William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. |
| 3 | * |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4 | * Copyright (C) 2002-2011 Aleph One Ltd. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5 | * for Toby Churchill Ltd and Brightstar Engineering |
| 6 | * |
| 7 | * Created by Charles Manning <charles@aleph1.co.uk> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 14 | #include "yportenv.h" |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 15 | #include "yaffs_trace.h" |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 16 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 17 | #include "yaffs_guts.h" |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 18 | #include "yaffs_getblockinfo.h" |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 19 | #include "yaffs_tagscompat.h" |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 20 | #include "yaffs_nand.h" |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 21 | #include "yaffs_yaffs1.h" |
| 22 | #include "yaffs_yaffs2.h" |
| 23 | #include "yaffs_bitmap.h" |
| 24 | #include "yaffs_verify.h" |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 25 | #include "yaffs_nand.h" |
| 26 | #include "yaffs_packedtags2.h" |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 27 | #include "yaffs_nameval.h" |
| 28 | #include "yaffs_allocator.h" |
| 29 | #include "yaffs_attribs.h" |
| 30 | #include "yaffs_summary.h" |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 31 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 32 | /* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ |
| 33 | #define YAFFS_GC_GOOD_ENOUGH 2 |
| 34 | #define YAFFS_GC_PASSIVE_THRESHOLD 4 |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 35 | |
| 36 | #include "yaffs_ecc.h" |
| 37 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 38 | /* Forward declarations */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 39 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 40 | static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, |
| 41 | const u8 *buffer, int n_bytes, int use_reserve); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 42 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 43 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 44 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 45 | /* Function to calculate chunk and offset */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 46 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 47 | void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, |
| 48 | int *chunk_out, u32 *offset_out) |
| 49 | { |
| 50 | int chunk; |
| 51 | u32 offset; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 52 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 53 | chunk = (u32) (addr >> dev->chunk_shift); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 54 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 55 | if (dev->chunk_div == 1) { |
| 56 | /* easy power of 2 case */ |
| 57 | offset = (u32) (addr & dev->chunk_mask); |
| 58 | } else { |
| 59 | /* Non power-of-2 case */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 60 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 61 | loff_t chunk_base; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 62 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 63 | chunk /= dev->chunk_div; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 64 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 65 | chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk; |
| 66 | offset = (u32) (addr - chunk_base); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 67 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 68 | |
| 69 | *chunk_out = chunk; |
| 70 | *offset_out = offset; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 71 | } |
| 72 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 73 | /* Function to return the number of shifts for a power of 2 greater than or |
| 74 | * equal to the given number |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 75 | * Note we don't try to cater for all possible numbers and this does not have to |
| 76 | * be hellishly efficient. |
| 77 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 78 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 79 | static inline u32 calc_shifts_ceiling(u32 x) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 80 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 81 | int extra_bits; |
| 82 | int shifts; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 83 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 84 | shifts = extra_bits = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 85 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 86 | while (x > 1) { |
| 87 | if (x & 1) |
| 88 | extra_bits++; |
| 89 | x >>= 1; |
| 90 | shifts++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 91 | } |
| 92 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 93 | if (extra_bits) |
| 94 | shifts++; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 95 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 96 | return shifts; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /* Function to return the number of shifts to get a 1 in bit 0 |
| 100 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 101 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 102 | static inline u32 calc_shifts(u32 x) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 103 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 104 | u32 shifts; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 105 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 106 | shifts = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 107 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 108 | if (!x) |
| 109 | return 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 110 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 111 | while (!(x & 1)) { |
| 112 | x >>= 1; |
| 113 | shifts++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 114 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 115 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 116 | return shifts; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 117 | } |
| 118 | |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 119 | /* |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 120 | * Temporary buffer manipulations. |
| 121 | */ |
| 122 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 123 | static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 124 | { |
| 125 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 126 | u8 *buf = (u8 *) 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 127 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 128 | memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 129 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 130 | for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 131 | dev->temp_buffer[i].in_use = 0; |
| 132 | buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); |
| 133 | dev->temp_buffer[i].buffer = buf; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 134 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 135 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 136 | return buf ? YAFFS_OK : YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 137 | } |
| 138 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 139 | u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 140 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 141 | int i; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 142 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 143 | dev->temp_in_use++; |
| 144 | if (dev->temp_in_use > dev->max_temp) |
| 145 | dev->max_temp = dev->temp_in_use; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 146 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 147 | for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 148 | if (dev->temp_buffer[i].in_use == 0) { |
| 149 | dev->temp_buffer[i].in_use = 1; |
| 150 | return dev->temp_buffer[i].buffer; |
| 151 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 152 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 153 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 154 | yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 155 | /* |
| 156 | * If we got here then we have to allocate an unmanaged one |
| 157 | * This is not good. |
| 158 | */ |
| 159 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 160 | dev->unmanaged_buffer_allocs++; |
| 161 | return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 162 | |
| 163 | } |
| 164 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 165 | void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 166 | { |
| 167 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 168 | |
| 169 | dev->temp_in_use--; |
| 170 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 171 | for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 172 | if (dev->temp_buffer[i].buffer == buffer) { |
| 173 | dev->temp_buffer[i].in_use = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 174 | return; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | if (buffer) { |
| 179 | /* assume it is an unmanaged one. */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 180 | yaffs_trace(YAFFS_TRACE_BUFFERS, |
| 181 | "Releasing unmanaged temp buffer"); |
| 182 | kfree(buffer); |
| 183 | dev->unmanaged_buffer_deallocs++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * Determine if we have a managed buffer. |
| 190 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 191 | int yaffs_is_managed_tmp_buffer(struct yaffs_dev *dev, const u8 *buffer) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 192 | { |
| 193 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 194 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 195 | for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 196 | if (dev->temp_buffer[i].buffer == buffer) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 197 | return 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 198 | } |
| 199 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 200 | for (i = 0; i < dev->param.n_caches; i++) { |
| 201 | if (dev->cache[i].data == buffer) |
| 202 | return 1; |
| 203 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 204 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 205 | if (buffer == dev->checkpt_buffer) |
| 206 | return 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 207 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 208 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 209 | "yaffs: unmaged buffer detected."); |
| 210 | return 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 211 | } |
| 212 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 213 | /* |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 214 | * Functions for robustisizing TODO |
| 215 | * |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 216 | */ |
| 217 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 218 | static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk, |
| 219 | const u8 *data, |
| 220 | const struct yaffs_ext_tags *tags) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 221 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 222 | dev = dev; |
| 223 | nand_chunk = nand_chunk; |
| 224 | data = data; |
| 225 | tags = tags; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 226 | } |
| 227 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 228 | static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, |
| 229 | const struct yaffs_ext_tags *tags) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 230 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 231 | dev = dev; |
| 232 | nand_chunk = nand_chunk; |
| 233 | tags = tags; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 234 | } |
| 235 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 236 | void yaffs_handle_chunk_error(struct yaffs_dev *dev, |
| 237 | struct yaffs_block_info *bi) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 238 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 239 | if (!bi->gc_prioritise) { |
| 240 | bi->gc_prioritise = 1; |
| 241 | dev->has_pending_prioritised_gc = 1; |
| 242 | bi->chunk_error_strikes++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 243 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 244 | if (bi->chunk_error_strikes > 3) { |
| 245 | bi->needs_retiring = 1; /* Too many stikes, so retire */ |
| 246 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 247 | "yaffs: Block struck out"); |
| 248 | |
| 249 | } |
| 250 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 251 | } |
| 252 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 253 | static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, |
| 254 | int erased_ok) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 255 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 256 | int flash_block = nand_chunk / dev->param.chunks_per_block; |
| 257 | struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 258 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 259 | yaffs_handle_chunk_error(dev, bi); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 260 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 261 | if (erased_ok) { |
| 262 | /* Was an actual write failure, |
| 263 | * so mark the block for retirement.*/ |
| 264 | bi->needs_retiring = 1; |
| 265 | yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, |
| 266 | "**>> Block %d needs retiring", flash_block); |
| 267 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 268 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 269 | /* Delete the chunk */ |
| 270 | yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); |
| 271 | yaffs_skip_rest_of_block(dev); |
| 272 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 273 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 274 | /* |
| 275 | * Verification code |
| 276 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 277 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 278 | /* |
| 279 | * Simple hash function. Needs to have a reasonable spread |
| 280 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 281 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 282 | static inline int yaffs_hash_fn(int n) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 283 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 284 | if (n < 0) |
| 285 | n = -n; |
| 286 | return n % YAFFS_NOBJECT_BUCKETS; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 287 | } |
| 288 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 289 | /* |
| 290 | * Access functions to useful fake objects. |
| 291 | * Note that root might have a presence in NAND if permissions are set. |
| 292 | */ |
| 293 | |
| 294 | struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 295 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 296 | return dev->root_dir; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 297 | } |
| 298 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 299 | struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 300 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 301 | return dev->lost_n_found; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 302 | } |
| 303 | |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 304 | /* |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 305 | * Erased NAND checking functions |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 306 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 307 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 308 | int yaffs_check_ff(u8 *buffer, int n_bytes) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 309 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 310 | /* Horrible, slow implementation */ |
| 311 | while (n_bytes--) { |
| 312 | if (*buffer != 0xff) |
| 313 | return 0; |
| 314 | buffer++; |
| 315 | } |
| 316 | return 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 317 | } |
| 318 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 319 | static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 320 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 321 | int retval = YAFFS_OK; |
| 322 | u8 *data = yaffs_get_temp_buffer(dev); |
| 323 | struct yaffs_ext_tags tags; |
| 324 | int result; |
| 325 | |
| 326 | result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); |
| 327 | |
| 328 | if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) |
| 329 | retval = YAFFS_FAIL; |
| 330 | |
| 331 | if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || |
| 332 | tags.chunk_used) { |
| 333 | yaffs_trace(YAFFS_TRACE_NANDACCESS, |
| 334 | "Chunk %d not erased", nand_chunk); |
| 335 | retval = YAFFS_FAIL; |
| 336 | } |
| 337 | |
| 338 | yaffs_release_temp_buffer(dev, data); |
| 339 | |
| 340 | return retval; |
| 341 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 342 | } |
| 343 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 344 | static int yaffs_verify_chunk_written(struct yaffs_dev *dev, |
| 345 | int nand_chunk, |
| 346 | const u8 *data, |
| 347 | struct yaffs_ext_tags *tags) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 348 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 349 | int retval = YAFFS_OK; |
| 350 | struct yaffs_ext_tags temp_tags; |
| 351 | u8 *buffer = yaffs_get_temp_buffer(dev); |
| 352 | int result; |
| 353 | |
| 354 | result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags); |
| 355 | if (memcmp(buffer, data, dev->data_bytes_per_chunk) || |
| 356 | temp_tags.obj_id != tags->obj_id || |
| 357 | temp_tags.chunk_id != tags->chunk_id || |
| 358 | temp_tags.n_bytes != tags->n_bytes) |
| 359 | retval = YAFFS_FAIL; |
| 360 | |
| 361 | yaffs_release_temp_buffer(dev, buffer); |
| 362 | |
| 363 | return retval; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 364 | } |
| 365 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 366 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 367 | int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 368 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 369 | int reserved_chunks; |
| 370 | int reserved_blocks = dev->param.n_reserved_blocks; |
| 371 | int checkpt_blocks; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 372 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 373 | checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 374 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 375 | reserved_chunks = |
| 376 | (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 377 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 378 | return (dev->n_free_chunks > (reserved_chunks + n_chunks)); |
| 379 | } |
| 380 | |
| 381 | static int yaffs_find_alloc_block(struct yaffs_dev *dev) |
| 382 | { |
| 383 | int i; |
| 384 | struct yaffs_block_info *bi; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 385 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 386 | if (dev->n_erased_blocks < 1) { |
| 387 | /* Hoosterman we've got a problem. |
| 388 | * Can't get space to gc |
| 389 | */ |
| 390 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 391 | "yaffs tragedy: no more erased blocks"); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 392 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 393 | return -1; |
| 394 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 395 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 396 | /* Find an empty block. */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 397 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 398 | for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { |
| 399 | dev->alloc_block_finder++; |
| 400 | if (dev->alloc_block_finder < dev->internal_start_block |
| 401 | || dev->alloc_block_finder > dev->internal_end_block) { |
| 402 | dev->alloc_block_finder = dev->internal_start_block; |
| 403 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 404 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 405 | bi = yaffs_get_block_info(dev, dev->alloc_block_finder); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 406 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 407 | if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { |
| 408 | bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; |
| 409 | dev->seq_number++; |
| 410 | bi->seq_number = dev->seq_number; |
| 411 | dev->n_erased_blocks--; |
| 412 | yaffs_trace(YAFFS_TRACE_ALLOCATE, |
| 413 | "Allocated block %d, seq %d, %d left" , |
| 414 | dev->alloc_block_finder, dev->seq_number, |
| 415 | dev->n_erased_blocks); |
| 416 | return dev->alloc_block_finder; |
| 417 | } |
| 418 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 419 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 420 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 421 | "yaffs tragedy: no more erased blocks, but there should have been %d", |
| 422 | dev->n_erased_blocks); |
| 423 | |
| 424 | return -1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 425 | } |
| 426 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 427 | static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, |
| 428 | struct yaffs_block_info **block_ptr) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 429 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 430 | int ret_val; |
| 431 | struct yaffs_block_info *bi; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 432 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 433 | if (dev->alloc_block < 0) { |
| 434 | /* Get next block to allocate off */ |
| 435 | dev->alloc_block = yaffs_find_alloc_block(dev); |
| 436 | dev->alloc_page = 0; |
| 437 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 438 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 439 | if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { |
| 440 | /* No space unless we're allowed to use the reserve. */ |
| 441 | return -1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 442 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 443 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 444 | if (dev->n_erased_blocks < dev->param.n_reserved_blocks |
| 445 | && dev->alloc_page == 0) |
| 446 | yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 447 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 448 | /* Next page please.... */ |
| 449 | if (dev->alloc_block >= 0) { |
| 450 | bi = yaffs_get_block_info(dev, dev->alloc_block); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 451 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 452 | ret_val = (dev->alloc_block * dev->param.chunks_per_block) + |
| 453 | dev->alloc_page; |
| 454 | bi->pages_in_use++; |
| 455 | yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 456 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 457 | dev->alloc_page++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 458 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 459 | dev->n_free_chunks--; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 460 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 461 | /* If the block is full set the state to full */ |
| 462 | if (dev->alloc_page >= dev->param.chunks_per_block) { |
| 463 | bi->block_state = YAFFS_BLOCK_STATE_FULL; |
| 464 | dev->alloc_block = -1; |
| 465 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 466 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 467 | if (block_ptr) |
| 468 | *block_ptr = bi; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 469 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 470 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 471 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 472 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 473 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 474 | "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 475 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 476 | return -1; |
| 477 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 478 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 479 | static int yaffs_get_erased_chunks(struct yaffs_dev *dev) |
| 480 | { |
| 481 | int n; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 482 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 483 | n = dev->n_erased_blocks * dev->param.chunks_per_block; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 484 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 485 | if (dev->alloc_block > 0) |
| 486 | n += (dev->param.chunks_per_block - dev->alloc_page); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 487 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 488 | return n; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 489 | |
| 490 | } |
| 491 | |
| 492 | /* |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 493 | * yaffs_skip_rest_of_block() skips over the rest of the allocation block |
| 494 | * if we don't want to write to it. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 495 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 496 | void yaffs_skip_rest_of_block(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 497 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 498 | struct yaffs_block_info *bi; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 499 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 500 | if (dev->alloc_block > 0) { |
| 501 | bi = yaffs_get_block_info(dev, dev->alloc_block); |
| 502 | if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { |
| 503 | bi->block_state = YAFFS_BLOCK_STATE_FULL; |
| 504 | dev->alloc_block = -1; |
| 505 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 506 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 507 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 508 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 509 | static int yaffs_write_new_chunk(struct yaffs_dev *dev, |
| 510 | const u8 *data, |
| 511 | struct yaffs_ext_tags *tags, int use_reserver) |
| 512 | { |
| 513 | int attempts = 0; |
| 514 | int write_ok = 0; |
| 515 | int chunk; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 516 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 517 | yaffs2_checkpt_invalidate(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 518 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 519 | do { |
| 520 | struct yaffs_block_info *bi = 0; |
| 521 | int erased_ok = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 522 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 523 | chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); |
| 524 | if (chunk < 0) { |
| 525 | /* no space */ |
| 526 | break; |
| 527 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 528 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 529 | /* First check this chunk is erased, if it needs |
| 530 | * checking. The checking policy (unless forced |
| 531 | * always on) is as follows: |
| 532 | * |
| 533 | * Check the first page we try to write in a block. |
| 534 | * If the check passes then we don't need to check any |
| 535 | * more. If the check fails, we check again... |
| 536 | * If the block has been erased, we don't need to check. |
| 537 | * |
| 538 | * However, if the block has been prioritised for gc, |
| 539 | * then we think there might be something odd about |
| 540 | * this block and stop using it. |
| 541 | * |
| 542 | * Rationale: We should only ever see chunks that have |
| 543 | * not been erased if there was a partially written |
| 544 | * chunk due to power loss. This checking policy should |
| 545 | * catch that case with very few checks and thus save a |
| 546 | * lot of checks that are most likely not needed. |
| 547 | * |
| 548 | * Mods to the above |
| 549 | * If an erase check fails or the write fails we skip the |
| 550 | * rest of the block. |
| 551 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 552 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 553 | /* let's give it a try */ |
| 554 | attempts++; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 555 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 556 | if (dev->param.always_check_erased) |
| 557 | bi->skip_erased_check = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 558 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 559 | if (!bi->skip_erased_check) { |
| 560 | erased_ok = yaffs_check_chunk_erased(dev, chunk); |
| 561 | if (erased_ok != YAFFS_OK) { |
| 562 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 563 | "**>> yaffs chunk %d was not erased", |
| 564 | chunk); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 565 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 566 | /* If not erased, delete this one, |
| 567 | * skip rest of block and |
| 568 | * try another chunk */ |
| 569 | yaffs_chunk_del(dev, chunk, 1, __LINE__); |
| 570 | yaffs_skip_rest_of_block(dev); |
| 571 | continue; |
| 572 | } |
| 573 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 574 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 575 | write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 576 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 577 | if (!bi->skip_erased_check) |
| 578 | write_ok = |
| 579 | yaffs_verify_chunk_written(dev, chunk, data, tags); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 580 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 581 | if (write_ok != YAFFS_OK) { |
| 582 | /* Clean up aborted write, skip to next block and |
| 583 | * try another chunk */ |
| 584 | yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); |
| 585 | continue; |
| 586 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 587 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 588 | bi->skip_erased_check = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 589 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 590 | /* Copy the data into the robustification buffer */ |
| 591 | yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); |
| 592 | |
| 593 | } while (write_ok != YAFFS_OK && |
| 594 | (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); |
| 595 | |
| 596 | if (!write_ok) |
| 597 | chunk = -1; |
| 598 | |
| 599 | if (attempts > 1) { |
| 600 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 601 | "**>> yaffs write required %d attempts", |
| 602 | attempts); |
| 603 | dev->n_retried_writes += (attempts - 1); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 604 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 605 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 606 | return chunk; |
| 607 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 608 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 609 | /* |
| 610 | * Block retiring for handling a broken block. |
| 611 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 612 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 613 | static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) |
| 614 | { |
| 615 | struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 616 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 617 | yaffs2_checkpt_invalidate(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 618 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 619 | yaffs2_clear_oldest_dirty_seq(dev, bi); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 620 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 621 | if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { |
| 622 | if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { |
| 623 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 624 | "yaffs: Failed to mark bad and erase block %d", |
| 625 | flash_block); |
| 626 | } else { |
| 627 | struct yaffs_ext_tags tags; |
| 628 | int chunk_id = |
| 629 | flash_block * dev->param.chunks_per_block; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 630 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 631 | u8 *buffer = yaffs_get_temp_buffer(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 632 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 633 | memset(buffer, 0xff, dev->data_bytes_per_chunk); |
| 634 | memset(&tags, 0, sizeof(tags)); |
| 635 | tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; |
| 636 | if (dev->param.write_chunk_tags_fn(dev, chunk_id - |
| 637 | dev->chunk_offset, |
| 638 | buffer, |
| 639 | &tags) != YAFFS_OK) |
| 640 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 641 | "yaffs: Failed to write bad block marker to block %d", |
| 642 | flash_block); |
| 643 | |
| 644 | yaffs_release_temp_buffer(dev, buffer); |
| 645 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 646 | } |
| 647 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 648 | bi->block_state = YAFFS_BLOCK_STATE_DEAD; |
| 649 | bi->gc_prioritise = 0; |
| 650 | bi->needs_retiring = 0; |
| 651 | |
| 652 | dev->n_retired_blocks++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 653 | } |
| 654 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 655 | /*---------------- Name handling functions ------------*/ |
| 656 | |
| 657 | static u16 yaffs_calc_name_sum(const YCHAR *name) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 658 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 659 | u16 sum = 0; |
| 660 | u16 i = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 661 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 662 | if (!name) |
| 663 | return 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 664 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 665 | while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) { |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 666 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 667 | /* 0x1f mask is case insensitive */ |
| 668 | sum += ((*name) & 0x1f) * i; |
| 669 | i++; |
| 670 | name++; |
| 671 | } |
| 672 | return sum; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 673 | } |
| 674 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 675 | void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 676 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 677 | memset(obj->short_name, 0, sizeof(obj->short_name)); |
| 678 | if (name && |
| 679 | yaffs_strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= |
| 680 | YAFFS_SHORT_NAME_LENGTH) |
| 681 | yaffs_strcpy(obj->short_name, name); |
| 682 | else |
| 683 | obj->short_name[0] = _Y('\0'); |
| 684 | obj->sum = yaffs_calc_name_sum(name); |
| 685 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 686 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 687 | void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, |
| 688 | const struct yaffs_obj_hdr *oh) |
| 689 | { |
| 690 | #ifdef CONFIG_YAFFS_AUTO_UNICODE |
| 691 | YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; |
| 692 | memset(tmp_name, 0, sizeof(tmp_name)); |
| 693 | yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, |
| 694 | YAFFS_MAX_NAME_LENGTH + 1); |
| 695 | yaffs_set_obj_name(obj, tmp_name); |
| 696 | #else |
| 697 | yaffs_set_obj_name(obj, oh->name); |
| 698 | #endif |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 699 | } |
| 700 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 701 | loff_t yaffs_max_file_size(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 702 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 703 | return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 704 | } |
| 705 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 706 | /*-------------------- TNODES ------------------- |
| 707 | |
| 708 | * List of spare tnodes |
| 709 | * The list is hooked together using the first pointer |
| 710 | * in the tnode. |
| 711 | */ |
| 712 | |
| 713 | struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 714 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 715 | struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 716 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 717 | if (tn) { |
| 718 | memset(tn, 0, dev->tnode_size); |
| 719 | dev->n_tnodes++; |
| 720 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 721 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 722 | dev->checkpoint_blocks_required = 0; /* force recalculation */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 723 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 724 | return tn; |
| 725 | } |
| 726 | |
| 727 | /* FreeTnode frees up a tnode and puts it back on the free list */ |
| 728 | static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) |
| 729 | { |
| 730 | yaffs_free_raw_tnode(dev, tn); |
| 731 | dev->n_tnodes--; |
| 732 | dev->checkpoint_blocks_required = 0; /* force recalculation */ |
| 733 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 734 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 735 | static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) |
| 736 | { |
| 737 | yaffs_deinit_raw_tnodes_and_objs(dev); |
| 738 | dev->n_obj = 0; |
| 739 | dev->n_tnodes = 0; |
| 740 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 741 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 742 | void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, |
| 743 | unsigned pos, unsigned val) |
| 744 | { |
| 745 | u32 *map = (u32 *) tn; |
| 746 | u32 bit_in_map; |
| 747 | u32 bit_in_word; |
| 748 | u32 word_in_map; |
| 749 | u32 mask; |
| 750 | |
| 751 | pos &= YAFFS_TNODES_LEVEL0_MASK; |
| 752 | val >>= dev->chunk_grp_bits; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 753 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 754 | bit_in_map = pos * dev->tnode_width; |
| 755 | word_in_map = bit_in_map / 32; |
| 756 | bit_in_word = bit_in_map & (32 - 1); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 757 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 758 | mask = dev->tnode_mask << bit_in_word; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 759 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 760 | map[word_in_map] &= ~mask; |
| 761 | map[word_in_map] |= (mask & (val << bit_in_word)); |
| 762 | |
| 763 | if (dev->tnode_width > (32 - bit_in_word)) { |
| 764 | bit_in_word = (32 - bit_in_word); |
| 765 | word_in_map++; |
| 766 | mask = |
| 767 | dev->tnode_mask >> bit_in_word; |
| 768 | map[word_in_map] &= ~mask; |
| 769 | map[word_in_map] |= (mask & (val >> bit_in_word)); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 770 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 771 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 772 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 773 | u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, |
| 774 | unsigned pos) |
| 775 | { |
| 776 | u32 *map = (u32 *) tn; |
| 777 | u32 bit_in_map; |
| 778 | u32 bit_in_word; |
| 779 | u32 word_in_map; |
| 780 | u32 val; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 781 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 782 | pos &= YAFFS_TNODES_LEVEL0_MASK; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 783 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 784 | bit_in_map = pos * dev->tnode_width; |
| 785 | word_in_map = bit_in_map / 32; |
| 786 | bit_in_word = bit_in_map & (32 - 1); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 787 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 788 | val = map[word_in_map] >> bit_in_word; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 789 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 790 | if (dev->tnode_width > (32 - bit_in_word)) { |
| 791 | bit_in_word = (32 - bit_in_word); |
| 792 | word_in_map++; |
| 793 | val |= (map[word_in_map] << bit_in_word); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 794 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 795 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 796 | val &= dev->tnode_mask; |
| 797 | val <<= dev->chunk_grp_bits; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 798 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 799 | return val; |
| 800 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 801 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 802 | /* ------------------- End of individual tnode manipulation -----------------*/ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 803 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 804 | /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ |
| 805 | * The look up tree is represented by the top tnode and the number of top_level |
| 806 | * in the tree. 0 means only the level 0 tnode is in the tree. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 807 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 808 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 809 | /* FindLevel0Tnode finds the level 0 tnode, if one exists. */ |
| 810 | struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, |
| 811 | struct yaffs_file_var *file_struct, |
| 812 | u32 chunk_id) |
| 813 | { |
| 814 | struct yaffs_tnode *tn = file_struct->top; |
| 815 | u32 i; |
| 816 | int required_depth; |
| 817 | int level = file_struct->top_level; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 818 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 819 | dev = dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 820 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 821 | /* Check sane level and chunk Id */ |
| 822 | if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) |
| 823 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 824 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 825 | if (chunk_id > YAFFS_MAX_CHUNK_ID) |
| 826 | return NULL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 827 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 828 | /* First check we're tall enough (ie enough top_level) */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 829 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 830 | i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; |
| 831 | required_depth = 0; |
| 832 | while (i) { |
| 833 | i >>= YAFFS_TNODES_INTERNAL_BITS; |
| 834 | required_depth++; |
| 835 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 836 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 837 | if (required_depth > file_struct->top_level) |
| 838 | return NULL; /* Not tall enough, so we can't find it */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 839 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 840 | /* Traverse down to level 0 */ |
| 841 | while (level > 0 && tn) { |
| 842 | tn = tn->internal[(chunk_id >> |
| 843 | (YAFFS_TNODES_LEVEL0_BITS + |
| 844 | (level - 1) * |
| 845 | YAFFS_TNODES_INTERNAL_BITS)) & |
| 846 | YAFFS_TNODES_INTERNAL_MASK]; |
| 847 | level--; |
| 848 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 849 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 850 | return tn; |
| 851 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 852 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 853 | /* add_find_tnode_0 finds the level 0 tnode if it exists, |
| 854 | * otherwise first expands the tree. |
| 855 | * This happens in two steps: |
| 856 | * 1. If the tree isn't tall enough, then make it taller. |
| 857 | * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. |
| 858 | * |
| 859 | * Used when modifying the tree. |
| 860 | * |
| 861 | * If the tn argument is NULL, then a fresh tnode will be added otherwise the |
| 862 | * specified tn will be plugged into the ttree. |
| 863 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 864 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 865 | struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, |
| 866 | struct yaffs_file_var *file_struct, |
| 867 | u32 chunk_id, |
| 868 | struct yaffs_tnode *passed_tn) |
| 869 | { |
| 870 | int required_depth; |
| 871 | int i; |
| 872 | int l; |
| 873 | struct yaffs_tnode *tn; |
| 874 | u32 x; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 875 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 876 | /* Check sane level and page Id */ |
| 877 | if (file_struct->top_level < 0 || |
| 878 | file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) |
| 879 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 880 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 881 | if (chunk_id > YAFFS_MAX_CHUNK_ID) |
| 882 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 883 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 884 | /* First check we're tall enough (ie enough top_level) */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 885 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 886 | x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; |
| 887 | required_depth = 0; |
| 888 | while (x) { |
| 889 | x >>= YAFFS_TNODES_INTERNAL_BITS; |
| 890 | required_depth++; |
| 891 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 892 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 893 | if (required_depth > file_struct->top_level) { |
| 894 | /* Not tall enough, gotta make the tree taller */ |
| 895 | for (i = file_struct->top_level; i < required_depth; i++) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 896 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 897 | tn = yaffs_get_tnode(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 898 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 899 | if (tn) { |
| 900 | tn->internal[0] = file_struct->top; |
| 901 | file_struct->top = tn; |
| 902 | file_struct->top_level++; |
| 903 | } else { |
| 904 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 905 | "yaffs: no more tnodes"); |
| 906 | return NULL; |
| 907 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 908 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 909 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 910 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 911 | /* Traverse down to level 0, adding anything we need */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 912 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 913 | l = file_struct->top_level; |
| 914 | tn = file_struct->top; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 915 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 916 | if (l > 0) { |
| 917 | while (l > 0 && tn) { |
| 918 | x = (chunk_id >> |
| 919 | (YAFFS_TNODES_LEVEL0_BITS + |
| 920 | (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & |
| 921 | YAFFS_TNODES_INTERNAL_MASK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 922 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 923 | if ((l > 1) && !tn->internal[x]) { |
| 924 | /* Add missing non-level-zero tnode */ |
| 925 | tn->internal[x] = yaffs_get_tnode(dev); |
| 926 | if (!tn->internal[x]) |
| 927 | return NULL; |
| 928 | } else if (l == 1) { |
| 929 | /* Looking from level 1 at level 0 */ |
| 930 | if (passed_tn) { |
| 931 | /* If we already have one, release it */ |
| 932 | if (tn->internal[x]) |
| 933 | yaffs_free_tnode(dev, |
| 934 | tn->internal[x]); |
| 935 | tn->internal[x] = passed_tn; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 936 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 937 | } else if (!tn->internal[x]) { |
| 938 | /* Don't have one, none passed in */ |
| 939 | tn->internal[x] = yaffs_get_tnode(dev); |
| 940 | if (!tn->internal[x]) |
| 941 | return NULL; |
| 942 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 943 | } |
| 944 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 945 | tn = tn->internal[x]; |
| 946 | l--; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 947 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 948 | } else { |
| 949 | /* top is level 0 */ |
| 950 | if (passed_tn) { |
| 951 | memcpy(tn, passed_tn, |
| 952 | (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); |
| 953 | yaffs_free_tnode(dev, passed_tn); |
| 954 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 955 | } |
| 956 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 957 | return tn; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 958 | } |
| 959 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 960 | static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, |
| 961 | int chunk_obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 962 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 963 | return (tags->chunk_id == chunk_obj && |
| 964 | tags->obj_id == obj_id && |
| 965 | !tags->is_deleted) ? 1 : 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 966 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 967 | } |
| 968 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 969 | static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, |
| 970 | struct yaffs_ext_tags *tags, int obj_id, |
| 971 | int inode_chunk) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 972 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 973 | int j; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 974 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 975 | for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { |
| 976 | if (yaffs_check_chunk_bit |
| 977 | (dev, the_chunk / dev->param.chunks_per_block, |
| 978 | the_chunk % dev->param.chunks_per_block)) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 979 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 980 | if (dev->chunk_grp_size == 1) |
| 981 | return the_chunk; |
| 982 | else { |
| 983 | yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, |
| 984 | tags); |
| 985 | if (yaffs_tags_match(tags, |
| 986 | obj_id, inode_chunk)) { |
| 987 | /* found it; */ |
| 988 | return the_chunk; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 989 | } |
| 990 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 991 | } |
| 992 | the_chunk++; |
| 993 | } |
| 994 | return -1; |
| 995 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 996 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 997 | static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk, |
| 998 | struct yaffs_ext_tags *tags) |
| 999 | { |
| 1000 | /*Get the Tnode, then get the level 0 offset chunk offset */ |
| 1001 | struct yaffs_tnode *tn; |
| 1002 | int the_chunk = -1; |
| 1003 | struct yaffs_ext_tags local_tags; |
| 1004 | int ret_val = -1; |
| 1005 | struct yaffs_dev *dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1006 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1007 | if (!tags) { |
| 1008 | /* Passed a NULL, so use our own tags space */ |
| 1009 | tags = &local_tags; |
| 1010 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1011 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1012 | tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1013 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1014 | if (!tn) |
| 1015 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1016 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1017 | the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1018 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1019 | ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, |
| 1020 | inode_chunk); |
| 1021 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1022 | } |
| 1023 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1024 | static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, |
| 1025 | struct yaffs_ext_tags *tags) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1026 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1027 | /* Get the Tnode, then get the level 0 offset chunk offset */ |
| 1028 | struct yaffs_tnode *tn; |
| 1029 | int the_chunk = -1; |
| 1030 | struct yaffs_ext_tags local_tags; |
| 1031 | struct yaffs_dev *dev = in->my_dev; |
| 1032 | int ret_val = -1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1033 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1034 | if (!tags) { |
| 1035 | /* Passed a NULL, so use our own tags space */ |
| 1036 | tags = &local_tags; |
| 1037 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1038 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1039 | tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1040 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1041 | if (!tn) |
| 1042 | return ret_val; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1043 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1044 | the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1045 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1046 | ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, |
| 1047 | inode_chunk); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1048 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1049 | /* Delete the entry in the filestructure (if found) */ |
| 1050 | if (ret_val != -1) |
| 1051 | yaffs_load_tnode_0(dev, tn, inode_chunk, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1052 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1053 | return ret_val; |
| 1054 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1055 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1056 | int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, |
| 1057 | int nand_chunk, int in_scan) |
| 1058 | { |
| 1059 | /* NB in_scan is zero unless scanning. |
| 1060 | * For forward scanning, in_scan is > 0; |
| 1061 | * for backward scanning in_scan is < 0 |
| 1062 | * |
| 1063 | * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. |
| 1064 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1065 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1066 | struct yaffs_tnode *tn; |
| 1067 | struct yaffs_dev *dev = in->my_dev; |
| 1068 | int existing_cunk; |
| 1069 | struct yaffs_ext_tags existing_tags; |
| 1070 | struct yaffs_ext_tags new_tags; |
| 1071 | unsigned existing_serial, new_serial; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1072 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1073 | if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { |
| 1074 | /* Just ignore an attempt at putting a chunk into a non-file |
| 1075 | * during scanning. |
| 1076 | * If it is not during Scanning then something went wrong! |
| 1077 | */ |
| 1078 | if (!in_scan) { |
| 1079 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 1080 | "yaffs tragedy:attempt to put data chunk into a non-file" |
| 1081 | ); |
| 1082 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1083 | } |
| 1084 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1085 | yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); |
| 1086 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1087 | } |
| 1088 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1089 | tn = yaffs_add_find_tnode_0(dev, |
| 1090 | &in->variant.file_variant, |
| 1091 | inode_chunk, NULL); |
| 1092 | if (!tn) |
| 1093 | return YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1094 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1095 | if (!nand_chunk) |
| 1096 | /* Dummy insert, bail now */ |
| 1097 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1098 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1099 | existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1100 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1101 | if (in_scan != 0) { |
| 1102 | /* If we're scanning then we need to test for duplicates |
| 1103 | * NB This does not need to be efficient since it should only |
| 1104 | * happen when the power fails during a write, then only one |
| 1105 | * chunk should ever be affected. |
| 1106 | * |
| 1107 | * Correction for YAFFS2: This could happen quite a lot and we |
| 1108 | * need to think about efficiency! TODO |
| 1109 | * Update: For backward scanning we don't need to re-read tags |
| 1110 | * so this is quite cheap. |
| 1111 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1112 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1113 | if (existing_cunk > 0) { |
| 1114 | /* NB Right now existing chunk will not be real |
| 1115 | * chunk_id if the chunk group size > 1 |
| 1116 | * thus we have to do a FindChunkInFile to get the |
| 1117 | * real chunk id. |
| 1118 | * |
| 1119 | * We have a duplicate now we need to decide which |
| 1120 | * one to use: |
| 1121 | * |
| 1122 | * Backwards scanning YAFFS2: The old one is what |
| 1123 | * we use, dump the new one. |
| 1124 | * YAFFS1: Get both sets of tags and compare serial |
| 1125 | * numbers. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1126 | */ |
| 1127 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1128 | if (in_scan > 0) { |
| 1129 | /* Only do this for forward scanning */ |
| 1130 | yaffs_rd_chunk_tags_nand(dev, |
| 1131 | nand_chunk, |
| 1132 | NULL, &new_tags); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1133 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1134 | /* Do a proper find */ |
| 1135 | existing_cunk = |
| 1136 | yaffs_find_chunk_in_file(in, inode_chunk, |
| 1137 | &existing_tags); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1138 | } |
| 1139 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1140 | if (existing_cunk <= 0) { |
| 1141 | /*Hoosterman - how did this happen? */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1142 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1143 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 1144 | "yaffs tragedy: existing chunk < 0 in scan" |
| 1145 | ); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1146 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1147 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1148 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1149 | /* NB The deleted flags should be false, otherwise |
| 1150 | * the chunks will not be loaded during a scan |
| 1151 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1152 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1153 | if (in_scan > 0) { |
| 1154 | new_serial = new_tags.serial_number; |
| 1155 | existing_serial = existing_tags.serial_number; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1156 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1157 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1158 | if ((in_scan > 0) && |
| 1159 | (existing_cunk <= 0 || |
| 1160 | ((existing_serial + 1) & 3) == new_serial)) { |
| 1161 | /* Forward scanning. |
| 1162 | * Use new |
| 1163 | * Delete the old one and drop through to |
| 1164 | * update the tnode |
| 1165 | */ |
| 1166 | yaffs_chunk_del(dev, existing_cunk, 1, |
| 1167 | __LINE__); |
| 1168 | } else { |
| 1169 | /* Backward scanning or we want to use the |
| 1170 | * existing one |
| 1171 | * Delete the new one and return early so that |
| 1172 | * the tnode isn't changed |
| 1173 | */ |
| 1174 | yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); |
| 1175 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1176 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1177 | } |
| 1178 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1179 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1180 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1181 | if (existing_cunk == 0) |
| 1182 | in->n_data_chunks++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1183 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1184 | yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); |
| 1185 | |
| 1186 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1187 | } |
| 1188 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1189 | static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1190 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1191 | struct yaffs_block_info *the_block; |
| 1192 | unsigned block_no; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1193 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1194 | yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); |
| 1195 | |
| 1196 | block_no = chunk / dev->param.chunks_per_block; |
| 1197 | the_block = yaffs_get_block_info(dev, block_no); |
| 1198 | if (the_block) { |
| 1199 | the_block->soft_del_pages++; |
| 1200 | dev->n_free_chunks++; |
| 1201 | yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1202 | } |
| 1203 | } |
| 1204 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1205 | /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all |
| 1206 | * the chunks in the file. |
| 1207 | * All soft deleting does is increment the block's softdelete count and pulls |
| 1208 | * the chunk out of the tnode. |
| 1209 | * Thus, essentially this is the same as DeleteWorker except that the chunks |
| 1210 | * are soft deleted. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1211 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1212 | |
| 1213 | static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, |
| 1214 | u32 level, int chunk_offset) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1215 | { |
| 1216 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1217 | int the_chunk; |
| 1218 | int all_done = 1; |
| 1219 | struct yaffs_dev *dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1220 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1221 | if (!tn) |
| 1222 | return 1; |
| 1223 | |
| 1224 | if (level > 0) { |
| 1225 | for (i = YAFFS_NTNODES_INTERNAL - 1; |
| 1226 | all_done && i >= 0; |
| 1227 | i--) { |
| 1228 | if (tn->internal[i]) { |
| 1229 | all_done = |
| 1230 | yaffs_soft_del_worker(in, |
| 1231 | tn->internal[i], |
| 1232 | level - 1, |
| 1233 | (chunk_offset << |
| 1234 | YAFFS_TNODES_INTERNAL_BITS) |
| 1235 | + i); |
| 1236 | if (all_done) { |
| 1237 | yaffs_free_tnode(dev, |
| 1238 | tn->internal[i]); |
| 1239 | tn->internal[i] = NULL; |
| 1240 | } else { |
| 1241 | /* Can this happen? */ |
| 1242 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1243 | } |
| 1244 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1245 | return (all_done) ? 1 : 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1246 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1247 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1248 | /* level 0 */ |
| 1249 | for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { |
| 1250 | the_chunk = yaffs_get_group_base(dev, tn, i); |
| 1251 | if (the_chunk) { |
| 1252 | yaffs_soft_del_chunk(dev, the_chunk); |
| 1253 | yaffs_load_tnode_0(dev, tn, i, 0); |
| 1254 | } |
| 1255 | } |
| 1256 | return 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1257 | } |
| 1258 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1259 | static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1260 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1261 | struct yaffs_dev *dev = obj->my_dev; |
| 1262 | struct yaffs_obj *parent; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1263 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1264 | yaffs_verify_obj_in_dir(obj); |
| 1265 | parent = obj->parent; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1266 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1267 | yaffs_verify_dir(parent); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1268 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1269 | if (dev && dev->param.remove_obj_fn) |
| 1270 | dev->param.remove_obj_fn(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1271 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1272 | list_del_init(&obj->siblings); |
| 1273 | obj->parent = NULL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1274 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1275 | yaffs_verify_dir(parent); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1276 | } |
| 1277 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1278 | void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1279 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1280 | if (!directory) { |
| 1281 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 1282 | "tragedy: Trying to add an object to a null pointer directory" |
| 1283 | ); |
| 1284 | BUG(); |
| 1285 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1286 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1287 | if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { |
| 1288 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 1289 | "tragedy: Trying to add an object to a non-directory" |
| 1290 | ); |
| 1291 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1292 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1293 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1294 | if (obj->siblings.prev == NULL) { |
| 1295 | /* Not initialised */ |
| 1296 | BUG(); |
| 1297 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1298 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1299 | yaffs_verify_dir(directory); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1300 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1301 | yaffs_remove_obj_from_dir(obj); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1302 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1303 | /* Now add it */ |
| 1304 | list_add(&obj->siblings, &directory->variant.dir_variant.children); |
| 1305 | obj->parent = directory; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1306 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1307 | if (directory == obj->my_dev->unlinked_dir |
| 1308 | || directory == obj->my_dev->del_dir) { |
| 1309 | obj->unlinked = 1; |
| 1310 | obj->my_dev->n_unlinked_files++; |
| 1311 | obj->rename_allowed = 0; |
| 1312 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1313 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1314 | yaffs_verify_dir(directory); |
| 1315 | yaffs_verify_obj_in_dir(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1316 | } |
| 1317 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1318 | static int yaffs_change_obj_name(struct yaffs_obj *obj, |
| 1319 | struct yaffs_obj *new_dir, |
| 1320 | const YCHAR *new_name, int force, int shadows) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1321 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1322 | int unlink_op; |
| 1323 | int del_op; |
| 1324 | struct yaffs_obj *existing_target; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1325 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1326 | if (new_dir == NULL) |
| 1327 | new_dir = obj->parent; /* use the old directory */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1328 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1329 | if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { |
| 1330 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 1331 | "tragedy: yaffs_change_obj_name: new_dir is not a directory" |
| 1332 | ); |
| 1333 | BUG(); |
| 1334 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1335 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1336 | unlink_op = (new_dir == obj->my_dev->unlinked_dir); |
| 1337 | del_op = (new_dir == obj->my_dev->del_dir); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1338 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1339 | existing_target = yaffs_find_by_name(new_dir, new_name); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1340 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1341 | /* If the object is a file going into the unlinked directory, |
| 1342 | * then it is OK to just stuff it in since duplicate names are OK. |
| 1343 | * else only proceed if the new name does not exist and we're putting |
| 1344 | * it into a directory. |
| 1345 | */ |
| 1346 | if (!(unlink_op || del_op || force || |
| 1347 | shadows > 0 || !existing_target) || |
| 1348 | new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) |
| 1349 | return YAFFS_FAIL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1350 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1351 | yaffs_set_obj_name(obj, new_name); |
| 1352 | obj->dirty = 1; |
| 1353 | yaffs_add_obj_to_dir(new_dir, obj); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1354 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1355 | if (unlink_op) |
| 1356 | obj->unlinked = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1357 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1358 | /* If it is a deletion then we mark it as a shrink for gc */ |
| 1359 | if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0) |
| 1360 | return YAFFS_OK; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1361 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1362 | return YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1363 | } |
| 1364 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1365 | /*------------------------ Short Operations Cache ------------------------------ |
| 1366 | * In many situations where there is no high level buffering a lot of |
| 1367 | * reads might be short sequential reads, and a lot of writes may be short |
| 1368 | * sequential writes. eg. scanning/writing a jpeg file. |
| 1369 | * In these cases, a short read/write cache can provide a huge perfomance |
| 1370 | * benefit with dumb-as-a-rock code. |
| 1371 | * In Linux, the page cache provides read buffering and the short op cache |
| 1372 | * provides write buffering. |
| 1373 | * |
| 1374 | * There are a small number (~10) of cache chunks per device so that we don't |
| 1375 | * need a very intelligent search. |
| 1376 | */ |
| 1377 | |
| 1378 | static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) |
| 1379 | { |
| 1380 | struct yaffs_dev *dev = obj->my_dev; |
| 1381 | int i; |
| 1382 | struct yaffs_cache *cache; |
| 1383 | int n_caches = obj->my_dev->param.n_caches; |
| 1384 | |
| 1385 | for (i = 0; i < n_caches; i++) { |
| 1386 | cache = &dev->cache[i]; |
| 1387 | if (cache->object == obj && cache->dirty) |
| 1388 | return 1; |
| 1389 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1390 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1391 | return 0; |
| 1392 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1393 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1394 | static void yaffs_flush_file_cache(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1395 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1396 | struct yaffs_dev *dev = obj->my_dev; |
| 1397 | int lowest = -99; /* Stop compiler whining. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1398 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1399 | struct yaffs_cache *cache; |
| 1400 | int chunk_written = 0; |
| 1401 | int n_caches = obj->my_dev->param.n_caches; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1402 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1403 | if (n_caches < 1) |
| 1404 | return; |
| 1405 | do { |
| 1406 | cache = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1407 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1408 | /* Find the lowest dirty chunk for this object */ |
| 1409 | for (i = 0; i < n_caches; i++) { |
| 1410 | if (dev->cache[i].object == obj && |
| 1411 | dev->cache[i].dirty) { |
| 1412 | if (!cache || |
| 1413 | dev->cache[i].chunk_id < lowest) { |
| 1414 | cache = &dev->cache[i]; |
| 1415 | lowest = cache->chunk_id; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1416 | } |
| 1417 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1418 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1419 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1420 | if (cache && !cache->locked) { |
| 1421 | /* Write it out and free it up */ |
| 1422 | chunk_written = |
| 1423 | yaffs_wr_data_obj(cache->object, |
| 1424 | cache->chunk_id, |
| 1425 | cache->data, |
| 1426 | cache->n_bytes, 1); |
| 1427 | cache->dirty = 0; |
| 1428 | cache->object = NULL; |
| 1429 | } |
| 1430 | } while (cache && chunk_written > 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1431 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1432 | if (cache) |
| 1433 | /* Hoosterman, disk full while writing cache out. */ |
| 1434 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 1435 | "yaffs tragedy: no space during cache write"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1436 | } |
| 1437 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1438 | /*yaffs_flush_whole_cache(dev) |
| 1439 | * |
| 1440 | * |
| 1441 | */ |
| 1442 | |
| 1443 | void yaffs_flush_whole_cache(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1444 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1445 | struct yaffs_obj *obj; |
| 1446 | int n_caches = dev->param.n_caches; |
| 1447 | int i; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1448 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1449 | /* Find a dirty object in the cache and flush it... |
| 1450 | * until there are no further dirty objects. |
| 1451 | */ |
| 1452 | do { |
| 1453 | obj = NULL; |
| 1454 | for (i = 0; i < n_caches && !obj; i++) { |
| 1455 | if (dev->cache[i].object && dev->cache[i].dirty) |
| 1456 | obj = dev->cache[i].object; |
| 1457 | } |
| 1458 | if (obj) |
| 1459 | yaffs_flush_file_cache(obj); |
| 1460 | } while (obj); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1461 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1462 | } |
| 1463 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1464 | /* Grab us a cache chunk for use. |
| 1465 | * First look for an empty one. |
| 1466 | * Then look for the least recently used non-dirty one. |
| 1467 | * Then look for the least recently used dirty one...., flush and look again. |
| 1468 | */ |
| 1469 | static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1470 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1471 | int i; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1472 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1473 | if (dev->param.n_caches > 0) { |
| 1474 | for (i = 0; i < dev->param.n_caches; i++) { |
| 1475 | if (!dev->cache[i].object) |
| 1476 | return &dev->cache[i]; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1477 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1478 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1479 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1480 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1481 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1482 | static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1483 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1484 | struct yaffs_cache *cache; |
| 1485 | struct yaffs_obj *the_obj; |
| 1486 | int usage; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1487 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1488 | int pushout; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1489 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1490 | if (dev->param.n_caches < 1) |
| 1491 | return NULL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1492 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1493 | /* Try find a non-dirty one... */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1494 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1495 | cache = yaffs_grab_chunk_worker(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1496 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1497 | if (!cache) { |
| 1498 | /* They were all dirty, find the LRU object and flush |
| 1499 | * its cache, then find again. |
| 1500 | * NB what's here is not very accurate, |
| 1501 | * we actually flush the object with the LRU chunk. |
| 1502 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1503 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1504 | /* With locking we can't assume we can use entry zero, |
| 1505 | * Set the_obj to a valid pointer for Coverity. */ |
| 1506 | the_obj = dev->cache[0].object; |
| 1507 | usage = -1; |
| 1508 | cache = NULL; |
| 1509 | pushout = -1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1510 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1511 | for (i = 0; i < dev->param.n_caches; i++) { |
| 1512 | if (dev->cache[i].object && |
| 1513 | !dev->cache[i].locked && |
| 1514 | (dev->cache[i].last_use < usage || |
| 1515 | !cache)) { |
| 1516 | usage = dev->cache[i].last_use; |
| 1517 | the_obj = dev->cache[i].object; |
| 1518 | cache = &dev->cache[i]; |
| 1519 | pushout = i; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1520 | } |
| 1521 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1522 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1523 | if (!cache || cache->dirty) { |
| 1524 | /* Flush and try again */ |
| 1525 | yaffs_flush_file_cache(the_obj); |
| 1526 | cache = yaffs_grab_chunk_worker(dev); |
| 1527 | } |
| 1528 | } |
| 1529 | return cache; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1530 | } |
| 1531 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1532 | /* Find a cached chunk */ |
| 1533 | static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, |
| 1534 | int chunk_id) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1535 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1536 | struct yaffs_dev *dev = obj->my_dev; |
| 1537 | int i; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1538 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1539 | if (dev->param.n_caches < 1) |
| 1540 | return NULL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1541 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1542 | for (i = 0; i < dev->param.n_caches; i++) { |
| 1543 | if (dev->cache[i].object == obj && |
| 1544 | dev->cache[i].chunk_id == chunk_id) { |
| 1545 | dev->cache_hits++; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1546 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1547 | return &dev->cache[i]; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1548 | } |
| 1549 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1550 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1551 | } |
| 1552 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1553 | /* Mark the chunk for the least recently used algorithym */ |
| 1554 | static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, |
| 1555 | int is_write) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1556 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1557 | int i; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1558 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1559 | if (dev->param.n_caches < 1) |
| 1560 | return; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1561 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1562 | if (dev->cache_last_use < 0 || |
| 1563 | dev->cache_last_use > 100000000) { |
| 1564 | /* Reset the cache usages */ |
| 1565 | for (i = 1; i < dev->param.n_caches; i++) |
| 1566 | dev->cache[i].last_use = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1567 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1568 | dev->cache_last_use = 0; |
| 1569 | } |
| 1570 | dev->cache_last_use++; |
| 1571 | cache->last_use = dev->cache_last_use; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1572 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1573 | if (is_write) |
| 1574 | cache->dirty = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1575 | } |
| 1576 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1577 | /* Invalidate a single cache page. |
| 1578 | * Do this when a whole page gets written, |
| 1579 | * ie the short cache for this page is no longer valid. |
| 1580 | */ |
| 1581 | static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1582 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1583 | struct yaffs_cache *cache; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1584 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1585 | if (object->my_dev->param.n_caches > 0) { |
| 1586 | cache = yaffs_find_chunk_cache(object, chunk_id); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1587 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1588 | if (cache) |
| 1589 | cache->object = NULL; |
| 1590 | } |
| 1591 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1592 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1593 | /* Invalidate all the cache pages associated with this object |
| 1594 | * Do this whenever ther file is deleted or resized. |
| 1595 | */ |
| 1596 | static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) |
| 1597 | { |
| 1598 | int i; |
| 1599 | struct yaffs_dev *dev = in->my_dev; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1600 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1601 | if (dev->param.n_caches > 0) { |
| 1602 | /* Invalidate it. */ |
| 1603 | for (i = 0; i < dev->param.n_caches; i++) { |
| 1604 | if (dev->cache[i].object == in) |
| 1605 | dev->cache[i].object = NULL; |
| 1606 | } |
| 1607 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1608 | } |
| 1609 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1610 | static void yaffs_unhash_obj(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1611 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1612 | int bucket; |
| 1613 | struct yaffs_dev *dev = obj->my_dev; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1614 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1615 | /* If it is still linked into the bucket list, free from the list */ |
| 1616 | if (!list_empty(&obj->hash_link)) { |
| 1617 | list_del_init(&obj->hash_link); |
| 1618 | bucket = yaffs_hash_fn(obj->obj_id); |
| 1619 | dev->obj_bucket[bucket].count--; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1620 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1621 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1622 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1623 | /* FreeObject frees up a Object and puts it back on the free list */ |
| 1624 | static void yaffs_free_obj(struct yaffs_obj *obj) |
| 1625 | { |
| 1626 | struct yaffs_dev *dev; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1627 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1628 | if (!obj) { |
| 1629 | BUG(); |
| 1630 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1631 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1632 | dev = obj->my_dev; |
| 1633 | yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", |
| 1634 | obj, obj->my_inode); |
| 1635 | if (obj->parent) |
| 1636 | BUG(); |
| 1637 | if (!list_empty(&obj->siblings)) |
| 1638 | BUG(); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1639 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1640 | if (obj->my_inode) { |
| 1641 | /* We're still hooked up to a cached inode. |
| 1642 | * Don't delete now, but mark for later deletion |
| 1643 | */ |
| 1644 | obj->defered_free = 1; |
| 1645 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1646 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1647 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1648 | yaffs_unhash_obj(obj); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1649 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1650 | yaffs_free_raw_obj(dev, obj); |
| 1651 | dev->n_obj--; |
| 1652 | dev->checkpoint_blocks_required = 0; /* force recalculation */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1653 | } |
| 1654 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1655 | void yaffs_handle_defered_free(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1656 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1657 | if (obj->defered_free) |
| 1658 | yaffs_free_obj(obj); |
| 1659 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1660 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1661 | static int yaffs_generic_obj_del(struct yaffs_obj *in) |
| 1662 | { |
| 1663 | /* Iinvalidate the file's data in the cache, without flushing. */ |
| 1664 | yaffs_invalidate_whole_cache(in); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1665 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1666 | if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) { |
| 1667 | /* Move to unlinked directory so we have a deletion record */ |
| 1668 | yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, |
| 1669 | 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1670 | } |
| 1671 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1672 | yaffs_remove_obj_from_dir(in); |
| 1673 | yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); |
| 1674 | in->hdr_chunk = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1675 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1676 | yaffs_free_obj(in); |
| 1677 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1678 | |
| 1679 | } |
| 1680 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1681 | static void yaffs_soft_del_file(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1682 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1683 | if (!obj->deleted || |
| 1684 | obj->variant_type != YAFFS_OBJECT_TYPE_FILE || |
| 1685 | obj->soft_del) |
| 1686 | return; |
| 1687 | |
| 1688 | if (obj->n_data_chunks <= 0) { |
| 1689 | /* Empty file with no duplicate object headers, |
| 1690 | * just delete it immediately */ |
| 1691 | yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top); |
| 1692 | obj->variant.file_variant.top = NULL; |
| 1693 | yaffs_trace(YAFFS_TRACE_TRACING, |
| 1694 | "yaffs: Deleting empty file %d", |
| 1695 | obj->obj_id); |
| 1696 | yaffs_generic_obj_del(obj); |
| 1697 | } else { |
| 1698 | yaffs_soft_del_worker(obj, |
| 1699 | obj->variant.file_variant.top, |
| 1700 | obj->variant. |
| 1701 | file_variant.top_level, 0); |
| 1702 | obj->soft_del = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1703 | } |
| 1704 | } |
| 1705 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1706 | /* Pruning removes any part of the file structure tree that is beyond the |
| 1707 | * bounds of the file (ie that does not point to chunks). |
| 1708 | * |
| 1709 | * A file should only get pruned when its size is reduced. |
| 1710 | * |
| 1711 | * Before pruning, the chunks must be pulled from the tree and the |
| 1712 | * level 0 tnode entries must be zeroed out. |
| 1713 | * Could also use this for file deletion, but that's probably better handled |
| 1714 | * by a special case. |
| 1715 | * |
| 1716 | * This function is recursive. For levels > 0 the function is called again on |
| 1717 | * any sub-tree. For level == 0 we just check if the sub-tree has data. |
| 1718 | * If there is no data in a subtree then it is pruned. |
| 1719 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1720 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1721 | static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, |
| 1722 | struct yaffs_tnode *tn, u32 level, |
| 1723 | int del0) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1724 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1725 | int i; |
| 1726 | int has_data; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1727 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1728 | if (!tn) |
| 1729 | return tn; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1730 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1731 | has_data = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1732 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1733 | if (level > 0) { |
| 1734 | for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { |
| 1735 | if (tn->internal[i]) { |
| 1736 | tn->internal[i] = |
| 1737 | yaffs_prune_worker(dev, |
| 1738 | tn->internal[i], |
| 1739 | level - 1, |
| 1740 | (i == 0) ? del0 : 1); |
| 1741 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1742 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1743 | if (tn->internal[i]) |
| 1744 | has_data++; |
| 1745 | } |
| 1746 | } else { |
| 1747 | int tnode_size_u32 = dev->tnode_size / sizeof(u32); |
| 1748 | u32 *map = (u32 *) tn; |
| 1749 | |
| 1750 | for (i = 0; !has_data && i < tnode_size_u32; i++) { |
| 1751 | if (map[i]) |
| 1752 | has_data++; |
| 1753 | } |
| 1754 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1755 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1756 | if (has_data == 0 && del0) { |
| 1757 | /* Free and return NULL */ |
| 1758 | yaffs_free_tnode(dev, tn); |
| 1759 | tn = NULL; |
| 1760 | } |
| 1761 | return tn; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1762 | } |
| 1763 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1764 | static int yaffs_prune_tree(struct yaffs_dev *dev, |
| 1765 | struct yaffs_file_var *file_struct) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1766 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1767 | int i; |
| 1768 | int has_data; |
| 1769 | int done = 0; |
| 1770 | struct yaffs_tnode *tn; |
| 1771 | |
| 1772 | if (file_struct->top_level < 1) |
| 1773 | return YAFFS_OK; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1774 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1775 | file_struct->top = |
| 1776 | yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1777 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1778 | /* Now we have a tree with all the non-zero branches NULL but |
| 1779 | * the height is the same as it was. |
| 1780 | * Let's see if we can trim internal tnodes to shorten the tree. |
| 1781 | * We can do this if only the 0th element in the tnode is in use |
| 1782 | * (ie all the non-zero are NULL) |
| 1783 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1784 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1785 | while (file_struct->top_level && !done) { |
| 1786 | tn = file_struct->top; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 1787 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1788 | has_data = 0; |
| 1789 | for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { |
| 1790 | if (tn->internal[i]) |
| 1791 | has_data++; |
| 1792 | } |
| 1793 | |
| 1794 | if (!has_data) { |
| 1795 | file_struct->top = tn->internal[0]; |
| 1796 | file_struct->top_level--; |
| 1797 | yaffs_free_tnode(dev, tn); |
| 1798 | } else { |
| 1799 | done = 1; |
| 1800 | } |
| 1801 | } |
| 1802 | |
| 1803 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1804 | } |
| 1805 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1806 | /*-------------------- End of File Structure functions.-------------------*/ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1807 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1808 | /* alloc_empty_obj gets us a clean Object.*/ |
| 1809 | static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1810 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1811 | struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1812 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1813 | if (!obj) |
| 1814 | return obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1815 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1816 | dev->n_obj++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1817 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1818 | /* Now sweeten it up... */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1819 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1820 | memset(obj, 0, sizeof(struct yaffs_obj)); |
| 1821 | obj->being_created = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1822 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1823 | obj->my_dev = dev; |
| 1824 | obj->hdr_chunk = 0; |
| 1825 | obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; |
| 1826 | INIT_LIST_HEAD(&(obj->hard_links)); |
| 1827 | INIT_LIST_HEAD(&(obj->hash_link)); |
| 1828 | INIT_LIST_HEAD(&obj->siblings); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1829 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1830 | /* Now make the directory sane */ |
| 1831 | if (dev->root_dir) { |
| 1832 | obj->parent = dev->root_dir; |
| 1833 | list_add(&(obj->siblings), |
| 1834 | &dev->root_dir->variant.dir_variant.children); |
| 1835 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1836 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1837 | /* Add it to the lost and found directory. |
| 1838 | * NB Can't put root or lost-n-found in lost-n-found so |
| 1839 | * check if lost-n-found exists first |
| 1840 | */ |
| 1841 | if (dev->lost_n_found) |
| 1842 | yaffs_add_obj_to_dir(dev->lost_n_found, obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1843 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1844 | obj->being_created = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1845 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1846 | dev->checkpoint_blocks_required = 0; /* force recalculation */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1847 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1848 | return obj; |
| 1849 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1850 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1851 | static int yaffs_find_nice_bucket(struct yaffs_dev *dev) |
| 1852 | { |
| 1853 | int i; |
| 1854 | int l = 999; |
| 1855 | int lowest = 999999; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1856 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1857 | /* Search for the shortest list or one that |
| 1858 | * isn't too long. |
| 1859 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1860 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1861 | for (i = 0; i < 10 && lowest > 4; i++) { |
| 1862 | dev->bucket_finder++; |
| 1863 | dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; |
| 1864 | if (dev->obj_bucket[dev->bucket_finder].count < lowest) { |
| 1865 | lowest = dev->obj_bucket[dev->bucket_finder].count; |
| 1866 | l = dev->bucket_finder; |
| 1867 | } |
| 1868 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1869 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1870 | return l; |
| 1871 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1872 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1873 | static int yaffs_new_obj_id(struct yaffs_dev *dev) |
| 1874 | { |
| 1875 | int bucket = yaffs_find_nice_bucket(dev); |
| 1876 | int found = 0; |
| 1877 | struct list_head *i; |
| 1878 | u32 n = (u32) bucket; |
| 1879 | |
| 1880 | /* Now find an object value that has not already been taken |
| 1881 | * by scanning the list. |
| 1882 | */ |
| 1883 | |
| 1884 | while (!found) { |
| 1885 | found = 1; |
| 1886 | n += YAFFS_NOBJECT_BUCKETS; |
| 1887 | if (1 || dev->obj_bucket[bucket].count > 0) { |
| 1888 | list_for_each(i, &dev->obj_bucket[bucket].list) { |
| 1889 | /* If there is already one in the list */ |
| 1890 | if (i && list_entry(i, struct yaffs_obj, |
| 1891 | hash_link)->obj_id == n) { |
| 1892 | found = 0; |
| 1893 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1894 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1895 | } |
| 1896 | } |
| 1897 | return n; |
| 1898 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1899 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1900 | static void yaffs_hash_obj(struct yaffs_obj *in) |
| 1901 | { |
| 1902 | int bucket = yaffs_hash_fn(in->obj_id); |
| 1903 | struct yaffs_dev *dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1904 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1905 | list_add(&in->hash_link, &dev->obj_bucket[bucket].list); |
| 1906 | dev->obj_bucket[bucket].count++; |
| 1907 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1908 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1909 | struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) |
| 1910 | { |
| 1911 | int bucket = yaffs_hash_fn(number); |
| 1912 | struct list_head *i; |
| 1913 | struct yaffs_obj *in; |
| 1914 | |
| 1915 | list_for_each(i, &dev->obj_bucket[bucket].list) { |
| 1916 | /* Look if it is in the list */ |
| 1917 | in = list_entry(i, struct yaffs_obj, hash_link); |
| 1918 | if (in->obj_id == number) { |
| 1919 | /* Don't show if it is defered free */ |
| 1920 | if (in->defered_free) |
| 1921 | return NULL; |
| 1922 | return in; |
| 1923 | } |
| 1924 | } |
| 1925 | |
| 1926 | return NULL; |
| 1927 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1928 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1929 | struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, |
| 1930 | enum yaffs_obj_type type) |
| 1931 | { |
| 1932 | struct yaffs_obj *the_obj = NULL; |
| 1933 | struct yaffs_tnode *tn = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1934 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1935 | if (number < 0) |
| 1936 | number = yaffs_new_obj_id(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1937 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1938 | if (type == YAFFS_OBJECT_TYPE_FILE) { |
| 1939 | tn = yaffs_get_tnode(dev); |
| 1940 | if (!tn) |
| 1941 | return NULL; |
| 1942 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1943 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1944 | the_obj = yaffs_alloc_empty_obj(dev); |
| 1945 | if (!the_obj) { |
| 1946 | if (tn) |
| 1947 | yaffs_free_tnode(dev, tn); |
| 1948 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1949 | } |
| 1950 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1951 | the_obj->fake = 0; |
| 1952 | the_obj->rename_allowed = 1; |
| 1953 | the_obj->unlink_allowed = 1; |
| 1954 | the_obj->obj_id = number; |
| 1955 | yaffs_hash_obj(the_obj); |
| 1956 | the_obj->variant_type = type; |
| 1957 | yaffs_load_current_time(the_obj, 1, 1); |
| 1958 | |
| 1959 | switch (type) { |
| 1960 | case YAFFS_OBJECT_TYPE_FILE: |
| 1961 | the_obj->variant.file_variant.file_size = 0; |
| 1962 | the_obj->variant.file_variant.scanned_size = 0; |
| 1963 | the_obj->variant.file_variant.shrink_size = |
| 1964 | yaffs_max_file_size(dev); |
| 1965 | the_obj->variant.file_variant.top_level = 0; |
| 1966 | the_obj->variant.file_variant.top = tn; |
| 1967 | break; |
| 1968 | case YAFFS_OBJECT_TYPE_DIRECTORY: |
| 1969 | INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); |
| 1970 | INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); |
| 1971 | break; |
| 1972 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 1973 | case YAFFS_OBJECT_TYPE_HARDLINK: |
| 1974 | case YAFFS_OBJECT_TYPE_SPECIAL: |
| 1975 | /* No action required */ |
| 1976 | break; |
| 1977 | case YAFFS_OBJECT_TYPE_UNKNOWN: |
| 1978 | /* todo this should not happen */ |
| 1979 | break; |
| 1980 | } |
| 1981 | return the_obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1982 | } |
| 1983 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1984 | static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, |
| 1985 | int number, u32 mode) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1986 | { |
| 1987 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1988 | struct yaffs_obj *obj = |
| 1989 | yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1990 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1991 | if (!obj) |
| 1992 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 1993 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 1994 | obj->fake = 1; /* it is fake so it might not use NAND */ |
| 1995 | obj->rename_allowed = 0; |
| 1996 | obj->unlink_allowed = 0; |
| 1997 | obj->deleted = 0; |
| 1998 | obj->unlinked = 0; |
| 1999 | obj->yst_mode = mode; |
| 2000 | obj->my_dev = dev; |
| 2001 | obj->hdr_chunk = 0; /* Not a valid chunk. */ |
| 2002 | return obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2003 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2004 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2005 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2006 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2007 | static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) |
| 2008 | { |
| 2009 | int i; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2010 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2011 | dev->n_obj = 0; |
| 2012 | dev->n_tnodes = 0; |
| 2013 | yaffs_init_raw_tnodes_and_objs(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2014 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2015 | for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { |
| 2016 | INIT_LIST_HEAD(&dev->obj_bucket[i].list); |
| 2017 | dev->obj_bucket[i].count = 0; |
| 2018 | } |
| 2019 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2020 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2021 | struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, |
| 2022 | int number, |
| 2023 | enum yaffs_obj_type type) |
| 2024 | { |
| 2025 | struct yaffs_obj *the_obj = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2026 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2027 | if (number > 0) |
| 2028 | the_obj = yaffs_find_by_number(dev, number); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2029 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2030 | if (!the_obj) |
| 2031 | the_obj = yaffs_new_obj(dev, number, type); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2032 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2033 | return the_obj; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2034 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2035 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2036 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2037 | YCHAR *yaffs_clone_str(const YCHAR *str) |
| 2038 | { |
| 2039 | YCHAR *new_str = NULL; |
| 2040 | int len; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2041 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2042 | if (!str) |
| 2043 | str = _Y(""); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2044 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2045 | len = yaffs_strnlen(str, YAFFS_MAX_ALIAS_LENGTH); |
| 2046 | new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); |
| 2047 | if (new_str) { |
| 2048 | yaffs_strncpy(new_str, str, len); |
| 2049 | new_str[len] = 0; |
| 2050 | } |
| 2051 | return new_str; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2052 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2053 | } |
| 2054 | /* |
| 2055 | *yaffs_update_parent() handles fixing a directories mtime and ctime when a new |
| 2056 | * link (ie. name) is created or deleted in the directory. |
| 2057 | * |
| 2058 | * ie. |
| 2059 | * create dir/a : update dir's mtime/ctime |
| 2060 | * rm dir/a: update dir's mtime/ctime |
| 2061 | * modify dir/a: don't update dir's mtimme/ctime |
| 2062 | * |
| 2063 | * This can be handled immediately or defered. Defering helps reduce the number |
| 2064 | * of updates when many files in a directory are changed within a brief period. |
| 2065 | * |
| 2066 | * If the directory updating is defered then yaffs_update_dirty_dirs must be |
| 2067 | * called periodically. |
| 2068 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2069 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2070 | static void yaffs_update_parent(struct yaffs_obj *obj) |
| 2071 | { |
| 2072 | struct yaffs_dev *dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2073 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2074 | if (!obj) |
| 2075 | return; |
| 2076 | dev = obj->my_dev; |
| 2077 | obj->dirty = 1; |
| 2078 | yaffs_load_current_time(obj, 0, 1); |
| 2079 | if (dev->param.defered_dir_update) { |
| 2080 | struct list_head *link = &obj->variant.dir_variant.dirty; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2081 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2082 | if (list_empty(link)) { |
| 2083 | list_add(link, &dev->dirty_dirs); |
| 2084 | yaffs_trace(YAFFS_TRACE_BACKGROUND, |
| 2085 | "Added object %d to dirty directories", |
| 2086 | obj->obj_id); |
| 2087 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2088 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2089 | } else { |
| 2090 | yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); |
| 2091 | } |
| 2092 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2093 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2094 | void yaffs_update_dirty_dirs(struct yaffs_dev *dev) |
| 2095 | { |
| 2096 | struct list_head *link; |
| 2097 | struct yaffs_obj *obj; |
| 2098 | struct yaffs_dir_var *d_s; |
| 2099 | union yaffs_obj_var *o_v; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2100 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2101 | yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2102 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2103 | while (!list_empty(&dev->dirty_dirs)) { |
| 2104 | link = dev->dirty_dirs.next; |
| 2105 | list_del_init(link); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2106 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2107 | d_s = list_entry(link, struct yaffs_dir_var, dirty); |
| 2108 | o_v = list_entry(d_s, union yaffs_obj_var, dir_variant); |
| 2109 | obj = list_entry(o_v, struct yaffs_obj, variant); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2110 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2111 | yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", |
| 2112 | obj->obj_id); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2113 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2114 | if (obj->dirty) |
| 2115 | yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); |
| 2116 | } |
| 2117 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2118 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2119 | /* |
| 2120 | * Mknod (create) a new object. |
| 2121 | * equiv_obj only has meaning for a hard link; |
| 2122 | * alias_str only has meaning for a symlink. |
| 2123 | * rdev only has meaning for devices (a subset of special objects) |
| 2124 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2125 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2126 | static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type, |
| 2127 | struct yaffs_obj *parent, |
| 2128 | const YCHAR *name, |
| 2129 | u32 mode, |
| 2130 | u32 uid, |
| 2131 | u32 gid, |
| 2132 | struct yaffs_obj *equiv_obj, |
| 2133 | const YCHAR *alias_str, u32 rdev) |
| 2134 | { |
| 2135 | struct yaffs_obj *in; |
| 2136 | YCHAR *str = NULL; |
| 2137 | struct yaffs_dev *dev = parent->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2138 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2139 | /* Check if the entry exists. |
| 2140 | * If it does then fail the call since we don't want a dup. */ |
| 2141 | if (yaffs_find_by_name(parent, name)) |
| 2142 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2143 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2144 | if (type == YAFFS_OBJECT_TYPE_SYMLINK) { |
| 2145 | str = yaffs_clone_str(alias_str); |
| 2146 | if (!str) |
| 2147 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2148 | } |
| 2149 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2150 | in = yaffs_new_obj(dev, -1, type); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2151 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2152 | if (!in) { |
| 2153 | kfree(str); |
| 2154 | return NULL; |
| 2155 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2156 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2157 | in->hdr_chunk = 0; |
| 2158 | in->valid = 1; |
| 2159 | in->variant_type = type; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2160 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2161 | in->yst_mode = mode; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2162 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2163 | yaffs_attribs_init(in, gid, uid, rdev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2164 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2165 | in->n_data_chunks = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2166 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2167 | yaffs_set_obj_name(in, name); |
| 2168 | in->dirty = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2169 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2170 | yaffs_add_obj_to_dir(parent, in); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2171 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2172 | in->my_dev = parent->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2173 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2174 | switch (type) { |
| 2175 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 2176 | in->variant.symlink_variant.alias = str; |
| 2177 | break; |
| 2178 | case YAFFS_OBJECT_TYPE_HARDLINK: |
| 2179 | in->variant.hardlink_variant.equiv_obj = equiv_obj; |
| 2180 | in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id; |
| 2181 | list_add(&in->hard_links, &equiv_obj->hard_links); |
| 2182 | break; |
| 2183 | case YAFFS_OBJECT_TYPE_FILE: |
| 2184 | case YAFFS_OBJECT_TYPE_DIRECTORY: |
| 2185 | case YAFFS_OBJECT_TYPE_SPECIAL: |
| 2186 | case YAFFS_OBJECT_TYPE_UNKNOWN: |
| 2187 | /* do nothing */ |
| 2188 | break; |
| 2189 | } |
| 2190 | |
| 2191 | if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { |
| 2192 | /* Could not create the object header, fail */ |
| 2193 | yaffs_del_obj(in); |
| 2194 | in = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2195 | } |
| 2196 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2197 | if (in) |
| 2198 | yaffs_update_parent(parent); |
| 2199 | |
| 2200 | return in; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2201 | } |
| 2202 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2203 | struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, |
| 2204 | const YCHAR *name, u32 mode, u32 uid, |
| 2205 | u32 gid) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2206 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2207 | return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, |
| 2208 | uid, gid, NULL, NULL, 0); |
| 2209 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2210 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2211 | struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, |
| 2212 | u32 mode, u32 uid, u32 gid) |
| 2213 | { |
| 2214 | return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, |
| 2215 | mode, uid, gid, NULL, NULL, 0); |
| 2216 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2217 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2218 | struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, |
| 2219 | const YCHAR *name, u32 mode, u32 uid, |
| 2220 | u32 gid, u32 rdev) |
| 2221 | { |
| 2222 | return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, |
| 2223 | uid, gid, NULL, NULL, rdev); |
| 2224 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2225 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2226 | struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, |
| 2227 | const YCHAR *name, u32 mode, u32 uid, |
| 2228 | u32 gid, const YCHAR *alias) |
| 2229 | { |
| 2230 | return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, |
| 2231 | uid, gid, NULL, alias, 0); |
| 2232 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2233 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2234 | /* yaffs_link_obj returns the object id of the equivalent object.*/ |
| 2235 | struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, |
| 2236 | struct yaffs_obj *equiv_obj) |
| 2237 | { |
| 2238 | /* Get the real object in case we were fed a hard link obj */ |
| 2239 | equiv_obj = yaffs_get_equivalent_obj(equiv_obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2240 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2241 | if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK, |
| 2242 | parent, name, 0, 0, 0, |
| 2243 | equiv_obj, NULL, 0)) |
| 2244 | return equiv_obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2245 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2246 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2247 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2248 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2249 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2250 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2251 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2252 | /*---------------------- Block Management and Page Allocation -------------*/ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2253 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2254 | static void yaffs_deinit_blocks(struct yaffs_dev *dev) |
| 2255 | { |
| 2256 | if (dev->block_info_alt && dev->block_info) |
| 2257 | vfree(dev->block_info); |
| 2258 | else |
| 2259 | kfree(dev->block_info); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2260 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2261 | dev->block_info_alt = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2262 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2263 | dev->block_info = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2264 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2265 | if (dev->chunk_bits_alt && dev->chunk_bits) |
| 2266 | vfree(dev->chunk_bits); |
| 2267 | else |
| 2268 | kfree(dev->chunk_bits); |
| 2269 | dev->chunk_bits_alt = 0; |
| 2270 | dev->chunk_bits = NULL; |
| 2271 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2272 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2273 | static int yaffs_init_blocks(struct yaffs_dev *dev) |
| 2274 | { |
| 2275 | int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2276 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2277 | dev->block_info = NULL; |
| 2278 | dev->chunk_bits = NULL; |
| 2279 | dev->alloc_block = -1; /* force it to get a new one */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2280 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2281 | /* If the first allocation strategy fails, thry the alternate one */ |
| 2282 | dev->block_info = |
| 2283 | kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); |
| 2284 | if (!dev->block_info) { |
| 2285 | dev->block_info = |
| 2286 | vmalloc(n_blocks * sizeof(struct yaffs_block_info)); |
| 2287 | dev->block_info_alt = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2288 | } else { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2289 | dev->block_info_alt = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2290 | } |
| 2291 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2292 | if (!dev->block_info) |
| 2293 | goto alloc_error; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2294 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2295 | /* Set up dynamic blockinfo stuff. Round up bytes. */ |
| 2296 | dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; |
| 2297 | dev->chunk_bits = |
| 2298 | kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); |
| 2299 | if (!dev->chunk_bits) { |
| 2300 | dev->chunk_bits = |
| 2301 | vmalloc(dev->chunk_bit_stride * n_blocks); |
| 2302 | dev->chunk_bits_alt = 1; |
| 2303 | } else { |
| 2304 | dev->chunk_bits_alt = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2305 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2306 | if (!dev->chunk_bits) |
| 2307 | goto alloc_error; |
| 2308 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2309 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2310 | memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info)); |
| 2311 | memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2312 | return YAFFS_OK; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2313 | |
| 2314 | alloc_error: |
| 2315 | yaffs_deinit_blocks(dev); |
| 2316 | return YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2317 | } |
| 2318 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2319 | |
| 2320 | void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2321 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2322 | struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); |
| 2323 | int erased_ok = 0; |
| 2324 | int i; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2325 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2326 | /* If the block is still healthy erase it and mark as clean. |
| 2327 | * If the block has had a data failure, then retire it. |
| 2328 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2329 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2330 | yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, |
| 2331 | "yaffs_block_became_dirty block %d state %d %s", |
| 2332 | block_no, bi->block_state, |
| 2333 | (bi->needs_retiring) ? "needs retiring" : ""); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2334 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2335 | yaffs2_clear_oldest_dirty_seq(dev, bi); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2336 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2337 | bi->block_state = YAFFS_BLOCK_STATE_DIRTY; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2338 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2339 | /* If this is the block being garbage collected then stop gc'ing */ |
| 2340 | if (block_no == dev->gc_block) |
| 2341 | dev->gc_block = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2342 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2343 | /* If this block is currently the best candidate for gc |
| 2344 | * then drop as a candidate */ |
| 2345 | if (block_no == dev->gc_dirtiest) { |
| 2346 | dev->gc_dirtiest = 0; |
| 2347 | dev->gc_pages_in_use = 0; |
| 2348 | } |
| 2349 | |
| 2350 | if (!bi->needs_retiring) { |
| 2351 | yaffs2_checkpt_invalidate(dev); |
| 2352 | erased_ok = yaffs_erase_block(dev, block_no); |
| 2353 | if (!erased_ok) { |
| 2354 | dev->n_erase_failures++; |
| 2355 | yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, |
| 2356 | "**>> Erasure failed %d", block_no); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2357 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2358 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2359 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2360 | /* Verify erasure if needed */ |
| 2361 | if (erased_ok && |
| 2362 | ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || |
| 2363 | !yaffs_skip_verification(dev))) { |
| 2364 | for (i = 0; i < dev->param.chunks_per_block; i++) { |
| 2365 | if (!yaffs_check_chunk_erased(dev, |
| 2366 | block_no * dev->param.chunks_per_block + i)) { |
| 2367 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 2368 | ">>Block %d erasure supposedly OK, but chunk %d not erased", |
| 2369 | block_no, i); |
| 2370 | } |
| 2371 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2372 | } |
| 2373 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2374 | if (!erased_ok) { |
| 2375 | /* We lost a block of free space */ |
| 2376 | dev->n_free_chunks -= dev->param.chunks_per_block; |
| 2377 | yaffs_retire_block(dev, block_no); |
| 2378 | yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, |
| 2379 | "**>> Block %d retired", block_no); |
| 2380 | return; |
| 2381 | } |
| 2382 | |
| 2383 | /* Clean it up... */ |
| 2384 | bi->block_state = YAFFS_BLOCK_STATE_EMPTY; |
| 2385 | bi->seq_number = 0; |
| 2386 | dev->n_erased_blocks++; |
| 2387 | bi->pages_in_use = 0; |
| 2388 | bi->soft_del_pages = 0; |
| 2389 | bi->has_shrink_hdr = 0; |
| 2390 | bi->skip_erased_check = 1; /* Clean, so no need to check */ |
| 2391 | bi->gc_prioritise = 0; |
| 2392 | bi->has_summary = 0; |
| 2393 | |
| 2394 | yaffs_clear_chunk_bits(dev, block_no); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2395 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2396 | yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2397 | } |
| 2398 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2399 | static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev, |
| 2400 | struct yaffs_block_info *bi, |
| 2401 | int old_chunk, u8 *buffer) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2402 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2403 | int new_chunk; |
| 2404 | int mark_flash = 1; |
| 2405 | struct yaffs_ext_tags tags; |
| 2406 | struct yaffs_obj *object; |
| 2407 | int matching_chunk; |
| 2408 | int ret_val = YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2409 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2410 | memset(&tags, 0, sizeof(tags)); |
| 2411 | yaffs_rd_chunk_tags_nand(dev, old_chunk, |
| 2412 | buffer, &tags); |
| 2413 | object = yaffs_find_by_number(dev, tags.obj_id); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2414 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2415 | yaffs_trace(YAFFS_TRACE_GC_DETAIL, |
| 2416 | "Collecting chunk in block %d, %d %d %d ", |
| 2417 | dev->gc_chunk, tags.obj_id, |
| 2418 | tags.chunk_id, tags.n_bytes); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2419 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2420 | if (object && !yaffs_skip_verification(dev)) { |
| 2421 | if (tags.chunk_id == 0) |
| 2422 | matching_chunk = |
| 2423 | object->hdr_chunk; |
| 2424 | else if (object->soft_del) |
| 2425 | /* Defeat the test */ |
| 2426 | matching_chunk = old_chunk; |
| 2427 | else |
| 2428 | matching_chunk = |
| 2429 | yaffs_find_chunk_in_file |
| 2430 | (object, tags.chunk_id, |
| 2431 | NULL); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2432 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2433 | if (old_chunk != matching_chunk) |
| 2434 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 2435 | "gc: page in gc mismatch: %d %d %d %d", |
| 2436 | old_chunk, |
| 2437 | matching_chunk, |
| 2438 | tags.obj_id, |
| 2439 | tags.chunk_id); |
| 2440 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2441 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2442 | if (!object) { |
| 2443 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 2444 | "page %d in gc has no object: %d %d %d ", |
| 2445 | old_chunk, |
| 2446 | tags.obj_id, tags.chunk_id, |
| 2447 | tags.n_bytes); |
| 2448 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2449 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2450 | if (object && |
| 2451 | object->deleted && |
| 2452 | object->soft_del && tags.chunk_id != 0) { |
| 2453 | /* Data chunk in a soft deleted file, |
| 2454 | * throw it away. |
| 2455 | * It's a soft deleted data chunk, |
| 2456 | * No need to copy this, just forget |
| 2457 | * about it and fix up the object. |
| 2458 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2459 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2460 | /* Free chunks already includes |
| 2461 | * softdeleted chunks, how ever this |
| 2462 | * chunk is going to soon be really |
| 2463 | * deleted which will increment free |
| 2464 | * chunks. We have to decrement free |
| 2465 | * chunks so this works out properly. |
| 2466 | */ |
| 2467 | dev->n_free_chunks--; |
| 2468 | bi->soft_del_pages--; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2469 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2470 | object->n_data_chunks--; |
| 2471 | if (object->n_data_chunks <= 0) { |
| 2472 | /* remeber to clean up obj */ |
| 2473 | dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id; |
| 2474 | dev->n_clean_ups++; |
| 2475 | } |
| 2476 | mark_flash = 0; |
| 2477 | } else if (object) { |
| 2478 | /* It's either a data chunk in a live |
| 2479 | * file or an ObjectHeader, so we're |
| 2480 | * interested in it. |
| 2481 | * NB Need to keep the ObjectHeaders of |
| 2482 | * deleted files until the whole file |
| 2483 | * has been deleted off |
| 2484 | */ |
| 2485 | tags.serial_number++; |
| 2486 | dev->n_gc_copies++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2487 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2488 | if (tags.chunk_id == 0) { |
| 2489 | /* It is an object Id, |
| 2490 | * We need to nuke the |
| 2491 | * shrinkheader flags since its |
| 2492 | * work is done. |
| 2493 | * Also need to clean up |
| 2494 | * shadowing. |
| 2495 | */ |
| 2496 | struct yaffs_obj_hdr *oh; |
| 2497 | oh = (struct yaffs_obj_hdr *) buffer; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2498 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2499 | oh->is_shrink = 0; |
| 2500 | tags.extra_is_shrink = 0; |
| 2501 | oh->shadows_obj = 0; |
| 2502 | oh->inband_shadowed_obj_id = 0; |
| 2503 | tags.extra_shadows = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2504 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2505 | /* Update file size */ |
| 2506 | if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) { |
| 2507 | yaffs_oh_size_load(oh, |
| 2508 | object->variant.file_variant.file_size); |
| 2509 | tags.extra_file_size = |
| 2510 | object->variant.file_variant.file_size; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2511 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2512 | |
| 2513 | yaffs_verify_oh(object, oh, &tags, 1); |
| 2514 | new_chunk = |
| 2515 | yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2516 | } else { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2517 | new_chunk = |
| 2518 | yaffs_write_new_chunk(dev, buffer, &tags, 1); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2519 | } |
| 2520 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2521 | if (new_chunk < 0) { |
| 2522 | ret_val = YAFFS_FAIL; |
| 2523 | } else { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2524 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2525 | /* Now fix up the Tnodes etc. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2526 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2527 | if (tags.chunk_id == 0) { |
| 2528 | /* It's a header */ |
| 2529 | object->hdr_chunk = new_chunk; |
| 2530 | object->serial = tags.serial_number; |
| 2531 | } else { |
| 2532 | /* It's a data chunk */ |
| 2533 | yaffs_put_chunk_in_file(object, tags.chunk_id, |
| 2534 | new_chunk, 0); |
| 2535 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2536 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2537 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2538 | if (ret_val == YAFFS_OK) |
| 2539 | yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__); |
| 2540 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2541 | } |
| 2542 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2543 | static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2544 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2545 | int old_chunk; |
| 2546 | int ret_val = YAFFS_OK; |
| 2547 | int i; |
| 2548 | int is_checkpt_block; |
| 2549 | int max_copies; |
| 2550 | int chunks_before = yaffs_get_erased_chunks(dev); |
| 2551 | int chunks_after; |
| 2552 | struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2553 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2554 | is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2555 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2556 | yaffs_trace(YAFFS_TRACE_TRACING, |
| 2557 | "Collecting block %d, in use %d, shrink %d, whole_block %d", |
| 2558 | block, bi->pages_in_use, bi->has_shrink_hdr, |
| 2559 | whole_block); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2560 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2561 | /*yaffs_verify_free_chunks(dev); */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2562 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2563 | if (bi->block_state == YAFFS_BLOCK_STATE_FULL) |
| 2564 | bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2565 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2566 | bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2567 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2568 | dev->gc_disable = 1; |
| 2569 | |
| 2570 | yaffs_summary_gc(dev, block); |
| 2571 | |
| 2572 | if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { |
| 2573 | yaffs_trace(YAFFS_TRACE_TRACING, |
| 2574 | "Collecting block %d that has no chunks in use", |
| 2575 | block); |
| 2576 | yaffs_block_became_dirty(dev, block); |
| 2577 | } else { |
| 2578 | |
| 2579 | u8 *buffer = yaffs_get_temp_buffer(dev); |
| 2580 | |
| 2581 | yaffs_verify_blk(dev, bi, block); |
| 2582 | |
| 2583 | max_copies = (whole_block) ? dev->param.chunks_per_block : 5; |
| 2584 | old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; |
| 2585 | |
| 2586 | for (/* init already done */ ; |
| 2587 | ret_val == YAFFS_OK && |
| 2588 | dev->gc_chunk < dev->param.chunks_per_block && |
| 2589 | (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && |
| 2590 | max_copies > 0; |
| 2591 | dev->gc_chunk++, old_chunk++) { |
| 2592 | if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { |
| 2593 | /* Page is in use and might need to be copied */ |
| 2594 | max_copies--; |
| 2595 | ret_val = yaffs_gc_process_chunk(dev, bi, |
| 2596 | old_chunk, buffer); |
| 2597 | } |
| 2598 | } |
| 2599 | yaffs_release_temp_buffer(dev, buffer); |
| 2600 | } |
| 2601 | |
| 2602 | yaffs_verify_collected_blk(dev, bi, block); |
| 2603 | |
| 2604 | if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { |
| 2605 | /* |
| 2606 | * The gc did not complete. Set block state back to FULL |
| 2607 | * because checkpointing does not restore gc. |
| 2608 | */ |
| 2609 | bi->block_state = YAFFS_BLOCK_STATE_FULL; |
| 2610 | } else { |
| 2611 | /* The gc completed. */ |
| 2612 | /* Do any required cleanups */ |
| 2613 | for (i = 0; i < dev->n_clean_ups; i++) { |
| 2614 | /* Time to delete the file too */ |
| 2615 | struct yaffs_obj *object = |
| 2616 | yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); |
| 2617 | if (object) { |
| 2618 | yaffs_free_tnode(dev, |
| 2619 | object->variant.file_variant.top); |
| 2620 | object->variant.file_variant.top = NULL; |
| 2621 | yaffs_trace(YAFFS_TRACE_GC, |
| 2622 | "yaffs: About to finally delete object %d", |
| 2623 | object->obj_id); |
| 2624 | yaffs_generic_obj_del(object); |
| 2625 | object->my_dev->n_deleted_files--; |
| 2626 | } |
| 2627 | |
| 2628 | } |
| 2629 | chunks_after = yaffs_get_erased_chunks(dev); |
| 2630 | if (chunks_before >= chunks_after) |
| 2631 | yaffs_trace(YAFFS_TRACE_GC, |
| 2632 | "gc did not increase free chunks before %d after %d", |
| 2633 | chunks_before, chunks_after); |
| 2634 | dev->gc_block = 0; |
| 2635 | dev->gc_chunk = 0; |
| 2636 | dev->n_clean_ups = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2637 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2638 | |
| 2639 | dev->gc_disable = 0; |
| 2640 | |
| 2641 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2642 | } |
| 2643 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2644 | /* |
| 2645 | * find_gc_block() selects the dirtiest block (or close enough) |
| 2646 | * for garbage collection. |
| 2647 | */ |
| 2648 | |
| 2649 | static unsigned yaffs_find_gc_block(struct yaffs_dev *dev, |
| 2650 | int aggressive, int background) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2651 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2652 | int i; |
| 2653 | int iterations; |
| 2654 | unsigned selected = 0; |
| 2655 | int prioritised = 0; |
| 2656 | int prioritised_exist = 0; |
| 2657 | struct yaffs_block_info *bi; |
| 2658 | int threshold; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2659 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2660 | /* First let's see if we need to grab a prioritised block */ |
| 2661 | if (dev->has_pending_prioritised_gc && !aggressive) { |
| 2662 | dev->gc_dirtiest = 0; |
| 2663 | bi = dev->block_info; |
| 2664 | for (i = dev->internal_start_block; |
| 2665 | i <= dev->internal_end_block && !selected; i++) { |
| 2666 | |
| 2667 | if (bi->gc_prioritise) { |
| 2668 | prioritised_exist = 1; |
| 2669 | if (bi->block_state == YAFFS_BLOCK_STATE_FULL && |
| 2670 | yaffs_block_ok_for_gc(dev, bi)) { |
| 2671 | selected = i; |
| 2672 | prioritised = 1; |
| 2673 | } |
| 2674 | } |
| 2675 | bi++; |
| 2676 | } |
| 2677 | |
| 2678 | /* |
| 2679 | * If there is a prioritised block and none was selected then |
| 2680 | * this happened because there is at least one old dirty block |
| 2681 | * gumming up the works. Let's gc the oldest dirty block. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2682 | */ |
| 2683 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2684 | if (prioritised_exist && |
| 2685 | !selected && dev->oldest_dirty_block > 0) |
| 2686 | selected = dev->oldest_dirty_block; |
| 2687 | |
| 2688 | if (!prioritised_exist) /* None found, so we can clear this */ |
| 2689 | dev->has_pending_prioritised_gc = 0; |
| 2690 | } |
| 2691 | |
| 2692 | /* If we're doing aggressive GC then we are happy to take a less-dirty |
| 2693 | * block, and search harder. |
| 2694 | * else (leasurely gc), then we only bother to do this if the |
| 2695 | * block has only a few pages in use. |
| 2696 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2697 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2698 | if (!selected) { |
| 2699 | int pages_used; |
| 2700 | int n_blocks = |
| 2701 | dev->internal_end_block - dev->internal_start_block + 1; |
| 2702 | if (aggressive) { |
| 2703 | threshold = dev->param.chunks_per_block; |
| 2704 | iterations = n_blocks; |
| 2705 | } else { |
| 2706 | int max_threshold; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2707 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2708 | if (background) |
| 2709 | max_threshold = dev->param.chunks_per_block / 2; |
| 2710 | else |
| 2711 | max_threshold = dev->param.chunks_per_block / 8; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2712 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2713 | if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) |
| 2714 | max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2715 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2716 | threshold = background ? (dev->gc_not_done + 2) * 2 : 0; |
| 2717 | if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) |
| 2718 | threshold = YAFFS_GC_PASSIVE_THRESHOLD; |
| 2719 | if (threshold > max_threshold) |
| 2720 | threshold = max_threshold; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2721 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2722 | iterations = n_blocks / 16 + 1; |
| 2723 | if (iterations > 100) |
| 2724 | iterations = 100; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2725 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2726 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2727 | for (i = 0; |
| 2728 | i < iterations && |
| 2729 | (dev->gc_dirtiest < 1 || |
| 2730 | dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); |
| 2731 | i++) { |
| 2732 | dev->gc_block_finder++; |
| 2733 | if (dev->gc_block_finder < dev->internal_start_block || |
| 2734 | dev->gc_block_finder > dev->internal_end_block) |
| 2735 | dev->gc_block_finder = |
| 2736 | dev->internal_start_block; |
| 2737 | |
| 2738 | bi = yaffs_get_block_info(dev, dev->gc_block_finder); |
| 2739 | |
| 2740 | pages_used = bi->pages_in_use - bi->soft_del_pages; |
| 2741 | |
| 2742 | if (bi->block_state == YAFFS_BLOCK_STATE_FULL && |
| 2743 | pages_used < dev->param.chunks_per_block && |
| 2744 | (dev->gc_dirtiest < 1 || |
| 2745 | pages_used < dev->gc_pages_in_use) && |
| 2746 | yaffs_block_ok_for_gc(dev, bi)) { |
| 2747 | dev->gc_dirtiest = dev->gc_block_finder; |
| 2748 | dev->gc_pages_in_use = pages_used; |
| 2749 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2750 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2751 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2752 | if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) |
| 2753 | selected = dev->gc_dirtiest; |
| 2754 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2755 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2756 | /* |
| 2757 | * If nothing has been selected for a while, try the oldest dirty |
| 2758 | * because that's gumming up the works. |
| 2759 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2760 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2761 | if (!selected && dev->param.is_yaffs2 && |
| 2762 | dev->gc_not_done >= (background ? 10 : 20)) { |
| 2763 | yaffs2_find_oldest_dirty_seq(dev); |
| 2764 | if (dev->oldest_dirty_block > 0) { |
| 2765 | selected = dev->oldest_dirty_block; |
| 2766 | dev->gc_dirtiest = selected; |
| 2767 | dev->oldest_dirty_gc_count++; |
| 2768 | bi = yaffs_get_block_info(dev, selected); |
| 2769 | dev->gc_pages_in_use = |
| 2770 | bi->pages_in_use - bi->soft_del_pages; |
| 2771 | } else { |
| 2772 | dev->gc_not_done = 0; |
| 2773 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2774 | } |
| 2775 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2776 | if (selected) { |
| 2777 | yaffs_trace(YAFFS_TRACE_GC, |
| 2778 | "GC Selected block %d with %d free, prioritised:%d", |
| 2779 | selected, |
| 2780 | dev->param.chunks_per_block - dev->gc_pages_in_use, |
| 2781 | prioritised); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2782 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2783 | dev->n_gc_blocks++; |
| 2784 | if (background) |
| 2785 | dev->bg_gcs++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2786 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2787 | dev->gc_dirtiest = 0; |
| 2788 | dev->gc_pages_in_use = 0; |
| 2789 | dev->gc_not_done = 0; |
| 2790 | if (dev->refresh_skip > 0) |
| 2791 | dev->refresh_skip--; |
| 2792 | } else { |
| 2793 | dev->gc_not_done++; |
| 2794 | yaffs_trace(YAFFS_TRACE_GC, |
| 2795 | "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", |
| 2796 | dev->gc_block_finder, dev->gc_not_done, threshold, |
| 2797 | dev->gc_dirtiest, dev->gc_pages_in_use, |
| 2798 | dev->oldest_dirty_block, background ? " bg" : ""); |
| 2799 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2800 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2801 | return selected; |
| 2802 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2803 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2804 | /* New garbage collector |
| 2805 | * If we're very low on erased blocks then we do aggressive garbage collection |
| 2806 | * otherwise we do "leasurely" garbage collection. |
| 2807 | * Aggressive gc looks further (whole array) and will accept less dirty blocks. |
| 2808 | * Passive gc only inspects smaller areas and only accepts more dirty blocks. |
| 2809 | * |
| 2810 | * The idea is to help clear out space in a more spread-out manner. |
| 2811 | * Dunno if it really does anything useful. |
| 2812 | */ |
| 2813 | static int yaffs_check_gc(struct yaffs_dev *dev, int background) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2814 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2815 | int aggressive = 0; |
| 2816 | int gc_ok = YAFFS_OK; |
| 2817 | int max_tries = 0; |
| 2818 | int min_erased; |
| 2819 | int erased_chunks; |
| 2820 | int checkpt_block_adjust; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2821 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2822 | if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0) |
| 2823 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2824 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2825 | if (dev->gc_disable) |
| 2826 | /* Bail out so we don't get recursive gc */ |
| 2827 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2828 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2829 | /* This loop should pass the first time. |
| 2830 | * Only loops here if the collection does not increase space. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2831 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2832 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2833 | do { |
| 2834 | max_tries++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2835 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2836 | checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2837 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2838 | min_erased = |
| 2839 | dev->param.n_reserved_blocks + checkpt_block_adjust + 1; |
| 2840 | erased_chunks = |
| 2841 | dev->n_erased_blocks * dev->param.chunks_per_block; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2842 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2843 | /* If we need a block soon then do aggressive gc. */ |
| 2844 | if (dev->n_erased_blocks < min_erased) |
| 2845 | aggressive = 1; |
| 2846 | else { |
| 2847 | if (!background |
| 2848 | && erased_chunks > (dev->n_free_chunks / 4)) |
| 2849 | break; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2850 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2851 | if (dev->gc_skip > 20) |
| 2852 | dev->gc_skip = 20; |
| 2853 | if (erased_chunks < dev->n_free_chunks / 2 || |
| 2854 | dev->gc_skip < 1 || background) |
| 2855 | aggressive = 0; |
| 2856 | else { |
| 2857 | dev->gc_skip--; |
| 2858 | break; |
| 2859 | } |
| 2860 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2861 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2862 | dev->gc_skip = 5; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2863 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2864 | /* If we don't already have a block being gc'd then see if we |
| 2865 | * should start another */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2866 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2867 | if (dev->gc_block < 1 && !aggressive) { |
| 2868 | dev->gc_block = yaffs2_find_refresh_block(dev); |
| 2869 | dev->gc_chunk = 0; |
| 2870 | dev->n_clean_ups = 0; |
| 2871 | } |
| 2872 | if (dev->gc_block < 1) { |
| 2873 | dev->gc_block = |
| 2874 | yaffs_find_gc_block(dev, aggressive, background); |
| 2875 | dev->gc_chunk = 0; |
| 2876 | dev->n_clean_ups = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2877 | } |
| 2878 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2879 | if (dev->gc_block > 0) { |
| 2880 | dev->all_gcs++; |
| 2881 | if (!aggressive) |
| 2882 | dev->passive_gc_count++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2883 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2884 | yaffs_trace(YAFFS_TRACE_GC, |
| 2885 | "yaffs: GC n_erased_blocks %d aggressive %d", |
| 2886 | dev->n_erased_blocks, aggressive); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2887 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2888 | gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); |
| 2889 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2890 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2891 | if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && |
| 2892 | dev->gc_block > 0) { |
| 2893 | yaffs_trace(YAFFS_TRACE_GC, |
| 2894 | "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", |
| 2895 | dev->n_erased_blocks, max_tries, |
| 2896 | dev->gc_block); |
| 2897 | } |
| 2898 | } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && |
| 2899 | (dev->gc_block > 0) && (max_tries < 2)); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2900 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2901 | return aggressive ? gc_ok : YAFFS_OK; |
| 2902 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2903 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2904 | /* |
| 2905 | * yaffs_bg_gc() |
| 2906 | * Garbage collects. Intended to be called from a background thread. |
| 2907 | * Returns non-zero if at least half the free chunks are erased. |
| 2908 | */ |
| 2909 | int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) |
| 2910 | { |
| 2911 | int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2912 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2913 | yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2914 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2915 | yaffs_check_gc(dev, 1); |
| 2916 | return erased_chunks > dev->n_free_chunks / 2; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2917 | } |
| 2918 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2919 | /*-------------------- Data file manipulation -----------------*/ |
| 2920 | |
| 2921 | static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2922 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2923 | int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2924 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2925 | if (nand_chunk >= 0) |
| 2926 | return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, |
| 2927 | buffer, NULL); |
| 2928 | else { |
| 2929 | yaffs_trace(YAFFS_TRACE_NANDACCESS, |
| 2930 | "Chunk %d not found zero instead", |
| 2931 | nand_chunk); |
| 2932 | /* get sane (zero) data if you read a hole */ |
| 2933 | memset(buffer, 0, in->my_dev->data_bytes_per_chunk); |
| 2934 | return 0; |
| 2935 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2936 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2937 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2938 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2939 | void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, |
| 2940 | int lyn) |
| 2941 | { |
| 2942 | int block; |
| 2943 | int page; |
| 2944 | struct yaffs_ext_tags tags; |
| 2945 | struct yaffs_block_info *bi; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2946 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2947 | if (chunk_id <= 0) |
| 2948 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2949 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2950 | dev->n_deletions++; |
| 2951 | block = chunk_id / dev->param.chunks_per_block; |
| 2952 | page = chunk_id % dev->param.chunks_per_block; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2953 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2954 | if (!yaffs_check_chunk_bit(dev, block, page)) |
| 2955 | yaffs_trace(YAFFS_TRACE_VERIFY, |
| 2956 | "Deleting invalid chunk %d", chunk_id); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2957 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2958 | bi = yaffs_get_block_info(dev, block); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 2959 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2960 | yaffs2_update_oldest_dirty_seq(dev, block, bi); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2961 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2962 | yaffs_trace(YAFFS_TRACE_DELETION, |
| 2963 | "line %d delete of chunk %d", |
| 2964 | lyn, chunk_id); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2965 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2966 | if (!dev->param.is_yaffs2 && mark_flash && |
| 2967 | bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2968 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2969 | memset(&tags, 0, sizeof(tags)); |
| 2970 | tags.is_deleted = 1; |
| 2971 | yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); |
| 2972 | yaffs_handle_chunk_update(dev, chunk_id, &tags); |
| 2973 | } else { |
| 2974 | dev->n_unmarked_deletions++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2975 | } |
| 2976 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2977 | /* Pull out of the management area. |
| 2978 | * If the whole block became dirty, this will kick off an erasure. |
| 2979 | */ |
| 2980 | if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || |
| 2981 | bi->block_state == YAFFS_BLOCK_STATE_FULL || |
| 2982 | bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || |
| 2983 | bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { |
| 2984 | dev->n_free_chunks++; |
| 2985 | yaffs_clear_chunk_bit(dev, block, page); |
| 2986 | bi->pages_in_use--; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2987 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2988 | if (bi->pages_in_use == 0 && |
| 2989 | !bi->has_shrink_hdr && |
| 2990 | bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && |
| 2991 | bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) { |
| 2992 | yaffs_block_became_dirty(dev, block); |
| 2993 | } |
| 2994 | } |
| 2995 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 2996 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 2997 | static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, |
| 2998 | const u8 *buffer, int n_bytes, int use_reserve) |
| 2999 | { |
| 3000 | /* Find old chunk Need to do this to get serial number |
| 3001 | * Write new one and patch into tree. |
| 3002 | * Invalidate old tags. |
| 3003 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3004 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3005 | int prev_chunk_id; |
| 3006 | struct yaffs_ext_tags prev_tags; |
| 3007 | int new_chunk_id; |
| 3008 | struct yaffs_ext_tags new_tags; |
| 3009 | struct yaffs_dev *dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3010 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3011 | yaffs_check_gc(dev, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3012 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3013 | /* Get the previous chunk at this location in the file if it exists. |
| 3014 | * If it does not exist then put a zero into the tree. This creates |
| 3015 | * the tnode now, rather than later when it is harder to clean up. |
| 3016 | */ |
| 3017 | prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags); |
| 3018 | if (prev_chunk_id < 1 && |
| 3019 | !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) |
| 3020 | return 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3021 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3022 | /* Set up new tags */ |
| 3023 | memset(&new_tags, 0, sizeof(new_tags)); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3024 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3025 | new_tags.chunk_id = inode_chunk; |
| 3026 | new_tags.obj_id = in->obj_id; |
| 3027 | new_tags.serial_number = |
| 3028 | (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1; |
| 3029 | new_tags.n_bytes = n_bytes; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3030 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3031 | if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { |
| 3032 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 3033 | "Writing %d bytes to chunk!!!!!!!!!", |
| 3034 | n_bytes); |
| 3035 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3036 | } |
| 3037 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3038 | new_chunk_id = |
| 3039 | yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3040 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3041 | if (new_chunk_id > 0) { |
| 3042 | yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3043 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3044 | if (prev_chunk_id > 0) |
| 3045 | yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); |
| 3046 | |
| 3047 | yaffs_verify_file_sane(in); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3048 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3049 | return new_chunk_id; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3050 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3051 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3052 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3053 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3054 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3055 | static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, |
| 3056 | const YCHAR *name, const void *value, int size, |
| 3057 | int flags) |
| 3058 | { |
| 3059 | struct yaffs_xattr_mod xmod; |
| 3060 | int result; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3061 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3062 | xmod.set = set; |
| 3063 | xmod.name = name; |
| 3064 | xmod.data = value; |
| 3065 | xmod.size = size; |
| 3066 | xmod.flags = flags; |
| 3067 | xmod.result = -ENOSPC; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3068 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3069 | result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3070 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3071 | if (result > 0) |
| 3072 | return xmod.result; |
| 3073 | else |
| 3074 | return -ENOSPC; |
| 3075 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3076 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3077 | static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer, |
| 3078 | struct yaffs_xattr_mod *xmod) |
| 3079 | { |
| 3080 | int retval = 0; |
| 3081 | int x_offs = sizeof(struct yaffs_obj_hdr); |
| 3082 | struct yaffs_dev *dev = obj->my_dev; |
| 3083 | int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); |
| 3084 | char *x_buffer = buffer + x_offs; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3085 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3086 | if (xmod->set) |
| 3087 | retval = |
| 3088 | nval_set(x_buffer, x_size, xmod->name, xmod->data, |
| 3089 | xmod->size, xmod->flags); |
| 3090 | else |
| 3091 | retval = nval_del(x_buffer, x_size, xmod->name); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3092 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3093 | obj->has_xattr = nval_hasvalues(x_buffer, x_size); |
| 3094 | obj->xattr_known = 1; |
| 3095 | xmod->result = retval; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3096 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3097 | return retval; |
| 3098 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3099 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3100 | static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name, |
| 3101 | void *value, int size) |
| 3102 | { |
| 3103 | char *buffer = NULL; |
| 3104 | int result; |
| 3105 | struct yaffs_ext_tags tags; |
| 3106 | struct yaffs_dev *dev = obj->my_dev; |
| 3107 | int x_offs = sizeof(struct yaffs_obj_hdr); |
| 3108 | int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); |
| 3109 | char *x_buffer; |
| 3110 | int retval = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3111 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3112 | if (obj->hdr_chunk < 1) |
| 3113 | return -ENODATA; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3114 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3115 | /* If we know that the object has no xattribs then don't do all the |
| 3116 | * reading and parsing. |
| 3117 | */ |
| 3118 | if (obj->xattr_known && !obj->has_xattr) { |
| 3119 | if (name) |
| 3120 | return -ENODATA; |
| 3121 | else |
| 3122 | return 0; |
| 3123 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3124 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3125 | buffer = (char *)yaffs_get_temp_buffer(dev); |
| 3126 | if (!buffer) |
| 3127 | return -ENOMEM; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3128 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3129 | result = |
| 3130 | yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3131 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3132 | if (result != YAFFS_OK) |
| 3133 | retval = -ENOENT; |
| 3134 | else { |
| 3135 | x_buffer = buffer + x_offs; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3136 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3137 | if (!obj->xattr_known) { |
| 3138 | obj->has_xattr = nval_hasvalues(x_buffer, x_size); |
| 3139 | obj->xattr_known = 1; |
| 3140 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3141 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3142 | if (name) |
| 3143 | retval = nval_get(x_buffer, x_size, name, value, size); |
| 3144 | else |
| 3145 | retval = nval_list(x_buffer, x_size, value, size); |
| 3146 | } |
| 3147 | yaffs_release_temp_buffer(dev, (u8 *) buffer); |
| 3148 | return retval; |
| 3149 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3150 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3151 | int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, |
| 3152 | const void *value, int size, int flags) |
| 3153 | { |
| 3154 | return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); |
| 3155 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3156 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3157 | int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) |
| 3158 | { |
| 3159 | return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); |
| 3160 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3161 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3162 | int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, |
| 3163 | int size) |
| 3164 | { |
| 3165 | return yaffs_do_xattrib_fetch(obj, name, value, size); |
| 3166 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3167 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3168 | int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) |
| 3169 | { |
| 3170 | return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); |
| 3171 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3172 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3173 | static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) |
| 3174 | { |
| 3175 | u8 *buf; |
| 3176 | struct yaffs_obj_hdr *oh; |
| 3177 | struct yaffs_dev *dev; |
| 3178 | struct yaffs_ext_tags tags; |
| 3179 | int result; |
| 3180 | int alloc_failed = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3181 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3182 | if (!in || !in->lazy_loaded || in->hdr_chunk < 1) |
| 3183 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3184 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3185 | dev = in->my_dev; |
| 3186 | in->lazy_loaded = 0; |
| 3187 | buf = yaffs_get_temp_buffer(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3188 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3189 | result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags); |
| 3190 | oh = (struct yaffs_obj_hdr *)buf; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3191 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3192 | in->yst_mode = oh->yst_mode; |
| 3193 | yaffs_load_attribs(in, oh); |
| 3194 | yaffs_set_obj_name_from_oh(in, oh); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3195 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3196 | if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { |
| 3197 | in->variant.symlink_variant.alias = |
| 3198 | yaffs_clone_str(oh->alias); |
| 3199 | if (!in->variant.symlink_variant.alias) |
| 3200 | alloc_failed = 1; /* Not returned */ |
| 3201 | } |
| 3202 | yaffs_release_temp_buffer(dev, buf); |
| 3203 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3204 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3205 | static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name, |
| 3206 | const YCHAR *oh_name, int buff_size) |
| 3207 | { |
| 3208 | #ifdef CONFIG_YAFFS_AUTO_UNICODE |
| 3209 | if (dev->param.auto_unicode) { |
| 3210 | if (*oh_name) { |
| 3211 | /* It is an ASCII name, do an ASCII to |
| 3212 | * unicode conversion */ |
| 3213 | const char *ascii_oh_name = (const char *)oh_name; |
| 3214 | int n = buff_size - 1; |
| 3215 | while (n > 0 && *ascii_oh_name) { |
| 3216 | *name = *ascii_oh_name; |
| 3217 | name++; |
| 3218 | ascii_oh_name++; |
| 3219 | n--; |
| 3220 | } |
| 3221 | } else { |
| 3222 | yaffs_strncpy(name, oh_name + 1, buff_size - 1); |
| 3223 | } |
| 3224 | } else { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3225 | #else |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3226 | dev = dev; |
| 3227 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3228 | #endif |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3229 | yaffs_strncpy(name, oh_name, buff_size - 1); |
| 3230 | } |
| 3231 | } |
| 3232 | |
| 3233 | static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name, |
| 3234 | const YCHAR *name) |
| 3235 | { |
| 3236 | #ifdef CONFIG_YAFFS_AUTO_UNICODE |
| 3237 | |
| 3238 | int is_ascii; |
| 3239 | YCHAR *w; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3240 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3241 | if (dev->param.auto_unicode) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3242 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3243 | is_ascii = 1; |
| 3244 | w = name; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3245 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3246 | /* Figure out if the name will fit in ascii character set */ |
| 3247 | while (is_ascii && *w) { |
| 3248 | if ((*w) & 0xff00) |
| 3249 | is_ascii = 0; |
| 3250 | w++; |
| 3251 | } |
| 3252 | |
| 3253 | if (is_ascii) { |
| 3254 | /* It is an ASCII name, so convert unicode to ascii */ |
| 3255 | char *ascii_oh_name = (char *)oh_name; |
| 3256 | int n = YAFFS_MAX_NAME_LENGTH - 1; |
| 3257 | while (n > 0 && *name) { |
| 3258 | *ascii_oh_name = *name; |
| 3259 | name++; |
| 3260 | ascii_oh_name++; |
| 3261 | n--; |
| 3262 | } |
| 3263 | } else { |
| 3264 | /* Unicode name, so save starting at the second YCHAR */ |
| 3265 | *oh_name = 0; |
| 3266 | yaffs_strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2); |
| 3267 | } |
| 3268 | } else { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3269 | #else |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3270 | dev = dev; |
| 3271 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3272 | #endif |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3273 | yaffs_strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); |
| 3274 | } |
| 3275 | } |
| 3276 | |
| 3277 | /* UpdateObjectHeader updates the header on NAND for an object. |
| 3278 | * If name is not NULL, then that new name is used. |
| 3279 | */ |
| 3280 | int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force, |
| 3281 | int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) |
| 3282 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3283 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3284 | struct yaffs_block_info *bi; |
| 3285 | struct yaffs_dev *dev = in->my_dev; |
| 3286 | int prev_chunk_id; |
| 3287 | int ret_val = 0; |
| 3288 | int result = 0; |
| 3289 | int new_chunk_id; |
| 3290 | struct yaffs_ext_tags new_tags; |
| 3291 | struct yaffs_ext_tags old_tags; |
| 3292 | const YCHAR *alias = NULL; |
| 3293 | u8 *buffer = NULL; |
| 3294 | YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; |
| 3295 | struct yaffs_obj_hdr *oh = NULL; |
| 3296 | loff_t file_size = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3297 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3298 | yaffs_strcpy(old_name, _Y("silly old name")); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3299 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3300 | if (in->fake && in != dev->root_dir && !force && !xmod) |
| 3301 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3302 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3303 | yaffs_check_gc(dev, 0); |
| 3304 | yaffs_check_obj_details_loaded(in); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3305 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3306 | buffer = yaffs_get_temp_buffer(in->my_dev); |
| 3307 | oh = (struct yaffs_obj_hdr *)buffer; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3308 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3309 | prev_chunk_id = in->hdr_chunk; |
| 3310 | |
| 3311 | if (prev_chunk_id > 0) { |
| 3312 | result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, |
| 3313 | buffer, &old_tags); |
| 3314 | |
| 3315 | yaffs_verify_oh(in, oh, &old_tags, 0); |
| 3316 | memcpy(old_name, oh->name, sizeof(oh->name)); |
| 3317 | memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr)); |
| 3318 | } else { |
| 3319 | memset(buffer, 0xff, dev->data_bytes_per_chunk); |
| 3320 | } |
| 3321 | |
| 3322 | oh->type = in->variant_type; |
| 3323 | oh->yst_mode = in->yst_mode; |
| 3324 | oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; |
| 3325 | |
| 3326 | yaffs_load_attribs_oh(oh, in); |
| 3327 | |
| 3328 | if (in->parent) |
| 3329 | oh->parent_obj_id = in->parent->obj_id; |
| 3330 | else |
| 3331 | oh->parent_obj_id = 0; |
| 3332 | |
| 3333 | if (name && *name) { |
| 3334 | memset(oh->name, 0, sizeof(oh->name)); |
| 3335 | yaffs_load_oh_from_name(dev, oh->name, name); |
| 3336 | } else if (prev_chunk_id > 0) { |
| 3337 | memcpy(oh->name, old_name, sizeof(oh->name)); |
| 3338 | } else { |
| 3339 | memset(oh->name, 0, sizeof(oh->name)); |
| 3340 | } |
| 3341 | |
| 3342 | oh->is_shrink = is_shrink; |
| 3343 | |
| 3344 | switch (in->variant_type) { |
| 3345 | case YAFFS_OBJECT_TYPE_UNKNOWN: |
| 3346 | /* Should not happen */ |
| 3347 | break; |
| 3348 | case YAFFS_OBJECT_TYPE_FILE: |
| 3349 | if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED && |
| 3350 | oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED) |
| 3351 | file_size = in->variant.file_variant.file_size; |
| 3352 | yaffs_oh_size_load(oh, file_size); |
| 3353 | break; |
| 3354 | case YAFFS_OBJECT_TYPE_HARDLINK: |
| 3355 | oh->equiv_id = in->variant.hardlink_variant.equiv_id; |
| 3356 | break; |
| 3357 | case YAFFS_OBJECT_TYPE_SPECIAL: |
| 3358 | /* Do nothing */ |
| 3359 | break; |
| 3360 | case YAFFS_OBJECT_TYPE_DIRECTORY: |
| 3361 | /* Do nothing */ |
| 3362 | break; |
| 3363 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 3364 | alias = in->variant.symlink_variant.alias; |
| 3365 | if (!alias) |
| 3366 | alias = _Y("no alias"); |
| 3367 | yaffs_strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); |
| 3368 | oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; |
| 3369 | break; |
| 3370 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3371 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3372 | /* process any xattrib modifications */ |
| 3373 | if (xmod) |
| 3374 | yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3375 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3376 | /* Tags */ |
| 3377 | memset(&new_tags, 0, sizeof(new_tags)); |
| 3378 | in->serial++; |
| 3379 | new_tags.chunk_id = 0; |
| 3380 | new_tags.obj_id = in->obj_id; |
| 3381 | new_tags.serial_number = in->serial; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3382 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3383 | /* Add extra info for file header */ |
| 3384 | new_tags.extra_available = 1; |
| 3385 | new_tags.extra_parent_id = oh->parent_obj_id; |
| 3386 | new_tags.extra_file_size = file_size; |
| 3387 | new_tags.extra_is_shrink = oh->is_shrink; |
| 3388 | new_tags.extra_equiv_id = oh->equiv_id; |
| 3389 | new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; |
| 3390 | new_tags.extra_obj_type = in->variant_type; |
| 3391 | yaffs_verify_oh(in, oh, &new_tags, 1); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3392 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3393 | /* Create new chunk in NAND */ |
| 3394 | new_chunk_id = |
| 3395 | yaffs_write_new_chunk(dev, buffer, &new_tags, |
| 3396 | (prev_chunk_id > 0) ? 1 : 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3397 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3398 | if (buffer) |
| 3399 | yaffs_release_temp_buffer(dev, buffer); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3400 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3401 | if (new_chunk_id < 0) |
| 3402 | return new_chunk_id; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3403 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3404 | in->hdr_chunk = new_chunk_id; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3405 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3406 | if (prev_chunk_id > 0) |
| 3407 | yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3408 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3409 | if (!yaffs_obj_cache_dirty(in)) |
| 3410 | in->dirty = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3411 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3412 | /* If this was a shrink, then mark the block |
| 3413 | * that the chunk lives on */ |
| 3414 | if (is_shrink) { |
| 3415 | bi = yaffs_get_block_info(in->my_dev, |
| 3416 | new_chunk_id / |
| 3417 | in->my_dev->param.chunks_per_block); |
| 3418 | bi->has_shrink_hdr = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3419 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3420 | |
| 3421 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3422 | return new_chunk_id; |
| 3423 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3424 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3425 | /*--------------------- File read/write ------------------------ |
| 3426 | * Read and write have very similar structures. |
| 3427 | * In general the read/write has three parts to it |
| 3428 | * An incomplete chunk to start with (if the read/write is not chunk-aligned) |
| 3429 | * Some complete chunks |
| 3430 | * An incomplete chunk to end off with |
| 3431 | * |
| 3432 | * Curve-balls: the first chunk might also be the last chunk. |
| 3433 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3434 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3435 | int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) |
| 3436 | { |
| 3437 | int chunk; |
| 3438 | u32 start; |
| 3439 | int n_copy; |
| 3440 | int n = n_bytes; |
| 3441 | int n_done = 0; |
| 3442 | struct yaffs_cache *cache; |
| 3443 | struct yaffs_dev *dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3444 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3445 | dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3446 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3447 | while (n > 0) { |
| 3448 | yaffs_addr_to_chunk(dev, offset, &chunk, &start); |
| 3449 | chunk++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3450 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3451 | /* OK now check for the curveball where the start and end are in |
| 3452 | * the same chunk. |
| 3453 | */ |
| 3454 | if ((start + n) < dev->data_bytes_per_chunk) |
| 3455 | n_copy = n; |
| 3456 | else |
| 3457 | n_copy = dev->data_bytes_per_chunk - start; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3458 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3459 | cache = yaffs_find_chunk_cache(in, chunk); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3460 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3461 | /* If the chunk is already in the cache or it is less than |
| 3462 | * a whole chunk or we're using inband tags then use the cache |
| 3463 | * (if there is caching) else bypass the cache. |
| 3464 | */ |
| 3465 | if (cache || n_copy != dev->data_bytes_per_chunk || |
| 3466 | dev->param.inband_tags) { |
| 3467 | if (dev->param.n_caches > 0) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3468 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3469 | /* If we can't find the data in the cache, |
| 3470 | * then load it up. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3471 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3472 | if (!cache) { |
| 3473 | cache = |
| 3474 | yaffs_grab_chunk_cache(in->my_dev); |
| 3475 | cache->object = in; |
| 3476 | cache->chunk_id = chunk; |
| 3477 | cache->dirty = 0; |
| 3478 | cache->locked = 0; |
| 3479 | yaffs_rd_data_obj(in, chunk, |
| 3480 | cache->data); |
| 3481 | cache->n_bytes = 0; |
| 3482 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3483 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3484 | yaffs_use_cache(dev, cache, 0); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3485 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3486 | cache->locked = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3487 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3488 | memcpy(buffer, &cache->data[start], n_copy); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3489 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3490 | cache->locked = 0; |
| 3491 | } else { |
| 3492 | /* Read into the local buffer then copy.. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3493 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3494 | u8 *local_buffer = |
| 3495 | yaffs_get_temp_buffer(dev); |
| 3496 | yaffs_rd_data_obj(in, chunk, local_buffer); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3497 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3498 | memcpy(buffer, &local_buffer[start], n_copy); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3499 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3500 | yaffs_release_temp_buffer(dev, local_buffer); |
| 3501 | } |
| 3502 | } else { |
| 3503 | /* A full chunk. Read directly into the buffer. */ |
| 3504 | yaffs_rd_data_obj(in, chunk, buffer); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3505 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3506 | n -= n_copy; |
| 3507 | offset += n_copy; |
| 3508 | buffer += n_copy; |
| 3509 | n_done += n_copy; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3510 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3511 | return n_done; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3512 | } |
| 3513 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3514 | int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, |
| 3515 | int n_bytes, int write_through) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3516 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3517 | |
| 3518 | int chunk; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3519 | u32 start; |
| 3520 | int n_copy; |
| 3521 | int n = n_bytes; |
| 3522 | int n_done = 0; |
| 3523 | int n_writeback; |
| 3524 | loff_t start_write = offset; |
| 3525 | int chunk_written = 0; |
| 3526 | u32 n_bytes_read; |
| 3527 | loff_t chunk_start; |
| 3528 | struct yaffs_dev *dev; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3529 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3530 | dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3531 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3532 | while (n > 0 && chunk_written >= 0) { |
| 3533 | yaffs_addr_to_chunk(dev, offset, &chunk, &start); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3534 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3535 | if (((loff_t)chunk) * |
| 3536 | dev->data_bytes_per_chunk + start != offset || |
| 3537 | start >= dev->data_bytes_per_chunk) { |
| 3538 | yaffs_trace(YAFFS_TRACE_ERROR, |
| 3539 | "AddrToChunk of offset %lld gives chunk %d start %d", |
| 3540 | offset, chunk, start); |
| 3541 | } |
| 3542 | chunk++; /* File pos to chunk in file offset */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3543 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3544 | /* OK now check for the curveball where the start and end are in |
| 3545 | * the same chunk. |
| 3546 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3547 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3548 | if ((start + n) < dev->data_bytes_per_chunk) { |
| 3549 | n_copy = n; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3550 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3551 | /* Now calculate how many bytes to write back.... |
| 3552 | * If we're overwriting and not writing to then end of |
| 3553 | * file then we need to write back as much as was there |
| 3554 | * before. |
| 3555 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3556 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3557 | chunk_start = (((loff_t)(chunk - 1)) * |
| 3558 | dev->data_bytes_per_chunk); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3559 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3560 | if (chunk_start > in->variant.file_variant.file_size) |
| 3561 | n_bytes_read = 0; /* Past end of file */ |
| 3562 | else |
| 3563 | n_bytes_read = |
| 3564 | in->variant.file_variant.file_size - |
| 3565 | chunk_start; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3566 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3567 | if (n_bytes_read > dev->data_bytes_per_chunk) |
| 3568 | n_bytes_read = dev->data_bytes_per_chunk; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3569 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3570 | n_writeback = |
| 3571 | (n_bytes_read > |
| 3572 | (start + n)) ? n_bytes_read : (start + n); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3573 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3574 | if (n_writeback < 0 || |
| 3575 | n_writeback > dev->data_bytes_per_chunk) |
| 3576 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3577 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3578 | } else { |
| 3579 | n_copy = dev->data_bytes_per_chunk - start; |
| 3580 | n_writeback = dev->data_bytes_per_chunk; |
| 3581 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3582 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3583 | if (n_copy != dev->data_bytes_per_chunk || |
| 3584 | dev->param.inband_tags) { |
| 3585 | /* An incomplete start or end chunk (or maybe both |
| 3586 | * start and end chunk), or we're using inband tags, |
| 3587 | * so we want to use the cache buffers. |
| 3588 | */ |
| 3589 | if (dev->param.n_caches > 0) { |
| 3590 | struct yaffs_cache *cache; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3591 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3592 | /* If we can't find the data in the cache, then |
| 3593 | * load the cache */ |
| 3594 | cache = yaffs_find_chunk_cache(in, chunk); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3595 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3596 | if (!cache && |
| 3597 | yaffs_check_alloc_available(dev, 1)) { |
| 3598 | cache = yaffs_grab_chunk_cache(dev); |
| 3599 | cache->object = in; |
| 3600 | cache->chunk_id = chunk; |
| 3601 | cache->dirty = 0; |
| 3602 | cache->locked = 0; |
| 3603 | yaffs_rd_data_obj(in, chunk, |
| 3604 | cache->data); |
| 3605 | } else if (cache && |
| 3606 | !cache->dirty && |
| 3607 | !yaffs_check_alloc_available(dev, |
| 3608 | 1)) { |
| 3609 | /* Drop the cache if it was a read cache |
| 3610 | * item and no space check has been made |
| 3611 | * for it. |
| 3612 | */ |
| 3613 | cache = NULL; |
| 3614 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3615 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3616 | if (cache) { |
| 3617 | yaffs_use_cache(dev, cache, 1); |
| 3618 | cache->locked = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3619 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3620 | memcpy(&cache->data[start], buffer, |
| 3621 | n_copy); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3622 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3623 | cache->locked = 0; |
| 3624 | cache->n_bytes = n_writeback; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3625 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3626 | if (write_through) { |
| 3627 | chunk_written = |
| 3628 | yaffs_wr_data_obj |
| 3629 | (cache->object, |
| 3630 | cache->chunk_id, |
| 3631 | cache->data, |
| 3632 | cache->n_bytes, 1); |
| 3633 | cache->dirty = 0; |
| 3634 | } |
| 3635 | } else { |
| 3636 | chunk_written = -1; /* fail write */ |
| 3637 | } |
| 3638 | } else { |
| 3639 | /* An incomplete start or end chunk (or maybe |
| 3640 | * both start and end chunk). Read into the |
| 3641 | * local buffer then copy over and write back. |
| 3642 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3643 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3644 | u8 *local_buffer = yaffs_get_temp_buffer(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3645 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3646 | yaffs_rd_data_obj(in, chunk, local_buffer); |
| 3647 | memcpy(&local_buffer[start], buffer, n_copy); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3648 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3649 | chunk_written = |
| 3650 | yaffs_wr_data_obj(in, chunk, |
| 3651 | local_buffer, |
| 3652 | n_writeback, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3653 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3654 | yaffs_release_temp_buffer(dev, local_buffer); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3655 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3656 | } else { |
| 3657 | /* A full chunk. Write directly from the buffer. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3658 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3659 | chunk_written = |
| 3660 | yaffs_wr_data_obj(in, chunk, buffer, |
| 3661 | dev->data_bytes_per_chunk, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3662 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3663 | /* Since we've overwritten the cached data, |
| 3664 | * we better invalidate it. */ |
| 3665 | yaffs_invalidate_chunk_cache(in, chunk); |
| 3666 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3667 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3668 | if (chunk_written >= 0) { |
| 3669 | n -= n_copy; |
| 3670 | offset += n_copy; |
| 3671 | buffer += n_copy; |
| 3672 | n_done += n_copy; |
| 3673 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3674 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3675 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3676 | /* Update file object */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3677 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3678 | if ((start_write + n_done) > in->variant.file_variant.file_size) |
| 3679 | in->variant.file_variant.file_size = (start_write + n_done); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3680 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3681 | in->dirty = 1; |
| 3682 | return n_done; |
| 3683 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3684 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3685 | int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset, |
| 3686 | int n_bytes, int write_through) |
| 3687 | { |
| 3688 | yaffs2_handle_hole(in, offset); |
| 3689 | return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through); |
| 3690 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3691 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3692 | /* ---------------------- File resizing stuff ------------------ */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3693 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3694 | static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size) |
| 3695 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3696 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3697 | struct yaffs_dev *dev = in->my_dev; |
| 3698 | loff_t old_size = in->variant.file_variant.file_size; |
| 3699 | int i; |
| 3700 | int chunk_id; |
| 3701 | u32 dummy; |
| 3702 | int last_del; |
| 3703 | int start_del; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3704 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3705 | if (old_size > 0) |
| 3706 | yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy); |
| 3707 | else |
| 3708 | last_del = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3709 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3710 | yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1, |
| 3711 | &start_del, &dummy); |
| 3712 | last_del++; |
| 3713 | start_del++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3714 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3715 | /* Delete backwards so that we don't end up with holes if |
| 3716 | * power is lost part-way through the operation. |
| 3717 | */ |
| 3718 | for (i = last_del; i >= start_del; i--) { |
| 3719 | /* NB this could be optimised somewhat, |
| 3720 | * eg. could retrieve the tags and write them without |
| 3721 | * using yaffs_chunk_del |
| 3722 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3723 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3724 | chunk_id = yaffs_find_del_file_chunk(in, i, NULL); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3725 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3726 | if (chunk_id < 1) |
| 3727 | continue; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3728 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3729 | if (chunk_id < |
| 3730 | (dev->internal_start_block * dev->param.chunks_per_block) || |
| 3731 | chunk_id >= |
| 3732 | ((dev->internal_end_block + 1) * |
| 3733 | dev->param.chunks_per_block)) { |
| 3734 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 3735 | "Found daft chunk_id %d for %d", |
| 3736 | chunk_id, i); |
| 3737 | } else { |
| 3738 | in->n_data_chunks--; |
| 3739 | yaffs_chunk_del(dev, chunk_id, 1, __LINE__); |
| 3740 | } |
| 3741 | } |
| 3742 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3743 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3744 | void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) |
| 3745 | { |
| 3746 | int new_full; |
| 3747 | u32 new_partial; |
| 3748 | struct yaffs_dev *dev = obj->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3749 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3750 | yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3751 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3752 | yaffs_prune_chunks(obj, new_size); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3753 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3754 | if (new_partial != 0) { |
| 3755 | int last_chunk = 1 + new_full; |
| 3756 | u8 *local_buffer = yaffs_get_temp_buffer(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3757 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3758 | /* Rewrite the last chunk with its new size and zero pad */ |
| 3759 | yaffs_rd_data_obj(obj, last_chunk, local_buffer); |
| 3760 | memset(local_buffer + new_partial, 0, |
| 3761 | dev->data_bytes_per_chunk - new_partial); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3762 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3763 | yaffs_wr_data_obj(obj, last_chunk, local_buffer, |
| 3764 | new_partial, 1); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3765 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3766 | yaffs_release_temp_buffer(dev, local_buffer); |
| 3767 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3768 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3769 | obj->variant.file_variant.file_size = new_size; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3770 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3771 | yaffs_prune_tree(dev, &obj->variant.file_variant); |
| 3772 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3773 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3774 | int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) |
| 3775 | { |
| 3776 | struct yaffs_dev *dev = in->my_dev; |
| 3777 | loff_t old_size = in->variant.file_variant.file_size; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3778 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3779 | yaffs_flush_file_cache(in); |
| 3780 | yaffs_invalidate_whole_cache(in); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3781 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3782 | yaffs_check_gc(dev, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3783 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3784 | if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) |
| 3785 | return YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3786 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3787 | if (new_size == old_size) |
| 3788 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3789 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3790 | if (new_size > old_size) { |
| 3791 | yaffs2_handle_hole(in, new_size); |
| 3792 | in->variant.file_variant.file_size = new_size; |
| 3793 | } else { |
| 3794 | /* new_size < old_size */ |
| 3795 | yaffs_resize_file_down(in, new_size); |
| 3796 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3797 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3798 | /* Write a new object header to reflect the resize. |
| 3799 | * show we've shrunk the file, if need be |
| 3800 | * Do this only if the file is not in the deleted directories |
| 3801 | * and is not shadowed. |
| 3802 | */ |
| 3803 | if (in->parent && |
| 3804 | !in->is_shadowed && |
| 3805 | in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && |
| 3806 | in->parent->obj_id != YAFFS_OBJECTID_DELETED) |
| 3807 | yaffs_update_oh(in, NULL, 0, 0, 0, NULL); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3808 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3809 | return YAFFS_OK; |
| 3810 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3811 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3812 | int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) |
| 3813 | { |
| 3814 | if (!in->dirty) |
| 3815 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3816 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3817 | yaffs_flush_file_cache(in); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3818 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3819 | if (data_sync) |
| 3820 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3821 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3822 | if (update_time) |
| 3823 | yaffs_load_current_time(in, 0, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3824 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3825 | return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ? |
| 3826 | YAFFS_OK : YAFFS_FAIL; |
| 3827 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3828 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3829 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3830 | /* yaffs_del_file deletes the whole file data |
| 3831 | * and the inode associated with the file. |
| 3832 | * It does not delete the links associated with the file. |
| 3833 | */ |
| 3834 | static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) |
| 3835 | { |
| 3836 | int ret_val; |
| 3837 | int del_now = 0; |
| 3838 | struct yaffs_dev *dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3839 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3840 | if (!in->my_inode) |
| 3841 | del_now = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3842 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3843 | if (del_now) { |
| 3844 | ret_val = |
| 3845 | yaffs_change_obj_name(in, in->my_dev->del_dir, |
| 3846 | _Y("deleted"), 0, 0); |
| 3847 | yaffs_trace(YAFFS_TRACE_TRACING, |
| 3848 | "yaffs: immediate deletion of file %d", |
| 3849 | in->obj_id); |
| 3850 | in->deleted = 1; |
| 3851 | in->my_dev->n_deleted_files++; |
| 3852 | if (dev->param.disable_soft_del || dev->param.is_yaffs2) |
| 3853 | yaffs_resize_file(in, 0); |
| 3854 | yaffs_soft_del_file(in); |
| 3855 | } else { |
| 3856 | ret_val = |
| 3857 | yaffs_change_obj_name(in, in->my_dev->unlinked_dir, |
| 3858 | _Y("unlinked"), 0, 0); |
| 3859 | } |
| 3860 | return ret_val; |
| 3861 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3862 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3863 | int yaffs_del_file(struct yaffs_obj *in) |
| 3864 | { |
| 3865 | int ret_val = YAFFS_OK; |
| 3866 | int deleted; /* Need to cache value on stack if in is freed */ |
| 3867 | struct yaffs_dev *dev = in->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3868 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3869 | if (dev->param.disable_soft_del || dev->param.is_yaffs2) |
| 3870 | yaffs_resize_file(in, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3871 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3872 | if (in->n_data_chunks > 0) { |
| 3873 | /* Use soft deletion if there is data in the file. |
| 3874 | * That won't be the case if it has been resized to zero. |
| 3875 | */ |
| 3876 | if (!in->unlinked) |
| 3877 | ret_val = yaffs_unlink_file_if_needed(in); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3878 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3879 | deleted = in->deleted; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3880 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3881 | if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { |
| 3882 | in->deleted = 1; |
| 3883 | deleted = 1; |
| 3884 | in->my_dev->n_deleted_files++; |
| 3885 | yaffs_soft_del_file(in); |
| 3886 | } |
| 3887 | return deleted ? YAFFS_OK : YAFFS_FAIL; |
| 3888 | } else { |
| 3889 | /* The file has no data chunks so we toss it immediately */ |
| 3890 | yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); |
| 3891 | in->variant.file_variant.top = NULL; |
| 3892 | yaffs_generic_obj_del(in); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3893 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3894 | return YAFFS_OK; |
| 3895 | } |
| 3896 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3897 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3898 | int yaffs_is_non_empty_dir(struct yaffs_obj *obj) |
| 3899 | { |
| 3900 | return (obj && |
| 3901 | obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && |
| 3902 | !(list_empty(&obj->variant.dir_variant.children)); |
| 3903 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3904 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3905 | static int yaffs_del_dir(struct yaffs_obj *obj) |
| 3906 | { |
| 3907 | /* First check that the directory is empty. */ |
| 3908 | if (yaffs_is_non_empty_dir(obj)) |
| 3909 | return YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3910 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3911 | return yaffs_generic_obj_del(obj); |
| 3912 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3913 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3914 | static int yaffs_del_symlink(struct yaffs_obj *in) |
| 3915 | { |
| 3916 | kfree(in->variant.symlink_variant.alias); |
| 3917 | in->variant.symlink_variant.alias = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3918 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3919 | return yaffs_generic_obj_del(in); |
| 3920 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3921 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3922 | static int yaffs_del_link(struct yaffs_obj *in) |
| 3923 | { |
| 3924 | /* remove this hardlink from the list associated with the equivalent |
| 3925 | * object |
| 3926 | */ |
| 3927 | list_del_init(&in->hard_links); |
| 3928 | return yaffs_generic_obj_del(in); |
| 3929 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3930 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3931 | int yaffs_del_obj(struct yaffs_obj *obj) |
| 3932 | { |
| 3933 | int ret_val = -1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3934 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3935 | switch (obj->variant_type) { |
| 3936 | case YAFFS_OBJECT_TYPE_FILE: |
| 3937 | ret_val = yaffs_del_file(obj); |
| 3938 | break; |
| 3939 | case YAFFS_OBJECT_TYPE_DIRECTORY: |
| 3940 | if (!list_empty(&obj->variant.dir_variant.dirty)) { |
| 3941 | yaffs_trace(YAFFS_TRACE_BACKGROUND, |
| 3942 | "Remove object %d from dirty directories", |
| 3943 | obj->obj_id); |
| 3944 | list_del_init(&obj->variant.dir_variant.dirty); |
| 3945 | } |
| 3946 | return yaffs_del_dir(obj); |
| 3947 | break; |
| 3948 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 3949 | ret_val = yaffs_del_symlink(obj); |
| 3950 | break; |
| 3951 | case YAFFS_OBJECT_TYPE_HARDLINK: |
| 3952 | ret_val = yaffs_del_link(obj); |
| 3953 | break; |
| 3954 | case YAFFS_OBJECT_TYPE_SPECIAL: |
| 3955 | ret_val = yaffs_generic_obj_del(obj); |
| 3956 | break; |
| 3957 | case YAFFS_OBJECT_TYPE_UNKNOWN: |
| 3958 | ret_val = 0; |
| 3959 | break; /* should not happen. */ |
| 3960 | } |
| 3961 | return ret_val; |
| 3962 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3963 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3964 | static int yaffs_unlink_worker(struct yaffs_obj *obj) |
| 3965 | { |
| 3966 | int del_now = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3967 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3968 | if (!obj) |
| 3969 | return YAFFS_FAIL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3970 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3971 | if (!obj->my_inode) |
| 3972 | del_now = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3973 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3974 | yaffs_update_parent(obj->parent); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3975 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3976 | if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { |
| 3977 | return yaffs_del_link(obj); |
| 3978 | } else if (!list_empty(&obj->hard_links)) { |
| 3979 | /* Curve ball: We're unlinking an object that has a hardlink. |
| 3980 | * |
| 3981 | * This problem arises because we are not strictly following |
| 3982 | * The Linux link/inode model. |
| 3983 | * |
| 3984 | * We can't really delete the object. |
| 3985 | * Instead, we do the following: |
| 3986 | * - Select a hardlink. |
| 3987 | * - Unhook it from the hard links |
| 3988 | * - Move it from its parent directory so that the rename works. |
| 3989 | * - Rename the object to the hardlink's name. |
| 3990 | * - Delete the hardlink |
| 3991 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 3992 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3993 | struct yaffs_obj *hl; |
| 3994 | struct yaffs_obj *parent; |
| 3995 | int ret_val; |
| 3996 | YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 3997 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 3998 | hl = list_entry(obj->hard_links.next, struct yaffs_obj, |
| 3999 | hard_links); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4000 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4001 | yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); |
| 4002 | parent = hl->parent; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4003 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4004 | list_del_init(&hl->hard_links); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4005 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4006 | yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4007 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4008 | ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4009 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4010 | if (ret_val == YAFFS_OK) |
| 4011 | ret_val = yaffs_generic_obj_del(hl); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4012 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4013 | return ret_val; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4014 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4015 | } else if (del_now) { |
| 4016 | switch (obj->variant_type) { |
| 4017 | case YAFFS_OBJECT_TYPE_FILE: |
| 4018 | return yaffs_del_file(obj); |
| 4019 | break; |
| 4020 | case YAFFS_OBJECT_TYPE_DIRECTORY: |
| 4021 | list_del_init(&obj->variant.dir_variant.dirty); |
| 4022 | return yaffs_del_dir(obj); |
| 4023 | break; |
| 4024 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 4025 | return yaffs_del_symlink(obj); |
| 4026 | break; |
| 4027 | case YAFFS_OBJECT_TYPE_SPECIAL: |
| 4028 | return yaffs_generic_obj_del(obj); |
| 4029 | break; |
| 4030 | case YAFFS_OBJECT_TYPE_HARDLINK: |
| 4031 | case YAFFS_OBJECT_TYPE_UNKNOWN: |
| 4032 | default: |
| 4033 | return YAFFS_FAIL; |
| 4034 | } |
| 4035 | } else if (yaffs_is_non_empty_dir(obj)) { |
| 4036 | return YAFFS_FAIL; |
| 4037 | } else { |
| 4038 | return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, |
| 4039 | _Y("unlinked"), 0, 0); |
| 4040 | } |
| 4041 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4042 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4043 | static int yaffs_unlink_obj(struct yaffs_obj *obj) |
| 4044 | { |
| 4045 | if (obj && obj->unlink_allowed) |
| 4046 | return yaffs_unlink_worker(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4047 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4048 | return YAFFS_FAIL; |
| 4049 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4050 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4051 | int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name) |
| 4052 | { |
| 4053 | struct yaffs_obj *obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4054 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4055 | obj = yaffs_find_by_name(dir, name); |
| 4056 | return yaffs_unlink_obj(obj); |
| 4057 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4058 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4059 | /* Note: |
| 4060 | * If old_name is NULL then we take old_dir as the object to be renamed. |
| 4061 | */ |
| 4062 | int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name, |
| 4063 | struct yaffs_obj *new_dir, const YCHAR *new_name) |
| 4064 | { |
| 4065 | struct yaffs_obj *obj = NULL; |
| 4066 | struct yaffs_obj *existing_target = NULL; |
| 4067 | int force = 0; |
| 4068 | int result; |
| 4069 | struct yaffs_dev *dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4070 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4071 | if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { |
| 4072 | BUG(); |
| 4073 | return YAFFS_FAIL; |
| 4074 | } |
| 4075 | if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { |
| 4076 | BUG(); |
| 4077 | return YAFFS_FAIL; |
| 4078 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4079 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4080 | dev = old_dir->my_dev; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4081 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4082 | #ifdef CONFIG_YAFFS_CASE_INSENSITIVE |
| 4083 | /* Special case for case insemsitive systems. |
| 4084 | * While look-up is case insensitive, the name isn't. |
| 4085 | * Therefore we might want to change x.txt to X.txt |
| 4086 | */ |
| 4087 | if (old_dir == new_dir && |
| 4088 | old_name && new_name && |
| 4089 | yaffs_strcmp(old_name, new_name) == 0) |
| 4090 | force = 1; |
| 4091 | #endif |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4092 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4093 | if (yaffs_strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > |
| 4094 | YAFFS_MAX_NAME_LENGTH) |
| 4095 | /* ENAMETOOLONG */ |
| 4096 | return YAFFS_FAIL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4097 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4098 | if (old_name) |
| 4099 | obj = yaffs_find_by_name(old_dir, old_name); |
| 4100 | else{ |
| 4101 | obj = old_dir; |
| 4102 | old_dir = obj->parent; |
| 4103 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4104 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4105 | if (obj && obj->rename_allowed) { |
| 4106 | /* Now handle an existing target, if there is one */ |
| 4107 | existing_target = yaffs_find_by_name(new_dir, new_name); |
| 4108 | if (yaffs_is_non_empty_dir(existing_target)) { |
| 4109 | return YAFFS_FAIL; /* ENOTEMPTY */ |
| 4110 | } else if (existing_target && existing_target != obj) { |
| 4111 | /* Nuke the target first, using shadowing, |
| 4112 | * but only if it isn't the same object. |
| 4113 | * |
| 4114 | * Note we must disable gc here otherwise it can mess |
| 4115 | * up the shadowing. |
| 4116 | * |
| 4117 | */ |
| 4118 | dev->gc_disable = 1; |
| 4119 | yaffs_change_obj_name(obj, new_dir, new_name, force, |
| 4120 | existing_target->obj_id); |
| 4121 | existing_target->is_shadowed = 1; |
| 4122 | yaffs_unlink_obj(existing_target); |
| 4123 | dev->gc_disable = 0; |
| 4124 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4125 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4126 | result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4127 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4128 | yaffs_update_parent(old_dir); |
| 4129 | if (new_dir != old_dir) |
| 4130 | yaffs_update_parent(new_dir); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4131 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4132 | return result; |
| 4133 | } |
| 4134 | return YAFFS_FAIL; |
| 4135 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4136 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4137 | /*----------------------- Initialisation Scanning ---------------------- */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4138 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4139 | void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, |
| 4140 | int backward_scanning) |
| 4141 | { |
| 4142 | struct yaffs_obj *obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4143 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4144 | if (backward_scanning) { |
| 4145 | /* Handle YAFFS2 case (backward scanning) |
| 4146 | * If the shadowed object exists then ignore. |
| 4147 | */ |
| 4148 | obj = yaffs_find_by_number(dev, obj_id); |
| 4149 | if (obj) |
| 4150 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4151 | } |
| 4152 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4153 | /* Let's create it (if it does not exist) assuming it is a file so that |
| 4154 | * it can do shrinking etc. |
| 4155 | * We put it in unlinked dir to be cleaned up after the scanning |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4156 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4157 | obj = |
| 4158 | yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); |
| 4159 | if (!obj) |
| 4160 | return; |
| 4161 | obj->is_shadowed = 1; |
| 4162 | yaffs_add_obj_to_dir(dev->unlinked_dir, obj); |
| 4163 | obj->variant.file_variant.shrink_size = 0; |
| 4164 | obj->valid = 1; /* So that we don't read any other info. */ |
| 4165 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4166 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4167 | void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list) |
| 4168 | { |
| 4169 | struct list_head *lh; |
| 4170 | struct list_head *save; |
| 4171 | struct yaffs_obj *hl; |
| 4172 | struct yaffs_obj *in; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4173 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4174 | list_for_each_safe(lh, save, hard_list) { |
| 4175 | hl = list_entry(lh, struct yaffs_obj, hard_links); |
| 4176 | in = yaffs_find_by_number(dev, |
| 4177 | hl->variant.hardlink_variant.equiv_id); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4178 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4179 | if (in) { |
| 4180 | /* Add the hardlink pointers */ |
| 4181 | hl->variant.hardlink_variant.equiv_obj = in; |
| 4182 | list_add(&hl->hard_links, &in->hard_links); |
| 4183 | } else { |
| 4184 | /* Todo Need to report/handle this better. |
| 4185 | * Got a problem... hardlink to a non-existant object |
| 4186 | */ |
| 4187 | hl->variant.hardlink_variant.equiv_obj = NULL; |
| 4188 | INIT_LIST_HEAD(&hl->hard_links); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4189 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4190 | } |
| 4191 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4192 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4193 | static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) |
| 4194 | { |
| 4195 | /* |
| 4196 | * Sort out state of unlinked and deleted objects after scanning. |
| 4197 | */ |
| 4198 | struct list_head *i; |
| 4199 | struct list_head *n; |
| 4200 | struct yaffs_obj *l; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4201 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4202 | if (dev->read_only) |
| 4203 | return; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4204 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4205 | /* Soft delete all the unlinked files */ |
| 4206 | list_for_each_safe(i, n, |
| 4207 | &dev->unlinked_dir->variant.dir_variant.children) { |
| 4208 | l = list_entry(i, struct yaffs_obj, siblings); |
| 4209 | yaffs_del_obj(l); |
| 4210 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4211 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4212 | list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { |
| 4213 | l = list_entry(i, struct yaffs_obj, siblings); |
| 4214 | yaffs_del_obj(l); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4215 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4216 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4217 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4218 | /* |
| 4219 | * This code iterates through all the objects making sure that they are rooted. |
| 4220 | * Any unrooted objects are re-rooted in lost+found. |
| 4221 | * An object needs to be in one of: |
| 4222 | * - Directly under deleted, unlinked |
| 4223 | * - Directly or indirectly under root. |
| 4224 | * |
| 4225 | * Note: |
| 4226 | * This code assumes that we don't ever change the current relationships |
| 4227 | * between directories: |
| 4228 | * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL |
| 4229 | * lost-n-found->parent == root_dir |
| 4230 | * |
| 4231 | * This fixes the problem where directories might have inadvertently been |
| 4232 | * deleted leaving the object "hanging" without being rooted in the |
| 4233 | * directory tree. |
| 4234 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4235 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4236 | static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) |
| 4237 | { |
| 4238 | return (obj == dev->del_dir || |
| 4239 | obj == dev->unlinked_dir || obj == dev->root_dir); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4240 | } |
| 4241 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4242 | static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4243 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4244 | struct yaffs_obj *obj; |
| 4245 | struct yaffs_obj *parent; |
| 4246 | int i; |
| 4247 | struct list_head *lh; |
| 4248 | struct list_head *n; |
| 4249 | int depth_limit; |
| 4250 | int hanging; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4251 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4252 | if (dev->read_only) |
| 4253 | return; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4254 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4255 | /* Iterate through the objects in each hash entry, |
| 4256 | * looking at each object. |
| 4257 | * Make sure it is rooted. |
| 4258 | */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4259 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4260 | for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { |
| 4261 | list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { |
| 4262 | obj = list_entry(lh, struct yaffs_obj, hash_link); |
| 4263 | parent = obj->parent; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4264 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4265 | if (yaffs_has_null_parent(dev, obj)) { |
| 4266 | /* These directories are not hanging */ |
| 4267 | hanging = 0; |
| 4268 | } else if (!parent || |
| 4269 | parent->variant_type != |
| 4270 | YAFFS_OBJECT_TYPE_DIRECTORY) { |
| 4271 | hanging = 1; |
| 4272 | } else if (yaffs_has_null_parent(dev, parent)) { |
| 4273 | hanging = 0; |
| 4274 | } else { |
| 4275 | /* |
| 4276 | * Need to follow the parent chain to |
| 4277 | * see if it is hanging. |
| 4278 | */ |
| 4279 | hanging = 0; |
| 4280 | depth_limit = 100; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4281 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4282 | while (parent != dev->root_dir && |
| 4283 | parent->parent && |
| 4284 | parent->parent->variant_type == |
| 4285 | YAFFS_OBJECT_TYPE_DIRECTORY && |
| 4286 | depth_limit > 0) { |
| 4287 | parent = parent->parent; |
| 4288 | depth_limit--; |
| 4289 | } |
| 4290 | if (parent != dev->root_dir) |
| 4291 | hanging = 1; |
| 4292 | } |
| 4293 | if (hanging) { |
| 4294 | yaffs_trace(YAFFS_TRACE_SCAN, |
| 4295 | "Hanging object %d moved to lost and found", |
| 4296 | obj->obj_id); |
| 4297 | yaffs_add_obj_to_dir(dev->lost_n_found, obj); |
| 4298 | } |
| 4299 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4300 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4301 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4302 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4303 | /* |
| 4304 | * Delete directory contents for cleaning up lost and found. |
| 4305 | */ |
| 4306 | static void yaffs_del_dir_contents(struct yaffs_obj *dir) |
| 4307 | { |
| 4308 | struct yaffs_obj *obj; |
| 4309 | struct list_head *lh; |
| 4310 | struct list_head *n; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4311 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4312 | if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) |
| 4313 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4314 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4315 | list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { |
| 4316 | obj = list_entry(lh, struct yaffs_obj, siblings); |
| 4317 | if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) |
| 4318 | yaffs_del_dir_contents(obj); |
| 4319 | yaffs_trace(YAFFS_TRACE_SCAN, |
| 4320 | "Deleting lost_found object %d", |
| 4321 | obj->obj_id); |
| 4322 | yaffs_unlink_obj(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4323 | } |
| 4324 | } |
| 4325 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4326 | static void yaffs_empty_l_n_f(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4327 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4328 | yaffs_del_dir_contents(dev->lost_n_found); |
| 4329 | } |
| 4330 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4331 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4332 | struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory, |
| 4333 | const YCHAR *name) |
| 4334 | { |
| 4335 | int sum; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4336 | struct list_head *i; |
| 4337 | YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4338 | struct yaffs_obj *l; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4339 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4340 | if (!name) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4341 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4342 | |
| 4343 | if (!directory) { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4344 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 4345 | "tragedy: yaffs_find_by_name: null pointer directory" |
| 4346 | ); |
| 4347 | BUG(); |
| 4348 | return NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4349 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4350 | if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { |
| 4351 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 4352 | "tragedy: yaffs_find_by_name: non-directory" |
| 4353 | ); |
| 4354 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4355 | } |
| 4356 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4357 | sum = yaffs_calc_name_sum(name); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4358 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4359 | list_for_each(i, &directory->variant.dir_variant.children) { |
| 4360 | l = list_entry(i, struct yaffs_obj, siblings); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4361 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4362 | if (l->parent != directory) |
| 4363 | BUG(); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4364 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4365 | yaffs_check_obj_details_loaded(l); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4366 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4367 | /* Special case for lost-n-found */ |
| 4368 | if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { |
| 4369 | if (!yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME)) |
| 4370 | return l; |
| 4371 | } else if (l->sum == sum || l->hdr_chunk <= 0) { |
| 4372 | /* LostnFound chunk called Objxxx |
| 4373 | * Do a real check |
| 4374 | */ |
| 4375 | yaffs_get_obj_name(l, buffer, |
| 4376 | YAFFS_MAX_NAME_LENGTH + 1); |
| 4377 | if (!yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH)) |
| 4378 | return l; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4379 | } |
| 4380 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4381 | return NULL; |
| 4382 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4383 | |
| 4384 | /* GetEquivalentObject dereferences any hard links to get to the |
| 4385 | * actual object. |
| 4386 | */ |
| 4387 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4388 | struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4389 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4390 | if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { |
| 4391 | obj = obj->variant.hardlink_variant.equiv_obj; |
| 4392 | yaffs_check_obj_details_loaded(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4393 | } |
| 4394 | return obj; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4395 | } |
| 4396 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4397 | /* |
| 4398 | * A note or two on object names. |
| 4399 | * * If the object name is missing, we then make one up in the form objnnn |
| 4400 | * |
| 4401 | * * ASCII names are stored in the object header's name field from byte zero |
| 4402 | * * Unicode names are historically stored starting from byte zero. |
| 4403 | * |
| 4404 | * Then there are automatic Unicode names... |
| 4405 | * The purpose of these is to save names in a way that can be read as |
| 4406 | * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII |
| 4407 | * system to share files. |
| 4408 | * |
| 4409 | * These automatic unicode are stored slightly differently... |
| 4410 | * - If the name can fit in the ASCII character space then they are saved as |
| 4411 | * ascii names as per above. |
| 4412 | * - If the name needs Unicode then the name is saved in Unicode |
| 4413 | * starting at oh->name[1]. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4414 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4415 | */ |
| 4416 | static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name, |
| 4417 | int buffer_size) |
| 4418 | { |
| 4419 | /* Create an object name if we could not find one. */ |
| 4420 | if (yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) { |
| 4421 | YCHAR local_name[20]; |
| 4422 | YCHAR num_string[20]; |
| 4423 | YCHAR *x = &num_string[19]; |
| 4424 | unsigned v = obj->obj_id; |
| 4425 | num_string[19] = 0; |
| 4426 | while (v > 0) { |
| 4427 | x--; |
| 4428 | *x = '0' + (v % 10); |
| 4429 | v /= 10; |
| 4430 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4431 | /* make up a name */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4432 | yaffs_strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); |
| 4433 | yaffs_strcat(local_name, x); |
| 4434 | yaffs_strncpy(name, local_name, buffer_size - 1); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4435 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4436 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4437 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4438 | int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size) |
| 4439 | { |
| 4440 | memset(name, 0, buffer_size * sizeof(YCHAR)); |
| 4441 | yaffs_check_obj_details_loaded(obj); |
| 4442 | if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { |
| 4443 | yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); |
| 4444 | } else if (obj->short_name[0]) { |
| 4445 | yaffs_strcpy(name, obj->short_name); |
| 4446 | } else if (obj->hdr_chunk > 0) { |
| 4447 | int result; |
| 4448 | u8 *buffer = yaffs_get_temp_buffer(obj->my_dev); |
| 4449 | |
| 4450 | struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4451 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4452 | memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4453 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4454 | if (obj->hdr_chunk > 0) { |
| 4455 | result = yaffs_rd_chunk_tags_nand(obj->my_dev, |
| 4456 | obj->hdr_chunk, |
| 4457 | buffer, NULL); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4458 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4459 | yaffs_load_name_from_oh(obj->my_dev, name, oh->name, |
| 4460 | buffer_size); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4461 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4462 | yaffs_release_temp_buffer(obj->my_dev, buffer); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4463 | } |
| 4464 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4465 | yaffs_fix_null_name(obj, name, buffer_size); |
| 4466 | |
| 4467 | return yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4468 | } |
| 4469 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4470 | loff_t yaffs_get_obj_length(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4471 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4472 | /* Dereference any hard linking */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4473 | obj = yaffs_get_equivalent_obj(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4474 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4475 | if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) |
| 4476 | return obj->variant.file_variant.file_size; |
| 4477 | if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { |
| 4478 | if (!obj->variant.symlink_variant.alias) |
| 4479 | return 0; |
| 4480 | return yaffs_strnlen(obj->variant.symlink_variant.alias, |
| 4481 | YAFFS_MAX_ALIAS_LENGTH); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4482 | } else { |
| 4483 | /* Only a directory should drop through to here */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4484 | return obj->my_dev->data_bytes_per_chunk; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4485 | } |
| 4486 | } |
| 4487 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4488 | int yaffs_get_obj_link_count(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4489 | { |
| 4490 | int count = 0; |
| 4491 | struct list_head *i; |
| 4492 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4493 | if (!obj->unlinked) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4494 | count++; /* the object itself */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4495 | |
| 4496 | list_for_each(i, &obj->hard_links) |
| 4497 | count++; /* add the hard links; */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4498 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4499 | return count; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4500 | } |
| 4501 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4502 | int yaffs_get_obj_inode(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4503 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4504 | obj = yaffs_get_equivalent_obj(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4505 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4506 | return obj->obj_id; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4507 | } |
| 4508 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4509 | unsigned yaffs_get_obj_type(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4510 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4511 | obj = yaffs_get_equivalent_obj(obj); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4512 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4513 | switch (obj->variant_type) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4514 | case YAFFS_OBJECT_TYPE_FILE: |
| 4515 | return DT_REG; |
| 4516 | break; |
| 4517 | case YAFFS_OBJECT_TYPE_DIRECTORY: |
| 4518 | return DT_DIR; |
| 4519 | break; |
| 4520 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 4521 | return DT_LNK; |
| 4522 | break; |
| 4523 | case YAFFS_OBJECT_TYPE_HARDLINK: |
| 4524 | return DT_REG; |
| 4525 | break; |
| 4526 | case YAFFS_OBJECT_TYPE_SPECIAL: |
| 4527 | if (S_ISFIFO(obj->yst_mode)) |
| 4528 | return DT_FIFO; |
| 4529 | if (S_ISCHR(obj->yst_mode)) |
| 4530 | return DT_CHR; |
| 4531 | if (S_ISBLK(obj->yst_mode)) |
| 4532 | return DT_BLK; |
| 4533 | if (S_ISSOCK(obj->yst_mode)) |
| 4534 | return DT_SOCK; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4535 | return DT_REG; |
| 4536 | break; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4537 | default: |
| 4538 | return DT_REG; |
| 4539 | break; |
| 4540 | } |
| 4541 | } |
| 4542 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4543 | YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4544 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4545 | obj = yaffs_get_equivalent_obj(obj); |
| 4546 | if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) |
| 4547 | return yaffs_clone_str(obj->variant.symlink_variant.alias); |
| 4548 | else |
| 4549 | return yaffs_clone_str(_Y("")); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4550 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4551 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4552 | /*--------------------------- Initialisation code -------------------------- */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4553 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4554 | static int yaffs_check_dev_fns(const struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4555 | { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4556 | /* Common functions, gotta have */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4557 | if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4558 | return 0; |
| 4559 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4560 | /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4561 | if (dev->param.write_chunk_tags_fn && |
| 4562 | dev->param.read_chunk_tags_fn && |
| 4563 | !dev->param.write_chunk_fn && |
| 4564 | !dev->param.read_chunk_fn && |
| 4565 | dev->param.bad_block_fn && dev->param.query_block_fn) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4566 | return 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4567 | |
| 4568 | /* Can use the "spare" style interface for yaffs1 */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4569 | if (!dev->param.is_yaffs2 && |
| 4570 | !dev->param.write_chunk_tags_fn && |
| 4571 | !dev->param.read_chunk_tags_fn && |
| 4572 | dev->param.write_chunk_fn && |
| 4573 | dev->param.read_chunk_fn && |
| 4574 | !dev->param.bad_block_fn && !dev->param.query_block_fn) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4575 | return 1; |
| 4576 | |
| 4577 | return 0; /* bad */ |
| 4578 | } |
| 4579 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4580 | static int yaffs_create_initial_dir(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4581 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4582 | /* Initialise the unlinked, deleted, root and lost+found directories */ |
| 4583 | dev->lost_n_found = dev->root_dir = NULL; |
| 4584 | dev->unlinked_dir = dev->del_dir = NULL; |
| 4585 | dev->unlinked_dir = |
| 4586 | yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); |
| 4587 | dev->del_dir = |
| 4588 | yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); |
| 4589 | dev->root_dir = |
| 4590 | yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, |
| 4591 | YAFFS_ROOT_MODE | S_IFDIR); |
| 4592 | dev->lost_n_found = |
| 4593 | yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, |
| 4594 | YAFFS_LOSTNFOUND_MODE | S_IFDIR); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4595 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4596 | if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir |
| 4597 | && dev->del_dir) { |
| 4598 | yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4599 | return YAFFS_OK; |
| 4600 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4601 | return YAFFS_FAIL; |
| 4602 | } |
| 4603 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4604 | int yaffs_guts_initialise(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4605 | { |
| 4606 | int init_failed = 0; |
| 4607 | unsigned x; |
| 4608 | int bits; |
| 4609 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4610 | yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4611 | |
| 4612 | /* Check stuff that must be set */ |
| 4613 | |
| 4614 | if (!dev) { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4615 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 4616 | "yaffs: Need a device" |
| 4617 | ); |
| 4618 | return YAFFS_FAIL; |
| 4619 | } |
| 4620 | |
| 4621 | if (dev->is_mounted) { |
| 4622 | yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4623 | return YAFFS_FAIL; |
| 4624 | } |
| 4625 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4626 | dev->internal_start_block = dev->param.start_block; |
| 4627 | dev->internal_end_block = dev->param.end_block; |
| 4628 | dev->block_offset = 0; |
| 4629 | dev->chunk_offset = 0; |
| 4630 | dev->n_free_chunks = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4631 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4632 | dev->gc_block = 0; |
| 4633 | |
| 4634 | if (dev->param.start_block == 0) { |
| 4635 | dev->internal_start_block = dev->param.start_block + 1; |
| 4636 | dev->internal_end_block = dev->param.end_block + 1; |
| 4637 | dev->block_offset = 1; |
| 4638 | dev->chunk_offset = dev->param.chunks_per_block; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4639 | } |
| 4640 | |
| 4641 | /* Check geometry parameters. */ |
| 4642 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4643 | if ((!dev->param.inband_tags && dev->param.is_yaffs2 && |
| 4644 | dev->param.total_bytes_per_chunk < 1024) || |
| 4645 | (!dev->param.is_yaffs2 && |
| 4646 | dev->param.total_bytes_per_chunk < 512) || |
| 4647 | (dev->param.inband_tags && !dev->param.is_yaffs2) || |
| 4648 | dev->param.chunks_per_block < 2 || |
| 4649 | dev->param.n_reserved_blocks < 2 || |
| 4650 | dev->internal_start_block <= 0 || |
| 4651 | dev->internal_end_block <= 0 || |
| 4652 | dev->internal_end_block <= |
| 4653 | (dev->internal_start_block + dev->param.n_reserved_blocks + 2) |
| 4654 | ) { |
| 4655 | /* otherwise it is too small */ |
| 4656 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 4657 | "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", |
| 4658 | dev->param.total_bytes_per_chunk, |
| 4659 | dev->param.is_yaffs2 ? "2" : "", |
| 4660 | dev->param.inband_tags); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4661 | return YAFFS_FAIL; |
| 4662 | } |
| 4663 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4664 | if (yaffs_init_nand(dev) != YAFFS_OK) { |
| 4665 | yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4666 | return YAFFS_FAIL; |
| 4667 | } |
| 4668 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4669 | /* Sort out space for inband tags, if required */ |
| 4670 | if (dev->param.inband_tags) |
| 4671 | dev->data_bytes_per_chunk = |
| 4672 | dev->param.total_bytes_per_chunk - |
| 4673 | sizeof(struct yaffs_packed_tags2_tags_only); |
| 4674 | else |
| 4675 | dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; |
| 4676 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4677 | /* Got the right mix of functions? */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4678 | if (!yaffs_check_dev_fns(dev)) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4679 | /* Function missing */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4680 | yaffs_trace(YAFFS_TRACE_ALWAYS, |
| 4681 | "device function(s) missing or wrong"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4682 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4683 | return YAFFS_FAIL; |
| 4684 | } |
| 4685 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4686 | /* Finished with most checks. Further checks happen later on too. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4687 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4688 | dev->is_mounted = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4689 | |
| 4690 | /* OK now calculate a few things for the device */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4691 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4692 | /* |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4693 | * Calculate all the chunk size manipulation numbers: |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4694 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4695 | x = dev->data_bytes_per_chunk; |
| 4696 | /* We always use dev->chunk_shift and dev->chunk_div */ |
| 4697 | dev->chunk_shift = calc_shifts(x); |
| 4698 | x >>= dev->chunk_shift; |
| 4699 | dev->chunk_div = x; |
| 4700 | /* We only use chunk mask if chunk_div is 1 */ |
| 4701 | dev->chunk_mask = (1 << dev->chunk_shift) - 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4702 | |
| 4703 | /* |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4704 | * Calculate chunk_grp_bits. |
| 4705 | * We need to find the next power of 2 > than internal_end_block |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4706 | */ |
| 4707 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4708 | x = dev->param.chunks_per_block * (dev->internal_end_block + 1); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4709 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4710 | bits = calc_shifts_ceiling(x); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4711 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4712 | /* Set up tnode width if wide tnodes are enabled. */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4713 | if (!dev->param.wide_tnodes_disabled) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4714 | /* bits must be even so that we end up with 32-bit words */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4715 | if (bits & 1) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4716 | bits++; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4717 | if (bits < 16) |
| 4718 | dev->tnode_width = 16; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4719 | else |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4720 | dev->tnode_width = bits; |
| 4721 | } else { |
| 4722 | dev->tnode_width = 16; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4723 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4724 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4725 | dev->tnode_mask = (1 << dev->tnode_width) - 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4726 | |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4727 | /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), |
| 4728 | * so if the bitwidth of the |
| 4729 | * chunk range we're using is greater than 16 we need |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4730 | * to figure out chunk shift and chunk_grp_size |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4731 | */ |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4732 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4733 | if (bits <= dev->tnode_width) |
| 4734 | dev->chunk_grp_bits = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4735 | else |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4736 | dev->chunk_grp_bits = bits - dev->tnode_width; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4737 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4738 | dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8; |
| 4739 | if (dev->tnode_size < sizeof(struct yaffs_tnode)) |
| 4740 | dev->tnode_size = sizeof(struct yaffs_tnode); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4741 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4742 | dev->chunk_grp_size = 1 << dev->chunk_grp_bits; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4743 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4744 | if (dev->param.chunks_per_block < dev->chunk_grp_size) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4745 | /* We have a problem because the soft delete won't work if |
| 4746 | * the chunk group size > chunks per block. |
| 4747 | * This can be remedied by using larger "virtual blocks". |
| 4748 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4749 | yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4750 | |
| 4751 | return YAFFS_FAIL; |
| 4752 | } |
| 4753 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4754 | /* Finished verifying the device, continue with initialisation */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4755 | |
| 4756 | /* More device initialisation */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4757 | dev->all_gcs = 0; |
| 4758 | dev->passive_gc_count = 0; |
| 4759 | dev->oldest_dirty_gc_count = 0; |
| 4760 | dev->bg_gcs = 0; |
| 4761 | dev->gc_block_finder = 0; |
| 4762 | dev->buffered_block = -1; |
| 4763 | dev->doing_buffered_block_rewrite = 0; |
| 4764 | dev->n_deleted_files = 0; |
| 4765 | dev->n_bg_deletions = 0; |
| 4766 | dev->n_unlinked_files = 0; |
| 4767 | dev->n_ecc_fixed = 0; |
| 4768 | dev->n_ecc_unfixed = 0; |
| 4769 | dev->n_tags_ecc_fixed = 0; |
| 4770 | dev->n_tags_ecc_unfixed = 0; |
| 4771 | dev->n_erase_failures = 0; |
| 4772 | dev->n_erased_blocks = 0; |
| 4773 | dev->gc_disable = 0; |
| 4774 | dev->has_pending_prioritised_gc = 1; |
| 4775 | /* Assume the worst for now, will get fixed on first GC */ |
| 4776 | INIT_LIST_HEAD(&dev->dirty_dirs); |
| 4777 | dev->oldest_dirty_seq = 0; |
| 4778 | dev->oldest_dirty_block = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4779 | |
| 4780 | /* Initialise temporary buffers and caches. */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4781 | if (!yaffs_init_tmp_buffers(dev)) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4782 | init_failed = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4783 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4784 | dev->cache = NULL; |
| 4785 | dev->gc_cleanup_list = NULL; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4786 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4787 | if (!init_failed && dev->param.n_caches > 0) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4788 | int i; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4789 | void *buf; |
| 4790 | int cache_bytes = |
| 4791 | dev->param.n_caches * sizeof(struct yaffs_cache); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4792 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4793 | if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) |
| 4794 | dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4795 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4796 | dev->cache = kmalloc(cache_bytes, GFP_NOFS); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4797 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4798 | buf = (u8 *) dev->cache; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4799 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4800 | if (dev->cache) |
| 4801 | memset(dev->cache, 0, cache_bytes); |
| 4802 | |
| 4803 | for (i = 0; i < dev->param.n_caches && buf; i++) { |
| 4804 | dev->cache[i].object = NULL; |
| 4805 | dev->cache[i].last_use = 0; |
| 4806 | dev->cache[i].dirty = 0; |
| 4807 | dev->cache[i].data = buf = |
| 4808 | kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4809 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4810 | if (!buf) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4811 | init_failed = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4812 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4813 | dev->cache_last_use = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4814 | } |
| 4815 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4816 | dev->cache_hits = 0; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4817 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4818 | if (!init_failed) { |
| 4819 | dev->gc_cleanup_list = |
| 4820 | kmalloc(dev->param.chunks_per_block * sizeof(u32), |
| 4821 | GFP_NOFS); |
| 4822 | if (!dev->gc_cleanup_list) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4823 | init_failed = 1; |
| 4824 | } |
| 4825 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4826 | if (dev->param.is_yaffs2) |
| 4827 | dev->param.use_header_file_size = 1; |
| 4828 | |
| 4829 | if (!init_failed && !yaffs_init_blocks(dev)) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4830 | init_failed = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4831 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4832 | yaffs_init_tnodes_and_objs(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4833 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4834 | if (!init_failed && !yaffs_create_initial_dir(dev)) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4835 | init_failed = 1; |
| 4836 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4837 | if (!init_failed && dev->param.is_yaffs2 && |
| 4838 | !dev->param.disable_summary && |
| 4839 | !yaffs_summary_init(dev)) |
| 4840 | init_failed = 1; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4841 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4842 | if (!init_failed) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4843 | /* Now scan the flash. */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4844 | if (dev->param.is_yaffs2) { |
| 4845 | if (yaffs2_checkpt_restore(dev)) { |
| 4846 | yaffs_check_obj_details_loaded(dev->root_dir); |
| 4847 | yaffs_trace(YAFFS_TRACE_CHECKPOINT | |
| 4848 | YAFFS_TRACE_MOUNT, |
| 4849 | "yaffs: restored from checkpoint" |
| 4850 | ); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4851 | } else { |
| 4852 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4853 | /* Clean up the mess caused by an aborted |
| 4854 | * checkpoint load then scan backwards. |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4855 | */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4856 | yaffs_deinit_blocks(dev); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4857 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4858 | yaffs_deinit_tnodes_and_objs(dev); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4859 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4860 | dev->n_erased_blocks = 0; |
| 4861 | dev->n_free_chunks = 0; |
| 4862 | dev->alloc_block = -1; |
| 4863 | dev->alloc_page = -1; |
| 4864 | dev->n_deleted_files = 0; |
| 4865 | dev->n_unlinked_files = 0; |
| 4866 | dev->n_bg_deletions = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4867 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4868 | if (!init_failed && !yaffs_init_blocks(dev)) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4869 | init_failed = 1; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4870 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4871 | yaffs_init_tnodes_and_objs(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4872 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4873 | if (!init_failed |
| 4874 | && !yaffs_create_initial_dir(dev)) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4875 | init_failed = 1; |
| 4876 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4877 | if (!init_failed && !yaffs2_scan_backwards(dev)) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4878 | init_failed = 1; |
| 4879 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4880 | } else if (!yaffs1_scan(dev)) { |
| 4881 | init_failed = 1; |
| 4882 | } |
| 4883 | |
| 4884 | yaffs_strip_deleted_objs(dev); |
| 4885 | yaffs_fix_hanging_objs(dev); |
| 4886 | if (dev->param.empty_lost_n_found) |
| 4887 | yaffs_empty_l_n_f(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4888 | } |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4889 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4890 | if (init_failed) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4891 | /* Clean up the mess */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4892 | yaffs_trace(YAFFS_TRACE_TRACING, |
| 4893 | "yaffs: yaffs_guts_initialise() aborted."); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4894 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4895 | yaffs_deinitialise(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4896 | return YAFFS_FAIL; |
| 4897 | } |
| 4898 | |
| 4899 | /* Zero out stats */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4900 | dev->n_page_reads = 0; |
| 4901 | dev->n_page_writes = 0; |
| 4902 | dev->n_erasures = 0; |
| 4903 | dev->n_gc_copies = 0; |
| 4904 | dev->n_retried_writes = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4905 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4906 | dev->n_retired_blocks = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4907 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4908 | yaffs_verify_free_chunks(dev); |
| 4909 | yaffs_verify_blocks(dev); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4910 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4911 | /* Clean up any aborted checkpoint data */ |
| 4912 | if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) |
| 4913 | yaffs2_checkpt_invalidate(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4914 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4915 | yaffs_trace(YAFFS_TRACE_TRACING, |
| 4916 | "yaffs: yaffs_guts_initialise() done."); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4917 | return YAFFS_OK; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4918 | } |
| 4919 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4920 | void yaffs_deinitialise(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4921 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4922 | if (dev->is_mounted) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4923 | int i; |
| 4924 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4925 | yaffs_deinit_blocks(dev); |
| 4926 | yaffs_deinit_tnodes_and_objs(dev); |
| 4927 | yaffs_summary_deinit(dev); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4928 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4929 | if (dev->param.n_caches > 0 && dev->cache) { |
| 4930 | |
| 4931 | for (i = 0; i < dev->param.n_caches; i++) { |
| 4932 | kfree(dev->cache[i].data); |
| 4933 | dev->cache[i].data = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4934 | } |
| 4935 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4936 | kfree(dev->cache); |
| 4937 | dev->cache = NULL; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4938 | } |
| 4939 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4940 | kfree(dev->gc_cleanup_list); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4941 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4942 | for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) |
| 4943 | kfree(dev->temp_buffer[i].buffer); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4944 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4945 | dev->is_mounted = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4946 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4947 | if (dev->param.deinitialise_flash_fn) |
| 4948 | dev->param.deinitialise_flash_fn(dev); |
| 4949 | } |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4950 | } |
| 4951 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4952 | int yaffs_count_free_chunks(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4953 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4954 | int n_free = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4955 | int b; |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4956 | struct yaffs_block_info *blk; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4957 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4958 | blk = dev->block_info; |
| 4959 | for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { |
| 4960 | switch (blk->block_state) { |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4961 | case YAFFS_BLOCK_STATE_EMPTY: |
| 4962 | case YAFFS_BLOCK_STATE_ALLOCATING: |
| 4963 | case YAFFS_BLOCK_STATE_COLLECTING: |
| 4964 | case YAFFS_BLOCK_STATE_FULL: |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4965 | n_free += |
| 4966 | (dev->param.chunks_per_block - blk->pages_in_use + |
| 4967 | blk->soft_del_pages); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4968 | break; |
| 4969 | default: |
| 4970 | break; |
| 4971 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4972 | blk++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4973 | } |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4974 | return n_free; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4975 | } |
| 4976 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4977 | int yaffs_get_n_free_chunks(struct yaffs_dev *dev) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4978 | { |
| 4979 | /* This is what we report to the outside world */ |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4980 | int n_free; |
| 4981 | int n_dirty_caches; |
| 4982 | int blocks_for_checkpt; |
| 4983 | int i; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4984 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4985 | n_free = dev->n_free_chunks; |
| 4986 | n_free += dev->n_deleted_files; |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4987 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4988 | /* Now count and subtract the number of dirty chunks in the cache. */ |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4989 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4990 | for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { |
| 4991 | if (dev->cache[i].dirty) |
| 4992 | n_dirty_caches++; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4993 | } |
| 4994 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4995 | n_free -= n_dirty_caches; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 4996 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 4997 | n_free -= |
| 4998 | ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 4999 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5000 | /* Now figure checkpoint space and report that... */ |
| 5001 | blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); |
Wolfgang Denk | 74e0dde | 2008-08-14 14:41:06 +0200 | [diff] [blame] | 5002 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5003 | n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5004 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5005 | if (n_free < 0) |
| 5006 | n_free = 0; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5007 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5008 | return n_free; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5009 | } |
| 5010 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5011 | /*\ |
| 5012 | * Marshalling functions to get loff_t file sizes into aand out of |
| 5013 | * object headers. |
| 5014 | */ |
| 5015 | void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5016 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5017 | oh->file_size_low = (fsize & 0xFFFFFFFF); |
| 5018 | oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF); |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5019 | } |
| 5020 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5021 | loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh) |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5022 | { |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5023 | loff_t retval; |
| 5024 | |
| 5025 | if (~(oh->file_size_high)) |
| 5026 | retval = (((loff_t) oh->file_size_high) << 32) | |
| 5027 | (((loff_t) oh->file_size_low) & 0xFFFFFFFF); |
| 5028 | else |
| 5029 | retval = (loff_t) oh->file_size_low; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5030 | |
Charles Manning | 3796e1f | 2012-05-09 16:55:17 +0000 | [diff] [blame^] | 5031 | return retval; |
William Juul | c051bbe | 2007-11-15 11:13:05 +0100 | [diff] [blame] | 5032 | } |