Rewrite of NAND code based on what is in 2.6.12 Linux kernel
Patch by Ladislav Michl, 29 Jun 2005
diff --git a/fs/jffs2/jffs2_nand_1pass.c b/fs/jffs2/jffs2_nand_1pass.c
new file mode 100644
index 0000000..ce80a43
--- /dev/null
+++ b/fs/jffs2/jffs2_nand_1pass.c
@@ -0,0 +1,1045 @@
+#include <common.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_JFFS2)
+
+#include <malloc.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+
+#include <jffs2/jffs2.h>
+#include <jffs2/jffs2_1pass.h>
+#include <nand.h>
+
+#include "jffs2_nand_private.h"
+
+#define NODE_CHUNK 1024 /* size of memory allocation chunk in b_nodes */
+
+/* Debugging switches */
+#undef DEBUG_DIRENTS /* print directory entry list after scan */
+#undef DEBUG_FRAGMENTS /* print fragment list after scan */
+#undef DEBUG /* enable debugging messages */
+
+#ifdef DEBUG
+# define DEBUGF(fmt,args...) printf(fmt ,##args)
+#else
+# define DEBUGF(fmt,args...)
+#endif
+
+static int nanddev = -1; /* nand device of current partition */
+static nand_info_t *nand;
+
+/* Compression names */
+static char *compr_names[] = {
+ "NONE",
+ "ZERO",
+ "RTIME",
+ "RUBINMIPS",
+ "COPY",
+ "DYNRUBIN",
+ "ZLIB",
+#if defined(CONFIG_JFFS2_LZO_LZARI)
+ "LZO",
+ "LZARI",
+#endif
+};
+
+/* Spinning wheel */
+static char spinner[] = { '|', '/', '-', '\\' };
+
+/* Memory management */
+struct mem_block {
+ unsigned index;
+ struct mem_block *next;
+ char nodes[0];
+};
+
+static void
+free_nodes(struct b_list *list)
+{
+ while (list->listMemBase != NULL) {
+ struct mem_block *next = list->listMemBase->next;
+ free(list->listMemBase);
+ list->listMemBase = next;
+ }
+}
+
+static struct b_node *
+add_node(struct b_list *list, int size)
+{
+ u32 index = 0;
+ struct mem_block *memBase;
+ struct b_node *b;
+
+ memBase = list->listMemBase;
+ if (memBase != NULL)
+ index = memBase->index;
+
+ if (memBase == NULL || index >= NODE_CHUNK) {
+ /* we need more space before we continue */
+ memBase = mmalloc(sizeof(struct mem_block) + NODE_CHUNK * size);
+ if (memBase == NULL) {
+ putstr("add_node: malloc failed\n");
+ return NULL;
+ }
+ memBase->next = list->listMemBase;
+ index = 0;
+ }
+ /* now we have room to add it. */
+ b = (struct b_node *)&memBase->nodes[size * index];
+ index ++;
+
+ memBase->index = index;
+ list->listMemBase = memBase;
+ list->listCount++;
+ return b;
+}
+
+static struct b_node *
+insert_node(struct b_list *list, struct b_node *new)
+{
+#ifdef CFG_JFFS2_SORT_FRAGMENTS
+ struct b_node *b, *prev;
+
+ if (list->listTail != NULL && list->listCompare(new, list->listTail))
+ prev = list->listTail;
+ else if (list->listLast != NULL && list->listCompare(new, list->listLast))
+ prev = list->listLast;
+ else
+ prev = NULL;
+
+ for (b = (prev ? prev->next : list->listHead);
+ b != NULL && list->listCompare(new, b);
+ prev = b, b = b->next) {
+ list->listLoops++;
+ }
+ if (b != NULL)
+ list->listLast = prev;
+
+ if (b != NULL) {
+ new->next = b;
+ if (prev != NULL)
+ prev->next = new;
+ else
+ list->listHead = new;
+ } else
+#endif
+ {
+ new->next = (struct b_node *) NULL;
+ if (list->listTail != NULL) {
+ list->listTail->next = new;
+ list->listTail = new;
+ } else {
+ list->listTail = list->listHead = new;
+ }
+ }
+
+ return new;
+}
+
+static struct b_node *
+insert_inode(struct b_list *list, struct jffs2_raw_inode *node, u32 offset)
+{
+ struct b_inode *new;
+
+ if (!(new = (struct b_inode *)add_node(list, sizeof(struct b_inode)))) {
+ putstr("add_node failed!\r\n");
+ return NULL;
+ }
+ new->offset = offset;
+ new->version = node->version;
+ new->ino = node->ino;
+ new->isize = node->isize;
+ new->csize = node->csize;
+
+ return insert_node(list, (struct b_node *)new);
+}
+
+static struct b_node *
+insert_dirent(struct b_list *list, struct jffs2_raw_dirent *node, u32 offset)
+{
+ struct b_dirent *new;
+
+ if (!(new = (struct b_dirent *)add_node(list, sizeof(struct b_dirent)))) {
+ putstr("add_node failed!\r\n");
+ return NULL;
+ }
+ new->offset = offset;
+ new->version = node->version;
+ new->pino = node->pino;
+ new->ino = node->ino;
+ new->nhash = full_name_hash(node->name, node->nsize);
+ new->nsize = node->nsize;
+ new->type = node->type;
+
+ return insert_node(list, (struct b_node *)new);
+}
+
+#ifdef CFG_JFFS2_SORT_FRAGMENTS
+/* Sort data entries with the latest version last, so that if there
+ * is overlapping data the latest version will be used.
+ */
+static int compare_inodes(struct b_node *new, struct b_node *old)
+{
+ struct jffs2_raw_inode ojNew;
+ struct jffs2_raw_inode ojOld;
+ struct jffs2_raw_inode *jNew =
+ (struct jffs2_raw_inode *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew);
+ struct jffs2_raw_inode *jOld =
+ (struct jffs2_raw_inode *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld);
+
+ return jNew->version > jOld->version;
+}
+
+/* Sort directory entries so all entries in the same directory
+ * with the same name are grouped together, with the latest version
+ * last. This makes it easy to eliminate all but the latest version
+ * by marking the previous version dead by setting the inode to 0.
+ */
+static int compare_dirents(struct b_node *new, struct b_node *old)
+{
+ struct jffs2_raw_dirent ojNew;
+ struct jffs2_raw_dirent ojOld;
+ struct jffs2_raw_dirent *jNew =
+ (struct jffs2_raw_dirent *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew);
+ struct jffs2_raw_dirent *jOld =
+ (struct jffs2_raw_dirent *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld);
+ int cmp;
+
+ /* ascending sort by pino */
+ if (jNew->pino != jOld->pino)
+ return jNew->pino > jOld->pino;
+
+ /* pino is the same, so use ascending sort by nsize, so
+ * we don't do strncmp unless we really must.
+ */
+ if (jNew->nsize != jOld->nsize)
+ return jNew->nsize > jOld->nsize;
+
+ /* length is also the same, so use ascending sort by name
+ */
+ cmp = strncmp(jNew->name, jOld->name, jNew->nsize);
+ if (cmp != 0)
+ return cmp > 0;
+
+ /* we have duplicate names in this directory, so use ascending
+ * sort by version
+ */
+ if (jNew->version > jOld->version) {
+ /* since jNew is newer, we know jOld is not valid, so
+ * mark it with inode 0 and it will not be used
+ */
+ jOld->ino = 0;
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
+static u32
+jffs_init_1pass_list(struct part_info *part)
+{
+ struct b_lists *pL;
+
+ if (part->jffs2_priv != NULL) {
+ pL = (struct b_lists *)part->jffs2_priv;
+ free_nodes(&pL->frag);
+ free_nodes(&pL->dir);
+ free(pL);
+ }
+ if (NULL != (part->jffs2_priv = malloc(sizeof(struct b_lists)))) {
+ pL = (struct b_lists *)part->jffs2_priv;
+
+ memset(pL, 0, sizeof(*pL));
+#ifdef CFG_JFFS2_SORT_FRAGMENTS
+ pL->dir.listCompare = compare_dirents;
+ pL->frag.listCompare = compare_inodes;
+#endif
+ }
+ return 0;
+}
+
+/* find the inode from the slashless name given a parent */
+static long
+jffs2_1pass_read_inode(struct b_lists *pL, u32 ino, char *dest,
+ struct stat *stat)
+{
+ struct b_inode *jNode;
+ u32 totalSize = 0;
+ u32 latestVersion = 0;
+ long ret;
+
+#ifdef CFG_JFFS2_SORT_FRAGMENTS
+ /* Find file size before loading any data, so fragments that
+ * start past the end of file can be ignored. A fragment
+ * that is partially in the file is loaded, so extra data may
+ * be loaded up to the next 4K boundary above the file size.
+ * This shouldn't cause trouble when loading kernel images, so
+ * we will live with it.
+ */
+ for (jNode = (struct b_inode *)pL->frag.listHead; jNode; jNode = jNode->next) {
+ if ((ino == jNode->ino)) {
+ /* get actual file length from the newest node */
+ if (jNode->version >= latestVersion) {
+ totalSize = jNode->isize;
+ latestVersion = jNode->version;
+ }
+ }
+ }
+#endif
+
+ for (jNode = (struct b_inode *)pL->frag.listHead; jNode; jNode = jNode->next) {
+ if ((ino != jNode->ino))
+ continue;
+#ifndef CFG_JFFS2_SORT_FRAGMENTS
+ /* get actual file length from the newest node */
+ if (jNode->version >= latestVersion) {
+ totalSize = jNode->isize;
+ latestVersion = jNode->version;
+ }
+#endif
+ if (dest || stat) {
+ char *src, *dst;
+ char data[4096 + sizeof(struct jffs2_raw_inode)];
+ struct jffs2_raw_inode *inode;
+ size_t len;
+
+ inode = (struct jffs2_raw_inode *)&data;
+ len = sizeof(struct jffs2_raw_inode);
+ if (dest)
+ len += jNode->csize;
+ nand_read(nand, jNode->offset, &len, inode);
+ /* ignore data behind latest known EOF */
+ if (inode->offset > totalSize)
+ continue;
+
+ if (stat) {
+ stat->st_mtime = inode->mtime;
+ stat->st_mode = inode->mode;
+ stat->st_ino = inode->ino;
+ stat->st_size = totalSize;
+ }
+
+ if (!dest)
+ continue;
+
+ src = ((char *) inode) + sizeof(struct jffs2_raw_inode);
+ dst = (char *) (dest + inode->offset);
+
+ switch (inode->compr) {
+ case JFFS2_COMPR_NONE:
+ ret = 0;
+ memcpy(dst, src, inode->dsize);
+ break;
+ case JFFS2_COMPR_ZERO:
+ ret = 0;
+ memset(dst, 0, inode->dsize);
+ break;
+ case JFFS2_COMPR_RTIME:
+ ret = 0;
+ rtime_decompress(src, dst, inode->csize, inode->dsize);
+ break;
+ case JFFS2_COMPR_DYNRUBIN:
+ /* this is slow but it works */
+ ret = 0;
+ dynrubin_decompress(src, dst, inode->csize, inode->dsize);
+ break;
+ case JFFS2_COMPR_ZLIB:
+ ret = zlib_decompress(src, dst, inode->csize, inode->dsize);
+ break;
+#if defined(CONFIG_JFFS2_LZO_LZARI)
+ case JFFS2_COMPR_LZO:
+ ret = lzo_decompress(src, dst, inode->csize, inode->dsize);
+ break;
+ case JFFS2_COMPR_LZARI:
+ ret = lzari_decompress(src, dst, inode->csize, inode->dsize);
+ break;
+#endif
+ default:
+ /* unknown */
+ putLabeledWord("UNKOWN COMPRESSION METHOD = ", inode->compr);
+ return -1;
+ }
+ }
+ }
+
+ return totalSize;
+}
+
+/* find the inode from the slashless name given a parent */
+static u32
+jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino)
+{
+ struct b_dirent *jDir;
+ int len = strlen(name); /* name is assumed slash free */
+ unsigned int nhash = full_name_hash(name, len);
+ u32 version = 0;
+ u32 inode = 0;
+
+ /* we need to search all and return the inode with the highest version */
+ for (jDir = (struct b_dirent *)pL->dir.listHead; jDir; jDir = jDir->next) {
+ if ((pino == jDir->pino) && (jDir->ino) && /* 0 for unlink */
+ (len == jDir->nsize) && (nhash == jDir->nhash)) {
+ /* TODO: compare name */
+ if (jDir->version < version)
+ continue;
+
+ if (jDir->version == version && inode != 0) {
+ /* I'm pretty sure this isn't legal */
+ putstr(" ** ERROR ** ");
+// putnstr(jDir->name, jDir->nsize);
+// putLabeledWord(" has dup version =", version);
+ }
+ inode = jDir->ino;
+ version = jDir->version;
+ }
+ }
+ return inode;
+}
+
+char *mkmodestr(unsigned long mode, char *str)
+{
+ static const char *l = "xwr";
+ int mask = 1, i;
+ char c;
+
+ switch (mode & S_IFMT) {
+ case S_IFDIR: str[0] = 'd'; break;
+ case S_IFBLK: str[0] = 'b'; break;
+ case S_IFCHR: str[0] = 'c'; break;
+ case S_IFIFO: str[0] = 'f'; break;
+ case S_IFLNK: str[0] = 'l'; break;
+ case S_IFSOCK: str[0] = 's'; break;
+ case S_IFREG: str[0] = '-'; break;
+ default: str[0] = '?';
+ }
+
+ for(i = 0; i < 9; i++) {
+ c = l[i%3];
+ str[9-i] = (mode & mask)?c:'-';
+ mask = mask<<1;
+ }
+
+ if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
+ if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
+ if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
+ str[10] = '\0';
+ return str;
+}
+
+static inline void dump_stat(struct stat *st, const char *name)
+{
+ char str[20];
+ char s[64], *p;
+
+ if (st->st_mtime == (time_t)(-1)) /* some ctimes really hate -1 */
+ st->st_mtime = 1;
+
+ ctime_r(&st->st_mtime, s/*,64*/); /* newlib ctime doesn't have buflen */
+
+ if ((p = strchr(s,'\n')) != NULL) *p = '\0';
+ if ((p = strchr(s,'\r')) != NULL) *p = '\0';
+
+/*
+ printf("%6lo %s %8ld %s %s\n", st->st_mode, mkmodestr(st->st_mode, str),
+ st->st_size, s, name);
+*/
+
+ printf(" %s %8ld %s %s", mkmodestr(st->st_mode,str), st->st_size, s, name);
+}
+
+static inline int
+dump_inode(struct b_lists *pL, struct b_dirent *d, struct b_inode *i)
+{
+ char fname[JFFS2_MAX_NAME_LEN + 1];
+ struct stat st;
+ size_t len;
+
+ if(!d || !i) return -1;
+ len = d->nsize;
+ nand_read(nand, d->offset + sizeof(struct jffs2_raw_dirent),
+ &len, &fname);
+ fname[d->nsize] = '\0';
+
+ memset(&st, 0, sizeof(st));
+
+ jffs2_1pass_read_inode(pL, i->ino, NULL, &st);
+
+ dump_stat(&st, fname);
+/* FIXME
+ if (d->type == DT_LNK) {
+ unsigned char *src = (unsigned char *) (&i[1]);
+ putstr(" -> ");
+ putnstr(src, (int)i->dsize);
+ }
+*/
+ putstr("\r\n");
+
+ return 0;
+}
+
+/* list inodes with the given pino */
+static u32
+jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino)
+{
+ struct b_dirent *jDir;
+ u32 i_version = 0;
+
+ for (jDir = (struct b_dirent *)pL->dir.listHead; jDir; jDir = jDir->next) {
+ if ((pino == jDir->pino) && (jDir->ino)) { /* ino=0 -> unlink */
+ struct b_inode *jNode = (struct b_inode *)pL->frag.listHead;
+ struct b_inode *i = NULL;
+
+ while (jNode) {
+ if (jNode->ino == jDir->ino && jNode->version >= i_version) {
+ i_version = jNode->version;
+ i = jNode;
+ }
+ jNode = jNode->next;
+ }
+ dump_inode(pL, jDir, i);
+ }
+ }
+ return pino;
+}
+
+static u32
+jffs2_1pass_search_inode(struct b_lists * pL, const char *fname, u32 pino)
+{
+ int i;
+ char tmp[256];
+ char working_tmp[256];
+ char *c;
+
+ /* discard any leading slash */
+ i = 0;
+ while (fname[i] == '/')
+ i++;
+ strcpy(tmp, &fname[i]);
+
+ while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
+ {
+ strncpy(working_tmp, tmp, c - tmp);
+ working_tmp[c - tmp] = '\0';
+#if 0
+ putstr("search_inode: tmp = ");
+ putstr(tmp);
+ putstr("\r\n");
+ putstr("search_inode: wtmp = ");
+ putstr(working_tmp);
+ putstr("\r\n");
+ putstr("search_inode: c = ");
+ putstr(c);
+ putstr("\r\n");
+#endif
+ for (i = 0; i < strlen(c) - 1; i++)
+ tmp[i] = c[i + 1];
+ tmp[i] = '\0';
+#if 0
+ putstr("search_inode: post tmp = ");
+ putstr(tmp);
+ putstr("\r\n");
+#endif
+
+ if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino))) {
+ putstr("find_inode failed for name=");
+ putstr(working_tmp);
+ putstr("\r\n");
+ return 0;
+ }
+ }
+ /* this is for the bare filename, directories have already been mapped */
+ if (!(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
+ putstr("find_inode failed for name=");
+ putstr(tmp);
+ putstr("\r\n");
+ return 0;
+ }
+ return pino;
+
+}
+
+static u32
+jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
+{
+ struct b_dirent *jDir;
+ struct b_inode *jNode;
+ u8 jDirFoundType = 0;
+ u32 jDirFoundIno = 0;
+ u32 jDirFoundPino = 0;
+ char tmp[JFFS2_MAX_NAME_LEN + 1];
+ u32 version = 0;
+ u32 pino;
+
+ /* we need to search all and return the inode with the highest version */
+ for (jDir = (struct b_dirent *)pL->dir.listHead; jDir; jDir = jDir->next) {
+ if (ino == jDir->ino) {
+ if (jDir->version < version)
+ continue;
+
+ if (jDir->version == version && jDirFoundType) {
+ /* I'm pretty sure this isn't legal */
+ putstr(" ** ERROR ** ");
+// putnstr(jDir->name, jDir->nsize);
+// putLabeledWord(" has dup version (resolve) = ",
+// version);
+ }
+
+ jDirFoundType = jDir->type;
+ jDirFoundIno = jDir->ino;
+ jDirFoundPino = jDir->pino;
+ version = jDir->version;
+ }
+ }
+ /* now we found the right entry again. (shoulda returned inode*) */
+ if (jDirFoundType != DT_LNK)
+ return jDirFoundIno;
+
+ /* it's a soft link so we follow it again. */
+ for (jNode = (struct b_inode *)pL->frag.listHead; jNode; jNode = jNode->next) {
+ if (jNode->ino == jDirFoundIno) {
+ size_t len = jNode->csize;
+ nand_read(nand, jNode->offset + sizeof(struct jffs2_raw_inode), &len, &tmp);
+ tmp[jNode->csize] = '\0';
+ break;
+ }
+ }
+ /* ok so the name of the new file to find is in tmp */
+ /* if it starts with a slash it is root based else shared dirs */
+ if (tmp[0] == '/')
+ pino = 1;
+ else
+ pino = jDirFoundPino;
+
+ return jffs2_1pass_search_inode(pL, tmp, pino);
+}
+
+static u32
+jffs2_1pass_search_list_inodes(struct b_lists * pL, const char *fname, u32 pino)
+{
+ int i;
+ char tmp[256];
+ char working_tmp[256];
+ char *c;
+
+ /* discard any leading slash */
+ i = 0;
+ while (fname[i] == '/')
+ i++;
+ strcpy(tmp, &fname[i]);
+ working_tmp[0] = '\0';
+ while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
+ {
+ strncpy(working_tmp, tmp, c - tmp);
+ working_tmp[c - tmp] = '\0';
+ for (i = 0; i < strlen(c) - 1; i++)
+ tmp[i] = c[i + 1];
+ tmp[i] = '\0';
+ /* only a failure if we arent looking at top level */
+ if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino)) &&
+ (working_tmp[0])) {
+ putstr("find_inode failed for name=");
+ putstr(working_tmp);
+ putstr("\r\n");
+ return 0;
+ }
+ }
+
+ if (tmp[0] && !(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
+ putstr("find_inode failed for name=");
+ putstr(tmp);
+ putstr("\r\n");
+ return 0;
+ }
+ /* this is for the bare filename, directories have already been mapped */
+ if (!(pino = jffs2_1pass_list_inodes(pL, pino))) {
+ putstr("find_inode failed for name=");
+ putstr(tmp);
+ putstr("\r\n");
+ return 0;
+ }
+ return pino;
+
+}
+
+unsigned char
+jffs2_1pass_rescan_needed(struct part_info *part)
+{
+ struct b_node *b;
+ struct jffs2_unknown_node onode;
+ struct jffs2_unknown_node *node;
+ struct b_lists *pL = (struct b_lists *)part->jffs2_priv;
+
+ if (part->jffs2_priv == 0){
+ DEBUGF ("rescan: First time in use\n");
+ return 1;
+ }
+ /* if we have no list, we need to rescan */
+ if (pL->frag.listCount == 0) {
+ DEBUGF ("rescan: fraglist zero\n");
+ return 1;
+ }
+
+ /* or if we are scanning a new partition */
+ if (pL->partOffset != part->offset) {
+ DEBUGF ("rescan: different partition\n");
+ return 1;
+ }
+
+#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND)
+ if (nanddev != (int)part->usr_priv - 1) {
+ DEBUGF ("rescan: nand device changed\n");
+ return -1;
+ }
+#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */
+ /* FIXME */
+#if 0
+ /* but suppose someone reflashed a partition at the same offset... */
+ b = pL->dir.listHead;
+ while (b) {
+ node = (struct jffs2_unknown_node *) get_fl_mem(b->offset,
+ sizeof(onode), &onode);
+ if (node->nodetype != JFFS2_NODETYPE_DIRENT) {
+ DEBUGF ("rescan: fs changed beneath me? (%lx)\n",
+ (unsigned long) b->offset);
+ return 1;
+ }
+ b = b->next;
+ }
+#endif
+ return 0;
+}
+
+#ifdef DEBUG_FRAGMENTS
+static void
+dump_fragments(struct b_lists *pL)
+{
+ struct b_node *b;
+ struct jffs2_raw_inode ojNode;
+ struct jffs2_raw_inode *jNode;
+
+ putstr("\r\n\r\n******The fragment Entries******\r\n");
+ b = pL->frag.listHead;
+ while (b) {
+ jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
+ sizeof(ojNode), &ojNode);
+ putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset);
+ putLabeledWord("\tbuild_list: totlen = ", jNode->totlen);
+ putLabeledWord("\tbuild_list: inode = ", jNode->ino);
+ putLabeledWord("\tbuild_list: version = ", jNode->version);
+ putLabeledWord("\tbuild_list: isize = ", jNode->isize);
+ putLabeledWord("\tbuild_list: atime = ", jNode->atime);
+ putLabeledWord("\tbuild_list: offset = ", jNode->offset);
+ putLabeledWord("\tbuild_list: csize = ", jNode->csize);
+ putLabeledWord("\tbuild_list: dsize = ", jNode->dsize);
+ putLabeledWord("\tbuild_list: compr = ", jNode->compr);
+ putLabeledWord("\tbuild_list: usercompr = ", jNode->usercompr);
+ putLabeledWord("\tbuild_list: flags = ", jNode->flags);
+ putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */
+ b = b->next;
+ }
+}
+#endif
+
+#ifdef DEBUG_DIRENTS
+static void
+dump_dirents(struct b_lists *pL)
+{
+ struct b_node *b;
+ struct jffs2_raw_dirent *jDir;
+
+ putstr("\r\n\r\n******The directory Entries******\r\n");
+ b = pL->dir.listHead;
+ while (b) {
+ jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset);
+ putstr("\r\n");
+ putnstr(jDir->name, jDir->nsize);
+ putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
+ putLabeledWord("\tbuild_list: nodetype = ", jDir->nodetype);
+ putLabeledWord("\tbuild_list: hdr_crc = ", jDir->hdr_crc);
+ putLabeledWord("\tbuild_list: pino = ", jDir->pino);
+ putLabeledWord("\tbuild_list: version = ", jDir->version);
+ putLabeledWord("\tbuild_list: ino = ", jDir->ino);
+ putLabeledWord("\tbuild_list: mctime = ", jDir->mctime);
+ putLabeledWord("\tbuild_list: nsize = ", jDir->nsize);
+ putLabeledWord("\tbuild_list: type = ", jDir->type);
+ putLabeledWord("\tbuild_list: node_crc = ", jDir->node_crc);
+ putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc);
+ putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */
+ b = b->next;
+ put_fl_mem(jDir);
+ }
+}
+#endif
+
+static int
+jffs2_fill_scan_buf(nand_info_t *nand, unsigned char *buf,
+ unsigned ofs, unsigned len)
+{
+ int ret;
+ unsigned olen;
+
+ olen = len;
+ ret = nand_read(nand, ofs, &olen, buf);
+ if (ret) {
+ printf("nand_read(0x%x bytes from 0x%x) returned %d\n", len, ofs, ret);
+ return ret;
+ }
+ if (olen < len) {
+ printf("Read at 0x%x gave only 0x%x bytes\n", ofs, olen);
+ return -1;
+ }
+ return 0;
+}
+
+#define EMPTY_SCAN_SIZE 1024
+static u32
+jffs2_1pass_build_lists(struct part_info * part)
+{
+ struct b_lists *pL;
+ struct jffs2_unknown_node *node;
+ unsigned nr_blocks, sectorsize, ofs, offset;
+ char *buf;
+ int i;
+ u32 counter = 0;
+ u32 counter4 = 0;
+ u32 counterF = 0;
+ u32 counterN = 0;
+
+#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND)
+ nanddev = (int)part->usr_priv - 1;
+ nand = &nand_info[nanddev];
+#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */
+
+ /* if we are building a list we need to refresh the cache. */
+ jffs_init_1pass_list(part);
+ pL = (struct b_lists *)part->jffs2_priv;
+ pL->partOffset = part->offset;
+ puts ("Scanning JFFS2 FS: ");
+
+ sectorsize = nand->erasesize;
+ nr_blocks = part->size / sectorsize;
+ buf = malloc(sectorsize);
+ if (!buf)
+ return 0;
+
+ for (i = 0; i < nr_blocks; i++) {
+ printf("\b\b%c ", spinner[counter++ % sizeof(spinner)]);
+
+ offset = part->offset + i * sectorsize;
+
+ if (nand_block_isbad(nand, offset))
+ continue;
+
+ if (jffs2_fill_scan_buf(nand, buf, offset, EMPTY_SCAN_SIZE))
+ return 0;
+
+ ofs = 0;
+ /* Scan only 4KiB of 0xFF before declaring it's empty */
+ while (ofs < EMPTY_SCAN_SIZE && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
+ ofs += 4;
+ if (ofs == EMPTY_SCAN_SIZE)
+ continue;
+
+ if (jffs2_fill_scan_buf(nand, buf + EMPTY_SCAN_SIZE, offset + EMPTY_SCAN_SIZE, sectorsize - EMPTY_SCAN_SIZE))
+ return 0;
+ offset += ofs;
+
+ while (ofs < sectorsize - sizeof(struct jffs2_unknown_node)) {
+ node = (struct jffs2_unknown_node *)&buf[ofs];
+ if (node->magic != JFFS2_MAGIC_BITMASK || !hdr_crc(node)) {
+ offset += 4;
+ ofs += 4;
+ counter4++;
+ continue;
+ }
+ /* if its a fragment add it */
+ if (node->nodetype == JFFS2_NODETYPE_INODE &&
+ inode_crc((struct jffs2_raw_inode *) node)) {
+ if (insert_inode(&pL->frag, (struct jffs2_raw_inode *) node,
+ offset) == NULL) {
+ return 0;
+ }
+ } else if (node->nodetype == JFFS2_NODETYPE_DIRENT &&
+ dirent_crc((struct jffs2_raw_dirent *) node) &&
+ dirent_name_crc((struct jffs2_raw_dirent *) node)) {
+ if (! (counterN%100))
+ puts ("\b\b. ");
+ if (insert_dirent(&pL->dir, (struct jffs2_raw_dirent *) node,
+ offset) == NULL) {
+ return 0;
+ }
+ counterN++;
+ } else if (node->nodetype == JFFS2_NODETYPE_CLEANMARKER) {
+ if (node->totlen != sizeof(struct jffs2_unknown_node))
+ printf("OOPS Cleanmarker has bad size "
+ "%d != %d\n", node->totlen,
+ sizeof(struct jffs2_unknown_node));
+ } else if (node->nodetype == JFFS2_NODETYPE_PADDING) {
+ if (node->totlen < sizeof(struct jffs2_unknown_node))
+ printf("OOPS Padding has bad size "
+ "%d < %d\n", node->totlen,
+ sizeof(struct jffs2_unknown_node));
+ } else {
+ printf("Unknown node type: %x len %d "
+ "offset 0x%x\n", node->nodetype,
+ node->totlen, offset);
+ }
+ offset += ((node->totlen + 3) & ~3);
+ ofs += ((node->totlen + 3) & ~3);
+ counterF++;
+ }
+ }
+
+ putstr("\b\b done.\r\n"); /* close off the dots */
+
+#if 0
+ putLabeledWord("dir entries = ", pL->dir.listCount);
+ putLabeledWord("frag entries = ", pL->frag.listCount);
+ putLabeledWord("+4 increments = ", counter4);
+ putLabeledWord("+file_offset increments = ", counterF);
+#endif
+
+#ifdef DEBUG_DIRENTS
+ dump_dirents(pL);
+#endif
+
+#ifdef DEBUG_FRAGMENTS
+ dump_fragments(pL);
+#endif
+
+ /* give visual feedback that we are done scanning the flash */
+ led_blink(0x0, 0x0, 0x1, 0x1); /* off, forever, on 100ms, off 100ms */
+ free(buf);
+
+ return 1;
+}
+
+
+static u32
+jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL)
+{
+ struct b_node *b;
+ struct jffs2_raw_inode ojNode;
+ struct jffs2_raw_inode *jNode;
+ int i;
+
+ for (i = 0; i < JFFS2_NUM_COMPR; i++) {
+ piL->compr_info[i].num_frags = 0;
+ piL->compr_info[i].compr_sum = 0;
+ piL->compr_info[i].decompr_sum = 0;
+ }
+/* FIXME
+ b = pL->frag.listHead;
+ while (b) {
+ jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
+ sizeof(ojNode), &ojNode);
+ if (jNode->compr < JFFS2_NUM_COMPR) {
+ piL->compr_info[jNode->compr].num_frags++;
+ piL->compr_info[jNode->compr].compr_sum += jNode->csize;
+ piL->compr_info[jNode->compr].decompr_sum += jNode->dsize;
+ }
+ b = b->next;
+ }
+*/
+ return 0;
+}
+
+
+static struct b_lists *
+jffs2_get_list(struct part_info * part, const char *who)
+{
+ if (jffs2_1pass_rescan_needed(part)) {
+ if (!jffs2_1pass_build_lists(part)) {
+ printf("%s: Failed to scan JFFSv2 file structure\n", who);
+ return NULL;
+ }
+ }
+ return (struct b_lists *)part->jffs2_priv;
+}
+
+
+/* Print directory / file contents */
+u32
+jffs2_1pass_ls(struct part_info * part, const char *fname)
+{
+ struct b_lists *pl;
+ long ret = 0;
+ u32 inode;
+
+ if (! (pl = jffs2_get_list(part, "ls")))
+ return 0;
+
+ if (! (inode = jffs2_1pass_search_list_inodes(pl, fname, 1))) {
+ putstr("ls: Failed to scan jffs2 file structure\r\n");
+ return 0;
+ }
+
+#if 0
+ putLabeledWord("found file at inode = ", inode);
+ putLabeledWord("read_inode returns = ", ret);
+#endif
+
+ return ret;
+}
+
+
+/* Load a file from flash into memory. fname can be a full path */
+u32
+jffs2_1pass_load(char *dest, struct part_info * part, const char *fname)
+{
+
+ struct b_lists *pl;
+ long ret = 0;
+ u32 inode;
+
+ if (! (pl = jffs2_get_list(part, "load")))
+ return 0;
+
+ if (! (inode = jffs2_1pass_search_inode(pl, fname, 1))) {
+ putstr("load: Failed to find inode\r\n");
+ return 0;
+ }
+
+ /* Resolve symlinks */
+ if (! (inode = jffs2_1pass_resolve_inode(pl, inode))) {
+ putstr("load: Failed to resolve inode structure\r\n");
+ return 0;
+ }
+
+ if ((ret = jffs2_1pass_read_inode(pl, inode, dest, NULL)) < 0) {
+ putstr("load: Failed to read inode\r\n");
+ return 0;
+ }
+
+ DEBUGF ("load: loaded '%s' to 0x%lx (%ld bytes)\n", fname,
+ (unsigned long) dest, ret);
+ return ret;
+}
+
+/* Return information about the fs on this partition */
+u32
+jffs2_1pass_info(struct part_info * part)
+{
+ struct b_jffs2_info info;
+ struct b_lists *pl;
+ int i;
+
+ if (! (pl = jffs2_get_list(part, "info")))
+ return 0;
+
+ jffs2_1pass_fill_info(pl, &info);
+ for (i = 0; i < JFFS2_NUM_COMPR; i++) {
+ printf ("Compression: %s\n"
+ "\tfrag count: %d\n"
+ "\tcompressed sum: %d\n"
+ "\tuncompressed sum: %d\n",
+ compr_names[i],
+ info.compr_info[i].num_frags,
+ info.compr_info[i].compr_sum,
+ info.compr_info[i].decompr_sum);
+ }
+ return 1;
+}
+
+#endif /* CFG_CMD_JFFS2 */
diff --git a/fs/jffs2/jffs2_nand_private.h b/fs/jffs2/jffs2_nand_private.h
new file mode 100644
index 0000000..18cca8d
--- /dev/null
+++ b/fs/jffs2/jffs2_nand_private.h
@@ -0,0 +1,133 @@
+#ifndef jffs2_private_h
+#define jffs2_private_h
+
+#include <jffs2/jffs2.h>
+
+struct b_node {
+ struct b_node *next;
+};
+
+struct b_inode {
+ struct b_inode *next;
+ u32 offset; /* physical offset to beginning of real inode */
+ u32 version;
+ u32 ino;
+ u32 isize;
+ u32 csize;
+};
+
+struct b_dirent {
+ struct b_dirent *next;
+ u32 offset; /* physical offset to beginning of real dirent */
+ u32 version;
+ u32 pino;
+ u32 ino;
+ unsigned int nhash;
+ unsigned char nsize;
+ unsigned char type;
+};
+
+struct b_list {
+ struct b_node *listTail;
+ struct b_node *listHead;
+ unsigned int listCount;
+ struct mem_block *listMemBase;
+};
+
+struct b_lists {
+ char *partOffset;
+ struct b_list dir;
+ struct b_list frag;
+};
+
+struct b_compr_info {
+ u32 num_frags;
+ u32 compr_sum;
+ u32 decompr_sum;
+};
+
+struct b_jffs2_info {
+ struct b_compr_info compr_info[JFFS2_NUM_COMPR];
+};
+
+static inline int
+hdr_crc(struct jffs2_unknown_node *node)
+{
+#if 1
+ u32 crc = crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_unknown_node) - 4);
+#else
+ /* what's the semantics of this? why is this here? */
+ u32 crc = crc32_no_comp(~0, (unsigned char *)node, sizeof(struct jffs2_unknown_node) - 4);
+
+ crc ^= ~0;
+#endif
+ if (node->hdr_crc != crc) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
+
+static inline int
+dirent_crc(struct jffs2_raw_dirent *node)
+{
+ if (node->node_crc != crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_raw_dirent) - 8)) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
+
+static inline int
+dirent_name_crc(struct jffs2_raw_dirent *node)
+{
+ if (node->name_crc != crc32_no_comp(0, (unsigned char *)&(node->name), node->nsize)) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
+
+static inline int
+inode_crc(struct jffs2_raw_inode *node)
+{
+ if (node->node_crc != crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_raw_inode) - 8)) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
+
+/* Borrowed from include/linux/dcache.h */
+
+/* Name hashing routines. Initial hash value */
+/* Hash courtesy of the R5 hash in reiserfs modulo sign bits */
+#define init_name_hash() 0
+
+/* partial hash update function. Assume roughly 4 bits per character */
+static inline unsigned long
+partial_name_hash(unsigned long c, unsigned long prevhash)
+{
+ return (prevhash + (c << 4) + (c >> 4)) * 11;
+}
+
+/*
+ * Finally: cut down the number of bits to a int value (and try to avoid
+ * losing bits)
+ */
+static inline unsigned long end_name_hash(unsigned long hash)
+{
+ return (unsigned int) hash;
+}
+
+/* Compute the hash for a name string. */
+static inline unsigned int
+full_name_hash(const unsigned char *name, unsigned int len)
+{
+ unsigned long hash = init_name_hash();
+ while (len--)
+ hash = partial_name_hash(*name++, hash);
+ return end_name_hash(hash);
+}
+
+#endif /* jffs2_private.h */