commit d85f959507ec92b4e321d29985e85bd1d92b8bfc
author Qu Wenruo <wqu@suse.com> Wed Jun 24 18:02:55 2020 +0200
committer Tom Rini <trini@konsulko.com> Mon Sep 07 20:57:27 2020 -0400
tree 9d8fa004e9265b872cb2ce9df1e2f49c15bf1d87
parent f6377ffaffe71f0fecffeeccc4f1c3f784ff1510

fs: btrfs: Crossport read_tree_block() from btrfs-progs

This is the one of the basic stone function for btrfs, which:
- Resolves the chunk mappings
- Reads data from disk
- Does various sanity check

With read_tree_block(), we can finally crossport needed btrfs btree
operations to U-Boot.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>

fs/btrfs/disk-io.h

diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 35b9293..ca731a5 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -10,9 +10,23 @@
 #define BTRFS_SUPER_INFO_OFFSET SZ_64K
 #define BTRFS_SUPER_INFO_SIZE	SZ_4K
 
-int btrfs_csum_data(u16 csum_type, const u8 *data, u8 *out, size_t len);
+/* U-boot specific */
+int btrfs_read_superblock(void);
 
+/* From btrfs-progs */
+int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror);
+struct extent_buffer* read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
+		u64 parent_transid);
+
+struct extent_buffer* btrfs_find_create_tree_block(
+		struct btrfs_fs_info *fs_info, u64 bytenr);
+struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info,
+					    u64 bytenr, u32 blocksize);
 int btrfs_read_dev_super(struct blk_desc *desc, struct disk_partition *part,
 			 struct btrfs_super_block *sb);
-int btrfs_read_superblock(void);
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
+int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
+int btrfs_csum_data(u16 csum_type, const u8 *data, u8 *out, size_t len);
+int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize,
+			 int verify, u16 csum_type);
 #endif