From abed4aaae4f71a7bcdbe90a65319b6e772a2689d Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 5 Nov 2021 16:45:51 -0400 Subject: btrfs: track the csum, extent, and free space trees in a rb tree In the future we are going to have multiple copies of these trees. To facilitate this we need a way to lookup the different roots we are looking for. Handle this by adding a global root rb tree that is indexed on the root->root_key. Then instead of loading the roots at mount time with individually targeted keys, simply search the tree_root for anything with the specific objectid we want. This will make it straightforward to support both old style and new style file systems. Signed-off-by: Josef Bacik Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/disk-io.h | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) (limited to 'fs/btrfs/disk-io.h') diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index a4d1788acd24..5e8bef4b7563 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -71,6 +71,12 @@ struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info, struct btrfs_path *path, u64 objectid); +int btrfs_global_root_insert(struct btrfs_root *root); +void btrfs_global_root_delete(struct btrfs_root *root); +struct btrfs_root *btrfs_global_root(struct btrfs_fs_info *fs_info, + struct btrfs_key *key); +struct btrfs_root *btrfs_csum_root(struct btrfs_fs_info *fs_info, u64 bytenr); +struct btrfs_root *btrfs_extent_root(struct btrfs_fs_info *fs_info, u64 bytenr); void btrfs_free_fs_info(struct btrfs_fs_info *fs_info); int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); @@ -103,18 +109,6 @@ static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root) return NULL; } -static inline struct btrfs_root *btrfs_extent_root(struct btrfs_fs_info *fs_info, - u64 bytenr) -{ - return fs_info->_extent_root; -} - -static inline struct btrfs_root *btrfs_csum_root(struct btrfs_fs_info *fs_info, - u64 bytenr) -{ - return fs_info->_csum_root; -} - static inline struct btrfs_root *btrfs_block_group_root(struct btrfs_fs_info *fs_info) { return btrfs_extent_root(fs_info, 0); -- cgit v1.2.1