kernel/git/stable/linux.git/fs/btrfs/backref.h, branch linux-5.8.y

btrfs: rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE

2020-05-25T09:25:35+00:00

The name BTRFS_ROOT_REF_COWS is not very clear about the meaning. In fact, that bit can only be set to those trees: - Subvolume roots - Data reloc root - Reloc roots for above roots All other trees won't get this bit set. So just by the result, it is obvious that, roots with this bit set can have tree blocks shared with other trees. Either shared by snapshots, or by reloc roots (an special snapshot created by relocation). This patch will rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE to make it easier to understand, and update all comment mentioning "reference counted" to follow the rename. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: reloc: move error handling of build_backref_tree() to backref.c

2020-05-25T09:25:21+00:00

The error cleanup will be extracted as a new function, btrfs_backref_error_cleanup(), and moved to backref.c and exported for later usage. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move finish_upper_links()

2020-05-25T09:25:21+00:00

This the the 2nd major part of generic backref cache. Move it to backref.c so we can reuse it. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move handle_one_tree_block()

2020-05-25T09:25:21+00:00

This function is the major part of backref cache build process, move it to backref.c so we can reuse it later. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move backref_tree_panic()

2020-05-25T09:25:21+00:00

Also change the parameter, since all callers can easily grab an fs_info, there is no need for all the pointer chasing. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move backref_cache_cleanup()

2020-05-25T09:25:20+00:00

Since we're releasing all existing nodes/edges, other than cleanup the mess after error, "release" is a more proper naming here. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move remove_backref_node()

2020-05-25T09:25:20+00:00

Also add comment explaining the cleanup progress, to differ it from btrfs_backref_drop_node(). Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move drop_backref_node()

2020-05-25T09:25:20+00:00

With extra comment for drop_backref_node() as it has some similarity with remove_backref_node(), thus we need extra comment explaining the difference. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move free_backref_(node|edge)

2020-05-25T09:25:20+00:00

Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: backref: rename and move link_backref_edge()

2020-05-25T09:25:20+00:00

Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba