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btrfs: assert tree lock is held when searching for free space entries

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When searching for a free space entry by offset, at tree_search_offset(),
we are supposed to have the btrfs_free_space_ctl's 'tree_lock' held, so
assert that. We have multiple callers of tree_search_offset(), and all
currently hold the necessary lock before calling it.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2023-05-04 12:04:24 +01:00 committed by David Sterba
parent 13c2018fcc
commit 91de9e978d
1 changed files with 2 additions and 0 deletions
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2
fs/btrfs/free-space-cache.c
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@ -1721,6 +1721,8 @@ tree_search_offset(struct btrfs_free_space_ctl *ctl,
struct rb_node *n = ctl->free_space_offset.rb_node;
struct btrfs_free_space *entry = NULL, *prev = NULL;
lockdep_assert_held(&ctl->tree_lock);
/* find entry that is closest to the 'offset' */
while (n) {
entry = rb_entry(n, struct btrfs_free_space, offset_index);