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btrfs: WARN_ON_ONCE() in our leak detection code

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fstests looks for WARN_ON's in dmesg.  Add WARN_ON_ONCE() to our leak
detection code (enabled only in debug builds) so that fstests will fail
if these things trip at all.  This will allow us to easily catch
problems with our reference counting that may otherwise go unnoticed.

Reviewed-by: Neal Gompa <neal@gompa.dev>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2024-01-02 15:18:07 -05:00 committed by David Sterba
parent 592a0ce9e2
commit 8fd2b12e6a
3 changed files with 3 additions and 0 deletions
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1
fs/btrfs/disk-io.c
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@ -1244,6 +1244,7 @@ void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info)
btrfs_err(fs_info, "leaked root %s refcount %d",
btrfs_root_name(&root->root_key, buf),
refcount_read(&root->refs));
WARN_ON_ONCE(1);
while (refcount_read(&root->refs) > 1)
btrfs_put_root(root);
btrfs_put_root(root);

1
fs/btrfs/extent-io-tree.c
View file

@ -48,6 +48,7 @@ static inline void btrfs_extent_state_leak_debug_check(void)
extent_state_in_tree(state),
refcount_read(&state->refs));
list_del(&state->leak_list);
WARN_ON_ONCE(1);
kmem_cache_free(extent_state_cache, state);
}
}

1
fs/btrfs/extent_io.c
View file

@ -82,6 +82,7 @@ void btrfs_extent_buffer_leak_debug_check(struct btrfs_fs_info *fs_info)
eb->start, eb->len, atomic_read(&eb->refs), eb->bflags,
btrfs_header_owner(eb));
list_del(&eb->leak_list);
WARN_ON_ONCE(1);
kmem_cache_free(extent_buffer_cache, eb);
}
spin_unlock_irqrestore(&fs_info->eb_leak_lock, flags);