When the end of an extent exceeds the end of the specified range,
the extent will be accidentally truncated.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
---
fs/btrfs/free-space-cache.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 292c0d9..185cf8e 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2509,8 +2509,15 @@ int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
bytes = min(entry->bytes, end - start);
if (bytes < minlen)
goto next;
+
unlink_free_space(ctl, entry);
- kmem_cache_free(btrfs_free_space_cachep, entry);
+ if (bytes < entry->bytes) {
+ entry->offset = entry->offset + bytes;
+ entry->bytes = entry->bytes - bytes;
+ link_free_space(ctl, entry);
+ } else {
+ kmem_cache_free(btrfs_free_space_cachep, entry);
+ }
}
spin_unlock(&ctl->tree_lock);
-- 1.7.3.1
--
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