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-rw-r--r--fs/btrfs/relocation.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 71b4b70f56b9..8a2c2a07987b 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3040,6 +3040,7 @@ int prealloc_file_extent_cluster(struct inode *inode,
int ret = 0;
u64 prealloc_start = cluster->start - offset;
u64 prealloc_end = cluster->end - offset;
+ u64 cur_offset;
BUG_ON(cluster->start != cluster->boundary[0]);
inode_lock(inode);
@@ -3049,6 +3050,7 @@ int prealloc_file_extent_cluster(struct inode *inode,
if (ret)
goto out;
+ cur_offset = prealloc_start;
while (nr < cluster->nr) {
start = cluster->boundary[nr] - offset;
if (nr + 1 < cluster->nr)
@@ -3058,16 +3060,21 @@ int prealloc_file_extent_cluster(struct inode *inode,
lock_extent(&BTRFS_I(inode)->io_tree, start, end);
num_bytes = end + 1 - start;
+ if (cur_offset < start)
+ btrfs_free_reserved_data_space(inode, cur_offset,
+ start - cur_offset);
ret = btrfs_prealloc_file_range(inode, 0, start,
num_bytes, num_bytes,
end + 1, &alloc_hint);
+ cur_offset = end + 1;
unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
if (ret)
break;
nr++;
}
- btrfs_free_reserved_data_space(inode, prealloc_start,
- prealloc_end + 1 - prealloc_start);
+ if (cur_offset < prealloc_end)
+ btrfs_free_reserved_data_space(inode, cur_offset,
+ prealloc_end + 1 - cur_offset);
out:
inode_unlock(inode);
return ret;