[v2,3/8] btrfs: fix the qgroup data free range for inline data extents

Commit Message

Qu Wenruo Feb. 27, 2025, 5:54 a.m. UTC

Inside function __cow_file_range_inline() since the inlined data no
longer takes any data space, we need to free up the reserved space.

However the code is still using the old page size == sector size
assumption, and will not handle subpage case well.

Thankfully it is not going to cause any problems because we have two extra
safe nets:

- Inline data extents creation is disable for sector size < page size
  cases for now
  But it won't stay that for long.

- btrfs_qgroup_free_data() will only clear ranges which are already
  reserved
  So even if we pass a range larger than what we need, it should still
  be fine, especially there is only reserved space for a single block at
  file offset 0 for an inline data extent.

But just for the sake of consistentcy, fix the call site to use
sectorsize instead of page size.

Reviewed-by: Filipe Manana <[e-mail]>
Signed-off-by: Qu Wenruo <[e-mail]>
---
 fs/btrfs/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f06b1c78c399..52802a3a078c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -672,7 +672,7 @@  static noinline int __cow_file_range_inline(struct btrfs_inode *inode,
 	 * And at reserve time, it's always aligned to page size, so
 	 * just free one page here.
 	 */
-	btrfs_qgroup_free_data(inode, NULL, 0, PAGE_SIZE, NULL);
+	btrfs_qgroup_free_data(inode, NULL, 0, fs_info->sectorsize, NULL);
 	btrfs_free_path(path);
 	btrfs_end_transaction(trans);
 	return ret;