diff mbox series

[02/13] btrfs: quit early if the fs has no RAID56 support for raid56 related checks

Message ID a8bfb1a0424fbdc2054d7c0a74a7ce33dbe570cb.1651559986.git.wqu@suse.com (mailing list archive)
State New, archived
Headers show
Series btrfs: make read repair work in synchronous mode | expand

Commit Message

Qu Wenruo May 3, 2022, 6:49 a.m. UTC 
The following functions do special handling for RAID56 chunks:

- btrfs_is_parity_mirror()
  Check if the range is in RAID56 chunks.

- btrfs_full_stripe_len()
  Either return sectorsize for non-RAID56 profiles or full stripe length
  for RAID56 chunks.

But if a filesystem without any RAID56 chunks, it will not have RAID56
incompt flags, and we can skip the chunk tree looking up completely.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/volumes.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index eeddd5256411..a66541ef3b18 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5781,6 +5781,9 @@  unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info,
 	struct map_lookup *map;
 	unsigned long len = fs_info->sectorsize;
 
+	if (!btrfs_fs_incompat(fs_info, RAID56))
+		return len;
+
 	em = btrfs_get_chunk_map(fs_info, logical, len);
 
 	if (!WARN_ON(IS_ERR(em))) {
@@ -5798,6 +5801,9 @@  int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
 	struct map_lookup *map;
 	int ret = 0;
 
+	if (!btrfs_fs_incompat(fs_info, RAID56))
+		return 0;
+
 	em = btrfs_get_chunk_map(fs_info, logical, len);
 
 	if(!WARN_ON(IS_ERR(em))) {