From b036f47996c5c9b4926d47f31bcd156e16c53617 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Sun, 22 May 2022 13:47:47 +0200 Subject: [PATCH] btrfs: quit early if the fs has no RAID56 support for raid56 related checks 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 incompat flags, and we can skip the chunk tree looking up completely. Reviewed-by: Nikolay Borisov Reviewed-by: Anand Jain Reviewed-by: Johannes Thumshirn Signed-off-by: Qu Wenruo Signed-off-by: Christoph Hellwig Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/volumes.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 9c20049d1fec..a2bb0928dc06 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5768,6 +5768,9 @@ 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))) { @@ -5785,6 +5788,9 @@ 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))) { -- GitLab