diff options
| -rw-r--r-- | fs/btrfs/volumes.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 77d7fbc0fa47..63e632746d8a 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5073,6 +5073,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, num_stripes = min_t(u64, map->num_stripes, stripe_nr_end - stripe_nr_orig); stripe_index = do_div(stripe_nr, map->num_stripes); + if (!(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS))) + mirror_num = 1; } else if (map->type & BTRFS_BLOCK_GROUP_RAID1) { if (rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) num_stripes = map->num_stripes; @@ -5176,6 +5178,9 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, /* We distribute the parity blocks across stripes */ tmp = stripe_nr + stripe_index; stripe_index = do_div(tmp, map->num_stripes); + if (!(rw & (REQ_WRITE | REQ_DISCARD | + REQ_GET_READ_MIRRORS)) && mirror_num <= 1) + mirror_num = 1; } } else { /* |