__btrfs_map_block() should return all mirror on WRITE,
REQ_GET_READ_MIRRORS, and RECOVERY case, whether need_raid_map set
or not.
need_raid_map only used to control is to set bbio->raid_map.
Current code works right because there is only one caller can
trigger above bug, which is readahead, and this function happened
to bypass on less mirror.
Signed-off-by: Zhao Lei <zhaolei@xxxxxxxxxxxxxx>
---
fs/btrfs/volumes.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index a6df8fd..4ee429b 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5464,9 +5464,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
}
} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
- if (need_raid_map &&
- ((rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) ||
- mirror_num > 1)) {
+ if ((rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) ||
+ mirror_num > 1) {
/* push stripe_nr back to the start of the full stripe */
stripe_nr = div_u64(raid56_full_stripe_start,
stripe_len * nr_data_stripes(map));
--
1.8.5.1
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