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btrfs: Use direct way to determine raid56 write/recover mode 

Old code used bbio->raid_map to determine whether in raid56
write/recover operation, because we didn't't have bbio->map_type.

Now we have direct way for this condition, rid of using
the function-relative data, and make the code more readable.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Zhao Lei 2015-12-15 18:18:09 +08:00 committed by Chris Mason
parent 94a97dfeb6
commit ad1ba2a0c4
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/volumes.c
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@ -6068,7 +6068,8 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
bbio->fs_info = root->fs_info;
atomic_set(&bbio->stripes_pending, bbio->num_stripes);
if (bbio->raid_map) {
if ((bbio->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) &&
((rw & WRITE) || (mirror_num > 1))) {
/* In this case, map_length has been set to the length of
a single stripe; not the whole write */
if (rw & WRITE) {