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authorZhao Lei <zhaolei@cn.fujitsu.com>2015-01-20 07:11:44 (GMT)
committerChris Mason <clm@fb.com>2015-01-22 02:06:49 (GMT)
commitffe2d2034bbb34f49f76c808550fdfbea2ea1659 (patch)
treee77f446b2628d80cff892f604da7ffa292e892ee /fs/btrfs/volumes.c
parent10f11900167a83e0c229c4c27e73e720ebd55b5c (diff)
downloadlinux-ffe2d2034bbb34f49f76c808550fdfbea2ea1659.tar.xz
Btrfs: Introduce BTRFS_BLOCK_GROUP_RAID56_MASK to check raid56 simply
So we can check raid56 with: (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) instead of long: (map->type & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c24
1 files changed, 9 insertions, 15 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 8933d70..da7e0e1 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4196,7 +4196,7 @@ static u32 find_raid56_stripe_len(u32 data_devices, u32 dev_stripe_target)
static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
{
- if (!(type & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)))
+ if (!(type & BTRFS_BLOCK_GROUP_RAID56_MASK))
return;
btrfs_set_fs_incompat(info, RAID56);
@@ -4803,10 +4803,8 @@ unsigned long btrfs_full_stripe_len(struct btrfs_root *root,
BUG_ON(em->start > logical || em->start + em->len < logical);
map = (struct map_lookup *)em->bdev;
- if (map->type & (BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6)) {
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
len = map->stripe_len * nr_data_stripes(map);
- }
free_extent_map(em);
return len;
}
@@ -4826,8 +4824,7 @@ int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree,
BUG_ON(em->start > logical || em->start + em->len < logical);
map = (struct map_lookup *)em->bdev;
- if (map->type & (BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6))
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
ret = 1;
free_extent_map(em);
return ret;
@@ -4998,7 +4995,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
stripe_offset = offset - stripe_offset;
/* if we're here for raid56, we need to know the stripe aligned start */
- if (map->type & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
unsigned long full_stripe_len = stripe_len * nr_data_stripes(map);
raid56_full_stripe_start = offset;
@@ -5011,8 +5008,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
if (rw & REQ_DISCARD) {
/* we don't discard raid56 yet */
- if (map->type &
- (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
ret = -EOPNOTSUPP;
goto out;
}
@@ -5022,7 +5018,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
/* For writes to RAID[56], allow a full stripeset across all disks.
For other RAID types and for RAID[56] reads, just allow a single
stripe (on a single disk). */
- if (map->type & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6) &&
+ if ((map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) &&
(rw & REQ_WRITE)) {
max_len = stripe_len * nr_data_stripes(map) -
(offset - raid56_full_stripe_start);
@@ -5188,8 +5184,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
mirror_num = stripe_index - old_stripe_index + 1;
}
- } else if (map->type & (BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6)) {
+ } else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
if (need_raid_map &&
((rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) ||
mirror_num > 1)) {
@@ -5253,7 +5248,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
bbio->tgtdev_map = (int *)(bbio->stripes + num_alloc_stripes);
/* build raid_map */
- if (map->type & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6) &&
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK &&
need_raid_map && ((rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) ||
mirror_num > 1)) {
u64 tmp;
@@ -5534,8 +5529,7 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
do_div(length, map->num_stripes / map->sub_stripes);
else if (map->type & BTRFS_BLOCK_GROUP_RAID0)
do_div(length, map->num_stripes);
- else if (map->type & (BTRFS_BLOCK_GROUP_RAID5 |
- BTRFS_BLOCK_GROUP_RAID6)) {
+ else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
do_div(length, nr_data_stripes(map));
rmap_len = map->stripe_len * nr_data_stripes(map);
}