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btrfs: scrub: factor out common scrub_stripe constraints

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There are common values set for the stripe constraints, some of them
are already factored out. Do that for increment and mirror_num as well.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2019-11-28 15:37:46 +01:00
parent 1aeb6b563a
commit 7735cd755b
1 changed files with 2 additions and 7 deletions
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9
fs/btrfs/scrub.c
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@ -3204,28 +3204,23 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
physical = map->stripes[num].physical;
offset = 0;
nstripes = div64_u64(length, map->stripe_len);
mirror_num = 1;
increment = map->stripe_len;
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
offset = map->stripe_len * num;
increment = map->stripe_len * map->num_stripes;
mirror_num = 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID10) {
int factor = map->num_stripes / map->sub_stripes;
offset = map->stripe_len * (num / map->sub_stripes);
increment = map->stripe_len * factor;
mirror_num = num % map->sub_stripes + 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
increment = map->stripe_len;
mirror_num = num % map->num_stripes + 1;
} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
increment = map->stripe_len;
mirror_num = num % map->num_stripes + 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
get_raid56_logic_offset(physical, num, map, &offset, NULL);
increment = map->stripe_len * nr_data_stripes(map);
mirror_num = 1;
} else {
increment = map->stripe_len;
mirror_num = 1;
}
path = btrfs_alloc_path();