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btrfs: use raid_attr table in get_profile_num_devs 

The dev_max constraints are defined in the raid_attr table, use it
instead of open-coding it.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2019-05-17 11:43:20 +02:00
parent c8bf1b6703
commit 9fa02ac75b
1 changed files with 2 additions and 8 deletions
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10
fs/btrfs/extent-tree.c
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@ -4336,15 +4336,9 @@ static u64 get_profile_num_devs(struct btrfs_fs_info *fs_info, u64 type)
{
u64 num_dev;
if (type & (BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_BLOCK_GROUP_RAID5 |
BTRFS_BLOCK_GROUP_RAID6))
num_dev = btrfs_raid_array[btrfs_bg_flags_to_raid_index(type)].devs_max;
if (!num_dev)
num_dev = fs_info->fs_devices->rw_devices;
else if (type & BTRFS_BLOCK_GROUP_RAID1)
num_dev = 2;
else
num_dev = 1; /* DUP or single */
return num_dev;
}