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btrfs: clean up and optimize __check_raid_min_device() 

__check_raid_min_device() which was pealed from btrfs_rm_device()
maintianed its original code to show the block move. This patch cleans up
__check_raid_min_device().

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2016-02-13 10:01:34 +08:00 committed by David Sterba
parent f1fa7f2642
commit bd45ffbcb1
1 changed files with 21 additions and 26 deletions
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47
fs/btrfs/volumes.c
View File

@ -1705,52 +1705,47 @@ out:
return ret;
}
static int __check_raid_min_devices(struct btrfs_root *root)
static int __check_raid_min_devices(struct btrfs_fs_info *fs_info)
{
u64 all_avail;
u64 num_devices;
unsigned seq;
int ret = 0;
num_devices = root->fs_info->fs_devices->num_devices;
btrfs_dev_replace_lock(&root->fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) {
num_devices = fs_info->fs_devices->num_devices;
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) {
WARN_ON(num_devices < 1);
num_devices--;
}
btrfs_dev_replace_unlock(&root->fs_info->dev_replace, 0);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
do {
seq = read_seqbegin(&root->fs_info->profiles_lock);
seq = read_seqbegin(&fs_info->profiles_lock);
all_avail = root->fs_info->avail_data_alloc_bits |
root->fs_info->avail_system_alloc_bits |
root->fs_info->avail_metadata_alloc_bits;
} while (read_seqretry(&root->fs_info->profiles_lock, seq));
all_avail = fs_info->avail_data_alloc_bits |
fs_info->avail_system_alloc_bits |
fs_info->avail_metadata_alloc_bits;
} while (read_seqretry(&fs_info->profiles_lock, seq));
if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) {
ret = BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET;
goto out;
return BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET;
}
if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) && num_devices <= 2) {
ret = BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET;
goto out;
return BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET;
}
if ((all_avail & BTRFS_BLOCK_GROUP_RAID5) &&
root->fs_info->fs_devices->rw_devices <= 2) {
ret = BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET;
goto out;
}
if ((all_avail & BTRFS_BLOCK_GROUP_RAID6) &&
root->fs_info->fs_devices->rw_devices <= 3) {
ret = BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET;
goto out;
fs_info->fs_devices->rw_devices <= 2) {
return BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET;
}
out:
return ret;
if ((all_avail & BTRFS_BLOCK_GROUP_RAID6) &&
fs_info->fs_devices->rw_devices <= 3) {
return BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET;
}
return 0;
}
int btrfs_rm_device(struct btrfs_root *root, char *device_path)
@ -1769,7 +1764,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
mutex_lock(&uuid_mutex);
ret = __check_raid_min_devices(root);
ret = __check_raid_min_devices(root->fs_info);
if (ret)
goto out;