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btrfs-progs: introduce init_alloc_chunk_ctl

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Factor out setting of alloc_chuk_ctl fileds in a separate function
init_alloc_chunk_ctl.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2020-06-10 21:32:56 +09:00 committed by David Sterba
parent ed9964895f
commit 2ef15943a0
1 changed files with 40 additions and 30 deletions
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70
volumes.c
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@ -1067,6 +1067,44 @@ static const struct btrfs_raid_profile {
},
};
static void init_alloc_chunk_ctl(struct btrfs_fs_info *info,
struct alloc_chunk_ctl *ctl)
{
int type = ctl->type;
ctl->num_stripes = btrfs_raid_profile_table[type].num_stripes;
ctl->min_stripes = btrfs_raid_profile_table[type].min_stripes;
ctl->sub_stripes = btrfs_raid_profile_table[type].sub_stripes;
ctl->stripe_len = BTRFS_STRIPE_LEN;
switch (type) {
case BTRFS_RAID_RAID1:
case BTRFS_RAID_RAID1C3:
case BTRFS_RAID_RAID1C4:
ctl->num_stripes = min(ctl->min_stripes, ctl->total_devs);
break;
case BTRFS_RAID_RAID0:
ctl->num_stripes = min(ctl->max_stripes, ctl->total_devs);
break;
case BTRFS_RAID_RAID10:
ctl->num_stripes = min(ctl->max_stripes, ctl->total_devs);
ctl->num_stripes &= ~(u32)1;
break;
case BTRFS_RAID_RAID5:
ctl->num_stripes = min(ctl->max_stripes, ctl->total_devs);
ctl->stripe_len = find_raid56_stripe_len(ctl->num_stripes - 1,
btrfs_super_stripesize(info->super_copy));
break;
case BTRFS_RAID_RAID6:
ctl->num_stripes = min(ctl->max_stripes, ctl->total_devs);
ctl->stripe_len = find_raid56_stripe_len(ctl->num_stripes - 2,
btrfs_super_stripesize(info->super_copy));
break;
default:
break;
}
}
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *info, u64 *start,
u64 *num_bytes, u64 type)
@ -1100,11 +1138,7 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
}
ctl.type = btrfs_bg_flags_to_raid_index(type);
ctl.num_stripes = btrfs_raid_profile_table[ctl.type].num_stripes;
ctl.max_stripes = 0;
ctl.min_stripes = btrfs_raid_profile_table[ctl.type].min_stripes;
ctl.sub_stripes = btrfs_raid_profile_table[ctl.type].sub_stripes;
ctl.stripe_len = BTRFS_STRIPE_LEN;
ctl.total_devs = btrfs_super_num_devices(info->super_copy);
if (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
@ -1129,32 +1163,8 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
ctl.max_stripes = BTRFS_MAX_DEVS(info);
}
}
switch (ctl.type) {
case BTRFS_RAID_RAID1:
case BTRFS_RAID_RAID1C3:
case BTRFS_RAID_RAID1C4:
ctl.num_stripes = min(ctl.min_stripes, ctl.total_devs);
break;
case BTRFS_RAID_RAID0:
ctl.num_stripes = min(ctl.max_stripes, ctl.total_devs);
break;
case BTRFS_RAID_RAID10:
ctl.num_stripes = min(ctl.max_stripes, ctl.total_devs);
ctl.num_stripes &= ~(u32)1;
break;
case BTRFS_RAID_RAID5:
ctl.num_stripes = min(ctl.max_stripes, ctl.total_devs);
ctl.stripe_len = find_raid56_stripe_len(ctl.num_stripes - 1,
btrfs_super_stripesize(info->super_copy));
break;
case BTRFS_RAID_RAID6:
ctl.num_stripes = min(ctl.max_stripes, ctl.total_devs);
ctl.stripe_len = find_raid56_stripe_len(ctl.num_stripes - 2,
btrfs_super_stripesize(info->super_copy));
break;
default:
break;
}
init_alloc_chunk_ctl(info, &ctl);
if (ctl.num_stripes < ctl.min_stripes)
return -ENOSPC;