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btrfs: balance: factor out convert profile validation 

The validation follows the same steps for all three block group types,
the existing helper validate_convert_profile can be enhanced and do more
of the common things.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-02-27 21:00:52 +01:00
parent c67b38925b
commit 5ba366c399
1 changed files with 21 additions and 24 deletions
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45
fs/btrfs/volumes.c
View File

@ -3801,13 +3801,25 @@ static inline int balance_need_close(struct btrfs_fs_info *fs_info)
atomic_read(&fs_info->balance_cancel_req) == 0);
}
/* Non-zero return value signifies invalidity */
static inline int validate_convert_profile(struct btrfs_balance_args *bctl_arg,
u64 allowed)
/*
* Validate target profile against allowed profiles and return true if it's OK.
* Otherwise print the error message and return false.
*/
static inline int validate_convert_profile(struct btrfs_fs_info *fs_info,
const struct btrfs_balance_args *bargs,
u64 allowed, const char *type)
{
return ((bctl_arg->flags & BTRFS_BALANCE_ARGS_CONVERT) &&
(!alloc_profile_is_valid(bctl_arg->target, 1) ||
(bctl_arg->target & ~allowed)));
if (!(bargs->flags & BTRFS_BALANCE_ARGS_CONVERT))
return true;
/* Profile is valid and does not have bits outside of the allowed set */
if (alloc_profile_is_valid(bargs->target, 1) &&
(bargs->target & ~allowed) == 0)
return true;
btrfs_err(fs_info, "balance: invalid convert %s profile %s",
type, btrfs_bg_type_to_raid_name(bargs->target));
return false;
}
/*
@ -4023,24 +4035,9 @@ int btrfs_balance(struct btrfs_fs_info *fs_info,
if (num_devices >= btrfs_raid_array[i].devs_min)
allowed |= btrfs_raid_array[i].bg_flag;
if (validate_convert_profile(&bctl->data, allowed)) {
btrfs_err(fs_info,
"balance: invalid convert data profile %s",
btrfs_bg_type_to_raid_name(bctl->data.target));
ret = -EINVAL;
goto out;
}
if (validate_convert_profile(&bctl->meta, allowed)) {
btrfs_err(fs_info,
"balance: invalid convert metadata profile %s",
btrfs_bg_type_to_raid_name(bctl->meta.target));
ret = -EINVAL;
goto out;
}
if (validate_convert_profile(&bctl->sys, allowed)) {
btrfs_err(fs_info,
"balance: invalid convert system profile %s",
btrfs_bg_type_to_raid_name(bctl->sys.target));
if (!validate_convert_profile(fs_info, &bctl->data, allowed, "data") ||
!validate_convert_profile(fs_info, &bctl->meta, allowed, "metadata") ||
!validate_convert_profile(fs_info, &bctl->sys, allowed, "system")) {
ret = -EINVAL;
goto out;
}