btrfs: cleanup btrfs_balance profile validity checks

Improve readability by generalizing the profile validity checks.

Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 7b53390..59538a7 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3542,6 +3542,15 @@ static void __cancel_balance(struct btrfs_fs_info *fs_info)
        atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
 }
 
+/* Non-zero return value signifies invalidity */
+static inline int validate_convert_profile(struct btrfs_balance_args *bctl_arg,
+               u64 allowed)
+{
+       return ((bctl_arg->flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+               (!alloc_profile_is_valid(bctl_arg->target, 1) ||
+                (bctl_arg->target & ~allowed)));
+}
+
 /*
  * Should be called with both balance and volume mutexes held
  */
@@ -3599,27 +3608,21 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
        if (num_devices > 3)
                allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
                            BTRFS_BLOCK_GROUP_RAID6);
-       if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
-           (!alloc_profile_is_valid(bctl->data.target, 1) ||
-            (bctl->data.target & ~allowed))) {
+       if (validate_convert_profile(&bctl->data, allowed)) {
                btrfs_err(fs_info, "unable to start balance with target "
                           "data profile %llu",
                       bctl->data.target);
                ret = -EINVAL;
                goto out;
        }
-       if ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
-           (!alloc_profile_is_valid(bctl->meta.target, 1) ||
-            (bctl->meta.target & ~allowed))) {
+       if (validate_convert_profile(&bctl->meta, allowed)) {
                btrfs_err(fs_info,
                           "unable to start balance with target metadata profile %llu",
                       bctl->meta.target);
                ret = -EINVAL;
                goto out;
        }
-       if ((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
-           (!alloc_profile_is_valid(bctl->sys.target, 1) ||
-            (bctl->sys.target & ~allowed))) {
+       if (validate_convert_profile(&bctl->sys, allowed)) {
                btrfs_err(fs_info,
                           "unable to start balance with target system profile %llu",
                       bctl->sys.target);