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Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e4ef0f2..def9e25 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2598,6 +2598,30 @@ error:
return ret;
}
+/**
+ * alloc_profile_is_valid - see if a given profile is valid and reduced
+ * @flags: profile to validate
+ * @extended: if true @flags is treated as an extended profile
+ */
+static int alloc_profile_is_valid(u64 flags, int extended)
+{
+ u64 mask = (extended ? BTRFS_EXTENDED_PROFILE_MASK :
+ BTRFS_BLOCK_GROUP_PROFILE_MASK);
+
+ flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
+
+ /* 1) check that all other bits are zeroed */
+ if (flags & ~mask)
+ return 0;
+
+ /* 2) see if profile is reduced */
+ if (flags == 0)
+ return !extended; /* "0" is valid for usual profiles */
+
+ /* true if exactly one bit set */
+ return (flags & (flags - 1)) == 0;
+}
+
static inline int balance_need_close(struct btrfs_fs_info *fs_info)
{
/* cancel requested || normal exit path */
@@ -3124,11 +3148,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
int i;
int j;
- if ((type & BTRFS_BLOCK_GROUP_RAID1) &&
- (type & BTRFS_BLOCK_GROUP_DUP)) {
- WARN_ON(1);
- type &= ~BTRFS_BLOCK_GROUP_DUP;
- }
+ BUG_ON(!alloc_profile_is_valid(type, 0));
if (list_empty(&fs_devices->alloc_list))
return -ENOSPC;