diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index aba7832a2285..f057e92df39f 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2735,22 +2735,27 @@ static inline void free_fs_info(struct btrfs_fs_info *fs_info) kfree(fs_info); } /** - * profile_is_valid - tests whether a given profile is valid and reduced + * 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 inline int profile_is_valid(u64 flags, int extended) +static inline int alloc_profile_is_valid(u64 flags, int extended) { - u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK; + u64 mask = (extended ? BTRFS_EXTENDED_PROFILE_MASK : + BTRFS_BLOCK_GROUP_PROFILE_MASK); flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK; - if (extended) - mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; - if (flags & mask) + /* 1) check that all other bits are zeroed */ + if (flags & ~mask) return 0; - /* true if zero or exactly one bit set */ - return (flags & (~flags + 1)) == flags; + + /* 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; } /* root-item.c */ |