diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.h | 15 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 30 |
2 files changed, 36 insertions, 9 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 4370a56fe81a..3f8f11e18b53 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -758,6 +758,7 @@ struct btrfs_csum_item { #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) +#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE #define BTRFS_NR_RAID_TYPES 5 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ @@ -768,6 +769,15 @@ struct btrfs_csum_item { BTRFS_BLOCK_GROUP_RAID1 | \ BTRFS_BLOCK_GROUP_DUP | \ BTRFS_BLOCK_GROUP_RAID10) +/* + * We need a bit for restriper to be able to tell when chunks of type + * SINGLE are available. This "extended" profile format is used in + * fs_info->avail_*_alloc_bits (in-memory) and balance item fields + * (on-disk). The corresponding on-disk bit in chunk.type is reserved + * to avoid remappings between two formats in future. + */ +#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) + struct btrfs_block_group_item { __le64 used; __le64 chunk_objectid; @@ -1140,6 +1150,11 @@ struct btrfs_fs_info { spinlock_t ref_cache_lock; u64 total_ref_cache_size; + /* + * these three are in extended format (availability of single + * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other + * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) + */ u64 avail_data_alloc_bits; u64 avail_metadata_alloc_bits; u64 avail_system_alloc_bits; diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a8d8204188d1..15a22949da17 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3014,16 +3014,24 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) { u64 extra_flags = flags & BTRFS_BLOCK_GROUP_PROFILE_MASK; - if (extra_flags) { - if (flags & BTRFS_BLOCK_GROUP_DATA) - fs_info->avail_data_alloc_bits |= extra_flags; - if (flags & BTRFS_BLOCK_GROUP_METADATA) - fs_info->avail_metadata_alloc_bits |= extra_flags; - if (flags & BTRFS_BLOCK_GROUP_SYSTEM) - fs_info->avail_system_alloc_bits |= extra_flags; - } + + /* chunk -> extended profile */ + if (extra_flags == 0) + extra_flags = BTRFS_AVAIL_ALLOC_BIT_SINGLE; + + if (flags & BTRFS_BLOCK_GROUP_DATA) + fs_info->avail_data_alloc_bits |= extra_flags; + if (flags & BTRFS_BLOCK_GROUP_METADATA) + fs_info->avail_metadata_alloc_bits |= extra_flags; + if (flags & BTRFS_BLOCK_GROUP_SYSTEM) + fs_info->avail_system_alloc_bits |= extra_flags; } +/* + * @flags: available profiles in extended format (see ctree.h) + * + * Returns reduced profile in chunk format. + */ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags) { /* @@ -3053,8 +3061,12 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags) if ((flags & BTRFS_BLOCK_GROUP_RAID0) && ((flags & BTRFS_BLOCK_GROUP_RAID1) | (flags & BTRFS_BLOCK_GROUP_RAID10) | - (flags & BTRFS_BLOCK_GROUP_DUP))) + (flags & BTRFS_BLOCK_GROUP_DUP))) { flags &= ~BTRFS_BLOCK_GROUP_RAID0; + } + + /* extended -> chunk profile */ + flags &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; return flags; } |