diff options
Diffstat (limited to 'fs/btrfs/delayed-ref.h')
| -rw-r--r-- | fs/btrfs/delayed-ref.h | 122 |
1 files changed, 114 insertions, 8 deletions
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index 70606da440aa..c18f93ea88ed 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -176,6 +176,83 @@ struct btrfs_delayed_ref_root { u64 qgroup_to_skip; }; +enum btrfs_ref_type { + BTRFS_REF_NOT_SET, + BTRFS_REF_DATA, + BTRFS_REF_METADATA, + BTRFS_REF_LAST, +}; + +struct btrfs_data_ref { + /* For EXTENT_DATA_REF */ + + /* Root which refers to this data extent */ + u64 ref_root; + + /* Inode which refers to this data extent */ + u64 ino; + + /* + * file_offset - extent_offset + * + * file_offset is the key.offset of the EXTENT_DATA key. + * extent_offset is btrfs_file_extent_offset() of the EXTENT_DATA data. + */ + u64 offset; +}; + +struct btrfs_tree_ref { + /* + * Level of this tree block + * + * Shared for skinny (TREE_BLOCK_REF) and normal tree ref. + */ + int level; + + /* + * Root which refers to this tree block. + * + * For TREE_BLOCK_REF (skinny metadata, either inline or keyed) + */ + u64 root; + + /* For non-skinny metadata, no special member needed */ +}; + +struct btrfs_ref { + enum btrfs_ref_type type; + int action; + + /* + * Whether this extent should go through qgroup record. + * + * Normally false, but for certain cases like delayed subtree scan, + * setting this flag can hugely reduce qgroup overhead. + */ + bool skip_qgroup; + + /* + * Optional. For which root is this modification. + * Mostly used for qgroup optimization. + * + * When unset, data/tree ref init code will populate it. + * In certain cases, we're modifying reference for a different root. + * E.g. COW fs tree blocks for balance. + * In that case, tree_ref::root will be fs tree, but we're doing this + * for reloc tree, then we should set @real_root to reloc tree. + */ + u64 real_root; + u64 bytenr; + u64 len; + + /* Bytenr of the parent tree block */ + u64 parent; + union { + struct btrfs_data_ref data_ref; + struct btrfs_tree_ref tree_ref; + }; +}; + extern struct kmem_cache *btrfs_delayed_ref_head_cachep; extern struct kmem_cache *btrfs_delayed_tree_ref_cachep; extern struct kmem_cache *btrfs_delayed_data_ref_cachep; @@ -184,6 +261,38 @@ extern struct kmem_cache *btrfs_delayed_extent_op_cachep; int __init btrfs_delayed_ref_init(void); void __cold btrfs_delayed_ref_exit(void); +static inline void btrfs_init_generic_ref(struct btrfs_ref *generic_ref, + int action, u64 bytenr, u64 len, u64 parent) +{ + generic_ref->action = action; + generic_ref->bytenr = bytenr; + generic_ref->len = len; + generic_ref->parent = parent; +} + +static inline void btrfs_init_tree_ref(struct btrfs_ref *generic_ref, + int level, u64 root) +{ + /* If @real_root not set, use @root as fallback */ + if (!generic_ref->real_root) + generic_ref->real_root = root; + generic_ref->tree_ref.level = level; + generic_ref->tree_ref.root = root; + generic_ref->type = BTRFS_REF_METADATA; +} + +static inline void btrfs_init_data_ref(struct btrfs_ref *generic_ref, + u64 ref_root, u64 ino, u64 offset) +{ + /* If @real_root not set, use @root as fallback */ + if (!generic_ref->real_root) + generic_ref->real_root = ref_root; + generic_ref->data_ref.ref_root = ref_root; + generic_ref->data_ref.ino = ino; + generic_ref->data_ref.offset = offset; + generic_ref->type = BTRFS_REF_DATA; +} + static inline struct btrfs_delayed_extent_op * btrfs_alloc_delayed_extent_op(void) { @@ -224,17 +333,14 @@ static inline void btrfs_put_delayed_ref_head(struct btrfs_delayed_ref_head *hea } int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans, - u64 bytenr, u64 num_bytes, u64 parent, - u64 ref_root, int level, int action, + struct btrfs_ref *generic_ref, struct btrfs_delayed_extent_op *extent_op, int *old_ref_mod, int *new_ref_mod); int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans, - u64 bytenr, u64 num_bytes, - u64 parent, u64 ref_root, - u64 owner, u64 offset, u64 reserved, int action, - int *old_ref_mod, int *new_ref_mod); -int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info, - struct btrfs_trans_handle *trans, + struct btrfs_ref *generic_ref, + u64 reserved, int *old_ref_mod, + int *new_ref_mod); +int btrfs_add_delayed_extent_op(struct btrfs_trans_handle *trans, u64 bytenr, u64 num_bytes, struct btrfs_delayed_extent_op *extent_op); void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans, |