diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 74 |
1 files changed, 68 insertions, 6 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index eaf286abad17..46f52e1beade 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -99,6 +99,9 @@ struct btrfs_ordered_sum; */ #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL +/* For storing free space cache */ +#define BTRFS_FREE_SPACE_OBJECTID -11ULL + /* dummy objectid represents multiple objectids */ #define BTRFS_MULTIPLE_OBJECTIDS -255ULL @@ -265,6 +268,22 @@ struct btrfs_chunk { /* additional stripes go here */ } __attribute__ ((__packed__)); +#define BTRFS_FREE_SPACE_EXTENT 1 +#define BTRFS_FREE_SPACE_BITMAP 2 + +struct btrfs_free_space_entry { + __le64 offset; + __le64 bytes; + u8 type; +} __attribute__ ((__packed__)); + +struct btrfs_free_space_header { + struct btrfs_disk_key location; + __le64 generation; + __le64 num_entries; + __le64 num_bitmaps; +} __attribute__ ((__packed__)); + static inline unsigned long btrfs_chunk_item_size(int num_stripes) { BUG_ON(num_stripes == 0); @@ -365,8 +384,10 @@ struct btrfs_super_block { char label[BTRFS_LABEL_SIZE]; + __le64 cache_generation; + /* future expansion */ - __le64 reserved[32]; + __le64 reserved[31]; u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; } __attribute__ ((__packed__)); @@ -375,12 +396,12 @@ struct btrfs_super_block { * ones specified below then we will fail to mount */ #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) -#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0) +#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL -#define BTRFS_FEATURE_INCOMPAT_SUPP \ - (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ +#define BTRFS_FEATURE_INCOMPAT_SUPP \ + (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL) /* @@ -750,6 +771,14 @@ enum btrfs_caching_type { BTRFS_CACHE_FINISHED = 2, }; +enum btrfs_disk_cache_state { + BTRFS_DC_WRITTEN = 0, + BTRFS_DC_ERROR = 1, + BTRFS_DC_CLEAR = 2, + BTRFS_DC_SETUP = 3, + BTRFS_DC_NEED_WRITE = 4, +}; + struct btrfs_caching_control { struct list_head list; struct mutex mutex; @@ -763,6 +792,7 @@ struct btrfs_block_group_cache { struct btrfs_key key; struct btrfs_block_group_item item; struct btrfs_fs_info *fs_info; + struct inode *inode; spinlock_t lock; u64 pinned; u64 reserved; @@ -773,8 +803,11 @@ struct btrfs_block_group_cache { int extents_thresh; int free_extents; int total_bitmaps; - int ro; - int dirty; + int ro:1; + int dirty:1; + int iref:1; + + int disk_cache_state; /* cache tracking stuff */ int cached; @@ -1192,6 +1225,7 @@ struct btrfs_root { #define BTRFS_MOUNT_NOSSD (1 << 9) #define BTRFS_MOUNT_DISCARD (1 << 10) #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) +#define BTRFS_MOUNT_SPACE_CACHE (1 << 12) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) @@ -1665,6 +1699,27 @@ static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, write_eb_member(eb, item, struct btrfs_dir_item, location, key); } +BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, + num_entries, 64); +BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, + num_bitmaps, 64); +BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, + generation, 64); + +static inline void btrfs_free_space_key(struct extent_buffer *eb, + struct btrfs_free_space_header *h, + struct btrfs_disk_key *key) +{ + read_eb_member(eb, h, struct btrfs_free_space_header, location, key); +} + +static inline void btrfs_set_free_space_key(struct extent_buffer *eb, + struct btrfs_free_space_header *h, + struct btrfs_disk_key *key) +{ + write_eb_member(eb, h, struct btrfs_free_space_header, location, key); +} + /* struct btrfs_disk_key */ BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, objectid, 64); @@ -1876,6 +1931,8 @@ BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, incompat_flags, 64); BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, csum_type, 16); +BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, + cache_generation, 64); static inline int btrfs_super_csum_size(struct btrfs_super_block *s) { @@ -2115,6 +2172,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root, struct btrfs_block_group_cache *cache); int btrfs_set_block_group_rw(struct btrfs_root *root, struct btrfs_block_group_cache *cache); +void btrfs_put_block_group_cache(struct btrfs_fs_info *info); /* ctree.c */ int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, int level, int *slot); @@ -2426,6 +2484,10 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root); int btrfs_prealloc_file_range(struct inode *inode, int mode, u64 start, u64 num_bytes, u64 min_size, loff_t actual_len, u64 *alloc_hint); +int btrfs_prealloc_file_range_trans(struct inode *inode, + struct btrfs_trans_handle *trans, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint); extern const struct dentry_operations btrfs_dentry_operations; /* ioctl.c */ |