diff options
Diffstat (limited to 'fs/nilfs2/bmap.h')
| -rw-r--r-- | fs/nilfs2/bmap.h | 110 |
1 files changed, 78 insertions, 32 deletions
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h index 28c77bb71bb7..47f5b74713c0 100644 --- a/fs/nilfs2/bmap.h +++ b/fs/nilfs2/bmap.h @@ -86,27 +86,6 @@ struct nilfs_bmap_operations { }; -/** - * struct nilfs_bmap_ptr_operations - bmap ptr operation table - */ -struct nilfs_bmap_ptr_operations { - int (*bpop_prepare_alloc_ptr)(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *); - void (*bpop_commit_alloc_ptr)(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *); - void (*bpop_abort_alloc_ptr)(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *); - int (*bpop_prepare_end_ptr)(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *); - void (*bpop_commit_end_ptr)(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *); - void (*bpop_abort_end_ptr)(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *); - - int (*bpop_translate)(const struct nilfs_bmap *, __u64, __u64 *); -}; - - #define NILFS_BMAP_SIZE (NILFS_INODE_BMAP_SIZE * sizeof(__le64)) #define NILFS_BMAP_KEY_BIT (sizeof(unsigned long) * 8 /* CHAR_BIT */) #define NILFS_BMAP_NEW_PTR_INIT \ @@ -124,9 +103,9 @@ static inline int nilfs_bmap_is_new_ptr(unsigned long ptr) * @b_sem: semaphore * @b_inode: owner of bmap * @b_ops: bmap operation table - * @b_pops: bmap ptr operation table * @b_last_allocated_key: last allocated key for data block * @b_last_allocated_ptr: last allocated ptr for data block + * @b_ptr_type: pointer type * @b_state: state */ struct nilfs_bmap { @@ -137,12 +116,22 @@ struct nilfs_bmap { struct rw_semaphore b_sem; struct inode *b_inode; const struct nilfs_bmap_operations *b_ops; - const struct nilfs_bmap_ptr_operations *b_pops; __u64 b_last_allocated_key; __u64 b_last_allocated_ptr; + int b_ptr_type; int b_state; }; +/* pointer type */ +#define NILFS_BMAP_PTR_P 0 /* physical block number (i.e. LBN) */ +#define NILFS_BMAP_PTR_VS 1 /* virtual block number (single + version) */ +#define NILFS_BMAP_PTR_VM 2 /* virtual block number (has multiple + versions) */ +#define NILFS_BMAP_PTR_U (-1) /* never perform pointer operations */ + +#define NILFS_BMAP_USE_VBN(bmap) ((bmap)->b_ptr_type > 0) + /* state */ #define NILFS_BMAP_DIRTY 0x00000001 @@ -171,6 +160,63 @@ void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *); /* * Internal use only */ +int nilfs_bmap_prepare_alloc_v(struct nilfs_bmap *, + union nilfs_bmap_ptr_req *); +void nilfs_bmap_commit_alloc_v(struct nilfs_bmap *, + union nilfs_bmap_ptr_req *); +void nilfs_bmap_abort_alloc_v(struct nilfs_bmap *, + union nilfs_bmap_ptr_req *); + +static inline int nilfs_bmap_prepare_alloc_ptr(struct nilfs_bmap *bmap, + union nilfs_bmap_ptr_req *req) +{ + if (NILFS_BMAP_USE_VBN(bmap)) + return nilfs_bmap_prepare_alloc_v(bmap, req); + /* ignore target ptr */ + req->bpr_ptr = bmap->b_last_allocated_ptr++; + return 0; +} + +static inline void nilfs_bmap_commit_alloc_ptr(struct nilfs_bmap *bmap, + union nilfs_bmap_ptr_req *req) +{ + if (NILFS_BMAP_USE_VBN(bmap)) + nilfs_bmap_commit_alloc_v(bmap, req); +} + +static inline void nilfs_bmap_abort_alloc_ptr(struct nilfs_bmap *bmap, + union nilfs_bmap_ptr_req *req) +{ + if (NILFS_BMAP_USE_VBN(bmap)) + nilfs_bmap_abort_alloc_v(bmap, req); + else + bmap->b_last_allocated_ptr--; +} + +int nilfs_bmap_prepare_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *); +void nilfs_bmap_commit_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *); +void nilfs_bmap_abort_end_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *); + +static inline int nilfs_bmap_prepare_end_ptr(struct nilfs_bmap *bmap, + union nilfs_bmap_ptr_req *req) +{ + return NILFS_BMAP_USE_VBN(bmap) ? + nilfs_bmap_prepare_end_v(bmap, req) : 0; +} + +static inline void nilfs_bmap_commit_end_ptr(struct nilfs_bmap *bmap, + union nilfs_bmap_ptr_req *req) +{ + if (NILFS_BMAP_USE_VBN(bmap)) + nilfs_bmap_commit_end_v(bmap, req); +} + +static inline void nilfs_bmap_abort_end_ptr(struct nilfs_bmap *bmap, + union nilfs_bmap_ptr_req *req) +{ + if (NILFS_BMAP_USE_VBN(bmap)) + nilfs_bmap_abort_end_v(bmap, req); +} int nilfs_bmap_start_v(struct nilfs_bmap *, union nilfs_bmap_ptr_req *, sector_t); @@ -184,15 +230,15 @@ __u64 nilfs_bmap_data_get_key(const struct nilfs_bmap *, __u64 nilfs_bmap_find_target_seq(const struct nilfs_bmap *, __u64); __u64 nilfs_bmap_find_target_in_group(const struct nilfs_bmap *); -int nilfs_bmap_prepare_update(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *, - union nilfs_bmap_ptr_req *); -void nilfs_bmap_commit_update(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *, - union nilfs_bmap_ptr_req *); -void nilfs_bmap_abort_update(struct nilfs_bmap *, - union nilfs_bmap_ptr_req *, - union nilfs_bmap_ptr_req *); +int nilfs_bmap_prepare_update_v(struct nilfs_bmap *, + union nilfs_bmap_ptr_req *, + union nilfs_bmap_ptr_req *); +void nilfs_bmap_commit_update_v(struct nilfs_bmap *, + union nilfs_bmap_ptr_req *, + union nilfs_bmap_ptr_req *); +void nilfs_bmap_abort_update_v(struct nilfs_bmap *, + union nilfs_bmap_ptr_req *, + union nilfs_bmap_ptr_req *); void nilfs_bmap_add_blocks(const struct nilfs_bmap *, int); void nilfs_bmap_sub_blocks(const struct nilfs_bmap *, int); |