diff options
Diffstat (limited to 'fs/nilfs2/mdt.h')
| -rw-r--r-- | fs/nilfs2/mdt.h | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h index 6c4bbb0470f..ab172e8549c 100644 --- a/fs/nilfs2/mdt.h +++ b/fs/nilfs2/mdt.h @@ -29,25 +29,39 @@ #include "page.h" /** + * struct nilfs_shadow_map - shadow mapping of meta data file + * @bmap_store: shadow copy of bmap state + * @frozen_data: shadowed dirty data pages + * @frozen_btnodes: shadowed dirty b-tree nodes' pages + * @frozen_buffers: list of frozen buffers + */ +struct nilfs_shadow_map { + struct nilfs_bmap_store bmap_store; + struct address_space frozen_data; + struct address_space frozen_btnodes; + struct list_head frozen_buffers; +}; + +/** * struct nilfs_mdt_info - on-memory private data of meta data files - * @mi_nilfs: back pointer to the_nilfs struct * @mi_sem: reader/writer semaphore for meta data operations * @mi_bgl: per-blockgroup locking * @mi_entry_size: size of an entry * @mi_first_entry_offset: offset to the first entry * @mi_entries_per_block: number of entries in a block * @mi_palloc_cache: persistent object allocator cache + * @mi_shadow: shadow of bmap and page caches * @mi_blocks_per_group: number of blocks in a group * @mi_blocks_per_desc_block: number of blocks per descriptor block */ struct nilfs_mdt_info { - struct the_nilfs *mi_nilfs; struct rw_semaphore mi_sem; struct blockgroup_lock *mi_bgl; unsigned mi_entry_size; unsigned mi_first_entry_offset; unsigned long mi_entries_per_block; struct nilfs_palloc_cache *mi_palloc_cache; + struct nilfs_shadow_map *mi_shadow; unsigned long mi_blocks_per_group; unsigned long mi_blocks_per_desc_block; }; @@ -57,13 +71,6 @@ static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode) return inode->i_private; } -static inline struct the_nilfs *NILFS_I_NILFS(struct inode *inode) -{ - struct super_block *sb = inode->i_sb; - - return sb ? NILFS_SB(sb)->s_nilfs : NILFS_MDT(inode)->mi_nilfs; -} - /* Default GFP flags using highmem */ #define NILFS_MDT_GFP (__GFP_WAIT | __GFP_IO | __GFP_HIGHMEM) @@ -76,16 +83,17 @@ int nilfs_mdt_forget_block(struct inode *, unsigned long); int nilfs_mdt_mark_block_dirty(struct inode *, unsigned long); int nilfs_mdt_fetch_dirty(struct inode *); -struct inode *nilfs_mdt_new(struct the_nilfs *, struct super_block *, ino_t, - size_t); -struct inode *nilfs_mdt_new_common(struct the_nilfs *, struct super_block *, - ino_t, gfp_t, size_t); -void nilfs_mdt_destroy(struct inode *); +int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz); void nilfs_mdt_set_entry_size(struct inode *, unsigned, unsigned); -void nilfs_mdt_set_shadow(struct inode *, struct inode *); - -#define nilfs_mdt_mark_buffer_dirty(bh) nilfs_mark_buffer_dirty(bh) +int nilfs_mdt_setup_shadow_map(struct inode *inode, + struct nilfs_shadow_map *shadow); +int nilfs_mdt_save_to_shadow_map(struct inode *inode); +void nilfs_mdt_restore_from_shadow_map(struct inode *inode); +void nilfs_mdt_clear_shadow_map(struct inode *inode); +int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh); +struct buffer_head *nilfs_mdt_get_frozen_buffer(struct inode *inode, + struct buffer_head *bh); static inline void nilfs_mdt_mark_dirty(struct inode *inode) { @@ -100,7 +108,7 @@ static inline void nilfs_mdt_clear_dirty(struct inode *inode) static inline __u64 nilfs_mdt_cno(struct inode *inode) { - return NILFS_MDT(inode)->mi_nilfs->ns_cno; + return ((struct the_nilfs *)inode->i_sb->s_fs_info)->ns_cno; } #define nilfs_mdt_bgl_lock(inode, bg) \ |