diff options
Diffstat (limited to 'fs/nilfs2/mdt.h')
| -rw-r--r-- | fs/nilfs2/mdt.h | 52 |
1 files changed, 25 insertions, 27 deletions
diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h index ab172e8549c5..9e23bab3ff12 100644 --- a/fs/nilfs2/mdt.h +++ b/fs/nilfs2/mdt.h @@ -1,23 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* - * mdt.h - NILFS meta data file prototype and definitions + * NILFS meta data file prototype and definitions * * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - * Written by Ryusuke Konishi <ryusuke@osrg.net> + * Written by Ryusuke Konishi. */ #ifndef _NILFS_MDT_H @@ -31,14 +18,12 @@ /** * 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 + * @inode: holder of page caches used in shadow mapping * @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 inode *inode; struct list_head frozen_buffers; }; @@ -57,8 +42,8 @@ struct nilfs_shadow_map { struct nilfs_mdt_info { struct rw_semaphore mi_sem; struct blockgroup_lock *mi_bgl; - unsigned mi_entry_size; - unsigned mi_first_entry_offset; + unsigned int mi_entry_size; + unsigned int mi_first_entry_offset; unsigned long mi_entries_per_block; struct nilfs_palloc_cache *mi_palloc_cache; struct nilfs_shadow_map *mi_shadow; @@ -71,20 +56,30 @@ static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode) return inode->i_private; } +static inline int nilfs_is_metadata_file_inode(const struct inode *inode) +{ + return inode->i_private != NULL; +} + /* Default GFP flags using highmem */ -#define NILFS_MDT_GFP (__GFP_WAIT | __GFP_IO | __GFP_HIGHMEM) +#define NILFS_MDT_GFP (__GFP_RECLAIM | __GFP_IO | __GFP_HIGHMEM) int nilfs_mdt_get_block(struct inode *, unsigned long, int, void (*init_block)(struct inode *, struct buffer_head *, void *), struct buffer_head **); +int nilfs_mdt_find_block(struct inode *inode, unsigned long start, + unsigned long end, unsigned long *blkoff, + struct buffer_head **out_bh); int nilfs_mdt_delete_block(struct inode *, unsigned long); 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 *); 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_clear(struct inode *inode); +void nilfs_mdt_destroy(struct inode *inode); + +void nilfs_mdt_set_entry_size(struct inode *, unsigned int, unsigned int); int nilfs_mdt_setup_shadow_map(struct inode *inode, struct nilfs_shadow_map *shadow); @@ -111,7 +106,10 @@ static inline __u64 nilfs_mdt_cno(struct inode *inode) return ((struct the_nilfs *)inode->i_sb->s_fs_info)->ns_cno; } -#define nilfs_mdt_bgl_lock(inode, bg) \ - (&NILFS_MDT(inode)->mi_bgl->locks[(bg) & (NR_BG_LOCKS-1)].lock) +static inline spinlock_t * +nilfs_mdt_bgl_lock(struct inode *inode, unsigned int block_group) +{ + return bgl_lock_ptr(NILFS_MDT(inode)->mi_bgl, block_group); +} #endif /* _NILFS_MDT_H */ |