From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- fs/nilfs2/mdt.h | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 fs/nilfs2/mdt.h (limited to 'fs/nilfs2/mdt.h') diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h new file mode 100644 index 00000000..ab20a4ba --- /dev/null +++ b/fs/nilfs2/mdt.h @@ -0,0 +1,110 @@ +/* + * mdt.h - 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 + */ + +#ifndef _NILFS_MDT_H +#define _NILFS_MDT_H + +#include +#include +#include "nilfs.h" +#include "page.h" + +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_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 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; +}; + +static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode) +{ + return inode->i_private; +} + +/* Default GFP flags using highmem */ +#define NILFS_MDT_GFP (__GFP_WAIT | __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_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); + +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) +{ + if (!test_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state)) + set_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state); +} + +static inline void nilfs_mdt_clear_dirty(struct inode *inode) +{ + clear_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state); +} + +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) + +#endif /* _NILFS_MDT_H */ -- cgit