mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
2879ed66e4
This finally removes own inode allocator and destructor functions for metadata files. Several routines, nilfs_mdt_new(), nilfs_mdt_new_common(), nilfs_mdt_clear(), nilfs_mdt_destroy(), and nilfs_alloc_inode_common() will be gone. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/*
|
|
* 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 <ryusuke@osrg.net>
|
|
*/
|
|
|
|
#ifndef _NILFS_MDT_H
|
|
#define _NILFS_MDT_H
|
|
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/blockgroup_lock.h>
|
|
#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;
|
|
}
|
|
|
|
static inline struct the_nilfs *NILFS_I_NILFS(struct inode *inode)
|
|
{
|
|
return NILFS_SB(inode->i_sb)->s_nilfs;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
#define nilfs_mdt_mark_buffer_dirty(bh) nilfs_mark_buffer_dirty(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 NILFS_I_NILFS(inode)->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 */
|