cregit-Linux how code gets into the kernel

Release 4.18 fs/nilfs2/mdt.h

Directory: fs/nilfs2
/*
 * 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.
 *
 * Written by Ryusuke Konishi.
 */

#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 - 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_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 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;
	
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; }

Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi20100.00%1100.00%
Total20100.00%1100.00%


static inline int nilfs_is_metadata_file_inode(const struct inode *inode) { return inode->i_private != NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi20100.00%1100.00%
Total20100.00%1100.00%

/* Default GFP flags using 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_fetch_dirty(struct inode *); int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz); 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); 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); }

Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi41100.00%1100.00%
Total41100.00%1100.00%


static inline void nilfs_mdt_clear_dirty(struct inode *inode) { clear_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state); }

Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi25100.00%1100.00%
Total25100.00%1100.00%


static inline __u64 nilfs_mdt_cno(struct inode *inode) { return ((struct the_nilfs *)inode->i_sb->s_fs_info)->ns_cno; }

Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi28100.00%2100.00%
Total28100.00%2100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi30100.00%2100.00%
Total30100.00%2100.00%

#endif /* _NILFS_MDT_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Ryusuke Konishi46899.57%1285.71%
Vyacheslav Dubeyko10.21%17.14%
Mel Gorman10.21%17.14%
Total470100.00%14100.00%
Directory: fs/nilfs2
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.