313 lines
10 KiB
C
313 lines
10 KiB
C
/*
|
|
* nilfs.h - NILFS local header file.
|
|
*
|
|
* 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 Koji Sato <koji@osrg.net>
|
|
* Ryusuke Konishi <ryusuke@osrg.net>
|
|
*/
|
|
|
|
#ifndef _NILFS_H
|
|
#define _NILFS_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/nilfs2_fs.h>
|
|
#include "the_nilfs.h"
|
|
#include "sb.h"
|
|
#include "bmap.h"
|
|
|
|
/*
|
|
* nilfs inode data in memory
|
|
*/
|
|
struct nilfs_inode_info {
|
|
__u32 i_flags;
|
|
unsigned long i_state; /* Dynamic state flags */
|
|
struct nilfs_bmap *i_bmap;
|
|
struct nilfs_bmap i_bmap_data;
|
|
__u64 i_xattr; /* sector_t ??? */
|
|
__u32 i_dir_start_lookup;
|
|
__u64 i_cno; /* check point number for GC inode */
|
|
struct address_space i_btnode_cache;
|
|
struct list_head i_dirty; /* List for connecting dirty files */
|
|
|
|
#ifdef CONFIG_NILFS_XATTR
|
|
/*
|
|
* Extended attributes can be read independently of the main file
|
|
* data. Taking i_sem even when reading would cause contention
|
|
* between readers of EAs and writers of regular file data, so
|
|
* instead we synchronize on xattr_sem when reading or changing
|
|
* EAs.
|
|
*/
|
|
struct rw_semaphore xattr_sem;
|
|
#endif
|
|
struct buffer_head *i_bh; /* i_bh contains a new or dirty
|
|
disk inode */
|
|
struct nilfs_root *i_root;
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
static inline struct nilfs_inode_info *NILFS_I(const struct inode *inode)
|
|
{
|
|
return container_of(inode, struct nilfs_inode_info, vfs_inode);
|
|
}
|
|
|
|
static inline struct nilfs_inode_info *
|
|
NILFS_BMAP_I(const struct nilfs_bmap *bmap)
|
|
{
|
|
return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
|
|
}
|
|
|
|
static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
|
|
{
|
|
struct nilfs_inode_info *ii =
|
|
container_of(btnc, struct nilfs_inode_info, i_btnode_cache);
|
|
return &ii->vfs_inode;
|
|
}
|
|
|
|
static inline struct inode *NILFS_AS_I(struct address_space *mapping)
|
|
{
|
|
return (mapping->host) ? :
|
|
container_of(mapping, struct inode, i_data);
|
|
}
|
|
|
|
/*
|
|
* Dynamic state flags of NILFS on-memory inode (i_state)
|
|
*/
|
|
enum {
|
|
NILFS_I_NEW = 0, /* Inode is newly created */
|
|
NILFS_I_DIRTY, /* The file is dirty */
|
|
NILFS_I_QUEUED, /* inode is in dirty_files list */
|
|
NILFS_I_BUSY, /* inode is grabbed by a segment
|
|
constructor */
|
|
NILFS_I_COLLECTED, /* All dirty blocks are collected */
|
|
NILFS_I_UPDATED, /* The file has been written back */
|
|
NILFS_I_INODE_DIRTY, /* write_inode is requested */
|
|
NILFS_I_BMAP, /* has bmap and btnode_cache */
|
|
NILFS_I_GCINODE, /* inode for GC, on memory only */
|
|
};
|
|
|
|
/*
|
|
* commit flags for nilfs_commit_super and nilfs_sync_super
|
|
*/
|
|
enum {
|
|
NILFS_SB_COMMIT = 0, /* Commit a super block alternately */
|
|
NILFS_SB_COMMIT_ALL /* Commit both super blocks */
|
|
};
|
|
|
|
/*
|
|
* Macros to check inode numbers
|
|
*/
|
|
#define NILFS_MDT_INO_BITS \
|
|
((unsigned int)(1 << NILFS_DAT_INO | 1 << NILFS_CPFILE_INO | \
|
|
1 << NILFS_SUFILE_INO | 1 << NILFS_IFILE_INO | \
|
|
1 << NILFS_ATIME_INO | 1 << NILFS_SKETCH_INO))
|
|
|
|
#define NILFS_SYS_INO_BITS \
|
|
((unsigned int)(1 << NILFS_ROOT_INO) | NILFS_MDT_INO_BITS)
|
|
|
|
#define NILFS_FIRST_INO(sb) (NILFS_SB(sb)->s_nilfs->ns_first_ino)
|
|
|
|
#define NILFS_MDT_INODE(sb, ino) \
|
|
((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & (1 << (ino))))
|
|
#define NILFS_VALID_INODE(sb, ino) \
|
|
((ino) >= NILFS_FIRST_INO(sb) || (NILFS_SYS_INO_BITS & (1 << (ino))))
|
|
|
|
/**
|
|
* struct nilfs_transaction_info: context information for synchronization
|
|
* @ti_magic: Magic number
|
|
* @ti_save: Backup of journal_info field of task_struct
|
|
* @ti_flags: Flags
|
|
* @ti_count: Nest level
|
|
* @ti_garbage: List of inode to be put when releasing semaphore
|
|
*/
|
|
struct nilfs_transaction_info {
|
|
u32 ti_magic;
|
|
void *ti_save;
|
|
/* This should never used. If this happens,
|
|
one of other filesystems has a bug. */
|
|
unsigned short ti_flags;
|
|
unsigned short ti_count;
|
|
struct list_head ti_garbage;
|
|
};
|
|
|
|
/* ti_magic */
|
|
#define NILFS_TI_MAGIC 0xd9e392fb
|
|
|
|
/* ti_flags */
|
|
#define NILFS_TI_DYNAMIC_ALLOC 0x0001 /* Allocated from slab */
|
|
#define NILFS_TI_SYNC 0x0002 /* Force to construct segment at the
|
|
end of transaction. */
|
|
#define NILFS_TI_GC 0x0004 /* GC context */
|
|
#define NILFS_TI_COMMIT 0x0008 /* Change happened or not */
|
|
#define NILFS_TI_WRITER 0x0010 /* Constructor context */
|
|
|
|
|
|
int nilfs_transaction_begin(struct super_block *,
|
|
struct nilfs_transaction_info *, int);
|
|
int nilfs_transaction_commit(struct super_block *);
|
|
void nilfs_transaction_abort(struct super_block *);
|
|
|
|
static inline void nilfs_set_transaction_flag(unsigned int flag)
|
|
{
|
|
struct nilfs_transaction_info *ti = current->journal_info;
|
|
|
|
ti->ti_flags |= flag;
|
|
}
|
|
|
|
static inline int nilfs_test_transaction_flag(unsigned int flag)
|
|
{
|
|
struct nilfs_transaction_info *ti = current->journal_info;
|
|
|
|
if (ti == NULL || ti->ti_magic != NILFS_TI_MAGIC)
|
|
return 0;
|
|
return !!(ti->ti_flags & flag);
|
|
}
|
|
|
|
static inline int nilfs_doing_gc(void)
|
|
{
|
|
return nilfs_test_transaction_flag(NILFS_TI_GC);
|
|
}
|
|
|
|
static inline int nilfs_doing_construction(void)
|
|
{
|
|
return nilfs_test_transaction_flag(NILFS_TI_WRITER);
|
|
}
|
|
|
|
/*
|
|
* function prototype
|
|
*/
|
|
#ifdef CONFIG_NILFS_POSIX_ACL
|
|
#error "NILFS: not yet supported POSIX ACL"
|
|
extern int nilfs_acl_chmod(struct inode *);
|
|
extern int nilfs_init_acl(struct inode *, struct inode *);
|
|
#else
|
|
static inline int nilfs_acl_chmod(struct inode *inode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int nilfs_init_acl(struct inode *inode, struct inode *dir)
|
|
{
|
|
inode->i_mode &= ~current_umask();
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#define NILFS_ATIME_DISABLE
|
|
|
|
/* dir.c */
|
|
extern int nilfs_add_link(struct dentry *, struct inode *);
|
|
extern ino_t nilfs_inode_by_name(struct inode *, const struct qstr *);
|
|
extern int nilfs_make_empty(struct inode *, struct inode *);
|
|
extern struct nilfs_dir_entry *
|
|
nilfs_find_entry(struct inode *, const struct qstr *, struct page **);
|
|
extern int nilfs_delete_entry(struct nilfs_dir_entry *, struct page *);
|
|
extern int nilfs_empty_dir(struct inode *);
|
|
extern struct nilfs_dir_entry *nilfs_dotdot(struct inode *, struct page **);
|
|
extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
|
|
struct page *, struct inode *);
|
|
|
|
/* file.c */
|
|
extern int nilfs_sync_file(struct file *, int);
|
|
|
|
/* ioctl.c */
|
|
long nilfs_ioctl(struct file *, unsigned int, unsigned long);
|
|
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, struct nilfs_argv *,
|
|
void **);
|
|
|
|
/* inode.c */
|
|
extern struct inode *nilfs_new_inode(struct inode *, int);
|
|
extern void nilfs_free_inode(struct inode *);
|
|
extern int nilfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
|
|
extern void nilfs_set_inode_flags(struct inode *);
|
|
extern int nilfs_read_inode_common(struct inode *, struct nilfs_inode *);
|
|
extern void nilfs_write_inode_common(struct inode *, struct nilfs_inode *, int);
|
|
struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root,
|
|
unsigned long ino);
|
|
struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root,
|
|
unsigned long ino);
|
|
struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
|
|
unsigned long ino);
|
|
extern struct inode *nilfs_iget_for_gc(struct super_block *sb,
|
|
unsigned long ino, __u64 cno);
|
|
extern void nilfs_update_inode(struct inode *, struct buffer_head *);
|
|
extern void nilfs_truncate(struct inode *);
|
|
extern void nilfs_evict_inode(struct inode *);
|
|
extern int nilfs_setattr(struct dentry *, struct iattr *);
|
|
int nilfs_permission(struct inode *inode, int mask, unsigned int flags);
|
|
int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh);
|
|
extern int nilfs_inode_dirty(struct inode *);
|
|
int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty);
|
|
extern int nilfs_mark_inode_dirty(struct inode *);
|
|
extern void nilfs_dirty_inode(struct inode *);
|
|
int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
|
|
__u64 start, __u64 len);
|
|
|
|
/* super.c */
|
|
extern struct inode *nilfs_alloc_inode(struct super_block *);
|
|
extern void nilfs_destroy_inode(struct inode *);
|
|
extern void nilfs_error(struct super_block *, const char *, const char *, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern void nilfs_warning(struct super_block *, const char *, const char *, ...)
|
|
__attribute__ ((format (printf, 3, 4)));
|
|
extern struct nilfs_super_block *
|
|
nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
|
|
extern int nilfs_store_magic_and_option(struct super_block *,
|
|
struct nilfs_super_block *, char *);
|
|
extern int nilfs_check_feature_compatibility(struct super_block *,
|
|
struct nilfs_super_block *);
|
|
extern void nilfs_set_log_cursor(struct nilfs_super_block *,
|
|
struct the_nilfs *);
|
|
extern struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *,
|
|
int flip);
|
|
extern int nilfs_commit_super(struct nilfs_sb_info *, int);
|
|
extern int nilfs_cleanup_super(struct nilfs_sb_info *);
|
|
int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
|
|
struct nilfs_root **root);
|
|
int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno);
|
|
|
|
/* gcinode.c */
|
|
int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
|
|
struct buffer_head **);
|
|
int nilfs_gccache_submit_read_node(struct inode *, sector_t, __u64,
|
|
struct buffer_head **);
|
|
int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
|
|
int nilfs_init_gcinode(struct inode *inode);
|
|
void nilfs_remove_all_gcinodes(struct the_nilfs *nilfs);
|
|
|
|
/*
|
|
* Inodes and files operations
|
|
*/
|
|
extern const struct file_operations nilfs_dir_operations;
|
|
extern const struct inode_operations nilfs_file_inode_operations;
|
|
extern const struct file_operations nilfs_file_operations;
|
|
extern const struct address_space_operations nilfs_aops;
|
|
extern const struct inode_operations nilfs_dir_inode_operations;
|
|
extern const struct inode_operations nilfs_special_inode_operations;
|
|
extern const struct inode_operations nilfs_symlink_inode_operations;
|
|
|
|
/*
|
|
* filesystem type
|
|
*/
|
|
extern struct file_system_type nilfs_fs_type;
|
|
|
|
|
|
#endif /* _NILFS_H */
|