[deliverable/linux.git] / fs / nilfs2 / nilfs.h

/*
 * 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.
 *
 * Written by Koji Sato and Ryusuke Konishi.
 */

#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 "bmap.h"

/**
 * struct nilfs_inode_info - nilfs inode data in memory
 * @i_flags: inode flags
 * @i_state: dynamic state flags
 * @i_bmap: pointer on i_bmap_data
 * @i_bmap_data: raw block mapping
 * @i_xattr: <TODO>
 * @i_dir_start_lookup: page index of last successful search
 * @i_cno: checkpoint number for GC inode
 * @i_btnode_cache: cached pages of b-tree nodes
 * @i_dirty: list for connecting dirty files
 * @xattr_sem: semaphore for extended attributes processing
 * @i_bh: buffer contains disk inode
 * @i_root: root object of the current filesystem tree
 * @vfs_inode: VFS inode object
 */
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;
}

/*
 * 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_SYNC,		/* dsync is not allowed for inode */
	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) (((struct the_nilfs *)sb->s_fs_info)->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
 */
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;
};

/* 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

/* Flags that should be inherited by new inodes from their parent. */
#define NILFS_FL_INHERITED						\
	(FS_SECRM_FL | FS_UNRM_FL | FS_COMPR_FL | FS_SYNC_FL |		\
	 FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NODUMP_FL | FS_NOATIME_FL |\
	 FS_COMPRBLK_FL | FS_NOCOMP_FL | FS_NOTAIL_FL | FS_DIRSYNC_FL)

/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 nilfs_mask_flags(umode_t mode, __u32 flags)
{
	if (S_ISDIR(mode))
		return flags;
	else if (S_ISREG(mode))
		return flags & ~(FS_DIRSYNC_FL | FS_TOPDIR_FL);
	else
		return flags & (FS_NODUMP_FL | FS_NOATIME_FL);
}

/* 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 *, loff_t, loff_t, int);

/* ioctl.c */
long nilfs_ioctl(struct file *, unsigned int, unsigned long);
long nilfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, struct nilfs_argv *,
				       void **);

/* inode.c */
void nilfs_inode_add_blocks(struct inode *inode, int n);
void nilfs_inode_sub_blocks(struct inode *inode, int n);
extern struct inode *nilfs_new_inode(struct inode *, umode_t);
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 *, int);
extern void nilfs_truncate(struct inode *);
extern void nilfs_evict_inode(struct inode *);
extern int nilfs_setattr(struct dentry *, struct iattr *);
extern void nilfs_write_failed(struct address_space *mapping, loff_t to);
int nilfs_permission(struct inode *inode, int mask);
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 *, int);
extern void nilfs_dirty_inode(struct inode *, int flags);
int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
		 __u64 start, __u64 len);
static inline int nilfs_mark_inode_dirty(struct inode *inode)
{
	return __nilfs_mark_inode_dirty(inode, I_DIRTY);
}
static inline int nilfs_mark_inode_dirty_sync(struct inode *inode)
{
	return __nilfs_mark_inode_dirty(inode, I_DIRTY_SYNC);
}

/* super.c */
extern struct inode *nilfs_alloc_inode(struct super_block *);
extern void nilfs_destroy_inode(struct inode *);
extern __printf(3, 4)
void nilfs_error(struct super_block *, const char *, const char *, ...);
extern __printf(3, 4)
void nilfs_warning(struct super_block *, const char *, const char *, ...);
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 *);
struct nilfs_super_block **nilfs_prepare_super(struct super_block *sb,
					       int flip);
int nilfs_commit_super(struct super_block *sb, int flag);
int nilfs_cleanup_super(struct super_block *sb);
int nilfs_resize_fs(struct super_block *sb, __u64 newsize);
int nilfs_attach_checkpoint(struct super_block *sb, __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);

/* sysfs.c */
int __init nilfs_sysfs_init(void);
void nilfs_sysfs_exit(void);
int nilfs_sysfs_create_device_group(struct super_block *);
void nilfs_sysfs_delete_device_group(struct the_nilfs *);
int nilfs_sysfs_create_snapshot_group(struct nilfs_root *);
void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *);

/*
 * 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 */
Commit	Line	Data
65b4643d RK	1	/*
	2	* nilfs.h - NILFS local header file.
	3	*
	4	* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
4b420ab4	16	* Written by Koji Sato and Ryusuke Konishi.
65b4643d RK	17	*/
	18
	19	#ifndef _NILFS_H
	20	#define _NILFS_H
	21
	22	#include <linux/kernel.h>
	23	#include <linux/buffer_head.h>
	24	#include <linux/spinlock.h>
	25	#include <linux/blkdev.h>
	26	#include <linux/nilfs2_fs.h>
	27	#include "the_nilfs.h"
65b4643d	28	#include "bmap.h"
65b4643d	29
f5974c8f VD	30	/**
	31	* struct nilfs_inode_info - nilfs inode data in memory
	32	* @i_flags: inode flags
	33	* @i_state: dynamic state flags
	34	* @i_bmap: pointer on i_bmap_data
	35	* @i_bmap_data: raw block mapping
	36	* @i_xattr: <TODO>
	37	* @i_dir_start_lookup: page index of last successful search
	38	* @i_cno: checkpoint number for GC inode
	39	* @i_btnode_cache: cached pages of b-tree nodes
	40	* @i_dirty: list for connecting dirty files
	41	* @xattr_sem: semaphore for extended attributes processing
	42	* @i_bh: buffer contains disk inode
	43	* @i_root: root object of the current filesystem tree
	44	* @vfs_inode: VFS inode object
65b4643d RK	45	*/
	46	struct nilfs_inode_info {
	47	__u32 i_flags;
	48	unsigned long i_state; /* Dynamic state flags */
	49	struct nilfs_bmap *i_bmap;
05d0e94b	50	struct nilfs_bmap i_bmap_data;
65b4643d	51	__u64 i_xattr; /* sector_t ??? */
65b4643d RK	52	__u32 i_dir_start_lookup;
	53	__u64 i_cno; /* check point number for GC inode */
	54	struct address_space i_btnode_cache;
	55	struct list_head i_dirty; /* List for connecting dirty files */
	56
	57	#ifdef CONFIG_NILFS_XATTR
	58	/*
	59	* Extended attributes can be read independently of the main file
	60	* data. Taking i_sem even when reading would cause contention
	61	* between readers of EAs and writers of regular file data, so
	62	* instead we synchronize on xattr_sem when reading or changing
	63	* EAs.
	64	*/
	65	struct rw_semaphore xattr_sem;
65b4643d RK	66	#endif
	67	struct buffer_head i_bh; / i_bh contains a new or dirty
	68	disk inode */
4d8d9293	69	struct nilfs_root *i_root;
65b4643d RK	70	struct inode vfs_inode;
	71	};
	72
	73	static inline struct nilfs_inode_info NILFS_I(const struct inode inode)
	74	{
	75	return container_of(inode, struct nilfs_inode_info, vfs_inode);
	76	}
	77
	78	static inline struct nilfs_inode_info *
	79	NILFS_BMAP_I(const struct nilfs_bmap *bmap)
	80	{
05d0e94b	81	return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
65b4643d RK	82	}
	83
	84	static inline struct inode NILFS_BTNC_I(struct address_space btnc)
	85	{
	86	struct nilfs_inode_info *ii =
	87	container_of(btnc, struct nilfs_inode_info, i_btnode_cache);
	88	return &ii->vfs_inode;
	89	}
	90
65b4643d RK	91	/*
	92	* Dynamic state flags of NILFS on-memory inode (i_state)
	93	*/
	94	enum {
	95	NILFS_I_NEW = 0, /* Inode is newly created */
	96	NILFS_I_DIRTY, /* The file is dirty */
	97	NILFS_I_QUEUED, /* inode is in dirty_files list */
	98	NILFS_I_BUSY, /* inode is grabbed by a segment
	99	constructor */
	100	NILFS_I_COLLECTED, /* All dirty blocks are collected */
	101	NILFS_I_UPDATED, /* The file has been written back */
b9f66140	102	NILFS_I_INODE_SYNC, /* dsync is not allowed for inode */
65b4643d RK	103	NILFS_I_BMAP, /* has bmap and btnode_cache */
65b4643d RK	104	NILFS_I_GCINODE, /* inode for GC, on memory only */
65b4643d RK	105	};
65b4643d RK	106
b2ac86e1 JS	107	/*
	108	* commit flags for nilfs_commit_super and nilfs_sync_super
	109	*/
	110	enum {
	111	NILFS_SB_COMMIT = 0, /* Commit a super block alternately */
	112	NILFS_SB_COMMIT_ALL /* Commit both super blocks */
	113	};
	114
65b4643d RK	115	/*
	116	* Macros to check inode numbers
	117	*/
	118	#define NILFS_MDT_INO_BITS \
af71dda0 NK	119	((unsigned int)(1 << NILFS_DAT_INO \| 1 << NILFS_CPFILE_INO \| \
	120	1 << NILFS_SUFILE_INO \| 1 << NILFS_IFILE_INO \| \
	121	1 << NILFS_ATIME_INO \| 1 << NILFS_SKETCH_INO))
65b4643d RK	122
65b4643d RK	123	#define NILFS_SYS_INO_BITS \
af71dda0	124	((unsigned int)(1 << NILFS_ROOT_INO) \| NILFS_MDT_INO_BITS)
65b4643d	125
e3154e97	126	#define NILFS_FIRST_INO(sb) (((struct the_nilfs *)sb->s_fs_info)->ns_first_ino)
65b4643d RK	127
65b4643d RK	128	#define NILFS_MDT_INODE(sb, ino) \
af71dda0	129	((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & (1 << (ino))))
65b4643d	130	#define NILFS_VALID_INODE(sb, ino) \
af71dda0	131	((ino) >= NILFS_FIRST_INO(sb) \|\| (NILFS_SYS_INO_BITS & (1 << (ino))))
65b4643d RK	132
	133	/**
	134	* struct nilfs_transaction_info: context information for synchronization
	135	* @ti_magic: Magic number
	136	* @ti_save: Backup of journal_info field of task_struct
	137	* @ti_flags: Flags
	138	* @ti_count: Nest level
65b4643d RK	139	*/
	140	struct nilfs_transaction_info {
	141	u32 ti_magic;
	142	void *ti_save;
	143	/* This should never used. If this happens,
	144	one of other filesystems has a bug. */
	145	unsigned short ti_flags;
	146	unsigned short ti_count;
65b4643d RK	147	};
	148
	149	/* ti_magic */
	150	#define NILFS_TI_MAGIC 0xd9e392fb
	151
	152	/* ti_flags */
	153	#define NILFS_TI_DYNAMIC_ALLOC 0x0001 /* Allocated from slab */
	154	#define NILFS_TI_SYNC 0x0002 /* Force to construct segment at the
	155	end of transaction. */
	156	#define NILFS_TI_GC 0x0004 /* GC context */
	157	#define NILFS_TI_COMMIT 0x0008 /* Change happened or not */
	158	#define NILFS_TI_WRITER 0x0010 /* Constructor context */
	159
	160
	161	int nilfs_transaction_begin(struct super_block *,
	162	struct nilfs_transaction_info *, int);
47420c79 RK	163	int nilfs_transaction_commit(struct super_block *);
47420c79 RK	164	void nilfs_transaction_abort(struct super_block *);
65b4643d RK	165
	166	static inline void nilfs_set_transaction_flag(unsigned int flag)
	167	{
	168	struct nilfs_transaction_info *ti = current->journal_info;
	169
65b4643d RK	170	ti->ti_flags \|= flag;
	171	}
	172
	173	static inline int nilfs_test_transaction_flag(unsigned int flag)
	174	{
	175	struct nilfs_transaction_info *ti = current->journal_info;
	176
	177	if (ti == NULL \|\| ti->ti_magic != NILFS_TI_MAGIC)
	178	return 0;
	179	return !!(ti->ti_flags & flag);
	180	}
	181
	182	static inline int nilfs_doing_gc(void)
	183	{
	184	return nilfs_test_transaction_flag(NILFS_TI_GC);
	185	}
	186
	187	static inline int nilfs_doing_construction(void)
	188	{
	189	return nilfs_test_transaction_flag(NILFS_TI_WRITER);
	190	}
	191
65b4643d RK	192	/*
	193	* function prototype
	194	*/
	195	#ifdef CONFIG_NILFS_POSIX_ACL
	196	#error "NILFS: not yet supported POSIX ACL"
65b4643d RK	197	extern int nilfs_acl_chmod(struct inode *);
	198	extern int nilfs_init_acl(struct inode , struct inode );
	199	#else
65b4643d RK	200	static inline int nilfs_acl_chmod(struct inode *inode)
	201	{
	202	return 0;
	203	}
	204
	205	static inline int nilfs_init_acl(struct inode inode, struct inode dir)
	206	{
	207	inode->i_mode &= ~current_umask();
	208	return 0;
	209	}
	210	#endif
	211
	212	#define NILFS_ATIME_DISABLE
	213
b253a3e4 RK	214	/* Flags that should be inherited by new inodes from their parent. */
	215	#define NILFS_FL_INHERITED \
	216	(FS_SECRM_FL \| FS_UNRM_FL \| FS_COMPR_FL \| FS_SYNC_FL \| \
	217	FS_IMMUTABLE_FL \| FS_APPEND_FL \| FS_NODUMP_FL \| FS_NOATIME_FL \|\
	218	FS_COMPRBLK_FL \| FS_NOCOMP_FL \| FS_NOTAIL_FL \| FS_DIRSYNC_FL)
	219
	220	/* Mask out flags that are inappropriate for the given type of inode. */
	221	static inline __u32 nilfs_mask_flags(umode_t mode, __u32 flags)
	222	{
	223	if (S_ISDIR(mode))
	224	return flags;
	225	else if (S_ISREG(mode))
	226	return flags & ~(FS_DIRSYNC_FL \| FS_TOPDIR_FL);
	227	else
	228	return flags & (FS_NODUMP_FL \| FS_NOATIME_FL);
	229	}
	230
65b4643d RK	231	/* dir.c */
65b4643d RK	232	extern int nilfs_add_link(struct dentry , struct inode );
0319003d	233	extern ino_t nilfs_inode_by_name(struct inode , const struct qstr );
65b4643d RK	234	extern int nilfs_make_empty(struct inode , struct inode );
65b4643d RK	235	extern struct nilfs_dir_entry *
0319003d	236	nilfs_find_entry(struct inode , const struct qstr , struct page **);
65b4643d RK	237	extern int nilfs_delete_entry(struct nilfs_dir_entry , struct page );
	238	extern int nilfs_empty_dir(struct inode *);
	239	extern struct nilfs_dir_entry nilfs_dotdot(struct inode , struct page **);
	240	extern void nilfs_set_link(struct inode , struct nilfs_dir_entry ,
	241	struct page , struct inode );
	242
	243	/* file.c */
02c24a82	244	extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
65b4643d RK	245
65b4643d RK	246	/* ioctl.c */
7a946193	247	long nilfs_ioctl(struct file *, unsigned int, unsigned long);
828b1c50	248	long nilfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
4f6b8288 RK	249	int nilfs_ioctl_prepare_clean_segments(struct the_nilfs , struct nilfs_argv ,
4f6b8288 RK	250	void **);
65b4643d RK	251
65b4643d RK	252	/* inode.c */
be667377 RK	253	void nilfs_inode_add_blocks(struct inode *inode, int n);
be667377 RK	254	void nilfs_inode_sub_blocks(struct inode *inode, int n);
c6e49e3f	255	extern struct inode nilfs_new_inode(struct inode , umode_t);
65b4643d RK	256	extern void nilfs_free_inode(struct inode *);
	257	extern int nilfs_get_block(struct inode , sector_t, struct buffer_head , int);
	258	extern void nilfs_set_inode_flags(struct inode *);
	259	extern int nilfs_read_inode_common(struct inode , struct nilfs_inode );
	260	extern void nilfs_write_inode_common(struct inode , struct nilfs_inode , int);
032dbb3b RK	261	struct inode nilfs_ilookup(struct super_block sb, struct nilfs_root *root,
032dbb3b RK	262	unsigned long ino);
f1e89c86 RK	263	struct inode nilfs_iget_locked(struct super_block sb, struct nilfs_root *root,
f1e89c86 RK	264	unsigned long ino);
4d8d9293 RK	265	struct inode nilfs_iget(struct super_block sb, struct nilfs_root *root,
4d8d9293 RK	266	unsigned long ino);
263d90ce RK	267	extern struct inode nilfs_iget_for_gc(struct super_block sb,
263d90ce RK	268	unsigned long ino, __u64 cno);
b9f66140	269	extern void nilfs_update_inode(struct inode , struct buffer_head , int);
65b4643d	270	extern void nilfs_truncate(struct inode *);
6fd1e5c9	271	extern void nilfs_evict_inode(struct inode *);
65b4643d	272	extern int nilfs_setattr(struct dentry , struct iattr );
2d1b399b	273	extern void nilfs_write_failed(struct address_space *mapping, loff_t to);
10556cb2	274	int nilfs_permission(struct inode *inode, int mask);
bcbc8c64	275	int nilfs_load_inode_block(struct inode inode, struct buffer_head *pbh);
65b4643d	276	extern int nilfs_inode_dirty(struct inode *);
bcbc8c64	277	int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty);
b9f66140	278	extern int __nilfs_mark_inode_dirty(struct inode *, int);
aa385729	279	extern void nilfs_dirty_inode(struct inode *, int flags);
622daaff RK	280	int nilfs_fiemap(struct inode inode, struct fiemap_extent_info fieinfo,
622daaff RK	281	__u64 start, __u64 len);
b9f66140 AR	282	static inline int nilfs_mark_inode_dirty(struct inode *inode)
	283	{
	284	return __nilfs_mark_inode_dirty(inode, I_DIRTY);
	285	}
	286	static inline int nilfs_mark_inode_dirty_sync(struct inode *inode)
	287	{
	288	return __nilfs_mark_inode_dirty(inode, I_DIRTY_SYNC);
	289	}
65b4643d	290
65b4643d RK	291	/* super.c */
	292	extern struct inode nilfs_alloc_inode(struct super_block );
	293	extern void nilfs_destroy_inode(struct inode *);
b9075fa9 JP	294	extern __printf(3, 4)
	295	void nilfs_error(struct super_block , const char , const char *, ...);
	296	extern __printf(3, 4)
	297	void nilfs_warning(struct super_block , const char , const char *, ...);
65b4643d	298	extern struct nilfs_super_block *
e339ad31	299	nilfs_read_super_block(struct super_block , u64, int, struct buffer_head *);
65b4643d RK	300	extern int nilfs_store_magic_and_option(struct super_block *,
65b4643d RK	301	struct nilfs_super_block , char );
c5ca48aa RK	302	extern int nilfs_check_feature_compatibility(struct super_block *,
c5ca48aa RK	303	struct nilfs_super_block *);
60f46b7e RK	304	extern void nilfs_set_log_cursor(struct nilfs_super_block *,
60f46b7e RK	305	struct the_nilfs *);
f7545144 RK	306	struct nilfs_super_block *nilfs_prepare_super(struct super_block sb,
	307	int flip);
	308	int nilfs_commit_super(struct super_block *sb, int flag);
	309	int nilfs_cleanup_super(struct super_block *sb);
4e33f9ea	310	int nilfs_resize_fs(struct super_block *sb, __u64 newsize);
f7545144	311	int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
4d8d9293	312	struct nilfs_root **root);
032dbb3b	313	int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno);
65b4643d RK	314
	315	/* gcinode.c */
	316	int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
	317	struct buffer_head **);
	318	int nilfs_gccache_submit_read_node(struct inode *, sector_t, __u64,
	319	struct buffer_head **);
	320	int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
263d90ce RK	321	int nilfs_init_gcinode(struct inode *inode);
263d90ce RK	322	void nilfs_remove_all_gcinodes(struct the_nilfs *nilfs);
65b4643d	323
dd70edbd VD	324	/* sysfs.c */
	325	int __init nilfs_sysfs_init(void);
	326	void nilfs_sysfs_exit(void);
	327	int nilfs_sysfs_create_device_group(struct super_block *);
	328	void nilfs_sysfs_delete_device_group(struct the_nilfs *);
	329	int nilfs_sysfs_create_snapshot_group(struct nilfs_root *);
	330	void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *);
	331
65b4643d RK	332	/*
	333	* Inodes and files operations
	334	*/
828c0950	335	extern const struct file_operations nilfs_dir_operations;
6e1d5dcc	336	extern const struct inode_operations nilfs_file_inode_operations;
828c0950	337	extern const struct file_operations nilfs_file_operations;
7f09410b	338	extern const struct address_space_operations nilfs_aops;
6e1d5dcc AD	339	extern const struct inode_operations nilfs_dir_inode_operations;
	340	extern const struct inode_operations nilfs_special_inode_operations;
	341	extern const struct inode_operations nilfs_symlink_inode_operations;
65b4643d RK	342
	343	/*
	344	* filesystem type
	345	*/
	346	extern struct file_system_type nilfs_fs_type;
	347
	348
	349	#endif /* _NILFS_H */