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

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * nilfs.h - NILFS local header file.
 *
 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
 *
 * 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_api.h>
#include <linux/nilfs2_ondisk.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						\
	(BIT(NILFS_DAT_INO) | BIT(NILFS_CPFILE_INO) |			\
	 BIT(NILFS_SUFILE_INO) | BIT(NILFS_IFILE_INO) |			\
	 BIT(NILFS_ATIME_INO) | BIT(NILFS_SKETCH_INO))

#define NILFS_SYS_INO_BITS (BIT(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 & BIT(ino)))
#define NILFS_VALID_INODE(sb, ino) \
	((ino) >= NILFS_FIRST_INO(sb) || (NILFS_SYS_INO_BITS & BIT(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 be used.  If it 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 int 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_msg(struct super_block *sb, const char *level,
		 const char *fmt, ...);
extern __printf(3, 4)
void __nilfs_error(struct super_block *sb, const char *function,
		   const char *fmt, ...);

#ifdef CONFIG_PRINTK

#define nilfs_msg(sb, level, fmt, ...)					\
	__nilfs_msg(sb, level, fmt, ##__VA_ARGS__)
#define nilfs_error(sb, fmt, ...)					\
	__nilfs_error(sb, __func__, fmt, ##__VA_ARGS__)

#else

#define nilfs_msg(sb, level, fmt, ...)					\
	do {								\
		no_printk(fmt, ##__VA_ARGS__);				\
		(void)(sb);						\
	} while (0)
#define nilfs_error(sb, fmt, ...)					\
	do {								\
		no_printk(fmt, ##__VA_ARGS__);				\
		__nilfs_error(sb, "", " ");				\
	} while (0)

#endif /* CONFIG_PRINTK */

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
ae98043f	1	/* SPDX-License-Identifier: GPL-2.0+ */
65b4643d RK	2	/*
	3	* nilfs.h - NILFS local header file.
	4	*
	5	* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
	6	*
4b420ab4	7	* Written by Koji Sato and Ryusuke Konishi.
65b4643d RK	8	*/
	9
	10	#ifndef _NILFS_H
	11	#define _NILFS_H
	12
	13	#include <linux/kernel.h>
	14	#include <linux/buffer_head.h>
	15	#include <linux/spinlock.h>
	16	#include <linux/blkdev.h>
e63e88bc RK	17	#include <linux/nilfs2_api.h>
e63e88bc RK	18	#include <linux/nilfs2_ondisk.h>
65b4643d	19	#include "the_nilfs.h"
65b4643d	20	#include "bmap.h"
65b4643d	21
f5974c8f VD	22	/**
	23	* struct nilfs_inode_info - nilfs inode data in memory
	24	* @i_flags: inode flags
	25	* @i_state: dynamic state flags
	26	* @i_bmap: pointer on i_bmap_data
	27	* @i_bmap_data: raw block mapping
	28	* @i_xattr: <TODO>
	29	* @i_dir_start_lookup: page index of last successful search
	30	* @i_cno: checkpoint number for GC inode
	31	* @i_btnode_cache: cached pages of b-tree nodes
	32	* @i_dirty: list for connecting dirty files
	33	* @xattr_sem: semaphore for extended attributes processing
	34	* @i_bh: buffer contains disk inode
	35	* @i_root: root object of the current filesystem tree
	36	* @vfs_inode: VFS inode object
65b4643d RK	37	*/
	38	struct nilfs_inode_info {
	39	__u32 i_flags;
	40	unsigned long i_state; /* Dynamic state flags */
	41	struct nilfs_bmap *i_bmap;
05d0e94b	42	struct nilfs_bmap i_bmap_data;
65b4643d	43	__u64 i_xattr; /* sector_t ??? */
65b4643d RK	44	__u32 i_dir_start_lookup;
	45	__u64 i_cno; /* check point number for GC inode */
	46	struct address_space i_btnode_cache;
	47	struct list_head i_dirty; /* List for connecting dirty files */
	48
	49	#ifdef CONFIG_NILFS_XATTR
	50	/*
	51	* Extended attributes can be read independently of the main file
	52	* data. Taking i_sem even when reading would cause contention
	53	* between readers of EAs and writers of regular file data, so
	54	* instead we synchronize on xattr_sem when reading or changing
	55	* EAs.
	56	*/
	57	struct rw_semaphore xattr_sem;
65b4643d	58	#endif
076a378b RK	59	struct buffer_head i_bh; /
	60	* i_bh contains a new or dirty
	61	* disk inode.
	62	*/
4d8d9293	63	struct nilfs_root *i_root;
65b4643d RK	64	struct inode vfs_inode;
	65	};
	66
	67	static inline struct nilfs_inode_info NILFS_I(const struct inode inode)
	68	{
	69	return container_of(inode, struct nilfs_inode_info, vfs_inode);
	70	}
	71
	72	static inline struct nilfs_inode_info *
	73	NILFS_BMAP_I(const struct nilfs_bmap *bmap)
	74	{
05d0e94b	75	return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
65b4643d RK	76	}
	77
	78	static inline struct inode NILFS_BTNC_I(struct address_space btnc)
	79	{
	80	struct nilfs_inode_info *ii =
	81	container_of(btnc, struct nilfs_inode_info, i_btnode_cache);
	82	return &ii->vfs_inode;
	83	}
	84
65b4643d RK	85	/*
	86	* Dynamic state flags of NILFS on-memory inode (i_state)
	87	*/
	88	enum {
	89	NILFS_I_NEW = 0, /* Inode is newly created */
	90	NILFS_I_DIRTY, /* The file is dirty */
	91	NILFS_I_QUEUED, /* inode is in dirty_files list */
076a378b RK	92	NILFS_I_BUSY, /*
	93	* Inode is grabbed by a segment
	94	* constructor
	95	*/
65b4643d RK	96	NILFS_I_COLLECTED, /* All dirty blocks are collected */
65b4643d RK	97	NILFS_I_UPDATED, /* The file has been written back */
b9f66140	98	NILFS_I_INODE_SYNC, /* dsync is not allowed for inode */
65b4643d RK	99	NILFS_I_BMAP, /* has bmap and btnode_cache */
65b4643d RK	100	NILFS_I_GCINODE, /* inode for GC, on memory only */
65b4643d RK	101	};
65b4643d RK	102
b2ac86e1 JS	103	/*
	104	* commit flags for nilfs_commit_super and nilfs_sync_super
	105	*/
	106	enum {
	107	NILFS_SB_COMMIT = 0, /* Commit a super block alternately */
	108	NILFS_SB_COMMIT_ALL /* Commit both super blocks */
	109	};
	110
65b4643d RK	111	/*
	112	* Macros to check inode numbers
	113	*/
4ce5c342 RK	114	#define NILFS_MDT_INO_BITS \
	115	(BIT(NILFS_DAT_INO) \| BIT(NILFS_CPFILE_INO) \| \
	116	BIT(NILFS_SUFILE_INO) \| BIT(NILFS_IFILE_INO) \| \
	117	BIT(NILFS_ATIME_INO) \| BIT(NILFS_SKETCH_INO))
65b4643d	118
4ce5c342	119	#define NILFS_SYS_INO_BITS (BIT(NILFS_ROOT_INO) \| NILFS_MDT_INO_BITS)
65b4643d	120
e3154e97	121	#define NILFS_FIRST_INO(sb) (((struct the_nilfs *)sb->s_fs_info)->ns_first_ino)
65b4643d RK	122
65b4643d RK	123	#define NILFS_MDT_INODE(sb, ino) \
4ce5c342	124	((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & BIT(ino)))
65b4643d	125	#define NILFS_VALID_INODE(sb, ino) \
4ce5c342	126	((ino) >= NILFS_FIRST_INO(sb) \|\| (NILFS_SYS_INO_BITS & BIT(ino)))
65b4643d RK	127
	128	/**
	129	* struct nilfs_transaction_info: context information for synchronization
	130	* @ti_magic: Magic number
	131	* @ti_save: Backup of journal_info field of task_struct
	132	* @ti_flags: Flags
	133	* @ti_count: Nest level
65b4643d RK	134	*/
	135	struct nilfs_transaction_info {
	136	u32 ti_magic;
	137	void *ti_save;
076a378b RK	138	/*
	139	* This should never be used. If it happens,
	140	* one of other filesystems has a bug.
	141	*/
65b4643d RK	142	unsigned short ti_flags;
65b4643d RK	143	unsigned short ti_count;
65b4643d RK	144	};
	145
	146	/* ti_magic */
	147	#define NILFS_TI_MAGIC 0xd9e392fb
	148
	149	/* ti_flags */
	150	#define NILFS_TI_DYNAMIC_ALLOC 0x0001 /* Allocated from slab */
076a378b RK	151	#define NILFS_TI_SYNC 0x0002 /*
	152	* Force to construct segment at the
	153	* end of transaction.
	154	*/
65b4643d RK	155	#define NILFS_TI_GC 0x0004 /* GC context */
	156	#define NILFS_TI_COMMIT 0x0008 /* Change happened or not */
	157	#define NILFS_TI_WRITER 0x0010 /* Constructor context */
	158
	159
	160	int nilfs_transaction_begin(struct super_block *,
	161	struct nilfs_transaction_info *, int);
47420c79 RK	162	int nilfs_transaction_commit(struct super_block *);
47420c79 RK	163	void nilfs_transaction_abort(struct super_block *);
65b4643d RK	164
	165	static inline void nilfs_set_transaction_flag(unsigned int flag)
	166	{
	167	struct nilfs_transaction_info *ti = current->journal_info;
	168
65b4643d RK	169	ti->ti_flags \|= flag;
	170	}
	171
	172	static inline int nilfs_test_transaction_flag(unsigned int flag)
	173	{
	174	struct nilfs_transaction_info *ti = current->journal_info;
	175
	176	if (ti == NULL \|\| ti->ti_magic != NILFS_TI_MAGIC)
	177	return 0;
	178	return !!(ti->ti_flags & flag);
	179	}
	180
	181	static inline int nilfs_doing_gc(void)
	182	{
	183	return nilfs_test_transaction_flag(NILFS_TI_GC);
	184	}
	185
	186	static inline int nilfs_doing_construction(void)
	187	{
	188	return nilfs_test_transaction_flag(NILFS_TI_WRITER);
	189	}
	190
65b4643d RK	191	/*
	192	* function prototype
	193	*/
	194	#ifdef CONFIG_NILFS_POSIX_ACL
	195	#error "NILFS: not yet supported POSIX ACL"
65b4643d RK	196	extern int nilfs_acl_chmod(struct inode *);
	197	extern int nilfs_init_acl(struct inode , struct inode );
	198	#else
65b4643d RK	199	static inline int nilfs_acl_chmod(struct inode *inode)
	200	{
	201	return 0;
	202	}
	203
	204	static inline int nilfs_init_acl(struct inode inode, struct inode dir)
	205	{
	206	inode->i_mode &= ~current_umask();
	207	return 0;
	208	}
	209	#endif
	210
	211	#define NILFS_ATIME_DISABLE
	212
b253a3e4 RK	213	/* Flags that should be inherited by new inodes from their parent. */
	214	#define NILFS_FL_INHERITED \
	215	(FS_SECRM_FL \| FS_UNRM_FL \| FS_COMPR_FL \| FS_SYNC_FL \| \
	216	FS_IMMUTABLE_FL \| FS_APPEND_FL \| FS_NODUMP_FL \| FS_NOATIME_FL \|\
	217	FS_COMPRBLK_FL \| FS_NOCOMP_FL \| FS_NOTAIL_FL \| FS_DIRSYNC_FL)
	218
	219	/* Mask out flags that are inappropriate for the given type of inode. */
	220	static inline __u32 nilfs_mask_flags(umode_t mode, __u32 flags)
	221	{
	222	if (S_ISDIR(mode))
	223	return flags;
	224	else if (S_ISREG(mode))
	225	return flags & ~(FS_DIRSYNC_FL \| FS_TOPDIR_FL);
	226	else
	227	return flags & (FS_NODUMP_FL \| FS_NOATIME_FL);
	228	}
	229
65b4643d RK	230	/* dir.c */
65b4643d RK	231	extern int nilfs_add_link(struct dentry , struct inode );
0319003d	232	extern ino_t nilfs_inode_by_name(struct inode , const struct qstr );
65b4643d RK	233	extern int nilfs_make_empty(struct inode , struct inode );
65b4643d RK	234	extern struct nilfs_dir_entry *
0319003d	235	nilfs_find_entry(struct inode , const struct qstr , struct page **);
65b4643d RK	236	extern int nilfs_delete_entry(struct nilfs_dir_entry , struct page );
	237	extern int nilfs_empty_dir(struct inode *);
	238	extern struct nilfs_dir_entry nilfs_dotdot(struct inode , struct page **);
	239	extern void nilfs_set_link(struct inode , struct nilfs_dir_entry ,
	240	struct page , struct inode );
	241
	242	/* file.c */
02c24a82	243	extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
65b4643d RK	244
65b4643d RK	245	/* ioctl.c */
7a946193	246	long nilfs_ioctl(struct file *, unsigned int, unsigned long);
828b1c50	247	long nilfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
4f6b8288 RK	248	int nilfs_ioctl_prepare_clean_segments(struct the_nilfs , struct nilfs_argv ,
4f6b8288 RK	249	void **);
65b4643d RK	250
65b4643d RK	251	/* inode.c */
be667377 RK	252	void nilfs_inode_add_blocks(struct inode *inode, int n);
be667377 RK	253	void nilfs_inode_sub_blocks(struct inode *inode, int n);
c6e49e3f	254	extern struct inode nilfs_new_inode(struct inode , umode_t);
65b4643d RK	255	extern void nilfs_free_inode(struct inode *);
	256	extern int nilfs_get_block(struct inode , sector_t, struct buffer_head , int);
	257	extern void nilfs_set_inode_flags(struct inode *);
	258	extern int nilfs_read_inode_common(struct inode , struct nilfs_inode );
	259	extern void nilfs_write_inode_common(struct inode , struct nilfs_inode , int);
032dbb3b RK	260	struct inode nilfs_ilookup(struct super_block sb, struct nilfs_root *root,
032dbb3b RK	261	unsigned long ino);
f1e89c86 RK	262	struct inode nilfs_iget_locked(struct super_block sb, struct nilfs_root *root,
f1e89c86 RK	263	unsigned long ino);
4d8d9293 RK	264	struct inode nilfs_iget(struct super_block sb, struct nilfs_root *root,
4d8d9293 RK	265	unsigned long ino);
263d90ce RK	266	extern struct inode nilfs_iget_for_gc(struct super_block sb,
263d90ce RK	267	unsigned long ino, __u64 cno);
b9f66140	268	extern void nilfs_update_inode(struct inode , struct buffer_head , int);
65b4643d	269	extern void nilfs_truncate(struct inode *);
6fd1e5c9	270	extern void nilfs_evict_inode(struct inode *);
65b4643d	271	extern int nilfs_setattr(struct dentry , struct iattr );
2d1b399b	272	extern void nilfs_write_failed(struct address_space *mapping, loff_t to);
10556cb2	273	int nilfs_permission(struct inode *inode, int mask);
bcbc8c64	274	int nilfs_load_inode_block(struct inode inode, struct buffer_head *pbh);
65b4643d	275	extern int nilfs_inode_dirty(struct inode *);
0c6c44cb	276	int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty);
b9f66140	277	extern int __nilfs_mark_inode_dirty(struct inode *, int);
aa385729	278	extern void nilfs_dirty_inode(struct inode *, int flags);
622daaff RK	279	int nilfs_fiemap(struct inode inode, struct fiemap_extent_info fieinfo,
622daaff RK	280	__u64 start, __u64 len);
b9f66140 AR	281	static inline int nilfs_mark_inode_dirty(struct inode *inode)
	282	{
	283	return __nilfs_mark_inode_dirty(inode, I_DIRTY);
	284	}
	285	static inline int nilfs_mark_inode_dirty_sync(struct inode *inode)
	286	{
	287	return __nilfs_mark_inode_dirty(inode, I_DIRTY_SYNC);
	288	}
65b4643d	289
65b4643d RK	290	/* super.c */
	291	extern struct inode nilfs_alloc_inode(struct super_block );
	292	extern void nilfs_destroy_inode(struct inode *);
cae3d4ca	293
a66dfb0a RK	294	extern __printf(3, 4)
	295	void __nilfs_msg(struct super_block sb, const char level,
	296	const char *fmt, ...);
b9075fa9	297	extern __printf(3, 4)
cae3d4ca RK	298	void __nilfs_error(struct super_block sb, const char function,
cae3d4ca RK	299	const char *fmt, ...);
cae3d4ca RK	300
	301	#ifdef CONFIG_PRINTK
	302
a66dfb0a RK	303	#define nilfs_msg(sb, level, fmt, ...) \
a66dfb0a RK	304	__nilfs_msg(sb, level, fmt, ##__VA_ARGS__)
cae3d4ca RK	305	#define nilfs_error(sb, fmt, ...) \
	306	__nilfs_error(sb, __func__, fmt, ##__VA_ARGS__)
	307
	308	#else
	309
a66dfb0a	310	#define nilfs_msg(sb, level, fmt, ...) \
d6517deb RK	311	do { \
	312	no_printk(fmt, ##__VA_ARGS__); \
	313	(void)(sb); \
	314	} while (0)
cae3d4ca RK	315	#define nilfs_error(sb, fmt, ...) \
	316	do { \
	317	no_printk(fmt, ##__VA_ARGS__); \
	318	__nilfs_error(sb, "", " "); \
	319	} while (0)
	320
	321	#endif /* CONFIG_PRINTK */
	322
65b4643d	323	extern struct nilfs_super_block *
e339ad31	324	nilfs_read_super_block(struct super_block , u64, int, struct buffer_head *);
65b4643d RK	325	extern int nilfs_store_magic_and_option(struct super_block *,
65b4643d RK	326	struct nilfs_super_block , char );
c5ca48aa RK	327	extern int nilfs_check_feature_compatibility(struct super_block *,
c5ca48aa RK	328	struct nilfs_super_block *);
60f46b7e RK	329	extern void nilfs_set_log_cursor(struct nilfs_super_block *,
60f46b7e RK	330	struct the_nilfs *);
f7545144 RK	331	struct nilfs_super_block *nilfs_prepare_super(struct super_block sb,
	332	int flip);
	333	int nilfs_commit_super(struct super_block *sb, int flag);
	334	int nilfs_cleanup_super(struct super_block *sb);
4e33f9ea	335	int nilfs_resize_fs(struct super_block *sb, __u64 newsize);
f7545144	336	int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
4d8d9293	337	struct nilfs_root **root);
032dbb3b	338	int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno);
65b4643d RK	339
	340	/* gcinode.c */
	341	int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
	342	struct buffer_head **);
	343	int nilfs_gccache_submit_read_node(struct inode *, sector_t, __u64,
	344	struct buffer_head **);
	345	int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
263d90ce RK	346	int nilfs_init_gcinode(struct inode *inode);
263d90ce RK	347	void nilfs_remove_all_gcinodes(struct the_nilfs *nilfs);
65b4643d	348
dd70edbd VD	349	/* sysfs.c */
	350	int __init nilfs_sysfs_init(void);
	351	void nilfs_sysfs_exit(void);
	352	int nilfs_sysfs_create_device_group(struct super_block *);
	353	void nilfs_sysfs_delete_device_group(struct the_nilfs *);
	354	int nilfs_sysfs_create_snapshot_group(struct nilfs_root *);
	355	void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *);
	356
65b4643d RK	357	/*
	358	* Inodes and files operations
	359	*/
828c0950	360	extern const struct file_operations nilfs_dir_operations;
6e1d5dcc	361	extern const struct inode_operations nilfs_file_inode_operations;
828c0950	362	extern const struct file_operations nilfs_file_operations;
7f09410b	363	extern const struct address_space_operations nilfs_aops;
6e1d5dcc AD	364	extern const struct inode_operations nilfs_dir_inode_operations;
	365	extern const struct inode_operations nilfs_special_inode_operations;
	366	extern const struct inode_operations nilfs_symlink_inode_operations;
65b4643d RK	367
	368	/*
	369	* filesystem type
	370	*/
	371	extern struct file_system_type nilfs_fs_type;
	372
	373
	374	#endif /* _NILFS_H */