[linux-2.6-block.git] / fs / fuse / fuse_i.h

/*
  FUSE: Filesystem in Userspace
  Copyright (C) 2001-2005  Miklos Szeredi <miklos@szeredi.hu>

  This program can be distributed under the terms of the GNU GPL.
  See the file COPYING.
*/

#include <linux/fuse.h>
#include <linux/fs.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/backing-dev.h>
#include <asm/semaphore.h>

/** Max number of pages that can be used in a single read request */
#define FUSE_MAX_PAGES_PER_REQ 32

/** If more requests are outstanding, then the operation will block */
#define FUSE_MAX_OUTSTANDING 10

/** It could be as large as PATH_MAX, but would that have any uses? */
#define FUSE_NAME_MAX 1024

/** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
    module will check permissions based on the file mode.  Otherwise no
    permission checking is done in the kernel */
#define FUSE_DEFAULT_PERMISSIONS (1 << 0)

/** If the FUSE_ALLOW_OTHER flag is given, then not only the user
    doing the mount will be allowed to access the filesystem */
#define FUSE_ALLOW_OTHER         (1 << 1)


/** FUSE inode */
struct fuse_inode {
	/** Inode data */
	struct inode inode;

	/** Unique ID, which identifies the inode between userspace
	 * and kernel */
	u64 nodeid;

	/** Number of lookups on this inode */
	u64 nlookup;

	/** The request used for sending the FORGET message */
	struct fuse_req *forget_req;

	/** Time in jiffies until the file attributes are valid */
	unsigned long i_time;
};

/** FUSE specific file data */
struct fuse_file {
	/** Request reserved for flush and release */
	struct fuse_req *release_req;

	/** File handle used by userspace */
	u64 fh;
};

/** One input argument of a request */
struct fuse_in_arg {
	unsigned size;
	const void *value;
};

/** The request input */
struct fuse_in {
	/** The request header */
	struct fuse_in_header h;

	/** True if the data for the last argument is in req->pages */
	unsigned argpages:1;

	/** Number of arguments */
	unsigned numargs;

	/** Array of arguments */
	struct fuse_in_arg args[3];
};

/** One output argument of a request */
struct fuse_arg {
	unsigned size;
	void *value;
};

/** The request output */
struct fuse_out {
	/** Header returned from userspace */
	struct fuse_out_header h;

	/** Last argument is variable length (can be shorter than
	    arg->size) */
	unsigned argvar:1;

	/** Last argument is a list of pages to copy data to */
	unsigned argpages:1;

	/** Zero partially or not copied pages */
	unsigned page_zeroing:1;

	/** Number or arguments */
	unsigned numargs;

	/** Array of arguments */
	struct fuse_arg args[3];
};

/** The request state */
enum fuse_req_state {
	FUSE_REQ_INIT = 0,
	FUSE_REQ_PENDING,
	FUSE_REQ_READING,
	FUSE_REQ_SENT,
	FUSE_REQ_FINISHED
};

struct fuse_conn;

/**
 * A request to the client
 */
struct fuse_req {
	/** This can be on either unused_list, pending processing or
	    io lists in fuse_conn */
	struct list_head list;

	/** Entry on the background list */
	struct list_head bg_entry;

	/** refcount */
	atomic_t count;

	/** True if the request has reply */
	unsigned isreply:1;

	/** The request is preallocated */
	unsigned preallocated:1;

	/** The request was interrupted */
	unsigned interrupted:1;

	/** Request is sent in the background */
	unsigned background:1;

	/** Data is being copied to/from the request */
	unsigned locked:1;

	/** State of the request */
	enum fuse_req_state state;

	/** The request input */
	struct fuse_in in;

	/** The request output */
	struct fuse_out out;

	/** Used to wake up the task waiting for completion of request*/
	wait_queue_head_t waitq;

	/** Data for asynchronous requests */
	union {
		struct fuse_forget_in forget_in;
		struct fuse_release_in release_in;
		struct fuse_init_in init_in;
		struct fuse_init_out init_out;
		struct fuse_read_in read_in;
	} misc;

	/** page vector */
	struct page *pages[FUSE_MAX_PAGES_PER_REQ];

	/** number of pages in vector */
	unsigned num_pages;

	/** offset of data on first page */
	unsigned page_offset;

	/** Inode used in the request */
	struct inode *inode;

	/** Second inode used in the request (or NULL) */
	struct inode *inode2;

	/** File used in the request (or NULL) */
	struct file *file;

	/** Request completion callback */
	void (*end)(struct fuse_conn *, struct fuse_req *);
};

/**
 * A Fuse connection.
 *
 * This structure is created, when the filesystem is mounted, and is
 * destroyed, when the client device is closed and the filesystem is
 * unmounted.
 */
struct fuse_conn {
	/** The user id for this mount */
	uid_t user_id;

	/** The group id for this mount */
	gid_t group_id;

	/** The fuse mount flags for this mount */
	unsigned flags;

	/** Maximum read size */
	unsigned max_read;

	/** Maximum write size */
	unsigned max_write;

	/** Readers of the connection are waiting on this */
	wait_queue_head_t waitq;

	/** The list of pending requests */
	struct list_head pending;

	/** The list of requests being processed */
	struct list_head processing;

	/** The list of requests under I/O */
	struct list_head io;

	/** Requests put in the background (RELEASE or any other
	    interrupted request) */
	struct list_head background;

	/** Controls the maximum number of outstanding requests */
	struct semaphore outstanding_sem;

	/** This counts the number of outstanding requests if
	    outstanding_sem would go negative */
	unsigned outstanding_debt;

	/** RW semaphore for exclusion with fuse_put_super() */
	struct rw_semaphore sbput_sem;

	/** The list of unused requests */
	struct list_head unused_list;

	/** The next unique request id */
	u64 reqctr;

	/** Mount is active */
	unsigned mounted : 1;

	/** Connection established, cleared on umount, connection
	    abort and device release */
	unsigned connected : 1;

	/** Connection failed (version mismatch) */
	unsigned conn_error : 1;

	/** Is fsync not implemented by fs? */
	unsigned no_fsync : 1;

	/** Is fsyncdir not implemented by fs? */
	unsigned no_fsyncdir : 1;

	/** Is flush not implemented by fs? */
	unsigned no_flush : 1;

	/** Is setxattr not implemented by fs? */
	unsigned no_setxattr : 1;

	/** Is getxattr not implemented by fs? */
	unsigned no_getxattr : 1;

	/** Is listxattr not implemented by fs? */
	unsigned no_listxattr : 1;

	/** Is removexattr not implemented by fs? */
	unsigned no_removexattr : 1;

	/** Is access not implemented by fs? */
	unsigned no_access : 1;

	/** Is create not implemented by fs? */
	unsigned no_create : 1;

	/** The number of requests waiting for completion */
	atomic_t num_waiting;

	/** Negotiated minor version */
	unsigned minor;

	/** Backing dev info */
	struct backing_dev_info bdi;

	/** kobject */
	struct kobject kobj;
};

static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
{
	return sb->s_fs_info;
}

static inline struct fuse_conn *get_fuse_conn(struct inode *inode)
{
	return get_fuse_conn_super(inode->i_sb);
}

static inline struct fuse_conn *get_fuse_conn_kobj(struct kobject *obj)
{
	return container_of(obj, struct fuse_conn, kobj);
}

static inline struct fuse_inode *get_fuse_inode(struct inode *inode)
{
	return container_of(inode, struct fuse_inode, inode);
}

static inline u64 get_node_id(struct inode *inode)
{
	return get_fuse_inode(inode)->nodeid;
}

/** Device operations */
extern struct file_operations fuse_dev_operations;

/**
 * This is the single global spinlock which protects FUSE's structures
 *
 * The following data is protected by this lock:
 *
 *  - the private_data field of the device file
 *  - the s_fs_info field of the super block
 *  - unused_list, pending, processing lists in fuse_conn
 *  - background list in fuse_conn
 *  - the unique request ID counter reqctr in fuse_conn
 *  - the sb (super_block) field in fuse_conn
 *  - the file (device file) field in fuse_conn
 */
extern spinlock_t fuse_lock;

/**
 * Get a filled in inode
 */
struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
			int generation, struct fuse_attr *attr);

/**
 * Send FORGET command
 */
void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req,
		      unsigned long nodeid, u64 nlookup);

/**
 * Initialize READ or READDIR request
 */
void fuse_read_fill(struct fuse_req *req, struct file *file,
		    struct inode *inode, loff_t pos, size_t count, int opcode);

/**
 * Send OPEN or OPENDIR request
 */
int fuse_open_common(struct inode *inode, struct file *file, int isdir);

struct fuse_file *fuse_file_alloc(void);
void fuse_file_free(struct fuse_file *ff);
void fuse_finish_open(struct inode *inode, struct file *file,
		      struct fuse_file *ff, struct fuse_open_out *outarg);

/**
 * Send a RELEASE request
 */
void fuse_send_release(struct fuse_conn *fc, struct fuse_file *ff,
		       u64 nodeid, struct inode *inode, int flags, int isdir);

/**
 * Send RELEASE or RELEASEDIR request
 */
int fuse_release_common(struct inode *inode, struct file *file, int isdir);

/**
 * Send FSYNC or FSYNCDIR request
 */
int fuse_fsync_common(struct file *file, struct dentry *de, int datasync,
		      int isdir);

/**
 * Initialize file operations on a regular file
 */
void fuse_init_file_inode(struct inode *inode);

/**
 * Initialize inode operations on regular files and special files
 */
void fuse_init_common(struct inode *inode);

/**
 * Initialize inode and file operations on a directory
 */
void fuse_init_dir(struct inode *inode);

/**
 * Initialize inode operations on a symlink
 */
void fuse_init_symlink(struct inode *inode);

/**
 * Change attributes of an inode
 */
void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr);

/**
 * Initialize the client device
 */
int fuse_dev_init(void);

/**
 * Cleanup the client device
 */
void fuse_dev_cleanup(void);

/**
 * Allocate a request
 */
struct fuse_req *fuse_request_alloc(void);

/**
 * Free a request
 */
void fuse_request_free(struct fuse_req *req);

/**
 * Reinitialize a request, the preallocated flag is left unmodified
 */
void fuse_reset_request(struct fuse_req *req);

/**
 * Reserve a preallocated request
 */
struct fuse_req *fuse_get_request(struct fuse_conn *fc);

/**
 * Decrement reference count of a request.  If count goes to zero put
 * on unused list (preallocated) or free request (not preallocated).
 */
void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req);

/**
 * Send a request (synchronous)
 */
void request_send(struct fuse_conn *fc, struct fuse_req *req);

/**
 * Send a request with no reply
 */
void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);

/**
 * Send a request in the background
 */
void request_send_background(struct fuse_conn *fc, struct fuse_req *req);

/**
 * Release inodes and file associated with background request
 */
void fuse_release_background(struct fuse_req *req);

/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc);

/**
 * Get the attributes of a file
 */
int fuse_do_getattr(struct inode *inode);

/**
 * Invalidate inode attributes
 */
void fuse_invalidate_attr(struct inode *inode);
Commit	Line	Data
d8a5ba45 MS	1	/*
	2	FUSE: Filesystem in Userspace
	3	Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu>
	4
	5	This program can be distributed under the terms of the GNU GPL.
	6	See the file COPYING.
	7	*/
	8
	9	#include <linux/fuse.h>
	10	#include <linux/fs.h>
	11	#include <linux/wait.h>
	12	#include <linux/list.h>
	13	#include <linux/spinlock.h>
	14	#include <linux/mm.h>
	15	#include <linux/backing-dev.h>
	16	#include <asm/semaphore.h>
	17
334f485d MS	18	/** Max number of pages that can be used in a single read request */
	19	#define FUSE_MAX_PAGES_PER_REQ 32
	20
	21	/** If more requests are outstanding, then the operation will block */
	22	#define FUSE_MAX_OUTSTANDING 10
	23
1d3d752b MS	24	/** It could be as large as PATH_MAX, but would that have any uses? */
	25	#define FUSE_NAME_MAX 1024
	26
1e9a4ed9 MS	27	/** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
	28	module will check permissions based on the file mode. Otherwise no
	29	permission checking is done in the kernel */
	30	#define FUSE_DEFAULT_PERMISSIONS (1 << 0)
	31
	32	/** If the FUSE_ALLOW_OTHER flag is given, then not only the user
	33	doing the mount will be allowed to access the filesystem */
	34	#define FUSE_ALLOW_OTHER (1 << 1)
	35
413ef8cb	36
d8a5ba45 MS	37	/** FUSE inode */
	38	struct fuse_inode {
	39	/** Inode data */
	40	struct inode inode;
	41
	42	/** Unique ID, which identifies the inode between userspace
	43	* and kernel */
	44	u64 nodeid;
	45
9e6268db MS	46	/** Number of lookups on this inode */
	47	u64 nlookup;
	48
e5e5558e MS	49	/** The request used for sending the FORGET message */
	50	struct fuse_req *forget_req;
	51
d8a5ba45 MS	52	/** Time in jiffies until the file attributes are valid */
	53	unsigned long i_time;
	54	};
	55
b6aeaded MS	56	/** FUSE specific file data */
	57	struct fuse_file {
	58	/** Request reserved for flush and release */
	59	struct fuse_req *release_req;
	60
	61	/** File handle used by userspace */
	62	u64 fh;
	63	};
	64
334f485d MS	65	/** One input argument of a request */
	66	struct fuse_in_arg {
	67	unsigned size;
	68	const void *value;
	69	};
	70
	71	/** The request input */
	72	struct fuse_in {
	73	/** The request header */
	74	struct fuse_in_header h;
	75
	76	/** True if the data for the last argument is in req->pages */
	77	unsigned argpages:1;
	78
	79	/** Number of arguments */
	80	unsigned numargs;
	81
	82	/** Array of arguments */
	83	struct fuse_in_arg args[3];
	84	};
	85
	86	/** One output argument of a request */
	87	struct fuse_arg {
	88	unsigned size;
	89	void *value;
	90	};
	91
	92	/** The request output */
	93	struct fuse_out {
	94	/** Header returned from userspace */
	95	struct fuse_out_header h;
	96
	97	/** Last argument is variable length (can be shorter than
	98	arg->size) */
	99	unsigned argvar:1;
	100
	101	/** Last argument is a list of pages to copy data to */
	102	unsigned argpages:1;
	103
	104	/** Zero partially or not copied pages */
	105	unsigned page_zeroing:1;
	106
	107	/** Number or arguments */
	108	unsigned numargs;
	109
	110	/** Array of arguments */
	111	struct fuse_arg args[3];
	112	};
	113
83cfd493 MS	114	/** The request state */
	115	enum fuse_req_state {
	116	FUSE_REQ_INIT = 0,
	117	FUSE_REQ_PENDING,
	118	FUSE_REQ_READING,
	119	FUSE_REQ_SENT,
	120	FUSE_REQ_FINISHED
	121	};
	122
64c6d8ed MS	123	struct fuse_conn;
64c6d8ed MS	124
334f485d MS	125	/**
	126	* A request to the client
	127	*/
	128	struct fuse_req {
d77a1d5b MS	129	/** This can be on either unused_list, pending processing or
d77a1d5b MS	130	io lists in fuse_conn */
334f485d MS	131	struct list_head list;
334f485d MS	132
1e9a4ed9 MS	133	/** Entry on the background list */
	134	struct list_head bg_entry;
	135
334f485d MS	136	/** refcount */
	137	atomic_t count;
	138
	139	/** True if the request has reply */
	140	unsigned isreply:1;
	141
	142	/** The request is preallocated */
	143	unsigned preallocated:1;
	144
	145	/** The request was interrupted */
	146	unsigned interrupted:1;
	147
	148	/** Request is sent in the background */
	149	unsigned background:1;
	150
	151	/** Data is being copied to/from the request */
	152	unsigned locked:1;
	153
83cfd493 MS	154	/** State of the request */
83cfd493 MS	155	enum fuse_req_state state;
334f485d MS	156
	157	/** The request input */
	158	struct fuse_in in;
	159
	160	/** The request output */
	161	struct fuse_out out;
	162
	163	/** Used to wake up the task waiting for completion of request*/
	164	wait_queue_head_t waitq;
	165
	166	/** Data for asynchronous requests */
	167	union {
e5e5558e	168	struct fuse_forget_in forget_in;
b6aeaded	169	struct fuse_release_in release_in;
3ec870d5 MS	170	struct fuse_init_in init_in;
3ec870d5 MS	171	struct fuse_init_out init_out;
361b1eb5	172	struct fuse_read_in read_in;
334f485d MS	173	} misc;
	174
	175	/** page vector */
	176	struct page *pages[FUSE_MAX_PAGES_PER_REQ];
	177
	178	/** number of pages in vector */
	179	unsigned num_pages;
	180
	181	/** offset of data on first page */
	182	unsigned page_offset;
	183
	184	/** Inode used in the request */
	185	struct inode *inode;
	186
	187	/** Second inode used in the request (or NULL) */
	188	struct inode *inode2;
	189
	190	/** File used in the request (or NULL) */
	191	struct file *file;
64c6d8ed MS	192
	193	/** Request completion callback */
	194	void (end)(struct fuse_conn , struct fuse_req *);
334f485d MS	195	};
334f485d MS	196
d8a5ba45 MS	197	/**
	198	* A Fuse connection.
	199	*
	200	* This structure is created, when the filesystem is mounted, and is
	201	* destroyed, when the client device is closed and the filesystem is
	202	* unmounted.
	203	*/
	204	struct fuse_conn {
d8a5ba45 MS	205	/** The user id for this mount */
	206	uid_t user_id;
	207
87729a55 MS	208	/** The group id for this mount */
	209	gid_t group_id;
	210
1e9a4ed9 MS	211	/** The fuse mount flags for this mount */
	212	unsigned flags;
	213
db50b96c MS	214	/** Maximum read size */
	215	unsigned max_read;
	216
413ef8cb MS	217	/** Maximum write size */
	218	unsigned max_write;
	219
334f485d MS	220	/** Readers of the connection are waiting on this */
	221	wait_queue_head_t waitq;
	222
	223	/** The list of pending requests */
	224	struct list_head pending;
	225
	226	/** The list of requests being processed */
	227	struct list_head processing;
	228
d77a1d5b MS	229	/** The list of requests under I/O */
	230	struct list_head io;
	231
1e9a4ed9 MS	232	/** Requests put in the background (RELEASE or any other
	233	interrupted request) */
	234	struct list_head background;
	235
334f485d MS	236	/** Controls the maximum number of outstanding requests */
	237	struct semaphore outstanding_sem;
	238
	239	/** This counts the number of outstanding requests if
	240	outstanding_sem would go negative */
	241	unsigned outstanding_debt;
	242
1e9a4ed9 MS	243	/** RW semaphore for exclusion with fuse_put_super() */
	244	struct rw_semaphore sbput_sem;
	245
334f485d MS	246	/** The list of unused requests */
	247	struct list_head unused_list;
	248
	249	/** The next unique request id */
	250	u64 reqctr;
	251
1e9a4ed9 MS	252	/** Mount is active */
	253	unsigned mounted : 1;
	254
69a53bf2 MS	255	/** Connection established, cleared on umount, connection
69a53bf2 MS	256	abort and device release */
1e9a4ed9 MS	257	unsigned connected : 1;
1e9a4ed9 MS	258
334f485d MS	259	/** Connection failed (version mismatch) */
	260	unsigned conn_error : 1;
	261
b6aeaded MS	262	/** Is fsync not implemented by fs? */
	263	unsigned no_fsync : 1;
	264
82547981 MS	265	/** Is fsyncdir not implemented by fs? */
	266	unsigned no_fsyncdir : 1;
	267
b6aeaded MS	268	/** Is flush not implemented by fs? */
	269	unsigned no_flush : 1;
	270
92a8780e MS	271	/** Is setxattr not implemented by fs? */
	272	unsigned no_setxattr : 1;
	273
	274	/** Is getxattr not implemented by fs? */
	275	unsigned no_getxattr : 1;
	276
	277	/** Is listxattr not implemented by fs? */
	278	unsigned no_listxattr : 1;
	279
	280	/** Is removexattr not implemented by fs? */
	281	unsigned no_removexattr : 1;
	282
31d40d74 MS	283	/** Is access not implemented by fs? */
	284	unsigned no_access : 1;
	285
fd72faac MS	286	/** Is create not implemented by fs? */
	287	unsigned no_create : 1;
	288
0cd5b885 MS	289	/** The number of requests waiting for completion */
	290	atomic_t num_waiting;
	291
45714d65 MS	292	/** Negotiated minor version */
	293	unsigned minor;
	294
d8a5ba45 MS	295	/** Backing dev info */
d8a5ba45 MS	296	struct backing_dev_info bdi;
f543f253 MS	297
	298	/** kobject */
	299	struct kobject kobj;
d8a5ba45 MS	300	};
d8a5ba45 MS	301
d8a5ba45 MS	302	static inline struct fuse_conn get_fuse_conn_super(struct super_block sb)
d8a5ba45 MS	303	{
6383bdaa	304	return sb->s_fs_info;
d8a5ba45 MS	305	}
	306
	307	static inline struct fuse_conn get_fuse_conn(struct inode inode)
	308	{
	309	return get_fuse_conn_super(inode->i_sb);
	310	}
	311
f543f253 MS	312	static inline struct fuse_conn get_fuse_conn_kobj(struct kobject obj)
	313	{
	314	return container_of(obj, struct fuse_conn, kobj);
	315	}
	316
d8a5ba45 MS	317	static inline struct fuse_inode get_fuse_inode(struct inode inode)
	318	{
	319	return container_of(inode, struct fuse_inode, inode);
	320	}
	321
	322	static inline u64 get_node_id(struct inode *inode)
	323	{
	324	return get_fuse_inode(inode)->nodeid;
	325	}
	326
334f485d MS	327	/** Device operations */
	328	extern struct file_operations fuse_dev_operations;
	329
d8a5ba45 MS	330	/**
	331	* This is the single global spinlock which protects FUSE's structures
	332	*
	333	* The following data is protected by this lock:
	334	*
334f485d	335	* - the private_data field of the device file
d8a5ba45	336	* - the s_fs_info field of the super block
334f485d	337	* - unused_list, pending, processing lists in fuse_conn
1e9a4ed9	338	* - background list in fuse_conn
334f485d	339	* - the unique request ID counter reqctr in fuse_conn
d8a5ba45	340	* - the sb (super_block) field in fuse_conn
334f485d	341	* - the file (device file) field in fuse_conn
d8a5ba45 MS	342	*/
	343	extern spinlock_t fuse_lock;
	344
e5e5558e MS	345	/**
	346	* Get a filled in inode
	347	*/
	348	struct inode fuse_iget(struct super_block sb, unsigned long nodeid,
9e6268db	349	int generation, struct fuse_attr *attr);
e5e5558e MS	350
	351	/**
	352	* Send FORGET command
	353	*/
	354	void fuse_send_forget(struct fuse_conn fc, struct fuse_req req,
9e6268db	355	unsigned long nodeid, u64 nlookup);
e5e5558e	356
04730fef	357	/**
361b1eb5	358	* Initialize READ or READDIR request
04730fef	359	*/
361b1eb5 MS	360	void fuse_read_fill(struct fuse_req req, struct file file,
361b1eb5 MS	361	struct inode *inode, loff_t pos, size_t count, int opcode);
04730fef MS	362
	363	/**
	364	* Send OPEN or OPENDIR request
	365	*/
	366	int fuse_open_common(struct inode inode, struct file file, int isdir);
	367
fd72faac MS	368	struct fuse_file *fuse_file_alloc(void);
	369	void fuse_file_free(struct fuse_file *ff);
	370	void fuse_finish_open(struct inode inode, struct file file,
	371	struct fuse_file ff, struct fuse_open_out outarg);
	372
	373	/**
	374	* Send a RELEASE request
	375	*/
	376	void fuse_send_release(struct fuse_conn fc, struct fuse_file ff,
	377	u64 nodeid, struct inode *inode, int flags, int isdir);
	378
04730fef MS	379	/**
	380	* Send RELEASE or RELEASEDIR request
	381	*/
	382	int fuse_release_common(struct inode inode, struct file file, int isdir);
	383
82547981 MS	384	/**
	385	* Send FSYNC or FSYNCDIR request
	386	*/
	387	int fuse_fsync_common(struct file file, struct dentry de, int datasync,
	388	int isdir);
	389
b6aeaded	390	/**
1779381d	391	* Initialize file operations on a regular file
b6aeaded MS	392	*/
	393	void fuse_init_file_inode(struct inode *inode);
	394
e5e5558e	395	/**
1779381d	396	* Initialize inode operations on regular files and special files
e5e5558e MS	397	*/
	398	void fuse_init_common(struct inode *inode);
	399
	400	/**
1779381d	401	* Initialize inode and file operations on a directory
e5e5558e MS	402	*/
	403	void fuse_init_dir(struct inode *inode);
	404
	405	/**
1779381d	406	* Initialize inode operations on a symlink
e5e5558e MS	407	*/
	408	void fuse_init_symlink(struct inode *inode);
	409
	410	/**
	411	* Change attributes of an inode
	412	*/
	413	void fuse_change_attributes(struct inode inode, struct fuse_attr attr);
	414
334f485d MS	415	/**
	416	* Initialize the client device
	417	*/
	418	int fuse_dev_init(void);
	419
	420	/**
	421	* Cleanup the client device
	422	*/
	423	void fuse_dev_cleanup(void);
	424
	425	/**
	426	* Allocate a request
	427	*/
	428	struct fuse_req *fuse_request_alloc(void);
	429
	430	/**
	431	* Free a request
	432	*/
	433	void fuse_request_free(struct fuse_req *req);
	434
	435	/**
	436	* Reinitialize a request, the preallocated flag is left unmodified
	437	*/
	438	void fuse_reset_request(struct fuse_req *req);
	439
	440	/**
	441	* Reserve a preallocated request
	442	*/
	443	struct fuse_req fuse_get_request(struct fuse_conn fc);
	444
334f485d MS	445	/**
334f485d MS	446	* Decrement reference count of a request. If count goes to zero put
1779381d	447	* on unused list (preallocated) or free request (not preallocated).
334f485d MS	448	*/
	449	void fuse_put_request(struct fuse_conn fc, struct fuse_req req);
	450
	451	/**
7c352bdf	452	* Send a request (synchronous)
334f485d MS	453	*/
	454	void request_send(struct fuse_conn fc, struct fuse_req req);
	455
334f485d MS	456	/**
	457	* Send a request with no reply
	458	*/
	459	void request_send_noreply(struct fuse_conn fc, struct fuse_req req);
	460
	461	/**
	462	* Send a request in the background
	463	*/
	464	void request_send_background(struct fuse_conn fc, struct fuse_req req);
	465
1e9a4ed9	466	/**
1779381d	467	* Release inodes and file associated with background request
1e9a4ed9 MS	468	*/
	469	void fuse_release_background(struct fuse_req *req);
	470
69a53bf2 MS	471	/* Abort all requests */
	472	void fuse_abort_conn(struct fuse_conn *fc);
	473
e5e5558e MS	474	/**
	475	* Get the attributes of a file
	476	*/
	477	int fuse_do_getattr(struct inode *inode);
	478
	479	/**
	480	* Invalidate inode attributes
	481	*/
	482	void fuse_invalidate_attr(struct inode *inode);