[thirdparty/kernel/linux.git] / fs / fuse / fuse_i.h

/*
  FUSE: Filesystem in Userspace
  Copyright (C) 2001-2006  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

/** Maximum number of outstanding background requests */
#define FUSE_MAX_BACKGROUND 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;

	/*
	 * The following bitfields are not changed during the request
	 * processing
	 */

	/** 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 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;

	/*
	 * The following bitfields are either set once before the
	 * request is queued or setting/clearing them is protected by
	 * fuse_conn->lock
	 */

	/** True if the request has reply */
	unsigned isreply: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 {
	/** Lock protecting accessess to  members of this structure */
	spinlock_t lock;

	/** 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;

	/** Number of requests currently in the background */
	unsigned num_background;

	/** Flag indicating if connection is blocked.  This will be
	    the case before the INIT reply is received, and if there
	    are too many outstading backgrounds requests */
	int blocked;

	/** waitq for blocked connection */
	wait_queue_head_t blocked_waitq;

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

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

	/** Connection failed (version mismatch).  Cannot race with
	    setting other bitfields since it is only set once in INIT
	    reply, before any other request, and never cleared */
	unsigned conn_error : 1;

	/** Do readpages asynchronously?  Only set in INIT */
	unsigned async_read : 1;

	/*
	 * The following bitfields are only for optimization purposes
	 * and hence races in setting them will not cause malfunction
	 */

	/** 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;

	/** O_ASYNC requests */
	struct fasync_struct *fasync;
};

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 const struct file_operations fuse_dev_operations;

/**
 * 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_req(struct fuse_conn *fc);

/**
 * Decrement reference count of a request.  If count goes to zero free
 * the request.
 */
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);

/**
 * Remove request from the the background list
 */
void fuse_remove_background(struct fuse_conn *fc, 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	/*
d8a5ba45 MS	2	FUSE: Filesystem in Userspace
d7133114	3	Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
d8a5ba45 MS	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
08a53cdc MS	21	/** Maximum number of outstanding background requests */
	22	#define FUSE_MAX_BACKGROUND 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
095da6cb MS	97	/*
	98	* The following bitfields are not changed during the request
	99	* processing
	100	*/
	101
334f485d MS	102	/** Last argument is variable length (can be shorter than
	103	arg->size) */
	104	unsigned argvar:1;
	105
	106	/** Last argument is a list of pages to copy data to */
	107	unsigned argpages:1;
	108
	109	/** Zero partially or not copied pages */
	110	unsigned page_zeroing:1;
	111
	112	/** Number or arguments */
	113	unsigned numargs;
	114
	115	/** Array of arguments */
	116	struct fuse_arg args[3];
	117	};
	118
83cfd493 MS	119	/** The request state */
	120	enum fuse_req_state {
	121	FUSE_REQ_INIT = 0,
	122	FUSE_REQ_PENDING,
	123	FUSE_REQ_READING,
	124	FUSE_REQ_SENT,
	125	FUSE_REQ_FINISHED
	126	};
	127
64c6d8ed MS	128	struct fuse_conn;
64c6d8ed MS	129
334f485d MS	130	/**
	131	* A request to the client
	132	*/
	133	struct fuse_req {
ce1d5a49 MS	134	/** This can be on either pending processing or io lists in
ce1d5a49 MS	135	fuse_conn */
334f485d MS	136	struct list_head list;
334f485d MS	137
1e9a4ed9 MS	138	/** Entry on the background list */
	139	struct list_head bg_entry;
	140
334f485d MS	141	/** refcount */
	142	atomic_t count;
	143
095da6cb MS	144	/*
	145	* The following bitfields are either set once before the
	146	* request is queued or setting/clearing them is protected by
d7133114	147	* fuse_conn->lock
095da6cb MS	148	*/
095da6cb MS	149
334f485d MS	150	/** True if the request has reply */
	151	unsigned isreply:1;
	152
334f485d MS	153	/** The request was interrupted */
	154	unsigned interrupted:1;
	155
	156	/** Request is sent in the background */
	157	unsigned background:1;
	158
	159	/** Data is being copied to/from the request */
	160	unsigned locked:1;
	161
83cfd493 MS	162	/** State of the request */
83cfd493 MS	163	enum fuse_req_state state;
334f485d MS	164
	165	/** The request input */
	166	struct fuse_in in;
	167
	168	/** The request output */
	169	struct fuse_out out;
	170
	171	/** Used to wake up the task waiting for completion of request*/
	172	wait_queue_head_t waitq;
	173
	174	/** Data for asynchronous requests */
	175	union {
e5e5558e	176	struct fuse_forget_in forget_in;
b6aeaded	177	struct fuse_release_in release_in;
3ec870d5 MS	178	struct fuse_init_in init_in;
3ec870d5 MS	179	struct fuse_init_out init_out;
361b1eb5	180	struct fuse_read_in read_in;
334f485d MS	181	} misc;
	182
	183	/** page vector */
	184	struct page *pages[FUSE_MAX_PAGES_PER_REQ];
	185
	186	/** number of pages in vector */
	187	unsigned num_pages;
	188
	189	/** offset of data on first page */
	190	unsigned page_offset;
	191
	192	/** Inode used in the request */
	193	struct inode *inode;
	194
	195	/** Second inode used in the request (or NULL) */
	196	struct inode *inode2;
	197
	198	/** File used in the request (or NULL) */
	199	struct file *file;
64c6d8ed MS	200
	201	/** Request completion callback */
	202	void (end)(struct fuse_conn , struct fuse_req *);
334f485d MS	203	};
334f485d MS	204
d8a5ba45 MS	205	/**
	206	* A Fuse connection.
	207	*
	208	* This structure is created, when the filesystem is mounted, and is
	209	* destroyed, when the client device is closed and the filesystem is
	210	* unmounted.
	211	*/
	212	struct fuse_conn {
d7133114 MS	213	/** Lock protecting accessess to members of this structure */
	214	spinlock_t lock;
	215
d8a5ba45 MS	216	/** The user id for this mount */
	217	uid_t user_id;
	218
87729a55 MS	219	/** The group id for this mount */
	220	gid_t group_id;
	221
1e9a4ed9 MS	222	/** The fuse mount flags for this mount */
	223	unsigned flags;
	224
db50b96c MS	225	/** Maximum read size */
	226	unsigned max_read;
	227
413ef8cb MS	228	/** Maximum write size */
	229	unsigned max_write;
	230
334f485d MS	231	/** Readers of the connection are waiting on this */
	232	wait_queue_head_t waitq;
	233
	234	/** The list of pending requests */
	235	struct list_head pending;
	236
	237	/** The list of requests being processed */
	238	struct list_head processing;
	239
d77a1d5b MS	240	/** The list of requests under I/O */
	241	struct list_head io;
	242
1e9a4ed9 MS	243	/** Requests put in the background (RELEASE or any other
	244	interrupted request) */
	245	struct list_head background;
	246
08a53cdc MS	247	/** Number of requests currently in the background */
	248	unsigned num_background;
	249
	250	/** Flag indicating if connection is blocked. This will be
	251	the case before the INIT reply is received, and if there
	252	are too many outstading backgrounds requests */
	253	int blocked;
	254
	255	/** waitq for blocked connection */
	256	wait_queue_head_t blocked_waitq;
	257
334f485d MS	258	/** The next unique request id */
	259	u64 reqctr;
	260
69a53bf2 MS	261	/** Connection established, cleared on umount, connection
69a53bf2 MS	262	abort and device release */
095da6cb	263	unsigned connected;
1e9a4ed9	264
095da6cb MS	265	/** Connection failed (version mismatch). Cannot race with
	266	setting other bitfields since it is only set once in INIT
	267	reply, before any other request, and never cleared */
334f485d MS	268	unsigned conn_error : 1;
334f485d MS	269
9cd68455 MS	270	/** Do readpages asynchronously? Only set in INIT */
	271	unsigned async_read : 1;
	272
095da6cb MS	273	/*
	274	* The following bitfields are only for optimization purposes
	275	* and hence races in setting them will not cause malfunction
	276	*/
	277
b6aeaded MS	278	/** Is fsync not implemented by fs? */
	279	unsigned no_fsync : 1;
	280
82547981 MS	281	/** Is fsyncdir not implemented by fs? */
	282	unsigned no_fsyncdir : 1;
	283
b6aeaded MS	284	/** Is flush not implemented by fs? */
	285	unsigned no_flush : 1;
	286
92a8780e MS	287	/** Is setxattr not implemented by fs? */
	288	unsigned no_setxattr : 1;
	289
	290	/** Is getxattr not implemented by fs? */
	291	unsigned no_getxattr : 1;
	292
	293	/** Is listxattr not implemented by fs? */
	294	unsigned no_listxattr : 1;
	295
	296	/** Is removexattr not implemented by fs? */
	297	unsigned no_removexattr : 1;
	298
31d40d74 MS	299	/** Is access not implemented by fs? */
	300	unsigned no_access : 1;
	301
fd72faac MS	302	/** Is create not implemented by fs? */
	303	unsigned no_create : 1;
	304
0cd5b885 MS	305	/** The number of requests waiting for completion */
	306	atomic_t num_waiting;
	307
45714d65 MS	308	/** Negotiated minor version */
	309	unsigned minor;
	310
d8a5ba45 MS	311	/** Backing dev info */
d8a5ba45 MS	312	struct backing_dev_info bdi;
f543f253 MS	313
	314	/** kobject */
	315	struct kobject kobj;
385a17bf JD	316
	317	/** O_ASYNC requests */
	318	struct fasync_struct *fasync;
d8a5ba45 MS	319	};
d8a5ba45 MS	320
d8a5ba45 MS	321	static inline struct fuse_conn get_fuse_conn_super(struct super_block sb)
d8a5ba45 MS	322	{
6383bdaa	323	return sb->s_fs_info;
d8a5ba45 MS	324	}
	325
	326	static inline struct fuse_conn get_fuse_conn(struct inode inode)
	327	{
	328	return get_fuse_conn_super(inode->i_sb);
	329	}
	330
f543f253 MS	331	static inline struct fuse_conn get_fuse_conn_kobj(struct kobject obj)
	332	{
	333	return container_of(obj, struct fuse_conn, kobj);
	334	}
	335
d8a5ba45 MS	336	static inline struct fuse_inode get_fuse_inode(struct inode inode)
	337	{
	338	return container_of(inode, struct fuse_inode, inode);
	339	}
	340
	341	static inline u64 get_node_id(struct inode *inode)
	342	{
	343	return get_fuse_inode(inode)->nodeid;
	344	}
	345
334f485d	346	/** Device operations */
4b6f5d20	347	extern const struct file_operations fuse_dev_operations;
334f485d	348
e5e5558e MS	349	/**
	350	* Get a filled in inode
	351	*/
	352	struct inode fuse_iget(struct super_block sb, unsigned long nodeid,
9e6268db	353	int generation, struct fuse_attr *attr);
e5e5558e MS	354
	355	/**
	356	* Send FORGET command
	357	*/
	358	void fuse_send_forget(struct fuse_conn fc, struct fuse_req req,
9e6268db	359	unsigned long nodeid, u64 nlookup);
e5e5558e	360
04730fef	361	/**
361b1eb5	362	* Initialize READ or READDIR request
04730fef	363	*/
361b1eb5 MS	364	void fuse_read_fill(struct fuse_req req, struct file file,
361b1eb5 MS	365	struct inode *inode, loff_t pos, size_t count, int opcode);
04730fef MS	366
	367	/**
	368	* Send OPEN or OPENDIR request
	369	*/
	370	int fuse_open_common(struct inode inode, struct file file, int isdir);
	371
fd72faac MS	372	struct fuse_file *fuse_file_alloc(void);
	373	void fuse_file_free(struct fuse_file *ff);
	374	void fuse_finish_open(struct inode inode, struct file file,
	375	struct fuse_file ff, struct fuse_open_out outarg);
	376
	377	/**
	378	* Send a RELEASE request
	379	*/
	380	void fuse_send_release(struct fuse_conn fc, struct fuse_file ff,
	381	u64 nodeid, struct inode *inode, int flags, int isdir);
	382
04730fef MS	383	/**
	384	* Send RELEASE or RELEASEDIR request
	385	*/
	386	int fuse_release_common(struct inode inode, struct file file, int isdir);
	387
82547981 MS	388	/**
	389	* Send FSYNC or FSYNCDIR request
	390	*/
	391	int fuse_fsync_common(struct file file, struct dentry de, int datasync,
	392	int isdir);
	393
b6aeaded	394	/**
1779381d	395	* Initialize file operations on a regular file
b6aeaded MS	396	*/
	397	void fuse_init_file_inode(struct inode *inode);
	398
e5e5558e	399	/**
1779381d	400	* Initialize inode operations on regular files and special files
e5e5558e MS	401	*/
	402	void fuse_init_common(struct inode *inode);
	403
	404	/**
1779381d	405	* Initialize inode and file operations on a directory
e5e5558e MS	406	*/
	407	void fuse_init_dir(struct inode *inode);
	408
	409	/**
1779381d	410	* Initialize inode operations on a symlink
e5e5558e MS	411	*/
	412	void fuse_init_symlink(struct inode *inode);
	413
	414	/**
	415	* Change attributes of an inode
	416	*/
	417	void fuse_change_attributes(struct inode inode, struct fuse_attr attr);
	418
334f485d MS	419	/**
	420	* Initialize the client device
	421	*/
	422	int fuse_dev_init(void);
	423
	424	/**
	425	* Cleanup the client device
	426	*/
	427	void fuse_dev_cleanup(void);
	428
	429	/**
	430	* Allocate a request
	431	*/
	432	struct fuse_req *fuse_request_alloc(void);
	433
	434	/**
	435	* Free a request
	436	*/
	437	void fuse_request_free(struct fuse_req *req);
	438
	439	/**
	440	* Reinitialize a request, the preallocated flag is left unmodified
	441	*/
	442	void fuse_reset_request(struct fuse_req *req);
	443
	444	/**
	445	* Reserve a preallocated request
	446	*/
ce1d5a49	447	struct fuse_req fuse_get_req(struct fuse_conn fc);
334f485d	448
334f485d	449	/**
ce1d5a49 MS	450	* Decrement reference count of a request. If count goes to zero free
ce1d5a49 MS	451	* the request.
334f485d MS	452	*/
	453	void fuse_put_request(struct fuse_conn fc, struct fuse_req req);
	454
	455	/**
7c352bdf	456	* Send a request (synchronous)
334f485d MS	457	*/
	458	void request_send(struct fuse_conn fc, struct fuse_req req);
	459
334f485d MS	460	/**
	461	* Send a request with no reply
	462	*/
	463	void request_send_noreply(struct fuse_conn fc, struct fuse_req req);
	464
	465	/**
	466	* Send a request in the background
	467	*/
	468	void request_send_background(struct fuse_conn fc, struct fuse_req req);
	469
1e9a4ed9	470	/**
73ce8355	471	* Remove request from the the background list
1e9a4ed9	472	*/
73ce8355	473	void fuse_remove_background(struct fuse_conn fc, struct fuse_req req);
1e9a4ed9	474
73ce8355	475	/** Abort all requests */
69a53bf2 MS	476	void fuse_abort_conn(struct fuse_conn *fc);
69a53bf2 MS	477
e5e5558e MS	478	/**
	479	* Get the attributes of a file
	480	*/
	481	int fuse_do_getattr(struct inode *inode);
	482
	483	/**
	484	* Invalidate inode attributes
	485	*/
	486	void fuse_invalidate_attr(struct inode *inode);