1 /*
2 FUSE: Filesystem in Userspace
3 Copyright (C) 2001-2008 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 #ifndef _FS_FUSE_I_H
10 #define _FS_FUSE_I_H
11
12 #include <linux/fuse.h>
13 #include <linux/fs.h>
14 #include <linux/mount.h>
15 #include <linux/wait.h>
16 #include <linux/list.h>
17 #include <linux/spinlock.h>
18 #include <linux/mm.h>
19 #include <linux/backing-dev.h>
20 #include <linux/mutex.h>
21 #include <linux/rwsem.h>
22 #include <linux/rbtree.h>
23 #include <linux/poll.h>
24 #include <linux/workqueue.h>
25
26 /** Max number of pages that can be used in a single read request */
27 #define FUSE_MAX_PAGES_PER_REQ 32
28
29 /** Bias for fi->writectr, meaning new writepages must not be sent */
30 #define FUSE_NOWRITE INT_MIN
31
32 /** It could be as large as PATH_MAX, but would that have any uses? */
33 #define FUSE_NAME_MAX 1024
34
35 /** Number of dentries for each connection in the control filesystem */
36 #define FUSE_CTL_NUM_DENTRIES 5
37
38 /** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
39 module will check permissions based on the file mode. Otherwise no
40 permission checking is done in the kernel */
41 #define FUSE_DEFAULT_PERMISSIONS (1 << 0)
42
43 /** If the FUSE_ALLOW_OTHER flag is given, then not only the user
44 doing the mount will be allowed to access the filesystem */
45 #define FUSE_ALLOW_OTHER (1 << 1)
46
47 /** Number of page pointers embedded in fuse_req */
48 #define FUSE_REQ_INLINE_PAGES 1
49
50 /** List of active connections */
51 extern struct list_head fuse_conn_list;
52
53 /** Global mutex protecting fuse_conn_list and the control filesystem */
54 extern struct mutex fuse_mutex;
55
56 /** Module parameters */
57 extern unsigned max_user_bgreq;
58 extern unsigned max_user_congthresh;
59
60 /* One forget request */
61 struct fuse_forget_link {
62 struct fuse_forget_one forget_one;
63 struct fuse_forget_link *next;
64 };
65
66 /** FUSE inode */
67 struct fuse_inode {
68 /** Inode data */
69 struct inode inode;
70
71 /** Unique ID, which identifies the inode between userspace
72 * and kernel */
73 u64 nodeid;
74
75 /** Number of lookups on this inode */
76 u64 nlookup;
77
78 /** The request used for sending the FORGET message */
79 struct fuse_forget_link *forget;
80
81 /** Time in jiffies until the file attributes are valid */
82 u64 i_time;
83
84 /** The sticky bit in inode->i_mode may have been removed, so
85 preserve the original mode */
86 umode_t orig_i_mode;
87
88 /** 64 bit inode number */
89 u64 orig_ino;
90
91 /** Version of last attribute change */
92 u64 attr_version;
93
94 /** Files usable in writepage. Protected by fc->lock */
95 struct list_head write_files;
96
97 /** Writepages pending on truncate or fsync */
98 struct list_head queued_writes;
99
100 /** Number of sent writes, a negative bias (FUSE_NOWRITE)
101 * means more writes are blocked */
102 int writectr;
103
104 /** Waitq for writepage completion */
105 wait_queue_head_t page_waitq;
106
107 /** List of writepage requestst (pending or sent) */
108 struct list_head writepages;
109
110 /** Miscellaneous bits describing inode state */
111 unsigned long state;
112 };
113
114 /** FUSE inode state bits */
115 enum {
116 /** Advise readdirplus */
117 FUSE_I_ADVISE_RDPLUS,
118 };
119
120 struct fuse_conn;
121
122 /** FUSE specific file data */
123 struct fuse_file {
124 /** Fuse connection for this file */
125 struct fuse_conn *fc;
126
127 /** Request reserved for flush and release */
128 struct fuse_req *reserved_req;
129
130 /** Kernel file handle guaranteed to be unique */
131 u64 kh;
132
133 /** File handle used by userspace */
134 u64 fh;
135
136 /** Node id of this file */
137 u64 nodeid;
138
139 /** Refcount */
140 atomic_t count;
141
142 /** FOPEN_* flags returned by open */
143 u32 open_flags;
144
145 /** Entry on inode's write_files list */
146 struct list_head write_entry;
147
148 /** RB node to be linked on fuse_conn->polled_files */
149 struct rb_node polled_node;
150
151 /** Wait queue head for poll */
152 wait_queue_head_t poll_wait;
153
154 /** Has flock been performed on this file? */
155 bool flock:1;
156 };
157
158 /** One input argument of a request */
159 struct fuse_in_arg {
160 unsigned size;
161 const void *value;
162 };
163
164 /** The request input */
165 struct fuse_in {
166 /** The request header */
167 struct fuse_in_header h;
168
169 /** True if the data for the last argument is in req->pages */
170 unsigned argpages:1;
171
172 /** Number of arguments */
173 unsigned numargs;
174
175 /** Array of arguments */
176 struct fuse_in_arg args[3];
177 };
178
179 /** One output argument of a request */
180 struct fuse_arg {
181 unsigned size;
182 void *value;
183 };
184
185 /** The request output */
186 struct fuse_out {
187 /** Header returned from userspace */
188 struct fuse_out_header h;
189
190 /*
191 * The following bitfields are not changed during the request
192 * processing
193 */
194
195 /** Last argument is variable length (can be shorter than
196 arg->size) */
197 unsigned argvar:1;
198
199 /** Last argument is a list of pages to copy data to */
200 unsigned argpages:1;
201
202 /** Zero partially or not copied pages */
203 unsigned page_zeroing:1;
204
205 /** Pages may be replaced with new ones */
206 unsigned page_replace:1;
207
208 /** Number or arguments */
209 unsigned numargs;
210
211 /** Array of arguments */
212 struct fuse_arg args[3];
213 };
214
215 /** FUSE page descriptor */
216 struct fuse_page_desc {
217 unsigned int length;
218 unsigned int offset;
219 };
220
221 /** The request state */
222 enum fuse_req_state {
223 FUSE_REQ_INIT = 0,
224 FUSE_REQ_PENDING,
225 FUSE_REQ_READING,
226 FUSE_REQ_SENT,
227 FUSE_REQ_WRITING,
228 FUSE_REQ_FINISHED
229 };
230
231 /** The request IO state (for asynchronous processing) */
232 struct fuse_io_priv {
233 int async;
234 spinlock_t lock;
235 unsigned reqs;
236 ssize_t bytes;
237 size_t size;
238 __u64 offset;
239 bool write;
240 int err;
241 struct kiocb *iocb;
242 struct file *file;
243 };
244
245 /**
246 * A request to the client
247 */
248 struct fuse_req {
249 /** This can be on either pending processing or io lists in
250 fuse_conn */
251 struct list_head list;
252
253 /** Entry on the interrupts list */
254 struct list_head intr_entry;
255
256 /** refcount */
257 atomic_t count;
258
259 /** Unique ID for the interrupt request */
260 u64 intr_unique;
261
262 /*
263 * The following bitfields are either set once before the
264 * request is queued or setting/clearing them is protected by
265 * fuse_conn->lock
266 */
267
268 /** True if the request has reply */
269 unsigned isreply:1;
270
271 /** Force sending of the request even if interrupted */
272 unsigned force:1;
273
274 /** The request was aborted */
275 unsigned aborted:1;
276
277 /** Request is sent in the background */
278 unsigned background:1;
279
280 /** The request has been interrupted */
281 unsigned interrupted:1;
282
283 /** Data is being copied to/from the request */
284 unsigned locked:1;
285
286 /** Request is counted as "waiting" */
287 unsigned waiting:1;
288
289 /** State of the request */
290 enum fuse_req_state state;
291
292 /** The request input */
293 struct fuse_in in;
294
295 /** The request output */
296 struct fuse_out out;
297
298 /** Used to wake up the task waiting for completion of request*/
299 wait_queue_head_t waitq;
300
301 /** Data for asynchronous requests */
302 union {
303 struct {
304 union {
305 struct fuse_release_in in;
306 struct work_struct work;
307 };
308 struct path path;
309 } release;
310 struct fuse_init_in init_in;
311 struct fuse_init_out init_out;
312 struct cuse_init_in cuse_init_in;
313 struct {
314 struct fuse_read_in in;
315 u64 attr_ver;
316 } read;
317 struct {
318 struct fuse_write_in in;
319 struct fuse_write_out out;
320 } write;
321 struct fuse_notify_retrieve_in retrieve_in;
322 struct fuse_lk_in lk_in;
323 } misc;
324
325 /** page vector */
326 struct page **pages;
327
328 /** page-descriptor vector */
329 struct fuse_page_desc *page_descs;
330
331 /** size of the 'pages' array */
332 unsigned max_pages;
333
334 /** inline page vector */
335 struct page *inline_pages[FUSE_REQ_INLINE_PAGES];
336
337 /** inline page-descriptor vector */
338 struct fuse_page_desc inline_page_descs[FUSE_REQ_INLINE_PAGES];
339
340 /** number of pages in vector */
341 unsigned num_pages;
342
343 /** File used in the request (or NULL) */
344 struct fuse_file *ff;
345
346 /** Inode used in the request or NULL */
347 struct inode *inode;
348
349 /** Path used for completing d_canonical_path */
350 struct path *canonical_path;
351
352 /** AIO control block */
353 struct fuse_io_priv *io;
354
355 /** Link on fi->writepages */
356 struct list_head writepages_entry;
357
358 /** Request completion callback */
359 void (*end)(struct fuse_conn *, struct fuse_req *);
360
361 /** Request is stolen from fuse_file->reserved_req */
362 struct file *stolen_file;
363 };
364
365 /**
366 * A Fuse connection.
367 *
368 * This structure is created, when the filesystem is mounted, and is
369 * destroyed, when the client device is closed and the filesystem is
370 * unmounted.
371 */
372 struct fuse_conn {
373 /** Lock protecting accessess to members of this structure */
374 spinlock_t lock;
375
376 /** Mutex protecting against directory alias creation */
377 struct mutex inst_mutex;
378
379 /** Refcount */
380 atomic_t count;
381
382 /** The user id for this mount */
383 kuid_t user_id;
384
385 /** The group id for this mount */
386 kgid_t group_id;
387
388 /** The fuse mount flags for this mount */
389 unsigned flags;
390
391 /** Maximum read size */
392 unsigned max_read;
393
394 /** Maximum write size */
395 unsigned max_write;
396
397 /** Readers of the connection are waiting on this */
398 wait_queue_head_t waitq;
399
400 /** The list of pending requests */
401 struct list_head pending;
402
403 /** The list of requests being processed */
404 struct list_head processing;
405
406 /** The list of requests under I/O */
407 struct list_head io;
408
409 /** The next unique kernel file handle */
410 u64 khctr;
411
412 /** rbtree of fuse_files waiting for poll events indexed by ph */
413 struct rb_root polled_files;
414
415 /** Maximum number of outstanding background requests */
416 unsigned max_background;
417
418 /** Number of background requests at which congestion starts */
419 unsigned congestion_threshold;
420
421 /** Number of requests currently in the background */
422 unsigned num_background;
423
424 /** Number of background requests currently queued for userspace */
425 unsigned active_background;
426
427 /** The list of background requests set aside for later queuing */
428 struct list_head bg_queue;
429
430 /** Pending interrupts */
431 struct list_head interrupts;
432
433 /** Queue of pending forgets */
434 struct fuse_forget_link forget_list_head;
435 struct fuse_forget_link *forget_list_tail;
436
437 /** Batching of FORGET requests (positive indicates FORGET batch) */
438 int forget_batch;
439
440 /** Flag indicating that INIT reply has been received. Allocating
441 * any fuse request will be suspended until the flag is set */
442 int initialized;
443
444 /** Flag indicating if connection is blocked. This will be
445 the case before the INIT reply is received, and if there
446 are too many outstading backgrounds requests */
447 int blocked;
448
449 /** waitq for blocked connection */
450 wait_queue_head_t blocked_waitq;
451
452 /** waitq for reserved requests */
453 wait_queue_head_t reserved_req_waitq;
454
455 /** The next unique request id */
456 u64 reqctr;
457
458 /** Connection established, cleared on umount, connection
459 abort and device release */
460 unsigned connected;
461
462 /** Connection failed (version mismatch). Cannot race with
463 setting other bitfields since it is only set once in INIT
464 reply, before any other request, and never cleared */
465 unsigned conn_error:1;
466
467 /** Connection successful. Only set in INIT */
468 unsigned conn_init:1;
469
470 /** Do readpages asynchronously? Only set in INIT */
471 unsigned async_read:1;
472
473 /** Do not send separate SETATTR request before open(O_TRUNC) */
474 unsigned atomic_o_trunc:1;
475
476 /** Filesystem supports NFS exporting. Only set in INIT */
477 unsigned export_support:1;
478
479 /** Set if bdi is valid */
480 unsigned bdi_initialized:1;
481
482 /*
483 * The following bitfields are only for optimization purposes
484 * and hence races in setting them will not cause malfunction
485 */
486
487 /** Is fsync not implemented by fs? */
488 unsigned no_fsync:1;
489
490 /** Is fsyncdir not implemented by fs? */
491 unsigned no_fsyncdir:1;
492
493 /** Is flush not implemented by fs? */
494 unsigned no_flush:1;
495
496 /** Is setxattr not implemented by fs? */
497 unsigned no_setxattr:1;
498
499 /** Is getxattr not implemented by fs? */
500 unsigned no_getxattr:1;
501
502 /** Is listxattr not implemented by fs? */
503 unsigned no_listxattr:1;
504
505 /** Is removexattr not implemented by fs? */
506 unsigned no_removexattr:1;
507
508 /** Are posix file locking primitives not implemented by fs? */
509 unsigned no_lock:1;
510
511 /** Is access not implemented by fs? */
512 unsigned no_access:1;
513
514 /** Is create not implemented by fs? */
515 unsigned no_create:1;
516
517 /** Is interrupt not implemented by fs? */
518 unsigned no_interrupt:1;
519
520 /** Is bmap not implemented by fs? */
521 unsigned no_bmap:1;
522
523 /** Is poll not implemented by fs? */
524 unsigned no_poll:1;
525
526 /** Do multi-page cached writes */
527 unsigned big_writes:1;
528
529 /** Don't apply umask to creation modes */
530 unsigned dont_mask:1;
531
532 /** Are BSD file locking primitives not implemented by fs? */
533 unsigned no_flock:1;
534
535 /** Is fallocate not implemented by fs? */
536 unsigned no_fallocate:1;
537
538 /** Use enhanced/automatic page cache invalidation. */
539 unsigned auto_inval_data:1;
540
541 /** Does the filesystem support readdirplus? */
542 unsigned do_readdirplus:1;
543
544 /** Does the filesystem want adaptive readdirplus? */
545 unsigned readdirplus_auto:1;
546
547 /** Does the filesystem support asynchronous direct-IO submission? */
548 unsigned async_dio:1;
549
550 /** The number of requests waiting for completion */
551 atomic_t num_waiting;
552
553 /** Negotiated minor version */
554 unsigned minor;
555
556 /** Backing dev info */
557 struct backing_dev_info bdi;
558
559 /** Entry on the fuse_conn_list */
560 struct list_head entry;
561
562 /** Device ID from super block */
563 dev_t dev;
564
565 /** Dentries in the control filesystem */
566 struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES];
567
568 /** number of dentries used in the above array */
569 int ctl_ndents;
570
571 /** O_ASYNC requests */
572 struct fasync_struct *fasync;
573
574 /** Key for lock owner ID scrambling */
575 u32 scramble_key[4];
576
577 /** Reserved request for the DESTROY message */
578 struct fuse_req *destroy_req;
579
580 /** Version counter for attribute changes */
581 u64 attr_version;
582
583 /** Called on final put */
584 void (*release)(struct fuse_conn *);
585
586 /** Super block for this connection. */
587 struct super_block *sb;
588
589 /** Read/write semaphore to hold when accessing sb. */
590 struct rw_semaphore killsb;
591 };
592
get_fuse_conn_super(struct super_block * sb)593 static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
594 {
595 return sb->s_fs_info;
596 }
597
get_fuse_conn(struct inode * inode)598 static inline struct fuse_conn *get_fuse_conn(struct inode *inode)
599 {
600 return get_fuse_conn_super(inode->i_sb);
601 }
602
get_fuse_inode(struct inode * inode)603 static inline struct fuse_inode *get_fuse_inode(struct inode *inode)
604 {
605 return container_of(inode, struct fuse_inode, inode);
606 }
607
get_node_id(struct inode * inode)608 static inline u64 get_node_id(struct inode *inode)
609 {
610 return get_fuse_inode(inode)->nodeid;
611 }
612
613 /** Device operations */
614 extern const struct file_operations fuse_dev_operations;
615
616 extern const struct dentry_operations fuse_dentry_operations;
617
618 /**
619 * Inode to nodeid comparison.
620 */
621 int fuse_inode_eq(struct inode *inode, void *_nodeidp);
622
623 /**
624 * Get a filled in inode
625 */
626 struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
627 int generation, struct fuse_attr *attr,
628 u64 attr_valid, u64 attr_version);
629
630 int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
631 struct fuse_entry_out *outarg, struct inode **inode);
632
633 /**
634 * Send FORGET command
635 */
636 void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,
637 u64 nodeid, u64 nlookup);
638
639 struct fuse_forget_link *fuse_alloc_forget(void);
640
641 /* Used by READDIRPLUS */
642 void fuse_force_forget(struct file *file, u64 nodeid);
643
644 /**
645 * Initialize READ or READDIR request
646 */
647 void fuse_read_fill(struct fuse_req *req, struct file *file,
648 loff_t pos, size_t count, int opcode);
649
650 /**
651 * Send OPEN or OPENDIR request
652 */
653 int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
654
655 struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
656 struct fuse_file *fuse_file_get(struct fuse_file *ff);
657 void fuse_file_free(struct fuse_file *ff);
658 void fuse_finish_open(struct inode *inode, struct file *file);
659
660 void fuse_sync_release(struct fuse_file *ff, int flags);
661
662 /**
663 * Send RELEASE or RELEASEDIR request
664 */
665 void fuse_release_common(struct file *file, int opcode);
666
667 /**
668 * Send FSYNC or FSYNCDIR request
669 */
670 int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
671 int datasync, int isdir);
672
673 /**
674 * Notify poll wakeup
675 */
676 int fuse_notify_poll_wakeup(struct fuse_conn *fc,
677 struct fuse_notify_poll_wakeup_out *outarg);
678
679 /**
680 * Initialize file operations on a regular file
681 */
682 void fuse_init_file_inode(struct inode *inode);
683
684 /**
685 * Initialize inode operations on regular files and special files
686 */
687 void fuse_init_common(struct inode *inode);
688
689 /**
690 * Initialize inode and file operations on a directory
691 */
692 void fuse_init_dir(struct inode *inode);
693
694 /**
695 * Initialize inode operations on a symlink
696 */
697 void fuse_init_symlink(struct inode *inode);
698
699 /**
700 * Change attributes of an inode
701 */
702 void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
703 u64 attr_valid, u64 attr_version);
704
705 void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
706 u64 attr_valid);
707
708 /**
709 * Initialize the client device
710 */
711 int fuse_dev_init(void);
712
713 /**
714 * Cleanup the client device
715 */
716 void fuse_dev_cleanup(void);
717
718 int fuse_ctl_init(void);
719 void fuse_ctl_cleanup(void);
720
721 /**
722 * Allocate a request
723 */
724 struct fuse_req *fuse_request_alloc(unsigned npages);
725
726 struct fuse_req *fuse_request_alloc_nofs(unsigned npages);
727
728 /**
729 * Free a request
730 */
731 void fuse_request_free(struct fuse_req *req);
732
733 /**
734 * Get a request, may fail with -ENOMEM,
735 * caller should specify # elements in req->pages[] explicitly
736 */
737 struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages);
738 struct fuse_req *fuse_get_req_for_background(struct fuse_conn *fc,
739 unsigned npages);
740
741 /*
742 * Increment reference count on request
743 */
744 void __fuse_get_request(struct fuse_req *req);
745
746 /**
747 * Get a request, may fail with -ENOMEM,
748 * useful for callers who doesn't use req->pages[]
749 */
fuse_get_req_nopages(struct fuse_conn * fc)750 static inline struct fuse_req *fuse_get_req_nopages(struct fuse_conn *fc)
751 {
752 return fuse_get_req(fc, 0);
753 }
754
755 /**
756 * Gets a requests for a file operation, always succeeds
757 */
758 struct fuse_req *fuse_get_req_nofail_nopages(struct fuse_conn *fc,
759 struct file *file);
760
761 /**
762 * Decrement reference count of a request. If count goes to zero free
763 * the request.
764 */
765 void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req);
766
767 /**
768 * Send a request (synchronous)
769 */
770 void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req);
771
772 /**
773 * Send a request in the background
774 */
775 void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req);
776
777 void fuse_request_send_background_locked(struct fuse_conn *fc,
778 struct fuse_req *req);
779
780 /* Abort all requests */
781 void fuse_abort_conn(struct fuse_conn *fc);
782
783 /**
784 * Invalidate inode attributes
785 */
786 void fuse_invalidate_attr(struct inode *inode);
787
788 void fuse_invalidate_entry_cache(struct dentry *entry);
789
790 /**
791 * Acquire reference to fuse_conn
792 */
793 struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
794
795 void fuse_conn_kill(struct fuse_conn *fc);
796
797 /**
798 * Initialize fuse_conn
799 */
800 void fuse_conn_init(struct fuse_conn *fc);
801
802 /**
803 * Release reference to fuse_conn
804 */
805 void fuse_conn_put(struct fuse_conn *fc);
806
807 /**
808 * Add connection to control filesystem
809 */
810 int fuse_ctl_add_conn(struct fuse_conn *fc);
811
812 /**
813 * Remove connection from control filesystem
814 */
815 void fuse_ctl_remove_conn(struct fuse_conn *fc);
816
817 /**
818 * Is file type valid?
819 */
820 int fuse_valid_type(int m);
821
822 /**
823 * Is current process allowed to perform filesystem operation?
824 */
825 int fuse_allow_current_process(struct fuse_conn *fc);
826
827 u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id);
828
829 int fuse_update_attributes(struct inode *inode, struct kstat *stat,
830 struct file *file, bool *refreshed);
831
832 void fuse_flush_writepages(struct inode *inode);
833
834 void fuse_set_nowrite(struct inode *inode);
835 void fuse_release_nowrite(struct inode *inode);
836
837 u64 fuse_get_attr_version(struct fuse_conn *fc);
838
839 /**
840 * File-system tells the kernel to invalidate cache for the given node id.
841 */
842 int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid,
843 loff_t offset, loff_t len);
844
845 /**
846 * File-system tells the kernel to invalidate parent attributes and
847 * the dentry matching parent/name.
848 *
849 * If the child_nodeid is non-zero and:
850 * - matches the inode number for the dentry matching parent/name,
851 * - is not a mount point
852 * - is a file or oan empty directory
853 * then the dentry is unhashed (d_delete()).
854 */
855 int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
856 u64 child_nodeid, struct qstr *name);
857
858 int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
859 bool isdir);
860 ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov,
861 unsigned long nr_segs, size_t count, loff_t *ppos,
862 int write);
863 long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
864 unsigned int flags);
865 long fuse_ioctl_common(struct file *file, unsigned int cmd,
866 unsigned long arg, unsigned int flags);
867 unsigned fuse_file_poll(struct file *file, poll_table *wait);
868 int fuse_dev_release(struct inode *inode, struct file *file);
869
870 void fuse_write_update_size(struct inode *inode, loff_t pos);
871
872 int fuse_do_setattr(struct inode *inode, struct iattr *attr,
873 struct file *file);
874
875 #endif /* _FS_FUSE_I_H */
876