Commit | Line | Data |
---|---|---|
d8a5ba45 MS |
1 | /* |
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> | |
51eb01e7 | 11 | #include <linux/mount.h> |
d8a5ba45 MS |
12 | #include <linux/wait.h> |
13 | #include <linux/list.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/backing-dev.h> | |
bafa9654 | 17 | #include <linux/mutex.h> |
3be5a52b | 18 | #include <linux/rwsem.h> |
d8a5ba45 | 19 | |
334f485d MS |
20 | /** Max number of pages that can be used in a single read request */ |
21 | #define FUSE_MAX_PAGES_PER_REQ 32 | |
22 | ||
08a53cdc | 23 | /** Maximum number of outstanding background requests */ |
f92b99b9 MS |
24 | #define FUSE_MAX_BACKGROUND 12 |
25 | ||
26 | /** Congestion starts at 75% of maximum */ | |
27 | #define FUSE_CONGESTION_THRESHOLD (FUSE_MAX_BACKGROUND * 75 / 100) | |
08a53cdc | 28 | |
3be5a52b MS |
29 | /** Bias for fi->writectr, meaning new writepages must not be sent */ |
30 | #define FUSE_NOWRITE INT_MIN | |
31 | ||
1d3d752b MS |
32 | /** It could be as large as PATH_MAX, but would that have any uses? */ |
33 | #define FUSE_NAME_MAX 1024 | |
34 | ||
bafa9654 MS |
35 | /** Number of dentries for each connection in the control filesystem */ |
36 | #define FUSE_CTL_NUM_DENTRIES 3 | |
37 | ||
1e9a4ed9 MS |
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 | ||
bafa9654 MS |
47 | /** List of active connections */ |
48 | extern struct list_head fuse_conn_list; | |
49 | ||
50 | /** Global mutex protecting fuse_conn_list and the control filesystem */ | |
51 | extern struct mutex fuse_mutex; | |
413ef8cb | 52 | |
d8a5ba45 MS |
53 | /** FUSE inode */ |
54 | struct fuse_inode { | |
55 | /** Inode data */ | |
56 | struct inode inode; | |
57 | ||
58 | /** Unique ID, which identifies the inode between userspace | |
59 | * and kernel */ | |
60 | u64 nodeid; | |
61 | ||
9e6268db MS |
62 | /** Number of lookups on this inode */ |
63 | u64 nlookup; | |
64 | ||
e5e5558e MS |
65 | /** The request used for sending the FORGET message */ |
66 | struct fuse_req *forget_req; | |
67 | ||
d8a5ba45 | 68 | /** Time in jiffies until the file attributes are valid */ |
0a0898cf | 69 | u64 i_time; |
ebc14c4d MS |
70 | |
71 | /** The sticky bit in inode->i_mode may have been removed, so | |
72 | preserve the original mode */ | |
73 | mode_t orig_i_mode; | |
1fb69e78 MS |
74 | |
75 | /** Version of last attribute change */ | |
76 | u64 attr_version; | |
93a8c3cd MS |
77 | |
78 | /** Files usable in writepage. Protected by fc->lock */ | |
79 | struct list_head write_files; | |
3be5a52b MS |
80 | |
81 | /** Writepages pending on truncate or fsync */ | |
82 | struct list_head queued_writes; | |
83 | ||
84 | /** Number of sent writes, a negative bias (FUSE_NOWRITE) | |
85 | * means more writes are blocked */ | |
86 | int writectr; | |
87 | ||
88 | /** Waitq for writepage completion */ | |
89 | wait_queue_head_t page_waitq; | |
90 | ||
91 | /** List of writepage requestst (pending or sent) */ | |
92 | struct list_head writepages; | |
d8a5ba45 MS |
93 | }; |
94 | ||
b6aeaded MS |
95 | /** FUSE specific file data */ |
96 | struct fuse_file { | |
97 | /** Request reserved for flush and release */ | |
33649c91 | 98 | struct fuse_req *reserved_req; |
b6aeaded MS |
99 | |
100 | /** File handle used by userspace */ | |
101 | u64 fh; | |
c756e0a4 MS |
102 | |
103 | /** Refcount */ | |
104 | atomic_t count; | |
93a8c3cd MS |
105 | |
106 | /** Entry on inode's write_files list */ | |
107 | struct list_head write_entry; | |
b6aeaded MS |
108 | }; |
109 | ||
334f485d MS |
110 | /** One input argument of a request */ |
111 | struct fuse_in_arg { | |
112 | unsigned size; | |
113 | const void *value; | |
114 | }; | |
115 | ||
116 | /** The request input */ | |
117 | struct fuse_in { | |
118 | /** The request header */ | |
119 | struct fuse_in_header h; | |
120 | ||
121 | /** True if the data for the last argument is in req->pages */ | |
122 | unsigned argpages:1; | |
123 | ||
124 | /** Number of arguments */ | |
125 | unsigned numargs; | |
126 | ||
127 | /** Array of arguments */ | |
128 | struct fuse_in_arg args[3]; | |
129 | }; | |
130 | ||
131 | /** One output argument of a request */ | |
132 | struct fuse_arg { | |
133 | unsigned size; | |
134 | void *value; | |
135 | }; | |
136 | ||
137 | /** The request output */ | |
138 | struct fuse_out { | |
139 | /** Header returned from userspace */ | |
140 | struct fuse_out_header h; | |
141 | ||
095da6cb MS |
142 | /* |
143 | * The following bitfields are not changed during the request | |
144 | * processing | |
145 | */ | |
146 | ||
334f485d MS |
147 | /** Last argument is variable length (can be shorter than |
148 | arg->size) */ | |
149 | unsigned argvar:1; | |
150 | ||
151 | /** Last argument is a list of pages to copy data to */ | |
152 | unsigned argpages:1; | |
153 | ||
154 | /** Zero partially or not copied pages */ | |
155 | unsigned page_zeroing:1; | |
156 | ||
157 | /** Number or arguments */ | |
158 | unsigned numargs; | |
159 | ||
160 | /** Array of arguments */ | |
161 | struct fuse_arg args[3]; | |
162 | }; | |
163 | ||
83cfd493 MS |
164 | /** The request state */ |
165 | enum fuse_req_state { | |
166 | FUSE_REQ_INIT = 0, | |
167 | FUSE_REQ_PENDING, | |
168 | FUSE_REQ_READING, | |
169 | FUSE_REQ_SENT, | |
a4d27e75 | 170 | FUSE_REQ_WRITING, |
83cfd493 MS |
171 | FUSE_REQ_FINISHED |
172 | }; | |
173 | ||
64c6d8ed MS |
174 | struct fuse_conn; |
175 | ||
334f485d MS |
176 | /** |
177 | * A request to the client | |
178 | */ | |
179 | struct fuse_req { | |
ce1d5a49 MS |
180 | /** This can be on either pending processing or io lists in |
181 | fuse_conn */ | |
334f485d MS |
182 | struct list_head list; |
183 | ||
a4d27e75 MS |
184 | /** Entry on the interrupts list */ |
185 | struct list_head intr_entry; | |
186 | ||
334f485d MS |
187 | /** refcount */ |
188 | atomic_t count; | |
189 | ||
a4d27e75 MS |
190 | /** Unique ID for the interrupt request */ |
191 | u64 intr_unique; | |
192 | ||
095da6cb MS |
193 | /* |
194 | * The following bitfields are either set once before the | |
195 | * request is queued or setting/clearing them is protected by | |
d7133114 | 196 | * fuse_conn->lock |
095da6cb MS |
197 | */ |
198 | ||
334f485d MS |
199 | /** True if the request has reply */ |
200 | unsigned isreply:1; | |
201 | ||
51eb01e7 MS |
202 | /** Force sending of the request even if interrupted */ |
203 | unsigned force:1; | |
204 | ||
f9a2842e MS |
205 | /** The request was aborted */ |
206 | unsigned aborted:1; | |
334f485d MS |
207 | |
208 | /** Request is sent in the background */ | |
209 | unsigned background:1; | |
210 | ||
a4d27e75 MS |
211 | /** The request has been interrupted */ |
212 | unsigned interrupted:1; | |
213 | ||
334f485d MS |
214 | /** Data is being copied to/from the request */ |
215 | unsigned locked:1; | |
216 | ||
9bc5ddda MS |
217 | /** Request is counted as "waiting" */ |
218 | unsigned waiting:1; | |
219 | ||
83cfd493 MS |
220 | /** State of the request */ |
221 | enum fuse_req_state state; | |
334f485d MS |
222 | |
223 | /** The request input */ | |
224 | struct fuse_in in; | |
225 | ||
226 | /** The request output */ | |
227 | struct fuse_out out; | |
228 | ||
229 | /** Used to wake up the task waiting for completion of request*/ | |
230 | wait_queue_head_t waitq; | |
231 | ||
232 | /** Data for asynchronous requests */ | |
233 | union { | |
e5e5558e | 234 | struct fuse_forget_in forget_in; |
b57d4264 MS |
235 | struct { |
236 | struct fuse_release_in in; | |
237 | struct vfsmount *vfsmount; | |
238 | struct dentry *dentry; | |
239 | } release; | |
3ec870d5 MS |
240 | struct fuse_init_in init_in; |
241 | struct fuse_init_out init_out; | |
5c5c5e51 MS |
242 | struct { |
243 | struct fuse_read_in in; | |
244 | u64 attr_ver; | |
245 | } read; | |
b25e82e5 MS |
246 | struct { |
247 | struct fuse_write_in in; | |
248 | struct fuse_write_out out; | |
249 | } write; | |
71421259 | 250 | struct fuse_lk_in lk_in; |
334f485d MS |
251 | } misc; |
252 | ||
253 | /** page vector */ | |
254 | struct page *pages[FUSE_MAX_PAGES_PER_REQ]; | |
255 | ||
256 | /** number of pages in vector */ | |
257 | unsigned num_pages; | |
258 | ||
259 | /** offset of data on first page */ | |
260 | unsigned page_offset; | |
261 | ||
334f485d | 262 | /** File used in the request (or NULL) */ |
c756e0a4 | 263 | struct fuse_file *ff; |
64c6d8ed | 264 | |
3be5a52b MS |
265 | /** Inode used in the request or NULL */ |
266 | struct inode *inode; | |
267 | ||
268 | /** Link on fi->writepages */ | |
269 | struct list_head writepages_entry; | |
270 | ||
64c6d8ed MS |
271 | /** Request completion callback */ |
272 | void (*end)(struct fuse_conn *, struct fuse_req *); | |
33649c91 MS |
273 | |
274 | /** Request is stolen from fuse_file->reserved_req */ | |
275 | struct file *stolen_file; | |
334f485d MS |
276 | }; |
277 | ||
d8a5ba45 MS |
278 | /** |
279 | * A Fuse connection. | |
280 | * | |
281 | * This structure is created, when the filesystem is mounted, and is | |
282 | * destroyed, when the client device is closed and the filesystem is | |
283 | * unmounted. | |
284 | */ | |
285 | struct fuse_conn { | |
d7133114 MS |
286 | /** Lock protecting accessess to members of this structure */ |
287 | spinlock_t lock; | |
288 | ||
d2a85164 MS |
289 | /** Mutex protecting against directory alias creation */ |
290 | struct mutex inst_mutex; | |
291 | ||
bafa9654 MS |
292 | /** Refcount */ |
293 | atomic_t count; | |
294 | ||
d8a5ba45 MS |
295 | /** The user id for this mount */ |
296 | uid_t user_id; | |
297 | ||
87729a55 MS |
298 | /** The group id for this mount */ |
299 | gid_t group_id; | |
300 | ||
1e9a4ed9 MS |
301 | /** The fuse mount flags for this mount */ |
302 | unsigned flags; | |
303 | ||
db50b96c MS |
304 | /** Maximum read size */ |
305 | unsigned max_read; | |
306 | ||
413ef8cb MS |
307 | /** Maximum write size */ |
308 | unsigned max_write; | |
309 | ||
334f485d MS |
310 | /** Readers of the connection are waiting on this */ |
311 | wait_queue_head_t waitq; | |
312 | ||
313 | /** The list of pending requests */ | |
314 | struct list_head pending; | |
315 | ||
316 | /** The list of requests being processed */ | |
317 | struct list_head processing; | |
318 | ||
d77a1d5b MS |
319 | /** The list of requests under I/O */ |
320 | struct list_head io; | |
321 | ||
08a53cdc MS |
322 | /** Number of requests currently in the background */ |
323 | unsigned num_background; | |
324 | ||
d12def1b MS |
325 | /** Number of background requests currently queued for userspace */ |
326 | unsigned active_background; | |
327 | ||
328 | /** The list of background requests set aside for later queuing */ | |
329 | struct list_head bg_queue; | |
330 | ||
a4d27e75 MS |
331 | /** Pending interrupts */ |
332 | struct list_head interrupts; | |
333 | ||
08a53cdc MS |
334 | /** Flag indicating if connection is blocked. This will be |
335 | the case before the INIT reply is received, and if there | |
336 | are too many outstading backgrounds requests */ | |
337 | int blocked; | |
338 | ||
339 | /** waitq for blocked connection */ | |
340 | wait_queue_head_t blocked_waitq; | |
de5e3dec MS |
341 | |
342 | /** waitq for reserved requests */ | |
343 | wait_queue_head_t reserved_req_waitq; | |
08a53cdc | 344 | |
334f485d MS |
345 | /** The next unique request id */ |
346 | u64 reqctr; | |
347 | ||
69a53bf2 MS |
348 | /** Connection established, cleared on umount, connection |
349 | abort and device release */ | |
095da6cb | 350 | unsigned connected; |
1e9a4ed9 | 351 | |
095da6cb MS |
352 | /** Connection failed (version mismatch). Cannot race with |
353 | setting other bitfields since it is only set once in INIT | |
354 | reply, before any other request, and never cleared */ | |
334f485d MS |
355 | unsigned conn_error : 1; |
356 | ||
0ec7ca41 MS |
357 | /** Connection successful. Only set in INIT */ |
358 | unsigned conn_init : 1; | |
359 | ||
9cd68455 MS |
360 | /** Do readpages asynchronously? Only set in INIT */ |
361 | unsigned async_read : 1; | |
362 | ||
6ff958ed MS |
363 | /** Do not send separate SETATTR request before open(O_TRUNC) */ |
364 | unsigned atomic_o_trunc : 1; | |
365 | ||
095da6cb MS |
366 | /* |
367 | * The following bitfields are only for optimization purposes | |
368 | * and hence races in setting them will not cause malfunction | |
369 | */ | |
370 | ||
b6aeaded MS |
371 | /** Is fsync not implemented by fs? */ |
372 | unsigned no_fsync : 1; | |
373 | ||
82547981 MS |
374 | /** Is fsyncdir not implemented by fs? */ |
375 | unsigned no_fsyncdir : 1; | |
376 | ||
b6aeaded MS |
377 | /** Is flush not implemented by fs? */ |
378 | unsigned no_flush : 1; | |
379 | ||
92a8780e MS |
380 | /** Is setxattr not implemented by fs? */ |
381 | unsigned no_setxattr : 1; | |
382 | ||
383 | /** Is getxattr not implemented by fs? */ | |
384 | unsigned no_getxattr : 1; | |
385 | ||
386 | /** Is listxattr not implemented by fs? */ | |
387 | unsigned no_listxattr : 1; | |
388 | ||
389 | /** Is removexattr not implemented by fs? */ | |
390 | unsigned no_removexattr : 1; | |
391 | ||
71421259 MS |
392 | /** Are file locking primitives not implemented by fs? */ |
393 | unsigned no_lock : 1; | |
394 | ||
31d40d74 MS |
395 | /** Is access not implemented by fs? */ |
396 | unsigned no_access : 1; | |
397 | ||
fd72faac MS |
398 | /** Is create not implemented by fs? */ |
399 | unsigned no_create : 1; | |
400 | ||
a4d27e75 MS |
401 | /** Is interrupt not implemented by fs? */ |
402 | unsigned no_interrupt : 1; | |
403 | ||
b2d2272f MS |
404 | /** Is bmap not implemented by fs? */ |
405 | unsigned no_bmap : 1; | |
406 | ||
0cd5b885 MS |
407 | /** The number of requests waiting for completion */ |
408 | atomic_t num_waiting; | |
409 | ||
45714d65 MS |
410 | /** Negotiated minor version */ |
411 | unsigned minor; | |
412 | ||
d8a5ba45 MS |
413 | /** Backing dev info */ |
414 | struct backing_dev_info bdi; | |
f543f253 | 415 | |
bafa9654 MS |
416 | /** Entry on the fuse_conn_list */ |
417 | struct list_head entry; | |
418 | ||
b6f2fcbc MS |
419 | /** Device ID from super block */ |
420 | dev_t dev; | |
bafa9654 MS |
421 | |
422 | /** Dentries in the control filesystem */ | |
423 | struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; | |
424 | ||
425 | /** number of dentries used in the above array */ | |
426 | int ctl_ndents; | |
385a17bf JD |
427 | |
428 | /** O_ASYNC requests */ | |
429 | struct fasync_struct *fasync; | |
9c8ef561 MS |
430 | |
431 | /** Key for lock owner ID scrambling */ | |
432 | u32 scramble_key[4]; | |
0ec7ca41 MS |
433 | |
434 | /** Reserved request for the DESTROY message */ | |
435 | struct fuse_req *destroy_req; | |
1fb69e78 MS |
436 | |
437 | /** Version counter for attribute changes */ | |
438 | u64 attr_version; | |
d8a5ba45 MS |
439 | }; |
440 | ||
d8a5ba45 MS |
441 | static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) |
442 | { | |
6383bdaa | 443 | return sb->s_fs_info; |
d8a5ba45 MS |
444 | } |
445 | ||
446 | static inline struct fuse_conn *get_fuse_conn(struct inode *inode) | |
447 | { | |
448 | return get_fuse_conn_super(inode->i_sb); | |
449 | } | |
450 | ||
451 | static inline struct fuse_inode *get_fuse_inode(struct inode *inode) | |
452 | { | |
453 | return container_of(inode, struct fuse_inode, inode); | |
454 | } | |
455 | ||
456 | static inline u64 get_node_id(struct inode *inode) | |
457 | { | |
458 | return get_fuse_inode(inode)->nodeid; | |
459 | } | |
460 | ||
334f485d | 461 | /** Device operations */ |
4b6f5d20 | 462 | extern const struct file_operations fuse_dev_operations; |
334f485d | 463 | |
e5e5558e MS |
464 | /** |
465 | * Get a filled in inode | |
466 | */ | |
b48badf0 | 467 | struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
1fb69e78 MS |
468 | int generation, struct fuse_attr *attr, |
469 | u64 attr_valid, u64 attr_version); | |
e5e5558e MS |
470 | |
471 | /** | |
472 | * Send FORGET command | |
473 | */ | |
474 | void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, | |
b48badf0 | 475 | u64 nodeid, u64 nlookup); |
e5e5558e | 476 | |
04730fef | 477 | /** |
361b1eb5 | 478 | * Initialize READ or READDIR request |
04730fef | 479 | */ |
a6643094 | 480 | void fuse_read_fill(struct fuse_req *req, struct file *file, |
361b1eb5 | 481 | struct inode *inode, loff_t pos, size_t count, int opcode); |
04730fef MS |
482 | |
483 | /** | |
484 | * Send OPEN or OPENDIR request | |
485 | */ | |
486 | int fuse_open_common(struct inode *inode, struct file *file, int isdir); | |
487 | ||
fd72faac MS |
488 | struct fuse_file *fuse_file_alloc(void); |
489 | void fuse_file_free(struct fuse_file *ff); | |
490 | void fuse_finish_open(struct inode *inode, struct file *file, | |
491 | struct fuse_file *ff, struct fuse_open_out *outarg); | |
492 | ||
c756e0a4 MS |
493 | /** Fill in ff->reserved_req with a RELEASE request */ |
494 | void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode); | |
495 | ||
04730fef MS |
496 | /** |
497 | * Send RELEASE or RELEASEDIR request | |
498 | */ | |
499 | int fuse_release_common(struct inode *inode, struct file *file, int isdir); | |
500 | ||
82547981 MS |
501 | /** |
502 | * Send FSYNC or FSYNCDIR request | |
503 | */ | |
504 | int fuse_fsync_common(struct file *file, struct dentry *de, int datasync, | |
505 | int isdir); | |
506 | ||
b6aeaded | 507 | /** |
1779381d | 508 | * Initialize file operations on a regular file |
b6aeaded MS |
509 | */ |
510 | void fuse_init_file_inode(struct inode *inode); | |
511 | ||
e5e5558e | 512 | /** |
1779381d | 513 | * Initialize inode operations on regular files and special files |
e5e5558e MS |
514 | */ |
515 | void fuse_init_common(struct inode *inode); | |
516 | ||
517 | /** | |
1779381d | 518 | * Initialize inode and file operations on a directory |
e5e5558e MS |
519 | */ |
520 | void fuse_init_dir(struct inode *inode); | |
521 | ||
522 | /** | |
1779381d | 523 | * Initialize inode operations on a symlink |
e5e5558e MS |
524 | */ |
525 | void fuse_init_symlink(struct inode *inode); | |
526 | ||
527 | /** | |
528 | * Change attributes of an inode | |
529 | */ | |
1fb69e78 MS |
530 | void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |
531 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 532 | |
3be5a52b MS |
533 | void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, |
534 | u64 attr_valid); | |
535 | ||
536 | void fuse_truncate(struct address_space *mapping, loff_t offset); | |
537 | ||
334f485d MS |
538 | /** |
539 | * Initialize the client device | |
540 | */ | |
541 | int fuse_dev_init(void); | |
542 | ||
543 | /** | |
544 | * Cleanup the client device | |
545 | */ | |
546 | void fuse_dev_cleanup(void); | |
547 | ||
bafa9654 MS |
548 | int fuse_ctl_init(void); |
549 | void fuse_ctl_cleanup(void); | |
550 | ||
334f485d MS |
551 | /** |
552 | * Allocate a request | |
553 | */ | |
554 | struct fuse_req *fuse_request_alloc(void); | |
555 | ||
3be5a52b MS |
556 | struct fuse_req *fuse_request_alloc_nofs(void); |
557 | ||
334f485d MS |
558 | /** |
559 | * Free a request | |
560 | */ | |
561 | void fuse_request_free(struct fuse_req *req); | |
562 | ||
334f485d | 563 | /** |
33649c91 | 564 | * Get a request, may fail with -ENOMEM |
334f485d | 565 | */ |
ce1d5a49 | 566 | struct fuse_req *fuse_get_req(struct fuse_conn *fc); |
334f485d | 567 | |
33649c91 MS |
568 | /** |
569 | * Gets a requests for a file operation, always succeeds | |
570 | */ | |
571 | struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file); | |
572 | ||
334f485d | 573 | /** |
ce1d5a49 MS |
574 | * Decrement reference count of a request. If count goes to zero free |
575 | * the request. | |
334f485d MS |
576 | */ |
577 | void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); | |
578 | ||
579 | /** | |
7c352bdf | 580 | * Send a request (synchronous) |
334f485d MS |
581 | */ |
582 | void request_send(struct fuse_conn *fc, struct fuse_req *req); | |
583 | ||
334f485d MS |
584 | /** |
585 | * Send a request with no reply | |
586 | */ | |
587 | void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req); | |
588 | ||
589 | /** | |
590 | * Send a request in the background | |
591 | */ | |
592 | void request_send_background(struct fuse_conn *fc, struct fuse_req *req); | |
593 | ||
3be5a52b MS |
594 | void request_send_background_locked(struct fuse_conn *fc, struct fuse_req *req); |
595 | ||
5a5fb1ea | 596 | /* Abort all requests */ |
69a53bf2 MS |
597 | void fuse_abort_conn(struct fuse_conn *fc); |
598 | ||
e5e5558e MS |
599 | /** |
600 | * Invalidate inode attributes | |
601 | */ | |
602 | void fuse_invalidate_attr(struct inode *inode); | |
bafa9654 MS |
603 | |
604 | /** | |
605 | * Acquire reference to fuse_conn | |
606 | */ | |
607 | struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); | |
608 | ||
609 | /** | |
610 | * Release reference to fuse_conn | |
611 | */ | |
612 | void fuse_conn_put(struct fuse_conn *fc); | |
613 | ||
614 | /** | |
615 | * Add connection to control filesystem | |
616 | */ | |
617 | int fuse_ctl_add_conn(struct fuse_conn *fc); | |
618 | ||
619 | /** | |
620 | * Remove connection from control filesystem | |
621 | */ | |
622 | void fuse_ctl_remove_conn(struct fuse_conn *fc); | |
a5bfffac TS |
623 | |
624 | /** | |
625 | * Is file type valid? | |
626 | */ | |
627 | int fuse_valid_type(int m); | |
e57ac683 MS |
628 | |
629 | /** | |
630 | * Is task allowed to perform filesystem operation? | |
631 | */ | |
632 | int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); | |
f3332114 MS |
633 | |
634 | u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); | |
bcb4be80 MS |
635 | |
636 | int fuse_update_attributes(struct inode *inode, struct kstat *stat, | |
637 | struct file *file, bool *refreshed); | |
3be5a52b MS |
638 | |
639 | void fuse_flush_writepages(struct inode *inode); | |
640 | ||
641 | void fuse_set_nowrite(struct inode *inode); | |
642 | void fuse_release_nowrite(struct inode *inode); | |
5c5c5e51 MS |
643 | |
644 | u64 fuse_get_attr_version(struct fuse_conn *fc); |