Commit | Line | Data |
---|---|---|
d8a5ba45 MS |
1 | /* |
2 | FUSE: Filesystem in Userspace | |
1729a16c | 3 | Copyright (C) 2001-2008 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 | ||
29d434b3 TH |
9 | #ifndef _FS_FUSE_I_H |
10 | #define _FS_FUSE_I_H | |
11 | ||
d8a5ba45 MS |
12 | #include <linux/fuse.h> |
13 | #include <linux/fs.h> | |
51eb01e7 | 14 | #include <linux/mount.h> |
d8a5ba45 MS |
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> | |
bafa9654 | 20 | #include <linux/mutex.h> |
3be5a52b | 21 | #include <linux/rwsem.h> |
95668a69 TH |
22 | #include <linux/rbtree.h> |
23 | #include <linux/poll.h> | |
5a18ec17 | 24 | #include <linux/workqueue.h> |
d8a5ba45 | 25 | |
334f485d MS |
26 | /** Max number of pages that can be used in a single read request */ |
27 | #define FUSE_MAX_PAGES_PER_REQ 32 | |
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 | 35 | /** Number of dentries for each connection in the control filesystem */ |
79a9d994 | 36 | #define FUSE_CTL_NUM_DENTRIES 5 |
bafa9654 | 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 | |
79a9d994 CH |
53 | /** Module parameters */ |
54 | extern unsigned max_user_bgreq; | |
55 | extern unsigned max_user_congthresh; | |
56 | ||
07e77dca MS |
57 | /* One forget request */ |
58 | struct fuse_forget_link { | |
02c048b9 | 59 | struct fuse_forget_one forget_one; |
07e77dca MS |
60 | struct fuse_forget_link *next; |
61 | }; | |
62 | ||
d8a5ba45 MS |
63 | /** FUSE inode */ |
64 | struct fuse_inode { | |
65 | /** Inode data */ | |
66 | struct inode inode; | |
67 | ||
68 | /** Unique ID, which identifies the inode between userspace | |
69 | * and kernel */ | |
70 | u64 nodeid; | |
71 | ||
9e6268db MS |
72 | /** Number of lookups on this inode */ |
73 | u64 nlookup; | |
74 | ||
e5e5558e | 75 | /** The request used for sending the FORGET message */ |
07e77dca | 76 | struct fuse_forget_link *forget; |
e5e5558e | 77 | |
d8a5ba45 | 78 | /** Time in jiffies until the file attributes are valid */ |
0a0898cf | 79 | u64 i_time; |
ebc14c4d MS |
80 | |
81 | /** The sticky bit in inode->i_mode may have been removed, so | |
82 | preserve the original mode */ | |
83 | mode_t orig_i_mode; | |
1fb69e78 MS |
84 | |
85 | /** Version of last attribute change */ | |
86 | u64 attr_version; | |
93a8c3cd MS |
87 | |
88 | /** Files usable in writepage. Protected by fc->lock */ | |
89 | struct list_head write_files; | |
3be5a52b MS |
90 | |
91 | /** Writepages pending on truncate or fsync */ | |
92 | struct list_head queued_writes; | |
93 | ||
94 | /** Number of sent writes, a negative bias (FUSE_NOWRITE) | |
95 | * means more writes are blocked */ | |
96 | int writectr; | |
97 | ||
98 | /** Waitq for writepage completion */ | |
99 | wait_queue_head_t page_waitq; | |
100 | ||
101 | /** List of writepage requestst (pending or sent) */ | |
102 | struct list_head writepages; | |
d8a5ba45 MS |
103 | }; |
104 | ||
da5e4714 MS |
105 | struct fuse_conn; |
106 | ||
b6aeaded MS |
107 | /** FUSE specific file data */ |
108 | struct fuse_file { | |
da5e4714 MS |
109 | /** Fuse connection for this file */ |
110 | struct fuse_conn *fc; | |
111 | ||
b6aeaded | 112 | /** Request reserved for flush and release */ |
33649c91 | 113 | struct fuse_req *reserved_req; |
b6aeaded | 114 | |
acf99433 TH |
115 | /** Kernel file handle guaranteed to be unique */ |
116 | u64 kh; | |
117 | ||
b6aeaded MS |
118 | /** File handle used by userspace */ |
119 | u64 fh; | |
c756e0a4 | 120 | |
da5e4714 MS |
121 | /** Node id of this file */ |
122 | u64 nodeid; | |
123 | ||
c756e0a4 MS |
124 | /** Refcount */ |
125 | atomic_t count; | |
93a8c3cd | 126 | |
c7b7143c MS |
127 | /** FOPEN_* flags returned by open */ |
128 | u32 open_flags; | |
129 | ||
93a8c3cd MS |
130 | /** Entry on inode's write_files list */ |
131 | struct list_head write_entry; | |
95668a69 TH |
132 | |
133 | /** RB node to be linked on fuse_conn->polled_files */ | |
134 | struct rb_node polled_node; | |
135 | ||
136 | /** Wait queue head for poll */ | |
137 | wait_queue_head_t poll_wait; | |
b6aeaded MS |
138 | }; |
139 | ||
334f485d MS |
140 | /** One input argument of a request */ |
141 | struct fuse_in_arg { | |
142 | unsigned size; | |
143 | const void *value; | |
144 | }; | |
145 | ||
146 | /** The request input */ | |
147 | struct fuse_in { | |
148 | /** The request header */ | |
149 | struct fuse_in_header h; | |
150 | ||
151 | /** True if the data for the last argument is in req->pages */ | |
152 | unsigned argpages:1; | |
153 | ||
154 | /** Number of arguments */ | |
155 | unsigned numargs; | |
156 | ||
157 | /** Array of arguments */ | |
158 | struct fuse_in_arg args[3]; | |
159 | }; | |
160 | ||
161 | /** One output argument of a request */ | |
162 | struct fuse_arg { | |
163 | unsigned size; | |
164 | void *value; | |
165 | }; | |
166 | ||
167 | /** The request output */ | |
168 | struct fuse_out { | |
169 | /** Header returned from userspace */ | |
170 | struct fuse_out_header h; | |
171 | ||
095da6cb MS |
172 | /* |
173 | * The following bitfields are not changed during the request | |
174 | * processing | |
175 | */ | |
176 | ||
334f485d MS |
177 | /** Last argument is variable length (can be shorter than |
178 | arg->size) */ | |
179 | unsigned argvar:1; | |
180 | ||
181 | /** Last argument is a list of pages to copy data to */ | |
182 | unsigned argpages:1; | |
183 | ||
184 | /** Zero partially or not copied pages */ | |
185 | unsigned page_zeroing:1; | |
186 | ||
ce534fb0 MS |
187 | /** Pages may be replaced with new ones */ |
188 | unsigned page_replace:1; | |
189 | ||
334f485d MS |
190 | /** Number or arguments */ |
191 | unsigned numargs; | |
192 | ||
193 | /** Array of arguments */ | |
194 | struct fuse_arg args[3]; | |
195 | }; | |
196 | ||
83cfd493 MS |
197 | /** The request state */ |
198 | enum fuse_req_state { | |
199 | FUSE_REQ_INIT = 0, | |
200 | FUSE_REQ_PENDING, | |
201 | FUSE_REQ_READING, | |
202 | FUSE_REQ_SENT, | |
a4d27e75 | 203 | FUSE_REQ_WRITING, |
83cfd493 MS |
204 | FUSE_REQ_FINISHED |
205 | }; | |
206 | ||
334f485d MS |
207 | /** |
208 | * A request to the client | |
209 | */ | |
210 | struct fuse_req { | |
ce1d5a49 MS |
211 | /** This can be on either pending processing or io lists in |
212 | fuse_conn */ | |
334f485d MS |
213 | struct list_head list; |
214 | ||
a4d27e75 MS |
215 | /** Entry on the interrupts list */ |
216 | struct list_head intr_entry; | |
217 | ||
334f485d MS |
218 | /** refcount */ |
219 | atomic_t count; | |
220 | ||
a4d27e75 MS |
221 | /** Unique ID for the interrupt request */ |
222 | u64 intr_unique; | |
223 | ||
095da6cb MS |
224 | /* |
225 | * The following bitfields are either set once before the | |
226 | * request is queued or setting/clearing them is protected by | |
d7133114 | 227 | * fuse_conn->lock |
095da6cb MS |
228 | */ |
229 | ||
334f485d MS |
230 | /** True if the request has reply */ |
231 | unsigned isreply:1; | |
232 | ||
51eb01e7 MS |
233 | /** Force sending of the request even if interrupted */ |
234 | unsigned force:1; | |
235 | ||
f9a2842e MS |
236 | /** The request was aborted */ |
237 | unsigned aborted:1; | |
334f485d MS |
238 | |
239 | /** Request is sent in the background */ | |
240 | unsigned background:1; | |
241 | ||
a4d27e75 MS |
242 | /** The request has been interrupted */ |
243 | unsigned interrupted:1; | |
244 | ||
334f485d MS |
245 | /** Data is being copied to/from the request */ |
246 | unsigned locked:1; | |
247 | ||
9bc5ddda MS |
248 | /** Request is counted as "waiting" */ |
249 | unsigned waiting:1; | |
250 | ||
83cfd493 MS |
251 | /** State of the request */ |
252 | enum fuse_req_state state; | |
334f485d MS |
253 | |
254 | /** The request input */ | |
255 | struct fuse_in in; | |
256 | ||
257 | /** The request output */ | |
258 | struct fuse_out out; | |
259 | ||
260 | /** Used to wake up the task waiting for completion of request*/ | |
261 | wait_queue_head_t waitq; | |
262 | ||
263 | /** Data for asynchronous requests */ | |
264 | union { | |
b57d4264 | 265 | struct { |
5a18ec17 MS |
266 | union { |
267 | struct fuse_release_in in; | |
268 | struct work_struct work; | |
269 | }; | |
b0be46eb | 270 | struct path path; |
b57d4264 | 271 | } release; |
3ec870d5 MS |
272 | struct fuse_init_in init_in; |
273 | struct fuse_init_out init_out; | |
08cbf542 TH |
274 | struct cuse_init_in cuse_init_in; |
275 | struct cuse_init_out cuse_init_out; | |
5c5c5e51 MS |
276 | struct { |
277 | struct fuse_read_in in; | |
278 | u64 attr_ver; | |
279 | } read; | |
b25e82e5 MS |
280 | struct { |
281 | struct fuse_write_in in; | |
282 | struct fuse_write_out out; | |
283 | } write; | |
2d45ba38 | 284 | struct fuse_notify_retrieve_in retrieve_in; |
71421259 | 285 | struct fuse_lk_in lk_in; |
334f485d MS |
286 | } misc; |
287 | ||
288 | /** page vector */ | |
289 | struct page *pages[FUSE_MAX_PAGES_PER_REQ]; | |
290 | ||
291 | /** number of pages in vector */ | |
292 | unsigned num_pages; | |
293 | ||
294 | /** offset of data on first page */ | |
295 | unsigned page_offset; | |
296 | ||
334f485d | 297 | /** File used in the request (or NULL) */ |
c756e0a4 | 298 | struct fuse_file *ff; |
64c6d8ed | 299 | |
3be5a52b MS |
300 | /** Inode used in the request or NULL */ |
301 | struct inode *inode; | |
302 | ||
303 | /** Link on fi->writepages */ | |
304 | struct list_head writepages_entry; | |
305 | ||
64c6d8ed MS |
306 | /** Request completion callback */ |
307 | void (*end)(struct fuse_conn *, struct fuse_req *); | |
33649c91 MS |
308 | |
309 | /** Request is stolen from fuse_file->reserved_req */ | |
310 | struct file *stolen_file; | |
334f485d MS |
311 | }; |
312 | ||
d8a5ba45 MS |
313 | /** |
314 | * A Fuse connection. | |
315 | * | |
316 | * This structure is created, when the filesystem is mounted, and is | |
317 | * destroyed, when the client device is closed and the filesystem is | |
318 | * unmounted. | |
319 | */ | |
320 | struct fuse_conn { | |
d7133114 MS |
321 | /** Lock protecting accessess to members of this structure */ |
322 | spinlock_t lock; | |
323 | ||
d2a85164 MS |
324 | /** Mutex protecting against directory alias creation */ |
325 | struct mutex inst_mutex; | |
326 | ||
bafa9654 MS |
327 | /** Refcount */ |
328 | atomic_t count; | |
329 | ||
d8a5ba45 MS |
330 | /** The user id for this mount */ |
331 | uid_t user_id; | |
332 | ||
87729a55 MS |
333 | /** The group id for this mount */ |
334 | gid_t group_id; | |
335 | ||
1e9a4ed9 MS |
336 | /** The fuse mount flags for this mount */ |
337 | unsigned flags; | |
338 | ||
db50b96c MS |
339 | /** Maximum read size */ |
340 | unsigned max_read; | |
341 | ||
413ef8cb MS |
342 | /** Maximum write size */ |
343 | unsigned max_write; | |
344 | ||
334f485d MS |
345 | /** Readers of the connection are waiting on this */ |
346 | wait_queue_head_t waitq; | |
347 | ||
348 | /** The list of pending requests */ | |
349 | struct list_head pending; | |
350 | ||
351 | /** The list of requests being processed */ | |
352 | struct list_head processing; | |
353 | ||
d77a1d5b MS |
354 | /** The list of requests under I/O */ |
355 | struct list_head io; | |
356 | ||
acf99433 TH |
357 | /** The next unique kernel file handle */ |
358 | u64 khctr; | |
359 | ||
95668a69 TH |
360 | /** rbtree of fuse_files waiting for poll events indexed by ph */ |
361 | struct rb_root polled_files; | |
362 | ||
7a6d3c8b CH |
363 | /** Maximum number of outstanding background requests */ |
364 | unsigned max_background; | |
365 | ||
366 | /** Number of background requests at which congestion starts */ | |
367 | unsigned congestion_threshold; | |
368 | ||
08a53cdc MS |
369 | /** Number of requests currently in the background */ |
370 | unsigned num_background; | |
371 | ||
d12def1b MS |
372 | /** Number of background requests currently queued for userspace */ |
373 | unsigned active_background; | |
374 | ||
375 | /** The list of background requests set aside for later queuing */ | |
376 | struct list_head bg_queue; | |
377 | ||
a4d27e75 MS |
378 | /** Pending interrupts */ |
379 | struct list_head interrupts; | |
380 | ||
07e77dca MS |
381 | /** Queue of pending forgets */ |
382 | struct fuse_forget_link forget_list_head; | |
383 | struct fuse_forget_link *forget_list_tail; | |
384 | ||
385 | /** Batching of FORGET requests (positive indicates FORGET batch) */ | |
386 | int forget_batch; | |
387 | ||
08a53cdc MS |
388 | /** Flag indicating if connection is blocked. This will be |
389 | the case before the INIT reply is received, and if there | |
390 | are too many outstading backgrounds requests */ | |
391 | int blocked; | |
392 | ||
393 | /** waitq for blocked connection */ | |
394 | wait_queue_head_t blocked_waitq; | |
de5e3dec MS |
395 | |
396 | /** waitq for reserved requests */ | |
397 | wait_queue_head_t reserved_req_waitq; | |
08a53cdc | 398 | |
334f485d MS |
399 | /** The next unique request id */ |
400 | u64 reqctr; | |
401 | ||
69a53bf2 MS |
402 | /** Connection established, cleared on umount, connection |
403 | abort and device release */ | |
095da6cb | 404 | unsigned connected; |
1e9a4ed9 | 405 | |
095da6cb MS |
406 | /** Connection failed (version mismatch). Cannot race with |
407 | setting other bitfields since it is only set once in INIT | |
408 | reply, before any other request, and never cleared */ | |
1729a16c | 409 | unsigned conn_error:1; |
334f485d | 410 | |
0ec7ca41 | 411 | /** Connection successful. Only set in INIT */ |
1729a16c | 412 | unsigned conn_init:1; |
0ec7ca41 | 413 | |
9cd68455 | 414 | /** Do readpages asynchronously? Only set in INIT */ |
1729a16c | 415 | unsigned async_read:1; |
9cd68455 | 416 | |
6ff958ed | 417 | /** Do not send separate SETATTR request before open(O_TRUNC) */ |
1729a16c | 418 | unsigned atomic_o_trunc:1; |
6ff958ed | 419 | |
33670fa2 | 420 | /** Filesystem supports NFS exporting. Only set in INIT */ |
1729a16c | 421 | unsigned export_support:1; |
33670fa2 | 422 | |
a325f9b9 TH |
423 | /** Set if bdi is valid */ |
424 | unsigned bdi_initialized:1; | |
425 | ||
095da6cb MS |
426 | /* |
427 | * The following bitfields are only for optimization purposes | |
428 | * and hence races in setting them will not cause malfunction | |
429 | */ | |
430 | ||
b6aeaded | 431 | /** Is fsync not implemented by fs? */ |
1729a16c | 432 | unsigned no_fsync:1; |
b6aeaded | 433 | |
82547981 | 434 | /** Is fsyncdir not implemented by fs? */ |
1729a16c | 435 | unsigned no_fsyncdir:1; |
82547981 | 436 | |
b6aeaded | 437 | /** Is flush not implemented by fs? */ |
1729a16c | 438 | unsigned no_flush:1; |
b6aeaded | 439 | |
92a8780e | 440 | /** Is setxattr not implemented by fs? */ |
1729a16c | 441 | unsigned no_setxattr:1; |
92a8780e MS |
442 | |
443 | /** Is getxattr not implemented by fs? */ | |
1729a16c | 444 | unsigned no_getxattr:1; |
92a8780e MS |
445 | |
446 | /** Is listxattr not implemented by fs? */ | |
1729a16c | 447 | unsigned no_listxattr:1; |
92a8780e MS |
448 | |
449 | /** Is removexattr not implemented by fs? */ | |
1729a16c | 450 | unsigned no_removexattr:1; |
92a8780e | 451 | |
71421259 | 452 | /** Are file locking primitives not implemented by fs? */ |
1729a16c | 453 | unsigned no_lock:1; |
71421259 | 454 | |
31d40d74 | 455 | /** Is access not implemented by fs? */ |
1729a16c | 456 | unsigned no_access:1; |
31d40d74 | 457 | |
fd72faac | 458 | /** Is create not implemented by fs? */ |
1729a16c | 459 | unsigned no_create:1; |
fd72faac | 460 | |
a4d27e75 | 461 | /** Is interrupt not implemented by fs? */ |
1729a16c | 462 | unsigned no_interrupt:1; |
a4d27e75 | 463 | |
b2d2272f | 464 | /** Is bmap not implemented by fs? */ |
1729a16c | 465 | unsigned no_bmap:1; |
b2d2272f | 466 | |
95668a69 TH |
467 | /** Is poll not implemented by fs? */ |
468 | unsigned no_poll:1; | |
469 | ||
78bb6cb9 | 470 | /** Do multi-page cached writes */ |
1729a16c | 471 | unsigned big_writes:1; |
78bb6cb9 | 472 | |
e0a43ddc MS |
473 | /** Don't apply umask to creation modes */ |
474 | unsigned dont_mask:1; | |
475 | ||
0cd5b885 MS |
476 | /** The number of requests waiting for completion */ |
477 | atomic_t num_waiting; | |
478 | ||
45714d65 MS |
479 | /** Negotiated minor version */ |
480 | unsigned minor; | |
481 | ||
d8a5ba45 MS |
482 | /** Backing dev info */ |
483 | struct backing_dev_info bdi; | |
f543f253 | 484 | |
bafa9654 MS |
485 | /** Entry on the fuse_conn_list */ |
486 | struct list_head entry; | |
487 | ||
b6f2fcbc MS |
488 | /** Device ID from super block */ |
489 | dev_t dev; | |
bafa9654 MS |
490 | |
491 | /** Dentries in the control filesystem */ | |
492 | struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; | |
493 | ||
494 | /** number of dentries used in the above array */ | |
495 | int ctl_ndents; | |
385a17bf JD |
496 | |
497 | /** O_ASYNC requests */ | |
498 | struct fasync_struct *fasync; | |
9c8ef561 MS |
499 | |
500 | /** Key for lock owner ID scrambling */ | |
501 | u32 scramble_key[4]; | |
0ec7ca41 MS |
502 | |
503 | /** Reserved request for the DESTROY message */ | |
504 | struct fuse_req *destroy_req; | |
1fb69e78 MS |
505 | |
506 | /** Version counter for attribute changes */ | |
507 | u64 attr_version; | |
43901aab TH |
508 | |
509 | /** Called on final put */ | |
510 | void (*release)(struct fuse_conn *); | |
3b463ae0 JM |
511 | |
512 | /** Super block for this connection. */ | |
513 | struct super_block *sb; | |
514 | ||
515 | /** Read/write semaphore to hold when accessing sb. */ | |
516 | struct rw_semaphore killsb; | |
d8a5ba45 MS |
517 | }; |
518 | ||
d8a5ba45 MS |
519 | static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) |
520 | { | |
6383bdaa | 521 | return sb->s_fs_info; |
d8a5ba45 MS |
522 | } |
523 | ||
524 | static inline struct fuse_conn *get_fuse_conn(struct inode *inode) | |
525 | { | |
526 | return get_fuse_conn_super(inode->i_sb); | |
527 | } | |
528 | ||
529 | static inline struct fuse_inode *get_fuse_inode(struct inode *inode) | |
530 | { | |
531 | return container_of(inode, struct fuse_inode, inode); | |
532 | } | |
533 | ||
534 | static inline u64 get_node_id(struct inode *inode) | |
535 | { | |
536 | return get_fuse_inode(inode)->nodeid; | |
537 | } | |
538 | ||
334f485d | 539 | /** Device operations */ |
4b6f5d20 | 540 | extern const struct file_operations fuse_dev_operations; |
334f485d | 541 | |
4269590a | 542 | extern const struct dentry_operations fuse_dentry_operations; |
dbd561d2 | 543 | |
3b463ae0 JM |
544 | /** |
545 | * Inode to nodeid comparison. | |
546 | */ | |
547 | int fuse_inode_eq(struct inode *inode, void *_nodeidp); | |
548 | ||
e5e5558e MS |
549 | /** |
550 | * Get a filled in inode | |
551 | */ | |
b48badf0 | 552 | struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
1fb69e78 MS |
553 | int generation, struct fuse_attr *attr, |
554 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 555 | |
33670fa2 MS |
556 | int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, |
557 | struct fuse_entry_out *outarg, struct inode **inode); | |
558 | ||
e5e5558e MS |
559 | /** |
560 | * Send FORGET command | |
561 | */ | |
07e77dca MS |
562 | void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, |
563 | u64 nodeid, u64 nlookup); | |
564 | ||
565 | struct fuse_forget_link *fuse_alloc_forget(void); | |
e5e5558e | 566 | |
04730fef | 567 | /** |
361b1eb5 | 568 | * Initialize READ or READDIR request |
04730fef | 569 | */ |
a6643094 | 570 | void fuse_read_fill(struct fuse_req *req, struct file *file, |
2106cb18 | 571 | loff_t pos, size_t count, int opcode); |
04730fef MS |
572 | |
573 | /** | |
574 | * Send OPEN or OPENDIR request | |
575 | */ | |
91fe96b4 | 576 | int fuse_open_common(struct inode *inode, struct file *file, bool isdir); |
04730fef | 577 | |
acf99433 | 578 | struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); |
c7b7143c | 579 | struct fuse_file *fuse_file_get(struct fuse_file *ff); |
fd72faac | 580 | void fuse_file_free(struct fuse_file *ff); |
c7b7143c | 581 | void fuse_finish_open(struct inode *inode, struct file *file); |
fd72faac | 582 | |
8b0797a4 | 583 | void fuse_sync_release(struct fuse_file *ff, int flags); |
c756e0a4 | 584 | |
04730fef MS |
585 | /** |
586 | * Send RELEASE or RELEASEDIR request | |
587 | */ | |
8b0797a4 | 588 | void fuse_release_common(struct file *file, int opcode); |
04730fef | 589 | |
82547981 MS |
590 | /** |
591 | * Send FSYNC or FSYNCDIR request | |
592 | */ | |
7ea80859 | 593 | int fuse_fsync_common(struct file *file, int datasync, int isdir); |
82547981 | 594 | |
95668a69 TH |
595 | /** |
596 | * Notify poll wakeup | |
597 | */ | |
598 | int fuse_notify_poll_wakeup(struct fuse_conn *fc, | |
599 | struct fuse_notify_poll_wakeup_out *outarg); | |
600 | ||
b6aeaded | 601 | /** |
1779381d | 602 | * Initialize file operations on a regular file |
b6aeaded MS |
603 | */ |
604 | void fuse_init_file_inode(struct inode *inode); | |
605 | ||
e5e5558e | 606 | /** |
1779381d | 607 | * Initialize inode operations on regular files and special files |
e5e5558e MS |
608 | */ |
609 | void fuse_init_common(struct inode *inode); | |
610 | ||
611 | /** | |
1779381d | 612 | * Initialize inode and file operations on a directory |
e5e5558e MS |
613 | */ |
614 | void fuse_init_dir(struct inode *inode); | |
615 | ||
616 | /** | |
1779381d | 617 | * Initialize inode operations on a symlink |
e5e5558e MS |
618 | */ |
619 | void fuse_init_symlink(struct inode *inode); | |
620 | ||
621 | /** | |
622 | * Change attributes of an inode | |
623 | */ | |
1fb69e78 MS |
624 | void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |
625 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 626 | |
3be5a52b MS |
627 | void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, |
628 | u64 attr_valid); | |
629 | ||
334f485d MS |
630 | /** |
631 | * Initialize the client device | |
632 | */ | |
633 | int fuse_dev_init(void); | |
634 | ||
635 | /** | |
636 | * Cleanup the client device | |
637 | */ | |
638 | void fuse_dev_cleanup(void); | |
639 | ||
bafa9654 MS |
640 | int fuse_ctl_init(void); |
641 | void fuse_ctl_cleanup(void); | |
642 | ||
334f485d MS |
643 | /** |
644 | * Allocate a request | |
645 | */ | |
646 | struct fuse_req *fuse_request_alloc(void); | |
647 | ||
3be5a52b MS |
648 | struct fuse_req *fuse_request_alloc_nofs(void); |
649 | ||
334f485d MS |
650 | /** |
651 | * Free a request | |
652 | */ | |
653 | void fuse_request_free(struct fuse_req *req); | |
654 | ||
334f485d | 655 | /** |
33649c91 | 656 | * Get a request, may fail with -ENOMEM |
334f485d | 657 | */ |
ce1d5a49 | 658 | struct fuse_req *fuse_get_req(struct fuse_conn *fc); |
334f485d | 659 | |
33649c91 MS |
660 | /** |
661 | * Gets a requests for a file operation, always succeeds | |
662 | */ | |
663 | struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file); | |
664 | ||
334f485d | 665 | /** |
ce1d5a49 MS |
666 | * Decrement reference count of a request. If count goes to zero free |
667 | * the request. | |
334f485d MS |
668 | */ |
669 | void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); | |
670 | ||
671 | /** | |
7c352bdf | 672 | * Send a request (synchronous) |
334f485d | 673 | */ |
b93f858a | 674 | void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 675 | |
334f485d MS |
676 | /** |
677 | * Send a request in the background | |
678 | */ | |
b93f858a | 679 | void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 680 | |
b93f858a TH |
681 | void fuse_request_send_background_locked(struct fuse_conn *fc, |
682 | struct fuse_req *req); | |
3be5a52b | 683 | |
5a5fb1ea | 684 | /* Abort all requests */ |
69a53bf2 MS |
685 | void fuse_abort_conn(struct fuse_conn *fc); |
686 | ||
e5e5558e MS |
687 | /** |
688 | * Invalidate inode attributes | |
689 | */ | |
690 | void fuse_invalidate_attr(struct inode *inode); | |
bafa9654 | 691 | |
dbd561d2 MS |
692 | void fuse_invalidate_entry_cache(struct dentry *entry); |
693 | ||
bafa9654 MS |
694 | /** |
695 | * Acquire reference to fuse_conn | |
696 | */ | |
697 | struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); | |
698 | ||
08cbf542 TH |
699 | void fuse_conn_kill(struct fuse_conn *fc); |
700 | ||
0d179aa5 TH |
701 | /** |
702 | * Initialize fuse_conn | |
703 | */ | |
a325f9b9 | 704 | void fuse_conn_init(struct fuse_conn *fc); |
0d179aa5 | 705 | |
bafa9654 MS |
706 | /** |
707 | * Release reference to fuse_conn | |
708 | */ | |
709 | void fuse_conn_put(struct fuse_conn *fc); | |
710 | ||
711 | /** | |
712 | * Add connection to control filesystem | |
713 | */ | |
714 | int fuse_ctl_add_conn(struct fuse_conn *fc); | |
715 | ||
716 | /** | |
717 | * Remove connection from control filesystem | |
718 | */ | |
719 | void fuse_ctl_remove_conn(struct fuse_conn *fc); | |
a5bfffac TS |
720 | |
721 | /** | |
722 | * Is file type valid? | |
723 | */ | |
724 | int fuse_valid_type(int m); | |
e57ac683 MS |
725 | |
726 | /** | |
727 | * Is task allowed to perform filesystem operation? | |
728 | */ | |
729 | int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); | |
f3332114 MS |
730 | |
731 | u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); | |
bcb4be80 MS |
732 | |
733 | int fuse_update_attributes(struct inode *inode, struct kstat *stat, | |
734 | struct file *file, bool *refreshed); | |
3be5a52b MS |
735 | |
736 | void fuse_flush_writepages(struct inode *inode); | |
737 | ||
738 | void fuse_set_nowrite(struct inode *inode); | |
739 | void fuse_release_nowrite(struct inode *inode); | |
5c5c5e51 MS |
740 | |
741 | u64 fuse_get_attr_version(struct fuse_conn *fc); | |
29d434b3 | 742 | |
3b463ae0 JM |
743 | /** |
744 | * File-system tells the kernel to invalidate cache for the given node id. | |
745 | */ | |
746 | int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, | |
747 | loff_t offset, loff_t len); | |
748 | ||
749 | /** | |
750 | * File-system tells the kernel to invalidate parent attributes and | |
751 | * the dentry matching parent/name. | |
752 | */ | |
753 | int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, | |
754 | struct qstr *name); | |
755 | ||
08cbf542 TH |
756 | int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, |
757 | bool isdir); | |
758 | ssize_t fuse_direct_io(struct file *file, const char __user *buf, | |
759 | size_t count, loff_t *ppos, int write); | |
760 | long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, | |
761 | unsigned int flags); | |
762 | unsigned fuse_file_poll(struct file *file, poll_table *wait); | |
763 | int fuse_dev_release(struct inode *inode, struct file *file); | |
764 | ||
a1d75f25 MS |
765 | void fuse_write_update_size(struct inode *inode, loff_t pos); |
766 | ||
29d434b3 | 767 | #endif /* _FS_FUSE_I_H */ |