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 */ | |
541af6a0 | 83 | umode_t orig_i_mode; |
1fb69e78 | 84 | |
45c72cd7 PS |
85 | /** 64 bit inode number */ |
86 | u64 orig_ino; | |
87 | ||
1fb69e78 MS |
88 | /** Version of last attribute change */ |
89 | u64 attr_version; | |
93a8c3cd MS |
90 | |
91 | /** Files usable in writepage. Protected by fc->lock */ | |
92 | struct list_head write_files; | |
3be5a52b MS |
93 | |
94 | /** Writepages pending on truncate or fsync */ | |
95 | struct list_head queued_writes; | |
96 | ||
97 | /** Number of sent writes, a negative bias (FUSE_NOWRITE) | |
98 | * means more writes are blocked */ | |
99 | int writectr; | |
100 | ||
101 | /** Waitq for writepage completion */ | |
102 | wait_queue_head_t page_waitq; | |
103 | ||
104 | /** List of writepage requestst (pending or sent) */ | |
105 | struct list_head writepages; | |
d8a5ba45 MS |
106 | }; |
107 | ||
da5e4714 MS |
108 | struct fuse_conn; |
109 | ||
b6aeaded MS |
110 | /** FUSE specific file data */ |
111 | struct fuse_file { | |
da5e4714 MS |
112 | /** Fuse connection for this file */ |
113 | struct fuse_conn *fc; | |
114 | ||
b6aeaded | 115 | /** Request reserved for flush and release */ |
33649c91 | 116 | struct fuse_req *reserved_req; |
b6aeaded | 117 | |
acf99433 TH |
118 | /** Kernel file handle guaranteed to be unique */ |
119 | u64 kh; | |
120 | ||
b6aeaded MS |
121 | /** File handle used by userspace */ |
122 | u64 fh; | |
c756e0a4 | 123 | |
da5e4714 MS |
124 | /** Node id of this file */ |
125 | u64 nodeid; | |
126 | ||
c756e0a4 MS |
127 | /** Refcount */ |
128 | atomic_t count; | |
93a8c3cd | 129 | |
c7b7143c MS |
130 | /** FOPEN_* flags returned by open */ |
131 | u32 open_flags; | |
132 | ||
93a8c3cd MS |
133 | /** Entry on inode's write_files list */ |
134 | struct list_head write_entry; | |
95668a69 TH |
135 | |
136 | /** RB node to be linked on fuse_conn->polled_files */ | |
137 | struct rb_node polled_node; | |
138 | ||
139 | /** Wait queue head for poll */ | |
140 | wait_queue_head_t poll_wait; | |
37fb3a30 MS |
141 | |
142 | /** Has flock been performed on this file? */ | |
143 | bool flock:1; | |
b6aeaded MS |
144 | }; |
145 | ||
334f485d MS |
146 | /** One input argument of a request */ |
147 | struct fuse_in_arg { | |
148 | unsigned size; | |
149 | const void *value; | |
150 | }; | |
151 | ||
152 | /** The request input */ | |
153 | struct fuse_in { | |
154 | /** The request header */ | |
155 | struct fuse_in_header h; | |
156 | ||
157 | /** True if the data for the last argument is in req->pages */ | |
158 | unsigned argpages:1; | |
159 | ||
160 | /** Number of arguments */ | |
161 | unsigned numargs; | |
162 | ||
163 | /** Array of arguments */ | |
164 | struct fuse_in_arg args[3]; | |
165 | }; | |
166 | ||
167 | /** One output argument of a request */ | |
168 | struct fuse_arg { | |
169 | unsigned size; | |
170 | void *value; | |
171 | }; | |
172 | ||
173 | /** The request output */ | |
174 | struct fuse_out { | |
175 | /** Header returned from userspace */ | |
176 | struct fuse_out_header h; | |
177 | ||
095da6cb MS |
178 | /* |
179 | * The following bitfields are not changed during the request | |
180 | * processing | |
181 | */ | |
182 | ||
334f485d MS |
183 | /** Last argument is variable length (can be shorter than |
184 | arg->size) */ | |
185 | unsigned argvar:1; | |
186 | ||
187 | /** Last argument is a list of pages to copy data to */ | |
188 | unsigned argpages:1; | |
189 | ||
190 | /** Zero partially or not copied pages */ | |
191 | unsigned page_zeroing:1; | |
192 | ||
ce534fb0 MS |
193 | /** Pages may be replaced with new ones */ |
194 | unsigned page_replace:1; | |
195 | ||
334f485d MS |
196 | /** Number or arguments */ |
197 | unsigned numargs; | |
198 | ||
199 | /** Array of arguments */ | |
200 | struct fuse_arg args[3]; | |
201 | }; | |
202 | ||
83cfd493 MS |
203 | /** The request state */ |
204 | enum fuse_req_state { | |
205 | FUSE_REQ_INIT = 0, | |
206 | FUSE_REQ_PENDING, | |
207 | FUSE_REQ_READING, | |
208 | FUSE_REQ_SENT, | |
a4d27e75 | 209 | FUSE_REQ_WRITING, |
83cfd493 MS |
210 | FUSE_REQ_FINISHED |
211 | }; | |
212 | ||
334f485d MS |
213 | /** |
214 | * A request to the client | |
215 | */ | |
216 | struct fuse_req { | |
ce1d5a49 MS |
217 | /** This can be on either pending processing or io lists in |
218 | fuse_conn */ | |
334f485d MS |
219 | struct list_head list; |
220 | ||
a4d27e75 MS |
221 | /** Entry on the interrupts list */ |
222 | struct list_head intr_entry; | |
223 | ||
334f485d MS |
224 | /** refcount */ |
225 | atomic_t count; | |
226 | ||
a4d27e75 MS |
227 | /** Unique ID for the interrupt request */ |
228 | u64 intr_unique; | |
229 | ||
095da6cb MS |
230 | /* |
231 | * The following bitfields are either set once before the | |
232 | * request is queued or setting/clearing them is protected by | |
d7133114 | 233 | * fuse_conn->lock |
095da6cb MS |
234 | */ |
235 | ||
334f485d MS |
236 | /** True if the request has reply */ |
237 | unsigned isreply:1; | |
238 | ||
51eb01e7 MS |
239 | /** Force sending of the request even if interrupted */ |
240 | unsigned force:1; | |
241 | ||
f9a2842e MS |
242 | /** The request was aborted */ |
243 | unsigned aborted:1; | |
334f485d MS |
244 | |
245 | /** Request is sent in the background */ | |
246 | unsigned background:1; | |
247 | ||
a4d27e75 MS |
248 | /** The request has been interrupted */ |
249 | unsigned interrupted:1; | |
250 | ||
334f485d MS |
251 | /** Data is being copied to/from the request */ |
252 | unsigned locked:1; | |
253 | ||
9bc5ddda MS |
254 | /** Request is counted as "waiting" */ |
255 | unsigned waiting:1; | |
256 | ||
83cfd493 MS |
257 | /** State of the request */ |
258 | enum fuse_req_state state; | |
334f485d MS |
259 | |
260 | /** The request input */ | |
261 | struct fuse_in in; | |
262 | ||
263 | /** The request output */ | |
264 | struct fuse_out out; | |
265 | ||
266 | /** Used to wake up the task waiting for completion of request*/ | |
267 | wait_queue_head_t waitq; | |
268 | ||
269 | /** Data for asynchronous requests */ | |
270 | union { | |
b57d4264 | 271 | struct { |
5a18ec17 MS |
272 | union { |
273 | struct fuse_release_in in; | |
274 | struct work_struct work; | |
275 | }; | |
b0be46eb | 276 | struct path path; |
b57d4264 | 277 | } release; |
3ec870d5 MS |
278 | struct fuse_init_in init_in; |
279 | struct fuse_init_out init_out; | |
08cbf542 | 280 | struct cuse_init_in cuse_init_in; |
5c5c5e51 MS |
281 | struct { |
282 | struct fuse_read_in in; | |
283 | u64 attr_ver; | |
284 | } read; | |
b25e82e5 MS |
285 | struct { |
286 | struct fuse_write_in in; | |
287 | struct fuse_write_out out; | |
288 | } write; | |
2d45ba38 | 289 | struct fuse_notify_retrieve_in retrieve_in; |
71421259 | 290 | struct fuse_lk_in lk_in; |
334f485d MS |
291 | } misc; |
292 | ||
293 | /** page vector */ | |
294 | struct page *pages[FUSE_MAX_PAGES_PER_REQ]; | |
295 | ||
296 | /** number of pages in vector */ | |
297 | unsigned num_pages; | |
298 | ||
299 | /** offset of data on first page */ | |
300 | unsigned page_offset; | |
301 | ||
334f485d | 302 | /** File used in the request (or NULL) */ |
c756e0a4 | 303 | struct fuse_file *ff; |
64c6d8ed | 304 | |
3be5a52b MS |
305 | /** Inode used in the request or NULL */ |
306 | struct inode *inode; | |
307 | ||
308 | /** Link on fi->writepages */ | |
309 | struct list_head writepages_entry; | |
310 | ||
64c6d8ed MS |
311 | /** Request completion callback */ |
312 | void (*end)(struct fuse_conn *, struct fuse_req *); | |
33649c91 MS |
313 | |
314 | /** Request is stolen from fuse_file->reserved_req */ | |
315 | struct file *stolen_file; | |
334f485d MS |
316 | }; |
317 | ||
d8a5ba45 MS |
318 | /** |
319 | * A Fuse connection. | |
320 | * | |
321 | * This structure is created, when the filesystem is mounted, and is | |
322 | * destroyed, when the client device is closed and the filesystem is | |
323 | * unmounted. | |
324 | */ | |
325 | struct fuse_conn { | |
d7133114 MS |
326 | /** Lock protecting accessess to members of this structure */ |
327 | spinlock_t lock; | |
328 | ||
d2a85164 MS |
329 | /** Mutex protecting against directory alias creation */ |
330 | struct mutex inst_mutex; | |
331 | ||
bafa9654 MS |
332 | /** Refcount */ |
333 | atomic_t count; | |
334 | ||
d8a5ba45 MS |
335 | /** The user id for this mount */ |
336 | uid_t user_id; | |
337 | ||
87729a55 MS |
338 | /** The group id for this mount */ |
339 | gid_t group_id; | |
340 | ||
1e9a4ed9 MS |
341 | /** The fuse mount flags for this mount */ |
342 | unsigned flags; | |
343 | ||
db50b96c MS |
344 | /** Maximum read size */ |
345 | unsigned max_read; | |
346 | ||
413ef8cb MS |
347 | /** Maximum write size */ |
348 | unsigned max_write; | |
349 | ||
334f485d MS |
350 | /** Readers of the connection are waiting on this */ |
351 | wait_queue_head_t waitq; | |
352 | ||
353 | /** The list of pending requests */ | |
354 | struct list_head pending; | |
355 | ||
356 | /** The list of requests being processed */ | |
357 | struct list_head processing; | |
358 | ||
d77a1d5b MS |
359 | /** The list of requests under I/O */ |
360 | struct list_head io; | |
361 | ||
acf99433 TH |
362 | /** The next unique kernel file handle */ |
363 | u64 khctr; | |
364 | ||
95668a69 TH |
365 | /** rbtree of fuse_files waiting for poll events indexed by ph */ |
366 | struct rb_root polled_files; | |
367 | ||
7a6d3c8b CH |
368 | /** Maximum number of outstanding background requests */ |
369 | unsigned max_background; | |
370 | ||
371 | /** Number of background requests at which congestion starts */ | |
372 | unsigned congestion_threshold; | |
373 | ||
08a53cdc MS |
374 | /** Number of requests currently in the background */ |
375 | unsigned num_background; | |
376 | ||
d12def1b MS |
377 | /** Number of background requests currently queued for userspace */ |
378 | unsigned active_background; | |
379 | ||
380 | /** The list of background requests set aside for later queuing */ | |
381 | struct list_head bg_queue; | |
382 | ||
a4d27e75 MS |
383 | /** Pending interrupts */ |
384 | struct list_head interrupts; | |
385 | ||
07e77dca MS |
386 | /** Queue of pending forgets */ |
387 | struct fuse_forget_link forget_list_head; | |
388 | struct fuse_forget_link *forget_list_tail; | |
389 | ||
390 | /** Batching of FORGET requests (positive indicates FORGET batch) */ | |
391 | int forget_batch; | |
392 | ||
08a53cdc MS |
393 | /** Flag indicating if connection is blocked. This will be |
394 | the case before the INIT reply is received, and if there | |
395 | are too many outstading backgrounds requests */ | |
396 | int blocked; | |
397 | ||
398 | /** waitq for blocked connection */ | |
399 | wait_queue_head_t blocked_waitq; | |
de5e3dec MS |
400 | |
401 | /** waitq for reserved requests */ | |
402 | wait_queue_head_t reserved_req_waitq; | |
08a53cdc | 403 | |
334f485d MS |
404 | /** The next unique request id */ |
405 | u64 reqctr; | |
406 | ||
69a53bf2 MS |
407 | /** Connection established, cleared on umount, connection |
408 | abort and device release */ | |
095da6cb | 409 | unsigned connected; |
1e9a4ed9 | 410 | |
095da6cb MS |
411 | /** Connection failed (version mismatch). Cannot race with |
412 | setting other bitfields since it is only set once in INIT | |
413 | reply, before any other request, and never cleared */ | |
1729a16c | 414 | unsigned conn_error:1; |
334f485d | 415 | |
0ec7ca41 | 416 | /** Connection successful. Only set in INIT */ |
1729a16c | 417 | unsigned conn_init:1; |
0ec7ca41 | 418 | |
9cd68455 | 419 | /** Do readpages asynchronously? Only set in INIT */ |
1729a16c | 420 | unsigned async_read:1; |
9cd68455 | 421 | |
6ff958ed | 422 | /** Do not send separate SETATTR request before open(O_TRUNC) */ |
1729a16c | 423 | unsigned atomic_o_trunc:1; |
6ff958ed | 424 | |
33670fa2 | 425 | /** Filesystem supports NFS exporting. Only set in INIT */ |
1729a16c | 426 | unsigned export_support:1; |
33670fa2 | 427 | |
a325f9b9 TH |
428 | /** Set if bdi is valid */ |
429 | unsigned bdi_initialized:1; | |
430 | ||
095da6cb MS |
431 | /* |
432 | * The following bitfields are only for optimization purposes | |
433 | * and hence races in setting them will not cause malfunction | |
434 | */ | |
435 | ||
b6aeaded | 436 | /** Is fsync not implemented by fs? */ |
1729a16c | 437 | unsigned no_fsync:1; |
b6aeaded | 438 | |
82547981 | 439 | /** Is fsyncdir not implemented by fs? */ |
1729a16c | 440 | unsigned no_fsyncdir:1; |
82547981 | 441 | |
b6aeaded | 442 | /** Is flush not implemented by fs? */ |
1729a16c | 443 | unsigned no_flush:1; |
b6aeaded | 444 | |
92a8780e | 445 | /** Is setxattr not implemented by fs? */ |
1729a16c | 446 | unsigned no_setxattr:1; |
92a8780e MS |
447 | |
448 | /** Is getxattr not implemented by fs? */ | |
1729a16c | 449 | unsigned no_getxattr:1; |
92a8780e MS |
450 | |
451 | /** Is listxattr not implemented by fs? */ | |
1729a16c | 452 | unsigned no_listxattr:1; |
92a8780e MS |
453 | |
454 | /** Is removexattr not implemented by fs? */ | |
1729a16c | 455 | unsigned no_removexattr:1; |
92a8780e | 456 | |
37fb3a30 | 457 | /** Are posix file locking primitives not implemented by fs? */ |
1729a16c | 458 | unsigned no_lock:1; |
71421259 | 459 | |
31d40d74 | 460 | /** Is access not implemented by fs? */ |
1729a16c | 461 | unsigned no_access:1; |
31d40d74 | 462 | |
fd72faac | 463 | /** Is create not implemented by fs? */ |
1729a16c | 464 | unsigned no_create:1; |
fd72faac | 465 | |
a4d27e75 | 466 | /** Is interrupt not implemented by fs? */ |
1729a16c | 467 | unsigned no_interrupt:1; |
a4d27e75 | 468 | |
b2d2272f | 469 | /** Is bmap not implemented by fs? */ |
1729a16c | 470 | unsigned no_bmap:1; |
b2d2272f | 471 | |
95668a69 TH |
472 | /** Is poll not implemented by fs? */ |
473 | unsigned no_poll:1; | |
474 | ||
78bb6cb9 | 475 | /** Do multi-page cached writes */ |
1729a16c | 476 | unsigned big_writes:1; |
78bb6cb9 | 477 | |
e0a43ddc MS |
478 | /** Don't apply umask to creation modes */ |
479 | unsigned dont_mask:1; | |
480 | ||
37fb3a30 MS |
481 | /** Are BSD file locking primitives not implemented by fs? */ |
482 | unsigned no_flock:1; | |
483 | ||
519c6040 MS |
484 | /** Is fallocate not implemented by fs? */ |
485 | unsigned no_fallocate:1; | |
486 | ||
0cd5b885 MS |
487 | /** The number of requests waiting for completion */ |
488 | atomic_t num_waiting; | |
489 | ||
45714d65 MS |
490 | /** Negotiated minor version */ |
491 | unsigned minor; | |
492 | ||
d8a5ba45 MS |
493 | /** Backing dev info */ |
494 | struct backing_dev_info bdi; | |
f543f253 | 495 | |
bafa9654 MS |
496 | /** Entry on the fuse_conn_list */ |
497 | struct list_head entry; | |
498 | ||
b6f2fcbc MS |
499 | /** Device ID from super block */ |
500 | dev_t dev; | |
bafa9654 MS |
501 | |
502 | /** Dentries in the control filesystem */ | |
503 | struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; | |
504 | ||
505 | /** number of dentries used in the above array */ | |
506 | int ctl_ndents; | |
385a17bf JD |
507 | |
508 | /** O_ASYNC requests */ | |
509 | struct fasync_struct *fasync; | |
9c8ef561 MS |
510 | |
511 | /** Key for lock owner ID scrambling */ | |
512 | u32 scramble_key[4]; | |
0ec7ca41 MS |
513 | |
514 | /** Reserved request for the DESTROY message */ | |
515 | struct fuse_req *destroy_req; | |
1fb69e78 MS |
516 | |
517 | /** Version counter for attribute changes */ | |
518 | u64 attr_version; | |
43901aab TH |
519 | |
520 | /** Called on final put */ | |
521 | void (*release)(struct fuse_conn *); | |
3b463ae0 JM |
522 | |
523 | /** Super block for this connection. */ | |
524 | struct super_block *sb; | |
525 | ||
526 | /** Read/write semaphore to hold when accessing sb. */ | |
527 | struct rw_semaphore killsb; | |
d8a5ba45 MS |
528 | }; |
529 | ||
d8a5ba45 MS |
530 | static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) |
531 | { | |
6383bdaa | 532 | return sb->s_fs_info; |
d8a5ba45 MS |
533 | } |
534 | ||
535 | static inline struct fuse_conn *get_fuse_conn(struct inode *inode) | |
536 | { | |
537 | return get_fuse_conn_super(inode->i_sb); | |
538 | } | |
539 | ||
540 | static inline struct fuse_inode *get_fuse_inode(struct inode *inode) | |
541 | { | |
542 | return container_of(inode, struct fuse_inode, inode); | |
543 | } | |
544 | ||
545 | static inline u64 get_node_id(struct inode *inode) | |
546 | { | |
547 | return get_fuse_inode(inode)->nodeid; | |
548 | } | |
549 | ||
334f485d | 550 | /** Device operations */ |
4b6f5d20 | 551 | extern const struct file_operations fuse_dev_operations; |
334f485d | 552 | |
4269590a | 553 | extern const struct dentry_operations fuse_dentry_operations; |
dbd561d2 | 554 | |
3b463ae0 JM |
555 | /** |
556 | * Inode to nodeid comparison. | |
557 | */ | |
558 | int fuse_inode_eq(struct inode *inode, void *_nodeidp); | |
559 | ||
e5e5558e MS |
560 | /** |
561 | * Get a filled in inode | |
562 | */ | |
b48badf0 | 563 | struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
1fb69e78 MS |
564 | int generation, struct fuse_attr *attr, |
565 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 566 | |
33670fa2 MS |
567 | int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, |
568 | struct fuse_entry_out *outarg, struct inode **inode); | |
569 | ||
e5e5558e MS |
570 | /** |
571 | * Send FORGET command | |
572 | */ | |
07e77dca MS |
573 | void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, |
574 | u64 nodeid, u64 nlookup); | |
575 | ||
576 | struct fuse_forget_link *fuse_alloc_forget(void); | |
e5e5558e | 577 | |
04730fef | 578 | /** |
361b1eb5 | 579 | * Initialize READ or READDIR request |
04730fef | 580 | */ |
a6643094 | 581 | void fuse_read_fill(struct fuse_req *req, struct file *file, |
2106cb18 | 582 | loff_t pos, size_t count, int opcode); |
04730fef MS |
583 | |
584 | /** | |
585 | * Send OPEN or OPENDIR request | |
586 | */ | |
91fe96b4 | 587 | int fuse_open_common(struct inode *inode, struct file *file, bool isdir); |
04730fef | 588 | |
acf99433 | 589 | struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); |
c7b7143c | 590 | struct fuse_file *fuse_file_get(struct fuse_file *ff); |
fd72faac | 591 | void fuse_file_free(struct fuse_file *ff); |
c7b7143c | 592 | void fuse_finish_open(struct inode *inode, struct file *file); |
fd72faac | 593 | |
8b0797a4 | 594 | void fuse_sync_release(struct fuse_file *ff, int flags); |
c756e0a4 | 595 | |
04730fef MS |
596 | /** |
597 | * Send RELEASE or RELEASEDIR request | |
598 | */ | |
8b0797a4 | 599 | void fuse_release_common(struct file *file, int opcode); |
04730fef | 600 | |
82547981 MS |
601 | /** |
602 | * Send FSYNC or FSYNCDIR request | |
603 | */ | |
02c24a82 JB |
604 | int fuse_fsync_common(struct file *file, loff_t start, loff_t end, |
605 | int datasync, int isdir); | |
82547981 | 606 | |
95668a69 TH |
607 | /** |
608 | * Notify poll wakeup | |
609 | */ | |
610 | int fuse_notify_poll_wakeup(struct fuse_conn *fc, | |
611 | struct fuse_notify_poll_wakeup_out *outarg); | |
612 | ||
b6aeaded | 613 | /** |
1779381d | 614 | * Initialize file operations on a regular file |
b6aeaded MS |
615 | */ |
616 | void fuse_init_file_inode(struct inode *inode); | |
617 | ||
e5e5558e | 618 | /** |
1779381d | 619 | * Initialize inode operations on regular files and special files |
e5e5558e MS |
620 | */ |
621 | void fuse_init_common(struct inode *inode); | |
622 | ||
623 | /** | |
1779381d | 624 | * Initialize inode and file operations on a directory |
e5e5558e MS |
625 | */ |
626 | void fuse_init_dir(struct inode *inode); | |
627 | ||
628 | /** | |
1779381d | 629 | * Initialize inode operations on a symlink |
e5e5558e MS |
630 | */ |
631 | void fuse_init_symlink(struct inode *inode); | |
632 | ||
633 | /** | |
634 | * Change attributes of an inode | |
635 | */ | |
1fb69e78 MS |
636 | void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |
637 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 638 | |
3be5a52b MS |
639 | void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, |
640 | u64 attr_valid); | |
641 | ||
334f485d MS |
642 | /** |
643 | * Initialize the client device | |
644 | */ | |
645 | int fuse_dev_init(void); | |
646 | ||
647 | /** | |
648 | * Cleanup the client device | |
649 | */ | |
650 | void fuse_dev_cleanup(void); | |
651 | ||
bafa9654 MS |
652 | int fuse_ctl_init(void); |
653 | void fuse_ctl_cleanup(void); | |
654 | ||
334f485d MS |
655 | /** |
656 | * Allocate a request | |
657 | */ | |
658 | struct fuse_req *fuse_request_alloc(void); | |
659 | ||
3be5a52b MS |
660 | struct fuse_req *fuse_request_alloc_nofs(void); |
661 | ||
334f485d MS |
662 | /** |
663 | * Free a request | |
664 | */ | |
665 | void fuse_request_free(struct fuse_req *req); | |
666 | ||
334f485d | 667 | /** |
33649c91 | 668 | * Get a request, may fail with -ENOMEM |
334f485d | 669 | */ |
ce1d5a49 | 670 | struct fuse_req *fuse_get_req(struct fuse_conn *fc); |
334f485d | 671 | |
33649c91 MS |
672 | /** |
673 | * Gets a requests for a file operation, always succeeds | |
674 | */ | |
675 | struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file); | |
676 | ||
334f485d | 677 | /** |
ce1d5a49 MS |
678 | * Decrement reference count of a request. If count goes to zero free |
679 | * the request. | |
334f485d MS |
680 | */ |
681 | void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); | |
682 | ||
683 | /** | |
7c352bdf | 684 | * Send a request (synchronous) |
334f485d | 685 | */ |
b93f858a | 686 | void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 687 | |
334f485d MS |
688 | /** |
689 | * Send a request in the background | |
690 | */ | |
b93f858a | 691 | void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 692 | |
b93f858a TH |
693 | void fuse_request_send_background_locked(struct fuse_conn *fc, |
694 | struct fuse_req *req); | |
3be5a52b | 695 | |
5a5fb1ea | 696 | /* Abort all requests */ |
69a53bf2 MS |
697 | void fuse_abort_conn(struct fuse_conn *fc); |
698 | ||
e5e5558e MS |
699 | /** |
700 | * Invalidate inode attributes | |
701 | */ | |
702 | void fuse_invalidate_attr(struct inode *inode); | |
bafa9654 | 703 | |
dbd561d2 MS |
704 | void fuse_invalidate_entry_cache(struct dentry *entry); |
705 | ||
bafa9654 MS |
706 | /** |
707 | * Acquire reference to fuse_conn | |
708 | */ | |
709 | struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); | |
710 | ||
08cbf542 TH |
711 | void fuse_conn_kill(struct fuse_conn *fc); |
712 | ||
0d179aa5 TH |
713 | /** |
714 | * Initialize fuse_conn | |
715 | */ | |
a325f9b9 | 716 | void fuse_conn_init(struct fuse_conn *fc); |
0d179aa5 | 717 | |
bafa9654 MS |
718 | /** |
719 | * Release reference to fuse_conn | |
720 | */ | |
721 | void fuse_conn_put(struct fuse_conn *fc); | |
722 | ||
723 | /** | |
724 | * Add connection to control filesystem | |
725 | */ | |
726 | int fuse_ctl_add_conn(struct fuse_conn *fc); | |
727 | ||
728 | /** | |
729 | * Remove connection from control filesystem | |
730 | */ | |
731 | void fuse_ctl_remove_conn(struct fuse_conn *fc); | |
a5bfffac TS |
732 | |
733 | /** | |
734 | * Is file type valid? | |
735 | */ | |
736 | int fuse_valid_type(int m); | |
e57ac683 MS |
737 | |
738 | /** | |
739 | * Is task allowed to perform filesystem operation? | |
740 | */ | |
741 | int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); | |
f3332114 MS |
742 | |
743 | u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); | |
bcb4be80 MS |
744 | |
745 | int fuse_update_attributes(struct inode *inode, struct kstat *stat, | |
746 | struct file *file, bool *refreshed); | |
3be5a52b MS |
747 | |
748 | void fuse_flush_writepages(struct inode *inode); | |
749 | ||
750 | void fuse_set_nowrite(struct inode *inode); | |
751 | void fuse_release_nowrite(struct inode *inode); | |
5c5c5e51 MS |
752 | |
753 | u64 fuse_get_attr_version(struct fuse_conn *fc); | |
29d434b3 | 754 | |
3b463ae0 JM |
755 | /** |
756 | * File-system tells the kernel to invalidate cache for the given node id. | |
757 | */ | |
758 | int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, | |
759 | loff_t offset, loff_t len); | |
760 | ||
761 | /** | |
762 | * File-system tells the kernel to invalidate parent attributes and | |
763 | * the dentry matching parent/name. | |
451d0f59 JM |
764 | * |
765 | * If the child_nodeid is non-zero and: | |
766 | * - matches the inode number for the dentry matching parent/name, | |
767 | * - is not a mount point | |
768 | * - is a file or oan empty directory | |
769 | * then the dentry is unhashed (d_delete()). | |
3b463ae0 JM |
770 | */ |
771 | int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, | |
451d0f59 | 772 | u64 child_nodeid, struct qstr *name); |
3b463ae0 | 773 | |
08cbf542 TH |
774 | int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, |
775 | bool isdir); | |
776 | ssize_t fuse_direct_io(struct file *file, const char __user *buf, | |
777 | size_t count, loff_t *ppos, int write); | |
778 | long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, | |
779 | unsigned int flags); | |
b18da0c5 MS |
780 | long fuse_ioctl_common(struct file *file, unsigned int cmd, |
781 | unsigned long arg, unsigned int flags); | |
08cbf542 TH |
782 | unsigned fuse_file_poll(struct file *file, poll_table *wait); |
783 | int fuse_dev_release(struct inode *inode, struct file *file); | |
784 | ||
a1d75f25 MS |
785 | void fuse_write_update_size(struct inode *inode, loff_t pos); |
786 | ||
29d434b3 | 787 | #endif /* _FS_FUSE_I_H */ |