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Commit | Line | Data |
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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> | |
d8a5ba45 | 24 | |
334f485d MS |
25 | /** Max number of pages that can be used in a single read request */ |
26 | #define FUSE_MAX_PAGES_PER_REQ 32 | |
27 | ||
3be5a52b MS |
28 | /** Bias for fi->writectr, meaning new writepages must not be sent */ |
29 | #define FUSE_NOWRITE INT_MIN | |
30 | ||
1d3d752b MS |
31 | /** It could be as large as PATH_MAX, but would that have any uses? */ |
32 | #define FUSE_NAME_MAX 1024 | |
33 | ||
bafa9654 | 34 | /** Number of dentries for each connection in the control filesystem */ |
79a9d994 | 35 | #define FUSE_CTL_NUM_DENTRIES 5 |
bafa9654 | 36 | |
1e9a4ed9 MS |
37 | /** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem |
38 | module will check permissions based on the file mode. Otherwise no | |
39 | permission checking is done in the kernel */ | |
40 | #define FUSE_DEFAULT_PERMISSIONS (1 << 0) | |
41 | ||
42 | /** If the FUSE_ALLOW_OTHER flag is given, then not only the user | |
43 | doing the mount will be allowed to access the filesystem */ | |
44 | #define FUSE_ALLOW_OTHER (1 << 1) | |
45 | ||
bafa9654 MS |
46 | /** List of active connections */ |
47 | extern struct list_head fuse_conn_list; | |
48 | ||
49 | /** Global mutex protecting fuse_conn_list and the control filesystem */ | |
50 | extern struct mutex fuse_mutex; | |
413ef8cb | 51 | |
79a9d994 CH |
52 | /** Module parameters */ |
53 | extern unsigned max_user_bgreq; | |
54 | extern unsigned max_user_congthresh; | |
55 | ||
07e77dca MS |
56 | /* One forget request */ |
57 | struct fuse_forget_link { | |
58 | u64 nodeid; | |
59 | u64 nlookup; | |
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 MS |
265 | struct { |
266 | struct fuse_release_in in; | |
b0be46eb | 267 | struct path path; |
b57d4264 | 268 | } release; |
3ec870d5 MS |
269 | struct fuse_init_in init_in; |
270 | struct fuse_init_out init_out; | |
08cbf542 TH |
271 | struct cuse_init_in cuse_init_in; |
272 | struct cuse_init_out cuse_init_out; | |
5c5c5e51 MS |
273 | struct { |
274 | struct fuse_read_in in; | |
275 | u64 attr_ver; | |
276 | } read; | |
b25e82e5 MS |
277 | struct { |
278 | struct fuse_write_in in; | |
279 | struct fuse_write_out out; | |
280 | } write; | |
2d45ba38 | 281 | struct fuse_notify_retrieve_in retrieve_in; |
71421259 | 282 | struct fuse_lk_in lk_in; |
334f485d MS |
283 | } misc; |
284 | ||
285 | /** page vector */ | |
286 | struct page *pages[FUSE_MAX_PAGES_PER_REQ]; | |
287 | ||
288 | /** number of pages in vector */ | |
289 | unsigned num_pages; | |
290 | ||
291 | /** offset of data on first page */ | |
292 | unsigned page_offset; | |
293 | ||
334f485d | 294 | /** File used in the request (or NULL) */ |
c756e0a4 | 295 | struct fuse_file *ff; |
64c6d8ed | 296 | |
3be5a52b MS |
297 | /** Inode used in the request or NULL */ |
298 | struct inode *inode; | |
299 | ||
300 | /** Link on fi->writepages */ | |
301 | struct list_head writepages_entry; | |
302 | ||
64c6d8ed MS |
303 | /** Request completion callback */ |
304 | void (*end)(struct fuse_conn *, struct fuse_req *); | |
33649c91 MS |
305 | |
306 | /** Request is stolen from fuse_file->reserved_req */ | |
307 | struct file *stolen_file; | |
334f485d MS |
308 | }; |
309 | ||
d8a5ba45 MS |
310 | /** |
311 | * A Fuse connection. | |
312 | * | |
313 | * This structure is created, when the filesystem is mounted, and is | |
314 | * destroyed, when the client device is closed and the filesystem is | |
315 | * unmounted. | |
316 | */ | |
317 | struct fuse_conn { | |
d7133114 MS |
318 | /** Lock protecting accessess to members of this structure */ |
319 | spinlock_t lock; | |
320 | ||
d2a85164 MS |
321 | /** Mutex protecting against directory alias creation */ |
322 | struct mutex inst_mutex; | |
323 | ||
bafa9654 MS |
324 | /** Refcount */ |
325 | atomic_t count; | |
326 | ||
d8a5ba45 MS |
327 | /** The user id for this mount */ |
328 | uid_t user_id; | |
329 | ||
87729a55 MS |
330 | /** The group id for this mount */ |
331 | gid_t group_id; | |
332 | ||
1e9a4ed9 MS |
333 | /** The fuse mount flags for this mount */ |
334 | unsigned flags; | |
335 | ||
db50b96c MS |
336 | /** Maximum read size */ |
337 | unsigned max_read; | |
338 | ||
413ef8cb MS |
339 | /** Maximum write size */ |
340 | unsigned max_write; | |
341 | ||
334f485d MS |
342 | /** Readers of the connection are waiting on this */ |
343 | wait_queue_head_t waitq; | |
344 | ||
345 | /** The list of pending requests */ | |
346 | struct list_head pending; | |
347 | ||
348 | /** The list of requests being processed */ | |
349 | struct list_head processing; | |
350 | ||
d77a1d5b MS |
351 | /** The list of requests under I/O */ |
352 | struct list_head io; | |
353 | ||
acf99433 TH |
354 | /** The next unique kernel file handle */ |
355 | u64 khctr; | |
356 | ||
95668a69 TH |
357 | /** rbtree of fuse_files waiting for poll events indexed by ph */ |
358 | struct rb_root polled_files; | |
359 | ||
7a6d3c8b CH |
360 | /** Maximum number of outstanding background requests */ |
361 | unsigned max_background; | |
362 | ||
363 | /** Number of background requests at which congestion starts */ | |
364 | unsigned congestion_threshold; | |
365 | ||
08a53cdc MS |
366 | /** Number of requests currently in the background */ |
367 | unsigned num_background; | |
368 | ||
d12def1b MS |
369 | /** Number of background requests currently queued for userspace */ |
370 | unsigned active_background; | |
371 | ||
372 | /** The list of background requests set aside for later queuing */ | |
373 | struct list_head bg_queue; | |
374 | ||
a4d27e75 MS |
375 | /** Pending interrupts */ |
376 | struct list_head interrupts; | |
377 | ||
07e77dca MS |
378 | /** Queue of pending forgets */ |
379 | struct fuse_forget_link forget_list_head; | |
380 | struct fuse_forget_link *forget_list_tail; | |
381 | ||
382 | /** Batching of FORGET requests (positive indicates FORGET batch) */ | |
383 | int forget_batch; | |
384 | ||
08a53cdc MS |
385 | /** Flag indicating if connection is blocked. This will be |
386 | the case before the INIT reply is received, and if there | |
387 | are too many outstading backgrounds requests */ | |
388 | int blocked; | |
389 | ||
390 | /** waitq for blocked connection */ | |
391 | wait_queue_head_t blocked_waitq; | |
de5e3dec MS |
392 | |
393 | /** waitq for reserved requests */ | |
394 | wait_queue_head_t reserved_req_waitq; | |
08a53cdc | 395 | |
334f485d MS |
396 | /** The next unique request id */ |
397 | u64 reqctr; | |
398 | ||
69a53bf2 MS |
399 | /** Connection established, cleared on umount, connection |
400 | abort and device release */ | |
095da6cb | 401 | unsigned connected; |
1e9a4ed9 | 402 | |
095da6cb MS |
403 | /** Connection failed (version mismatch). Cannot race with |
404 | setting other bitfields since it is only set once in INIT | |
405 | reply, before any other request, and never cleared */ | |
1729a16c | 406 | unsigned conn_error:1; |
334f485d | 407 | |
0ec7ca41 | 408 | /** Connection successful. Only set in INIT */ |
1729a16c | 409 | unsigned conn_init:1; |
0ec7ca41 | 410 | |
9cd68455 | 411 | /** Do readpages asynchronously? Only set in INIT */ |
1729a16c | 412 | unsigned async_read:1; |
9cd68455 | 413 | |
6ff958ed | 414 | /** Do not send separate SETATTR request before open(O_TRUNC) */ |
1729a16c | 415 | unsigned atomic_o_trunc:1; |
6ff958ed | 416 | |
33670fa2 | 417 | /** Filesystem supports NFS exporting. Only set in INIT */ |
1729a16c | 418 | unsigned export_support:1; |
33670fa2 | 419 | |
a325f9b9 TH |
420 | /** Set if bdi is valid */ |
421 | unsigned bdi_initialized:1; | |
422 | ||
095da6cb MS |
423 | /* |
424 | * The following bitfields are only for optimization purposes | |
425 | * and hence races in setting them will not cause malfunction | |
426 | */ | |
427 | ||
b6aeaded | 428 | /** Is fsync not implemented by fs? */ |
1729a16c | 429 | unsigned no_fsync:1; |
b6aeaded | 430 | |
82547981 | 431 | /** Is fsyncdir not implemented by fs? */ |
1729a16c | 432 | unsigned no_fsyncdir:1; |
82547981 | 433 | |
b6aeaded | 434 | /** Is flush not implemented by fs? */ |
1729a16c | 435 | unsigned no_flush:1; |
b6aeaded | 436 | |
92a8780e | 437 | /** Is setxattr not implemented by fs? */ |
1729a16c | 438 | unsigned no_setxattr:1; |
92a8780e MS |
439 | |
440 | /** Is getxattr not implemented by fs? */ | |
1729a16c | 441 | unsigned no_getxattr:1; |
92a8780e MS |
442 | |
443 | /** Is listxattr not implemented by fs? */ | |
1729a16c | 444 | unsigned no_listxattr:1; |
92a8780e MS |
445 | |
446 | /** Is removexattr not implemented by fs? */ | |
1729a16c | 447 | unsigned no_removexattr:1; |
92a8780e | 448 | |
71421259 | 449 | /** Are file locking primitives not implemented by fs? */ |
1729a16c | 450 | unsigned no_lock:1; |
71421259 | 451 | |
31d40d74 | 452 | /** Is access not implemented by fs? */ |
1729a16c | 453 | unsigned no_access:1; |
31d40d74 | 454 | |
fd72faac | 455 | /** Is create not implemented by fs? */ |
1729a16c | 456 | unsigned no_create:1; |
fd72faac | 457 | |
a4d27e75 | 458 | /** Is interrupt not implemented by fs? */ |
1729a16c | 459 | unsigned no_interrupt:1; |
a4d27e75 | 460 | |
b2d2272f | 461 | /** Is bmap not implemented by fs? */ |
1729a16c | 462 | unsigned no_bmap:1; |
b2d2272f | 463 | |
95668a69 TH |
464 | /** Is poll not implemented by fs? */ |
465 | unsigned no_poll:1; | |
466 | ||
78bb6cb9 | 467 | /** Do multi-page cached writes */ |
1729a16c | 468 | unsigned big_writes:1; |
78bb6cb9 | 469 | |
e0a43ddc MS |
470 | /** Don't apply umask to creation modes */ |
471 | unsigned dont_mask:1; | |
472 | ||
0cd5b885 MS |
473 | /** The number of requests waiting for completion */ |
474 | atomic_t num_waiting; | |
475 | ||
45714d65 MS |
476 | /** Negotiated minor version */ |
477 | unsigned minor; | |
478 | ||
d8a5ba45 MS |
479 | /** Backing dev info */ |
480 | struct backing_dev_info bdi; | |
f543f253 | 481 | |
bafa9654 MS |
482 | /** Entry on the fuse_conn_list */ |
483 | struct list_head entry; | |
484 | ||
b6f2fcbc MS |
485 | /** Device ID from super block */ |
486 | dev_t dev; | |
bafa9654 MS |
487 | |
488 | /** Dentries in the control filesystem */ | |
489 | struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; | |
490 | ||
491 | /** number of dentries used in the above array */ | |
492 | int ctl_ndents; | |
385a17bf JD |
493 | |
494 | /** O_ASYNC requests */ | |
495 | struct fasync_struct *fasync; | |
9c8ef561 MS |
496 | |
497 | /** Key for lock owner ID scrambling */ | |
498 | u32 scramble_key[4]; | |
0ec7ca41 MS |
499 | |
500 | /** Reserved request for the DESTROY message */ | |
501 | struct fuse_req *destroy_req; | |
1fb69e78 MS |
502 | |
503 | /** Version counter for attribute changes */ | |
504 | u64 attr_version; | |
43901aab TH |
505 | |
506 | /** Called on final put */ | |
507 | void (*release)(struct fuse_conn *); | |
3b463ae0 JM |
508 | |
509 | /** Super block for this connection. */ | |
510 | struct super_block *sb; | |
511 | ||
512 | /** Read/write semaphore to hold when accessing sb. */ | |
513 | struct rw_semaphore killsb; | |
d8a5ba45 MS |
514 | }; |
515 | ||
d8a5ba45 MS |
516 | static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) |
517 | { | |
6383bdaa | 518 | return sb->s_fs_info; |
d8a5ba45 MS |
519 | } |
520 | ||
521 | static inline struct fuse_conn *get_fuse_conn(struct inode *inode) | |
522 | { | |
523 | return get_fuse_conn_super(inode->i_sb); | |
524 | } | |
525 | ||
526 | static inline struct fuse_inode *get_fuse_inode(struct inode *inode) | |
527 | { | |
528 | return container_of(inode, struct fuse_inode, inode); | |
529 | } | |
530 | ||
531 | static inline u64 get_node_id(struct inode *inode) | |
532 | { | |
533 | return get_fuse_inode(inode)->nodeid; | |
534 | } | |
535 | ||
334f485d | 536 | /** Device operations */ |
4b6f5d20 | 537 | extern const struct file_operations fuse_dev_operations; |
334f485d | 538 | |
4269590a | 539 | extern const struct dentry_operations fuse_dentry_operations; |
dbd561d2 | 540 | |
3b463ae0 JM |
541 | /** |
542 | * Inode to nodeid comparison. | |
543 | */ | |
544 | int fuse_inode_eq(struct inode *inode, void *_nodeidp); | |
545 | ||
e5e5558e MS |
546 | /** |
547 | * Get a filled in inode | |
548 | */ | |
b48badf0 | 549 | struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
1fb69e78 MS |
550 | int generation, struct fuse_attr *attr, |
551 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 552 | |
33670fa2 MS |
553 | int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, |
554 | struct fuse_entry_out *outarg, struct inode **inode); | |
555 | ||
e5e5558e MS |
556 | /** |
557 | * Send FORGET command | |
558 | */ | |
07e77dca MS |
559 | void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, |
560 | u64 nodeid, u64 nlookup); | |
561 | ||
562 | struct fuse_forget_link *fuse_alloc_forget(void); | |
e5e5558e | 563 | |
04730fef | 564 | /** |
361b1eb5 | 565 | * Initialize READ or READDIR request |
04730fef | 566 | */ |
a6643094 | 567 | void fuse_read_fill(struct fuse_req *req, struct file *file, |
2106cb18 | 568 | loff_t pos, size_t count, int opcode); |
04730fef MS |
569 | |
570 | /** | |
571 | * Send OPEN or OPENDIR request | |
572 | */ | |
91fe96b4 | 573 | int fuse_open_common(struct inode *inode, struct file *file, bool isdir); |
04730fef | 574 | |
acf99433 | 575 | struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); |
c7b7143c | 576 | struct fuse_file *fuse_file_get(struct fuse_file *ff); |
fd72faac | 577 | void fuse_file_free(struct fuse_file *ff); |
c7b7143c | 578 | void fuse_finish_open(struct inode *inode, struct file *file); |
fd72faac | 579 | |
8b0797a4 | 580 | void fuse_sync_release(struct fuse_file *ff, int flags); |
c756e0a4 | 581 | |
04730fef MS |
582 | /** |
583 | * Send RELEASE or RELEASEDIR request | |
584 | */ | |
8b0797a4 | 585 | void fuse_release_common(struct file *file, int opcode); |
04730fef | 586 | |
82547981 MS |
587 | /** |
588 | * Send FSYNC or FSYNCDIR request | |
589 | */ | |
7ea80859 | 590 | int fuse_fsync_common(struct file *file, int datasync, int isdir); |
82547981 | 591 | |
95668a69 TH |
592 | /** |
593 | * Notify poll wakeup | |
594 | */ | |
595 | int fuse_notify_poll_wakeup(struct fuse_conn *fc, | |
596 | struct fuse_notify_poll_wakeup_out *outarg); | |
597 | ||
b6aeaded | 598 | /** |
1779381d | 599 | * Initialize file operations on a regular file |
b6aeaded MS |
600 | */ |
601 | void fuse_init_file_inode(struct inode *inode); | |
602 | ||
e5e5558e | 603 | /** |
1779381d | 604 | * Initialize inode operations on regular files and special files |
e5e5558e MS |
605 | */ |
606 | void fuse_init_common(struct inode *inode); | |
607 | ||
608 | /** | |
1779381d | 609 | * Initialize inode and file operations on a directory |
e5e5558e MS |
610 | */ |
611 | void fuse_init_dir(struct inode *inode); | |
612 | ||
613 | /** | |
1779381d | 614 | * Initialize inode operations on a symlink |
e5e5558e MS |
615 | */ |
616 | void fuse_init_symlink(struct inode *inode); | |
617 | ||
618 | /** | |
619 | * Change attributes of an inode | |
620 | */ | |
1fb69e78 MS |
621 | void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |
622 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 623 | |
3be5a52b MS |
624 | void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, |
625 | u64 attr_valid); | |
626 | ||
334f485d MS |
627 | /** |
628 | * Initialize the client device | |
629 | */ | |
630 | int fuse_dev_init(void); | |
631 | ||
632 | /** | |
633 | * Cleanup the client device | |
634 | */ | |
635 | void fuse_dev_cleanup(void); | |
636 | ||
bafa9654 MS |
637 | int fuse_ctl_init(void); |
638 | void fuse_ctl_cleanup(void); | |
639 | ||
334f485d MS |
640 | /** |
641 | * Allocate a request | |
642 | */ | |
643 | struct fuse_req *fuse_request_alloc(void); | |
644 | ||
3be5a52b MS |
645 | struct fuse_req *fuse_request_alloc_nofs(void); |
646 | ||
334f485d MS |
647 | /** |
648 | * Free a request | |
649 | */ | |
650 | void fuse_request_free(struct fuse_req *req); | |
651 | ||
334f485d | 652 | /** |
33649c91 | 653 | * Get a request, may fail with -ENOMEM |
334f485d | 654 | */ |
ce1d5a49 | 655 | struct fuse_req *fuse_get_req(struct fuse_conn *fc); |
334f485d | 656 | |
33649c91 MS |
657 | /** |
658 | * Gets a requests for a file operation, always succeeds | |
659 | */ | |
660 | struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file); | |
661 | ||
334f485d | 662 | /** |
ce1d5a49 MS |
663 | * Decrement reference count of a request. If count goes to zero free |
664 | * the request. | |
334f485d MS |
665 | */ |
666 | void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); | |
667 | ||
668 | /** | |
7c352bdf | 669 | * Send a request (synchronous) |
334f485d | 670 | */ |
b93f858a | 671 | void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 672 | |
334f485d MS |
673 | /** |
674 | * Send a request in the background | |
675 | */ | |
b93f858a | 676 | void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 677 | |
b93f858a TH |
678 | void fuse_request_send_background_locked(struct fuse_conn *fc, |
679 | struct fuse_req *req); | |
3be5a52b | 680 | |
5a5fb1ea | 681 | /* Abort all requests */ |
69a53bf2 MS |
682 | void fuse_abort_conn(struct fuse_conn *fc); |
683 | ||
e5e5558e MS |
684 | /** |
685 | * Invalidate inode attributes | |
686 | */ | |
687 | void fuse_invalidate_attr(struct inode *inode); | |
bafa9654 | 688 | |
dbd561d2 MS |
689 | void fuse_invalidate_entry_cache(struct dentry *entry); |
690 | ||
bafa9654 MS |
691 | /** |
692 | * Acquire reference to fuse_conn | |
693 | */ | |
694 | struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); | |
695 | ||
08cbf542 TH |
696 | void fuse_conn_kill(struct fuse_conn *fc); |
697 | ||
0d179aa5 TH |
698 | /** |
699 | * Initialize fuse_conn | |
700 | */ | |
a325f9b9 | 701 | void fuse_conn_init(struct fuse_conn *fc); |
0d179aa5 | 702 | |
bafa9654 MS |
703 | /** |
704 | * Release reference to fuse_conn | |
705 | */ | |
706 | void fuse_conn_put(struct fuse_conn *fc); | |
707 | ||
708 | /** | |
709 | * Add connection to control filesystem | |
710 | */ | |
711 | int fuse_ctl_add_conn(struct fuse_conn *fc); | |
712 | ||
713 | /** | |
714 | * Remove connection from control filesystem | |
715 | */ | |
716 | void fuse_ctl_remove_conn(struct fuse_conn *fc); | |
a5bfffac TS |
717 | |
718 | /** | |
719 | * Is file type valid? | |
720 | */ | |
721 | int fuse_valid_type(int m); | |
e57ac683 MS |
722 | |
723 | /** | |
724 | * Is task allowed to perform filesystem operation? | |
725 | */ | |
726 | int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); | |
f3332114 MS |
727 | |
728 | u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); | |
bcb4be80 MS |
729 | |
730 | int fuse_update_attributes(struct inode *inode, struct kstat *stat, | |
731 | struct file *file, bool *refreshed); | |
3be5a52b MS |
732 | |
733 | void fuse_flush_writepages(struct inode *inode); | |
734 | ||
735 | void fuse_set_nowrite(struct inode *inode); | |
736 | void fuse_release_nowrite(struct inode *inode); | |
5c5c5e51 MS |
737 | |
738 | u64 fuse_get_attr_version(struct fuse_conn *fc); | |
29d434b3 | 739 | |
3b463ae0 JM |
740 | /** |
741 | * File-system tells the kernel to invalidate cache for the given node id. | |
742 | */ | |
743 | int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, | |
744 | loff_t offset, loff_t len); | |
745 | ||
746 | /** | |
747 | * File-system tells the kernel to invalidate parent attributes and | |
748 | * the dentry matching parent/name. | |
749 | */ | |
750 | int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, | |
751 | struct qstr *name); | |
752 | ||
08cbf542 TH |
753 | int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, |
754 | bool isdir); | |
755 | ssize_t fuse_direct_io(struct file *file, const char __user *buf, | |
756 | size_t count, loff_t *ppos, int write); | |
757 | long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, | |
758 | unsigned int flags); | |
759 | unsigned fuse_file_poll(struct file *file, poll_table *wait); | |
760 | int fuse_dev_release(struct inode *inode, struct file *file); | |
761 | ||
a1d75f25 MS |
762 | void fuse_write_update_size(struct inode *inode, loff_t pos); |
763 | ||
29d434b3 | 764 | #endif /* _FS_FUSE_I_H */ |