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