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