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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 | ||
08a53cdc | 28 | /** Maximum number of outstanding background requests */ |
f92b99b9 MS |
29 | #define FUSE_MAX_BACKGROUND 12 |
30 | ||
31 | /** Congestion starts at 75% of maximum */ | |
32 | #define FUSE_CONGESTION_THRESHOLD (FUSE_MAX_BACKGROUND * 75 / 100) | |
08a53cdc | 33 | |
3be5a52b MS |
34 | /** Bias for fi->writectr, meaning new writepages must not be sent */ |
35 | #define FUSE_NOWRITE INT_MIN | |
36 | ||
1d3d752b MS |
37 | /** It could be as large as PATH_MAX, but would that have any uses? */ |
38 | #define FUSE_NAME_MAX 1024 | |
39 | ||
bafa9654 MS |
40 | /** Number of dentries for each connection in the control filesystem */ |
41 | #define FUSE_CTL_NUM_DENTRIES 3 | |
42 | ||
1e9a4ed9 MS |
43 | /** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem |
44 | module will check permissions based on the file mode. Otherwise no | |
45 | permission checking is done in the kernel */ | |
46 | #define FUSE_DEFAULT_PERMISSIONS (1 << 0) | |
47 | ||
48 | /** If the FUSE_ALLOW_OTHER flag is given, then not only the user | |
49 | doing the mount will be allowed to access the filesystem */ | |
50 | #define FUSE_ALLOW_OTHER (1 << 1) | |
51 | ||
bafa9654 MS |
52 | /** List of active connections */ |
53 | extern struct list_head fuse_conn_list; | |
54 | ||
55 | /** Global mutex protecting fuse_conn_list and the control filesystem */ | |
56 | extern struct mutex fuse_mutex; | |
413ef8cb | 57 | |
d8a5ba45 MS |
58 | /** FUSE inode */ |
59 | struct fuse_inode { | |
60 | /** Inode data */ | |
61 | struct inode inode; | |
62 | ||
63 | /** Unique ID, which identifies the inode between userspace | |
64 | * and kernel */ | |
65 | u64 nodeid; | |
66 | ||
9e6268db MS |
67 | /** Number of lookups on this inode */ |
68 | u64 nlookup; | |
69 | ||
e5e5558e MS |
70 | /** The request used for sending the FORGET message */ |
71 | struct fuse_req *forget_req; | |
72 | ||
d8a5ba45 | 73 | /** Time in jiffies until the file attributes are valid */ |
0a0898cf | 74 | u64 i_time; |
ebc14c4d MS |
75 | |
76 | /** The sticky bit in inode->i_mode may have been removed, so | |
77 | preserve the original mode */ | |
78 | mode_t orig_i_mode; | |
1fb69e78 MS |
79 | |
80 | /** Version of last attribute change */ | |
81 | u64 attr_version; | |
93a8c3cd MS |
82 | |
83 | /** Files usable in writepage. Protected by fc->lock */ | |
84 | struct list_head write_files; | |
3be5a52b MS |
85 | |
86 | /** Writepages pending on truncate or fsync */ | |
87 | struct list_head queued_writes; | |
88 | ||
89 | /** Number of sent writes, a negative bias (FUSE_NOWRITE) | |
90 | * means more writes are blocked */ | |
91 | int writectr; | |
92 | ||
93 | /** Waitq for writepage completion */ | |
94 | wait_queue_head_t page_waitq; | |
95 | ||
96 | /** List of writepage requestst (pending or sent) */ | |
97 | struct list_head writepages; | |
d8a5ba45 MS |
98 | }; |
99 | ||
b6aeaded MS |
100 | /** FUSE specific file data */ |
101 | struct fuse_file { | |
102 | /** Request reserved for flush and release */ | |
33649c91 | 103 | struct fuse_req *reserved_req; |
b6aeaded | 104 | |
acf99433 TH |
105 | /** Kernel file handle guaranteed to be unique */ |
106 | u64 kh; | |
107 | ||
b6aeaded MS |
108 | /** File handle used by userspace */ |
109 | u64 fh; | |
c756e0a4 MS |
110 | |
111 | /** Refcount */ | |
112 | atomic_t count; | |
93a8c3cd MS |
113 | |
114 | /** Entry on inode's write_files list */ | |
115 | struct list_head write_entry; | |
95668a69 TH |
116 | |
117 | /** RB node to be linked on fuse_conn->polled_files */ | |
118 | struct rb_node polled_node; | |
119 | ||
120 | /** Wait queue head for poll */ | |
121 | wait_queue_head_t poll_wait; | |
b6aeaded MS |
122 | }; |
123 | ||
334f485d MS |
124 | /** One input argument of a request */ |
125 | struct fuse_in_arg { | |
126 | unsigned size; | |
127 | const void *value; | |
128 | }; | |
129 | ||
130 | /** The request input */ | |
131 | struct fuse_in { | |
132 | /** The request header */ | |
133 | struct fuse_in_header h; | |
134 | ||
135 | /** True if the data for the last argument is in req->pages */ | |
136 | unsigned argpages:1; | |
137 | ||
138 | /** Number of arguments */ | |
139 | unsigned numargs; | |
140 | ||
141 | /** Array of arguments */ | |
142 | struct fuse_in_arg args[3]; | |
143 | }; | |
144 | ||
145 | /** One output argument of a request */ | |
146 | struct fuse_arg { | |
147 | unsigned size; | |
148 | void *value; | |
149 | }; | |
150 | ||
151 | /** The request output */ | |
152 | struct fuse_out { | |
153 | /** Header returned from userspace */ | |
154 | struct fuse_out_header h; | |
155 | ||
095da6cb MS |
156 | /* |
157 | * The following bitfields are not changed during the request | |
158 | * processing | |
159 | */ | |
160 | ||
334f485d MS |
161 | /** Last argument is variable length (can be shorter than |
162 | arg->size) */ | |
163 | unsigned argvar:1; | |
164 | ||
165 | /** Last argument is a list of pages to copy data to */ | |
166 | unsigned argpages:1; | |
167 | ||
168 | /** Zero partially or not copied pages */ | |
169 | unsigned page_zeroing:1; | |
170 | ||
171 | /** Number or arguments */ | |
172 | unsigned numargs; | |
173 | ||
174 | /** Array of arguments */ | |
175 | struct fuse_arg args[3]; | |
176 | }; | |
177 | ||
83cfd493 MS |
178 | /** The request state */ |
179 | enum fuse_req_state { | |
180 | FUSE_REQ_INIT = 0, | |
181 | FUSE_REQ_PENDING, | |
182 | FUSE_REQ_READING, | |
183 | FUSE_REQ_SENT, | |
a4d27e75 | 184 | FUSE_REQ_WRITING, |
83cfd493 MS |
185 | FUSE_REQ_FINISHED |
186 | }; | |
187 | ||
64c6d8ed MS |
188 | struct fuse_conn; |
189 | ||
334f485d MS |
190 | /** |
191 | * A request to the client | |
192 | */ | |
193 | struct fuse_req { | |
ce1d5a49 MS |
194 | /** This can be on either pending processing or io lists in |
195 | fuse_conn */ | |
334f485d MS |
196 | struct list_head list; |
197 | ||
a4d27e75 MS |
198 | /** Entry on the interrupts list */ |
199 | struct list_head intr_entry; | |
200 | ||
334f485d MS |
201 | /** refcount */ |
202 | atomic_t count; | |
203 | ||
a4d27e75 MS |
204 | /** Unique ID for the interrupt request */ |
205 | u64 intr_unique; | |
206 | ||
095da6cb MS |
207 | /* |
208 | * The following bitfields are either set once before the | |
209 | * request is queued or setting/clearing them is protected by | |
d7133114 | 210 | * fuse_conn->lock |
095da6cb MS |
211 | */ |
212 | ||
334f485d MS |
213 | /** True if the request has reply */ |
214 | unsigned isreply:1; | |
215 | ||
51eb01e7 MS |
216 | /** Force sending of the request even if interrupted */ |
217 | unsigned force:1; | |
218 | ||
f9a2842e MS |
219 | /** The request was aborted */ |
220 | unsigned aborted:1; | |
334f485d MS |
221 | |
222 | /** Request is sent in the background */ | |
223 | unsigned background:1; | |
224 | ||
a4d27e75 MS |
225 | /** The request has been interrupted */ |
226 | unsigned interrupted:1; | |
227 | ||
334f485d MS |
228 | /** Data is being copied to/from the request */ |
229 | unsigned locked:1; | |
230 | ||
9bc5ddda MS |
231 | /** Request is counted as "waiting" */ |
232 | unsigned waiting:1; | |
233 | ||
83cfd493 MS |
234 | /** State of the request */ |
235 | enum fuse_req_state state; | |
334f485d MS |
236 | |
237 | /** The request input */ | |
238 | struct fuse_in in; | |
239 | ||
240 | /** The request output */ | |
241 | struct fuse_out out; | |
242 | ||
243 | /** Used to wake up the task waiting for completion of request*/ | |
244 | wait_queue_head_t waitq; | |
245 | ||
246 | /** Data for asynchronous requests */ | |
247 | union { | |
e5e5558e | 248 | struct fuse_forget_in forget_in; |
b57d4264 MS |
249 | struct { |
250 | struct fuse_release_in in; | |
b0be46eb | 251 | struct path path; |
b57d4264 | 252 | } release; |
3ec870d5 MS |
253 | struct fuse_init_in init_in; |
254 | struct fuse_init_out init_out; | |
5c5c5e51 MS |
255 | struct { |
256 | struct fuse_read_in in; | |
257 | u64 attr_ver; | |
258 | } read; | |
b25e82e5 MS |
259 | struct { |
260 | struct fuse_write_in in; | |
261 | struct fuse_write_out out; | |
262 | } write; | |
71421259 | 263 | struct fuse_lk_in lk_in; |
334f485d MS |
264 | } misc; |
265 | ||
266 | /** page vector */ | |
267 | struct page *pages[FUSE_MAX_PAGES_PER_REQ]; | |
268 | ||
269 | /** number of pages in vector */ | |
270 | unsigned num_pages; | |
271 | ||
272 | /** offset of data on first page */ | |
273 | unsigned page_offset; | |
274 | ||
334f485d | 275 | /** File used in the request (or NULL) */ |
c756e0a4 | 276 | struct fuse_file *ff; |
64c6d8ed | 277 | |
3be5a52b MS |
278 | /** Inode used in the request or NULL */ |
279 | struct inode *inode; | |
280 | ||
281 | /** Link on fi->writepages */ | |
282 | struct list_head writepages_entry; | |
283 | ||
64c6d8ed MS |
284 | /** Request completion callback */ |
285 | void (*end)(struct fuse_conn *, struct fuse_req *); | |
33649c91 MS |
286 | |
287 | /** Request is stolen from fuse_file->reserved_req */ | |
288 | struct file *stolen_file; | |
334f485d MS |
289 | }; |
290 | ||
d8a5ba45 MS |
291 | /** |
292 | * A Fuse connection. | |
293 | * | |
294 | * This structure is created, when the filesystem is mounted, and is | |
295 | * destroyed, when the client device is closed and the filesystem is | |
296 | * unmounted. | |
297 | */ | |
298 | struct fuse_conn { | |
d7133114 MS |
299 | /** Lock protecting accessess to members of this structure */ |
300 | spinlock_t lock; | |
301 | ||
d2a85164 MS |
302 | /** Mutex protecting against directory alias creation */ |
303 | struct mutex inst_mutex; | |
304 | ||
bafa9654 MS |
305 | /** Refcount */ |
306 | atomic_t count; | |
307 | ||
d8a5ba45 MS |
308 | /** The user id for this mount */ |
309 | uid_t user_id; | |
310 | ||
87729a55 MS |
311 | /** The group id for this mount */ |
312 | gid_t group_id; | |
313 | ||
1e9a4ed9 MS |
314 | /** The fuse mount flags for this mount */ |
315 | unsigned flags; | |
316 | ||
db50b96c MS |
317 | /** Maximum read size */ |
318 | unsigned max_read; | |
319 | ||
413ef8cb MS |
320 | /** Maximum write size */ |
321 | unsigned max_write; | |
322 | ||
334f485d MS |
323 | /** Readers of the connection are waiting on this */ |
324 | wait_queue_head_t waitq; | |
325 | ||
326 | /** The list of pending requests */ | |
327 | struct list_head pending; | |
328 | ||
329 | /** The list of requests being processed */ | |
330 | struct list_head processing; | |
331 | ||
d77a1d5b MS |
332 | /** The list of requests under I/O */ |
333 | struct list_head io; | |
334 | ||
acf99433 TH |
335 | /** The next unique kernel file handle */ |
336 | u64 khctr; | |
337 | ||
95668a69 TH |
338 | /** rbtree of fuse_files waiting for poll events indexed by ph */ |
339 | struct rb_root polled_files; | |
340 | ||
08a53cdc MS |
341 | /** Number of requests currently in the background */ |
342 | unsigned num_background; | |
343 | ||
d12def1b MS |
344 | /** Number of background requests currently queued for userspace */ |
345 | unsigned active_background; | |
346 | ||
347 | /** The list of background requests set aside for later queuing */ | |
348 | struct list_head bg_queue; | |
349 | ||
a4d27e75 MS |
350 | /** Pending interrupts */ |
351 | struct list_head interrupts; | |
352 | ||
08a53cdc MS |
353 | /** Flag indicating if connection is blocked. This will be |
354 | the case before the INIT reply is received, and if there | |
355 | are too many outstading backgrounds requests */ | |
356 | int blocked; | |
357 | ||
358 | /** waitq for blocked connection */ | |
359 | wait_queue_head_t blocked_waitq; | |
de5e3dec MS |
360 | |
361 | /** waitq for reserved requests */ | |
362 | wait_queue_head_t reserved_req_waitq; | |
08a53cdc | 363 | |
334f485d MS |
364 | /** The next unique request id */ |
365 | u64 reqctr; | |
366 | ||
69a53bf2 MS |
367 | /** Connection established, cleared on umount, connection |
368 | abort and device release */ | |
095da6cb | 369 | unsigned connected; |
1e9a4ed9 | 370 | |
095da6cb MS |
371 | /** Connection failed (version mismatch). Cannot race with |
372 | setting other bitfields since it is only set once in INIT | |
373 | reply, before any other request, and never cleared */ | |
1729a16c | 374 | unsigned conn_error:1; |
334f485d | 375 | |
0ec7ca41 | 376 | /** Connection successful. Only set in INIT */ |
1729a16c | 377 | unsigned conn_init:1; |
0ec7ca41 | 378 | |
9cd68455 | 379 | /** Do readpages asynchronously? Only set in INIT */ |
1729a16c | 380 | unsigned async_read:1; |
9cd68455 | 381 | |
6ff958ed | 382 | /** Do not send separate SETATTR request before open(O_TRUNC) */ |
1729a16c | 383 | unsigned atomic_o_trunc:1; |
6ff958ed | 384 | |
33670fa2 | 385 | /** Filesystem supports NFS exporting. Only set in INIT */ |
1729a16c | 386 | unsigned export_support:1; |
33670fa2 | 387 | |
095da6cb MS |
388 | /* |
389 | * The following bitfields are only for optimization purposes | |
390 | * and hence races in setting them will not cause malfunction | |
391 | */ | |
392 | ||
b6aeaded | 393 | /** Is fsync not implemented by fs? */ |
1729a16c | 394 | unsigned no_fsync:1; |
b6aeaded | 395 | |
82547981 | 396 | /** Is fsyncdir not implemented by fs? */ |
1729a16c | 397 | unsigned no_fsyncdir:1; |
82547981 | 398 | |
b6aeaded | 399 | /** Is flush not implemented by fs? */ |
1729a16c | 400 | unsigned no_flush:1; |
b6aeaded | 401 | |
92a8780e | 402 | /** Is setxattr not implemented by fs? */ |
1729a16c | 403 | unsigned no_setxattr:1; |
92a8780e MS |
404 | |
405 | /** Is getxattr not implemented by fs? */ | |
1729a16c | 406 | unsigned no_getxattr:1; |
92a8780e MS |
407 | |
408 | /** Is listxattr not implemented by fs? */ | |
1729a16c | 409 | unsigned no_listxattr:1; |
92a8780e MS |
410 | |
411 | /** Is removexattr not implemented by fs? */ | |
1729a16c | 412 | unsigned no_removexattr:1; |
92a8780e | 413 | |
71421259 | 414 | /** Are file locking primitives not implemented by fs? */ |
1729a16c | 415 | unsigned no_lock:1; |
71421259 | 416 | |
31d40d74 | 417 | /** Is access not implemented by fs? */ |
1729a16c | 418 | unsigned no_access:1; |
31d40d74 | 419 | |
fd72faac | 420 | /** Is create not implemented by fs? */ |
1729a16c | 421 | unsigned no_create:1; |
fd72faac | 422 | |
a4d27e75 | 423 | /** Is interrupt not implemented by fs? */ |
1729a16c | 424 | unsigned no_interrupt:1; |
a4d27e75 | 425 | |
b2d2272f | 426 | /** Is bmap not implemented by fs? */ |
1729a16c | 427 | unsigned no_bmap:1; |
b2d2272f | 428 | |
95668a69 TH |
429 | /** Is poll not implemented by fs? */ |
430 | unsigned no_poll:1; | |
431 | ||
78bb6cb9 | 432 | /** Do multi-page cached writes */ |
1729a16c | 433 | unsigned big_writes:1; |
78bb6cb9 | 434 | |
0cd5b885 MS |
435 | /** The number of requests waiting for completion */ |
436 | atomic_t num_waiting; | |
437 | ||
45714d65 MS |
438 | /** Negotiated minor version */ |
439 | unsigned minor; | |
440 | ||
d8a5ba45 MS |
441 | /** Backing dev info */ |
442 | struct backing_dev_info bdi; | |
f543f253 | 443 | |
bafa9654 MS |
444 | /** Entry on the fuse_conn_list */ |
445 | struct list_head entry; | |
446 | ||
b6f2fcbc MS |
447 | /** Device ID from super block */ |
448 | dev_t dev; | |
bafa9654 MS |
449 | |
450 | /** Dentries in the control filesystem */ | |
451 | struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; | |
452 | ||
453 | /** number of dentries used in the above array */ | |
454 | int ctl_ndents; | |
385a17bf JD |
455 | |
456 | /** O_ASYNC requests */ | |
457 | struct fasync_struct *fasync; | |
9c8ef561 MS |
458 | |
459 | /** Key for lock owner ID scrambling */ | |
460 | u32 scramble_key[4]; | |
0ec7ca41 MS |
461 | |
462 | /** Reserved request for the DESTROY message */ | |
463 | struct fuse_req *destroy_req; | |
1fb69e78 MS |
464 | |
465 | /** Version counter for attribute changes */ | |
466 | u64 attr_version; | |
43901aab TH |
467 | |
468 | /** Called on final put */ | |
469 | void (*release)(struct fuse_conn *); | |
d8a5ba45 MS |
470 | }; |
471 | ||
d8a5ba45 MS |
472 | static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) |
473 | { | |
6383bdaa | 474 | return sb->s_fs_info; |
d8a5ba45 MS |
475 | } |
476 | ||
477 | static inline struct fuse_conn *get_fuse_conn(struct inode *inode) | |
478 | { | |
479 | return get_fuse_conn_super(inode->i_sb); | |
480 | } | |
481 | ||
482 | static inline struct fuse_inode *get_fuse_inode(struct inode *inode) | |
483 | { | |
484 | return container_of(inode, struct fuse_inode, inode); | |
485 | } | |
486 | ||
487 | static inline u64 get_node_id(struct inode *inode) | |
488 | { | |
489 | return get_fuse_inode(inode)->nodeid; | |
490 | } | |
491 | ||
334f485d | 492 | /** Device operations */ |
4b6f5d20 | 493 | extern const struct file_operations fuse_dev_operations; |
334f485d | 494 | |
4269590a | 495 | extern const struct dentry_operations fuse_dentry_operations; |
dbd561d2 | 496 | |
e5e5558e MS |
497 | /** |
498 | * Get a filled in inode | |
499 | */ | |
b48badf0 | 500 | struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
1fb69e78 MS |
501 | int generation, struct fuse_attr *attr, |
502 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 503 | |
33670fa2 MS |
504 | int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, |
505 | struct fuse_entry_out *outarg, struct inode **inode); | |
506 | ||
e5e5558e MS |
507 | /** |
508 | * Send FORGET command | |
509 | */ | |
510 | void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, | |
b48badf0 | 511 | u64 nodeid, u64 nlookup); |
e5e5558e | 512 | |
04730fef | 513 | /** |
361b1eb5 | 514 | * Initialize READ or READDIR request |
04730fef | 515 | */ |
a6643094 | 516 | void fuse_read_fill(struct fuse_req *req, struct file *file, |
361b1eb5 | 517 | struct inode *inode, loff_t pos, size_t count, int opcode); |
04730fef MS |
518 | |
519 | /** | |
520 | * Send OPEN or OPENDIR request | |
521 | */ | |
522 | int fuse_open_common(struct inode *inode, struct file *file, int isdir); | |
523 | ||
acf99433 | 524 | struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); |
fd72faac MS |
525 | void fuse_file_free(struct fuse_file *ff); |
526 | void fuse_finish_open(struct inode *inode, struct file *file, | |
527 | struct fuse_file *ff, struct fuse_open_out *outarg); | |
528 | ||
c756e0a4 MS |
529 | /** Fill in ff->reserved_req with a RELEASE request */ |
530 | void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode); | |
531 | ||
04730fef MS |
532 | /** |
533 | * Send RELEASE or RELEASEDIR request | |
534 | */ | |
535 | int fuse_release_common(struct inode *inode, struct file *file, int isdir); | |
536 | ||
82547981 MS |
537 | /** |
538 | * Send FSYNC or FSYNCDIR request | |
539 | */ | |
540 | int fuse_fsync_common(struct file *file, struct dentry *de, int datasync, | |
541 | int isdir); | |
542 | ||
95668a69 TH |
543 | /** |
544 | * Notify poll wakeup | |
545 | */ | |
546 | int fuse_notify_poll_wakeup(struct fuse_conn *fc, | |
547 | struct fuse_notify_poll_wakeup_out *outarg); | |
548 | ||
b6aeaded | 549 | /** |
1779381d | 550 | * Initialize file operations on a regular file |
b6aeaded MS |
551 | */ |
552 | void fuse_init_file_inode(struct inode *inode); | |
553 | ||
e5e5558e | 554 | /** |
1779381d | 555 | * Initialize inode operations on regular files and special files |
e5e5558e MS |
556 | */ |
557 | void fuse_init_common(struct inode *inode); | |
558 | ||
559 | /** | |
1779381d | 560 | * Initialize inode and file operations on a directory |
e5e5558e MS |
561 | */ |
562 | void fuse_init_dir(struct inode *inode); | |
563 | ||
564 | /** | |
1779381d | 565 | * Initialize inode operations on a symlink |
e5e5558e MS |
566 | */ |
567 | void fuse_init_symlink(struct inode *inode); | |
568 | ||
569 | /** | |
570 | * Change attributes of an inode | |
571 | */ | |
1fb69e78 MS |
572 | void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |
573 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 574 | |
3be5a52b MS |
575 | void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, |
576 | u64 attr_valid); | |
577 | ||
578 | void fuse_truncate(struct address_space *mapping, loff_t offset); | |
579 | ||
334f485d MS |
580 | /** |
581 | * Initialize the client device | |
582 | */ | |
583 | int fuse_dev_init(void); | |
584 | ||
585 | /** | |
586 | * Cleanup the client device | |
587 | */ | |
588 | void fuse_dev_cleanup(void); | |
589 | ||
bafa9654 MS |
590 | int fuse_ctl_init(void); |
591 | void fuse_ctl_cleanup(void); | |
592 | ||
334f485d MS |
593 | /** |
594 | * Allocate a request | |
595 | */ | |
596 | struct fuse_req *fuse_request_alloc(void); | |
597 | ||
3be5a52b MS |
598 | struct fuse_req *fuse_request_alloc_nofs(void); |
599 | ||
334f485d MS |
600 | /** |
601 | * Free a request | |
602 | */ | |
603 | void fuse_request_free(struct fuse_req *req); | |
604 | ||
334f485d | 605 | /** |
33649c91 | 606 | * Get a request, may fail with -ENOMEM |
334f485d | 607 | */ |
ce1d5a49 | 608 | struct fuse_req *fuse_get_req(struct fuse_conn *fc); |
334f485d | 609 | |
33649c91 MS |
610 | /** |
611 | * Gets a requests for a file operation, always succeeds | |
612 | */ | |
613 | struct fuse_req *fuse_get_req_nofail(struct fuse_conn *fc, struct file *file); | |
614 | ||
334f485d | 615 | /** |
ce1d5a49 MS |
616 | * Decrement reference count of a request. If count goes to zero free |
617 | * the request. | |
334f485d MS |
618 | */ |
619 | void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); | |
620 | ||
621 | /** | |
7c352bdf | 622 | * Send a request (synchronous) |
334f485d | 623 | */ |
b93f858a | 624 | void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 625 | |
334f485d MS |
626 | /** |
627 | * Send a request with no reply | |
628 | */ | |
b93f858a | 629 | void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req); |
334f485d MS |
630 | |
631 | /** | |
632 | * Send a request in the background | |
633 | */ | |
b93f858a | 634 | void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req); |
334f485d | 635 | |
b93f858a TH |
636 | void fuse_request_send_background_locked(struct fuse_conn *fc, |
637 | struct fuse_req *req); | |
3be5a52b | 638 | |
5a5fb1ea | 639 | /* Abort all requests */ |
69a53bf2 MS |
640 | void fuse_abort_conn(struct fuse_conn *fc); |
641 | ||
e5e5558e MS |
642 | /** |
643 | * Invalidate inode attributes | |
644 | */ | |
645 | void fuse_invalidate_attr(struct inode *inode); | |
bafa9654 | 646 | |
dbd561d2 MS |
647 | void fuse_invalidate_entry_cache(struct dentry *entry); |
648 | ||
bafa9654 MS |
649 | /** |
650 | * Acquire reference to fuse_conn | |
651 | */ | |
652 | struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); | |
653 | ||
0d179aa5 TH |
654 | /** |
655 | * Initialize fuse_conn | |
656 | */ | |
657 | int fuse_conn_init(struct fuse_conn *fc, struct super_block *sb); | |
658 | ||
bafa9654 MS |
659 | /** |
660 | * Release reference to fuse_conn | |
661 | */ | |
662 | void fuse_conn_put(struct fuse_conn *fc); | |
663 | ||
664 | /** | |
665 | * Add connection to control filesystem | |
666 | */ | |
667 | int fuse_ctl_add_conn(struct fuse_conn *fc); | |
668 | ||
669 | /** | |
670 | * Remove connection from control filesystem | |
671 | */ | |
672 | void fuse_ctl_remove_conn(struct fuse_conn *fc); | |
a5bfffac TS |
673 | |
674 | /** | |
675 | * Is file type valid? | |
676 | */ | |
677 | int fuse_valid_type(int m); | |
e57ac683 MS |
678 | |
679 | /** | |
680 | * Is task allowed to perform filesystem operation? | |
681 | */ | |
682 | int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); | |
f3332114 MS |
683 | |
684 | u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); | |
bcb4be80 MS |
685 | |
686 | int fuse_update_attributes(struct inode *inode, struct kstat *stat, | |
687 | struct file *file, bool *refreshed); | |
3be5a52b MS |
688 | |
689 | void fuse_flush_writepages(struct inode *inode); | |
690 | ||
691 | void fuse_set_nowrite(struct inode *inode); | |
692 | void fuse_release_nowrite(struct inode *inode); | |
5c5c5e51 MS |
693 | |
694 | u64 fuse_get_attr_version(struct fuse_conn *fc); | |
29d434b3 TH |
695 | |
696 | #endif /* _FS_FUSE_I_H */ |