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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 | ||
f2294482 KS |
12 | #ifndef pr_fmt |
13 | # define pr_fmt(fmt) "fuse: " fmt | |
14 | #endif | |
15 | ||
d8a5ba45 MS |
16 | #include <linux/fuse.h> |
17 | #include <linux/fs.h> | |
51eb01e7 | 18 | #include <linux/mount.h> |
d8a5ba45 MS |
19 | #include <linux/wait.h> |
20 | #include <linux/list.h> | |
21 | #include <linux/spinlock.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/backing-dev.h> | |
bafa9654 | 24 | #include <linux/mutex.h> |
3be5a52b | 25 | #include <linux/rwsem.h> |
95668a69 TH |
26 | #include <linux/rbtree.h> |
27 | #include <linux/poll.h> | |
5a18ec17 | 28 | #include <linux/workqueue.h> |
744742d6 | 29 | #include <linux/kref.h> |
60bcc88a | 30 | #include <linux/xattr.h> |
0b6e9ea0 | 31 | #include <linux/pid_namespace.h> |
4e8c2eb5 | 32 | #include <linux/refcount.h> |
8cb08329 | 33 | #include <linux/user_namespace.h> |
d8a5ba45 | 34 | |
5da784cc CS |
35 | /** Default max number of pages that can be used in a single read request */ |
36 | #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32 | |
37 | ||
38 | /** Maximum of max_pages received in init_out */ | |
39 | #define FUSE_MAX_MAX_PAGES 256 | |
334f485d | 40 | |
3be5a52b MS |
41 | /** Bias for fi->writectr, meaning new writepages must not be sent */ |
42 | #define FUSE_NOWRITE INT_MIN | |
43 | ||
1d3d752b MS |
44 | /** It could be as large as PATH_MAX, but would that have any uses? */ |
45 | #define FUSE_NAME_MAX 1024 | |
46 | ||
bafa9654 | 47 | /** Number of dentries for each connection in the control filesystem */ |
79a9d994 | 48 | #define FUSE_CTL_NUM_DENTRIES 5 |
bafa9654 | 49 | |
bafa9654 MS |
50 | /** List of active connections */ |
51 | extern struct list_head fuse_conn_list; | |
52 | ||
53 | /** Global mutex protecting fuse_conn_list and the control filesystem */ | |
54 | extern struct mutex fuse_mutex; | |
413ef8cb | 55 | |
79a9d994 CH |
56 | /** Module parameters */ |
57 | extern unsigned max_user_bgreq; | |
58 | extern unsigned max_user_congthresh; | |
59 | ||
07e77dca MS |
60 | /* One forget request */ |
61 | struct fuse_forget_link { | |
02c048b9 | 62 | struct fuse_forget_one forget_one; |
07e77dca MS |
63 | struct fuse_forget_link *next; |
64 | }; | |
65 | ||
d8a5ba45 MS |
66 | /** FUSE inode */ |
67 | struct fuse_inode { | |
68 | /** Inode data */ | |
69 | struct inode inode; | |
70 | ||
71 | /** Unique ID, which identifies the inode between userspace | |
72 | * and kernel */ | |
73 | u64 nodeid; | |
74 | ||
9e6268db MS |
75 | /** Number of lookups on this inode */ |
76 | u64 nlookup; | |
77 | ||
e5e5558e | 78 | /** The request used for sending the FORGET message */ |
07e77dca | 79 | struct fuse_forget_link *forget; |
e5e5558e | 80 | |
d8a5ba45 | 81 | /** Time in jiffies until the file attributes are valid */ |
0a0898cf | 82 | u64 i_time; |
ebc14c4d | 83 | |
2f1e8196 MS |
84 | /* Which attributes are invalid */ |
85 | u32 inval_mask; | |
86 | ||
ebc14c4d MS |
87 | /** The sticky bit in inode->i_mode may have been removed, so |
88 | preserve the original mode */ | |
541af6a0 | 89 | umode_t orig_i_mode; |
1fb69e78 | 90 | |
45c72cd7 PS |
91 | /** 64 bit inode number */ |
92 | u64 orig_ino; | |
93 | ||
1fb69e78 MS |
94 | /** Version of last attribute change */ |
95 | u64 attr_version; | |
93a8c3cd | 96 | |
ab2257e9 MS |
97 | union { |
98 | /* Write related fields (regular file only) */ | |
99 | struct { | |
f15ecfef | 100 | /* Files usable in writepage. Protected by fi->lock */ |
ab2257e9 | 101 | struct list_head write_files; |
3be5a52b | 102 | |
ab2257e9 MS |
103 | /* Writepages pending on truncate or fsync */ |
104 | struct list_head queued_writes; | |
3be5a52b | 105 | |
ab2257e9 MS |
106 | /* Number of sent writes, a negative bias |
107 | * (FUSE_NOWRITE) means more writes are blocked */ | |
108 | int writectr; | |
3be5a52b | 109 | |
ab2257e9 MS |
110 | /* Waitq for writepage completion */ |
111 | wait_queue_head_t page_waitq; | |
3be5a52b | 112 | |
ab2257e9 | 113 | /* List of writepage requestst (pending or sent) */ |
6b2fb799 | 114 | struct rb_root writepages; |
ab2257e9 | 115 | }; |
4582a4ab | 116 | |
ab2257e9 MS |
117 | /* readdir cache (directory only) */ |
118 | struct { | |
119 | /* true if fully cached */ | |
120 | bool cached; | |
69e34551 | 121 | |
ab2257e9 MS |
122 | /* size of cache */ |
123 | loff_t size; | |
69e34551 | 124 | |
ab2257e9 MS |
125 | /* position at end of cache (position of next entry) */ |
126 | loff_t pos; | |
69e34551 | 127 | |
ab2257e9 MS |
128 | /* version of the cache */ |
129 | u64 version; | |
3494927e | 130 | |
ab2257e9 MS |
131 | /* modification time of directory when cache was |
132 | * started */ | |
133 | struct timespec64 mtime; | |
7118883b | 134 | |
ab2257e9 MS |
135 | /* iversion of directory when cache was started */ |
136 | u64 iversion; | |
261aaba7 | 137 | |
ab2257e9 MS |
138 | /* protects above fields */ |
139 | spinlock_t lock; | |
140 | } rdc; | |
141 | }; | |
69e34551 | 142 | |
4582a4ab FS |
143 | /** Miscellaneous bits describing inode state */ |
144 | unsigned long state; | |
5c672ab3 MS |
145 | |
146 | /** Lock for serializing lookup and readdir for back compatibility*/ | |
147 | struct mutex mutex; | |
f15ecfef KT |
148 | |
149 | /** Lock to protect write related fields */ | |
150 | spinlock_t lock; | |
c2d0ad00 | 151 | |
6ae330ca VG |
152 | /** |
153 | * Can't take inode lock in fault path (leads to circular dependency). | |
154 | * Introduce another semaphore which can be taken in fault path and | |
155 | * then other filesystem paths can take this to block faults. | |
156 | */ | |
157 | struct rw_semaphore i_mmap_sem; | |
158 | ||
c2d0ad00 VG |
159 | #ifdef CONFIG_FUSE_DAX |
160 | /* | |
161 | * Dax specific inode data | |
162 | */ | |
163 | struct fuse_inode_dax *dax; | |
164 | #endif | |
4582a4ab FS |
165 | }; |
166 | ||
167 | /** FUSE inode state bits */ | |
168 | enum { | |
169 | /** Advise readdirplus */ | |
170 | FUSE_I_ADVISE_RDPLUS, | |
6314efee MS |
171 | /** Initialized with readdirplus */ |
172 | FUSE_I_INIT_RDPLUS, | |
06a7c3c2 MP |
173 | /** An operation changing file size is in progress */ |
174 | FUSE_I_SIZE_UNSTABLE, | |
d8a5ba45 MS |
175 | }; |
176 | ||
da5e4714 | 177 | struct fuse_conn; |
4cb54866 | 178 | struct fuse_release_args; |
da5e4714 | 179 | |
b6aeaded MS |
180 | /** FUSE specific file data */ |
181 | struct fuse_file { | |
da5e4714 MS |
182 | /** Fuse connection for this file */ |
183 | struct fuse_conn *fc; | |
184 | ||
4cb54866 MS |
185 | /* Argument space reserved for release */ |
186 | struct fuse_release_args *release_args; | |
b6aeaded | 187 | |
acf99433 TH |
188 | /** Kernel file handle guaranteed to be unique */ |
189 | u64 kh; | |
190 | ||
b6aeaded MS |
191 | /** File handle used by userspace */ |
192 | u64 fh; | |
c756e0a4 | 193 | |
da5e4714 MS |
194 | /** Node id of this file */ |
195 | u64 nodeid; | |
196 | ||
c756e0a4 | 197 | /** Refcount */ |
4e8c2eb5 | 198 | refcount_t count; |
93a8c3cd | 199 | |
c7b7143c MS |
200 | /** FOPEN_* flags returned by open */ |
201 | u32 open_flags; | |
202 | ||
93a8c3cd MS |
203 | /** Entry on inode's write_files list */ |
204 | struct list_head write_entry; | |
95668a69 | 205 | |
5d7bc7e8 MS |
206 | /* Readdir related */ |
207 | struct { | |
208 | /* | |
209 | * Protects below fields against (crazy) parallel readdir on | |
210 | * same open file. Uncontended in the normal case. | |
211 | */ | |
212 | struct mutex lock; | |
213 | ||
214 | /* Dir stream position */ | |
215 | loff_t pos; | |
216 | ||
217 | /* Offset in cache */ | |
218 | loff_t cache_off; | |
3494927e MS |
219 | |
220 | /* Version of cache we are reading */ | |
221 | u64 version; | |
222 | ||
5d7bc7e8 MS |
223 | } readdir; |
224 | ||
95668a69 TH |
225 | /** RB node to be linked on fuse_conn->polled_files */ |
226 | struct rb_node polled_node; | |
227 | ||
228 | /** Wait queue head for poll */ | |
229 | wait_queue_head_t poll_wait; | |
37fb3a30 MS |
230 | |
231 | /** Has flock been performed on this file? */ | |
232 | bool flock:1; | |
b6aeaded MS |
233 | }; |
234 | ||
334f485d MS |
235 | /** One input argument of a request */ |
236 | struct fuse_in_arg { | |
237 | unsigned size; | |
238 | const void *value; | |
239 | }; | |
240 | ||
334f485d MS |
241 | /** One output argument of a request */ |
242 | struct fuse_arg { | |
243 | unsigned size; | |
244 | void *value; | |
245 | }; | |
246 | ||
b2430d75 MP |
247 | /** FUSE page descriptor */ |
248 | struct fuse_page_desc { | |
249 | unsigned int length; | |
250 | unsigned int offset; | |
251 | }; | |
252 | ||
7078187a | 253 | struct fuse_args { |
d5b48543 | 254 | uint64_t nodeid; |
1f4e9d03 MS |
255 | uint32_t opcode; |
256 | unsigned short in_numargs; | |
257 | unsigned short out_numargs; | |
c500ebaa | 258 | bool force:1; |
454a7613 | 259 | bool noreply:1; |
e413754b | 260 | bool nocreds:1; |
68583165 MS |
261 | bool in_pages:1; |
262 | bool out_pages:1; | |
1f4e9d03 | 263 | bool out_argvar:1; |
68583165 MS |
264 | bool page_zeroing:1; |
265 | bool page_replace:1; | |
bb737bbe | 266 | bool may_block:1; |
d5b48543 | 267 | struct fuse_in_arg in_args[3]; |
d5b48543 | 268 | struct fuse_arg out_args[2]; |
12597287 | 269 | void (*end)(struct fuse_conn *fc, struct fuse_args *args, int error); |
7078187a MS |
270 | }; |
271 | ||
68583165 MS |
272 | struct fuse_args_pages { |
273 | struct fuse_args args; | |
274 | struct page **pages; | |
275 | struct fuse_page_desc *descs; | |
276 | unsigned int num_pages; | |
277 | }; | |
278 | ||
7078187a MS |
279 | #define FUSE_ARGS(args) struct fuse_args args = {} |
280 | ||
01e9d11a MP |
281 | /** The request IO state (for asynchronous processing) */ |
282 | struct fuse_io_priv { | |
744742d6 | 283 | struct kref refcnt; |
01e9d11a MP |
284 | int async; |
285 | spinlock_t lock; | |
286 | unsigned reqs; | |
287 | ssize_t bytes; | |
288 | size_t size; | |
289 | __u64 offset; | |
290 | bool write; | |
61c12b49 | 291 | bool should_dirty; |
01e9d11a MP |
292 | int err; |
293 | struct kiocb *iocb; | |
9d5722b7 | 294 | struct completion *done; |
7879c4e5 | 295 | bool blocking; |
01e9d11a MP |
296 | }; |
297 | ||
e1c0eecb | 298 | #define FUSE_IO_PRIV_SYNC(i) \ |
744742d6 | 299 | { \ |
1e24edca | 300 | .refcnt = KREF_INIT(1), \ |
744742d6 | 301 | .async = 0, \ |
e1c0eecb | 302 | .iocb = i, \ |
744742d6 SF |
303 | } |
304 | ||
825d6d33 MS |
305 | /** |
306 | * Request flags | |
307 | * | |
308 | * FR_ISREPLY: set if the request has reply | |
309 | * FR_FORCE: force sending of the request even if interrupted | |
310 | * FR_BACKGROUND: request is sent in the background | |
311 | * FR_WAITING: request is counted as "waiting" | |
312 | * FR_ABORTED: the request was aborted | |
313 | * FR_INTERRUPTED: the request has been interrupted | |
314 | * FR_LOCKED: data is being copied to/from the request | |
33e14b4d MS |
315 | * FR_PENDING: request is not yet in userspace |
316 | * FR_SENT: request is in userspace, waiting for an answer | |
317 | * FR_FINISHED: request is finished | |
77cd9d48 | 318 | * FR_PRIVATE: request is on private list |
3e8cb8b2 | 319 | * FR_ASYNC: request is asynchronous |
825d6d33 MS |
320 | */ |
321 | enum fuse_req_flag { | |
322 | FR_ISREPLY, | |
323 | FR_FORCE, | |
324 | FR_BACKGROUND, | |
325 | FR_WAITING, | |
326 | FR_ABORTED, | |
327 | FR_INTERRUPTED, | |
328 | FR_LOCKED, | |
33e14b4d MS |
329 | FR_PENDING, |
330 | FR_SENT, | |
331 | FR_FINISHED, | |
77cd9d48 | 332 | FR_PRIVATE, |
3e8cb8b2 | 333 | FR_ASYNC, |
825d6d33 MS |
334 | }; |
335 | ||
334f485d MS |
336 | /** |
337 | * A request to the client | |
dc00809a MS |
338 | * |
339 | * .waitq.lock protects the following fields: | |
340 | * - FR_ABORTED | |
341 | * - FR_LOCKED (may also be modified under fc->lock, tested under both) | |
334f485d MS |
342 | */ |
343 | struct fuse_req { | |
ce1d5a49 MS |
344 | /** This can be on either pending processing or io lists in |
345 | fuse_conn */ | |
334f485d MS |
346 | struct list_head list; |
347 | ||
a4d27e75 MS |
348 | /** Entry on the interrupts list */ |
349 | struct list_head intr_entry; | |
350 | ||
12597287 MS |
351 | /* Input/output arguments */ |
352 | struct fuse_args *args; | |
353 | ||
334f485d | 354 | /** refcount */ |
ec99f6d3 | 355 | refcount_t count; |
334f485d | 356 | |
825d6d33 MS |
357 | /* Request flags, updated with test/set/clear_bit() */ |
358 | unsigned long flags; | |
9bc5ddda | 359 | |
d4993774 MS |
360 | /* The request input header */ |
361 | struct { | |
362 | struct fuse_in_header h; | |
363 | } in; | |
334f485d | 364 | |
d4993774 MS |
365 | /* The request output header */ |
366 | struct { | |
367 | struct fuse_out_header h; | |
368 | } out; | |
334f485d MS |
369 | |
370 | /** Used to wake up the task waiting for completion of request*/ | |
371 | wait_queue_head_t waitq; | |
372 | ||
a62a8ef9 SH |
373 | #if IS_ENABLED(CONFIG_VIRTIO_FS) |
374 | /** virtio-fs's physically contiguous buffer for in and out args */ | |
375 | void *argbuf; | |
376 | #endif | |
334f485d MS |
377 | }; |
378 | ||
ae3aad77 SH |
379 | struct fuse_iqueue; |
380 | ||
381 | /** | |
382 | * Input queue callbacks | |
383 | * | |
384 | * Input queue signalling is device-specific. For example, the /dev/fuse file | |
385 | * uses fiq->waitq and fasync to wake processes that are waiting on queue | |
386 | * readiness. These callbacks allow other device types to respond to input | |
387 | * queue activity. | |
388 | */ | |
389 | struct fuse_iqueue_ops { | |
390 | /** | |
391 | * Signal that a forget has been queued | |
392 | */ | |
393 | void (*wake_forget_and_unlock)(struct fuse_iqueue *fiq) | |
394 | __releases(fiq->lock); | |
395 | ||
396 | /** | |
397 | * Signal that an INTERRUPT request has been queued | |
398 | */ | |
399 | void (*wake_interrupt_and_unlock)(struct fuse_iqueue *fiq) | |
400 | __releases(fiq->lock); | |
401 | ||
402 | /** | |
403 | * Signal that a request has been queued | |
404 | */ | |
405 | void (*wake_pending_and_unlock)(struct fuse_iqueue *fiq) | |
406 | __releases(fiq->lock); | |
a62a8ef9 SH |
407 | |
408 | /** | |
409 | * Clean up when fuse_iqueue is destroyed | |
410 | */ | |
411 | void (*release)(struct fuse_iqueue *fiq); | |
ae3aad77 SH |
412 | }; |
413 | ||
414 | /** /dev/fuse input queue operations */ | |
415 | extern const struct fuse_iqueue_ops fuse_dev_fiq_ops; | |
416 | ||
f88996a9 | 417 | struct fuse_iqueue { |
e16714d8 MS |
418 | /** Connection established */ |
419 | unsigned connected; | |
420 | ||
76e43c8c EB |
421 | /** Lock protecting accesses to members of this structure */ |
422 | spinlock_t lock; | |
423 | ||
f88996a9 MS |
424 | /** Readers of the connection are waiting on this */ |
425 | wait_queue_head_t waitq; | |
426 | ||
427 | /** The next unique request id */ | |
428 | u64 reqctr; | |
429 | ||
430 | /** The list of pending requests */ | |
431 | struct list_head pending; | |
432 | ||
433 | /** Pending interrupts */ | |
434 | struct list_head interrupts; | |
435 | ||
436 | /** Queue of pending forgets */ | |
437 | struct fuse_forget_link forget_list_head; | |
438 | struct fuse_forget_link *forget_list_tail; | |
439 | ||
440 | /** Batching of FORGET requests (positive indicates FORGET batch) */ | |
441 | int forget_batch; | |
442 | ||
443 | /** O_ASYNC requests */ | |
444 | struct fasync_struct *fasync; | |
ae3aad77 SH |
445 | |
446 | /** Device-specific callbacks */ | |
447 | const struct fuse_iqueue_ops *ops; | |
448 | ||
449 | /** Device-specific state */ | |
450 | void *priv; | |
f88996a9 MS |
451 | }; |
452 | ||
be2ff42c KT |
453 | #define FUSE_PQ_HASH_BITS 8 |
454 | #define FUSE_PQ_HASH_SIZE (1 << FUSE_PQ_HASH_BITS) | |
455 | ||
3a2b5b9c | 456 | struct fuse_pqueue { |
e96edd94 MS |
457 | /** Connection established */ |
458 | unsigned connected; | |
459 | ||
45a91cb1 MS |
460 | /** Lock protecting accessess to members of this structure */ |
461 | spinlock_t lock; | |
462 | ||
be2ff42c KT |
463 | /** Hash table of requests being processed */ |
464 | struct list_head *processing; | |
3a2b5b9c MS |
465 | |
466 | /** The list of requests under I/O */ | |
467 | struct list_head io; | |
468 | }; | |
469 | ||
cc080e9e MS |
470 | /** |
471 | * Fuse device instance | |
472 | */ | |
473 | struct fuse_dev { | |
474 | /** Fuse connection for this device */ | |
475 | struct fuse_conn *fc; | |
476 | ||
c3696046 MS |
477 | /** Processing queue */ |
478 | struct fuse_pqueue pq; | |
479 | ||
cc080e9e MS |
480 | /** list entry on fc->devices */ |
481 | struct list_head entry; | |
482 | }; | |
483 | ||
0cc2656c SH |
484 | struct fuse_fs_context { |
485 | int fd; | |
486 | unsigned int rootmode; | |
487 | kuid_t user_id; | |
488 | kgid_t group_id; | |
489 | bool is_bdev:1; | |
490 | bool fd_present:1; | |
491 | bool rootmode_present:1; | |
492 | bool user_id_present:1; | |
493 | bool group_id_present:1; | |
494 | bool default_permissions:1; | |
495 | bool allow_other:1; | |
783863d6 | 496 | bool destroy:1; |
15c8e72e VG |
497 | bool no_control:1; |
498 | bool no_force_umount:1; | |
f4fd4ae3 | 499 | bool legacy_opts_show:1; |
1dd53957 | 500 | bool dax:1; |
0cc2656c SH |
501 | unsigned int max_read; |
502 | unsigned int blksize; | |
503 | const char *subtype; | |
504 | ||
1dd53957 VG |
505 | /* DAX device, may be NULL */ |
506 | struct dax_device *dax_dev; | |
507 | ||
0cc2656c SH |
508 | /* fuse_dev pointer to fill in, should contain NULL on entry */ |
509 | void **fudptr; | |
510 | }; | |
511 | ||
d8a5ba45 MS |
512 | /** |
513 | * A Fuse connection. | |
514 | * | |
515 | * This structure is created, when the filesystem is mounted, and is | |
516 | * destroyed, when the client device is closed and the filesystem is | |
517 | * unmounted. | |
518 | */ | |
519 | struct fuse_conn { | |
d7133114 MS |
520 | /** Lock protecting accessess to members of this structure */ |
521 | spinlock_t lock; | |
522 | ||
bafa9654 | 523 | /** Refcount */ |
095fc40a | 524 | refcount_t count; |
bafa9654 | 525 | |
c3696046 MS |
526 | /** Number of fuse_dev's */ |
527 | atomic_t dev_count; | |
528 | ||
dd3e2c55 AV |
529 | struct rcu_head rcu; |
530 | ||
d8a5ba45 | 531 | /** The user id for this mount */ |
499dcf20 | 532 | kuid_t user_id; |
d8a5ba45 | 533 | |
87729a55 | 534 | /** The group id for this mount */ |
499dcf20 | 535 | kgid_t group_id; |
87729a55 | 536 | |
0b6e9ea0 SF |
537 | /** The pid namespace for this mount */ |
538 | struct pid_namespace *pid_ns; | |
539 | ||
8cb08329 EB |
540 | /** The user namespace for this mount */ |
541 | struct user_namespace *user_ns; | |
542 | ||
db50b96c MS |
543 | /** Maximum read size */ |
544 | unsigned max_read; | |
545 | ||
413ef8cb MS |
546 | /** Maximum write size */ |
547 | unsigned max_write; | |
548 | ||
5da784cc CS |
549 | /** Maxmum number of pages that can be used in a single request */ |
550 | unsigned int max_pages; | |
551 | ||
f88996a9 MS |
552 | /** Input queue */ |
553 | struct fuse_iqueue iq; | |
334f485d | 554 | |
acf99433 | 555 | /** The next unique kernel file handle */ |
75126f55 | 556 | atomic64_t khctr; |
acf99433 | 557 | |
95668a69 TH |
558 | /** rbtree of fuse_files waiting for poll events indexed by ph */ |
559 | struct rb_root polled_files; | |
560 | ||
7a6d3c8b CH |
561 | /** Maximum number of outstanding background requests */ |
562 | unsigned max_background; | |
563 | ||
564 | /** Number of background requests at which congestion starts */ | |
565 | unsigned congestion_threshold; | |
566 | ||
08a53cdc MS |
567 | /** Number of requests currently in the background */ |
568 | unsigned num_background; | |
569 | ||
d12def1b MS |
570 | /** Number of background requests currently queued for userspace */ |
571 | unsigned active_background; | |
572 | ||
573 | /** The list of background requests set aside for later queuing */ | |
574 | struct list_head bg_queue; | |
575 | ||
ae2dffa3 KT |
576 | /** Protects: max_background, congestion_threshold, num_background, |
577 | * active_background, bg_queue, blocked */ | |
578 | spinlock_t bg_lock; | |
579 | ||
796523fb MP |
580 | /** Flag indicating that INIT reply has been received. Allocating |
581 | * any fuse request will be suspended until the flag is set */ | |
582 | int initialized; | |
583 | ||
08a53cdc MS |
584 | /** Flag indicating if connection is blocked. This will be |
585 | the case before the INIT reply is received, and if there | |
586 | are too many outstading backgrounds requests */ | |
587 | int blocked; | |
588 | ||
589 | /** waitq for blocked connection */ | |
590 | wait_queue_head_t blocked_waitq; | |
de5e3dec | 591 | |
69a53bf2 MS |
592 | /** Connection established, cleared on umount, connection |
593 | abort and device release */ | |
095da6cb | 594 | unsigned connected; |
1e9a4ed9 | 595 | |
3b7008b2 SL |
596 | /** Connection aborted via sysfs */ |
597 | bool aborted; | |
598 | ||
095da6cb MS |
599 | /** Connection failed (version mismatch). Cannot race with |
600 | setting other bitfields since it is only set once in INIT | |
601 | reply, before any other request, and never cleared */ | |
1729a16c | 602 | unsigned conn_error:1; |
334f485d | 603 | |
0ec7ca41 | 604 | /** Connection successful. Only set in INIT */ |
1729a16c | 605 | unsigned conn_init:1; |
0ec7ca41 | 606 | |
9cd68455 | 607 | /** Do readpages asynchronously? Only set in INIT */ |
1729a16c | 608 | unsigned async_read:1; |
9cd68455 | 609 | |
3b7008b2 SL |
610 | /** Return an unique read error after abort. Only set in INIT */ |
611 | unsigned abort_err:1; | |
612 | ||
6ff958ed | 613 | /** Do not send separate SETATTR request before open(O_TRUNC) */ |
1729a16c | 614 | unsigned atomic_o_trunc:1; |
6ff958ed | 615 | |
33670fa2 | 616 | /** Filesystem supports NFS exporting. Only set in INIT */ |
1729a16c | 617 | unsigned export_support:1; |
33670fa2 | 618 | |
d5cd66c5 PE |
619 | /** write-back cache policy (default is write-through) */ |
620 | unsigned writeback_cache:1; | |
621 | ||
5c672ab3 MS |
622 | /** allow parallel lookups and readdir (default is serialized) */ |
623 | unsigned parallel_dirops:1; | |
624 | ||
5e940c1d MS |
625 | /** handle fs handles killing suid/sgid/cap on write/chown/trunc */ |
626 | unsigned handle_killpriv:1; | |
627 | ||
5571f1e6 DS |
628 | /** cache READLINK responses in page cache */ |
629 | unsigned cache_symlinks:1; | |
630 | ||
f4fd4ae3 VG |
631 | /* show legacy mount options */ |
632 | unsigned int legacy_opts_show:1; | |
633 | ||
095da6cb MS |
634 | /* |
635 | * The following bitfields are only for optimization purposes | |
636 | * and hence races in setting them will not cause malfunction | |
637 | */ | |
638 | ||
7678ac50 AG |
639 | /** Is open/release not implemented by fs? */ |
640 | unsigned no_open:1; | |
641 | ||
d9a9ea94 CA |
642 | /** Is opendir/releasedir not implemented by fs? */ |
643 | unsigned no_opendir:1; | |
644 | ||
b6aeaded | 645 | /** Is fsync not implemented by fs? */ |
1729a16c | 646 | unsigned no_fsync:1; |
b6aeaded | 647 | |
82547981 | 648 | /** Is fsyncdir not implemented by fs? */ |
1729a16c | 649 | unsigned no_fsyncdir:1; |
82547981 | 650 | |
b6aeaded | 651 | /** Is flush not implemented by fs? */ |
1729a16c | 652 | unsigned no_flush:1; |
b6aeaded | 653 | |
92a8780e | 654 | /** Is setxattr not implemented by fs? */ |
1729a16c | 655 | unsigned no_setxattr:1; |
92a8780e MS |
656 | |
657 | /** Is getxattr not implemented by fs? */ | |
1729a16c | 658 | unsigned no_getxattr:1; |
92a8780e MS |
659 | |
660 | /** Is listxattr not implemented by fs? */ | |
1729a16c | 661 | unsigned no_listxattr:1; |
92a8780e MS |
662 | |
663 | /** Is removexattr not implemented by fs? */ | |
1729a16c | 664 | unsigned no_removexattr:1; |
92a8780e | 665 | |
37fb3a30 | 666 | /** Are posix file locking primitives not implemented by fs? */ |
1729a16c | 667 | unsigned no_lock:1; |
71421259 | 668 | |
31d40d74 | 669 | /** Is access not implemented by fs? */ |
1729a16c | 670 | unsigned no_access:1; |
31d40d74 | 671 | |
fd72faac | 672 | /** Is create not implemented by fs? */ |
1729a16c | 673 | unsigned no_create:1; |
fd72faac | 674 | |
a4d27e75 | 675 | /** Is interrupt not implemented by fs? */ |
1729a16c | 676 | unsigned no_interrupt:1; |
a4d27e75 | 677 | |
b2d2272f | 678 | /** Is bmap not implemented by fs? */ |
1729a16c | 679 | unsigned no_bmap:1; |
b2d2272f | 680 | |
95668a69 TH |
681 | /** Is poll not implemented by fs? */ |
682 | unsigned no_poll:1; | |
683 | ||
78bb6cb9 | 684 | /** Do multi-page cached writes */ |
1729a16c | 685 | unsigned big_writes:1; |
78bb6cb9 | 686 | |
e0a43ddc MS |
687 | /** Don't apply umask to creation modes */ |
688 | unsigned dont_mask:1; | |
689 | ||
37fb3a30 MS |
690 | /** Are BSD file locking primitives not implemented by fs? */ |
691 | unsigned no_flock:1; | |
692 | ||
519c6040 MS |
693 | /** Is fallocate not implemented by fs? */ |
694 | unsigned no_fallocate:1; | |
695 | ||
1560c974 MS |
696 | /** Is rename with flags implemented by fs? */ |
697 | unsigned no_rename2:1; | |
698 | ||
72d0d248 BF |
699 | /** Use enhanced/automatic page cache invalidation. */ |
700 | unsigned auto_inval_data:1; | |
701 | ||
ad2ba64d KS |
702 | /** Filesystem is fully reponsible for page cache invalidation. */ |
703 | unsigned explicit_inval_data:1; | |
704 | ||
634734b6 | 705 | /** Does the filesystem support readdirplus? */ |
0b05b183 AA |
706 | unsigned do_readdirplus:1; |
707 | ||
634734b6 EW |
708 | /** Does the filesystem want adaptive readdirplus? */ |
709 | unsigned readdirplus_auto:1; | |
710 | ||
60b9df7a MS |
711 | /** Does the filesystem support asynchronous direct-IO submission? */ |
712 | unsigned async_dio:1; | |
713 | ||
0b5da8db R |
714 | /** Is lseek not implemented by fs? */ |
715 | unsigned no_lseek:1; | |
716 | ||
60bcc88a SF |
717 | /** Does the filesystem support posix acls? */ |
718 | unsigned posix_acl:1; | |
719 | ||
29433a29 MS |
720 | /** Check permissions based on the file mode or not? */ |
721 | unsigned default_permissions:1; | |
722 | ||
723 | /** Allow other than the mounter user to access the filesystem ? */ | |
724 | unsigned allow_other:1; | |
725 | ||
88bc7d50 NV |
726 | /** Does the filesystem support copy_file_range? */ |
727 | unsigned no_copy_file_range:1; | |
728 | ||
1ccd1ea2 MS |
729 | /* Send DESTROY request */ |
730 | unsigned int destroy:1; | |
731 | ||
8fab0106 MS |
732 | /* Delete dentries that have gone stale */ |
733 | unsigned int delete_stale:1; | |
734 | ||
15c8e72e VG |
735 | /** Do not create entry in fusectl fs */ |
736 | unsigned int no_control:1; | |
737 | ||
738 | /** Do not allow MNT_FORCE umount */ | |
739 | unsigned int no_force_umount:1; | |
740 | ||
0cd5b885 MS |
741 | /** The number of requests waiting for completion */ |
742 | atomic_t num_waiting; | |
743 | ||
45714d65 MS |
744 | /** Negotiated minor version */ |
745 | unsigned minor; | |
746 | ||
bafa9654 MS |
747 | /** Entry on the fuse_conn_list */ |
748 | struct list_head entry; | |
749 | ||
b6f2fcbc MS |
750 | /** Device ID from super block */ |
751 | dev_t dev; | |
bafa9654 MS |
752 | |
753 | /** Dentries in the control filesystem */ | |
754 | struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; | |
755 | ||
756 | /** number of dentries used in the above array */ | |
757 | int ctl_ndents; | |
385a17bf | 758 | |
9c8ef561 MS |
759 | /** Key for lock owner ID scrambling */ |
760 | u32 scramble_key[4]; | |
0ec7ca41 | 761 | |
1fb69e78 | 762 | /** Version counter for attribute changes */ |
4510d86f | 763 | atomic64_t attr_version; |
43901aab TH |
764 | |
765 | /** Called on final put */ | |
766 | void (*release)(struct fuse_conn *); | |
3b463ae0 JM |
767 | |
768 | /** Super block for this connection. */ | |
769 | struct super_block *sb; | |
770 | ||
771 | /** Read/write semaphore to hold when accessing sb. */ | |
772 | struct rw_semaphore killsb; | |
cc080e9e MS |
773 | |
774 | /** List of device instances belonging to this connection */ | |
775 | struct list_head devices; | |
1dd53957 VG |
776 | |
777 | #ifdef CONFIG_FUSE_DAX | |
778 | /* Dax specific conn data, non-NULL if DAX is enabled */ | |
779 | struct fuse_conn_dax *dax; | |
780 | #endif | |
d8a5ba45 MS |
781 | }; |
782 | ||
d8a5ba45 MS |
783 | static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) |
784 | { | |
6383bdaa | 785 | return sb->s_fs_info; |
d8a5ba45 MS |
786 | } |
787 | ||
788 | static inline struct fuse_conn *get_fuse_conn(struct inode *inode) | |
789 | { | |
790 | return get_fuse_conn_super(inode->i_sb); | |
791 | } | |
792 | ||
793 | static inline struct fuse_inode *get_fuse_inode(struct inode *inode) | |
794 | { | |
795 | return container_of(inode, struct fuse_inode, inode); | |
796 | } | |
797 | ||
798 | static inline u64 get_node_id(struct inode *inode) | |
799 | { | |
800 | return get_fuse_inode(inode)->nodeid; | |
801 | } | |
802 | ||
d123d8e1 MS |
803 | static inline int invalid_nodeid(u64 nodeid) |
804 | { | |
805 | return !nodeid || nodeid == FUSE_ROOT_ID; | |
806 | } | |
807 | ||
4510d86f KT |
808 | static inline u64 fuse_get_attr_version(struct fuse_conn *fc) |
809 | { | |
810 | return atomic64_read(&fc->attr_version); | |
811 | } | |
812 | ||
334f485d | 813 | /** Device operations */ |
4b6f5d20 | 814 | extern const struct file_operations fuse_dev_operations; |
334f485d | 815 | |
4269590a | 816 | extern const struct dentry_operations fuse_dentry_operations; |
0ce267ff | 817 | extern const struct dentry_operations fuse_root_dentry_operations; |
dbd561d2 | 818 | |
3b463ae0 JM |
819 | /** |
820 | * Inode to nodeid comparison. | |
821 | */ | |
822 | int fuse_inode_eq(struct inode *inode, void *_nodeidp); | |
823 | ||
e5e5558e MS |
824 | /** |
825 | * Get a filled in inode | |
826 | */ | |
b48badf0 | 827 | struct inode *fuse_iget(struct super_block *sb, u64 nodeid, |
1fb69e78 MS |
828 | int generation, struct fuse_attr *attr, |
829 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 830 | |
13983d06 | 831 | int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name, |
33670fa2 MS |
832 | struct fuse_entry_out *outarg, struct inode **inode); |
833 | ||
e5e5558e MS |
834 | /** |
835 | * Send FORGET command | |
836 | */ | |
07e77dca MS |
837 | void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, |
838 | u64 nodeid, u64 nlookup); | |
839 | ||
840 | struct fuse_forget_link *fuse_alloc_forget(void); | |
e5e5558e | 841 | |
4388c5aa VG |
842 | struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq, |
843 | unsigned int max, | |
844 | unsigned int *countp); | |
845 | ||
43f5098e | 846 | /* |
361b1eb5 | 847 | * Initialize READ or READDIR request |
04730fef | 848 | */ |
43f5098e MS |
849 | struct fuse_io_args { |
850 | union { | |
851 | struct { | |
852 | struct fuse_read_in in; | |
853 | u64 attr_ver; | |
854 | } read; | |
855 | struct { | |
856 | struct fuse_write_in in; | |
857 | struct fuse_write_out out; | |
858 | } write; | |
859 | }; | |
860 | struct fuse_args_pages ap; | |
861 | struct fuse_io_priv *io; | |
862 | struct fuse_file *ff; | |
863 | }; | |
864 | ||
865 | void fuse_read_args_fill(struct fuse_io_args *ia, struct file *file, loff_t pos, | |
866 | size_t count, int opcode); | |
867 | ||
04730fef MS |
868 | |
869 | /** | |
870 | * Send OPEN or OPENDIR request | |
871 | */ | |
91fe96b4 | 872 | int fuse_open_common(struct inode *inode, struct file *file, bool isdir); |
04730fef | 873 | |
acf99433 | 874 | struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); |
fd72faac | 875 | void fuse_file_free(struct fuse_file *ff); |
c7b7143c | 876 | void fuse_finish_open(struct inode *inode, struct file *file); |
fd72faac | 877 | |
ebf84d0c | 878 | void fuse_sync_release(struct fuse_inode *fi, struct fuse_file *ff, int flags); |
c756e0a4 | 879 | |
04730fef MS |
880 | /** |
881 | * Send RELEASE or RELEASEDIR request | |
882 | */ | |
2e64ff15 | 883 | void fuse_release_common(struct file *file, bool isdir); |
04730fef | 884 | |
82547981 MS |
885 | /** |
886 | * Send FSYNC or FSYNCDIR request | |
887 | */ | |
02c24a82 | 888 | int fuse_fsync_common(struct file *file, loff_t start, loff_t end, |
a9c2d1e8 | 889 | int datasync, int opcode); |
82547981 | 890 | |
95668a69 TH |
891 | /** |
892 | * Notify poll wakeup | |
893 | */ | |
894 | int fuse_notify_poll_wakeup(struct fuse_conn *fc, | |
895 | struct fuse_notify_poll_wakeup_out *outarg); | |
896 | ||
b6aeaded | 897 | /** |
1779381d | 898 | * Initialize file operations on a regular file |
b6aeaded MS |
899 | */ |
900 | void fuse_init_file_inode(struct inode *inode); | |
901 | ||
e5e5558e | 902 | /** |
1779381d | 903 | * Initialize inode operations on regular files and special files |
e5e5558e MS |
904 | */ |
905 | void fuse_init_common(struct inode *inode); | |
906 | ||
907 | /** | |
1779381d | 908 | * Initialize inode and file operations on a directory |
e5e5558e MS |
909 | */ |
910 | void fuse_init_dir(struct inode *inode); | |
911 | ||
912 | /** | |
1779381d | 913 | * Initialize inode operations on a symlink |
e5e5558e MS |
914 | */ |
915 | void fuse_init_symlink(struct inode *inode); | |
916 | ||
917 | /** | |
918 | * Change attributes of an inode | |
919 | */ | |
1fb69e78 MS |
920 | void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, |
921 | u64 attr_valid, u64 attr_version); | |
e5e5558e | 922 | |
3be5a52b MS |
923 | void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, |
924 | u64 attr_valid); | |
925 | ||
334f485d MS |
926 | /** |
927 | * Initialize the client device | |
928 | */ | |
929 | int fuse_dev_init(void); | |
930 | ||
931 | /** | |
932 | * Cleanup the client device | |
933 | */ | |
934 | void fuse_dev_cleanup(void); | |
935 | ||
bafa9654 | 936 | int fuse_ctl_init(void); |
7736e8cc | 937 | void __exit fuse_ctl_cleanup(void); |
bafa9654 | 938 | |
7078187a MS |
939 | /** |
940 | * Simple request sending that does request allocation and freeing | |
941 | */ | |
942 | ssize_t fuse_simple_request(struct fuse_conn *fc, struct fuse_args *args); | |
12597287 MS |
943 | int fuse_simple_background(struct fuse_conn *fc, struct fuse_args *args, |
944 | gfp_t gfp_flags); | |
7078187a | 945 | |
04ec5af0 SH |
946 | /** |
947 | * End a finished request | |
948 | */ | |
949 | void fuse_request_end(struct fuse_conn *fc, struct fuse_req *req); | |
950 | ||
5a5fb1ea | 951 | /* Abort all requests */ |
eb98e3bd | 952 | void fuse_abort_conn(struct fuse_conn *fc); |
b8f95e5d | 953 | void fuse_wait_aborted(struct fuse_conn *fc); |
69a53bf2 | 954 | |
e5e5558e MS |
955 | /** |
956 | * Invalidate inode attributes | |
957 | */ | |
958 | void fuse_invalidate_attr(struct inode *inode); | |
bafa9654 | 959 | |
dbd561d2 MS |
960 | void fuse_invalidate_entry_cache(struct dentry *entry); |
961 | ||
451418fc AG |
962 | void fuse_invalidate_atime(struct inode *inode); |
963 | ||
d123d8e1 MS |
964 | u64 entry_attr_timeout(struct fuse_entry_out *o); |
965 | void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o); | |
966 | ||
bafa9654 MS |
967 | /** |
968 | * Acquire reference to fuse_conn | |
969 | */ | |
970 | struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); | |
971 | ||
0d179aa5 TH |
972 | /** |
973 | * Initialize fuse_conn | |
974 | */ | |
ae3aad77 SH |
975 | void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns, |
976 | const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv); | |
0d179aa5 | 977 | |
bafa9654 MS |
978 | /** |
979 | * Release reference to fuse_conn | |
980 | */ | |
981 | void fuse_conn_put(struct fuse_conn *fc); | |
982 | ||
0cd1eb9a VG |
983 | struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc); |
984 | struct fuse_dev *fuse_dev_alloc(void); | |
985 | void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc); | |
cc080e9e | 986 | void fuse_dev_free(struct fuse_dev *fud); |
95a84cdb | 987 | void fuse_send_init(struct fuse_conn *fc); |
cc080e9e | 988 | |
0cc2656c SH |
989 | /** |
990 | * Fill in superblock and initialize fuse connection | |
991 | * @sb: partially-initialized superblock to fill in | |
992 | * @ctx: mount context | |
993 | */ | |
994 | int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx); | |
995 | ||
783863d6 MS |
996 | /** |
997 | * Disassociate fuse connection from superblock and kill the superblock | |
998 | * | |
999 | * Calls kill_anon_super(), do not use with bdev mounts. | |
1000 | */ | |
1001 | void fuse_kill_sb_anon(struct super_block *sb); | |
1002 | ||
bafa9654 MS |
1003 | /** |
1004 | * Add connection to control filesystem | |
1005 | */ | |
1006 | int fuse_ctl_add_conn(struct fuse_conn *fc); | |
1007 | ||
1008 | /** | |
1009 | * Remove connection from control filesystem | |
1010 | */ | |
1011 | void fuse_ctl_remove_conn(struct fuse_conn *fc); | |
a5bfffac TS |
1012 | |
1013 | /** | |
1014 | * Is file type valid? | |
1015 | */ | |
1016 | int fuse_valid_type(int m); | |
e57ac683 | 1017 | |
eb59bd17 MS |
1018 | bool fuse_invalid_attr(struct fuse_attr *attr); |
1019 | ||
e57ac683 | 1020 | /** |
c2132c1b | 1021 | * Is current process allowed to perform filesystem operation? |
e57ac683 | 1022 | */ |
c2132c1b | 1023 | int fuse_allow_current_process(struct fuse_conn *fc); |
f3332114 MS |
1024 | |
1025 | u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); | |
bcb4be80 | 1026 | |
703c7362 SF |
1027 | void fuse_update_ctime(struct inode *inode); |
1028 | ||
5b97eeac | 1029 | int fuse_update_attributes(struct inode *inode, struct file *file); |
3be5a52b MS |
1030 | |
1031 | void fuse_flush_writepages(struct inode *inode); | |
1032 | ||
1033 | void fuse_set_nowrite(struct inode *inode); | |
1034 | void fuse_release_nowrite(struct inode *inode); | |
5c5c5e51 | 1035 | |
3b463ae0 JM |
1036 | /** |
1037 | * File-system tells the kernel to invalidate cache for the given node id. | |
1038 | */ | |
1039 | int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, | |
1040 | loff_t offset, loff_t len); | |
1041 | ||
1042 | /** | |
1043 | * File-system tells the kernel to invalidate parent attributes and | |
1044 | * the dentry matching parent/name. | |
451d0f59 JM |
1045 | * |
1046 | * If the child_nodeid is non-zero and: | |
1047 | * - matches the inode number for the dentry matching parent/name, | |
1048 | * - is not a mount point | |
1049 | * - is a file or oan empty directory | |
1050 | * then the dentry is unhashed (d_delete()). | |
3b463ae0 JM |
1051 | */ |
1052 | int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, | |
451d0f59 | 1053 | u64 child_nodeid, struct qstr *name); |
3b463ae0 | 1054 | |
08cbf542 TH |
1055 | int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, |
1056 | bool isdir); | |
ea8cd333 PE |
1057 | |
1058 | /** | |
1059 | * fuse_direct_io() flags | |
1060 | */ | |
1061 | ||
1062 | /** If set, it is WRITE; otherwise - READ */ | |
1063 | #define FUSE_DIO_WRITE (1 << 0) | |
1064 | ||
1065 | /** CUSE pass fuse_direct_io() a file which f_mapping->host is not from FUSE */ | |
1066 | #define FUSE_DIO_CUSE (1 << 1) | |
1067 | ||
d22a943f AV |
1068 | ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter, |
1069 | loff_t *ppos, int flags); | |
08cbf542 TH |
1070 | long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, |
1071 | unsigned int flags); | |
b18da0c5 MS |
1072 | long fuse_ioctl_common(struct file *file, unsigned int cmd, |
1073 | unsigned long arg, unsigned int flags); | |
076ccb76 | 1074 | __poll_t fuse_file_poll(struct file *file, poll_table *wait); |
08cbf542 TH |
1075 | int fuse_dev_release(struct inode *inode, struct file *file); |
1076 | ||
b0aa7606 MP |
1077 | bool fuse_write_update_size(struct inode *inode, loff_t pos); |
1078 | ||
ab9e13f7 | 1079 | int fuse_flush_times(struct inode *inode, struct fuse_file *ff); |
1e18bda8 | 1080 | int fuse_write_inode(struct inode *inode, struct writeback_control *wbc); |
a1d75f25 | 1081 | |
62490330 | 1082 | int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, |
efb9fa9e MP |
1083 | struct file *file); |
1084 | ||
9759bd51 MS |
1085 | void fuse_set_initialized(struct fuse_conn *fc); |
1086 | ||
63576c13 MS |
1087 | void fuse_unlock_inode(struct inode *inode, bool locked); |
1088 | bool fuse_lock_inode(struct inode *inode); | |
5c672ab3 | 1089 | |
60bcc88a SF |
1090 | int fuse_setxattr(struct inode *inode, const char *name, const void *value, |
1091 | size_t size, int flags); | |
1092 | ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value, | |
1093 | size_t size); | |
703c7362 | 1094 | ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size); |
60bcc88a | 1095 | int fuse_removexattr(struct inode *inode, const char *name); |
703c7362 | 1096 | extern const struct xattr_handler *fuse_xattr_handlers[]; |
60bcc88a | 1097 | extern const struct xattr_handler *fuse_acl_xattr_handlers[]; |
e45b2546 | 1098 | extern const struct xattr_handler *fuse_no_acl_xattr_handlers[]; |
60bcc88a SF |
1099 | |
1100 | struct posix_acl; | |
1101 | struct posix_acl *fuse_get_acl(struct inode *inode, int type); | |
1102 | int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type); | |
703c7362 | 1103 | |
d123d8e1 MS |
1104 | |
1105 | /* readdir.c */ | |
1106 | int fuse_readdir(struct file *file, struct dir_context *ctx); | |
1107 | ||
14d46d7a SH |
1108 | /** |
1109 | * Return the number of bytes in an arguments list | |
1110 | */ | |
1111 | unsigned int fuse_len_args(unsigned int numargs, struct fuse_arg *args); | |
1112 | ||
79d96eff SH |
1113 | /** |
1114 | * Get the next unique ID for a request | |
1115 | */ | |
1116 | u64 fuse_get_unique(struct fuse_iqueue *fiq); | |
783863d6 | 1117 | void fuse_free_conn(struct fuse_conn *fc); |
79d96eff | 1118 | |
1dd53957 VG |
1119 | /* dax.c */ |
1120 | ||
c2d0ad00 VG |
1121 | #define FUSE_IS_DAX(inode) (IS_ENABLED(CONFIG_FUSE_DAX) && IS_DAX(inode)) |
1122 | ||
1123 | ssize_t fuse_dax_read_iter(struct kiocb *iocb, struct iov_iter *to); | |
1124 | ssize_t fuse_dax_write_iter(struct kiocb *iocb, struct iov_iter *from); | |
1125 | int fuse_dax_mmap(struct file *file, struct vm_area_struct *vma); | |
6ae330ca | 1126 | int fuse_dax_break_layouts(struct inode *inode, u64 dmap_start, u64 dmap_end); |
1dd53957 VG |
1127 | int fuse_dax_conn_alloc(struct fuse_conn *fc, struct dax_device *dax_dev); |
1128 | void fuse_dax_conn_free(struct fuse_conn *fc); | |
c2d0ad00 VG |
1129 | bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi); |
1130 | void fuse_dax_inode_init(struct inode *inode); | |
1131 | void fuse_dax_inode_cleanup(struct inode *inode); | |
fd1a1dc6 | 1132 | bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment); |
9a752d18 | 1133 | void fuse_dax_cancel_work(struct fuse_conn *fc); |
1dd53957 | 1134 | |
29d434b3 | 1135 | #endif /* _FS_FUSE_I_H */ |