]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * net/9p/clnt.c | |
3 | * | |
4 | * 9P Client | |
5 | * | |
6 | * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 | |
11 | * as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/poll.h> | |
30 | #include <linux/idr.h> | |
31 | #include <linux/mutex.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/uaccess.h> | |
35 | #include <net/9p/9p.h> | |
36 | #include <linux/parser.h> | |
37 | #include <net/9p/client.h> | |
38 | #include <net/9p/transport.h> | |
39 | #include "protocol.h" | |
40 | ||
41 | /* | |
42 | * Client Option Parsing (code inspired by NFS code) | |
43 | * - a little lazy - parse all client options | |
44 | */ | |
45 | ||
46 | enum { | |
47 | Opt_msize, | |
48 | Opt_trans, | |
49 | Opt_legacy, | |
50 | Opt_version, | |
51 | Opt_err, | |
52 | }; | |
53 | ||
54 | static const match_table_t tokens = { | |
55 | {Opt_msize, "msize=%u"}, | |
56 | {Opt_legacy, "noextend"}, | |
57 | {Opt_trans, "trans=%s"}, | |
58 | {Opt_version, "version=%s"}, | |
59 | {Opt_err, NULL}, | |
60 | }; | |
61 | ||
62 | inline int p9_is_proto_dotl(struct p9_client *clnt) | |
63 | { | |
64 | return clnt->proto_version == p9_proto_2000L; | |
65 | } | |
66 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
67 | ||
68 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
69 | { | |
70 | return clnt->proto_version == p9_proto_2000u; | |
71 | } | |
72 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
73 | ||
74 | /* Interpret mount option for protocol version */ | |
75 | static int get_protocol_version(const substring_t *name) | |
76 | { | |
77 | int version = -EINVAL; | |
78 | ||
79 | if (!strncmp("9p2000", name->from, name->to-name->from)) { | |
80 | version = p9_proto_legacy; | |
81 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); | |
82 | } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) { | |
83 | version = p9_proto_2000u; | |
84 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); | |
85 | } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) { | |
86 | version = p9_proto_2000L; | |
87 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); | |
88 | } else { | |
89 | P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ", | |
90 | name->from); | |
91 | } | |
92 | return version; | |
93 | } | |
94 | ||
95 | static struct p9_req_t * | |
96 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
97 | ||
98 | /** | |
99 | * parse_options - parse mount options into client structure | |
100 | * @opts: options string passed from mount | |
101 | * @clnt: existing v9fs client information | |
102 | * | |
103 | * Return 0 upon success, -ERRNO upon failure | |
104 | */ | |
105 | ||
106 | static int parse_opts(char *opts, struct p9_client *clnt) | |
107 | { | |
108 | char *options, *tmp_options; | |
109 | char *p; | |
110 | substring_t args[MAX_OPT_ARGS]; | |
111 | int option; | |
112 | int ret = 0; | |
113 | ||
114 | clnt->proto_version = p9_proto_2000u; | |
115 | clnt->msize = 8192; | |
116 | ||
117 | if (!opts) | |
118 | return 0; | |
119 | ||
120 | tmp_options = kstrdup(opts, GFP_KERNEL); | |
121 | if (!tmp_options) { | |
122 | P9_DPRINTK(P9_DEBUG_ERROR, | |
123 | "failed to allocate copy of option string\n"); | |
124 | return -ENOMEM; | |
125 | } | |
126 | options = tmp_options; | |
127 | ||
128 | while ((p = strsep(&options, ",")) != NULL) { | |
129 | int token; | |
130 | if (!*p) | |
131 | continue; | |
132 | token = match_token(p, tokens, args); | |
133 | if (token < Opt_trans) { | |
134 | int r = match_int(&args[0], &option); | |
135 | if (r < 0) { | |
136 | P9_DPRINTK(P9_DEBUG_ERROR, | |
137 | "integer field, but no integer?\n"); | |
138 | ret = r; | |
139 | continue; | |
140 | } | |
141 | } | |
142 | switch (token) { | |
143 | case Opt_msize: | |
144 | clnt->msize = option; | |
145 | break; | |
146 | case Opt_trans: | |
147 | clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); | |
148 | if(clnt->trans_mod == NULL) { | |
149 | P9_DPRINTK(P9_DEBUG_ERROR, | |
150 | "Could not find request transport: %s\n", | |
151 | (char *) &args[0]); | |
152 | ret = -EINVAL; | |
153 | goto free_and_return; | |
154 | } | |
155 | break; | |
156 | case Opt_legacy: | |
157 | clnt->proto_version = p9_proto_legacy; | |
158 | break; | |
159 | case Opt_version: | |
160 | ret = get_protocol_version(&args[0]); | |
161 | if (ret == -EINVAL) | |
162 | goto free_and_return; | |
163 | clnt->proto_version = ret; | |
164 | break; | |
165 | default: | |
166 | continue; | |
167 | } | |
168 | } | |
169 | ||
170 | free_and_return: | |
171 | kfree(tmp_options); | |
172 | return ret; | |
173 | } | |
174 | ||
175 | /** | |
176 | * p9_tag_alloc - lookup/allocate a request by tag | |
177 | * @c: client session to lookup tag within | |
178 | * @tag: numeric id for transaction | |
179 | * | |
180 | * this is a simple array lookup, but will grow the | |
181 | * request_slots as necessary to accomodate transaction | |
182 | * ids which did not previously have a slot. | |
183 | * | |
184 | * this code relies on the client spinlock to manage locks, its | |
185 | * possible we should switch to something else, but I'd rather | |
186 | * stick with something low-overhead for the common case. | |
187 | * | |
188 | */ | |
189 | ||
190 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) | |
191 | { | |
192 | unsigned long flags; | |
193 | int row, col; | |
194 | struct p9_req_t *req; | |
195 | ||
196 | /* This looks up the original request by tag so we know which | |
197 | * buffer to read the data into */ | |
198 | tag++; | |
199 | ||
200 | if (tag >= c->max_tag) { | |
201 | spin_lock_irqsave(&c->lock, flags); | |
202 | /* check again since original check was outside of lock */ | |
203 | while (tag >= c->max_tag) { | |
204 | row = (tag / P9_ROW_MAXTAG); | |
205 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
206 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
207 | ||
208 | if (!c->reqs[row]) { | |
209 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
210 | spin_unlock_irqrestore(&c->lock, flags); | |
211 | return ERR_PTR(-ENOMEM); | |
212 | } | |
213 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
214 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
215 | c->reqs[row][col].tc = NULL; | |
216 | } | |
217 | c->max_tag += P9_ROW_MAXTAG; | |
218 | } | |
219 | spin_unlock_irqrestore(&c->lock, flags); | |
220 | } | |
221 | row = tag / P9_ROW_MAXTAG; | |
222 | col = tag % P9_ROW_MAXTAG; | |
223 | ||
224 | req = &c->reqs[row][col]; | |
225 | if (!req->tc) { | |
226 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); | |
227 | if (!req->wq) { | |
228 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
229 | return ERR_PTR(-ENOMEM); | |
230 | } | |
231 | init_waitqueue_head(req->wq); | |
232 | req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
233 | GFP_KERNEL); | |
234 | req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
235 | GFP_KERNEL); | |
236 | if ((!req->tc) || (!req->rc)) { | |
237 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
238 | kfree(req->tc); | |
239 | kfree(req->rc); | |
240 | kfree(req->wq); | |
241 | req->tc = req->rc = NULL; | |
242 | req->wq = NULL; | |
243 | return ERR_PTR(-ENOMEM); | |
244 | } | |
245 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); | |
246 | req->tc->capacity = c->msize; | |
247 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); | |
248 | req->rc->capacity = c->msize; | |
249 | } | |
250 | ||
251 | p9pdu_reset(req->tc); | |
252 | p9pdu_reset(req->rc); | |
253 | ||
254 | req->tc->tag = tag-1; | |
255 | req->status = REQ_STATUS_ALLOC; | |
256 | ||
257 | return &c->reqs[row][col]; | |
258 | } | |
259 | ||
260 | /** | |
261 | * p9_tag_lookup - lookup a request by tag | |
262 | * @c: client session to lookup tag within | |
263 | * @tag: numeric id for transaction | |
264 | * | |
265 | */ | |
266 | ||
267 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
268 | { | |
269 | int row, col; | |
270 | ||
271 | /* This looks up the original request by tag so we know which | |
272 | * buffer to read the data into */ | |
273 | tag++; | |
274 | ||
275 | BUG_ON(tag >= c->max_tag); | |
276 | ||
277 | row = tag / P9_ROW_MAXTAG; | |
278 | col = tag % P9_ROW_MAXTAG; | |
279 | ||
280 | return &c->reqs[row][col]; | |
281 | } | |
282 | EXPORT_SYMBOL(p9_tag_lookup); | |
283 | ||
284 | /** | |
285 | * p9_tag_init - setup tags structure and contents | |
286 | * @c: v9fs client struct | |
287 | * | |
288 | * This initializes the tags structure for each client instance. | |
289 | * | |
290 | */ | |
291 | ||
292 | static int p9_tag_init(struct p9_client *c) | |
293 | { | |
294 | int err = 0; | |
295 | ||
296 | c->tagpool = p9_idpool_create(); | |
297 | if (IS_ERR(c->tagpool)) { | |
298 | err = PTR_ERR(c->tagpool); | |
299 | c->tagpool = NULL; | |
300 | goto error; | |
301 | } | |
302 | ||
303 | p9_idpool_get(c->tagpool); /* reserve tag 0 */ | |
304 | ||
305 | c->max_tag = 0; | |
306 | error: | |
307 | return err; | |
308 | } | |
309 | ||
310 | /** | |
311 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
312 | * @c: v9fs client struct | |
313 | * | |
314 | * This frees resources associated with the tags structure | |
315 | * | |
316 | */ | |
317 | static void p9_tag_cleanup(struct p9_client *c) | |
318 | { | |
319 | int row, col; | |
320 | ||
321 | /* check to insure all requests are idle */ | |
322 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
323 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
324 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
325 | P9_DPRINTK(P9_DEBUG_MUX, | |
326 | "Attempting to cleanup non-free tag %d,%d\n", | |
327 | row, col); | |
328 | /* TODO: delay execution of cleanup */ | |
329 | return; | |
330 | } | |
331 | } | |
332 | } | |
333 | ||
334 | if (c->tagpool) { | |
335 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
336 | p9_idpool_destroy(c->tagpool); | |
337 | } | |
338 | ||
339 | /* free requests associated with tags */ | |
340 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
341 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
342 | kfree(c->reqs[row][col].wq); | |
343 | kfree(c->reqs[row][col].tc); | |
344 | kfree(c->reqs[row][col].rc); | |
345 | } | |
346 | kfree(c->reqs[row]); | |
347 | } | |
348 | c->max_tag = 0; | |
349 | } | |
350 | ||
351 | /** | |
352 | * p9_free_req - free a request and clean-up as necessary | |
353 | * c: client state | |
354 | * r: request to release | |
355 | * | |
356 | */ | |
357 | ||
358 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) | |
359 | { | |
360 | int tag = r->tc->tag; | |
361 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
362 | ||
363 | r->status = REQ_STATUS_IDLE; | |
364 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) | |
365 | p9_idpool_put(tag, c->tagpool); | |
366 | } | |
367 | ||
368 | /** | |
369 | * p9_client_cb - call back from transport to client | |
370 | * c: client state | |
371 | * req: request received | |
372 | * | |
373 | */ | |
374 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
375 | { | |
376 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); | |
377 | wake_up(req->wq); | |
378 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
379 | } | |
380 | EXPORT_SYMBOL(p9_client_cb); | |
381 | ||
382 | /** | |
383 | * p9_parse_header - parse header arguments out of a packet | |
384 | * @pdu: packet to parse | |
385 | * @size: size of packet | |
386 | * @type: type of request | |
387 | * @tag: tag of packet | |
388 | * @rewind: set if we need to rewind offset afterwards | |
389 | */ | |
390 | ||
391 | int | |
392 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
393 | int rewind) | |
394 | { | |
395 | int8_t r_type; | |
396 | int16_t r_tag; | |
397 | int32_t r_size; | |
398 | int offset = pdu->offset; | |
399 | int err; | |
400 | ||
401 | pdu->offset = 0; | |
402 | if (pdu->size == 0) | |
403 | pdu->size = 7; | |
404 | ||
405 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
406 | if (err) | |
407 | goto rewind_and_exit; | |
408 | ||
409 | pdu->size = r_size; | |
410 | pdu->id = r_type; | |
411 | pdu->tag = r_tag; | |
412 | ||
413 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, | |
414 | pdu->id, pdu->tag); | |
415 | ||
416 | if (type) | |
417 | *type = r_type; | |
418 | if (tag) | |
419 | *tag = r_tag; | |
420 | if (size) | |
421 | *size = r_size; | |
422 | ||
423 | ||
424 | rewind_and_exit: | |
425 | if (rewind) | |
426 | pdu->offset = offset; | |
427 | return err; | |
428 | } | |
429 | EXPORT_SYMBOL(p9_parse_header); | |
430 | ||
431 | /** | |
432 | * p9_check_errors - check 9p packet for error return and process it | |
433 | * @c: current client instance | |
434 | * @req: request to parse and check for error conditions | |
435 | * | |
436 | * returns error code if one is discovered, otherwise returns 0 | |
437 | * | |
438 | * this will have to be more complicated if we have multiple | |
439 | * error packet types | |
440 | */ | |
441 | ||
442 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
443 | { | |
444 | int8_t type; | |
445 | int err; | |
446 | ||
447 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
448 | if (err) { | |
449 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
450 | return err; | |
451 | } | |
452 | ||
453 | if (type == P9_RERROR || type == P9_RLERROR) { | |
454 | int ecode; | |
455 | ||
456 | if (!p9_is_proto_dotl(c)) { | |
457 | char *ename; | |
458 | ||
459 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", | |
460 | &ename, &ecode); | |
461 | if (err) | |
462 | goto out_err; | |
463 | ||
464 | if (p9_is_proto_dotu(c)) | |
465 | err = -ecode; | |
466 | ||
467 | if (!err || !IS_ERR_VALUE(err)) { | |
468 | err = p9_errstr2errno(ename, strlen(ename)); | |
469 | ||
470 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); | |
471 | ||
472 | kfree(ename); | |
473 | } | |
474 | } else { | |
475 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
476 | err = -ecode; | |
477 | ||
478 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); | |
479 | } | |
480 | ||
481 | } else | |
482 | err = 0; | |
483 | ||
484 | return err; | |
485 | ||
486 | out_err: | |
487 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); | |
488 | ||
489 | return err; | |
490 | } | |
491 | ||
492 | /** | |
493 | * p9_client_flush - flush (cancel) a request | |
494 | * @c: client state | |
495 | * @oldreq: request to cancel | |
496 | * | |
497 | * This sents a flush for a particular requests and links | |
498 | * the flush request to the original request. The current | |
499 | * code only supports a single flush request although the protocol | |
500 | * allows for multiple flush requests to be sent for a single request. | |
501 | * | |
502 | */ | |
503 | ||
504 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
505 | { | |
506 | struct p9_req_t *req; | |
507 | int16_t oldtag; | |
508 | int err; | |
509 | ||
510 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
511 | if (err) | |
512 | return err; | |
513 | ||
514 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
515 | ||
516 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
517 | if (IS_ERR(req)) | |
518 | return PTR_ERR(req); | |
519 | ||
520 | ||
521 | /* if we haven't received a response for oldreq, | |
522 | remove it from the list. */ | |
523 | spin_lock(&c->lock); | |
524 | if (oldreq->status == REQ_STATUS_FLSH) | |
525 | list_del(&oldreq->req_list); | |
526 | spin_unlock(&c->lock); | |
527 | ||
528 | p9_free_req(c, req); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /** | |
533 | * p9_client_rpc - issue a request and wait for a response | |
534 | * @c: client session | |
535 | * @type: type of request | |
536 | * @fmt: protocol format string (see protocol.c) | |
537 | * | |
538 | * Returns request structure (which client must free using p9_free_req) | |
539 | */ | |
540 | ||
541 | static struct p9_req_t * | |
542 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
543 | { | |
544 | va_list ap; | |
545 | int tag, err; | |
546 | struct p9_req_t *req; | |
547 | unsigned long flags; | |
548 | int sigpending; | |
549 | ||
550 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); | |
551 | ||
552 | /* we allow for any status other than disconnected */ | |
553 | if (c->status == Disconnected) | |
554 | return ERR_PTR(-EIO); | |
555 | ||
556 | /* if status is begin_disconnected we allow only clunk request */ | |
557 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
558 | return ERR_PTR(-EIO); | |
559 | ||
560 | if (signal_pending(current)) { | |
561 | sigpending = 1; | |
562 | clear_thread_flag(TIF_SIGPENDING); | |
563 | } else | |
564 | sigpending = 0; | |
565 | ||
566 | tag = P9_NOTAG; | |
567 | if (type != P9_TVERSION) { | |
568 | tag = p9_idpool_get(c->tagpool); | |
569 | if (tag < 0) | |
570 | return ERR_PTR(-ENOMEM); | |
571 | } | |
572 | ||
573 | req = p9_tag_alloc(c, tag); | |
574 | if (IS_ERR(req)) | |
575 | return req; | |
576 | ||
577 | /* marshall the data */ | |
578 | p9pdu_prepare(req->tc, tag, type); | |
579 | va_start(ap, fmt); | |
580 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); | |
581 | va_end(ap); | |
582 | if (err) | |
583 | goto reterr; | |
584 | p9pdu_finalize(req->tc); | |
585 | ||
586 | err = c->trans_mod->request(c, req); | |
587 | if (err < 0) { | |
588 | if (err != -ERESTARTSYS) | |
589 | c->status = Disconnected; | |
590 | goto reterr; | |
591 | } | |
592 | ||
593 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); | |
594 | err = wait_event_interruptible(*req->wq, | |
595 | req->status >= REQ_STATUS_RCVD); | |
596 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", | |
597 | req->wq, tag, err); | |
598 | ||
599 | if (req->status == REQ_STATUS_ERROR) { | |
600 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); | |
601 | err = req->t_err; | |
602 | } | |
603 | ||
604 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
605 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); | |
606 | sigpending = 1; | |
607 | clear_thread_flag(TIF_SIGPENDING); | |
608 | ||
609 | if (c->trans_mod->cancel(c, req)) | |
610 | p9_client_flush(c, req); | |
611 | ||
612 | /* if we received the response anyway, don't signal error */ | |
613 | if (req->status == REQ_STATUS_RCVD) | |
614 | err = 0; | |
615 | } | |
616 | ||
617 | if (sigpending) { | |
618 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
619 | recalc_sigpending(); | |
620 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
621 | } | |
622 | ||
623 | if (err < 0) | |
624 | goto reterr; | |
625 | ||
626 | err = p9_check_errors(c, req); | |
627 | if (!err) { | |
628 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
629 | return req; | |
630 | } | |
631 | ||
632 | reterr: | |
633 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, | |
634 | err); | |
635 | p9_free_req(c, req); | |
636 | return ERR_PTR(err); | |
637 | } | |
638 | ||
639 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) | |
640 | { | |
641 | int ret; | |
642 | struct p9_fid *fid; | |
643 | unsigned long flags; | |
644 | ||
645 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); | |
646 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); | |
647 | if (!fid) | |
648 | return ERR_PTR(-ENOMEM); | |
649 | ||
650 | ret = p9_idpool_get(clnt->fidpool); | |
651 | if (ret < 0) { | |
652 | ret = -ENOSPC; | |
653 | goto error; | |
654 | } | |
655 | fid->fid = ret; | |
656 | ||
657 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
658 | fid->mode = -1; | |
659 | fid->uid = current_fsuid(); | |
660 | fid->clnt = clnt; | |
661 | fid->rdir = NULL; | |
662 | spin_lock_irqsave(&clnt->lock, flags); | |
663 | list_add(&fid->flist, &clnt->fidlist); | |
664 | spin_unlock_irqrestore(&clnt->lock, flags); | |
665 | ||
666 | return fid; | |
667 | ||
668 | error: | |
669 | kfree(fid); | |
670 | return ERR_PTR(ret); | |
671 | } | |
672 | ||
673 | static void p9_fid_destroy(struct p9_fid *fid) | |
674 | { | |
675 | struct p9_client *clnt; | |
676 | unsigned long flags; | |
677 | ||
678 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); | |
679 | clnt = fid->clnt; | |
680 | p9_idpool_put(fid->fid, clnt->fidpool); | |
681 | spin_lock_irqsave(&clnt->lock, flags); | |
682 | list_del(&fid->flist); | |
683 | spin_unlock_irqrestore(&clnt->lock, flags); | |
684 | kfree(fid->rdir); | |
685 | kfree(fid); | |
686 | } | |
687 | ||
688 | static int p9_client_version(struct p9_client *c) | |
689 | { | |
690 | int err = 0; | |
691 | struct p9_req_t *req; | |
692 | char *version; | |
693 | int msize; | |
694 | ||
695 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", | |
696 | c->msize, c->proto_version); | |
697 | ||
698 | switch (c->proto_version) { | |
699 | case p9_proto_2000L: | |
700 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
701 | c->msize, "9P2000.L"); | |
702 | break; | |
703 | case p9_proto_2000u: | |
704 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
705 | c->msize, "9P2000.u"); | |
706 | break; | |
707 | case p9_proto_legacy: | |
708 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
709 | c->msize, "9P2000"); | |
710 | break; | |
711 | default: | |
712 | return -EINVAL; | |
713 | break; | |
714 | } | |
715 | ||
716 | if (IS_ERR(req)) | |
717 | return PTR_ERR(req); | |
718 | ||
719 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); | |
720 | if (err) { | |
721 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
722 | p9pdu_dump(1, req->rc); | |
723 | goto error; | |
724 | } | |
725 | ||
726 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); | |
727 | if (!strncmp(version, "9P2000.L", 8)) | |
728 | c->proto_version = p9_proto_2000L; | |
729 | else if (!strncmp(version, "9P2000.u", 8)) | |
730 | c->proto_version = p9_proto_2000u; | |
731 | else if (!strncmp(version, "9P2000", 6)) | |
732 | c->proto_version = p9_proto_legacy; | |
733 | else { | |
734 | err = -EREMOTEIO; | |
735 | goto error; | |
736 | } | |
737 | ||
738 | if (msize < c->msize) | |
739 | c->msize = msize; | |
740 | ||
741 | error: | |
742 | kfree(version); | |
743 | p9_free_req(c, req); | |
744 | ||
745 | return err; | |
746 | } | |
747 | ||
748 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
749 | { | |
750 | int err; | |
751 | struct p9_client *clnt; | |
752 | ||
753 | err = 0; | |
754 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); | |
755 | if (!clnt) | |
756 | return ERR_PTR(-ENOMEM); | |
757 | ||
758 | clnt->trans_mod = NULL; | |
759 | clnt->trans = NULL; | |
760 | spin_lock_init(&clnt->lock); | |
761 | INIT_LIST_HEAD(&clnt->fidlist); | |
762 | ||
763 | p9_tag_init(clnt); | |
764 | ||
765 | err = parse_opts(options, clnt); | |
766 | if (err < 0) | |
767 | goto free_client; | |
768 | ||
769 | if (!clnt->trans_mod) | |
770 | clnt->trans_mod = v9fs_get_default_trans(); | |
771 | ||
772 | if (clnt->trans_mod == NULL) { | |
773 | err = -EPROTONOSUPPORT; | |
774 | P9_DPRINTK(P9_DEBUG_ERROR, | |
775 | "No transport defined or default transport\n"); | |
776 | goto free_client; | |
777 | } | |
778 | ||
779 | clnt->fidpool = p9_idpool_create(); | |
780 | if (IS_ERR(clnt->fidpool)) { | |
781 | err = PTR_ERR(clnt->fidpool); | |
782 | clnt->fidpool = NULL; | |
783 | goto put_trans; | |
784 | } | |
785 | ||
786 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", | |
787 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
788 | ||
789 | err = clnt->trans_mod->create(clnt, dev_name, options); | |
790 | if (err) | |
791 | goto destroy_fidpool; | |
792 | ||
793 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) | |
794 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
795 | ||
796 | err = p9_client_version(clnt); | |
797 | if (err) | |
798 | goto close_trans; | |
799 | ||
800 | return clnt; | |
801 | ||
802 | close_trans: | |
803 | clnt->trans_mod->close(clnt); | |
804 | destroy_fidpool: | |
805 | p9_idpool_destroy(clnt->fidpool); | |
806 | put_trans: | |
807 | v9fs_put_trans(clnt->trans_mod); | |
808 | free_client: | |
809 | kfree(clnt); | |
810 | return ERR_PTR(err); | |
811 | } | |
812 | EXPORT_SYMBOL(p9_client_create); | |
813 | ||
814 | void p9_client_destroy(struct p9_client *clnt) | |
815 | { | |
816 | struct p9_fid *fid, *fidptr; | |
817 | ||
818 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); | |
819 | ||
820 | if (clnt->trans_mod) | |
821 | clnt->trans_mod->close(clnt); | |
822 | ||
823 | v9fs_put_trans(clnt->trans_mod); | |
824 | ||
825 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { | |
826 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); | |
827 | p9_fid_destroy(fid); | |
828 | } | |
829 | ||
830 | if (clnt->fidpool) | |
831 | p9_idpool_destroy(clnt->fidpool); | |
832 | ||
833 | p9_tag_cleanup(clnt); | |
834 | ||
835 | kfree(clnt); | |
836 | } | |
837 | EXPORT_SYMBOL(p9_client_destroy); | |
838 | ||
839 | void p9_client_disconnect(struct p9_client *clnt) | |
840 | { | |
841 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
842 | clnt->status = Disconnected; | |
843 | } | |
844 | EXPORT_SYMBOL(p9_client_disconnect); | |
845 | ||
846 | void p9_client_begin_disconnect(struct p9_client *clnt) | |
847 | { | |
848 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
849 | clnt->status = BeginDisconnect; | |
850 | } | |
851 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
852 | ||
853 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, | |
854 | char *uname, u32 n_uname, char *aname) | |
855 | { | |
856 | int err; | |
857 | struct p9_req_t *req; | |
858 | struct p9_fid *fid; | |
859 | struct p9_qid qid; | |
860 | ||
861 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", | |
862 | afid ? afid->fid : -1, uname, aname); | |
863 | err = 0; | |
864 | ||
865 | fid = p9_fid_create(clnt); | |
866 | if (IS_ERR(fid)) { | |
867 | err = PTR_ERR(fid); | |
868 | fid = NULL; | |
869 | goto error; | |
870 | } | |
871 | ||
872 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, | |
873 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
874 | if (IS_ERR(req)) { | |
875 | err = PTR_ERR(req); | |
876 | goto error; | |
877 | } | |
878 | ||
879 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); | |
880 | if (err) { | |
881 | p9pdu_dump(1, req->rc); | |
882 | p9_free_req(clnt, req); | |
883 | goto error; | |
884 | } | |
885 | ||
886 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", | |
887 | qid.type, | |
888 | (unsigned long long)qid.path, | |
889 | qid.version); | |
890 | ||
891 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
892 | ||
893 | p9_free_req(clnt, req); | |
894 | return fid; | |
895 | ||
896 | error: | |
897 | if (fid) | |
898 | p9_fid_destroy(fid); | |
899 | return ERR_PTR(err); | |
900 | } | |
901 | EXPORT_SYMBOL(p9_client_attach); | |
902 | ||
903 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, | |
904 | int clone) | |
905 | { | |
906 | int err; | |
907 | struct p9_client *clnt; | |
908 | struct p9_fid *fid; | |
909 | struct p9_qid *wqids; | |
910 | struct p9_req_t *req; | |
911 | int16_t nwqids, count; | |
912 | ||
913 | err = 0; | |
914 | wqids = NULL; | |
915 | clnt = oldfid->clnt; | |
916 | if (clone) { | |
917 | fid = p9_fid_create(clnt); | |
918 | if (IS_ERR(fid)) { | |
919 | err = PTR_ERR(fid); | |
920 | fid = NULL; | |
921 | goto error; | |
922 | } | |
923 | ||
924 | fid->uid = oldfid->uid; | |
925 | } else | |
926 | fid = oldfid; | |
927 | ||
928 | ||
929 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
930 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
931 | ||
932 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
933 | nwname, wnames); | |
934 | if (IS_ERR(req)) { | |
935 | err = PTR_ERR(req); | |
936 | goto error; | |
937 | } | |
938 | ||
939 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); | |
940 | if (err) { | |
941 | p9pdu_dump(1, req->rc); | |
942 | p9_free_req(clnt, req); | |
943 | goto clunk_fid; | |
944 | } | |
945 | p9_free_req(clnt, req); | |
946 | ||
947 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); | |
948 | ||
949 | if (nwqids != nwname) { | |
950 | err = -ENOENT; | |
951 | goto clunk_fid; | |
952 | } | |
953 | ||
954 | for (count = 0; count < nwqids; count++) | |
955 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
956 | count, wqids[count].type, | |
957 | (unsigned long long)wqids[count].path, | |
958 | wqids[count].version); | |
959 | ||
960 | if (nwname) | |
961 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); | |
962 | else | |
963 | fid->qid = oldfid->qid; | |
964 | ||
965 | kfree(wqids); | |
966 | return fid; | |
967 | ||
968 | clunk_fid: | |
969 | kfree(wqids); | |
970 | p9_client_clunk(fid); | |
971 | fid = NULL; | |
972 | ||
973 | error: | |
974 | if (fid && (fid != oldfid)) | |
975 | p9_fid_destroy(fid); | |
976 | ||
977 | return ERR_PTR(err); | |
978 | } | |
979 | EXPORT_SYMBOL(p9_client_walk); | |
980 | ||
981 | int p9_client_open(struct p9_fid *fid, int mode) | |
982 | { | |
983 | int err; | |
984 | struct p9_client *clnt; | |
985 | struct p9_req_t *req; | |
986 | struct p9_qid qid; | |
987 | int iounit; | |
988 | ||
989 | clnt = fid->clnt; | |
990 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", | |
991 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); | |
992 | err = 0; | |
993 | ||
994 | if (fid->mode != -1) | |
995 | return -EINVAL; | |
996 | ||
997 | if (p9_is_proto_dotl(clnt)) | |
998 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
999 | else | |
1000 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
1001 | if (IS_ERR(req)) { | |
1002 | err = PTR_ERR(req); | |
1003 | goto error; | |
1004 | } | |
1005 | ||
1006 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); | |
1007 | if (err) { | |
1008 | p9pdu_dump(1, req->rc); | |
1009 | goto free_and_error; | |
1010 | } | |
1011 | ||
1012 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", | |
1013 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, | |
1014 | (unsigned long long)qid.path, qid.version, iounit); | |
1015 | ||
1016 | fid->mode = mode; | |
1017 | fid->iounit = iounit; | |
1018 | ||
1019 | free_and_error: | |
1020 | p9_free_req(clnt, req); | |
1021 | error: | |
1022 | return err; | |
1023 | } | |
1024 | EXPORT_SYMBOL(p9_client_open); | |
1025 | ||
1026 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, | |
1027 | gid_t gid, struct p9_qid *qid) | |
1028 | { | |
1029 | int err = 0; | |
1030 | struct p9_client *clnt; | |
1031 | struct p9_req_t *req; | |
1032 | int iounit; | |
1033 | ||
1034 | P9_DPRINTK(P9_DEBUG_9P, | |
1035 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", | |
1036 | ofid->fid, name, flags, mode, gid); | |
1037 | clnt = ofid->clnt; | |
1038 | ||
1039 | if (ofid->mode != -1) | |
1040 | return -EINVAL; | |
1041 | ||
1042 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, | |
1043 | mode, gid); | |
1044 | if (IS_ERR(req)) { | |
1045 | err = PTR_ERR(req); | |
1046 | goto error; | |
1047 | } | |
1048 | ||
1049 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1050 | if (err) { | |
1051 | p9pdu_dump(1, req->rc); | |
1052 | goto free_and_error; | |
1053 | } | |
1054 | ||
1055 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", | |
1056 | qid->type, | |
1057 | (unsigned long long)qid->path, | |
1058 | qid->version, iounit); | |
1059 | ||
1060 | ofid->mode = mode; | |
1061 | ofid->iounit = iounit; | |
1062 | ||
1063 | free_and_error: | |
1064 | p9_free_req(clnt, req); | |
1065 | error: | |
1066 | return err; | |
1067 | } | |
1068 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1069 | ||
1070 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, | |
1071 | char *extension) | |
1072 | { | |
1073 | int err; | |
1074 | struct p9_client *clnt; | |
1075 | struct p9_req_t *req; | |
1076 | struct p9_qid qid; | |
1077 | int iounit; | |
1078 | ||
1079 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", | |
1080 | fid->fid, name, perm, mode); | |
1081 | err = 0; | |
1082 | clnt = fid->clnt; | |
1083 | ||
1084 | if (fid->mode != -1) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, | |
1088 | mode, extension); | |
1089 | if (IS_ERR(req)) { | |
1090 | err = PTR_ERR(req); | |
1091 | goto error; | |
1092 | } | |
1093 | ||
1094 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); | |
1095 | if (err) { | |
1096 | p9pdu_dump(1, req->rc); | |
1097 | goto free_and_error; | |
1098 | } | |
1099 | ||
1100 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
1101 | qid.type, | |
1102 | (unsigned long long)qid.path, | |
1103 | qid.version, iounit); | |
1104 | ||
1105 | fid->mode = mode; | |
1106 | fid->iounit = iounit; | |
1107 | ||
1108 | free_and_error: | |
1109 | p9_free_req(clnt, req); | |
1110 | error: | |
1111 | return err; | |
1112 | } | |
1113 | EXPORT_SYMBOL(p9_client_fcreate); | |
1114 | ||
1115 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, | |
1116 | struct p9_qid *qid) | |
1117 | { | |
1118 | int err = 0; | |
1119 | struct p9_client *clnt; | |
1120 | struct p9_req_t *req; | |
1121 | ||
1122 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", | |
1123 | dfid->fid, name, symtgt); | |
1124 | clnt = dfid->clnt; | |
1125 | ||
1126 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, | |
1127 | gid); | |
1128 | if (IS_ERR(req)) { | |
1129 | err = PTR_ERR(req); | |
1130 | goto error; | |
1131 | } | |
1132 | ||
1133 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1134 | if (err) { | |
1135 | p9pdu_dump(1, req->rc); | |
1136 | goto free_and_error; | |
1137 | } | |
1138 | ||
1139 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", | |
1140 | qid->type, (unsigned long long)qid->path, qid->version); | |
1141 | ||
1142 | free_and_error: | |
1143 | p9_free_req(clnt, req); | |
1144 | error: | |
1145 | return err; | |
1146 | } | |
1147 | EXPORT_SYMBOL(p9_client_symlink); | |
1148 | ||
1149 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) | |
1150 | { | |
1151 | struct p9_client *clnt; | |
1152 | struct p9_req_t *req; | |
1153 | ||
1154 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", | |
1155 | dfid->fid, oldfid->fid, newname); | |
1156 | clnt = dfid->clnt; | |
1157 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1158 | newname); | |
1159 | if (IS_ERR(req)) | |
1160 | return PTR_ERR(req); | |
1161 | ||
1162 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); | |
1163 | p9_free_req(clnt, req); | |
1164 | return 0; | |
1165 | } | |
1166 | EXPORT_SYMBOL(p9_client_link); | |
1167 | ||
1168 | int p9_client_fsync(struct p9_fid *fid) | |
1169 | { | |
1170 | int err; | |
1171 | struct p9_client *clnt; | |
1172 | struct p9_req_t *req; | |
1173 | ||
1174 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d\n", fid->fid); | |
1175 | err = 0; | |
1176 | clnt = fid->clnt; | |
1177 | ||
1178 | req = p9_client_rpc(clnt, P9_TFSYNC, "d", fid->fid); | |
1179 | if (IS_ERR(req)) { | |
1180 | err = PTR_ERR(req); | |
1181 | goto error; | |
1182 | } | |
1183 | ||
1184 | P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); | |
1185 | ||
1186 | p9_free_req(clnt, req); | |
1187 | ||
1188 | error: | |
1189 | return err; | |
1190 | } | |
1191 | EXPORT_SYMBOL(p9_client_fsync); | |
1192 | ||
1193 | int p9_client_clunk(struct p9_fid *fid) | |
1194 | { | |
1195 | int err; | |
1196 | struct p9_client *clnt; | |
1197 | struct p9_req_t *req; | |
1198 | ||
1199 | if (!fid) { | |
1200 | P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); | |
1201 | dump_stack(); | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); | |
1206 | err = 0; | |
1207 | clnt = fid->clnt; | |
1208 | ||
1209 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); | |
1210 | if (IS_ERR(req)) { | |
1211 | err = PTR_ERR(req); | |
1212 | goto error; | |
1213 | } | |
1214 | ||
1215 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); | |
1216 | ||
1217 | p9_free_req(clnt, req); | |
1218 | p9_fid_destroy(fid); | |
1219 | ||
1220 | error: | |
1221 | return err; | |
1222 | } | |
1223 | EXPORT_SYMBOL(p9_client_clunk); | |
1224 | ||
1225 | int p9_client_remove(struct p9_fid *fid) | |
1226 | { | |
1227 | int err; | |
1228 | struct p9_client *clnt; | |
1229 | struct p9_req_t *req; | |
1230 | ||
1231 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); | |
1232 | err = 0; | |
1233 | clnt = fid->clnt; | |
1234 | ||
1235 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); | |
1236 | if (IS_ERR(req)) { | |
1237 | err = PTR_ERR(req); | |
1238 | goto error; | |
1239 | } | |
1240 | ||
1241 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); | |
1242 | ||
1243 | p9_free_req(clnt, req); | |
1244 | error: | |
1245 | p9_fid_destroy(fid); | |
1246 | return err; | |
1247 | } | |
1248 | EXPORT_SYMBOL(p9_client_remove); | |
1249 | ||
1250 | int | |
1251 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1252 | u32 count) | |
1253 | { | |
1254 | int err, rsize, total; | |
1255 | struct p9_client *clnt; | |
1256 | struct p9_req_t *req; | |
1257 | char *dataptr; | |
1258 | ||
1259 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, | |
1260 | (long long unsigned) offset, count); | |
1261 | err = 0; | |
1262 | clnt = fid->clnt; | |
1263 | total = 0; | |
1264 | ||
1265 | rsize = fid->iounit; | |
1266 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1267 | rsize = clnt->msize - P9_IOHDRSZ; | |
1268 | ||
1269 | if (count < rsize) | |
1270 | rsize = count; | |
1271 | ||
1272 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); | |
1273 | if (IS_ERR(req)) { | |
1274 | err = PTR_ERR(req); | |
1275 | goto error; | |
1276 | } | |
1277 | ||
1278 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
1279 | if (err) { | |
1280 | p9pdu_dump(1, req->rc); | |
1281 | goto free_and_error; | |
1282 | } | |
1283 | ||
1284 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); | |
1285 | ||
1286 | if (data) { | |
1287 | memmove(data, dataptr, count); | |
1288 | } | |
1289 | ||
1290 | if (udata) { | |
1291 | err = copy_to_user(udata, dataptr, count); | |
1292 | if (err) { | |
1293 | err = -EFAULT; | |
1294 | goto free_and_error; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | p9_free_req(clnt, req); | |
1299 | return count; | |
1300 | ||
1301 | free_and_error: | |
1302 | p9_free_req(clnt, req); | |
1303 | error: | |
1304 | return err; | |
1305 | } | |
1306 | EXPORT_SYMBOL(p9_client_read); | |
1307 | ||
1308 | int | |
1309 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, | |
1310 | u64 offset, u32 count) | |
1311 | { | |
1312 | int err, rsize, total; | |
1313 | struct p9_client *clnt; | |
1314 | struct p9_req_t *req; | |
1315 | ||
1316 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", | |
1317 | fid->fid, (long long unsigned) offset, count); | |
1318 | err = 0; | |
1319 | clnt = fid->clnt; | |
1320 | total = 0; | |
1321 | ||
1322 | rsize = fid->iounit; | |
1323 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1324 | rsize = clnt->msize - P9_IOHDRSZ; | |
1325 | ||
1326 | if (count < rsize) | |
1327 | rsize = count; | |
1328 | if (data) | |
1329 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1330 | rsize, data); | |
1331 | else | |
1332 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1333 | rsize, udata); | |
1334 | if (IS_ERR(req)) { | |
1335 | err = PTR_ERR(req); | |
1336 | goto error; | |
1337 | } | |
1338 | ||
1339 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); | |
1340 | if (err) { | |
1341 | p9pdu_dump(1, req->rc); | |
1342 | goto free_and_error; | |
1343 | } | |
1344 | ||
1345 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); | |
1346 | ||
1347 | p9_free_req(clnt, req); | |
1348 | return count; | |
1349 | ||
1350 | free_and_error: | |
1351 | p9_free_req(clnt, req); | |
1352 | error: | |
1353 | return err; | |
1354 | } | |
1355 | EXPORT_SYMBOL(p9_client_write); | |
1356 | ||
1357 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) | |
1358 | { | |
1359 | int err; | |
1360 | struct p9_client *clnt; | |
1361 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1362 | struct p9_req_t *req; | |
1363 | u16 ignored; | |
1364 | ||
1365 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); | |
1366 | ||
1367 | if (!ret) | |
1368 | return ERR_PTR(-ENOMEM); | |
1369 | ||
1370 | err = 0; | |
1371 | clnt = fid->clnt; | |
1372 | ||
1373 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); | |
1374 | if (IS_ERR(req)) { | |
1375 | err = PTR_ERR(req); | |
1376 | goto error; | |
1377 | } | |
1378 | ||
1379 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); | |
1380 | if (err) { | |
1381 | p9pdu_dump(1, req->rc); | |
1382 | p9_free_req(clnt, req); | |
1383 | goto error; | |
1384 | } | |
1385 | ||
1386 | P9_DPRINTK(P9_DEBUG_9P, | |
1387 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1388 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1389 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1390 | "<<< uid=%d gid=%d n_muid=%d\n", | |
1391 | ret->size, ret->type, ret->dev, ret->qid.type, | |
1392 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, | |
1393 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1394 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
1395 | ret->n_uid, ret->n_gid, ret->n_muid); | |
1396 | ||
1397 | p9_free_req(clnt, req); | |
1398 | return ret; | |
1399 | ||
1400 | error: | |
1401 | kfree(ret); | |
1402 | return ERR_PTR(err); | |
1403 | } | |
1404 | EXPORT_SYMBOL(p9_client_stat); | |
1405 | ||
1406 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, | |
1407 | u64 request_mask) | |
1408 | { | |
1409 | int err; | |
1410 | struct p9_client *clnt; | |
1411 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1412 | GFP_KERNEL); | |
1413 | struct p9_req_t *req; | |
1414 | ||
1415 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", | |
1416 | fid->fid, request_mask); | |
1417 | ||
1418 | if (!ret) | |
1419 | return ERR_PTR(-ENOMEM); | |
1420 | ||
1421 | err = 0; | |
1422 | clnt = fid->clnt; | |
1423 | ||
1424 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1425 | if (IS_ERR(req)) { | |
1426 | err = PTR_ERR(req); | |
1427 | goto error; | |
1428 | } | |
1429 | ||
1430 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1431 | if (err) { | |
1432 | p9pdu_dump(1, req->rc); | |
1433 | p9_free_req(clnt, req); | |
1434 | goto error; | |
1435 | } | |
1436 | ||
1437 | P9_DPRINTK(P9_DEBUG_9P, | |
1438 | "<<< RGETATTR st_result_mask=%lld\n" | |
1439 | "<<< qid=%x.%llx.%x\n" | |
1440 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1441 | "<<< st_uid=%d st_gid=%d\n" | |
1442 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1443 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1444 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1445 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1446 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1447 | "<<< st_gen=%lld st_data_version=%lld", | |
1448 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
1449 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, | |
1450 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, | |
1451 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, | |
1452 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1453 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1454 | ret->st_gen, ret->st_data_version); | |
1455 | ||
1456 | p9_free_req(clnt, req); | |
1457 | return ret; | |
1458 | ||
1459 | error: | |
1460 | kfree(ret); | |
1461 | return ERR_PTR(err); | |
1462 | } | |
1463 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1464 | ||
1465 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) | |
1466 | { | |
1467 | int ret; | |
1468 | ||
1469 | /* NOTE: size shouldn't include its own length */ | |
1470 | /* size[2] type[2] dev[4] qid[13] */ | |
1471 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1472 | /* name[s] uid[s] gid[s] muid[s] */ | |
1473 | ret = 2+4+13+4+4+4+8+2+2+2+2; | |
1474 | ||
1475 | if (wst->name) | |
1476 | ret += strlen(wst->name); | |
1477 | if (wst->uid) | |
1478 | ret += strlen(wst->uid); | |
1479 | if (wst->gid) | |
1480 | ret += strlen(wst->gid); | |
1481 | if (wst->muid) | |
1482 | ret += strlen(wst->muid); | |
1483 | ||
1484 | if ((proto_version == p9_proto_2000u) || | |
1485 | (proto_version == p9_proto_2000L)) { | |
1486 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ | |
1487 | if (wst->extension) | |
1488 | ret += strlen(wst->extension); | |
1489 | } | |
1490 | ||
1491 | return ret; | |
1492 | } | |
1493 | ||
1494 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) | |
1495 | { | |
1496 | int err; | |
1497 | struct p9_req_t *req; | |
1498 | struct p9_client *clnt; | |
1499 | ||
1500 | err = 0; | |
1501 | clnt = fid->clnt; | |
1502 | wst->size = p9_client_statsize(wst, clnt->proto_version); | |
1503 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); | |
1504 | P9_DPRINTK(P9_DEBUG_9P, | |
1505 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1506 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1507 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1508 | " uid=%d gid=%d n_muid=%d\n", | |
1509 | wst->size, wst->type, wst->dev, wst->qid.type, | |
1510 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, | |
1511 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1512 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
1513 | wst->n_uid, wst->n_gid, wst->n_muid); | |
1514 | ||
1515 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); | |
1516 | if (IS_ERR(req)) { | |
1517 | err = PTR_ERR(req); | |
1518 | goto error; | |
1519 | } | |
1520 | ||
1521 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); | |
1522 | ||
1523 | p9_free_req(clnt, req); | |
1524 | error: | |
1525 | return err; | |
1526 | } | |
1527 | EXPORT_SYMBOL(p9_client_wstat); | |
1528 | ||
1529 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) | |
1530 | { | |
1531 | int err; | |
1532 | struct p9_req_t *req; | |
1533 | struct p9_client *clnt; | |
1534 | ||
1535 | err = 0; | |
1536 | clnt = fid->clnt; | |
1537 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); | |
1538 | P9_DPRINTK(P9_DEBUG_9P, | |
1539 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" | |
1540 | " atime_sec=%lld atime_nsec=%lld\n" | |
1541 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
1542 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, | |
1543 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, | |
1544 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1545 | ||
1546 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1547 | ||
1548 | if (IS_ERR(req)) { | |
1549 | err = PTR_ERR(req); | |
1550 | goto error; | |
1551 | } | |
1552 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); | |
1553 | p9_free_req(clnt, req); | |
1554 | error: | |
1555 | return err; | |
1556 | } | |
1557 | EXPORT_SYMBOL(p9_client_setattr); | |
1558 | ||
1559 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) | |
1560 | { | |
1561 | int err; | |
1562 | struct p9_req_t *req; | |
1563 | struct p9_client *clnt; | |
1564 | ||
1565 | err = 0; | |
1566 | clnt = fid->clnt; | |
1567 | ||
1568 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); | |
1569 | ||
1570 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1571 | if (IS_ERR(req)) { | |
1572 | err = PTR_ERR(req); | |
1573 | goto error; | |
1574 | } | |
1575 | ||
1576 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1577 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1578 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1579 | if (err) { | |
1580 | p9pdu_dump(1, req->rc); | |
1581 | p9_free_req(clnt, req); | |
1582 | goto error; | |
1583 | } | |
1584 | ||
1585 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " | |
1586 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " | |
1587 | "fsid %llu namelen %ld\n", | |
1588 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1589 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1590 | sb->fsid, (long int)sb->namelen); | |
1591 | ||
1592 | p9_free_req(clnt, req); | |
1593 | error: | |
1594 | return err; | |
1595 | } | |
1596 | EXPORT_SYMBOL(p9_client_statfs); | |
1597 | ||
1598 | int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) | |
1599 | { | |
1600 | int err; | |
1601 | struct p9_req_t *req; | |
1602 | struct p9_client *clnt; | |
1603 | ||
1604 | err = 0; | |
1605 | clnt = fid->clnt; | |
1606 | ||
1607 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", | |
1608 | fid->fid, newdirfid->fid, name); | |
1609 | ||
1610 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1611 | newdirfid->fid, name); | |
1612 | if (IS_ERR(req)) { | |
1613 | err = PTR_ERR(req); | |
1614 | goto error; | |
1615 | } | |
1616 | ||
1617 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); | |
1618 | ||
1619 | p9_free_req(clnt, req); | |
1620 | error: | |
1621 | return err; | |
1622 | } | |
1623 | EXPORT_SYMBOL(p9_client_rename); | |
1624 | ||
1625 | /* | |
1626 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1627 | */ | |
1628 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1629 | const char *attr_name, u64 *attr_size) | |
1630 | { | |
1631 | int err; | |
1632 | struct p9_req_t *req; | |
1633 | struct p9_client *clnt; | |
1634 | struct p9_fid *attr_fid; | |
1635 | ||
1636 | err = 0; | |
1637 | clnt = file_fid->clnt; | |
1638 | attr_fid = p9_fid_create(clnt); | |
1639 | if (IS_ERR(attr_fid)) { | |
1640 | err = PTR_ERR(attr_fid); | |
1641 | attr_fid = NULL; | |
1642 | goto error; | |
1643 | } | |
1644 | P9_DPRINTK(P9_DEBUG_9P, | |
1645 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", | |
1646 | file_fid->fid, attr_fid->fid, attr_name); | |
1647 | ||
1648 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1649 | file_fid->fid, attr_fid->fid, attr_name); | |
1650 | if (IS_ERR(req)) { | |
1651 | err = PTR_ERR(req); | |
1652 | goto error; | |
1653 | } | |
1654 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
1655 | if (err) { | |
1656 | p9pdu_dump(1, req->rc); | |
1657 | p9_free_req(clnt, req); | |
1658 | goto clunk_fid; | |
1659 | } | |
1660 | p9_free_req(clnt, req); | |
1661 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", | |
1662 | attr_fid->fid, *attr_size); | |
1663 | return attr_fid; | |
1664 | clunk_fid: | |
1665 | p9_client_clunk(attr_fid); | |
1666 | attr_fid = NULL; | |
1667 | error: | |
1668 | if (attr_fid && (attr_fid != file_fid)) | |
1669 | p9_fid_destroy(attr_fid); | |
1670 | ||
1671 | return ERR_PTR(err); | |
1672 | } | |
1673 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
1674 | ||
1675 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, | |
1676 | u64 attr_size, int flags) | |
1677 | { | |
1678 | int err; | |
1679 | struct p9_req_t *req; | |
1680 | struct p9_client *clnt; | |
1681 | ||
1682 | P9_DPRINTK(P9_DEBUG_9P, | |
1683 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", | |
1684 | fid->fid, name, (long long)attr_size, flags); | |
1685 | err = 0; | |
1686 | clnt = fid->clnt; | |
1687 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
1688 | fid->fid, name, attr_size, flags); | |
1689 | if (IS_ERR(req)) { | |
1690 | err = PTR_ERR(req); | |
1691 | goto error; | |
1692 | } | |
1693 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); | |
1694 | p9_free_req(clnt, req); | |
1695 | error: | |
1696 | return err; | |
1697 | } | |
1698 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
1699 | ||
1700 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) | |
1701 | { | |
1702 | int err, rsize, total; | |
1703 | struct p9_client *clnt; | |
1704 | struct p9_req_t *req; | |
1705 | char *dataptr; | |
1706 | ||
1707 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", | |
1708 | fid->fid, (long long unsigned) offset, count); | |
1709 | ||
1710 | err = 0; | |
1711 | clnt = fid->clnt; | |
1712 | total = 0; | |
1713 | ||
1714 | rsize = fid->iounit; | |
1715 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
1716 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
1717 | ||
1718 | if (count < rsize) | |
1719 | rsize = count; | |
1720 | ||
1721 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); | |
1722 | if (IS_ERR(req)) { | |
1723 | err = PTR_ERR(req); | |
1724 | goto error; | |
1725 | } | |
1726 | ||
1727 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
1728 | if (err) { | |
1729 | p9pdu_dump(1, req->rc); | |
1730 | goto free_and_error; | |
1731 | } | |
1732 | ||
1733 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); | |
1734 | ||
1735 | if (data) | |
1736 | memmove(data, dataptr, count); | |
1737 | ||
1738 | p9_free_req(clnt, req); | |
1739 | return count; | |
1740 | ||
1741 | free_and_error: | |
1742 | p9_free_req(clnt, req); | |
1743 | error: | |
1744 | return err; | |
1745 | } | |
1746 | EXPORT_SYMBOL(p9_client_readdir); | |
1747 | ||
1748 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
1749 | dev_t rdev, gid_t gid, struct p9_qid *qid) | |
1750 | { | |
1751 | int err; | |
1752 | struct p9_client *clnt; | |
1753 | struct p9_req_t *req; | |
1754 | ||
1755 | err = 0; | |
1756 | clnt = fid->clnt; | |
1757 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " | |
1758 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); | |
1759 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, | |
1760 | MAJOR(rdev), MINOR(rdev), gid); | |
1761 | if (IS_ERR(req)) | |
1762 | return PTR_ERR(req); | |
1763 | ||
1764 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1765 | if (err) { | |
1766 | p9pdu_dump(1, req->rc); | |
1767 | goto error; | |
1768 | } | |
1769 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, | |
1770 | (unsigned long long)qid->path, qid->version); | |
1771 | ||
1772 | error: | |
1773 | p9_free_req(clnt, req); | |
1774 | return err; | |
1775 | ||
1776 | } | |
1777 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
1778 | ||
1779 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
1780 | gid_t gid, struct p9_qid *qid) | |
1781 | { | |
1782 | int err; | |
1783 | struct p9_client *clnt; | |
1784 | struct p9_req_t *req; | |
1785 | ||
1786 | err = 0; | |
1787 | clnt = fid->clnt; | |
1788 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", | |
1789 | fid->fid, name, mode, gid); | |
1790 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, | |
1791 | gid); | |
1792 | if (IS_ERR(req)) | |
1793 | return PTR_ERR(req); | |
1794 | ||
1795 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1796 | if (err) { | |
1797 | p9pdu_dump(1, req->rc); | |
1798 | goto error; | |
1799 | } | |
1800 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, | |
1801 | (unsigned long long)qid->path, qid->version); | |
1802 | ||
1803 | error: | |
1804 | p9_free_req(clnt, req); | |
1805 | return err; | |
1806 | ||
1807 | } | |
1808 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
1809 | ||
1810 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
1811 | { | |
1812 | int err; | |
1813 | struct p9_client *clnt; | |
1814 | struct p9_req_t *req; | |
1815 | ||
1816 | err = 0; | |
1817 | clnt = fid->clnt; | |
1818 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " | |
1819 | "start %lld length %lld proc_id %d client_id %s\n", | |
1820 | fid->fid, flock->type, flock->flags, flock->start, | |
1821 | flock->length, flock->proc_id, flock->client_id); | |
1822 | ||
1823 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
1824 | flock->flags, flock->start, flock->length, | |
1825 | flock->proc_id, flock->client_id); | |
1826 | ||
1827 | if (IS_ERR(req)) | |
1828 | return PTR_ERR(req); | |
1829 | ||
1830 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
1831 | if (err) { | |
1832 | p9pdu_dump(1, req->rc); | |
1833 | goto error; | |
1834 | } | |
1835 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); | |
1836 | error: | |
1837 | p9_free_req(clnt, req); | |
1838 | return err; | |
1839 | ||
1840 | } | |
1841 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1842 | ||
1843 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
1844 | { | |
1845 | int err; | |
1846 | struct p9_client *clnt; | |
1847 | struct p9_req_t *req; | |
1848 | ||
1849 | err = 0; | |
1850 | clnt = fid->clnt; | |
1851 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " | |
1852 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, | |
1853 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
1854 | ||
1855 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
1856 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
1857 | ||
1858 | if (IS_ERR(req)) | |
1859 | return PTR_ERR(req); | |
1860 | ||
1861 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
1862 | &glock->start, &glock->length, &glock->proc_id, | |
1863 | &glock->client_id); | |
1864 | if (err) { | |
1865 | p9pdu_dump(1, req->rc); | |
1866 | goto error; | |
1867 | } | |
1868 | P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " | |
1869 | "proc_id %d client_id %s\n", glock->type, glock->start, | |
1870 | glock->length, glock->proc_id, glock->client_id); | |
1871 | error: | |
1872 | p9_free_req(clnt, req); | |
1873 | return err; | |
1874 | } | |
1875 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
1876 | ||
1877 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
1878 | { | |
1879 | int err; | |
1880 | struct p9_client *clnt; | |
1881 | struct p9_req_t *req; | |
1882 | ||
1883 | err = 0; | |
1884 | clnt = fid->clnt; | |
1885 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); | |
1886 | ||
1887 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
1888 | if (IS_ERR(req)) | |
1889 | return PTR_ERR(req); | |
1890 | ||
1891 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
1892 | if (err) { | |
1893 | p9pdu_dump(1, req->rc); | |
1894 | goto error; | |
1895 | } | |
1896 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); | |
1897 | error: | |
1898 | p9_free_req(clnt, req); | |
1899 | return err; | |
1900 | } | |
1901 | EXPORT_SYMBOL(p9_client_readlink); |