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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_destroy(c->tagpool); |
336 | |
337 | /* free requests associated with tags */ |
338 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
339 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
340 | kfree(c->reqs[row][col].wq); |
341 | kfree(c->reqs[row][col].tc); |
342 | kfree(c->reqs[row][col].rc); |
343 | } |
344 | kfree(c->reqs[row]); |
345 | } |
346 | c->max_tag = 0; |
347 | } |
348 | |
349 | /** |
350 | * p9_free_req - free a request and clean-up as necessary |
351 | * c: client state |
352 | * r: request to release |
353 | * |
354 | */ |
355 | |
356 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
357 | { |
358 | int tag = r->tc->tag; |
359 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
360 | |
361 | r->status = REQ_STATUS_IDLE; |
362 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
363 | p9_idpool_put(tag, c->tagpool); |
364 | } |
365 | |
366 | /** |
367 | * p9_client_cb - call back from transport to client |
368 | * c: client state |
369 | * req: request received |
370 | * |
371 | */ |
372 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) |
373 | { |
374 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
375 | wake_up(req->wq); |
376 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
377 | } |
378 | EXPORT_SYMBOL(p9_client_cb); |
379 | |
380 | /** |
381 | * p9_parse_header - parse header arguments out of a packet |
382 | * @pdu: packet to parse |
383 | * @size: size of packet |
384 | * @type: type of request |
385 | * @tag: tag of packet |
386 | * @rewind: set if we need to rewind offset afterwards |
387 | */ |
388 | |
389 | int |
390 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, |
391 | int rewind) |
392 | { |
393 | int8_t r_type; |
394 | int16_t r_tag; |
395 | int32_t r_size; |
396 | int offset = pdu->offset; |
397 | int err; |
398 | |
399 | pdu->offset = 0; |
400 | if (pdu->size == 0) |
401 | pdu->size = 7; |
402 | |
403 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); |
404 | if (err) |
405 | goto rewind_and_exit; |
406 | |
407 | pdu->size = r_size; |
408 | pdu->id = r_type; |
409 | pdu->tag = r_tag; |
410 | |
411 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
412 | pdu->id, pdu->tag); |
413 | |
414 | if (type) |
415 | *type = r_type; |
416 | if (tag) |
417 | *tag = r_tag; |
418 | if (size) |
419 | *size = r_size; |
420 | |
421 | |
422 | rewind_and_exit: |
423 | if (rewind) |
424 | pdu->offset = offset; |
425 | return err; |
426 | } |
427 | EXPORT_SYMBOL(p9_parse_header); |
428 | |
429 | /** |
430 | * p9_check_errors - check 9p packet for error return and process it |
431 | * @c: current client instance |
432 | * @req: request to parse and check for error conditions |
433 | * |
434 | * returns error code if one is discovered, otherwise returns 0 |
435 | * |
436 | * this will have to be more complicated if we have multiple |
437 | * error packet types |
438 | */ |
439 | |
440 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) |
441 | { |
442 | int8_t type; |
443 | int err; |
444 | |
445 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
446 | if (err) { |
447 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
448 | return err; |
449 | } |
450 | |
451 | if (type == P9_RERROR) { |
452 | int ecode; |
453 | char *ename; |
454 | |
455 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
456 | &ename, &ecode); |
457 | if (err) { |
458 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", |
459 | err); |
460 | return err; |
461 | } |
462 | |
463 | if (p9_is_proto_dotu(c)) |
464 | err = -ecode; |
465 | |
466 | if (!err || !IS_ERR_VALUE(err)) |
467 | err = p9_errstr2errno(ename, strlen(ename)); |
468 | |
469 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); |
470 | |
471 | kfree(ename); |
472 | } else |
473 | err = 0; |
474 | |
475 | return err; |
476 | } |
477 | |
478 | /** |
479 | * p9_client_flush - flush (cancel) a request |
480 | * @c: client state |
481 | * @oldreq: request to cancel |
482 | * |
483 | * This sents a flush for a particular requests and links |
484 | * the flush request to the original request. The current |
485 | * code only supports a single flush request although the protocol |
486 | * allows for multiple flush requests to be sent for a single request. |
487 | * |
488 | */ |
489 | |
490 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) |
491 | { |
492 | struct p9_req_t *req; |
493 | int16_t oldtag; |
494 | int err; |
495 | |
496 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); |
497 | if (err) |
498 | return err; |
499 | |
500 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
501 | |
502 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); |
503 | if (IS_ERR(req)) |
504 | return PTR_ERR(req); |
505 | |
506 | |
507 | /* if we haven't received a response for oldreq, |
508 | remove it from the list. */ |
509 | spin_lock(&c->lock); |
510 | if (oldreq->status == REQ_STATUS_FLSH) |
511 | list_del(&oldreq->req_list); |
512 | spin_unlock(&c->lock); |
513 | |
514 | p9_free_req(c, req); |
515 | return 0; |
516 | } |
517 | |
518 | /** |
519 | * p9_client_rpc - issue a request and wait for a response |
520 | * @c: client session |
521 | * @type: type of request |
522 | * @fmt: protocol format string (see protocol.c) |
523 | * |
524 | * Returns request structure (which client must free using p9_free_req) |
525 | */ |
526 | |
527 | static struct p9_req_t * |
528 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) |
529 | { |
530 | va_list ap; |
531 | int tag, err; |
532 | struct p9_req_t *req; |
533 | unsigned long flags; |
534 | int sigpending; |
535 | |
536 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
537 | |
538 | /* we allow for any status other than disconnected */ |
539 | if (c->status == Disconnected) |
540 | return ERR_PTR(-EIO); |
541 | |
542 | /* if status is begin_disconnected we allow only clunk request */ |
543 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) |
544 | return ERR_PTR(-EIO); |
545 | |
546 | if (signal_pending(current)) { |
547 | sigpending = 1; |
548 | clear_thread_flag(TIF_SIGPENDING); |
549 | } else |
550 | sigpending = 0; |
551 | |
552 | tag = P9_NOTAG; |
553 | if (type != P9_TVERSION) { |
554 | tag = p9_idpool_get(c->tagpool); |
555 | if (tag < 0) |
556 | return ERR_PTR(-ENOMEM); |
557 | } |
558 | |
559 | req = p9_tag_alloc(c, tag); |
560 | if (IS_ERR(req)) |
561 | return req; |
562 | |
563 | /* marshall the data */ |
564 | p9pdu_prepare(req->tc, tag, type); |
565 | va_start(ap, fmt); |
566 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
567 | va_end(ap); |
568 | p9pdu_finalize(req->tc); |
569 | |
570 | err = c->trans_mod->request(c, req); |
571 | if (err < 0) { |
572 | c->status = Disconnected; |
573 | goto reterr; |
574 | } |
575 | |
576 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
577 | err = wait_event_interruptible(*req->wq, |
578 | req->status >= REQ_STATUS_RCVD); |
579 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
580 | req->wq, tag, err); |
581 | |
582 | if (req->status == REQ_STATUS_ERROR) { |
583 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
584 | err = req->t_err; |
585 | } |
586 | |
587 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
588 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
589 | sigpending = 1; |
590 | clear_thread_flag(TIF_SIGPENDING); |
591 | |
592 | if (c->trans_mod->cancel(c, req)) |
593 | p9_client_flush(c, req); |
594 | |
595 | /* if we received the response anyway, don't signal error */ |
596 | if (req->status == REQ_STATUS_RCVD) |
597 | err = 0; |
598 | } |
599 | |
600 | if (sigpending) { |
601 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
602 | recalc_sigpending(); |
603 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
604 | } |
605 | |
606 | if (err < 0) |
607 | goto reterr; |
608 | |
609 | err = p9_check_errors(c, req); |
610 | if (!err) { |
611 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); |
612 | return req; |
613 | } |
614 | |
615 | reterr: |
616 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
617 | err); |
618 | p9_free_req(c, req); |
619 | return ERR_PTR(err); |
620 | } |
621 | |
622 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
623 | { |
624 | int ret; |
625 | struct p9_fid *fid; |
626 | unsigned long flags; |
627 | |
628 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
629 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
630 | if (!fid) |
631 | return ERR_PTR(-ENOMEM); |
632 | |
633 | ret = p9_idpool_get(clnt->fidpool); |
634 | if (ret < 0) { |
635 | ret = -ENOSPC; |
636 | goto error; |
637 | } |
638 | fid->fid = ret; |
639 | |
640 | memset(&fid->qid, 0, sizeof(struct p9_qid)); |
641 | fid->mode = -1; |
642 | fid->uid = current_fsuid(); |
643 | fid->clnt = clnt; |
644 | fid->rdir = NULL; |
645 | spin_lock_irqsave(&clnt->lock, flags); |
646 | list_add(&fid->flist, &clnt->fidlist); |
647 | spin_unlock_irqrestore(&clnt->lock, flags); |
648 | |
649 | return fid; |
650 | |
651 | error: |
652 | kfree(fid); |
653 | return ERR_PTR(ret); |
654 | } |
655 | |
656 | static void p9_fid_destroy(struct p9_fid *fid) |
657 | { |
658 | struct p9_client *clnt; |
659 | unsigned long flags; |
660 | |
661 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
662 | clnt = fid->clnt; |
663 | p9_idpool_put(fid->fid, clnt->fidpool); |
664 | spin_lock_irqsave(&clnt->lock, flags); |
665 | list_del(&fid->flist); |
666 | spin_unlock_irqrestore(&clnt->lock, flags); |
667 | kfree(fid->rdir); |
668 | kfree(fid); |
669 | } |
670 | |
671 | int p9_client_version(struct p9_client *c) |
672 | { |
673 | int err = 0; |
674 | struct p9_req_t *req; |
675 | char *version; |
676 | int msize; |
677 | |
678 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
679 | c->msize, c->proto_version); |
680 | |
681 | switch (c->proto_version) { |
682 | case p9_proto_2000L: |
683 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
684 | c->msize, "9P2000.L"); |
685 | break; |
686 | case p9_proto_2000u: |
687 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
688 | c->msize, "9P2000.u"); |
689 | break; |
690 | case p9_proto_legacy: |
691 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
692 | c->msize, "9P2000"); |
693 | break; |
694 | default: |
695 | return -EINVAL; |
696 | break; |
697 | } |
698 | |
699 | if (IS_ERR(req)) |
700 | return PTR_ERR(req); |
701 | |
702 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
703 | if (err) { |
704 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); |
705 | p9pdu_dump(1, req->rc); |
706 | goto error; |
707 | } |
708 | |
709 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
710 | if (!strncmp(version, "9P2000.L", 8)) |
711 | c->proto_version = p9_proto_2000L; |
712 | else if (!strncmp(version, "9P2000.u", 8)) |
713 | c->proto_version = p9_proto_2000u; |
714 | else if (!strncmp(version, "9P2000", 6)) |
715 | c->proto_version = p9_proto_legacy; |
716 | else { |
717 | err = -EREMOTEIO; |
718 | goto error; |
719 | } |
720 | |
721 | if (msize < c->msize) |
722 | c->msize = msize; |
723 | |
724 | error: |
725 | kfree(version); |
726 | p9_free_req(c, req); |
727 | |
728 | return err; |
729 | } |
730 | EXPORT_SYMBOL(p9_client_version); |
731 | |
732 | struct p9_client *p9_client_create(const char *dev_name, char *options) |
733 | { |
734 | int err; |
735 | struct p9_client *clnt; |
736 | |
737 | err = 0; |
738 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
739 | if (!clnt) |
740 | return ERR_PTR(-ENOMEM); |
741 | |
742 | clnt->trans_mod = NULL; |
743 | clnt->trans = NULL; |
744 | spin_lock_init(&clnt->lock); |
745 | INIT_LIST_HEAD(&clnt->fidlist); |
746 | |
747 | p9_tag_init(clnt); |
748 | |
749 | err = parse_opts(options, clnt); |
750 | if (err < 0) |
751 | goto free_client; |
752 | |
753 | if (!clnt->trans_mod) |
754 | clnt->trans_mod = v9fs_get_default_trans(); |
755 | |
756 | if (clnt->trans_mod == NULL) { |
757 | err = -EPROTONOSUPPORT; |
758 | P9_DPRINTK(P9_DEBUG_ERROR, |
759 | "No transport defined or default transport\n"); |
760 | goto free_client; |
761 | } |
762 | |
763 | clnt->fidpool = p9_idpool_create(); |
764 | if (IS_ERR(clnt->fidpool)) { |
765 | err = PTR_ERR(clnt->fidpool); |
766 | clnt->fidpool = NULL; |
767 | goto put_trans; |
768 | } |
769 | |
770 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
771 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); |
772 | |
773 | err = clnt->trans_mod->create(clnt, dev_name, options); |
774 | if (err) |
775 | goto destroy_fidpool; |
776 | |
777 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
778 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; |
779 | |
780 | err = p9_client_version(clnt); |
781 | if (err) |
782 | goto close_trans; |
783 | |
784 | return clnt; |
785 | |
786 | close_trans: |
787 | clnt->trans_mod->close(clnt); |
788 | destroy_fidpool: |
789 | p9_idpool_destroy(clnt->fidpool); |
790 | put_trans: |
791 | v9fs_put_trans(clnt->trans_mod); |
792 | free_client: |
793 | kfree(clnt); |
794 | return ERR_PTR(err); |
795 | } |
796 | EXPORT_SYMBOL(p9_client_create); |
797 | |
798 | void p9_client_destroy(struct p9_client *clnt) |
799 | { |
800 | struct p9_fid *fid, *fidptr; |
801 | |
802 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
803 | |
804 | if (clnt->trans_mod) |
805 | clnt->trans_mod->close(clnt); |
806 | |
807 | v9fs_put_trans(clnt->trans_mod); |
808 | |
809 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
810 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); |
811 | p9_fid_destroy(fid); |
812 | } |
813 | |
814 | if (clnt->fidpool) |
815 | p9_idpool_destroy(clnt->fidpool); |
816 | |
817 | p9_tag_cleanup(clnt); |
818 | |
819 | kfree(clnt); |
820 | } |
821 | EXPORT_SYMBOL(p9_client_destroy); |
822 | |
823 | void p9_client_disconnect(struct p9_client *clnt) |
824 | { |
825 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
826 | clnt->status = Disconnected; |
827 | } |
828 | EXPORT_SYMBOL(p9_client_disconnect); |
829 | |
830 | void p9_client_begin_disconnect(struct p9_client *clnt) |
831 | { |
832 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
833 | clnt->status = BeginDisconnect; |
834 | } |
835 | EXPORT_SYMBOL(p9_client_begin_disconnect); |
836 | |
837 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
838 | char *uname, u32 n_uname, char *aname) |
839 | { |
840 | int err; |
841 | struct p9_req_t *req; |
842 | struct p9_fid *fid; |
843 | struct p9_qid qid; |
844 | |
845 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
846 | afid ? afid->fid : -1, uname, aname); |
847 | err = 0; |
848 | |
849 | fid = p9_fid_create(clnt); |
850 | if (IS_ERR(fid)) { |
851 | err = PTR_ERR(fid); |
852 | fid = NULL; |
853 | goto error; |
854 | } |
855 | |
856 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
857 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
858 | if (IS_ERR(req)) { |
859 | err = PTR_ERR(req); |
860 | goto error; |
861 | } |
862 | |
863 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
864 | if (err) { |
865 | p9pdu_dump(1, req->rc); |
866 | p9_free_req(clnt, req); |
867 | goto error; |
868 | } |
869 | |
870 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
871 | qid.type, |
872 | (unsigned long long)qid.path, |
873 | qid.version); |
874 | |
875 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); |
876 | |
877 | p9_free_req(clnt, req); |
878 | return fid; |
879 | |
880 | error: |
881 | if (fid) |
882 | p9_fid_destroy(fid); |
883 | return ERR_PTR(err); |
884 | } |
885 | EXPORT_SYMBOL(p9_client_attach); |
886 | |
887 | struct p9_fid * |
888 | p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) |
889 | { |
890 | int err; |
891 | struct p9_req_t *req; |
892 | struct p9_qid qid; |
893 | struct p9_fid *afid; |
894 | |
895 | P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); |
896 | err = 0; |
897 | |
898 | afid = p9_fid_create(clnt); |
899 | if (IS_ERR(afid)) { |
900 | err = PTR_ERR(afid); |
901 | afid = NULL; |
902 | goto error; |
903 | } |
904 | |
905 | req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", |
906 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
907 | if (IS_ERR(req)) { |
908 | err = PTR_ERR(req); |
909 | goto error; |
910 | } |
911 | |
912 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
913 | if (err) { |
914 | p9pdu_dump(1, req->rc); |
915 | p9_free_req(clnt, req); |
916 | goto error; |
917 | } |
918 | |
919 | P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", |
920 | qid.type, |
921 | (unsigned long long)qid.path, |
922 | qid.version); |
923 | |
924 | memmove(&afid->qid, &qid, sizeof(struct p9_qid)); |
925 | p9_free_req(clnt, req); |
926 | return afid; |
927 | |
928 | error: |
929 | if (afid) |
930 | p9_fid_destroy(afid); |
931 | return ERR_PTR(err); |
932 | } |
933 | EXPORT_SYMBOL(p9_client_auth); |
934 | |
935 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, |
936 | int clone) |
937 | { |
938 | int err; |
939 | struct p9_client *clnt; |
940 | struct p9_fid *fid; |
941 | struct p9_qid *wqids; |
942 | struct p9_req_t *req; |
943 | int16_t nwqids, count; |
944 | |
945 | err = 0; |
946 | clnt = oldfid->clnt; |
947 | if (clone) { |
948 | fid = p9_fid_create(clnt); |
949 | if (IS_ERR(fid)) { |
950 | err = PTR_ERR(fid); |
951 | fid = NULL; |
952 | goto error; |
953 | } |
954 | |
955 | fid->uid = oldfid->uid; |
956 | } else |
957 | fid = oldfid; |
958 | |
959 | |
960 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", |
961 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
962 | |
963 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, |
964 | nwname, wnames); |
965 | if (IS_ERR(req)) { |
966 | err = PTR_ERR(req); |
967 | goto error; |
968 | } |
969 | |
970 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
971 | if (err) { |
972 | p9pdu_dump(1, req->rc); |
973 | p9_free_req(clnt, req); |
974 | goto clunk_fid; |
975 | } |
976 | p9_free_req(clnt, req); |
977 | |
978 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
979 | |
980 | if (nwqids != nwname) { |
981 | err = -ENOENT; |
982 | goto clunk_fid; |
983 | } |
984 | |
985 | for (count = 0; count < nwqids; count++) |
986 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
987 | count, wqids[count].type, |
988 | (unsigned long long)wqids[count].path, |
989 | wqids[count].version); |
990 | |
991 | if (nwname) |
992 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
993 | else |
994 | fid->qid = oldfid->qid; |
995 | |
996 | return fid; |
997 | |
998 | clunk_fid: |
999 | p9_client_clunk(fid); |
1000 | fid = NULL; |
1001 | |
1002 | error: |
1003 | if (fid && (fid != oldfid)) |
1004 | p9_fid_destroy(fid); |
1005 | |
1006 | return ERR_PTR(err); |
1007 | } |
1008 | EXPORT_SYMBOL(p9_client_walk); |
1009 | |
1010 | int p9_client_open(struct p9_fid *fid, int mode) |
1011 | { |
1012 | int err; |
1013 | struct p9_client *clnt; |
1014 | struct p9_req_t *req; |
1015 | struct p9_qid qid; |
1016 | int iounit; |
1017 | |
1018 | P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); |
1019 | err = 0; |
1020 | clnt = fid->clnt; |
1021 | |
1022 | if (fid->mode != -1) |
1023 | return -EINVAL; |
1024 | |
1025 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
1026 | if (IS_ERR(req)) { |
1027 | err = PTR_ERR(req); |
1028 | goto error; |
1029 | } |
1030 | |
1031 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
1032 | if (err) { |
1033 | p9pdu_dump(1, req->rc); |
1034 | goto free_and_error; |
1035 | } |
1036 | |
1037 | P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", |
1038 | qid.type, |
1039 | (unsigned long long)qid.path, |
1040 | qid.version, iounit); |
1041 | |
1042 | fid->mode = mode; |
1043 | fid->iounit = iounit; |
1044 | |
1045 | free_and_error: |
1046 | p9_free_req(clnt, req); |
1047 | error: |
1048 | return err; |
1049 | } |
1050 | EXPORT_SYMBOL(p9_client_open); |
1051 | |
1052 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1053 | char *extension) |
1054 | { |
1055 | int err; |
1056 | struct p9_client *clnt; |
1057 | struct p9_req_t *req; |
1058 | struct p9_qid qid; |
1059 | int iounit; |
1060 | |
1061 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1062 | fid->fid, name, perm, mode); |
1063 | err = 0; |
1064 | clnt = fid->clnt; |
1065 | |
1066 | if (fid->mode != -1) |
1067 | return -EINVAL; |
1068 | |
1069 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1070 | mode, extension); |
1071 | if (IS_ERR(req)) { |
1072 | err = PTR_ERR(req); |
1073 | goto error; |
1074 | } |
1075 | |
1076 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
1077 | if (err) { |
1078 | p9pdu_dump(1, req->rc); |
1079 | goto free_and_error; |
1080 | } |
1081 | |
1082 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
1083 | qid.type, |
1084 | (unsigned long long)qid.path, |
1085 | qid.version, iounit); |
1086 | |
1087 | fid->mode = mode; |
1088 | fid->iounit = iounit; |
1089 | |
1090 | free_and_error: |
1091 | p9_free_req(clnt, req); |
1092 | error: |
1093 | return err; |
1094 | } |
1095 | EXPORT_SYMBOL(p9_client_fcreate); |
1096 | |
1097 | int p9_client_clunk(struct p9_fid *fid) |
1098 | { |
1099 | int err; |
1100 | struct p9_client *clnt; |
1101 | struct p9_req_t *req; |
1102 | |
1103 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
1104 | err = 0; |
1105 | clnt = fid->clnt; |
1106 | |
1107 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1108 | if (IS_ERR(req)) { |
1109 | err = PTR_ERR(req); |
1110 | goto error; |
1111 | } |
1112 | |
1113 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
1114 | |
1115 | p9_free_req(clnt, req); |
1116 | p9_fid_destroy(fid); |
1117 | |
1118 | error: |
1119 | return err; |
1120 | } |
1121 | EXPORT_SYMBOL(p9_client_clunk); |
1122 | |
1123 | int p9_client_remove(struct p9_fid *fid) |
1124 | { |
1125 | int err; |
1126 | struct p9_client *clnt; |
1127 | struct p9_req_t *req; |
1128 | |
1129 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
1130 | err = 0; |
1131 | clnt = fid->clnt; |
1132 | |
1133 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1134 | if (IS_ERR(req)) { |
1135 | err = PTR_ERR(req); |
1136 | goto error; |
1137 | } |
1138 | |
1139 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
1140 | |
1141 | p9_free_req(clnt, req); |
1142 | p9_fid_destroy(fid); |
1143 | |
1144 | error: |
1145 | return err; |
1146 | } |
1147 | EXPORT_SYMBOL(p9_client_remove); |
1148 | |
1149 | int |
1150 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, |
1151 | u32 count) |
1152 | { |
1153 | int err, rsize, total; |
1154 | struct p9_client *clnt; |
1155 | struct p9_req_t *req; |
1156 | char *dataptr; |
1157 | |
1158 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
1159 | (long long unsigned) offset, count); |
1160 | err = 0; |
1161 | clnt = fid->clnt; |
1162 | total = 0; |
1163 | |
1164 | rsize = fid->iounit; |
1165 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
1166 | rsize = clnt->msize - P9_IOHDRSZ; |
1167 | |
1168 | if (count < rsize) |
1169 | rsize = count; |
1170 | |
1171 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1172 | if (IS_ERR(req)) { |
1173 | err = PTR_ERR(req); |
1174 | goto error; |
1175 | } |
1176 | |
1177 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
1178 | if (err) { |
1179 | p9pdu_dump(1, req->rc); |
1180 | goto free_and_error; |
1181 | } |
1182 | |
1183 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
1184 | |
1185 | if (data) { |
1186 | memmove(data, dataptr, count); |
1187 | } |
1188 | |
1189 | if (udata) { |
1190 | err = copy_to_user(udata, dataptr, count); |
1191 | if (err) { |
1192 | err = -EFAULT; |
1193 | goto free_and_error; |
1194 | } |
1195 | } |
1196 | |
1197 | p9_free_req(clnt, req); |
1198 | return count; |
1199 | |
1200 | free_and_error: |
1201 | p9_free_req(clnt, req); |
1202 | error: |
1203 | return err; |
1204 | } |
1205 | EXPORT_SYMBOL(p9_client_read); |
1206 | |
1207 | int |
1208 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1209 | u64 offset, u32 count) |
1210 | { |
1211 | int err, rsize, total; |
1212 | struct p9_client *clnt; |
1213 | struct p9_req_t *req; |
1214 | |
1215 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1216 | fid->fid, (long long unsigned) offset, count); |
1217 | err = 0; |
1218 | clnt = fid->clnt; |
1219 | total = 0; |
1220 | |
1221 | rsize = fid->iounit; |
1222 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
1223 | rsize = clnt->msize - P9_IOHDRSZ; |
1224 | |
1225 | if (count < rsize) |
1226 | rsize = count; |
1227 | if (data) |
1228 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, |
1229 | rsize, data); |
1230 | else |
1231 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, |
1232 | rsize, udata); |
1233 | if (IS_ERR(req)) { |
1234 | err = PTR_ERR(req); |
1235 | goto error; |
1236 | } |
1237 | |
1238 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
1239 | if (err) { |
1240 | p9pdu_dump(1, req->rc); |
1241 | goto free_and_error; |
1242 | } |
1243 | |
1244 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
1245 | |
1246 | p9_free_req(clnt, req); |
1247 | return count; |
1248 | |
1249 | free_and_error: |
1250 | p9_free_req(clnt, req); |
1251 | error: |
1252 | return err; |
1253 | } |
1254 | EXPORT_SYMBOL(p9_client_write); |
1255 | |
1256 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
1257 | { |
1258 | int err; |
1259 | struct p9_client *clnt; |
1260 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); |
1261 | struct p9_req_t *req; |
1262 | u16 ignored; |
1263 | |
1264 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
1265 | |
1266 | if (!ret) |
1267 | return ERR_PTR(-ENOMEM); |
1268 | |
1269 | err = 0; |
1270 | clnt = fid->clnt; |
1271 | |
1272 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1273 | if (IS_ERR(req)) { |
1274 | err = PTR_ERR(req); |
1275 | goto error; |
1276 | } |
1277 | |
1278 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
1279 | if (err) { |
1280 | p9pdu_dump(1, req->rc); |
1281 | p9_free_req(clnt, req); |
1282 | goto error; |
1283 | } |
1284 | |
1285 | P9_DPRINTK(P9_DEBUG_9P, |
1286 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1287 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
1288 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
1289 | "<<< uid=%d gid=%d n_muid=%d\n", |
1290 | ret->size, ret->type, ret->dev, ret->qid.type, |
1291 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1292 | ret->atime, ret->mtime, (unsigned long long)ret->length, |
1293 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, |
1294 | ret->n_uid, ret->n_gid, ret->n_muid); |
1295 | |
1296 | p9_free_req(clnt, req); |
1297 | return ret; |
1298 | |
1299 | error: |
1300 | kfree(ret); |
1301 | return ERR_PTR(err); |
1302 | } |
1303 | EXPORT_SYMBOL(p9_client_stat); |
1304 | |
1305 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
1306 | { |
1307 | int ret; |
1308 | |
1309 | /* NOTE: size shouldn't include its own length */ |
1310 | /* size[2] type[2] dev[4] qid[13] */ |
1311 | /* mode[4] atime[4] mtime[4] length[8]*/ |
1312 | /* name[s] uid[s] gid[s] muid[s] */ |
1313 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
1314 | |
1315 | if (wst->name) |
1316 | ret += strlen(wst->name); |
1317 | if (wst->uid) |
1318 | ret += strlen(wst->uid); |
1319 | if (wst->gid) |
1320 | ret += strlen(wst->gid); |
1321 | if (wst->muid) |
1322 | ret += strlen(wst->muid); |
1323 | |
1324 | if (proto_version == p9_proto_2000u) { |
1325 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1326 | if (wst->extension) |
1327 | ret += strlen(wst->extension); |
1328 | } |
1329 | |
1330 | return ret; |
1331 | } |
1332 | |
1333 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1334 | { |
1335 | int err; |
1336 | struct p9_req_t *req; |
1337 | struct p9_client *clnt; |
1338 | |
1339 | err = 0; |
1340 | clnt = fid->clnt; |
1341 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
1342 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
1343 | P9_DPRINTK(P9_DEBUG_9P, |
1344 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1345 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
1346 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
1347 | " uid=%d gid=%d n_muid=%d\n", |
1348 | wst->size, wst->type, wst->dev, wst->qid.type, |
1349 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1350 | wst->atime, wst->mtime, (unsigned long long)wst->length, |
1351 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, |
1352 | wst->n_uid, wst->n_gid, wst->n_muid); |
1353 | |
1354 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
1355 | if (IS_ERR(req)) { |
1356 | err = PTR_ERR(req); |
1357 | goto error; |
1358 | } |
1359 | |
1360 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
1361 | |
1362 | p9_free_req(clnt, req); |
1363 | error: |
1364 | return err; |
1365 | } |
1366 | EXPORT_SYMBOL(p9_client_wstat); |
1367 |
Branches:
ben-wpan
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9