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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / net / 9p / client.c
blob9eb72505308fc697d2857737f8dd3f4ec04d5bd3
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) {
454 int ecode;
455 char *ename;
456
457 err = p9pdu_readf(req->rc, c->proto_version, "s?d",
458 &ename, &ecode);
459 if (err) {
460 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
461 err);
462 return err;
463 }
464
465 if (p9_is_proto_dotu(c) ||
466 p9_is_proto_dotl(c))
467 err = -ecode;
468
469 if (!err || !IS_ERR_VALUE(err))
470 err = p9_errstr2errno(ename, strlen(ename));
471
472 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
473
474 kfree(ename);
475 } else
476 err = 0;
477
478 return err;
479 }
480
481 /**
482 * p9_client_flush - flush (cancel) a request
483 * @c: client state
484 * @oldreq: request to cancel
485 *
486 * This sents a flush for a particular requests and links
487 * the flush request to the original request. The current
488 * code only supports a single flush request although the protocol
489 * allows for multiple flush requests to be sent for a single request.
490 *
491 */
492
493 static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
494 {
495 struct p9_req_t *req;
496 int16_t oldtag;
497 int err;
498
499 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
500 if (err)
501 return err;
502
503 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
504
505 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
506 if (IS_ERR(req))
507 return PTR_ERR(req);
508
509
510 /* if we haven't received a response for oldreq,
511 remove it from the list. */
512 spin_lock(&c->lock);
513 if (oldreq->status == REQ_STATUS_FLSH)
514 list_del(&oldreq->req_list);
515 spin_unlock(&c->lock);
516
517 p9_free_req(c, req);
518 return 0;
519 }
520
521 /**
522 * p9_client_rpc - issue a request and wait for a response
523 * @c: client session
524 * @type: type of request
525 * @fmt: protocol format string (see protocol.c)
526 *
527 * Returns request structure (which client must free using p9_free_req)
528 */
529
530 static struct p9_req_t *
531 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
532 {
533 va_list ap;
534 int tag, err;
535 struct p9_req_t *req;
536 unsigned long flags;
537 int sigpending;
538
539 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
540
541 /* we allow for any status other than disconnected */
542 if (c->status == Disconnected)
543 return ERR_PTR(-EIO);
544
545 /* if status is begin_disconnected we allow only clunk request */
546 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK))
547 return ERR_PTR(-EIO);
548
549 if (signal_pending(current)) {
550 sigpending = 1;
551 clear_thread_flag(TIF_SIGPENDING);
552 } else
553 sigpending = 0;
554
555 tag = P9_NOTAG;
556 if (type != P9_TVERSION) {
557 tag = p9_idpool_get(c->tagpool);
558 if (tag < 0)
559 return ERR_PTR(-ENOMEM);
560 }
561
562 req = p9_tag_alloc(c, tag);
563 if (IS_ERR(req))
564 return req;
565
566 /* marshall the data */
567 p9pdu_prepare(req->tc, tag, type);
568 va_start(ap, fmt);
569 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
570 va_end(ap);
571 p9pdu_finalize(req->tc);
572
573 err = c->trans_mod->request(c, req);
574 if (err < 0) {
575 c->status = Disconnected;
576 goto reterr;
577 }
578
579 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag);
580 err = wait_event_interruptible(*req->wq,
581 req->status >= REQ_STATUS_RCVD);
582 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n",
583 req->wq, tag, err);
584
585 if (req->status == REQ_STATUS_ERROR) {
586 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
587 err = req->t_err;
588 }
589
590 if ((err == -ERESTARTSYS) && (c->status == Connected)) {
591 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
592 sigpending = 1;
593 clear_thread_flag(TIF_SIGPENDING);
594
595 if (c->trans_mod->cancel(c, req))
596 p9_client_flush(c, req);
597
598 /* if we received the response anyway, don't signal error */
599 if (req->status == REQ_STATUS_RCVD)
600 err = 0;
601 }
602
603 if (sigpending) {
604 spin_lock_irqsave(&current->sighand->siglock, flags);
605 recalc_sigpending();
606 spin_unlock_irqrestore(&current->sighand->siglock, flags);
607 }
608
609 if (err < 0)
610 goto reterr;
611
612 err = p9_check_errors(c, req);
613 if (!err) {
614 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
615 return req;
616 }
617
618 reterr:
619 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
620 err);
621 p9_free_req(c, req);
622 return ERR_PTR(err);
623 }
624
625 static struct p9_fid *p9_fid_create(struct p9_client *clnt)
626 {
627 int ret;
628 struct p9_fid *fid;
629 unsigned long flags;
630
631 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
632 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
633 if (!fid)
634 return ERR_PTR(-ENOMEM);
635
636 ret = p9_idpool_get(clnt->fidpool);
637 if (ret < 0) {
638 ret = -ENOSPC;
639 goto error;
640 }
641 fid->fid = ret;
642
643 memset(&fid->qid, 0, sizeof(struct p9_qid));
644 fid->mode = -1;
645 fid->uid = current_fsuid();
646 fid->clnt = clnt;
647 fid->rdir = NULL;
648 spin_lock_irqsave(&clnt->lock, flags);
649 list_add(&fid->flist, &clnt->fidlist);
650 spin_unlock_irqrestore(&clnt->lock, flags);
651
652 return fid;
653
654 error:
655 kfree(fid);
656 return ERR_PTR(ret);
657 }
658
659 static void p9_fid_destroy(struct p9_fid *fid)
660 {
661 struct p9_client *clnt;
662 unsigned long flags;
663
664 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
665 clnt = fid->clnt;
666 p9_idpool_put(fid->fid, clnt->fidpool);
667 spin_lock_irqsave(&clnt->lock, flags);
668 list_del(&fid->flist);
669 spin_unlock_irqrestore(&clnt->lock, flags);
670 kfree(fid->rdir);
671 kfree(fid);
672 }
673
674 int p9_client_version(struct p9_client *c)
675 {
676 int err = 0;
677 struct p9_req_t *req;
678 char *version;
679 int msize;
680
681 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",
682 c->msize, c->proto_version);
683
684 switch (c->proto_version) {
685 case p9_proto_2000L:
686 req = p9_client_rpc(c, P9_TVERSION, "ds",
687 c->msize, "9P2000.L");
688 break;
689 case p9_proto_2000u:
690 req = p9_client_rpc(c, P9_TVERSION, "ds",
691 c->msize, "9P2000.u");
692 break;
693 case p9_proto_legacy:
694 req = p9_client_rpc(c, P9_TVERSION, "ds",
695 c->msize, "9P2000");
696 break;
697 default:
698 return -EINVAL;
699 break;
700 }
701
702 if (IS_ERR(req))
703 return PTR_ERR(req);
704
705 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
706 if (err) {
707 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
708 p9pdu_dump(1, req->rc);
709 goto error;
710 }
711
712 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
713 if (!strncmp(version, "9P2000.L", 8))
714 c->proto_version = p9_proto_2000L;
715 else if (!strncmp(version, "9P2000.u", 8))
716 c->proto_version = p9_proto_2000u;
717 else if (!strncmp(version, "9P2000", 6))
718 c->proto_version = p9_proto_legacy;
719 else {
720 err = -EREMOTEIO;
721 goto error;
722 }
723
724 if (msize < c->msize)
725 c->msize = msize;
726
727 error:
728 kfree(version);
729 p9_free_req(c, req);
730
731 return err;
732 }
733 EXPORT_SYMBOL(p9_client_version);
734
735 struct p9_client *p9_client_create(const char *dev_name, char *options)
736 {
737 int err;
738 struct p9_client *clnt;
739
740 err = 0;
741 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
742 if (!clnt)
743 return ERR_PTR(-ENOMEM);
744
745 clnt->trans_mod = NULL;
746 clnt->trans = NULL;
747 spin_lock_init(&clnt->lock);
748 INIT_LIST_HEAD(&clnt->fidlist);
749
750 p9_tag_init(clnt);
751
752 err = parse_opts(options, clnt);
753 if (err < 0)
754 goto free_client;
755
756 if (!clnt->trans_mod)
757 clnt->trans_mod = v9fs_get_default_trans();
758
759 if (clnt->trans_mod == NULL) {
760 err = -EPROTONOSUPPORT;
761 P9_DPRINTK(P9_DEBUG_ERROR,
762 "No transport defined or default transport\n");
763 goto free_client;
764 }
765
766 clnt->fidpool = p9_idpool_create();
767 if (IS_ERR(clnt->fidpool)) {
768 err = PTR_ERR(clnt->fidpool);
769 clnt->fidpool = NULL;
770 goto put_trans;
771 }
772
773 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
774 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
775
776 err = clnt->trans_mod->create(clnt, dev_name, options);
777 if (err)
778 goto destroy_fidpool;
779
780 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
781 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
782
783 err = p9_client_version(clnt);
784 if (err)
785 goto close_trans;
786
787 return clnt;
788
789 close_trans:
790 clnt->trans_mod->close(clnt);
791 destroy_fidpool:
792 p9_idpool_destroy(clnt->fidpool);
793 put_trans:
794 v9fs_put_trans(clnt->trans_mod);
795 free_client:
796 kfree(clnt);
797 return ERR_PTR(err);
798 }
799 EXPORT_SYMBOL(p9_client_create);
800
801 void p9_client_destroy(struct p9_client *clnt)
802 {
803 struct p9_fid *fid, *fidptr;
804
805 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
806
807 if (clnt->trans_mod)
808 clnt->trans_mod->close(clnt);
809
810 v9fs_put_trans(clnt->trans_mod);
811
812 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) {
813 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid);
814 p9_fid_destroy(fid);
815 }
816
817 if (clnt->fidpool)
818 p9_idpool_destroy(clnt->fidpool);
819
820 p9_tag_cleanup(clnt);
821
822 kfree(clnt);
823 }
824 EXPORT_SYMBOL(p9_client_destroy);
825
826 void p9_client_disconnect(struct p9_client *clnt)
827 {
828 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
829 clnt->status = Disconnected;
830 }
831 EXPORT_SYMBOL(p9_client_disconnect);
832
833 void p9_client_begin_disconnect(struct p9_client *clnt)
834 {
835 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
836 clnt->status = BeginDisconnect;
837 }
838 EXPORT_SYMBOL(p9_client_begin_disconnect);
839
840 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
841 char *uname, u32 n_uname, char *aname)
842 {
843 int err;
844 struct p9_req_t *req;
845 struct p9_fid *fid;
846 struct p9_qid qid;
847
848 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
849 afid ? afid->fid : -1, uname, aname);
850 err = 0;
851
852 fid = p9_fid_create(clnt);
853 if (IS_ERR(fid)) {
854 err = PTR_ERR(fid);
855 fid = NULL;
856 goto error;
857 }
858
859 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
860 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
861 if (IS_ERR(req)) {
862 err = PTR_ERR(req);
863 goto error;
864 }
865
866 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
867 if (err) {
868 p9pdu_dump(1, req->rc);
869 p9_free_req(clnt, req);
870 goto error;
871 }
872
873 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
874 qid.type,
875 (unsigned long long)qid.path,
876 qid.version);
877
878 memmove(&fid->qid, &qid, sizeof(struct p9_qid));
879
880 p9_free_req(clnt, req);
881 return fid;
882
883 error:
884 if (fid)
885 p9_fid_destroy(fid);
886 return ERR_PTR(err);
887 }
888 EXPORT_SYMBOL(p9_client_attach);
889
890 struct p9_fid *
891 p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname)
892 {
893 int err;
894 struct p9_req_t *req;
895 struct p9_qid qid;
896 struct p9_fid *afid;
897
898 P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname);
899 err = 0;
900
901 afid = p9_fid_create(clnt);
902 if (IS_ERR(afid)) {
903 err = PTR_ERR(afid);
904 afid = NULL;
905 goto error;
906 }
907
908 req = p9_client_rpc(clnt, P9_TAUTH, "dss?d",
909 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
910 if (IS_ERR(req)) {
911 err = PTR_ERR(req);
912 goto error;
913 }
914
915 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
916 if (err) {
917 p9pdu_dump(1, req->rc);
918 p9_free_req(clnt, req);
919 goto error;
920 }
921
922 P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n",
923 qid.type,
924 (unsigned long long)qid.path,
925 qid.version);
926
927 memmove(&afid->qid, &qid, sizeof(struct p9_qid));
928 p9_free_req(clnt, req);
929 return afid;
930
931 error:
932 if (afid)
933 p9_fid_destroy(afid);
934 return ERR_PTR(err);
935 }
936 EXPORT_SYMBOL(p9_client_auth);
937
938 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
939 int clone)
940 {
941 int err;
942 struct p9_client *clnt;
943 struct p9_fid *fid;
944 struct p9_qid *wqids;
945 struct p9_req_t *req;
946 int16_t nwqids, count;
947
948 err = 0;
949 wqids = NULL;
950 clnt = oldfid->clnt;
951 if (clone) {
952 fid = p9_fid_create(clnt);
953 if (IS_ERR(fid)) {
954 err = PTR_ERR(fid);
955 fid = NULL;
956 goto error;
957 }
958
959 fid->uid = oldfid->uid;
960 } else
961 fid = oldfid;
962
963
964 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n",
965 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
966
967 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
968 nwname, wnames);
969 if (IS_ERR(req)) {
970 err = PTR_ERR(req);
971 goto error;
972 }
973
974 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
975 if (err) {
976 p9pdu_dump(1, req->rc);
977 p9_free_req(clnt, req);
978 goto clunk_fid;
979 }
980 p9_free_req(clnt, req);
981
982 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
983
984 if (nwqids != nwname) {
985 err = -ENOENT;
986 goto clunk_fid;
987 }
988
989 for (count = 0; count < nwqids; count++)
990 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
991 count, wqids[count].type,
992 (unsigned long long)wqids[count].path,
993 wqids[count].version);
994
995 if (nwname)
996 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
997 else
998 fid->qid = oldfid->qid;
999
1000 kfree(wqids);
1001 return fid;
1002
1003 clunk_fid:
1004 kfree(wqids);
1005 p9_client_clunk(fid);
1006 fid = NULL;
1007
1008 error:
1009 if (fid && (fid != oldfid))
1010 p9_fid_destroy(fid);
1011
1012 return ERR_PTR(err);
1013 }
1014 EXPORT_SYMBOL(p9_client_walk);
1015
1016 int p9_client_open(struct p9_fid *fid, int mode)
1017 {
1018 int err;
1019 struct p9_client *clnt;
1020 struct p9_req_t *req;
1021 struct p9_qid qid;
1022 int iounit;
1023
1024 clnt = fid->clnt;
1025 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
1026 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
1027 err = 0;
1028
1029 if (fid->mode != -1)
1030 return -EINVAL;
1031
1032 if (p9_is_proto_dotl(clnt))
1033 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
1034 else
1035 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
1036 if (IS_ERR(req)) {
1037 err = PTR_ERR(req);
1038 goto error;
1039 }
1040
1041 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1042 if (err) {
1043 p9pdu_dump(1, req->rc);
1044 goto free_and_error;
1045 }
1046
1047 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
1048 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type,
1049 (unsigned long long)qid.path, qid.version, iounit);
1050
1051 fid->mode = mode;
1052 fid->iounit = iounit;
1053
1054 free_and_error:
1055 p9_free_req(clnt, req);
1056 error:
1057 return err;
1058 }
1059 EXPORT_SYMBOL(p9_client_open);
1060
1061 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
1062 gid_t gid, struct p9_qid *qid)
1063 {
1064 int err = 0;
1065 struct p9_client *clnt;
1066 struct p9_req_t *req;
1067 int iounit;
1068
1069 P9_DPRINTK(P9_DEBUG_9P,
1070 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n",
1071 ofid->fid, name, flags, mode, gid);
1072 clnt = ofid->clnt;
1073
1074 if (ofid->mode != -1)
1075 return -EINVAL;
1076
1077 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags,
1078 mode, gid);
1079 if (IS_ERR(req)) {
1080 err = PTR_ERR(req);
1081 goto error;
1082 }
1083
1084 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
1085 if (err) {
1086 p9pdu_dump(1, req->rc);
1087 goto free_and_error;
1088 }
1089
1090 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n",
1091 qid->type,
1092 (unsigned long long)qid->path,
1093 qid->version, iounit);
1094
1095 ofid->mode = mode;
1096 ofid->iounit = iounit;
1097
1098 free_and_error:
1099 p9_free_req(clnt, req);
1100 error:
1101 return err;
1102 }
1103 EXPORT_SYMBOL(p9_client_create_dotl);
1104
1105 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
1106 char *extension)
1107 {
1108 int err;
1109 struct p9_client *clnt;
1110 struct p9_req_t *req;
1111 struct p9_qid qid;
1112 int iounit;
1113
1114 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1115 fid->fid, name, perm, mode);
1116 err = 0;
1117 clnt = fid->clnt;
1118
1119 if (fid->mode != -1)
1120 return -EINVAL;
1121
1122 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
1123 mode, extension);
1124 if (IS_ERR(req)) {
1125 err = PTR_ERR(req);
1126 goto error;
1127 }
1128
1129 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1130 if (err) {
1131 p9pdu_dump(1, req->rc);
1132 goto free_and_error;
1133 }
1134
1135 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1136 qid.type,
1137 (unsigned long long)qid.path,
1138 qid.version, iounit);
1139
1140 fid->mode = mode;
1141 fid->iounit = iounit;
1142
1143 free_and_error:
1144 p9_free_req(clnt, req);
1145 error:
1146 return err;
1147 }
1148 EXPORT_SYMBOL(p9_client_fcreate);
1149
1150 int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,
1151 struct p9_qid *qid)
1152 {
1153 int err = 0;
1154 struct p9_client *clnt;
1155 struct p9_req_t *req;
1156
1157 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n",
1158 dfid->fid, name, symtgt);
1159 clnt = dfid->clnt;
1160
1161 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt,
1162 gid);
1163 if (IS_ERR(req)) {
1164 err = PTR_ERR(req);
1165 goto error;
1166 }
1167
1168 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1169 if (err) {
1170 p9pdu_dump(1, req->rc);
1171 goto free_and_error;
1172 }
1173
1174 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n",
1175 qid->type, (unsigned long long)qid->path, qid->version);
1176
1177 free_and_error:
1178 p9_free_req(clnt, req);
1179 error:
1180 return err;
1181 }
1182 EXPORT_SYMBOL(p9_client_symlink);
1183
1184 int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
1185 {
1186 struct p9_client *clnt;
1187 struct p9_req_t *req;
1188
1189 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
1190 dfid->fid, oldfid->fid, newname);
1191 clnt = dfid->clnt;
1192 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
1193 newname);
1194 if (IS_ERR(req))
1195 return PTR_ERR(req);
1196
1197 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
1198 p9_free_req(clnt, req);
1199 return 0;
1200 }
1201 EXPORT_SYMBOL(p9_client_link);
1202
1203 int p9_client_clunk(struct p9_fid *fid)
1204 {
1205 int err;
1206 struct p9_client *clnt;
1207 struct p9_req_t *req;
1208
1209 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
1210 err = 0;
1211 clnt = fid->clnt;
1212
1213 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
1214 if (IS_ERR(req)) {
1215 err = PTR_ERR(req);
1216 goto error;
1217 }
1218
1219 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
1220
1221 p9_free_req(clnt, req);
1222 p9_fid_destroy(fid);
1223
1224 error:
1225 return err;
1226 }
1227 EXPORT_SYMBOL(p9_client_clunk);
1228
1229 int p9_client_remove(struct p9_fid *fid)
1230 {
1231 int err;
1232 struct p9_client *clnt;
1233 struct p9_req_t *req;
1234
1235 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
1236 err = 0;
1237 clnt = fid->clnt;
1238
1239 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
1240 if (IS_ERR(req)) {
1241 err = PTR_ERR(req);
1242 goto error;
1243 }
1244
1245 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
1246
1247 p9_free_req(clnt, req);
1248 error:
1249 p9_fid_destroy(fid);
1250 return err;
1251 }
1252 EXPORT_SYMBOL(p9_client_remove);
1253
1254 int
1255 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
1256 u32 count)
1257 {
1258 int err, rsize, total;
1259 struct p9_client *clnt;
1260 struct p9_req_t *req;
1261 char *dataptr;
1262
1263 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid,
1264 (long long unsigned) offset, count);
1265 err = 0;
1266 clnt = fid->clnt;
1267 total = 0;
1268
1269 rsize = fid->iounit;
1270 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1271 rsize = clnt->msize - P9_IOHDRSZ;
1272
1273 if (count < rsize)
1274 rsize = count;
1275
1276 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize);
1277 if (IS_ERR(req)) {
1278 err = PTR_ERR(req);
1279 goto error;
1280 }
1281
1282 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1283 if (err) {
1284 p9pdu_dump(1, req->rc);
1285 goto free_and_error;
1286 }
1287
1288 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
1289
1290 if (data) {
1291 memmove(data, dataptr, count);
1292 }
1293
1294 if (udata) {
1295 err = copy_to_user(udata, dataptr, count);
1296 if (err) {
1297 err = -EFAULT;
1298 goto free_and_error;
1299 }
1300 }
1301
1302 p9_free_req(clnt, req);
1303 return count;
1304
1305 free_and_error:
1306 p9_free_req(clnt, req);
1307 error:
1308 return err;
1309 }
1310 EXPORT_SYMBOL(p9_client_read);
1311
1312 int
1313 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
1314 u64 offset, u32 count)
1315 {
1316 int err, rsize, total;
1317 struct p9_client *clnt;
1318 struct p9_req_t *req;
1319
1320 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
1321 fid->fid, (long long unsigned) offset, count);
1322 err = 0;
1323 clnt = fid->clnt;
1324 total = 0;
1325
1326 rsize = fid->iounit;
1327 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1328 rsize = clnt->msize - P9_IOHDRSZ;
1329
1330 if (count < rsize)
1331 rsize = count;
1332 if (data)
1333 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset,
1334 rsize, data);
1335 else
1336 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset,
1337 rsize, udata);
1338 if (IS_ERR(req)) {
1339 err = PTR_ERR(req);
1340 goto error;
1341 }
1342
1343 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
1344 if (err) {
1345 p9pdu_dump(1, req->rc);
1346 goto free_and_error;
1347 }
1348
1349 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
1350
1351 p9_free_req(clnt, req);
1352 return count;
1353
1354 free_and_error:
1355 p9_free_req(clnt, req);
1356 error:
1357 return err;
1358 }
1359 EXPORT_SYMBOL(p9_client_write);
1360
1361 struct p9_wstat *p9_client_stat(struct p9_fid *fid)
1362 {
1363 int err;
1364 struct p9_client *clnt;
1365 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
1366 struct p9_req_t *req;
1367 u16 ignored;
1368
1369 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
1370
1371 if (!ret)
1372 return ERR_PTR(-ENOMEM);
1373
1374 err = 0;
1375 clnt = fid->clnt;
1376
1377 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
1378 if (IS_ERR(req)) {
1379 err = PTR_ERR(req);
1380 goto error;
1381 }
1382
1383 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
1384 if (err) {
1385 p9pdu_dump(1, req->rc);
1386 p9_free_req(clnt, req);
1387 goto error;
1388 }
1389
1390 P9_DPRINTK(P9_DEBUG_9P,
1391 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1392 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1393 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1394 "<<< uid=%d gid=%d n_muid=%d\n",
1395 ret->size, ret->type, ret->dev, ret->qid.type,
1396 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode,
1397 ret->atime, ret->mtime, (unsigned long long)ret->length,
1398 ret->name, ret->uid, ret->gid, ret->muid, ret->extension,
1399 ret->n_uid, ret->n_gid, ret->n_muid);
1400
1401 p9_free_req(clnt, req);
1402 return ret;
1403
1404 error:
1405 kfree(ret);
1406 return ERR_PTR(err);
1407 }
1408 EXPORT_SYMBOL(p9_client_stat);
1409
1410 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
1411 u64 request_mask)
1412 {
1413 int err;
1414 struct p9_client *clnt;
1415 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl),
1416 GFP_KERNEL);
1417 struct p9_req_t *req;
1418
1419 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n",
1420 fid->fid, request_mask);
1421
1422 if (!ret)
1423 return ERR_PTR(-ENOMEM);
1424
1425 err = 0;
1426 clnt = fid->clnt;
1427
1428 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask);
1429 if (IS_ERR(req)) {
1430 err = PTR_ERR(req);
1431 goto error;
1432 }
1433
1434 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
1435 if (err) {
1436 p9pdu_dump(1, req->rc);
1437 p9_free_req(clnt, req);
1438 goto error;
1439 }
1440
1441 P9_DPRINTK(P9_DEBUG_9P,
1442 "<<< RGETATTR st_result_mask=%lld\n"
1443 "<<< qid=%x.%llx.%x\n"
1444 "<<< st_mode=%8.8x st_nlink=%llu\n"
1445 "<<< st_uid=%d st_gid=%d\n"
1446 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n"
1447 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n"
1448 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n"
1449 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n"
1450 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n"
1451 "<<< st_gen=%lld st_data_version=%lld",
1452 ret->st_result_mask, ret->qid.type, ret->qid.path,
1453 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid,
1454 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize,
1455 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec,
1456 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec,
1457 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec,
1458 ret->st_gen, ret->st_data_version);
1459
1460 p9_free_req(clnt, req);
1461 return ret;
1462
1463 error:
1464 kfree(ret);
1465 return ERR_PTR(err);
1466 }
1467 EXPORT_SYMBOL(p9_client_getattr_dotl);
1468
1469 static int p9_client_statsize(struct p9_wstat *wst, int proto_version)
1470 {
1471 int ret;
1472
1473 /* NOTE: size shouldn't include its own length */
1474 /* size[2] type[2] dev[4] qid[13] */
1475 /* mode[4] atime[4] mtime[4] length[8]*/
1476 /* name[s] uid[s] gid[s] muid[s] */
1477 ret = 2+4+13+4+4+4+8+2+2+2+2;
1478
1479 if (wst->name)
1480 ret += strlen(wst->name);
1481 if (wst->uid)
1482 ret += strlen(wst->uid);
1483 if (wst->gid)
1484 ret += strlen(wst->gid);
1485 if (wst->muid)
1486 ret += strlen(wst->muid);
1487
1488 if ((proto_version == p9_proto_2000u) ||
1489 (proto_version == p9_proto_2000L)) {
1490 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
1491 if (wst->extension)
1492 ret += strlen(wst->extension);
1493 }
1494
1495 return ret;
1496 }
1497
1498 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
1499 {
1500 int err;
1501 struct p9_req_t *req;
1502 struct p9_client *clnt;
1503
1504 err = 0;
1505 clnt = fid->clnt;
1506 wst->size = p9_client_statsize(wst, clnt->proto_version);
1507 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
1508 P9_DPRINTK(P9_DEBUG_9P,
1509 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1510 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1511 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1512 " uid=%d gid=%d n_muid=%d\n",
1513 wst->size, wst->type, wst->dev, wst->qid.type,
1514 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode,
1515 wst->atime, wst->mtime, (unsigned long long)wst->length,
1516 wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
1517 wst->n_uid, wst->n_gid, wst->n_muid);
1518
1519 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst);
1520 if (IS_ERR(req)) {
1521 err = PTR_ERR(req);
1522 goto error;
1523 }
1524
1525 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
1526
1527 p9_free_req(clnt, req);
1528 error:
1529 return err;
1530 }
1531 EXPORT_SYMBOL(p9_client_wstat);
1532
1533 int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr)
1534 {
1535 int err;
1536 struct p9_req_t *req;
1537 struct p9_client *clnt;
1538
1539 err = 0;
1540 clnt = fid->clnt;
1541 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid);
1542 P9_DPRINTK(P9_DEBUG_9P,
1543 " valid=%x mode=%x uid=%d gid=%d size=%lld\n"
1544 " atime_sec=%lld atime_nsec=%lld\n"
1545 " mtime_sec=%lld mtime_nsec=%lld\n",
1546 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid,
1547 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec,
1548 p9attr->mtime_sec, p9attr->mtime_nsec);
1549
1550 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr);
1551
1552 if (IS_ERR(req)) {
1553 err = PTR_ERR(req);
1554 goto error;
1555 }
1556 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid);
1557 p9_free_req(clnt, req);
1558 error:
1559 return err;
1560 }
1561 EXPORT_SYMBOL(p9_client_setattr);
1562
1563 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
1564 {
1565 int err;
1566 struct p9_req_t *req;
1567 struct p9_client *clnt;
1568
1569 err = 0;
1570 clnt = fid->clnt;
1571
1572 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid);
1573
1574 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid);
1575 if (IS_ERR(req)) {
1576 err = PTR_ERR(req);
1577 goto error;
1578 }
1579
1580 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,
1581 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
1582 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
1583 if (err) {
1584 p9pdu_dump(1, req->rc);
1585 p9_free_req(clnt, req);
1586 goto error;
1587 }
1588
1589 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
1590 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
1591 "fsid %llu namelen %ld\n",
1592 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize,
1593 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree,
1594 sb->fsid, (long int)sb->namelen);
1595
1596 p9_free_req(clnt, req);
1597 error:
1598 return err;
1599 }
1600 EXPORT_SYMBOL(p9_client_statfs);
1601
1602 int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)
1603 {
1604 int err;
1605 struct p9_req_t *req;
1606 struct p9_client *clnt;
1607
1608 err = 0;
1609 clnt = fid->clnt;
1610
1611 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n",
1612 fid->fid, newdirfid->fid, name);
1613
1614 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid,
1615 newdirfid->fid, name);
1616 if (IS_ERR(req)) {
1617 err = PTR_ERR(req);
1618 goto error;
1619 }
1620
1621 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid);
1622
1623 p9_free_req(clnt, req);
1624 error:
1625 return err;
1626 }
1627 EXPORT_SYMBOL(p9_client_rename);
1628
1629 /*
1630 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
1631 */
1632 struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
1633 const char *attr_name, u64 *attr_size)
1634 {
1635 int err;
1636 struct p9_req_t *req;
1637 struct p9_client *clnt;
1638 struct p9_fid *attr_fid;
1639
1640 err = 0;
1641 clnt = file_fid->clnt;
1642 attr_fid = p9_fid_create(clnt);
1643 if (IS_ERR(attr_fid)) {
1644 err = PTR_ERR(attr_fid);
1645 attr_fid = NULL;
1646 goto error;
1647 }
1648 P9_DPRINTK(P9_DEBUG_9P,
1649 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
1650 file_fid->fid, attr_fid->fid, attr_name);
1651
1652 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",
1653 file_fid->fid, attr_fid->fid, attr_name);
1654 if (IS_ERR(req)) {
1655 err = PTR_ERR(req);
1656 goto error;
1657 }
1658 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
1659 if (err) {
1660 p9pdu_dump(1, req->rc);
1661 p9_free_req(clnt, req);
1662 goto clunk_fid;
1663 }
1664 p9_free_req(clnt, req);
1665 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n",
1666 attr_fid->fid, *attr_size);
1667 return attr_fid;
1668 clunk_fid:
1669 p9_client_clunk(attr_fid);
1670 attr_fid = NULL;
1671 error:
1672 if (attr_fid && (attr_fid != file_fid))
1673 p9_fid_destroy(attr_fid);
1674
1675 return ERR_PTR(err);
1676 }
1677 EXPORT_SYMBOL_GPL(p9_client_xattrwalk);
1678
1679 int p9_client_xattrcreate(struct p9_fid *fid, const char *name,
1680 u64 attr_size, int flags)
1681 {
1682 int err;
1683 struct p9_req_t *req;
1684 struct p9_client *clnt;
1685
1686 P9_DPRINTK(P9_DEBUG_9P,
1687 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n",
1688 fid->fid, name, (long long)attr_size, flags);
1689 err = 0;
1690 clnt = fid->clnt;
1691 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd",
1692 fid->fid, name, attr_size, flags);
1693 if (IS_ERR(req)) {
1694 err = PTR_ERR(req);
1695 goto error;
1696 }
1697 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid);
1698 p9_free_req(clnt, req);
1699 error:
1700 return err;
1701 }
1702 EXPORT_SYMBOL_GPL(p9_client_xattrcreate);
1703
1704 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
1705 {
1706 int err, rsize, total;
1707 struct p9_client *clnt;
1708 struct p9_req_t *req;
1709 char *dataptr;
1710
1711 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n",
1712 fid->fid, (long long unsigned) offset, count);
1713
1714 err = 0;
1715 clnt = fid->clnt;
1716 total = 0;
1717
1718 rsize = fid->iounit;
1719 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ)
1720 rsize = clnt->msize - P9_READDIRHDRSZ;
1721
1722 if (count < rsize)
1723 rsize = count;
1724
1725 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize);
1726 if (IS_ERR(req)) {
1727 err = PTR_ERR(req);
1728 goto error;
1729 }
1730
1731 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1732 if (err) {
1733 p9pdu_dump(1, req->rc);
1734 goto free_and_error;
1735 }
1736
1737 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count);
1738
1739 if (data)
1740 memmove(data, dataptr, count);
1741
1742 p9_free_req(clnt, req);
1743 return count;
1744
1745 free_and_error:
1746 p9_free_req(clnt, req);
1747 error:
1748 return err;
1749 }
1750 EXPORT_SYMBOL(p9_client_readdir);
1751
1752 int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,
1753 dev_t rdev, gid_t gid, struct p9_qid *qid)
1754 {
1755 int err;
1756 struct p9_client *clnt;
1757 struct p9_req_t *req;
1758
1759 err = 0;
1760 clnt = fid->clnt;
1761 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d "
1762 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev));
1763 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode,
1764 MAJOR(rdev), MINOR(rdev), gid);
1765 if (IS_ERR(req))
1766 return PTR_ERR(req);
1767
1768 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1769 if (err) {
1770 p9pdu_dump(1, req->rc);
1771 goto error;
1772 }
1773 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
1774 (unsigned long long)qid->path, qid->version);
1775
1776 error:
1777 p9_free_req(clnt, req);
1778 return err;
1779
1780 }
1781 EXPORT_SYMBOL(p9_client_mknod_dotl);
1782
1783 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
1784 gid_t gid, struct p9_qid *qid)
1785 {
1786 int err;
1787 struct p9_client *clnt;
1788 struct p9_req_t *req;
1789
1790 err = 0;
1791 clnt = fid->clnt;
1792 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n",
1793 fid->fid, name, mode, gid);
1794 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode,
1795 gid);
1796 if (IS_ERR(req))
1797 return PTR_ERR(req);
1798
1799 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1800 if (err) {
1801 p9pdu_dump(1, req->rc);
1802 goto error;
1803 }
1804 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
1805 (unsigned long long)qid->path, qid->version);
1806
1807 error:
1808 p9_free_req(clnt, req);
1809 return err;
1810
1811 }
1812 EXPORT_SYMBOL(p9_client_mkdir_dotl);
Tomato firmware and modifications.