Commit | Line | Data |
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bd238fb4 LI |
1 | /* |
2 | * net/9p/clnt.c | |
3 | * | |
4 | * 9P Client | |
5 | * | |
8a0dc95f | 6 | * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
bd238fb4 LI |
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> | |
8a0dc95f | 29 | #include <linux/poll.h> |
bd238fb4 LI |
30 | #include <linux/idr.h> |
31 | #include <linux/mutex.h> | |
32 | #include <linux/sched.h> | |
33 | #include <linux/uaccess.h> | |
34 | #include <net/9p/9p.h> | |
fb0466c3 | 35 | #include <linux/parser.h> |
bd238fb4 | 36 | #include <net/9p/client.h> |
8b81ef58 | 37 | #include <net/9p/transport.h> |
51a87c55 | 38 | #include "protocol.h" |
bd238fb4 | 39 | |
8a0dc95f EVH |
40 | /* |
41 | * Client Option Parsing (code inspired by NFS code) | |
42 | * - a little lazy - parse all client options | |
43 | */ | |
44 | ||
45 | enum { | |
46 | Opt_msize, | |
47 | Opt_trans, | |
48 | Opt_legacy, | |
49 | Opt_err, | |
50 | }; | |
51 | ||
a447c093 | 52 | static const match_table_t tokens = { |
8a0dc95f EVH |
53 | {Opt_msize, "msize=%u"}, |
54 | {Opt_legacy, "noextend"}, | |
55 | {Opt_trans, "trans=%s"}, | |
56 | {Opt_err, NULL}, | |
57 | }; | |
58 | ||
51a87c55 EVH |
59 | static struct p9_req_t * |
60 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
91b8534f | 61 | |
8a0dc95f EVH |
62 | /** |
63 | * v9fs_parse_options - parse mount options into session structure | |
64 | * @options: options string passed from mount | |
65 | * @v9ses: existing v9fs session information | |
66 | * | |
bb8ffdfc | 67 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
68 | */ |
69 | ||
bb8ffdfc | 70 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 71 | { |
bb8ffdfc | 72 | char *options; |
8a0dc95f EVH |
73 | char *p; |
74 | substring_t args[MAX_OPT_ARGS]; | |
75 | int option; | |
bb8ffdfc | 76 | int ret = 0; |
8a0dc95f | 77 | |
8a0dc95f EVH |
78 | clnt->dotu = 1; |
79 | clnt->msize = 8192; | |
80 | ||
bb8ffdfc EVH |
81 | if (!opts) |
82 | return 0; | |
83 | ||
84 | options = kstrdup(opts, GFP_KERNEL); | |
85 | if (!options) { | |
86 | P9_DPRINTK(P9_DEBUG_ERROR, | |
87 | "failed to allocate copy of option string\n"); | |
88 | return -ENOMEM; | |
89 | } | |
8a0dc95f EVH |
90 | |
91 | while ((p = strsep(&options, ",")) != NULL) { | |
92 | int token; | |
93 | if (!*p) | |
94 | continue; | |
95 | token = match_token(p, tokens, args); | |
96 | if (token < Opt_trans) { | |
bb8ffdfc EVH |
97 | int r = match_int(&args[0], &option); |
98 | if (r < 0) { | |
8a0dc95f EVH |
99 | P9_DPRINTK(P9_DEBUG_ERROR, |
100 | "integer field, but no integer?\n"); | |
bb8ffdfc | 101 | ret = r; |
8a0dc95f EVH |
102 | continue; |
103 | } | |
104 | } | |
105 | switch (token) { | |
106 | case Opt_msize: | |
107 | clnt->msize = option; | |
108 | break; | |
109 | case Opt_trans: | |
72029fe8 | 110 | clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); |
8a0dc95f EVH |
111 | break; |
112 | case Opt_legacy: | |
113 | clnt->dotu = 0; | |
114 | break; | |
115 | default: | |
116 | continue; | |
117 | } | |
118 | } | |
72029fe8 TH |
119 | |
120 | if (!clnt->trans_mod) | |
121 | clnt->trans_mod = v9fs_get_default_trans(); | |
122 | ||
bb8ffdfc EVH |
123 | kfree(options); |
124 | return ret; | |
8a0dc95f EVH |
125 | } |
126 | ||
fea511a6 EVH |
127 | /** |
128 | * p9_tag_alloc - lookup/allocate a request by tag | |
129 | * @c: client session to lookup tag within | |
130 | * @tag: numeric id for transaction | |
131 | * | |
132 | * this is a simple array lookup, but will grow the | |
133 | * request_slots as necessary to accomodate transaction | |
134 | * ids which did not previously have a slot. | |
135 | * | |
136 | * this code relies on the client spinlock to manage locks, its | |
137 | * possible we should switch to something else, but I'd rather | |
138 | * stick with something low-overhead for the common case. | |
139 | * | |
140 | */ | |
141 | ||
51a87c55 | 142 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) |
fea511a6 EVH |
143 | { |
144 | unsigned long flags; | |
145 | int row, col; | |
51a87c55 | 146 | struct p9_req_t *req; |
fea511a6 EVH |
147 | |
148 | /* This looks up the original request by tag so we know which | |
149 | * buffer to read the data into */ | |
150 | tag++; | |
151 | ||
152 | if (tag >= c->max_tag) { | |
153 | spin_lock_irqsave(&c->lock, flags); | |
154 | /* check again since original check was outside of lock */ | |
155 | while (tag >= c->max_tag) { | |
156 | row = (tag / P9_ROW_MAXTAG); | |
157 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
158 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
159 | ||
160 | if (!c->reqs[row]) { | |
161 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
e45c5405 | 162 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 163 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
164 | } |
165 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
166 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 167 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
168 | } |
169 | c->max_tag += P9_ROW_MAXTAG; | |
170 | } | |
171 | spin_unlock_irqrestore(&c->lock, flags); | |
172 | } | |
173 | row = tag / P9_ROW_MAXTAG; | |
174 | col = tag % P9_ROW_MAXTAG; | |
175 | ||
51a87c55 EVH |
176 | req = &c->reqs[row][col]; |
177 | if (!req->tc) { | |
178 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); | |
179 | if (!req->wq) { | |
180 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
181 | return ERR_PTR(-ENOMEM); | |
182 | } | |
183 | init_waitqueue_head(req->wq); | |
184 | req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
185 | GFP_KERNEL); | |
186 | req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
187 | GFP_KERNEL); | |
188 | if ((!req->tc) || (!req->rc)) { | |
189 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
190 | kfree(req->tc); | |
191 | kfree(req->rc); | |
45abdf1c TT |
192 | kfree(req->wq); |
193 | req->tc = req->rc = NULL; | |
194 | req->wq = NULL; | |
51a87c55 EVH |
195 | return ERR_PTR(-ENOMEM); |
196 | } | |
197 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); | |
198 | req->tc->capacity = c->msize; | |
199 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); | |
200 | req->rc->capacity = c->msize; | |
201 | } | |
202 | ||
203 | p9pdu_reset(req->tc); | |
204 | p9pdu_reset(req->rc); | |
205 | ||
206 | req->flush_tag = 0; | |
207 | req->tc->tag = tag-1; | |
208 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
209 | |
210 | return &c->reqs[row][col]; | |
211 | } | |
fea511a6 EVH |
212 | |
213 | /** | |
214 | * p9_tag_lookup - lookup a request by tag | |
215 | * @c: client session to lookup tag within | |
216 | * @tag: numeric id for transaction | |
217 | * | |
218 | */ | |
219 | ||
220 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
221 | { | |
222 | int row, col; | |
223 | ||
224 | /* This looks up the original request by tag so we know which | |
225 | * buffer to read the data into */ | |
226 | tag++; | |
227 | ||
228 | BUG_ON(tag >= c->max_tag); | |
229 | ||
230 | row = tag / P9_ROW_MAXTAG; | |
231 | col = tag % P9_ROW_MAXTAG; | |
232 | ||
233 | return &c->reqs[row][col]; | |
234 | } | |
235 | EXPORT_SYMBOL(p9_tag_lookup); | |
236 | ||
237 | /** | |
238 | * p9_tag_init - setup tags structure and contents | |
239 | * @tags: tags structure from the client struct | |
240 | * | |
241 | * This initializes the tags structure for each client instance. | |
242 | * | |
243 | */ | |
244 | ||
245 | static int p9_tag_init(struct p9_client *c) | |
246 | { | |
247 | int err = 0; | |
248 | ||
249 | c->tagpool = p9_idpool_create(); | |
250 | if (IS_ERR(c->tagpool)) { | |
251 | err = PTR_ERR(c->tagpool); | |
252 | c->tagpool = NULL; | |
253 | goto error; | |
254 | } | |
255 | ||
256 | p9_idpool_get(c->tagpool); /* reserve tag 0 */ | |
257 | ||
258 | c->max_tag = 0; | |
259 | error: | |
260 | return err; | |
261 | } | |
262 | ||
263 | /** | |
264 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
265 | * @tags: tags structure from the client struct | |
266 | * | |
267 | * This frees resources associated with the tags structure | |
268 | * | |
269 | */ | |
270 | static void p9_tag_cleanup(struct p9_client *c) | |
271 | { | |
272 | int row, col; | |
273 | ||
274 | /* check to insure all requests are idle */ | |
275 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
276 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
277 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
278 | P9_DPRINTK(P9_DEBUG_MUX, | |
279 | "Attempting to cleanup non-free tag %d,%d\n", | |
280 | row, col); | |
281 | /* TODO: delay execution of cleanup */ | |
282 | return; | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
287 | if (c->tagpool) | |
288 | p9_idpool_destroy(c->tagpool); | |
289 | ||
290 | /* free requests associated with tags */ | |
291 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 292 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 293 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
294 | kfree(c->reqs[row][col].tc); |
295 | kfree(c->reqs[row][col].rc); | |
296 | } | |
fea511a6 EVH |
297 | kfree(c->reqs[row]); |
298 | } | |
299 | c->max_tag = 0; | |
300 | } | |
301 | ||
673d62cd EVH |
302 | /** |
303 | * p9_free_req - free a request and clean-up as necessary | |
304 | * c: client state | |
305 | * r: request to release | |
306 | * | |
307 | */ | |
308 | ||
51a87c55 | 309 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 310 | { |
51a87c55 EVH |
311 | int tag = r->tc->tag; |
312 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
313 | ||
673d62cd | 314 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
315 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
316 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
317 | } |
318 | ||
91b8534f EVH |
319 | /** |
320 | * p9_client_cb - call back from transport to client | |
321 | * c: client state | |
322 | * req: request received | |
323 | * | |
324 | */ | |
325 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
326 | { | |
327 | struct p9_req_t *other_req; | |
328 | unsigned long flags; | |
329 | ||
51a87c55 | 330 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
91b8534f EVH |
331 | |
332 | if (req->status == REQ_STATUS_ERROR) | |
333 | wake_up(req->wq); | |
334 | ||
51a87c55 EVH |
335 | if (req->flush_tag) { /* flush receive path */ |
336 | P9_DPRINTK(P9_DEBUG_9P, "<<< RFLUSH %d\n", req->tc->tag); | |
91b8534f | 337 | spin_lock_irqsave(&c->lock, flags); |
51a87c55 EVH |
338 | other_req = p9_tag_lookup(c, req->flush_tag); |
339 | if (other_req->status != REQ_STATUS_FLSH) /* stale flush */ | |
91b8534f EVH |
340 | spin_unlock_irqrestore(&c->lock, flags); |
341 | else { | |
91b8534f EVH |
342 | other_req->status = REQ_STATUS_FLSHD; |
343 | spin_unlock_irqrestore(&c->lock, flags); | |
344 | wake_up(other_req->wq); | |
345 | } | |
346 | p9_free_req(c, req); | |
347 | } else { /* normal receive path */ | |
51a87c55 | 348 | P9_DPRINTK(P9_DEBUG_MUX, "normal: tag %d\n", req->tc->tag); |
91b8534f EVH |
349 | spin_lock_irqsave(&c->lock, flags); |
350 | if (req->status != REQ_STATUS_FLSHD) | |
351 | req->status = REQ_STATUS_RCVD; | |
91b8534f EVH |
352 | spin_unlock_irqrestore(&c->lock, flags); |
353 | wake_up(req->wq); | |
354 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
355 | } | |
356 | } | |
357 | EXPORT_SYMBOL(p9_client_cb); | |
358 | ||
51a87c55 EVH |
359 | /** |
360 | * p9_parse_header - parse header arguments out of a packet | |
361 | * @pdu: packet to parse | |
362 | * @size: size of packet | |
363 | * @type: type of request | |
364 | * @tag: tag of packet | |
365 | * @rewind: set if we need to rewind offset afterwards | |
366 | */ | |
367 | ||
368 | int | |
369 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
370 | int rewind) | |
371 | { | |
372 | int8_t r_type; | |
373 | int16_t r_tag; | |
374 | int32_t r_size; | |
375 | int offset = pdu->offset; | |
376 | int err; | |
377 | ||
378 | pdu->offset = 0; | |
379 | if (pdu->size == 0) | |
380 | pdu->size = 7; | |
381 | ||
382 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
383 | if (err) | |
384 | goto rewind_and_exit; | |
385 | ||
386 | pdu->size = r_size; | |
387 | pdu->id = r_type; | |
388 | pdu->tag = r_tag; | |
389 | ||
e7f4b8f1 EVH |
390 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
391 | pdu->id, pdu->tag); | |
51a87c55 EVH |
392 | |
393 | if (type) | |
394 | *type = r_type; | |
395 | if (tag) | |
396 | *tag = r_tag; | |
397 | if (size) | |
398 | *size = r_size; | |
399 | ||
400 | ||
401 | rewind_and_exit: | |
402 | if (rewind) | |
403 | pdu->offset = offset; | |
404 | return err; | |
405 | } | |
406 | EXPORT_SYMBOL(p9_parse_header); | |
407 | ||
408 | /** | |
409 | * p9_check_errors - check 9p packet for error return and process it | |
410 | * @c: current client instance | |
411 | * @req: request to parse and check for error conditions | |
412 | * | |
413 | * returns error code if one is discovered, otherwise returns 0 | |
414 | * | |
415 | * this will have to be more complicated if we have multiple | |
416 | * error packet types | |
417 | */ | |
418 | ||
419 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
420 | { | |
421 | int8_t type; | |
422 | int err; | |
423 | ||
424 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
425 | if (err) { | |
426 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
427 | return err; | |
428 | } | |
429 | ||
430 | if (type == P9_RERROR) { | |
431 | int ecode; | |
432 | char *ename; | |
433 | ||
434 | err = p9pdu_readf(req->rc, c->dotu, "s?d", &ename, &ecode); | |
435 | if (err) { | |
436 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", | |
437 | err); | |
438 | return err; | |
439 | } | |
440 | ||
441 | if (c->dotu) | |
442 | err = -ecode; | |
443 | ||
444 | if (!err) { | |
445 | err = p9_errstr2errno(ename, strlen(ename)); | |
446 | ||
447 | /* string match failed */ | |
448 | if (!err) | |
449 | err = -ESERVERFAULT; | |
450 | } | |
451 | ||
452 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); | |
453 | ||
454 | kfree(ename); | |
455 | } else | |
456 | err = 0; | |
457 | ||
458 | return err; | |
459 | } | |
460 | ||
461 | /** | |
462 | * p9_client_flush - flush (cancel) a request | |
463 | * c: client state | |
464 | * req: request to cancel | |
465 | * | |
466 | * This sents a flush for a particular requests and links | |
467 | * the flush request to the original request. The current | |
468 | * code only supports a single flush request although the protocol | |
469 | * allows for multiple flush requests to be sent for a single request. | |
470 | * | |
471 | */ | |
472 | ||
473 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
474 | { | |
475 | struct p9_req_t *req; | |
476 | int16_t oldtag; | |
477 | int err; | |
478 | ||
479 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
480 | if (err) | |
481 | return err; | |
482 | ||
483 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
484 | ||
485 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
486 | if (IS_ERR(req)) | |
487 | return PTR_ERR(req); | |
488 | ||
489 | req->flush_tag = oldtag; | |
490 | ||
491 | /* we don't free anything here because RPC isn't complete */ | |
492 | return 0; | |
493 | } | |
494 | ||
91b8534f EVH |
495 | /** |
496 | * p9_client_rpc - issue a request and wait for a response | |
497 | * @c: client session | |
51a87c55 EVH |
498 | * @type: type of request |
499 | * @fmt: protocol format string (see protocol.c) | |
91b8534f | 500 | * |
51a87c55 | 501 | * Returns request structure (which client must free using p9_free_req) |
91b8534f EVH |
502 | */ |
503 | ||
51a87c55 EVH |
504 | static struct p9_req_t * |
505 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
91b8534f | 506 | { |
51a87c55 EVH |
507 | va_list ap; |
508 | int tag, err; | |
91b8534f EVH |
509 | struct p9_req_t *req; |
510 | unsigned long flags; | |
511 | int sigpending; | |
512 | int flushed = 0; | |
513 | ||
51a87c55 | 514 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f EVH |
515 | |
516 | if (c->status != Connected) | |
51a87c55 | 517 | return ERR_PTR(-EIO); |
91b8534f EVH |
518 | |
519 | if (signal_pending(current)) { | |
520 | sigpending = 1; | |
521 | clear_thread_flag(TIF_SIGPENDING); | |
522 | } else | |
523 | sigpending = 0; | |
524 | ||
525 | tag = P9_NOTAG; | |
51a87c55 | 526 | if (type != P9_TVERSION) { |
91b8534f EVH |
527 | tag = p9_idpool_get(c->tagpool); |
528 | if (tag < 0) | |
51a87c55 | 529 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
530 | } |
531 | ||
532 | req = p9_tag_alloc(c, tag); | |
51a87c55 EVH |
533 | if (IS_ERR(req)) |
534 | return req; | |
91b8534f | 535 | |
51a87c55 EVH |
536 | /* marshall the data */ |
537 | p9pdu_prepare(req->tc, tag, type); | |
538 | va_start(ap, fmt); | |
539 | err = p9pdu_vwritef(req->tc, c->dotu, fmt, ap); | |
540 | va_end(ap); | |
541 | p9pdu_finalize(req->tc); | |
91b8534f EVH |
542 | |
543 | err = c->trans_mod->request(c, req); | |
544 | if (err < 0) { | |
545 | c->status = Disconnected; | |
546 | goto reterr; | |
547 | } | |
548 | ||
549 | /* if it was a flush we just transmitted, return our tag */ | |
51a87c55 EVH |
550 | if (type == P9_TFLUSH) |
551 | return req; | |
91b8534f | 552 | again: |
51a87c55 | 553 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
91b8534f EVH |
554 | err = wait_event_interruptible(*req->wq, |
555 | req->status >= REQ_STATUS_RCVD); | |
51a87c55 | 556 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d (flushed=%d)\n", |
91b8534f EVH |
557 | req->wq, tag, err, flushed); |
558 | ||
559 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 560 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f EVH |
561 | err = req->t_err; |
562 | } else if (err == -ERESTARTSYS && flushed) { | |
51a87c55 | 563 | P9_DPRINTK(P9_DEBUG_MUX, "flushed - going again\n"); |
91b8534f EVH |
564 | goto again; |
565 | } else if (req->status == REQ_STATUS_FLSHD) { | |
51a87c55 | 566 | P9_DPRINTK(P9_DEBUG_MUX, "flushed - erestartsys\n"); |
91b8534f EVH |
567 | err = -ERESTARTSYS; |
568 | } | |
569 | ||
570 | if ((err == -ERESTARTSYS) && (c->status == Connected) && (!flushed)) { | |
51a87c55 | 571 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f EVH |
572 | spin_lock_irqsave(&c->lock, flags); |
573 | if (req->status == REQ_STATUS_SENT) | |
574 | req->status = REQ_STATUS_FLSH; | |
575 | spin_unlock_irqrestore(&c->lock, flags); | |
576 | sigpending = 1; | |
577 | flushed = 1; | |
578 | clear_thread_flag(TIF_SIGPENDING); | |
579 | ||
580 | if (c->trans_mod->cancel(c, req)) { | |
581 | err = p9_client_flush(c, req); | |
582 | if (err == 0) | |
583 | goto again; | |
584 | } | |
585 | } | |
586 | ||
587 | if (sigpending) { | |
588 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
589 | recalc_sigpending(); | |
590 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
591 | } | |
592 | ||
593 | if (err < 0) | |
594 | goto reterr; | |
595 | ||
51a87c55 EVH |
596 | err = p9_check_errors(c, req); |
597 | if (!err) { | |
598 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
599 | return req; | |
91b8534f EVH |
600 | } |
601 | ||
91b8534f | 602 | reterr: |
51a87c55 EVH |
603 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
604 | err); | |
91b8534f | 605 | p9_free_req(c, req); |
51a87c55 | 606 | return ERR_PTR(err); |
91b8534f EVH |
607 | } |
608 | ||
5503ac56 EVH |
609 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
610 | { | |
9f3e9bbe | 611 | int ret; |
5503ac56 | 612 | struct p9_fid *fid; |
cac23d65 | 613 | unsigned long flags; |
5503ac56 | 614 | |
51a87c55 | 615 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
616 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
617 | if (!fid) | |
618 | return ERR_PTR(-ENOMEM); | |
619 | ||
9f3e9bbe | 620 | ret = p9_idpool_get(clnt->fidpool); |
5503ac56 | 621 | if (fid->fid < 0) { |
9f3e9bbe | 622 | ret = -ENOSPC; |
5503ac56 EVH |
623 | goto error; |
624 | } | |
9f3e9bbe | 625 | fid->fid = ret; |
5503ac56 EVH |
626 | |
627 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
628 | fid->mode = -1; | |
629 | fid->rdir_fpos = 0; | |
5503ac56 EVH |
630 | fid->uid = current->fsuid; |
631 | fid->clnt = clnt; | |
632 | fid->aux = NULL; | |
633 | ||
cac23d65 | 634 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 635 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 636 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
637 | |
638 | return fid; | |
639 | ||
640 | error: | |
641 | kfree(fid); | |
9f3e9bbe | 642 | return ERR_PTR(ret); |
5503ac56 EVH |
643 | } |
644 | ||
645 | static void p9_fid_destroy(struct p9_fid *fid) | |
646 | { | |
647 | struct p9_client *clnt; | |
cac23d65 | 648 | unsigned long flags; |
5503ac56 | 649 | |
51a87c55 | 650 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
651 | clnt = fid->clnt; |
652 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 653 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 654 | list_del(&fid->flist); |
cac23d65 | 655 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
656 | kfree(fid); |
657 | } | |
8a0dc95f | 658 | |
51a87c55 | 659 | int p9_client_version(struct p9_client *c) |
bd238fb4 | 660 | { |
6936bf60 | 661 | int err = 0; |
51a87c55 EVH |
662 | struct p9_req_t *req; |
663 | char *version; | |
664 | int msize; | |
bd238fb4 | 665 | |
51a87c55 EVH |
666 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d extended %d\n", |
667 | c->msize, c->dotu); | |
668 | req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize, | |
669 | c->dotu ? "9P2000.u" : "9P2000"); | |
670 | if (IS_ERR(req)) | |
671 | return PTR_ERR(req); | |
6936bf60 | 672 | |
51a87c55 EVH |
673 | err = p9pdu_readf(req->rc, c->dotu, "ds", &msize, &version); |
674 | if (err) { | |
675 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
e7f4b8f1 | 676 | p9pdu_dump(1, req->rc); |
6936bf60 | 677 | goto error; |
51a87c55 | 678 | } |
6936bf60 | 679 | |
51a87c55 EVH |
680 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
681 | if (!memcmp(version, "9P2000.u", 8)) | |
682 | c->dotu = 1; | |
683 | else if (!memcmp(version, "9P2000", 6)) | |
684 | c->dotu = 0; | |
6936bf60 EVH |
685 | else { |
686 | err = -EREMOTEIO; | |
687 | goto error; | |
688 | } | |
689 | ||
51a87c55 EVH |
690 | if (msize < c->msize) |
691 | c->msize = msize; | |
6936bf60 EVH |
692 | |
693 | error: | |
51a87c55 EVH |
694 | kfree(version); |
695 | p9_free_req(c, req); | |
6936bf60 EVH |
696 | |
697 | return err; | |
698 | } | |
51a87c55 | 699 | EXPORT_SYMBOL(p9_client_version); |
6936bf60 EVH |
700 | |
701 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
702 | { | |
703 | int err; | |
704 | struct p9_client *clnt; | |
705 | ||
706 | err = 0; | |
bd238fb4 LI |
707 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
708 | if (!clnt) | |
709 | return ERR_PTR(-ENOMEM); | |
710 | ||
72029fe8 | 711 | clnt->trans_mod = NULL; |
bb8ffdfc | 712 | clnt->trans = NULL; |
bd238fb4 | 713 | spin_lock_init(&clnt->lock); |
bd238fb4 LI |
714 | INIT_LIST_HEAD(&clnt->fidlist); |
715 | clnt->fidpool = p9_idpool_create(); | |
728fc4ef | 716 | if (IS_ERR(clnt->fidpool)) { |
bd238fb4 LI |
717 | err = PTR_ERR(clnt->fidpool); |
718 | clnt->fidpool = NULL; | |
719 | goto error; | |
720 | } | |
721 | ||
fea511a6 EVH |
722 | p9_tag_init(clnt); |
723 | ||
bb8ffdfc EVH |
724 | err = parse_opts(options, clnt); |
725 | if (err < 0) | |
726 | goto error; | |
727 | ||
8a0dc95f EVH |
728 | if (clnt->trans_mod == NULL) { |
729 | err = -EPROTONOSUPPORT; | |
730 | P9_DPRINTK(P9_DEBUG_ERROR, | |
731 | "No transport defined or default transport\n"); | |
732 | goto error; | |
733 | } | |
734 | ||
51a87c55 | 735 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d dotu %d\n", |
8a0dc95f EVH |
736 | clnt, clnt->trans_mod, clnt->msize, clnt->dotu); |
737 | ||
8b81ef58 EVH |
738 | err = clnt->trans_mod->create(clnt, dev_name, options); |
739 | if (err) | |
bd238fb4 | 740 | goto error; |
bd238fb4 | 741 | |
8a0dc95f EVH |
742 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
743 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
744 | ||
6936bf60 | 745 | err = p9_client_version(clnt); |
bd238fb4 LI |
746 | if (err) |
747 | goto error; | |
748 | ||
bd238fb4 LI |
749 | return clnt; |
750 | ||
751 | error: | |
bd238fb4 LI |
752 | p9_client_destroy(clnt); |
753 | return ERR_PTR(err); | |
754 | } | |
755 | EXPORT_SYMBOL(p9_client_create); | |
756 | ||
757 | void p9_client_destroy(struct p9_client *clnt) | |
758 | { | |
759 | struct p9_fid *fid, *fidptr; | |
760 | ||
51a87c55 | 761 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 762 | |
8b81ef58 EVH |
763 | if (clnt->trans_mod) |
764 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 765 | |
72029fe8 TH |
766 | v9fs_put_trans(clnt->trans_mod); |
767 | ||
bd238fb4 LI |
768 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) |
769 | p9_fid_destroy(fid); | |
770 | ||
0af8887e EVH |
771 | if (clnt->fidpool) |
772 | p9_idpool_destroy(clnt->fidpool); | |
773 | ||
fea511a6 EVH |
774 | p9_tag_cleanup(clnt); |
775 | ||
bd238fb4 LI |
776 | kfree(clnt); |
777 | } | |
778 | EXPORT_SYMBOL(p9_client_destroy); | |
779 | ||
780 | void p9_client_disconnect(struct p9_client *clnt) | |
781 | { | |
782 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 783 | clnt->status = Disconnected; |
bd238fb4 LI |
784 | } |
785 | EXPORT_SYMBOL(p9_client_disconnect); | |
786 | ||
787 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, | |
ba17674f | 788 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
789 | { |
790 | int err; | |
51a87c55 | 791 | struct p9_req_t *req; |
bd238fb4 | 792 | struct p9_fid *fid; |
51a87c55 | 793 | struct p9_qid qid; |
bd238fb4 | 794 | |
51a87c55 EVH |
795 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
796 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 797 | err = 0; |
bd238fb4 LI |
798 | |
799 | fid = p9_fid_create(clnt); | |
800 | if (IS_ERR(fid)) { | |
801 | err = PTR_ERR(fid); | |
802 | fid = NULL; | |
803 | goto error; | |
804 | } | |
805 | ||
51a87c55 EVH |
806 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
807 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
808 | if (IS_ERR(req)) { | |
809 | err = PTR_ERR(req); | |
bd238fb4 LI |
810 | goto error; |
811 | } | |
812 | ||
51a87c55 EVH |
813 | err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid); |
814 | if (err) { | |
e7f4b8f1 | 815 | p9pdu_dump(1, req->rc); |
51a87c55 | 816 | p9_free_req(clnt, req); |
bd238fb4 | 817 | goto error; |
51a87c55 | 818 | } |
bd238fb4 | 819 | |
51a87c55 | 820 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
821 | qid.type, |
822 | (unsigned long long)qid.path, | |
823 | qid.version); | |
51a87c55 EVH |
824 | |
825 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
826 | ||
827 | p9_free_req(clnt, req); | |
bd238fb4 LI |
828 | return fid; |
829 | ||
830 | error: | |
bd238fb4 LI |
831 | if (fid) |
832 | p9_fid_destroy(fid); | |
833 | return ERR_PTR(err); | |
834 | } | |
835 | EXPORT_SYMBOL(p9_client_attach); | |
836 | ||
51a87c55 EVH |
837 | struct p9_fid * |
838 | p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) | |
bd238fb4 LI |
839 | { |
840 | int err; | |
51a87c55 EVH |
841 | struct p9_req_t *req; |
842 | struct p9_qid qid; | |
843 | struct p9_fid *afid; | |
bd238fb4 | 844 | |
51a87c55 | 845 | P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); |
bd238fb4 | 846 | err = 0; |
bd238fb4 | 847 | |
51a87c55 EVH |
848 | afid = p9_fid_create(clnt); |
849 | if (IS_ERR(afid)) { | |
850 | err = PTR_ERR(afid); | |
851 | afid = NULL; | |
bd238fb4 LI |
852 | goto error; |
853 | } | |
854 | ||
51a87c55 EVH |
855 | req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", |
856 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
857 | if (IS_ERR(req)) { | |
858 | err = PTR_ERR(req); | |
bd238fb4 LI |
859 | goto error; |
860 | } | |
861 | ||
51a87c55 EVH |
862 | err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid); |
863 | if (err) { | |
e7f4b8f1 | 864 | p9pdu_dump(1, req->rc); |
51a87c55 | 865 | p9_free_req(clnt, req); |
bd238fb4 | 866 | goto error; |
51a87c55 | 867 | } |
bd238fb4 | 868 | |
51a87c55 | 869 | P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", |
b0d5fdef RD |
870 | qid.type, |
871 | (unsigned long long)qid.path, | |
872 | qid.version); | |
51a87c55 EVH |
873 | |
874 | memmove(&afid->qid, &qid, sizeof(struct p9_qid)); | |
875 | p9_free_req(clnt, req); | |
876 | return afid; | |
bd238fb4 LI |
877 | |
878 | error: | |
51a87c55 EVH |
879 | if (afid) |
880 | p9_fid_destroy(afid); | |
bd238fb4 LI |
881 | return ERR_PTR(err); |
882 | } | |
883 | EXPORT_SYMBOL(p9_client_auth); | |
884 | ||
885 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, | |
886 | int clone) | |
887 | { | |
888 | int err; | |
bd238fb4 LI |
889 | struct p9_client *clnt; |
890 | struct p9_fid *fid; | |
51a87c55 EVH |
891 | struct p9_qid *wqids; |
892 | struct p9_req_t *req; | |
893 | int16_t nwqids, count; | |
bd238fb4 | 894 | |
bd238fb4 | 895 | err = 0; |
bd238fb4 LI |
896 | clnt = oldfid->clnt; |
897 | if (clone) { | |
898 | fid = p9_fid_create(clnt); | |
899 | if (IS_ERR(fid)) { | |
900 | err = PTR_ERR(fid); | |
901 | fid = NULL; | |
902 | goto error; | |
903 | } | |
904 | ||
905 | fid->uid = oldfid->uid; | |
906 | } else | |
907 | fid = oldfid; | |
908 | ||
51a87c55 EVH |
909 | |
910 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
911 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
912 | ||
913 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
914 | nwname, wnames); | |
915 | if (IS_ERR(req)) { | |
916 | err = PTR_ERR(req); | |
bd238fb4 LI |
917 | goto error; |
918 | } | |
919 | ||
51a87c55 | 920 | err = p9pdu_readf(req->rc, clnt->dotu, "R", &nwqids, &wqids); |
e7f4b8f1 EVH |
921 | if (err) { |
922 | p9pdu_dump(1, req->rc); | |
923 | p9_free_req(clnt, req); | |
51a87c55 | 924 | goto clunk_fid; |
e7f4b8f1 EVH |
925 | } |
926 | p9_free_req(clnt, req); | |
bd238fb4 | 927 | |
51a87c55 EVH |
928 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
929 | ||
930 | if (nwqids != nwname) { | |
bd238fb4 LI |
931 | err = -ENOENT; |
932 | goto clunk_fid; | |
933 | } | |
934 | ||
51a87c55 EVH |
935 | for (count = 0; count < nwqids; count++) |
936 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
937 | count, wqids[count].type, |
938 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
939 | wqids[count].version); |
940 | ||
bd238fb4 | 941 | if (nwname) |
51a87c55 | 942 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
943 | else |
944 | fid->qid = oldfid->qid; | |
945 | ||
bd238fb4 LI |
946 | return fid; |
947 | ||
948 | clunk_fid: | |
51a87c55 EVH |
949 | p9_client_clunk(fid); |
950 | fid = NULL; | |
bd238fb4 LI |
951 | |
952 | error: | |
bd238fb4 LI |
953 | if (fid && (fid != oldfid)) |
954 | p9_fid_destroy(fid); | |
955 | ||
956 | return ERR_PTR(err); | |
957 | } | |
958 | EXPORT_SYMBOL(p9_client_walk); | |
959 | ||
960 | int p9_client_open(struct p9_fid *fid, int mode) | |
961 | { | |
962 | int err; | |
bd238fb4 | 963 | struct p9_client *clnt; |
51a87c55 EVH |
964 | struct p9_req_t *req; |
965 | struct p9_qid qid; | |
966 | int iounit; | |
bd238fb4 | 967 | |
51a87c55 | 968 | P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); |
bd238fb4 | 969 | err = 0; |
bd238fb4 LI |
970 | clnt = fid->clnt; |
971 | ||
972 | if (fid->mode != -1) | |
973 | return -EINVAL; | |
974 | ||
51a87c55 EVH |
975 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
976 | if (IS_ERR(req)) { | |
977 | err = PTR_ERR(req); | |
978 | goto error; | |
bd238fb4 LI |
979 | } |
980 | ||
51a87c55 | 981 | err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
982 | if (err) { |
983 | p9pdu_dump(1, req->rc); | |
984 | goto free_and_error; | |
985 | } | |
51a87c55 EVH |
986 | |
987 | P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
988 | qid.type, |
989 | (unsigned long long)qid.path, | |
990 | qid.version, iounit); | |
bd238fb4 LI |
991 | |
992 | fid->mode = mode; | |
51a87c55 | 993 | fid->iounit = iounit; |
bd238fb4 | 994 | |
e7f4b8f1 EVH |
995 | free_and_error: |
996 | p9_free_req(clnt, req); | |
51a87c55 | 997 | error: |
bd238fb4 LI |
998 | return err; |
999 | } | |
1000 | EXPORT_SYMBOL(p9_client_open); | |
1001 | ||
1002 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, | |
1003 | char *extension) | |
1004 | { | |
1005 | int err; | |
bd238fb4 | 1006 | struct p9_client *clnt; |
51a87c55 EVH |
1007 | struct p9_req_t *req; |
1008 | struct p9_qid qid; | |
1009 | int iounit; | |
bd238fb4 | 1010 | |
51a87c55 EVH |
1011 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1012 | fid->fid, name, perm, mode); | |
bd238fb4 | 1013 | err = 0; |
bd238fb4 LI |
1014 | clnt = fid->clnt; |
1015 | ||
1016 | if (fid->mode != -1) | |
1017 | return -EINVAL; | |
1018 | ||
51a87c55 EVH |
1019 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1020 | mode, extension); | |
1021 | if (IS_ERR(req)) { | |
1022 | err = PTR_ERR(req); | |
1023 | goto error; | |
bd238fb4 LI |
1024 | } |
1025 | ||
51a87c55 | 1026 | err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1027 | if (err) { |
1028 | p9pdu_dump(1, req->rc); | |
1029 | goto free_and_error; | |
1030 | } | |
51a87c55 EVH |
1031 | |
1032 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1033 | qid.type, |
1034 | (unsigned long long)qid.path, | |
1035 | qid.version, iounit); | |
bd238fb4 LI |
1036 | |
1037 | fid->mode = mode; | |
51a87c55 | 1038 | fid->iounit = iounit; |
bd238fb4 | 1039 | |
e7f4b8f1 EVH |
1040 | free_and_error: |
1041 | p9_free_req(clnt, req); | |
51a87c55 | 1042 | error: |
bd238fb4 LI |
1043 | return err; |
1044 | } | |
1045 | EXPORT_SYMBOL(p9_client_fcreate); | |
1046 | ||
1047 | int p9_client_clunk(struct p9_fid *fid) | |
1048 | { | |
1049 | int err; | |
bd238fb4 | 1050 | struct p9_client *clnt; |
51a87c55 | 1051 | struct p9_req_t *req; |
bd238fb4 | 1052 | |
51a87c55 | 1053 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1054 | err = 0; |
bd238fb4 LI |
1055 | clnt = fid->clnt; |
1056 | ||
51a87c55 EVH |
1057 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1058 | if (IS_ERR(req)) { | |
1059 | err = PTR_ERR(req); | |
1060 | goto error; | |
bd238fb4 LI |
1061 | } |
1062 | ||
51a87c55 | 1063 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1064 | |
51a87c55 | 1065 | p9_free_req(clnt, req); |
bd238fb4 LI |
1066 | p9_fid_destroy(fid); |
1067 | ||
51a87c55 | 1068 | error: |
bd238fb4 LI |
1069 | return err; |
1070 | } | |
1071 | EXPORT_SYMBOL(p9_client_clunk); | |
1072 | ||
1073 | int p9_client_remove(struct p9_fid *fid) | |
1074 | { | |
1075 | int err; | |
bd238fb4 | 1076 | struct p9_client *clnt; |
51a87c55 | 1077 | struct p9_req_t *req; |
bd238fb4 | 1078 | |
51a87c55 | 1079 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1080 | err = 0; |
bd238fb4 LI |
1081 | clnt = fid->clnt; |
1082 | ||
51a87c55 EVH |
1083 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1084 | if (IS_ERR(req)) { | |
1085 | err = PTR_ERR(req); | |
1086 | goto error; | |
bd238fb4 LI |
1087 | } |
1088 | ||
51a87c55 | 1089 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1090 | |
51a87c55 | 1091 | p9_free_req(clnt, req); |
bd238fb4 LI |
1092 | p9_fid_destroy(fid); |
1093 | ||
51a87c55 | 1094 | error: |
bd238fb4 LI |
1095 | return err; |
1096 | } | |
1097 | EXPORT_SYMBOL(p9_client_remove); | |
1098 | ||
0fc9655e EVH |
1099 | int |
1100 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1101 | u32 count) | |
bd238fb4 | 1102 | { |
51a87c55 | 1103 | int err, rsize, total; |
bd238fb4 | 1104 | struct p9_client *clnt; |
51a87c55 EVH |
1105 | struct p9_req_t *req; |
1106 | char *dataptr; | |
bd238fb4 | 1107 | |
51a87c55 | 1108 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
bd238fb4 LI |
1109 | (long long unsigned) offset, count); |
1110 | err = 0; | |
bd238fb4 LI |
1111 | clnt = fid->clnt; |
1112 | total = 0; | |
1113 | ||
1114 | rsize = fid->iounit; | |
1115 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1116 | rsize = clnt->msize - P9_IOHDRSZ; | |
1117 | ||
51a87c55 EVH |
1118 | if (count < rsize) |
1119 | rsize = count; | |
bd238fb4 | 1120 | |
51a87c55 EVH |
1121 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1122 | if (IS_ERR(req)) { | |
1123 | err = PTR_ERR(req); | |
1124 | goto error; | |
1125 | } | |
bd238fb4 | 1126 | |
51a87c55 | 1127 | err = p9pdu_readf(req->rc, clnt->dotu, "D", &count, &dataptr); |
e7f4b8f1 EVH |
1128 | if (err) { |
1129 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1130 | goto free_and_error; |
e7f4b8f1 | 1131 | } |
bd238fb4 | 1132 | |
51a87c55 | 1133 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1134 | |
51a87c55 EVH |
1135 | if (data) { |
1136 | memmove(data, dataptr, count); | |
1137 | data += count; | |
1138 | } | |
bd238fb4 | 1139 | |
51a87c55 EVH |
1140 | if (udata) { |
1141 | err = copy_to_user(udata, dataptr, count); | |
1142 | if (err) { | |
1143 | err = -EFAULT; | |
1144 | goto free_and_error; | |
bd238fb4 | 1145 | } |
51a87c55 | 1146 | } |
bd238fb4 | 1147 | |
51a87c55 EVH |
1148 | p9_free_req(clnt, req); |
1149 | return count; | |
bd238fb4 | 1150 | |
51a87c55 EVH |
1151 | free_and_error: |
1152 | p9_free_req(clnt, req); | |
bd238fb4 | 1153 | error: |
bd238fb4 LI |
1154 | return err; |
1155 | } | |
0fc9655e | 1156 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1157 | |
1158 | int | |
0fc9655e EVH |
1159 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1160 | u64 offset, u32 count) | |
bd238fb4 | 1161 | { |
51a87c55 | 1162 | int err, rsize, total; |
bd238fb4 | 1163 | struct p9_client *clnt; |
51a87c55 | 1164 | struct p9_req_t *req; |
bd238fb4 | 1165 | |
51a87c55 EVH |
1166 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1167 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1168 | err = 0; |
bd238fb4 LI |
1169 | clnt = fid->clnt; |
1170 | total = 0; | |
1171 | ||
1172 | rsize = fid->iounit; | |
1173 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1174 | rsize = clnt->msize - P9_IOHDRSZ; | |
1175 | ||
51a87c55 EVH |
1176 | if (count < rsize) |
1177 | rsize = count; | |
1178 | if (data) | |
1179 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1180 | rsize, data); | |
1181 | else | |
1182 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1183 | rsize, udata); | |
1184 | if (IS_ERR(req)) { | |
1185 | err = PTR_ERR(req); | |
1186 | goto error; | |
1187 | } | |
0fc9655e | 1188 | |
51a87c55 | 1189 | err = p9pdu_readf(req->rc, clnt->dotu, "d", &count); |
e7f4b8f1 EVH |
1190 | if (err) { |
1191 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1192 | goto free_and_error; |
e7f4b8f1 EVH |
1193 | } |
1194 | ||
51a87c55 | 1195 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1196 | |
51a87c55 EVH |
1197 | p9_free_req(clnt, req); |
1198 | return count; | |
bd238fb4 | 1199 | |
51a87c55 EVH |
1200 | free_and_error: |
1201 | p9_free_req(clnt, req); | |
bd238fb4 | 1202 | error: |
bd238fb4 LI |
1203 | return err; |
1204 | } | |
0fc9655e | 1205 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1206 | |
51a87c55 | 1207 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1208 | { |
51a87c55 EVH |
1209 | int err; |
1210 | struct p9_client *clnt; | |
1211 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1212 | struct p9_req_t *req; | |
1213 | u16 ignored; | |
5503ac56 | 1214 | |
51a87c55 | 1215 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1216 | |
5503ac56 EVH |
1217 | if (!ret) |
1218 | return ERR_PTR(-ENOMEM); | |
1219 | ||
bd238fb4 | 1220 | err = 0; |
bd238fb4 LI |
1221 | clnt = fid->clnt; |
1222 | ||
51a87c55 EVH |
1223 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1224 | if (IS_ERR(req)) { | |
1225 | err = PTR_ERR(req); | |
bd238fb4 LI |
1226 | goto error; |
1227 | } | |
1228 | ||
51a87c55 | 1229 | err = p9pdu_readf(req->rc, clnt->dotu, "wS", &ignored, ret); |
e7f4b8f1 EVH |
1230 | if (err) { |
1231 | ret = ERR_PTR(err); | |
1232 | p9pdu_dump(1, req->rc); | |
1233 | goto free_and_error; | |
1234 | } | |
bd238fb4 | 1235 | |
51a87c55 | 1236 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1237 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1238 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1239 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1240 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1241 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1242 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1243 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1244 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1245 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1246 | |
e7f4b8f1 EVH |
1247 | free_and_error: |
1248 | p9_free_req(clnt, req); | |
bd238fb4 | 1249 | error: |
e7f4b8f1 | 1250 | return ret; |
bd238fb4 LI |
1251 | } |
1252 | EXPORT_SYMBOL(p9_client_stat); | |
1253 | ||
1254 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) | |
1255 | { | |
1256 | int err; | |
51a87c55 | 1257 | struct p9_req_t *req; |
bd238fb4 LI |
1258 | struct p9_client *clnt; |
1259 | ||
51a87c55 | 1260 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1261 | P9_DPRINTK(P9_DEBUG_9P, |
1262 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1263 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1264 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1265 | " uid=%d gid=%d n_muid=%d\n", | |
1266 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1267 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1268 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1269 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1270 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1271 | err = 0; |
bd238fb4 LI |
1272 | clnt = fid->clnt; |
1273 | ||
51a87c55 EVH |
1274 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, 0, wst); |
1275 | if (IS_ERR(req)) { | |
1276 | err = PTR_ERR(req); | |
1277 | goto error; | |
bd238fb4 LI |
1278 | } |
1279 | ||
51a87c55 | 1280 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1281 | |
51a87c55 EVH |
1282 | p9_free_req(clnt, req); |
1283 | error: | |
bd238fb4 LI |
1284 | return err; |
1285 | } | |
1286 | EXPORT_SYMBOL(p9_client_wstat); |