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 | 62 | /** |
0e15597e AK |
63 | * parse_options - parse mount options into client structure |
64 | * @opts: options string passed from mount | |
65 | * @clnt: existing v9fs client information | |
8a0dc95f | 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 | { |
d8c8a9e3 | 72 | char *options, *tmp_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 | ||
d8c8a9e3 EVH |
84 | tmp_options = kstrdup(opts, GFP_KERNEL); |
85 | if (!tmp_options) { | |
bb8ffdfc EVH |
86 | P9_DPRINTK(P9_DEBUG_ERROR, |
87 | "failed to allocate copy of option string\n"); | |
88 | return -ENOMEM; | |
89 | } | |
d8c8a9e3 | 90 | options = tmp_options; |
8a0dc95f EVH |
91 | |
92 | while ((p = strsep(&options, ",")) != NULL) { | |
93 | int token; | |
94 | if (!*p) | |
95 | continue; | |
96 | token = match_token(p, tokens, args); | |
97 | if (token < Opt_trans) { | |
bb8ffdfc EVH |
98 | int r = match_int(&args[0], &option); |
99 | if (r < 0) { | |
8a0dc95f EVH |
100 | P9_DPRINTK(P9_DEBUG_ERROR, |
101 | "integer field, but no integer?\n"); | |
bb8ffdfc | 102 | ret = r; |
8a0dc95f EVH |
103 | continue; |
104 | } | |
105 | } | |
106 | switch (token) { | |
107 | case Opt_msize: | |
108 | clnt->msize = option; | |
109 | break; | |
110 | case Opt_trans: | |
72029fe8 | 111 | clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); |
349d3bb8 EVH |
112 | if(clnt->trans_mod == NULL) { |
113 | P9_DPRINTK(P9_DEBUG_ERROR, | |
114 | "Could not find request transport: %s\n", | |
115 | (char *) &args[0]); | |
116 | ret = -EINVAL; | |
117 | goto free_and_return; | |
118 | } | |
8a0dc95f EVH |
119 | break; |
120 | case Opt_legacy: | |
121 | clnt->dotu = 0; | |
122 | break; | |
123 | default: | |
124 | continue; | |
125 | } | |
126 | } | |
72029fe8 | 127 | |
349d3bb8 | 128 | free_and_return: |
d8c8a9e3 | 129 | kfree(tmp_options); |
bb8ffdfc | 130 | return ret; |
8a0dc95f EVH |
131 | } |
132 | ||
fea511a6 EVH |
133 | /** |
134 | * p9_tag_alloc - lookup/allocate a request by tag | |
135 | * @c: client session to lookup tag within | |
136 | * @tag: numeric id for transaction | |
137 | * | |
138 | * this is a simple array lookup, but will grow the | |
139 | * request_slots as necessary to accomodate transaction | |
140 | * ids which did not previously have a slot. | |
141 | * | |
142 | * this code relies on the client spinlock to manage locks, its | |
143 | * possible we should switch to something else, but I'd rather | |
144 | * stick with something low-overhead for the common case. | |
145 | * | |
146 | */ | |
147 | ||
51a87c55 | 148 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) |
fea511a6 EVH |
149 | { |
150 | unsigned long flags; | |
151 | int row, col; | |
51a87c55 | 152 | struct p9_req_t *req; |
fea511a6 EVH |
153 | |
154 | /* This looks up the original request by tag so we know which | |
155 | * buffer to read the data into */ | |
156 | tag++; | |
157 | ||
158 | if (tag >= c->max_tag) { | |
159 | spin_lock_irqsave(&c->lock, flags); | |
160 | /* check again since original check was outside of lock */ | |
161 | while (tag >= c->max_tag) { | |
162 | row = (tag / P9_ROW_MAXTAG); | |
163 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
164 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
165 | ||
166 | if (!c->reqs[row]) { | |
167 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
e45c5405 | 168 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 169 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
170 | } |
171 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
172 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 173 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
174 | } |
175 | c->max_tag += P9_ROW_MAXTAG; | |
176 | } | |
177 | spin_unlock_irqrestore(&c->lock, flags); | |
178 | } | |
179 | row = tag / P9_ROW_MAXTAG; | |
180 | col = tag % P9_ROW_MAXTAG; | |
181 | ||
51a87c55 EVH |
182 | req = &c->reqs[row][col]; |
183 | if (!req->tc) { | |
184 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); | |
185 | if (!req->wq) { | |
186 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
187 | return ERR_PTR(-ENOMEM); | |
188 | } | |
189 | init_waitqueue_head(req->wq); | |
190 | req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
191 | GFP_KERNEL); | |
192 | req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
193 | GFP_KERNEL); | |
194 | if ((!req->tc) || (!req->rc)) { | |
195 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
196 | kfree(req->tc); | |
197 | kfree(req->rc); | |
45abdf1c TT |
198 | kfree(req->wq); |
199 | req->tc = req->rc = NULL; | |
200 | req->wq = NULL; | |
51a87c55 EVH |
201 | return ERR_PTR(-ENOMEM); |
202 | } | |
203 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); | |
204 | req->tc->capacity = c->msize; | |
205 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); | |
206 | req->rc->capacity = c->msize; | |
207 | } | |
208 | ||
209 | p9pdu_reset(req->tc); | |
210 | p9pdu_reset(req->rc); | |
211 | ||
51a87c55 EVH |
212 | req->tc->tag = tag-1; |
213 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
214 | |
215 | return &c->reqs[row][col]; | |
216 | } | |
fea511a6 EVH |
217 | |
218 | /** | |
219 | * p9_tag_lookup - lookup a request by tag | |
220 | * @c: client session to lookup tag within | |
221 | * @tag: numeric id for transaction | |
222 | * | |
223 | */ | |
224 | ||
225 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
226 | { | |
227 | int row, col; | |
228 | ||
229 | /* This looks up the original request by tag so we know which | |
230 | * buffer to read the data into */ | |
231 | tag++; | |
232 | ||
233 | BUG_ON(tag >= c->max_tag); | |
234 | ||
235 | row = tag / P9_ROW_MAXTAG; | |
236 | col = tag % P9_ROW_MAXTAG; | |
237 | ||
238 | return &c->reqs[row][col]; | |
239 | } | |
240 | EXPORT_SYMBOL(p9_tag_lookup); | |
241 | ||
242 | /** | |
243 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 244 | * @c: v9fs client struct |
fea511a6 EVH |
245 | * |
246 | * This initializes the tags structure for each client instance. | |
247 | * | |
248 | */ | |
249 | ||
250 | static int p9_tag_init(struct p9_client *c) | |
251 | { | |
252 | int err = 0; | |
253 | ||
254 | c->tagpool = p9_idpool_create(); | |
255 | if (IS_ERR(c->tagpool)) { | |
256 | err = PTR_ERR(c->tagpool); | |
257 | c->tagpool = NULL; | |
258 | goto error; | |
259 | } | |
260 | ||
261 | p9_idpool_get(c->tagpool); /* reserve tag 0 */ | |
262 | ||
263 | c->max_tag = 0; | |
264 | error: | |
265 | return err; | |
266 | } | |
267 | ||
268 | /** | |
269 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 270 | * @c: v9fs client struct |
fea511a6 EVH |
271 | * |
272 | * This frees resources associated with the tags structure | |
273 | * | |
274 | */ | |
275 | static void p9_tag_cleanup(struct p9_client *c) | |
276 | { | |
277 | int row, col; | |
278 | ||
279 | /* check to insure all requests are idle */ | |
280 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
281 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
282 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
283 | P9_DPRINTK(P9_DEBUG_MUX, | |
284 | "Attempting to cleanup non-free tag %d,%d\n", | |
285 | row, col); | |
286 | /* TODO: delay execution of cleanup */ | |
287 | return; | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
292 | if (c->tagpool) | |
293 | p9_idpool_destroy(c->tagpool); | |
294 | ||
295 | /* free requests associated with tags */ | |
296 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 297 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 298 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
299 | kfree(c->reqs[row][col].tc); |
300 | kfree(c->reqs[row][col].rc); | |
301 | } | |
fea511a6 EVH |
302 | kfree(c->reqs[row]); |
303 | } | |
304 | c->max_tag = 0; | |
305 | } | |
306 | ||
673d62cd EVH |
307 | /** |
308 | * p9_free_req - free a request and clean-up as necessary | |
309 | * c: client state | |
310 | * r: request to release | |
311 | * | |
312 | */ | |
313 | ||
51a87c55 | 314 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 315 | { |
51a87c55 EVH |
316 | int tag = r->tc->tag; |
317 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
318 | ||
673d62cd | 319 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
320 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
321 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
322 | } |
323 | ||
91b8534f EVH |
324 | /** |
325 | * p9_client_cb - call back from transport to client | |
326 | * c: client state | |
327 | * req: request received | |
328 | * | |
329 | */ | |
330 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
331 | { | |
51a87c55 | 332 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 LI |
333 | wake_up(req->wq); |
334 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
91b8534f EVH |
335 | } |
336 | EXPORT_SYMBOL(p9_client_cb); | |
337 | ||
51a87c55 EVH |
338 | /** |
339 | * p9_parse_header - parse header arguments out of a packet | |
340 | * @pdu: packet to parse | |
341 | * @size: size of packet | |
342 | * @type: type of request | |
343 | * @tag: tag of packet | |
344 | * @rewind: set if we need to rewind offset afterwards | |
345 | */ | |
346 | ||
347 | int | |
348 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
349 | int rewind) | |
350 | { | |
351 | int8_t r_type; | |
352 | int16_t r_tag; | |
353 | int32_t r_size; | |
354 | int offset = pdu->offset; | |
355 | int err; | |
356 | ||
357 | pdu->offset = 0; | |
358 | if (pdu->size == 0) | |
359 | pdu->size = 7; | |
360 | ||
361 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
362 | if (err) | |
363 | goto rewind_and_exit; | |
364 | ||
365 | pdu->size = r_size; | |
366 | pdu->id = r_type; | |
367 | pdu->tag = r_tag; | |
368 | ||
e7f4b8f1 EVH |
369 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
370 | pdu->id, pdu->tag); | |
51a87c55 EVH |
371 | |
372 | if (type) | |
373 | *type = r_type; | |
374 | if (tag) | |
375 | *tag = r_tag; | |
376 | if (size) | |
377 | *size = r_size; | |
378 | ||
379 | ||
380 | rewind_and_exit: | |
381 | if (rewind) | |
382 | pdu->offset = offset; | |
383 | return err; | |
384 | } | |
385 | EXPORT_SYMBOL(p9_parse_header); | |
386 | ||
387 | /** | |
388 | * p9_check_errors - check 9p packet for error return and process it | |
389 | * @c: current client instance | |
390 | * @req: request to parse and check for error conditions | |
391 | * | |
392 | * returns error code if one is discovered, otherwise returns 0 | |
393 | * | |
394 | * this will have to be more complicated if we have multiple | |
395 | * error packet types | |
396 | */ | |
397 | ||
398 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
399 | { | |
400 | int8_t type; | |
401 | int err; | |
402 | ||
403 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
404 | if (err) { | |
405 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
406 | return err; | |
407 | } | |
408 | ||
409 | if (type == P9_RERROR) { | |
410 | int ecode; | |
411 | char *ename; | |
412 | ||
413 | err = p9pdu_readf(req->rc, c->dotu, "s?d", &ename, &ecode); | |
414 | if (err) { | |
415 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", | |
416 | err); | |
417 | return err; | |
418 | } | |
419 | ||
420 | if (c->dotu) | |
421 | err = -ecode; | |
422 | ||
0aad37ef | 423 | if (!err || !IS_ERR_VALUE(err)) |
51a87c55 EVH |
424 | err = p9_errstr2errno(ename, strlen(ename)); |
425 | ||
51a87c55 EVH |
426 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); |
427 | ||
428 | kfree(ename); | |
429 | } else | |
430 | err = 0; | |
431 | ||
432 | return err; | |
433 | } | |
434 | ||
435 | /** | |
436 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
437 | * @c: client state |
438 | * @oldreq: request to cancel | |
51a87c55 EVH |
439 | * |
440 | * This sents a flush for a particular requests and links | |
441 | * the flush request to the original request. The current | |
442 | * code only supports a single flush request although the protocol | |
443 | * allows for multiple flush requests to be sent for a single request. | |
444 | * | |
445 | */ | |
446 | ||
447 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
448 | { | |
449 | struct p9_req_t *req; | |
450 | int16_t oldtag; | |
451 | int err; | |
452 | ||
453 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
454 | if (err) | |
455 | return err; | |
456 | ||
457 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
458 | ||
459 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
460 | if (IS_ERR(req)) | |
461 | return PTR_ERR(req); | |
462 | ||
51a87c55 | 463 | |
1bab88b2 LI |
464 | /* if we haven't received a response for oldreq, |
465 | remove it from the list. */ | |
466 | spin_lock(&c->lock); | |
467 | if (oldreq->status == REQ_STATUS_FLSH) | |
468 | list_del(&oldreq->req_list); | |
469 | spin_unlock(&c->lock); | |
470 | ||
471 | p9_free_req(c, req); | |
51a87c55 EVH |
472 | return 0; |
473 | } | |
474 | ||
91b8534f EVH |
475 | /** |
476 | * p9_client_rpc - issue a request and wait for a response | |
477 | * @c: client session | |
51a87c55 EVH |
478 | * @type: type of request |
479 | * @fmt: protocol format string (see protocol.c) | |
91b8534f | 480 | * |
51a87c55 | 481 | * Returns request structure (which client must free using p9_free_req) |
91b8534f EVH |
482 | */ |
483 | ||
51a87c55 EVH |
484 | static struct p9_req_t * |
485 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
91b8534f | 486 | { |
51a87c55 EVH |
487 | va_list ap; |
488 | int tag, err; | |
91b8534f EVH |
489 | struct p9_req_t *req; |
490 | unsigned long flags; | |
491 | int sigpending; | |
91b8534f | 492 | |
51a87c55 | 493 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f EVH |
494 | |
495 | if (c->status != Connected) | |
51a87c55 | 496 | return ERR_PTR(-EIO); |
91b8534f EVH |
497 | |
498 | if (signal_pending(current)) { | |
499 | sigpending = 1; | |
500 | clear_thread_flag(TIF_SIGPENDING); | |
501 | } else | |
502 | sigpending = 0; | |
503 | ||
504 | tag = P9_NOTAG; | |
51a87c55 | 505 | if (type != P9_TVERSION) { |
91b8534f EVH |
506 | tag = p9_idpool_get(c->tagpool); |
507 | if (tag < 0) | |
51a87c55 | 508 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
509 | } |
510 | ||
511 | req = p9_tag_alloc(c, tag); | |
51a87c55 EVH |
512 | if (IS_ERR(req)) |
513 | return req; | |
91b8534f | 514 | |
51a87c55 EVH |
515 | /* marshall the data */ |
516 | p9pdu_prepare(req->tc, tag, type); | |
517 | va_start(ap, fmt); | |
518 | err = p9pdu_vwritef(req->tc, c->dotu, fmt, ap); | |
519 | va_end(ap); | |
520 | p9pdu_finalize(req->tc); | |
91b8534f EVH |
521 | |
522 | err = c->trans_mod->request(c, req); | |
523 | if (err < 0) { | |
524 | c->status = Disconnected; | |
525 | goto reterr; | |
526 | } | |
527 | ||
51a87c55 | 528 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
91b8534f EVH |
529 | err = wait_event_interruptible(*req->wq, |
530 | req->status >= REQ_STATUS_RCVD); | |
1bab88b2 LI |
531 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
532 | req->wq, tag, err); | |
91b8534f EVH |
533 | |
534 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 535 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 536 | err = req->t_err; |
91b8534f EVH |
537 | } |
538 | ||
1bab88b2 | 539 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
51a87c55 | 540 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 541 | sigpending = 1; |
91b8534f EVH |
542 | clear_thread_flag(TIF_SIGPENDING); |
543 | ||
1bab88b2 LI |
544 | if (c->trans_mod->cancel(c, req)) |
545 | p9_client_flush(c, req); | |
546 | ||
547 | /* if we received the response anyway, don't signal error */ | |
548 | if (req->status == REQ_STATUS_RCVD) | |
549 | err = 0; | |
91b8534f EVH |
550 | } |
551 | ||
552 | if (sigpending) { | |
553 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
554 | recalc_sigpending(); | |
555 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
556 | } | |
557 | ||
558 | if (err < 0) | |
559 | goto reterr; | |
560 | ||
51a87c55 EVH |
561 | err = p9_check_errors(c, req); |
562 | if (!err) { | |
563 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
564 | return req; | |
91b8534f EVH |
565 | } |
566 | ||
91b8534f | 567 | reterr: |
51a87c55 EVH |
568 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
569 | err); | |
91b8534f | 570 | p9_free_req(c, req); |
51a87c55 | 571 | return ERR_PTR(err); |
91b8534f EVH |
572 | } |
573 | ||
5503ac56 EVH |
574 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
575 | { | |
9f3e9bbe | 576 | int ret; |
5503ac56 | 577 | struct p9_fid *fid; |
cac23d65 | 578 | unsigned long flags; |
5503ac56 | 579 | |
51a87c55 | 580 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
581 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
582 | if (!fid) | |
583 | return ERR_PTR(-ENOMEM); | |
584 | ||
9f3e9bbe | 585 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 586 | if (ret < 0) { |
9f3e9bbe | 587 | ret = -ENOSPC; |
5503ac56 EVH |
588 | goto error; |
589 | } | |
9f3e9bbe | 590 | fid->fid = ret; |
5503ac56 EVH |
591 | |
592 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
593 | fid->mode = -1; | |
f8b9d53a | 594 | fid->uid = current_fsuid(); |
5503ac56 | 595 | fid->clnt = clnt; |
3e2796a9 | 596 | fid->rdir = NULL; |
cac23d65 | 597 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 598 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 599 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
600 | |
601 | return fid; | |
602 | ||
603 | error: | |
604 | kfree(fid); | |
9f3e9bbe | 605 | return ERR_PTR(ret); |
5503ac56 EVH |
606 | } |
607 | ||
608 | static void p9_fid_destroy(struct p9_fid *fid) | |
609 | { | |
610 | struct p9_client *clnt; | |
cac23d65 | 611 | unsigned long flags; |
5503ac56 | 612 | |
51a87c55 | 613 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
614 | clnt = fid->clnt; |
615 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 616 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 617 | list_del(&fid->flist); |
cac23d65 | 618 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 619 | kfree(fid->rdir); |
5503ac56 EVH |
620 | kfree(fid); |
621 | } | |
8a0dc95f | 622 | |
51a87c55 | 623 | int p9_client_version(struct p9_client *c) |
bd238fb4 | 624 | { |
6936bf60 | 625 | int err = 0; |
51a87c55 EVH |
626 | struct p9_req_t *req; |
627 | char *version; | |
628 | int msize; | |
bd238fb4 | 629 | |
51a87c55 EVH |
630 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d extended %d\n", |
631 | c->msize, c->dotu); | |
632 | req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize, | |
633 | c->dotu ? "9P2000.u" : "9P2000"); | |
634 | if (IS_ERR(req)) | |
635 | return PTR_ERR(req); | |
6936bf60 | 636 | |
51a87c55 EVH |
637 | err = p9pdu_readf(req->rc, c->dotu, "ds", &msize, &version); |
638 | if (err) { | |
639 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
e7f4b8f1 | 640 | p9pdu_dump(1, req->rc); |
6936bf60 | 641 | goto error; |
51a87c55 | 642 | } |
6936bf60 | 643 | |
51a87c55 EVH |
644 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
645 | if (!memcmp(version, "9P2000.u", 8)) | |
646 | c->dotu = 1; | |
647 | else if (!memcmp(version, "9P2000", 6)) | |
648 | c->dotu = 0; | |
6936bf60 EVH |
649 | else { |
650 | err = -EREMOTEIO; | |
651 | goto error; | |
652 | } | |
653 | ||
51a87c55 EVH |
654 | if (msize < c->msize) |
655 | c->msize = msize; | |
6936bf60 EVH |
656 | |
657 | error: | |
51a87c55 EVH |
658 | kfree(version); |
659 | p9_free_req(c, req); | |
6936bf60 EVH |
660 | |
661 | return err; | |
662 | } | |
51a87c55 | 663 | EXPORT_SYMBOL(p9_client_version); |
6936bf60 EVH |
664 | |
665 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
666 | { | |
667 | int err; | |
668 | struct p9_client *clnt; | |
669 | ||
670 | err = 0; | |
bd238fb4 LI |
671 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
672 | if (!clnt) | |
673 | return ERR_PTR(-ENOMEM); | |
674 | ||
72029fe8 | 675 | clnt->trans_mod = NULL; |
bb8ffdfc | 676 | clnt->trans = NULL; |
bd238fb4 | 677 | spin_lock_init(&clnt->lock); |
bd238fb4 | 678 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 679 | |
fea511a6 EVH |
680 | p9_tag_init(clnt); |
681 | ||
bb8ffdfc EVH |
682 | err = parse_opts(options, clnt); |
683 | if (err < 0) | |
8781ff94 | 684 | goto free_client; |
bb8ffdfc | 685 | |
a17d1720 AK |
686 | if (!clnt->trans_mod) |
687 | clnt->trans_mod = v9fs_get_default_trans(); | |
688 | ||
8a0dc95f EVH |
689 | if (clnt->trans_mod == NULL) { |
690 | err = -EPROTONOSUPPORT; | |
691 | P9_DPRINTK(P9_DEBUG_ERROR, | |
692 | "No transport defined or default transport\n"); | |
8781ff94 EVH |
693 | goto free_client; |
694 | } | |
695 | ||
696 | clnt->fidpool = p9_idpool_create(); | |
697 | if (IS_ERR(clnt->fidpool)) { | |
698 | err = PTR_ERR(clnt->fidpool); | |
699 | clnt->fidpool = NULL; | |
700 | goto put_trans; | |
8a0dc95f EVH |
701 | } |
702 | ||
51a87c55 | 703 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d dotu %d\n", |
8a0dc95f EVH |
704 | clnt, clnt->trans_mod, clnt->msize, clnt->dotu); |
705 | ||
8b81ef58 EVH |
706 | err = clnt->trans_mod->create(clnt, dev_name, options); |
707 | if (err) | |
8781ff94 | 708 | goto destroy_fidpool; |
bd238fb4 | 709 | |
8a0dc95f EVH |
710 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
711 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
712 | ||
6936bf60 | 713 | err = p9_client_version(clnt); |
bd238fb4 | 714 | if (err) |
8781ff94 | 715 | goto close_trans; |
bd238fb4 | 716 | |
bd238fb4 LI |
717 | return clnt; |
718 | ||
8781ff94 EVH |
719 | close_trans: |
720 | clnt->trans_mod->close(clnt); | |
721 | destroy_fidpool: | |
722 | p9_idpool_destroy(clnt->fidpool); | |
723 | put_trans: | |
724 | v9fs_put_trans(clnt->trans_mod); | |
725 | free_client: | |
726 | kfree(clnt); | |
bd238fb4 LI |
727 | return ERR_PTR(err); |
728 | } | |
729 | EXPORT_SYMBOL(p9_client_create); | |
730 | ||
731 | void p9_client_destroy(struct p9_client *clnt) | |
732 | { | |
733 | struct p9_fid *fid, *fidptr; | |
734 | ||
51a87c55 | 735 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 736 | |
8b81ef58 EVH |
737 | if (clnt->trans_mod) |
738 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 739 | |
72029fe8 TH |
740 | v9fs_put_trans(clnt->trans_mod); |
741 | ||
bd238fb4 LI |
742 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) |
743 | p9_fid_destroy(fid); | |
744 | ||
0af8887e EVH |
745 | if (clnt->fidpool) |
746 | p9_idpool_destroy(clnt->fidpool); | |
747 | ||
fea511a6 EVH |
748 | p9_tag_cleanup(clnt); |
749 | ||
bd238fb4 LI |
750 | kfree(clnt); |
751 | } | |
752 | EXPORT_SYMBOL(p9_client_destroy); | |
753 | ||
754 | void p9_client_disconnect(struct p9_client *clnt) | |
755 | { | |
756 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 757 | clnt->status = Disconnected; |
bd238fb4 LI |
758 | } |
759 | EXPORT_SYMBOL(p9_client_disconnect); | |
760 | ||
761 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, | |
ba17674f | 762 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
763 | { |
764 | int err; | |
51a87c55 | 765 | struct p9_req_t *req; |
bd238fb4 | 766 | struct p9_fid *fid; |
51a87c55 | 767 | struct p9_qid qid; |
bd238fb4 | 768 | |
51a87c55 EVH |
769 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
770 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 771 | err = 0; |
bd238fb4 LI |
772 | |
773 | fid = p9_fid_create(clnt); | |
774 | if (IS_ERR(fid)) { | |
775 | err = PTR_ERR(fid); | |
776 | fid = NULL; | |
777 | goto error; | |
778 | } | |
779 | ||
51a87c55 EVH |
780 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
781 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
782 | if (IS_ERR(req)) { | |
783 | err = PTR_ERR(req); | |
bd238fb4 LI |
784 | goto error; |
785 | } | |
786 | ||
51a87c55 EVH |
787 | err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid); |
788 | if (err) { | |
e7f4b8f1 | 789 | p9pdu_dump(1, req->rc); |
51a87c55 | 790 | p9_free_req(clnt, req); |
bd238fb4 | 791 | goto error; |
51a87c55 | 792 | } |
bd238fb4 | 793 | |
51a87c55 | 794 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
795 | qid.type, |
796 | (unsigned long long)qid.path, | |
797 | qid.version); | |
51a87c55 EVH |
798 | |
799 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
800 | ||
801 | p9_free_req(clnt, req); | |
bd238fb4 LI |
802 | return fid; |
803 | ||
804 | error: | |
bd238fb4 LI |
805 | if (fid) |
806 | p9_fid_destroy(fid); | |
807 | return ERR_PTR(err); | |
808 | } | |
809 | EXPORT_SYMBOL(p9_client_attach); | |
810 | ||
51a87c55 EVH |
811 | struct p9_fid * |
812 | p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) | |
bd238fb4 LI |
813 | { |
814 | int err; | |
51a87c55 EVH |
815 | struct p9_req_t *req; |
816 | struct p9_qid qid; | |
817 | struct p9_fid *afid; | |
bd238fb4 | 818 | |
51a87c55 | 819 | P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); |
bd238fb4 | 820 | err = 0; |
bd238fb4 | 821 | |
51a87c55 EVH |
822 | afid = p9_fid_create(clnt); |
823 | if (IS_ERR(afid)) { | |
824 | err = PTR_ERR(afid); | |
825 | afid = NULL; | |
bd238fb4 LI |
826 | goto error; |
827 | } | |
828 | ||
51a87c55 EVH |
829 | req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", |
830 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
831 | if (IS_ERR(req)) { | |
832 | err = PTR_ERR(req); | |
bd238fb4 LI |
833 | goto error; |
834 | } | |
835 | ||
51a87c55 EVH |
836 | err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid); |
837 | if (err) { | |
e7f4b8f1 | 838 | p9pdu_dump(1, req->rc); |
51a87c55 | 839 | p9_free_req(clnt, req); |
bd238fb4 | 840 | goto error; |
51a87c55 | 841 | } |
bd238fb4 | 842 | |
51a87c55 | 843 | P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", |
b0d5fdef RD |
844 | qid.type, |
845 | (unsigned long long)qid.path, | |
846 | qid.version); | |
51a87c55 EVH |
847 | |
848 | memmove(&afid->qid, &qid, sizeof(struct p9_qid)); | |
849 | p9_free_req(clnt, req); | |
850 | return afid; | |
bd238fb4 LI |
851 | |
852 | error: | |
51a87c55 EVH |
853 | if (afid) |
854 | p9_fid_destroy(afid); | |
bd238fb4 LI |
855 | return ERR_PTR(err); |
856 | } | |
857 | EXPORT_SYMBOL(p9_client_auth); | |
858 | ||
859 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, | |
860 | int clone) | |
861 | { | |
862 | int err; | |
bd238fb4 LI |
863 | struct p9_client *clnt; |
864 | struct p9_fid *fid; | |
51a87c55 EVH |
865 | struct p9_qid *wqids; |
866 | struct p9_req_t *req; | |
867 | int16_t nwqids, count; | |
bd238fb4 | 868 | |
bd238fb4 | 869 | err = 0; |
bd238fb4 LI |
870 | clnt = oldfid->clnt; |
871 | if (clone) { | |
872 | fid = p9_fid_create(clnt); | |
873 | if (IS_ERR(fid)) { | |
874 | err = PTR_ERR(fid); | |
875 | fid = NULL; | |
876 | goto error; | |
877 | } | |
878 | ||
879 | fid->uid = oldfid->uid; | |
880 | } else | |
881 | fid = oldfid; | |
882 | ||
51a87c55 EVH |
883 | |
884 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
885 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
886 | ||
887 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
888 | nwname, wnames); | |
889 | if (IS_ERR(req)) { | |
890 | err = PTR_ERR(req); | |
bd238fb4 LI |
891 | goto error; |
892 | } | |
893 | ||
51a87c55 | 894 | err = p9pdu_readf(req->rc, clnt->dotu, "R", &nwqids, &wqids); |
e7f4b8f1 EVH |
895 | if (err) { |
896 | p9pdu_dump(1, req->rc); | |
897 | p9_free_req(clnt, req); | |
51a87c55 | 898 | goto clunk_fid; |
e7f4b8f1 EVH |
899 | } |
900 | p9_free_req(clnt, req); | |
bd238fb4 | 901 | |
51a87c55 EVH |
902 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
903 | ||
904 | if (nwqids != nwname) { | |
bd238fb4 LI |
905 | err = -ENOENT; |
906 | goto clunk_fid; | |
907 | } | |
908 | ||
51a87c55 EVH |
909 | for (count = 0; count < nwqids; count++) |
910 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
911 | count, wqids[count].type, |
912 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
913 | wqids[count].version); |
914 | ||
bd238fb4 | 915 | if (nwname) |
51a87c55 | 916 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
917 | else |
918 | fid->qid = oldfid->qid; | |
919 | ||
bd238fb4 LI |
920 | return fid; |
921 | ||
922 | clunk_fid: | |
51a87c55 EVH |
923 | p9_client_clunk(fid); |
924 | fid = NULL; | |
bd238fb4 LI |
925 | |
926 | error: | |
bd238fb4 LI |
927 | if (fid && (fid != oldfid)) |
928 | p9_fid_destroy(fid); | |
929 | ||
930 | return ERR_PTR(err); | |
931 | } | |
932 | EXPORT_SYMBOL(p9_client_walk); | |
933 | ||
934 | int p9_client_open(struct p9_fid *fid, int mode) | |
935 | { | |
936 | int err; | |
bd238fb4 | 937 | struct p9_client *clnt; |
51a87c55 EVH |
938 | struct p9_req_t *req; |
939 | struct p9_qid qid; | |
940 | int iounit; | |
bd238fb4 | 941 | |
51a87c55 | 942 | P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); |
bd238fb4 | 943 | err = 0; |
bd238fb4 LI |
944 | clnt = fid->clnt; |
945 | ||
946 | if (fid->mode != -1) | |
947 | return -EINVAL; | |
948 | ||
51a87c55 EVH |
949 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
950 | if (IS_ERR(req)) { | |
951 | err = PTR_ERR(req); | |
952 | goto error; | |
bd238fb4 LI |
953 | } |
954 | ||
51a87c55 | 955 | err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
956 | if (err) { |
957 | p9pdu_dump(1, req->rc); | |
958 | goto free_and_error; | |
959 | } | |
51a87c55 EVH |
960 | |
961 | P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
962 | qid.type, |
963 | (unsigned long long)qid.path, | |
964 | qid.version, iounit); | |
bd238fb4 LI |
965 | |
966 | fid->mode = mode; | |
51a87c55 | 967 | fid->iounit = iounit; |
bd238fb4 | 968 | |
e7f4b8f1 EVH |
969 | free_and_error: |
970 | p9_free_req(clnt, req); | |
51a87c55 | 971 | error: |
bd238fb4 LI |
972 | return err; |
973 | } | |
974 | EXPORT_SYMBOL(p9_client_open); | |
975 | ||
976 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, | |
977 | char *extension) | |
978 | { | |
979 | int err; | |
bd238fb4 | 980 | struct p9_client *clnt; |
51a87c55 EVH |
981 | struct p9_req_t *req; |
982 | struct p9_qid qid; | |
983 | int iounit; | |
bd238fb4 | 984 | |
51a87c55 EVH |
985 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
986 | fid->fid, name, perm, mode); | |
bd238fb4 | 987 | err = 0; |
bd238fb4 LI |
988 | clnt = fid->clnt; |
989 | ||
990 | if (fid->mode != -1) | |
991 | return -EINVAL; | |
992 | ||
51a87c55 EVH |
993 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
994 | mode, extension); | |
995 | if (IS_ERR(req)) { | |
996 | err = PTR_ERR(req); | |
997 | goto error; | |
bd238fb4 LI |
998 | } |
999 | ||
51a87c55 | 1000 | err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1001 | if (err) { |
1002 | p9pdu_dump(1, req->rc); | |
1003 | goto free_and_error; | |
1004 | } | |
51a87c55 EVH |
1005 | |
1006 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1007 | qid.type, |
1008 | (unsigned long long)qid.path, | |
1009 | qid.version, iounit); | |
bd238fb4 LI |
1010 | |
1011 | fid->mode = mode; | |
51a87c55 | 1012 | fid->iounit = iounit; |
bd238fb4 | 1013 | |
e7f4b8f1 EVH |
1014 | free_and_error: |
1015 | p9_free_req(clnt, req); | |
51a87c55 | 1016 | error: |
bd238fb4 LI |
1017 | return err; |
1018 | } | |
1019 | EXPORT_SYMBOL(p9_client_fcreate); | |
1020 | ||
1021 | int p9_client_clunk(struct p9_fid *fid) | |
1022 | { | |
1023 | int err; | |
bd238fb4 | 1024 | struct p9_client *clnt; |
51a87c55 | 1025 | struct p9_req_t *req; |
bd238fb4 | 1026 | |
51a87c55 | 1027 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1028 | err = 0; |
bd238fb4 LI |
1029 | clnt = fid->clnt; |
1030 | ||
51a87c55 EVH |
1031 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1032 | if (IS_ERR(req)) { | |
1033 | err = PTR_ERR(req); | |
1034 | goto error; | |
bd238fb4 LI |
1035 | } |
1036 | ||
51a87c55 | 1037 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1038 | |
51a87c55 | 1039 | p9_free_req(clnt, req); |
bd238fb4 LI |
1040 | p9_fid_destroy(fid); |
1041 | ||
51a87c55 | 1042 | error: |
bd238fb4 LI |
1043 | return err; |
1044 | } | |
1045 | EXPORT_SYMBOL(p9_client_clunk); | |
1046 | ||
1047 | int p9_client_remove(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, ">>> TREMOVE 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_TREMOVE, "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, "<<< RREMOVE 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_remove); | |
1072 | ||
0fc9655e EVH |
1073 | int |
1074 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1075 | u32 count) | |
bd238fb4 | 1076 | { |
51a87c55 | 1077 | int err, rsize, total; |
bd238fb4 | 1078 | struct p9_client *clnt; |
51a87c55 EVH |
1079 | struct p9_req_t *req; |
1080 | char *dataptr; | |
bd238fb4 | 1081 | |
51a87c55 | 1082 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
bd238fb4 LI |
1083 | (long long unsigned) offset, count); |
1084 | err = 0; | |
bd238fb4 LI |
1085 | clnt = fid->clnt; |
1086 | total = 0; | |
1087 | ||
1088 | rsize = fid->iounit; | |
1089 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1090 | rsize = clnt->msize - P9_IOHDRSZ; | |
1091 | ||
51a87c55 EVH |
1092 | if (count < rsize) |
1093 | rsize = count; | |
bd238fb4 | 1094 | |
51a87c55 EVH |
1095 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1096 | if (IS_ERR(req)) { | |
1097 | err = PTR_ERR(req); | |
1098 | goto error; | |
1099 | } | |
bd238fb4 | 1100 | |
51a87c55 | 1101 | err = p9pdu_readf(req->rc, clnt->dotu, "D", &count, &dataptr); |
e7f4b8f1 EVH |
1102 | if (err) { |
1103 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1104 | goto free_and_error; |
e7f4b8f1 | 1105 | } |
bd238fb4 | 1106 | |
51a87c55 | 1107 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1108 | |
51a87c55 EVH |
1109 | if (data) { |
1110 | memmove(data, dataptr, count); | |
51a87c55 | 1111 | } |
bd238fb4 | 1112 | |
51a87c55 EVH |
1113 | if (udata) { |
1114 | err = copy_to_user(udata, dataptr, count); | |
1115 | if (err) { | |
1116 | err = -EFAULT; | |
1117 | goto free_and_error; | |
bd238fb4 | 1118 | } |
51a87c55 | 1119 | } |
bd238fb4 | 1120 | |
51a87c55 EVH |
1121 | p9_free_req(clnt, req); |
1122 | return count; | |
bd238fb4 | 1123 | |
51a87c55 EVH |
1124 | free_and_error: |
1125 | p9_free_req(clnt, req); | |
bd238fb4 | 1126 | error: |
bd238fb4 LI |
1127 | return err; |
1128 | } | |
0fc9655e | 1129 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1130 | |
1131 | int | |
0fc9655e EVH |
1132 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1133 | u64 offset, u32 count) | |
bd238fb4 | 1134 | { |
51a87c55 | 1135 | int err, rsize, total; |
bd238fb4 | 1136 | struct p9_client *clnt; |
51a87c55 | 1137 | struct p9_req_t *req; |
bd238fb4 | 1138 | |
51a87c55 EVH |
1139 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1140 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1141 | err = 0; |
bd238fb4 LI |
1142 | clnt = fid->clnt; |
1143 | total = 0; | |
1144 | ||
1145 | rsize = fid->iounit; | |
1146 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1147 | rsize = clnt->msize - P9_IOHDRSZ; | |
1148 | ||
51a87c55 EVH |
1149 | if (count < rsize) |
1150 | rsize = count; | |
1151 | if (data) | |
1152 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1153 | rsize, data); | |
1154 | else | |
1155 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1156 | rsize, udata); | |
1157 | if (IS_ERR(req)) { | |
1158 | err = PTR_ERR(req); | |
1159 | goto error; | |
1160 | } | |
0fc9655e | 1161 | |
51a87c55 | 1162 | err = p9pdu_readf(req->rc, clnt->dotu, "d", &count); |
e7f4b8f1 EVH |
1163 | if (err) { |
1164 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1165 | goto free_and_error; |
e7f4b8f1 EVH |
1166 | } |
1167 | ||
51a87c55 | 1168 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1169 | |
51a87c55 EVH |
1170 | p9_free_req(clnt, req); |
1171 | return count; | |
bd238fb4 | 1172 | |
51a87c55 EVH |
1173 | free_and_error: |
1174 | p9_free_req(clnt, req); | |
bd238fb4 | 1175 | error: |
bd238fb4 LI |
1176 | return err; |
1177 | } | |
0fc9655e | 1178 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1179 | |
51a87c55 | 1180 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1181 | { |
51a87c55 EVH |
1182 | int err; |
1183 | struct p9_client *clnt; | |
1184 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1185 | struct p9_req_t *req; | |
1186 | u16 ignored; | |
5503ac56 | 1187 | |
51a87c55 | 1188 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1189 | |
5503ac56 EVH |
1190 | if (!ret) |
1191 | return ERR_PTR(-ENOMEM); | |
1192 | ||
bd238fb4 | 1193 | err = 0; |
bd238fb4 LI |
1194 | clnt = fid->clnt; |
1195 | ||
51a87c55 EVH |
1196 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1197 | if (IS_ERR(req)) { | |
1198 | err = PTR_ERR(req); | |
bd238fb4 LI |
1199 | goto error; |
1200 | } | |
1201 | ||
51a87c55 | 1202 | err = p9pdu_readf(req->rc, clnt->dotu, "wS", &ignored, ret); |
e7f4b8f1 | 1203 | if (err) { |
e7f4b8f1 | 1204 | p9pdu_dump(1, req->rc); |
eedfe1c4 AK |
1205 | p9_free_req(clnt, req); |
1206 | goto error; | |
e7f4b8f1 | 1207 | } |
bd238fb4 | 1208 | |
51a87c55 | 1209 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1210 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1211 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1212 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1213 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1214 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1215 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1216 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1217 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1218 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1219 | |
742b11a7 LI |
1220 | p9_free_req(clnt, req); |
1221 | return ret; | |
1222 | ||
bd238fb4 | 1223 | error: |
742b11a7 LI |
1224 | kfree(ret); |
1225 | return ERR_PTR(err); | |
bd238fb4 LI |
1226 | } |
1227 | EXPORT_SYMBOL(p9_client_stat); | |
1228 | ||
453ed90d LI |
1229 | static int p9_client_statsize(struct p9_wstat *wst, int optional) |
1230 | { | |
1231 | int ret; | |
1232 | ||
9d6939da | 1233 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1234 | /* size[2] type[2] dev[4] qid[13] */ |
1235 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1236 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1237 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1238 | |
1239 | if (wst->name) | |
1240 | ret += strlen(wst->name); | |
1241 | if (wst->uid) | |
1242 | ret += strlen(wst->uid); | |
1243 | if (wst->gid) | |
1244 | ret += strlen(wst->gid); | |
1245 | if (wst->muid) | |
1246 | ret += strlen(wst->muid); | |
1247 | ||
1248 | if (optional) { | |
1249 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ | |
1250 | if (wst->extension) | |
1251 | ret += strlen(wst->extension); | |
1252 | } | |
1253 | ||
1254 | return ret; | |
1255 | } | |
1256 | ||
bd238fb4 LI |
1257 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1258 | { | |
1259 | int err; | |
51a87c55 | 1260 | struct p9_req_t *req; |
bd238fb4 LI |
1261 | struct p9_client *clnt; |
1262 | ||
453ed90d LI |
1263 | err = 0; |
1264 | clnt = fid->clnt; | |
1265 | wst->size = p9_client_statsize(wst, clnt->dotu); | |
51a87c55 | 1266 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1267 | P9_DPRINTK(P9_DEBUG_9P, |
1268 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1269 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1270 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1271 | " uid=%d gid=%d n_muid=%d\n", | |
1272 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1273 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1274 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1275 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1276 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1277 | |
9d6939da | 1278 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1279 | if (IS_ERR(req)) { |
1280 | err = PTR_ERR(req); | |
1281 | goto error; | |
bd238fb4 LI |
1282 | } |
1283 | ||
51a87c55 | 1284 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1285 | |
51a87c55 EVH |
1286 | p9_free_req(clnt, req); |
1287 | error: | |
bd238fb4 LI |
1288 | return err; |
1289 | } | |
1290 | EXPORT_SYMBOL(p9_client_wstat); |