Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
bd238fb4 LI |
33 | #include <linux/sched.h> |
34 | #include <linux/uaccess.h> | |
35 | #include <net/9p/9p.h> | |
fb0466c3 | 36 | #include <linux/parser.h> |
bd238fb4 | 37 | #include <net/9p/client.h> |
8b81ef58 | 38 | #include <net/9p/transport.h> |
51a87c55 | 39 | #include "protocol.h" |
bd238fb4 | 40 | |
8a0dc95f EVH |
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, | |
0fb80abd | 50 | Opt_version, |
8a0dc95f EVH |
51 | Opt_err, |
52 | }; | |
53 | ||
a447c093 | 54 | static const match_table_t tokens = { |
8a0dc95f EVH |
55 | {Opt_msize, "msize=%u"}, |
56 | {Opt_legacy, "noextend"}, | |
57 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 58 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
59 | {Opt_err, NULL}, |
60 | }; | |
61 | ||
342fee1d SK |
62 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
63 | { | |
45bc21ed | 64 | return (clnt->proto_version == p9_proto_2000L); |
342fee1d SK |
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 | ||
0fb80abd SK |
74 | /* Interpret mount option for protocol version */ |
75 | static unsigned char get_protocol_version(const substring_t *name) | |
76 | { | |
77 | unsigned char version = -EINVAL; | |
78 | if (!strncmp("9p2000", name->from, name->to-name->from)) { | |
79 | version = p9_proto_legacy; | |
80 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); | |
81 | } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) { | |
82 | version = p9_proto_2000u; | |
83 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); | |
45bc21ed SK |
84 | } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) { |
85 | version = p9_proto_2000L; | |
86 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); | |
0fb80abd SK |
87 | } else { |
88 | P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ", | |
89 | name->from); | |
90 | } | |
91 | return version; | |
92 | } | |
93 | ||
51a87c55 EVH |
94 | static struct p9_req_t * |
95 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
91b8534f | 96 | |
8a0dc95f | 97 | /** |
0e15597e AK |
98 | * parse_options - parse mount options into client structure |
99 | * @opts: options string passed from mount | |
100 | * @clnt: existing v9fs client information | |
8a0dc95f | 101 | * |
bb8ffdfc | 102 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
103 | */ |
104 | ||
bb8ffdfc | 105 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 106 | { |
d8c8a9e3 | 107 | char *options, *tmp_options; |
8a0dc95f EVH |
108 | char *p; |
109 | substring_t args[MAX_OPT_ARGS]; | |
110 | int option; | |
bb8ffdfc | 111 | int ret = 0; |
8a0dc95f | 112 | |
342fee1d | 113 | clnt->proto_version = p9_proto_2000u; |
8a0dc95f EVH |
114 | clnt->msize = 8192; |
115 | ||
bb8ffdfc EVH |
116 | if (!opts) |
117 | return 0; | |
118 | ||
d8c8a9e3 EVH |
119 | tmp_options = kstrdup(opts, GFP_KERNEL); |
120 | if (!tmp_options) { | |
bb8ffdfc EVH |
121 | P9_DPRINTK(P9_DEBUG_ERROR, |
122 | "failed to allocate copy of option string\n"); | |
123 | return -ENOMEM; | |
124 | } | |
d8c8a9e3 | 125 | options = tmp_options; |
8a0dc95f EVH |
126 | |
127 | while ((p = strsep(&options, ",")) != NULL) { | |
128 | int token; | |
129 | if (!*p) | |
130 | continue; | |
131 | token = match_token(p, tokens, args); | |
132 | if (token < Opt_trans) { | |
bb8ffdfc EVH |
133 | int r = match_int(&args[0], &option); |
134 | if (r < 0) { | |
8a0dc95f EVH |
135 | P9_DPRINTK(P9_DEBUG_ERROR, |
136 | "integer field, but no integer?\n"); | |
bb8ffdfc | 137 | ret = r; |
8a0dc95f EVH |
138 | continue; |
139 | } | |
140 | } | |
141 | switch (token) { | |
142 | case Opt_msize: | |
143 | clnt->msize = option; | |
144 | break; | |
145 | case Opt_trans: | |
72029fe8 | 146 | clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); |
349d3bb8 EVH |
147 | if(clnt->trans_mod == NULL) { |
148 | P9_DPRINTK(P9_DEBUG_ERROR, | |
149 | "Could not find request transport: %s\n", | |
150 | (char *) &args[0]); | |
151 | ret = -EINVAL; | |
152 | goto free_and_return; | |
153 | } | |
8a0dc95f EVH |
154 | break; |
155 | case Opt_legacy: | |
342fee1d | 156 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 157 | break; |
0fb80abd SK |
158 | case Opt_version: |
159 | ret = get_protocol_version(&args[0]); | |
160 | if (ret == -EINVAL) | |
161 | goto free_and_return; | |
162 | clnt->proto_version = ret; | |
163 | break; | |
8a0dc95f EVH |
164 | default: |
165 | continue; | |
166 | } | |
167 | } | |
72029fe8 | 168 | |
349d3bb8 | 169 | free_and_return: |
d8c8a9e3 | 170 | kfree(tmp_options); |
bb8ffdfc | 171 | return ret; |
8a0dc95f EVH |
172 | } |
173 | ||
fea511a6 EVH |
174 | /** |
175 | * p9_tag_alloc - lookup/allocate a request by tag | |
176 | * @c: client session to lookup tag within | |
177 | * @tag: numeric id for transaction | |
178 | * | |
179 | * this is a simple array lookup, but will grow the | |
180 | * request_slots as necessary to accomodate transaction | |
181 | * ids which did not previously have a slot. | |
182 | * | |
183 | * this code relies on the client spinlock to manage locks, its | |
184 | * possible we should switch to something else, but I'd rather | |
185 | * stick with something low-overhead for the common case. | |
186 | * | |
187 | */ | |
188 | ||
51a87c55 | 189 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) |
fea511a6 EVH |
190 | { |
191 | unsigned long flags; | |
192 | int row, col; | |
51a87c55 | 193 | struct p9_req_t *req; |
fea511a6 EVH |
194 | |
195 | /* This looks up the original request by tag so we know which | |
196 | * buffer to read the data into */ | |
197 | tag++; | |
198 | ||
199 | if (tag >= c->max_tag) { | |
200 | spin_lock_irqsave(&c->lock, flags); | |
201 | /* check again since original check was outside of lock */ | |
202 | while (tag >= c->max_tag) { | |
203 | row = (tag / P9_ROW_MAXTAG); | |
204 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
205 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
206 | ||
207 | if (!c->reqs[row]) { | |
208 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
e45c5405 | 209 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 210 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
211 | } |
212 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
213 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 214 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
215 | } |
216 | c->max_tag += P9_ROW_MAXTAG; | |
217 | } | |
218 | spin_unlock_irqrestore(&c->lock, flags); | |
219 | } | |
220 | row = tag / P9_ROW_MAXTAG; | |
221 | col = tag % P9_ROW_MAXTAG; | |
222 | ||
51a87c55 EVH |
223 | req = &c->reqs[row][col]; |
224 | if (!req->tc) { | |
225 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); | |
226 | if (!req->wq) { | |
227 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
228 | return ERR_PTR(-ENOMEM); | |
229 | } | |
230 | init_waitqueue_head(req->wq); | |
231 | req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
232 | GFP_KERNEL); | |
233 | req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
234 | GFP_KERNEL); | |
235 | if ((!req->tc) || (!req->rc)) { | |
236 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
237 | kfree(req->tc); | |
238 | kfree(req->rc); | |
45abdf1c TT |
239 | kfree(req->wq); |
240 | req->tc = req->rc = NULL; | |
241 | req->wq = NULL; | |
51a87c55 EVH |
242 | return ERR_PTR(-ENOMEM); |
243 | } | |
244 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); | |
245 | req->tc->capacity = c->msize; | |
246 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); | |
247 | req->rc->capacity = c->msize; | |
248 | } | |
249 | ||
250 | p9pdu_reset(req->tc); | |
251 | p9pdu_reset(req->rc); | |
252 | ||
51a87c55 EVH |
253 | req->tc->tag = tag-1; |
254 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
255 | |
256 | return &c->reqs[row][col]; | |
257 | } | |
fea511a6 EVH |
258 | |
259 | /** | |
260 | * p9_tag_lookup - lookup a request by tag | |
261 | * @c: client session to lookup tag within | |
262 | * @tag: numeric id for transaction | |
263 | * | |
264 | */ | |
265 | ||
266 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
267 | { | |
268 | int row, col; | |
269 | ||
270 | /* This looks up the original request by tag so we know which | |
271 | * buffer to read the data into */ | |
272 | tag++; | |
273 | ||
274 | BUG_ON(tag >= c->max_tag); | |
275 | ||
276 | row = tag / P9_ROW_MAXTAG; | |
277 | col = tag % P9_ROW_MAXTAG; | |
278 | ||
279 | return &c->reqs[row][col]; | |
280 | } | |
281 | EXPORT_SYMBOL(p9_tag_lookup); | |
282 | ||
283 | /** | |
284 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 285 | * @c: v9fs client struct |
fea511a6 EVH |
286 | * |
287 | * This initializes the tags structure for each client instance. | |
288 | * | |
289 | */ | |
290 | ||
291 | static int p9_tag_init(struct p9_client *c) | |
292 | { | |
293 | int err = 0; | |
294 | ||
295 | c->tagpool = p9_idpool_create(); | |
296 | if (IS_ERR(c->tagpool)) { | |
297 | err = PTR_ERR(c->tagpool); | |
298 | c->tagpool = NULL; | |
299 | goto error; | |
300 | } | |
301 | ||
302 | p9_idpool_get(c->tagpool); /* reserve tag 0 */ | |
303 | ||
304 | c->max_tag = 0; | |
305 | error: | |
306 | return err; | |
307 | } | |
308 | ||
309 | /** | |
310 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 311 | * @c: v9fs client struct |
fea511a6 EVH |
312 | * |
313 | * This frees resources associated with the tags structure | |
314 | * | |
315 | */ | |
316 | static void p9_tag_cleanup(struct p9_client *c) | |
317 | { | |
318 | int row, col; | |
319 | ||
320 | /* check to insure all requests are idle */ | |
321 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
322 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
323 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
324 | P9_DPRINTK(P9_DEBUG_MUX, | |
325 | "Attempting to cleanup non-free tag %d,%d\n", | |
326 | row, col); | |
327 | /* TODO: delay execution of cleanup */ | |
328 | return; | |
329 | } | |
330 | } | |
331 | } | |
332 | ||
333 | if (c->tagpool) | |
334 | p9_idpool_destroy(c->tagpool); | |
335 | ||
336 | /* free requests associated with tags */ | |
337 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 338 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 339 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
340 | kfree(c->reqs[row][col].tc); |
341 | kfree(c->reqs[row][col].rc); | |
342 | } | |
fea511a6 EVH |
343 | kfree(c->reqs[row]); |
344 | } | |
345 | c->max_tag = 0; | |
346 | } | |
347 | ||
673d62cd EVH |
348 | /** |
349 | * p9_free_req - free a request and clean-up as necessary | |
350 | * c: client state | |
351 | * r: request to release | |
352 | * | |
353 | */ | |
354 | ||
51a87c55 | 355 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 356 | { |
51a87c55 EVH |
357 | int tag = r->tc->tag; |
358 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
359 | ||
673d62cd | 360 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
361 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
362 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
363 | } |
364 | ||
91b8534f EVH |
365 | /** |
366 | * p9_client_cb - call back from transport to client | |
367 | * c: client state | |
368 | * req: request received | |
369 | * | |
370 | */ | |
371 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
372 | { | |
51a87c55 | 373 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 LI |
374 | wake_up(req->wq); |
375 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
91b8534f EVH |
376 | } |
377 | EXPORT_SYMBOL(p9_client_cb); | |
378 | ||
51a87c55 EVH |
379 | /** |
380 | * p9_parse_header - parse header arguments out of a packet | |
381 | * @pdu: packet to parse | |
382 | * @size: size of packet | |
383 | * @type: type of request | |
384 | * @tag: tag of packet | |
385 | * @rewind: set if we need to rewind offset afterwards | |
386 | */ | |
387 | ||
388 | int | |
389 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
390 | int rewind) | |
391 | { | |
392 | int8_t r_type; | |
393 | int16_t r_tag; | |
394 | int32_t r_size; | |
395 | int offset = pdu->offset; | |
396 | int err; | |
397 | ||
398 | pdu->offset = 0; | |
399 | if (pdu->size == 0) | |
400 | pdu->size = 7; | |
401 | ||
402 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
403 | if (err) | |
404 | goto rewind_and_exit; | |
405 | ||
406 | pdu->size = r_size; | |
407 | pdu->id = r_type; | |
408 | pdu->tag = r_tag; | |
409 | ||
e7f4b8f1 EVH |
410 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
411 | pdu->id, pdu->tag); | |
51a87c55 EVH |
412 | |
413 | if (type) | |
414 | *type = r_type; | |
415 | if (tag) | |
416 | *tag = r_tag; | |
417 | if (size) | |
418 | *size = r_size; | |
419 | ||
420 | ||
421 | rewind_and_exit: | |
422 | if (rewind) | |
423 | pdu->offset = offset; | |
424 | return err; | |
425 | } | |
426 | EXPORT_SYMBOL(p9_parse_header); | |
427 | ||
428 | /** | |
429 | * p9_check_errors - check 9p packet for error return and process it | |
430 | * @c: current client instance | |
431 | * @req: request to parse and check for error conditions | |
432 | * | |
433 | * returns error code if one is discovered, otherwise returns 0 | |
434 | * | |
435 | * this will have to be more complicated if we have multiple | |
436 | * error packet types | |
437 | */ | |
438 | ||
439 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
440 | { | |
441 | int8_t type; | |
442 | int err; | |
443 | ||
444 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
445 | if (err) { | |
446 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
447 | return err; | |
448 | } | |
449 | ||
450 | if (type == P9_RERROR) { | |
451 | int ecode; | |
452 | char *ename; | |
453 | ||
342fee1d SK |
454 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
455 | &ename, &ecode); | |
51a87c55 EVH |
456 | if (err) { |
457 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", | |
458 | err); | |
459 | return err; | |
460 | } | |
461 | ||
342fee1d | 462 | if (p9_is_proto_dotu(c)) |
51a87c55 EVH |
463 | err = -ecode; |
464 | ||
0aad37ef | 465 | if (!err || !IS_ERR_VALUE(err)) |
51a87c55 EVH |
466 | err = p9_errstr2errno(ename, strlen(ename)); |
467 | ||
51a87c55 EVH |
468 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); |
469 | ||
470 | kfree(ename); | |
471 | } else | |
472 | err = 0; | |
473 | ||
474 | return err; | |
475 | } | |
476 | ||
477 | /** | |
478 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
479 | * @c: client state |
480 | * @oldreq: request to cancel | |
51a87c55 EVH |
481 | * |
482 | * This sents a flush for a particular requests and links | |
483 | * the flush request to the original request. The current | |
484 | * code only supports a single flush request although the protocol | |
485 | * allows for multiple flush requests to be sent for a single request. | |
486 | * | |
487 | */ | |
488 | ||
489 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
490 | { | |
491 | struct p9_req_t *req; | |
492 | int16_t oldtag; | |
493 | int err; | |
494 | ||
495 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
496 | if (err) | |
497 | return err; | |
498 | ||
499 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
500 | ||
501 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
502 | if (IS_ERR(req)) | |
503 | return PTR_ERR(req); | |
504 | ||
51a87c55 | 505 | |
1bab88b2 LI |
506 | /* if we haven't received a response for oldreq, |
507 | remove it from the list. */ | |
508 | spin_lock(&c->lock); | |
509 | if (oldreq->status == REQ_STATUS_FLSH) | |
510 | list_del(&oldreq->req_list); | |
511 | spin_unlock(&c->lock); | |
512 | ||
513 | p9_free_req(c, req); | |
51a87c55 EVH |
514 | return 0; |
515 | } | |
516 | ||
91b8534f EVH |
517 | /** |
518 | * p9_client_rpc - issue a request and wait for a response | |
519 | * @c: client session | |
51a87c55 EVH |
520 | * @type: type of request |
521 | * @fmt: protocol format string (see protocol.c) | |
91b8534f | 522 | * |
51a87c55 | 523 | * Returns request structure (which client must free using p9_free_req) |
91b8534f EVH |
524 | */ |
525 | ||
51a87c55 EVH |
526 | static struct p9_req_t * |
527 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
91b8534f | 528 | { |
51a87c55 EVH |
529 | va_list ap; |
530 | int tag, err; | |
91b8534f EVH |
531 | struct p9_req_t *req; |
532 | unsigned long flags; | |
533 | int sigpending; | |
91b8534f | 534 | |
51a87c55 | 535 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f EVH |
536 | |
537 | if (c->status != Connected) | |
51a87c55 | 538 | return ERR_PTR(-EIO); |
91b8534f EVH |
539 | |
540 | if (signal_pending(current)) { | |
541 | sigpending = 1; | |
542 | clear_thread_flag(TIF_SIGPENDING); | |
543 | } else | |
544 | sigpending = 0; | |
545 | ||
546 | tag = P9_NOTAG; | |
51a87c55 | 547 | if (type != P9_TVERSION) { |
91b8534f EVH |
548 | tag = p9_idpool_get(c->tagpool); |
549 | if (tag < 0) | |
51a87c55 | 550 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
551 | } |
552 | ||
553 | req = p9_tag_alloc(c, tag); | |
51a87c55 EVH |
554 | if (IS_ERR(req)) |
555 | return req; | |
91b8534f | 556 | |
51a87c55 EVH |
557 | /* marshall the data */ |
558 | p9pdu_prepare(req->tc, tag, type); | |
559 | va_start(ap, fmt); | |
342fee1d | 560 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
51a87c55 EVH |
561 | va_end(ap); |
562 | p9pdu_finalize(req->tc); | |
91b8534f EVH |
563 | |
564 | err = c->trans_mod->request(c, req); | |
565 | if (err < 0) { | |
566 | c->status = Disconnected; | |
567 | goto reterr; | |
568 | } | |
569 | ||
51a87c55 | 570 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
91b8534f EVH |
571 | err = wait_event_interruptible(*req->wq, |
572 | req->status >= REQ_STATUS_RCVD); | |
1bab88b2 LI |
573 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
574 | req->wq, tag, err); | |
91b8534f EVH |
575 | |
576 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 577 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 578 | err = req->t_err; |
91b8534f EVH |
579 | } |
580 | ||
1bab88b2 | 581 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
51a87c55 | 582 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 583 | sigpending = 1; |
91b8534f EVH |
584 | clear_thread_flag(TIF_SIGPENDING); |
585 | ||
1bab88b2 LI |
586 | if (c->trans_mod->cancel(c, req)) |
587 | p9_client_flush(c, req); | |
588 | ||
589 | /* if we received the response anyway, don't signal error */ | |
590 | if (req->status == REQ_STATUS_RCVD) | |
591 | err = 0; | |
91b8534f EVH |
592 | } |
593 | ||
594 | if (sigpending) { | |
595 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
596 | recalc_sigpending(); | |
597 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
598 | } | |
599 | ||
600 | if (err < 0) | |
601 | goto reterr; | |
602 | ||
51a87c55 EVH |
603 | err = p9_check_errors(c, req); |
604 | if (!err) { | |
605 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
606 | return req; | |
91b8534f EVH |
607 | } |
608 | ||
91b8534f | 609 | reterr: |
51a87c55 EVH |
610 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
611 | err); | |
91b8534f | 612 | p9_free_req(c, req); |
51a87c55 | 613 | return ERR_PTR(err); |
91b8534f EVH |
614 | } |
615 | ||
5503ac56 EVH |
616 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
617 | { | |
9f3e9bbe | 618 | int ret; |
5503ac56 | 619 | struct p9_fid *fid; |
cac23d65 | 620 | unsigned long flags; |
5503ac56 | 621 | |
51a87c55 | 622 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
623 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
624 | if (!fid) | |
625 | return ERR_PTR(-ENOMEM); | |
626 | ||
9f3e9bbe | 627 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 628 | if (ret < 0) { |
9f3e9bbe | 629 | ret = -ENOSPC; |
5503ac56 EVH |
630 | goto error; |
631 | } | |
9f3e9bbe | 632 | fid->fid = ret; |
5503ac56 EVH |
633 | |
634 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
635 | fid->mode = -1; | |
f8b9d53a | 636 | fid->uid = current_fsuid(); |
5503ac56 | 637 | fid->clnt = clnt; |
3e2796a9 | 638 | fid->rdir = NULL; |
cac23d65 | 639 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 640 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 641 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
642 | |
643 | return fid; | |
644 | ||
645 | error: | |
646 | kfree(fid); | |
9f3e9bbe | 647 | return ERR_PTR(ret); |
5503ac56 EVH |
648 | } |
649 | ||
650 | static void p9_fid_destroy(struct p9_fid *fid) | |
651 | { | |
652 | struct p9_client *clnt; | |
cac23d65 | 653 | unsigned long flags; |
5503ac56 | 654 | |
51a87c55 | 655 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
656 | clnt = fid->clnt; |
657 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 658 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 659 | list_del(&fid->flist); |
cac23d65 | 660 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 661 | kfree(fid->rdir); |
5503ac56 EVH |
662 | kfree(fid); |
663 | } | |
8a0dc95f | 664 | |
51a87c55 | 665 | int p9_client_version(struct p9_client *c) |
bd238fb4 | 666 | { |
6936bf60 | 667 | int err = 0; |
51a87c55 EVH |
668 | struct p9_req_t *req; |
669 | char *version; | |
670 | int msize; | |
bd238fb4 | 671 | |
342fee1d SK |
672 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
673 | c->msize, c->proto_version); | |
c5a7697d SK |
674 | |
675 | switch (c->proto_version) { | |
45bc21ed | 676 | case p9_proto_2000L: |
c5a7697d | 677 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 678 | c->msize, "9P2000.L"); |
c5a7697d SK |
679 | break; |
680 | case p9_proto_2000u: | |
681 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
682 | c->msize, "9P2000.u"); | |
683 | break; | |
684 | case p9_proto_legacy: | |
685 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
686 | c->msize, "9P2000"); | |
687 | break; | |
688 | default: | |
689 | return -EINVAL; | |
690 | break; | |
691 | } | |
692 | ||
51a87c55 EVH |
693 | if (IS_ERR(req)) |
694 | return PTR_ERR(req); | |
6936bf60 | 695 | |
342fee1d | 696 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 EVH |
697 | if (err) { |
698 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
e7f4b8f1 | 699 | p9pdu_dump(1, req->rc); |
6936bf60 | 700 | goto error; |
51a87c55 | 701 | } |
6936bf60 | 702 | |
51a87c55 | 703 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
704 | if (!strncmp(version, "9P2000.L", 8)) |
705 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 706 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
707 | c->proto_version = p9_proto_2000u; |
708 | else if (!strncmp(version, "9P2000", 6)) | |
709 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
710 | else { |
711 | err = -EREMOTEIO; | |
712 | goto error; | |
713 | } | |
714 | ||
51a87c55 EVH |
715 | if (msize < c->msize) |
716 | c->msize = msize; | |
6936bf60 EVH |
717 | |
718 | error: | |
51a87c55 EVH |
719 | kfree(version); |
720 | p9_free_req(c, req); | |
6936bf60 EVH |
721 | |
722 | return err; | |
723 | } | |
51a87c55 | 724 | EXPORT_SYMBOL(p9_client_version); |
6936bf60 EVH |
725 | |
726 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
727 | { | |
728 | int err; | |
729 | struct p9_client *clnt; | |
730 | ||
731 | err = 0; | |
bd238fb4 LI |
732 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
733 | if (!clnt) | |
734 | return ERR_PTR(-ENOMEM); | |
735 | ||
72029fe8 | 736 | clnt->trans_mod = NULL; |
bb8ffdfc | 737 | clnt->trans = NULL; |
bd238fb4 | 738 | spin_lock_init(&clnt->lock); |
bd238fb4 | 739 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 740 | |
fea511a6 EVH |
741 | p9_tag_init(clnt); |
742 | ||
bb8ffdfc EVH |
743 | err = parse_opts(options, clnt); |
744 | if (err < 0) | |
8781ff94 | 745 | goto free_client; |
bb8ffdfc | 746 | |
a17d1720 AK |
747 | if (!clnt->trans_mod) |
748 | clnt->trans_mod = v9fs_get_default_trans(); | |
749 | ||
8a0dc95f EVH |
750 | if (clnt->trans_mod == NULL) { |
751 | err = -EPROTONOSUPPORT; | |
752 | P9_DPRINTK(P9_DEBUG_ERROR, | |
753 | "No transport defined or default transport\n"); | |
8781ff94 EVH |
754 | goto free_client; |
755 | } | |
756 | ||
757 | clnt->fidpool = p9_idpool_create(); | |
758 | if (IS_ERR(clnt->fidpool)) { | |
759 | err = PTR_ERR(clnt->fidpool); | |
760 | clnt->fidpool = NULL; | |
761 | goto put_trans; | |
8a0dc95f EVH |
762 | } |
763 | ||
342fee1d SK |
764 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
765 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 766 | |
8b81ef58 EVH |
767 | err = clnt->trans_mod->create(clnt, dev_name, options); |
768 | if (err) | |
8781ff94 | 769 | goto destroy_fidpool; |
bd238fb4 | 770 | |
8a0dc95f EVH |
771 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
772 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
773 | ||
6936bf60 | 774 | err = p9_client_version(clnt); |
bd238fb4 | 775 | if (err) |
8781ff94 | 776 | goto close_trans; |
bd238fb4 | 777 | |
bd238fb4 LI |
778 | return clnt; |
779 | ||
8781ff94 EVH |
780 | close_trans: |
781 | clnt->trans_mod->close(clnt); | |
782 | destroy_fidpool: | |
783 | p9_idpool_destroy(clnt->fidpool); | |
784 | put_trans: | |
785 | v9fs_put_trans(clnt->trans_mod); | |
786 | free_client: | |
787 | kfree(clnt); | |
bd238fb4 LI |
788 | return ERR_PTR(err); |
789 | } | |
790 | EXPORT_SYMBOL(p9_client_create); | |
791 | ||
792 | void p9_client_destroy(struct p9_client *clnt) | |
793 | { | |
794 | struct p9_fid *fid, *fidptr; | |
795 | ||
51a87c55 | 796 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 797 | |
8b81ef58 EVH |
798 | if (clnt->trans_mod) |
799 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 800 | |
72029fe8 TH |
801 | v9fs_put_trans(clnt->trans_mod); |
802 | ||
bd238fb4 LI |
803 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) |
804 | p9_fid_destroy(fid); | |
805 | ||
0af8887e EVH |
806 | if (clnt->fidpool) |
807 | p9_idpool_destroy(clnt->fidpool); | |
808 | ||
fea511a6 EVH |
809 | p9_tag_cleanup(clnt); |
810 | ||
bd238fb4 LI |
811 | kfree(clnt); |
812 | } | |
813 | EXPORT_SYMBOL(p9_client_destroy); | |
814 | ||
815 | void p9_client_disconnect(struct p9_client *clnt) | |
816 | { | |
817 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 818 | clnt->status = Disconnected; |
bd238fb4 LI |
819 | } |
820 | EXPORT_SYMBOL(p9_client_disconnect); | |
821 | ||
822 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, | |
ba17674f | 823 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
824 | { |
825 | int err; | |
51a87c55 | 826 | struct p9_req_t *req; |
bd238fb4 | 827 | struct p9_fid *fid; |
51a87c55 | 828 | struct p9_qid qid; |
bd238fb4 | 829 | |
51a87c55 EVH |
830 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
831 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 832 | err = 0; |
bd238fb4 LI |
833 | |
834 | fid = p9_fid_create(clnt); | |
835 | if (IS_ERR(fid)) { | |
836 | err = PTR_ERR(fid); | |
837 | fid = NULL; | |
838 | goto error; | |
839 | } | |
840 | ||
51a87c55 EVH |
841 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
842 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
843 | if (IS_ERR(req)) { | |
844 | err = PTR_ERR(req); | |
bd238fb4 LI |
845 | goto error; |
846 | } | |
847 | ||
342fee1d | 848 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 849 | if (err) { |
e7f4b8f1 | 850 | p9pdu_dump(1, req->rc); |
51a87c55 | 851 | p9_free_req(clnt, req); |
bd238fb4 | 852 | goto error; |
51a87c55 | 853 | } |
bd238fb4 | 854 | |
51a87c55 | 855 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
856 | qid.type, |
857 | (unsigned long long)qid.path, | |
858 | qid.version); | |
51a87c55 EVH |
859 | |
860 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
861 | ||
862 | p9_free_req(clnt, req); | |
bd238fb4 LI |
863 | return fid; |
864 | ||
865 | error: | |
bd238fb4 LI |
866 | if (fid) |
867 | p9_fid_destroy(fid); | |
868 | return ERR_PTR(err); | |
869 | } | |
870 | EXPORT_SYMBOL(p9_client_attach); | |
871 | ||
51a87c55 EVH |
872 | struct p9_fid * |
873 | p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) | |
bd238fb4 LI |
874 | { |
875 | int err; | |
51a87c55 EVH |
876 | struct p9_req_t *req; |
877 | struct p9_qid qid; | |
878 | struct p9_fid *afid; | |
bd238fb4 | 879 | |
51a87c55 | 880 | P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); |
bd238fb4 | 881 | err = 0; |
bd238fb4 | 882 | |
51a87c55 EVH |
883 | afid = p9_fid_create(clnt); |
884 | if (IS_ERR(afid)) { | |
885 | err = PTR_ERR(afid); | |
886 | afid = NULL; | |
bd238fb4 LI |
887 | goto error; |
888 | } | |
889 | ||
51a87c55 EVH |
890 | req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", |
891 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
892 | if (IS_ERR(req)) { | |
893 | err = PTR_ERR(req); | |
bd238fb4 LI |
894 | goto error; |
895 | } | |
896 | ||
342fee1d | 897 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 898 | if (err) { |
e7f4b8f1 | 899 | p9pdu_dump(1, req->rc); |
51a87c55 | 900 | p9_free_req(clnt, req); |
bd238fb4 | 901 | goto error; |
51a87c55 | 902 | } |
bd238fb4 | 903 | |
51a87c55 | 904 | P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", |
b0d5fdef RD |
905 | qid.type, |
906 | (unsigned long long)qid.path, | |
907 | qid.version); | |
51a87c55 EVH |
908 | |
909 | memmove(&afid->qid, &qid, sizeof(struct p9_qid)); | |
910 | p9_free_req(clnt, req); | |
911 | return afid; | |
bd238fb4 LI |
912 | |
913 | error: | |
51a87c55 EVH |
914 | if (afid) |
915 | p9_fid_destroy(afid); | |
bd238fb4 LI |
916 | return ERR_PTR(err); |
917 | } | |
918 | EXPORT_SYMBOL(p9_client_auth); | |
919 | ||
920 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, | |
921 | int clone) | |
922 | { | |
923 | int err; | |
bd238fb4 LI |
924 | struct p9_client *clnt; |
925 | struct p9_fid *fid; | |
51a87c55 EVH |
926 | struct p9_qid *wqids; |
927 | struct p9_req_t *req; | |
928 | int16_t nwqids, count; | |
bd238fb4 | 929 | |
bd238fb4 | 930 | err = 0; |
bd238fb4 LI |
931 | clnt = oldfid->clnt; |
932 | if (clone) { | |
933 | fid = p9_fid_create(clnt); | |
934 | if (IS_ERR(fid)) { | |
935 | err = PTR_ERR(fid); | |
936 | fid = NULL; | |
937 | goto error; | |
938 | } | |
939 | ||
940 | fid->uid = oldfid->uid; | |
941 | } else | |
942 | fid = oldfid; | |
943 | ||
51a87c55 EVH |
944 | |
945 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
946 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
947 | ||
948 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
949 | nwname, wnames); | |
950 | if (IS_ERR(req)) { | |
951 | err = PTR_ERR(req); | |
bd238fb4 LI |
952 | goto error; |
953 | } | |
954 | ||
342fee1d | 955 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 EVH |
956 | if (err) { |
957 | p9pdu_dump(1, req->rc); | |
958 | p9_free_req(clnt, req); | |
51a87c55 | 959 | goto clunk_fid; |
e7f4b8f1 EVH |
960 | } |
961 | p9_free_req(clnt, req); | |
bd238fb4 | 962 | |
51a87c55 EVH |
963 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
964 | ||
965 | if (nwqids != nwname) { | |
bd238fb4 LI |
966 | err = -ENOENT; |
967 | goto clunk_fid; | |
968 | } | |
969 | ||
51a87c55 EVH |
970 | for (count = 0; count < nwqids; count++) |
971 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
972 | count, wqids[count].type, |
973 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
974 | wqids[count].version); |
975 | ||
bd238fb4 | 976 | if (nwname) |
51a87c55 | 977 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
978 | else |
979 | fid->qid = oldfid->qid; | |
980 | ||
bd238fb4 LI |
981 | return fid; |
982 | ||
983 | clunk_fid: | |
51a87c55 EVH |
984 | p9_client_clunk(fid); |
985 | fid = NULL; | |
bd238fb4 LI |
986 | |
987 | error: | |
bd238fb4 LI |
988 | if (fid && (fid != oldfid)) |
989 | p9_fid_destroy(fid); | |
990 | ||
991 | return ERR_PTR(err); | |
992 | } | |
993 | EXPORT_SYMBOL(p9_client_walk); | |
994 | ||
995 | int p9_client_open(struct p9_fid *fid, int mode) | |
996 | { | |
997 | int err; | |
bd238fb4 | 998 | struct p9_client *clnt; |
51a87c55 EVH |
999 | struct p9_req_t *req; |
1000 | struct p9_qid qid; | |
1001 | int iounit; | |
bd238fb4 | 1002 | |
51a87c55 | 1003 | P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); |
bd238fb4 | 1004 | err = 0; |
bd238fb4 LI |
1005 | clnt = fid->clnt; |
1006 | ||
1007 | if (fid->mode != -1) | |
1008 | return -EINVAL; | |
1009 | ||
51a87c55 EVH |
1010 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
1011 | if (IS_ERR(req)) { | |
1012 | err = PTR_ERR(req); | |
1013 | goto error; | |
bd238fb4 LI |
1014 | } |
1015 | ||
342fee1d | 1016 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1017 | if (err) { |
1018 | p9pdu_dump(1, req->rc); | |
1019 | goto free_and_error; | |
1020 | } | |
51a87c55 EVH |
1021 | |
1022 | P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1023 | qid.type, |
1024 | (unsigned long long)qid.path, | |
1025 | qid.version, iounit); | |
bd238fb4 LI |
1026 | |
1027 | fid->mode = mode; | |
51a87c55 | 1028 | fid->iounit = iounit; |
bd238fb4 | 1029 | |
e7f4b8f1 EVH |
1030 | free_and_error: |
1031 | p9_free_req(clnt, req); | |
51a87c55 | 1032 | error: |
bd238fb4 LI |
1033 | return err; |
1034 | } | |
1035 | EXPORT_SYMBOL(p9_client_open); | |
1036 | ||
1037 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, | |
1038 | char *extension) | |
1039 | { | |
1040 | int err; | |
bd238fb4 | 1041 | struct p9_client *clnt; |
51a87c55 EVH |
1042 | struct p9_req_t *req; |
1043 | struct p9_qid qid; | |
1044 | int iounit; | |
bd238fb4 | 1045 | |
51a87c55 EVH |
1046 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1047 | fid->fid, name, perm, mode); | |
bd238fb4 | 1048 | err = 0; |
bd238fb4 LI |
1049 | clnt = fid->clnt; |
1050 | ||
1051 | if (fid->mode != -1) | |
1052 | return -EINVAL; | |
1053 | ||
51a87c55 EVH |
1054 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1055 | mode, extension); | |
1056 | if (IS_ERR(req)) { | |
1057 | err = PTR_ERR(req); | |
1058 | goto error; | |
bd238fb4 LI |
1059 | } |
1060 | ||
342fee1d | 1061 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1062 | if (err) { |
1063 | p9pdu_dump(1, req->rc); | |
1064 | goto free_and_error; | |
1065 | } | |
51a87c55 EVH |
1066 | |
1067 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1068 | qid.type, |
1069 | (unsigned long long)qid.path, | |
1070 | qid.version, iounit); | |
bd238fb4 LI |
1071 | |
1072 | fid->mode = mode; | |
51a87c55 | 1073 | fid->iounit = iounit; |
bd238fb4 | 1074 | |
e7f4b8f1 EVH |
1075 | free_and_error: |
1076 | p9_free_req(clnt, req); | |
51a87c55 | 1077 | error: |
bd238fb4 LI |
1078 | return err; |
1079 | } | |
1080 | EXPORT_SYMBOL(p9_client_fcreate); | |
1081 | ||
1082 | int p9_client_clunk(struct p9_fid *fid) | |
1083 | { | |
1084 | int err; | |
bd238fb4 | 1085 | struct p9_client *clnt; |
51a87c55 | 1086 | struct p9_req_t *req; |
bd238fb4 | 1087 | |
51a87c55 | 1088 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1089 | err = 0; |
bd238fb4 LI |
1090 | clnt = fid->clnt; |
1091 | ||
51a87c55 EVH |
1092 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1093 | if (IS_ERR(req)) { | |
1094 | err = PTR_ERR(req); | |
1095 | goto error; | |
bd238fb4 LI |
1096 | } |
1097 | ||
51a87c55 | 1098 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1099 | |
51a87c55 | 1100 | p9_free_req(clnt, req); |
bd238fb4 LI |
1101 | p9_fid_destroy(fid); |
1102 | ||
51a87c55 | 1103 | error: |
bd238fb4 LI |
1104 | return err; |
1105 | } | |
1106 | EXPORT_SYMBOL(p9_client_clunk); | |
1107 | ||
1108 | int p9_client_remove(struct p9_fid *fid) | |
1109 | { | |
1110 | int err; | |
bd238fb4 | 1111 | struct p9_client *clnt; |
51a87c55 | 1112 | struct p9_req_t *req; |
bd238fb4 | 1113 | |
51a87c55 | 1114 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1115 | err = 0; |
bd238fb4 LI |
1116 | clnt = fid->clnt; |
1117 | ||
51a87c55 EVH |
1118 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1119 | if (IS_ERR(req)) { | |
1120 | err = PTR_ERR(req); | |
1121 | goto error; | |
bd238fb4 LI |
1122 | } |
1123 | ||
51a87c55 | 1124 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1125 | |
51a87c55 | 1126 | p9_free_req(clnt, req); |
bd238fb4 LI |
1127 | p9_fid_destroy(fid); |
1128 | ||
51a87c55 | 1129 | error: |
bd238fb4 LI |
1130 | return err; |
1131 | } | |
1132 | EXPORT_SYMBOL(p9_client_remove); | |
1133 | ||
0fc9655e EVH |
1134 | int |
1135 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1136 | u32 count) | |
bd238fb4 | 1137 | { |
51a87c55 | 1138 | int err, rsize, total; |
bd238fb4 | 1139 | struct p9_client *clnt; |
51a87c55 EVH |
1140 | struct p9_req_t *req; |
1141 | char *dataptr; | |
bd238fb4 | 1142 | |
51a87c55 | 1143 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
bd238fb4 LI |
1144 | (long long unsigned) offset, count); |
1145 | err = 0; | |
bd238fb4 LI |
1146 | clnt = fid->clnt; |
1147 | total = 0; | |
1148 | ||
1149 | rsize = fid->iounit; | |
1150 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1151 | rsize = clnt->msize - P9_IOHDRSZ; | |
1152 | ||
51a87c55 EVH |
1153 | if (count < rsize) |
1154 | rsize = count; | |
bd238fb4 | 1155 | |
51a87c55 EVH |
1156 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1157 | if (IS_ERR(req)) { | |
1158 | err = PTR_ERR(req); | |
1159 | goto error; | |
1160 | } | |
bd238fb4 | 1161 | |
342fee1d | 1162 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 EVH |
1163 | if (err) { |
1164 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1165 | goto free_and_error; |
e7f4b8f1 | 1166 | } |
bd238fb4 | 1167 | |
51a87c55 | 1168 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1169 | |
51a87c55 EVH |
1170 | if (data) { |
1171 | memmove(data, dataptr, count); | |
51a87c55 | 1172 | } |
bd238fb4 | 1173 | |
51a87c55 EVH |
1174 | if (udata) { |
1175 | err = copy_to_user(udata, dataptr, count); | |
1176 | if (err) { | |
1177 | err = -EFAULT; | |
1178 | goto free_and_error; | |
bd238fb4 | 1179 | } |
51a87c55 | 1180 | } |
bd238fb4 | 1181 | |
51a87c55 EVH |
1182 | p9_free_req(clnt, req); |
1183 | return count; | |
bd238fb4 | 1184 | |
51a87c55 EVH |
1185 | free_and_error: |
1186 | p9_free_req(clnt, req); | |
bd238fb4 | 1187 | error: |
bd238fb4 LI |
1188 | return err; |
1189 | } | |
0fc9655e | 1190 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1191 | |
1192 | int | |
0fc9655e EVH |
1193 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1194 | u64 offset, u32 count) | |
bd238fb4 | 1195 | { |
51a87c55 | 1196 | int err, rsize, total; |
bd238fb4 | 1197 | struct p9_client *clnt; |
51a87c55 | 1198 | struct p9_req_t *req; |
bd238fb4 | 1199 | |
51a87c55 EVH |
1200 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1201 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1202 | err = 0; |
bd238fb4 LI |
1203 | clnt = fid->clnt; |
1204 | total = 0; | |
1205 | ||
1206 | rsize = fid->iounit; | |
1207 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1208 | rsize = clnt->msize - P9_IOHDRSZ; | |
1209 | ||
51a87c55 EVH |
1210 | if (count < rsize) |
1211 | rsize = count; | |
1212 | if (data) | |
1213 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1214 | rsize, data); | |
1215 | else | |
1216 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1217 | rsize, udata); | |
1218 | if (IS_ERR(req)) { | |
1219 | err = PTR_ERR(req); | |
1220 | goto error; | |
1221 | } | |
0fc9655e | 1222 | |
342fee1d | 1223 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 EVH |
1224 | if (err) { |
1225 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1226 | goto free_and_error; |
e7f4b8f1 EVH |
1227 | } |
1228 | ||
51a87c55 | 1229 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1230 | |
51a87c55 EVH |
1231 | p9_free_req(clnt, req); |
1232 | return count; | |
bd238fb4 | 1233 | |
51a87c55 EVH |
1234 | free_and_error: |
1235 | p9_free_req(clnt, req); | |
bd238fb4 | 1236 | error: |
bd238fb4 LI |
1237 | return err; |
1238 | } | |
0fc9655e | 1239 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1240 | |
51a87c55 | 1241 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1242 | { |
51a87c55 EVH |
1243 | int err; |
1244 | struct p9_client *clnt; | |
1245 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1246 | struct p9_req_t *req; | |
1247 | u16 ignored; | |
5503ac56 | 1248 | |
51a87c55 | 1249 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1250 | |
5503ac56 EVH |
1251 | if (!ret) |
1252 | return ERR_PTR(-ENOMEM); | |
1253 | ||
bd238fb4 | 1254 | err = 0; |
bd238fb4 LI |
1255 | clnt = fid->clnt; |
1256 | ||
51a87c55 EVH |
1257 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1258 | if (IS_ERR(req)) { | |
1259 | err = PTR_ERR(req); | |
bd238fb4 LI |
1260 | goto error; |
1261 | } | |
1262 | ||
342fee1d | 1263 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1264 | if (err) { |
e7f4b8f1 | 1265 | p9pdu_dump(1, req->rc); |
eedfe1c4 AK |
1266 | p9_free_req(clnt, req); |
1267 | goto error; | |
e7f4b8f1 | 1268 | } |
bd238fb4 | 1269 | |
51a87c55 | 1270 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1271 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1272 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1273 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1274 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1275 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1276 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1277 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1278 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1279 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1280 | |
742b11a7 LI |
1281 | p9_free_req(clnt, req); |
1282 | return ret; | |
1283 | ||
bd238fb4 | 1284 | error: |
742b11a7 LI |
1285 | kfree(ret); |
1286 | return ERR_PTR(err); | |
bd238fb4 LI |
1287 | } |
1288 | EXPORT_SYMBOL(p9_client_stat); | |
1289 | ||
342fee1d | 1290 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1291 | { |
1292 | int ret; | |
1293 | ||
9d6939da | 1294 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1295 | /* size[2] type[2] dev[4] qid[13] */ |
1296 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1297 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1298 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1299 | |
1300 | if (wst->name) | |
1301 | ret += strlen(wst->name); | |
1302 | if (wst->uid) | |
1303 | ret += strlen(wst->uid); | |
1304 | if (wst->gid) | |
1305 | ret += strlen(wst->gid); | |
1306 | if (wst->muid) | |
1307 | ret += strlen(wst->muid); | |
1308 | ||
342fee1d | 1309 | if (proto_version == p9_proto_2000u) { |
453ed90d LI |
1310 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1311 | if (wst->extension) | |
1312 | ret += strlen(wst->extension); | |
1313 | } | |
1314 | ||
1315 | return ret; | |
1316 | } | |
1317 | ||
bd238fb4 LI |
1318 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1319 | { | |
1320 | int err; | |
51a87c55 | 1321 | struct p9_req_t *req; |
bd238fb4 LI |
1322 | struct p9_client *clnt; |
1323 | ||
453ed90d LI |
1324 | err = 0; |
1325 | clnt = fid->clnt; | |
342fee1d | 1326 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
51a87c55 | 1327 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1328 | P9_DPRINTK(P9_DEBUG_9P, |
1329 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1330 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1331 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1332 | " uid=%d gid=%d n_muid=%d\n", | |
1333 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1334 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1335 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1336 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1337 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1338 | |
9d6939da | 1339 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1340 | if (IS_ERR(req)) { |
1341 | err = PTR_ERR(req); | |
1342 | goto error; | |
bd238fb4 LI |
1343 | } |
1344 | ||
51a87c55 | 1345 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1346 | |
51a87c55 EVH |
1347 | p9_free_req(clnt, req); |
1348 | error: | |
bd238fb4 LI |
1349 | return err; |
1350 | } | |
1351 | EXPORT_SYMBOL(p9_client_wstat); |