]>
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 | 74 | /* Interpret mount option for protocol version */ |
3dc9fef6 | 75 | static int get_protocol_version(const substring_t *name) |
0fb80abd | 76 | { |
3dc9fef6 DC |
77 | int version = -EINVAL; |
78 | ||
0fb80abd SK |
79 | if (!strncmp("9p2000", name->from, name->to-name->from)) { |
80 | version = p9_proto_legacy; | |
81 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); | |
82 | } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) { | |
83 | version = p9_proto_2000u; | |
84 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); | |
45bc21ed SK |
85 | } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) { |
86 | version = p9_proto_2000L; | |
87 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); | |
0fb80abd SK |
88 | } else { |
89 | P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ", | |
90 | name->from); | |
91 | } | |
92 | return version; | |
93 | } | |
94 | ||
51a87c55 EVH |
95 | static struct p9_req_t * |
96 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
91b8534f | 97 | |
8a0dc95f | 98 | /** |
0e15597e AK |
99 | * parse_options - parse mount options into client structure |
100 | * @opts: options string passed from mount | |
101 | * @clnt: existing v9fs client information | |
8a0dc95f | 102 | * |
bb8ffdfc | 103 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
104 | */ |
105 | ||
bb8ffdfc | 106 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 107 | { |
d8c8a9e3 | 108 | char *options, *tmp_options; |
8a0dc95f EVH |
109 | char *p; |
110 | substring_t args[MAX_OPT_ARGS]; | |
111 | int option; | |
bb8ffdfc | 112 | int ret = 0; |
8a0dc95f | 113 | |
342fee1d | 114 | clnt->proto_version = p9_proto_2000u; |
8a0dc95f EVH |
115 | clnt->msize = 8192; |
116 | ||
bb8ffdfc EVH |
117 | if (!opts) |
118 | return 0; | |
119 | ||
d8c8a9e3 EVH |
120 | tmp_options = kstrdup(opts, GFP_KERNEL); |
121 | if (!tmp_options) { | |
bb8ffdfc EVH |
122 | P9_DPRINTK(P9_DEBUG_ERROR, |
123 | "failed to allocate copy of option string\n"); | |
124 | return -ENOMEM; | |
125 | } | |
d8c8a9e3 | 126 | options = tmp_options; |
8a0dc95f EVH |
127 | |
128 | while ((p = strsep(&options, ",")) != NULL) { | |
129 | int token; | |
130 | if (!*p) | |
131 | continue; | |
132 | token = match_token(p, tokens, args); | |
133 | if (token < Opt_trans) { | |
bb8ffdfc EVH |
134 | int r = match_int(&args[0], &option); |
135 | if (r < 0) { | |
8a0dc95f EVH |
136 | P9_DPRINTK(P9_DEBUG_ERROR, |
137 | "integer field, but no integer?\n"); | |
bb8ffdfc | 138 | ret = r; |
8a0dc95f EVH |
139 | continue; |
140 | } | |
141 | } | |
142 | switch (token) { | |
143 | case Opt_msize: | |
144 | clnt->msize = option; | |
145 | break; | |
146 | case Opt_trans: | |
72029fe8 | 147 | clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); |
349d3bb8 EVH |
148 | if(clnt->trans_mod == NULL) { |
149 | P9_DPRINTK(P9_DEBUG_ERROR, | |
150 | "Could not find request transport: %s\n", | |
151 | (char *) &args[0]); | |
152 | ret = -EINVAL; | |
153 | goto free_and_return; | |
154 | } | |
8a0dc95f EVH |
155 | break; |
156 | case Opt_legacy: | |
342fee1d | 157 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 158 | break; |
0fb80abd SK |
159 | case Opt_version: |
160 | ret = get_protocol_version(&args[0]); | |
161 | if (ret == -EINVAL) | |
162 | goto free_and_return; | |
163 | clnt->proto_version = ret; | |
164 | break; | |
8a0dc95f EVH |
165 | default: |
166 | continue; | |
167 | } | |
168 | } | |
72029fe8 | 169 | |
349d3bb8 | 170 | free_and_return: |
d8c8a9e3 | 171 | kfree(tmp_options); |
bb8ffdfc | 172 | return ret; |
8a0dc95f EVH |
173 | } |
174 | ||
fea511a6 EVH |
175 | /** |
176 | * p9_tag_alloc - lookup/allocate a request by tag | |
177 | * @c: client session to lookup tag within | |
178 | * @tag: numeric id for transaction | |
179 | * | |
180 | * this is a simple array lookup, but will grow the | |
181 | * request_slots as necessary to accomodate transaction | |
182 | * ids which did not previously have a slot. | |
183 | * | |
184 | * this code relies on the client spinlock to manage locks, its | |
185 | * possible we should switch to something else, but I'd rather | |
186 | * stick with something low-overhead for the common case. | |
187 | * | |
188 | */ | |
189 | ||
51a87c55 | 190 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) |
fea511a6 EVH |
191 | { |
192 | unsigned long flags; | |
193 | int row, col; | |
51a87c55 | 194 | struct p9_req_t *req; |
fea511a6 EVH |
195 | |
196 | /* This looks up the original request by tag so we know which | |
197 | * buffer to read the data into */ | |
198 | tag++; | |
199 | ||
200 | if (tag >= c->max_tag) { | |
201 | spin_lock_irqsave(&c->lock, flags); | |
202 | /* check again since original check was outside of lock */ | |
203 | while (tag >= c->max_tag) { | |
204 | row = (tag / P9_ROW_MAXTAG); | |
205 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
206 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
207 | ||
208 | if (!c->reqs[row]) { | |
209 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
e45c5405 | 210 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 211 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
212 | } |
213 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
214 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 215 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
216 | } |
217 | c->max_tag += P9_ROW_MAXTAG; | |
218 | } | |
219 | spin_unlock_irqrestore(&c->lock, flags); | |
220 | } | |
221 | row = tag / P9_ROW_MAXTAG; | |
222 | col = tag % P9_ROW_MAXTAG; | |
223 | ||
51a87c55 EVH |
224 | req = &c->reqs[row][col]; |
225 | if (!req->tc) { | |
226 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); | |
227 | if (!req->wq) { | |
228 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
229 | return ERR_PTR(-ENOMEM); | |
230 | } | |
231 | init_waitqueue_head(req->wq); | |
232 | req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
233 | GFP_KERNEL); | |
234 | req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, | |
235 | GFP_KERNEL); | |
236 | if ((!req->tc) || (!req->rc)) { | |
237 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
238 | kfree(req->tc); | |
239 | kfree(req->rc); | |
45abdf1c TT |
240 | kfree(req->wq); |
241 | req->tc = req->rc = NULL; | |
242 | req->wq = NULL; | |
51a87c55 EVH |
243 | return ERR_PTR(-ENOMEM); |
244 | } | |
245 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); | |
246 | req->tc->capacity = c->msize; | |
247 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); | |
248 | req->rc->capacity = c->msize; | |
249 | } | |
250 | ||
251 | p9pdu_reset(req->tc); | |
252 | p9pdu_reset(req->rc); | |
253 | ||
51a87c55 EVH |
254 | req->tc->tag = tag-1; |
255 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
256 | |
257 | return &c->reqs[row][col]; | |
258 | } | |
fea511a6 EVH |
259 | |
260 | /** | |
261 | * p9_tag_lookup - lookup a request by tag | |
262 | * @c: client session to lookup tag within | |
263 | * @tag: numeric id for transaction | |
264 | * | |
265 | */ | |
266 | ||
267 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
268 | { | |
269 | int row, col; | |
270 | ||
271 | /* This looks up the original request by tag so we know which | |
272 | * buffer to read the data into */ | |
273 | tag++; | |
274 | ||
275 | BUG_ON(tag >= c->max_tag); | |
276 | ||
277 | row = tag / P9_ROW_MAXTAG; | |
278 | col = tag % P9_ROW_MAXTAG; | |
279 | ||
280 | return &c->reqs[row][col]; | |
281 | } | |
282 | EXPORT_SYMBOL(p9_tag_lookup); | |
283 | ||
284 | /** | |
285 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 286 | * @c: v9fs client struct |
fea511a6 EVH |
287 | * |
288 | * This initializes the tags structure for each client instance. | |
289 | * | |
290 | */ | |
291 | ||
292 | static int p9_tag_init(struct p9_client *c) | |
293 | { | |
294 | int err = 0; | |
295 | ||
296 | c->tagpool = p9_idpool_create(); | |
297 | if (IS_ERR(c->tagpool)) { | |
298 | err = PTR_ERR(c->tagpool); | |
299 | c->tagpool = NULL; | |
300 | goto error; | |
301 | } | |
302 | ||
303 | p9_idpool_get(c->tagpool); /* reserve tag 0 */ | |
304 | ||
305 | c->max_tag = 0; | |
306 | error: | |
307 | return err; | |
308 | } | |
309 | ||
310 | /** | |
311 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 312 | * @c: v9fs client struct |
fea511a6 EVH |
313 | * |
314 | * This frees resources associated with the tags structure | |
315 | * | |
316 | */ | |
317 | static void p9_tag_cleanup(struct p9_client *c) | |
318 | { | |
319 | int row, col; | |
320 | ||
321 | /* check to insure all requests are idle */ | |
322 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
323 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
324 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
325 | P9_DPRINTK(P9_DEBUG_MUX, | |
326 | "Attempting to cleanup non-free tag %d,%d\n", | |
327 | row, col); | |
328 | /* TODO: delay execution of cleanup */ | |
329 | return; | |
330 | } | |
331 | } | |
332 | } | |
333 | ||
334 | if (c->tagpool) | |
335 | p9_idpool_destroy(c->tagpool); | |
336 | ||
337 | /* free requests associated with tags */ | |
338 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 339 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 340 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
341 | kfree(c->reqs[row][col].tc); |
342 | kfree(c->reqs[row][col].rc); | |
343 | } | |
fea511a6 EVH |
344 | kfree(c->reqs[row]); |
345 | } | |
346 | c->max_tag = 0; | |
347 | } | |
348 | ||
673d62cd EVH |
349 | /** |
350 | * p9_free_req - free a request and clean-up as necessary | |
351 | * c: client state | |
352 | * r: request to release | |
353 | * | |
354 | */ | |
355 | ||
51a87c55 | 356 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 357 | { |
51a87c55 EVH |
358 | int tag = r->tc->tag; |
359 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
360 | ||
673d62cd | 361 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
362 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
363 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
364 | } |
365 | ||
91b8534f EVH |
366 | /** |
367 | * p9_client_cb - call back from transport to client | |
368 | * c: client state | |
369 | * req: request received | |
370 | * | |
371 | */ | |
372 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
373 | { | |
51a87c55 | 374 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 LI |
375 | wake_up(req->wq); |
376 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
91b8534f EVH |
377 | } |
378 | EXPORT_SYMBOL(p9_client_cb); | |
379 | ||
51a87c55 EVH |
380 | /** |
381 | * p9_parse_header - parse header arguments out of a packet | |
382 | * @pdu: packet to parse | |
383 | * @size: size of packet | |
384 | * @type: type of request | |
385 | * @tag: tag of packet | |
386 | * @rewind: set if we need to rewind offset afterwards | |
387 | */ | |
388 | ||
389 | int | |
390 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
391 | int rewind) | |
392 | { | |
393 | int8_t r_type; | |
394 | int16_t r_tag; | |
395 | int32_t r_size; | |
396 | int offset = pdu->offset; | |
397 | int err; | |
398 | ||
399 | pdu->offset = 0; | |
400 | if (pdu->size == 0) | |
401 | pdu->size = 7; | |
402 | ||
403 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
404 | if (err) | |
405 | goto rewind_and_exit; | |
406 | ||
407 | pdu->size = r_size; | |
408 | pdu->id = r_type; | |
409 | pdu->tag = r_tag; | |
410 | ||
e7f4b8f1 EVH |
411 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
412 | pdu->id, pdu->tag); | |
51a87c55 EVH |
413 | |
414 | if (type) | |
415 | *type = r_type; | |
416 | if (tag) | |
417 | *tag = r_tag; | |
418 | if (size) | |
419 | *size = r_size; | |
420 | ||
421 | ||
422 | rewind_and_exit: | |
423 | if (rewind) | |
424 | pdu->offset = offset; | |
425 | return err; | |
426 | } | |
427 | EXPORT_SYMBOL(p9_parse_header); | |
428 | ||
429 | /** | |
430 | * p9_check_errors - check 9p packet for error return and process it | |
431 | * @c: current client instance | |
432 | * @req: request to parse and check for error conditions | |
433 | * | |
434 | * returns error code if one is discovered, otherwise returns 0 | |
435 | * | |
436 | * this will have to be more complicated if we have multiple | |
437 | * error packet types | |
438 | */ | |
439 | ||
440 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
441 | { | |
442 | int8_t type; | |
443 | int err; | |
444 | ||
445 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
446 | if (err) { | |
447 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
448 | return err; | |
449 | } | |
450 | ||
451 | if (type == P9_RERROR) { | |
452 | int ecode; | |
453 | char *ename; | |
454 | ||
342fee1d SK |
455 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
456 | &ename, &ecode); | |
51a87c55 EVH |
457 | if (err) { |
458 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", | |
459 | err); | |
460 | return err; | |
461 | } | |
462 | ||
342fee1d | 463 | if (p9_is_proto_dotu(c)) |
51a87c55 EVH |
464 | err = -ecode; |
465 | ||
0aad37ef | 466 | if (!err || !IS_ERR_VALUE(err)) |
51a87c55 EVH |
467 | err = p9_errstr2errno(ename, strlen(ename)); |
468 | ||
51a87c55 EVH |
469 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); |
470 | ||
471 | kfree(ename); | |
472 | } else | |
473 | err = 0; | |
474 | ||
475 | return err; | |
476 | } | |
477 | ||
478 | /** | |
479 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
480 | * @c: client state |
481 | * @oldreq: request to cancel | |
51a87c55 EVH |
482 | * |
483 | * This sents a flush for a particular requests and links | |
484 | * the flush request to the original request. The current | |
485 | * code only supports a single flush request although the protocol | |
486 | * allows for multiple flush requests to be sent for a single request. | |
487 | * | |
488 | */ | |
489 | ||
490 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
491 | { | |
492 | struct p9_req_t *req; | |
493 | int16_t oldtag; | |
494 | int err; | |
495 | ||
496 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
497 | if (err) | |
498 | return err; | |
499 | ||
500 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
501 | ||
502 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
503 | if (IS_ERR(req)) | |
504 | return PTR_ERR(req); | |
505 | ||
51a87c55 | 506 | |
1bab88b2 LI |
507 | /* if we haven't received a response for oldreq, |
508 | remove it from the list. */ | |
509 | spin_lock(&c->lock); | |
510 | if (oldreq->status == REQ_STATUS_FLSH) | |
511 | list_del(&oldreq->req_list); | |
512 | spin_unlock(&c->lock); | |
513 | ||
514 | p9_free_req(c, req); | |
51a87c55 EVH |
515 | return 0; |
516 | } | |
517 | ||
91b8534f EVH |
518 | /** |
519 | * p9_client_rpc - issue a request and wait for a response | |
520 | * @c: client session | |
51a87c55 EVH |
521 | * @type: type of request |
522 | * @fmt: protocol format string (see protocol.c) | |
91b8534f | 523 | * |
51a87c55 | 524 | * Returns request structure (which client must free using p9_free_req) |
91b8534f EVH |
525 | */ |
526 | ||
51a87c55 EVH |
527 | static struct p9_req_t * |
528 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
91b8534f | 529 | { |
51a87c55 EVH |
530 | va_list ap; |
531 | int tag, err; | |
91b8534f EVH |
532 | struct p9_req_t *req; |
533 | unsigned long flags; | |
534 | int sigpending; | |
91b8534f | 535 | |
51a87c55 | 536 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 537 | |
6d96d3ab AK |
538 | /* we allow for any status other than disconnected */ |
539 | if (c->status == Disconnected) | |
540 | return ERR_PTR(-EIO); | |
541 | ||
542 | /* if status is begin_disconnected we allow only clunk request */ | |
543 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 544 | return ERR_PTR(-EIO); |
91b8534f EVH |
545 | |
546 | if (signal_pending(current)) { | |
547 | sigpending = 1; | |
548 | clear_thread_flag(TIF_SIGPENDING); | |
549 | } else | |
550 | sigpending = 0; | |
551 | ||
552 | tag = P9_NOTAG; | |
51a87c55 | 553 | if (type != P9_TVERSION) { |
91b8534f EVH |
554 | tag = p9_idpool_get(c->tagpool); |
555 | if (tag < 0) | |
51a87c55 | 556 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
557 | } |
558 | ||
559 | req = p9_tag_alloc(c, tag); | |
51a87c55 EVH |
560 | if (IS_ERR(req)) |
561 | return req; | |
91b8534f | 562 | |
51a87c55 EVH |
563 | /* marshall the data */ |
564 | p9pdu_prepare(req->tc, tag, type); | |
565 | va_start(ap, fmt); | |
342fee1d | 566 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
51a87c55 EVH |
567 | va_end(ap); |
568 | p9pdu_finalize(req->tc); | |
91b8534f EVH |
569 | |
570 | err = c->trans_mod->request(c, req); | |
571 | if (err < 0) { | |
572 | c->status = Disconnected; | |
573 | goto reterr; | |
574 | } | |
575 | ||
51a87c55 | 576 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
91b8534f EVH |
577 | err = wait_event_interruptible(*req->wq, |
578 | req->status >= REQ_STATUS_RCVD); | |
1bab88b2 LI |
579 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
580 | req->wq, tag, err); | |
91b8534f EVH |
581 | |
582 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 583 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 584 | err = req->t_err; |
91b8534f EVH |
585 | } |
586 | ||
1bab88b2 | 587 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
51a87c55 | 588 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 589 | sigpending = 1; |
91b8534f EVH |
590 | clear_thread_flag(TIF_SIGPENDING); |
591 | ||
1bab88b2 LI |
592 | if (c->trans_mod->cancel(c, req)) |
593 | p9_client_flush(c, req); | |
594 | ||
595 | /* if we received the response anyway, don't signal error */ | |
596 | if (req->status == REQ_STATUS_RCVD) | |
597 | err = 0; | |
91b8534f EVH |
598 | } |
599 | ||
600 | if (sigpending) { | |
601 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
602 | recalc_sigpending(); | |
603 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
604 | } | |
605 | ||
606 | if (err < 0) | |
607 | goto reterr; | |
608 | ||
51a87c55 EVH |
609 | err = p9_check_errors(c, req); |
610 | if (!err) { | |
611 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
612 | return req; | |
91b8534f EVH |
613 | } |
614 | ||
91b8534f | 615 | reterr: |
51a87c55 EVH |
616 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
617 | err); | |
91b8534f | 618 | p9_free_req(c, req); |
51a87c55 | 619 | return ERR_PTR(err); |
91b8534f EVH |
620 | } |
621 | ||
5503ac56 EVH |
622 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
623 | { | |
9f3e9bbe | 624 | int ret; |
5503ac56 | 625 | struct p9_fid *fid; |
cac23d65 | 626 | unsigned long flags; |
5503ac56 | 627 | |
51a87c55 | 628 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
629 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
630 | if (!fid) | |
631 | return ERR_PTR(-ENOMEM); | |
632 | ||
9f3e9bbe | 633 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 634 | if (ret < 0) { |
9f3e9bbe | 635 | ret = -ENOSPC; |
5503ac56 EVH |
636 | goto error; |
637 | } | |
9f3e9bbe | 638 | fid->fid = ret; |
5503ac56 EVH |
639 | |
640 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
641 | fid->mode = -1; | |
f8b9d53a | 642 | fid->uid = current_fsuid(); |
5503ac56 | 643 | fid->clnt = clnt; |
3e2796a9 | 644 | fid->rdir = NULL; |
cac23d65 | 645 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 646 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 647 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
648 | |
649 | return fid; | |
650 | ||
651 | error: | |
652 | kfree(fid); | |
9f3e9bbe | 653 | return ERR_PTR(ret); |
5503ac56 EVH |
654 | } |
655 | ||
656 | static void p9_fid_destroy(struct p9_fid *fid) | |
657 | { | |
658 | struct p9_client *clnt; | |
cac23d65 | 659 | unsigned long flags; |
5503ac56 | 660 | |
51a87c55 | 661 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
662 | clnt = fid->clnt; |
663 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 664 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 665 | list_del(&fid->flist); |
cac23d65 | 666 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 667 | kfree(fid->rdir); |
5503ac56 EVH |
668 | kfree(fid); |
669 | } | |
8a0dc95f | 670 | |
51a87c55 | 671 | int p9_client_version(struct p9_client *c) |
bd238fb4 | 672 | { |
6936bf60 | 673 | int err = 0; |
51a87c55 EVH |
674 | struct p9_req_t *req; |
675 | char *version; | |
676 | int msize; | |
bd238fb4 | 677 | |
342fee1d SK |
678 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
679 | c->msize, c->proto_version); | |
c5a7697d SK |
680 | |
681 | switch (c->proto_version) { | |
45bc21ed | 682 | case p9_proto_2000L: |
c5a7697d | 683 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 684 | c->msize, "9P2000.L"); |
c5a7697d SK |
685 | break; |
686 | case p9_proto_2000u: | |
687 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
688 | c->msize, "9P2000.u"); | |
689 | break; | |
690 | case p9_proto_legacy: | |
691 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
692 | c->msize, "9P2000"); | |
693 | break; | |
694 | default: | |
695 | return -EINVAL; | |
696 | break; | |
697 | } | |
698 | ||
51a87c55 EVH |
699 | if (IS_ERR(req)) |
700 | return PTR_ERR(req); | |
6936bf60 | 701 | |
342fee1d | 702 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 EVH |
703 | if (err) { |
704 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
e7f4b8f1 | 705 | p9pdu_dump(1, req->rc); |
6936bf60 | 706 | goto error; |
51a87c55 | 707 | } |
6936bf60 | 708 | |
51a87c55 | 709 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
710 | if (!strncmp(version, "9P2000.L", 8)) |
711 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 712 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
713 | c->proto_version = p9_proto_2000u; |
714 | else if (!strncmp(version, "9P2000", 6)) | |
715 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
716 | else { |
717 | err = -EREMOTEIO; | |
718 | goto error; | |
719 | } | |
720 | ||
51a87c55 EVH |
721 | if (msize < c->msize) |
722 | c->msize = msize; | |
6936bf60 EVH |
723 | |
724 | error: | |
51a87c55 EVH |
725 | kfree(version); |
726 | p9_free_req(c, req); | |
6936bf60 EVH |
727 | |
728 | return err; | |
729 | } | |
51a87c55 | 730 | EXPORT_SYMBOL(p9_client_version); |
6936bf60 EVH |
731 | |
732 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
733 | { | |
734 | int err; | |
735 | struct p9_client *clnt; | |
736 | ||
737 | err = 0; | |
bd238fb4 LI |
738 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
739 | if (!clnt) | |
740 | return ERR_PTR(-ENOMEM); | |
741 | ||
72029fe8 | 742 | clnt->trans_mod = NULL; |
bb8ffdfc | 743 | clnt->trans = NULL; |
bd238fb4 | 744 | spin_lock_init(&clnt->lock); |
bd238fb4 | 745 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 746 | |
fea511a6 EVH |
747 | p9_tag_init(clnt); |
748 | ||
bb8ffdfc EVH |
749 | err = parse_opts(options, clnt); |
750 | if (err < 0) | |
8781ff94 | 751 | goto free_client; |
bb8ffdfc | 752 | |
a17d1720 AK |
753 | if (!clnt->trans_mod) |
754 | clnt->trans_mod = v9fs_get_default_trans(); | |
755 | ||
8a0dc95f EVH |
756 | if (clnt->trans_mod == NULL) { |
757 | err = -EPROTONOSUPPORT; | |
758 | P9_DPRINTK(P9_DEBUG_ERROR, | |
759 | "No transport defined or default transport\n"); | |
8781ff94 EVH |
760 | goto free_client; |
761 | } | |
762 | ||
763 | clnt->fidpool = p9_idpool_create(); | |
764 | if (IS_ERR(clnt->fidpool)) { | |
765 | err = PTR_ERR(clnt->fidpool); | |
766 | clnt->fidpool = NULL; | |
767 | goto put_trans; | |
8a0dc95f EVH |
768 | } |
769 | ||
342fee1d SK |
770 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
771 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 772 | |
8b81ef58 EVH |
773 | err = clnt->trans_mod->create(clnt, dev_name, options); |
774 | if (err) | |
8781ff94 | 775 | goto destroy_fidpool; |
bd238fb4 | 776 | |
8a0dc95f EVH |
777 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
778 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
779 | ||
6936bf60 | 780 | err = p9_client_version(clnt); |
bd238fb4 | 781 | if (err) |
8781ff94 | 782 | goto close_trans; |
bd238fb4 | 783 | |
bd238fb4 LI |
784 | return clnt; |
785 | ||
8781ff94 EVH |
786 | close_trans: |
787 | clnt->trans_mod->close(clnt); | |
788 | destroy_fidpool: | |
789 | p9_idpool_destroy(clnt->fidpool); | |
790 | put_trans: | |
791 | v9fs_put_trans(clnt->trans_mod); | |
792 | free_client: | |
793 | kfree(clnt); | |
bd238fb4 LI |
794 | return ERR_PTR(err); |
795 | } | |
796 | EXPORT_SYMBOL(p9_client_create); | |
797 | ||
798 | void p9_client_destroy(struct p9_client *clnt) | |
799 | { | |
800 | struct p9_fid *fid, *fidptr; | |
801 | ||
51a87c55 | 802 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 803 | |
8b81ef58 EVH |
804 | if (clnt->trans_mod) |
805 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 806 | |
72029fe8 TH |
807 | v9fs_put_trans(clnt->trans_mod); |
808 | ||
6d96d3ab AK |
809 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
810 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); | |
bd238fb4 | 811 | p9_fid_destroy(fid); |
6d96d3ab | 812 | } |
bd238fb4 | 813 | |
0af8887e EVH |
814 | if (clnt->fidpool) |
815 | p9_idpool_destroy(clnt->fidpool); | |
816 | ||
fea511a6 EVH |
817 | p9_tag_cleanup(clnt); |
818 | ||
bd238fb4 LI |
819 | kfree(clnt); |
820 | } | |
821 | EXPORT_SYMBOL(p9_client_destroy); | |
822 | ||
823 | void p9_client_disconnect(struct p9_client *clnt) | |
824 | { | |
825 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 826 | clnt->status = Disconnected; |
bd238fb4 LI |
827 | } |
828 | EXPORT_SYMBOL(p9_client_disconnect); | |
829 | ||
6d96d3ab AK |
830 | void p9_client_begin_disconnect(struct p9_client *clnt) |
831 | { | |
832 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
833 | clnt->status = BeginDisconnect; | |
834 | } | |
835 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
836 | ||
bd238fb4 | 837 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
ba17674f | 838 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
839 | { |
840 | int err; | |
51a87c55 | 841 | struct p9_req_t *req; |
bd238fb4 | 842 | struct p9_fid *fid; |
51a87c55 | 843 | struct p9_qid qid; |
bd238fb4 | 844 | |
51a87c55 EVH |
845 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
846 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 847 | err = 0; |
bd238fb4 LI |
848 | |
849 | fid = p9_fid_create(clnt); | |
850 | if (IS_ERR(fid)) { | |
851 | err = PTR_ERR(fid); | |
852 | fid = NULL; | |
853 | goto error; | |
854 | } | |
855 | ||
51a87c55 EVH |
856 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
857 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
858 | if (IS_ERR(req)) { | |
859 | err = PTR_ERR(req); | |
bd238fb4 LI |
860 | goto error; |
861 | } | |
862 | ||
342fee1d | 863 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 864 | if (err) { |
e7f4b8f1 | 865 | p9pdu_dump(1, req->rc); |
51a87c55 | 866 | p9_free_req(clnt, req); |
bd238fb4 | 867 | goto error; |
51a87c55 | 868 | } |
bd238fb4 | 869 | |
51a87c55 | 870 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
871 | qid.type, |
872 | (unsigned long long)qid.path, | |
873 | qid.version); | |
51a87c55 EVH |
874 | |
875 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
876 | ||
877 | p9_free_req(clnt, req); | |
bd238fb4 LI |
878 | return fid; |
879 | ||
880 | error: | |
bd238fb4 LI |
881 | if (fid) |
882 | p9_fid_destroy(fid); | |
883 | return ERR_PTR(err); | |
884 | } | |
885 | EXPORT_SYMBOL(p9_client_attach); | |
886 | ||
51a87c55 EVH |
887 | struct p9_fid * |
888 | p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) | |
bd238fb4 LI |
889 | { |
890 | int err; | |
51a87c55 EVH |
891 | struct p9_req_t *req; |
892 | struct p9_qid qid; | |
893 | struct p9_fid *afid; | |
bd238fb4 | 894 | |
51a87c55 | 895 | P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); |
bd238fb4 | 896 | err = 0; |
bd238fb4 | 897 | |
51a87c55 EVH |
898 | afid = p9_fid_create(clnt); |
899 | if (IS_ERR(afid)) { | |
900 | err = PTR_ERR(afid); | |
901 | afid = NULL; | |
bd238fb4 LI |
902 | goto error; |
903 | } | |
904 | ||
51a87c55 EVH |
905 | req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", |
906 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
907 | if (IS_ERR(req)) { | |
908 | err = PTR_ERR(req); | |
bd238fb4 LI |
909 | goto error; |
910 | } | |
911 | ||
342fee1d | 912 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 913 | if (err) { |
e7f4b8f1 | 914 | p9pdu_dump(1, req->rc); |
51a87c55 | 915 | p9_free_req(clnt, req); |
bd238fb4 | 916 | goto error; |
51a87c55 | 917 | } |
bd238fb4 | 918 | |
51a87c55 | 919 | P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", |
b0d5fdef RD |
920 | qid.type, |
921 | (unsigned long long)qid.path, | |
922 | qid.version); | |
51a87c55 EVH |
923 | |
924 | memmove(&afid->qid, &qid, sizeof(struct p9_qid)); | |
925 | p9_free_req(clnt, req); | |
926 | return afid; | |
bd238fb4 LI |
927 | |
928 | error: | |
51a87c55 EVH |
929 | if (afid) |
930 | p9_fid_destroy(afid); | |
bd238fb4 LI |
931 | return ERR_PTR(err); |
932 | } | |
933 | EXPORT_SYMBOL(p9_client_auth); | |
934 | ||
935 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, | |
936 | int clone) | |
937 | { | |
938 | int err; | |
bd238fb4 LI |
939 | struct p9_client *clnt; |
940 | struct p9_fid *fid; | |
51a87c55 EVH |
941 | struct p9_qid *wqids; |
942 | struct p9_req_t *req; | |
943 | int16_t nwqids, count; | |
bd238fb4 | 944 | |
bd238fb4 | 945 | err = 0; |
bd238fb4 LI |
946 | clnt = oldfid->clnt; |
947 | if (clone) { | |
948 | fid = p9_fid_create(clnt); | |
949 | if (IS_ERR(fid)) { | |
950 | err = PTR_ERR(fid); | |
951 | fid = NULL; | |
952 | goto error; | |
953 | } | |
954 | ||
955 | fid->uid = oldfid->uid; | |
956 | } else | |
957 | fid = oldfid; | |
958 | ||
51a87c55 EVH |
959 | |
960 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
961 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
962 | ||
963 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
964 | nwname, wnames); | |
965 | if (IS_ERR(req)) { | |
966 | err = PTR_ERR(req); | |
bd238fb4 LI |
967 | goto error; |
968 | } | |
969 | ||
342fee1d | 970 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 EVH |
971 | if (err) { |
972 | p9pdu_dump(1, req->rc); | |
973 | p9_free_req(clnt, req); | |
51a87c55 | 974 | goto clunk_fid; |
e7f4b8f1 EVH |
975 | } |
976 | p9_free_req(clnt, req); | |
bd238fb4 | 977 | |
51a87c55 EVH |
978 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
979 | ||
980 | if (nwqids != nwname) { | |
bd238fb4 LI |
981 | err = -ENOENT; |
982 | goto clunk_fid; | |
983 | } | |
984 | ||
51a87c55 EVH |
985 | for (count = 0; count < nwqids; count++) |
986 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
987 | count, wqids[count].type, |
988 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
989 | wqids[count].version); |
990 | ||
bd238fb4 | 991 | if (nwname) |
51a87c55 | 992 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
993 | else |
994 | fid->qid = oldfid->qid; | |
995 | ||
bd238fb4 LI |
996 | return fid; |
997 | ||
998 | clunk_fid: | |
51a87c55 EVH |
999 | p9_client_clunk(fid); |
1000 | fid = NULL; | |
bd238fb4 LI |
1001 | |
1002 | error: | |
bd238fb4 LI |
1003 | if (fid && (fid != oldfid)) |
1004 | p9_fid_destroy(fid); | |
1005 | ||
1006 | return ERR_PTR(err); | |
1007 | } | |
1008 | EXPORT_SYMBOL(p9_client_walk); | |
1009 | ||
1010 | int p9_client_open(struct p9_fid *fid, int mode) | |
1011 | { | |
1012 | int err; | |
bd238fb4 | 1013 | struct p9_client *clnt; |
51a87c55 EVH |
1014 | struct p9_req_t *req; |
1015 | struct p9_qid qid; | |
1016 | int iounit; | |
bd238fb4 | 1017 | |
51a87c55 | 1018 | P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); |
bd238fb4 | 1019 | err = 0; |
bd238fb4 LI |
1020 | clnt = fid->clnt; |
1021 | ||
1022 | if (fid->mode != -1) | |
1023 | return -EINVAL; | |
1024 | ||
51a87c55 EVH |
1025 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
1026 | if (IS_ERR(req)) { | |
1027 | err = PTR_ERR(req); | |
1028 | goto error; | |
bd238fb4 LI |
1029 | } |
1030 | ||
342fee1d | 1031 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1032 | if (err) { |
1033 | p9pdu_dump(1, req->rc); | |
1034 | goto free_and_error; | |
1035 | } | |
51a87c55 EVH |
1036 | |
1037 | P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1038 | qid.type, |
1039 | (unsigned long long)qid.path, | |
1040 | qid.version, iounit); | |
bd238fb4 LI |
1041 | |
1042 | fid->mode = mode; | |
51a87c55 | 1043 | fid->iounit = iounit; |
bd238fb4 | 1044 | |
e7f4b8f1 EVH |
1045 | free_and_error: |
1046 | p9_free_req(clnt, req); | |
51a87c55 | 1047 | error: |
bd238fb4 LI |
1048 | return err; |
1049 | } | |
1050 | EXPORT_SYMBOL(p9_client_open); | |
1051 | ||
1052 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, | |
1053 | char *extension) | |
1054 | { | |
1055 | int err; | |
bd238fb4 | 1056 | struct p9_client *clnt; |
51a87c55 EVH |
1057 | struct p9_req_t *req; |
1058 | struct p9_qid qid; | |
1059 | int iounit; | |
bd238fb4 | 1060 | |
51a87c55 EVH |
1061 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1062 | fid->fid, name, perm, mode); | |
bd238fb4 | 1063 | err = 0; |
bd238fb4 LI |
1064 | clnt = fid->clnt; |
1065 | ||
1066 | if (fid->mode != -1) | |
1067 | return -EINVAL; | |
1068 | ||
51a87c55 EVH |
1069 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1070 | mode, extension); | |
1071 | if (IS_ERR(req)) { | |
1072 | err = PTR_ERR(req); | |
1073 | goto error; | |
bd238fb4 LI |
1074 | } |
1075 | ||
342fee1d | 1076 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1077 | if (err) { |
1078 | p9pdu_dump(1, req->rc); | |
1079 | goto free_and_error; | |
1080 | } | |
51a87c55 EVH |
1081 | |
1082 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1083 | qid.type, |
1084 | (unsigned long long)qid.path, | |
1085 | qid.version, iounit); | |
bd238fb4 LI |
1086 | |
1087 | fid->mode = mode; | |
51a87c55 | 1088 | fid->iounit = iounit; |
bd238fb4 | 1089 | |
e7f4b8f1 EVH |
1090 | free_and_error: |
1091 | p9_free_req(clnt, req); | |
51a87c55 | 1092 | error: |
bd238fb4 LI |
1093 | return err; |
1094 | } | |
1095 | EXPORT_SYMBOL(p9_client_fcreate); | |
1096 | ||
1097 | int p9_client_clunk(struct p9_fid *fid) | |
1098 | { | |
1099 | int err; | |
bd238fb4 | 1100 | struct p9_client *clnt; |
51a87c55 | 1101 | struct p9_req_t *req; |
bd238fb4 | 1102 | |
51a87c55 | 1103 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1104 | err = 0; |
bd238fb4 LI |
1105 | clnt = fid->clnt; |
1106 | ||
51a87c55 EVH |
1107 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1108 | if (IS_ERR(req)) { | |
1109 | err = PTR_ERR(req); | |
1110 | goto error; | |
bd238fb4 LI |
1111 | } |
1112 | ||
51a87c55 | 1113 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1114 | |
51a87c55 | 1115 | p9_free_req(clnt, req); |
bd238fb4 LI |
1116 | p9_fid_destroy(fid); |
1117 | ||
51a87c55 | 1118 | error: |
bd238fb4 LI |
1119 | return err; |
1120 | } | |
1121 | EXPORT_SYMBOL(p9_client_clunk); | |
1122 | ||
1123 | int p9_client_remove(struct p9_fid *fid) | |
1124 | { | |
1125 | int err; | |
bd238fb4 | 1126 | struct p9_client *clnt; |
51a87c55 | 1127 | struct p9_req_t *req; |
bd238fb4 | 1128 | |
51a87c55 | 1129 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1130 | err = 0; |
bd238fb4 LI |
1131 | clnt = fid->clnt; |
1132 | ||
51a87c55 EVH |
1133 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1134 | if (IS_ERR(req)) { | |
1135 | err = PTR_ERR(req); | |
1136 | goto error; | |
bd238fb4 LI |
1137 | } |
1138 | ||
51a87c55 | 1139 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1140 | |
51a87c55 | 1141 | p9_free_req(clnt, req); |
bd238fb4 LI |
1142 | p9_fid_destroy(fid); |
1143 | ||
51a87c55 | 1144 | error: |
bd238fb4 LI |
1145 | return err; |
1146 | } | |
1147 | EXPORT_SYMBOL(p9_client_remove); | |
1148 | ||
0fc9655e EVH |
1149 | int |
1150 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1151 | u32 count) | |
bd238fb4 | 1152 | { |
51a87c55 | 1153 | int err, rsize, total; |
bd238fb4 | 1154 | struct p9_client *clnt; |
51a87c55 EVH |
1155 | struct p9_req_t *req; |
1156 | char *dataptr; | |
bd238fb4 | 1157 | |
51a87c55 | 1158 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
bd238fb4 LI |
1159 | (long long unsigned) offset, count); |
1160 | err = 0; | |
bd238fb4 LI |
1161 | clnt = fid->clnt; |
1162 | total = 0; | |
1163 | ||
1164 | rsize = fid->iounit; | |
1165 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1166 | rsize = clnt->msize - P9_IOHDRSZ; | |
1167 | ||
51a87c55 EVH |
1168 | if (count < rsize) |
1169 | rsize = count; | |
bd238fb4 | 1170 | |
51a87c55 EVH |
1171 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1172 | if (IS_ERR(req)) { | |
1173 | err = PTR_ERR(req); | |
1174 | goto error; | |
1175 | } | |
bd238fb4 | 1176 | |
342fee1d | 1177 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 EVH |
1178 | if (err) { |
1179 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1180 | goto free_and_error; |
e7f4b8f1 | 1181 | } |
bd238fb4 | 1182 | |
51a87c55 | 1183 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1184 | |
51a87c55 EVH |
1185 | if (data) { |
1186 | memmove(data, dataptr, count); | |
51a87c55 | 1187 | } |
bd238fb4 | 1188 | |
51a87c55 EVH |
1189 | if (udata) { |
1190 | err = copy_to_user(udata, dataptr, count); | |
1191 | if (err) { | |
1192 | err = -EFAULT; | |
1193 | goto free_and_error; | |
bd238fb4 | 1194 | } |
51a87c55 | 1195 | } |
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_read); |
bd238fb4 LI |
1206 | |
1207 | int | |
0fc9655e EVH |
1208 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1209 | u64 offset, u32 count) | |
bd238fb4 | 1210 | { |
51a87c55 | 1211 | int err, rsize, total; |
bd238fb4 | 1212 | struct p9_client *clnt; |
51a87c55 | 1213 | struct p9_req_t *req; |
bd238fb4 | 1214 | |
51a87c55 EVH |
1215 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1216 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1217 | err = 0; |
bd238fb4 LI |
1218 | clnt = fid->clnt; |
1219 | total = 0; | |
1220 | ||
1221 | rsize = fid->iounit; | |
1222 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1223 | rsize = clnt->msize - P9_IOHDRSZ; | |
1224 | ||
51a87c55 EVH |
1225 | if (count < rsize) |
1226 | rsize = count; | |
1227 | if (data) | |
1228 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1229 | rsize, data); | |
1230 | else | |
1231 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1232 | rsize, udata); | |
1233 | if (IS_ERR(req)) { | |
1234 | err = PTR_ERR(req); | |
1235 | goto error; | |
1236 | } | |
0fc9655e | 1237 | |
342fee1d | 1238 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 EVH |
1239 | if (err) { |
1240 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1241 | goto free_and_error; |
e7f4b8f1 EVH |
1242 | } |
1243 | ||
51a87c55 | 1244 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1245 | |
51a87c55 EVH |
1246 | p9_free_req(clnt, req); |
1247 | return count; | |
bd238fb4 | 1248 | |
51a87c55 EVH |
1249 | free_and_error: |
1250 | p9_free_req(clnt, req); | |
bd238fb4 | 1251 | error: |
bd238fb4 LI |
1252 | return err; |
1253 | } | |
0fc9655e | 1254 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1255 | |
51a87c55 | 1256 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1257 | { |
51a87c55 EVH |
1258 | int err; |
1259 | struct p9_client *clnt; | |
1260 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1261 | struct p9_req_t *req; | |
1262 | u16 ignored; | |
5503ac56 | 1263 | |
51a87c55 | 1264 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1265 | |
5503ac56 EVH |
1266 | if (!ret) |
1267 | return ERR_PTR(-ENOMEM); | |
1268 | ||
bd238fb4 | 1269 | err = 0; |
bd238fb4 LI |
1270 | clnt = fid->clnt; |
1271 | ||
51a87c55 EVH |
1272 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1273 | if (IS_ERR(req)) { | |
1274 | err = PTR_ERR(req); | |
bd238fb4 LI |
1275 | goto error; |
1276 | } | |
1277 | ||
342fee1d | 1278 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1279 | if (err) { |
e7f4b8f1 | 1280 | p9pdu_dump(1, req->rc); |
eedfe1c4 AK |
1281 | p9_free_req(clnt, req); |
1282 | goto error; | |
e7f4b8f1 | 1283 | } |
bd238fb4 | 1284 | |
51a87c55 | 1285 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1286 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1287 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1288 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1289 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1290 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1291 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1292 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1293 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1294 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1295 | |
742b11a7 LI |
1296 | p9_free_req(clnt, req); |
1297 | return ret; | |
1298 | ||
bd238fb4 | 1299 | error: |
742b11a7 LI |
1300 | kfree(ret); |
1301 | return ERR_PTR(err); | |
bd238fb4 LI |
1302 | } |
1303 | EXPORT_SYMBOL(p9_client_stat); | |
1304 | ||
342fee1d | 1305 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1306 | { |
1307 | int ret; | |
1308 | ||
9d6939da | 1309 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1310 | /* size[2] type[2] dev[4] qid[13] */ |
1311 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1312 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1313 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1314 | |
1315 | if (wst->name) | |
1316 | ret += strlen(wst->name); | |
1317 | if (wst->uid) | |
1318 | ret += strlen(wst->uid); | |
1319 | if (wst->gid) | |
1320 | ret += strlen(wst->gid); | |
1321 | if (wst->muid) | |
1322 | ret += strlen(wst->muid); | |
1323 | ||
c56e4acf SK |
1324 | if ((proto_version == p9_proto_2000u) || |
1325 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1326 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1327 | if (wst->extension) | |
1328 | ret += strlen(wst->extension); | |
1329 | } | |
1330 | ||
1331 | return ret; | |
1332 | } | |
1333 | ||
bd238fb4 LI |
1334 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1335 | { | |
1336 | int err; | |
51a87c55 | 1337 | struct p9_req_t *req; |
bd238fb4 LI |
1338 | struct p9_client *clnt; |
1339 | ||
453ed90d LI |
1340 | err = 0; |
1341 | clnt = fid->clnt; | |
342fee1d | 1342 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
51a87c55 | 1343 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1344 | P9_DPRINTK(P9_DEBUG_9P, |
1345 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1346 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1347 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1348 | " uid=%d gid=%d n_muid=%d\n", | |
1349 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1350 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1351 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1352 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1353 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1354 | |
9d6939da | 1355 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1356 | if (IS_ERR(req)) { |
1357 | err = PTR_ERR(req); | |
1358 | goto error; | |
bd238fb4 LI |
1359 | } |
1360 | ||
51a87c55 | 1361 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1362 | |
51a87c55 EVH |
1363 | p9_free_req(clnt, req); |
1364 | error: | |
bd238fb4 LI |
1365 | return err; |
1366 | } | |
1367 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 SK |
1368 | |
1369 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) | |
1370 | { | |
1371 | int err; | |
1372 | struct p9_req_t *req; | |
1373 | struct p9_client *clnt; | |
1374 | ||
1375 | err = 0; | |
1376 | clnt = fid->clnt; | |
1377 | ||
1378 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); | |
1379 | ||
1380 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1381 | if (IS_ERR(req)) { | |
1382 | err = PTR_ERR(req); | |
1383 | goto error; | |
1384 | } | |
1385 | ||
1386 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1387 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1388 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1389 | if (err) { | |
1390 | p9pdu_dump(1, req->rc); | |
1391 | p9_free_req(clnt, req); | |
1392 | goto error; | |
1393 | } | |
1394 | ||
1395 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " | |
1396 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " | |
1397 | "fsid %llu namelen %ld\n", | |
1398 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1399 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1400 | sb->fsid, (long int)sb->namelen); | |
1401 | ||
1402 | p9_free_req(clnt, req); | |
1403 | error: | |
1404 | return err; | |
1405 | } | |
1406 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda SK |
1407 | |
1408 | int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) | |
1409 | { | |
1410 | int err; | |
1411 | struct p9_req_t *req; | |
1412 | struct p9_client *clnt; | |
1413 | ||
1414 | err = 0; | |
1415 | clnt = fid->clnt; | |
1416 | ||
1417 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", | |
1418 | fid->fid, newdirfid->fid, name); | |
1419 | ||
1420 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1421 | newdirfid->fid, name); | |
1422 | if (IS_ERR(req)) { | |
1423 | err = PTR_ERR(req); | |
1424 | goto error; | |
1425 | } | |
1426 | ||
1427 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); | |
1428 | ||
1429 | p9_free_req(clnt, req); | |
1430 | error: | |
1431 | return err; | |
1432 | } | |
1433 | EXPORT_SYMBOL(p9_client_rename); | |
1434 |