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Commit | Line | Data |
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bd238fb4 LI |
1 | /* |
2 | * net/9p/clnt.c | |
3 | * | |
4 | * 9P Client | |
5 | * | |
8a0dc95f | 6 | * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
bd238fb4 LI |
7 | * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 | |
11 | * as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
8a0dc95f | 29 | #include <linux/poll.h> |
bd238fb4 LI |
30 | #include <linux/idr.h> |
31 | #include <linux/mutex.h> | |
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 | { | |
a02cec21 | 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 | { | |
a02cec21 | 70 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
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 | ||
62b2be59 LI |
334 | if (c->tagpool) { |
335 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 336 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 337 | } |
fea511a6 EVH |
338 | |
339 | /* free requests associated with tags */ | |
340 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 341 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 342 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
343 | kfree(c->reqs[row][col].tc); |
344 | kfree(c->reqs[row][col].rc); | |
345 | } | |
fea511a6 EVH |
346 | kfree(c->reqs[row]); |
347 | } | |
348 | c->max_tag = 0; | |
349 | } | |
350 | ||
673d62cd EVH |
351 | /** |
352 | * p9_free_req - free a request and clean-up as necessary | |
353 | * c: client state | |
354 | * r: request to release | |
355 | * | |
356 | */ | |
357 | ||
51a87c55 | 358 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 359 | { |
51a87c55 EVH |
360 | int tag = r->tc->tag; |
361 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
362 | ||
673d62cd | 363 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
364 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
365 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
366 | } |
367 | ||
91b8534f EVH |
368 | /** |
369 | * p9_client_cb - call back from transport to client | |
370 | * c: client state | |
371 | * req: request received | |
372 | * | |
373 | */ | |
374 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
375 | { | |
51a87c55 | 376 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 LI |
377 | wake_up(req->wq); |
378 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
91b8534f EVH |
379 | } |
380 | EXPORT_SYMBOL(p9_client_cb); | |
381 | ||
51a87c55 EVH |
382 | /** |
383 | * p9_parse_header - parse header arguments out of a packet | |
384 | * @pdu: packet to parse | |
385 | * @size: size of packet | |
386 | * @type: type of request | |
387 | * @tag: tag of packet | |
388 | * @rewind: set if we need to rewind offset afterwards | |
389 | */ | |
390 | ||
391 | int | |
392 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
393 | int rewind) | |
394 | { | |
395 | int8_t r_type; | |
396 | int16_t r_tag; | |
397 | int32_t r_size; | |
398 | int offset = pdu->offset; | |
399 | int err; | |
400 | ||
401 | pdu->offset = 0; | |
402 | if (pdu->size == 0) | |
403 | pdu->size = 7; | |
404 | ||
405 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
406 | if (err) | |
407 | goto rewind_and_exit; | |
408 | ||
409 | pdu->size = r_size; | |
410 | pdu->id = r_type; | |
411 | pdu->tag = r_tag; | |
412 | ||
e7f4b8f1 EVH |
413 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
414 | pdu->id, pdu->tag); | |
51a87c55 EVH |
415 | |
416 | if (type) | |
417 | *type = r_type; | |
418 | if (tag) | |
419 | *tag = r_tag; | |
420 | if (size) | |
421 | *size = r_size; | |
422 | ||
423 | ||
424 | rewind_and_exit: | |
425 | if (rewind) | |
426 | pdu->offset = offset; | |
427 | return err; | |
428 | } | |
429 | EXPORT_SYMBOL(p9_parse_header); | |
430 | ||
431 | /** | |
432 | * p9_check_errors - check 9p packet for error return and process it | |
433 | * @c: current client instance | |
434 | * @req: request to parse and check for error conditions | |
435 | * | |
436 | * returns error code if one is discovered, otherwise returns 0 | |
437 | * | |
438 | * this will have to be more complicated if we have multiple | |
439 | * error packet types | |
440 | */ | |
441 | ||
442 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
443 | { | |
444 | int8_t type; | |
445 | int err; | |
446 | ||
447 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
448 | if (err) { | |
449 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
450 | return err; | |
451 | } | |
452 | ||
453 | if (type == P9_RERROR) { | |
454 | int ecode; | |
455 | char *ename; | |
456 | ||
342fee1d SK |
457 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
458 | &ename, &ecode); | |
51a87c55 EVH |
459 | if (err) { |
460 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", | |
461 | err); | |
462 | return err; | |
463 | } | |
464 | ||
69d4b443 AK |
465 | if (p9_is_proto_dotu(c) || |
466 | p9_is_proto_dotl(c)) | |
51a87c55 EVH |
467 | err = -ecode; |
468 | ||
0aad37ef | 469 | if (!err || !IS_ERR_VALUE(err)) |
51a87c55 EVH |
470 | err = p9_errstr2errno(ename, strlen(ename)); |
471 | ||
51a87c55 EVH |
472 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); |
473 | ||
474 | kfree(ename); | |
475 | } else | |
476 | err = 0; | |
477 | ||
478 | return err; | |
479 | } | |
480 | ||
481 | /** | |
482 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
483 | * @c: client state |
484 | * @oldreq: request to cancel | |
51a87c55 EVH |
485 | * |
486 | * This sents a flush for a particular requests and links | |
487 | * the flush request to the original request. The current | |
488 | * code only supports a single flush request although the protocol | |
489 | * allows for multiple flush requests to be sent for a single request. | |
490 | * | |
491 | */ | |
492 | ||
493 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
494 | { | |
495 | struct p9_req_t *req; | |
496 | int16_t oldtag; | |
497 | int err; | |
498 | ||
499 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
500 | if (err) | |
501 | return err; | |
502 | ||
503 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
504 | ||
505 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
506 | if (IS_ERR(req)) | |
507 | return PTR_ERR(req); | |
508 | ||
51a87c55 | 509 | |
1bab88b2 LI |
510 | /* if we haven't received a response for oldreq, |
511 | remove it from the list. */ | |
512 | spin_lock(&c->lock); | |
513 | if (oldreq->status == REQ_STATUS_FLSH) | |
514 | list_del(&oldreq->req_list); | |
515 | spin_unlock(&c->lock); | |
516 | ||
517 | p9_free_req(c, req); | |
51a87c55 EVH |
518 | return 0; |
519 | } | |
520 | ||
91b8534f EVH |
521 | /** |
522 | * p9_client_rpc - issue a request and wait for a response | |
523 | * @c: client session | |
51a87c55 EVH |
524 | * @type: type of request |
525 | * @fmt: protocol format string (see protocol.c) | |
91b8534f | 526 | * |
51a87c55 | 527 | * Returns request structure (which client must free using p9_free_req) |
91b8534f EVH |
528 | */ |
529 | ||
51a87c55 EVH |
530 | static struct p9_req_t * |
531 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
91b8534f | 532 | { |
51a87c55 EVH |
533 | va_list ap; |
534 | int tag, err; | |
91b8534f EVH |
535 | struct p9_req_t *req; |
536 | unsigned long flags; | |
537 | int sigpending; | |
91b8534f | 538 | |
51a87c55 | 539 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 540 | |
6d96d3ab AK |
541 | /* we allow for any status other than disconnected */ |
542 | if (c->status == Disconnected) | |
543 | return ERR_PTR(-EIO); | |
544 | ||
545 | /* if status is begin_disconnected we allow only clunk request */ | |
546 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 547 | return ERR_PTR(-EIO); |
91b8534f EVH |
548 | |
549 | if (signal_pending(current)) { | |
550 | sigpending = 1; | |
551 | clear_thread_flag(TIF_SIGPENDING); | |
552 | } else | |
553 | sigpending = 0; | |
554 | ||
555 | tag = P9_NOTAG; | |
51a87c55 | 556 | if (type != P9_TVERSION) { |
91b8534f EVH |
557 | tag = p9_idpool_get(c->tagpool); |
558 | if (tag < 0) | |
51a87c55 | 559 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
560 | } |
561 | ||
562 | req = p9_tag_alloc(c, tag); | |
51a87c55 EVH |
563 | if (IS_ERR(req)) |
564 | return req; | |
91b8534f | 565 | |
51a87c55 EVH |
566 | /* marshall the data */ |
567 | p9pdu_prepare(req->tc, tag, type); | |
568 | va_start(ap, fmt); | |
342fee1d | 569 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
51a87c55 EVH |
570 | va_end(ap); |
571 | p9pdu_finalize(req->tc); | |
91b8534f EVH |
572 | |
573 | err = c->trans_mod->request(c, req); | |
574 | if (err < 0) { | |
575 | c->status = Disconnected; | |
576 | goto reterr; | |
577 | } | |
578 | ||
51a87c55 | 579 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
91b8534f EVH |
580 | err = wait_event_interruptible(*req->wq, |
581 | req->status >= REQ_STATUS_RCVD); | |
1bab88b2 LI |
582 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
583 | req->wq, tag, err); | |
91b8534f EVH |
584 | |
585 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 586 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 587 | err = req->t_err; |
91b8534f EVH |
588 | } |
589 | ||
1bab88b2 | 590 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
51a87c55 | 591 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 592 | sigpending = 1; |
91b8534f EVH |
593 | clear_thread_flag(TIF_SIGPENDING); |
594 | ||
1bab88b2 LI |
595 | if (c->trans_mod->cancel(c, req)) |
596 | p9_client_flush(c, req); | |
597 | ||
598 | /* if we received the response anyway, don't signal error */ | |
599 | if (req->status == REQ_STATUS_RCVD) | |
600 | err = 0; | |
91b8534f EVH |
601 | } |
602 | ||
603 | if (sigpending) { | |
604 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
605 | recalc_sigpending(); | |
606 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
607 | } | |
608 | ||
609 | if (err < 0) | |
610 | goto reterr; | |
611 | ||
51a87c55 EVH |
612 | err = p9_check_errors(c, req); |
613 | if (!err) { | |
614 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
615 | return req; | |
91b8534f EVH |
616 | } |
617 | ||
91b8534f | 618 | reterr: |
51a87c55 EVH |
619 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
620 | err); | |
91b8534f | 621 | p9_free_req(c, req); |
51a87c55 | 622 | return ERR_PTR(err); |
91b8534f EVH |
623 | } |
624 | ||
5503ac56 EVH |
625 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
626 | { | |
9f3e9bbe | 627 | int ret; |
5503ac56 | 628 | struct p9_fid *fid; |
cac23d65 | 629 | unsigned long flags; |
5503ac56 | 630 | |
51a87c55 | 631 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
632 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
633 | if (!fid) | |
634 | return ERR_PTR(-ENOMEM); | |
635 | ||
9f3e9bbe | 636 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 637 | if (ret < 0) { |
9f3e9bbe | 638 | ret = -ENOSPC; |
5503ac56 EVH |
639 | goto error; |
640 | } | |
9f3e9bbe | 641 | fid->fid = ret; |
5503ac56 EVH |
642 | |
643 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
644 | fid->mode = -1; | |
f8b9d53a | 645 | fid->uid = current_fsuid(); |
5503ac56 | 646 | fid->clnt = clnt; |
3e2796a9 | 647 | fid->rdir = NULL; |
cac23d65 | 648 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 649 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 650 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
651 | |
652 | return fid; | |
653 | ||
654 | error: | |
655 | kfree(fid); | |
9f3e9bbe | 656 | return ERR_PTR(ret); |
5503ac56 EVH |
657 | } |
658 | ||
659 | static void p9_fid_destroy(struct p9_fid *fid) | |
660 | { | |
661 | struct p9_client *clnt; | |
cac23d65 | 662 | unsigned long flags; |
5503ac56 | 663 | |
51a87c55 | 664 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
665 | clnt = fid->clnt; |
666 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 667 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 668 | list_del(&fid->flist); |
cac23d65 | 669 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 670 | kfree(fid->rdir); |
5503ac56 EVH |
671 | kfree(fid); |
672 | } | |
8a0dc95f | 673 | |
51a87c55 | 674 | int p9_client_version(struct p9_client *c) |
bd238fb4 | 675 | { |
6936bf60 | 676 | int err = 0; |
51a87c55 EVH |
677 | struct p9_req_t *req; |
678 | char *version; | |
679 | int msize; | |
bd238fb4 | 680 | |
342fee1d SK |
681 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
682 | c->msize, c->proto_version); | |
c5a7697d SK |
683 | |
684 | switch (c->proto_version) { | |
45bc21ed | 685 | case p9_proto_2000L: |
c5a7697d | 686 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 687 | c->msize, "9P2000.L"); |
c5a7697d SK |
688 | break; |
689 | case p9_proto_2000u: | |
690 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
691 | c->msize, "9P2000.u"); | |
692 | break; | |
693 | case p9_proto_legacy: | |
694 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
695 | c->msize, "9P2000"); | |
696 | break; | |
697 | default: | |
698 | return -EINVAL; | |
699 | break; | |
700 | } | |
701 | ||
51a87c55 EVH |
702 | if (IS_ERR(req)) |
703 | return PTR_ERR(req); | |
6936bf60 | 704 | |
342fee1d | 705 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 EVH |
706 | if (err) { |
707 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
e7f4b8f1 | 708 | p9pdu_dump(1, req->rc); |
6936bf60 | 709 | goto error; |
51a87c55 | 710 | } |
6936bf60 | 711 | |
51a87c55 | 712 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
713 | if (!strncmp(version, "9P2000.L", 8)) |
714 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 715 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
716 | c->proto_version = p9_proto_2000u; |
717 | else if (!strncmp(version, "9P2000", 6)) | |
718 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
719 | else { |
720 | err = -EREMOTEIO; | |
721 | goto error; | |
722 | } | |
723 | ||
51a87c55 EVH |
724 | if (msize < c->msize) |
725 | c->msize = msize; | |
6936bf60 EVH |
726 | |
727 | error: | |
51a87c55 EVH |
728 | kfree(version); |
729 | p9_free_req(c, req); | |
6936bf60 EVH |
730 | |
731 | return err; | |
732 | } | |
51a87c55 | 733 | EXPORT_SYMBOL(p9_client_version); |
6936bf60 EVH |
734 | |
735 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
736 | { | |
737 | int err; | |
738 | struct p9_client *clnt; | |
739 | ||
740 | err = 0; | |
bd238fb4 LI |
741 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
742 | if (!clnt) | |
743 | return ERR_PTR(-ENOMEM); | |
744 | ||
72029fe8 | 745 | clnt->trans_mod = NULL; |
bb8ffdfc | 746 | clnt->trans = NULL; |
bd238fb4 | 747 | spin_lock_init(&clnt->lock); |
bd238fb4 | 748 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 749 | |
fea511a6 EVH |
750 | p9_tag_init(clnt); |
751 | ||
bb8ffdfc EVH |
752 | err = parse_opts(options, clnt); |
753 | if (err < 0) | |
8781ff94 | 754 | goto free_client; |
bb8ffdfc | 755 | |
a17d1720 AK |
756 | if (!clnt->trans_mod) |
757 | clnt->trans_mod = v9fs_get_default_trans(); | |
758 | ||
8a0dc95f EVH |
759 | if (clnt->trans_mod == NULL) { |
760 | err = -EPROTONOSUPPORT; | |
761 | P9_DPRINTK(P9_DEBUG_ERROR, | |
762 | "No transport defined or default transport\n"); | |
8781ff94 EVH |
763 | goto free_client; |
764 | } | |
765 | ||
766 | clnt->fidpool = p9_idpool_create(); | |
767 | if (IS_ERR(clnt->fidpool)) { | |
768 | err = PTR_ERR(clnt->fidpool); | |
769 | clnt->fidpool = NULL; | |
770 | goto put_trans; | |
8a0dc95f EVH |
771 | } |
772 | ||
342fee1d SK |
773 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
774 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 775 | |
8b81ef58 EVH |
776 | err = clnt->trans_mod->create(clnt, dev_name, options); |
777 | if (err) | |
8781ff94 | 778 | goto destroy_fidpool; |
bd238fb4 | 779 | |
8a0dc95f EVH |
780 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
781 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
782 | ||
6936bf60 | 783 | err = p9_client_version(clnt); |
bd238fb4 | 784 | if (err) |
8781ff94 | 785 | goto close_trans; |
bd238fb4 | 786 | |
bd238fb4 LI |
787 | return clnt; |
788 | ||
8781ff94 EVH |
789 | close_trans: |
790 | clnt->trans_mod->close(clnt); | |
791 | destroy_fidpool: | |
792 | p9_idpool_destroy(clnt->fidpool); | |
793 | put_trans: | |
794 | v9fs_put_trans(clnt->trans_mod); | |
795 | free_client: | |
796 | kfree(clnt); | |
bd238fb4 LI |
797 | return ERR_PTR(err); |
798 | } | |
799 | EXPORT_SYMBOL(p9_client_create); | |
800 | ||
801 | void p9_client_destroy(struct p9_client *clnt) | |
802 | { | |
803 | struct p9_fid *fid, *fidptr; | |
804 | ||
51a87c55 | 805 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 806 | |
8b81ef58 EVH |
807 | if (clnt->trans_mod) |
808 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 809 | |
72029fe8 TH |
810 | v9fs_put_trans(clnt->trans_mod); |
811 | ||
6d96d3ab AK |
812 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
813 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); | |
bd238fb4 | 814 | p9_fid_destroy(fid); |
6d96d3ab | 815 | } |
bd238fb4 | 816 | |
0af8887e EVH |
817 | if (clnt->fidpool) |
818 | p9_idpool_destroy(clnt->fidpool); | |
819 | ||
fea511a6 EVH |
820 | p9_tag_cleanup(clnt); |
821 | ||
bd238fb4 LI |
822 | kfree(clnt); |
823 | } | |
824 | EXPORT_SYMBOL(p9_client_destroy); | |
825 | ||
826 | void p9_client_disconnect(struct p9_client *clnt) | |
827 | { | |
828 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 829 | clnt->status = Disconnected; |
bd238fb4 LI |
830 | } |
831 | EXPORT_SYMBOL(p9_client_disconnect); | |
832 | ||
6d96d3ab AK |
833 | void p9_client_begin_disconnect(struct p9_client *clnt) |
834 | { | |
835 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
836 | clnt->status = BeginDisconnect; | |
837 | } | |
838 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
839 | ||
bd238fb4 | 840 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
ba17674f | 841 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
842 | { |
843 | int err; | |
51a87c55 | 844 | struct p9_req_t *req; |
bd238fb4 | 845 | struct p9_fid *fid; |
51a87c55 | 846 | struct p9_qid qid; |
bd238fb4 | 847 | |
51a87c55 EVH |
848 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
849 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 850 | err = 0; |
bd238fb4 LI |
851 | |
852 | fid = p9_fid_create(clnt); | |
853 | if (IS_ERR(fid)) { | |
854 | err = PTR_ERR(fid); | |
855 | fid = NULL; | |
856 | goto error; | |
857 | } | |
858 | ||
51a87c55 EVH |
859 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
860 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
861 | if (IS_ERR(req)) { | |
862 | err = PTR_ERR(req); | |
bd238fb4 LI |
863 | goto error; |
864 | } | |
865 | ||
342fee1d | 866 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 867 | if (err) { |
e7f4b8f1 | 868 | p9pdu_dump(1, req->rc); |
51a87c55 | 869 | p9_free_req(clnt, req); |
bd238fb4 | 870 | goto error; |
51a87c55 | 871 | } |
bd238fb4 | 872 | |
51a87c55 | 873 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
874 | qid.type, |
875 | (unsigned long long)qid.path, | |
876 | qid.version); | |
51a87c55 EVH |
877 | |
878 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
879 | ||
880 | p9_free_req(clnt, req); | |
bd238fb4 LI |
881 | return fid; |
882 | ||
883 | error: | |
bd238fb4 LI |
884 | if (fid) |
885 | p9_fid_destroy(fid); | |
886 | return ERR_PTR(err); | |
887 | } | |
888 | EXPORT_SYMBOL(p9_client_attach); | |
889 | ||
51a87c55 EVH |
890 | struct p9_fid * |
891 | p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) | |
bd238fb4 LI |
892 | { |
893 | int err; | |
51a87c55 EVH |
894 | struct p9_req_t *req; |
895 | struct p9_qid qid; | |
896 | struct p9_fid *afid; | |
bd238fb4 | 897 | |
51a87c55 | 898 | P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); |
bd238fb4 | 899 | err = 0; |
bd238fb4 | 900 | |
51a87c55 EVH |
901 | afid = p9_fid_create(clnt); |
902 | if (IS_ERR(afid)) { | |
903 | err = PTR_ERR(afid); | |
904 | afid = NULL; | |
bd238fb4 LI |
905 | goto error; |
906 | } | |
907 | ||
51a87c55 EVH |
908 | req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", |
909 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
910 | if (IS_ERR(req)) { | |
911 | err = PTR_ERR(req); | |
bd238fb4 LI |
912 | goto error; |
913 | } | |
914 | ||
342fee1d | 915 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 916 | if (err) { |
e7f4b8f1 | 917 | p9pdu_dump(1, req->rc); |
51a87c55 | 918 | p9_free_req(clnt, req); |
bd238fb4 | 919 | goto error; |
51a87c55 | 920 | } |
bd238fb4 | 921 | |
51a87c55 | 922 | P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", |
b0d5fdef RD |
923 | qid.type, |
924 | (unsigned long long)qid.path, | |
925 | qid.version); | |
51a87c55 EVH |
926 | |
927 | memmove(&afid->qid, &qid, sizeof(struct p9_qid)); | |
928 | p9_free_req(clnt, req); | |
929 | return afid; | |
bd238fb4 LI |
930 | |
931 | error: | |
51a87c55 EVH |
932 | if (afid) |
933 | p9_fid_destroy(afid); | |
bd238fb4 LI |
934 | return ERR_PTR(err); |
935 | } | |
936 | EXPORT_SYMBOL(p9_client_auth); | |
937 | ||
938 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, | |
939 | int clone) | |
940 | { | |
941 | int err; | |
bd238fb4 LI |
942 | struct p9_client *clnt; |
943 | struct p9_fid *fid; | |
51a87c55 EVH |
944 | struct p9_qid *wqids; |
945 | struct p9_req_t *req; | |
946 | int16_t nwqids, count; | |
bd238fb4 | 947 | |
bd238fb4 | 948 | err = 0; |
62b2be59 | 949 | wqids = NULL; |
bd238fb4 LI |
950 | clnt = oldfid->clnt; |
951 | if (clone) { | |
952 | fid = p9_fid_create(clnt); | |
953 | if (IS_ERR(fid)) { | |
954 | err = PTR_ERR(fid); | |
955 | fid = NULL; | |
956 | goto error; | |
957 | } | |
958 | ||
959 | fid->uid = oldfid->uid; | |
960 | } else | |
961 | fid = oldfid; | |
962 | ||
51a87c55 EVH |
963 | |
964 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
965 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
966 | ||
967 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
968 | nwname, wnames); | |
969 | if (IS_ERR(req)) { | |
970 | err = PTR_ERR(req); | |
bd238fb4 LI |
971 | goto error; |
972 | } | |
973 | ||
342fee1d | 974 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 EVH |
975 | if (err) { |
976 | p9pdu_dump(1, req->rc); | |
977 | p9_free_req(clnt, req); | |
51a87c55 | 978 | goto clunk_fid; |
e7f4b8f1 EVH |
979 | } |
980 | p9_free_req(clnt, req); | |
bd238fb4 | 981 | |
51a87c55 EVH |
982 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
983 | ||
984 | if (nwqids != nwname) { | |
bd238fb4 LI |
985 | err = -ENOENT; |
986 | goto clunk_fid; | |
987 | } | |
988 | ||
51a87c55 EVH |
989 | for (count = 0; count < nwqids; count++) |
990 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
991 | count, wqids[count].type, |
992 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
993 | wqids[count].version); |
994 | ||
bd238fb4 | 995 | if (nwname) |
51a87c55 | 996 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
997 | else |
998 | fid->qid = oldfid->qid; | |
999 | ||
62b2be59 | 1000 | kfree(wqids); |
bd238fb4 LI |
1001 | return fid; |
1002 | ||
1003 | clunk_fid: | |
62b2be59 | 1004 | kfree(wqids); |
51a87c55 EVH |
1005 | p9_client_clunk(fid); |
1006 | fid = NULL; | |
bd238fb4 LI |
1007 | |
1008 | error: | |
bd238fb4 LI |
1009 | if (fid && (fid != oldfid)) |
1010 | p9_fid_destroy(fid); | |
1011 | ||
1012 | return ERR_PTR(err); | |
1013 | } | |
1014 | EXPORT_SYMBOL(p9_client_walk); | |
1015 | ||
1016 | int p9_client_open(struct p9_fid *fid, int mode) | |
1017 | { | |
1018 | int err; | |
bd238fb4 | 1019 | struct p9_client *clnt; |
51a87c55 EVH |
1020 | struct p9_req_t *req; |
1021 | struct p9_qid qid; | |
1022 | int iounit; | |
bd238fb4 | 1023 | |
bd238fb4 | 1024 | clnt = fid->clnt; |
ef56547e MK |
1025 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
1026 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); | |
1027 | err = 0; | |
bd238fb4 LI |
1028 | |
1029 | if (fid->mode != -1) | |
1030 | return -EINVAL; | |
1031 | ||
ef56547e MK |
1032 | if (p9_is_proto_dotl(clnt)) |
1033 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1034 | else | |
1035 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1036 | if (IS_ERR(req)) { |
1037 | err = PTR_ERR(req); | |
1038 | goto error; | |
bd238fb4 LI |
1039 | } |
1040 | ||
342fee1d | 1041 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1042 | if (err) { |
1043 | p9pdu_dump(1, req->rc); | |
1044 | goto free_and_error; | |
1045 | } | |
51a87c55 | 1046 | |
ef56547e MK |
1047 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
1048 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, | |
1049 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1050 | |
1051 | fid->mode = mode; | |
51a87c55 | 1052 | fid->iounit = iounit; |
bd238fb4 | 1053 | |
e7f4b8f1 EVH |
1054 | free_and_error: |
1055 | p9_free_req(clnt, req); | |
51a87c55 | 1056 | error: |
bd238fb4 LI |
1057 | return err; |
1058 | } | |
1059 | EXPORT_SYMBOL(p9_client_open); | |
1060 | ||
5643135a VJJ |
1061 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
1062 | gid_t gid, struct p9_qid *qid) | |
1063 | { | |
1064 | int err = 0; | |
1065 | struct p9_client *clnt; | |
1066 | struct p9_req_t *req; | |
1067 | int iounit; | |
1068 | ||
1069 | P9_DPRINTK(P9_DEBUG_9P, | |
1070 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", | |
1071 | ofid->fid, name, flags, mode, gid); | |
1072 | clnt = ofid->clnt; | |
1073 | ||
1074 | if (ofid->mode != -1) | |
1075 | return -EINVAL; | |
1076 | ||
1077 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, | |
1078 | mode, gid); | |
1079 | if (IS_ERR(req)) { | |
1080 | err = PTR_ERR(req); | |
1081 | goto error; | |
1082 | } | |
1083 | ||
1084 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1085 | if (err) { | |
1086 | p9pdu_dump(1, req->rc); | |
1087 | goto free_and_error; | |
1088 | } | |
1089 | ||
1090 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", | |
1091 | qid->type, | |
1092 | (unsigned long long)qid->path, | |
1093 | qid->version, iounit); | |
1094 | ||
1095 | ofid->mode = mode; | |
1096 | ofid->iounit = iounit; | |
1097 | ||
1098 | free_and_error: | |
1099 | p9_free_req(clnt, req); | |
1100 | error: | |
1101 | return err; | |
1102 | } | |
1103 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1104 | ||
bd238fb4 LI |
1105 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1106 | char *extension) | |
1107 | { | |
1108 | int err; | |
bd238fb4 | 1109 | struct p9_client *clnt; |
51a87c55 EVH |
1110 | struct p9_req_t *req; |
1111 | struct p9_qid qid; | |
1112 | int iounit; | |
bd238fb4 | 1113 | |
51a87c55 EVH |
1114 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1115 | fid->fid, name, perm, mode); | |
bd238fb4 | 1116 | err = 0; |
bd238fb4 LI |
1117 | clnt = fid->clnt; |
1118 | ||
1119 | if (fid->mode != -1) | |
1120 | return -EINVAL; | |
1121 | ||
51a87c55 EVH |
1122 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1123 | mode, extension); | |
1124 | if (IS_ERR(req)) { | |
1125 | err = PTR_ERR(req); | |
1126 | goto error; | |
bd238fb4 LI |
1127 | } |
1128 | ||
342fee1d | 1129 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1130 | if (err) { |
1131 | p9pdu_dump(1, req->rc); | |
1132 | goto free_and_error; | |
1133 | } | |
51a87c55 EVH |
1134 | |
1135 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1136 | qid.type, |
1137 | (unsigned long long)qid.path, | |
1138 | qid.version, iounit); | |
bd238fb4 LI |
1139 | |
1140 | fid->mode = mode; | |
51a87c55 | 1141 | fid->iounit = iounit; |
bd238fb4 | 1142 | |
e7f4b8f1 EVH |
1143 | free_and_error: |
1144 | p9_free_req(clnt, req); | |
51a87c55 | 1145 | error: |
bd238fb4 LI |
1146 | return err; |
1147 | } | |
1148 | EXPORT_SYMBOL(p9_client_fcreate); | |
1149 | ||
50cc42ff VJJ |
1150 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
1151 | struct p9_qid *qid) | |
1152 | { | |
1153 | int err = 0; | |
1154 | struct p9_client *clnt; | |
1155 | struct p9_req_t *req; | |
1156 | ||
1157 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", | |
1158 | dfid->fid, name, symtgt); | |
1159 | clnt = dfid->clnt; | |
1160 | ||
1161 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, | |
1162 | gid); | |
1163 | if (IS_ERR(req)) { | |
1164 | err = PTR_ERR(req); | |
1165 | goto error; | |
1166 | } | |
1167 | ||
1168 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1169 | if (err) { | |
1170 | p9pdu_dump(1, req->rc); | |
1171 | goto free_and_error; | |
1172 | } | |
1173 | ||
1174 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", | |
1175 | qid->type, (unsigned long long)qid->path, qid->version); | |
1176 | ||
1177 | free_and_error: | |
1178 | p9_free_req(clnt, req); | |
1179 | error: | |
1180 | return err; | |
1181 | } | |
1182 | EXPORT_SYMBOL(p9_client_symlink); | |
1183 | ||
652df9a7 VJJ |
1184 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1185 | { | |
1186 | struct p9_client *clnt; | |
1187 | struct p9_req_t *req; | |
1188 | ||
1189 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", | |
1190 | dfid->fid, oldfid->fid, newname); | |
1191 | clnt = dfid->clnt; | |
1192 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1193 | newname); | |
1194 | if (IS_ERR(req)) | |
1195 | return PTR_ERR(req); | |
1196 | ||
1197 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); | |
1198 | p9_free_req(clnt, req); | |
1199 | return 0; | |
1200 | } | |
1201 | EXPORT_SYMBOL(p9_client_link); | |
1202 | ||
bd238fb4 LI |
1203 | int p9_client_clunk(struct p9_fid *fid) |
1204 | { | |
1205 | int err; | |
bd238fb4 | 1206 | struct p9_client *clnt; |
51a87c55 | 1207 | struct p9_req_t *req; |
bd238fb4 | 1208 | |
51a87c55 | 1209 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1210 | err = 0; |
bd238fb4 LI |
1211 | clnt = fid->clnt; |
1212 | ||
51a87c55 EVH |
1213 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1214 | if (IS_ERR(req)) { | |
1215 | err = PTR_ERR(req); | |
1216 | goto error; | |
bd238fb4 LI |
1217 | } |
1218 | ||
51a87c55 | 1219 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1220 | |
51a87c55 | 1221 | p9_free_req(clnt, req); |
bd238fb4 LI |
1222 | p9_fid_destroy(fid); |
1223 | ||
51a87c55 | 1224 | error: |
bd238fb4 LI |
1225 | return err; |
1226 | } | |
1227 | EXPORT_SYMBOL(p9_client_clunk); | |
1228 | ||
1229 | int p9_client_remove(struct p9_fid *fid) | |
1230 | { | |
1231 | int err; | |
bd238fb4 | 1232 | struct p9_client *clnt; |
51a87c55 | 1233 | struct p9_req_t *req; |
bd238fb4 | 1234 | |
51a87c55 | 1235 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1236 | err = 0; |
bd238fb4 LI |
1237 | clnt = fid->clnt; |
1238 | ||
51a87c55 EVH |
1239 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1240 | if (IS_ERR(req)) { | |
1241 | err = PTR_ERR(req); | |
1242 | goto error; | |
bd238fb4 LI |
1243 | } |
1244 | ||
51a87c55 | 1245 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1246 | |
51a87c55 | 1247 | p9_free_req(clnt, req); |
51a87c55 | 1248 | error: |
0b1208b1 | 1249 | p9_fid_destroy(fid); |
bd238fb4 LI |
1250 | return err; |
1251 | } | |
1252 | EXPORT_SYMBOL(p9_client_remove); | |
1253 | ||
0fc9655e EVH |
1254 | int |
1255 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1256 | u32 count) | |
bd238fb4 | 1257 | { |
51a87c55 | 1258 | int err, rsize, total; |
bd238fb4 | 1259 | struct p9_client *clnt; |
51a87c55 EVH |
1260 | struct p9_req_t *req; |
1261 | char *dataptr; | |
bd238fb4 | 1262 | |
51a87c55 | 1263 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
bd238fb4 LI |
1264 | (long long unsigned) offset, count); |
1265 | err = 0; | |
bd238fb4 LI |
1266 | clnt = fid->clnt; |
1267 | total = 0; | |
1268 | ||
1269 | rsize = fid->iounit; | |
1270 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1271 | rsize = clnt->msize - P9_IOHDRSZ; | |
1272 | ||
51a87c55 EVH |
1273 | if (count < rsize) |
1274 | rsize = count; | |
bd238fb4 | 1275 | |
51a87c55 EVH |
1276 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1277 | if (IS_ERR(req)) { | |
1278 | err = PTR_ERR(req); | |
1279 | goto error; | |
1280 | } | |
bd238fb4 | 1281 | |
342fee1d | 1282 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 EVH |
1283 | if (err) { |
1284 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1285 | goto free_and_error; |
e7f4b8f1 | 1286 | } |
bd238fb4 | 1287 | |
51a87c55 | 1288 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1289 | |
51a87c55 EVH |
1290 | if (data) { |
1291 | memmove(data, dataptr, count); | |
51a87c55 | 1292 | } |
bd238fb4 | 1293 | |
51a87c55 EVH |
1294 | if (udata) { |
1295 | err = copy_to_user(udata, dataptr, count); | |
1296 | if (err) { | |
1297 | err = -EFAULT; | |
1298 | goto free_and_error; | |
bd238fb4 | 1299 | } |
51a87c55 | 1300 | } |
bd238fb4 | 1301 | |
51a87c55 EVH |
1302 | p9_free_req(clnt, req); |
1303 | return count; | |
bd238fb4 | 1304 | |
51a87c55 EVH |
1305 | free_and_error: |
1306 | p9_free_req(clnt, req); | |
bd238fb4 | 1307 | error: |
bd238fb4 LI |
1308 | return err; |
1309 | } | |
0fc9655e | 1310 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1311 | |
1312 | int | |
0fc9655e EVH |
1313 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1314 | u64 offset, u32 count) | |
bd238fb4 | 1315 | { |
51a87c55 | 1316 | int err, rsize, total; |
bd238fb4 | 1317 | struct p9_client *clnt; |
51a87c55 | 1318 | struct p9_req_t *req; |
bd238fb4 | 1319 | |
51a87c55 EVH |
1320 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1321 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1322 | err = 0; |
bd238fb4 LI |
1323 | clnt = fid->clnt; |
1324 | total = 0; | |
1325 | ||
1326 | rsize = fid->iounit; | |
1327 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1328 | rsize = clnt->msize - P9_IOHDRSZ; | |
1329 | ||
51a87c55 EVH |
1330 | if (count < rsize) |
1331 | rsize = count; | |
1332 | if (data) | |
1333 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1334 | rsize, data); | |
1335 | else | |
1336 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1337 | rsize, udata); | |
1338 | if (IS_ERR(req)) { | |
1339 | err = PTR_ERR(req); | |
1340 | goto error; | |
1341 | } | |
0fc9655e | 1342 | |
342fee1d | 1343 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 EVH |
1344 | if (err) { |
1345 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1346 | goto free_and_error; |
e7f4b8f1 EVH |
1347 | } |
1348 | ||
51a87c55 | 1349 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1350 | |
51a87c55 EVH |
1351 | p9_free_req(clnt, req); |
1352 | return count; | |
bd238fb4 | 1353 | |
51a87c55 EVH |
1354 | free_and_error: |
1355 | p9_free_req(clnt, req); | |
bd238fb4 | 1356 | error: |
bd238fb4 LI |
1357 | return err; |
1358 | } | |
0fc9655e | 1359 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1360 | |
51a87c55 | 1361 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1362 | { |
51a87c55 EVH |
1363 | int err; |
1364 | struct p9_client *clnt; | |
1365 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1366 | struct p9_req_t *req; | |
1367 | u16 ignored; | |
5503ac56 | 1368 | |
51a87c55 | 1369 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1370 | |
5503ac56 EVH |
1371 | if (!ret) |
1372 | return ERR_PTR(-ENOMEM); | |
1373 | ||
bd238fb4 | 1374 | err = 0; |
bd238fb4 LI |
1375 | clnt = fid->clnt; |
1376 | ||
51a87c55 EVH |
1377 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1378 | if (IS_ERR(req)) { | |
1379 | err = PTR_ERR(req); | |
bd238fb4 LI |
1380 | goto error; |
1381 | } | |
1382 | ||
342fee1d | 1383 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1384 | if (err) { |
e7f4b8f1 | 1385 | p9pdu_dump(1, req->rc); |
eedfe1c4 AK |
1386 | p9_free_req(clnt, req); |
1387 | goto error; | |
e7f4b8f1 | 1388 | } |
bd238fb4 | 1389 | |
51a87c55 | 1390 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1391 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1392 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1393 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1394 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1395 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1396 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1397 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1398 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1399 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1400 | |
742b11a7 LI |
1401 | p9_free_req(clnt, req); |
1402 | return ret; | |
1403 | ||
bd238fb4 | 1404 | error: |
742b11a7 LI |
1405 | kfree(ret); |
1406 | return ERR_PTR(err); | |
bd238fb4 LI |
1407 | } |
1408 | EXPORT_SYMBOL(p9_client_stat); | |
1409 | ||
f0853122 SK |
1410 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1411 | u64 request_mask) | |
1412 | { | |
1413 | int err; | |
1414 | struct p9_client *clnt; | |
1415 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1416 | GFP_KERNEL); | |
1417 | struct p9_req_t *req; | |
1418 | ||
1419 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", | |
1420 | fid->fid, request_mask); | |
1421 | ||
1422 | if (!ret) | |
1423 | return ERR_PTR(-ENOMEM); | |
1424 | ||
1425 | err = 0; | |
1426 | clnt = fid->clnt; | |
1427 | ||
1428 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1429 | if (IS_ERR(req)) { | |
1430 | err = PTR_ERR(req); | |
1431 | goto error; | |
1432 | } | |
1433 | ||
1434 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1435 | if (err) { | |
1436 | p9pdu_dump(1, req->rc); | |
1437 | p9_free_req(clnt, req); | |
1438 | goto error; | |
1439 | } | |
1440 | ||
1441 | P9_DPRINTK(P9_DEBUG_9P, | |
1442 | "<<< RGETATTR st_result_mask=%lld\n" | |
1443 | "<<< qid=%x.%llx.%x\n" | |
1444 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1445 | "<<< st_uid=%d st_gid=%d\n" | |
1446 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1447 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1448 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1449 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1450 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1451 | "<<< st_gen=%lld st_data_version=%lld", | |
1452 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
1453 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, | |
1454 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, | |
1455 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, | |
1456 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1457 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1458 | ret->st_gen, ret->st_data_version); | |
1459 | ||
1460 | p9_free_req(clnt, req); | |
1461 | return ret; | |
1462 | ||
1463 | error: | |
1464 | kfree(ret); | |
1465 | return ERR_PTR(err); | |
1466 | } | |
1467 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1468 | ||
342fee1d | 1469 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1470 | { |
1471 | int ret; | |
1472 | ||
9d6939da | 1473 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1474 | /* size[2] type[2] dev[4] qid[13] */ |
1475 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1476 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1477 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1478 | |
1479 | if (wst->name) | |
1480 | ret += strlen(wst->name); | |
1481 | if (wst->uid) | |
1482 | ret += strlen(wst->uid); | |
1483 | if (wst->gid) | |
1484 | ret += strlen(wst->gid); | |
1485 | if (wst->muid) | |
1486 | ret += strlen(wst->muid); | |
1487 | ||
c56e4acf SK |
1488 | if ((proto_version == p9_proto_2000u) || |
1489 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1490 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1491 | if (wst->extension) | |
1492 | ret += strlen(wst->extension); | |
1493 | } | |
1494 | ||
1495 | return ret; | |
1496 | } | |
1497 | ||
bd238fb4 LI |
1498 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1499 | { | |
1500 | int err; | |
51a87c55 | 1501 | struct p9_req_t *req; |
bd238fb4 LI |
1502 | struct p9_client *clnt; |
1503 | ||
453ed90d LI |
1504 | err = 0; |
1505 | clnt = fid->clnt; | |
342fee1d | 1506 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
51a87c55 | 1507 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1508 | P9_DPRINTK(P9_DEBUG_9P, |
1509 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1510 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1511 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1512 | " uid=%d gid=%d n_muid=%d\n", | |
1513 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1514 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1515 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1516 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1517 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1518 | |
9d6939da | 1519 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1520 | if (IS_ERR(req)) { |
1521 | err = PTR_ERR(req); | |
1522 | goto error; | |
bd238fb4 LI |
1523 | } |
1524 | ||
51a87c55 | 1525 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1526 | |
51a87c55 EVH |
1527 | p9_free_req(clnt, req); |
1528 | error: | |
bd238fb4 LI |
1529 | return err; |
1530 | } | |
1531 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1532 | |
87d7845a SK |
1533 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1534 | { | |
1535 | int err; | |
1536 | struct p9_req_t *req; | |
1537 | struct p9_client *clnt; | |
1538 | ||
1539 | err = 0; | |
1540 | clnt = fid->clnt; | |
1541 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); | |
1542 | P9_DPRINTK(P9_DEBUG_9P, | |
1543 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" | |
1544 | " atime_sec=%lld atime_nsec=%lld\n" | |
1545 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
1546 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, | |
1547 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, | |
1548 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1549 | ||
1550 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1551 | ||
1552 | if (IS_ERR(req)) { | |
1553 | err = PTR_ERR(req); | |
1554 | goto error; | |
1555 | } | |
1556 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); | |
1557 | p9_free_req(clnt, req); | |
1558 | error: | |
1559 | return err; | |
1560 | } | |
1561 | EXPORT_SYMBOL(p9_client_setattr); | |
1562 | ||
bda8e775 SK |
1563 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1564 | { | |
1565 | int err; | |
1566 | struct p9_req_t *req; | |
1567 | struct p9_client *clnt; | |
1568 | ||
1569 | err = 0; | |
1570 | clnt = fid->clnt; | |
1571 | ||
1572 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); | |
1573 | ||
1574 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1575 | if (IS_ERR(req)) { | |
1576 | err = PTR_ERR(req); | |
1577 | goto error; | |
1578 | } | |
1579 | ||
1580 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1581 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1582 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1583 | if (err) { | |
1584 | p9pdu_dump(1, req->rc); | |
1585 | p9_free_req(clnt, req); | |
1586 | goto error; | |
1587 | } | |
1588 | ||
1589 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " | |
1590 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " | |
1591 | "fsid %llu namelen %ld\n", | |
1592 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1593 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1594 | sb->fsid, (long int)sb->namelen); | |
1595 | ||
1596 | p9_free_req(clnt, req); | |
1597 | error: | |
1598 | return err; | |
1599 | } | |
1600 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda SK |
1601 | |
1602 | int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) | |
1603 | { | |
1604 | int err; | |
1605 | struct p9_req_t *req; | |
1606 | struct p9_client *clnt; | |
1607 | ||
1608 | err = 0; | |
1609 | clnt = fid->clnt; | |
1610 | ||
1611 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", | |
1612 | fid->fid, newdirfid->fid, name); | |
1613 | ||
1614 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1615 | newdirfid->fid, name); | |
1616 | if (IS_ERR(req)) { | |
1617 | err = PTR_ERR(req); | |
1618 | goto error; | |
1619 | } | |
1620 | ||
1621 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); | |
1622 | ||
1623 | p9_free_req(clnt, req); | |
1624 | error: | |
1625 | return err; | |
1626 | } | |
1627 | EXPORT_SYMBOL(p9_client_rename); | |
1628 | ||
0ef63f34 AK |
1629 | /* |
1630 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1631 | */ | |
1632 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1633 | const char *attr_name, u64 *attr_size) | |
1634 | { | |
1635 | int err; | |
1636 | struct p9_req_t *req; | |
1637 | struct p9_client *clnt; | |
1638 | struct p9_fid *attr_fid; | |
1639 | ||
1640 | err = 0; | |
1641 | clnt = file_fid->clnt; | |
1642 | attr_fid = p9_fid_create(clnt); | |
1643 | if (IS_ERR(attr_fid)) { | |
1644 | err = PTR_ERR(attr_fid); | |
1645 | attr_fid = NULL; | |
1646 | goto error; | |
1647 | } | |
1648 | P9_DPRINTK(P9_DEBUG_9P, | |
1649 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", | |
1650 | file_fid->fid, attr_fid->fid, attr_name); | |
1651 | ||
1652 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1653 | file_fid->fid, attr_fid->fid, attr_name); | |
1654 | if (IS_ERR(req)) { | |
1655 | err = PTR_ERR(req); | |
1656 | goto error; | |
1657 | } | |
1658 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
1659 | if (err) { | |
1660 | p9pdu_dump(1, req->rc); | |
1661 | p9_free_req(clnt, req); | |
1662 | goto clunk_fid; | |
1663 | } | |
1664 | p9_free_req(clnt, req); | |
1665 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", | |
1666 | attr_fid->fid, *attr_size); | |
1667 | return attr_fid; | |
1668 | clunk_fid: | |
1669 | p9_client_clunk(attr_fid); | |
1670 | attr_fid = NULL; | |
1671 | error: | |
1672 | if (attr_fid && (attr_fid != file_fid)) | |
1673 | p9_fid_destroy(attr_fid); | |
1674 | ||
1675 | return ERR_PTR(err); | |
1676 | } | |
1677 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
1678 | ||
eda25e46 AK |
1679 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
1680 | u64 attr_size, int flags) | |
1681 | { | |
1682 | int err; | |
1683 | struct p9_req_t *req; | |
1684 | struct p9_client *clnt; | |
1685 | ||
1686 | P9_DPRINTK(P9_DEBUG_9P, | |
1687 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", | |
1688 | fid->fid, name, (long long)attr_size, flags); | |
1689 | err = 0; | |
1690 | clnt = fid->clnt; | |
1691 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
1692 | fid->fid, name, attr_size, flags); | |
1693 | if (IS_ERR(req)) { | |
1694 | err = PTR_ERR(req); | |
1695 | goto error; | |
1696 | } | |
1697 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); | |
1698 | p9_free_req(clnt, req); | |
1699 | error: | |
1700 | return err; | |
1701 | } | |
1702 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
1703 | ||
7751bdb3 SK |
1704 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
1705 | { | |
1706 | int err, rsize, total; | |
1707 | struct p9_client *clnt; | |
1708 | struct p9_req_t *req; | |
1709 | char *dataptr; | |
1710 | ||
1711 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", | |
1712 | fid->fid, (long long unsigned) offset, count); | |
1713 | ||
1714 | err = 0; | |
1715 | clnt = fid->clnt; | |
1716 | total = 0; | |
1717 | ||
1718 | rsize = fid->iounit; | |
1719 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
1720 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
1721 | ||
1722 | if (count < rsize) | |
1723 | rsize = count; | |
1724 | ||
1725 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); | |
1726 | if (IS_ERR(req)) { | |
1727 | err = PTR_ERR(req); | |
1728 | goto error; | |
1729 | } | |
1730 | ||
1731 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
1732 | if (err) { | |
1733 | p9pdu_dump(1, req->rc); | |
1734 | goto free_and_error; | |
1735 | } | |
1736 | ||
1737 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); | |
1738 | ||
1739 | if (data) | |
1740 | memmove(data, dataptr, count); | |
1741 | ||
1742 | p9_free_req(clnt, req); | |
1743 | return count; | |
1744 | ||
1745 | free_and_error: | |
1746 | p9_free_req(clnt, req); | |
1747 | error: | |
1748 | return err; | |
1749 | } | |
1750 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
1751 | |
1752 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
1753 | dev_t rdev, gid_t gid, struct p9_qid *qid) | |
1754 | { | |
1755 | int err; | |
1756 | struct p9_client *clnt; | |
1757 | struct p9_req_t *req; | |
1758 | ||
1759 | err = 0; | |
1760 | clnt = fid->clnt; | |
1761 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " | |
1762 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); | |
1763 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, | |
1764 | MAJOR(rdev), MINOR(rdev), gid); | |
1765 | if (IS_ERR(req)) | |
1766 | return PTR_ERR(req); | |
1767 | ||
1768 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1769 | if (err) { | |
1770 | p9pdu_dump(1, req->rc); | |
1771 | goto error; | |
1772 | } | |
1773 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, | |
1774 | (unsigned long long)qid->path, qid->version); | |
1775 | ||
1776 | error: | |
1777 | p9_free_req(clnt, req); | |
1778 | return err; | |
1779 | ||
1780 | } | |
1781 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
1782 | |
1783 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
1784 | gid_t gid, struct p9_qid *qid) | |
1785 | { | |
1786 | int err; | |
1787 | struct p9_client *clnt; | |
1788 | struct p9_req_t *req; | |
1789 | ||
1790 | err = 0; | |
1791 | clnt = fid->clnt; | |
1792 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", | |
1793 | fid->fid, name, mode, gid); | |
1794 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, | |
1795 | gid); | |
1796 | if (IS_ERR(req)) | |
1797 | return PTR_ERR(req); | |
1798 | ||
1799 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1800 | if (err) { | |
1801 | p9pdu_dump(1, req->rc); | |
1802 | goto error; | |
1803 | } | |
1804 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, | |
1805 | (unsigned long long)qid->path, qid->version); | |
1806 | ||
1807 | error: | |
1808 | p9_free_req(clnt, req); | |
1809 | return err; | |
1810 | ||
1811 | } | |
1812 | EXPORT_SYMBOL(p9_client_mkdir_dotl); |