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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 | |
32a875ad | 674 | static 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 | } | |
6936bf60 EVH |
733 | |
734 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
735 | { | |
736 | int err; | |
737 | struct p9_client *clnt; | |
738 | ||
739 | err = 0; | |
bd238fb4 LI |
740 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
741 | if (!clnt) | |
742 | return ERR_PTR(-ENOMEM); | |
743 | ||
72029fe8 | 744 | clnt->trans_mod = NULL; |
bb8ffdfc | 745 | clnt->trans = NULL; |
bd238fb4 | 746 | spin_lock_init(&clnt->lock); |
bd238fb4 | 747 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 748 | |
fea511a6 EVH |
749 | p9_tag_init(clnt); |
750 | ||
bb8ffdfc EVH |
751 | err = parse_opts(options, clnt); |
752 | if (err < 0) | |
8781ff94 | 753 | goto free_client; |
bb8ffdfc | 754 | |
a17d1720 AK |
755 | if (!clnt->trans_mod) |
756 | clnt->trans_mod = v9fs_get_default_trans(); | |
757 | ||
8a0dc95f EVH |
758 | if (clnt->trans_mod == NULL) { |
759 | err = -EPROTONOSUPPORT; | |
760 | P9_DPRINTK(P9_DEBUG_ERROR, | |
761 | "No transport defined or default transport\n"); | |
8781ff94 EVH |
762 | goto free_client; |
763 | } | |
764 | ||
765 | clnt->fidpool = p9_idpool_create(); | |
766 | if (IS_ERR(clnt->fidpool)) { | |
767 | err = PTR_ERR(clnt->fidpool); | |
768 | clnt->fidpool = NULL; | |
769 | goto put_trans; | |
8a0dc95f EVH |
770 | } |
771 | ||
342fee1d SK |
772 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
773 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 774 | |
8b81ef58 EVH |
775 | err = clnt->trans_mod->create(clnt, dev_name, options); |
776 | if (err) | |
8781ff94 | 777 | goto destroy_fidpool; |
bd238fb4 | 778 | |
8a0dc95f EVH |
779 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
780 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; | |
781 | ||
6936bf60 | 782 | err = p9_client_version(clnt); |
bd238fb4 | 783 | if (err) |
8781ff94 | 784 | goto close_trans; |
bd238fb4 | 785 | |
bd238fb4 LI |
786 | return clnt; |
787 | ||
8781ff94 EVH |
788 | close_trans: |
789 | clnt->trans_mod->close(clnt); | |
790 | destroy_fidpool: | |
791 | p9_idpool_destroy(clnt->fidpool); | |
792 | put_trans: | |
793 | v9fs_put_trans(clnt->trans_mod); | |
794 | free_client: | |
795 | kfree(clnt); | |
bd238fb4 LI |
796 | return ERR_PTR(err); |
797 | } | |
798 | EXPORT_SYMBOL(p9_client_create); | |
799 | ||
800 | void p9_client_destroy(struct p9_client *clnt) | |
801 | { | |
802 | struct p9_fid *fid, *fidptr; | |
803 | ||
51a87c55 | 804 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 805 | |
8b81ef58 EVH |
806 | if (clnt->trans_mod) |
807 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 808 | |
72029fe8 TH |
809 | v9fs_put_trans(clnt->trans_mod); |
810 | ||
6d96d3ab AK |
811 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
812 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); | |
bd238fb4 | 813 | p9_fid_destroy(fid); |
6d96d3ab | 814 | } |
bd238fb4 | 815 | |
0af8887e EVH |
816 | if (clnt->fidpool) |
817 | p9_idpool_destroy(clnt->fidpool); | |
818 | ||
fea511a6 EVH |
819 | p9_tag_cleanup(clnt); |
820 | ||
bd238fb4 LI |
821 | kfree(clnt); |
822 | } | |
823 | EXPORT_SYMBOL(p9_client_destroy); | |
824 | ||
825 | void p9_client_disconnect(struct p9_client *clnt) | |
826 | { | |
827 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 828 | clnt->status = Disconnected; |
bd238fb4 LI |
829 | } |
830 | EXPORT_SYMBOL(p9_client_disconnect); | |
831 | ||
6d96d3ab AK |
832 | void p9_client_begin_disconnect(struct p9_client *clnt) |
833 | { | |
834 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
835 | clnt->status = BeginDisconnect; | |
836 | } | |
837 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
838 | ||
bd238fb4 | 839 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
ba17674f | 840 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
841 | { |
842 | int err; | |
51a87c55 | 843 | struct p9_req_t *req; |
bd238fb4 | 844 | struct p9_fid *fid; |
51a87c55 | 845 | struct p9_qid qid; |
bd238fb4 | 846 | |
51a87c55 EVH |
847 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
848 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 849 | err = 0; |
bd238fb4 LI |
850 | |
851 | fid = p9_fid_create(clnt); | |
852 | if (IS_ERR(fid)) { | |
853 | err = PTR_ERR(fid); | |
854 | fid = NULL; | |
855 | goto error; | |
856 | } | |
857 | ||
51a87c55 EVH |
858 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
859 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
860 | if (IS_ERR(req)) { | |
861 | err = PTR_ERR(req); | |
bd238fb4 LI |
862 | goto error; |
863 | } | |
864 | ||
342fee1d | 865 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 866 | if (err) { |
e7f4b8f1 | 867 | p9pdu_dump(1, req->rc); |
51a87c55 | 868 | p9_free_req(clnt, req); |
bd238fb4 | 869 | goto error; |
51a87c55 | 870 | } |
bd238fb4 | 871 | |
51a87c55 | 872 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
873 | qid.type, |
874 | (unsigned long long)qid.path, | |
875 | qid.version); | |
51a87c55 EVH |
876 | |
877 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
878 | ||
879 | p9_free_req(clnt, req); | |
bd238fb4 LI |
880 | return fid; |
881 | ||
882 | error: | |
bd238fb4 LI |
883 | if (fid) |
884 | p9_fid_destroy(fid); | |
885 | return ERR_PTR(err); | |
886 | } | |
887 | EXPORT_SYMBOL(p9_client_attach); | |
888 | ||
bd238fb4 LI |
889 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, |
890 | int clone) | |
891 | { | |
892 | int err; | |
bd238fb4 LI |
893 | struct p9_client *clnt; |
894 | struct p9_fid *fid; | |
51a87c55 EVH |
895 | struct p9_qid *wqids; |
896 | struct p9_req_t *req; | |
897 | int16_t nwqids, count; | |
bd238fb4 | 898 | |
bd238fb4 | 899 | err = 0; |
62b2be59 | 900 | wqids = NULL; |
bd238fb4 LI |
901 | clnt = oldfid->clnt; |
902 | if (clone) { | |
903 | fid = p9_fid_create(clnt); | |
904 | if (IS_ERR(fid)) { | |
905 | err = PTR_ERR(fid); | |
906 | fid = NULL; | |
907 | goto error; | |
908 | } | |
909 | ||
910 | fid->uid = oldfid->uid; | |
911 | } else | |
912 | fid = oldfid; | |
913 | ||
51a87c55 EVH |
914 | |
915 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", | |
916 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
917 | ||
918 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
919 | nwname, wnames); | |
920 | if (IS_ERR(req)) { | |
921 | err = PTR_ERR(req); | |
bd238fb4 LI |
922 | goto error; |
923 | } | |
924 | ||
342fee1d | 925 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 EVH |
926 | if (err) { |
927 | p9pdu_dump(1, req->rc); | |
928 | p9_free_req(clnt, req); | |
51a87c55 | 929 | goto clunk_fid; |
e7f4b8f1 EVH |
930 | } |
931 | p9_free_req(clnt, req); | |
bd238fb4 | 932 | |
51a87c55 EVH |
933 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
934 | ||
935 | if (nwqids != nwname) { | |
bd238fb4 LI |
936 | err = -ENOENT; |
937 | goto clunk_fid; | |
938 | } | |
939 | ||
51a87c55 EVH |
940 | for (count = 0; count < nwqids; count++) |
941 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
942 | count, wqids[count].type, |
943 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
944 | wqids[count].version); |
945 | ||
bd238fb4 | 946 | if (nwname) |
51a87c55 | 947 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
948 | else |
949 | fid->qid = oldfid->qid; | |
950 | ||
62b2be59 | 951 | kfree(wqids); |
bd238fb4 LI |
952 | return fid; |
953 | ||
954 | clunk_fid: | |
62b2be59 | 955 | kfree(wqids); |
51a87c55 EVH |
956 | p9_client_clunk(fid); |
957 | fid = NULL; | |
bd238fb4 LI |
958 | |
959 | error: | |
bd238fb4 LI |
960 | if (fid && (fid != oldfid)) |
961 | p9_fid_destroy(fid); | |
962 | ||
963 | return ERR_PTR(err); | |
964 | } | |
965 | EXPORT_SYMBOL(p9_client_walk); | |
966 | ||
967 | int p9_client_open(struct p9_fid *fid, int mode) | |
968 | { | |
969 | int err; | |
bd238fb4 | 970 | struct p9_client *clnt; |
51a87c55 EVH |
971 | struct p9_req_t *req; |
972 | struct p9_qid qid; | |
973 | int iounit; | |
bd238fb4 | 974 | |
bd238fb4 | 975 | clnt = fid->clnt; |
ef56547e MK |
976 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
977 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); | |
978 | err = 0; | |
bd238fb4 LI |
979 | |
980 | if (fid->mode != -1) | |
981 | return -EINVAL; | |
982 | ||
ef56547e MK |
983 | if (p9_is_proto_dotl(clnt)) |
984 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
985 | else | |
986 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
987 | if (IS_ERR(req)) { |
988 | err = PTR_ERR(req); | |
989 | goto error; | |
bd238fb4 LI |
990 | } |
991 | ||
342fee1d | 992 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
993 | if (err) { |
994 | p9pdu_dump(1, req->rc); | |
995 | goto free_and_error; | |
996 | } | |
51a87c55 | 997 | |
ef56547e MK |
998 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
999 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, | |
1000 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1001 | |
1002 | fid->mode = mode; | |
51a87c55 | 1003 | fid->iounit = iounit; |
bd238fb4 | 1004 | |
e7f4b8f1 EVH |
1005 | free_and_error: |
1006 | p9_free_req(clnt, req); | |
51a87c55 | 1007 | error: |
bd238fb4 LI |
1008 | return err; |
1009 | } | |
1010 | EXPORT_SYMBOL(p9_client_open); | |
1011 | ||
5643135a VJJ |
1012 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
1013 | gid_t gid, struct p9_qid *qid) | |
1014 | { | |
1015 | int err = 0; | |
1016 | struct p9_client *clnt; | |
1017 | struct p9_req_t *req; | |
1018 | int iounit; | |
1019 | ||
1020 | P9_DPRINTK(P9_DEBUG_9P, | |
1021 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", | |
1022 | ofid->fid, name, flags, mode, gid); | |
1023 | clnt = ofid->clnt; | |
1024 | ||
1025 | if (ofid->mode != -1) | |
1026 | return -EINVAL; | |
1027 | ||
1028 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, | |
1029 | mode, gid); | |
1030 | if (IS_ERR(req)) { | |
1031 | err = PTR_ERR(req); | |
1032 | goto error; | |
1033 | } | |
1034 | ||
1035 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1036 | if (err) { | |
1037 | p9pdu_dump(1, req->rc); | |
1038 | goto free_and_error; | |
1039 | } | |
1040 | ||
1041 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", | |
1042 | qid->type, | |
1043 | (unsigned long long)qid->path, | |
1044 | qid->version, iounit); | |
1045 | ||
1046 | ofid->mode = mode; | |
1047 | ofid->iounit = iounit; | |
1048 | ||
1049 | free_and_error: | |
1050 | p9_free_req(clnt, req); | |
1051 | error: | |
1052 | return err; | |
1053 | } | |
1054 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1055 | ||
bd238fb4 LI |
1056 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1057 | char *extension) | |
1058 | { | |
1059 | int err; | |
bd238fb4 | 1060 | struct p9_client *clnt; |
51a87c55 EVH |
1061 | struct p9_req_t *req; |
1062 | struct p9_qid qid; | |
1063 | int iounit; | |
bd238fb4 | 1064 | |
51a87c55 EVH |
1065 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1066 | fid->fid, name, perm, mode); | |
bd238fb4 | 1067 | err = 0; |
bd238fb4 LI |
1068 | clnt = fid->clnt; |
1069 | ||
1070 | if (fid->mode != -1) | |
1071 | return -EINVAL; | |
1072 | ||
51a87c55 EVH |
1073 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1074 | mode, extension); | |
1075 | if (IS_ERR(req)) { | |
1076 | err = PTR_ERR(req); | |
1077 | goto error; | |
bd238fb4 LI |
1078 | } |
1079 | ||
342fee1d | 1080 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 EVH |
1081 | if (err) { |
1082 | p9pdu_dump(1, req->rc); | |
1083 | goto free_and_error; | |
1084 | } | |
51a87c55 EVH |
1085 | |
1086 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1087 | qid.type, |
1088 | (unsigned long long)qid.path, | |
1089 | qid.version, iounit); | |
bd238fb4 LI |
1090 | |
1091 | fid->mode = mode; | |
51a87c55 | 1092 | fid->iounit = iounit; |
bd238fb4 | 1093 | |
e7f4b8f1 EVH |
1094 | free_and_error: |
1095 | p9_free_req(clnt, req); | |
51a87c55 | 1096 | error: |
bd238fb4 LI |
1097 | return err; |
1098 | } | |
1099 | EXPORT_SYMBOL(p9_client_fcreate); | |
1100 | ||
50cc42ff VJJ |
1101 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
1102 | struct p9_qid *qid) | |
1103 | { | |
1104 | int err = 0; | |
1105 | struct p9_client *clnt; | |
1106 | struct p9_req_t *req; | |
1107 | ||
1108 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", | |
1109 | dfid->fid, name, symtgt); | |
1110 | clnt = dfid->clnt; | |
1111 | ||
1112 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, | |
1113 | gid); | |
1114 | if (IS_ERR(req)) { | |
1115 | err = PTR_ERR(req); | |
1116 | goto error; | |
1117 | } | |
1118 | ||
1119 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1120 | if (err) { | |
1121 | p9pdu_dump(1, req->rc); | |
1122 | goto free_and_error; | |
1123 | } | |
1124 | ||
1125 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", | |
1126 | qid->type, (unsigned long long)qid->path, qid->version); | |
1127 | ||
1128 | free_and_error: | |
1129 | p9_free_req(clnt, req); | |
1130 | error: | |
1131 | return err; | |
1132 | } | |
1133 | EXPORT_SYMBOL(p9_client_symlink); | |
1134 | ||
652df9a7 VJJ |
1135 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1136 | { | |
1137 | struct p9_client *clnt; | |
1138 | struct p9_req_t *req; | |
1139 | ||
1140 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", | |
1141 | dfid->fid, oldfid->fid, newname); | |
1142 | clnt = dfid->clnt; | |
1143 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1144 | newname); | |
1145 | if (IS_ERR(req)) | |
1146 | return PTR_ERR(req); | |
1147 | ||
1148 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); | |
1149 | p9_free_req(clnt, req); | |
1150 | return 0; | |
1151 | } | |
1152 | EXPORT_SYMBOL(p9_client_link); | |
1153 | ||
bd238fb4 LI |
1154 | int p9_client_clunk(struct p9_fid *fid) |
1155 | { | |
1156 | int err; | |
bd238fb4 | 1157 | struct p9_client *clnt; |
51a87c55 | 1158 | struct p9_req_t *req; |
bd238fb4 | 1159 | |
51a87c55 | 1160 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1161 | err = 0; |
bd238fb4 LI |
1162 | clnt = fid->clnt; |
1163 | ||
51a87c55 EVH |
1164 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1165 | if (IS_ERR(req)) { | |
1166 | err = PTR_ERR(req); | |
1167 | goto error; | |
bd238fb4 LI |
1168 | } |
1169 | ||
51a87c55 | 1170 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1171 | |
51a87c55 | 1172 | p9_free_req(clnt, req); |
bd238fb4 LI |
1173 | p9_fid_destroy(fid); |
1174 | ||
51a87c55 | 1175 | error: |
bd238fb4 LI |
1176 | return err; |
1177 | } | |
1178 | EXPORT_SYMBOL(p9_client_clunk); | |
1179 | ||
1180 | int p9_client_remove(struct p9_fid *fid) | |
1181 | { | |
1182 | int err; | |
bd238fb4 | 1183 | struct p9_client *clnt; |
51a87c55 | 1184 | struct p9_req_t *req; |
bd238fb4 | 1185 | |
51a87c55 | 1186 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1187 | err = 0; |
bd238fb4 LI |
1188 | clnt = fid->clnt; |
1189 | ||
51a87c55 EVH |
1190 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1191 | if (IS_ERR(req)) { | |
1192 | err = PTR_ERR(req); | |
1193 | goto error; | |
bd238fb4 LI |
1194 | } |
1195 | ||
51a87c55 | 1196 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1197 | |
51a87c55 | 1198 | p9_free_req(clnt, req); |
51a87c55 | 1199 | error: |
0b1208b1 | 1200 | p9_fid_destroy(fid); |
bd238fb4 LI |
1201 | return err; |
1202 | } | |
1203 | EXPORT_SYMBOL(p9_client_remove); | |
1204 | ||
0fc9655e EVH |
1205 | int |
1206 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1207 | u32 count) | |
bd238fb4 | 1208 | { |
51a87c55 | 1209 | int err, rsize, total; |
bd238fb4 | 1210 | struct p9_client *clnt; |
51a87c55 EVH |
1211 | struct p9_req_t *req; |
1212 | char *dataptr; | |
bd238fb4 | 1213 | |
51a87c55 | 1214 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
bd238fb4 LI |
1215 | (long long unsigned) offset, count); |
1216 | err = 0; | |
bd238fb4 LI |
1217 | clnt = fid->clnt; |
1218 | total = 0; | |
1219 | ||
1220 | rsize = fid->iounit; | |
1221 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1222 | rsize = clnt->msize - P9_IOHDRSZ; | |
1223 | ||
51a87c55 EVH |
1224 | if (count < rsize) |
1225 | rsize = count; | |
bd238fb4 | 1226 | |
51a87c55 EVH |
1227 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
1228 | if (IS_ERR(req)) { | |
1229 | err = PTR_ERR(req); | |
1230 | goto error; | |
1231 | } | |
bd238fb4 | 1232 | |
342fee1d | 1233 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 EVH |
1234 | if (err) { |
1235 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1236 | goto free_and_error; |
e7f4b8f1 | 1237 | } |
bd238fb4 | 1238 | |
51a87c55 | 1239 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1240 | |
51a87c55 EVH |
1241 | if (data) { |
1242 | memmove(data, dataptr, count); | |
51a87c55 | 1243 | } |
bd238fb4 | 1244 | |
51a87c55 EVH |
1245 | if (udata) { |
1246 | err = copy_to_user(udata, dataptr, count); | |
1247 | if (err) { | |
1248 | err = -EFAULT; | |
1249 | goto free_and_error; | |
bd238fb4 | 1250 | } |
51a87c55 | 1251 | } |
bd238fb4 | 1252 | |
51a87c55 EVH |
1253 | p9_free_req(clnt, req); |
1254 | return count; | |
bd238fb4 | 1255 | |
51a87c55 EVH |
1256 | free_and_error: |
1257 | p9_free_req(clnt, req); | |
bd238fb4 | 1258 | error: |
bd238fb4 LI |
1259 | return err; |
1260 | } | |
0fc9655e | 1261 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1262 | |
1263 | int | |
0fc9655e EVH |
1264 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1265 | u64 offset, u32 count) | |
bd238fb4 | 1266 | { |
51a87c55 | 1267 | int err, rsize, total; |
bd238fb4 | 1268 | struct p9_client *clnt; |
51a87c55 | 1269 | struct p9_req_t *req; |
bd238fb4 | 1270 | |
51a87c55 EVH |
1271 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1272 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1273 | err = 0; |
bd238fb4 LI |
1274 | clnt = fid->clnt; |
1275 | total = 0; | |
1276 | ||
1277 | rsize = fid->iounit; | |
1278 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1279 | rsize = clnt->msize - P9_IOHDRSZ; | |
1280 | ||
51a87c55 EVH |
1281 | if (count < rsize) |
1282 | rsize = count; | |
1283 | if (data) | |
1284 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, | |
1285 | rsize, data); | |
1286 | else | |
1287 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, | |
1288 | rsize, udata); | |
1289 | if (IS_ERR(req)) { | |
1290 | err = PTR_ERR(req); | |
1291 | goto error; | |
1292 | } | |
0fc9655e | 1293 | |
342fee1d | 1294 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 EVH |
1295 | if (err) { |
1296 | p9pdu_dump(1, req->rc); | |
51a87c55 | 1297 | goto free_and_error; |
e7f4b8f1 EVH |
1298 | } |
1299 | ||
51a87c55 | 1300 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
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_write); |
bd238fb4 | 1311 | |
51a87c55 | 1312 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1313 | { |
51a87c55 EVH |
1314 | int err; |
1315 | struct p9_client *clnt; | |
1316 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1317 | struct p9_req_t *req; | |
1318 | u16 ignored; | |
5503ac56 | 1319 | |
51a87c55 | 1320 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1321 | |
5503ac56 EVH |
1322 | if (!ret) |
1323 | return ERR_PTR(-ENOMEM); | |
1324 | ||
bd238fb4 | 1325 | err = 0; |
bd238fb4 LI |
1326 | clnt = fid->clnt; |
1327 | ||
51a87c55 EVH |
1328 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1329 | if (IS_ERR(req)) { | |
1330 | err = PTR_ERR(req); | |
bd238fb4 LI |
1331 | goto error; |
1332 | } | |
1333 | ||
342fee1d | 1334 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1335 | if (err) { |
e7f4b8f1 | 1336 | p9pdu_dump(1, req->rc); |
eedfe1c4 AK |
1337 | p9_free_req(clnt, req); |
1338 | goto error; | |
e7f4b8f1 | 1339 | } |
bd238fb4 | 1340 | |
51a87c55 | 1341 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1342 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1343 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1344 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1345 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1346 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1347 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1348 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1349 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1350 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1351 | |
742b11a7 LI |
1352 | p9_free_req(clnt, req); |
1353 | return ret; | |
1354 | ||
bd238fb4 | 1355 | error: |
742b11a7 LI |
1356 | kfree(ret); |
1357 | return ERR_PTR(err); | |
bd238fb4 LI |
1358 | } |
1359 | EXPORT_SYMBOL(p9_client_stat); | |
1360 | ||
f0853122 SK |
1361 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1362 | u64 request_mask) | |
1363 | { | |
1364 | int err; | |
1365 | struct p9_client *clnt; | |
1366 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1367 | GFP_KERNEL); | |
1368 | struct p9_req_t *req; | |
1369 | ||
1370 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", | |
1371 | fid->fid, request_mask); | |
1372 | ||
1373 | if (!ret) | |
1374 | return ERR_PTR(-ENOMEM); | |
1375 | ||
1376 | err = 0; | |
1377 | clnt = fid->clnt; | |
1378 | ||
1379 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1380 | if (IS_ERR(req)) { | |
1381 | err = PTR_ERR(req); | |
1382 | goto error; | |
1383 | } | |
1384 | ||
1385 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1386 | if (err) { | |
1387 | p9pdu_dump(1, req->rc); | |
1388 | p9_free_req(clnt, req); | |
1389 | goto error; | |
1390 | } | |
1391 | ||
1392 | P9_DPRINTK(P9_DEBUG_9P, | |
1393 | "<<< RGETATTR st_result_mask=%lld\n" | |
1394 | "<<< qid=%x.%llx.%x\n" | |
1395 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1396 | "<<< st_uid=%d st_gid=%d\n" | |
1397 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1398 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1399 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1400 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1401 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1402 | "<<< st_gen=%lld st_data_version=%lld", | |
1403 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
1404 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, | |
1405 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, | |
1406 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, | |
1407 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1408 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1409 | ret->st_gen, ret->st_data_version); | |
1410 | ||
1411 | p9_free_req(clnt, req); | |
1412 | return ret; | |
1413 | ||
1414 | error: | |
1415 | kfree(ret); | |
1416 | return ERR_PTR(err); | |
1417 | } | |
1418 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1419 | ||
342fee1d | 1420 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1421 | { |
1422 | int ret; | |
1423 | ||
9d6939da | 1424 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1425 | /* size[2] type[2] dev[4] qid[13] */ |
1426 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1427 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1428 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1429 | |
1430 | if (wst->name) | |
1431 | ret += strlen(wst->name); | |
1432 | if (wst->uid) | |
1433 | ret += strlen(wst->uid); | |
1434 | if (wst->gid) | |
1435 | ret += strlen(wst->gid); | |
1436 | if (wst->muid) | |
1437 | ret += strlen(wst->muid); | |
1438 | ||
c56e4acf SK |
1439 | if ((proto_version == p9_proto_2000u) || |
1440 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1441 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1442 | if (wst->extension) | |
1443 | ret += strlen(wst->extension); | |
1444 | } | |
1445 | ||
1446 | return ret; | |
1447 | } | |
1448 | ||
bd238fb4 LI |
1449 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1450 | { | |
1451 | int err; | |
51a87c55 | 1452 | struct p9_req_t *req; |
bd238fb4 LI |
1453 | struct p9_client *clnt; |
1454 | ||
453ed90d LI |
1455 | err = 0; |
1456 | clnt = fid->clnt; | |
342fee1d | 1457 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
51a87c55 | 1458 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1459 | P9_DPRINTK(P9_DEBUG_9P, |
1460 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1461 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1462 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1463 | " uid=%d gid=%d n_muid=%d\n", | |
1464 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1465 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1466 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1467 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1468 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1469 | |
9d6939da | 1470 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1471 | if (IS_ERR(req)) { |
1472 | err = PTR_ERR(req); | |
1473 | goto error; | |
bd238fb4 LI |
1474 | } |
1475 | ||
51a87c55 | 1476 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1477 | |
51a87c55 EVH |
1478 | p9_free_req(clnt, req); |
1479 | error: | |
bd238fb4 LI |
1480 | return err; |
1481 | } | |
1482 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1483 | |
87d7845a SK |
1484 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1485 | { | |
1486 | int err; | |
1487 | struct p9_req_t *req; | |
1488 | struct p9_client *clnt; | |
1489 | ||
1490 | err = 0; | |
1491 | clnt = fid->clnt; | |
1492 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); | |
1493 | P9_DPRINTK(P9_DEBUG_9P, | |
1494 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" | |
1495 | " atime_sec=%lld atime_nsec=%lld\n" | |
1496 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
1497 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, | |
1498 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, | |
1499 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1500 | ||
1501 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1502 | ||
1503 | if (IS_ERR(req)) { | |
1504 | err = PTR_ERR(req); | |
1505 | goto error; | |
1506 | } | |
1507 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); | |
1508 | p9_free_req(clnt, req); | |
1509 | error: | |
1510 | return err; | |
1511 | } | |
1512 | EXPORT_SYMBOL(p9_client_setattr); | |
1513 | ||
bda8e775 SK |
1514 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1515 | { | |
1516 | int err; | |
1517 | struct p9_req_t *req; | |
1518 | struct p9_client *clnt; | |
1519 | ||
1520 | err = 0; | |
1521 | clnt = fid->clnt; | |
1522 | ||
1523 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); | |
1524 | ||
1525 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1526 | if (IS_ERR(req)) { | |
1527 | err = PTR_ERR(req); | |
1528 | goto error; | |
1529 | } | |
1530 | ||
1531 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1532 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1533 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1534 | if (err) { | |
1535 | p9pdu_dump(1, req->rc); | |
1536 | p9_free_req(clnt, req); | |
1537 | goto error; | |
1538 | } | |
1539 | ||
1540 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " | |
1541 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " | |
1542 | "fsid %llu namelen %ld\n", | |
1543 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1544 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1545 | sb->fsid, (long int)sb->namelen); | |
1546 | ||
1547 | p9_free_req(clnt, req); | |
1548 | error: | |
1549 | return err; | |
1550 | } | |
1551 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda SK |
1552 | |
1553 | int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) | |
1554 | { | |
1555 | int err; | |
1556 | struct p9_req_t *req; | |
1557 | struct p9_client *clnt; | |
1558 | ||
1559 | err = 0; | |
1560 | clnt = fid->clnt; | |
1561 | ||
1562 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", | |
1563 | fid->fid, newdirfid->fid, name); | |
1564 | ||
1565 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1566 | newdirfid->fid, name); | |
1567 | if (IS_ERR(req)) { | |
1568 | err = PTR_ERR(req); | |
1569 | goto error; | |
1570 | } | |
1571 | ||
1572 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); | |
1573 | ||
1574 | p9_free_req(clnt, req); | |
1575 | error: | |
1576 | return err; | |
1577 | } | |
1578 | EXPORT_SYMBOL(p9_client_rename); | |
1579 | ||
0ef63f34 AK |
1580 | /* |
1581 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1582 | */ | |
1583 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1584 | const char *attr_name, u64 *attr_size) | |
1585 | { | |
1586 | int err; | |
1587 | struct p9_req_t *req; | |
1588 | struct p9_client *clnt; | |
1589 | struct p9_fid *attr_fid; | |
1590 | ||
1591 | err = 0; | |
1592 | clnt = file_fid->clnt; | |
1593 | attr_fid = p9_fid_create(clnt); | |
1594 | if (IS_ERR(attr_fid)) { | |
1595 | err = PTR_ERR(attr_fid); | |
1596 | attr_fid = NULL; | |
1597 | goto error; | |
1598 | } | |
1599 | P9_DPRINTK(P9_DEBUG_9P, | |
1600 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", | |
1601 | file_fid->fid, attr_fid->fid, attr_name); | |
1602 | ||
1603 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1604 | file_fid->fid, attr_fid->fid, attr_name); | |
1605 | if (IS_ERR(req)) { | |
1606 | err = PTR_ERR(req); | |
1607 | goto error; | |
1608 | } | |
1609 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
1610 | if (err) { | |
1611 | p9pdu_dump(1, req->rc); | |
1612 | p9_free_req(clnt, req); | |
1613 | goto clunk_fid; | |
1614 | } | |
1615 | p9_free_req(clnt, req); | |
1616 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", | |
1617 | attr_fid->fid, *attr_size); | |
1618 | return attr_fid; | |
1619 | clunk_fid: | |
1620 | p9_client_clunk(attr_fid); | |
1621 | attr_fid = NULL; | |
1622 | error: | |
1623 | if (attr_fid && (attr_fid != file_fid)) | |
1624 | p9_fid_destroy(attr_fid); | |
1625 | ||
1626 | return ERR_PTR(err); | |
1627 | } | |
1628 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
1629 | ||
eda25e46 AK |
1630 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
1631 | u64 attr_size, int flags) | |
1632 | { | |
1633 | int err; | |
1634 | struct p9_req_t *req; | |
1635 | struct p9_client *clnt; | |
1636 | ||
1637 | P9_DPRINTK(P9_DEBUG_9P, | |
1638 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", | |
1639 | fid->fid, name, (long long)attr_size, flags); | |
1640 | err = 0; | |
1641 | clnt = fid->clnt; | |
1642 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
1643 | fid->fid, name, attr_size, flags); | |
1644 | if (IS_ERR(req)) { | |
1645 | err = PTR_ERR(req); | |
1646 | goto error; | |
1647 | } | |
1648 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); | |
1649 | p9_free_req(clnt, req); | |
1650 | error: | |
1651 | return err; | |
1652 | } | |
1653 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
1654 | ||
7751bdb3 SK |
1655 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
1656 | { | |
1657 | int err, rsize, total; | |
1658 | struct p9_client *clnt; | |
1659 | struct p9_req_t *req; | |
1660 | char *dataptr; | |
1661 | ||
1662 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", | |
1663 | fid->fid, (long long unsigned) offset, count); | |
1664 | ||
1665 | err = 0; | |
1666 | clnt = fid->clnt; | |
1667 | total = 0; | |
1668 | ||
1669 | rsize = fid->iounit; | |
1670 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
1671 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
1672 | ||
1673 | if (count < rsize) | |
1674 | rsize = count; | |
1675 | ||
1676 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); | |
1677 | if (IS_ERR(req)) { | |
1678 | err = PTR_ERR(req); | |
1679 | goto error; | |
1680 | } | |
1681 | ||
1682 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
1683 | if (err) { | |
1684 | p9pdu_dump(1, req->rc); | |
1685 | goto free_and_error; | |
1686 | } | |
1687 | ||
1688 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); | |
1689 | ||
1690 | if (data) | |
1691 | memmove(data, dataptr, count); | |
1692 | ||
1693 | p9_free_req(clnt, req); | |
1694 | return count; | |
1695 | ||
1696 | free_and_error: | |
1697 | p9_free_req(clnt, req); | |
1698 | error: | |
1699 | return err; | |
1700 | } | |
1701 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
1702 | |
1703 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
1704 | dev_t rdev, gid_t gid, struct p9_qid *qid) | |
1705 | { | |
1706 | int err; | |
1707 | struct p9_client *clnt; | |
1708 | struct p9_req_t *req; | |
1709 | ||
1710 | err = 0; | |
1711 | clnt = fid->clnt; | |
1712 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " | |
1713 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); | |
1714 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, | |
1715 | MAJOR(rdev), MINOR(rdev), gid); | |
1716 | if (IS_ERR(req)) | |
1717 | return PTR_ERR(req); | |
1718 | ||
1719 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1720 | if (err) { | |
1721 | p9pdu_dump(1, req->rc); | |
1722 | goto error; | |
1723 | } | |
1724 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, | |
1725 | (unsigned long long)qid->path, qid->version); | |
1726 | ||
1727 | error: | |
1728 | p9_free_req(clnt, req); | |
1729 | return err; | |
1730 | ||
1731 | } | |
1732 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
1733 | |
1734 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
1735 | gid_t gid, struct p9_qid *qid) | |
1736 | { | |
1737 | int err; | |
1738 | struct p9_client *clnt; | |
1739 | struct p9_req_t *req; | |
1740 | ||
1741 | err = 0; | |
1742 | clnt = fid->clnt; | |
1743 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", | |
1744 | fid->fid, name, mode, gid); | |
1745 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, | |
1746 | gid); | |
1747 | if (IS_ERR(req)) | |
1748 | return PTR_ERR(req); | |
1749 | ||
1750 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1751 | if (err) { | |
1752 | p9pdu_dump(1, req->rc); | |
1753 | goto error; | |
1754 | } | |
1755 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, | |
1756 | (unsigned long long)qid->path, qid->version); | |
1757 | ||
1758 | error: | |
1759 | p9_free_req(clnt, req); | |
1760 | return err; | |
1761 | ||
1762 | } | |
1763 | EXPORT_SYMBOL(p9_client_mkdir_dotl); |