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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 | ||
5d385153 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
bd238fb4 LI |
28 | #include <linux/module.h> |
29 | #include <linux/errno.h> | |
30 | #include <linux/fs.h> | |
8a0dc95f | 31 | #include <linux/poll.h> |
bd238fb4 LI |
32 | #include <linux/idr.h> |
33 | #include <linux/mutex.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
bd238fb4 LI |
35 | #include <linux/sched.h> |
36 | #include <linux/uaccess.h> | |
37 | #include <net/9p/9p.h> | |
fb0466c3 | 38 | #include <linux/parser.h> |
bd238fb4 | 39 | #include <net/9p/client.h> |
8b81ef58 | 40 | #include <net/9p/transport.h> |
51a87c55 | 41 | #include "protocol.h" |
bd238fb4 | 42 | |
348b5901 AK |
43 | #define CREATE_TRACE_POINTS |
44 | #include <trace/events/9p.h> | |
45 | ||
8a0dc95f EVH |
46 | /* |
47 | * Client Option Parsing (code inspired by NFS code) | |
48 | * - a little lazy - parse all client options | |
49 | */ | |
50 | ||
51 | enum { | |
52 | Opt_msize, | |
53 | Opt_trans, | |
54 | Opt_legacy, | |
0fb80abd | 55 | Opt_version, |
8a0dc95f EVH |
56 | Opt_err, |
57 | }; | |
58 | ||
a447c093 | 59 | static const match_table_t tokens = { |
8a0dc95f EVH |
60 | {Opt_msize, "msize=%u"}, |
61 | {Opt_legacy, "noextend"}, | |
62 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 63 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
64 | {Opt_err, NULL}, |
65 | }; | |
66 | ||
342fee1d SK |
67 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
68 | { | |
a02cec21 | 69 | return clnt->proto_version == p9_proto_2000L; |
342fee1d SK |
70 | } |
71 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
72 | ||
73 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
74 | { | |
a02cec21 | 75 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
76 | } |
77 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
78 | ||
43def35c SD |
79 | /* |
80 | * Some error codes are taken directly from the server replies, | |
81 | * make sure they are valid. | |
82 | */ | |
83 | static int safe_errno(int err) | |
84 | { | |
85 | if ((err > 0) || (err < -MAX_ERRNO)) { | |
86 | p9_debug(P9_DEBUG_ERROR, "Invalid error code %d\n", err); | |
87 | return -EPROTO; | |
88 | } | |
89 | return err; | |
90 | } | |
91 | ||
92 | ||
0fb80abd | 93 | /* Interpret mount option for protocol version */ |
4d63055f | 94 | static int get_protocol_version(char *s) |
0fb80abd | 95 | { |
3dc9fef6 DC |
96 | int version = -EINVAL; |
97 | ||
4d63055f | 98 | if (!strcmp(s, "9p2000")) { |
0fb80abd | 99 | version = p9_proto_legacy; |
5d385153 | 100 | p9_debug(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
4d63055f | 101 | } else if (!strcmp(s, "9p2000.u")) { |
0fb80abd | 102 | version = p9_proto_2000u; |
5d385153 | 103 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
4d63055f | 104 | } else if (!strcmp(s, "9p2000.L")) { |
45bc21ed | 105 | version = p9_proto_2000L; |
5d385153 | 106 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
4d63055f | 107 | } else |
5d385153 | 108 | pr_info("Unknown protocol version %s\n", s); |
4d63055f | 109 | |
0fb80abd SK |
110 | return version; |
111 | } | |
112 | ||
8a0dc95f | 113 | /** |
0e15597e AK |
114 | * parse_options - parse mount options into client structure |
115 | * @opts: options string passed from mount | |
116 | * @clnt: existing v9fs client information | |
8a0dc95f | 117 | * |
bb8ffdfc | 118 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
119 | */ |
120 | ||
bb8ffdfc | 121 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 122 | { |
d8c8a9e3 | 123 | char *options, *tmp_options; |
8a0dc95f EVH |
124 | char *p; |
125 | substring_t args[MAX_OPT_ARGS]; | |
126 | int option; | |
4d63055f | 127 | char *s; |
bb8ffdfc | 128 | int ret = 0; |
8a0dc95f | 129 | |
095e7999 | 130 | clnt->proto_version = p9_proto_2000L; |
8a0dc95f EVH |
131 | clnt->msize = 8192; |
132 | ||
bb8ffdfc EVH |
133 | if (!opts) |
134 | return 0; | |
135 | ||
d8c8a9e3 EVH |
136 | tmp_options = kstrdup(opts, GFP_KERNEL); |
137 | if (!tmp_options) { | |
5d385153 JP |
138 | p9_debug(P9_DEBUG_ERROR, |
139 | "failed to allocate copy of option string\n"); | |
bb8ffdfc EVH |
140 | return -ENOMEM; |
141 | } | |
d8c8a9e3 | 142 | options = tmp_options; |
8a0dc95f EVH |
143 | |
144 | while ((p = strsep(&options, ",")) != NULL) { | |
4d5077f1 | 145 | int token, r; |
8a0dc95f EVH |
146 | if (!*p) |
147 | continue; | |
148 | token = match_token(p, tokens, args); | |
4d5077f1 AK |
149 | switch (token) { |
150 | case Opt_msize: | |
151 | r = match_int(&args[0], &option); | |
bb8ffdfc | 152 | if (r < 0) { |
5d385153 JP |
153 | p9_debug(P9_DEBUG_ERROR, |
154 | "integer field, but no integer?\n"); | |
bb8ffdfc | 155 | ret = r; |
8a0dc95f EVH |
156 | continue; |
157 | } | |
8a0dc95f EVH |
158 | clnt->msize = option; |
159 | break; | |
160 | case Opt_trans: | |
4d63055f PK |
161 | s = match_strdup(&args[0]); |
162 | if (!s) { | |
163 | ret = -ENOMEM; | |
5d385153 JP |
164 | p9_debug(P9_DEBUG_ERROR, |
165 | "problem allocating copy of trans arg\n"); | |
4d63055f PK |
166 | goto free_and_return; |
167 | } | |
168 | clnt->trans_mod = v9fs_get_trans_by_name(s); | |
169 | if (clnt->trans_mod == NULL) { | |
5d385153 JP |
170 | pr_info("Could not find request transport: %s\n", |
171 | s); | |
349d3bb8 | 172 | ret = -EINVAL; |
4d63055f | 173 | kfree(s); |
349d3bb8 EVH |
174 | goto free_and_return; |
175 | } | |
4d63055f | 176 | kfree(s); |
8a0dc95f EVH |
177 | break; |
178 | case Opt_legacy: | |
342fee1d | 179 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 180 | break; |
0fb80abd | 181 | case Opt_version: |
4d63055f PK |
182 | s = match_strdup(&args[0]); |
183 | if (!s) { | |
184 | ret = -ENOMEM; | |
5d385153 JP |
185 | p9_debug(P9_DEBUG_ERROR, |
186 | "problem allocating copy of version arg\n"); | |
0fb80abd | 187 | goto free_and_return; |
4d63055f PK |
188 | } |
189 | ret = get_protocol_version(s); | |
190 | if (ret == -EINVAL) { | |
191 | kfree(s); | |
192 | goto free_and_return; | |
193 | } | |
194 | kfree(s); | |
0fb80abd SK |
195 | clnt->proto_version = ret; |
196 | break; | |
8a0dc95f EVH |
197 | default: |
198 | continue; | |
199 | } | |
200 | } | |
72029fe8 | 201 | |
349d3bb8 | 202 | free_and_return: |
d8c8a9e3 | 203 | kfree(tmp_options); |
bb8ffdfc | 204 | return ret; |
8a0dc95f EVH |
205 | } |
206 | ||
05a782d4 | 207 | static struct p9_fcall *p9_fcall_alloc(int alloc_msize) |
5387320d SD |
208 | { |
209 | struct p9_fcall *fc; | |
210 | fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS); | |
211 | if (!fc) | |
212 | return NULL; | |
213 | fc->capacity = alloc_msize; | |
214 | fc->sdata = (char *) fc + sizeof(struct p9_fcall); | |
215 | return fc; | |
216 | } | |
217 | ||
fea511a6 EVH |
218 | /** |
219 | * p9_tag_alloc - lookup/allocate a request by tag | |
220 | * @c: client session to lookup tag within | |
221 | * @tag: numeric id for transaction | |
222 | * | |
223 | * this is a simple array lookup, but will grow the | |
25985edc | 224 | * request_slots as necessary to accommodate transaction |
fea511a6 EVH |
225 | * ids which did not previously have a slot. |
226 | * | |
227 | * this code relies on the client spinlock to manage locks, its | |
228 | * possible we should switch to something else, but I'd rather | |
229 | * stick with something low-overhead for the common case. | |
230 | * | |
231 | */ | |
232 | ||
ef6b0807 DC |
233 | static struct p9_req_t * |
234 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) | |
fea511a6 EVH |
235 | { |
236 | unsigned long flags; | |
237 | int row, col; | |
51a87c55 | 238 | struct p9_req_t *req; |
abfa034e | 239 | int alloc_msize = min(c->msize, max_size); |
fea511a6 EVH |
240 | |
241 | /* This looks up the original request by tag so we know which | |
242 | * buffer to read the data into */ | |
243 | tag++; | |
244 | ||
245 | if (tag >= c->max_tag) { | |
246 | spin_lock_irqsave(&c->lock, flags); | |
247 | /* check again since original check was outside of lock */ | |
248 | while (tag >= c->max_tag) { | |
249 | row = (tag / P9_ROW_MAXTAG); | |
250 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
251 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
252 | ||
253 | if (!c->reqs[row]) { | |
5d385153 | 254 | pr_err("Couldn't grow tag array\n"); |
e45c5405 | 255 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 256 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
257 | } |
258 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
259 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 260 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
261 | } |
262 | c->max_tag += P9_ROW_MAXTAG; | |
263 | } | |
264 | spin_unlock_irqrestore(&c->lock, flags); | |
265 | } | |
266 | row = tag / P9_ROW_MAXTAG; | |
267 | col = tag % P9_ROW_MAXTAG; | |
268 | ||
51a87c55 | 269 | req = &c->reqs[row][col]; |
5387320d | 270 | if (!req->wq) { |
eeff66ef | 271 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
ea071aa1 SD |
272 | if (!req->wq) |
273 | goto grow_failed; | |
51a87c55 | 274 | init_waitqueue_head(req->wq); |
ea071aa1 | 275 | } |
ea071aa1 | 276 | |
5387320d SD |
277 | if (!req->tc) |
278 | req->tc = p9_fcall_alloc(alloc_msize); | |
279 | if (!req->rc) | |
280 | req->rc = p9_fcall_alloc(alloc_msize); | |
281 | if (!req->tc || !req->rc) | |
282 | goto grow_failed; | |
51a87c55 EVH |
283 | |
284 | p9pdu_reset(req->tc); | |
285 | p9pdu_reset(req->rc); | |
286 | ||
51a87c55 EVH |
287 | req->tc->tag = tag-1; |
288 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 | 289 | |
ea071aa1 SD |
290 | return req; |
291 | ||
292 | grow_failed: | |
293 | pr_err("Couldn't grow tag array\n"); | |
294 | kfree(req->tc); | |
295 | kfree(req->rc); | |
296 | kfree(req->wq); | |
297 | req->tc = req->rc = NULL; | |
298 | req->wq = NULL; | |
299 | return ERR_PTR(-ENOMEM); | |
fea511a6 | 300 | } |
fea511a6 EVH |
301 | |
302 | /** | |
303 | * p9_tag_lookup - lookup a request by tag | |
304 | * @c: client session to lookup tag within | |
305 | * @tag: numeric id for transaction | |
306 | * | |
307 | */ | |
308 | ||
309 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
310 | { | |
311 | int row, col; | |
312 | ||
313 | /* This looks up the original request by tag so we know which | |
314 | * buffer to read the data into */ | |
315 | tag++; | |
316 | ||
b85f7d92 EVH |
317 | if(tag >= c->max_tag) |
318 | return NULL; | |
fea511a6 EVH |
319 | |
320 | row = tag / P9_ROW_MAXTAG; | |
321 | col = tag % P9_ROW_MAXTAG; | |
322 | ||
323 | return &c->reqs[row][col]; | |
324 | } | |
325 | EXPORT_SYMBOL(p9_tag_lookup); | |
326 | ||
327 | /** | |
328 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 329 | * @c: v9fs client struct |
fea511a6 EVH |
330 | * |
331 | * This initializes the tags structure for each client instance. | |
332 | * | |
333 | */ | |
334 | ||
335 | static int p9_tag_init(struct p9_client *c) | |
336 | { | |
337 | int err = 0; | |
338 | ||
339 | c->tagpool = p9_idpool_create(); | |
340 | if (IS_ERR(c->tagpool)) { | |
341 | err = PTR_ERR(c->tagpool); | |
fea511a6 EVH |
342 | goto error; |
343 | } | |
fe1cbaba AK |
344 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
345 | if (err < 0) { | |
346 | p9_idpool_destroy(c->tagpool); | |
347 | goto error; | |
348 | } | |
fea511a6 EVH |
349 | c->max_tag = 0; |
350 | error: | |
351 | return err; | |
352 | } | |
353 | ||
354 | /** | |
355 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 356 | * @c: v9fs client struct |
fea511a6 EVH |
357 | * |
358 | * This frees resources associated with the tags structure | |
359 | * | |
360 | */ | |
361 | static void p9_tag_cleanup(struct p9_client *c) | |
362 | { | |
363 | int row, col; | |
364 | ||
365 | /* check to insure all requests are idle */ | |
366 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
367 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
368 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
5d385153 JP |
369 | p9_debug(P9_DEBUG_MUX, |
370 | "Attempting to cleanup non-free tag %d,%d\n", | |
371 | row, col); | |
fea511a6 EVH |
372 | /* TODO: delay execution of cleanup */ |
373 | return; | |
374 | } | |
375 | } | |
376 | } | |
377 | ||
62b2be59 LI |
378 | if (c->tagpool) { |
379 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 380 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 381 | } |
fea511a6 EVH |
382 | |
383 | /* free requests associated with tags */ | |
384 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 385 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 386 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
387 | kfree(c->reqs[row][col].tc); |
388 | kfree(c->reqs[row][col].rc); | |
389 | } | |
fea511a6 EVH |
390 | kfree(c->reqs[row]); |
391 | } | |
392 | c->max_tag = 0; | |
393 | } | |
394 | ||
673d62cd EVH |
395 | /** |
396 | * p9_free_req - free a request and clean-up as necessary | |
397 | * c: client state | |
398 | * r: request to release | |
399 | * | |
400 | */ | |
401 | ||
51a87c55 | 402 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 403 | { |
51a87c55 | 404 | int tag = r->tc->tag; |
5d385153 | 405 | p9_debug(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
51a87c55 | 406 | |
673d62cd | 407 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
408 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
409 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
410 | } |
411 | ||
91b8534f EVH |
412 | /** |
413 | * p9_client_cb - call back from transport to client | |
414 | * c: client state | |
415 | * req: request received | |
416 | * | |
417 | */ | |
2b6e72ed | 418 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status) |
91b8534f | 419 | { |
5d385153 | 420 | p9_debug(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
2b6e72ed DM |
421 | |
422 | /* | |
423 | * This barrier is needed to make sure any change made to req before | |
424 | * the other thread wakes up will indeed be seen by the waiting side. | |
425 | */ | |
426 | smp_wmb(); | |
427 | req->status = status; | |
428 | ||
1bab88b2 | 429 | wake_up(req->wq); |
5d385153 | 430 | p9_debug(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
91b8534f EVH |
431 | } |
432 | EXPORT_SYMBOL(p9_client_cb); | |
433 | ||
51a87c55 EVH |
434 | /** |
435 | * p9_parse_header - parse header arguments out of a packet | |
436 | * @pdu: packet to parse | |
437 | * @size: size of packet | |
438 | * @type: type of request | |
439 | * @tag: tag of packet | |
440 | * @rewind: set if we need to rewind offset afterwards | |
441 | */ | |
442 | ||
443 | int | |
444 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
445 | int rewind) | |
446 | { | |
447 | int8_t r_type; | |
448 | int16_t r_tag; | |
449 | int32_t r_size; | |
450 | int offset = pdu->offset; | |
451 | int err; | |
452 | ||
453 | pdu->offset = 0; | |
454 | if (pdu->size == 0) | |
455 | pdu->size = 7; | |
456 | ||
457 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
458 | if (err) | |
459 | goto rewind_and_exit; | |
460 | ||
461 | pdu->size = r_size; | |
462 | pdu->id = r_type; | |
463 | pdu->tag = r_tag; | |
464 | ||
5d385153 JP |
465 | p9_debug(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", |
466 | pdu->size, pdu->id, pdu->tag); | |
51a87c55 EVH |
467 | |
468 | if (type) | |
469 | *type = r_type; | |
470 | if (tag) | |
471 | *tag = r_tag; | |
472 | if (size) | |
473 | *size = r_size; | |
474 | ||
475 | ||
476 | rewind_and_exit: | |
477 | if (rewind) | |
478 | pdu->offset = offset; | |
479 | return err; | |
480 | } | |
481 | EXPORT_SYMBOL(p9_parse_header); | |
482 | ||
483 | /** | |
484 | * p9_check_errors - check 9p packet for error return and process it | |
485 | * @c: current client instance | |
486 | * @req: request to parse and check for error conditions | |
487 | * | |
488 | * returns error code if one is discovered, otherwise returns 0 | |
489 | * | |
490 | * this will have to be more complicated if we have multiple | |
491 | * error packet types | |
492 | */ | |
493 | ||
494 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
495 | { | |
496 | int8_t type; | |
497 | int err; | |
ca41bb3e | 498 | int ecode; |
51a87c55 EVH |
499 | |
500 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
501 | /* |
502 | * dump the response from server | |
503 | * This should be after check errors which poplulate pdu_fcall. | |
504 | */ | |
505 | trace_9p_protocol_dump(c, req->rc); | |
51a87c55 | 506 | if (err) { |
5d385153 | 507 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
51a87c55 EVH |
508 | return err; |
509 | } | |
ca41bb3e VJJ |
510 | if (type != P9_RERROR && type != P9_RLERROR) |
511 | return 0; | |
4f7ebe80 | 512 | |
ca41bb3e VJJ |
513 | if (!p9_is_proto_dotl(c)) { |
514 | char *ename; | |
ca41bb3e | 515 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e | 516 | &ename, &ecode); |
ca41bb3e VJJ |
517 | if (err) |
518 | goto out_err; | |
4f7ebe80 | 519 | |
ca41bb3e VJJ |
520 | if (p9_is_proto_dotu(c)) |
521 | err = -ecode; | |
4f7ebe80 | 522 | |
ca41bb3e VJJ |
523 | if (!err || !IS_ERR_VALUE(err)) { |
524 | err = p9_errstr2errno(ename, strlen(ename)); | |
4f7ebe80 | 525 | |
5d385153 JP |
526 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
527 | -ecode, ename); | |
4f7ebe80 | 528 | } |
abfa034e | 529 | kfree(ename); |
ca41bb3e VJJ |
530 | } else { |
531 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
532 | err = -ecode; | |
533 | ||
5d385153 | 534 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
ca41bb3e | 535 | } |
51a87c55 | 536 | |
51a87c55 | 537 | return err; |
4f7ebe80 AB |
538 | |
539 | out_err: | |
5d385153 | 540 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
4f7ebe80 AB |
541 | |
542 | return err; | |
51a87c55 EVH |
543 | } |
544 | ||
abfa034e AK |
545 | /** |
546 | * p9_check_zc_errors - check 9p packet for error return and process it | |
547 | * @c: current client instance | |
548 | * @req: request to parse and check for error conditions | |
549 | * @in_hdrlen: Size of response protocol buffer. | |
550 | * | |
551 | * returns error code if one is discovered, otherwise returns 0 | |
552 | * | |
553 | * this will have to be more complicated if we have multiple | |
554 | * error packet types | |
555 | */ | |
556 | ||
557 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, | |
558 | char *uidata, int in_hdrlen, int kern_buf) | |
559 | { | |
560 | int err; | |
561 | int ecode; | |
562 | int8_t type; | |
563 | char *ename = NULL; | |
564 | ||
565 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
566 | /* |
567 | * dump the response from server | |
568 | * This should be after parse_header which poplulate pdu_fcall. | |
569 | */ | |
570 | trace_9p_protocol_dump(c, req->rc); | |
abfa034e | 571 | if (err) { |
5d385153 | 572 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
abfa034e AK |
573 | return err; |
574 | } | |
575 | ||
576 | if (type != P9_RERROR && type != P9_RLERROR) | |
577 | return 0; | |
578 | ||
579 | if (!p9_is_proto_dotl(c)) { | |
580 | /* Error is reported in string format */ | |
42fe6484 AK |
581 | int len; |
582 | /* 7 = header size for RERROR; */ | |
583 | int inline_len = in_hdrlen - 7; | |
abfa034e | 584 | |
42fe6484 AK |
585 | len = req->rc->size - req->rc->offset; |
586 | if (len > (P9_ZC_HDR_SZ - 7)) { | |
587 | err = -EFAULT; | |
abfa034e AK |
588 | goto out_err; |
589 | } | |
abfa034e | 590 | |
42fe6484 AK |
591 | ename = &req->rc->sdata[req->rc->offset]; |
592 | if (len > inline_len) { | |
593 | /* We have error in external buffer */ | |
abfa034e AK |
594 | if (kern_buf) { |
595 | memcpy(ename + inline_len, uidata, | |
596 | len - inline_len); | |
597 | } else { | |
598 | err = copy_from_user(ename + inline_len, | |
599 | uidata, len - inline_len); | |
600 | if (err) { | |
601 | err = -EFAULT; | |
42fe6484 | 602 | goto out_err; |
abfa034e AK |
603 | } |
604 | } | |
605 | } | |
42fe6484 AK |
606 | ename = NULL; |
607 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", | |
608 | &ename, &ecode); | |
609 | if (err) | |
610 | goto out_err; | |
611 | ||
612 | if (p9_is_proto_dotu(c)) | |
abfa034e | 613 | err = -ecode; |
42fe6484 | 614 | |
abfa034e AK |
615 | if (!err || !IS_ERR_VALUE(err)) { |
616 | err = p9_errstr2errno(ename, strlen(ename)); | |
617 | ||
5d385153 JP |
618 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
619 | -ecode, ename); | |
abfa034e AK |
620 | } |
621 | kfree(ename); | |
622 | } else { | |
623 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
624 | err = -ecode; | |
625 | ||
5d385153 | 626 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
abfa034e AK |
627 | } |
628 | return err; | |
629 | ||
abfa034e | 630 | out_err: |
5d385153 | 631 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
abfa034e AK |
632 | return err; |
633 | } | |
634 | ||
aca00763 RL |
635 | static struct p9_req_t * |
636 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
637 | ||
51a87c55 EVH |
638 | /** |
639 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
640 | * @c: client state |
641 | * @oldreq: request to cancel | |
51a87c55 | 642 | * |
aca00763 | 643 | * This sents a flush for a particular request and links |
51a87c55 EVH |
644 | * the flush request to the original request. The current |
645 | * code only supports a single flush request although the protocol | |
646 | * allows for multiple flush requests to be sent for a single request. | |
647 | * | |
648 | */ | |
649 | ||
650 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
651 | { | |
652 | struct p9_req_t *req; | |
653 | int16_t oldtag; | |
654 | int err; | |
655 | ||
656 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
657 | if (err) | |
658 | return err; | |
659 | ||
5d385153 | 660 | p9_debug(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
51a87c55 EVH |
661 | |
662 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
663 | if (IS_ERR(req)) | |
664 | return PTR_ERR(req); | |
665 | ||
1cff3306 SD |
666 | /* |
667 | * if we haven't received a response for oldreq, | |
60ff779c | 668 | * remove it from the list |
1cff3306 | 669 | */ |
0bfd6845 | 670 | if (oldreq->status == REQ_STATUS_SENT) |
afd8d654 SD |
671 | if (c->trans_mod->cancelled) |
672 | c->trans_mod->cancelled(c, oldreq); | |
1bab88b2 LI |
673 | |
674 | p9_free_req(c, req); | |
51a87c55 EVH |
675 | return 0; |
676 | } | |
677 | ||
abfa034e AK |
678 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
679 | int8_t type, int req_size, | |
680 | const char *fmt, va_list ap) | |
91b8534f | 681 | { |
51a87c55 | 682 | int tag, err; |
91b8534f | 683 | struct p9_req_t *req; |
91b8534f | 684 | |
5d385153 | 685 | p9_debug(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 686 | |
6d96d3ab AK |
687 | /* we allow for any status other than disconnected */ |
688 | if (c->status == Disconnected) | |
689 | return ERR_PTR(-EIO); | |
690 | ||
691 | /* if status is begin_disconnected we allow only clunk request */ | |
692 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 693 | return ERR_PTR(-EIO); |
91b8534f | 694 | |
91b8534f | 695 | tag = P9_NOTAG; |
51a87c55 | 696 | if (type != P9_TVERSION) { |
91b8534f EVH |
697 | tag = p9_idpool_get(c->tagpool); |
698 | if (tag < 0) | |
51a87c55 | 699 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
700 | } |
701 | ||
abfa034e | 702 | req = p9_tag_alloc(c, tag, req_size); |
51a87c55 EVH |
703 | if (IS_ERR(req)) |
704 | return req; | |
91b8534f | 705 | |
51a87c55 EVH |
706 | /* marshall the data */ |
707 | p9pdu_prepare(req->tc, tag, type); | |
342fee1d | 708 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe AK |
709 | if (err) |
710 | goto reterr; | |
348b5901 AK |
711 | p9pdu_finalize(c, req->tc); |
712 | trace_9p_client_req(c, type, tag); | |
abfa034e AK |
713 | return req; |
714 | reterr: | |
715 | p9_free_req(c, req); | |
716 | return ERR_PTR(err); | |
717 | } | |
718 | ||
719 | /** | |
720 | * p9_client_rpc - issue a request and wait for a response | |
721 | * @c: client session | |
722 | * @type: type of request | |
723 | * @fmt: protocol format string (see protocol.c) | |
724 | * | |
725 | * Returns request structure (which client must free using p9_free_req) | |
726 | */ | |
727 | ||
728 | static struct p9_req_t * | |
729 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
730 | { | |
731 | va_list ap; | |
732 | int sigpending, err; | |
733 | unsigned long flags; | |
734 | struct p9_req_t *req; | |
735 | ||
736 | va_start(ap, fmt); | |
737 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); | |
738 | va_end(ap); | |
739 | if (IS_ERR(req)) | |
740 | return req; | |
741 | ||
742 | if (signal_pending(current)) { | |
743 | sigpending = 1; | |
744 | clear_thread_flag(TIF_SIGPENDING); | |
745 | } else | |
746 | sigpending = 0; | |
91b8534f EVH |
747 | |
748 | err = c->trans_mod->request(c, req); | |
749 | if (err < 0) { | |
3cd79678 | 750 | if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d | 751 | c->status = Disconnected; |
91b8534f EVH |
752 | goto reterr; |
753 | } | |
a314f274 | 754 | again: |
abfa034e | 755 | /* Wait for the response */ |
91b8534f | 756 | err = wait_event_interruptible(*req->wq, |
abfa034e | 757 | req->status >= REQ_STATUS_RCVD); |
91b8534f | 758 | |
2b6e72ed DM |
759 | /* |
760 | * Make sure our req is coherent with regard to updates in other | |
761 | * threads - echoes to wmb() in the callback | |
762 | */ | |
763 | smp_rmb(); | |
764 | ||
a314f274 JG |
765 | if ((err == -ERESTARTSYS) && (c->status == Connected) |
766 | && (type == P9_TFLUSH)) { | |
767 | sigpending = 1; | |
768 | clear_thread_flag(TIF_SIGPENDING); | |
769 | goto again; | |
770 | } | |
771 | ||
91b8534f | 772 | if (req->status == REQ_STATUS_ERROR) { |
5d385153 | 773 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 774 | err = req->t_err; |
91b8534f | 775 | } |
1bab88b2 | 776 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
5d385153 | 777 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 778 | sigpending = 1; |
91b8534f EVH |
779 | clear_thread_flag(TIF_SIGPENDING); |
780 | ||
1bab88b2 LI |
781 | if (c->trans_mod->cancel(c, req)) |
782 | p9_client_flush(c, req); | |
783 | ||
784 | /* if we received the response anyway, don't signal error */ | |
785 | if (req->status == REQ_STATUS_RCVD) | |
786 | err = 0; | |
91b8534f | 787 | } |
91b8534f EVH |
788 | if (sigpending) { |
789 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
790 | recalc_sigpending(); | |
791 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
792 | } | |
91b8534f EVH |
793 | if (err < 0) |
794 | goto reterr; | |
795 | ||
51a87c55 | 796 | err = p9_check_errors(c, req); |
348b5901 AK |
797 | trace_9p_client_res(c, type, req->rc->tag, err); |
798 | if (!err) | |
51a87c55 | 799 | return req; |
abfa034e | 800 | reterr: |
abfa034e | 801 | p9_free_req(c, req); |
43def35c | 802 | return ERR_PTR(safe_errno(err)); |
abfa034e AK |
803 | } |
804 | ||
805 | /** | |
806 | * p9_client_zc_rpc - issue a request and wait for a response | |
807 | * @c: client session | |
808 | * @type: type of request | |
809 | * @uidata: user bffer that should be ued for zero copy read | |
810 | * @uodata: user buffer that shoud be user for zero copy write | |
811 | * @inlen: read buffer size | |
812 | * @olen: write buffer size | |
813 | * @hdrlen: reader header size, This is the size of response protocol data | |
814 | * @fmt: protocol format string (see protocol.c) | |
815 | * | |
816 | * Returns request structure (which client must free using p9_free_req) | |
817 | */ | |
818 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, | |
819 | char *uidata, char *uodata, | |
820 | int inlen, int olen, int in_hdrlen, | |
821 | int kern_buf, const char *fmt, ...) | |
822 | { | |
823 | va_list ap; | |
824 | int sigpending, err; | |
825 | unsigned long flags; | |
826 | struct p9_req_t *req; | |
827 | ||
828 | va_start(ap, fmt); | |
829 | /* | |
830 | * We allocate a inline protocol data of only 4k bytes. | |
831 | * The actual content is passed in zero-copy fashion. | |
832 | */ | |
833 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); | |
834 | va_end(ap); | |
835 | if (IS_ERR(req)) | |
836 | return req; | |
837 | ||
838 | if (signal_pending(current)) { | |
839 | sigpending = 1; | |
840 | clear_thread_flag(TIF_SIGPENDING); | |
841 | } else | |
842 | sigpending = 0; | |
843 | ||
844 | /* If we are called with KERNEL_DS force kern_buf */ | |
845 | if (segment_eq(get_fs(), KERNEL_DS)) | |
846 | kern_buf = 1; | |
847 | ||
848 | err = c->trans_mod->zc_request(c, req, uidata, uodata, | |
849 | inlen, olen, in_hdrlen, kern_buf); | |
850 | if (err < 0) { | |
851 | if (err == -EIO) | |
852 | c->status = Disconnected; | |
853 | goto reterr; | |
854 | } | |
855 | if (req->status == REQ_STATUS_ERROR) { | |
5d385153 | 856 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
abfa034e AK |
857 | err = req->t_err; |
858 | } | |
859 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
5d385153 | 860 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
abfa034e AK |
861 | sigpending = 1; |
862 | clear_thread_flag(TIF_SIGPENDING); | |
91b8534f | 863 | |
abfa034e AK |
864 | if (c->trans_mod->cancel(c, req)) |
865 | p9_client_flush(c, req); | |
866 | ||
867 | /* if we received the response anyway, don't signal error */ | |
868 | if (req->status == REQ_STATUS_RCVD) | |
869 | err = 0; | |
870 | } | |
871 | if (sigpending) { | |
872 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
873 | recalc_sigpending(); | |
874 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
875 | } | |
876 | if (err < 0) | |
877 | goto reterr; | |
878 | ||
879 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf); | |
348b5901 AK |
880 | trace_9p_client_res(c, type, req->rc->tag, err); |
881 | if (!err) | |
abfa034e | 882 | return req; |
91b8534f EVH |
883 | reterr: |
884 | p9_free_req(c, req); | |
43def35c | 885 | return ERR_PTR(safe_errno(err)); |
91b8534f EVH |
886 | } |
887 | ||
5503ac56 EVH |
888 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
889 | { | |
9f3e9bbe | 890 | int ret; |
5503ac56 | 891 | struct p9_fid *fid; |
cac23d65 | 892 | unsigned long flags; |
5503ac56 | 893 | |
5d385153 | 894 | p9_debug(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
895 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
896 | if (!fid) | |
897 | return ERR_PTR(-ENOMEM); | |
898 | ||
9f3e9bbe | 899 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 900 | if (ret < 0) { |
9f3e9bbe | 901 | ret = -ENOSPC; |
5503ac56 EVH |
902 | goto error; |
903 | } | |
9f3e9bbe | 904 | fid->fid = ret; |
5503ac56 EVH |
905 | |
906 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
907 | fid->mode = -1; | |
f8b9d53a | 908 | fid->uid = current_fsuid(); |
5503ac56 | 909 | fid->clnt = clnt; |
3e2796a9 | 910 | fid->rdir = NULL; |
cac23d65 | 911 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 912 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 913 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
914 | |
915 | return fid; | |
916 | ||
917 | error: | |
918 | kfree(fid); | |
9f3e9bbe | 919 | return ERR_PTR(ret); |
5503ac56 EVH |
920 | } |
921 | ||
922 | static void p9_fid_destroy(struct p9_fid *fid) | |
923 | { | |
924 | struct p9_client *clnt; | |
cac23d65 | 925 | unsigned long flags; |
5503ac56 | 926 | |
5d385153 | 927 | p9_debug(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
928 | clnt = fid->clnt; |
929 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 930 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 931 | list_del(&fid->flist); |
cac23d65 | 932 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 933 | kfree(fid->rdir); |
5503ac56 EVH |
934 | kfree(fid); |
935 | } | |
8a0dc95f | 936 | |
32a875ad | 937 | static int p9_client_version(struct p9_client *c) |
bd238fb4 | 938 | { |
6936bf60 | 939 | int err = 0; |
51a87c55 EVH |
940 | struct p9_req_t *req; |
941 | char *version; | |
942 | int msize; | |
bd238fb4 | 943 | |
5d385153 JP |
944 | p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
945 | c->msize, c->proto_version); | |
c5a7697d SK |
946 | |
947 | switch (c->proto_version) { | |
45bc21ed | 948 | case p9_proto_2000L: |
c5a7697d | 949 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 950 | c->msize, "9P2000.L"); |
c5a7697d SK |
951 | break; |
952 | case p9_proto_2000u: | |
953 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
954 | c->msize, "9P2000.u"); | |
955 | break; | |
956 | case p9_proto_legacy: | |
957 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
958 | c->msize, "9P2000"); | |
959 | break; | |
960 | default: | |
961 | return -EINVAL; | |
c5a7697d SK |
962 | } |
963 | ||
51a87c55 EVH |
964 | if (IS_ERR(req)) |
965 | return PTR_ERR(req); | |
6936bf60 | 966 | |
342fee1d | 967 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 | 968 | if (err) { |
5d385153 | 969 | p9_debug(P9_DEBUG_9P, "version error %d\n", err); |
348b5901 | 970 | trace_9p_protocol_dump(c, req->rc); |
6936bf60 | 971 | goto error; |
51a87c55 | 972 | } |
6936bf60 | 973 | |
5d385153 | 974 | p9_debug(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
975 | if (!strncmp(version, "9P2000.L", 8)) |
976 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 977 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
978 | c->proto_version = p9_proto_2000u; |
979 | else if (!strncmp(version, "9P2000", 6)) | |
980 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
981 | else { |
982 | err = -EREMOTEIO; | |
983 | goto error; | |
984 | } | |
985 | ||
51a87c55 EVH |
986 | if (msize < c->msize) |
987 | c->msize = msize; | |
6936bf60 EVH |
988 | |
989 | error: | |
51a87c55 EVH |
990 | kfree(version); |
991 | p9_free_req(c, req); | |
6936bf60 EVH |
992 | |
993 | return err; | |
994 | } | |
6936bf60 EVH |
995 | |
996 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
997 | { | |
998 | int err; | |
999 | struct p9_client *clnt; | |
50192abe | 1000 | char *client_id; |
6936bf60 EVH |
1001 | |
1002 | err = 0; | |
bd238fb4 LI |
1003 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
1004 | if (!clnt) | |
1005 | return ERR_PTR(-ENOMEM); | |
1006 | ||
72029fe8 | 1007 | clnt->trans_mod = NULL; |
bb8ffdfc | 1008 | clnt->trans = NULL; |
50192abe WD |
1009 | |
1010 | client_id = utsname()->nodename; | |
1011 | memcpy(clnt->name, client_id, strlen(client_id) + 1); | |
1012 | ||
bd238fb4 | 1013 | spin_lock_init(&clnt->lock); |
bd238fb4 | 1014 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 1015 | |
fe1cbaba AK |
1016 | err = p9_tag_init(clnt); |
1017 | if (err < 0) | |
1018 | goto free_client; | |
fea511a6 | 1019 | |
bb8ffdfc EVH |
1020 | err = parse_opts(options, clnt); |
1021 | if (err < 0) | |
fe1cbaba | 1022 | goto destroy_tagpool; |
bb8ffdfc | 1023 | |
a17d1720 AK |
1024 | if (!clnt->trans_mod) |
1025 | clnt->trans_mod = v9fs_get_default_trans(); | |
1026 | ||
8a0dc95f EVH |
1027 | if (clnt->trans_mod == NULL) { |
1028 | err = -EPROTONOSUPPORT; | |
5d385153 JP |
1029 | p9_debug(P9_DEBUG_ERROR, |
1030 | "No transport defined or default transport\n"); | |
fe1cbaba | 1031 | goto destroy_tagpool; |
8781ff94 EVH |
1032 | } |
1033 | ||
1034 | clnt->fidpool = p9_idpool_create(); | |
1035 | if (IS_ERR(clnt->fidpool)) { | |
1036 | err = PTR_ERR(clnt->fidpool); | |
8781ff94 | 1037 | goto put_trans; |
8a0dc95f EVH |
1038 | } |
1039 | ||
5d385153 JP |
1040 | p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
1041 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 1042 | |
8b81ef58 EVH |
1043 | err = clnt->trans_mod->create(clnt, dev_name, options); |
1044 | if (err) | |
8781ff94 | 1045 | goto destroy_fidpool; |
bd238fb4 | 1046 | |
c9ffb05c VJJ |
1047 | if (clnt->msize > clnt->trans_mod->maxsize) |
1048 | clnt->msize = clnt->trans_mod->maxsize; | |
8a0dc95f | 1049 | |
6936bf60 | 1050 | err = p9_client_version(clnt); |
bd238fb4 | 1051 | if (err) |
8781ff94 | 1052 | goto close_trans; |
bd238fb4 | 1053 | |
bd238fb4 LI |
1054 | return clnt; |
1055 | ||
8781ff94 EVH |
1056 | close_trans: |
1057 | clnt->trans_mod->close(clnt); | |
1058 | destroy_fidpool: | |
1059 | p9_idpool_destroy(clnt->fidpool); | |
1060 | put_trans: | |
1061 | v9fs_put_trans(clnt->trans_mod); | |
fe1cbaba AK |
1062 | destroy_tagpool: |
1063 | p9_idpool_destroy(clnt->tagpool); | |
8781ff94 EVH |
1064 | free_client: |
1065 | kfree(clnt); | |
bd238fb4 LI |
1066 | return ERR_PTR(err); |
1067 | } | |
1068 | EXPORT_SYMBOL(p9_client_create); | |
1069 | ||
1070 | void p9_client_destroy(struct p9_client *clnt) | |
1071 | { | |
1072 | struct p9_fid *fid, *fidptr; | |
1073 | ||
5d385153 | 1074 | p9_debug(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 1075 | |
8b81ef58 EVH |
1076 | if (clnt->trans_mod) |
1077 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 1078 | |
72029fe8 TH |
1079 | v9fs_put_trans(clnt->trans_mod); |
1080 | ||
6d96d3ab | 1081 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
5d385153 | 1082 | pr_info("Found fid %d not clunked\n", fid->fid); |
bd238fb4 | 1083 | p9_fid_destroy(fid); |
6d96d3ab | 1084 | } |
bd238fb4 | 1085 | |
0af8887e EVH |
1086 | if (clnt->fidpool) |
1087 | p9_idpool_destroy(clnt->fidpool); | |
1088 | ||
fea511a6 EVH |
1089 | p9_tag_cleanup(clnt); |
1090 | ||
bd238fb4 LI |
1091 | kfree(clnt); |
1092 | } | |
1093 | EXPORT_SYMBOL(p9_client_destroy); | |
1094 | ||
1095 | void p9_client_disconnect(struct p9_client *clnt) | |
1096 | { | |
5d385153 | 1097 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
8b81ef58 | 1098 | clnt->status = Disconnected; |
bd238fb4 LI |
1099 | } |
1100 | EXPORT_SYMBOL(p9_client_disconnect); | |
1101 | ||
6d96d3ab AK |
1102 | void p9_client_begin_disconnect(struct p9_client *clnt) |
1103 | { | |
5d385153 | 1104 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
6d96d3ab AK |
1105 | clnt->status = BeginDisconnect; |
1106 | } | |
1107 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
1108 | ||
bd238fb4 | 1109 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
f791f7c5 | 1110 | char *uname, kuid_t n_uname, char *aname) |
bd238fb4 | 1111 | { |
348b5901 | 1112 | int err = 0; |
51a87c55 | 1113 | struct p9_req_t *req; |
bd238fb4 | 1114 | struct p9_fid *fid; |
51a87c55 | 1115 | struct p9_qid qid; |
bd238fb4 | 1116 | |
bd238fb4 | 1117 | |
5d385153 JP |
1118 | p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
1119 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 LI |
1120 | fid = p9_fid_create(clnt); |
1121 | if (IS_ERR(fid)) { | |
1122 | err = PTR_ERR(fid); | |
1123 | fid = NULL; | |
1124 | goto error; | |
1125 | } | |
1126 | ||
f791f7c5 | 1127 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, |
51a87c55 EVH |
1128 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
1129 | if (IS_ERR(req)) { | |
1130 | err = PTR_ERR(req); | |
bd238fb4 LI |
1131 | goto error; |
1132 | } | |
1133 | ||
342fee1d | 1134 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 1135 | if (err) { |
348b5901 | 1136 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1137 | p9_free_req(clnt, req); |
bd238fb4 | 1138 | goto error; |
51a87c55 | 1139 | } |
bd238fb4 | 1140 | |
5d385153 JP |
1141 | p9_debug(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
1142 | qid.type, (unsigned long long)qid.path, qid.version); | |
51a87c55 EVH |
1143 | |
1144 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
1145 | ||
1146 | p9_free_req(clnt, req); | |
bd238fb4 LI |
1147 | return fid; |
1148 | ||
1149 | error: | |
bd238fb4 LI |
1150 | if (fid) |
1151 | p9_fid_destroy(fid); | |
1152 | return ERR_PTR(err); | |
1153 | } | |
1154 | EXPORT_SYMBOL(p9_client_attach); | |
1155 | ||
b76225e2 HPB |
1156 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
1157 | char **wnames, int clone) | |
bd238fb4 LI |
1158 | { |
1159 | int err; | |
bd238fb4 LI |
1160 | struct p9_client *clnt; |
1161 | struct p9_fid *fid; | |
51a87c55 EVH |
1162 | struct p9_qid *wqids; |
1163 | struct p9_req_t *req; | |
b76225e2 | 1164 | uint16_t nwqids, count; |
bd238fb4 | 1165 | |
bd238fb4 | 1166 | err = 0; |
62b2be59 | 1167 | wqids = NULL; |
bd238fb4 LI |
1168 | clnt = oldfid->clnt; |
1169 | if (clone) { | |
1170 | fid = p9_fid_create(clnt); | |
1171 | if (IS_ERR(fid)) { | |
1172 | err = PTR_ERR(fid); | |
1173 | fid = NULL; | |
1174 | goto error; | |
1175 | } | |
1176 | ||
1177 | fid->uid = oldfid->uid; | |
1178 | } else | |
1179 | fid = oldfid; | |
1180 | ||
51a87c55 | 1181 | |
5d385153 JP |
1182 | p9_debug(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
1183 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
51a87c55 EVH |
1184 | |
1185 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
1186 | nwname, wnames); | |
1187 | if (IS_ERR(req)) { | |
1188 | err = PTR_ERR(req); | |
bd238fb4 LI |
1189 | goto error; |
1190 | } | |
1191 | ||
342fee1d | 1192 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 | 1193 | if (err) { |
348b5901 | 1194 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 | 1195 | p9_free_req(clnt, req); |
51a87c55 | 1196 | goto clunk_fid; |
e7f4b8f1 EVH |
1197 | } |
1198 | p9_free_req(clnt, req); | |
bd238fb4 | 1199 | |
5d385153 | 1200 | p9_debug(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
51a87c55 EVH |
1201 | |
1202 | if (nwqids != nwname) { | |
bd238fb4 LI |
1203 | err = -ENOENT; |
1204 | goto clunk_fid; | |
1205 | } | |
1206 | ||
51a87c55 | 1207 | for (count = 0; count < nwqids; count++) |
5d385153 | 1208 | p9_debug(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
b0d5fdef RD |
1209 | count, wqids[count].type, |
1210 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
1211 | wqids[count].version); |
1212 | ||
bd238fb4 | 1213 | if (nwname) |
51a87c55 | 1214 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
1215 | else |
1216 | fid->qid = oldfid->qid; | |
1217 | ||
62b2be59 | 1218 | kfree(wqids); |
bd238fb4 LI |
1219 | return fid; |
1220 | ||
1221 | clunk_fid: | |
62b2be59 | 1222 | kfree(wqids); |
51a87c55 EVH |
1223 | p9_client_clunk(fid); |
1224 | fid = NULL; | |
bd238fb4 LI |
1225 | |
1226 | error: | |
bd238fb4 LI |
1227 | if (fid && (fid != oldfid)) |
1228 | p9_fid_destroy(fid); | |
1229 | ||
1230 | return ERR_PTR(err); | |
1231 | } | |
1232 | EXPORT_SYMBOL(p9_client_walk); | |
1233 | ||
1234 | int p9_client_open(struct p9_fid *fid, int mode) | |
1235 | { | |
1236 | int err; | |
bd238fb4 | 1237 | struct p9_client *clnt; |
51a87c55 EVH |
1238 | struct p9_req_t *req; |
1239 | struct p9_qid qid; | |
1240 | int iounit; | |
bd238fb4 | 1241 | |
bd238fb4 | 1242 | clnt = fid->clnt; |
5d385153 | 1243 | p9_debug(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
ef56547e MK |
1244 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
1245 | err = 0; | |
bd238fb4 LI |
1246 | |
1247 | if (fid->mode != -1) | |
1248 | return -EINVAL; | |
1249 | ||
ef56547e MK |
1250 | if (p9_is_proto_dotl(clnt)) |
1251 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1252 | else | |
1253 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1254 | if (IS_ERR(req)) { |
1255 | err = PTR_ERR(req); | |
1256 | goto error; | |
bd238fb4 LI |
1257 | } |
1258 | ||
342fee1d | 1259 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1260 | if (err) { |
348b5901 | 1261 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1262 | goto free_and_error; |
1263 | } | |
51a87c55 | 1264 | |
5d385153 | 1265 | p9_debug(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
ef56547e MK |
1266 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
1267 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1268 | |
1269 | fid->mode = mode; | |
51a87c55 | 1270 | fid->iounit = iounit; |
bd238fb4 | 1271 | |
e7f4b8f1 EVH |
1272 | free_and_error: |
1273 | p9_free_req(clnt, req); | |
51a87c55 | 1274 | error: |
bd238fb4 LI |
1275 | return err; |
1276 | } | |
1277 | EXPORT_SYMBOL(p9_client_open); | |
1278 | ||
5643135a | 1279 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
f791f7c5 | 1280 | kgid_t gid, struct p9_qid *qid) |
5643135a VJJ |
1281 | { |
1282 | int err = 0; | |
1283 | struct p9_client *clnt; | |
1284 | struct p9_req_t *req; | |
1285 | int iounit; | |
1286 | ||
5d385153 | 1287 | p9_debug(P9_DEBUG_9P, |
5643135a | 1288 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
f791f7c5 EB |
1289 | ofid->fid, name, flags, mode, |
1290 | from_kgid(&init_user_ns, gid)); | |
5643135a VJJ |
1291 | clnt = ofid->clnt; |
1292 | ||
1293 | if (ofid->mode != -1) | |
1294 | return -EINVAL; | |
1295 | ||
f791f7c5 | 1296 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, |
5643135a VJJ |
1297 | mode, gid); |
1298 | if (IS_ERR(req)) { | |
1299 | err = PTR_ERR(req); | |
1300 | goto error; | |
1301 | } | |
1302 | ||
1303 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1304 | if (err) { | |
348b5901 | 1305 | trace_9p_protocol_dump(clnt, req->rc); |
5643135a VJJ |
1306 | goto free_and_error; |
1307 | } | |
1308 | ||
5d385153 | 1309 | p9_debug(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
5643135a VJJ |
1310 | qid->type, |
1311 | (unsigned long long)qid->path, | |
1312 | qid->version, iounit); | |
1313 | ||
1314 | ofid->mode = mode; | |
1315 | ofid->iounit = iounit; | |
1316 | ||
1317 | free_and_error: | |
1318 | p9_free_req(clnt, req); | |
1319 | error: | |
1320 | return err; | |
1321 | } | |
1322 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1323 | ||
bd238fb4 LI |
1324 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1325 | char *extension) | |
1326 | { | |
1327 | int err; | |
bd238fb4 | 1328 | struct p9_client *clnt; |
51a87c55 EVH |
1329 | struct p9_req_t *req; |
1330 | struct p9_qid qid; | |
1331 | int iounit; | |
bd238fb4 | 1332 | |
5d385153 | 1333 | p9_debug(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
51a87c55 | 1334 | fid->fid, name, perm, mode); |
bd238fb4 | 1335 | err = 0; |
bd238fb4 LI |
1336 | clnt = fid->clnt; |
1337 | ||
1338 | if (fid->mode != -1) | |
1339 | return -EINVAL; | |
1340 | ||
51a87c55 EVH |
1341 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1342 | mode, extension); | |
1343 | if (IS_ERR(req)) { | |
1344 | err = PTR_ERR(req); | |
1345 | goto error; | |
bd238fb4 LI |
1346 | } |
1347 | ||
342fee1d | 1348 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1349 | if (err) { |
348b5901 | 1350 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1351 | goto free_and_error; |
1352 | } | |
51a87c55 | 1353 | |
5d385153 | 1354 | p9_debug(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
b0d5fdef RD |
1355 | qid.type, |
1356 | (unsigned long long)qid.path, | |
1357 | qid.version, iounit); | |
bd238fb4 LI |
1358 | |
1359 | fid->mode = mode; | |
51a87c55 | 1360 | fid->iounit = iounit; |
bd238fb4 | 1361 | |
e7f4b8f1 EVH |
1362 | free_and_error: |
1363 | p9_free_req(clnt, req); | |
51a87c55 | 1364 | error: |
bd238fb4 LI |
1365 | return err; |
1366 | } | |
1367 | EXPORT_SYMBOL(p9_client_fcreate); | |
1368 | ||
f791f7c5 | 1369 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, kgid_t gid, |
50cc42ff VJJ |
1370 | struct p9_qid *qid) |
1371 | { | |
1372 | int err = 0; | |
1373 | struct p9_client *clnt; | |
1374 | struct p9_req_t *req; | |
1375 | ||
5d385153 | 1376 | p9_debug(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
50cc42ff VJJ |
1377 | dfid->fid, name, symtgt); |
1378 | clnt = dfid->clnt; | |
1379 | ||
f791f7c5 | 1380 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, |
50cc42ff VJJ |
1381 | gid); |
1382 | if (IS_ERR(req)) { | |
1383 | err = PTR_ERR(req); | |
1384 | goto error; | |
1385 | } | |
1386 | ||
1387 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1388 | if (err) { | |
348b5901 | 1389 | trace_9p_protocol_dump(clnt, req->rc); |
50cc42ff VJJ |
1390 | goto free_and_error; |
1391 | } | |
1392 | ||
5d385153 | 1393 | p9_debug(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
50cc42ff VJJ |
1394 | qid->type, (unsigned long long)qid->path, qid->version); |
1395 | ||
1396 | free_and_error: | |
1397 | p9_free_req(clnt, req); | |
1398 | error: | |
1399 | return err; | |
1400 | } | |
1401 | EXPORT_SYMBOL(p9_client_symlink); | |
1402 | ||
652df9a7 VJJ |
1403 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1404 | { | |
1405 | struct p9_client *clnt; | |
1406 | struct p9_req_t *req; | |
1407 | ||
5d385153 | 1408 | p9_debug(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
652df9a7 VJJ |
1409 | dfid->fid, oldfid->fid, newname); |
1410 | clnt = dfid->clnt; | |
1411 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1412 | newname); | |
1413 | if (IS_ERR(req)) | |
1414 | return PTR_ERR(req); | |
1415 | ||
5d385153 | 1416 | p9_debug(P9_DEBUG_9P, "<<< RLINK\n"); |
652df9a7 VJJ |
1417 | p9_free_req(clnt, req); |
1418 | return 0; | |
1419 | } | |
1420 | EXPORT_SYMBOL(p9_client_link); | |
1421 | ||
b165d601 | 1422 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc VJJ |
1423 | { |
1424 | int err; | |
1425 | struct p9_client *clnt; | |
1426 | struct p9_req_t *req; | |
1427 | ||
5d385153 | 1428 | p9_debug(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
b165d601 | 1429 | fid->fid, datasync); |
920e65dc VJJ |
1430 | err = 0; |
1431 | clnt = fid->clnt; | |
1432 | ||
b165d601 | 1433 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc VJJ |
1434 | if (IS_ERR(req)) { |
1435 | err = PTR_ERR(req); | |
1436 | goto error; | |
1437 | } | |
1438 | ||
5d385153 | 1439 | p9_debug(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
920e65dc VJJ |
1440 | |
1441 | p9_free_req(clnt, req); | |
1442 | ||
1443 | error: | |
1444 | return err; | |
1445 | } | |
1446 | EXPORT_SYMBOL(p9_client_fsync); | |
1447 | ||
bd238fb4 LI |
1448 | int p9_client_clunk(struct p9_fid *fid) |
1449 | { | |
1450 | int err; | |
bd238fb4 | 1451 | struct p9_client *clnt; |
51a87c55 | 1452 | struct p9_req_t *req; |
208f3c28 | 1453 | int retries = 0; |
bd238fb4 | 1454 | |
8e44a080 | 1455 | if (!fid) { |
5d385153 JP |
1456 | pr_warn("%s (%d): Trying to clunk with NULL fid\n", |
1457 | __func__, task_pid_nr(current)); | |
8e44a080 | 1458 | dump_stack(); |
1459 | return 0; | |
1460 | } | |
1461 | ||
208f3c28 JG |
1462 | again: |
1463 | p9_debug(P9_DEBUG_9P, ">>> TCLUNK fid %d (try %d)\n", fid->fid, | |
1464 | retries); | |
bd238fb4 | 1465 | err = 0; |
bd238fb4 LI |
1466 | clnt = fid->clnt; |
1467 | ||
51a87c55 EVH |
1468 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1469 | if (IS_ERR(req)) { | |
1470 | err = PTR_ERR(req); | |
1471 | goto error; | |
bd238fb4 LI |
1472 | } |
1473 | ||
5d385153 | 1474 | p9_debug(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1475 | |
51a87c55 | 1476 | p9_free_req(clnt, req); |
51a87c55 | 1477 | error: |
5034990e AK |
1478 | /* |
1479 | * Fid is not valid even after a failed clunk | |
208f3c28 JG |
1480 | * If interrupted, retry once then give up and |
1481 | * leak fid until umount. | |
5034990e | 1482 | */ |
208f3c28 JG |
1483 | if (err == -ERESTARTSYS) { |
1484 | if (retries++ == 0) | |
1485 | goto again; | |
1486 | } else | |
1487 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1488 | return err; |
1489 | } | |
1490 | EXPORT_SYMBOL(p9_client_clunk); | |
1491 | ||
1492 | int p9_client_remove(struct p9_fid *fid) | |
1493 | { | |
1494 | int err; | |
bd238fb4 | 1495 | struct p9_client *clnt; |
51a87c55 | 1496 | struct p9_req_t *req; |
bd238fb4 | 1497 | |
5d385153 | 1498 | p9_debug(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1499 | err = 0; |
bd238fb4 LI |
1500 | clnt = fid->clnt; |
1501 | ||
51a87c55 EVH |
1502 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1503 | if (IS_ERR(req)) { | |
1504 | err = PTR_ERR(req); | |
1505 | goto error; | |
bd238fb4 LI |
1506 | } |
1507 | ||
5d385153 | 1508 | p9_debug(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1509 | |
51a87c55 | 1510 | p9_free_req(clnt, req); |
51a87c55 | 1511 | error: |
208f3c28 JG |
1512 | if (err == -ERESTARTSYS) |
1513 | p9_client_clunk(fid); | |
1514 | else | |
1515 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1516 | return err; |
1517 | } | |
1518 | EXPORT_SYMBOL(p9_client_remove); | |
1519 | ||
48e370ff AK |
1520 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
1521 | { | |
1522 | int err = 0; | |
1523 | struct p9_req_t *req; | |
1524 | struct p9_client *clnt; | |
1525 | ||
5d385153 | 1526 | p9_debug(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", |
48e370ff AK |
1527 | dfid->fid, name, flags); |
1528 | ||
1529 | clnt = dfid->clnt; | |
1530 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); | |
1531 | if (IS_ERR(req)) { | |
1532 | err = PTR_ERR(req); | |
1533 | goto error; | |
1534 | } | |
5d385153 | 1535 | p9_debug(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); |
48e370ff AK |
1536 | |
1537 | p9_free_req(clnt, req); | |
1538 | error: | |
1539 | return err; | |
1540 | } | |
1541 | EXPORT_SYMBOL(p9_client_unlinkat); | |
1542 | ||
0fc9655e EVH |
1543 | int |
1544 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1545 | u32 count) | |
bd238fb4 | 1546 | { |
51a87c55 | 1547 | char *dataptr; |
abfa034e AK |
1548 | int kernel_buf = 0; |
1549 | struct p9_req_t *req; | |
1550 | struct p9_client *clnt; | |
1551 | int err, rsize, non_zc = 0; | |
1552 | ||
bd238fb4 | 1553 | |
5d385153 | 1554 | p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
95c96174 | 1555 | fid->fid, (unsigned long long) offset, count); |
bd238fb4 | 1556 | err = 0; |
bd238fb4 | 1557 | clnt = fid->clnt; |
bd238fb4 LI |
1558 | |
1559 | rsize = fid->iounit; | |
1560 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1561 | rsize = clnt->msize - P9_IOHDRSZ; | |
1562 | ||
51a87c55 EVH |
1563 | if (count < rsize) |
1564 | rsize = count; | |
bd238fb4 | 1565 | |
aca00763 | 1566 | /* Don't bother zerocopy for small IO (< 1024) */ |
abfa034e AK |
1567 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
1568 | char *indata; | |
1569 | if (data) { | |
1570 | kernel_buf = 1; | |
1571 | indata = data; | |
1572 | } else | |
f07d9010 | 1573 | indata = (__force char *)udata; |
abfa034e AK |
1574 | /* |
1575 | * response header len is 11 | |
1576 | * PDU Header(7) + IO Size (4) | |
1577 | */ | |
1578 | req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0, | |
1579 | 11, kernel_buf, "dqd", fid->fid, | |
1580 | offset, rsize); | |
bb2f8a55 | 1581 | } else { |
abfa034e | 1582 | non_zc = 1; |
bb2f8a55 | 1583 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, |
abfa034e | 1584 | rsize); |
bb2f8a55 | 1585 | } |
51a87c55 EVH |
1586 | if (IS_ERR(req)) { |
1587 | err = PTR_ERR(req); | |
1588 | goto error; | |
1589 | } | |
bd238fb4 | 1590 | |
342fee1d | 1591 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 | 1592 | if (err) { |
348b5901 | 1593 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1594 | goto free_and_error; |
e7f4b8f1 | 1595 | } |
bd238fb4 | 1596 | |
5d385153 | 1597 | p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1598 | |
abfa034e | 1599 | if (non_zc) { |
bb2f8a55 VJJ |
1600 | if (data) { |
1601 | memmove(data, dataptr, count); | |
1602 | } else { | |
1603 | err = copy_to_user(udata, dataptr, count); | |
1604 | if (err) { | |
1605 | err = -EFAULT; | |
1606 | goto free_and_error; | |
1607 | } | |
bd238fb4 | 1608 | } |
51a87c55 | 1609 | } |
51a87c55 EVH |
1610 | p9_free_req(clnt, req); |
1611 | return count; | |
bd238fb4 | 1612 | |
51a87c55 EVH |
1613 | free_and_error: |
1614 | p9_free_req(clnt, req); | |
bd238fb4 | 1615 | error: |
bd238fb4 LI |
1616 | return err; |
1617 | } | |
0fc9655e | 1618 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1619 | |
1620 | int | |
0fc9655e EVH |
1621 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1622 | u64 offset, u32 count) | |
bd238fb4 | 1623 | { |
095d3da6 | 1624 | int err, rsize; |
abfa034e | 1625 | int kernel_buf = 0; |
bd238fb4 | 1626 | struct p9_client *clnt; |
51a87c55 | 1627 | struct p9_req_t *req; |
bd238fb4 | 1628 | |
5d385153 | 1629 | p9_debug(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
95c96174 | 1630 | fid->fid, (unsigned long long) offset, count); |
bd238fb4 | 1631 | err = 0; |
bd238fb4 | 1632 | clnt = fid->clnt; |
bd238fb4 LI |
1633 | |
1634 | rsize = fid->iounit; | |
1635 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1636 | rsize = clnt->msize - P9_IOHDRSZ; | |
1637 | ||
51a87c55 EVH |
1638 | if (count < rsize) |
1639 | rsize = count; | |
1fc52481 | 1640 | |
abfa034e AK |
1641 | /* Don't bother zerocopy for small IO (< 1024) */ |
1642 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1643 | char *odata; | |
1644 | if (data) { | |
1645 | kernel_buf = 1; | |
1646 | odata = data; | |
1647 | } else | |
1648 | odata = (char *)udata; | |
1649 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize, | |
1650 | P9_ZC_HDR_SZ, kernel_buf, "dqd", | |
1651 | fid->fid, offset, rsize); | |
1fc52481 | 1652 | } else { |
1fc52481 VJJ |
1653 | if (data) |
1654 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, | |
abfa034e | 1655 | offset, rsize, data); |
1fc52481 VJJ |
1656 | else |
1657 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, | |
abfa034e | 1658 | offset, rsize, udata); |
1fc52481 | 1659 | } |
51a87c55 EVH |
1660 | if (IS_ERR(req)) { |
1661 | err = PTR_ERR(req); | |
1662 | goto error; | |
1663 | } | |
0fc9655e | 1664 | |
342fee1d | 1665 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 | 1666 | if (err) { |
348b5901 | 1667 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1668 | goto free_and_error; |
e7f4b8f1 EVH |
1669 | } |
1670 | ||
5d385153 | 1671 | p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1672 | |
51a87c55 EVH |
1673 | p9_free_req(clnt, req); |
1674 | return count; | |
bd238fb4 | 1675 | |
51a87c55 EVH |
1676 | free_and_error: |
1677 | p9_free_req(clnt, req); | |
bd238fb4 | 1678 | error: |
bd238fb4 LI |
1679 | return err; |
1680 | } | |
0fc9655e | 1681 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1682 | |
51a87c55 | 1683 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1684 | { |
51a87c55 EVH |
1685 | int err; |
1686 | struct p9_client *clnt; | |
1687 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1688 | struct p9_req_t *req; | |
1689 | u16 ignored; | |
5503ac56 | 1690 | |
5d385153 | 1691 | p9_debug(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1692 | |
5503ac56 EVH |
1693 | if (!ret) |
1694 | return ERR_PTR(-ENOMEM); | |
1695 | ||
bd238fb4 | 1696 | err = 0; |
bd238fb4 LI |
1697 | clnt = fid->clnt; |
1698 | ||
51a87c55 EVH |
1699 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1700 | if (IS_ERR(req)) { | |
1701 | err = PTR_ERR(req); | |
bd238fb4 LI |
1702 | goto error; |
1703 | } | |
1704 | ||
342fee1d | 1705 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1706 | if (err) { |
348b5901 | 1707 | trace_9p_protocol_dump(clnt, req->rc); |
eedfe1c4 AK |
1708 | p9_free_req(clnt, req); |
1709 | goto error; | |
e7f4b8f1 | 1710 | } |
bd238fb4 | 1711 | |
5d385153 | 1712 | p9_debug(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1713 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1714 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1715 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1716 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1717 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1718 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1719 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1720 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
447c5094 EB |
1721 | from_kuid(&init_user_ns, ret->n_uid), |
1722 | from_kgid(&init_user_ns, ret->n_gid), | |
1723 | from_kuid(&init_user_ns, ret->n_muid)); | |
bd238fb4 | 1724 | |
742b11a7 LI |
1725 | p9_free_req(clnt, req); |
1726 | return ret; | |
1727 | ||
bd238fb4 | 1728 | error: |
742b11a7 LI |
1729 | kfree(ret); |
1730 | return ERR_PTR(err); | |
bd238fb4 LI |
1731 | } |
1732 | EXPORT_SYMBOL(p9_client_stat); | |
1733 | ||
f0853122 SK |
1734 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1735 | u64 request_mask) | |
1736 | { | |
1737 | int err; | |
1738 | struct p9_client *clnt; | |
1739 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1740 | GFP_KERNEL); | |
1741 | struct p9_req_t *req; | |
1742 | ||
5d385153 | 1743 | p9_debug(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
f0853122 SK |
1744 | fid->fid, request_mask); |
1745 | ||
1746 | if (!ret) | |
1747 | return ERR_PTR(-ENOMEM); | |
1748 | ||
1749 | err = 0; | |
1750 | clnt = fid->clnt; | |
1751 | ||
1752 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1753 | if (IS_ERR(req)) { | |
1754 | err = PTR_ERR(req); | |
1755 | goto error; | |
1756 | } | |
1757 | ||
1758 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1759 | if (err) { | |
348b5901 | 1760 | trace_9p_protocol_dump(clnt, req->rc); |
f0853122 SK |
1761 | p9_free_req(clnt, req); |
1762 | goto error; | |
1763 | } | |
1764 | ||
5d385153 | 1765 | p9_debug(P9_DEBUG_9P, |
f0853122 SK |
1766 | "<<< RGETATTR st_result_mask=%lld\n" |
1767 | "<<< qid=%x.%llx.%x\n" | |
1768 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1769 | "<<< st_uid=%d st_gid=%d\n" | |
1770 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1771 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1772 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1773 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1774 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1775 | "<<< st_gen=%lld st_data_version=%lld", | |
1776 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
447c5094 EB |
1777 | ret->qid.version, ret->st_mode, ret->st_nlink, |
1778 | from_kuid(&init_user_ns, ret->st_uid), | |
1779 | from_kgid(&init_user_ns, ret->st_gid), | |
1780 | ret->st_rdev, ret->st_size, ret->st_blksize, | |
f0853122 SK |
1781 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
1782 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1783 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1784 | ret->st_gen, ret->st_data_version); | |
1785 | ||
1786 | p9_free_req(clnt, req); | |
1787 | return ret; | |
1788 | ||
1789 | error: | |
1790 | kfree(ret); | |
1791 | return ERR_PTR(err); | |
1792 | } | |
1793 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1794 | ||
342fee1d | 1795 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1796 | { |
1797 | int ret; | |
1798 | ||
9d6939da | 1799 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1800 | /* size[2] type[2] dev[4] qid[13] */ |
1801 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1802 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1803 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1804 | |
1805 | if (wst->name) | |
1806 | ret += strlen(wst->name); | |
1807 | if (wst->uid) | |
1808 | ret += strlen(wst->uid); | |
1809 | if (wst->gid) | |
1810 | ret += strlen(wst->gid); | |
1811 | if (wst->muid) | |
1812 | ret += strlen(wst->muid); | |
1813 | ||
c56e4acf SK |
1814 | if ((proto_version == p9_proto_2000u) || |
1815 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1816 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1817 | if (wst->extension) | |
1818 | ret += strlen(wst->extension); | |
1819 | } | |
1820 | ||
1821 | return ret; | |
1822 | } | |
1823 | ||
bd238fb4 LI |
1824 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1825 | { | |
1826 | int err; | |
51a87c55 | 1827 | struct p9_req_t *req; |
bd238fb4 LI |
1828 | struct p9_client *clnt; |
1829 | ||
453ed90d LI |
1830 | err = 0; |
1831 | clnt = fid->clnt; | |
342fee1d | 1832 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
5d385153 JP |
1833 | p9_debug(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
1834 | p9_debug(P9_DEBUG_9P, | |
e7f4b8f1 EVH |
1835 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1836 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1837 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1838 | " uid=%d gid=%d n_muid=%d\n", | |
1839 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1840 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1841 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1842 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
447c5094 EB |
1843 | from_kuid(&init_user_ns, wst->n_uid), |
1844 | from_kgid(&init_user_ns, wst->n_gid), | |
1845 | from_kuid(&init_user_ns, wst->n_muid)); | |
bd238fb4 | 1846 | |
9d6939da | 1847 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1848 | if (IS_ERR(req)) { |
1849 | err = PTR_ERR(req); | |
1850 | goto error; | |
bd238fb4 LI |
1851 | } |
1852 | ||
5d385153 | 1853 | p9_debug(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1854 | |
51a87c55 EVH |
1855 | p9_free_req(clnt, req); |
1856 | error: | |
bd238fb4 LI |
1857 | return err; |
1858 | } | |
1859 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1860 | |
87d7845a SK |
1861 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1862 | { | |
1863 | int err; | |
1864 | struct p9_req_t *req; | |
1865 | struct p9_client *clnt; | |
1866 | ||
1867 | err = 0; | |
1868 | clnt = fid->clnt; | |
5d385153 JP |
1869 | p9_debug(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
1870 | p9_debug(P9_DEBUG_9P, | |
87d7845a SK |
1871 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
1872 | " atime_sec=%lld atime_nsec=%lld\n" | |
1873 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
447c5094 EB |
1874 | p9attr->valid, p9attr->mode, |
1875 | from_kuid(&init_user_ns, p9attr->uid), | |
1876 | from_kgid(&init_user_ns, p9attr->gid), | |
87d7845a SK |
1877 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
1878 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1879 | ||
1880 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1881 | ||
1882 | if (IS_ERR(req)) { | |
1883 | err = PTR_ERR(req); | |
1884 | goto error; | |
1885 | } | |
5d385153 | 1886 | p9_debug(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
87d7845a SK |
1887 | p9_free_req(clnt, req); |
1888 | error: | |
1889 | return err; | |
1890 | } | |
1891 | EXPORT_SYMBOL(p9_client_setattr); | |
1892 | ||
bda8e775 SK |
1893 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1894 | { | |
1895 | int err; | |
1896 | struct p9_req_t *req; | |
1897 | struct p9_client *clnt; | |
1898 | ||
1899 | err = 0; | |
1900 | clnt = fid->clnt; | |
1901 | ||
5d385153 | 1902 | p9_debug(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
bda8e775 SK |
1903 | |
1904 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1905 | if (IS_ERR(req)) { | |
1906 | err = PTR_ERR(req); | |
1907 | goto error; | |
1908 | } | |
1909 | ||
1910 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1911 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1912 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1913 | if (err) { | |
348b5901 | 1914 | trace_9p_protocol_dump(clnt, req->rc); |
bda8e775 SK |
1915 | p9_free_req(clnt, req); |
1916 | goto error; | |
1917 | } | |
1918 | ||
5d385153 | 1919 | p9_debug(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
bda8e775 SK |
1920 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
1921 | "fsid %llu namelen %ld\n", | |
1922 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1923 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1924 | sb->fsid, (long int)sb->namelen); | |
1925 | ||
1926 | p9_free_req(clnt, req); | |
1927 | error: | |
1928 | return err; | |
1929 | } | |
1930 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda | 1931 | |
9e8fb38e AK |
1932 | int p9_client_rename(struct p9_fid *fid, |
1933 | struct p9_fid *newdirfid, const char *name) | |
4681dbda SK |
1934 | { |
1935 | int err; | |
1936 | struct p9_req_t *req; | |
1937 | struct p9_client *clnt; | |
1938 | ||
1939 | err = 0; | |
1940 | clnt = fid->clnt; | |
1941 | ||
5d385153 | 1942 | p9_debug(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
4681dbda SK |
1943 | fid->fid, newdirfid->fid, name); |
1944 | ||
1945 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1946 | newdirfid->fid, name); | |
1947 | if (IS_ERR(req)) { | |
1948 | err = PTR_ERR(req); | |
1949 | goto error; | |
1950 | } | |
1951 | ||
5d385153 | 1952 | p9_debug(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
4681dbda SK |
1953 | |
1954 | p9_free_req(clnt, req); | |
1955 | error: | |
1956 | return err; | |
1957 | } | |
1958 | EXPORT_SYMBOL(p9_client_rename); | |
1959 | ||
9e8fb38e AK |
1960 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
1961 | struct p9_fid *newdirfid, const char *new_name) | |
1962 | { | |
1963 | int err; | |
1964 | struct p9_req_t *req; | |
1965 | struct p9_client *clnt; | |
1966 | ||
1967 | err = 0; | |
1968 | clnt = olddirfid->clnt; | |
1969 | ||
5d385153 | 1970 | p9_debug(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
9e8fb38e AK |
1971 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, |
1972 | newdirfid->fid, new_name); | |
1973 | ||
1974 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, | |
1975 | old_name, newdirfid->fid, new_name); | |
1976 | if (IS_ERR(req)) { | |
1977 | err = PTR_ERR(req); | |
1978 | goto error; | |
1979 | } | |
1980 | ||
5d385153 | 1981 | p9_debug(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", |
9e8fb38e AK |
1982 | newdirfid->fid, new_name); |
1983 | ||
1984 | p9_free_req(clnt, req); | |
1985 | error: | |
1986 | return err; | |
1987 | } | |
1988 | EXPORT_SYMBOL(p9_client_renameat); | |
1989 | ||
0ef63f34 AK |
1990 | /* |
1991 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1992 | */ | |
1993 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1994 | const char *attr_name, u64 *attr_size) | |
1995 | { | |
1996 | int err; | |
1997 | struct p9_req_t *req; | |
1998 | struct p9_client *clnt; | |
1999 | struct p9_fid *attr_fid; | |
2000 | ||
2001 | err = 0; | |
2002 | clnt = file_fid->clnt; | |
2003 | attr_fid = p9_fid_create(clnt); | |
2004 | if (IS_ERR(attr_fid)) { | |
2005 | err = PTR_ERR(attr_fid); | |
2006 | attr_fid = NULL; | |
2007 | goto error; | |
2008 | } | |
5d385153 | 2009 | p9_debug(P9_DEBUG_9P, |
0ef63f34 AK |
2010 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
2011 | file_fid->fid, attr_fid->fid, attr_name); | |
2012 | ||
2013 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
2014 | file_fid->fid, attr_fid->fid, attr_name); | |
2015 | if (IS_ERR(req)) { | |
2016 | err = PTR_ERR(req); | |
2017 | goto error; | |
2018 | } | |
2019 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
2020 | if (err) { | |
348b5901 | 2021 | trace_9p_protocol_dump(clnt, req->rc); |
0ef63f34 AK |
2022 | p9_free_req(clnt, req); |
2023 | goto clunk_fid; | |
2024 | } | |
2025 | p9_free_req(clnt, req); | |
5d385153 | 2026 | p9_debug(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
0ef63f34 AK |
2027 | attr_fid->fid, *attr_size); |
2028 | return attr_fid; | |
2029 | clunk_fid: | |
2030 | p9_client_clunk(attr_fid); | |
2031 | attr_fid = NULL; | |
2032 | error: | |
2033 | if (attr_fid && (attr_fid != file_fid)) | |
2034 | p9_fid_destroy(attr_fid); | |
2035 | ||
2036 | return ERR_PTR(err); | |
2037 | } | |
2038 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
2039 | ||
eda25e46 AK |
2040 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
2041 | u64 attr_size, int flags) | |
2042 | { | |
2043 | int err; | |
2044 | struct p9_req_t *req; | |
2045 | struct p9_client *clnt; | |
2046 | ||
5d385153 | 2047 | p9_debug(P9_DEBUG_9P, |
eda25e46 AK |
2048 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
2049 | fid->fid, name, (long long)attr_size, flags); | |
2050 | err = 0; | |
2051 | clnt = fid->clnt; | |
2052 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
2053 | fid->fid, name, attr_size, flags); | |
2054 | if (IS_ERR(req)) { | |
2055 | err = PTR_ERR(req); | |
2056 | goto error; | |
2057 | } | |
5d385153 | 2058 | p9_debug(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
eda25e46 AK |
2059 | p9_free_req(clnt, req); |
2060 | error: | |
2061 | return err; | |
2062 | } | |
2063 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
2064 | ||
7751bdb3 SK |
2065 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
2066 | { | |
abfa034e | 2067 | int err, rsize, non_zc = 0; |
7751bdb3 SK |
2068 | struct p9_client *clnt; |
2069 | struct p9_req_t *req; | |
2070 | char *dataptr; | |
2071 | ||
5d385153 | 2072 | p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
95c96174 | 2073 | fid->fid, (unsigned long long) offset, count); |
7751bdb3 SK |
2074 | |
2075 | err = 0; | |
2076 | clnt = fid->clnt; | |
7751bdb3 SK |
2077 | |
2078 | rsize = fid->iounit; | |
2079 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
2080 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
2081 | ||
2082 | if (count < rsize) | |
2083 | rsize = count; | |
2084 | ||
abfa034e AK |
2085 | /* Don't bother zerocopy for small IO (< 1024) */ |
2086 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
2087 | /* | |
2088 | * response header len is 11 | |
2089 | * PDU Header(7) + IO Size (4) | |
2090 | */ | |
2091 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0, | |
2092 | 11, 1, "dqd", fid->fid, offset, rsize); | |
2c66523f | 2093 | } else { |
abfa034e | 2094 | non_zc = 1; |
2c66523f | 2095 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e | 2096 | offset, rsize); |
2c66523f | 2097 | } |
7751bdb3 SK |
2098 | if (IS_ERR(req)) { |
2099 | err = PTR_ERR(req); | |
2100 | goto error; | |
2101 | } | |
2102 | ||
2103 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
2104 | if (err) { | |
348b5901 | 2105 | trace_9p_protocol_dump(clnt, req->rc); |
7751bdb3 SK |
2106 | goto free_and_error; |
2107 | } | |
2108 | ||
5d385153 | 2109 | p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
7751bdb3 | 2110 | |
abfa034e | 2111 | if (non_zc) |
7751bdb3 SK |
2112 | memmove(data, dataptr, count); |
2113 | ||
2114 | p9_free_req(clnt, req); | |
2115 | return count; | |
2116 | ||
2117 | free_and_error: | |
2118 | p9_free_req(clnt, req); | |
2119 | error: | |
2120 | return err; | |
2121 | } | |
2122 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
2123 | |
2124 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
f791f7c5 | 2125 | dev_t rdev, kgid_t gid, struct p9_qid *qid) |
4b43516a MK |
2126 | { |
2127 | int err; | |
2128 | struct p9_client *clnt; | |
2129 | struct p9_req_t *req; | |
2130 | ||
2131 | err = 0; | |
2132 | clnt = fid->clnt; | |
5d385153 | 2133 | p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
4b43516a | 2134 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
f791f7c5 | 2135 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, |
4b43516a MK |
2136 | MAJOR(rdev), MINOR(rdev), gid); |
2137 | if (IS_ERR(req)) | |
2138 | return PTR_ERR(req); | |
2139 | ||
2140 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2141 | if (err) { | |
348b5901 | 2142 | trace_9p_protocol_dump(clnt, req->rc); |
4b43516a MK |
2143 | goto error; |
2144 | } | |
5d385153 | 2145 | p9_debug(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
4b43516a MK |
2146 | (unsigned long long)qid->path, qid->version); |
2147 | ||
2148 | error: | |
2149 | p9_free_req(clnt, req); | |
2150 | return err; | |
2151 | ||
2152 | } | |
2153 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
2154 | |
2155 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
f791f7c5 | 2156 | kgid_t gid, struct p9_qid *qid) |
01a622bd MK |
2157 | { |
2158 | int err; | |
2159 | struct p9_client *clnt; | |
2160 | struct p9_req_t *req; | |
2161 | ||
2162 | err = 0; | |
2163 | clnt = fid->clnt; | |
5d385153 | 2164 | p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
f791f7c5 EB |
2165 | fid->fid, name, mode, from_kgid(&init_user_ns, gid)); |
2166 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, | |
01a622bd MK |
2167 | gid); |
2168 | if (IS_ERR(req)) | |
2169 | return PTR_ERR(req); | |
2170 | ||
2171 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2172 | if (err) { | |
348b5901 | 2173 | trace_9p_protocol_dump(clnt, req->rc); |
01a622bd MK |
2174 | goto error; |
2175 | } | |
5d385153 | 2176 | p9_debug(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
01a622bd MK |
2177 | (unsigned long long)qid->path, qid->version); |
2178 | ||
2179 | error: | |
2180 | p9_free_req(clnt, req); | |
2181 | return err; | |
2182 | ||
2183 | } | |
2184 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
a099027c MK |
2185 | |
2186 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
2187 | { | |
2188 | int err; | |
2189 | struct p9_client *clnt; | |
2190 | struct p9_req_t *req; | |
2191 | ||
2192 | err = 0; | |
2193 | clnt = fid->clnt; | |
5d385153 | 2194 | p9_debug(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
a099027c MK |
2195 | "start %lld length %lld proc_id %d client_id %s\n", |
2196 | fid->fid, flock->type, flock->flags, flock->start, | |
2197 | flock->length, flock->proc_id, flock->client_id); | |
2198 | ||
2199 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
2200 | flock->flags, flock->start, flock->length, | |
2201 | flock->proc_id, flock->client_id); | |
2202 | ||
2203 | if (IS_ERR(req)) | |
2204 | return PTR_ERR(req); | |
2205 | ||
2206 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
2207 | if (err) { | |
348b5901 | 2208 | trace_9p_protocol_dump(clnt, req->rc); |
a099027c MK |
2209 | goto error; |
2210 | } | |
5d385153 | 2211 | p9_debug(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
a099027c MK |
2212 | error: |
2213 | p9_free_req(clnt, req); | |
2214 | return err; | |
2215 | ||
2216 | } | |
2217 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1d769cd1 MK |
2218 | |
2219 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
2220 | { | |
2221 | int err; | |
2222 | struct p9_client *clnt; | |
2223 | struct p9_req_t *req; | |
2224 | ||
2225 | err = 0; | |
2226 | clnt = fid->clnt; | |
5d385153 | 2227 | p9_debug(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
1d769cd1 MK |
2228 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
2229 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2230 | ||
2231 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
2232 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2233 | ||
2234 | if (IS_ERR(req)) | |
2235 | return PTR_ERR(req); | |
2236 | ||
2237 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
2238 | &glock->start, &glock->length, &glock->proc_id, | |
2239 | &glock->client_id); | |
2240 | if (err) { | |
348b5901 | 2241 | trace_9p_protocol_dump(clnt, req->rc); |
1d769cd1 MK |
2242 | goto error; |
2243 | } | |
5d385153 | 2244 | p9_debug(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
1d769cd1 MK |
2245 | "proc_id %d client_id %s\n", glock->type, glock->start, |
2246 | glock->length, glock->proc_id, glock->client_id); | |
2247 | error: | |
2248 | p9_free_req(clnt, req); | |
2249 | return err; | |
2250 | } | |
2251 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
329176cc MK |
2252 | |
2253 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
2254 | { | |
2255 | int err; | |
2256 | struct p9_client *clnt; | |
2257 | struct p9_req_t *req; | |
2258 | ||
2259 | err = 0; | |
2260 | clnt = fid->clnt; | |
5d385153 | 2261 | p9_debug(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
329176cc MK |
2262 | |
2263 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
2264 | if (IS_ERR(req)) | |
2265 | return PTR_ERR(req); | |
2266 | ||
2267 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
2268 | if (err) { | |
348b5901 | 2269 | trace_9p_protocol_dump(clnt, req->rc); |
329176cc MK |
2270 | goto error; |
2271 | } | |
5d385153 | 2272 | p9_debug(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
329176cc MK |
2273 | error: |
2274 | p9_free_req(clnt, req); | |
2275 | return err; | |
2276 | } | |
2277 | EXPORT_SYMBOL(p9_client_readlink); |