Commit | Line | Data |
---|---|---|
bd238fb4 LI |
1 | /* |
2 | * net/9p/clnt.c | |
3 | * | |
4 | * 9P Client | |
5 | * | |
8a0dc95f | 6 | * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
bd238fb4 LI |
7 | * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 | |
11 | * as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
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> | |
4f3b35c1 | 37 | #include <linux/uio.h> |
bd238fb4 | 38 | #include <net/9p/9p.h> |
fb0466c3 | 39 | #include <linux/parser.h> |
bd238fb4 | 40 | #include <net/9p/client.h> |
8b81ef58 | 41 | #include <net/9p/transport.h> |
51a87c55 | 42 | #include "protocol.h" |
bd238fb4 | 43 | |
348b5901 AK |
44 | #define CREATE_TRACE_POINTS |
45 | #include <trace/events/9p.h> | |
46 | ||
8a0dc95f EVH |
47 | /* |
48 | * Client Option Parsing (code inspired by NFS code) | |
49 | * - a little lazy - parse all client options | |
50 | */ | |
51 | ||
52 | enum { | |
53 | Opt_msize, | |
54 | Opt_trans, | |
55 | Opt_legacy, | |
0fb80abd | 56 | Opt_version, |
8a0dc95f EVH |
57 | Opt_err, |
58 | }; | |
59 | ||
a447c093 | 60 | static const match_table_t tokens = { |
8a0dc95f EVH |
61 | {Opt_msize, "msize=%u"}, |
62 | {Opt_legacy, "noextend"}, | |
63 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 64 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
65 | {Opt_err, NULL}, |
66 | }; | |
67 | ||
342fee1d SK |
68 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
69 | { | |
a02cec21 | 70 | return clnt->proto_version == p9_proto_2000L; |
342fee1d SK |
71 | } |
72 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
73 | ||
74 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
75 | { | |
a02cec21 | 76 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
77 | } |
78 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
79 | ||
43def35c SD |
80 | /* |
81 | * Some error codes are taken directly from the server replies, | |
82 | * make sure they are valid. | |
83 | */ | |
84 | static int safe_errno(int err) | |
85 | { | |
86 | if ((err > 0) || (err < -MAX_ERRNO)) { | |
87 | p9_debug(P9_DEBUG_ERROR, "Invalid error code %d\n", err); | |
88 | return -EPROTO; | |
89 | } | |
90 | return err; | |
91 | } | |
92 | ||
93 | ||
0fb80abd | 94 | /* Interpret mount option for protocol version */ |
4d63055f | 95 | static int get_protocol_version(char *s) |
0fb80abd | 96 | { |
3dc9fef6 DC |
97 | int version = -EINVAL; |
98 | ||
4d63055f | 99 | if (!strcmp(s, "9p2000")) { |
0fb80abd | 100 | version = p9_proto_legacy; |
5d385153 | 101 | p9_debug(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
4d63055f | 102 | } else if (!strcmp(s, "9p2000.u")) { |
0fb80abd | 103 | version = p9_proto_2000u; |
5d385153 | 104 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
4d63055f | 105 | } else if (!strcmp(s, "9p2000.L")) { |
45bc21ed | 106 | version = p9_proto_2000L; |
5d385153 | 107 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
4d63055f | 108 | } else |
5d385153 | 109 | pr_info("Unknown protocol version %s\n", s); |
4d63055f | 110 | |
0fb80abd SK |
111 | return version; |
112 | } | |
113 | ||
8a0dc95f | 114 | /** |
0e15597e AK |
115 | * parse_options - parse mount options into client structure |
116 | * @opts: options string passed from mount | |
117 | * @clnt: existing v9fs client information | |
8a0dc95f | 118 | * |
bb8ffdfc | 119 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
120 | */ |
121 | ||
bb8ffdfc | 122 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 123 | { |
d8c8a9e3 | 124 | char *options, *tmp_options; |
8a0dc95f EVH |
125 | char *p; |
126 | substring_t args[MAX_OPT_ARGS]; | |
127 | int option; | |
4d63055f | 128 | char *s; |
bb8ffdfc | 129 | int ret = 0; |
8a0dc95f | 130 | |
095e7999 | 131 | clnt->proto_version = p9_proto_2000L; |
8a0dc95f EVH |
132 | clnt->msize = 8192; |
133 | ||
bb8ffdfc EVH |
134 | if (!opts) |
135 | return 0; | |
136 | ||
d8c8a9e3 EVH |
137 | tmp_options = kstrdup(opts, GFP_KERNEL); |
138 | if (!tmp_options) { | |
5d385153 JP |
139 | p9_debug(P9_DEBUG_ERROR, |
140 | "failed to allocate copy of option string\n"); | |
bb8ffdfc EVH |
141 | return -ENOMEM; |
142 | } | |
d8c8a9e3 | 143 | options = tmp_options; |
8a0dc95f EVH |
144 | |
145 | while ((p = strsep(&options, ",")) != NULL) { | |
4d5077f1 | 146 | int token, r; |
8a0dc95f EVH |
147 | if (!*p) |
148 | continue; | |
149 | token = match_token(p, tokens, args); | |
4d5077f1 AK |
150 | switch (token) { |
151 | case Opt_msize: | |
152 | r = match_int(&args[0], &option); | |
bb8ffdfc | 153 | if (r < 0) { |
5d385153 JP |
154 | p9_debug(P9_DEBUG_ERROR, |
155 | "integer field, but no integer?\n"); | |
bb8ffdfc | 156 | ret = r; |
8a0dc95f EVH |
157 | continue; |
158 | } | |
8a0dc95f EVH |
159 | clnt->msize = option; |
160 | break; | |
161 | case Opt_trans: | |
4d63055f PK |
162 | s = match_strdup(&args[0]); |
163 | if (!s) { | |
164 | ret = -ENOMEM; | |
5d385153 JP |
165 | p9_debug(P9_DEBUG_ERROR, |
166 | "problem allocating copy of trans arg\n"); | |
4d63055f PK |
167 | goto free_and_return; |
168 | } | |
169 | clnt->trans_mod = v9fs_get_trans_by_name(s); | |
170 | if (clnt->trans_mod == NULL) { | |
5d385153 JP |
171 | pr_info("Could not find request transport: %s\n", |
172 | s); | |
349d3bb8 | 173 | ret = -EINVAL; |
4d63055f | 174 | kfree(s); |
349d3bb8 EVH |
175 | goto free_and_return; |
176 | } | |
4d63055f | 177 | kfree(s); |
8a0dc95f EVH |
178 | break; |
179 | case Opt_legacy: | |
342fee1d | 180 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 181 | break; |
0fb80abd | 182 | case Opt_version: |
4d63055f PK |
183 | s = match_strdup(&args[0]); |
184 | if (!s) { | |
185 | ret = -ENOMEM; | |
5d385153 JP |
186 | p9_debug(P9_DEBUG_ERROR, |
187 | "problem allocating copy of version arg\n"); | |
0fb80abd | 188 | goto free_and_return; |
4d63055f PK |
189 | } |
190 | ret = get_protocol_version(s); | |
191 | if (ret == -EINVAL) { | |
192 | kfree(s); | |
193 | goto free_and_return; | |
194 | } | |
195 | kfree(s); | |
0fb80abd SK |
196 | clnt->proto_version = ret; |
197 | break; | |
8a0dc95f EVH |
198 | default: |
199 | continue; | |
200 | } | |
201 | } | |
72029fe8 | 202 | |
349d3bb8 | 203 | free_and_return: |
d8c8a9e3 | 204 | kfree(tmp_options); |
bb8ffdfc | 205 | return ret; |
8a0dc95f EVH |
206 | } |
207 | ||
05a782d4 | 208 | static struct p9_fcall *p9_fcall_alloc(int alloc_msize) |
5387320d SD |
209 | { |
210 | struct p9_fcall *fc; | |
211 | fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS); | |
212 | if (!fc) | |
213 | return NULL; | |
214 | fc->capacity = alloc_msize; | |
215 | fc->sdata = (char *) fc + sizeof(struct p9_fcall); | |
216 | return fc; | |
217 | } | |
218 | ||
fea511a6 EVH |
219 | /** |
220 | * p9_tag_alloc - lookup/allocate a request by tag | |
221 | * @c: client session to lookup tag within | |
222 | * @tag: numeric id for transaction | |
223 | * | |
224 | * this is a simple array lookup, but will grow the | |
25985edc | 225 | * request_slots as necessary to accommodate transaction |
fea511a6 EVH |
226 | * ids which did not previously have a slot. |
227 | * | |
228 | * this code relies on the client spinlock to manage locks, its | |
229 | * possible we should switch to something else, but I'd rather | |
230 | * stick with something low-overhead for the common case. | |
231 | * | |
232 | */ | |
233 | ||
ef6b0807 DC |
234 | static struct p9_req_t * |
235 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) | |
fea511a6 EVH |
236 | { |
237 | unsigned long flags; | |
238 | int row, col; | |
51a87c55 | 239 | struct p9_req_t *req; |
abfa034e | 240 | int alloc_msize = min(c->msize, max_size); |
fea511a6 EVH |
241 | |
242 | /* This looks up the original request by tag so we know which | |
243 | * buffer to read the data into */ | |
244 | tag++; | |
245 | ||
246 | if (tag >= c->max_tag) { | |
247 | spin_lock_irqsave(&c->lock, flags); | |
248 | /* check again since original check was outside of lock */ | |
249 | while (tag >= c->max_tag) { | |
250 | row = (tag / P9_ROW_MAXTAG); | |
251 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
252 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
253 | ||
254 | if (!c->reqs[row]) { | |
5d385153 | 255 | pr_err("Couldn't grow tag array\n"); |
e45c5405 | 256 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 257 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
258 | } |
259 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
260 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 261 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
262 | } |
263 | c->max_tag += P9_ROW_MAXTAG; | |
264 | } | |
265 | spin_unlock_irqrestore(&c->lock, flags); | |
266 | } | |
267 | row = tag / P9_ROW_MAXTAG; | |
268 | col = tag % P9_ROW_MAXTAG; | |
269 | ||
51a87c55 | 270 | req = &c->reqs[row][col]; |
5387320d | 271 | if (!req->wq) { |
eeff66ef | 272 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
ea071aa1 SD |
273 | if (!req->wq) |
274 | goto grow_failed; | |
51a87c55 | 275 | init_waitqueue_head(req->wq); |
ea071aa1 | 276 | } |
ea071aa1 | 277 | |
5387320d SD |
278 | if (!req->tc) |
279 | req->tc = p9_fcall_alloc(alloc_msize); | |
280 | if (!req->rc) | |
281 | req->rc = p9_fcall_alloc(alloc_msize); | |
282 | if (!req->tc || !req->rc) | |
283 | goto grow_failed; | |
51a87c55 EVH |
284 | |
285 | p9pdu_reset(req->tc); | |
286 | p9pdu_reset(req->rc); | |
287 | ||
51a87c55 EVH |
288 | req->tc->tag = tag-1; |
289 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 | 290 | |
ea071aa1 SD |
291 | return req; |
292 | ||
293 | grow_failed: | |
294 | pr_err("Couldn't grow tag array\n"); | |
295 | kfree(req->tc); | |
296 | kfree(req->rc); | |
297 | kfree(req->wq); | |
298 | req->tc = req->rc = NULL; | |
299 | req->wq = NULL; | |
300 | return ERR_PTR(-ENOMEM); | |
fea511a6 | 301 | } |
fea511a6 EVH |
302 | |
303 | /** | |
304 | * p9_tag_lookup - lookup a request by tag | |
305 | * @c: client session to lookup tag within | |
306 | * @tag: numeric id for transaction | |
307 | * | |
308 | */ | |
309 | ||
310 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
311 | { | |
312 | int row, col; | |
313 | ||
314 | /* This looks up the original request by tag so we know which | |
315 | * buffer to read the data into */ | |
316 | tag++; | |
317 | ||
b85f7d92 EVH |
318 | if(tag >= c->max_tag) |
319 | return NULL; | |
fea511a6 EVH |
320 | |
321 | row = tag / P9_ROW_MAXTAG; | |
322 | col = tag % P9_ROW_MAXTAG; | |
323 | ||
324 | return &c->reqs[row][col]; | |
325 | } | |
326 | EXPORT_SYMBOL(p9_tag_lookup); | |
327 | ||
328 | /** | |
329 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 330 | * @c: v9fs client struct |
fea511a6 EVH |
331 | * |
332 | * This initializes the tags structure for each client instance. | |
333 | * | |
334 | */ | |
335 | ||
336 | static int p9_tag_init(struct p9_client *c) | |
337 | { | |
338 | int err = 0; | |
339 | ||
340 | c->tagpool = p9_idpool_create(); | |
341 | if (IS_ERR(c->tagpool)) { | |
342 | err = PTR_ERR(c->tagpool); | |
fea511a6 EVH |
343 | goto error; |
344 | } | |
fe1cbaba AK |
345 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
346 | if (err < 0) { | |
347 | p9_idpool_destroy(c->tagpool); | |
348 | goto error; | |
349 | } | |
fea511a6 EVH |
350 | c->max_tag = 0; |
351 | error: | |
352 | return err; | |
353 | } | |
354 | ||
355 | /** | |
356 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 357 | * @c: v9fs client struct |
fea511a6 EVH |
358 | * |
359 | * This frees resources associated with the tags structure | |
360 | * | |
361 | */ | |
362 | static void p9_tag_cleanup(struct p9_client *c) | |
363 | { | |
364 | int row, col; | |
365 | ||
366 | /* check to insure all requests are idle */ | |
367 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
368 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
369 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
5d385153 JP |
370 | p9_debug(P9_DEBUG_MUX, |
371 | "Attempting to cleanup non-free tag %d,%d\n", | |
372 | row, col); | |
fea511a6 EVH |
373 | /* TODO: delay execution of cleanup */ |
374 | return; | |
375 | } | |
376 | } | |
377 | } | |
378 | ||
62b2be59 LI |
379 | if (c->tagpool) { |
380 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 381 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 382 | } |
fea511a6 EVH |
383 | |
384 | /* free requests associated with tags */ | |
385 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 386 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 387 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
388 | kfree(c->reqs[row][col].tc); |
389 | kfree(c->reqs[row][col].rc); | |
390 | } | |
fea511a6 EVH |
391 | kfree(c->reqs[row]); |
392 | } | |
393 | c->max_tag = 0; | |
394 | } | |
395 | ||
673d62cd EVH |
396 | /** |
397 | * p9_free_req - free a request and clean-up as necessary | |
398 | * c: client state | |
399 | * r: request to release | |
400 | * | |
401 | */ | |
402 | ||
51a87c55 | 403 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 404 | { |
51a87c55 | 405 | int tag = r->tc->tag; |
5d385153 | 406 | p9_debug(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
51a87c55 | 407 | |
673d62cd | 408 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
409 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
410 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
411 | } |
412 | ||
91b8534f EVH |
413 | /** |
414 | * p9_client_cb - call back from transport to client | |
415 | * c: client state | |
416 | * req: request received | |
417 | * | |
418 | */ | |
2b6e72ed | 419 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status) |
91b8534f | 420 | { |
5d385153 | 421 | p9_debug(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
2b6e72ed DM |
422 | |
423 | /* | |
424 | * This barrier is needed to make sure any change made to req before | |
425 | * the other thread wakes up will indeed be seen by the waiting side. | |
426 | */ | |
427 | smp_wmb(); | |
428 | req->status = status; | |
429 | ||
1bab88b2 | 430 | wake_up(req->wq); |
5d385153 | 431 | p9_debug(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
91b8534f EVH |
432 | } |
433 | EXPORT_SYMBOL(p9_client_cb); | |
434 | ||
51a87c55 EVH |
435 | /** |
436 | * p9_parse_header - parse header arguments out of a packet | |
437 | * @pdu: packet to parse | |
438 | * @size: size of packet | |
439 | * @type: type of request | |
440 | * @tag: tag of packet | |
441 | * @rewind: set if we need to rewind offset afterwards | |
442 | */ | |
443 | ||
444 | int | |
445 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
446 | int rewind) | |
447 | { | |
448 | int8_t r_type; | |
449 | int16_t r_tag; | |
450 | int32_t r_size; | |
451 | int offset = pdu->offset; | |
452 | int err; | |
453 | ||
454 | pdu->offset = 0; | |
455 | if (pdu->size == 0) | |
456 | pdu->size = 7; | |
457 | ||
458 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
459 | if (err) | |
460 | goto rewind_and_exit; | |
461 | ||
462 | pdu->size = r_size; | |
463 | pdu->id = r_type; | |
464 | pdu->tag = r_tag; | |
465 | ||
5d385153 JP |
466 | p9_debug(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", |
467 | pdu->size, pdu->id, pdu->tag); | |
51a87c55 EVH |
468 | |
469 | if (type) | |
470 | *type = r_type; | |
471 | if (tag) | |
472 | *tag = r_tag; | |
473 | if (size) | |
474 | *size = r_size; | |
475 | ||
476 | ||
477 | rewind_and_exit: | |
478 | if (rewind) | |
479 | pdu->offset = offset; | |
480 | return err; | |
481 | } | |
482 | EXPORT_SYMBOL(p9_parse_header); | |
483 | ||
484 | /** | |
485 | * p9_check_errors - check 9p packet for error return and process it | |
486 | * @c: current client instance | |
487 | * @req: request to parse and check for error conditions | |
488 | * | |
489 | * returns error code if one is discovered, otherwise returns 0 | |
490 | * | |
491 | * this will have to be more complicated if we have multiple | |
492 | * error packet types | |
493 | */ | |
494 | ||
495 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
496 | { | |
497 | int8_t type; | |
498 | int err; | |
ca41bb3e | 499 | int ecode; |
51a87c55 EVH |
500 | |
501 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
502 | /* |
503 | * dump the response from server | |
504 | * This should be after check errors which poplulate pdu_fcall. | |
505 | */ | |
506 | trace_9p_protocol_dump(c, req->rc); | |
51a87c55 | 507 | if (err) { |
5d385153 | 508 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
51a87c55 EVH |
509 | return err; |
510 | } | |
ca41bb3e VJJ |
511 | if (type != P9_RERROR && type != P9_RLERROR) |
512 | return 0; | |
4f7ebe80 | 513 | |
ca41bb3e VJJ |
514 | if (!p9_is_proto_dotl(c)) { |
515 | char *ename; | |
ca41bb3e | 516 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e | 517 | &ename, &ecode); |
ca41bb3e VJJ |
518 | if (err) |
519 | goto out_err; | |
4f7ebe80 | 520 | |
ca41bb3e VJJ |
521 | if (p9_is_proto_dotu(c)) |
522 | err = -ecode; | |
4f7ebe80 | 523 | |
ca41bb3e VJJ |
524 | if (!err || !IS_ERR_VALUE(err)) { |
525 | err = p9_errstr2errno(ename, strlen(ename)); | |
4f7ebe80 | 526 | |
5d385153 JP |
527 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
528 | -ecode, ename); | |
4f7ebe80 | 529 | } |
abfa034e | 530 | kfree(ename); |
ca41bb3e VJJ |
531 | } else { |
532 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
533 | err = -ecode; | |
534 | ||
5d385153 | 535 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
ca41bb3e | 536 | } |
51a87c55 | 537 | |
51a87c55 | 538 | return err; |
4f7ebe80 AB |
539 | |
540 | out_err: | |
5d385153 | 541 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
4f7ebe80 AB |
542 | |
543 | return err; | |
51a87c55 EVH |
544 | } |
545 | ||
abfa034e AK |
546 | /** |
547 | * p9_check_zc_errors - check 9p packet for error return and process it | |
548 | * @c: current client instance | |
549 | * @req: request to parse and check for error conditions | |
550 | * @in_hdrlen: Size of response protocol buffer. | |
551 | * | |
552 | * returns error code if one is discovered, otherwise returns 0 | |
553 | * | |
554 | * this will have to be more complicated if we have multiple | |
555 | * error packet types | |
556 | */ | |
557 | ||
558 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, | |
4f3b35c1 | 559 | struct iov_iter *uidata, int in_hdrlen) |
abfa034e AK |
560 | { |
561 | int err; | |
562 | int ecode; | |
563 | int8_t type; | |
564 | char *ename = NULL; | |
565 | ||
566 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
567 | /* |
568 | * dump the response from server | |
569 | * This should be after parse_header which poplulate pdu_fcall. | |
570 | */ | |
571 | trace_9p_protocol_dump(c, req->rc); | |
abfa034e | 572 | if (err) { |
5d385153 | 573 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
abfa034e AK |
574 | return err; |
575 | } | |
576 | ||
577 | if (type != P9_RERROR && type != P9_RLERROR) | |
578 | return 0; | |
579 | ||
580 | if (!p9_is_proto_dotl(c)) { | |
581 | /* Error is reported in string format */ | |
42fe6484 AK |
582 | int len; |
583 | /* 7 = header size for RERROR; */ | |
584 | int inline_len = in_hdrlen - 7; | |
abfa034e | 585 | |
42fe6484 AK |
586 | len = req->rc->size - req->rc->offset; |
587 | if (len > (P9_ZC_HDR_SZ - 7)) { | |
588 | err = -EFAULT; | |
abfa034e AK |
589 | goto out_err; |
590 | } | |
abfa034e | 591 | |
42fe6484 AK |
592 | ename = &req->rc->sdata[req->rc->offset]; |
593 | if (len > inline_len) { | |
594 | /* We have error in external buffer */ | |
4f3b35c1 AV |
595 | err = copy_from_iter(ename + inline_len, |
596 | len - inline_len, uidata); | |
597 | if (err != len - inline_len) { | |
598 | err = -EFAULT; | |
599 | goto out_err; | |
abfa034e AK |
600 | } |
601 | } | |
42fe6484 AK |
602 | ename = NULL; |
603 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", | |
604 | &ename, &ecode); | |
605 | if (err) | |
606 | goto out_err; | |
607 | ||
608 | if (p9_is_proto_dotu(c)) | |
abfa034e | 609 | err = -ecode; |
42fe6484 | 610 | |
abfa034e AK |
611 | if (!err || !IS_ERR_VALUE(err)) { |
612 | err = p9_errstr2errno(ename, strlen(ename)); | |
613 | ||
5d385153 JP |
614 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
615 | -ecode, ename); | |
abfa034e AK |
616 | } |
617 | kfree(ename); | |
618 | } else { | |
619 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
620 | err = -ecode; | |
621 | ||
5d385153 | 622 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
abfa034e AK |
623 | } |
624 | return err; | |
625 | ||
abfa034e | 626 | out_err: |
5d385153 | 627 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
abfa034e AK |
628 | return err; |
629 | } | |
630 | ||
aca00763 RL |
631 | static struct p9_req_t * |
632 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
633 | ||
51a87c55 EVH |
634 | /** |
635 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
636 | * @c: client state |
637 | * @oldreq: request to cancel | |
51a87c55 | 638 | * |
aca00763 | 639 | * This sents a flush for a particular request and links |
51a87c55 EVH |
640 | * the flush request to the original request. The current |
641 | * code only supports a single flush request although the protocol | |
642 | * allows for multiple flush requests to be sent for a single request. | |
643 | * | |
644 | */ | |
645 | ||
646 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
647 | { | |
648 | struct p9_req_t *req; | |
649 | int16_t oldtag; | |
650 | int err; | |
651 | ||
652 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
653 | if (err) | |
654 | return err; | |
655 | ||
5d385153 | 656 | p9_debug(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
51a87c55 EVH |
657 | |
658 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
659 | if (IS_ERR(req)) | |
660 | return PTR_ERR(req); | |
661 | ||
1cff3306 SD |
662 | /* |
663 | * if we haven't received a response for oldreq, | |
60ff779c | 664 | * remove it from the list |
1cff3306 | 665 | */ |
0bfd6845 | 666 | if (oldreq->status == REQ_STATUS_SENT) |
afd8d654 SD |
667 | if (c->trans_mod->cancelled) |
668 | c->trans_mod->cancelled(c, oldreq); | |
1bab88b2 LI |
669 | |
670 | p9_free_req(c, req); | |
51a87c55 EVH |
671 | return 0; |
672 | } | |
673 | ||
abfa034e AK |
674 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
675 | int8_t type, int req_size, | |
676 | const char *fmt, va_list ap) | |
91b8534f | 677 | { |
51a87c55 | 678 | int tag, err; |
91b8534f | 679 | struct p9_req_t *req; |
91b8534f | 680 | |
5d385153 | 681 | p9_debug(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 682 | |
6d96d3ab AK |
683 | /* we allow for any status other than disconnected */ |
684 | if (c->status == Disconnected) | |
685 | return ERR_PTR(-EIO); | |
686 | ||
687 | /* if status is begin_disconnected we allow only clunk request */ | |
688 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 689 | return ERR_PTR(-EIO); |
91b8534f | 690 | |
91b8534f | 691 | tag = P9_NOTAG; |
51a87c55 | 692 | if (type != P9_TVERSION) { |
91b8534f EVH |
693 | tag = p9_idpool_get(c->tagpool); |
694 | if (tag < 0) | |
51a87c55 | 695 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
696 | } |
697 | ||
abfa034e | 698 | req = p9_tag_alloc(c, tag, req_size); |
51a87c55 EVH |
699 | if (IS_ERR(req)) |
700 | return req; | |
91b8534f | 701 | |
51a87c55 EVH |
702 | /* marshall the data */ |
703 | p9pdu_prepare(req->tc, tag, type); | |
342fee1d | 704 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe AK |
705 | if (err) |
706 | goto reterr; | |
348b5901 AK |
707 | p9pdu_finalize(c, req->tc); |
708 | trace_9p_client_req(c, type, tag); | |
abfa034e AK |
709 | return req; |
710 | reterr: | |
711 | p9_free_req(c, req); | |
712 | return ERR_PTR(err); | |
713 | } | |
714 | ||
715 | /** | |
716 | * p9_client_rpc - issue a request and wait for a response | |
717 | * @c: client session | |
718 | * @type: type of request | |
719 | * @fmt: protocol format string (see protocol.c) | |
720 | * | |
721 | * Returns request structure (which client must free using p9_free_req) | |
722 | */ | |
723 | ||
724 | static struct p9_req_t * | |
725 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
726 | { | |
727 | va_list ap; | |
728 | int sigpending, err; | |
729 | unsigned long flags; | |
730 | struct p9_req_t *req; | |
731 | ||
732 | va_start(ap, fmt); | |
733 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); | |
734 | va_end(ap); | |
735 | if (IS_ERR(req)) | |
736 | return req; | |
737 | ||
738 | if (signal_pending(current)) { | |
739 | sigpending = 1; | |
740 | clear_thread_flag(TIF_SIGPENDING); | |
741 | } else | |
742 | sigpending = 0; | |
91b8534f EVH |
743 | |
744 | err = c->trans_mod->request(c, req); | |
745 | if (err < 0) { | |
3cd79678 | 746 | if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d | 747 | c->status = Disconnected; |
91b8534f EVH |
748 | goto reterr; |
749 | } | |
a314f274 | 750 | again: |
abfa034e | 751 | /* Wait for the response */ |
91b8534f | 752 | err = wait_event_interruptible(*req->wq, |
abfa034e | 753 | req->status >= REQ_STATUS_RCVD); |
91b8534f | 754 | |
2b6e72ed DM |
755 | /* |
756 | * Make sure our req is coherent with regard to updates in other | |
757 | * threads - echoes to wmb() in the callback | |
758 | */ | |
759 | smp_rmb(); | |
760 | ||
a314f274 JG |
761 | if ((err == -ERESTARTSYS) && (c->status == Connected) |
762 | && (type == P9_TFLUSH)) { | |
763 | sigpending = 1; | |
764 | clear_thread_flag(TIF_SIGPENDING); | |
765 | goto again; | |
766 | } | |
767 | ||
91b8534f | 768 | if (req->status == REQ_STATUS_ERROR) { |
5d385153 | 769 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 770 | err = req->t_err; |
91b8534f | 771 | } |
1bab88b2 | 772 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
5d385153 | 773 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 774 | sigpending = 1; |
91b8534f EVH |
775 | clear_thread_flag(TIF_SIGPENDING); |
776 | ||
1bab88b2 LI |
777 | if (c->trans_mod->cancel(c, req)) |
778 | p9_client_flush(c, req); | |
779 | ||
780 | /* if we received the response anyway, don't signal error */ | |
781 | if (req->status == REQ_STATUS_RCVD) | |
782 | err = 0; | |
91b8534f | 783 | } |
91b8534f EVH |
784 | if (sigpending) { |
785 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
786 | recalc_sigpending(); | |
787 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
788 | } | |
91b8534f EVH |
789 | if (err < 0) |
790 | goto reterr; | |
791 | ||
51a87c55 | 792 | err = p9_check_errors(c, req); |
348b5901 AK |
793 | trace_9p_client_res(c, type, req->rc->tag, err); |
794 | if (!err) | |
51a87c55 | 795 | return req; |
abfa034e | 796 | reterr: |
abfa034e | 797 | p9_free_req(c, req); |
43def35c | 798 | return ERR_PTR(safe_errno(err)); |
abfa034e AK |
799 | } |
800 | ||
801 | /** | |
802 | * p9_client_zc_rpc - issue a request and wait for a response | |
803 | * @c: client session | |
804 | * @type: type of request | |
4f3b35c1 AV |
805 | * @uidata: destination for zero copy read |
806 | * @uodata: source for zero copy write | |
abfa034e AK |
807 | * @inlen: read buffer size |
808 | * @olen: write buffer size | |
809 | * @hdrlen: reader header size, This is the size of response protocol data | |
810 | * @fmt: protocol format string (see protocol.c) | |
811 | * | |
812 | * Returns request structure (which client must free using p9_free_req) | |
813 | */ | |
814 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, | |
4f3b35c1 AV |
815 | struct iov_iter *uidata, |
816 | struct iov_iter *uodata, | |
abfa034e | 817 | int inlen, int olen, int in_hdrlen, |
4f3b35c1 | 818 | const char *fmt, ...) |
abfa034e AK |
819 | { |
820 | va_list ap; | |
821 | int sigpending, err; | |
822 | unsigned long flags; | |
823 | struct p9_req_t *req; | |
824 | ||
825 | va_start(ap, fmt); | |
826 | /* | |
827 | * We allocate a inline protocol data of only 4k bytes. | |
828 | * The actual content is passed in zero-copy fashion. | |
829 | */ | |
830 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); | |
831 | va_end(ap); | |
832 | if (IS_ERR(req)) | |
833 | return req; | |
834 | ||
835 | if (signal_pending(current)) { | |
836 | sigpending = 1; | |
837 | clear_thread_flag(TIF_SIGPENDING); | |
838 | } else | |
839 | sigpending = 0; | |
840 | ||
abfa034e | 841 | err = c->trans_mod->zc_request(c, req, uidata, uodata, |
4f3b35c1 | 842 | inlen, olen, in_hdrlen); |
abfa034e AK |
843 | if (err < 0) { |
844 | if (err == -EIO) | |
845 | c->status = Disconnected; | |
846 | goto reterr; | |
847 | } | |
848 | if (req->status == REQ_STATUS_ERROR) { | |
5d385153 | 849 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
abfa034e AK |
850 | err = req->t_err; |
851 | } | |
852 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
5d385153 | 853 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
abfa034e AK |
854 | sigpending = 1; |
855 | clear_thread_flag(TIF_SIGPENDING); | |
91b8534f | 856 | |
abfa034e AK |
857 | if (c->trans_mod->cancel(c, req)) |
858 | p9_client_flush(c, req); | |
859 | ||
860 | /* if we received the response anyway, don't signal error */ | |
861 | if (req->status == REQ_STATUS_RCVD) | |
862 | err = 0; | |
863 | } | |
864 | if (sigpending) { | |
865 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
866 | recalc_sigpending(); | |
867 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
868 | } | |
869 | if (err < 0) | |
870 | goto reterr; | |
871 | ||
4f3b35c1 | 872 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen); |
348b5901 AK |
873 | trace_9p_client_res(c, type, req->rc->tag, err); |
874 | if (!err) | |
abfa034e | 875 | return req; |
91b8534f EVH |
876 | reterr: |
877 | p9_free_req(c, req); | |
43def35c | 878 | return ERR_PTR(safe_errno(err)); |
91b8534f EVH |
879 | } |
880 | ||
5503ac56 EVH |
881 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
882 | { | |
9f3e9bbe | 883 | int ret; |
5503ac56 | 884 | struct p9_fid *fid; |
cac23d65 | 885 | unsigned long flags; |
5503ac56 | 886 | |
5d385153 | 887 | p9_debug(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
888 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
889 | if (!fid) | |
890 | return ERR_PTR(-ENOMEM); | |
891 | ||
9f3e9bbe | 892 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 893 | if (ret < 0) { |
9f3e9bbe | 894 | ret = -ENOSPC; |
5503ac56 EVH |
895 | goto error; |
896 | } | |
9f3e9bbe | 897 | fid->fid = ret; |
5503ac56 EVH |
898 | |
899 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
900 | fid->mode = -1; | |
f8b9d53a | 901 | fid->uid = current_fsuid(); |
5503ac56 | 902 | fid->clnt = clnt; |
3e2796a9 | 903 | fid->rdir = NULL; |
cac23d65 | 904 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 905 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 906 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
907 | |
908 | return fid; | |
909 | ||
910 | error: | |
911 | kfree(fid); | |
9f3e9bbe | 912 | return ERR_PTR(ret); |
5503ac56 EVH |
913 | } |
914 | ||
915 | static void p9_fid_destroy(struct p9_fid *fid) | |
916 | { | |
917 | struct p9_client *clnt; | |
cac23d65 | 918 | unsigned long flags; |
5503ac56 | 919 | |
5d385153 | 920 | p9_debug(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
921 | clnt = fid->clnt; |
922 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 923 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 924 | list_del(&fid->flist); |
cac23d65 | 925 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 926 | kfree(fid->rdir); |
5503ac56 EVH |
927 | kfree(fid); |
928 | } | |
8a0dc95f | 929 | |
32a875ad | 930 | static int p9_client_version(struct p9_client *c) |
bd238fb4 | 931 | { |
6936bf60 | 932 | int err = 0; |
51a87c55 EVH |
933 | struct p9_req_t *req; |
934 | char *version; | |
935 | int msize; | |
bd238fb4 | 936 | |
5d385153 JP |
937 | p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
938 | c->msize, c->proto_version); | |
c5a7697d SK |
939 | |
940 | switch (c->proto_version) { | |
45bc21ed | 941 | case p9_proto_2000L: |
c5a7697d | 942 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 943 | c->msize, "9P2000.L"); |
c5a7697d SK |
944 | break; |
945 | case p9_proto_2000u: | |
946 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
947 | c->msize, "9P2000.u"); | |
948 | break; | |
949 | case p9_proto_legacy: | |
950 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
951 | c->msize, "9P2000"); | |
952 | break; | |
953 | default: | |
954 | return -EINVAL; | |
c5a7697d SK |
955 | } |
956 | ||
51a87c55 EVH |
957 | if (IS_ERR(req)) |
958 | return PTR_ERR(req); | |
6936bf60 | 959 | |
342fee1d | 960 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 | 961 | if (err) { |
5d385153 | 962 | p9_debug(P9_DEBUG_9P, "version error %d\n", err); |
348b5901 | 963 | trace_9p_protocol_dump(c, req->rc); |
6936bf60 | 964 | goto error; |
51a87c55 | 965 | } |
6936bf60 | 966 | |
5d385153 | 967 | p9_debug(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
968 | if (!strncmp(version, "9P2000.L", 8)) |
969 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 970 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
971 | c->proto_version = p9_proto_2000u; |
972 | else if (!strncmp(version, "9P2000", 6)) | |
973 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
974 | else { |
975 | err = -EREMOTEIO; | |
976 | goto error; | |
977 | } | |
978 | ||
51a87c55 EVH |
979 | if (msize < c->msize) |
980 | c->msize = msize; | |
6936bf60 EVH |
981 | |
982 | error: | |
51a87c55 EVH |
983 | kfree(version); |
984 | p9_free_req(c, req); | |
6936bf60 EVH |
985 | |
986 | return err; | |
987 | } | |
6936bf60 EVH |
988 | |
989 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
990 | { | |
991 | int err; | |
992 | struct p9_client *clnt; | |
50192abe | 993 | char *client_id; |
6936bf60 EVH |
994 | |
995 | err = 0; | |
bd238fb4 LI |
996 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
997 | if (!clnt) | |
998 | return ERR_PTR(-ENOMEM); | |
999 | ||
72029fe8 | 1000 | clnt->trans_mod = NULL; |
bb8ffdfc | 1001 | clnt->trans = NULL; |
50192abe WD |
1002 | |
1003 | client_id = utsname()->nodename; | |
1004 | memcpy(clnt->name, client_id, strlen(client_id) + 1); | |
1005 | ||
bd238fb4 | 1006 | spin_lock_init(&clnt->lock); |
bd238fb4 | 1007 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 1008 | |
fe1cbaba AK |
1009 | err = p9_tag_init(clnt); |
1010 | if (err < 0) | |
1011 | goto free_client; | |
fea511a6 | 1012 | |
bb8ffdfc EVH |
1013 | err = parse_opts(options, clnt); |
1014 | if (err < 0) | |
fe1cbaba | 1015 | goto destroy_tagpool; |
bb8ffdfc | 1016 | |
a17d1720 AK |
1017 | if (!clnt->trans_mod) |
1018 | clnt->trans_mod = v9fs_get_default_trans(); | |
1019 | ||
8a0dc95f EVH |
1020 | if (clnt->trans_mod == NULL) { |
1021 | err = -EPROTONOSUPPORT; | |
5d385153 JP |
1022 | p9_debug(P9_DEBUG_ERROR, |
1023 | "No transport defined or default transport\n"); | |
fe1cbaba | 1024 | goto destroy_tagpool; |
8781ff94 EVH |
1025 | } |
1026 | ||
1027 | clnt->fidpool = p9_idpool_create(); | |
1028 | if (IS_ERR(clnt->fidpool)) { | |
1029 | err = PTR_ERR(clnt->fidpool); | |
8781ff94 | 1030 | goto put_trans; |
8a0dc95f EVH |
1031 | } |
1032 | ||
5d385153 JP |
1033 | p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
1034 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 1035 | |
8b81ef58 EVH |
1036 | err = clnt->trans_mod->create(clnt, dev_name, options); |
1037 | if (err) | |
8781ff94 | 1038 | goto destroy_fidpool; |
bd238fb4 | 1039 | |
c9ffb05c VJJ |
1040 | if (clnt->msize > clnt->trans_mod->maxsize) |
1041 | clnt->msize = clnt->trans_mod->maxsize; | |
8a0dc95f | 1042 | |
6936bf60 | 1043 | err = p9_client_version(clnt); |
bd238fb4 | 1044 | if (err) |
8781ff94 | 1045 | goto close_trans; |
bd238fb4 | 1046 | |
bd238fb4 LI |
1047 | return clnt; |
1048 | ||
8781ff94 EVH |
1049 | close_trans: |
1050 | clnt->trans_mod->close(clnt); | |
1051 | destroy_fidpool: | |
1052 | p9_idpool_destroy(clnt->fidpool); | |
1053 | put_trans: | |
1054 | v9fs_put_trans(clnt->trans_mod); | |
fe1cbaba AK |
1055 | destroy_tagpool: |
1056 | p9_idpool_destroy(clnt->tagpool); | |
8781ff94 EVH |
1057 | free_client: |
1058 | kfree(clnt); | |
bd238fb4 LI |
1059 | return ERR_PTR(err); |
1060 | } | |
1061 | EXPORT_SYMBOL(p9_client_create); | |
1062 | ||
1063 | void p9_client_destroy(struct p9_client *clnt) | |
1064 | { | |
1065 | struct p9_fid *fid, *fidptr; | |
1066 | ||
5d385153 | 1067 | p9_debug(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 1068 | |
8b81ef58 EVH |
1069 | if (clnt->trans_mod) |
1070 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 1071 | |
72029fe8 TH |
1072 | v9fs_put_trans(clnt->trans_mod); |
1073 | ||
6d96d3ab | 1074 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
5d385153 | 1075 | pr_info("Found fid %d not clunked\n", fid->fid); |
bd238fb4 | 1076 | p9_fid_destroy(fid); |
6d96d3ab | 1077 | } |
bd238fb4 | 1078 | |
0af8887e EVH |
1079 | if (clnt->fidpool) |
1080 | p9_idpool_destroy(clnt->fidpool); | |
1081 | ||
fea511a6 EVH |
1082 | p9_tag_cleanup(clnt); |
1083 | ||
bd238fb4 LI |
1084 | kfree(clnt); |
1085 | } | |
1086 | EXPORT_SYMBOL(p9_client_destroy); | |
1087 | ||
1088 | void p9_client_disconnect(struct p9_client *clnt) | |
1089 | { | |
5d385153 | 1090 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
8b81ef58 | 1091 | clnt->status = Disconnected; |
bd238fb4 LI |
1092 | } |
1093 | EXPORT_SYMBOL(p9_client_disconnect); | |
1094 | ||
6d96d3ab AK |
1095 | void p9_client_begin_disconnect(struct p9_client *clnt) |
1096 | { | |
5d385153 | 1097 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
6d96d3ab AK |
1098 | clnt->status = BeginDisconnect; |
1099 | } | |
1100 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
1101 | ||
bd238fb4 | 1102 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
f791f7c5 | 1103 | char *uname, kuid_t n_uname, char *aname) |
bd238fb4 | 1104 | { |
348b5901 | 1105 | int err = 0; |
51a87c55 | 1106 | struct p9_req_t *req; |
bd238fb4 | 1107 | struct p9_fid *fid; |
51a87c55 | 1108 | struct p9_qid qid; |
bd238fb4 | 1109 | |
bd238fb4 | 1110 | |
5d385153 JP |
1111 | p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
1112 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 LI |
1113 | fid = p9_fid_create(clnt); |
1114 | if (IS_ERR(fid)) { | |
1115 | err = PTR_ERR(fid); | |
1116 | fid = NULL; | |
1117 | goto error; | |
1118 | } | |
21c9f5cc | 1119 | fid->uid = n_uname; |
bd238fb4 | 1120 | |
f791f7c5 | 1121 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, |
51a87c55 EVH |
1122 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
1123 | if (IS_ERR(req)) { | |
1124 | err = PTR_ERR(req); | |
bd238fb4 LI |
1125 | goto error; |
1126 | } | |
1127 | ||
342fee1d | 1128 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 1129 | if (err) { |
348b5901 | 1130 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1131 | p9_free_req(clnt, req); |
bd238fb4 | 1132 | goto error; |
51a87c55 | 1133 | } |
bd238fb4 | 1134 | |
5d385153 JP |
1135 | p9_debug(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
1136 | qid.type, (unsigned long long)qid.path, qid.version); | |
51a87c55 EVH |
1137 | |
1138 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
1139 | ||
1140 | p9_free_req(clnt, req); | |
bd238fb4 LI |
1141 | return fid; |
1142 | ||
1143 | error: | |
bd238fb4 LI |
1144 | if (fid) |
1145 | p9_fid_destroy(fid); | |
1146 | return ERR_PTR(err); | |
1147 | } | |
1148 | EXPORT_SYMBOL(p9_client_attach); | |
1149 | ||
b76225e2 HPB |
1150 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
1151 | char **wnames, int clone) | |
bd238fb4 LI |
1152 | { |
1153 | int err; | |
bd238fb4 LI |
1154 | struct p9_client *clnt; |
1155 | struct p9_fid *fid; | |
51a87c55 EVH |
1156 | struct p9_qid *wqids; |
1157 | struct p9_req_t *req; | |
b76225e2 | 1158 | uint16_t nwqids, count; |
bd238fb4 | 1159 | |
bd238fb4 | 1160 | err = 0; |
62b2be59 | 1161 | wqids = NULL; |
bd238fb4 LI |
1162 | clnt = oldfid->clnt; |
1163 | if (clone) { | |
1164 | fid = p9_fid_create(clnt); | |
1165 | if (IS_ERR(fid)) { | |
1166 | err = PTR_ERR(fid); | |
1167 | fid = NULL; | |
1168 | goto error; | |
1169 | } | |
1170 | ||
1171 | fid->uid = oldfid->uid; | |
1172 | } else | |
1173 | fid = oldfid; | |
1174 | ||
51a87c55 | 1175 | |
5d385153 JP |
1176 | p9_debug(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
1177 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
51a87c55 EVH |
1178 | |
1179 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
1180 | nwname, wnames); | |
1181 | if (IS_ERR(req)) { | |
1182 | err = PTR_ERR(req); | |
bd238fb4 LI |
1183 | goto error; |
1184 | } | |
1185 | ||
342fee1d | 1186 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 | 1187 | if (err) { |
348b5901 | 1188 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 | 1189 | p9_free_req(clnt, req); |
51a87c55 | 1190 | goto clunk_fid; |
e7f4b8f1 EVH |
1191 | } |
1192 | p9_free_req(clnt, req); | |
bd238fb4 | 1193 | |
5d385153 | 1194 | p9_debug(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
51a87c55 EVH |
1195 | |
1196 | if (nwqids != nwname) { | |
bd238fb4 LI |
1197 | err = -ENOENT; |
1198 | goto clunk_fid; | |
1199 | } | |
1200 | ||
51a87c55 | 1201 | for (count = 0; count < nwqids; count++) |
5d385153 | 1202 | p9_debug(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
b0d5fdef RD |
1203 | count, wqids[count].type, |
1204 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
1205 | wqids[count].version); |
1206 | ||
bd238fb4 | 1207 | if (nwname) |
51a87c55 | 1208 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
1209 | else |
1210 | fid->qid = oldfid->qid; | |
1211 | ||
62b2be59 | 1212 | kfree(wqids); |
bd238fb4 LI |
1213 | return fid; |
1214 | ||
1215 | clunk_fid: | |
62b2be59 | 1216 | kfree(wqids); |
51a87c55 EVH |
1217 | p9_client_clunk(fid); |
1218 | fid = NULL; | |
bd238fb4 LI |
1219 | |
1220 | error: | |
bd238fb4 LI |
1221 | if (fid && (fid != oldfid)) |
1222 | p9_fid_destroy(fid); | |
1223 | ||
1224 | return ERR_PTR(err); | |
1225 | } | |
1226 | EXPORT_SYMBOL(p9_client_walk); | |
1227 | ||
1228 | int p9_client_open(struct p9_fid *fid, int mode) | |
1229 | { | |
1230 | int err; | |
bd238fb4 | 1231 | struct p9_client *clnt; |
51a87c55 EVH |
1232 | struct p9_req_t *req; |
1233 | struct p9_qid qid; | |
1234 | int iounit; | |
bd238fb4 | 1235 | |
bd238fb4 | 1236 | clnt = fid->clnt; |
5d385153 | 1237 | p9_debug(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
ef56547e MK |
1238 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
1239 | err = 0; | |
bd238fb4 LI |
1240 | |
1241 | if (fid->mode != -1) | |
1242 | return -EINVAL; | |
1243 | ||
ef56547e MK |
1244 | if (p9_is_proto_dotl(clnt)) |
1245 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1246 | else | |
1247 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1248 | if (IS_ERR(req)) { |
1249 | err = PTR_ERR(req); | |
1250 | goto error; | |
bd238fb4 LI |
1251 | } |
1252 | ||
342fee1d | 1253 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1254 | if (err) { |
348b5901 | 1255 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1256 | goto free_and_error; |
1257 | } | |
51a87c55 | 1258 | |
5d385153 | 1259 | p9_debug(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
ef56547e MK |
1260 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
1261 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1262 | |
1263 | fid->mode = mode; | |
51a87c55 | 1264 | fid->iounit = iounit; |
bd238fb4 | 1265 | |
e7f4b8f1 EVH |
1266 | free_and_error: |
1267 | p9_free_req(clnt, req); | |
51a87c55 | 1268 | error: |
bd238fb4 LI |
1269 | return err; |
1270 | } | |
1271 | EXPORT_SYMBOL(p9_client_open); | |
1272 | ||
5643135a | 1273 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
f791f7c5 | 1274 | kgid_t gid, struct p9_qid *qid) |
5643135a VJJ |
1275 | { |
1276 | int err = 0; | |
1277 | struct p9_client *clnt; | |
1278 | struct p9_req_t *req; | |
1279 | int iounit; | |
1280 | ||
5d385153 | 1281 | p9_debug(P9_DEBUG_9P, |
5643135a | 1282 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
f791f7c5 EB |
1283 | ofid->fid, name, flags, mode, |
1284 | from_kgid(&init_user_ns, gid)); | |
5643135a VJJ |
1285 | clnt = ofid->clnt; |
1286 | ||
1287 | if (ofid->mode != -1) | |
1288 | return -EINVAL; | |
1289 | ||
f791f7c5 | 1290 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, |
5643135a VJJ |
1291 | mode, gid); |
1292 | if (IS_ERR(req)) { | |
1293 | err = PTR_ERR(req); | |
1294 | goto error; | |
1295 | } | |
1296 | ||
1297 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1298 | if (err) { | |
348b5901 | 1299 | trace_9p_protocol_dump(clnt, req->rc); |
5643135a VJJ |
1300 | goto free_and_error; |
1301 | } | |
1302 | ||
5d385153 | 1303 | p9_debug(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
5643135a VJJ |
1304 | qid->type, |
1305 | (unsigned long long)qid->path, | |
1306 | qid->version, iounit); | |
1307 | ||
1308 | ofid->mode = mode; | |
1309 | ofid->iounit = iounit; | |
1310 | ||
1311 | free_and_error: | |
1312 | p9_free_req(clnt, req); | |
1313 | error: | |
1314 | return err; | |
1315 | } | |
1316 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1317 | ||
bd238fb4 LI |
1318 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1319 | char *extension) | |
1320 | { | |
1321 | int err; | |
bd238fb4 | 1322 | struct p9_client *clnt; |
51a87c55 EVH |
1323 | struct p9_req_t *req; |
1324 | struct p9_qid qid; | |
1325 | int iounit; | |
bd238fb4 | 1326 | |
5d385153 | 1327 | p9_debug(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
51a87c55 | 1328 | fid->fid, name, perm, mode); |
bd238fb4 | 1329 | err = 0; |
bd238fb4 LI |
1330 | clnt = fid->clnt; |
1331 | ||
1332 | if (fid->mode != -1) | |
1333 | return -EINVAL; | |
1334 | ||
51a87c55 EVH |
1335 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1336 | mode, extension); | |
1337 | if (IS_ERR(req)) { | |
1338 | err = PTR_ERR(req); | |
1339 | goto error; | |
bd238fb4 LI |
1340 | } |
1341 | ||
342fee1d | 1342 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1343 | if (err) { |
348b5901 | 1344 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1345 | goto free_and_error; |
1346 | } | |
51a87c55 | 1347 | |
5d385153 | 1348 | p9_debug(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
b0d5fdef RD |
1349 | qid.type, |
1350 | (unsigned long long)qid.path, | |
1351 | qid.version, iounit); | |
bd238fb4 LI |
1352 | |
1353 | fid->mode = mode; | |
51a87c55 | 1354 | fid->iounit = iounit; |
bd238fb4 | 1355 | |
e7f4b8f1 EVH |
1356 | free_and_error: |
1357 | p9_free_req(clnt, req); | |
51a87c55 | 1358 | error: |
bd238fb4 LI |
1359 | return err; |
1360 | } | |
1361 | EXPORT_SYMBOL(p9_client_fcreate); | |
1362 | ||
f791f7c5 | 1363 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, kgid_t gid, |
50cc42ff VJJ |
1364 | struct p9_qid *qid) |
1365 | { | |
1366 | int err = 0; | |
1367 | struct p9_client *clnt; | |
1368 | struct p9_req_t *req; | |
1369 | ||
5d385153 | 1370 | p9_debug(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
50cc42ff VJJ |
1371 | dfid->fid, name, symtgt); |
1372 | clnt = dfid->clnt; | |
1373 | ||
f791f7c5 | 1374 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, |
50cc42ff VJJ |
1375 | gid); |
1376 | if (IS_ERR(req)) { | |
1377 | err = PTR_ERR(req); | |
1378 | goto error; | |
1379 | } | |
1380 | ||
1381 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1382 | if (err) { | |
348b5901 | 1383 | trace_9p_protocol_dump(clnt, req->rc); |
50cc42ff VJJ |
1384 | goto free_and_error; |
1385 | } | |
1386 | ||
5d385153 | 1387 | p9_debug(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
50cc42ff VJJ |
1388 | qid->type, (unsigned long long)qid->path, qid->version); |
1389 | ||
1390 | free_and_error: | |
1391 | p9_free_req(clnt, req); | |
1392 | error: | |
1393 | return err; | |
1394 | } | |
1395 | EXPORT_SYMBOL(p9_client_symlink); | |
1396 | ||
652df9a7 VJJ |
1397 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1398 | { | |
1399 | struct p9_client *clnt; | |
1400 | struct p9_req_t *req; | |
1401 | ||
5d385153 | 1402 | p9_debug(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
652df9a7 VJJ |
1403 | dfid->fid, oldfid->fid, newname); |
1404 | clnt = dfid->clnt; | |
1405 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1406 | newname); | |
1407 | if (IS_ERR(req)) | |
1408 | return PTR_ERR(req); | |
1409 | ||
5d385153 | 1410 | p9_debug(P9_DEBUG_9P, "<<< RLINK\n"); |
652df9a7 VJJ |
1411 | p9_free_req(clnt, req); |
1412 | return 0; | |
1413 | } | |
1414 | EXPORT_SYMBOL(p9_client_link); | |
1415 | ||
b165d601 | 1416 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc VJJ |
1417 | { |
1418 | int err; | |
1419 | struct p9_client *clnt; | |
1420 | struct p9_req_t *req; | |
1421 | ||
5d385153 | 1422 | p9_debug(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
b165d601 | 1423 | fid->fid, datasync); |
920e65dc VJJ |
1424 | err = 0; |
1425 | clnt = fid->clnt; | |
1426 | ||
b165d601 | 1427 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc VJJ |
1428 | if (IS_ERR(req)) { |
1429 | err = PTR_ERR(req); | |
1430 | goto error; | |
1431 | } | |
1432 | ||
5d385153 | 1433 | p9_debug(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
920e65dc VJJ |
1434 | |
1435 | p9_free_req(clnt, req); | |
1436 | ||
1437 | error: | |
1438 | return err; | |
1439 | } | |
1440 | EXPORT_SYMBOL(p9_client_fsync); | |
1441 | ||
bd238fb4 LI |
1442 | int p9_client_clunk(struct p9_fid *fid) |
1443 | { | |
1444 | int err; | |
bd238fb4 | 1445 | struct p9_client *clnt; |
51a87c55 | 1446 | struct p9_req_t *req; |
208f3c28 | 1447 | int retries = 0; |
bd238fb4 | 1448 | |
8e44a080 | 1449 | if (!fid) { |
5d385153 JP |
1450 | pr_warn("%s (%d): Trying to clunk with NULL fid\n", |
1451 | __func__, task_pid_nr(current)); | |
8e44a080 | 1452 | dump_stack(); |
1453 | return 0; | |
1454 | } | |
1455 | ||
208f3c28 JG |
1456 | again: |
1457 | p9_debug(P9_DEBUG_9P, ">>> TCLUNK fid %d (try %d)\n", fid->fid, | |
1458 | retries); | |
bd238fb4 | 1459 | err = 0; |
bd238fb4 LI |
1460 | clnt = fid->clnt; |
1461 | ||
51a87c55 EVH |
1462 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1463 | if (IS_ERR(req)) { | |
1464 | err = PTR_ERR(req); | |
1465 | goto error; | |
bd238fb4 LI |
1466 | } |
1467 | ||
5d385153 | 1468 | p9_debug(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1469 | |
51a87c55 | 1470 | p9_free_req(clnt, req); |
51a87c55 | 1471 | error: |
5034990e AK |
1472 | /* |
1473 | * Fid is not valid even after a failed clunk | |
208f3c28 JG |
1474 | * If interrupted, retry once then give up and |
1475 | * leak fid until umount. | |
5034990e | 1476 | */ |
208f3c28 JG |
1477 | if (err == -ERESTARTSYS) { |
1478 | if (retries++ == 0) | |
1479 | goto again; | |
1480 | } else | |
1481 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1482 | return err; |
1483 | } | |
1484 | EXPORT_SYMBOL(p9_client_clunk); | |
1485 | ||
1486 | int p9_client_remove(struct p9_fid *fid) | |
1487 | { | |
1488 | int err; | |
bd238fb4 | 1489 | struct p9_client *clnt; |
51a87c55 | 1490 | struct p9_req_t *req; |
bd238fb4 | 1491 | |
5d385153 | 1492 | p9_debug(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1493 | err = 0; |
bd238fb4 LI |
1494 | clnt = fid->clnt; |
1495 | ||
51a87c55 EVH |
1496 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1497 | if (IS_ERR(req)) { | |
1498 | err = PTR_ERR(req); | |
1499 | goto error; | |
bd238fb4 LI |
1500 | } |
1501 | ||
5d385153 | 1502 | p9_debug(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1503 | |
51a87c55 | 1504 | p9_free_req(clnt, req); |
51a87c55 | 1505 | error: |
208f3c28 JG |
1506 | if (err == -ERESTARTSYS) |
1507 | p9_client_clunk(fid); | |
1508 | else | |
1509 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1510 | return err; |
1511 | } | |
1512 | EXPORT_SYMBOL(p9_client_remove); | |
1513 | ||
48e370ff AK |
1514 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
1515 | { | |
1516 | int err = 0; | |
1517 | struct p9_req_t *req; | |
1518 | struct p9_client *clnt; | |
1519 | ||
5d385153 | 1520 | p9_debug(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", |
48e370ff AK |
1521 | dfid->fid, name, flags); |
1522 | ||
1523 | clnt = dfid->clnt; | |
1524 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); | |
1525 | if (IS_ERR(req)) { | |
1526 | err = PTR_ERR(req); | |
1527 | goto error; | |
1528 | } | |
5d385153 | 1529 | p9_debug(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); |
48e370ff AK |
1530 | |
1531 | p9_free_req(clnt, req); | |
1532 | error: | |
1533 | return err; | |
1534 | } | |
1535 | EXPORT_SYMBOL(p9_client_unlinkat); | |
1536 | ||
0fc9655e | 1537 | int |
e1200fe6 | 1538 | p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) |
bd238fb4 | 1539 | { |
e1200fe6 | 1540 | struct p9_client *clnt = fid->clnt; |
abfa034e | 1541 | struct p9_req_t *req; |
e1200fe6 | 1542 | int total = 0; |
bd238fb4 | 1543 | |
5d385153 | 1544 | p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
e1200fe6 AV |
1545 | fid->fid, (unsigned long long) offset, (int)iov_iter_count(to)); |
1546 | ||
1547 | while (iov_iter_count(to)) { | |
1548 | int count = iov_iter_count(to); | |
1549 | int rsize, non_zc = 0; | |
1550 | char *dataptr; | |
1551 | ||
1552 | rsize = fid->iounit; | |
1553 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1554 | rsize = clnt->msize - P9_IOHDRSZ; | |
1555 | ||
1556 | if (count < rsize) | |
1557 | rsize = count; | |
1558 | ||
1559 | /* Don't bother zerocopy for small IO (< 1024) */ | |
1560 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1561 | /* | |
1562 | * response header len is 11 | |
1563 | * PDU Header(7) + IO Size (4) | |
1564 | */ | |
1565 | req = p9_client_zc_rpc(clnt, P9_TREAD, to, NULL, rsize, | |
1566 | 0, 11, "dqd", fid->fid, | |
1567 | offset, rsize); | |
1568 | } else { | |
1569 | non_zc = 1; | |
1570 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, | |
1571 | rsize); | |
1572 | } | |
1573 | if (IS_ERR(req)) { | |
1574 | *err = PTR_ERR(req); | |
1575 | break; | |
1576 | } | |
bd238fb4 | 1577 | |
e1200fe6 AV |
1578 | *err = p9pdu_readf(req->rc, clnt->proto_version, |
1579 | "D", &count, &dataptr); | |
1580 | if (*err) { | |
1581 | trace_9p_protocol_dump(clnt, req->rc); | |
1582 | p9_free_req(clnt, req); | |
1583 | break; | |
1584 | } | |
bd238fb4 | 1585 | |
e1200fe6 AV |
1586 | p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
1587 | if (!count) { | |
1588 | p9_free_req(clnt, req); | |
1589 | break; | |
1590 | } | |
bd238fb4 | 1591 | |
e1200fe6 AV |
1592 | if (non_zc) { |
1593 | int n = copy_to_iter(dataptr, count, to); | |
1594 | total += n; | |
1595 | offset += n; | |
1596 | if (n != count) { | |
1597 | *err = -EFAULT; | |
1598 | p9_free_req(clnt, req); | |
1599 | break; | |
1600 | } | |
1601 | } else { | |
1602 | iov_iter_advance(to, count); | |
1603 | total += count; | |
1604 | offset += count; | |
1605 | } | |
1606 | p9_free_req(clnt, req); | |
51a87c55 | 1607 | } |
e1200fe6 | 1608 | return total; |
bd238fb4 | 1609 | } |
0fc9655e | 1610 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1611 | |
1612 | int | |
070b3656 | 1613 | p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err) |
bd238fb4 | 1614 | { |
070b3656 | 1615 | struct p9_client *clnt = fid->clnt; |
51a87c55 | 1616 | struct p9_req_t *req; |
070b3656 AV |
1617 | int total = 0; |
1618 | ||
1619 | p9_debug(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %zd\n", | |
1620 | fid->fid, (unsigned long long) offset, | |
1621 | iov_iter_count(from)); | |
1622 | ||
1623 | while (iov_iter_count(from)) { | |
1624 | int count = iov_iter_count(from); | |
1625 | int rsize = fid->iounit; | |
1626 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1627 | rsize = clnt->msize - P9_IOHDRSZ; | |
1628 | ||
1629 | if (count < rsize) | |
1630 | rsize = count; | |
1631 | ||
1632 | /* Don't bother zerocopy for small IO (< 1024) */ | |
1633 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1634 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, from, 0, | |
1635 | rsize, P9_ZC_HDR_SZ, "dqd", | |
1636 | fid->fid, offset, rsize); | |
1637 | } else { | |
1638 | req = p9_client_rpc(clnt, P9_TWRITE, "dqV", fid->fid, | |
1639 | offset, rsize, from); | |
1640 | } | |
1641 | if (IS_ERR(req)) { | |
1642 | *err = PTR_ERR(req); | |
1643 | break; | |
1644 | } | |
bd238fb4 | 1645 | |
070b3656 AV |
1646 | *err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
1647 | if (*err) { | |
1648 | trace_9p_protocol_dump(clnt, req->rc); | |
1649 | p9_free_req(clnt, req); | |
1650 | } | |
1fc52481 | 1651 | |
070b3656 | 1652 | p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
0fc9655e | 1653 | |
070b3656 AV |
1654 | p9_free_req(clnt, req); |
1655 | iov_iter_advance(from, count); | |
1656 | total += count; | |
1657 | offset += count; | |
e7f4b8f1 | 1658 | } |
070b3656 | 1659 | return total; |
bd238fb4 | 1660 | } |
0fc9655e | 1661 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1662 | |
51a87c55 | 1663 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1664 | { |
51a87c55 EVH |
1665 | int err; |
1666 | struct p9_client *clnt; | |
1667 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1668 | struct p9_req_t *req; | |
1669 | u16 ignored; | |
5503ac56 | 1670 | |
5d385153 | 1671 | p9_debug(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1672 | |
5503ac56 EVH |
1673 | if (!ret) |
1674 | return ERR_PTR(-ENOMEM); | |
1675 | ||
bd238fb4 | 1676 | err = 0; |
bd238fb4 LI |
1677 | clnt = fid->clnt; |
1678 | ||
51a87c55 EVH |
1679 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1680 | if (IS_ERR(req)) { | |
1681 | err = PTR_ERR(req); | |
bd238fb4 LI |
1682 | goto error; |
1683 | } | |
1684 | ||
342fee1d | 1685 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1686 | if (err) { |
348b5901 | 1687 | trace_9p_protocol_dump(clnt, req->rc); |
eedfe1c4 AK |
1688 | p9_free_req(clnt, req); |
1689 | goto error; | |
e7f4b8f1 | 1690 | } |
bd238fb4 | 1691 | |
5d385153 | 1692 | p9_debug(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1693 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1694 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1695 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1696 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1697 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1698 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1699 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1700 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
447c5094 EB |
1701 | from_kuid(&init_user_ns, ret->n_uid), |
1702 | from_kgid(&init_user_ns, ret->n_gid), | |
1703 | from_kuid(&init_user_ns, ret->n_muid)); | |
bd238fb4 | 1704 | |
742b11a7 LI |
1705 | p9_free_req(clnt, req); |
1706 | return ret; | |
1707 | ||
bd238fb4 | 1708 | error: |
742b11a7 LI |
1709 | kfree(ret); |
1710 | return ERR_PTR(err); | |
bd238fb4 LI |
1711 | } |
1712 | EXPORT_SYMBOL(p9_client_stat); | |
1713 | ||
f0853122 SK |
1714 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1715 | u64 request_mask) | |
1716 | { | |
1717 | int err; | |
1718 | struct p9_client *clnt; | |
1719 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1720 | GFP_KERNEL); | |
1721 | struct p9_req_t *req; | |
1722 | ||
5d385153 | 1723 | p9_debug(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
f0853122 SK |
1724 | fid->fid, request_mask); |
1725 | ||
1726 | if (!ret) | |
1727 | return ERR_PTR(-ENOMEM); | |
1728 | ||
1729 | err = 0; | |
1730 | clnt = fid->clnt; | |
1731 | ||
1732 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1733 | if (IS_ERR(req)) { | |
1734 | err = PTR_ERR(req); | |
1735 | goto error; | |
1736 | } | |
1737 | ||
1738 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1739 | if (err) { | |
348b5901 | 1740 | trace_9p_protocol_dump(clnt, req->rc); |
f0853122 SK |
1741 | p9_free_req(clnt, req); |
1742 | goto error; | |
1743 | } | |
1744 | ||
5d385153 | 1745 | p9_debug(P9_DEBUG_9P, |
f0853122 SK |
1746 | "<<< RGETATTR st_result_mask=%lld\n" |
1747 | "<<< qid=%x.%llx.%x\n" | |
1748 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1749 | "<<< st_uid=%d st_gid=%d\n" | |
1750 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1751 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1752 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1753 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1754 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1755 | "<<< st_gen=%lld st_data_version=%lld", | |
1756 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
447c5094 EB |
1757 | ret->qid.version, ret->st_mode, ret->st_nlink, |
1758 | from_kuid(&init_user_ns, ret->st_uid), | |
1759 | from_kgid(&init_user_ns, ret->st_gid), | |
1760 | ret->st_rdev, ret->st_size, ret->st_blksize, | |
f0853122 SK |
1761 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
1762 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1763 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1764 | ret->st_gen, ret->st_data_version); | |
1765 | ||
1766 | p9_free_req(clnt, req); | |
1767 | return ret; | |
1768 | ||
1769 | error: | |
1770 | kfree(ret); | |
1771 | return ERR_PTR(err); | |
1772 | } | |
1773 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1774 | ||
342fee1d | 1775 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1776 | { |
1777 | int ret; | |
1778 | ||
9d6939da | 1779 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1780 | /* size[2] type[2] dev[4] qid[13] */ |
1781 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1782 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1783 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1784 | |
1785 | if (wst->name) | |
1786 | ret += strlen(wst->name); | |
1787 | if (wst->uid) | |
1788 | ret += strlen(wst->uid); | |
1789 | if (wst->gid) | |
1790 | ret += strlen(wst->gid); | |
1791 | if (wst->muid) | |
1792 | ret += strlen(wst->muid); | |
1793 | ||
c56e4acf SK |
1794 | if ((proto_version == p9_proto_2000u) || |
1795 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1796 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1797 | if (wst->extension) | |
1798 | ret += strlen(wst->extension); | |
1799 | } | |
1800 | ||
1801 | return ret; | |
1802 | } | |
1803 | ||
bd238fb4 LI |
1804 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1805 | { | |
1806 | int err; | |
51a87c55 | 1807 | struct p9_req_t *req; |
bd238fb4 LI |
1808 | struct p9_client *clnt; |
1809 | ||
453ed90d LI |
1810 | err = 0; |
1811 | clnt = fid->clnt; | |
342fee1d | 1812 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
5d385153 JP |
1813 | p9_debug(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
1814 | p9_debug(P9_DEBUG_9P, | |
e7f4b8f1 EVH |
1815 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1816 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1817 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1818 | " uid=%d gid=%d n_muid=%d\n", | |
1819 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1820 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1821 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1822 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
447c5094 EB |
1823 | from_kuid(&init_user_ns, wst->n_uid), |
1824 | from_kgid(&init_user_ns, wst->n_gid), | |
1825 | from_kuid(&init_user_ns, wst->n_muid)); | |
bd238fb4 | 1826 | |
9d6939da | 1827 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1828 | if (IS_ERR(req)) { |
1829 | err = PTR_ERR(req); | |
1830 | goto error; | |
bd238fb4 LI |
1831 | } |
1832 | ||
5d385153 | 1833 | p9_debug(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1834 | |
51a87c55 EVH |
1835 | p9_free_req(clnt, req); |
1836 | error: | |
bd238fb4 LI |
1837 | return err; |
1838 | } | |
1839 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1840 | |
87d7845a SK |
1841 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1842 | { | |
1843 | int err; | |
1844 | struct p9_req_t *req; | |
1845 | struct p9_client *clnt; | |
1846 | ||
1847 | err = 0; | |
1848 | clnt = fid->clnt; | |
5d385153 JP |
1849 | p9_debug(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
1850 | p9_debug(P9_DEBUG_9P, | |
87d7845a SK |
1851 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
1852 | " atime_sec=%lld atime_nsec=%lld\n" | |
1853 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
447c5094 EB |
1854 | p9attr->valid, p9attr->mode, |
1855 | from_kuid(&init_user_ns, p9attr->uid), | |
1856 | from_kgid(&init_user_ns, p9attr->gid), | |
87d7845a SK |
1857 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
1858 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1859 | ||
1860 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1861 | ||
1862 | if (IS_ERR(req)) { | |
1863 | err = PTR_ERR(req); | |
1864 | goto error; | |
1865 | } | |
5d385153 | 1866 | p9_debug(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
87d7845a SK |
1867 | p9_free_req(clnt, req); |
1868 | error: | |
1869 | return err; | |
1870 | } | |
1871 | EXPORT_SYMBOL(p9_client_setattr); | |
1872 | ||
bda8e775 SK |
1873 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1874 | { | |
1875 | int err; | |
1876 | struct p9_req_t *req; | |
1877 | struct p9_client *clnt; | |
1878 | ||
1879 | err = 0; | |
1880 | clnt = fid->clnt; | |
1881 | ||
5d385153 | 1882 | p9_debug(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
bda8e775 SK |
1883 | |
1884 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1885 | if (IS_ERR(req)) { | |
1886 | err = PTR_ERR(req); | |
1887 | goto error; | |
1888 | } | |
1889 | ||
1890 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1891 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1892 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1893 | if (err) { | |
348b5901 | 1894 | trace_9p_protocol_dump(clnt, req->rc); |
bda8e775 SK |
1895 | p9_free_req(clnt, req); |
1896 | goto error; | |
1897 | } | |
1898 | ||
5d385153 | 1899 | p9_debug(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
bda8e775 SK |
1900 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
1901 | "fsid %llu namelen %ld\n", | |
1902 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1903 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1904 | sb->fsid, (long int)sb->namelen); | |
1905 | ||
1906 | p9_free_req(clnt, req); | |
1907 | error: | |
1908 | return err; | |
1909 | } | |
1910 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda | 1911 | |
9e8fb38e AK |
1912 | int p9_client_rename(struct p9_fid *fid, |
1913 | struct p9_fid *newdirfid, const char *name) | |
4681dbda SK |
1914 | { |
1915 | int err; | |
1916 | struct p9_req_t *req; | |
1917 | struct p9_client *clnt; | |
1918 | ||
1919 | err = 0; | |
1920 | clnt = fid->clnt; | |
1921 | ||
5d385153 | 1922 | p9_debug(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
4681dbda SK |
1923 | fid->fid, newdirfid->fid, name); |
1924 | ||
1925 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1926 | newdirfid->fid, name); | |
1927 | if (IS_ERR(req)) { | |
1928 | err = PTR_ERR(req); | |
1929 | goto error; | |
1930 | } | |
1931 | ||
5d385153 | 1932 | p9_debug(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
4681dbda SK |
1933 | |
1934 | p9_free_req(clnt, req); | |
1935 | error: | |
1936 | return err; | |
1937 | } | |
1938 | EXPORT_SYMBOL(p9_client_rename); | |
1939 | ||
9e8fb38e AK |
1940 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
1941 | struct p9_fid *newdirfid, const char *new_name) | |
1942 | { | |
1943 | int err; | |
1944 | struct p9_req_t *req; | |
1945 | struct p9_client *clnt; | |
1946 | ||
1947 | err = 0; | |
1948 | clnt = olddirfid->clnt; | |
1949 | ||
5d385153 | 1950 | p9_debug(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
9e8fb38e AK |
1951 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, |
1952 | newdirfid->fid, new_name); | |
1953 | ||
1954 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, | |
1955 | old_name, newdirfid->fid, new_name); | |
1956 | if (IS_ERR(req)) { | |
1957 | err = PTR_ERR(req); | |
1958 | goto error; | |
1959 | } | |
1960 | ||
5d385153 | 1961 | p9_debug(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", |
9e8fb38e AK |
1962 | newdirfid->fid, new_name); |
1963 | ||
1964 | p9_free_req(clnt, req); | |
1965 | error: | |
1966 | return err; | |
1967 | } | |
1968 | EXPORT_SYMBOL(p9_client_renameat); | |
1969 | ||
0ef63f34 AK |
1970 | /* |
1971 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1972 | */ | |
1973 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1974 | const char *attr_name, u64 *attr_size) | |
1975 | { | |
1976 | int err; | |
1977 | struct p9_req_t *req; | |
1978 | struct p9_client *clnt; | |
1979 | struct p9_fid *attr_fid; | |
1980 | ||
1981 | err = 0; | |
1982 | clnt = file_fid->clnt; | |
1983 | attr_fid = p9_fid_create(clnt); | |
1984 | if (IS_ERR(attr_fid)) { | |
1985 | err = PTR_ERR(attr_fid); | |
1986 | attr_fid = NULL; | |
1987 | goto error; | |
1988 | } | |
5d385153 | 1989 | p9_debug(P9_DEBUG_9P, |
0ef63f34 AK |
1990 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
1991 | file_fid->fid, attr_fid->fid, attr_name); | |
1992 | ||
1993 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1994 | file_fid->fid, attr_fid->fid, attr_name); | |
1995 | if (IS_ERR(req)) { | |
1996 | err = PTR_ERR(req); | |
1997 | goto error; | |
1998 | } | |
1999 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
2000 | if (err) { | |
348b5901 | 2001 | trace_9p_protocol_dump(clnt, req->rc); |
0ef63f34 AK |
2002 | p9_free_req(clnt, req); |
2003 | goto clunk_fid; | |
2004 | } | |
2005 | p9_free_req(clnt, req); | |
5d385153 | 2006 | p9_debug(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
0ef63f34 AK |
2007 | attr_fid->fid, *attr_size); |
2008 | return attr_fid; | |
2009 | clunk_fid: | |
2010 | p9_client_clunk(attr_fid); | |
2011 | attr_fid = NULL; | |
2012 | error: | |
2013 | if (attr_fid && (attr_fid != file_fid)) | |
2014 | p9_fid_destroy(attr_fid); | |
2015 | ||
2016 | return ERR_PTR(err); | |
2017 | } | |
2018 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
2019 | ||
eda25e46 AK |
2020 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
2021 | u64 attr_size, int flags) | |
2022 | { | |
2023 | int err; | |
2024 | struct p9_req_t *req; | |
2025 | struct p9_client *clnt; | |
2026 | ||
5d385153 | 2027 | p9_debug(P9_DEBUG_9P, |
eda25e46 AK |
2028 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
2029 | fid->fid, name, (long long)attr_size, flags); | |
2030 | err = 0; | |
2031 | clnt = fid->clnt; | |
2032 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
2033 | fid->fid, name, attr_size, flags); | |
2034 | if (IS_ERR(req)) { | |
2035 | err = PTR_ERR(req); | |
2036 | goto error; | |
2037 | } | |
5d385153 | 2038 | p9_debug(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
eda25e46 AK |
2039 | p9_free_req(clnt, req); |
2040 | error: | |
2041 | return err; | |
2042 | } | |
2043 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
2044 | ||
7751bdb3 SK |
2045 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
2046 | { | |
abfa034e | 2047 | int err, rsize, non_zc = 0; |
7751bdb3 SK |
2048 | struct p9_client *clnt; |
2049 | struct p9_req_t *req; | |
2050 | char *dataptr; | |
4f3b35c1 AV |
2051 | struct kvec kv = {.iov_base = data, .iov_len = count}; |
2052 | struct iov_iter to; | |
2053 | ||
2054 | iov_iter_kvec(&to, READ | ITER_KVEC, &kv, 1, count); | |
7751bdb3 | 2055 | |
5d385153 | 2056 | p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
95c96174 | 2057 | fid->fid, (unsigned long long) offset, count); |
7751bdb3 SK |
2058 | |
2059 | err = 0; | |
2060 | clnt = fid->clnt; | |
7751bdb3 SK |
2061 | |
2062 | rsize = fid->iounit; | |
2063 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
2064 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
2065 | ||
2066 | if (count < rsize) | |
2067 | rsize = count; | |
2068 | ||
abfa034e AK |
2069 | /* Don't bother zerocopy for small IO (< 1024) */ |
2070 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
2071 | /* | |
2072 | * response header len is 11 | |
2073 | * PDU Header(7) + IO Size (4) | |
2074 | */ | |
4f3b35c1 AV |
2075 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, &to, NULL, rsize, 0, |
2076 | 11, "dqd", fid->fid, offset, rsize); | |
2c66523f | 2077 | } else { |
abfa034e | 2078 | non_zc = 1; |
2c66523f | 2079 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e | 2080 | offset, rsize); |
2c66523f | 2081 | } |
7751bdb3 SK |
2082 | if (IS_ERR(req)) { |
2083 | err = PTR_ERR(req); | |
2084 | goto error; | |
2085 | } | |
2086 | ||
2087 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
2088 | if (err) { | |
348b5901 | 2089 | trace_9p_protocol_dump(clnt, req->rc); |
7751bdb3 SK |
2090 | goto free_and_error; |
2091 | } | |
2092 | ||
5d385153 | 2093 | p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
7751bdb3 | 2094 | |
abfa034e | 2095 | if (non_zc) |
7751bdb3 SK |
2096 | memmove(data, dataptr, count); |
2097 | ||
2098 | p9_free_req(clnt, req); | |
2099 | return count; | |
2100 | ||
2101 | free_and_error: | |
2102 | p9_free_req(clnt, req); | |
2103 | error: | |
2104 | return err; | |
2105 | } | |
2106 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
2107 | |
2108 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
f791f7c5 | 2109 | dev_t rdev, kgid_t gid, struct p9_qid *qid) |
4b43516a MK |
2110 | { |
2111 | int err; | |
2112 | struct p9_client *clnt; | |
2113 | struct p9_req_t *req; | |
2114 | ||
2115 | err = 0; | |
2116 | clnt = fid->clnt; | |
5d385153 | 2117 | p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
4b43516a | 2118 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
f791f7c5 | 2119 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, |
4b43516a MK |
2120 | MAJOR(rdev), MINOR(rdev), gid); |
2121 | if (IS_ERR(req)) | |
2122 | return PTR_ERR(req); | |
2123 | ||
2124 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2125 | if (err) { | |
348b5901 | 2126 | trace_9p_protocol_dump(clnt, req->rc); |
4b43516a MK |
2127 | goto error; |
2128 | } | |
5d385153 | 2129 | p9_debug(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
4b43516a MK |
2130 | (unsigned long long)qid->path, qid->version); |
2131 | ||
2132 | error: | |
2133 | p9_free_req(clnt, req); | |
2134 | return err; | |
2135 | ||
2136 | } | |
2137 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
2138 | |
2139 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
f791f7c5 | 2140 | kgid_t gid, struct p9_qid *qid) |
01a622bd MK |
2141 | { |
2142 | int err; | |
2143 | struct p9_client *clnt; | |
2144 | struct p9_req_t *req; | |
2145 | ||
2146 | err = 0; | |
2147 | clnt = fid->clnt; | |
5d385153 | 2148 | p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
f791f7c5 EB |
2149 | fid->fid, name, mode, from_kgid(&init_user_ns, gid)); |
2150 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, | |
01a622bd MK |
2151 | gid); |
2152 | if (IS_ERR(req)) | |
2153 | return PTR_ERR(req); | |
2154 | ||
2155 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2156 | if (err) { | |
348b5901 | 2157 | trace_9p_protocol_dump(clnt, req->rc); |
01a622bd MK |
2158 | goto error; |
2159 | } | |
5d385153 | 2160 | p9_debug(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
01a622bd MK |
2161 | (unsigned long long)qid->path, qid->version); |
2162 | ||
2163 | error: | |
2164 | p9_free_req(clnt, req); | |
2165 | return err; | |
2166 | ||
2167 | } | |
2168 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
a099027c MK |
2169 | |
2170 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
2171 | { | |
2172 | int err; | |
2173 | struct p9_client *clnt; | |
2174 | struct p9_req_t *req; | |
2175 | ||
2176 | err = 0; | |
2177 | clnt = fid->clnt; | |
5d385153 | 2178 | p9_debug(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
a099027c MK |
2179 | "start %lld length %lld proc_id %d client_id %s\n", |
2180 | fid->fid, flock->type, flock->flags, flock->start, | |
2181 | flock->length, flock->proc_id, flock->client_id); | |
2182 | ||
2183 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
2184 | flock->flags, flock->start, flock->length, | |
2185 | flock->proc_id, flock->client_id); | |
2186 | ||
2187 | if (IS_ERR(req)) | |
2188 | return PTR_ERR(req); | |
2189 | ||
2190 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
2191 | if (err) { | |
348b5901 | 2192 | trace_9p_protocol_dump(clnt, req->rc); |
a099027c MK |
2193 | goto error; |
2194 | } | |
5d385153 | 2195 | p9_debug(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
a099027c MK |
2196 | error: |
2197 | p9_free_req(clnt, req); | |
2198 | return err; | |
2199 | ||
2200 | } | |
2201 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1d769cd1 MK |
2202 | |
2203 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
2204 | { | |
2205 | int err; | |
2206 | struct p9_client *clnt; | |
2207 | struct p9_req_t *req; | |
2208 | ||
2209 | err = 0; | |
2210 | clnt = fid->clnt; | |
5d385153 | 2211 | p9_debug(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
1d769cd1 MK |
2212 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
2213 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2214 | ||
2215 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
2216 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2217 | ||
2218 | if (IS_ERR(req)) | |
2219 | return PTR_ERR(req); | |
2220 | ||
2221 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
2222 | &glock->start, &glock->length, &glock->proc_id, | |
2223 | &glock->client_id); | |
2224 | if (err) { | |
348b5901 | 2225 | trace_9p_protocol_dump(clnt, req->rc); |
1d769cd1 MK |
2226 | goto error; |
2227 | } | |
5d385153 | 2228 | p9_debug(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
1d769cd1 MK |
2229 | "proc_id %d client_id %s\n", glock->type, glock->start, |
2230 | glock->length, glock->proc_id, glock->client_id); | |
2231 | error: | |
2232 | p9_free_req(clnt, req); | |
2233 | return err; | |
2234 | } | |
2235 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
329176cc MK |
2236 | |
2237 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
2238 | { | |
2239 | int err; | |
2240 | struct p9_client *clnt; | |
2241 | struct p9_req_t *req; | |
2242 | ||
2243 | err = 0; | |
2244 | clnt = fid->clnt; | |
5d385153 | 2245 | p9_debug(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
329176cc MK |
2246 | |
2247 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
2248 | if (IS_ERR(req)) | |
2249 | return PTR_ERR(req); | |
2250 | ||
2251 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
2252 | if (err) { | |
348b5901 | 2253 | trace_9p_protocol_dump(clnt, req->rc); |
329176cc MK |
2254 | goto error; |
2255 | } | |
5d385153 | 2256 | p9_debug(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
329176cc MK |
2257 | error: |
2258 | p9_free_req(clnt, req); | |
2259 | return err; | |
2260 | } | |
2261 | EXPORT_SYMBOL(p9_client_readlink); |