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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> |
3f07c014 | 35 | #include <linux/sched/signal.h> |
bd238fb4 | 36 | #include <linux/uaccess.h> |
4f3b35c1 | 37 | #include <linux/uio.h> |
bd238fb4 | 38 | #include <net/9p/9p.h> |
fb0466c3 | 39 | #include <linux/parser.h> |
c4fac910 | 40 | #include <linux/seq_file.h> |
bd238fb4 | 41 | #include <net/9p/client.h> |
8b81ef58 | 42 | #include <net/9p/transport.h> |
51a87c55 | 43 | #include "protocol.h" |
bd238fb4 | 44 | |
348b5901 AK |
45 | #define CREATE_TRACE_POINTS |
46 | #include <trace/events/9p.h> | |
47 | ||
8a0dc95f EVH |
48 | /* |
49 | * Client Option Parsing (code inspired by NFS code) | |
50 | * - a little lazy - parse all client options | |
51 | */ | |
52 | ||
53 | enum { | |
54 | Opt_msize, | |
55 | Opt_trans, | |
56 | Opt_legacy, | |
0fb80abd | 57 | Opt_version, |
8a0dc95f EVH |
58 | Opt_err, |
59 | }; | |
60 | ||
a447c093 | 61 | static const match_table_t tokens = { |
8a0dc95f EVH |
62 | {Opt_msize, "msize=%u"}, |
63 | {Opt_legacy, "noextend"}, | |
64 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 65 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
66 | {Opt_err, NULL}, |
67 | }; | |
68 | ||
342fee1d SK |
69 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
70 | { | |
a02cec21 | 71 | return clnt->proto_version == p9_proto_2000L; |
342fee1d SK |
72 | } |
73 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
74 | ||
75 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
76 | { | |
a02cec21 | 77 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
78 | } |
79 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
80 | ||
c4fac910 DH |
81 | int p9_show_client_options(struct seq_file *m, struct p9_client *clnt) |
82 | { | |
83 | if (clnt->msize != 8192) | |
84 | seq_printf(m, ",msize=%u", clnt->msize); | |
61b272c3 | 85 | seq_printf(m, ",trans=%s", clnt->trans_mod->name); |
c4fac910 DH |
86 | |
87 | switch (clnt->proto_version) { | |
88 | case p9_proto_legacy: | |
89 | seq_puts(m, ",noextend"); | |
90 | break; | |
91 | case p9_proto_2000u: | |
92 | seq_puts(m, ",version=9p2000.u"); | |
93 | break; | |
94 | case p9_proto_2000L: | |
95 | /* Default */ | |
96 | break; | |
97 | } | |
98 | ||
99 | if (clnt->trans_mod->show_options) | |
100 | return clnt->trans_mod->show_options(m, clnt); | |
101 | return 0; | |
102 | } | |
103 | EXPORT_SYMBOL(p9_show_client_options); | |
104 | ||
43def35c SD |
105 | /* |
106 | * Some error codes are taken directly from the server replies, | |
107 | * make sure they are valid. | |
108 | */ | |
109 | static int safe_errno(int err) | |
110 | { | |
111 | if ((err > 0) || (err < -MAX_ERRNO)) { | |
112 | p9_debug(P9_DEBUG_ERROR, "Invalid error code %d\n", err); | |
113 | return -EPROTO; | |
114 | } | |
115 | return err; | |
116 | } | |
117 | ||
118 | ||
0fb80abd | 119 | /* Interpret mount option for protocol version */ |
4d63055f | 120 | static int get_protocol_version(char *s) |
0fb80abd | 121 | { |
3dc9fef6 DC |
122 | int version = -EINVAL; |
123 | ||
4d63055f | 124 | if (!strcmp(s, "9p2000")) { |
0fb80abd | 125 | version = p9_proto_legacy; |
5d385153 | 126 | p9_debug(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
4d63055f | 127 | } else if (!strcmp(s, "9p2000.u")) { |
0fb80abd | 128 | version = p9_proto_2000u; |
5d385153 | 129 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
4d63055f | 130 | } else if (!strcmp(s, "9p2000.L")) { |
45bc21ed | 131 | version = p9_proto_2000L; |
5d385153 | 132 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
4d63055f | 133 | } else |
5d385153 | 134 | pr_info("Unknown protocol version %s\n", s); |
4d63055f | 135 | |
0fb80abd SK |
136 | return version; |
137 | } | |
138 | ||
8a0dc95f | 139 | /** |
0e15597e AK |
140 | * parse_options - parse mount options into client structure |
141 | * @opts: options string passed from mount | |
142 | * @clnt: existing v9fs client information | |
8a0dc95f | 143 | * |
bb8ffdfc | 144 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
145 | */ |
146 | ||
bb8ffdfc | 147 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 148 | { |
d8c8a9e3 | 149 | char *options, *tmp_options; |
8a0dc95f EVH |
150 | char *p; |
151 | substring_t args[MAX_OPT_ARGS]; | |
152 | int option; | |
4d63055f | 153 | char *s; |
bb8ffdfc | 154 | int ret = 0; |
8a0dc95f | 155 | |
095e7999 | 156 | clnt->proto_version = p9_proto_2000L; |
8a0dc95f EVH |
157 | clnt->msize = 8192; |
158 | ||
bb8ffdfc EVH |
159 | if (!opts) |
160 | return 0; | |
161 | ||
d8c8a9e3 EVH |
162 | tmp_options = kstrdup(opts, GFP_KERNEL); |
163 | if (!tmp_options) { | |
5d385153 JP |
164 | p9_debug(P9_DEBUG_ERROR, |
165 | "failed to allocate copy of option string\n"); | |
bb8ffdfc EVH |
166 | return -ENOMEM; |
167 | } | |
d8c8a9e3 | 168 | options = tmp_options; |
8a0dc95f EVH |
169 | |
170 | while ((p = strsep(&options, ",")) != NULL) { | |
4d5077f1 | 171 | int token, r; |
8a0dc95f EVH |
172 | if (!*p) |
173 | continue; | |
174 | token = match_token(p, tokens, args); | |
4d5077f1 AK |
175 | switch (token) { |
176 | case Opt_msize: | |
177 | r = match_int(&args[0], &option); | |
bb8ffdfc | 178 | if (r < 0) { |
5d385153 JP |
179 | p9_debug(P9_DEBUG_ERROR, |
180 | "integer field, but no integer?\n"); | |
bb8ffdfc | 181 | ret = r; |
8a0dc95f EVH |
182 | continue; |
183 | } | |
6bd03a88 DM |
184 | if (option < 4096) { |
185 | p9_debug(P9_DEBUG_ERROR, | |
186 | "msize should be at least 4k\n"); | |
187 | ret = -EINVAL; | |
188 | continue; | |
189 | } | |
8a0dc95f EVH |
190 | clnt->msize = option; |
191 | break; | |
192 | case Opt_trans: | |
4d63055f PK |
193 | s = match_strdup(&args[0]); |
194 | if (!s) { | |
195 | ret = -ENOMEM; | |
5d385153 JP |
196 | p9_debug(P9_DEBUG_ERROR, |
197 | "problem allocating copy of trans arg\n"); | |
4d63055f PK |
198 | goto free_and_return; |
199 | } | |
200 | clnt->trans_mod = v9fs_get_trans_by_name(s); | |
201 | if (clnt->trans_mod == NULL) { | |
5d385153 JP |
202 | pr_info("Could not find request transport: %s\n", |
203 | s); | |
349d3bb8 | 204 | ret = -EINVAL; |
4d63055f | 205 | kfree(s); |
349d3bb8 EVH |
206 | goto free_and_return; |
207 | } | |
4d63055f | 208 | kfree(s); |
8a0dc95f EVH |
209 | break; |
210 | case Opt_legacy: | |
342fee1d | 211 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 212 | break; |
0fb80abd | 213 | case Opt_version: |
4d63055f PK |
214 | s = match_strdup(&args[0]); |
215 | if (!s) { | |
216 | ret = -ENOMEM; | |
5d385153 JP |
217 | p9_debug(P9_DEBUG_ERROR, |
218 | "problem allocating copy of version arg\n"); | |
0fb80abd | 219 | goto free_and_return; |
4d63055f PK |
220 | } |
221 | ret = get_protocol_version(s); | |
222 | if (ret == -EINVAL) { | |
223 | kfree(s); | |
224 | goto free_and_return; | |
225 | } | |
226 | kfree(s); | |
0fb80abd SK |
227 | clnt->proto_version = ret; |
228 | break; | |
8a0dc95f EVH |
229 | default: |
230 | continue; | |
231 | } | |
232 | } | |
72029fe8 | 233 | |
349d3bb8 | 234 | free_and_return: |
d8c8a9e3 | 235 | kfree(tmp_options); |
bb8ffdfc | 236 | return ret; |
8a0dc95f EVH |
237 | } |
238 | ||
05a782d4 | 239 | static struct p9_fcall *p9_fcall_alloc(int alloc_msize) |
5387320d SD |
240 | { |
241 | struct p9_fcall *fc; | |
242 | fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS); | |
243 | if (!fc) | |
244 | return NULL; | |
245 | fc->capacity = alloc_msize; | |
246 | fc->sdata = (char *) fc + sizeof(struct p9_fcall); | |
247 | return fc; | |
248 | } | |
249 | ||
fea511a6 EVH |
250 | /** |
251 | * p9_tag_alloc - lookup/allocate a request by tag | |
252 | * @c: client session to lookup tag within | |
253 | * @tag: numeric id for transaction | |
254 | * | |
255 | * this is a simple array lookup, but will grow the | |
25985edc | 256 | * request_slots as necessary to accommodate transaction |
fea511a6 EVH |
257 | * ids which did not previously have a slot. |
258 | * | |
259 | * this code relies on the client spinlock to manage locks, its | |
260 | * possible we should switch to something else, but I'd rather | |
261 | * stick with something low-overhead for the common case. | |
262 | * | |
263 | */ | |
264 | ||
ef6b0807 DC |
265 | static struct p9_req_t * |
266 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) | |
fea511a6 EVH |
267 | { |
268 | unsigned long flags; | |
269 | int row, col; | |
51a87c55 | 270 | struct p9_req_t *req; |
abfa034e | 271 | int alloc_msize = min(c->msize, max_size); |
fea511a6 EVH |
272 | |
273 | /* This looks up the original request by tag so we know which | |
274 | * buffer to read the data into */ | |
275 | tag++; | |
276 | ||
277 | if (tag >= c->max_tag) { | |
278 | spin_lock_irqsave(&c->lock, flags); | |
279 | /* check again since original check was outside of lock */ | |
280 | while (tag >= c->max_tag) { | |
281 | row = (tag / P9_ROW_MAXTAG); | |
282 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
283 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
284 | ||
285 | if (!c->reqs[row]) { | |
5d385153 | 286 | pr_err("Couldn't grow tag array\n"); |
e45c5405 | 287 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 288 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
289 | } |
290 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
291 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 292 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
293 | } |
294 | c->max_tag += P9_ROW_MAXTAG; | |
295 | } | |
296 | spin_unlock_irqrestore(&c->lock, flags); | |
297 | } | |
298 | row = tag / P9_ROW_MAXTAG; | |
299 | col = tag % P9_ROW_MAXTAG; | |
300 | ||
51a87c55 | 301 | req = &c->reqs[row][col]; |
5387320d | 302 | if (!req->wq) { |
eeff66ef | 303 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
ea071aa1 SD |
304 | if (!req->wq) |
305 | goto grow_failed; | |
51a87c55 | 306 | init_waitqueue_head(req->wq); |
ea071aa1 | 307 | } |
ea071aa1 | 308 | |
5387320d SD |
309 | if (!req->tc) |
310 | req->tc = p9_fcall_alloc(alloc_msize); | |
311 | if (!req->rc) | |
312 | req->rc = p9_fcall_alloc(alloc_msize); | |
313 | if (!req->tc || !req->rc) | |
314 | goto grow_failed; | |
51a87c55 EVH |
315 | |
316 | p9pdu_reset(req->tc); | |
317 | p9pdu_reset(req->rc); | |
318 | ||
51a87c55 EVH |
319 | req->tc->tag = tag-1; |
320 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 | 321 | |
ea071aa1 SD |
322 | return req; |
323 | ||
324 | grow_failed: | |
325 | pr_err("Couldn't grow tag array\n"); | |
326 | kfree(req->tc); | |
327 | kfree(req->rc); | |
328 | kfree(req->wq); | |
329 | req->tc = req->rc = NULL; | |
330 | req->wq = NULL; | |
331 | return ERR_PTR(-ENOMEM); | |
fea511a6 | 332 | } |
fea511a6 EVH |
333 | |
334 | /** | |
335 | * p9_tag_lookup - lookup a request by tag | |
336 | * @c: client session to lookup tag within | |
337 | * @tag: numeric id for transaction | |
338 | * | |
339 | */ | |
340 | ||
341 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
342 | { | |
343 | int row, col; | |
344 | ||
345 | /* This looks up the original request by tag so we know which | |
346 | * buffer to read the data into */ | |
347 | tag++; | |
348 | ||
b85f7d92 EVH |
349 | if(tag >= c->max_tag) |
350 | return NULL; | |
fea511a6 EVH |
351 | |
352 | row = tag / P9_ROW_MAXTAG; | |
353 | col = tag % P9_ROW_MAXTAG; | |
354 | ||
355 | return &c->reqs[row][col]; | |
356 | } | |
357 | EXPORT_SYMBOL(p9_tag_lookup); | |
358 | ||
359 | /** | |
360 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 361 | * @c: v9fs client struct |
fea511a6 EVH |
362 | * |
363 | * This initializes the tags structure for each client instance. | |
364 | * | |
365 | */ | |
366 | ||
367 | static int p9_tag_init(struct p9_client *c) | |
368 | { | |
369 | int err = 0; | |
370 | ||
371 | c->tagpool = p9_idpool_create(); | |
372 | if (IS_ERR(c->tagpool)) { | |
373 | err = PTR_ERR(c->tagpool); | |
fea511a6 EVH |
374 | goto error; |
375 | } | |
fe1cbaba AK |
376 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
377 | if (err < 0) { | |
378 | p9_idpool_destroy(c->tagpool); | |
379 | goto error; | |
380 | } | |
fea511a6 EVH |
381 | c->max_tag = 0; |
382 | error: | |
383 | return err; | |
384 | } | |
385 | ||
386 | /** | |
387 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 388 | * @c: v9fs client struct |
fea511a6 EVH |
389 | * |
390 | * This frees resources associated with the tags structure | |
391 | * | |
392 | */ | |
393 | static void p9_tag_cleanup(struct p9_client *c) | |
394 | { | |
395 | int row, col; | |
396 | ||
397 | /* check to insure all requests are idle */ | |
398 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
399 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
400 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
5d385153 JP |
401 | p9_debug(P9_DEBUG_MUX, |
402 | "Attempting to cleanup non-free tag %d,%d\n", | |
403 | row, col); | |
fea511a6 EVH |
404 | /* TODO: delay execution of cleanup */ |
405 | return; | |
406 | } | |
407 | } | |
408 | } | |
409 | ||
62b2be59 LI |
410 | if (c->tagpool) { |
411 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 412 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 413 | } |
fea511a6 EVH |
414 | |
415 | /* free requests associated with tags */ | |
416 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 417 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 418 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
419 | kfree(c->reqs[row][col].tc); |
420 | kfree(c->reqs[row][col].rc); | |
421 | } | |
fea511a6 EVH |
422 | kfree(c->reqs[row]); |
423 | } | |
424 | c->max_tag = 0; | |
425 | } | |
426 | ||
673d62cd EVH |
427 | /** |
428 | * p9_free_req - free a request and clean-up as necessary | |
429 | * c: client state | |
430 | * r: request to release | |
431 | * | |
432 | */ | |
433 | ||
51a87c55 | 434 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 435 | { |
51a87c55 | 436 | int tag = r->tc->tag; |
5d385153 | 437 | p9_debug(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
51a87c55 | 438 | |
673d62cd | 439 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
440 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
441 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
442 | } |
443 | ||
91b8534f EVH |
444 | /** |
445 | * p9_client_cb - call back from transport to client | |
446 | * c: client state | |
447 | * req: request received | |
448 | * | |
449 | */ | |
2b6e72ed | 450 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status) |
91b8534f | 451 | { |
5d385153 | 452 | p9_debug(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
2b6e72ed DM |
453 | |
454 | /* | |
455 | * This barrier is needed to make sure any change made to req before | |
456 | * the other thread wakes up will indeed be seen by the waiting side. | |
457 | */ | |
458 | smp_wmb(); | |
459 | req->status = status; | |
460 | ||
1bab88b2 | 461 | wake_up(req->wq); |
5d385153 | 462 | p9_debug(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
91b8534f EVH |
463 | } |
464 | EXPORT_SYMBOL(p9_client_cb); | |
465 | ||
51a87c55 EVH |
466 | /** |
467 | * p9_parse_header - parse header arguments out of a packet | |
468 | * @pdu: packet to parse | |
469 | * @size: size of packet | |
470 | * @type: type of request | |
471 | * @tag: tag of packet | |
472 | * @rewind: set if we need to rewind offset afterwards | |
473 | */ | |
474 | ||
475 | int | |
476 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
477 | int rewind) | |
478 | { | |
479 | int8_t r_type; | |
480 | int16_t r_tag; | |
481 | int32_t r_size; | |
482 | int offset = pdu->offset; | |
483 | int err; | |
484 | ||
485 | pdu->offset = 0; | |
486 | if (pdu->size == 0) | |
487 | pdu->size = 7; | |
488 | ||
489 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
490 | if (err) | |
491 | goto rewind_and_exit; | |
492 | ||
493 | pdu->size = r_size; | |
494 | pdu->id = r_type; | |
495 | pdu->tag = r_tag; | |
496 | ||
5d385153 JP |
497 | p9_debug(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", |
498 | pdu->size, pdu->id, pdu->tag); | |
51a87c55 EVH |
499 | |
500 | if (type) | |
501 | *type = r_type; | |
502 | if (tag) | |
503 | *tag = r_tag; | |
504 | if (size) | |
505 | *size = r_size; | |
506 | ||
507 | ||
508 | rewind_and_exit: | |
509 | if (rewind) | |
510 | pdu->offset = offset; | |
511 | return err; | |
512 | } | |
513 | EXPORT_SYMBOL(p9_parse_header); | |
514 | ||
515 | /** | |
516 | * p9_check_errors - check 9p packet for error return and process it | |
517 | * @c: current client instance | |
518 | * @req: request to parse and check for error conditions | |
519 | * | |
520 | * returns error code if one is discovered, otherwise returns 0 | |
521 | * | |
522 | * this will have to be more complicated if we have multiple | |
523 | * error packet types | |
524 | */ | |
525 | ||
526 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
527 | { | |
528 | int8_t type; | |
529 | int err; | |
ca41bb3e | 530 | int ecode; |
51a87c55 EVH |
531 | |
532 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
533 | /* |
534 | * dump the response from server | |
535 | * This should be after check errors which poplulate pdu_fcall. | |
536 | */ | |
537 | trace_9p_protocol_dump(c, req->rc); | |
51a87c55 | 538 | if (err) { |
5d385153 | 539 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
51a87c55 EVH |
540 | return err; |
541 | } | |
ca41bb3e VJJ |
542 | if (type != P9_RERROR && type != P9_RLERROR) |
543 | return 0; | |
4f7ebe80 | 544 | |
ca41bb3e VJJ |
545 | if (!p9_is_proto_dotl(c)) { |
546 | char *ename; | |
ca41bb3e | 547 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e | 548 | &ename, &ecode); |
ca41bb3e VJJ |
549 | if (err) |
550 | goto out_err; | |
4f7ebe80 | 551 | |
287980e4 | 552 | if (p9_is_proto_dotu(c) && ecode < 512) |
ca41bb3e | 553 | err = -ecode; |
4f7ebe80 | 554 | |
287980e4 | 555 | if (!err) { |
ca41bb3e | 556 | err = p9_errstr2errno(ename, strlen(ename)); |
4f7ebe80 | 557 | |
5d385153 JP |
558 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
559 | -ecode, ename); | |
4f7ebe80 | 560 | } |
abfa034e | 561 | kfree(ename); |
ca41bb3e VJJ |
562 | } else { |
563 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
564 | err = -ecode; | |
565 | ||
5d385153 | 566 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
ca41bb3e | 567 | } |
51a87c55 | 568 | |
51a87c55 | 569 | return err; |
4f7ebe80 AB |
570 | |
571 | out_err: | |
5d385153 | 572 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
4f7ebe80 AB |
573 | |
574 | return err; | |
51a87c55 EVH |
575 | } |
576 | ||
abfa034e AK |
577 | /** |
578 | * p9_check_zc_errors - check 9p packet for error return and process it | |
579 | * @c: current client instance | |
580 | * @req: request to parse and check for error conditions | |
581 | * @in_hdrlen: Size of response protocol buffer. | |
582 | * | |
583 | * returns error code if one is discovered, otherwise returns 0 | |
584 | * | |
585 | * this will have to be more complicated if we have multiple | |
586 | * error packet types | |
587 | */ | |
588 | ||
589 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, | |
4f3b35c1 | 590 | struct iov_iter *uidata, int in_hdrlen) |
abfa034e AK |
591 | { |
592 | int err; | |
593 | int ecode; | |
594 | int8_t type; | |
595 | char *ename = NULL; | |
596 | ||
597 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
598 | /* |
599 | * dump the response from server | |
600 | * This should be after parse_header which poplulate pdu_fcall. | |
601 | */ | |
602 | trace_9p_protocol_dump(c, req->rc); | |
abfa034e | 603 | if (err) { |
5d385153 | 604 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
abfa034e AK |
605 | return err; |
606 | } | |
607 | ||
608 | if (type != P9_RERROR && type != P9_RLERROR) | |
609 | return 0; | |
610 | ||
611 | if (!p9_is_proto_dotl(c)) { | |
612 | /* Error is reported in string format */ | |
42fe6484 AK |
613 | int len; |
614 | /* 7 = header size for RERROR; */ | |
615 | int inline_len = in_hdrlen - 7; | |
abfa034e | 616 | |
42fe6484 AK |
617 | len = req->rc->size - req->rc->offset; |
618 | if (len > (P9_ZC_HDR_SZ - 7)) { | |
619 | err = -EFAULT; | |
abfa034e AK |
620 | goto out_err; |
621 | } | |
abfa034e | 622 | |
42fe6484 AK |
623 | ename = &req->rc->sdata[req->rc->offset]; |
624 | if (len > inline_len) { | |
625 | /* We have error in external buffer */ | |
1c512a7c AV |
626 | if (!copy_from_iter_full(ename + inline_len, |
627 | len - inline_len, uidata)) { | |
4f3b35c1 AV |
628 | err = -EFAULT; |
629 | goto out_err; | |
abfa034e AK |
630 | } |
631 | } | |
42fe6484 AK |
632 | ename = NULL; |
633 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", | |
634 | &ename, &ecode); | |
635 | if (err) | |
636 | goto out_err; | |
637 | ||
287980e4 | 638 | if (p9_is_proto_dotu(c) && ecode < 512) |
abfa034e | 639 | err = -ecode; |
42fe6484 | 640 | |
287980e4 | 641 | if (!err) { |
abfa034e AK |
642 | err = p9_errstr2errno(ename, strlen(ename)); |
643 | ||
5d385153 JP |
644 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
645 | -ecode, ename); | |
abfa034e AK |
646 | } |
647 | kfree(ename); | |
648 | } else { | |
649 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
650 | err = -ecode; | |
651 | ||
5d385153 | 652 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
abfa034e AK |
653 | } |
654 | return err; | |
655 | ||
abfa034e | 656 | out_err: |
5d385153 | 657 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
abfa034e AK |
658 | return err; |
659 | } | |
660 | ||
aca00763 RL |
661 | static struct p9_req_t * |
662 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
663 | ||
51a87c55 EVH |
664 | /** |
665 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
666 | * @c: client state |
667 | * @oldreq: request to cancel | |
51a87c55 | 668 | * |
aca00763 | 669 | * This sents a flush for a particular request and links |
51a87c55 EVH |
670 | * the flush request to the original request. The current |
671 | * code only supports a single flush request although the protocol | |
672 | * allows for multiple flush requests to be sent for a single request. | |
673 | * | |
674 | */ | |
675 | ||
676 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
677 | { | |
678 | struct p9_req_t *req; | |
679 | int16_t oldtag; | |
680 | int err; | |
681 | ||
682 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
683 | if (err) | |
684 | return err; | |
685 | ||
5d385153 | 686 | p9_debug(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
51a87c55 EVH |
687 | |
688 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
689 | if (IS_ERR(req)) | |
690 | return PTR_ERR(req); | |
691 | ||
1cff3306 SD |
692 | /* |
693 | * if we haven't received a response for oldreq, | |
60ff779c | 694 | * remove it from the list |
1cff3306 | 695 | */ |
0bfd6845 | 696 | if (oldreq->status == REQ_STATUS_SENT) |
afd8d654 SD |
697 | if (c->trans_mod->cancelled) |
698 | c->trans_mod->cancelled(c, oldreq); | |
1bab88b2 LI |
699 | |
700 | p9_free_req(c, req); | |
51a87c55 EVH |
701 | return 0; |
702 | } | |
703 | ||
abfa034e AK |
704 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
705 | int8_t type, int req_size, | |
706 | const char *fmt, va_list ap) | |
91b8534f | 707 | { |
51a87c55 | 708 | int tag, err; |
91b8534f | 709 | struct p9_req_t *req; |
91b8534f | 710 | |
5d385153 | 711 | p9_debug(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 712 | |
6d96d3ab AK |
713 | /* we allow for any status other than disconnected */ |
714 | if (c->status == Disconnected) | |
715 | return ERR_PTR(-EIO); | |
716 | ||
717 | /* if status is begin_disconnected we allow only clunk request */ | |
718 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 719 | return ERR_PTR(-EIO); |
91b8534f | 720 | |
91b8534f | 721 | tag = P9_NOTAG; |
51a87c55 | 722 | if (type != P9_TVERSION) { |
91b8534f EVH |
723 | tag = p9_idpool_get(c->tagpool); |
724 | if (tag < 0) | |
51a87c55 | 725 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
726 | } |
727 | ||
abfa034e | 728 | req = p9_tag_alloc(c, tag, req_size); |
51a87c55 EVH |
729 | if (IS_ERR(req)) |
730 | return req; | |
91b8534f | 731 | |
51a87c55 EVH |
732 | /* marshall the data */ |
733 | p9pdu_prepare(req->tc, tag, type); | |
342fee1d | 734 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe AK |
735 | if (err) |
736 | goto reterr; | |
348b5901 AK |
737 | p9pdu_finalize(c, req->tc); |
738 | trace_9p_client_req(c, type, tag); | |
abfa034e AK |
739 | return req; |
740 | reterr: | |
741 | p9_free_req(c, req); | |
742 | return ERR_PTR(err); | |
743 | } | |
744 | ||
745 | /** | |
746 | * p9_client_rpc - issue a request and wait for a response | |
747 | * @c: client session | |
748 | * @type: type of request | |
749 | * @fmt: protocol format string (see protocol.c) | |
750 | * | |
751 | * Returns request structure (which client must free using p9_free_req) | |
752 | */ | |
753 | ||
754 | static struct p9_req_t * | |
755 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
756 | { | |
757 | va_list ap; | |
758 | int sigpending, err; | |
759 | unsigned long flags; | |
760 | struct p9_req_t *req; | |
761 | ||
762 | va_start(ap, fmt); | |
763 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); | |
764 | va_end(ap); | |
765 | if (IS_ERR(req)) | |
766 | return req; | |
767 | ||
768 | if (signal_pending(current)) { | |
769 | sigpending = 1; | |
770 | clear_thread_flag(TIF_SIGPENDING); | |
771 | } else | |
772 | sigpending = 0; | |
91b8534f EVH |
773 | |
774 | err = c->trans_mod->request(c, req); | |
775 | if (err < 0) { | |
3cd79678 | 776 | if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d | 777 | c->status = Disconnected; |
91b8534f EVH |
778 | goto reterr; |
779 | } | |
a314f274 | 780 | again: |
abfa034e | 781 | /* Wait for the response */ |
9523feac | 782 | err = wait_event_killable(*req->wq, req->status >= REQ_STATUS_RCVD); |
91b8534f | 783 | |
2b6e72ed DM |
784 | /* |
785 | * Make sure our req is coherent with regard to updates in other | |
786 | * threads - echoes to wmb() in the callback | |
787 | */ | |
788 | smp_rmb(); | |
789 | ||
a314f274 JG |
790 | if ((err == -ERESTARTSYS) && (c->status == Connected) |
791 | && (type == P9_TFLUSH)) { | |
792 | sigpending = 1; | |
793 | clear_thread_flag(TIF_SIGPENDING); | |
794 | goto again; | |
795 | } | |
796 | ||
91b8534f | 797 | if (req->status == REQ_STATUS_ERROR) { |
5d385153 | 798 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 799 | err = req->t_err; |
91b8534f | 800 | } |
1bab88b2 | 801 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
5d385153 | 802 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 803 | sigpending = 1; |
91b8534f EVH |
804 | clear_thread_flag(TIF_SIGPENDING); |
805 | ||
1bab88b2 LI |
806 | if (c->trans_mod->cancel(c, req)) |
807 | p9_client_flush(c, req); | |
808 | ||
809 | /* if we received the response anyway, don't signal error */ | |
810 | if (req->status == REQ_STATUS_RCVD) | |
811 | err = 0; | |
91b8534f | 812 | } |
91b8534f EVH |
813 | if (sigpending) { |
814 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
815 | recalc_sigpending(); | |
816 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
817 | } | |
91b8534f EVH |
818 | if (err < 0) |
819 | goto reterr; | |
820 | ||
51a87c55 | 821 | err = p9_check_errors(c, req); |
348b5901 AK |
822 | trace_9p_client_res(c, type, req->rc->tag, err); |
823 | if (!err) | |
51a87c55 | 824 | return req; |
abfa034e | 825 | reterr: |
abfa034e | 826 | p9_free_req(c, req); |
43def35c | 827 | return ERR_PTR(safe_errno(err)); |
abfa034e AK |
828 | } |
829 | ||
830 | /** | |
831 | * p9_client_zc_rpc - issue a request and wait for a response | |
832 | * @c: client session | |
833 | * @type: type of request | |
4f3b35c1 AV |
834 | * @uidata: destination for zero copy read |
835 | * @uodata: source for zero copy write | |
abfa034e AK |
836 | * @inlen: read buffer size |
837 | * @olen: write buffer size | |
838 | * @hdrlen: reader header size, This is the size of response protocol data | |
839 | * @fmt: protocol format string (see protocol.c) | |
840 | * | |
841 | * Returns request structure (which client must free using p9_free_req) | |
842 | */ | |
843 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, | |
4f3b35c1 AV |
844 | struct iov_iter *uidata, |
845 | struct iov_iter *uodata, | |
abfa034e | 846 | int inlen, int olen, int in_hdrlen, |
4f3b35c1 | 847 | const char *fmt, ...) |
abfa034e AK |
848 | { |
849 | va_list ap; | |
850 | int sigpending, err; | |
851 | unsigned long flags; | |
852 | struct p9_req_t *req; | |
853 | ||
854 | va_start(ap, fmt); | |
855 | /* | |
856 | * We allocate a inline protocol data of only 4k bytes. | |
857 | * The actual content is passed in zero-copy fashion. | |
858 | */ | |
859 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); | |
860 | va_end(ap); | |
861 | if (IS_ERR(req)) | |
862 | return req; | |
863 | ||
864 | if (signal_pending(current)) { | |
865 | sigpending = 1; | |
866 | clear_thread_flag(TIF_SIGPENDING); | |
867 | } else | |
868 | sigpending = 0; | |
869 | ||
abfa034e | 870 | err = c->trans_mod->zc_request(c, req, uidata, uodata, |
4f3b35c1 | 871 | inlen, olen, in_hdrlen); |
abfa034e AK |
872 | if (err < 0) { |
873 | if (err == -EIO) | |
874 | c->status = Disconnected; | |
a84b69cb AV |
875 | if (err != -ERESTARTSYS) |
876 | goto reterr; | |
abfa034e AK |
877 | } |
878 | if (req->status == REQ_STATUS_ERROR) { | |
5d385153 | 879 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
abfa034e AK |
880 | err = req->t_err; |
881 | } | |
882 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
5d385153 | 883 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
abfa034e AK |
884 | sigpending = 1; |
885 | clear_thread_flag(TIF_SIGPENDING); | |
91b8534f | 886 | |
abfa034e AK |
887 | if (c->trans_mod->cancel(c, req)) |
888 | p9_client_flush(c, req); | |
889 | ||
890 | /* if we received the response anyway, don't signal error */ | |
891 | if (req->status == REQ_STATUS_RCVD) | |
892 | err = 0; | |
893 | } | |
894 | if (sigpending) { | |
895 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
896 | recalc_sigpending(); | |
897 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
898 | } | |
899 | if (err < 0) | |
900 | goto reterr; | |
901 | ||
4f3b35c1 | 902 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen); |
348b5901 AK |
903 | trace_9p_client_res(c, type, req->rc->tag, err); |
904 | if (!err) | |
abfa034e | 905 | return req; |
91b8534f EVH |
906 | reterr: |
907 | p9_free_req(c, req); | |
43def35c | 908 | return ERR_PTR(safe_errno(err)); |
91b8534f EVH |
909 | } |
910 | ||
5503ac56 EVH |
911 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
912 | { | |
9f3e9bbe | 913 | int ret; |
5503ac56 | 914 | struct p9_fid *fid; |
cac23d65 | 915 | unsigned long flags; |
5503ac56 | 916 | |
5d385153 | 917 | p9_debug(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
918 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
919 | if (!fid) | |
920 | return ERR_PTR(-ENOMEM); | |
921 | ||
9f3e9bbe | 922 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 923 | if (ret < 0) { |
9f3e9bbe | 924 | ret = -ENOSPC; |
5503ac56 EVH |
925 | goto error; |
926 | } | |
9f3e9bbe | 927 | fid->fid = ret; |
5503ac56 EVH |
928 | |
929 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
930 | fid->mode = -1; | |
f8b9d53a | 931 | fid->uid = current_fsuid(); |
5503ac56 | 932 | fid->clnt = clnt; |
3e2796a9 | 933 | fid->rdir = NULL; |
cac23d65 | 934 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 935 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 936 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
937 | |
938 | return fid; | |
939 | ||
940 | error: | |
941 | kfree(fid); | |
9f3e9bbe | 942 | return ERR_PTR(ret); |
5503ac56 EVH |
943 | } |
944 | ||
945 | static void p9_fid_destroy(struct p9_fid *fid) | |
946 | { | |
947 | struct p9_client *clnt; | |
cac23d65 | 948 | unsigned long flags; |
5503ac56 | 949 | |
5d385153 | 950 | p9_debug(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
951 | clnt = fid->clnt; |
952 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 953 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 954 | list_del(&fid->flist); |
cac23d65 | 955 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 956 | kfree(fid->rdir); |
5503ac56 EVH |
957 | kfree(fid); |
958 | } | |
8a0dc95f | 959 | |
32a875ad | 960 | static int p9_client_version(struct p9_client *c) |
bd238fb4 | 961 | { |
6936bf60 | 962 | int err = 0; |
51a87c55 | 963 | struct p9_req_t *req; |
212cd99c | 964 | char *version = NULL; |
51a87c55 | 965 | int msize; |
bd238fb4 | 966 | |
5d385153 JP |
967 | p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
968 | c->msize, c->proto_version); | |
c5a7697d SK |
969 | |
970 | switch (c->proto_version) { | |
45bc21ed | 971 | case p9_proto_2000L: |
c5a7697d | 972 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 973 | c->msize, "9P2000.L"); |
c5a7697d SK |
974 | break; |
975 | case p9_proto_2000u: | |
976 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
977 | c->msize, "9P2000.u"); | |
978 | break; | |
979 | case p9_proto_legacy: | |
980 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
981 | c->msize, "9P2000"); | |
982 | break; | |
983 | default: | |
984 | return -EINVAL; | |
c5a7697d SK |
985 | } |
986 | ||
51a87c55 EVH |
987 | if (IS_ERR(req)) |
988 | return PTR_ERR(req); | |
6936bf60 | 989 | |
342fee1d | 990 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 | 991 | if (err) { |
5d385153 | 992 | p9_debug(P9_DEBUG_9P, "version error %d\n", err); |
348b5901 | 993 | trace_9p_protocol_dump(c, req->rc); |
6936bf60 | 994 | goto error; |
51a87c55 | 995 | } |
6936bf60 | 996 | |
5d385153 | 997 | p9_debug(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
998 | if (!strncmp(version, "9P2000.L", 8)) |
999 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 1000 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
1001 | c->proto_version = p9_proto_2000u; |
1002 | else if (!strncmp(version, "9P2000", 6)) | |
1003 | c->proto_version = p9_proto_legacy; | |
6936bf60 | 1004 | else { |
6bd03a88 DM |
1005 | p9_debug(P9_DEBUG_ERROR, |
1006 | "server returned an unknown version: %s\n", version); | |
6936bf60 EVH |
1007 | err = -EREMOTEIO; |
1008 | goto error; | |
1009 | } | |
1010 | ||
6bd03a88 DM |
1011 | if (msize < 4096) { |
1012 | p9_debug(P9_DEBUG_ERROR, | |
1013 | "server returned a msize < 4096: %d\n", msize); | |
1014 | err = -EREMOTEIO; | |
1015 | goto error; | |
1016 | } | |
51a87c55 EVH |
1017 | if (msize < c->msize) |
1018 | c->msize = msize; | |
6936bf60 EVH |
1019 | |
1020 | error: | |
51a87c55 EVH |
1021 | kfree(version); |
1022 | p9_free_req(c, req); | |
6936bf60 EVH |
1023 | |
1024 | return err; | |
1025 | } | |
6936bf60 EVH |
1026 | |
1027 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
1028 | { | |
1029 | int err; | |
1030 | struct p9_client *clnt; | |
50192abe | 1031 | char *client_id; |
6936bf60 EVH |
1032 | |
1033 | err = 0; | |
bd238fb4 LI |
1034 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
1035 | if (!clnt) | |
1036 | return ERR_PTR(-ENOMEM); | |
1037 | ||
72029fe8 | 1038 | clnt->trans_mod = NULL; |
bb8ffdfc | 1039 | clnt->trans = NULL; |
50192abe WD |
1040 | |
1041 | client_id = utsname()->nodename; | |
1042 | memcpy(clnt->name, client_id, strlen(client_id) + 1); | |
1043 | ||
bd238fb4 | 1044 | spin_lock_init(&clnt->lock); |
bd238fb4 | 1045 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 1046 | |
fe1cbaba AK |
1047 | err = p9_tag_init(clnt); |
1048 | if (err < 0) | |
1049 | goto free_client; | |
fea511a6 | 1050 | |
bb8ffdfc EVH |
1051 | err = parse_opts(options, clnt); |
1052 | if (err < 0) | |
fe1cbaba | 1053 | goto destroy_tagpool; |
bb8ffdfc | 1054 | |
a17d1720 AK |
1055 | if (!clnt->trans_mod) |
1056 | clnt->trans_mod = v9fs_get_default_trans(); | |
1057 | ||
8a0dc95f EVH |
1058 | if (clnt->trans_mod == NULL) { |
1059 | err = -EPROTONOSUPPORT; | |
5d385153 JP |
1060 | p9_debug(P9_DEBUG_ERROR, |
1061 | "No transport defined or default transport\n"); | |
fe1cbaba | 1062 | goto destroy_tagpool; |
8781ff94 EVH |
1063 | } |
1064 | ||
1065 | clnt->fidpool = p9_idpool_create(); | |
1066 | if (IS_ERR(clnt->fidpool)) { | |
1067 | err = PTR_ERR(clnt->fidpool); | |
8781ff94 | 1068 | goto put_trans; |
8a0dc95f EVH |
1069 | } |
1070 | ||
5d385153 JP |
1071 | p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
1072 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 1073 | |
8b81ef58 EVH |
1074 | err = clnt->trans_mod->create(clnt, dev_name, options); |
1075 | if (err) | |
8781ff94 | 1076 | goto destroy_fidpool; |
bd238fb4 | 1077 | |
c9ffb05c VJJ |
1078 | if (clnt->msize > clnt->trans_mod->maxsize) |
1079 | clnt->msize = clnt->trans_mod->maxsize; | |
8a0dc95f | 1080 | |
6bd03a88 DM |
1081 | if (clnt->msize < 4096) { |
1082 | p9_debug(P9_DEBUG_ERROR, | |
1083 | "Please specify a msize of at least 4k\n"); | |
1084 | err = -EINVAL; | |
bd2135e7 | 1085 | goto close_trans; |
6bd03a88 DM |
1086 | } |
1087 | ||
6936bf60 | 1088 | err = p9_client_version(clnt); |
bd238fb4 | 1089 | if (err) |
8781ff94 | 1090 | goto close_trans; |
bd238fb4 | 1091 | |
bd238fb4 LI |
1092 | return clnt; |
1093 | ||
8781ff94 EVH |
1094 | close_trans: |
1095 | clnt->trans_mod->close(clnt); | |
1096 | destroy_fidpool: | |
1097 | p9_idpool_destroy(clnt->fidpool); | |
1098 | put_trans: | |
1099 | v9fs_put_trans(clnt->trans_mod); | |
fe1cbaba AK |
1100 | destroy_tagpool: |
1101 | p9_idpool_destroy(clnt->tagpool); | |
8781ff94 EVH |
1102 | free_client: |
1103 | kfree(clnt); | |
bd238fb4 LI |
1104 | return ERR_PTR(err); |
1105 | } | |
1106 | EXPORT_SYMBOL(p9_client_create); | |
1107 | ||
1108 | void p9_client_destroy(struct p9_client *clnt) | |
1109 | { | |
1110 | struct p9_fid *fid, *fidptr; | |
1111 | ||
5d385153 | 1112 | p9_debug(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 1113 | |
8b81ef58 EVH |
1114 | if (clnt->trans_mod) |
1115 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 1116 | |
72029fe8 TH |
1117 | v9fs_put_trans(clnt->trans_mod); |
1118 | ||
6d96d3ab | 1119 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
5d385153 | 1120 | pr_info("Found fid %d not clunked\n", fid->fid); |
bd238fb4 | 1121 | p9_fid_destroy(fid); |
6d96d3ab | 1122 | } |
bd238fb4 | 1123 | |
0af8887e EVH |
1124 | if (clnt->fidpool) |
1125 | p9_idpool_destroy(clnt->fidpool); | |
1126 | ||
fea511a6 EVH |
1127 | p9_tag_cleanup(clnt); |
1128 | ||
bd238fb4 LI |
1129 | kfree(clnt); |
1130 | } | |
1131 | EXPORT_SYMBOL(p9_client_destroy); | |
1132 | ||
1133 | void p9_client_disconnect(struct p9_client *clnt) | |
1134 | { | |
5d385153 | 1135 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
8b81ef58 | 1136 | clnt->status = Disconnected; |
bd238fb4 LI |
1137 | } |
1138 | EXPORT_SYMBOL(p9_client_disconnect); | |
1139 | ||
6d96d3ab AK |
1140 | void p9_client_begin_disconnect(struct p9_client *clnt) |
1141 | { | |
5d385153 | 1142 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
6d96d3ab AK |
1143 | clnt->status = BeginDisconnect; |
1144 | } | |
1145 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
1146 | ||
bd238fb4 | 1147 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
7880b43b | 1148 | const char *uname, kuid_t n_uname, const char *aname) |
bd238fb4 | 1149 | { |
348b5901 | 1150 | int err = 0; |
51a87c55 | 1151 | struct p9_req_t *req; |
bd238fb4 | 1152 | struct p9_fid *fid; |
51a87c55 | 1153 | struct p9_qid qid; |
bd238fb4 | 1154 | |
bd238fb4 | 1155 | |
5d385153 JP |
1156 | p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
1157 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 LI |
1158 | fid = p9_fid_create(clnt); |
1159 | if (IS_ERR(fid)) { | |
1160 | err = PTR_ERR(fid); | |
1161 | fid = NULL; | |
1162 | goto error; | |
1163 | } | |
21c9f5cc | 1164 | fid->uid = n_uname; |
bd238fb4 | 1165 | |
f791f7c5 | 1166 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, |
51a87c55 EVH |
1167 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
1168 | if (IS_ERR(req)) { | |
1169 | err = PTR_ERR(req); | |
bd238fb4 LI |
1170 | goto error; |
1171 | } | |
1172 | ||
342fee1d | 1173 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 1174 | if (err) { |
348b5901 | 1175 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1176 | p9_free_req(clnt, req); |
bd238fb4 | 1177 | goto error; |
51a87c55 | 1178 | } |
bd238fb4 | 1179 | |
5d385153 JP |
1180 | p9_debug(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
1181 | qid.type, (unsigned long long)qid.path, qid.version); | |
51a87c55 EVH |
1182 | |
1183 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
1184 | ||
1185 | p9_free_req(clnt, req); | |
bd238fb4 LI |
1186 | return fid; |
1187 | ||
1188 | error: | |
bd238fb4 LI |
1189 | if (fid) |
1190 | p9_fid_destroy(fid); | |
1191 | return ERR_PTR(err); | |
1192 | } | |
1193 | EXPORT_SYMBOL(p9_client_attach); | |
1194 | ||
b76225e2 | 1195 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
7880b43b | 1196 | const unsigned char * const *wnames, int clone) |
bd238fb4 LI |
1197 | { |
1198 | int err; | |
bd238fb4 LI |
1199 | struct p9_client *clnt; |
1200 | struct p9_fid *fid; | |
51a87c55 EVH |
1201 | struct p9_qid *wqids; |
1202 | struct p9_req_t *req; | |
b76225e2 | 1203 | uint16_t nwqids, count; |
bd238fb4 | 1204 | |
bd238fb4 | 1205 | err = 0; |
62b2be59 | 1206 | wqids = NULL; |
bd238fb4 LI |
1207 | clnt = oldfid->clnt; |
1208 | if (clone) { | |
1209 | fid = p9_fid_create(clnt); | |
1210 | if (IS_ERR(fid)) { | |
1211 | err = PTR_ERR(fid); | |
1212 | fid = NULL; | |
1213 | goto error; | |
1214 | } | |
1215 | ||
1216 | fid->uid = oldfid->uid; | |
1217 | } else | |
1218 | fid = oldfid; | |
1219 | ||
51a87c55 | 1220 | |
5d385153 JP |
1221 | p9_debug(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
1222 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
51a87c55 EVH |
1223 | |
1224 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
1225 | nwname, wnames); | |
1226 | if (IS_ERR(req)) { | |
1227 | err = PTR_ERR(req); | |
bd238fb4 LI |
1228 | goto error; |
1229 | } | |
1230 | ||
342fee1d | 1231 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 | 1232 | if (err) { |
348b5901 | 1233 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 | 1234 | p9_free_req(clnt, req); |
51a87c55 | 1235 | goto clunk_fid; |
e7f4b8f1 EVH |
1236 | } |
1237 | p9_free_req(clnt, req); | |
bd238fb4 | 1238 | |
5d385153 | 1239 | p9_debug(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
51a87c55 EVH |
1240 | |
1241 | if (nwqids != nwname) { | |
bd238fb4 LI |
1242 | err = -ENOENT; |
1243 | goto clunk_fid; | |
1244 | } | |
1245 | ||
51a87c55 | 1246 | for (count = 0; count < nwqids; count++) |
5d385153 | 1247 | p9_debug(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
b0d5fdef RD |
1248 | count, wqids[count].type, |
1249 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
1250 | wqids[count].version); |
1251 | ||
bd238fb4 | 1252 | if (nwname) |
51a87c55 | 1253 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
1254 | else |
1255 | fid->qid = oldfid->qid; | |
1256 | ||
62b2be59 | 1257 | kfree(wqids); |
bd238fb4 LI |
1258 | return fid; |
1259 | ||
1260 | clunk_fid: | |
62b2be59 | 1261 | kfree(wqids); |
51a87c55 EVH |
1262 | p9_client_clunk(fid); |
1263 | fid = NULL; | |
bd238fb4 LI |
1264 | |
1265 | error: | |
bd238fb4 LI |
1266 | if (fid && (fid != oldfid)) |
1267 | p9_fid_destroy(fid); | |
1268 | ||
1269 | return ERR_PTR(err); | |
1270 | } | |
1271 | EXPORT_SYMBOL(p9_client_walk); | |
1272 | ||
1273 | int p9_client_open(struct p9_fid *fid, int mode) | |
1274 | { | |
1275 | int err; | |
bd238fb4 | 1276 | struct p9_client *clnt; |
51a87c55 EVH |
1277 | struct p9_req_t *req; |
1278 | struct p9_qid qid; | |
1279 | int iounit; | |
bd238fb4 | 1280 | |
bd238fb4 | 1281 | clnt = fid->clnt; |
5d385153 | 1282 | p9_debug(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
ef56547e MK |
1283 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
1284 | err = 0; | |
bd238fb4 LI |
1285 | |
1286 | if (fid->mode != -1) | |
1287 | return -EINVAL; | |
1288 | ||
ef56547e MK |
1289 | if (p9_is_proto_dotl(clnt)) |
1290 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1291 | else | |
1292 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1293 | if (IS_ERR(req)) { |
1294 | err = PTR_ERR(req); | |
1295 | goto error; | |
bd238fb4 LI |
1296 | } |
1297 | ||
342fee1d | 1298 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1299 | if (err) { |
348b5901 | 1300 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1301 | goto free_and_error; |
1302 | } | |
51a87c55 | 1303 | |
5d385153 | 1304 | p9_debug(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
ef56547e MK |
1305 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
1306 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1307 | |
1308 | fid->mode = mode; | |
51a87c55 | 1309 | fid->iounit = iounit; |
bd238fb4 | 1310 | |
e7f4b8f1 EVH |
1311 | free_and_error: |
1312 | p9_free_req(clnt, req); | |
51a87c55 | 1313 | error: |
bd238fb4 LI |
1314 | return err; |
1315 | } | |
1316 | EXPORT_SYMBOL(p9_client_open); | |
1317 | ||
7880b43b | 1318 | int p9_client_create_dotl(struct p9_fid *ofid, const char *name, u32 flags, u32 mode, |
f791f7c5 | 1319 | kgid_t gid, struct p9_qid *qid) |
5643135a VJJ |
1320 | { |
1321 | int err = 0; | |
1322 | struct p9_client *clnt; | |
1323 | struct p9_req_t *req; | |
1324 | int iounit; | |
1325 | ||
5d385153 | 1326 | p9_debug(P9_DEBUG_9P, |
5643135a | 1327 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
f791f7c5 EB |
1328 | ofid->fid, name, flags, mode, |
1329 | from_kgid(&init_user_ns, gid)); | |
5643135a VJJ |
1330 | clnt = ofid->clnt; |
1331 | ||
1332 | if (ofid->mode != -1) | |
1333 | return -EINVAL; | |
1334 | ||
f791f7c5 | 1335 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, |
5643135a VJJ |
1336 | mode, gid); |
1337 | if (IS_ERR(req)) { | |
1338 | err = PTR_ERR(req); | |
1339 | goto error; | |
1340 | } | |
1341 | ||
1342 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1343 | if (err) { | |
348b5901 | 1344 | trace_9p_protocol_dump(clnt, req->rc); |
5643135a VJJ |
1345 | goto free_and_error; |
1346 | } | |
1347 | ||
5d385153 | 1348 | p9_debug(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
5643135a VJJ |
1349 | qid->type, |
1350 | (unsigned long long)qid->path, | |
1351 | qid->version, iounit); | |
1352 | ||
1353 | ofid->mode = mode; | |
1354 | ofid->iounit = iounit; | |
1355 | ||
1356 | free_and_error: | |
1357 | p9_free_req(clnt, req); | |
1358 | error: | |
1359 | return err; | |
1360 | } | |
1361 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1362 | ||
7880b43b | 1363 | int p9_client_fcreate(struct p9_fid *fid, const char *name, u32 perm, int mode, |
bd238fb4 LI |
1364 | char *extension) |
1365 | { | |
1366 | int err; | |
bd238fb4 | 1367 | struct p9_client *clnt; |
51a87c55 EVH |
1368 | struct p9_req_t *req; |
1369 | struct p9_qid qid; | |
1370 | int iounit; | |
bd238fb4 | 1371 | |
5d385153 | 1372 | p9_debug(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
51a87c55 | 1373 | fid->fid, name, perm, mode); |
bd238fb4 | 1374 | err = 0; |
bd238fb4 LI |
1375 | clnt = fid->clnt; |
1376 | ||
1377 | if (fid->mode != -1) | |
1378 | return -EINVAL; | |
1379 | ||
51a87c55 EVH |
1380 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1381 | mode, extension); | |
1382 | if (IS_ERR(req)) { | |
1383 | err = PTR_ERR(req); | |
1384 | goto error; | |
bd238fb4 LI |
1385 | } |
1386 | ||
342fee1d | 1387 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1388 | if (err) { |
348b5901 | 1389 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1390 | goto free_and_error; |
1391 | } | |
51a87c55 | 1392 | |
5d385153 | 1393 | p9_debug(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
b0d5fdef RD |
1394 | qid.type, |
1395 | (unsigned long long)qid.path, | |
1396 | qid.version, iounit); | |
bd238fb4 LI |
1397 | |
1398 | fid->mode = mode; | |
51a87c55 | 1399 | fid->iounit = iounit; |
bd238fb4 | 1400 | |
e7f4b8f1 EVH |
1401 | free_and_error: |
1402 | p9_free_req(clnt, req); | |
51a87c55 | 1403 | error: |
bd238fb4 LI |
1404 | return err; |
1405 | } | |
1406 | EXPORT_SYMBOL(p9_client_fcreate); | |
1407 | ||
7880b43b AV |
1408 | int p9_client_symlink(struct p9_fid *dfid, const char *name, |
1409 | const char *symtgt, kgid_t gid, struct p9_qid *qid) | |
50cc42ff VJJ |
1410 | { |
1411 | int err = 0; | |
1412 | struct p9_client *clnt; | |
1413 | struct p9_req_t *req; | |
1414 | ||
5d385153 | 1415 | p9_debug(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
50cc42ff VJJ |
1416 | dfid->fid, name, symtgt); |
1417 | clnt = dfid->clnt; | |
1418 | ||
f791f7c5 | 1419 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, |
50cc42ff VJJ |
1420 | gid); |
1421 | if (IS_ERR(req)) { | |
1422 | err = PTR_ERR(req); | |
1423 | goto error; | |
1424 | } | |
1425 | ||
1426 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1427 | if (err) { | |
348b5901 | 1428 | trace_9p_protocol_dump(clnt, req->rc); |
50cc42ff VJJ |
1429 | goto free_and_error; |
1430 | } | |
1431 | ||
5d385153 | 1432 | p9_debug(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
50cc42ff VJJ |
1433 | qid->type, (unsigned long long)qid->path, qid->version); |
1434 | ||
1435 | free_and_error: | |
1436 | p9_free_req(clnt, req); | |
1437 | error: | |
1438 | return err; | |
1439 | } | |
1440 | EXPORT_SYMBOL(p9_client_symlink); | |
1441 | ||
7880b43b | 1442 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, const char *newname) |
652df9a7 VJJ |
1443 | { |
1444 | struct p9_client *clnt; | |
1445 | struct p9_req_t *req; | |
1446 | ||
5d385153 | 1447 | p9_debug(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
652df9a7 VJJ |
1448 | dfid->fid, oldfid->fid, newname); |
1449 | clnt = dfid->clnt; | |
1450 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1451 | newname); | |
1452 | if (IS_ERR(req)) | |
1453 | return PTR_ERR(req); | |
1454 | ||
5d385153 | 1455 | p9_debug(P9_DEBUG_9P, "<<< RLINK\n"); |
652df9a7 VJJ |
1456 | p9_free_req(clnt, req); |
1457 | return 0; | |
1458 | } | |
1459 | EXPORT_SYMBOL(p9_client_link); | |
1460 | ||
b165d601 | 1461 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc VJJ |
1462 | { |
1463 | int err; | |
1464 | struct p9_client *clnt; | |
1465 | struct p9_req_t *req; | |
1466 | ||
5d385153 | 1467 | p9_debug(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
b165d601 | 1468 | fid->fid, datasync); |
920e65dc VJJ |
1469 | err = 0; |
1470 | clnt = fid->clnt; | |
1471 | ||
b165d601 | 1472 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc VJJ |
1473 | if (IS_ERR(req)) { |
1474 | err = PTR_ERR(req); | |
1475 | goto error; | |
1476 | } | |
1477 | ||
5d385153 | 1478 | p9_debug(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
920e65dc VJJ |
1479 | |
1480 | p9_free_req(clnt, req); | |
1481 | ||
1482 | error: | |
1483 | return err; | |
1484 | } | |
1485 | EXPORT_SYMBOL(p9_client_fsync); | |
1486 | ||
bd238fb4 LI |
1487 | int p9_client_clunk(struct p9_fid *fid) |
1488 | { | |
1489 | int err; | |
bd238fb4 | 1490 | struct p9_client *clnt; |
51a87c55 | 1491 | struct p9_req_t *req; |
208f3c28 | 1492 | int retries = 0; |
bd238fb4 | 1493 | |
8e44a080 | 1494 | if (!fid) { |
5d385153 JP |
1495 | pr_warn("%s (%d): Trying to clunk with NULL fid\n", |
1496 | __func__, task_pid_nr(current)); | |
8e44a080 | 1497 | dump_stack(); |
1498 | return 0; | |
1499 | } | |
1500 | ||
208f3c28 JG |
1501 | again: |
1502 | p9_debug(P9_DEBUG_9P, ">>> TCLUNK fid %d (try %d)\n", fid->fid, | |
1503 | retries); | |
bd238fb4 | 1504 | err = 0; |
bd238fb4 LI |
1505 | clnt = fid->clnt; |
1506 | ||
51a87c55 EVH |
1507 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1508 | if (IS_ERR(req)) { | |
1509 | err = PTR_ERR(req); | |
1510 | goto error; | |
bd238fb4 LI |
1511 | } |
1512 | ||
5d385153 | 1513 | p9_debug(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1514 | |
51a87c55 | 1515 | p9_free_req(clnt, req); |
51a87c55 | 1516 | error: |
5034990e AK |
1517 | /* |
1518 | * Fid is not valid even after a failed clunk | |
208f3c28 JG |
1519 | * If interrupted, retry once then give up and |
1520 | * leak fid until umount. | |
5034990e | 1521 | */ |
208f3c28 JG |
1522 | if (err == -ERESTARTSYS) { |
1523 | if (retries++ == 0) | |
1524 | goto again; | |
1525 | } else | |
1526 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1527 | return err; |
1528 | } | |
1529 | EXPORT_SYMBOL(p9_client_clunk); | |
1530 | ||
1531 | int p9_client_remove(struct p9_fid *fid) | |
1532 | { | |
1533 | int err; | |
bd238fb4 | 1534 | struct p9_client *clnt; |
51a87c55 | 1535 | struct p9_req_t *req; |
bd238fb4 | 1536 | |
5d385153 | 1537 | p9_debug(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1538 | err = 0; |
bd238fb4 LI |
1539 | clnt = fid->clnt; |
1540 | ||
51a87c55 EVH |
1541 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1542 | if (IS_ERR(req)) { | |
1543 | err = PTR_ERR(req); | |
1544 | goto error; | |
bd238fb4 LI |
1545 | } |
1546 | ||
5d385153 | 1547 | p9_debug(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1548 | |
51a87c55 | 1549 | p9_free_req(clnt, req); |
51a87c55 | 1550 | error: |
208f3c28 JG |
1551 | if (err == -ERESTARTSYS) |
1552 | p9_client_clunk(fid); | |
1553 | else | |
1554 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1555 | return err; |
1556 | } | |
1557 | EXPORT_SYMBOL(p9_client_remove); | |
1558 | ||
48e370ff AK |
1559 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
1560 | { | |
1561 | int err = 0; | |
1562 | struct p9_req_t *req; | |
1563 | struct p9_client *clnt; | |
1564 | ||
5d385153 | 1565 | p9_debug(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", |
48e370ff AK |
1566 | dfid->fid, name, flags); |
1567 | ||
1568 | clnt = dfid->clnt; | |
1569 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); | |
1570 | if (IS_ERR(req)) { | |
1571 | err = PTR_ERR(req); | |
1572 | goto error; | |
1573 | } | |
5d385153 | 1574 | p9_debug(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); |
48e370ff AK |
1575 | |
1576 | p9_free_req(clnt, req); | |
1577 | error: | |
1578 | return err; | |
1579 | } | |
1580 | EXPORT_SYMBOL(p9_client_unlinkat); | |
1581 | ||
0fc9655e | 1582 | int |
e1200fe6 | 1583 | p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) |
bd238fb4 | 1584 | { |
e1200fe6 | 1585 | struct p9_client *clnt = fid->clnt; |
abfa034e | 1586 | struct p9_req_t *req; |
e1200fe6 | 1587 | int total = 0; |
999b8b88 | 1588 | *err = 0; |
bd238fb4 | 1589 | |
5d385153 | 1590 | p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
e1200fe6 AV |
1591 | fid->fid, (unsigned long long) offset, (int)iov_iter_count(to)); |
1592 | ||
1593 | while (iov_iter_count(to)) { | |
1594 | int count = iov_iter_count(to); | |
1595 | int rsize, non_zc = 0; | |
1596 | char *dataptr; | |
1597 | ||
1598 | rsize = fid->iounit; | |
1599 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1600 | rsize = clnt->msize - P9_IOHDRSZ; | |
1601 | ||
1602 | if (count < rsize) | |
1603 | rsize = count; | |
1604 | ||
1605 | /* Don't bother zerocopy for small IO (< 1024) */ | |
1606 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1607 | /* | |
1608 | * response header len is 11 | |
1609 | * PDU Header(7) + IO Size (4) | |
1610 | */ | |
1611 | req = p9_client_zc_rpc(clnt, P9_TREAD, to, NULL, rsize, | |
1612 | 0, 11, "dqd", fid->fid, | |
1613 | offset, rsize); | |
1614 | } else { | |
1615 | non_zc = 1; | |
1616 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, | |
1617 | rsize); | |
1618 | } | |
1619 | if (IS_ERR(req)) { | |
1620 | *err = PTR_ERR(req); | |
1621 | break; | |
1622 | } | |
bd238fb4 | 1623 | |
e1200fe6 AV |
1624 | *err = p9pdu_readf(req->rc, clnt->proto_version, |
1625 | "D", &count, &dataptr); | |
1626 | if (*err) { | |
1627 | trace_9p_protocol_dump(clnt, req->rc); | |
1628 | p9_free_req(clnt, req); | |
1629 | break; | |
1630 | } | |
0f1db7de AV |
1631 | if (rsize < count) { |
1632 | pr_err("bogus RREAD count (%d > %d)\n", count, rsize); | |
1633 | count = rsize; | |
1634 | } | |
bd238fb4 | 1635 | |
e1200fe6 AV |
1636 | p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
1637 | if (!count) { | |
1638 | p9_free_req(clnt, req); | |
1639 | break; | |
1640 | } | |
bd238fb4 | 1641 | |
e1200fe6 AV |
1642 | if (non_zc) { |
1643 | int n = copy_to_iter(dataptr, count, to); | |
1644 | total += n; | |
1645 | offset += n; | |
1646 | if (n != count) { | |
1647 | *err = -EFAULT; | |
1648 | p9_free_req(clnt, req); | |
1649 | break; | |
1650 | } | |
1651 | } else { | |
1652 | iov_iter_advance(to, count); | |
1653 | total += count; | |
1654 | offset += count; | |
1655 | } | |
1656 | p9_free_req(clnt, req); | |
51a87c55 | 1657 | } |
e1200fe6 | 1658 | return total; |
bd238fb4 | 1659 | } |
0fc9655e | 1660 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1661 | |
1662 | int | |
070b3656 | 1663 | p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err) |
bd238fb4 | 1664 | { |
070b3656 | 1665 | struct p9_client *clnt = fid->clnt; |
51a87c55 | 1666 | struct p9_req_t *req; |
070b3656 | 1667 | int total = 0; |
999b8b88 | 1668 | *err = 0; |
070b3656 AV |
1669 | |
1670 | p9_debug(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %zd\n", | |
1671 | fid->fid, (unsigned long long) offset, | |
1672 | iov_iter_count(from)); | |
1673 | ||
1674 | while (iov_iter_count(from)) { | |
1675 | int count = iov_iter_count(from); | |
1676 | int rsize = fid->iounit; | |
1677 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1678 | rsize = clnt->msize - P9_IOHDRSZ; | |
1679 | ||
1680 | if (count < rsize) | |
1681 | rsize = count; | |
1682 | ||
1683 | /* Don't bother zerocopy for small IO (< 1024) */ | |
1684 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1685 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, from, 0, | |
1686 | rsize, P9_ZC_HDR_SZ, "dqd", | |
1687 | fid->fid, offset, rsize); | |
1688 | } else { | |
1689 | req = p9_client_rpc(clnt, P9_TWRITE, "dqV", fid->fid, | |
1690 | offset, rsize, from); | |
1691 | } | |
1692 | if (IS_ERR(req)) { | |
1693 | *err = PTR_ERR(req); | |
1694 | break; | |
1695 | } | |
bd238fb4 | 1696 | |
070b3656 AV |
1697 | *err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
1698 | if (*err) { | |
1699 | trace_9p_protocol_dump(clnt, req->rc); | |
1700 | p9_free_req(clnt, req); | |
67e808fb | 1701 | break; |
070b3656 | 1702 | } |
0f1db7de AV |
1703 | if (rsize < count) { |
1704 | pr_err("bogus RWRITE count (%d > %d)\n", count, rsize); | |
1705 | count = rsize; | |
1706 | } | |
1fc52481 | 1707 | |
070b3656 | 1708 | p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
0fc9655e | 1709 | |
070b3656 AV |
1710 | p9_free_req(clnt, req); |
1711 | iov_iter_advance(from, count); | |
1712 | total += count; | |
1713 | offset += count; | |
e7f4b8f1 | 1714 | } |
070b3656 | 1715 | return total; |
bd238fb4 | 1716 | } |
0fc9655e | 1717 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1718 | |
51a87c55 | 1719 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1720 | { |
51a87c55 EVH |
1721 | int err; |
1722 | struct p9_client *clnt; | |
1723 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1724 | struct p9_req_t *req; | |
1725 | u16 ignored; | |
5503ac56 | 1726 | |
5d385153 | 1727 | p9_debug(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1728 | |
5503ac56 EVH |
1729 | if (!ret) |
1730 | return ERR_PTR(-ENOMEM); | |
1731 | ||
bd238fb4 | 1732 | err = 0; |
bd238fb4 LI |
1733 | clnt = fid->clnt; |
1734 | ||
51a87c55 EVH |
1735 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1736 | if (IS_ERR(req)) { | |
1737 | err = PTR_ERR(req); | |
bd238fb4 LI |
1738 | goto error; |
1739 | } | |
1740 | ||
342fee1d | 1741 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1742 | if (err) { |
348b5901 | 1743 | trace_9p_protocol_dump(clnt, req->rc); |
eedfe1c4 AK |
1744 | p9_free_req(clnt, req); |
1745 | goto error; | |
e7f4b8f1 | 1746 | } |
bd238fb4 | 1747 | |
5d385153 | 1748 | p9_debug(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1749 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1750 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1751 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1752 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1753 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1754 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1755 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1756 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
447c5094 EB |
1757 | from_kuid(&init_user_ns, ret->n_uid), |
1758 | from_kgid(&init_user_ns, ret->n_gid), | |
1759 | from_kuid(&init_user_ns, ret->n_muid)); | |
bd238fb4 | 1760 | |
742b11a7 LI |
1761 | p9_free_req(clnt, req); |
1762 | return ret; | |
1763 | ||
bd238fb4 | 1764 | error: |
742b11a7 LI |
1765 | kfree(ret); |
1766 | return ERR_PTR(err); | |
bd238fb4 LI |
1767 | } |
1768 | EXPORT_SYMBOL(p9_client_stat); | |
1769 | ||
f0853122 SK |
1770 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1771 | u64 request_mask) | |
1772 | { | |
1773 | int err; | |
1774 | struct p9_client *clnt; | |
1775 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1776 | GFP_KERNEL); | |
1777 | struct p9_req_t *req; | |
1778 | ||
5d385153 | 1779 | p9_debug(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
f0853122 SK |
1780 | fid->fid, request_mask); |
1781 | ||
1782 | if (!ret) | |
1783 | return ERR_PTR(-ENOMEM); | |
1784 | ||
1785 | err = 0; | |
1786 | clnt = fid->clnt; | |
1787 | ||
1788 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1789 | if (IS_ERR(req)) { | |
1790 | err = PTR_ERR(req); | |
1791 | goto error; | |
1792 | } | |
1793 | ||
1794 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1795 | if (err) { | |
348b5901 | 1796 | trace_9p_protocol_dump(clnt, req->rc); |
f0853122 SK |
1797 | p9_free_req(clnt, req); |
1798 | goto error; | |
1799 | } | |
1800 | ||
5d385153 | 1801 | p9_debug(P9_DEBUG_9P, |
f0853122 SK |
1802 | "<<< RGETATTR st_result_mask=%lld\n" |
1803 | "<<< qid=%x.%llx.%x\n" | |
1804 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1805 | "<<< st_uid=%d st_gid=%d\n" | |
1806 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1807 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1808 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1809 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1810 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1811 | "<<< st_gen=%lld st_data_version=%lld", | |
1812 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
447c5094 EB |
1813 | ret->qid.version, ret->st_mode, ret->st_nlink, |
1814 | from_kuid(&init_user_ns, ret->st_uid), | |
1815 | from_kgid(&init_user_ns, ret->st_gid), | |
1816 | ret->st_rdev, ret->st_size, ret->st_blksize, | |
f0853122 SK |
1817 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
1818 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1819 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1820 | ret->st_gen, ret->st_data_version); | |
1821 | ||
1822 | p9_free_req(clnt, req); | |
1823 | return ret; | |
1824 | ||
1825 | error: | |
1826 | kfree(ret); | |
1827 | return ERR_PTR(err); | |
1828 | } | |
1829 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1830 | ||
342fee1d | 1831 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1832 | { |
1833 | int ret; | |
1834 | ||
9d6939da | 1835 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1836 | /* size[2] type[2] dev[4] qid[13] */ |
1837 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1838 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1839 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1840 | |
1841 | if (wst->name) | |
1842 | ret += strlen(wst->name); | |
1843 | if (wst->uid) | |
1844 | ret += strlen(wst->uid); | |
1845 | if (wst->gid) | |
1846 | ret += strlen(wst->gid); | |
1847 | if (wst->muid) | |
1848 | ret += strlen(wst->muid); | |
1849 | ||
c56e4acf SK |
1850 | if ((proto_version == p9_proto_2000u) || |
1851 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1852 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1853 | if (wst->extension) | |
1854 | ret += strlen(wst->extension); | |
1855 | } | |
1856 | ||
1857 | return ret; | |
1858 | } | |
1859 | ||
bd238fb4 LI |
1860 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1861 | { | |
1862 | int err; | |
51a87c55 | 1863 | struct p9_req_t *req; |
bd238fb4 LI |
1864 | struct p9_client *clnt; |
1865 | ||
453ed90d LI |
1866 | err = 0; |
1867 | clnt = fid->clnt; | |
342fee1d | 1868 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
5d385153 JP |
1869 | p9_debug(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
1870 | p9_debug(P9_DEBUG_9P, | |
e7f4b8f1 EVH |
1871 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1872 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1873 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1874 | " uid=%d gid=%d n_muid=%d\n", | |
1875 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1876 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1877 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1878 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
447c5094 EB |
1879 | from_kuid(&init_user_ns, wst->n_uid), |
1880 | from_kgid(&init_user_ns, wst->n_gid), | |
1881 | from_kuid(&init_user_ns, wst->n_muid)); | |
bd238fb4 | 1882 | |
9d6939da | 1883 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1884 | if (IS_ERR(req)) { |
1885 | err = PTR_ERR(req); | |
1886 | goto error; | |
bd238fb4 LI |
1887 | } |
1888 | ||
5d385153 | 1889 | p9_debug(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1890 | |
51a87c55 EVH |
1891 | p9_free_req(clnt, req); |
1892 | error: | |
bd238fb4 LI |
1893 | return err; |
1894 | } | |
1895 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1896 | |
87d7845a SK |
1897 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1898 | { | |
1899 | int err; | |
1900 | struct p9_req_t *req; | |
1901 | struct p9_client *clnt; | |
1902 | ||
1903 | err = 0; | |
1904 | clnt = fid->clnt; | |
5d385153 JP |
1905 | p9_debug(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
1906 | p9_debug(P9_DEBUG_9P, | |
87d7845a SK |
1907 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
1908 | " atime_sec=%lld atime_nsec=%lld\n" | |
1909 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
447c5094 EB |
1910 | p9attr->valid, p9attr->mode, |
1911 | from_kuid(&init_user_ns, p9attr->uid), | |
1912 | from_kgid(&init_user_ns, p9attr->gid), | |
87d7845a SK |
1913 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
1914 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1915 | ||
1916 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1917 | ||
1918 | if (IS_ERR(req)) { | |
1919 | err = PTR_ERR(req); | |
1920 | goto error; | |
1921 | } | |
5d385153 | 1922 | p9_debug(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
87d7845a SK |
1923 | p9_free_req(clnt, req); |
1924 | error: | |
1925 | return err; | |
1926 | } | |
1927 | EXPORT_SYMBOL(p9_client_setattr); | |
1928 | ||
bda8e775 SK |
1929 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1930 | { | |
1931 | int err; | |
1932 | struct p9_req_t *req; | |
1933 | struct p9_client *clnt; | |
1934 | ||
1935 | err = 0; | |
1936 | clnt = fid->clnt; | |
1937 | ||
5d385153 | 1938 | p9_debug(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
bda8e775 SK |
1939 | |
1940 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1941 | if (IS_ERR(req)) { | |
1942 | err = PTR_ERR(req); | |
1943 | goto error; | |
1944 | } | |
1945 | ||
1946 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1947 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1948 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1949 | if (err) { | |
348b5901 | 1950 | trace_9p_protocol_dump(clnt, req->rc); |
bda8e775 SK |
1951 | p9_free_req(clnt, req); |
1952 | goto error; | |
1953 | } | |
1954 | ||
5d385153 | 1955 | p9_debug(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
bda8e775 SK |
1956 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
1957 | "fsid %llu namelen %ld\n", | |
1958 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1959 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1960 | sb->fsid, (long int)sb->namelen); | |
1961 | ||
1962 | p9_free_req(clnt, req); | |
1963 | error: | |
1964 | return err; | |
1965 | } | |
1966 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda | 1967 | |
9e8fb38e AK |
1968 | int p9_client_rename(struct p9_fid *fid, |
1969 | struct p9_fid *newdirfid, const char *name) | |
4681dbda SK |
1970 | { |
1971 | int err; | |
1972 | struct p9_req_t *req; | |
1973 | struct p9_client *clnt; | |
1974 | ||
1975 | err = 0; | |
1976 | clnt = fid->clnt; | |
1977 | ||
5d385153 | 1978 | p9_debug(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
4681dbda SK |
1979 | fid->fid, newdirfid->fid, name); |
1980 | ||
1981 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1982 | newdirfid->fid, name); | |
1983 | if (IS_ERR(req)) { | |
1984 | err = PTR_ERR(req); | |
1985 | goto error; | |
1986 | } | |
1987 | ||
5d385153 | 1988 | p9_debug(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
4681dbda SK |
1989 | |
1990 | p9_free_req(clnt, req); | |
1991 | error: | |
1992 | return err; | |
1993 | } | |
1994 | EXPORT_SYMBOL(p9_client_rename); | |
1995 | ||
9e8fb38e AK |
1996 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
1997 | struct p9_fid *newdirfid, const char *new_name) | |
1998 | { | |
1999 | int err; | |
2000 | struct p9_req_t *req; | |
2001 | struct p9_client *clnt; | |
2002 | ||
2003 | err = 0; | |
2004 | clnt = olddirfid->clnt; | |
2005 | ||
5d385153 | 2006 | p9_debug(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
9e8fb38e AK |
2007 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, |
2008 | newdirfid->fid, new_name); | |
2009 | ||
2010 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, | |
2011 | old_name, newdirfid->fid, new_name); | |
2012 | if (IS_ERR(req)) { | |
2013 | err = PTR_ERR(req); | |
2014 | goto error; | |
2015 | } | |
2016 | ||
5d385153 | 2017 | p9_debug(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", |
9e8fb38e AK |
2018 | newdirfid->fid, new_name); |
2019 | ||
2020 | p9_free_req(clnt, req); | |
2021 | error: | |
2022 | return err; | |
2023 | } | |
2024 | EXPORT_SYMBOL(p9_client_renameat); | |
2025 | ||
0ef63f34 AK |
2026 | /* |
2027 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
2028 | */ | |
2029 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
2030 | const char *attr_name, u64 *attr_size) | |
2031 | { | |
2032 | int err; | |
2033 | struct p9_req_t *req; | |
2034 | struct p9_client *clnt; | |
2035 | struct p9_fid *attr_fid; | |
2036 | ||
2037 | err = 0; | |
2038 | clnt = file_fid->clnt; | |
2039 | attr_fid = p9_fid_create(clnt); | |
2040 | if (IS_ERR(attr_fid)) { | |
2041 | err = PTR_ERR(attr_fid); | |
2042 | attr_fid = NULL; | |
2043 | goto error; | |
2044 | } | |
5d385153 | 2045 | p9_debug(P9_DEBUG_9P, |
0ef63f34 AK |
2046 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
2047 | file_fid->fid, attr_fid->fid, attr_name); | |
2048 | ||
2049 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
2050 | file_fid->fid, attr_fid->fid, attr_name); | |
2051 | if (IS_ERR(req)) { | |
2052 | err = PTR_ERR(req); | |
2053 | goto error; | |
2054 | } | |
2055 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
2056 | if (err) { | |
348b5901 | 2057 | trace_9p_protocol_dump(clnt, req->rc); |
0ef63f34 AK |
2058 | p9_free_req(clnt, req); |
2059 | goto clunk_fid; | |
2060 | } | |
2061 | p9_free_req(clnt, req); | |
5d385153 | 2062 | p9_debug(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
0ef63f34 AK |
2063 | attr_fid->fid, *attr_size); |
2064 | return attr_fid; | |
2065 | clunk_fid: | |
2066 | p9_client_clunk(attr_fid); | |
2067 | attr_fid = NULL; | |
2068 | error: | |
2069 | if (attr_fid && (attr_fid != file_fid)) | |
2070 | p9_fid_destroy(attr_fid); | |
2071 | ||
2072 | return ERR_PTR(err); | |
2073 | } | |
2074 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
2075 | ||
eda25e46 AK |
2076 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
2077 | u64 attr_size, int flags) | |
2078 | { | |
2079 | int err; | |
2080 | struct p9_req_t *req; | |
2081 | struct p9_client *clnt; | |
2082 | ||
5d385153 | 2083 | p9_debug(P9_DEBUG_9P, |
eda25e46 AK |
2084 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
2085 | fid->fid, name, (long long)attr_size, flags); | |
2086 | err = 0; | |
2087 | clnt = fid->clnt; | |
2088 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
2089 | fid->fid, name, attr_size, flags); | |
2090 | if (IS_ERR(req)) { | |
2091 | err = PTR_ERR(req); | |
2092 | goto error; | |
2093 | } | |
5d385153 | 2094 | p9_debug(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
eda25e46 AK |
2095 | p9_free_req(clnt, req); |
2096 | error: | |
2097 | return err; | |
2098 | } | |
2099 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
2100 | ||
7751bdb3 SK |
2101 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
2102 | { | |
abfa034e | 2103 | int err, rsize, non_zc = 0; |
7751bdb3 SK |
2104 | struct p9_client *clnt; |
2105 | struct p9_req_t *req; | |
2106 | char *dataptr; | |
4f3b35c1 AV |
2107 | struct kvec kv = {.iov_base = data, .iov_len = count}; |
2108 | struct iov_iter to; | |
2109 | ||
2110 | iov_iter_kvec(&to, READ | ITER_KVEC, &kv, 1, count); | |
7751bdb3 | 2111 | |
5d385153 | 2112 | p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
95c96174 | 2113 | fid->fid, (unsigned long long) offset, count); |
7751bdb3 SK |
2114 | |
2115 | err = 0; | |
2116 | clnt = fid->clnt; | |
7751bdb3 SK |
2117 | |
2118 | rsize = fid->iounit; | |
2119 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
2120 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
2121 | ||
2122 | if (count < rsize) | |
2123 | rsize = count; | |
2124 | ||
abfa034e AK |
2125 | /* Don't bother zerocopy for small IO (< 1024) */ |
2126 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
2127 | /* | |
2128 | * response header len is 11 | |
2129 | * PDU Header(7) + IO Size (4) | |
2130 | */ | |
4f3b35c1 AV |
2131 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, &to, NULL, rsize, 0, |
2132 | 11, "dqd", fid->fid, offset, rsize); | |
2c66523f | 2133 | } else { |
abfa034e | 2134 | non_zc = 1; |
2c66523f | 2135 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e | 2136 | offset, rsize); |
2c66523f | 2137 | } |
7751bdb3 SK |
2138 | if (IS_ERR(req)) { |
2139 | err = PTR_ERR(req); | |
2140 | goto error; | |
2141 | } | |
2142 | ||
2143 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
2144 | if (err) { | |
348b5901 | 2145 | trace_9p_protocol_dump(clnt, req->rc); |
7751bdb3 SK |
2146 | goto free_and_error; |
2147 | } | |
71d6ad08 AV |
2148 | if (rsize < count) { |
2149 | pr_err("bogus RREADDIR count (%d > %d)\n", count, rsize); | |
2150 | count = rsize; | |
2151 | } | |
7751bdb3 | 2152 | |
5d385153 | 2153 | p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
7751bdb3 | 2154 | |
abfa034e | 2155 | if (non_zc) |
7751bdb3 SK |
2156 | memmove(data, dataptr, count); |
2157 | ||
2158 | p9_free_req(clnt, req); | |
2159 | return count; | |
2160 | ||
2161 | free_and_error: | |
2162 | p9_free_req(clnt, req); | |
2163 | error: | |
2164 | return err; | |
2165 | } | |
2166 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a | 2167 | |
7880b43b | 2168 | int p9_client_mknod_dotl(struct p9_fid *fid, const char *name, int mode, |
f791f7c5 | 2169 | dev_t rdev, kgid_t gid, struct p9_qid *qid) |
4b43516a MK |
2170 | { |
2171 | int err; | |
2172 | struct p9_client *clnt; | |
2173 | struct p9_req_t *req; | |
2174 | ||
2175 | err = 0; | |
2176 | clnt = fid->clnt; | |
5d385153 | 2177 | p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
4b43516a | 2178 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
f791f7c5 | 2179 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, |
4b43516a MK |
2180 | MAJOR(rdev), MINOR(rdev), gid); |
2181 | if (IS_ERR(req)) | |
2182 | return PTR_ERR(req); | |
2183 | ||
2184 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2185 | if (err) { | |
348b5901 | 2186 | trace_9p_protocol_dump(clnt, req->rc); |
4b43516a MK |
2187 | goto error; |
2188 | } | |
5d385153 | 2189 | p9_debug(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
4b43516a MK |
2190 | (unsigned long long)qid->path, qid->version); |
2191 | ||
2192 | error: | |
2193 | p9_free_req(clnt, req); | |
2194 | return err; | |
2195 | ||
2196 | } | |
2197 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd | 2198 | |
7880b43b | 2199 | int p9_client_mkdir_dotl(struct p9_fid *fid, const char *name, int mode, |
f791f7c5 | 2200 | kgid_t gid, struct p9_qid *qid) |
01a622bd MK |
2201 | { |
2202 | int err; | |
2203 | struct p9_client *clnt; | |
2204 | struct p9_req_t *req; | |
2205 | ||
2206 | err = 0; | |
2207 | clnt = fid->clnt; | |
5d385153 | 2208 | p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
f791f7c5 EB |
2209 | fid->fid, name, mode, from_kgid(&init_user_ns, gid)); |
2210 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, | |
01a622bd MK |
2211 | gid); |
2212 | if (IS_ERR(req)) | |
2213 | return PTR_ERR(req); | |
2214 | ||
2215 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2216 | if (err) { | |
348b5901 | 2217 | trace_9p_protocol_dump(clnt, req->rc); |
01a622bd MK |
2218 | goto error; |
2219 | } | |
5d385153 | 2220 | p9_debug(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
01a622bd MK |
2221 | (unsigned long long)qid->path, qid->version); |
2222 | ||
2223 | error: | |
2224 | p9_free_req(clnt, req); | |
2225 | return err; | |
2226 | ||
2227 | } | |
2228 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
a099027c MK |
2229 | |
2230 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
2231 | { | |
2232 | int err; | |
2233 | struct p9_client *clnt; | |
2234 | struct p9_req_t *req; | |
2235 | ||
2236 | err = 0; | |
2237 | clnt = fid->clnt; | |
5d385153 | 2238 | p9_debug(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
a099027c MK |
2239 | "start %lld length %lld proc_id %d client_id %s\n", |
2240 | fid->fid, flock->type, flock->flags, flock->start, | |
2241 | flock->length, flock->proc_id, flock->client_id); | |
2242 | ||
2243 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
2244 | flock->flags, flock->start, flock->length, | |
2245 | flock->proc_id, flock->client_id); | |
2246 | ||
2247 | if (IS_ERR(req)) | |
2248 | return PTR_ERR(req); | |
2249 | ||
2250 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
2251 | if (err) { | |
348b5901 | 2252 | trace_9p_protocol_dump(clnt, req->rc); |
a099027c MK |
2253 | goto error; |
2254 | } | |
5d385153 | 2255 | p9_debug(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
a099027c MK |
2256 | error: |
2257 | p9_free_req(clnt, req); | |
2258 | return err; | |
2259 | ||
2260 | } | |
2261 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1d769cd1 MK |
2262 | |
2263 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
2264 | { | |
2265 | int err; | |
2266 | struct p9_client *clnt; | |
2267 | struct p9_req_t *req; | |
2268 | ||
2269 | err = 0; | |
2270 | clnt = fid->clnt; | |
5d385153 | 2271 | p9_debug(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
1d769cd1 MK |
2272 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
2273 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2274 | ||
2275 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
2276 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2277 | ||
2278 | if (IS_ERR(req)) | |
2279 | return PTR_ERR(req); | |
2280 | ||
2281 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
2282 | &glock->start, &glock->length, &glock->proc_id, | |
2283 | &glock->client_id); | |
2284 | if (err) { | |
348b5901 | 2285 | trace_9p_protocol_dump(clnt, req->rc); |
1d769cd1 MK |
2286 | goto error; |
2287 | } | |
5d385153 | 2288 | p9_debug(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
1d769cd1 MK |
2289 | "proc_id %d client_id %s\n", glock->type, glock->start, |
2290 | glock->length, glock->proc_id, glock->client_id); | |
2291 | error: | |
2292 | p9_free_req(clnt, req); | |
2293 | return err; | |
2294 | } | |
2295 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
329176cc MK |
2296 | |
2297 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
2298 | { | |
2299 | int err; | |
2300 | struct p9_client *clnt; | |
2301 | struct p9_req_t *req; | |
2302 | ||
2303 | err = 0; | |
2304 | clnt = fid->clnt; | |
5d385153 | 2305 | p9_debug(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
329176cc MK |
2306 | |
2307 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
2308 | if (IS_ERR(req)) | |
2309 | return PTR_ERR(req); | |
2310 | ||
2311 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
2312 | if (err) { | |
348b5901 | 2313 | trace_9p_protocol_dump(clnt, req->rc); |
329176cc MK |
2314 | goto error; |
2315 | } | |
5d385153 | 2316 | p9_debug(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
329176cc MK |
2317 | error: |
2318 | p9_free_req(clnt, req); | |
2319 | return err; | |
2320 | } | |
2321 | EXPORT_SYMBOL(p9_client_readlink); |