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