Commit | Line | Data |
---|---|---|
bd238fb4 LI |
1 | /* |
2 | * net/9p/clnt.c | |
3 | * | |
4 | * 9P Client | |
5 | * | |
8a0dc95f | 6 | * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
bd238fb4 LI |
7 | * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 | |
11 | * as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
5d385153 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
bd238fb4 LI |
28 | #include <linux/module.h> |
29 | #include <linux/errno.h> | |
30 | #include <linux/fs.h> | |
8a0dc95f | 31 | #include <linux/poll.h> |
bd238fb4 LI |
32 | #include <linux/idr.h> |
33 | #include <linux/mutex.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
bd238fb4 LI |
35 | #include <linux/sched.h> |
36 | #include <linux/uaccess.h> | |
37 | #include <net/9p/9p.h> | |
fb0466c3 | 38 | #include <linux/parser.h> |
bd238fb4 | 39 | #include <net/9p/client.h> |
8b81ef58 | 40 | #include <net/9p/transport.h> |
51a87c55 | 41 | #include "protocol.h" |
bd238fb4 | 42 | |
348b5901 AK |
43 | #define CREATE_TRACE_POINTS |
44 | #include <trace/events/9p.h> | |
45 | ||
8a0dc95f EVH |
46 | /* |
47 | * Client Option Parsing (code inspired by NFS code) | |
48 | * - a little lazy - parse all client options | |
49 | */ | |
50 | ||
51 | enum { | |
52 | Opt_msize, | |
53 | Opt_trans, | |
54 | Opt_legacy, | |
0fb80abd | 55 | Opt_version, |
8a0dc95f EVH |
56 | Opt_err, |
57 | }; | |
58 | ||
a447c093 | 59 | static const match_table_t tokens = { |
8a0dc95f EVH |
60 | {Opt_msize, "msize=%u"}, |
61 | {Opt_legacy, "noextend"}, | |
62 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 63 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
64 | {Opt_err, NULL}, |
65 | }; | |
66 | ||
342fee1d SK |
67 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
68 | { | |
a02cec21 | 69 | return clnt->proto_version == p9_proto_2000L; |
342fee1d SK |
70 | } |
71 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
72 | ||
73 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
74 | { | |
a02cec21 | 75 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
76 | } |
77 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
78 | ||
43def35c SD |
79 | /* |
80 | * Some error codes are taken directly from the server replies, | |
81 | * make sure they are valid. | |
82 | */ | |
83 | static int safe_errno(int err) | |
84 | { | |
85 | if ((err > 0) || (err < -MAX_ERRNO)) { | |
86 | p9_debug(P9_DEBUG_ERROR, "Invalid error code %d\n", err); | |
87 | return -EPROTO; | |
88 | } | |
89 | return err; | |
90 | } | |
91 | ||
92 | ||
0fb80abd | 93 | /* Interpret mount option for protocol version */ |
4d63055f | 94 | static int get_protocol_version(char *s) |
0fb80abd | 95 | { |
3dc9fef6 DC |
96 | int version = -EINVAL; |
97 | ||
4d63055f | 98 | if (!strcmp(s, "9p2000")) { |
0fb80abd | 99 | version = p9_proto_legacy; |
5d385153 | 100 | p9_debug(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
4d63055f | 101 | } else if (!strcmp(s, "9p2000.u")) { |
0fb80abd | 102 | version = p9_proto_2000u; |
5d385153 | 103 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
4d63055f | 104 | } else if (!strcmp(s, "9p2000.L")) { |
45bc21ed | 105 | version = p9_proto_2000L; |
5d385153 | 106 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
4d63055f | 107 | } else |
5d385153 | 108 | pr_info("Unknown protocol version %s\n", s); |
4d63055f | 109 | |
0fb80abd SK |
110 | return version; |
111 | } | |
112 | ||
8a0dc95f | 113 | /** |
0e15597e AK |
114 | * parse_options - parse mount options into client structure |
115 | * @opts: options string passed from mount | |
116 | * @clnt: existing v9fs client information | |
8a0dc95f | 117 | * |
bb8ffdfc | 118 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
119 | */ |
120 | ||
bb8ffdfc | 121 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 122 | { |
d8c8a9e3 | 123 | char *options, *tmp_options; |
8a0dc95f EVH |
124 | char *p; |
125 | substring_t args[MAX_OPT_ARGS]; | |
126 | int option; | |
4d63055f | 127 | char *s; |
bb8ffdfc | 128 | int ret = 0; |
8a0dc95f | 129 | |
342fee1d | 130 | clnt->proto_version = p9_proto_2000u; |
8a0dc95f EVH |
131 | clnt->msize = 8192; |
132 | ||
bb8ffdfc EVH |
133 | if (!opts) |
134 | return 0; | |
135 | ||
d8c8a9e3 EVH |
136 | tmp_options = kstrdup(opts, GFP_KERNEL); |
137 | if (!tmp_options) { | |
5d385153 JP |
138 | p9_debug(P9_DEBUG_ERROR, |
139 | "failed to allocate copy of option string\n"); | |
bb8ffdfc EVH |
140 | return -ENOMEM; |
141 | } | |
d8c8a9e3 | 142 | options = tmp_options; |
8a0dc95f EVH |
143 | |
144 | while ((p = strsep(&options, ",")) != NULL) { | |
4d5077f1 | 145 | int token, r; |
8a0dc95f EVH |
146 | if (!*p) |
147 | continue; | |
148 | token = match_token(p, tokens, args); | |
4d5077f1 AK |
149 | switch (token) { |
150 | case Opt_msize: | |
151 | r = match_int(&args[0], &option); | |
bb8ffdfc | 152 | if (r < 0) { |
5d385153 JP |
153 | p9_debug(P9_DEBUG_ERROR, |
154 | "integer field, but no integer?\n"); | |
bb8ffdfc | 155 | ret = r; |
8a0dc95f EVH |
156 | continue; |
157 | } | |
8a0dc95f EVH |
158 | clnt->msize = option; |
159 | break; | |
160 | case Opt_trans: | |
4d63055f PK |
161 | s = match_strdup(&args[0]); |
162 | if (!s) { | |
163 | ret = -ENOMEM; | |
5d385153 JP |
164 | p9_debug(P9_DEBUG_ERROR, |
165 | "problem allocating copy of trans arg\n"); | |
4d63055f PK |
166 | goto free_and_return; |
167 | } | |
168 | clnt->trans_mod = v9fs_get_trans_by_name(s); | |
169 | if (clnt->trans_mod == NULL) { | |
5d385153 JP |
170 | pr_info("Could not find request transport: %s\n", |
171 | s); | |
349d3bb8 | 172 | ret = -EINVAL; |
4d63055f | 173 | kfree(s); |
349d3bb8 EVH |
174 | goto free_and_return; |
175 | } | |
4d63055f | 176 | kfree(s); |
8a0dc95f EVH |
177 | break; |
178 | case Opt_legacy: | |
342fee1d | 179 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 180 | break; |
0fb80abd | 181 | case Opt_version: |
4d63055f PK |
182 | s = match_strdup(&args[0]); |
183 | if (!s) { | |
184 | ret = -ENOMEM; | |
5d385153 JP |
185 | p9_debug(P9_DEBUG_ERROR, |
186 | "problem allocating copy of version arg\n"); | |
0fb80abd | 187 | goto free_and_return; |
4d63055f PK |
188 | } |
189 | ret = get_protocol_version(s); | |
190 | if (ret == -EINVAL) { | |
191 | kfree(s); | |
192 | goto free_and_return; | |
193 | } | |
194 | kfree(s); | |
0fb80abd SK |
195 | clnt->proto_version = ret; |
196 | break; | |
8a0dc95f EVH |
197 | default: |
198 | continue; | |
199 | } | |
200 | } | |
72029fe8 | 201 | |
349d3bb8 | 202 | free_and_return: |
d8c8a9e3 | 203 | kfree(tmp_options); |
bb8ffdfc | 204 | return ret; |
8a0dc95f EVH |
205 | } |
206 | ||
fea511a6 EVH |
207 | /** |
208 | * p9_tag_alloc - lookup/allocate a request by tag | |
209 | * @c: client session to lookup tag within | |
210 | * @tag: numeric id for transaction | |
211 | * | |
212 | * this is a simple array lookup, but will grow the | |
25985edc | 213 | * request_slots as necessary to accommodate transaction |
fea511a6 EVH |
214 | * ids which did not previously have a slot. |
215 | * | |
216 | * this code relies on the client spinlock to manage locks, its | |
217 | * possible we should switch to something else, but I'd rather | |
218 | * stick with something low-overhead for the common case. | |
219 | * | |
220 | */ | |
221 | ||
ef6b0807 DC |
222 | static struct p9_req_t * |
223 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) | |
fea511a6 EVH |
224 | { |
225 | unsigned long flags; | |
226 | int row, col; | |
51a87c55 | 227 | struct p9_req_t *req; |
abfa034e | 228 | int alloc_msize = min(c->msize, max_size); |
fea511a6 EVH |
229 | |
230 | /* This looks up the original request by tag so we know which | |
231 | * buffer to read the data into */ | |
232 | tag++; | |
233 | ||
234 | if (tag >= c->max_tag) { | |
235 | spin_lock_irqsave(&c->lock, flags); | |
236 | /* check again since original check was outside of lock */ | |
237 | while (tag >= c->max_tag) { | |
238 | row = (tag / P9_ROW_MAXTAG); | |
239 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
240 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
241 | ||
242 | if (!c->reqs[row]) { | |
5d385153 | 243 | pr_err("Couldn't grow tag array\n"); |
e45c5405 | 244 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 245 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
246 | } |
247 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
248 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 249 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
250 | } |
251 | c->max_tag += P9_ROW_MAXTAG; | |
252 | } | |
253 | spin_unlock_irqrestore(&c->lock, flags); | |
254 | } | |
255 | row = tag / P9_ROW_MAXTAG; | |
256 | col = tag % P9_ROW_MAXTAG; | |
257 | ||
51a87c55 EVH |
258 | req = &c->reqs[row][col]; |
259 | if (!req->tc) { | |
eeff66ef | 260 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
51a87c55 | 261 | if (!req->wq) { |
5d385153 | 262 | pr_err("Couldn't grow tag array\n"); |
51a87c55 EVH |
263 | return ERR_PTR(-ENOMEM); |
264 | } | |
265 | init_waitqueue_head(req->wq); | |
abfa034e AK |
266 | req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
267 | GFP_NOFS); | |
abfa034e AK |
268 | req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
269 | GFP_NOFS); | |
51a87c55 | 270 | if ((!req->tc) || (!req->rc)) { |
5d385153 | 271 | pr_err("Couldn't grow tag array\n"); |
51a87c55 EVH |
272 | kfree(req->tc); |
273 | kfree(req->rc); | |
45abdf1c TT |
274 | kfree(req->wq); |
275 | req->tc = req->rc = NULL; | |
276 | req->wq = NULL; | |
51a87c55 EVH |
277 | return ERR_PTR(-ENOMEM); |
278 | } | |
5635fd0c DC |
279 | req->tc->capacity = alloc_msize; |
280 | req->rc->capacity = alloc_msize; | |
51a87c55 | 281 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); |
51a87c55 | 282 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); |
51a87c55 EVH |
283 | } |
284 | ||
285 | p9pdu_reset(req->tc); | |
286 | p9pdu_reset(req->rc); | |
287 | ||
51a87c55 EVH |
288 | req->tc->tag = tag-1; |
289 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
290 | |
291 | return &c->reqs[row][col]; | |
292 | } | |
fea511a6 EVH |
293 | |
294 | /** | |
295 | * p9_tag_lookup - lookup a request by tag | |
296 | * @c: client session to lookup tag within | |
297 | * @tag: numeric id for transaction | |
298 | * | |
299 | */ | |
300 | ||
301 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
302 | { | |
303 | int row, col; | |
304 | ||
305 | /* This looks up the original request by tag so we know which | |
306 | * buffer to read the data into */ | |
307 | tag++; | |
308 | ||
b85f7d92 EVH |
309 | if(tag >= c->max_tag) |
310 | return NULL; | |
fea511a6 EVH |
311 | |
312 | row = tag / P9_ROW_MAXTAG; | |
313 | col = tag % P9_ROW_MAXTAG; | |
314 | ||
315 | return &c->reqs[row][col]; | |
316 | } | |
317 | EXPORT_SYMBOL(p9_tag_lookup); | |
318 | ||
319 | /** | |
320 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 321 | * @c: v9fs client struct |
fea511a6 EVH |
322 | * |
323 | * This initializes the tags structure for each client instance. | |
324 | * | |
325 | */ | |
326 | ||
327 | static int p9_tag_init(struct p9_client *c) | |
328 | { | |
329 | int err = 0; | |
330 | ||
331 | c->tagpool = p9_idpool_create(); | |
332 | if (IS_ERR(c->tagpool)) { | |
333 | err = PTR_ERR(c->tagpool); | |
fea511a6 EVH |
334 | goto error; |
335 | } | |
fe1cbaba AK |
336 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
337 | if (err < 0) { | |
338 | p9_idpool_destroy(c->tagpool); | |
339 | goto error; | |
340 | } | |
fea511a6 EVH |
341 | c->max_tag = 0; |
342 | error: | |
343 | return err; | |
344 | } | |
345 | ||
346 | /** | |
347 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 348 | * @c: v9fs client struct |
fea511a6 EVH |
349 | * |
350 | * This frees resources associated with the tags structure | |
351 | * | |
352 | */ | |
353 | static void p9_tag_cleanup(struct p9_client *c) | |
354 | { | |
355 | int row, col; | |
356 | ||
357 | /* check to insure all requests are idle */ | |
358 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
359 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
360 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
5d385153 JP |
361 | p9_debug(P9_DEBUG_MUX, |
362 | "Attempting to cleanup non-free tag %d,%d\n", | |
363 | row, col); | |
fea511a6 EVH |
364 | /* TODO: delay execution of cleanup */ |
365 | return; | |
366 | } | |
367 | } | |
368 | } | |
369 | ||
62b2be59 LI |
370 | if (c->tagpool) { |
371 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 372 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 373 | } |
fea511a6 EVH |
374 | |
375 | /* free requests associated with tags */ | |
376 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 377 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 378 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
379 | kfree(c->reqs[row][col].tc); |
380 | kfree(c->reqs[row][col].rc); | |
381 | } | |
fea511a6 EVH |
382 | kfree(c->reqs[row]); |
383 | } | |
384 | c->max_tag = 0; | |
385 | } | |
386 | ||
673d62cd EVH |
387 | /** |
388 | * p9_free_req - free a request and clean-up as necessary | |
389 | * c: client state | |
390 | * r: request to release | |
391 | * | |
392 | */ | |
393 | ||
51a87c55 | 394 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 395 | { |
51a87c55 | 396 | int tag = r->tc->tag; |
5d385153 | 397 | p9_debug(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
51a87c55 | 398 | |
673d62cd | 399 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
400 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
401 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
402 | } |
403 | ||
91b8534f EVH |
404 | /** |
405 | * p9_client_cb - call back from transport to client | |
406 | * c: client state | |
407 | * req: request received | |
408 | * | |
409 | */ | |
410 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
411 | { | |
5d385153 | 412 | p9_debug(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 | 413 | wake_up(req->wq); |
5d385153 | 414 | p9_debug(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
91b8534f EVH |
415 | } |
416 | EXPORT_SYMBOL(p9_client_cb); | |
417 | ||
51a87c55 EVH |
418 | /** |
419 | * p9_parse_header - parse header arguments out of a packet | |
420 | * @pdu: packet to parse | |
421 | * @size: size of packet | |
422 | * @type: type of request | |
423 | * @tag: tag of packet | |
424 | * @rewind: set if we need to rewind offset afterwards | |
425 | */ | |
426 | ||
427 | int | |
428 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
429 | int rewind) | |
430 | { | |
431 | int8_t r_type; | |
432 | int16_t r_tag; | |
433 | int32_t r_size; | |
434 | int offset = pdu->offset; | |
435 | int err; | |
436 | ||
437 | pdu->offset = 0; | |
438 | if (pdu->size == 0) | |
439 | pdu->size = 7; | |
440 | ||
441 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
442 | if (err) | |
443 | goto rewind_and_exit; | |
444 | ||
445 | pdu->size = r_size; | |
446 | pdu->id = r_type; | |
447 | pdu->tag = r_tag; | |
448 | ||
5d385153 JP |
449 | p9_debug(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", |
450 | pdu->size, pdu->id, pdu->tag); | |
51a87c55 EVH |
451 | |
452 | if (type) | |
453 | *type = r_type; | |
454 | if (tag) | |
455 | *tag = r_tag; | |
456 | if (size) | |
457 | *size = r_size; | |
458 | ||
459 | ||
460 | rewind_and_exit: | |
461 | if (rewind) | |
462 | pdu->offset = offset; | |
463 | return err; | |
464 | } | |
465 | EXPORT_SYMBOL(p9_parse_header); | |
466 | ||
467 | /** | |
468 | * p9_check_errors - check 9p packet for error return and process it | |
469 | * @c: current client instance | |
470 | * @req: request to parse and check for error conditions | |
471 | * | |
472 | * returns error code if one is discovered, otherwise returns 0 | |
473 | * | |
474 | * this will have to be more complicated if we have multiple | |
475 | * error packet types | |
476 | */ | |
477 | ||
478 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
479 | { | |
480 | int8_t type; | |
481 | int err; | |
ca41bb3e | 482 | int ecode; |
51a87c55 EVH |
483 | |
484 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
485 | /* |
486 | * dump the response from server | |
487 | * This should be after check errors which poplulate pdu_fcall. | |
488 | */ | |
489 | trace_9p_protocol_dump(c, req->rc); | |
51a87c55 | 490 | if (err) { |
5d385153 | 491 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
51a87c55 EVH |
492 | return err; |
493 | } | |
ca41bb3e VJJ |
494 | if (type != P9_RERROR && type != P9_RLERROR) |
495 | return 0; | |
4f7ebe80 | 496 | |
ca41bb3e VJJ |
497 | if (!p9_is_proto_dotl(c)) { |
498 | char *ename; | |
ca41bb3e | 499 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e | 500 | &ename, &ecode); |
ca41bb3e VJJ |
501 | if (err) |
502 | goto out_err; | |
4f7ebe80 | 503 | |
ca41bb3e VJJ |
504 | if (p9_is_proto_dotu(c)) |
505 | err = -ecode; | |
4f7ebe80 | 506 | |
ca41bb3e VJJ |
507 | if (!err || !IS_ERR_VALUE(err)) { |
508 | err = p9_errstr2errno(ename, strlen(ename)); | |
4f7ebe80 | 509 | |
5d385153 JP |
510 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
511 | -ecode, ename); | |
4f7ebe80 | 512 | } |
abfa034e | 513 | kfree(ename); |
ca41bb3e VJJ |
514 | } else { |
515 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
516 | err = -ecode; | |
517 | ||
5d385153 | 518 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
ca41bb3e | 519 | } |
51a87c55 | 520 | |
51a87c55 | 521 | return err; |
4f7ebe80 AB |
522 | |
523 | out_err: | |
5d385153 | 524 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
4f7ebe80 AB |
525 | |
526 | return err; | |
51a87c55 EVH |
527 | } |
528 | ||
abfa034e AK |
529 | /** |
530 | * p9_check_zc_errors - check 9p packet for error return and process it | |
531 | * @c: current client instance | |
532 | * @req: request to parse and check for error conditions | |
533 | * @in_hdrlen: Size of response protocol buffer. | |
534 | * | |
535 | * returns error code if one is discovered, otherwise returns 0 | |
536 | * | |
537 | * this will have to be more complicated if we have multiple | |
538 | * error packet types | |
539 | */ | |
540 | ||
541 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, | |
542 | char *uidata, int in_hdrlen, int kern_buf) | |
543 | { | |
544 | int err; | |
545 | int ecode; | |
546 | int8_t type; | |
547 | char *ename = NULL; | |
548 | ||
549 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
550 | /* |
551 | * dump the response from server | |
552 | * This should be after parse_header which poplulate pdu_fcall. | |
553 | */ | |
554 | trace_9p_protocol_dump(c, req->rc); | |
abfa034e | 555 | if (err) { |
5d385153 | 556 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
abfa034e AK |
557 | return err; |
558 | } | |
559 | ||
560 | if (type != P9_RERROR && type != P9_RLERROR) | |
561 | return 0; | |
562 | ||
563 | if (!p9_is_proto_dotl(c)) { | |
564 | /* Error is reported in string format */ | |
6390460a AK |
565 | int len; |
566 | /* 7 = header size for RERROR; */ | |
567 | int inline_len = in_hdrlen - 7; | |
abfa034e | 568 | |
6390460a AK |
569 | len = req->rc->size - req->rc->offset; |
570 | if (len > (P9_ZC_HDR_SZ - 7)) { | |
571 | err = -EFAULT; | |
abfa034e AK |
572 | goto out_err; |
573 | } | |
abfa034e | 574 | |
6390460a AK |
575 | ename = &req->rc->sdata[req->rc->offset]; |
576 | if (len > inline_len) { | |
577 | /* We have error in external buffer */ | |
abfa034e AK |
578 | if (kern_buf) { |
579 | memcpy(ename + inline_len, uidata, | |
580 | len - inline_len); | |
581 | } else { | |
582 | err = copy_from_user(ename + inline_len, | |
583 | uidata, len - inline_len); | |
584 | if (err) { | |
585 | err = -EFAULT; | |
6390460a | 586 | goto out_err; |
abfa034e AK |
587 | } |
588 | } | |
589 | } | |
6390460a AK |
590 | ename = NULL; |
591 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", | |
592 | &ename, &ecode); | |
593 | if (err) | |
594 | goto out_err; | |
595 | ||
596 | if (p9_is_proto_dotu(c)) | |
abfa034e | 597 | err = -ecode; |
6390460a | 598 | |
abfa034e AK |
599 | if (!err || !IS_ERR_VALUE(err)) { |
600 | err = p9_errstr2errno(ename, strlen(ename)); | |
601 | ||
5d385153 JP |
602 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
603 | -ecode, ename); | |
abfa034e AK |
604 | } |
605 | kfree(ename); | |
606 | } else { | |
607 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
608 | err = -ecode; | |
609 | ||
5d385153 | 610 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
abfa034e AK |
611 | } |
612 | return err; | |
613 | ||
abfa034e | 614 | out_err: |
5d385153 | 615 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
abfa034e AK |
616 | return err; |
617 | } | |
618 | ||
aca00763 RL |
619 | static struct p9_req_t * |
620 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
621 | ||
51a87c55 EVH |
622 | /** |
623 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
624 | * @c: client state |
625 | * @oldreq: request to cancel | |
51a87c55 | 626 | * |
aca00763 | 627 | * This sents a flush for a particular request and links |
51a87c55 EVH |
628 | * the flush request to the original request. The current |
629 | * code only supports a single flush request although the protocol | |
630 | * allows for multiple flush requests to be sent for a single request. | |
631 | * | |
632 | */ | |
633 | ||
634 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
635 | { | |
636 | struct p9_req_t *req; | |
637 | int16_t oldtag; | |
638 | int err; | |
639 | ||
640 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
641 | if (err) | |
642 | return err; | |
643 | ||
5d385153 | 644 | p9_debug(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
51a87c55 EVH |
645 | |
646 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
647 | if (IS_ERR(req)) | |
648 | return PTR_ERR(req); | |
649 | ||
51a87c55 | 650 | |
1bab88b2 LI |
651 | /* if we haven't received a response for oldreq, |
652 | remove it from the list. */ | |
653 | spin_lock(&c->lock); | |
654 | if (oldreq->status == REQ_STATUS_FLSH) | |
655 | list_del(&oldreq->req_list); | |
656 | spin_unlock(&c->lock); | |
657 | ||
658 | p9_free_req(c, req); | |
51a87c55 EVH |
659 | return 0; |
660 | } | |
661 | ||
abfa034e AK |
662 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
663 | int8_t type, int req_size, | |
664 | const char *fmt, va_list ap) | |
91b8534f | 665 | { |
51a87c55 | 666 | int tag, err; |
91b8534f | 667 | struct p9_req_t *req; |
91b8534f | 668 | |
5d385153 | 669 | p9_debug(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 670 | |
6d96d3ab AK |
671 | /* we allow for any status other than disconnected */ |
672 | if (c->status == Disconnected) | |
673 | return ERR_PTR(-EIO); | |
674 | ||
675 | /* if status is begin_disconnected we allow only clunk request */ | |
676 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 677 | return ERR_PTR(-EIO); |
91b8534f | 678 | |
91b8534f | 679 | tag = P9_NOTAG; |
51a87c55 | 680 | if (type != P9_TVERSION) { |
91b8534f EVH |
681 | tag = p9_idpool_get(c->tagpool); |
682 | if (tag < 0) | |
51a87c55 | 683 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
684 | } |
685 | ||
abfa034e | 686 | req = p9_tag_alloc(c, tag, req_size); |
51a87c55 EVH |
687 | if (IS_ERR(req)) |
688 | return req; | |
91b8534f | 689 | |
51a87c55 EVH |
690 | /* marshall the data */ |
691 | p9pdu_prepare(req->tc, tag, type); | |
342fee1d | 692 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe AK |
693 | if (err) |
694 | goto reterr; | |
348b5901 AK |
695 | p9pdu_finalize(c, req->tc); |
696 | trace_9p_client_req(c, type, tag); | |
abfa034e AK |
697 | return req; |
698 | reterr: | |
699 | p9_free_req(c, req); | |
700 | return ERR_PTR(err); | |
701 | } | |
702 | ||
703 | /** | |
704 | * p9_client_rpc - issue a request and wait for a response | |
705 | * @c: client session | |
706 | * @type: type of request | |
707 | * @fmt: protocol format string (see protocol.c) | |
708 | * | |
709 | * Returns request structure (which client must free using p9_free_req) | |
710 | */ | |
711 | ||
712 | static struct p9_req_t * | |
713 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
714 | { | |
715 | va_list ap; | |
716 | int sigpending, err; | |
717 | unsigned long flags; | |
718 | struct p9_req_t *req; | |
719 | ||
720 | va_start(ap, fmt); | |
721 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); | |
722 | va_end(ap); | |
723 | if (IS_ERR(req)) | |
724 | return req; | |
725 | ||
726 | if (signal_pending(current)) { | |
727 | sigpending = 1; | |
728 | clear_thread_flag(TIF_SIGPENDING); | |
729 | } else | |
730 | sigpending = 0; | |
91b8534f EVH |
731 | |
732 | err = c->trans_mod->request(c, req); | |
733 | if (err < 0) { | |
3cd79678 | 734 | if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d | 735 | c->status = Disconnected; |
91b8534f EVH |
736 | goto reterr; |
737 | } | |
a314f274 | 738 | again: |
abfa034e | 739 | /* Wait for the response */ |
91b8534f | 740 | err = wait_event_interruptible(*req->wq, |
abfa034e | 741 | req->status >= REQ_STATUS_RCVD); |
91b8534f | 742 | |
a314f274 JG |
743 | if ((err == -ERESTARTSYS) && (c->status == Connected) |
744 | && (type == P9_TFLUSH)) { | |
745 | sigpending = 1; | |
746 | clear_thread_flag(TIF_SIGPENDING); | |
747 | goto again; | |
748 | } | |
749 | ||
91b8534f | 750 | if (req->status == REQ_STATUS_ERROR) { |
5d385153 | 751 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 752 | err = req->t_err; |
91b8534f | 753 | } |
1bab88b2 | 754 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
5d385153 | 755 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 756 | sigpending = 1; |
91b8534f EVH |
757 | clear_thread_flag(TIF_SIGPENDING); |
758 | ||
1bab88b2 LI |
759 | if (c->trans_mod->cancel(c, req)) |
760 | p9_client_flush(c, req); | |
761 | ||
762 | /* if we received the response anyway, don't signal error */ | |
763 | if (req->status == REQ_STATUS_RCVD) | |
764 | err = 0; | |
91b8534f | 765 | } |
91b8534f EVH |
766 | if (sigpending) { |
767 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
768 | recalc_sigpending(); | |
769 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
770 | } | |
91b8534f EVH |
771 | if (err < 0) |
772 | goto reterr; | |
773 | ||
51a87c55 | 774 | err = p9_check_errors(c, req); |
348b5901 AK |
775 | trace_9p_client_res(c, type, req->rc->tag, err); |
776 | if (!err) | |
51a87c55 | 777 | return req; |
abfa034e | 778 | reterr: |
abfa034e | 779 | p9_free_req(c, req); |
43def35c | 780 | return ERR_PTR(safe_errno(err)); |
abfa034e AK |
781 | } |
782 | ||
783 | /** | |
784 | * p9_client_zc_rpc - issue a request and wait for a response | |
785 | * @c: client session | |
786 | * @type: type of request | |
787 | * @uidata: user bffer that should be ued for zero copy read | |
788 | * @uodata: user buffer that shoud be user for zero copy write | |
789 | * @inlen: read buffer size | |
790 | * @olen: write buffer size | |
791 | * @hdrlen: reader header size, This is the size of response protocol data | |
792 | * @fmt: protocol format string (see protocol.c) | |
793 | * | |
794 | * Returns request structure (which client must free using p9_free_req) | |
795 | */ | |
796 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, | |
797 | char *uidata, char *uodata, | |
798 | int inlen, int olen, int in_hdrlen, | |
799 | int kern_buf, const char *fmt, ...) | |
800 | { | |
801 | va_list ap; | |
802 | int sigpending, err; | |
803 | unsigned long flags; | |
804 | struct p9_req_t *req; | |
805 | ||
806 | va_start(ap, fmt); | |
807 | /* | |
808 | * We allocate a inline protocol data of only 4k bytes. | |
809 | * The actual content is passed in zero-copy fashion. | |
810 | */ | |
811 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); | |
812 | va_end(ap); | |
813 | if (IS_ERR(req)) | |
814 | return req; | |
815 | ||
816 | if (signal_pending(current)) { | |
817 | sigpending = 1; | |
818 | clear_thread_flag(TIF_SIGPENDING); | |
819 | } else | |
820 | sigpending = 0; | |
821 | ||
822 | /* If we are called with KERNEL_DS force kern_buf */ | |
823 | if (segment_eq(get_fs(), KERNEL_DS)) | |
824 | kern_buf = 1; | |
825 | ||
826 | err = c->trans_mod->zc_request(c, req, uidata, uodata, | |
827 | inlen, olen, in_hdrlen, kern_buf); | |
828 | if (err < 0) { | |
829 | if (err == -EIO) | |
830 | c->status = Disconnected; | |
ec1b9d0f AV |
831 | if (err != -ERESTARTSYS) |
832 | goto reterr; | |
abfa034e AK |
833 | } |
834 | if (req->status == REQ_STATUS_ERROR) { | |
5d385153 | 835 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
abfa034e AK |
836 | err = req->t_err; |
837 | } | |
838 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
5d385153 | 839 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
abfa034e AK |
840 | sigpending = 1; |
841 | clear_thread_flag(TIF_SIGPENDING); | |
91b8534f | 842 | |
abfa034e AK |
843 | if (c->trans_mod->cancel(c, req)) |
844 | p9_client_flush(c, req); | |
845 | ||
846 | /* if we received the response anyway, don't signal error */ | |
847 | if (req->status == REQ_STATUS_RCVD) | |
848 | err = 0; | |
849 | } | |
850 | if (sigpending) { | |
851 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
852 | recalc_sigpending(); | |
853 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
854 | } | |
855 | if (err < 0) | |
856 | goto reterr; | |
857 | ||
858 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf); | |
348b5901 AK |
859 | trace_9p_client_res(c, type, req->rc->tag, err); |
860 | if (!err) | |
abfa034e | 861 | return req; |
91b8534f EVH |
862 | reterr: |
863 | p9_free_req(c, req); | |
43def35c | 864 | return ERR_PTR(safe_errno(err)); |
91b8534f EVH |
865 | } |
866 | ||
5503ac56 EVH |
867 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
868 | { | |
9f3e9bbe | 869 | int ret; |
5503ac56 | 870 | struct p9_fid *fid; |
cac23d65 | 871 | unsigned long flags; |
5503ac56 | 872 | |
5d385153 | 873 | p9_debug(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
874 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
875 | if (!fid) | |
876 | return ERR_PTR(-ENOMEM); | |
877 | ||
9f3e9bbe | 878 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 879 | if (ret < 0) { |
9f3e9bbe | 880 | ret = -ENOSPC; |
5503ac56 EVH |
881 | goto error; |
882 | } | |
9f3e9bbe | 883 | fid->fid = ret; |
5503ac56 EVH |
884 | |
885 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
886 | fid->mode = -1; | |
f8b9d53a | 887 | fid->uid = current_fsuid(); |
5503ac56 | 888 | fid->clnt = clnt; |
3e2796a9 | 889 | fid->rdir = NULL; |
cac23d65 | 890 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 891 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 892 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
893 | |
894 | return fid; | |
895 | ||
896 | error: | |
897 | kfree(fid); | |
9f3e9bbe | 898 | return ERR_PTR(ret); |
5503ac56 EVH |
899 | } |
900 | ||
901 | static void p9_fid_destroy(struct p9_fid *fid) | |
902 | { | |
903 | struct p9_client *clnt; | |
cac23d65 | 904 | unsigned long flags; |
5503ac56 | 905 | |
5d385153 | 906 | p9_debug(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
907 | clnt = fid->clnt; |
908 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 909 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 910 | list_del(&fid->flist); |
cac23d65 | 911 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 912 | kfree(fid->rdir); |
5503ac56 EVH |
913 | kfree(fid); |
914 | } | |
8a0dc95f | 915 | |
32a875ad | 916 | static int p9_client_version(struct p9_client *c) |
bd238fb4 | 917 | { |
6936bf60 | 918 | int err = 0; |
51a87c55 EVH |
919 | struct p9_req_t *req; |
920 | char *version; | |
921 | int msize; | |
bd238fb4 | 922 | |
5d385153 JP |
923 | p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
924 | c->msize, c->proto_version); | |
c5a7697d SK |
925 | |
926 | switch (c->proto_version) { | |
45bc21ed | 927 | case p9_proto_2000L: |
c5a7697d | 928 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 929 | c->msize, "9P2000.L"); |
c5a7697d SK |
930 | break; |
931 | case p9_proto_2000u: | |
932 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
933 | c->msize, "9P2000.u"); | |
934 | break; | |
935 | case p9_proto_legacy: | |
936 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
937 | c->msize, "9P2000"); | |
938 | break; | |
939 | default: | |
940 | return -EINVAL; | |
941 | break; | |
942 | } | |
943 | ||
51a87c55 EVH |
944 | if (IS_ERR(req)) |
945 | return PTR_ERR(req); | |
6936bf60 | 946 | |
342fee1d | 947 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 | 948 | if (err) { |
5d385153 | 949 | p9_debug(P9_DEBUG_9P, "version error %d\n", err); |
348b5901 | 950 | trace_9p_protocol_dump(c, req->rc); |
6936bf60 | 951 | goto error; |
51a87c55 | 952 | } |
6936bf60 | 953 | |
5d385153 | 954 | p9_debug(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
955 | if (!strncmp(version, "9P2000.L", 8)) |
956 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 957 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
958 | c->proto_version = p9_proto_2000u; |
959 | else if (!strncmp(version, "9P2000", 6)) | |
960 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
961 | else { |
962 | err = -EREMOTEIO; | |
963 | goto error; | |
964 | } | |
965 | ||
51a87c55 EVH |
966 | if (msize < c->msize) |
967 | c->msize = msize; | |
6936bf60 EVH |
968 | |
969 | error: | |
51a87c55 EVH |
970 | kfree(version); |
971 | p9_free_req(c, req); | |
6936bf60 EVH |
972 | |
973 | return err; | |
974 | } | |
6936bf60 EVH |
975 | |
976 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
977 | { | |
978 | int err; | |
979 | struct p9_client *clnt; | |
980 | ||
981 | err = 0; | |
bd238fb4 LI |
982 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
983 | if (!clnt) | |
984 | return ERR_PTR(-ENOMEM); | |
985 | ||
72029fe8 | 986 | clnt->trans_mod = NULL; |
bb8ffdfc | 987 | clnt->trans = NULL; |
bd238fb4 | 988 | spin_lock_init(&clnt->lock); |
bd238fb4 | 989 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 990 | |
fe1cbaba AK |
991 | err = p9_tag_init(clnt); |
992 | if (err < 0) | |
993 | goto free_client; | |
fea511a6 | 994 | |
bb8ffdfc EVH |
995 | err = parse_opts(options, clnt); |
996 | if (err < 0) | |
fe1cbaba | 997 | goto destroy_tagpool; |
bb8ffdfc | 998 | |
a17d1720 AK |
999 | if (!clnt->trans_mod) |
1000 | clnt->trans_mod = v9fs_get_default_trans(); | |
1001 | ||
8a0dc95f EVH |
1002 | if (clnt->trans_mod == NULL) { |
1003 | err = -EPROTONOSUPPORT; | |
5d385153 JP |
1004 | p9_debug(P9_DEBUG_ERROR, |
1005 | "No transport defined or default transport\n"); | |
fe1cbaba | 1006 | goto destroy_tagpool; |
8781ff94 EVH |
1007 | } |
1008 | ||
1009 | clnt->fidpool = p9_idpool_create(); | |
1010 | if (IS_ERR(clnt->fidpool)) { | |
1011 | err = PTR_ERR(clnt->fidpool); | |
8781ff94 | 1012 | goto put_trans; |
8a0dc95f EVH |
1013 | } |
1014 | ||
5d385153 JP |
1015 | p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
1016 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 1017 | |
8b81ef58 EVH |
1018 | err = clnt->trans_mod->create(clnt, dev_name, options); |
1019 | if (err) | |
8781ff94 | 1020 | goto destroy_fidpool; |
bd238fb4 | 1021 | |
c9ffb05c VJJ |
1022 | if (clnt->msize > clnt->trans_mod->maxsize) |
1023 | clnt->msize = clnt->trans_mod->maxsize; | |
8a0dc95f | 1024 | |
6936bf60 | 1025 | err = p9_client_version(clnt); |
bd238fb4 | 1026 | if (err) |
8781ff94 | 1027 | goto close_trans; |
bd238fb4 | 1028 | |
bd238fb4 LI |
1029 | return clnt; |
1030 | ||
8781ff94 EVH |
1031 | close_trans: |
1032 | clnt->trans_mod->close(clnt); | |
1033 | destroy_fidpool: | |
1034 | p9_idpool_destroy(clnt->fidpool); | |
1035 | put_trans: | |
1036 | v9fs_put_trans(clnt->trans_mod); | |
fe1cbaba AK |
1037 | destroy_tagpool: |
1038 | p9_idpool_destroy(clnt->tagpool); | |
8781ff94 EVH |
1039 | free_client: |
1040 | kfree(clnt); | |
bd238fb4 LI |
1041 | return ERR_PTR(err); |
1042 | } | |
1043 | EXPORT_SYMBOL(p9_client_create); | |
1044 | ||
1045 | void p9_client_destroy(struct p9_client *clnt) | |
1046 | { | |
1047 | struct p9_fid *fid, *fidptr; | |
1048 | ||
5d385153 | 1049 | p9_debug(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 1050 | |
8b81ef58 EVH |
1051 | if (clnt->trans_mod) |
1052 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 1053 | |
72029fe8 TH |
1054 | v9fs_put_trans(clnt->trans_mod); |
1055 | ||
6d96d3ab | 1056 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
5d385153 | 1057 | pr_info("Found fid %d not clunked\n", fid->fid); |
bd238fb4 | 1058 | p9_fid_destroy(fid); |
6d96d3ab | 1059 | } |
bd238fb4 | 1060 | |
0af8887e EVH |
1061 | if (clnt->fidpool) |
1062 | p9_idpool_destroy(clnt->fidpool); | |
1063 | ||
fea511a6 EVH |
1064 | p9_tag_cleanup(clnt); |
1065 | ||
bd238fb4 LI |
1066 | kfree(clnt); |
1067 | } | |
1068 | EXPORT_SYMBOL(p9_client_destroy); | |
1069 | ||
1070 | void p9_client_disconnect(struct p9_client *clnt) | |
1071 | { | |
5d385153 | 1072 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
8b81ef58 | 1073 | clnt->status = Disconnected; |
bd238fb4 LI |
1074 | } |
1075 | EXPORT_SYMBOL(p9_client_disconnect); | |
1076 | ||
6d96d3ab AK |
1077 | void p9_client_begin_disconnect(struct p9_client *clnt) |
1078 | { | |
5d385153 | 1079 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
6d96d3ab AK |
1080 | clnt->status = BeginDisconnect; |
1081 | } | |
1082 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
1083 | ||
bd238fb4 | 1084 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
f791f7c5 | 1085 | char *uname, kuid_t n_uname, char *aname) |
bd238fb4 | 1086 | { |
348b5901 | 1087 | int err = 0; |
51a87c55 | 1088 | struct p9_req_t *req; |
bd238fb4 | 1089 | struct p9_fid *fid; |
51a87c55 | 1090 | struct p9_qid qid; |
bd238fb4 | 1091 | |
bd238fb4 | 1092 | |
5d385153 JP |
1093 | p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
1094 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 LI |
1095 | fid = p9_fid_create(clnt); |
1096 | if (IS_ERR(fid)) { | |
1097 | err = PTR_ERR(fid); | |
1098 | fid = NULL; | |
1099 | goto error; | |
1100 | } | |
1101 | ||
f791f7c5 | 1102 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, |
51a87c55 EVH |
1103 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
1104 | if (IS_ERR(req)) { | |
1105 | err = PTR_ERR(req); | |
bd238fb4 LI |
1106 | goto error; |
1107 | } | |
1108 | ||
342fee1d | 1109 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 1110 | if (err) { |
348b5901 | 1111 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1112 | p9_free_req(clnt, req); |
bd238fb4 | 1113 | goto error; |
51a87c55 | 1114 | } |
bd238fb4 | 1115 | |
5d385153 JP |
1116 | p9_debug(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
1117 | qid.type, (unsigned long long)qid.path, qid.version); | |
51a87c55 EVH |
1118 | |
1119 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
1120 | ||
1121 | p9_free_req(clnt, req); | |
bd238fb4 LI |
1122 | return fid; |
1123 | ||
1124 | error: | |
bd238fb4 LI |
1125 | if (fid) |
1126 | p9_fid_destroy(fid); | |
1127 | return ERR_PTR(err); | |
1128 | } | |
1129 | EXPORT_SYMBOL(p9_client_attach); | |
1130 | ||
b76225e2 HPB |
1131 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
1132 | char **wnames, int clone) | |
bd238fb4 LI |
1133 | { |
1134 | int err; | |
bd238fb4 LI |
1135 | struct p9_client *clnt; |
1136 | struct p9_fid *fid; | |
51a87c55 EVH |
1137 | struct p9_qid *wqids; |
1138 | struct p9_req_t *req; | |
b76225e2 | 1139 | uint16_t nwqids, count; |
bd238fb4 | 1140 | |
bd238fb4 | 1141 | err = 0; |
62b2be59 | 1142 | wqids = NULL; |
bd238fb4 LI |
1143 | clnt = oldfid->clnt; |
1144 | if (clone) { | |
1145 | fid = p9_fid_create(clnt); | |
1146 | if (IS_ERR(fid)) { | |
1147 | err = PTR_ERR(fid); | |
1148 | fid = NULL; | |
1149 | goto error; | |
1150 | } | |
1151 | ||
1152 | fid->uid = oldfid->uid; | |
1153 | } else | |
1154 | fid = oldfid; | |
1155 | ||
51a87c55 | 1156 | |
5d385153 JP |
1157 | p9_debug(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
1158 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); | |
51a87c55 EVH |
1159 | |
1160 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
1161 | nwname, wnames); | |
1162 | if (IS_ERR(req)) { | |
1163 | err = PTR_ERR(req); | |
bd238fb4 LI |
1164 | goto error; |
1165 | } | |
1166 | ||
342fee1d | 1167 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 | 1168 | if (err) { |
348b5901 | 1169 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 | 1170 | p9_free_req(clnt, req); |
51a87c55 | 1171 | goto clunk_fid; |
e7f4b8f1 EVH |
1172 | } |
1173 | p9_free_req(clnt, req); | |
bd238fb4 | 1174 | |
5d385153 | 1175 | p9_debug(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
51a87c55 EVH |
1176 | |
1177 | if (nwqids != nwname) { | |
bd238fb4 LI |
1178 | err = -ENOENT; |
1179 | goto clunk_fid; | |
1180 | } | |
1181 | ||
51a87c55 | 1182 | for (count = 0; count < nwqids; count++) |
5d385153 | 1183 | p9_debug(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
b0d5fdef RD |
1184 | count, wqids[count].type, |
1185 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
1186 | wqids[count].version); |
1187 | ||
bd238fb4 | 1188 | if (nwname) |
51a87c55 | 1189 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
1190 | else |
1191 | fid->qid = oldfid->qid; | |
1192 | ||
62b2be59 | 1193 | kfree(wqids); |
bd238fb4 LI |
1194 | return fid; |
1195 | ||
1196 | clunk_fid: | |
62b2be59 | 1197 | kfree(wqids); |
51a87c55 EVH |
1198 | p9_client_clunk(fid); |
1199 | fid = NULL; | |
bd238fb4 LI |
1200 | |
1201 | error: | |
bd238fb4 LI |
1202 | if (fid && (fid != oldfid)) |
1203 | p9_fid_destroy(fid); | |
1204 | ||
1205 | return ERR_PTR(err); | |
1206 | } | |
1207 | EXPORT_SYMBOL(p9_client_walk); | |
1208 | ||
1209 | int p9_client_open(struct p9_fid *fid, int mode) | |
1210 | { | |
1211 | int err; | |
bd238fb4 | 1212 | struct p9_client *clnt; |
51a87c55 EVH |
1213 | struct p9_req_t *req; |
1214 | struct p9_qid qid; | |
1215 | int iounit; | |
bd238fb4 | 1216 | |
bd238fb4 | 1217 | clnt = fid->clnt; |
5d385153 | 1218 | p9_debug(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
ef56547e MK |
1219 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
1220 | err = 0; | |
bd238fb4 LI |
1221 | |
1222 | if (fid->mode != -1) | |
1223 | return -EINVAL; | |
1224 | ||
ef56547e MK |
1225 | if (p9_is_proto_dotl(clnt)) |
1226 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1227 | else | |
1228 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1229 | if (IS_ERR(req)) { |
1230 | err = PTR_ERR(req); | |
1231 | goto error; | |
bd238fb4 LI |
1232 | } |
1233 | ||
342fee1d | 1234 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1235 | if (err) { |
348b5901 | 1236 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1237 | goto free_and_error; |
1238 | } | |
51a87c55 | 1239 | |
5d385153 | 1240 | p9_debug(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
ef56547e MK |
1241 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
1242 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1243 | |
1244 | fid->mode = mode; | |
51a87c55 | 1245 | fid->iounit = iounit; |
bd238fb4 | 1246 | |
e7f4b8f1 EVH |
1247 | free_and_error: |
1248 | p9_free_req(clnt, req); | |
51a87c55 | 1249 | error: |
bd238fb4 LI |
1250 | return err; |
1251 | } | |
1252 | EXPORT_SYMBOL(p9_client_open); | |
1253 | ||
5643135a | 1254 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
f791f7c5 | 1255 | kgid_t gid, struct p9_qid *qid) |
5643135a VJJ |
1256 | { |
1257 | int err = 0; | |
1258 | struct p9_client *clnt; | |
1259 | struct p9_req_t *req; | |
1260 | int iounit; | |
1261 | ||
5d385153 | 1262 | p9_debug(P9_DEBUG_9P, |
5643135a | 1263 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
f791f7c5 EB |
1264 | ofid->fid, name, flags, mode, |
1265 | from_kgid(&init_user_ns, gid)); | |
5643135a VJJ |
1266 | clnt = ofid->clnt; |
1267 | ||
1268 | if (ofid->mode != -1) | |
1269 | return -EINVAL; | |
1270 | ||
f791f7c5 | 1271 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, |
5643135a VJJ |
1272 | mode, gid); |
1273 | if (IS_ERR(req)) { | |
1274 | err = PTR_ERR(req); | |
1275 | goto error; | |
1276 | } | |
1277 | ||
1278 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1279 | if (err) { | |
348b5901 | 1280 | trace_9p_protocol_dump(clnt, req->rc); |
5643135a VJJ |
1281 | goto free_and_error; |
1282 | } | |
1283 | ||
5d385153 | 1284 | p9_debug(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
5643135a VJJ |
1285 | qid->type, |
1286 | (unsigned long long)qid->path, | |
1287 | qid->version, iounit); | |
1288 | ||
1289 | ofid->mode = mode; | |
1290 | ofid->iounit = iounit; | |
1291 | ||
1292 | free_and_error: | |
1293 | p9_free_req(clnt, req); | |
1294 | error: | |
1295 | return err; | |
1296 | } | |
1297 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1298 | ||
bd238fb4 LI |
1299 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1300 | char *extension) | |
1301 | { | |
1302 | int err; | |
bd238fb4 | 1303 | struct p9_client *clnt; |
51a87c55 EVH |
1304 | struct p9_req_t *req; |
1305 | struct p9_qid qid; | |
1306 | int iounit; | |
bd238fb4 | 1307 | |
5d385153 | 1308 | p9_debug(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
51a87c55 | 1309 | fid->fid, name, perm, mode); |
bd238fb4 | 1310 | err = 0; |
bd238fb4 LI |
1311 | clnt = fid->clnt; |
1312 | ||
1313 | if (fid->mode != -1) | |
1314 | return -EINVAL; | |
1315 | ||
51a87c55 EVH |
1316 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1317 | mode, extension); | |
1318 | if (IS_ERR(req)) { | |
1319 | err = PTR_ERR(req); | |
1320 | goto error; | |
bd238fb4 LI |
1321 | } |
1322 | ||
342fee1d | 1323 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1324 | if (err) { |
348b5901 | 1325 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1326 | goto free_and_error; |
1327 | } | |
51a87c55 | 1328 | |
5d385153 | 1329 | p9_debug(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
b0d5fdef RD |
1330 | qid.type, |
1331 | (unsigned long long)qid.path, | |
1332 | qid.version, iounit); | |
bd238fb4 LI |
1333 | |
1334 | fid->mode = mode; | |
51a87c55 | 1335 | fid->iounit = iounit; |
bd238fb4 | 1336 | |
e7f4b8f1 EVH |
1337 | free_and_error: |
1338 | p9_free_req(clnt, req); | |
51a87c55 | 1339 | error: |
bd238fb4 LI |
1340 | return err; |
1341 | } | |
1342 | EXPORT_SYMBOL(p9_client_fcreate); | |
1343 | ||
f791f7c5 | 1344 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, kgid_t gid, |
50cc42ff VJJ |
1345 | struct p9_qid *qid) |
1346 | { | |
1347 | int err = 0; | |
1348 | struct p9_client *clnt; | |
1349 | struct p9_req_t *req; | |
1350 | ||
5d385153 | 1351 | p9_debug(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
50cc42ff VJJ |
1352 | dfid->fid, name, symtgt); |
1353 | clnt = dfid->clnt; | |
1354 | ||
f791f7c5 | 1355 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, |
50cc42ff VJJ |
1356 | gid); |
1357 | if (IS_ERR(req)) { | |
1358 | err = PTR_ERR(req); | |
1359 | goto error; | |
1360 | } | |
1361 | ||
1362 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1363 | if (err) { | |
348b5901 | 1364 | trace_9p_protocol_dump(clnt, req->rc); |
50cc42ff VJJ |
1365 | goto free_and_error; |
1366 | } | |
1367 | ||
5d385153 | 1368 | p9_debug(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
50cc42ff VJJ |
1369 | qid->type, (unsigned long long)qid->path, qid->version); |
1370 | ||
1371 | free_and_error: | |
1372 | p9_free_req(clnt, req); | |
1373 | error: | |
1374 | return err; | |
1375 | } | |
1376 | EXPORT_SYMBOL(p9_client_symlink); | |
1377 | ||
652df9a7 VJJ |
1378 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1379 | { | |
1380 | struct p9_client *clnt; | |
1381 | struct p9_req_t *req; | |
1382 | ||
5d385153 | 1383 | p9_debug(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
652df9a7 VJJ |
1384 | dfid->fid, oldfid->fid, newname); |
1385 | clnt = dfid->clnt; | |
1386 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1387 | newname); | |
1388 | if (IS_ERR(req)) | |
1389 | return PTR_ERR(req); | |
1390 | ||
5d385153 | 1391 | p9_debug(P9_DEBUG_9P, "<<< RLINK\n"); |
652df9a7 VJJ |
1392 | p9_free_req(clnt, req); |
1393 | return 0; | |
1394 | } | |
1395 | EXPORT_SYMBOL(p9_client_link); | |
1396 | ||
b165d601 | 1397 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc VJJ |
1398 | { |
1399 | int err; | |
1400 | struct p9_client *clnt; | |
1401 | struct p9_req_t *req; | |
1402 | ||
5d385153 | 1403 | p9_debug(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
b165d601 | 1404 | fid->fid, datasync); |
920e65dc VJJ |
1405 | err = 0; |
1406 | clnt = fid->clnt; | |
1407 | ||
b165d601 | 1408 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc VJJ |
1409 | if (IS_ERR(req)) { |
1410 | err = PTR_ERR(req); | |
1411 | goto error; | |
1412 | } | |
1413 | ||
5d385153 | 1414 | p9_debug(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
920e65dc VJJ |
1415 | |
1416 | p9_free_req(clnt, req); | |
1417 | ||
1418 | error: | |
1419 | return err; | |
1420 | } | |
1421 | EXPORT_SYMBOL(p9_client_fsync); | |
1422 | ||
bd238fb4 LI |
1423 | int p9_client_clunk(struct p9_fid *fid) |
1424 | { | |
1425 | int err; | |
bd238fb4 | 1426 | struct p9_client *clnt; |
51a87c55 | 1427 | struct p9_req_t *req; |
208f3c28 | 1428 | int retries = 0; |
bd238fb4 | 1429 | |
8e44a080 | 1430 | if (!fid) { |
5d385153 JP |
1431 | pr_warn("%s (%d): Trying to clunk with NULL fid\n", |
1432 | __func__, task_pid_nr(current)); | |
8e44a080 | 1433 | dump_stack(); |
1434 | return 0; | |
1435 | } | |
1436 | ||
208f3c28 JG |
1437 | again: |
1438 | p9_debug(P9_DEBUG_9P, ">>> TCLUNK fid %d (try %d)\n", fid->fid, | |
1439 | retries); | |
bd238fb4 | 1440 | err = 0; |
bd238fb4 LI |
1441 | clnt = fid->clnt; |
1442 | ||
51a87c55 EVH |
1443 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1444 | if (IS_ERR(req)) { | |
1445 | err = PTR_ERR(req); | |
1446 | goto error; | |
bd238fb4 LI |
1447 | } |
1448 | ||
5d385153 | 1449 | p9_debug(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1450 | |
51a87c55 | 1451 | p9_free_req(clnt, req); |
51a87c55 | 1452 | error: |
5034990e AK |
1453 | /* |
1454 | * Fid is not valid even after a failed clunk | |
208f3c28 JG |
1455 | * If interrupted, retry once then give up and |
1456 | * leak fid until umount. | |
5034990e | 1457 | */ |
208f3c28 JG |
1458 | if (err == -ERESTARTSYS) { |
1459 | if (retries++ == 0) | |
1460 | goto again; | |
1461 | } else | |
1462 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1463 | return err; |
1464 | } | |
1465 | EXPORT_SYMBOL(p9_client_clunk); | |
1466 | ||
1467 | int p9_client_remove(struct p9_fid *fid) | |
1468 | { | |
1469 | int err; | |
bd238fb4 | 1470 | struct p9_client *clnt; |
51a87c55 | 1471 | struct p9_req_t *req; |
bd238fb4 | 1472 | |
5d385153 | 1473 | p9_debug(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1474 | err = 0; |
bd238fb4 LI |
1475 | clnt = fid->clnt; |
1476 | ||
51a87c55 EVH |
1477 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1478 | if (IS_ERR(req)) { | |
1479 | err = PTR_ERR(req); | |
1480 | goto error; | |
bd238fb4 LI |
1481 | } |
1482 | ||
5d385153 | 1483 | p9_debug(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1484 | |
51a87c55 | 1485 | p9_free_req(clnt, req); |
51a87c55 | 1486 | error: |
208f3c28 JG |
1487 | if (err == -ERESTARTSYS) |
1488 | p9_client_clunk(fid); | |
1489 | else | |
1490 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1491 | return err; |
1492 | } | |
1493 | EXPORT_SYMBOL(p9_client_remove); | |
1494 | ||
48e370ff AK |
1495 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
1496 | { | |
1497 | int err = 0; | |
1498 | struct p9_req_t *req; | |
1499 | struct p9_client *clnt; | |
1500 | ||
5d385153 | 1501 | p9_debug(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", |
48e370ff AK |
1502 | dfid->fid, name, flags); |
1503 | ||
1504 | clnt = dfid->clnt; | |
1505 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); | |
1506 | if (IS_ERR(req)) { | |
1507 | err = PTR_ERR(req); | |
1508 | goto error; | |
1509 | } | |
5d385153 | 1510 | p9_debug(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); |
48e370ff AK |
1511 | |
1512 | p9_free_req(clnt, req); | |
1513 | error: | |
1514 | return err; | |
1515 | } | |
1516 | EXPORT_SYMBOL(p9_client_unlinkat); | |
1517 | ||
0fc9655e EVH |
1518 | int |
1519 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1520 | u32 count) | |
bd238fb4 | 1521 | { |
51a87c55 | 1522 | char *dataptr; |
abfa034e AK |
1523 | int kernel_buf = 0; |
1524 | struct p9_req_t *req; | |
1525 | struct p9_client *clnt; | |
1526 | int err, rsize, non_zc = 0; | |
1527 | ||
bd238fb4 | 1528 | |
5d385153 | 1529 | p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
95c96174 | 1530 | fid->fid, (unsigned long long) offset, count); |
bd238fb4 | 1531 | err = 0; |
bd238fb4 | 1532 | clnt = fid->clnt; |
bd238fb4 LI |
1533 | |
1534 | rsize = fid->iounit; | |
1535 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1536 | rsize = clnt->msize - P9_IOHDRSZ; | |
1537 | ||
51a87c55 EVH |
1538 | if (count < rsize) |
1539 | rsize = count; | |
bd238fb4 | 1540 | |
aca00763 | 1541 | /* Don't bother zerocopy for small IO (< 1024) */ |
abfa034e AK |
1542 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
1543 | char *indata; | |
1544 | if (data) { | |
1545 | kernel_buf = 1; | |
1546 | indata = data; | |
1547 | } else | |
f07d9010 | 1548 | indata = (__force char *)udata; |
abfa034e AK |
1549 | /* |
1550 | * response header len is 11 | |
1551 | * PDU Header(7) + IO Size (4) | |
1552 | */ | |
1553 | req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0, | |
1554 | 11, kernel_buf, "dqd", fid->fid, | |
1555 | offset, rsize); | |
bb2f8a55 | 1556 | } else { |
abfa034e | 1557 | non_zc = 1; |
bb2f8a55 | 1558 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, |
abfa034e | 1559 | rsize); |
bb2f8a55 | 1560 | } |
51a87c55 EVH |
1561 | if (IS_ERR(req)) { |
1562 | err = PTR_ERR(req); | |
1563 | goto error; | |
1564 | } | |
bd238fb4 | 1565 | |
342fee1d | 1566 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 | 1567 | if (err) { |
348b5901 | 1568 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1569 | goto free_and_error; |
e7f4b8f1 | 1570 | } |
bd238fb4 | 1571 | |
5d385153 | 1572 | p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1573 | |
abfa034e | 1574 | if (non_zc) { |
bb2f8a55 VJJ |
1575 | if (data) { |
1576 | memmove(data, dataptr, count); | |
1577 | } else { | |
1578 | err = copy_to_user(udata, dataptr, count); | |
1579 | if (err) { | |
1580 | err = -EFAULT; | |
1581 | goto free_and_error; | |
1582 | } | |
bd238fb4 | 1583 | } |
51a87c55 | 1584 | } |
51a87c55 EVH |
1585 | p9_free_req(clnt, req); |
1586 | return count; | |
bd238fb4 | 1587 | |
51a87c55 EVH |
1588 | free_and_error: |
1589 | p9_free_req(clnt, req); | |
bd238fb4 | 1590 | error: |
bd238fb4 LI |
1591 | return err; |
1592 | } | |
0fc9655e | 1593 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1594 | |
1595 | int | |
0fc9655e EVH |
1596 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1597 | u64 offset, u32 count) | |
bd238fb4 | 1598 | { |
095d3da6 | 1599 | int err, rsize; |
abfa034e | 1600 | int kernel_buf = 0; |
bd238fb4 | 1601 | struct p9_client *clnt; |
51a87c55 | 1602 | struct p9_req_t *req; |
bd238fb4 | 1603 | |
5d385153 | 1604 | p9_debug(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
95c96174 | 1605 | fid->fid, (unsigned long long) offset, count); |
bd238fb4 | 1606 | err = 0; |
bd238fb4 | 1607 | clnt = fid->clnt; |
bd238fb4 LI |
1608 | |
1609 | rsize = fid->iounit; | |
1610 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1611 | rsize = clnt->msize - P9_IOHDRSZ; | |
1612 | ||
51a87c55 EVH |
1613 | if (count < rsize) |
1614 | rsize = count; | |
1fc52481 | 1615 | |
abfa034e AK |
1616 | /* Don't bother zerocopy for small IO (< 1024) */ |
1617 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1618 | char *odata; | |
1619 | if (data) { | |
1620 | kernel_buf = 1; | |
1621 | odata = data; | |
1622 | } else | |
1623 | odata = (char *)udata; | |
1624 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize, | |
1625 | P9_ZC_HDR_SZ, kernel_buf, "dqd", | |
1626 | fid->fid, offset, rsize); | |
1fc52481 | 1627 | } else { |
1fc52481 VJJ |
1628 | if (data) |
1629 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, | |
abfa034e | 1630 | offset, rsize, data); |
1fc52481 VJJ |
1631 | else |
1632 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, | |
abfa034e | 1633 | offset, rsize, udata); |
1fc52481 | 1634 | } |
51a87c55 EVH |
1635 | if (IS_ERR(req)) { |
1636 | err = PTR_ERR(req); | |
1637 | goto error; | |
1638 | } | |
0fc9655e | 1639 | |
342fee1d | 1640 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 | 1641 | if (err) { |
348b5901 | 1642 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1643 | goto free_and_error; |
e7f4b8f1 EVH |
1644 | } |
1645 | ||
5d385153 | 1646 | p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1647 | |
51a87c55 EVH |
1648 | p9_free_req(clnt, req); |
1649 | return count; | |
bd238fb4 | 1650 | |
51a87c55 EVH |
1651 | free_and_error: |
1652 | p9_free_req(clnt, req); | |
bd238fb4 | 1653 | error: |
bd238fb4 LI |
1654 | return err; |
1655 | } | |
0fc9655e | 1656 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1657 | |
51a87c55 | 1658 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1659 | { |
51a87c55 EVH |
1660 | int err; |
1661 | struct p9_client *clnt; | |
1662 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1663 | struct p9_req_t *req; | |
1664 | u16 ignored; | |
5503ac56 | 1665 | |
5d385153 | 1666 | p9_debug(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1667 | |
5503ac56 EVH |
1668 | if (!ret) |
1669 | return ERR_PTR(-ENOMEM); | |
1670 | ||
bd238fb4 | 1671 | err = 0; |
bd238fb4 LI |
1672 | clnt = fid->clnt; |
1673 | ||
51a87c55 EVH |
1674 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1675 | if (IS_ERR(req)) { | |
1676 | err = PTR_ERR(req); | |
bd238fb4 LI |
1677 | goto error; |
1678 | } | |
1679 | ||
342fee1d | 1680 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1681 | if (err) { |
348b5901 | 1682 | trace_9p_protocol_dump(clnt, req->rc); |
eedfe1c4 AK |
1683 | p9_free_req(clnt, req); |
1684 | goto error; | |
e7f4b8f1 | 1685 | } |
bd238fb4 | 1686 | |
5d385153 | 1687 | p9_debug(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1688 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1689 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1690 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1691 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1692 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1693 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1694 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1695 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
447c5094 EB |
1696 | from_kuid(&init_user_ns, ret->n_uid), |
1697 | from_kgid(&init_user_ns, ret->n_gid), | |
1698 | from_kuid(&init_user_ns, ret->n_muid)); | |
bd238fb4 | 1699 | |
742b11a7 LI |
1700 | p9_free_req(clnt, req); |
1701 | return ret; | |
1702 | ||
bd238fb4 | 1703 | error: |
742b11a7 LI |
1704 | kfree(ret); |
1705 | return ERR_PTR(err); | |
bd238fb4 LI |
1706 | } |
1707 | EXPORT_SYMBOL(p9_client_stat); | |
1708 | ||
f0853122 SK |
1709 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1710 | u64 request_mask) | |
1711 | { | |
1712 | int err; | |
1713 | struct p9_client *clnt; | |
1714 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1715 | GFP_KERNEL); | |
1716 | struct p9_req_t *req; | |
1717 | ||
5d385153 | 1718 | p9_debug(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
f0853122 SK |
1719 | fid->fid, request_mask); |
1720 | ||
1721 | if (!ret) | |
1722 | return ERR_PTR(-ENOMEM); | |
1723 | ||
1724 | err = 0; | |
1725 | clnt = fid->clnt; | |
1726 | ||
1727 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1728 | if (IS_ERR(req)) { | |
1729 | err = PTR_ERR(req); | |
1730 | goto error; | |
1731 | } | |
1732 | ||
1733 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1734 | if (err) { | |
348b5901 | 1735 | trace_9p_protocol_dump(clnt, req->rc); |
f0853122 SK |
1736 | p9_free_req(clnt, req); |
1737 | goto error; | |
1738 | } | |
1739 | ||
5d385153 | 1740 | p9_debug(P9_DEBUG_9P, |
f0853122 SK |
1741 | "<<< RGETATTR st_result_mask=%lld\n" |
1742 | "<<< qid=%x.%llx.%x\n" | |
1743 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1744 | "<<< st_uid=%d st_gid=%d\n" | |
1745 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1746 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1747 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1748 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1749 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1750 | "<<< st_gen=%lld st_data_version=%lld", | |
1751 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
447c5094 EB |
1752 | ret->qid.version, ret->st_mode, ret->st_nlink, |
1753 | from_kuid(&init_user_ns, ret->st_uid), | |
1754 | from_kgid(&init_user_ns, ret->st_gid), | |
1755 | ret->st_rdev, ret->st_size, ret->st_blksize, | |
f0853122 SK |
1756 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
1757 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1758 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1759 | ret->st_gen, ret->st_data_version); | |
1760 | ||
1761 | p9_free_req(clnt, req); | |
1762 | return ret; | |
1763 | ||
1764 | error: | |
1765 | kfree(ret); | |
1766 | return ERR_PTR(err); | |
1767 | } | |
1768 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1769 | ||
342fee1d | 1770 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1771 | { |
1772 | int ret; | |
1773 | ||
9d6939da | 1774 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1775 | /* size[2] type[2] dev[4] qid[13] */ |
1776 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1777 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1778 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1779 | |
1780 | if (wst->name) | |
1781 | ret += strlen(wst->name); | |
1782 | if (wst->uid) | |
1783 | ret += strlen(wst->uid); | |
1784 | if (wst->gid) | |
1785 | ret += strlen(wst->gid); | |
1786 | if (wst->muid) | |
1787 | ret += strlen(wst->muid); | |
1788 | ||
c56e4acf SK |
1789 | if ((proto_version == p9_proto_2000u) || |
1790 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1791 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1792 | if (wst->extension) | |
1793 | ret += strlen(wst->extension); | |
1794 | } | |
1795 | ||
1796 | return ret; | |
1797 | } | |
1798 | ||
bd238fb4 LI |
1799 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1800 | { | |
1801 | int err; | |
51a87c55 | 1802 | struct p9_req_t *req; |
bd238fb4 LI |
1803 | struct p9_client *clnt; |
1804 | ||
453ed90d LI |
1805 | err = 0; |
1806 | clnt = fid->clnt; | |
342fee1d | 1807 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
5d385153 JP |
1808 | p9_debug(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
1809 | p9_debug(P9_DEBUG_9P, | |
e7f4b8f1 EVH |
1810 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1811 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1812 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1813 | " uid=%d gid=%d n_muid=%d\n", | |
1814 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1815 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1816 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1817 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
447c5094 EB |
1818 | from_kuid(&init_user_ns, wst->n_uid), |
1819 | from_kgid(&init_user_ns, wst->n_gid), | |
1820 | from_kuid(&init_user_ns, wst->n_muid)); | |
bd238fb4 | 1821 | |
9d6939da | 1822 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1823 | if (IS_ERR(req)) { |
1824 | err = PTR_ERR(req); | |
1825 | goto error; | |
bd238fb4 LI |
1826 | } |
1827 | ||
5d385153 | 1828 | p9_debug(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1829 | |
51a87c55 EVH |
1830 | p9_free_req(clnt, req); |
1831 | error: | |
bd238fb4 LI |
1832 | return err; |
1833 | } | |
1834 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1835 | |
87d7845a SK |
1836 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1837 | { | |
1838 | int err; | |
1839 | struct p9_req_t *req; | |
1840 | struct p9_client *clnt; | |
1841 | ||
1842 | err = 0; | |
1843 | clnt = fid->clnt; | |
5d385153 JP |
1844 | p9_debug(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
1845 | p9_debug(P9_DEBUG_9P, | |
87d7845a SK |
1846 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
1847 | " atime_sec=%lld atime_nsec=%lld\n" | |
1848 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
447c5094 EB |
1849 | p9attr->valid, p9attr->mode, |
1850 | from_kuid(&init_user_ns, p9attr->uid), | |
1851 | from_kgid(&init_user_ns, p9attr->gid), | |
87d7845a SK |
1852 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
1853 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1854 | ||
1855 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1856 | ||
1857 | if (IS_ERR(req)) { | |
1858 | err = PTR_ERR(req); | |
1859 | goto error; | |
1860 | } | |
5d385153 | 1861 | p9_debug(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
87d7845a SK |
1862 | p9_free_req(clnt, req); |
1863 | error: | |
1864 | return err; | |
1865 | } | |
1866 | EXPORT_SYMBOL(p9_client_setattr); | |
1867 | ||
bda8e775 SK |
1868 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1869 | { | |
1870 | int err; | |
1871 | struct p9_req_t *req; | |
1872 | struct p9_client *clnt; | |
1873 | ||
1874 | err = 0; | |
1875 | clnt = fid->clnt; | |
1876 | ||
5d385153 | 1877 | p9_debug(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
bda8e775 SK |
1878 | |
1879 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1880 | if (IS_ERR(req)) { | |
1881 | err = PTR_ERR(req); | |
1882 | goto error; | |
1883 | } | |
1884 | ||
1885 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1886 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1887 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1888 | if (err) { | |
348b5901 | 1889 | trace_9p_protocol_dump(clnt, req->rc); |
bda8e775 SK |
1890 | p9_free_req(clnt, req); |
1891 | goto error; | |
1892 | } | |
1893 | ||
5d385153 | 1894 | p9_debug(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
bda8e775 SK |
1895 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
1896 | "fsid %llu namelen %ld\n", | |
1897 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1898 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1899 | sb->fsid, (long int)sb->namelen); | |
1900 | ||
1901 | p9_free_req(clnt, req); | |
1902 | error: | |
1903 | return err; | |
1904 | } | |
1905 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda | 1906 | |
9e8fb38e AK |
1907 | int p9_client_rename(struct p9_fid *fid, |
1908 | struct p9_fid *newdirfid, const char *name) | |
4681dbda SK |
1909 | { |
1910 | int err; | |
1911 | struct p9_req_t *req; | |
1912 | struct p9_client *clnt; | |
1913 | ||
1914 | err = 0; | |
1915 | clnt = fid->clnt; | |
1916 | ||
5d385153 | 1917 | p9_debug(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
4681dbda SK |
1918 | fid->fid, newdirfid->fid, name); |
1919 | ||
1920 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1921 | newdirfid->fid, name); | |
1922 | if (IS_ERR(req)) { | |
1923 | err = PTR_ERR(req); | |
1924 | goto error; | |
1925 | } | |
1926 | ||
5d385153 | 1927 | p9_debug(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
4681dbda SK |
1928 | |
1929 | p9_free_req(clnt, req); | |
1930 | error: | |
1931 | return err; | |
1932 | } | |
1933 | EXPORT_SYMBOL(p9_client_rename); | |
1934 | ||
9e8fb38e AK |
1935 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
1936 | struct p9_fid *newdirfid, const char *new_name) | |
1937 | { | |
1938 | int err; | |
1939 | struct p9_req_t *req; | |
1940 | struct p9_client *clnt; | |
1941 | ||
1942 | err = 0; | |
1943 | clnt = olddirfid->clnt; | |
1944 | ||
5d385153 | 1945 | p9_debug(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
9e8fb38e AK |
1946 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, |
1947 | newdirfid->fid, new_name); | |
1948 | ||
1949 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, | |
1950 | old_name, newdirfid->fid, new_name); | |
1951 | if (IS_ERR(req)) { | |
1952 | err = PTR_ERR(req); | |
1953 | goto error; | |
1954 | } | |
1955 | ||
5d385153 | 1956 | p9_debug(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", |
9e8fb38e AK |
1957 | newdirfid->fid, new_name); |
1958 | ||
1959 | p9_free_req(clnt, req); | |
1960 | error: | |
1961 | return err; | |
1962 | } | |
1963 | EXPORT_SYMBOL(p9_client_renameat); | |
1964 | ||
0ef63f34 AK |
1965 | /* |
1966 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1967 | */ | |
1968 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1969 | const char *attr_name, u64 *attr_size) | |
1970 | { | |
1971 | int err; | |
1972 | struct p9_req_t *req; | |
1973 | struct p9_client *clnt; | |
1974 | struct p9_fid *attr_fid; | |
1975 | ||
1976 | err = 0; | |
1977 | clnt = file_fid->clnt; | |
1978 | attr_fid = p9_fid_create(clnt); | |
1979 | if (IS_ERR(attr_fid)) { | |
1980 | err = PTR_ERR(attr_fid); | |
1981 | attr_fid = NULL; | |
1982 | goto error; | |
1983 | } | |
5d385153 | 1984 | p9_debug(P9_DEBUG_9P, |
0ef63f34 AK |
1985 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
1986 | file_fid->fid, attr_fid->fid, attr_name); | |
1987 | ||
1988 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1989 | file_fid->fid, attr_fid->fid, attr_name); | |
1990 | if (IS_ERR(req)) { | |
1991 | err = PTR_ERR(req); | |
1992 | goto error; | |
1993 | } | |
1994 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
1995 | if (err) { | |
348b5901 | 1996 | trace_9p_protocol_dump(clnt, req->rc); |
0ef63f34 AK |
1997 | p9_free_req(clnt, req); |
1998 | goto clunk_fid; | |
1999 | } | |
2000 | p9_free_req(clnt, req); | |
5d385153 | 2001 | p9_debug(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
0ef63f34 AK |
2002 | attr_fid->fid, *attr_size); |
2003 | return attr_fid; | |
2004 | clunk_fid: | |
2005 | p9_client_clunk(attr_fid); | |
2006 | attr_fid = NULL; | |
2007 | error: | |
2008 | if (attr_fid && (attr_fid != file_fid)) | |
2009 | p9_fid_destroy(attr_fid); | |
2010 | ||
2011 | return ERR_PTR(err); | |
2012 | } | |
2013 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
2014 | ||
eda25e46 AK |
2015 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
2016 | u64 attr_size, int flags) | |
2017 | { | |
2018 | int err; | |
2019 | struct p9_req_t *req; | |
2020 | struct p9_client *clnt; | |
2021 | ||
5d385153 | 2022 | p9_debug(P9_DEBUG_9P, |
eda25e46 AK |
2023 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
2024 | fid->fid, name, (long long)attr_size, flags); | |
2025 | err = 0; | |
2026 | clnt = fid->clnt; | |
2027 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
2028 | fid->fid, name, attr_size, flags); | |
2029 | if (IS_ERR(req)) { | |
2030 | err = PTR_ERR(req); | |
2031 | goto error; | |
2032 | } | |
5d385153 | 2033 | p9_debug(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
eda25e46 AK |
2034 | p9_free_req(clnt, req); |
2035 | error: | |
2036 | return err; | |
2037 | } | |
2038 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
2039 | ||
7751bdb3 SK |
2040 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
2041 | { | |
abfa034e | 2042 | int err, rsize, non_zc = 0; |
7751bdb3 SK |
2043 | struct p9_client *clnt; |
2044 | struct p9_req_t *req; | |
2045 | char *dataptr; | |
2046 | ||
5d385153 | 2047 | p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
95c96174 | 2048 | fid->fid, (unsigned long long) offset, count); |
7751bdb3 SK |
2049 | |
2050 | err = 0; | |
2051 | clnt = fid->clnt; | |
7751bdb3 SK |
2052 | |
2053 | rsize = fid->iounit; | |
2054 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
2055 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
2056 | ||
2057 | if (count < rsize) | |
2058 | rsize = count; | |
2059 | ||
abfa034e AK |
2060 | /* Don't bother zerocopy for small IO (< 1024) */ |
2061 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
2062 | /* | |
2063 | * response header len is 11 | |
2064 | * PDU Header(7) + IO Size (4) | |
2065 | */ | |
2066 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0, | |
2067 | 11, 1, "dqd", fid->fid, offset, rsize); | |
2c66523f | 2068 | } else { |
abfa034e | 2069 | non_zc = 1; |
2c66523f | 2070 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e | 2071 | offset, rsize); |
2c66523f | 2072 | } |
7751bdb3 SK |
2073 | if (IS_ERR(req)) { |
2074 | err = PTR_ERR(req); | |
2075 | goto error; | |
2076 | } | |
2077 | ||
2078 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
2079 | if (err) { | |
348b5901 | 2080 | trace_9p_protocol_dump(clnt, req->rc); |
7751bdb3 SK |
2081 | goto free_and_error; |
2082 | } | |
c3b379cf AV |
2083 | if (rsize < count) { |
2084 | pr_err("bogus RREADDIR count (%d > %d)\n", count, rsize); | |
2085 | count = rsize; | |
2086 | } | |
7751bdb3 | 2087 | |
5d385153 | 2088 | p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
7751bdb3 | 2089 | |
abfa034e | 2090 | if (non_zc) |
7751bdb3 SK |
2091 | memmove(data, dataptr, count); |
2092 | ||
2093 | p9_free_req(clnt, req); | |
2094 | return count; | |
2095 | ||
2096 | free_and_error: | |
2097 | p9_free_req(clnt, req); | |
2098 | error: | |
2099 | return err; | |
2100 | } | |
2101 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
2102 | |
2103 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
f791f7c5 | 2104 | dev_t rdev, kgid_t gid, struct p9_qid *qid) |
4b43516a MK |
2105 | { |
2106 | int err; | |
2107 | struct p9_client *clnt; | |
2108 | struct p9_req_t *req; | |
2109 | ||
2110 | err = 0; | |
2111 | clnt = fid->clnt; | |
5d385153 | 2112 | p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
4b43516a | 2113 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
f791f7c5 | 2114 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, |
4b43516a MK |
2115 | MAJOR(rdev), MINOR(rdev), gid); |
2116 | if (IS_ERR(req)) | |
2117 | return PTR_ERR(req); | |
2118 | ||
2119 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2120 | if (err) { | |
348b5901 | 2121 | trace_9p_protocol_dump(clnt, req->rc); |
4b43516a MK |
2122 | goto error; |
2123 | } | |
5d385153 | 2124 | p9_debug(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
4b43516a MK |
2125 | (unsigned long long)qid->path, qid->version); |
2126 | ||
2127 | error: | |
2128 | p9_free_req(clnt, req); | |
2129 | return err; | |
2130 | ||
2131 | } | |
2132 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
2133 | |
2134 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
f791f7c5 | 2135 | kgid_t gid, struct p9_qid *qid) |
01a622bd MK |
2136 | { |
2137 | int err; | |
2138 | struct p9_client *clnt; | |
2139 | struct p9_req_t *req; | |
2140 | ||
2141 | err = 0; | |
2142 | clnt = fid->clnt; | |
5d385153 | 2143 | p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
f791f7c5 EB |
2144 | fid->fid, name, mode, from_kgid(&init_user_ns, gid)); |
2145 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, | |
01a622bd MK |
2146 | gid); |
2147 | if (IS_ERR(req)) | |
2148 | return PTR_ERR(req); | |
2149 | ||
2150 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2151 | if (err) { | |
348b5901 | 2152 | trace_9p_protocol_dump(clnt, req->rc); |
01a622bd MK |
2153 | goto error; |
2154 | } | |
5d385153 | 2155 | p9_debug(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
01a622bd MK |
2156 | (unsigned long long)qid->path, qid->version); |
2157 | ||
2158 | error: | |
2159 | p9_free_req(clnt, req); | |
2160 | return err; | |
2161 | ||
2162 | } | |
2163 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
a099027c MK |
2164 | |
2165 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
2166 | { | |
2167 | int err; | |
2168 | struct p9_client *clnt; | |
2169 | struct p9_req_t *req; | |
2170 | ||
2171 | err = 0; | |
2172 | clnt = fid->clnt; | |
5d385153 | 2173 | p9_debug(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
a099027c MK |
2174 | "start %lld length %lld proc_id %d client_id %s\n", |
2175 | fid->fid, flock->type, flock->flags, flock->start, | |
2176 | flock->length, flock->proc_id, flock->client_id); | |
2177 | ||
2178 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
2179 | flock->flags, flock->start, flock->length, | |
2180 | flock->proc_id, flock->client_id); | |
2181 | ||
2182 | if (IS_ERR(req)) | |
2183 | return PTR_ERR(req); | |
2184 | ||
2185 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
2186 | if (err) { | |
348b5901 | 2187 | trace_9p_protocol_dump(clnt, req->rc); |
a099027c MK |
2188 | goto error; |
2189 | } | |
5d385153 | 2190 | p9_debug(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
a099027c MK |
2191 | error: |
2192 | p9_free_req(clnt, req); | |
2193 | return err; | |
2194 | ||
2195 | } | |
2196 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1d769cd1 MK |
2197 | |
2198 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
2199 | { | |
2200 | int err; | |
2201 | struct p9_client *clnt; | |
2202 | struct p9_req_t *req; | |
2203 | ||
2204 | err = 0; | |
2205 | clnt = fid->clnt; | |
5d385153 | 2206 | p9_debug(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
1d769cd1 MK |
2207 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
2208 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2209 | ||
2210 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
2211 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2212 | ||
2213 | if (IS_ERR(req)) | |
2214 | return PTR_ERR(req); | |
2215 | ||
2216 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
2217 | &glock->start, &glock->length, &glock->proc_id, | |
2218 | &glock->client_id); | |
2219 | if (err) { | |
348b5901 | 2220 | trace_9p_protocol_dump(clnt, req->rc); |
1d769cd1 MK |
2221 | goto error; |
2222 | } | |
5d385153 | 2223 | p9_debug(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
1d769cd1 MK |
2224 | "proc_id %d client_id %s\n", glock->type, glock->start, |
2225 | glock->length, glock->proc_id, glock->client_id); | |
2226 | error: | |
2227 | p9_free_req(clnt, req); | |
2228 | return err; | |
2229 | } | |
2230 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
329176cc MK |
2231 | |
2232 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
2233 | { | |
2234 | int err; | |
2235 | struct p9_client *clnt; | |
2236 | struct p9_req_t *req; | |
2237 | ||
2238 | err = 0; | |
2239 | clnt = fid->clnt; | |
5d385153 | 2240 | p9_debug(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
329176cc MK |
2241 | |
2242 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
2243 | if (IS_ERR(req)) | |
2244 | return PTR_ERR(req); | |
2245 | ||
2246 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
2247 | if (err) { | |
348b5901 | 2248 | trace_9p_protocol_dump(clnt, req->rc); |
329176cc MK |
2249 | goto error; |
2250 | } | |
5d385153 | 2251 | p9_debug(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
329176cc MK |
2252 | error: |
2253 | p9_free_req(clnt, req); | |
2254 | return err; | |
2255 | } | |
2256 | EXPORT_SYMBOL(p9_client_readlink); |