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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 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
8a0dc95f | 29 | #include <linux/poll.h> |
bd238fb4 LI |
30 | #include <linux/idr.h> |
31 | #include <linux/mutex.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
bd238fb4 LI |
33 | #include <linux/sched.h> |
34 | #include <linux/uaccess.h> | |
35 | #include <net/9p/9p.h> | |
fb0466c3 | 36 | #include <linux/parser.h> |
bd238fb4 | 37 | #include <net/9p/client.h> |
8b81ef58 | 38 | #include <net/9p/transport.h> |
51a87c55 | 39 | #include "protocol.h" |
bd238fb4 | 40 | |
8a0dc95f EVH |
41 | /* |
42 | * Client Option Parsing (code inspired by NFS code) | |
43 | * - a little lazy - parse all client options | |
44 | */ | |
45 | ||
46 | enum { | |
47 | Opt_msize, | |
48 | Opt_trans, | |
49 | Opt_legacy, | |
0fb80abd | 50 | Opt_version, |
8a0dc95f EVH |
51 | Opt_err, |
52 | }; | |
53 | ||
a447c093 | 54 | static const match_table_t tokens = { |
8a0dc95f EVH |
55 | {Opt_msize, "msize=%u"}, |
56 | {Opt_legacy, "noextend"}, | |
57 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 58 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
59 | {Opt_err, NULL}, |
60 | }; | |
61 | ||
342fee1d SK |
62 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
63 | { | |
a02cec21 | 64 | return clnt->proto_version == p9_proto_2000L; |
342fee1d SK |
65 | } |
66 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
67 | ||
68 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
69 | { | |
a02cec21 | 70 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
71 | } |
72 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
73 | ||
0fb80abd | 74 | /* Interpret mount option for protocol version */ |
4d63055f | 75 | static int get_protocol_version(char *s) |
0fb80abd | 76 | { |
3dc9fef6 DC |
77 | int version = -EINVAL; |
78 | ||
4d63055f | 79 | if (!strcmp(s, "9p2000")) { |
0fb80abd SK |
80 | version = p9_proto_legacy; |
81 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); | |
4d63055f | 82 | } else if (!strcmp(s, "9p2000.u")) { |
0fb80abd SK |
83 | version = p9_proto_2000u; |
84 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); | |
4d63055f | 85 | } else if (!strcmp(s, "9p2000.L")) { |
45bc21ed SK |
86 | version = p9_proto_2000L; |
87 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); | |
4d63055f PK |
88 | } else |
89 | printk(KERN_INFO "9p: Unknown protocol version %s.\n", s); | |
90 | ||
0fb80abd SK |
91 | return version; |
92 | } | |
93 | ||
8a0dc95f | 94 | /** |
0e15597e AK |
95 | * parse_options - parse mount options into client structure |
96 | * @opts: options string passed from mount | |
97 | * @clnt: existing v9fs client information | |
8a0dc95f | 98 | * |
bb8ffdfc | 99 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
100 | */ |
101 | ||
bb8ffdfc | 102 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 103 | { |
d8c8a9e3 | 104 | char *options, *tmp_options; |
8a0dc95f EVH |
105 | char *p; |
106 | substring_t args[MAX_OPT_ARGS]; | |
107 | int option; | |
4d63055f | 108 | char *s; |
bb8ffdfc | 109 | int ret = 0; |
8a0dc95f | 110 | |
342fee1d | 111 | clnt->proto_version = p9_proto_2000u; |
8a0dc95f EVH |
112 | clnt->msize = 8192; |
113 | ||
bb8ffdfc EVH |
114 | if (!opts) |
115 | return 0; | |
116 | ||
d8c8a9e3 EVH |
117 | tmp_options = kstrdup(opts, GFP_KERNEL); |
118 | if (!tmp_options) { | |
bb8ffdfc EVH |
119 | P9_DPRINTK(P9_DEBUG_ERROR, |
120 | "failed to allocate copy of option string\n"); | |
121 | return -ENOMEM; | |
122 | } | |
d8c8a9e3 | 123 | options = tmp_options; |
8a0dc95f EVH |
124 | |
125 | while ((p = strsep(&options, ",")) != NULL) { | |
4d5077f1 | 126 | int token, r; |
8a0dc95f EVH |
127 | if (!*p) |
128 | continue; | |
129 | token = match_token(p, tokens, args); | |
4d5077f1 AK |
130 | switch (token) { |
131 | case Opt_msize: | |
132 | r = match_int(&args[0], &option); | |
bb8ffdfc | 133 | if (r < 0) { |
8a0dc95f | 134 | P9_DPRINTK(P9_DEBUG_ERROR, |
4d5077f1 | 135 | "integer field, but no integer?\n"); |
bb8ffdfc | 136 | ret = r; |
8a0dc95f EVH |
137 | continue; |
138 | } | |
8a0dc95f EVH |
139 | clnt->msize = option; |
140 | break; | |
141 | case Opt_trans: | |
4d63055f PK |
142 | s = match_strdup(&args[0]); |
143 | if (!s) { | |
144 | ret = -ENOMEM; | |
349d3bb8 | 145 | P9_DPRINTK(P9_DEBUG_ERROR, |
4d63055f PK |
146 | "problem allocating copy of trans arg\n"); |
147 | goto free_and_return; | |
148 | } | |
149 | clnt->trans_mod = v9fs_get_trans_by_name(s); | |
150 | if (clnt->trans_mod == NULL) { | |
151 | printk(KERN_INFO | |
152 | "9p: Could not find " | |
153 | "request transport: %s\n", s); | |
349d3bb8 | 154 | ret = -EINVAL; |
4d63055f | 155 | kfree(s); |
349d3bb8 EVH |
156 | goto free_and_return; |
157 | } | |
4d63055f | 158 | kfree(s); |
8a0dc95f EVH |
159 | break; |
160 | case Opt_legacy: | |
342fee1d | 161 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 162 | break; |
0fb80abd | 163 | case Opt_version: |
4d63055f PK |
164 | s = match_strdup(&args[0]); |
165 | if (!s) { | |
166 | ret = -ENOMEM; | |
167 | P9_DPRINTK(P9_DEBUG_ERROR, | |
168 | "problem allocating copy of version arg\n"); | |
0fb80abd | 169 | goto free_and_return; |
4d63055f PK |
170 | } |
171 | ret = get_protocol_version(s); | |
172 | if (ret == -EINVAL) { | |
173 | kfree(s); | |
174 | goto free_and_return; | |
175 | } | |
176 | kfree(s); | |
0fb80abd SK |
177 | clnt->proto_version = ret; |
178 | break; | |
8a0dc95f EVH |
179 | default: |
180 | continue; | |
181 | } | |
182 | } | |
72029fe8 | 183 | |
349d3bb8 | 184 | free_and_return: |
d8c8a9e3 | 185 | kfree(tmp_options); |
bb8ffdfc | 186 | return ret; |
8a0dc95f EVH |
187 | } |
188 | ||
fea511a6 EVH |
189 | /** |
190 | * p9_tag_alloc - lookup/allocate a request by tag | |
191 | * @c: client session to lookup tag within | |
192 | * @tag: numeric id for transaction | |
193 | * | |
194 | * this is a simple array lookup, but will grow the | |
25985edc | 195 | * request_slots as necessary to accommodate transaction |
fea511a6 EVH |
196 | * ids which did not previously have a slot. |
197 | * | |
198 | * this code relies on the client spinlock to manage locks, its | |
199 | * possible we should switch to something else, but I'd rather | |
200 | * stick with something low-overhead for the common case. | |
201 | * | |
202 | */ | |
203 | ||
ef6b0807 DC |
204 | static struct p9_req_t * |
205 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) | |
fea511a6 EVH |
206 | { |
207 | unsigned long flags; | |
208 | int row, col; | |
51a87c55 | 209 | struct p9_req_t *req; |
abfa034e | 210 | int alloc_msize = min(c->msize, max_size); |
fea511a6 EVH |
211 | |
212 | /* This looks up the original request by tag so we know which | |
213 | * buffer to read the data into */ | |
214 | tag++; | |
215 | ||
216 | if (tag >= c->max_tag) { | |
217 | spin_lock_irqsave(&c->lock, flags); | |
218 | /* check again since original check was outside of lock */ | |
219 | while (tag >= c->max_tag) { | |
220 | row = (tag / P9_ROW_MAXTAG); | |
221 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
222 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
223 | ||
224 | if (!c->reqs[row]) { | |
225 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
e45c5405 | 226 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 227 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
228 | } |
229 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
230 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 231 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
232 | } |
233 | c->max_tag += P9_ROW_MAXTAG; | |
234 | } | |
235 | spin_unlock_irqrestore(&c->lock, flags); | |
236 | } | |
237 | row = tag / P9_ROW_MAXTAG; | |
238 | col = tag % P9_ROW_MAXTAG; | |
239 | ||
51a87c55 EVH |
240 | req = &c->reqs[row][col]; |
241 | if (!req->tc) { | |
eeff66ef | 242 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
51a87c55 EVH |
243 | if (!req->wq) { |
244 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
245 | return ERR_PTR(-ENOMEM); | |
246 | } | |
247 | init_waitqueue_head(req->wq); | |
abfa034e AK |
248 | req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
249 | GFP_NOFS); | |
abfa034e AK |
250 | req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
251 | GFP_NOFS); | |
51a87c55 EVH |
252 | if ((!req->tc) || (!req->rc)) { |
253 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
254 | kfree(req->tc); | |
255 | kfree(req->rc); | |
45abdf1c TT |
256 | kfree(req->wq); |
257 | req->tc = req->rc = NULL; | |
258 | req->wq = NULL; | |
51a87c55 EVH |
259 | return ERR_PTR(-ENOMEM); |
260 | } | |
5635fd0c DC |
261 | req->tc->capacity = alloc_msize; |
262 | req->rc->capacity = alloc_msize; | |
51a87c55 | 263 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); |
51a87c55 | 264 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); |
51a87c55 EVH |
265 | } |
266 | ||
267 | p9pdu_reset(req->tc); | |
268 | p9pdu_reset(req->rc); | |
269 | ||
51a87c55 EVH |
270 | req->tc->tag = tag-1; |
271 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
272 | |
273 | return &c->reqs[row][col]; | |
274 | } | |
fea511a6 EVH |
275 | |
276 | /** | |
277 | * p9_tag_lookup - lookup a request by tag | |
278 | * @c: client session to lookup tag within | |
279 | * @tag: numeric id for transaction | |
280 | * | |
281 | */ | |
282 | ||
283 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
284 | { | |
285 | int row, col; | |
286 | ||
287 | /* This looks up the original request by tag so we know which | |
288 | * buffer to read the data into */ | |
289 | tag++; | |
290 | ||
b85f7d92 EVH |
291 | if(tag >= c->max_tag) |
292 | return NULL; | |
fea511a6 EVH |
293 | |
294 | row = tag / P9_ROW_MAXTAG; | |
295 | col = tag % P9_ROW_MAXTAG; | |
296 | ||
297 | return &c->reqs[row][col]; | |
298 | } | |
299 | EXPORT_SYMBOL(p9_tag_lookup); | |
300 | ||
301 | /** | |
302 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 303 | * @c: v9fs client struct |
fea511a6 EVH |
304 | * |
305 | * This initializes the tags structure for each client instance. | |
306 | * | |
307 | */ | |
308 | ||
309 | static int p9_tag_init(struct p9_client *c) | |
310 | { | |
311 | int err = 0; | |
312 | ||
313 | c->tagpool = p9_idpool_create(); | |
314 | if (IS_ERR(c->tagpool)) { | |
315 | err = PTR_ERR(c->tagpool); | |
fea511a6 EVH |
316 | goto error; |
317 | } | |
fe1cbaba AK |
318 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
319 | if (err < 0) { | |
320 | p9_idpool_destroy(c->tagpool); | |
321 | goto error; | |
322 | } | |
fea511a6 EVH |
323 | c->max_tag = 0; |
324 | error: | |
325 | return err; | |
326 | } | |
327 | ||
328 | /** | |
329 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 330 | * @c: v9fs client struct |
fea511a6 EVH |
331 | * |
332 | * This frees resources associated with the tags structure | |
333 | * | |
334 | */ | |
335 | static void p9_tag_cleanup(struct p9_client *c) | |
336 | { | |
337 | int row, col; | |
338 | ||
339 | /* check to insure all requests are idle */ | |
340 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
341 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
342 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
343 | P9_DPRINTK(P9_DEBUG_MUX, | |
344 | "Attempting to cleanup non-free tag %d,%d\n", | |
345 | row, col); | |
346 | /* TODO: delay execution of cleanup */ | |
347 | return; | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
62b2be59 LI |
352 | if (c->tagpool) { |
353 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 354 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 355 | } |
fea511a6 EVH |
356 | |
357 | /* free requests associated with tags */ | |
358 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 359 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 360 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
361 | kfree(c->reqs[row][col].tc); |
362 | kfree(c->reqs[row][col].rc); | |
363 | } | |
fea511a6 EVH |
364 | kfree(c->reqs[row]); |
365 | } | |
366 | c->max_tag = 0; | |
367 | } | |
368 | ||
673d62cd EVH |
369 | /** |
370 | * p9_free_req - free a request and clean-up as necessary | |
371 | * c: client state | |
372 | * r: request to release | |
373 | * | |
374 | */ | |
375 | ||
51a87c55 | 376 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 377 | { |
51a87c55 EVH |
378 | int tag = r->tc->tag; |
379 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
380 | ||
673d62cd | 381 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
382 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
383 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
384 | } |
385 | ||
91b8534f EVH |
386 | /** |
387 | * p9_client_cb - call back from transport to client | |
388 | * c: client state | |
389 | * req: request received | |
390 | * | |
391 | */ | |
392 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
393 | { | |
51a87c55 | 394 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 LI |
395 | wake_up(req->wq); |
396 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
91b8534f EVH |
397 | } |
398 | EXPORT_SYMBOL(p9_client_cb); | |
399 | ||
51a87c55 EVH |
400 | /** |
401 | * p9_parse_header - parse header arguments out of a packet | |
402 | * @pdu: packet to parse | |
403 | * @size: size of packet | |
404 | * @type: type of request | |
405 | * @tag: tag of packet | |
406 | * @rewind: set if we need to rewind offset afterwards | |
407 | */ | |
408 | ||
409 | int | |
410 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
411 | int rewind) | |
412 | { | |
413 | int8_t r_type; | |
414 | int16_t r_tag; | |
415 | int32_t r_size; | |
416 | int offset = pdu->offset; | |
417 | int err; | |
418 | ||
419 | pdu->offset = 0; | |
420 | if (pdu->size == 0) | |
421 | pdu->size = 7; | |
422 | ||
423 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
424 | if (err) | |
425 | goto rewind_and_exit; | |
426 | ||
427 | pdu->size = r_size; | |
428 | pdu->id = r_type; | |
429 | pdu->tag = r_tag; | |
430 | ||
e7f4b8f1 EVH |
431 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
432 | pdu->id, pdu->tag); | |
51a87c55 EVH |
433 | |
434 | if (type) | |
435 | *type = r_type; | |
436 | if (tag) | |
437 | *tag = r_tag; | |
438 | if (size) | |
439 | *size = r_size; | |
440 | ||
441 | ||
442 | rewind_and_exit: | |
443 | if (rewind) | |
444 | pdu->offset = offset; | |
445 | return err; | |
446 | } | |
447 | EXPORT_SYMBOL(p9_parse_header); | |
448 | ||
449 | /** | |
450 | * p9_check_errors - check 9p packet for error return and process it | |
451 | * @c: current client instance | |
452 | * @req: request to parse and check for error conditions | |
453 | * | |
454 | * returns error code if one is discovered, otherwise returns 0 | |
455 | * | |
456 | * this will have to be more complicated if we have multiple | |
457 | * error packet types | |
458 | */ | |
459 | ||
460 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
461 | { | |
462 | int8_t type; | |
463 | int err; | |
ca41bb3e | 464 | int ecode; |
51a87c55 EVH |
465 | |
466 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
467 | if (err) { | |
468 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
469 | return err; | |
470 | } | |
471 | ||
ca41bb3e VJJ |
472 | if (type != P9_RERROR && type != P9_RLERROR) |
473 | return 0; | |
4f7ebe80 | 474 | |
ca41bb3e VJJ |
475 | if (!p9_is_proto_dotl(c)) { |
476 | char *ename; | |
ca41bb3e | 477 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e | 478 | &ename, &ecode); |
ca41bb3e VJJ |
479 | if (err) |
480 | goto out_err; | |
4f7ebe80 | 481 | |
ca41bb3e VJJ |
482 | if (p9_is_proto_dotu(c)) |
483 | err = -ecode; | |
4f7ebe80 | 484 | |
ca41bb3e VJJ |
485 | if (!err || !IS_ERR_VALUE(err)) { |
486 | err = p9_errstr2errno(ename, strlen(ename)); | |
4f7ebe80 | 487 | |
abfa034e AK |
488 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
489 | -ecode, ename); | |
4f7ebe80 | 490 | } |
abfa034e | 491 | kfree(ename); |
ca41bb3e VJJ |
492 | } else { |
493 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
494 | err = -ecode; | |
495 | ||
496 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); | |
497 | } | |
51a87c55 | 498 | |
51a87c55 | 499 | return err; |
4f7ebe80 AB |
500 | |
501 | out_err: | |
502 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); | |
503 | ||
504 | return err; | |
51a87c55 EVH |
505 | } |
506 | ||
abfa034e AK |
507 | /** |
508 | * p9_check_zc_errors - check 9p packet for error return and process it | |
509 | * @c: current client instance | |
510 | * @req: request to parse and check for error conditions | |
511 | * @in_hdrlen: Size of response protocol buffer. | |
512 | * | |
513 | * returns error code if one is discovered, otherwise returns 0 | |
514 | * | |
515 | * this will have to be more complicated if we have multiple | |
516 | * error packet types | |
517 | */ | |
518 | ||
519 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, | |
520 | char *uidata, int in_hdrlen, int kern_buf) | |
521 | { | |
522 | int err; | |
523 | int ecode; | |
524 | int8_t type; | |
525 | char *ename = NULL; | |
526 | ||
527 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
528 | if (err) { | |
529 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
530 | return err; | |
531 | } | |
532 | ||
533 | if (type != P9_RERROR && type != P9_RLERROR) | |
534 | return 0; | |
535 | ||
536 | if (!p9_is_proto_dotl(c)) { | |
537 | /* Error is reported in string format */ | |
538 | uint16_t len; | |
539 | /* 7 = header size for RERROR, 2 is the size of string len; */ | |
540 | int inline_len = in_hdrlen - (7 + 2); | |
541 | ||
542 | /* Read the size of error string */ | |
543 | err = p9pdu_readf(req->rc, c->proto_version, "w", &len); | |
544 | if (err) | |
545 | goto out_err; | |
546 | ||
547 | ename = kmalloc(len + 1, GFP_NOFS); | |
548 | if (!ename) { | |
549 | err = -ENOMEM; | |
550 | goto out_err; | |
551 | } | |
552 | if (len <= inline_len) { | |
553 | /* We have error in protocol buffer itself */ | |
554 | if (pdu_read(req->rc, ename, len)) { | |
555 | err = -EFAULT; | |
556 | goto out_free; | |
557 | ||
558 | } | |
559 | } else { | |
560 | /* | |
561 | * Part of the data is in user space buffer. | |
562 | */ | |
563 | if (pdu_read(req->rc, ename, inline_len)) { | |
564 | err = -EFAULT; | |
565 | goto out_free; | |
566 | ||
567 | } | |
568 | if (kern_buf) { | |
569 | memcpy(ename + inline_len, uidata, | |
570 | len - inline_len); | |
571 | } else { | |
572 | err = copy_from_user(ename + inline_len, | |
573 | uidata, len - inline_len); | |
574 | if (err) { | |
575 | err = -EFAULT; | |
576 | goto out_free; | |
577 | } | |
578 | } | |
579 | } | |
580 | ename[len] = 0; | |
581 | if (p9_is_proto_dotu(c)) { | |
582 | /* For dotu we also have error code */ | |
583 | err = p9pdu_readf(req->rc, | |
584 | c->proto_version, "d", &ecode); | |
585 | if (err) | |
586 | goto out_free; | |
587 | err = -ecode; | |
588 | } | |
589 | if (!err || !IS_ERR_VALUE(err)) { | |
590 | err = p9_errstr2errno(ename, strlen(ename)); | |
591 | ||
592 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", | |
593 | -ecode, ename); | |
594 | } | |
595 | kfree(ename); | |
596 | } else { | |
597 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
598 | err = -ecode; | |
599 | ||
600 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); | |
601 | } | |
602 | return err; | |
603 | ||
604 | out_free: | |
605 | kfree(ename); | |
606 | out_err: | |
607 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); | |
608 | return err; | |
609 | } | |
610 | ||
aca00763 RL |
611 | static struct p9_req_t * |
612 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
613 | ||
51a87c55 EVH |
614 | /** |
615 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
616 | * @c: client state |
617 | * @oldreq: request to cancel | |
51a87c55 | 618 | * |
aca00763 | 619 | * This sents a flush for a particular request and links |
51a87c55 EVH |
620 | * the flush request to the original request. The current |
621 | * code only supports a single flush request although the protocol | |
622 | * allows for multiple flush requests to be sent for a single request. | |
623 | * | |
624 | */ | |
625 | ||
626 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
627 | { | |
628 | struct p9_req_t *req; | |
629 | int16_t oldtag; | |
630 | int err; | |
631 | ||
632 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
633 | if (err) | |
634 | return err; | |
635 | ||
636 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
637 | ||
638 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
639 | if (IS_ERR(req)) | |
640 | return PTR_ERR(req); | |
641 | ||
51a87c55 | 642 | |
1bab88b2 LI |
643 | /* if we haven't received a response for oldreq, |
644 | remove it from the list. */ | |
645 | spin_lock(&c->lock); | |
646 | if (oldreq->status == REQ_STATUS_FLSH) | |
647 | list_del(&oldreq->req_list); | |
648 | spin_unlock(&c->lock); | |
649 | ||
650 | p9_free_req(c, req); | |
51a87c55 EVH |
651 | return 0; |
652 | } | |
653 | ||
abfa034e AK |
654 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
655 | int8_t type, int req_size, | |
656 | const char *fmt, va_list ap) | |
91b8534f | 657 | { |
51a87c55 | 658 | int tag, err; |
91b8534f | 659 | struct p9_req_t *req; |
91b8534f | 660 | |
51a87c55 | 661 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 662 | |
6d96d3ab AK |
663 | /* we allow for any status other than disconnected */ |
664 | if (c->status == Disconnected) | |
665 | return ERR_PTR(-EIO); | |
666 | ||
667 | /* if status is begin_disconnected we allow only clunk request */ | |
668 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 669 | return ERR_PTR(-EIO); |
91b8534f | 670 | |
91b8534f | 671 | tag = P9_NOTAG; |
51a87c55 | 672 | if (type != P9_TVERSION) { |
91b8534f EVH |
673 | tag = p9_idpool_get(c->tagpool); |
674 | if (tag < 0) | |
51a87c55 | 675 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
676 | } |
677 | ||
abfa034e | 678 | req = p9_tag_alloc(c, tag, req_size); |
51a87c55 EVH |
679 | if (IS_ERR(req)) |
680 | return req; | |
91b8534f | 681 | |
51a87c55 EVH |
682 | /* marshall the data */ |
683 | p9pdu_prepare(req->tc, tag, type); | |
342fee1d | 684 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe AK |
685 | if (err) |
686 | goto reterr; | |
51a87c55 | 687 | p9pdu_finalize(req->tc); |
abfa034e AK |
688 | return req; |
689 | reterr: | |
690 | p9_free_req(c, req); | |
691 | return ERR_PTR(err); | |
692 | } | |
693 | ||
694 | /** | |
695 | * p9_client_rpc - issue a request and wait for a response | |
696 | * @c: client session | |
697 | * @type: type of request | |
698 | * @fmt: protocol format string (see protocol.c) | |
699 | * | |
700 | * Returns request structure (which client must free using p9_free_req) | |
701 | */ | |
702 | ||
703 | static struct p9_req_t * | |
704 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
705 | { | |
706 | va_list ap; | |
707 | int sigpending, err; | |
708 | unsigned long flags; | |
709 | struct p9_req_t *req; | |
710 | ||
711 | va_start(ap, fmt); | |
712 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); | |
713 | va_end(ap); | |
714 | if (IS_ERR(req)) | |
715 | return req; | |
716 | ||
717 | if (signal_pending(current)) { | |
718 | sigpending = 1; | |
719 | clear_thread_flag(TIF_SIGPENDING); | |
720 | } else | |
721 | sigpending = 0; | |
91b8534f EVH |
722 | |
723 | err = c->trans_mod->request(c, req); | |
724 | if (err < 0) { | |
3cd79678 | 725 | if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d | 726 | c->status = Disconnected; |
91b8534f EVH |
727 | goto reterr; |
728 | } | |
abfa034e | 729 | /* Wait for the response */ |
91b8534f | 730 | err = wait_event_interruptible(*req->wq, |
abfa034e | 731 | req->status >= REQ_STATUS_RCVD); |
91b8534f EVH |
732 | |
733 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 734 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 735 | err = req->t_err; |
91b8534f | 736 | } |
1bab88b2 | 737 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
51a87c55 | 738 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 739 | sigpending = 1; |
91b8534f EVH |
740 | clear_thread_flag(TIF_SIGPENDING); |
741 | ||
1bab88b2 LI |
742 | if (c->trans_mod->cancel(c, req)) |
743 | p9_client_flush(c, req); | |
744 | ||
745 | /* if we received the response anyway, don't signal error */ | |
746 | if (req->status == REQ_STATUS_RCVD) | |
747 | err = 0; | |
91b8534f | 748 | } |
91b8534f EVH |
749 | if (sigpending) { |
750 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
751 | recalc_sigpending(); | |
752 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
753 | } | |
91b8534f EVH |
754 | if (err < 0) |
755 | goto reterr; | |
756 | ||
51a87c55 EVH |
757 | err = p9_check_errors(c, req); |
758 | if (!err) { | |
759 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
760 | return req; | |
91b8534f | 761 | } |
abfa034e AK |
762 | reterr: |
763 | P9_DPRINTK(P9_DEBUG_MUX, | |
764 | "exit: client %p op %d error: %d\n", c, type, err); | |
765 | p9_free_req(c, req); | |
766 | return ERR_PTR(err); | |
767 | } | |
768 | ||
769 | /** | |
770 | * p9_client_zc_rpc - issue a request and wait for a response | |
771 | * @c: client session | |
772 | * @type: type of request | |
773 | * @uidata: user bffer that should be ued for zero copy read | |
774 | * @uodata: user buffer that shoud be user for zero copy write | |
775 | * @inlen: read buffer size | |
776 | * @olen: write buffer size | |
777 | * @hdrlen: reader header size, This is the size of response protocol data | |
778 | * @fmt: protocol format string (see protocol.c) | |
779 | * | |
780 | * Returns request structure (which client must free using p9_free_req) | |
781 | */ | |
782 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, | |
783 | char *uidata, char *uodata, | |
784 | int inlen, int olen, int in_hdrlen, | |
785 | int kern_buf, const char *fmt, ...) | |
786 | { | |
787 | va_list ap; | |
788 | int sigpending, err; | |
789 | unsigned long flags; | |
790 | struct p9_req_t *req; | |
791 | ||
792 | va_start(ap, fmt); | |
793 | /* | |
794 | * We allocate a inline protocol data of only 4k bytes. | |
795 | * The actual content is passed in zero-copy fashion. | |
796 | */ | |
797 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); | |
798 | va_end(ap); | |
799 | if (IS_ERR(req)) | |
800 | return req; | |
801 | ||
802 | if (signal_pending(current)) { | |
803 | sigpending = 1; | |
804 | clear_thread_flag(TIF_SIGPENDING); | |
805 | } else | |
806 | sigpending = 0; | |
807 | ||
808 | /* If we are called with KERNEL_DS force kern_buf */ | |
809 | if (segment_eq(get_fs(), KERNEL_DS)) | |
810 | kern_buf = 1; | |
811 | ||
812 | err = c->trans_mod->zc_request(c, req, uidata, uodata, | |
813 | inlen, olen, in_hdrlen, kern_buf); | |
814 | if (err < 0) { | |
815 | if (err == -EIO) | |
816 | c->status = Disconnected; | |
817 | goto reterr; | |
818 | } | |
819 | if (req->status == REQ_STATUS_ERROR) { | |
820 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); | |
821 | err = req->t_err; | |
822 | } | |
823 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
824 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); | |
825 | sigpending = 1; | |
826 | clear_thread_flag(TIF_SIGPENDING); | |
91b8534f | 827 | |
abfa034e AK |
828 | if (c->trans_mod->cancel(c, req)) |
829 | p9_client_flush(c, req); | |
830 | ||
831 | /* if we received the response anyway, don't signal error */ | |
832 | if (req->status == REQ_STATUS_RCVD) | |
833 | err = 0; | |
834 | } | |
835 | if (sigpending) { | |
836 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
837 | recalc_sigpending(); | |
838 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
839 | } | |
840 | if (err < 0) | |
841 | goto reterr; | |
842 | ||
843 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf); | |
844 | if (!err) { | |
845 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); | |
846 | return req; | |
847 | } | |
91b8534f | 848 | reterr: |
51a87c55 EVH |
849 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
850 | err); | |
91b8534f | 851 | p9_free_req(c, req); |
51a87c55 | 852 | return ERR_PTR(err); |
91b8534f EVH |
853 | } |
854 | ||
5503ac56 EVH |
855 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
856 | { | |
9f3e9bbe | 857 | int ret; |
5503ac56 | 858 | struct p9_fid *fid; |
cac23d65 | 859 | unsigned long flags; |
5503ac56 | 860 | |
51a87c55 | 861 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
862 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
863 | if (!fid) | |
864 | return ERR_PTR(-ENOMEM); | |
865 | ||
9f3e9bbe | 866 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 867 | if (ret < 0) { |
9f3e9bbe | 868 | ret = -ENOSPC; |
5503ac56 EVH |
869 | goto error; |
870 | } | |
9f3e9bbe | 871 | fid->fid = ret; |
5503ac56 EVH |
872 | |
873 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
874 | fid->mode = -1; | |
f8b9d53a | 875 | fid->uid = current_fsuid(); |
5503ac56 | 876 | fid->clnt = clnt; |
3e2796a9 | 877 | fid->rdir = NULL; |
cac23d65 | 878 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 879 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 880 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
881 | |
882 | return fid; | |
883 | ||
884 | error: | |
885 | kfree(fid); | |
9f3e9bbe | 886 | return ERR_PTR(ret); |
5503ac56 EVH |
887 | } |
888 | ||
889 | static void p9_fid_destroy(struct p9_fid *fid) | |
890 | { | |
891 | struct p9_client *clnt; | |
cac23d65 | 892 | unsigned long flags; |
5503ac56 | 893 | |
51a87c55 | 894 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
895 | clnt = fid->clnt; |
896 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 897 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 898 | list_del(&fid->flist); |
cac23d65 | 899 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 900 | kfree(fid->rdir); |
5503ac56 EVH |
901 | kfree(fid); |
902 | } | |
8a0dc95f | 903 | |
32a875ad | 904 | static int p9_client_version(struct p9_client *c) |
bd238fb4 | 905 | { |
6936bf60 | 906 | int err = 0; |
51a87c55 EVH |
907 | struct p9_req_t *req; |
908 | char *version; | |
909 | int msize; | |
bd238fb4 | 910 | |
342fee1d SK |
911 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
912 | c->msize, c->proto_version); | |
c5a7697d SK |
913 | |
914 | switch (c->proto_version) { | |
45bc21ed | 915 | case p9_proto_2000L: |
c5a7697d | 916 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 917 | c->msize, "9P2000.L"); |
c5a7697d SK |
918 | break; |
919 | case p9_proto_2000u: | |
920 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
921 | c->msize, "9P2000.u"); | |
922 | break; | |
923 | case p9_proto_legacy: | |
924 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
925 | c->msize, "9P2000"); | |
926 | break; | |
927 | default: | |
928 | return -EINVAL; | |
929 | break; | |
930 | } | |
931 | ||
51a87c55 EVH |
932 | if (IS_ERR(req)) |
933 | return PTR_ERR(req); | |
6936bf60 | 934 | |
342fee1d | 935 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 EVH |
936 | if (err) { |
937 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
e660a828 | 938 | P9_DUMP_PKT(1, req->rc); |
6936bf60 | 939 | goto error; |
51a87c55 | 940 | } |
6936bf60 | 941 | |
51a87c55 | 942 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
943 | if (!strncmp(version, "9P2000.L", 8)) |
944 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 945 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
946 | c->proto_version = p9_proto_2000u; |
947 | else if (!strncmp(version, "9P2000", 6)) | |
948 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
949 | else { |
950 | err = -EREMOTEIO; | |
951 | goto error; | |
952 | } | |
953 | ||
51a87c55 EVH |
954 | if (msize < c->msize) |
955 | c->msize = msize; | |
6936bf60 EVH |
956 | |
957 | error: | |
51a87c55 EVH |
958 | kfree(version); |
959 | p9_free_req(c, req); | |
6936bf60 EVH |
960 | |
961 | return err; | |
962 | } | |
6936bf60 EVH |
963 | |
964 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
965 | { | |
966 | int err; | |
967 | struct p9_client *clnt; | |
968 | ||
969 | err = 0; | |
bd238fb4 LI |
970 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
971 | if (!clnt) | |
972 | return ERR_PTR(-ENOMEM); | |
973 | ||
72029fe8 | 974 | clnt->trans_mod = NULL; |
bb8ffdfc | 975 | clnt->trans = NULL; |
bd238fb4 | 976 | spin_lock_init(&clnt->lock); |
bd238fb4 | 977 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 978 | |
fe1cbaba AK |
979 | err = p9_tag_init(clnt); |
980 | if (err < 0) | |
981 | goto free_client; | |
fea511a6 | 982 | |
bb8ffdfc EVH |
983 | err = parse_opts(options, clnt); |
984 | if (err < 0) | |
fe1cbaba | 985 | goto destroy_tagpool; |
bb8ffdfc | 986 | |
a17d1720 AK |
987 | if (!clnt->trans_mod) |
988 | clnt->trans_mod = v9fs_get_default_trans(); | |
989 | ||
8a0dc95f EVH |
990 | if (clnt->trans_mod == NULL) { |
991 | err = -EPROTONOSUPPORT; | |
992 | P9_DPRINTK(P9_DEBUG_ERROR, | |
993 | "No transport defined or default transport\n"); | |
fe1cbaba | 994 | goto destroy_tagpool; |
8781ff94 EVH |
995 | } |
996 | ||
997 | clnt->fidpool = p9_idpool_create(); | |
998 | if (IS_ERR(clnt->fidpool)) { | |
999 | err = PTR_ERR(clnt->fidpool); | |
8781ff94 | 1000 | goto put_trans; |
8a0dc95f EVH |
1001 | } |
1002 | ||
342fee1d SK |
1003 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
1004 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 1005 | |
8b81ef58 EVH |
1006 | err = clnt->trans_mod->create(clnt, dev_name, options); |
1007 | if (err) | |
8781ff94 | 1008 | goto destroy_fidpool; |
bd238fb4 | 1009 | |
c9ffb05c VJJ |
1010 | if (clnt->msize > clnt->trans_mod->maxsize) |
1011 | clnt->msize = clnt->trans_mod->maxsize; | |
8a0dc95f | 1012 | |
6936bf60 | 1013 | err = p9_client_version(clnt); |
bd238fb4 | 1014 | if (err) |
8781ff94 | 1015 | goto close_trans; |
bd238fb4 | 1016 | |
bd238fb4 LI |
1017 | return clnt; |
1018 | ||
8781ff94 EVH |
1019 | close_trans: |
1020 | clnt->trans_mod->close(clnt); | |
1021 | destroy_fidpool: | |
1022 | p9_idpool_destroy(clnt->fidpool); | |
1023 | put_trans: | |
1024 | v9fs_put_trans(clnt->trans_mod); | |
fe1cbaba AK |
1025 | destroy_tagpool: |
1026 | p9_idpool_destroy(clnt->tagpool); | |
8781ff94 EVH |
1027 | free_client: |
1028 | kfree(clnt); | |
bd238fb4 LI |
1029 | return ERR_PTR(err); |
1030 | } | |
1031 | EXPORT_SYMBOL(p9_client_create); | |
1032 | ||
1033 | void p9_client_destroy(struct p9_client *clnt) | |
1034 | { | |
1035 | struct p9_fid *fid, *fidptr; | |
1036 | ||
51a87c55 | 1037 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 1038 | |
8b81ef58 EVH |
1039 | if (clnt->trans_mod) |
1040 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 1041 | |
72029fe8 TH |
1042 | v9fs_put_trans(clnt->trans_mod); |
1043 | ||
6d96d3ab AK |
1044 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
1045 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); | |
bd238fb4 | 1046 | p9_fid_destroy(fid); |
6d96d3ab | 1047 | } |
bd238fb4 | 1048 | |
0af8887e EVH |
1049 | if (clnt->fidpool) |
1050 | p9_idpool_destroy(clnt->fidpool); | |
1051 | ||
fea511a6 EVH |
1052 | p9_tag_cleanup(clnt); |
1053 | ||
bd238fb4 LI |
1054 | kfree(clnt); |
1055 | } | |
1056 | EXPORT_SYMBOL(p9_client_destroy); | |
1057 | ||
1058 | void p9_client_disconnect(struct p9_client *clnt) | |
1059 | { | |
1060 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 1061 | clnt->status = Disconnected; |
bd238fb4 LI |
1062 | } |
1063 | EXPORT_SYMBOL(p9_client_disconnect); | |
1064 | ||
6d96d3ab AK |
1065 | void p9_client_begin_disconnect(struct p9_client *clnt) |
1066 | { | |
1067 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
1068 | clnt->status = BeginDisconnect; | |
1069 | } | |
1070 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
1071 | ||
bd238fb4 | 1072 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
ba17674f | 1073 | char *uname, u32 n_uname, char *aname) |
bd238fb4 LI |
1074 | { |
1075 | int err; | |
51a87c55 | 1076 | struct p9_req_t *req; |
bd238fb4 | 1077 | struct p9_fid *fid; |
51a87c55 | 1078 | struct p9_qid qid; |
bd238fb4 | 1079 | |
51a87c55 EVH |
1080 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
1081 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 | 1082 | err = 0; |
bd238fb4 LI |
1083 | |
1084 | fid = p9_fid_create(clnt); | |
1085 | if (IS_ERR(fid)) { | |
1086 | err = PTR_ERR(fid); | |
1087 | fid = NULL; | |
1088 | goto error; | |
1089 | } | |
1090 | ||
51a87c55 EVH |
1091 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
1092 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
1093 | if (IS_ERR(req)) { | |
1094 | err = PTR_ERR(req); | |
bd238fb4 LI |
1095 | goto error; |
1096 | } | |
1097 | ||
342fee1d | 1098 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 1099 | if (err) { |
e660a828 | 1100 | P9_DUMP_PKT(1, req->rc); |
51a87c55 | 1101 | p9_free_req(clnt, req); |
bd238fb4 | 1102 | goto error; |
51a87c55 | 1103 | } |
bd238fb4 | 1104 | |
51a87c55 | 1105 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
1106 | qid.type, |
1107 | (unsigned long long)qid.path, | |
1108 | qid.version); | |
51a87c55 EVH |
1109 | |
1110 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
1111 | ||
1112 | p9_free_req(clnt, req); | |
bd238fb4 LI |
1113 | return fid; |
1114 | ||
1115 | error: | |
bd238fb4 LI |
1116 | if (fid) |
1117 | p9_fid_destroy(fid); | |
1118 | return ERR_PTR(err); | |
1119 | } | |
1120 | EXPORT_SYMBOL(p9_client_attach); | |
1121 | ||
b76225e2 HPB |
1122 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
1123 | char **wnames, int clone) | |
bd238fb4 LI |
1124 | { |
1125 | int err; | |
bd238fb4 LI |
1126 | struct p9_client *clnt; |
1127 | struct p9_fid *fid; | |
51a87c55 EVH |
1128 | struct p9_qid *wqids; |
1129 | struct p9_req_t *req; | |
b76225e2 | 1130 | uint16_t nwqids, count; |
bd238fb4 | 1131 | |
bd238fb4 | 1132 | err = 0; |
62b2be59 | 1133 | wqids = NULL; |
bd238fb4 LI |
1134 | clnt = oldfid->clnt; |
1135 | if (clone) { | |
1136 | fid = p9_fid_create(clnt); | |
1137 | if (IS_ERR(fid)) { | |
1138 | err = PTR_ERR(fid); | |
1139 | fid = NULL; | |
1140 | goto error; | |
1141 | } | |
1142 | ||
1143 | fid->uid = oldfid->uid; | |
1144 | } else | |
1145 | fid = oldfid; | |
1146 | ||
51a87c55 | 1147 | |
b76225e2 | 1148 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
51a87c55 EVH |
1149 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
1150 | ||
1151 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
1152 | nwname, wnames); | |
1153 | if (IS_ERR(req)) { | |
1154 | err = PTR_ERR(req); | |
bd238fb4 LI |
1155 | goto error; |
1156 | } | |
1157 | ||
342fee1d | 1158 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 | 1159 | if (err) { |
e660a828 | 1160 | P9_DUMP_PKT(1, req->rc); |
e7f4b8f1 | 1161 | p9_free_req(clnt, req); |
51a87c55 | 1162 | goto clunk_fid; |
e7f4b8f1 EVH |
1163 | } |
1164 | p9_free_req(clnt, req); | |
bd238fb4 | 1165 | |
51a87c55 EVH |
1166 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
1167 | ||
1168 | if (nwqids != nwname) { | |
bd238fb4 LI |
1169 | err = -ENOENT; |
1170 | goto clunk_fid; | |
1171 | } | |
1172 | ||
51a87c55 EVH |
1173 | for (count = 0; count < nwqids; count++) |
1174 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
1175 | count, wqids[count].type, |
1176 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
1177 | wqids[count].version); |
1178 | ||
bd238fb4 | 1179 | if (nwname) |
51a87c55 | 1180 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
1181 | else |
1182 | fid->qid = oldfid->qid; | |
1183 | ||
62b2be59 | 1184 | kfree(wqids); |
bd238fb4 LI |
1185 | return fid; |
1186 | ||
1187 | clunk_fid: | |
62b2be59 | 1188 | kfree(wqids); |
51a87c55 EVH |
1189 | p9_client_clunk(fid); |
1190 | fid = NULL; | |
bd238fb4 LI |
1191 | |
1192 | error: | |
bd238fb4 LI |
1193 | if (fid && (fid != oldfid)) |
1194 | p9_fid_destroy(fid); | |
1195 | ||
1196 | return ERR_PTR(err); | |
1197 | } | |
1198 | EXPORT_SYMBOL(p9_client_walk); | |
1199 | ||
1200 | int p9_client_open(struct p9_fid *fid, int mode) | |
1201 | { | |
1202 | int err; | |
bd238fb4 | 1203 | struct p9_client *clnt; |
51a87c55 EVH |
1204 | struct p9_req_t *req; |
1205 | struct p9_qid qid; | |
1206 | int iounit; | |
bd238fb4 | 1207 | |
bd238fb4 | 1208 | clnt = fid->clnt; |
ef56547e MK |
1209 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
1210 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); | |
1211 | err = 0; | |
bd238fb4 LI |
1212 | |
1213 | if (fid->mode != -1) | |
1214 | return -EINVAL; | |
1215 | ||
ef56547e MK |
1216 | if (p9_is_proto_dotl(clnt)) |
1217 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1218 | else | |
1219 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1220 | if (IS_ERR(req)) { |
1221 | err = PTR_ERR(req); | |
1222 | goto error; | |
bd238fb4 LI |
1223 | } |
1224 | ||
342fee1d | 1225 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1226 | if (err) { |
e660a828 | 1227 | P9_DUMP_PKT(1, req->rc); |
e7f4b8f1 EVH |
1228 | goto free_and_error; |
1229 | } | |
51a87c55 | 1230 | |
ef56547e MK |
1231 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
1232 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, | |
1233 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1234 | |
1235 | fid->mode = mode; | |
51a87c55 | 1236 | fid->iounit = iounit; |
bd238fb4 | 1237 | |
e7f4b8f1 EVH |
1238 | free_and_error: |
1239 | p9_free_req(clnt, req); | |
51a87c55 | 1240 | error: |
bd238fb4 LI |
1241 | return err; |
1242 | } | |
1243 | EXPORT_SYMBOL(p9_client_open); | |
1244 | ||
5643135a VJJ |
1245 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
1246 | gid_t gid, struct p9_qid *qid) | |
1247 | { | |
1248 | int err = 0; | |
1249 | struct p9_client *clnt; | |
1250 | struct p9_req_t *req; | |
1251 | int iounit; | |
1252 | ||
1253 | P9_DPRINTK(P9_DEBUG_9P, | |
1254 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", | |
1255 | ofid->fid, name, flags, mode, gid); | |
1256 | clnt = ofid->clnt; | |
1257 | ||
1258 | if (ofid->mode != -1) | |
1259 | return -EINVAL; | |
1260 | ||
1261 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, | |
1262 | mode, gid); | |
1263 | if (IS_ERR(req)) { | |
1264 | err = PTR_ERR(req); | |
1265 | goto error; | |
1266 | } | |
1267 | ||
1268 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1269 | if (err) { | |
e660a828 | 1270 | P9_DUMP_PKT(1, req->rc); |
5643135a VJJ |
1271 | goto free_and_error; |
1272 | } | |
1273 | ||
1274 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", | |
1275 | qid->type, | |
1276 | (unsigned long long)qid->path, | |
1277 | qid->version, iounit); | |
1278 | ||
1279 | ofid->mode = mode; | |
1280 | ofid->iounit = iounit; | |
1281 | ||
1282 | free_and_error: | |
1283 | p9_free_req(clnt, req); | |
1284 | error: | |
1285 | return err; | |
1286 | } | |
1287 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1288 | ||
bd238fb4 LI |
1289 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1290 | char *extension) | |
1291 | { | |
1292 | int err; | |
bd238fb4 | 1293 | struct p9_client *clnt; |
51a87c55 EVH |
1294 | struct p9_req_t *req; |
1295 | struct p9_qid qid; | |
1296 | int iounit; | |
bd238fb4 | 1297 | |
51a87c55 EVH |
1298 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1299 | fid->fid, name, perm, mode); | |
bd238fb4 | 1300 | err = 0; |
bd238fb4 LI |
1301 | clnt = fid->clnt; |
1302 | ||
1303 | if (fid->mode != -1) | |
1304 | return -EINVAL; | |
1305 | ||
51a87c55 EVH |
1306 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1307 | mode, extension); | |
1308 | if (IS_ERR(req)) { | |
1309 | err = PTR_ERR(req); | |
1310 | goto error; | |
bd238fb4 LI |
1311 | } |
1312 | ||
342fee1d | 1313 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1314 | if (err) { |
e660a828 | 1315 | P9_DUMP_PKT(1, req->rc); |
e7f4b8f1 EVH |
1316 | goto free_and_error; |
1317 | } | |
51a87c55 EVH |
1318 | |
1319 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1320 | qid.type, |
1321 | (unsigned long long)qid.path, | |
1322 | qid.version, iounit); | |
bd238fb4 LI |
1323 | |
1324 | fid->mode = mode; | |
51a87c55 | 1325 | fid->iounit = iounit; |
bd238fb4 | 1326 | |
e7f4b8f1 EVH |
1327 | free_and_error: |
1328 | p9_free_req(clnt, req); | |
51a87c55 | 1329 | error: |
bd238fb4 LI |
1330 | return err; |
1331 | } | |
1332 | EXPORT_SYMBOL(p9_client_fcreate); | |
1333 | ||
50cc42ff VJJ |
1334 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
1335 | struct p9_qid *qid) | |
1336 | { | |
1337 | int err = 0; | |
1338 | struct p9_client *clnt; | |
1339 | struct p9_req_t *req; | |
1340 | ||
1341 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", | |
1342 | dfid->fid, name, symtgt); | |
1343 | clnt = dfid->clnt; | |
1344 | ||
1345 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, | |
1346 | gid); | |
1347 | if (IS_ERR(req)) { | |
1348 | err = PTR_ERR(req); | |
1349 | goto error; | |
1350 | } | |
1351 | ||
1352 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1353 | if (err) { | |
e660a828 | 1354 | P9_DUMP_PKT(1, req->rc); |
50cc42ff VJJ |
1355 | goto free_and_error; |
1356 | } | |
1357 | ||
1358 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", | |
1359 | qid->type, (unsigned long long)qid->path, qid->version); | |
1360 | ||
1361 | free_and_error: | |
1362 | p9_free_req(clnt, req); | |
1363 | error: | |
1364 | return err; | |
1365 | } | |
1366 | EXPORT_SYMBOL(p9_client_symlink); | |
1367 | ||
652df9a7 VJJ |
1368 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1369 | { | |
1370 | struct p9_client *clnt; | |
1371 | struct p9_req_t *req; | |
1372 | ||
1373 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", | |
1374 | dfid->fid, oldfid->fid, newname); | |
1375 | clnt = dfid->clnt; | |
1376 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1377 | newname); | |
1378 | if (IS_ERR(req)) | |
1379 | return PTR_ERR(req); | |
1380 | ||
1381 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); | |
1382 | p9_free_req(clnt, req); | |
1383 | return 0; | |
1384 | } | |
1385 | EXPORT_SYMBOL(p9_client_link); | |
1386 | ||
b165d601 | 1387 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc VJJ |
1388 | { |
1389 | int err; | |
1390 | struct p9_client *clnt; | |
1391 | struct p9_req_t *req; | |
1392 | ||
b165d601 VJJ |
1393 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
1394 | fid->fid, datasync); | |
920e65dc VJJ |
1395 | err = 0; |
1396 | clnt = fid->clnt; | |
1397 | ||
b165d601 | 1398 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc VJJ |
1399 | if (IS_ERR(req)) { |
1400 | err = PTR_ERR(req); | |
1401 | goto error; | |
1402 | } | |
1403 | ||
1404 | P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); | |
1405 | ||
1406 | p9_free_req(clnt, req); | |
1407 | ||
1408 | error: | |
1409 | return err; | |
1410 | } | |
1411 | EXPORT_SYMBOL(p9_client_fsync); | |
1412 | ||
bd238fb4 LI |
1413 | int p9_client_clunk(struct p9_fid *fid) |
1414 | { | |
1415 | int err; | |
bd238fb4 | 1416 | struct p9_client *clnt; |
51a87c55 | 1417 | struct p9_req_t *req; |
bd238fb4 | 1418 | |
8e44a080 | 1419 | if (!fid) { |
1420 | P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); | |
1421 | dump_stack(); | |
1422 | return 0; | |
1423 | } | |
1424 | ||
51a87c55 | 1425 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1426 | err = 0; |
bd238fb4 LI |
1427 | clnt = fid->clnt; |
1428 | ||
51a87c55 EVH |
1429 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1430 | if (IS_ERR(req)) { | |
1431 | err = PTR_ERR(req); | |
1432 | goto error; | |
bd238fb4 LI |
1433 | } |
1434 | ||
51a87c55 | 1435 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1436 | |
51a87c55 | 1437 | p9_free_req(clnt, req); |
51a87c55 | 1438 | error: |
5034990e AK |
1439 | /* |
1440 | * Fid is not valid even after a failed clunk | |
1441 | */ | |
1442 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1443 | return err; |
1444 | } | |
1445 | EXPORT_SYMBOL(p9_client_clunk); | |
1446 | ||
1447 | int p9_client_remove(struct p9_fid *fid) | |
1448 | { | |
1449 | int err; | |
bd238fb4 | 1450 | struct p9_client *clnt; |
51a87c55 | 1451 | struct p9_req_t *req; |
bd238fb4 | 1452 | |
51a87c55 | 1453 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1454 | err = 0; |
bd238fb4 LI |
1455 | clnt = fid->clnt; |
1456 | ||
51a87c55 EVH |
1457 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1458 | if (IS_ERR(req)) { | |
1459 | err = PTR_ERR(req); | |
1460 | goto error; | |
bd238fb4 LI |
1461 | } |
1462 | ||
51a87c55 | 1463 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1464 | |
51a87c55 | 1465 | p9_free_req(clnt, req); |
51a87c55 | 1466 | error: |
0b1208b1 | 1467 | p9_fid_destroy(fid); |
bd238fb4 LI |
1468 | return err; |
1469 | } | |
1470 | EXPORT_SYMBOL(p9_client_remove); | |
1471 | ||
48e370ff AK |
1472 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
1473 | { | |
1474 | int err = 0; | |
1475 | struct p9_req_t *req; | |
1476 | struct p9_client *clnt; | |
1477 | ||
1478 | P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", | |
1479 | dfid->fid, name, flags); | |
1480 | ||
1481 | clnt = dfid->clnt; | |
1482 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); | |
1483 | if (IS_ERR(req)) { | |
1484 | err = PTR_ERR(req); | |
1485 | goto error; | |
1486 | } | |
1487 | P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); | |
1488 | ||
1489 | p9_free_req(clnt, req); | |
1490 | error: | |
1491 | return err; | |
1492 | } | |
1493 | EXPORT_SYMBOL(p9_client_unlinkat); | |
1494 | ||
0fc9655e EVH |
1495 | int |
1496 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1497 | u32 count) | |
bd238fb4 | 1498 | { |
51a87c55 | 1499 | char *dataptr; |
abfa034e AK |
1500 | int kernel_buf = 0; |
1501 | struct p9_req_t *req; | |
1502 | struct p9_client *clnt; | |
1503 | int err, rsize, non_zc = 0; | |
1504 | ||
bd238fb4 | 1505 | |
abfa034e AK |
1506 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
1507 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1508 | err = 0; |
bd238fb4 | 1509 | clnt = fid->clnt; |
bd238fb4 LI |
1510 | |
1511 | rsize = fid->iounit; | |
1512 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1513 | rsize = clnt->msize - P9_IOHDRSZ; | |
1514 | ||
51a87c55 EVH |
1515 | if (count < rsize) |
1516 | rsize = count; | |
bd238fb4 | 1517 | |
aca00763 | 1518 | /* Don't bother zerocopy for small IO (< 1024) */ |
abfa034e AK |
1519 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
1520 | char *indata; | |
1521 | if (data) { | |
1522 | kernel_buf = 1; | |
1523 | indata = data; | |
1524 | } else | |
1525 | indata = (char *)udata; | |
1526 | /* | |
1527 | * response header len is 11 | |
1528 | * PDU Header(7) + IO Size (4) | |
1529 | */ | |
1530 | req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0, | |
1531 | 11, kernel_buf, "dqd", fid->fid, | |
1532 | offset, rsize); | |
bb2f8a55 | 1533 | } else { |
abfa034e | 1534 | non_zc = 1; |
bb2f8a55 | 1535 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, |
abfa034e | 1536 | rsize); |
bb2f8a55 | 1537 | } |
51a87c55 EVH |
1538 | if (IS_ERR(req)) { |
1539 | err = PTR_ERR(req); | |
1540 | goto error; | |
1541 | } | |
bd238fb4 | 1542 | |
342fee1d | 1543 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 | 1544 | if (err) { |
e660a828 | 1545 | P9_DUMP_PKT(1, req->rc); |
51a87c55 | 1546 | goto free_and_error; |
e7f4b8f1 | 1547 | } |
bd238fb4 | 1548 | |
51a87c55 | 1549 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
e660a828 | 1550 | P9_DUMP_PKT(1, req->rc); |
bd238fb4 | 1551 | |
abfa034e | 1552 | if (non_zc) { |
bb2f8a55 VJJ |
1553 | if (data) { |
1554 | memmove(data, dataptr, count); | |
1555 | } else { | |
1556 | err = copy_to_user(udata, dataptr, count); | |
1557 | if (err) { | |
1558 | err = -EFAULT; | |
1559 | goto free_and_error; | |
1560 | } | |
bd238fb4 | 1561 | } |
51a87c55 | 1562 | } |
51a87c55 EVH |
1563 | p9_free_req(clnt, req); |
1564 | return count; | |
bd238fb4 | 1565 | |
51a87c55 EVH |
1566 | free_and_error: |
1567 | p9_free_req(clnt, req); | |
bd238fb4 | 1568 | error: |
bd238fb4 LI |
1569 | return err; |
1570 | } | |
0fc9655e | 1571 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1572 | |
1573 | int | |
0fc9655e EVH |
1574 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1575 | u64 offset, u32 count) | |
bd238fb4 | 1576 | { |
095d3da6 | 1577 | int err, rsize; |
abfa034e | 1578 | int kernel_buf = 0; |
bd238fb4 | 1579 | struct p9_client *clnt; |
51a87c55 | 1580 | struct p9_req_t *req; |
bd238fb4 | 1581 | |
51a87c55 EVH |
1582 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1583 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1584 | err = 0; |
bd238fb4 | 1585 | clnt = fid->clnt; |
bd238fb4 LI |
1586 | |
1587 | rsize = fid->iounit; | |
1588 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1589 | rsize = clnt->msize - P9_IOHDRSZ; | |
1590 | ||
51a87c55 EVH |
1591 | if (count < rsize) |
1592 | rsize = count; | |
1fc52481 | 1593 | |
abfa034e AK |
1594 | /* Don't bother zerocopy for small IO (< 1024) */ |
1595 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1596 | char *odata; | |
1597 | if (data) { | |
1598 | kernel_buf = 1; | |
1599 | odata = data; | |
1600 | } else | |
1601 | odata = (char *)udata; | |
1602 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize, | |
1603 | P9_ZC_HDR_SZ, kernel_buf, "dqd", | |
1604 | fid->fid, offset, rsize); | |
1fc52481 | 1605 | } else { |
1fc52481 VJJ |
1606 | if (data) |
1607 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, | |
abfa034e | 1608 | offset, rsize, data); |
1fc52481 VJJ |
1609 | else |
1610 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, | |
abfa034e | 1611 | offset, rsize, udata); |
1fc52481 | 1612 | } |
51a87c55 EVH |
1613 | if (IS_ERR(req)) { |
1614 | err = PTR_ERR(req); | |
1615 | goto error; | |
1616 | } | |
0fc9655e | 1617 | |
342fee1d | 1618 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 | 1619 | if (err) { |
e660a828 | 1620 | P9_DUMP_PKT(1, req->rc); |
51a87c55 | 1621 | goto free_and_error; |
e7f4b8f1 EVH |
1622 | } |
1623 | ||
51a87c55 | 1624 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1625 | |
51a87c55 EVH |
1626 | p9_free_req(clnt, req); |
1627 | return count; | |
bd238fb4 | 1628 | |
51a87c55 EVH |
1629 | free_and_error: |
1630 | p9_free_req(clnt, req); | |
bd238fb4 | 1631 | error: |
bd238fb4 LI |
1632 | return err; |
1633 | } | |
0fc9655e | 1634 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1635 | |
51a87c55 | 1636 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1637 | { |
51a87c55 EVH |
1638 | int err; |
1639 | struct p9_client *clnt; | |
1640 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1641 | struct p9_req_t *req; | |
1642 | u16 ignored; | |
5503ac56 | 1643 | |
51a87c55 | 1644 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1645 | |
5503ac56 EVH |
1646 | if (!ret) |
1647 | return ERR_PTR(-ENOMEM); | |
1648 | ||
bd238fb4 | 1649 | err = 0; |
bd238fb4 LI |
1650 | clnt = fid->clnt; |
1651 | ||
51a87c55 EVH |
1652 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1653 | if (IS_ERR(req)) { | |
1654 | err = PTR_ERR(req); | |
bd238fb4 LI |
1655 | goto error; |
1656 | } | |
1657 | ||
342fee1d | 1658 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1659 | if (err) { |
e660a828 | 1660 | P9_DUMP_PKT(1, req->rc); |
eedfe1c4 AK |
1661 | p9_free_req(clnt, req); |
1662 | goto error; | |
e7f4b8f1 | 1663 | } |
bd238fb4 | 1664 | |
51a87c55 | 1665 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1666 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1667 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1668 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1669 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1670 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1671 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1672 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1673 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1674 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1675 | |
742b11a7 LI |
1676 | p9_free_req(clnt, req); |
1677 | return ret; | |
1678 | ||
bd238fb4 | 1679 | error: |
742b11a7 LI |
1680 | kfree(ret); |
1681 | return ERR_PTR(err); | |
bd238fb4 LI |
1682 | } |
1683 | EXPORT_SYMBOL(p9_client_stat); | |
1684 | ||
f0853122 SK |
1685 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1686 | u64 request_mask) | |
1687 | { | |
1688 | int err; | |
1689 | struct p9_client *clnt; | |
1690 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1691 | GFP_KERNEL); | |
1692 | struct p9_req_t *req; | |
1693 | ||
1694 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", | |
1695 | fid->fid, request_mask); | |
1696 | ||
1697 | if (!ret) | |
1698 | return ERR_PTR(-ENOMEM); | |
1699 | ||
1700 | err = 0; | |
1701 | clnt = fid->clnt; | |
1702 | ||
1703 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1704 | if (IS_ERR(req)) { | |
1705 | err = PTR_ERR(req); | |
1706 | goto error; | |
1707 | } | |
1708 | ||
1709 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1710 | if (err) { | |
e660a828 | 1711 | P9_DUMP_PKT(1, req->rc); |
f0853122 SK |
1712 | p9_free_req(clnt, req); |
1713 | goto error; | |
1714 | } | |
1715 | ||
1716 | P9_DPRINTK(P9_DEBUG_9P, | |
1717 | "<<< RGETATTR st_result_mask=%lld\n" | |
1718 | "<<< qid=%x.%llx.%x\n" | |
1719 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1720 | "<<< st_uid=%d st_gid=%d\n" | |
1721 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1722 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1723 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1724 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1725 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1726 | "<<< st_gen=%lld st_data_version=%lld", | |
1727 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
1728 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, | |
1729 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, | |
1730 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, | |
1731 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1732 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1733 | ret->st_gen, ret->st_data_version); | |
1734 | ||
1735 | p9_free_req(clnt, req); | |
1736 | return ret; | |
1737 | ||
1738 | error: | |
1739 | kfree(ret); | |
1740 | return ERR_PTR(err); | |
1741 | } | |
1742 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1743 | ||
342fee1d | 1744 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1745 | { |
1746 | int ret; | |
1747 | ||
9d6939da | 1748 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1749 | /* size[2] type[2] dev[4] qid[13] */ |
1750 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1751 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1752 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1753 | |
1754 | if (wst->name) | |
1755 | ret += strlen(wst->name); | |
1756 | if (wst->uid) | |
1757 | ret += strlen(wst->uid); | |
1758 | if (wst->gid) | |
1759 | ret += strlen(wst->gid); | |
1760 | if (wst->muid) | |
1761 | ret += strlen(wst->muid); | |
1762 | ||
c56e4acf SK |
1763 | if ((proto_version == p9_proto_2000u) || |
1764 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1765 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1766 | if (wst->extension) | |
1767 | ret += strlen(wst->extension); | |
1768 | } | |
1769 | ||
1770 | return ret; | |
1771 | } | |
1772 | ||
bd238fb4 LI |
1773 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1774 | { | |
1775 | int err; | |
51a87c55 | 1776 | struct p9_req_t *req; |
bd238fb4 LI |
1777 | struct p9_client *clnt; |
1778 | ||
453ed90d LI |
1779 | err = 0; |
1780 | clnt = fid->clnt; | |
342fee1d | 1781 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
51a87c55 | 1782 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1783 | P9_DPRINTK(P9_DEBUG_9P, |
1784 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1785 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1786 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1787 | " uid=%d gid=%d n_muid=%d\n", | |
1788 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1789 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1790 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1791 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1792 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1793 | |
9d6939da | 1794 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1795 | if (IS_ERR(req)) { |
1796 | err = PTR_ERR(req); | |
1797 | goto error; | |
bd238fb4 LI |
1798 | } |
1799 | ||
51a87c55 | 1800 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1801 | |
51a87c55 EVH |
1802 | p9_free_req(clnt, req); |
1803 | error: | |
bd238fb4 LI |
1804 | return err; |
1805 | } | |
1806 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1807 | |
87d7845a SK |
1808 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1809 | { | |
1810 | int err; | |
1811 | struct p9_req_t *req; | |
1812 | struct p9_client *clnt; | |
1813 | ||
1814 | err = 0; | |
1815 | clnt = fid->clnt; | |
1816 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); | |
1817 | P9_DPRINTK(P9_DEBUG_9P, | |
1818 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" | |
1819 | " atime_sec=%lld atime_nsec=%lld\n" | |
1820 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
1821 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, | |
1822 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, | |
1823 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1824 | ||
1825 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1826 | ||
1827 | if (IS_ERR(req)) { | |
1828 | err = PTR_ERR(req); | |
1829 | goto error; | |
1830 | } | |
1831 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); | |
1832 | p9_free_req(clnt, req); | |
1833 | error: | |
1834 | return err; | |
1835 | } | |
1836 | EXPORT_SYMBOL(p9_client_setattr); | |
1837 | ||
bda8e775 SK |
1838 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1839 | { | |
1840 | int err; | |
1841 | struct p9_req_t *req; | |
1842 | struct p9_client *clnt; | |
1843 | ||
1844 | err = 0; | |
1845 | clnt = fid->clnt; | |
1846 | ||
1847 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); | |
1848 | ||
1849 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1850 | if (IS_ERR(req)) { | |
1851 | err = PTR_ERR(req); | |
1852 | goto error; | |
1853 | } | |
1854 | ||
1855 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1856 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1857 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1858 | if (err) { | |
e660a828 | 1859 | P9_DUMP_PKT(1, req->rc); |
bda8e775 SK |
1860 | p9_free_req(clnt, req); |
1861 | goto error; | |
1862 | } | |
1863 | ||
1864 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " | |
1865 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " | |
1866 | "fsid %llu namelen %ld\n", | |
1867 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1868 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1869 | sb->fsid, (long int)sb->namelen); | |
1870 | ||
1871 | p9_free_req(clnt, req); | |
1872 | error: | |
1873 | return err; | |
1874 | } | |
1875 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda | 1876 | |
9e8fb38e AK |
1877 | int p9_client_rename(struct p9_fid *fid, |
1878 | struct p9_fid *newdirfid, const char *name) | |
4681dbda SK |
1879 | { |
1880 | int err; | |
1881 | struct p9_req_t *req; | |
1882 | struct p9_client *clnt; | |
1883 | ||
1884 | err = 0; | |
1885 | clnt = fid->clnt; | |
1886 | ||
1887 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", | |
1888 | fid->fid, newdirfid->fid, name); | |
1889 | ||
1890 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1891 | newdirfid->fid, name); | |
1892 | if (IS_ERR(req)) { | |
1893 | err = PTR_ERR(req); | |
1894 | goto error; | |
1895 | } | |
1896 | ||
1897 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); | |
1898 | ||
1899 | p9_free_req(clnt, req); | |
1900 | error: | |
1901 | return err; | |
1902 | } | |
1903 | EXPORT_SYMBOL(p9_client_rename); | |
1904 | ||
9e8fb38e AK |
1905 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
1906 | struct p9_fid *newdirfid, const char *new_name) | |
1907 | { | |
1908 | int err; | |
1909 | struct p9_req_t *req; | |
1910 | struct p9_client *clnt; | |
1911 | ||
1912 | err = 0; | |
1913 | clnt = olddirfid->clnt; | |
1914 | ||
1915 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" | |
1916 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, | |
1917 | newdirfid->fid, new_name); | |
1918 | ||
1919 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, | |
1920 | old_name, newdirfid->fid, new_name); | |
1921 | if (IS_ERR(req)) { | |
1922 | err = PTR_ERR(req); | |
1923 | goto error; | |
1924 | } | |
1925 | ||
1926 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", | |
1927 | newdirfid->fid, new_name); | |
1928 | ||
1929 | p9_free_req(clnt, req); | |
1930 | error: | |
1931 | return err; | |
1932 | } | |
1933 | EXPORT_SYMBOL(p9_client_renameat); | |
1934 | ||
0ef63f34 AK |
1935 | /* |
1936 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1937 | */ | |
1938 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1939 | const char *attr_name, u64 *attr_size) | |
1940 | { | |
1941 | int err; | |
1942 | struct p9_req_t *req; | |
1943 | struct p9_client *clnt; | |
1944 | struct p9_fid *attr_fid; | |
1945 | ||
1946 | err = 0; | |
1947 | clnt = file_fid->clnt; | |
1948 | attr_fid = p9_fid_create(clnt); | |
1949 | if (IS_ERR(attr_fid)) { | |
1950 | err = PTR_ERR(attr_fid); | |
1951 | attr_fid = NULL; | |
1952 | goto error; | |
1953 | } | |
1954 | P9_DPRINTK(P9_DEBUG_9P, | |
1955 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", | |
1956 | file_fid->fid, attr_fid->fid, attr_name); | |
1957 | ||
1958 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1959 | file_fid->fid, attr_fid->fid, attr_name); | |
1960 | if (IS_ERR(req)) { | |
1961 | err = PTR_ERR(req); | |
1962 | goto error; | |
1963 | } | |
1964 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
1965 | if (err) { | |
e660a828 | 1966 | P9_DUMP_PKT(1, req->rc); |
0ef63f34 AK |
1967 | p9_free_req(clnt, req); |
1968 | goto clunk_fid; | |
1969 | } | |
1970 | p9_free_req(clnt, req); | |
1971 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", | |
1972 | attr_fid->fid, *attr_size); | |
1973 | return attr_fid; | |
1974 | clunk_fid: | |
1975 | p9_client_clunk(attr_fid); | |
1976 | attr_fid = NULL; | |
1977 | error: | |
1978 | if (attr_fid && (attr_fid != file_fid)) | |
1979 | p9_fid_destroy(attr_fid); | |
1980 | ||
1981 | return ERR_PTR(err); | |
1982 | } | |
1983 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
1984 | ||
eda25e46 AK |
1985 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
1986 | u64 attr_size, int flags) | |
1987 | { | |
1988 | int err; | |
1989 | struct p9_req_t *req; | |
1990 | struct p9_client *clnt; | |
1991 | ||
1992 | P9_DPRINTK(P9_DEBUG_9P, | |
1993 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", | |
1994 | fid->fid, name, (long long)attr_size, flags); | |
1995 | err = 0; | |
1996 | clnt = fid->clnt; | |
1997 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
1998 | fid->fid, name, attr_size, flags); | |
1999 | if (IS_ERR(req)) { | |
2000 | err = PTR_ERR(req); | |
2001 | goto error; | |
2002 | } | |
2003 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); | |
2004 | p9_free_req(clnt, req); | |
2005 | error: | |
2006 | return err; | |
2007 | } | |
2008 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
2009 | ||
7751bdb3 SK |
2010 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
2011 | { | |
abfa034e | 2012 | int err, rsize, non_zc = 0; |
7751bdb3 SK |
2013 | struct p9_client *clnt; |
2014 | struct p9_req_t *req; | |
2015 | char *dataptr; | |
2016 | ||
2017 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", | |
2018 | fid->fid, (long long unsigned) offset, count); | |
2019 | ||
2020 | err = 0; | |
2021 | clnt = fid->clnt; | |
7751bdb3 SK |
2022 | |
2023 | rsize = fid->iounit; | |
2024 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
2025 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
2026 | ||
2027 | if (count < rsize) | |
2028 | rsize = count; | |
2029 | ||
abfa034e AK |
2030 | /* Don't bother zerocopy for small IO (< 1024) */ |
2031 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
2032 | /* | |
2033 | * response header len is 11 | |
2034 | * PDU Header(7) + IO Size (4) | |
2035 | */ | |
2036 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0, | |
2037 | 11, 1, "dqd", fid->fid, offset, rsize); | |
2c66523f | 2038 | } else { |
abfa034e | 2039 | non_zc = 1; |
2c66523f | 2040 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e | 2041 | offset, rsize); |
2c66523f | 2042 | } |
7751bdb3 SK |
2043 | if (IS_ERR(req)) { |
2044 | err = PTR_ERR(req); | |
2045 | goto error; | |
2046 | } | |
2047 | ||
2048 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
2049 | if (err) { | |
e660a828 | 2050 | P9_DUMP_PKT(1, req->rc); |
7751bdb3 SK |
2051 | goto free_and_error; |
2052 | } | |
2053 | ||
2054 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); | |
2055 | ||
abfa034e | 2056 | if (non_zc) |
7751bdb3 SK |
2057 | memmove(data, dataptr, count); |
2058 | ||
2059 | p9_free_req(clnt, req); | |
2060 | return count; | |
2061 | ||
2062 | free_and_error: | |
2063 | p9_free_req(clnt, req); | |
2064 | error: | |
2065 | return err; | |
2066 | } | |
2067 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
2068 | |
2069 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
2070 | dev_t rdev, gid_t gid, struct p9_qid *qid) | |
2071 | { | |
2072 | int err; | |
2073 | struct p9_client *clnt; | |
2074 | struct p9_req_t *req; | |
2075 | ||
2076 | err = 0; | |
2077 | clnt = fid->clnt; | |
2078 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " | |
2079 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); | |
2080 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, | |
2081 | MAJOR(rdev), MINOR(rdev), gid); | |
2082 | if (IS_ERR(req)) | |
2083 | return PTR_ERR(req); | |
2084 | ||
2085 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2086 | if (err) { | |
e660a828 | 2087 | P9_DUMP_PKT(1, req->rc); |
4b43516a MK |
2088 | goto error; |
2089 | } | |
2090 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, | |
2091 | (unsigned long long)qid->path, qid->version); | |
2092 | ||
2093 | error: | |
2094 | p9_free_req(clnt, req); | |
2095 | return err; | |
2096 | ||
2097 | } | |
2098 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
2099 | |
2100 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
2101 | gid_t gid, struct p9_qid *qid) | |
2102 | { | |
2103 | int err; | |
2104 | struct p9_client *clnt; | |
2105 | struct p9_req_t *req; | |
2106 | ||
2107 | err = 0; | |
2108 | clnt = fid->clnt; | |
2109 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", | |
2110 | fid->fid, name, mode, gid); | |
2111 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, | |
2112 | gid); | |
2113 | if (IS_ERR(req)) | |
2114 | return PTR_ERR(req); | |
2115 | ||
2116 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2117 | if (err) { | |
e660a828 | 2118 | P9_DUMP_PKT(1, req->rc); |
01a622bd MK |
2119 | goto error; |
2120 | } | |
2121 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, | |
2122 | (unsigned long long)qid->path, qid->version); | |
2123 | ||
2124 | error: | |
2125 | p9_free_req(clnt, req); | |
2126 | return err; | |
2127 | ||
2128 | } | |
2129 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
a099027c MK |
2130 | |
2131 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
2132 | { | |
2133 | int err; | |
2134 | struct p9_client *clnt; | |
2135 | struct p9_req_t *req; | |
2136 | ||
2137 | err = 0; | |
2138 | clnt = fid->clnt; | |
2139 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " | |
2140 | "start %lld length %lld proc_id %d client_id %s\n", | |
2141 | fid->fid, flock->type, flock->flags, flock->start, | |
2142 | flock->length, flock->proc_id, flock->client_id); | |
2143 | ||
2144 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
2145 | flock->flags, flock->start, flock->length, | |
2146 | flock->proc_id, flock->client_id); | |
2147 | ||
2148 | if (IS_ERR(req)) | |
2149 | return PTR_ERR(req); | |
2150 | ||
2151 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
2152 | if (err) { | |
e660a828 | 2153 | P9_DUMP_PKT(1, req->rc); |
a099027c MK |
2154 | goto error; |
2155 | } | |
2156 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); | |
2157 | error: | |
2158 | p9_free_req(clnt, req); | |
2159 | return err; | |
2160 | ||
2161 | } | |
2162 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1d769cd1 MK |
2163 | |
2164 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
2165 | { | |
2166 | int err; | |
2167 | struct p9_client *clnt; | |
2168 | struct p9_req_t *req; | |
2169 | ||
2170 | err = 0; | |
2171 | clnt = fid->clnt; | |
2172 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " | |
2173 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, | |
2174 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2175 | ||
2176 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
2177 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2178 | ||
2179 | if (IS_ERR(req)) | |
2180 | return PTR_ERR(req); | |
2181 | ||
2182 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
2183 | &glock->start, &glock->length, &glock->proc_id, | |
2184 | &glock->client_id); | |
2185 | if (err) { | |
e660a828 | 2186 | P9_DUMP_PKT(1, req->rc); |
1d769cd1 MK |
2187 | goto error; |
2188 | } | |
2189 | P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " | |
2190 | "proc_id %d client_id %s\n", glock->type, glock->start, | |
2191 | glock->length, glock->proc_id, glock->client_id); | |
2192 | error: | |
2193 | p9_free_req(clnt, req); | |
2194 | return err; | |
2195 | } | |
2196 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
329176cc MK |
2197 | |
2198 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
2199 | { | |
2200 | int err; | |
2201 | struct p9_client *clnt; | |
2202 | struct p9_req_t *req; | |
2203 | ||
2204 | err = 0; | |
2205 | clnt = fid->clnt; | |
2206 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); | |
2207 | ||
2208 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
2209 | if (IS_ERR(req)) | |
2210 | return PTR_ERR(req); | |
2211 | ||
2212 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
2213 | if (err) { | |
e660a828 | 2214 | P9_DUMP_PKT(1, req->rc); |
329176cc MK |
2215 | goto error; |
2216 | } | |
2217 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); | |
2218 | error: | |
2219 | p9_free_req(clnt, req); | |
2220 | return err; | |
2221 | } | |
2222 | EXPORT_SYMBOL(p9_client_readlink); |