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 | ||
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 | |
348b5901 AK |
41 | #define CREATE_TRACE_POINTS |
42 | #include <trace/events/9p.h> | |
43 | ||
8a0dc95f EVH |
44 | /* |
45 | * Client Option Parsing (code inspired by NFS code) | |
46 | * - a little lazy - parse all client options | |
47 | */ | |
48 | ||
49 | enum { | |
50 | Opt_msize, | |
51 | Opt_trans, | |
52 | Opt_legacy, | |
0fb80abd | 53 | Opt_version, |
8a0dc95f EVH |
54 | Opt_err, |
55 | }; | |
56 | ||
a447c093 | 57 | static const match_table_t tokens = { |
8a0dc95f EVH |
58 | {Opt_msize, "msize=%u"}, |
59 | {Opt_legacy, "noextend"}, | |
60 | {Opt_trans, "trans=%s"}, | |
0fb80abd | 61 | {Opt_version, "version=%s"}, |
8a0dc95f EVH |
62 | {Opt_err, NULL}, |
63 | }; | |
64 | ||
342fee1d SK |
65 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
66 | { | |
a02cec21 | 67 | return clnt->proto_version == p9_proto_2000L; |
342fee1d SK |
68 | } |
69 | EXPORT_SYMBOL(p9_is_proto_dotl); | |
70 | ||
71 | inline int p9_is_proto_dotu(struct p9_client *clnt) | |
72 | { | |
a02cec21 | 73 | return clnt->proto_version == p9_proto_2000u; |
342fee1d SK |
74 | } |
75 | EXPORT_SYMBOL(p9_is_proto_dotu); | |
76 | ||
0fb80abd | 77 | /* Interpret mount option for protocol version */ |
4d63055f | 78 | static int get_protocol_version(char *s) |
0fb80abd | 79 | { |
3dc9fef6 DC |
80 | int version = -EINVAL; |
81 | ||
4d63055f | 82 | if (!strcmp(s, "9p2000")) { |
0fb80abd SK |
83 | version = p9_proto_legacy; |
84 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); | |
4d63055f | 85 | } else if (!strcmp(s, "9p2000.u")) { |
0fb80abd SK |
86 | version = p9_proto_2000u; |
87 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); | |
4d63055f | 88 | } else if (!strcmp(s, "9p2000.L")) { |
45bc21ed SK |
89 | version = p9_proto_2000L; |
90 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); | |
4d63055f PK |
91 | } else |
92 | printk(KERN_INFO "9p: Unknown protocol version %s.\n", s); | |
93 | ||
0fb80abd SK |
94 | return version; |
95 | } | |
96 | ||
8a0dc95f | 97 | /** |
0e15597e AK |
98 | * parse_options - parse mount options into client structure |
99 | * @opts: options string passed from mount | |
100 | * @clnt: existing v9fs client information | |
8a0dc95f | 101 | * |
bb8ffdfc | 102 | * Return 0 upon success, -ERRNO upon failure |
8a0dc95f EVH |
103 | */ |
104 | ||
bb8ffdfc | 105 | static int parse_opts(char *opts, struct p9_client *clnt) |
8a0dc95f | 106 | { |
d8c8a9e3 | 107 | char *options, *tmp_options; |
8a0dc95f EVH |
108 | char *p; |
109 | substring_t args[MAX_OPT_ARGS]; | |
110 | int option; | |
4d63055f | 111 | char *s; |
bb8ffdfc | 112 | int ret = 0; |
8a0dc95f | 113 | |
342fee1d | 114 | clnt->proto_version = p9_proto_2000u; |
8a0dc95f EVH |
115 | clnt->msize = 8192; |
116 | ||
bb8ffdfc EVH |
117 | if (!opts) |
118 | return 0; | |
119 | ||
d8c8a9e3 EVH |
120 | tmp_options = kstrdup(opts, GFP_KERNEL); |
121 | if (!tmp_options) { | |
bb8ffdfc EVH |
122 | P9_DPRINTK(P9_DEBUG_ERROR, |
123 | "failed to allocate copy of option string\n"); | |
124 | return -ENOMEM; | |
125 | } | |
d8c8a9e3 | 126 | options = tmp_options; |
8a0dc95f EVH |
127 | |
128 | while ((p = strsep(&options, ",")) != NULL) { | |
4d5077f1 | 129 | int token, r; |
8a0dc95f EVH |
130 | if (!*p) |
131 | continue; | |
132 | token = match_token(p, tokens, args); | |
4d5077f1 AK |
133 | switch (token) { |
134 | case Opt_msize: | |
135 | r = match_int(&args[0], &option); | |
bb8ffdfc | 136 | if (r < 0) { |
8a0dc95f | 137 | P9_DPRINTK(P9_DEBUG_ERROR, |
4d5077f1 | 138 | "integer field, but no integer?\n"); |
bb8ffdfc | 139 | ret = r; |
8a0dc95f EVH |
140 | continue; |
141 | } | |
8a0dc95f EVH |
142 | clnt->msize = option; |
143 | break; | |
144 | case Opt_trans: | |
4d63055f PK |
145 | s = match_strdup(&args[0]); |
146 | if (!s) { | |
147 | ret = -ENOMEM; | |
349d3bb8 | 148 | P9_DPRINTK(P9_DEBUG_ERROR, |
4d63055f PK |
149 | "problem allocating copy of trans arg\n"); |
150 | goto free_and_return; | |
151 | } | |
152 | clnt->trans_mod = v9fs_get_trans_by_name(s); | |
153 | if (clnt->trans_mod == NULL) { | |
154 | printk(KERN_INFO | |
155 | "9p: Could not find " | |
156 | "request transport: %s\n", s); | |
349d3bb8 | 157 | ret = -EINVAL; |
4d63055f | 158 | kfree(s); |
349d3bb8 EVH |
159 | goto free_and_return; |
160 | } | |
4d63055f | 161 | kfree(s); |
8a0dc95f EVH |
162 | break; |
163 | case Opt_legacy: | |
342fee1d | 164 | clnt->proto_version = p9_proto_legacy; |
8a0dc95f | 165 | break; |
0fb80abd | 166 | case Opt_version: |
4d63055f PK |
167 | s = match_strdup(&args[0]); |
168 | if (!s) { | |
169 | ret = -ENOMEM; | |
170 | P9_DPRINTK(P9_DEBUG_ERROR, | |
171 | "problem allocating copy of version arg\n"); | |
0fb80abd | 172 | goto free_and_return; |
4d63055f PK |
173 | } |
174 | ret = get_protocol_version(s); | |
175 | if (ret == -EINVAL) { | |
176 | kfree(s); | |
177 | goto free_and_return; | |
178 | } | |
179 | kfree(s); | |
0fb80abd SK |
180 | clnt->proto_version = ret; |
181 | break; | |
8a0dc95f EVH |
182 | default: |
183 | continue; | |
184 | } | |
185 | } | |
72029fe8 | 186 | |
349d3bb8 | 187 | free_and_return: |
d8c8a9e3 | 188 | kfree(tmp_options); |
bb8ffdfc | 189 | return ret; |
8a0dc95f EVH |
190 | } |
191 | ||
fea511a6 EVH |
192 | /** |
193 | * p9_tag_alloc - lookup/allocate a request by tag | |
194 | * @c: client session to lookup tag within | |
195 | * @tag: numeric id for transaction | |
196 | * | |
197 | * this is a simple array lookup, but will grow the | |
25985edc | 198 | * request_slots as necessary to accommodate transaction |
fea511a6 EVH |
199 | * ids which did not previously have a slot. |
200 | * | |
201 | * this code relies on the client spinlock to manage locks, its | |
202 | * possible we should switch to something else, but I'd rather | |
203 | * stick with something low-overhead for the common case. | |
204 | * | |
205 | */ | |
206 | ||
ef6b0807 DC |
207 | static struct p9_req_t * |
208 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) | |
fea511a6 EVH |
209 | { |
210 | unsigned long flags; | |
211 | int row, col; | |
51a87c55 | 212 | struct p9_req_t *req; |
abfa034e | 213 | int alloc_msize = min(c->msize, max_size); |
fea511a6 EVH |
214 | |
215 | /* This looks up the original request by tag so we know which | |
216 | * buffer to read the data into */ | |
217 | tag++; | |
218 | ||
219 | if (tag >= c->max_tag) { | |
220 | spin_lock_irqsave(&c->lock, flags); | |
221 | /* check again since original check was outside of lock */ | |
222 | while (tag >= c->max_tag) { | |
223 | row = (tag / P9_ROW_MAXTAG); | |
224 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, | |
225 | sizeof(struct p9_req_t), GFP_ATOMIC); | |
226 | ||
227 | if (!c->reqs[row]) { | |
228 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
e45c5405 | 229 | spin_unlock_irqrestore(&c->lock, flags); |
51a87c55 | 230 | return ERR_PTR(-ENOMEM); |
fea511a6 EVH |
231 | } |
232 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
233 | c->reqs[row][col].status = REQ_STATUS_IDLE; | |
51a87c55 | 234 | c->reqs[row][col].tc = NULL; |
fea511a6 EVH |
235 | } |
236 | c->max_tag += P9_ROW_MAXTAG; | |
237 | } | |
238 | spin_unlock_irqrestore(&c->lock, flags); | |
239 | } | |
240 | row = tag / P9_ROW_MAXTAG; | |
241 | col = tag % P9_ROW_MAXTAG; | |
242 | ||
51a87c55 EVH |
243 | req = &c->reqs[row][col]; |
244 | if (!req->tc) { | |
eeff66ef | 245 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
51a87c55 EVH |
246 | if (!req->wq) { |
247 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
248 | return ERR_PTR(-ENOMEM); | |
249 | } | |
250 | init_waitqueue_head(req->wq); | |
abfa034e AK |
251 | req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
252 | GFP_NOFS); | |
abfa034e AK |
253 | req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
254 | GFP_NOFS); | |
51a87c55 EVH |
255 | if ((!req->tc) || (!req->rc)) { |
256 | printk(KERN_ERR "Couldn't grow tag array\n"); | |
257 | kfree(req->tc); | |
258 | kfree(req->rc); | |
45abdf1c TT |
259 | kfree(req->wq); |
260 | req->tc = req->rc = NULL; | |
261 | req->wq = NULL; | |
51a87c55 EVH |
262 | return ERR_PTR(-ENOMEM); |
263 | } | |
5635fd0c DC |
264 | req->tc->capacity = alloc_msize; |
265 | req->rc->capacity = alloc_msize; | |
51a87c55 | 266 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); |
51a87c55 | 267 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); |
51a87c55 EVH |
268 | } |
269 | ||
270 | p9pdu_reset(req->tc); | |
271 | p9pdu_reset(req->rc); | |
272 | ||
51a87c55 EVH |
273 | req->tc->tag = tag-1; |
274 | req->status = REQ_STATUS_ALLOC; | |
fea511a6 EVH |
275 | |
276 | return &c->reqs[row][col]; | |
277 | } | |
fea511a6 EVH |
278 | |
279 | /** | |
280 | * p9_tag_lookup - lookup a request by tag | |
281 | * @c: client session to lookup tag within | |
282 | * @tag: numeric id for transaction | |
283 | * | |
284 | */ | |
285 | ||
286 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) | |
287 | { | |
288 | int row, col; | |
289 | ||
290 | /* This looks up the original request by tag so we know which | |
291 | * buffer to read the data into */ | |
292 | tag++; | |
293 | ||
b85f7d92 EVH |
294 | if(tag >= c->max_tag) |
295 | return NULL; | |
fea511a6 EVH |
296 | |
297 | row = tag / P9_ROW_MAXTAG; | |
298 | col = tag % P9_ROW_MAXTAG; | |
299 | ||
300 | return &c->reqs[row][col]; | |
301 | } | |
302 | EXPORT_SYMBOL(p9_tag_lookup); | |
303 | ||
304 | /** | |
305 | * p9_tag_init - setup tags structure and contents | |
0e15597e | 306 | * @c: v9fs client struct |
fea511a6 EVH |
307 | * |
308 | * This initializes the tags structure for each client instance. | |
309 | * | |
310 | */ | |
311 | ||
312 | static int p9_tag_init(struct p9_client *c) | |
313 | { | |
314 | int err = 0; | |
315 | ||
316 | c->tagpool = p9_idpool_create(); | |
317 | if (IS_ERR(c->tagpool)) { | |
318 | err = PTR_ERR(c->tagpool); | |
fea511a6 EVH |
319 | goto error; |
320 | } | |
fe1cbaba AK |
321 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
322 | if (err < 0) { | |
323 | p9_idpool_destroy(c->tagpool); | |
324 | goto error; | |
325 | } | |
fea511a6 EVH |
326 | c->max_tag = 0; |
327 | error: | |
328 | return err; | |
329 | } | |
330 | ||
331 | /** | |
332 | * p9_tag_cleanup - cleans up tags structure and reclaims resources | |
0e15597e | 333 | * @c: v9fs client struct |
fea511a6 EVH |
334 | * |
335 | * This frees resources associated with the tags structure | |
336 | * | |
337 | */ | |
338 | static void p9_tag_cleanup(struct p9_client *c) | |
339 | { | |
340 | int row, col; | |
341 | ||
342 | /* check to insure all requests are idle */ | |
343 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
344 | for (col = 0; col < P9_ROW_MAXTAG; col++) { | |
345 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { | |
346 | P9_DPRINTK(P9_DEBUG_MUX, | |
347 | "Attempting to cleanup non-free tag %d,%d\n", | |
348 | row, col); | |
349 | /* TODO: delay execution of cleanup */ | |
350 | return; | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
62b2be59 LI |
355 | if (c->tagpool) { |
356 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ | |
fea511a6 | 357 | p9_idpool_destroy(c->tagpool); |
62b2be59 | 358 | } |
fea511a6 EVH |
359 | |
360 | /* free requests associated with tags */ | |
361 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { | |
51a87c55 | 362 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
fea511a6 | 363 | kfree(c->reqs[row][col].wq); |
51a87c55 EVH |
364 | kfree(c->reqs[row][col].tc); |
365 | kfree(c->reqs[row][col].rc); | |
366 | } | |
fea511a6 EVH |
367 | kfree(c->reqs[row]); |
368 | } | |
369 | c->max_tag = 0; | |
370 | } | |
371 | ||
673d62cd EVH |
372 | /** |
373 | * p9_free_req - free a request and clean-up as necessary | |
374 | * c: client state | |
375 | * r: request to release | |
376 | * | |
377 | */ | |
378 | ||
51a87c55 | 379 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
673d62cd | 380 | { |
51a87c55 EVH |
381 | int tag = r->tc->tag; |
382 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); | |
383 | ||
673d62cd | 384 | r->status = REQ_STATUS_IDLE; |
51a87c55 EVH |
385 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
386 | p9_idpool_put(tag, c->tagpool); | |
673d62cd EVH |
387 | } |
388 | ||
91b8534f EVH |
389 | /** |
390 | * p9_client_cb - call back from transport to client | |
391 | * c: client state | |
392 | * req: request received | |
393 | * | |
394 | */ | |
395 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) | |
396 | { | |
51a87c55 | 397 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
1bab88b2 LI |
398 | wake_up(req->wq); |
399 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); | |
91b8534f EVH |
400 | } |
401 | EXPORT_SYMBOL(p9_client_cb); | |
402 | ||
51a87c55 EVH |
403 | /** |
404 | * p9_parse_header - parse header arguments out of a packet | |
405 | * @pdu: packet to parse | |
406 | * @size: size of packet | |
407 | * @type: type of request | |
408 | * @tag: tag of packet | |
409 | * @rewind: set if we need to rewind offset afterwards | |
410 | */ | |
411 | ||
412 | int | |
413 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, | |
414 | int rewind) | |
415 | { | |
416 | int8_t r_type; | |
417 | int16_t r_tag; | |
418 | int32_t r_size; | |
419 | int offset = pdu->offset; | |
420 | int err; | |
421 | ||
422 | pdu->offset = 0; | |
423 | if (pdu->size == 0) | |
424 | pdu->size = 7; | |
425 | ||
426 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); | |
427 | if (err) | |
428 | goto rewind_and_exit; | |
429 | ||
430 | pdu->size = r_size; | |
431 | pdu->id = r_type; | |
432 | pdu->tag = r_tag; | |
433 | ||
e7f4b8f1 EVH |
434 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
435 | pdu->id, pdu->tag); | |
51a87c55 EVH |
436 | |
437 | if (type) | |
438 | *type = r_type; | |
439 | if (tag) | |
440 | *tag = r_tag; | |
441 | if (size) | |
442 | *size = r_size; | |
443 | ||
444 | ||
445 | rewind_and_exit: | |
446 | if (rewind) | |
447 | pdu->offset = offset; | |
448 | return err; | |
449 | } | |
450 | EXPORT_SYMBOL(p9_parse_header); | |
451 | ||
452 | /** | |
453 | * p9_check_errors - check 9p packet for error return and process it | |
454 | * @c: current client instance | |
455 | * @req: request to parse and check for error conditions | |
456 | * | |
457 | * returns error code if one is discovered, otherwise returns 0 | |
458 | * | |
459 | * this will have to be more complicated if we have multiple | |
460 | * error packet types | |
461 | */ | |
462 | ||
463 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) | |
464 | { | |
465 | int8_t type; | |
466 | int err; | |
ca41bb3e | 467 | int ecode; |
51a87c55 EVH |
468 | |
469 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
470 | /* |
471 | * dump the response from server | |
472 | * This should be after check errors which poplulate pdu_fcall. | |
473 | */ | |
474 | trace_9p_protocol_dump(c, req->rc); | |
51a87c55 EVH |
475 | if (err) { |
476 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
477 | return err; | |
478 | } | |
ca41bb3e VJJ |
479 | if (type != P9_RERROR && type != P9_RLERROR) |
480 | return 0; | |
4f7ebe80 | 481 | |
ca41bb3e VJJ |
482 | if (!p9_is_proto_dotl(c)) { |
483 | char *ename; | |
ca41bb3e | 484 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e | 485 | &ename, &ecode); |
ca41bb3e VJJ |
486 | if (err) |
487 | goto out_err; | |
4f7ebe80 | 488 | |
ca41bb3e VJJ |
489 | if (p9_is_proto_dotu(c)) |
490 | err = -ecode; | |
4f7ebe80 | 491 | |
ca41bb3e VJJ |
492 | if (!err || !IS_ERR_VALUE(err)) { |
493 | err = p9_errstr2errno(ename, strlen(ename)); | |
4f7ebe80 | 494 | |
abfa034e AK |
495 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
496 | -ecode, ename); | |
4f7ebe80 | 497 | } |
abfa034e | 498 | kfree(ename); |
ca41bb3e VJJ |
499 | } else { |
500 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
501 | err = -ecode; | |
502 | ||
503 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); | |
504 | } | |
51a87c55 | 505 | |
51a87c55 | 506 | return err; |
4f7ebe80 AB |
507 | |
508 | out_err: | |
509 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); | |
510 | ||
511 | return err; | |
51a87c55 EVH |
512 | } |
513 | ||
abfa034e AK |
514 | /** |
515 | * p9_check_zc_errors - check 9p packet for error return and process it | |
516 | * @c: current client instance | |
517 | * @req: request to parse and check for error conditions | |
518 | * @in_hdrlen: Size of response protocol buffer. | |
519 | * | |
520 | * returns error code if one is discovered, otherwise returns 0 | |
521 | * | |
522 | * this will have to be more complicated if we have multiple | |
523 | * error packet types | |
524 | */ | |
525 | ||
526 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, | |
527 | char *uidata, int in_hdrlen, int kern_buf) | |
528 | { | |
529 | int err; | |
530 | int ecode; | |
531 | int8_t type; | |
532 | char *ename = NULL; | |
533 | ||
534 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); | |
348b5901 AK |
535 | /* |
536 | * dump the response from server | |
537 | * This should be after parse_header which poplulate pdu_fcall. | |
538 | */ | |
539 | trace_9p_protocol_dump(c, req->rc); | |
abfa034e AK |
540 | if (err) { |
541 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); | |
542 | return err; | |
543 | } | |
544 | ||
545 | if (type != P9_RERROR && type != P9_RLERROR) | |
546 | return 0; | |
547 | ||
548 | if (!p9_is_proto_dotl(c)) { | |
549 | /* Error is reported in string format */ | |
550 | uint16_t len; | |
551 | /* 7 = header size for RERROR, 2 is the size of string len; */ | |
552 | int inline_len = in_hdrlen - (7 + 2); | |
553 | ||
554 | /* Read the size of error string */ | |
555 | err = p9pdu_readf(req->rc, c->proto_version, "w", &len); | |
556 | if (err) | |
557 | goto out_err; | |
558 | ||
559 | ename = kmalloc(len + 1, GFP_NOFS); | |
560 | if (!ename) { | |
561 | err = -ENOMEM; | |
562 | goto out_err; | |
563 | } | |
564 | if (len <= inline_len) { | |
565 | /* We have error in protocol buffer itself */ | |
566 | if (pdu_read(req->rc, ename, len)) { | |
567 | err = -EFAULT; | |
568 | goto out_free; | |
569 | ||
570 | } | |
571 | } else { | |
572 | /* | |
573 | * Part of the data is in user space buffer. | |
574 | */ | |
575 | if (pdu_read(req->rc, ename, inline_len)) { | |
576 | err = -EFAULT; | |
577 | goto out_free; | |
578 | ||
579 | } | |
580 | if (kern_buf) { | |
581 | memcpy(ename + inline_len, uidata, | |
582 | len - inline_len); | |
583 | } else { | |
584 | err = copy_from_user(ename + inline_len, | |
585 | uidata, len - inline_len); | |
586 | if (err) { | |
587 | err = -EFAULT; | |
588 | goto out_free; | |
589 | } | |
590 | } | |
591 | } | |
592 | ename[len] = 0; | |
593 | if (p9_is_proto_dotu(c)) { | |
594 | /* For dotu we also have error code */ | |
595 | err = p9pdu_readf(req->rc, | |
596 | c->proto_version, "d", &ecode); | |
597 | if (err) | |
598 | goto out_free; | |
599 | err = -ecode; | |
600 | } | |
601 | if (!err || !IS_ERR_VALUE(err)) { | |
602 | err = p9_errstr2errno(ename, strlen(ename)); | |
603 | ||
604 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", | |
605 | -ecode, ename); | |
606 | } | |
607 | kfree(ename); | |
608 | } else { | |
609 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); | |
610 | err = -ecode; | |
611 | ||
612 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); | |
613 | } | |
614 | return err; | |
615 | ||
616 | out_free: | |
617 | kfree(ename); | |
618 | out_err: | |
619 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); | |
620 | return err; | |
621 | } | |
622 | ||
aca00763 RL |
623 | static struct p9_req_t * |
624 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); | |
625 | ||
51a87c55 EVH |
626 | /** |
627 | * p9_client_flush - flush (cancel) a request | |
0e15597e AK |
628 | * @c: client state |
629 | * @oldreq: request to cancel | |
51a87c55 | 630 | * |
aca00763 | 631 | * This sents a flush for a particular request and links |
51a87c55 EVH |
632 | * the flush request to the original request. The current |
633 | * code only supports a single flush request although the protocol | |
634 | * allows for multiple flush requests to be sent for a single request. | |
635 | * | |
636 | */ | |
637 | ||
638 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) | |
639 | { | |
640 | struct p9_req_t *req; | |
641 | int16_t oldtag; | |
642 | int err; | |
643 | ||
644 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); | |
645 | if (err) | |
646 | return err; | |
647 | ||
648 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); | |
649 | ||
650 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); | |
651 | if (IS_ERR(req)) | |
652 | return PTR_ERR(req); | |
653 | ||
51a87c55 | 654 | |
1bab88b2 LI |
655 | /* if we haven't received a response for oldreq, |
656 | remove it from the list. */ | |
657 | spin_lock(&c->lock); | |
658 | if (oldreq->status == REQ_STATUS_FLSH) | |
659 | list_del(&oldreq->req_list); | |
660 | spin_unlock(&c->lock); | |
661 | ||
662 | p9_free_req(c, req); | |
51a87c55 EVH |
663 | return 0; |
664 | } | |
665 | ||
abfa034e AK |
666 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
667 | int8_t type, int req_size, | |
668 | const char *fmt, va_list ap) | |
91b8534f | 669 | { |
51a87c55 | 670 | int tag, err; |
91b8534f | 671 | struct p9_req_t *req; |
91b8534f | 672 | |
51a87c55 | 673 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
91b8534f | 674 | |
6d96d3ab AK |
675 | /* we allow for any status other than disconnected */ |
676 | if (c->status == Disconnected) | |
677 | return ERR_PTR(-EIO); | |
678 | ||
679 | /* if status is begin_disconnected we allow only clunk request */ | |
680 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) | |
51a87c55 | 681 | return ERR_PTR(-EIO); |
91b8534f | 682 | |
91b8534f | 683 | tag = P9_NOTAG; |
51a87c55 | 684 | if (type != P9_TVERSION) { |
91b8534f EVH |
685 | tag = p9_idpool_get(c->tagpool); |
686 | if (tag < 0) | |
51a87c55 | 687 | return ERR_PTR(-ENOMEM); |
91b8534f EVH |
688 | } |
689 | ||
abfa034e | 690 | req = p9_tag_alloc(c, tag, req_size); |
51a87c55 EVH |
691 | if (IS_ERR(req)) |
692 | return req; | |
91b8534f | 693 | |
51a87c55 EVH |
694 | /* marshall the data */ |
695 | p9pdu_prepare(req->tc, tag, type); | |
342fee1d | 696 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe AK |
697 | if (err) |
698 | goto reterr; | |
348b5901 AK |
699 | p9pdu_finalize(c, req->tc); |
700 | trace_9p_client_req(c, type, tag); | |
abfa034e AK |
701 | return req; |
702 | reterr: | |
703 | p9_free_req(c, req); | |
704 | return ERR_PTR(err); | |
705 | } | |
706 | ||
707 | /** | |
708 | * p9_client_rpc - issue a request and wait for a response | |
709 | * @c: client session | |
710 | * @type: type of request | |
711 | * @fmt: protocol format string (see protocol.c) | |
712 | * | |
713 | * Returns request structure (which client must free using p9_free_req) | |
714 | */ | |
715 | ||
716 | static struct p9_req_t * | |
717 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) | |
718 | { | |
719 | va_list ap; | |
720 | int sigpending, err; | |
721 | unsigned long flags; | |
722 | struct p9_req_t *req; | |
723 | ||
724 | va_start(ap, fmt); | |
725 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); | |
726 | va_end(ap); | |
727 | if (IS_ERR(req)) | |
728 | return req; | |
729 | ||
730 | if (signal_pending(current)) { | |
731 | sigpending = 1; | |
732 | clear_thread_flag(TIF_SIGPENDING); | |
733 | } else | |
734 | sigpending = 0; | |
91b8534f EVH |
735 | |
736 | err = c->trans_mod->request(c, req); | |
737 | if (err < 0) { | |
3cd79678 | 738 | if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d | 739 | c->status = Disconnected; |
91b8534f EVH |
740 | goto reterr; |
741 | } | |
abfa034e | 742 | /* Wait for the response */ |
91b8534f | 743 | err = wait_event_interruptible(*req->wq, |
abfa034e | 744 | req->status >= REQ_STATUS_RCVD); |
91b8534f EVH |
745 | |
746 | if (req->status == REQ_STATUS_ERROR) { | |
51a87c55 | 747 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
91b8534f | 748 | err = req->t_err; |
91b8534f | 749 | } |
1bab88b2 | 750 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
51a87c55 | 751 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
91b8534f | 752 | sigpending = 1; |
91b8534f EVH |
753 | clear_thread_flag(TIF_SIGPENDING); |
754 | ||
1bab88b2 LI |
755 | if (c->trans_mod->cancel(c, req)) |
756 | p9_client_flush(c, req); | |
757 | ||
758 | /* if we received the response anyway, don't signal error */ | |
759 | if (req->status == REQ_STATUS_RCVD) | |
760 | err = 0; | |
91b8534f | 761 | } |
91b8534f EVH |
762 | if (sigpending) { |
763 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
764 | recalc_sigpending(); | |
765 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
766 | } | |
91b8534f EVH |
767 | if (err < 0) |
768 | goto reterr; | |
769 | ||
51a87c55 | 770 | err = p9_check_errors(c, req); |
348b5901 AK |
771 | trace_9p_client_res(c, type, req->rc->tag, err); |
772 | if (!err) | |
51a87c55 | 773 | return req; |
abfa034e | 774 | reterr: |
abfa034e AK |
775 | p9_free_req(c, req); |
776 | return ERR_PTR(err); | |
777 | } | |
778 | ||
779 | /** | |
780 | * p9_client_zc_rpc - issue a request and wait for a response | |
781 | * @c: client session | |
782 | * @type: type of request | |
783 | * @uidata: user bffer that should be ued for zero copy read | |
784 | * @uodata: user buffer that shoud be user for zero copy write | |
785 | * @inlen: read buffer size | |
786 | * @olen: write buffer size | |
787 | * @hdrlen: reader header size, This is the size of response protocol data | |
788 | * @fmt: protocol format string (see protocol.c) | |
789 | * | |
790 | * Returns request structure (which client must free using p9_free_req) | |
791 | */ | |
792 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, | |
793 | char *uidata, char *uodata, | |
794 | int inlen, int olen, int in_hdrlen, | |
795 | int kern_buf, const char *fmt, ...) | |
796 | { | |
797 | va_list ap; | |
798 | int sigpending, err; | |
799 | unsigned long flags; | |
800 | struct p9_req_t *req; | |
801 | ||
802 | va_start(ap, fmt); | |
803 | /* | |
804 | * We allocate a inline protocol data of only 4k bytes. | |
805 | * The actual content is passed in zero-copy fashion. | |
806 | */ | |
807 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); | |
808 | va_end(ap); | |
809 | if (IS_ERR(req)) | |
810 | return req; | |
811 | ||
812 | if (signal_pending(current)) { | |
813 | sigpending = 1; | |
814 | clear_thread_flag(TIF_SIGPENDING); | |
815 | } else | |
816 | sigpending = 0; | |
817 | ||
818 | /* If we are called with KERNEL_DS force kern_buf */ | |
819 | if (segment_eq(get_fs(), KERNEL_DS)) | |
820 | kern_buf = 1; | |
821 | ||
822 | err = c->trans_mod->zc_request(c, req, uidata, uodata, | |
823 | inlen, olen, in_hdrlen, kern_buf); | |
824 | if (err < 0) { | |
825 | if (err == -EIO) | |
826 | c->status = Disconnected; | |
827 | goto reterr; | |
828 | } | |
829 | if (req->status == REQ_STATUS_ERROR) { | |
830 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); | |
831 | err = req->t_err; | |
832 | } | |
833 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { | |
834 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); | |
835 | sigpending = 1; | |
836 | clear_thread_flag(TIF_SIGPENDING); | |
91b8534f | 837 | |
abfa034e AK |
838 | if (c->trans_mod->cancel(c, req)) |
839 | p9_client_flush(c, req); | |
840 | ||
841 | /* if we received the response anyway, don't signal error */ | |
842 | if (req->status == REQ_STATUS_RCVD) | |
843 | err = 0; | |
844 | } | |
845 | if (sigpending) { | |
846 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
847 | recalc_sigpending(); | |
848 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
849 | } | |
850 | if (err < 0) | |
851 | goto reterr; | |
852 | ||
853 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf); | |
348b5901 AK |
854 | trace_9p_client_res(c, type, req->rc->tag, err); |
855 | if (!err) | |
abfa034e | 856 | return req; |
91b8534f EVH |
857 | reterr: |
858 | p9_free_req(c, req); | |
51a87c55 | 859 | return ERR_PTR(err); |
91b8534f EVH |
860 | } |
861 | ||
5503ac56 EVH |
862 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
863 | { | |
9f3e9bbe | 864 | int ret; |
5503ac56 | 865 | struct p9_fid *fid; |
cac23d65 | 866 | unsigned long flags; |
5503ac56 | 867 | |
51a87c55 | 868 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
5503ac56 EVH |
869 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
870 | if (!fid) | |
871 | return ERR_PTR(-ENOMEM); | |
872 | ||
9f3e9bbe | 873 | ret = p9_idpool_get(clnt->fidpool); |
24e94de4 | 874 | if (ret < 0) { |
9f3e9bbe | 875 | ret = -ENOSPC; |
5503ac56 EVH |
876 | goto error; |
877 | } | |
9f3e9bbe | 878 | fid->fid = ret; |
5503ac56 EVH |
879 | |
880 | memset(&fid->qid, 0, sizeof(struct p9_qid)); | |
881 | fid->mode = -1; | |
f8b9d53a | 882 | fid->uid = current_fsuid(); |
5503ac56 | 883 | fid->clnt = clnt; |
3e2796a9 | 884 | fid->rdir = NULL; |
cac23d65 | 885 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 886 | list_add(&fid->flist, &clnt->fidlist); |
cac23d65 | 887 | spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac56 EVH |
888 | |
889 | return fid; | |
890 | ||
891 | error: | |
892 | kfree(fid); | |
9f3e9bbe | 893 | return ERR_PTR(ret); |
5503ac56 EVH |
894 | } |
895 | ||
896 | static void p9_fid_destroy(struct p9_fid *fid) | |
897 | { | |
898 | struct p9_client *clnt; | |
cac23d65 | 899 | unsigned long flags; |
5503ac56 | 900 | |
51a87c55 | 901 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
5503ac56 EVH |
902 | clnt = fid->clnt; |
903 | p9_idpool_put(fid->fid, clnt->fidpool); | |
cac23d65 | 904 | spin_lock_irqsave(&clnt->lock, flags); |
5503ac56 | 905 | list_del(&fid->flist); |
cac23d65 | 906 | spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a9 | 907 | kfree(fid->rdir); |
5503ac56 EVH |
908 | kfree(fid); |
909 | } | |
8a0dc95f | 910 | |
32a875ad | 911 | static int p9_client_version(struct p9_client *c) |
bd238fb4 | 912 | { |
6936bf60 | 913 | int err = 0; |
51a87c55 EVH |
914 | struct p9_req_t *req; |
915 | char *version; | |
916 | int msize; | |
bd238fb4 | 917 | |
342fee1d SK |
918 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
919 | c->msize, c->proto_version); | |
c5a7697d SK |
920 | |
921 | switch (c->proto_version) { | |
45bc21ed | 922 | case p9_proto_2000L: |
c5a7697d | 923 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21ed | 924 | c->msize, "9P2000.L"); |
c5a7697d SK |
925 | break; |
926 | case p9_proto_2000u: | |
927 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
928 | c->msize, "9P2000.u"); | |
929 | break; | |
930 | case p9_proto_legacy: | |
931 | req = p9_client_rpc(c, P9_TVERSION, "ds", | |
932 | c->msize, "9P2000"); | |
933 | break; | |
934 | default: | |
935 | return -EINVAL; | |
936 | break; | |
937 | } | |
938 | ||
51a87c55 EVH |
939 | if (IS_ERR(req)) |
940 | return PTR_ERR(req); | |
6936bf60 | 941 | |
342fee1d | 942 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c55 EVH |
943 | if (err) { |
944 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); | |
348b5901 | 945 | trace_9p_protocol_dump(c, req->rc); |
6936bf60 | 946 | goto error; |
51a87c55 | 947 | } |
6936bf60 | 948 | |
51a87c55 | 949 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
45bc21ed SK |
950 | if (!strncmp(version, "9P2000.L", 8)) |
951 | c->proto_version = p9_proto_2000L; | |
c5a7697d | 952 | else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d SK |
953 | c->proto_version = p9_proto_2000u; |
954 | else if (!strncmp(version, "9P2000", 6)) | |
955 | c->proto_version = p9_proto_legacy; | |
6936bf60 EVH |
956 | else { |
957 | err = -EREMOTEIO; | |
958 | goto error; | |
959 | } | |
960 | ||
51a87c55 EVH |
961 | if (msize < c->msize) |
962 | c->msize = msize; | |
6936bf60 EVH |
963 | |
964 | error: | |
51a87c55 EVH |
965 | kfree(version); |
966 | p9_free_req(c, req); | |
6936bf60 EVH |
967 | |
968 | return err; | |
969 | } | |
6936bf60 EVH |
970 | |
971 | struct p9_client *p9_client_create(const char *dev_name, char *options) | |
972 | { | |
973 | int err; | |
974 | struct p9_client *clnt; | |
975 | ||
976 | err = 0; | |
bd238fb4 LI |
977 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
978 | if (!clnt) | |
979 | return ERR_PTR(-ENOMEM); | |
980 | ||
72029fe8 | 981 | clnt->trans_mod = NULL; |
bb8ffdfc | 982 | clnt->trans = NULL; |
bd238fb4 | 983 | spin_lock_init(&clnt->lock); |
bd238fb4 | 984 | INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb4 | 985 | |
fe1cbaba AK |
986 | err = p9_tag_init(clnt); |
987 | if (err < 0) | |
988 | goto free_client; | |
fea511a6 | 989 | |
bb8ffdfc EVH |
990 | err = parse_opts(options, clnt); |
991 | if (err < 0) | |
fe1cbaba | 992 | goto destroy_tagpool; |
bb8ffdfc | 993 | |
a17d1720 AK |
994 | if (!clnt->trans_mod) |
995 | clnt->trans_mod = v9fs_get_default_trans(); | |
996 | ||
8a0dc95f EVH |
997 | if (clnt->trans_mod == NULL) { |
998 | err = -EPROTONOSUPPORT; | |
999 | P9_DPRINTK(P9_DEBUG_ERROR, | |
1000 | "No transport defined or default transport\n"); | |
fe1cbaba | 1001 | goto destroy_tagpool; |
8781ff94 EVH |
1002 | } |
1003 | ||
1004 | clnt->fidpool = p9_idpool_create(); | |
1005 | if (IS_ERR(clnt->fidpool)) { | |
1006 | err = PTR_ERR(clnt->fidpool); | |
8781ff94 | 1007 | goto put_trans; |
8a0dc95f EVH |
1008 | } |
1009 | ||
342fee1d SK |
1010 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
1011 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); | |
8a0dc95f | 1012 | |
8b81ef58 EVH |
1013 | err = clnt->trans_mod->create(clnt, dev_name, options); |
1014 | if (err) | |
8781ff94 | 1015 | goto destroy_fidpool; |
bd238fb4 | 1016 | |
c9ffb05c VJJ |
1017 | if (clnt->msize > clnt->trans_mod->maxsize) |
1018 | clnt->msize = clnt->trans_mod->maxsize; | |
8a0dc95f | 1019 | |
6936bf60 | 1020 | err = p9_client_version(clnt); |
bd238fb4 | 1021 | if (err) |
8781ff94 | 1022 | goto close_trans; |
bd238fb4 | 1023 | |
bd238fb4 LI |
1024 | return clnt; |
1025 | ||
8781ff94 EVH |
1026 | close_trans: |
1027 | clnt->trans_mod->close(clnt); | |
1028 | destroy_fidpool: | |
1029 | p9_idpool_destroy(clnt->fidpool); | |
1030 | put_trans: | |
1031 | v9fs_put_trans(clnt->trans_mod); | |
fe1cbaba AK |
1032 | destroy_tagpool: |
1033 | p9_idpool_destroy(clnt->tagpool); | |
8781ff94 EVH |
1034 | free_client: |
1035 | kfree(clnt); | |
bd238fb4 LI |
1036 | return ERR_PTR(err); |
1037 | } | |
1038 | EXPORT_SYMBOL(p9_client_create); | |
1039 | ||
1040 | void p9_client_destroy(struct p9_client *clnt) | |
1041 | { | |
1042 | struct p9_fid *fid, *fidptr; | |
1043 | ||
51a87c55 | 1044 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
bd238fb4 | 1045 | |
8b81ef58 EVH |
1046 | if (clnt->trans_mod) |
1047 | clnt->trans_mod->close(clnt); | |
bd238fb4 | 1048 | |
72029fe8 TH |
1049 | v9fs_put_trans(clnt->trans_mod); |
1050 | ||
6d96d3ab AK |
1051 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
1052 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); | |
bd238fb4 | 1053 | p9_fid_destroy(fid); |
6d96d3ab | 1054 | } |
bd238fb4 | 1055 | |
0af8887e EVH |
1056 | if (clnt->fidpool) |
1057 | p9_idpool_destroy(clnt->fidpool); | |
1058 | ||
fea511a6 EVH |
1059 | p9_tag_cleanup(clnt); |
1060 | ||
bd238fb4 LI |
1061 | kfree(clnt); |
1062 | } | |
1063 | EXPORT_SYMBOL(p9_client_destroy); | |
1064 | ||
1065 | void p9_client_disconnect(struct p9_client *clnt) | |
1066 | { | |
1067 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
8b81ef58 | 1068 | clnt->status = Disconnected; |
bd238fb4 LI |
1069 | } |
1070 | EXPORT_SYMBOL(p9_client_disconnect); | |
1071 | ||
6d96d3ab AK |
1072 | void p9_client_begin_disconnect(struct p9_client *clnt) |
1073 | { | |
1074 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); | |
1075 | clnt->status = BeginDisconnect; | |
1076 | } | |
1077 | EXPORT_SYMBOL(p9_client_begin_disconnect); | |
1078 | ||
bd238fb4 | 1079 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
ba17674f | 1080 | char *uname, u32 n_uname, char *aname) |
bd238fb4 | 1081 | { |
348b5901 | 1082 | int err = 0; |
51a87c55 | 1083 | struct p9_req_t *req; |
bd238fb4 | 1084 | struct p9_fid *fid; |
51a87c55 | 1085 | struct p9_qid qid; |
bd238fb4 | 1086 | |
bd238fb4 | 1087 | |
348b5901 AK |
1088 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
1089 | afid ? afid->fid : -1, uname, aname); | |
bd238fb4 LI |
1090 | fid = p9_fid_create(clnt); |
1091 | if (IS_ERR(fid)) { | |
1092 | err = PTR_ERR(fid); | |
1093 | fid = NULL; | |
1094 | goto error; | |
1095 | } | |
1096 | ||
51a87c55 EVH |
1097 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
1098 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); | |
1099 | if (IS_ERR(req)) { | |
1100 | err = PTR_ERR(req); | |
bd238fb4 LI |
1101 | goto error; |
1102 | } | |
1103 | ||
342fee1d | 1104 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c55 | 1105 | if (err) { |
348b5901 | 1106 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1107 | p9_free_req(clnt, req); |
bd238fb4 | 1108 | goto error; |
51a87c55 | 1109 | } |
bd238fb4 | 1110 | |
51a87c55 | 1111 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
b0d5fdef RD |
1112 | qid.type, |
1113 | (unsigned long long)qid.path, | |
1114 | qid.version); | |
51a87c55 EVH |
1115 | |
1116 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); | |
1117 | ||
1118 | p9_free_req(clnt, req); | |
bd238fb4 LI |
1119 | return fid; |
1120 | ||
1121 | error: | |
bd238fb4 LI |
1122 | if (fid) |
1123 | p9_fid_destroy(fid); | |
1124 | return ERR_PTR(err); | |
1125 | } | |
1126 | EXPORT_SYMBOL(p9_client_attach); | |
1127 | ||
b76225e2 HPB |
1128 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
1129 | char **wnames, int clone) | |
bd238fb4 LI |
1130 | { |
1131 | int err; | |
bd238fb4 LI |
1132 | struct p9_client *clnt; |
1133 | struct p9_fid *fid; | |
51a87c55 EVH |
1134 | struct p9_qid *wqids; |
1135 | struct p9_req_t *req; | |
b76225e2 | 1136 | uint16_t nwqids, count; |
bd238fb4 | 1137 | |
bd238fb4 | 1138 | err = 0; |
62b2be59 | 1139 | wqids = NULL; |
bd238fb4 LI |
1140 | clnt = oldfid->clnt; |
1141 | if (clone) { | |
1142 | fid = p9_fid_create(clnt); | |
1143 | if (IS_ERR(fid)) { | |
1144 | err = PTR_ERR(fid); | |
1145 | fid = NULL; | |
1146 | goto error; | |
1147 | } | |
1148 | ||
1149 | fid->uid = oldfid->uid; | |
1150 | } else | |
1151 | fid = oldfid; | |
1152 | ||
51a87c55 | 1153 | |
b76225e2 | 1154 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
51a87c55 EVH |
1155 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
1156 | ||
1157 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, | |
1158 | nwname, wnames); | |
1159 | if (IS_ERR(req)) { | |
1160 | err = PTR_ERR(req); | |
bd238fb4 LI |
1161 | goto error; |
1162 | } | |
1163 | ||
342fee1d | 1164 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1 | 1165 | if (err) { |
348b5901 | 1166 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 | 1167 | p9_free_req(clnt, req); |
51a87c55 | 1168 | goto clunk_fid; |
e7f4b8f1 EVH |
1169 | } |
1170 | p9_free_req(clnt, req); | |
bd238fb4 | 1171 | |
51a87c55 EVH |
1172 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
1173 | ||
1174 | if (nwqids != nwname) { | |
bd238fb4 LI |
1175 | err = -ENOENT; |
1176 | goto clunk_fid; | |
1177 | } | |
1178 | ||
51a87c55 EVH |
1179 | for (count = 0; count < nwqids; count++) |
1180 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", | |
b0d5fdef RD |
1181 | count, wqids[count].type, |
1182 | (unsigned long long)wqids[count].path, | |
51a87c55 EVH |
1183 | wqids[count].version); |
1184 | ||
bd238fb4 | 1185 | if (nwname) |
51a87c55 | 1186 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb4 LI |
1187 | else |
1188 | fid->qid = oldfid->qid; | |
1189 | ||
62b2be59 | 1190 | kfree(wqids); |
bd238fb4 LI |
1191 | return fid; |
1192 | ||
1193 | clunk_fid: | |
62b2be59 | 1194 | kfree(wqids); |
51a87c55 EVH |
1195 | p9_client_clunk(fid); |
1196 | fid = NULL; | |
bd238fb4 LI |
1197 | |
1198 | error: | |
bd238fb4 LI |
1199 | if (fid && (fid != oldfid)) |
1200 | p9_fid_destroy(fid); | |
1201 | ||
1202 | return ERR_PTR(err); | |
1203 | } | |
1204 | EXPORT_SYMBOL(p9_client_walk); | |
1205 | ||
1206 | int p9_client_open(struct p9_fid *fid, int mode) | |
1207 | { | |
1208 | int err; | |
bd238fb4 | 1209 | struct p9_client *clnt; |
51a87c55 EVH |
1210 | struct p9_req_t *req; |
1211 | struct p9_qid qid; | |
1212 | int iounit; | |
bd238fb4 | 1213 | |
bd238fb4 | 1214 | clnt = fid->clnt; |
ef56547e MK |
1215 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
1216 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); | |
1217 | err = 0; | |
bd238fb4 LI |
1218 | |
1219 | if (fid->mode != -1) | |
1220 | return -EINVAL; | |
1221 | ||
ef56547e MK |
1222 | if (p9_is_proto_dotl(clnt)) |
1223 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); | |
1224 | else | |
1225 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); | |
51a87c55 EVH |
1226 | if (IS_ERR(req)) { |
1227 | err = PTR_ERR(req); | |
1228 | goto error; | |
bd238fb4 LI |
1229 | } |
1230 | ||
342fee1d | 1231 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1232 | if (err) { |
348b5901 | 1233 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1234 | goto free_and_error; |
1235 | } | |
51a87c55 | 1236 | |
ef56547e MK |
1237 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
1238 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, | |
1239 | (unsigned long long)qid.path, qid.version, iounit); | |
bd238fb4 LI |
1240 | |
1241 | fid->mode = mode; | |
51a87c55 | 1242 | fid->iounit = iounit; |
bd238fb4 | 1243 | |
e7f4b8f1 EVH |
1244 | free_and_error: |
1245 | p9_free_req(clnt, req); | |
51a87c55 | 1246 | error: |
bd238fb4 LI |
1247 | return err; |
1248 | } | |
1249 | EXPORT_SYMBOL(p9_client_open); | |
1250 | ||
5643135a VJJ |
1251 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
1252 | gid_t gid, struct p9_qid *qid) | |
1253 | { | |
1254 | int err = 0; | |
1255 | struct p9_client *clnt; | |
1256 | struct p9_req_t *req; | |
1257 | int iounit; | |
1258 | ||
1259 | P9_DPRINTK(P9_DEBUG_9P, | |
1260 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", | |
1261 | ofid->fid, name, flags, mode, gid); | |
1262 | clnt = ofid->clnt; | |
1263 | ||
1264 | if (ofid->mode != -1) | |
1265 | return -EINVAL; | |
1266 | ||
1267 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, | |
1268 | mode, gid); | |
1269 | if (IS_ERR(req)) { | |
1270 | err = PTR_ERR(req); | |
1271 | goto error; | |
1272 | } | |
1273 | ||
1274 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); | |
1275 | if (err) { | |
348b5901 | 1276 | trace_9p_protocol_dump(clnt, req->rc); |
5643135a VJJ |
1277 | goto free_and_error; |
1278 | } | |
1279 | ||
1280 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", | |
1281 | qid->type, | |
1282 | (unsigned long long)qid->path, | |
1283 | qid->version, iounit); | |
1284 | ||
1285 | ofid->mode = mode; | |
1286 | ofid->iounit = iounit; | |
1287 | ||
1288 | free_and_error: | |
1289 | p9_free_req(clnt, req); | |
1290 | error: | |
1291 | return err; | |
1292 | } | |
1293 | EXPORT_SYMBOL(p9_client_create_dotl); | |
1294 | ||
bd238fb4 LI |
1295 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
1296 | char *extension) | |
1297 | { | |
1298 | int err; | |
bd238fb4 | 1299 | struct p9_client *clnt; |
51a87c55 EVH |
1300 | struct p9_req_t *req; |
1301 | struct p9_qid qid; | |
1302 | int iounit; | |
bd238fb4 | 1303 | |
51a87c55 EVH |
1304 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
1305 | fid->fid, name, perm, mode); | |
bd238fb4 | 1306 | err = 0; |
bd238fb4 LI |
1307 | clnt = fid->clnt; |
1308 | ||
1309 | if (fid->mode != -1) | |
1310 | return -EINVAL; | |
1311 | ||
51a87c55 EVH |
1312 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
1313 | mode, extension); | |
1314 | if (IS_ERR(req)) { | |
1315 | err = PTR_ERR(req); | |
1316 | goto error; | |
bd238fb4 LI |
1317 | } |
1318 | ||
342fee1d | 1319 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1 | 1320 | if (err) { |
348b5901 | 1321 | trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1 EVH |
1322 | goto free_and_error; |
1323 | } | |
51a87c55 EVH |
1324 | |
1325 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", | |
b0d5fdef RD |
1326 | qid.type, |
1327 | (unsigned long long)qid.path, | |
1328 | qid.version, iounit); | |
bd238fb4 LI |
1329 | |
1330 | fid->mode = mode; | |
51a87c55 | 1331 | fid->iounit = iounit; |
bd238fb4 | 1332 | |
e7f4b8f1 EVH |
1333 | free_and_error: |
1334 | p9_free_req(clnt, req); | |
51a87c55 | 1335 | error: |
bd238fb4 LI |
1336 | return err; |
1337 | } | |
1338 | EXPORT_SYMBOL(p9_client_fcreate); | |
1339 | ||
50cc42ff VJJ |
1340 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
1341 | struct p9_qid *qid) | |
1342 | { | |
1343 | int err = 0; | |
1344 | struct p9_client *clnt; | |
1345 | struct p9_req_t *req; | |
1346 | ||
1347 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", | |
1348 | dfid->fid, name, symtgt); | |
1349 | clnt = dfid->clnt; | |
1350 | ||
1351 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, | |
1352 | gid); | |
1353 | if (IS_ERR(req)) { | |
1354 | err = PTR_ERR(req); | |
1355 | goto error; | |
1356 | } | |
1357 | ||
1358 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
1359 | if (err) { | |
348b5901 | 1360 | trace_9p_protocol_dump(clnt, req->rc); |
50cc42ff VJJ |
1361 | goto free_and_error; |
1362 | } | |
1363 | ||
1364 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", | |
1365 | qid->type, (unsigned long long)qid->path, qid->version); | |
1366 | ||
1367 | free_and_error: | |
1368 | p9_free_req(clnt, req); | |
1369 | error: | |
1370 | return err; | |
1371 | } | |
1372 | EXPORT_SYMBOL(p9_client_symlink); | |
1373 | ||
652df9a7 VJJ |
1374 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
1375 | { | |
1376 | struct p9_client *clnt; | |
1377 | struct p9_req_t *req; | |
1378 | ||
1379 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", | |
1380 | dfid->fid, oldfid->fid, newname); | |
1381 | clnt = dfid->clnt; | |
1382 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, | |
1383 | newname); | |
1384 | if (IS_ERR(req)) | |
1385 | return PTR_ERR(req); | |
1386 | ||
1387 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); | |
1388 | p9_free_req(clnt, req); | |
1389 | return 0; | |
1390 | } | |
1391 | EXPORT_SYMBOL(p9_client_link); | |
1392 | ||
b165d601 | 1393 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc VJJ |
1394 | { |
1395 | int err; | |
1396 | struct p9_client *clnt; | |
1397 | struct p9_req_t *req; | |
1398 | ||
b165d601 VJJ |
1399 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
1400 | fid->fid, datasync); | |
920e65dc VJJ |
1401 | err = 0; |
1402 | clnt = fid->clnt; | |
1403 | ||
b165d601 | 1404 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc VJJ |
1405 | if (IS_ERR(req)) { |
1406 | err = PTR_ERR(req); | |
1407 | goto error; | |
1408 | } | |
1409 | ||
1410 | P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); | |
1411 | ||
1412 | p9_free_req(clnt, req); | |
1413 | ||
1414 | error: | |
1415 | return err; | |
1416 | } | |
1417 | EXPORT_SYMBOL(p9_client_fsync); | |
1418 | ||
bd238fb4 LI |
1419 | int p9_client_clunk(struct p9_fid *fid) |
1420 | { | |
1421 | int err; | |
bd238fb4 | 1422 | struct p9_client *clnt; |
51a87c55 | 1423 | struct p9_req_t *req; |
bd238fb4 | 1424 | |
8e44a080 | 1425 | if (!fid) { |
1426 | P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); | |
1427 | dump_stack(); | |
1428 | return 0; | |
1429 | } | |
1430 | ||
51a87c55 | 1431 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1432 | err = 0; |
bd238fb4 LI |
1433 | clnt = fid->clnt; |
1434 | ||
51a87c55 EVH |
1435 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
1436 | if (IS_ERR(req)) { | |
1437 | err = PTR_ERR(req); | |
1438 | goto error; | |
bd238fb4 LI |
1439 | } |
1440 | ||
51a87c55 | 1441 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
bd238fb4 | 1442 | |
51a87c55 | 1443 | p9_free_req(clnt, req); |
51a87c55 | 1444 | error: |
5034990e AK |
1445 | /* |
1446 | * Fid is not valid even after a failed clunk | |
1447 | */ | |
1448 | p9_fid_destroy(fid); | |
bd238fb4 LI |
1449 | return err; |
1450 | } | |
1451 | EXPORT_SYMBOL(p9_client_clunk); | |
1452 | ||
1453 | int p9_client_remove(struct p9_fid *fid) | |
1454 | { | |
1455 | int err; | |
bd238fb4 | 1456 | struct p9_client *clnt; |
51a87c55 | 1457 | struct p9_req_t *req; |
bd238fb4 | 1458 | |
51a87c55 | 1459 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1460 | err = 0; |
bd238fb4 LI |
1461 | clnt = fid->clnt; |
1462 | ||
51a87c55 EVH |
1463 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
1464 | if (IS_ERR(req)) { | |
1465 | err = PTR_ERR(req); | |
1466 | goto error; | |
bd238fb4 LI |
1467 | } |
1468 | ||
51a87c55 | 1469 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
bd238fb4 | 1470 | |
51a87c55 | 1471 | p9_free_req(clnt, req); |
51a87c55 | 1472 | error: |
0b1208b1 | 1473 | p9_fid_destroy(fid); |
bd238fb4 LI |
1474 | return err; |
1475 | } | |
1476 | EXPORT_SYMBOL(p9_client_remove); | |
1477 | ||
48e370ff AK |
1478 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
1479 | { | |
1480 | int err = 0; | |
1481 | struct p9_req_t *req; | |
1482 | struct p9_client *clnt; | |
1483 | ||
1484 | P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", | |
1485 | dfid->fid, name, flags); | |
1486 | ||
1487 | clnt = dfid->clnt; | |
1488 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); | |
1489 | if (IS_ERR(req)) { | |
1490 | err = PTR_ERR(req); | |
1491 | goto error; | |
1492 | } | |
1493 | P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); | |
1494 | ||
1495 | p9_free_req(clnt, req); | |
1496 | error: | |
1497 | return err; | |
1498 | } | |
1499 | EXPORT_SYMBOL(p9_client_unlinkat); | |
1500 | ||
0fc9655e EVH |
1501 | int |
1502 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, | |
1503 | u32 count) | |
bd238fb4 | 1504 | { |
51a87c55 | 1505 | char *dataptr; |
abfa034e AK |
1506 | int kernel_buf = 0; |
1507 | struct p9_req_t *req; | |
1508 | struct p9_client *clnt; | |
1509 | int err, rsize, non_zc = 0; | |
1510 | ||
bd238fb4 | 1511 | |
abfa034e AK |
1512 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
1513 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1514 | err = 0; |
bd238fb4 | 1515 | clnt = fid->clnt; |
bd238fb4 LI |
1516 | |
1517 | rsize = fid->iounit; | |
1518 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1519 | rsize = clnt->msize - P9_IOHDRSZ; | |
1520 | ||
51a87c55 EVH |
1521 | if (count < rsize) |
1522 | rsize = count; | |
bd238fb4 | 1523 | |
aca00763 | 1524 | /* Don't bother zerocopy for small IO (< 1024) */ |
abfa034e AK |
1525 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
1526 | char *indata; | |
1527 | if (data) { | |
1528 | kernel_buf = 1; | |
1529 | indata = data; | |
1530 | } else | |
1531 | indata = (char *)udata; | |
1532 | /* | |
1533 | * response header len is 11 | |
1534 | * PDU Header(7) + IO Size (4) | |
1535 | */ | |
1536 | req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0, | |
1537 | 11, kernel_buf, "dqd", fid->fid, | |
1538 | offset, rsize); | |
bb2f8a55 | 1539 | } else { |
abfa034e | 1540 | non_zc = 1; |
bb2f8a55 | 1541 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, |
abfa034e | 1542 | rsize); |
bb2f8a55 | 1543 | } |
51a87c55 EVH |
1544 | if (IS_ERR(req)) { |
1545 | err = PTR_ERR(req); | |
1546 | goto error; | |
1547 | } | |
bd238fb4 | 1548 | |
342fee1d | 1549 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
e7f4b8f1 | 1550 | if (err) { |
348b5901 | 1551 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1552 | goto free_and_error; |
e7f4b8f1 | 1553 | } |
bd238fb4 | 1554 | |
51a87c55 | 1555 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
bd238fb4 | 1556 | |
abfa034e | 1557 | if (non_zc) { |
bb2f8a55 VJJ |
1558 | if (data) { |
1559 | memmove(data, dataptr, count); | |
1560 | } else { | |
1561 | err = copy_to_user(udata, dataptr, count); | |
1562 | if (err) { | |
1563 | err = -EFAULT; | |
1564 | goto free_and_error; | |
1565 | } | |
bd238fb4 | 1566 | } |
51a87c55 | 1567 | } |
51a87c55 EVH |
1568 | p9_free_req(clnt, req); |
1569 | return count; | |
bd238fb4 | 1570 | |
51a87c55 EVH |
1571 | free_and_error: |
1572 | p9_free_req(clnt, req); | |
bd238fb4 | 1573 | error: |
bd238fb4 LI |
1574 | return err; |
1575 | } | |
0fc9655e | 1576 | EXPORT_SYMBOL(p9_client_read); |
bd238fb4 LI |
1577 | |
1578 | int | |
0fc9655e EVH |
1579 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
1580 | u64 offset, u32 count) | |
bd238fb4 | 1581 | { |
095d3da6 | 1582 | int err, rsize; |
abfa034e | 1583 | int kernel_buf = 0; |
bd238fb4 | 1584 | struct p9_client *clnt; |
51a87c55 | 1585 | struct p9_req_t *req; |
bd238fb4 | 1586 | |
51a87c55 EVH |
1587 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
1588 | fid->fid, (long long unsigned) offset, count); | |
bd238fb4 | 1589 | err = 0; |
bd238fb4 | 1590 | clnt = fid->clnt; |
bd238fb4 LI |
1591 | |
1592 | rsize = fid->iounit; | |
1593 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) | |
1594 | rsize = clnt->msize - P9_IOHDRSZ; | |
1595 | ||
51a87c55 EVH |
1596 | if (count < rsize) |
1597 | rsize = count; | |
1fc52481 | 1598 | |
abfa034e AK |
1599 | /* Don't bother zerocopy for small IO (< 1024) */ |
1600 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
1601 | char *odata; | |
1602 | if (data) { | |
1603 | kernel_buf = 1; | |
1604 | odata = data; | |
1605 | } else | |
1606 | odata = (char *)udata; | |
1607 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize, | |
1608 | P9_ZC_HDR_SZ, kernel_buf, "dqd", | |
1609 | fid->fid, offset, rsize); | |
1fc52481 | 1610 | } else { |
1fc52481 VJJ |
1611 | if (data) |
1612 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, | |
abfa034e | 1613 | offset, rsize, data); |
1fc52481 VJJ |
1614 | else |
1615 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, | |
abfa034e | 1616 | offset, rsize, udata); |
1fc52481 | 1617 | } |
51a87c55 EVH |
1618 | if (IS_ERR(req)) { |
1619 | err = PTR_ERR(req); | |
1620 | goto error; | |
1621 | } | |
0fc9655e | 1622 | |
342fee1d | 1623 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
e7f4b8f1 | 1624 | if (err) { |
348b5901 | 1625 | trace_9p_protocol_dump(clnt, req->rc); |
51a87c55 | 1626 | goto free_and_error; |
e7f4b8f1 EVH |
1627 | } |
1628 | ||
51a87c55 | 1629 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
bd238fb4 | 1630 | |
51a87c55 EVH |
1631 | p9_free_req(clnt, req); |
1632 | return count; | |
bd238fb4 | 1633 | |
51a87c55 EVH |
1634 | free_and_error: |
1635 | p9_free_req(clnt, req); | |
bd238fb4 | 1636 | error: |
bd238fb4 LI |
1637 | return err; |
1638 | } | |
0fc9655e | 1639 | EXPORT_SYMBOL(p9_client_write); |
bd238fb4 | 1640 | |
51a87c55 | 1641 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac56 | 1642 | { |
51a87c55 EVH |
1643 | int err; |
1644 | struct p9_client *clnt; | |
1645 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); | |
1646 | struct p9_req_t *req; | |
1647 | u16 ignored; | |
5503ac56 | 1648 | |
51a87c55 | 1649 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
5503ac56 | 1650 | |
5503ac56 EVH |
1651 | if (!ret) |
1652 | return ERR_PTR(-ENOMEM); | |
1653 | ||
bd238fb4 | 1654 | err = 0; |
bd238fb4 LI |
1655 | clnt = fid->clnt; |
1656 | ||
51a87c55 EVH |
1657 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
1658 | if (IS_ERR(req)) { | |
1659 | err = PTR_ERR(req); | |
bd238fb4 LI |
1660 | goto error; |
1661 | } | |
1662 | ||
342fee1d | 1663 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1 | 1664 | if (err) { |
348b5901 | 1665 | trace_9p_protocol_dump(clnt, req->rc); |
eedfe1c4 AK |
1666 | p9_free_req(clnt, req); |
1667 | goto error; | |
e7f4b8f1 | 1668 | } |
bd238fb4 | 1669 | |
51a87c55 | 1670 | P9_DPRINTK(P9_DEBUG_9P, |
e7f4b8f1 EVH |
1671 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
1672 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1673 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1674 | "<<< uid=%d gid=%d n_muid=%d\n", | |
51a87c55 | 1675 | ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef RD |
1676 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
1677 | ret->atime, ret->mtime, (unsigned long long)ret->length, | |
1678 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, | |
e7f4b8f1 | 1679 | ret->n_uid, ret->n_gid, ret->n_muid); |
bd238fb4 | 1680 | |
742b11a7 LI |
1681 | p9_free_req(clnt, req); |
1682 | return ret; | |
1683 | ||
bd238fb4 | 1684 | error: |
742b11a7 LI |
1685 | kfree(ret); |
1686 | return ERR_PTR(err); | |
bd238fb4 LI |
1687 | } |
1688 | EXPORT_SYMBOL(p9_client_stat); | |
1689 | ||
f0853122 SK |
1690 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
1691 | u64 request_mask) | |
1692 | { | |
1693 | int err; | |
1694 | struct p9_client *clnt; | |
1695 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), | |
1696 | GFP_KERNEL); | |
1697 | struct p9_req_t *req; | |
1698 | ||
1699 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", | |
1700 | fid->fid, request_mask); | |
1701 | ||
1702 | if (!ret) | |
1703 | return ERR_PTR(-ENOMEM); | |
1704 | ||
1705 | err = 0; | |
1706 | clnt = fid->clnt; | |
1707 | ||
1708 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); | |
1709 | if (IS_ERR(req)) { | |
1710 | err = PTR_ERR(req); | |
1711 | goto error; | |
1712 | } | |
1713 | ||
1714 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); | |
1715 | if (err) { | |
348b5901 | 1716 | trace_9p_protocol_dump(clnt, req->rc); |
f0853122 SK |
1717 | p9_free_req(clnt, req); |
1718 | goto error; | |
1719 | } | |
1720 | ||
1721 | P9_DPRINTK(P9_DEBUG_9P, | |
1722 | "<<< RGETATTR st_result_mask=%lld\n" | |
1723 | "<<< qid=%x.%llx.%x\n" | |
1724 | "<<< st_mode=%8.8x st_nlink=%llu\n" | |
1725 | "<<< st_uid=%d st_gid=%d\n" | |
1726 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" | |
1727 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" | |
1728 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" | |
1729 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" | |
1730 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" | |
1731 | "<<< st_gen=%lld st_data_version=%lld", | |
1732 | ret->st_result_mask, ret->qid.type, ret->qid.path, | |
1733 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, | |
1734 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, | |
1735 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, | |
1736 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, | |
1737 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, | |
1738 | ret->st_gen, ret->st_data_version); | |
1739 | ||
1740 | p9_free_req(clnt, req); | |
1741 | return ret; | |
1742 | ||
1743 | error: | |
1744 | kfree(ret); | |
1745 | return ERR_PTR(err); | |
1746 | } | |
1747 | EXPORT_SYMBOL(p9_client_getattr_dotl); | |
1748 | ||
342fee1d | 1749 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d LI |
1750 | { |
1751 | int ret; | |
1752 | ||
9d6939da | 1753 | /* NOTE: size shouldn't include its own length */ |
453ed90d LI |
1754 | /* size[2] type[2] dev[4] qid[13] */ |
1755 | /* mode[4] atime[4] mtime[4] length[8]*/ | |
1756 | /* name[s] uid[s] gid[s] muid[s] */ | |
9d6939da | 1757 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d LI |
1758 | |
1759 | if (wst->name) | |
1760 | ret += strlen(wst->name); | |
1761 | if (wst->uid) | |
1762 | ret += strlen(wst->uid); | |
1763 | if (wst->gid) | |
1764 | ret += strlen(wst->gid); | |
1765 | if (wst->muid) | |
1766 | ret += strlen(wst->muid); | |
1767 | ||
c56e4acf SK |
1768 | if ((proto_version == p9_proto_2000u) || |
1769 | (proto_version == p9_proto_2000L)) { | |
453ed90d LI |
1770 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
1771 | if (wst->extension) | |
1772 | ret += strlen(wst->extension); | |
1773 | } | |
1774 | ||
1775 | return ret; | |
1776 | } | |
1777 | ||
bd238fb4 LI |
1778 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
1779 | { | |
1780 | int err; | |
51a87c55 | 1781 | struct p9_req_t *req; |
bd238fb4 LI |
1782 | struct p9_client *clnt; |
1783 | ||
453ed90d LI |
1784 | err = 0; |
1785 | clnt = fid->clnt; | |
342fee1d | 1786 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
51a87c55 | 1787 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
e7f4b8f1 EVH |
1788 | P9_DPRINTK(P9_DEBUG_9P, |
1789 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" | |
1790 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" | |
1791 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" | |
1792 | " uid=%d gid=%d n_muid=%d\n", | |
1793 | wst->size, wst->type, wst->dev, wst->qid.type, | |
b0d5fdef RD |
1794 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
1795 | wst->atime, wst->mtime, (unsigned long long)wst->length, | |
1796 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, | |
e7f4b8f1 | 1797 | wst->n_uid, wst->n_gid, wst->n_muid); |
bd238fb4 | 1798 | |
9d6939da | 1799 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c55 EVH |
1800 | if (IS_ERR(req)) { |
1801 | err = PTR_ERR(req); | |
1802 | goto error; | |
bd238fb4 LI |
1803 | } |
1804 | ||
51a87c55 | 1805 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
bd238fb4 | 1806 | |
51a87c55 EVH |
1807 | p9_free_req(clnt, req); |
1808 | error: | |
bd238fb4 LI |
1809 | return err; |
1810 | } | |
1811 | EXPORT_SYMBOL(p9_client_wstat); | |
bda8e775 | 1812 | |
87d7845a SK |
1813 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
1814 | { | |
1815 | int err; | |
1816 | struct p9_req_t *req; | |
1817 | struct p9_client *clnt; | |
1818 | ||
1819 | err = 0; | |
1820 | clnt = fid->clnt; | |
1821 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); | |
1822 | P9_DPRINTK(P9_DEBUG_9P, | |
1823 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" | |
1824 | " atime_sec=%lld atime_nsec=%lld\n" | |
1825 | " mtime_sec=%lld mtime_nsec=%lld\n", | |
1826 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, | |
1827 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, | |
1828 | p9attr->mtime_sec, p9attr->mtime_nsec); | |
1829 | ||
1830 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); | |
1831 | ||
1832 | if (IS_ERR(req)) { | |
1833 | err = PTR_ERR(req); | |
1834 | goto error; | |
1835 | } | |
1836 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); | |
1837 | p9_free_req(clnt, req); | |
1838 | error: | |
1839 | return err; | |
1840 | } | |
1841 | EXPORT_SYMBOL(p9_client_setattr); | |
1842 | ||
bda8e775 SK |
1843 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
1844 | { | |
1845 | int err; | |
1846 | struct p9_req_t *req; | |
1847 | struct p9_client *clnt; | |
1848 | ||
1849 | err = 0; | |
1850 | clnt = fid->clnt; | |
1851 | ||
1852 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); | |
1853 | ||
1854 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); | |
1855 | if (IS_ERR(req)) { | |
1856 | err = PTR_ERR(req); | |
1857 | goto error; | |
1858 | } | |
1859 | ||
1860 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, | |
1861 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, | |
1862 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); | |
1863 | if (err) { | |
348b5901 | 1864 | trace_9p_protocol_dump(clnt, req->rc); |
bda8e775 SK |
1865 | p9_free_req(clnt, req); |
1866 | goto error; | |
1867 | } | |
1868 | ||
1869 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " | |
1870 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " | |
1871 | "fsid %llu namelen %ld\n", | |
1872 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, | |
1873 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, | |
1874 | sb->fsid, (long int)sb->namelen); | |
1875 | ||
1876 | p9_free_req(clnt, req); | |
1877 | error: | |
1878 | return err; | |
1879 | } | |
1880 | EXPORT_SYMBOL(p9_client_statfs); | |
4681dbda | 1881 | |
9e8fb38e AK |
1882 | int p9_client_rename(struct p9_fid *fid, |
1883 | struct p9_fid *newdirfid, const char *name) | |
4681dbda SK |
1884 | { |
1885 | int err; | |
1886 | struct p9_req_t *req; | |
1887 | struct p9_client *clnt; | |
1888 | ||
1889 | err = 0; | |
1890 | clnt = fid->clnt; | |
1891 | ||
1892 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", | |
1893 | fid->fid, newdirfid->fid, name); | |
1894 | ||
1895 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, | |
1896 | newdirfid->fid, name); | |
1897 | if (IS_ERR(req)) { | |
1898 | err = PTR_ERR(req); | |
1899 | goto error; | |
1900 | } | |
1901 | ||
1902 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); | |
1903 | ||
1904 | p9_free_req(clnt, req); | |
1905 | error: | |
1906 | return err; | |
1907 | } | |
1908 | EXPORT_SYMBOL(p9_client_rename); | |
1909 | ||
9e8fb38e AK |
1910 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
1911 | struct p9_fid *newdirfid, const char *new_name) | |
1912 | { | |
1913 | int err; | |
1914 | struct p9_req_t *req; | |
1915 | struct p9_client *clnt; | |
1916 | ||
1917 | err = 0; | |
1918 | clnt = olddirfid->clnt; | |
1919 | ||
1920 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" | |
1921 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, | |
1922 | newdirfid->fid, new_name); | |
1923 | ||
1924 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, | |
1925 | old_name, newdirfid->fid, new_name); | |
1926 | if (IS_ERR(req)) { | |
1927 | err = PTR_ERR(req); | |
1928 | goto error; | |
1929 | } | |
1930 | ||
1931 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", | |
1932 | newdirfid->fid, new_name); | |
1933 | ||
1934 | p9_free_req(clnt, req); | |
1935 | error: | |
1936 | return err; | |
1937 | } | |
1938 | EXPORT_SYMBOL(p9_client_renameat); | |
1939 | ||
0ef63f34 AK |
1940 | /* |
1941 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace | |
1942 | */ | |
1943 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, | |
1944 | const char *attr_name, u64 *attr_size) | |
1945 | { | |
1946 | int err; | |
1947 | struct p9_req_t *req; | |
1948 | struct p9_client *clnt; | |
1949 | struct p9_fid *attr_fid; | |
1950 | ||
1951 | err = 0; | |
1952 | clnt = file_fid->clnt; | |
1953 | attr_fid = p9_fid_create(clnt); | |
1954 | if (IS_ERR(attr_fid)) { | |
1955 | err = PTR_ERR(attr_fid); | |
1956 | attr_fid = NULL; | |
1957 | goto error; | |
1958 | } | |
1959 | P9_DPRINTK(P9_DEBUG_9P, | |
1960 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", | |
1961 | file_fid->fid, attr_fid->fid, attr_name); | |
1962 | ||
1963 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", | |
1964 | file_fid->fid, attr_fid->fid, attr_name); | |
1965 | if (IS_ERR(req)) { | |
1966 | err = PTR_ERR(req); | |
1967 | goto error; | |
1968 | } | |
1969 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); | |
1970 | if (err) { | |
348b5901 | 1971 | trace_9p_protocol_dump(clnt, req->rc); |
0ef63f34 AK |
1972 | p9_free_req(clnt, req); |
1973 | goto clunk_fid; | |
1974 | } | |
1975 | p9_free_req(clnt, req); | |
1976 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", | |
1977 | attr_fid->fid, *attr_size); | |
1978 | return attr_fid; | |
1979 | clunk_fid: | |
1980 | p9_client_clunk(attr_fid); | |
1981 | attr_fid = NULL; | |
1982 | error: | |
1983 | if (attr_fid && (attr_fid != file_fid)) | |
1984 | p9_fid_destroy(attr_fid); | |
1985 | ||
1986 | return ERR_PTR(err); | |
1987 | } | |
1988 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); | |
1989 | ||
eda25e46 AK |
1990 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
1991 | u64 attr_size, int flags) | |
1992 | { | |
1993 | int err; | |
1994 | struct p9_req_t *req; | |
1995 | struct p9_client *clnt; | |
1996 | ||
1997 | P9_DPRINTK(P9_DEBUG_9P, | |
1998 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", | |
1999 | fid->fid, name, (long long)attr_size, flags); | |
2000 | err = 0; | |
2001 | clnt = fid->clnt; | |
2002 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", | |
2003 | fid->fid, name, attr_size, flags); | |
2004 | if (IS_ERR(req)) { | |
2005 | err = PTR_ERR(req); | |
2006 | goto error; | |
2007 | } | |
2008 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); | |
2009 | p9_free_req(clnt, req); | |
2010 | error: | |
2011 | return err; | |
2012 | } | |
2013 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); | |
2014 | ||
7751bdb3 SK |
2015 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
2016 | { | |
abfa034e | 2017 | int err, rsize, non_zc = 0; |
7751bdb3 SK |
2018 | struct p9_client *clnt; |
2019 | struct p9_req_t *req; | |
2020 | char *dataptr; | |
2021 | ||
2022 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", | |
2023 | fid->fid, (long long unsigned) offset, count); | |
2024 | ||
2025 | err = 0; | |
2026 | clnt = fid->clnt; | |
7751bdb3 SK |
2027 | |
2028 | rsize = fid->iounit; | |
2029 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) | |
2030 | rsize = clnt->msize - P9_READDIRHDRSZ; | |
2031 | ||
2032 | if (count < rsize) | |
2033 | rsize = count; | |
2034 | ||
abfa034e AK |
2035 | /* Don't bother zerocopy for small IO (< 1024) */ |
2036 | if (clnt->trans_mod->zc_request && rsize > 1024) { | |
2037 | /* | |
2038 | * response header len is 11 | |
2039 | * PDU Header(7) + IO Size (4) | |
2040 | */ | |
2041 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0, | |
2042 | 11, 1, "dqd", fid->fid, offset, rsize); | |
2c66523f | 2043 | } else { |
abfa034e | 2044 | non_zc = 1; |
2c66523f | 2045 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e | 2046 | offset, rsize); |
2c66523f | 2047 | } |
7751bdb3 SK |
2048 | if (IS_ERR(req)) { |
2049 | err = PTR_ERR(req); | |
2050 | goto error; | |
2051 | } | |
2052 | ||
2053 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); | |
2054 | if (err) { | |
348b5901 | 2055 | trace_9p_protocol_dump(clnt, req->rc); |
7751bdb3 SK |
2056 | goto free_and_error; |
2057 | } | |
2058 | ||
2059 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); | |
2060 | ||
abfa034e | 2061 | if (non_zc) |
7751bdb3 SK |
2062 | memmove(data, dataptr, count); |
2063 | ||
2064 | p9_free_req(clnt, req); | |
2065 | return count; | |
2066 | ||
2067 | free_and_error: | |
2068 | p9_free_req(clnt, req); | |
2069 | error: | |
2070 | return err; | |
2071 | } | |
2072 | EXPORT_SYMBOL(p9_client_readdir); | |
4b43516a MK |
2073 | |
2074 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, | |
2075 | dev_t rdev, gid_t gid, struct p9_qid *qid) | |
2076 | { | |
2077 | int err; | |
2078 | struct p9_client *clnt; | |
2079 | struct p9_req_t *req; | |
2080 | ||
2081 | err = 0; | |
2082 | clnt = fid->clnt; | |
2083 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " | |
2084 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); | |
2085 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, | |
2086 | MAJOR(rdev), MINOR(rdev), gid); | |
2087 | if (IS_ERR(req)) | |
2088 | return PTR_ERR(req); | |
2089 | ||
2090 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2091 | if (err) { | |
348b5901 | 2092 | trace_9p_protocol_dump(clnt, req->rc); |
4b43516a MK |
2093 | goto error; |
2094 | } | |
2095 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, | |
2096 | (unsigned long long)qid->path, qid->version); | |
2097 | ||
2098 | error: | |
2099 | p9_free_req(clnt, req); | |
2100 | return err; | |
2101 | ||
2102 | } | |
2103 | EXPORT_SYMBOL(p9_client_mknod_dotl); | |
01a622bd MK |
2104 | |
2105 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, | |
2106 | gid_t gid, struct p9_qid *qid) | |
2107 | { | |
2108 | int err; | |
2109 | struct p9_client *clnt; | |
2110 | struct p9_req_t *req; | |
2111 | ||
2112 | err = 0; | |
2113 | clnt = fid->clnt; | |
2114 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", | |
2115 | fid->fid, name, mode, gid); | |
2116 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, | |
2117 | gid); | |
2118 | if (IS_ERR(req)) | |
2119 | return PTR_ERR(req); | |
2120 | ||
2121 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); | |
2122 | if (err) { | |
348b5901 | 2123 | trace_9p_protocol_dump(clnt, req->rc); |
01a622bd MK |
2124 | goto error; |
2125 | } | |
2126 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, | |
2127 | (unsigned long long)qid->path, qid->version); | |
2128 | ||
2129 | error: | |
2130 | p9_free_req(clnt, req); | |
2131 | return err; | |
2132 | ||
2133 | } | |
2134 | EXPORT_SYMBOL(p9_client_mkdir_dotl); | |
a099027c MK |
2135 | |
2136 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) | |
2137 | { | |
2138 | int err; | |
2139 | struct p9_client *clnt; | |
2140 | struct p9_req_t *req; | |
2141 | ||
2142 | err = 0; | |
2143 | clnt = fid->clnt; | |
2144 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " | |
2145 | "start %lld length %lld proc_id %d client_id %s\n", | |
2146 | fid->fid, flock->type, flock->flags, flock->start, | |
2147 | flock->length, flock->proc_id, flock->client_id); | |
2148 | ||
2149 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, | |
2150 | flock->flags, flock->start, flock->length, | |
2151 | flock->proc_id, flock->client_id); | |
2152 | ||
2153 | if (IS_ERR(req)) | |
2154 | return PTR_ERR(req); | |
2155 | ||
2156 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); | |
2157 | if (err) { | |
348b5901 | 2158 | trace_9p_protocol_dump(clnt, req->rc); |
a099027c MK |
2159 | goto error; |
2160 | } | |
2161 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); | |
2162 | error: | |
2163 | p9_free_req(clnt, req); | |
2164 | return err; | |
2165 | ||
2166 | } | |
2167 | EXPORT_SYMBOL(p9_client_lock_dotl); | |
1d769cd1 MK |
2168 | |
2169 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) | |
2170 | { | |
2171 | int err; | |
2172 | struct p9_client *clnt; | |
2173 | struct p9_req_t *req; | |
2174 | ||
2175 | err = 0; | |
2176 | clnt = fid->clnt; | |
2177 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " | |
2178 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, | |
2179 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2180 | ||
2181 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, | |
2182 | glock->start, glock->length, glock->proc_id, glock->client_id); | |
2183 | ||
2184 | if (IS_ERR(req)) | |
2185 | return PTR_ERR(req); | |
2186 | ||
2187 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, | |
2188 | &glock->start, &glock->length, &glock->proc_id, | |
2189 | &glock->client_id); | |
2190 | if (err) { | |
348b5901 | 2191 | trace_9p_protocol_dump(clnt, req->rc); |
1d769cd1 MK |
2192 | goto error; |
2193 | } | |
2194 | P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " | |
2195 | "proc_id %d client_id %s\n", glock->type, glock->start, | |
2196 | glock->length, glock->proc_id, glock->client_id); | |
2197 | error: | |
2198 | p9_free_req(clnt, req); | |
2199 | return err; | |
2200 | } | |
2201 | EXPORT_SYMBOL(p9_client_getlock_dotl); | |
329176cc MK |
2202 | |
2203 | int p9_client_readlink(struct p9_fid *fid, char **target) | |
2204 | { | |
2205 | int err; | |
2206 | struct p9_client *clnt; | |
2207 | struct p9_req_t *req; | |
2208 | ||
2209 | err = 0; | |
2210 | clnt = fid->clnt; | |
2211 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); | |
2212 | ||
2213 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); | |
2214 | if (IS_ERR(req)) | |
2215 | return PTR_ERR(req); | |
2216 | ||
2217 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); | |
2218 | if (err) { | |
348b5901 | 2219 | trace_9p_protocol_dump(clnt, req->rc); |
329176cc MK |
2220 | goto error; |
2221 | } | |
2222 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); | |
2223 | error: | |
2224 | p9_free_req(clnt, req); | |
2225 | return err; | |
2226 | } | |
2227 | EXPORT_SYMBOL(p9_client_readlink); |