6 * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
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.
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.
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
26 #include <linux/module.h>
27 #include <linux/errno.h>
29 #include <linux/poll.h>
30 #include <linux/idr.h>
31 #include <linux/mutex.h>
32 #include <linux/sched.h>
33 #include <linux/uaccess.h>
34 #include <net/9p/9p.h>
35 #include <linux/parser.h>
36 #include <net/9p/client.h>
37 #include <net/9p/transport.h>
41 * Client Option Parsing (code inspired by NFS code)
42 * - a little lazy - parse all client options
52 static const match_table_t tokens = {
53 {Opt_msize, "msize=%u"},
54 {Opt_legacy, "noextend"},
55 {Opt_trans, "trans=%s"},
59 static struct p9_req_t *
60 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...);
63 * v9fs_parse_options - parse mount options into session structure
64 * @options: options string passed from mount
65 * @v9ses: existing v9fs session information
67 * Return 0 upon success, -ERRNO upon failure
70 static int parse_opts(char *opts, struct p9_client *clnt)
74 substring_t args[MAX_OPT_ARGS];
84 options = kstrdup(opts, GFP_KERNEL);
86 P9_DPRINTK(P9_DEBUG_ERROR,
87 "failed to allocate copy of option string\n");
91 while ((p = strsep(&options, ",")) != NULL) {
95 token = match_token(p, tokens, args);
96 if (token < Opt_trans) {
97 int r = match_int(&args[0], &option);
99 P9_DPRINTK(P9_DEBUG_ERROR,
100 "integer field, but no integer?\n");
107 clnt->msize = option;
110 clnt->trans_mod = v9fs_get_trans_by_name(&args[0]);
120 if (!clnt->trans_mod)
121 clnt->trans_mod = v9fs_get_default_trans();
128 * p9_tag_alloc - lookup/allocate a request by tag
129 * @c: client session to lookup tag within
130 * @tag: numeric id for transaction
132 * this is a simple array lookup, but will grow the
133 * request_slots as necessary to accomodate transaction
134 * ids which did not previously have a slot.
136 * this code relies on the client spinlock to manage locks, its
137 * possible we should switch to something else, but I'd rather
138 * stick with something low-overhead for the common case.
142 static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
146 struct p9_req_t *req;
148 /* This looks up the original request by tag so we know which
149 * buffer to read the data into */
152 if (tag >= c->max_tag) {
153 spin_lock_irqsave(&c->lock, flags);
154 /* check again since original check was outside of lock */
155 while (tag >= c->max_tag) {
156 row = (tag / P9_ROW_MAXTAG);
157 c->reqs[row] = kcalloc(P9_ROW_MAXTAG,
158 sizeof(struct p9_req_t), GFP_ATOMIC);
161 printk(KERN_ERR "Couldn't grow tag array\n");
162 spin_unlock_irqrestore(&c->lock, flags);
163 return ERR_PTR(-ENOMEM);
165 for (col = 0; col < P9_ROW_MAXTAG; col++) {
166 c->reqs[row][col].status = REQ_STATUS_IDLE;
167 c->reqs[row][col].tc = NULL;
169 c->max_tag += P9_ROW_MAXTAG;
171 spin_unlock_irqrestore(&c->lock, flags);
173 row = tag / P9_ROW_MAXTAG;
174 col = tag % P9_ROW_MAXTAG;
176 req = &c->reqs[row][col];
178 req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
180 printk(KERN_ERR "Couldn't grow tag array\n");
181 return ERR_PTR(-ENOMEM);
183 init_waitqueue_head(req->wq);
184 req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize,
186 req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize,
188 if ((!req->tc) || (!req->rc)) {
189 printk(KERN_ERR "Couldn't grow tag array\n");
192 return ERR_PTR(-ENOMEM);
194 req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
195 req->tc->capacity = c->msize;
196 req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
197 req->rc->capacity = c->msize;
200 p9pdu_reset(req->tc);
201 p9pdu_reset(req->rc);
204 req->tc->tag = tag-1;
205 req->status = REQ_STATUS_ALLOC;
207 return &c->reqs[row][col];
211 * p9_tag_lookup - lookup a request by tag
212 * @c: client session to lookup tag within
213 * @tag: numeric id for transaction
217 struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
221 /* This looks up the original request by tag so we know which
222 * buffer to read the data into */
225 BUG_ON(tag >= c->max_tag);
227 row = tag / P9_ROW_MAXTAG;
228 col = tag % P9_ROW_MAXTAG;
230 return &c->reqs[row][col];
232 EXPORT_SYMBOL(p9_tag_lookup);
235 * p9_tag_init - setup tags structure and contents
236 * @tags: tags structure from the client struct
238 * This initializes the tags structure for each client instance.
242 static int p9_tag_init(struct p9_client *c)
246 c->tagpool = p9_idpool_create();
247 if (IS_ERR(c->tagpool)) {
248 err = PTR_ERR(c->tagpool);
253 p9_idpool_get(c->tagpool); /* reserve tag 0 */
261 * p9_tag_cleanup - cleans up tags structure and reclaims resources
262 * @tags: tags structure from the client struct
264 * This frees resources associated with the tags structure
267 static void p9_tag_cleanup(struct p9_client *c)
271 /* check to insure all requests are idle */
272 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
273 for (col = 0; col < P9_ROW_MAXTAG; col++) {
274 if (c->reqs[row][col].status != REQ_STATUS_IDLE) {
275 P9_DPRINTK(P9_DEBUG_MUX,
276 "Attempting to cleanup non-free tag %d,%d\n",
278 /* TODO: delay execution of cleanup */
285 p9_idpool_destroy(c->tagpool);
287 /* free requests associated with tags */
288 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
289 for (col = 0; col < P9_ROW_MAXTAG; col++) {
290 kfree(c->reqs[row][col].wq);
291 kfree(c->reqs[row][col].tc);
292 kfree(c->reqs[row][col].rc);
300 * p9_free_req - free a request and clean-up as necessary
302 * r: request to release
306 static void p9_free_req(struct p9_client *c, struct p9_req_t *r)
308 int tag = r->tc->tag;
309 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag);
311 r->status = REQ_STATUS_IDLE;
312 if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool))
313 p9_idpool_put(tag, c->tagpool);
315 /* if this was a flush request we have to free response fcall */
316 if (r->rc->id == P9_RFLUSH) {
323 * p9_client_cb - call back from transport to client
325 * req: request received
328 void p9_client_cb(struct p9_client *c, struct p9_req_t *req)
330 struct p9_req_t *other_req;
333 P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag);
335 if (req->status == REQ_STATUS_ERROR)
338 if (req->flush_tag) { /* flush receive path */
339 P9_DPRINTK(P9_DEBUG_9P, "<<< RFLUSH %d\n", req->tc->tag);
340 spin_lock_irqsave(&c->lock, flags);
341 other_req = p9_tag_lookup(c, req->flush_tag);
342 if (other_req->status != REQ_STATUS_FLSH) /* stale flush */
343 spin_unlock_irqrestore(&c->lock, flags);
345 other_req->status = REQ_STATUS_FLSHD;
346 spin_unlock_irqrestore(&c->lock, flags);
347 wake_up(other_req->wq);
350 } else { /* normal receive path */
351 P9_DPRINTK(P9_DEBUG_MUX, "normal: tag %d\n", req->tc->tag);
352 spin_lock_irqsave(&c->lock, flags);
353 if (req->status != REQ_STATUS_FLSHD)
354 req->status = REQ_STATUS_RCVD;
355 spin_unlock_irqrestore(&c->lock, flags);
357 P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
360 EXPORT_SYMBOL(p9_client_cb);
363 * p9_parse_header - parse header arguments out of a packet
364 * @pdu: packet to parse
365 * @size: size of packet
366 * @type: type of request
367 * @tag: tag of packet
368 * @rewind: set if we need to rewind offset afterwards
372 p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag,
378 int offset = pdu->offset;
385 err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag);
387 goto rewind_and_exit;
393 P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size,
406 pdu->offset = offset;
409 EXPORT_SYMBOL(p9_parse_header);
412 * p9_check_errors - check 9p packet for error return and process it
413 * @c: current client instance
414 * @req: request to parse and check for error conditions
416 * returns error code if one is discovered, otherwise returns 0
418 * this will have to be more complicated if we have multiple
422 static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
427 err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
429 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
433 if (type == P9_RERROR) {
437 err = p9pdu_readf(req->rc, c->dotu, "s?d", &ename, &ecode);
439 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
448 err = p9_errstr2errno(ename, strlen(ename));
450 /* string match failed */
455 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
465 * p9_client_flush - flush (cancel) a request
467 * req: request to cancel
469 * This sents a flush for a particular requests and links
470 * the flush request to the original request. The current
471 * code only supports a single flush request although the protocol
472 * allows for multiple flush requests to be sent for a single request.
476 static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
478 struct p9_req_t *req;
482 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
486 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
488 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
492 req->flush_tag = oldtag;
494 /* we don't free anything here because RPC isn't complete */
499 * p9_client_rpc - issue a request and wait for a response
501 * @type: type of request
502 * @fmt: protocol format string (see protocol.c)
504 * Returns request structure (which client must free using p9_free_req)
507 static struct p9_req_t *
508 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
512 struct p9_req_t *req;
517 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
519 if (c->status != Connected)
520 return ERR_PTR(-EIO);
522 if (signal_pending(current)) {
524 clear_thread_flag(TIF_SIGPENDING);
529 if (type != P9_TVERSION) {
530 tag = p9_idpool_get(c->tagpool);
532 return ERR_PTR(-ENOMEM);
535 req = p9_tag_alloc(c, tag);
539 /* marshall the data */
540 p9pdu_prepare(req->tc, tag, type);
542 err = p9pdu_vwritef(req->tc, c->dotu, fmt, ap);
544 p9pdu_finalize(req->tc);
546 err = c->trans_mod->request(c, req);
548 c->status = Disconnected;
552 /* if it was a flush we just transmitted, return our tag */
553 if (type == P9_TFLUSH)
556 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag);
557 err = wait_event_interruptible(*req->wq,
558 req->status >= REQ_STATUS_RCVD);
559 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d (flushed=%d)\n",
560 req->wq, tag, err, flushed);
562 if (req->status == REQ_STATUS_ERROR) {
563 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
565 } else if (err == -ERESTARTSYS && flushed) {
566 P9_DPRINTK(P9_DEBUG_MUX, "flushed - going again\n");
568 } else if (req->status == REQ_STATUS_FLSHD) {
569 P9_DPRINTK(P9_DEBUG_MUX, "flushed - erestartsys\n");
573 if ((err == -ERESTARTSYS) && (c->status == Connected) && (!flushed)) {
574 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
575 spin_lock_irqsave(&c->lock, flags);
576 if (req->status == REQ_STATUS_SENT)
577 req->status = REQ_STATUS_FLSH;
578 spin_unlock_irqrestore(&c->lock, flags);
581 clear_thread_flag(TIF_SIGPENDING);
583 if (c->trans_mod->cancel(c, req)) {
584 err = p9_client_flush(c, req);
591 spin_lock_irqsave(¤t->sighand->siglock, flags);
593 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
599 err = p9_check_errors(c, req);
601 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
606 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
612 static struct p9_fid *p9_fid_create(struct p9_client *clnt)
618 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
619 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
621 return ERR_PTR(-ENOMEM);
623 fid->fid = p9_idpool_get(clnt->fidpool);
629 memset(&fid->qid, 0, sizeof(struct p9_qid));
632 fid->uid = current->fsuid;
636 spin_lock_irqsave(&clnt->lock, flags);
637 list_add(&fid->flist, &clnt->fidlist);
638 spin_unlock_irqrestore(&clnt->lock, flags);
647 static void p9_fid_destroy(struct p9_fid *fid)
649 struct p9_client *clnt;
652 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
654 p9_idpool_put(fid->fid, clnt->fidpool);
655 spin_lock_irqsave(&clnt->lock, flags);
656 list_del(&fid->flist);
657 spin_unlock_irqrestore(&clnt->lock, flags);
661 int p9_client_version(struct p9_client *c)
664 struct p9_req_t *req;
668 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d extended %d\n",
670 req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize,
671 c->dotu ? "9P2000.u" : "9P2000");
675 err = p9pdu_readf(req->rc, c->dotu, "ds", &msize, &version);
677 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
678 p9pdu_dump(1, req->rc);
682 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
683 if (!memcmp(version, "9P2000.u", 8))
685 else if (!memcmp(version, "9P2000", 6))
692 if (msize < c->msize)
701 EXPORT_SYMBOL(p9_client_version);
703 struct p9_client *p9_client_create(const char *dev_name, char *options)
706 struct p9_client *clnt;
709 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
711 return ERR_PTR(-ENOMEM);
713 clnt->trans_mod = NULL;
715 spin_lock_init(&clnt->lock);
716 INIT_LIST_HEAD(&clnt->fidlist);
717 clnt->fidpool = p9_idpool_create();
718 if (IS_ERR(clnt->fidpool)) {
719 err = PTR_ERR(clnt->fidpool);
720 clnt->fidpool = NULL;
726 err = parse_opts(options, clnt);
730 if (clnt->trans_mod == NULL) {
731 err = -EPROTONOSUPPORT;
732 P9_DPRINTK(P9_DEBUG_ERROR,
733 "No transport defined or default transport\n");
737 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d dotu %d\n",
738 clnt, clnt->trans_mod, clnt->msize, clnt->dotu);
740 err = clnt->trans_mod->create(clnt, dev_name, options);
744 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
745 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
747 err = p9_client_version(clnt);
754 p9_client_destroy(clnt);
757 EXPORT_SYMBOL(p9_client_create);
759 void p9_client_destroy(struct p9_client *clnt)
761 struct p9_fid *fid, *fidptr;
763 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
766 clnt->trans_mod->close(clnt);
768 v9fs_put_trans(clnt->trans_mod);
770 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist)
774 p9_idpool_destroy(clnt->fidpool);
776 p9_tag_cleanup(clnt);
780 EXPORT_SYMBOL(p9_client_destroy);
782 void p9_client_disconnect(struct p9_client *clnt)
784 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
785 clnt->status = Disconnected;
787 EXPORT_SYMBOL(p9_client_disconnect);
789 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
790 char *uname, u32 n_uname, char *aname)
793 struct p9_req_t *req;
797 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
798 afid ? afid->fid : -1, uname, aname);
801 fid = p9_fid_create(clnt);
808 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
809 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
815 err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid);
817 p9pdu_dump(1, req->rc);
818 p9_free_req(clnt, req);
822 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
823 qid.type, qid.path, qid.version);
825 memmove(&fid->qid, &qid, sizeof(struct p9_qid));
827 p9_free_req(clnt, req);
835 EXPORT_SYMBOL(p9_client_attach);
838 p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname)
841 struct p9_req_t *req;
845 P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname);
848 afid = p9_fid_create(clnt);
855 req = p9_client_rpc(clnt, P9_TAUTH, "dss?d",
856 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
862 err = p9pdu_readf(req->rc, clnt->dotu, "Q", &qid);
864 p9pdu_dump(1, req->rc);
865 p9_free_req(clnt, req);
869 P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n",
870 qid.type, qid.path, qid.version);
872 memmove(&afid->qid, &qid, sizeof(struct p9_qid));
873 p9_free_req(clnt, req);
878 p9_fid_destroy(afid);
881 EXPORT_SYMBOL(p9_client_auth);
883 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
887 struct p9_client *clnt;
889 struct p9_qid *wqids;
890 struct p9_req_t *req;
891 int16_t nwqids, count;
896 fid = p9_fid_create(clnt);
903 fid->uid = oldfid->uid;
908 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n",
909 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
911 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
918 err = p9pdu_readf(req->rc, clnt->dotu, "R", &nwqids, &wqids);
920 p9pdu_dump(1, req->rc);
921 p9_free_req(clnt, req);
924 p9_free_req(clnt, req);
926 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
928 if (nwqids != nwname) {
933 for (count = 0; count < nwqids; count++)
934 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
935 count, wqids[count].type, wqids[count].path,
936 wqids[count].version);
939 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
941 fid->qid = oldfid->qid;
946 p9_client_clunk(fid);
950 if (fid && (fid != oldfid))
955 EXPORT_SYMBOL(p9_client_walk);
957 int p9_client_open(struct p9_fid *fid, int mode)
960 struct p9_client *clnt;
961 struct p9_req_t *req;
965 P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode);
972 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
978 err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
980 p9pdu_dump(1, req->rc);
984 P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n",
985 qid.type, qid.path, qid.version, iounit);
988 fid->iounit = iounit;
991 p9_free_req(clnt, req);
995 EXPORT_SYMBOL(p9_client_open);
997 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
1001 struct p9_client *clnt;
1002 struct p9_req_t *req;
1006 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1007 fid->fid, name, perm, mode);
1011 if (fid->mode != -1)
1014 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
1021 err = p9pdu_readf(req->rc, clnt->dotu, "Qd", &qid, &iounit);
1023 p9pdu_dump(1, req->rc);
1024 goto free_and_error;
1027 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1028 qid.type, qid.path, qid.version, iounit);
1031 fid->iounit = iounit;
1034 p9_free_req(clnt, req);
1038 EXPORT_SYMBOL(p9_client_fcreate);
1040 int p9_client_clunk(struct p9_fid *fid)
1043 struct p9_client *clnt;
1044 struct p9_req_t *req;
1046 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
1050 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
1056 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
1058 p9_free_req(clnt, req);
1059 p9_fid_destroy(fid);
1064 EXPORT_SYMBOL(p9_client_clunk);
1066 int p9_client_remove(struct p9_fid *fid)
1069 struct p9_client *clnt;
1070 struct p9_req_t *req;
1072 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
1076 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
1082 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
1084 p9_free_req(clnt, req);
1085 p9_fid_destroy(fid);
1090 EXPORT_SYMBOL(p9_client_remove);
1093 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
1096 int err, rsize, total;
1097 struct p9_client *clnt;
1098 struct p9_req_t *req;
1101 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid,
1102 (long long unsigned) offset, count);
1107 rsize = fid->iounit;
1108 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1109 rsize = clnt->msize - P9_IOHDRSZ;
1114 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize);
1120 err = p9pdu_readf(req->rc, clnt->dotu, "D", &count, &dataptr);
1122 p9pdu_dump(1, req->rc);
1123 goto free_and_error;
1126 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
1129 memmove(data, dataptr, count);
1134 err = copy_to_user(udata, dataptr, count);
1137 goto free_and_error;
1141 p9_free_req(clnt, req);
1145 p9_free_req(clnt, req);
1149 EXPORT_SYMBOL(p9_client_read);
1152 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
1153 u64 offset, u32 count)
1155 int err, rsize, total;
1156 struct p9_client *clnt;
1157 struct p9_req_t *req;
1159 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
1160 fid->fid, (long long unsigned) offset, count);
1165 rsize = fid->iounit;
1166 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1167 rsize = clnt->msize - P9_IOHDRSZ;
1172 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset,
1175 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset,
1182 err = p9pdu_readf(req->rc, clnt->dotu, "d", &count);
1184 p9pdu_dump(1, req->rc);
1185 goto free_and_error;
1188 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
1190 p9_free_req(clnt, req);
1194 p9_free_req(clnt, req);
1198 EXPORT_SYMBOL(p9_client_write);
1200 struct p9_wstat *p9_client_stat(struct p9_fid *fid)
1203 struct p9_client *clnt;
1204 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
1205 struct p9_req_t *req;
1208 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
1211 return ERR_PTR(-ENOMEM);
1216 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
1222 err = p9pdu_readf(req->rc, clnt->dotu, "wS", &ignored, ret);
1225 p9pdu_dump(1, req->rc);
1226 goto free_and_error;
1229 P9_DPRINTK(P9_DEBUG_9P,
1230 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1231 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1232 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1233 "<<< uid=%d gid=%d n_muid=%d\n",
1234 ret->size, ret->type, ret->dev, ret->qid.type,
1235 ret->qid.path, ret->qid.version, ret->mode,
1236 ret->atime, ret->mtime, ret->length, ret->name,
1237 ret->uid, ret->gid, ret->muid, ret->extension,
1238 ret->n_uid, ret->n_gid, ret->n_muid);
1241 p9_free_req(clnt, req);
1245 EXPORT_SYMBOL(p9_client_stat);
1247 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
1250 struct p9_req_t *req;
1251 struct p9_client *clnt;
1253 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
1254 P9_DPRINTK(P9_DEBUG_9P,
1255 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1256 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1257 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1258 " uid=%d gid=%d n_muid=%d\n",
1259 wst->size, wst->type, wst->dev, wst->qid.type,
1260 wst->qid.path, wst->qid.version, wst->mode,
1261 wst->atime, wst->mtime, wst->length, wst->name,
1262 wst->uid, wst->gid, wst->muid, wst->extension,
1263 wst->n_uid, wst->n_gid, wst->n_muid);
1267 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, 0, wst);
1273 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
1275 p9_free_req(clnt, req);
1279 EXPORT_SYMBOL(p9_client_wstat);