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/slab.h>
33 #include <linux/sched.h>
34 #include <linux/uaccess.h>
35 #include <net/9p/9p.h>
36 #include <linux/parser.h>
37 #include <net/9p/client.h>
38 #include <net/9p/transport.h>
42 * Client Option Parsing (code inspired by NFS code)
43 * - a little lazy - parse all client options
54 static const match_table_t tokens = {
55 {Opt_msize, "msize=%u"},
56 {Opt_legacy, "noextend"},
57 {Opt_trans, "trans=%s"},
58 {Opt_version, "version=%s"},
62 inline int p9_is_proto_dotl(struct p9_client *clnt)
64 return (clnt->proto_version == p9_proto_2000L);
66 EXPORT_SYMBOL(p9_is_proto_dotl);
68 inline int p9_is_proto_dotu(struct p9_client *clnt)
70 return (clnt->proto_version == p9_proto_2000u);
72 EXPORT_SYMBOL(p9_is_proto_dotu);
74 /* Interpret mount option for protocol version */
75 static int get_protocol_version(const substring_t *name)
77 int version = -EINVAL;
79 if (!strncmp("9p2000", name->from, name->to-name->from)) {
80 version = p9_proto_legacy;
81 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n");
82 } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) {
83 version = p9_proto_2000u;
84 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n");
85 } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) {
86 version = p9_proto_2000L;
87 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n");
89 P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ",
95 static struct p9_req_t *
96 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...);
99 * parse_options - parse mount options into client structure
100 * @opts: options string passed from mount
101 * @clnt: existing v9fs client information
103 * Return 0 upon success, -ERRNO upon failure
106 static int parse_opts(char *opts, struct p9_client *clnt)
108 char *options, *tmp_options;
110 substring_t args[MAX_OPT_ARGS];
114 clnt->proto_version = p9_proto_2000u;
120 tmp_options = kstrdup(opts, GFP_KERNEL);
122 P9_DPRINTK(P9_DEBUG_ERROR,
123 "failed to allocate copy of option string\n");
126 options = tmp_options;
128 while ((p = strsep(&options, ",")) != NULL) {
132 token = match_token(p, tokens, args);
133 if (token < Opt_trans) {
134 int r = match_int(&args[0], &option);
136 P9_DPRINTK(P9_DEBUG_ERROR,
137 "integer field, but no integer?\n");
144 clnt->msize = option;
147 clnt->trans_mod = v9fs_get_trans_by_name(&args[0]);
148 if(clnt->trans_mod == NULL) {
149 P9_DPRINTK(P9_DEBUG_ERROR,
150 "Could not find request transport: %s\n",
153 goto free_and_return;
157 clnt->proto_version = p9_proto_legacy;
160 ret = get_protocol_version(&args[0]);
162 goto free_and_return;
163 clnt->proto_version = ret;
176 * p9_tag_alloc - lookup/allocate a request by tag
177 * @c: client session to lookup tag within
178 * @tag: numeric id for transaction
180 * this is a simple array lookup, but will grow the
181 * request_slots as necessary to accomodate transaction
182 * ids which did not previously have a slot.
184 * this code relies on the client spinlock to manage locks, its
185 * possible we should switch to something else, but I'd rather
186 * stick with something low-overhead for the common case.
190 static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag)
194 struct p9_req_t *req;
196 /* This looks up the original request by tag so we know which
197 * buffer to read the data into */
200 if (tag >= c->max_tag) {
201 spin_lock_irqsave(&c->lock, flags);
202 /* check again since original check was outside of lock */
203 while (tag >= c->max_tag) {
204 row = (tag / P9_ROW_MAXTAG);
205 c->reqs[row] = kcalloc(P9_ROW_MAXTAG,
206 sizeof(struct p9_req_t), GFP_ATOMIC);
209 printk(KERN_ERR "Couldn't grow tag array\n");
210 spin_unlock_irqrestore(&c->lock, flags);
211 return ERR_PTR(-ENOMEM);
213 for (col = 0; col < P9_ROW_MAXTAG; col++) {
214 c->reqs[row][col].status = REQ_STATUS_IDLE;
215 c->reqs[row][col].tc = NULL;
217 c->max_tag += P9_ROW_MAXTAG;
219 spin_unlock_irqrestore(&c->lock, flags);
221 row = tag / P9_ROW_MAXTAG;
222 col = tag % P9_ROW_MAXTAG;
224 req = &c->reqs[row][col];
226 req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
228 printk(KERN_ERR "Couldn't grow tag array\n");
229 return ERR_PTR(-ENOMEM);
231 init_waitqueue_head(req->wq);
232 req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize,
234 req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize,
236 if ((!req->tc) || (!req->rc)) {
237 printk(KERN_ERR "Couldn't grow tag array\n");
241 req->tc = req->rc = NULL;
243 return ERR_PTR(-ENOMEM);
245 req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
246 req->tc->capacity = c->msize;
247 req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
248 req->rc->capacity = c->msize;
251 p9pdu_reset(req->tc);
252 p9pdu_reset(req->rc);
254 req->tc->tag = tag-1;
255 req->status = REQ_STATUS_ALLOC;
257 return &c->reqs[row][col];
261 * p9_tag_lookup - lookup a request by tag
262 * @c: client session to lookup tag within
263 * @tag: numeric id for transaction
267 struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
271 /* This looks up the original request by tag so we know which
272 * buffer to read the data into */
275 BUG_ON(tag >= c->max_tag);
277 row = tag / P9_ROW_MAXTAG;
278 col = tag % P9_ROW_MAXTAG;
280 return &c->reqs[row][col];
282 EXPORT_SYMBOL(p9_tag_lookup);
285 * p9_tag_init - setup tags structure and contents
286 * @c: v9fs client struct
288 * This initializes the tags structure for each client instance.
292 static int p9_tag_init(struct p9_client *c)
296 c->tagpool = p9_idpool_create();
297 if (IS_ERR(c->tagpool)) {
298 err = PTR_ERR(c->tagpool);
303 p9_idpool_get(c->tagpool); /* reserve tag 0 */
311 * p9_tag_cleanup - cleans up tags structure and reclaims resources
312 * @c: v9fs client struct
314 * This frees resources associated with the tags structure
317 static void p9_tag_cleanup(struct p9_client *c)
321 /* check to insure all requests are idle */
322 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
323 for (col = 0; col < P9_ROW_MAXTAG; col++) {
324 if (c->reqs[row][col].status != REQ_STATUS_IDLE) {
325 P9_DPRINTK(P9_DEBUG_MUX,
326 "Attempting to cleanup non-free tag %d,%d\n",
328 /* TODO: delay execution of cleanup */
335 p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */
336 p9_idpool_destroy(c->tagpool);
339 /* free requests associated with tags */
340 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
341 for (col = 0; col < P9_ROW_MAXTAG; col++) {
342 kfree(c->reqs[row][col].wq);
343 kfree(c->reqs[row][col].tc);
344 kfree(c->reqs[row][col].rc);
352 * p9_free_req - free a request and clean-up as necessary
354 * r: request to release
358 static void p9_free_req(struct p9_client *c, struct p9_req_t *r)
360 int tag = r->tc->tag;
361 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag);
363 r->status = REQ_STATUS_IDLE;
364 if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool))
365 p9_idpool_put(tag, c->tagpool);
369 * p9_client_cb - call back from transport to client
371 * req: request received
374 void p9_client_cb(struct p9_client *c, struct p9_req_t *req)
376 P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag);
378 P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
380 EXPORT_SYMBOL(p9_client_cb);
383 * p9_parse_header - parse header arguments out of a packet
384 * @pdu: packet to parse
385 * @size: size of packet
386 * @type: type of request
387 * @tag: tag of packet
388 * @rewind: set if we need to rewind offset afterwards
392 p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag,
398 int offset = pdu->offset;
405 err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag);
407 goto rewind_and_exit;
413 P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size,
426 pdu->offset = offset;
429 EXPORT_SYMBOL(p9_parse_header);
432 * p9_check_errors - check 9p packet for error return and process it
433 * @c: current client instance
434 * @req: request to parse and check for error conditions
436 * returns error code if one is discovered, otherwise returns 0
438 * this will have to be more complicated if we have multiple
442 static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
447 err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
449 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
453 if (type == P9_RERROR) {
457 err = p9pdu_readf(req->rc, c->proto_version, "s?d",
460 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
465 if (p9_is_proto_dotu(c) ||
469 if (!err || !IS_ERR_VALUE(err))
470 err = p9_errstr2errno(ename, strlen(ename));
472 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
482 * p9_client_flush - flush (cancel) a request
484 * @oldreq: request to cancel
486 * This sents a flush for a particular requests and links
487 * the flush request to the original request. The current
488 * code only supports a single flush request although the protocol
489 * allows for multiple flush requests to be sent for a single request.
493 static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
495 struct p9_req_t *req;
499 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
503 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
505 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
510 /* if we haven't received a response for oldreq,
511 remove it from the list. */
513 if (oldreq->status == REQ_STATUS_FLSH)
514 list_del(&oldreq->req_list);
515 spin_unlock(&c->lock);
522 * p9_client_rpc - issue a request and wait for a response
524 * @type: type of request
525 * @fmt: protocol format string (see protocol.c)
527 * Returns request structure (which client must free using p9_free_req)
530 static struct p9_req_t *
531 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
535 struct p9_req_t *req;
539 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
541 /* we allow for any status other than disconnected */
542 if (c->status == Disconnected)
543 return ERR_PTR(-EIO);
545 /* if status is begin_disconnected we allow only clunk request */
546 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK))
547 return ERR_PTR(-EIO);
549 if (signal_pending(current)) {
551 clear_thread_flag(TIF_SIGPENDING);
556 if (type != P9_TVERSION) {
557 tag = p9_idpool_get(c->tagpool);
559 return ERR_PTR(-ENOMEM);
562 req = p9_tag_alloc(c, tag);
566 /* marshall the data */
567 p9pdu_prepare(req->tc, tag, type);
569 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
571 p9pdu_finalize(req->tc);
573 err = c->trans_mod->request(c, req);
575 c->status = Disconnected;
579 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag);
580 err = wait_event_interruptible(*req->wq,
581 req->status >= REQ_STATUS_RCVD);
582 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n",
585 if (req->status == REQ_STATUS_ERROR) {
586 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
590 if ((err == -ERESTARTSYS) && (c->status == Connected)) {
591 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
593 clear_thread_flag(TIF_SIGPENDING);
595 if (c->trans_mod->cancel(c, req))
596 p9_client_flush(c, req);
598 /* if we received the response anyway, don't signal error */
599 if (req->status == REQ_STATUS_RCVD)
604 spin_lock_irqsave(¤t->sighand->siglock, flags);
606 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
612 err = p9_check_errors(c, req);
614 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
619 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
625 static struct p9_fid *p9_fid_create(struct p9_client *clnt)
631 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
632 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
634 return ERR_PTR(-ENOMEM);
636 ret = p9_idpool_get(clnt->fidpool);
643 memset(&fid->qid, 0, sizeof(struct p9_qid));
645 fid->uid = current_fsuid();
648 spin_lock_irqsave(&clnt->lock, flags);
649 list_add(&fid->flist, &clnt->fidlist);
650 spin_unlock_irqrestore(&clnt->lock, flags);
659 static void p9_fid_destroy(struct p9_fid *fid)
661 struct p9_client *clnt;
664 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
666 p9_idpool_put(fid->fid, clnt->fidpool);
667 spin_lock_irqsave(&clnt->lock, flags);
668 list_del(&fid->flist);
669 spin_unlock_irqrestore(&clnt->lock, flags);
674 int p9_client_version(struct p9_client *c)
677 struct p9_req_t *req;
681 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",
682 c->msize, c->proto_version);
684 switch (c->proto_version) {
686 req = p9_client_rpc(c, P9_TVERSION, "ds",
687 c->msize, "9P2000.L");
690 req = p9_client_rpc(c, P9_TVERSION, "ds",
691 c->msize, "9P2000.u");
693 case p9_proto_legacy:
694 req = p9_client_rpc(c, P9_TVERSION, "ds",
705 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
707 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
708 p9pdu_dump(1, req->rc);
712 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
713 if (!strncmp(version, "9P2000.L", 8))
714 c->proto_version = p9_proto_2000L;
715 else if (!strncmp(version, "9P2000.u", 8))
716 c->proto_version = p9_proto_2000u;
717 else if (!strncmp(version, "9P2000", 6))
718 c->proto_version = p9_proto_legacy;
724 if (msize < c->msize)
733 EXPORT_SYMBOL(p9_client_version);
735 struct p9_client *p9_client_create(const char *dev_name, char *options)
738 struct p9_client *clnt;
741 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
743 return ERR_PTR(-ENOMEM);
745 clnt->trans_mod = NULL;
747 spin_lock_init(&clnt->lock);
748 INIT_LIST_HEAD(&clnt->fidlist);
752 err = parse_opts(options, clnt);
756 if (!clnt->trans_mod)
757 clnt->trans_mod = v9fs_get_default_trans();
759 if (clnt->trans_mod == NULL) {
760 err = -EPROTONOSUPPORT;
761 P9_DPRINTK(P9_DEBUG_ERROR,
762 "No transport defined or default transport\n");
766 clnt->fidpool = p9_idpool_create();
767 if (IS_ERR(clnt->fidpool)) {
768 err = PTR_ERR(clnt->fidpool);
769 clnt->fidpool = NULL;
773 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
774 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
776 err = clnt->trans_mod->create(clnt, dev_name, options);
778 goto destroy_fidpool;
780 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
781 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
783 err = p9_client_version(clnt);
790 clnt->trans_mod->close(clnt);
792 p9_idpool_destroy(clnt->fidpool);
794 v9fs_put_trans(clnt->trans_mod);
799 EXPORT_SYMBOL(p9_client_create);
801 void p9_client_destroy(struct p9_client *clnt)
803 struct p9_fid *fid, *fidptr;
805 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
808 clnt->trans_mod->close(clnt);
810 v9fs_put_trans(clnt->trans_mod);
812 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) {
813 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid);
818 p9_idpool_destroy(clnt->fidpool);
820 p9_tag_cleanup(clnt);
824 EXPORT_SYMBOL(p9_client_destroy);
826 void p9_client_disconnect(struct p9_client *clnt)
828 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
829 clnt->status = Disconnected;
831 EXPORT_SYMBOL(p9_client_disconnect);
833 void p9_client_begin_disconnect(struct p9_client *clnt)
835 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
836 clnt->status = BeginDisconnect;
838 EXPORT_SYMBOL(p9_client_begin_disconnect);
840 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
841 char *uname, u32 n_uname, char *aname)
844 struct p9_req_t *req;
848 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
849 afid ? afid->fid : -1, uname, aname);
852 fid = p9_fid_create(clnt);
859 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
860 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
866 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
868 p9pdu_dump(1, req->rc);
869 p9_free_req(clnt, req);
873 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
875 (unsigned long long)qid.path,
878 memmove(&fid->qid, &qid, sizeof(struct p9_qid));
880 p9_free_req(clnt, req);
888 EXPORT_SYMBOL(p9_client_attach);
891 p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname)
894 struct p9_req_t *req;
898 P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname);
901 afid = p9_fid_create(clnt);
908 req = p9_client_rpc(clnt, P9_TAUTH, "dss?d",
909 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
915 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
917 p9pdu_dump(1, req->rc);
918 p9_free_req(clnt, req);
922 P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n",
924 (unsigned long long)qid.path,
927 memmove(&afid->qid, &qid, sizeof(struct p9_qid));
928 p9_free_req(clnt, req);
933 p9_fid_destroy(afid);
936 EXPORT_SYMBOL(p9_client_auth);
938 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
942 struct p9_client *clnt;
944 struct p9_qid *wqids;
945 struct p9_req_t *req;
946 int16_t nwqids, count;
952 fid = p9_fid_create(clnt);
959 fid->uid = oldfid->uid;
964 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n",
965 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
967 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
974 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
976 p9pdu_dump(1, req->rc);
977 p9_free_req(clnt, req);
980 p9_free_req(clnt, req);
982 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
984 if (nwqids != nwname) {
989 for (count = 0; count < nwqids; count++)
990 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
991 count, wqids[count].type,
992 (unsigned long long)wqids[count].path,
993 wqids[count].version);
996 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
998 fid->qid = oldfid->qid;
1005 p9_client_clunk(fid);
1009 if (fid && (fid != oldfid))
1010 p9_fid_destroy(fid);
1012 return ERR_PTR(err);
1014 EXPORT_SYMBOL(p9_client_walk);
1016 int p9_client_open(struct p9_fid *fid, int mode)
1019 struct p9_client *clnt;
1020 struct p9_req_t *req;
1025 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
1026 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
1029 if (fid->mode != -1)
1032 if (p9_is_proto_dotl(clnt))
1033 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
1035 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
1041 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1043 p9pdu_dump(1, req->rc);
1044 goto free_and_error;
1047 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
1048 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type,
1049 (unsigned long long)qid.path, qid.version, iounit);
1052 fid->iounit = iounit;
1055 p9_free_req(clnt, req);
1059 EXPORT_SYMBOL(p9_client_open);
1061 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
1062 gid_t gid, struct p9_qid *qid)
1065 struct p9_client *clnt;
1066 struct p9_req_t *req;
1069 P9_DPRINTK(P9_DEBUG_9P,
1070 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n",
1071 ofid->fid, name, flags, mode, gid);
1074 if (ofid->mode != -1)
1077 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags,
1084 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
1086 p9pdu_dump(1, req->rc);
1087 goto free_and_error;
1090 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n",
1092 (unsigned long long)qid->path,
1093 qid->version, iounit);
1096 ofid->iounit = iounit;
1099 p9_free_req(clnt, req);
1103 EXPORT_SYMBOL(p9_client_create_dotl);
1105 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
1109 struct p9_client *clnt;
1110 struct p9_req_t *req;
1114 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1115 fid->fid, name, perm, mode);
1119 if (fid->mode != -1)
1122 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
1129 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1131 p9pdu_dump(1, req->rc);
1132 goto free_and_error;
1135 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1137 (unsigned long long)qid.path,
1138 qid.version, iounit);
1141 fid->iounit = iounit;
1144 p9_free_req(clnt, req);
1148 EXPORT_SYMBOL(p9_client_fcreate);
1150 int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,
1154 struct p9_client *clnt;
1155 struct p9_req_t *req;
1157 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n",
1158 dfid->fid, name, symtgt);
1161 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt,
1168 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1170 p9pdu_dump(1, req->rc);
1171 goto free_and_error;
1174 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n",
1175 qid->type, (unsigned long long)qid->path, qid->version);
1178 p9_free_req(clnt, req);
1182 EXPORT_SYMBOL(p9_client_symlink);
1184 int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
1186 struct p9_client *clnt;
1187 struct p9_req_t *req;
1189 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
1190 dfid->fid, oldfid->fid, newname);
1192 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
1195 return PTR_ERR(req);
1197 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
1198 p9_free_req(clnt, req);
1201 EXPORT_SYMBOL(p9_client_link);
1203 int p9_client_clunk(struct p9_fid *fid)
1206 struct p9_client *clnt;
1207 struct p9_req_t *req;
1209 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
1213 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
1219 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
1221 p9_free_req(clnt, req);
1222 p9_fid_destroy(fid);
1227 EXPORT_SYMBOL(p9_client_clunk);
1229 int p9_client_remove(struct p9_fid *fid)
1232 struct p9_client *clnt;
1233 struct p9_req_t *req;
1235 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
1239 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
1245 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
1247 p9_free_req(clnt, req);
1249 p9_fid_destroy(fid);
1252 EXPORT_SYMBOL(p9_client_remove);
1255 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
1258 int err, rsize, total;
1259 struct p9_client *clnt;
1260 struct p9_req_t *req;
1263 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid,
1264 (long long unsigned) offset, count);
1269 rsize = fid->iounit;
1270 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1271 rsize = clnt->msize - P9_IOHDRSZ;
1276 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize);
1282 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1284 p9pdu_dump(1, req->rc);
1285 goto free_and_error;
1288 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
1291 memmove(data, dataptr, count);
1295 err = copy_to_user(udata, dataptr, count);
1298 goto free_and_error;
1302 p9_free_req(clnt, req);
1306 p9_free_req(clnt, req);
1310 EXPORT_SYMBOL(p9_client_read);
1313 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
1314 u64 offset, u32 count)
1316 int err, rsize, total;
1317 struct p9_client *clnt;
1318 struct p9_req_t *req;
1320 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
1321 fid->fid, (long long unsigned) offset, count);
1326 rsize = fid->iounit;
1327 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1328 rsize = clnt->msize - P9_IOHDRSZ;
1333 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset,
1336 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset,
1343 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
1345 p9pdu_dump(1, req->rc);
1346 goto free_and_error;
1349 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
1351 p9_free_req(clnt, req);
1355 p9_free_req(clnt, req);
1359 EXPORT_SYMBOL(p9_client_write);
1361 struct p9_wstat *p9_client_stat(struct p9_fid *fid)
1364 struct p9_client *clnt;
1365 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
1366 struct p9_req_t *req;
1369 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
1372 return ERR_PTR(-ENOMEM);
1377 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
1383 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
1385 p9pdu_dump(1, req->rc);
1386 p9_free_req(clnt, req);
1390 P9_DPRINTK(P9_DEBUG_9P,
1391 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1392 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1393 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1394 "<<< uid=%d gid=%d n_muid=%d\n",
1395 ret->size, ret->type, ret->dev, ret->qid.type,
1396 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode,
1397 ret->atime, ret->mtime, (unsigned long long)ret->length,
1398 ret->name, ret->uid, ret->gid, ret->muid, ret->extension,
1399 ret->n_uid, ret->n_gid, ret->n_muid);
1401 p9_free_req(clnt, req);
1406 return ERR_PTR(err);
1408 EXPORT_SYMBOL(p9_client_stat);
1410 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
1414 struct p9_client *clnt;
1415 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl),
1417 struct p9_req_t *req;
1419 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n",
1420 fid->fid, request_mask);
1423 return ERR_PTR(-ENOMEM);
1428 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask);
1434 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
1436 p9pdu_dump(1, req->rc);
1437 p9_free_req(clnt, req);
1441 P9_DPRINTK(P9_DEBUG_9P,
1442 "<<< RGETATTR st_result_mask=%lld\n"
1443 "<<< qid=%x.%llx.%x\n"
1444 "<<< st_mode=%8.8x st_nlink=%llu\n"
1445 "<<< st_uid=%d st_gid=%d\n"
1446 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n"
1447 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n"
1448 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n"
1449 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n"
1450 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n"
1451 "<<< st_gen=%lld st_data_version=%lld",
1452 ret->st_result_mask, ret->qid.type, ret->qid.path,
1453 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid,
1454 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize,
1455 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec,
1456 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec,
1457 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec,
1458 ret->st_gen, ret->st_data_version);
1460 p9_free_req(clnt, req);
1465 return ERR_PTR(err);
1467 EXPORT_SYMBOL(p9_client_getattr_dotl);
1469 static int p9_client_statsize(struct p9_wstat *wst, int proto_version)
1473 /* NOTE: size shouldn't include its own length */
1474 /* size[2] type[2] dev[4] qid[13] */
1475 /* mode[4] atime[4] mtime[4] length[8]*/
1476 /* name[s] uid[s] gid[s] muid[s] */
1477 ret = 2+4+13+4+4+4+8+2+2+2+2;
1480 ret += strlen(wst->name);
1482 ret += strlen(wst->uid);
1484 ret += strlen(wst->gid);
1486 ret += strlen(wst->muid);
1488 if ((proto_version == p9_proto_2000u) ||
1489 (proto_version == p9_proto_2000L)) {
1490 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
1492 ret += strlen(wst->extension);
1498 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
1501 struct p9_req_t *req;
1502 struct p9_client *clnt;
1506 wst->size = p9_client_statsize(wst, clnt->proto_version);
1507 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
1508 P9_DPRINTK(P9_DEBUG_9P,
1509 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1510 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1511 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1512 " uid=%d gid=%d n_muid=%d\n",
1513 wst->size, wst->type, wst->dev, wst->qid.type,
1514 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode,
1515 wst->atime, wst->mtime, (unsigned long long)wst->length,
1516 wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
1517 wst->n_uid, wst->n_gid, wst->n_muid);
1519 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst);
1525 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
1527 p9_free_req(clnt, req);
1531 EXPORT_SYMBOL(p9_client_wstat);
1533 int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr)
1536 struct p9_req_t *req;
1537 struct p9_client *clnt;
1541 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid);
1542 P9_DPRINTK(P9_DEBUG_9P,
1543 " valid=%x mode=%x uid=%d gid=%d size=%lld\n"
1544 " atime_sec=%lld atime_nsec=%lld\n"
1545 " mtime_sec=%lld mtime_nsec=%lld\n",
1546 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid,
1547 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec,
1548 p9attr->mtime_sec, p9attr->mtime_nsec);
1550 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr);
1556 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid);
1557 p9_free_req(clnt, req);
1561 EXPORT_SYMBOL(p9_client_setattr);
1563 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
1566 struct p9_req_t *req;
1567 struct p9_client *clnt;
1572 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid);
1574 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid);
1580 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,
1581 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
1582 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
1584 p9pdu_dump(1, req->rc);
1585 p9_free_req(clnt, req);
1589 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
1590 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
1591 "fsid %llu namelen %ld\n",
1592 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize,
1593 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree,
1594 sb->fsid, (long int)sb->namelen);
1596 p9_free_req(clnt, req);
1600 EXPORT_SYMBOL(p9_client_statfs);
1602 int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)
1605 struct p9_req_t *req;
1606 struct p9_client *clnt;
1611 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n",
1612 fid->fid, newdirfid->fid, name);
1614 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid,
1615 newdirfid->fid, name);
1621 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid);
1623 p9_free_req(clnt, req);
1627 EXPORT_SYMBOL(p9_client_rename);
1630 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
1632 struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
1633 const char *attr_name, u64 *attr_size)
1636 struct p9_req_t *req;
1637 struct p9_client *clnt;
1638 struct p9_fid *attr_fid;
1641 clnt = file_fid->clnt;
1642 attr_fid = p9_fid_create(clnt);
1643 if (IS_ERR(attr_fid)) {
1644 err = PTR_ERR(attr_fid);
1648 P9_DPRINTK(P9_DEBUG_9P,
1649 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
1650 file_fid->fid, attr_fid->fid, attr_name);
1652 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",
1653 file_fid->fid, attr_fid->fid, attr_name);
1658 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
1660 p9pdu_dump(1, req->rc);
1661 p9_free_req(clnt, req);
1664 p9_free_req(clnt, req);
1665 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n",
1666 attr_fid->fid, *attr_size);
1669 p9_client_clunk(attr_fid);
1672 if (attr_fid && (attr_fid != file_fid))
1673 p9_fid_destroy(attr_fid);
1675 return ERR_PTR(err);
1677 EXPORT_SYMBOL_GPL(p9_client_xattrwalk);
1679 int p9_client_xattrcreate(struct p9_fid *fid, const char *name,
1680 u64 attr_size, int flags)
1683 struct p9_req_t *req;
1684 struct p9_client *clnt;
1686 P9_DPRINTK(P9_DEBUG_9P,
1687 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n",
1688 fid->fid, name, (long long)attr_size, flags);
1691 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd",
1692 fid->fid, name, attr_size, flags);
1697 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid);
1698 p9_free_req(clnt, req);
1702 EXPORT_SYMBOL_GPL(p9_client_xattrcreate);
1704 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
1706 int err, rsize, total;
1707 struct p9_client *clnt;
1708 struct p9_req_t *req;
1711 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n",
1712 fid->fid, (long long unsigned) offset, count);
1718 rsize = fid->iounit;
1719 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ)
1720 rsize = clnt->msize - P9_READDIRHDRSZ;
1725 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize);
1731 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1733 p9pdu_dump(1, req->rc);
1734 goto free_and_error;
1737 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count);
1740 memmove(data, dataptr, count);
1742 p9_free_req(clnt, req);
1746 p9_free_req(clnt, req);
1750 EXPORT_SYMBOL(p9_client_readdir);
1752 int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,
1753 dev_t rdev, gid_t gid, struct p9_qid *qid)
1756 struct p9_client *clnt;
1757 struct p9_req_t *req;
1761 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d "
1762 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev));
1763 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode,
1764 MAJOR(rdev), MINOR(rdev), gid);
1766 return PTR_ERR(req);
1768 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1770 p9pdu_dump(1, req->rc);
1773 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
1774 (unsigned long long)qid->path, qid->version);
1777 p9_free_req(clnt, req);
1781 EXPORT_SYMBOL(p9_client_mknod_dotl);
1783 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
1784 gid_t gid, struct p9_qid *qid)
1787 struct p9_client *clnt;
1788 struct p9_req_t *req;
1792 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n",
1793 fid->fid, name, mode, gid);
1794 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode,
1797 return PTR_ERR(req);
1799 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1801 p9pdu_dump(1, req->rc);
1804 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
1805 (unsigned long long)qid->path, qid->version);
1808 p9_free_req(clnt, req);
1812 EXPORT_SYMBOL(p9_client_mkdir_dotl);