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 static 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)
734 struct p9_client *p9_client_create(const char *dev_name, char *options)
737 struct p9_client *clnt;
740 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
742 return ERR_PTR(-ENOMEM);
744 clnt->trans_mod = NULL;
746 spin_lock_init(&clnt->lock);
747 INIT_LIST_HEAD(&clnt->fidlist);
751 err = parse_opts(options, clnt);
755 if (!clnt->trans_mod)
756 clnt->trans_mod = v9fs_get_default_trans();
758 if (clnt->trans_mod == NULL) {
759 err = -EPROTONOSUPPORT;
760 P9_DPRINTK(P9_DEBUG_ERROR,
761 "No transport defined or default transport\n");
765 clnt->fidpool = p9_idpool_create();
766 if (IS_ERR(clnt->fidpool)) {
767 err = PTR_ERR(clnt->fidpool);
768 clnt->fidpool = NULL;
772 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
773 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
775 err = clnt->trans_mod->create(clnt, dev_name, options);
777 goto destroy_fidpool;
779 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
780 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
782 err = p9_client_version(clnt);
789 clnt->trans_mod->close(clnt);
791 p9_idpool_destroy(clnt->fidpool);
793 v9fs_put_trans(clnt->trans_mod);
798 EXPORT_SYMBOL(p9_client_create);
800 void p9_client_destroy(struct p9_client *clnt)
802 struct p9_fid *fid, *fidptr;
804 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
807 clnt->trans_mod->close(clnt);
809 v9fs_put_trans(clnt->trans_mod);
811 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) {
812 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid);
817 p9_idpool_destroy(clnt->fidpool);
819 p9_tag_cleanup(clnt);
823 EXPORT_SYMBOL(p9_client_destroy);
825 void p9_client_disconnect(struct p9_client *clnt)
827 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
828 clnt->status = Disconnected;
830 EXPORT_SYMBOL(p9_client_disconnect);
832 void p9_client_begin_disconnect(struct p9_client *clnt)
834 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
835 clnt->status = BeginDisconnect;
837 EXPORT_SYMBOL(p9_client_begin_disconnect);
839 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
840 char *uname, u32 n_uname, char *aname)
843 struct p9_req_t *req;
847 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
848 afid ? afid->fid : -1, uname, aname);
851 fid = p9_fid_create(clnt);
858 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
859 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
865 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
867 p9pdu_dump(1, req->rc);
868 p9_free_req(clnt, req);
872 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
874 (unsigned long long)qid.path,
877 memmove(&fid->qid, &qid, sizeof(struct p9_qid));
879 p9_free_req(clnt, req);
887 EXPORT_SYMBOL(p9_client_attach);
889 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
893 struct p9_client *clnt;
895 struct p9_qid *wqids;
896 struct p9_req_t *req;
897 int16_t nwqids, count;
903 fid = p9_fid_create(clnt);
910 fid->uid = oldfid->uid;
915 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n",
916 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
918 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
925 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
927 p9pdu_dump(1, req->rc);
928 p9_free_req(clnt, req);
931 p9_free_req(clnt, req);
933 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
935 if (nwqids != nwname) {
940 for (count = 0; count < nwqids; count++)
941 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
942 count, wqids[count].type,
943 (unsigned long long)wqids[count].path,
944 wqids[count].version);
947 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
949 fid->qid = oldfid->qid;
956 p9_client_clunk(fid);
960 if (fid && (fid != oldfid))
965 EXPORT_SYMBOL(p9_client_walk);
967 int p9_client_open(struct p9_fid *fid, int mode)
970 struct p9_client *clnt;
971 struct p9_req_t *req;
976 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
977 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
983 if (p9_is_proto_dotl(clnt))
984 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
986 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
992 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
994 p9pdu_dump(1, req->rc);
998 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
999 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type,
1000 (unsigned long long)qid.path, qid.version, iounit);
1003 fid->iounit = iounit;
1006 p9_free_req(clnt, req);
1010 EXPORT_SYMBOL(p9_client_open);
1012 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
1013 gid_t gid, struct p9_qid *qid)
1016 struct p9_client *clnt;
1017 struct p9_req_t *req;
1020 P9_DPRINTK(P9_DEBUG_9P,
1021 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n",
1022 ofid->fid, name, flags, mode, gid);
1025 if (ofid->mode != -1)
1028 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags,
1035 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
1037 p9pdu_dump(1, req->rc);
1038 goto free_and_error;
1041 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n",
1043 (unsigned long long)qid->path,
1044 qid->version, iounit);
1047 ofid->iounit = iounit;
1050 p9_free_req(clnt, req);
1054 EXPORT_SYMBOL(p9_client_create_dotl);
1056 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
1060 struct p9_client *clnt;
1061 struct p9_req_t *req;
1065 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1066 fid->fid, name, perm, mode);
1070 if (fid->mode != -1)
1073 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
1080 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1082 p9pdu_dump(1, req->rc);
1083 goto free_and_error;
1086 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1088 (unsigned long long)qid.path,
1089 qid.version, iounit);
1092 fid->iounit = iounit;
1095 p9_free_req(clnt, req);
1099 EXPORT_SYMBOL(p9_client_fcreate);
1101 int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,
1105 struct p9_client *clnt;
1106 struct p9_req_t *req;
1108 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n",
1109 dfid->fid, name, symtgt);
1112 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt,
1119 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1121 p9pdu_dump(1, req->rc);
1122 goto free_and_error;
1125 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n",
1126 qid->type, (unsigned long long)qid->path, qid->version);
1129 p9_free_req(clnt, req);
1133 EXPORT_SYMBOL(p9_client_symlink);
1135 int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
1137 struct p9_client *clnt;
1138 struct p9_req_t *req;
1140 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
1141 dfid->fid, oldfid->fid, newname);
1143 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
1146 return PTR_ERR(req);
1148 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
1149 p9_free_req(clnt, req);
1152 EXPORT_SYMBOL(p9_client_link);
1154 int p9_client_clunk(struct p9_fid *fid)
1157 struct p9_client *clnt;
1158 struct p9_req_t *req;
1160 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
1164 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
1170 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
1172 p9_free_req(clnt, req);
1173 p9_fid_destroy(fid);
1178 EXPORT_SYMBOL(p9_client_clunk);
1180 int p9_client_remove(struct p9_fid *fid)
1183 struct p9_client *clnt;
1184 struct p9_req_t *req;
1186 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
1190 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
1196 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
1198 p9_free_req(clnt, req);
1200 p9_fid_destroy(fid);
1203 EXPORT_SYMBOL(p9_client_remove);
1206 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
1209 int err, rsize, total;
1210 struct p9_client *clnt;
1211 struct p9_req_t *req;
1214 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid,
1215 (long long unsigned) offset, count);
1220 rsize = fid->iounit;
1221 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1222 rsize = clnt->msize - P9_IOHDRSZ;
1227 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize);
1233 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1235 p9pdu_dump(1, req->rc);
1236 goto free_and_error;
1239 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
1242 memmove(data, dataptr, count);
1246 err = copy_to_user(udata, dataptr, count);
1249 goto free_and_error;
1253 p9_free_req(clnt, req);
1257 p9_free_req(clnt, req);
1261 EXPORT_SYMBOL(p9_client_read);
1264 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
1265 u64 offset, u32 count)
1267 int err, rsize, total;
1268 struct p9_client *clnt;
1269 struct p9_req_t *req;
1271 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
1272 fid->fid, (long long unsigned) offset, count);
1277 rsize = fid->iounit;
1278 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1279 rsize = clnt->msize - P9_IOHDRSZ;
1284 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset,
1287 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset,
1294 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
1296 p9pdu_dump(1, req->rc);
1297 goto free_and_error;
1300 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
1302 p9_free_req(clnt, req);
1306 p9_free_req(clnt, req);
1310 EXPORT_SYMBOL(p9_client_write);
1312 struct p9_wstat *p9_client_stat(struct p9_fid *fid)
1315 struct p9_client *clnt;
1316 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
1317 struct p9_req_t *req;
1320 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
1323 return ERR_PTR(-ENOMEM);
1328 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
1334 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
1336 p9pdu_dump(1, req->rc);
1337 p9_free_req(clnt, req);
1341 P9_DPRINTK(P9_DEBUG_9P,
1342 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1343 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1344 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1345 "<<< uid=%d gid=%d n_muid=%d\n",
1346 ret->size, ret->type, ret->dev, ret->qid.type,
1347 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode,
1348 ret->atime, ret->mtime, (unsigned long long)ret->length,
1349 ret->name, ret->uid, ret->gid, ret->muid, ret->extension,
1350 ret->n_uid, ret->n_gid, ret->n_muid);
1352 p9_free_req(clnt, req);
1357 return ERR_PTR(err);
1359 EXPORT_SYMBOL(p9_client_stat);
1361 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
1365 struct p9_client *clnt;
1366 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl),
1368 struct p9_req_t *req;
1370 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n",
1371 fid->fid, request_mask);
1374 return ERR_PTR(-ENOMEM);
1379 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask);
1385 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
1387 p9pdu_dump(1, req->rc);
1388 p9_free_req(clnt, req);
1392 P9_DPRINTK(P9_DEBUG_9P,
1393 "<<< RGETATTR st_result_mask=%lld\n"
1394 "<<< qid=%x.%llx.%x\n"
1395 "<<< st_mode=%8.8x st_nlink=%llu\n"
1396 "<<< st_uid=%d st_gid=%d\n"
1397 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n"
1398 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n"
1399 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n"
1400 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n"
1401 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n"
1402 "<<< st_gen=%lld st_data_version=%lld",
1403 ret->st_result_mask, ret->qid.type, ret->qid.path,
1404 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid,
1405 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize,
1406 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec,
1407 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec,
1408 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec,
1409 ret->st_gen, ret->st_data_version);
1411 p9_free_req(clnt, req);
1416 return ERR_PTR(err);
1418 EXPORT_SYMBOL(p9_client_getattr_dotl);
1420 static int p9_client_statsize(struct p9_wstat *wst, int proto_version)
1424 /* NOTE: size shouldn't include its own length */
1425 /* size[2] type[2] dev[4] qid[13] */
1426 /* mode[4] atime[4] mtime[4] length[8]*/
1427 /* name[s] uid[s] gid[s] muid[s] */
1428 ret = 2+4+13+4+4+4+8+2+2+2+2;
1431 ret += strlen(wst->name);
1433 ret += strlen(wst->uid);
1435 ret += strlen(wst->gid);
1437 ret += strlen(wst->muid);
1439 if ((proto_version == p9_proto_2000u) ||
1440 (proto_version == p9_proto_2000L)) {
1441 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
1443 ret += strlen(wst->extension);
1449 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
1452 struct p9_req_t *req;
1453 struct p9_client *clnt;
1457 wst->size = p9_client_statsize(wst, clnt->proto_version);
1458 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
1459 P9_DPRINTK(P9_DEBUG_9P,
1460 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1461 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1462 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1463 " uid=%d gid=%d n_muid=%d\n",
1464 wst->size, wst->type, wst->dev, wst->qid.type,
1465 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode,
1466 wst->atime, wst->mtime, (unsigned long long)wst->length,
1467 wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
1468 wst->n_uid, wst->n_gid, wst->n_muid);
1470 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst);
1476 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
1478 p9_free_req(clnt, req);
1482 EXPORT_SYMBOL(p9_client_wstat);
1484 int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr)
1487 struct p9_req_t *req;
1488 struct p9_client *clnt;
1492 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid);
1493 P9_DPRINTK(P9_DEBUG_9P,
1494 " valid=%x mode=%x uid=%d gid=%d size=%lld\n"
1495 " atime_sec=%lld atime_nsec=%lld\n"
1496 " mtime_sec=%lld mtime_nsec=%lld\n",
1497 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid,
1498 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec,
1499 p9attr->mtime_sec, p9attr->mtime_nsec);
1501 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr);
1507 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid);
1508 p9_free_req(clnt, req);
1512 EXPORT_SYMBOL(p9_client_setattr);
1514 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
1517 struct p9_req_t *req;
1518 struct p9_client *clnt;
1523 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid);
1525 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid);
1531 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,
1532 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
1533 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
1535 p9pdu_dump(1, req->rc);
1536 p9_free_req(clnt, req);
1540 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
1541 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
1542 "fsid %llu namelen %ld\n",
1543 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize,
1544 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree,
1545 sb->fsid, (long int)sb->namelen);
1547 p9_free_req(clnt, req);
1551 EXPORT_SYMBOL(p9_client_statfs);
1553 int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)
1556 struct p9_req_t *req;
1557 struct p9_client *clnt;
1562 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n",
1563 fid->fid, newdirfid->fid, name);
1565 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid,
1566 newdirfid->fid, name);
1572 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid);
1574 p9_free_req(clnt, req);
1578 EXPORT_SYMBOL(p9_client_rename);
1581 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
1583 struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
1584 const char *attr_name, u64 *attr_size)
1587 struct p9_req_t *req;
1588 struct p9_client *clnt;
1589 struct p9_fid *attr_fid;
1592 clnt = file_fid->clnt;
1593 attr_fid = p9_fid_create(clnt);
1594 if (IS_ERR(attr_fid)) {
1595 err = PTR_ERR(attr_fid);
1599 P9_DPRINTK(P9_DEBUG_9P,
1600 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
1601 file_fid->fid, attr_fid->fid, attr_name);
1603 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",
1604 file_fid->fid, attr_fid->fid, attr_name);
1609 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
1611 p9pdu_dump(1, req->rc);
1612 p9_free_req(clnt, req);
1615 p9_free_req(clnt, req);
1616 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n",
1617 attr_fid->fid, *attr_size);
1620 p9_client_clunk(attr_fid);
1623 if (attr_fid && (attr_fid != file_fid))
1624 p9_fid_destroy(attr_fid);
1626 return ERR_PTR(err);
1628 EXPORT_SYMBOL_GPL(p9_client_xattrwalk);
1630 int p9_client_xattrcreate(struct p9_fid *fid, const char *name,
1631 u64 attr_size, int flags)
1634 struct p9_req_t *req;
1635 struct p9_client *clnt;
1637 P9_DPRINTK(P9_DEBUG_9P,
1638 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n",
1639 fid->fid, name, (long long)attr_size, flags);
1642 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd",
1643 fid->fid, name, attr_size, flags);
1648 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid);
1649 p9_free_req(clnt, req);
1653 EXPORT_SYMBOL_GPL(p9_client_xattrcreate);
1655 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
1657 int err, rsize, total;
1658 struct p9_client *clnt;
1659 struct p9_req_t *req;
1662 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n",
1663 fid->fid, (long long unsigned) offset, count);
1669 rsize = fid->iounit;
1670 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ)
1671 rsize = clnt->msize - P9_READDIRHDRSZ;
1676 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize);
1682 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1684 p9pdu_dump(1, req->rc);
1685 goto free_and_error;
1688 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count);
1691 memmove(data, dataptr, count);
1693 p9_free_req(clnt, req);
1697 p9_free_req(clnt, req);
1701 EXPORT_SYMBOL(p9_client_readdir);
1703 int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,
1704 dev_t rdev, gid_t gid, struct p9_qid *qid)
1707 struct p9_client *clnt;
1708 struct p9_req_t *req;
1712 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d "
1713 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev));
1714 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode,
1715 MAJOR(rdev), MINOR(rdev), gid);
1717 return PTR_ERR(req);
1719 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1721 p9pdu_dump(1, req->rc);
1724 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
1725 (unsigned long long)qid->path, qid->version);
1728 p9_free_req(clnt, req);
1732 EXPORT_SYMBOL(p9_client_mknod_dotl);
1734 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
1735 gid_t gid, struct p9_qid *qid)
1738 struct p9_client *clnt;
1739 struct p9_req_t *req;
1743 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n",
1744 fid->fid, name, mode, gid);
1745 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode,
1748 return PTR_ERR(req);
1750 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1752 p9pdu_dump(1, req->rc);
1755 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
1756 (unsigned long long)qid->path, qid->version);
1759 p9_free_req(clnt, req);
1763 EXPORT_SYMBOL(p9_client_mkdir_dotl);