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(char *s)
77 int version = -EINVAL;
79 if (!strcmp(s, "9p2000")) {
80 version = p9_proto_legacy;
81 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n");
82 } else if (!strcmp(s, "9p2000.u")) {
83 version = p9_proto_2000u;
84 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n");
85 } else if (!strcmp(s, "9p2000.L")) {
86 version = p9_proto_2000L;
87 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n");
89 printk(KERN_INFO "9p: Unknown protocol version %s.\n", s);
95 * parse_options - parse mount options into client structure
96 * @opts: options string passed from mount
97 * @clnt: existing v9fs client information
99 * Return 0 upon success, -ERRNO upon failure
102 static int parse_opts(char *opts, struct p9_client *clnt)
104 char *options, *tmp_options;
106 substring_t args[MAX_OPT_ARGS];
111 clnt->proto_version = p9_proto_2000u;
117 tmp_options = kstrdup(opts, GFP_KERNEL);
119 P9_DPRINTK(P9_DEBUG_ERROR,
120 "failed to allocate copy of option string\n");
123 options = tmp_options;
125 while ((p = strsep(&options, ",")) != NULL) {
129 token = match_token(p, tokens, args);
132 r = match_int(&args[0], &option);
134 P9_DPRINTK(P9_DEBUG_ERROR,
135 "integer field, but no integer?\n");
139 clnt->msize = option;
142 s = match_strdup(&args[0]);
145 P9_DPRINTK(P9_DEBUG_ERROR,
146 "problem allocating copy of trans arg\n");
147 goto free_and_return;
149 clnt->trans_mod = v9fs_get_trans_by_name(s);
150 if (clnt->trans_mod == NULL) {
152 "9p: Could not find "
153 "request transport: %s\n", s);
156 goto free_and_return;
161 clnt->proto_version = p9_proto_legacy;
164 s = match_strdup(&args[0]);
167 P9_DPRINTK(P9_DEBUG_ERROR,
168 "problem allocating copy of version arg\n");
169 goto free_and_return;
171 ret = get_protocol_version(s);
172 if (ret == -EINVAL) {
174 goto free_and_return;
177 clnt->proto_version = ret;
190 * p9_tag_alloc - lookup/allocate a request by tag
191 * @c: client session to lookup tag within
192 * @tag: numeric id for transaction
194 * this is a simple array lookup, but will grow the
195 * request_slots as necessary to accommodate transaction
196 * ids which did not previously have a slot.
198 * this code relies on the client spinlock to manage locks, its
199 * possible we should switch to something else, but I'd rather
200 * stick with something low-overhead for the common case.
204 static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag, int max_size)
208 struct p9_req_t *req;
209 int alloc_msize = min(c->msize, max_size);
211 /* This looks up the original request by tag so we know which
212 * buffer to read the data into */
215 if (tag >= c->max_tag) {
216 spin_lock_irqsave(&c->lock, flags);
217 /* check again since original check was outside of lock */
218 while (tag >= c->max_tag) {
219 row = (tag / P9_ROW_MAXTAG);
220 c->reqs[row] = kcalloc(P9_ROW_MAXTAG,
221 sizeof(struct p9_req_t), GFP_ATOMIC);
224 printk(KERN_ERR "Couldn't grow tag array\n");
225 spin_unlock_irqrestore(&c->lock, flags);
226 return ERR_PTR(-ENOMEM);
228 for (col = 0; col < P9_ROW_MAXTAG; col++) {
229 c->reqs[row][col].status = REQ_STATUS_IDLE;
230 c->reqs[row][col].tc = NULL;
232 c->max_tag += P9_ROW_MAXTAG;
234 spin_unlock_irqrestore(&c->lock, flags);
236 row = tag / P9_ROW_MAXTAG;
237 col = tag % P9_ROW_MAXTAG;
239 req = &c->reqs[row][col];
241 req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS);
243 printk(KERN_ERR "Couldn't grow tag array\n");
244 return ERR_PTR(-ENOMEM);
246 init_waitqueue_head(req->wq);
247 req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
249 req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
251 if ((!req->tc) || (!req->rc)) {
252 printk(KERN_ERR "Couldn't grow tag array\n");
256 req->tc = req->rc = NULL;
258 return ERR_PTR(-ENOMEM);
260 req->tc->capacity = alloc_msize;
261 req->rc->capacity = alloc_msize;
262 req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
263 req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
266 p9pdu_reset(req->tc);
267 p9pdu_reset(req->rc);
269 req->tc->tag = tag-1;
270 req->status = REQ_STATUS_ALLOC;
272 return &c->reqs[row][col];
276 * p9_tag_lookup - lookup a request by tag
277 * @c: client session to lookup tag within
278 * @tag: numeric id for transaction
282 struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
286 /* This looks up the original request by tag so we know which
287 * buffer to read the data into */
290 if(tag >= c->max_tag)
293 row = tag / P9_ROW_MAXTAG;
294 col = tag % P9_ROW_MAXTAG;
296 return &c->reqs[row][col];
298 EXPORT_SYMBOL(p9_tag_lookup);
301 * p9_tag_init - setup tags structure and contents
302 * @c: v9fs client struct
304 * This initializes the tags structure for each client instance.
308 static int p9_tag_init(struct p9_client *c)
312 c->tagpool = p9_idpool_create();
313 if (IS_ERR(c->tagpool)) {
314 err = PTR_ERR(c->tagpool);
317 err = p9_idpool_get(c->tagpool); /* reserve tag 0 */
319 p9_idpool_destroy(c->tagpool);
328 * p9_tag_cleanup - cleans up tags structure and reclaims resources
329 * @c: v9fs client struct
331 * This frees resources associated with the tags structure
334 static void p9_tag_cleanup(struct p9_client *c)
338 /* check to insure all requests are idle */
339 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
340 for (col = 0; col < P9_ROW_MAXTAG; col++) {
341 if (c->reqs[row][col].status != REQ_STATUS_IDLE) {
342 P9_DPRINTK(P9_DEBUG_MUX,
343 "Attempting to cleanup non-free tag %d,%d\n",
345 /* TODO: delay execution of cleanup */
352 p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */
353 p9_idpool_destroy(c->tagpool);
356 /* free requests associated with tags */
357 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
358 for (col = 0; col < P9_ROW_MAXTAG; col++) {
359 kfree(c->reqs[row][col].wq);
360 kfree(c->reqs[row][col].tc);
361 kfree(c->reqs[row][col].rc);
369 * p9_free_req - free a request and clean-up as necessary
371 * r: request to release
375 static void p9_free_req(struct p9_client *c, struct p9_req_t *r)
377 int tag = r->tc->tag;
378 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag);
380 r->status = REQ_STATUS_IDLE;
381 if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool))
382 p9_idpool_put(tag, c->tagpool);
386 * p9_client_cb - call back from transport to client
388 * req: request received
391 void p9_client_cb(struct p9_client *c, struct p9_req_t *req)
393 P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag);
395 P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
397 EXPORT_SYMBOL(p9_client_cb);
400 * p9_parse_header - parse header arguments out of a packet
401 * @pdu: packet to parse
402 * @size: size of packet
403 * @type: type of request
404 * @tag: tag of packet
405 * @rewind: set if we need to rewind offset afterwards
409 p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag,
415 int offset = pdu->offset;
422 err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag);
424 goto rewind_and_exit;
430 P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size,
443 pdu->offset = offset;
446 EXPORT_SYMBOL(p9_parse_header);
449 * p9_check_errors - check 9p packet for error return and process it
450 * @c: current client instance
451 * @req: request to parse and check for error conditions
453 * returns error code if one is discovered, otherwise returns 0
455 * this will have to be more complicated if we have multiple
459 static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
465 err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
467 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
471 if (type != P9_RERROR && type != P9_RLERROR)
474 if (!p9_is_proto_dotl(c)) {
476 err = p9pdu_readf(req->rc, c->proto_version, "s?d",
481 if (p9_is_proto_dotu(c))
484 if (!err || !IS_ERR_VALUE(err)) {
485 err = p9_errstr2errno(ename, strlen(ename));
487 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n",
492 err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
495 P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
501 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);
507 * p9_check_zc_errors - check 9p packet for error return and process it
508 * @c: current client instance
509 * @req: request to parse and check for error conditions
510 * @in_hdrlen: Size of response protocol buffer.
512 * returns error code if one is discovered, otherwise returns 0
514 * this will have to be more complicated if we have multiple
518 static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req,
519 char *uidata, int in_hdrlen, int kern_buf)
526 err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
528 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
532 if (type != P9_RERROR && type != P9_RLERROR)
535 if (!p9_is_proto_dotl(c)) {
536 /* Error is reported in string format */
538 /* 7 = header size for RERROR, 2 is the size of string len; */
539 int inline_len = in_hdrlen - (7 + 2);
541 /* Read the size of error string */
542 err = p9pdu_readf(req->rc, c->proto_version, "w", &len);
546 ename = kmalloc(len + 1, GFP_NOFS);
551 if (len <= inline_len) {
552 /* We have error in protocol buffer itself */
553 if (pdu_read(req->rc, ename, len)) {
560 * Part of the data is in user space buffer.
562 if (pdu_read(req->rc, ename, inline_len)) {
568 memcpy(ename + inline_len, uidata,
571 err = copy_from_user(ename + inline_len,
572 uidata, len - inline_len);
580 if (p9_is_proto_dotu(c)) {
581 /* For dotu we also have error code */
582 err = p9pdu_readf(req->rc,
583 c->proto_version, "d", &ecode);
588 if (!err || !IS_ERR_VALUE(err)) {
589 err = p9_errstr2errno(ename, strlen(ename));
591 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n",
596 err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
599 P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
606 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);
610 static struct p9_req_t *
611 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...);
614 * p9_client_flush - flush (cancel) a request
616 * @oldreq: request to cancel
618 * This sents a flush for a particular request and links
619 * the flush request to the original request. The current
620 * code only supports a single flush request although the protocol
621 * allows for multiple flush requests to be sent for a single request.
625 static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
627 struct p9_req_t *req;
631 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
635 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
637 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
642 /* if we haven't received a response for oldreq,
643 remove it from the list. */
645 if (oldreq->status == REQ_STATUS_FLSH)
646 list_del(&oldreq->req_list);
647 spin_unlock(&c->lock);
653 static struct p9_req_t *p9_client_prepare_req(struct p9_client *c,
654 int8_t type, int req_size,
655 const char *fmt, va_list ap)
658 struct p9_req_t *req;
660 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
662 /* we allow for any status other than disconnected */
663 if (c->status == Disconnected)
664 return ERR_PTR(-EIO);
666 /* if status is begin_disconnected we allow only clunk request */
667 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK))
668 return ERR_PTR(-EIO);
671 if (type != P9_TVERSION) {
672 tag = p9_idpool_get(c->tagpool);
674 return ERR_PTR(-ENOMEM);
677 req = p9_tag_alloc(c, tag, req_size);
681 /* marshall the data */
682 p9pdu_prepare(req->tc, tag, type);
683 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
686 p9pdu_finalize(req->tc);
694 * p9_client_rpc - issue a request and wait for a response
696 * @type: type of request
697 * @fmt: protocol format string (see protocol.c)
699 * Returns request structure (which client must free using p9_free_req)
702 static struct p9_req_t *
703 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
708 struct p9_req_t *req;
711 req = p9_client_prepare_req(c, type, c->msize, fmt, ap);
716 if (signal_pending(current)) {
718 clear_thread_flag(TIF_SIGPENDING);
722 err = c->trans_mod->request(c, req);
724 if (err != -ERESTARTSYS && err != -EFAULT)
725 c->status = Disconnected;
728 /* Wait for the response */
729 err = wait_event_interruptible(*req->wq,
730 req->status >= REQ_STATUS_RCVD);
732 if (req->status == REQ_STATUS_ERROR) {
733 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
736 if ((err == -ERESTARTSYS) && (c->status == Connected)) {
737 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
739 clear_thread_flag(TIF_SIGPENDING);
741 if (c->trans_mod->cancel(c, req))
742 p9_client_flush(c, req);
744 /* if we received the response anyway, don't signal error */
745 if (req->status == REQ_STATUS_RCVD)
749 spin_lock_irqsave(¤t->sighand->siglock, flags);
751 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
756 err = p9_check_errors(c, req);
758 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
762 P9_DPRINTK(P9_DEBUG_MUX,
763 "exit: client %p op %d error: %d\n", c, type, err);
769 * p9_client_zc_rpc - issue a request and wait for a response
771 * @type: type of request
772 * @uidata: user bffer that should be ued for zero copy read
773 * @uodata: user buffer that shoud be user for zero copy write
774 * @inlen: read buffer size
775 * @olen: write buffer size
776 * @hdrlen: reader header size, This is the size of response protocol data
777 * @fmt: protocol format string (see protocol.c)
779 * Returns request structure (which client must free using p9_free_req)
781 static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
782 char *uidata, char *uodata,
783 int inlen, int olen, int in_hdrlen,
784 int kern_buf, const char *fmt, ...)
789 struct p9_req_t *req;
793 * We allocate a inline protocol data of only 4k bytes.
794 * The actual content is passed in zero-copy fashion.
796 req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap);
801 if (signal_pending(current)) {
803 clear_thread_flag(TIF_SIGPENDING);
807 /* If we are called with KERNEL_DS force kern_buf */
808 if (segment_eq(get_fs(), KERNEL_DS))
811 err = c->trans_mod->zc_request(c, req, uidata, uodata,
812 inlen, olen, in_hdrlen, kern_buf);
815 c->status = Disconnected;
818 if (req->status == REQ_STATUS_ERROR) {
819 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
822 if ((err == -ERESTARTSYS) && (c->status == Connected)) {
823 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
825 clear_thread_flag(TIF_SIGPENDING);
827 if (c->trans_mod->cancel(c, req))
828 p9_client_flush(c, req);
830 /* if we received the response anyway, don't signal error */
831 if (req->status == REQ_STATUS_RCVD)
835 spin_lock_irqsave(¤t->sighand->siglock, flags);
837 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
842 err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf);
844 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
848 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
854 static struct p9_fid *p9_fid_create(struct p9_client *clnt)
860 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
861 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
863 return ERR_PTR(-ENOMEM);
865 ret = p9_idpool_get(clnt->fidpool);
872 memset(&fid->qid, 0, sizeof(struct p9_qid));
874 fid->uid = current_fsuid();
877 spin_lock_irqsave(&clnt->lock, flags);
878 list_add(&fid->flist, &clnt->fidlist);
879 spin_unlock_irqrestore(&clnt->lock, flags);
888 static void p9_fid_destroy(struct p9_fid *fid)
890 struct p9_client *clnt;
893 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
895 p9_idpool_put(fid->fid, clnt->fidpool);
896 spin_lock_irqsave(&clnt->lock, flags);
897 list_del(&fid->flist);
898 spin_unlock_irqrestore(&clnt->lock, flags);
903 static int p9_client_version(struct p9_client *c)
906 struct p9_req_t *req;
910 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",
911 c->msize, c->proto_version);
913 switch (c->proto_version) {
915 req = p9_client_rpc(c, P9_TVERSION, "ds",
916 c->msize, "9P2000.L");
919 req = p9_client_rpc(c, P9_TVERSION, "ds",
920 c->msize, "9P2000.u");
922 case p9_proto_legacy:
923 req = p9_client_rpc(c, P9_TVERSION, "ds",
934 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
936 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
937 P9_DUMP_PKT(1, req->rc);
941 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
942 if (!strncmp(version, "9P2000.L", 8))
943 c->proto_version = p9_proto_2000L;
944 else if (!strncmp(version, "9P2000.u", 8))
945 c->proto_version = p9_proto_2000u;
946 else if (!strncmp(version, "9P2000", 6))
947 c->proto_version = p9_proto_legacy;
953 if (msize < c->msize)
963 struct p9_client *p9_client_create(const char *dev_name, char *options)
966 struct p9_client *clnt;
969 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
971 return ERR_PTR(-ENOMEM);
973 clnt->trans_mod = NULL;
975 spin_lock_init(&clnt->lock);
976 INIT_LIST_HEAD(&clnt->fidlist);
978 err = p9_tag_init(clnt);
982 err = parse_opts(options, clnt);
984 goto destroy_tagpool;
986 if (!clnt->trans_mod)
987 clnt->trans_mod = v9fs_get_default_trans();
989 if (clnt->trans_mod == NULL) {
990 err = -EPROTONOSUPPORT;
991 P9_DPRINTK(P9_DEBUG_ERROR,
992 "No transport defined or default transport\n");
993 goto destroy_tagpool;
996 clnt->fidpool = p9_idpool_create();
997 if (IS_ERR(clnt->fidpool)) {
998 err = PTR_ERR(clnt->fidpool);
1002 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
1003 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
1005 err = clnt->trans_mod->create(clnt, dev_name, options);
1007 goto destroy_fidpool;
1009 if (clnt->msize > clnt->trans_mod->maxsize)
1010 clnt->msize = clnt->trans_mod->maxsize;
1012 err = p9_client_version(clnt);
1019 clnt->trans_mod->close(clnt);
1021 p9_idpool_destroy(clnt->fidpool);
1023 v9fs_put_trans(clnt->trans_mod);
1025 p9_idpool_destroy(clnt->tagpool);
1028 return ERR_PTR(err);
1030 EXPORT_SYMBOL(p9_client_create);
1032 void p9_client_destroy(struct p9_client *clnt)
1034 struct p9_fid *fid, *fidptr;
1036 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
1038 if (clnt->trans_mod)
1039 clnt->trans_mod->close(clnt);
1041 v9fs_put_trans(clnt->trans_mod);
1043 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) {
1044 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid);
1045 p9_fid_destroy(fid);
1049 p9_idpool_destroy(clnt->fidpool);
1051 p9_tag_cleanup(clnt);
1055 EXPORT_SYMBOL(p9_client_destroy);
1057 void p9_client_disconnect(struct p9_client *clnt)
1059 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
1060 clnt->status = Disconnected;
1062 EXPORT_SYMBOL(p9_client_disconnect);
1064 void p9_client_begin_disconnect(struct p9_client *clnt)
1066 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
1067 clnt->status = BeginDisconnect;
1069 EXPORT_SYMBOL(p9_client_begin_disconnect);
1071 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
1072 char *uname, u32 n_uname, char *aname)
1075 struct p9_req_t *req;
1079 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
1080 afid ? afid->fid : -1, uname, aname);
1083 fid = p9_fid_create(clnt);
1090 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
1091 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
1097 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
1099 P9_DUMP_PKT(1, req->rc);
1100 p9_free_req(clnt, req);
1104 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
1106 (unsigned long long)qid.path,
1109 memmove(&fid->qid, &qid, sizeof(struct p9_qid));
1111 p9_free_req(clnt, req);
1116 p9_fid_destroy(fid);
1117 return ERR_PTR(err);
1119 EXPORT_SYMBOL(p9_client_attach);
1121 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,
1122 char **wnames, int clone)
1125 struct p9_client *clnt;
1127 struct p9_qid *wqids;
1128 struct p9_req_t *req;
1129 uint16_t nwqids, count;
1133 clnt = oldfid->clnt;
1135 fid = p9_fid_create(clnt);
1142 fid->uid = oldfid->uid;
1147 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n",
1148 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
1150 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
1157 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
1159 P9_DUMP_PKT(1, req->rc);
1160 p9_free_req(clnt, req);
1163 p9_free_req(clnt, req);
1165 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
1167 if (nwqids != nwname) {
1172 for (count = 0; count < nwqids; count++)
1173 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
1174 count, wqids[count].type,
1175 (unsigned long long)wqids[count].path,
1176 wqids[count].version);
1179 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
1181 fid->qid = oldfid->qid;
1188 p9_client_clunk(fid);
1192 if (fid && (fid != oldfid))
1193 p9_fid_destroy(fid);
1195 return ERR_PTR(err);
1197 EXPORT_SYMBOL(p9_client_walk);
1199 int p9_client_open(struct p9_fid *fid, int mode)
1202 struct p9_client *clnt;
1203 struct p9_req_t *req;
1208 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
1209 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
1212 if (fid->mode != -1)
1215 if (p9_is_proto_dotl(clnt))
1216 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
1218 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
1224 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1226 P9_DUMP_PKT(1, req->rc);
1227 goto free_and_error;
1230 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
1231 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type,
1232 (unsigned long long)qid.path, qid.version, iounit);
1235 fid->iounit = iounit;
1238 p9_free_req(clnt, req);
1242 EXPORT_SYMBOL(p9_client_open);
1244 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
1245 gid_t gid, struct p9_qid *qid)
1248 struct p9_client *clnt;
1249 struct p9_req_t *req;
1252 P9_DPRINTK(P9_DEBUG_9P,
1253 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n",
1254 ofid->fid, name, flags, mode, gid);
1257 if (ofid->mode != -1)
1260 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags,
1267 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
1269 P9_DUMP_PKT(1, req->rc);
1270 goto free_and_error;
1273 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n",
1275 (unsigned long long)qid->path,
1276 qid->version, iounit);
1279 ofid->iounit = iounit;
1282 p9_free_req(clnt, req);
1286 EXPORT_SYMBOL(p9_client_create_dotl);
1288 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
1292 struct p9_client *clnt;
1293 struct p9_req_t *req;
1297 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1298 fid->fid, name, perm, mode);
1302 if (fid->mode != -1)
1305 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
1312 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1314 P9_DUMP_PKT(1, req->rc);
1315 goto free_and_error;
1318 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1320 (unsigned long long)qid.path,
1321 qid.version, iounit);
1324 fid->iounit = iounit;
1327 p9_free_req(clnt, req);
1331 EXPORT_SYMBOL(p9_client_fcreate);
1333 int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,
1337 struct p9_client *clnt;
1338 struct p9_req_t *req;
1340 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n",
1341 dfid->fid, name, symtgt);
1344 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt,
1351 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1353 P9_DUMP_PKT(1, req->rc);
1354 goto free_and_error;
1357 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n",
1358 qid->type, (unsigned long long)qid->path, qid->version);
1361 p9_free_req(clnt, req);
1365 EXPORT_SYMBOL(p9_client_symlink);
1367 int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
1369 struct p9_client *clnt;
1370 struct p9_req_t *req;
1372 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
1373 dfid->fid, oldfid->fid, newname);
1375 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
1378 return PTR_ERR(req);
1380 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
1381 p9_free_req(clnt, req);
1384 EXPORT_SYMBOL(p9_client_link);
1386 int p9_client_fsync(struct p9_fid *fid, int datasync)
1389 struct p9_client *clnt;
1390 struct p9_req_t *req;
1392 P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n",
1393 fid->fid, datasync);
1397 req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync);
1403 P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid);
1405 p9_free_req(clnt, req);
1410 EXPORT_SYMBOL(p9_client_fsync);
1412 int p9_client_clunk(struct p9_fid *fid)
1415 struct p9_client *clnt;
1416 struct p9_req_t *req;
1419 P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n");
1424 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
1428 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
1434 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
1436 p9_free_req(clnt, req);
1439 * Fid is not valid even after a failed clunk
1441 p9_fid_destroy(fid);
1444 EXPORT_SYMBOL(p9_client_clunk);
1446 int p9_client_remove(struct p9_fid *fid)
1449 struct p9_client *clnt;
1450 struct p9_req_t *req;
1452 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
1456 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
1462 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
1464 p9_free_req(clnt, req);
1466 p9_fid_destroy(fid);
1469 EXPORT_SYMBOL(p9_client_remove);
1471 int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags)
1474 struct p9_req_t *req;
1475 struct p9_client *clnt;
1477 P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n",
1478 dfid->fid, name, flags);
1481 req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags);
1486 P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name);
1488 p9_free_req(clnt, req);
1492 EXPORT_SYMBOL(p9_client_unlinkat);
1495 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
1500 struct p9_req_t *req;
1501 struct p9_client *clnt;
1502 int err, rsize, non_zc = 0;
1505 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n",
1506 fid->fid, (long long unsigned) offset, count);
1510 rsize = fid->iounit;
1511 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1512 rsize = clnt->msize - P9_IOHDRSZ;
1517 /* Don't bother zerocopy for small IO (< 1024) */
1518 if (clnt->trans_mod->zc_request && rsize > 1024) {
1524 indata = (char *)udata;
1526 * response header len is 11
1527 * PDU Header(7) + IO Size (4)
1529 req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0,
1530 11, kernel_buf, "dqd", fid->fid,
1534 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset,
1542 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1544 P9_DUMP_PKT(1, req->rc);
1545 goto free_and_error;
1548 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
1549 P9_DUMP_PKT(1, req->rc);
1553 memmove(data, dataptr, count);
1555 err = copy_to_user(udata, dataptr, count);
1558 goto free_and_error;
1562 p9_free_req(clnt, req);
1566 p9_free_req(clnt, req);
1570 EXPORT_SYMBOL(p9_client_read);
1573 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
1574 u64 offset, u32 count)
1578 struct p9_client *clnt;
1579 struct p9_req_t *req;
1581 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
1582 fid->fid, (long long unsigned) offset, count);
1586 rsize = fid->iounit;
1587 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1588 rsize = clnt->msize - P9_IOHDRSZ;
1593 /* Don't bother zerocopy for small IO (< 1024) */
1594 if (clnt->trans_mod->zc_request && rsize > 1024) {
1600 odata = (char *)udata;
1601 req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize,
1602 P9_ZC_HDR_SZ, kernel_buf, "dqd",
1603 fid->fid, offset, rsize);
1606 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid,
1607 offset, rsize, data);
1609 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid,
1610 offset, rsize, udata);
1617 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
1619 P9_DUMP_PKT(1, req->rc);
1620 goto free_and_error;
1623 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
1625 p9_free_req(clnt, req);
1629 p9_free_req(clnt, req);
1633 EXPORT_SYMBOL(p9_client_write);
1635 struct p9_wstat *p9_client_stat(struct p9_fid *fid)
1638 struct p9_client *clnt;
1639 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
1640 struct p9_req_t *req;
1643 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
1646 return ERR_PTR(-ENOMEM);
1651 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
1657 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
1659 P9_DUMP_PKT(1, req->rc);
1660 p9_free_req(clnt, req);
1664 P9_DPRINTK(P9_DEBUG_9P,
1665 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1666 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1667 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1668 "<<< uid=%d gid=%d n_muid=%d\n",
1669 ret->size, ret->type, ret->dev, ret->qid.type,
1670 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode,
1671 ret->atime, ret->mtime, (unsigned long long)ret->length,
1672 ret->name, ret->uid, ret->gid, ret->muid, ret->extension,
1673 ret->n_uid, ret->n_gid, ret->n_muid);
1675 p9_free_req(clnt, req);
1680 return ERR_PTR(err);
1682 EXPORT_SYMBOL(p9_client_stat);
1684 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
1688 struct p9_client *clnt;
1689 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl),
1691 struct p9_req_t *req;
1693 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n",
1694 fid->fid, request_mask);
1697 return ERR_PTR(-ENOMEM);
1702 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask);
1708 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
1710 P9_DUMP_PKT(1, req->rc);
1711 p9_free_req(clnt, req);
1715 P9_DPRINTK(P9_DEBUG_9P,
1716 "<<< RGETATTR st_result_mask=%lld\n"
1717 "<<< qid=%x.%llx.%x\n"
1718 "<<< st_mode=%8.8x st_nlink=%llu\n"
1719 "<<< st_uid=%d st_gid=%d\n"
1720 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n"
1721 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n"
1722 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n"
1723 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n"
1724 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n"
1725 "<<< st_gen=%lld st_data_version=%lld",
1726 ret->st_result_mask, ret->qid.type, ret->qid.path,
1727 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid,
1728 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize,
1729 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec,
1730 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec,
1731 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec,
1732 ret->st_gen, ret->st_data_version);
1734 p9_free_req(clnt, req);
1739 return ERR_PTR(err);
1741 EXPORT_SYMBOL(p9_client_getattr_dotl);
1743 static int p9_client_statsize(struct p9_wstat *wst, int proto_version)
1747 /* NOTE: size shouldn't include its own length */
1748 /* size[2] type[2] dev[4] qid[13] */
1749 /* mode[4] atime[4] mtime[4] length[8]*/
1750 /* name[s] uid[s] gid[s] muid[s] */
1751 ret = 2+4+13+4+4+4+8+2+2+2+2;
1754 ret += strlen(wst->name);
1756 ret += strlen(wst->uid);
1758 ret += strlen(wst->gid);
1760 ret += strlen(wst->muid);
1762 if ((proto_version == p9_proto_2000u) ||
1763 (proto_version == p9_proto_2000L)) {
1764 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
1766 ret += strlen(wst->extension);
1772 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
1775 struct p9_req_t *req;
1776 struct p9_client *clnt;
1780 wst->size = p9_client_statsize(wst, clnt->proto_version);
1781 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
1782 P9_DPRINTK(P9_DEBUG_9P,
1783 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1784 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1785 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1786 " uid=%d gid=%d n_muid=%d\n",
1787 wst->size, wst->type, wst->dev, wst->qid.type,
1788 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode,
1789 wst->atime, wst->mtime, (unsigned long long)wst->length,
1790 wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
1791 wst->n_uid, wst->n_gid, wst->n_muid);
1793 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst);
1799 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
1801 p9_free_req(clnt, req);
1805 EXPORT_SYMBOL(p9_client_wstat);
1807 int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr)
1810 struct p9_req_t *req;
1811 struct p9_client *clnt;
1815 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid);
1816 P9_DPRINTK(P9_DEBUG_9P,
1817 " valid=%x mode=%x uid=%d gid=%d size=%lld\n"
1818 " atime_sec=%lld atime_nsec=%lld\n"
1819 " mtime_sec=%lld mtime_nsec=%lld\n",
1820 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid,
1821 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec,
1822 p9attr->mtime_sec, p9attr->mtime_nsec);
1824 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr);
1830 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid);
1831 p9_free_req(clnt, req);
1835 EXPORT_SYMBOL(p9_client_setattr);
1837 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
1840 struct p9_req_t *req;
1841 struct p9_client *clnt;
1846 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid);
1848 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid);
1854 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,
1855 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
1856 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
1858 P9_DUMP_PKT(1, req->rc);
1859 p9_free_req(clnt, req);
1863 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
1864 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
1865 "fsid %llu namelen %ld\n",
1866 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize,
1867 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree,
1868 sb->fsid, (long int)sb->namelen);
1870 p9_free_req(clnt, req);
1874 EXPORT_SYMBOL(p9_client_statfs);
1876 int p9_client_rename(struct p9_fid *fid,
1877 struct p9_fid *newdirfid, const char *name)
1880 struct p9_req_t *req;
1881 struct p9_client *clnt;
1886 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n",
1887 fid->fid, newdirfid->fid, name);
1889 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid,
1890 newdirfid->fid, name);
1896 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid);
1898 p9_free_req(clnt, req);
1902 EXPORT_SYMBOL(p9_client_rename);
1904 int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name,
1905 struct p9_fid *newdirfid, const char *new_name)
1908 struct p9_req_t *req;
1909 struct p9_client *clnt;
1912 clnt = olddirfid->clnt;
1914 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s"
1915 " newdirfid %d new name %s\n", olddirfid->fid, old_name,
1916 newdirfid->fid, new_name);
1918 req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid,
1919 old_name, newdirfid->fid, new_name);
1925 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n",
1926 newdirfid->fid, new_name);
1928 p9_free_req(clnt, req);
1932 EXPORT_SYMBOL(p9_client_renameat);
1935 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
1937 struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
1938 const char *attr_name, u64 *attr_size)
1941 struct p9_req_t *req;
1942 struct p9_client *clnt;
1943 struct p9_fid *attr_fid;
1946 clnt = file_fid->clnt;
1947 attr_fid = p9_fid_create(clnt);
1948 if (IS_ERR(attr_fid)) {
1949 err = PTR_ERR(attr_fid);
1953 P9_DPRINTK(P9_DEBUG_9P,
1954 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
1955 file_fid->fid, attr_fid->fid, attr_name);
1957 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",
1958 file_fid->fid, attr_fid->fid, attr_name);
1963 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
1965 P9_DUMP_PKT(1, req->rc);
1966 p9_free_req(clnt, req);
1969 p9_free_req(clnt, req);
1970 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n",
1971 attr_fid->fid, *attr_size);
1974 p9_client_clunk(attr_fid);
1977 if (attr_fid && (attr_fid != file_fid))
1978 p9_fid_destroy(attr_fid);
1980 return ERR_PTR(err);
1982 EXPORT_SYMBOL_GPL(p9_client_xattrwalk);
1984 int p9_client_xattrcreate(struct p9_fid *fid, const char *name,
1985 u64 attr_size, int flags)
1988 struct p9_req_t *req;
1989 struct p9_client *clnt;
1991 P9_DPRINTK(P9_DEBUG_9P,
1992 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n",
1993 fid->fid, name, (long long)attr_size, flags);
1996 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd",
1997 fid->fid, name, attr_size, flags);
2002 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid);
2003 p9_free_req(clnt, req);
2007 EXPORT_SYMBOL_GPL(p9_client_xattrcreate);
2009 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
2011 int err, rsize, non_zc = 0;
2012 struct p9_client *clnt;
2013 struct p9_req_t *req;
2016 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n",
2017 fid->fid, (long long unsigned) offset, count);
2022 rsize = fid->iounit;
2023 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ)
2024 rsize = clnt->msize - P9_READDIRHDRSZ;
2029 /* Don't bother zerocopy for small IO (< 1024) */
2030 if (clnt->trans_mod->zc_request && rsize > 1024) {
2032 * response header len is 11
2033 * PDU Header(7) + IO Size (4)
2035 req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0,
2036 11, 1, "dqd", fid->fid, offset, rsize);
2039 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid,
2047 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
2049 P9_DUMP_PKT(1, req->rc);
2050 goto free_and_error;
2053 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count);
2056 memmove(data, dataptr, count);
2058 p9_free_req(clnt, req);
2062 p9_free_req(clnt, req);
2066 EXPORT_SYMBOL(p9_client_readdir);
2068 int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,
2069 dev_t rdev, gid_t gid, struct p9_qid *qid)
2072 struct p9_client *clnt;
2073 struct p9_req_t *req;
2077 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d "
2078 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev));
2079 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode,
2080 MAJOR(rdev), MINOR(rdev), gid);
2082 return PTR_ERR(req);
2084 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
2086 P9_DUMP_PKT(1, req->rc);
2089 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
2090 (unsigned long long)qid->path, qid->version);
2093 p9_free_req(clnt, req);
2097 EXPORT_SYMBOL(p9_client_mknod_dotl);
2099 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
2100 gid_t gid, struct p9_qid *qid)
2103 struct p9_client *clnt;
2104 struct p9_req_t *req;
2108 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n",
2109 fid->fid, name, mode, gid);
2110 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode,
2113 return PTR_ERR(req);
2115 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
2117 P9_DUMP_PKT(1, req->rc);
2120 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
2121 (unsigned long long)qid->path, qid->version);
2124 p9_free_req(clnt, req);
2128 EXPORT_SYMBOL(p9_client_mkdir_dotl);
2130 int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status)
2133 struct p9_client *clnt;
2134 struct p9_req_t *req;
2138 P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d "
2139 "start %lld length %lld proc_id %d client_id %s\n",
2140 fid->fid, flock->type, flock->flags, flock->start,
2141 flock->length, flock->proc_id, flock->client_id);
2143 req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type,
2144 flock->flags, flock->start, flock->length,
2145 flock->proc_id, flock->client_id);
2148 return PTR_ERR(req);
2150 err = p9pdu_readf(req->rc, clnt->proto_version, "b", status);
2152 P9_DUMP_PKT(1, req->rc);
2155 P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status);
2157 p9_free_req(clnt, req);
2161 EXPORT_SYMBOL(p9_client_lock_dotl);
2163 int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock)
2166 struct p9_client *clnt;
2167 struct p9_req_t *req;
2171 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld "
2172 "length %lld proc_id %d client_id %s\n", fid->fid, glock->type,
2173 glock->start, glock->length, glock->proc_id, glock->client_id);
2175 req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type,
2176 glock->start, glock->length, glock->proc_id, glock->client_id);
2179 return PTR_ERR(req);
2181 err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type,
2182 &glock->start, &glock->length, &glock->proc_id,
2185 P9_DUMP_PKT(1, req->rc);
2188 P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld "
2189 "proc_id %d client_id %s\n", glock->type, glock->start,
2190 glock->length, glock->proc_id, glock->client_id);
2192 p9_free_req(clnt, req);
2195 EXPORT_SYMBOL(p9_client_getlock_dotl);
2197 int p9_client_readlink(struct p9_fid *fid, char **target)
2200 struct p9_client *clnt;
2201 struct p9_req_t *req;
2205 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid);
2207 req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid);
2209 return PTR_ERR(req);
2211 err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);
2213 P9_DUMP_PKT(1, req->rc);
2216 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target);
2218 p9_free_req(clnt, req);
2221 EXPORT_SYMBOL(p9_client_readlink);