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>
41 #define CREATE_TRACE_POINTS
42 #include <trace/events/9p.h>
45 * Client Option Parsing (code inspired by NFS code)
46 * - a little lazy - parse all client options
57 static const match_table_t tokens = {
58 {Opt_msize, "msize=%u"},
59 {Opt_legacy, "noextend"},
60 {Opt_trans, "trans=%s"},
61 {Opt_version, "version=%s"},
65 inline int p9_is_proto_dotl(struct p9_client *clnt)
67 return clnt->proto_version == p9_proto_2000L;
69 EXPORT_SYMBOL(p9_is_proto_dotl);
71 inline int p9_is_proto_dotu(struct p9_client *clnt)
73 return clnt->proto_version == p9_proto_2000u;
75 EXPORT_SYMBOL(p9_is_proto_dotu);
77 /* Interpret mount option for protocol version */
78 static int get_protocol_version(char *s)
80 int version = -EINVAL;
82 if (!strcmp(s, "9p2000")) {
83 version = p9_proto_legacy;
84 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n");
85 } else if (!strcmp(s, "9p2000.u")) {
86 version = p9_proto_2000u;
87 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n");
88 } else if (!strcmp(s, "9p2000.L")) {
89 version = p9_proto_2000L;
90 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n");
92 printk(KERN_INFO "9p: Unknown protocol version %s.\n", s);
98 * parse_options - parse mount options into client structure
99 * @opts: options string passed from mount
100 * @clnt: existing v9fs client information
102 * Return 0 upon success, -ERRNO upon failure
105 static int parse_opts(char *opts, struct p9_client *clnt)
107 char *options, *tmp_options;
109 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);
135 r = match_int(&args[0], &option);
137 P9_DPRINTK(P9_DEBUG_ERROR,
138 "integer field, but no integer?\n");
142 clnt->msize = option;
145 s = match_strdup(&args[0]);
148 P9_DPRINTK(P9_DEBUG_ERROR,
149 "problem allocating copy of trans arg\n");
150 goto free_and_return;
152 clnt->trans_mod = v9fs_get_trans_by_name(s);
153 if (clnt->trans_mod == NULL) {
155 "9p: Could not find "
156 "request transport: %s\n", s);
159 goto free_and_return;
164 clnt->proto_version = p9_proto_legacy;
167 s = match_strdup(&args[0]);
170 P9_DPRINTK(P9_DEBUG_ERROR,
171 "problem allocating copy of version arg\n");
172 goto free_and_return;
174 ret = get_protocol_version(s);
175 if (ret == -EINVAL) {
177 goto free_and_return;
180 clnt->proto_version = ret;
193 * p9_tag_alloc - lookup/allocate a request by tag
194 * @c: client session to lookup tag within
195 * @tag: numeric id for transaction
197 * this is a simple array lookup, but will grow the
198 * request_slots as necessary to accommodate transaction
199 * ids which did not previously have a slot.
201 * this code relies on the client spinlock to manage locks, its
202 * possible we should switch to something else, but I'd rather
203 * stick with something low-overhead for the common case.
207 static struct p9_req_t *
208 p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size)
212 struct p9_req_t *req;
213 int alloc_msize = min(c->msize, max_size);
215 /* This looks up the original request by tag so we know which
216 * buffer to read the data into */
219 if (tag >= c->max_tag) {
220 spin_lock_irqsave(&c->lock, flags);
221 /* check again since original check was outside of lock */
222 while (tag >= c->max_tag) {
223 row = (tag / P9_ROW_MAXTAG);
224 c->reqs[row] = kcalloc(P9_ROW_MAXTAG,
225 sizeof(struct p9_req_t), GFP_ATOMIC);
228 printk(KERN_ERR "Couldn't grow tag array\n");
229 spin_unlock_irqrestore(&c->lock, flags);
230 return ERR_PTR(-ENOMEM);
232 for (col = 0; col < P9_ROW_MAXTAG; col++) {
233 c->reqs[row][col].status = REQ_STATUS_IDLE;
234 c->reqs[row][col].tc = NULL;
236 c->max_tag += P9_ROW_MAXTAG;
238 spin_unlock_irqrestore(&c->lock, flags);
240 row = tag / P9_ROW_MAXTAG;
241 col = tag % P9_ROW_MAXTAG;
243 req = &c->reqs[row][col];
245 req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS);
247 printk(KERN_ERR "Couldn't grow tag array\n");
248 return ERR_PTR(-ENOMEM);
250 init_waitqueue_head(req->wq);
251 req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
253 req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
255 if ((!req->tc) || (!req->rc)) {
256 printk(KERN_ERR "Couldn't grow tag array\n");
260 req->tc = req->rc = NULL;
262 return ERR_PTR(-ENOMEM);
264 req->tc->capacity = alloc_msize;
265 req->rc->capacity = alloc_msize;
266 req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
267 req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
270 p9pdu_reset(req->tc);
271 p9pdu_reset(req->rc);
273 req->tc->tag = tag-1;
274 req->status = REQ_STATUS_ALLOC;
276 return &c->reqs[row][col];
280 * p9_tag_lookup - lookup a request by tag
281 * @c: client session to lookup tag within
282 * @tag: numeric id for transaction
286 struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
290 /* This looks up the original request by tag so we know which
291 * buffer to read the data into */
294 if(tag >= c->max_tag)
297 row = tag / P9_ROW_MAXTAG;
298 col = tag % P9_ROW_MAXTAG;
300 return &c->reqs[row][col];
302 EXPORT_SYMBOL(p9_tag_lookup);
305 * p9_tag_init - setup tags structure and contents
306 * @c: v9fs client struct
308 * This initializes the tags structure for each client instance.
312 static int p9_tag_init(struct p9_client *c)
316 c->tagpool = p9_idpool_create();
317 if (IS_ERR(c->tagpool)) {
318 err = PTR_ERR(c->tagpool);
321 err = p9_idpool_get(c->tagpool); /* reserve tag 0 */
323 p9_idpool_destroy(c->tagpool);
332 * p9_tag_cleanup - cleans up tags structure and reclaims resources
333 * @c: v9fs client struct
335 * This frees resources associated with the tags structure
338 static void p9_tag_cleanup(struct p9_client *c)
342 /* check to insure all requests are idle */
343 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
344 for (col = 0; col < P9_ROW_MAXTAG; col++) {
345 if (c->reqs[row][col].status != REQ_STATUS_IDLE) {
346 P9_DPRINTK(P9_DEBUG_MUX,
347 "Attempting to cleanup non-free tag %d,%d\n",
349 /* TODO: delay execution of cleanup */
356 p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */
357 p9_idpool_destroy(c->tagpool);
360 /* free requests associated with tags */
361 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) {
362 for (col = 0; col < P9_ROW_MAXTAG; col++) {
363 kfree(c->reqs[row][col].wq);
364 kfree(c->reqs[row][col].tc);
365 kfree(c->reqs[row][col].rc);
373 * p9_free_req - free a request and clean-up as necessary
375 * r: request to release
379 static void p9_free_req(struct p9_client *c, struct p9_req_t *r)
381 int tag = r->tc->tag;
382 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag);
384 r->status = REQ_STATUS_IDLE;
385 if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool))
386 p9_idpool_put(tag, c->tagpool);
390 * p9_client_cb - call back from transport to client
392 * req: request received
395 void p9_client_cb(struct p9_client *c, struct p9_req_t *req)
397 P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag);
399 P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag);
401 EXPORT_SYMBOL(p9_client_cb);
404 * p9_parse_header - parse header arguments out of a packet
405 * @pdu: packet to parse
406 * @size: size of packet
407 * @type: type of request
408 * @tag: tag of packet
409 * @rewind: set if we need to rewind offset afterwards
413 p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag,
419 int offset = pdu->offset;
426 err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag);
428 goto rewind_and_exit;
434 P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size,
447 pdu->offset = offset;
450 EXPORT_SYMBOL(p9_parse_header);
453 * p9_check_errors - check 9p packet for error return and process it
454 * @c: current client instance
455 * @req: request to parse and check for error conditions
457 * returns error code if one is discovered, otherwise returns 0
459 * this will have to be more complicated if we have multiple
463 static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
469 err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
471 * dump the response from server
472 * This should be after check errors which poplulate pdu_fcall.
474 trace_9p_protocol_dump(c, req->rc);
476 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
479 if (type != P9_RERROR && type != P9_RLERROR)
482 if (!p9_is_proto_dotl(c)) {
484 err = p9pdu_readf(req->rc, c->proto_version, "s?d",
489 if (p9_is_proto_dotu(c))
492 if (!err || !IS_ERR_VALUE(err)) {
493 err = p9_errstr2errno(ename, strlen(ename));
495 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n",
500 err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
503 P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
509 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);
515 * p9_check_zc_errors - check 9p packet for error return and process it
516 * @c: current client instance
517 * @req: request to parse and check for error conditions
518 * @in_hdrlen: Size of response protocol buffer.
520 * returns error code if one is discovered, otherwise returns 0
522 * this will have to be more complicated if we have multiple
526 static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req,
527 char *uidata, int in_hdrlen, int kern_buf)
534 err = p9_parse_header(req->rc, NULL, &type, NULL, 0);
536 * dump the response from server
537 * This should be after parse_header which poplulate pdu_fcall.
539 trace_9p_protocol_dump(c, req->rc);
541 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err);
545 if (type != P9_RERROR && type != P9_RLERROR)
548 if (!p9_is_proto_dotl(c)) {
549 /* Error is reported in string format */
551 /* 7 = header size for RERROR, 2 is the size of string len; */
552 int inline_len = in_hdrlen - (7 + 2);
554 /* Read the size of error string */
555 err = p9pdu_readf(req->rc, c->proto_version, "w", &len);
559 ename = kmalloc(len + 1, GFP_NOFS);
564 if (len <= inline_len) {
565 /* We have error in protocol buffer itself */
566 if (pdu_read(req->rc, ename, len)) {
573 * Part of the data is in user space buffer.
575 if (pdu_read(req->rc, ename, inline_len)) {
581 memcpy(ename + inline_len, uidata,
584 err = copy_from_user(ename + inline_len,
585 uidata, len - inline_len);
593 if (p9_is_proto_dotu(c)) {
594 /* For dotu we also have error code */
595 err = p9pdu_readf(req->rc,
596 c->proto_version, "d", &ecode);
601 if (!err || !IS_ERR_VALUE(err)) {
602 err = p9_errstr2errno(ename, strlen(ename));
604 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n",
609 err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
612 P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
619 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);
623 static struct p9_req_t *
624 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...);
627 * p9_client_flush - flush (cancel) a request
629 * @oldreq: request to cancel
631 * This sents a flush for a particular request and links
632 * the flush request to the original request. The current
633 * code only supports a single flush request although the protocol
634 * allows for multiple flush requests to be sent for a single request.
638 static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
640 struct p9_req_t *req;
644 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1);
648 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag);
650 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag);
655 /* if we haven't received a response for oldreq,
656 remove it from the list. */
658 if (oldreq->status == REQ_STATUS_FLSH)
659 list_del(&oldreq->req_list);
660 spin_unlock(&c->lock);
666 static struct p9_req_t *p9_client_prepare_req(struct p9_client *c,
667 int8_t type, int req_size,
668 const char *fmt, va_list ap)
671 struct p9_req_t *req;
673 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type);
675 /* we allow for any status other than disconnected */
676 if (c->status == Disconnected)
677 return ERR_PTR(-EIO);
679 /* if status is begin_disconnected we allow only clunk request */
680 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK))
681 return ERR_PTR(-EIO);
684 if (type != P9_TVERSION) {
685 tag = p9_idpool_get(c->tagpool);
687 return ERR_PTR(-ENOMEM);
690 req = p9_tag_alloc(c, tag, req_size);
694 /* marshall the data */
695 p9pdu_prepare(req->tc, tag, type);
696 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
699 p9pdu_finalize(c, req->tc);
700 trace_9p_client_req(c, type, tag);
708 * p9_client_rpc - issue a request and wait for a response
710 * @type: type of request
711 * @fmt: protocol format string (see protocol.c)
713 * Returns request structure (which client must free using p9_free_req)
716 static struct p9_req_t *
717 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
722 struct p9_req_t *req;
725 req = p9_client_prepare_req(c, type, c->msize, fmt, ap);
730 if (signal_pending(current)) {
732 clear_thread_flag(TIF_SIGPENDING);
736 err = c->trans_mod->request(c, req);
738 if (err != -ERESTARTSYS && err != -EFAULT)
739 c->status = Disconnected;
742 /* Wait for the response */
743 err = wait_event_interruptible(*req->wq,
744 req->status >= REQ_STATUS_RCVD);
746 if (req->status == REQ_STATUS_ERROR) {
747 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
750 if ((err == -ERESTARTSYS) && (c->status == Connected)) {
751 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
753 clear_thread_flag(TIF_SIGPENDING);
755 if (c->trans_mod->cancel(c, req))
756 p9_client_flush(c, req);
758 /* if we received the response anyway, don't signal error */
759 if (req->status == REQ_STATUS_RCVD)
763 spin_lock_irqsave(¤t->sighand->siglock, flags);
765 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
770 err = p9_check_errors(c, req);
771 trace_9p_client_res(c, type, req->rc->tag, err);
780 * p9_client_zc_rpc - issue a request and wait for a response
782 * @type: type of request
783 * @uidata: user bffer that should be ued for zero copy read
784 * @uodata: user buffer that shoud be user for zero copy write
785 * @inlen: read buffer size
786 * @olen: write buffer size
787 * @hdrlen: reader header size, This is the size of response protocol data
788 * @fmt: protocol format string (see protocol.c)
790 * Returns request structure (which client must free using p9_free_req)
792 static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
793 char *uidata, char *uodata,
794 int inlen, int olen, int in_hdrlen,
795 int kern_buf, const char *fmt, ...)
800 struct p9_req_t *req;
804 * We allocate a inline protocol data of only 4k bytes.
805 * The actual content is passed in zero-copy fashion.
807 req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap);
812 if (signal_pending(current)) {
814 clear_thread_flag(TIF_SIGPENDING);
818 /* If we are called with KERNEL_DS force kern_buf */
819 if (segment_eq(get_fs(), KERNEL_DS))
822 err = c->trans_mod->zc_request(c, req, uidata, uodata,
823 inlen, olen, in_hdrlen, kern_buf);
826 c->status = Disconnected;
827 if (err != -ERESTARTSYS)
830 if (req->status == REQ_STATUS_ERROR) {
831 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
834 if ((err == -ERESTARTSYS) && (c->status == Connected)) {
835 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n");
837 clear_thread_flag(TIF_SIGPENDING);
839 if (c->trans_mod->cancel(c, req))
840 p9_client_flush(c, req);
842 /* if we received the response anyway, don't signal error */
843 if (req->status == REQ_STATUS_RCVD)
847 spin_lock_irqsave(¤t->sighand->siglock, flags);
849 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
854 err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf);
855 trace_9p_client_res(c, type, req->rc->tag, err);
863 static struct p9_fid *p9_fid_create(struct p9_client *clnt)
869 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt);
870 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
872 return ERR_PTR(-ENOMEM);
874 ret = p9_idpool_get(clnt->fidpool);
881 memset(&fid->qid, 0, sizeof(struct p9_qid));
883 fid->uid = current_fsuid();
886 spin_lock_irqsave(&clnt->lock, flags);
887 list_add(&fid->flist, &clnt->fidlist);
888 spin_unlock_irqrestore(&clnt->lock, flags);
897 static void p9_fid_destroy(struct p9_fid *fid)
899 struct p9_client *clnt;
902 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid);
904 p9_idpool_put(fid->fid, clnt->fidpool);
905 spin_lock_irqsave(&clnt->lock, flags);
906 list_del(&fid->flist);
907 spin_unlock_irqrestore(&clnt->lock, flags);
912 static int p9_client_version(struct p9_client *c)
915 struct p9_req_t *req;
919 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",
920 c->msize, c->proto_version);
922 switch (c->proto_version) {
924 req = p9_client_rpc(c, P9_TVERSION, "ds",
925 c->msize, "9P2000.L");
928 req = p9_client_rpc(c, P9_TVERSION, "ds",
929 c->msize, "9P2000.u");
931 case p9_proto_legacy:
932 req = p9_client_rpc(c, P9_TVERSION, "ds",
943 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
945 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
946 trace_9p_protocol_dump(c, req->rc);
950 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version);
951 if (!strncmp(version, "9P2000.L", 8))
952 c->proto_version = p9_proto_2000L;
953 else if (!strncmp(version, "9P2000.u", 8))
954 c->proto_version = p9_proto_2000u;
955 else if (!strncmp(version, "9P2000", 6))
956 c->proto_version = p9_proto_legacy;
962 if (msize < c->msize)
972 struct p9_client *p9_client_create(const char *dev_name, char *options)
975 struct p9_client *clnt;
978 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
980 return ERR_PTR(-ENOMEM);
982 clnt->trans_mod = NULL;
984 spin_lock_init(&clnt->lock);
985 INIT_LIST_HEAD(&clnt->fidlist);
987 err = p9_tag_init(clnt);
991 err = parse_opts(options, clnt);
993 goto destroy_tagpool;
995 if (!clnt->trans_mod)
996 clnt->trans_mod = v9fs_get_default_trans();
998 if (clnt->trans_mod == NULL) {
999 err = -EPROTONOSUPPORT;
1000 P9_DPRINTK(P9_DEBUG_ERROR,
1001 "No transport defined or default transport\n");
1002 goto destroy_tagpool;
1005 clnt->fidpool = p9_idpool_create();
1006 if (IS_ERR(clnt->fidpool)) {
1007 err = PTR_ERR(clnt->fidpool);
1011 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n",
1012 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version);
1014 err = clnt->trans_mod->create(clnt, dev_name, options);
1016 goto destroy_fidpool;
1018 if (clnt->msize > clnt->trans_mod->maxsize)
1019 clnt->msize = clnt->trans_mod->maxsize;
1021 err = p9_client_version(clnt);
1028 clnt->trans_mod->close(clnt);
1030 p9_idpool_destroy(clnt->fidpool);
1032 v9fs_put_trans(clnt->trans_mod);
1034 p9_idpool_destroy(clnt->tagpool);
1037 return ERR_PTR(err);
1039 EXPORT_SYMBOL(p9_client_create);
1041 void p9_client_destroy(struct p9_client *clnt)
1043 struct p9_fid *fid, *fidptr;
1045 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt);
1047 if (clnt->trans_mod)
1048 clnt->trans_mod->close(clnt);
1050 v9fs_put_trans(clnt->trans_mod);
1052 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) {
1053 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid);
1054 p9_fid_destroy(fid);
1058 p9_idpool_destroy(clnt->fidpool);
1060 p9_tag_cleanup(clnt);
1064 EXPORT_SYMBOL(p9_client_destroy);
1066 void p9_client_disconnect(struct p9_client *clnt)
1068 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
1069 clnt->status = Disconnected;
1071 EXPORT_SYMBOL(p9_client_disconnect);
1073 void p9_client_begin_disconnect(struct p9_client *clnt)
1075 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
1076 clnt->status = BeginDisconnect;
1078 EXPORT_SYMBOL(p9_client_begin_disconnect);
1080 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
1081 char *uname, u32 n_uname, char *aname)
1084 struct p9_req_t *req;
1089 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
1090 afid ? afid->fid : -1, uname, aname);
1091 fid = p9_fid_create(clnt);
1098 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid,
1099 afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
1105 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
1107 trace_9p_protocol_dump(clnt, req->rc);
1108 p9_free_req(clnt, req);
1112 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n",
1114 (unsigned long long)qid.path,
1117 memmove(&fid->qid, &qid, sizeof(struct p9_qid));
1119 p9_free_req(clnt, req);
1124 p9_fid_destroy(fid);
1125 return ERR_PTR(err);
1127 EXPORT_SYMBOL(p9_client_attach);
1129 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,
1130 char **wnames, int clone)
1133 struct p9_client *clnt;
1135 struct p9_qid *wqids;
1136 struct p9_req_t *req;
1137 uint16_t nwqids, count;
1141 clnt = oldfid->clnt;
1143 fid = p9_fid_create(clnt);
1150 fid->uid = oldfid->uid;
1155 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n",
1156 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL);
1158 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid,
1165 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
1167 trace_9p_protocol_dump(clnt, req->rc);
1168 p9_free_req(clnt, req);
1171 p9_free_req(clnt, req);
1173 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids);
1175 if (nwqids != nwname) {
1180 for (count = 0; count < nwqids; count++)
1181 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n",
1182 count, wqids[count].type,
1183 (unsigned long long)wqids[count].path,
1184 wqids[count].version);
1187 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid));
1189 fid->qid = oldfid->qid;
1196 p9_client_clunk(fid);
1200 if (fid && (fid != oldfid))
1201 p9_fid_destroy(fid);
1203 return ERR_PTR(err);
1205 EXPORT_SYMBOL(p9_client_walk);
1207 int p9_client_open(struct p9_fid *fid, int mode)
1210 struct p9_client *clnt;
1211 struct p9_req_t *req;
1216 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
1217 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
1220 if (fid->mode != -1)
1223 if (p9_is_proto_dotl(clnt))
1224 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
1226 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
1232 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1234 trace_9p_protocol_dump(clnt, req->rc);
1235 goto free_and_error;
1238 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
1239 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type,
1240 (unsigned long long)qid.path, qid.version, iounit);
1243 fid->iounit = iounit;
1246 p9_free_req(clnt, req);
1250 EXPORT_SYMBOL(p9_client_open);
1252 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
1253 gid_t gid, struct p9_qid *qid)
1256 struct p9_client *clnt;
1257 struct p9_req_t *req;
1260 P9_DPRINTK(P9_DEBUG_9P,
1261 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n",
1262 ofid->fid, name, flags, mode, gid);
1265 if (ofid->mode != -1)
1268 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags,
1275 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
1277 trace_9p_protocol_dump(clnt, req->rc);
1278 goto free_and_error;
1281 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n",
1283 (unsigned long long)qid->path,
1284 qid->version, iounit);
1287 ofid->iounit = iounit;
1290 p9_free_req(clnt, req);
1294 EXPORT_SYMBOL(p9_client_create_dotl);
1296 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
1300 struct p9_client *clnt;
1301 struct p9_req_t *req;
1305 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1306 fid->fid, name, perm, mode);
1310 if (fid->mode != -1)
1313 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm,
1320 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
1322 trace_9p_protocol_dump(clnt, req->rc);
1323 goto free_and_error;
1326 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1328 (unsigned long long)qid.path,
1329 qid.version, iounit);
1332 fid->iounit = iounit;
1335 p9_free_req(clnt, req);
1339 EXPORT_SYMBOL(p9_client_fcreate);
1341 int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,
1345 struct p9_client *clnt;
1346 struct p9_req_t *req;
1348 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n",
1349 dfid->fid, name, symtgt);
1352 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt,
1359 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
1361 trace_9p_protocol_dump(clnt, req->rc);
1362 goto free_and_error;
1365 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n",
1366 qid->type, (unsigned long long)qid->path, qid->version);
1369 p9_free_req(clnt, req);
1373 EXPORT_SYMBOL(p9_client_symlink);
1375 int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
1377 struct p9_client *clnt;
1378 struct p9_req_t *req;
1380 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
1381 dfid->fid, oldfid->fid, newname);
1383 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
1386 return PTR_ERR(req);
1388 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
1389 p9_free_req(clnt, req);
1392 EXPORT_SYMBOL(p9_client_link);
1394 int p9_client_fsync(struct p9_fid *fid, int datasync)
1397 struct p9_client *clnt;
1398 struct p9_req_t *req;
1400 P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n",
1401 fid->fid, datasync);
1405 req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync);
1411 P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid);
1413 p9_free_req(clnt, req);
1418 EXPORT_SYMBOL(p9_client_fsync);
1420 int p9_client_clunk(struct p9_fid *fid)
1423 struct p9_client *clnt;
1424 struct p9_req_t *req;
1427 P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n");
1432 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
1436 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid);
1442 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid);
1444 p9_free_req(clnt, req);
1447 * Fid is not valid even after a failed clunk
1449 p9_fid_destroy(fid);
1452 EXPORT_SYMBOL(p9_client_clunk);
1454 int p9_client_remove(struct p9_fid *fid)
1457 struct p9_client *clnt;
1458 struct p9_req_t *req;
1460 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid);
1464 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid);
1470 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid);
1472 p9_free_req(clnt, req);
1474 p9_fid_destroy(fid);
1477 EXPORT_SYMBOL(p9_client_remove);
1479 int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags)
1482 struct p9_req_t *req;
1483 struct p9_client *clnt;
1485 P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n",
1486 dfid->fid, name, flags);
1489 req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags);
1494 P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name);
1496 p9_free_req(clnt, req);
1500 EXPORT_SYMBOL(p9_client_unlinkat);
1503 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
1508 struct p9_req_t *req;
1509 struct p9_client *clnt;
1510 int err, rsize, non_zc = 0;
1513 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n",
1514 fid->fid, (long long unsigned) offset, count);
1518 rsize = fid->iounit;
1519 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1520 rsize = clnt->msize - P9_IOHDRSZ;
1525 /* Don't bother zerocopy for small IO (< 1024) */
1526 if (clnt->trans_mod->zc_request && rsize > 1024) {
1532 indata = (char *)udata;
1534 * response header len is 11
1535 * PDU Header(7) + IO Size (4)
1537 req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0,
1538 11, kernel_buf, "dqd", fid->fid,
1542 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset,
1550 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
1552 trace_9p_protocol_dump(clnt, req->rc);
1553 goto free_and_error;
1556 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
1560 memmove(data, dataptr, count);
1562 err = copy_to_user(udata, dataptr, count);
1565 goto free_and_error;
1569 p9_free_req(clnt, req);
1573 p9_free_req(clnt, req);
1577 EXPORT_SYMBOL(p9_client_read);
1580 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
1581 u64 offset, u32 count)
1585 struct p9_client *clnt;
1586 struct p9_req_t *req;
1588 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n",
1589 fid->fid, (long long unsigned) offset, count);
1593 rsize = fid->iounit;
1594 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
1595 rsize = clnt->msize - P9_IOHDRSZ;
1600 /* Don't bother zerocopy for small IO (< 1024) */
1601 if (clnt->trans_mod->zc_request && rsize > 1024) {
1607 odata = (char *)udata;
1608 req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize,
1609 P9_ZC_HDR_SZ, kernel_buf, "dqd",
1610 fid->fid, offset, rsize);
1613 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid,
1614 offset, rsize, data);
1616 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid,
1617 offset, rsize, udata);
1624 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
1626 trace_9p_protocol_dump(clnt, req->rc);
1627 goto free_and_error;
1630 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count);
1632 p9_free_req(clnt, req);
1636 p9_free_req(clnt, req);
1640 EXPORT_SYMBOL(p9_client_write);
1642 struct p9_wstat *p9_client_stat(struct p9_fid *fid)
1645 struct p9_client *clnt;
1646 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL);
1647 struct p9_req_t *req;
1650 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid);
1653 return ERR_PTR(-ENOMEM);
1658 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid);
1664 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
1666 trace_9p_protocol_dump(clnt, req->rc);
1667 p9_free_req(clnt, req);
1671 P9_DPRINTK(P9_DEBUG_9P,
1672 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1673 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1674 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1675 "<<< uid=%d gid=%d n_muid=%d\n",
1676 ret->size, ret->type, ret->dev, ret->qid.type,
1677 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode,
1678 ret->atime, ret->mtime, (unsigned long long)ret->length,
1679 ret->name, ret->uid, ret->gid, ret->muid, ret->extension,
1680 ret->n_uid, ret->n_gid, ret->n_muid);
1682 p9_free_req(clnt, req);
1687 return ERR_PTR(err);
1689 EXPORT_SYMBOL(p9_client_stat);
1691 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
1695 struct p9_client *clnt;
1696 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl),
1698 struct p9_req_t *req;
1700 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n",
1701 fid->fid, request_mask);
1704 return ERR_PTR(-ENOMEM);
1709 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask);
1715 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
1717 trace_9p_protocol_dump(clnt, req->rc);
1718 p9_free_req(clnt, req);
1722 P9_DPRINTK(P9_DEBUG_9P,
1723 "<<< RGETATTR st_result_mask=%lld\n"
1724 "<<< qid=%x.%llx.%x\n"
1725 "<<< st_mode=%8.8x st_nlink=%llu\n"
1726 "<<< st_uid=%d st_gid=%d\n"
1727 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n"
1728 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n"
1729 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n"
1730 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n"
1731 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n"
1732 "<<< st_gen=%lld st_data_version=%lld",
1733 ret->st_result_mask, ret->qid.type, ret->qid.path,
1734 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid,
1735 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize,
1736 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec,
1737 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec,
1738 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec,
1739 ret->st_gen, ret->st_data_version);
1741 p9_free_req(clnt, req);
1746 return ERR_PTR(err);
1748 EXPORT_SYMBOL(p9_client_getattr_dotl);
1750 static int p9_client_statsize(struct p9_wstat *wst, int proto_version)
1754 /* NOTE: size shouldn't include its own length */
1755 /* size[2] type[2] dev[4] qid[13] */
1756 /* mode[4] atime[4] mtime[4] length[8]*/
1757 /* name[s] uid[s] gid[s] muid[s] */
1758 ret = 2+4+13+4+4+4+8+2+2+2+2;
1761 ret += strlen(wst->name);
1763 ret += strlen(wst->uid);
1765 ret += strlen(wst->gid);
1767 ret += strlen(wst->muid);
1769 if ((proto_version == p9_proto_2000u) ||
1770 (proto_version == p9_proto_2000L)) {
1771 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
1773 ret += strlen(wst->extension);
1779 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
1782 struct p9_req_t *req;
1783 struct p9_client *clnt;
1787 wst->size = p9_client_statsize(wst, clnt->proto_version);
1788 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
1789 P9_DPRINTK(P9_DEBUG_9P,
1790 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1791 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1792 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1793 " uid=%d gid=%d n_muid=%d\n",
1794 wst->size, wst->type, wst->dev, wst->qid.type,
1795 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode,
1796 wst->atime, wst->mtime, (unsigned long long)wst->length,
1797 wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
1798 wst->n_uid, wst->n_gid, wst->n_muid);
1800 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst);
1806 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid);
1808 p9_free_req(clnt, req);
1812 EXPORT_SYMBOL(p9_client_wstat);
1814 int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr)
1817 struct p9_req_t *req;
1818 struct p9_client *clnt;
1822 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid);
1823 P9_DPRINTK(P9_DEBUG_9P,
1824 " valid=%x mode=%x uid=%d gid=%d size=%lld\n"
1825 " atime_sec=%lld atime_nsec=%lld\n"
1826 " mtime_sec=%lld mtime_nsec=%lld\n",
1827 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid,
1828 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec,
1829 p9attr->mtime_sec, p9attr->mtime_nsec);
1831 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr);
1837 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid);
1838 p9_free_req(clnt, req);
1842 EXPORT_SYMBOL(p9_client_setattr);
1844 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
1847 struct p9_req_t *req;
1848 struct p9_client *clnt;
1853 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid);
1855 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid);
1861 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type,
1862 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
1863 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
1865 trace_9p_protocol_dump(clnt, req->rc);
1866 p9_free_req(clnt, req);
1870 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
1871 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
1872 "fsid %llu namelen %ld\n",
1873 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize,
1874 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree,
1875 sb->fsid, (long int)sb->namelen);
1877 p9_free_req(clnt, req);
1881 EXPORT_SYMBOL(p9_client_statfs);
1883 int p9_client_rename(struct p9_fid *fid,
1884 struct p9_fid *newdirfid, const char *name)
1887 struct p9_req_t *req;
1888 struct p9_client *clnt;
1893 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n",
1894 fid->fid, newdirfid->fid, name);
1896 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid,
1897 newdirfid->fid, name);
1903 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid);
1905 p9_free_req(clnt, req);
1909 EXPORT_SYMBOL(p9_client_rename);
1911 int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name,
1912 struct p9_fid *newdirfid, const char *new_name)
1915 struct p9_req_t *req;
1916 struct p9_client *clnt;
1919 clnt = olddirfid->clnt;
1921 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s"
1922 " newdirfid %d new name %s\n", olddirfid->fid, old_name,
1923 newdirfid->fid, new_name);
1925 req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid,
1926 old_name, newdirfid->fid, new_name);
1932 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n",
1933 newdirfid->fid, new_name);
1935 p9_free_req(clnt, req);
1939 EXPORT_SYMBOL(p9_client_renameat);
1942 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
1944 struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
1945 const char *attr_name, u64 *attr_size)
1948 struct p9_req_t *req;
1949 struct p9_client *clnt;
1950 struct p9_fid *attr_fid;
1953 clnt = file_fid->clnt;
1954 attr_fid = p9_fid_create(clnt);
1955 if (IS_ERR(attr_fid)) {
1956 err = PTR_ERR(attr_fid);
1960 P9_DPRINTK(P9_DEBUG_9P,
1961 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
1962 file_fid->fid, attr_fid->fid, attr_name);
1964 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",
1965 file_fid->fid, attr_fid->fid, attr_name);
1970 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
1972 trace_9p_protocol_dump(clnt, req->rc);
1973 p9_free_req(clnt, req);
1976 p9_free_req(clnt, req);
1977 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n",
1978 attr_fid->fid, *attr_size);
1981 p9_client_clunk(attr_fid);
1984 if (attr_fid && (attr_fid != file_fid))
1985 p9_fid_destroy(attr_fid);
1987 return ERR_PTR(err);
1989 EXPORT_SYMBOL_GPL(p9_client_xattrwalk);
1991 int p9_client_xattrcreate(struct p9_fid *fid, const char *name,
1992 u64 attr_size, int flags)
1995 struct p9_req_t *req;
1996 struct p9_client *clnt;
1998 P9_DPRINTK(P9_DEBUG_9P,
1999 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n",
2000 fid->fid, name, (long long)attr_size, flags);
2003 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd",
2004 fid->fid, name, attr_size, flags);
2009 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid);
2010 p9_free_req(clnt, req);
2014 EXPORT_SYMBOL_GPL(p9_client_xattrcreate);
2016 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
2018 int err, rsize, non_zc = 0;
2019 struct p9_client *clnt;
2020 struct p9_req_t *req;
2023 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n",
2024 fid->fid, (long long unsigned) offset, count);
2029 rsize = fid->iounit;
2030 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ)
2031 rsize = clnt->msize - P9_READDIRHDRSZ;
2036 /* Don't bother zerocopy for small IO (< 1024) */
2037 if (clnt->trans_mod->zc_request && rsize > 1024) {
2039 * response header len is 11
2040 * PDU Header(7) + IO Size (4)
2042 req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0,
2043 11, 1, "dqd", fid->fid, offset, rsize);
2046 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid,
2054 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
2056 trace_9p_protocol_dump(clnt, req->rc);
2057 goto free_and_error;
2059 if (rsize < count) {
2060 pr_err("bogus RREADDIR count (%d > %d)\n", count, rsize);
2064 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count);
2067 memmove(data, dataptr, count);
2069 p9_free_req(clnt, req);
2073 p9_free_req(clnt, req);
2077 EXPORT_SYMBOL(p9_client_readdir);
2079 int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,
2080 dev_t rdev, gid_t gid, struct p9_qid *qid)
2083 struct p9_client *clnt;
2084 struct p9_req_t *req;
2088 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d "
2089 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev));
2090 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode,
2091 MAJOR(rdev), MINOR(rdev), gid);
2093 return PTR_ERR(req);
2095 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
2097 trace_9p_protocol_dump(clnt, req->rc);
2100 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
2101 (unsigned long long)qid->path, qid->version);
2104 p9_free_req(clnt, req);
2108 EXPORT_SYMBOL(p9_client_mknod_dotl);
2110 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
2111 gid_t gid, struct p9_qid *qid)
2114 struct p9_client *clnt;
2115 struct p9_req_t *req;
2119 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n",
2120 fid->fid, name, mode, gid);
2121 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode,
2124 return PTR_ERR(req);
2126 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
2128 trace_9p_protocol_dump(clnt, req->rc);
2131 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
2132 (unsigned long long)qid->path, qid->version);
2135 p9_free_req(clnt, req);
2139 EXPORT_SYMBOL(p9_client_mkdir_dotl);
2141 int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status)
2144 struct p9_client *clnt;
2145 struct p9_req_t *req;
2149 P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d "
2150 "start %lld length %lld proc_id %d client_id %s\n",
2151 fid->fid, flock->type, flock->flags, flock->start,
2152 flock->length, flock->proc_id, flock->client_id);
2154 req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type,
2155 flock->flags, flock->start, flock->length,
2156 flock->proc_id, flock->client_id);
2159 return PTR_ERR(req);
2161 err = p9pdu_readf(req->rc, clnt->proto_version, "b", status);
2163 trace_9p_protocol_dump(clnt, req->rc);
2166 P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status);
2168 p9_free_req(clnt, req);
2172 EXPORT_SYMBOL(p9_client_lock_dotl);
2174 int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock)
2177 struct p9_client *clnt;
2178 struct p9_req_t *req;
2182 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld "
2183 "length %lld proc_id %d client_id %s\n", fid->fid, glock->type,
2184 glock->start, glock->length, glock->proc_id, glock->client_id);
2186 req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type,
2187 glock->start, glock->length, glock->proc_id, glock->client_id);
2190 return PTR_ERR(req);
2192 err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type,
2193 &glock->start, &glock->length, &glock->proc_id,
2196 trace_9p_protocol_dump(clnt, req->rc);
2199 P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld "
2200 "proc_id %d client_id %s\n", glock->type, glock->start,
2201 glock->length, glock->proc_id, glock->client_id);
2203 p9_free_req(clnt, req);
2206 EXPORT_SYMBOL(p9_client_getlock_dotl);
2208 int p9_client_readlink(struct p9_fid *fid, char **target)
2211 struct p9_client *clnt;
2212 struct p9_req_t *req;
2216 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid);
2218 req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid);
2220 return PTR_ERR(req);
2222 err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);
2224 trace_9p_protocol_dump(clnt, req->rc);
2227 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target);
2229 p9_free_req(clnt, req);
2232 EXPORT_SYMBOL(p9_client_readlink);