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
*
205 p9_tag_alloc(struct p9_client
*c
, u16 tag
, unsigned int max_size
)
209 struct p9_req_t
*req
;
210 int alloc_msize
= min(c
->msize
, max_size
);
212 /* This looks up the original request by tag so we know which
213 * buffer to read the data into */
216 if (tag
>= c
->max_tag
) {
217 spin_lock_irqsave(&c
->lock
, flags
);
218 /* check again since original check was outside of lock */
219 while (tag
>= c
->max_tag
) {
220 row
= (tag
/ P9_ROW_MAXTAG
);
221 c
->reqs
[row
] = kcalloc(P9_ROW_MAXTAG
,
222 sizeof(struct p9_req_t
), GFP_ATOMIC
);
225 printk(KERN_ERR
"Couldn't grow tag array\n");
226 spin_unlock_irqrestore(&c
->lock
, flags
);
227 return ERR_PTR(-ENOMEM
);
229 for (col
= 0; col
< P9_ROW_MAXTAG
; col
++) {
230 c
->reqs
[row
][col
].status
= REQ_STATUS_IDLE
;
231 c
->reqs
[row
][col
].tc
= NULL
;
233 c
->max_tag
+= P9_ROW_MAXTAG
;
235 spin_unlock_irqrestore(&c
->lock
, flags
);
237 row
= tag
/ P9_ROW_MAXTAG
;
238 col
= tag
% P9_ROW_MAXTAG
;
240 req
= &c
->reqs
[row
][col
];
242 req
->wq
= kmalloc(sizeof(wait_queue_head_t
), GFP_NOFS
);
244 printk(KERN_ERR
"Couldn't grow tag array\n");
245 return ERR_PTR(-ENOMEM
);
247 init_waitqueue_head(req
->wq
);
248 req
->tc
= kmalloc(sizeof(struct p9_fcall
) + alloc_msize
,
250 req
->rc
= kmalloc(sizeof(struct p9_fcall
) + alloc_msize
,
252 if ((!req
->tc
) || (!req
->rc
)) {
253 printk(KERN_ERR
"Couldn't grow tag array\n");
257 req
->tc
= req
->rc
= NULL
;
259 return ERR_PTR(-ENOMEM
);
261 req
->tc
->capacity
= alloc_msize
;
262 req
->rc
->capacity
= alloc_msize
;
263 req
->tc
->sdata
= (char *) req
->tc
+ sizeof(struct p9_fcall
);
264 req
->rc
->sdata
= (char *) req
->rc
+ sizeof(struct p9_fcall
);
267 p9pdu_reset(req
->tc
);
268 p9pdu_reset(req
->rc
);
270 req
->tc
->tag
= tag
-1;
271 req
->status
= REQ_STATUS_ALLOC
;
273 return &c
->reqs
[row
][col
];
277 * p9_tag_lookup - lookup a request by tag
278 * @c: client session to lookup tag within
279 * @tag: numeric id for transaction
283 struct p9_req_t
*p9_tag_lookup(struct p9_client
*c
, u16 tag
)
287 /* This looks up the original request by tag so we know which
288 * buffer to read the data into */
291 if(tag
>= c
->max_tag
)
294 row
= tag
/ P9_ROW_MAXTAG
;
295 col
= tag
% P9_ROW_MAXTAG
;
297 return &c
->reqs
[row
][col
];
299 EXPORT_SYMBOL(p9_tag_lookup
);
302 * p9_tag_init - setup tags structure and contents
303 * @c: v9fs client struct
305 * This initializes the tags structure for each client instance.
309 static int p9_tag_init(struct p9_client
*c
)
313 c
->tagpool
= p9_idpool_create();
314 if (IS_ERR(c
->tagpool
)) {
315 err
= PTR_ERR(c
->tagpool
);
318 err
= p9_idpool_get(c
->tagpool
); /* reserve tag 0 */
320 p9_idpool_destroy(c
->tagpool
);
329 * p9_tag_cleanup - cleans up tags structure and reclaims resources
330 * @c: v9fs client struct
332 * This frees resources associated with the tags structure
335 static void p9_tag_cleanup(struct p9_client
*c
)
339 /* check to insure all requests are idle */
340 for (row
= 0; row
< (c
->max_tag
/P9_ROW_MAXTAG
); row
++) {
341 for (col
= 0; col
< P9_ROW_MAXTAG
; col
++) {
342 if (c
->reqs
[row
][col
].status
!= REQ_STATUS_IDLE
) {
343 P9_DPRINTK(P9_DEBUG_MUX
,
344 "Attempting to cleanup non-free tag %d,%d\n",
346 /* TODO: delay execution of cleanup */
353 p9_idpool_put(0, c
->tagpool
); /* free reserved tag 0 */
354 p9_idpool_destroy(c
->tagpool
);
357 /* free requests associated with tags */
358 for (row
= 0; row
< (c
->max_tag
/P9_ROW_MAXTAG
); row
++) {
359 for (col
= 0; col
< P9_ROW_MAXTAG
; col
++) {
360 kfree(c
->reqs
[row
][col
].wq
);
361 kfree(c
->reqs
[row
][col
].tc
);
362 kfree(c
->reqs
[row
][col
].rc
);
370 * p9_free_req - free a request and clean-up as necessary
372 * r: request to release
376 static void p9_free_req(struct p9_client
*c
, struct p9_req_t
*r
)
378 int tag
= r
->tc
->tag
;
379 P9_DPRINTK(P9_DEBUG_MUX
, "clnt %p req %p tag: %d\n", c
, r
, tag
);
381 r
->status
= REQ_STATUS_IDLE
;
382 if (tag
!= P9_NOTAG
&& p9_idpool_check(tag
, c
->tagpool
))
383 p9_idpool_put(tag
, c
->tagpool
);
387 * p9_client_cb - call back from transport to client
389 * req: request received
392 void p9_client_cb(struct p9_client
*c
, struct p9_req_t
*req
)
394 P9_DPRINTK(P9_DEBUG_MUX
, " tag %d\n", req
->tc
->tag
);
396 P9_DPRINTK(P9_DEBUG_MUX
, "wakeup: %d\n", req
->tc
->tag
);
398 EXPORT_SYMBOL(p9_client_cb
);
401 * p9_parse_header - parse header arguments out of a packet
402 * @pdu: packet to parse
403 * @size: size of packet
404 * @type: type of request
405 * @tag: tag of packet
406 * @rewind: set if we need to rewind offset afterwards
410 p9_parse_header(struct p9_fcall
*pdu
, int32_t *size
, int8_t *type
, int16_t *tag
,
416 int offset
= pdu
->offset
;
423 err
= p9pdu_readf(pdu
, 0, "dbw", &r_size
, &r_type
, &r_tag
);
425 goto rewind_and_exit
;
431 P9_DPRINTK(P9_DEBUG_9P
, "<<< size=%d type: %d tag: %d\n", pdu
->size
,
444 pdu
->offset
= offset
;
447 EXPORT_SYMBOL(p9_parse_header
);
450 * p9_check_errors - check 9p packet for error return and process it
451 * @c: current client instance
452 * @req: request to parse and check for error conditions
454 * returns error code if one is discovered, otherwise returns 0
456 * this will have to be more complicated if we have multiple
460 static int p9_check_errors(struct p9_client
*c
, struct p9_req_t
*req
)
466 err
= p9_parse_header(req
->rc
, NULL
, &type
, NULL
, 0);
468 P9_DPRINTK(P9_DEBUG_ERROR
, "couldn't parse header %d\n", err
);
472 if (type
!= P9_RERROR
&& type
!= P9_RLERROR
)
475 if (!p9_is_proto_dotl(c
)) {
477 err
= p9pdu_readf(req
->rc
, c
->proto_version
, "s?d",
482 if (p9_is_proto_dotu(c
))
485 if (!err
|| !IS_ERR_VALUE(err
)) {
486 err
= p9_errstr2errno(ename
, strlen(ename
));
488 P9_DPRINTK(P9_DEBUG_9P
, "<<< RERROR (%d) %s\n",
493 err
= p9pdu_readf(req
->rc
, c
->proto_version
, "d", &ecode
);
496 P9_DPRINTK(P9_DEBUG_9P
, "<<< RLERROR (%d)\n", -ecode
);
502 P9_DPRINTK(P9_DEBUG_ERROR
, "couldn't parse error%d\n", err
);
508 * p9_check_zc_errors - check 9p packet for error return and process it
509 * @c: current client instance
510 * @req: request to parse and check for error conditions
511 * @in_hdrlen: Size of response protocol buffer.
513 * returns error code if one is discovered, otherwise returns 0
515 * this will have to be more complicated if we have multiple
519 static int p9_check_zc_errors(struct p9_client
*c
, struct p9_req_t
*req
,
520 char *uidata
, int in_hdrlen
, int kern_buf
)
527 err
= p9_parse_header(req
->rc
, NULL
, &type
, NULL
, 0);
529 P9_DPRINTK(P9_DEBUG_ERROR
, "couldn't parse header %d\n", err
);
533 if (type
!= P9_RERROR
&& type
!= P9_RLERROR
)
536 if (!p9_is_proto_dotl(c
)) {
537 /* Error is reported in string format */
539 /* 7 = header size for RERROR, 2 is the size of string len; */
540 int inline_len
= in_hdrlen
- (7 + 2);
542 /* Read the size of error string */
543 err
= p9pdu_readf(req
->rc
, c
->proto_version
, "w", &len
);
547 ename
= kmalloc(len
+ 1, GFP_NOFS
);
552 if (len
<= inline_len
) {
553 /* We have error in protocol buffer itself */
554 if (pdu_read(req
->rc
, ename
, len
)) {
561 * Part of the data is in user space buffer.
563 if (pdu_read(req
->rc
, ename
, inline_len
)) {
569 memcpy(ename
+ inline_len
, uidata
,
572 err
= copy_from_user(ename
+ inline_len
,
573 uidata
, len
- inline_len
);
581 if (p9_is_proto_dotu(c
)) {
582 /* For dotu we also have error code */
583 err
= p9pdu_readf(req
->rc
,
584 c
->proto_version
, "d", &ecode
);
589 if (!err
|| !IS_ERR_VALUE(err
)) {
590 err
= p9_errstr2errno(ename
, strlen(ename
));
592 P9_DPRINTK(P9_DEBUG_9P
, "<<< RERROR (%d) %s\n",
597 err
= p9pdu_readf(req
->rc
, c
->proto_version
, "d", &ecode
);
600 P9_DPRINTK(P9_DEBUG_9P
, "<<< RLERROR (%d)\n", -ecode
);
607 P9_DPRINTK(P9_DEBUG_ERROR
, "couldn't parse error%d\n", err
);
611 static struct p9_req_t
*
612 p9_client_rpc(struct p9_client
*c
, int8_t type
, const char *fmt
, ...);
615 * p9_client_flush - flush (cancel) a request
617 * @oldreq: request to cancel
619 * This sents a flush for a particular request and links
620 * the flush request to the original request. The current
621 * code only supports a single flush request although the protocol
622 * allows for multiple flush requests to be sent for a single request.
626 static int p9_client_flush(struct p9_client
*c
, struct p9_req_t
*oldreq
)
628 struct p9_req_t
*req
;
632 err
= p9_parse_header(oldreq
->tc
, NULL
, NULL
, &oldtag
, 1);
636 P9_DPRINTK(P9_DEBUG_9P
, ">>> TFLUSH tag %d\n", oldtag
);
638 req
= p9_client_rpc(c
, P9_TFLUSH
, "w", oldtag
);
643 /* if we haven't received a response for oldreq,
644 remove it from the list. */
646 if (oldreq
->status
== REQ_STATUS_FLSH
)
647 list_del(&oldreq
->req_list
);
648 spin_unlock(&c
->lock
);
654 static struct p9_req_t
*p9_client_prepare_req(struct p9_client
*c
,
655 int8_t type
, int req_size
,
656 const char *fmt
, va_list ap
)
659 struct p9_req_t
*req
;
661 P9_DPRINTK(P9_DEBUG_MUX
, "client %p op %d\n", c
, type
);
663 /* we allow for any status other than disconnected */
664 if (c
->status
== Disconnected
)
665 return ERR_PTR(-EIO
);
667 /* if status is begin_disconnected we allow only clunk request */
668 if ((c
->status
== BeginDisconnect
) && (type
!= P9_TCLUNK
))
669 return ERR_PTR(-EIO
);
672 if (type
!= P9_TVERSION
) {
673 tag
= p9_idpool_get(c
->tagpool
);
675 return ERR_PTR(-ENOMEM
);
678 req
= p9_tag_alloc(c
, tag
, req_size
);
682 /* marshall the data */
683 p9pdu_prepare(req
->tc
, tag
, type
);
684 err
= p9pdu_vwritef(req
->tc
, c
->proto_version
, fmt
, ap
);
687 p9pdu_finalize(req
->tc
);
695 * p9_client_rpc - issue a request and wait for a response
697 * @type: type of request
698 * @fmt: protocol format string (see protocol.c)
700 * Returns request structure (which client must free using p9_free_req)
703 static struct p9_req_t
*
704 p9_client_rpc(struct p9_client
*c
, int8_t type
, const char *fmt
, ...)
709 struct p9_req_t
*req
;
712 req
= p9_client_prepare_req(c
, type
, c
->msize
, fmt
, ap
);
717 if (signal_pending(current
)) {
719 clear_thread_flag(TIF_SIGPENDING
);
723 err
= c
->trans_mod
->request(c
, req
);
725 if (err
!= -ERESTARTSYS
&& err
!= -EFAULT
)
726 c
->status
= Disconnected
;
729 /* Wait for the response */
730 err
= wait_event_interruptible(*req
->wq
,
731 req
->status
>= REQ_STATUS_RCVD
);
733 if (req
->status
== REQ_STATUS_ERROR
) {
734 P9_DPRINTK(P9_DEBUG_ERROR
, "req_status error %d\n", req
->t_err
);
737 if ((err
== -ERESTARTSYS
) && (c
->status
== Connected
)) {
738 P9_DPRINTK(P9_DEBUG_MUX
, "flushing\n");
740 clear_thread_flag(TIF_SIGPENDING
);
742 if (c
->trans_mod
->cancel(c
, req
))
743 p9_client_flush(c
, req
);
745 /* if we received the response anyway, don't signal error */
746 if (req
->status
== REQ_STATUS_RCVD
)
750 spin_lock_irqsave(¤t
->sighand
->siglock
, flags
);
752 spin_unlock_irqrestore(¤t
->sighand
->siglock
, flags
);
757 err
= p9_check_errors(c
, req
);
759 P9_DPRINTK(P9_DEBUG_MUX
, "exit: client %p op %d\n", c
, type
);
763 P9_DPRINTK(P9_DEBUG_MUX
,
764 "exit: client %p op %d error: %d\n", c
, type
, err
);
770 * p9_client_zc_rpc - issue a request and wait for a response
772 * @type: type of request
773 * @uidata: user bffer that should be ued for zero copy read
774 * @uodata: user buffer that shoud be user for zero copy write
775 * @inlen: read buffer size
776 * @olen: write buffer size
777 * @hdrlen: reader header size, This is the size of response protocol data
778 * @fmt: protocol format string (see protocol.c)
780 * Returns request structure (which client must free using p9_free_req)
782 static struct p9_req_t
*p9_client_zc_rpc(struct p9_client
*c
, int8_t type
,
783 char *uidata
, char *uodata
,
784 int inlen
, int olen
, int in_hdrlen
,
785 int kern_buf
, const char *fmt
, ...)
790 struct p9_req_t
*req
;
794 * We allocate a inline protocol data of only 4k bytes.
795 * The actual content is passed in zero-copy fashion.
797 req
= p9_client_prepare_req(c
, type
, P9_ZC_HDR_SZ
, fmt
, ap
);
802 if (signal_pending(current
)) {
804 clear_thread_flag(TIF_SIGPENDING
);
808 /* If we are called with KERNEL_DS force kern_buf */
809 if (segment_eq(get_fs(), KERNEL_DS
))
812 err
= c
->trans_mod
->zc_request(c
, req
, uidata
, uodata
,
813 inlen
, olen
, in_hdrlen
, kern_buf
);
816 c
->status
= Disconnected
;
819 if (req
->status
== REQ_STATUS_ERROR
) {
820 P9_DPRINTK(P9_DEBUG_ERROR
, "req_status error %d\n", req
->t_err
);
823 if ((err
== -ERESTARTSYS
) && (c
->status
== Connected
)) {
824 P9_DPRINTK(P9_DEBUG_MUX
, "flushing\n");
826 clear_thread_flag(TIF_SIGPENDING
);
828 if (c
->trans_mod
->cancel(c
, req
))
829 p9_client_flush(c
, req
);
831 /* if we received the response anyway, don't signal error */
832 if (req
->status
== REQ_STATUS_RCVD
)
836 spin_lock_irqsave(¤t
->sighand
->siglock
, flags
);
838 spin_unlock_irqrestore(¤t
->sighand
->siglock
, flags
);
843 err
= p9_check_zc_errors(c
, req
, uidata
, in_hdrlen
, kern_buf
);
845 P9_DPRINTK(P9_DEBUG_MUX
, "exit: client %p op %d\n", c
, type
);
849 P9_DPRINTK(P9_DEBUG_MUX
, "exit: client %p op %d error: %d\n", c
, type
,
855 static struct p9_fid
*p9_fid_create(struct p9_client
*clnt
)
861 P9_DPRINTK(P9_DEBUG_FID
, "clnt %p\n", clnt
);
862 fid
= kmalloc(sizeof(struct p9_fid
), GFP_KERNEL
);
864 return ERR_PTR(-ENOMEM
);
866 ret
= p9_idpool_get(clnt
->fidpool
);
873 memset(&fid
->qid
, 0, sizeof(struct p9_qid
));
875 fid
->uid
= current_fsuid();
878 spin_lock_irqsave(&clnt
->lock
, flags
);
879 list_add(&fid
->flist
, &clnt
->fidlist
);
880 spin_unlock_irqrestore(&clnt
->lock
, flags
);
889 static void p9_fid_destroy(struct p9_fid
*fid
)
891 struct p9_client
*clnt
;
894 P9_DPRINTK(P9_DEBUG_FID
, "fid %d\n", fid
->fid
);
896 p9_idpool_put(fid
->fid
, clnt
->fidpool
);
897 spin_lock_irqsave(&clnt
->lock
, flags
);
898 list_del(&fid
->flist
);
899 spin_unlock_irqrestore(&clnt
->lock
, flags
);
904 static int p9_client_version(struct p9_client
*c
)
907 struct p9_req_t
*req
;
911 P9_DPRINTK(P9_DEBUG_9P
, ">>> TVERSION msize %d protocol %d\n",
912 c
->msize
, c
->proto_version
);
914 switch (c
->proto_version
) {
916 req
= p9_client_rpc(c
, P9_TVERSION
, "ds",
917 c
->msize
, "9P2000.L");
920 req
= p9_client_rpc(c
, P9_TVERSION
, "ds",
921 c
->msize
, "9P2000.u");
923 case p9_proto_legacy
:
924 req
= p9_client_rpc(c
, P9_TVERSION
, "ds",
935 err
= p9pdu_readf(req
->rc
, c
->proto_version
, "ds", &msize
, &version
);
937 P9_DPRINTK(P9_DEBUG_9P
, "version error %d\n", err
);
938 P9_DUMP_PKT(1, req
->rc
);
942 P9_DPRINTK(P9_DEBUG_9P
, "<<< RVERSION msize %d %s\n", msize
, version
);
943 if (!strncmp(version
, "9P2000.L", 8))
944 c
->proto_version
= p9_proto_2000L
;
945 else if (!strncmp(version
, "9P2000.u", 8))
946 c
->proto_version
= p9_proto_2000u
;
947 else if (!strncmp(version
, "9P2000", 6))
948 c
->proto_version
= p9_proto_legacy
;
954 if (msize
< c
->msize
)
964 struct p9_client
*p9_client_create(const char *dev_name
, char *options
)
967 struct p9_client
*clnt
;
970 clnt
= kmalloc(sizeof(struct p9_client
), GFP_KERNEL
);
972 return ERR_PTR(-ENOMEM
);
974 clnt
->trans_mod
= NULL
;
976 spin_lock_init(&clnt
->lock
);
977 INIT_LIST_HEAD(&clnt
->fidlist
);
979 err
= p9_tag_init(clnt
);
983 err
= parse_opts(options
, clnt
);
985 goto destroy_tagpool
;
987 if (!clnt
->trans_mod
)
988 clnt
->trans_mod
= v9fs_get_default_trans();
990 if (clnt
->trans_mod
== NULL
) {
991 err
= -EPROTONOSUPPORT
;
992 P9_DPRINTK(P9_DEBUG_ERROR
,
993 "No transport defined or default transport\n");
994 goto destroy_tagpool
;
997 clnt
->fidpool
= p9_idpool_create();
998 if (IS_ERR(clnt
->fidpool
)) {
999 err
= PTR_ERR(clnt
->fidpool
);
1003 P9_DPRINTK(P9_DEBUG_MUX
, "clnt %p trans %p msize %d protocol %d\n",
1004 clnt
, clnt
->trans_mod
, clnt
->msize
, clnt
->proto_version
);
1006 err
= clnt
->trans_mod
->create(clnt
, dev_name
, options
);
1008 goto destroy_fidpool
;
1010 if (clnt
->msize
> clnt
->trans_mod
->maxsize
)
1011 clnt
->msize
= clnt
->trans_mod
->maxsize
;
1013 err
= p9_client_version(clnt
);
1020 clnt
->trans_mod
->close(clnt
);
1022 p9_idpool_destroy(clnt
->fidpool
);
1024 v9fs_put_trans(clnt
->trans_mod
);
1026 p9_idpool_destroy(clnt
->tagpool
);
1029 return ERR_PTR(err
);
1031 EXPORT_SYMBOL(p9_client_create
);
1033 void p9_client_destroy(struct p9_client
*clnt
)
1035 struct p9_fid
*fid
, *fidptr
;
1037 P9_DPRINTK(P9_DEBUG_MUX
, "clnt %p\n", clnt
);
1039 if (clnt
->trans_mod
)
1040 clnt
->trans_mod
->close(clnt
);
1042 v9fs_put_trans(clnt
->trans_mod
);
1044 list_for_each_entry_safe(fid
, fidptr
, &clnt
->fidlist
, flist
) {
1045 printk(KERN_INFO
"Found fid %d not clunked\n", fid
->fid
);
1046 p9_fid_destroy(fid
);
1050 p9_idpool_destroy(clnt
->fidpool
);
1052 p9_tag_cleanup(clnt
);
1056 EXPORT_SYMBOL(p9_client_destroy
);
1058 void p9_client_disconnect(struct p9_client
*clnt
)
1060 P9_DPRINTK(P9_DEBUG_9P
, "clnt %p\n", clnt
);
1061 clnt
->status
= Disconnected
;
1063 EXPORT_SYMBOL(p9_client_disconnect
);
1065 void p9_client_begin_disconnect(struct p9_client
*clnt
)
1067 P9_DPRINTK(P9_DEBUG_9P
, "clnt %p\n", clnt
);
1068 clnt
->status
= BeginDisconnect
;
1070 EXPORT_SYMBOL(p9_client_begin_disconnect
);
1072 struct p9_fid
*p9_client_attach(struct p9_client
*clnt
, struct p9_fid
*afid
,
1073 char *uname
, u32 n_uname
, char *aname
)
1076 struct p9_req_t
*req
;
1080 P9_DPRINTK(P9_DEBUG_9P
, ">>> TATTACH afid %d uname %s aname %s\n",
1081 afid
? afid
->fid
: -1, uname
, aname
);
1084 fid
= p9_fid_create(clnt
);
1091 req
= p9_client_rpc(clnt
, P9_TATTACH
, "ddss?d", fid
->fid
,
1092 afid
? afid
->fid
: P9_NOFID
, uname
, aname
, n_uname
);
1098 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Q", &qid
);
1100 P9_DUMP_PKT(1, req
->rc
);
1101 p9_free_req(clnt
, req
);
1105 P9_DPRINTK(P9_DEBUG_9P
, "<<< RATTACH qid %x.%llx.%x\n",
1107 (unsigned long long)qid
.path
,
1110 memmove(&fid
->qid
, &qid
, sizeof(struct p9_qid
));
1112 p9_free_req(clnt
, req
);
1117 p9_fid_destroy(fid
);
1118 return ERR_PTR(err
);
1120 EXPORT_SYMBOL(p9_client_attach
);
1122 struct p9_fid
*p9_client_walk(struct p9_fid
*oldfid
, uint16_t nwname
,
1123 char **wnames
, int clone
)
1126 struct p9_client
*clnt
;
1128 struct p9_qid
*wqids
;
1129 struct p9_req_t
*req
;
1130 uint16_t nwqids
, count
;
1134 clnt
= oldfid
->clnt
;
1136 fid
= p9_fid_create(clnt
);
1143 fid
->uid
= oldfid
->uid
;
1148 P9_DPRINTK(P9_DEBUG_9P
, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n",
1149 oldfid
->fid
, fid
->fid
, nwname
, wnames
? wnames
[0] : NULL
);
1151 req
= p9_client_rpc(clnt
, P9_TWALK
, "ddT", oldfid
->fid
, fid
->fid
,
1158 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "R", &nwqids
, &wqids
);
1160 P9_DUMP_PKT(1, req
->rc
);
1161 p9_free_req(clnt
, req
);
1164 p9_free_req(clnt
, req
);
1166 P9_DPRINTK(P9_DEBUG_9P
, "<<< RWALK nwqid %d:\n", nwqids
);
1168 if (nwqids
!= nwname
) {
1173 for (count
= 0; count
< nwqids
; count
++)
1174 P9_DPRINTK(P9_DEBUG_9P
, "<<< [%d] %x.%llx.%x\n",
1175 count
, wqids
[count
].type
,
1176 (unsigned long long)wqids
[count
].path
,
1177 wqids
[count
].version
);
1180 memmove(&fid
->qid
, &wqids
[nwqids
- 1], sizeof(struct p9_qid
));
1182 fid
->qid
= oldfid
->qid
;
1189 p9_client_clunk(fid
);
1193 if (fid
&& (fid
!= oldfid
))
1194 p9_fid_destroy(fid
);
1196 return ERR_PTR(err
);
1198 EXPORT_SYMBOL(p9_client_walk
);
1200 int p9_client_open(struct p9_fid
*fid
, int mode
)
1203 struct p9_client
*clnt
;
1204 struct p9_req_t
*req
;
1209 P9_DPRINTK(P9_DEBUG_9P
, ">>> %s fid %d mode %d\n",
1210 p9_is_proto_dotl(clnt
) ? "TLOPEN" : "TOPEN", fid
->fid
, mode
);
1213 if (fid
->mode
!= -1)
1216 if (p9_is_proto_dotl(clnt
))
1217 req
= p9_client_rpc(clnt
, P9_TLOPEN
, "dd", fid
->fid
, mode
);
1219 req
= p9_client_rpc(clnt
, P9_TOPEN
, "db", fid
->fid
, mode
);
1225 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Qd", &qid
, &iounit
);
1227 P9_DUMP_PKT(1, req
->rc
);
1228 goto free_and_error
;
1231 P9_DPRINTK(P9_DEBUG_9P
, "<<< %s qid %x.%llx.%x iounit %x\n",
1232 p9_is_proto_dotl(clnt
) ? "RLOPEN" : "ROPEN", qid
.type
,
1233 (unsigned long long)qid
.path
, qid
.version
, iounit
);
1236 fid
->iounit
= iounit
;
1239 p9_free_req(clnt
, req
);
1243 EXPORT_SYMBOL(p9_client_open
);
1245 int p9_client_create_dotl(struct p9_fid
*ofid
, char *name
, u32 flags
, u32 mode
,
1246 gid_t gid
, struct p9_qid
*qid
)
1249 struct p9_client
*clnt
;
1250 struct p9_req_t
*req
;
1253 P9_DPRINTK(P9_DEBUG_9P
,
1254 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n",
1255 ofid
->fid
, name
, flags
, mode
, gid
);
1258 if (ofid
->mode
!= -1)
1261 req
= p9_client_rpc(clnt
, P9_TLCREATE
, "dsddd", ofid
->fid
, name
, flags
,
1268 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Qd", qid
, &iounit
);
1270 P9_DUMP_PKT(1, req
->rc
);
1271 goto free_and_error
;
1274 P9_DPRINTK(P9_DEBUG_9P
, "<<< RLCREATE qid %x.%llx.%x iounit %x\n",
1276 (unsigned long long)qid
->path
,
1277 qid
->version
, iounit
);
1280 ofid
->iounit
= iounit
;
1283 p9_free_req(clnt
, req
);
1287 EXPORT_SYMBOL(p9_client_create_dotl
);
1289 int p9_client_fcreate(struct p9_fid
*fid
, char *name
, u32 perm
, int mode
,
1293 struct p9_client
*clnt
;
1294 struct p9_req_t
*req
;
1298 P9_DPRINTK(P9_DEBUG_9P
, ">>> TCREATE fid %d name %s perm %d mode %d\n",
1299 fid
->fid
, name
, perm
, mode
);
1303 if (fid
->mode
!= -1)
1306 req
= p9_client_rpc(clnt
, P9_TCREATE
, "dsdb?s", fid
->fid
, name
, perm
,
1313 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Qd", &qid
, &iounit
);
1315 P9_DUMP_PKT(1, req
->rc
);
1316 goto free_and_error
;
1319 P9_DPRINTK(P9_DEBUG_9P
, "<<< RCREATE qid %x.%llx.%x iounit %x\n",
1321 (unsigned long long)qid
.path
,
1322 qid
.version
, iounit
);
1325 fid
->iounit
= iounit
;
1328 p9_free_req(clnt
, req
);
1332 EXPORT_SYMBOL(p9_client_fcreate
);
1334 int p9_client_symlink(struct p9_fid
*dfid
, char *name
, char *symtgt
, gid_t gid
,
1338 struct p9_client
*clnt
;
1339 struct p9_req_t
*req
;
1341 P9_DPRINTK(P9_DEBUG_9P
, ">>> TSYMLINK dfid %d name %s symtgt %s\n",
1342 dfid
->fid
, name
, symtgt
);
1345 req
= p9_client_rpc(clnt
, P9_TSYMLINK
, "dssd", dfid
->fid
, name
, symtgt
,
1352 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Q", qid
);
1354 P9_DUMP_PKT(1, req
->rc
);
1355 goto free_and_error
;
1358 P9_DPRINTK(P9_DEBUG_9P
, "<<< RSYMLINK qid %x.%llx.%x\n",
1359 qid
->type
, (unsigned long long)qid
->path
, qid
->version
);
1362 p9_free_req(clnt
, req
);
1366 EXPORT_SYMBOL(p9_client_symlink
);
1368 int p9_client_link(struct p9_fid
*dfid
, struct p9_fid
*oldfid
, char *newname
)
1370 struct p9_client
*clnt
;
1371 struct p9_req_t
*req
;
1373 P9_DPRINTK(P9_DEBUG_9P
, ">>> TLINK dfid %d oldfid %d newname %s\n",
1374 dfid
->fid
, oldfid
->fid
, newname
);
1376 req
= p9_client_rpc(clnt
, P9_TLINK
, "dds", dfid
->fid
, oldfid
->fid
,
1379 return PTR_ERR(req
);
1381 P9_DPRINTK(P9_DEBUG_9P
, "<<< RLINK\n");
1382 p9_free_req(clnt
, req
);
1385 EXPORT_SYMBOL(p9_client_link
);
1387 int p9_client_fsync(struct p9_fid
*fid
, int datasync
)
1390 struct p9_client
*clnt
;
1391 struct p9_req_t
*req
;
1393 P9_DPRINTK(P9_DEBUG_9P
, ">>> TFSYNC fid %d datasync:%d\n",
1394 fid
->fid
, datasync
);
1398 req
= p9_client_rpc(clnt
, P9_TFSYNC
, "dd", fid
->fid
, datasync
);
1404 P9_DPRINTK(P9_DEBUG_9P
, "<<< RFSYNC fid %d\n", fid
->fid
);
1406 p9_free_req(clnt
, req
);
1411 EXPORT_SYMBOL(p9_client_fsync
);
1413 int p9_client_clunk(struct p9_fid
*fid
)
1416 struct p9_client
*clnt
;
1417 struct p9_req_t
*req
;
1420 P9_EPRINTK(KERN_WARNING
, "Trying to clunk with NULL fid\n");
1425 P9_DPRINTK(P9_DEBUG_9P
, ">>> TCLUNK fid %d\n", fid
->fid
);
1429 req
= p9_client_rpc(clnt
, P9_TCLUNK
, "d", fid
->fid
);
1435 P9_DPRINTK(P9_DEBUG_9P
, "<<< RCLUNK fid %d\n", fid
->fid
);
1437 p9_free_req(clnt
, req
);
1440 * Fid is not valid even after a failed clunk
1442 p9_fid_destroy(fid
);
1445 EXPORT_SYMBOL(p9_client_clunk
);
1447 int p9_client_remove(struct p9_fid
*fid
)
1450 struct p9_client
*clnt
;
1451 struct p9_req_t
*req
;
1453 P9_DPRINTK(P9_DEBUG_9P
, ">>> TREMOVE fid %d\n", fid
->fid
);
1457 req
= p9_client_rpc(clnt
, P9_TREMOVE
, "d", fid
->fid
);
1463 P9_DPRINTK(P9_DEBUG_9P
, "<<< RREMOVE fid %d\n", fid
->fid
);
1465 p9_free_req(clnt
, req
);
1467 p9_fid_destroy(fid
);
1470 EXPORT_SYMBOL(p9_client_remove
);
1472 int p9_client_unlinkat(struct p9_fid
*dfid
, const char *name
, int flags
)
1475 struct p9_req_t
*req
;
1476 struct p9_client
*clnt
;
1478 P9_DPRINTK(P9_DEBUG_9P
, ">>> TUNLINKAT fid %d %s %d\n",
1479 dfid
->fid
, name
, flags
);
1482 req
= p9_client_rpc(clnt
, P9_TUNLINKAT
, "dsd", dfid
->fid
, name
, flags
);
1487 P9_DPRINTK(P9_DEBUG_9P
, "<<< RUNLINKAT fid %d %s\n", dfid
->fid
, name
);
1489 p9_free_req(clnt
, req
);
1493 EXPORT_SYMBOL(p9_client_unlinkat
);
1496 p9_client_read(struct p9_fid
*fid
, char *data
, char __user
*udata
, u64 offset
,
1501 struct p9_req_t
*req
;
1502 struct p9_client
*clnt
;
1503 int err
, rsize
, non_zc
= 0;
1506 P9_DPRINTK(P9_DEBUG_9P
, ">>> TREAD fid %d offset %llu %d\n",
1507 fid
->fid
, (long long unsigned) offset
, count
);
1511 rsize
= fid
->iounit
;
1512 if (!rsize
|| rsize
> clnt
->msize
-P9_IOHDRSZ
)
1513 rsize
= clnt
->msize
- P9_IOHDRSZ
;
1518 /* Don't bother zerocopy for small IO (< 1024) */
1519 if (clnt
->trans_mod
->zc_request
&& rsize
> 1024) {
1525 indata
= (char *)udata
;
1527 * response header len is 11
1528 * PDU Header(7) + IO Size (4)
1530 req
= p9_client_zc_rpc(clnt
, P9_TREAD
, indata
, NULL
, rsize
, 0,
1531 11, kernel_buf
, "dqd", fid
->fid
,
1535 req
= p9_client_rpc(clnt
, P9_TREAD
, "dqd", fid
->fid
, offset
,
1543 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "D", &count
, &dataptr
);
1545 P9_DUMP_PKT(1, req
->rc
);
1546 goto free_and_error
;
1549 P9_DPRINTK(P9_DEBUG_9P
, "<<< RREAD count %d\n", count
);
1550 P9_DUMP_PKT(1, req
->rc
);
1554 memmove(data
, dataptr
, count
);
1556 err
= copy_to_user(udata
, dataptr
, count
);
1559 goto free_and_error
;
1563 p9_free_req(clnt
, req
);
1567 p9_free_req(clnt
, req
);
1571 EXPORT_SYMBOL(p9_client_read
);
1574 p9_client_write(struct p9_fid
*fid
, char *data
, const char __user
*udata
,
1575 u64 offset
, u32 count
)
1579 struct p9_client
*clnt
;
1580 struct p9_req_t
*req
;
1582 P9_DPRINTK(P9_DEBUG_9P
, ">>> TWRITE fid %d offset %llu count %d\n",
1583 fid
->fid
, (long long unsigned) offset
, count
);
1587 rsize
= fid
->iounit
;
1588 if (!rsize
|| rsize
> clnt
->msize
-P9_IOHDRSZ
)
1589 rsize
= clnt
->msize
- P9_IOHDRSZ
;
1594 /* Don't bother zerocopy for small IO (< 1024) */
1595 if (clnt
->trans_mod
->zc_request
&& rsize
> 1024) {
1601 odata
= (char *)udata
;
1602 req
= p9_client_zc_rpc(clnt
, P9_TWRITE
, NULL
, odata
, 0, rsize
,
1603 P9_ZC_HDR_SZ
, kernel_buf
, "dqd",
1604 fid
->fid
, offset
, rsize
);
1607 req
= p9_client_rpc(clnt
, P9_TWRITE
, "dqD", fid
->fid
,
1608 offset
, rsize
, data
);
1610 req
= p9_client_rpc(clnt
, P9_TWRITE
, "dqU", fid
->fid
,
1611 offset
, rsize
, udata
);
1618 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "d", &count
);
1620 P9_DUMP_PKT(1, req
->rc
);
1621 goto free_and_error
;
1624 P9_DPRINTK(P9_DEBUG_9P
, "<<< RWRITE count %d\n", count
);
1626 p9_free_req(clnt
, req
);
1630 p9_free_req(clnt
, req
);
1634 EXPORT_SYMBOL(p9_client_write
);
1636 struct p9_wstat
*p9_client_stat(struct p9_fid
*fid
)
1639 struct p9_client
*clnt
;
1640 struct p9_wstat
*ret
= kmalloc(sizeof(struct p9_wstat
), GFP_KERNEL
);
1641 struct p9_req_t
*req
;
1644 P9_DPRINTK(P9_DEBUG_9P
, ">>> TSTAT fid %d\n", fid
->fid
);
1647 return ERR_PTR(-ENOMEM
);
1652 req
= p9_client_rpc(clnt
, P9_TSTAT
, "d", fid
->fid
);
1658 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "wS", &ignored
, ret
);
1660 P9_DUMP_PKT(1, req
->rc
);
1661 p9_free_req(clnt
, req
);
1665 P9_DPRINTK(P9_DEBUG_9P
,
1666 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1667 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1668 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1669 "<<< uid=%d gid=%d n_muid=%d\n",
1670 ret
->size
, ret
->type
, ret
->dev
, ret
->qid
.type
,
1671 (unsigned long long)ret
->qid
.path
, ret
->qid
.version
, ret
->mode
,
1672 ret
->atime
, ret
->mtime
, (unsigned long long)ret
->length
,
1673 ret
->name
, ret
->uid
, ret
->gid
, ret
->muid
, ret
->extension
,
1674 ret
->n_uid
, ret
->n_gid
, ret
->n_muid
);
1676 p9_free_req(clnt
, req
);
1681 return ERR_PTR(err
);
1683 EXPORT_SYMBOL(p9_client_stat
);
1685 struct p9_stat_dotl
*p9_client_getattr_dotl(struct p9_fid
*fid
,
1689 struct p9_client
*clnt
;
1690 struct p9_stat_dotl
*ret
= kmalloc(sizeof(struct p9_stat_dotl
),
1692 struct p9_req_t
*req
;
1694 P9_DPRINTK(P9_DEBUG_9P
, ">>> TGETATTR fid %d, request_mask %lld\n",
1695 fid
->fid
, request_mask
);
1698 return ERR_PTR(-ENOMEM
);
1703 req
= p9_client_rpc(clnt
, P9_TGETATTR
, "dq", fid
->fid
, request_mask
);
1709 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "A", ret
);
1711 P9_DUMP_PKT(1, req
->rc
);
1712 p9_free_req(clnt
, req
);
1716 P9_DPRINTK(P9_DEBUG_9P
,
1717 "<<< RGETATTR st_result_mask=%lld\n"
1718 "<<< qid=%x.%llx.%x\n"
1719 "<<< st_mode=%8.8x st_nlink=%llu\n"
1720 "<<< st_uid=%d st_gid=%d\n"
1721 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n"
1722 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n"
1723 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n"
1724 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n"
1725 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n"
1726 "<<< st_gen=%lld st_data_version=%lld",
1727 ret
->st_result_mask
, ret
->qid
.type
, ret
->qid
.path
,
1728 ret
->qid
.version
, ret
->st_mode
, ret
->st_nlink
, ret
->st_uid
,
1729 ret
->st_gid
, ret
->st_rdev
, ret
->st_size
, ret
->st_blksize
,
1730 ret
->st_blocks
, ret
->st_atime_sec
, ret
->st_atime_nsec
,
1731 ret
->st_mtime_sec
, ret
->st_mtime_nsec
, ret
->st_ctime_sec
,
1732 ret
->st_ctime_nsec
, ret
->st_btime_sec
, ret
->st_btime_nsec
,
1733 ret
->st_gen
, ret
->st_data_version
);
1735 p9_free_req(clnt
, req
);
1740 return ERR_PTR(err
);
1742 EXPORT_SYMBOL(p9_client_getattr_dotl
);
1744 static int p9_client_statsize(struct p9_wstat
*wst
, int proto_version
)
1748 /* NOTE: size shouldn't include its own length */
1749 /* size[2] type[2] dev[4] qid[13] */
1750 /* mode[4] atime[4] mtime[4] length[8]*/
1751 /* name[s] uid[s] gid[s] muid[s] */
1752 ret
= 2+4+13+4+4+4+8+2+2+2+2;
1755 ret
+= strlen(wst
->name
);
1757 ret
+= strlen(wst
->uid
);
1759 ret
+= strlen(wst
->gid
);
1761 ret
+= strlen(wst
->muid
);
1763 if ((proto_version
== p9_proto_2000u
) ||
1764 (proto_version
== p9_proto_2000L
)) {
1765 ret
+= 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
1767 ret
+= strlen(wst
->extension
);
1773 int p9_client_wstat(struct p9_fid
*fid
, struct p9_wstat
*wst
)
1776 struct p9_req_t
*req
;
1777 struct p9_client
*clnt
;
1781 wst
->size
= p9_client_statsize(wst
, clnt
->proto_version
);
1782 P9_DPRINTK(P9_DEBUG_9P
, ">>> TWSTAT fid %d\n", fid
->fid
);
1783 P9_DPRINTK(P9_DEBUG_9P
,
1784 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
1785 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n"
1786 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n"
1787 " uid=%d gid=%d n_muid=%d\n",
1788 wst
->size
, wst
->type
, wst
->dev
, wst
->qid
.type
,
1789 (unsigned long long)wst
->qid
.path
, wst
->qid
.version
, wst
->mode
,
1790 wst
->atime
, wst
->mtime
, (unsigned long long)wst
->length
,
1791 wst
->name
, wst
->uid
, wst
->gid
, wst
->muid
, wst
->extension
,
1792 wst
->n_uid
, wst
->n_gid
, wst
->n_muid
);
1794 req
= p9_client_rpc(clnt
, P9_TWSTAT
, "dwS", fid
->fid
, wst
->size
+2, wst
);
1800 P9_DPRINTK(P9_DEBUG_9P
, "<<< RWSTAT fid %d\n", fid
->fid
);
1802 p9_free_req(clnt
, req
);
1806 EXPORT_SYMBOL(p9_client_wstat
);
1808 int p9_client_setattr(struct p9_fid
*fid
, struct p9_iattr_dotl
*p9attr
)
1811 struct p9_req_t
*req
;
1812 struct p9_client
*clnt
;
1816 P9_DPRINTK(P9_DEBUG_9P
, ">>> TSETATTR fid %d\n", fid
->fid
);
1817 P9_DPRINTK(P9_DEBUG_9P
,
1818 " valid=%x mode=%x uid=%d gid=%d size=%lld\n"
1819 " atime_sec=%lld atime_nsec=%lld\n"
1820 " mtime_sec=%lld mtime_nsec=%lld\n",
1821 p9attr
->valid
, p9attr
->mode
, p9attr
->uid
, p9attr
->gid
,
1822 p9attr
->size
, p9attr
->atime_sec
, p9attr
->atime_nsec
,
1823 p9attr
->mtime_sec
, p9attr
->mtime_nsec
);
1825 req
= p9_client_rpc(clnt
, P9_TSETATTR
, "dI", fid
->fid
, p9attr
);
1831 P9_DPRINTK(P9_DEBUG_9P
, "<<< RSETATTR fid %d\n", fid
->fid
);
1832 p9_free_req(clnt
, req
);
1836 EXPORT_SYMBOL(p9_client_setattr
);
1838 int p9_client_statfs(struct p9_fid
*fid
, struct p9_rstatfs
*sb
)
1841 struct p9_req_t
*req
;
1842 struct p9_client
*clnt
;
1847 P9_DPRINTK(P9_DEBUG_9P
, ">>> TSTATFS fid %d\n", fid
->fid
);
1849 req
= p9_client_rpc(clnt
, P9_TSTATFS
, "d", fid
->fid
);
1855 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "ddqqqqqqd", &sb
->type
,
1856 &sb
->bsize
, &sb
->blocks
, &sb
->bfree
, &sb
->bavail
,
1857 &sb
->files
, &sb
->ffree
, &sb
->fsid
, &sb
->namelen
);
1859 P9_DUMP_PKT(1, req
->rc
);
1860 p9_free_req(clnt
, req
);
1864 P9_DPRINTK(P9_DEBUG_9P
, "<<< RSTATFS fid %d type 0x%lx bsize %ld "
1865 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu "
1866 "fsid %llu namelen %ld\n",
1867 fid
->fid
, (long unsigned int)sb
->type
, (long int)sb
->bsize
,
1868 sb
->blocks
, sb
->bfree
, sb
->bavail
, sb
->files
, sb
->ffree
,
1869 sb
->fsid
, (long int)sb
->namelen
);
1871 p9_free_req(clnt
, req
);
1875 EXPORT_SYMBOL(p9_client_statfs
);
1877 int p9_client_rename(struct p9_fid
*fid
,
1878 struct p9_fid
*newdirfid
, const char *name
)
1881 struct p9_req_t
*req
;
1882 struct p9_client
*clnt
;
1887 P9_DPRINTK(P9_DEBUG_9P
, ">>> TRENAME fid %d newdirfid %d name %s\n",
1888 fid
->fid
, newdirfid
->fid
, name
);
1890 req
= p9_client_rpc(clnt
, P9_TRENAME
, "dds", fid
->fid
,
1891 newdirfid
->fid
, name
);
1897 P9_DPRINTK(P9_DEBUG_9P
, "<<< RRENAME fid %d\n", fid
->fid
);
1899 p9_free_req(clnt
, req
);
1903 EXPORT_SYMBOL(p9_client_rename
);
1905 int p9_client_renameat(struct p9_fid
*olddirfid
, const char *old_name
,
1906 struct p9_fid
*newdirfid
, const char *new_name
)
1909 struct p9_req_t
*req
;
1910 struct p9_client
*clnt
;
1913 clnt
= olddirfid
->clnt
;
1915 P9_DPRINTK(P9_DEBUG_9P
, ">>> TRENAMEAT olddirfid %d old name %s"
1916 " newdirfid %d new name %s\n", olddirfid
->fid
, old_name
,
1917 newdirfid
->fid
, new_name
);
1919 req
= p9_client_rpc(clnt
, P9_TRENAMEAT
, "dsds", olddirfid
->fid
,
1920 old_name
, newdirfid
->fid
, new_name
);
1926 P9_DPRINTK(P9_DEBUG_9P
, "<<< RRENAMEAT newdirfid %d new name %s\n",
1927 newdirfid
->fid
, new_name
);
1929 p9_free_req(clnt
, req
);
1933 EXPORT_SYMBOL(p9_client_renameat
);
1936 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace
1938 struct p9_fid
*p9_client_xattrwalk(struct p9_fid
*file_fid
,
1939 const char *attr_name
, u64
*attr_size
)
1942 struct p9_req_t
*req
;
1943 struct p9_client
*clnt
;
1944 struct p9_fid
*attr_fid
;
1947 clnt
= file_fid
->clnt
;
1948 attr_fid
= p9_fid_create(clnt
);
1949 if (IS_ERR(attr_fid
)) {
1950 err
= PTR_ERR(attr_fid
);
1954 P9_DPRINTK(P9_DEBUG_9P
,
1955 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
1956 file_fid
->fid
, attr_fid
->fid
, attr_name
);
1958 req
= p9_client_rpc(clnt
, P9_TXATTRWALK
, "dds",
1959 file_fid
->fid
, attr_fid
->fid
, attr_name
);
1964 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "q", attr_size
);
1966 P9_DUMP_PKT(1, req
->rc
);
1967 p9_free_req(clnt
, req
);
1970 p9_free_req(clnt
, req
);
1971 P9_DPRINTK(P9_DEBUG_9P
, "<<< RXATTRWALK fid %d size %llu\n",
1972 attr_fid
->fid
, *attr_size
);
1975 p9_client_clunk(attr_fid
);
1978 if (attr_fid
&& (attr_fid
!= file_fid
))
1979 p9_fid_destroy(attr_fid
);
1981 return ERR_PTR(err
);
1983 EXPORT_SYMBOL_GPL(p9_client_xattrwalk
);
1985 int p9_client_xattrcreate(struct p9_fid
*fid
, const char *name
,
1986 u64 attr_size
, int flags
)
1989 struct p9_req_t
*req
;
1990 struct p9_client
*clnt
;
1992 P9_DPRINTK(P9_DEBUG_9P
,
1993 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n",
1994 fid
->fid
, name
, (long long)attr_size
, flags
);
1997 req
= p9_client_rpc(clnt
, P9_TXATTRCREATE
, "dsqd",
1998 fid
->fid
, name
, attr_size
, flags
);
2003 P9_DPRINTK(P9_DEBUG_9P
, "<<< RXATTRCREATE fid %d\n", fid
->fid
);
2004 p9_free_req(clnt
, req
);
2008 EXPORT_SYMBOL_GPL(p9_client_xattrcreate
);
2010 int p9_client_readdir(struct p9_fid
*fid
, char *data
, u32 count
, u64 offset
)
2012 int err
, rsize
, non_zc
= 0;
2013 struct p9_client
*clnt
;
2014 struct p9_req_t
*req
;
2017 P9_DPRINTK(P9_DEBUG_9P
, ">>> TREADDIR fid %d offset %llu count %d\n",
2018 fid
->fid
, (long long unsigned) offset
, count
);
2023 rsize
= fid
->iounit
;
2024 if (!rsize
|| rsize
> clnt
->msize
-P9_READDIRHDRSZ
)
2025 rsize
= clnt
->msize
- P9_READDIRHDRSZ
;
2030 /* Don't bother zerocopy for small IO (< 1024) */
2031 if (clnt
->trans_mod
->zc_request
&& rsize
> 1024) {
2033 * response header len is 11
2034 * PDU Header(7) + IO Size (4)
2036 req
= p9_client_zc_rpc(clnt
, P9_TREADDIR
, data
, NULL
, rsize
, 0,
2037 11, 1, "dqd", fid
->fid
, offset
, rsize
);
2040 req
= p9_client_rpc(clnt
, P9_TREADDIR
, "dqd", fid
->fid
,
2048 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "D", &count
, &dataptr
);
2050 P9_DUMP_PKT(1, req
->rc
);
2051 goto free_and_error
;
2054 P9_DPRINTK(P9_DEBUG_9P
, "<<< RREADDIR count %d\n", count
);
2057 memmove(data
, dataptr
, count
);
2059 p9_free_req(clnt
, req
);
2063 p9_free_req(clnt
, req
);
2067 EXPORT_SYMBOL(p9_client_readdir
);
2069 int p9_client_mknod_dotl(struct p9_fid
*fid
, char *name
, int mode
,
2070 dev_t rdev
, gid_t gid
, struct p9_qid
*qid
)
2073 struct p9_client
*clnt
;
2074 struct p9_req_t
*req
;
2078 P9_DPRINTK(P9_DEBUG_9P
, ">>> TMKNOD fid %d name %s mode %d major %d "
2079 "minor %d\n", fid
->fid
, name
, mode
, MAJOR(rdev
), MINOR(rdev
));
2080 req
= p9_client_rpc(clnt
, P9_TMKNOD
, "dsdddd", fid
->fid
, name
, mode
,
2081 MAJOR(rdev
), MINOR(rdev
), gid
);
2083 return PTR_ERR(req
);
2085 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Q", qid
);
2087 P9_DUMP_PKT(1, req
->rc
);
2090 P9_DPRINTK(P9_DEBUG_9P
, "<<< RMKNOD qid %x.%llx.%x\n", qid
->type
,
2091 (unsigned long long)qid
->path
, qid
->version
);
2094 p9_free_req(clnt
, req
);
2098 EXPORT_SYMBOL(p9_client_mknod_dotl
);
2100 int p9_client_mkdir_dotl(struct p9_fid
*fid
, char *name
, int mode
,
2101 gid_t gid
, struct p9_qid
*qid
)
2104 struct p9_client
*clnt
;
2105 struct p9_req_t
*req
;
2109 P9_DPRINTK(P9_DEBUG_9P
, ">>> TMKDIR fid %d name %s mode %d gid %d\n",
2110 fid
->fid
, name
, mode
, gid
);
2111 req
= p9_client_rpc(clnt
, P9_TMKDIR
, "dsdd", fid
->fid
, name
, mode
,
2114 return PTR_ERR(req
);
2116 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "Q", qid
);
2118 P9_DUMP_PKT(1, req
->rc
);
2121 P9_DPRINTK(P9_DEBUG_9P
, "<<< RMKDIR qid %x.%llx.%x\n", qid
->type
,
2122 (unsigned long long)qid
->path
, qid
->version
);
2125 p9_free_req(clnt
, req
);
2129 EXPORT_SYMBOL(p9_client_mkdir_dotl
);
2131 int p9_client_lock_dotl(struct p9_fid
*fid
, struct p9_flock
*flock
, u8
*status
)
2134 struct p9_client
*clnt
;
2135 struct p9_req_t
*req
;
2139 P9_DPRINTK(P9_DEBUG_9P
, ">>> TLOCK fid %d type %i flags %d "
2140 "start %lld length %lld proc_id %d client_id %s\n",
2141 fid
->fid
, flock
->type
, flock
->flags
, flock
->start
,
2142 flock
->length
, flock
->proc_id
, flock
->client_id
);
2144 req
= p9_client_rpc(clnt
, P9_TLOCK
, "dbdqqds", fid
->fid
, flock
->type
,
2145 flock
->flags
, flock
->start
, flock
->length
,
2146 flock
->proc_id
, flock
->client_id
);
2149 return PTR_ERR(req
);
2151 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "b", status
);
2153 P9_DUMP_PKT(1, req
->rc
);
2156 P9_DPRINTK(P9_DEBUG_9P
, "<<< RLOCK status %i\n", *status
);
2158 p9_free_req(clnt
, req
);
2162 EXPORT_SYMBOL(p9_client_lock_dotl
);
2164 int p9_client_getlock_dotl(struct p9_fid
*fid
, struct p9_getlock
*glock
)
2167 struct p9_client
*clnt
;
2168 struct p9_req_t
*req
;
2172 P9_DPRINTK(P9_DEBUG_9P
, ">>> TGETLOCK fid %d, type %i start %lld "
2173 "length %lld proc_id %d client_id %s\n", fid
->fid
, glock
->type
,
2174 glock
->start
, glock
->length
, glock
->proc_id
, glock
->client_id
);
2176 req
= p9_client_rpc(clnt
, P9_TGETLOCK
, "dbqqds", fid
->fid
, glock
->type
,
2177 glock
->start
, glock
->length
, glock
->proc_id
, glock
->client_id
);
2180 return PTR_ERR(req
);
2182 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "bqqds", &glock
->type
,
2183 &glock
->start
, &glock
->length
, &glock
->proc_id
,
2186 P9_DUMP_PKT(1, req
->rc
);
2189 P9_DPRINTK(P9_DEBUG_9P
, "<<< RGETLOCK type %i start %lld length %lld "
2190 "proc_id %d client_id %s\n", glock
->type
, glock
->start
,
2191 glock
->length
, glock
->proc_id
, glock
->client_id
);
2193 p9_free_req(clnt
, req
);
2196 EXPORT_SYMBOL(p9_client_getlock_dotl
);
2198 int p9_client_readlink(struct p9_fid
*fid
, char **target
)
2201 struct p9_client
*clnt
;
2202 struct p9_req_t
*req
;
2206 P9_DPRINTK(P9_DEBUG_9P
, ">>> TREADLINK fid %d\n", fid
->fid
);
2208 req
= p9_client_rpc(clnt
, P9_TREADLINK
, "d", fid
->fid
);
2210 return PTR_ERR(req
);
2212 err
= p9pdu_readf(req
->rc
, clnt
->proto_version
, "s", target
);
2214 P9_DUMP_PKT(1, req
->rc
);
2217 P9_DPRINTK(P9_DEBUG_9P
, "<<< RREADLINK target %s\n", *target
);
2219 p9_free_req(clnt
, req
);
2222 EXPORT_SYMBOL(p9_client_readlink
);