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21#include <linux/types.h>
22#include <linux/slab.h>
23#include <linux/module.h>
24#include <linux/capability.h>
25#include <linux/pagemap.h>
26#include <linux/errno.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/net.h>
30#include <linux/mm.h>
31#include <linux/udp.h>
32#include <linux/tcp.h>
33#include <linux/sunrpc/clnt.h>
34#include <linux/sunrpc/sched.h>
35#include <linux/sunrpc/svcsock.h>
36#include <linux/sunrpc/xprtsock.h>
37#include <linux/file.h>
38#ifdef CONFIG_NFS_V4_1
39#include <linux/sunrpc/bc_xprt.h>
40#endif
41
42#include <net/sock.h>
43#include <net/checksum.h>
44#include <net/udp.h>
45#include <net/tcp.h>
46
47#include "sunrpc.h"
48
49
50
51unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE;
52unsigned int xprt_tcp_slot_table_entries = RPC_DEF_SLOT_TABLE;
53
54unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT;
55unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT;
56
57#define XS_TCP_LINGER_TO (15U * HZ)
58static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO;
59
60
61
62
63
64
65
66
67
68
69#ifdef RPC_DEBUG
70
71static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE;
72static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE;
73static unsigned int xprt_min_resvport_limit = RPC_MIN_RESVPORT;
74static unsigned int xprt_max_resvport_limit = RPC_MAX_RESVPORT;
75
76static struct ctl_table_header *sunrpc_table_header;
77
78
79
80
81
82static ctl_table xs_tunables_table[] = {
83 {
84 .procname = "udp_slot_table_entries",
85 .data = &xprt_udp_slot_table_entries,
86 .maxlen = sizeof(unsigned int),
87 .mode = 0644,
88 .proc_handler = proc_dointvec_minmax,
89 .extra1 = &min_slot_table_size,
90 .extra2 = &max_slot_table_size
91 },
92 {
93 .procname = "tcp_slot_table_entries",
94 .data = &xprt_tcp_slot_table_entries,
95 .maxlen = sizeof(unsigned int),
96 .mode = 0644,
97 .proc_handler = proc_dointvec_minmax,
98 .extra1 = &min_slot_table_size,
99 .extra2 = &max_slot_table_size
100 },
101 {
102 .procname = "min_resvport",
103 .data = &xprt_min_resvport,
104 .maxlen = sizeof(unsigned int),
105 .mode = 0644,
106 .proc_handler = proc_dointvec_minmax,
107 .extra1 = &xprt_min_resvport_limit,
108 .extra2 = &xprt_max_resvport_limit
109 },
110 {
111 .procname = "max_resvport",
112 .data = &xprt_max_resvport,
113 .maxlen = sizeof(unsigned int),
114 .mode = 0644,
115 .proc_handler = proc_dointvec_minmax,
116 .extra1 = &xprt_min_resvport_limit,
117 .extra2 = &xprt_max_resvport_limit
118 },
119 {
120 .procname = "tcp_fin_timeout",
121 .data = &xs_tcp_fin_timeout,
122 .maxlen = sizeof(xs_tcp_fin_timeout),
123 .mode = 0644,
124 .proc_handler = proc_dointvec_jiffies,
125 },
126 { },
127};
128
129static ctl_table sunrpc_table[] = {
130 {
131 .procname = "sunrpc",
132 .mode = 0555,
133 .child = xs_tunables_table
134 },
135 { },
136};
137
138#endif
139
140
141
142
143#define XS_BIND_TO (60U * HZ)
144
145
146
147
148
149#define XS_UDP_REEST_TO (2U * HZ)
150
151
152
153
154
155
156
157
158
159
160#define XS_TCP_INIT_REEST_TO (3U * HZ)
161#define XS_TCP_MAX_REEST_TO (5U * 60 * HZ)
162
163
164
165
166
167
168#define XS_IDLE_DISC_TO (5U * 60 * HZ)
169
170#ifdef RPC_DEBUG
171# undef RPC_DEBUG_DATA
172# define RPCDBG_FACILITY RPCDBG_TRANS
173#endif
174
175#ifdef RPC_DEBUG_DATA
176static void xs_pktdump(char *msg, u32 *packet, unsigned int count)
177{
178 u8 *buf = (u8 *) packet;
179 int j;
180
181 dprintk("RPC: %s\n", msg);
182 for (j = 0; j < count && j < 128; j += 4) {
183 if (!(j & 31)) {
184 if (j)
185 dprintk("\n");
186 dprintk("0x%04x ", j);
187 }
188 dprintk("%02x%02x%02x%02x ",
189 buf[j], buf[j+1], buf[j+2], buf[j+3]);
190 }
191 dprintk("\n");
192}
193#else
194static inline void xs_pktdump(char *msg, u32 *packet, unsigned int count)
195{
196
197}
198#endif
199
200struct sock_xprt {
201 struct rpc_xprt xprt;
202
203
204
205
206 struct socket * sock;
207 struct sock * inet;
208
209
210
211
212 __be32 tcp_fraghdr,
213 tcp_xid,
214 tcp_calldir;
215
216 u32 tcp_offset,
217 tcp_reclen;
218
219 unsigned long tcp_copied,
220 tcp_flags;
221
222
223
224
225 struct delayed_work connect_worker;
226 struct sockaddr_storage srcaddr;
227 unsigned short srcport;
228
229
230
231
232 size_t rcvsize,
233 sndsize;
234
235
236
237
238 void (*old_data_ready)(struct sock *, int);
239 void (*old_state_change)(struct sock *);
240 void (*old_write_space)(struct sock *);
241 void (*old_error_report)(struct sock *);
242};
243
244
245
246
247#define TCP_RCV_LAST_FRAG (1UL << 0)
248#define TCP_RCV_COPY_FRAGHDR (1UL << 1)
249#define TCP_RCV_COPY_XID (1UL << 2)
250#define TCP_RCV_COPY_DATA (1UL << 3)
251#define TCP_RCV_READ_CALLDIR (1UL << 4)
252#define TCP_RCV_COPY_CALLDIR (1UL << 5)
253
254
255
256
257#define TCP_RPC_REPLY (1UL << 6)
258
259static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt)
260{
261 return (struct sockaddr *) &xprt->addr;
262}
263
264static inline struct sockaddr_in *xs_addr_in(struct rpc_xprt *xprt)
265{
266 return (struct sockaddr_in *) &xprt->addr;
267}
268
269static inline struct sockaddr_in6 *xs_addr_in6(struct rpc_xprt *xprt)
270{
271 return (struct sockaddr_in6 *) &xprt->addr;
272}
273
274static void xs_format_common_peer_addresses(struct rpc_xprt *xprt)
275{
276 struct sockaddr *sap = xs_addr(xprt);
277 struct sockaddr_in6 *sin6;
278 struct sockaddr_in *sin;
279 char buf[128];
280
281 (void)rpc_ntop(sap, buf, sizeof(buf));
282 xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
283
284 switch (sap->sa_family) {
285 case AF_INET:
286 sin = xs_addr_in(xprt);
287 snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
288 break;
289 case AF_INET6:
290 sin6 = xs_addr_in6(xprt);
291 snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
292 break;
293 default:
294 BUG();
295 }
296 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
297}
298
299static void xs_format_common_peer_ports(struct rpc_xprt *xprt)
300{
301 struct sockaddr *sap = xs_addr(xprt);
302 char buf[128];
303
304 snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
305 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
306
307 snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
308 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
309}
310
311static void xs_format_peer_addresses(struct rpc_xprt *xprt,
312 const char *protocol,
313 const char *netid)
314{
315 xprt->address_strings[RPC_DISPLAY_PROTO] = protocol;
316 xprt->address_strings[RPC_DISPLAY_NETID] = netid;
317 xs_format_common_peer_addresses(xprt);
318 xs_format_common_peer_ports(xprt);
319}
320
321static void xs_update_peer_port(struct rpc_xprt *xprt)
322{
323 kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]);
324 kfree(xprt->address_strings[RPC_DISPLAY_PORT]);
325
326 xs_format_common_peer_ports(xprt);
327}
328
329static void xs_free_peer_addresses(struct rpc_xprt *xprt)
330{
331 unsigned int i;
332
333 for (i = 0; i < RPC_DISPLAY_MAX; i++)
334 switch (i) {
335 case RPC_DISPLAY_PROTO:
336 case RPC_DISPLAY_NETID:
337 continue;
338 default:
339 kfree(xprt->address_strings[i]);
340 }
341}
342
343#define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL)
344
345static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more)
346{
347 struct msghdr msg = {
348 .msg_name = addr,
349 .msg_namelen = addrlen,
350 .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0),
351 };
352 struct kvec iov = {
353 .iov_base = vec->iov_base + base,
354 .iov_len = vec->iov_len - base,
355 };
356
357 if (iov.iov_len != 0)
358 return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len);
359 return kernel_sendmsg(sock, &msg, NULL, 0, 0);
360}
361
362static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more)
363{
364 struct page **ppage;
365 unsigned int remainder;
366 int err, sent = 0;
367
368 remainder = xdr->page_len - base;
369 base += xdr->page_base;
370 ppage = xdr->pages + (base >> PAGE_SHIFT);
371 base &= ~PAGE_MASK;
372 for(;;) {
373 unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder);
374 int flags = XS_SENDMSG_FLAGS;
375
376 remainder -= len;
377 if (remainder != 0 || more)
378 flags |= MSG_MORE;
379 err = sock->ops->sendpage(sock, *ppage, base, len, flags);
380 if (remainder == 0 || err != len)
381 break;
382 sent += err;
383 ppage++;
384 base = 0;
385 }
386 if (sent == 0)
387 return err;
388 if (err > 0)
389 sent += err;
390 return sent;
391}
392
393
394
395
396
397
398
399
400
401
402static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base)
403{
404 unsigned int remainder = xdr->len - base;
405 int err, sent = 0;
406
407 if (unlikely(!sock))
408 return -ENOTSOCK;
409
410 clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags);
411 if (base != 0) {
412 addr = NULL;
413 addrlen = 0;
414 }
415
416 if (base < xdr->head[0].iov_len || addr != NULL) {
417 unsigned int len = xdr->head[0].iov_len - base;
418 remainder -= len;
419 err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0);
420 if (remainder == 0 || err != len)
421 goto out;
422 sent += err;
423 base = 0;
424 } else
425 base -= xdr->head[0].iov_len;
426
427 if (base < xdr->page_len) {
428 unsigned int len = xdr->page_len - base;
429 remainder -= len;
430 err = xs_send_pagedata(sock, xdr, base, remainder != 0);
431 if (remainder == 0 || err != len)
432 goto out;
433 sent += err;
434 base = 0;
435 } else
436 base -= xdr->page_len;
437
438 if (base >= xdr->tail[0].iov_len)
439 return sent;
440 err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0);
441out:
442 if (sent == 0)
443 return err;
444 if (err > 0)
445 sent += err;
446 return sent;
447}
448
449static void xs_nospace_callback(struct rpc_task *task)
450{
451 struct sock_xprt *transport = container_of(task->tk_rqstp->rq_xprt, struct sock_xprt, xprt);
452
453 transport->inet->sk_write_pending--;
454 clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
455}
456
457
458
459
460
461
462static int xs_nospace(struct rpc_task *task)
463{
464 struct rpc_rqst *req = task->tk_rqstp;
465 struct rpc_xprt *xprt = req->rq_xprt;
466 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
467 int ret = 0;
468
469 dprintk("RPC: %5u xmit incomplete (%u left of %u)\n",
470 task->tk_pid, req->rq_slen - req->rq_bytes_sent,
471 req->rq_slen);
472
473
474 spin_lock_bh(&xprt->transport_lock);
475
476
477 if (xprt_connected(xprt)) {
478 if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) {
479 ret = -EAGAIN;
480
481
482
483
484 set_bit(SOCK_NOSPACE, &transport->sock->flags);
485 transport->inet->sk_write_pending++;
486
487 xprt_wait_for_buffer_space(task, xs_nospace_callback);
488 }
489 } else {
490 clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
491 ret = -ENOTCONN;
492 }
493
494 spin_unlock_bh(&xprt->transport_lock);
495 return ret;
496}
497
498
499
500
501
502
503
504
505
506
507
508
509static int xs_udp_send_request(struct rpc_task *task)
510{
511 struct rpc_rqst *req = task->tk_rqstp;
512 struct rpc_xprt *xprt = req->rq_xprt;
513 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
514 struct xdr_buf *xdr = &req->rq_snd_buf;
515 int status;
516
517 xs_pktdump("packet data:",
518 req->rq_svec->iov_base,
519 req->rq_svec->iov_len);
520
521 if (!xprt_bound(xprt))
522 return -ENOTCONN;
523 status = xs_sendpages(transport->sock,
524 xs_addr(xprt),
525 xprt->addrlen, xdr,
526 req->rq_bytes_sent);
527
528 dprintk("RPC: xs_udp_send_request(%u) = %d\n",
529 xdr->len - req->rq_bytes_sent, status);
530
531 if (status >= 0) {
532 req->rq_xmit_bytes_sent += status;
533 if (status >= req->rq_slen)
534 return 0;
535
536 status = -EAGAIN;
537 }
538
539 switch (status) {
540 case -ENOTSOCK:
541 status = -ENOTCONN;
542
543 break;
544 case -EAGAIN:
545 status = xs_nospace(task);
546 break;
547 default:
548 dprintk("RPC: sendmsg returned unrecognized error %d\n",
549 -status);
550 case -ENETUNREACH:
551 case -EPIPE:
552 case -ECONNREFUSED:
553
554
555 clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
556 }
557
558 return status;
559}
560
561
562
563
564
565
566
567
568static void xs_tcp_shutdown(struct rpc_xprt *xprt)
569{
570 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
571 struct socket *sock = transport->sock;
572
573 if (sock != NULL)
574 kernel_sock_shutdown(sock, SHUT_WR);
575}
576
577static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf)
578{
579 u32 reclen = buf->len - sizeof(rpc_fraghdr);
580 rpc_fraghdr *base = buf->head[0].iov_base;
581 *base = htonl(RPC_LAST_STREAM_FRAGMENT | reclen);
582}
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598static int xs_tcp_send_request(struct rpc_task *task)
599{
600 struct rpc_rqst *req = task->tk_rqstp;
601 struct rpc_xprt *xprt = req->rq_xprt;
602 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
603 struct xdr_buf *xdr = &req->rq_snd_buf;
604 int status;
605
606 xs_encode_tcp_record_marker(&req->rq_snd_buf);
607
608 xs_pktdump("packet data:",
609 req->rq_svec->iov_base,
610 req->rq_svec->iov_len);
611
612
613
614
615 while (1) {
616 status = xs_sendpages(transport->sock,
617 NULL, 0, xdr, req->rq_bytes_sent);
618
619 dprintk("RPC: xs_tcp_send_request(%u) = %d\n",
620 xdr->len - req->rq_bytes_sent, status);
621
622 if (unlikely(status < 0))
623 break;
624
625
626
627 req->rq_bytes_sent += status;
628 req->rq_xmit_bytes_sent += status;
629 if (likely(req->rq_bytes_sent >= req->rq_slen)) {
630 req->rq_bytes_sent = 0;
631 return 0;
632 }
633
634 if (status != 0)
635 continue;
636 status = -EAGAIN;
637 break;
638 }
639
640 switch (status) {
641 case -ENOTSOCK:
642 status = -ENOTCONN;
643
644 break;
645 case -EAGAIN:
646 status = xs_nospace(task);
647 break;
648 default:
649 dprintk("RPC: sendmsg returned unrecognized error %d\n",
650 -status);
651 case -ECONNRESET:
652 case -EPIPE:
653 xs_tcp_shutdown(xprt);
654 case -ECONNREFUSED:
655 case -ENOTCONN:
656 clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
657 }
658
659 return status;
660}
661
662
663
664
665
666
667
668
669
670
671static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task)
672{
673 struct rpc_rqst *req;
674
675 if (task != xprt->snd_task)
676 return;
677 if (task == NULL)
678 goto out_release;
679 req = task->tk_rqstp;
680 if (req->rq_bytes_sent == 0)
681 goto out_release;
682 if (req->rq_bytes_sent == req->rq_snd_buf.len)
683 goto out_release;
684 set_bit(XPRT_CLOSE_WAIT, &task->tk_xprt->state);
685out_release:
686 xprt_release_xprt(xprt, task);
687}
688
689static void xs_save_old_callbacks(struct sock_xprt *transport, struct sock *sk)
690{
691 transport->old_data_ready = sk->sk_data_ready;
692 transport->old_state_change = sk->sk_state_change;
693 transport->old_write_space = sk->sk_write_space;
694 transport->old_error_report = sk->sk_error_report;
695}
696
697static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *sk)
698{
699 sk->sk_data_ready = transport->old_data_ready;
700 sk->sk_state_change = transport->old_state_change;
701 sk->sk_write_space = transport->old_write_space;
702 sk->sk_error_report = transport->old_error_report;
703}
704
705static void xs_reset_transport(struct sock_xprt *transport)
706{
707 struct socket *sock = transport->sock;
708 struct sock *sk = transport->inet;
709
710 if (sk == NULL)
711 return;
712
713 write_lock_bh(&sk->sk_callback_lock);
714 transport->inet = NULL;
715 transport->sock = NULL;
716
717 sk->sk_user_data = NULL;
718
719 xs_restore_old_callbacks(transport, sk);
720 write_unlock_bh(&sk->sk_callback_lock);
721
722 sk->sk_no_check = 0;
723
724 sock_release(sock);
725}
726
727
728
729
730
731
732
733
734
735
736
737static void xs_close(struct rpc_xprt *xprt)
738{
739 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
740
741 dprintk("RPC: xs_close xprt %p\n", xprt);
742
743 xs_reset_transport(transport);
744 xprt->reestablish_timeout = 0;
745
746 smp_mb__before_clear_bit();
747 clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
748 clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
749 clear_bit(XPRT_CLOSING, &xprt->state);
750 smp_mb__after_clear_bit();
751 xprt_disconnect_done(xprt);
752}
753
754static void xs_tcp_close(struct rpc_xprt *xprt)
755{
756 if (test_and_clear_bit(XPRT_CONNECTION_CLOSE, &xprt->state))
757 xs_close(xprt);
758 else
759 xs_tcp_shutdown(xprt);
760}
761
762
763
764
765
766
767static void xs_destroy(struct rpc_xprt *xprt)
768{
769 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
770
771 dprintk("RPC: xs_destroy xprt %p\n", xprt);
772
773 cancel_delayed_work_sync(&transport->connect_worker);
774
775 xs_close(xprt);
776 xs_free_peer_addresses(xprt);
777 xprt_free(xprt);
778 module_put(THIS_MODULE);
779}
780
781static inline struct rpc_xprt *xprt_from_sock(struct sock *sk)
782{
783 return (struct rpc_xprt *) sk->sk_user_data;
784}
785
786
787
788
789
790
791
792static void xs_udp_data_ready(struct sock *sk, int len)
793{
794 struct rpc_task *task;
795 struct rpc_xprt *xprt;
796 struct rpc_rqst *rovr;
797 struct sk_buff *skb;
798 int err, repsize, copied;
799 u32 _xid;
800 __be32 *xp;
801
802 read_lock_bh(&sk->sk_callback_lock);
803 dprintk("RPC: xs_udp_data_ready...\n");
804 if (!(xprt = xprt_from_sock(sk)))
805 goto out;
806
807 if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL)
808 goto out;
809
810 if (xprt->shutdown)
811 goto dropit;
812
813 repsize = skb->len - sizeof(struct udphdr);
814 if (repsize < 4) {
815 dprintk("RPC: impossible RPC reply size %d!\n", repsize);
816 goto dropit;
817 }
818
819
820 xp = skb_header_pointer(skb, sizeof(struct udphdr),
821 sizeof(_xid), &_xid);
822 if (xp == NULL)
823 goto dropit;
824
825
826 spin_lock(&xprt->transport_lock);
827 rovr = xprt_lookup_rqst(xprt, *xp);
828 if (!rovr)
829 goto out_unlock;
830 task = rovr->rq_task;
831
832 if ((copied = rovr->rq_private_buf.buflen) > repsize)
833 copied = repsize;
834
835
836 if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) {
837 UDPX_INC_STATS_BH(sk, UDP_MIB_INERRORS);
838 goto out_unlock;
839 }
840
841 UDPX_INC_STATS_BH(sk, UDP_MIB_INDATAGRAMS);
842
843
844 dst_confirm(skb_dst(skb));
845
846 xprt_adjust_cwnd(task, copied);
847 xprt_complete_rqst(task, copied);
848
849 out_unlock:
850 spin_unlock(&xprt->transport_lock);
851 dropit:
852 skb_free_datagram(sk, skb);
853 out:
854 read_unlock_bh(&sk->sk_callback_lock);
855}
856
857static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc)
858{
859 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
860 size_t len, used;
861 char *p;
862
863 p = ((char *) &transport->tcp_fraghdr) + transport->tcp_offset;
864 len = sizeof(transport->tcp_fraghdr) - transport->tcp_offset;
865 used = xdr_skb_read_bits(desc, p, len);
866 transport->tcp_offset += used;
867 if (used != len)
868 return;
869
870 transport->tcp_reclen = ntohl(transport->tcp_fraghdr);
871 if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT)
872 transport->tcp_flags |= TCP_RCV_LAST_FRAG;
873 else
874 transport->tcp_flags &= ~TCP_RCV_LAST_FRAG;
875 transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK;
876
877 transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR;
878 transport->tcp_offset = 0;
879
880
881 if (unlikely(transport->tcp_reclen < 8)) {
882 dprintk("RPC: invalid TCP record fragment length\n");
883 xprt_force_disconnect(xprt);
884 return;
885 }
886 dprintk("RPC: reading TCP record fragment of length %d\n",
887 transport->tcp_reclen);
888}
889
890static void xs_tcp_check_fraghdr(struct sock_xprt *transport)
891{
892 if (transport->tcp_offset == transport->tcp_reclen) {
893 transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR;
894 transport->tcp_offset = 0;
895 if (transport->tcp_flags & TCP_RCV_LAST_FRAG) {
896 transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
897 transport->tcp_flags |= TCP_RCV_COPY_XID;
898 transport->tcp_copied = 0;
899 }
900 }
901}
902
903static inline void xs_tcp_read_xid(struct sock_xprt *transport, struct xdr_skb_reader *desc)
904{
905 size_t len, used;
906 char *p;
907
908 len = sizeof(transport->tcp_xid) - transport->tcp_offset;
909 dprintk("RPC: reading XID (%Zu bytes)\n", len);
910 p = ((char *) &transport->tcp_xid) + transport->tcp_offset;
911 used = xdr_skb_read_bits(desc, p, len);
912 transport->tcp_offset += used;
913 if (used != len)
914 return;
915 transport->tcp_flags &= ~TCP_RCV_COPY_XID;
916 transport->tcp_flags |= TCP_RCV_READ_CALLDIR;
917 transport->tcp_copied = 4;
918 dprintk("RPC: reading %s XID %08x\n",
919 (transport->tcp_flags & TCP_RPC_REPLY) ? "reply for"
920 : "request with",
921 ntohl(transport->tcp_xid));
922 xs_tcp_check_fraghdr(transport);
923}
924
925static inline void xs_tcp_read_calldir(struct sock_xprt *transport,
926 struct xdr_skb_reader *desc)
927{
928 size_t len, used;
929 u32 offset;
930 char *p;
931
932
933
934
935
936
937
938 offset = transport->tcp_offset - sizeof(transport->tcp_xid);
939 len = sizeof(transport->tcp_calldir) - offset;
940 dprintk("RPC: reading CALL/REPLY flag (%Zu bytes)\n", len);
941 p = ((char *) &transport->tcp_calldir) + offset;
942 used = xdr_skb_read_bits(desc, p, len);
943 transport->tcp_offset += used;
944 if (used != len)
945 return;
946 transport->tcp_flags &= ~TCP_RCV_READ_CALLDIR;
947
948
949
950
951 switch (ntohl(transport->tcp_calldir)) {
952 case RPC_REPLY:
953 transport->tcp_flags |= TCP_RCV_COPY_CALLDIR;
954 transport->tcp_flags |= TCP_RCV_COPY_DATA;
955 transport->tcp_flags |= TCP_RPC_REPLY;
956 break;
957 case RPC_CALL:
958 transport->tcp_flags |= TCP_RCV_COPY_CALLDIR;
959 transport->tcp_flags |= TCP_RCV_COPY_DATA;
960 transport->tcp_flags &= ~TCP_RPC_REPLY;
961 break;
962 default:
963 dprintk("RPC: invalid request message type\n");
964 xprt_force_disconnect(&transport->xprt);
965 }
966 xs_tcp_check_fraghdr(transport);
967}
968
969static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
970 struct xdr_skb_reader *desc,
971 struct rpc_rqst *req)
972{
973 struct sock_xprt *transport =
974 container_of(xprt, struct sock_xprt, xprt);
975 struct xdr_buf *rcvbuf;
976 size_t len;
977 ssize_t r;
978
979 rcvbuf = &req->rq_private_buf;
980
981 if (transport->tcp_flags & TCP_RCV_COPY_CALLDIR) {
982
983
984
985 memcpy(rcvbuf->head[0].iov_base + transport->tcp_copied,
986 &transport->tcp_calldir,
987 sizeof(transport->tcp_calldir));
988 transport->tcp_copied += sizeof(transport->tcp_calldir);
989 transport->tcp_flags &= ~TCP_RCV_COPY_CALLDIR;
990 }
991
992 len = desc->count;
993 if (len > transport->tcp_reclen - transport->tcp_offset) {
994 struct xdr_skb_reader my_desc;
995
996 len = transport->tcp_reclen - transport->tcp_offset;
997 memcpy(&my_desc, desc, sizeof(my_desc));
998 my_desc.count = len;
999 r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
1000 &my_desc, xdr_skb_read_bits);
1001 desc->count -= r;
1002 desc->offset += r;
1003 } else
1004 r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
1005 desc, xdr_skb_read_bits);
1006
1007 if (r > 0) {
1008 transport->tcp_copied += r;
1009 transport->tcp_offset += r;
1010 }
1011 if (r != len) {
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021 transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
1022 dprintk("RPC: XID %08x truncated request\n",
1023 ntohl(transport->tcp_xid));
1024 dprintk("RPC: xprt = %p, tcp_copied = %lu, "
1025 "tcp_offset = %u, tcp_reclen = %u\n",
1026 xprt, transport->tcp_copied,
1027 transport->tcp_offset, transport->tcp_reclen);
1028 return;
1029 }
1030
1031 dprintk("RPC: XID %08x read %Zd bytes\n",
1032 ntohl(transport->tcp_xid), r);
1033 dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, "
1034 "tcp_reclen = %u\n", xprt, transport->tcp_copied,
1035 transport->tcp_offset, transport->tcp_reclen);
1036
1037 if (transport->tcp_copied == req->rq_private_buf.buflen)
1038 transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
1039 else if (transport->tcp_offset == transport->tcp_reclen) {
1040 if (transport->tcp_flags & TCP_RCV_LAST_FRAG)
1041 transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
1042 }
1043}
1044
1045
1046
1047
1048
1049static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
1050 struct xdr_skb_reader *desc)
1051{
1052 struct sock_xprt *transport =
1053 container_of(xprt, struct sock_xprt, xprt);
1054 struct rpc_rqst *req;
1055
1056 dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid));
1057
1058
1059 spin_lock(&xprt->transport_lock);
1060 req = xprt_lookup_rqst(xprt, transport->tcp_xid);
1061 if (!req) {
1062 dprintk("RPC: XID %08x request not found!\n",
1063 ntohl(transport->tcp_xid));
1064 spin_unlock(&xprt->transport_lock);
1065 return -1;
1066 }
1067
1068 xs_tcp_read_common(xprt, desc, req);
1069
1070 if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
1071 xprt_complete_rqst(req->rq_task, transport->tcp_copied);
1072
1073 spin_unlock(&xprt->transport_lock);
1074 return 0;
1075}
1076
1077#if defined(CONFIG_NFS_V4_1)
1078
1079
1080
1081
1082
1083
1084
1085static inline int xs_tcp_read_callback(struct rpc_xprt *xprt,
1086 struct xdr_skb_reader *desc)
1087{
1088 struct sock_xprt *transport =
1089 container_of(xprt, struct sock_xprt, xprt);
1090 struct rpc_rqst *req;
1091
1092 req = xprt_alloc_bc_request(xprt);
1093 if (req == NULL) {
1094 printk(KERN_WARNING "Callback slot table overflowed\n");
1095 xprt_force_disconnect(xprt);
1096 return -1;
1097 }
1098
1099 req->rq_xid = transport->tcp_xid;
1100 dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid));
1101 xs_tcp_read_common(xprt, desc, req);
1102
1103 if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) {
1104 struct svc_serv *bc_serv = xprt->bc_serv;
1105
1106
1107
1108
1109
1110
1111
1112 dprintk("RPC: add callback request to list\n");
1113 spin_lock(&bc_serv->sv_cb_lock);
1114 list_add(&req->rq_bc_list, &bc_serv->sv_cb_list);
1115 spin_unlock(&bc_serv->sv_cb_lock);
1116 wake_up(&bc_serv->sv_cb_waitq);
1117 }
1118
1119 req->rq_private_buf.len = transport->tcp_copied;
1120
1121 return 0;
1122}
1123
1124static inline int _xs_tcp_read_data(struct rpc_xprt *xprt,
1125 struct xdr_skb_reader *desc)
1126{
1127 struct sock_xprt *transport =
1128 container_of(xprt, struct sock_xprt, xprt);
1129
1130 return (transport->tcp_flags & TCP_RPC_REPLY) ?
1131 xs_tcp_read_reply(xprt, desc) :
1132 xs_tcp_read_callback(xprt, desc);
1133}
1134#else
1135static inline int _xs_tcp_read_data(struct rpc_xprt *xprt,
1136 struct xdr_skb_reader *desc)
1137{
1138 return xs_tcp_read_reply(xprt, desc);
1139}
1140#endif
1141
1142
1143
1144
1145
1146static void xs_tcp_read_data(struct rpc_xprt *xprt,
1147 struct xdr_skb_reader *desc)
1148{
1149 struct sock_xprt *transport =
1150 container_of(xprt, struct sock_xprt, xprt);
1151
1152 if (_xs_tcp_read_data(xprt, desc) == 0)
1153 xs_tcp_check_fraghdr(transport);
1154 else {
1155
1156
1157
1158
1159 transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
1160 }
1161}
1162
1163static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc)
1164{
1165 size_t len;
1166
1167 len = transport->tcp_reclen - transport->tcp_offset;
1168 if (len > desc->count)
1169 len = desc->count;
1170 desc->count -= len;
1171 desc->offset += len;
1172 transport->tcp_offset += len;
1173 dprintk("RPC: discarded %Zu bytes\n", len);
1174 xs_tcp_check_fraghdr(transport);
1175}
1176
1177static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, unsigned int offset, size_t len)
1178{
1179 struct rpc_xprt *xprt = rd_desc->arg.data;
1180 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1181 struct xdr_skb_reader desc = {
1182 .skb = skb,
1183 .offset = offset,
1184 .count = len,
1185 };
1186
1187 dprintk("RPC: xs_tcp_data_recv started\n");
1188 do {
1189
1190
1191 if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) {
1192 xs_tcp_read_fraghdr(xprt, &desc);
1193 continue;
1194 }
1195
1196 if (transport->tcp_flags & TCP_RCV_COPY_XID) {
1197 xs_tcp_read_xid(transport, &desc);
1198 continue;
1199 }
1200
1201 if (transport->tcp_flags & TCP_RCV_READ_CALLDIR) {
1202 xs_tcp_read_calldir(transport, &desc);
1203 continue;
1204 }
1205
1206 if (transport->tcp_flags & TCP_RCV_COPY_DATA) {
1207 xs_tcp_read_data(xprt, &desc);
1208 continue;
1209 }
1210
1211 xs_tcp_read_discard(transport, &desc);
1212 } while (desc.count);
1213 dprintk("RPC: xs_tcp_data_recv done\n");
1214 return len - desc.count;
1215}
1216
1217
1218
1219
1220
1221
1222
1223static void xs_tcp_data_ready(struct sock *sk, int bytes)
1224{
1225 struct rpc_xprt *xprt;
1226 read_descriptor_t rd_desc;
1227 int read;
1228
1229 dprintk("RPC: xs_tcp_data_ready...\n");
1230
1231 read_lock_bh(&sk->sk_callback_lock);
1232 if (!(xprt = xprt_from_sock(sk)))
1233 goto out;
1234 if (xprt->shutdown)
1235 goto out;
1236
1237
1238
1239
1240 if (xprt->reestablish_timeout)
1241 xprt->reestablish_timeout = 0;
1242
1243
1244 rd_desc.arg.data = xprt;
1245 do {
1246 rd_desc.count = 65536;
1247 read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
1248 } while (read > 0);
1249out:
1250 read_unlock_bh(&sk->sk_callback_lock);
1251}
1252
1253
1254
1255
1256
1257
1258static void xs_tcp_schedule_linger_timeout(struct rpc_xprt *xprt,
1259 unsigned long timeout)
1260{
1261 struct sock_xprt *transport;
1262
1263 if (xprt_test_and_set_connecting(xprt))
1264 return;
1265 set_bit(XPRT_CONNECTION_ABORT, &xprt->state);
1266 transport = container_of(xprt, struct sock_xprt, xprt);
1267 queue_delayed_work(rpciod_workqueue, &transport->connect_worker,
1268 timeout);
1269}
1270
1271static void xs_tcp_cancel_linger_timeout(struct rpc_xprt *xprt)
1272{
1273 struct sock_xprt *transport;
1274
1275 transport = container_of(xprt, struct sock_xprt, xprt);
1276
1277 if (!test_bit(XPRT_CONNECTION_ABORT, &xprt->state) ||
1278 !cancel_delayed_work(&transport->connect_worker))
1279 return;
1280 clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
1281 xprt_clear_connecting(xprt);
1282}
1283
1284static void xs_sock_mark_closed(struct rpc_xprt *xprt)
1285{
1286 smp_mb__before_clear_bit();
1287 clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
1288 clear_bit(XPRT_CLOSING, &xprt->state);
1289 smp_mb__after_clear_bit();
1290
1291 xprt_disconnect_done(xprt);
1292}
1293
1294
1295
1296
1297
1298
1299static void xs_tcp_state_change(struct sock *sk)
1300{
1301 struct rpc_xprt *xprt;
1302
1303 read_lock_bh(&sk->sk_callback_lock);
1304 if (!(xprt = xprt_from_sock(sk)))
1305 goto out;
1306 dprintk("RPC: xs_tcp_state_change client %p...\n", xprt);
1307 dprintk("RPC: state %x conn %d dead %d zapped %d sk_shutdown %d\n",
1308 sk->sk_state, xprt_connected(xprt),
1309 sock_flag(sk, SOCK_DEAD),
1310 sock_flag(sk, SOCK_ZAPPED),
1311 sk->sk_shutdown);
1312
1313 switch (sk->sk_state) {
1314 case TCP_ESTABLISHED:
1315 spin_lock(&xprt->transport_lock);
1316 if (!xprt_test_and_set_connected(xprt)) {
1317 struct sock_xprt *transport = container_of(xprt,
1318 struct sock_xprt, xprt);
1319
1320
1321 transport->tcp_offset = 0;
1322 transport->tcp_reclen = 0;
1323 transport->tcp_copied = 0;
1324 transport->tcp_flags =
1325 TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID;
1326
1327 xprt_wake_pending_tasks(xprt, -EAGAIN);
1328 }
1329 spin_unlock(&xprt->transport_lock);
1330 break;
1331 case TCP_FIN_WAIT1:
1332
1333 xprt->connect_cookie++;
1334 xprt->reestablish_timeout = 0;
1335 set_bit(XPRT_CLOSING, &xprt->state);
1336 smp_mb__before_clear_bit();
1337 clear_bit(XPRT_CONNECTED, &xprt->state);
1338 clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
1339 smp_mb__after_clear_bit();
1340 xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout);
1341 break;
1342 case TCP_CLOSE_WAIT:
1343
1344 xprt_force_disconnect(xprt);
1345 case TCP_SYN_SENT:
1346 xprt->connect_cookie++;
1347 case TCP_CLOSING:
1348
1349
1350
1351
1352 if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
1353 xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
1354 break;
1355 case TCP_LAST_ACK:
1356 set_bit(XPRT_CLOSING, &xprt->state);
1357 xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout);
1358 smp_mb__before_clear_bit();
1359 clear_bit(XPRT_CONNECTED, &xprt->state);
1360 smp_mb__after_clear_bit();
1361 break;
1362 case TCP_CLOSE:
1363 xs_tcp_cancel_linger_timeout(xprt);
1364 xs_sock_mark_closed(xprt);
1365 }
1366 out:
1367 read_unlock_bh(&sk->sk_callback_lock);
1368}
1369
1370
1371
1372
1373
1374static void xs_error_report(struct sock *sk)
1375{
1376 struct rpc_xprt *xprt;
1377
1378 read_lock_bh(&sk->sk_callback_lock);
1379 if (!(xprt = xprt_from_sock(sk)))
1380 goto out;
1381 dprintk("RPC: %s client %p...\n"
1382 "RPC: error %d\n",
1383 __func__, xprt, sk->sk_err);
1384 xprt_wake_pending_tasks(xprt, -EAGAIN);
1385out:
1386 read_unlock_bh(&sk->sk_callback_lock);
1387}
1388
1389static void xs_write_space(struct sock *sk)
1390{
1391 struct socket *sock;
1392 struct rpc_xprt *xprt;
1393
1394 if (unlikely(!(sock = sk->sk_socket)))
1395 return;
1396 clear_bit(SOCK_NOSPACE, &sock->flags);
1397
1398 if (unlikely(!(xprt = xprt_from_sock(sk))))
1399 return;
1400 if (test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags) == 0)
1401 return;
1402
1403 xprt_write_space(xprt);
1404}
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416static void xs_udp_write_space(struct sock *sk)
1417{
1418 read_lock_bh(&sk->sk_callback_lock);
1419
1420
1421 if (sock_writeable(sk))
1422 xs_write_space(sk);
1423
1424 read_unlock_bh(&sk->sk_callback_lock);
1425}
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437static void xs_tcp_write_space(struct sock *sk)
1438{
1439 read_lock_bh(&sk->sk_callback_lock);
1440
1441
1442 if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
1443 xs_write_space(sk);
1444
1445 read_unlock_bh(&sk->sk_callback_lock);
1446}
1447
1448static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt)
1449{
1450 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1451 struct sock *sk = transport->inet;
1452
1453 if (transport->rcvsize) {
1454 sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
1455 sk->sk_rcvbuf = transport->rcvsize * xprt->max_reqs * 2;
1456 }
1457 if (transport->sndsize) {
1458 sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
1459 sk->sk_sndbuf = transport->sndsize * xprt->max_reqs * 2;
1460 sk->sk_write_space(sk);
1461 }
1462}
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize)
1473{
1474 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1475
1476 transport->sndsize = 0;
1477 if (sndsize)
1478 transport->sndsize = sndsize + 1024;
1479 transport->rcvsize = 0;
1480 if (rcvsize)
1481 transport->rcvsize = rcvsize + 1024;
1482
1483 xs_udp_do_set_buffer_size(xprt);
1484}
1485
1486
1487
1488
1489
1490
1491
1492static void xs_udp_timer(struct rpc_task *task)
1493{
1494 xprt_adjust_cwnd(task, -ETIMEDOUT);
1495}
1496
1497static unsigned short xs_get_random_port(void)
1498{
1499 unsigned short range = xprt_max_resvport - xprt_min_resvport;
1500 unsigned short rand = (unsigned short) net_random() % range;
1501 return rand + xprt_min_resvport;
1502}
1503
1504
1505
1506
1507
1508
1509
1510static void xs_set_port(struct rpc_xprt *xprt, unsigned short port)
1511{
1512 dprintk("RPC: setting port for xprt %p to %u\n", xprt, port);
1513
1514 rpc_set_port(xs_addr(xprt), port);
1515 xs_update_peer_port(xprt);
1516}
1517
1518static unsigned short xs_get_srcport(struct sock_xprt *transport)
1519{
1520 unsigned short port = transport->srcport;
1521
1522 if (port == 0 && transport->xprt.resvport)
1523 port = xs_get_random_port();
1524 return port;
1525}
1526
1527static unsigned short xs_next_srcport(struct sock_xprt *transport, unsigned short port)
1528{
1529 if (transport->srcport != 0)
1530 transport->srcport = 0;
1531 if (!transport->xprt.resvport)
1532 return 0;
1533 if (port <= xprt_min_resvport || port > xprt_max_resvport)
1534 return xprt_max_resvport;
1535 return --port;
1536}
1537static int xs_bind(struct sock_xprt *transport, struct socket *sock)
1538{
1539 struct sockaddr_storage myaddr;
1540 int err, nloop = 0;
1541 unsigned short port = xs_get_srcport(transport);
1542 unsigned short last;
1543
1544 memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen);
1545 do {
1546 rpc_set_port((struct sockaddr *)&myaddr, port);
1547 err = kernel_bind(sock, (struct sockaddr *)&myaddr,
1548 transport->xprt.addrlen);
1549 if (port == 0)
1550 break;
1551 if (err == 0) {
1552 transport->srcport = port;
1553 break;
1554 }
1555 last = port;
1556 port = xs_next_srcport(transport, port);
1557 if (port > last)
1558 nloop++;
1559 } while (err == -EADDRINUSE && nloop != 2);
1560
1561 if (myaddr.ss_family == AF_INET)
1562 dprintk("RPC: %s %pI4:%u: %s (%d)\n", __func__,
1563 &((struct sockaddr_in *)&myaddr)->sin_addr,
1564 port, err ? "failed" : "ok", err);
1565 else
1566 dprintk("RPC: %s %pI6:%u: %s (%d)\n", __func__,
1567 &((struct sockaddr_in6 *)&myaddr)->sin6_addr,
1568 port, err ? "failed" : "ok", err);
1569 return err;
1570}
1571
1572
1573#ifdef CONFIG_DEBUG_LOCK_ALLOC
1574static struct lock_class_key xs_key[2];
1575static struct lock_class_key xs_slock_key[2];
1576
1577static inline void xs_reclassify_socket4(struct socket *sock)
1578{
1579 struct sock *sk = sock->sk;
1580
1581 BUG_ON(sock_owned_by_user(sk));
1582 sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC",
1583 &xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]);
1584}
1585
1586static inline void xs_reclassify_socket6(struct socket *sock)
1587{
1588 struct sock *sk = sock->sk;
1589
1590 BUG_ON(sock_owned_by_user(sk));
1591 sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC",
1592 &xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]);
1593}
1594
1595static inline void xs_reclassify_socket(int family, struct socket *sock)
1596{
1597 switch (family) {
1598 case AF_INET:
1599 xs_reclassify_socket4(sock);
1600 break;
1601 case AF_INET6:
1602 xs_reclassify_socket6(sock);
1603 break;
1604 }
1605}
1606#else
1607static inline void xs_reclassify_socket4(struct socket *sock)
1608{
1609}
1610
1611static inline void xs_reclassify_socket6(struct socket *sock)
1612{
1613}
1614
1615static inline void xs_reclassify_socket(int family, struct socket *sock)
1616{
1617}
1618#endif
1619
1620static struct socket *xs_create_sock(struct rpc_xprt *xprt,
1621 struct sock_xprt *transport, int family, int type, int protocol)
1622{
1623 struct socket *sock;
1624 int err;
1625
1626 err = __sock_create(xprt->xprt_net, family, type, protocol, &sock, 1);
1627 if (err < 0) {
1628 dprintk("RPC: can't create %d transport socket (%d).\n",
1629 protocol, -err);
1630 goto out;
1631 }
1632 xs_reclassify_socket(family, sock);
1633
1634 err = xs_bind(transport, sock);
1635 if (err) {
1636 sock_release(sock);
1637 goto out;
1638 }
1639
1640 return sock;
1641out:
1642 return ERR_PTR(err);
1643}
1644
1645static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
1646{
1647 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1648
1649 if (!transport->inet) {
1650 struct sock *sk = sock->sk;
1651
1652 write_lock_bh(&sk->sk_callback_lock);
1653
1654 xs_save_old_callbacks(transport, sk);
1655
1656 sk->sk_user_data = xprt;
1657 sk->sk_data_ready = xs_udp_data_ready;
1658 sk->sk_write_space = xs_udp_write_space;
1659 sk->sk_error_report = xs_error_report;
1660 sk->sk_no_check = UDP_CSUM_NORCV;
1661 sk->sk_allocation = GFP_ATOMIC;
1662
1663 xprt_set_connected(xprt);
1664
1665
1666 transport->sock = sock;
1667 transport->inet = sk;
1668
1669 write_unlock_bh(&sk->sk_callback_lock);
1670 }
1671 xs_udp_do_set_buffer_size(xprt);
1672}
1673
1674static void xs_udp_setup_socket(struct work_struct *work)
1675{
1676 struct sock_xprt *transport =
1677 container_of(work, struct sock_xprt, connect_worker.work);
1678 struct rpc_xprt *xprt = &transport->xprt;
1679 struct socket *sock = transport->sock;
1680 int status = -EIO;
1681
1682 if (xprt->shutdown)
1683 goto out;
1684
1685
1686 xs_reset_transport(transport);
1687 sock = xs_create_sock(xprt, transport,
1688 xs_addr(xprt)->sa_family, SOCK_DGRAM, IPPROTO_UDP);
1689 if (IS_ERR(sock))
1690 goto out;
1691
1692 dprintk("RPC: worker connecting xprt %p via %s to "
1693 "%s (port %s)\n", xprt,
1694 xprt->address_strings[RPC_DISPLAY_PROTO],
1695 xprt->address_strings[RPC_DISPLAY_ADDR],
1696 xprt->address_strings[RPC_DISPLAY_PORT]);
1697
1698 xs_udp_finish_connecting(xprt, sock);
1699 status = 0;
1700out:
1701 xprt_clear_connecting(xprt);
1702 xprt_wake_pending_tasks(xprt, status);
1703}
1704
1705
1706
1707
1708
1709static void xs_abort_connection(struct sock_xprt *transport)
1710{
1711 int result;
1712 struct sockaddr any;
1713
1714 dprintk("RPC: disconnecting xprt %p to reuse port\n", transport);
1715
1716
1717
1718
1719
1720 memset(&any, 0, sizeof(any));
1721 any.sa_family = AF_UNSPEC;
1722 result = kernel_connect(transport->sock, &any, sizeof(any), 0);
1723 if (!result)
1724 xs_sock_mark_closed(&transport->xprt);
1725 else
1726 dprintk("RPC: AF_UNSPEC connect return code %d\n",
1727 result);
1728}
1729
1730static void xs_tcp_reuse_connection(struct sock_xprt *transport)
1731{
1732 unsigned int state = transport->inet->sk_state;
1733
1734 if (state == TCP_CLOSE && transport->sock->state == SS_UNCONNECTED) {
1735
1736
1737
1738 if (transport->inet->sk_shutdown == 0)
1739 return;
1740 dprintk("RPC: %s: TCP_CLOSEd and sk_shutdown set to %d\n",
1741 __func__, transport->inet->sk_shutdown);
1742 }
1743 if ((1 << state) & (TCPF_ESTABLISHED|TCPF_SYN_SENT)) {
1744
1745
1746
1747 if (transport->inet->sk_shutdown == 0)
1748 return;
1749 dprintk("RPC: %s: ESTABLISHED/SYN_SENT "
1750 "sk_shutdown set to %d\n",
1751 __func__, transport->inet->sk_shutdown);
1752 }
1753 xs_abort_connection(transport);
1754}
1755
1756static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
1757{
1758 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1759
1760 if (!transport->inet) {
1761 struct sock *sk = sock->sk;
1762
1763 write_lock_bh(&sk->sk_callback_lock);
1764
1765 xs_save_old_callbacks(transport, sk);
1766
1767 sk->sk_user_data = xprt;
1768 sk->sk_data_ready = xs_tcp_data_ready;
1769 sk->sk_state_change = xs_tcp_state_change;
1770 sk->sk_write_space = xs_tcp_write_space;
1771 sk->sk_error_report = xs_error_report;
1772 sk->sk_allocation = GFP_ATOMIC;
1773
1774
1775 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
1776 sock_reset_flag(sk, SOCK_LINGER);
1777 tcp_sk(sk)->linger2 = 0;
1778 tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF;
1779
1780 xprt_clear_connected(xprt);
1781
1782
1783 transport->sock = sock;
1784 transport->inet = sk;
1785
1786 write_unlock_bh(&sk->sk_callback_lock);
1787 }
1788
1789 if (!xprt_bound(xprt))
1790 return -ENOTCONN;
1791
1792
1793 xprt->stat.connect_count++;
1794 xprt->stat.connect_start = jiffies;
1795 return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK);
1796}
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806static void xs_tcp_setup_socket(struct work_struct *work)
1807{
1808 struct sock_xprt *transport =
1809 container_of(work, struct sock_xprt, connect_worker.work);
1810 struct socket *sock = transport->sock;
1811 struct rpc_xprt *xprt = &transport->xprt;
1812 int status = -EIO;
1813
1814 if (xprt->shutdown)
1815 goto out;
1816
1817 if (!sock) {
1818 clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
1819 sock = xs_create_sock(xprt, transport,
1820 xs_addr(xprt)->sa_family, SOCK_STREAM, IPPROTO_TCP);
1821 if (IS_ERR(sock)) {
1822 status = PTR_ERR(sock);
1823 goto out;
1824 }
1825 } else {
1826 int abort_and_exit;
1827
1828 abort_and_exit = test_and_clear_bit(XPRT_CONNECTION_ABORT,
1829 &xprt->state);
1830
1831 xs_tcp_reuse_connection(transport);
1832
1833 if (abort_and_exit)
1834 goto out_eagain;
1835 }
1836
1837 dprintk("RPC: worker connecting xprt %p via %s to "
1838 "%s (port %s)\n", xprt,
1839 xprt->address_strings[RPC_DISPLAY_PROTO],
1840 xprt->address_strings[RPC_DISPLAY_ADDR],
1841 xprt->address_strings[RPC_DISPLAY_PORT]);
1842
1843 status = xs_tcp_finish_connecting(xprt, sock);
1844 dprintk("RPC: %p connect status %d connected %d sock state %d\n",
1845 xprt, -status, xprt_connected(xprt),
1846 sock->sk->sk_state);
1847 switch (status) {
1848 default:
1849 printk("%s: connect returned unhandled error %d\n",
1850 __func__, status);
1851 case -EADDRNOTAVAIL:
1852
1853
1854
1855 set_bit(XPRT_CONNECTION_CLOSE, &xprt->state);
1856 xprt_force_disconnect(xprt);
1857 break;
1858 case -ECONNREFUSED:
1859 case -ECONNRESET:
1860 case -ENETUNREACH:
1861
1862 case 0:
1863 case -EINPROGRESS:
1864 case -EALREADY:
1865 xprt_clear_connecting(xprt);
1866 return;
1867 case -EINVAL:
1868
1869
1870
1871 goto out;
1872 }
1873out_eagain:
1874 status = -EAGAIN;
1875out:
1876 xprt_clear_connecting(xprt);
1877 xprt_wake_pending_tasks(xprt, status);
1878}
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893static void xs_connect(struct rpc_task *task)
1894{
1895 struct rpc_xprt *xprt = task->tk_xprt;
1896 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1897
1898 if (transport->sock != NULL && !RPC_IS_SOFTCONN(task)) {
1899 dprintk("RPC: xs_connect delayed xprt %p for %lu "
1900 "seconds\n",
1901 xprt, xprt->reestablish_timeout / HZ);
1902 queue_delayed_work(rpciod_workqueue,
1903 &transport->connect_worker,
1904 xprt->reestablish_timeout);
1905 xprt->reestablish_timeout <<= 1;
1906 if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
1907 xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
1908 if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO)
1909 xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO;
1910 } else {
1911 dprintk("RPC: xs_connect scheduled xprt %p\n", xprt);
1912 queue_delayed_work(rpciod_workqueue,
1913 &transport->connect_worker, 0);
1914 }
1915}
1916
1917
1918
1919
1920
1921
1922
1923static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
1924{
1925 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1926
1927 seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %Lu %Lu\n",
1928 transport->srcport,
1929 xprt->stat.bind_count,
1930 xprt->stat.sends,
1931 xprt->stat.recvs,
1932 xprt->stat.bad_xids,
1933 xprt->stat.req_u,
1934 xprt->stat.bklog_u);
1935}
1936
1937
1938
1939
1940
1941
1942
1943static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
1944{
1945 struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
1946 long idle_time = 0;
1947
1948 if (xprt_connected(xprt))
1949 idle_time = (long)(jiffies - xprt->last_used) / HZ;
1950
1951 seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu\n",
1952 transport->srcport,
1953 xprt->stat.bind_count,
1954 xprt->stat.connect_count,
1955 xprt->stat.connect_time,
1956 idle_time,
1957 xprt->stat.sends,
1958 xprt->stat.recvs,
1959 xprt->stat.bad_xids,
1960 xprt->stat.req_u,
1961 xprt->stat.bklog_u);
1962}
1963
1964
1965
1966
1967
1968
1969static void *bc_malloc(struct rpc_task *task, size_t size)
1970{
1971 struct page *page;
1972 struct rpc_buffer *buf;
1973
1974 BUG_ON(size > PAGE_SIZE - sizeof(struct rpc_buffer));
1975 page = alloc_page(GFP_KERNEL);
1976
1977 if (!page)
1978 return NULL;
1979
1980 buf = page_address(page);
1981 buf->len = PAGE_SIZE;
1982
1983 return buf->data;
1984}
1985
1986
1987
1988
1989static void bc_free(void *buffer)
1990{
1991 struct rpc_buffer *buf;
1992
1993 if (!buffer)
1994 return;
1995
1996 buf = container_of(buffer, struct rpc_buffer, data);
1997 free_page((unsigned long)buf);
1998}
1999
2000
2001
2002
2003
2004static int bc_sendto(struct rpc_rqst *req)
2005{
2006 int len;
2007 struct xdr_buf *xbufp = &req->rq_snd_buf;
2008 struct rpc_xprt *xprt = req->rq_xprt;
2009 struct sock_xprt *transport =
2010 container_of(xprt, struct sock_xprt, xprt);
2011 struct socket *sock = transport->sock;
2012 unsigned long headoff;
2013 unsigned long tailoff;
2014
2015
2016
2017
2018 xs_encode_tcp_record_marker(xbufp);
2019
2020 tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK;
2021 headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK;
2022 len = svc_send_common(sock, xbufp,
2023 virt_to_page(xbufp->head[0].iov_base), headoff,
2024 xbufp->tail[0].iov_base, tailoff);
2025
2026 if (len != xbufp->len) {
2027 printk(KERN_NOTICE "Error sending entire callback!\n");
2028 len = -EAGAIN;
2029 }
2030
2031 return len;
2032}
2033
2034
2035
2036
2037static int bc_send_request(struct rpc_task *task)
2038{
2039 struct rpc_rqst *req = task->tk_rqstp;
2040 struct svc_xprt *xprt;
2041 struct svc_sock *svsk;
2042 u32 len;
2043
2044 dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid));
2045
2046
2047
2048 xprt = req->rq_xprt->bc_xprt;
2049 svsk = container_of(xprt, struct svc_sock, sk_xprt);
2050
2051
2052
2053
2054
2055 if (!mutex_trylock(&xprt->xpt_mutex)) {
2056 rpc_sleep_on(&xprt->xpt_bc_pending, task, NULL);
2057 if (!mutex_trylock(&xprt->xpt_mutex))
2058 return -EAGAIN;
2059 rpc_wake_up_queued_task(&xprt->xpt_bc_pending, task);
2060 }
2061 if (test_bit(XPT_DEAD, &xprt->xpt_flags))
2062 len = -ENOTCONN;
2063 else
2064 len = bc_sendto(req);
2065 mutex_unlock(&xprt->xpt_mutex);
2066
2067 if (len > 0)
2068 len = 0;
2069
2070 return len;
2071}
2072
2073
2074
2075
2076
2077static void bc_close(struct rpc_xprt *xprt)
2078{
2079}
2080
2081
2082
2083
2084
2085
2086static void bc_destroy(struct rpc_xprt *xprt)
2087{
2088}
2089
2090static struct rpc_xprt_ops xs_udp_ops = {
2091 .set_buffer_size = xs_udp_set_buffer_size,
2092 .reserve_xprt = xprt_reserve_xprt_cong,
2093 .release_xprt = xprt_release_xprt_cong,
2094 .rpcbind = rpcb_getport_async,
2095 .set_port = xs_set_port,
2096 .connect = xs_connect,
2097 .buf_alloc = rpc_malloc,
2098 .buf_free = rpc_free,
2099 .send_request = xs_udp_send_request,
2100 .set_retrans_timeout = xprt_set_retrans_timeout_rtt,
2101 .timer = xs_udp_timer,
2102 .release_request = xprt_release_rqst_cong,
2103 .close = xs_close,
2104 .destroy = xs_destroy,
2105 .print_stats = xs_udp_print_stats,
2106};
2107
2108static struct rpc_xprt_ops xs_tcp_ops = {
2109 .reserve_xprt = xprt_reserve_xprt,
2110 .release_xprt = xs_tcp_release_xprt,
2111 .rpcbind = rpcb_getport_async,
2112 .set_port = xs_set_port,
2113 .connect = xs_connect,
2114 .buf_alloc = rpc_malloc,
2115 .buf_free = rpc_free,
2116 .send_request = xs_tcp_send_request,
2117 .set_retrans_timeout = xprt_set_retrans_timeout_def,
2118 .close = xs_tcp_close,
2119 .destroy = xs_destroy,
2120 .print_stats = xs_tcp_print_stats,
2121};
2122
2123
2124
2125
2126
2127static struct rpc_xprt_ops bc_tcp_ops = {
2128 .reserve_xprt = xprt_reserve_xprt,
2129 .release_xprt = xprt_release_xprt,
2130 .buf_alloc = bc_malloc,
2131 .buf_free = bc_free,
2132 .send_request = bc_send_request,
2133 .set_retrans_timeout = xprt_set_retrans_timeout_def,
2134 .close = bc_close,
2135 .destroy = bc_destroy,
2136 .print_stats = xs_tcp_print_stats,
2137};
2138
2139static int xs_init_anyaddr(const int family, struct sockaddr *sap)
2140{
2141 static const struct sockaddr_in sin = {
2142 .sin_family = AF_INET,
2143 .sin_addr.s_addr = htonl(INADDR_ANY),
2144 };
2145 static const struct sockaddr_in6 sin6 = {
2146 .sin6_family = AF_INET6,
2147 .sin6_addr = IN6ADDR_ANY_INIT,
2148 };
2149
2150 switch (family) {
2151 case AF_INET:
2152 memcpy(sap, &sin, sizeof(sin));
2153 break;
2154 case AF_INET6:
2155 memcpy(sap, &sin6, sizeof(sin6));
2156 break;
2157 default:
2158 dprintk("RPC: %s: Bad address family\n", __func__);
2159 return -EAFNOSUPPORT;
2160 }
2161 return 0;
2162}
2163
2164static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
2165 unsigned int slot_table_size)
2166{
2167 struct rpc_xprt *xprt;
2168 struct sock_xprt *new;
2169
2170 if (args->addrlen > sizeof(xprt->addr)) {
2171 dprintk("RPC: xs_setup_xprt: address too large\n");
2172 return ERR_PTR(-EBADF);
2173 }
2174
2175 xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size);
2176 if (xprt == NULL) {
2177 dprintk("RPC: xs_setup_xprt: couldn't allocate "
2178 "rpc_xprt\n");
2179 return ERR_PTR(-ENOMEM);
2180 }
2181
2182 new = container_of(xprt, struct sock_xprt, xprt);
2183 memcpy(&xprt->addr, args->dstaddr, args->addrlen);
2184 xprt->addrlen = args->addrlen;
2185 if (args->srcaddr)
2186 memcpy(&new->srcaddr, args->srcaddr, args->addrlen);
2187 else {
2188 int err;
2189 err = xs_init_anyaddr(args->dstaddr->sa_family,
2190 (struct sockaddr *)&new->srcaddr);
2191 if (err != 0)
2192 return ERR_PTR(err);
2193 }
2194
2195 return xprt;
2196}
2197
2198static const struct rpc_timeout xs_udp_default_timeout = {
2199 .to_initval = 5 * HZ,
2200 .to_maxval = 30 * HZ,
2201 .to_increment = 5 * HZ,
2202 .to_retries = 5,
2203};
2204
2205
2206
2207
2208
2209
2210static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
2211{
2212 struct sockaddr *addr = args->dstaddr;
2213 struct rpc_xprt *xprt;
2214 struct sock_xprt *transport;
2215 struct rpc_xprt *ret;
2216
2217 xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries);
2218 if (IS_ERR(xprt))
2219 return xprt;
2220 transport = container_of(xprt, struct sock_xprt, xprt);
2221
2222 xprt->prot = IPPROTO_UDP;
2223 xprt->tsh_size = 0;
2224
2225 xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
2226
2227 xprt->bind_timeout = XS_BIND_TO;
2228 xprt->reestablish_timeout = XS_UDP_REEST_TO;
2229 xprt->idle_timeout = XS_IDLE_DISC_TO;
2230
2231 xprt->ops = &xs_udp_ops;
2232
2233 xprt->timeout = &xs_udp_default_timeout;
2234
2235 switch (addr->sa_family) {
2236 case AF_INET:
2237 if (((struct sockaddr_in *)addr)->sin_port != htons(0))
2238 xprt_set_bound(xprt);
2239
2240 INIT_DELAYED_WORK(&transport->connect_worker,
2241 xs_udp_setup_socket);
2242 xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP);
2243 break;
2244 case AF_INET6:
2245 if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0))
2246 xprt_set_bound(xprt);
2247
2248 INIT_DELAYED_WORK(&transport->connect_worker,
2249 xs_udp_setup_socket);
2250 xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP6);
2251 break;
2252 default:
2253 ret = ERR_PTR(-EAFNOSUPPORT);
2254 goto out_err;
2255 }
2256
2257 if (xprt_bound(xprt))
2258 dprintk("RPC: set up xprt to %s (port %s) via %s\n",
2259 xprt->address_strings[RPC_DISPLAY_ADDR],
2260 xprt->address_strings[RPC_DISPLAY_PORT],
2261 xprt->address_strings[RPC_DISPLAY_PROTO]);
2262 else
2263 dprintk("RPC: set up xprt to %s (autobind) via %s\n",
2264 xprt->address_strings[RPC_DISPLAY_ADDR],
2265 xprt->address_strings[RPC_DISPLAY_PROTO]);
2266
2267 if (try_module_get(THIS_MODULE))
2268 return xprt;
2269 ret = ERR_PTR(-EINVAL);
2270out_err:
2271 xprt_free(xprt);
2272 return ret;
2273}
2274
2275static const struct rpc_timeout xs_tcp_default_timeout = {
2276 .to_initval = 60 * HZ,
2277 .to_maxval = 60 * HZ,
2278 .to_retries = 2,
2279};
2280
2281
2282
2283
2284
2285
2286static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
2287{
2288 struct sockaddr *addr = args->dstaddr;
2289 struct rpc_xprt *xprt;
2290 struct sock_xprt *transport;
2291 struct rpc_xprt *ret;
2292
2293 xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
2294 if (IS_ERR(xprt))
2295 return xprt;
2296 transport = container_of(xprt, struct sock_xprt, xprt);
2297
2298 xprt->prot = IPPROTO_TCP;
2299 xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
2300 xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
2301
2302 xprt->bind_timeout = XS_BIND_TO;
2303 xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
2304 xprt->idle_timeout = XS_IDLE_DISC_TO;
2305
2306 xprt->ops = &xs_tcp_ops;
2307 xprt->timeout = &xs_tcp_default_timeout;
2308
2309 switch (addr->sa_family) {
2310 case AF_INET:
2311 if (((struct sockaddr_in *)addr)->sin_port != htons(0))
2312 xprt_set_bound(xprt);
2313
2314 INIT_DELAYED_WORK(&transport->connect_worker,
2315 xs_tcp_setup_socket);
2316 xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP);
2317 break;
2318 case AF_INET6:
2319 if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0))
2320 xprt_set_bound(xprt);
2321
2322 INIT_DELAYED_WORK(&transport->connect_worker,
2323 xs_tcp_setup_socket);
2324 xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6);
2325 break;
2326 default:
2327 ret = ERR_PTR(-EAFNOSUPPORT);
2328 goto out_err;
2329 }
2330
2331 if (xprt_bound(xprt))
2332 dprintk("RPC: set up xprt to %s (port %s) via %s\n",
2333 xprt->address_strings[RPC_DISPLAY_ADDR],
2334 xprt->address_strings[RPC_DISPLAY_PORT],
2335 xprt->address_strings[RPC_DISPLAY_PROTO]);
2336 else
2337 dprintk("RPC: set up xprt to %s (autobind) via %s\n",
2338 xprt->address_strings[RPC_DISPLAY_ADDR],
2339 xprt->address_strings[RPC_DISPLAY_PROTO]);
2340
2341
2342 if (try_module_get(THIS_MODULE))
2343 return xprt;
2344 ret = ERR_PTR(-EINVAL);
2345out_err:
2346 xprt_free(xprt);
2347 return ret;
2348}
2349
2350
2351
2352
2353
2354
2355static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
2356{
2357 struct sockaddr *addr = args->dstaddr;
2358 struct rpc_xprt *xprt;
2359 struct sock_xprt *transport;
2360 struct svc_sock *bc_sock;
2361 struct rpc_xprt *ret;
2362
2363 if (args->bc_xprt->xpt_bc_xprt) {
2364
2365
2366
2367
2368
2369
2370 return args->bc_xprt->xpt_bc_xprt;
2371 }
2372 xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
2373 if (IS_ERR(xprt))
2374 return xprt;
2375 transport = container_of(xprt, struct sock_xprt, xprt);
2376
2377 xprt->prot = IPPROTO_TCP;
2378 xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
2379 xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
2380 xprt->timeout = &xs_tcp_default_timeout;
2381
2382
2383 xprt_set_bound(xprt);
2384 xprt->bind_timeout = 0;
2385 xprt->reestablish_timeout = 0;
2386 xprt->idle_timeout = 0;
2387
2388 xprt->ops = &bc_tcp_ops;
2389
2390 switch (addr->sa_family) {
2391 case AF_INET:
2392 xs_format_peer_addresses(xprt, "tcp",
2393 RPCBIND_NETID_TCP);
2394 break;
2395 case AF_INET6:
2396 xs_format_peer_addresses(xprt, "tcp",
2397 RPCBIND_NETID_TCP6);
2398 break;
2399 default:
2400 ret = ERR_PTR(-EAFNOSUPPORT);
2401 goto out_err;
2402 }
2403
2404 dprintk("RPC: set up xprt to %s (port %s) via %s\n",
2405 xprt->address_strings[RPC_DISPLAY_ADDR],
2406 xprt->address_strings[RPC_DISPLAY_PORT],
2407 xprt->address_strings[RPC_DISPLAY_PROTO]);
2408
2409
2410
2411
2412
2413
2414
2415
2416 xprt_get(xprt);
2417 args->bc_xprt->xpt_bc_xprt = xprt;
2418 xprt->bc_xprt = args->bc_xprt;
2419 bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt);
2420 transport->sock = bc_sock->sk_sock;
2421 transport->inet = bc_sock->sk_sk;
2422
2423
2424
2425
2426
2427 xprt_set_connected(xprt);
2428
2429
2430 if (try_module_get(THIS_MODULE))
2431 return xprt;
2432 xprt_put(xprt);
2433 ret = ERR_PTR(-EINVAL);
2434out_err:
2435 xprt_free(xprt);
2436 return ret;
2437}
2438
2439static struct xprt_class xs_udp_transport = {
2440 .list = LIST_HEAD_INIT(xs_udp_transport.list),
2441 .name = "udp",
2442 .owner = THIS_MODULE,
2443 .ident = XPRT_TRANSPORT_UDP,
2444 .setup = xs_setup_udp,
2445};
2446
2447static struct xprt_class xs_tcp_transport = {
2448 .list = LIST_HEAD_INIT(xs_tcp_transport.list),
2449 .name = "tcp",
2450 .owner = THIS_MODULE,
2451 .ident = XPRT_TRANSPORT_TCP,
2452 .setup = xs_setup_tcp,
2453};
2454
2455static struct xprt_class xs_bc_tcp_transport = {
2456 .list = LIST_HEAD_INIT(xs_bc_tcp_transport.list),
2457 .name = "tcp NFSv4.1 backchannel",
2458 .owner = THIS_MODULE,
2459 .ident = XPRT_TRANSPORT_BC_TCP,
2460 .setup = xs_setup_bc_tcp,
2461};
2462
2463
2464
2465
2466
2467int init_socket_xprt(void)
2468{
2469#ifdef RPC_DEBUG
2470 if (!sunrpc_table_header)
2471 sunrpc_table_header = register_sysctl_table(sunrpc_table);
2472#endif
2473
2474 xprt_register_transport(&xs_udp_transport);
2475 xprt_register_transport(&xs_tcp_transport);
2476 xprt_register_transport(&xs_bc_tcp_transport);
2477
2478 return 0;
2479}
2480
2481
2482
2483
2484
2485void cleanup_socket_xprt(void)
2486{
2487#ifdef RPC_DEBUG
2488 if (sunrpc_table_header) {
2489 unregister_sysctl_table(sunrpc_table_header);
2490 sunrpc_table_header = NULL;
2491 }
2492#endif
2493
2494 xprt_unregister_transport(&xs_udp_transport);
2495 xprt_unregister_transport(&xs_tcp_transport);
2496 xprt_unregister_transport(&xs_bc_tcp_transport);
2497}
2498
2499static int param_set_uint_minmax(const char *val,
2500 const struct kernel_param *kp,
2501 unsigned int min, unsigned int max)
2502{
2503 unsigned long num;
2504 int ret;
2505
2506 if (!val)
2507 return -EINVAL;
2508 ret = strict_strtoul(val, 0, &num);
2509 if (ret == -EINVAL || num < min || num > max)
2510 return -EINVAL;
2511 *((unsigned int *)kp->arg) = num;
2512 return 0;
2513}
2514
2515static int param_set_portnr(const char *val, const struct kernel_param *kp)
2516{
2517 return param_set_uint_minmax(val, kp,
2518 RPC_MIN_RESVPORT,
2519 RPC_MAX_RESVPORT);
2520}
2521
2522static struct kernel_param_ops param_ops_portnr = {
2523 .set = param_set_portnr,
2524 .get = param_get_uint,
2525};
2526
2527#define param_check_portnr(name, p) \
2528 __param_check(name, p, unsigned int);
2529
2530module_param_named(min_resvport, xprt_min_resvport, portnr, 0644);
2531module_param_named(max_resvport, xprt_max_resvport, portnr, 0644);
2532
2533static int param_set_slot_table_size(const char *val,
2534 const struct kernel_param *kp)
2535{
2536 return param_set_uint_minmax(val, kp,
2537 RPC_MIN_SLOT_TABLE,
2538 RPC_MAX_SLOT_TABLE);
2539}
2540
2541static struct kernel_param_ops param_ops_slot_table_size = {
2542 .set = param_set_slot_table_size,
2543 .get = param_get_uint,
2544};
2545
2546#define param_check_slot_table_size(name, p) \
2547 __param_check(name, p, unsigned int);
2548
2549module_param_named(tcp_slot_table_entries, xprt_tcp_slot_table_entries,
2550 slot_table_size, 0644);
2551module_param_named(udp_slot_table_entries, xprt_udp_slot_table_entries,
2552 slot_table_size, 0644);
2553
2554