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-rw-r--r--net/sunrpc/svcsock.c407
1 files changed, 279 insertions, 128 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index ff1f8bf680aa..63ae94771b8e 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -36,11 +36,13 @@
36#include <net/sock.h> 36#include <net/sock.h>
37#include <net/checksum.h> 37#include <net/checksum.h>
38#include <net/ip.h> 38#include <net/ip.h>
39#include <net/ipv6.h>
39#include <net/tcp_states.h> 40#include <net/tcp_states.h>
40#include <asm/uaccess.h> 41#include <asm/uaccess.h>
41#include <asm/ioctls.h> 42#include <asm/ioctls.h>
42 43
43#include <linux/sunrpc/types.h> 44#include <linux/sunrpc/types.h>
45#include <linux/sunrpc/clnt.h>
44#include <linux/sunrpc/xdr.h> 46#include <linux/sunrpc/xdr.h>
45#include <linux/sunrpc/svcsock.h> 47#include <linux/sunrpc/svcsock.h>
46#include <linux/sunrpc/stats.h> 48#include <linux/sunrpc/stats.h>
@@ -58,10 +60,16 @@
58 * providing that certain rules are followed: 60 * providing that certain rules are followed:
59 * 61 *
60 * SK_CONN, SK_DATA, can be set or cleared at any time. 62 * SK_CONN, SK_DATA, can be set or cleared at any time.
61 * after a set, svc_sock_enqueue must be called. 63 * after a set, svc_sock_enqueue must be called.
62 * after a clear, the socket must be read/accepted 64 * after a clear, the socket must be read/accepted
63 * if this succeeds, it must be set again. 65 * if this succeeds, it must be set again.
64 * SK_CLOSE can set at any time. It is never cleared. 66 * SK_CLOSE can set at any time. It is never cleared.
67 * sk_inuse contains a bias of '1' until SK_DEAD is set.
68 * so when sk_inuse hits zero, we know the socket is dead
69 * and no-one is using it.
70 * SK_DEAD can only be set while SK_BUSY is held which ensures
71 * no other thread will be using the socket or will try to
72 * set SK_DEAD.
65 * 73 *
66 */ 74 */
67 75
@@ -69,7 +77,8 @@
69 77
70 78
71static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *, 79static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *,
72 int *errp, int pmap_reg); 80 int *errp, int flags);
81static void svc_delete_socket(struct svc_sock *svsk);
73static void svc_udp_data_ready(struct sock *, int); 82static void svc_udp_data_ready(struct sock *, int);
74static int svc_udp_recvfrom(struct svc_rqst *); 83static int svc_udp_recvfrom(struct svc_rqst *);
75static int svc_udp_sendto(struct svc_rqst *); 84static int svc_udp_sendto(struct svc_rqst *);
@@ -114,6 +123,41 @@ static inline void svc_reclassify_socket(struct socket *sock)
114} 123}
115#endif 124#endif
116 125
126static char *__svc_print_addr(struct sockaddr *addr, char *buf, size_t len)
127{
128 switch (addr->sa_family) {
129 case AF_INET:
130 snprintf(buf, len, "%u.%u.%u.%u, port=%u",
131 NIPQUAD(((struct sockaddr_in *) addr)->sin_addr),
132 htons(((struct sockaddr_in *) addr)->sin_port));
133 break;
134#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
135 case AF_INET6:
136 snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x, port=%u",
137 NIP6(((struct sockaddr_in6 *) addr)->sin6_addr),
138 htons(((struct sockaddr_in6 *) addr)->sin6_port));
139 break;
140#endif
141 default:
142 snprintf(buf, len, "unknown address type: %d", addr->sa_family);
143 break;
144 }
145 return buf;
146}
147
148/**
149 * svc_print_addr - Format rq_addr field for printing
150 * @rqstp: svc_rqst struct containing address to print
151 * @buf: target buffer for formatted address
152 * @len: length of target buffer
153 *
154 */
155char *svc_print_addr(struct svc_rqst *rqstp, char *buf, size_t len)
156{
157 return __svc_print_addr(svc_addr(rqstp), buf, len);
158}
159EXPORT_SYMBOL_GPL(svc_print_addr);
160
117/* 161/*
118 * Queue up an idle server thread. Must have pool->sp_lock held. 162 * Queue up an idle server thread. Must have pool->sp_lock held.
119 * Note: this is really a stack rather than a queue, so that we only 163 * Note: this is really a stack rather than a queue, so that we only
@@ -245,7 +289,7 @@ svc_sock_enqueue(struct svc_sock *svsk)
245 svsk->sk_sk, rqstp); 289 svsk->sk_sk, rqstp);
246 svc_thread_dequeue(pool, rqstp); 290 svc_thread_dequeue(pool, rqstp);
247 if (rqstp->rq_sock) 291 if (rqstp->rq_sock)
248 printk(KERN_ERR 292 printk(KERN_ERR
249 "svc_sock_enqueue: server %p, rq_sock=%p!\n", 293 "svc_sock_enqueue: server %p, rq_sock=%p!\n",
250 rqstp, rqstp->rq_sock); 294 rqstp, rqstp->rq_sock);
251 rqstp->rq_sock = svsk; 295 rqstp->rq_sock = svsk;
@@ -329,8 +373,9 @@ void svc_reserve(struct svc_rqst *rqstp, int space)
329static inline void 373static inline void
330svc_sock_put(struct svc_sock *svsk) 374svc_sock_put(struct svc_sock *svsk)
331{ 375{
332 if (atomic_dec_and_test(&svsk->sk_inuse) && 376 if (atomic_dec_and_test(&svsk->sk_inuse)) {
333 test_bit(SK_DEAD, &svsk->sk_flags)) { 377 BUG_ON(! test_bit(SK_DEAD, &svsk->sk_flags));
378
334 dprintk("svc: releasing dead socket\n"); 379 dprintk("svc: releasing dead socket\n");
335 if (svsk->sk_sock->file) 380 if (svsk->sk_sock->file)
336 sockfd_put(svsk->sk_sock); 381 sockfd_put(svsk->sk_sock);
@@ -402,6 +447,43 @@ svc_wake_up(struct svc_serv *serv)
402 } 447 }
403} 448}
404 449
450union svc_pktinfo_u {
451 struct in_pktinfo pkti;
452#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
453 struct in6_pktinfo pkti6;
454#endif
455};
456
457static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
458{
459 switch (rqstp->rq_sock->sk_sk->sk_family) {
460 case AF_INET: {
461 struct in_pktinfo *pki = CMSG_DATA(cmh);
462
463 cmh->cmsg_level = SOL_IP;
464 cmh->cmsg_type = IP_PKTINFO;
465 pki->ipi_ifindex = 0;
466 pki->ipi_spec_dst.s_addr = rqstp->rq_daddr.addr.s_addr;
467 cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
468 }
469 break;
470#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
471 case AF_INET6: {
472 struct in6_pktinfo *pki = CMSG_DATA(cmh);
473
474 cmh->cmsg_level = SOL_IPV6;
475 cmh->cmsg_type = IPV6_PKTINFO;
476 pki->ipi6_ifindex = 0;
477 ipv6_addr_copy(&pki->ipi6_addr,
478 &rqstp->rq_daddr.addr6);
479 cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
480 }
481 break;
482#endif
483 }
484 return;
485}
486
405/* 487/*
406 * Generic sendto routine 488 * Generic sendto routine
407 */ 489 */
@@ -411,9 +493,8 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
411 struct svc_sock *svsk = rqstp->rq_sock; 493 struct svc_sock *svsk = rqstp->rq_sock;
412 struct socket *sock = svsk->sk_sock; 494 struct socket *sock = svsk->sk_sock;
413 int slen; 495 int slen;
414 char buffer[CMSG_SPACE(sizeof(struct in_pktinfo))]; 496 char buffer[CMSG_SPACE(sizeof(union svc_pktinfo_u))];
415 struct cmsghdr *cmh = (struct cmsghdr *)buffer; 497 struct cmsghdr *cmh = (struct cmsghdr *)buffer;
416 struct in_pktinfo *pki = (struct in_pktinfo *)CMSG_DATA(cmh);
417 int len = 0; 498 int len = 0;
418 int result; 499 int result;
419 int size; 500 int size;
@@ -421,25 +502,20 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
421 size_t base = xdr->page_base; 502 size_t base = xdr->page_base;
422 unsigned int pglen = xdr->page_len; 503 unsigned int pglen = xdr->page_len;
423 unsigned int flags = MSG_MORE; 504 unsigned int flags = MSG_MORE;
505 char buf[RPC_MAX_ADDRBUFLEN];
424 506
425 slen = xdr->len; 507 slen = xdr->len;
426 508
427 if (rqstp->rq_prot == IPPROTO_UDP) { 509 if (rqstp->rq_prot == IPPROTO_UDP) {
428 /* set the source and destination */ 510 struct msghdr msg = {
429 struct msghdr msg; 511 .msg_name = &rqstp->rq_addr,
430 msg.msg_name = &rqstp->rq_addr; 512 .msg_namelen = rqstp->rq_addrlen,
431 msg.msg_namelen = sizeof(rqstp->rq_addr); 513 .msg_control = cmh,
432 msg.msg_iov = NULL; 514 .msg_controllen = sizeof(buffer),
433 msg.msg_iovlen = 0; 515 .msg_flags = MSG_MORE,
434 msg.msg_flags = MSG_MORE; 516 };
435 517
436 msg.msg_control = cmh; 518 svc_set_cmsg_data(rqstp, cmh);
437 msg.msg_controllen = sizeof(buffer);
438 cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
439 cmh->cmsg_level = SOL_IP;
440 cmh->cmsg_type = IP_PKTINFO;
441 pki->ipi_ifindex = 0;
442 pki->ipi_spec_dst.s_addr = rqstp->rq_daddr;
443 519
444 if (sock_sendmsg(sock, &msg, 0) < 0) 520 if (sock_sendmsg(sock, &msg, 0) < 0)
445 goto out; 521 goto out;
@@ -476,16 +552,16 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
476 if (xdr->tail[0].iov_len) { 552 if (xdr->tail[0].iov_len) {
477 result = kernel_sendpage(sock, rqstp->rq_respages[0], 553 result = kernel_sendpage(sock, rqstp->rq_respages[0],
478 ((unsigned long)xdr->tail[0].iov_base) 554 ((unsigned long)xdr->tail[0].iov_base)
479 & (PAGE_SIZE-1), 555 & (PAGE_SIZE-1),
480 xdr->tail[0].iov_len, 0); 556 xdr->tail[0].iov_len, 0);
481 557
482 if (result > 0) 558 if (result > 0)
483 len += result; 559 len += result;
484 } 560 }
485out: 561out:
486 dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %x)\n", 562 dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n",
487 rqstp->rq_sock, xdr->head[0].iov_base, xdr->head[0].iov_len, xdr->len, len, 563 rqstp->rq_sock, xdr->head[0].iov_base, xdr->head[0].iov_len,
488 rqstp->rq_addr.sin_addr.s_addr); 564 xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf)));
489 565
490 return len; 566 return len;
491} 567}
@@ -520,7 +596,7 @@ svc_sock_names(char *buf, struct svc_serv *serv, char *toclose)
520 596
521 if (!serv) 597 if (!serv)
522 return 0; 598 return 0;
523 spin_lock(&serv->sv_lock); 599 spin_lock_bh(&serv->sv_lock);
524 list_for_each_entry(svsk, &serv->sv_permsocks, sk_list) { 600 list_for_each_entry(svsk, &serv->sv_permsocks, sk_list) {
525 int onelen = one_sock_name(buf+len, svsk); 601 int onelen = one_sock_name(buf+len, svsk);
526 if (toclose && strcmp(toclose, buf+len) == 0) 602 if (toclose && strcmp(toclose, buf+len) == 0)
@@ -528,12 +604,12 @@ svc_sock_names(char *buf, struct svc_serv *serv, char *toclose)
528 else 604 else
529 len += onelen; 605 len += onelen;
530 } 606 }
531 spin_unlock(&serv->sv_lock); 607 spin_unlock_bh(&serv->sv_lock);
532 if (closesk) 608 if (closesk)
533 /* Should unregister with portmap, but you cannot 609 /* Should unregister with portmap, but you cannot
534 * unregister just one protocol... 610 * unregister just one protocol...
535 */ 611 */
536 svc_delete_socket(closesk); 612 svc_close_socket(closesk);
537 else if (toclose) 613 else if (toclose)
538 return -ENOENT; 614 return -ENOENT;
539 return len; 615 return len;
@@ -560,31 +636,22 @@ svc_recv_available(struct svc_sock *svsk)
560static int 636static int
561svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, int buflen) 637svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, int buflen)
562{ 638{
563 struct msghdr msg; 639 struct svc_sock *svsk = rqstp->rq_sock;
564 struct socket *sock; 640 struct msghdr msg = {
565 int len, alen; 641 .msg_flags = MSG_DONTWAIT,
566 642 };
567 rqstp->rq_addrlen = sizeof(rqstp->rq_addr); 643 int len;
568 sock = rqstp->rq_sock->sk_sock;
569
570 msg.msg_name = &rqstp->rq_addr;
571 msg.msg_namelen = sizeof(rqstp->rq_addr);
572 msg.msg_control = NULL;
573 msg.msg_controllen = 0;
574
575 msg.msg_flags = MSG_DONTWAIT;
576 644
577 len = kernel_recvmsg(sock, &msg, iov, nr, buflen, MSG_DONTWAIT); 645 len = kernel_recvmsg(svsk->sk_sock, &msg, iov, nr, buflen,
646 msg.msg_flags);
578 647
579 /* sock_recvmsg doesn't fill in the name/namelen, so we must.. 648 /* sock_recvmsg doesn't fill in the name/namelen, so we must..
580 * possibly we should cache this in the svc_sock structure
581 * at accept time. FIXME
582 */ 649 */
583 alen = sizeof(rqstp->rq_addr); 650 memcpy(&rqstp->rq_addr, &svsk->sk_remote, svsk->sk_remotelen);
584 kernel_getpeername(sock, (struct sockaddr *)&rqstp->rq_addr, &alen); 651 rqstp->rq_addrlen = svsk->sk_remotelen;
585 652
586 dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n", 653 dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n",
587 rqstp->rq_sock, iov[0].iov_base, iov[0].iov_len, len); 654 svsk, iov[0].iov_base, iov[0].iov_len, len);
588 655
589 return len; 656 return len;
590} 657}
@@ -654,6 +721,47 @@ svc_write_space(struct sock *sk)
654 } 721 }
655} 722}
656 723
724static void svc_udp_get_sender_address(struct svc_rqst *rqstp,
725 struct sk_buff *skb)
726{
727 switch (rqstp->rq_sock->sk_sk->sk_family) {
728 case AF_INET: {
729 /* this seems to come from net/ipv4/udp.c:udp_recvmsg */
730 struct sockaddr_in *sin = svc_addr_in(rqstp);
731
732 sin->sin_family = AF_INET;
733 sin->sin_port = skb->h.uh->source;
734 sin->sin_addr.s_addr = skb->nh.iph->saddr;
735 rqstp->rq_addrlen = sizeof(struct sockaddr_in);
736 /* Remember which interface received this request */
737 rqstp->rq_daddr.addr.s_addr = skb->nh.iph->daddr;
738 }
739 break;
740#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
741 case AF_INET6: {
742 /* this is derived from net/ipv6/udp.c:udpv6_recvmesg */
743 struct sockaddr_in6 *sin6 = svc_addr_in6(rqstp);
744
745 sin6->sin6_family = AF_INET6;
746 sin6->sin6_port = skb->h.uh->source;
747 sin6->sin6_flowinfo = 0;
748 sin6->sin6_scope_id = 0;
749 if (ipv6_addr_type(&sin6->sin6_addr) &
750 IPV6_ADDR_LINKLOCAL)
751 sin6->sin6_scope_id = IP6CB(skb)->iif;
752 ipv6_addr_copy(&sin6->sin6_addr,
753 &skb->nh.ipv6h->saddr);
754 rqstp->rq_addrlen = sizeof(struct sockaddr_in);
755 /* Remember which interface received this request */
756 ipv6_addr_copy(&rqstp->rq_daddr.addr6,
757 &skb->nh.ipv6h->saddr);
758 }
759 break;
760#endif
761 }
762 return;
763}
764
657/* 765/*
658 * Receive a datagram from a UDP socket. 766 * Receive a datagram from a UDP socket.
659 */ 767 */
@@ -683,6 +791,11 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
683 return svc_deferred_recv(rqstp); 791 return svc_deferred_recv(rqstp);
684 } 792 }
685 793
794 if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
795 svc_delete_socket(svsk);
796 return 0;
797 }
798
686 clear_bit(SK_DATA, &svsk->sk_flags); 799 clear_bit(SK_DATA, &svsk->sk_flags);
687 while ((skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) { 800 while ((skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) {
688 if (err == -EAGAIN) { 801 if (err == -EAGAIN) {
@@ -698,7 +811,7 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
698 tv.tv_sec = xtime.tv_sec; 811 tv.tv_sec = xtime.tv_sec;
699 tv.tv_usec = xtime.tv_nsec / NSEC_PER_USEC; 812 tv.tv_usec = xtime.tv_nsec / NSEC_PER_USEC;
700 skb_set_timestamp(skb, &tv); 813 skb_set_timestamp(skb, &tv);
701 /* Don't enable netstamp, sunrpc doesn't 814 /* Don't enable netstamp, sunrpc doesn't
702 need that much accuracy */ 815 need that much accuracy */
703 } 816 }
704 skb_get_timestamp(skb, &svsk->sk_sk->sk_stamp); 817 skb_get_timestamp(skb, &svsk->sk_sk->sk_stamp);
@@ -712,13 +825,9 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
712 len = skb->len - sizeof(struct udphdr); 825 len = skb->len - sizeof(struct udphdr);
713 rqstp->rq_arg.len = len; 826 rqstp->rq_arg.len = len;
714 827
715 rqstp->rq_prot = IPPROTO_UDP; 828 rqstp->rq_prot = IPPROTO_UDP;
716 829
717 /* Get sender address */ 830 svc_udp_get_sender_address(rqstp, skb);
718 rqstp->rq_addr.sin_family = AF_INET;
719 rqstp->rq_addr.sin_port = skb->h.uh->source;
720 rqstp->rq_addr.sin_addr.s_addr = skb->nh.iph->saddr;
721 rqstp->rq_daddr = skb->nh.iph->daddr;
722 831
723 if (skb_is_nonlinear(skb)) { 832 if (skb_is_nonlinear(skb)) {
724 /* we have to copy */ 833 /* we have to copy */
@@ -730,7 +839,7 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
730 return 0; 839 return 0;
731 } 840 }
732 local_bh_enable(); 841 local_bh_enable();
733 skb_free_datagram(svsk->sk_sk, skb); 842 skb_free_datagram(svsk->sk_sk, skb);
734 } else { 843 } else {
735 /* we can use it in-place */ 844 /* we can use it in-place */
736 rqstp->rq_arg.head[0].iov_base = skb->data + sizeof(struct udphdr); 845 rqstp->rq_arg.head[0].iov_base = skb->data + sizeof(struct udphdr);
@@ -781,7 +890,7 @@ svc_udp_init(struct svc_sock *svsk)
781 svsk->sk_sendto = svc_udp_sendto; 890 svsk->sk_sendto = svc_udp_sendto;
782 891
783 /* initialise setting must have enough space to 892 /* initialise setting must have enough space to
784 * receive and respond to one request. 893 * receive and respond to one request.
785 * svc_udp_recvfrom will re-adjust if necessary 894 * svc_udp_recvfrom will re-adjust if necessary
786 */ 895 */
787 svc_sock_setbufsize(svsk->sk_sock, 896 svc_sock_setbufsize(svsk->sk_sock,
@@ -862,18 +971,36 @@ svc_tcp_data_ready(struct sock *sk, int count)
862 wake_up_interruptible(sk->sk_sleep); 971 wake_up_interruptible(sk->sk_sleep);
863} 972}
864 973
974static inline int svc_port_is_privileged(struct sockaddr *sin)
975{
976 switch (sin->sa_family) {
977 case AF_INET:
978 return ntohs(((struct sockaddr_in *)sin)->sin_port)
979 < PROT_SOCK;
980#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
981 case AF_INET6:
982 return ntohs(((struct sockaddr_in6 *)sin)->sin6_port)
983 < PROT_SOCK;
984#endif
985 default:
986 return 0;
987 }
988}
989
865/* 990/*
866 * Accept a TCP connection 991 * Accept a TCP connection
867 */ 992 */
868static void 993static void
869svc_tcp_accept(struct svc_sock *svsk) 994svc_tcp_accept(struct svc_sock *svsk)
870{ 995{
871 struct sockaddr_in sin; 996 struct sockaddr_storage addr;
997 struct sockaddr *sin = (struct sockaddr *) &addr;
872 struct svc_serv *serv = svsk->sk_server; 998 struct svc_serv *serv = svsk->sk_server;
873 struct socket *sock = svsk->sk_sock; 999 struct socket *sock = svsk->sk_sock;
874 struct socket *newsock; 1000 struct socket *newsock;
875 struct svc_sock *newsvsk; 1001 struct svc_sock *newsvsk;
876 int err, slen; 1002 int err, slen;
1003 char buf[RPC_MAX_ADDRBUFLEN];
877 1004
878 dprintk("svc: tcp_accept %p sock %p\n", svsk, sock); 1005 dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
879 if (!sock) 1006 if (!sock)
@@ -894,8 +1021,7 @@ svc_tcp_accept(struct svc_sock *svsk)
894 set_bit(SK_CONN, &svsk->sk_flags); 1021 set_bit(SK_CONN, &svsk->sk_flags);
895 svc_sock_enqueue(svsk); 1022 svc_sock_enqueue(svsk);
896 1023
897 slen = sizeof(sin); 1024 err = kernel_getpeername(newsock, sin, &slen);
898 err = kernel_getpeername(newsock, (struct sockaddr *) &sin, &slen);
899 if (err < 0) { 1025 if (err < 0) {
900 if (net_ratelimit()) 1026 if (net_ratelimit())
901 printk(KERN_WARNING "%s: peername failed (err %d)!\n", 1027 printk(KERN_WARNING "%s: peername failed (err %d)!\n",
@@ -904,27 +1030,30 @@ svc_tcp_accept(struct svc_sock *svsk)
904 } 1030 }
905 1031
906 /* Ideally, we would want to reject connections from unauthorized 1032 /* Ideally, we would want to reject connections from unauthorized
907 * hosts here, but when we get encription, the IP of the host won't 1033 * hosts here, but when we get encryption, the IP of the host won't
908 * tell us anything. For now just warn about unpriv connections. 1034 * tell us anything. For now just warn about unpriv connections.
909 */ 1035 */
910 if (ntohs(sin.sin_port) >= 1024) { 1036 if (!svc_port_is_privileged(sin)) {
911 dprintk(KERN_WARNING 1037 dprintk(KERN_WARNING
912 "%s: connect from unprivileged port: %u.%u.%u.%u:%d\n", 1038 "%s: connect from unprivileged port: %s\n",
913 serv->sv_name, 1039 serv->sv_name,
914 NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port)); 1040 __svc_print_addr(sin, buf, sizeof(buf)));
915 } 1041 }
916 1042 dprintk("%s: connect from %s\n", serv->sv_name,
917 dprintk("%s: connect from %u.%u.%u.%u:%04x\n", serv->sv_name, 1043 __svc_print_addr(sin, buf, sizeof(buf)));
918 NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
919 1044
920 /* make sure that a write doesn't block forever when 1045 /* make sure that a write doesn't block forever when
921 * low on memory 1046 * low on memory
922 */ 1047 */
923 newsock->sk->sk_sndtimeo = HZ*30; 1048 newsock->sk->sk_sndtimeo = HZ*30;
924 1049
925 if (!(newsvsk = svc_setup_socket(serv, newsock, &err, 0))) 1050 if (!(newsvsk = svc_setup_socket(serv, newsock, &err,
1051 (SVC_SOCK_ANONYMOUS | SVC_SOCK_TEMPORARY))))
926 goto failed; 1052 goto failed;
1053 memcpy(&newsvsk->sk_remote, sin, slen);
1054 newsvsk->sk_remotelen = slen;
927 1055
1056 svc_sock_received(newsvsk);
928 1057
929 /* make sure that we don't have too many active connections. 1058 /* make sure that we don't have too many active connections.
930 * If we have, something must be dropped. 1059 * If we have, something must be dropped.
@@ -947,11 +1076,9 @@ svc_tcp_accept(struct svc_sock *svsk)
947 "sockets, consider increasing the " 1076 "sockets, consider increasing the "
948 "number of nfsd threads\n", 1077 "number of nfsd threads\n",
949 serv->sv_name); 1078 serv->sv_name);
950 printk(KERN_NOTICE "%s: last TCP connect from " 1079 printk(KERN_NOTICE
951 "%u.%u.%u.%u:%d\n", 1080 "%s: last TCP connect from %s\n",
952 serv->sv_name, 1081 serv->sv_name, buf);
953 NIPQUAD(sin.sin_addr.s_addr),
954 ntohs(sin.sin_port));
955 } 1082 }
956 /* 1083 /*
957 * Always select the oldest socket. It's not fair, 1084 * Always select the oldest socket. It's not fair,
@@ -1025,7 +1152,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
1025 * on the number of threads which will access the socket. 1152 * on the number of threads which will access the socket.
1026 * 1153 *
1027 * rcvbuf just needs to be able to hold a few requests. 1154 * rcvbuf just needs to be able to hold a few requests.
1028 * Normally they will be removed from the queue 1155 * Normally they will be removed from the queue
1029 * as soon a a complete request arrives. 1156 * as soon a a complete request arrives.
1030 */ 1157 */
1031 svc_sock_setbufsize(svsk->sk_sock, 1158 svc_sock_setbufsize(svsk->sk_sock,
@@ -1050,7 +1177,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
1050 1177
1051 if (len < want) { 1178 if (len < want) {
1052 dprintk("svc: short recvfrom while reading record length (%d of %lu)\n", 1179 dprintk("svc: short recvfrom while reading record length (%d of %lu)\n",
1053 len, want); 1180 len, want);
1054 svc_sock_received(svsk); 1181 svc_sock_received(svsk);
1055 return -EAGAIN; /* record header not complete */ 1182 return -EAGAIN; /* record header not complete */
1056 } 1183 }
@@ -1176,7 +1303,8 @@ svc_tcp_sendto(struct svc_rqst *rqstp)
1176 rqstp->rq_sock->sk_server->sv_name, 1303 rqstp->rq_sock->sk_server->sv_name,
1177 (sent<0)?"got error":"sent only", 1304 (sent<0)?"got error":"sent only",
1178 sent, xbufp->len); 1305 sent, xbufp->len);
1179 svc_delete_socket(rqstp->rq_sock); 1306 set_bit(SK_CLOSE, &rqstp->rq_sock->sk_flags);
1307 svc_sock_enqueue(rqstp->rq_sock);
1180 sent = -EAGAIN; 1308 sent = -EAGAIN;
1181 } 1309 }
1182 return sent; 1310 return sent;
@@ -1207,7 +1335,7 @@ svc_tcp_init(struct svc_sock *svsk)
1207 tp->nonagle = 1; /* disable Nagle's algorithm */ 1335 tp->nonagle = 1; /* disable Nagle's algorithm */
1208 1336
1209 /* initialise setting must have enough space to 1337 /* initialise setting must have enough space to
1210 * receive and respond to one request. 1338 * receive and respond to one request.
1211 * svc_tcp_recvfrom will re-adjust if necessary 1339 * svc_tcp_recvfrom will re-adjust if necessary
1212 */ 1340 */
1213 svc_sock_setbufsize(svsk->sk_sock, 1341 svc_sock_setbufsize(svsk->sk_sock,
@@ -1216,7 +1344,7 @@ svc_tcp_init(struct svc_sock *svsk)
1216 1344
1217 set_bit(SK_CHNGBUF, &svsk->sk_flags); 1345 set_bit(SK_CHNGBUF, &svsk->sk_flags);
1218 set_bit(SK_DATA, &svsk->sk_flags); 1346 set_bit(SK_DATA, &svsk->sk_flags);
1219 if (sk->sk_state != TCP_ESTABLISHED) 1347 if (sk->sk_state != TCP_ESTABLISHED)
1220 set_bit(SK_CLOSE, &svsk->sk_flags); 1348 set_bit(SK_CLOSE, &svsk->sk_flags);
1221 } 1349 }
1222} 1350}
@@ -1232,7 +1360,7 @@ svc_sock_update_bufs(struct svc_serv *serv)
1232 1360
1233 spin_lock_bh(&serv->sv_lock); 1361 spin_lock_bh(&serv->sv_lock);
1234 list_for_each(le, &serv->sv_permsocks) { 1362 list_for_each(le, &serv->sv_permsocks) {
1235 struct svc_sock *svsk = 1363 struct svc_sock *svsk =
1236 list_entry(le, struct svc_sock, sk_list); 1364 list_entry(le, struct svc_sock, sk_list);
1237 set_bit(SK_CHNGBUF, &svsk->sk_flags); 1365 set_bit(SK_CHNGBUF, &svsk->sk_flags);
1238 } 1366 }
@@ -1252,7 +1380,7 @@ svc_sock_update_bufs(struct svc_serv *serv)
1252int 1380int
1253svc_recv(struct svc_rqst *rqstp, long timeout) 1381svc_recv(struct svc_rqst *rqstp, long timeout)
1254{ 1382{
1255 struct svc_sock *svsk =NULL; 1383 struct svc_sock *svsk = NULL;
1256 struct svc_serv *serv = rqstp->rq_server; 1384 struct svc_serv *serv = rqstp->rq_server;
1257 struct svc_pool *pool = rqstp->rq_pool; 1385 struct svc_pool *pool = rqstp->rq_pool;
1258 int len, i; 1386 int len, i;
@@ -1264,11 +1392,11 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
1264 rqstp, timeout); 1392 rqstp, timeout);
1265 1393
1266 if (rqstp->rq_sock) 1394 if (rqstp->rq_sock)
1267 printk(KERN_ERR 1395 printk(KERN_ERR
1268 "svc_recv: service %p, socket not NULL!\n", 1396 "svc_recv: service %p, socket not NULL!\n",
1269 rqstp); 1397 rqstp);
1270 if (waitqueue_active(&rqstp->rq_wait)) 1398 if (waitqueue_active(&rqstp->rq_wait))
1271 printk(KERN_ERR 1399 printk(KERN_ERR
1272 "svc_recv: service %p, wait queue active!\n", 1400 "svc_recv: service %p, wait queue active!\n",
1273 rqstp); 1401 rqstp);
1274 1402
@@ -1349,7 +1477,7 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
1349 svsk->sk_lastrecv = get_seconds(); 1477 svsk->sk_lastrecv = get_seconds();
1350 clear_bit(SK_OLD, &svsk->sk_flags); 1478 clear_bit(SK_OLD, &svsk->sk_flags);
1351 1479
1352 rqstp->rq_secure = ntohs(rqstp->rq_addr.sin_port) < 1024; 1480 rqstp->rq_secure = svc_port_is_privileged(svc_addr(rqstp));
1353 rqstp->rq_chandle.defer = svc_defer; 1481 rqstp->rq_chandle.defer = svc_defer;
1354 1482
1355 if (serv->sv_stats) 1483 if (serv->sv_stats)
@@ -1357,7 +1485,7 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
1357 return len; 1485 return len;
1358} 1486}
1359 1487
1360/* 1488/*
1361 * Drop request 1489 * Drop request
1362 */ 1490 */
1363void 1491void
@@ -1462,12 +1590,14 @@ svc_age_temp_sockets(unsigned long closure)
1462 * Initialize socket for RPC use and create svc_sock struct 1590 * Initialize socket for RPC use and create svc_sock struct
1463 * XXX: May want to setsockopt SO_SNDBUF and SO_RCVBUF. 1591 * XXX: May want to setsockopt SO_SNDBUF and SO_RCVBUF.
1464 */ 1592 */
1465static struct svc_sock * 1593static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
1466svc_setup_socket(struct svc_serv *serv, struct socket *sock, 1594 struct socket *sock,
1467 int *errp, int pmap_register) 1595 int *errp, int flags)
1468{ 1596{
1469 struct svc_sock *svsk; 1597 struct svc_sock *svsk;
1470 struct sock *inet; 1598 struct sock *inet;
1599 int pmap_register = !(flags & SVC_SOCK_ANONYMOUS);
1600 int is_temporary = flags & SVC_SOCK_TEMPORARY;
1471 1601
1472 dprintk("svc: svc_setup_socket %p\n", sock); 1602 dprintk("svc: svc_setup_socket %p\n", sock);
1473 if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) { 1603 if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) {
@@ -1495,7 +1625,7 @@ svc_setup_socket(struct svc_serv *serv, struct socket *sock,
1495 svsk->sk_odata = inet->sk_data_ready; 1625 svsk->sk_odata = inet->sk_data_ready;
1496 svsk->sk_owspace = inet->sk_write_space; 1626 svsk->sk_owspace = inet->sk_write_space;
1497 svsk->sk_server = serv; 1627 svsk->sk_server = serv;
1498 atomic_set(&svsk->sk_inuse, 0); 1628 atomic_set(&svsk->sk_inuse, 1);
1499 svsk->sk_lastrecv = get_seconds(); 1629 svsk->sk_lastrecv = get_seconds();
1500 spin_lock_init(&svsk->sk_defer_lock); 1630 spin_lock_init(&svsk->sk_defer_lock);
1501 INIT_LIST_HEAD(&svsk->sk_deferred); 1631 INIT_LIST_HEAD(&svsk->sk_deferred);
@@ -1509,7 +1639,7 @@ svc_setup_socket(struct svc_serv *serv, struct socket *sock,
1509 svc_tcp_init(svsk); 1639 svc_tcp_init(svsk);
1510 1640
1511 spin_lock_bh(&serv->sv_lock); 1641 spin_lock_bh(&serv->sv_lock);
1512 if (!pmap_register) { 1642 if (is_temporary) {
1513 set_bit(SK_TEMP, &svsk->sk_flags); 1643 set_bit(SK_TEMP, &svsk->sk_flags);
1514 list_add(&svsk->sk_list, &serv->sv_tempsocks); 1644 list_add(&svsk->sk_list, &serv->sv_tempsocks);
1515 serv->sv_tmpcnt++; 1645 serv->sv_tmpcnt++;
@@ -1529,8 +1659,6 @@ svc_setup_socket(struct svc_serv *serv, struct socket *sock,
1529 dprintk("svc: svc_setup_socket created %p (inet %p)\n", 1659 dprintk("svc: svc_setup_socket created %p (inet %p)\n",
1530 svsk, svsk->sk_sk); 1660 svsk, svsk->sk_sk);
1531 1661
1532 clear_bit(SK_BUSY, &svsk->sk_flags);
1533 svc_sock_enqueue(svsk);
1534 return svsk; 1662 return svsk;
1535} 1663}
1536 1664
@@ -1553,9 +1681,11 @@ int svc_addsock(struct svc_serv *serv,
1553 else if (so->state > SS_UNCONNECTED) 1681 else if (so->state > SS_UNCONNECTED)
1554 err = -EISCONN; 1682 err = -EISCONN;
1555 else { 1683 else {
1556 svsk = svc_setup_socket(serv, so, &err, 1); 1684 svsk = svc_setup_socket(serv, so, &err, SVC_SOCK_DEFAULTS);
1557 if (svsk) 1685 if (svsk) {
1686 svc_sock_received(svsk);
1558 err = 0; 1687 err = 0;
1688 }
1559 } 1689 }
1560 if (err) { 1690 if (err) {
1561 sockfd_put(so); 1691 sockfd_put(so);
@@ -1569,18 +1699,18 @@ EXPORT_SYMBOL_GPL(svc_addsock);
1569/* 1699/*
1570 * Create socket for RPC service. 1700 * Create socket for RPC service.
1571 */ 1701 */
1572static int 1702static int svc_create_socket(struct svc_serv *serv, int protocol,
1573svc_create_socket(struct svc_serv *serv, int protocol, struct sockaddr_in *sin) 1703 struct sockaddr *sin, int len, int flags)
1574{ 1704{
1575 struct svc_sock *svsk; 1705 struct svc_sock *svsk;
1576 struct socket *sock; 1706 struct socket *sock;
1577 int error; 1707 int error;
1578 int type; 1708 int type;
1709 char buf[RPC_MAX_ADDRBUFLEN];
1579 1710
1580 dprintk("svc: svc_create_socket(%s, %d, %u.%u.%u.%u:%d)\n", 1711 dprintk("svc: svc_create_socket(%s, %d, %s)\n",
1581 serv->sv_program->pg_name, protocol, 1712 serv->sv_program->pg_name, protocol,
1582 NIPQUAD(sin->sin_addr.s_addr), 1713 __svc_print_addr(sin, buf, sizeof(buf)));
1583 ntohs(sin->sin_port));
1584 1714
1585 if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) { 1715 if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) {
1586 printk(KERN_WARNING "svc: only UDP and TCP " 1716 printk(KERN_WARNING "svc: only UDP and TCP "
@@ -1589,15 +1719,15 @@ svc_create_socket(struct svc_serv *serv, int protocol, struct sockaddr_in *sin)
1589 } 1719 }
1590 type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM; 1720 type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
1591 1721
1592 if ((error = sock_create_kern(PF_INET, type, protocol, &sock)) < 0) 1722 error = sock_create_kern(sin->sa_family, type, protocol, &sock);
1723 if (error < 0)
1593 return error; 1724 return error;
1594 1725
1595 svc_reclassify_socket(sock); 1726 svc_reclassify_socket(sock);
1596 1727
1597 if (type == SOCK_STREAM) 1728 if (type == SOCK_STREAM)
1598 sock->sk->sk_reuse = 1; /* allow address reuse */ 1729 sock->sk->sk_reuse = 1; /* allow address reuse */
1599 error = kernel_bind(sock, (struct sockaddr *) sin, 1730 error = kernel_bind(sock, sin, len);
1600 sizeof(*sin));
1601 if (error < 0) 1731 if (error < 0)
1602 goto bummer; 1732 goto bummer;
1603 1733
@@ -1606,8 +1736,10 @@ svc_create_socket(struct svc_serv *serv, int protocol, struct sockaddr_in *sin)
1606 goto bummer; 1736 goto bummer;
1607 } 1737 }
1608 1738
1609 if ((svsk = svc_setup_socket(serv, sock, &error, 1)) != NULL) 1739 if ((svsk = svc_setup_socket(serv, sock, &error, flags)) != NULL) {
1610 return 0; 1740 svc_sock_received(svsk);
1741 return ntohs(inet_sk(svsk->sk_sk)->sport);
1742 }
1611 1743
1612bummer: 1744bummer:
1613 dprintk("svc: svc_create_socket error = %d\n", -error); 1745 dprintk("svc: svc_create_socket error = %d\n", -error);
@@ -1618,7 +1750,7 @@ bummer:
1618/* 1750/*
1619 * Remove a dead socket 1751 * Remove a dead socket
1620 */ 1752 */
1621void 1753static void
1622svc_delete_socket(struct svc_sock *svsk) 1754svc_delete_socket(struct svc_sock *svsk)
1623{ 1755{
1624 struct svc_serv *serv; 1756 struct svc_serv *serv;
@@ -1637,43 +1769,60 @@ svc_delete_socket(struct svc_sock *svsk)
1637 1769
1638 if (!test_and_set_bit(SK_DETACHED, &svsk->sk_flags)) 1770 if (!test_and_set_bit(SK_DETACHED, &svsk->sk_flags))
1639 list_del_init(&svsk->sk_list); 1771 list_del_init(&svsk->sk_list);
1640 /* 1772 /*
1641 * We used to delete the svc_sock from whichever list 1773 * We used to delete the svc_sock from whichever list
1642 * it's sk_ready node was on, but we don't actually 1774 * it's sk_ready node was on, but we don't actually
1643 * need to. This is because the only time we're called 1775 * need to. This is because the only time we're called
1644 * while still attached to a queue, the queue itself 1776 * while still attached to a queue, the queue itself
1645 * is about to be destroyed (in svc_destroy). 1777 * is about to be destroyed (in svc_destroy).
1646 */ 1778 */
1647 if (!test_and_set_bit(SK_DEAD, &svsk->sk_flags)) 1779 if (!test_and_set_bit(SK_DEAD, &svsk->sk_flags)) {
1780 BUG_ON(atomic_read(&svsk->sk_inuse)<2);
1781 atomic_dec(&svsk->sk_inuse);
1648 if (test_bit(SK_TEMP, &svsk->sk_flags)) 1782 if (test_bit(SK_TEMP, &svsk->sk_flags))
1649 serv->sv_tmpcnt--; 1783 serv->sv_tmpcnt--;
1784 }
1650 1785
1651 /* This atomic_inc should be needed - svc_delete_socket
1652 * should have the semantic of dropping a reference.
1653 * But it doesn't yet....
1654 */
1655 atomic_inc(&svsk->sk_inuse);
1656 spin_unlock_bh(&serv->sv_lock); 1786 spin_unlock_bh(&serv->sv_lock);
1787}
1788
1789void svc_close_socket(struct svc_sock *svsk)
1790{
1791 set_bit(SK_CLOSE, &svsk->sk_flags);
1792 if (test_and_set_bit(SK_BUSY, &svsk->sk_flags))
1793 /* someone else will have to effect the close */
1794 return;
1795
1796 atomic_inc(&svsk->sk_inuse);
1797 svc_delete_socket(svsk);
1798 clear_bit(SK_BUSY, &svsk->sk_flags);
1657 svc_sock_put(svsk); 1799 svc_sock_put(svsk);
1658} 1800}
1659 1801
1660/* 1802/**
1661 * Make a socket for nfsd and lockd 1803 * svc_makesock - Make a socket for nfsd and lockd
1804 * @serv: RPC server structure
1805 * @protocol: transport protocol to use
1806 * @port: port to use
1807 * @flags: requested socket characteristics
1808 *
1662 */ 1809 */
1663int 1810int svc_makesock(struct svc_serv *serv, int protocol, unsigned short port,
1664svc_makesock(struct svc_serv *serv, int protocol, unsigned short port) 1811 int flags)
1665{ 1812{
1666 struct sockaddr_in sin; 1813 struct sockaddr_in sin = {
1814 .sin_family = AF_INET,
1815 .sin_addr.s_addr = INADDR_ANY,
1816 .sin_port = htons(port),
1817 };
1667 1818
1668 dprintk("svc: creating socket proto = %d\n", protocol); 1819 dprintk("svc: creating socket proto = %d\n", protocol);
1669 sin.sin_family = AF_INET; 1820 return svc_create_socket(serv, protocol, (struct sockaddr *) &sin,
1670 sin.sin_addr.s_addr = INADDR_ANY; 1821 sizeof(sin), flags);
1671 sin.sin_port = htons(port);
1672 return svc_create_socket(serv, protocol, &sin);
1673} 1822}
1674 1823
1675/* 1824/*
1676 * Handle defer and revisit of requests 1825 * Handle defer and revisit of requests
1677 */ 1826 */
1678 1827
1679static void svc_revisit(struct cache_deferred_req *dreq, int too_many) 1828static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
@@ -1718,7 +1867,8 @@ svc_defer(struct cache_req *req)
1718 1867
1719 dr->handle.owner = rqstp->rq_server; 1868 dr->handle.owner = rqstp->rq_server;
1720 dr->prot = rqstp->rq_prot; 1869 dr->prot = rqstp->rq_prot;
1721 dr->addr = rqstp->rq_addr; 1870 memcpy(&dr->addr, &rqstp->rq_addr, rqstp->rq_addrlen);
1871 dr->addrlen = rqstp->rq_addrlen;
1722 dr->daddr = rqstp->rq_daddr; 1872 dr->daddr = rqstp->rq_daddr;
1723 dr->argslen = rqstp->rq_arg.len >> 2; 1873 dr->argslen = rqstp->rq_arg.len >> 2;
1724 memcpy(dr->args, rqstp->rq_arg.head[0].iov_base-skip, dr->argslen<<2); 1874 memcpy(dr->args, rqstp->rq_arg.head[0].iov_base-skip, dr->argslen<<2);
@@ -1742,7 +1892,8 @@ static int svc_deferred_recv(struct svc_rqst *rqstp)
1742 rqstp->rq_arg.page_len = 0; 1892 rqstp->rq_arg.page_len = 0;
1743 rqstp->rq_arg.len = dr->argslen<<2; 1893 rqstp->rq_arg.len = dr->argslen<<2;
1744 rqstp->rq_prot = dr->prot; 1894 rqstp->rq_prot = dr->prot;
1745 rqstp->rq_addr = dr->addr; 1895 memcpy(&rqstp->rq_addr, &dr->addr, dr->addrlen);
1896 rqstp->rq_addrlen = dr->addrlen;
1746 rqstp->rq_daddr = dr->daddr; 1897 rqstp->rq_daddr = dr->daddr;
1747 rqstp->rq_respages = rqstp->rq_pages; 1898 rqstp->rq_respages = rqstp->rq_pages;
1748 return dr->argslen<<2; 1899 return dr->argslen<<2;
@@ -1752,7 +1903,7 @@ static int svc_deferred_recv(struct svc_rqst *rqstp)
1752static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk) 1903static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk)
1753{ 1904{
1754 struct svc_deferred_req *dr = NULL; 1905 struct svc_deferred_req *dr = NULL;
1755 1906
1756 if (!test_bit(SK_DEFERRED, &svsk->sk_flags)) 1907 if (!test_bit(SK_DEFERRED, &svsk->sk_flags))
1757 return NULL; 1908 return NULL;
1758 spin_lock_bh(&svsk->sk_defer_lock); 1909 spin_lock_bh(&svsk->sk_defer_lock);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-09 04:21:42 -0500