1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
39 # if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
41 #ifndef HAVE_SYSCTL_UNNUMBERED
49 SOCKLND_RECONNECTS_MIN,
50 SOCKLND_RECONNECTS_MAX,
55 SOCKLND_RX_BUFFER_SIZE,
56 SOCKLND_TX_BUFFER_SIZE,
61 SOCKLND_KEEPALIVE_IDLE,
62 SOCKLND_KEEPALIVE_COUNT,
63 SOCKLND_KEEPALIVE_INTVL,
67 SOCKLND_ZERO_COPY_RECV,
68 SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS
72 #define SOCKLND_TIMEOUT CTL_UNNUMBERED
73 #define SOCKLND_CREDITS CTL_UNNUMBERED
74 #define SOCKLND_PEER_CREDITS CTL_UNNUMBERED
75 #define SOCKLND_PEER_TIMEOUT CTL_UNNUMBERED
76 #define SOCKLND_NCONNDS CTL_UNNUMBERED
77 #define SOCKLND_RECONNECTS_MIN CTL_UNNUMBERED
78 #define SOCKLND_RECONNECTS_MAX CTL_UNNUMBERED
79 #define SOCKLND_EAGER_ACK CTL_UNNUMBERED
80 #define SOCKLND_ZERO_COPY CTL_UNNUMBERED
81 #define SOCKLND_TYPED CTL_UNNUMBERED
82 #define SOCKLND_BULK_MIN CTL_UNNUMBERED
83 #define SOCKLND_RX_BUFFER_SIZE CTL_UNNUMBERED
84 #define SOCKLND_TX_BUFFER_SIZE CTL_UNNUMBERED
85 #define SOCKLND_NAGLE CTL_UNNUMBERED
86 #define SOCKLND_IRQ_AFFINITY CTL_UNNUMBERED
87 #define SOCKLND_ROUND_ROBIN CTL_UNNUMBERED
88 #define SOCKLND_KEEPALIVE CTL_UNNUMBERED
89 #define SOCKLND_KEEPALIVE_IDLE CTL_UNNUMBERED
90 #define SOCKLND_KEEPALIVE_COUNT CTL_UNNUMBERED
91 #define SOCKLND_KEEPALIVE_INTVL CTL_UNNUMBERED
92 #define SOCKLND_BACKOFF_INIT CTL_UNNUMBERED
93 #define SOCKLND_BACKOFF_MAX CTL_UNNUMBERED
94 #define SOCKLND_PROTOCOL CTL_UNNUMBERED
95 #define SOCKLND_ZERO_COPY_RECV CTL_UNNUMBERED
96 #define SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS CTL_UNNUMBERED
99 static cfs_sysctl_table_t ksocknal_ctl_table[] = {
101 .ctl_name = SOCKLND_TIMEOUT,
102 .procname = "timeout",
103 .data = &ksocknal_tunables.ksnd_timeout,
104 .maxlen = sizeof (int),
106 .proc_handler = &proc_dointvec,
107 .strategy = &sysctl_intvec,
110 .ctl_name = SOCKLND_CREDITS,
111 .procname = "credits",
112 .data = &ksocknal_tunables.ksnd_credits,
113 .maxlen = sizeof (int),
115 .proc_handler = &proc_dointvec,
116 .strategy = &sysctl_intvec,
119 .ctl_name = SOCKLND_PEER_CREDITS,
120 .procname = "peer_credits",
121 .data = &ksocknal_tunables.ksnd_peercredits,
122 .maxlen = sizeof (int),
124 .proc_handler = &proc_dointvec,
125 .strategy = &sysctl_intvec,
128 .ctl_name = SOCKLND_PEER_TIMEOUT,
129 .procname = "peer_timeout",
130 .data = &ksocknal_tunables.ksnd_peertimeout,
131 .maxlen = sizeof (int),
133 .proc_handler = &proc_dointvec
134 .strategy = &sysctl_intvec,
137 .ctl_name = SOCKLND_NCONNDS,
138 .procname = "nconnds",
139 .data = &ksocknal_tunables.ksnd_nconnds,
140 .maxlen = sizeof (int),
142 .proc_handler = &proc_dointvec,
143 .strategy = &sysctl_intvec,
146 .ctl_name = SOCKLND_RECONNECTS_MIN,
147 .procname = "min_reconnectms",
148 .data = &ksocknal_tunables.ksnd_min_reconnectms,
149 .maxlen = sizeof (int),
151 .proc_handler = &proc_dointvec,
152 .strategy = &sysctl_intvec,
155 .ctl_name = SOCKLND_RECONNECTS_MAX,
156 .procname = "max_reconnectms",
157 .data = &ksocknal_tunables.ksnd_max_reconnectms,
158 .maxlen = sizeof (int),
160 .proc_handler = &proc_dointvec,
161 .strategy = &sysctl_intvec,
164 .ctl_name = SOCKLND_EAGER_ACK,
165 .procname = "eager_ack",
166 .data = &ksocknal_tunables.ksnd_eager_ack,
167 .maxlen = sizeof (int),
169 .proc_handler = &proc_dointvec,
170 .strategy = &sysctl_intvec,
173 .ctl_name = SOCKLND_ZERO_COPY,
174 .procname = "zero_copy",
175 .data = &ksocknal_tunables.ksnd_zc_min_payload,
176 .maxlen = sizeof (int),
178 .proc_handler = &proc_dointvec,
179 .strategy = &sysctl_intvec,
182 .ctl_name = SOCKLND_ZERO_COPY_RECV,
183 .procname = "zero_copy_recv",
184 .data = &ksocknal_tunables.ksnd_zc_recv,
185 .maxlen = sizeof (int),
187 .proc_handler = &proc_dointvec,
188 .strategy = &sysctl_intvec,
192 .ctl_name = SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS,
193 .procname = "zero_copy_recv",
194 .data = &ksocknal_tunables.ksnd_zc_recv_min_nfrags,
195 .maxlen = sizeof (int),
197 .proc_handler = &proc_dointvec,
198 .strategy = &sysctl_intvec,
201 .ctl_name = SOCKLND_TYPED,
203 .data = &ksocknal_tunables.ksnd_typed_conns,
204 .maxlen = sizeof (int),
206 .proc_handler = &proc_dointvec,
207 .strategy = &sysctl_intvec,
210 .ctl_name = SOCKLND_BULK_MIN,
211 .procname = "min_bulk",
212 .data = &ksocknal_tunables.ksnd_min_bulk,
213 .maxlen = sizeof (int),
215 .proc_handler = &proc_dointvec,
216 .strategy = &sysctl_intvec,
219 .ctl_name = SOCKLND_RX_BUFFER_SIZE,
220 .procname = "rx_buffer_size",
221 .data = &ksocknal_tunables.ksnd_rx_buffer_size,
222 .maxlen = sizeof(int),
224 .proc_handler = &proc_dointvec,
225 .strategy = &sysctl_intvec,
228 .ctl_name = SOCKLND_TX_BUFFER_SIZE,
229 .procname = "tx_buffer_size",
230 .data = &ksocknal_tunables.ksnd_tx_buffer_size,
231 .maxlen = sizeof(int),
233 .proc_handler = &proc_dointvec,
234 .strategy = &sysctl_intvec,
237 .ctl_name = SOCKLND_NAGLE,
239 .data = &ksocknal_tunables.ksnd_nagle,
240 .maxlen = sizeof(int),
242 .proc_handler = &proc_dointvec,
243 .strategy = &sysctl_intvec,
247 .ctl_name = SOCKLND_IRQ_AFFINITY,
248 .procname = "irq_affinity",
249 .data = &ksocknal_tunables.ksnd_irq_affinity,
250 .maxlen = sizeof(int),
252 .proc_handler = &proc_dointvec,
253 .strategy = &sysctl_intvec,
257 .ctl_name = SOCKLND_ROUND_ROBIN,
258 .procname = "round_robin",
259 .data = &ksocknal_tunables.ksnd_round_robin,
260 .maxlen = sizeof(int),
262 .proc_handler = &proc_dointvec,
263 .strategy = &sysctl_intvec,
266 .ctl_name = SOCKLND_KEEPALIVE,
267 .procname = "keepalive",
268 .data = &ksocknal_tunables.ksnd_keepalive,
269 .maxlen = sizeof(int),
271 .proc_handler = &proc_dointvec,
272 .strategy = &sysctl_intvec,
275 .ctl_name = SOCKLND_KEEPALIVE_IDLE,
276 .procname = "keepalive_idle",
277 .data = &ksocknal_tunables.ksnd_keepalive_idle,
278 .maxlen = sizeof(int),
280 .proc_handler = &proc_dointvec,
281 .strategy = &sysctl_intvec,
284 .ctl_name = SOCKLND_KEEPALIVE_COUNT,
285 .procname = "keepalive_count",
286 .data = &ksocknal_tunables.ksnd_keepalive_count,
287 .maxlen = sizeof(int),
289 .proc_handler = &proc_dointvec,
290 .strategy = &sysctl_intvec,
293 .ctl_name = SOCKLND_KEEPALIVE_INTVL,
294 .procname = "keepalive_intvl",
295 .data = &ksocknal_tunables.ksnd_keepalive_intvl,
296 .maxlen = sizeof(int),
298 .proc_handler = &proc_dointvec,
299 .strategy = &sysctl_intvec,
301 #ifdef SOCKNAL_BACKOFF
303 .ctl_name = SOCKLND_BACKOFF_INIT,
304 .procname = "backoff_init",
305 .data = &ksocknal_tunables.ksnd_backoff_init,
306 .maxlen = sizeof(int),
308 .proc_handler = &proc_dointvec,
309 .strategy = &sysctl_intvec,
312 .ctl_name = SOCKLND_BACKOFF_MAX,
313 .procname = "backoff_max",
314 .data = &ksocknal_tunables.ksnd_backoff_max,
315 .maxlen = sizeof(int),
317 .proc_handler = &proc_dointvec,
318 .strategy = &sysctl_intvec,
321 #if SOCKNAL_VERSION_DEBUG
323 .ctl_name = SOCKLND_PROTOCOL,
324 .procname = "protocol",
325 .data = &ksocknal_tunables.ksnd_protocol,
326 .maxlen = sizeof(int),
328 .proc_handler = &proc_dointvec,
329 .strategy = &sysctl_intvec,
336 cfs_sysctl_table_t ksocknal_top_ctl_table[] = {
338 .ctl_name = CTL_SOCKLND,
339 .procname = "socknal",
343 .child = ksocknal_ctl_table
349 ksocknal_lib_tunables_init ()
351 if (!*ksocknal_tunables.ksnd_typed_conns) {
353 #if SOCKNAL_VERSION_DEBUG
354 if (*ksocknal_tunables.ksnd_protocol < 3)
358 CERROR("Protocol V3.x MUST have typed connections\n");
363 if (*ksocknal_tunables.ksnd_zc_recv_min_nfrags < 2)
364 *ksocknal_tunables.ksnd_zc_recv_min_nfrags = 2;
365 if (*ksocknal_tunables.ksnd_zc_recv_min_nfrags > LNET_MAX_IOV)
366 *ksocknal_tunables.ksnd_zc_recv_min_nfrags = LNET_MAX_IOV;
368 ksocknal_tunables.ksnd_sysctl =
369 cfs_register_sysctl_table(ksocknal_top_ctl_table, 0);
371 if (ksocknal_tunables.ksnd_sysctl == NULL)
372 CWARN("Can't setup /proc tunables\n");
378 ksocknal_lib_tunables_fini ()
380 if (ksocknal_tunables.ksnd_sysctl != NULL)
381 cfs_unregister_sysctl_table(ksocknal_tunables.ksnd_sysctl);
385 ksocknal_lib_tunables_init ()
391 ksocknal_lib_tunables_fini ()
394 #endif /* # if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM */
397 ksocknal_lib_bind_irq (unsigned int irq)
399 #if (defined(CONFIG_SMP) && defined(CPU_AFFINITY))
403 ksock_irqinfo_t *info;
404 char *argv[] = {"/bin/sh",
408 char *envp[] = {"HOME=/",
409 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
412 LASSERT (irq < NR_IRQS);
413 if (irq == 0) /* software NIC or affinity disabled */
416 info = &ksocknal_data.ksnd_irqinfo[irq];
418 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
420 LASSERT (info->ksni_valid);
421 bind = !info->ksni_bound;
422 info->ksni_bound = 1;
424 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
426 if (!bind) /* bound already */
429 cpu = ksocknal_irqsched2cpu(info->ksni_sched);
430 snprintf (cmdline, sizeof (cmdline),
431 "echo %d > /proc/irq/%u/smp_affinity", 1 << cpu, irq);
433 LCONSOLE_INFO("Binding irq %u to CPU %d with cmd: %s\n",
436 /* FIXME: Find a better method of setting IRQ affinity...
439 USERMODEHELPER(argv[0], argv, envp);
444 ksocknal_lib_get_conn_addrs (ksock_conn_t *conn)
446 int rc = libcfs_sock_getaddr(conn->ksnc_sock, 1,
450 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
451 LASSERT (!conn->ksnc_closing);
454 CERROR ("Error %d getting sock peer IP\n", rc);
458 rc = libcfs_sock_getaddr(conn->ksnc_sock, 0,
459 &conn->ksnc_myipaddr, NULL);
461 CERROR ("Error %d getting sock local IP\n", rc);
469 ksocknal_lib_sock_irq (struct socket *sock)
473 struct dst_entry *dst;
475 if (!*ksocknal_tunables.ksnd_irq_affinity)
478 dst = sk_dst_get (sock->sk);
480 if (dst->dev != NULL) {
482 if (irq >= NR_IRQS) {
483 CERROR ("Unexpected IRQ %x\n", irq);
495 ksocknal_lib_zc_capable(ksock_conn_t *conn)
497 int caps = conn->ksnc_sock->sk->sk_route_caps;
499 if (conn->ksnc_proto == &ksocknal_protocol_v1x)
502 /* ZC if the socket supports scatter/gather and doesn't need software
504 return ((caps & NETIF_F_SG) != 0 &&
505 (caps & (NETIF_F_IP_CSUM | NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)) != 0);
509 ksocknal_lib_send_iov (ksock_conn_t *conn, ksock_tx_t *tx)
511 struct socket *sock = conn->ksnc_sock;
515 if (*ksocknal_tunables.ksnd_enable_csum && /* checksum enabled */
516 conn->ksnc_proto == &ksocknal_protocol_v2x && /* V2.x connection */
517 tx->tx_nob == tx->tx_resid && /* frist sending */
518 tx->tx_msg.ksm_csum == 0) /* not checksummed */
519 ksocknal_lib_csum_tx(tx);
521 /* NB we can't trust socket ops to either consume our iovs
522 * or leave them alone. */
525 #if SOCKNAL_SINGLE_FRAG_TX
526 struct iovec scratch;
527 struct iovec *scratchiov = &scratch;
528 unsigned int niov = 1;
530 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
531 unsigned int niov = tx->tx_niov;
533 struct msghdr msg = {
536 .msg_iov = scratchiov,
540 .msg_flags = MSG_DONTWAIT
542 mm_segment_t oldmm = get_fs();
545 for (nob = i = 0; i < niov; i++) {
546 scratchiov[i] = tx->tx_iov[i];
547 nob += scratchiov[i].iov_len;
550 if (!list_empty(&conn->ksnc_tx_queue) ||
552 msg.msg_flags |= MSG_MORE;
555 rc = sock_sendmsg(sock, &msg, nob);
562 ksocknal_lib_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx)
564 struct socket *sock = conn->ksnc_sock;
565 lnet_kiov_t *kiov = tx->tx_kiov;
569 /* Not NOOP message */
570 LASSERT (tx->tx_lnetmsg != NULL);
572 /* NB we can't trust socket ops to either consume our iovs
573 * or leave them alone. */
574 if (tx->tx_msg.ksm_zc_cookies[0] != 0) {
575 /* Zero copy is enabled */
576 struct sock *sk = sock->sk;
577 struct page *page = kiov->kiov_page;
578 int offset = kiov->kiov_offset;
579 int fragsize = kiov->kiov_len;
580 int msgflg = MSG_DONTWAIT;
582 CDEBUG(D_NET, "page %p + offset %x for %d\n",
583 page, offset, kiov->kiov_len);
585 if (!list_empty(&conn->ksnc_tx_queue) ||
586 fragsize < tx->tx_resid)
589 if (sk->sk_prot->sendpage != NULL) {
590 rc = sk->sk_prot->sendpage(sk, page,
591 offset, fragsize, msgflg);
593 rc = tcp_sendpage(sock, page, offset, fragsize, msgflg);
596 #if SOCKNAL_SINGLE_FRAG_TX || !SOCKNAL_RISK_KMAP_DEADLOCK
597 struct iovec scratch;
598 struct iovec *scratchiov = &scratch;
599 unsigned int niov = 1;
601 #ifdef CONFIG_HIGHMEM
602 #warning "XXX risk of kmap deadlock on multiple frags..."
604 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
605 unsigned int niov = tx->tx_nkiov;
607 struct msghdr msg = {
610 .msg_iov = scratchiov,
614 .msg_flags = MSG_DONTWAIT
616 mm_segment_t oldmm = get_fs();
619 for (nob = i = 0; i < niov; i++) {
620 scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
622 nob += scratchiov[i].iov_len = kiov[i].kiov_len;
625 if (!list_empty(&conn->ksnc_tx_queue) ||
627 msg.msg_flags |= MSG_MORE;
630 rc = sock_sendmsg(sock, &msg, nob);
633 for (i = 0; i < niov; i++)
634 kunmap(kiov[i].kiov_page);
640 ksocknal_lib_eager_ack (ksock_conn_t *conn)
643 mm_segment_t oldmm = get_fs();
644 struct socket *sock = conn->ksnc_sock;
646 /* Remind the socket to ACK eagerly. If I don't, the socket might
647 * think I'm about to send something it could piggy-back the ACK
648 * on, introducing delay in completing zero-copy sends in my
652 sock->ops->setsockopt (sock, SOL_TCP, TCP_QUICKACK,
653 (char *)&opt, sizeof (opt));
658 ksocknal_lib_recv_iov (ksock_conn_t *conn)
660 #if SOCKNAL_SINGLE_FRAG_RX
661 struct iovec scratch;
662 struct iovec *scratchiov = &scratch;
663 unsigned int niov = 1;
665 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
666 unsigned int niov = conn->ksnc_rx_niov;
668 struct iovec *iov = conn->ksnc_rx_iov;
669 struct msghdr msg = {
672 .msg_iov = scratchiov,
678 mm_segment_t oldmm = get_fs();
686 /* NB we can't trust socket ops to either consume our iovs
687 * or leave them alone. */
690 for (nob = i = 0; i < niov; i++) {
691 scratchiov[i] = iov[i];
692 nob += scratchiov[i].iov_len;
694 LASSERT (nob <= conn->ksnc_rx_nob_wanted);
697 rc = sock_recvmsg (conn->ksnc_sock, &msg, nob, MSG_DONTWAIT);
698 /* NB this is just a boolean..........................^ */
702 if (conn->ksnc_proto == &ksocknal_protocol_v2x) {
703 saved_csum = conn->ksnc_msg.ksm_csum;
704 conn->ksnc_msg.ksm_csum = 0;
707 if (saved_csum != 0) {
708 /* accumulate checksum */
709 for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
712 fragnob = iov[i].iov_len;
716 conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
717 iov[i].iov_base, fragnob);
719 conn->ksnc_msg.ksm_csum = saved_csum;
726 ksocknal_lib_kiov_vunmap(void *addr)
735 ksocknal_lib_kiov_vmap(lnet_kiov_t *kiov, int niov,
736 struct iovec *iov, struct page **pages)
742 if (!*ksocknal_tunables.ksnd_zc_recv || pages == NULL)
745 LASSERT (niov <= LNET_MAX_IOV);
748 niov < *ksocknal_tunables.ksnd_zc_recv_min_nfrags)
751 for (nob = i = 0; i < niov; i++) {
752 if ((kiov[i].kiov_offset != 0 && i > 0) ||
753 (kiov[i].kiov_offset + kiov[i].kiov_len != CFS_PAGE_SIZE && i < niov - 1))
756 pages[i] = kiov[i].kiov_page;
757 nob += kiov[i].kiov_len;
760 addr = vmap(pages, niov, VM_MAP, PAGE_KERNEL);
764 iov->iov_base = addr + kiov[0].kiov_offset;
771 ksocknal_lib_recv_kiov (ksock_conn_t *conn)
773 #if SOCKNAL_SINGLE_FRAG_RX || !SOCKNAL_RISK_KMAP_DEADLOCK
774 struct iovec scratch;
775 struct iovec *scratchiov = &scratch;
776 struct page **pages = NULL;
777 unsigned int niov = 1;
779 #ifdef CONFIG_HIGHMEM
780 #warning "XXX risk of kmap deadlock on multiple frags..."
782 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
783 struct page **pages = conn->ksnc_scheduler->kss_rx_scratch_pgs;
784 unsigned int niov = conn->ksnc_rx_nkiov;
786 lnet_kiov_t *kiov = conn->ksnc_rx_kiov;
787 struct msghdr msg = {
790 .msg_iov = scratchiov,
795 mm_segment_t oldmm = get_fs();
804 /* NB we can't trust socket ops to either consume our iovs
805 * or leave them alone. */
806 if ((addr = ksocknal_lib_kiov_vmap(kiov, niov, scratchiov, pages)) != NULL) {
807 nob = scratchiov[0].iov_len;
811 for (nob = i = 0; i < niov; i++) {
812 nob += scratchiov[i].iov_len = kiov[i].kiov_len;
813 scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
816 msg.msg_iovlen = niov;
819 LASSERT (nob <= conn->ksnc_rx_nob_wanted);
822 rc = sock_recvmsg (conn->ksnc_sock, &msg, nob, MSG_DONTWAIT);
823 /* NB this is just a boolean.......................^ */
826 if (conn->ksnc_msg.ksm_csum != 0) {
827 for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
830 /* Dang! have to kmap again because I have nowhere to stash the
831 * mapped address. But by doing it while the page is still
832 * mapped, the kernel just bumps the map count and returns me
833 * the address it stashed. */
834 base = kmap(kiov[i].kiov_page) + kiov[i].kiov_offset;
835 fragnob = kiov[i].kiov_len;
839 conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
842 kunmap(kiov[i].kiov_page);
847 ksocknal_lib_kiov_vunmap(addr);
849 for (i = 0; i < niov; i++)
850 kunmap(kiov[i].kiov_page);
857 ksocknal_lib_csum_tx(ksock_tx_t *tx)
863 LASSERT(tx->tx_iov[0].iov_base == (void *)&tx->tx_msg);
864 LASSERT(tx->tx_conn != NULL);
865 LASSERT(tx->tx_conn->ksnc_proto == &ksocknal_protocol_v2x);
867 tx->tx_msg.ksm_csum = 0;
869 csum = ksocknal_csum(~0, (void *)tx->tx_iov[0].iov_base,
870 tx->tx_iov[0].iov_len);
872 if (tx->tx_kiov != NULL) {
873 for (i = 0; i < tx->tx_nkiov; i++) {
874 base = kmap(tx->tx_kiov[i].kiov_page) +
875 tx->tx_kiov[i].kiov_offset;
877 csum = ksocknal_csum(csum, base, tx->tx_kiov[i].kiov_len);
879 kunmap(tx->tx_kiov[i].kiov_page);
882 for (i = 1; i < tx->tx_niov; i++)
883 csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
884 tx->tx_iov[i].iov_len);
887 if (*ksocknal_tunables.ksnd_inject_csum_error) {
889 *ksocknal_tunables.ksnd_inject_csum_error = 0;
892 tx->tx_msg.ksm_csum = csum;
896 ksocknal_lib_get_conn_tunables (ksock_conn_t *conn, int *txmem, int *rxmem, int *nagle)
898 mm_segment_t oldmm = get_fs ();
899 struct socket *sock = conn->ksnc_sock;
903 rc = ksocknal_connsock_addref(conn);
905 LASSERT (conn->ksnc_closing);
906 *txmem = *rxmem = *nagle = 0;
910 rc = libcfs_sock_getbuf(sock, txmem, rxmem);
912 len = sizeof(*nagle);
914 rc = sock->ops->getsockopt(sock, SOL_TCP, TCP_NODELAY,
915 (char *)nagle, &len);
919 ksocknal_connsock_decref(conn);
924 *txmem = *rxmem = *nagle = 0;
930 ksocknal_lib_setup_sock (struct socket *sock)
932 mm_segment_t oldmm = get_fs ();
939 struct linger linger;
941 sock->sk->sk_allocation = GFP_NOFS;
943 /* Ensure this socket aborts active sends immediately when we close
950 rc = sock_setsockopt (sock, SOL_SOCKET, SO_LINGER,
951 (char *)&linger, sizeof (linger));
954 CERROR ("Can't set SO_LINGER: %d\n", rc);
960 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_LINGER2,
961 (char *)&option, sizeof (option));
964 CERROR ("Can't set SO_LINGER2: %d\n", rc);
968 if (!*ksocknal_tunables.ksnd_nagle) {
972 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_NODELAY,
973 (char *)&option, sizeof (option));
976 CERROR ("Can't disable nagle: %d\n", rc);
981 rc = libcfs_sock_setbuf(sock,
982 *ksocknal_tunables.ksnd_tx_buffer_size,
983 *ksocknal_tunables.ksnd_rx_buffer_size);
985 CERROR ("Can't set buffer tx %d, rx %d buffers: %d\n",
986 *ksocknal_tunables.ksnd_tx_buffer_size,
987 *ksocknal_tunables.ksnd_rx_buffer_size, rc);
991 /* TCP_BACKOFF_* sockopt tunables unsupported in stock kernels */
992 #ifdef SOCKNAL_BACKOFF
993 if (*ksocknal_tunables.ksnd_backoff_init > 0) {
994 option = *ksocknal_tunables.ksnd_backoff_init;
995 #ifdef SOCKNAL_BACKOFF_MS
1000 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_INIT,
1001 (char *)&option, sizeof (option));
1004 CERROR ("Can't set initial tcp backoff %d: %d\n",
1010 if (*ksocknal_tunables.ksnd_backoff_max > 0) {
1011 option = *ksocknal_tunables.ksnd_backoff_max;
1012 #ifdef SOCKNAL_BACKOFF_MS
1017 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_MAX,
1018 (char *)&option, sizeof (option));
1021 CERROR ("Can't set maximum tcp backoff %d: %d\n",
1028 /* snapshot tunables */
1029 keep_idle = *ksocknal_tunables.ksnd_keepalive_idle;
1030 keep_count = *ksocknal_tunables.ksnd_keepalive_count;
1031 keep_intvl = *ksocknal_tunables.ksnd_keepalive_intvl;
1033 do_keepalive = (keep_idle > 0 && keep_count > 0 && keep_intvl > 0);
1035 option = (do_keepalive ? 1 : 0);
1037 rc = sock_setsockopt (sock, SOL_SOCKET, SO_KEEPALIVE,
1038 (char *)&option, sizeof (option));
1041 CERROR ("Can't set SO_KEEPALIVE: %d\n", rc);
1049 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPIDLE,
1050 (char *)&keep_idle, sizeof (keep_idle));
1053 CERROR ("Can't set TCP_KEEPIDLE: %d\n", rc);
1058 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPINTVL,
1059 (char *)&keep_intvl, sizeof (keep_intvl));
1062 CERROR ("Can't set TCP_KEEPINTVL: %d\n", rc);
1067 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPCNT,
1068 (char *)&keep_count, sizeof (keep_count));
1071 CERROR ("Can't set TCP_KEEPCNT: %d\n", rc);
1078 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1079 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1081 return &(sk->tp_pinfo.af_tcp);
1083 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
1084 #define sock2tcp_opt(sk) tcp_sk(sk)
1086 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1088 struct tcp_sock *s = (struct tcp_sock *)sk;
1094 ksocknal_lib_push_conn (ksock_conn_t *conn)
1097 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11))
1100 struct tcp_sock *tp;
1107 rc = ksocknal_connsock_addref(conn);
1108 if (rc != 0) /* being shut down */
1111 sk = conn->ksnc_sock->sk;
1112 tp = sock2tcp_opt(sk);
1115 nonagle = tp->nonagle;
1122 rc = sk->sk_prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
1123 (char *)&val, sizeof (val));
1129 tp->nonagle = nonagle;
1132 ksocknal_connsock_decref(conn);
1135 extern void ksocknal_read_callback (ksock_conn_t *conn);
1136 extern void ksocknal_write_callback (ksock_conn_t *conn);
1138 * socket call back in Linux
1141 ksocknal_data_ready (struct sock *sk, int n)
1146 /* interleave correctly with closing sockets... */
1148 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1150 conn = sk->sk_user_data;
1151 if (conn == NULL) { /* raced with ksocknal_terminate_conn */
1152 LASSERT (sk->sk_data_ready != &ksocknal_data_ready);
1153 sk->sk_data_ready (sk, n);
1155 ksocknal_read_callback(conn);
1157 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1163 ksocknal_write_space (struct sock *sk)
1169 /* interleave correctly with closing sockets... */
1171 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1173 conn = sk->sk_user_data;
1174 wspace = SOCKNAL_WSPACE(sk);
1175 min_wpace = SOCKNAL_MIN_WSPACE(sk);
1177 CDEBUG(D_NET, "sk %p wspace %d low water %d conn %p%s%s%s\n",
1178 sk, wspace, min_wpace, conn,
1179 (conn == NULL) ? "" : (conn->ksnc_tx_ready ?
1180 " ready" : " blocked"),
1181 (conn == NULL) ? "" : (conn->ksnc_tx_scheduled ?
1182 " scheduled" : " idle"),
1183 (conn == NULL) ? "" : (list_empty (&conn->ksnc_tx_queue) ?
1184 " empty" : " queued"));
1186 if (conn == NULL) { /* raced with ksocknal_terminate_conn */
1187 LASSERT (sk->sk_write_space != &ksocknal_write_space);
1188 sk->sk_write_space (sk);
1190 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1194 if (wspace >= min_wpace) { /* got enough space */
1195 ksocknal_write_callback(conn);
1197 /* Clear SOCK_NOSPACE _after_ ksocknal_write_callback so the
1198 * ENOMEM check in ksocknal_transmit is race-free (think about
1201 clear_bit (SOCK_NOSPACE, &sk->sk_socket->flags);
1204 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1208 ksocknal_lib_save_callback(struct socket *sock, ksock_conn_t *conn)
1210 conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
1211 conn->ksnc_saved_write_space = sock->sk->sk_write_space;
1215 ksocknal_lib_set_callback(struct socket *sock, ksock_conn_t *conn)
1217 sock->sk->sk_user_data = conn;
1218 sock->sk->sk_data_ready = ksocknal_data_ready;
1219 sock->sk->sk_write_space = ksocknal_write_space;
1224 ksocknal_lib_reset_callback(struct socket *sock, ksock_conn_t *conn)
1226 /* Remove conn's network callbacks.
1227 * NB I _have_ to restore the callback, rather than storing a noop,
1228 * since the socket could survive past this module being unloaded!! */
1229 sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
1230 sock->sk->sk_write_space = conn->ksnc_saved_write_space;
1232 /* A callback could be in progress already; they hold a read lock
1233 * on ksnd_global_lock (to serialise with me) and NOOP if
1234 * sk_user_data is NULL. */
1235 sock->sk->sk_user_data = NULL;
1241 ksocknal_lib_memory_pressure(ksock_conn_t *conn)
1244 ksock_sched_t *sched;
1246 sched = conn->ksnc_scheduler;
1247 cfs_spin_lock_bh (&sched->kss_lock);
1249 if (!SOCK_TEST_NOSPACE(conn->ksnc_sock) &&
1250 !conn->ksnc_tx_ready) {
1251 /* SOCK_NOSPACE is set when the socket fills
1252 * and cleared in the write_space callback
1253 * (which also sets ksnc_tx_ready). If
1254 * SOCK_NOSPACE and ksnc_tx_ready are BOTH
1255 * zero, I didn't fill the socket and
1256 * write_space won't reschedule me, so I
1257 * return -ENOMEM to get my caller to retry
1258 * after a timeout */
1262 cfs_spin_unlock_bh (&sched->kss_lock);
1268 ksocknal_lib_bind_thread_to_cpu(int id)
1270 #if defined(CONFIG_SMP) && defined(CPU_AFFINITY)
1271 id = ksocknal_sched2cpu(id);
1272 if (cpu_online(id)) {
1273 cpumask_t m = CPU_MASK_NONE;
1275 set_cpus_allowed(current, m);