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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
41 # if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
43 #ifndef HAVE_SYSCTL_UNNUMBERED
48 SOCKLND_PEER_TXCREDITS,
49 SOCKLND_PEER_RTRCREDITS,
52 SOCKLND_RECONNECTS_MIN,
53 SOCKLND_RECONNECTS_MAX,
58 SOCKLND_RX_BUFFER_SIZE,
59 SOCKLND_TX_BUFFER_SIZE,
64 SOCKLND_KEEPALIVE_IDLE,
65 SOCKLND_KEEPALIVE_COUNT,
66 SOCKLND_KEEPALIVE_INTVL,
70 SOCKLND_ZERO_COPY_RECV,
71 SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS
75 #define SOCKLND_TIMEOUT CTL_UNNUMBERED
76 #define SOCKLND_CREDITS CTL_UNNUMBERED
77 #define SOCKLND_PEER_TXCREDITS CTL_UNNUMBERED
78 #define SOCKLND_PEER_RTRCREDITS CTL_UNNUMBERED
79 #define SOCKLND_PEER_TIMEOUT CTL_UNNUMBERED
80 #define SOCKLND_NCONNDS CTL_UNNUMBERED
81 #define SOCKLND_RECONNECTS_MIN CTL_UNNUMBERED
82 #define SOCKLND_RECONNECTS_MAX CTL_UNNUMBERED
83 #define SOCKLND_EAGER_ACK CTL_UNNUMBERED
84 #define SOCKLND_ZERO_COPY CTL_UNNUMBERED
85 #define SOCKLND_TYPED CTL_UNNUMBERED
86 #define SOCKLND_BULK_MIN CTL_UNNUMBERED
87 #define SOCKLND_RX_BUFFER_SIZE CTL_UNNUMBERED
88 #define SOCKLND_TX_BUFFER_SIZE CTL_UNNUMBERED
89 #define SOCKLND_NAGLE CTL_UNNUMBERED
90 #define SOCKLND_IRQ_AFFINITY CTL_UNNUMBERED
91 #define SOCKLND_ROUND_ROBIN CTL_UNNUMBERED
92 #define SOCKLND_KEEPALIVE CTL_UNNUMBERED
93 #define SOCKLND_KEEPALIVE_IDLE CTL_UNNUMBERED
94 #define SOCKLND_KEEPALIVE_COUNT CTL_UNNUMBERED
95 #define SOCKLND_KEEPALIVE_INTVL CTL_UNNUMBERED
96 #define SOCKLND_BACKOFF_INIT CTL_UNNUMBERED
97 #define SOCKLND_BACKOFF_MAX CTL_UNNUMBERED
98 #define SOCKLND_PROTOCOL CTL_UNNUMBERED
99 #define SOCKLND_ZERO_COPY_RECV CTL_UNNUMBERED
100 #define SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS CTL_UNNUMBERED
103 static cfs_sysctl_table_t ksocknal_ctl_table[] = {
105 .ctl_name = SOCKLND_TIMEOUT,
106 .procname = "timeout",
107 .data = &ksocknal_tunables.ksnd_timeout,
108 .maxlen = sizeof (int),
110 .proc_handler = &proc_dointvec,
111 .strategy = &sysctl_intvec,
114 .ctl_name = SOCKLND_CREDITS,
115 .procname = "credits",
116 .data = &ksocknal_tunables.ksnd_credits,
117 .maxlen = sizeof (int),
119 .proc_handler = &proc_dointvec,
120 .strategy = &sysctl_intvec,
123 .ctl_name = SOCKLND_PEER_TXCREDITS,
124 .procname = "peer_credits",
125 .data = &ksocknal_tunables.ksnd_peertxcredits,
126 .maxlen = sizeof (int),
128 .proc_handler = &proc_dointvec,
129 .strategy = &sysctl_intvec,
132 .ctl_name = SOCKLND_PEER_RTRCREDITS,
133 .procname = "peer_buffer_credits",
134 .data = &ksocknal_tunables.ksnd_peerrtrcredits,
135 .maxlen = sizeof (int),
137 .proc_handler = &proc_dointvec,
138 .strategy = &sysctl_intvec,
141 .ctl_name = SOCKLND_PEER_TIMEOUT,
142 .procname = "peer_timeout",
143 .data = &ksocknal_tunables.ksnd_peertimeout,
144 .maxlen = sizeof (int),
146 .proc_handler = &proc_dointvec
147 .strategy = &sysctl_intvec,
150 .ctl_name = SOCKLND_NCONNDS,
151 .procname = "nconnds",
152 .data = &ksocknal_tunables.ksnd_nconnds,
153 .maxlen = sizeof (int),
155 .proc_handler = &proc_dointvec,
156 .strategy = &sysctl_intvec,
159 .ctl_name = SOCKLND_RECONNECTS_MIN,
160 .procname = "min_reconnectms",
161 .data = &ksocknal_tunables.ksnd_min_reconnectms,
162 .maxlen = sizeof (int),
164 .proc_handler = &proc_dointvec,
165 .strategy = &sysctl_intvec,
168 .ctl_name = SOCKLND_RECONNECTS_MAX,
169 .procname = "max_reconnectms",
170 .data = &ksocknal_tunables.ksnd_max_reconnectms,
171 .maxlen = sizeof (int),
173 .proc_handler = &proc_dointvec,
174 .strategy = &sysctl_intvec,
177 .ctl_name = SOCKLND_EAGER_ACK,
178 .procname = "eager_ack",
179 .data = &ksocknal_tunables.ksnd_eager_ack,
180 .maxlen = sizeof (int),
182 .proc_handler = &proc_dointvec,
183 .strategy = &sysctl_intvec,
186 .ctl_name = SOCKLND_ZERO_COPY,
187 .procname = "zero_copy",
188 .data = &ksocknal_tunables.ksnd_zc_min_payload,
189 .maxlen = sizeof (int),
191 .proc_handler = &proc_dointvec,
192 .strategy = &sysctl_intvec,
195 .ctl_name = SOCKLND_ZERO_COPY_RECV,
196 .procname = "zero_copy_recv",
197 .data = &ksocknal_tunables.ksnd_zc_recv,
198 .maxlen = sizeof (int),
200 .proc_handler = &proc_dointvec,
201 .strategy = &sysctl_intvec,
205 .ctl_name = SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS,
206 .procname = "zero_copy_recv",
207 .data = &ksocknal_tunables.ksnd_zc_recv_min_nfrags,
208 .maxlen = sizeof (int),
210 .proc_handler = &proc_dointvec,
211 .strategy = &sysctl_intvec,
214 .ctl_name = SOCKLND_TYPED,
216 .data = &ksocknal_tunables.ksnd_typed_conns,
217 .maxlen = sizeof (int),
219 .proc_handler = &proc_dointvec,
220 .strategy = &sysctl_intvec,
223 .ctl_name = SOCKLND_BULK_MIN,
224 .procname = "min_bulk",
225 .data = &ksocknal_tunables.ksnd_min_bulk,
226 .maxlen = sizeof (int),
228 .proc_handler = &proc_dointvec,
229 .strategy = &sysctl_intvec,
232 .ctl_name = SOCKLND_RX_BUFFER_SIZE,
233 .procname = "rx_buffer_size",
234 .data = &ksocknal_tunables.ksnd_rx_buffer_size,
235 .maxlen = sizeof(int),
237 .proc_handler = &proc_dointvec,
238 .strategy = &sysctl_intvec,
241 .ctl_name = SOCKLND_TX_BUFFER_SIZE,
242 .procname = "tx_buffer_size",
243 .data = &ksocknal_tunables.ksnd_tx_buffer_size,
244 .maxlen = sizeof(int),
246 .proc_handler = &proc_dointvec,
247 .strategy = &sysctl_intvec,
250 .ctl_name = SOCKLND_NAGLE,
252 .data = &ksocknal_tunables.ksnd_nagle,
253 .maxlen = sizeof(int),
255 .proc_handler = &proc_dointvec,
256 .strategy = &sysctl_intvec,
260 .ctl_name = SOCKLND_IRQ_AFFINITY,
261 .procname = "irq_affinity",
262 .data = &ksocknal_tunables.ksnd_irq_affinity,
263 .maxlen = sizeof(int),
265 .proc_handler = &proc_dointvec,
266 .strategy = &sysctl_intvec,
270 .ctl_name = SOCKLND_ROUND_ROBIN,
271 .procname = "round_robin",
272 .data = &ksocknal_tunables.ksnd_round_robin,
273 .maxlen = sizeof(int),
275 .proc_handler = &proc_dointvec,
276 .strategy = &sysctl_intvec,
279 .ctl_name = SOCKLND_KEEPALIVE,
280 .procname = "keepalive",
281 .data = &ksocknal_tunables.ksnd_keepalive,
282 .maxlen = sizeof(int),
284 .proc_handler = &proc_dointvec,
285 .strategy = &sysctl_intvec,
288 .ctl_name = SOCKLND_KEEPALIVE_IDLE,
289 .procname = "keepalive_idle",
290 .data = &ksocknal_tunables.ksnd_keepalive_idle,
291 .maxlen = sizeof(int),
293 .proc_handler = &proc_dointvec,
294 .strategy = &sysctl_intvec,
297 .ctl_name = SOCKLND_KEEPALIVE_COUNT,
298 .procname = "keepalive_count",
299 .data = &ksocknal_tunables.ksnd_keepalive_count,
300 .maxlen = sizeof(int),
302 .proc_handler = &proc_dointvec,
303 .strategy = &sysctl_intvec,
306 .ctl_name = SOCKLND_KEEPALIVE_INTVL,
307 .procname = "keepalive_intvl",
308 .data = &ksocknal_tunables.ksnd_keepalive_intvl,
309 .maxlen = sizeof(int),
311 .proc_handler = &proc_dointvec,
312 .strategy = &sysctl_intvec,
314 #ifdef SOCKNAL_BACKOFF
316 .ctl_name = SOCKLND_BACKOFF_INIT,
317 .procname = "backoff_init",
318 .data = &ksocknal_tunables.ksnd_backoff_init,
319 .maxlen = sizeof(int),
321 .proc_handler = &proc_dointvec,
322 .strategy = &sysctl_intvec,
325 .ctl_name = SOCKLND_BACKOFF_MAX,
326 .procname = "backoff_max",
327 .data = &ksocknal_tunables.ksnd_backoff_max,
328 .maxlen = sizeof(int),
330 .proc_handler = &proc_dointvec,
331 .strategy = &sysctl_intvec,
334 #if SOCKNAL_VERSION_DEBUG
336 .ctl_name = SOCKLND_PROTOCOL,
337 .procname = "protocol",
338 .data = &ksocknal_tunables.ksnd_protocol,
339 .maxlen = sizeof(int),
341 .proc_handler = &proc_dointvec,
342 .strategy = &sysctl_intvec,
349 cfs_sysctl_table_t ksocknal_top_ctl_table[] = {
351 .ctl_name = CTL_SOCKLND,
352 .procname = "socknal",
356 .child = ksocknal_ctl_table
362 ksocknal_lib_tunables_init ()
364 if (!*ksocknal_tunables.ksnd_typed_conns) {
366 #if SOCKNAL_VERSION_DEBUG
367 if (*ksocknal_tunables.ksnd_protocol < 3)
371 CERROR("Protocol V3.x MUST have typed connections\n");
376 if (*ksocknal_tunables.ksnd_zc_recv_min_nfrags < 2)
377 *ksocknal_tunables.ksnd_zc_recv_min_nfrags = 2;
378 if (*ksocknal_tunables.ksnd_zc_recv_min_nfrags > LNET_MAX_IOV)
379 *ksocknal_tunables.ksnd_zc_recv_min_nfrags = LNET_MAX_IOV;
381 ksocknal_tunables.ksnd_sysctl =
382 cfs_register_sysctl_table(ksocknal_top_ctl_table, 0);
384 if (ksocknal_tunables.ksnd_sysctl == NULL)
385 CWARN("Can't setup /proc tunables\n");
391 ksocknal_lib_tunables_fini ()
393 if (ksocknal_tunables.ksnd_sysctl != NULL)
394 cfs_unregister_sysctl_table(ksocknal_tunables.ksnd_sysctl);
398 ksocknal_lib_tunables_init ()
404 ksocknal_lib_tunables_fini ()
407 #endif /* # if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM */
410 ksocknal_lib_bind_irq (unsigned int irq)
412 #if (defined(CONFIG_SMP) && defined(CPU_AFFINITY))
416 ksock_irqinfo_t *info;
417 char *argv[] = {"/bin/sh",
421 char *envp[] = {"HOME=/",
422 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
425 LASSERT (irq < NR_IRQS);
426 if (irq == 0) /* software NIC or affinity disabled */
429 info = &ksocknal_data.ksnd_irqinfo[irq];
431 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
433 LASSERT (info->ksni_valid);
434 bind = !info->ksni_bound;
435 info->ksni_bound = 1;
437 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
439 if (!bind) /* bound already */
442 cpu = ksocknal_irqsched2cpu(info->ksni_sched);
443 snprintf (cmdline, sizeof (cmdline),
444 "echo %d > /proc/irq/%u/smp_affinity", 1 << cpu, irq);
446 LCONSOLE_INFO("Binding irq %u to CPU %d with cmd: %s\n",
449 /* FIXME: Find a better method of setting IRQ affinity...
452 USERMODEHELPER(argv[0], argv, envp);
457 ksocknal_lib_get_conn_addrs (ksock_conn_t *conn)
459 int rc = libcfs_sock_getaddr(conn->ksnc_sock, 1,
463 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
464 LASSERT (!conn->ksnc_closing);
467 CERROR ("Error %d getting sock peer IP\n", rc);
471 rc = libcfs_sock_getaddr(conn->ksnc_sock, 0,
472 &conn->ksnc_myipaddr, NULL);
474 CERROR ("Error %d getting sock local IP\n", rc);
482 ksocknal_lib_sock_irq (struct socket *sock)
486 struct dst_entry *dst;
488 if (!*ksocknal_tunables.ksnd_irq_affinity)
491 dst = sk_dst_get (sock->sk);
493 if (dst->dev != NULL) {
495 if (irq >= NR_IRQS) {
496 CERROR ("Unexpected IRQ %x\n", irq);
508 ksocknal_lib_zc_capable(ksock_conn_t *conn)
510 int caps = conn->ksnc_sock->sk->sk_route_caps;
512 if (conn->ksnc_proto == &ksocknal_protocol_v1x)
515 /* ZC if the socket supports scatter/gather and doesn't need software
517 return ((caps & NETIF_F_SG) != 0 &&
518 (caps & (NETIF_F_IP_CSUM | NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)) != 0);
522 ksocknal_lib_send_iov (ksock_conn_t *conn, ksock_tx_t *tx)
524 struct socket *sock = conn->ksnc_sock;
528 if (*ksocknal_tunables.ksnd_enable_csum && /* checksum enabled */
529 conn->ksnc_proto == &ksocknal_protocol_v2x && /* V2.x connection */
530 tx->tx_nob == tx->tx_resid && /* frist sending */
531 tx->tx_msg.ksm_csum == 0) /* not checksummed */
532 ksocknal_lib_csum_tx(tx);
534 /* NB we can't trust socket ops to either consume our iovs
535 * or leave them alone. */
538 #if SOCKNAL_SINGLE_FRAG_TX
539 struct iovec scratch;
540 struct iovec *scratchiov = &scratch;
541 unsigned int niov = 1;
543 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
544 unsigned int niov = tx->tx_niov;
546 struct msghdr msg = {
549 .msg_iov = scratchiov,
553 .msg_flags = MSG_DONTWAIT
555 mm_segment_t oldmm = get_fs();
558 for (nob = i = 0; i < niov; i++) {
559 scratchiov[i] = tx->tx_iov[i];
560 nob += scratchiov[i].iov_len;
563 if (!cfs_list_empty(&conn->ksnc_tx_queue) ||
565 msg.msg_flags |= MSG_MORE;
568 rc = sock_sendmsg(sock, &msg, nob);
575 ksocknal_lib_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx)
577 struct socket *sock = conn->ksnc_sock;
578 lnet_kiov_t *kiov = tx->tx_kiov;
582 /* Not NOOP message */
583 LASSERT (tx->tx_lnetmsg != NULL);
585 /* NB we can't trust socket ops to either consume our iovs
586 * or leave them alone. */
587 if (tx->tx_msg.ksm_zc_cookies[0] != 0) {
588 /* Zero copy is enabled */
589 struct sock *sk = sock->sk;
590 struct page *page = kiov->kiov_page;
591 int offset = kiov->kiov_offset;
592 int fragsize = kiov->kiov_len;
593 int msgflg = MSG_DONTWAIT;
595 CDEBUG(D_NET, "page %p + offset %x for %d\n",
596 page, offset, kiov->kiov_len);
598 if (!cfs_list_empty(&conn->ksnc_tx_queue) ||
599 fragsize < tx->tx_resid)
602 if (sk->sk_prot->sendpage != NULL) {
603 rc = sk->sk_prot->sendpage(sk, page,
604 offset, fragsize, msgflg);
606 rc = cfs_tcp_sendpage(sk, page, offset, fragsize,
610 #if SOCKNAL_SINGLE_FRAG_TX || !SOCKNAL_RISK_KMAP_DEADLOCK
611 struct iovec scratch;
612 struct iovec *scratchiov = &scratch;
613 unsigned int niov = 1;
615 #ifdef CONFIG_HIGHMEM
616 #warning "XXX risk of kmap deadlock on multiple frags..."
618 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
619 unsigned int niov = tx->tx_nkiov;
621 struct msghdr msg = {
624 .msg_iov = scratchiov,
628 .msg_flags = MSG_DONTWAIT
630 mm_segment_t oldmm = get_fs();
633 for (nob = i = 0; i < niov; i++) {
634 scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
636 nob += scratchiov[i].iov_len = kiov[i].kiov_len;
639 if (!cfs_list_empty(&conn->ksnc_tx_queue) ||
641 msg.msg_flags |= MSG_MORE;
644 rc = sock_sendmsg(sock, &msg, nob);
647 for (i = 0; i < niov; i++)
648 kunmap(kiov[i].kiov_page);
654 ksocknal_lib_eager_ack (ksock_conn_t *conn)
657 mm_segment_t oldmm = get_fs();
658 struct socket *sock = conn->ksnc_sock;
660 /* Remind the socket to ACK eagerly. If I don't, the socket might
661 * think I'm about to send something it could piggy-back the ACK
662 * on, introducing delay in completing zero-copy sends in my
666 sock->ops->setsockopt (sock, SOL_TCP, TCP_QUICKACK,
667 (char *)&opt, sizeof (opt));
672 ksocknal_lib_recv_iov (ksock_conn_t *conn)
674 #if SOCKNAL_SINGLE_FRAG_RX
675 struct iovec scratch;
676 struct iovec *scratchiov = &scratch;
677 unsigned int niov = 1;
679 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
680 unsigned int niov = conn->ksnc_rx_niov;
682 struct iovec *iov = conn->ksnc_rx_iov;
683 struct msghdr msg = {
686 .msg_iov = scratchiov,
692 mm_segment_t oldmm = get_fs();
700 /* NB we can't trust socket ops to either consume our iovs
701 * or leave them alone. */
704 for (nob = i = 0; i < niov; i++) {
705 scratchiov[i] = iov[i];
706 nob += scratchiov[i].iov_len;
708 LASSERT (nob <= conn->ksnc_rx_nob_wanted);
711 rc = sock_recvmsg (conn->ksnc_sock, &msg, nob, MSG_DONTWAIT);
712 /* NB this is just a boolean..........................^ */
716 if (conn->ksnc_proto == &ksocknal_protocol_v2x) {
717 saved_csum = conn->ksnc_msg.ksm_csum;
718 conn->ksnc_msg.ksm_csum = 0;
721 if (saved_csum != 0) {
722 /* accumulate checksum */
723 for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
726 fragnob = iov[i].iov_len;
730 conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
731 iov[i].iov_base, fragnob);
733 conn->ksnc_msg.ksm_csum = saved_csum;
740 ksocknal_lib_kiov_vunmap(void *addr)
749 ksocknal_lib_kiov_vmap(lnet_kiov_t *kiov, int niov,
750 struct iovec *iov, struct page **pages)
756 if (!*ksocknal_tunables.ksnd_zc_recv || pages == NULL)
759 LASSERT (niov <= LNET_MAX_IOV);
762 niov < *ksocknal_tunables.ksnd_zc_recv_min_nfrags)
765 for (nob = i = 0; i < niov; i++) {
766 if ((kiov[i].kiov_offset != 0 && i > 0) ||
767 (kiov[i].kiov_offset + kiov[i].kiov_len != CFS_PAGE_SIZE && i < niov - 1))
770 pages[i] = kiov[i].kiov_page;
771 nob += kiov[i].kiov_len;
774 addr = vmap(pages, niov, VM_MAP, PAGE_KERNEL);
778 iov->iov_base = addr + kiov[0].kiov_offset;
785 ksocknal_lib_recv_kiov (ksock_conn_t *conn)
787 #if SOCKNAL_SINGLE_FRAG_RX || !SOCKNAL_RISK_KMAP_DEADLOCK
788 struct iovec scratch;
789 struct iovec *scratchiov = &scratch;
790 struct page **pages = NULL;
791 unsigned int niov = 1;
793 #ifdef CONFIG_HIGHMEM
794 #warning "XXX risk of kmap deadlock on multiple frags..."
796 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
797 struct page **pages = conn->ksnc_scheduler->kss_rx_scratch_pgs;
798 unsigned int niov = conn->ksnc_rx_nkiov;
800 lnet_kiov_t *kiov = conn->ksnc_rx_kiov;
801 struct msghdr msg = {
804 .msg_iov = scratchiov,
809 mm_segment_t oldmm = get_fs();
818 /* NB we can't trust socket ops to either consume our iovs
819 * or leave them alone. */
820 if ((addr = ksocknal_lib_kiov_vmap(kiov, niov, scratchiov, pages)) != NULL) {
821 nob = scratchiov[0].iov_len;
825 for (nob = i = 0; i < niov; i++) {
826 nob += scratchiov[i].iov_len = kiov[i].kiov_len;
827 scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
830 msg.msg_iovlen = niov;
833 LASSERT (nob <= conn->ksnc_rx_nob_wanted);
836 rc = sock_recvmsg (conn->ksnc_sock, &msg, nob, MSG_DONTWAIT);
837 /* NB this is just a boolean.......................^ */
840 if (conn->ksnc_msg.ksm_csum != 0) {
841 for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
844 /* Dang! have to kmap again because I have nowhere to stash the
845 * mapped address. But by doing it while the page is still
846 * mapped, the kernel just bumps the map count and returns me
847 * the address it stashed. */
848 base = kmap(kiov[i].kiov_page) + kiov[i].kiov_offset;
849 fragnob = kiov[i].kiov_len;
853 conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
856 kunmap(kiov[i].kiov_page);
861 ksocknal_lib_kiov_vunmap(addr);
863 for (i = 0; i < niov; i++)
864 kunmap(kiov[i].kiov_page);
871 ksocknal_lib_csum_tx(ksock_tx_t *tx)
877 LASSERT(tx->tx_iov[0].iov_base == (void *)&tx->tx_msg);
878 LASSERT(tx->tx_conn != NULL);
879 LASSERT(tx->tx_conn->ksnc_proto == &ksocknal_protocol_v2x);
881 tx->tx_msg.ksm_csum = 0;
883 csum = ksocknal_csum(~0, (void *)tx->tx_iov[0].iov_base,
884 tx->tx_iov[0].iov_len);
886 if (tx->tx_kiov != NULL) {
887 for (i = 0; i < tx->tx_nkiov; i++) {
888 base = kmap(tx->tx_kiov[i].kiov_page) +
889 tx->tx_kiov[i].kiov_offset;
891 csum = ksocknal_csum(csum, base, tx->tx_kiov[i].kiov_len);
893 kunmap(tx->tx_kiov[i].kiov_page);
896 for (i = 1; i < tx->tx_niov; i++)
897 csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
898 tx->tx_iov[i].iov_len);
901 if (*ksocknal_tunables.ksnd_inject_csum_error) {
903 *ksocknal_tunables.ksnd_inject_csum_error = 0;
906 tx->tx_msg.ksm_csum = csum;
910 ksocknal_lib_get_conn_tunables (ksock_conn_t *conn, int *txmem, int *rxmem, int *nagle)
912 mm_segment_t oldmm = get_fs ();
913 struct socket *sock = conn->ksnc_sock;
917 rc = ksocknal_connsock_addref(conn);
919 LASSERT (conn->ksnc_closing);
920 *txmem = *rxmem = *nagle = 0;
924 rc = libcfs_sock_getbuf(sock, txmem, rxmem);
926 len = sizeof(*nagle);
928 rc = sock->ops->getsockopt(sock, SOL_TCP, TCP_NODELAY,
929 (char *)nagle, &len);
933 ksocknal_connsock_decref(conn);
938 *txmem = *rxmem = *nagle = 0;
944 ksocknal_lib_setup_sock (struct socket *sock)
946 mm_segment_t oldmm = get_fs ();
953 struct linger linger;
955 sock->sk->sk_allocation = GFP_NOFS;
957 /* Ensure this socket aborts active sends immediately when we close
964 rc = sock_setsockopt (sock, SOL_SOCKET, SO_LINGER,
965 (char *)&linger, sizeof (linger));
968 CERROR ("Can't set SO_LINGER: %d\n", rc);
974 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_LINGER2,
975 (char *)&option, sizeof (option));
978 CERROR ("Can't set SO_LINGER2: %d\n", rc);
982 if (!*ksocknal_tunables.ksnd_nagle) {
986 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_NODELAY,
987 (char *)&option, sizeof (option));
990 CERROR ("Can't disable nagle: %d\n", rc);
995 rc = libcfs_sock_setbuf(sock,
996 *ksocknal_tunables.ksnd_tx_buffer_size,
997 *ksocknal_tunables.ksnd_rx_buffer_size);
999 CERROR ("Can't set buffer tx %d, rx %d buffers: %d\n",
1000 *ksocknal_tunables.ksnd_tx_buffer_size,
1001 *ksocknal_tunables.ksnd_rx_buffer_size, rc);
1005 /* TCP_BACKOFF_* sockopt tunables unsupported in stock kernels */
1006 #ifdef SOCKNAL_BACKOFF
1007 if (*ksocknal_tunables.ksnd_backoff_init > 0) {
1008 option = *ksocknal_tunables.ksnd_backoff_init;
1009 #ifdef SOCKNAL_BACKOFF_MS
1014 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_INIT,
1015 (char *)&option, sizeof (option));
1018 CERROR ("Can't set initial tcp backoff %d: %d\n",
1024 if (*ksocknal_tunables.ksnd_backoff_max > 0) {
1025 option = *ksocknal_tunables.ksnd_backoff_max;
1026 #ifdef SOCKNAL_BACKOFF_MS
1031 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_MAX,
1032 (char *)&option, sizeof (option));
1035 CERROR ("Can't set maximum tcp backoff %d: %d\n",
1042 /* snapshot tunables */
1043 keep_idle = *ksocknal_tunables.ksnd_keepalive_idle;
1044 keep_count = *ksocknal_tunables.ksnd_keepalive_count;
1045 keep_intvl = *ksocknal_tunables.ksnd_keepalive_intvl;
1047 do_keepalive = (keep_idle > 0 && keep_count > 0 && keep_intvl > 0);
1049 option = (do_keepalive ? 1 : 0);
1051 rc = sock_setsockopt (sock, SOL_SOCKET, SO_KEEPALIVE,
1052 (char *)&option, sizeof (option));
1055 CERROR ("Can't set SO_KEEPALIVE: %d\n", rc);
1063 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPIDLE,
1064 (char *)&keep_idle, sizeof (keep_idle));
1067 CERROR ("Can't set TCP_KEEPIDLE: %d\n", rc);
1072 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPINTVL,
1073 (char *)&keep_intvl, sizeof (keep_intvl));
1076 CERROR ("Can't set TCP_KEEPINTVL: %d\n", rc);
1081 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPCNT,
1082 (char *)&keep_count, sizeof (keep_count));
1085 CERROR ("Can't set TCP_KEEPCNT: %d\n", rc);
1092 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
1093 #define sock2tcp_opt(sk) tcp_sk(sk)
1095 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1097 struct tcp_sock *s = (struct tcp_sock *)sk;
1103 ksocknal_lib_push_conn (ksock_conn_t *conn)
1106 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11))
1109 struct tcp_sock *tp;
1116 rc = ksocknal_connsock_addref(conn);
1117 if (rc != 0) /* being shut down */
1120 sk = conn->ksnc_sock->sk;
1121 tp = sock2tcp_opt(sk);
1124 nonagle = tp->nonagle;
1131 rc = sk->sk_prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
1132 (char *)&val, sizeof (val));
1138 tp->nonagle = nonagle;
1141 ksocknal_connsock_decref(conn);
1144 extern void ksocknal_read_callback (ksock_conn_t *conn);
1145 extern void ksocknal_write_callback (ksock_conn_t *conn);
1147 * socket call back in Linux
1150 ksocknal_data_ready (struct sock *sk, int n)
1155 /* interleave correctly with closing sockets... */
1157 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1159 conn = sk->sk_user_data;
1160 if (conn == NULL) { /* raced with ksocknal_terminate_conn */
1161 LASSERT (sk->sk_data_ready != &ksocknal_data_ready);
1162 sk->sk_data_ready (sk, n);
1164 ksocknal_read_callback(conn);
1166 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1172 ksocknal_write_space (struct sock *sk)
1178 /* interleave correctly with closing sockets... */
1180 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1182 conn = sk->sk_user_data;
1183 wspace = SOCKNAL_WSPACE(sk);
1184 min_wpace = SOCKNAL_MIN_WSPACE(sk);
1186 CDEBUG(D_NET, "sk %p wspace %d low water %d conn %p%s%s%s\n",
1187 sk, wspace, min_wpace, conn,
1188 (conn == NULL) ? "" : (conn->ksnc_tx_ready ?
1189 " ready" : " blocked"),
1190 (conn == NULL) ? "" : (conn->ksnc_tx_scheduled ?
1191 " scheduled" : " idle"),
1192 (conn == NULL) ? "" : (cfs_list_empty (&conn->ksnc_tx_queue) ?
1193 " empty" : " queued"));
1195 if (conn == NULL) { /* raced with ksocknal_terminate_conn */
1196 LASSERT (sk->sk_write_space != &ksocknal_write_space);
1197 sk->sk_write_space (sk);
1199 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1203 if (wspace >= min_wpace) { /* got enough space */
1204 ksocknal_write_callback(conn);
1206 /* Clear SOCK_NOSPACE _after_ ksocknal_write_callback so the
1207 * ENOMEM check in ksocknal_transmit is race-free (think about
1210 clear_bit (SOCK_NOSPACE, &sk->sk_socket->flags);
1213 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1217 ksocknal_lib_save_callback(struct socket *sock, ksock_conn_t *conn)
1219 conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
1220 conn->ksnc_saved_write_space = sock->sk->sk_write_space;
1224 ksocknal_lib_set_callback(struct socket *sock, ksock_conn_t *conn)
1226 sock->sk->sk_user_data = conn;
1227 sock->sk->sk_data_ready = ksocknal_data_ready;
1228 sock->sk->sk_write_space = ksocknal_write_space;
1233 ksocknal_lib_reset_callback(struct socket *sock, ksock_conn_t *conn)
1235 /* Remove conn's network callbacks.
1236 * NB I _have_ to restore the callback, rather than storing a noop,
1237 * since the socket could survive past this module being unloaded!! */
1238 sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
1239 sock->sk->sk_write_space = conn->ksnc_saved_write_space;
1241 /* A callback could be in progress already; they hold a read lock
1242 * on ksnd_global_lock (to serialise with me) and NOOP if
1243 * sk_user_data is NULL. */
1244 sock->sk->sk_user_data = NULL;
1250 ksocknal_lib_memory_pressure(ksock_conn_t *conn)
1253 ksock_sched_t *sched;
1255 sched = conn->ksnc_scheduler;
1256 cfs_spin_lock_bh (&sched->kss_lock);
1258 if (!SOCK_TEST_NOSPACE(conn->ksnc_sock) &&
1259 !conn->ksnc_tx_ready) {
1260 /* SOCK_NOSPACE is set when the socket fills
1261 * and cleared in the write_space callback
1262 * (which also sets ksnc_tx_ready). If
1263 * SOCK_NOSPACE and ksnc_tx_ready are BOTH
1264 * zero, I didn't fill the socket and
1265 * write_space won't reschedule me, so I
1266 * return -ENOMEM to get my caller to retry
1267 * after a timeout */
1271 cfs_spin_unlock_bh (&sched->kss_lock);
1277 ksocknal_lib_bind_thread_to_cpu(int id)
1279 #if defined(CONFIG_SMP) && defined(CPU_AFFINITY)
1280 id = ksocknal_sched2cpu(id);
1281 if (cpu_online(id)) {
1282 cpumask_t m = CPU_MASK_NONE;
1284 set_cpus_allowed(current, m);