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
48 SOCKLND_RECONNECTS_MIN,
49 SOCKLND_RECONNECTS_MAX,
54 SOCKLND_RX_BUFFER_SIZE,
55 SOCKLND_TX_BUFFER_SIZE,
58 SOCKLND_KEEPALIVE_IDLE,
59 SOCKLND_KEEPALIVE_COUNT,
60 SOCKLND_KEEPALIVE_INTVL,
64 SOCKLND_ZERO_COPY_RECV,
65 SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS
69 #define SOCKLND_TIMEOUT CTL_UNNUMBERED
70 #define SOCKLND_CREDITS CTL_UNNUMBERED
71 #define SOCKLND_PEER_CREDITS CTL_UNNUMBERED
72 #define SOCKLND_NCONNDS CTL_UNNUMBERED
73 #define SOCKLND_RECONNECTS_MIN CTL_UNNUMBERED
74 #define SOCKLND_RECONNECTS_MAX CTL_UNNUMBERED
75 #define SOCKLND_EAGER_ACK CTL_UNNUMBERED
76 #define SOCKLND_ZERO_COPY CTL_UNNUMBERED
77 #define SOCKLND_TYPED CTL_UNNUMBERED
78 #define SOCKLND_BULK_MIN CTL_UNNUMBERED
79 #define SOCKLND_RX_BUFFER_SIZE CTL_UNNUMBERED
80 #define SOCKLND_TX_BUFFER_SIZE CTL_UNNUMBERED
81 #define SOCKLND_NAGLE CTL_UNNUMBERED
82 #define SOCKLND_IRQ_AFFINITY CTL_UNNUMBERED
83 #define SOCKLND_KEEPALIVE_IDLE CTL_UNNUMBERED
84 #define SOCKLND_KEEPALIVE_COUNT CTL_UNNUMBERED
85 #define SOCKLND_KEEPALIVE_INTVL CTL_UNNUMBERED
86 #define SOCKLND_BACKOFF_INIT CTL_UNNUMBERED
87 #define SOCKLND_BACKOFF_MAX CTL_UNNUMBERED
88 #define SOCKLND_PROTOCOL CTL_UNNUMBERED
89 #define SOCKLND_ZERO_COPY_RECV CTL_UNNUMBERED
90 #define SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS CTL_UNNUMBERED
93 static cfs_sysctl_table_t ksocknal_ctl_table[] = {
95 .ctl_name = SOCKLND_TIMEOUT,
96 .procname = "timeout",
97 .data = &ksocknal_tunables.ksnd_timeout,
98 .maxlen = sizeof (int),
100 .proc_handler = &proc_dointvec,
101 .strategy = &sysctl_intvec,
104 .ctl_name = SOCKLND_CREDITS,
105 .procname = "credits",
106 .data = &ksocknal_tunables.ksnd_credits,
107 .maxlen = sizeof (int),
109 .proc_handler = &proc_dointvec,
110 .strategy = &sysctl_intvec,
113 .ctl_name = SOCKLND_PEER_CREDITS,
114 .procname = "peer_credits",
115 .data = &ksocknal_tunables.ksnd_peercredits,
116 .maxlen = sizeof (int),
118 .proc_handler = &proc_dointvec,
119 .strategy = &sysctl_intvec,
122 .ctl_name = SOCKLND_NCONNDS,
123 .procname = "nconnds",
124 .data = &ksocknal_tunables.ksnd_nconnds,
125 .maxlen = sizeof (int),
127 .proc_handler = &proc_dointvec,
128 .strategy = &sysctl_intvec,
131 .ctl_name = SOCKLND_RECONNECTS_MIN,
132 .procname = "min_reconnectms",
133 .data = &ksocknal_tunables.ksnd_min_reconnectms,
134 .maxlen = sizeof (int),
136 .proc_handler = &proc_dointvec,
137 .strategy = &sysctl_intvec,
140 .ctl_name = SOCKLND_RECONNECTS_MAX,
141 .procname = "max_reconnectms",
142 .data = &ksocknal_tunables.ksnd_max_reconnectms,
143 .maxlen = sizeof (int),
145 .proc_handler = &proc_dointvec,
146 .strategy = &sysctl_intvec,
149 .ctl_name = SOCKLND_EAGER_ACK,
150 .procname = "eager_ack",
151 .data = &ksocknal_tunables.ksnd_eager_ack,
152 .maxlen = sizeof (int),
154 .proc_handler = &proc_dointvec,
155 .strategy = &sysctl_intvec,
158 .ctl_name = SOCKLND_ZERO_COPY,
159 .procname = "zero_copy",
160 .data = &ksocknal_tunables.ksnd_zc_min_frag,
161 .maxlen = sizeof (int),
163 .proc_handler = &proc_dointvec,
164 .strategy = &sysctl_intvec,
167 .ctl_name = SOCKLND_ZERO_COPY_RECV,
168 .procname = "zero_copy_recv",
169 .data = &ksocknal_tunables.ksnd_zc_recv,
170 .maxlen = sizeof (int),
172 .proc_handler = &proc_dointvec,
173 .strategy = &sysctl_intvec,
177 .ctl_name = SOCKLND_ZERO_COPY_RECV_MIN_NFRAGS,
178 .procname = "zero_copy_recv",
179 .data = &ksocknal_tunables.ksnd_zc_recv_min_nfrags,
180 .maxlen = sizeof (int),
182 .proc_handler = &proc_dointvec,
183 .strategy = &sysctl_intvec,
186 .ctl_name = SOCKLND_TYPED,
188 .data = &ksocknal_tunables.ksnd_typed_conns,
189 .maxlen = sizeof (int),
191 .proc_handler = &proc_dointvec,
192 .strategy = &sysctl_intvec,
195 .ctl_name = SOCKLND_BULK_MIN,
196 .procname = "min_bulk",
197 .data = &ksocknal_tunables.ksnd_min_bulk,
198 .maxlen = sizeof (int),
200 .proc_handler = &proc_dointvec,
201 .strategy = &sysctl_intvec,
204 .ctl_name = SOCKLND_RX_BUFFER_SIZE,
205 .procname = "rx_buffer_size",
206 .data = &ksocknal_tunables.ksnd_rx_buffer_size,
207 .maxlen = sizeof(int),
209 .proc_handler = &proc_dointvec,
210 .strategy = &sysctl_intvec,
213 .ctl_name = SOCKLND_TX_BUFFER_SIZE,
214 .procname = "tx_buffer_size",
215 .data = &ksocknal_tunables.ksnd_tx_buffer_size,
216 .maxlen = sizeof(int),
218 .proc_handler = &proc_dointvec,
219 .strategy = &sysctl_intvec,
222 .ctl_name = SOCKLND_NAGLE,
224 .data = &ksocknal_tunables.ksnd_nagle,
225 .maxlen = sizeof(int),
227 .proc_handler = &proc_dointvec,
228 .strategy = &sysctl_intvec,
232 .ctl_name = SOCKLND_IRQ_AFFINITY,
233 .procname = "irq_affinity",
234 .data = &ksocknal_tunables.ksnd_irq_affinity,
235 .maxlen = sizeof(int),
237 .proc_handler = &proc_dointvec,
238 .strategy = &sysctl_intvec,
242 .ctl_name = SOCKLND_KEEPALIVE_IDLE,
243 .procname = "keepalive_idle",
244 .data = &ksocknal_tunables.ksnd_keepalive_idle,
245 .maxlen = sizeof(int),
247 .proc_handler = &proc_dointvec,
248 .strategy = &sysctl_intvec,
251 .ctl_name = SOCKLND_KEEPALIVE_COUNT,
252 .procname = "keepalive_count",
253 .data = &ksocknal_tunables.ksnd_keepalive_count,
254 .maxlen = sizeof(int),
256 .proc_handler = &proc_dointvec,
257 .strategy = &sysctl_intvec,
260 .ctl_name = SOCKLND_KEEPALIVE_INTVL,
261 .procname = "keepalive_intvl",
262 .data = &ksocknal_tunables.ksnd_keepalive_intvl,
263 .maxlen = sizeof(int),
265 .proc_handler = &proc_dointvec,
266 .strategy = &sysctl_intvec,
268 #ifdef SOCKNAL_BACKOFF
270 .ctl_name = SOCKLND_BACKOFF_INIT,
271 .procname = "backoff_init",
272 .data = &ksocknal_tunables.ksnd_backoff_init,
273 .maxlen = sizeof(int),
275 .proc_handler = &proc_dointvec,
276 .strategy = &sysctl_intvec,
279 .ctl_name = SOCKLND_BACKOFF_MAX,
280 .procname = "backoff_max",
281 .data = &ksocknal_tunables.ksnd_backoff_max,
282 .maxlen = sizeof(int),
284 .proc_handler = &proc_dointvec,
285 .strategy = &sysctl_intvec,
288 #if SOCKNAL_VERSION_DEBUG
290 .ctl_name = SOCKLND_PROTOCOL,
291 .procname = "protocol",
292 .data = &ksocknal_tunables.ksnd_protocol,
293 .maxlen = sizeof(int),
295 .proc_handler = &proc_dointvec,
296 .strategy = &sysctl_intvec,
303 cfs_sysctl_table_t ksocknal_top_ctl_table[] = {
305 .ctl_name = CTL_SOCKLND,
306 .procname = "socknal",
310 .child = ksocknal_ctl_table
316 ksocknal_lib_tunables_init ()
318 if (*ksocknal_tunables.ksnd_zc_recv_min_nfrags < 2)
319 *ksocknal_tunables.ksnd_zc_recv_min_nfrags = 2;
320 if (*ksocknal_tunables.ksnd_zc_recv_min_nfrags > LNET_MAX_IOV)
321 *ksocknal_tunables.ksnd_zc_recv_min_nfrags = LNET_MAX_IOV;
323 ksocknal_tunables.ksnd_sysctl =
324 cfs_register_sysctl_table(ksocknal_top_ctl_table, 0);
326 if (ksocknal_tunables.ksnd_sysctl == NULL)
327 CWARN("Can't setup /proc tunables\n");
333 ksocknal_lib_tunables_fini ()
335 if (ksocknal_tunables.ksnd_sysctl != NULL)
336 cfs_unregister_sysctl_table(ksocknal_tunables.ksnd_sysctl);
340 ksocknal_lib_tunables_init ()
346 ksocknal_lib_tunables_fini ()
349 #endif /* # if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM */
352 ksocknal_lib_bind_irq (unsigned int irq)
354 #if (defined(CONFIG_SMP) && defined(CPU_AFFINITY))
358 ksock_irqinfo_t *info;
359 char *argv[] = {"/bin/sh",
363 char *envp[] = {"HOME=/",
364 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
367 LASSERT (irq < NR_IRQS);
368 if (irq == 0) /* software NIC or affinity disabled */
371 info = &ksocknal_data.ksnd_irqinfo[irq];
373 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
375 LASSERT (info->ksni_valid);
376 bind = !info->ksni_bound;
377 info->ksni_bound = 1;
379 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
381 if (!bind) /* bound already */
384 cpu = ksocknal_irqsched2cpu(info->ksni_sched);
385 snprintf (cmdline, sizeof (cmdline),
386 "echo %d > /proc/irq/%u/smp_affinity", 1 << cpu, irq);
388 LCONSOLE_INFO("Binding irq %u to CPU %d with cmd: %s\n",
391 /* FIXME: Find a better method of setting IRQ affinity...
394 USERMODEHELPER(argv[0], argv, envp);
399 ksocknal_lib_get_conn_addrs (ksock_conn_t *conn)
401 int rc = libcfs_sock_getaddr(conn->ksnc_sock, 1,
405 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
406 LASSERT (!conn->ksnc_closing);
409 CERROR ("Error %d getting sock peer IP\n", rc);
413 rc = libcfs_sock_getaddr(conn->ksnc_sock, 0,
414 &conn->ksnc_myipaddr, NULL);
416 CERROR ("Error %d getting sock local IP\n", rc);
424 ksocknal_lib_sock_irq (struct socket *sock)
428 struct dst_entry *dst;
430 if (!*ksocknal_tunables.ksnd_irq_affinity)
433 dst = sk_dst_get (sock->sk);
435 if (dst->dev != NULL) {
437 if (irq >= NR_IRQS) {
438 CERROR ("Unexpected IRQ %x\n", irq);
450 ksocknal_lib_zc_capable(struct socket *sock)
452 int caps = sock->sk->sk_route_caps;
454 /* ZC if the socket supports scatter/gather and doesn't need software
456 return ((caps & NETIF_F_SG) != 0 &&
457 (caps & (NETIF_F_IP_CSUM | NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)) != 0);
461 ksocknal_lib_send_iov (ksock_conn_t *conn, ksock_tx_t *tx)
463 struct socket *sock = conn->ksnc_sock;
467 if (*ksocknal_tunables.ksnd_enable_csum && /* checksum enabled */
468 conn->ksnc_proto == &ksocknal_protocol_v2x && /* V2.x connection */
469 tx->tx_nob == tx->tx_resid && /* frist sending */
470 tx->tx_msg.ksm_csum == 0) /* not checksummed */
471 ksocknal_lib_csum_tx(tx);
473 /* NB we can't trust socket ops to either consume our iovs
474 * or leave them alone. */
477 #if SOCKNAL_SINGLE_FRAG_TX
478 struct iovec scratch;
479 struct iovec *scratchiov = &scratch;
480 unsigned int niov = 1;
482 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
483 unsigned int niov = tx->tx_niov;
485 struct msghdr msg = {
488 .msg_iov = scratchiov,
492 .msg_flags = MSG_DONTWAIT
494 mm_segment_t oldmm = get_fs();
497 for (nob = i = 0; i < niov; i++) {
498 scratchiov[i] = tx->tx_iov[i];
499 nob += scratchiov[i].iov_len;
502 if (!list_empty(&conn->ksnc_tx_queue) ||
504 msg.msg_flags |= MSG_MORE;
507 rc = sock_sendmsg(sock, &msg, nob);
514 ksocknal_lib_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx)
516 struct socket *sock = conn->ksnc_sock;
517 lnet_kiov_t *kiov = tx->tx_kiov;
521 /* NB we can't trust socket ops to either consume our iovs
522 * or leave them alone. */
524 if (kiov->kiov_len >= *ksocknal_tunables.ksnd_zc_min_frag &&
525 tx->tx_msg.ksm_zc_req_cookie != 0) {
526 /* Zero copy is enabled */
527 struct sock *sk = sock->sk;
528 struct page *page = kiov->kiov_page;
529 int offset = kiov->kiov_offset;
530 int fragsize = kiov->kiov_len;
531 int msgflg = MSG_DONTWAIT;
533 CDEBUG(D_NET, "page %p + offset %x for %d\n",
534 page, offset, kiov->kiov_len);
536 if (!list_empty(&conn->ksnc_tx_queue) ||
537 fragsize < tx->tx_resid)
540 if (sk->sk_prot->sendpage != NULL) {
541 rc = sk->sk_prot->sendpage(sk, page,
542 offset, fragsize, msgflg);
544 rc = tcp_sendpage(sock, page, offset, fragsize, msgflg);
547 #if SOCKNAL_SINGLE_FRAG_TX || !SOCKNAL_RISK_KMAP_DEADLOCK
548 struct iovec scratch;
549 struct iovec *scratchiov = &scratch;
550 unsigned int niov = 1;
552 #ifdef CONFIG_HIGHMEM
553 #warning "XXX risk of kmap deadlock on multiple frags..."
555 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
556 unsigned int niov = tx->tx_nkiov;
558 struct msghdr msg = {
561 .msg_iov = scratchiov,
565 .msg_flags = MSG_DONTWAIT
567 mm_segment_t oldmm = get_fs();
570 for (nob = i = 0; i < niov; i++) {
571 scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
573 nob += scratchiov[i].iov_len = kiov[i].kiov_len;
576 if (!list_empty(&conn->ksnc_tx_queue) ||
578 msg.msg_flags |= MSG_MORE;
581 rc = sock_sendmsg(sock, &msg, nob);
584 for (i = 0; i < niov; i++)
585 kunmap(kiov[i].kiov_page);
591 ksocknal_lib_eager_ack (ksock_conn_t *conn)
594 mm_segment_t oldmm = get_fs();
595 struct socket *sock = conn->ksnc_sock;
597 /* Remind the socket to ACK eagerly. If I don't, the socket might
598 * think I'm about to send something it could piggy-back the ACK
599 * on, introducing delay in completing zero-copy sends in my
603 sock->ops->setsockopt (sock, SOL_TCP, TCP_QUICKACK,
604 (char *)&opt, sizeof (opt));
609 ksocknal_lib_recv_iov (ksock_conn_t *conn)
611 #if SOCKNAL_SINGLE_FRAG_RX
612 struct iovec scratch;
613 struct iovec *scratchiov = &scratch;
614 unsigned int niov = 1;
616 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
617 unsigned int niov = conn->ksnc_rx_niov;
619 struct iovec *iov = conn->ksnc_rx_iov;
620 struct msghdr msg = {
623 .msg_iov = scratchiov,
629 mm_segment_t oldmm = get_fs();
637 /* NB we can't trust socket ops to either consume our iovs
638 * or leave them alone. */
641 for (nob = i = 0; i < niov; i++) {
642 scratchiov[i] = iov[i];
643 nob += scratchiov[i].iov_len;
645 LASSERT (nob <= conn->ksnc_rx_nob_wanted);
648 rc = sock_recvmsg (conn->ksnc_sock, &msg, nob, MSG_DONTWAIT);
649 /* NB this is just a boolean..........................^ */
653 if (conn->ksnc_proto == &ksocknal_protocol_v2x) {
654 saved_csum = conn->ksnc_msg.ksm_csum;
655 conn->ksnc_msg.ksm_csum = 0;
658 if (saved_csum != 0) {
659 /* accumulate checksum */
660 for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
663 fragnob = iov[i].iov_len;
667 conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
668 iov[i].iov_base, fragnob);
670 conn->ksnc_msg.ksm_csum = saved_csum;
677 ksocknal_lib_kiov_vunmap(void *addr)
686 ksocknal_lib_kiov_vmap(lnet_kiov_t *kiov, int niov,
687 struct iovec *iov, struct page **pages)
693 if (!*ksocknal_tunables.ksnd_zc_recv || pages == NULL)
696 LASSERT (niov <= LNET_MAX_IOV);
699 niov < *ksocknal_tunables.ksnd_zc_recv_min_nfrags)
702 for (nob = i = 0; i < niov; i++) {
703 if ((kiov[i].kiov_offset != 0 && i > 0) ||
704 (kiov[i].kiov_offset + kiov[i].kiov_len != CFS_PAGE_SIZE && i < niov - 1))
707 pages[i] = kiov[i].kiov_page;
708 nob += kiov[i].kiov_len;
711 addr = vmap(pages, niov, VM_MAP, PAGE_KERNEL);
715 iov->iov_base = addr + kiov[0].kiov_offset;
722 ksocknal_lib_recv_kiov (ksock_conn_t *conn)
724 #if SOCKNAL_SINGLE_FRAG_RX || !SOCKNAL_RISK_KMAP_DEADLOCK
725 struct iovec scratch;
726 struct iovec *scratchiov = &scratch;
727 struct page **pages = NULL;
728 unsigned int niov = 1;
730 #ifdef CONFIG_HIGHMEM
731 #warning "XXX risk of kmap deadlock on multiple frags..."
733 struct iovec *scratchiov = conn->ksnc_scheduler->kss_scratch_iov;
734 struct page **pages = conn->ksnc_scheduler->kss_rx_scratch_pgs;
735 unsigned int niov = conn->ksnc_rx_nkiov;
737 lnet_kiov_t *kiov = conn->ksnc_rx_kiov;
738 struct msghdr msg = {
741 .msg_iov = scratchiov,
746 mm_segment_t oldmm = get_fs();
755 /* NB we can't trust socket ops to either consume our iovs
756 * or leave them alone. */
757 if ((addr = ksocknal_lib_kiov_vmap(kiov, niov, scratchiov, pages)) != NULL) {
758 nob = scratchiov[0].iov_len;
762 for (nob = i = 0; i < niov; i++) {
763 nob += scratchiov[i].iov_len = kiov[i].kiov_len;
764 scratchiov[i].iov_base = kmap(kiov[i].kiov_page) +
767 msg.msg_iovlen = niov;
770 LASSERT (nob <= conn->ksnc_rx_nob_wanted);
773 rc = sock_recvmsg (conn->ksnc_sock, &msg, nob, MSG_DONTWAIT);
774 /* NB this is just a boolean.......................^ */
777 if (conn->ksnc_msg.ksm_csum != 0) {
778 for (i = 0, sum = rc; sum > 0; i++, sum -= fragnob) {
781 /* Dang! have to kmap again because I have nowhere to stash the
782 * mapped address. But by doing it while the page is still
783 * mapped, the kernel just bumps the map count and returns me
784 * the address it stashed. */
785 base = kmap(kiov[i].kiov_page) + kiov[i].kiov_offset;
786 fragnob = kiov[i].kiov_len;
790 conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
793 kunmap(kiov[i].kiov_page);
798 ksocknal_lib_kiov_vunmap(addr);
800 for (i = 0; i < niov; i++)
801 kunmap(kiov[i].kiov_page);
808 ksocknal_lib_csum_tx(ksock_tx_t *tx)
814 LASSERT(tx->tx_iov[0].iov_base == (void *)&tx->tx_msg);
815 LASSERT(tx->tx_conn != NULL);
816 LASSERT(tx->tx_conn->ksnc_proto == &ksocknal_protocol_v2x);
818 tx->tx_msg.ksm_csum = 0;
820 csum = ksocknal_csum(~0, (void *)tx->tx_iov[0].iov_base,
821 tx->tx_iov[0].iov_len);
823 if (tx->tx_kiov != NULL) {
824 for (i = 0; i < tx->tx_nkiov; i++) {
825 base = kmap(tx->tx_kiov[i].kiov_page) +
826 tx->tx_kiov[i].kiov_offset;
828 csum = ksocknal_csum(csum, base, tx->tx_kiov[i].kiov_len);
830 kunmap(tx->tx_kiov[i].kiov_page);
833 for (i = 1; i < tx->tx_niov; i++)
834 csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
835 tx->tx_iov[i].iov_len);
838 if (*ksocknal_tunables.ksnd_inject_csum_error) {
840 *ksocknal_tunables.ksnd_inject_csum_error = 0;
843 tx->tx_msg.ksm_csum = csum;
847 ksocknal_lib_get_conn_tunables (ksock_conn_t *conn, int *txmem, int *rxmem, int *nagle)
849 mm_segment_t oldmm = get_fs ();
850 struct socket *sock = conn->ksnc_sock;
854 rc = ksocknal_connsock_addref(conn);
856 LASSERT (conn->ksnc_closing);
857 *txmem = *rxmem = *nagle = 0;
861 rc = libcfs_sock_getbuf(sock, txmem, rxmem);
863 len = sizeof(*nagle);
865 rc = sock->ops->getsockopt(sock, SOL_TCP, TCP_NODELAY,
866 (char *)nagle, &len);
870 ksocknal_connsock_decref(conn);
875 *txmem = *rxmem = *nagle = 0;
881 ksocknal_lib_setup_sock (struct socket *sock)
883 mm_segment_t oldmm = get_fs ();
890 struct linger linger;
892 sock->sk->sk_allocation = GFP_NOFS;
894 /* Ensure this socket aborts active sends immediately when we close
901 rc = sock_setsockopt (sock, SOL_SOCKET, SO_LINGER,
902 (char *)&linger, sizeof (linger));
905 CERROR ("Can't set SO_LINGER: %d\n", rc);
911 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_LINGER2,
912 (char *)&option, sizeof (option));
915 CERROR ("Can't set SO_LINGER2: %d\n", rc);
919 if (!*ksocknal_tunables.ksnd_nagle) {
923 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_NODELAY,
924 (char *)&option, sizeof (option));
927 CERROR ("Can't disable nagle: %d\n", rc);
932 rc = libcfs_sock_setbuf(sock,
933 *ksocknal_tunables.ksnd_tx_buffer_size,
934 *ksocknal_tunables.ksnd_rx_buffer_size);
936 CERROR ("Can't set buffer tx %d, rx %d buffers: %d\n",
937 *ksocknal_tunables.ksnd_tx_buffer_size,
938 *ksocknal_tunables.ksnd_rx_buffer_size, rc);
942 /* TCP_BACKOFF_* sockopt tunables unsupported in stock kernels */
943 #ifdef SOCKNAL_BACKOFF
944 if (*ksocknal_tunables.ksnd_backoff_init > 0) {
945 option = *ksocknal_tunables.ksnd_backoff_init;
946 #ifdef SOCKNAL_BACKOFF_MS
951 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_INIT,
952 (char *)&option, sizeof (option));
955 CERROR ("Can't set initial tcp backoff %d: %d\n",
961 if (*ksocknal_tunables.ksnd_backoff_max > 0) {
962 option = *ksocknal_tunables.ksnd_backoff_max;
963 #ifdef SOCKNAL_BACKOFF_MS
968 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_MAX,
969 (char *)&option, sizeof (option));
972 CERROR ("Can't set maximum tcp backoff %d: %d\n",
979 /* snapshot tunables */
980 keep_idle = *ksocknal_tunables.ksnd_keepalive_idle;
981 keep_count = *ksocknal_tunables.ksnd_keepalive_count;
982 keep_intvl = *ksocknal_tunables.ksnd_keepalive_intvl;
984 do_keepalive = (keep_idle > 0 && keep_count > 0 && keep_intvl > 0);
986 option = (do_keepalive ? 1 : 0);
988 rc = sock_setsockopt (sock, SOL_SOCKET, SO_KEEPALIVE,
989 (char *)&option, sizeof (option));
992 CERROR ("Can't set SO_KEEPALIVE: %d\n", rc);
1000 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPIDLE,
1001 (char *)&keep_idle, sizeof (keep_idle));
1004 CERROR ("Can't set TCP_KEEPIDLE: %d\n", rc);
1009 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPINTVL,
1010 (char *)&keep_intvl, sizeof (keep_intvl));
1013 CERROR ("Can't set TCP_KEEPINTVL: %d\n", rc);
1018 rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_KEEPCNT,
1019 (char *)&keep_count, sizeof (keep_count));
1022 CERROR ("Can't set TCP_KEEPCNT: %d\n", rc);
1029 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1030 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1032 return &(sk->tp_pinfo.af_tcp);
1034 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10))
1035 #define sock2tcp_opt(sk) tcp_sk(sk)
1037 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1039 struct tcp_sock *s = (struct tcp_sock *)sk;
1045 ksocknal_lib_push_conn (ksock_conn_t *conn)
1048 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11))
1051 struct tcp_sock *tp;
1058 rc = ksocknal_connsock_addref(conn);
1059 if (rc != 0) /* being shut down */
1062 sk = conn->ksnc_sock->sk;
1063 tp = sock2tcp_opt(sk);
1066 nonagle = tp->nonagle;
1073 rc = sk->sk_prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
1074 (char *)&val, sizeof (val));
1080 tp->nonagle = nonagle;
1083 ksocknal_connsock_decref(conn);
1086 extern void ksocknal_read_callback (ksock_conn_t *conn);
1087 extern void ksocknal_write_callback (ksock_conn_t *conn);
1089 * socket call back in Linux
1092 ksocknal_data_ready (struct sock *sk, int n)
1097 /* interleave correctly with closing sockets... */
1099 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1101 conn = sk->sk_user_data;
1102 if (conn == NULL) { /* raced with ksocknal_terminate_conn */
1103 LASSERT (sk->sk_data_ready != &ksocknal_data_ready);
1104 sk->sk_data_ready (sk, n);
1106 ksocknal_read_callback(conn);
1108 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1114 ksocknal_write_space (struct sock *sk)
1120 /* interleave correctly with closing sockets... */
1122 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1124 conn = sk->sk_user_data;
1125 wspace = SOCKNAL_WSPACE(sk);
1126 min_wpace = SOCKNAL_MIN_WSPACE(sk);
1128 CDEBUG(D_NET, "sk %p wspace %d low water %d conn %p%s%s%s\n",
1129 sk, wspace, min_wpace, conn,
1130 (conn == NULL) ? "" : (conn->ksnc_tx_ready ?
1131 " ready" : " blocked"),
1132 (conn == NULL) ? "" : (conn->ksnc_tx_scheduled ?
1133 " scheduled" : " idle"),
1134 (conn == NULL) ? "" : (list_empty (&conn->ksnc_tx_queue) ?
1135 " empty" : " queued"));
1137 if (conn == NULL) { /* raced with ksocknal_terminate_conn */
1138 LASSERT (sk->sk_write_space != &ksocknal_write_space);
1139 sk->sk_write_space (sk);
1141 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1145 if (wspace >= min_wpace) { /* got enough space */
1146 ksocknal_write_callback(conn);
1148 /* Clear SOCK_NOSPACE _after_ ksocknal_write_callback so the
1149 * ENOMEM check in ksocknal_transmit is race-free (think about
1152 clear_bit (SOCK_NOSPACE, &sk->sk_socket->flags);
1155 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1159 ksocknal_lib_save_callback(struct socket *sock, ksock_conn_t *conn)
1161 conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
1162 conn->ksnc_saved_write_space = sock->sk->sk_write_space;
1166 ksocknal_lib_set_callback(struct socket *sock, ksock_conn_t *conn)
1168 sock->sk->sk_user_data = conn;
1169 sock->sk->sk_data_ready = ksocknal_data_ready;
1170 sock->sk->sk_write_space = ksocknal_write_space;
1175 ksocknal_lib_reset_callback(struct socket *sock, ksock_conn_t *conn)
1177 /* Remove conn's network callbacks.
1178 * NB I _have_ to restore the callback, rather than storing a noop,
1179 * since the socket could survive past this module being unloaded!! */
1180 sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
1181 sock->sk->sk_write_space = conn->ksnc_saved_write_space;
1183 /* A callback could be in progress already; they hold a read lock
1184 * on ksnd_global_lock (to serialise with me) and NOOP if
1185 * sk_user_data is NULL. */
1186 sock->sk->sk_user_data = NULL;
1192 ksocknal_lib_memory_pressure(ksock_conn_t *conn)
1195 ksock_sched_t *sched;
1197 sched = conn->ksnc_scheduler;
1198 cfs_spin_lock_bh (&sched->kss_lock);
1200 if (!SOCK_TEST_NOSPACE(conn->ksnc_sock) &&
1201 !conn->ksnc_tx_ready) {
1202 /* SOCK_NOSPACE is set when the socket fills
1203 * and cleared in the write_space callback
1204 * (which also sets ksnc_tx_ready). If
1205 * SOCK_NOSPACE and ksnc_tx_ready are BOTH
1206 * zero, I didn't fill the socket and
1207 * write_space won't reschedule me, so I
1208 * return -ENOMEM to get my caller to retry
1209 * after a timeout */
1213 cfs_spin_unlock_bh (&sched->kss_lock);
1219 ksocknal_lib_new_incarnation(void)
1223 /* The incarnation number is the time this module loaded and it
1224 * identifies this particular instance of the socknal. Hopefully
1225 * we won't be able to reboot more frequently than 1MHz for the
1226 * forseeable future :) */
1228 do_gettimeofday(&tv);
1230 return (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1234 ksocknal_lib_bind_thread_to_cpu(int id)
1236 #if defined(CONFIG_SMP) && defined(CPU_AFFINITY)
1237 id = ksocknal_sched2cpu(id);
1238 if (cpu_online(id)) {
1239 cpumask_t m = CPU_MASK_NONE;
1241 set_cpus_allowed(current, m);