2 * Copyright (c) 2016 Adrian Chadd <adrian@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <sys/cpuset.h>
34 #include <sys/sysctl.h>
45 #include <netinet/in.h>
50 rss_sock_set_bindmulti(int fd, int af, int val)
59 retval = setsockopt(fd,
60 af == AF_INET ? IPPROTO_IP : IPPROTO_IPV6,
61 af == AF_INET ? IP_BINDMULTI : IPV6_BINDMULTI,
65 warn("%s: setsockopt(IP_BINDMULTI)", __func__);
72 rss_sock_set_rss_bucket(int fd, int af, int rss_bucket)
82 f = IP_RSS_LISTEN_BUCKET;
86 f = IPV6_RSS_LISTEN_BUCKET;
95 retval = setsockopt(fd, p, f, &opt, optlen);
97 warn("%s: setsockopt(IP_RSS_LISTEN_BUCKET)", __func__);
104 rss_sock_set_recvrss(int fd, int af, int val)
114 f2 = IP_RECVRSSBUCKETID;
118 f1 = IPV6_RECVFLOWID;
119 f2 = IPV6_RECVRSSBUCKETID;
125 /* Enable/disable flowid */
127 optlen = sizeof(opt);
128 retval = setsockopt(fd, p, f1, &opt, optlen);
130 warn("%s: setsockopt(IP_RECVFLOWID)", __func__);
134 /* Enable/disable RSS bucket reception */
136 optlen = sizeof(opt);
137 retval = setsockopt(fd, p, f2, &opt, optlen);
139 warn("%s: setsockopt(IP_RECVRSSBUCKETID)", __func__);
147 rss_getsysctlint(const char *s)
153 retval = sysctlbyname(s, &val, &rlen, NULL, 0);
155 warn("sysctlbyname (%s)", s);
163 rss_getbucketmap(int *bucket_map, int nbuckets)
165 /* XXX I'm lazy; so static string it is */
173 memset(bstr, '\0', sizeof(bstr));
175 rlen = sizeof(bstr) - 1;
176 retval = sysctlbyname("net.inet.rss.bucket_mapping", bstr, &rlen, NULL, 0);
178 warn("sysctlbyname (net.inet.rss.bucket_mapping)");
183 while ((s = strsep(&ss, " ")) != NULL) {
184 r = sscanf(s, "%d:%d", &b, &c);
186 fprintf(stderr, "%s: string (%s) not parsable\n",
192 fprintf(stderr, "%s: bucket %d > nbuckets %d\n",
198 /* XXX no maxcpu check */
207 struct rss_config *rc = NULL;
209 rc = calloc(1, sizeof(*rc));
211 warn("%s: calloc", __func__);
215 rc->rss_ncpus = rss_getsysctlint("net.inet.rss.ncpus");
216 if (rc->rss_ncpus < 0) {
217 fprintf(stderr, "%s: couldn't fetch net.inet.rss.ncpus\n", __func__);
221 rc->rss_nbuckets = rss_getsysctlint("net.inet.rss.buckets");
222 if (rc->rss_nbuckets < 0) {
223 fprintf(stderr, "%s: couldn't fetch net.inet.rss.nbuckets\n", __func__);
227 rc->rss_basecpu = rss_getsysctlint("net.inet.rss.basecpu");
228 if (rc->rss_basecpu< 0) {
229 fprintf(stderr, "%s: couldn't fetch net.inet.rss.basecpu\n", __func__);
233 rc->rss_bucket_map = calloc(rc->rss_nbuckets, sizeof(int));
234 if (rc->rss_bucket_map == NULL) {
235 warn("%s: calloc (rss buckets; %d entries)", __func__, rc->rss_nbuckets);
239 if (rss_getbucketmap(rc->rss_bucket_map, rc->rss_nbuckets) != 0) {
240 fprintf(stderr, "%s: rss_getbucketmap failed\n", __func__);
248 free(rc->rss_bucket_map);
255 rss_config_free(struct rss_config *rc)
258 if ((rc != NULL) && rc->rss_bucket_map)
259 free(rc->rss_bucket_map);
265 rss_config_get_bucket_count(struct rss_config *rc)
270 return (rc->rss_nbuckets);
274 rss_get_bucket_cpuset(struct rss_config *rc, rss_bucket_type_t btype,
275 int bucket, cpuset_t *cs)
278 if (bucket < 0 || bucket >= rc->rss_nbuckets) {
284 * For now all buckets are the same, but eventually we'll want
285 * to allow administrators to set separate RSS cpusets for
286 * {kernel,user} {tx, rx} combinations.
288 if (btype <= RSS_BUCKET_TYPE_NONE || btype > RSS_BUCKET_TYPE_MAX) {
294 CPU_SET(rc->rss_bucket_map[bucket], cs);
300 rss_set_bucket_rebalance_cb(rss_bucket_rebalance_cb_t *cb, void *cbdata)
307 * For now there's no rebalance callback, so
308 * just return 0 and ignore it.