1 // SPDX-License-Identifier: GPL-2.0
3 * Test functionality of BPF filters with SO_REUSEPORT. Same test as
4 * in reuseport_bpf_cpu, only as one socket per NUMA node.
12 #include <linux/filter.h>
13 #include <linux/bpf.h>
15 #include <linux/unistd.h>
20 #include <sys/epoll.h>
21 #include <sys/types.h>
22 #include <sys/socket.h>
26 static const int PORT = 8888;
28 static void build_rcv_group(int *rcv_fd, size_t len, int family, int proto)
30 struct sockaddr_storage addr;
31 struct sockaddr_in *addr4;
32 struct sockaddr_in6 *addr6;
38 addr4 = (struct sockaddr_in *)&addr;
39 addr4->sin_family = AF_INET;
40 addr4->sin_addr.s_addr = htonl(INADDR_ANY);
41 addr4->sin_port = htons(PORT);
44 addr6 = (struct sockaddr_in6 *)&addr;
45 addr6->sin6_family = AF_INET6;
46 addr6->sin6_addr = in6addr_any;
47 addr6->sin6_port = htons(PORT);
50 error(1, 0, "Unsupported family %d", family);
53 for (i = 0; i < len; ++i) {
54 rcv_fd[i] = socket(family, proto, 0);
56 error(1, errno, "failed to create receive socket");
59 if (setsockopt(rcv_fd[i], SOL_SOCKET, SO_REUSEPORT, &opt,
61 error(1, errno, "failed to set SO_REUSEPORT");
63 if (bind(rcv_fd[i], (struct sockaddr *)&addr, sizeof(addr)))
64 error(1, errno, "failed to bind receive socket");
66 if (proto == SOCK_STREAM && listen(rcv_fd[i], len * 10))
67 error(1, errno, "failed to listen on receive port");
71 static void attach_bpf(int fd)
73 static char bpf_log_buf[65536];
74 static const char bpf_license[] = "";
77 const struct bpf_insn prog[] = {
78 /* R0 = bpf_get_numa_node_id() */
79 { BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_numa_node_id },
81 { BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
85 memset(&attr, 0, sizeof(attr));
86 attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
87 attr.insn_cnt = sizeof(prog) / sizeof(prog[0]);
88 attr.insns = (unsigned long) &prog;
89 attr.license = (unsigned long) &bpf_license;
90 attr.log_buf = (unsigned long) &bpf_log_buf;
91 attr.log_size = sizeof(bpf_log_buf);
94 bpf_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
96 error(1, errno, "ebpf error. log:\n%s\n", bpf_log_buf);
98 if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &bpf_fd,
100 error(1, errno, "failed to set SO_ATTACH_REUSEPORT_EBPF");
105 static void send_from_node(int node_id, int family, int proto)
107 struct sockaddr_storage saddr, daddr;
108 struct sockaddr_in *saddr4, *daddr4;
109 struct sockaddr_in6 *saddr6, *daddr6;
114 saddr4 = (struct sockaddr_in *)&saddr;
115 saddr4->sin_family = AF_INET;
116 saddr4->sin_addr.s_addr = htonl(INADDR_ANY);
117 saddr4->sin_port = 0;
119 daddr4 = (struct sockaddr_in *)&daddr;
120 daddr4->sin_family = AF_INET;
121 daddr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
122 daddr4->sin_port = htons(PORT);
125 saddr6 = (struct sockaddr_in6 *)&saddr;
126 saddr6->sin6_family = AF_INET6;
127 saddr6->sin6_addr = in6addr_any;
128 saddr6->sin6_port = 0;
130 daddr6 = (struct sockaddr_in6 *)&daddr;
131 daddr6->sin6_family = AF_INET6;
132 daddr6->sin6_addr = in6addr_loopback;
133 daddr6->sin6_port = htons(PORT);
136 error(1, 0, "Unsupported family %d", family);
139 if (numa_run_on_node(node_id) < 0)
140 error(1, errno, "failed to pin to node");
142 fd = socket(family, proto, 0);
144 error(1, errno, "failed to create send socket");
146 if (bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)))
147 error(1, errno, "failed to bind send socket");
149 if (connect(fd, (struct sockaddr *)&daddr, sizeof(daddr)))
150 error(1, errno, "failed to connect send socket");
152 if (send(fd, "a", 1, 0) < 0)
153 error(1, errno, "failed to send message");
159 void receive_on_node(int *rcv_fd, int len, int epfd, int node_id, int proto)
161 struct epoll_event ev;
165 i = epoll_wait(epfd, &ev, 1, -1);
167 error(1, errno, "epoll_wait failed");
169 if (proto == SOCK_STREAM) {
170 fd = accept(ev.data.fd, NULL, NULL);
172 error(1, errno, "failed to accept");
173 i = recv(fd, buf, sizeof(buf), 0);
176 i = recv(ev.data.fd, buf, sizeof(buf), 0);
180 error(1, errno, "failed to recv");
182 for (i = 0; i < len; ++i)
183 if (ev.data.fd == rcv_fd[i])
186 error(1, 0, "failed to find socket");
187 fprintf(stderr, "send node %d, receive socket %d\n", node_id, i);
189 error(1, 0, "node id/receive socket mismatch");
192 static void test(int *rcv_fd, int len, int family, int proto)
194 struct epoll_event ev;
197 build_rcv_group(rcv_fd, len, family, proto);
198 attach_bpf(rcv_fd[0]);
200 epfd = epoll_create(1);
202 error(1, errno, "failed to create epoll");
203 for (node = 0; node < len; ++node) {
205 ev.data.fd = rcv_fd[node];
206 if (epoll_ctl(epfd, EPOLL_CTL_ADD, rcv_fd[node], &ev))
207 error(1, errno, "failed to register sock epoll");
210 /* Forward iterate */
211 for (node = 0; node < len; ++node) {
212 send_from_node(node, family, proto);
213 receive_on_node(rcv_fd, len, epfd, node, proto);
216 /* Reverse iterate */
217 for (node = len - 1; node >= 0; --node) {
218 send_from_node(node, family, proto);
219 receive_on_node(rcv_fd, len, epfd, node, proto);
223 for (node = 0; node < len; ++node)
231 if (numa_available() < 0)
232 error(1, errno, "no numa api support");
234 nodes = numa_max_node() + 1;
236 rcv_fd = calloc(nodes, sizeof(int));
238 error(1, 0, "failed to allocate array");
240 fprintf(stderr, "---- IPv4 UDP ----\n");
241 test(rcv_fd, nodes, AF_INET, SOCK_DGRAM);
243 fprintf(stderr, "---- IPv6 UDP ----\n");
244 test(rcv_fd, nodes, AF_INET6, SOCK_DGRAM);
246 fprintf(stderr, "---- IPv4 TCP ----\n");
247 test(rcv_fd, nodes, AF_INET, SOCK_STREAM);
249 fprintf(stderr, "---- IPv6 TCP ----\n");
250 test(rcv_fd, nodes, AF_INET6, SOCK_STREAM);
254 fprintf(stderr, "SUCCESS\n");