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test: add msg_zerocopy test
Introduce regression test for msg_zerocopy feature. Send traffic from one process to another with and without zerocopy. Evaluate tcp, udp, raw and packet sockets, including variants - udp: corking and corking with mixed copy/zerocopy calls - raw: with and without hdrincl - packet: at both raw and dgram level Test on both ipv4 and ipv6, optionally with ethtool changes to disable scatter-gather, tx checksum or tso offload. All of these can affect zerocopy behavior. The regression test can be run on a single machine if over a veth pair. Then skb_orphan_frags_rx must be modified to be identical to skb_orphan_frags to allow forwarding zerocopy locally. The msg_zerocopy.sh script will setup the veth pair in network namespaces and run all tests. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn
David S. Miller
parent
f214f915e7
commit
07b65c5b31
1
tools/testing/selftests/net/.gitignore
vendored
1
tools/testing/selftests/net/.gitignore
vendored
@ -1,3 +1,4 @@
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msg_zerocopy
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socket
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psock_fanout
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psock_tpacket
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@ -7,7 +7,7 @@ TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh
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TEST_GEN_FILES = socket
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TEST_GEN_FILES += psock_fanout psock_tpacket
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TEST_GEN_FILES += reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
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TEST_GEN_FILES += reuseport_dualstack
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TEST_GEN_FILES += reuseport_dualstack msg_zerocopy
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include ../lib.mk
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697
tools/testing/selftests/net/msg_zerocopy.c
Normal file
697
tools/testing/selftests/net/msg_zerocopy.c
Normal file
@ -0,0 +1,697 @@
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/* Evaluate MSG_ZEROCOPY
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*
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* Send traffic between two processes over one of the supported
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* protocols and modes:
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*
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* PF_INET/PF_INET6
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* - SOCK_STREAM
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* - SOCK_DGRAM
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* - SOCK_DGRAM with UDP_CORK
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* - SOCK_RAW
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* - SOCK_RAW with IP_HDRINCL
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*
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* PF_PACKET
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* - SOCK_DGRAM
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* - SOCK_RAW
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*
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* Start this program on two connected hosts, one in send mode and
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* the other with option '-r' to put it in receiver mode.
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*
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* If zerocopy mode ('-z') is enabled, the sender will verify that
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* the kernel queues completions on the error queue for all zerocopy
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* transfers.
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*/
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#define _GNU_SOURCE
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#include <arpa/inet.h>
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#include <error.h>
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#include <errno.h>
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#include <limits.h>
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#include <linux/errqueue.h>
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#include <linux/if_packet.h>
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#include <linux/ipv6.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/tcp.h>
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#include <netinet/udp.h>
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#include <poll.h>
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#include <sched.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#ifndef SO_EE_ORIGIN_ZEROCOPY
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#define SO_EE_ORIGIN_ZEROCOPY SO_EE_ORIGIN_UPAGE
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#endif
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#ifndef SO_ZEROCOPY
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#define SO_ZEROCOPY 59
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#endif
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#ifndef SO_EE_CODE_ZEROCOPY_COPIED
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#define SO_EE_CODE_ZEROCOPY_COPIED 1
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#endif
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#ifndef MSG_ZEROCOPY
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#define MSG_ZEROCOPY 0x4000000
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#endif
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static int cfg_cork;
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static bool cfg_cork_mixed;
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static int cfg_cpu = -1; /* default: pin to last cpu */
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static int cfg_family = PF_UNSPEC;
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static int cfg_ifindex = 1;
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static int cfg_payload_len;
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static int cfg_port = 8000;
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static bool cfg_rx;
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static int cfg_runtime_ms = 4200;
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static int cfg_verbose;
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static int cfg_waittime_ms = 500;
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static bool cfg_zerocopy;
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static socklen_t cfg_alen;
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static struct sockaddr_storage cfg_dst_addr;
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static struct sockaddr_storage cfg_src_addr;
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static char payload[IP_MAXPACKET];
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static long packets, bytes, completions, expected_completions;
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static int zerocopied = -1;
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static uint32_t next_completion;
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static unsigned long gettimeofday_ms(void)
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
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}
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static uint16_t get_ip_csum(const uint16_t *start, int num_words)
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{
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unsigned long sum = 0;
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int i;
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for (i = 0; i < num_words; i++)
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sum += start[i];
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while (sum >> 16)
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sum = (sum & 0xFFFF) + (sum >> 16);
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return ~sum;
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}
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static int do_setcpu(int cpu)
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{
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cpu_set_t mask;
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CPU_ZERO(&mask);
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CPU_SET(cpu, &mask);
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if (sched_setaffinity(0, sizeof(mask), &mask))
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error(1, 0, "setaffinity %d", cpu);
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if (cfg_verbose)
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fprintf(stderr, "cpu: %u\n", cpu);
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return 0;
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}
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static void do_setsockopt(int fd, int level, int optname, int val)
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{
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if (setsockopt(fd, level, optname, &val, sizeof(val)))
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error(1, errno, "setsockopt %d.%d: %d", level, optname, val);
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}
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static int do_poll(int fd, int events)
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{
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struct pollfd pfd;
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int ret;
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pfd.events = events;
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pfd.revents = 0;
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pfd.fd = fd;
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ret = poll(&pfd, 1, cfg_waittime_ms);
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if (ret == -1)
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error(1, errno, "poll");
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return ret && (pfd.revents & events);
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}
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static int do_accept(int fd)
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{
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int fda = fd;
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fd = accept(fda, NULL, NULL);
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if (fd == -1)
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error(1, errno, "accept");
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if (close(fda))
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error(1, errno, "close listen sock");
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return fd;
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}
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static bool do_sendmsg(int fd, struct msghdr *msg, bool do_zerocopy)
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{
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int ret, len, i, flags;
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len = 0;
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for (i = 0; i < msg->msg_iovlen; i++)
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len += msg->msg_iov[i].iov_len;
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flags = MSG_DONTWAIT;
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if (do_zerocopy)
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flags |= MSG_ZEROCOPY;
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ret = sendmsg(fd, msg, flags);
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if (ret == -1 && errno == EAGAIN)
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return false;
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if (ret == -1)
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error(1, errno, "send");
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if (cfg_verbose && ret != len)
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fprintf(stderr, "send: ret=%u != %u\n", ret, len);
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if (len) {
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packets++;
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bytes += ret;
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if (do_zerocopy && ret)
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expected_completions++;
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}
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return true;
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}
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static void do_sendmsg_corked(int fd, struct msghdr *msg)
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{
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bool do_zerocopy = cfg_zerocopy;
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int i, payload_len, extra_len;
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/* split up the packet. for non-multiple, make first buffer longer */
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payload_len = cfg_payload_len / cfg_cork;
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extra_len = cfg_payload_len - (cfg_cork * payload_len);
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do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 1);
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for (i = 0; i < cfg_cork; i++) {
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/* in mixed-frags mode, alternate zerocopy and copy frags
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* start with non-zerocopy, to ensure attach later works
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*/
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if (cfg_cork_mixed)
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do_zerocopy = (i & 1);
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msg->msg_iov[0].iov_len = payload_len + extra_len;
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extra_len = 0;
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do_sendmsg(fd, msg, do_zerocopy);
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}
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do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0);
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}
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static int setup_iph(struct iphdr *iph, uint16_t payload_len)
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{
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struct sockaddr_in *daddr = (void *) &cfg_dst_addr;
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struct sockaddr_in *saddr = (void *) &cfg_src_addr;
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memset(iph, 0, sizeof(*iph));
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iph->version = 4;
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iph->tos = 0;
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iph->ihl = 5;
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iph->ttl = 2;
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iph->saddr = saddr->sin_addr.s_addr;
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iph->daddr = daddr->sin_addr.s_addr;
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iph->protocol = IPPROTO_EGP;
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iph->tot_len = htons(sizeof(*iph) + payload_len);
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iph->check = get_ip_csum((void *) iph, iph->ihl << 1);
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return sizeof(*iph);
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}
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static int setup_ip6h(struct ipv6hdr *ip6h, uint16_t payload_len)
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{
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struct sockaddr_in6 *daddr = (void *) &cfg_dst_addr;
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struct sockaddr_in6 *saddr = (void *) &cfg_src_addr;
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memset(ip6h, 0, sizeof(*ip6h));
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ip6h->version = 6;
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ip6h->payload_len = htons(payload_len);
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ip6h->nexthdr = IPPROTO_EGP;
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ip6h->hop_limit = 2;
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ip6h->saddr = saddr->sin6_addr;
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ip6h->daddr = daddr->sin6_addr;
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return sizeof(*ip6h);
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}
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static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
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{
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struct sockaddr_in6 *addr6 = (void *) sockaddr;
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struct sockaddr_in *addr4 = (void *) sockaddr;
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switch (domain) {
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case PF_INET:
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addr4->sin_family = AF_INET;
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addr4->sin_port = htons(cfg_port);
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if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
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error(1, 0, "ipv4 parse error: %s", str_addr);
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break;
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case PF_INET6:
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addr6->sin6_family = AF_INET6;
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addr6->sin6_port = htons(cfg_port);
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if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
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error(1, 0, "ipv6 parse error: %s", str_addr);
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break;
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default:
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error(1, 0, "illegal domain");
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}
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}
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static int do_setup_tx(int domain, int type, int protocol)
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{
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int fd;
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fd = socket(domain, type, protocol);
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if (fd == -1)
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error(1, errno, "socket t");
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do_setsockopt(fd, SOL_SOCKET, SO_SNDBUF, 1 << 21);
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if (cfg_zerocopy)
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do_setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, 1);
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if (domain != PF_PACKET)
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if (connect(fd, (void *) &cfg_dst_addr, cfg_alen))
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error(1, errno, "connect");
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return fd;
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}
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static bool do_recv_completion(int fd)
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{
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struct sock_extended_err *serr;
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struct msghdr msg = {};
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struct cmsghdr *cm;
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uint32_t hi, lo, range;
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int ret, zerocopy;
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char control[100];
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msg.msg_control = control;
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msg.msg_controllen = sizeof(control);
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ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
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if (ret == -1 && errno == EAGAIN)
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return false;
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if (ret == -1)
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error(1, errno, "recvmsg notification");
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if (msg.msg_flags & MSG_CTRUNC)
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error(1, errno, "recvmsg notification: truncated");
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cm = CMSG_FIRSTHDR(&msg);
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if (!cm)
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error(1, 0, "cmsg: no cmsg");
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if (!((cm->cmsg_level == SOL_IP && cm->cmsg_type == IP_RECVERR) ||
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(cm->cmsg_level == SOL_IPV6 && cm->cmsg_type == IPV6_RECVERR) ||
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(cm->cmsg_level == SOL_PACKET && cm->cmsg_type == PACKET_TX_TIMESTAMP)))
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error(1, 0, "serr: wrong type: %d.%d",
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cm->cmsg_level, cm->cmsg_type);
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serr = (void *) CMSG_DATA(cm);
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if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY)
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error(1, 0, "serr: wrong origin: %u", serr->ee_origin);
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if (serr->ee_errno != 0)
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error(1, 0, "serr: wrong error code: %u", serr->ee_errno);
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hi = serr->ee_data;
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lo = serr->ee_info;
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range = hi - lo + 1;
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/* Detect notification gaps. These should not happen often, if at all.
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* Gaps can occur due to drops, reordering and retransmissions.
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*/
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if (lo != next_completion)
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fprintf(stderr, "gap: %u..%u does not append to %u\n",
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lo, hi, next_completion);
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next_completion = hi + 1;
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zerocopy = !(serr->ee_code & SO_EE_CODE_ZEROCOPY_COPIED);
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if (zerocopied == -1)
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zerocopied = zerocopy;
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else if (zerocopied != zerocopy) {
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fprintf(stderr, "serr: inconsistent\n");
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zerocopied = zerocopy;
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}
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if (cfg_verbose >= 2)
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fprintf(stderr, "completed: %u (h=%u l=%u)\n",
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range, hi, lo);
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completions += range;
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return true;
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}
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/* Read all outstanding messages on the errqueue */
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static void do_recv_completions(int fd)
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{
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while (do_recv_completion(fd)) {}
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}
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/* Wait for all remaining completions on the errqueue */
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static void do_recv_remaining_completions(int fd)
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{
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int64_t tstop = gettimeofday_ms() + cfg_waittime_ms;
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while (completions < expected_completions &&
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gettimeofday_ms() < tstop) {
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if (do_poll(fd, POLLERR))
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do_recv_completions(fd);
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}
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if (completions < expected_completions)
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error(1, 0, "missing notifications: %lu < %lu\n",
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completions, expected_completions);
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}
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static void do_tx(int domain, int type, int protocol)
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{
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struct iovec iov[3] = { {0} };
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struct sockaddr_ll laddr;
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struct msghdr msg = {0};
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struct ethhdr eth;
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union {
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struct ipv6hdr ip6h;
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struct iphdr iph;
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} nh;
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uint64_t tstop;
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int fd;
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fd = do_setup_tx(domain, type, protocol);
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if (domain == PF_PACKET) {
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uint16_t proto = cfg_family == PF_INET ? ETH_P_IP : ETH_P_IPV6;
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/* sock_raw passes ll header as data */
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if (type == SOCK_RAW) {
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memset(eth.h_dest, 0x06, ETH_ALEN);
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memset(eth.h_source, 0x02, ETH_ALEN);
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eth.h_proto = htons(proto);
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iov[0].iov_base = ð
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iov[0].iov_len = sizeof(eth);
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msg.msg_iovlen++;
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}
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/* both sock_raw and sock_dgram expect name */
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memset(&laddr, 0, sizeof(laddr));
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laddr.sll_family = AF_PACKET;
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laddr.sll_ifindex = cfg_ifindex;
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laddr.sll_protocol = htons(proto);
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laddr.sll_halen = ETH_ALEN;
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memset(laddr.sll_addr, 0x06, ETH_ALEN);
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msg.msg_name = &laddr;
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msg.msg_namelen = sizeof(laddr);
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}
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/* packet and raw sockets with hdrincl must pass network header */
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if (domain == PF_PACKET || protocol == IPPROTO_RAW) {
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if (cfg_family == PF_INET)
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iov[1].iov_len = setup_iph(&nh.iph, cfg_payload_len);
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else
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iov[1].iov_len = setup_ip6h(&nh.ip6h, cfg_payload_len);
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iov[1].iov_base = (void *) &nh;
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msg.msg_iovlen++;
|
||||
}
|
||||
|
||||
iov[2].iov_base = payload;
|
||||
iov[2].iov_len = cfg_payload_len;
|
||||
msg.msg_iovlen++;
|
||||
msg.msg_iov = &iov[3 - msg.msg_iovlen];
|
||||
|
||||
tstop = gettimeofday_ms() + cfg_runtime_ms;
|
||||
do {
|
||||
if (cfg_cork)
|
||||
do_sendmsg_corked(fd, &msg);
|
||||
else
|
||||
do_sendmsg(fd, &msg, cfg_zerocopy);
|
||||
|
||||
while (!do_poll(fd, POLLOUT)) {
|
||||
if (cfg_zerocopy)
|
||||
do_recv_completions(fd);
|
||||
}
|
||||
|
||||
} while (gettimeofday_ms() < tstop);
|
||||
|
||||
if (cfg_zerocopy)
|
||||
do_recv_remaining_completions(fd);
|
||||
|
||||
if (close(fd))
|
||||
error(1, errno, "close");
|
||||
|
||||
fprintf(stderr, "tx=%lu (%lu MB) txc=%lu zc=%c\n",
|
||||
packets, bytes >> 20, completions,
|
||||
zerocopied == 1 ? 'y' : 'n');
|
||||
}
|
||||
|
||||
static int do_setup_rx(int domain, int type, int protocol)
|
||||
{
|
||||
int fd;
|
||||
|
||||
/* If tx over PF_PACKET, rx over PF_INET(6)/SOCK_RAW,
|
||||
* to recv the only copy of the packet, not a clone
|
||||
*/
|
||||
if (domain == PF_PACKET)
|
||||
error(1, 0, "Use PF_INET/SOCK_RAW to read");
|
||||
|
||||
if (type == SOCK_RAW && protocol == IPPROTO_RAW)
|
||||
error(1, 0, "IPPROTO_RAW: not supported on Rx");
|
||||
|
||||
fd = socket(domain, type, protocol);
|
||||
if (fd == -1)
|
||||
error(1, errno, "socket r");
|
||||
|
||||
do_setsockopt(fd, SOL_SOCKET, SO_RCVBUF, 1 << 21);
|
||||
do_setsockopt(fd, SOL_SOCKET, SO_RCVLOWAT, 1 << 16);
|
||||
do_setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, 1);
|
||||
|
||||
if (bind(fd, (void *) &cfg_dst_addr, cfg_alen))
|
||||
error(1, errno, "bind");
|
||||
|
||||
if (type == SOCK_STREAM) {
|
||||
if (listen(fd, 1))
|
||||
error(1, errno, "listen");
|
||||
fd = do_accept(fd);
|
||||
}
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
/* Flush all outstanding bytes for the tcp receive queue */
|
||||
static void do_flush_tcp(int fd)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* MSG_TRUNC flushes up to len bytes */
|
||||
ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT);
|
||||
if (ret == -1 && errno == EAGAIN)
|
||||
return;
|
||||
if (ret == -1)
|
||||
error(1, errno, "flush");
|
||||
if (!ret)
|
||||
return;
|
||||
|
||||
packets++;
|
||||
bytes += ret;
|
||||
}
|
||||
|
||||
/* Flush all outstanding datagrams. Verify first few bytes of each. */
|
||||
static void do_flush_datagram(int fd, int type)
|
||||
{
|
||||
int ret, off = 0;
|
||||
char buf[64];
|
||||
|
||||
/* MSG_TRUNC will return full datagram length */
|
||||
ret = recv(fd, buf, sizeof(buf), MSG_DONTWAIT | MSG_TRUNC);
|
||||
if (ret == -1 && errno == EAGAIN)
|
||||
return;
|
||||
|
||||
/* raw ipv4 return with header, raw ipv6 without */
|
||||
if (cfg_family == PF_INET && type == SOCK_RAW) {
|
||||
off += sizeof(struct iphdr);
|
||||
ret -= sizeof(struct iphdr);
|
||||
}
|
||||
|
||||
if (ret == -1)
|
||||
error(1, errno, "recv");
|
||||
if (ret != cfg_payload_len)
|
||||
error(1, 0, "recv: ret=%u != %u", ret, cfg_payload_len);
|
||||
if (ret > sizeof(buf) - off)
|
||||
ret = sizeof(buf) - off;
|
||||
if (memcmp(buf + off, payload, ret))
|
||||
error(1, 0, "recv: data mismatch");
|
||||
|
||||
packets++;
|
||||
bytes += cfg_payload_len;
|
||||
}
|
||||
|
||||
static void do_rx(int domain, int type, int protocol)
|
||||
{
|
||||
uint64_t tstop;
|
||||
int fd;
|
||||
|
||||
fd = do_setup_rx(domain, type, protocol);
|
||||
|
||||
tstop = gettimeofday_ms() + cfg_runtime_ms;
|
||||
do {
|
||||
if (type == SOCK_STREAM)
|
||||
do_flush_tcp(fd);
|
||||
else
|
||||
do_flush_datagram(fd, type);
|
||||
|
||||
do_poll(fd, POLLIN);
|
||||
|
||||
} while (gettimeofday_ms() < tstop);
|
||||
|
||||
if (close(fd))
|
||||
error(1, errno, "close");
|
||||
|
||||
fprintf(stderr, "rx=%lu (%lu MB)\n", packets, bytes >> 20);
|
||||
}
|
||||
|
||||
static void do_test(int domain, int type, int protocol)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (cfg_cork && (domain == PF_PACKET || type != SOCK_DGRAM))
|
||||
error(1, 0, "can only cork udp sockets");
|
||||
|
||||
do_setcpu(cfg_cpu);
|
||||
|
||||
for (i = 0; i < IP_MAXPACKET; i++)
|
||||
payload[i] = 'a' + (i % 26);
|
||||
|
||||
if (cfg_rx)
|
||||
do_rx(domain, type, protocol);
|
||||
else
|
||||
do_tx(domain, type, protocol);
|
||||
}
|
||||
|
||||
static void usage(const char *filepath)
|
||||
{
|
||||
error(1, 0, "Usage: %s [options] <test>", filepath);
|
||||
}
|
||||
|
||||
static void parse_opts(int argc, char **argv)
|
||||
{
|
||||
const int max_payload_len = sizeof(payload) -
|
||||
sizeof(struct ipv6hdr) -
|
||||
sizeof(struct tcphdr) -
|
||||
40 /* max tcp options */;
|
||||
int c;
|
||||
|
||||
cfg_payload_len = max_payload_len;
|
||||
|
||||
while ((c = getopt(argc, argv, "46c:C:D:i:mp:rs:S:t:vz")) != -1) {
|
||||
switch (c) {
|
||||
case '4':
|
||||
if (cfg_family != PF_UNSPEC)
|
||||
error(1, 0, "Pass one of -4 or -6");
|
||||
cfg_family = PF_INET;
|
||||
cfg_alen = sizeof(struct sockaddr_in);
|
||||
break;
|
||||
case '6':
|
||||
if (cfg_family != PF_UNSPEC)
|
||||
error(1, 0, "Pass one of -4 or -6");
|
||||
cfg_family = PF_INET6;
|
||||
cfg_alen = sizeof(struct sockaddr_in6);
|
||||
break;
|
||||
case 'c':
|
||||
cfg_cork = strtol(optarg, NULL, 0);
|
||||
break;
|
||||
case 'C':
|
||||
cfg_cpu = strtol(optarg, NULL, 0);
|
||||
break;
|
||||
case 'D':
|
||||
setup_sockaddr(cfg_family, optarg, &cfg_dst_addr);
|
||||
break;
|
||||
case 'i':
|
||||
cfg_ifindex = if_nametoindex(optarg);
|
||||
if (cfg_ifindex == 0)
|
||||
error(1, errno, "invalid iface: %s", optarg);
|
||||
break;
|
||||
case 'm':
|
||||
cfg_cork_mixed = true;
|
||||
break;
|
||||
case 'p':
|
||||
cfg_port = htons(strtoul(optarg, NULL, 0));
|
||||
break;
|
||||
case 'r':
|
||||
cfg_rx = true;
|
||||
break;
|
||||
case 's':
|
||||
cfg_payload_len = strtoul(optarg, NULL, 0);
|
||||
break;
|
||||
case 'S':
|
||||
setup_sockaddr(cfg_family, optarg, &cfg_src_addr);
|
||||
break;
|
||||
case 't':
|
||||
cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000;
|
||||
break;
|
||||
case 'v':
|
||||
cfg_verbose++;
|
||||
break;
|
||||
case 'z':
|
||||
cfg_zerocopy = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (cfg_payload_len > max_payload_len)
|
||||
error(1, 0, "-s: payload exceeds max (%d)", max_payload_len);
|
||||
if (cfg_cork_mixed && (!cfg_zerocopy || !cfg_cork))
|
||||
error(1, 0, "-m: cork_mixed requires corking and zerocopy");
|
||||
|
||||
if (optind != argc - 1)
|
||||
usage(argv[0]);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
const char *cfg_test;
|
||||
|
||||
parse_opts(argc, argv);
|
||||
|
||||
cfg_test = argv[argc - 1];
|
||||
|
||||
if (!strcmp(cfg_test, "packet"))
|
||||
do_test(PF_PACKET, SOCK_RAW, 0);
|
||||
else if (!strcmp(cfg_test, "packet_dgram"))
|
||||
do_test(PF_PACKET, SOCK_DGRAM, 0);
|
||||
else if (!strcmp(cfg_test, "raw"))
|
||||
do_test(cfg_family, SOCK_RAW, IPPROTO_EGP);
|
||||
else if (!strcmp(cfg_test, "raw_hdrincl"))
|
||||
do_test(cfg_family, SOCK_RAW, IPPROTO_RAW);
|
||||
else if (!strcmp(cfg_test, "tcp"))
|
||||
do_test(cfg_family, SOCK_STREAM, 0);
|
||||
else if (!strcmp(cfg_test, "udp"))
|
||||
do_test(cfg_family, SOCK_DGRAM, 0);
|
||||
else
|
||||
error(1, 0, "unknown cfg_test %s", cfg_test);
|
||||
|
||||
return 0;
|
||||
}
|
||||
112
tools/testing/selftests/net/msg_zerocopy.sh
Executable file
112
tools/testing/selftests/net/msg_zerocopy.sh
Executable file
@ -0,0 +1,112 @@
|
||||
#!/bin/bash
|
||||
#
|
||||
# Send data between two processes across namespaces
|
||||
# Run twice: once without and once with zerocopy
|
||||
|
||||
set -e
|
||||
|
||||
readonly DEV="veth0"
|
||||
readonly DEV_MTU=65535
|
||||
readonly BIN="./msg_zerocopy"
|
||||
|
||||
readonly RAND="$(mktemp -u XXXXXX)"
|
||||
readonly NSPREFIX="ns-${RAND}"
|
||||
readonly NS1="${NSPREFIX}1"
|
||||
readonly NS2="${NSPREFIX}2"
|
||||
|
||||
readonly SADDR4='192.168.1.1'
|
||||
readonly DADDR4='192.168.1.2'
|
||||
readonly SADDR6='fd::1'
|
||||
readonly DADDR6='fd::2'
|
||||
|
||||
readonly path_sysctl_mem="net.core.optmem_max"
|
||||
|
||||
# Argument parsing
|
||||
if [[ "$#" -lt "2" ]]; then
|
||||
echo "Usage: $0 [4|6] [tcp|udp|raw|raw_hdrincl|packet|packet_dgram] <args>"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
readonly IP="$1"
|
||||
shift
|
||||
readonly TXMODE="$1"
|
||||
shift
|
||||
readonly EXTRA_ARGS="$@"
|
||||
|
||||
# Argument parsing: configure addresses
|
||||
if [[ "${IP}" == "4" ]]; then
|
||||
readonly SADDR="${SADDR4}"
|
||||
readonly DADDR="${DADDR4}"
|
||||
elif [[ "${IP}" == "6" ]]; then
|
||||
readonly SADDR="${SADDR6}"
|
||||
readonly DADDR="${DADDR6}"
|
||||
else
|
||||
echo "Invalid IP version ${IP}"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Argument parsing: select receive mode
|
||||
#
|
||||
# This differs from send mode for
|
||||
# - packet: use raw recv, because packet receives skb clones
|
||||
# - raw_hdrinc: use raw recv, because hdrincl is a tx-only option
|
||||
case "${TXMODE}" in
|
||||
'packet' | 'packet_dgram' | 'raw_hdrincl')
|
||||
RXMODE='raw'
|
||||
;;
|
||||
*)
|
||||
RXMODE="${TXMODE}"
|
||||
;;
|
||||
esac
|
||||
|
||||
# Start of state changes: install cleanup handler
|
||||
save_sysctl_mem="$(sysctl -n ${path_sysctl_mem})"
|
||||
|
||||
cleanup() {
|
||||
ip netns del "${NS2}"
|
||||
ip netns del "${NS1}"
|
||||
sysctl -w -q "${path_sysctl_mem}=${save_sysctl_mem}"
|
||||
}
|
||||
|
||||
trap cleanup EXIT
|
||||
|
||||
# Configure system settings
|
||||
sysctl -w -q "${path_sysctl_mem}=1000000"
|
||||
|
||||
# Create virtual ethernet pair between network namespaces
|
||||
ip netns add "${NS1}"
|
||||
ip netns add "${NS2}"
|
||||
|
||||
ip link add "${DEV}" mtu "${DEV_MTU}" netns "${NS1}" type veth \
|
||||
peer name "${DEV}" mtu "${DEV_MTU}" netns "${NS2}"
|
||||
|
||||
# Bring the devices up
|
||||
ip -netns "${NS1}" link set "${DEV}" up
|
||||
ip -netns "${NS2}" link set "${DEV}" up
|
||||
|
||||
# Set fixed MAC addresses on the devices
|
||||
ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02
|
||||
ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06
|
||||
|
||||
# Add fixed IP addresses to the devices
|
||||
ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}"
|
||||
ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}"
|
||||
ip -netns "${NS1}" addr add fd::1/64 dev "${DEV}" nodad
|
||||
ip -netns "${NS2}" addr add fd::2/64 dev "${DEV}" nodad
|
||||
|
||||
# Optionally disable sg or csum offload to test edge cases
|
||||
# ip netns exec "${NS1}" ethtool -K "${DEV}" sg off
|
||||
|
||||
do_test() {
|
||||
local readonly ARGS="$1"
|
||||
|
||||
echo "ipv${IP} ${TXMODE} ${ARGS}"
|
||||
ip netns exec "${NS2}" "${BIN}" "-${IP}" -i "${DEV}" -t 2 -C 2 -S "${SADDR}" -D "${DADDR}" ${ARGS} -r "${RXMODE}" &
|
||||
sleep 0.2
|
||||
ip netns exec "${NS1}" "${BIN}" "-${IP}" -i "${DEV}" -t 1 -C 3 -S "${SADDR}" -D "${DADDR}" ${ARGS} "${TXMODE}"
|
||||
wait
|
||||
}
|
||||
|
||||
do_test "${EXTRA_ARGS}"
|
||||
do_test "-z ${EXTRA_ARGS}"
|
||||
echo ok
|
||||
Loading…
Reference in New Issue
Block a user