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authorMike Maloney <maloney@google.com>2017-08-22 17:08:49 -0400
committerDavid S. Miller <davem@davemloft.net>2017-08-23 20:30:47 -0700
commit16e781224198be06389f6bd8a757c829bf221ea0 (patch)
tree528bfca0dfecd19eade87b02a1208b3e268f4e59 /tools/testing/selftests/networking
parenttcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg (diff)
downloadlinux-dev-16e781224198be06389f6bd8a757c829bf221ea0.tar.xz
linux-dev-16e781224198be06389f6bd8a757c829bf221ea0.zip
selftests/net: Add a test to validate behavior of rx timestamps
Validate the behavior of the combination of various timestamp socket options, and ensure consistency across ip, udp, and tcp. Signed-off-by: Mike Maloney <maloney@google.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/networking')
-rw-r--r--tools/testing/selftests/networking/timestamping/.gitignore1
-rw-r--r--tools/testing/selftests/networking/timestamping/Makefile4
-rw-r--r--tools/testing/selftests/networking/timestamping/rxtimestamp.c389
3 files changed, 393 insertions, 1 deletions
diff --git a/tools/testing/selftests/networking/timestamping/.gitignore b/tools/testing/selftests/networking/timestamping/.gitignore
index 9e69e982fb38..d9355035e746 100644
--- a/tools/testing/selftests/networking/timestamping/.gitignore
+++ b/tools/testing/selftests/networking/timestamping/.gitignore
@@ -1,3 +1,4 @@
timestamping
+rxtimestamp
txtimestamp
hwtstamp_config
diff --git a/tools/testing/selftests/networking/timestamping/Makefile b/tools/testing/selftests/networking/timestamping/Makefile
index ccbb9edbbbb9..92fb8ee917c5 100644
--- a/tools/testing/selftests/networking/timestamping/Makefile
+++ b/tools/testing/selftests/networking/timestamping/Makefile
@@ -1,4 +1,6 @@
-TEST_PROGS := hwtstamp_config timestamping txtimestamp
+CFLAGS += -I../../../../../usr/include
+
+TEST_PROGS := hwtstamp_config rxtimestamp timestamping txtimestamp
all: $(TEST_PROGS)
diff --git a/tools/testing/selftests/networking/timestamping/rxtimestamp.c b/tools/testing/selftests/networking/timestamping/rxtimestamp.c
new file mode 100644
index 000000000000..00f286661dcd
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/rxtimestamp.c
@@ -0,0 +1,389 @@
+#include <errno.h>
+#include <error.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+
+#include <asm/types.h>
+#include <linux/net_tstamp.h>
+#include <linux/errqueue.h>
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+struct options {
+ int so_timestamp;
+ int so_timestampns;
+ int so_timestamping;
+};
+
+struct tstamps {
+ bool tstamp;
+ bool tstampns;
+ bool swtstamp;
+ bool hwtstamp;
+};
+
+struct socket_type {
+ char *friendly_name;
+ int type;
+ int protocol;
+ bool enabled;
+};
+
+struct test_case {
+ struct options sockopt;
+ struct tstamps expected;
+ bool enabled;
+};
+
+struct sof_flag {
+ int mask;
+ char *name;
+};
+
+static struct sof_flag sof_flags[] = {
+#define SOF_FLAG(f) { f, #f }
+ SOF_FLAG(SOF_TIMESTAMPING_SOFTWARE),
+ SOF_FLAG(SOF_TIMESTAMPING_RX_SOFTWARE),
+ SOF_FLAG(SOF_TIMESTAMPING_RX_HARDWARE),
+};
+
+static struct socket_type socket_types[] = {
+ { "ip", SOCK_RAW, IPPROTO_EGP },
+ { "udp", SOCK_DGRAM, IPPROTO_UDP },
+ { "tcp", SOCK_STREAM, IPPROTO_TCP },
+};
+
+static struct test_case test_cases[] = {
+ { {}, {} },
+ {
+ { so_timestamp: 1 },
+ { tstamp: true }
+ },
+ {
+ { so_timestampns: 1 },
+ { tstampns: true }
+ },
+ {
+ { so_timestamp: 1, so_timestampns: 1 },
+ { tstampns: true }
+ },
+ {
+ { so_timestamping: SOF_TIMESTAMPING_RX_SOFTWARE },
+ {}
+ },
+ {
+ /* Loopback device does not support hw timestamps. */
+ { so_timestamping: SOF_TIMESTAMPING_RX_HARDWARE },
+ {}
+ },
+ {
+ { so_timestamping: SOF_TIMESTAMPING_SOFTWARE },
+ {}
+ },
+ {
+ { so_timestamping: SOF_TIMESTAMPING_RX_SOFTWARE
+ | SOF_TIMESTAMPING_RX_HARDWARE },
+ {}
+ },
+ {
+ { so_timestamping: SOF_TIMESTAMPING_SOFTWARE
+ | SOF_TIMESTAMPING_RX_SOFTWARE },
+ { swtstamp: true }
+ },
+ {
+ { so_timestamp: 1, so_timestamping: SOF_TIMESTAMPING_SOFTWARE
+ | SOF_TIMESTAMPING_RX_SOFTWARE },
+ { tstamp: true, swtstamp: true }
+ },
+};
+
+static struct option long_options[] = {
+ { "list_tests", no_argument, 0, 'l' },
+ { "test_num", required_argument, 0, 'n' },
+ { "op_size", required_argument, 0, 's' },
+ { "tcp", no_argument, 0, 't' },
+ { "udp", no_argument, 0, 'u' },
+ { "ip", no_argument, 0, 'i' },
+};
+
+static int next_port = 19999;
+static int op_size = 10 * 1024;
+
+void print_test_case(struct test_case *t)
+{
+ int f = 0;
+
+ printf("sockopts {");
+ if (t->sockopt.so_timestamp)
+ printf(" SO_TIMESTAMP ");
+ if (t->sockopt.so_timestampns)
+ printf(" SO_TIMESTAMPNS ");
+ if (t->sockopt.so_timestamping) {
+ printf(" SO_TIMESTAMPING: {");
+ for (f = 0; f < ARRAY_SIZE(sof_flags); f++)
+ if (t->sockopt.so_timestamping & sof_flags[f].mask)
+ printf(" %s |", sof_flags[f].name);
+ printf("}");
+ }
+ printf("} expected cmsgs: {");
+ if (t->expected.tstamp)
+ printf(" SCM_TIMESTAMP ");
+ if (t->expected.tstampns)
+ printf(" SCM_TIMESTAMPNS ");
+ if (t->expected.swtstamp || t->expected.hwtstamp) {
+ printf(" SCM_TIMESTAMPING {");
+ if (t->expected.swtstamp)
+ printf("0");
+ if (t->expected.swtstamp && t->expected.hwtstamp)
+ printf(",");
+ if (t->expected.hwtstamp)
+ printf("2");
+ printf("}");
+ }
+ printf("}\n");
+}
+
+void do_send(int src)
+{
+ int r;
+ char *buf = malloc(op_size);
+
+ memset(buf, 'z', op_size);
+ r = write(src, buf, op_size);
+ if (r < 0)
+ error(1, errno, "Failed to sendmsg");
+
+ free(buf);
+}
+
+bool do_recv(int rcv, int read_size, struct tstamps expected)
+{
+ const int CMSG_SIZE = 1024;
+
+ struct scm_timestamping *ts;
+ struct tstamps actual = {};
+ char cmsg_buf[CMSG_SIZE];
+ struct iovec recv_iov;
+ struct cmsghdr *cmsg;
+ bool failed = false;
+ struct msghdr hdr;
+ int flags = 0;
+ int r;
+
+ memset(&hdr, 0, sizeof(hdr));
+ hdr.msg_iov = &recv_iov;
+ hdr.msg_iovlen = 1;
+ recv_iov.iov_base = malloc(read_size);
+ recv_iov.iov_len = read_size;
+
+ hdr.msg_control = cmsg_buf;
+ hdr.msg_controllen = sizeof(cmsg_buf);
+
+ r = recvmsg(rcv, &hdr, flags);
+ if (r < 0)
+ error(1, errno, "Failed to recvmsg");
+ if (r != read_size)
+ error(1, 0, "Only received %d bytes of payload.", r);
+
+ if (hdr.msg_flags & (MSG_TRUNC | MSG_CTRUNC))
+ error(1, 0, "Message was truncated.");
+
+ for (cmsg = CMSG_FIRSTHDR(&hdr); cmsg != NULL;
+ cmsg = CMSG_NXTHDR(&hdr, cmsg)) {
+ if (cmsg->cmsg_level != SOL_SOCKET)
+ error(1, 0, "Unexpected cmsg_level %d",
+ cmsg->cmsg_level);
+ switch (cmsg->cmsg_type) {
+ case SCM_TIMESTAMP:
+ actual.tstamp = true;
+ break;
+ case SCM_TIMESTAMPNS:
+ actual.tstampns = true;
+ break;
+ case SCM_TIMESTAMPING:
+ ts = (struct scm_timestamping *)CMSG_DATA(cmsg);
+ actual.swtstamp = !!ts->ts[0].tv_sec;
+ if (ts->ts[1].tv_sec != 0)
+ error(0, 0, "ts[1] should not be set.");
+ actual.hwtstamp = !!ts->ts[2].tv_sec;
+ break;
+ default:
+ error(1, 0, "Unexpected cmsg_type %d", cmsg->cmsg_type);
+ }
+ }
+
+#define VALIDATE(field) \
+ do { \
+ if (expected.field != actual.field) { \
+ if (expected.field) \
+ error(0, 0, "Expected " #field " to be set."); \
+ else \
+ error(0, 0, \
+ "Expected " #field " to not be set."); \
+ failed = true; \
+ } \
+ } while (0)
+
+ VALIDATE(tstamp);
+ VALIDATE(tstampns);
+ VALIDATE(swtstamp);
+ VALIDATE(hwtstamp);
+#undef VALIDATE
+
+ free(recv_iov.iov_base);
+
+ return failed;
+}
+
+void config_so_flags(int rcv, struct options o)
+{
+ int on = 1;
+
+ if (setsockopt(rcv, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
+ error(1, errno, "Failed to enable SO_REUSEADDR");
+
+ if (o.so_timestamp &&
+ setsockopt(rcv, SOL_SOCKET, SO_TIMESTAMP,
+ &o.so_timestamp, sizeof(o.so_timestamp)) < 0)
+ error(1, errno, "Failed to enable SO_TIMESTAMP");
+
+ if (o.so_timestampns &&
+ setsockopt(rcv, SOL_SOCKET, SO_TIMESTAMPNS,
+ &o.so_timestampns, sizeof(o.so_timestampns)) < 0)
+ error(1, errno, "Failed to enable SO_TIMESTAMPNS");
+
+ if (o.so_timestamping &&
+ setsockopt(rcv, SOL_SOCKET, SO_TIMESTAMPING,
+ &o.so_timestamping, sizeof(o.so_timestamping)) < 0)
+ error(1, errno, "Failed to set SO_TIMESTAMPING");
+}
+
+bool run_test_case(struct socket_type s, struct test_case t)
+{
+ int port = (s.type == SOCK_RAW) ? 0 : next_port++;
+ int read_size = op_size;
+ struct sockaddr_in addr;
+ bool failed = false;
+ int src, dst, rcv;
+
+ src = socket(AF_INET, s.type, s.protocol);
+ if (src < 0)
+ error(1, errno, "Failed to open src socket");
+
+ dst = socket(AF_INET, s.type, s.protocol);
+ if (dst < 0)
+ error(1, errno, "Failed to open dst socket");
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ addr.sin_port = htons(port);
+
+ if (bind(dst, (struct sockaddr *)&addr, sizeof(addr)) < 0)
+ error(1, errno, "Failed to bind to port %d", port);
+
+ if (s.type == SOCK_STREAM && (listen(dst, 1) < 0))
+ error(1, errno, "Failed to listen");
+
+ if (connect(src, (struct sockaddr *)&addr, sizeof(addr)) < 0)
+ error(1, errno, "Failed to connect");
+
+ if (s.type == SOCK_STREAM) {
+ rcv = accept(dst, NULL, NULL);
+ if (rcv < 0)
+ error(1, errno, "Failed to accept");
+ close(dst);
+ } else {
+ rcv = dst;
+ }
+
+ config_so_flags(rcv, t.sockopt);
+ usleep(20000); /* setsockopt for SO_TIMESTAMPING is asynchronous */
+ do_send(src);
+
+ if (s.type == SOCK_RAW)
+ read_size += 20; /* for IP header */
+ failed = do_recv(rcv, read_size, t.expected);
+
+ close(rcv);
+ close(src);
+
+ return failed;
+}
+
+int main(int argc, char **argv)
+{
+ bool all_protocols = true;
+ bool all_tests = true;
+ int arg_index = 0;
+ int failures = 0;
+ int s, t;
+ char opt;
+
+ while ((opt = getopt_long(argc, argv, "", long_options,
+ &arg_index)) != -1) {
+ switch (opt) {
+ case 'l':
+ for (t = 0; t < ARRAY_SIZE(test_cases); t++) {
+ printf("%d\t", t);
+ print_test_case(&test_cases[t]);
+ }
+ return 0;
+ case 'n':
+ t = atoi(optarg);
+ if (t > ARRAY_SIZE(test_cases))
+ error(1, 0, "Invalid test case: %d", t);
+ all_tests = false;
+ test_cases[t].enabled = true;
+ break;
+ case 's':
+ op_size = atoi(optarg);
+ break;
+ case 't':
+ all_protocols = false;
+ socket_types[2].enabled = true;
+ break;
+ case 'u':
+ all_protocols = false;
+ socket_types[1].enabled = true;
+ break;
+ case 'i':
+ all_protocols = false;
+ socket_types[0].enabled = true;
+ break;
+ default:
+ error(1, 0, "Failed to parse parameters.");
+ }
+ }
+
+ for (s = 0; s < ARRAY_SIZE(socket_types); s++) {
+ if (!all_protocols && !socket_types[s].enabled)
+ continue;
+
+ printf("Testing %s...\n", socket_types[s].friendly_name);
+ for (t = 0; t < ARRAY_SIZE(test_cases); t++) {
+ if (!all_tests && !test_cases[t].enabled)
+ continue;
+
+ printf("Starting testcase %d...\n", t);
+ if (run_test_case(socket_types[s], test_cases[t])) {
+ failures++;
+ printf("FAILURE in test case ");
+ print_test_case(&test_cases[t]);
+ }
+ }
+ }
+ if (!failures)
+ printf("PASSED.\n");
+ return failures;
+}