net: Add socket() system call self test.

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 121 insertions, 0 deletions

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 3cc0ad7ae863..7c6280f1cf4d 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -5,6 +5,7 @@ TARGETS += vm
 TARGETS += cpu-hotplug
 TARGETS += memory-hotplug
 TARGETS += efivarfs
+TARGETS += net-socket
 
 all:
         for TARGET in $(TARGETS); do \
diff --git a/tools/testing/selftests/net-socket/Makefile b/tools/testing/selftests/net-socket/Makefile
new file mode 100644
index 000000000000..f27ee10da530
--- /dev/null
+++ b/tools/testing/selftests/net-socket/Makefile
@@ -0,0 +1,16 @@
+# Makefile for net-socket selftests
+
+CC = $(CROSS_COMPILE)gcc
+CFLAGS = -Wall
+
+NET_SOCK_PROGS = socket
+
+all: $(NET_SOCK_PROGS)
+%: %.c
+        $(CC) $(CFLAGS) -o $@ $^
+
+run_tests: all
+        @/bin/sh ./run_netsocktests || echo "vmtests: [FAIL]"
+
+clean:
+        $(RM) $(NET_SOCK_PROGS)
diff --git a/tools/testing/selftests/net-socket/run_netsocktests b/tools/testing/selftests/net-socket/run_netsocktests
new file mode 100644
index 000000000000..c09a682df56a
--- /dev/null
+++ b/tools/testing/selftests/net-socket/run_netsocktests
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+echo "--------------------"
+echo "running socket test"
+echo "--------------------"
+./socket
+if [ $? -ne 0 ]; then
+        echo "[FAIL]"
+else
+        echo "[PASS]"
+fi
+
diff --git a/tools/testing/selftests/net-socket/socket.c b/tools/testing/selftests/net-socket/socket.c
new file mode 100644
index 000000000000..0f227f2f9be9
--- /dev/null
+++ b/tools/testing/selftests/net-socket/socket.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+struct socket_testcase {
+        int     domain;
+        int     type;
+        int     protocol;
+
+        /* 0    = valid file descriptor
+         * -foo = error foo
+         */
+        int     expect;
+
+        /* If non-zero, accept EAFNOSUPPORT to handle the case
+         * of the protocol not being configured into the kernel.
+         */
+        int     nosupport_ok;
+};
+
+static struct socket_testcase tests[] = {
+        { AF_MAX,  0,           0,           -EAFNOSUPPORT,    0 },
+        { AF_INET, SOCK_STREAM, IPPROTO_TCP, 0,                1  },
+        { AF_INET, SOCK_DGRAM,  IPPROTO_TCP, -EPROTONOSUPPORT, 1  },
+        { AF_INET, SOCK_DGRAM,  IPPROTO_UDP, 0,                1  },
+        { AF_INET, SOCK_STREAM, IPPROTO_UDP, -EPROTONOSUPPORT, 1  },
+};
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#define ERR_STRING_SZ   64
+
+static int run_tests(void)
+{
+        char err_string1[ERR_STRING_SZ];
+        char err_string2[ERR_STRING_SZ];
+        int i, err;
+
+        err = 0;
+        for (i = 0; i < ARRAY_SIZE(tests); i++) {
+                struct socket_testcase *s = &tests[i];
+                int fd;
+
+                fd = socket(s->domain, s->type, s->protocol);
+                if (fd < 0) {
+                        if (s->nosupport_ok &&
+                            errno == EAFNOSUPPORT)
+                                continue;
+
+                        if (s->expect < 0 &&
+                            errno == -s->expect)
+                                continue;
+
+                        strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
+                        strerror_r(errno, err_string2, ERR_STRING_SZ);
+
+                        fprintf(stderr, "socket(%d, %d, %d) expected "
+                                "err (%s) got (%s)\n",
+                                s->domain, s->type, s->protocol,
+                                err_string1, err_string2);
+
+                        err = -1;
+                        break;
+                } else {
+                        close(fd);
+
+                        if (s->expect < 0) {
+                                strerror_r(errno, err_string1, ERR_STRING_SZ);
+
+                                fprintf(stderr, "socket(%d, %d, %d) expected "
+                                        "success got err (%s)\n",
+                                        s->domain, s->type, s->protocol,
+                                        err_string1);
+
+                                err = -1;
+                                break;
+                        }
+                }
+        }
+
+        return err;
+}
+
+int main(void)
+{
+        int err = run_tests();
+
+        return err;
+}