Hi!
> +#define _GNU_SOURCE
> +#include <sys/wait.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <errno.h>
> +#include "usctest.h"
> +#include "test.h"
> +#include "safe_macros.h"
> +#include "netns_helper.h"
> +
> +
> +/* by convention a named network namespace is an object
> + * at /var/run/netns/NAME that can be opened. (man 8 ip-netns) */
> +#define NETNS "/var/run/netns"
> +char *TCID = "netns_sendintf";
> +int TST_TOTAL = 3;
> +int pipefd[2];
> +
> +
> +static void cleanup(void)
> +{
> + close(pipefd[0]);
> + close(pipefd[1]);
This should be ported to the checkpoint interface.
> + /* removes veth0 device (which also removes paired veth1 device) */
> + if (WEXITSTATUS(system("ip link delete veth0")))
> + perror("system");
> + /* removes the network namespace myns */
> + if (WEXITSTATUS(system("ip netns del myns")))
> + perror("system");
> +}
> +
> +static void setup(void)
> +{
> + tst_require_root(NULL);
> + check_netns();
> +}
> +
> +int child_func(void)
> +{
> + int status, fd;
> + char c;
> +
> + fd = open(NETNS"/myns", O_RDONLY);
> + if (fd == -1) {
> + perror("open");
> + return 1;
> + }
> +
> + /* associates child with the namespace referred by fd (myns) */
> + if (setns(fd, 0) == -1) {
> + perror("setns");
> + return 1;
> + }
> +
> + /* setup for veth1 device */
> + if (WEXITSTATUS(system("ip address add 192.168.0.2/24 dev veth1"))) {
> + perror("system");
> + return 1;
> + }
> + if (WEXITSTATUS(system("ip link set dev veth1 up"))) {
> + perror("system");
> + return 1;
> + }
> +
> + /* waits for parent to confirm that veth0 device setup is done */
> + if (read(pipefd[0], &c, 1) == -1) {
> + perror("read");
> + return 1;
> + }
> +
> + /* ping veth0 address through veth1 device */
> + if (WEXITSTATUS(
> + system("ping -q -c 2 -I veth1 192.168.0.1 &>/dev/null")))
> + return 1;
> +
> + return 0;
> +}
> +
> +static void test(void)
> +{
> + pid_t pid;
> + int status, ret = 0;
> +
> + /* creates a pipe for synchronization between parent and child */
> + SAFE_PIPE(cleanup, pipefd);
> +
> + /* unshares a network and a mount namespace */
> + if (unshare(CLONE_NEWNET|CLONE_NEWNS) == -1)
> + tst_brkm(TBROK | TERRNO, cleanup, "unshare failed");
> +
> +
> + /* TEST CASE #1 */
> + /* creates a pair of virtual ethernet devices */
> + if (WEXITSTATUS(system("ip link add veth0 type veth peer name veth1")))
> + tst_brkm(TBROK | TERRNO, cleanup, "system failed");
> + /* creates a new network namespace "myns" (man 8 ip-netns) */
> + if (WEXITSTATUS(system("ip netns add myns")))
> + tst_brkm(TBROK | TERRNO, cleanup, "system failed");
> + /* adds device veth1 to myns namespace */
> + if (WEXITSTATUS(system("ip link set veth1 netns myns")))
> + tst_brkm(TBROK | TERRNO, cleanup, "system failed");
> +
> +
> + pid = fork();
> + if (pid < 0) { /* error */
> + tst_brkm(TBROK | TERRNO, cleanup, "fork failed");
> + }
> + if (pid == 0) { /* child */
> + _exit(child_func());
> + }
> +
> + /* parent */
And also freed from trivial comments like these.
--
Cyril Hrubis
[email protected]
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