89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Carlos Neira cneirabustos@gmail.com */
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#define _GNU_SOURCE
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#include <test_progs.h>
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#include "test_ns_current_pid_tgid.skel.h"
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sched.h>
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#include <sys/wait.h>
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#include <sys/mount.h>
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#include <sys/fcntl.h>
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#define STACK_SIZE (1024 * 1024)
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static char child_stack[STACK_SIZE];
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static int test_current_pid_tgid(void *args)
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{
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struct test_ns_current_pid_tgid__bss *bss;
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struct test_ns_current_pid_tgid *skel;
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int err = -1, duration = 0;
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pid_t tgid, pid;
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struct stat st;
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skel = test_ns_current_pid_tgid__open_and_load();
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if (CHECK(!skel, "skel_open_load", "failed to load skeleton\n"))
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goto cleanup;
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pid = syscall(SYS_gettid);
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tgid = getpid();
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err = stat("/proc/self/ns/pid", &st);
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if (CHECK(err, "stat", "failed /proc/self/ns/pid: %d\n", err))
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goto cleanup;
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bss = skel->bss;
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bss->dev = st.st_dev;
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bss->ino = st.st_ino;
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bss->user_pid = 0;
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bss->user_tgid = 0;
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err = test_ns_current_pid_tgid__attach(skel);
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if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
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goto cleanup;
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/* trigger tracepoint */
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usleep(1);
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ASSERT_EQ(bss->user_pid, pid, "pid");
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ASSERT_EQ(bss->user_tgid, tgid, "tgid");
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err = 0;
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cleanup:
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test_ns_current_pid_tgid__destroy(skel);
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return err;
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}
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static void test_ns_current_pid_tgid_new_ns(void)
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{
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int wstatus, duration = 0;
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pid_t cpid;
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/* Create a process in a new namespace, this process
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* will be the init process of this new namespace hence will be pid 1.
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*/
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cpid = clone(test_current_pid_tgid, child_stack + STACK_SIZE,
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CLONE_NEWPID | SIGCHLD, NULL);
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if (CHECK(cpid == -1, "clone", "%s\n", strerror(errno)))
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return;
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if (CHECK(waitpid(cpid, &wstatus, 0) == -1, "waitpid", "%s\n", strerror(errno)))
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return;
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if (CHECK(WEXITSTATUS(wstatus) != 0, "newns_pidtgid", "failed"))
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return;
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}
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/* TODO: use a different tracepoint */
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void serial_test_ns_current_pid_tgid(void)
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{
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if (test__start_subtest("ns_current_pid_tgid_root_ns"))
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test_current_pid_tgid(NULL);
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if (test__start_subtest("ns_current_pid_tgid_new_ns"))
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test_ns_current_pid_tgid_new_ns();
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}
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