889 lines
18 KiB
C
889 lines
18 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#define _GNU_SOURCE
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#include <linux/limits.h>
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#include <linux/sched.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <stdio.h>
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#include <errno.h>
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#include <signal.h>
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#include <string.h>
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#include <pthread.h>
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#include "../kselftest.h"
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#include "cgroup_util.h"
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static int touch_anon(char *buf, size_t size)
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{
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int fd;
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char *pos = buf;
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fd = open("/dev/urandom", O_RDONLY);
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if (fd < 0)
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return -1;
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while (size > 0) {
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ssize_t ret = read(fd, pos, size);
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if (ret < 0) {
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if (errno != EINTR) {
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close(fd);
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return -1;
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}
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} else {
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pos += ret;
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size -= ret;
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}
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}
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close(fd);
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return 0;
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}
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static int alloc_and_touch_anon_noexit(const char *cgroup, void *arg)
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{
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int ppid = getppid();
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size_t size = (size_t)arg;
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void *buf;
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buf = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON,
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0, 0);
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if (buf == MAP_FAILED)
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return -1;
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if (touch_anon((char *)buf, size)) {
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munmap(buf, size);
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return -1;
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}
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while (getppid() == ppid)
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sleep(1);
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munmap(buf, size);
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return 0;
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}
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/*
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* Create a child process that allocates and touches 100MB, then waits to be
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* killed. Wait until the child is attached to the cgroup, kill all processes
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* in that cgroup and wait until "cgroup.procs" is empty. At this point try to
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* destroy the empty cgroup. The test helps detect race conditions between
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* dying processes leaving the cgroup and cgroup destruction path.
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*/
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static int test_cgcore_destroy(const char *root)
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{
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int ret = KSFT_FAIL;
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char *cg_test = NULL;
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int child_pid;
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char buf[PAGE_SIZE];
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cg_test = cg_name(root, "cg_test");
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if (!cg_test)
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goto cleanup;
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for (int i = 0; i < 10; i++) {
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if (cg_create(cg_test))
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goto cleanup;
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child_pid = cg_run_nowait(cg_test, alloc_and_touch_anon_noexit,
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(void *) MB(100));
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if (child_pid < 0)
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goto cleanup;
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/* wait for the child to enter cgroup */
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if (cg_wait_for_proc_count(cg_test, 1))
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goto cleanup;
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if (cg_killall(cg_test))
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goto cleanup;
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/* wait for cgroup to be empty */
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while (1) {
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if (cg_read(cg_test, "cgroup.procs", buf, sizeof(buf)))
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goto cleanup;
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if (buf[0] == '\0')
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break;
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usleep(1000);
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}
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if (rmdir(cg_test))
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goto cleanup;
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if (waitpid(child_pid, NULL, 0) < 0)
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goto cleanup;
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}
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ret = KSFT_PASS;
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cleanup:
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if (cg_test)
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cg_destroy(cg_test);
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free(cg_test);
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return ret;
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}
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/*
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* A(0) - B(0) - C(1)
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* \ D(0)
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*
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* A, B and C's "populated" fields would be 1 while D's 0.
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* test that after the one process in C is moved to root,
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* A,B and C's "populated" fields would flip to "0" and file
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* modified events will be generated on the
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* "cgroup.events" files of both cgroups.
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*/
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static int test_cgcore_populated(const char *root)
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{
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int ret = KSFT_FAIL;
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int err;
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char *cg_test_a = NULL, *cg_test_b = NULL;
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char *cg_test_c = NULL, *cg_test_d = NULL;
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int cgroup_fd = -EBADF;
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pid_t pid;
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cg_test_a = cg_name(root, "cg_test_a");
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cg_test_b = cg_name(root, "cg_test_a/cg_test_b");
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cg_test_c = cg_name(root, "cg_test_a/cg_test_b/cg_test_c");
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cg_test_d = cg_name(root, "cg_test_a/cg_test_b/cg_test_d");
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if (!cg_test_a || !cg_test_b || !cg_test_c || !cg_test_d)
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goto cleanup;
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if (cg_create(cg_test_a))
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goto cleanup;
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if (cg_create(cg_test_b))
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goto cleanup;
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if (cg_create(cg_test_c))
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goto cleanup;
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if (cg_create(cg_test_d))
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goto cleanup;
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if (cg_enter_current(cg_test_c))
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goto cleanup;
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if (cg_read_strcmp(cg_test_a, "cgroup.events", "populated 1\n"))
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goto cleanup;
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if (cg_read_strcmp(cg_test_b, "cgroup.events", "populated 1\n"))
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goto cleanup;
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if (cg_read_strcmp(cg_test_c, "cgroup.events", "populated 1\n"))
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goto cleanup;
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if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n"))
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goto cleanup;
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if (cg_enter_current(root))
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goto cleanup;
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if (cg_read_strcmp(cg_test_a, "cgroup.events", "populated 0\n"))
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goto cleanup;
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if (cg_read_strcmp(cg_test_b, "cgroup.events", "populated 0\n"))
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goto cleanup;
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if (cg_read_strcmp(cg_test_c, "cgroup.events", "populated 0\n"))
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goto cleanup;
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if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n"))
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goto cleanup;
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/* Test that we can directly clone into a new cgroup. */
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cgroup_fd = dirfd_open_opath(cg_test_d);
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if (cgroup_fd < 0)
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goto cleanup;
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pid = clone_into_cgroup(cgroup_fd);
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if (pid < 0) {
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if (errno == ENOSYS)
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goto cleanup_pass;
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goto cleanup;
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}
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if (pid == 0) {
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if (raise(SIGSTOP))
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exit(EXIT_FAILURE);
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exit(EXIT_SUCCESS);
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}
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err = cg_read_strcmp(cg_test_d, "cgroup.events", "populated 1\n");
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(void)clone_reap(pid, WSTOPPED);
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(void)kill(pid, SIGCONT);
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(void)clone_reap(pid, WEXITED);
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if (err)
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goto cleanup;
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if (cg_read_strcmp(cg_test_d, "cgroup.events", "populated 0\n"))
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goto cleanup;
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/* Remove cgroup. */
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if (cg_test_d) {
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cg_destroy(cg_test_d);
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free(cg_test_d);
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cg_test_d = NULL;
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}
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pid = clone_into_cgroup(cgroup_fd);
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if (pid < 0)
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goto cleanup_pass;
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if (pid == 0)
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exit(EXIT_SUCCESS);
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(void)clone_reap(pid, WEXITED);
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goto cleanup;
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cleanup_pass:
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ret = KSFT_PASS;
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cleanup:
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if (cg_test_d)
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cg_destroy(cg_test_d);
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if (cg_test_c)
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cg_destroy(cg_test_c);
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if (cg_test_b)
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cg_destroy(cg_test_b);
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if (cg_test_a)
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cg_destroy(cg_test_a);
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free(cg_test_d);
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free(cg_test_c);
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free(cg_test_b);
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free(cg_test_a);
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if (cgroup_fd >= 0)
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close(cgroup_fd);
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return ret;
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}
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/*
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* A (domain threaded) - B (threaded) - C (domain)
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*
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* test that C can't be used until it is turned into a
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* threaded cgroup. "cgroup.type" file will report "domain (invalid)" in
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* these cases. Operations which fail due to invalid topology use
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* EOPNOTSUPP as the errno.
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*/
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static int test_cgcore_invalid_domain(const char *root)
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{
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int ret = KSFT_FAIL;
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char *grandparent = NULL, *parent = NULL, *child = NULL;
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grandparent = cg_name(root, "cg_test_grandparent");
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parent = cg_name(root, "cg_test_grandparent/cg_test_parent");
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child = cg_name(root, "cg_test_grandparent/cg_test_parent/cg_test_child");
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if (!parent || !child || !grandparent)
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goto cleanup;
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if (cg_create(grandparent))
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goto cleanup;
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if (cg_create(parent))
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goto cleanup;
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if (cg_create(child))
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goto cleanup;
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if (cg_write(parent, "cgroup.type", "threaded"))
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goto cleanup;
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if (cg_read_strcmp(child, "cgroup.type", "domain invalid\n"))
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goto cleanup;
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if (!cg_enter_current(child))
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goto cleanup;
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if (errno != EOPNOTSUPP)
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goto cleanup;
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if (!clone_into_cgroup_run_wait(child))
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goto cleanup;
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if (errno == ENOSYS)
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goto cleanup_pass;
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if (errno != EOPNOTSUPP)
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goto cleanup;
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cleanup_pass:
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ret = KSFT_PASS;
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cleanup:
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cg_enter_current(root);
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if (child)
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cg_destroy(child);
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if (parent)
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cg_destroy(parent);
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if (grandparent)
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cg_destroy(grandparent);
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free(child);
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free(parent);
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free(grandparent);
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return ret;
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}
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/*
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* Test that when a child becomes threaded
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* the parent type becomes domain threaded.
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*/
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static int test_cgcore_parent_becomes_threaded(const char *root)
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{
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int ret = KSFT_FAIL;
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char *parent = NULL, *child = NULL;
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parent = cg_name(root, "cg_test_parent");
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child = cg_name(root, "cg_test_parent/cg_test_child");
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if (!parent || !child)
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goto cleanup;
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if (cg_create(parent))
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goto cleanup;
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if (cg_create(child))
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goto cleanup;
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if (cg_write(child, "cgroup.type", "threaded"))
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goto cleanup;
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if (cg_read_strcmp(parent, "cgroup.type", "domain threaded\n"))
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goto cleanup;
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ret = KSFT_PASS;
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cleanup:
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if (child)
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cg_destroy(child);
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if (parent)
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cg_destroy(parent);
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free(child);
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free(parent);
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return ret;
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}
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/*
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* Test that there's no internal process constrain on threaded cgroups.
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* You can add threads/processes on a parent with a controller enabled.
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*/
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static int test_cgcore_no_internal_process_constraint_on_threads(const char *root)
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{
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int ret = KSFT_FAIL;
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char *parent = NULL, *child = NULL;
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if (cg_read_strstr(root, "cgroup.controllers", "cpu") ||
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cg_write(root, "cgroup.subtree_control", "+cpu")) {
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ret = KSFT_SKIP;
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goto cleanup;
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}
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parent = cg_name(root, "cg_test_parent");
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child = cg_name(root, "cg_test_parent/cg_test_child");
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if (!parent || !child)
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goto cleanup;
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if (cg_create(parent))
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goto cleanup;
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if (cg_create(child))
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goto cleanup;
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if (cg_write(parent, "cgroup.type", "threaded"))
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goto cleanup;
|
||
|
|
|
||
|
|
if (cg_write(child, "cgroup.type", "threaded"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_write(parent, "cgroup.subtree_control", "+cpu"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_enter_current(parent))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
cg_enter_current(root);
|
||
|
|
cg_enter_current(root);
|
||
|
|
if (child)
|
||
|
|
cg_destroy(child);
|
||
|
|
if (parent)
|
||
|
|
cg_destroy(parent);
|
||
|
|
free(child);
|
||
|
|
free(parent);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Test that you can't enable a controller on a child if it's not enabled
|
||
|
|
* on the parent.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_top_down_constraint_enable(const char *root)
|
||
|
|
{
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
char *parent = NULL, *child = NULL;
|
||
|
|
|
||
|
|
parent = cg_name(root, "cg_test_parent");
|
||
|
|
child = cg_name(root, "cg_test_parent/cg_test_child");
|
||
|
|
if (!parent || !child)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(parent))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(child))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (!cg_write(child, "cgroup.subtree_control", "+memory"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
if (child)
|
||
|
|
cg_destroy(child);
|
||
|
|
if (parent)
|
||
|
|
cg_destroy(parent);
|
||
|
|
free(child);
|
||
|
|
free(parent);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Test that you can't disable a controller on a parent
|
||
|
|
* if it's enabled in a child.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_top_down_constraint_disable(const char *root)
|
||
|
|
{
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
char *parent = NULL, *child = NULL;
|
||
|
|
|
||
|
|
parent = cg_name(root, "cg_test_parent");
|
||
|
|
child = cg_name(root, "cg_test_parent/cg_test_child");
|
||
|
|
if (!parent || !child)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(parent))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(child))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_write(parent, "cgroup.subtree_control", "+memory"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_write(child, "cgroup.subtree_control", "+memory"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (!cg_write(parent, "cgroup.subtree_control", "-memory"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
if (child)
|
||
|
|
cg_destroy(child);
|
||
|
|
if (parent)
|
||
|
|
cg_destroy(parent);
|
||
|
|
free(child);
|
||
|
|
free(parent);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Test internal process constraint.
|
||
|
|
* You can't add a pid to a domain parent if a controller is enabled.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_internal_process_constraint(const char *root)
|
||
|
|
{
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
char *parent = NULL, *child = NULL;
|
||
|
|
|
||
|
|
parent = cg_name(root, "cg_test_parent");
|
||
|
|
child = cg_name(root, "cg_test_parent/cg_test_child");
|
||
|
|
if (!parent || !child)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(parent))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(child))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_write(parent, "cgroup.subtree_control", "+memory"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (!cg_enter_current(parent))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (!clone_into_cgroup_run_wait(parent))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
if (child)
|
||
|
|
cg_destroy(child);
|
||
|
|
if (parent)
|
||
|
|
cg_destroy(parent);
|
||
|
|
free(child);
|
||
|
|
free(parent);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *dummy_thread_fn(void *arg)
|
||
|
|
{
|
||
|
|
return (void *)(size_t)pause();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Test threadgroup migration.
|
||
|
|
* All threads of a process are migrated together.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_proc_migration(const char *root)
|
||
|
|
{
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
int t, c_threads = 0, n_threads = 13;
|
||
|
|
char *src = NULL, *dst = NULL;
|
||
|
|
pthread_t threads[n_threads];
|
||
|
|
|
||
|
|
src = cg_name(root, "cg_src");
|
||
|
|
dst = cg_name(root, "cg_dst");
|
||
|
|
if (!src || !dst)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(src))
|
||
|
|
goto cleanup;
|
||
|
|
if (cg_create(dst))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_enter_current(src))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
for (c_threads = 0; c_threads < n_threads; ++c_threads) {
|
||
|
|
if (pthread_create(&threads[c_threads], NULL, dummy_thread_fn, NULL))
|
||
|
|
goto cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
cg_enter_current(dst);
|
||
|
|
if (cg_read_lc(dst, "cgroup.threads") != n_threads + 1)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
for (t = 0; t < c_threads; ++t) {
|
||
|
|
pthread_cancel(threads[t]);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (t = 0; t < c_threads; ++t) {
|
||
|
|
pthread_join(threads[t], NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
cg_enter_current(root);
|
||
|
|
|
||
|
|
if (dst)
|
||
|
|
cg_destroy(dst);
|
||
|
|
if (src)
|
||
|
|
cg_destroy(src);
|
||
|
|
free(dst);
|
||
|
|
free(src);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *migrating_thread_fn(void *arg)
|
||
|
|
{
|
||
|
|
int g, i, n_iterations = 1000;
|
||
|
|
char **grps = arg;
|
||
|
|
char lines[3][PATH_MAX];
|
||
|
|
|
||
|
|
for (g = 1; g < 3; ++g)
|
||
|
|
snprintf(lines[g], sizeof(lines[g]), "0::%s", grps[g] + strlen(grps[0]));
|
||
|
|
|
||
|
|
for (i = 0; i < n_iterations; ++i) {
|
||
|
|
cg_enter_current_thread(grps[(i % 2) + 1]);
|
||
|
|
|
||
|
|
if (proc_read_strstr(0, 1, "cgroup", lines[(i % 2) + 1]))
|
||
|
|
return (void *)-1;
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Test single thread migration.
|
||
|
|
* Threaded cgroups allow successful migration of a thread.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_thread_migration(const char *root)
|
||
|
|
{
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
char *dom = NULL;
|
||
|
|
char line[PATH_MAX];
|
||
|
|
char *grps[3] = { (char *)root, NULL, NULL };
|
||
|
|
pthread_t thr;
|
||
|
|
void *retval;
|
||
|
|
|
||
|
|
dom = cg_name(root, "cg_dom");
|
||
|
|
grps[1] = cg_name(root, "cg_dom/cg_src");
|
||
|
|
grps[2] = cg_name(root, "cg_dom/cg_dst");
|
||
|
|
if (!grps[1] || !grps[2] || !dom)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(dom))
|
||
|
|
goto cleanup;
|
||
|
|
if (cg_create(grps[1]))
|
||
|
|
goto cleanup;
|
||
|
|
if (cg_create(grps[2]))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_write(grps[1], "cgroup.type", "threaded"))
|
||
|
|
goto cleanup;
|
||
|
|
if (cg_write(grps[2], "cgroup.type", "threaded"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_enter_current(grps[1]))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (pthread_create(&thr, NULL, migrating_thread_fn, grps))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (pthread_join(thr, &retval))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (retval)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
snprintf(line, sizeof(line), "0::%s", grps[1] + strlen(grps[0]));
|
||
|
|
if (proc_read_strstr(0, 1, "cgroup", line))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
cg_enter_current(root);
|
||
|
|
if (grps[2])
|
||
|
|
cg_destroy(grps[2]);
|
||
|
|
if (grps[1])
|
||
|
|
cg_destroy(grps[1]);
|
||
|
|
if (dom)
|
||
|
|
cg_destroy(dom);
|
||
|
|
free(grps[2]);
|
||
|
|
free(grps[1]);
|
||
|
|
free(dom);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* cgroup migration permission check should be performed based on the
|
||
|
|
* credentials at the time of open instead of write.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_lesser_euid_open(const char *root)
|
||
|
|
{
|
||
|
|
const uid_t test_euid = 65534; /* usually nobody, any !root is fine */
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
char *cg_test_a = NULL, *cg_test_b = NULL;
|
||
|
|
char *cg_test_a_procs = NULL, *cg_test_b_procs = NULL;
|
||
|
|
int cg_test_b_procs_fd = -1;
|
||
|
|
uid_t saved_uid;
|
||
|
|
|
||
|
|
cg_test_a = cg_name(root, "cg_test_a");
|
||
|
|
cg_test_b = cg_name(root, "cg_test_b");
|
||
|
|
|
||
|
|
if (!cg_test_a || !cg_test_b)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cg_test_a_procs = cg_name(cg_test_a, "cgroup.procs");
|
||
|
|
cg_test_b_procs = cg_name(cg_test_b, "cgroup.procs");
|
||
|
|
|
||
|
|
if (!cg_test_a_procs || !cg_test_b_procs)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(cg_test_a) || cg_create(cg_test_b))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_enter_current(cg_test_a))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (chown(cg_test_a_procs, test_euid, -1) ||
|
||
|
|
chown(cg_test_b_procs, test_euid, -1))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
saved_uid = geteuid();
|
||
|
|
if (seteuid(test_euid))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cg_test_b_procs_fd = open(cg_test_b_procs, O_RDWR);
|
||
|
|
|
||
|
|
if (seteuid(saved_uid))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_test_b_procs_fd < 0)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (write(cg_test_b_procs_fd, "0", 1) >= 0 || errno != EACCES)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
cg_enter_current(root);
|
||
|
|
if (cg_test_b_procs_fd >= 0)
|
||
|
|
close(cg_test_b_procs_fd);
|
||
|
|
if (cg_test_b)
|
||
|
|
cg_destroy(cg_test_b);
|
||
|
|
if (cg_test_a)
|
||
|
|
cg_destroy(cg_test_a);
|
||
|
|
free(cg_test_b_procs);
|
||
|
|
free(cg_test_a_procs);
|
||
|
|
free(cg_test_b);
|
||
|
|
free(cg_test_a);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct lesser_ns_open_thread_arg {
|
||
|
|
const char *path;
|
||
|
|
int fd;
|
||
|
|
int err;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int lesser_ns_open_thread_fn(void *arg)
|
||
|
|
{
|
||
|
|
struct lesser_ns_open_thread_arg *targ = arg;
|
||
|
|
|
||
|
|
targ->fd = open(targ->path, O_RDWR);
|
||
|
|
targ->err = errno;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* cgroup migration permission check should be performed based on the cgroup
|
||
|
|
* namespace at the time of open instead of write.
|
||
|
|
*/
|
||
|
|
static int test_cgcore_lesser_ns_open(const char *root)
|
||
|
|
{
|
||
|
|
static char stack[65536];
|
||
|
|
const uid_t test_euid = 65534; /* usually nobody, any !root is fine */
|
||
|
|
int ret = KSFT_FAIL;
|
||
|
|
char *cg_test_a = NULL, *cg_test_b = NULL;
|
||
|
|
char *cg_test_a_procs = NULL, *cg_test_b_procs = NULL;
|
||
|
|
int cg_test_b_procs_fd = -1;
|
||
|
|
struct lesser_ns_open_thread_arg targ = { .fd = -1 };
|
||
|
|
pid_t pid;
|
||
|
|
int status;
|
||
|
|
|
||
|
|
cg_test_a = cg_name(root, "cg_test_a");
|
||
|
|
cg_test_b = cg_name(root, "cg_test_b");
|
||
|
|
|
||
|
|
if (!cg_test_a || !cg_test_b)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cg_test_a_procs = cg_name(cg_test_a, "cgroup.procs");
|
||
|
|
cg_test_b_procs = cg_name(cg_test_b, "cgroup.procs");
|
||
|
|
|
||
|
|
if (!cg_test_a_procs || !cg_test_b_procs)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_create(cg_test_a) || cg_create(cg_test_b))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_enter_current(cg_test_b))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (chown(cg_test_a_procs, test_euid, -1) ||
|
||
|
|
chown(cg_test_b_procs, test_euid, -1))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
targ.path = cg_test_b_procs;
|
||
|
|
pid = clone(lesser_ns_open_thread_fn, stack + sizeof(stack),
|
||
|
|
CLONE_NEWCGROUP | CLONE_FILES | CLONE_VM | SIGCHLD,
|
||
|
|
&targ);
|
||
|
|
if (pid < 0)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (waitpid(pid, &status, 0) < 0)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (!WIFEXITED(status))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cg_test_b_procs_fd = targ.fd;
|
||
|
|
if (cg_test_b_procs_fd < 0)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if (cg_enter_current(cg_test_a))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
if ((status = write(cg_test_b_procs_fd, "0", 1)) >= 0 || errno != ENOENT)
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
ret = KSFT_PASS;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
cg_enter_current(root);
|
||
|
|
if (cg_test_b_procs_fd >= 0)
|
||
|
|
close(cg_test_b_procs_fd);
|
||
|
|
if (cg_test_b)
|
||
|
|
cg_destroy(cg_test_b);
|
||
|
|
if (cg_test_a)
|
||
|
|
cg_destroy(cg_test_a);
|
||
|
|
free(cg_test_b_procs);
|
||
|
|
free(cg_test_a_procs);
|
||
|
|
free(cg_test_b);
|
||
|
|
free(cg_test_a);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define T(x) { x, #x }
|
||
|
|
struct corecg_test {
|
||
|
|
int (*fn)(const char *root);
|
||
|
|
const char *name;
|
||
|
|
} tests[] = {
|
||
|
|
T(test_cgcore_internal_process_constraint),
|
||
|
|
T(test_cgcore_top_down_constraint_enable),
|
||
|
|
T(test_cgcore_top_down_constraint_disable),
|
||
|
|
T(test_cgcore_no_internal_process_constraint_on_threads),
|
||
|
|
T(test_cgcore_parent_becomes_threaded),
|
||
|
|
T(test_cgcore_invalid_domain),
|
||
|
|
T(test_cgcore_populated),
|
||
|
|
T(test_cgcore_proc_migration),
|
||
|
|
T(test_cgcore_thread_migration),
|
||
|
|
T(test_cgcore_destroy),
|
||
|
|
T(test_cgcore_lesser_euid_open),
|
||
|
|
T(test_cgcore_lesser_ns_open),
|
||
|
|
};
|
||
|
|
#undef T
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
char root[PATH_MAX];
|
||
|
|
int i, ret = EXIT_SUCCESS;
|
||
|
|
|
||
|
|
if (cg_find_unified_root(root, sizeof(root)))
|
||
|
|
ksft_exit_skip("cgroup v2 isn't mounted\n");
|
||
|
|
|
||
|
|
if (cg_read_strstr(root, "cgroup.subtree_control", "memory"))
|
||
|
|
if (cg_write(root, "cgroup.subtree_control", "+memory"))
|
||
|
|
ksft_exit_skip("Failed to set memory controller\n");
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(tests); i++) {
|
||
|
|
switch (tests[i].fn(root)) {
|
||
|
|
case KSFT_PASS:
|
||
|
|
ksft_test_result_pass("%s\n", tests[i].name);
|
||
|
|
break;
|
||
|
|
case KSFT_SKIP:
|
||
|
|
ksft_test_result_skip("%s\n", tests[i].name);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = EXIT_FAILURE;
|
||
|
|
ksft_test_result_fail("%s\n", tests[i].name);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|