mirror of
https://github.com/checkpoint-restore/criu
synced 2025-08-22 09:58:09 +00:00
007501f985
This test simply creates a) root external mount and b) "deeper" bindmount for it (deeper in terms of mnt_depth). Our mount restore code tries to mount (b) first and fails (without previous patch ordering external mounts before their binds). Cherry-picked from Virtuozzo criu: https://src.openvz.org/projects/OVZ/repos/criu/commits/d31954669 Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
#include <sched.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <linux/limits.h>
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#include "zdtmtst.h"
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const char *test_doc = "Check root external mount with \"deepper\" bind";
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const char *test_author = "Pavel Tikhomirov <ptikhomirov@virtuozzo.com>";
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char *source = "zdtm_ext_root";
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char *dirname = "mnt_ext_root.test";
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TEST_OPTION(dirname, string, "directory name", 1);
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#define BUF_SIZE 4096
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int main(int argc, char **argv)
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{
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char *root, testdir[PATH_MAX];
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char dst[PATH_MAX], deep_bind[PATH_MAX];
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char *tmp = "/tmp/zdtm_ext_root.tmp";
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char *zdtm_newns = getenv("ZDTM_NEWNS");
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root = getenv("ZDTM_ROOT");
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if (root == NULL) {
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pr_perror("root");
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return 1;
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}
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if (!zdtm_newns) {
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pr_perror("ZDTM_NEWNS is not set");
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return 1;
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} else if (strcmp(zdtm_newns, "1")) {
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goto test;
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}
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/* Prepare directories in test root */
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sprintf(testdir, "%s/%s", root, dirname);
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mkdir(testdir, 0755);
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sprintf(dst, "%s/%s/dst", root, dirname);
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mkdir(dst, 0755);
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sprintf(deep_bind, "%s/%s/deep", root, dirname);
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mkdir(deep_bind, 0755);
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sprintf(deep_bind, "%s/%s/deep/bind", root, dirname);
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mkdir(deep_bind, 0755);
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/* Prepare mount in criu root */
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mkdir(tmp, 0755);
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if (mount(source, tmp, "tmpfs", 0, NULL)) {
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pr_perror("mount tmpfs");
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return 1;
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}
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if (mount(NULL, tmp, NULL, MS_PRIVATE, NULL)) {
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pr_perror("make private");
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return 1;
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}
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/*
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* Create temporary mntns, next mounts will not show up in criu mntns
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*/
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if (unshare(CLONE_NEWNS)) {
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pr_perror("unshare");
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return 1;
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}
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/*
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* Populate to the tests mntns root mounts
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*/
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if (mount(tmp, dst, NULL, MS_BIND, NULL)) {
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pr_perror("bind");
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return 1;
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}
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if (mount(tmp, deep_bind, NULL, MS_BIND, NULL)) {
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pr_perror("bind");
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return 1;
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}
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test:
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test_init(argc, argv);
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test_daemon();
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test_waitsig();
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pass();
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return 0;
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}
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