Ejemplo n.º 1
0
static int hyper_container_init(void *data)
{
	struct hyper_container_arg *arg = data;
	struct hyper_container *container = arg->c;
	char root[512], oldroot[512];

	fprintf(stdout, "%s in\n", __func__);
	if (container->exec.argv == NULL) {
		fprintf(stdout, "no cmd!\n");
		goto fail;
	}

	if (setns(arg->ipcns, CLONE_NEWIPC) < 0) {
		perror("setns to ipcns of pod init faild");
		goto fail;
	}

	if (setns(arg->utsns, CLONE_NEWUTS) < 0) {
		perror("setns to ipcns of pod init faild");
		goto fail;
	}

	if (hyper_rescan_scsi() < 0) {
		fprintf(stdout, "rescan scsi failed\n");
		goto fail;
	}

	if (hyper_setup_env(container->envs, container->envs_num) < 0) {
		fprintf(stdout, "setup env failed\n");
		goto fail;
	}

	if (mount("", "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
		perror("mount SLAVE failed");
		goto fail;
	}

	if (mount("", "/", NULL, MS_PRIVATE|MS_REC, NULL) < 0) {
		perror("mount PRIVATE failed");
		goto fail;
	}

	sprintf(root, "/tmp/hyper/%s/root/", container->id);
	if (hyper_mkdir(root) < 0) {
		perror("make root directroy failed");
		goto fail;
	}

	fprintf(stdout, "container root directory %s\n", root);

	if (container->fstype) {
		char dev[128];

		sprintf(dev, "/dev/%s", container->image);
		fprintf(stdout, "device %s\n", dev);

		if (mount(dev, root, container->fstype, 0, NULL) < 0) {
			perror("mount device failed");
			goto fail;
		}
	} else {
		char path[512];

		sprintf(path, "/tmp/hyper/shared/%s/", container->image);
		fprintf(stdout, "src directory %s\n", path);

		if (mount(path, root, NULL, MS_BIND, NULL) < 0) {
			perror("mount src dir failed");
			goto fail;
		}
	}

	fprintf(stdout, "root directory for container is %s/%s, init task %s\n",
		root, container->rootfs, container->exec.argv[0]);

	sprintf(oldroot, "%s/%s/.oldroot", root, container->rootfs);
	if (hyper_mkdir(oldroot) < 0) {
		perror("make oldroot directroy failed");
		goto fail;
	}

	if (mount("/", oldroot, NULL, MS_BIND|MS_REC, NULL) < 0) {
		perror("bind oldroot failed");
		goto fail;
	}
	/* reuse oldroot array */
	sprintf(oldroot, "%s/%s/", root, container->rootfs);
	/* pivot_root won't work, see
	 * Documention/filesystem/ramfs-rootfs-initramfs.txt */
	chroot(oldroot);

	chdir("/");

	if (container_setup_volume(container) < 0) {
		fprintf(stderr, "container sets up voulme failed\n");
		goto fail;
	}

	if (container_setup_mount(container) < 0) {
		fprintf(stderr, "container sets up mount failed\n");
		goto fail;
	}

	if (container_setup_sysctl(container) < 0) {
		fprintf(stderr, "container sets up sysctl failed\n");
		goto fail;
	}

	if (container_setup_dns(container) < 0) {
		fprintf(stderr, "container sets up dns failed\n");
		goto fail;
	}

	if (container_setup_workdir(container) < 0) {
		fprintf(stderr, "container sets up work directory failed\n");
		goto fail;
	}

	container_unmount_oldroot("/.oldroot");

	fflush(stdout);

	if (container_setup_tty(arg->pipe[1], container) < 0) {
		fprintf(stdout, "setup tty failed\n");
		goto fail;
	}

	symlink("/proc/self/fd", "/dev/fd");
	symlink("/proc/self/fd/0", "/dev/stdin");
	symlink("/proc/self/fd/1", "/dev/stdout");
	symlink("/proc/self/fd/2", "/dev/stderr");

	execvp(container->exec.argv[0], container->exec.argv);
	perror("exec container command failed");

	_exit(-1);

fail:
	hyper_send_type(arg->pipe[1], ERROR);
	_exit(-1);
}
Ejemplo n.º 2
0
static int hyper_container_init(void *data)
{
	struct hyper_container_arg *arg = data;
	struct hyper_container *container = arg->c;
	char root[512], oldroot[512];

	fprintf(stdout, "%s in\n", __func__);
	if (container->exec.argv == NULL) {
		fprintf(stdout, "no cmd!\n");
		goto fail;
	}

	if (hyper_rescan_scsi() < 0) {
		fprintf(stdout, "rescan scsi failed\n");
		goto fail;
	}

	if (container_setup_env(container) < 0) {
		fprintf(stdout, "setup env failed\n");
		goto fail;
	}

	if (mount("", "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
		perror("mount SLAVE failed");
		goto fail;
	}

	if (mount("", "/", NULL, MS_PRIVATE|MS_REC, NULL) < 0) {
		perror("mount PRIVATE failed");
		goto fail;
	}

	sprintf(root, "/tmp/hyper/%s/root/", container->id);
	if (hyper_mkdir(root) < 0) {
		perror("make root directroy failed");
		goto fail;
	}

	fprintf(stdout, "container root directory %s\n", root);

	if (container->fstype) {
		char dev[128];

		sprintf(dev, "/dev/%s", container->image);
		fprintf(stdout, "device %s\n", dev);

		if (mount(dev, root, container->fstype, 0, NULL) < 0) {
			perror("mount device failed");
			goto fail;
		}
	} else {
		char path[512];

		sprintf(path, "/tmp/hyper/shared/%s/", container->image);
		fprintf(stdout, "src directory %s\n", path);

		if (mount(path, root, NULL, MS_BIND, NULL) < 0) {
			perror("mount src dir failed");
			goto fail;
		}
	}

	fprintf(stdout, "root directory for container is %s/%s, init task %s\n",
		root, container->rootfs, container->exec.argv[0]);

	hyper_list_dir(root);
	sprintf(oldroot, "%s/%s/.oldroot", root, container->rootfs);
	if (hyper_mkdir(oldroot) < 0) {
		perror("make oldroot directroy failed");
		goto fail;
	}

	if (mount("/", oldroot, NULL, MS_BIND|MS_REC, NULL) < 0) {
		perror("bind oldroot failed");
		goto fail;
	}
	/* reuse oldroot array */
	sprintf(oldroot, "%s/%s/", root, container->rootfs);
	/* pivot_root won't work, see
	 * Documention/filesystem/ramfs-rootfs-initramfs.txt */
	chroot(oldroot);

	chdir("/");

	if (container_setup_volume(container) < 0) {
		fprintf(stderr, "container sets up voulme failed\n");
		goto fail;
	}

	if (container_setup_mount(container) < 0) {
		fprintf(stderr, "container sets up mount ns failed\n");
		goto fail;
	}

	if (container_setup_workdir(container) < 0) {
		fprintf(stderr, "container sets up work directory failed\n");
		goto fail;
	}

	container_unmount_oldroot("/.oldroot");

	fflush(stdout);

	if (container_setup_tty(arg->pipe[1], container) < 0) {
		fprintf(stdout, "setup tty failed\n");
		goto fail;
	}

	close(arg->pipe[0]);
	close(arg->pipe[1]);

	execvp(container->exec.argv[0], container->exec.argv);

	_exit(-1);

fail:
	container->exec.code = -1;
	hyper_send_type_block(arg->pipe[1], ERROR, 0);
	_exit(-1);
}