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|
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <string.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/vfs.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <linux/auto_fs4.h>
#include <linux/magic.h>
#include "zdtmtst.h"
#include "auto_dev-ioctl.h"
const char *test_doc = "Autofs (v5) migration test";
const char *test_author = "Stanislav Kinsburskii <stanislav.kinsburskiy@virtuozzo.com>";
char *dirname;
TEST_OPTION(dirname, string, "directory name", 1);
#define AUTOFS_DEV "/dev/autofs"
#define INDIRECT_MNT_DIR "mnt"
int autofs_dev;
task_waiter_t t;
static char *xvstrcat(char *str, const char *fmt, va_list args)
{
size_t offset = 0, delta;
int ret;
char *new;
va_list tmp;
if (str)
offset = strlen(str);
delta = strlen(fmt) * 2;
do {
ret = -ENOMEM;
new = realloc(str, offset + delta);
if (new) {
va_copy(tmp, args);
ret = vsnprintf(new + offset, delta, fmt, tmp);
if (ret >= delta) {
/* NOTE: vsnprintf returns the amount of bytes
* * to allocate. */
delta = ret +1;
str = new;
ret = 0;
}
}
} while (ret == 0);
if (ret == -ENOMEM) {
/* realloc failed. We must release former string */
pr_err("Failed to allocate string\n");
free(str);
} else if (ret < 0) {
/* vsnprintf failed */
pr_err("Failed to print string\n");
free(new);
new = NULL;
}
return new;
}
char *xstrcat(char *str, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
str = xvstrcat(str, fmt, args);
va_end(args);
return str;
}
char *xsprintf(const char *fmt, ...)
{
va_list args;
char *str;
va_start(args, fmt);
str = xvstrcat(NULL, fmt, args);
va_end(args);
return str;
}
struct autofs_params {
const char *mountpoint;
int (*create)(struct autofs_params *p);
int (*setup)(struct autofs_params *p);
int (*check)(struct autofs_params *p);
int (*reap)(struct autofs_params *p);
const unsigned type;
int fd;
struct stat fd_stat;
void (*onexit)(void);
const int close_pipe;
pid_t pid;
};
struct autofs_params *my_type;
static int stop;
static int setup_direct(struct autofs_params *p)
{
char *path;
path = xsprintf("%s/%s/direct_file", dirname, p->mountpoint);
if (!path) {
pr_err("failed to allocate path\n");
return -ENOMEM;
}
p->fd = open(path, O_CREAT | O_EXCL, 0600);
if (p->fd < 0) {
pr_perror("%d: failed to open file %s", getpid(), path);
return -errno;
}
if (fstat(p->fd, &p->fd_stat)) {
pr_perror("%d: failed to stat %s", getpid(), path);
return -errno;
}
free(path);
return 0;
}
static int setup_indirect(struct autofs_params *p)
{
char *path;
path = xsprintf("%s/%s/%s/indirect_file", dirname, p->mountpoint, INDIRECT_MNT_DIR);
if (!path) {
pr_err("failed to allocate path\n");
return -ENOMEM;
}
p->fd = open(path, O_CREAT | O_EXCL, 0600);
if (p->fd < 0) {
pr_perror("%d: failed to open file %s", getpid(), path);
return -errno;
}
if (fstat(p->fd, &p->fd_stat)) {
pr_perror("%d: failed to stat %s", getpid(), path);
return -errno;
}
free(path);
return 0;
}
static int umount_fs(const char *mountpoint, int magic)
{
struct statfs buf;
if (statfs(mountpoint, &buf)) {
pr_perror("%s: failed to statfs", mountpoint);
return -errno;
}
if (buf.f_type == magic) {
if (umount(mountpoint) < 0) {
pr_perror("failed to umount %s tmpfs", mountpoint);
return -errno;
}
}
return 0;
}
static int check_fd(struct autofs_params *p)
{
struct stat st;
int ret = 0;
if (fstat(p->fd, &st)) {
pr_perror("failed to stat fd %d", p->fd);
return -errno;
}
if (st.st_dev != p->fd_stat.st_dev) {
skip("%s: st_dev differs: %llu != %llu "
"(waiting for \"device namespaces\")", p->mountpoint,
(long long unsigned)st.st_dev,
(long long unsigned)p->fd_stat.st_dev);
// ret++;
}
if (st.st_mode != p->fd_stat.st_mode) {
pr_err("%s: st_mode differs: 0%o != 0%o\n", p->mountpoint,
st.st_mode, p->fd_stat.st_mode);
ret++;
}
if (st.st_nlink != p->fd_stat.st_nlink) {
pr_err("%s: st_nlink differs: %ld != %ld\n", p->mountpoint,
(long)st.st_nlink, (long)p->fd_stat.st_nlink);
ret++;
}
if (st.st_uid != p->fd_stat.st_uid) {
pr_err("%s: st_uid differs: %u != %u\n", p->mountpoint,
st.st_uid, p->fd_stat.st_uid);
ret++;
}
if (st.st_gid != p->fd_stat.st_gid) {
pr_err("%s: st_gid differs: %u != %u\n", p->mountpoint,
st.st_gid, p->fd_stat.st_gid);
ret++;
}
if (st.st_rdev != p->fd_stat.st_rdev) {
pr_err("%s: st_rdev differs: %lld != %lld\n", p->mountpoint,
(long long)st.st_rdev,
(long long)p->fd_stat.st_rdev);
ret++;
}
if (st.st_size != p->fd_stat.st_size) {
pr_err("%s: st_size differs: %lld != %lld\n", p->mountpoint,
(long long)st.st_size,
(long long)p->fd_stat.st_size);
ret++;
}
if (st.st_blksize != p->fd_stat.st_blksize) {
pr_err("%s: st_blksize differs %lld != %lld:\n", p->mountpoint,
(long long)st.st_blksize,
(long long)p->fd_stat.st_blksize);
ret++;
}
if (st.st_blocks != p->fd_stat.st_blocks) {
pr_err("%s: st_blocks differs: %lld != %lld\n", p->mountpoint,
(long long)st.st_blocks,
(long long)p->fd_stat.st_blocks);
ret++;
}
return ret;
}
static int check_automount(struct autofs_params *p)
{
int err;
char *mountpoint;
err = check_fd(p);
if (err) {
pr_err("%s: opened file descriptor wasn't migrated properly\n",
p->mountpoint);
return err;
}
if (p->type == AUTOFS_TYPE_DIRECT)
mountpoint = xsprintf("%s/%s", dirname, p->mountpoint);
else if (p->type == AUTOFS_TYPE_INDIRECT)
mountpoint = xsprintf("%s/%s/%s", dirname, p->mountpoint, INDIRECT_MNT_DIR);
else {
pr_err("Unknown autofs type: %d\n", p->type);
return -EINVAL;
}
if (!mountpoint) {
pr_err("failed to allocate string\n");
return -ENOMEM;
}
if (close(p->fd)) {
pr_err("%s: failed to close fd %d\n", p->mountpoint, p->fd);
return -errno;
}
err = umount_fs(mountpoint, TMPFS_MAGIC);
if (err)
return err;
free(mountpoint);
err = p->setup(p);
if (err) {
pr_err("autofs doesn't workafter restore\n");
return err;
}
if (close(p->fd)) {
pr_perror("%s: failed to close fd %d", mountpoint,
p->fd);
return -errno;
}
return 0;
}
static int autofs_dev_open(void)
{
int fd;
if (access(AUTOFS_DEV, R_OK | W_OK)) {
pr_perror("Device /dev/autofs is not accessible");
return -1;
}
fd = open(AUTOFS_DEV, O_RDONLY);
if (fd == -1) {
pr_perror("failed to open /dev/autofs");
return -errno;
}
return fd;
}
static int autofs_open_mount(int devid, const char *mountpoint)
{
struct autofs_dev_ioctl *param;
size_t size;
int fd;
size = sizeof(struct autofs_dev_ioctl) + strlen(mountpoint) + 1;
param = malloc(size);
init_autofs_dev_ioctl(param);
param->size = size;
param->ioctlfd = -1;
param->openmount.devid = devid;
strcpy(param->path, mountpoint);
if (ioctl(autofs_dev, AUTOFS_DEV_IOCTL_OPENMOUNT, param) < 0) {
pr_perror("failed to open autofs mount %s", mountpoint);
return -errno;
}
fd = param->ioctlfd;
free(param);
return fd;
}
static int autofs_report_result(int token, int devid, const char *mountpoint,
int result)
{
int ioctl_fd;
struct autofs_dev_ioctl param;
int err;
ioctl_fd = autofs_open_mount(devid, mountpoint);
if (ioctl_fd < 0) {
pr_err("failed to open autofs mountpoint %s\n", mountpoint);
return ioctl_fd;
}
init_autofs_dev_ioctl(¶m);
param.ioctlfd = ioctl_fd;
if (result) {
param.fail.token = token;
param.fail.status = result;
} else
param.ready.token = token;
err = ioctl(autofs_dev, result ? AUTOFS_DEV_IOCTL_FAIL : AUTOFS_DEV_IOCTL_READY, ¶m);
if (err) {
pr_perror("failed to report result to autofs mountpoint %s", mountpoint);
err = -errno;
}
close(ioctl_fd);
return err;
}
static int mount_tmpfs(const char *mountpoint)
{
struct statfs buf;
if (statfs(mountpoint, &buf)) {
pr_perror("failed to statfs %s", mountpoint);
return -errno;
}
if (buf.f_type == TMPFS_MAGIC)
return 0;
if (mount("autofs_test", mountpoint, "tmpfs", 0, "size=1M") < 0) {
pr_perror("failed to mount tmpfs to %s",
mountpoint);
return -errno;
}
return 0;
}
static int autofs_mount_direct(const char *mountpoint,
const struct autofs_v5_packet *packet)
{
int err;
const char *direct_mnt = mountpoint;
err = mount_tmpfs(direct_mnt);
if (err)
pr_err("%d: failed to mount direct autofs mountpoint\n",
getpid());
return err;
}
static int autofs_mount_indirect(const char *mountpoint,
const struct autofs_v5_packet *packet)
{
char *indirect_mnt;
int err;
indirect_mnt = xsprintf("%s/%s", mountpoint, packet->name);
if (!indirect_mnt) {
pr_err("failed to allocate indirect mount path\n");
return -ENOMEM;
}
if ((mkdir(indirect_mnt, 0755) < 0) && (errno != EEXIST)) {
pr_perror("failed to create %s directory", indirect_mnt);
return -errno;
}
err = mount_tmpfs(indirect_mnt);
if (err)
pr_err("%d: failed to mount indirect autofs mountpoint\n",
getpid());
return err;
}
static int automountd_serve(const char *mountpoint, struct autofs_params *p,
const union autofs_v5_packet_union *packet)
{
const struct autofs_v5_packet *v5_packet = &packet->v5_packet;
int err, res;
switch (packet->hdr.type) {
case autofs_ptype_missing_indirect:
res = autofs_mount_indirect(mountpoint, v5_packet);
break;
case autofs_ptype_missing_direct:
res = autofs_mount_direct(mountpoint, v5_packet);
break;
case autofs_ptype_expire_indirect:
pr_err("%d: expire request for indirect mount %s?",
getpid(), v5_packet->name);
return -EINVAL;
case autofs_ptype_expire_direct:
pr_err("%d: expire request for direct mount?",
getpid());
return -EINVAL;
default:
pr_err("unknown request type: %d\n", packet->hdr.type);
return -EINVAL;
}
err = autofs_report_result(v5_packet->wait_queue_token, v5_packet->dev,
mountpoint, res);
if (err)
return err;
return res;
}
static int automountd_loop(int pipe, const char *mountpoint, struct autofs_params *param)
{
union autofs_v5_packet_union *packet;
ssize_t bytes;
size_t psize = sizeof(*packet);
int err = 0;
packet = malloc(psize);
if (!packet) {
pr_err("failed to allocate autofs packet\n");
return -ENOMEM;
}
/* Allow SIGUSR2 to interrupt system call */
siginterrupt(SIGUSR2, 1);
while (!stop && !err) {
memset(packet, 0, psize);
bytes = read(pipe, packet, psize);
if (bytes < 0) {
if (errno != EINTR) {
pr_perror("failed to read packet");
return -errno;
}
continue;
}
if (bytes != psize) {
pr_err("read less than expected: %zd < %zd\n",
bytes, psize);
return -EINVAL;
}
err = automountd_serve(mountpoint, param, packet);
if (err)
pr_err("request to autofs failed: %d\n", err);
}
return err;
}
static int automountd(struct autofs_params *p, int control_fd)
{
int pipes[2];
char *autofs_path;
char *options;
int ret = -1;
char *type;
my_type = p;
if (p->onexit)
atexit(p->onexit);
autofs_path = xsprintf("%s/%s", dirname, p->mountpoint);
if (!autofs_path) {
pr_err("failed to allocate autofs path");
goto err;
}
if (pipe(pipes) < 0) {
pr_perror("%d: failed to create pipe", getpid());
goto err;
}
if (setpgrp() < 0) {
pr_perror("failed to become a process group leader");
goto err;
}
switch (p->type) {
case AUTOFS_TYPE_DIRECT:
type = "direct";
break;
case AUTOFS_TYPE_INDIRECT:
type = "indirect";
break;
case AUTOFS_TYPE_OFFSET:
type = "offset";
break;
default:
pr_err("unknown autofs type: %d\n", p->type);
return -EINVAL;
}
options = xsprintf("fd=%d,pgrp=%d,minproto=5,maxproto=5,%s",
pipes[1], getpgrp(), type);
if (!options) {
pr_err("failed to allocate autofs options\n");
goto err;
}
if (mkdir(autofs_path, 0600) < 0) {
pr_perror("failed to create %s", autofs_path);
test_msg("cwd: %s\n", get_current_dir_name());
goto err;
}
if (mount("autofs_test", autofs_path, "autofs", 0, options) < 0) {
pr_perror("failed to mount autofs with options \"%s\"",
options);
goto err;
}
if (p->close_pipe)
close(pipes[1]);
ret = 0;
if (write(control_fd, &ret, sizeof(ret)) != sizeof(ret)) {
pr_perror("failed to send result");
goto err;
}
close(control_fd);
task_waiter_complete(&t, getpid());
return automountd_loop(pipes[0], autofs_path, p);
err:
if (write(control_fd, &ret, sizeof(ret) != sizeof(ret))) {
pr_perror("failed to send result");
return -errno;
}
return ret;
}
static int start_automounter(struct autofs_params *p)
{
int pid;
int control_fd[2];
ssize_t bytes;
int ret;
if (pipe(control_fd) < 0) {
pr_perror("failed to create control_fd pipe");
return -errno;
}
pid = test_fork();
switch (pid) {
case -1:
pr_perror("failed to fork");
return -1;
case 0:
close(control_fd[0]);
exit(automountd(p, control_fd[1]));
}
task_waiter_wait4(&t, pid);
p->pid = pid;
close(control_fd[1]);
bytes = read(control_fd[0], &ret, sizeof(ret));
close(control_fd[0]);
if (bytes < 0) {
pr_perror("failed to get start result");
return -errno;
}
if (bytes != sizeof(ret)) {
pr_err("received less than expected: %zu. Child %d died?\n",
bytes, p->pid);
return -EINVAL;
}
return ret;
}
static void do_stop(int sig)
{
stop = 1;
}
static int reap_child(struct autofs_params *p)
{
int status;
int pid = p->pid;
if (kill(pid, SIGUSR2)) {
pr_perror("failed to kill child %d", pid);
return -errno;
}
if (waitpid(pid, &status, 0) == -1) {
pr_perror("failed to collect child %d", pid);
return -errno;
}
if (WIFSIGNALED(status)) {
pr_err("Child was killed by %d\n", WTERMSIG(status));
return -1;
}
return WEXITSTATUS(status);
}
static int reap_catatonic(struct autofs_params *p)
{
char *mountpoint;
int err;
mountpoint = xsprintf("%s/%s", dirname, p->mountpoint);
if (!mountpoint) {
pr_err("failed to allocate string\n");
return -ENOMEM;
}
err = umount_fs(mountpoint, AUTOFS_SUPER_MAGIC);
if (!err) {
if (rmdir(mountpoint) < 0) {
skip("failed to remove %s directory: %s\n", mountpoint,
strerror(errno));
err = -errno;
}
}
return err;
}
static int setup_catatonic(struct autofs_params *p)
{
char *path;
path = xsprintf("%s/%s/file", dirname, p->mountpoint);
if (!path) {
pr_err("failed to allocate path\n");
return -ENOMEM;
}
p->fd = open(path, O_CREAT | O_EXCL, 0600);
if (p->fd >= 0) {
pr_perror("%d: was able to open file %s on catatonic mount", getpid(), path);
return -EINVAL;
}
free(path);
return 0;
}
static int check_catatonic(struct autofs_params *p)
{
char *mountpoint;
struct statfs buf;
mountpoint = xsprintf("%s/%s", dirname, p->mountpoint);
if (!mountpoint) {
pr_err("failed to allocate path\n");
return -ENOMEM;
}
if (statfs(mountpoint, &buf)) {
pr_perror("%s: failed to statfs", mountpoint);
return -errno;
}
if (buf.f_type != AUTOFS_SUPER_MAGIC) {
pr_err("Non-autofs mount on path %s\n", mountpoint);
return -EINVAL;
}
return setup_catatonic(p);
}
static int create_catatonic(struct autofs_params *p)
{
int err;
int status;
err = start_automounter(p);
if (err)
return err;
if (kill(p->pid, SIGKILL)) {
pr_perror("failed to kill child %d", p->pid);
return -errno;
}
if (waitpid(p->pid, &status, 0) == -1) {
pr_perror("failed to collect child %d", p->pid);
return -errno;
}
return 0;
}
static void test_exit(void)
{
if (rmdir(dirname) < 0)
skip("failed to remove %s directory: %s\n", dirname,
strerror(errno));
}
typedef enum {
AUTOFS_START,
AUTOFS_SETUP,
AUTOFS_CHECK,
AUTOFS_STOP
} autfs_test_action;
static int test_action(autfs_test_action act, struct autofs_params *p)
{
int ret = 0;
while(p->mountpoint) {
int (*action)(struct autofs_params *p);
switch (act) {
case AUTOFS_START:
action = p->create;
break;
case AUTOFS_SETUP:
action = p->setup;
break;
case AUTOFS_CHECK:
action = p->check;
break;
case AUTOFS_STOP:
action = p->reap;
break;
default:
pr_err("unknown action: %d\n", act);
return -1;
}
if (action && action(p))
ret++;
p++;
}
return ret;
}
static void direct_exit(void)
{
struct autofs_params *p = my_type;
char *mountpoint;
mountpoint = xsprintf("%s/%s", dirname, p->mountpoint);
if (!mountpoint) {
pr_err("failed to allocate string\n");
return;
}
if (umount_fs(mountpoint, TMPFS_MAGIC))
return;
if (umount_fs(mountpoint, AUTOFS_SUPER_MAGIC))
return;
if (rmdir(mountpoint) < 0)
skip("failed to remove %s directory: %s\n", mountpoint,
strerror(errno));
}
static void indirect_exit(void)
{
struct autofs_params *p = my_type;
char *mountpoint, *tmpfs;
mountpoint = xsprintf("%s/%s", dirname, p->mountpoint);
if (!mountpoint) {
pr_err("failed to allocate string\n");
return;
}
tmpfs = xsprintf("%s/%s/%s", dirname, p->mountpoint, INDIRECT_MNT_DIR);
if (!tmpfs) {
pr_err("failed to allocate string\n");
return;
}
if (!access(tmpfs, F_OK)) {
if (umount_fs(tmpfs, TMPFS_MAGIC))
return;
}
if (umount_fs(mountpoint, AUTOFS_SUPER_MAGIC))
return;
if (rmdir(mountpoint) < 0)
skip("failed to remove %s directory: %s\n", mountpoint,
strerror(errno));
}
enum autofs_tests {
AUTOFS_DIRECT,
AUTOFS_INDIRECT,
AUTOFS_CATATONIC,
};
struct autofs_params autofs_types[] = {
[AUTOFS_DIRECT] = {
.mountpoint = "direct",
.create = start_automounter,
.setup = setup_direct,
.check = check_automount,
.reap = reap_child,
.type = AUTOFS_TYPE_DIRECT,
.fd = -1,
.onexit = direct_exit,
.close_pipe = 1,
},
[AUTOFS_INDIRECT] = {
.mountpoint = "indirect",
.create = start_automounter,
.setup = setup_indirect,
.check = check_automount,
.reap = reap_child,
.type = AUTOFS_TYPE_INDIRECT,
.fd = -1,
.onexit = indirect_exit,
.close_pipe = 0,
},
[AUTOFS_CATATONIC] = {
.mountpoint = "catatonic",
.create = create_catatonic,
.setup = setup_catatonic,
.check = check_catatonic,
.reap = reap_catatonic,
.type = AUTOFS_TYPE_DIRECT,
.onexit = NULL,
.fd = -1,
.close_pipe = 1,
},
{ NULL, NULL, NULL, NULL }
};
int main(int argc, char **argv)
{
int ret = 0;
test_init(argc, argv);
task_waiter_init(&t);
if (mkdir(dirname, 0777) < 0) {
pr_perror("failed to create %s directory", dirname);
return -1;
}
autofs_dev = autofs_dev_open();
if (autofs_dev < 0)
return -1;
if (signal(SIGUSR2, do_stop) == SIG_ERR) {
pr_perror("Failed to set SIGUSR2 handler");
return -1;
}
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
pr_perror("Failed to set SIGPIPE handler");
return -1;
}
if (test_action(AUTOFS_START, autofs_types)) {
pr_err("AUTOFS_START action failed\n");
ret++;
goto err;
}
close(autofs_dev);
atexit(test_exit);
if (test_action(AUTOFS_SETUP, autofs_types)) {
pr_err("AUTOFS_SETUP action failed\n");
ret++;
goto err;
}
test_daemon();
test_waitsig();
if (test_action(AUTOFS_CHECK, autofs_types)) {
pr_err("AUTOFS_CHECK action failed\n");
ret++;
}
err:
if (test_action(AUTOFS_STOP, autofs_types)) {
pr_err("AUTOFS_STOP action failed\n");
ret++;
}
if (ret) {
fail();
return ret;
}
pass();
return 0;
}
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