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/*
* Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/*
* Testcase: drmGetMagic() and drmAuthMagic()
*/
#include "igt.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sched.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/poll.h>
#include <sys/resource.h>
#include "drm.h"
#ifndef __linux__
# include <pthread.h>
#endif
IGT_TEST_DESCRIPTION("Call drmGetMagic() and drmAuthMagic() and see if it behaves.");
static bool
is_local_tid(pid_t tid)
{
#ifndef __linux__
return pthread_self() == tid;
#else
/* On Linux systems, drmGetClient() would return the thread ID
instead of the actual process ID */
return gettid() == tid;
#endif
}
static bool check_auth(int fd)
{
pid_t client_pid;
int i, auth, pid, uid;
unsigned long magic, iocs;
bool is_authenticated = false;
client_pid = getpid();
for (i = 0; !is_authenticated; i++) {
if (drmGetClient(fd, i, &auth, &pid, &uid, &magic, &iocs) != 0)
break;
is_authenticated = auth && (pid == client_pid || is_local_tid(pid));
}
return is_authenticated;
}
static int magic_cmp(const void *p1, const void *p2)
{
return *(const drm_magic_t*)p1 < *(const drm_magic_t*)p2;
}
static void test_many_magics(int master)
{
drm_magic_t magic, *magics = NULL;
unsigned int i, j, ns, allocated = 0;
char path[512];
int *fds = NULL, slave;
struct rlimit fd_limit;
do_or_die(getrlimit(RLIMIT_NOFILE, &fd_limit));
fd_limit.rlim_cur = 1024;
do_or_die(setrlimit(RLIMIT_NOFILE, &fd_limit));
sprintf(path, "/proc/self/fd/%d", master);
for (i = 0; ; ++i) {
/* open slave and make sure it's NOT a master */
slave = open(path, O_RDWR | O_CLOEXEC);
if (slave < 0) {
igt_info("Reopening device failed after %d opens\n", i);
igt_assert(errno == EMFILE);
break;
}
igt_assert(drmSetMaster(slave) < 0);
/* resize magic-map */
if (i >= allocated) {
ns = allocated * 2;
igt_assert(ns >= allocated);
if (!ns)
ns = 128;
magics = realloc(magics, sizeof(*magics) * ns);
igt_assert(magics);
fds = realloc(fds, sizeof(*fds) * ns);
igt_assert(fds);
allocated = ns;
}
/* insert magic */
igt_assert(drmGetMagic(slave, &magic) == 0);
igt_assert(magic > 0);
magics[i] = magic;
fds[i] = slave;
}
/* make sure we could at least open a reasonable number of files */
igt_assert(i > 128);
/*
* We cannot open the DRM file anymore. Lets sort the magic-map and
* verify no magic was used multiple times.
*/
qsort(magics, i, sizeof(*magics), magic_cmp);
for (j = 1; j < i; ++j)
igt_assert(magics[j] != magics[j - 1]);
/* make sure we can authenticate all of them */
for (j = 0; j < i; ++j)
igt_assert(drmAuthMagic(master, magics[j]) == 0);
/* close files again */
for (j = 0; j < i; ++j)
close(fds[j]);
free(fds);
free(magics);
}
static void test_basic_auth(int master)
{
drm_magic_t magic, old_magic;
int slave;
/* open slave and make sure it's NOT a master */
slave = drm_open_driver(DRIVER_ANY);
igt_require(slave >= 0);
igt_require(drmSetMaster(slave) < 0);
/* retrieve magic for slave */
igt_assert(drmGetMagic(slave, &magic) == 0);
igt_assert(magic > 0);
/* verify the same magic is returned every time */
old_magic = magic;
igt_assert(drmGetMagic(slave, &magic) == 0);
igt_assert_eq(magic, old_magic);
/* verify magic can be authorized exactly once, on the master */
igt_assert(drmAuthMagic(slave, magic) < 0);
igt_assert(drmAuthMagic(master, magic) == 0);
igt_assert(drmAuthMagic(master, magic) < 0);
/* verify that the magic did not change */
old_magic = magic;
igt_assert(drmGetMagic(slave, &magic) == 0);
igt_assert_eq(magic, old_magic);
close(slave);
}
igt_main
{
int master;
/* root (which we run igt as) should always be authenticated */
igt_describe("Check drm client is always authenticated.");
igt_subtest("getclient-simple") {
int fd = drm_open_driver(DRIVER_ANY);
igt_assert(check_auth(fd) == true);
close(fd);
}
igt_describe("Use 2 clients, check second is authenticated even when first dropped.");
igt_subtest("getclient-master-drop") {
int fd = drm_open_driver(DRIVER_ANY);
int fd2 = drm_open_driver(DRIVER_ANY);
igt_assert(check_auth(fd2) == true);
close(fd);
igt_assert(check_auth(fd2) == true);
close(fd2);
}
/* above tests require that no drm fd is open */
igt_subtest_group {
igt_fixture
master = drm_open_driver_master(DRIVER_ANY);
igt_describe("Test magic numbers for master and slave.");
igt_subtest("basic-auth")
test_basic_auth(master);
/* this must be last, we adjust the rlimit */
igt_describe("Test authentication and magic numbers uniqness for rlimit slaves.");
igt_subtest("many-magics")
test_many_magics(master);
}
}
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