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/*
* Copyright © 2019 Intel Corporation
*
* 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.
*/
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "drmtest.h"
#include "i915/gem.h"
#include "i915/gem_engine_topology.h"
#include "igt_sysfs.h"
static bool may_write(int dir, const char *file)
{
struct stat st;
igt_assert(fstatat(dir, file, &st, 0) == 0);
return st.st_mode & 0222;
}
static void test_writable(int i915, int engine)
{
struct dirent *de;
int defaults;
DIR *dir;
defaults = openat(engine, ".defaults", O_DIRECTORY);
igt_require(defaults != -1);
dir = fdopendir(engine);
while ((de = readdir(dir))) {
if (!(de->d_type & DT_REG))
continue;
if (!may_write(engine, de->d_name)) {
igt_debug("Skipping constant attr '%s'\n", de->d_name);
continue;
}
igt_debug("Checking attr '%s'\n", de->d_name);
/* Every attribute should have a default value */
igt_assert_f(faccessat(defaults, de->d_name, F_OK, 0) == 0,
"default value for %s not accessible\n",
de->d_name);
/* But no one is allowed to change the default */
igt_assert_f(!may_write(defaults, de->d_name),
"default value for %s writable!\n",
de->d_name);
igt_assert_f(!igt_sysfs_set(defaults, de->d_name, "garbage"),
"write into default value of %s succeeded!\n",
de->d_name);
}
closedir(dir);
}
igt_main
{
int i915 = -1, engines = -1;
igt_fixture {
int sys;
i915 = drm_open_driver(DRIVER_INTEL);
igt_require_gem(i915);
igt_allow_hang(i915, 0, 0);
sys = igt_sysfs_open(i915);
igt_require(sys != -1);
engines = openat(sys, "engine", O_RDONLY);
igt_require(engines != -1);
close(sys);
}
igt_subtest_with_dynamic("readonly")
dyn_sysfs_engines(i915, engines, NULL, test_writable);
igt_fixture {
close(engines);
close(i915);
}
}
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