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/*
* Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
* Copyright (c) 2020-2021 Petr Vorel <pvorel@suse.cz>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/personality.h>
#include <sys/utsname.h>
#include <limits.h>
#include "test.h"
#include "tst_kernel.h"
#include "old_safe_stdio.h"
static int get_kernel_bits_from_uname(struct utsname *buf)
{
if (uname(buf)) {
tst_brkm(TBROK | TERRNO, NULL, "uname()");
return -1;
}
return strstr(buf->machine, "64") ? 64 : 32;
}
int tst_kernel_bits(void)
{
struct utsname buf;
static int kernel_bits;
if (kernel_bits)
return kernel_bits;
kernel_bits = get_kernel_bits_from_uname(&buf);
if (kernel_bits == -1)
return -1;
/*
* ARM64 (aarch64) defines 32-bit compatibility modes as
* armv8l and armv8b (little and big endian).
* s390x is 64bit but not contain 64 in the words.
*/
if (!strcmp(buf.machine, "armv8l") || !strcmp(buf.machine, "armv8b")
|| !strcmp(buf.machine, "s390x"))
kernel_bits = 64;
#ifdef __ANDROID__
/* Android's bionic libc sets the PER_LINUX32 personality for all 32-bit
* programs. This will cause buf.machine to report as i686 even though
* the kernel itself is 64-bit.
*/
if (!strcmp(buf.machine, "i686") &&
(personality(0xffffffff) & PER_MASK) == PER_LINUX32) {
/* Set the personality back to the default. */
if (personality(PER_LINUX) == -1) {
tst_brkm(TBROK | TERRNO, NULL, "personality()");
return -1;
}
/* Redo the uname check without the PER_LINUX32 personality to
* determine the actual kernel bits value.
*/
kernel_bits = get_kernel_bits_from_uname(&buf);
if (kernel_bits == -1)
return -1;
/* Set the personality back to PER_LINUX32. */
if (personality(PER_LINUX32) == -1) {
tst_brkm(TBROK | TERRNO, NULL, "personality()");
return -1;
}
}
#endif /* __ANDROID__ */
tst_resm(TINFO, "uname.machine=%s kernel is %ibit",
buf.machine, kernel_bits);
return kernel_bits;
}
static int tst_search_driver_(const char *driver, const char *file)
{
struct stat st;
char buf[PATH_MAX];
char *path = NULL, *search = NULL, *sep = NULL;
FILE *f;
int ret = -1;
struct utsname uts;
if (uname(&uts)) {
tst_brkm(TBROK | TERRNO, NULL, "uname() failed");
return -1;
}
SAFE_ASPRINTF(NULL, &path, "/lib/modules/%s/%s", uts.release, file);
if (stat(path, &st) || !(S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) {
tst_resm(TWARN, "expected file %s does not exist or not a file", path);
return -1;
}
if (access(path, R_OK)) {
tst_resm(TWARN, "file %s cannot be read", path);
return -1;
}
/* always search for x86_64 */
char *fix = strstr(driver, "x86-64");
if (fix)
fix[3] = '_';
SAFE_ASPRINTF(NULL, &search, "/%s.ko", driver);
f = SAFE_FOPEN(NULL, path, "r");
while (fgets(buf, sizeof(buf), f)) {
/* cut dependencies after : */
if ((sep = strchr(buf, ':')))
*sep = 0;
/* driver found */
if (strstr(buf, search) != NULL) {
ret = 0;
break;
}
}
SAFE_FCLOSE(NULL, f);
free(search);
free(path);
return ret;
}
static int tst_search_driver(const char *driver, const char *file)
{
#ifdef __ANDROID__
/*
* Android may not have properly installed modules.* files. We could
* search modules in /system/lib/modules, but to determine built-in
* drivers we need modules.builtin. Therefore assume all drivers are
* available.
*/
return 0;
#endif
if (!tst_search_driver_(driver, file))
return 0;
int ret = -1;
if (strrchr(driver, '-') || strrchr(driver, '_')) {
char *driver2 = strdup(driver);
char *ix = driver2;
char find = '-', replace = '_';
if (strrchr(driver, '_')) {
find = '_';
replace = '-';
}
while ((ix = strchr(ix, find)))
*ix++ = replace;
ret = tst_search_driver_(driver2, file);
free(driver2);
}
return ret;
}
int tst_check_builtin_driver(const char *driver)
{
if (!tst_search_driver(driver, "modules.builtin"))
return 0;
return -1;
}
int tst_check_driver(const char *driver)
{
if (!tst_search_driver(driver, "modules.dep") ||
!tst_search_driver(driver, "modules.builtin"))
return 0;
return -1;
}
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