| /* |
| * 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; |
| int 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; |
| } |
| |
| 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_check_driver_(const char *driver) |
| { |
| if (!tst_search_driver(driver, "modules.dep") || |
| !tst_search_driver(driver, "modules.builtin")) |
| return 0; |
| |
| return -1; |
| } |
| |
| int tst_check_driver(const char *driver) |
| { |
| #ifdef __ANDROID__ |
| /* |
| * Android may not have properly installed modules.* files. We could |
| * search modules in /system/lib/modules, but to to determine built-in |
| * drivers we need modules.builtin. Therefore assume all drivers are |
| * available. |
| */ |
| return 0; |
| #endif |
| |
| if (!tst_check_driver_(driver)) |
| 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_check_driver_(driver2); |
| free(driver2); |
| } |
| |
| return ret; |
| } |