diff options
Diffstat (limited to 'tools/testing/selftests/clone3/clone3.c')
| -rw-r--r-- | tools/testing/selftests/clone3/clone3.c | 295 |
1 files changed, 215 insertions, 80 deletions
diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c index f14c269a5a18..3c9bf0cd82a8 100644 --- a/tools/testing/selftests/clone3/clone3.c +++ b/tools/testing/selftests/clone3/clone3.c @@ -7,6 +7,7 @@ #include <inttypes.h> #include <linux/types.h> #include <linux/sched.h> +#include <stdbool.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> @@ -20,13 +21,6 @@ #include "../kselftest.h" #include "clone3_selftests.h" -/* - * Different sizes of struct clone_args - */ -#ifndef CLONE3_ARGS_SIZE_V0 -#define CLONE3_ARGS_SIZE_V0 64 -#endif - enum test_mode { CLONE3_ARGS_NO_TEST, CLONE3_ARGS_ALL_0, @@ -38,13 +32,13 @@ enum test_mode { static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode) { - struct clone_args args = { + struct __clone_args args = { .flags = flags, .exit_signal = SIGCHLD, }; struct clone_args_extended { - struct clone_args args; + struct __clone_args args; __aligned_u64 excess_space[2]; } args_ext; @@ -52,13 +46,19 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode) int status; memset(&args_ext, 0, sizeof(args_ext)); - if (size > sizeof(struct clone_args)) + if (size > sizeof(struct __clone_args)) args_ext.excess_space[1] = 1; if (size == 0) - size = sizeof(struct clone_args); + size = sizeof(struct __clone_args); switch (test_mode) { + case CLONE3_ARGS_NO_TEST: + /* + * Uses default 'flags' and 'SIGCHLD' + * assignment. + */ + break; case CLONE3_ARGS_ALL_0: args.flags = 0; args.exit_signal = 0; @@ -77,9 +77,9 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode) break; } - memcpy(&args_ext.args, &args, sizeof(struct clone_args)); + memcpy(&args_ext.args, &args, sizeof(struct __clone_args)); - pid = sys_clone3((struct clone_args *)&args_ext, size); + pid = sys_clone3((struct __clone_args *)&args_ext, size); if (pid < 0) { ksft_print_msg("%s - Failed to create new process\n", strerror(errno)); @@ -104,8 +104,8 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode) return 0; } -static void test_clone3(uint64_t flags, size_t size, int expected, - enum test_mode test_mode) +static bool test_clone3(uint64_t flags, size_t size, int expected, + enum test_mode test_mode) { int ret; @@ -115,88 +115,223 @@ static void test_clone3(uint64_t flags, size_t size, int expected, ret = call_clone3(flags, size, test_mode); ksft_print_msg("[%d] clone3() with flags says: %d expected %d\n", getpid(), ret, expected); - if (ret != expected) - ksft_test_result_fail( + if (ret != expected) { + ksft_print_msg( "[%d] Result (%d) is different than expected (%d)\n", getpid(), ret, expected); - else - ksft_test_result_pass( - "[%d] Result (%d) matches expectation (%d)\n", - getpid(), ret, expected); -} - -int main(int argc, char *argv[]) -{ - pid_t pid; - - uid_t uid = getuid(); - - test_clone3_supported(); - ksft_print_header(); - ksft_set_plan(17); - - /* Just a simple clone3() should return 0.*/ - test_clone3(0, 0, 0, CLONE3_ARGS_NO_TEST); + return false; + } - /* Do a clone3() in a new PID NS.*/ - if (uid == 0) - test_clone3(CLONE_NEWPID, 0, 0, CLONE3_ARGS_NO_TEST); - else - ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n"); + return true; +} - /* Do a clone3() with CLONE3_ARGS_SIZE_V0. */ - test_clone3(0, CLONE3_ARGS_SIZE_V0, 0, CLONE3_ARGS_NO_TEST); +typedef bool (*filter_function)(void); +typedef size_t (*size_function)(void); - /* Do a clone3() with CLONE3_ARGS_SIZE_V0 - 8 */ - test_clone3(0, CLONE3_ARGS_SIZE_V0 - 8, -EINVAL, CLONE3_ARGS_NO_TEST); +static bool not_root(void) +{ + if (getuid() != 0) { + ksft_print_msg("Not running as root\n"); + return true; + } - /* Do a clone3() with sizeof(struct clone_args) + 8 */ - test_clone3(0, sizeof(struct clone_args) + 8, 0, CLONE3_ARGS_NO_TEST); + return false; +} - /* Do a clone3() with exit_signal having highest 32 bits non-zero */ - test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG); +static bool no_timenamespace(void) +{ + if (not_root()) + return true; - /* Do a clone3() with negative 32-bit exit_signal */ - test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG); + if (!access("/proc/self/ns/time", F_OK)) + return false; - /* Do a clone3() with exit_signal not fitting into CSIGNAL mask */ - test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG); + ksft_print_msg("Time namespaces are not supported\n"); + return true; +} - /* Do a clone3() with NSIG < exit_signal < CSIG */ - test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG); +static size_t page_size_plus_8(void) +{ + return getpagesize() + 8; +} - test_clone3(0, sizeof(struct clone_args) + 8, 0, CLONE3_ARGS_ALL_0); +struct test { + const char *name; + uint64_t flags; + size_t size; + size_function size_function; + int expected; + enum test_mode test_mode; + filter_function filter; +}; - test_clone3(0, sizeof(struct clone_args) + 16, -E2BIG, - CLONE3_ARGS_ALL_0); +static const struct test tests[] = { + { + .name = "simple clone3()", + .flags = 0, + .size = 0, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "clone3() in a new PID_NS", + .flags = CLONE_NEWPID, + .size = 0, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + .filter = not_root, + }, + { + .name = "CLONE_ARGS_SIZE_VER0", + .flags = 0, + .size = CLONE_ARGS_SIZE_VER0, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "CLONE_ARGS_SIZE_VER0 - 8", + .flags = 0, + .size = CLONE_ARGS_SIZE_VER0 - 8, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "sizeof(struct clone_args) + 8", + .flags = 0, + .size = sizeof(struct __clone_args) + 8, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "exit_signal with highest 32 bits non-zero", + .flags = 0, + .size = 0, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG, + }, + { + .name = "negative 32-bit exit_signal", + .flags = 0, + .size = 0, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG, + }, + { + .name = "exit_signal not fitting into CSIGNAL mask", + .flags = 0, + .size = 0, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG, + }, + { + .name = "NSIG < exit_signal < CSIG", + .flags = 0, + .size = 0, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG, + }, + { + .name = "Arguments sizeof(struct clone_args) + 8", + .flags = 0, + .size = sizeof(struct __clone_args) + 8, + .expected = 0, + .test_mode = CLONE3_ARGS_ALL_0, + }, + { + .name = "Arguments sizeof(struct clone_args) + 16", + .flags = 0, + .size = sizeof(struct __clone_args) + 16, + .expected = -E2BIG, + .test_mode = CLONE3_ARGS_ALL_0, + }, + { + .name = "Arguments sizeof(struct clone_arg) * 2", + .flags = 0, + .size = sizeof(struct __clone_args) + 16, + .expected = -E2BIG, + .test_mode = CLONE3_ARGS_ALL_0, + }, + { + .name = "Arguments > page size", + .flags = 0, + .size_function = page_size_plus_8, + .expected = -E2BIG, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "CLONE_ARGS_SIZE_VER0 in a new PID NS", + .flags = CLONE_NEWPID, + .size = CLONE_ARGS_SIZE_VER0, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + .filter = not_root, + }, + { + .name = "CLONE_ARGS_SIZE_VER0 - 8 in a new PID NS", + .flags = CLONE_NEWPID, + .size = CLONE_ARGS_SIZE_VER0 - 8, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "sizeof(struct clone_args) + 8 in a new PID NS", + .flags = CLONE_NEWPID, + .size = sizeof(struct __clone_args) + 8, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + .filter = not_root, + }, + { + .name = "Arguments > page size in a new PID NS", + .flags = CLONE_NEWPID, + .size_function = page_size_plus_8, + .expected = -E2BIG, + .test_mode = CLONE3_ARGS_NO_TEST, + }, + { + .name = "New time NS", + .flags = CLONE_NEWTIME, + .size = 0, + .expected = 0, + .test_mode = CLONE3_ARGS_NO_TEST, + .filter = no_timenamespace, + }, + { + .name = "exit signal (SIGCHLD) in flags", + .flags = SIGCHLD, + .size = 0, + .expected = -EINVAL, + .test_mode = CLONE3_ARGS_NO_TEST, + }, +}; - test_clone3(0, sizeof(struct clone_args) * 2, -E2BIG, - CLONE3_ARGS_ALL_0); +int main(int argc, char *argv[]) +{ + size_t size; + int i; - /* Do a clone3() with > page size */ - test_clone3(0, getpagesize() + 8, -E2BIG, CLONE3_ARGS_NO_TEST); + ksft_print_header(); + ksft_set_plan(ARRAY_SIZE(tests)); + test_clone3_supported(); - /* Do a clone3() with CLONE3_ARGS_SIZE_V0 in a new PID NS. */ - if (uid == 0) - test_clone3(CLONE_NEWPID, CLONE3_ARGS_SIZE_V0, 0, - CLONE3_ARGS_NO_TEST); - else - ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { + if (tests[i].filter && tests[i].filter()) { + ksft_test_result_skip("%s\n", tests[i].name); + continue; + } - /* Do a clone3() with CLONE3_ARGS_SIZE_V0 - 8 in a new PID NS */ - test_clone3(CLONE_NEWPID, CLONE3_ARGS_SIZE_V0 - 8, -EINVAL, - CLONE3_ARGS_NO_TEST); + if (tests[i].size_function) + size = tests[i].size_function(); + else + size = tests[i].size; - /* Do a clone3() with sizeof(struct clone_args) + 8 in a new PID NS */ - if (uid == 0) - test_clone3(CLONE_NEWPID, sizeof(struct clone_args) + 8, 0, - CLONE3_ARGS_NO_TEST); - else - ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n"); + ksft_print_msg("Running test '%s'\n", tests[i].name); - /* Do a clone3() with > page size in a new PID NS */ - test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG, - CLONE3_ARGS_NO_TEST); + ksft_test_result(test_clone3(tests[i].flags, size, + tests[i].expected, + tests[i].test_mode), + "%s\n", tests[i].name); + } - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail(); + ksft_finished(); } |