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| 1 | +// SPDX-License-Identifier: GPL-2.0 |
| 2 | +#define _GNU_SOURCE |
| 3 | +#include <errno.h> |
| 4 | +#include <fcntl.h> |
| 5 | +#include <sched.h> |
| 6 | +#include <stdio.h> |
| 7 | +#include <stdbool.h> |
| 8 | +#include <sys/stat.h> |
| 9 | +#include <sys/syscall.h> |
| 10 | +#include <sys/types.h> |
| 11 | +#include <sys/wait.h> |
| 12 | +#include <time.h> |
| 13 | +#include <unistd.h> |
| 14 | +#include <string.h> |
| 15 | +#include <pthread.h> |
| 16 | + |
| 17 | +#include "log.h" |
| 18 | +#include "timens.h" |
| 19 | + |
| 20 | +#define OFFSET (36000) |
| 21 | + |
| 22 | +struct thread_args { |
| 23 | + char *tst_name; |
| 24 | + struct timespec *now; |
| 25 | +}; |
| 26 | + |
| 27 | +static void *tcheck(void *_args) |
| 28 | +{ |
| 29 | + struct thread_args *args = _args; |
| 30 | + struct timespec *now = args->now, tst; |
| 31 | + int i; |
| 32 | + |
| 33 | + for (i = 0; i < 2; i++) { |
| 34 | + _gettime(CLOCK_MONOTONIC, &tst, i); |
| 35 | + if (abs(tst.tv_sec - now->tv_sec) > 5) { |
| 36 | + pr_fail("%s: in-thread: unexpected value: %ld (%ld)\n", |
| 37 | + args->tst_name, tst.tv_sec, now->tv_sec); |
| 38 | + return (void *)1UL; |
| 39 | + } |
| 40 | + } |
| 41 | + return NULL; |
| 42 | +} |
| 43 | + |
| 44 | +static int check_in_thread(char *tst_name, struct timespec *now) |
| 45 | +{ |
| 46 | + struct thread_args args = { |
| 47 | + .tst_name = tst_name, |
| 48 | + .now = now, |
| 49 | + }; |
| 50 | + pthread_t th; |
| 51 | + void *retval; |
| 52 | + |
| 53 | + if (pthread_create(&th, NULL, tcheck, &args)) |
| 54 | + return pr_perror("thread"); |
| 55 | + if (pthread_join(th, &retval)) |
| 56 | + return pr_perror("pthread_join"); |
| 57 | + return !(retval == NULL); |
| 58 | +} |
| 59 | + |
| 60 | +static int check(char *tst_name, struct timespec *now) |
| 61 | +{ |
| 62 | + struct timespec tst; |
| 63 | + int i; |
| 64 | + |
| 65 | + for (i = 0; i < 2; i++) { |
| 66 | + _gettime(CLOCK_MONOTONIC, &tst, i); |
| 67 | + if (abs(tst.tv_sec - now->tv_sec) > 5) |
| 68 | + return pr_fail("%s: unexpected value: %ld (%ld)\n", |
| 69 | + tst_name, tst.tv_sec, now->tv_sec); |
| 70 | + } |
| 71 | + if (check_in_thread(tst_name, now)) |
| 72 | + return 1; |
| 73 | + ksft_test_result_pass("%s\n", tst_name); |
| 74 | + return 0; |
| 75 | +} |
| 76 | + |
| 77 | +int main(int argc, char *argv[]) |
| 78 | +{ |
| 79 | + struct timespec now; |
| 80 | + int status; |
| 81 | + pid_t pid; |
| 82 | + |
| 83 | + if (argc > 1) { |
| 84 | + char *endptr; |
| 85 | + |
| 86 | + ksft_cnt.ksft_pass = 1; |
| 87 | + now.tv_sec = strtoul(argv[1], &endptr, 0); |
| 88 | + if (*endptr != 0) |
| 89 | + return pr_perror("strtoul"); |
| 90 | + |
| 91 | + return check("child after exec", &now); |
| 92 | + } |
| 93 | + |
| 94 | + nscheck(); |
| 95 | + |
| 96 | + ksft_set_plan(4); |
| 97 | + |
| 98 | + clock_gettime(CLOCK_MONOTONIC, &now); |
| 99 | + |
| 100 | + if (unshare_timens()) |
| 101 | + return 1; |
| 102 | + |
| 103 | + if (_settime(CLOCK_MONOTONIC, OFFSET)) |
| 104 | + return 1; |
| 105 | + |
| 106 | + if (check("parent before vfork", &now)) |
| 107 | + return 1; |
| 108 | + |
| 109 | + pid = vfork(); |
| 110 | + if (pid < 0) |
| 111 | + return pr_perror("fork"); |
| 112 | + |
| 113 | + if (pid == 0) { |
| 114 | + char now_str[64]; |
| 115 | + char *cargv[] = {"exec", now_str, NULL}; |
| 116 | + char *cenv[] = {NULL}; |
| 117 | + |
| 118 | + /* Check for proper vvar offsets after execve. */ |
| 119 | + snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET); |
| 120 | + execve("/proc/self/exe", cargv, cenv); |
| 121 | + pr_perror("execve"); |
| 122 | + _exit(1); |
| 123 | + } |
| 124 | + |
| 125 | + if (waitpid(pid, &status, 0) != pid) |
| 126 | + return pr_perror("waitpid"); |
| 127 | + |
| 128 | + if (status) |
| 129 | + ksft_exit_fail(); |
| 130 | + ksft_inc_pass_cnt(); |
| 131 | + ksft_test_result_pass("wait for child\n"); |
| 132 | + |
| 133 | + /* Check that we are still in the source timens. */ |
| 134 | + if (check("parent after vfork", &now)) |
| 135 | + return 1; |
| 136 | + |
| 137 | + ksft_exit_pass(); |
| 138 | + return 0; |
| 139 | +} |
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