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103 lines
2.5 KiB
103 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* media_device_test.c - Media Controller Device ioctl loop Test |
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* |
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* Copyright (c) 2016 Shuah Khan <[email protected]> |
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* Copyright (c) 2016 Samsung Electronics Co., Ltd. |
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* |
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*/ |
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/* |
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* This file adds a test for Media Controller API. |
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* This test should be run as root and should not be |
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* included in the Kselftest run. This test should be |
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* run when hardware and driver that makes use Media |
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* Controller API are present in the system. |
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* |
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* This test opens user specified Media Device and calls |
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* MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10 |
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* seconds. |
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* |
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* Usage: |
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* sudo ./media_device_test -d /dev/mediaX |
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* |
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* While test is running, remove the device and |
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* ensure there are no use after free errors and |
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* other Oops in the dmesg. Enable KaSan kernel |
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* config option for use-after-free error detection. |
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*/ |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <fcntl.h> |
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#include <sys/ioctl.h> |
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#include <sys/stat.h> |
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#include <time.h> |
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#include <linux/media.h> |
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#include "../kselftest.h" |
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int main(int argc, char **argv) |
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{ |
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int opt; |
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char media_device[256]; |
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int count; |
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struct media_device_info mdi; |
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int ret; |
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int fd; |
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if (argc < 2) { |
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printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); |
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exit(-1); |
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} |
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/* Process arguments */ |
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while ((opt = getopt(argc, argv, "d:")) != -1) { |
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switch (opt) { |
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case 'd': |
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strncpy(media_device, optarg, sizeof(media_device) - 1); |
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media_device[sizeof(media_device)-1] = '\0'; |
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break; |
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default: |
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printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); |
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exit(-1); |
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} |
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} |
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if (getuid() != 0) |
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ksft_exit_skip("Please run the test as root - Exiting.\n"); |
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/* Generate random number of interations */ |
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srand((unsigned int) time(NULL)); |
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count = rand(); |
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/* Open Media device and keep it open */ |
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fd = open(media_device, O_RDWR); |
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if (fd == -1) { |
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printf("Media Device open errno %s\n", strerror(errno)); |
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exit(-1); |
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} |
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printf("\nNote:\n" |
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"While test is running, remove the device and\n" |
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"ensure there are no use after free errors and\n" |
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"other Oops in the dmesg. Enable KaSan kernel\n" |
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"config option for use-after-free error detection.\n\n"); |
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printf("Running test for %d iterations\n", count); |
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while (count > 0) { |
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ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); |
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if (ret < 0) |
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printf("Media Device Info errno %s\n", strerror(errno)); |
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else |
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printf("Media device model %s driver %s - count %d\n", |
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mdi.model, mdi.driver, count); |
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sleep(10); |
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count--; |
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} |
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}
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