Em Fri, 12 Feb 2016 18:39:54 -0700 Shuah Khan <[email protected]> escreveu:
> This test opens user specified Media Device and calls > MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10 > seconds. This test is for detecting errors in device > removal path. > > Usage: > sudo ./media_devkref_test -d /dev/mediaX > > While test is running, remove the device and > ensure there are no use after free errors and > other Oops in the dmesg. Enable KaSan kernel > config option for use-after-free error detection. > > Signed-off-by: Shuah Khan <[email protected]> Looks good to me. Reviewed-by: Mauro Carvalho Chehab <[email protected]> > --- > tools/testing/selftests/media_tests/.gitignore | 1 + > tools/testing/selftests/media_tests/Makefile | 7 ++ > .../selftests/media_tests/media_device_test.c | 94 > ++++++++++++++++++++++ > 3 files changed, 102 insertions(+) > create mode 100644 tools/testing/selftests/media_tests/.gitignore > create mode 100644 tools/testing/selftests/media_tests/Makefile > create mode 100644 tools/testing/selftests/media_tests/media_device_test.c > > diff --git a/tools/testing/selftests/media_tests/.gitignore > b/tools/testing/selftests/media_tests/.gitignore > new file mode 100644 > index 0000000..1c07117 > --- /dev/null > +++ b/tools/testing/selftests/media_tests/.gitignore > @@ -0,0 +1 @@ > +media_device_test > diff --git a/tools/testing/selftests/media_tests/Makefile > b/tools/testing/selftests/media_tests/Makefile > new file mode 100644 > index 0000000..7071bcc > --- /dev/null > +++ b/tools/testing/selftests/media_tests/Makefile > @@ -0,0 +1,7 @@ > +TEST_PROGS := media_device_test > +all: $(TEST_PROGS) > + > +include ../lib.mk > + > +clean: > + rm -fr media_device_test > diff --git a/tools/testing/selftests/media_tests/media_device_test.c > b/tools/testing/selftests/media_tests/media_device_test.c > new file mode 100644 > index 0000000..a47880b > --- /dev/null > +++ b/tools/testing/selftests/media_tests/media_device_test.c > @@ -0,0 +1,94 @@ > +/* > + * media_devkref_test.c - Media Controller Device Kref API Test > + * > + * Copyright (c) 2016 Shuah Khan <[email protected]> > + * Copyright (c) 2016 Samsung Electronics Co., Ltd. > + * > + * This file is released under the GPLv2. > + */ > + > +/* > + * This file adds a test for Media Controller API. > + * This test should be run as root and should not be > + * included in the Kselftest run. This test should be > + * run when hardware and driver that makes use Media > + * Controller API are present in the system. > + * > + * This test opens user specified Media Device and calls > + * MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10 > + * seconds. > + * > + * Usage: > + * sudo ./media_devkref_test -d /dev/mediaX > + * > + * While test is running, remove the device and > + * ensure there are no use after free errors and > + * other Oops in the dmesg. Enable KaSan kernel > + * config option for use-after-free error detection. > +*/ > + > +#include <stdio.h> > +#include <unistd.h> > +#include <stdlib.h> > +#include <errno.h> > +#include <string.h> > +#include <fcntl.h> > +#include <sys/ioctl.h> > +#include <sys/stat.h> > +#include <linux/media.h> > + > +int main(int argc, char **argv) > +{ > + int opt; > + char media_device[256]; > + int count = 0; > + struct media_device_info mdi; > + int ret; > + int fd; > + > + if (argc < 2) { > + printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); > + exit(-1); > + } > + > + /* Process arguments */ > + while ((opt = getopt(argc, argv, "d:")) != -1) { > + switch (opt) { > + case 'd': > + strncpy(media_device, optarg, sizeof(media_device) - 1); > + media_device[sizeof(media_device)-1] = '\0'; > + break; > + default: > + printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); > + exit(-1); > + } > + } > + > + if (getuid() != 0) { > + printf("Please run the test as root - Exiting.\n"); > + exit(-1); > + } > + > + /* Open Media device and keep it open */ > + fd = open(media_device, O_RDWR); > + if (fd == -1) { > + printf("Media Device open errno %s\n", strerror(errno)); > + exit(-1); > + } > + > + printf("\nNote:\n" > + "While test is running, remove the device and\n" > + "ensure there are no use after free errors and\n" > + "other Oops in the dmesg. Enable KaSan kernel\n" > + "config option for use-after-free error detection.\n\n"); > + > + while (count < 100) { > + ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); > + if (ret < 0) > + printf("Media Device Info errno %s\n", strerror(errno)); > + printf("Media device model %s driver %s\n", > + mdi.model, mdi.driver); > + sleep(10); > + count++; > + } > +} -- Thanks, Mauro
