aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/tools/testing/selftests/hid/hid_bpf.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/hid/hid_bpf.c')
-rw-r--r--tools/testing/selftests/hid/hid_bpf.c443
1 files changed, 2 insertions, 441 deletions
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index 75b7b4ef6cfa..86f4d66379f7 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -1,93 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
-/* Copyright (c) 2022 Red Hat */
+/* Copyright (c) 2022-2024 Red Hat */
#include "hid.skel.h"
-
-#include "../kselftest_harness.h"
-
+#include "hid_common.h"
#include <bpf/bpf.h>
-#include <fcntl.h>
-#include <fnmatch.h>
-#include <dirent.h>
-#include <poll.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <linux/hidraw.h>
-#include <linux/uhid.h>
-
-#define SHOW_UHID_DEBUG 0
-
-#define min(a, b) \
- ({ __typeof__(a) _a = (a); \
- __typeof__(b) _b = (b); \
- _a < _b ? _a : _b; })
-
-static unsigned char rdesc[] = {
- 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
- 0x09, 0x21, /* Usage (Vendor Usage 0x21) */
- 0xa1, 0x01, /* COLLECTION (Application) */
- 0x09, 0x01, /* Usage (Vendor Usage 0x01) */
- 0xa1, 0x00, /* COLLECTION (Physical) */
- 0x85, 0x02, /* REPORT_ID (2) */
- 0x19, 0x01, /* USAGE_MINIMUM (1) */
- 0x29, 0x08, /* USAGE_MAXIMUM (3) */
- 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
- 0x25, 0xff, /* LOGICAL_MAXIMUM (255) */
- 0x95, 0x08, /* REPORT_COUNT (8) */
- 0x75, 0x08, /* REPORT_SIZE (8) */
- 0x81, 0x02, /* INPUT (Data,Var,Abs) */
- 0xc0, /* END_COLLECTION */
- 0x09, 0x01, /* Usage (Vendor Usage 0x01) */
- 0xa1, 0x00, /* COLLECTION (Physical) */
- 0x85, 0x01, /* REPORT_ID (1) */
- 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
- 0x19, 0x01, /* USAGE_MINIMUM (1) */
- 0x29, 0x03, /* USAGE_MAXIMUM (3) */
- 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
- 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
- 0x95, 0x03, /* REPORT_COUNT (3) */
- 0x75, 0x01, /* REPORT_SIZE (1) */
- 0x81, 0x02, /* INPUT (Data,Var,Abs) */
- 0x95, 0x01, /* REPORT_COUNT (1) */
- 0x75, 0x05, /* REPORT_SIZE (5) */
- 0x81, 0x01, /* INPUT (Cnst,Var,Abs) */
- 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
- 0x09, 0x30, /* USAGE (X) */
- 0x09, 0x31, /* USAGE (Y) */
- 0x15, 0x81, /* LOGICAL_MINIMUM (-127) */
- 0x25, 0x7f, /* LOGICAL_MAXIMUM (127) */
- 0x75, 0x10, /* REPORT_SIZE (16) */
- 0x95, 0x02, /* REPORT_COUNT (2) */
- 0x81, 0x06, /* INPUT (Data,Var,Rel) */
-
- 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
- 0x19, 0x01, /* USAGE_MINIMUM (1) */
- 0x29, 0x03, /* USAGE_MAXIMUM (3) */
- 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
- 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
- 0x95, 0x03, /* REPORT_COUNT (3) */
- 0x75, 0x01, /* REPORT_SIZE (1) */
- 0x91, 0x02, /* Output (Data,Var,Abs) */
- 0x95, 0x01, /* REPORT_COUNT (1) */
- 0x75, 0x05, /* REPORT_SIZE (5) */
- 0x91, 0x01, /* Output (Cnst,Var,Abs) */
-
- 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
- 0x19, 0x06, /* USAGE_MINIMUM (6) */
- 0x29, 0x08, /* USAGE_MAXIMUM (8) */
- 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
- 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
- 0x95, 0x03, /* REPORT_COUNT (3) */
- 0x75, 0x01, /* REPORT_SIZE (1) */
- 0xb1, 0x02, /* Feature (Data,Var,Abs) */
- 0x95, 0x01, /* REPORT_COUNT (1) */
- 0x75, 0x05, /* REPORT_SIZE (5) */
- 0x91, 0x01, /* Output (Cnst,Var,Abs) */
-
- 0xc0, /* END_COLLECTION */
- 0xc0, /* END_COLLECTION */
-};
-
-static __u8 feature_data[] = { 1, 2 };
struct attach_prog_args {
int prog_fd;
@@ -105,354 +20,6 @@ struct hid_hw_request_syscall_args {
__u8 request_type;
};
-#define ASSERT_OK(data) ASSERT_FALSE(data)
-#define ASSERT_OK_PTR(ptr) ASSERT_NE(NULL, ptr)
-
-#define UHID_LOG(fmt, ...) do { \
- if (SHOW_UHID_DEBUG) \
- TH_LOG(fmt, ##__VA_ARGS__); \
-} while (0)
-
-static pthread_mutex_t uhid_started_mtx = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t uhid_started = PTHREAD_COND_INITIALIZER;
-
-static pthread_mutex_t uhid_output_mtx = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t uhid_output_cond = PTHREAD_COND_INITIALIZER;
-static unsigned char output_report[10];
-
-/* no need to protect uhid_stopped, only one thread accesses it */
-static bool uhid_stopped;
-
-static int uhid_write(struct __test_metadata *_metadata, int fd, const struct uhid_event *ev)
-{
- ssize_t ret;
-
- ret = write(fd, ev, sizeof(*ev));
- if (ret < 0) {
- TH_LOG("Cannot write to uhid: %m");
- return -errno;
- } else if (ret != sizeof(*ev)) {
- TH_LOG("Wrong size written to uhid: %zd != %zu",
- ret, sizeof(ev));
- return -EFAULT;
- } else {
- return 0;
- }
-}
-
-static int uhid_create(struct __test_metadata *_metadata, int fd, int rand_nb)
-{
- struct uhid_event ev;
- char buf[25];
-
- sprintf(buf, "test-uhid-device-%d", rand_nb);
-
- memset(&ev, 0, sizeof(ev));
- ev.type = UHID_CREATE;
- strcpy((char *)ev.u.create.name, buf);
- ev.u.create.rd_data = rdesc;
- ev.u.create.rd_size = sizeof(rdesc);
- ev.u.create.bus = BUS_USB;
- ev.u.create.vendor = 0x0001;
- ev.u.create.product = 0x0a37;
- ev.u.create.version = 0;
- ev.u.create.country = 0;
-
- sprintf(buf, "%d", rand_nb);
- strcpy((char *)ev.u.create.phys, buf);
-
- return uhid_write(_metadata, fd, &ev);
-}
-
-static void uhid_destroy(struct __test_metadata *_metadata, int fd)
-{
- struct uhid_event ev;
-
- memset(&ev, 0, sizeof(ev));
- ev.type = UHID_DESTROY;
-
- uhid_write(_metadata, fd, &ev);
-}
-
-static int uhid_event(struct __test_metadata *_metadata, int fd)
-{
- struct uhid_event ev, answer;
- ssize_t ret;
-
- memset(&ev, 0, sizeof(ev));
- ret = read(fd, &ev, sizeof(ev));
- if (ret == 0) {
- UHID_LOG("Read HUP on uhid-cdev");
- return -EFAULT;
- } else if (ret < 0) {
- UHID_LOG("Cannot read uhid-cdev: %m");
- return -errno;
- } else if (ret != sizeof(ev)) {
- UHID_LOG("Invalid size read from uhid-dev: %zd != %zu",
- ret, sizeof(ev));
- return -EFAULT;
- }
-
- switch (ev.type) {
- case UHID_START:
- pthread_mutex_lock(&uhid_started_mtx);
- pthread_cond_signal(&uhid_started);
- pthread_mutex_unlock(&uhid_started_mtx);
-
- UHID_LOG("UHID_START from uhid-dev");
- break;
- case UHID_STOP:
- uhid_stopped = true;
-
- UHID_LOG("UHID_STOP from uhid-dev");
- break;
- case UHID_OPEN:
- UHID_LOG("UHID_OPEN from uhid-dev");
- break;
- case UHID_CLOSE:
- UHID_LOG("UHID_CLOSE from uhid-dev");
- break;
- case UHID_OUTPUT:
- UHID_LOG("UHID_OUTPUT from uhid-dev");
-
- pthread_mutex_lock(&uhid_output_mtx);
- memcpy(output_report,
- ev.u.output.data,
- min(ev.u.output.size, sizeof(output_report)));
- pthread_cond_signal(&uhid_output_cond);
- pthread_mutex_unlock(&uhid_output_mtx);
- break;
- case UHID_GET_REPORT:
- UHID_LOG("UHID_GET_REPORT from uhid-dev");
-
- answer.type = UHID_GET_REPORT_REPLY;
- answer.u.get_report_reply.id = ev.u.get_report.id;
- answer.u.get_report_reply.err = ev.u.get_report.rnum == 1 ? 0 : -EIO;
- answer.u.get_report_reply.size = sizeof(feature_data);
- memcpy(answer.u.get_report_reply.data, feature_data, sizeof(feature_data));
-
- uhid_write(_metadata, fd, &answer);
-
- break;
- case UHID_SET_REPORT:
- UHID_LOG("UHID_SET_REPORT from uhid-dev");
- break;
- default:
- TH_LOG("Invalid event from uhid-dev: %u", ev.type);
- }
-
- return 0;
-}
-
-struct uhid_thread_args {
- int fd;
- struct __test_metadata *_metadata;
-};
-static void *uhid_read_events_thread(void *arg)
-{
- struct uhid_thread_args *args = (struct uhid_thread_args *)arg;
- struct __test_metadata *_metadata = args->_metadata;
- struct pollfd pfds[1];
- int fd = args->fd;
- int ret = 0;
-
- pfds[0].fd = fd;
- pfds[0].events = POLLIN;
-
- uhid_stopped = false;
-
- while (!uhid_stopped) {
- ret = poll(pfds, 1, 100);
- if (ret < 0) {
- TH_LOG("Cannot poll for fds: %m");
- break;
- }
- if (pfds[0].revents & POLLIN) {
- ret = uhid_event(_metadata, fd);
- if (ret)
- break;
- }
- }
-
- return (void *)(long)ret;
-}
-
-static int uhid_start_listener(struct __test_metadata *_metadata, pthread_t *tid, int uhid_fd)
-{
- struct uhid_thread_args args = {
- .fd = uhid_fd,
- ._metadata = _metadata,
- };
- int err;
-
- pthread_mutex_lock(&uhid_started_mtx);
- err = pthread_create(tid, NULL, uhid_read_events_thread, (void *)&args);
- ASSERT_EQ(0, err) {
- TH_LOG("Could not start the uhid thread: %d", err);
- pthread_mutex_unlock(&uhid_started_mtx);
- close(uhid_fd);
- return -EIO;
- }
- pthread_cond_wait(&uhid_started, &uhid_started_mtx);
- pthread_mutex_unlock(&uhid_started_mtx);
-
- return 0;
-}
-
-static int uhid_send_event(struct __test_metadata *_metadata, int fd, __u8 *buf, size_t size)
-{
- struct uhid_event ev;
-
- if (size > sizeof(ev.u.input.data))
- return -E2BIG;
-
- memset(&ev, 0, sizeof(ev));
- ev.type = UHID_INPUT2;
- ev.u.input2.size = size;
-
- memcpy(ev.u.input2.data, buf, size);
-
- return uhid_write(_metadata, fd, &ev);
-}
-
-static int setup_uhid(struct __test_metadata *_metadata, int rand_nb)
-{
- int fd;
- const char *path = "/dev/uhid";
- int ret;
-
- fd = open(path, O_RDWR | O_CLOEXEC);
- ASSERT_GE(fd, 0) TH_LOG("open uhid-cdev failed; %d", fd);
-
- ret = uhid_create(_metadata, fd, rand_nb);
- ASSERT_EQ(0, ret) {
- TH_LOG("create uhid device failed: %d", ret);
- close(fd);
- }
-
- return fd;
-}
-
-static bool match_sysfs_device(int dev_id, const char *workdir, struct dirent *dir)
-{
- const char *target = "0003:0001:0A37.*";
- char phys[512];
- char uevent[1024];
- char temp[512];
- int fd, nread;
- bool found = false;
-
- if (fnmatch(target, dir->d_name, 0))
- return false;
-
- /* we found the correct VID/PID, now check for phys */
- sprintf(uevent, "%s/%s/uevent", workdir, dir->d_name);
-
- fd = open(uevent, O_RDONLY | O_NONBLOCK);
- if (fd < 0)
- return false;
-
- sprintf(phys, "PHYS=%d", dev_id);
-
- nread = read(fd, temp, ARRAY_SIZE(temp));
- if (nread > 0 && (strstr(temp, phys)) != NULL)
- found = true;
-
- close(fd);
-
- return found;
-}
-
-static int get_hid_id(int dev_id)
-{
- const char *workdir = "/sys/devices/virtual/misc/uhid";
- const char *str_id;
- DIR *d;
- struct dirent *dir;
- int found = -1, attempts = 3;
-
- /* it would be nice to be able to use nftw, but the no_alu32 target doesn't support it */
-
- while (found < 0 && attempts > 0) {
- attempts--;
- d = opendir(workdir);
- if (d) {
- while ((dir = readdir(d)) != NULL) {
- if (!match_sysfs_device(dev_id, workdir, dir))
- continue;
-
- str_id = dir->d_name + sizeof("0003:0001:0A37.");
- found = (int)strtol(str_id, NULL, 16);
-
- break;
- }
- closedir(d);
- }
- if (found < 0)
- usleep(100000);
- }
-
- return found;
-}
-
-static int get_hidraw(int dev_id)
-{
- const char *workdir = "/sys/devices/virtual/misc/uhid";
- char sysfs[1024];
- DIR *d, *subd;
- struct dirent *dir, *subdir;
- int i, found = -1;
-
- /* retry 5 times in case the system is loaded */
- for (i = 5; i > 0; i--) {
- usleep(10);
- d = opendir(workdir);
-
- if (!d)
- continue;
-
- while ((dir = readdir(d)) != NULL) {
- if (!match_sysfs_device(dev_id, workdir, dir))
- continue;
-
- sprintf(sysfs, "%s/%s/hidraw", workdir, dir->d_name);
-
- subd = opendir(sysfs);
- if (!subd)
- continue;
-
- while ((subdir = readdir(subd)) != NULL) {
- if (fnmatch("hidraw*", subdir->d_name, 0))
- continue;
-
- found = atoi(subdir->d_name + strlen("hidraw"));
- }
-
- closedir(subd);
-
- if (found > 0)
- break;
- }
- closedir(d);
- }
-
- return found;
-}
-
-static int open_hidraw(int dev_id)
-{
- int hidraw_number;
- char hidraw_path[64] = { 0 };
-
- hidraw_number = get_hidraw(dev_id);
- if (hidraw_number < 0)
- return hidraw_number;
-
- /* open hidraw node to check the other side of the pipe */
- sprintf(hidraw_path, "/dev/hidraw%d", hidraw_number);
- return open(hidraw_path, O_RDWR | O_NONBLOCK);
-}
-
FIXTURE(hid_bpf) {
int dev_id;
int uhid_fd;
@@ -1357,12 +924,6 @@ static int libbpf_print_fn(enum libbpf_print_level level,
return 0;
}
-static void __attribute__((constructor)) __constructor_order_last(void)
-{
- if (!__constructor_order)
- __constructor_order = _CONSTRUCTOR_ORDER_BACKWARD;
-}
-
int main(int argc, char **argv)
{
/* Use libbpf 1.0 API mode */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.