Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Benjamin Tissoires | 6611 | 100.00% | 20 | 100.00% |
Total | 6611 | 20 |
// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2022 Red Hat */ #include "hid.skel.h" #include "../kselftest_harness.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; unsigned int hid; int retval; int insert_head; }; struct hid_hw_request_syscall_args { __u8 data[10]; unsigned int hid; int retval; size_t size; enum hid_report_type type; __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; int hidraw_fd; int hid_id; pthread_t tid; struct hid *skel; struct bpf_link *hid_links[3]; /* max number of programs loaded in a single test */ }; static void detach_bpf(FIXTURE_DATA(hid_bpf) * self) { int i; if (self->hidraw_fd) close(self->hidraw_fd); self->hidraw_fd = 0; if (!self->skel) return; hid__detach(self->skel); for (i = 0; i < ARRAY_SIZE(self->hid_links); i++) { if (self->hid_links[i]) bpf_link__destroy(self->hid_links[i]); } hid__destroy(self->skel); self->skel = NULL; } FIXTURE_TEARDOWN(hid_bpf) { void *uhid_err; uhid_destroy(_metadata, self->uhid_fd); detach_bpf(self); pthread_join(self->tid, &uhid_err); } #define TEARDOWN_LOG(fmt, ...) do { \ TH_LOG(fmt, ##__VA_ARGS__); \ hid_bpf_teardown(_metadata, self, variant); \ } while (0) FIXTURE_SETUP(hid_bpf) { time_t t; int err; /* initialize random number generator */ srand((unsigned int)time(&t)); self->dev_id = rand() % 1024; self->uhid_fd = setup_uhid(_metadata, self->dev_id); /* locate the uev, self, variant);ent file of the created device */ self->hid_id = get_hid_id(self->dev_id); ASSERT_GT(self->hid_id, 0) TEARDOWN_LOG("Could not locate uhid device id: %d", self->hid_id); err = uhid_start_listener(_metadata, &self->tid, self->uhid_fd); ASSERT_EQ(0, err) TEARDOWN_LOG("could not start udev listener: %d", err); } struct test_program { const char *name; int insert_head; }; #define LOAD_PROGRAMS(progs) \ load_programs(progs, ARRAY_SIZE(progs), _metadata, self, variant) #define LOAD_BPF \ load_programs(NULL, 0, _metadata, self, variant) static void load_programs(const struct test_program programs[], const size_t progs_count, struct __test_metadata *_metadata, FIXTURE_DATA(hid_bpf) * self, const FIXTURE_VARIANT(hid_bpf) * variant) { struct bpf_map *iter_map; int err = -EINVAL; ASSERT_LE(progs_count, ARRAY_SIZE(self->hid_links)) TH_LOG("too many programs are to be loaded"); /* open the bpf file */ self->skel = hid__open(); ASSERT_OK_PTR(self->skel) TEARDOWN_LOG("Error while calling hid__open"); for (int i = 0; i < progs_count; i++) { struct bpf_program *prog; struct bpf_map *map; int *ops_hid_id; prog = bpf_object__find_program_by_name(*self->skel->skeleton->obj, programs[i].name); ASSERT_OK_PTR(prog) TH_LOG("can not find program by name '%s'", programs[i].name); bpf_program__set_autoload(prog, true); map = bpf_object__find_map_by_name(*self->skel->skeleton->obj, programs[i].name + 4); ASSERT_OK_PTR(map) TH_LOG("can not find struct_ops by name '%s'", programs[i].name + 4); /* hid_id is the first field of struct hid_bpf_ops */ ops_hid_id = bpf_map__initial_value(map, NULL); ASSERT_OK_PTR(ops_hid_id) TH_LOG("unable to retrieve struct_ops data"); *ops_hid_id = self->hid_id; } /* we disable the auto-attach feature of all maps because we * only want the tested one to be manually attached in the next * call to bpf_map__attach_struct_ops() */ bpf_object__for_each_map(iter_map, *self->skel->skeleton->obj) bpf_map__set_autoattach(iter_map, false); err = hid__load(self->skel); ASSERT_OK(err) TH_LOG("hid_skel_load failed: %d", err); for (int i = 0; i < progs_count; i++) { struct bpf_map *map; map = bpf_object__find_map_by_name(*self->skel->skeleton->obj, programs[i].name + 4); ASSERT_OK_PTR(map) TH_LOG("can not find struct_ops by name '%s'", programs[i].name + 4); self->hid_links[i] = bpf_map__attach_struct_ops(map); ASSERT_OK_PTR(self->hid_links[i]) TH_LOG("failed to attach struct ops '%s'", programs[i].name + 4); } hid__attach(self->skel); self->hidraw_fd = open_hidraw(self->dev_id); ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); } /* * A simple test to see if the fixture is working fine. * If this fails, none of the other tests will pass. */ TEST_F(hid_bpf, test_create_uhid) { } /* * Attach hid_first_event to the given uhid device, * retrieve and open the matching hidraw node, * inject one event in the uhid device, * check that the program sees it and can change the data */ TEST_F(hid_bpf, raw_event) { const struct test_program progs[] = { { .name = "hid_first_event" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* check that the program is correctly loaded */ ASSERT_EQ(self->skel->data->callback_check, 52) TH_LOG("callback_check1"); ASSERT_EQ(self->skel->data->callback2_check, 52) TH_LOG("callback2_check1"); /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* check that hid_first_event() was executed */ ASSERT_EQ(self->skel->data->callback_check, 42) TH_LOG("callback_check1"); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[2], 47); /* inject another event */ memset(buf, 0, sizeof(buf)); buf[0] = 1; buf[1] = 47; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* check that hid_first_event() was executed */ ASSERT_EQ(self->skel->data->callback_check, 47) TH_LOG("callback_check1"); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[2], 52); } /* * Attach hid_first_event to the given uhid device, * retrieve and open the matching hidraw node, * inject one event in the uhid device, * check that the program sees it and can change the data */ TEST_F(hid_bpf, subprog_raw_event) { const struct test_program progs[] = { { .name = "hid_subprog_first_event" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[2], 47); /* inject another event */ memset(buf, 0, sizeof(buf)); buf[0] = 1; buf[1] = 47; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[2], 52); } /* * Attach hid_first_event to the given uhid device, * attempt at re-attaching it, we should not lock and * return an invalid struct bpf_link */ TEST_F(hid_bpf, multiple_attach) { const struct test_program progs[] = { { .name = "hid_first_event" }, }; struct bpf_link *link; LOAD_PROGRAMS(progs); link = bpf_map__attach_struct_ops(self->skel->maps.first_event); ASSERT_NULL(link) TH_LOG("unexpected return value when re-attaching the struct_ops"); } /* * Ensures that we can attach/detach programs */ TEST_F(hid_bpf, test_attach_detach) { const struct test_program progs[] = { { .name = "hid_first_event" }, { .name = "hid_second_event" }, }; struct bpf_link *link; __u8 buf[10] = {0}; int err, link_fd; LOAD_PROGRAMS(progs); link = self->hid_links[0]; ASSERT_OK_PTR(link) TH_LOG("HID-BPF link not created"); link_fd = bpf_link__fd(link); ASSERT_GE(link_fd, 0) TH_LOG("HID-BPF link FD not valid"); /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[2], 47); /* make sure both programs are run */ ASSERT_EQ(buf[3], 52); /* pin the first program and immediately unpin it */ #define PIN_PATH "/sys/fs/bpf/hid_first_event" err = bpf_obj_pin(link_fd, PIN_PATH); ASSERT_OK(err) TH_LOG("error while calling bpf_obj_pin"); remove(PIN_PATH); #undef PIN_PATH usleep(100000); /* detach the program */ detach_bpf(self); self->hidraw_fd = open_hidraw(self->dev_id); ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); /* inject another event */ memset(buf, 0, sizeof(buf)); buf[0] = 1; buf[1] = 47; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw_no_bpf"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 47); ASSERT_EQ(buf[2], 0); ASSERT_EQ(buf[3], 0); /* re-attach our program */ LOAD_PROGRAMS(progs); /* inject one event */ memset(buf, 0, sizeof(buf)); buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[2], 47); ASSERT_EQ(buf[3], 52); } /* * Attach hid_change_report_id to the given uhid device, * retrieve and open the matching hidraw node, * inject one event in the uhid device, * check that the program sees it and can change the data */ TEST_F(hid_bpf, test_hid_change_report) { const struct test_program progs[] = { { .name = "hid_change_report_id" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 2); ASSERT_EQ(buf[1], 42); ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); } /* * Call hid_bpf_input_report against the given uhid device, * check that the program is called and does the expected. */ TEST_F(hid_bpf, test_hid_user_input_report_call) { struct hid_hw_request_syscall_args args = { .retval = -1, .size = 10, }; DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, .ctx_in = &args, .ctx_size_in = sizeof(args), ); __u8 buf[10] = {0}; int err, prog_fd; LOAD_BPF; args.hid = self->hid_id; args.data[0] = 1; /* report ID */ args.data[1] = 2; /* report ID */ args.data[2] = 42; /* report ID */ prog_fd = bpf_program__fd(self->skel->progs.hid_user_input_report); /* check that there is no data to read from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, -1) TH_LOG("read_hidraw"); err = bpf_prog_test_run_opts(prog_fd, &tattrs); ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); ASSERT_EQ(args.retval, 0); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 2); ASSERT_EQ(buf[2], 42); } /* * Call hid_bpf_hw_output_report against the given uhid device, * check that the program is called and does the expected. */ TEST_F(hid_bpf, test_hid_user_output_report_call) { struct hid_hw_request_syscall_args args = { .retval = -1, .size = 10, }; DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, .ctx_in = &args, .ctx_size_in = sizeof(args), ); int err, cond_err, prog_fd; struct timespec time_to_wait; LOAD_BPF; args.hid = self->hid_id; args.data[0] = 1; /* report ID */ args.data[1] = 2; /* report ID */ args.data[2] = 42; /* report ID */ prog_fd = bpf_program__fd(self->skel->progs.hid_user_output_report); pthread_mutex_lock(&uhid_output_mtx); memset(output_report, 0, sizeof(output_report)); clock_gettime(CLOCK_REALTIME, &time_to_wait); time_to_wait.tv_sec += 2; err = bpf_prog_test_run_opts(prog_fd, &tattrs); cond_err = pthread_cond_timedwait(&uhid_output_cond, &uhid_output_mtx, &time_to_wait); ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); ASSERT_OK(cond_err) TH_LOG("error while calling waiting for the condition"); ASSERT_EQ(args.retval, 3); ASSERT_EQ(output_report[0], 1); ASSERT_EQ(output_report[1], 2); ASSERT_EQ(output_report[2], 42); pthread_mutex_unlock(&uhid_output_mtx); } /* * Call hid_hw_raw_request against the given uhid device, * check that the program is called and does the expected. */ TEST_F(hid_bpf, test_hid_user_raw_request_call) { struct hid_hw_request_syscall_args args = { .retval = -1, .type = HID_FEATURE_REPORT, .request_type = HID_REQ_GET_REPORT, .size = 10, }; DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, .ctx_in = &args, .ctx_size_in = sizeof(args), ); int err, prog_fd; LOAD_BPF; args.hid = self->hid_id; args.data[0] = 1; /* report ID */ prog_fd = bpf_program__fd(self->skel->progs.hid_user_raw_request); err = bpf_prog_test_run_opts(prog_fd, &tattrs); ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); ASSERT_EQ(args.retval, 2); ASSERT_EQ(args.data[1], 2); } /* * Call hid_hw_raw_request against the given uhid device, * check that the program is called and prevents the * call to uhid. */ TEST_F(hid_bpf, test_hid_filter_raw_request_call) { const struct test_program progs[] = { { .name = "hid_test_filter_raw_request" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* first check that we did not attach to device_event */ /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 42); ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); /* now check that our program is preventing hid_hw_raw_request() */ /* emit hid_hw_raw_request from hidraw */ /* Get Feature */ memset(buf, 0, sizeof(buf)); buf[0] = 0x1; /* Report Number */ err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); ASSERT_LT(err, 0) TH_LOG("unexpected success while reading HIDIOCGFEATURE: %d", err); ASSERT_EQ(errno, 20) TH_LOG("unexpected error code while reading HIDIOCGFEATURE: %d", errno); /* remove our bpf program and check that we can now emit commands */ /* detach the program */ detach_bpf(self); self->hidraw_fd = open_hidraw(self->dev_id); ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); ASSERT_GE(err, 0) TH_LOG("error while reading HIDIOCGFEATURE: %d", err); } /* * Call hid_hw_raw_request against the given uhid device, * check that the program is called and can issue the call * to uhid and transform the answer. */ TEST_F(hid_bpf, test_hid_change_raw_request_call) { const struct test_program progs[] = { { .name = "hid_test_hidraw_raw_request" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* emit hid_hw_raw_request from hidraw */ /* Get Feature */ memset(buf, 0, sizeof(buf)); buf[0] = 0x1; /* Report Number */ err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); ASSERT_EQ(err, 3) TH_LOG("unexpected returned size while reading HIDIOCGFEATURE: %d", err); ASSERT_EQ(buf[0], 2); ASSERT_EQ(buf[1], 3); ASSERT_EQ(buf[2], 4); } /* * Call hid_hw_raw_request against the given uhid device, * check that the program is not making infinite loops. */ TEST_F(hid_bpf, test_hid_infinite_loop_raw_request_call) { const struct test_program progs[] = { { .name = "hid_test_infinite_loop_raw_request" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* emit hid_hw_raw_request from hidraw */ /* Get Feature */ memset(buf, 0, sizeof(buf)); buf[0] = 0x1; /* Report Number */ err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); ASSERT_EQ(err, 3) TH_LOG("unexpected returned size while reading HIDIOCGFEATURE: %d", err); } /* * Call hid_hw_output_report against the given uhid device, * check that the program is called and prevents the * call to uhid. */ TEST_F(hid_bpf, test_hid_filter_output_report_call) { const struct test_program progs[] = { { .name = "hid_test_filter_output_report" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* first check that we did not attach to device_event */ /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 42); ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); /* now check that our program is preventing hid_hw_output_report() */ buf[0] = 1; /* report ID */ buf[1] = 2; buf[2] = 42; err = write(self->hidraw_fd, buf, 3); ASSERT_LT(err, 0) TH_LOG("unexpected success while sending hid_hw_output_report: %d", err); ASSERT_EQ(errno, 25) TH_LOG("unexpected error code while sending hid_hw_output_report: %d", errno); /* remove our bpf program and check that we can now emit commands */ /* detach the program */ detach_bpf(self); self->hidraw_fd = open_hidraw(self->dev_id); ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); err = write(self->hidraw_fd, buf, 3); ASSERT_GE(err, 0) TH_LOG("error while sending hid_hw_output_report: %d", err); } /* * Call hid_hw_output_report against the given uhid device, * check that the program is called and can issue the call * to uhid and transform the answer. */ TEST_F(hid_bpf, test_hid_change_output_report_call) { const struct test_program progs[] = { { .name = "hid_test_hidraw_output_report" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* emit hid_hw_output_report from hidraw */ buf[0] = 1; /* report ID */ buf[1] = 2; buf[2] = 42; err = write(self->hidraw_fd, buf, 10); ASSERT_EQ(err, 2) TH_LOG("unexpected returned size while sending hid_hw_output_report: %d", err); } /* * Call hid_hw_output_report against the given uhid device, * check that the program is not making infinite loops. */ TEST_F(hid_bpf, test_hid_infinite_loop_output_report_call) { const struct test_program progs[] = { { .name = "hid_test_infinite_loop_output_report" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* emit hid_hw_output_report from hidraw */ buf[0] = 1; /* report ID */ buf[1] = 2; buf[2] = 42; err = write(self->hidraw_fd, buf, 8); ASSERT_EQ(err, 2) TH_LOG("unexpected returned size while sending hid_hw_output_report: %d", err); } /* * Attach hid_multiply_event_wq to the given uhid device, * retrieve and open the matching hidraw node, * inject one event in the uhid device, * check that the program sees it and can add extra data */ TEST_F(hid_bpf, test_multiply_events_wq) { const struct test_program progs[] = { { .name = "hid_test_multiply_events_wq" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 47); usleep(100000); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 2); ASSERT_EQ(buf[1], 3); } /* * Attach hid_multiply_event to the given uhid device, * retrieve and open the matching hidraw node, * inject one event in the uhid device, * check that the program sees it and can add extra data */ TEST_F(hid_bpf, test_multiply_events) { const struct test_program progs[] = { { .name = "hid_test_multiply_events" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* inject one event */ buf[0] = 1; buf[1] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 2); ASSERT_EQ(buf[1], 47); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 2); ASSERT_EQ(buf[1], 52); } /* * Call hid_bpf_input_report against the given uhid device, * check that the program is not making infinite loops. */ TEST_F(hid_bpf, test_hid_infinite_loop_input_report_call) { const struct test_program progs[] = { { .name = "hid_test_infinite_loop_input_report" }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* emit hid_hw_output_report from hidraw */ buf[0] = 1; /* report ID */ buf[1] = 2; buf[2] = 42; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 3); /* read the data from hidraw: hid_bpf_try_input_report should work exactly one time */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[0], 1); ASSERT_EQ(buf[1], 4); /* read the data from hidraw: there should be none */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, -1) TH_LOG("read_hidraw"); } /* * Attach hid_insert{0,1,2} to the given uhid device, * retrieve and open the matching hidraw node, * inject one event in the uhid device, * check that the programs have been inserted in the correct order. */ TEST_F(hid_bpf, test_hid_attach_flags) { const struct test_program progs[] = { { .name = "hid_test_insert2", .insert_head = 0, }, { .name = "hid_test_insert1", .insert_head = 1, }, { .name = "hid_test_insert3", .insert_head = 0, }, }; __u8 buf[10] = {0}; int err; LOAD_PROGRAMS(progs); /* inject one event */ buf[0] = 1; uhid_send_event(_metadata, self->uhid_fd, buf, 6); /* read the data from hidraw */ memset(buf, 0, sizeof(buf)); err = read(self->hidraw_fd, buf, sizeof(buf)); ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); ASSERT_EQ(buf[1], 1); ASSERT_EQ(buf[2], 2); ASSERT_EQ(buf[3], 3); } /* * Attach hid_rdesc_fixup to the given uhid device, * retrieve and open the matching hidraw node, * check that the hidraw report descriptor has been updated. */ TEST_F(hid_bpf, test_rdesc_fixup) { struct hidraw_report_descriptor rpt_desc = {0}; const struct test_program progs[] = { { .name = "hid_rdesc_fixup" }, }; int err, desc_size; LOAD_PROGRAMS(progs); /* check that hid_rdesc_fixup() was executed */ ASSERT_EQ(self->skel->data->callback2_check, 0x21); /* read the exposed report descriptor from hidraw */ err = ioctl(self->hidraw_fd, HIDIOCGRDESCSIZE, &desc_size); ASSERT_GE(err, 0) TH_LOG("error while reading HIDIOCGRDESCSIZE: %d", err); /* ensure the new size of the rdesc is bigger than the old one */ ASSERT_GT(desc_size, sizeof(rdesc)); rpt_desc.size = desc_size; err = ioctl(self->hidraw_fd, HIDIOCGRDESC, &rpt_desc); ASSERT_GE(err, 0) TH_LOG("error while reading HIDIOCGRDESC: %d", err); ASSERT_EQ(rpt_desc.value[4], 0x42); } static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args) { char buf[1024]; if (level == LIBBPF_DEBUG) return 0; snprintf(buf, sizeof(buf), "# %s", format); vfprintf(stdout, buf, args); 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 */ libbpf_set_strict_mode(LIBBPF_STRICT_ALL); libbpf_set_print(libbpf_print_fn); return test_harness_run(argc, argv); }
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