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Message-Id: <20241001-hid-bpf-hid-generic-v3-7-2ef1019468df@kernel.org>
Date: Tue, 01 Oct 2024 16:30:11 +0200
From: Benjamin Tissoires <bentiss@...nel.org>
To: Jiri Kosina <jikos@...nel.org>,
Peter Hutterer <peter.hutterer@...-t.net>, Vicki Pfau <vi@...rift.com>,
Shuah Khan <shuah@...nel.org>
Cc: linux-input@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
Benjamin Tissoires <bentiss@...nel.org>
Subject: [PATCH HID v3 7/9] selftests/hid: allow to parametrize
bus/vid/pid/rdesc on the test device
This will be useful to introduce variants in tests to test the
interactions between HID-BPF and some kernel modules.
Reviewed-by: Peter Hutterer <peter.hutterer@...-t.net>
Signed-off-by: Benjamin Tissoires <bentiss@...nel.org>
---
no changes in v3
no changes in v2
---
tools/testing/selftests/hid/hid_bpf.c | 2 +-
tools/testing/selftests/hid/hid_common.h | 46 ++++++++++++++++++++------------
tools/testing/selftests/hid/hidraw.c | 2 +-
3 files changed, 31 insertions(+), 19 deletions(-)
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index 31ff92e0debd..1e979fb3542b 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -58,7 +58,7 @@ FIXTURE_SETUP(hid_bpf)
{
int err;
- err = setup_uhid(_metadata, &self->hid);
+ err = setup_uhid(_metadata, &self->hid, BUS_USB, 0x0001, 0x0a36, rdesc, sizeof(rdesc));
ASSERT_OK(err);
}
diff --git a/tools/testing/selftests/hid/hid_common.h b/tools/testing/selftests/hid/hid_common.h
index a7d836a35bb1..f77f69c6657d 100644
--- a/tools/testing/selftests/hid/hid_common.h
+++ b/tools/testing/selftests/hid/hid_common.h
@@ -23,6 +23,9 @@ struct uhid_device {
int dev_id; /* uniq (random) number to identify the device */
int uhid_fd;
int hid_id; /* HID device id in the system */
+ __u16 bus;
+ __u32 vid;
+ __u32 pid;
pthread_t tid; /* thread for reading uhid events */
};
@@ -129,7 +132,9 @@ static int uhid_write(struct __test_metadata *_metadata, int fd, const struct uh
}
}
-static int uhid_create(struct __test_metadata *_metadata, int fd, int rand_nb)
+static int uhid_create(struct __test_metadata *_metadata, int fd, int rand_nb,
+ __u16 bus, __u32 vid, __u32 pid, __u8 *rdesc,
+ size_t rdesc_size)
{
struct uhid_event ev;
char buf[25];
@@ -140,10 +145,10 @@ static int uhid_create(struct __test_metadata *_metadata, int fd, int rand_nb)
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.rd_size = rdesc_size;
+ ev.u.create.bus = bus;
+ ev.u.create.vendor = vid;
+ ev.u.create.product = pid;
ev.u.create.version = 0;
ev.u.create.country = 0;
@@ -305,15 +310,17 @@ static int uhid_send_event(struct __test_metadata *_metadata, struct uhid_device
return uhid_write(_metadata, hid->uhid_fd, &ev);
}
-static bool match_sysfs_device(int dev_id, const char *workdir, struct dirent *dir)
+static bool match_sysfs_device(struct uhid_device *hid, const char *workdir, struct dirent *dir)
{
- const char *target = "0003:0001:0A37.*";
+ char target[20] = "";
char phys[512];
char uevent[1024];
char temp[512];
int fd, nread;
bool found = false;
+ snprintf(target, sizeof(target), "%04X:%04X:%04X.*", hid->bus, hid->vid, hid->pid);
+
if (fnmatch(target, dir->d_name, 0))
return false;
@@ -324,7 +331,7 @@ static bool match_sysfs_device(int dev_id, const char *workdir, struct dirent *d
if (fd < 0)
return false;
- sprintf(phys, "PHYS=%d", dev_id);
+ sprintf(phys, "PHYS=%d", hid->dev_id);
nread = read(fd, temp, ARRAY_SIZE(temp));
if (nread > 0 && (strstr(temp, phys)) != NULL)
@@ -335,7 +342,7 @@ static bool match_sysfs_device(int dev_id, const char *workdir, struct dirent *d
return found;
}
-static int get_hid_id(int dev_id)
+static int get_hid_id(struct uhid_device *hid)
{
const char *workdir = "/sys/devices/virtual/misc/uhid";
const char *str_id;
@@ -350,10 +357,10 @@ static int get_hid_id(int dev_id)
d = opendir(workdir);
if (d) {
while ((dir = readdir(d)) != NULL) {
- if (!match_sysfs_device(dev_id, workdir, dir))
+ if (!match_sysfs_device(hid, workdir, dir))
continue;
- str_id = dir->d_name + sizeof("0003:0001:0A37.");
+ str_id = dir->d_name + sizeof("0000:0000:0000.");
found = (int)strtol(str_id, NULL, 16);
break;
@@ -367,7 +374,7 @@ static int get_hid_id(int dev_id)
return found;
}
-static int get_hidraw(int dev_id)
+static int get_hidraw(struct uhid_device *hid)
{
const char *workdir = "/sys/devices/virtual/misc/uhid";
char sysfs[1024];
@@ -384,7 +391,7 @@ static int get_hidraw(int dev_id)
continue;
while ((dir = readdir(d)) != NULL) {
- if (!match_sysfs_device(dev_id, workdir, dir))
+ if (!match_sysfs_device(hid, workdir, dir))
continue;
sprintf(sysfs, "%s/%s/hidraw", workdir, dir->d_name);
@@ -416,7 +423,7 @@ static int open_hidraw(struct uhid_device *hid)
int hidraw_number;
char hidraw_path[64] = { 0 };
- hidraw_number = get_hidraw(hid->dev_id);
+ hidraw_number = get_hidraw(hid);
if (hidraw_number < 0)
return hidraw_number;
@@ -425,7 +432,8 @@ static int open_hidraw(struct uhid_device *hid)
return open(hidraw_path, O_RDWR | O_NONBLOCK);
}
-static int setup_uhid(struct __test_metadata *_metadata, struct uhid_device *hid)
+static int setup_uhid(struct __test_metadata *_metadata, struct uhid_device *hid,
+ __u16 bus, __u32 vid, __u32 pid, const __u8 *rdesc, size_t rdesc_size)
{
const char *path = "/dev/uhid";
time_t t;
@@ -435,11 +443,15 @@ static int setup_uhid(struct __test_metadata *_metadata, struct uhid_device *hid
srand((unsigned int)time(&t));
hid->dev_id = rand() % 1024;
+ hid->bus = bus;
+ hid->vid = vid;
+ hid->pid = pid;
hid->uhid_fd = open(path, O_RDWR | O_CLOEXEC);
ASSERT_GE(hid->uhid_fd, 0) TH_LOG("open uhid-cdev failed; %d", hid->uhid_fd);
- ret = uhid_create(_metadata, hid->uhid_fd, hid->dev_id);
+ ret = uhid_create(_metadata, hid->uhid_fd, hid->dev_id, bus, vid, pid,
+ (__u8 *)rdesc, rdesc_size);
ASSERT_EQ(0, ret) {
TH_LOG("create uhid device failed: %d", ret);
close(hid->uhid_fd);
@@ -447,7 +459,7 @@ static int setup_uhid(struct __test_metadata *_metadata, struct uhid_device *hid
}
/* locate the uevent file of the created device */
- hid->hid_id = get_hid_id(hid->dev_id);
+ hid->hid_id = get_hid_id(hid);
ASSERT_GT(hid->hid_id, 0)
TH_LOG("Could not locate uhid device id: %d", hid->hid_id);
diff --git a/tools/testing/selftests/hid/hidraw.c b/tools/testing/selftests/hid/hidraw.c
index 5934818b2036..821db37ba4bb 100644
--- a/tools/testing/selftests/hid/hidraw.c
+++ b/tools/testing/selftests/hid/hidraw.c
@@ -36,7 +36,7 @@ FIXTURE_SETUP(hidraw)
{
int err;
- err = setup_uhid(_metadata, &self->hid);
+ err = setup_uhid(_metadata, &self->hid, BUS_USB, 0x0001, 0x0a37, rdesc, sizeof(rdesc));
ASSERT_OK(err);
self->hidraw_fd = open_hidraw(&self->hid);
--
2.46.0
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