[LTP] [PATCH] Verify virtual device availability

[LTP] [PATCH] Verify virtual device availability

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Virtual device is supposed to be found in /dev/uinput or
/dev/input/uinput, but in some cases this is not true. For instance, a
kernel which is not exposing any virtual device. This patch is meant to
verify that the device is available and we eventually skip test if it's
not found.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
Just skip tests which cannot find any virtual device in the current
system.
---
 testcases/kernel/input/input01.c    | 3 +++
 testcases/kernel/input/input02.c    | 3 +++
 testcases/kernel/input/input03.c    | 2 ++
 testcases/kernel/input/input04.c    | 3 +++
 testcases/kernel/input/input05.c    | 3 +++
 testcases/kernel/input/input06.c    | 2 ++
 testcases/kernel/uevents/uevent03.c | 3 +++
 7 files changed, 19 insertions(+)

diff --git a/testcases/kernel/input/input01.c b/testcases/kernel/input/input01.c
index 0872204111b81fd19a1525ef7f099e8ddead9658..5e85133028e25ea4a4596475f9aa876cb913694d 100644
--- a/testcases/kernel/input/input01.c
+++ b/testcases/kernel/input/input01.c
@@ -53,6 +53,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(fd_send);
 	create_input_device(fd_send);
 
diff --git a/testcases/kernel/input/input02.c b/testcases/kernel/input/input02.c
index eeff54ed21cbff6eac2d90dc53c6447d379e29ed..8e48f12d9a1108c9a5b1d8452e07386d5534fbfb 100644
--- a/testcases/kernel/input/input02.c
+++ b/testcases/kernel/input/input02.c
@@ -53,6 +53,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(fd_send);
 	create_input_device(fd_send);
 
diff --git a/testcases/kernel/input/input03.c b/testcases/kernel/input/input03.c
index 4a3eb464ee0322b134f44158a08dbb4ed000216f..2e6161beefccc1133b654be8cf2529e97610960f 100644
--- a/testcases/kernel/input/input03.c
+++ b/testcases/kernel/input/input03.c
@@ -82,6 +82,8 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
 
 	setup_mouse_events(fd_send);
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_KEY);
diff --git a/testcases/kernel/input/input04.c b/testcases/kernel/input/input04.c
index 3c76d7c82ad7fe76f35f5a4ecfc78f27069d3fa0..fb13500fe6ab5eba7fed4640ed51dfbc8105cd09 100644
--- a/testcases/kernel/input/input04.c
+++ b/testcases/kernel/input/input04.c
@@ -33,6 +33,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(fd_send);
 	create_input_device(fd_send);
 
diff --git a/testcases/kernel/input/input05.c b/testcases/kernel/input/input05.c
index 4e5072a038ea8e4f7b8e0899d88a58bdf18e9e94..fa37ac7acb22b690b7bb35d9fe655d3e49532a61 100644
--- a/testcases/kernel/input/input05.c
+++ b/testcases/kernel/input/input05.c
@@ -38,6 +38,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_KEY);
 	SAFE_IOCTL(fd_send, UI_SET_KEYBIT, BTN_LEFT);
 	create_input_device(fd_send);
diff --git a/testcases/kernel/input/input06.c b/testcases/kernel/input/input06.c
index cb871cbaec0fc8e35182dc0256dc2672dae4a419..d3584a2b0b9f540b29def3d98b7c77db09faefe9 100644
--- a/testcases/kernel/input/input06.c
+++ b/testcases/kernel/input/input06.c
@@ -178,6 +178,8 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
 
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_KEY);
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_REP);
diff --git a/testcases/kernel/uevents/uevent03.c b/testcases/kernel/uevents/uevent03.c
index 5b3dd701f0cf8f2f12a910b57d5f49d58712fe52..f7072db1c5f076e811e473438db3aa895644eaec 100644
--- a/testcases/kernel/uevents/uevent03.c
+++ b/testcases/kernel/uevents/uevent03.c
@@ -27,6 +27,9 @@ static int mouse_fd;
 static void create_uinput_mouse(void)
 {
 	mouse_fd = open_uinput();
+	if (mouse_fd == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(mouse_fd);
 	create_input_device(mouse_fd);
 }

---
base-commit: b5e2ea3cc02a2466c5bee3b0e650869f4ddf438c
change-id: 20241210-fix_input_suite-5c9c2546aaa2

Best regards,
-- 
Andrea Cervesato <andrea.cervesato@suse.com>


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Re: [LTP] [PATCH] Verify virtual device availability

[Petr Vorel]

Hi Andrea,

Looks reasonable.
Reviewed-by: Petr Vorel <pvorel@suse.cz>

Kind regards,
Petr

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Re: [LTP] [PATCH] Verify virtual device availability

[Petr Vorel]

Hi Andrea,

...
>  static void setup(void)
>  {
>  	fd_send = open_uinput();
> +	if (fd_send == -1)
> +		tst_brk(TCONF, "Virtual device is not available");

Thinking about it twice, how about renaming the function safe_open_uinput()
and add tst_brk(TCONF, ...) there?

Function is not used in library where tst_brk(TCONF, ...) would be problematic,
therefore I would not even bother with having SAFE_OPEN_UINPUT() which would
evaluate open_uinput().

Kind regards,
Petr

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Re: [LTP] [PATCH] Verify virtual device availability

[Andrea Cervesato via ltp]

Hi Petr,

On 12/10/24 21:22, Petr Vorel wrote:
> Hi Andrea,
>
> ...
>>   static void setup(void)
>>   {
>>   	fd_send = open_uinput();
>> +	if (fd_send == -1)
>> +		tst_brk(TCONF, "Virtual device is not available");
> Thinking about it twice, how about renaming the function safe_open_uinput()
> and add tst_brk(TCONF, ...) there?
>
> Function is not used in library where tst_brk(TCONF, ...) would be problematic,
> therefore I would not even bother with having SAFE_OPEN_UINPUT() which would
> evaluate open_uinput().
Usually SAFE_* macros just TBROK the tests, so I'm not sure about this 
approach.
Alternatives?
> Kind regards,
> Petr
Andrea

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Re: [LTP] [PATCH] Verify virtual device availability

[Andrea Cervesato via ltp]

Pushed, thanks!

Andrea

On 12/10/24 18:21, Petr Vorel wrote:
> Reviewed-by: Petr Vorel<pvorel@suse.cz>

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