[LTP] [PATCH 1/3] ipc/semget05: Fix .save_restore flags

[LTP] [PATCH 1/3] ipc/semget05: Fix .save_restore flags

[Martin Doucha]

The test can run without root privileges. Add TST_SR_SKIP_RO to ignore
read-only permissions on /proc/sys/kernel/sem.

Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---
 testcases/kernel/syscalls/ipc/semget/semget05.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/ipc/semget/semget05.c b/testcases/kernel/syscalls/ipc/semget/semget05.c
index 38b0fad3c..d6810c11b 100644
--- a/testcases/kernel/syscalls/ipc/semget/semget05.c
+++ b/testcases/kernel/syscalls/ipc/semget/semget05.c
@@ -73,7 +73,8 @@ static struct tst_test test = {
 	.cleanup = cleanup,
 	.test_all = verify_semget,
 	.save_restore = (const struct tst_path_val[]){
-		{"/proc/sys/kernel/sem", NULL, TST_SR_TCONF},
+		{"/proc/sys/kernel/sem", NULL,
+			TST_SR_TCONF_MISSING | TST_SR_SKIP_RO},
 		{}
 	}
 };
-- 
2.40.0


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[LTP] [PATCH 2/3] ipc/semget05: Set dynamic run time

[Martin Doucha]

The semget() syscall can be slow on some archs so too high default
system limit may cause timeouts. Set dynamic run time based on
semaphore limit.

Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---

I've originally tried to create an IPC namespace and set low custom limit
but IPC namespaces don't allow unprivileged users to reconfigure them
like the network namespaces do. This is the second best solution.

 testcases/kernel/syscalls/ipc/semget/semget05.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/testcases/kernel/syscalls/ipc/semget/semget05.c b/testcases/kernel/syscalls/ipc/semget/semget05.c
index d6810c11b..dd9a6285d 100644
--- a/testcases/kernel/syscalls/ipc/semget/semget05.c
+++ b/testcases/kernel/syscalls/ipc/semget/semget05.c
@@ -42,6 +42,9 @@ static void setup(void)
 		used_cnt);
 	SAFE_FILE_SCANF("/proc/sys/kernel/sem", "%*d %*d %*d %d", &maxsems);
 
+	/* Prevent timeout due to high semaphore array limit */
+	tst_set_max_runtime(maxsems / 200);
+
 	sem_id_arr = SAFE_MALLOC((maxsems - used_cnt) * sizeof(int));
 	for (num = 0; num < maxsems - used_cnt; num++) {
 		res = semget(semkey + num, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA);
-- 
2.40.0


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[LTP] [PATCH 3/3] doc: Fix typo in max_runtime docs

[Martin Doucha]

Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---
 doc/c-test-api.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/c-test-api.txt b/doc/c-test-api.txt
index bd9ec72b9..dcb6e1ba8 100644
--- a/doc/c-test-api.txt
+++ b/doc/c-test-api.txt
@@ -102,7 +102,7 @@ that should cover the duration of test setup and cleanup plus some safety.
 Any test that runs for more than a second or two has to make sure to:
 
 - set the runtime either by setting the '.max_runtime' in tst_test or by
-  calling 'tst_set_runtime()' in the test setup
+  calling 'tst_set_max_runtime()' in the test setup
 
 - monitor remaning runtime by regular calls to 'tst_remaining_runtime()' and
   exit when runtime has been used up
-- 
2.40.0


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Re: [LTP] [PATCH 3/3] doc: Fix typo in max_runtime docs

[Petr Vorel]

Hi Martin,

I merged this simple fix.
And I'll ask in "LTP release preparations" thread for merging this.
Thanks!

Kind regards,
Petr

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Re: [LTP] [PATCH 1/3] ipc/semget05: Fix .save_restore flags

[Petr Vorel]

Hi Martin,

> The test can run without root privileges. Add TST_SR_SKIP_RO to ignore
> read-only permissions on /proc/sys/kernel/sem.

Very good catch, thanks!
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Tested-by: Petr Vorel <pvorel@suse.cz>

Kind regards,
Petr

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Re: [LTP] [PATCH 2/3] ipc/semget05: Set dynamic run time

[Petr Vorel]

Hi Martin,

> The semget() syscall can be slow on some archs so too high default
> system limit may cause timeouts. Set dynamic run time based on
> semaphore limit.

> I've originally tried to create an IPC namespace and set low custom limit
> but IPC namespaces don't allow unprivileged users to reconfigure them
> like the network namespaces do. This is the second best solution.

IMHO good enough.
Reviewed-by: Petr Vorel <pvorel@suse.cz>

Kind regards,
Petr

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Re: [LTP] [PATCH 3/3] doc: Fix typo in max_runtime docs

[Yang Xu (Fujitsu)]

Hi Petr, Martin

> Hi Martin,
> 
> I merged this simple fix.
> And I'll ask in "LTP release preparations" thread for merging this.

This patchset is LGTM, I don't see this email and has merged this 
patchset, sorry.

ps: This patchset is simple change, so I guess it will not affect
a lot for "LTP release preparations".

Best Regards
Yang Xu
> Thanks!
> 
> Kind regards,
> Petr
> 

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