Re: [LTP] [PATCH 2/2] ima_violations.sh: ima_mmap.c: Replace sleep with checkpoints

[Martin Doucha <mdoucha@suse.cz>]

Hi,
for both patches:

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

On 4/28/26 18:10, Petr Vorel wrote:
> Using checkpoints is a proper way in LTP new API [1] to avoid races and
> waste of time.  It reduces 3 sec sleep in ima_mmap.c and 1 sec sleep in
> ima_violations.sh with just checkpoints.
> 
> NOTE: tst_reinit() is really needed instead of .needs_checkpoints = 1
> as documented in Shell-Test-API.asciidoc.
> 
> [1] https://people.kernel.org/metan/why-sleep-is-almost-never-acceptable-in-tests
> 
> Fixes: 0e4cbf753f ("security/ima: Rewrite tests into new API + fixes")
> Suggested-by: Cyril Hrubis <chrubis@suse.cz>
> Signed-off-by: Petr Vorel <pvorel@suse.cz>
> ---
>   testcases/kernel/security/integrity/ima/src/ima_mmap.c     | 7 ++++---
>   .../kernel/security/integrity/ima/tests/ima_violations.sh  | 6 +++++-
>   2 files changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/testcases/kernel/security/integrity/ima/src/ima_mmap.c b/testcases/kernel/security/integrity/ima/src/ima_mmap.c
> index 8596809ef4..09b22fd4f4 100644
> --- a/testcases/kernel/security/integrity/ima/src/ima_mmap.c
> +++ b/testcases/kernel/security/integrity/ima/src/ima_mmap.c
> @@ -9,7 +9,6 @@
>   
>   #include "tst_test.h"
>   
> -#define SLEEP_AFTER_CLOSE 3
>   #define MMAPSIZE 1024
>   
>   static char *filename;
> @@ -35,8 +34,10 @@ static void run(void)
>   	file = SAFE_MMAP(NULL, MMAPSIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
>   	SAFE_CLOSE(fd);
>   
> -	tst_res(TINFO, "sleep %ds", SLEEP_AFTER_CLOSE);
> -	sleep(SLEEP_AFTER_CLOSE);
> +	tst_reinit();
> +	TST_CHECKPOINT_WAIT(0);
> +	/* keep running until ima_violations.sh open and close file */
> +	TST_CHECKPOINT_WAKE_AND_WAIT(0);
>   
>   	tst_res(TPASS, "test completed");
>   }
> diff --git a/testcases/kernel/security/integrity/ima/tests/ima_violations.sh b/testcases/kernel/security/integrity/ima/tests/ima_violations.sh
> index 0c03c30786..d7dcd077b4 100755
> --- a/testcases/kernel/security/integrity/ima/tests/ima_violations.sh
> +++ b/testcases/kernel/security/integrity/ima/tests/ima_violations.sh
> @@ -8,6 +8,7 @@
>   # test[4-6] test 6.15 commit 5b3cd801155f ("ima: limit the number of open-writers integrity violations")
>   # test[7-8] test 6.15 commit a414016218ca ("ima: limit the number of ToMToU integrity violations")
>   
> +TST_NEEDS_CHECKPOINTS=1
>   TST_SETUP="setup"
>   TST_CLEANUP="cleanup"
>   TST_CNT=8
> @@ -171,12 +172,15 @@ test3()
>   
>   	ima_mmap -f $FILE &
>   	pid=$!
> +
>   	# wait for violations appear in logs
> -	tst_sleep 1s
> +	TST_CHECKPOINT_WAKE_AND_WAIT 0
>   
>   	open_file_read
>   	close_file_read
>   
> +	TST_CHECKPOINT_WAKE 0
> +
>   	validate $num_violations $count $search
>   
>   	# wait for ima_mmap to exit, so we can umount


-- 
Martin Doucha   mdoucha@suse.cz
SW Quality Engineer
SUSE LINUX, s.r.o.
CORSO IIa
Krizikova 148/34
186 00 Prague 8
Czech Republic