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

Petr Vorel
2026-04-29T12:00:39Z

Hi Martin, all,

> Hi,
> for both patches:

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

Thanks for review, patchset merged.

Kind regards,
Petr

> 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