[LTP] [PATCH v2 1/1] fanotify10: Skip non zero ignored_onchild tests for < v5.9

[LTP] [PATCH v2 1/1] fanotify10: Skip non zero ignored_onchild tests for < v5.9

[Petr Vorel]

ignored mask in combination with flag FAN_EVENT_ON_CHILD has
undefined behavior on kernel < 5.9.

Also remove wrong kernel commit (left in e8189ff3c).

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 testcases/kernel/syscalls/fanotify/fanotify10.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/testcases/kernel/syscalls/fanotify/fanotify10.c b/testcases/kernel/syscalls/fanotify/fanotify10.c
index 2c4401f61..64426b876 100644
--- a/testcases/kernel/syscalls/fanotify/fanotify10.c
+++ b/testcases/kernel/syscalls/fanotify/fanotify10.c
@@ -20,10 +20,10 @@
  *
  *     2f02fd3fa13e fanotify: fix ignore mask logic for events on child...
  *
- * Test cases #17-#23 are regression tests for commit:
+ * Test cases #17-#23 are regression tests for commit (from v5.9, unlikely to be
+ * backported thus not in .tags):
  *
  *     497b0c5a7c06 fsnotify: send event to parent and child with single...
- *     eca4784cbb18 fsnotify: send event to parent and child with single...
  */
 #define _GNU_SOURCE
 #include "config.h"
@@ -451,6 +451,12 @@ static void test_fanotify(unsigned int n)
 
 	tst_res(TINFO, "Test #%d: %s", n, tc->tname);
 
+	if (tc->ignored_onchild && tst_kvercmp(5, 9, 0) < 0) {
+		tst_res(TCONF, "ignored mask in combination with flag FAN_EVENT_ON_CHILD"
+				" has undefined behavior on kernel < 5.9");
+		return;
+	}
+
 	if (create_fanotify_groups(n) != 0)
 		goto cleanup;
 
@@ -567,7 +573,6 @@ static struct tst_test test = {
 	.tags = (const struct tst_tag[]) {
 		{"linux-git", "9bdda4e9cf2d"},
 		{"linux-git", "2f02fd3fa13e"},
-		{"linux-git", "497b0c5a7c06"},
 		{}
 	}
 };
-- 
2.28.0

[LTP] [PATCH v2 1/1] fanotify10: Skip non zero ignored_onchild tests for < v5.9

[Amir Goldstein]

On Fri, Sep 11, 2020 at 9:51 AM Petr Vorel <pvorel@suse.cz> wrote:
>
> ignored mask in combination with flag FAN_EVENT_ON_CHILD has
> undefined behavior on kernel < 5.9.
>
> Also remove wrong kernel commit (left in e8189ff3c).
>
> Acked-by: Jan Kara <jack@suse.cz>
> Signed-off-by: Petr Vorel <pvorel@suse.cz>

Reviewed-by: Amir Goldstein <amir73il@gmail.com>

> ---
>  testcases/kernel/syscalls/fanotify/fanotify10.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/testcases/kernel/syscalls/fanotify/fanotify10.c b/testcases/kernel/syscalls/fanotify/fanotify10.c
> index 2c4401f61..64426b876 100644
> --- a/testcases/kernel/syscalls/fanotify/fanotify10.c
> +++ b/testcases/kernel/syscalls/fanotify/fanotify10.c
> @@ -20,10 +20,10 @@
>   *
>   *     2f02fd3fa13e fanotify: fix ignore mask logic for events on child...
>   *
> - * Test cases #17-#23 are regression tests for commit:
> + * Test cases #17-#23 are regression tests for commit (from v5.9, unlikely to be
> + * backported thus not in .tags):

If we are being accurate, it is only the 4 test cases with non zero
ignored_onchild
that are regression tests for this commit. The other 3 test cases are
just completing
the test matrix of possible combinations of marks.

So you may rephrase above as "Test cases with 'ignored_onchild'..."
or what not.

Thanks,
Amir.

>   *
>   *     497b0c5a7c06 fsnotify: send event to parent and child with single...
> - *     eca4784cbb18 fsnotify: send event to parent and child with single...
>   */
>  #define _GNU_SOURCE
>  #include "config.h"
> @@ -451,6 +451,12 @@ static void test_fanotify(unsigned int n)
>
>         tst_res(TINFO, "Test #%d: %s", n, tc->tname);
>
> +       if (tc->ignored_onchild && tst_kvercmp(5, 9, 0) < 0) {
> +               tst_res(TCONF, "ignored mask in combination with flag FAN_EVENT_ON_CHILD"
> +                               " has undefined behavior on kernel < 5.9");
> +               return;
> +       }
> +
>         if (create_fanotify_groups(n) != 0)
>                 goto cleanup;
>
> @@ -567,7 +573,6 @@ static struct tst_test test = {
>         .tags = (const struct tst_tag[]) {
>                 {"linux-git", "9bdda4e9cf2d"},
>                 {"linux-git", "2f02fd3fa13e"},
> -               {"linux-git", "497b0c5a7c06"},
>                 {}
>         }
>  };
> --
> 2.28.0
>

[LTP] [PATCH v2 1/1] fanotify10: Skip non zero ignored_onchild tests for < v5.9

[Petr Vorel]

Hi Amir,

> On Fri, Sep 11, 2020 at 9:51 AM Petr Vorel <pvorel@suse.cz> wrote:

> > ignored mask in combination with flag FAN_EVENT_ON_CHILD has
> > undefined behavior on kernel < 5.9.

> > Also remove wrong kernel commit (left in e8189ff3c).

> > Acked-by: Jan Kara <jack@suse.cz>
> > Signed-off-by: Petr Vorel <pvorel@suse.cz>

> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Thanks!

...
> > - * Test cases #17-#23 are regression tests for commit:
> > + * Test cases #17-#23 are regression tests for commit (from v5.9, unlikely to be
> > + * backported thus not in .tags):

> If we are being accurate, it is only the 4 test cases with non zero
> ignored_onchild
> that are regression tests for this commit. The other 3 test cases are
> just completing
> the test matrix of possible combinations of marks.

> So you may rephrase above as "Test cases with 'ignored_onchild'..."
> or what not.
Good point, I'll fix it before merge.

Kind regards,
Petr