[LTP] [PATCH 1/2] syscalls/fanotify14: Encode the expected errno in test case

[Petr Vorel]

> On Tue, Jul 19, 2022 at 11:58:52AM +0200, Amir Goldstein wrote:
> > So we can add test cases for errors other than EINVAL.

> Just one optional nit. We can probably remove the comments which are
> directly above the existing `if (errno == EINVAL)` checks as they're
> specific to one expected errno value, but this is no longer the case
> with ENOTDIR now in some fanotify_init/fanotify_mark cases.

@Amir, I can remove it in this commit before merge (see diff below),
but don't you want to keep this info somewhere?
Or feel free to post new version.

BTW I tested both commits on various kernels and it works as expected
(failing only on 5.17.3 (openSUSE) 5.18.5, (Debian), old kernels TCONF
as expected.

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

> Feel free to add RVB tags.

@Matthew FYI adding it with correct form in the email reply help us maintainers
to get it added automatically via LTP patchwork instance.

Kind regards,
Petr

diff --git a/testcases/kernel/syscalls/fanotify/fanotify14.c b/testcases/kernel/syscalls/fanotify/fanotify14.c
index c99e19706..ce7e4c54c 100644
--- a/testcases/kernel/syscalls/fanotify/fanotify14.c
+++ b/testcases/kernel/syscalls/fanotify/fanotify14.c
@@ -84,11 +84,6 @@ static void do_test(unsigned int number)
 
 	fanotify_fd = fanotify_init(tc->init_flags, O_RDONLY);
 	if (fanotify_fd < 0) {
-		/*
-		 * EINVAL is to be returned to the calling process when
-		 * an invalid notification class is specified in
-		 * conjunction with FAN_REPORT_FID.
-		 */
 		if (errno == tc->expected_errno) {
 			tst_res(TPASS,
 				"fanotify_fd=%d, fanotify_init(%x, O_RDONLY) "
@@ -121,12 +116,6 @@ static void do_test(unsigned int number)
 	ret = fanotify_mark(fanotify_fd, FAN_MARK_ADD | tc->mark_flags,
 				tc->mask, AT_FDCWD, FILE1);
 	if (ret < 0) {
-		/*
-		 * EINVAL is to be returned to the calling process when
-		 * attempting to use INODE_EVENTS without FAN_REPORT_FID
-		 * specified on the notification group, or using
-		 * INODE_EVENTS with mark type FAN_MARK_MOUNT.
-		 */
 		if (errno == tc->expected_errno) {
 			tst_res(TPASS,
 				"ret=%d, fanotify_mark(%d, FAN_MARK_ADD | %x, "