[LTP] [PATCH 3/6] fanotify: Switch event and mark tests to *_on_fs() variant

[Petr Vorel]

Hi Jan, Amir,

> Switch event availability and mark type availability tests to be
> performed on the filesystem actually used for testing instead of on the
> current directory. This is more reliable as not all filesystems support
> the same set of features.

Jan, unfortunately this commit breaks fanotify09 and fanotify10 on SLES15 based kernels:

# ./fanotify09
tst_device.c:97: TINFO: Found free device 0 '/dev/loop0'
tst_test.c:1106: TINFO: Formatting /dev/loop0 with ext2 opts='' extra opts=''
mke2fs 1.46.4 (18-Aug-2021)
tst_test.c:1120: TINFO: Mounting /dev/loop0 to /tmp/LTP_fanRt2Q1k/fs_mnt fstyp=ext2 flags=0
tst_test.c:1690: TINFO: LTP version: 20230929-156-gf7f69b7ef
tst_test.c:1576: TINFO: Timeout per run is 0h 00m 30s
fanotify.h:210: TBROK: fanotify_mark (3, FAN_MARK_ADD, ..., AT_FDCWD, fs_mnt) failed: EINVAL (22)
...

# ./fanotify10
tst_device.c:97: TINFO: Found free device 0 '/dev/loop0'
tst_test.c:1106: TINFO: Formatting /dev/loop0 with ext2 opts='' extra opts=''
mke2fs 1.46.4 (18-Aug-2021)
tst_test.c:1120: TINFO: Mounting /dev/loop0 to /tmp/LTP_fanTNt5os/fs_mnt fstyp=ext2 flags=0
tst_test.c:1690: TINFO: LTP version: 20230929-156-gf7f69b7ef
tst_test.c:1576: TINFO: Timeout per run is 0h 00m 30s
fanotify.h:210: TBROK: fanotify_mark (3, FAN_MARK_ADD, ..., AT_FDCWD, fs_mnt) failed: EINVAL (22)
fanotify10.c:948: TWARN: unlink(fs_mnt/testdir/testfile) failed: ENOENT (2)
fanotify10.c:949: TWARN: rmdir(fs_mnt/testdir/testdir2) failed: ENOENT (2)
fanotify10.c:950: TWARN: rmdir(fs_mnt/testdir) failed: ENOENT (2)
fanotify10.c:951: TWARN: rmdir(mntpoint) failed: ENOENT (2)
...

I suppose the problem is somewhere in fanotify_flags_supported_on_fs(), i.e. in
the first commit. It works well on Tumbleweed, which uses latest official stable
kernel.

Can you please have look on the issue?

Kind regards,
Petr