fstests: btrfs/012: fix a false alert due to socket/pipe files
[BUG]
On my Archlinux VM, the test btrfs/012 always fail with the following
output diff:
QA output created by 012
+File /etc/pacman.d/gnupg/S.dirmngr is a socket while file /mnt/scratch/etc/pacman.d/gnupg/S.dirmngr is a socket
+File /etc/pacman.d/gnupg/S.gpg-agent is a socket while file /mnt/scratch/etc/pacman.d/gnupg/S.gpg-agent is a socket
+File /etc/pacman.d/gnupg/S.gpg-agent.browser is a socket while file /mnt/scratch/etc/pacman.d/gnupg/S.gpg-agent.browser is a socket
+File /etc/pacman.d/gnupg/S.gpg-agent.extra is a socket while file /mnt/scratch/etc/pacman.d/gnupg/S.gpg-agent.extra is a socket
+File /etc/pacman.d/gnupg/S.gpg-agent.ssh is a socket while file /mnt/scratch/etc/pacman.d/gnupg/S.gpg-agent.ssh is a socket
+File /etc/pacman.d/gnupg/S.keyboxd is a socket while file /mnt/scratch/etc/pacman.d/gnupg/S.keyboxd is a socket
...
[CAUSE]
It's a false alerts.
When diff hits two files which are not directory/softlink/regular files
(aka, socket/pipe/char/block files), they are all treated as
non-comparable.
In that case, diff would just do the above message.
And with Archlinux, pacman (the package manager) maintains its gpg
directory inside "/etc/pacman.d/gnupg", and the test case uses
"/etc" as the source directory to populate the target ext4 fs.
And the socket files inside "/etc/pacman.d/gnupg" is causing the false
alerts.
[FIX]
- Use fsstress to populate the fs
That covers all kind of operations, including creating special files.
And fsstress is very reproducible, with the seed saved to the full
log, it's much easier to reproduce than using the distro dependent
"/etc/" directory.
- Use fssum to save the digest and later verify the contents
It does not only verify the contents but also other things like
timestamps/xattrs/uid/gid/mode/etc.
And it's more comprehensive than the content oriented diff tool.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
2 files changed
