linux-kernel - Re: Unionmount and overlayfs testsuite

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Date:	Thu, 29 May 2014 20:44:34 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Miklos Szeredi <miklos@...redi.hu>,
	Al Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>, apw@...onical.com,
	Felix Fietkau <nbd@...nwrt.org>, neilb@...e.de,
	jordipujolp@...il.com, ezk@....cs.sunysb.edu,
	"J. R. Okajima" <hooanon05@...oo.co.jp>, mszeredi@...e.cz
Subject: Re: Unionmount and overlayfs testsuite

On Thu, May 29, 2014 at 8:22 PM, David Howells <dhowells@...hat.com> wrote:
> Sedat Dilek <sedat.dilek@...il.com> wrote:
>
>> >         TEST_OVERLAYFS=1 ./run.sh
>> >
>> > right?
>> >
>>
>> Yes (with my mount-patch applied).
>>
>> ( ...and... # umount /lower /upper /mnt )
>
> Can you put a couple of echo commands in settings.inc to show which side of
> the if-statement it goes and also put:
>
>         echo TEST_OVERLAYFS is $TEST_OVERLAYFS
>
> in run.sh and mount_union.sh?
>

I retried with the new kernel-config...

# modprobe -v overlayfs
insmod /lib/modules/3.15.0-rc7-58.1-iniza-lockdep/kernel/fs/overlayfs/overlayfs.ko

...and echo-line changes...

# LC_ALL=C TEST_OVERLAYFS="1" ./run.sh
[ run.sh ] TEST_OVERLAYFS is 1
***
*** ./run.sh open-plain.test
***
[ mount_union.sh ] TEST_OVERLAYFS is 1
TEST100: Open O_RDONLY
 - open_file -r /mnt/a/foo100 -R :xxx:yyy:zzz
 - open_file -r /mnt/a/foo100 -R :xxx:yyy:zzz
TEST101: Open O_WRONLY
 - open_file -w /mnt/a/foo101 -W q
/mnt/a/foo101: Test file not on upper filesystem  (line 30)

# LC_ALL=C df -h | egrep 'mnt|upper|lower'
lower_layer     1.9G  240K  1.9G   1% /lower
upper_layer     1.9G  4.0K  1.9G   1% /upper
overlayfs       1.9G  4.0K  1.9G   1% /mnt

# find /mnt/ /upper/ /lower/ -name foo101
/mnt/a/foo101
/upper/upper/a/foo101
/lower/a/foo101

# LC_ALL=C ll /mnt/a/foo101 /upper/upper/a/foo101 /lower/a/foo101
-rw-r--r-- 1 bin bin 12 May 29 20:42 /lower/a/foo101
-rw-r--r-- 1 bin bin 12 May 29 20:42 /mnt/a/foo101
-rw-r--r-- 1 bin bin 12 May 29 20:42 /upper/upper/a/foo101

# stat -c foo101 /mnt/ /upper/ /lower/
foo101
foo101
foo101

- Sedat -
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