xfstests xfs fuzzers fail with DAX

[Eric Sandeen]

On 8/3/16 9:45 PM, Xiong Zhou wrote:
> Hi,
> 
> A few xfs fuzzers in xfstests fail with dax mount option, pass without dax.
> They are xfs/086 xfs/088 xfs/089 xfs/091.
> 
> xfstests to commit 4470ad4c7e  (Jul 26)
> kernel   to commit dd95069545  (Jul 24)
> 
> + ./check xfs/091
> FSTYP         -- xfs (non-debug)
> PLATFORM      -- Linux/x86_64 rhel73 4.7.0+
> MKFS_OPTIONS  -- -f -bsize=4096 /dev/pmem1
> MOUNT_OPTIONS -- -o context=system_u:object_r:nfs_t:s0 /dev/pmem1 /daxsch
> 
> xfs/091	 104s
> Ran: xfs/091
> Passed all 1 tests
> 
> + echo 'MOUNT_OPTIONS="-o dax"'
> + ./check xfs/091
> FSTYP         -- xfs (non-debug)
> PLATFORM      -- Linux/x86_64 rhel73 4.7.0+
> MKFS_OPTIONS  -- -f -bsize=4096 /dev/pmem1
> MOUNT_OPTIONS -- -o dax -o context=system_u:object_r:nfs_t:s0 /dev/pmem1 /daxsch
> 
> xfs/091 104s ...  - output mismatch (see /root/xfstests/results//xfs/091.out.bad)
>     --- tests/xfs/091.out	2016-07-18 02:57:47.670000000 -0400
>     +++ /root/xfstests/results//xfs/091.out.bad	2016-08-03 22:38:14.948000000 -0400
>     @@ -6,6 +6,70 @@
>      + corrupt image
>      + mount image
>      + modify files
>     +pwrite64: Structure needs cleaning
>     +pwrite64: Structure needs cleaning
>     +pwrite64: Structure needs cleaning
>     +pwrite64: Structure needs cleaning

This means the filesystem has shut down, most likely, and more information about
the error is in dmesg.

Further, if the filesystem is corrupt, xfs_repair output would be interesting.

Can you provide that information?

This can probably be reproduced, but when reporting a bug it's always good to provide
as many details as you can.

Thanks,
-Eric