From: "Darrick J. Wong" <djwong@kernel.org>
To: Chandan Babu R <chandanrlinux@gmail.com>
Cc: fstests@vger.kernel.org, linux-xfs@vger.kernel.org
Subject: Re: [PATCH V6 13/13] xfs: Stress test with bmap_alloc_minlen_extent error tag enabled
Date: Thu, 25 Mar 2021 21:21:17 -0700 [thread overview]
Message-ID: <20210326042117.GS4090233@magnolia> (raw)
In-Reply-To: <8735wir242.fsf@garuda>
On Fri, Mar 26, 2021 at 09:35:33AM +0530, Chandan Babu R wrote:
> On 23 Mar 2021 at 10:58, Chandan Babu R wrote:
> > On 23 Mar 2021 at 00:24, Darrick J. Wong wrote:
> >> On Tue, Mar 09, 2021 at 10:31:24AM +0530, Chandan Babu R wrote:
> >>> This commit adds a stress test that executes fsstress with
> >>> bmap_alloc_minlen_extent error tag enabled.
> >>
> >> Continuing along the theme of watching the magic smoke come out when dir
> >> block size > fs block size, I also observed the following assertion when
> >> running this test:
>
> Apart from "xfs_dir2_shrink_inode only calls xfs_bunmapi once" bug, I
> noticed that scrub has detected metadata inconsistency,
>
> FSTYP -- xfs (debug)
> PLATFORM -- Linux/x86_64 debian-guest 5.12.0-rc4-chandan #30 SMP Thu Mar 25 11:00:08 IST 2021
> MKFS_OPTIONS -- -f -b size=1k -m rmapbt=0,reflink=0 -n size=64k /dev/vdc2
> MOUNT_OPTIONS -- /dev/vdc2 /mnt/scratch
>
> xfs/538 43s ... _check_xfs_filesystem: filesystem on /dev/vdc2 failed scrub
> (see /root/repos/xfstests-dev/results//xfs/538.full for details)
>
> Ran: xfs/538
> Failures: xfs/538
> Failed 1 of 1 tests
>
> I will work on fixing this one as well.
Yeah, I noticed that too. There are two bugs -- the first one is that
the "Block directories only have a single block at offset 0" check in
xchk_directory_blocks is wrong -- they can have a single *dir* block at
offset 0. The correct check is (I think):
if (is_block && got.br_startoff >= args.geo->fsbcount) {
xchk_fblock_set_corrupt(...);
break;
}
The second problem is ... somewhere in the bmbt scrubber. It looks like
there's a file with a data fork in btree format; the data fork has a
single child block; and there are few enough key/ptrs in that child
block that it /could/ fit in the root. For some reason the btree code
didn't promote it, however. Seeing as nobody's touched that code
lately, that probably means that scrub is wrong, but OTOH that /does/
seem like a waste of a block.
But, that's as far as I've gotten on that second one and it's late.
Thanks for taking a look! :)
--D
> --
> chandan
next prev parent reply other threads:[~2021-03-26 4:22 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 5:01 [PATCH V6 00/13] xfs: Tests to verify inode fork extent count overflow detection Chandan Babu R
2021-03-09 5:01 ` [PATCH V6 01/13] _check_xfs_filesystem: sync fs before running scrub Chandan Babu R
2021-03-09 5:03 ` Darrick J. Wong
2021-03-10 6:12 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 02/13] common/xfs: Add a helper to get an inode fork's extent count Chandan Babu R
2021-03-09 5:04 ` Darrick J. Wong
2021-03-10 6:12 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 03/13] common/xfs: Add helper to obtain fsxattr field value Chandan Babu R
2021-03-09 5:04 ` Darrick J. Wong
2021-03-10 6:13 ` Allison Henderson
2021-03-10 19:54 ` Darrick J. Wong
2021-03-11 2:54 ` Chandan Babu R
2021-03-11 8:52 ` [PATCH V6.1] " Chandan Babu R
2021-03-11 18:36 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 04/13] xfs: Check for extent overflow when trivally adding a new extent Chandan Babu R
2021-03-10 19:54 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 05/13] xfs: Check for extent overflow when growing realtime bitmap/summary inodes Chandan Babu R
2021-03-10 19:55 ` Allison Henderson
2021-03-22 17:56 ` Darrick J. Wong
2021-03-23 15:51 ` Chandan Babu R
2021-03-23 20:57 ` Darrick J. Wong
2021-03-24 10:46 ` Chandan Babu R
2021-03-24 14:17 ` Chandan Babu R
2021-03-09 5:01 ` [PATCH V6 06/13] xfs: Check for extent overflow when punching a hole Chandan Babu R
2021-03-10 19:55 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 07/13] xfs: Check for extent overflow when adding/removing xattrs Chandan Babu R
2021-03-10 19:55 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 08/13] xfs: Check for extent overflow when adding/removing dir entries Chandan Babu R
2021-03-10 22:41 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 09/13] xfs: Check for extent overflow when writing to unwritten extent Chandan Babu R
2021-03-10 22:41 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 10/13] xfs: Check for extent overflow when moving extent from cow to data fork Chandan Babu R
2021-03-10 22:41 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 11/13] xfs: Check for extent overflow when remapping an extent Chandan Babu R
2021-03-10 23:49 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 12/13] xfs: Check for extent overflow when swapping extents Chandan Babu R
2021-03-10 23:49 ` Allison Henderson
2021-03-09 5:01 ` [PATCH V6 13/13] xfs: Stress test with bmap_alloc_minlen_extent error tag enabled Chandan Babu R
2021-03-10 23:49 ` Allison Henderson
2021-03-22 18:54 ` Darrick J. Wong
2021-03-23 5:28 ` Chandan Babu R
2021-03-23 11:27 ` Chandan Babu R
2021-03-26 4:05 ` Chandan Babu R
2021-03-26 4:21 ` Darrick J. Wong [this message]
2021-04-15 9:33 ` Chandan Babu R
2021-04-17 0:26 ` Darrick J. Wong
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