On Fri, Dec 17, 2021 at 10:32:34AM -0500, Brian Foster wrote: > Test that COW writeback that overlaps non-shared delalloc blocks > does not leave around stale delalloc blocks on I/O failure. This > triggers assert failures and free space accounting corruption on > XFS. > > Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx> > --- > > v3: > - Use fsync and sync_range to avoid spurious failure caused by log I/O > errors. > - Add kernel commit reference. > v2: https://lore.kernel.org/fstests/20211025130053.8343-1-bfoster@xxxxxxxxxx/ > - Explicitly set COW extent size hint. > - Move to tests/xfs. > - Various minor cleanups. > v1: https://lore.kernel.org/fstests/20211021163959.1887011-1-bfoster@xxxxxxxxxx/ > > tests/xfs/999 | 67 +++++++++++++++++++++++++++++++++++++++++++++++ > tests/xfs/999.out | 2 ++ > 2 files changed, 69 insertions(+) > create mode 100755 tests/xfs/999 > create mode 100644 tests/xfs/999.out > > diff --git a/tests/xfs/999 b/tests/xfs/999 > new file mode 100755 > index 00000000..4308c0da > --- /dev/null > +++ b/tests/xfs/999 > @@ -0,0 +1,67 @@ > +#! /bin/bash > +# SPDX-License-Identifier: GPL-2.0 > +# Copyright (c) 2021 Red Hat, Inc. All Rights Reserved. > +# > +# FS QA Test 999 > +# > +# Test that COW writeback that overlaps non-shared delalloc blocks does not > +# leave around stale delalloc blocks on I/O failure. This triggers assert > +# failures and free space accounting corruption on XFS. Fixed by upstream kernel > +# commit 5ca5916b6bc9 ("xfs: punch out data fork delalloc blocks on COW > +# writeback failure"). > +# > +. ./common/preamble > +_begin_fstest auto quick clone > + > +_cleanup() > +{ > + _cleanup_flakey > + cd / > + rm -r -f $tmp.* > +} > + > +# Import common functions. > +. ./common/reflink > +. ./common/dmflakey > + > +# real QA test starts here > +_supported_fs xfs > +_require_scratch_reflink > +_require_cp_reflink > +_require_xfs_io_command "cowextsize" > +_require_flakey_with_error_writes > + > +_scratch_mkfs >> $seqres.full > +_init_flakey > +_mount_flakey > + > +blksz=$(_get_file_block_size $SCRATCH_MNT) > + > +# Set the COW extent size hint to guarantee COW fork preallocation occurs over a > +# bordering block offset. > +$XFS_IO_PROG -c "cowextsize $((blksz * 2))" $SCRATCH_MNT >> $seqres.full > + > +# create two files that share a single block > +$XFS_IO_PROG -fc "pwrite $blksz $blksz" $SCRATCH_MNT/file1 >> $seqres.full > +$XFS_IO_PROG -fc "reflink $SCRATCH_MNT/file1" \ > + -c fsync $SCRATCH_MNT/file2 >> $seqres.full > + > +# Perform a buffered write across the shared and non-shared blocks. On XFS, this > +# creates a COW fork extent that covers the shared block as well as the just > +# created non-shared delalloc block. Fail the writeback to verify that all > +# delayed allocation is cleaned up properly. > +_load_flakey_table $FLAKEY_ERROR_WRITES > +len=$((blksz * 2)) > +$XFS_IO_PROG -c "pwrite 0 $len" \ > + -c "sync_range -w 0 $len" $SCRATCH_MNT/file2 \ > + -c "sync_range -a 0 $len" >> $seqres.full Nit: put $SCRATCH_MNT/file2 at the end? Otherwise looks ok to me, so I'll give this one a spin on my test infrastructure tonight. In the mean time, Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> --D > +_load_flakey_table $FLAKEY_ALLOW_WRITES > + > +# Try a post-fail reflink and then unmount. Both of these are known to produce > +# errors and/or assert failures on XFS if we trip over a stale delalloc block. > +_cp_reflink $SCRATCH_MNT/file2 $SCRATCH_MNT/file3 > +_unmount_flakey > + > +# success, all done > +status=0 > +exit > diff --git a/tests/xfs/999.out b/tests/xfs/999.out > new file mode 100644 > index 00000000..95d64cf0 > --- /dev/null > +++ b/tests/xfs/999.out > @@ -0,0 +1,2 @@ > +QA output created by 999 > +sync_file_range: Input/output error > -- > 2.31.1 >
