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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat, inc. All Rights Reserved.
#
# FS QA Test 118
#
# Test xfs_fsr's handling of 2-extent files with preallocation
#
# An error in xfs_swap_extent_forks() incorrectly set up the
# temporary inode's if_extents pointer to inline, leading to
# in-memory corruption when the temporary inode was released
# and torn down; i_itemp and d_ops got overwritten with zeros,
# which led to an oops in xfs_trans_log_inode down the fput path.
#
# Fixed upstream by proper nextents counting using
# ip->i_df.if_bytes not ip->i_d.di_nextents in xfs_swap_extent_forks
#
. ./common/preamble
_begin_fstest auto quick fsr prealloc
# Import common functions.
. ./common/filter
_supported_fs xfs
_require_scratch
_require_command "$XFS_FSR_PROG" "xfs_fsr"
_require_xfs_io_command "falloc"
# 50M
_scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seqres.full 2>&1
_scratch_mount
echo "Silence is golden"
# Fragment freespace
# The aim is to create a fragmented two-extent file *with* prealloc
# so make the free holes big enough that a 2-extent file will have
# preallocation added. Let's say... 64k free chunks.
$XFS_IO_PROG -fs -c "falloc 0 40000k" $SCRATCH_MNT/fill >> $seqres.full 2>&1
sync
dd if=/dev/zero of=$SCRATCH_MNT/remainder oflag=direct > /dev/null 2>&1
# Free up a bunch of 64k chunks
for i in `seq 0 68 40000`; do
$XFS_IO_PROG -fs -c "unresvsp ${i}k 64k" $SCRATCH_MNT/fill
done
# Create 2-extent files w/ preallocation (via extending writes)
for I in `seq 1 64`; do
$XFS_IO_PROG -f -c "pwrite 0 64k" $SCRATCH_MNT/newfile-$I \
>> $seqres.full 2>&1
$XFS_IO_PROG -f -c "pwrite 64k 64k" $SCRATCH_MNT/newfile-$I \
>> $seqres.full 2>&1
done
# sync to get extents on disk so fsr sees them
sync
# Free up some space for defragmentation temp file
rm -f $SCRATCH_MNT/fill
$XFS_FSR_PROG -vd $SCRATCH_MNT/newfile* >> $seqres.full 2>&1
# success, all done
status=0
exit
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