2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2021 Chandan Babu R. All Rights Reserved.
7 # Verify that XFS does not cause inode fork's extent count to overflow when
8 # writing to a shared extent.
10 seqres=$RESULT_DIR/$seq
11 echo "QA output created by $seq"
15 status=1 # failure is the default!
16 trap "_cleanup; exit \$status" 0 1 2 3 15
24 # get standard environment, filters and checks
30 # remove previous $seqres.full before test
33 # real QA test starts here
37 _require_scratch_reflink
39 _require_xfs_io_command "reflink"
40 _require_xfs_io_command "funshare"
41 _require_xfs_io_error_injection "reduce_max_iextents"
43 echo "Format and mount fs"
44 _scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full
45 _scratch_mount >> $seqres.full
47 bsize=$(_get_block_size $SCRATCH_MNT)
51 srcfile=${SCRATCH_MNT}/srcfile
52 dstfile=${SCRATCH_MNT}/dstfile
57 echo "Inject reduce_max_iextents error tag"
58 _scratch_inject_error reduce_max_iextents 1
60 echo "Create a \$srcfile having an extent of length $nr_blks blocks"
61 $XFS_IO_PROG -f -c "pwrite -b $((nr_blks * bsize)) 0 $((nr_blks * bsize))" \
62 -c fsync $srcfile >> $seqres.full
64 echo "* Write to shared extent"
66 echo "Share the extent with \$dstfile"
67 _reflink $srcfile $dstfile >> $seqres.full
69 echo "Buffered write to every other block of \$dstfile's shared extent"
70 for i in $(seq 1 2 $((nr_blks - 1))); do
71 $XFS_IO_PROG -f -s -c "pwrite $((i * bsize)) $bsize" $dstfile \
73 [[ $? != 0 ]] && break
76 echo "Verify \$dstfile's extent count"
77 nextents=$(_xfs_get_fsxattr nextents $dstfile)
78 if (( $nextents > 10 )); then
79 echo "Extent count overflow check failed: nextents = $nextents"
83 echo "Disable reduce_max_iextents error tag"
84 _scratch_inject_error reduce_max_iextents 0
88 echo "* Funshare shared extent"
92 echo "Inject reduce_max_iextents error tag"
93 _scratch_inject_error reduce_max_iextents 1
95 echo "Share the extent with \$dstfile"
96 _reflink $srcfile $dstfile >> $seqres.full
98 echo "Funshare every other block of \$dstfile's shared extent"
99 for i in $(seq 1 2 $((nr_blks - 1))); do
100 $XFS_IO_PROG -f -s -c "funshare $((i * bsize)) $bsize" $dstfile \
102 [[ $? != 0 ]] && break
105 echo "Verify \$dstfile's extent count"
106 nextents=$(_xfs_get_fsxattr nextents $dstfile)
107 if (( $nextents > 10 )); then
108 echo "Extent count overflow check failed: nextents = $nextents"