Ensuring that copy on write in buffered mode works when the CoW range originally covers multiple extents, mixed with reflinked, unwritten, hole, regular and delalloc blocks. Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx> --- tests/generic/912 | 67 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/912.out | 12 ++++++++ 2 files changed, 79 insertions(+) create mode 100755 tests/generic/912 create mode 100644 tests/generic/912.out diff --git a/tests/generic/912 b/tests/generic/912 new file mode 100755 index 00000000..4f0d94dd --- /dev/null +++ b/tests/generic/912 @@ -0,0 +1,67 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# FS QA Test No. 912 +# +# Ensuring that copy on write in mmap mode works when the CoW +# range originally covers multiple extents, mixed with reflinked, unwritten, +# hole, regular and delalloc blocks. +# - Create a file with the following repeating sequence of blocks: +# 1. reflinked +# 2. unwritten +# 3. hole +# 4. regular block +# 5. delalloc +# - mmap CoW across the halfway mark, starting with the unwritten extent. +# - Check that the files are now different where we say they're different. +# +. ./common/preamble +_begin_fstest auto quick clone punch + +# Import common functions. +. ./common/filter +. ./common/reflink + +# real QA test starts here +_require_scratch_reflink +_require_xfs_io_command "falloc" +_require_xfs_io_command "fpunch" +_require_cp_reflink +_require_odirect + +echo "Format and mount" +_scratch_mkfs > $seqres.full 2>&1 +_scratch_mount >> $seqres.full 2>&1 + +testdir=$SCRATCH_MNT/test-$seq +mkdir $testdir + +echo "Create the original files" +blksz=65536 +nr=64 +filesize=$((blksz * nr)) +_sweave_reflink_rainbow $blksz $nr $testdir/file1 $testdir/file3 >> $seqres.full +_scratch_cycle_mount + +echo "Compare files" +md5sum $testdir/file1 | _filter_scratch +md5sum $testdir/file3 | _filter_scratch +md5sum $testdir/file1.chk | _filter_scratch + +echo "mmap CoW across the transition" +cowoff=$((filesize / 4)) +cowsz=$((filesize / 2)) +_sweave_reflink_rainbow_delalloc $blksz $nr $testdir/file1 >> $seqres.full +# now cow +mmapsz=$((cowoff + cowsz)) +_mwrite_byte 0x63 $cowoff $cowsz $mmapsz $testdir/file1 >> $seqres.full +_mwrite_byte 0x63 $cowoff $cowsz $mmapsz $testdir/file1.chk >> $seqres.full +_scratch_cycle_mount + +echo "Compare files" +md5sum $testdir/file1 | _filter_scratch +md5sum $testdir/file3 | _filter_scratch +md5sum $testdir/file1.chk | _filter_scratch + +# success, all done +status=0 diff --git a/tests/generic/912.out b/tests/generic/912.out new file mode 100644 index 00000000..32f25a1d --- /dev/null +++ b/tests/generic/912.out @@ -0,0 +1,12 @@ +QA output created by 912 +Format and mount +Create the original files +Compare files +6366fd359371414186688a0ef6988893 SCRATCH_MNT/test-912/file1 +bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-912/file3 +6366fd359371414186688a0ef6988893 SCRATCH_MNT/test-912/file1.chk +mmap CoW across the transition +Compare files +26aa3a0749b867ec58363c8539ee5471 SCRATCH_MNT/test-912/file1 +bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-912/file3 +26aa3a0749b867ec58363c8539ee5471 SCRATCH_MNT/test-912/file1.chk -- 2.34.0
