On Thu, Nov 25, 2021 at 03:47:37PM +0800, Shiyang Ruan wrote: > Ensuring that copy on write in mmap mode works when the CoW range originally > covers multiple extents. (MMAP version of generic/185,183) > > Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx> Looks good, Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> --D > --- > tests/generic/900 | 69 +++++++++++++++++++++++++++++++++++++++++++ > tests/generic/900.out | 14 +++++++++ > 2 files changed, 83 insertions(+) > create mode 100755 tests/generic/900 > create mode 100644 tests/generic/900.out > > diff --git a/tests/generic/900 b/tests/generic/900 > new file mode 100755 > index 00000000..de76cd00 > --- /dev/null > +++ b/tests/generic/900 > @@ -0,0 +1,69 @@ > +#! /bin/bash > +# SPDX-License-Identifier: GPL-2.0 > +# > +# FS QA Test No. 900 > +# > +# Ensuring that copy on write in mmap mode works when the CoW > +# range originally covers multiple extents. (MMAP version of generic/185,183) > +# - Create two files > +# - Reflink the odd blocks of the first file into a third file. > +# - Reflink the even blocks of the second file into the third file. > +# - mmap CoW across the halfway mark. > +# - Check that the files are now different where we say they're different. > +# > +. ./common/preamble > +_begin_fstest auto quick clone > + > +# Import common functions. > +. ./common/filter > +. ./common/reflink > + > +# real QA test starts here > +_require_scratch_reflink > + > +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)) > +_pwrite_byte 0x61 0 $filesize $testdir/file1 >> $seqres.full > +_pwrite_byte 0x62 0 $filesize $testdir/file2 >> $seqres.full > +seq 0 2 $((nr-1)) | while read f; do > + _reflink_range $testdir/file1 $((blksz * f)) $testdir/file3 $((blksz * f)) $blksz >> $seqres.full > + _pwrite_byte 0x61 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full > +done > +seq 1 2 $((nr-1)) | while read f; do > + _reflink_range $testdir/file2 $((blksz * f)) $testdir/file3 $((blksz * f)) $blksz >> $seqres.full > + _pwrite_byte 0x62 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full > +done > +_scratch_cycle_mount > + > +echo "Compare files" > +md5sum $testdir/file1 | _filter_scratch > +md5sum $testdir/file2 | _filter_scratch > +md5sum $testdir/file3 | _filter_scratch > +md5sum $testdir/file3.chk | _filter_scratch > + > +echo "mmap CoW across the transition" > +cowoff=$((filesize / 4)) > +cowsz=$((filesize / 2)) > +mmapsz=$((cowoff + cowsz)) > +_mwrite_byte 0x63 $cowoff $cowsz $mmapsz $testdir/file3 >> $seqres.full > +_mwrite_byte 0x63 $cowoff $cowsz $mmapsz $testdir/file3.chk >> $seqres.full > +_scratch_cycle_mount > + > +echo "Compare files" > +md5sum $testdir/file1 | _filter_scratch > +md5sum $testdir/file2 | _filter_scratch > +md5sum $testdir/file3 | _filter_scratch > +md5sum $testdir/file3.chk | _filter_scratch > + > +# success, all done > +status=0 > +exit > diff --git a/tests/generic/900.out b/tests/generic/900.out > new file mode 100644 > index 00000000..b2569ab0 > --- /dev/null > +++ b/tests/generic/900.out > @@ -0,0 +1,14 @@ > +QA output created by 900 > +Format and mount > +Create the original files > +Compare files > +bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-900/file1 > +b83f9394092e15bdcda585cd8e776dc6 SCRATCH_MNT/test-900/file2 > +d3959a68638c50af07f0258e032cb554 SCRATCH_MNT/test-900/file3 > +d3959a68638c50af07f0258e032cb554 SCRATCH_MNT/test-900/file3.chk > +mmap CoW across the transition > +Compare files > +bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-900/file1 > +b83f9394092e15bdcda585cd8e776dc6 SCRATCH_MNT/test-900/file2 > +55968a95dfc0120df4e8485576514320 SCRATCH_MNT/test-900/file3 > +55968a95dfc0120df4e8485576514320 SCRATCH_MNT/test-900/file3.chk > -- > 2.34.0 > > >
