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> --- 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
