Ensuring that copy on write in mmap mode works when the CoW range originally covers multiple extents, some unwritten, some not. (MMAP version of generic/189,188) Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx> Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> --- tests/generic/902 | 59 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/902.out | 12 +++++++++ 2 files changed, 71 insertions(+) create mode 100755 tests/generic/902 create mode 100644 tests/generic/902.out diff --git a/tests/generic/902 b/tests/generic/902 new file mode 100755 index 00000000..457b039a --- /dev/null +++ b/tests/generic/902 @@ -0,0 +1,59 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# FS QA Test No. 902 +# +# Ensuring that copy on write in mmap mode works when the CoW +# range originally covers multiple extents, some unwritten, some not. +# (MMAP version of generic/189,188) +# - Create a file and fallocate a second file. +# - Reflink the odd blocks of the first file into the second file. +# - 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 + +# Import common functions. +. ./common/filter +. ./common/reflink + +# real QA test starts here +_require_scratch_reflink +_require_xfs_io_command "falloc" + +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)) +_weave_reflink_unwritten $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 $testdir/file3.chk | _filter_scratch + +echo "mmap CoW across the transition" +cowoff=$((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/file3 | _filter_scratch +md5sum $testdir/file3.chk | _filter_scratch + +# success, all done +status=0 +exit diff --git a/tests/generic/902.out b/tests/generic/902.out new file mode 100644 index 00000000..bc951255 --- /dev/null +++ b/tests/generic/902.out @@ -0,0 +1,12 @@ +QA output created by 902 +Format and mount +Create the original files +Compare files +bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-902/file1 +fa50dba51826899c372464a153cb2117 SCRATCH_MNT/test-902/file3 +fa50dba51826899c372464a153cb2117 SCRATCH_MNT/test-902/file3.chk +mmap CoW across the transition +Compare files +bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-902/file1 +09101629908f9bdd5d178e7ce20bb1bb SCRATCH_MNT/test-902/file3 +09101629908f9bdd5d178e7ce20bb1bb SCRATCH_MNT/test-902/file3.chk -- 2.34.1
