diff --git a/tests/btrfs/105 b/tests/btrfs/105 new file mode 100755 index 00000000..be051fe5 --- /dev/null +++ b/tests/btrfs/105 @@ -0,0 +1,112 @@ +#! /bin/bash +# FS QA Test No. btrfs/105 +# +# Test that an incremental send works after a file from the parent snapshot +# gets replaced in the send snapshot by another one at the same exact location, +# with the same name and with the same inode number. +# +#----------------------------------------------------------------------- +# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved. +# Author: Filipe Manana +# Copyright (C) 2015 Martin Raiber +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -fr $send_files_dir + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter + +# real QA test starts here +_supported_fs btrfs +_supported_os Linux +_require_scratch +_need_to_be_root + +send_files_dir=$TEST_DIR/btrfs-test-$seq + +rm -f $seqres.full +rm -fr $send_files_dir +mkdir $send_files_dir + +_scratch_mkfs >>$seqres.full 2>&1 +_scratch_mount + +# Create our test file with a single extent of 64K. +mkdir -p $SCRATCH_MNT/foo +$XFS_IO_PROG -f -c "pwrite -S 0xaa 0 64K" $SCRATCH_MNT/foo/bar | _filter_xfs_io + +_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 +_run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT $SCRATCH_MNT/mysnap2 + +echo "File digest before being replaced:" +md5sum $SCRATCH_MNT/mysnap1/foo/bar | _filter_scratch + +# Remove the file and then create a new one in the same location with the same +# name but with different content. This new file ends up getting the same inode +# number as the previous one, because that inode number was the highest inode +# number used by the snapshot's root and therefore when attempting to find the +# a new inode number for the new file, we end up reusing the same inode number. +# This happens because currently btrfs uses the highest inode number summed by 1 +# for the first inode created once a snapshot's root is loaded (done at +# fs/btrfs/inode-map.c:btrfs_find_free_objectid in the linux kernel tree). +# Having these two different files in the snapshots with the same inode number +# (but different generation numbers) caused the btrfs send code to emit an +# incorrect path for the file when issuing an unlink operation because it failed +# to realize they were different files. +rm -f $SCRATCH_MNT/mysnap2/foo/bar +$XFS_IO_PROG -f -c "pwrite -S 0xbb 0 96K" \ + $SCRATCH_MNT/mysnap2/foo/bar | _filter_xfs_io + +_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT/mysnap2 \ + $SCRATCH_MNT/mysnap2_ro + +_run_btrfs_util_prog send $SCRATCH_MNT/mysnap1 -f $send_files_dir/1.snap +_run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 $SCRATCH_MNT/mysnap2_ro \ + -f $send_files_dir/2.snap + +echo "File digest in the original filesystem after being replaced:" +md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch + +# Now recreate the filesystem by receiving both send streams and verify we get +# the same file contents that the original filesystem had. +_scratch_unmount +_scratch_mkfs >>$seqres.full 2>&1 +_scratch_mount + +_run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap +_run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/2.snap + +echo "File digest in the new filesystem:" +# Must match the digest from the new file. +md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch + +status=0 +exit \ No newline at end of file diff --git a/tests/btrfs/105.out b/tests/btrfs/105.out new file mode 100644 index 00000000..09e11ed4 --- /dev/null +++ b/tests/btrfs/105.out @@ -0,0 +1,11 @@ +QA output created by 105 +wrote 65536/65536 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +File digest before being replaced: +9802287a6faa01a1fd0e01732b732fca SCRATCH_MNT/mysnap1/foo/bar +wrote 98304/98304 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +File digest in the original filesystem after being replaced: +de277dfac706c359613033120349cf88 SCRATCH_MNT/mysnap2_ro/foo/bar +File digest in the new filesystem: +de277dfac706c359613033120349cf88 SCRATCH_MNT/mysnap2_ro/foo/bar diff --git a/tests/btrfs/group b/tests/btrfs/group index 6218adfa..02d94dc8 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -107,3 +107,4 @@ 102 auto quick metadata enospc 103 auto quick clone compress 104 auto qgroup +105 auto quick send