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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. btrfs/155
#
# Test that an incremental send operation works if a file that has multiple
# hard links has some of its hard links renamed in the send snapshot, with one
# of them getting the same path that some other inode had in the send snapshot.
#
. ./common/preamble
_begin_fstest auto quick send
# Override the default cleanup function.
_cleanup()
{
cd /
rm -fr $send_files_dir
rm -f $tmp.*
}
. ./common/filter
_supported_fs btrfs
_require_test
_require_scratch
_require_fssum
send_files_dir=$TEST_DIR/btrfs-test-$seq
rm -fr $send_files_dir
mkdir $send_files_dir
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
mkdir $SCRATCH_MNT/a
touch $SCRATCH_MNT/a/f1
mkdir -p $SCRATCH_MNT/a/b/c
ln $SCRATCH_MNT/a/f1 $SCRATCH_MNT/a/b/c/f1l1
touch $SCRATCH_MNT/a/b/f2
mkdir $SCRATCH_MNT/d
mv $SCRATCH_MNT/a/b/c/f1l1 $SCRATCH_MNT/d/f1l1_2
ln $SCRATCH_MNT/a/b/f2 $SCRATCH_MNT/a/f2l1
ln $SCRATCH_MNT/a/b/f2 $SCRATCH_MNT/d/f2l2
mv $SCRATCH_MNT/a/f1 $SCRATCH_MNT/d/f1_2
# Filesystem looks like:
#
# . (ino 256)
# |---- a/ (ino 257)
# | |---- b/ (ino 259)
# | | |---- c/ (ino 260)
# | | |---- f2 (ino 261)
# | |
# | |---- f2l1 (ino 261)
# |
# |---- d/ (ino 262)
# |---- f1l1_2 (ino 258)
# |---- f2l2 (ino 261)
# |---- f1_2 (ino 258)
#
$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
$SCRATCH_MNT/mysnap1 > /dev/null
$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
$SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch
mv $SCRATCH_MNT/d $SCRATCH_MNT/a/b/d2
mv $SCRATCH_MNT/a/f2l1 $SCRATCH_MNT/d
mkdir $SCRATCH_MNT/a/f2l1
ln $SCRATCH_MNT/a/b/d2/f1_2 $SCRATCH_MNT/a/b/f1l2
mv $SCRATCH_MNT/a/b $SCRATCH_MNT/a/f2l1/b2
mv $SCRATCH_MNT/a/f2l1/b2/d2 $SCRATCH_MNT/a/f2l1/b2/c/d3
mv $SCRATCH_MNT/a/f2l1/b2/c/d3/f2l2 $SCRATCH_MNT/a/f2l1/b2/c/d3/f2l2_2
# Filesystem now looks like:
#
# . (ino 256)
# |---- a/ (ino 257)
# | |---- f2l1/ (ino 263)
# | |---- b2/ (ino 259)
# | |---- c/ (ino 260)
# | | |---- d3 (ino 262)
# | | |---- f1l1_2 (ino 258)
# | | |---- f2l2_2 (ino 261)
# | | |---- f1_2 (ino 258)
# | |
# | |---- f2 (ino 261)
# | |---- f1l2 (ino 258)
# |
# |---- d (ino 261)
#
$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
$SCRATCH_MNT/mysnap2 > /dev/null
$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
$SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch
$FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
$FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
-x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
# Now recreate the filesystem by receiving both send streams and verify we get
# the same content that the original filesystem had.
_scratch_unmount
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
# The incremental send operation below used to issue an unlink operation for the
# path "d/f2l1" after it orphanized inode 262 (renamed it to o262-7-0) and after
# it created the link named "d" for inode 261, which made the receiver fail on
# the unlink operation with error code ENOTDIR. That unlink operation should
# have had the path "o262-7-0/f2l2" instead.
$BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
$FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
$FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
status=0
exit
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