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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Filipe Manana. All Rights Reserved.
#
# FS QA Test No. btrfs/030
#
# Regression test for btrfs' incremental send feature:
#
# 1) Create several nested directories;
# 2) Create a read only snapshot;
# 3) Change the parentship of some of the deepest directories in a reverse
# way, so that parents become children and children become parents;
# 4) Create another read only snapshot and use it for an incremental send
# relative to the first snapshot.
#
# At step 4 btrfs' send entered an infinite loop, increasing the memory it
# used while building path strings until a krealloc was unable to allocate
# more memory, which caused a warning dump in dmesg.
#
. ./common/preamble
_begin_fstest auto quick send
tmp=`mktemp -d`
# Override the default cleanup function.
_cleanup()
{
rm -fr $tmp
}
. ./common/filter
_supported_fs btrfs
_require_scratch
_require_fssum
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
mkdir -p $SCRATCH_MNT/a/b/c
echo "hello" > $SCRATCH_MNT/a/b/c/file.txt
mkdir $SCRATCH_MNT/a/b/c/d
mkdir $SCRATCH_MNT/a/b/c2
mkdir $SCRATCH_MNT/a/b/www
echo "hey" > $SCRATCH_MNT/a/b/foobar.txt
mkdir -p $SCRATCH_MNT/a/b/c3/x/y
mkdir -p $SCRATCH_MNT/a/b/foo1/foo2
echo "hey" > $SCRATCH_MNT/a/b/foo1/foo2/f.txt
mkdir $SCRATCH_MNT/a/b/foo3
mkdir -p $SCRATCH_MNT/a/b/bar1/bar2/bar3/bar4
echo "ola" > $SCRATCH_MNT/a/b/bar1/bar2/bar3/bar4/hello.txt
# Directory tree looks like:
#
# . (ino 256)
# |-- a/ (ino 257)
# |-- b/ (ino 258)
# |-- c/ (ino 259)
# | |-- file.txt (ino 260)
# | |-- d/ (ino 261)
# |
# |-- c2/ (ino 262)
# |-- www/ (ino 263)
# |-- foobar.txt (ino 264)
# |
# |-- c3/ (ino 265)
# | |-- x/ (ino 266)
# | |-- y/ (ino 267)
# |
# |-- foo1/ (ino 268)
# | |---foo2/ (ino 269)
# | |---f.txt (ino 270)
# |
# |-- foo3/ (ino 271)
# |
# |-- bar1/ (ino 272)
# |-- bar2/ (ino 273)
# |-- bar3/ (ino 274)
# |-- bar4 (ino 275)
# |--hello.txt (ino 276)
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
echo " world" >> $SCRATCH_MNT/a/b/c/file.txt
mv $SCRATCH_MNT/a/b/c/d $SCRATCH_MNT/a/b/c2/d2
mv $SCRATCH_MNT/a/b/c $SCRATCH_MNT/a/b/c2/d2/cc
mv $SCRATCH_MNT/a/b/c3/x/y $SCRATCH_MNT/a/b/c2/y2
mv $SCRATCH_MNT/a/b/c3/x $SCRATCH_MNT/a/b/c2/y2/x2
mv $SCRATCH_MNT/a/b/c3 $SCRATCH_MNT/a/b/c2/y2/x2/Z
mv $SCRATCH_MNT/a/b/www $SCRATCH_MNT/a/b/c2/y2/x2/WWW
mv $SCRATCH_MNT/a/b/foobar.txt $SCRATCH_MNT/a/b/c2/y2/x2/qwerty.txt
ln $SCRATCH_MNT/a/b/c2/d2/cc/file.txt $SCRATCH_MNT/a/b/c2/y2/x2/Z/file_link.txt
mv $SCRATCH_MNT/a/b/c2/d2/cc/file.txt $SCRATCH_MNT/a/b/c2/y2/x2
mv $SCRATCH_MNT/a/b/foo3 $SCRATCH_MNT/a/b/foo1/foo33
mv $SCRATCH_MNT/a/b/foo1/foo2 $SCRATCH_MNT/a/b/foo1/foo33/foo22
mv $SCRATCH_MNT/a/b/foo1/foo33/foo22/f.txt \
$SCRATCH_MNT/a/b/foo1/foo33/foo22/fff.txt
echo " hello" >> $SCRATCH_MNT/a/b/bar1/bar2/bar3/bar4/hello.txt
mv $SCRATCH_MNT/a/b/bar1/bar2/bar3/bar4/hello.txt \
$SCRATCH_MNT/a/b/bar1/bar2/bar3/bar4/hello2.txt
mv $SCRATCH_MNT/a/b/bar1/bar2/bar3/bar4 $SCRATCH_MNT/a/b/k44
mv $SCRATCH_MNT/a/b/bar1/bar2/bar3 $SCRATCH_MNT/a/b/k44
mv $SCRATCH_MNT/a/b/bar1/bar2 $SCRATCH_MNT/a/b/k44/bar3
mv $SCRATCH_MNT/a/b/bar1 $SCRATCH_MNT/a/b/k44/bar3/bar2/k11
# Directory tree now looks like:
#
# . (ino 256)
# |-- a/ (ino 257)
# |-- b/ (ino 258)
# |-- c2/ (ino 262)
# | |-- d2/ (ino 261)
# | | |-- cc/ (ino 259)
# | |
# | |-- y2/ (ino 267)
# | |-- x2/ (ino 266)
# | |-- file.txt (ino 260)
# | |-- qwerty.txt (ino 264)
# | |-- WWW/ (ino 263)
# | |-- Z/ (ino 265)
# | |-- file_link.txt
# |
# |-- foo1/ (ino 268)
# | |---foo33/ (ino 271)
# | |---foo22/ (ino 269)
# | |---fff.txt (ino 270)
# |
# |-- k44/ (ino 275)
# |-- hello2.txt (ino 276)
# |-- bar3/ (ino 274)
# |-- bar2/ (ino 273)
# |-- k11/ (ino 272)
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
run_check $FSSUM_PROG -A -f -w $tmp/1.fssum $SCRATCH_MNT/mysnap1
run_check $FSSUM_PROG -A -f -w $tmp/2.fssum -x $SCRATCH_MNT/mysnap2/mysnap1 \
$SCRATCH_MNT/mysnap2
_btrfs send -f $tmp/1.snap $SCRATCH_MNT/mysnap1
_btrfs send -f $tmp/2.snap -p $SCRATCH_MNT/mysnap1 \
$SCRATCH_MNT/mysnap2
_scratch_unmount
_check_btrfs_filesystem $SCRATCH_DEV
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
_btrfs receive -f $tmp/1.snap $SCRATCH_MNT
run_check $FSSUM_PROG -r $tmp/1.fssum $SCRATCH_MNT/mysnap1 2>> $seqres.full
_btrfs receive -f $tmp/2.snap $SCRATCH_MNT
run_check $FSSUM_PROG -r $tmp/2.fssum $SCRATCH_MNT/mysnap2 2>> $seqres.full
_scratch_unmount
_check_btrfs_filesystem $SCRATCH_DEV
status=0
exit
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