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264: Functional test case for the btrfs snapshot
Create snapshots in various ways, modify the data around the block and file boundaries and verify the data integrity. Signed-off-by: Anand Jain <Anand.Jain@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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Anand Jain
committed by
Christoph Hellwig
Christoph Hellwig
parent
27a067a7ca
commit
c6c8f381b3
@@ -0,0 +1,193 @@
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#!/bin/bash
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# FS QA Test No. 264
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#
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# Extented btrfs snapshot test cases
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2011 Oracle All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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#-----------------------------------------------------------------------
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#
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# creator
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owner=anand.jain@oracle.com
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seq=`basename $0`
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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_cleanup()
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{
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rm -f $tmp.*
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}
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trap "_cleanup ; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_need_to_be_root
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_scratch_mkfs $SCRATCH_DEV_POOL > /dev/null 2>&1 || _fail "mkfs failed"
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_scratch_mount
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# Create and save sha256sum
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# arg1 FS to generate sha256
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# arg2 File name to save the sha256 output
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_save_checksum()
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{
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local i=0
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>$2
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cd $1
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for i in `find . -type f`; do sha256sum $i >> $2; done
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cd $OLDPWD
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}
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# Verify the sha256sum for a FS
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# arg1 FS to be tested
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# arg2 sha256 file
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_verify_checksum()
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{
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cd $1
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[ -f $2 ] || _fail "checksum file $2 not found"
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sha256sum -c $2 | grep "FAILED"
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cd $OLDPWD
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}
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# Create a snapshot
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# arg1 dest dir
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# Return snapshot name in the SNAPNAME
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_create_snap()
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{
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local x
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[ -d $1 ] || _fail "Destination dir $1 not present"
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SNAPNAME=`mktemp -u $SCRATCH_MNT/snap.XXXXXX`
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btrfs subvolume snapshot $1 $SNAPNAME > /dev/null || _fail "snapshot create failed"
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}
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# Reads and writes new data but does not allocate new blocks
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# arg1 FS to be modified
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_read_modify_write()
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{
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local i
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local FSIZE
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for i in `find $1 -type f`
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do
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FSIZE=`stat -t $i | cut -d" " -f2`
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dd if=$i of=/dev/null obs=$FSIZE count=1 status=noxfer 2>/dev/null &
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dd if=/dev/urandom of=$i obs=$FSIZE count=1 status=noxfer 2>/dev/null &
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done
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wait $!
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}
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# Fills the allocated blocks
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# arg1 FS in question
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_fill_blk()
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{
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local FSIZE
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local BLKS
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local NBLK
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local FALLOC
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local WS
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for i in `find /$1 -type f`
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do
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FSIZE=`stat -t $i | cut -d" " -f2`
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BLKS=`stat -c "%B" $i`
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NBLK=`stat -c "%b" $i`
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FALLOC=$(($BLKS * $NBLK))
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WS=$(($FALLOC - $FSIZE))
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dd if=/dev/urandom of=$i oseek=$FSIZE obs=$WS count=1 status=noxfer 2>/dev/null &
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done
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wait $!
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}
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# Append a random size to the files
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# arg1 : FS in question
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_append_file()
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{
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local FSIZE
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local X
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local N
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local i
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N=0
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for i in `find $1 -type f`
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do
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if [ $N == 0 ]; then
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X=$i
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FSIZE=`stat -t $X | cut -d" " -f2`
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dd if=$X of=$X seek=1 bs=$FSIZE obs=$FSIZE count=1 status=noxfer 2>/dev/null &
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N=$(($N+1))
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continue
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fi
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FSIZE=`stat -t $i | cut -d" " -f2`
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dd if=$X of=$i seek=1 bs=$FSIZE obs=$FSIZE count=1 status=noxfer 2>/dev/null &
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X=$i
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done
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wait $!
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}
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##################### real QA test starts here###################################
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# sv1 - is just a name nothing spl
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firstvol="$SCRATCH_MNT/sv1"
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btrfs subvolume create $firstvol > /dev/null || _fail "btrfs subvolume create $firstvol failed"
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dirp=`mktemp -duq $firstvol/dir.XXXXXX`
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_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 -x
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SNAPNAME=0
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_create_snap $firstvol
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_save_checksum $firstvol $tmp.sv1.sum
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_verify_checksum $SNAPNAME $tmp.sv1.sum
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#Append1 the files
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_fill_blk $SNAPNAME
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_verify_checksum $firstvol $tmp.sv1.sum
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#Append2 the files
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_append_file $SNAPNAME
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_verify_checksum $firstvol $tmp.sv1.sum
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#read modify write
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_read_modify_write $SNAPNAME
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_verify_checksum $firstvol $tmp.sv1.sum
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#nested snapshot test
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src_vol=$firstvol
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for i in `seq 1 7`; do
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SNAPNAME=0
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_create_snap $src_vol
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_verify_checksum $SNAPNAME $tmp.sv1.sum
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src_vol=$SNAPNAME
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done
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# file delete test
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SNAPNAME=0
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_create_snap $firstvol
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tname=`echo $SNAPNAME | rev | cut -d"/" -f1 | rev`
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_save_checksum $SNAPNAME $tmp.$tname.sum
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\rm -rf $firstvol/*
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_verify_checksum $SNAPNAME $tmp.$tname.sum
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umount $SCRATCH_DEV || _fail "unmount failed"
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echo "Silence is golden"
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status=0; exit
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