[PATCH 1/3] 263: Functional test case for the btrfs snapshot

Anand Jain
2011-10-12T04:50:09Z

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>
---
263 | 192 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
263.out | 2 +
README | 7 ++-
common.config | 14 ++++
common.rc | 122 ++++++++++++++++++++++++++++++++++++
group | 1 +
6 files changed, 337 insertions(+), 1 deletions(-)
create mode 100755 263
create mode 100644 263.out

diff --git a/263 b/263
new file mode 100755
index 0000000..f26a677
--- /dev/null
+++ b/263
@@ -0,0 +1,192 @@
+#!/bin/bash
+# FS QA Test No. 263
+#
+# Extented btrfs snapshot test cases
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2011 Oracle All Rights Reserved.
+#
+# 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
+#
+#-----------------------------------------------------------------------
+#
+# creator
+owner=anand.jain@oracle.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+
+_cleanup()
+{
+ rm -f $tmp.*
+}
+
+trap "_cleanup ; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_need_to_be_root
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+
+_scratch_mkfs $SCRATCH_DEV_POOL > /dev/null 2>&1 || _fail "mkfs failed"
+_scratch_mount
+
+# Create and save sha256sum
+# arg1 FS to generate sha256
+# arg2 File name to save the sha256 output
+_save_checksum()
+{
+ local i=0
+ >$2
+ cd $1
+ for i in `find . -type f`; do sha256sum $i >> $2; done
+ cd $OLDPWD
+}
+
+# Verify the sha256sum for a FS
+# arg1 FS to be tested
+# arg2 sha256 file
+_verify_checksum()
+{
+ cd $1
+ [ -f $2 ] || _fail "checksum file $2 not found"
+ sha256sum -c $2 | grep "FAILED"
+ cd $OLDPWD
+}
+
+# Create a snapshot
+# arg1 dest dir
+# Return snapshot name in the SNAPNAME
+_create_snap()
+{
+ local x
+ [ -d $1 ] || _fail "Destination dir $1 not present"
+ SNAPNAME=`mktemp -u $SCRATCH_MNT/snap.XXXXXX`
+ btrfs subvolume snapshot $1 $SNAPNAME > /dev/null || _fail "snapshot create failed"
+}
+
+# Reads and writes new data but does not allocate new blocks
+# arg1 FS to be modified
+_read_modify_write()
+{
+ local i
+ local FSIZE
+ for i in `find $1 -type f`
+ do
+ FSIZE=`stat -t $i | cut -d" " -f2`
+ dd if=$i of=/dev/null obs=$FSIZE count=1 status=noxfer 2>/dev/null &
+ dd if=/dev/urandom of=$i obs=$FSIZE count=1 status=noxfer 2>/dev/null &
+ done
+ wait $!
+}
+
+# Fills the allocated blocks
+# arg1 FS in question
+_fill_blk()
+{
+ local FSIZE
+ local BLKS
+ local NBLK
+ local FALLOC
+ local WS
+
+ for i in `find /$1 -type f`
+ do
+ FSIZE=`stat -t $i | cut -d" " -f2`
+ BLKS=`stat -c "%B" $i`
+ NBLK=`stat -c "%b" $i`
+ FALLOC=$(($BLKS * $NBLK))
+ WS=$(($FALLOC - $FSIZE))
+ dd if=/dev/urandom of=$i oseek=$FSIZE obs=$WS count=1 status=noxfer 2>/dev/null &
+ done
+ wait $!
+}
+
+
+# Append a random size to the files
+# arg1 : FS in question
+_append_file()
+{
+ local FSIZE
+ local X
+ local N
+ local i
+ N=0
+ for i in `find $1 -type f`
+ do
+ if [ $N == 0 ]; then
+ X=$i
+ FSIZE=`stat -t $X | cut -d" " -f2`
+ dd if=$X of=$X seek=1 bs=$FSIZE obs=$FSIZE count=1 status=noxfer 2>/dev/null &
+ N=$(($N+1))
+ continue
+ fi
+ FSIZE=`stat -t $i | cut -d" " -f2`
+ dd if=$X of=$i seek=1 bs=$FSIZE obs=$FSIZE count=1 status=noxfer 2>/dev/null &
+ X=$i
+ done
+ wait $!
+}
+
+##################### real QA test starts here###################################
+# sv1 - is just a name nothing spl
+firstvol="$SCRATCH_MNT/sv1"
+btrfs subvolume create $firstvol > /dev/null || _fail "btrfs subvolume create $firstvol failed"
+_fillfs 1 10 100 4096 8192 $firstvol
+SNAPNAME=0
+_create_snap $firstvol
+_save_checksum $firstvol $tmp.sv1.sum
+_verify_checksum $SNAPNAME $tmp.sv1.sum
+
+#Append1 the files
+_fill_blk $SNAPNAME
+_verify_checksum $firstvol $tmp.sv1.sum
+
+#Append2 the files
+_append_file $SNAPNAME
+_verify_checksum $firstvol $tmp.sv1.sum
+
+#read modify write
+_read_modify_write $SNAPNAME
+_verify_checksum $firstvol $tmp.sv1.sum
+
+#nested snapshot test
+src_vol=$firstvol
+for i in `seq 1 7`; do
+ SNAPNAME=0
+ _create_snap $src_vol
+ _verify_checksum $SNAPNAME $tmp.sv1.sum
+ src_vol=$SNAPNAME
+done
+
+# file delete test
+SNAPNAME=0
+_create_snap $firstvol
+tname=`echo $SNAPNAME | rev | cut -d"/" -f1 | rev`
+_save_checksum $SNAPNAME $tmp.$tname.sum
+\rm -rf $firstvol/*
+_verify_checksum $SNAPNAME $tmp.$tname.sum
+
+umount $SCRATCH_DEV || _fail "unmount failed"
+
+echo "Silence is golden"
+status=0; exit
diff --git a/263.out b/263.out
new file mode 100644
index 0000000..7a26e35
--- /dev/null
+++ b/263.out
@@ -0,0 +1,2 @@
+QA output created by 263
+Silence is golden
diff --git a/README b/README
index 5367be6..7c135c7 100644
--- a/README
+++ b/README
@@ -36,12 +36,17 @@ Preparing system for tests (IRIX and Linux):
not be run.

(these must be two DIFFERENT partitions)
+
+ - for btrfs only: some tests would need 3 or more independent SCRATCH disks,
+ which should be setenv SCRATCH_DEV_POOL instead of SCRATCH_DEV
+

- setup your environment
- setenv TEST_DEV "device containing TEST PARTITION"
- setenv TEST_DIR "mount point of TEST PARTITION"
- optionally:
- setenv SCRATCH_DEV "device containing SCRATCH PARTITION"
+ - setenv SCRATCH_DEV_POOL "pool of SCRATCH disks for testing btrfs"
- setenv SCRATCH_MNT "mount point for SCRATCH PARTITION"
- setenv TAPE_DEV "tape device for testing xfsdump"
- setenv RMT_TAPE_DEV "remote tape device for testing xfsdump"
@@ -63,7 +68,7 @@ Preparing system for tests (IRIX and Linux):
tape which can be overwritten.

- make sure $TEST_DEV is a mounted XFS partition
- - make sure that $SCRATCH_DEV contains nothing useful
+ - make sure that $SCRATCH_DEV or $SCRATCH_DEV_POOL contains nothing useful

Running tests:

diff --git a/common.config b/common.config
index e94624e..4212fc8 100644
--- a/common.config
+++ b/common.config
@@ -229,6 +229,20 @@ if [ ! -d "$TEST_DIR" ]; then
exit 1
fi

+# a btrfs tester will set only SCRATCH_DEV_POOL, we will put first of its dev
+# to SCRATCH_DEV and rest to SCRATCH_DEV_POOL to maintain the backward compatibility
+if [ "$HOSTOS" == "Linux" ]; then
+ FSTYP_tmp=`blkid -c /dev/null -s TYPE -o value $TEST_DEV`
+else
+ FSTYP_tmp=xfs
+fi
+if [ "$FSTYP_tmp" == "btrfs" ]; then
+ if [ ! -z "$SCRATCH_DEV_POOL" ]; then
+ SCRATCH_DEV=`echo $SCRATCH_DEV_POOL | cut -d" " -f 1`
+ SCRATCH_DEV_POOL=`echo $SCRATCH_DEV_POOL | cut -d" " -f 2-`
+ fi
+fi
+
echo $SCRATCH_DEV | grep -q ":" > /dev/null 2>&1
if [ ! -z "$SCRATCH_DEV" -a ! -b "$SCRATCH_DEV" -a "$?" != "0" ]; then
echo "common.config: Error: \$SCRATCH_DEV ($SCRATCH_DEV) is not a block device or a NFS filesystem"
diff --git a/common.rc b/common.rc
index e948169..861f1f8 100644
--- a/common.rc
+++ b/common.rc
@@ -1591,6 +1591,128 @@ _test_inode_extsz()
echo $blocks
}

+# scratch_dev_pool should contain the disks pool for the btrfs raid
+_require_scratch_dev_pool()
+{
+ local i
+ case "$FSTYP" in
+ btrfs)
+ if [ -z "$SCRATCH_DEV_POOL" ]
+ then
+ _notrun "this test requires a valid \$SCRATCH_DEV_POOL"
+ fi
+ if [ "`echo $SCRATCH_DEV_POOL|wc -w`" -lt 2 ]
+ then
+ _notrun "this test needs 2 or more disks in SCRATCH_DEV_POOL"
+ fi
+
+ for i in $SCRATCH_DEV_POOL
+ do
+ if [ "`_is_block_dev $i`" = "" ]
+ then
+ _notrun "this test requires valid block disk $i"
+ fi
+ if [ "`_is_block_dev $i`" = "`_is_block_dev $TEST_DEV`" ]
+ then
+ _notrun "$i is part of TEST_DEV, this test requires unique disks"
+ fi
+ if [ "`_is_block_dev $i`" = "`_is_block_dev $SCRATCH_DEV`" ]
+ then
+ _notrun "$i is part of SCRATCH_DEV, this test requires unique disks"
+ fi
+ if _mount | grep -q $i
+ then
+ if ! $UMOUNT_PROG $i
+ then
+ echo "failed to unmount $i - aborting"
+ exit 1
+ fi
+ fi
+ dd if=/dev/zero of=$i bs=4096 count=100 > /dev/null 2>&1
+ done
+ ;;
+ esac
+}
+
+# We will check if the device is virtual (eg: loop device) since it does not
+# have the delete entry-point. Otherwise SCSI and USB devices are fine.
+_require_deletable_scratch_dev_pool()
+{
+ local i
+ local x
+ for i in $SCRATCH_DEV_POOL; do
+ x=`echo $i | cut -d"/" -f 3`
+ ls -l /sys/class/block/${x} | grep -q "virtual"
+ if [ $? == "0" ]; then
+ _notrun "$i is a virtual device which is not deletable"
+ fi
+ done
+}
+
+# Generate Random number in a range
+# arg1 min, arg2 max
+_rand_range()
+{
+ local X
+ local Y
+ if [ $2 == 0 ]; then echo 0; return; fi
+ RANDOM=1
+ Y=$RANDOM
+ ((X = $2 - $1 + 1))
+ ((X = $Y % $X))
+ ((X = $X + $1))
+ echo $X
+}
+
+# Create Dir tree and files in it.
+# arg1 basedir
+# arg2 dir depth
+# arg3 nfile_min
+# arg4 nfile_max
+# arg5 fsize_min
+# arg6 fsize_max
+_fillfs()
+{
+ umask 000
+ local j
+ local i
+ local DIRP
+ local FCNT
+ local FILEP
+ local SCNT
+ local BCNT
+ DIRP=$6
+ for ((j=0; j<$1; j++)); do
+ DIRP=`mktemp -dq $DIRP/dir.XXXXXX`
+ FCNT=$(_rand_range $2 $3)
+ for ((i=0; i<$FCNT; i++)); do
+ FILEP=`mktemp -q $DIRP/file.XXXXXX`
+ SCNT=$(_rand_range $4 $5)
+ dd if=/dev/urandom of=$FILEP bs=$SCNT count=1 status=noxfer 2>/dev/null &
+ done
+ done
+ wait $!
+}
+
+# arg 1 is dev to remove and is output of the below eg.
+# ls -l /sys/class/block/sdd | rev | cut -d "/" -f 3 | rev
+_devmgt_remove()
+{
+ echo 1 > /sys/class/scsi_device/${1}/device/delete || _fail "Remove disk failed"
+}
+
+# arg 1 is dev to add and is output of the below eg.
+# ls -l /sys/class/block/sdd | rev | cut -d "/" -f 3 | rev
+_devmgt_add()
+{
+ local h
+ local tdl
+ # arg 1 will be in h:t:d:l format now in the h and "t d l" format
+ h=`echo ${1} | cut -d":" -f 1`
+ tdl=`echo ${1} | cut -d":" -f 2-|sed 's/:/ /g'`
+
+ echo ${tdl} > /sys/class/scsi_host/host${h}/scan || _fail "Add disk failed"
+}

################################################################################

diff --git a/group b/group
index 17466a1..d86624f 100644
--- a/group
+++ b/group
@@ -376,3 +376,4 @@ deprecated
260 auto quick trim
261 auto quick quota
262 auto quick quota
+263 auto quick
--
1.7.7