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[PATCH 3/5] 264: Functional test case for the btrfs snapshot

To: hch@xxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: [PATCH 3/5] 264: Functional test case for the btrfs snapshot
From: Anand Jain <Anand.Jain@xxxxxxxxxx>
Date: Thu, 20 Oct 2011 23:41:20 +0800
Cc: Anand Jain <Anand.Jain@xxxxxxxxxx>
In-reply-to: <1319125282-17062-1-git-send-email-Anand.Jain@xxxxxxxxxx>
References: <1318919336-32206-1-git-send-email-Anand.Jain@xxxxxxxxxx> <1319125282-17062-1-git-send-email-Anand.Jain@xxxxxxxxxx>
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@xxxxxxxxxx>
---
 264     |  193 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 264.out |    2 +
 group   |    1 +
 3 files changed, 196 insertions(+), 0 deletions(-)
 create mode 100755 264
 create mode 100644 264.out

diff --git a/264 b/264
new file mode 100755
index 0000000..d655d1e
--- /dev/null
+++ b/264
@@ -0,0 +1,193 @@
+#!/bin/bash
+# FS QA Test No. 264
+#
+# 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@xxxxxxxxxx
+
+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"
+dirp=`mktemp -duq $firstvol/dir.XXXXXX`
+_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10 -x
+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/264.out b/264.out
new file mode 100644
index 0000000..eca790b
--- /dev/null
+++ b/264.out
@@ -0,0 +1,2 @@
+QA output created by 264
+Silence is golden
diff --git a/group b/group
index 2a8970c..d2abe42 100644
--- a/group
+++ b/group
@@ -377,3 +377,4 @@ deprecated
 261 auto quick quota
 262 auto quick quota
 263 rw auto quick
+264 auto
-- 
1.7.7

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