common/xfs: wipe the XFS superblock of each AGs

[xfstests-dev.git] / common / xfs

diff --git a/common/xfs b/common/xfs
index 1bce3c18f58742c5b1681f0f0dc03f3a97272c9f..706ddf8511d0d19691e0d02009ec2ac473cad03c 100644 (file)
--- a/common/xfs
+++ b/common/xfs
@@ -884,3 +884,43 @@ _xfs_mount_agcount()
 {
        $XFS_INFO_PROG "$1" | grep agcount= | sed -e 's/^.*agcount=\([0-9]*\),.*$/\1/g'
 }
+
+# Wipe the superblock of each XFS AGs
+_try_wipe_scratch_xfs()
+{
+       local num='^[0-9]+$'
+       local agcount
+       local agsize
+       local dbsize
+
+       # Try to wipe each SB if there's an existed XFS
+       agcount=`_scratch_xfs_get_sb_field agcount 2>/dev/null`
+       agsize=`_scratch_xfs_get_sb_field agblocks 2>/dev/null`
+       dbsize=`_scratch_xfs_get_sb_field blocksize 2>/dev/null`
+       if [[ $agcount =~ $num && $agsize =~ $num && $dbsize =~ $num ]];then
+               for ((i = 0; i < agcount; i++)); do
+                       $XFS_IO_PROG -c "pwrite $((i * dbsize * agsize)) $dbsize" \
+                               $SCRATCH_DEV >/dev/null;
+               done
+       fi
+
+       # Try to wipe each SB by default mkfs.xfs geometry
+       local tmp=`mktemp -u`
+       unset agcount agsize dbsize
+       _scratch_mkfs_xfs -N 2>/dev/null | perl -ne '
+               if (/^meta-data=.*\s+agcount=(\d+), agsize=(\d+) blks/) {
+                       print STDOUT "agcount=$1\nagsize=$2\n";
+               }
+               if (/^data\s+=\s+bsize=(\d+)\s/) {
+                       print STDOUT "dbsize=$1\n";
+               }' > $tmp.mkfs
+
+       . $tmp.mkfs
+       if [[ $agcount =~ $num && $agsize =~ $num && $dbsize =~ $num ]];then
+               for ((i = 0; i < agcount; i++)); do
+                       $XFS_IO_PROG -c "pwrite $((i * dbsize * agsize)) $dbsize" \
+                               $SCRATCH_DEV >/dev/null;
+               done
+       fi
+       rm -f $tmp.mkfs
+}