xfstests 285: verify extN statfs f_blocks

1/1

new file mode 100755
index 0000000..cda8531
@@ -0,0 +1,97 @@
+#! /bin/bash
+# FS QA Test No. 286
+#
+# Test overhead & df output for extN filesystems
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2012 Red Hat, Inc.  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
[email protected]
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs ext2 ext3 ext4
+_supported_os Linux
+_require_scratch
+
+rm -f $seq.full
+
+_scratch_mkfs >> $seq.full 2>&1
+
+TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
+		| awk '/Block count:/{print $3}'`
+
+FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
+		| awk '/Free blocks:/{print $3}'`
+
+# nb: kernels today don't count journal blocks  as overhead, but should.
+# For most fileystems this will still be within tolerance.
+OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS))
+
+#  bsddf|minixdf
+#         Set the behaviour  for  the  statfs  system  call.  The  minixdf
+#         behaviour is to return in the f_blocks field the total number of
+#         blocks of the filesystem, while the bsddf  behaviour  (which  is
+#         the default) is to subtract the overhead blocks used by the ext2
+#         filesystem and not available for file storage.
+
+# stat -f output looks like; we get f_blocks from that, which
+# varies depending on the df mount options used below:
+
+# Filesystem           4K-blocks      Used Available Use% Mounted on
+# /dev/sda8              2405312   2208933    196379  92% /
+
+_scratch_mount "-o minixdf"
+MINIX_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
+umount $SCRATCH_MNT
+
+_scratch_mount "-o bsddf"
+BSD_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
+umount $SCRATCH_MNT
+
+echo "Overhead is $OVERHEAD out of $TOTAL_BLOCKS" >> $seq.full
+echo "BSD blocks $BSD_F_BLOCKS" >> $seq.full
+echo "MINIX blocks $MINIX_F_BLOCKS" >> $seq.full
+
+# minix should be exactly equal (hence 0)
+_within_tolerance "minix f_blocks" $MINIX_F_BLOCKS $TOTAL_BLOCKS 0 -v
+# bsd should be within ... we'll say 1%
+_within_tolerance "bsd f_blocks" $BSD_F_BLOCKS $(($TOTAL_BLOCKS-$OVERHEAD)) 1% -v
+
+# success, all done
+status=0
+exit


xfstests 285: verify extN statfs f_blocks

Eric Sandeen

Eryu Guan

Eric Sandeen