4 # Test overhead & df output for extN filesystems
6 #-----------------------------------------------------------------------
7 # Copyright (c) 2012 Red Hat, Inc. All Rights Reserved.
9 # This program is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU General Public License as
11 # published by the Free Software Foundation.
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
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20 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #-----------------------------------------------------------------------
25 seqres=$RESULT_DIR/$seq
26 echo "QA output created by $seq"
30 status=1 # failure is the default!
31 trap "_cleanup; exit \$status" 0 1 2 3 15
39 # get standard environment, filters and checks
43 # real QA test starts here
45 # Modify as appropriate.
46 _supported_fs ext2 ext3 ext4
52 _scratch_mkfs >> $seqres.full 2>&1
54 # Get the honest truth about block counts straight from metadata on disk
55 TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
56 | awk '/Block count:/{print $3}'`
58 FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
59 | awk '/Free blocks:/{print $3}'`
61 OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS))
64 # Set the behaviour for the statfs system call. The minixdf
65 # behaviour is to return in the f_blocks field the total number of
66 # blocks of the filesystem, while the bsddf behaviour (which is
67 # the default) is to subtract the overhead blocks used by the ext2
68 # filesystem and not available for file storage.
70 # stat -f output looks like this; we get f_blocks from that, which
71 # varies depending on the df mount options used below:
74 # ID: affc5f2b2f57652 Namelen: 255 Type: ext2/ext3
75 # Block size: 4096 Fundamental block size: 4096
76 # Blocks: Total: 5162741 Free: 5118725 Available: 4856465
77 # Inodes: Total: 1313760 Free: 1313749
79 _scratch_mount "-o minixdf"
80 MINIX_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
83 _scratch_mount "-o bsddf"
84 BSD_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
87 # Echo data to $seqres.full for analysis
88 echo "Overhead is $OVERHEAD blocks out of $TOTAL_BLOCKS ($FREE_BLOCKS free)" >> $seqres.full
89 echo "MINIX free blocks $MINIX_F_BLOCKS" >> $seqres.full
90 echo "BSD free blocks $BSD_F_BLOCKS" >> $seqres.full
92 # minix should be exactly equal (hence tolerance of 0)
93 _within_tolerance "minix f_blocks" $MINIX_F_BLOCKS $TOTAL_BLOCKS 0 -v
94 # bsd should be within ... we'll say 1% for some slop
95 _within_tolerance "bsd f_blocks" $BSD_F_BLOCKS $(($TOTAL_BLOCKS-$OVERHEAD)) 1% -v