4 # Test overhead & df output for extN filesystems
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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
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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 echo "QA output created by $seq"
29 status=1 # failure is the default!
30 trap "_cleanup; exit \$status" 0 1 2 3 15
38 # get standard environment, filters and checks
42 # real QA test starts here
44 # Modify as appropriate.
45 _supported_fs ext2 ext3 ext4
51 _scratch_mkfs >> $seq.full 2>&1
53 # Get the honest truth about block counts straight from metadata on disk
54 TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
55 | awk '/Block count:/{print $3}'`
57 FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
58 | awk '/Free blocks:/{print $3}'`
60 # ext3 doesn't count journal blocks as overhead, ext4 does.
61 if [ $FSTYP = "ext3" ]; then
62 JOURNAL_SIZE=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
63 | awk '/Journal size:/{print $3}' | _filter_size_to_bytes`
64 BLOCK_SIZE=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
65 | awk '/Block size:/{print $3}'`
66 JOURNAL_BLOCKS=$(($JOURNAL_SIZE/$BLOCK_SIZE))
71 OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS-$JOURNAL_BLOCKS))
74 # Set the behaviour for the statfs system call. The minixdf
75 # behaviour is to return in the f_blocks field the total number of
76 # blocks of the filesystem, while the bsddf behaviour (which is
77 # the default) is to subtract the overhead blocks used by the ext2
78 # filesystem and not available for file storage.
80 # stat -f output looks like this; we get f_blocks from that, which
81 # varies depending on the df mount options used below:
84 # ID: affc5f2b2f57652 Namelen: 255 Type: ext2/ext3
85 # Block size: 4096 Fundamental block size: 4096
86 # Blocks: Total: 5162741 Free: 5118725 Available: 4856465
87 # Inodes: Total: 1313760 Free: 1313749
89 _scratch_mount "-o minixdf"
90 MINIX_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
93 _scratch_mount "-o bsddf"
94 BSD_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
97 # Echo data to $seq.full for analysis
98 echo "Overhead is $OVERHEAD blocks out of $TOTAL_BLOCKS ($FREE_BLOCKS free)" >> $seq.full
99 echo "MINIX free blocks $MINIX_F_BLOCKS" >> $seq.full
100 echo "BSD free blocks $BSD_F_BLOCKS" >> $seq.full
102 # minix should be exactly equal (hence tolerance of 0)
103 _within_tolerance "minix f_blocks" $MINIX_F_BLOCKS $TOTAL_BLOCKS 0 -v
104 # bsd should be within ... we'll say 1% for some slop
105 _within_tolerance "bsd f_blocks" $BSD_F_BLOCKS $(($TOTAL_BLOCKS-$OVERHEAD)) 1% -v