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.
13 # This program is distributed in the hope that it would be useful,
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.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write the Free Software Foundation,
20 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #-----------------------------------------------------------------------
24 owner=sandeen@redhat.com
27 echo "QA output created by $seq"
31 status=1 # failure is the default!
32 trap "_cleanup; exit \$status" 0 1 2 3 15
40 # get standard environment, filters and checks
44 # real QA test starts here
46 # Modify as appropriate.
47 _supported_fs ext2 ext3 ext4
53 _scratch_mkfs >> $seq.full 2>&1
55 # Get the honest truth about block counts straight from metadata on disk
56 TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
57 | awk '/Block count:/{print $3}'`
59 FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
60 | awk '/Free blocks:/{print $3}'`
62 # nb: kernels today don't count journal blocks as overhead, but should.
63 # For most filesystems this will still be within tolerance.
64 # Overhead is all the blocks (already) used by the fs itself:
65 OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS))
68 # Set the behaviour for the statfs system call. The minixdf
69 # behaviour is to return in the f_blocks field the total number of
70 # blocks of the filesystem, while the bsddf behaviour (which is
71 # the default) is to subtract the overhead blocks used by the ext2
72 # filesystem and not available for file storage.
74 # stat -f output looks like this; we get f_blocks from that, which
75 # varies depending on the df mount options used below:
78 # ID: affc5f2b2f57652 Namelen: 255 Type: ext2/ext3
79 # Block size: 4096 Fundamental block size: 4096
80 # Blocks: Total: 5162741 Free: 5118725 Available: 4856465
81 # Inodes: Total: 1313760 Free: 1313749
83 _scratch_mount "-o minixdf"
84 MINIX_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
87 _scratch_mount "-o bsddf"
88 BSD_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
91 # Echo data to $seq.full for analysis
92 echo "Overhead is $OVERHEAD blocks out of $TOTAL_BLOCKS ($FREE_BLOCKS free)" >> $seq.full
93 echo "MINIX free blocks $MINIX_F_BLOCKS" >> $seq.full
94 echo "BSD free blocks $BSD_F_BLOCKS" >> $seq.full
96 # minix should be exactly equal (hence tolerance of 0)
97 _within_tolerance "minix f_blocks" $MINIX_F_BLOCKS $TOTAL_BLOCKS 0 -v
98 # bsd should be within ... we'll say 1% for some slop
99 _within_tolerance "bsd f_blocks" $BSD_F_BLOCKS $(($TOTAL_BLOCKS-$OVERHEAD)) 1% -v