2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2012 Red Hat, Inc. All Rights Reserved.
7 # Test overhead & df output for extN filesystems
10 seqres=$RESULT_DIR/$seq
11 echo "QA output created by $seq"
15 status=1 # failure is the default!
16 trap "_cleanup; exit \$status" 0 1 2 3 15
24 # get standard environment, filters and checks
28 # real QA test starts here
30 # Modify as appropriate.
31 _supported_fs ext2 ext3 ext4
37 _scratch_mkfs >> $seqres.full 2>&1
39 # Get the honest truth about block counts straight from metadata on disk
40 TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
41 | awk '/Block count:/{print $3}'`
43 FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
44 | awk '/Free blocks:/{print $3}'`
46 OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS))
49 # Set the behaviour for the statfs system call. The minixdf
50 # behaviour is to return in the f_blocks field the total number of
51 # blocks of the filesystem, while the bsddf behaviour (which is
52 # the default) is to subtract the overhead blocks used by the ext2
53 # filesystem and not available for file storage.
55 # stat -f output looks like this; we get f_blocks from that, which
56 # varies depending on the df mount options used below:
59 # ID: affc5f2b2f57652 Namelen: 255 Type: ext2/ext3
60 # Block size: 4096 Fundamental block size: 4096
61 # Blocks: Total: 5162741 Free: 5118725 Available: 4856465
62 # Inodes: Total: 1313760 Free: 1313749
64 _scratch_mount "-o minixdf"
65 MINIX_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
68 _scratch_mount "-o bsddf"
69 BSD_F_BLOCKS=`stat -f $SCRATCH_MNT | awk '/^Blocks/{print $3}'`
72 # Echo data to $seqres.full for analysis
73 echo "Overhead is $OVERHEAD blocks out of $TOTAL_BLOCKS ($FREE_BLOCKS free)" >> $seqres.full
74 echo "MINIX free blocks $MINIX_F_BLOCKS" >> $seqres.full
75 echo "BSD free blocks $BSD_F_BLOCKS" >> $seqres.full
77 # minix should be exactly equal (hence tolerance of 0)
78 _within_tolerance "minix f_blocks" $MINIX_F_BLOCKS $TOTAL_BLOCKS 0 -v
79 # bsd should be within ... we'll say 1% for some slop
80 _within_tolerance "bsd f_blocks" $BSD_F_BLOCKS $(($TOTAL_BLOCKS-$OVERHEAD)) 1% -v