| #! /bin/bash | |
| # FS QA Test No. 205 | |
| # | |
| # Test out ENOSPC flushing on small filesystems. | |
| # | |
| #----------------------------------------------------------------------- | |
| # Copyright (c) 2009 Dave Chinner | |
| # | |
| # 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 | |
| owner=david@fromorbit.com | |
| seq=`basename $0` | |
| echo "QA output created by $seq" | |
| here=`pwd` | |
| tmp=/tmp/$$ | |
| status=1 # failure is the default! | |
| # get standard environment, filters and checks | |
| . ./common.rc | |
| . ./common.filter | |
| # real QA test starts here | |
| _supported_fs xfs | |
| _supported_os Linux | |
| _require_scratch | |
| _scratch_mkfs_xfs -d size=16m -b size=512 >/dev/null | |
| _scratch_mount | |
| # fix the reserve block pool to a known size so that the enospc calculations | |
| # work out correctly. | |
| _scratch_resvblks 1024 > $seq.full 2>&1 | |
| # on a 16MB filesystem, there's 32768x512byte blocks. used is: | |
| # - 4944 in the log, | |
| # - 32+1 for the root inode cluster | |
| # - 4 for the AG header | |
| # - 2 for free space btrees | |
| # - 4 for the AGFL | |
| # - min(%5, 1024) = 1024 blocks for the reserve pool | |
| # - about 15 blocks I can't account for right now. | |
| # That leaves ~26,745 blocks free to use. | |
| # | |
| # Writing the following three files fill the fs almost exactly. | |
| # | |
| # $ df -k /mnt/scratch | |
| # Filesystem 1K-blocks Used Available Use% Mounted on | |
| # /dev/ubdc 13912 13908 4 100% /mnt/scratch | |
| # | |
| dd if=/dev/zero of=$SCRATCH_MNT/fred bs=512 count=25000 2>&1 | _filter_dd | |
| dd if=/dev/zero of=$SCRATCH_MNT/fred2 bs=512 count=500 2>&1 | _filter_dd | |
| dd if=/dev/zero of=$SCRATCH_MNT/fred3 bs=512 count=245 2>&1 | _filter_dd | |
| rm -f $SCRATCH_MNT/fred* | |
| echo "*** one file" | |
| # now try a single file of that size | |
| dd if=/dev/zero of=$SCRATCH_MNT/fred bs=512 count=26745 2>&1 | _filter_dd | |
| #rm -f $SCRATCH_MNT/fred* | |
| echo "*** one file, a few bytes at a time" | |
| # now try a single file of that size | |
| dd if=/dev/zero of=$SCRATCH_MNT/fred bs=15 count=$[26745/15*512] 2>&1 | _filter_dd | |
| # success, all done | |
| echo "*** done" | |
| rm -f $seq.full | |
| status=0 |