| #! /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 |
