119 lines
3.6 KiB
Bash
119 lines
3.6 KiB
Bash
#!/bin/sh
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#
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# Copyright (C) 2009 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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# USA
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#
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function do_io() {
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local op=$1
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local start=$2
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local size=$3
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local step=$4
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local count=$5
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local pattern=$6
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echo === IO: pattern $pattern >&2
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for i in `seq 1 $count`; do
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echo $op -P $pattern $(( start + i * step )) $size
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done
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}
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function io_pattern() {
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do_io $@ | $QEMU_IO $TEST_IMG | _filter_qemu_io
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}
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function io() {
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local start=$2
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local pattern=$(( (start >> 9) % 256 ))
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do_io $@ $pattern | $QEMU_IO $TEST_IMG | _filter_qemu_io
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}
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function io_zero() {
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do_io $@ 0 | $QEMU_IO $TEST_IMG | _filter_qemu_io
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}
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function io_test() {
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local op=$1
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local offset=$2
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# Complete clusters (size = 4k)
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io $op $offset 4096 4096 256
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offset=$((offset + 256 * 4096))
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# From somewhere in the middle to the end of a cluster
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io $op $((offset + 2048)) 2048 4096 256
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offset=$((offset + 256 * 4096))
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# From the start to somewhere in the middle of a cluster
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io $op $offset 2048 4096 256
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offset=$((offset + 256 * 4096))
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# Completely misaligned (and small)
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io $op $((offset + 1024)) 2048 4096 256
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offset=$((offset + 256 * 4096))
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# Spanning multiple clusters
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io $op $((offset + 2048)) 8192 12288 64
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offset=$((offset + 64 * 12288))
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# Spanning multiple L2 tables
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# L2 table size: 512 clusters of 4k = 2M
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io $op $((offset + 2048)) 4194304 4999680 8
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offset=$((offset + 8 * 4999680))
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if false; then
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true
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fi
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}
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function io_test2() {
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local orig_offset=$1
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# Pattern (repeat after 9 clusters):
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# used - used - free - used - compressed - compressed - free - free - compressed
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# Write the clusters to be compressed
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echo === Clusters to be compressed [1]
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io_pattern writev $((offset + 4 * 4096)) 4096 $((9 * 4096)) 256 165
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echo === Clusters to be compressed [2]
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io_pattern writev $((offset + 5 * 4096)) 4096 $((9 * 4096)) 256 165
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echo === Clusters to be compressed [3]
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io_pattern writev $((offset + 8 * 4096)) 4096 $((9 * 4096)) 256 165
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mv $TEST_IMG $TEST_IMG.orig
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$QEMU_IMG convert -f qcow2 -O qcow2 -c $TEST_IMG.orig $TEST_IMG
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# Write the used clusters
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echo === Used clusters [1]
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io_pattern writev $((offset + 0 * 4096)) 4096 $((9 * 4096)) 256 165
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echo === Used clusters [2]
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io_pattern writev $((offset + 1 * 4096)) 4096 $((9 * 4096)) 256 165
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echo === Used clusters [3]
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io_pattern writev $((offset + 3 * 4096)) 4096 $((9 * 4096)) 256 165
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# Read them
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echo === Read used/compressed clusters
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io_pattern readv $((offset + 0 * 4096)) $((2 * 4096)) $((9 * 4096)) 256 165
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io_pattern readv $((offset + 3 * 4096)) $((3 * 4096)) $((9 * 4096)) 256 165
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io_pattern readv $((offset + 8 * 4096)) $((1 * 4096)) $((9 * 4096)) 256 165
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echo === Read zeros
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io_zero readv $((offset + 2 * 4096)) $((1 * 4096)) $((9 * 4096)) 256
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io_zero readv $((offset + 6 * 4096)) $((2 * 4096)) $((9 * 4096)) 256
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}
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