qemu-e2k/tests/qemu-iotests/172
Markus Armbruster 6172e067a4 fdc: Reject clash between -drive if=floppy and -global isa-fdc
The floppy controller devices desugar their drive properties into
floppy devices (since commit a92bd191a4 "fdc: Move qdev properties to
FloppyDrive", v2.8.0).  This involves some bad magic in
fdctrl_connect_drives(), and exists for backward compatibility.

The functions for boards to create floppy controller devices
fdctrl_init_isa(), fdctrl_init_sysbus(), and sun4m_fdctrl_init()
desugar -drive if=floppy to these floppy controller drive properties.

If you use both -drive if=floppy (or its -fda / -fdb sugar) and
-global isa-fdc for the same floppy device, -global silently loses the
conflict, and both backends involved end up with the floppy device
frontend attached, as demonstrated by iotest 172 (see commit before
previous).  This is wrong.

Desugar -drive if=floppy straight to floppy devices instead, with
helper fdctrl_init_drives().  The conflict now gets rejected cleanly:
first, fdctrl_connect_drives() creates the floppy for the controller's
property, then fdctrl_init_drives() attempts to create the floppy for
-drive if=floppy, but fails because the unit is already in use.

Output of iotest 172 changes in three ways:

1. The clash gets rejected.

2. In one test case, "info qtree" has the floppy devices swapped, and
   "info block" has their QOM paths swapped.  This is because the
   floppy device for -fda now gets created after the one for -global
   isa-fdc.driveB.

3. The error message for -global floppy.drive=floppy0 changes.  Before
   the patch, we set isa-fdc.driveA to -fda's block backend, then
   create the floppy device for it, then move the backend from
   isa-fdc.driveA to floppy.drive.  Floppy creation fails when
   applying -global floppy.drive=floppy0, because floppy0 is still
   attached to isa-fdc.  After the patch, we create the floppy for
   -fda, then set its drive property to floppy0.  Now floppy creation
   succeeds, but setting the drive property fails, because -global
   already set it.  Yes, this is exasperatingly complicated.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200622094227.1271650-5-armbru@redhat.com>
2020-06-23 16:07:07 +02:00

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#!/usr/bin/env bash
#
# Test floppy configuration
#
# Copyright (C) 2016 Red Hat, Inc.
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
#
# creator
owner=kwolf@redhat.com
seq=`basename $0`
echo "QA output created by $seq"
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
_rm_test_img "$TEST_IMG.2"
_rm_test_img "$TEST_IMG.3"
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt qcow2
_supported_proto file
_supported_os Linux
if [ "$QEMU_DEFAULT_MACHINE" != "pc" ]; then
_notrun "Requires a PC machine"
fi
do_run_qemu()
{
(
if ! test -t 0; then
while read cmd; do
echo $cmd
done
fi
echo quit
) | $QEMU -accel qtest -nographic -monitor stdio -serial none "$@"
echo
}
check_floppy_qtree()
{
echo
echo Testing: "$@" | _filter_testdir
# QEMU_OPTIONS contains -nodefaults, we don't want that here because the
# defaults are part of what should be checked here.
#
# Apply the sed filter to stdout only, but keep the stderr output and
# filter the qemu program name in it.
printf "info qtree\ninfo block\n" |
(QEMU_OPTIONS="" do_run_qemu "$@" |
_filter_testdir |_filter_generated_node_ids | _filter_hmp |
sed -ne '/^ dev: isa-fdc/,/^ dev:/{x;p};/^[a-z][^ ]* (NODE_NAME):* /,/^(qemu)$/{p}') 2>&1 |
_filter_win32 | _filter_qemu
}
check_cache_mode()
{
echo "info block none0" |
QEMU_OPTIONS="" do_run_qemu -drive if=none,file="$TEST_IMG" "$@" |
_filter_win32 | _filter_qemu | grep "Cache mode"
}
size=720k
_make_test_img $size
TEST_IMG="$TEST_IMG.2" _make_test_img $size
TEST_IMG="$TEST_IMG.3" _make_test_img $size
# Default drive semantics:
#
# By default you get a single empty floppy drive. You can override it with
# -drive and using the same index, but if you use -drive to add a floppy to a
# different index, you get both of them. However, as soon as you use any
# '-device floppy', even to a different slot, the default drive is disabled.
echo
echo
echo === Default ===
check_floppy_qtree
echo
echo
echo === Using -fda/-fdb options ===
check_floppy_qtree -fda "$TEST_IMG"
check_floppy_qtree -fdb "$TEST_IMG"
check_floppy_qtree -fda "$TEST_IMG" -fdb "$TEST_IMG.2"
check_floppy_qtree -fdb ""
echo
echo
echo === Using -drive options ===
check_floppy_qtree -drive if=floppy,file="$TEST_IMG"
check_floppy_qtree -drive if=floppy,file="$TEST_IMG",index=1
check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=floppy,file="$TEST_IMG.2",index=1
echo
echo
echo === Using -drive if=none and -global ===
check_floppy_qtree -drive if=none,file="$TEST_IMG" -global isa-fdc.driveA=none0
check_floppy_qtree -drive if=none,file="$TEST_IMG" -global isa-fdc.driveB=none0
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveA=none0 -global isa-fdc.driveB=none1
echo
echo
echo === Using -drive if=none and -device ===
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,unit=1
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-device floppy,drive=none0 -device floppy,drive=none1,unit=1
echo
echo
echo === Mixing -fdX and -global ===
# Working
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveB=none0
check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveA=none0
# Conflicting
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveA=none0
check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global isa-fdc.driveB=none0
# Conflicting, -fdX wins
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -global floppy.drive=none0
echo
echo
echo === Mixing -fdX and -device ===
# Working
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=1
check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0
check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=0
# Conflicting
check_floppy_qtree -fda "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=0
check_floppy_qtree -fdb "$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=1
echo
echo
echo === Mixing -drive and -device ===
# Working
check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0
check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=1
# Conflicting
check_floppy_qtree -drive if=floppy,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" -device floppy,drive=none0,unit=0
echo
echo
echo === Mixing -global and -device ===
# Working
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveA=none0 -device floppy,drive=none1
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=1
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveB=none0 -device floppy,drive=none1
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=0
check_floppy_qtree -drive if=none,file="$TEST_IMG" \
-global floppy.drive=none0 -device floppy,unit=0
# Conflicting
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=0
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=1
check_floppy_qtree -drive if=none,file="$TEST_IMG" -drive if=none,file="$TEST_IMG.2" \
-global floppy.drive=none0 -device floppy,drive=none1,unit=0
echo
echo
echo === Attempt to use drive twice ===
# if=none
check_floppy_qtree -drive if=none -device floppy,drive=none0 -device floppy -device floppy,drive=none0
check_floppy_qtree -drive if=none -global floppy.drive=none0 -device floppy -device floppy
# if=floppy
check_floppy_qtree -fda "" -device floppy,drive=floppy0
check_floppy_qtree -fda "" -global floppy.drive=floppy0
# default if=floppy (not found, because it's created later)
check_floppy_qtree -device floppy,drive=floppy0
echo
echo
echo === Too many floppy drives ===
# Working
check_floppy_qtree -drive if=floppy,file="$TEST_IMG" \
-drive if=none,file="$TEST_IMG.2" \
-drive if=none,file="$TEST_IMG.3" \
-global isa-fdc.driveB=none0 \
-device floppy,drive=none1
echo
echo
echo === Creating an empty drive with anonymous BB ===
check_floppy_qtree -device floppy
check_floppy_qtree -device floppy,drive-type=120
check_floppy_qtree -device floppy,drive-type=144
check_floppy_qtree -device floppy,drive-type=288
echo
echo
echo === Try passing different drive size with image ===
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,drive-type=120
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,drive-type=288
echo
echo
echo === Try passing different block sizes ===
# Explicitly setting the default is okay
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,logical_block_size=512
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,physical_block_size=512
# Changing it is not
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,logical_block_size=4096
check_floppy_qtree -drive if=none,file="$TEST_IMG" -device floppy,drive=none0,physical_block_size=1024
echo
echo
echo === Writethrough caching ===
check_cache_mode -device floppy,drive=none0
check_cache_mode -device floppy,drive=none0,write-cache=on
check_cache_mode -device floppy,drive=none0,write-cache=off
# success, all done
echo "*** done"
rm -f $seq.full
status=0