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effd60c878
monitor_qmp_dispatcher_co() runs in the iohandler AioContext that is not
polled during nested event loops. The coroutine currently reschedules
itself in the main loop's qemu_aio_context AioContext, which is polled
during nested event loops. One known problem is that QMP device-add
calls drain_call_rcu(), which temporarily drops the BQL, leading to all
sorts of havoc like other vCPU threads re-entering device emulation code
while another vCPU thread is waiting in device emulation code with
aio_poll().
Paolo Bonzini suggested running non-coroutine QMP handlers in the
iohandler AioContext. This avoids trouble with nested event loops. His
original idea was to move coroutine rescheduling to
monitor_qmp_dispatch(), but I resorted to moving it to qmp_dispatch()
because we don't know if the QMP handler needs to run in coroutine
context in monitor_qmp_dispatch(). monitor_qmp_dispatch() would have
been nicer since it's associated with the monitor implementation and not
as general as qmp_dispatch(), which is also used by qemu-ga.
A number of qemu-iotests need updated .out files because the order of
QMP events vs QMP responses has changed.
Solves Issue #1933.
Cc: qemu-stable@nongnu.org
Fixes: 7bed89958b ("device_core: use drain_call_rcu in in qmp_device_add")
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2215192
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2214985
Buglink: https://issues.redhat.com/browse/RHEL-17369
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20240118144823.1497953-4-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Tested-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
138 lines
4.2 KiB
Bash
Executable file
138 lines
4.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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# group: rw
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#
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# Test writing image headers of other formats into raw images
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#
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# Copyright (C) 2014 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, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=kwolf@redhat.com
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seq="$(basename $0)"
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_qemu
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_rm_test_img "$TEST_IMG.src"
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.qemu
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_supported_fmt raw
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_supported_proto file
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_supported_os Linux
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_require_drivers qcow qcow2 qed vdi vmdk vpc
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qemu_comm_method=qmp
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run_qemu()
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{
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local raw_img="$1"
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local source_img="$2"
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local qmp_format="$3"
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local qmp_event="$4"
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_launch_qemu -drive file="${source_img}",format=raw,cache=${CACHEMODE},aio=${AIOMODE},id=src
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_send_qemu_cmd $QEMU_HANDLE "{ 'execute': 'qmp_capabilities' }" "return"
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capture_events="$qmp_event" _send_qemu_cmd $QEMU_HANDLE \
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"{'execute':'drive-mirror', 'arguments':{
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'device': 'src', 'target': '$raw_img', $qmp_format
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'mode': 'existing', 'sync': 'full'}}" \
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"return"
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capture_events="$qmp_event JOB_STATUS_CHANGE" _wait_event $QEMU_HANDLE "$qmp_event"
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if test "$qmp_event" = BLOCK_JOB_ERROR; then
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_send_qemu_cmd $QEMU_HANDLE '' '"status": "null"'
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fi
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_send_qemu_cmd $QEMU_HANDLE '{"execute":"query-block-jobs"}' "return"
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_send_qemu_cmd $QEMU_HANDLE '{"execute":"quit"}' "return"
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wait=1 _cleanup_qemu
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}
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for fmt in qcow qcow2 qed vdi vmdk vpc; do
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echo
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echo "=== Writing a $fmt header into raw ==="
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echo
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TEST_IMG="$TEST_IMG.src" IMGFMT=$fmt _make_test_img 64M
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_make_test_img $(du -b "$TEST_IMG.src" | cut -f1) | _filter_img_create_size
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# This first test should fail: The image format was probed, we may not
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# write an image header at the start of the image
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run_qemu "$TEST_IMG" "$TEST_IMG.src" "" "BLOCK_JOB_ERROR" |
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_filter_block_job_len
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$QEMU_IO -c 'read -P 0 0 512' "$TEST_IMG" | _filter_qemu_io
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# When raw was explicitly specified, the same must succeed
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run_qemu "$TEST_IMG" "$TEST_IMG.src" "'format': 'raw'," "BLOCK_JOB_READY"
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$QEMU_IMG compare -f raw -F raw "$TEST_IMG" "$TEST_IMG.src"
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done
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for sample_img in empty.bochs iotest-dirtylog-10G-4M.vhdx parallels-v1 \
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simple-pattern.cloop; do
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echo
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echo "=== Copying sample image $sample_img into raw ==="
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echo
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# Can't use _use_sample_img because that isn't designed to be used multiple
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# times and it overwrites $TEST_IMG (both breaks cleanup)
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bzcat "$SAMPLE_IMG_DIR/$sample_img.bz2" > "$TEST_IMG.src"
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_make_test_img $(du -b "$TEST_IMG.src" | cut -f1) | _filter_img_create_size
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run_qemu "$TEST_IMG" "$TEST_IMG.src" "" "BLOCK_JOB_ERROR" |
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_filter_block_job_offset | _filter_block_job_len
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$QEMU_IO -c 'read -P 0 0 512' "$TEST_IMG" | _filter_qemu_io
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run_qemu "$TEST_IMG" "$TEST_IMG.src" "'format': 'raw'," "BLOCK_JOB_READY"
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$QEMU_IMG compare -f raw -F raw "$TEST_IMG" "$TEST_IMG.src"
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done
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echo
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echo "=== Write legitimate MBR into raw ==="
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echo
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for sample_img in grub_mbr.raw; do
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bzcat "$SAMPLE_IMG_DIR/$sample_img.bz2" > "$TEST_IMG.src"
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_make_test_img $(du -b "$TEST_IMG.src" | cut -f1) | _filter_img_create_size
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run_qemu "$TEST_IMG" "$TEST_IMG.src" "" "BLOCK_JOB_READY"
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$QEMU_IMG compare -f raw -F raw "$TEST_IMG" "$TEST_IMG.src"
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run_qemu "$TEST_IMG" "$TEST_IMG.src" "'format': 'raw'," "BLOCK_JOB_READY"
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$QEMU_IMG compare -f raw -F raw "$TEST_IMG" "$TEST_IMG.src"
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done
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# success, all done
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echo '*** done'
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rm -f $seq.full
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status=0
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