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07fde5901b
If we have a server running disk requests that is for whatever reason hanging or not able to process any more IO requests but still has some in-flight requests previously issued by the guest OS, QEMU will still try to drain the vring before shutting down even if it was explicitly asked to do a "force shutdown" via SIGTERM or QMP quit. This is not useful since the guest is no longer running at this point since it was killed by QEMU earlier in the process. At this point, we don't care about whatever in-flight IO it might have pending, we just want QEMU to shut down. Add an option called "skip-get-vring-base-on-force-shutdown" to allow SIGTERM/QMP quit() to actually act like a "force shutdown" at least for vhost-user-blk devices since those require the drain operation to shut down gracefully unlike, for example, network devices. Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru> Message-Id: <20250609212547.2859224-4-d-tatianin@yandex-team.ru> Acked-by: Raphael Norwitz <raphael@enfabrica.net> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* vhost-user-blk host device
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* Copyright(C) 2017 Intel Corporation.
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*
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* Authors:
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* Changpeng Liu <changpeng.liu@intel.com>
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*
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* Based on vhost-scsi.h, Copyright IBM, Corp. 2011
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*
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* This work is licensed under the terms of the GNU LGPL, version 2 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#ifndef VHOST_USER_BLK_H
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#define VHOST_USER_BLK_H
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#include "standard-headers/linux/virtio_blk.h"
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#include "hw/block/block.h"
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#include "chardev/char-fe.h"
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#include "hw/virtio/vhost.h"
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#include "hw/virtio/vhost-user.h"
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#include "qom/object.h"
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#define TYPE_VHOST_USER_BLK "vhost-user-blk"
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OBJECT_DECLARE_SIMPLE_TYPE(VHostUserBlk, VHOST_USER_BLK)
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#define VHOST_USER_BLK_AUTO_NUM_QUEUES UINT16_MAX
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struct VHostUserBlk {
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VirtIODevice parent_obj;
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CharBackend chardev;
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int32_t bootindex;
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struct virtio_blk_config blkcfg;
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uint16_t num_queues;
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uint32_t queue_size;
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struct vhost_dev dev;
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struct vhost_inflight *inflight;
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VhostUserState vhost_user;
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struct vhost_virtqueue *vhost_vqs;
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VirtQueue **virtqs;
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/*
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* There are at least two steps of initialization of the
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* vhost-user device. The first is a "connect" step and
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* second is a "start" step. Make a separation between
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* those initialization phases by using two fields.
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*/
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/* vhost_user_blk_connect/vhost_user_blk_disconnect */
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bool connected;
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/* vhost_user_blk_start/vhost_user_blk_stop */
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bool started_vu;
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bool skip_get_vring_base_on_force_shutdown;
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};
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#endif
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