mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
8802f4f4e3
The VirtIOBlock::rq field has had the type void * since its introduction
in commit 869a5c6df1 ("Stop VM on error in virtio-blk. (Gleb
Natapov)").
Perhaps this was done to avoid the forward declaration of
VirtIOBlockReq.
Hanna Czenczek <hreitz@redhat.com> pointed out the missing type. Specify
the actual type because there is no need to use void * here.
Suggested-by: Hanna Czenczek <hreitz@redhat.com>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20240206190610.107963-5-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/*
|
|
* Virtio Block Device
|
|
*
|
|
* Copyright IBM, Corp. 2007
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef QEMU_VIRTIO_BLK_H
|
|
#define QEMU_VIRTIO_BLK_H
|
|
|
|
#include "standard-headers/linux/virtio_blk.h"
|
|
#include "hw/virtio/virtio.h"
|
|
#include "hw/block/block.h"
|
|
#include "sysemu/iothread.h"
|
|
#include "sysemu/block-backend.h"
|
|
#include "sysemu/block-ram-registrar.h"
|
|
#include "qom/object.h"
|
|
#include "qapi/qapi-types-virtio.h"
|
|
|
|
#define TYPE_VIRTIO_BLK "virtio-blk-device"
|
|
OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBlock, VIRTIO_BLK)
|
|
|
|
/* This is the last element of the write scatter-gather list */
|
|
struct virtio_blk_inhdr
|
|
{
|
|
unsigned char status;
|
|
};
|
|
|
|
#define VIRTIO_BLK_AUTO_NUM_QUEUES UINT16_MAX
|
|
|
|
struct VirtIOBlkConf
|
|
{
|
|
BlockConf conf;
|
|
IOThread *iothread;
|
|
IOThreadVirtQueueMappingList *iothread_vq_mapping_list;
|
|
char *serial;
|
|
uint32_t request_merging;
|
|
uint16_t num_queues;
|
|
uint16_t queue_size;
|
|
bool seg_max_adjust;
|
|
bool report_discard_granularity;
|
|
uint32_t max_discard_sectors;
|
|
uint32_t max_write_zeroes_sectors;
|
|
bool x_enable_wce_if_config_wce;
|
|
};
|
|
|
|
struct VirtIOBlockReq;
|
|
struct VirtIOBlock {
|
|
VirtIODevice parent_obj;
|
|
BlockBackend *blk;
|
|
QemuMutex rq_lock;
|
|
struct VirtIOBlockReq *rq; /* protected by rq_lock */
|
|
VirtIOBlkConf conf;
|
|
unsigned short sector_mask;
|
|
bool original_wce;
|
|
VMChangeStateEntry *change;
|
|
bool ioeventfd_disabled;
|
|
bool ioeventfd_started;
|
|
bool ioeventfd_starting;
|
|
bool ioeventfd_stopping;
|
|
|
|
/*
|
|
* The AioContext for each virtqueue. The BlockDriverState will use the
|
|
* first element as its AioContext.
|
|
*/
|
|
AioContext **vq_aio_context;
|
|
|
|
uint64_t host_features;
|
|
size_t config_size;
|
|
BlockRAMRegistrar blk_ram_registrar;
|
|
};
|
|
|
|
typedef struct VirtIOBlockReq {
|
|
VirtQueueElement elem;
|
|
int64_t sector_num;
|
|
VirtIOBlock *dev;
|
|
VirtQueue *vq;
|
|
IOVDiscardUndo inhdr_undo;
|
|
IOVDiscardUndo outhdr_undo;
|
|
struct virtio_blk_inhdr *in;
|
|
struct virtio_blk_outhdr out;
|
|
QEMUIOVector qiov;
|
|
size_t in_len;
|
|
struct VirtIOBlockReq *next;
|
|
struct VirtIOBlockReq *mr_next;
|
|
BlockAcctCookie acct;
|
|
} VirtIOBlockReq;
|
|
|
|
#define VIRTIO_BLK_MAX_MERGE_REQS 32
|
|
|
|
typedef struct MultiReqBuffer {
|
|
VirtIOBlockReq *reqs[VIRTIO_BLK_MAX_MERGE_REQS];
|
|
unsigned int num_reqs;
|
|
bool is_write;
|
|
} MultiReqBuffer;
|
|
|
|
void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq);
|
|
|
|
#endif
|