a616fb75c2
The official way of enabling dataplane is through the "iothread"
property that references an iothread object created by "-object
iothread". Since the old "x-data-plane=on" way now even crashes, it's
probably easier to just drop it:
$ qemu-system-x86_64 -drive file=null-co://,id=d0,if=none \
-device virtio-blk-pci,drive=d0,x-data-plane=on
ERROR:/home/fam/work/qemu/qom/object.c:1515:
object_get_canonical_path_component: assertion failed: (obj->parent != NULL)
Aborted
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1449485967-19240-1-git-send-email-famz@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
92 lines
2.1 KiB
C
92 lines
2.1 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"
|
|
|
|
#define TYPE_VIRTIO_BLK "virtio-blk-device"
|
|
#define VIRTIO_BLK(obj) \
|
|
OBJECT_CHECK(VirtIOBlock, (obj), TYPE_VIRTIO_BLK)
|
|
|
|
/* This is the last element of the write scatter-gather list */
|
|
struct virtio_blk_inhdr
|
|
{
|
|
unsigned char status;
|
|
};
|
|
|
|
struct VirtIOBlkConf
|
|
{
|
|
BlockConf conf;
|
|
IOThread *iothread;
|
|
char *serial;
|
|
uint32_t scsi;
|
|
uint32_t config_wce;
|
|
uint32_t request_merging;
|
|
};
|
|
|
|
struct VirtIOBlockDataPlane;
|
|
|
|
struct VirtIOBlockReq;
|
|
typedef struct VirtIOBlock {
|
|
VirtIODevice parent_obj;
|
|
BlockBackend *blk;
|
|
VirtQueue *vq;
|
|
void *rq;
|
|
QEMUBH *bh;
|
|
VirtIOBlkConf conf;
|
|
unsigned short sector_mask;
|
|
bool original_wce;
|
|
VMChangeStateEntry *change;
|
|
/* Function to push to vq and notify guest */
|
|
void (*complete_request)(struct VirtIOBlockReq *req, unsigned char status);
|
|
Notifier migration_state_notifier;
|
|
struct VirtIOBlockDataPlane *dataplane;
|
|
} VirtIOBlock;
|
|
|
|
typedef struct VirtIOBlockReq {
|
|
int64_t sector_num;
|
|
VirtIOBlock *dev;
|
|
VirtQueueElement elem;
|
|
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;
|
|
|
|
VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s);
|
|
|
|
void virtio_blk_free_request(VirtIOBlockReq *req);
|
|
|
|
void virtio_blk_handle_request(VirtIOBlockReq *req, MultiReqBuffer *mrb);
|
|
|
|
void virtio_blk_submit_multireq(BlockBackend *blk, MultiReqBuffer *mrb);
|
|
|
|
#endif
|