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virtio-scsi: Split virtio_scsi_handle_cmd_req from virtio_scsi_handle_cmd

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This is the "common part" to handle one cmd request. Refactor out for
later usage of dataplane iothread code.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Fam Zheng 2014-08-06 13:35:00 +08:00 • committed by Paolo Bonzini
parent 9df7bfddcc
commit bf359a445e
2 changed files with 79 additions and 74 deletions
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36
include/hw/virtio/virtio-scsi.h
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@ -172,6 +172,41 @@ typedef struct {
bool events_dropped;
} VirtIOSCSI;
typedef struct VirtIOSCSIReq {
VirtIOSCSI *dev;
VirtQueue *vq;
QEMUSGList qsgl;
QEMUIOVector resp_iov;
/* Note:
* - fields before elem are initialized by virtio_scsi_init_req;
* - elem is uninitialized at the time of allocation.
* - fields after elem are zeroed by virtio_scsi_init_req.
* */
VirtQueueElement elem;
SCSIRequest *sreq;
size_t resp_size;
enum SCSIXferMode mode;
union {
VirtIOSCSICmdResp cmd;
VirtIOSCSICtrlTMFResp tmf;
VirtIOSCSICtrlANResp an;
VirtIOSCSIEvent event;
} resp;
union {
struct {
VirtIOSCSICmdReq cmd;
uint8_t cdb[];
} QEMU_PACKED;
VirtIOSCSICtrlTMFReq tmf;
VirtIOSCSICtrlANReq an;
} req;
} VirtIOSCSIReq;
QEMU_BUILD_BUG_ON(offsetof(VirtIOSCSIReq, req.cdb) !=
offsetof(VirtIOSCSIReq, req.cmd) + sizeof(VirtIOSCSICmdReq));
#define DEFINE_VIRTIO_SCSI_PROPERTIES(_state, _conf_field) \
DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \
DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF),\
@ -192,5 +227,6 @@ void virtio_scsi_common_realize(DeviceState *dev, Error **errp,
HandleOutput cmd);
void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp);
void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req);
#endif /* _QEMU_VIRTIO_SCSI_H */