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865b58c05b
Support the LUN parameter change event. Currently, the host fires this event when the capacity of a disk is changed from the virtual machine monitor. The resize then appears in the kernel log like this: sd 0:0:0:0: [sda] 46137344 512-byte logical blocks: (23.6 GB/22.0 GIb) sda: detected capacity change from 22548578304 to 23622320128 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
#ifndef _LINUX_VIRTIO_SCSI_H
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#define _LINUX_VIRTIO_SCSI_H
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/* This header is BSD licensed so anyone can use the definitions to implement
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* compatible drivers/servers. */
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#define VIRTIO_SCSI_CDB_SIZE 32
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#define VIRTIO_SCSI_SENSE_SIZE 96
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/* SCSI command request, followed by data-out */
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struct virtio_scsi_cmd_req {
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u8 lun[8]; /* Logical Unit Number */
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u64 tag; /* Command identifier */
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u8 task_attr; /* Task attribute */
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u8 prio;
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u8 crn;
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u8 cdb[VIRTIO_SCSI_CDB_SIZE];
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} __packed;
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/* Response, followed by sense data and data-in */
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struct virtio_scsi_cmd_resp {
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u32 sense_len; /* Sense data length */
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u32 resid; /* Residual bytes in data buffer */
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u16 status_qualifier; /* Status qualifier */
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u8 status; /* Command completion status */
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u8 response; /* Response values */
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u8 sense[VIRTIO_SCSI_SENSE_SIZE];
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} __packed;
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/* Task Management Request */
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struct virtio_scsi_ctrl_tmf_req {
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u32 type;
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u32 subtype;
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u8 lun[8];
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u64 tag;
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} __packed;
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struct virtio_scsi_ctrl_tmf_resp {
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u8 response;
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} __packed;
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/* Asynchronous notification query/subscription */
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struct virtio_scsi_ctrl_an_req {
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u32 type;
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u8 lun[8];
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u32 event_requested;
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} __packed;
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struct virtio_scsi_ctrl_an_resp {
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u32 event_actual;
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u8 response;
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} __packed;
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struct virtio_scsi_event {
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u32 event;
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u8 lun[8];
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u32 reason;
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} __packed;
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struct virtio_scsi_config {
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u32 num_queues;
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u32 seg_max;
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u32 max_sectors;
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u32 cmd_per_lun;
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u32 event_info_size;
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u32 sense_size;
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u32 cdb_size;
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u16 max_channel;
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u16 max_target;
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u32 max_lun;
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} __packed;
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/* Feature Bits */
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#define VIRTIO_SCSI_F_INOUT 0
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#define VIRTIO_SCSI_F_HOTPLUG 1
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#define VIRTIO_SCSI_F_CHANGE 2
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/* Response codes */
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#define VIRTIO_SCSI_S_OK 0
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#define VIRTIO_SCSI_S_OVERRUN 1
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#define VIRTIO_SCSI_S_ABORTED 2
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#define VIRTIO_SCSI_S_BAD_TARGET 3
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#define VIRTIO_SCSI_S_RESET 4
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#define VIRTIO_SCSI_S_BUSY 5
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#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
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#define VIRTIO_SCSI_S_TARGET_FAILURE 7
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#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
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#define VIRTIO_SCSI_S_FAILURE 9
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#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
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#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
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#define VIRTIO_SCSI_S_INCORRECT_LUN 12
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/* Controlq type codes. */
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#define VIRTIO_SCSI_T_TMF 0
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#define VIRTIO_SCSI_T_AN_QUERY 1
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#define VIRTIO_SCSI_T_AN_SUBSCRIBE 2
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/* Valid TMF subtypes. */
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#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
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#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
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#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
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#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
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#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
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#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
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#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
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#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
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/* Events. */
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#define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000
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#define VIRTIO_SCSI_T_NO_EVENT 0
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#define VIRTIO_SCSI_T_TRANSPORT_RESET 1
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#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
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#define VIRTIO_SCSI_T_PARAM_CHANGE 3
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/* Reasons of transport reset event */
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#define VIRTIO_SCSI_EVT_RESET_HARD 0
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#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
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#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
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#define VIRTIO_SCSI_S_SIMPLE 0
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#define VIRTIO_SCSI_S_ORDERED 1
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#define VIRTIO_SCSI_S_HEAD 2
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#define VIRTIO_SCSI_S_ACA 3
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#endif /* _LINUX_VIRTIO_SCSI_H */
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