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Commit 1b49dcf3 authored by Nicholas Bellinger's avatar Nicholas Bellinger
Browse files

virtio-scsi.h: Add virtio_scsi_cmd_req_pi + VIRTIO_SCSI_F_T10_PI bits 



This patch adds a virtio_scsi_cmd_req_pi header as recommened by
Paolo that contains pi_bytesout + pi_bytesin elements used for
signaling when protection information buffers (in bytes) are
expected to preceed the data payload buffers.

Also add new VIRTIO_SCSI_F_T10_PI feature bit to be used to signal
host support.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@dev.mellanox.co.il>
Cc: H. Peter Anvin <hpa@zytor.com>
Acked-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 5f80ff8e

include/linux/virtio_scsi.h

+14 −1
Original line number Diff line number Diff line
@@ -35,11 +35,23 @@ struct virtio_scsi_cmd_req { 
	u8 lun[8];		/* Logical Unit Number */

	u64 tag;		/* Command identifier */

	u8 task_attr;		/* Task attribute */

	u8 prio;

	u8 prio;		/* SAM command priority field */

	u8 crn;

	u8 cdb[VIRTIO_SCSI_CDB_SIZE];

} __packed;



/* SCSI command request, followed by protection information */

struct virtio_scsi_cmd_req_pi {

	u8 lun[8];		/* Logical Unit Number */

	u64 tag;		/* Command identifier */

	u8 task_attr;		/* Task attribute */

	u8 prio;		/* SAM command priority field */

	u8 crn;

	u32 pi_bytesout;	/* DataOUT PI Number of bytes */

	u32 pi_bytesin;		/* DataIN PI Number of bytes */

	u8 cdb[VIRTIO_SCSI_CDB_SIZE];

} __packed;



/* Response, followed by sense data and data-in */

struct virtio_scsi_cmd_resp {

	u32 sense_len;		/* Sense data length */
@@ -97,6 +109,7 @@ struct virtio_scsi_config { 
#define VIRTIO_SCSI_F_INOUT                    0

#define VIRTIO_SCSI_F_HOTPLUG                  1

#define VIRTIO_SCSI_F_CHANGE                   2

#define VIRTIO_SCSI_F_T10_PI                   3



/* Response codes */

#define VIRTIO_SCSI_S_OK                       0