virtio-scsi.h: Add virtio_scsi_cmd_req_pi + VIRTIO_SCSI_F_T10_PI bits (1b49dcf3) · Commits · 戴 / test

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:

Rusty Russell <rusty@rustcorp.com.au> Acked-by:

Michael S. Tsirkin <mst@redhat.com> Signed-off-by:

Nicholas Bellinger <nab@linux-iscsi.org>

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

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