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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-03-16 22:51:35 +0100 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-06-02 21:41:33 +0200 |
| commit | 1b49dcf3d7c765ad18ca7167a0e441824eb1f7af (patch) | |
| tree | 5bb2c91afddab39abe6a29e507acde2f6b67ee18 /include | |
| parent | Target/iser: Gracefully reject T10-PI enabled connect request if not supported (diff) | |
| download | linux-1b49dcf3d7c765ad18ca7167a0e441824eb1f7af.tar.xz linux-1b49dcf3d7c765ad18ca7167a0e441824eb1f7af.zip | |
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: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio_scsi.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/virtio_scsi.h b/include/linux/virtio_scsi.h index 4195b97a3def..de429d1f4357 100644 --- a/include/linux/virtio_scsi.h +++ b/include/linux/virtio_scsi.h @@ -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 |