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authorHannes Reinecke <hare@suse.de>2016-03-03 09:54:07 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2016-03-06 01:14:37 +0300
commit77c9df9644d7c35516770a21cb56b413e8547d8f (patch)
treebb7303df95797e5b6d2b3a6961b079a6725c24e6 /include/scsi
parent7e47976bcff23cbe011635e8931855cd3fb3aa6f (diff)
downloadlinux-77c9df9644d7c35516770a21cb56b413e8547d8f.tar.xz
scsi: Add 'access_state' and 'preferred_path' attribute
Add an 'access_state' field to struct scsi_device and display them in sysfs as 'access_state' and 'preferred_path' attribute. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Bart van Assche <bart.vanassche@sandisk.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_device.h1
-rw-r--r--include/scsi/scsi_proto.h12
2 files changed, 13 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 4af2b240c4d1..c067019ed12a 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -201,6 +201,7 @@ struct scsi_device {
struct scsi_device_handler *handler;
void *handler_data;
+ unsigned char access_state;
enum scsi_device_state sdev_state;
unsigned long sdev_data[0];
} __attribute__((aligned(sizeof(unsigned long))));
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
index a9fbf1b38e71..c2ae21cbaa2c 100644
--- a/include/scsi/scsi_proto.h
+++ b/include/scsi/scsi_proto.h
@@ -277,5 +277,17 @@ struct scsi_lun {
__u8 scsi_lun[8];
};
+/* SPC asymmetric access states */
+#define SCSI_ACCESS_STATE_OPTIMAL 0x00
+#define SCSI_ACCESS_STATE_ACTIVE 0x01
+#define SCSI_ACCESS_STATE_STANDBY 0x02
+#define SCSI_ACCESS_STATE_UNAVAILABLE 0x03
+#define SCSI_ACCESS_STATE_LBA 0x04
+#define SCSI_ACCESS_STATE_OFFLINE 0x0e
+#define SCSI_ACCESS_STATE_TRANSITIONING 0x0f
+
+/* Values for REPORT TARGET GROUP STATES */
+#define SCSI_ACCESS_STATE_MASK 0x0f
+#define SCSI_ACCESS_STATE_PREFERRED 0x80
#endif /* _SCSI_PROTO_H_ */