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[SCSI] scsi_transport_sas: add expander backlink

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This patch adds the ability to add a backlink to a particular port.  The
idea is to represent properly ports on expanders that are used
specifically for linking to the parent device in the topology.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
2006-07-09 12:38:19 -05:00
committed by James Bottomley
parent 631c228cd0
commit a0e1b6ef3b
2 changed files with 23 additions and 0 deletions
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3
include/scsi/scsi_transport_sas.h
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@@ -130,6 +130,8 @@ struct sas_port {
int port_identifier;
int num_phys;
/* port flags */
unsigned int is_backlink:1;
/* the other end of the link */
struct sas_rphy *rphy;
@@ -175,6 +177,7 @@ void sas_port_free(struct sas_port *);
void sas_port_delete(struct sas_port *);
void sas_port_add_phy(struct sas_port *, struct sas_phy *);
void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
void sas_port_mark_backlink(struct sas_port *);
int scsi_is_sas_port(const struct device *);
extern struct scsi_transport_template *