[SCSI] fc class: add fc host default default dev loss setting

This patch adds a fc_host setting to store the
default dev_loss_tmo. It is used if the driver
has a callack to get the value from the LLD. If
the callback is not set, then we use the fc class
module default value.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index d7e470a..9f0f7d9 100644 (file)
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -2525,7 +2525,11 @@ fc_rport_create(struct Scsi_Host *shost, int channel,
 
        rport->maxframe_size = -1;
        rport->supported_classes = FC_COS_UNSPECIFIED;
-       rport->dev_loss_tmo = fc_dev_loss_tmo;
+       if (fci->f->get_host_def_dev_loss_tmo) {
+               fci->f->get_host_def_dev_loss_tmo(shost);
+               rport->dev_loss_tmo = fc_host_def_dev_loss_tmo(shost);
+       } else
+               rport->dev_loss_tmo = fc_dev_loss_tmo;
        memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
        memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
        rport->port_id = ids->port_id;

diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 87d81b3..9f98fca 100644 (file)
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -496,6 +496,7 @@ struct fc_host_attrs {
        u64 fabric_name;
        char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
        char system_hostname[FC_SYMBOLIC_NAME_SIZE];
+       u32 def_dev_loss_tmo;
 
        /* Private (Transport-managed) Attributes */
        enum fc_tgtid_binding_type  tgtid_bind_type;
@@ -580,6 +581,8 @@ struct fc_host_attrs {
        (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
 #define fc_host_devloss_work_q(x) \
        (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
+#define fc_host_def_dev_loss_tmo(x) \
+       (((struct fc_host_attrs *)(x)->shost_data)->def_dev_loss_tmo)
 
 
 struct fc_bsg_buffer {
@@ -640,6 +643,7 @@ struct fc_function_template {
        void    (*get_host_fabric_name)(struct Scsi_Host *);
        void    (*get_host_symbolic_name)(struct Scsi_Host *);
        void    (*set_host_system_hostname)(struct Scsi_Host *);
+       void    (*get_host_def_dev_loss_tmo)(struct Scsi_Host *);
 
        struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
        void    (*reset_fc_host_stats)(struct Scsi_Host *);