[SCSI] fc_transport: add target driver support
This adds minimum target driver support like the srp transport does:
- fc_remote_port_{rolechg,delete} calls
scsi_tgt_it_nexus_{create,destroy} for target drivers.
- add callbacks to notify target drivers of the nexus and tmf
operation results to fc_function_template.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index dd97f26..8df0f08 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -36,6 +36,7 @@
#include <net/netlink.h>
#include <scsi/scsi_netlink_fc.h>
#include "scsi_priv.h"
+#include "scsi_transport_fc_internal.h"
static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
static void fc_vport_sched_delete(struct work_struct *work);
@@ -1956,6 +1957,19 @@
return 0;
}
+static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
+ int result)
+{
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
+}
+
+static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
+{
+ struct fc_internal *i = to_fc_internal(shost->transportt);
+ return i->f->it_nexus_response(shost, nexus, result);
+}
+
struct scsi_transport_template *
fc_attach_transport(struct fc_function_template *ft)
{
@@ -1999,6 +2013,10 @@
i->t.user_scan = fc_user_scan;
+ /* target-mode drivers' functions */
+ i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
+ i->t.it_nexus_response = fc_it_nexus_response;
+
/*
* Setup SCSI Target Attributes.
*/
@@ -2756,6 +2774,10 @@
spin_unlock_irqrestore(shost->host_lock, flags);
+ if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
+ shost->active_mode & MODE_TARGET)
+ fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
+
scsi_target_block(&rport->dev);
/* see if we need to kill io faster than waiting for device loss */
@@ -2796,6 +2818,7 @@
struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
unsigned long flags;
int create = 0;
+ int ret;
spin_lock_irqsave(shost->host_lock, flags);
if (roles & FC_PORT_ROLE_FCP_TARGET) {
@@ -2804,6 +2827,12 @@
create = 1;
} else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
create = 1;
+ } else if (shost->active_mode & MODE_TARGET) {
+ ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
+ (char *)&rport->node_name);
+ if (ret)
+ printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
+ ret);
}
rport->roles = roles;
