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[SCSI] libfc: Add local port point-to-multipoint flag

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For VN_port to VN_port mode, the transport sets the port_id and
there's no lport FLOGI.  This is similar to FC loop mode.

Add a point_to_multipoint flag that indicates the local port is in
point-to-multipoint mode.  This skips FLOGI and discovery.
It also skips resetting the port_id on resets other than link down.

Add function fc_lport_set_local_id() that sets the local port_id.
This is called by libfcoe on behalf of the low-level driver
to set the port_id when the link comes up.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Joe Eykholt 2010-07-20 15:20:03 -07:00 committed by James Bottomley
parent 3d902ac09a
commit 3726f3584e
2 changed files with 37 additions and 1 deletions
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36
drivers/scsi/libfc/fc_lport.c
View File

@ -754,6 +754,34 @@ static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
lport->tt.lport_set_port_id(lport, port_id, fp);
}
/**
* fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
* @lport: The local port which will have its Port ID set.
* @port_id: The new port ID.
*
* Called by the lower-level driver when transport sets the local port_id.
* This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
* discovery to be skipped.
*/
void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
{
mutex_lock(&lport->lp_mutex);
fc_lport_set_port_id(lport, port_id, NULL);
switch (lport->state) {
case LPORT_ST_RESET:
case LPORT_ST_FLOGI:
if (port_id)
fc_lport_enter_ready(lport);
break;
default:
break;
}
mutex_unlock(&lport->lp_mutex);
}
EXPORT_SYMBOL(fc_lport_set_local_id);
/**
* fc_lport_recv_flogi_req() - Receive a FLOGI request
* @sp_in: The sequence the FLOGI is on
@ -954,7 +982,7 @@ static void fc_lport_reset_locked(struct fc_lport *lport)
lport->tt.exch_mgr_reset(lport, 0, 0);
fc_host_fabric_name(lport->host) = 0;
if (lport->port_id)
if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
fc_lport_set_port_id(lport, 0, NULL);
}
@ -1536,6 +1564,12 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
fc_lport_state_enter(lport, LPORT_ST_FLOGI);
if (lport->point_to_multipoint) {
if (lport->port_id)
fc_lport_enter_ready(lport);
return;
}
fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
if (!fp)
return fc_lport_error(lport, fp);

2
include/scsi/libfc.h
View File

@ -846,6 +846,7 @@ struct fc_lport {
u32 lro_enabled:1;
u32 does_npiv:1;
u32 npiv_enabled:1;
u32 point_to_multipoint:1;
u32 mfs;
u8 max_retry_count;
u8 max_rport_retry_count;
@ -991,6 +992,7 @@ int fc_set_mfs(struct fc_lport *, u32 mfs);
struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
int fc_lport_bsg_request(struct fc_bsg_job *);
void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
/*
* REMOTE PORT LAYER