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scsi: qla2xxx: edif: Reduce connection thrash 

On ipsec start by remote port, target port may use RSCN to trigger
initiator to relogin. If driver is already in the process of a relogin,
then ignore the RSCN and allow the current relogin to continue. This
reduces thrashing of the connection.

Link: https://lore.kernel.org/r/20211026115412.27691-10-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2021-10-26 04:54:08 -07:00 committed by Martin K. Petersen
parent 6c9998ce4b
commit 91f6f5fbe8
3 changed files with 32 additions and 3 deletions
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7
drivers/scsi/qla2xxx/qla_attr.c
View File

@ -2762,7 +2762,12 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
if (fcport->loop_id != FC_NO_LOOP_ID)
fcport->logout_on_delete = 1;
qlt_schedule_sess_for_deletion(fcport);
if (!EDIF_NEGOTIATION_PENDING(fcport)) {
ql_dbg(ql_dbg_disc, fcport->vha, 0x911e,
"%s %d schedule session deletion\n", __func__,
__LINE__);
qlt_schedule_sess_for_deletion(fcport);
}
} else {
qla2x00_port_logout(fcport->vha, fcport);
}

4
drivers/scsi/qla2xxx/qla_edif.h
View File

@ -132,4 +132,8 @@ struct enode {
_s->disc_state == DSC_DELETED || \
!_s->edif.app_sess_online))
#define EDIF_NEGOTIATION_PENDING(_fcport) \
((_fcport->vha.e_dbell.db_flags & EDB_ACTIVE) && \
(_fcport->disc_state == DSC_LOGIN_AUTH_PEND))
#endif /* __QLA_EDIF_H */

24
drivers/scsi/qla2xxx/qla_init.c
View File

@ -1793,8 +1793,28 @@ void qla2x00_handle_rscn(scsi_qla_host_t *vha, struct event_arg *ea)
fcport->d_id.b24, fcport->port_name);
return;
}
fcport->scan_needed = 1;
fcport->rscn_gen++;
if (vha->hw->flags.edif_enabled && vha->e_dbell.db_flags & EDB_ACTIVE) {
/*
* On ipsec start by remote port, Target port
* may use RSCN to trigger initiator to
* relogin. If driver is already in the
* process of a relogin, then ignore the RSCN
* and allow the current relogin to continue.
* This reduces thrashing of the connection.
*/
if (atomic_read(&fcport->state) == FCS_ONLINE) {
/*
* If state = online, then set scan_needed=1 to do relogin.
* Otherwise we're already in the middle of a relogin
*/
fcport->scan_needed = 1;
fcport->rscn_gen++;
}
} else {
fcport->scan_needed = 1;
fcport->rscn_gen++;
}
}
break;
case RSCN_AREA_ADDR: