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scsi: qla2xxx: Use explicit LOGO in target mode

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Target makes implicit LOGO on session teardown. LOGO ELS is not send on the
wire and initiator is not aware that target no longer wants talking to
it. Initiator keeps sending I/O requests, target responds with BA_RJT, they
time out and then initiator sends ABORT TASK (ABTS-LS).

Current behaviour incurs unneeded I/O timeout and can be fixed for some
initiators by making explicit LOGO on session deletion.

Link: https://lore.kernel.org/r/20191125165702.1013-3-r.bolshakov@yadro.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2019-11-25 19:56:51 +03:00 committed by Martin K. Petersen
parent f2c9ee54a5
commit 86196a8fa8
4 changed files with 15 additions and 4 deletions
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1
drivers/scsi/qla2xxx/qla_def.h
View file

@ -2401,6 +2401,7 @@ typedef struct fc_port {
unsigned int id_changed:1;
unsigned int scan_needed:1;
unsigned int n2n_flag:1;
unsigned int explicit_logout:1;
struct completion nvme_del_done;
uint32_t nvme_prli_service_param;

16
drivers/scsi/qla2xxx/qla_iocb.c
View file

@ -2405,11 +2405,19 @@ qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
static void
qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
{
u16 control_flags = LCF_COMMAND_LOGO;
logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
logio->control_flags =
cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
if (!sp->fcport->keep_nport_handle)
logio->control_flags |= cpu_to_le16(LCF_FREE_NPORT);
if (sp->fcport->explicit_logout) {
control_flags |= LCF_EXPL_LOGO|LCF_FREE_NPORT;
} else {
control_flags |= LCF_IMPL_LOGO;
if (!sp->fcport->keep_nport_handle)
control_flags |= LCF_FREE_NPORT;
}
logio->control_flags = cpu_to_le16(control_flags);
logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
logio->port_id[0] = sp->fcport->d_id.b.al_pa;
logio->port_id[1] = sp->fcport->d_id.b.area;

1
drivers/scsi/qla2xxx/qla_target.c
View file

@ -1104,6 +1104,7 @@ void qlt_free_session_done(struct work_struct *work)
}
}
sess->explicit_logout = 0;
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
sess->free_pending = 0;

1
drivers/scsi/qla2xxx/tcm_qla2xxx.c
View file

@ -350,6 +350,7 @@ static void tcm_qla2xxx_close_session(struct se_session *se_sess)
target_sess_cmd_list_set_waiting(se_sess);
spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
sess->explicit_logout = 1;
tcm_qla2xxx_put_sess(sess);
}