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scsi: qla2xxx: Fix stuck session in GNL

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Fix race condition between GNL completion processing and GNL request. Late
submission of GNL request was not seen by the GNL completion thread. This
patch will re-submit the GNL request for late submission fcport.

Link: https://lore.kernel.org/r/20191217220617.28084-13-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2019-12-17 14:06:15 -08:00 committed by Martin K. Petersen
parent 118f01e7d9
commit e1217dc3ed
2 changed files with 28 additions and 8 deletions
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15
drivers/scsi/qla2xxx/qla_init.c
View file

@ -990,7 +990,7 @@ static void qla24xx_async_gnl_sp_done(srb_t *sp, int res)
set_bit(loop_id, vha->hw->loop_id_map);
wwn = wwn_to_u64(e->port_name);
ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x20e8,
ql_dbg(ql_dbg_disc, vha, 0x20e8,
"%s %8phC %02x:%02x:%02x CLS %x/%x lid %x \n",
__func__, (void *)&wwn, e->port_id[2], e->port_id[1],
e->port_id[0], e->current_login_state, e->last_login_state,
@ -1049,6 +1049,16 @@ static void qla24xx_async_gnl_sp_done(srb_t *sp, int res)
spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
vha->gnl.sent = 0;
if (!list_empty(&vha->gnl.fcports)) {
/* retrigger gnl */
list_for_each_entry_safe(fcport, tf, &vha->gnl.fcports,
gnl_entry) {
list_del_init(&fcport->gnl_entry);
fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
if (qla24xx_post_gnl_work(vha, fcport) == QLA_SUCCESS)
break;
}
}
spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
sp->free(sp);
@ -2000,7 +2010,7 @@ qla24xx_handle_plogi_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
qla24xx_post_prli_work(vha, ea->fcport);
} else {
ql_dbg(ql_dbg_disc, vha, 0x20ea,
"%s %d %8phC LoopID 0x%x in use with %06x. post gnl\n",
"%s %d %8phC LoopID 0x%x in use with %06x. post gpdb\n",
__func__, __LINE__, ea->fcport->port_name,
ea->fcport->loop_id, ea->fcport->d_id.b24);
@ -2071,6 +2081,7 @@ qla24xx_handle_plogi_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
set_bit(lid, vha->hw->loop_id_map);
ea->fcport->loop_id = lid;
ea->fcport->keep_nport_handle = 0;
ea->fcport->logout_on_delete = 1;
qlt_schedule_sess_for_deletion(ea->fcport);
}
break;

21
drivers/scsi/qla2xxx/qla_target.c
View file

@ -958,7 +958,7 @@ void qlt_free_session_done(struct work_struct *work)
struct qlt_plogi_ack_t *own =
sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
ql_dbg(ql_dbg_disc, vha, 0xf084,
"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
@ -1025,7 +1025,7 @@ void qlt_free_session_done(struct work_struct *work)
while (!READ_ONCE(sess->logout_completed)) {
if (!traced) {
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
ql_dbg(ql_dbg_disc, vha, 0xf086,
"%s: waiting for sess %p logout\n",
__func__, sess);
traced = true;
@ -1046,6 +1046,10 @@ void qlt_free_session_done(struct work_struct *work)
(struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
}
spin_lock_irqsave(&vha->work_lock, flags);
sess->flags &= ~FCF_ASYNC_SENT;
spin_unlock_irqrestore(&vha->work_lock, flags);
spin_lock_irqsave(&ha->tgt.sess_lock, flags);
if (sess->se_sess) {
sess->se_sess = NULL;
@ -1109,7 +1113,7 @@ void qlt_free_session_done(struct work_struct *work)
spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
sess->free_pending = 0;
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
ql_dbg(ql_dbg_disc, vha, 0xf001,
"Unregistration of sess %p %8phC finished fcp_cnt %d\n",
sess, sess->port_name, vha->fcport_count);
@ -1152,6 +1156,11 @@ void qlt_unreg_sess(struct fc_port *sess)
return;
}
sess->free_pending = 1;
/*
* Use FCF_ASYNC_SENT flag to block other cmds used in sess
* management from being sent.
*/
sess->flags |= FCF_ASYNC_SENT;
spin_unlock_irqrestore(&sess->vha->work_lock, flags);
if (sess->se_sess)
@ -4581,7 +4590,7 @@ qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
/* find other sess with nport_id collision */
if (port_id.b24 == other_sess->d_id.b24) {
if (loop_id != other_sess->loop_id) {
ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
ql_dbg(ql_dbg_disc, vha, 0x1000c,
"Invalidating sess %p loop_id %d wwn %llx.\n",
other_sess, other_sess->loop_id, other_wwn);
@ -4597,7 +4606,7 @@ qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
* Another wwn used to have our s_id/loop_id
* kill the session, but don't free the loop_id
*/
ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
ql_dbg(ql_dbg_disc, vha, 0xf01b,
"Invalidating sess %p loop_id %d wwn %llx.\n",
other_sess, other_sess->loop_id, other_wwn);
@ -4612,7 +4621,7 @@ qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
/* find other sess with nport handle collision */
if ((loop_id == other_sess->loop_id) &&
(loop_id != FC_NO_LOOP_ID)) {
ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
ql_dbg(ql_dbg_disc, vha, 0x1000d,
"Invalidating sess %p loop_id %d wwn %llx.\n",
other_sess, other_sess->loop_id, other_wwn);