From patchwork Tue Dec 17 22:06:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Himanshu Madhani X-Patchwork-Id: 11298795 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C999514D5 for ; Tue, 17 Dec 2019 22:07:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D9F821582 for ; Tue, 17 Dec 2019 22:07:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b="euvQ9dlA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726090AbfLQWHI (ORCPT ); Tue, 17 Dec 2019 17:07:08 -0500 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:36992 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725940AbfLQWHI (ORCPT ); Tue, 17 Dec 2019 17:07:08 -0500 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBHM5eEk030252; Tue, 17 Dec 2019 14:07:02 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0818; bh=Ebq53QuRTAp8aqWEOR5SSU1w1JA2TbERbJoKSlspFkg=; b=euvQ9dlAW4SlQrfBQ58KE0KTdFC9975jmQIyqJ7R/xRk3YSest+aV2xeMfnkstSg6WYu AUL+XedZgclW1bZqOcZwHZ12Ka2yGMVupajlZNfcQ1gQGx2eTm707yWA2G80qHGnaaik llYVMqD/tFcyzMjKQPjOr7dPMz/t8BPqZ2TdZFDmY6KhdQjrrtwgrs5W3nRUXMb/hBgd hIQnLohZ0BZC1XvZR8D7YnUzyOlrfUztd5fIzZTkAZzqCDJWmQ7FcwqDmzVdS6dNRYif VOCESHXIiEIOro4yxFlYHFaqlSjXndwI8koeTgeK57w+YfPOgCV1qmDnbqem+YJz2hFf bQ== Received: from sc-exch02.marvell.com ([199.233.58.182]) by mx0b-0016f401.pphosted.com with ESMTP id 2wxn0wm224-17 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Tue, 17 Dec 2019 14:07:02 -0800 Received: from SC-EXCH03.marvell.com (10.93.176.83) by SC-EXCH02.marvell.com (10.93.176.82) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 17 Dec 2019 14:06:54 -0800 Received: from maili.marvell.com (10.93.176.43) by SC-EXCH03.marvell.com (10.93.176.83) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 17 Dec 2019 14:06:54 -0800 Received: from dut1171.mv.qlogic.com (unknown [10.112.88.18]) by maili.marvell.com (Postfix) with ESMTP id DC1A43F703F; Tue, 17 Dec 2019 14:06:54 -0800 (PST) Received: from dut1171.mv.qlogic.com (localhost [127.0.0.1]) by dut1171.mv.qlogic.com (8.14.7/8.14.7) with ESMTP id xBHM6som028175; Tue, 17 Dec 2019 14:06:54 -0800 Received: (from root@localhost) by dut1171.mv.qlogic.com (8.14.7/8.14.7/Submit) id xBHM6sQa028174; Tue, 17 Dec 2019 14:06:54 -0800 From: Himanshu Madhani To: , CC: , Subject: [PATCH 12/14] qla2xxx: Fix stuck session in GNL Date: Tue, 17 Dec 2019 14:06:15 -0800 Message-ID: <20191217220617.28084-13-hmadhani@marvell.com> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20191217220617.28084-1-hmadhani@marvell.com> References: <20191217220617.28084-1-hmadhani@marvell.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-17_04:2019-12-17,2019-12-17 signatures=0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Quinn Tran 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. Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani --- drivers/scsi/qla2xxx/qla_init.c | 15 +++++++++++++-- drivers/scsi/qla2xxx/qla_target.c | 21 +++++++++++++++------ 2 files changed, 28 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 4f849b12b546..a5076f43edea 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -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; diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 0ef76743a26d..97af678ed9e0 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -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);