From patchwork Fri Oct 20 19:06:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Karan Tilak Kumar \(kartilak\)" X-Patchwork-Id: 736847 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B706C004C0 for ; Fri, 20 Oct 2023 19:08:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232946AbjJTTIE (ORCPT ); Fri, 20 Oct 2023 15:08:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54828 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230026AbjJTTHX (ORCPT ); Fri, 20 Oct 2023 15:07:23 -0400 Received: from rcdn-iport-4.cisco.com (rcdn-iport-4.cisco.com [173.37.86.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0090BD5B; Fri, 20 Oct 2023 12:07:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3648; q=dns/txt; s=iport; t=1697828841; x=1699038441; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ZMSQe9mdkW5xEKe9HP1NH7xCq2D6OUVO+7WD8rJZ7u0=; b=lhohRmS60e/Vg440/KZF5ZY/jxy89lv6ByO8Pm3hzfOvhEkDuxFHbH+y V2H44oKEuw6F490w69/vbPULLA05Ce66hObGjaEOM07yemvbPgNG+8Ta0 ZutBpkenT4B7lBG34s2neO27QX0Tz48oyEYZ1k26GUwksH2UbSUSKqFU1 0=; X-CSE-ConnectionGUID: GwJxUmVuR2ONj7mAhNcViA== X-CSE-MsgGUID: 3aqJGy4lTFq9UWbB46EPYg== X-IronPort-AV: E=Sophos;i="6.03,239,1694736000"; d="scan'208";a="126820825" Received: from rcdn-core-11.cisco.com ([173.37.93.147]) by rcdn-iport-4.cisco.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2023 19:07:20 +0000 Received: from localhost.cisco.com ([10.193.101.253]) (authenticated bits=0) by rcdn-core-11.cisco.com (8.15.2/8.15.2) with ESMTPSA id 39KJ6XPN026372 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 20 Oct 2023 19:07:19 GMT From: Karan Tilak Kumar To: sebaddel@cisco.com Cc: arulponn@cisco.com, djhawar@cisco.com, gcboffa@cisco.com, mkai2@cisco.com, satishkh@cisco.com, jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Karan Tilak Kumar Subject: [PATCH 11/13] scsi: fnic: Use fnic_lock to protect fnic structures in queuecommand Date: Fri, 20 Oct 2023 12:06:27 -0700 Message-Id: <20231020190629.338623-12-kartilak@cisco.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20231020190629.338623-1-kartilak@cisco.com> References: <20231020190629.338623-1-kartilak@cisco.com> MIME-Version: 1.0 X-Authenticated-User: kartilak@cisco.com X-Outbound-SMTP-Client: 10.193.101.253, [10.193.101.253] X-Outbound-Node: rcdn-core-11.cisco.com Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org fnic does not use host_lock. fnic uses fnic_lock. Use fnic lock to protect fnic members in fnic_queuecommand. Add log messages in error cases. Reviewed-by: Sesidhar Baddela Reviewed-by: Arulprabhu Ponnusamy Signed-off-by: Karan Tilak Kumar --- drivers/scsi/fnic/fnic_scsi.c | 28 +++++++++++++++++++++++++--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c index 9a1beb3e7269..ffdbdbfcdf57 100644 --- a/drivers/scsi/fnic/fnic_scsi.c +++ b/drivers/scsi/fnic/fnic_scsi.c @@ -424,14 +424,27 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc) int io_lock_acquired = 0; struct fc_rport_libfc_priv *rp; - if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) + spin_lock_irqsave(&fnic->fnic_lock, flags); + + if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, + "fnic<%d>: %s: %d: fnic IO blocked flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", + fnic->fnic_num, __func__, __LINE__, fnic->state_flags); return SCSI_MLQUEUE_HOST_BUSY; + } - if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) + if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, + "fnic<%d>: %s: %d: fnic flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", + fnic->fnic_num, __func__, __LINE__, fnic->state_flags); return SCSI_MLQUEUE_HOST_BUSY; + } rport = starget_to_rport(scsi_target(sc->device)); if (!rport) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "returning DID_NO_CONNECT for IO as rport is NULL\n"); sc->result = DID_NO_CONNECT << 16; @@ -441,6 +454,7 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc) ret = fc_remote_port_chkready(rport); if (ret) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "rport is not ready\n"); atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); @@ -451,6 +465,7 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc) rp = rport->dd_data; if (!rp || rp->rp_state == RPORT_ST_DELETE) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "rport 0x%x removed, returning DID_NO_CONNECT\n", rport->port_id); @@ -462,6 +477,7 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc) } if (rp->rp_state != RPORT_ST_READY) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", rport->port_id, rp->rp_state); @@ -471,11 +487,17 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc) return 0; } - if (lp->state != LPORT_ST_READY || !(lp->link_up)) + if (lp->state != LPORT_ST_READY || !(lp->link_up)) { + spin_unlock_irqrestore(&fnic->fnic_lock, flags); + FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, + "fnic<%d>: %s: %d: state not ready: %d/link not up: %d Returning HOST_BUSY\n", + fnic->fnic_num, __func__, __LINE__, lp->state, lp->link_up); return SCSI_MLQUEUE_HOST_BUSY; + } atomic_inc(&fnic->in_flight); + spin_unlock_irqrestore(&fnic->fnic_lock, flags); fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED; fnic_priv(sc)->flags = FNIC_NO_FLAGS;