From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9175C11F66 for ; Tue, 29 Jun 2021 12:49:16 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7748861D06 for ; Tue, 29 Jun 2021 12:49:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7748861D06 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=marvell.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=I6fr+rlOumBRZ/kEdCe+xa8sQyklMmV08yDcrQ5aPgI=; b=esl7OKDMetEdSZ /SPkdutJm4C7Eo3nAp/DNzMglI43HIv2qnEK80Q/oogl9rPTqiX1NKAO+/jsuNJYvEy6j8/OvkW3g kfB2p1v0hcouMJBTzyUhE1J/dmdP4JXaiU3KTUNH+3MSSZv+kGpTEXkK0Nq9aeqyUkqlNHBTkYz2j /QO2dD1ISEv7wccn/zWHi8yROM91rFuLyWh2OtgOrQQ0U0dcHJBFppgpzwGWoo7sum6kzGItIrLGZ tgPDLKHVD1KKJRvGCM21112gPilPcfTFnIS5WBOnXUDAIvNtaxXLZFpz5UJYBfndc/EKPlTc1SFaL h2sRMuLrslAqJt6V5Gdg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lyDAm-00AsPM-6Y; Tue, 29 Jun 2021 12:49:04 +0000 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lyDA0-00AsDm-Er for linux-nvme@lists.infradead.org; Tue, 29 Jun 2021 12:48:18 +0000 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 15TCjMHd014042; Tue, 29 Jun 2021 05:48:11 -0700 Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0b-0016f401.pphosted.com with ESMTP id 39f964duke-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Tue, 29 Jun 2021 05:48:11 -0700 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Tue, 29 Jun 2021 05:48:08 -0700 Received: from lbtlvb-pcie154.il.qlogic.org (10.69.176.80) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server id 15.0.1497.18 via Frontend Transport; Tue, 29 Jun 2021 05:48:05 -0700 From: Prabhakar Kushwaha To: , , , , CC: , , , , , , , , , Dean Balandin Subject: [PATCH v4 04/20] nvme-tcp-offload: Add device scan implementation Date: Tue, 29 Jun 2021 15:47:27 +0300 Message-ID: <20210629124743.6898-5-pkushwaha@marvell.com> X-Mailer: git-send-email 2.16.6 In-Reply-To: <20210629124743.6898-1-pkushwaha@marvell.com> References: <20210629124743.6898-1-pkushwaha@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: _YhIiMi04Mu2XIi6s732PlLO5bvO-l5v X-Proofpoint-GUID: _YhIiMi04Mu2XIi6s732PlLO5bvO-l5v X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-06-29_06:2021-06-28, 2021-06-29 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210629_054816_660286_660AED44 X-CRM114-Status: GOOD ( 17.64 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Dean Balandin As part of create_ctrl(), it scans the registered devices and calls the claim_dev op on each of them, to find the first devices that matches the connection params. Once the correct devices is found (claim_dev returns true), we raise the refcnt of that device and return that device as the device to be used for ctrl currently being created. Acked-by: Igor Russkikh Signed-off-by: Dean Balandin Signed-off-by: Prabhakar Kushwaha Signed-off-by: Omkar Kulkarni Signed-off-by: Michal Kalderon Signed-off-by: Ariel Elior Signed-off-by: Shai Malin Reviewed-by: Himanshu Madhani Reviewed-by: Hannes Reinecke --- drivers/nvme/host/tcp-offload.c | 91 +++++++++++++++++++++++++++++++++ drivers/nvme/host/tcp-offload.h | 1 + 2 files changed, 92 insertions(+) diff --git a/drivers/nvme/host/tcp-offload.c b/drivers/nvme/host/tcp-offload.c index 10b87f5b875b..d0f4b83549b9 100644 --- a/drivers/nvme/host/tcp-offload.c +++ b/drivers/nvme/host/tcp-offload.c @@ -13,6 +13,11 @@ static LIST_HEAD(nvme_tcp_ofld_devices); static DEFINE_MUTEX(nvme_tcp_ofld_devices_mutex); +static inline struct nvme_tcp_ofld_ctrl *to_tcp_ofld_ctrl(struct nvme_ctrl *nc) +{ + return container_of(nc, struct nvme_tcp_ofld_ctrl, nctrl); +} + /** * nvme_tcp_ofld_register_dev() - NVMeTCP Offload Library registration * function. @@ -96,6 +101,91 @@ void nvme_tcp_ofld_req_done(struct nvme_tcp_ofld_req *req, /* Placeholder - complete request with/without error */ } +static struct nvme_tcp_ofld_dev * +nvme_tcp_ofld_lookup_dev(struct nvme_tcp_ofld_ctrl *ctrl) +{ + struct nvme_ctrl *nctrl = &ctrl->nctrl; + struct nvme_tcp_ofld_dev *dev; + char *iface; + + if (nctrl->opts->mask & NVMF_OPT_HOST_IFACE) { + iface = nctrl->opts->host_iface; + ctrl->ndev = __dev_get_by_name(&init_net, iface); + if (!ctrl->ndev) { + pr_err("invalid interface passed: %s\n", iface); + return NULL; + } + } + + mutex_lock(&nvme_tcp_ofld_devices_mutex); + list_for_each_entry(dev, &nvme_tcp_ofld_devices, entry) { + /* ctrl includes the destination ip, source ip (if provided) and + * network interface (if provided). + */ + if (dev->ops->claim_dev(dev, ctrl)) + goto out; + } + + dev = NULL; +out: + mutex_unlock(&nvme_tcp_ofld_devices_mutex); + + return dev; +} + +static struct nvme_ctrl * +nvme_tcp_ofld_create_ctrl(struct device *ndev, struct nvmf_ctrl_options *opts) +{ + struct nvme_tcp_ofld_ctrl *ctrl; + struct nvme_tcp_ofld_dev *dev; + struct nvme_ctrl *nctrl; + int rc = 0; + + ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return ERR_PTR(-ENOMEM); + + nctrl = &ctrl->nctrl; + + /* Init nvme_tcp_ofld_ctrl & nvme_ctrl params based on received opts */ + + /* Find device that can reach the dest addr */ + dev = nvme_tcp_ofld_lookup_dev(ctrl); + if (!dev) { + pr_info("no device found for addr %s:%s.\n", + opts->traddr, opts->trsvcid); + rc = -EINVAL; + goto out_free_ctrl; + } + + /* Increase driver refcnt */ + if (!try_module_get(dev->ops->module)) { + pr_err("try_module_get failed\n"); + rc = -ENODEV; + goto out_free_ctrl; + } + + ctrl->dev = dev; + + if (ctrl->dev->ops->max_hw_sectors) + nctrl->max_hw_sectors = ctrl->dev->ops->max_hw_sectors; + if (ctrl->dev->ops->max_segments) + nctrl->max_segments = ctrl->dev->ops->max_segments; + + /* Init queues */ + + /* Call nvme_init_ctrl */ + + /* Setup ctrl */ + + return nctrl; + +out_free_ctrl: + kfree(ctrl); + + return ERR_PTR(rc); +} + static struct nvmf_transport_ops nvme_tcp_ofld_transport = { .name = "tcp_offload", .module = THIS_MODULE, @@ -105,6 +195,7 @@ static struct nvmf_transport_ops nvme_tcp_ofld_transport = { NVMF_OPT_RECONNECT_DELAY | NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | NVMF_OPT_NR_POLL_QUEUES | NVMF_OPT_TOS | NVMF_OPT_HOST_IFACE, + .create_ctrl = nvme_tcp_ofld_create_ctrl, }; static int __init nvme_tcp_ofld_init_module(void) diff --git a/drivers/nvme/host/tcp-offload.h b/drivers/nvme/host/tcp-offload.h index bfa759177a07..d1c2c6171897 100644 --- a/drivers/nvme/host/tcp-offload.h +++ b/drivers/nvme/host/tcp-offload.h @@ -8,6 +8,7 @@ #include #include #include +#include /* Driver includes */ #include "nvme.h" -- 2.24.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme