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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 626D3C4724C for ; Thu, 30 Apr 2020 15:29:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D2B020873 for ; Thu, 30 Apr 2020 15:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588260586; bh=+7stvbRXpQVUkXk15QehAQ5AasMDc5ML34h1TrM4Ekk=; h=From:To:Cc:Subject:Date:List-ID:From; b=AP6CtJcJWPrSZsMrzr+47qq8yud+oNvppcUWzDU/0pL8LtHOHOFkdCmoBnHSxDJKp hcN4PBD+BMFyjbNKR5qGP9aqSQ1ALlgWmlyxYFonfbq5FT9Bv2OrWb5twIfnCAFJ2u yklP6TkkuQgLX38Y8oHIFU0KGPqYIU85A8dCUZog= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726757AbgD3P3p (ORCPT ); Thu, 30 Apr 2020 11:29:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:35912 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726619AbgD3P3p (ORCPT ); Thu, 30 Apr 2020 11:29:45 -0400 Received: from localhost (unknown [213.57.247.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EAB982076D; Thu, 30 Apr 2020 15:29:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588260584; bh=+7stvbRXpQVUkXk15QehAQ5AasMDc5ML34h1TrM4Ekk=; h=From:To:Cc:Subject:Date:From; b=yL6DSAc/YwDwnCFockKSMMD+ZRZlQ79m/BvHrk+E6N0meTaTomUHQ38bAhAeLY7+r BPJmpKUEk4pyzmSgxN8oAc6Jo1sZP6SyF8U7TkrLJpa+VaB1ILHUT0KvzfMCicF3QW 8BBJ5qfBFrUJWCFwgtyTb79ch04uxCHTSgRoMSlg= From: Leon Romanovsky To: Doug Ledford , Jason Gunthorpe Cc: Leon Romanovsky , linux-rdma@vger.kernel.org Subject: [PATCH rdma-next] RDMA/ucma: Return stable IB device index as identifier Date: Thu, 30 Apr 2020 18:29:39 +0300 Message-Id: <20200430152939.77967-1-leon@kernel.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Leon Romanovsky The librdmacm uses node_guid as identifier to correlate between IB devices and CMA devices. However FW resets cause to such "connection" to be lost and require from the user to restart its application. Extend UCMA to return IB device index, which is stable identifier. Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/ucma.c | 16 +++++++++------- include/uapi/rdma/rdma_user_cm.h | 2 ++ 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c index 99482dc5934b..d5723465478e 100644 --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -848,7 +848,7 @@ static ssize_t ucma_query_route(struct ucma_file *file, struct sockaddr *addr; int ret = 0; - if (out_len < sizeof(resp)) + if (out_len < offsetof(struct rdma_ucm_query_route_resp, ibdev_index)) return -ENOSPC; if (copy_from_user(&cmd, inbuf, sizeof(cmd))) @@ -872,6 +872,7 @@ static ssize_t ucma_query_route(struct ucma_file *file, goto out; resp.node_guid = (__force __u64) ctx->cm_id->device->node_guid; + resp.ibdev_index = ctx->cm_id->device->index; resp.port_num = ctx->cm_id->port_num; if (rdma_cap_ib_sa(ctx->cm_id->device, ctx->cm_id->port_num)) @@ -883,8 +884,8 @@ static ssize_t ucma_query_route(struct ucma_file *file, out: mutex_unlock(&ctx->mutex); - if (copy_to_user(u64_to_user_ptr(cmd.response), - &resp, sizeof(resp))) + if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, + min_t(size_t, out_len, sizeof(resp)))) ret = -EFAULT; ucma_put_ctx(ctx); @@ -898,6 +899,7 @@ static void ucma_query_device_addr(struct rdma_cm_id *cm_id, return; resp->node_guid = (__force __u64) cm_id->device->node_guid; + resp->ibdev_index = cm_id->device->index; resp->port_num = cm_id->port_num; resp->pkey = (__force __u16) cpu_to_be16( ib_addr_get_pkey(&cm_id->route.addr.dev_addr)); @@ -910,7 +912,7 @@ static ssize_t ucma_query_addr(struct ucma_context *ctx, struct sockaddr *addr; int ret = 0; - if (out_len < sizeof(resp)) + if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) return -ENOSPC; memset(&resp, 0, sizeof resp); @@ -925,7 +927,7 @@ static ssize_t ucma_query_addr(struct ucma_context *ctx, ucma_query_device_addr(ctx->cm_id, &resp); - if (copy_to_user(response, &resp, sizeof(resp))) + if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) ret = -EFAULT; return ret; @@ -977,7 +979,7 @@ static ssize_t ucma_query_gid(struct ucma_context *ctx, struct sockaddr_ib *addr; int ret = 0; - if (out_len < sizeof(resp)) + if (out_len < offsetof(struct rdma_ucm_query_addr_resp, ibdev_index)) return -ENOSPC; memset(&resp, 0, sizeof resp); @@ -1010,7 +1012,7 @@ static ssize_t ucma_query_gid(struct ucma_context *ctx, &ctx->cm_id->route.addr.dst_addr); } - if (copy_to_user(response, &resp, sizeof(resp))) + if (copy_to_user(response, &resp, min_t(size_t, out_len, sizeof(resp)))) ret = -EFAULT; return ret; diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h index e545f2de1e13..14d48b462d91 100644 --- a/include/uapi/rdma/rdma_user_cm.h +++ b/include/uapi/rdma/rdma_user_cm.h @@ -168,6 +168,7 @@ struct rdma_ucm_query_route_resp { __u32 num_paths; __u8 port_num; __u8 reserved[3]; + __u32 ibdev_index; }; struct rdma_ucm_query_addr_resp { @@ -179,6 +180,7 @@ struct rdma_ucm_query_addr_resp { __u16 dst_size; struct __kernel_sockaddr_storage src_addr; struct __kernel_sockaddr_storage dst_addr; + __u32 ibdev_index; }; struct rdma_ucm_query_path_resp { -- 2.26.2