From patchwork Thu Apr 1 17:08:41 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Hefty, Sean" X-Patchwork-Id: 90188 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o31H8iDS030454 for ; Thu, 1 Apr 2010 17:08:51 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757627Ab0DARIs (ORCPT ); Thu, 1 Apr 2010 13:08:48 -0400 Received: from mga11.intel.com ([192.55.52.93]:44648 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757610Ab0DARIs (ORCPT ); Thu, 1 Apr 2010 13:08:48 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP; 01 Apr 2010 10:08:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.51,349,1267430400"; d="scan'208";a="785809551" Received: from unknown (HELO msheftyMOBL2) ([10.254.108.159]) by fmsmga001.fm.intel.com with ESMTP; 01 Apr 2010 10:08:45 -0700 From: "Sean Hefty" To: "Hefty, Sean" , References: Subject: [PATCH 20/26] rdma/ucm: support querying when IB paths are not reversible Date: Thu, 1 Apr 2010 10:08:41 -0700 Message-ID: <434E4F8CE1004FBAB68DEC52624476A9@amr.corp.intel.com> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcrRtMZV7yVukZHyQqa3gseqBpR7/wABZWIQ In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Thu, 01 Apr 2010 17:08:52 +0000 (UTC) diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c index 2b6b51a..5d8d68e 100644 --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -696,6 +696,38 @@ static ssize_t ucma_query_addr(struct ucma_context *ctx, return ret; } +static ssize_t ucma_query_path(struct ucma_context *ctx, + void __user *response, int out_len) +{ + struct rdma_ucm_query_path_resp *resp; + int i, ret = 0; + + if (out_len < sizeof(*resp)) + return -ENOSPC; + + resp = kzalloc(out_len, GFP_KERNEL); + if (!resp) + return -ENOMEM; + + resp->num_paths = ctx->cm_id->route.num_paths; + for (i = 0, out_len -= sizeof(*resp); + i < resp->num_paths && out_len > sizeof(struct ib_path_rec_data); + i++, out_len -= sizeof(struct ib_path_rec_data)) { + + resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | + IB_PATH_BIDIRECTIONAL; + ib_sa_pack_path(&ctx->cm_id->route.path_rec[i], + &resp->path_data[i].path_rec); + } + + if (copy_to_user(response, resp, + sizeof(*resp) + (i * sizeof(struct ib_path_rec_data)))) + ret = -EFAULT; + + kfree(resp); + return ret; +} + static ssize_t ucma_query(struct ucma_file *file, const char __user *inbuf, int in_len, int out_len) @@ -717,6 +749,9 @@ static ssize_t ucma_query(struct ucma_file *file, case RDMA_USER_CM_QUERY_ADDR: ret = ucma_query_addr(ctx, response, out_len); break; + case RDMA_USER_CM_QUERY_PATH: + ret = ucma_query_path(ctx, response, out_len); + break; default: ret = -ENOSYS; break; diff --git a/include/rdma/rdma_user_cm.h b/include/rdma/rdma_user_cm.h index 9687b2f..7784203 100644 --- a/include/rdma/rdma_user_cm.h +++ b/include/rdma/rdma_user_cm.h @@ -115,7 +115,8 @@ struct rdma_ucm_resolve_route { }; enum { - RDMA_USER_CM_QUERY_ADDR + RDMA_USER_CM_QUERY_ADDR, + RDMA_USER_CM_QUERY_PATH }; struct rdma_ucm_query { @@ -145,6 +146,12 @@ struct rdma_ucm_query_addr_resp { struct sockaddr_storage dst_addr; }; +struct rdma_ucm_query_path_resp { + __u32 num_paths; + __u32 reserved; + struct ib_path_rec_data path_data[0]; +}; + struct rdma_ucm_conn_param { __u32 qp_num; __u32 reserved;