From patchwork Sun Apr 7 07:49:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leon Romanovsky X-Patchwork-Id: 1079896 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="bfsIJrOh"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44cQhN5QsPz9sQr for ; Sun, 7 Apr 2019 17:50:28 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726244AbfDGHu0 (ORCPT ); Sun, 7 Apr 2019 03:50:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:54124 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725942AbfDGHuZ (ORCPT ); Sun, 7 Apr 2019 03:50:25 -0400 Received: from localhost (unknown [193.47.165.251]) (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 E492921738; Sun, 7 Apr 2019 07:50:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554623424; bh=b9BLP3nkyRd9hAhpF+jey9d/bl9V/yuJ63PdOvpc2DM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bfsIJrOhu0DnBmlZayIbd8lGm9LBwGXrjZqiwneEBAXcyMVuAV1fcYVlEOKR6g1ev zIMtVvp7l7wa6CpdtrkDWJnPPdsCDKtZKxyzZj+lAJ0qN5XbjbkIPUHt7MaG/hD7WZ NOenatO0XpyeJrraifybdzNl56aERzqxaf30nfRk= From: Leon Romanovsky To: Doug Ledford , Jason Gunthorpe Cc: Leon Romanovsky , RDMA mailing list , Majd Dibbiny , Mark Zhang , Saeed Mahameed , linux-netdev Subject: [PATCH rdma-next v1 03/17] RDMA/restrack: Add an API to attach a task to a resource Date: Sun, 7 Apr 2019 10:49:59 +0300 Message-Id: <20190407075013.12955-4-leon@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190407075013.12955-1-leon@kernel.org> References: <20190407075013.12955-1-leon@kernel.org> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Mark Zhang Add rdma_restrack_attach_task() which is able to attach a task other then "current" to a resource. Signed-off-by: Mark Zhang Reviewed-by: Majd Dibbiny Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/restrack.c | 14 ++++++++++++++ drivers/infiniband/core/restrack.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c index 95573f292aae..3714634ae296 100644 --- a/drivers/infiniband/core/restrack.c +++ b/drivers/infiniband/core/restrack.c @@ -194,6 +194,20 @@ void rdma_restrack_set_task(struct rdma_restrack_entry *res, } EXPORT_SYMBOL(rdma_restrack_set_task); +/** + * rdma_restrack_attach_task() - attach the task onto this resource + * @res: resource entry + * @task: the task to attach, the current task will be used if it is NULL. + */ +void rdma_restrack_attach_task(struct rdma_restrack_entry *res, + struct task_struct *task) +{ + if (res->task) + put_task_struct(res->task); + get_task_struct(task); + res->task = task; +} + static void rdma_restrack_add(struct rdma_restrack_entry *res) { struct ib_device *dev = res_to_dev(res); diff --git a/drivers/infiniband/core/restrack.h b/drivers/infiniband/core/restrack.h index 09a1fbdf578e..d084e5f89849 100644 --- a/drivers/infiniband/core/restrack.h +++ b/drivers/infiniband/core/restrack.h @@ -25,4 +25,6 @@ struct rdma_restrack_root { int rdma_restrack_init(struct ib_device *dev); void rdma_restrack_clean(struct ib_device *dev); +void rdma_restrack_attach_task(struct rdma_restrack_entry *res, + struct task_struct *task); #endif /* _RDMA_CORE_RESTRACK_H_ */