From patchwork Fri Aug 9 22:58:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11088025 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5052D13B1 for ; Fri, 9 Aug 2019 22:59:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E81620602 for ; Fri, 9 Aug 2019 22:59:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 32F012223E; Fri, 9 Aug 2019 22:59:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D789020602 for ; Fri, 9 Aug 2019 22:59:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731226AbfHIW7m (ORCPT ); Fri, 9 Aug 2019 18:59:42 -0400 Received: from mga05.intel.com ([192.55.52.43]:23658 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730266AbfHIW7G (ORCPT ); Fri, 9 Aug 2019 18:59:06 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Aug 2019 15:59:06 -0700 X-IronPort-AV: E=Sophos;i="5.64,367,1559545200"; d="scan'208";a="375343545" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.157]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Aug 2019 15:59:05 -0700 From: ira.weiny@intel.com To: Andrew Morton Cc: Jason Gunthorpe , Dan Williams , Matthew Wilcox , Jan Kara , "Theodore Ts'o" , John Hubbard , Michal Hocko , Dave Chinner , linux-xfs@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-ext4@vger.kernel.org, linux-mm@kvack.org, Ira Weiny Subject: [RFC PATCH v2 16/19] RDMA/uverbs: Add back pointer to system file object Date: Fri, 9 Aug 2019 15:58:30 -0700 Message-Id: <20190809225833.6657-17-ira.weiny@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190809225833.6657-1-ira.weiny@intel.com> References: <20190809225833.6657-1-ira.weiny@intel.com> MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ira Weiny In order for MRs to be tracked against the open verbs context the ufile needs to have a pointer to hand to the GUP code. No references need to be taken as this should be valid for the lifetime of the context. Signed-off-by: Ira Weiny --- drivers/infiniband/core/uverbs.h | 1 + drivers/infiniband/core/uverbs_main.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h index 1e5aeb39f774..e802ba8c67d6 100644 --- a/drivers/infiniband/core/uverbs.h +++ b/drivers/infiniband/core/uverbs.h @@ -163,6 +163,7 @@ struct ib_uverbs_file { struct page *disassociate_page; struct xarray idr; + struct file *sys_file; /* backpointer to system file object */ }; struct ib_uverbs_event { diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 11c13c1381cf..002c24e0d4db 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -1092,6 +1092,7 @@ static int ib_uverbs_open(struct inode *inode, struct file *filp) INIT_LIST_HEAD(&file->umaps); filp->private_data = file; + file->sys_file = filp; list_add_tail(&file->list, &dev->uverbs_file_list); mutex_unlock(&dev->lists_mutex); srcu_read_unlock(&dev->disassociate_srcu, srcu_key);