From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 From: ira.weiny@intel.com 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> In-Reply-To: <20190809225833.6657-1-ira.weiny@intel.com> References: <20190809225833.6657-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs 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 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); -- 2.20.1