From patchwork Sat Oct 17 00:46:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 7421601 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9F7029F37F for ; Sat, 17 Oct 2015 00:52:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C3ED820634 for ; Sat, 17 Oct 2015 00:52:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E373D20630 for ; Sat, 17 Oct 2015 00:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751704AbbJQAwk (ORCPT ); Fri, 16 Oct 2015 20:52:40 -0400 Received: from mga09.intel.com ([134.134.136.24]:30496 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751380AbbJQAwj (ORCPT ); Fri, 16 Oct 2015 20:52:39 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP; 16 Oct 2015 17:52:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,691,1437462000"; d="scan'208";a="666087657" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.39]) by orsmga003.jf.intel.com with ESMTP; 16 Oct 2015 17:52:39 -0700 Subject: [RFC PATCH 1/2] block: introduce file_bd_inode() From: Dan Williams To: linux-nvdimm@lists.01.org Cc: Al Viro , kvm@vger.kernel.org Date: Fri, 16 Oct 2015 20:46:57 -0400 Message-ID: <20151017004653.2742.36299.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Similar to the file_inode() helper, provide a helper to lookup the inode for a raw block device itself. Cc: Al Viro Signed-off-by: Dan Williams --- fs/block_dev.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/block_dev.c b/fs/block_dev.c index 073bb57adab1..5277dd83d254 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -147,11 +147,16 @@ blkdev_get_block(struct inode *inode, sector_t iblock, return 0; } +static struct inode *file_bd_inode(struct file *file) +{ + return file->f_mapping->host; +} + static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset) { struct file *file = iocb->ki_filp; - struct inode *inode = file->f_mapping->host; + struct inode *inode = file_bd_inode(file); if (IS_DAX(inode)) return dax_do_io(iocb, inode, iter, offset, blkdev_get_block, @@ -329,7 +334,7 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping, */ static loff_t block_llseek(struct file *file, loff_t offset, int whence) { - struct inode *bd_inode = file->f_mapping->host; + struct inode *bd_inode = file_bd_inode(file); loff_t retval; mutex_lock(&bd_inode->i_mutex); @@ -340,7 +345,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int whence) int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync) { - struct inode *bd_inode = filp->f_mapping->host; + struct inode *bd_inode = file_bd_inode(filp); struct block_device *bdev = I_BDEV(bd_inode); int error; @@ -1579,14 +1584,14 @@ EXPORT_SYMBOL(blkdev_put); static int blkdev_close(struct inode * inode, struct file * filp) { - struct block_device *bdev = I_BDEV(filp->f_mapping->host); + struct block_device *bdev = I_BDEV(file_bd_inode(filp)); blkdev_put(bdev, filp->f_mode); return 0; } static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg) { - struct block_device *bdev = I_BDEV(file->f_mapping->host); + struct block_device *bdev = I_BDEV(file_bd_inode(file)); fmode_t mode = file->f_mode; /* @@ -1611,7 +1616,7 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg) ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from) { struct file *file = iocb->ki_filp; - struct inode *bd_inode = file->f_mapping->host; + struct inode *bd_inode = file_bd_inode(file); loff_t size = i_size_read(bd_inode); struct blk_plug plug; ssize_t ret; @@ -1643,7 +1648,7 @@ EXPORT_SYMBOL_GPL(blkdev_write_iter); ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to) { struct file *file = iocb->ki_filp; - struct inode *bd_inode = file->f_mapping->host; + struct inode *bd_inode = file_bd_inode(file); loff_t size = i_size_read(bd_inode); loff_t pos = iocb->ki_pos;