From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751833AbYH2XOE (ORCPT ); Fri, 29 Aug 2008 19:14:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752218AbYH2XNE (ORCPT ); Fri, 29 Aug 2008 19:13:04 -0400 Received: from g5t0009.atlanta.hp.com ([15.192.0.46]:3122 "EHLO g5t0009.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752095AbYH2XNC (ORCPT ); Fri, 29 Aug 2008 19:13:02 -0400 From: Andrew Patterson Subject: [PATCH 1/6] Wrapper for lower-level revalidate_disk routines. To: linux-scsi@vger.kernel.org Cc: andrew.patterson@hp.com, James.Bottomley@HansenPartnership.com, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, andmike@linux.vnet.ibm.com, mike.miller@hp.com, genanr@emsphone.com, jmoyer@redhat.com Date: Fri, 29 Aug 2008 17:13:00 -0600 Message-ID: <20080829231259.25065.79887.stgit@bluto.andrew> In-Reply-To: <20080829231254.25065.66052.stgit@bluto.andrew> References: <20080829231254.25065.66052.stgit@bluto.andrew> User-Agent: StGIT/0.14.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: AAAAAQAAAAI= X-Whitelist: TRUE Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Wrapper for lower-level revalidate_disk routines. This is a wrapper for the lower-level revalidate_disk call-backs such as sd_revalidate_disk(). It allows us to perform pre and post operations when calling them. We will use this wrapper in a later patch to adjust block device sizes after an online resize (a _post_ operation). Signed-off-by: Andrew Patterson --- fs/block_dev.c | 21 +++++++++++++++++++++ include/linux/fs.h | 1 + 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index aff5421..30bafca 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -868,6 +868,27 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode) EXPORT_SYMBOL(open_by_devnum); +/** + * revalidate_disk - wrapper for lower-level driver's revalidate_disk + * call-back + * + * @disk: struct gendisk to be revalidated + * + * This routine is a wrapper for lower-level driver's revalidate_disk + * call-backs. It is used to do common pre and post operations needed + * for all revalidate_disk operations. + */ +int revalidate_disk(struct gendisk *disk) +{ + int ret = 0; + + if (disk->fops->revalidate_disk) + ret = disk->fops->revalidate_disk(disk); + + return ret; +} +EXPORT_SYMBOL(revalidate_disk); + /* * This routine checks whether a removable media has been changed, * and invalidates all buffer-cache-entries in that case. This diff --git a/include/linux/fs.h b/include/linux/fs.h index 580b513..28756a9 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1718,6 +1718,7 @@ extern int fs_may_remount_ro(struct super_block *); */ #define bio_data_dir(bio) ((bio)->bi_rw & 1) +extern int revalidate_disk(struct gendisk *); extern int check_disk_change(struct block_device *); extern int __invalidate_device(struct block_device *); extern int invalidate_partition(struct gendisk *, int);