From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fernando Luis =?ISO-8859-1?Q?V=E1zquez?= Cao Subject: [PATCH 1/3] block: Add block_flush_device() Date: Mon, 16 Feb 2009 16:25:47 +0900 Message-ID: <1234769147.32677.19.camel@sebastian.kern.oss.ntt.co.jp> References: <1232109069.13775.35.camel@sebastian.kern.oss.ntt.co.jp> <1232114101.13775.63.camel@sebastian.kern.oss.ntt.co.jp> <20090116163039.GE10617@duck.suse.cz> <1232185639.4831.18.camel@sebastian.kern.oss.ntt.co.jp> <1232186449.4831.29.camel@sebastian.kern.oss.ntt.co.jp> <20090119120349.GA10193@duck.suse.cz> <1233135913.5399.57.camel@sebastian.kern.oss.ntt.co.jp> <20090128095518.GA16554@duck.suse.cz> <1234434811.15270.7.camel@sebastian.kern.oss.ntt.co.jp> <1234435245.15433.19.camel@sebastian.kern.oss.ntt.co.jp> <20090215224659.GG10706@mini-me.lan> <1234768181.32677.7.camel@sebastian.kern.oss.ntt.co.jp> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Jan Kara , Alan Cox , Pavel Machek , kernel list , Jens Axboe , sandeen@redhat.com, fernando@kic.ac.jp, rwheeler@redhat.com, linux-fsdevel@vger.kernel.org To: Theodore Tso Return-path: Received: from serv2.oss.ntt.co.jp ([222.151.198.100]:43004 "EHLO serv2.oss.ntt.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752058AbZBPHZv (ORCPT ); Mon, 16 Feb 2009 02:25:51 -0500 In-Reply-To: <1234768181.32677.7.camel@sebastian.kern.oss.ntt.co.jp> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: This patch adds a helper function that should be used by filesystems that need to flush the underlying block device on fsync()/fdatasync(). Signed-off-by: Fernando Luis Vazquez Cao --- diff -urNp linux-2.6.29-rc4-orig/fs/buffer.c linux-2.6.29-rc4/fs/buffer.c --- linux-2.6.29-rc4-orig/fs/buffer.c 2009-02-16 14:45:11.000000000 +0900 +++ linux-2.6.29-rc4/fs/buffer.c 2009-02-16 14:53:26.000000000 +0900 @@ -165,6 +165,17 @@ void end_buffer_write_sync(struct buffer put_bh(bh); } +/* Issue flush of write caches on the block device */ +int block_flush_device(struct super_block *sb) +{ + int ret = 0; + + ret = blkdev_issue_flush(sb->s_bdev, NULL); + + return (ret == -EOPNOTSUPP) ? 0 : ret; +} +EXPORT_SYMBOL(block_flush_device); + /* * Write out and wait upon all the dirty data associated with a block * device via its mapping. Does not take the superblock lock. diff -urNp linux-2.6.29-rc4-orig/include/linux/buffer_head.h linux-2.6.29-rc4/include/linux/buffer_head.h --- linux-2.6.29-rc4-orig/include/linux/buffer_head.h 2009-02-16 14:45:12.000000000 +0900 +++ linux-2.6.29-rc4/include/linux/buffer_head.h 2009-02-16 14:48:28.000000000 +0900 @@ -238,6 +238,7 @@ int nobh_write_end(struct file *, struct int nobh_truncate_page(struct address_space *, loff_t, get_block_t *); int nobh_writepage(struct page *page, get_block_t *get_block, struct writeback_control *wbc); +int block_flush_device(struct super_block *sb); void buffer_init(void);