From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 2FA947F67 for ; Thu, 28 May 2015 18:46:14 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay2.corp.sgi.com (Postfix) with ESMTP id 1F07E304053 for ; Thu, 28 May 2015 16:46:14 -0700 (PDT) Received: from ipmail04.adl6.internode.on.net (ipmail04.adl6.internode.on.net [150.101.137.141]) by cuda.sgi.com with ESMTP id Haz2TkGpgMzf1er0 for ; Thu, 28 May 2015 16:46:12 -0700 (PDT) Received: from disappointment.disaster.area ([192.168.1.110] helo=disappointment) by dastard with esmtp (Exim 4.80) (envelope-from ) id 1Yy7Uy-0006cu-Bw for xfs@oss.sgi.com; Fri, 29 May 2015 09:46:04 +1000 Received: from dave by disappointment with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1Yy7Uy-00024k-Ai for xfs@oss.sgi.com; Fri, 29 May 2015 09:46:04 +1000 From: Dave Chinner Subject: [PATCH 7/8] xfs: add DAX IO path support Date: Fri, 29 May 2015 09:45:54 +1000 Message-Id: <1432856755-7859-8-git-send-email-david@fromorbit.com> In-Reply-To: <1432856755-7859-1-git-send-email-david@fromorbit.com> References: <1432856755-7859-1-git-send-email-david@fromorbit.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com From: Dave Chinner DAX does not do buffered IO (can't buffer direct access!) and hence all read/write IO is vectored through the direct IO path. Hence we need to add the DAX IO path callouts to the direct IO infrastructure. Signed-off-by: Dave Chinner Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- fs/xfs/xfs_aops.c | 36 +++++++++++++++++++++++++++--------- 1 file changed, 27 insertions(+), 9 deletions(-) diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 1d195e8..e5e9fc2 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -1657,6 +1657,29 @@ xfs_end_io_dax_write( void xfs_end_io_dax_write(struct buffer_head *bh, int uptodate) { } #endif +static inline ssize_t +xfs_vm_do_dio( + struct inode *inode, + struct kiocb *iocb, + struct iov_iter *iter, + loff_t offset, + void (*endio)(struct kiocb *iocb, + loff_t offset, + ssize_t size, + void *private), + int flags) +{ + struct block_device *bdev; + + if (IS_DAX(inode)) + return dax_do_io(iocb, inode, iter, offset, + xfs_get_blocks_direct, endio, 0); + + bdev = xfs_find_bdev_for_inode(inode); + return __blockdev_direct_IO(iocb, inode, bdev, iter, offset, + xfs_get_blocks_direct, endio, NULL, flags); +} + STATIC ssize_t xfs_vm_direct_IO( struct kiocb *iocb, @@ -1664,16 +1687,11 @@ xfs_vm_direct_IO( loff_t offset) { struct inode *inode = iocb->ki_filp->f_mapping->host; - struct block_device *bdev = xfs_find_bdev_for_inode(inode); - if (iov_iter_rw(iter) == WRITE) { - return __blockdev_direct_IO(iocb, inode, bdev, iter, offset, - xfs_get_blocks_direct, - xfs_end_io_direct_write, NULL, - DIO_ASYNC_EXTEND); - } - return __blockdev_direct_IO(iocb, inode, bdev, iter, offset, - xfs_get_blocks_direct, NULL, NULL, 0); + if (iov_iter_rw(iter) == WRITE) + return xfs_vm_do_dio(inode, iocb, iter, offset, + xfs_end_io_direct_write, DIO_ASYNC_EXTEND); + return xfs_vm_do_dio(inode, iocb, iter, offset, NULL, 0); } /* -- 2.0.0 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs