From patchwork Wed Feb 3 18:40:14 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 8207091 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 65F66BEEE5 for ; Wed, 3 Feb 2016 18:40:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 69E1F202BE for ; Wed, 3 Feb 2016 18:40:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 475A120266 for ; Wed, 3 Feb 2016 18:40:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933858AbcBCSkX (ORCPT ); Wed, 3 Feb 2016 13:40:23 -0500 Received: from casper.infradead.org ([85.118.1.10]:59973 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933848AbcBCSkV (ORCPT ); Wed, 3 Feb 2016 13:40:21 -0500 Received: from chello080109146114.tirol.surfer.at ([80.109.146.114] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.85 #2 (Red Hat Linux)) id 1aR2Lj-00017E-Vb; Wed, 03 Feb 2016 18:40:20 +0000 From: Christoph Hellwig To: linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com, linux-ext4@vger.kernel.org, ocfs2-devel@oss.oracle.com Subject: [PATCH 1/3] direct-io: always call ->end_io if non-NULL Date: Wed, 3 Feb 2016 19:40:14 +0100 Message-Id: <1454524816-11392-2-git-send-email-hch@lst.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1454524816-11392-1-git-send-email-hch@lst.de> References: <1454524816-11392-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 See http://www.infradead.org/rpr.html This way we can pass back errors to the file system, and allow for cleanup required for all direct I/O invocations. Also allow the ->end_io handlers to return errors on their own, so that I/O completion errors can be passed on to the callers. Signed-off-by: Christoph Hellwig --- fs/dax.c | 9 +++++++-- fs/direct-io.c | 9 +++++++-- fs/ext4/inode.c | 9 +++++++-- fs/ocfs2/aops.c | 7 ++++++- fs/xfs/xfs_aops.c | 13 +++++++------ include/linux/fs.h | 2 +- 6 files changed, 35 insertions(+), 14 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 4fd6b0c..e38b2c5 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -267,8 +267,13 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode, if ((flags & DIO_LOCKING) && iov_iter_rw(iter) == READ) inode_unlock(inode); - if ((retval > 0) && end_io) - end_io(iocb, pos, retval, bh.b_private); + if (end_io) { + int err; + + err = end_io(iocb, pos, retval, bh.b_private); + if (err) + retval = err; + } if (!(flags & DIO_SKIP_DIO_COUNT)) inode_dio_end(inode); diff --git a/fs/direct-io.c b/fs/direct-io.c index 1b2f7ff..9c6f885 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -253,8 +253,13 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, if (ret == 0) ret = transferred; - if (dio->end_io && dio->result) - dio->end_io(dio->iocb, offset, transferred, dio->private); + if (dio->end_io) { + int err; + + err = dio->end_io(dio->iocb, offset, ret, dio->private); + if (err) + ret = err; + } if (!(dio->flags & DIO_SKIP_DIO_COUNT)) inode_dio_end(dio->inode); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 83bc8bf..9db04dd 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3161,14 +3161,17 @@ out: } #endif -static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, +static int ext4_end_io_dio(struct kiocb *iocb, loff_t offset, ssize_t size, void *private) { ext4_io_end_t *io_end = iocb->private; + if (size <= 0) + return 0; + /* if not async direct IO just return */ if (!io_end) - return; + return 0; ext_debug("ext4_end_io_dio(): io_end 0x%p " "for inode %lu, iocb 0x%p, offset %llu, size %zd\n", @@ -3179,6 +3182,8 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, io_end->offset = offset; io_end->size = size; ext4_put_io_end(io_end); + + return 0; } /* diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 794fd15..5dcc5f5 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -620,7 +620,7 @@ bail: * particularly interested in the aio/dio case. We use the rw_lock DLM lock * to protect io on one node from truncation on another. */ -static void ocfs2_dio_end_io(struct kiocb *iocb, +static int ocfs2_dio_end_io(struct kiocb *iocb, loff_t offset, ssize_t bytes, void *private) @@ -628,6 +628,9 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, struct inode *inode = file_inode(iocb->ki_filp); int level; + if (bytes <= 0) + return 0; + /* this io's submitter should not have unlocked this before we could */ BUG_ON(!ocfs2_iocb_is_rw_locked(iocb)); @@ -644,6 +647,8 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, level = ocfs2_iocb_rw_locked_level(iocb); ocfs2_rw_unlock(inode, level); } + + return 0; } static int ocfs2_releasepage(struct page *page, gfp_t wait) diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 379c089..295aaff 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -1645,7 +1645,7 @@ out_end_io: * case the completion can be called in interrupt context, whereas if we have an * ioend we will always be called in task context (i.e. from a workqueue). */ -STATIC void +STATIC int xfs_end_io_direct_write( struct kiocb *iocb, loff_t offset, @@ -1655,15 +1655,19 @@ xfs_end_io_direct_write( struct inode *inode = file_inode(iocb->ki_filp); struct xfs_ioend *ioend = private; + if (size <= 0) + return 0; + trace_xfs_gbmap_direct_endio(XFS_I(inode), offset, size, ioend ? ioend->io_type : 0, NULL); if (!ioend) { ASSERT(offset + size <= i_size_read(inode)); - return; + return 0; } __xfs_end_io_direct_write(inode, ioend, offset, size); + return 0; } static inline ssize_t @@ -1672,10 +1676,7 @@ xfs_vm_do_dio( struct kiocb *iocb, struct iov_iter *iter, loff_t offset, - void (*endio)(struct kiocb *iocb, - loff_t offset, - ssize_t size, - void *private), + dio_iodone_t endio, int flags) { struct block_device *bdev; diff --git a/include/linux/fs.h b/include/linux/fs.h index 1a20462..d7f37bf 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -70,7 +70,7 @@ extern int sysctl_protected_hardlinks; struct buffer_head; typedef int (get_block_t)(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); -typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset, +typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset, ssize_t bytes, void *private); typedef void (dax_iodone_t)(struct buffer_head *bh_map, int uptodate);