From patchwork Tue Nov 26 03:14:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Goldwyn Rodrigues X-Patchwork-Id: 11261349 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2A7B5109A for ; Tue, 26 Nov 2019 03:15:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 15B962071A for ; Tue, 26 Nov 2019 03:15:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727240AbfKZDPg (ORCPT ); Mon, 25 Nov 2019 22:15:36 -0500 Received: from mx2.suse.de ([195.135.220.15]:34172 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726016AbfKZDPg (ORCPT ); Mon, 25 Nov 2019 22:15:36 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 8BF60AE00; Tue, 26 Nov 2019 03:15:34 +0000 (UTC) From: Goldwyn Rodrigues To: linux-btrfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, hch@infradead.org, darrick.wong@oracle.com, fdmanana@kernel.org, Goldwyn Rodrigues Subject: [PATCH 2/5] iomap: add a filesystem hook for direct I/O bio submission Date: Mon, 25 Nov 2019 21:14:53 -0600 Message-Id: <20191126031456.12150-3-rgoldwyn@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20191126031456.12150-1-rgoldwyn@suse.de> References: <20191126031456.12150-1-rgoldwyn@suse.de> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Goldwyn Rodrigues This helps filesystems to perform tasks on the bio while submitting for I/O. This could be post-write operations such as data CRC or data replication for fs-handled RAID. Signed-off-by: Goldwyn Rodrigues Reviewed-by: Nikolay Borisov Reviewed-by: Johannes Thumshirn --- fs/iomap/direct-io.c | 14 +++++++++----- include/linux/iomap.h | 2 ++ 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index b77ec2acb066..2dac380f88a0 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -59,7 +59,7 @@ int iomap_dio_iopoll(struct kiocb *kiocb, bool spin) EXPORT_SYMBOL_GPL(iomap_dio_iopoll); static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap, - struct bio *bio) + struct bio *bio, loff_t pos) { atomic_inc(&dio->ref); @@ -67,7 +67,11 @@ static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap, bio_set_polled(bio, dio->iocb); dio->submit.last_queue = bdev_get_queue(iomap->bdev); - dio->submit.cookie = submit_bio(bio); + if (dio->dops && dio->dops->submit_io) + dio->submit.cookie = dio->dops->submit_io(bio, + dio->iocb->ki_filp, pos); + else + dio->submit.cookie = submit_bio(bio); } static ssize_t iomap_dio_complete(struct iomap_dio *dio) @@ -191,7 +195,7 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos, get_page(page); __bio_add_page(bio, page, len, 0); bio_set_op_attrs(bio, REQ_OP_WRITE, flags); - iomap_dio_submit_bio(dio, iomap, bio); + iomap_dio_submit_bio(dio, iomap, bio, pos); } static loff_t @@ -297,11 +301,11 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length, iov_iter_advance(dio->submit.iter, n); dio->size += n; - pos += n; copied += n; nr_pages = iov_iter_npages(&iter, BIO_MAX_PAGES); - iomap_dio_submit_bio(dio, iomap, bio); + iomap_dio_submit_bio(dio, iomap, bio, pos); + pos += n; } while (nr_pages); /* diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 8b09463dae0d..2b093a23ef1c 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -252,6 +252,8 @@ int iomap_writepages(struct address_space *mapping, struct iomap_dio_ops { int (*end_io)(struct kiocb *iocb, ssize_t size, int error, unsigned flags); + blk_qc_t (*submit_io)(struct bio *bio, struct file *file, + loff_t file_offset); }; ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,