From patchwork Wed Jan 30 21:55:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 10789359 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9FB62746 for ; Wed, 30 Jan 2019 23:02:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B633C2F985 for ; Wed, 30 Jan 2019 23:02:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A66AC2F983; Wed, 30 Jan 2019 23:02:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2C4FA2F983 for ; Wed, 30 Jan 2019 23:02:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725786AbfA3XCc (ORCPT ); Wed, 30 Jan 2019 18:02:32 -0500 Received: from mail-it1-f196.google.com ([209.85.166.196]:40262 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725817AbfA3XCc (ORCPT ); Wed, 30 Jan 2019 18:02:32 -0500 Received: by mail-it1-f196.google.com with SMTP id h193so1018203ita.5 for ; Wed, 30 Jan 2019 15:02:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tkb1muQx9x9KnElGaaM03AUkKIKh+AW+Xsb0ZQn8sQk=; b=V3q2anGQ6rEELwhKTQb00IAwJFjlRch0VbKZQYYD/x5RZGp7D4yiV8WdDlnyX3DfjD FxBTLZSwc0KIPOJPabyP4xTMsvYilbwY8BDS3MCnf5mNA8GTXYza65d5qET2l8b6SQyU QM2VQmMEjaYNighK1mpAr4bI6a/kJ6EpA1nMOAG3UCq1ZUGaodskOK/oQPEjO9HqnfEz Vr+Y62JXGsr9GA+qBGU0J2T6akRfNSpJj4WUTQ04yOd6Nis+qyFdk1eiMCKCFavwyHoy K8vi/Bv47418gbmubE404Wy+/6AbHm6Kq3ewmhZPhptMQI4scYHPJF5hqB7Cv1AaBt/h J+Cg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=tkb1muQx9x9KnElGaaM03AUkKIKh+AW+Xsb0ZQn8sQk=; b=NGzbCj0z/EQgqbp5SeSzsMXQi/ICuIT/2L0odhO0U5IgsaeSr6O7eAS9jE/vftTTSZ r19KcQxvsB0Ag4xBlrrhAvpqb8FAWXEhS9I7zECC9yzEJlpQsQT3KbqAyspbQjzHsjwd AdlDl449qQ3JVzWG6nokxgPDeE2eiAWjYZyEUj9Ls+70zC/XWsEqzYI/GkMpU8FsEMOm UjryPgndkSbvp2kiMQKKDYmkzv8XxsVF99idjO5f7O/zUZftsC5ao+opSg+uEXCyrzZw 9nuZw7NRO98+S8KiBWVdagrXa6+Zm88sNLY+za9/OucjQkiGLgazeO9vtmGHREykGchI t6Nw== X-Gm-Message-State: AHQUAuZOhasX5N2IvXDOpJjkEZlawk4jJbw0Kz5+J61Z387wD/cx/J13 9QqVGQvMyCm9gkuyq6bxSRnt/A== X-Google-Smtp-Source: AHgI3IZdi7fBCIVHzj75FzM/0NsrHon9F+AxHWUv9LiWlBgES/+TKEG1NmeKPvnU8/f1Pe/RPP2cjQ== X-Received: by 2002:a24:45a2:: with SMTP id c34mr5144201itd.17.1548885351338; Wed, 30 Jan 2019 13:55:51 -0800 (PST) Received: from localhost.localdomain ([216.160.245.98]) by smtp.gmail.com with ESMTPSA id 189sm1805081itw.33.2019.01.30.13.55.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Jan 2019 13:55:50 -0800 (PST) From: Jens Axboe To: linux-aio@kvack.org, linux-block@vger.kernel.org, linux-api@vger.kernel.org Cc: hch@lst.de, jmoyer@redhat.com, avi@scylladb.com, jannh@google.com, Jens Axboe Subject: [PATCH 04/18] iomap: wire up the iopoll method Date: Wed, 30 Jan 2019 14:55:26 -0700 Message-Id: <20190130215540.20871-5-axboe@kernel.dk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190130215540.20871-1-axboe@kernel.dk> References: <20190130215540.20871-1-axboe@kernel.dk> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Christoph Hellwig Store the request queue the last bio was submitted to in the iocb private data in addition to the cookie so that we find the right block device. Also refactor the common direct I/O bio submission code into a nice little helper. Signed-off-by: Christoph Hellwig Modified to use bio_set_polled(). Signed-off-by: Jens Axboe --- fs/gfs2/file.c | 2 ++ fs/iomap.c | 43 ++++++++++++++++++++++++++++--------------- fs/xfs/xfs_file.c | 1 + include/linux/iomap.h | 1 + 4 files changed, 32 insertions(+), 15 deletions(-) diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index a2dea5bc0427..58a768e59712 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -1280,6 +1280,7 @@ const struct file_operations gfs2_file_fops = { .llseek = gfs2_llseek, .read_iter = gfs2_file_read_iter, .write_iter = gfs2_file_write_iter, + .iopoll = iomap_dio_iopoll, .unlocked_ioctl = gfs2_ioctl, .mmap = gfs2_mmap, .open = gfs2_open, @@ -1310,6 +1311,7 @@ const struct file_operations gfs2_file_fops_nolock = { .llseek = gfs2_llseek, .read_iter = gfs2_file_read_iter, .write_iter = gfs2_file_write_iter, + .iopoll = iomap_dio_iopoll, .unlocked_ioctl = gfs2_ioctl, .mmap = gfs2_mmap, .open = gfs2_open, diff --git a/fs/iomap.c b/fs/iomap.c index a3088fae567b..4ee50b76b4a1 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -1454,6 +1454,28 @@ struct iomap_dio { }; }; +int iomap_dio_iopoll(struct kiocb *kiocb, bool spin) +{ + struct request_queue *q = READ_ONCE(kiocb->private); + + if (!q) + return 0; + return blk_poll(q, READ_ONCE(kiocb->ki_cookie), spin); +} +EXPORT_SYMBOL_GPL(iomap_dio_iopoll); + +static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap, + struct bio *bio) +{ + atomic_inc(&dio->ref); + + if (dio->iocb->ki_flags & IOCB_HIPRI) + bio_set_polled(bio, dio->iocb); + + dio->submit.last_queue = bdev_get_queue(iomap->bdev); + dio->submit.cookie = submit_bio(bio); +} + static ssize_t iomap_dio_complete(struct iomap_dio *dio) { struct kiocb *iocb = dio->iocb; @@ -1566,7 +1588,7 @@ static void iomap_dio_bio_end_io(struct bio *bio) } } -static blk_qc_t +static void iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos, unsigned len) { @@ -1580,15 +1602,10 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos, bio->bi_private = dio; bio->bi_end_io = iomap_dio_bio_end_io; - if (dio->iocb->ki_flags & IOCB_HIPRI) - flags |= REQ_HIPRI; - get_page(page); __bio_add_page(bio, page, len, 0); bio_set_op_attrs(bio, REQ_OP_WRITE, flags); - - atomic_inc(&dio->ref); - return submit_bio(bio); + iomap_dio_submit_bio(dio, iomap, bio); } static loff_t @@ -1691,9 +1708,6 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length, bio_set_pages_dirty(bio); } - if (dio->iocb->ki_flags & IOCB_HIPRI) - bio->bi_opf |= REQ_HIPRI; - iov_iter_advance(dio->submit.iter, n); dio->size += n; @@ -1701,11 +1715,7 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length, copied += n; nr_pages = iov_iter_npages(&iter, BIO_MAX_PAGES); - - atomic_inc(&dio->ref); - - dio->submit.last_queue = bdev_get_queue(iomap->bdev); - dio->submit.cookie = submit_bio(bio); + iomap_dio_submit_bio(dio, iomap, bio); } while (nr_pages); /* @@ -1916,6 +1926,9 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, if (dio->flags & IOMAP_DIO_WRITE_FUA) dio->flags &= ~IOMAP_DIO_NEED_SYNC; + WRITE_ONCE(iocb->ki_cookie, dio->submit.cookie); + WRITE_ONCE(iocb->private, dio->submit.last_queue); + if (!atomic_dec_and_test(&dio->ref)) { if (!dio->wait_for_completion) return -EIOCBQUEUED; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index e47425071e65..60c2da41f0fc 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1203,6 +1203,7 @@ const struct file_operations xfs_file_operations = { .write_iter = xfs_file_write_iter, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, + .iopoll = iomap_dio_iopoll, .unlocked_ioctl = xfs_file_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = xfs_file_compat_ioctl, diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 9a4258154b25..0fefb5455bda 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -162,6 +162,7 @@ typedef int (iomap_dio_end_io_t)(struct kiocb *iocb, ssize_t ret, unsigned flags); ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, const struct iomap_ops *ops, iomap_dio_end_io_t end_io); +int iomap_dio_iopoll(struct kiocb *kiocb, bool spin); #ifdef CONFIG_SWAP struct file;