From patchwork Mon Apr 27 11:31:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 11511969 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 9A8C31392 for ; Mon, 27 Apr 2020 11:32:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 82588206B6 for ; Mon, 27 Apr 2020 11:32:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="Yoto8M4q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727108AbgD0Lc3 (ORCPT ); Mon, 27 Apr 2020 07:32:29 -0400 Received: from esa5.hgst.iphmx.com ([216.71.153.144]:54669 "EHLO esa5.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727087AbgD0LcY (ORCPT ); Mon, 27 Apr 2020 07:32:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1587987143; x=1619523143; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DntH3FOL+F2qJ4JB8bNfeHvJeRnIrbJq4X8RpN63JaA=; b=Yoto8M4qPNQgCbc+IqvOuBBrApwrt9o5HrPeeQNbM9ocRphq4EUShvk0 sunyl59ILAH+BQjcDR7tJ1g6U47/FSbscIJA0AoS6KQDYwZJS8zY6siuZ Vf0EqaDC3+YZN4xHweSHTRuNBtPkGaUwNqZuCjRgz20p6sQ+Cq1WJyCLE +YcThcMunDh5O+FJilnTZ/2yhEnUTdE16HiJjqKNKjcl2g//6UkDGptC+ W5/ebHo9RJe4Oyr6nOVyLGAEcAFGWVjkX9Xs6lKH/2daU5QxIafHc9EXc 2veIft4OBjujNRo7erYiv4WAQ8Nm4V34qOMvI+kxJoYKw5k9eeO4hPaY4 w==; IronPort-SDR: CFeN4TVPYrqNSFkUqkopv6CB17lSjO897oeRB/bYgvkhs995oKbs9QLDV5jH53Eh76gLBza2oV gfXk/ABsei+iWR6k9MLhiwcw1tgd2nqU/iS+ew78zAGI3+NMT9ng0uVqxljQi0Iv3nHjuBaC4D xdeJA9H6ndmEgWZl+DfiE8wRFiLyrwGPLvVIEHfRXC1dU0CbjK/VYNqK7f5+7qcmmUVahFYF7+ bRD3oFZty3pK0nAr/cgFLb9g1rZQLl7WcMzyZBvknhaeBvUCueDPyLmm2AiFphTl06OSukRWjc Gkc= X-IronPort-AV: E=Sophos;i="5.73,323,1583164800"; d="scan'208";a="136552043" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 27 Apr 2020 19:32:23 +0800 IronPort-SDR: WjSYjOL0HF4khqQ4VD4pHL+Q/9JBXmyLlfak+EEJp4t70xFVPTH1KlbBZEA2RczcYAQ5qNXw64 O/bTHzHqTCQPjL+IvAcM+LKe9bljAUCoY= Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Apr 2020 04:23:04 -0700 IronPort-SDR: qnZ+m6BGrkVN8e7G19Rgpc/vKbQ8ZrA7EKoUryCFxRF9iJCbP2xV6twI1jJx7wU27A0KcICSKB jQqlzKwmF1/g== WDCIronportException: Internal Received: from unknown (HELO redsun60.ssa.fujisawa.hgst.com) ([10.149.66.36]) by uls-op-cesaip01.wdc.com with ESMTP; 27 Apr 2020 04:32:22 -0700 From: Johannes Thumshirn To: Jens Axboe Cc: Christoph Hellwig , linux-block , Damien Le Moal , Keith Busch , "linux-scsi @ vger . kernel . org" , "Martin K . Petersen" , "linux-fsdevel @ vger . kernel . org" , Johannes Thumshirn Subject: [PATCH v8 11/11] zonefs: use REQ_OP_ZONE_APPEND for sync DIO Date: Mon, 27 Apr 2020 20:31:53 +0900 Message-Id: <20200427113153.31246-12-johannes.thumshirn@wdc.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200427113153.31246-1-johannes.thumshirn@wdc.com> References: <20200427113153.31246-1-johannes.thumshirn@wdc.com> MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Synchronous direct I/O to a sequential write only zone can be issued using the new REQ_OP_ZONE_APPEND request operation. As dispatching multiple BIOs can potentially result in reordering, we cannot support asynchronous IO via this interface. We also can only dispatch up to queue_max_zone_append_sectors() via the new zone-append method and have to return a short write back to user-space in case an IO larger than queue_max_zone_append_sectors() has been issued. Signed-off-by: Johannes Thumshirn Acked-by: Damien Le Moal --- fs/zonefs/super.c | 80 ++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 72 insertions(+), 8 deletions(-) diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c index 3ce9829a6936..0bf7009f50a2 100644 --- a/fs/zonefs/super.c +++ b/fs/zonefs/super.c @@ -20,6 +20,7 @@ #include #include #include +#include #include "zonefs.h" @@ -596,6 +597,61 @@ static const struct iomap_dio_ops zonefs_write_dio_ops = { .end_io = zonefs_file_write_dio_end_io, }; +static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from) +{ + struct inode *inode = file_inode(iocb->ki_filp); + struct zonefs_inode_info *zi = ZONEFS_I(inode); + struct block_device *bdev = inode->i_sb->s_bdev; + unsigned int max; + struct bio *bio; + ssize_t size; + int nr_pages; + ssize_t ret; + + nr_pages = iov_iter_npages(from, BIO_MAX_PAGES); + if (!nr_pages) + return 0; + + max = queue_max_zone_append_sectors(bdev_get_queue(bdev)); + max = ALIGN_DOWN(max << SECTOR_SHIFT, inode->i_sb->s_blocksize); + iov_iter_truncate(from, max); + + bio = bio_alloc_bioset(GFP_NOFS, nr_pages, &fs_bio_set); + if (!bio) + return -ENOMEM; + + bio_set_dev(bio, bdev); + bio->bi_iter.bi_sector = zi->i_zsector; + bio->bi_write_hint = iocb->ki_hint; + bio->bi_ioprio = iocb->ki_ioprio; + bio->bi_opf = REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE; + if (iocb->ki_flags & IOCB_DSYNC) + bio->bi_opf |= REQ_FUA; + + ret = bio_iov_iter_get_pages(bio, from); + if (unlikely(ret)) { + bio_io_error(bio); + return ret; + } + size = bio->bi_iter.bi_size; + task_io_account_write(ret); + + if (iocb->ki_flags & IOCB_HIPRI) + bio_set_polled(bio, iocb); + + ret = submit_bio_wait(bio); + + bio_put(bio); + + zonefs_file_write_dio_end_io(iocb, size, ret, 0); + if (ret >= 0) { + iocb->ki_pos += size; + return size; + } + + return ret; +} + /* * Handle direct writes. For sequential zone files, this is the only possible * write path. For these files, check that the user is issuing writes @@ -611,6 +667,8 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from) struct inode *inode = file_inode(iocb->ki_filp); struct zonefs_inode_info *zi = ZONEFS_I(inode); struct super_block *sb = inode->i_sb; + bool sync = is_sync_kiocb(iocb); + bool append = false; size_t count; ssize_t ret; @@ -619,7 +677,7 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from) * as this can cause write reordering (e.g. the first aio gets EAGAIN * on the inode lock but the second goes through but is now unaligned). */ - if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && !is_sync_kiocb(iocb) && + if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && !sync && (iocb->ki_flags & IOCB_NOWAIT)) return -EOPNOTSUPP; @@ -643,16 +701,22 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from) } /* Enforce sequential writes (append only) in sequential zones */ - mutex_lock(&zi->i_truncate_mutex); - if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && iocb->ki_pos != zi->i_wpoffset) { + if (zi->i_ztype == ZONEFS_ZTYPE_SEQ) { + mutex_lock(&zi->i_truncate_mutex); + if (iocb->ki_pos != zi->i_wpoffset) { + mutex_unlock(&zi->i_truncate_mutex); + ret = -EINVAL; + goto inode_unlock; + } mutex_unlock(&zi->i_truncate_mutex); - ret = -EINVAL; - goto inode_unlock; + append = sync; } - mutex_unlock(&zi->i_truncate_mutex); - ret = iomap_dio_rw(iocb, from, &zonefs_iomap_ops, - &zonefs_write_dio_ops, is_sync_kiocb(iocb)); + if (append) + ret = zonefs_file_dio_append(iocb, from); + else + ret = iomap_dio_rw(iocb, from, &zonefs_iomap_ops, + &zonefs_write_dio_ops, sync); if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && (ret > 0 || ret == -EIOCBQUEUED)) { if (ret > 0)