From patchwork Tue Dec 22 03:48:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naohiro Aota X-Patchwork-Id: 11985721 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76870C433DB for ; Tue, 22 Dec 2020 03:52:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D06122D03 for ; Tue, 22 Dec 2020 03:52:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726140AbgLVDv4 (ORCPT ); Mon, 21 Dec 2020 22:51:56 -0500 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:46436 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725985AbgLVDv4 (ORCPT ); Mon, 21 Dec 2020 22:51:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1608609115; x=1640145115; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=L306P33jOLf6svdQjsNWRjnB1A6g8bi2oLYv7PhCk8Q=; b=aVT5Kx96tHE1qNQjCy4bxts3nw4AChhBDjpB5wD+0TqwKe5qr1EPFKqO ad783+vTj8gsrk84BfnjYxtwTk7Y0vZqi+j7LHrzJgltzEfXEaVxyEeTX 2AF3ppdO6agksF2zGgMYulrq4o70PM4PxwfrtzmGdzjpIMK0X1jusvV0w J57Lr50iBzPfrbfysPFe+H59usCW7YcE0Ri5wXZ2Au25nf8W2aAddO9Fi rUU5UFzsV6OHrTrvAcnx4BF9D3a+pUFQSnGIsxVvPrW82Kn4bdGzBY/oM ByYEL4JN/N3kEFgV9wiJ98l9n6kWv2JLqQ3ptlK361pC8gfz+cL3YI/MK A==; IronPort-SDR: LKVUfH7qy3sEpraGrWTv8g4AUCob/RKfpxWdVQepOkUoyng8PQewHWmNUsWGuOfDAfBZUfigWm rdZoZbEh1Htk4bVhyrr4Lpqok1VI/+Hy+IfV0i7SRXWFGXPQYiEsie0mp1VYmnmoLKgbJTg07R HtK5mDBUIUaA7/AuDI+ilfv/Udqi5padyrXt61tePuoHsM6yfecvbsRAGo597bA7EiI9E0wO8/ le7pYELt9CYB+4Ia72+HQvuMjVzryhpvH/K+gfV+EzjZlzfsIGkwBozmRqMFr7jGr+dAz/wSXq HDo= X-IronPort-AV: E=Sophos;i="5.78,438,1599494400"; d="scan'208";a="160193712" 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; 22 Dec 2020 11:50:25 +0800 IronPort-SDR: 97t3EwjmAaalN21XLHz8d1DgYPVYT9gnY9DM+keoTrlIro+Z1+tSmm+HDfDeHWrUsO310Iu5PZ /kZzF+LdYlCjKtluixs7dGR3Uz1ptN7INmJZ3zfAuhIRC8bh9cXilGUjmQPzag/f87Y9J5ouGQ qF7pe/3wuCZUl3P0qZnXqlf6k9LVhgVFdc3Ig3uMAUFtwHsGtZt524jZCAXtXHDd/jMDKYnbOA ytMS6UozYpMEXi60mLhvxJlgkdJIqfj8cqZkE95pknrsOSuoZn17isBz0ru8CkhimVYwrMOEQF JdYKqCdCAOjicPlv9+UpbfGQ Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Dec 2020 19:35:36 -0800 IronPort-SDR: WSzmHQsQjSWX+v/mV/UfsEFuvhb0X5ZTMurEBU7R5AB2njfaOsaebNAP4JE8W3MIUw3P20OjoQ 0Gjmp7i/pEgU8TtL3ST0T5XVn4BhTrgLYswLTI/BIxo2InOMwfh+1nUTuwsacqkl4CDQsOysTf mRqMi4/X9Z7tsi9//unIMT/90WIpOUUhwz1LqAimf13hBa7sVABAtJzXqemTrCUj/sxuOX14wj RspEfGjhPiRX5zGb1AZ7cxDIHPTroy4LS7E9jWOLwMcvJDlS4Dq3Mlm2wR2hPa4SdD3M4BkPeX qqc= WDCIronportException: Internal Received: from naota.dhcp.fujisawa.hgst.com ([10.149.52.155]) by uls-op-cesaip02.wdc.com with ESMTP; 21 Dec 2020 19:50:24 -0800 From: Naohiro Aota To: linux-btrfs@vger.kernel.org, dsterba@suse.com Cc: hare@suse.com, linux-fsdevel@vger.kernel.org, Jens Axboe , Christoph Hellwig , "Darrick J. Wong" , Johannes Thumshirn , Christoph Hellwig Subject: [PATCH v11 01/40] block: add bio_add_zone_append_page Date: Tue, 22 Dec 2020 12:48:54 +0900 Message-Id: <06add214bc16ef08214de1594ecdfcc4cdcdbd78.1608608848.git.naohiro.aota@wdc.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Johannes Thumshirn Add bio_add_zone_append_page(), a wrapper around bio_add_hw_page() which is intended to be used by file systems that directly add pages to a bio instead of using bio_iov_iter_get_pages(). Cc: Jens Axboe Signed-off-by: Johannes Thumshirn Reviewed-by: Christoph Hellwig Reviewed-by: Christoph Hellwig --- block/bio.c | 35 +++++++++++++++++++++++++++++++++++ include/linux/bio.h | 2 ++ 2 files changed, 37 insertions(+) diff --git a/block/bio.c b/block/bio.c index fa01bef35bb1..a6e482c8f43f 100644 --- a/block/bio.c +++ b/block/bio.c @@ -851,6 +851,41 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, } EXPORT_SYMBOL(bio_add_pc_page); +/** + * bio_add_zone_append_page - attempt to add page to zone-append bio + * @bio: destination bio + * @page: page to add + * @len: vec entry length + * @offset: vec entry offset + * + * Attempt to add a page to the bio_vec maplist of a bio that will be submitted + * for a zone-append request. This can fail for a number of reasons, such as the + * bio being full or the target block device is not a zoned block device or + * other limitations of the target block device. The target block device must + * allow bio's up to PAGE_SIZE, so it is always possible to add a single page + * to an empty bio. + * + * Returns: number of bytes added to the bio, or 0 in case of a failure. + */ +int bio_add_zone_append_page(struct bio *bio, struct page *page, + unsigned int len, unsigned int offset) +{ + struct request_queue *q; + bool same_page = false; + + if (WARN_ON_ONCE(bio_op(bio) != REQ_OP_ZONE_APPEND)) + return 0; + + q = bio->bi_disk->queue; + + if (WARN_ON_ONCE(!blk_queue_is_zoned(q))) + return 0; + + return bio_add_hw_page(q, bio, page, len, offset, + queue_max_zone_append_sectors(q), &same_page); +} +EXPORT_SYMBOL_GPL(bio_add_zone_append_page); + /** * __bio_try_merge_page - try appending data to an existing bvec. * @bio: destination bio diff --git a/include/linux/bio.h b/include/linux/bio.h index c6d765382926..7ef300cb4e9a 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -442,6 +442,8 @@ void bio_chain(struct bio *, struct bio *); extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int); extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *, unsigned int, unsigned int); +int bio_add_zone_append_page(struct bio *bio, struct page *page, + unsigned int len, unsigned int offset); bool __bio_try_merge_page(struct bio *bio, struct page *page, unsigned int len, unsigned int off, bool *same_page); void __bio_add_page(struct bio *bio, struct page *page,