From patchwork Fri Oct 30 13:51:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naohiro Aota X-Patchwork-Id: 11869609 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 EF4D361C for ; Fri, 30 Oct 2020 13:52:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3DC62071A for ; Fri, 30 Oct 2020 13:52:25 +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="GAU34rI2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726676AbgJ3NwX (ORCPT ); Fri, 30 Oct 2020 09:52:23 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:21969 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726653AbgJ3NwX (ORCPT ); Fri, 30 Oct 2020 09:52:23 -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=1604065942; x=1635601942; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ackO2U078tN9hfYqk2z+v2pR975Co+JjTSV3v7Aa2mk=; b=GAU34rI2G96fj19NKqdmyC53f/qye5F6PXur287OpTxPkMaA4uYioSWV xCVumwpaNbraXqZ1aNIPrXH6LjQJxvnW6cC7YUNOMro6xN7sCTlFDFQvO 5Oye02kBvVIx8EoEJdo7My7XiplHoUBKgOFiezEalU0YouRa9WMWCRi1o 1icyiy2EQ5KCdPBzFfUgfiVNikhV8crQjP2x4xu/c07mEzfp4G2yGLDWY BZ+1SJyI1W7g6S/3oz3P7gdWWf9wEng3FliCYp5sPXyqTP+LcMURS2ogO 9QQQ7iGaIA2E2ss+fEzc3lZYQmWYZ0+FU+HNNfYltVWNQdM0ufzZIqKU4 w==; IronPort-SDR: TMRZ7m/tDq8oPWPzGgNux+0TpR/BWQkC6LBeDLEIeRYQBY2+N8HTHBD0gPLREeSLsYZ3NNAYuu +ddXrZKrQYMLQkrL6niGKWca8bedhfEjceTrp2ZUa3+pmwvJEafMpxD5U+RuSwmE8M9H/fVttM 6ziafYUEOIe+AVy6MeWBtEzNuvqiHjYakTfa2dECdBzJPDqM77b6kNaAnvXdeBiJGH05pbOWAW 0+J7yekPdVddZXj3xOFrHOY4q/6CshGg0Dq8huiZukZ1vZ6XMF9yhlVBfBpBU/X8QofK86jpPR 304= X-IronPort-AV: E=Sophos;i="5.77,433,1596470400"; d="scan'208";a="155806570" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 30 Oct 2020 21:52:21 +0800 IronPort-SDR: fMMweYDwB7dgqo3/fYFxnUQC4+t4W1iT4EUJWKruU4chME8ahLQznGjwJb6+ntBD+rvTJuhBZL 8oGIHbvCIfVu2T+PulVShbNdtaPqjfnJKunkgP7YdXiXRNFE/ykRvoDRRX3XfR84XvXzsod8iu VRdCg+wJWsqSbeIkDJp/OnohOZfoXGfYP9/vA4WumCXJv74eARYCw55qhIIqKWEe8QjTgifcm6 5rzNrROTN0SlQMWVA4EDcNpRiDcYn0ajLPIUjfkZarn77A8RpWzmxXFx0MxOPGgQzeo0X/iZri 9Lt8NREqpDCKXFvCNb6A6tH+ 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; 30 Oct 2020 06:38:36 -0700 IronPort-SDR: Xt/hPeHC+IE9nSr8qRAGPZRJHsMsv2hI+eBwSz63plbmPEhespV3GyA9N4m0ExHBUp2AzUIz63 1oqmN0U7O+OzXYl0piVeTwxiOjMRmZ328fCBkgWKLL1KgqU+e7NlqkJU1d5VqV5KXKuLVFfHk+ UA71hnvMJXDh7CgGxVAnlRHARKulZEk4mcDlroIM9MwAUtYL019kXmP6P/dIqoDTGlTtX5y7OR BgYa35fSqeBr0LpGltoHngPL0IhHXtFQ9KWYiLszzt3AoIKAsklTfTJw6yOWZ2u3Qi8Vl1sKNo rY4= WDCIronportException: Internal Received: from naota.dhcp.fujisawa.hgst.com ([10.149.52.155]) by uls-op-cesaip01.wdc.com with ESMTP; 30 Oct 2020 06:52:21 -0700 From: Naohiro Aota To: linux-btrfs@vger.kernel.org, dsterba@suse.com Cc: hare@suse.com, linux-fsdevel@vger.kernel.org, Johannes Thumshirn , Jens Axboe Subject: [PATCH v9 01/41] block: add bio_add_zone_append_page Date: Fri, 30 Oct 2020 22:51:08 +0900 Message-Id: X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@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 --- block/bio.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/bio.h | 2 ++ 2 files changed, 38 insertions(+) diff --git a/block/bio.c b/block/bio.c index 58d765400226..2dfe40be4d6b 100644 --- a/block/bio.c +++ b/block/bio.c @@ -853,6 +853,42 @@ 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. + */ +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; + + if (WARN_ON_ONCE(!bio->bi_disk)) + 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,