From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 749F9FF885C for ; Fri, 24 Apr 2026 22:42:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=E09dOn9ADG8OwTD8WVqq6oMOalW+1VMCECVk65HZSAg=; b=P2W+uVFdrYQ+DMwBJasEBPQ6io EJY1DDgRrQz1Mx/d6ZjD0Q/RyBd27UJo0kKVykAcOmI+JPvZGUBHrrGeU4Ocb3yALgYGUk5+xOxjY UrXt5AT+RGFgkMjXA3VlN/XQRHT+tgHZox6ZYekauUJLtb0x9cHm6JF0gVduvfWK6OCe0wqXB+ml3 3DCxrrVieoYMO89Mdkt23cnlBrfgnioCPuXTzuBQkEWhRz6bKAvnfg6H94v+LoD9zFZDVr3jjyqoN wWqRsnj1wudsUUtimtT1OrboecGJw+eA8cbuMARfWFBFgp8VsItm0NCgoP+Dpr98EpsgXWhshJoIl TDJ8UtLg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGPEK-0000000Dpld-2ZTm; Fri, 24 Apr 2026 22:42:36 +0000 Received: from 011.lax.mailroute.net ([199.89.1.14]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wGPEI-0000000DpjR-0i5y for linux-nvme@lists.infradead.org; Fri, 24 Apr 2026 22:42:35 +0000 Received: from localhost (localhost [127.0.0.1]) by 011.lax.mailroute.net (Postfix) with ESMTP id 4g2Sdj72WCz1XLHZ6; Fri, 24 Apr 2026 22:42:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:mime-version:references:in-reply-to :x-mailer:message-id:date:date:subject:subject:from:from :received:received; s=mr01; t=1777070549; x=1779662550; bh=E09dO n9ADG8OwTD8WVqq6oMOalW+1VMCECVk65HZSAg=; b=TINU3I4H2sUD76hKNKY4E ecoby23j1sebYr9YdLWC84QOAwSnR532s/xlgMbuKsUERD68Wc/Yde3STcBuC2aM PE1dTANfXY87Pmyj/GfCobGbY5K0Ac1Y/fZlDe/Don3eNhficokWVCCKLTwd/aqU R7L728Af0KBajM4ZR0ih0HJgi0MYjuWHOUI8DpFHVAVSicyzWOCQAHvj4LolV6Ic 90dTPIsToA33MKr8vV32lmnisq3iTweuaPBnkUYUITJrip5Ut4hUMGLJzn2kmdTx GcaiNw8/nFvuEeiH2IKQgoJvUiX9uUMwh3agAMryRbQqkUuqQlA1WT7ZuisJTlad A== X-Virus-Scanned: by MailRoute Received: from 011.lax.mailroute.net ([127.0.0.1]) by localhost (011.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id BjifY1RZlGsy; Fri, 24 Apr 2026 22:42:29 +0000 (UTC) Received: from bvanassche.mtv.corp.google.com (unknown [104.135.180.219]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 011.lax.mailroute.net (Postfix) with ESMTPSA id 4g2SdV4kY2z1XLHYt; Fri, 24 Apr 2026 22:42:22 +0000 (UTC) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nvme@lists.infradead.org, Christoph Hellwig , Nitesh Shetty , Bart Van Assche Subject: [PATCH 05/12] block: Introduce accessor functions for copy offload bios Date: Fri, 24 Apr 2026 15:41:54 -0700 Message-ID: <20260424224201.1949243-6-bvanassche@acm.org> X-Mailer: git-send-email 2.54.0.rc2.544.gc7ae2d5bb8-goog In-Reply-To: <20260424224201.1949243-1-bvanassche@acm.org> References: <20260424224201.1949243-1-bvanassche@acm.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260424_154234_516544_A4AE3716 X-CRM114-Status: GOOD ( 12.88 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Make it easy for block drivers to iterate over the copy offload bios by providing accessor functions for the copy offloading bios. Signed-off-by: Bart Van Assche --- block/blk-copy.c | 47 ++++++++++++++++++++++++++++++++++++++++ include/linux/blk-copy.h | 4 ++++ 2 files changed, 51 insertions(+) diff --git a/block/blk-copy.c b/block/blk-copy.c index 459ed8581efc..f49a5f835b4a 100644 --- a/block/blk-copy.c +++ b/block/blk-copy.c @@ -7,6 +7,53 @@ #include #include =20 +static struct bio *__blk_next_copy_bio(struct request *rq, struct bio *p= rev_bio, + enum req_op op) +{ + struct bio *bio; + + if (prev_bio) { + bio =3D prev_bio->bi_next; + } else { + struct bio_copy_offload_ctx *copy_ctx =3D rq->bio->bi_copy_ctx; + + bio =3D copy_ctx->bios; + } + + for (; bio && bio_op(bio) !=3D op; bio =3D bio->bi_next) + ; + return bio; +} + +struct bio *blk_first_copy_bio(struct request *rq, enum req_op op) +{ + struct bio *bio =3D rq->bio; + + if (bio_op(bio) =3D=3D op) + return bio; + + return __blk_next_copy_bio(rq, NULL, op); +} +EXPORT_SYMBOL_GPL(blk_first_copy_bio); + +struct bio *blk_next_copy_bio(struct bio *bio) +{ + return __blk_next_copy_bio(NULL, bio, bio_op(bio)); +} +EXPORT_SYMBOL_GPL(blk_next_copy_bio); + +unsigned int blk_copy_bio_count(struct request *rq, enum req_op op) +{ + unsigned int count =3D 0; + + for (struct bio *bio =3D blk_first_copy_bio(rq, op); bio; + bio =3D blk_next_copy_bio(bio)) + count++; + + return count; +} +EXPORT_SYMBOL_GPL(blk_copy_bio_count); + /** * Tracks the state of a single onloaded copy operation. * @params: Data copy parameters. diff --git a/include/linux/blk-copy.h b/include/linux/blk-copy.h index 5e38cfc14a71..4c8435312752 100644 --- a/include/linux/blk-copy.h +++ b/include/linux/blk-copy.h @@ -43,4 +43,8 @@ struct bio_copy_offload_ctx { void (*translation_complete)(struct bio_copy_offload_ctx *ctx); }; =20 +struct bio *blk_first_copy_bio(struct request *rq, enum req_op op); +struct bio *blk_next_copy_bio(struct bio *bio); +unsigned int blk_copy_bio_count(struct request *rq, enum req_op op); + #endif /* __LINUX_BLK_COPY_H */