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Thu, 29 Sep 2022 21:23:08 +0900 (KST) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas5p2.samsung.com (KnoxPortal) with ESMTPA id 20220929121657epcas5p213b7a187fd77b0783adb4b9389579b44~ZU_21iE6w2731427314epcas5p2Q; Thu, 29 Sep 2022 12:16:57 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20220929121657epsmtrp2cdc61ec37973b43a2f5c47929c60e46d~ZU_20zlB81794617946epsmtrp2b; Thu, 29 Sep 2022 12:16:57 +0000 (GMT) X-AuditID: b6c32a4a-007ff70000019a35-34-63358e2c03df Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 46.43.14392.9BC85336; Thu, 29 Sep 2022 21:16:57 +0900 (KST) Received: from localhost.localdomain (unknown [107.110.206.5]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20220929121656epsmtip18e8b2a9c803d0c673f2d5d6e3dbbb534~ZU_1aCYLx3141831418epsmtip1n; Thu, 29 Sep 2022 12:16:56 +0000 (GMT) From: Anuj Gupta To: axboe@kernel.dk, hch@lst.de, kbusch@kernel.org Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, gost.dev@samsung.com, linux-scsi@vger.kernel.org, Kanchan Joshi , Anuj Gupta Subject: [PATCH for-next v11 08/13] block: extend functionality to map bvec iterator Date: Thu, 29 Sep 2022 17:36:27 +0530 Message-Id: <20220929120632.64749-9-anuj20.g@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220929120632.64749-1-anuj20.g@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrEJsWRmVeSWpSXmKPExsWy7bCmpq5On2mywYJr6hZNE/4yW6y+289m cfPATiaLlauPMlm8az3HYnH0/1s2i0mHrjFa7L2lbTF/2VN2i+7rO9gcuDwuny312LSqk81j 85J6j903G9g8+rasYvT4vEkugC0q2yYjNTEltUghNS85PyUzL91WyTs43jne1MzAUNfQ0sJc SSEvMTfVVsnFJ0DXLTMH6C4lhbLEnFKgUEBicbGSvp1NUX5pSapCRn5xia1SakFKToFJgV5x Ym5xaV66Xl5qiZWhgYGRKVBhQnbGgzmbGQuO81T0LH/N2sD4i7OLkZNDQsBEonX7cdYuRi4O IYHdjBKfD7xmgnA+MUpMeraQEcL5xihx7uQvVpiWdWf+s0Mk9jJKfFv7EqrlM6PEopV7WECq 2ATUJY48b2UEsUUEjCT2fzoJtoRZ4CajRPOxfUwgCWGBMIn3e+6CFbEIqEqc/nodyObg4BWw lHiyOR1im7zEzEvf2UFsTgEricXX5oBdwSsgKHFy5hOwXcxANc1bZzODzJcQaOWQONRzjgWi 2UXizfQORghbWOLV8S3sELaUxOd3e9kg7HSJH5efMkHYBSC3QdXbS7Se6mcGuYdZQFNi/S59 iLCsxNRT65gg9vJJ9P5+AtXKK7FjHoytJNG+cg6ULSGx91wDlO0hsat9BzRIexklts95wDqB UWEWkn9mIflnFsLqBYzMqxglUwuKc9NTi00LjPJSy+HRnJyfu4kRnFi1vHYwPnzwQe8QIxMH 4yFGCQ5mJRFe8QLTZCHelMTKqtSi/Pii0pzU4kOMpsDwnsgsJZqcD0zteSXxhiaWBiZmZmYm lsZmhkrivItnaCULCaQnlqRmp6YWpBbB9DFxcEo1MM1uSnGWX2FdHit46MX0B5s2Hxfhckz0 +NVy+fq0Ps0bxlvW3GC5OVty2Xs9o4V/d51dFhqZ2/2bqeWo5+1Jc8UN1D+X8LUd53A+tezY zn/Pv7axxJ+0zv52WMd0j8aJg7ryJ3nnBDqe7BIwnrzfyiiMX+X7/L+Ns2dsU9u4Lffo601e ht7z+k66L/4788wu1b3/kvJMOOfM3vav+rP3Sqb8uxzivXeZ/9i+d2fzdOkyiDl8z3PHzCPG y3aqairfdP74RXPVoa1XPjAm1Nw97/A6PVC3+1+XPfe/uNzpXEx9Bt7OlcvKPHsDnjq+zrNN fpF6ICptO+PdKS9mTlk9qW+Noamwv7uVR9rjSX5WdzWUWIozEg21mIuKEwF45/C6NQQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrOLMWRmVeSWpSXmKPExsWy7bCSnO7OHtNkg69r1S2aJvxltlh9t5/N 4uaBnUwWK1cfZbJ413qOxeLo/7dsFpMOXWO02HtL22L+sqfsFt3Xd7A5cHlcPlvqsWlVJ5vH 5iX1HrtvNrB59G1ZxejxeZNcAFsUl01Kak5mWWqRvl0CV8aDOZsZC47zVPQsf83awPiLs4uR k0NCwERi3Zn/7F2MXBxCArsZJd69OcQGkZCQOPVyGSOELSyx8t9zqKKPjBKnbh8BK2ITUJc4 8rwVrEhEwExi6eE1LCBFzAL3GSXeNu9mAUkIC4RI7Li/H8xmEVCVOP31OlADBwevgKXEk83p EAvkJWZe+s4OYnMKWEksvjaHFaRECKhk+00FkDCvgKDEyZlPwKYwA5U3b53NPIFRYBaS1Cwk qQWMTKsYJVMLinPTc4sNCwzzUsv1ihNzi0vz0vWS83M3MYLDXktzB+P2VR/0DjEycTAeYpTg YFYS4RUvME0W4k1JrKxKLcqPLyrNSS0+xCjNwaIkznuh62S8kEB6YklqdmpqQWoRTJaJg1Oq gcmukzFpI9N8NbUFzbp8kmy3Td8xdD/VzXn5Vq1/i27EKp0cp/8WvF7ndHo7Hz2Y9dmcKyfz avr7ujXMhlV+z7S3cc1d2V4ldOGSf+GFh+L8zsLyPrEnP1R3nf8XdU9o9d1m212vSnIDf9Qs 4ym7NrVZhU887/ALo57zVb5tkZlLOA5Ou/e7W7dILeRMsmT+LON305oWLTcw/vri4udn23fl H5jZlHFH8vnklE9fpvQd+PcjL1OssnDfgvVMyaYr3SZpHz8oZMRz9bFKsb24lctEvSfWceoa 2q/nuVzie6Kmxplwf/Ill3NZD3ySP1x5Y7FQNeLsz12Td8eaPFT6oDZzp7RnTKXqkgvHNpr2 KSqxFGckGmoxFxUnAgAmrHG16gIAAA== X-CMS-MailID: 20220929121657epcas5p213b7a187fd77b0783adb4b9389579b44 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220929121657epcas5p213b7a187fd77b0783adb4b9389579b44 References: <20220929120632.64749-1-anuj20.g@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Kanchan Joshi Extend blk_rq_map_user_iov so that it can handle bvec iterator, using the new blk_rq_map_user_bvec function. Signed-off-by: Anuj Gupta Signed-off-by: Kanchan Joshi Suggested-by: Christoph Hellwig --- block/blk-map.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/block/blk-map.c b/block/blk-map.c index 023b63ad06d8..ffab5d2d8d6d 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -623,24 +623,35 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, struct rq_map_data *map_data, const struct iov_iter *iter, gfp_t gfp_mask) { - bool copy = false; + bool copy = false, map_bvec = false; unsigned long align = q->dma_pad_mask | queue_dma_alignment(q); struct bio *bio = NULL; struct iov_iter i; int ret = -EINVAL; - if (!iter_is_iovec(iter)) - goto fail; - if (map_data) copy = true; else if (blk_queue_may_bounce(q)) copy = true; else if (iov_iter_alignment(iter) & align) copy = true; + else if (iov_iter_is_bvec(iter)) + map_bvec = true; + else if (!iter_is_iovec(iter)) + copy = true; else if (queue_virt_boundary(q)) copy = queue_virt_boundary(q) & iov_iter_gap_alignment(iter); + if (map_bvec) { + ret = blk_rq_map_user_bvec(rq, iter); + if (!ret) + return 0; + if (ret != -EREMOTEIO) + goto fail; + /* fall back to copying the data on limits mismatches */ + copy = true; + } + i = *iter; do { if (copy)