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Thu, 29 Sep 2022 21:24:14 +0900 (KST) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPA id 20220929121709epcas5p325553d10a7ada7717c2f51ddb566a3e5~ZU-BsZpoH1999119991epcas5p3-; Thu, 29 Sep 2022 12:17:09 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20220929121709epsmtrp270ba0d78c1d27006505094c47795e360~ZU-BriPFm1811218112epsmtrp2i; Thu, 29 Sep 2022 12:17:09 +0000 (GMT) X-AuditID: b6c32a49-319fb70000016970-48-63358e6eda74 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 4C.43.14392.5CC85336; Thu, 29 Sep 2022 21:17:09 +0900 (KST) Received: from localhost.localdomain (unknown [107.110.206.5]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20220929121707epsmtip127b90fef27a1a68fece6a7d250645b96~ZU-ATJ1Xi3029530295epsmtip1D; Thu, 29 Sep 2022 12:17:07 +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, Anuj Gupta Subject: [PATCH for-next v11 11/13] block: add blk_rq_map_user_io Date: Thu, 29 Sep 2022 17:36:30 +0530 Message-Id: <20220929120632.64749-12-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 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprDJsWRmVeSWpSXmKPExsWy7bCmum5+n2mywUkBi6YJf5ktVt/tZ7O4 eWAnk8XK1UeZLN61nmOxmHToGqPF3lvaFvOXPWW36L6+g82B0+Py2VKPTas62Tw2L6n32H2z gc2jb8sqRo/Pm+QC2KKybTJSE1NSixRS85LzUzLz0m2VvIPjneNNzQwMdQ0tLcyVFPISc1Nt lVx8AnTdMnOALlJSKEvMKQUKBSQWFyvp29kU5ZeWpCpk5BeX2CqlFqTkFJgU6BUn5haX5qXr 5aWWWBkaGBiZAhUmZGdsbf/HWHBZqOLIo4PsDYzt/F2MnBwSAiYSkzZsYe9i5OIQEtjNKPH6 8RFmCOcTo8TMji2MEM43IGdqLxNMy7y9d6Cq9jJKPJm1GqrqM6PEkW3PWECq2ATUJY48b2UE sUUEjCT2fzrJClLELLCJUeLX9WNgo4QFHCX23/wKZrMIqErsXDMLrJlXwEpi98qvrBDr5CVm XvrODmJzAsUXX5vDClEjKHFy5hOwemagmuats8FOkhD4yS5x8g/ISRxAjovE4su8EHOEJV4d 38IOYUtJfH63lw3CTpf4cfkp1GsFEs3H9jFC2PYSraf6mUHGMAtoSqzfpQ8RlpWYemodE8Ra Pone30+gWnkldsyDsZUk2lfOgbIlJPaea4CyPSSm/73KBgmsXkaJw/fnsk9gVJiF5J1ZSN6Z hbB6ASPzKkbJ1ILi3PTUYtMCw7zUcng0J+fnbmIEJ1Mtzx2Mdx980DvEyMTBeIhRgoNZSYRX vMA0WYg3JbGyKrUoP76oNCe1+BCjKTC8JzJLiSbnA9N5Xkm8oYmlgYmZmZmJpbGZoZI47+IZ WslCAumJJanZqakFqUUwfUwcnFINTPMPf0n8v7NKUqCpKpj/TKMQ99GEdYLL2kQ6FPM5vLSe +3/ZouX/dLtA699YicXbenwvi4vq3uqbuq1B5X6C7mbrK3tVag4r3HW60pl6ZKPwL3fluTu7 f+xcKnnvpAh/sGxQxmmJ/1ltrd5pjEL1c424Nqq05x+72/TqSnPgpHW1nTN3fPB2zv/v0/aP cWPiNkV+jdsJ96v9jA8HL2djYjYKtn8sJv3uT/7e00yFS5KmPA334no6Zz67DU9nt8W5KzPm 7/UI/dh58ZiUNl/Jsi2pjecuJt3f6mGXFjTl9+K2rFV6wvOOHV+23Cf6yYad049F5bMWTP9s tcL/o5IIT9+yT8VPeESrAxq/RunKK7EUZyQaajEXFScCACCqGRovBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrMLMWRmVeSWpSXmKPExsWy7bCSnO7RHtNkg6ezeSyaJvxltlh9t5/N 4uaBnUwWK1cfZbJ413qOxWLSoWuMFntvaVvMX/aU3aL7+g42B06Py2dLPTat6mTz2Lyk3mP3 zQY2j74tqxg9Pm+SC2CL4rJJSc3JLEst0rdL4MrY2v6PseCyUMWRRwfZGxjb+bsYOTkkBEwk 5u29w9zFyMUhJLCbUWLjyflsEAkJiVMvlzFC2MISK/89Z4co+sgoMWXSabAiNgF1iSPPW8GK RATMJJYeXsMCUsQssINRYt2zxWAJYQFHif03vzKB2CwCqhI718xiAbF5Bawkdq/8ygqxQV5i 5qXv7CA2J1B88bU5QHEOoG2WEttvKkCUC0qcnPkErJUZqLx562zmCYwCs5CkZiFJLWBkWsUo mVpQnJueW2xYYJiXWq5XnJhbXJqXrpecn7uJERzuWpo7GLev+qB3iJGJg/EQowQHs5IIr3iB abIQb0piZVVqUX58UWlOavEhRmkOFiVx3gtdJ+OFBNITS1KzU1MLUotgskwcnFINTJbtF889 Uj91Q1OaZyXbHZG/C+95Hti6J7PwSsvx5LS9rb4iDhuNneL4QiYbtx+r2tF3+rHJwpSQVLZv TP0m4d3La55qq2/e56qWGqrz9sfJnpKVnbaZx6/JHAq4+9TR0SPL/L3u9rLsb+Z3DmyZYr/C j2PXkt9r+t8Lr+zftdfWz1tJqdzTN+M+27+vf/IFNO8dTU6NUN6Y9OyG8erKled0K3bPEjQz ClQ7cudZkn5f1eN698tTqm9Jh733/6xT/3Dr+2fC7vyx7j2iL7Oe1emZtU/k4nnoeVj/kO3a UL/8N/w5jfM37Poq0D0//vnNn4L2v8/FTJTLcPhUwPJPjIE7d8Xjl5mHvWdcWrSpQImlOCPR UIu5qDgRACr5wZ/mAgAA X-CMS-MailID: 20220929121709epcas5p325553d10a7ada7717c2f51ddb566a3e5 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220929121709epcas5p325553d10a7ada7717c2f51ddb566a3e5 References: <20220929120632.64749-1-anuj20.g@samsung.com> Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Create a helper blk_rq_map_user_io for mapping of vectored as well as non-vectored requests. This will help in saving dupilcation of code at few places in scsi and nvme. Signed-off-by: Anuj Gupta Suggested-by: Christoph Hellwig --- block/blk-map.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/blk-mq.h | 2 ++ 2 files changed, 38 insertions(+) diff --git a/block/blk-map.c b/block/blk-map.c index ffab5d2d8d6d..74ee496c2d3a 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -689,6 +689,42 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq, } EXPORT_SYMBOL(blk_rq_map_user); +int blk_rq_map_user_io(struct request *req, struct rq_map_data *map_data, + void __user *ubuf, unsigned long buf_len, gfp_t gfp_mask, + bool vec, int iov_count, bool check_iter_count, int rw) +{ + int ret; + + if (vec) { + struct iovec fast_iov[UIO_FASTIOV]; + struct iovec *iov = fast_iov; + struct iov_iter iter; + + ret = import_iovec(rw, ubuf, iov_count ? iov_count : buf_len, + UIO_FASTIOV, &iov, &iter); + if (ret < 0) + return ret; + + if (iov_count) { + /* SG_IO howto says that the shorter of the two wins */ + iov_iter_truncate(&iter, buf_len); + if (check_iter_count && !iov_iter_count(&iter)) { + kfree(iov); + return -EINVAL; + } + } + + ret = blk_rq_map_user_iov(req->q, req, map_data, &iter, + gfp_mask); + kfree(iov); + } else if (buf_len) { + ret = blk_rq_map_user(req->q, req, map_data, ubuf, buf_len, + gfp_mask); + } + return ret; +} +EXPORT_SYMBOL(blk_rq_map_user_io); + /** * blk_rq_unmap_user - unmap a request with user data * @bio: start of bio list diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 50811d0fb143..ba18e9bdb799 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -985,6 +985,8 @@ struct rq_map_data { int blk_rq_map_user(struct request_queue *, struct request *, struct rq_map_data *, void __user *, unsigned long, gfp_t); +int blk_rq_map_user_io(struct request *, struct rq_map_data *, + void __user *, unsigned long, gfp_t, bool, int, bool, int); int blk_rq_map_user_iov(struct request_queue *, struct request *, struct rq_map_data *, const struct iov_iter *, gfp_t); int blk_rq_unmap_user(struct bio *); -- 2.25.1