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Thu, 08 Jan 2026 01:19:56 -0800 (PST) X-Relaying-Domain: purestorage.com Received: from dev-csander.dev.purestorage.com (dev-csander.dev.purestorage.com [10.112.6.120]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id D97BE342258; Thu, 8 Jan 2026 02:19:55 -0700 (MST) Received: by dev-csander.dev.purestorage.com (Postfix, from userid 1557716354) id D4409E42F2C; Thu, 8 Jan 2026 02:19:55 -0700 (MST) From: Caleb Sander Mateos To: Ming Lei , Jens Axboe , Shuah Khan Cc: linux-block@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Stanley Zhang , Uday Shankar , "Martin K . Petersen" , Caleb Sander Mateos Subject: [PATCH v4 06/19] ublk: split out ublk_user_copy() helper Date: Thu, 8 Jan 2026 02:19:34 -0700 Message-ID: <20260108091948.1099139-7-csander@purestorage.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20260108091948.1099139-1-csander@purestorage.com> References: <20260108091948.1099139-1-csander@purestorage.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" ublk_ch_read_iter() and ublk_ch_write_iter() are nearly identical except for the iter direction. Split out a helper function ublk_user_copy() to reduce the code duplication as these functions are about to get larger. Signed-off-by: Caleb Sander Mateos Reviewed-by: Ming Lei --- drivers/block/ublk_drv.c | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 22e82bbf50ce..225372cca404 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -2700,42 +2700,36 @@ static struct request *ublk_check_and_get_req(struc= t kiocb *iocb, fail: ublk_put_req_ref(*io, req); return ERR_PTR(-EACCES); } =20 -static ssize_t ublk_ch_read_iter(struct kiocb *iocb, struct iov_iter *to) +static ssize_t +ublk_user_copy(struct kiocb *iocb, struct iov_iter *iter, int dir) { struct request *req; struct ublk_io *io; size_t buf_off; size_t ret; =20 - req =3D ublk_check_and_get_req(iocb, to, &buf_off, ITER_DEST, &io); + req =3D ublk_check_and_get_req(iocb, iter, &buf_off, dir, &io); if (IS_ERR(req)) return PTR_ERR(req); =20 - ret =3D ublk_copy_user_pages(req, buf_off, to, ITER_DEST); + ret =3D ublk_copy_user_pages(req, buf_off, iter, dir); ublk_put_req_ref(io, req); =20 return ret; } =20 -static ssize_t ublk_ch_write_iter(struct kiocb *iocb, struct iov_iter *fro= m) +static ssize_t ublk_ch_read_iter(struct kiocb *iocb, struct iov_iter *to) { - struct request *req; - struct ublk_io *io; - size_t buf_off; - size_t ret; - - req =3D ublk_check_and_get_req(iocb, from, &buf_off, ITER_SOURCE, &io); - if (IS_ERR(req)) - return PTR_ERR(req); - - ret =3D ublk_copy_user_pages(req, buf_off, from, ITER_SOURCE); - ublk_put_req_ref(io, req); + return ublk_user_copy(iocb, to, ITER_DEST); +} =20 - return ret; +static ssize_t ublk_ch_write_iter(struct kiocb *iocb, struct iov_iter *fro= m) +{ + return ublk_user_copy(iocb, from, ITER_SOURCE); } =20 static const struct file_operations ublk_ch_fops =3D { .owner =3D THIS_MODULE, .open =3D ublk_ch_open, --=20 2.45.2