public inbox for [email protected]
 help / color / mirror / Atom feed
From: Anuj Gupta <[email protected]>
To: [email protected], [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], Anuj Gupta <[email protected]>
Subject: [PATCH for-next v12 03/12] block: add blk_rq_map_user_io
Date: Fri, 30 Sep 2022 11:57:40 +0530	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

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 <[email protected]>
Suggested-by: Christoph Hellwig <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
---
 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 7693f8e3c454..0e37bbedd46c 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -611,6 +611,42 @@ 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 = 0;
+
+	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


  parent reply	other threads:[~2022-09-30  6:43 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20220930063754epcas5p2aff33c952032713a39604388eacda910@epcas5p2.samsung.com>
2022-09-30  6:27 ` [PATCH for-next v12 00/12] Fixed-buffer for uring-cmd/passthru Anuj Gupta
     [not found]   ` <CGME20220930063805epcas5p2c8eb80f32507f011baedc6d6b4d3f38d@epcas5p2.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 01/12] io_uring: add io_uring_cmd_import_fixed Anuj Gupta
     [not found]   ` <CGME20220930063809epcas5p328b9e14ead49e9612b905e6f5b6682f7@epcas5p3.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 02/12] io_uring: introduce fixed buffer support for io_uring_cmd Anuj Gupta
2022-09-30 13:42       ` Jens Axboe
2022-09-30 14:04         ` Anuj gupta
     [not found]   ` <CGME20220930063811epcas5p43cce58f5e1589c3e3780ce0cfd563986@epcas5p4.samsung.com>
2022-09-30  6:27     ` Anuj Gupta [this message]
     [not found]   ` <CGME20220930063815epcas5p1e056d6a2a53949296a7657de804fd2ec@epcas5p1.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 04/12] scsi: Use blk_rq_map_user_io helper Anuj Gupta
     [not found]   ` <CGME20220930063818epcas5p4e321f0efa5a53759ea19eb8f1c63deef@epcas5p4.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 05/12] nvme: " Anuj Gupta
     [not found]   ` <CGME20220930063821epcas5p48d4ec5136d487ea779ac74e2c0b740ac@epcas5p4.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 06/12] nvme: refactor nvme_add_user_metadata Anuj Gupta
     [not found]   ` <CGME20220930063824epcas5p4f829f3b8673e2603cdc9a799ca44ea6e@epcas5p4.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 07/12] nvme: refactor nvme_alloc_request Anuj Gupta
     [not found]   ` <CGME20220930063826epcas5p491d9bc62214c1d7c8c24c883299edfb7@epcas5p4.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 08/12] block: rename bio_map_put to blk_mq_map_bio_put Anuj Gupta
     [not found]   ` <CGME20220930063828epcas5p2bfddb254b0dffde77e99c2acc4440bde@epcas5p2.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 09/12] block: factor out blk_rq_map_bio_alloc helper Anuj Gupta
     [not found]   ` <CGME20220930063831epcas5p4b6a8559dedd39ef423a0b9a317163969@epcas5p4.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 10/12] block: extend functionality to map bvec iterator Anuj Gupta
     [not found]   ` <CGME20220930063833epcas5p40fbff95f9d132f5a42dda80d307426e9@epcas5p4.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 11/12] nvme: pass ubuffer as an integer Anuj Gupta
     [not found]   ` <CGME20220930063835epcas5p2812f8e3d0758b19c01198034fcddc019@epcas5p2.samsung.com>
2022-09-30  6:27     ` [PATCH for-next v12 12/12] nvme: wire up fixed buffer support for nvme passthrough Anuj Gupta
2022-09-30 14:04   ` [PATCH for-next v12 00/12] Fixed-buffer for uring-cmd/passthru Jens Axboe

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox