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From: Anuj Gupta <[email protected]>
To: [email protected], [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], Kanchan Joshi <[email protected]>
Subject: [PATCH for-next v12 09/12] block: factor out blk_rq_map_bio_alloc helper
Date: Fri, 30 Sep 2022 11:57:46 +0530	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

From: Kanchan Joshi <[email protected]>

Move bio allocation logic from bio_map_user_iov to a new helper
blk_rq_map_bio_alloc. It is named so because functionality is opposite
of what is done inside blk_mq_map_bio_put. This is a prep patch.

Signed-off-by: Kanchan Joshi <[email protected]>
---
 block/blk-map.c | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/block/blk-map.c b/block/blk-map.c
index 84b13a4158b7..d6ea377394a9 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -241,17 +241,10 @@ static void blk_mq_map_bio_put(struct bio *bio)
 	}
 }
 
-static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
-		gfp_t gfp_mask)
+static struct bio *blk_rq_map_bio_alloc(struct request *rq,
+		unsigned int nr_vecs, gfp_t gfp_mask)
 {
-	unsigned int max_sectors = queue_max_hw_sectors(rq->q);
-	unsigned int nr_vecs = iov_iter_npages(iter, BIO_MAX_VECS);
 	struct bio *bio;
-	int ret;
-	int j;
-
-	if (!iov_iter_count(iter))
-		return -EINVAL;
 
 	if (rq->cmd_flags & REQ_POLLED) {
 		blk_opf_t opf = rq->cmd_flags | REQ_ALLOC_CACHE;
@@ -259,13 +252,31 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
 		bio = bio_alloc_bioset(NULL, nr_vecs, opf, gfp_mask,
 					&fs_bio_set);
 		if (!bio)
-			return -ENOMEM;
+			return NULL;
 	} else {
 		bio = bio_kmalloc(nr_vecs, gfp_mask);
 		if (!bio)
-			return -ENOMEM;
+			return NULL;
 		bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs, req_op(rq));
 	}
+	return bio;
+}
+
+static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
+		gfp_t gfp_mask)
+{
+	unsigned int max_sectors = queue_max_hw_sectors(rq->q);
+	unsigned int nr_vecs = iov_iter_npages(iter, BIO_MAX_VECS);
+	struct bio *bio;
+	int ret;
+	int j;
+
+	if (!iov_iter_count(iter))
+		return -EINVAL;
+
+	bio = blk_rq_map_bio_alloc(rq, nr_vecs, gfp_mask);
+	if (bio == NULL)
+		return -ENOMEM;
 
 	while (iov_iter_count(iter)) {
 		struct page **pages, *stack_pages[UIO_FASTIOV];
-- 
2.25.1


  parent reply	other threads:[~2022-09-30  6:45 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     ` [PATCH for-next v12 03/12] block: add blk_rq_map_user_io Anuj Gupta
     [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     ` Anuj Gupta [this message]
     [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

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