From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
netdev@vger.kernel.org
Subject: [RFC][PATCH 12/13] new helper: iov_iter_kvec()
Date: Thu, 4 Dec 2014 20:23:16 +0000 [thread overview]
Message-ID: <1417724597-17099-12-git-send-email-viro@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20141204202011.GO29748@ZenIV.linux.org.uk>
From: Al Viro <viro@zeniv.linux.org.uk>
initialization of kvec-backed iov_iter
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
include/linux/uio.h | 2 ++
mm/iov_iter.c | 13 +++++++++++++
2 files changed, 15 insertions(+)
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 28ed2d9..c567655 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -87,6 +87,8 @@ size_t iov_iter_zero(size_t bytes, struct iov_iter *);
unsigned long iov_iter_alignment(const struct iov_iter *i);
void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov,
unsigned long nr_segs, size_t count);
+void iov_iter_kvec(struct iov_iter *i, int direction, const struct kvec *iov,
+ unsigned long nr_segs, size_t count);
ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
size_t maxsize, unsigned maxpages, size_t *start);
ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages,
diff --git a/mm/iov_iter.c b/mm/iov_iter.c
index 5a3b4a8..7c04051 100644
--- a/mm/iov_iter.c
+++ b/mm/iov_iter.c
@@ -479,6 +479,19 @@ size_t iov_iter_single_seg_count(const struct iov_iter *i)
}
EXPORT_SYMBOL(iov_iter_single_seg_count);
+void iov_iter_kvec(struct iov_iter *i, int direction,
+ const struct kvec *iov, unsigned long nr_segs,
+ size_t count)
+{
+ BUG_ON(!(direction & ITER_KVEC));
+ i->type = direction;
+ i->kvec = (struct kvec *)iov;
+ i->nr_segs = nr_segs;
+ i->iov_offset = 0;
+ i->count = count;
+}
+EXPORT_SYMBOL(iov_iter_kvec);
+
unsigned long iov_iter_alignment(const struct iov_iter *i)
{
unsigned long res = 0;
--
2.1.3
next prev parent reply other threads:[~2014-12-04 20:26 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-04 20:20 [RFC][PATCHES] iov_iter.c rewrite Al Viro
2014-12-04 20:23 ` [RFC][PATCH 01/13] iov_iter.c: macros for iterating over iov_iter Al Viro
2014-12-04 20:23 ` [RFC][PATCH 02/13] iov_iter.c: iterate_and_advance Al Viro
2014-12-04 20:23 ` [RFC][PATCH 03/13] iov_iter.c: convert iov_iter_npages() to iterate_all_kinds Al Viro
2014-12-04 20:23 ` [RFC][PATCH 04/13] iov_iter.c: convert iov_iter_get_pages() " Al Viro
2014-12-04 20:23 ` [RFC][PATCH 05/13] iov_iter.c: convert iov_iter_get_pages_alloc() " Al Viro
2014-12-04 20:23 ` [RFC][PATCH 06/13] iov_iter.c: convert iov_iter_zero() to iterate_and_advance Al Viro
2014-12-04 20:23 ` [RFC][PATCH 07/13] iov_iter.c: get rid of bvec_copy_page_{to,from}_iter() Al Viro
2014-12-05 12:28 ` Sergei Shtylyov
2014-12-04 20:23 ` [RFC][PATCH 08/13] iov_iter.c: convert copy_from_iter() to iterate_and_advance Al Viro
2014-12-04 20:23 ` [RFC][PATCH 09/13] iov_iter.c: convert copy_to_iter() " Al Viro
2014-12-04 20:23 ` [RFC][PATCH 10/13] iov_iter.c: handle ITER_KVEC directly Al Viro
2014-12-04 20:23 ` [RFC][PATCH 11/13] csum_and_copy_..._iter() Al Viro
2014-12-04 20:23 ` Al Viro [this message]
2014-12-04 20:23 ` [RFC][PATCH 13/13] copy_from_iter_nocache() Al Viro
2014-12-08 16:46 ` [RFC][PATCHES] iov_iter.c rewrite Kirill A. Shutemov
2014-12-08 17:58 ` Al Viro
2014-12-08 18:08 ` Al Viro
2014-12-08 18:14 ` Linus Torvalds
2014-12-08 18:20 ` Al Viro
2014-12-08 18:37 ` Linus Torvalds
2014-12-08 18:46 ` Al Viro
2014-12-08 18:57 ` Linus Torvalds
2014-12-08 19:28 ` Al Viro
2014-12-08 19:48 ` Linus Torvalds
2014-12-09 1:56 ` Al Viro
2014-12-09 2:21 ` Kirill A. Shutemov
2015-04-01 2:33 ` [RFC] iov_iter_get_pages() semantics Al Viro
2015-04-01 16:45 ` Linus Torvalds
2015-04-01 18:08 ` Al Viro
2015-04-01 18:15 ` Linus Torvalds
2015-04-01 19:23 ` Al Viro
2015-04-01 18:26 ` Linus Torvalds
2015-04-01 18:34 ` Linus Torvalds
2015-04-01 20:15 ` Al Viro
2015-04-01 21:57 ` Linus Torvalds
2015-04-01 19:50 ` Al Viro
2014-12-08 18:56 ` [RFC][PATCHES] iov_iter.c rewrite Kirill A. Shutemov
2014-12-08 19:01 ` Linus Torvalds
2014-12-08 19:15 ` Dave Jones
2014-12-08 19:23 ` Kirill A. Shutemov
2014-12-08 22:14 ` Theodore Ts'o
2014-12-08 22:23 ` Linus Torvalds
2014-12-08 22:31 ` Dave Jones
2014-12-08 18:07 ` Linus Torvalds
2014-12-08 18:14 ` Al Viro
2014-12-08 18:23 ` Linus Torvalds
2014-12-08 18:35 ` Al Viro
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