linux-kernel - [PATCH 3.4 14/25] net: update consumers of MSG_MORE to recognize MSG_SENDPAGE

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Message-Id: <20131210075931.838036216@linuxfoundation.org>
Date:	Tue, 10 Dec 2013 00:00:22 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Tom Herbert <therbert@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Shawn Landden <shawn@...rchofgit.com>
Subject: [PATCH 3.4 14/25] net: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLAST

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shawn Landden <shawn@...rchofgit.com>

commit d3f7d56a7a4671d395e8af87071068a195257bf6 upstream.

Commit 35f9c09fe (tcp: tcp_sendpages() should call tcp_push() once)
added an internal flag MSG_SENDPAGE_NOTLAST, similar to
MSG_MORE.

algif_hash, algif_skcipher, and udp used MSG_MORE from tcp_sendpages()
and need to see the new flag as identical to MSG_MORE.

This fixes sendfile() on AF_ALG.

v3: also fix udp

Cc: Tom Herbert <therbert@...gle.com>
Cc: Eric Dumazet <eric.dumazet@...il.com>
Cc: David S. Miller <davem@...emloft.net>
Reported-and-tested-by: Shawn Landden <shawnlandden@...il.com>
Original-patch: Richard Weinberger <richard@....at>
Signed-off-by: Shawn Landden <shawn@...rchofgit.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/algif_hash.c     |    3 +++
 crypto/algif_skcipher.c |    3 +++
 net/ipv4/udp.c          |    3 +++
 3 files changed, 9 insertions(+)

--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -117,6 +117,9 @@ static ssize_t hash_sendpage(struct sock
 	if (flags & MSG_SENDPAGE_NOTLAST)
 		flags |= MSG_MORE;
 
+	if (flags & MSG_SENDPAGE_NOTLAST)
+		flags |= MSG_MORE;
+
 	lock_sock(sk);
 	sg_init_table(ctx->sgl.sg, 1);
 	sg_set_page(ctx->sgl.sg, page, size, offset);
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -381,6 +381,9 @@ static ssize_t skcipher_sendpage(struct
 	if (flags & MSG_SENDPAGE_NOTLAST)
 		flags |= MSG_MORE;
 
+	if (flags & MSG_SENDPAGE_NOTLAST)
+		flags |= MSG_MORE;
+
 	lock_sock(sk);
 	if (!ctx->more && ctx->used)
 		goto unlock;
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1042,6 +1042,9 @@ int udp_sendpage(struct sock *sk, struct
 	if (flags & MSG_SENDPAGE_NOTLAST)
 		flags |= MSG_MORE;
 
+	if (flags & MSG_SENDPAGE_NOTLAST)
+		flags |= MSG_MORE;
+
 	if (!up->pending) {
 		struct msghdr msg = {	.msg_flags = flags|MSG_MORE };
 


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