netdev - [net-next PATCH 01/10] net: early init support for strparser

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Date:   Tue, 15 Aug 2017 22:30:47 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     davem@...emloft.net, daniel@...earbox.net, ast@...com
Cc:     tgraf@...g.ch, netdev@...r.kernel.org, john.fastabend@...il.com,
        tom@...bertland.com
Subject: [net-next PATCH 01/10] net: early init support for strparser

It is useful to allow strparser to init sockets before the read_sock
callback has been established.

Signed-off-by: John Fastabend <john.fastabend@...il.com>
---
 net/strparser/strparser.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/net/strparser/strparser.c b/net/strparser/strparser.c
index 0d18fbc..434aa66 100644
--- a/net/strparser/strparser.c
+++ b/net/strparser/strparser.c
@@ -373,6 +373,9 @@ static int strp_read_sock(struct strparser *strp)
 	struct socket *sock = strp->sk->sk_socket;
 	read_descriptor_t desc;
 
+	if (unlikely(!sock || !sock->ops || !sock->ops->read_sock))
+		return -EBUSY;
+
 	desc.arg.data = strp;
 	desc.error = 0;
 	desc.count = 1; /* give more than one skb per call */
@@ -486,12 +489,7 @@ int strp_init(struct strparser *strp, struct sock *sk,
 	 * The upper layer calls strp_process for each skb to be parsed.
 	 */
 
-	if (sk) {
-		struct socket *sock = sk->sk_socket;
-
-		if (!sock->ops->read_sock || !sock->ops->peek_len)
-			return -EAFNOSUPPORT;
-	} else {
+	if (!sk) {
 		if (!cb->lock || !cb->unlock)
 			return -EINVAL;
 	}