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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/strparser/strparser.c b/net/strparser/strparser.c
index 0d18fbc..434aa66 100644 (file)
--- 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;
        }