net/sock: add an explicit sk argument for ip_cmsg_recv_offset()

So that we can use it even after orphaining the skbuff.

Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/ip.h b/include/net/ip.h
index 55cdaac..f48c67c 100644 (file)
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -579,7 +579,8 @@ int ip_options_rcv_srr(struct sk_buff *skb);
  */
 
 void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb);
-void ip_cmsg_recv_offset(struct msghdr *msg, struct sk_buff *skb, int tlen, int offset);
+void ip_cmsg_recv_offset(struct msghdr *msg, struct sock *sk,
+                        struct sk_buff *skb, int tlen, int offset);
 int ip_cmsg_send(struct sock *sk, struct msghdr *msg,
                 struct ipcm_cookie *ipc, bool allow_ipv6);
 int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
@@ -601,7 +602,7 @@ void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
 
 static inline void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
 {
-       ip_cmsg_recv_offset(msg, skb, 0, 0);
+       ip_cmsg_recv_offset(msg, skb->sk, skb, 0, 0);
 }
 
 bool icmp_global_allow(void);

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index ecbaae2..8b13881 100644 (file)
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -164,10 +164,10 @@ static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb)
        put_cmsg(msg, SOL_IP, IP_ORIGDSTADDR, sizeof(sin), &sin);
 }
 
-void ip_cmsg_recv_offset(struct msghdr *msg, struct sk_buff *skb,
-                        int tlen, int offset)
+void ip_cmsg_recv_offset(struct msghdr *msg, struct sock *sk,
+                        struct sk_buff *skb, int tlen, int offset)
 {
-       struct inet_sock *inet = inet_sk(skb->sk);
+       struct inet_sock *inet = inet_sk(sk);
        unsigned int flags = inet->cmsg_flags;
 
        /* Ordered by supposed usage frequency */

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index a32a890..28a0165 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1421,7 +1421,7 @@ try_again:
                *addr_len = sizeof(*sin);
        }
        if (inet->cmsg_flags)
-               ip_cmsg_recv_offset(msg, skb, sizeof(struct udphdr), off);
+               ip_cmsg_recv_offset(msg, sk, skb, sizeof(struct udphdr), off);
 
        err = copied;
        if (flags & MSG_TRUNC)

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 9103c5c..b5a23ce 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -425,7 +425,7 @@ try_again:
 
        if (is_udp4) {
                if (inet->cmsg_flags)
-                       ip_cmsg_recv_offset(msg, skb,
+                       ip_cmsg_recv_offset(msg, sk, skb,
                                            sizeof(struct udphdr), off);
        } else {
                if (np->rxopt.all)