[net-next,v2,1/2] net/sock: add an explicit sk argument for ip_cmsg_recv_offset()
diff mbox

Message ID 1b4e5292a0c15494515423245e8eeb7adf2ebcea.1478254512.git.pabeni@redhat.com
State New
Headers show

Commit Message

Paolo Abeni Nov. 4, 2016, 10:28 a.m. UTC
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>
---
@Eric, please add your signed off by when you feel comfortable with the patch
as you basically authored it

 include/net/ip.h       | 5 +++--
 net/ipv4/ip_sockglue.c | 6 +++---
 net/ipv4/udp.c         | 2 +-
 net/ipv6/udp.c         | 2 +-
 4 files changed, 8 insertions(+), 7 deletions(-)

Comments

Eric Dumazet Nov. 4, 2016, 12:36 p.m. UTC | #1
On Fri, 2016-11-04 at 11:28 +0100, Paolo Abeni wrote:
> 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>
> ---
> @Eric, please add your signed off by when you feel comfortable with the patch
> as you basically authored it

> -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;

My final version had :

void ip_cmsg_recv_offset(struct msghdr *msg, const struct sock *sk,
                         struct sk_buff *skb, int tlen, int offset)
{
	unsigned int flags = inet_sk(sk)->cmsg_flags;


(Ie not using "struct inet_sock *inet = ...", and a const pointer for
struct sock)

Other than that minor details :

Signed-off-by: Eric Dumazet <edumazet@google.com>

Thanks !


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Patch
diff mbox

diff --git a/include/net/ip.h b/include/net/ip.h
index 5413883..f25c662 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -578,7 +578,8 @@  int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
  */
 
 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,
@@ -600,7 +601,7 @@  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 b8a2d63..940257f 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -153,10 +153,10 @@  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 195992e..55f2d7c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1420,7 +1420,7 @@  int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
 		*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 a7700bb..cb73533 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -425,7 +425,7 @@  int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
 
 	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)