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Date: Wed, 11 Jul 2012 10:17:56 +0800
From: Li Yu <raise.sail@...il.com>
To: Linux Netdev List <netdev@...r.kernel.org>
Subject: [RFC][PATCH 3/4] skbtrace: TCP/IP family support
From: Li Yu <bingtian.ly@...bao.com>
This implements skbtrace support for TCP/IP protocol family, but it does
not contains any particular traces.
Basically, it just refactors a bit for XX_get_name(), which will be used
in some socket based traces.
Thanks.
Sign-off-by: Li Yu <bingtian.ly@...bao.com>
---
include/net/inet_common.h | 4 ++++
include/net/ipv6.h | 4 ++++
net/ipv4/af_inet.c | 46
++++++++++++++++++++++++++++++++++-----------
net/ipv6/af_inet6.c | 42 ++++++++++++++++++++++++++++++-----------
net/ipv6/raw.c | 1 +
5 files changed, 75 insertions(+), 22 deletions(-)
diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index 22fac98..74e8bfb 100644
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -29,6 +29,10 @@ extern int inet_shutdown(struct socket *sock, int how);
extern int inet_listen(struct socket *sock, int backlog);
extern void inet_sock_destruct(struct sock *sk);
extern int inet_bind(struct socket *sock, struct sockaddr *uaddr, int
addr_len);
+extern int __inet_sock_getname(struct sock *sk, struct sockaddr *uaddr,
+ int *uaddr_len, int peer);
+extern int __inet_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer);
extern int inet_getname(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer);
extern int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned
long arg);
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index aecf884..2ef2eee 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -603,6 +603,10 @@ extern void ipv6_local_rxpmtu(struct sock *sk,
struct flowi6 *fl6, u32 mtu);
extern int inet6_release(struct socket *sock);
extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
int addr_len);
+extern int __inet6_sock_getname(struct sock *sk, struct sockaddr *uaddr,
+ int *uaddr_len, int peer);
+extern int __inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer);
extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer);
extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 07a02f6..4ddbf8d 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -119,6 +119,7 @@
#include <linux/mroute.h>
#endif
+#include <linux/skbtrace.h>
/* The inetsw table contains everything that inet_create needs to
* build a new socket.
@@ -698,23 +699,14 @@ do_err:
}
EXPORT_SYMBOL(inet_accept);
-
-/*
- * This does both peername and sockname.
- */
-int inet_getname(struct socket *sock, struct sockaddr *uaddr,
+int __inet_sock_getname(struct sock *sk, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
- struct sock *sk = sock->sk;
struct inet_sock *inet = inet_sk(sk);
DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr);
sin->sin_family = AF_INET;
if (peer) {
- if (!inet->inet_dport ||
- (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
- peer == 1))
- return -ENOTCONN;
sin->sin_port = inet->inet_dport;
sin->sin_addr.s_addr = inet->inet_daddr;
} else {
@@ -725,9 +717,38 @@ int inet_getname(struct socket *sock, struct
sockaddr *uaddr,
sin->sin_addr.s_addr = addr;
}
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
- *uaddr_len = sizeof(*sin);
+ if (uaddr_len)
+ *uaddr_len = sizeof(*sin);
return 0;
}
+EXPORT_SYMBOL(__inet_sock_getname);
+
+int __inet_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ return __inet_sock_getname(sock->sk, uaddr, uaddr_len, peer);
+}
+EXPORT_SYMBOL(__inet_getname);
+
+/*
+ * This does both peername and sockname.
+ */
+int inet_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ struct sock *sk = sock->sk;
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (peer) {
+ if (!inet->inet_dport)
+ return -ENOTCONN;
+ if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
+ peer == 1)
+ return -ENOTCONN;
+ }
+
+ return __inet_getname(sock, uaddr, uaddr_len, peer);
+}
EXPORT_SYMBOL(inet_getname);
int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr
*msg,
@@ -914,6 +935,7 @@ const struct proto_ops inet_stream_ops = {
.connect = inet_stream_connect,
.socketpair = sock_no_socketpair,
.accept = inet_accept,
+ .skbtrace_getname = __inet_getname,
.getname = inet_getname,
.poll = tcp_poll,
.ioctl = inet_ioctl,
@@ -942,6 +964,7 @@ const struct proto_ops inet_dgram_ops = {
.connect = inet_dgram_connect,
.socketpair = sock_no_socketpair,
.accept = sock_no_accept,
+ .skbtrace_getname = __inet_getname,
.getname = inet_getname,
.poll = udp_poll,
.ioctl = inet_ioctl,
@@ -973,6 +996,7 @@ static const struct proto_ops inet_sockraw_ops = {
.connect = inet_dgram_connect,
.socketpair = sock_no_socketpair,
.accept = sock_no_accept,
+ .skbtrace_getname = __inet_getname,
.getname = inet_getname,
.poll = datagram_poll,
.ioctl = inet_ioctl,
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index e22e6d8..e384ef1 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -437,15 +437,10 @@ void inet6_destroy_sock(struct sock *sk)
}
EXPORT_SYMBOL_GPL(inet6_destroy_sock);
-/*
- * This does both peername and sockname.
- */
-
-int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+int __inet6_sock_getname(struct sock *sk, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
- struct sock *sk = sock->sk;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
@@ -453,11 +448,6 @@ int inet6_getname(struct socket *sock, struct
sockaddr *uaddr,
sin->sin6_flowinfo = 0;
sin->sin6_scope_id = 0;
if (peer) {
- if (!inet->inet_dport)
- return -ENOTCONN;
- if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
- peer == 1)
- return -ENOTCONN;
sin->sin6_port = inet->inet_dport;
sin->sin6_addr = np->daddr;
if (np->sndflow)
@@ -475,6 +465,34 @@ int inet6_getname(struct socket *sock, struct
sockaddr *uaddr,
*uaddr_len = sizeof(*sin);
return 0;
}
+
+int __inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ return __inet6_sock_getname(sock->sk, uaddr, uaddr_len, peer);
+}
+EXPORT_SYMBOL_GPL(__inet6_getname);
+
+/*
+ * This does both peername and sockname.
+ */
+
+int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ struct sock *sk = sock->sk;
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (peer) {
+ if (!inet->inet_dport)
+ return -ENOTCONN;
+ if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
+ peer == 1)
+ return -ENOTCONN;
+ }
+
+ return __inet6_getname(sock, uaddr, uaddr_len, peer);
+}
EXPORT_SYMBOL(inet6_getname);
int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
@@ -518,6 +536,7 @@ const struct proto_ops inet6_stream_ops = {
.connect = inet_stream_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = inet_accept, /* ok */
+ .skbtrace_getname = __inet6_getname,
.getname = inet6_getname,
.poll = tcp_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
@@ -544,6 +563,7 @@ const struct proto_ops inet6_dgram_ops = {
.connect = inet_dgram_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = sock_no_accept, /* a do nothing */
+ .skbtrace_getname = __inet6_getname,
.getname = inet6_getname,
.poll = udp_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index b5c1dcb..3d0b3b4 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1326,6 +1326,7 @@ static const struct proto_ops inet6_sockraw_ops = {
.connect = inet_dgram_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = sock_no_accept, /* a do nothing */
+ .skbtrace_getname = __inet6_getname,
.getname = inet6_getname,
.poll = datagram_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
--
1.7.9.5
--
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