mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-23 11:04:44 +08:00
8086fbaf49
We want to have a tighter control on what ports we bind to in
the BPF_CGROUP_INET{4,6}_CONNECT hooks even if it means
connect() becomes slightly more expensive. The expensive part
comes from the fact that we now need to call inet_csk_get_port()
that verifies that the port is not used and allocates an entry
in the hash table for it.
Since we can't rely on "snum || !bind_address_no_port" to prevent
us from calling POST_BIND hook anymore, let's add another bind flag
to indicate that the call site is BPF program.
v5:
* fix wrong AF_INET (should be AF_INET6) in the bpf program for v6
v3:
* More bpf_bind documentation refinements (Martin KaFai Lau)
* Add UDP tests as well (Martin KaFai Lau)
* Don't start the thread, just do socket+bind+listen (Martin KaFai Lau)
v2:
* Update documentation (Andrey Ignatov)
* Pass BIND_FORCE_ADDRESS_NO_PORT conditionally (Andrey Ignatov)
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrey Ignatov <rdna@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200508174611.228805-5-sdf@google.com
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _INET_COMMON_H
|
|
#define _INET_COMMON_H
|
|
|
|
#include <linux/indirect_call_wrapper.h>
|
|
|
|
extern const struct proto_ops inet_stream_ops;
|
|
extern const struct proto_ops inet_dgram_ops;
|
|
|
|
/*
|
|
* INET4 prototypes used by INET6
|
|
*/
|
|
|
|
struct msghdr;
|
|
struct sock;
|
|
struct sockaddr;
|
|
struct socket;
|
|
|
|
int inet_release(struct socket *sock);
|
|
int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
|
|
int addr_len, int flags);
|
|
int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
|
|
int addr_len, int flags, int is_sendmsg);
|
|
int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr,
|
|
int addr_len, int flags);
|
|
int inet_accept(struct socket *sock, struct socket *newsock, int flags,
|
|
bool kern);
|
|
int inet_send_prepare(struct sock *sk);
|
|
int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size);
|
|
ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
|
|
size_t size, int flags);
|
|
int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
|
|
int flags);
|
|
int inet_shutdown(struct socket *sock, int how);
|
|
int inet_listen(struct socket *sock, int backlog);
|
|
void inet_sock_destruct(struct sock *sk);
|
|
int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
|
|
/* Don't allocate port at this moment, defer to connect. */
|
|
#define BIND_FORCE_ADDRESS_NO_PORT (1 << 0)
|
|
/* Grab and release socket lock. */
|
|
#define BIND_WITH_LOCK (1 << 1)
|
|
/* Called from BPF program. */
|
|
#define BIND_FROM_BPF (1 << 2)
|
|
int __inet_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
|
|
u32 flags);
|
|
int inet_getname(struct socket *sock, struct sockaddr *uaddr,
|
|
int peer);
|
|
int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
|
|
int inet_ctl_sock_create(struct sock **sk, unsigned short family,
|
|
unsigned short type, unsigned char protocol,
|
|
struct net *net);
|
|
int inet_recv_error(struct sock *sk, struct msghdr *msg, int len,
|
|
int *addr_len);
|
|
|
|
struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb);
|
|
int inet_gro_complete(struct sk_buff *skb, int nhoff);
|
|
struct sk_buff *inet_gso_segment(struct sk_buff *skb,
|
|
netdev_features_t features);
|
|
|
|
static inline void inet_ctl_sock_destroy(struct sock *sk)
|
|
{
|
|
if (sk)
|
|
sock_release(sk->sk_socket);
|
|
}
|
|
|
|
#define indirect_call_gro_receive(f2, f1, cb, head, skb) \
|
|
({ \
|
|
unlikely(gro_recursion_inc_test(skb)) ? \
|
|
NAPI_GRO_CB(skb)->flush |= 1, NULL : \
|
|
INDIRECT_CALL_2(cb, f2, f1, head, skb); \
|
|
})
|
|
|
|
#endif
|