forked from Minki/linux
7b35eadd7e
There's an info_size value stored on inet_diag_handler, but for existing code this value is effectively constant, so just use sizeof(struct tcp_info) where required. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* tcp_diag.c Module for monitoring TCP transport protocols sockets.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/inet_diag.h>
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#include <linux/tcp.h>
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#include <net/tcp.h>
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static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
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void *_info)
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{
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const struct tcp_sock *tp = tcp_sk(sk);
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struct tcp_info *info = _info;
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if (sk->sk_state == TCP_LISTEN) {
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r->idiag_rqueue = sk->sk_ack_backlog;
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r->idiag_wqueue = sk->sk_max_ack_backlog;
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} else {
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r->idiag_rqueue = max_t(int, tp->rcv_nxt - tp->copied_seq, 0);
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r->idiag_wqueue = tp->write_seq - tp->snd_una;
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}
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if (info != NULL)
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tcp_get_info(sk, info);
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}
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static const struct inet_diag_handler tcp_diag_handler = {
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.idiag_hashinfo = &tcp_hashinfo,
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.idiag_get_info = tcp_diag_get_info,
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.idiag_type = IPPROTO_TCP,
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};
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static int __init tcp_diag_init(void)
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{
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return inet_diag_register(&tcp_diag_handler);
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}
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static void __exit tcp_diag_exit(void)
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{
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inet_diag_unregister(&tcp_diag_handler);
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}
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module_init(tcp_diag_init);
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module_exit(tcp_diag_exit);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 6);
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