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Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c64
1 files changed, 39 insertions, 25 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index fe9da4fb96bf..575e19dcc017 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -145,7 +145,9 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
struct flowi4 *fl4;
struct rtable *rt;
int err;
+ u32 seq;
struct ip_options_rcu *inet_opt;
+ struct inet_timewait_death_row *tcp_death_row = &sock_net(sk)->ipv4.tcp_death_row;
if (addr_len < sizeof(struct sockaddr_in))
return -EINVAL;
@@ -196,7 +198,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
tp->write_seq = 0;
}
- if (tcp_death_row.sysctl_tw_recycle &&
+ if (tcp_death_row->sysctl_tw_recycle &&
!tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr)
tcp_fetch_timewait_stamp(sk, &rt->dst);
@@ -215,7 +217,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
* complete initialization after this.
*/
tcp_set_state(sk, TCP_SYN_SENT);
- err = inet_hash_connect(&tcp_death_row, sk);
+ err = inet_hash_connect(tcp_death_row, sk);
if (err)
goto failure;
@@ -231,19 +233,27 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
/* OK, now commit destination to socket. */
sk->sk_gso_type = SKB_GSO_TCPV4;
sk_setup_caps(sk, &rt->dst);
+ rt = NULL;
- if (!tp->write_seq && likely(!tp->repair))
- tp->write_seq = secure_tcp_sequence_number(inet->inet_saddr,
- inet->inet_daddr,
- inet->inet_sport,
- usin->sin_port,
- &tp->tsoffset);
+ if (likely(!tp->repair)) {
+ seq = secure_tcp_sequence_number(inet->inet_saddr,
+ inet->inet_daddr,
+ inet->inet_sport,
+ usin->sin_port,
+ &tp->tsoffset);
+ if (!tp->write_seq)
+ tp->write_seq = seq;
+ }
inet->inet_id = tp->write_seq ^ jiffies;
+ if (tcp_fastopen_defer_connect(sk, &err))
+ return err;
+ if (err)
+ goto failure;
+
err = tcp_connect(sk);
- rt = NULL;
if (err)
goto failure;
@@ -269,10 +279,13 @@ EXPORT_SYMBOL(tcp_v4_connect);
*/
void tcp_v4_mtu_reduced(struct sock *sk)
{
- struct dst_entry *dst;
struct inet_sock *inet = inet_sk(sk);
- u32 mtu = tcp_sk(sk)->mtu_info;
+ struct dst_entry *dst;
+ u32 mtu;
+ if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))
+ return;
+ mtu = tcp_sk(sk)->mtu_info;
dst = inet_csk_update_pmtu(sk, mtu);
if (!dst)
return;
@@ -418,7 +431,8 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
switch (type) {
case ICMP_REDIRECT:
- do_redirect(icmp_skb, sk);
+ if (!sock_owned_by_user(sk))
+ do_redirect(icmp_skb, sk);
goto out;
case ICMP_SOURCE_QUENCH:
/* Just silently ignore these. */
@@ -1318,10 +1332,7 @@ struct sock *tcp_v4_syn_recv_sock(const struct sock *sk, struct sk_buff *skb,
tcp_ca_openreq_child(newsk, dst);
tcp_sync_mss(newsk, dst_mtu(dst));
- newtp->advmss = dst_metric_advmss(dst);
- if (tcp_sk(sk)->rx_opt.user_mss &&
- tcp_sk(sk)->rx_opt.user_mss < newtp->advmss)
- newtp->advmss = tcp_sk(sk)->rx_opt.user_mss;
+ newtp->advmss = tcp_mss_clamp(tcp_sk(sk), dst_metric_advmss(dst));
tcp_initialize_rcv_mss(newsk);
@@ -1555,8 +1566,7 @@ bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb)
* It has been noticed pure SACK packets were sometimes dropped
* (if cooked by drivers without copybreak feature).
*/
- if (!skb->data_len)
- skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));
+ skb_condense(skb);
if (unlikely(sk_add_backlog(sk, skb, limit))) {
bh_unlock_sock(sk);
@@ -1816,7 +1826,6 @@ const struct inet_connection_sock_af_ops ipv4_specific = {
.getsockopt = ip_getsockopt,
.addr2sockaddr = inet_csk_addr2sockaddr,
.sockaddr_len = sizeof(struct sockaddr_in),
- .bind_conflict = inet_csk_bind_conflict,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_ip_setsockopt,
.compat_getsockopt = compat_ip_getsockopt,
@@ -1887,9 +1896,7 @@ void tcp_v4_destroy_sock(struct sock *sk)
tcp_free_fastopen_req(tp);
tcp_saved_syn_free(tp);
- local_bh_disable();
sk_sockets_allocated_dec(sk);
- local_bh_enable();
}
EXPORT_SYMBOL(tcp_v4_destroy_sock);
@@ -2228,7 +2235,7 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i)
int state;
if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
- icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
+ icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT ||
icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
timer_active = 1;
timer_expires = icsk->icsk_timeout;
@@ -2375,6 +2382,7 @@ struct proto tcp_prot = {
.shutdown = tcp_shutdown,
.setsockopt = tcp_setsockopt,
.getsockopt = tcp_getsockopt,
+ .keepalive = tcp_set_keepalive,
.recvmsg = tcp_recvmsg,
.sendmsg = tcp_sendmsg,
.sendpage = tcp_sendpage,
@@ -2418,7 +2426,7 @@ static void __net_exit tcp_sk_exit(struct net *net)
static int __net_init tcp_sk_init(struct net *net)
{
- int res, cpu;
+ int res, cpu, cnt;
net->ipv4.tcp_sk = alloc_percpu(struct sock *);
if (!net->ipv4.tcp_sk)
@@ -2457,6 +2465,13 @@ static int __net_init tcp_sk_init(struct net *net)
net->ipv4.sysctl_tcp_notsent_lowat = UINT_MAX;
net->ipv4.sysctl_tcp_tw_reuse = 0;
+ cnt = tcp_hashinfo.ehash_mask + 1;
+ net->ipv4.tcp_death_row.sysctl_tw_recycle = 0;
+ net->ipv4.tcp_death_row.sysctl_max_tw_buckets = (cnt + 1) / 2;
+ net->ipv4.tcp_death_row.hashinfo = &tcp_hashinfo;
+
+ net->ipv4.sysctl_max_syn_backlog = max(128, cnt / 256);
+
return 0;
fail:
tcp_sk_exit(net);
@@ -2466,7 +2481,7 @@ fail:
static void __net_exit tcp_sk_exit_batch(struct list_head *net_exit_list)
{
- inet_twsk_purge(&tcp_hashinfo, &tcp_death_row, AF_INET);
+ inet_twsk_purge(&tcp_hashinfo, AF_INET);
}
static struct pernet_operations __net_initdata tcp_sk_ops = {
@@ -2477,7 +2492,6 @@ static struct pernet_operations __net_initdata tcp_sk_ops = {
void __init tcp_v4_init(void)
{
- inet_hashinfo_init(&tcp_hashinfo);
if (register_pernet_subsys(&tcp_sk_ops))
panic("Failed to create the TCP control socket.\n");
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 01:05:51 +0000