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inet: move inet->defer_connect to inet->inet_flags

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Make room in struct inet_sock by removing this bit field,
using one available bit in inet_flags instead.

Also move local_port_range to fill the resulting hole,
saving 8 bytes on 64bit arches.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-08-16 08:15:45 +00:00 committed by David S. Miller
parent ca571e2eb7
commit 08e39c0dfa
6 changed files with 21 additions and 19 deletions
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10
include/net/inet_sock.h
View file

@ -229,21 +229,18 @@ struct inet_sock {
__u8 min_ttl;
__u8 mc_ttl;
__u8 pmtudisc;
__u8 defer_connect:1; /* Indicates that fastopen_connect is set
* and cookie exists so we defer connect
* until first data frame is written
*/
__u8 rcv_tos;
__u8 convert_csum;
int uc_index;
int mc_index;
__be32 mc_addr;
struct ip_mc_socklist __rcu *mc_list;
struct inet_cork_full cork;
struct {
__u16 lo;
__u16 hi;
} local_port_range;
struct ip_mc_socklist __rcu *mc_list;
struct inet_cork_full cork;
};
#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
@ -270,6 +267,7 @@ enum {
INET_FLAGS_IS_ICSK = 16,
INET_FLAGS_NODEFRAG = 17,
INET_FLAGS_BIND_ADDRESS_NO_PORT = 18,
INET_FLAGS_DEFER_CONNECT = 19,
};
/* cmsg flags for inet */

4
net/ipv4/af_inet.c
View file

@ -656,7 +656,7 @@ int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
err = -EISCONN;
goto out;
case SS_CONNECTING:
if (inet_sk(sk)->defer_connect)
if (inet_test_bit(DEFER_CONNECT, sk))
err = is_sendmsg ? -EINPROGRESS : -EISCONN;
else
err = -EALREADY;
@ -679,7 +679,7 @@ int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
sock->state = SS_CONNECTING;
if (!err && inet_sk(sk)->defer_connect)
if (!err && inet_test_bit(DEFER_CONNECT, sk))
goto out;
/* Just entered SS_CONNECTING state; the only

2
net/ipv4/inet_diag.c
View file

@ -192,7 +192,7 @@ int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
inet_sockopt.nodefrag = inet_test_bit(NODEFRAG, sk);
inet_sockopt.bind_address_no_port = inet_test_bit(BIND_ADDRESS_NO_PORT, sk);
inet_sockopt.recverr_rfc4884 = inet_test_bit(RECVERR_RFC4884, sk);
inet_sockopt.defer_connect = inet->defer_connect;
inet_sockopt.defer_connect = inet_test_bit(DEFER_CONNECT, sk);
if (nla_put(skb, INET_DIAG_SOCKOPT, sizeof(inet_sockopt),
&inet_sockopt))
goto errout;

12
net/ipv4/tcp.c
View file

@ -583,7 +583,8 @@ __poll_t tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
if (urg_data & TCP_URG_VALID)
mask |= EPOLLPRI;
} else if (state == TCP_SYN_SENT && inet_sk(sk)->defer_connect) {
} else if (state == TCP_SYN_SENT &&
inet_test_bit(DEFER_CONNECT, sk)) {
/* Active TCP fastopen socket with defer_connect
* Return EPOLLOUT so application can call write()
* in order for kernel to generate SYN+data
@ -1007,7 +1008,7 @@ int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *copied,
tp->fastopen_req->size = size;
tp->fastopen_req->uarg = uarg;
if (inet->defer_connect) {
if (inet_test_bit(DEFER_CONNECT, sk)) {
err = tcp_connect(sk);
/* Same failure procedure as in tcp_v4/6_connect */
if (err) {
@ -1025,7 +1026,7 @@ int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *copied,
if (tp->fastopen_req) {
*copied = tp->fastopen_req->copied;
tcp_free_fastopen_req(tp);
inet->defer_connect = 0;
inet_clear_bit(DEFER_CONNECT, sk);
}
return err;
}
@ -1066,7 +1067,8 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size)
zc = MSG_SPLICE_PAGES;
}
if (unlikely(flags & MSG_FASTOPEN || inet_sk(sk)->defer_connect) &&
if (unlikely(flags & MSG_FASTOPEN ||
inet_test_bit(DEFER_CONNECT, sk)) &&
!tp->repair) {
err = tcp_sendmsg_fastopen(sk, msg, &copied_syn, size, uarg);
if (err == -EINPROGRESS && copied_syn > 0)
@ -3088,7 +3090,7 @@ int tcp_disconnect(struct sock *sk, int flags)
/* Clean up fastopen related fields */
tcp_free_fastopen_req(tp);
inet->defer_connect = 0;
inet_clear_bit(DEFER_CONNECT, sk);
tp->fastopen_client_fail = 0;
WARN_ON(inet->inet_num && !icsk->icsk_bind_hash);

2
net/ipv4/tcp_fastopen.c
View file

@ -451,7 +451,7 @@ bool tcp_fastopen_defer_connect(struct sock *sk, int *err)
if (tp->fastopen_connect && !tp->fastopen_req) {
if (tcp_fastopen_cookie_check(sk, &mss, &cookie)) {
inet_sk(sk)->defer_connect = 1;
inet_set_bit(DEFER_CONNECT, sk);
return true;
}

10
net/mptcp/protocol.c
View file

@ -1686,7 +1686,7 @@ static int mptcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg,
if (!mptcp_disconnect(sk, 0))
sk->sk_socket->state = SS_UNCONNECTED;
}
inet_sk(sk)->defer_connect = 0;
inet_clear_bit(DEFER_CONNECT, sk);
return ret;
}
@ -1704,7 +1704,8 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
lock_sock(sk);
if (unlikely(inet_sk(sk)->defer_connect || msg->msg_flags & MSG_FASTOPEN)) {
if (unlikely(inet_test_bit(DEFER_CONNECT, sk) ||
msg->msg_flags & MSG_FASTOPEN)) {
int copied_syn = 0;
ret = mptcp_sendmsg_fastopen(sk, msg, len, &copied_syn);
@ -3601,7 +3602,7 @@ static int mptcp_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (err < 0)
goto out;
inet_sk(sk)->defer_connect = inet_sk(ssk)->defer_connect;
inet_assign_bit(DEFER_CONNECT, sk, inet_test_bit(DEFER_CONNECT, ssk));
out:
if (!msk->fastopening)
@ -3827,7 +3828,8 @@ static __poll_t mptcp_poll(struct file *file, struct socket *sock,
mask |= EPOLLOUT | EPOLLWRNORM;
else
mask |= mptcp_check_writeable(msk);
} else if (state == TCP_SYN_SENT && inet_sk(sk)->defer_connect) {
} else if (state == TCP_SYN_SENT &&
inet_test_bit(DEFER_CONNECT, sk)) {
/* cf tcp_poll() note about TFO */
mask |= EPOLLOUT | EPOLLWRNORM;
}