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inet: move inet->transparent to inet->inet_flags

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IP_TRANSPARENT socket option can now be set/read
without locking the socket.

v2: removed unused issk variable in mptcp_setsockopt_sol_ip_set_transparent()
v4: rebased after commit 3f326a821b ("mptcp: change the mpc check helper to return a sk")

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.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 08:15:41 +00:00 committed by David S. Miller
parent 307b4ac6dc
commit 4bd0623f04
11 changed files with 30 additions and 34 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
include/net/inet_sock.h
View file

@ -231,7 +231,6 @@ struct inet_sock {
__u8 mc_ttl;
__u8 pmtudisc;
__u8 is_icsk:1,
transparent:1,
nodefrag:1;
__u8 bind_address_no_port:1,
defer_connect:1; /* Indicates that fastopen_connect is set
@ -271,6 +270,7 @@ enum {
INET_FLAGS_HDRINCL = 12,
INET_FLAGS_MC_LOOP = 13,
INET_FLAGS_MC_ALL = 14,
INET_FLAGS_TRANSPARENT = 15,
};
/* cmsg flags for inet */
@ -397,7 +397,7 @@ static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
{
__u8 flags = 0;
if (inet_sk(sk)->transparent || inet_test_bit(HDRINCL, sk))
if (inet_test_bit(TRANSPARENT, sk) || inet_test_bit(HDRINCL, sk))
flags |= FLOWI_FLAG_ANYSRC;
return flags;
}
@ -424,7 +424,7 @@ static inline bool inet_can_nonlocal_bind(struct net *net,
{
return READ_ONCE(net->ipv4.sysctl_ip_nonlocal_bind) ||
test_bit(INET_FLAGS_FREEBIND, &inet->inet_flags) ||
inet->transparent;
test_bit(INET_FLAGS_TRANSPARENT, &inet->inet_flags);
}
static inline bool inet_addr_valid_or_nonlocal(struct net *net,

2
include/net/ipv6.h
View file

@ -938,7 +938,7 @@ static inline bool ipv6_can_nonlocal_bind(struct net *net,
{
return net->ipv6.sysctl.ip_nonlocal_bind ||
test_bit(INET_FLAGS_FREEBIND, &inet->inet_flags) ||
inet->transparent;
test_bit(INET_FLAGS_TRANSPARENT, &inet->inet_flags);
}
/* Sysctl settings for net ipv6.auto_flowlabels */

2
include/net/route.h
View file

@ -298,7 +298,7 @@ static inline void ip_route_connect_init(struct flowi4 *fl4, __be32 dst,
{
__u8 flow_flags = 0;
if (inet_sk(sk)->transparent)
if (inet_test_bit(TRANSPARENT, sk))
flow_flags |= FLOWI_FLAG_ANYSRC;
flowi4_init_output(fl4, oif, READ_ONCE(sk->sk_mark), ip_sock_rt_tos(sk),

2
include/net/tcp.h
View file

@ -2031,7 +2031,7 @@ static inline bool inet_sk_transparent(const struct sock *sk)
case TCP_NEW_SYN_RECV:
return inet_rsk(inet_reqsk(sk))->no_srccheck;
}
return inet_sk(sk)->transparent;
return inet_test_bit(TRANSPARENT, sk);
}
/* Determines whether this is a thin stream (which may suffer from

2
net/ipv4/inet_diag.c
View file

@ -187,7 +187,7 @@ int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
inet_sockopt.freebind = inet_test_bit(FREEBIND, sk);
inet_sockopt.hdrincl = inet_test_bit(HDRINCL, sk);
inet_sockopt.mc_loop = inet_test_bit(MC_LOOP, sk);
inet_sockopt.transparent = inet->transparent;
inet_sockopt.transparent = inet_test_bit(TRANSPARENT, sk);
inet_sockopt.mc_all = inet_test_bit(MC_ALL, sk);
inet_sockopt.nodefrag = inet->nodefrag;
inet_sockopt.bind_address_no_port = inet->bind_address_no_port;

2
net/ipv4/inet_timewait_sock.c
View file

@ -203,7 +203,7 @@ struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk,
tw->tw_reuseport = sk->sk_reuseport;
tw->tw_hash = sk->sk_hash;
tw->tw_ipv6only = 0;
tw->tw_transparent = inet->transparent;
tw->tw_transparent = inet_test_bit(TRANSPARENT, sk);
tw->tw_prot = sk->sk_prot_creator;
atomic64_set(&tw->tw_cookie, atomic64_read(&sk->sk_cookie));
twsk_net_set(tw, sock_net(sk));

28
net/ipv4/ip_sockglue.c
View file

@ -1005,7 +1005,16 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
return -EINVAL;
inet_assign_bit(MC_ALL, sk, val);
return 0;
case IP_TRANSPARENT:
if (!!val && !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
err = -EPERM;
break;
}
if (optlen < 1)
goto e_inval;
inet_assign_bit(TRANSPARENT, sk, val);
return 0;
}
err = 0;
@ -1319,17 +1328,6 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
err = xfrm_user_policy(sk, optname, optval, optlen);
break;
case IP_TRANSPARENT:
if (!!val && !sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
!sockopt_ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
err = -EPERM;
break;
}
if (optlen < 1)
goto e_inval;
inet->transparent = !!val;
break;
case IP_MINTTL:
if (optlen < 1)
goto e_inval;
@ -1585,6 +1583,9 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_MULTICAST_ALL:
val = inet_test_bit(MC_ALL, sk);
goto copyval;
case IP_TRANSPARENT:
val = inet_test_bit(TRANSPARENT, sk);
goto copyval;
}
if (needs_rtnl)
@ -1735,9 +1736,6 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
len -= msg.msg_controllen;
return copy_to_sockptr(optlen, &len, sizeof(int));
}
case IP_TRANSPARENT:
val = inet->transparent;
break;
case IP_MINTTL:
val = inet->min_ttl;
break;

2
net/ipv4/tcp_input.c
View file

@ -7000,7 +7000,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
tmp_opt.tstamp_ok = tmp_opt.saw_tstamp;
tcp_openreq_init(req, &tmp_opt, skb, sk);
inet_rsk(req)->no_srccheck = inet_sk(sk)->transparent;
inet_rsk(req)->no_srccheck = inet_test_bit(TRANSPARENT, sk);
/* Note: tcp_v6_init_req() might override ir_iif for link locals */
inet_rsk(req)->ir_iif = inet_request_bound_dev_if(sk, skb);

3
net/ipv4/tcp_minisocks.c
View file

@ -289,9 +289,8 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
if (tw) {
struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
struct inet_sock *inet = inet_sk(sk);
tw->tw_transparent = inet->transparent;
tw->tw_transparent = inet_test_bit(TRANSPARENT, sk);
tw->tw_mark = sk->sk_mark;
tw->tw_priority = sk->sk_priority;
tw->tw_rcv_wscale = tp->rx_opt.rcv_wscale;

4
net/ipv6/ipv6_sockglue.c
View file

@ -633,7 +633,7 @@ int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
if (optlen < sizeof(int))
goto e_inval;
/* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */
inet_sk(sk)->transparent = valbool;
inet_assign_bit(TRANSPARENT, sk, valbool);
retv = 0;
break;
@ -1330,7 +1330,7 @@ int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
}
case IPV6_TRANSPARENT:
val = inet_sk(sk)->transparent;
val = inet_test_bit(TRANSPARENT, sk);
break;
case IPV6_FREEBIND:

11
net/mptcp/sockopt.c
View file

@ -416,7 +416,8 @@ static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname,
sk->sk_ipv6only = ssk->sk_ipv6only;
break;
case IPV6_TRANSPARENT:
inet_sk(sk)->transparent = inet_sk(ssk)->transparent;
inet_assign_bit(TRANSPARENT, sk,
inet_test_bit(TRANSPARENT, ssk));
break;
case IPV6_FREEBIND:
inet_assign_bit(FREEBIND, sk,
@ -685,7 +686,6 @@ static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int o
sockptr_t optval, unsigned int optlen)
{
struct sock *sk = (struct sock *)msk;
struct inet_sock *issk;
struct sock *ssk;
int err;
@ -701,14 +701,13 @@ static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int o
return PTR_ERR(ssk);
}
issk = inet_sk(ssk);
switch (optname) {
case IP_FREEBIND:
inet_assign_bit(FREEBIND, ssk, inet_test_bit(FREEBIND, sk));
break;
case IP_TRANSPARENT:
issk->transparent = inet_sk(sk)->transparent;
inet_assign_bit(TRANSPARENT, ssk,
inet_test_bit(TRANSPARENT, sk));
break;
default:
release_sock(sk);
@ -1441,7 +1440,7 @@ static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk)
__tcp_sock_set_cork(ssk, !!msk->cork);
__tcp_sock_set_nodelay(ssk, !!msk->nodelay);
inet_sk(ssk)->transparent = inet_sk(sk)->transparent;
inet_assign_bit(TRANSPARENT, ssk, inet_test_bit(TRANSPARENT, sk));
inet_assign_bit(FREEBIND, ssk, inet_test_bit(FREEBIND, sk));
}