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tcp: export timestamp helpers for mptcp 

MPTCP is builtin, so no need to add EXPORT_SYMBOL()s.

It will be used to support SO_TIMESTAMP(NS) ancillary
messages in the mptcp receive path.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2021-06-03 16:24:31 -07:00 committed by David S. Miller
parent 7a009a70ff
commit 892bfd3ded
2 changed files with 8 additions and 6 deletions
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4
include/net/tcp.h
View File

@ -412,6 +412,10 @@ int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
int flags, int *addr_len);
int tcp_set_rcvlowat(struct sock *sk, int val);
int tcp_set_window_clamp(struct sock *sk, int val);
void tcp_update_recv_tstamps(struct sk_buff *skb,
struct scm_timestamping_internal *tss);
void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
struct scm_timestamping_internal *tss);
void tcp_data_ready(struct sock *sk);
#ifdef CONFIG_MMU
int tcp_mmap(struct file *file, struct socket *sock,

10
net/ipv4/tcp.c
View File

@ -1738,8 +1738,8 @@ int tcp_set_rcvlowat(struct sock *sk, int val)
}
EXPORT_SYMBOL(tcp_set_rcvlowat);
static void tcp_update_recv_tstamps(struct sk_buff *skb,
struct scm_timestamping_internal *tss)
void tcp_update_recv_tstamps(struct sk_buff *skb,
struct scm_timestamping_internal *tss)
{
if (skb->tstamp)
tss->ts[0] = ktime_to_timespec64(skb->tstamp);
@ -2024,8 +2024,6 @@ static int tcp_zerocopy_vm_insert_batch(struct vm_area_struct *vma,
}
#define TCP_VALID_ZC_MSG_FLAGS (TCP_CMSG_TS)
static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
struct scm_timestamping_internal *tss);
static void tcp_zc_finalize_rx_tstamp(struct sock *sk,
struct tcp_zerocopy_receive *zc,
struct scm_timestamping_internal *tss)
@ -2197,8 +2195,8 @@ out:
#endif
/* Similar to __sock_recv_timestamp, but does not require an skb */
static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
struct scm_timestamping_internal *tss)
void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
struct scm_timestamping_internal *tss)
{
int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);
bool has_timestamping = false;