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skmsg: Extract __tcp_bpf_recvmsg() and tcp_bpf_wait_data()

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Although these two functions are only used by TCP, they are not
specific to TCP at all, both operate on skmsg and ingress_msg,
so fit in net/core/skmsg.c very well.

And we will need them for non-TCP, so rename and move them to
skmsg.c and export them to modules.

Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210331023237.41094-13-xiyou.wangcong@gmail.com
This commit is contained in:
Cong Wang
2021-03-30 19:32:33 -07:00
committed by Alexei Starovoitov
parent d7f571188e
commit 2bc793e327
5 changed files with 106 additions and 102 deletions
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4
include/linux/skmsg.h
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@@ -125,6 +125,10 @@ int sk_msg_zerocopy_from_iter(struct sock *sk, struct iov_iter *from,
struct sk_msg *msg, u32 bytes);
int sk_msg_memcopy_from_iter(struct sock *sk, struct iov_iter *from,
struct sk_msg *msg, u32 bytes);
int sk_msg_wait_data(struct sock *sk, struct sk_psock *psock, int flags,
long timeo, int *err);
int sk_msg_recvmsg(struct sock *sk, struct sk_psock *psock, struct msghdr *msg,
int len, int flags);
static inline void sk_msg_check_to_free(struct sk_msg *msg, u32 i, u32 bytes)
{