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mptcp: add eat_recv_skb helper

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This patch extracts the free skb related code in __mptcp_recvmsg_mskq()
into a new helper mptcp_eat_recv_skb().

This new helper will be used in the next patch.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260130-net-next-mptcp-splice-v2-1-31332ba70d7f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Geliang Tang 2026-01-30 20:24:24 +01:00 committed by Jakub Kicinski
parent 74ad1dfe23
commit 436510df0c
1 changed files with 12 additions and 7 deletions
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19
net/mptcp/protocol.c
View File

@ -1995,6 +1995,17 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
static void mptcp_rcv_space_adjust(struct mptcp_sock *msk, int copied);
static void mptcp_eat_recv_skb(struct sock *sk, struct sk_buff *skb)
{
/* avoid the indirect call, we know the destructor is sock_rfree */
skb->destructor = NULL;
skb->sk = NULL;
atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
sk_mem_uncharge(sk, skb->truesize);
__skb_unlink(skb, &sk->sk_receive_queue);
skb_attempt_defer_free(skb);
}
static int __mptcp_recvmsg_mskq(struct sock *sk, struct msghdr *msg,
size_t len, int flags, int copied_total,
struct scm_timestamping_internal *tss,
@ -2049,13 +2060,7 @@ static int __mptcp_recvmsg_mskq(struct sock *sk, struct msghdr *msg,
break;
}
/* avoid the indirect call, we know the destructor is sock_rfree */
skb->destructor = NULL;
skb->sk = NULL;
atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
sk_mem_uncharge(sk, skb->truesize);
__skb_unlink(skb, &sk->sk_receive_queue);
skb_attempt_defer_free(skb);
mptcp_eat_recv_skb(sk, skb);
}
if (copied >= len)