diff options
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 6cb1676e409a..2516d76f043c 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -253,6 +253,8 @@ struct sock { struct { struct sk_buff *head; struct sk_buff *tail; + int len; + int limit; } sk_backlog; wait_queue_head_t *sk_sleep; struct dst_entry *sk_dst_cache; @@ -589,7 +591,7 @@ static inline int sk_stream_memory_free(struct sock *sk) return sk->sk_wmem_queued < sk->sk_sndbuf; } -/* The per-socket spinlock must be held here. */ +/* OOB backlog add */ static inline void sk_add_backlog(struct sock *sk, struct sk_buff *skb) { if (!sk->sk_backlog.tail) { @@ -601,6 +603,17 @@ static inline void sk_add_backlog(struct sock *sk, struct sk_buff *skb) skb->next = NULL; } +/* The per-socket spinlock must be held here. */ +static inline int sk_add_backlog_limited(struct sock *sk, struct sk_buff *skb) +{ + if (sk->sk_backlog.len >= max(sk->sk_backlog.limit, sk->sk_rcvbuf << 1)) + return -ENOBUFS; + + sk_add_backlog(sk, skb); + sk->sk_backlog.len += skb->truesize; + return 0; +} + static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) { return sk->sk_backlog_rcv(sk, skb); |