diff options
Diffstat (limited to 'net/ipv4/tcp.c')
| -rw-r--r-- | net/ipv4/tcp.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index e457c7ab2e2..1ca253635f7 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -536,13 +536,14 @@ int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg) { struct tcp_sock *tp = tcp_sk(sk); int answ; + bool slow; switch (cmd) { case SIOCINQ: if (sk->sk_state == TCP_LISTEN) return -EINVAL; - lock_sock(sk); + slow = lock_sock_fast(sk); if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) answ = 0; else if (sock_flag(sk, SOCK_URGINLINE) || @@ -557,7 +558,7 @@ int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg) answ--; } else answ = tp->urg_seq - tp->copied_seq; - release_sock(sk); + unlock_sock_fast(sk, slow); break; case SIOCATMARK: answ = tp->urg_data && tp->urg_seq == tp->copied_seq; @@ -1490,15 +1491,19 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc, copied += used; offset += used; } - /* - * If recv_actor drops the lock (e.g. TCP splice + /* If recv_actor drops the lock (e.g. TCP splice * receive) the skb pointer might be invalid when * getting here: tcp_collapse might have deleted it * while aggregating skbs from the socket queue. */ - skb = tcp_recv_skb(sk, seq-1, &offset); - if (!skb || (offset+1 != skb->len)) + skb = tcp_recv_skb(sk, seq - 1, &offset); + if (!skb) break; + /* TCP coalescing might have appended data to the skb. + * Try to splice more frags + */ + if (offset + 1 != skb->len) + continue; } if (tcp_hdr(skb)->fin) { sk_eat_skb(sk, skb, false); @@ -2300,7 +2305,7 @@ void tcp_sock_destruct(struct sock *sk) static inline bool tcp_can_repair_sock(const struct sock *sk) { - return capable(CAP_NET_ADMIN) && + return ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN) && ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_ESTABLISHED)); } @@ -3586,8 +3591,7 @@ void __init tcp_init(void) alloc_large_system_hash("TCP established", sizeof(struct inet_ehash_bucket), thash_entries, - (totalram_pages >= 128 * 1024) ? - 13 : 15, + 17, /* one slot per 128 KB of memory */ 0, NULL, &tcp_hashinfo.ehash_mask, @@ -3603,8 +3607,7 @@ void __init tcp_init(void) alloc_large_system_hash("TCP bind", sizeof(struct inet_bind_hashbucket), tcp_hashinfo.ehash_mask + 1, - (totalram_pages >= 128 * 1024) ? - 13 : 15, + 17, /* one slot per 128 KB of memory */ 0, &tcp_hashinfo.bhash_size, NULL, |