diff options
Diffstat (limited to 'net/ipv4/tcp.c')
| -rw-r--r-- | net/ipv4/tcp.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 53bcc17c91e4..fce5668a6a3d 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1849,7 +1849,6 @@ static int receive_fallback_to_copy(struct sock *sk, { unsigned long copy_address = (unsigned long)zc->copybuf_address; struct msghdr msg = {}; - struct iovec iov; int err; zc->length = 0; @@ -1858,8 +1857,8 @@ static int receive_fallback_to_copy(struct sock *sk, if (copy_address != zc->copybuf_address) return -EINVAL; - err = import_single_range(ITER_DEST, (void __user *)copy_address, - inq, &iov, &msg.msg_iter); + err = import_ubuf(ITER_DEST, (void __user *)copy_address, inq, + &msg.msg_iter); if (err) return err; @@ -1886,14 +1885,13 @@ static int tcp_copy_straggler_data(struct tcp_zerocopy_receive *zc, { unsigned long copy_address = (unsigned long)zc->copybuf_address; struct msghdr msg = {}; - struct iovec iov; int err; if (copy_address != zc->copybuf_address) return -EINVAL; - err = import_single_range(ITER_DEST, (void __user *)copy_address, - copylen, &iov, &msg.msg_iter); + err = import_ubuf(ITER_DEST, (void __user *)copy_address, copylen, + &msg.msg_iter); if (err) return err; err = skb_copy_datagram_msg(skb, *offset, &msg, copylen); @@ -3368,9 +3366,25 @@ int tcp_set_window_clamp(struct sock *sk, int val) return -EINVAL; tp->window_clamp = 0; } else { - tp->window_clamp = val < SOCK_MIN_RCVBUF / 2 ? - SOCK_MIN_RCVBUF / 2 : val; - tp->rcv_ssthresh = min(tp->rcv_wnd, tp->window_clamp); + u32 new_rcv_ssthresh, old_window_clamp = tp->window_clamp; + u32 new_window_clamp = val < SOCK_MIN_RCVBUF / 2 ? + SOCK_MIN_RCVBUF / 2 : val; + + if (new_window_clamp == old_window_clamp) + return 0; + + tp->window_clamp = new_window_clamp; + if (new_window_clamp < old_window_clamp) { + /* need to apply the reserved mem provisioning only + * when shrinking the window clamp + */ + __tcp_adjust_rcv_ssthresh(sk, tp->window_clamp); + + } else { + new_rcv_ssthresh = min(tp->rcv_wnd, tp->window_clamp); + tp->rcv_ssthresh = max(new_rcv_ssthresh, + tp->rcv_ssthresh); + } } return 0; } @@ -3594,6 +3608,10 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname, break; case TCP_AO_REPAIR: + if (!tcp_can_repair_sock(sk)) { + err = -EPERM; + break; + } err = tcp_ao_set_repair(sk, optval, optlen); break; #ifdef CONFIG_TCP_AO @@ -4293,6 +4311,8 @@ zerocopy_rcv_out: } #endif case TCP_AO_REPAIR: + if (!tcp_can_repair_sock(sk)) + return -EPERM; return tcp_ao_get_repair(sk, optval, optlen); case TCP_AO_GET_KEYS: case TCP_AO_INFO: { |