In article <[EMAIL PROTECTED]> (at Wed, 11 Oct 2006 17:51:24 -0700), Ben
Woodard <[EMAIL PROTECTED]> says:
> diff -ru linux-2.6.18/net/ipv4/sysctl_net_ipv4.c
> linux-2.6.18.new/net/ipv4/sysctl_net_ipv4.c
> --- linux-2.6.18/net/ipv4/sysctl_net_ipv4.c 2006-09-19 20:42:06.000000000
> -0700
> +++ linux-2.6.18.new/net/ipv4/sysctl_net_ipv4.c 2006-10-11
> 16:00:37.000000000 -0700
> @@ -128,6 +128,8 @@
> return ret;
> }
>
> +static unsigned long tcp_rto_min=0;
> +static unsigned long tcp_rto_max=65535;
>
> ctl_table ipv4_table[] = {
> {
> @@ -697,6 +699,26 @@
> .mode = 0644,
> .proc_handler = &proc_dointvec
> },
> + {
> + .ctl_name = NET_TCP_RTO_MAX,
> + .procname = "tcp_rto_max",
> + .data = &sysctl_tcp_rto_max,
> + .maxlen = sizeof(unsigned),
sizeof(unsigned long)
> + .mode = 0644,
> + .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
> + .extra1 = &tcp_rto_min_constant,
> + .extra2 = &tcp_rto_max_constant,
> + },
> + {
> + .ctl_name = NET_TCP_RTO_INIT,
> + .procname = "tcp_rto_init",
> + .data = &sysctl_tcp_rto_init,
> + .maxlen = sizeof(unsigned),
sizeof(unsigned long)
> + .mode = 0644,
> + .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
> + .extra1 = &tcp_rto_min_constant,
> + .extra2 = &tcp_rto_max_constant,
> + },
> { .ctl_name = 0 }
> };
>
> diff -ru linux-2.6.18/net/ipv4/tcp.c linux-2.6.18.new/net/ipv4/tcp.c
> --- linux-2.6.18/net/ipv4/tcp.c 2006-09-19 20:42:06.000000000 -0700
> +++ linux-2.6.18.new/net/ipv4/tcp.c 2006-10-11 16:00:37.000000000 -0700
> @@ -1764,6 +1764,8 @@
> return err;
> }
>
> +#define TCP_BACKOFF_MAXVAL 65535
> +
> /*
> * Socket option code for TCP.
> */
> @@ -1939,6 +1941,20 @@
> }
> break;
>
> + case TCP_BACKOFF_MAX:
> + if (val < 1 || val > TCP_BACKOFF_MAXVAL)
> + err = -EINVAL;
> + else
> + tp->rto_max = val;
> + break;
> +
> + case TCP_BACKOFF_INIT:
> + if (val < 1 || val > TCP_BACKOFF_MAXVAL)
> + err = -EINVAL;
> + else
> + tp->rto_init = val;
> + break;
> +
> default:
> err = -ENOPROTOOPT;
> break;
> @@ -2110,6 +2126,12 @@
> if (copy_to_user(optval, icsk->icsk_ca_ops->name, len))
> return -EFAULT;
> return 0;
> + case TCP_BACKOFF_MAX:
> + val = jiffies_to_msecs(tcp_rto_max(tp));
> + break;
tp->rto_max
> + case TCP_BACKOFF_INIT:
> + val = jiffies_to_msecs(tcp_rto_init(tp));
> + break;
> default:
tp->rto_init
--yoshfuji
-
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