[DECNET]: add memory buffer settings

The patch (originally from Steve) simply adds memory buffer settings to 
DECnet similar to those in TCP.

Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 33 insertions, 0 deletions

diff --git a/net/decnet/sysctl_net_decnet.c b/net/decnet/sysctl_net_decnet.c
index 02bca49cb50..0e9d2c57116 100644
--- a/net/decnet/sysctl_net_decnet.c
+++ b/net/decnet/sysctl_net_decnet.c
@@ -10,6 +10,7 @@
  *
  * Changes:
  * Steve Whitehouse - C99 changes and default device handling
+ * Steve Whitehouse - Memory buffer settings, like the tcp ones
  *
  */
 #include <linux/config.h>
@@ -37,6 +38,11 @@ int decnet_dr_count = 3;
 int decnet_log_martians = 1;
 int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;
 
+/* Reasonable defaults, I hope, based on tcp's defaults */
+int sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
+int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
+int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
+
 #ifdef CONFIG_SYSCTL
 extern int decnet_dst_gc_interval;
 static int min_decnet_time_wait[] = { 5 };
@@ -428,6 +434,33 @@ static ctl_table dn_table[] = {
                 .extra1 = &min_decnet_no_fc_max_cwnd,
                 .extra2 = &max_decnet_no_fc_max_cwnd
         },
+       {
+                .ctl_name = NET_DECNET_MEM,
+                .procname = "decnet_mem",
+                .data = &sysctl_decnet_mem,
+                .maxlen = sizeof(sysctl_decnet_mem),
+                .mode = 0644,
+                .proc_handler = &proc_dointvec,
+                .strategy = &sysctl_intvec,
+        },
+        {
+                .ctl_name = NET_DECNET_RMEM,
+                .procname = "decnet_rmem",
+                .data = &sysctl_decnet_rmem,
+                .maxlen = sizeof(sysctl_decnet_rmem),
+                .mode = 0644,
+                .proc_handler = &proc_dointvec,
+                .strategy = &sysctl_intvec,
+        },
+        {
+                .ctl_name = NET_DECNET_WMEM,
+                .procname = "decnet_wmem",
+                .data = &sysctl_decnet_wmem,
+                .maxlen = sizeof(sysctl_decnet_wmem),
+                .mode = 0644,
+                .proc_handler = &proc_dointvec,
+                .strategy = &sysctl_intvec,
+        },
         {
                 .ctl_name = NET_DECNET_DEBUG_LEVEL,
                 .procname = "debug",