[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>
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index f89e55f..d402e90 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -153,6 +153,7 @@
static DEFINE_RWLOCK(dn_hash_lock);
static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
static struct hlist_head dn_wild_sk;
+static atomic_t decnet_memory_allocated;
static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen, int flags);
static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
@@ -446,10 +447,26 @@
dst_release(xchg(&sk->sk_dst_cache, NULL));
}
+static int dn_memory_pressure;
+
+static void dn_enter_memory_pressure(void)
+{
+ if (!dn_memory_pressure) {
+ dn_memory_pressure = 1;
+ }
+}
+
static struct proto dn_proto = {
- .name = "DECNET",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct dn_sock),
+ .name = "NSP",
+ .owner = THIS_MODULE,
+ .enter_memory_pressure = dn_enter_memory_pressure,
+ .memory_pressure = &dn_memory_pressure,
+ .memory_allocated = &decnet_memory_allocated,
+ .sysctl_mem = sysctl_decnet_mem,
+ .sysctl_wmem = sysctl_decnet_wmem,
+ .sysctl_rmem = sysctl_decnet_rmem,
+ .max_header = DN_MAX_NSP_DATA_HEADER + 64,
+ .obj_size = sizeof(struct dn_sock),
};
static struct sock *dn_alloc_sock(struct socket *sock, gfp_t gfp)
@@ -470,6 +487,8 @@
sk->sk_family = PF_DECnet;
sk->sk_protocol = 0;
sk->sk_allocation = gfp;
+ sk->sk_sndbuf = sysctl_decnet_wmem[1];
+ sk->sk_rcvbuf = sysctl_decnet_rmem[1];
/* Initialization of DECnet Session Control Port */
scp = DN_SK(sk);
diff --git a/net/decnet/sysctl_net_decnet.c b/net/decnet/sysctl_net_decnet.c
index 02bca49..0e9d2c5 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_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 @@
.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",