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Commit 95766fff authored by Hideo Aoki's avatar Hideo Aoki Committed by David S. Miller
Browse files

[UDP]: Add memory accounting. 



Signed-off-by: default avatarTakahiro Yasui <tyasui@redhat.com>
Signed-off-by: default avatarHideo Aoki <haoki@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3ab224be

Documentation/networking/ip-sysctl.txt

+27 −0
Original line number Diff line number Diff line
@@ -446,6 +446,33 @@ tcp_dma_copybreak - INTEGER 
	and CONFIG_NET_DMA is enabled.

	Default: 4096



UDP variables:



udp_mem - vector of 3 INTEGERs: min, pressure, max

	Number of pages allowed for queueing by all UDP sockets.



	min: Below this number of pages UDP is not bothered about its

	memory appetite. When amount of memory allocated by UDP exceeds

	this number, UDP starts to moderate memory usage.



	pressure: This value was introduced to follow format of tcp_mem.



	max: Number of pages allowed for queueing by all UDP sockets.



	Default is calculated at boot time from amount of available memory.



udp_rmem_min - INTEGER

	Minimal size of receive buffer used by UDP sockets in moderation.

	Each UDP socket is able to use the size for receiving data, even if

	total pages of UDP sockets exceed udp_mem pressure. The unit is byte.

	Default: 4096



udp_wmem_min - INTEGER

	Minimal size of send buffer used by UDP sockets in moderation.

	Each UDP socket is able to use the size for sending data, even if

	total pages of UDP sockets exceed udp_mem pressure. The unit is byte.

	Default: 4096



CIPSOv4 Variables:



cipso_cache_enable - BOOLEAN

include/net/udp.h

+9 −0
Original line number Diff line number Diff line
@@ -65,6 +65,13 @@ extern rwlock_t udp_hash_lock; 


extern struct proto udp_prot;



extern atomic_t udp_memory_allocated;



/* sysctl variables for udp */

extern int sysctl_udp_mem[3];

extern int sysctl_udp_rmem_min;

extern int sysctl_udp_wmem_min;



struct sk_buff;



/*
@@ -198,4 +205,6 @@ extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo); 
extern int  udp4_proc_init(void);

extern void udp4_proc_exit(void);

#endif



extern void udp_init(void);

#endif	/* _UDP_H */

net/ipv4/af_inet.c

+5 −0
Original line number Diff line number Diff line
@@ -139,6 +139,8 @@ void inet_sock_destruct(struct sock *sk) 
	__skb_queue_purge(&sk->sk_receive_queue);

	__skb_queue_purge(&sk->sk_error_queue);



	sk_mem_reclaim(sk);



	if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {

		printk("Attempt to release TCP socket in state %d %p\n",

		       sk->sk_state, sk);
@@ -1417,6 +1419,9 @@ static int __init inet_init(void) 
	/* Setup TCP slab cache for open requests. */

	tcp_init();



	/* Setup UDP memory threshold */

	udp_init();



	/* Add UDP-Lite (RFC 3828) */

	udplite4_register();

net/ipv4/proc.c

+2 −1
Original line number Diff line number Diff line
@@ -56,7 +56,8 @@ static int sockstat_seq_show(struct seq_file *seq, void *v) 
		   sock_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),

		   tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),

		   atomic_read(&tcp_memory_allocated));

	seq_printf(seq, "UDP: inuse %d\n", sock_prot_inuse(&udp_prot));

	seq_printf(seq, "UDP: inuse %d mem %d\n", sock_prot_inuse(&udp_prot),

		   atomic_read(&udp_memory_allocated));

	seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse(&udplite_prot));

	seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse(&raw_prot));

	seq_printf(seq,  "FRAG: inuse %d memory %d\n",

net/ipv4/sysctl_net_ipv4.c

+31 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <net/ip.h>

#include <net/route.h>

#include <net/tcp.h>

#include <net/udp.h>

#include <net/cipso_ipv4.h>

#include <net/inet_frag.h>
@@ -812,6 +813,36 @@ static struct ctl_table ipv4_table[] = { 
		.mode		= 0644,

		.proc_handler	= &proc_dointvec,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "udp_mem",

		.data		= &sysctl_udp_mem,

		.maxlen		= sizeof(sysctl_udp_mem),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &zero

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "udp_rmem_min",

		.data		= &sysctl_udp_rmem_min,

		.maxlen		= sizeof(sysctl_udp_rmem_min),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &zero

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "udp_wmem_min",

		.data		= &sysctl_udp_wmem_min,

		.maxlen		= sizeof(sysctl_udp_wmem_min),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &zero

	},

	{ .ctl_name = 0 }

};