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Commit 33490170 authored by YOSHIFUJI Hideaki's avatar YOSHIFUJI Hideaki Committed by David S. Miller
Browse files

[IPV4] SNMP: Move some statistic bits to net/ipv4/proc.c. 



This also fixes memory leak in error path.

Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 49ed67a9

include/net/ip.h

+3 −0
Original line number Diff line number Diff line
@@ -166,6 +166,9 @@ DECLARE_SNMP_STAT(struct linux_mib, net_statistics); 
#define NET_ADD_STATS_BH(field, adnd)	SNMP_ADD_STATS_BH(net_statistics, field, adnd)

#define NET_ADD_STATS_USER(field, adnd)	SNMP_ADD_STATS_USER(net_statistics, field, adnd)



extern int snmp_mib_init(void *ptr[2], size_t mibsize, size_t mibalign);

extern void snmp_mib_free(void *ptr[2]);



extern int sysctl_local_port_range[2];

extern int sysctl_ip_default_ttl;

extern int sysctl_ip_nonlocal_bind;

net/ipv4/af_inet.c

+39 −20
Original line number Diff line number Diff line
@@ -1245,28 +1245,47 @@ static struct net_protocol icmp_protocol = { 


static int __init init_ipv4_mibs(void)

{

	net_statistics[0] = alloc_percpu(struct linux_mib);

	net_statistics[1] = alloc_percpu(struct linux_mib);

	ip_statistics[0] = alloc_percpu(struct ipstats_mib);

	ip_statistics[1] = alloc_percpu(struct ipstats_mib);

	icmp_statistics[0] = alloc_percpu(struct icmp_mib);

	icmp_statistics[1] = alloc_percpu(struct icmp_mib);

	tcp_statistics[0] = alloc_percpu(struct tcp_mib);

	tcp_statistics[1] = alloc_percpu(struct tcp_mib);

	udp_statistics[0] = alloc_percpu(struct udp_mib);

	udp_statistics[1] = alloc_percpu(struct udp_mib);

	udplite_statistics[0] = alloc_percpu(struct udp_mib);

	udplite_statistics[1] = alloc_percpu(struct udp_mib);

	if (!

	    (net_statistics[0] && net_statistics[1] && ip_statistics[0]

	     && ip_statistics[1] && tcp_statistics[0] && tcp_statistics[1]

	     && udp_statistics[0] && udp_statistics[1]

	     && udplite_statistics[0] && udplite_statistics[1]             ) )

		return -ENOMEM;



	(void) tcp_mib_init();

	if (snmp_mib_init((void **)net_statistics,

			  sizeof(struct linux_mib),

			  __alignof__(struct linux_mib)) < 0)

		goto err_net_mib;

	if (snmp_mib_init((void **)ip_statistics,

			  sizeof(struct ipstats_mib),

			  __alignof__(struct ipstats_mib)) < 0)

		goto err_ip_mib;

	if (snmp_mib_init((void **)icmp_statistics,

			  sizeof(struct icmp_mib),

			  __alignof__(struct icmp_mib)) < 0)

		goto err_icmp_mib;

	if (snmp_mib_init((void **)tcp_statistics,

			  sizeof(struct tcp_mib),

			  __alignof__(struct tcp_mib)) < 0)

		goto err_tcp_mib;

	if (snmp_mib_init((void **)udp_statistics,

			  sizeof(struct udp_mib),

			  __alignof__(struct udp_mib)) < 0)

		goto err_udp_mib;

	if (snmp_mib_init((void **)udplite_statistics,

			  sizeof(struct udp_mib),

			  __alignof__(struct udp_mib)) < 0)

		goto err_udplite_mib;



	tcp_mib_init();



	return 0;



err_udplite_mib:

	snmp_mib_free((void **)udp_statistics);

err_udp_mib:

	snmp_mib_free((void **)tcp_statistics);

err_tcp_mib:

	snmp_mib_free((void **)icmp_statistics);

err_icmp_mib:

	snmp_mib_free((void **)ip_statistics);

err_ip_mib:

	snmp_mib_free((void **)net_statistics);

err_net_mib:

	return -ENOMEM;

}



static int ipv4_proc_init(void);

net/ipv4/proc.c

+25 −0
Original line number Diff line number Diff line
@@ -391,3 +391,28 @@ int __init ip_misc_proc_init(void) 
	goto out;

}



int snmp_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)

{

	BUG_ON(ptr == NULL);

	ptr[0] = __alloc_percpu(mibsize);

	if (!ptr[0])

		goto err0;

	ptr[1] = __alloc_percpu(mibsize);

	if (!ptr[1])

		goto err1;

	return 0;

err1:

	free_percpu(ptr[0]);

	ptr[0] = NULL;

err0:

	return -ENOMEM;

}



void snmp_mib_free(void *ptr[2])

{

	BUG_ON(ptr == NULL);

	free_percpu(ptr[0]);

	free_percpu(ptr[1]);

	ptr[0] = ptr[1] = NULL;

}