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Commit c4c6bc31 authored by Raghavendra K T's avatar Raghavendra K T Committed by David S. Miller
Browse files

net: Introduce helper functions to get the per cpu data 



Signed-off-by: default avatarRaghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 06fb4e70

include/net/ip.h

+10 −0
Original line number Diff line number Diff line
@@ -202,10 +202,20 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb, 
#define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd)

#define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd)



u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offct);

unsigned long snmp_fold_field(void __percpu *mib, int offt);

#if BITS_PER_LONG==32

u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,

			 size_t syncp_offset);

u64 snmp_fold_field64(void __percpu *mib, int offt, size_t sync_off);

#else

static inline u64  snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,

					size_t syncp_offset)

{

	return snmp_get_cpu_field(mib, cpu, offct);



}



static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off)

{

	return snmp_fold_field(mib, offt);

net/ipv4/af_inet.c

+27 −14
Original line number Diff line number Diff line
@@ -1452,25 +1452,28 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family, 
}

EXPORT_SYMBOL_GPL(inet_ctl_sock_create);



u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt)

{

	return  *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt);

}

EXPORT_SYMBOL_GPL(snmp_get_cpu_field);



unsigned long snmp_fold_field(void __percpu *mib, int offt)

{

	unsigned long res = 0;

	int i;



	for_each_possible_cpu(i)

		res += *(((unsigned long *) per_cpu_ptr(mib, i)) + offt);

		res += snmp_get_cpu_field(mib, i, offt);

	return res;

}

EXPORT_SYMBOL_GPL(snmp_fold_field);



#if BITS_PER_LONG==32



u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset)

u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,

			 size_t syncp_offset)

{

	u64 res = 0;

	int cpu;



	for_each_possible_cpu(cpu) {

	void *bhptr;

	struct u64_stats_sync *syncp;

	u64 v;
@@ -1483,7 +1486,17 @@ u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset) 
		v = *(((u64 *)bhptr) + offt);

	} while (u64_stats_fetch_retry_irq(syncp, start));



		res += v;

	return v;

}

EXPORT_SYMBOL_GPL(snmp_get_cpu_field64);



u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset)

{

	u64 res = 0;

	int cpu;



	for_each_possible_cpu(cpu) {

		res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset);

	}

	return res;

}