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net: Introduce helper functions to get the per cpu data

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Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raghavendra K T 2015-08-30 11:29:41 +05:30 committed by David S. Miller
parent 06fb4e701b
commit c4c6bc3146
2 changed files with 37 additions and 14 deletions
include/net
ip.h
net/ipv4
af_inet.c

10
include/net/ip.h
View File

@ -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_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) #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); unsigned long snmp_fold_field(void __percpu *mib, int offt);
#if BITS_PER_LONG==32 #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); u64 snmp_fold_field64(void __percpu *mib, int offt, size_t sync_off);
#else #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) static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off)
{ {
return snmp_fold_field(mib, offt); return snmp_fold_field(mib, offt);

27
net/ipv4/af_inet.c
View File

@ -1452,25 +1452,28 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family,
} }
EXPORT_SYMBOL_GPL(inet_ctl_sock_create); 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 snmp_fold_field(void __percpu *mib, int offt)
{ {
unsigned long res = 0; unsigned long res = 0;
int i; int i;
for_each_possible_cpu(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; return res;
} }
EXPORT_SYMBOL_GPL(snmp_fold_field); EXPORT_SYMBOL_GPL(snmp_fold_field);
#if BITS_PER_LONG==32 #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; void *bhptr;
struct u64_stats_sync *syncp; struct u64_stats_sync *syncp;
u64 v; u64 v;
@ -1483,7 +1486,17 @@ u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset)
v = *(((u64 *)bhptr) + offt); v = *(((u64 *)bhptr) + offt);
} while (u64_stats_fetch_retry_irq(syncp, start)); } 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; return res;
} }