diff options
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index a33ca7e7e8f8..16aae8ef5555 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1219,6 +1219,46 @@ out: return segs; } +unsigned long snmp_fold_field(void *mib[], int offt) +{ + unsigned long res = 0; + int i; + + for_each_possible_cpu(i) { + res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt); + res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt); + } + return res; +} +EXPORT_SYMBOL_GPL(snmp_fold_field); + +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; +} +EXPORT_SYMBOL_GPL(snmp_mib_init); + +void snmp_mib_free(void *ptr[2]) +{ + BUG_ON(ptr == NULL); + free_percpu(ptr[0]); + free_percpu(ptr[1]); + ptr[0] = ptr[1] = NULL; +} +EXPORT_SYMBOL_GPL(snmp_mib_free); + #ifdef CONFIG_IP_MULTICAST static struct net_protocol igmp_protocol = { .handler = igmp_rcv, |