From c4c6bc314618f60ba69b0cbf93e506e4c38a11d2 Mon Sep 17 00:00:00 2001 From: Raghavendra K T Date: Sun, 30 Aug 2015 11:29:41 +0530 Subject: net: Introduce helper functions to get the per cpu data Signed-off-by: Raghavendra K T Signed-off-by: David S. Miller --- net/ipv4/af_inet.c | 41 +++++++++++++++++++++++++++-------------- 1 file changed, 27 insertions(+), 14 deletions(-) (limited to 'net') diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 675e88c..0c69c0b 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1452,38 +1452,51 @@ 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_get_cpu_field64(void __percpu *mib, int cpu, int offct, + size_t syncp_offset) +{ + void *bhptr; + struct u64_stats_sync *syncp; + u64 v; + unsigned int start; + + bhptr = per_cpu_ptr(mib, cpu); + syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); + do { + start = u64_stats_fetch_begin_irq(syncp); + v = *(((u64 *)bhptr) + offt); + } while (u64_stats_fetch_retry_irq(syncp, start)); + + 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) { - void *bhptr; - struct u64_stats_sync *syncp; - u64 v; - unsigned int start; - - bhptr = per_cpu_ptr(mib, cpu); - syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); - do { - start = u64_stats_fetch_begin_irq(syncp); - v = *(((u64 *) bhptr) + offt); - } while (u64_stats_fetch_retry_irq(syncp, start)); - - res += v; + res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset); } return res; } -- cgit v1.1