diff options
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 640db9b90330..3ceb025b16f2 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1427,6 +1427,42 @@ unsigned long snmp_fold_field(void __percpu *mib[], int offt) } 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 res = 0; + int cpu; + + for_each_possible_cpu(cpu) { + void *bhptr, *userptr; + struct u64_stats_sync *syncp; + u64 v_bh, v_user; + unsigned int start; + + /* first mib used by softirq context, we must use _bh() accessors */ + bhptr = per_cpu_ptr(SNMP_STAT_BHPTR(mib), cpu); + syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); + do { + start = u64_stats_fetch_begin_bh(syncp); + v_bh = *(((u64 *) bhptr) + offt); + } while (u64_stats_fetch_retry_bh(syncp, start)); + + /* second mib used in USER context */ + userptr = per_cpu_ptr(SNMP_STAT_USRPTR(mib), cpu); + syncp = (struct u64_stats_sync *)(userptr + syncp_offset); + do { + start = u64_stats_fetch_begin(syncp); + v_user = *(((u64 *) userptr) + offt); + } while (u64_stats_fetch_retry(syncp, start)); + + res += v_bh + v_user; + } + return res; +} +EXPORT_SYMBOL_GPL(snmp_fold_field64); +#endif + int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align) { BUG_ON(ptr == NULL); |