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snmp: 64bit ipstats_mib for all arches

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/proc/net/snmp and /proc/net/netstat expose SNMP counters.

Width of these counters is either 32 or 64 bits, depending on the size
of "unsigned long" in kernel.

This means user program parsing these files must already be prepared to
deal with 64bit values, regardless of user program being 32 or 64 bit.

This patch introduces 64bit snmp values for IPSTAT mib, where some
counters can wrap pretty fast if they are 32bit wide.

# netstat -s|egrep "InOctets|OutOctets"
    InOctets: 244068329096
    OutOctets: 244069348848

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-06-30 13:31:19 -07:00 • committed by David S. Miller
parent f3eb62d2cc
commit 4ce3c183fc
7 changed files with 167 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

17
net/ipv6/proc.c
View file

@ -174,17 +174,28 @@ static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **mib,
const struct snmp_mib *itemlist)
{
int i;
for (i=0; itemlist[i].name; i++)
for (i = 0; itemlist[i].name; i++)
seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
snmp_fold_field(mib, itemlist[i].entry));
}
static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
const struct snmp_mib *itemlist, size_t syncpoff)
{
int i;
for (i = 0; itemlist[i].name; i++)
seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
}
static int snmp6_seq_show(struct seq_file *seq, void *v)
{
struct net *net = (struct net *)seq->private;
snmp6_seq_show_item(seq, (void __percpu **)net->mib.ipv6_statistics,
snmp6_ipstats_list);
snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
snmp6_icmp6_list);
snmp6_seq_show_icmpv6msg(seq,