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snmp: add align parameter to snmp_mib_init()

Browse source 
In preparation for 64bit snmp counters for some mibs,
add an 'align' parameter to snmp_mib_init(), instead
of assuming mibs only contain 'unsigned long' fields.

Callers can use __alignof__(type) to provide correct
alignment.

Signed-off-by: Eric Dumazet <[email protected]>
CC: Herbert Xu <[email protected]>
CC: Arnaldo Carvalho de Melo <[email protected]>
CC: Hideaki YOSHIFUJI <[email protected]>
CC: Vlad Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2010-06-22 20:58:41 +00:00 • committed by David S. Miller
commit 1823e4c80e
7 changed files with 40 additions and 22 deletions
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27
net/ipv4/af_inet.c
View file

@ -1427,13 +1427,13 @@ unsigned long snmp_fold_field(void __percpu *mib[], int offt)
}
EXPORT_SYMBOL_GPL(snmp_fold_field);
int snmp_mib_init(void __percpu *ptr[2], size_t mibsize)
int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align)
{
BUG_ON(ptr == NULL);
ptr[0] = __alloc_percpu(mibsize, __alignof__(unsigned long));
ptr[0] = __alloc_percpu(mibsize, align);
if (!ptr[0])
goto err0;
ptr[1] = __alloc_percpu(mibsize, __alignof__(unsigned long));
ptr[1] = __alloc_percpu(mibsize, align);
if (!ptr[1])
goto err1;
return 0;
@ -1490,25 +1490,32 @@ static const struct net_protocol icmp_protocol = {
static __net_init int ipv4_mib_init_net(struct net *net)
{
if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics,
sizeof(struct tcp_mib)) < 0)
sizeof(struct tcp_mib),
__alignof__(struct tcp_mib)) < 0)
goto err_tcp_mib;
if (snmp_mib_init((void __percpu **)net->mib.ip_statistics,
sizeof(struct ipstats_mib)) < 0)
sizeof(struct ipstats_mib),
__alignof__(struct ipstats_mib)) < 0)
goto err_ip_mib;
if (snmp_mib_init((void __percpu **)net->mib.net_statistics,
sizeof(struct linux_mib)) < 0)
sizeof(struct linux_mib),
__alignof__(struct linux_mib)) < 0)
goto err_net_mib;
if (snmp_mib_init((void __percpu **)net->mib.udp_statistics,
sizeof(struct udp_mib)) < 0)
sizeof(struct udp_mib),
__alignof__(struct udp_mib)) < 0)
goto err_udp_mib;
if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics,
sizeof(struct udp_mib)) < 0)
sizeof(struct udp_mib),
__alignof__(struct udp_mib)) < 0)
goto err_udplite_mib;
if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics,
sizeof(struct icmp_mib)) < 0)
sizeof(struct icmp_mib),
__alignof__(struct icmp_mib)) < 0)
goto err_icmp_mib;
if (snmp_mib_init((void __percpu **)net->mib.icmpmsg_statistics,
sizeof(struct icmpmsg_mib)) < 0)
sizeof(struct icmpmsg_mib),
__alignof__(struct icmpmsg_mib)) < 0)
goto err_icmpmsg_mib;
tcp_mib_init(net);