netfilter: constify nf_loginfo structures

The nf_loginfo structures are only passed as the seventh argument to
nf_log_trace, which is declared as const or stored in a local const
variable.  Thus the nf_loginfo structures themselves can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct nf_loginfo i@p = { ... };

@ok1@
identifier r.i;
expression list[6] es;
position p;
@@
 nf_log_trace(es,&i@p,...)

@ok2@
identifier r.i;
const struct nf_loginfo *e;
position p;
@@
 e = &i@p

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
struct nf_loginfo e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct nf_loginfo i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/ipv4/netfilter/ip_tables.c

@@ -151,7 +151,7 @@ static const char *const comments[] = {
 	[NF_IP_TRACE_COMMENT_POLICY]	= "policy",
 };
 
-static struct nf_loginfo trace_loginfo = {
+static const struct nf_loginfo trace_loginfo = {
 	.type = NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/ipv4/netfilter/nf_log_arp.c

@@ -25,7 +25,7 @@
 #include <linux/netfilter/xt_LOG.h>
 #include <net/netfilter/nf_log.h>
 
-static struct nf_loginfo default_loginfo = {
+static const struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/ipv4/netfilter/nf_log_ipv4.c

@@ -24,7 +24,7 @@
 #include <linux/netfilter/xt_LOG.h>
 #include <net/netfilter/nf_log.h>
 
-static struct nf_loginfo default_loginfo = {
+static const struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/ipv6/netfilter/ip6_tables.c

@@ -176,7 +176,7 @@ static const char *const comments[] = {
 	[NF_IP6_TRACE_COMMENT_POLICY]	= "policy",
 };
 
-static struct nf_loginfo trace_loginfo = {
+static const struct nf_loginfo trace_loginfo = {
 	.type = NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/ipv6/netfilter/nf_log_ipv6.c

@@ -25,7 +25,7 @@
 #include <linux/netfilter/xt_LOG.h>
 #include <net/netfilter/nf_log.h>
 
-static struct nf_loginfo default_loginfo = {
+static const struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/netfilter/nf_tables_core.c

@@ -29,7 +29,7 @@ static const char *const comments[__NFT_TRACETYPE_MAX] = {
 	[NFT_TRACETYPE_RULE]	= "rule",
 };
 
-static struct nf_loginfo trace_loginfo = {
+static const struct nf_loginfo trace_loginfo = {
 	.type = NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/netfilter/nfnetlink_log.c

@@ -606,7 +606,7 @@ nla_put_failure:
 	return -1;
 }
 
-static struct nf_loginfo default_loginfo = {
+static const struct nf_loginfo default_loginfo = {
 	.type =		NF_LOG_TYPE_ULOG,
 	.u = {
 		.ulog = {