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netfilter: constify nf_conntrack_l3/4proto parameters 

When a nf_conntrack_l3/4proto parameter is not on the left hand side
of an assignment, its address is not taken, and it is not passed to a
function that may modify its fields, then it can be declared as const.

This change is useful from a documentation point of view, and can
possibly facilitate making some nf_conntrack_l3/4proto structures const
subsequently.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Julia Lawall 2017-08-01 12:25:01 +02:00 committed by Pablo Neira Ayuso
parent 5b9ccdcb98
commit 2a04aabf5c
6 changed files with 30 additions and 29 deletions
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14
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -125,23 +125,23 @@ struct nf_conntrack_l4proto *__nf_ct_l4proto_find(u_int16_t l3proto,
struct nf_conntrack_l4proto *nf_ct_l4proto_find_get(u_int16_t l3proto,
u_int8_t l4proto);
void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
void nf_ct_l4proto_put(const struct nf_conntrack_l4proto *p);
/* Protocol pernet registration. */
int nf_ct_l4proto_pernet_register_one(struct net *net,
struct nf_conntrack_l4proto *proto);
const struct nf_conntrack_l4proto *proto);
void nf_ct_l4proto_pernet_unregister_one(struct net *net,
struct nf_conntrack_l4proto *proto);
const struct nf_conntrack_l4proto *proto);
int nf_ct_l4proto_pernet_register(struct net *net,
struct nf_conntrack_l4proto *proto[],
struct nf_conntrack_l4proto *const proto[],
unsigned int num_proto);
void nf_ct_l4proto_pernet_unregister(struct net *net,
struct nf_conntrack_l4proto *proto[],
unsigned int num_proto);
struct nf_conntrack_l4proto *const proto[],
unsigned int num_proto);
/* Protocol global registration. */
int nf_ct_l4proto_register_one(struct nf_conntrack_l4proto *proto);
void nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *proto);
void nf_ct_l4proto_unregister_one(const struct nf_conntrack_l4proto *proto);
int nf_ct_l4proto_register(struct nf_conntrack_l4proto *proto[],
unsigned int num_proto);
void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *proto[],

2
include/net/netfilter/nf_conntrack_timeout.h
View File

@ -68,7 +68,7 @@ struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct,
static inline unsigned int *
nf_ct_timeout_lookup(struct net *net, struct nf_conn *ct,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l4proto *l4proto)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
struct nf_conn_timeout *timeout_ext;

8
net/netfilter/nf_conntrack_core.c
View File

@ -1176,8 +1176,8 @@ EXPORT_SYMBOL_GPL(nf_conntrack_free);
static noinline struct nf_conntrack_tuple_hash *
init_conntrack(struct net *net, struct nf_conn *tmpl,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l3proto *l3proto,
struct nf_conntrack_l4proto *l4proto,
const struct nf_conntrack_l3proto *l3proto,
const struct nf_conntrack_l4proto *l4proto,
struct sk_buff *skb,
unsigned int dataoff, u32 hash)
{
@ -1288,8 +1288,8 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
unsigned int dataoff,
u_int16_t l3num,
u_int8_t protonum,
struct nf_conntrack_l3proto *l3proto,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l3proto *l3proto,
const struct nf_conntrack_l4proto *l4proto)
{
const struct nf_conntrack_zone *zone;
struct nf_conntrack_tuple tuple;

6
net/netfilter/nf_conntrack_netlink.c
View File

@ -61,8 +61,8 @@ MODULE_LICENSE("GPL");
static char __initdata version[] = "0.93";
static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
struct nlattr *nest_parms;
@ -86,7 +86,7 @@ nla_put_failure:
static int ctnetlink_dump_tuples_ip(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l3proto *l3proto)
const struct nf_conntrack_l3proto *l3proto)
{
int ret = 0;
struct nlattr *nest_parms;

24
net/netfilter/nf_conntrack_proto.c
View File

@ -188,7 +188,7 @@ nf_ct_l4proto_find_get(u_int16_t l3num, u_int8_t l4num)
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_find_get);
void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p)
void nf_ct_l4proto_put(const struct nf_conntrack_l4proto *p)
{
module_put(p->me);
}
@ -257,7 +257,7 @@ void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto)
EXPORT_SYMBOL_GPL(nf_ct_l3proto_unregister);
static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l4proto *l4proto)
{
if (l4proto->get_net_proto) {
/* statically built-in protocols use static per-net */
@ -272,7 +272,7 @@ static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
static
int nf_ct_l4proto_register_sysctl(struct net *net,
struct nf_proto_net *pn,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l4proto *l4proto)
{
int err = 0;
@ -295,8 +295,8 @@ int nf_ct_l4proto_register_sysctl(struct net *net,
static
void nf_ct_l4proto_unregister_sysctl(struct net *net,
struct nf_proto_net *pn,
struct nf_conntrack_l4proto *l4proto)
struct nf_proto_net *pn,
const struct nf_conntrack_l4proto *l4proto)
{
#ifdef CONFIG_SYSCTL
if (pn->ctl_table_header != NULL)
@ -366,7 +366,7 @@ out_unlock:
EXPORT_SYMBOL_GPL(nf_ct_l4proto_register_one);
int nf_ct_l4proto_pernet_register_one(struct net *net,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
struct nf_proto_net *pn = NULL;
@ -391,7 +391,7 @@ out:
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_register_one);
static void __nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
static void __nf_ct_l4proto_unregister_one(const struct nf_conntrack_l4proto *l4proto)
{
BUG_ON(l4proto->l3proto >= ARRAY_SIZE(nf_ct_protos));
@ -404,7 +404,7 @@ static void __nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
&nf_conntrack_l4proto_generic);
}
void nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
void nf_ct_l4proto_unregister_one(const struct nf_conntrack_l4proto *l4proto)
{
mutex_lock(&nf_ct_proto_mutex);
__nf_ct_l4proto_unregister_one(l4proto);
@ -415,7 +415,7 @@ void nf_ct_l4proto_unregister_one(struct nf_conntrack_l4proto *l4proto)
EXPORT_SYMBOL_GPL(nf_ct_l4proto_unregister_one);
void nf_ct_l4proto_pernet_unregister_one(struct net *net,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l4proto *l4proto)
{
struct nf_proto_net *pn = nf_ct_l4proto_net(net, l4proto);
@ -449,7 +449,7 @@ int nf_ct_l4proto_register(struct nf_conntrack_l4proto *l4proto[],
EXPORT_SYMBOL_GPL(nf_ct_l4proto_register);
int nf_ct_l4proto_pernet_register(struct net *net,
struct nf_conntrack_l4proto *l4proto[],
struct nf_conntrack_l4proto *const l4proto[],
unsigned int num_proto)
{
int ret = -EINVAL;
@ -485,8 +485,8 @@ void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *l4proto[],
EXPORT_SYMBOL_GPL(nf_ct_l4proto_unregister);
void nf_ct_l4proto_pernet_unregister(struct net *net,
struct nf_conntrack_l4proto *l4proto[],
unsigned int num_proto)
struct nf_conntrack_l4proto *const l4proto[],
unsigned int num_proto)
{
while (num_proto-- != 0)
nf_ct_l4proto_pernet_unregister_one(net, l4proto[num_proto]);

5
net/netfilter/nfnetlink_cttimeout.c
View File

@ -47,7 +47,8 @@ static const struct nla_policy cttimeout_nla_policy[CTA_TIMEOUT_MAX+1] = {
};
static int
ctnl_timeout_parse_policy(void *timeouts, struct nf_conntrack_l4proto *l4proto,
ctnl_timeout_parse_policy(void *timeouts,
const struct nf_conntrack_l4proto *l4proto,
struct net *net, const struct nlattr *attr)
{
int ret = 0;
@ -401,7 +402,7 @@ err:
static int
cttimeout_default_fill_info(struct net *net, struct sk_buff *skb, u32 portid,
u32 seq, u32 type, int event,
struct nf_conntrack_l4proto *l4proto)
const struct nf_conntrack_l4proto *l4proto)
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;