[XFRM]: constify 'struct xfrm_type'

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/xfrm.h

@@ -202,7 +202,7 @@ struct xfrm_state
 
 	/* Reference to data common to all the instances of this
 	 * transformer. */
-	struct xfrm_type	*type;
+	const struct xfrm_type	*type;
 	struct xfrm_mode	*inner_mode;
 	struct xfrm_mode	*outer_mode;
 
@@ -279,7 +279,7 @@ struct xfrm_state_afinfo {
 	unsigned int		proto;
 	unsigned int		eth_proto;
 	struct module		*owner;
-	struct xfrm_type	*type_map[IPPROTO_MAX];
+	const struct xfrm_type	*type_map[IPPROTO_MAX];
 	struct xfrm_mode	*mode_map[XFRM_MODE_MAX];
 	int			(*init_flags)(struct xfrm_state *x);
 	void			(*init_tempsel)(struct xfrm_state *x, struct flowi *fl,
@@ -322,8 +322,8 @@ struct xfrm_type
 	u32			(*get_mtu)(struct xfrm_state *, int size);
 };
 
-extern int xfrm_register_type(struct xfrm_type *type, unsigned short family);
-extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family);
+extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
+extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
 
 struct xfrm_mode {
 	/*

net/ipv4/ah4.c

@@ -300,7 +300,7 @@ static void ah_destroy(struct xfrm_state *x)
 }
 
 
-static struct xfrm_type ah_type =
+static const struct xfrm_type ah_type =
 {
 	.description	= "AH4",
 	.owner		= THIS_MODULE,

net/ipv4/esp4.c

@@ -600,7 +600,7 @@ static int esp_init_state(struct xfrm_state *x)
 	return err;
 }
 
-static struct xfrm_type esp_type =
+static const struct xfrm_type esp_type =
 {
 	.description	= "ESP4",
 	.owner		= THIS_MODULE,

net/ipv4/ipcomp.c

@@ -437,7 +437,7 @@ static int ipcomp_init_state(struct xfrm_state *x)
 	goto out;
 }
 
-static struct xfrm_type ipcomp_type = {
+static const struct xfrm_type ipcomp_type = {
 	.description	= "IPCOMP4",
 	.owner		= THIS_MODULE,
 	.proto	     	= IPPROTO_COMP,

net/ipv4/xfrm4_tunnel.c

@@ -38,7 +38,7 @@ static void ipip_destroy(struct xfrm_state *x)
 {
 }
 
-static struct xfrm_type ipip_type = {
+static const struct xfrm_type ipip_type = {
 	.description	= "IPIP",
 	.owner		= THIS_MODULE,
 	.proto	     	= IPPROTO_IPIP,

net/ipv6/ah6.c

@@ -515,7 +515,7 @@ static void ah6_destroy(struct xfrm_state *x)
 	kfree(ahp);
 }
 
-static struct xfrm_type ah6_type =
+static const struct xfrm_type ah6_type =
 {
 	.description	= "AH6",
 	.owner		= THIS_MODULE,

net/ipv6/esp6.c

@@ -538,7 +538,7 @@ static int esp6_init_state(struct xfrm_state *x)
 	return err;
 }
 
-static struct xfrm_type esp6_type =
+static const struct xfrm_type esp6_type =
 {
 	.description	= "ESP6",
 	.owner	     	= THIS_MODULE,

net/ipv6/ipcomp6.c

@@ -453,7 +453,7 @@ static int ipcomp6_init_state(struct xfrm_state *x)
 	goto out;
 }
 
-static struct xfrm_type ipcomp6_type =
+static const struct xfrm_type ipcomp6_type =
 {
 	.description	= "IPCOMP6",
 	.owner		= THIS_MODULE,

net/ipv6/mip6.c

@@ -330,7 +330,7 @@ static void mip6_destopt_destroy(struct xfrm_state *x)
 {
 }
 
-static struct xfrm_type mip6_destopt_type =
+static const struct xfrm_type mip6_destopt_type =
 {
 	.description	= "MIP6DESTOPT",
 	.owner		= THIS_MODULE,
@@ -462,7 +462,7 @@ static void mip6_rthdr_destroy(struct xfrm_state *x)
 {
 }
 
-static struct xfrm_type mip6_rthdr_type =
+static const struct xfrm_type mip6_rthdr_type =
 {
 	.description	= "MIP6RT",
 	.owner		= THIS_MODULE,

net/ipv6/xfrm6_tunnel.c

@@ -319,7 +319,7 @@ static void xfrm6_tunnel_destroy(struct xfrm_state *x)
 	xfrm6_tunnel_free_spi((xfrm_address_t *)&x->props.saddr);
 }
 
-static struct xfrm_type xfrm6_tunnel_type = {
+static const struct xfrm_type xfrm6_tunnel_type = {
 	.description	= "IP6IP6",
 	.owner          = THIS_MODULE,
 	.proto		= IPPROTO_IPV6,

net/xfrm/xfrm_state.c

@@ -216,10 +216,10 @@ static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
 	write_unlock_bh(&xfrm_state_afinfo_lock);
 }
 
-int xfrm_register_type(struct xfrm_type *type, unsigned short family)
+int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
 {
 	struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
-	struct xfrm_type **typemap;
+	const struct xfrm_type **typemap;
 	int err = 0;
 
 	if (unlikely(afinfo == NULL))
@@ -235,10 +235,10 @@ int xfrm_register_type(struct xfrm_type *type, unsigned short family)
 }
 EXPORT_SYMBOL(xfrm_register_type);
 
-int xfrm_unregister_type(struct xfrm_type *type, unsigned short family)
+int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
 {
 	struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
-	struct xfrm_type **typemap;
+	const struct xfrm_type **typemap;
 	int err = 0;
 
 	if (unlikely(afinfo == NULL))
@@ -254,11 +254,11 @@ int xfrm_unregister_type(struct xfrm_type *type, unsigned short family)
 }
 EXPORT_SYMBOL(xfrm_unregister_type);
 
-static struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
+static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
 {
 	struct xfrm_state_afinfo *afinfo;
-	struct xfrm_type **typemap;
-	struct xfrm_type *type;
+	const struct xfrm_type **typemap;
+	const struct xfrm_type *type;
 	int modload_attempted = 0;
 
 retry:
@@ -281,7 +281,7 @@ static struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
 	return type;
 }
 
-static void xfrm_put_type(struct xfrm_type *type)
+static void xfrm_put_type(const struct xfrm_type *type)
 {
 	module_put(type->owner);
 }