Commit 4c145dce authored by Florian Westphal's avatar Florian Westphal Committed by Steffen Klassert

xfrm: make xfrm modes builtin

after previous changes, xfrm_mode contains no function pointers anymore
and all modules defining such struct contain no code except an init/exit
functions to register the xfrm_mode struct with the xfrm core.

Just place the xfrm modes core and remove the modules,
the run-time xfrm_mode register/unregister functionality is removed.

Before:

    text    data     bss      dec filename
    7523     200    2364    10087 net/xfrm/xfrm_input.o
   40003     628     440    41071 net/xfrm/xfrm_state.o
15730338 6937080 4046908 26714326 vmlinux

    7389     200    2364    9953  net/xfrm/xfrm_input.o
   40574     656     440   41670  net/xfrm/xfrm_state.o
15730084 6937068 4046908 26714060 vmlinux

The xfrm*_mode_{transport,tunnel,beet} modules are gone.

v2: replace CONFIG_INET6_XFRM_MODE_* IS_ENABLED guards with CONFIG_IPV6
    ones rather than removing them.
Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Reviewed-by: default avatarSabrina Dubroca <sd@queasysnail.net>
Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
parent 733a5fac
......@@ -234,9 +234,9 @@ struct xfrm_state {
/* Reference to data common to all the instances of this
* transformer. */
const struct xfrm_type *type;
struct xfrm_mode *inner_mode;
struct xfrm_mode *inner_mode_iaf;
struct xfrm_mode *outer_mode;
const struct xfrm_mode *inner_mode;
const struct xfrm_mode *inner_mode_iaf;
const struct xfrm_mode *outer_mode;
const struct xfrm_type_offload *type_offload;
......@@ -347,7 +347,6 @@ struct xfrm_state_afinfo {
struct module *owner;
const struct xfrm_type *type_map[IPPROTO_MAX];
const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
struct xfrm_mode *mode_map[XFRM_MODE_MAX];
int (*init_flags)(struct xfrm_state *x);
void (*init_tempsel)(struct xfrm_selector *sel,
......@@ -423,7 +422,6 @@ int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned sh
int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
struct xfrm_mode {
struct module *owner;
u8 encap;
u8 family;
u8 flags;
......@@ -434,9 +432,6 @@ enum {
XFRM_MODE_FLAG_TUNNEL = 1,
};
int xfrm_register_mode(struct xfrm_mode *mode);
void xfrm_unregister_mode(struct xfrm_mode *mode);
static inline int xfrm_af2proto(unsigned int family)
{
switch(family) {
......@@ -449,7 +444,7 @@ static inline int xfrm_af2proto(unsigned int family)
}
}
static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
{
if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
(ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
......
......@@ -304,7 +304,7 @@ config NET_IPVTI
tristate "Virtual (secure) IP: tunneling"
select INET_TUNNEL
select NET_IP_TUNNEL
depends on INET_XFRM_MODE_TUNNEL
select XFRM
---help---
Tunneling means encapsulating data of one protocol type within
another protocol and sending it over a channel that understands the
......@@ -396,33 +396,6 @@ config INET_TUNNEL
tristate
default n
config INET_XFRM_MODE_TRANSPORT
tristate "IP: IPsec transport mode"
default y
select XFRM
---help---
Support for IPsec transport mode.
If unsure, say Y.
config INET_XFRM_MODE_TUNNEL
tristate "IP: IPsec tunnel mode"
default y
select XFRM
---help---
Support for IPsec tunnel mode.
If unsure, say Y.
config INET_XFRM_MODE_BEET
tristate "IP: IPsec BEET mode"
default y
select XFRM
---help---
Support for IPsec BEET mode.
If unsure, say Y.
config INET_DIAG
tristate "INET: socket monitoring interface"
default y
......
......@@ -37,10 +37,7 @@ obj-$(CONFIG_INET_ESP) += esp4.o
obj-$(CONFIG_INET_ESP_OFFLOAD) += esp4_offload.o
obj-$(CONFIG_INET_IPCOMP) += ipcomp.o
obj-$(CONFIG_INET_XFRM_TUNNEL) += xfrm4_tunnel.o
obj-$(CONFIG_INET_XFRM_MODE_BEET) += xfrm4_mode_beet.o
obj-$(CONFIG_INET_TUNNEL) += tunnel4.o
obj-$(CONFIG_INET_XFRM_MODE_TRANSPORT) += xfrm4_mode_transport.o
obj-$(CONFIG_INET_XFRM_MODE_TUNNEL) += xfrm4_mode_tunnel.o
obj-$(CONFIG_IP_PNP) += ipconfig.o
obj-$(CONFIG_NETFILTER) += netfilter.o netfilter/
obj-$(CONFIG_INET_DIAG) += inet_diag.o
......
......@@ -107,7 +107,7 @@ static int vti_rcv_cb(struct sk_buff *skb, int err)
struct net_device *dev;
struct pcpu_sw_netstats *tstats;
struct xfrm_state *x;
struct xfrm_mode *inner_mode;
const struct xfrm_mode *inner_mode;
struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4;
u32 orig_mark = skb->mark;
int ret;
......
/*
* xfrm4_mode_beet.c - BEET mode encapsulation for IPv4.
*
* Copyright (c) 2006 Diego Beltrami <diego.beltrami@gmail.com>
* Miika Komu <miika@iki.fi>
* Herbert Xu <herbert@gondor.apana.org.au>
* Abhinav Pathak <abhinav.pathak@hiit.fi>
* Jeff Ahrenholz <ahrenholz@gmail.com>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dst.h>
#include <net/ip.h>
#include <net/xfrm.h>
static struct xfrm_mode xfrm4_beet_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_BEET,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET,
};
static int __init xfrm4_beet_init(void)
{
return xfrm_register_mode(&xfrm4_beet_mode);
}
static void __exit xfrm4_beet_exit(void)
{
xfrm_unregister_mode(&xfrm4_beet_mode);
}
module_init(xfrm4_beet_init);
module_exit(xfrm4_beet_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_BEET);
/*
* xfrm4_mode_transport.c - Transport mode encapsulation for IPv4.
*
* Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dst.h>
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/protocol.h>
static struct xfrm_mode xfrm4_transport_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_TRANSPORT,
.family = AF_INET,
};
static int __init xfrm4_transport_init(void)
{
return xfrm_register_mode(&xfrm4_transport_mode);
}
static void __exit xfrm4_transport_exit(void)
{
xfrm_unregister_mode(&xfrm4_transport_mode);
}
module_init(xfrm4_transport_init);
module_exit(xfrm4_transport_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TRANSPORT);
/*
* xfrm4_mode_tunnel.c - Tunnel mode encapsulation for IPv4.
*
* Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dst.h>
#include <net/inet_ecn.h>
#include <net/ip.h>
#include <net/xfrm.h>
static struct xfrm_mode xfrm4_tunnel_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET,
};
static int __init xfrm4_mode_tunnel_init(void)
{
return xfrm_register_mode(&xfrm4_tunnel_mode);
}
static void __exit xfrm4_mode_tunnel_exit(void)
{
xfrm_unregister_mode(&xfrm4_tunnel_mode);
}
module_init(xfrm4_mode_tunnel_init);
module_exit(xfrm4_mode_tunnel_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TUNNEL);
......@@ -135,44 +135,11 @@ config INET6_TUNNEL
tristate
default n
config INET6_XFRM_MODE_TRANSPORT
tristate "IPv6: IPsec transport mode"
default IPV6
select XFRM
---help---
Support for IPsec transport mode.
If unsure, say Y.
config INET6_XFRM_MODE_TUNNEL
tristate "IPv6: IPsec tunnel mode"
default IPV6
select XFRM
---help---
Support for IPsec tunnel mode.
If unsure, say Y.
config INET6_XFRM_MODE_BEET
tristate "IPv6: IPsec BEET mode"
default IPV6
select XFRM
---help---
Support for IPsec BEET mode.
If unsure, say Y.
config INET6_XFRM_MODE_ROUTEOPTIMIZATION
tristate "IPv6: MIPv6 route optimization mode"
select XFRM
---help---
Support for MIPv6 route optimization mode.
config IPV6_VTI
tristate "Virtual (secure) IPv6: tunneling"
select IPV6_TUNNEL
select NET_IP_TUNNEL
depends on INET6_XFRM_MODE_TUNNEL
select XFRM
---help---
Tunneling means encapsulating data of one protocol type within
another protocol and sending it over a channel that understands the
......
......@@ -35,10 +35,6 @@ obj-$(CONFIG_INET6_ESP_OFFLOAD) += esp6_offload.o
obj-$(CONFIG_INET6_IPCOMP) += ipcomp6.o
obj-$(CONFIG_INET6_XFRM_TUNNEL) += xfrm6_tunnel.o
obj-$(CONFIG_INET6_TUNNEL) += tunnel6.o
obj-$(CONFIG_INET6_XFRM_MODE_TRANSPORT) += xfrm6_mode_transport.o
obj-$(CONFIG_INET6_XFRM_MODE_TUNNEL) += xfrm6_mode_tunnel.o
obj-$(CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION) += xfrm6_mode_ro.o
obj-$(CONFIG_INET6_XFRM_MODE_BEET) += xfrm6_mode_beet.o
obj-$(CONFIG_IPV6_MIP6) += mip6.o
obj-$(CONFIG_IPV6_ILA) += ila/
obj-$(CONFIG_NETFILTER) += netfilter/
......
......@@ -342,7 +342,7 @@ static int vti6_rcv_cb(struct sk_buff *skb, int err)
struct net_device *dev;
struct pcpu_sw_netstats *tstats;
struct xfrm_state *x;
struct xfrm_mode *inner_mode;
const struct xfrm_mode *inner_mode;
struct ip6_tnl *t = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6;
u32 orig_mark = skb->mark;
int ret;
......
/*
* xfrm6_mode_beet.c - BEET mode encapsulation for IPv6.
*
* Copyright (c) 2006 Diego Beltrami <diego.beltrami@gmail.com>
* Miika Komu <miika@iki.fi>
* Herbert Xu <herbert@gondor.apana.org.au>
* Abhinav Pathak <abhinav.pathak@hiit.fi>
* Jeff Ahrenholz <ahrenholz@gmail.com>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dsfield.h>
#include <net/dst.h>
#include <net/inet_ecn.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
static struct xfrm_mode xfrm6_beet_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_BEET,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET6,
};
static int __init xfrm6_beet_init(void)
{
return xfrm_register_mode(&xfrm6_beet_mode);
}
static void __exit xfrm6_beet_exit(void)
{
xfrm_unregister_mode(&xfrm6_beet_mode);
}
module_init(xfrm6_beet_init);
module_exit(xfrm6_beet_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_BEET);
/*
* xfrm6_mode_ro.c - Route optimization mode for IPv6.
*
* Copyright (C)2003-2006 Helsinki University of Technology
* Copyright (C)2003-2006 USAGI/WIDE Project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/*
* Authors:
* Noriaki TAKAMIYA @USAGI
* Masahide NAKAMURA @USAGI
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/stringify.h>
#include <linux/time.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
static struct xfrm_mode xfrm6_ro_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_ROUTEOPTIMIZATION,
.family = AF_INET6,
};
static int __init xfrm6_ro_init(void)
{
return xfrm_register_mode(&xfrm6_ro_mode);
}
static void __exit xfrm6_ro_exit(void)
{
xfrm_unregister_mode(&xfrm6_ro_mode);
}
module_init(xfrm6_ro_init);
module_exit(xfrm6_ro_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_ROUTEOPTIMIZATION);
/*
* xfrm6_mode_transport.c - Transport mode encapsulation for IPv6.
*
* Copyright (C) 2002 USAGI/WIDE Project
* Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dst.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
#include <net/protocol.h>
static struct xfrm_mode xfrm6_transport_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_TRANSPORT,
.family = AF_INET6,
};
static int __init xfrm6_transport_init(void)
{
return xfrm_register_mode(&xfrm6_transport_mode);
}
static void __exit xfrm6_transport_exit(void)
{
xfrm_unregister_mode(&xfrm6_transport_mode);
}
module_init(xfrm6_transport_init);
module_exit(xfrm6_transport_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_TRANSPORT);
/*
* xfrm6_mode_tunnel.c - Tunnel mode encapsulation for IPv6.
*
* Copyright (C) 2002 USAGI/WIDE Project
* Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dsfield.h>
#include <net/dst.h>
#include <net/inet_ecn.h>
#include <net/ip6_route.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
/* Add encapsulation header.
*
* The top IP header will be constructed per RFC 2401.
*/
static struct xfrm_mode xfrm6_tunnel_mode = {
.owner = THIS_MODULE,
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET6,
};
static int __init xfrm6_mode_tunnel_init(void)
{
return xfrm_register_mode(&xfrm6_tunnel_mode);
}
static void __exit xfrm6_mode_tunnel_exit(void)
{
xfrm_unregister_mode(&xfrm6_tunnel_mode);
}
module_init(xfrm6_mode_tunnel_init);
module_exit(xfrm6_mode_tunnel_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_TUNNEL);
......@@ -351,7 +351,7 @@ xfrm_inner_mode_encap_remove(struct xfrm_state *x,
static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
{
struct xfrm_mode *inner_mode = x->inner_mode;
const struct xfrm_mode *inner_mode = x->inner_mode;
const struct xfrm_state_afinfo *afinfo;
int err = -EAFNOSUPPORT;
......@@ -394,7 +394,6 @@ static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
*/
static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_INET_XFRM_MODE_TRANSPORT)
int ihl = skb->data - skb_transport_header(skb);
if (skb->transport_header != skb->network_header) {
......@@ -405,14 +404,11 @@ static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
ip_hdr(skb)->tot_len = htons(skb->len + ihl);
skb_reset_transport_header(skb);
return 0;
#else
return -EOPNOTSUPP;
#endif
}
static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_INET6_XFRM_MODE_TRANSPORT)
#if IS_ENABLED(CONFIG_IPV6)
int ihl = skb->data - skb_transport_header(skb);
if (skb->transport_header != skb->network_header) {
......@@ -425,7 +421,8 @@ static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
skb_reset_transport_header(skb);
return 0;
#else
return -EOPNOTSUPP;
WARN_ON_ONCE(1);
return -EAFNOSUPPORT;
#endif
}
......@@ -458,12 +455,12 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
{
const struct xfrm_state_afinfo *afinfo;
struct net *net = dev_net(skb->dev);
const struct xfrm_mode *inner_mode;
int err;
__be32 seq;
__be32 seq_hi;
struct xfrm_state *x = NULL;
xfrm_address_t *daddr;
struct xfrm_mode *inner_mode;
u32 mark = skb->mark;
unsigned int family = AF_UNSPEC;
int decaps = 0;
......
......@@ -244,8 +244,8 @@ static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
{
const struct xfrm_mode *inner_mode;
struct pcpu_sw_netstats *tstats;
struct xfrm_mode *inner_mode;
struct net_device *dev;
struct xfrm_state *x;
struct xfrm_if *xi;
......
......@@ -61,7 +61,6 @@ static struct dst_entry *skb_dst_pop(struct sk_buff *skb)
*/
static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_INET_XFRM_MODE_TRANSPORT)
struct iphdr *iph = ip_hdr(skb);
int ihl = iph->ihl * 4;
......@@ -74,10 +73,6 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
__skb_pull(skb, ihl);
memmove(skb_network_header(skb), iph, ihl);
return 0;
#else
WARN_ON_ONCE(1);
return -EOPNOTSUPP;
#endif
}
/* Add encapsulation header.
......@@ -87,7 +82,7 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
*/
static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_INET6_XFRM_MODE_TRANSPORT)
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6hdr *iph;
u8 *prevhdr;
int hdr_len;
......@@ -107,7 +102,7 @@ static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
return 0;
#else
WARN_ON_ONCE(1);
return -EOPNOTSUPP;
return -EAFNOSUPPORT;
#endif
}
......@@ -118,7 +113,7 @@ static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
*/
static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION)
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6hdr *iph;
u8 *prevhdr;
int hdr_len;
......@@ -140,7 +135,7 @@ static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb)
return 0;
#else
WARN_ON_ONCE(1);
return -EOPNOTSUPP;
return -EAFNOSUPPORT;
#endif
}
......@@ -624,7 +619,7 @@ EXPORT_SYMBOL_GPL(xfrm_output);
static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
{
const struct xfrm_state_afinfo *afinfo;
struct xfrm_mode *inner_mode;
const struct xfrm_mode *inner_mode;
int err = -EAFNOSUPPORT;
if (x->sel.family == AF_UNSPEC)
......
......@@ -2546,10 +2546,10 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
struct dst_entry *dst)
{
const struct xfrm_state_afinfo *afinfo;
const struct xfrm_mode *inner_mode;
struct net *net = xp_net(policy);
unsigned long now = jiffies;
struct net_device *dev;
struct xfrm_mode *inner_mode;
struct xfrm_dst *xdst_prev = NULL;
struct xfrm_dst *xdst0 = NULL;
int i = 0;
......
......@@ -330,92 +330,67 @@ static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
module_put(type->owner);
}
static DEFINE_SPINLOCK(xfrm_mode_lock);
int xfrm_register_mode(struct xfrm_mode *mode)
{
struct xfrm_state_afinfo *afinfo;
struct xfrm_mode **modemap;
int err;
if (unlikely(mode->encap >= XFRM_MODE_MAX))
return -EINVAL;
afinfo = xfrm_state_get_afinfo(mode->family);
if (unlikely(afinfo == NULL))
return -EAFNOSUPPORT;
err = -EEXIST;
modemap = afinfo->mode_map;
spin_lock_bh(&xfrm_mode_lock);
if (modemap[mode->encap])
goto out;
err = -ENOENT;
if (!try_module_get(afinfo->owner))
goto out;
modemap[mode->encap] = mode;
err = 0;
out:
spin_unlock_bh(&xfrm_mode_lock);
rcu_read_unlock();
return err;
}
EXPORT_SYMBOL(xfrm_register_mode);
void xfrm_unregister_mode(struct xfrm_mode *mode)
{
struct xfrm_state_afinfo *afinfo;
struct xfrm_mode **modemap;
afinfo = xfrm_state_get_afinfo(mode->family);
if (WARN_ON_ONCE(!afinfo))
return;
modemap = afinfo->mode_map;
spin_lock_bh(&xfrm_mode_lock);
if (likely(modemap[mode->encap] == mode)) {
modemap[mode->encap] = NULL;
module_put(afinfo->owner);
}
spin_unlock_bh(&xfrm_mode_lock);
rcu_read_unlock();
}
EXPORT_SYMBOL(xfrm_unregister_mode);
static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
{
struct xfrm_state_afinfo *afinfo;
struct xfrm_mode *mode;
int modload_attempted = 0;
static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = {
[XFRM_MODE_BEET] = {
.encap = XFRM_MODE_BEET,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET,
},
[XFRM_MODE_TRANSPORT] = {
.encap = XFRM_MODE_TRANSPORT,
.family = AF_INET,
},
[XFRM_MODE_TUNNEL] = {
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET,
},
};
static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
[XFRM_MODE_BEET] = {
.encap = XFRM_MODE_BEET,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET6,
},
[XFRM_MODE_ROUTEOPTIMIZATION] = {
.encap = XFRM_MODE_ROUTEOPTIMIZATION,
.family = AF_INET6,
},
[XFRM_MODE_TRANSPORT] = {
.encap = XFRM_MODE_TRANSPORT,
.family = AF_INET6,
},
[XFRM_MODE_TUNNEL] = {
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET6,
},
};
static const struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
{
const struct xfrm_mode *mode;
if (unlikely(encap >= XFRM_MODE_MAX))
return NULL;
retry:
afinfo = xfrm_state_get_afinfo(family);
if (unlikely(afinfo == NULL))
return NULL;
mode = READ_ONCE(afinfo->mode_map[encap]);
if (unlikely(mode && !try_module_get(mode->owner)))
mode = NULL;
rcu_read_unlock();
if (!mode && !modload_attempted) {
request_module("xfrm-mode-%d-%d", family, encap);
modload_attempted = 1;
goto retry;
}
switch (family) {
case AF_INET:
mode = &xfrm4_mode_map[encap];
if (mode->family == family)
return mode;
}
break;
case AF_INET6:
mode = &xfrm6_mode_map[encap];
if (mode->family == family)
return mode;
break;
default:
break;
}
static void xfrm_put_mode(struct xfrm_mode *mode)
{
module_put(mode->owner);
return NULL;
}
void xfrm_state_free(struct xfrm_state *x)
......@@ -436,12 +411,6 @@ static void ___xfrm_state_destroy(struct xfrm_state *x)
kfree(x->coaddr);
kfree(x->replay_esn);
kfree(x->preplay_esn);
if (x->inner_mode)
xfrm_put_mode(x->inner_mode);
if (x->inner_mode_iaf)
xfrm_put_mode(x->inner_mode_iaf);
if (x->outer_mode)
xfrm_put_mode(x->outer_mode);
if (x->type_offload)
xfrm_put_type_offload(x->type_offload);
if (x->type) {
......@@ -2235,8 +2204,8 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu)
int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
{
struct xfrm_state_afinfo *afinfo;
struct xfrm_mode *inner_mode;
const struct xfrm_mode *inner_mode;
const struct xfrm_state_afinfo *afinfo;
int family = x->props.family;
int err;
......@@ -2262,24 +2231,21 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
goto error;
if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
family != x->sel.family) {
xfrm_put_mode(inner_mode);
family != x->sel.family)
goto error;
}
x->inner_mode = inner_mode;
} else {
struct xfrm_mode *inner_mode_iaf;
const struct xfrm_mode *inner_mode_iaf;
int iafamily = AF_INET;
inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
if (inner_mode == NULL)
goto error;
if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
xfrm_put_mode(inner_mode);
if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL))
goto error;
}
x->inner_mode = inner_mode;
if (x->props.family == AF_INET)
......@@ -2289,8 +2255,6 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
if (inner_mode_iaf) {
if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
x->inner_mode_iaf = inner_mode_iaf;
else
xfrm_put_mode(inner_mode_iaf);
}
}
......
......@@ -7,9 +7,7 @@ CONFIG_NET_L3_MASTER_DEV=y
CONFIG_IPV6=y
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_VETH=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_NET_IPVTI=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
CONFIG_IPV6_VTI=y
CONFIG_DUMMY=y
CONFIG_BRIDGE=y
......
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