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-rw-r--r--include/net/xfrm.h6
-rw-r--r--net/ipv4/xfrm4_policy.c13
-rw-r--r--net/ipv4/xfrm4_state.c1
-rw-r--r--net/ipv6/xfrm6_policy.c14
-rw-r--r--net/ipv6/xfrm6_state.c1
-rw-r--r--net/xfrm/xfrm_state.c26
6 files changed, 24 insertions, 37 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 2143f2911a21..f0f3318f6550 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -253,7 +253,8 @@ extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
extern int __xfrm_state_delete(struct xfrm_state *x);
struct xfrm_state_afinfo {
- unsigned short family;
+ unsigned int family;
+ struct module *owner;
struct xfrm_type *type_map[IPPROTO_MAX];
struct xfrm_mode *mode_map[XFRM_MODE_MAX];
int (*init_flags)(struct xfrm_state *x);
@@ -267,8 +268,6 @@ struct xfrm_state_afinfo {
extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
-extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family);
-extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
@@ -312,6 +311,7 @@ struct xfrm_mode {
*/
int (*output)(struct xfrm_state *x,struct sk_buff *skb);
+ struct xfrm_state_afinfo *afinfo;
struct module *owner;
unsigned int encap;
int flags;
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 2373d673df60..c65b8e03c049 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -151,7 +151,6 @@ __xfrm4_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
i = 0;
for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
- struct xfrm_state_afinfo *afinfo;
x->u.rt.fl = *fl;
dst_prev->xfrm = xfrm[i++];
@@ -169,17 +168,7 @@ __xfrm4_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
/* Copy neighbout for reachability confirmation */
dst_prev->neighbour = neigh_clone(rt->u.dst.neighbour);
dst_prev->input = rt->u.dst.input;
- /* XXX: When IPv6 module can be unloaded, we should manage reference
- * to xfrm6_output in afinfo->output. Miyazawa
- * */
- afinfo = xfrm_state_get_afinfo(dst_prev->xfrm->props.family);
- if (!afinfo) {
- dst = *dst_p;
- err = -EAFNOSUPPORT;
- goto error;
- }
- dst_prev->output = afinfo->output;
- xfrm_state_put_afinfo(afinfo);
+ dst_prev->output = dst_prev->xfrm->mode->afinfo->output;
if (dst_prev->xfrm->props.family == AF_INET && rt->peer)
atomic_inc(&rt->peer->refcnt);
x->u.rt.peer = rt->peer;
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index 93e2c061cdda..13d54a1c3337 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -49,6 +49,7 @@ __xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl,
static struct xfrm_state_afinfo xfrm4_state_afinfo = {
.family = AF_INET,
+ .owner = THIS_MODULE,
.init_flags = xfrm4_init_flags,
.init_tempsel = __xfrm4_init_tempsel,
.output = xfrm4_output,
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index dc4bdcb55cbe..324268329f69 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -214,7 +214,6 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
i = 0;
for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
- struct xfrm_state_afinfo *afinfo;
dst_prev->xfrm = xfrm[i++];
dst_prev->dev = rt->u.dst.dev;
@@ -231,18 +230,7 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
/* Copy neighbour for reachability confirmation */
dst_prev->neighbour = neigh_clone(rt->u.dst.neighbour);
dst_prev->input = rt->u.dst.input;
- /* XXX: When IPv4 is implemented as module and can be unloaded,
- * we should manage reference to xfrm4_output in afinfo->output.
- * Miyazawa
- */
- afinfo = xfrm_state_get_afinfo(dst_prev->xfrm->props.family);
- if (!afinfo) {
- dst = *dst_p;
- goto error;
- }
-
- dst_prev->output = afinfo->output;
- xfrm_state_put_afinfo(afinfo);
+ dst_prev->output = dst_prev->xfrm->mode->afinfo->output;
/* Sheit... I remember I did this right. Apparently,
* it was magically lost, so this code needs audit */
x->u.rt6.rt6i_flags = rt0->rt6i_flags&(RTCF_BROADCAST|RTCF_MULTICAST|RTCF_LOCAL);
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index e644c80515fc..b392bee396f1 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -170,6 +170,7 @@ __xfrm6_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n)
static struct xfrm_state_afinfo xfrm6_state_afinfo = {
.family = AF_INET6,
+ .owner = THIS_MODULE,
.init_tempsel = __xfrm6_init_tempsel,
.tmpl_sort = __xfrm6_tmpl_sort,
.state_sort = __xfrm6_state_sort,
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index dc438f2b9442..48b4a06b3d1a 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -57,6 +57,9 @@ static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
static unsigned int xfrm_state_num;
static unsigned int xfrm_state_genid;
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
+
static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
xfrm_address_t *saddr,
u32 reqid,
@@ -289,11 +292,18 @@ int xfrm_register_mode(struct xfrm_mode *mode, int family)
err = -EEXIST;
modemap = afinfo->mode_map;
- if (likely(modemap[mode->encap] == NULL)) {
- modemap[mode->encap] = mode;
- err = 0;
- }
+ if (modemap[mode->encap])
+ goto out;
+ err = -ENOENT;
+ if (!try_module_get(afinfo->owner))
+ goto out;
+
+ mode->afinfo = afinfo;
+ modemap[mode->encap] = mode;
+ err = 0;
+
+out:
xfrm_state_unlock_afinfo(afinfo);
return err;
}
@@ -316,6 +326,7 @@ int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
modemap = afinfo->mode_map;
if (likely(modemap[mode->encap] == mode)) {
modemap[mode->encap] = NULL;
+ module_put(mode->afinfo->owner);
err = 0;
}
@@ -1869,7 +1880,7 @@ int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
}
EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
-struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
{
struct xfrm_state_afinfo *afinfo;
if (unlikely(family >= NPROTO))
@@ -1881,14 +1892,11 @@ struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
return afinfo;
}
-void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
{
read_unlock(&xfrm_state_afinfo_lock);
}
-EXPORT_SYMBOL(xfrm_state_get_afinfo);
-EXPORT_SYMBOL(xfrm_state_put_afinfo);
-
/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
void xfrm_state_delete_tunnel(struct xfrm_state *x)
{
generated by cgit (git 2.34.1) at 2024-06-03 15:25:14 +0000