Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=25ee3286dcbc830a833354bb1d15567956844813
Commit:     25ee3286dcbc830a833354bb1d15567956844813
Parent:     66cdb3ca27323a92712d289fc5edc7841d74a139
Author:     Herbert Xu <[EMAIL PROTECTED]>
AuthorDate: Tue Dec 11 09:32:34 2007 -0800
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 14:53:43 2008 -0800

    [IPSEC]: Merge common code into xfrm_bundle_create
    
    Half of the code in xfrm4_bundle_create and xfrm6_bundle_create are
    common.  This patch extracts that logic and puts it into
    xfrm_bundle_create.  The rest of it are then accessed through afinfo.
    
    As a result this fixes the problem with inter-family transforms where
    we treat every xfrm dst in the bundle as if it belongs to the top
    family.
    
    This patch also fixes a long-standing error-path bug where we may free
    the xfrm states twice.
    
    Signed-off-by: Herbert Xu <[EMAIL PROTECTED]>
    Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
 include/net/xfrm.h      |   11 +--
 net/ipv4/xfrm4_policy.c |  134 +++++++----------------------------
 net/ipv6/xfrm6_policy.c |  136 ++++++-----------------------------
 net/xfrm/xfrm_policy.c  |  183 ++++++++++++++++++++++++++++++++++++++++------
 4 files changed, 211 insertions(+), 253 deletions(-)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index d427343..c9345fe 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -227,6 +227,7 @@ struct km_event
        u32     event;
 };
 
+struct net_device;
 struct xfrm_type;
 struct xfrm_dst;
 struct xfrm_policy_afinfo {
@@ -237,13 +238,11 @@ struct xfrm_policy_afinfo {
                                               xfrm_address_t *daddr);
        int                     (*get_saddr)(xfrm_address_t *saddr, 
xfrm_address_t *daddr);
        struct dst_entry        *(*find_bundle)(struct flowi *fl, struct 
xfrm_policy *policy);
-       int                     (*bundle_create)(struct xfrm_policy *policy, 
-                                                struct xfrm_state **xfrm, 
-                                                int nx,
-                                                struct flowi *fl, 
-                                                struct dst_entry **dst_p);
        void                    (*decode_session)(struct sk_buff *skb,
                                                  struct flowi *fl);
+       int                     (*get_tos)(struct flowi *fl);
+       int                     (*fill_dst)(struct xfrm_dst *xdst,
+                                           struct net_device *dev);
 };
 
 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
@@ -1094,7 +1093,6 @@ static inline int xfrm4_udp_encap_rcv(struct sock *sk, 
struct sk_buff *skb)
 }
 #endif
 
-extern struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos);
 struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
 extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, 
int, void*), void *);
 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
@@ -1113,7 +1111,6 @@ extern int xfrm_policy_flush(u8 type, struct xfrm_audit 
*audit_info);
 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy 
*pol);
 extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst,
                          struct flowi *fl, int family, int strict);
-extern void xfrm_init_pmtu(struct dst_entry *dst);
 
 #ifdef CONFIG_XFRM_MIGRATE
 extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index cebc847..1d75243 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -79,122 +79,39 @@ __xfrm4_find_bundle(struct flowi *fl, struct xfrm_policy 
*policy)
        return dst;
 }
 
-/* Allocate chain of dst_entry's, attach known xfrm's, calculate
- * all the metrics... Shortly, bundle a bundle.
- */
-
-static int
-__xfrm4_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, 
int nx,
-                     struct flowi *fl, struct dst_entry **dst_p)
+static int xfrm4_get_tos(struct flowi *fl)
 {
-       struct dst_entry *dst, *dst_prev;
-       struct rtable *rt0 = (struct rtable*)(*dst_p);
-       struct rtable *rt = rt0;
-       int tos = fl->fl4_tos;
-       int i;
-       int err;
-       int header_len = 0;
-       int trailer_len = 0;
-
-       dst = dst_prev = NULL;
-       dst_hold(&rt->u.dst);
-
-       for (i = 0; i < nx; i++) {
-               struct dst_entry *dst1 = dst_alloc(&xfrm4_dst_ops);
-               struct xfrm_dst *xdst;
-
-               if (unlikely(dst1 == NULL)) {
-                       err = -ENOBUFS;
-                       dst_release(&rt->u.dst);
-                       goto error;
-               }
+       return fl->fl4_tos;
+}
 
-               if (!dst)
-                       dst = dst1;
-               else {
-                       dst_prev->child = dst1;
-                       dst1->flags |= DST_NOHASH;
-                       dst_clone(dst1);
-               }
+static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev)
+{
+       struct rtable *rt = (struct rtable *)xdst->route;
 
-               xdst = (struct xfrm_dst *)dst1;
-               xdst->route = &rt->u.dst;
-               xdst->genid = xfrm[i]->genid;
+       xdst->u.rt.fl = rt->fl;
 
-               dst1->next = dst_prev;
-               dst_prev = dst1;
+       xdst->u.dst.dev = dev;
+       dev_hold(dev);
 
-               header_len += xfrm[i]->props.header_len;
-               trailer_len += xfrm[i]->props.trailer_len;
+       xdst->u.rt.idev = in_dev_get(dev);
+       if (!xdst->u.rt.idev)
+               return -ENODEV;
 
-               if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
-                       dst1 = xfrm_dst_lookup(xfrm[i], tos);
-                       err = PTR_ERR(dst1);
-                       if (IS_ERR(dst1))
-                               goto error;
+       xdst->u.rt.peer = rt->peer;
+       if (rt->peer)
+               atomic_inc(&rt->peer->refcnt);
 
-                       rt = (struct rtable *)dst1;
-               } else
-                       dst_hold(&rt->u.dst);
-       }
+       /* Sheit... I remember I did this right. Apparently,
+        * it was magically lost, so this code needs audit */
+       xdst->u.rt.rt_flags = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST |
+                                             RTCF_LOCAL);
+       xdst->u.rt.rt_type = rt->rt_type;
+       xdst->u.rt.rt_src = rt->rt_src;
+       xdst->u.rt.rt_dst = rt->rt_dst;
+       xdst->u.rt.rt_gateway = rt->rt_gateway;
+       xdst->u.rt.rt_spec_dst = rt->rt_spec_dst;
 
-       dst_prev->child = &rt->u.dst;
-       dst->path = &rt->u.dst;
-
-       /* Copy neighbout for reachability confirmation */
-       dst->neighbour = neigh_clone(rt->u.dst.neighbour);
-
-       *dst_p = dst;
-       dst = dst_prev;
-
-       dst_prev = *dst_p;
-       i = 0;
-       err = -ENODEV;
-       for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
-               struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
-               x->u.rt.fl = *fl;
-
-               dst_prev->xfrm = xfrm[i++];
-               dst_prev->dev = rt->u.dst.dev;
-               if (!rt->u.dst.dev)
-                       goto error;
-               dev_hold(rt->u.dst.dev);
-
-               x->u.rt.idev = in_dev_get(rt->u.dst.dev);
-               if (!x->u.rt.idev)
-                       goto error;
-
-               dst_prev->obsolete      = -1;
-               dst_prev->flags        |= DST_HOST;
-               dst_prev->lastuse       = jiffies;
-               dst_prev->header_len    = header_len;
-               dst_prev->trailer_len   = trailer_len;
-               memcpy(&dst_prev->metrics, &x->route->metrics, 
sizeof(dst_prev->metrics));
-
-               dst_prev->input = dst_discard;
-               dst_prev->output = dst_prev->xfrm->outer_mode->afinfo->output;
-               if (rt0->peer)
-                       atomic_inc(&rt0->peer->refcnt);
-               x->u.rt.peer = rt0->peer;
-               /* Sheit... I remember I did this right. Apparently,
-                * it was magically lost, so this code needs audit */
-               x->u.rt.rt_flags = 
rt0->rt_flags&(RTCF_BROADCAST|RTCF_MULTICAST|RTCF_LOCAL);
-               x->u.rt.rt_type = rt0->rt_type;
-               x->u.rt.rt_src = rt0->rt_src;
-               x->u.rt.rt_dst = rt0->rt_dst;
-               x->u.rt.rt_gateway = rt0->rt_gateway;
-               x->u.rt.rt_spec_dst = rt0->rt_spec_dst;
-               header_len -= x->u.dst.xfrm->props.header_len;
-               trailer_len -= x->u.dst.xfrm->props.trailer_len;
-       }
-
-       xfrm_init_pmtu(dst);
        return 0;
-
-error:
-       if (dst)
-               dst_free(dst);
-       return err;
 }
 
 static void
@@ -330,8 +247,9 @@ static struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
        .dst_lookup =           xfrm4_dst_lookup,
        .get_saddr =            xfrm4_get_saddr,
        .find_bundle =          __xfrm4_find_bundle,
-       .bundle_create =        __xfrm4_bundle_create,
        .decode_session =       _decode_session4,
+       .get_tos =              xfrm4_get_tos,
+       .fill_dst =             xfrm4_fill_dst,
 };
 
 static void __init xfrm4_policy_init(void)
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 8e78530..63932c5 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -93,126 +93,33 @@ __xfrm6_find_bundle(struct flowi *fl, struct xfrm_policy 
*policy)
        return dst;
 }
 
-/* Allocate chain of dst_entry's, attach known xfrm's, calculate
- * all the metrics... Shortly, bundle a bundle.
- */
-
-static int
-__xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, 
int nx,
-                     struct flowi *fl, struct dst_entry **dst_p)
+static int xfrm6_get_tos(struct flowi *fl)
 {
-       struct dst_entry *dst, *dst_prev;
-       struct rt6_info *rt0 = (struct rt6_info*)(*dst_p);
-       struct rt6_info *rt  = rt0;
-       int i;
-       int err;
-       int header_len = 0;
-       int trailer_len = 0;
-
-       dst = dst_prev = NULL;
-       dst_hold(&rt->u.dst);
-
-       for (i = 0; i < nx; i++) {
-               struct dst_entry *dst1 = dst_alloc(&xfrm6_dst_ops);
-               struct xfrm_dst *xdst;
+       return 0;
+}
 
-               if (unlikely(dst1 == NULL)) {
-                       err = -ENOBUFS;
-                       dst_release(&rt->u.dst);
-                       goto error;
-               }
+static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev)
+{
+       struct rt6_info *rt = (struct rt6_info*)xdst->route;
 
-               if (!dst)
-                       dst = dst1;
-               else {
-                       dst_prev->child = dst1;
-                       dst1->flags |= DST_NOHASH;
-                       dst_clone(dst1);
-               }
+       xdst->u.dst.dev = dev;
+       dev_hold(dev);
 
-               xdst = (struct xfrm_dst *)dst1;
-               xdst->route = &rt->u.dst;
-               xdst->genid = xfrm[i]->genid;
-               if (rt->rt6i_node)
-                       xdst->route_cookie = rt->rt6i_node->fn_sernum;
-
-               dst1->next = dst_prev;
-               dst_prev = dst1;
-
-               if (xfrm[i]->type->flags & XFRM_TYPE_NON_FRAGMENT)
-                       ((struct rt6_info *)dst)->nfheader_len +=
-                               xfrm[i]->props.header_len;
-               header_len += xfrm[i]->props.header_len;
-               trailer_len += xfrm[i]->props.trailer_len;
-
-               if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
-                       dst1 = xfrm_dst_lookup(xfrm[i], 0);
-                       err = PTR_ERR(dst1);
-                       if (IS_ERR(dst1))
-                               goto error;
-
-                       rt = (struct rt6_info *)dst1;
-               } else
-                       dst_hold(&rt->u.dst);
-       }
+       xdst->u.rt6.rt6i_idev = in6_dev_get(rt->u.dst.dev);
+       if (!xdst->u.rt6.rt6i_idev)
+               return -ENODEV;
 
-       dst_prev->child = &rt->u.dst;
-       dst->path = &rt->u.dst;
-
-       /* Copy neighbour for reachability confirmation */
-       dst->neighbour = neigh_clone(rt->u.dst.neighbour);
-
-       if (rt->rt6i_node)
-               ((struct xfrm_dst *)dst)->path_cookie = 
rt->rt6i_node->fn_sernum;
-
-       *dst_p = dst;
-       dst = dst_prev;
-
-       dst_prev = *dst_p;
-       i = 0;
-       err = -ENODEV;
-       for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
-               struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
-
-               dst_prev->xfrm = xfrm[i++];
-               dst_prev->dev = rt->u.dst.dev;
-               if (!rt->u.dst.dev)
-                       goto error;
-               dev_hold(rt->u.dst.dev);
-
-               x->u.rt6.rt6i_idev = in6_dev_get(rt->u.dst.dev);
-               if (!x->u.rt6.rt6i_idev)
-                       goto error;
-
-               dst_prev->obsolete      = -1;
-               dst_prev->flags        |= DST_HOST;
-               dst_prev->lastuse       = jiffies;
-               dst_prev->header_len    = header_len;
-               dst_prev->trailer_len   = trailer_len;
-               memcpy(&dst_prev->metrics, &x->route->metrics, 
sizeof(dst_prev->metrics));
-
-               dst_prev->input = dst_discard;
-               dst_prev->output = dst_prev->xfrm->outer_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&(RTF_ANYCAST|RTF_LOCAL);
-               x->u.rt6.rt6i_metric   = rt0->rt6i_metric;
-               x->u.rt6.rt6i_node     = rt0->rt6i_node;
-               x->u.rt6.rt6i_gateway  = rt0->rt6i_gateway;
-               memcpy(&x->u.rt6.rt6i_gateway, &rt0->rt6i_gateway, 
sizeof(x->u.rt6.rt6i_gateway));
-               x->u.rt6.rt6i_dst      = rt0->rt6i_dst;
-               x->u.rt6.rt6i_src      = rt0->rt6i_src;
-               header_len -= x->u.dst.xfrm->props.header_len;
-               trailer_len -= x->u.dst.xfrm->props.trailer_len;
-       }
+       /* Sheit... I remember I did this right. Apparently,
+        * it was magically lost, so this code needs audit */
+       xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
+                                                  RTF_LOCAL);
+       xdst->u.rt6.rt6i_metric = rt->rt6i_metric;
+       xdst->u.rt6.rt6i_node = rt->rt6i_node;
+       xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
+       xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
+       xdst->u.rt6.rt6i_src = rt->rt6i_src;
 
-       xfrm_init_pmtu(dst);
        return 0;
-
-error:
-       if (dst)
-               dst_free(dst);
-       return err;
 }
 
 static inline void
@@ -355,8 +262,9 @@ static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
        .dst_lookup =           xfrm6_dst_lookup,
        .get_saddr =            xfrm6_get_saddr,
        .find_bundle =          __xfrm6_find_bundle,
-       .bundle_create =        __xfrm6_bundle_create,
        .decode_session =       _decode_session6,
+       .get_tos =              xfrm6_get_tos,
+       .fill_dst =             xfrm6_fill_dst,
 };
 
 static void __init xfrm6_policy_init(void)
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 085c19d..b153f74 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -24,6 +24,7 @@
 #include <linux/netfilter.h>
 #include <linux/module.h>
 #include <linux/cache.h>
+#include <net/dst.h>
 #include <net/xfrm.h>
 #include <net/ip.h>
 
@@ -50,6 +51,7 @@ static DEFINE_SPINLOCK(xfrm_policy_gc_lock);
 
 static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short 
family);
 static void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo);
+static void xfrm_init_pmtu(struct dst_entry *dst);
 
 static inline int
 __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl)
@@ -85,7 +87,8 @@ int xfrm_selector_match(struct xfrm_selector *sel, struct 
flowi *fl,
        return 0;
 }
 
-struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos)
+static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
+                                               int family)
 {
        xfrm_address_t *saddr = &x->props.saddr;
        xfrm_address_t *daddr = &x->id.daddr;
@@ -97,7 +100,7 @@ struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int 
tos)
        if (x->type->flags & XFRM_TYPE_REMOTE_COADDR)
                daddr = x->coaddr;
 
-       afinfo = xfrm_policy_get_afinfo(x->props.family);
+       afinfo = xfrm_policy_get_afinfo(family);
        if (unlikely(afinfo == NULL))
                return ERR_PTR(-EAFNOSUPPORT);
 
@@ -105,7 +108,6 @@ struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int 
tos)
        xfrm_policy_put_afinfo(afinfo);
        return dst;
 }
-EXPORT_SYMBOL(xfrm_dst_lookup);
 
 static inline unsigned long make_jiffies(long secs)
 {
@@ -1234,24 +1236,164 @@ xfrm_find_bundle(struct flowi *fl, struct xfrm_policy 
*policy, unsigned short fa
        return x;
 }
 
-/* Allocate chain of dst_entry's, attach known xfrm's, calculate
- * all the metrics... Shortly, bundle a bundle.
- */
+static inline int xfrm_get_tos(struct flowi *fl, int family)
+{
+       struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
+       int tos;
 
-static int
-xfrm_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int 
nx,
-                  struct flowi *fl, struct dst_entry **dst_p,
-                  unsigned short family)
+       if (!afinfo)
+               return -EINVAL;
+
+       tos = afinfo->get_tos(fl);
+
+       xfrm_policy_put_afinfo(afinfo);
+
+       return tos;
+}
+
+static inline struct xfrm_dst *xfrm_alloc_dst(int family)
 {
-       int err;
        struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
-       if (unlikely(afinfo == NULL))
+       struct xfrm_dst *xdst;
+
+       if (!afinfo)
+               return ERR_PTR(-EINVAL);
+
+       xdst = dst_alloc(afinfo->dst_ops) ?: ERR_PTR(-ENOBUFS);
+
+       xfrm_policy_put_afinfo(afinfo);
+
+       return xdst;
+}
+
+static inline int xfrm_fill_dst(struct xfrm_dst *xdst, struct net_device *dev)
+{
+       struct xfrm_policy_afinfo *afinfo =
+               xfrm_policy_get_afinfo(xdst->u.dst.ops->family);
+       int err;
+
+       if (!afinfo)
                return -EINVAL;
-       err = afinfo->bundle_create(policy, xfrm, nx, fl, dst_p);
+
+       err = afinfo->fill_dst(xdst, dev);
+
        xfrm_policy_put_afinfo(afinfo);
+
        return err;
 }
 
+/* Allocate chain of dst_entry's, attach known xfrm's, calculate
+ * all the metrics... Shortly, bundle a bundle.
+ */
+
+static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
+                                           struct xfrm_state **xfrm, int nx,
+                                           struct flowi *fl,
+                                           struct dst_entry *dst)
+{
+       unsigned long now = jiffies;
+       struct net_device *dev;
+       struct dst_entry *dst_prev = NULL;
+       struct dst_entry *dst0 = NULL;
+       int i = 0;
+       int err;
+       int header_len = 0;
+       int trailer_len = 0;
+       int tos;
+       int family = policy->selector.family;
+
+       tos = xfrm_get_tos(fl, family);
+       err = tos;
+       if (tos < 0)
+               goto put_states;
+
+       dst_hold(dst);
+
+       for (; i < nx; i++) {
+               struct xfrm_dst *xdst = xfrm_alloc_dst(family);
+               struct dst_entry *dst1 = &xdst->u.dst;
+
+               err = PTR_ERR(xdst);
+               if (IS_ERR(xdst)) {
+                       dst_release(dst);
+                       goto put_states;
+               }
+
+               if (!dst_prev)
+                       dst0 = dst1;
+               else {
+                       dst_prev->child = dst_clone(dst1);
+                       dst1->flags |= DST_NOHASH;
+               }
+
+               xdst->route = dst;
+               memcpy(&dst1->metrics, &dst->metrics, sizeof(dst->metrics));
+
+               if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
+                       family = xfrm[i]->props.family;
+                       dst = xfrm_dst_lookup(xfrm[i], tos, family);
+                       err = PTR_ERR(dst);
+                       if (IS_ERR(dst))
+                               goto put_states;
+               } else
+                       dst_hold(dst);
+
+               dst1->xfrm = xfrm[i];
+               xdst->genid = xfrm[i]->genid;
+
+               dst1->obsolete = -1;
+               dst1->flags |= DST_HOST;
+               dst1->lastuse = now;
+
+               dst1->input = dst_discard;
+               dst1->output = xfrm[i]->outer_mode->afinfo->output;
+
+               dst1->next = dst_prev;
+               dst_prev = dst1;
+
+               header_len += xfrm[i]->props.header_len;
+               trailer_len += xfrm[i]->props.trailer_len;
+       }
+
+       dst_prev->child = dst;
+       dst0->path = dst;
+
+       err = -ENODEV;
+       dev = dst->dev;
+       if (!dev)
+               goto free_dst;
+
+       /* Copy neighbout for reachability confirmation */
+       dst0->neighbour = neigh_clone(dst->neighbour);
+
+       xfrm_init_pmtu(dst_prev);
+
+       for (dst_prev = dst0; dst_prev != dst; dst_prev = dst_prev->child) {
+               struct xfrm_dst *xdst = (struct xfrm_dst *)dst_prev;
+
+               err = xfrm_fill_dst(xdst, dev);
+               if (err)
+                       goto free_dst;
+
+               dst_prev->header_len = header_len;
+               dst_prev->trailer_len = trailer_len;
+               header_len -= xdst->u.dst.xfrm->props.header_len;
+               trailer_len -= xdst->u.dst.xfrm->props.trailer_len;
+       }
+
+out:
+       return dst0;
+
+put_states:
+       for (; i < nx; i++)
+               xfrm_state_put(xfrm[i]);
+free_dst:
+       if (dst0)
+               dst_free(dst0);
+       dst0 = ERR_PTR(err);
+       goto out;
+}
+
 static int inline
 xfrm_dst_alloc_copy(void **target, void *src, int size)
 {
@@ -1454,15 +1596,10 @@ restart:
                        return 0;
                }
 
-               dst = dst_orig;
-               err = xfrm_bundle_create(policy, xfrm, nx, fl, &dst, family);
-
-               if (unlikely(err)) {
-                       int i;
-                       for (i=0; i<nx; i++)
-                               xfrm_state_put(xfrm[i]);
+               dst = xfrm_bundle_create(policy, xfrm, nx, fl, dst_orig);
+               err = PTR_ERR(dst);
+               if (IS_ERR(dst))
                        goto error;
-               }
 
                for (pi = 0; pi < npols; pi++) {
                        read_lock_bh(&pols[pi]->lock);
@@ -1886,7 +2023,7 @@ static int xfrm_flush_bundles(void)
        return 0;
 }
 
-void xfrm_init_pmtu(struct dst_entry *dst)
+static void xfrm_init_pmtu(struct dst_entry *dst)
 {
        do {
                struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
@@ -1907,8 +2044,6 @@ void xfrm_init_pmtu(struct dst_entry *dst)
        } while ((dst = dst->next));
 }
 
-EXPORT_SYMBOL(xfrm_init_pmtu);
-
 /* Check that the bundle accepts the flow and its components are
  * still valid.
  */
-
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