1 files changed, 103 insertions, 53 deletions

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 9fc4c315f6cd..ab4d0e598a2c 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -46,6 +46,7 @@ EXPORT_SYMBOL(xfrm_cfg_mutex);
 
 static DEFINE_RWLOCK(xfrm_policy_lock);
 
+static struct list_head xfrm_policy_bytype[XFRM_POLICY_TYPE_MAX];
 unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
 EXPORT_SYMBOL(xfrm_policy_count);
 
@@ -96,25 +97,52 @@ int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
         return 0;
 }
 
+static inline struct dst_entry *__xfrm_dst_lookup(int tos,
+                                                  xfrm_address_t *saddr,
+                                                  xfrm_address_t *daddr,
+                                                  int family)
+{
+        struct xfrm_policy_afinfo *afinfo;
+        struct dst_entry *dst;
+
+        afinfo = xfrm_policy_get_afinfo(family);
+        if (unlikely(afinfo == NULL))
+                return ERR_PTR(-EAFNOSUPPORT);
+
+        dst = afinfo->dst_lookup(tos, saddr, daddr);
+
+        xfrm_policy_put_afinfo(afinfo);
+
+        return dst;
+}
+
 static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
+                                                xfrm_address_t *prev_saddr,
+                                                xfrm_address_t *prev_daddr,
                                                 int family)
 {
         xfrm_address_t *saddr = &x->props.saddr;
         xfrm_address_t *daddr = &x->id.daddr;
-        struct xfrm_policy_afinfo *afinfo;
         struct dst_entry *dst;
 
-        if (x->type->flags & XFRM_TYPE_LOCAL_COADDR)
+        if (x->type->flags & XFRM_TYPE_LOCAL_COADDR) {
                 saddr = x->coaddr;
-        if (x->type->flags & XFRM_TYPE_REMOTE_COADDR)
+                daddr = prev_daddr;
+        }
+        if (x->type->flags & XFRM_TYPE_REMOTE_COADDR) {
+                saddr = prev_saddr;
                 daddr = x->coaddr;
+        }
 
-        afinfo = xfrm_policy_get_afinfo(family);
-        if (unlikely(afinfo == NULL))
-                return ERR_PTR(-EAFNOSUPPORT);
+        dst = __xfrm_dst_lookup(tos, saddr, daddr, family);
+
+        if (!IS_ERR(dst)) {
+                if (prev_saddr != saddr)
+                        memcpy(prev_saddr, saddr,  sizeof(*prev_saddr));
+                if (prev_daddr != daddr)
+                        memcpy(prev_daddr, daddr,  sizeof(*prev_daddr));
+        }
 
-        dst = afinfo->dst_lookup(tos, saddr, daddr);
-        xfrm_policy_put_afinfo(afinfo);
         return dst;
 }
 
@@ -208,6 +236,7 @@ struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp)
         policy = kzalloc(sizeof(struct xfrm_policy), gfp);
 
         if (policy) {
+                INIT_LIST_HEAD(&policy->bytype);
                 INIT_HLIST_NODE(&policy->bydst);
                 INIT_HLIST_NODE(&policy->byidx);
                 rwlock_init(&policy->lock);
@@ -230,7 +259,11 @@ void xfrm_policy_destroy(struct xfrm_policy *policy)
         if (del_timer(&policy->timer))
                 BUG();
 
-        security_xfrm_policy_free(policy);
+        write_lock_bh(&xfrm_policy_lock);
+        list_del(&policy->bytype);
+        write_unlock_bh(&xfrm_policy_lock);
+
+        security_xfrm_policy_free(policy->security);
         kfree(policy);
 }
 EXPORT_SYMBOL(xfrm_policy_destroy);
@@ -584,6 +617,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
         policy->curlft.use_time = 0;
         if (!mod_timer(&policy->timer, jiffies + HZ))
                 xfrm_pol_hold(policy);
+        list_add_tail(&policy->bytype, &xfrm_policy_bytype[policy->type]);
         write_unlock_bh(&xfrm_policy_lock);
 
         if (delpol)
@@ -642,7 +676,8 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
                     xfrm_sec_ctx_match(ctx, pol->security)) {
                         xfrm_pol_hold(pol);
                         if (delete) {
-                                *err = security_xfrm_policy_delete(pol);
+                                *err = security_xfrm_policy_delete(
+                                                                pol->security);
                                 if (*err) {
                                         write_unlock_bh(&xfrm_policy_lock);
                                         return pol;
@@ -684,7 +719,8 @@ struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete,
                 if (pol->type == type && pol->index == id) {
                         xfrm_pol_hold(pol);
                         if (delete) {
-                                *err = security_xfrm_policy_delete(pol);
+                                *err = security_xfrm_policy_delete(
+                                                                pol->security);
                                 if (*err) {
                                         write_unlock_bh(&xfrm_policy_lock);
                                         return pol;
@@ -722,7 +758,7 @@ xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
                                      &xfrm_policy_inexact[dir], bydst) {
                         if (pol->type != type)
                                 continue;
-                        err = security_xfrm_policy_delete(pol);
+                        err = security_xfrm_policy_delete(pol->security);
                         if (err) {
                                 xfrm_audit_policy_delete(pol, 0,
                                                          audit_info->loginuid,
@@ -736,7 +772,8 @@ xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
                                              bydst) {
                                 if (pol->type != type)
                                         continue;
-                                err = security_xfrm_policy_delete(pol);
+                                err = security_xfrm_policy_delete(
+                                                                pol->security);
                                 if (err) {
                                         xfrm_audit_policy_delete(pol, 0,
                                                         audit_info->loginuid,
@@ -822,57 +859,60 @@ out:
 }
 EXPORT_SYMBOL(xfrm_policy_flush);
 
-int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*),
+int xfrm_policy_walk(struct xfrm_policy_walk *walk,
+                     int (*func)(struct xfrm_policy *, int, int, void*),
                      void *data)
 {
-        struct xfrm_policy *pol, *last = NULL;
-        struct hlist_node *entry;
-        int dir, last_dir = 0, count, error;
+        struct xfrm_policy *old, *pol, *last = NULL;
+        int error = 0;
 
+        if (walk->type >= XFRM_POLICY_TYPE_MAX &&
+            walk->type != XFRM_POLICY_TYPE_ANY)
+                return -EINVAL;
+
+        if (walk->policy == NULL && walk->count != 0)
+                return 0;
+
+        old = pol = walk->policy;
+        walk->policy = NULL;
         read_lock_bh(&xfrm_policy_lock);
-        count = 0;
 
-        for (dir = 0; dir < 2*XFRM_POLICY_MAX; dir++) {
-                struct hlist_head *table = xfrm_policy_bydst[dir].table;
-                int i;
+        for (; walk->cur_type < XFRM_POLICY_TYPE_MAX; walk->cur_type++) {
+                if (walk->type != walk->cur_type &&
+                    walk->type != XFRM_POLICY_TYPE_ANY)
+                        continue;
 
-                hlist_for_each_entry(pol, entry,
-                                     &xfrm_policy_inexact[dir], bydst) {
-                        if (pol->type != type)
+                if (pol == NULL) {
+                        pol = list_first_entry(&xfrm_policy_bytype[walk->cur_type],
+                                               struct xfrm_policy, bytype);
+                }
+                list_for_each_entry_from(pol, &xfrm_policy_bytype[walk->cur_type], bytype) {
+                        if (pol->dead)
                                 continue;
                         if (last) {
-                                error = func(last, last_dir % XFRM_POLICY_MAX,
-                                             count, data);
-                                if (error)
+                                error = func(last, xfrm_policy_id2dir(last->index),
+                                             walk->count, data);
+                                if (error) {
+                                        xfrm_pol_hold(last);
+                                        walk->policy = last;
                                         goto out;
-                        }
-                        last = pol;
-                        last_dir = dir;
-                        count++;
-                }
-                for (i = xfrm_policy_bydst[dir].hmask; i >= 0; i--) {
-                        hlist_for_each_entry(pol, entry, table + i, bydst) {
-                                if (pol->type != type)
-                                        continue;
-                                if (last) {
-                                        error = func(last, last_dir % XFRM_POLICY_MAX,
-                                                     count, data);
-                                        if (error)
-                                                goto out;
                                 }
-                                last = pol;
-                                last_dir = dir;
-                                count++;
                         }
+                        last = pol;
+                        walk->count++;
                 }
+                pol = NULL;
         }
-        if (count == 0) {
+        if (walk->count == 0) {
                 error = -ENOENT;
                 goto out;
         }
-        error = func(last, last_dir % XFRM_POLICY_MAX, 0, data);
+        if (last)
+                error = func(last, xfrm_policy_id2dir(last->index), 0, data);
 out:
         read_unlock_bh(&xfrm_policy_lock);
+        if (old != NULL)
+                xfrm_pol_put(old);
         return error;
 }
 EXPORT_SYMBOL(xfrm_policy_walk);
@@ -894,7 +934,8 @@ static int xfrm_policy_match(struct xfrm_policy *pol, struct flowi *fl,
 
         match = xfrm_selector_match(sel, fl, family);
         if (match)
-                ret = security_xfrm_policy_lookup(pol, fl->secid, dir);
+                ret = security_xfrm_policy_lookup(pol->security, fl->secid,
+                                                  dir);
 
         return ret;
 }
@@ -1011,8 +1052,9 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struc
                 int err = 0;
 
                 if (match) {
-                        err = security_xfrm_policy_lookup(pol, fl->secid,
-                                        policy_to_flow_dir(dir));
+                        err = security_xfrm_policy_lookup(pol->security,
+                                                      fl->secid,
+                                                      policy_to_flow_dir(dir));
                         if (!err)
                                 xfrm_pol_hold(pol);
                         else if (err == -ESRCH)
@@ -1101,7 +1143,8 @@ static struct xfrm_policy *clone_policy(struct xfrm_policy *old, int dir)
 
         if (newp) {
                 newp->selector = old->selector;
-                if (security_xfrm_policy_clone(old, newp)) {
+                if (security_xfrm_policy_clone(old->security,
+                                               &newp->security)) {
                         kfree(newp);
                         return NULL;  /* ENOMEM */
                 }
@@ -1344,6 +1387,9 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
         int trailer_len = 0;
         int tos;
         int family = policy->selector.family;
+        xfrm_address_t saddr, daddr;
+
+        xfrm_flowi_addr_get(fl, &saddr, &daddr, family);
 
         tos = xfrm_get_tos(fl, family);
         err = tos;
@@ -1374,7 +1420,8 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 
                 if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
                         family = xfrm[i]->props.family;
-                        dst = xfrm_dst_lookup(xfrm[i], tos, family);
+                        dst = xfrm_dst_lookup(xfrm[i], tos, &saddr, &daddr,
+                                              family);
                         err = PTR_ERR(dst);
                         if (IS_ERR(dst))
                                 goto put_states;
@@ -2038,7 +2085,7 @@ static int stale_bundle(struct dst_entry *dst)
 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
 {
         while ((dst = dst->child) && dst->xfrm && dst->dev == dev) {
-                dst->dev = dev->nd_net->loopback_dev;
+                dst->dev = dev_net(dev)->loopback_dev;
                 dev_hold(dst->dev);
                 dev_put(dev);
         }
@@ -2309,7 +2356,7 @@ static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void
 {
         struct net_device *dev = ptr;
 
-        if (dev->nd_net != &init_net)
+        if (dev_net(dev) != &init_net)
                 return NOTIFY_DONE;
 
         switch (event) {
@@ -2365,6 +2412,9 @@ static void __init xfrm_policy_init(void)
                         panic("XFRM: failed to allocate bydst hash\n");
         }
 
+        for (dir = 0; dir < XFRM_POLICY_TYPE_MAX; dir++)
+                INIT_LIST_HEAD(&xfrm_policy_bytype[dir]);
+
         INIT_WORK(&xfrm_policy_gc_work, xfrm_policy_gc_task);
         register_netdevice_notifier(&xfrm_dev_notifier);
 }