[NETNS][IPV6] rt6_info - make rt6_info accessed as a pointer
This patch make mindless changes and prepares the code to use dynamic
allocation for rt6_info structure. The code accesses the rt6_info
structure as a pointer instead of a global static variable.
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index b3ac490..8f954c1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -127,7 +127,7 @@
.entries = ATOMIC_INIT(0),
};
-struct rt6_info ip6_null_entry = {
+static struct rt6_info ip6_null_entry_template = {
.u = {
.dst = {
.__refcnt = ATOMIC_INIT(1),
@@ -138,7 +138,6 @@
.input = ip6_pkt_discard,
.output = ip6_pkt_discard_out,
.ops = &ip6_dst_ops,
- .path = (struct dst_entry*)&ip6_null_entry,
}
},
.rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
@@ -146,12 +145,14 @@
.rt6i_ref = ATOMIC_INIT(1),
};
+struct rt6_info *ip6_null_entry;
+
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
static int ip6_pkt_prohibit(struct sk_buff *skb);
static int ip6_pkt_prohibit_out(struct sk_buff *skb);
-struct rt6_info ip6_prohibit_entry = {
+struct rt6_info ip6_prohibit_entry_template = {
.u = {
.dst = {
.__refcnt = ATOMIC_INIT(1),
@@ -162,7 +163,6 @@
.input = ip6_pkt_prohibit,
.output = ip6_pkt_prohibit_out,
.ops = &ip6_dst_ops,
- .path = (struct dst_entry*)&ip6_prohibit_entry,
}
},
.rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
@@ -170,7 +170,9 @@
.rt6i_ref = ATOMIC_INIT(1),
};
-struct rt6_info ip6_blk_hole_entry = {
+struct rt6_info *ip6_prohibit_entry;
+
+static struct rt6_info ip6_blk_hole_entry_template = {
.u = {
.dst = {
.__refcnt = ATOMIC_INIT(1),
@@ -181,7 +183,6 @@
.input = dst_discard,
.output = dst_discard,
.ops = &ip6_dst_ops,
- .path = (struct dst_entry*)&ip6_blk_hole_entry,
}
},
.rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
@@ -189,6 +190,8 @@
.rt6i_ref = ATOMIC_INIT(1),
};
+struct rt6_info *ip6_blk_hole_entry;
+
#endif
/* allocate dst with ip6_dst_ops */
@@ -271,7 +274,7 @@
return local;
if (strict)
- return &ip6_null_entry;
+ return ip6_null_entry;
}
return rt;
}
@@ -437,7 +440,7 @@
RT6_TRACE("%s() => %p\n",
__FUNCTION__, match);
- return (match ? match : &ip6_null_entry);
+ return (match ? match : ip6_null_entry);
}
#ifdef CONFIG_IPV6_ROUTE_INFO
@@ -522,7 +525,7 @@
#define BACKTRACK(saddr) \
do { \
- if (rt == &ip6_null_entry) { \
+ if (rt == ip6_null_entry) { \
struct fib6_node *pn; \
while (1) { \
if (fn->fn_flags & RTN_TL_ROOT) \
@@ -686,7 +689,7 @@
restart:
rt = rt6_select(fn, oif, strict | reachable);
BACKTRACK(&fl->fl6_src);
- if (rt == &ip6_null_entry ||
+ if (rt == ip6_null_entry ||
rt->rt6i_flags & RTF_CACHE)
goto out;
@@ -704,7 +707,7 @@
}
dst_release(&rt->u.dst);
- rt = nrt ? : &ip6_null_entry;
+ rt = nrt ? : ip6_null_entry;
dst_hold(&rt->u.dst);
if (nrt) {
@@ -1257,7 +1260,7 @@
int err;
struct fib6_table *table;
- if (rt == &ip6_null_entry)
+ if (rt == ip6_null_entry)
return -ENOENT;
table = rt->rt6i_table;
@@ -1369,7 +1372,7 @@
}
if (!rt)
- rt = &ip6_null_entry;
+ rt = ip6_null_entry;
BACKTRACK(&fl->fl6_src);
out:
dst_hold(&rt->u.dst);
@@ -1415,7 +1418,7 @@
rt = ip6_route_redirect(dest, src, saddr, neigh->dev);
- if (rt == &ip6_null_entry) {
+ if (rt == ip6_null_entry) {
if (net_ratelimit())
printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop "
"for redirect target\n");
@@ -1886,7 +1889,7 @@
static int fib6_ifdown(struct rt6_info *rt, void *arg)
{
if (((void*)rt->rt6i_dev == arg || arg == NULL) &&
- rt != &ip6_null_entry) {
+ rt != ip6_null_entry) {
RT6_TRACE("deleted by ifdown %p\n", rt);
return -1;
}
@@ -2565,9 +2568,30 @@
ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops.kmem_cachep;
+ ret = -ENOMEM;
+ ip6_null_entry = kmemdup(&ip6_null_entry_template,
+ sizeof(*ip6_null_entry), GFP_KERNEL);
+ if (!ip6_null_entry)
+ goto out_kmem_cache;
+ ip6_null_entry->u.dst.path = (struct dst_entry *)ip6_null_entry;
+
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template,
+ sizeof(*ip6_prohibit_entry), GFP_KERNEL);
+ if (!ip6_prohibit_entry)
+ goto out_ip6_null_entry;
+ ip6_prohibit_entry->u.dst.path = (struct dst_entry *)ip6_prohibit_entry;
+
+ ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template,
+ sizeof(*ip6_blk_hole_entry), GFP_KERNEL);
+ if (!ip6_blk_hole_entry)
+ goto out_ip6_prohibit_entry;
+ ip6_blk_hole_entry->u.dst.path = (struct dst_entry *)ip6_blk_hole_entry;
+#endif
+
ret = fib6_init();
if (ret)
- goto out_kmem_cache;
+ goto out_ip6_blk_hole_entry;
ret = xfrm6_init();
if (ret)
@@ -2595,6 +2619,14 @@
xfrm6_fini();
out_fib6_init:
fib6_gc_cleanup();
+out_ip6_blk_hole_entry:
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ kfree(ip6_blk_hole_entry);
+out_ip6_prohibit_entry:
+ kfree(ip6_prohibit_entry);
+out_ip6_null_entry:
+#endif
+ kfree(ip6_null_entry);
out_kmem_cache:
kmem_cache_destroy(ip6_dst_ops.kmem_cachep);
goto out;
@@ -2607,4 +2639,10 @@
xfrm6_fini();
fib6_gc_cleanup();
kmem_cache_destroy(ip6_dst_ops.kmem_cachep);
+
+ kfree(ip6_null_entry);
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ kfree(ip6_prohibit_entry);
+ kfree(ip6_blk_hole_entry);
+#endif
}
