[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/include/net/ip6_route.h b/include/net/ip6_route.h
index 2bcbfb8..e0caed2 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -34,11 +34,11 @@
#define RT6_LOOKUP_F_REACHABLE 0x2
#define RT6_LOOKUP_F_HAS_SADDR 0x4
-extern struct rt6_info ip6_null_entry;
+extern struct rt6_info *ip6_null_entry;
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-extern struct rt6_info ip6_prohibit_entry;
-extern struct rt6_info ip6_blk_hole_entry;
+extern struct rt6_info *ip6_prohibit_entry;
+extern struct rt6_info *ip6_blk_hole_entry;
#endif
extern void ip6_route_input(struct sk_buff *skb);
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index b37ae42..3192a84 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4301,13 +4301,13 @@
if (err)
goto errlo;
- ip6_null_entry.u.dst.dev = init_net.loopback_dev;
- ip6_null_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ ip6_null_entry->u.dst.dev = init_net.loopback_dev;
+ ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
- ip6_prohibit_entry.u.dst.dev = init_net.loopback_dev;
- ip6_prohibit_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
- ip6_blk_hole_entry.u.dst.dev = init_net.loopback_dev;
- ip6_blk_hole_entry.rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ ip6_prohibit_entry->u.dst.dev = init_net.loopback_dev;
+ ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ ip6_blk_hole_entry->u.dst.dev = init_net.loopback_dev;
+ ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
#endif
register_netdevice_notifier(&ipv6_dev_notf);
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 89cb092..c00055f 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -43,8 +43,8 @@
if (arg.result)
return arg.result;
- dst_hold(&ip6_null_entry.u.dst);
- return &ip6_null_entry.u.dst;
+ dst_hold(&ip6_null_entry->u.dst);
+ return &ip6_null_entry->u.dst;
}
static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
@@ -58,14 +58,14 @@
case FR_ACT_TO_TBL:
break;
case FR_ACT_UNREACHABLE:
- rt = &ip6_null_entry;
+ rt = ip6_null_entry;
goto discard_pkt;
default:
case FR_ACT_BLACKHOLE:
- rt = &ip6_blk_hole_entry;
+ rt = ip6_blk_hole_entry;
goto discard_pkt;
case FR_ACT_PROHIBIT:
- rt = &ip6_prohibit_entry;
+ rt = ip6_prohibit_entry;
goto discard_pkt;
}
@@ -73,7 +73,7 @@
if (table)
rt = lookup(table, flp, flags);
- if (rt != &ip6_null_entry) {
+ if (rt != ip6_null_entry) {
struct fib6_rule *r = (struct fib6_rule *)rule;
/*
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 1c2566e..f028f7a 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -200,7 +200,7 @@
table = kzalloc(sizeof(*table), GFP_ATOMIC);
if (table != NULL) {
table->tb6_id = id;
- table->tb6_root.leaf = &ip6_null_entry;
+ table->tb6_root.leaf = ip6_null_entry;
table->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
}
@@ -717,8 +717,8 @@
if (sfn == NULL)
goto st_failure;
- sfn->leaf = &ip6_null_entry;
- atomic_inc(&ip6_null_entry.rt6i_ref);
+ sfn->leaf = ip6_null_entry;
+ atomic_inc(&ip6_null_entry->rt6i_ref);
sfn->fn_flags = RTN_ROOT;
sfn->fn_sernum = fib6_new_sernum();
@@ -777,7 +777,7 @@
#if RT6_DEBUG >= 2
if (!pn->leaf) {
BUG_TRAP(pn->leaf != NULL);
- pn->leaf = &ip6_null_entry;
+ pn->leaf = ip6_null_entry;
}
#endif
atomic_inc(&pn->leaf->rt6i_ref);
@@ -962,7 +962,7 @@
static struct rt6_info * fib6_find_prefix(struct fib6_node *fn)
{
if (fn->fn_flags&RTN_ROOT)
- return &ip6_null_entry;
+ return ip6_null_entry;
while(fn) {
if(fn->left)
@@ -1012,7 +1012,7 @@
#if RT6_DEBUG >= 2
if (fn->leaf==NULL) {
BUG_TRAP(fn->leaf);
- fn->leaf = &ip6_null_entry;
+ fn->leaf = ip6_null_entry;
}
#endif
atomic_inc(&fn->leaf->rt6i_ref);
@@ -1154,7 +1154,7 @@
return -ENOENT;
}
#endif
- if (fn == NULL || rt == &ip6_null_entry)
+ if (fn == NULL || rt == ip6_null_entry)
return -ENOENT;
BUG_TRAP(fn->fn_flags&RTN_RTINFO);
@@ -1501,7 +1501,7 @@
goto out_fib_table_hash;
net->ipv6.fib6_main_tbl->tb6_id = RT6_TABLE_MAIN;
- net->ipv6.fib6_main_tbl->tb6_root.leaf = &ip6_null_entry;
+ net->ipv6.fib6_main_tbl->tb6_root.leaf = ip6_null_entry;
net->ipv6.fib6_main_tbl->tb6_root.fn_flags =
RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
@@ -1511,7 +1511,7 @@
if (!net->ipv6.fib6_local_tbl)
goto out_fib6_main_tbl;
net->ipv6.fib6_local_tbl->tb6_id = RT6_TABLE_LOCAL;
- net->ipv6.fib6_local_tbl->tb6_root.leaf = &ip6_null_entry;
+ net->ipv6.fib6_local_tbl->tb6_root.leaf = ip6_null_entry;
net->ipv6.fib6_local_tbl->tb6_root.fn_flags =
RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
#endif
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
}
