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-rw-r--r--include/net/dst.h11
-rw-r--r--include/net/ip6_fib.h3
-rw-r--r--net/ipv6/ip6_fib.c47
-rw-r--r--net/ipv6/route.c44
4 files changed, 66 insertions, 39 deletions
diff --git a/include/net/dst.h b/include/net/dst.h
index e01a826f2a9c..46ed958e0c6e 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -108,9 +108,11 @@ struct dst_entry {
u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
extern const u32 dst_default_metrics[];
-#define DST_METRICS_READ_ONLY 0x1UL
+#define DST_METRICS_READ_ONLY 0x1UL
+#define DST_METRICS_FORCE_OVERWRITE 0x2UL
+#define DST_METRICS_FLAGS 0x3UL
#define __DST_METRICS_PTR(Y) \
- ((u32 *)((Y) & ~DST_METRICS_READ_ONLY))
+ ((u32 *)((Y) & ~DST_METRICS_FLAGS))
#define DST_METRICS_PTR(X) __DST_METRICS_PTR((X)->_metrics)
static inline bool dst_metrics_read_only(const struct dst_entry *dst)
@@ -118,6 +120,11 @@ static inline bool dst_metrics_read_only(const struct dst_entry *dst)
return dst->_metrics & DST_METRICS_READ_ONLY;
}
+static inline void dst_metrics_set_force_overwrite(struct dst_entry *dst)
+{
+ dst->_metrics |= DST_METRICS_FORCE_OVERWRITE;
+}
+
void __dst_destroy_metrics_generic(struct dst_entry *dst, unsigned long old);
static inline void dst_destroy_metrics_generic(struct dst_entry *dst)
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index aca0c2709fd6..9bcb220bd4ad 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -284,7 +284,8 @@ struct fib6_node *fib6_locate(struct fib6_node *root,
void fib6_clean_all(struct net *net, int (*func)(struct rt6_info *, void *arg),
void *arg);
-int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info);
+int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info,
+ struct nlattr *mx, int mx_len);
int fib6_del(struct rt6_info *rt, struct nl_info *info);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 075602fc6b6a..4ee487b103ae 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -638,12 +638,41 @@ static inline bool rt6_qualify_for_ecmp(struct rt6_info *rt)
RTF_GATEWAY;
}
+static int fib6_commit_metrics(struct dst_entry *dst,
+ struct nlattr *mx, int mx_len)
+{
+ struct nlattr *nla;
+ int remaining;
+ u32 *mp;
+
+ if (dst->flags & DST_HOST) {
+ mp = dst_metrics_write_ptr(dst);
+ } else {
+ mp = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
+ if (!mp)
+ return -ENOMEM;
+ dst_init_metrics(dst, mp, 0);
+ }
+
+ nla_for_each_attr(nla, mx, mx_len, remaining) {
+ int type = nla_type(nla);
+
+ if (type) {
+ if (type > RTAX_MAX)
+ return -EINVAL;
+
+ mp[type - 1] = nla_get_u32(nla);
+ }
+ }
+ return 0;
+}
+
/*
* Insert routing information in a node.
*/
static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
- struct nl_info *info)
+ struct nl_info *info, struct nlattr *mx, int mx_len)
{
struct rt6_info *iter = NULL;
struct rt6_info **ins;
@@ -653,6 +682,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
(info->nlh->nlmsg_flags & NLM_F_CREATE));
int found = 0;
bool rt_can_ecmp = rt6_qualify_for_ecmp(rt);
+ int err;
ins = &fn->leaf;
@@ -751,6 +781,11 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
pr_warn("NLM_F_CREATE should be set when creating new route\n");
add:
+ if (mx) {
+ err = fib6_commit_metrics(&rt->dst, mx, mx_len);
+ if (err)
+ return err;
+ }
rt->dst.rt6_next = iter;
*ins = rt;
rt->rt6i_node = fn;
@@ -770,6 +805,11 @@ add:
pr_warn("NLM_F_REPLACE set, but no existing node found!\n");
return -ENOENT;
}
+ if (mx) {
+ err = fib6_commit_metrics(&rt->dst, mx, mx_len);
+ if (err)
+ return err;
+ }
*ins = rt;
rt->rt6i_node = fn;
rt->dst.rt6_next = iter->dst.rt6_next;
@@ -806,7 +846,8 @@ void fib6_force_start_gc(struct net *net)
* with source addr info in sub-trees
*/
-int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info)
+int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info,
+ struct nlattr *mx, int mx_len)
{
struct fib6_node *fn, *pn = NULL;
int err = -ENOMEM;
@@ -900,7 +941,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info)
}
#endif
- err = fib6_add_rt2node(fn, rt, info);
+ err = fib6_add_rt2node(fn, rt, info, mx, mx_len);
if (!err) {
fib6_start_gc(info->nl_net, rt);
if (!(rt->rt6i_flags & RTF_CACHE))
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fba54a407bb2..b93ae6a6a31c 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -149,7 +149,8 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
unsigned long prev, new;
p = peer->metrics;
- if (inet_metrics_new(peer))
+ if (inet_metrics_new(peer) ||
+ (old & DST_METRICS_FORCE_OVERWRITE))
memcpy(p, old_p, sizeof(u32) * RTAX_MAX);
new = (unsigned long) p;
@@ -857,14 +858,15 @@ EXPORT_SYMBOL(rt6_lookup);
be destroyed.
*/
-static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info)
+static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info,
+ struct nlattr *mx, int mx_len)
{
int err;
struct fib6_table *table;
table = rt->rt6i_table;
write_lock_bh(&table->tb6_lock);
- err = fib6_add(&table->tb6_root, rt, info);
+ err = fib6_add(&table->tb6_root, rt, info, mx, mx_len);
write_unlock_bh(&table->tb6_lock);
return err;
@@ -875,7 +877,7 @@ int ip6_ins_rt(struct rt6_info *rt)
struct nl_info info = {
.nl_net = dev_net(rt->dst.dev),
};
- return __ip6_ins_rt(rt, &info);
+ return __ip6_ins_rt(rt, &info, NULL, 0);
}
static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
@@ -1543,17 +1545,11 @@ int ip6_route_add(struct fib6_config *cfg)
ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
rt->rt6i_dst.plen = cfg->fc_dst_len;
- if (rt->rt6i_dst.plen == 128)
- rt->dst.flags |= DST_HOST;
-
- if (!(rt->dst.flags & DST_HOST) && cfg->fc_mx) {
- u32 *metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
- if (!metrics) {
- err = -ENOMEM;
- goto out;
- }
- dst_init_metrics(&rt->dst, metrics, 0);
+ if (rt->rt6i_dst.plen == 128) {
+ rt->dst.flags |= DST_HOST;
+ dst_metrics_set_force_overwrite(&rt->dst);
}
+
#ifdef CONFIG_IPV6_SUBTREES
ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
rt->rt6i_src.plen = cfg->fc_src_len;
@@ -1672,31 +1668,13 @@ int ip6_route_add(struct fib6_config *cfg)
rt->rt6i_flags = cfg->fc_flags;
install_route:
- if (cfg->fc_mx) {
- struct nlattr *nla;
- int remaining;
-
- nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
- int type = nla_type(nla);
-
- if (type) {
- if (type > RTAX_MAX) {
- err = -EINVAL;
- goto out;
- }
-
- dst_metric_set(&rt->dst, type, nla_get_u32(nla));
- }
- }
- }
-
rt->dst.dev = dev;
rt->rt6i_idev = idev;
rt->rt6i_table = table;
cfg->fc_nlinfo.nl_net = dev_net(dev);
- return __ip6_ins_rt(rt, &cfg->fc_nlinfo);
+ return __ip6_ins_rt(rt, &cfg->fc_nlinfo, cfg->fc_mx, cfg->fc_mx_len);
out:
if (dev)
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-20 03:56:31 +0000