1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -55,6 +55,7 @@ struct netns_ipv6 {
unsigned long ip6_rt_last_gc;
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
struct rt6_info *ip6_prohibit_entry;
+ struct rt6_info *ip6_failed_policy_entry;
struct rt6_info *ip6_blk_hole_entry;
struct fib6_table *fib6_local_tbl;
struct fib_rules_ops *fib6_rules_ops;
--- a/include/uapi/linux/fib_rules.h
+++ b/include/uapi/linux/fib_rules.h
@@ -64,6 +64,10 @@ enum {
FR_ACT_BLACKHOLE, /* Drop without notification */
FR_ACT_UNREACHABLE, /* Drop with ENETUNREACH */
FR_ACT_PROHIBIT, /* Drop with EACCES */
+ FR_ACT_RES9,
+ FR_ACT_RES10,
+ FR_ACT_RES11,
+ FR_ACT_FAILED_POLICY, /* Drop with EPERM */
__FR_ACT_MAX,
};
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -203,6 +203,7 @@ enum {
RTN_THROW, /* Not in this table */
RTN_NAT, /* Translate this address */
RTN_XRESOLVE, /* Use external resolver */
+ RTN_FAILED_POLICY, /* Failed ingress/egress policy */
__RTN_MAX
};
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -84,6 +84,10 @@ static int fib4_rule_action(struct fib_r
err = -EACCES;
goto errout;
+ case FR_ACT_FAILED_POLICY:
+ err = -EPERM;
+ goto errout;
+
case FR_ACT_BLACKHOLE:
default:
err = -EINVAL;
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -138,6 +138,10 @@ const struct fib_prop fib_props[RTN_MAX
.error = -EINVAL,
.scope = RT_SCOPE_NOWHERE,
},
+ [RTN_FAILED_POLICY] = {
+ .error = -EPERM,
+ .scope = RT_SCOPE_UNIVERSE,
+ },
};
static void rt_fibinfo_free(struct rtable __rcu **rtp)
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -2331,6 +2331,7 @@ static const char *const rtn_type_names[
[RTN_THROW] = "THROW",
[RTN_NAT] = "NAT",
[RTN_XRESOLVE] = "XRESOLVE",
+ [RTN_FAILED_POLICY] = "FAILED_POLICY",
};
static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -181,6 +181,7 @@ static int ipmr_rule_action(struct fib_r
case FR_ACT_UNREACHABLE:
return -ENETUNREACH;
case FR_ACT_PROHIBIT:
+ case FR_ACT_FAILED_POLICY:
return -EACCES;
case FR_ACT_BLACKHOLE:
default:
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -73,6 +73,9 @@ static int fib6_rule_action(struct fib_r
err = -EACCES;
rt = net->ipv6.ip6_prohibit_entry;
goto discard_pkt;
+ case FR_ACT_FAILED_POLICY:
+ rt = net->ipv6.ip6_failed_policy_entry;
+ goto discard_pkt;
}
table = fib6_get_table(net, rule->table);
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -166,6 +166,8 @@ static int ip6mr_rule_action(struct fib_
return -ENETUNREACH;
case FR_ACT_PROHIBIT:
return -EACCES;
+ case FR_ACT_FAILED_POLICY:
+ return -EPERM;
case FR_ACT_BLACKHOLE:
default:
return -EINVAL;
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -252,6 +252,24 @@ static const struct rt6_info ip6_prohibi
.rt6i_ref = ATOMIC_INIT(1),
};
+static int ip6_pkt_failed_policy(struct sk_buff *skb);
+static int ip6_pkt_failed_policy_out(struct sk_buff *skb);
+
+static const struct rt6_info ip6_failed_policy_entry_template = {
+ .dst = {
+ .__refcnt = ATOMIC_INIT(1),
+ .__use = 1,
+ .obsolete = DST_OBSOLETE_FORCE_CHK,
+ .error = -EPERM,
+ .input = ip6_pkt_failed_policy,
+ .output = ip6_pkt_failed_policy_out,
+ },
+ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
+ .rt6i_protocol = RTPROT_KERNEL,
+ .rt6i_metric = ~(u32) 0,
+ .rt6i_ref = ATOMIC_INIT(1),
+};
+
static const struct rt6_info ip6_blk_hole_entry_template = {
.dst = {
.__refcnt = ATOMIC_INIT(1),
@@ -1583,6 +1601,9 @@ int ip6_route_add(struct fib6_config *cf
case RTN_THROW:
rt->dst.error = -EAGAIN;
break;
+ case RTN_FAILED_POLICY:
+ rt->dst.error = -EPERM;
+ break;
default:
rt->dst.error = -ENETUNREACH;
break;
@@ -2162,6 +2183,17 @@ static int ip6_pkt_prohibit_out(struct s
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
}
+static int ip6_pkt_failed_policy(struct sk_buff *skb)
+{
+ return ip6_pkt_drop(skb, ICMPV6_POLICY_FAIL, IPSTATS_MIB_INNOROUTES);
+}
+
+static int ip6_pkt_failed_policy_out(struct sk_buff *skb)
+{
+ skb->dev = skb_dst(skb)->dev;
+ return ip6_pkt_drop(skb, ICMPV6_POLICY_FAIL, IPSTATS_MIB_OUTNOROUTES);
+}
+
#endif
/*
@@ -2368,7 +2400,8 @@ static int rtm_to_fib6_config(struct sk_
if (rtm->rtm_type == RTN_UNREACHABLE ||
rtm->rtm_type == RTN_BLACKHOLE ||
rtm->rtm_type == RTN_PROHIBIT ||
- rtm->rtm_type == RTN_THROW)
+ rtm->rtm_type == RTN_THROW ||
+ rtm->rtm_type == RTN_FAILED_POLICY)
cfg->fc_flags |= RTF_REJECT;
if (rtm->rtm_type == RTN_LOCAL)
@@ -2570,6 +2603,9 @@ static int rt6_fill_node(struct net *net
case -EACCES:
rtm->rtm_type = RTN_PROHIBIT;
break;
+ case -EPERM:
+ rtm->rtm_type = RTN_FAILED_POLICY;
+ break;
case -EAGAIN:
rtm->rtm_type = RTN_THROW;
break;
@@ -2820,6 +2856,8 @@ static int ip6_route_dev_notify(struct n
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
net->ipv6.ip6_prohibit_entry->dst.dev = dev;
net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
+ net->ipv6.ip6_failed_policy_entry->dst.dev = dev;
+ net->ipv6.ip6_failed_policy_entry->rt6i_idev = in6_dev_get(dev);
net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
#endif
@@ -3080,6 +3118,17 @@ static int __net_init ip6_route_net_init
net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
ip6_template_metrics, true);
+
+ net->ipv6.ip6_failed_policy_entry =
+ kmemdup(&ip6_failed_policy_entry_template,
+ sizeof(*net->ipv6.ip6_failed_policy_entry), GFP_KERNEL);
+ if (!net->ipv6.ip6_failed_policy_entry)
+ goto out_ip6_blk_hole_entry;
+ net->ipv6.ip6_failed_policy_entry->dst.path =
+ (struct dst_entry *)net->ipv6.ip6_failed_policy_entry;
+ net->ipv6.ip6_failed_policy_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+ dst_init_metrics(&net->ipv6.ip6_failed_policy_entry->dst,
+ ip6_template_metrics, true);
#endif
net->ipv6.sysctl.flush_delay = 0;
@@ -3098,6 +3147,8 @@ out:
return ret;
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+out_ip6_blk_hole_entry:
+ kfree(net->ipv6.ip6_blk_hole_entry);
out_ip6_prohibit_entry:
kfree(net->ipv6.ip6_prohibit_entry);
out_ip6_null_entry:
@@ -3115,6 +3166,7 @@ static void __net_exit ip6_route_net_exi
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
kfree(net->ipv6.ip6_prohibit_entry);
kfree(net->ipv6.ip6_blk_hole_entry);
+ kfree(net->ipv6.ip6_failed_policy_entry);
#endif
dst_entries_destroy(&net->ipv6.ip6_dst_ops);
}
@@ -3211,6 +3263,9 @@ int __init ip6_route_init(void)
init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+ init_net.ipv6.ip6_failed_policy_entry->dst.dev = init_net.loopback_dev;
+ init_net.ipv6.ip6_failed_policy_entry->rt6i_idev =
+ in6_dev_get(init_net.loopback_dev);
#endif
ret = fib6_init();
if (ret)
|
