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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
14c0b97d TG |
2 | #ifndef __NET_FIB_RULES_H |
3 | #define __NET_FIB_RULES_H | |
4 | ||
5 | #include <linux/types.h> | |
5a0e3ad6 | 6 | #include <linux/slab.h> |
14c0b97d TG |
7 | #include <linux/netdevice.h> |
8 | #include <linux/fib_rules.h> | |
717d1e99 | 9 | #include <linux/refcount.h> |
14c0b97d | 10 | #include <net/flow.h> |
9d9e6a58 | 11 | #include <net/rtnetlink.h> |
1b2a4440 | 12 | #include <net/fib_notifier.h> |
14c0b97d | 13 | |
622ec2c9 LC |
14 | struct fib_kuid_range { |
15 | kuid_t start; | |
16 | kuid_t end; | |
17 | }; | |
18 | ||
fd2c3ef7 | 19 | struct fib_rule { |
14c0b97d | 20 | struct list_head list; |
491deb24 | 21 | int iifindex; |
1b038a5e | 22 | int oifindex; |
b8964ed9 TG |
23 | u32 mark; |
24 | u32 mark_mask; | |
14c0b97d TG |
25 | u32 flags; |
26 | u32 table; | |
27 | u8 action; | |
96c63fa7 | 28 | u8 l3mdev; |
cac56209 | 29 | u8 proto; |
bfff4862 | 30 | u8 ip_proto; |
0947c9fe | 31 | u32 target; |
e7030878 | 32 | __be64 tun_id; |
7a2b03c5 | 33 | struct fib_rule __rcu *ctarget; |
fba3679d ED |
34 | struct net *fr_net; |
35 | ||
717d1e99 | 36 | refcount_t refcnt; |
fba3679d ED |
37 | u32 pref; |
38 | int suppress_ifgroup; | |
39 | int suppress_prefixlen; | |
491deb24 | 40 | char iifname[IFNAMSIZ]; |
1b038a5e | 41 | char oifname[IFNAMSIZ]; |
622ec2c9 | 42 | struct fib_kuid_range uid_range; |
bfff4862 RP |
43 | struct fib_rule_port_range sport_range; |
44 | struct fib_rule_port_range dport_range; | |
14c0b97d TG |
45 | struct rcu_head rcu; |
46 | }; | |
47 | ||
fd2c3ef7 | 48 | struct fib_lookup_arg { |
14c0b97d | 49 | void *lookup_ptr; |
b75cc8f9 | 50 | const void *lookup_data; |
14c0b97d TG |
51 | void *result; |
52 | struct fib_rule *rule; | |
96c63fa7 | 53 | u32 table; |
ebc0ffae | 54 | int flags; |
0eeb075f AG |
55 | #define FIB_LOOKUP_NOREF 1 |
56 | #define FIB_LOOKUP_IGNORE_LINKSTATE 2 | |
14c0b97d TG |
57 | }; |
58 | ||
fd2c3ef7 | 59 | struct fib_rules_ops { |
14c0b97d TG |
60 | int family; |
61 | struct list_head list; | |
62 | int rule_size; | |
e1701c68 | 63 | int addr_size; |
0947c9fe TG |
64 | int unresolved_rules; |
65 | int nr_goto_rules; | |
1b2a4440 | 66 | unsigned int fib_rules_seq; |
14c0b97d TG |
67 | |
68 | int (*action)(struct fib_rule *, | |
69 | struct flowi *, int, | |
70 | struct fib_lookup_arg *); | |
7764a45a ST |
71 | bool (*suppress)(struct fib_rule *, |
72 | struct fib_lookup_arg *); | |
14c0b97d TG |
73 | int (*match)(struct fib_rule *, |
74 | struct flowi *, int); | |
75 | int (*configure)(struct fib_rule *, | |
76 | struct sk_buff *, | |
14c0b97d | 77 | struct fib_rule_hdr *, |
b16fb418 RP |
78 | struct nlattr **, |
79 | struct netlink_ext_ack *); | |
0ddcf43d | 80 | int (*delete)(struct fib_rule *); |
14c0b97d TG |
81 | int (*compare)(struct fib_rule *, |
82 | struct fib_rule_hdr *, | |
83 | struct nlattr **); | |
84 | int (*fill)(struct fib_rule *, struct sk_buff *, | |
14c0b97d | 85 | struct fib_rule_hdr *); |
339bf98f | 86 | size_t (*nlmsg_payload)(struct fib_rule *); |
14c0b97d | 87 | |
73417f61 TG |
88 | /* Called after modifications to the rules set, must flush |
89 | * the route cache if one exists. */ | |
ae299fc0 | 90 | void (*flush_cache)(struct fib_rules_ops *ops); |
73417f61 | 91 | |
14c0b97d | 92 | int nlgroup; |
ef7c79ed | 93 | const struct nla_policy *policy; |
76c72d4f | 94 | struct list_head rules_list; |
14c0b97d | 95 | struct module *owner; |
03592383 | 96 | struct net *fro_net; |
e9c5158a | 97 | struct rcu_head rcu; |
14c0b97d TG |
98 | }; |
99 | ||
1b2a4440 IS |
100 | struct fib_rule_notifier_info { |
101 | struct fib_notifier_info info; /* must be first */ | |
102 | struct fib_rule *rule; | |
103 | }; | |
104 | ||
1f6c9557 | 105 | #define FRA_GENERIC_POLICY \ |
491deb24 | 106 | [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ |
1b038a5e | 107 | [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ |
1f6c9557 TG |
108 | [FRA_PRIORITY] = { .type = NLA_U32 }, \ |
109 | [FRA_FWMARK] = { .type = NLA_U32 }, \ | |
110 | [FRA_FWMASK] = { .type = NLA_U32 }, \ | |
0947c9fe | 111 | [FRA_TABLE] = { .type = NLA_U32 }, \ |
73f5698e | 112 | [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \ |
6ef94cfa | 113 | [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \ |
96c63fa7 | 114 | [FRA_GOTO] = { .type = NLA_U32 }, \ |
622ec2c9 | 115 | [FRA_L3MDEV] = { .type = NLA_U8 }, \ |
1b71af60 | 116 | [FRA_UID_RANGE] = { .len = sizeof(struct fib_rule_uid_range) }, \ |
5f6f845b RP |
117 | [FRA_PROTOCOL] = { .type = NLA_U8 }, \ |
118 | [FRA_IP_PROTO] = { .type = NLA_U8 }, \ | |
119 | [FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }, \ | |
120 | [FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) } | |
121 | ||
1f6c9557 | 122 | |
14c0b97d TG |
123 | static inline void fib_rule_get(struct fib_rule *rule) |
124 | { | |
717d1e99 | 125 | refcount_inc(&rule->refcnt); |
14c0b97d TG |
126 | } |
127 | ||
14c0b97d TG |
128 | static inline void fib_rule_put(struct fib_rule *rule) |
129 | { | |
717d1e99 | 130 | if (refcount_dec_and_test(&rule->refcnt)) |
efd7ef1c | 131 | kfree_rcu(rule, rcu); |
14c0b97d TG |
132 | } |
133 | ||
96c63fa7 DA |
134 | #ifdef CONFIG_NET_L3_MASTER_DEV |
135 | static inline u32 fib_rule_get_table(struct fib_rule *rule, | |
136 | struct fib_lookup_arg *arg) | |
137 | { | |
138 | return rule->l3mdev ? arg->table : rule->table; | |
139 | } | |
140 | #else | |
141 | static inline u32 fib_rule_get_table(struct fib_rule *rule, | |
142 | struct fib_lookup_arg *arg) | |
143 | { | |
144 | return rule->table; | |
145 | } | |
146 | #endif | |
147 | ||
9e762a4a PM |
148 | static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla) |
149 | { | |
150 | if (nla[FRA_TABLE]) | |
151 | return nla_get_u32(nla[FRA_TABLE]); | |
152 | return frh->table; | |
153 | } | |
154 | ||
bfff4862 RP |
155 | static inline bool fib_rule_port_range_set(const struct fib_rule_port_range *range) |
156 | { | |
157 | return range->start != 0 && range->end != 0; | |
158 | } | |
159 | ||
160 | static inline bool fib_rule_port_inrange(const struct fib_rule_port_range *a, | |
161 | __be16 port) | |
162 | { | |
163 | return ntohs(port) >= a->start && | |
164 | ntohs(port) <= a->end; | |
165 | } | |
166 | ||
167 | static inline bool fib_rule_port_range_valid(const struct fib_rule_port_range *a) | |
168 | { | |
169 | return a->start != 0 && a->end != 0 && a->end < 0xffff && | |
170 | a->start <= a->end; | |
171 | } | |
172 | ||
173 | static inline bool fib_rule_port_range_compare(struct fib_rule_port_range *a, | |
174 | struct fib_rule_port_range *b) | |
175 | { | |
176 | return a->start == b->start && | |
177 | a->end == b->end; | |
178 | } | |
179 | ||
180 | static inline bool fib_rule_requires_fldissect(struct fib_rule *rule) | |
181 | { | |
182 | return rule->ip_proto || | |
183 | fib_rule_port_range_set(&rule->sport_range) || | |
184 | fib_rule_port_range_set(&rule->dport_range); | |
185 | } | |
186 | ||
8de6879f JP |
187 | struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, |
188 | struct net *); | |
189 | void fib_rules_unregister(struct fib_rules_ops *); | |
14c0b97d | 190 | |
8de6879f JP |
191 | int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags, |
192 | struct fib_lookup_arg *); | |
193 | int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table, | |
194 | u32 flags); | |
3c71006d | 195 | bool fib_rule_matchall(const struct fib_rule *rule); |
1b2a4440 IS |
196 | int fib_rules_dump(struct net *net, struct notifier_block *nb, int family); |
197 | unsigned int fib_rules_seq_read(struct net *net, int family); | |
96c63fa7 | 198 | |
c21ef3e3 DA |
199 | int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, |
200 | struct netlink_ext_ack *extack); | |
201 | int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, | |
202 | struct netlink_ext_ack *extack); | |
14c0b97d | 203 | #endif |