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1da177e4 LT |
1 | #ifndef __NET_ACT_API_H |
2 | #define __NET_ACT_API_H | |
3 | ||
4 | /* | |
5 | * Public police action API for classifiers/qdiscs | |
6 | */ | |
7 | ||
8 | #include <net/sch_generic.h> | |
9 | #include <net/pkt_sched.h> | |
ddf97ccd WC |
10 | #include <net/net_namespace.h> |
11 | #include <net/netns/generic.h> | |
1da177e4 | 12 | |
e9ce1cd3 | 13 | struct tcf_common { |
89819dc0 | 14 | struct hlist_node tcfc_head; |
e9ce1cd3 DM |
15 | u32 tcfc_index; |
16 | int tcfc_refcnt; | |
17 | int tcfc_bindcnt; | |
18 | u32 tcfc_capab; | |
19 | int tcfc_action; | |
20 | struct tcf_t tcfc_tm; | |
c1a8f1f1 | 21 | struct gnet_stats_basic_packed tcfc_bstats; |
e9ce1cd3 | 22 | struct gnet_stats_queue tcfc_qstats; |
45203a3b | 23 | struct gnet_stats_rate_est64 tcfc_rate_est; |
e9ce1cd3 | 24 | spinlock_t tcfc_lock; |
c7de2cf0 | 25 | struct rcu_head tcfc_rcu; |
519c818e ED |
26 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
27 | struct gnet_stats_queue __percpu *cpu_qstats; | |
e9ce1cd3 | 28 | }; |
89819dc0 | 29 | #define tcf_head common.tcfc_head |
e9ce1cd3 DM |
30 | #define tcf_index common.tcfc_index |
31 | #define tcf_refcnt common.tcfc_refcnt | |
32 | #define tcf_bindcnt common.tcfc_bindcnt | |
33 | #define tcf_capab common.tcfc_capab | |
34 | #define tcf_action common.tcfc_action | |
35 | #define tcf_tm common.tcfc_tm | |
36 | #define tcf_bstats common.tcfc_bstats | |
37 | #define tcf_qstats common.tcfc_qstats | |
38 | #define tcf_rate_est common.tcfc_rate_est | |
e9ce1cd3 | 39 | #define tcf_lock common.tcfc_lock |
c7de2cf0 | 40 | #define tcf_rcu common.tcfc_rcu |
e9ce1cd3 | 41 | |
e9ce1cd3 | 42 | struct tcf_hashinfo { |
89819dc0 | 43 | struct hlist_head *htab; |
e9ce1cd3 | 44 | unsigned int hmask; |
89819dc0 | 45 | spinlock_t lock; |
ddafd34f | 46 | u32 index; |
e9ce1cd3 DM |
47 | }; |
48 | ||
49 | static inline unsigned int tcf_hash(u32 index, unsigned int hmask) | |
50 | { | |
51 | return index & hmask; | |
52 | } | |
1da177e4 | 53 | |
369ba567 WC |
54 | static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask) |
55 | { | |
89819dc0 WC |
56 | int i; |
57 | ||
58 | spin_lock_init(&hf->lock); | |
ddafd34f | 59 | hf->index = 0; |
369ba567 | 60 | hf->hmask = mask; |
89819dc0 | 61 | hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head), |
369ba567 WC |
62 | GFP_KERNEL); |
63 | if (!hf->htab) | |
64 | return -ENOMEM; | |
89819dc0 WC |
65 | for (i = 0; i < mask + 1; i++) |
66 | INIT_HLIST_HEAD(&hf->htab[i]); | |
369ba567 WC |
67 | return 0; |
68 | } | |
69 | ||
56e5d1ca ED |
70 | /* Update lastuse only if needed, to avoid dirtying a cache line. |
71 | * We use a temp variable to avoid fetching jiffies twice. | |
72 | */ | |
73 | static inline void tcf_lastuse_update(struct tcf_t *tm) | |
74 | { | |
75 | unsigned long now = jiffies; | |
76 | ||
77 | if (tm->lastuse != now) | |
78 | tm->lastuse = now; | |
79 | } | |
80 | ||
e9ce1cd3 DM |
81 | struct tc_action { |
82 | void *priv; | |
dc7f9f6e | 83 | const struct tc_action_ops *ops; |
e9ce1cd3 DM |
84 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
85 | __u32 order; | |
33be6271 | 86 | struct list_head list; |
ddf97ccd | 87 | struct tcf_hashinfo *hinfo; |
1da177e4 LT |
88 | }; |
89 | ||
00175aec AV |
90 | #ifdef CONFIG_NET_CLS_ACT |
91 | ||
92 | #define ACT_P_CREATED 1 | |
93 | #define ACT_P_DELETED 1 | |
94 | ||
e9ce1cd3 | 95 | struct tc_action_ops { |
1f747c26 | 96 | struct list_head head; |
1da177e4 LT |
97 | char kind[IFNAMSIZ]; |
98 | __u32 type; /* TBD to match kind */ | |
1da177e4 | 99 | struct module *owner; |
dc7f9f6e | 100 | int (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *); |
e9ce1cd3 | 101 | int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
a5b5c958 | 102 | void (*cleanup)(struct tc_action *, int bind); |
ddf97ccd | 103 | int (*lookup)(struct net *, struct tc_action *, u32); |
c1b52739 BL |
104 | int (*init)(struct net *net, struct nlattr *nla, |
105 | struct nlattr *est, struct tc_action *act, int ovr, | |
106 | int bind); | |
ddf97ccd WC |
107 | int (*walk)(struct net *, struct sk_buff *, |
108 | struct netlink_callback *, int, struct tc_action *); | |
109 | }; | |
110 | ||
111 | struct tc_action_net { | |
112 | struct tcf_hashinfo *hinfo; | |
113 | const struct tc_action_ops *ops; | |
1da177e4 LT |
114 | }; |
115 | ||
ddf97ccd WC |
116 | static inline |
117 | int tc_action_net_init(struct tc_action_net *tn, const struct tc_action_ops *ops, | |
118 | unsigned int mask) | |
119 | { | |
120 | int err = 0; | |
121 | ||
122 | tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL); | |
123 | if (!tn->hinfo) | |
124 | return -ENOMEM; | |
125 | tn->ops = ops; | |
126 | err = tcf_hashinfo_init(tn->hinfo, mask); | |
127 | if (err) | |
128 | kfree(tn->hinfo); | |
129 | return err; | |
130 | } | |
131 | ||
132 | void tcf_hashinfo_destroy(const struct tc_action_ops *ops, | |
133 | struct tcf_hashinfo *hinfo); | |
134 | ||
135 | static inline void tc_action_net_exit(struct tc_action_net *tn) | |
136 | { | |
137 | tcf_hashinfo_destroy(tn->ops, tn->hinfo); | |
138 | } | |
139 | ||
140 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, | |
141 | struct netlink_callback *cb, int type, | |
142 | struct tc_action *a); | |
143 | int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index); | |
144 | u32 tcf_hash_new_index(struct tc_action_net *tn); | |
145 | int tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a, | |
146 | int bind); | |
147 | int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est, | |
148 | struct tc_action *a, int size, int bind, bool cpustats); | |
86062033 | 149 | void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est); |
ddf97ccd | 150 | void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a); |
e9ce1cd3 | 151 | |
28e6b67f DB |
152 | int __tcf_hash_release(struct tc_action *a, bool bind, bool strict); |
153 | ||
154 | static inline int tcf_hash_release(struct tc_action *a, bool bind) | |
155 | { | |
156 | return __tcf_hash_release(a, bind, false); | |
157 | } | |
158 | ||
ddf97ccd WC |
159 | int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
160 | int tcf_unregister_action(struct tc_action_ops *a, struct pernet_operations *ops); | |
55334a5d | 161 | int tcf_action_destroy(struct list_head *actions, int bind); |
33be6271 | 162 | int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions, |
5c15257f | 163 | struct tcf_result *res); |
33be6271 | 164 | int tcf_action_init(struct net *net, struct nlattr *nla, |
5c15257f | 165 | struct nlattr *est, char *n, int ovr, |
33be6271 | 166 | int bind, struct list_head *); |
5c15257f JP |
167 | struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, |
168 | struct nlattr *est, char *n, int ovr, | |
169 | int bind); | |
33be6271 | 170 | int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); |
5c15257f JP |
171 | int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
172 | int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); | |
173 | int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); | |
00175aec AV |
174 | |
175 | #define tc_no_actions(_exts) \ | |
176 | (list_empty(&(_exts)->actions)) | |
177 | ||
178 | #define tc_for_each_action(_a, _exts) \ | |
179 | list_for_each_entry(a, &(_exts)->actions, list) | |
180 | #else /* CONFIG_NET_CLS_ACT */ | |
181 | ||
182 | #define tc_no_actions(_exts) true | |
183 | #define tc_for_each_action(_a, _exts) while (0) | |
184 | ||
1da177e4 | 185 | #endif /* CONFIG_NET_CLS_ACT */ |
1da177e4 | 186 | #endif |