Revert "[PATCH] x86-64: fix x86_64-mm-sched-clock-share"
[linux-2.6/zen-sources.git] / include / linux / netfilter / x_tables.h
blob64f425a855bb7c191467c2e537a3fc4ce4b6af51
1 #ifndef _X_TABLES_H
2 #define _X_TABLES_H
4 #define XT_FUNCTION_MAXNAMELEN 30
5 #define XT_TABLE_MAXNAMELEN 32
7 struct xt_entry_match
9 union {
10 struct {
11 u_int16_t match_size;
13 /* Used by userspace */
14 char name[XT_FUNCTION_MAXNAMELEN-1];
16 u_int8_t revision;
17 } user;
18 struct {
19 u_int16_t match_size;
21 /* Used inside the kernel */
22 struct xt_match *match;
23 } kernel;
25 /* Total length */
26 u_int16_t match_size;
27 } u;
29 unsigned char data[0];
32 struct xt_entry_target
34 union {
35 struct {
36 u_int16_t target_size;
38 /* Used by userspace */
39 char name[XT_FUNCTION_MAXNAMELEN-1];
41 u_int8_t revision;
42 } user;
43 struct {
44 u_int16_t target_size;
46 /* Used inside the kernel */
47 struct xt_target *target;
48 } kernel;
50 /* Total length */
51 u_int16_t target_size;
52 } u;
54 unsigned char data[0];
57 #define XT_TARGET_INIT(__name, __size) \
58 { \
59 .target.u.user = { \
60 .target_size = XT_ALIGN(__size), \
61 .name = __name, \
62 }, \
65 struct xt_standard_target
67 struct xt_entry_target target;
68 int verdict;
71 /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
72 * kernel supports, if >= revision. */
73 struct xt_get_revision
75 char name[XT_FUNCTION_MAXNAMELEN-1];
77 u_int8_t revision;
80 /* CONTINUE verdict for targets */
81 #define XT_CONTINUE 0xFFFFFFFF
83 /* For standard target */
84 #define XT_RETURN (-NF_REPEAT - 1)
86 /* this is a dummy structure to find out the alignment requirement for a struct
87 * containing all the fundamental data types that are used in ipt_entry,
88 * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
89 * personal pleasure to remove it -HW
91 struct _xt_align
93 u_int8_t u8;
94 u_int16_t u16;
95 u_int32_t u32;
96 u_int64_t u64;
99 #define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
100 & ~(__alignof__(struct _xt_align)-1))
102 /* Standard return verdict, or do jump. */
103 #define XT_STANDARD_TARGET ""
104 /* Error verdict. */
105 #define XT_ERROR_TARGET "ERROR"
107 #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
108 #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
110 struct xt_counters
112 u_int64_t pcnt, bcnt; /* Packet and byte counters */
115 /* The argument to IPT_SO_ADD_COUNTERS. */
116 struct xt_counters_info
118 /* Which table. */
119 char name[XT_TABLE_MAXNAMELEN];
121 unsigned int num_counters;
123 /* The counters (actually `number' of these). */
124 struct xt_counters counters[0];
127 #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
129 #ifdef __KERNEL__
131 #include <linux/netdevice.h>
133 struct xt_match
135 struct list_head list;
137 const char name[XT_FUNCTION_MAXNAMELEN-1];
139 /* Return true or false: return FALSE and set *hotdrop = 1 to
140 force immediate packet drop. */
141 /* Arguments changed since 2.6.9, as this must now handle
142 non-linear skb, using skb_header_pointer and
143 skb_ip_make_writable. */
144 bool (*match)(const struct sk_buff *skb,
145 const struct net_device *in,
146 const struct net_device *out,
147 const struct xt_match *match,
148 const void *matchinfo,
149 int offset,
150 unsigned int protoff,
151 bool *hotdrop);
153 /* Called when user tries to insert an entry of this type. */
154 /* Should return true or false. */
155 bool (*checkentry)(const char *tablename,
156 const void *ip,
157 const struct xt_match *match,
158 void *matchinfo,
159 unsigned int hook_mask);
161 /* Called when entry of this type deleted. */
162 void (*destroy)(const struct xt_match *match, void *matchinfo);
164 /* Called when userspace align differs from kernel space one */
165 void (*compat_from_user)(void *dst, void *src);
166 int (*compat_to_user)(void __user *dst, void *src);
168 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
169 struct module *me;
171 /* Free to use by each match */
172 unsigned long data;
174 char *table;
175 unsigned int matchsize;
176 unsigned int compatsize;
177 unsigned int hooks;
178 unsigned short proto;
180 unsigned short family;
181 u_int8_t revision;
184 /* Registration hooks for targets. */
185 struct xt_target
187 struct list_head list;
189 const char name[XT_FUNCTION_MAXNAMELEN-1];
191 /* Returns verdict. Argument order changed since 2.6.9, as this
192 must now handle non-linear skbs, using skb_copy_bits and
193 skb_ip_make_writable. */
194 unsigned int (*target)(struct sk_buff **pskb,
195 const struct net_device *in,
196 const struct net_device *out,
197 unsigned int hooknum,
198 const struct xt_target *target,
199 const void *targinfo);
201 /* Called when user tries to insert an entry of this type:
202 hook_mask is a bitmask of hooks from which it can be
203 called. */
204 /* Should return true or false. */
205 bool (*checkentry)(const char *tablename,
206 const void *entry,
207 const struct xt_target *target,
208 void *targinfo,
209 unsigned int hook_mask);
211 /* Called when entry of this type deleted. */
212 void (*destroy)(const struct xt_target *target, void *targinfo);
214 /* Called when userspace align differs from kernel space one */
215 void (*compat_from_user)(void *dst, void *src);
216 int (*compat_to_user)(void __user *dst, void *src);
218 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
219 struct module *me;
221 char *table;
222 unsigned int targetsize;
223 unsigned int compatsize;
224 unsigned int hooks;
225 unsigned short proto;
227 unsigned short family;
228 u_int8_t revision;
231 /* Furniture shopping... */
232 struct xt_table
234 struct list_head list;
236 /* A unique name... */
237 char name[XT_TABLE_MAXNAMELEN];
239 /* What hooks you will enter on */
240 unsigned int valid_hooks;
242 /* Lock for the curtain */
243 rwlock_t lock;
245 /* Man behind the curtain... */
246 //struct ip6t_table_info *private;
247 void *private;
249 /* Set this to THIS_MODULE if you are a module, otherwise NULL */
250 struct module *me;
252 int af; /* address/protocol family */
255 #include <linux/netfilter_ipv4.h>
257 /* The table itself */
258 struct xt_table_info
260 /* Size per table */
261 unsigned int size;
262 /* Number of entries: FIXME. --RR */
263 unsigned int number;
264 /* Initial number of entries. Needed for module usage count */
265 unsigned int initial_entries;
267 /* Entry points and underflows */
268 unsigned int hook_entry[NF_IP_NUMHOOKS];
269 unsigned int underflow[NF_IP_NUMHOOKS];
271 /* ipt_entry tables: one per CPU */
272 char *entries[NR_CPUS];
275 extern int xt_register_target(struct xt_target *target);
276 extern void xt_unregister_target(struct xt_target *target);
277 extern int xt_register_targets(struct xt_target *target, unsigned int n);
278 extern void xt_unregister_targets(struct xt_target *target, unsigned int n);
280 extern int xt_register_match(struct xt_match *target);
281 extern void xt_unregister_match(struct xt_match *target);
282 extern int xt_register_matches(struct xt_match *match, unsigned int n);
283 extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
285 extern int xt_check_match(const struct xt_match *match, unsigned short family,
286 unsigned int size, const char *table, unsigned int hook,
287 unsigned short proto, int inv_proto);
288 extern int xt_check_target(const struct xt_target *target, unsigned short family,
289 unsigned int size, const char *table, unsigned int hook,
290 unsigned short proto, int inv_proto);
292 extern int xt_register_table(struct xt_table *table,
293 struct xt_table_info *bootstrap,
294 struct xt_table_info *newinfo);
295 extern void *xt_unregister_table(struct xt_table *table);
297 extern struct xt_table_info *xt_replace_table(struct xt_table *table,
298 unsigned int num_counters,
299 struct xt_table_info *newinfo,
300 int *error);
302 extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
303 extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
304 extern struct xt_target *xt_request_find_target(int af, const char *name,
305 u8 revision);
306 extern int xt_find_revision(int af, const char *name, u8 revision, int target,
307 int *err);
309 extern struct xt_table *xt_find_table_lock(int af, const char *name);
310 extern void xt_table_unlock(struct xt_table *t);
312 extern int xt_proto_init(int af);
313 extern void xt_proto_fini(int af);
315 extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
316 extern void xt_free_table_info(struct xt_table_info *info);
318 #ifdef CONFIG_COMPAT
319 #include <net/compat.h>
321 struct compat_xt_entry_match
323 union {
324 struct {
325 u_int16_t match_size;
326 char name[XT_FUNCTION_MAXNAMELEN - 1];
327 u_int8_t revision;
328 } user;
329 struct {
330 u_int16_t match_size;
331 compat_uptr_t match;
332 } kernel;
333 u_int16_t match_size;
334 } u;
335 unsigned char data[0];
338 struct compat_xt_entry_target
340 union {
341 struct {
342 u_int16_t target_size;
343 char name[XT_FUNCTION_MAXNAMELEN - 1];
344 u_int8_t revision;
345 } user;
346 struct {
347 u_int16_t target_size;
348 compat_uptr_t target;
349 } kernel;
350 u_int16_t target_size;
351 } u;
352 unsigned char data[0];
355 /* FIXME: this works only on 32 bit tasks
356 * need to change whole approach in order to calculate align as function of
357 * current task alignment */
359 struct compat_xt_counters
361 #if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
362 u_int32_t cnt[4];
363 #else
364 u_int64_t cnt[2];
365 #endif
368 struct compat_xt_counters_info
370 char name[XT_TABLE_MAXNAMELEN];
371 compat_uint_t num_counters;
372 struct compat_xt_counters counters[0];
375 #define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
376 & ~(__alignof__(struct compat_xt_counters)-1))
378 extern void xt_compat_lock(int af);
379 extern void xt_compat_unlock(int af);
381 extern int xt_compat_match_offset(struct xt_match *match);
382 extern void xt_compat_match_from_user(struct xt_entry_match *m,
383 void **dstptr, int *size);
384 extern int xt_compat_match_to_user(struct xt_entry_match *m,
385 void __user **dstptr, int *size);
387 extern int xt_compat_target_offset(struct xt_target *target);
388 extern void xt_compat_target_from_user(struct xt_entry_target *t,
389 void **dstptr, int *size);
390 extern int xt_compat_target_to_user(struct xt_entry_target *t,
391 void __user **dstptr, int *size);
393 #endif /* CONFIG_COMPAT */
394 #endif /* __KERNEL__ */
396 #endif /* _X_TABLES_H */