Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/em_meta.c Metadata ematch |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Thomas Graf <tgraf@suug.ch> |
| 10 | * |
| 11 | * ========================================================================== |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 12 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * The metadata ematch compares two meta objects where each object |
| 14 | * represents either a meta value stored in the kernel or a static |
| 15 | * value provided by userspace. The objects are not provided by |
| 16 | * userspace itself but rather a definition providing the information |
| 17 | * to build them. Every object is of a certain type which must be |
| 18 | * equal to the object it is being compared to. |
| 19 | * |
| 20 | * The definition of a objects conists of the type (meta type), a |
| 21 | * identifier (meta id) and additional type specific information. |
| 22 | * The meta id is either TCF_META_TYPE_VALUE for values provided by |
| 23 | * userspace or a index to the meta operations table consisting of |
| 24 | * function pointers to type specific meta data collectors returning |
| 25 | * the value of the requested meta value. |
| 26 | * |
| 27 | * lvalue rvalue |
| 28 | * +-----------+ +-----------+ |
| 29 | * | type: INT | | type: INT | |
David S. Miller | 261688d | 2005-07-22 14:43:52 -0700 | [diff] [blame] | 30 | * def | id: DEV | | id: VALUE | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | * | data: | | data: 3 | |
| 32 | * +-----------+ +-----------+ |
| 33 | * | | |
David S. Miller | 261688d | 2005-07-22 14:43:52 -0700 | [diff] [blame] | 34 | * ---> meta_ops[INT][DEV](...) | |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 35 | * | | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * ----------- | |
| 37 | * V V |
| 38 | * +-----------+ +-----------+ |
| 39 | * | type: INT | | type: INT | |
David S. Miller | 261688d | 2005-07-22 14:43:52 -0700 | [diff] [blame] | 40 | * obj | id: DEV | | id: VALUE | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | * | data: 2 |<--data got filled out | data: 3 | |
| 42 | * +-----------+ +-----------+ |
| 43 | * | | |
| 44 | * --------------> 2 equals 3 <-------------- |
| 45 | * |
| 46 | * This is a simplified schema, the complexity varies depending |
| 47 | * on the meta type. Obviously, the length of the data must also |
| 48 | * be provided for non-numeric types. |
| 49 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 50 | * Additionally, type dependent modifiers such as shift operators |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | * or mask may be applied to extend the functionaliy. As of now, |
| 52 | * the variable length type supports shifting the byte string to |
| 53 | * the right, eating up any number of octets and thus supporting |
| 54 | * wildcard interface name comparisons such as "ppp%" matching |
| 55 | * ppp0..9. |
| 56 | * |
| 57 | * NOTE: Certain meta values depend on other subsystems and are |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 58 | * only available if that subsystem is enabled in the kernel. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | */ |
| 60 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 61 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <linux/module.h> |
| 63 | #include <linux/types.h> |
| 64 | #include <linux/kernel.h> |
| 65 | #include <linux/sched.h> |
| 66 | #include <linux/string.h> |
| 67 | #include <linux/skbuff.h> |
| 68 | #include <linux/random.h> |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 69 | #include <linux/if_vlan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #include <linux/tc_ematch/tc_em_meta.h> |
| 71 | #include <net/dst.h> |
| 72 | #include <net/route.h> |
| 73 | #include <net/pkt_cls.h> |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 74 | #include <net/sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 76 | struct meta_obj { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | unsigned long value; |
| 78 | unsigned int len; |
| 79 | }; |
| 80 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 81 | struct meta_value { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | struct tcf_meta_val hdr; |
| 83 | unsigned long val; |
| 84 | unsigned int len; |
| 85 | }; |
| 86 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 87 | struct meta_match { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | struct meta_value lvalue; |
| 89 | struct meta_value rvalue; |
| 90 | }; |
| 91 | |
| 92 | static inline int meta_id(struct meta_value *v) |
| 93 | { |
| 94 | return TCF_META_ID(v->hdr.kind); |
| 95 | } |
| 96 | |
| 97 | static inline int meta_type(struct meta_value *v) |
| 98 | { |
| 99 | return TCF_META_TYPE(v->hdr.kind); |
| 100 | } |
| 101 | |
| 102 | #define META_COLLECTOR(FUNC) static void meta_##FUNC(struct sk_buff *skb, \ |
| 103 | struct tcf_pkt_info *info, struct meta_value *v, \ |
| 104 | struct meta_obj *dst, int *err) |
| 105 | |
| 106 | /************************************************************************** |
| 107 | * System status & misc |
| 108 | **************************************************************************/ |
| 109 | |
| 110 | META_COLLECTOR(int_random) |
| 111 | { |
| 112 | get_random_bytes(&dst->value, sizeof(dst->value)); |
| 113 | } |
| 114 | |
| 115 | static inline unsigned long fixed_loadavg(int load) |
| 116 | { |
| 117 | int rnd_load = load + (FIXED_1/200); |
| 118 | int rnd_frac = ((rnd_load & (FIXED_1-1)) * 100) >> FSHIFT; |
| 119 | |
| 120 | return ((rnd_load >> FSHIFT) * 100) + rnd_frac; |
| 121 | } |
| 122 | |
| 123 | META_COLLECTOR(int_loadavg_0) |
| 124 | { |
| 125 | dst->value = fixed_loadavg(avenrun[0]); |
| 126 | } |
| 127 | |
| 128 | META_COLLECTOR(int_loadavg_1) |
| 129 | { |
| 130 | dst->value = fixed_loadavg(avenrun[1]); |
| 131 | } |
| 132 | |
| 133 | META_COLLECTOR(int_loadavg_2) |
| 134 | { |
| 135 | dst->value = fixed_loadavg(avenrun[2]); |
| 136 | } |
| 137 | |
| 138 | /************************************************************************** |
| 139 | * Device names & indices |
| 140 | **************************************************************************/ |
| 141 | |
| 142 | static inline int int_dev(struct net_device *dev, struct meta_obj *dst) |
| 143 | { |
| 144 | if (unlikely(dev == NULL)) |
| 145 | return -1; |
| 146 | |
| 147 | dst->value = dev->ifindex; |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static inline int var_dev(struct net_device *dev, struct meta_obj *dst) |
| 152 | { |
| 153 | if (unlikely(dev == NULL)) |
| 154 | return -1; |
| 155 | |
| 156 | dst->value = (unsigned long) dev->name; |
| 157 | dst->len = strlen(dev->name); |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | META_COLLECTOR(int_dev) |
| 162 | { |
| 163 | *err = int_dev(skb->dev, dst); |
| 164 | } |
| 165 | |
| 166 | META_COLLECTOR(var_dev) |
| 167 | { |
| 168 | *err = var_dev(skb->dev, dst); |
| 169 | } |
| 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | /************************************************************************** |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 172 | * vlan tag |
| 173 | **************************************************************************/ |
| 174 | |
| 175 | META_COLLECTOR(int_vlan_tag) |
| 176 | { |
Stephen Hemminger | 1a31f20 | 2009-04-13 18:12:57 -0700 | [diff] [blame] | 177 | unsigned short tag; |
| 178 | |
| 179 | tag = vlan_tx_tag_get(skb); |
| 180 | if (!tag && __vlan_get_tag(skb, &tag)) |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 181 | *err = -1; |
| 182 | else |
| 183 | dst->value = tag; |
| 184 | } |
| 185 | |
| 186 | |
| 187 | |
| 188 | /************************************************************************** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | * skb attributes |
| 190 | **************************************************************************/ |
| 191 | |
| 192 | META_COLLECTOR(int_priority) |
| 193 | { |
| 194 | dst->value = skb->priority; |
| 195 | } |
| 196 | |
| 197 | META_COLLECTOR(int_protocol) |
| 198 | { |
| 199 | /* Let userspace take care of the byte ordering */ |
| 200 | dst->value = skb->protocol; |
| 201 | } |
| 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | META_COLLECTOR(int_pkttype) |
| 204 | { |
| 205 | dst->value = skb->pkt_type; |
| 206 | } |
| 207 | |
| 208 | META_COLLECTOR(int_pktlen) |
| 209 | { |
| 210 | dst->value = skb->len; |
| 211 | } |
| 212 | |
| 213 | META_COLLECTOR(int_datalen) |
| 214 | { |
| 215 | dst->value = skb->data_len; |
| 216 | } |
| 217 | |
| 218 | META_COLLECTOR(int_maclen) |
| 219 | { |
| 220 | dst->value = skb->mac_len; |
| 221 | } |
| 222 | |
Stephen Hemminger | c2e3143 | 2010-08-24 14:48:10 -0700 | [diff] [blame] | 223 | META_COLLECTOR(int_rxhash) |
| 224 | { |
Tom Herbert | 3958afa1b | 2013-12-15 22:12:06 -0800 | [diff] [blame] | 225 | dst->value = skb_get_hash(skb); |
Stephen Hemminger | c2e3143 | 2010-08-24 14:48:10 -0700 | [diff] [blame] | 226 | } |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | /************************************************************************** |
| 229 | * Netfilter |
| 230 | **************************************************************************/ |
| 231 | |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 232 | META_COLLECTOR(int_mark) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 234 | dst->value = skb->mark; |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 235 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
| 237 | /************************************************************************** |
| 238 | * Traffic Control |
| 239 | **************************************************************************/ |
| 240 | |
| 241 | META_COLLECTOR(int_tcindex) |
| 242 | { |
| 243 | dst->value = skb->tc_index; |
| 244 | } |
| 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | /************************************************************************** |
| 247 | * Routing |
| 248 | **************************************************************************/ |
| 249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | META_COLLECTOR(int_rtclassid) |
| 251 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 252 | if (unlikely(skb_dst(skb) == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | *err = -1; |
| 254 | else |
Patrick McHardy | c7066f7 | 2011-01-14 13:36:42 +0100 | [diff] [blame] | 255 | #ifdef CONFIG_IP_ROUTE_CLASSID |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 256 | dst->value = skb_dst(skb)->tclassid; |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 257 | #else |
| 258 | dst->value = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | #endif |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 260 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | META_COLLECTOR(int_rtiif) |
| 263 | { |
Eric Dumazet | 511c3f9 | 2009-06-02 05:14:27 +0000 | [diff] [blame] | 264 | if (unlikely(skb_rtable(skb) == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | *err = -1; |
| 266 | else |
David S. Miller | 92101b3 | 2012-07-23 16:29:00 -0700 | [diff] [blame] | 267 | dst->value = inet_iif(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | /************************************************************************** |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 271 | * Socket Attributes |
| 272 | **************************************************************************/ |
| 273 | |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 274 | #define skip_nonlocal(skb) \ |
| 275 | (unlikely(skb->sk == NULL)) |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 276 | |
| 277 | META_COLLECTOR(int_sk_family) |
| 278 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 279 | if (skip_nonlocal(skb)) { |
| 280 | *err = -1; |
| 281 | return; |
| 282 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 283 | dst->value = skb->sk->sk_family; |
| 284 | } |
| 285 | |
| 286 | META_COLLECTOR(int_sk_state) |
| 287 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 288 | if (skip_nonlocal(skb)) { |
| 289 | *err = -1; |
| 290 | return; |
| 291 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 292 | dst->value = skb->sk->sk_state; |
| 293 | } |
| 294 | |
| 295 | META_COLLECTOR(int_sk_reuse) |
| 296 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 297 | if (skip_nonlocal(skb)) { |
| 298 | *err = -1; |
| 299 | return; |
| 300 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 301 | dst->value = skb->sk->sk_reuse; |
| 302 | } |
| 303 | |
| 304 | META_COLLECTOR(int_sk_bound_if) |
| 305 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 306 | if (skip_nonlocal(skb)) { |
| 307 | *err = -1; |
| 308 | return; |
| 309 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 310 | /* No error if bound_dev_if is 0, legal userspace check */ |
| 311 | dst->value = skb->sk->sk_bound_dev_if; |
| 312 | } |
| 313 | |
| 314 | META_COLLECTOR(var_sk_bound_if) |
| 315 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 316 | if (skip_nonlocal(skb)) { |
| 317 | *err = -1; |
| 318 | return; |
| 319 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 320 | |
Eric Dumazet | d007563 | 2009-11-04 05:23:31 -0800 | [diff] [blame] | 321 | if (skb->sk->sk_bound_dev_if == 0) { |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 322 | dst->value = (unsigned long) "any"; |
| 323 | dst->len = 3; |
Eric Dumazet | d007563 | 2009-11-04 05:23:31 -0800 | [diff] [blame] | 324 | } else { |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 325 | struct net_device *dev; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 326 | |
Eric Dumazet | d007563 | 2009-11-04 05:23:31 -0800 | [diff] [blame] | 327 | rcu_read_lock(); |
Eric Dumazet | 2939e27 | 2009-11-18 23:24:41 -0800 | [diff] [blame] | 328 | dev = dev_get_by_index_rcu(sock_net(skb->sk), |
| 329 | skb->sk->sk_bound_dev_if); |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 330 | *err = var_dev(dev, dst); |
Eric Dumazet | d007563 | 2009-11-04 05:23:31 -0800 | [diff] [blame] | 331 | rcu_read_unlock(); |
| 332 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | META_COLLECTOR(int_sk_refcnt) |
| 336 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 337 | if (skip_nonlocal(skb)) { |
| 338 | *err = -1; |
| 339 | return; |
| 340 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 341 | dst->value = atomic_read(&skb->sk->sk_refcnt); |
| 342 | } |
| 343 | |
| 344 | META_COLLECTOR(int_sk_rcvbuf) |
| 345 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 346 | if (skip_nonlocal(skb)) { |
| 347 | *err = -1; |
| 348 | return; |
| 349 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 350 | dst->value = skb->sk->sk_rcvbuf; |
| 351 | } |
| 352 | |
| 353 | META_COLLECTOR(int_sk_shutdown) |
| 354 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 355 | if (skip_nonlocal(skb)) { |
| 356 | *err = -1; |
| 357 | return; |
| 358 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 359 | dst->value = skb->sk->sk_shutdown; |
| 360 | } |
| 361 | |
| 362 | META_COLLECTOR(int_sk_proto) |
| 363 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 364 | if (skip_nonlocal(skb)) { |
| 365 | *err = -1; |
| 366 | return; |
| 367 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 368 | dst->value = skb->sk->sk_protocol; |
| 369 | } |
| 370 | |
| 371 | META_COLLECTOR(int_sk_type) |
| 372 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 373 | if (skip_nonlocal(skb)) { |
| 374 | *err = -1; |
| 375 | return; |
| 376 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 377 | dst->value = skb->sk->sk_type; |
| 378 | } |
| 379 | |
| 380 | META_COLLECTOR(int_sk_rmem_alloc) |
| 381 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 382 | if (skip_nonlocal(skb)) { |
| 383 | *err = -1; |
| 384 | return; |
| 385 | } |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 386 | dst->value = sk_rmem_alloc_get(skb->sk); |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | META_COLLECTOR(int_sk_wmem_alloc) |
| 390 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 391 | if (skip_nonlocal(skb)) { |
| 392 | *err = -1; |
| 393 | return; |
| 394 | } |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 395 | dst->value = sk_wmem_alloc_get(skb->sk); |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | META_COLLECTOR(int_sk_omem_alloc) |
| 399 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 400 | if (skip_nonlocal(skb)) { |
| 401 | *err = -1; |
| 402 | return; |
| 403 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 404 | dst->value = atomic_read(&skb->sk->sk_omem_alloc); |
| 405 | } |
| 406 | |
| 407 | META_COLLECTOR(int_sk_rcv_qlen) |
| 408 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 409 | if (skip_nonlocal(skb)) { |
| 410 | *err = -1; |
| 411 | return; |
| 412 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 413 | dst->value = skb->sk->sk_receive_queue.qlen; |
| 414 | } |
| 415 | |
| 416 | META_COLLECTOR(int_sk_snd_qlen) |
| 417 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 418 | if (skip_nonlocal(skb)) { |
| 419 | *err = -1; |
| 420 | return; |
| 421 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 422 | dst->value = skb->sk->sk_write_queue.qlen; |
| 423 | } |
| 424 | |
| 425 | META_COLLECTOR(int_sk_wmem_queued) |
| 426 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 427 | if (skip_nonlocal(skb)) { |
| 428 | *err = -1; |
| 429 | return; |
| 430 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 431 | dst->value = skb->sk->sk_wmem_queued; |
| 432 | } |
| 433 | |
| 434 | META_COLLECTOR(int_sk_fwd_alloc) |
| 435 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 436 | if (skip_nonlocal(skb)) { |
| 437 | *err = -1; |
| 438 | return; |
| 439 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 440 | dst->value = skb->sk->sk_forward_alloc; |
| 441 | } |
| 442 | |
| 443 | META_COLLECTOR(int_sk_sndbuf) |
| 444 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 445 | if (skip_nonlocal(skb)) { |
| 446 | *err = -1; |
| 447 | return; |
| 448 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 449 | dst->value = skb->sk->sk_sndbuf; |
| 450 | } |
| 451 | |
| 452 | META_COLLECTOR(int_sk_alloc) |
| 453 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 454 | if (skip_nonlocal(skb)) { |
| 455 | *err = -1; |
| 456 | return; |
| 457 | } |
stephen hemminger | e0c5631 | 2011-02-23 09:06:52 +0000 | [diff] [blame] | 458 | dst->value = (__force int) skb->sk->sk_allocation; |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 459 | } |
| 460 | |
Eric Dumazet | 81c3d54 | 2005-10-03 14:13:38 -0700 | [diff] [blame] | 461 | META_COLLECTOR(int_sk_hash) |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 462 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 463 | if (skip_nonlocal(skb)) { |
| 464 | *err = -1; |
| 465 | return; |
| 466 | } |
Eric Dumazet | 81c3d54 | 2005-10-03 14:13:38 -0700 | [diff] [blame] | 467 | dst->value = skb->sk->sk_hash; |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | META_COLLECTOR(int_sk_lingertime) |
| 471 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 472 | if (skip_nonlocal(skb)) { |
| 473 | *err = -1; |
| 474 | return; |
| 475 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 476 | dst->value = skb->sk->sk_lingertime / HZ; |
| 477 | } |
| 478 | |
| 479 | META_COLLECTOR(int_sk_err_qlen) |
| 480 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 481 | if (skip_nonlocal(skb)) { |
| 482 | *err = -1; |
| 483 | return; |
| 484 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 485 | dst->value = skb->sk->sk_error_queue.qlen; |
| 486 | } |
| 487 | |
| 488 | META_COLLECTOR(int_sk_ack_bl) |
| 489 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 490 | if (skip_nonlocal(skb)) { |
| 491 | *err = -1; |
| 492 | return; |
| 493 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 494 | dst->value = skb->sk->sk_ack_backlog; |
| 495 | } |
| 496 | |
| 497 | META_COLLECTOR(int_sk_max_ack_bl) |
| 498 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 499 | if (skip_nonlocal(skb)) { |
| 500 | *err = -1; |
| 501 | return; |
| 502 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 503 | dst->value = skb->sk->sk_max_ack_backlog; |
| 504 | } |
| 505 | |
| 506 | META_COLLECTOR(int_sk_prio) |
| 507 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 508 | if (skip_nonlocal(skb)) { |
| 509 | *err = -1; |
| 510 | return; |
| 511 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 512 | dst->value = skb->sk->sk_priority; |
| 513 | } |
| 514 | |
| 515 | META_COLLECTOR(int_sk_rcvlowat) |
| 516 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 517 | if (skip_nonlocal(skb)) { |
| 518 | *err = -1; |
| 519 | return; |
| 520 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 521 | dst->value = skb->sk->sk_rcvlowat; |
| 522 | } |
| 523 | |
| 524 | META_COLLECTOR(int_sk_rcvtimeo) |
| 525 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 526 | if (skip_nonlocal(skb)) { |
| 527 | *err = -1; |
| 528 | return; |
| 529 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 530 | dst->value = skb->sk->sk_rcvtimeo / HZ; |
| 531 | } |
| 532 | |
| 533 | META_COLLECTOR(int_sk_sndtimeo) |
| 534 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 535 | if (skip_nonlocal(skb)) { |
| 536 | *err = -1; |
| 537 | return; |
| 538 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 539 | dst->value = skb->sk->sk_sndtimeo / HZ; |
| 540 | } |
| 541 | |
| 542 | META_COLLECTOR(int_sk_sendmsg_off) |
| 543 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 544 | if (skip_nonlocal(skb)) { |
| 545 | *err = -1; |
| 546 | return; |
| 547 | } |
Eric Dumazet | 5640f76 | 2012-09-23 23:04:42 +0000 | [diff] [blame] | 548 | dst->value = skb->sk->sk_frag.offset; |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | META_COLLECTOR(int_sk_write_pend) |
| 552 | { |
Yang Yingliang | 4f8f61e | 2013-12-11 15:17:11 +0800 | [diff] [blame] | 553 | if (skip_nonlocal(skb)) { |
| 554 | *err = -1; |
| 555 | return; |
| 556 | } |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 557 | dst->value = skb->sk->sk_write_pending; |
| 558 | } |
| 559 | |
| 560 | /************************************************************************** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | * Meta value collectors assignment table |
| 562 | **************************************************************************/ |
| 563 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 564 | struct meta_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | void (*get)(struct sk_buff *, struct tcf_pkt_info *, |
| 566 | struct meta_value *, struct meta_obj *, int *); |
| 567 | }; |
| 568 | |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 569 | #define META_ID(name) TCF_META_ID_##name |
| 570 | #define META_FUNC(name) { .get = meta_##name } |
| 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | /* Meta value operations table listing all meta value collectors and |
| 573 | * assigns them to a type and meta id. */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 574 | static struct meta_ops __meta_ops[TCF_META_TYPE_MAX + 1][TCF_META_ID_MAX + 1] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | [TCF_META_TYPE_VAR] = { |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 576 | [META_ID(DEV)] = META_FUNC(var_dev), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 577 | [META_ID(SK_BOUND_IF)] = META_FUNC(var_sk_bound_if), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | }, |
| 579 | [TCF_META_TYPE_INT] = { |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 580 | [META_ID(RANDOM)] = META_FUNC(int_random), |
| 581 | [META_ID(LOADAVG_0)] = META_FUNC(int_loadavg_0), |
| 582 | [META_ID(LOADAVG_1)] = META_FUNC(int_loadavg_1), |
| 583 | [META_ID(LOADAVG_2)] = META_FUNC(int_loadavg_2), |
| 584 | [META_ID(DEV)] = META_FUNC(int_dev), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 585 | [META_ID(PRIORITY)] = META_FUNC(int_priority), |
| 586 | [META_ID(PROTOCOL)] = META_FUNC(int_protocol), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 587 | [META_ID(PKTTYPE)] = META_FUNC(int_pkttype), |
| 588 | [META_ID(PKTLEN)] = META_FUNC(int_pktlen), |
| 589 | [META_ID(DATALEN)] = META_FUNC(int_datalen), |
| 590 | [META_ID(MACLEN)] = META_FUNC(int_maclen), |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 591 | [META_ID(NFMARK)] = META_FUNC(int_mark), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 592 | [META_ID(TCINDEX)] = META_FUNC(int_tcindex), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 593 | [META_ID(RTCLASSID)] = META_FUNC(int_rtclassid), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 594 | [META_ID(RTIIF)] = META_FUNC(int_rtiif), |
| 595 | [META_ID(SK_FAMILY)] = META_FUNC(int_sk_family), |
| 596 | [META_ID(SK_STATE)] = META_FUNC(int_sk_state), |
| 597 | [META_ID(SK_REUSE)] = META_FUNC(int_sk_reuse), |
| 598 | [META_ID(SK_BOUND_IF)] = META_FUNC(int_sk_bound_if), |
| 599 | [META_ID(SK_REFCNT)] = META_FUNC(int_sk_refcnt), |
| 600 | [META_ID(SK_RCVBUF)] = META_FUNC(int_sk_rcvbuf), |
| 601 | [META_ID(SK_SNDBUF)] = META_FUNC(int_sk_sndbuf), |
| 602 | [META_ID(SK_SHUTDOWN)] = META_FUNC(int_sk_shutdown), |
| 603 | [META_ID(SK_PROTO)] = META_FUNC(int_sk_proto), |
| 604 | [META_ID(SK_TYPE)] = META_FUNC(int_sk_type), |
| 605 | [META_ID(SK_RMEM_ALLOC)] = META_FUNC(int_sk_rmem_alloc), |
| 606 | [META_ID(SK_WMEM_ALLOC)] = META_FUNC(int_sk_wmem_alloc), |
| 607 | [META_ID(SK_OMEM_ALLOC)] = META_FUNC(int_sk_omem_alloc), |
| 608 | [META_ID(SK_WMEM_QUEUED)] = META_FUNC(int_sk_wmem_queued), |
| 609 | [META_ID(SK_RCV_QLEN)] = META_FUNC(int_sk_rcv_qlen), |
| 610 | [META_ID(SK_SND_QLEN)] = META_FUNC(int_sk_snd_qlen), |
| 611 | [META_ID(SK_ERR_QLEN)] = META_FUNC(int_sk_err_qlen), |
| 612 | [META_ID(SK_FORWARD_ALLOCS)] = META_FUNC(int_sk_fwd_alloc), |
| 613 | [META_ID(SK_ALLOCS)] = META_FUNC(int_sk_alloc), |
Eric Dumazet | 81c3d54 | 2005-10-03 14:13:38 -0700 | [diff] [blame] | 614 | [META_ID(SK_HASH)] = META_FUNC(int_sk_hash), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 615 | [META_ID(SK_LINGERTIME)] = META_FUNC(int_sk_lingertime), |
| 616 | [META_ID(SK_ACK_BACKLOG)] = META_FUNC(int_sk_ack_bl), |
| 617 | [META_ID(SK_MAX_ACK_BACKLOG)] = META_FUNC(int_sk_max_ack_bl), |
| 618 | [META_ID(SK_PRIO)] = META_FUNC(int_sk_prio), |
| 619 | [META_ID(SK_RCVLOWAT)] = META_FUNC(int_sk_rcvlowat), |
| 620 | [META_ID(SK_RCVTIMEO)] = META_FUNC(int_sk_rcvtimeo), |
| 621 | [META_ID(SK_SNDTIMEO)] = META_FUNC(int_sk_sndtimeo), |
| 622 | [META_ID(SK_SENDMSG_OFF)] = META_FUNC(int_sk_sendmsg_off), |
| 623 | [META_ID(SK_WRITE_PENDING)] = META_FUNC(int_sk_write_pend), |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 624 | [META_ID(VLAN_TAG)] = META_FUNC(int_vlan_tag), |
Stephen Hemminger | c2e3143 | 2010-08-24 14:48:10 -0700 | [diff] [blame] | 625 | [META_ID(RXHASH)] = META_FUNC(int_rxhash), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | }; |
| 628 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 629 | static inline struct meta_ops *meta_ops(struct meta_value *val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
| 631 | return &__meta_ops[meta_type(val)][meta_id(val)]; |
| 632 | } |
| 633 | |
| 634 | /************************************************************************** |
| 635 | * Type specific operations for TCF_META_TYPE_VAR |
| 636 | **************************************************************************/ |
| 637 | |
| 638 | static int meta_var_compare(struct meta_obj *a, struct meta_obj *b) |
| 639 | { |
| 640 | int r = a->len - b->len; |
| 641 | |
| 642 | if (r == 0) |
| 643 | r = memcmp((void *) a->value, (void *) b->value, a->len); |
| 644 | |
| 645 | return r; |
| 646 | } |
| 647 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 648 | static int meta_var_change(struct meta_value *dst, struct nlattr *nla) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 650 | int len = nla_len(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 652 | dst->val = (unsigned long)kmemdup(nla_data(nla), len, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | if (dst->val == 0UL) |
| 654 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | dst->len = len; |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | static void meta_var_destroy(struct meta_value *v) |
| 660 | { |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 661 | kfree((void *) v->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | static void meta_var_apply_extras(struct meta_value *v, |
| 665 | struct meta_obj *dst) |
| 666 | { |
| 667 | int shift = v->hdr.shift; |
| 668 | |
| 669 | if (shift && shift < dst->len) |
| 670 | dst->len -= shift; |
| 671 | } |
| 672 | |
| 673 | static int meta_var_dump(struct sk_buff *skb, struct meta_value *v, int tlv) |
| 674 | { |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 675 | if (v->val && v->len && |
| 676 | nla_put(skb, tlv, v->len, (void *) v->val)) |
| 677 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | return 0; |
| 679 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 680 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | return -1; |
| 682 | } |
| 683 | |
| 684 | /************************************************************************** |
| 685 | * Type specific operations for TCF_META_TYPE_INT |
| 686 | **************************************************************************/ |
| 687 | |
| 688 | static int meta_int_compare(struct meta_obj *a, struct meta_obj *b) |
| 689 | { |
| 690 | /* Let gcc optimize it, the unlikely is not really based on |
| 691 | * some numbers but jump free code for mismatches seems |
| 692 | * more logical. */ |
Thomas Graf | 98e5640 | 2005-06-08 15:11:19 -0700 | [diff] [blame] | 693 | if (unlikely(a->value == b->value)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | return 0; |
Thomas Graf | 98e5640 | 2005-06-08 15:11:19 -0700 | [diff] [blame] | 695 | else if (a->value < b->value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return -1; |
| 697 | else |
| 698 | return 1; |
| 699 | } |
| 700 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 701 | static int meta_int_change(struct meta_value *dst, struct nlattr *nla) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 703 | if (nla_len(nla) >= sizeof(unsigned long)) { |
| 704 | dst->val = *(unsigned long *) nla_data(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | dst->len = sizeof(unsigned long); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 706 | } else if (nla_len(nla) == sizeof(u32)) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 707 | dst->val = nla_get_u32(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | dst->len = sizeof(u32); |
| 709 | } else |
| 710 | return -EINVAL; |
| 711 | |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | static void meta_int_apply_extras(struct meta_value *v, |
| 716 | struct meta_obj *dst) |
| 717 | { |
| 718 | if (v->hdr.shift) |
| 719 | dst->value >>= v->hdr.shift; |
| 720 | |
| 721 | if (v->val) |
| 722 | dst->value &= v->val; |
| 723 | } |
| 724 | |
| 725 | static int meta_int_dump(struct sk_buff *skb, struct meta_value *v, int tlv) |
| 726 | { |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 727 | if (v->len == sizeof(unsigned long)) { |
| 728 | if (nla_put(skb, tlv, sizeof(unsigned long), &v->val)) |
| 729 | goto nla_put_failure; |
| 730 | } else if (v->len == sizeof(u32)) { |
| 731 | if (nla_put_u32(skb, tlv, v->val)) |
| 732 | goto nla_put_failure; |
| 733 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
| 735 | return 0; |
| 736 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 737 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | return -1; |
| 739 | } |
| 740 | |
| 741 | /************************************************************************** |
| 742 | * Type specific operations table |
| 743 | **************************************************************************/ |
| 744 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 745 | struct meta_type_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | void (*destroy)(struct meta_value *); |
| 747 | int (*compare)(struct meta_obj *, struct meta_obj *); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 748 | int (*change)(struct meta_value *, struct nlattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | void (*apply_extras)(struct meta_value *, struct meta_obj *); |
| 750 | int (*dump)(struct sk_buff *, struct meta_value *, int); |
| 751 | }; |
| 752 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 753 | static struct meta_type_ops __meta_type_ops[TCF_META_TYPE_MAX + 1] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | [TCF_META_TYPE_VAR] = { |
| 755 | .destroy = meta_var_destroy, |
| 756 | .compare = meta_var_compare, |
| 757 | .change = meta_var_change, |
| 758 | .apply_extras = meta_var_apply_extras, |
| 759 | .dump = meta_var_dump |
| 760 | }, |
| 761 | [TCF_META_TYPE_INT] = { |
| 762 | .compare = meta_int_compare, |
| 763 | .change = meta_int_change, |
| 764 | .apply_extras = meta_int_apply_extras, |
| 765 | .dump = meta_int_dump |
| 766 | } |
| 767 | }; |
| 768 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 769 | static inline struct meta_type_ops *meta_type_ops(struct meta_value *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | { |
| 771 | return &__meta_type_ops[meta_type(v)]; |
| 772 | } |
| 773 | |
| 774 | /************************************************************************** |
| 775 | * Core |
| 776 | **************************************************************************/ |
| 777 | |
Stephen Hemminger | ed7af3b | 2008-02-09 23:26:17 -0800 | [diff] [blame] | 778 | static int meta_get(struct sk_buff *skb, struct tcf_pkt_info *info, |
| 779 | struct meta_value *v, struct meta_obj *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | { |
| 781 | int err = 0; |
| 782 | |
| 783 | if (meta_id(v) == TCF_META_ID_VALUE) { |
| 784 | dst->value = v->val; |
| 785 | dst->len = v->len; |
| 786 | return 0; |
| 787 | } |
| 788 | |
| 789 | meta_ops(v)->get(skb, info, v, dst, &err); |
| 790 | if (err < 0) |
| 791 | return err; |
| 792 | |
| 793 | if (meta_type_ops(v)->apply_extras) |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 794 | meta_type_ops(v)->apply_extras(v, dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
| 796 | return 0; |
| 797 | } |
| 798 | |
| 799 | static int em_meta_match(struct sk_buff *skb, struct tcf_ematch *m, |
| 800 | struct tcf_pkt_info *info) |
| 801 | { |
| 802 | int r; |
| 803 | struct meta_match *meta = (struct meta_match *) m->data; |
| 804 | struct meta_obj l_value, r_value; |
| 805 | |
| 806 | if (meta_get(skb, info, &meta->lvalue, &l_value) < 0 || |
| 807 | meta_get(skb, info, &meta->rvalue, &r_value) < 0) |
| 808 | return 0; |
| 809 | |
| 810 | r = meta_type_ops(&meta->lvalue)->compare(&l_value, &r_value); |
| 811 | |
| 812 | switch (meta->lvalue.hdr.op) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 813 | case TCF_EM_OPND_EQ: |
| 814 | return !r; |
| 815 | case TCF_EM_OPND_LT: |
| 816 | return r < 0; |
| 817 | case TCF_EM_OPND_GT: |
| 818 | return r > 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | return 0; |
| 822 | } |
| 823 | |
Stephen Hemminger | ed7af3b | 2008-02-09 23:26:17 -0800 | [diff] [blame] | 824 | static void meta_delete(struct meta_match *meta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | { |
Stephen Hemminger | 04f217a | 2008-02-07 18:13:00 -0800 | [diff] [blame] | 826 | if (meta) { |
| 827 | struct meta_type_ops *ops = meta_type_ops(&meta->lvalue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Stephen Hemminger | 04f217a | 2008-02-07 18:13:00 -0800 | [diff] [blame] | 829 | if (ops && ops->destroy) { |
| 830 | ops->destroy(&meta->lvalue); |
| 831 | ops->destroy(&meta->rvalue); |
| 832 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | kfree(meta); |
| 836 | } |
| 837 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 838 | static inline int meta_change_data(struct meta_value *dst, struct nlattr *nla) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 840 | if (nla) { |
| 841 | if (nla_len(nla) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | return -EINVAL; |
| 843 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 844 | return meta_type_ops(dst)->change(dst, nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | static inline int meta_is_supported(struct meta_value *val) |
| 851 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 852 | return !meta_id(val) || meta_ops(val)->get; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
| 854 | |
Patrick McHardy | 7a9c1bd | 2008-01-23 20:36:45 -0800 | [diff] [blame] | 855 | static const struct nla_policy meta_policy[TCA_EM_META_MAX + 1] = { |
| 856 | [TCA_EM_META_HDR] = { .len = sizeof(struct tcf_meta_hdr) }, |
| 857 | }; |
| 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | static int em_meta_change(struct tcf_proto *tp, void *data, int len, |
| 860 | struct tcf_ematch *m) |
| 861 | { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 862 | int err; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 863 | struct nlattr *tb[TCA_EM_META_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | struct tcf_meta_hdr *hdr; |
| 865 | struct meta_match *meta = NULL; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 866 | |
Patrick McHardy | 7a9c1bd | 2008-01-23 20:36:45 -0800 | [diff] [blame] | 867 | err = nla_parse(tb, TCA_EM_META_MAX, data, len, meta_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 868 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | goto errout; |
| 870 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 871 | err = -EINVAL; |
Patrick McHardy | 7a9c1bd | 2008-01-23 20:36:45 -0800 | [diff] [blame] | 872 | if (tb[TCA_EM_META_HDR] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | goto errout; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 874 | hdr = nla_data(tb[TCA_EM_META_HDR]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
| 876 | if (TCF_META_TYPE(hdr->left.kind) != TCF_META_TYPE(hdr->right.kind) || |
| 877 | TCF_META_TYPE(hdr->left.kind) > TCF_META_TYPE_MAX || |
| 878 | TCF_META_ID(hdr->left.kind) > TCF_META_ID_MAX || |
| 879 | TCF_META_ID(hdr->right.kind) > TCF_META_ID_MAX) |
| 880 | goto errout; |
| 881 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 882 | meta = kzalloc(sizeof(*meta), GFP_KERNEL); |
stephen hemminger | 0c4e402 | 2013-09-26 17:40:11 -0700 | [diff] [blame] | 883 | if (meta == NULL) { |
| 884 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | goto errout; |
stephen hemminger | 0c4e402 | 2013-09-26 17:40:11 -0700 | [diff] [blame] | 886 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | |
| 888 | memcpy(&meta->lvalue.hdr, &hdr->left, sizeof(hdr->left)); |
| 889 | memcpy(&meta->rvalue.hdr, &hdr->right, sizeof(hdr->right)); |
| 890 | |
| 891 | if (!meta_is_supported(&meta->lvalue) || |
| 892 | !meta_is_supported(&meta->rvalue)) { |
| 893 | err = -EOPNOTSUPP; |
| 894 | goto errout; |
| 895 | } |
| 896 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 897 | if (meta_change_data(&meta->lvalue, tb[TCA_EM_META_LVALUE]) < 0 || |
| 898 | meta_change_data(&meta->rvalue, tb[TCA_EM_META_RVALUE]) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | goto errout; |
| 900 | |
| 901 | m->datalen = sizeof(*meta); |
| 902 | m->data = (unsigned long) meta; |
| 903 | |
| 904 | err = 0; |
| 905 | errout: |
| 906 | if (err && meta) |
| 907 | meta_delete(meta); |
| 908 | return err; |
| 909 | } |
| 910 | |
| 911 | static void em_meta_destroy(struct tcf_proto *tp, struct tcf_ematch *m) |
| 912 | { |
| 913 | if (m) |
| 914 | meta_delete((struct meta_match *) m->data); |
| 915 | } |
| 916 | |
| 917 | static int em_meta_dump(struct sk_buff *skb, struct tcf_ematch *em) |
| 918 | { |
| 919 | struct meta_match *meta = (struct meta_match *) em->data; |
| 920 | struct tcf_meta_hdr hdr; |
| 921 | struct meta_type_ops *ops; |
| 922 | |
| 923 | memset(&hdr, 0, sizeof(hdr)); |
| 924 | memcpy(&hdr.left, &meta->lvalue.hdr, sizeof(hdr.left)); |
| 925 | memcpy(&hdr.right, &meta->rvalue.hdr, sizeof(hdr.right)); |
| 926 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 927 | if (nla_put(skb, TCA_EM_META_HDR, sizeof(hdr), &hdr)) |
| 928 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | ops = meta_type_ops(&meta->lvalue); |
| 931 | if (ops->dump(skb, &meta->lvalue, TCA_EM_META_LVALUE) < 0 || |
| 932 | ops->dump(skb, &meta->rvalue, TCA_EM_META_RVALUE) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 933 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
| 935 | return 0; |
| 936 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 937 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | return -1; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 939 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
| 941 | static struct tcf_ematch_ops em_meta_ops = { |
| 942 | .kind = TCF_EM_META, |
| 943 | .change = em_meta_change, |
| 944 | .match = em_meta_match, |
| 945 | .destroy = em_meta_destroy, |
| 946 | .dump = em_meta_dump, |
| 947 | .owner = THIS_MODULE, |
| 948 | .link = LIST_HEAD_INIT(em_meta_ops.link) |
| 949 | }; |
| 950 | |
| 951 | static int __init init_em_meta(void) |
| 952 | { |
| 953 | return tcf_em_register(&em_meta_ops); |
| 954 | } |
| 955 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 956 | static void __exit exit_em_meta(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | { |
| 958 | tcf_em_unregister(&em_meta_ops); |
| 959 | } |
| 960 | |
| 961 | MODULE_LICENSE("GPL"); |
| 962 | |
| 963 | module_init(init_em_meta); |
| 964 | module_exit(exit_em_meta); |
Patrick McHardy | db3d99c | 2007-07-11 19:46:26 -0700 | [diff] [blame] | 965 | |
| 966 | MODULE_ALIAS_TCF_EMATCH(TCF_EM_META); |