diff options
Diffstat (limited to 'net/ipv4/fib_frontend.c')
| -rw-r--r-- | net/ipv4/fib_frontend.c | 492 |
1 files changed, 375 insertions, 117 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 31387abf53a2..9c399a70dd5d 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c | |||
| @@ -15,7 +15,6 @@ | |||
| 15 | * 2 of the License, or (at your option) any later version. | 15 | * 2 of the License, or (at your option) any later version. |
| 16 | */ | 16 | */ |
| 17 | 17 | ||
| 18 | #include <linux/config.h> | ||
| 19 | #include <linux/module.h> | 18 | #include <linux/module.h> |
| 20 | #include <asm/uaccess.h> | 19 | #include <asm/uaccess.h> |
| 21 | #include <asm/system.h> | 20 | #include <asm/system.h> |
| @@ -33,10 +32,12 @@ | |||
| 33 | #include <linux/inet.h> | 32 | #include <linux/inet.h> |
| 34 | #include <linux/inetdevice.h> | 33 | #include <linux/inetdevice.h> |
| 35 | #include <linux/netdevice.h> | 34 | #include <linux/netdevice.h> |
| 35 | #include <linux/if_addr.h> | ||
| 36 | #include <linux/if_arp.h> | 36 | #include <linux/if_arp.h> |
| 37 | #include <linux/skbuff.h> | 37 | #include <linux/skbuff.h> |
| 38 | #include <linux/netlink.h> | 38 | #include <linux/netlink.h> |
| 39 | #include <linux/init.h> | 39 | #include <linux/init.h> |
| 40 | #include <linux/list.h> | ||
| 40 | 41 | ||
| 41 | #include <net/ip.h> | 42 | #include <net/ip.h> |
| 42 | #include <net/protocol.h> | 43 | #include <net/protocol.h> |
| @@ -51,48 +52,67 @@ | |||
| 51 | 52 | ||
| 52 | #ifndef CONFIG_IP_MULTIPLE_TABLES | 53 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
| 53 | 54 | ||
| 54 | #define RT_TABLE_MIN RT_TABLE_MAIN | ||
| 55 | |||
| 56 | struct fib_table *ip_fib_local_table; | 55 | struct fib_table *ip_fib_local_table; |
| 57 | struct fib_table *ip_fib_main_table; | 56 | struct fib_table *ip_fib_main_table; |
| 58 | 57 | ||
| 59 | #else | 58 | #define FIB_TABLE_HASHSZ 1 |
| 59 | static struct hlist_head fib_table_hash[FIB_TABLE_HASHSZ]; | ||
| 60 | 60 | ||
| 61 | #define RT_TABLE_MIN 1 | 61 | #else |
| 62 | 62 | ||
| 63 | struct fib_table *fib_tables[RT_TABLE_MAX+1]; | 63 | #define FIB_TABLE_HASHSZ 256 |
| 64 | static struct hlist_head fib_table_hash[FIB_TABLE_HASHSZ]; | ||
| 64 | 65 | ||
| 65 | struct fib_table *__fib_new_table(int id) | 66 | struct fib_table *fib_new_table(u32 id) |
| 66 | { | 67 | { |
| 67 | struct fib_table *tb; | 68 | struct fib_table *tb; |
| 69 | unsigned int h; | ||
| 68 | 70 | ||
| 71 | if (id == 0) | ||
| 72 | id = RT_TABLE_MAIN; | ||
| 73 | tb = fib_get_table(id); | ||
| 74 | if (tb) | ||
| 75 | return tb; | ||
| 69 | tb = fib_hash_init(id); | 76 | tb = fib_hash_init(id); |
| 70 | if (!tb) | 77 | if (!tb) |
| 71 | return NULL; | 78 | return NULL; |
| 72 | fib_tables[id] = tb; | 79 | h = id & (FIB_TABLE_HASHSZ - 1); |
| 80 | hlist_add_head_rcu(&tb->tb_hlist, &fib_table_hash[h]); | ||
| 73 | return tb; | 81 | return tb; |
| 74 | } | 82 | } |
| 75 | 83 | ||
| 84 | struct fib_table *fib_get_table(u32 id) | ||
| 85 | { | ||
| 86 | struct fib_table *tb; | ||
| 87 | struct hlist_node *node; | ||
| 88 | unsigned int h; | ||
| 76 | 89 | ||
| 90 | if (id == 0) | ||
| 91 | id = RT_TABLE_MAIN; | ||
| 92 | h = id & (FIB_TABLE_HASHSZ - 1); | ||
| 93 | rcu_read_lock(); | ||
| 94 | hlist_for_each_entry_rcu(tb, node, &fib_table_hash[h], tb_hlist) { | ||
| 95 | if (tb->tb_id == id) { | ||
| 96 | rcu_read_unlock(); | ||
| 97 | return tb; | ||
| 98 | } | ||
| 99 | } | ||
| 100 | rcu_read_unlock(); | ||
| 101 | return NULL; | ||
| 102 | } | ||
| 77 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ | 103 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
| 78 | 104 | ||
| 79 | |||
| 80 | static void fib_flush(void) | 105 | static void fib_flush(void) |
| 81 | { | 106 | { |
| 82 | int flushed = 0; | 107 | int flushed = 0; |
| 83 | #ifdef CONFIG_IP_MULTIPLE_TABLES | ||
| 84 | struct fib_table *tb; | 108 | struct fib_table *tb; |
| 85 | int id; | 109 | struct hlist_node *node; |
| 110 | unsigned int h; | ||
| 86 | 111 | ||
| 87 | for (id = RT_TABLE_MAX; id>0; id--) { | 112 | for (h = 0; h < FIB_TABLE_HASHSZ; h++) { |
| 88 | if ((tb = fib_get_table(id))==NULL) | 113 | hlist_for_each_entry(tb, node, &fib_table_hash[h], tb_hlist) |
| 89 | continue; | 114 | flushed += tb->tb_flush(tb); |
| 90 | flushed += tb->tb_flush(tb); | ||
| 91 | } | 115 | } |
| 92 | #else /* CONFIG_IP_MULTIPLE_TABLES */ | ||
| 93 | flushed += ip_fib_main_table->tb_flush(ip_fib_main_table); | ||
| 94 | flushed += ip_fib_local_table->tb_flush(ip_fib_local_table); | ||
| 95 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ | ||
| 96 | 116 | ||
| 97 | if (flushed) | 117 | if (flushed) |
| 98 | rt_cache_flush(-1); | 118 | rt_cache_flush(-1); |
| @@ -102,7 +122,7 @@ static void fib_flush(void) | |||
| 102 | * Find the first device with a given source address. | 122 | * Find the first device with a given source address. |
| 103 | */ | 123 | */ |
| 104 | 124 | ||
| 105 | struct net_device * ip_dev_find(u32 addr) | 125 | struct net_device * ip_dev_find(__be32 addr) |
| 106 | { | 126 | { |
| 107 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | 127 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; |
| 108 | struct fib_result res; | 128 | struct fib_result res; |
| @@ -126,7 +146,7 @@ out: | |||
| 126 | return dev; | 146 | return dev; |
| 127 | } | 147 | } |
| 128 | 148 | ||
| 129 | unsigned inet_addr_type(u32 addr) | 149 | unsigned inet_addr_type(__be32 addr) |
| 130 | { | 150 | { |
| 131 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | 151 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; |
| 132 | struct fib_result res; | 152 | struct fib_result res; |
| @@ -160,8 +180,8 @@ unsigned inet_addr_type(u32 addr) | |||
| 160 | - check, that packet arrived from expected physical interface. | 180 | - check, that packet arrived from expected physical interface. |
| 161 | */ | 181 | */ |
| 162 | 182 | ||
| 163 | int fib_validate_source(u32 src, u32 dst, u8 tos, int oif, | 183 | int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, |
| 164 | struct net_device *dev, u32 *spec_dst, u32 *itag) | 184 | struct net_device *dev, __be32 *spec_dst, u32 *itag) |
| 165 | { | 185 | { |
| 166 | struct in_device *in_dev; | 186 | struct in_device *in_dev; |
| 167 | struct flowi fl = { .nl_u = { .ip4_u = | 187 | struct flowi fl = { .nl_u = { .ip4_u = |
| @@ -233,42 +253,190 @@ e_inval: | |||
| 233 | 253 | ||
| 234 | #ifndef CONFIG_IP_NOSIOCRT | 254 | #ifndef CONFIG_IP_NOSIOCRT |
| 235 | 255 | ||
| 256 | static inline __be32 sk_extract_addr(struct sockaddr *addr) | ||
| 257 | { | ||
| 258 | return ((struct sockaddr_in *) addr)->sin_addr.s_addr; | ||
| 259 | } | ||
| 260 | |||
| 261 | static int put_rtax(struct nlattr *mx, int len, int type, u32 value) | ||
| 262 | { | ||
| 263 | struct nlattr *nla; | ||
| 264 | |||
| 265 | nla = (struct nlattr *) ((char *) mx + len); | ||
| 266 | nla->nla_type = type; | ||
| 267 | nla->nla_len = nla_attr_size(4); | ||
| 268 | *(u32 *) nla_data(nla) = value; | ||
| 269 | |||
| 270 | return len + nla_total_size(4); | ||
| 271 | } | ||
| 272 | |||
| 273 | static int rtentry_to_fib_config(int cmd, struct rtentry *rt, | ||
| 274 | struct fib_config *cfg) | ||
| 275 | { | ||
| 276 | __be32 addr; | ||
| 277 | int plen; | ||
| 278 | |||
| 279 | memset(cfg, 0, sizeof(*cfg)); | ||
| 280 | |||
| 281 | if (rt->rt_dst.sa_family != AF_INET) | ||
| 282 | return -EAFNOSUPPORT; | ||
| 283 | |||
| 284 | /* | ||
| 285 | * Check mask for validity: | ||
| 286 | * a) it must be contiguous. | ||
| 287 | * b) destination must have all host bits clear. | ||
| 288 | * c) if application forgot to set correct family (AF_INET), | ||
| 289 | * reject request unless it is absolutely clear i.e. | ||
| 290 | * both family and mask are zero. | ||
| 291 | */ | ||
| 292 | plen = 32; | ||
| 293 | addr = sk_extract_addr(&rt->rt_dst); | ||
| 294 | if (!(rt->rt_flags & RTF_HOST)) { | ||
| 295 | __be32 mask = sk_extract_addr(&rt->rt_genmask); | ||
| 296 | |||
| 297 | if (rt->rt_genmask.sa_family != AF_INET) { | ||
| 298 | if (mask || rt->rt_genmask.sa_family) | ||
| 299 | return -EAFNOSUPPORT; | ||
| 300 | } | ||
| 301 | |||
| 302 | if (bad_mask(mask, addr)) | ||
| 303 | return -EINVAL; | ||
| 304 | |||
| 305 | plen = inet_mask_len(mask); | ||
| 306 | } | ||
| 307 | |||
| 308 | cfg->fc_dst_len = plen; | ||
| 309 | cfg->fc_dst = addr; | ||
| 310 | |||
| 311 | if (cmd != SIOCDELRT) { | ||
| 312 | cfg->fc_nlflags = NLM_F_CREATE; | ||
| 313 | cfg->fc_protocol = RTPROT_BOOT; | ||
| 314 | } | ||
| 315 | |||
| 316 | if (rt->rt_metric) | ||
| 317 | cfg->fc_priority = rt->rt_metric - 1; | ||
| 318 | |||
| 319 | if (rt->rt_flags & RTF_REJECT) { | ||
| 320 | cfg->fc_scope = RT_SCOPE_HOST; | ||
| 321 | cfg->fc_type = RTN_UNREACHABLE; | ||
| 322 | return 0; | ||
| 323 | } | ||
| 324 | |||
| 325 | cfg->fc_scope = RT_SCOPE_NOWHERE; | ||
| 326 | cfg->fc_type = RTN_UNICAST; | ||
| 327 | |||
| 328 | if (rt->rt_dev) { | ||
| 329 | char *colon; | ||
| 330 | struct net_device *dev; | ||
| 331 | char devname[IFNAMSIZ]; | ||
| 332 | |||
| 333 | if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1)) | ||
| 334 | return -EFAULT; | ||
| 335 | |||
| 336 | devname[IFNAMSIZ-1] = 0; | ||
| 337 | colon = strchr(devname, ':'); | ||
| 338 | if (colon) | ||
| 339 | *colon = 0; | ||
| 340 | dev = __dev_get_by_name(devname); | ||
| 341 | if (!dev) | ||
| 342 | return -ENODEV; | ||
| 343 | cfg->fc_oif = dev->ifindex; | ||
| 344 | if (colon) { | ||
| 345 | struct in_ifaddr *ifa; | ||
| 346 | struct in_device *in_dev = __in_dev_get_rtnl(dev); | ||
| 347 | if (!in_dev) | ||
| 348 | return -ENODEV; | ||
| 349 | *colon = ':'; | ||
| 350 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) | ||
| 351 | if (strcmp(ifa->ifa_label, devname) == 0) | ||
| 352 | break; | ||
| 353 | if (ifa == NULL) | ||
| 354 | return -ENODEV; | ||
| 355 | cfg->fc_prefsrc = ifa->ifa_local; | ||
| 356 | } | ||
| 357 | } | ||
| 358 | |||
| 359 | addr = sk_extract_addr(&rt->rt_gateway); | ||
| 360 | if (rt->rt_gateway.sa_family == AF_INET && addr) { | ||
| 361 | cfg->fc_gw = addr; | ||
| 362 | if (rt->rt_flags & RTF_GATEWAY && | ||
| 363 | inet_addr_type(addr) == RTN_UNICAST) | ||
| 364 | cfg->fc_scope = RT_SCOPE_UNIVERSE; | ||
| 365 | } | ||
| 366 | |||
| 367 | if (cmd == SIOCDELRT) | ||
| 368 | return 0; | ||
| 369 | |||
| 370 | if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw) | ||
| 371 | return -EINVAL; | ||
| 372 | |||
| 373 | if (cfg->fc_scope == RT_SCOPE_NOWHERE) | ||
| 374 | cfg->fc_scope = RT_SCOPE_LINK; | ||
| 375 | |||
| 376 | if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) { | ||
| 377 | struct nlattr *mx; | ||
| 378 | int len = 0; | ||
| 379 | |||
| 380 | mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL); | ||
| 381 | if (mx == NULL) | ||
| 382 | return -ENOMEM; | ||
| 383 | |||
| 384 | if (rt->rt_flags & RTF_MTU) | ||
| 385 | len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40); | ||
| 386 | |||
| 387 | if (rt->rt_flags & RTF_WINDOW) | ||
| 388 | len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window); | ||
| 389 | |||
| 390 | if (rt->rt_flags & RTF_IRTT) | ||
| 391 | len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3); | ||
| 392 | |||
| 393 | cfg->fc_mx = mx; | ||
| 394 | cfg->fc_mx_len = len; | ||
| 395 | } | ||
| 396 | |||
| 397 | return 0; | ||
| 398 | } | ||
| 399 | |||
| 236 | /* | 400 | /* |
| 237 | * Handle IP routing ioctl calls. These are used to manipulate the routing tables | 401 | * Handle IP routing ioctl calls. These are used to manipulate the routing tables |
| 238 | */ | 402 | */ |
| 239 | 403 | ||
| 240 | int ip_rt_ioctl(unsigned int cmd, void __user *arg) | 404 | int ip_rt_ioctl(unsigned int cmd, void __user *arg) |
| 241 | { | 405 | { |
| 406 | struct fib_config cfg; | ||
| 407 | struct rtentry rt; | ||
| 242 | int err; | 408 | int err; |
| 243 | struct kern_rta rta; | ||
| 244 | struct rtentry r; | ||
| 245 | struct { | ||
| 246 | struct nlmsghdr nlh; | ||
| 247 | struct rtmsg rtm; | ||
| 248 | } req; | ||
| 249 | 409 | ||
| 250 | switch (cmd) { | 410 | switch (cmd) { |
| 251 | case SIOCADDRT: /* Add a route */ | 411 | case SIOCADDRT: /* Add a route */ |
| 252 | case SIOCDELRT: /* Delete a route */ | 412 | case SIOCDELRT: /* Delete a route */ |
| 253 | if (!capable(CAP_NET_ADMIN)) | 413 | if (!capable(CAP_NET_ADMIN)) |
| 254 | return -EPERM; | 414 | return -EPERM; |
| 255 | if (copy_from_user(&r, arg, sizeof(struct rtentry))) | 415 | |
| 416 | if (copy_from_user(&rt, arg, sizeof(rt))) | ||
| 256 | return -EFAULT; | 417 | return -EFAULT; |
| 418 | |||
| 257 | rtnl_lock(); | 419 | rtnl_lock(); |
| 258 | err = fib_convert_rtentry(cmd, &req.nlh, &req.rtm, &rta, &r); | 420 | err = rtentry_to_fib_config(cmd, &rt, &cfg); |
| 259 | if (err == 0) { | 421 | if (err == 0) { |
| 422 | struct fib_table *tb; | ||
| 423 | |||
| 260 | if (cmd == SIOCDELRT) { | 424 | if (cmd == SIOCDELRT) { |
| 261 | struct fib_table *tb = fib_get_table(req.rtm.rtm_table); | 425 | tb = fib_get_table(cfg.fc_table); |
| 262 | err = -ESRCH; | ||
| 263 | if (tb) | 426 | if (tb) |
| 264 | err = tb->tb_delete(tb, &req.rtm, &rta, &req.nlh, NULL); | 427 | err = tb->tb_delete(tb, &cfg); |
| 428 | else | ||
| 429 | err = -ESRCH; | ||
| 265 | } else { | 430 | } else { |
| 266 | struct fib_table *tb = fib_new_table(req.rtm.rtm_table); | 431 | tb = fib_new_table(cfg.fc_table); |
| 267 | err = -ENOBUFS; | ||
| 268 | if (tb) | 432 | if (tb) |
| 269 | err = tb->tb_insert(tb, &req.rtm, &rta, &req.nlh, NULL); | 433 | err = tb->tb_insert(tb, &cfg); |
| 434 | else | ||
| 435 | err = -ENOBUFS; | ||
| 270 | } | 436 | } |
| 271 | kfree(rta.rta_mx); | 437 | |
| 438 | /* allocated by rtentry_to_fib_config() */ | ||
| 439 | kfree(cfg.fc_mx); | ||
| 272 | } | 440 | } |
| 273 | rtnl_unlock(); | 441 | rtnl_unlock(); |
| 274 | return err; | 442 | return err; |
| @@ -285,77 +453,169 @@ int ip_rt_ioctl(unsigned int cmd, void *arg) | |||
| 285 | 453 | ||
| 286 | #endif | 454 | #endif |
| 287 | 455 | ||
| 288 | static int inet_check_attr(struct rtmsg *r, struct rtattr **rta) | 456 | struct nla_policy rtm_ipv4_policy[RTA_MAX+1] __read_mostly = { |
| 457 | [RTA_DST] = { .type = NLA_U32 }, | ||
| 458 | [RTA_SRC] = { .type = NLA_U32 }, | ||
| 459 | [RTA_IIF] = { .type = NLA_U32 }, | ||
| 460 | [RTA_OIF] = { .type = NLA_U32 }, | ||
| 461 | [RTA_GATEWAY] = { .type = NLA_U32 }, | ||
| 462 | [RTA_PRIORITY] = { .type = NLA_U32 }, | ||
| 463 | [RTA_PREFSRC] = { .type = NLA_U32 }, | ||
| 464 | [RTA_METRICS] = { .type = NLA_NESTED }, | ||
| 465 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, | ||
| 466 | [RTA_PROTOINFO] = { .type = NLA_U32 }, | ||
| 467 | [RTA_FLOW] = { .type = NLA_U32 }, | ||
| 468 | [RTA_MP_ALGO] = { .type = NLA_U32 }, | ||
| 469 | }; | ||
| 470 | |||
| 471 | static int rtm_to_fib_config(struct sk_buff *skb, struct nlmsghdr *nlh, | ||
| 472 | struct fib_config *cfg) | ||
| 289 | { | 473 | { |
| 290 | int i; | 474 | struct nlattr *attr; |
| 291 | 475 | int err, remaining; | |
| 292 | for (i=1; i<=RTA_MAX; i++, rta++) { | 476 | struct rtmsg *rtm; |
| 293 | struct rtattr *attr = *rta; | 477 | |
| 294 | if (attr) { | 478 | err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy); |
| 295 | if (RTA_PAYLOAD(attr) < 4) | 479 | if (err < 0) |
| 296 | return -EINVAL; | 480 | goto errout; |
| 297 | if (i != RTA_MULTIPATH && i != RTA_METRICS) | 481 | |
| 298 | *rta = (struct rtattr*)RTA_DATA(attr); | 482 | memset(cfg, 0, sizeof(*cfg)); |
| 483 | |||
| 484 | rtm = nlmsg_data(nlh); | ||
| 485 | cfg->fc_family = rtm->rtm_family; | ||
| 486 | cfg->fc_dst_len = rtm->rtm_dst_len; | ||
| 487 | cfg->fc_src_len = rtm->rtm_src_len; | ||
| 488 | cfg->fc_tos = rtm->rtm_tos; | ||
| 489 | cfg->fc_table = rtm->rtm_table; | ||
| 490 | cfg->fc_protocol = rtm->rtm_protocol; | ||
| 491 | cfg->fc_scope = rtm->rtm_scope; | ||
| 492 | cfg->fc_type = rtm->rtm_type; | ||
| 493 | cfg->fc_flags = rtm->rtm_flags; | ||
| 494 | cfg->fc_nlflags = nlh->nlmsg_flags; | ||
| 495 | |||
| 496 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; | ||
| 497 | cfg->fc_nlinfo.nlh = nlh; | ||
| 498 | |||
| 499 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { | ||
| 500 | switch (attr->nla_type) { | ||
| 501 | case RTA_DST: | ||
| 502 | cfg->fc_dst = nla_get_be32(attr); | ||
| 503 | break; | ||
| 504 | case RTA_SRC: | ||
| 505 | cfg->fc_src = nla_get_be32(attr); | ||
| 506 | break; | ||
| 507 | case RTA_OIF: | ||
| 508 | cfg->fc_oif = nla_get_u32(attr); | ||
| 509 | break; | ||
| 510 | case RTA_GATEWAY: | ||
| 511 | cfg->fc_gw = nla_get_be32(attr); | ||
| 512 | break; | ||
| 513 | case RTA_PRIORITY: | ||
| 514 | cfg->fc_priority = nla_get_u32(attr); | ||
| 515 | break; | ||
| 516 | case RTA_PREFSRC: | ||
| 517 | cfg->fc_prefsrc = nla_get_be32(attr); | ||
| 518 | break; | ||
| 519 | case RTA_METRICS: | ||
| 520 | cfg->fc_mx = nla_data(attr); | ||
| 521 | cfg->fc_mx_len = nla_len(attr); | ||
| 522 | break; | ||
| 523 | case RTA_MULTIPATH: | ||
| 524 | cfg->fc_mp = nla_data(attr); | ||
| 525 | cfg->fc_mp_len = nla_len(attr); | ||
| 526 | break; | ||
| 527 | case RTA_FLOW: | ||
| 528 | cfg->fc_flow = nla_get_u32(attr); | ||
| 529 | break; | ||
| 530 | case RTA_MP_ALGO: | ||
| 531 | cfg->fc_mp_alg = nla_get_u32(attr); | ||
| 532 | break; | ||
| 533 | case RTA_TABLE: | ||
| 534 | cfg->fc_table = nla_get_u32(attr); | ||
| 535 | break; | ||
| 299 | } | 536 | } |
| 300 | } | 537 | } |
| 538 | |||
| 301 | return 0; | 539 | return 0; |
| 540 | errout: | ||
| 541 | return err; | ||
| 302 | } | 542 | } |
| 303 | 543 | ||
| 304 | int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) | 544 | int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
| 305 | { | 545 | { |
| 306 | struct fib_table * tb; | 546 | struct fib_config cfg; |
| 307 | struct rtattr **rta = arg; | 547 | struct fib_table *tb; |
| 308 | struct rtmsg *r = NLMSG_DATA(nlh); | 548 | int err; |
| 309 | 549 | ||
| 310 | if (inet_check_attr(r, rta)) | 550 | err = rtm_to_fib_config(skb, nlh, &cfg); |
| 311 | return -EINVAL; | 551 | if (err < 0) |
| 552 | goto errout; | ||
| 312 | 553 | ||
| 313 | tb = fib_get_table(r->rtm_table); | 554 | tb = fib_get_table(cfg.fc_table); |
| 314 | if (tb) | 555 | if (tb == NULL) { |
| 315 | return tb->tb_delete(tb, r, (struct kern_rta*)rta, nlh, &NETLINK_CB(skb)); | 556 | err = -ESRCH; |
| 316 | return -ESRCH; | 557 | goto errout; |
| 558 | } | ||
| 559 | |||
| 560 | err = tb->tb_delete(tb, &cfg); | ||
| 561 | errout: | ||
| 562 | return err; | ||
| 317 | } | 563 | } |
| 318 | 564 | ||
| 319 | int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) | 565 | int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
| 320 | { | 566 | { |
| 321 | struct fib_table * tb; | 567 | struct fib_config cfg; |
| 322 | struct rtattr **rta = arg; | 568 | struct fib_table *tb; |
| 323 | struct rtmsg *r = NLMSG_DATA(nlh); | 569 | int err; |
| 324 | 570 | ||
| 325 | if (inet_check_attr(r, rta)) | 571 | err = rtm_to_fib_config(skb, nlh, &cfg); |
| 326 | return -EINVAL; | 572 | if (err < 0) |
| 573 | goto errout; | ||
| 327 | 574 | ||
| 328 | tb = fib_new_table(r->rtm_table); | 575 | tb = fib_new_table(cfg.fc_table); |
| 329 | if (tb) | 576 | if (tb == NULL) { |
| 330 | return tb->tb_insert(tb, r, (struct kern_rta*)rta, nlh, &NETLINK_CB(skb)); | 577 | err = -ENOBUFS; |
| 331 | return -ENOBUFS; | 578 | goto errout; |
| 579 | } | ||
| 580 | |||
| 581 | err = tb->tb_insert(tb, &cfg); | ||
| 582 | errout: | ||
| 583 | return err; | ||
| 332 | } | 584 | } |
| 333 | 585 | ||
| 334 | int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) | 586 | int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
| 335 | { | 587 | { |
| 336 | int t; | 588 | unsigned int h, s_h; |
| 337 | int s_t; | 589 | unsigned int e = 0, s_e; |
| 338 | struct fib_table *tb; | 590 | struct fib_table *tb; |
| 591 | struct hlist_node *node; | ||
| 592 | int dumped = 0; | ||
| 339 | 593 | ||
| 340 | if (NLMSG_PAYLOAD(cb->nlh, 0) >= sizeof(struct rtmsg) && | 594 | if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) && |
| 341 | ((struct rtmsg*)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED) | 595 | ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED) |
| 342 | return ip_rt_dump(skb, cb); | 596 | return ip_rt_dump(skb, cb); |
| 343 | 597 | ||
| 344 | s_t = cb->args[0]; | 598 | s_h = cb->args[0]; |
| 345 | if (s_t == 0) | 599 | s_e = cb->args[1]; |
| 346 | s_t = cb->args[0] = RT_TABLE_MIN; | 600 | |
| 347 | 601 | for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) { | |
| 348 | for (t=s_t; t<=RT_TABLE_MAX; t++) { | 602 | e = 0; |
| 349 | if (t < s_t) continue; | 603 | hlist_for_each_entry(tb, node, &fib_table_hash[h], tb_hlist) { |
| 350 | if (t > s_t) | 604 | if (e < s_e) |
| 351 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); | 605 | goto next; |
| 352 | if ((tb = fib_get_table(t))==NULL) | 606 | if (dumped) |
| 353 | continue; | 607 | memset(&cb->args[2], 0, sizeof(cb->args) - |
| 354 | if (tb->tb_dump(tb, skb, cb) < 0) | 608 | 2 * sizeof(cb->args[0])); |
| 355 | break; | 609 | if (tb->tb_dump(tb, skb, cb) < 0) |
| 610 | goto out; | ||
| 611 | dumped = 1; | ||
| 612 | next: | ||
| 613 | e++; | ||
| 614 | } | ||
| 356 | } | 615 | } |
| 357 | 616 | out: | |
| 358 | cb->args[0] = t; | 617 | cb->args[1] = e; |
| 618 | cb->args[0] = h; | ||
| 359 | 619 | ||
| 360 | return skb->len; | 620 | return skb->len; |
| 361 | } | 621 | } |
| @@ -367,17 +627,18 @@ int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) | |||
| 367 | only when netlink is already locked. | 627 | only when netlink is already locked. |
| 368 | */ | 628 | */ |
| 369 | 629 | ||
| 370 | static void fib_magic(int cmd, int type, u32 dst, int dst_len, struct in_ifaddr *ifa) | 630 | static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa) |
| 371 | { | 631 | { |
| 372 | struct fib_table * tb; | 632 | struct fib_table *tb; |
| 373 | struct { | 633 | struct fib_config cfg = { |
| 374 | struct nlmsghdr nlh; | 634 | .fc_protocol = RTPROT_KERNEL, |
| 375 | struct rtmsg rtm; | 635 | .fc_type = type, |
| 376 | } req; | 636 | .fc_dst = dst, |
| 377 | struct kern_rta rta; | 637 | .fc_dst_len = dst_len, |
| 378 | 638 | .fc_prefsrc = ifa->ifa_local, | |
| 379 | memset(&req.rtm, 0, sizeof(req.rtm)); | 639 | .fc_oif = ifa->ifa_dev->dev->ifindex, |
| 380 | memset(&rta, 0, sizeof(rta)); | 640 | .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND, |
| 641 | }; | ||
| 381 | 642 | ||
| 382 | if (type == RTN_UNICAST) | 643 | if (type == RTN_UNICAST) |
| 383 | tb = fib_new_table(RT_TABLE_MAIN); | 644 | tb = fib_new_table(RT_TABLE_MAIN); |
| @@ -387,26 +648,17 @@ static void fib_magic(int cmd, int type, u32 dst, int dst_len, struct in_ifaddr | |||
| 387 | if (tb == NULL) | 648 | if (tb == NULL) |
| 388 | return; | 649 | return; |
| 389 | 650 | ||
| 390 | req.nlh.nlmsg_len = sizeof(req); | 651 | cfg.fc_table = tb->tb_id; |
| 391 | req.nlh.nlmsg_type = cmd; | ||
| 392 | req.nlh.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_APPEND; | ||
| 393 | req.nlh.nlmsg_pid = 0; | ||
| 394 | req.nlh.nlmsg_seq = 0; | ||
| 395 | 652 | ||
| 396 | req.rtm.rtm_dst_len = dst_len; | 653 | if (type != RTN_LOCAL) |
| 397 | req.rtm.rtm_table = tb->tb_id; | 654 | cfg.fc_scope = RT_SCOPE_LINK; |
| 398 | req.rtm.rtm_protocol = RTPROT_KERNEL; | 655 | else |
| 399 | req.rtm.rtm_scope = (type != RTN_LOCAL ? RT_SCOPE_LINK : RT_SCOPE_HOST); | 656 | cfg.fc_scope = RT_SCOPE_HOST; |
| 400 | req.rtm.rtm_type = type; | ||
| 401 | |||
| 402 | rta.rta_dst = &dst; | ||
| 403 | rta.rta_prefsrc = &ifa->ifa_local; | ||
| 404 | rta.rta_oif = &ifa->ifa_dev->dev->ifindex; | ||
| 405 | 657 | ||
| 406 | if (cmd == RTM_NEWROUTE) | 658 | if (cmd == RTM_NEWROUTE) |
| 407 | tb->tb_insert(tb, &req.rtm, &rta, &req.nlh, NULL); | 659 | tb->tb_insert(tb, &cfg); |
| 408 | else | 660 | else |
| 409 | tb->tb_delete(tb, &req.rtm, &rta, &req.nlh, NULL); | 661 | tb->tb_delete(tb, &cfg); |
| 410 | } | 662 | } |
| 411 | 663 | ||
| 412 | void fib_add_ifaddr(struct in_ifaddr *ifa) | 664 | void fib_add_ifaddr(struct in_ifaddr *ifa) |
| @@ -414,9 +666,9 @@ void fib_add_ifaddr(struct in_ifaddr *ifa) | |||
| 414 | struct in_device *in_dev = ifa->ifa_dev; | 666 | struct in_device *in_dev = ifa->ifa_dev; |
| 415 | struct net_device *dev = in_dev->dev; | 667 | struct net_device *dev = in_dev->dev; |
| 416 | struct in_ifaddr *prim = ifa; | 668 | struct in_ifaddr *prim = ifa; |
| 417 | u32 mask = ifa->ifa_mask; | 669 | __be32 mask = ifa->ifa_mask; |
| 418 | u32 addr = ifa->ifa_local; | 670 | __be32 addr = ifa->ifa_local; |
| 419 | u32 prefix = ifa->ifa_address&mask; | 671 | __be32 prefix = ifa->ifa_address&mask; |
| 420 | 672 | ||
| 421 | if (ifa->ifa_flags&IFA_F_SECONDARY) { | 673 | if (ifa->ifa_flags&IFA_F_SECONDARY) { |
| 422 | prim = inet_ifa_byprefix(in_dev, prefix, mask); | 674 | prim = inet_ifa_byprefix(in_dev, prefix, mask); |
| @@ -432,7 +684,7 @@ void fib_add_ifaddr(struct in_ifaddr *ifa) | |||
| 432 | return; | 684 | return; |
| 433 | 685 | ||
| 434 | /* Add broadcast address, if it is explicitly assigned. */ | 686 | /* Add broadcast address, if it is explicitly assigned. */ |
| 435 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != 0xFFFFFFFF) | 687 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) |
| 436 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); | 688 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
| 437 | 689 | ||
| 438 | if (!ZERONET(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) && | 690 | if (!ZERONET(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) && |
| @@ -454,8 +706,8 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa) | |||
| 454 | struct net_device *dev = in_dev->dev; | 706 | struct net_device *dev = in_dev->dev; |
| 455 | struct in_ifaddr *ifa1; | 707 | struct in_ifaddr *ifa1; |
| 456 | struct in_ifaddr *prim = ifa; | 708 | struct in_ifaddr *prim = ifa; |
| 457 | u32 brd = ifa->ifa_address|~ifa->ifa_mask; | 709 | __be32 brd = ifa->ifa_address|~ifa->ifa_mask; |
| 458 | u32 any = ifa->ifa_address&ifa->ifa_mask; | 710 | __be32 any = ifa->ifa_address&ifa->ifa_mask; |
| 459 | #define LOCAL_OK 1 | 711 | #define LOCAL_OK 1 |
| 460 | #define BRD_OK 2 | 712 | #define BRD_OK 2 |
| 461 | #define BRD0_OK 4 | 713 | #define BRD0_OK 4 |
| @@ -653,11 +905,17 @@ static struct notifier_block fib_netdev_notifier = { | |||
| 653 | 905 | ||
| 654 | void __init ip_fib_init(void) | 906 | void __init ip_fib_init(void) |
| 655 | { | 907 | { |
| 908 | unsigned int i; | ||
| 909 | |||
| 910 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) | ||
| 911 | INIT_HLIST_HEAD(&fib_table_hash[i]); | ||
| 656 | #ifndef CONFIG_IP_MULTIPLE_TABLES | 912 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
| 657 | ip_fib_local_table = fib_hash_init(RT_TABLE_LOCAL); | 913 | ip_fib_local_table = fib_hash_init(RT_TABLE_LOCAL); |
| 914 | hlist_add_head_rcu(&ip_fib_local_table->tb_hlist, &fib_table_hash[0]); | ||
| 658 | ip_fib_main_table = fib_hash_init(RT_TABLE_MAIN); | 915 | ip_fib_main_table = fib_hash_init(RT_TABLE_MAIN); |
| 916 | hlist_add_head_rcu(&ip_fib_main_table->tb_hlist, &fib_table_hash[0]); | ||
| 659 | #else | 917 | #else |
| 660 | fib_rules_init(); | 918 | fib4_rules_init(); |
| 661 | #endif | 919 | #endif |
| 662 | 920 | ||
| 663 | register_netdevice_notifier(&fib_netdev_notifier); | 921 | register_netdevice_notifier(&fib_netdev_notifier); |
