Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * DECnet An implementation of the DECnet protocol suite for the LINUX |
| 4 | * operating system. DECnet is implemented using the BSD Socket |
| 5 | * interface as the means of communication with the user level. |
| 6 | * |
| 7 | * DECnet Routing Forwarding Information Base (Rules) |
| 8 | * |
| 9 | * Author: Steve Whitehouse <SteveW@ACM.org> |
| 10 | * Mostly copied from Alexey Kuznetsov's ipv4/fib_rules.c |
| 11 | * |
| 12 | * |
| 13 | * Changes: |
| 14 | * |
| 15 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/string.h> |
| 17 | #include <linux/net.h> |
| 18 | #include <linux/socket.h> |
| 19 | #include <linux/sockios.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/skbuff.h> |
| 22 | #include <linux/netlink.h> |
| 23 | #include <linux/rtnetlink.h> |
| 24 | #include <linux/proc_fs.h> |
| 25 | #include <linux/netdevice.h> |
| 26 | #include <linux/timer.h> |
| 27 | #include <linux/spinlock.h> |
| 28 | #include <linux/in_route.h> |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 29 | #include <linux/list.h> |
| 30 | #include <linux/rcupdate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/atomic.h> |
| 32 | #include <asm/uaccess.h> |
| 33 | #include <net/neighbour.h> |
| 34 | #include <net/dst.h> |
| 35 | #include <net/flow.h> |
| 36 | #include <net/dn.h> |
| 37 | #include <net/dn_fib.h> |
| 38 | #include <net/dn_neigh.h> |
| 39 | #include <net/dn_dev.h> |
| 40 | |
| 41 | struct dn_fib_rule |
| 42 | { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 43 | struct hlist_node r_hlist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | atomic_t r_clntref; |
| 45 | u32 r_preference; |
| 46 | unsigned char r_table; |
| 47 | unsigned char r_action; |
| 48 | unsigned char r_dst_len; |
| 49 | unsigned char r_src_len; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 50 | __le16 r_src; |
| 51 | __le16 r_srcmask; |
| 52 | __le16 r_dst; |
| 53 | __le16 r_dstmask; |
| 54 | __le16 r_srcmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | u8 r_flags; |
| 56 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
| 57 | u32 r_fwmark; |
| 58 | #endif |
| 59 | int r_ifindex; |
| 60 | char r_ifname[IFNAMSIZ]; |
| 61 | int r_dead; |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 62 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | static struct dn_fib_rule default_rule = { |
| 66 | .r_clntref = ATOMIC_INIT(2), |
| 67 | .r_preference = 0x7fff, |
| 68 | .r_table = RT_TABLE_MAIN, |
| 69 | .r_action = RTN_UNICAST |
| 70 | }; |
| 71 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 72 | static struct hlist_head dn_fib_rules; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | int dn_fib_rtm_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 75 | { |
| 76 | struct rtattr **rta = arg; |
| 77 | struct rtmsg *rtm = NLMSG_DATA(nlh); |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 78 | struct dn_fib_rule *r; |
| 79 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | int err = -ESRCH; |
| 81 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 82 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | if ((!rta[RTA_SRC-1] || memcmp(RTA_DATA(rta[RTA_SRC-1]), &r->r_src, 2) == 0) && |
| 84 | rtm->rtm_src_len == r->r_src_len && |
| 85 | rtm->rtm_dst_len == r->r_dst_len && |
| 86 | (!rta[RTA_DST-1] || memcmp(RTA_DATA(rta[RTA_DST-1]), &r->r_dst, 2) == 0) && |
| 87 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
| 88 | (!rta[RTA_PROTOINFO-1] || memcmp(RTA_DATA(rta[RTA_PROTOINFO-1]), &r->r_fwmark, 4) == 0) && |
| 89 | #endif |
| 90 | (!rtm->rtm_type || rtm->rtm_type == r->r_action) && |
| 91 | (!rta[RTA_PRIORITY-1] || memcmp(RTA_DATA(rta[RTA_PRIORITY-1]), &r->r_preference, 4) == 0) && |
| 92 | (!rta[RTA_IIF-1] || rtattr_strcmp(rta[RTA_IIF-1], r->r_ifname) == 0) && |
| 93 | (!rtm->rtm_table || (r && rtm->rtm_table == r->r_table))) { |
| 94 | |
| 95 | err = -EPERM; |
| 96 | if (r == &default_rule) |
| 97 | break; |
| 98 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 99 | hlist_del_rcu(&r->r_hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | r->r_dead = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | dn_fib_rule_put(r); |
| 102 | err = 0; |
| 103 | break; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | return err; |
| 108 | } |
| 109 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 110 | static inline void dn_fib_rule_put_rcu(struct rcu_head *head) |
| 111 | { |
| 112 | struct dn_fib_rule *r = container_of(head, struct dn_fib_rule, rcu); |
| 113 | kfree(r); |
| 114 | } |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | void dn_fib_rule_put(struct dn_fib_rule *r) |
| 117 | { |
| 118 | if (atomic_dec_and_test(&r->r_clntref)) { |
| 119 | if (r->r_dead) |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 120 | call_rcu(&r->rcu, dn_fib_rule_put_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | else |
| 122 | printk(KERN_DEBUG "Attempt to free alive dn_fib_rule\n"); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | |
| 127 | int dn_fib_rtm_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
| 128 | { |
| 129 | struct rtattr **rta = arg; |
| 130 | struct rtmsg *rtm = NLMSG_DATA(nlh); |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 131 | struct dn_fib_rule *r, *new_r, *last = NULL; |
| 132 | struct hlist_node *node = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | unsigned char table_id; |
| 134 | |
| 135 | if (rtm->rtm_src_len > 16 || rtm->rtm_dst_len > 16) |
| 136 | return -EINVAL; |
| 137 | |
| 138 | if (rta[RTA_IIF-1] && RTA_PAYLOAD(rta[RTA_IIF-1]) > IFNAMSIZ) |
| 139 | return -EINVAL; |
| 140 | |
| 141 | if (rtm->rtm_type == RTN_NAT) |
| 142 | return -EINVAL; |
| 143 | |
| 144 | table_id = rtm->rtm_table; |
| 145 | if (table_id == RT_TABLE_UNSPEC) { |
| 146 | struct dn_fib_table *tb; |
| 147 | if (rtm->rtm_type == RTN_UNICAST) { |
| 148 | if ((tb = dn_fib_empty_table()) == NULL) |
| 149 | return -ENOBUFS; |
| 150 | table_id = tb->n; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | new_r = kmalloc(sizeof(*new_r), GFP_KERNEL); |
| 155 | if (!new_r) |
| 156 | return -ENOMEM; |
| 157 | memset(new_r, 0, sizeof(*new_r)); |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | if (rta[RTA_SRC-1]) |
| 160 | memcpy(&new_r->r_src, RTA_DATA(rta[RTA_SRC-1]), 2); |
| 161 | if (rta[RTA_DST-1]) |
| 162 | memcpy(&new_r->r_dst, RTA_DATA(rta[RTA_DST-1]), 2); |
| 163 | if (rta[RTA_GATEWAY-1]) |
| 164 | memcpy(&new_r->r_srcmap, RTA_DATA(rta[RTA_GATEWAY-1]), 2); |
| 165 | new_r->r_src_len = rtm->rtm_src_len; |
| 166 | new_r->r_dst_len = rtm->rtm_dst_len; |
| 167 | new_r->r_srcmask = dnet_make_mask(rtm->rtm_src_len); |
| 168 | new_r->r_dstmask = dnet_make_mask(rtm->rtm_dst_len); |
| 169 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
| 170 | if (rta[RTA_PROTOINFO-1]) |
| 171 | memcpy(&new_r->r_fwmark, RTA_DATA(rta[RTA_PROTOINFO-1]), 4); |
| 172 | #endif |
| 173 | new_r->r_action = rtm->rtm_type; |
| 174 | new_r->r_flags = rtm->rtm_flags; |
| 175 | if (rta[RTA_PRIORITY-1]) |
| 176 | memcpy(&new_r->r_preference, RTA_DATA(rta[RTA_PRIORITY-1]), 4); |
| 177 | new_r->r_table = table_id; |
| 178 | if (rta[RTA_IIF-1]) { |
| 179 | struct net_device *dev; |
| 180 | rtattr_strlcpy(new_r->r_ifname, rta[RTA_IIF-1], IFNAMSIZ); |
| 181 | new_r->r_ifindex = -1; |
| 182 | dev = dev_get_by_name(new_r->r_ifname); |
| 183 | if (dev) { |
| 184 | new_r->r_ifindex = dev->ifindex; |
| 185 | dev_put(dev); |
| 186 | } |
| 187 | } |
| 188 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 189 | r = container_of(dn_fib_rules.first, struct dn_fib_rule, r_hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (!new_r->r_preference) { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 191 | if (r && r->r_hlist.next != NULL) { |
| 192 | r = container_of(r->r_hlist.next, struct dn_fib_rule, r_hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | if (r->r_preference) |
| 194 | new_r->r_preference = r->r_preference - 1; |
| 195 | } |
| 196 | } |
| 197 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 198 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | if (r->r_preference > new_r->r_preference) |
| 200 | break; |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 201 | last = r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | atomic_inc(&new_r->r_clntref); |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 204 | |
| 205 | if (last) |
| 206 | hlist_add_after_rcu(&last->r_hlist, &new_r->r_hlist); |
| 207 | else |
| 208 | hlist_add_before_rcu(&new_r->r_hlist, &r->r_hlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | int dn_fib_lookup(const struct flowi *flp, struct dn_fib_res *res) |
| 214 | { |
| 215 | struct dn_fib_rule *r, *policy; |
| 216 | struct dn_fib_table *tb; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 217 | __le16 saddr = flp->fld_src; |
| 218 | __le16 daddr = flp->fld_dst; |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 219 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | int err; |
| 221 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 222 | rcu_read_lock(); |
| 223 | |
| 224 | hlist_for_each_entry_rcu(r, node, &dn_fib_rules, r_hlist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | if (((saddr^r->r_src) & r->r_srcmask) || |
| 226 | ((daddr^r->r_dst) & r->r_dstmask) || |
| 227 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
| 228 | (r->r_fwmark && r->r_fwmark != flp->fld_fwmark) || |
| 229 | #endif |
| 230 | (r->r_ifindex && r->r_ifindex != flp->iif)) |
| 231 | continue; |
| 232 | |
| 233 | switch(r->r_action) { |
| 234 | case RTN_UNICAST: |
| 235 | case RTN_NAT: |
| 236 | policy = r; |
| 237 | break; |
| 238 | case RTN_UNREACHABLE: |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 239 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | return -ENETUNREACH; |
| 241 | default: |
| 242 | case RTN_BLACKHOLE: |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 243 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | return -EINVAL; |
| 245 | case RTN_PROHIBIT: |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 246 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | return -EACCES; |
| 248 | } |
| 249 | |
| 250 | if ((tb = dn_fib_get_table(r->r_table, 0)) == NULL) |
| 251 | continue; |
| 252 | err = tb->lookup(tb, flp, res); |
| 253 | if (err == 0) { |
| 254 | res->r = policy; |
| 255 | if (policy) |
| 256 | atomic_inc(&policy->r_clntref); |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 257 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | return 0; |
| 259 | } |
| 260 | if (err < 0 && err != -EAGAIN) { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 261 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | return err; |
| 263 | } |
| 264 | } |
| 265 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 266 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | return -ESRCH; |
| 268 | } |
| 269 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 270 | unsigned dnet_addr_type(__le16 addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | { |
| 272 | struct flowi fl = { .nl_u = { .dn_u = { .daddr = addr } } }; |
| 273 | struct dn_fib_res res; |
| 274 | unsigned ret = RTN_UNICAST; |
| 275 | struct dn_fib_table *tb = dn_fib_tables[RT_TABLE_LOCAL]; |
| 276 | |
| 277 | res.r = NULL; |
| 278 | |
| 279 | if (tb) { |
| 280 | if (!tb->lookup(tb, &fl, &res)) { |
| 281 | ret = res.type; |
| 282 | dn_fib_res_put(&res); |
| 283 | } |
| 284 | } |
| 285 | return ret; |
| 286 | } |
| 287 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 288 | __le16 dn_fib_rules_policy(__le16 saddr, struct dn_fib_res *res, unsigned *flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | { |
| 290 | struct dn_fib_rule *r = res->r; |
| 291 | |
| 292 | if (r->r_action == RTN_NAT) { |
| 293 | int addrtype = dnet_addr_type(r->r_srcmap); |
| 294 | |
| 295 | if (addrtype == RTN_NAT) { |
| 296 | saddr = (saddr&~r->r_srcmask)|r->r_srcmap; |
| 297 | *flags |= RTCF_SNAT; |
| 298 | } else if (addrtype == RTN_LOCAL || r->r_srcmap == 0) { |
| 299 | saddr = r->r_srcmap; |
| 300 | *flags |= RTCF_MASQ; |
| 301 | } |
| 302 | } |
| 303 | return saddr; |
| 304 | } |
| 305 | |
| 306 | static void dn_fib_rules_detach(struct net_device *dev) |
| 307 | { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 308 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | struct dn_fib_rule *r; |
| 310 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 311 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { |
| 312 | if (r->r_ifindex == dev->ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | r->r_ifindex = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | } |
| 315 | } |
| 316 | |
| 317 | static void dn_fib_rules_attach(struct net_device *dev) |
| 318 | { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 319 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | struct dn_fib_rule *r; |
| 321 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 322 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { |
| 323 | if (r->r_ifindex == -1 && strcmp(dev->name, r->r_ifname) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | r->r_ifindex = dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | } |
| 327 | |
| 328 | static int dn_fib_rules_event(struct notifier_block *this, unsigned long event, void *ptr) |
| 329 | { |
| 330 | struct net_device *dev = ptr; |
| 331 | |
| 332 | switch(event) { |
| 333 | case NETDEV_UNREGISTER: |
| 334 | dn_fib_rules_detach(dev); |
| 335 | dn_fib_sync_down(0, dev, 1); |
| 336 | case NETDEV_REGISTER: |
| 337 | dn_fib_rules_attach(dev); |
| 338 | dn_fib_sync_up(dev); |
| 339 | } |
| 340 | |
| 341 | return NOTIFY_DONE; |
| 342 | } |
| 343 | |
| 344 | |
| 345 | static struct notifier_block dn_fib_rules_notifier = { |
| 346 | .notifier_call = dn_fib_rules_event, |
| 347 | }; |
| 348 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 349 | static int dn_fib_fill_rule(struct sk_buff *skb, struct dn_fib_rule *r, |
| 350 | struct netlink_callback *cb, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
| 352 | struct rtmsg *rtm; |
| 353 | struct nlmsghdr *nlh; |
| 354 | unsigned char *b = skb->tail; |
| 355 | |
| 356 | |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 357 | nlh = NLMSG_NEW_ANSWER(skb, cb, RTM_NEWRULE, sizeof(*rtm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | rtm = NLMSG_DATA(nlh); |
| 359 | rtm->rtm_family = AF_DECnet; |
| 360 | rtm->rtm_dst_len = r->r_dst_len; |
| 361 | rtm->rtm_src_len = r->r_src_len; |
| 362 | rtm->rtm_tos = 0; |
| 363 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
| 364 | if (r->r_fwmark) |
| 365 | RTA_PUT(skb, RTA_PROTOINFO, 4, &r->r_fwmark); |
| 366 | #endif |
| 367 | rtm->rtm_table = r->r_table; |
| 368 | rtm->rtm_protocol = 0; |
| 369 | rtm->rtm_scope = 0; |
| 370 | rtm->rtm_type = r->r_action; |
| 371 | rtm->rtm_flags = r->r_flags; |
| 372 | |
| 373 | if (r->r_dst_len) |
| 374 | RTA_PUT(skb, RTA_DST, 2, &r->r_dst); |
| 375 | if (r->r_src_len) |
| 376 | RTA_PUT(skb, RTA_SRC, 2, &r->r_src); |
| 377 | if (r->r_ifname[0]) |
| 378 | RTA_PUT(skb, RTA_IIF, IFNAMSIZ, &r->r_ifname); |
| 379 | if (r->r_preference) |
| 380 | RTA_PUT(skb, RTA_PRIORITY, 4, &r->r_preference); |
| 381 | if (r->r_srcmap) |
| 382 | RTA_PUT(skb, RTA_GATEWAY, 2, &r->r_srcmap); |
| 383 | nlh->nlmsg_len = skb->tail - b; |
| 384 | return skb->len; |
| 385 | |
| 386 | nlmsg_failure: |
| 387 | rtattr_failure: |
| 388 | skb_trim(skb, b - skb->data); |
| 389 | return -1; |
| 390 | } |
| 391 | |
| 392 | int dn_fib_dump_rules(struct sk_buff *skb, struct netlink_callback *cb) |
| 393 | { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 394 | int idx = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | int s_idx = cb->args[0]; |
| 396 | struct dn_fib_rule *r; |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 397 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 399 | rcu_read_lock(); |
| 400 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | if (idx < s_idx) |
Patrick McHardy | 26e0fd1ce | 2006-07-08 13:38:55 -0700 | [diff] [blame] | 402 | goto next; |
Jamal Hadi Salim | b6544c0 | 2005-06-18 22:54:12 -0700 | [diff] [blame] | 403 | if (dn_fib_fill_rule(skb, r, cb, NLM_F_MULTI) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | break; |
Patrick McHardy | 26e0fd1ce | 2006-07-08 13:38:55 -0700 | [diff] [blame] | 405 | next: |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 406 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 408 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | cb->args[0] = idx; |
| 410 | |
| 411 | return skb->len; |
| 412 | } |
| 413 | |
| 414 | void __init dn_fib_rules_init(void) |
| 415 | { |
Steven Whitehouse | ecba320 | 2006-03-20 22:43:28 -0800 | [diff] [blame] | 416 | INIT_HLIST_HEAD(&dn_fib_rules); |
| 417 | hlist_add_head(&default_rule.r_hlist, &dn_fib_rules); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | register_netdevice_notifier(&dn_fib_rules_notifier); |
| 419 | } |
| 420 | |
| 421 | void __exit dn_fib_rules_cleanup(void) |
| 422 | { |
| 423 | unregister_netdevice_notifier(&dn_fib_rules_notifier); |
| 424 | } |
| 425 | |
| 426 | |