12a8cc6c8SYOSHIFUJI Hideaki /* 22a8cc6c8SYOSHIFUJI Hideaki * IPv6 Address Label subsystem 32a8cc6c8SYOSHIFUJI Hideaki * for the IPv6 "Default" Source Address Selection 42a8cc6c8SYOSHIFUJI Hideaki * 52a8cc6c8SYOSHIFUJI Hideaki * Copyright (C)2007 USAGI/WIDE Project 62a8cc6c8SYOSHIFUJI Hideaki */ 72a8cc6c8SYOSHIFUJI Hideaki /* 82a8cc6c8SYOSHIFUJI Hideaki * Author: 92a8cc6c8SYOSHIFUJI Hideaki * YOSHIFUJI Hideaki @ USAGI/WIDE Project <yoshfuji@linux-ipv6.org> 102a8cc6c8SYOSHIFUJI Hideaki */ 112a8cc6c8SYOSHIFUJI Hideaki 122a8cc6c8SYOSHIFUJI Hideaki #include <linux/kernel.h> 132a8cc6c8SYOSHIFUJI Hideaki #include <linux/list.h> 142a8cc6c8SYOSHIFUJI Hideaki #include <linux/rcupdate.h> 152a8cc6c8SYOSHIFUJI Hideaki #include <linux/in6.h> 165a0e3ad6STejun Heo #include <linux/slab.h> 172a8cc6c8SYOSHIFUJI Hideaki #include <net/addrconf.h> 182a8cc6c8SYOSHIFUJI Hideaki #include <linux/if_addrlabel.h> 192a8cc6c8SYOSHIFUJI Hideaki #include <linux/netlink.h> 202a8cc6c8SYOSHIFUJI Hideaki #include <linux/rtnetlink.h> 212a8cc6c8SYOSHIFUJI Hideaki 222a8cc6c8SYOSHIFUJI Hideaki #if 0 232a8cc6c8SYOSHIFUJI Hideaki #define ADDRLABEL(x...) printk(x) 242a8cc6c8SYOSHIFUJI Hideaki #else 252a8cc6c8SYOSHIFUJI Hideaki #define ADDRLABEL(x...) do { ; } while(0) 262a8cc6c8SYOSHIFUJI Hideaki #endif 272a8cc6c8SYOSHIFUJI Hideaki 282a8cc6c8SYOSHIFUJI Hideaki /* 292a8cc6c8SYOSHIFUJI Hideaki * Policy Table 302a8cc6c8SYOSHIFUJI Hideaki */ 312a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry 322a8cc6c8SYOSHIFUJI Hideaki { 333de23255SBenjamin Thery #ifdef CONFIG_NET_NS 343de23255SBenjamin Thery struct net *lbl_net; 353de23255SBenjamin Thery #endif 362a8cc6c8SYOSHIFUJI Hideaki struct in6_addr prefix; 372a8cc6c8SYOSHIFUJI Hideaki int prefixlen; 382a8cc6c8SYOSHIFUJI Hideaki int ifindex; 392a8cc6c8SYOSHIFUJI Hideaki int addrtype; 402a8cc6c8SYOSHIFUJI Hideaki u32 label; 412a8cc6c8SYOSHIFUJI Hideaki struct hlist_node list; 422a8cc6c8SYOSHIFUJI Hideaki atomic_t refcnt; 432a8cc6c8SYOSHIFUJI Hideaki struct rcu_head rcu; 442a8cc6c8SYOSHIFUJI Hideaki }; 452a8cc6c8SYOSHIFUJI Hideaki 462a8cc6c8SYOSHIFUJI Hideaki static struct ip6addrlbl_table 472a8cc6c8SYOSHIFUJI Hideaki { 482a8cc6c8SYOSHIFUJI Hideaki struct hlist_head head; 492a8cc6c8SYOSHIFUJI Hideaki spinlock_t lock; 502a8cc6c8SYOSHIFUJI Hideaki u32 seq; 512a8cc6c8SYOSHIFUJI Hideaki } ip6addrlbl_table; 522a8cc6c8SYOSHIFUJI Hideaki 533de23255SBenjamin Thery static inline 543de23255SBenjamin Thery struct net *ip6addrlbl_net(const struct ip6addrlbl_entry *lbl) 553de23255SBenjamin Thery { 56c2d9ba9bSEric Dumazet return read_pnet(&lbl->lbl_net); 573de23255SBenjamin Thery } 583de23255SBenjamin Thery 592a8cc6c8SYOSHIFUJI Hideaki /* 602a8cc6c8SYOSHIFUJI Hideaki * Default policy table (RFC3484 + extensions) 612a8cc6c8SYOSHIFUJI Hideaki * 622a8cc6c8SYOSHIFUJI Hideaki * prefix addr_type label 632a8cc6c8SYOSHIFUJI Hideaki * ------------------------------------------------------------------------- 642a8cc6c8SYOSHIFUJI Hideaki * ::1/128 LOOPBACK 0 652a8cc6c8SYOSHIFUJI Hideaki * ::/0 N/A 1 662a8cc6c8SYOSHIFUJI Hideaki * 2002::/16 N/A 2 672a8cc6c8SYOSHIFUJI Hideaki * ::/96 COMPATv4 3 682a8cc6c8SYOSHIFUJI Hideaki * ::ffff:0:0/96 V4MAPPED 4 692a8cc6c8SYOSHIFUJI Hideaki * fc00::/7 N/A 5 ULA (RFC 4193) 702a8cc6c8SYOSHIFUJI Hideaki * 2001::/32 N/A 6 Teredo (RFC 4380) 715fe47b8aSJuha-Matti Tapio * 2001:10::/28 N/A 7 ORCHID (RFC 4843) 722a8cc6c8SYOSHIFUJI Hideaki * 732a8cc6c8SYOSHIFUJI Hideaki * Note: 0xffffffff is used if we do not have any policies. 742a8cc6c8SYOSHIFUJI Hideaki */ 752a8cc6c8SYOSHIFUJI Hideaki 762a8cc6c8SYOSHIFUJI Hideaki #define IPV6_ADDR_LABEL_DEFAULT 0xffffffffUL 772a8cc6c8SYOSHIFUJI Hideaki 783de23255SBenjamin Thery static const __net_initdata struct ip6addrlbl_init_table 792a8cc6c8SYOSHIFUJI Hideaki { 802a8cc6c8SYOSHIFUJI Hideaki const struct in6_addr *prefix; 812a8cc6c8SYOSHIFUJI Hideaki int prefixlen; 822a8cc6c8SYOSHIFUJI Hideaki u32 label; 832a8cc6c8SYOSHIFUJI Hideaki } ip6addrlbl_init_table[] = { 842a8cc6c8SYOSHIFUJI Hideaki { /* ::/0 */ 852a8cc6c8SYOSHIFUJI Hideaki .prefix = &in6addr_any, 862a8cc6c8SYOSHIFUJI Hideaki .label = 1, 872a8cc6c8SYOSHIFUJI Hideaki },{ /* fc00::/7 */ 882a8cc6c8SYOSHIFUJI Hideaki .prefix = &(struct in6_addr){{{ 0xfc }}}, 892a8cc6c8SYOSHIFUJI Hideaki .prefixlen = 7, 902a8cc6c8SYOSHIFUJI Hideaki .label = 5, 912a8cc6c8SYOSHIFUJI Hideaki },{ /* 2002::/16 */ 922a8cc6c8SYOSHIFUJI Hideaki .prefix = &(struct in6_addr){{{ 0x20, 0x02 }}}, 932a8cc6c8SYOSHIFUJI Hideaki .prefixlen = 16, 942a8cc6c8SYOSHIFUJI Hideaki .label = 2, 952a8cc6c8SYOSHIFUJI Hideaki },{ /* 2001::/32 */ 962a8cc6c8SYOSHIFUJI Hideaki .prefix = &(struct in6_addr){{{ 0x20, 0x01 }}}, 972a8cc6c8SYOSHIFUJI Hideaki .prefixlen = 32, 982a8cc6c8SYOSHIFUJI Hideaki .label = 6, 995fe47b8aSJuha-Matti Tapio },{ /* 2001:10::/28 */ 1005fe47b8aSJuha-Matti Tapio .prefix = &(struct in6_addr){{{ 0x20, 0x01, 0x00, 0x10 }}}, 1015fe47b8aSJuha-Matti Tapio .prefixlen = 28, 1025fe47b8aSJuha-Matti Tapio .label = 7, 1032a8cc6c8SYOSHIFUJI Hideaki },{ /* ::ffff:0:0 */ 1042a8cc6c8SYOSHIFUJI Hideaki .prefix = &(struct in6_addr){{{ [10] = 0xff, [11] = 0xff }}}, 1052a8cc6c8SYOSHIFUJI Hideaki .prefixlen = 96, 1062a8cc6c8SYOSHIFUJI Hideaki .label = 4, 1072a8cc6c8SYOSHIFUJI Hideaki },{ /* ::/96 */ 1082a8cc6c8SYOSHIFUJI Hideaki .prefix = &in6addr_any, 1092a8cc6c8SYOSHIFUJI Hideaki .prefixlen = 96, 1102a8cc6c8SYOSHIFUJI Hideaki .label = 3, 1112a8cc6c8SYOSHIFUJI Hideaki },{ /* ::1/128 */ 1122a8cc6c8SYOSHIFUJI Hideaki .prefix = &in6addr_loopback, 1132a8cc6c8SYOSHIFUJI Hideaki .prefixlen = 128, 1142a8cc6c8SYOSHIFUJI Hideaki .label = 0, 1152a8cc6c8SYOSHIFUJI Hideaki } 1162a8cc6c8SYOSHIFUJI Hideaki }; 1172a8cc6c8SYOSHIFUJI Hideaki 1182a8cc6c8SYOSHIFUJI Hideaki /* Object management */ 1192a8cc6c8SYOSHIFUJI Hideaki static inline void ip6addrlbl_free(struct ip6addrlbl_entry *p) 1202a8cc6c8SYOSHIFUJI Hideaki { 1213de23255SBenjamin Thery #ifdef CONFIG_NET_NS 1223de23255SBenjamin Thery release_net(p->lbl_net); 1233de23255SBenjamin Thery #endif 1242a8cc6c8SYOSHIFUJI Hideaki kfree(p); 1252a8cc6c8SYOSHIFUJI Hideaki } 1262a8cc6c8SYOSHIFUJI Hideaki 12785040bcbSYOSHIFUJI Hideaki static void ip6addrlbl_free_rcu(struct rcu_head *h) 12885040bcbSYOSHIFUJI Hideaki { 12985040bcbSYOSHIFUJI Hideaki ip6addrlbl_free(container_of(h, struct ip6addrlbl_entry, rcu)); 13085040bcbSYOSHIFUJI Hideaki } 13185040bcbSYOSHIFUJI Hideaki 1322a8cc6c8SYOSHIFUJI Hideaki static inline int ip6addrlbl_hold(struct ip6addrlbl_entry *p) 1332a8cc6c8SYOSHIFUJI Hideaki { 1342a8cc6c8SYOSHIFUJI Hideaki return atomic_inc_not_zero(&p->refcnt); 1352a8cc6c8SYOSHIFUJI Hideaki } 1362a8cc6c8SYOSHIFUJI Hideaki 1372a8cc6c8SYOSHIFUJI Hideaki static inline void ip6addrlbl_put(struct ip6addrlbl_entry *p) 1382a8cc6c8SYOSHIFUJI Hideaki { 1392a8cc6c8SYOSHIFUJI Hideaki if (atomic_dec_and_test(&p->refcnt)) 14085040bcbSYOSHIFUJI Hideaki call_rcu(&p->rcu, ip6addrlbl_free_rcu); 1412a8cc6c8SYOSHIFUJI Hideaki } 1422a8cc6c8SYOSHIFUJI Hideaki 1432a8cc6c8SYOSHIFUJI Hideaki /* Find label */ 1443de23255SBenjamin Thery static int __ip6addrlbl_match(struct net *net, 1453de23255SBenjamin Thery struct ip6addrlbl_entry *p, 1462a8cc6c8SYOSHIFUJI Hideaki const struct in6_addr *addr, 1472a8cc6c8SYOSHIFUJI Hideaki int addrtype, int ifindex) 1482a8cc6c8SYOSHIFUJI Hideaki { 1493de23255SBenjamin Thery if (!net_eq(ip6addrlbl_net(p), net)) 1503de23255SBenjamin Thery return 0; 1512a8cc6c8SYOSHIFUJI Hideaki if (p->ifindex && p->ifindex != ifindex) 1522a8cc6c8SYOSHIFUJI Hideaki return 0; 1532a8cc6c8SYOSHIFUJI Hideaki if (p->addrtype && p->addrtype != addrtype) 1542a8cc6c8SYOSHIFUJI Hideaki return 0; 1552a8cc6c8SYOSHIFUJI Hideaki if (!ipv6_prefix_equal(addr, &p->prefix, p->prefixlen)) 1562a8cc6c8SYOSHIFUJI Hideaki return 0; 1572a8cc6c8SYOSHIFUJI Hideaki return 1; 1582a8cc6c8SYOSHIFUJI Hideaki } 1592a8cc6c8SYOSHIFUJI Hideaki 1603de23255SBenjamin Thery static struct ip6addrlbl_entry *__ipv6_addr_label(struct net *net, 1613de23255SBenjamin Thery const struct in6_addr *addr, 1622a8cc6c8SYOSHIFUJI Hideaki int type, int ifindex) 1632a8cc6c8SYOSHIFUJI Hideaki { 1642a8cc6c8SYOSHIFUJI Hideaki struct hlist_node *pos; 1652a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p; 1662a8cc6c8SYOSHIFUJI Hideaki hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) { 1673de23255SBenjamin Thery if (__ip6addrlbl_match(net, p, addr, type, ifindex)) 1682a8cc6c8SYOSHIFUJI Hideaki return p; 1692a8cc6c8SYOSHIFUJI Hideaki } 1702a8cc6c8SYOSHIFUJI Hideaki return NULL; 1712a8cc6c8SYOSHIFUJI Hideaki } 1722a8cc6c8SYOSHIFUJI Hideaki 1733de23255SBenjamin Thery u32 ipv6_addr_label(struct net *net, 1743de23255SBenjamin Thery const struct in6_addr *addr, int type, int ifindex) 1752a8cc6c8SYOSHIFUJI Hideaki { 1762a8cc6c8SYOSHIFUJI Hideaki u32 label; 1772a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p; 1782a8cc6c8SYOSHIFUJI Hideaki 1792a8cc6c8SYOSHIFUJI Hideaki type &= IPV6_ADDR_MAPPED | IPV6_ADDR_COMPATv4 | IPV6_ADDR_LOOPBACK; 1802a8cc6c8SYOSHIFUJI Hideaki 1812a8cc6c8SYOSHIFUJI Hideaki rcu_read_lock(); 1823de23255SBenjamin Thery p = __ipv6_addr_label(net, addr, type, ifindex); 1832a8cc6c8SYOSHIFUJI Hideaki label = p ? p->label : IPV6_ADDR_LABEL_DEFAULT; 1842a8cc6c8SYOSHIFUJI Hideaki rcu_read_unlock(); 1852a8cc6c8SYOSHIFUJI Hideaki 1865b095d98SHarvey Harrison ADDRLABEL(KERN_DEBUG "%s(addr=%pI6, type=%d, ifindex=%d) => %08x\n", 1870c6ce78aSHarvey Harrison __func__, addr, type, ifindex, label); 1882a8cc6c8SYOSHIFUJI Hideaki 1892a8cc6c8SYOSHIFUJI Hideaki return label; 1902a8cc6c8SYOSHIFUJI Hideaki } 1912a8cc6c8SYOSHIFUJI Hideaki 1922a8cc6c8SYOSHIFUJI Hideaki /* allocate one entry */ 1933de23255SBenjamin Thery static struct ip6addrlbl_entry *ip6addrlbl_alloc(struct net *net, 1943de23255SBenjamin Thery const struct in6_addr *prefix, 1952a8cc6c8SYOSHIFUJI Hideaki int prefixlen, int ifindex, 1962a8cc6c8SYOSHIFUJI Hideaki u32 label) 1972a8cc6c8SYOSHIFUJI Hideaki { 1982a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *newp; 1992a8cc6c8SYOSHIFUJI Hideaki int addrtype; 2002a8cc6c8SYOSHIFUJI Hideaki 2015b095d98SHarvey Harrison ADDRLABEL(KERN_DEBUG "%s(prefix=%pI6, prefixlen=%d, ifindex=%d, label=%u)\n", 2020c6ce78aSHarvey Harrison __func__, prefix, prefixlen, ifindex, (unsigned int)label); 2032a8cc6c8SYOSHIFUJI Hideaki 2042a8cc6c8SYOSHIFUJI Hideaki addrtype = ipv6_addr_type(prefix) & (IPV6_ADDR_MAPPED | IPV6_ADDR_COMPATv4 | IPV6_ADDR_LOOPBACK); 2052a8cc6c8SYOSHIFUJI Hideaki 2062a8cc6c8SYOSHIFUJI Hideaki switch (addrtype) { 2072a8cc6c8SYOSHIFUJI Hideaki case IPV6_ADDR_MAPPED: 2082a8cc6c8SYOSHIFUJI Hideaki if (prefixlen > 96) 2092a8cc6c8SYOSHIFUJI Hideaki return ERR_PTR(-EINVAL); 2102a8cc6c8SYOSHIFUJI Hideaki if (prefixlen < 96) 2112a8cc6c8SYOSHIFUJI Hideaki addrtype = 0; 2122a8cc6c8SYOSHIFUJI Hideaki break; 2132a8cc6c8SYOSHIFUJI Hideaki case IPV6_ADDR_COMPATv4: 2142a8cc6c8SYOSHIFUJI Hideaki if (prefixlen != 96) 2152a8cc6c8SYOSHIFUJI Hideaki addrtype = 0; 2162a8cc6c8SYOSHIFUJI Hideaki break; 2172a8cc6c8SYOSHIFUJI Hideaki case IPV6_ADDR_LOOPBACK: 2182a8cc6c8SYOSHIFUJI Hideaki if (prefixlen != 128) 2192a8cc6c8SYOSHIFUJI Hideaki addrtype = 0; 2202a8cc6c8SYOSHIFUJI Hideaki break; 2212a8cc6c8SYOSHIFUJI Hideaki } 2222a8cc6c8SYOSHIFUJI Hideaki 2232a8cc6c8SYOSHIFUJI Hideaki newp = kmalloc(sizeof(*newp), GFP_KERNEL); 2242a8cc6c8SYOSHIFUJI Hideaki if (!newp) 2252a8cc6c8SYOSHIFUJI Hideaki return ERR_PTR(-ENOMEM); 2262a8cc6c8SYOSHIFUJI Hideaki 2272a8cc6c8SYOSHIFUJI Hideaki ipv6_addr_prefix(&newp->prefix, prefix, prefixlen); 2282a8cc6c8SYOSHIFUJI Hideaki newp->prefixlen = prefixlen; 2292a8cc6c8SYOSHIFUJI Hideaki newp->ifindex = ifindex; 2302a8cc6c8SYOSHIFUJI Hideaki newp->addrtype = addrtype; 2312a8cc6c8SYOSHIFUJI Hideaki newp->label = label; 2322a8cc6c8SYOSHIFUJI Hideaki INIT_HLIST_NODE(&newp->list); 2333de23255SBenjamin Thery #ifdef CONFIG_NET_NS 2343de23255SBenjamin Thery newp->lbl_net = hold_net(net); 2353de23255SBenjamin Thery #endif 2362a8cc6c8SYOSHIFUJI Hideaki atomic_set(&newp->refcnt, 1); 2372a8cc6c8SYOSHIFUJI Hideaki return newp; 2382a8cc6c8SYOSHIFUJI Hideaki } 2392a8cc6c8SYOSHIFUJI Hideaki 2402a8cc6c8SYOSHIFUJI Hideaki /* add a label */ 24140fee36eSYOSHIFUJI Hideaki static int __ip6addrlbl_add(struct ip6addrlbl_entry *newp, int replace) 2422a8cc6c8SYOSHIFUJI Hideaki { 2432a8cc6c8SYOSHIFUJI Hideaki int ret = 0; 2442a8cc6c8SYOSHIFUJI Hideaki 2452a8cc6c8SYOSHIFUJI Hideaki ADDRLABEL(KERN_DEBUG "%s(newp=%p, replace=%d)\n", 2460dc47877SHarvey Harrison __func__, 2472a8cc6c8SYOSHIFUJI Hideaki newp, replace); 2482a8cc6c8SYOSHIFUJI Hideaki 2492a8cc6c8SYOSHIFUJI Hideaki if (hlist_empty(&ip6addrlbl_table.head)) { 2502a8cc6c8SYOSHIFUJI Hideaki hlist_add_head_rcu(&newp->list, &ip6addrlbl_table.head); 2512a8cc6c8SYOSHIFUJI Hideaki } else { 2522a8cc6c8SYOSHIFUJI Hideaki struct hlist_node *pos, *n; 2532a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p = NULL; 2542a8cc6c8SYOSHIFUJI Hideaki hlist_for_each_entry_safe(p, pos, n, 2552a8cc6c8SYOSHIFUJI Hideaki &ip6addrlbl_table.head, list) { 2562a8cc6c8SYOSHIFUJI Hideaki if (p->prefixlen == newp->prefixlen && 2573de23255SBenjamin Thery net_eq(ip6addrlbl_net(p), ip6addrlbl_net(newp)) && 2582a8cc6c8SYOSHIFUJI Hideaki p->ifindex == newp->ifindex && 2592a8cc6c8SYOSHIFUJI Hideaki ipv6_addr_equal(&p->prefix, &newp->prefix)) { 2602a8cc6c8SYOSHIFUJI Hideaki if (!replace) { 2612a8cc6c8SYOSHIFUJI Hideaki ret = -EEXIST; 2622a8cc6c8SYOSHIFUJI Hideaki goto out; 2632a8cc6c8SYOSHIFUJI Hideaki } 2642a8cc6c8SYOSHIFUJI Hideaki hlist_replace_rcu(&p->list, &newp->list); 2652a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_put(p); 2662a8cc6c8SYOSHIFUJI Hideaki goto out; 2672a8cc6c8SYOSHIFUJI Hideaki } else if ((p->prefixlen == newp->prefixlen && !p->ifindex) || 2682a8cc6c8SYOSHIFUJI Hideaki (p->prefixlen < newp->prefixlen)) { 2692a8cc6c8SYOSHIFUJI Hideaki hlist_add_before_rcu(&newp->list, &p->list); 2702a8cc6c8SYOSHIFUJI Hideaki goto out; 2712a8cc6c8SYOSHIFUJI Hideaki } 2722a8cc6c8SYOSHIFUJI Hideaki } 2732a8cc6c8SYOSHIFUJI Hideaki hlist_add_after_rcu(&p->list, &newp->list); 2742a8cc6c8SYOSHIFUJI Hideaki } 2752a8cc6c8SYOSHIFUJI Hideaki out: 2762a8cc6c8SYOSHIFUJI Hideaki if (!ret) 2772a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_table.seq++; 2782a8cc6c8SYOSHIFUJI Hideaki return ret; 2792a8cc6c8SYOSHIFUJI Hideaki } 2802a8cc6c8SYOSHIFUJI Hideaki 2812a8cc6c8SYOSHIFUJI Hideaki /* add a label */ 2823de23255SBenjamin Thery static int ip6addrlbl_add(struct net *net, 2833de23255SBenjamin Thery const struct in6_addr *prefix, int prefixlen, 2842a8cc6c8SYOSHIFUJI Hideaki int ifindex, u32 label, int replace) 2852a8cc6c8SYOSHIFUJI Hideaki { 2862a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *newp; 2872a8cc6c8SYOSHIFUJI Hideaki int ret = 0; 2882a8cc6c8SYOSHIFUJI Hideaki 2895b095d98SHarvey Harrison ADDRLABEL(KERN_DEBUG "%s(prefix=%pI6, prefixlen=%d, ifindex=%d, label=%u, replace=%d)\n", 2900c6ce78aSHarvey Harrison __func__, prefix, prefixlen, ifindex, (unsigned int)label, 2912a8cc6c8SYOSHIFUJI Hideaki replace); 2922a8cc6c8SYOSHIFUJI Hideaki 2933de23255SBenjamin Thery newp = ip6addrlbl_alloc(net, prefix, prefixlen, ifindex, label); 2942a8cc6c8SYOSHIFUJI Hideaki if (IS_ERR(newp)) 2952a8cc6c8SYOSHIFUJI Hideaki return PTR_ERR(newp); 2962a8cc6c8SYOSHIFUJI Hideaki spin_lock(&ip6addrlbl_table.lock); 2972a8cc6c8SYOSHIFUJI Hideaki ret = __ip6addrlbl_add(newp, replace); 2982a8cc6c8SYOSHIFUJI Hideaki spin_unlock(&ip6addrlbl_table.lock); 2992a8cc6c8SYOSHIFUJI Hideaki if (ret) 3002a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_free(newp); 3012a8cc6c8SYOSHIFUJI Hideaki return ret; 3022a8cc6c8SYOSHIFUJI Hideaki } 3032a8cc6c8SYOSHIFUJI Hideaki 3042a8cc6c8SYOSHIFUJI Hideaki /* remove a label */ 3053de23255SBenjamin Thery static int __ip6addrlbl_del(struct net *net, 3063de23255SBenjamin Thery const struct in6_addr *prefix, int prefixlen, 3072a8cc6c8SYOSHIFUJI Hideaki int ifindex) 3082a8cc6c8SYOSHIFUJI Hideaki { 3092a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p = NULL; 3102a8cc6c8SYOSHIFUJI Hideaki struct hlist_node *pos, *n; 3112a8cc6c8SYOSHIFUJI Hideaki int ret = -ESRCH; 3122a8cc6c8SYOSHIFUJI Hideaki 3135b095d98SHarvey Harrison ADDRLABEL(KERN_DEBUG "%s(prefix=%pI6, prefixlen=%d, ifindex=%d)\n", 3140c6ce78aSHarvey Harrison __func__, prefix, prefixlen, ifindex); 3152a8cc6c8SYOSHIFUJI Hideaki 3162a8cc6c8SYOSHIFUJI Hideaki hlist_for_each_entry_safe(p, pos, n, &ip6addrlbl_table.head, list) { 3172a8cc6c8SYOSHIFUJI Hideaki if (p->prefixlen == prefixlen && 3183de23255SBenjamin Thery net_eq(ip6addrlbl_net(p), net) && 3192a8cc6c8SYOSHIFUJI Hideaki p->ifindex == ifindex && 3202a8cc6c8SYOSHIFUJI Hideaki ipv6_addr_equal(&p->prefix, prefix)) { 3212a8cc6c8SYOSHIFUJI Hideaki hlist_del_rcu(&p->list); 3222a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_put(p); 3232a8cc6c8SYOSHIFUJI Hideaki ret = 0; 3242a8cc6c8SYOSHIFUJI Hideaki break; 3252a8cc6c8SYOSHIFUJI Hideaki } 3262a8cc6c8SYOSHIFUJI Hideaki } 3272a8cc6c8SYOSHIFUJI Hideaki return ret; 3282a8cc6c8SYOSHIFUJI Hideaki } 3292a8cc6c8SYOSHIFUJI Hideaki 3303de23255SBenjamin Thery static int ip6addrlbl_del(struct net *net, 3313de23255SBenjamin Thery const struct in6_addr *prefix, int prefixlen, 3322a8cc6c8SYOSHIFUJI Hideaki int ifindex) 3332a8cc6c8SYOSHIFUJI Hideaki { 3342a8cc6c8SYOSHIFUJI Hideaki struct in6_addr prefix_buf; 3352a8cc6c8SYOSHIFUJI Hideaki int ret; 3362a8cc6c8SYOSHIFUJI Hideaki 3375b095d98SHarvey Harrison ADDRLABEL(KERN_DEBUG "%s(prefix=%pI6, prefixlen=%d, ifindex=%d)\n", 3380c6ce78aSHarvey Harrison __func__, prefix, prefixlen, ifindex); 3392a8cc6c8SYOSHIFUJI Hideaki 3402a8cc6c8SYOSHIFUJI Hideaki ipv6_addr_prefix(&prefix_buf, prefix, prefixlen); 3412a8cc6c8SYOSHIFUJI Hideaki spin_lock(&ip6addrlbl_table.lock); 3423de23255SBenjamin Thery ret = __ip6addrlbl_del(net, &prefix_buf, prefixlen, ifindex); 3432a8cc6c8SYOSHIFUJI Hideaki spin_unlock(&ip6addrlbl_table.lock); 3442a8cc6c8SYOSHIFUJI Hideaki return ret; 3452a8cc6c8SYOSHIFUJI Hideaki } 3462a8cc6c8SYOSHIFUJI Hideaki 3472a8cc6c8SYOSHIFUJI Hideaki /* add default label */ 3483de23255SBenjamin Thery static int __net_init ip6addrlbl_net_init(struct net *net) 3492a8cc6c8SYOSHIFUJI Hideaki { 3502a8cc6c8SYOSHIFUJI Hideaki int err = 0; 3512a8cc6c8SYOSHIFUJI Hideaki int i; 3522a8cc6c8SYOSHIFUJI Hideaki 3530dc47877SHarvey Harrison ADDRLABEL(KERN_DEBUG "%s()\n", __func__); 3542a8cc6c8SYOSHIFUJI Hideaki 3552a8cc6c8SYOSHIFUJI Hideaki for (i = 0; i < ARRAY_SIZE(ip6addrlbl_init_table); i++) { 3563de23255SBenjamin Thery int ret = ip6addrlbl_add(net, 3573de23255SBenjamin Thery ip6addrlbl_init_table[i].prefix, 3582a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_init_table[i].prefixlen, 3592a8cc6c8SYOSHIFUJI Hideaki 0, 3602a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_init_table[i].label, 0); 3612a8cc6c8SYOSHIFUJI Hideaki /* XXX: should we free all rules when we catch an error? */ 3622a8cc6c8SYOSHIFUJI Hideaki if (ret && (!err || err != -ENOMEM)) 3632a8cc6c8SYOSHIFUJI Hideaki err = ret; 3642a8cc6c8SYOSHIFUJI Hideaki } 3652a8cc6c8SYOSHIFUJI Hideaki return err; 3662a8cc6c8SYOSHIFUJI Hideaki } 3672a8cc6c8SYOSHIFUJI Hideaki 3683de23255SBenjamin Thery static void __net_exit ip6addrlbl_net_exit(struct net *net) 3693de23255SBenjamin Thery { 3703de23255SBenjamin Thery struct ip6addrlbl_entry *p = NULL; 3713de23255SBenjamin Thery struct hlist_node *pos, *n; 3723de23255SBenjamin Thery 3733de23255SBenjamin Thery /* Remove all labels belonging to the exiting net */ 3743de23255SBenjamin Thery spin_lock(&ip6addrlbl_table.lock); 3753de23255SBenjamin Thery hlist_for_each_entry_safe(p, pos, n, &ip6addrlbl_table.head, list) { 3763de23255SBenjamin Thery if (net_eq(ip6addrlbl_net(p), net)) { 3773de23255SBenjamin Thery hlist_del_rcu(&p->list); 3783de23255SBenjamin Thery ip6addrlbl_put(p); 3793de23255SBenjamin Thery } 3803de23255SBenjamin Thery } 3813de23255SBenjamin Thery spin_unlock(&ip6addrlbl_table.lock); 3823de23255SBenjamin Thery } 3833de23255SBenjamin Thery 3843de23255SBenjamin Thery static struct pernet_operations ipv6_addr_label_ops = { 3853de23255SBenjamin Thery .init = ip6addrlbl_net_init, 3863de23255SBenjamin Thery .exit = ip6addrlbl_net_exit, 3873de23255SBenjamin Thery }; 3883de23255SBenjamin Thery 3892a8cc6c8SYOSHIFUJI Hideaki int __init ipv6_addr_label_init(void) 3902a8cc6c8SYOSHIFUJI Hideaki { 3912a8cc6c8SYOSHIFUJI Hideaki spin_lock_init(&ip6addrlbl_table.lock); 3922a8cc6c8SYOSHIFUJI Hideaki 3933de23255SBenjamin Thery return register_pernet_subsys(&ipv6_addr_label_ops); 3942a8cc6c8SYOSHIFUJI Hideaki } 3952a8cc6c8SYOSHIFUJI Hideaki 3962a8cc6c8SYOSHIFUJI Hideaki static const struct nla_policy ifal_policy[IFAL_MAX+1] = { 3972a8cc6c8SYOSHIFUJI Hideaki [IFAL_ADDRESS] = { .len = sizeof(struct in6_addr), }, 3982a8cc6c8SYOSHIFUJI Hideaki [IFAL_LABEL] = { .len = sizeof(u32), }, 3992a8cc6c8SYOSHIFUJI Hideaki }; 4002a8cc6c8SYOSHIFUJI Hideaki 4012a8cc6c8SYOSHIFUJI Hideaki static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh, 4022a8cc6c8SYOSHIFUJI Hideaki void *arg) 4032a8cc6c8SYOSHIFUJI Hideaki { 4043b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(skb->sk); 4052a8cc6c8SYOSHIFUJI Hideaki struct ifaddrlblmsg *ifal; 4062a8cc6c8SYOSHIFUJI Hideaki struct nlattr *tb[IFAL_MAX+1]; 4072a8cc6c8SYOSHIFUJI Hideaki struct in6_addr *pfx; 4082a8cc6c8SYOSHIFUJI Hideaki u32 label; 4092a8cc6c8SYOSHIFUJI Hideaki int err = 0; 4102a8cc6c8SYOSHIFUJI Hideaki 4112a8cc6c8SYOSHIFUJI Hideaki err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy); 4122a8cc6c8SYOSHIFUJI Hideaki if (err < 0) 4132a8cc6c8SYOSHIFUJI Hideaki return err; 4142a8cc6c8SYOSHIFUJI Hideaki 4152a8cc6c8SYOSHIFUJI Hideaki ifal = nlmsg_data(nlh); 4162a8cc6c8SYOSHIFUJI Hideaki 4172a8cc6c8SYOSHIFUJI Hideaki if (ifal->ifal_family != AF_INET6 || 4182a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_prefixlen > 128) 4192a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 4202a8cc6c8SYOSHIFUJI Hideaki 4212a8cc6c8SYOSHIFUJI Hideaki if (!tb[IFAL_ADDRESS]) 4222a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 4232a8cc6c8SYOSHIFUJI Hideaki 4242a8cc6c8SYOSHIFUJI Hideaki pfx = nla_data(tb[IFAL_ADDRESS]); 4252a8cc6c8SYOSHIFUJI Hideaki if (!pfx) 4262a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 4272a8cc6c8SYOSHIFUJI Hideaki 4282a8cc6c8SYOSHIFUJI Hideaki if (!tb[IFAL_LABEL]) 4292a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 4302a8cc6c8SYOSHIFUJI Hideaki label = nla_get_u32(tb[IFAL_LABEL]); 4312a8cc6c8SYOSHIFUJI Hideaki if (label == IPV6_ADDR_LABEL_DEFAULT) 4322a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 4332a8cc6c8SYOSHIFUJI Hideaki 4342a8cc6c8SYOSHIFUJI Hideaki switch(nlh->nlmsg_type) { 4352a8cc6c8SYOSHIFUJI Hideaki case RTM_NEWADDRLABEL: 4360771275bSFlorian Westphal if (ifal->ifal_index && 4370771275bSFlorian Westphal !__dev_get_by_index(net, ifal->ifal_index)) 4380771275bSFlorian Westphal return -EINVAL; 4390771275bSFlorian Westphal 4403de23255SBenjamin Thery err = ip6addrlbl_add(net, pfx, ifal->ifal_prefixlen, 4412a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_index, label, 4422a8cc6c8SYOSHIFUJI Hideaki nlh->nlmsg_flags & NLM_F_REPLACE); 4432a8cc6c8SYOSHIFUJI Hideaki break; 4442a8cc6c8SYOSHIFUJI Hideaki case RTM_DELADDRLABEL: 4453de23255SBenjamin Thery err = ip6addrlbl_del(net, pfx, ifal->ifal_prefixlen, 4462a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_index); 4472a8cc6c8SYOSHIFUJI Hideaki break; 4482a8cc6c8SYOSHIFUJI Hideaki default: 4492a8cc6c8SYOSHIFUJI Hideaki err = -EOPNOTSUPP; 4502a8cc6c8SYOSHIFUJI Hideaki } 4512a8cc6c8SYOSHIFUJI Hideaki return err; 4522a8cc6c8SYOSHIFUJI Hideaki } 4532a8cc6c8SYOSHIFUJI Hideaki 4542a8cc6c8SYOSHIFUJI Hideaki static inline void ip6addrlbl_putmsg(struct nlmsghdr *nlh, 4552a8cc6c8SYOSHIFUJI Hideaki int prefixlen, int ifindex, u32 lseq) 4562a8cc6c8SYOSHIFUJI Hideaki { 4572a8cc6c8SYOSHIFUJI Hideaki struct ifaddrlblmsg *ifal = nlmsg_data(nlh); 4582a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_family = AF_INET6; 4592a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_prefixlen = prefixlen; 4602a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_flags = 0; 4612a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_index = ifindex; 4622a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_seq = lseq; 4632a8cc6c8SYOSHIFUJI Hideaki }; 4642a8cc6c8SYOSHIFUJI Hideaki 4652a8cc6c8SYOSHIFUJI Hideaki static int ip6addrlbl_fill(struct sk_buff *skb, 4662a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p, 4672a8cc6c8SYOSHIFUJI Hideaki u32 lseq, 4682a8cc6c8SYOSHIFUJI Hideaki u32 pid, u32 seq, int event, 4692a8cc6c8SYOSHIFUJI Hideaki unsigned int flags) 4702a8cc6c8SYOSHIFUJI Hideaki { 4712a8cc6c8SYOSHIFUJI Hideaki struct nlmsghdr *nlh = nlmsg_put(skb, pid, seq, event, 4722a8cc6c8SYOSHIFUJI Hideaki sizeof(struct ifaddrlblmsg), flags); 4732a8cc6c8SYOSHIFUJI Hideaki if (!nlh) 4742a8cc6c8SYOSHIFUJI Hideaki return -EMSGSIZE; 4752a8cc6c8SYOSHIFUJI Hideaki 4762a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_putmsg(nlh, p->prefixlen, p->ifindex, lseq); 4772a8cc6c8SYOSHIFUJI Hideaki 4782a8cc6c8SYOSHIFUJI Hideaki if (nla_put(skb, IFAL_ADDRESS, 16, &p->prefix) < 0 || 4792a8cc6c8SYOSHIFUJI Hideaki nla_put_u32(skb, IFAL_LABEL, p->label) < 0) { 4802a8cc6c8SYOSHIFUJI Hideaki nlmsg_cancel(skb, nlh); 4812a8cc6c8SYOSHIFUJI Hideaki return -EMSGSIZE; 4822a8cc6c8SYOSHIFUJI Hideaki } 4832a8cc6c8SYOSHIFUJI Hideaki 4842a8cc6c8SYOSHIFUJI Hideaki return nlmsg_end(skb, nlh); 4852a8cc6c8SYOSHIFUJI Hideaki } 4862a8cc6c8SYOSHIFUJI Hideaki 4872a8cc6c8SYOSHIFUJI Hideaki static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb) 4882a8cc6c8SYOSHIFUJI Hideaki { 4893b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(skb->sk); 4902a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p; 4912a8cc6c8SYOSHIFUJI Hideaki struct hlist_node *pos; 4922a8cc6c8SYOSHIFUJI Hideaki int idx = 0, s_idx = cb->args[0]; 4932a8cc6c8SYOSHIFUJI Hideaki int err; 4942a8cc6c8SYOSHIFUJI Hideaki 4952a8cc6c8SYOSHIFUJI Hideaki rcu_read_lock(); 4962a8cc6c8SYOSHIFUJI Hideaki hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) { 4973de23255SBenjamin Thery if (idx >= s_idx && 4983de23255SBenjamin Thery net_eq(ip6addrlbl_net(p), net)) { 4992a8cc6c8SYOSHIFUJI Hideaki if ((err = ip6addrlbl_fill(skb, p, 5002a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_table.seq, 5012a8cc6c8SYOSHIFUJI Hideaki NETLINK_CB(cb->skb).pid, 5022a8cc6c8SYOSHIFUJI Hideaki cb->nlh->nlmsg_seq, 5032a8cc6c8SYOSHIFUJI Hideaki RTM_NEWADDRLABEL, 5042a8cc6c8SYOSHIFUJI Hideaki NLM_F_MULTI)) <= 0) 5052a8cc6c8SYOSHIFUJI Hideaki break; 5062a8cc6c8SYOSHIFUJI Hideaki } 5072a8cc6c8SYOSHIFUJI Hideaki idx++; 5082a8cc6c8SYOSHIFUJI Hideaki } 5092a8cc6c8SYOSHIFUJI Hideaki rcu_read_unlock(); 5102a8cc6c8SYOSHIFUJI Hideaki cb->args[0] = idx; 5112a8cc6c8SYOSHIFUJI Hideaki return skb->len; 5122a8cc6c8SYOSHIFUJI Hideaki } 5132a8cc6c8SYOSHIFUJI Hideaki 5142a8cc6c8SYOSHIFUJI Hideaki static inline int ip6addrlbl_msgsize(void) 5152a8cc6c8SYOSHIFUJI Hideaki { 5162a8cc6c8SYOSHIFUJI Hideaki return (NLMSG_ALIGN(sizeof(struct ifaddrlblmsg)) 5172a8cc6c8SYOSHIFUJI Hideaki + nla_total_size(16) /* IFAL_ADDRESS */ 5182a8cc6c8SYOSHIFUJI Hideaki + nla_total_size(4) /* IFAL_LABEL */ 5192a8cc6c8SYOSHIFUJI Hideaki ); 5202a8cc6c8SYOSHIFUJI Hideaki } 5212a8cc6c8SYOSHIFUJI Hideaki 5222a8cc6c8SYOSHIFUJI Hideaki static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh, 5232a8cc6c8SYOSHIFUJI Hideaki void *arg) 5242a8cc6c8SYOSHIFUJI Hideaki { 5253b1e0a65SYOSHIFUJI Hideaki struct net *net = sock_net(in_skb->sk); 5262a8cc6c8SYOSHIFUJI Hideaki struct ifaddrlblmsg *ifal; 5272a8cc6c8SYOSHIFUJI Hideaki struct nlattr *tb[IFAL_MAX+1]; 5282a8cc6c8SYOSHIFUJI Hideaki struct in6_addr *addr; 5292a8cc6c8SYOSHIFUJI Hideaki u32 lseq; 5302a8cc6c8SYOSHIFUJI Hideaki int err = 0; 5312a8cc6c8SYOSHIFUJI Hideaki struct ip6addrlbl_entry *p; 5322a8cc6c8SYOSHIFUJI Hideaki struct sk_buff *skb; 5332a8cc6c8SYOSHIFUJI Hideaki 5342a8cc6c8SYOSHIFUJI Hideaki err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy); 5352a8cc6c8SYOSHIFUJI Hideaki if (err < 0) 5362a8cc6c8SYOSHIFUJI Hideaki return err; 5372a8cc6c8SYOSHIFUJI Hideaki 5382a8cc6c8SYOSHIFUJI Hideaki ifal = nlmsg_data(nlh); 5392a8cc6c8SYOSHIFUJI Hideaki 5402a8cc6c8SYOSHIFUJI Hideaki if (ifal->ifal_family != AF_INET6 || 5412a8cc6c8SYOSHIFUJI Hideaki ifal->ifal_prefixlen != 128) 5422a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 5432a8cc6c8SYOSHIFUJI Hideaki 5442a8cc6c8SYOSHIFUJI Hideaki if (ifal->ifal_index && 5453de23255SBenjamin Thery !__dev_get_by_index(net, ifal->ifal_index)) 5462a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 5472a8cc6c8SYOSHIFUJI Hideaki 5482a8cc6c8SYOSHIFUJI Hideaki if (!tb[IFAL_ADDRESS]) 5492a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 5502a8cc6c8SYOSHIFUJI Hideaki 5512a8cc6c8SYOSHIFUJI Hideaki addr = nla_data(tb[IFAL_ADDRESS]); 5522a8cc6c8SYOSHIFUJI Hideaki if (!addr) 5532a8cc6c8SYOSHIFUJI Hideaki return -EINVAL; 5542a8cc6c8SYOSHIFUJI Hideaki 5552a8cc6c8SYOSHIFUJI Hideaki rcu_read_lock(); 5563de23255SBenjamin Thery p = __ipv6_addr_label(net, addr, ipv6_addr_type(addr), ifal->ifal_index); 5572a8cc6c8SYOSHIFUJI Hideaki if (p && ip6addrlbl_hold(p)) 5582a8cc6c8SYOSHIFUJI Hideaki p = NULL; 5592a8cc6c8SYOSHIFUJI Hideaki lseq = ip6addrlbl_table.seq; 5602a8cc6c8SYOSHIFUJI Hideaki rcu_read_unlock(); 5612a8cc6c8SYOSHIFUJI Hideaki 5622a8cc6c8SYOSHIFUJI Hideaki if (!p) { 5632a8cc6c8SYOSHIFUJI Hideaki err = -ESRCH; 5642a8cc6c8SYOSHIFUJI Hideaki goto out; 5652a8cc6c8SYOSHIFUJI Hideaki } 5662a8cc6c8SYOSHIFUJI Hideaki 5672a8cc6c8SYOSHIFUJI Hideaki if (!(skb = nlmsg_new(ip6addrlbl_msgsize(), GFP_KERNEL))) { 5682a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_put(p); 5692a8cc6c8SYOSHIFUJI Hideaki return -ENOBUFS; 5702a8cc6c8SYOSHIFUJI Hideaki } 5712a8cc6c8SYOSHIFUJI Hideaki 5722a8cc6c8SYOSHIFUJI Hideaki err = ip6addrlbl_fill(skb, p, lseq, 5732a8cc6c8SYOSHIFUJI Hideaki NETLINK_CB(in_skb).pid, nlh->nlmsg_seq, 5742a8cc6c8SYOSHIFUJI Hideaki RTM_NEWADDRLABEL, 0); 5752a8cc6c8SYOSHIFUJI Hideaki 5762a8cc6c8SYOSHIFUJI Hideaki ip6addrlbl_put(p); 5772a8cc6c8SYOSHIFUJI Hideaki 5782a8cc6c8SYOSHIFUJI Hideaki if (err < 0) { 5792a8cc6c8SYOSHIFUJI Hideaki WARN_ON(err == -EMSGSIZE); 5802a8cc6c8SYOSHIFUJI Hideaki kfree_skb(skb); 5812a8cc6c8SYOSHIFUJI Hideaki goto out; 5822a8cc6c8SYOSHIFUJI Hideaki } 5832a8cc6c8SYOSHIFUJI Hideaki 5843de23255SBenjamin Thery err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid); 5852a8cc6c8SYOSHIFUJI Hideaki out: 5862a8cc6c8SYOSHIFUJI Hideaki return err; 5872a8cc6c8SYOSHIFUJI Hideaki } 5882a8cc6c8SYOSHIFUJI Hideaki 5892a8cc6c8SYOSHIFUJI Hideaki void __init ipv6_addr_label_rtnl_register(void) 5902a8cc6c8SYOSHIFUJI Hideaki { 5912a8cc6c8SYOSHIFUJI Hideaki __rtnl_register(PF_INET6, RTM_NEWADDRLABEL, ip6addrlbl_newdel, NULL); 5922a8cc6c8SYOSHIFUJI Hideaki __rtnl_register(PF_INET6, RTM_DELADDRLABEL, ip6addrlbl_newdel, NULL); 5932a8cc6c8SYOSHIFUJI Hideaki __rtnl_register(PF_INET6, RTM_GETADDRLABEL, ip6addrlbl_get, ip6addrlbl_dump); 5942a8cc6c8SYOSHIFUJI Hideaki } 5952a8cc6c8SYOSHIFUJI Hideaki 596