1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_MROUTE_H 3 #define __LINUX_MROUTE_H 4 5 #include <linux/in.h> 6 #include <linux/pim.h> 7 #include <linux/rhashtable.h> 8 #include <net/sock.h> 9 #include <net/fib_rules.h> 10 #include <net/fib_notifier.h> 11 #include <uapi/linux/mroute.h> 12 13 #ifdef CONFIG_IP_MROUTE 14 static inline int ip_mroute_opt(int opt) 15 { 16 return opt >= MRT_BASE && opt <= MRT_MAX; 17 } 18 19 int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int); 20 int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *); 21 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg); 22 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 23 int ip_mr_init(void); 24 bool ipmr_rule_default(const struct fib_rule *rule); 25 #else 26 static inline int ip_mroute_setsockopt(struct sock *sock, int optname, 27 char __user *optval, unsigned int optlen) 28 { 29 return -ENOPROTOOPT; 30 } 31 32 static inline int ip_mroute_getsockopt(struct sock *sock, int optname, 33 char __user *optval, int __user *optlen) 34 { 35 return -ENOPROTOOPT; 36 } 37 38 static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 39 { 40 return -ENOIOCTLCMD; 41 } 42 43 static inline int ip_mr_init(void) 44 { 45 return 0; 46 } 47 48 static inline int ip_mroute_opt(int opt) 49 { 50 return 0; 51 } 52 53 static inline bool ipmr_rule_default(const struct fib_rule *rule) 54 { 55 return true; 56 } 57 #endif 58 59 struct vif_device { 60 struct net_device *dev; /* Device we are using */ 61 struct netdev_phys_item_id dev_parent_id; /* Device parent ID */ 62 unsigned long bytes_in,bytes_out; 63 unsigned long pkt_in,pkt_out; /* Statistics */ 64 unsigned long rate_limit; /* Traffic shaping (NI) */ 65 unsigned char threshold; /* TTL threshold */ 66 unsigned short flags; /* Control flags */ 67 __be32 local,remote; /* Addresses(remote for tunnels)*/ 68 int link; /* Physical interface index */ 69 }; 70 71 struct vif_entry_notifier_info { 72 struct fib_notifier_info info; 73 struct net_device *dev; 74 vifi_t vif_index; 75 unsigned short vif_flags; 76 u32 tb_id; 77 }; 78 79 #define VIFF_STATIC 0x8000 80 81 #define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL) 82 83 struct mr_table { 84 struct list_head list; 85 possible_net_t net; 86 u32 id; 87 struct sock __rcu *mroute_sk; 88 struct timer_list ipmr_expire_timer; 89 struct list_head mfc_unres_queue; 90 struct vif_device vif_table[MAXVIFS]; 91 struct rhltable mfc_hash; 92 struct list_head mfc_cache_list; 93 int maxvif; 94 atomic_t cache_resolve_queue_len; 95 bool mroute_do_assert; 96 bool mroute_do_pim; 97 int mroute_reg_vif_num; 98 }; 99 100 /* mfc_flags: 101 * MFC_STATIC - the entry was added statically (not by a routing daemon) 102 * MFC_OFFLOAD - the entry was offloaded to the hardware 103 */ 104 enum { 105 MFC_STATIC = BIT(0), 106 MFC_OFFLOAD = BIT(1), 107 }; 108 109 struct mfc_cache_cmp_arg { 110 __be32 mfc_mcastgrp; 111 __be32 mfc_origin; 112 }; 113 114 /** 115 * struct mfc_cache - multicast routing entries 116 * @mnode: rhashtable list 117 * @mfc_mcastgrp: destination multicast group address 118 * @mfc_origin: source address 119 * @cmparg: used for rhashtable comparisons 120 * @mfc_parent: source interface (iif) 121 * @mfc_flags: entry flags 122 * @expires: unresolved entry expire time 123 * @unresolved: unresolved cached skbs 124 * @last_assert: time of last assert 125 * @minvif: minimum VIF id 126 * @maxvif: maximum VIF id 127 * @bytes: bytes that have passed for this entry 128 * @pkt: packets that have passed for this entry 129 * @wrong_if: number of wrong source interface hits 130 * @lastuse: time of last use of the group (traffic or update) 131 * @ttls: OIF TTL threshold array 132 * @refcount: reference count for this entry 133 * @list: global entry list 134 * @rcu: used for entry destruction 135 */ 136 struct mfc_cache { 137 struct rhlist_head mnode; 138 union { 139 struct { 140 __be32 mfc_mcastgrp; 141 __be32 mfc_origin; 142 }; 143 struct mfc_cache_cmp_arg cmparg; 144 }; 145 vifi_t mfc_parent; 146 int mfc_flags; 147 148 union { 149 struct { 150 unsigned long expires; 151 struct sk_buff_head unresolved; 152 } unres; 153 struct { 154 unsigned long last_assert; 155 int minvif; 156 int maxvif; 157 unsigned long bytes; 158 unsigned long pkt; 159 unsigned long wrong_if; 160 unsigned long lastuse; 161 unsigned char ttls[MAXVIFS]; 162 refcount_t refcount; 163 } res; 164 } mfc_un; 165 struct list_head list; 166 struct rcu_head rcu; 167 }; 168 169 struct mfc_entry_notifier_info { 170 struct fib_notifier_info info; 171 struct mfc_cache *mfc; 172 u32 tb_id; 173 }; 174 175 struct rtmsg; 176 int ipmr_get_route(struct net *net, struct sk_buff *skb, 177 __be32 saddr, __be32 daddr, 178 struct rtmsg *rtm, u32 portid); 179 180 #ifdef CONFIG_IP_MROUTE 181 void ipmr_cache_free(struct mfc_cache *mfc_cache); 182 #else 183 static inline void ipmr_cache_free(struct mfc_cache *mfc_cache) 184 { 185 } 186 #endif 187 188 static inline void ipmr_cache_put(struct mfc_cache *c) 189 { 190 if (refcount_dec_and_test(&c->mfc_un.res.refcount)) 191 ipmr_cache_free(c); 192 } 193 static inline void ipmr_cache_hold(struct mfc_cache *c) 194 { 195 refcount_inc(&c->mfc_un.res.refcount); 196 } 197 198 #endif 199