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 <net/fib_rules.h> 8 #include <net/fib_notifier.h> 9 #include <uapi/linux/mroute.h> 10 #include <linux/mroute_base.h> 11 12 #ifdef CONFIG_IP_MROUTE 13 static inline int ip_mroute_opt(int opt) 14 { 15 return opt >= MRT_BASE && opt <= MRT_MAX; 16 } 17 18 int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int); 19 int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *); 20 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg); 21 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 22 int ip_mr_init(void); 23 bool ipmr_rule_default(const struct fib_rule *rule); 24 #else 25 static inline int ip_mroute_setsockopt(struct sock *sock, int optname, 26 char __user *optval, unsigned int optlen) 27 { 28 return -ENOPROTOOPT; 29 } 30 31 static inline int ip_mroute_getsockopt(struct sock *sock, int optname, 32 char __user *optval, int __user *optlen) 33 { 34 return -ENOPROTOOPT; 35 } 36 37 static inline int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 38 { 39 return -ENOIOCTLCMD; 40 } 41 42 static inline int ip_mr_init(void) 43 { 44 return 0; 45 } 46 47 static inline int ip_mroute_opt(int opt) 48 { 49 return 0; 50 } 51 52 static inline bool ipmr_rule_default(const struct fib_rule *rule) 53 { 54 return true; 55 } 56 #endif 57 58 struct vif_entry_notifier_info { 59 struct fib_notifier_info info; 60 struct net_device *dev; 61 vifi_t vif_index; 62 unsigned short vif_flags; 63 u32 tb_id; 64 }; 65 66 #define VIFF_STATIC 0x8000 67 68 struct mfc_cache_cmp_arg { 69 __be32 mfc_mcastgrp; 70 __be32 mfc_origin; 71 }; 72 73 /** 74 * struct mfc_cache - multicast routing entries 75 * @_c: Common multicast routing information; has to be first [for casting] 76 * @mfc_mcastgrp: destination multicast group address 77 * @mfc_origin: source address 78 * @cmparg: used for rhashtable comparisons 79 */ 80 struct mfc_cache { 81 struct mr_mfc _c; 82 union { 83 struct { 84 __be32 mfc_mcastgrp; 85 __be32 mfc_origin; 86 }; 87 struct mfc_cache_cmp_arg cmparg; 88 }; 89 }; 90 91 struct mfc_entry_notifier_info { 92 struct fib_notifier_info info; 93 struct mfc_cache *mfc; 94 u32 tb_id; 95 }; 96 97 struct rtmsg; 98 int ipmr_get_route(struct net *net, struct sk_buff *skb, 99 __be32 saddr, __be32 daddr, 100 struct rtmsg *rtm, u32 portid); 101 102 #ifdef CONFIG_IP_MROUTE 103 void ipmr_cache_free(struct mfc_cache *mfc_cache); 104 #else 105 static inline void ipmr_cache_free(struct mfc_cache *mfc_cache) 106 { 107 } 108 #endif 109 110 static inline void ipmr_cache_put(struct mfc_cache *c) 111 { 112 if (refcount_dec_and_test(&c->_c.mfc_un.res.refcount)) 113 ipmr_cache_free(c); 114 } 115 static inline void ipmr_cache_hold(struct mfc_cache *c) 116 { 117 refcount_inc(&c->_c.mfc_un.res.refcount); 118 } 119 120 #endif 121