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 #define VIFF_STATIC 0x8000 59 60 struct mfc_cache_cmp_arg { 61 __be32 mfc_mcastgrp; 62 __be32 mfc_origin; 63 }; 64 65 /** 66 * struct mfc_cache - multicast routing entries 67 * @_c: Common multicast routing information; has to be first [for casting] 68 * @mfc_mcastgrp: destination multicast group address 69 * @mfc_origin: source address 70 * @cmparg: used for rhashtable comparisons 71 */ 72 struct mfc_cache { 73 struct mr_mfc _c; 74 union { 75 struct { 76 __be32 mfc_mcastgrp; 77 __be32 mfc_origin; 78 }; 79 struct mfc_cache_cmp_arg cmparg; 80 }; 81 }; 82 83 struct mfc_entry_notifier_info { 84 struct fib_notifier_info info; 85 struct mfc_cache *mfc; 86 u32 tb_id; 87 }; 88 89 struct rtmsg; 90 int ipmr_get_route(struct net *net, struct sk_buff *skb, 91 __be32 saddr, __be32 daddr, 92 struct rtmsg *rtm, u32 portid); 93 94 #ifdef CONFIG_IP_MROUTE 95 void ipmr_cache_free(struct mfc_cache *mfc_cache); 96 #else 97 static inline void ipmr_cache_free(struct mfc_cache *mfc_cache) 98 { 99 } 100 #endif 101 102 static inline void ipmr_cache_put(struct mfc_cache *c) 103 { 104 if (refcount_dec_and_test(&c->_c.mfc_un.res.refcount)) 105 ipmr_cache_free(c); 106 } 107 static inline void ipmr_cache_hold(struct mfc_cache *c) 108 { 109 refcount_inc(&c->_c.mfc_un.res.refcount); 110 } 111 112 #endif 113