1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * SELinux support for the XFRM LSM hooks 4 * 5 * Author : Trent Jaeger, <jaegert@us.ibm.com> 6 * Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com> 7 */ 8 #ifndef _SELINUX_XFRM_H_ 9 #define _SELINUX_XFRM_H_ 10 11 #include <net/flow.h> 12 13 int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 14 struct xfrm_user_sec_ctx *uctx, 15 gfp_t gfp); 16 int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 17 struct xfrm_sec_ctx **new_ctxp); 18 void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx); 19 int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx); 20 int selinux_xfrm_state_alloc(struct xfrm_state *x, 21 struct xfrm_user_sec_ctx *uctx); 22 int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x, 23 struct xfrm_sec_ctx *polsec, u32 secid); 24 void selinux_xfrm_state_free(struct xfrm_state *x); 25 int selinux_xfrm_state_delete(struct xfrm_state *x); 26 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid); 27 int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x, 28 struct xfrm_policy *xp, 29 const struct flowi_common *flic); 30 31 #ifdef CONFIG_SECURITY_NETWORK_XFRM 32 extern atomic_t selinux_xfrm_refcount; 33 34 static inline int selinux_xfrm_enabled(void) 35 { 36 return (atomic_read(&selinux_xfrm_refcount) > 0); 37 } 38 39 int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb, 40 struct common_audit_data *ad); 41 int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb, 42 struct common_audit_data *ad, u8 proto); 43 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall); 44 int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid); 45 46 static inline void selinux_xfrm_notify_policyload(void) 47 { 48 struct net *net; 49 50 down_read(&net_rwsem); 51 for_each_net(net) 52 rt_genid_bump_all(net); 53 up_read(&net_rwsem); 54 } 55 #else 56 static inline int selinux_xfrm_enabled(void) 57 { 58 return 0; 59 } 60 61 static inline int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb, 62 struct common_audit_data *ad) 63 { 64 return 0; 65 } 66 67 static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb, 68 struct common_audit_data *ad, 69 u8 proto) 70 { 71 return 0; 72 } 73 74 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, 75 int ckall) 76 { 77 *sid = SECSID_NULL; 78 return 0; 79 } 80 81 static inline void selinux_xfrm_notify_policyload(void) 82 { 83 } 84 85 static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid) 86 { 87 *sid = SECSID_NULL; 88 return 0; 89 } 90 #endif 91 92 #endif /* _SELINUX_XFRM_H_ */ 93