| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * SELinux support for the XFRM LSM hooks |
| 3 | * |
| 4 | * Author : Trent Jaeger, <jaegert@us.ibm.com> |
| 5 | * Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com> |
| 6 | */ |
| 7 | #ifndef _SELINUX_XFRM_H_ |
| 8 | #define _SELINUX_XFRM_H_ |
| 9 | |
| 10 | #include <net/flow.h> |
| 11 | |
| 12 | int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, |
| 13 | struct xfrm_user_sec_ctx *sec_ctx); |
| 14 | int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, |
| 15 | struct xfrm_sec_ctx **new_ctxp); |
| 16 | void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx); |
| 17 | int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx); |
| 18 | int selinux_xfrm_state_alloc(struct xfrm_state *x, |
| 19 | struct xfrm_user_sec_ctx *sec_ctx, u32 secid); |
| 20 | void selinux_xfrm_state_free(struct xfrm_state *x); |
| 21 | int selinux_xfrm_state_delete(struct xfrm_state *x); |
| 22 | int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir); |
| 23 | int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x, |
| 24 | struct xfrm_policy *xp, const struct flowi *fl); |
| 25 | |
| 26 | /* |
| 27 | * Extract the security blob from the sock (it's actually on the socket) |
| 28 | */ |
| 29 | static inline struct inode_security_struct *get_sock_isec(struct sock *sk) |
| 30 | { |
| 31 | if (!sk->sk_socket) |
| 32 | return NULL; |
| 33 | |
| 34 | return SOCK_INODE(sk->sk_socket)->i_security; |
| 35 | } |
| 36 | |
| 37 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 38 | extern atomic_t selinux_xfrm_refcount; |
| 39 | |
| 40 | static inline int selinux_xfrm_enabled(void) |
| 41 | { |
| 42 | return (atomic_read(&selinux_xfrm_refcount) > 0); |
| 43 | } |
| 44 | |
| 45 | int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb, |
| 46 | struct common_audit_data *ad); |
| 47 | int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb, |
| 48 | struct common_audit_data *ad, u8 proto); |
| 49 | int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall); |
| 50 | int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid); |
| 51 | |
| 52 | static inline void selinux_xfrm_notify_policyload(void) |
| 53 | { |
| 54 | atomic_inc(&flow_cache_genid); |
| 55 | } |
| 56 | #else |
| 57 | static inline int selinux_xfrm_enabled(void) |
| 58 | { |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb, |
| 63 | struct common_audit_data *ad) |
| 64 | { |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb, |
| 69 | struct common_audit_data *ad, u8 proto) |
| 70 | { |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall) |
| 75 | { |
| 76 | *sid = SECSID_NULL; |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static inline void selinux_xfrm_notify_policyload(void) |
| 81 | { |
| 82 | } |
| 83 | |
| 84 | static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid) |
| 85 | { |
| 86 | *sid = SECSID_NULL; |
| 87 | return 0; |
| 88 | } |
| 89 | #endif |
| 90 | |
| 91 | #endif /* _SELINUX_XFRM_H_ */ |