2 * Security server interface.
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
8 #ifndef _SELINUX_SECURITY_H_
9 #define _SELINUX_SECURITY_H_
11 #include <linux/dcache.h>
12 #include <linux/magic.h>
13 #include <linux/types.h>
16 #define SECSID_NULL 0x00000000 /* unspecified SID */
17 #define SECSID_WILD 0xffffffff /* wildcard SID */
18 #define SECCLASS_NULL 0x0000 /* no class */
20 /* Identify specific policy version changes */
21 #define POLICYDB_VERSION_BASE 15
22 #define POLICYDB_VERSION_BOOL 16
23 #define POLICYDB_VERSION_IPV6 17
24 #define POLICYDB_VERSION_NLCLASS 18
25 #define POLICYDB_VERSION_VALIDATETRANS 19
26 #define POLICYDB_VERSION_MLS 19
27 #define POLICYDB_VERSION_AVTAB 20
28 #define POLICYDB_VERSION_RANGETRANS 21
29 #define POLICYDB_VERSION_POLCAP 22
30 #define POLICYDB_VERSION_PERMISSIVE 23
31 #define POLICYDB_VERSION_BOUNDARY 24
32 #define POLICYDB_VERSION_FILENAME_TRANS 25
33 #define POLICYDB_VERSION_ROLETRANS 26
34 #define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
35 #define POLICYDB_VERSION_DEFAULT_TYPE 28
37 /* Range of policy versions we understand*/
38 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
39 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
40 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
42 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_DEFAULT_TYPE
45 /* Mask for just the mount related flags */
46 #define SE_MNTMASK 0x1f
47 /* Super block security struct flags for mount options */
48 /* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
49 #define CONTEXT_MNT 0x01
50 #define FSCONTEXT_MNT 0x02
51 #define ROOTCONTEXT_MNT 0x04
52 #define DEFCONTEXT_MNT 0x08
53 #define SBLABEL_MNT 0x10
54 /* Non-mount related flags */
55 #define SE_SBINITIALIZED 0x0100
56 #define SE_SBPROC 0x0200
58 #define CONTEXT_STR "context="
59 #define FSCONTEXT_STR "fscontext="
60 #define ROOTCONTEXT_STR "rootcontext="
61 #define DEFCONTEXT_STR "defcontext="
62 #define LABELSUPP_STR "seclabel"
64 struct netlbl_lsm_secattr;
66 extern int selinux_enabled;
68 /* Policy capabilities */
70 POLICYDB_CAPABILITY_NETPEER,
71 POLICYDB_CAPABILITY_OPENPERM,
72 POLICYDB_CAPABILITY_REDHAT1,
73 POLICYDB_CAPABILITY_ALWAYSNETWORK,
74 __POLICYDB_CAPABILITY_MAX
76 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
78 extern int selinux_policycap_netpeer;
79 extern int selinux_policycap_openperm;
80 extern int selinux_policycap_alwaysnetwork;
83 * type_datum properties
84 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
86 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001
87 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
89 /* limitation of boundary depth */
90 #define POLICYDB_BOUNDS_MAXDEPTH 4
92 int security_mls_enabled(void);
94 int security_load_policy(void *data, size_t len);
95 int security_read_policy(void **data, size_t *len);
96 size_t security_policydb_len(void);
98 int security_policycap_supported(unsigned int req_cap);
100 #define SEL_VEC_MAX 32
109 /* definitions of av_decision.flags */
110 #define AVD_FLAGS_PERMISSIVE 0x0001
112 void security_compute_av(u32 ssid, u32 tsid,
113 u16 tclass, struct av_decision *avd);
115 void security_compute_av_user(u32 ssid, u32 tsid,
116 u16 tclass, struct av_decision *avd);
118 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
119 const struct qstr *qstr, u32 *out_sid);
121 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
122 const char *objname, u32 *out_sid);
124 int security_member_sid(u32 ssid, u32 tsid,
125 u16 tclass, u32 *out_sid);
127 int security_change_sid(u32 ssid, u32 tsid,
128 u16 tclass, u32 *out_sid);
130 int security_sid_to_context(u32 sid, char **scontext,
133 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
135 int security_context_to_sid(const char *scontext, u32 scontext_len,
138 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
139 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
141 int security_context_to_sid_force(const char *scontext, u32 scontext_len,
144 int security_get_user_sids(u32 callsid, char *username,
145 u32 **sids, u32 *nel);
147 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
149 int security_netif_sid(char *name, u32 *if_sid);
151 int security_node_sid(u16 domain, void *addr, u32 addrlen,
154 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
157 int security_bounded_transition(u32 oldsid, u32 newsid);
159 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
161 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
165 int security_get_classes(char ***classes, int *nclasses);
166 int security_get_permissions(char *class, char ***perms, int *nperms);
167 int security_get_reject_unknown(void);
168 int security_get_allow_unknown(void);
170 #define SECURITY_FS_USE_XATTR 1 /* use xattr */
171 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
172 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
173 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
174 #define SECURITY_FS_USE_NONE 5 /* no labeling support */
175 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
177 int security_fs_use(struct super_block *sb);
179 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
182 #ifdef CONFIG_NETLABEL
183 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
186 int security_netlbl_sid_to_secattr(u32 sid,
187 struct netlbl_lsm_secattr *secattr);
189 static inline int security_netlbl_secattr_to_sid(
190 struct netlbl_lsm_secattr *secattr,
196 static inline int security_netlbl_sid_to_secattr(u32 sid,
197 struct netlbl_lsm_secattr *secattr)
201 #endif /* CONFIG_NETLABEL */
203 const char *security_get_initial_sid_context(u32 sid);
206 * status notifier using mmap interface
208 extern struct page *selinux_kernel_status_page(void);
210 #define SELINUX_KERNEL_STATUS_VERSION 1
211 struct selinux_kernel_status {
212 u32 version; /* version number of thie structure */
213 u32 sequence; /* sequence number of seqlock logic */
214 u32 enforcing; /* current setting of enforcing mode */
215 u32 policyload; /* times of policy reloaded */
216 u32 deny_unknown; /* current setting of deny_unknown */
218 * The version > 0 supports above members.
220 } __attribute__((packed));
222 extern void selinux_status_update_setenforce(int enforcing);
223 extern void selinux_status_update_policyload(int seqno);
224 extern void selinux_complete_init(void);
225 extern int selinux_disable(void);
226 extern void exit_sel_fs(void);
227 extern struct path selinux_null;
228 extern struct vfsmount *selinuxfs_mount;
229 extern void selnl_notify_setenforce(int val);
230 extern void selnl_notify_policyload(u32 seqno);
231 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
233 #endif /* _SELINUX_SECURITY_H_ */