2 * SELinux services exported to the rest of the kernel.
4 * Author: James Morris <jmorris@redhat.com>
6 * Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 * Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
8 * Copyright (C) 2006 IBM Corporation, Timothy R. Chavez <tinytim@us.ibm.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2,
12 * as published by the Free Software Foundation.
14 #ifndef _LINUX_SELINUX_H
15 #define _LINUX_SELINUX_H
17 struct selinux_audit_rule;
22 #ifdef CONFIG_SECURITY_SELINUX
25 * selinux_audit_rule_init - alloc/init an selinux audit rule structure.
26 * @field: the field this rule refers to
27 * @op: the operater the rule uses
28 * @rulestr: the text "target" of the rule
29 * @rule: pointer to the new rule structure returned via this
31 * Returns 0 if successful, -errno if not. On success, the rule structure
32 * will be allocated internally. The caller must free this structure with
33 * selinux_audit_rule_free() after use.
35 int selinux_audit_rule_init(u32 field, u32 op, char *rulestr,
36 struct selinux_audit_rule **rule);
39 * selinux_audit_rule_free - free an selinux audit rule structure.
40 * @rule: pointer to the audit rule to be freed
42 * This will free all memory associated with the given rule.
43 * If @rule is NULL, no operation is performed.
45 void selinux_audit_rule_free(struct selinux_audit_rule *rule);
48 * selinux_audit_rule_match - determine if a context ID matches a rule.
49 * @sid: the context ID to check
50 * @field: the field this rule refers to
51 * @op: the operater the rule uses
52 * @rule: pointer to the audit rule to check against
53 * @actx: the audit context (can be NULL) associated with the check
55 * Returns 1 if the context id matches the rule, 0 if it does not, and
58 int selinux_audit_rule_match(u32 sid, u32 field, u32 op,
59 struct selinux_audit_rule *rule,
60 struct audit_context *actx);
63 * selinux_audit_set_callback - set the callback for policy reloads.
64 * @callback: the function to call when the policy is reloaded
66 * This sets the function callback function that will update the rules
67 * upon policy reloads. This callback should rebuild all existing rules
68 * using selinux_audit_rule_init().
70 void selinux_audit_set_callback(int (*callback)(void));
73 * selinux_sid_to_string - map a security context ID to a string
74 * @sid: security context ID to be converted.
75 * @ctx: address of context string to be returned
76 * @ctxlen: length of returned context string.
78 * Returns 0 if successful, -errno if not. On success, the context
79 * string will be allocated internally, and the caller must call
80 * kfree() on it after use.
82 int selinux_sid_to_string(u32 sid, char **ctx, u32 *ctxlen);
85 * selinux_get_inode_sid - get the inode's security context ID
86 * @inode: inode structure to get the sid from.
87 * @sid: pointer to security context ID to be filled in.
91 void selinux_get_inode_sid(const struct inode *inode, u32 *sid);
94 * selinux_get_ipc_sid - get the ipc security context ID
95 * @ipcp: ipc structure to get the sid from.
96 * @sid: pointer to security context ID to be filled in.
100 void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid);
103 * selinux_get_task_sid - return the SID of task
104 * @tsk: the task whose SID will be returned
105 * @sid: pointer to security context ID to be filled in.
109 void selinux_get_task_sid(struct task_struct *tsk, u32 *sid);
112 * selinux_string_to_sid - map a security context string to a security ID
113 * @str: the security context string to be mapped
114 * @sid: ID value returned via this.
116 * Returns 0 if successful, with the SID stored in sid. A value
117 * of zero for sid indicates no SID could be determined (but no error
120 int selinux_string_to_sid(char *str, u32 *sid);
123 * selinux_secmark_relabel_packet_permission - secmark permission check
124 * @sid: SECMARK ID value to be applied to network packet
126 * Returns 0 if the current task is allowed to set the SECMARK label of
127 * packets with the supplied security ID. Note that it is implicit that
128 * the packet is always being relabeled from the default unlabeled value,
129 * and that the access control decision is made in the AVC.
131 int selinux_secmark_relabel_packet_permission(u32 sid);
134 * selinux_secmark_refcount_inc - increments the secmark use counter
136 * SELinux keeps track of the current SECMARK targets in use so it knows
137 * when to apply SECMARK label access checks to network packets. This
138 * function incements this reference count to indicate that a new SECMARK
139 * target has been configured.
141 void selinux_secmark_refcount_inc(void);
144 * selinux_secmark_refcount_dec - decrements the secmark use counter
146 * SELinux keeps track of the current SECMARK targets in use so it knows
147 * when to apply SECMARK label access checks to network packets. This
148 * function decements this reference count to indicate that one of the
149 * existing SECMARK targets has been removed/flushed.
151 void selinux_secmark_refcount_dec(void);
154 static inline int selinux_audit_rule_init(u32 field, u32 op,
156 struct selinux_audit_rule **rule)
161 static inline void selinux_audit_rule_free(struct selinux_audit_rule *rule)
166 static inline int selinux_audit_rule_match(u32 sid, u32 field, u32 op,
167 struct selinux_audit_rule *rule,
168 struct audit_context *actx)
173 static inline void selinux_audit_set_callback(int (*callback)(void))
178 static inline int selinux_sid_to_string(u32 sid, char **ctx, u32 *ctxlen)
185 static inline void selinux_get_inode_sid(const struct inode *inode, u32 *sid)
190 static inline void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid)
195 static inline void selinux_get_task_sid(struct task_struct *tsk, u32 *sid)
200 static inline int selinux_string_to_sid(const char *str, u32 *sid)
206 static inline int selinux_secmark_relabel_packet_permission(u32 sid)
211 static inline void selinux_secmark_refcount_inc(void)
216 static inline void selinux_secmark_refcount_dec(void)
221 #endif /* CONFIG_SECURITY_SELINUX */
223 #endif /* _LINUX_SELINUX_H */