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marcus.erl |
/*
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* SELinux services exported to the rest of the kernel.
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*
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* Author: James Morris <jmorris@redhat.com>
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*
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* Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
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* Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
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* Copyright (C) 2006 IBM Corporation, Timothy R. Chavez <tinytim@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2,
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* as published by the Free Software Foundation.
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*/
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#ifndef _LINUX_SELINUX_H
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#define _LINUX_SELINUX_H
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struct selinux_audit_rule;
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struct audit_context;
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struct inode;
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struct kern_ipc_perm;
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#ifdef CONFIG_SECURITY_SELINUX
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/**
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* selinux_audit_rule_init - alloc/init an selinux audit rule structure.
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* @field: the field this rule refers to
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* @op: the operater the rule uses
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* @rulestr: the text "target" of the rule
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* @rule: pointer to the new rule structure returned via this
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*
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* Returns 0 if successful, -errno if not. On success, the rule structure
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* will be allocated internally. The caller must free this structure with
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* selinux_audit_rule_free() after use.
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*/
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int selinux_audit_rule_init(u32 field, u32 op, char *rulestr,
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struct selinux_audit_rule **rule);
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/**
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* selinux_audit_rule_free - free an selinux audit rule structure.
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* @rule: pointer to the audit rule to be freed
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*
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* This will free all memory associated with the given rule.
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* If @rule is NULL, no operation is performed.
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*/
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void selinux_audit_rule_free(struct selinux_audit_rule *rule);
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/**
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* selinux_audit_rule_match - determine if a context ID matches a rule.
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* @sid: the context ID to check
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* @field: the field this rule refers to
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* @op: the operater the rule uses
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* @rule: pointer to the audit rule to check against
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* @actx: the audit context (can be NULL) associated with the check
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*
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* Returns 1 if the context id matches the rule, 0 if it does not, and
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* -errno on failure.
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*/
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int selinux_audit_rule_match(u32 sid, u32 field, u32 op,
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struct selinux_audit_rule *rule,
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struct audit_context *actx);
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/**
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* selinux_audit_set_callback - set the callback for policy reloads.
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* @callback: the function to call when the policy is reloaded
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*
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* This sets the function callback function that will update the rules
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* upon policy reloads. This callback should rebuild all existing rules
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* using selinux_audit_rule_init().
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*/
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void selinux_audit_set_callback(int (*callback)(void));
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/**
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* selinux_sid_to_string - map a security context ID to a string
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* @sid: security context ID to be converted.
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* @ctx: address of context string to be returned
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* @ctxlen: length of returned context string.
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*
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* Returns 0 if successful, -errno if not. On success, the context
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* string will be allocated internally, and the caller must call
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* kfree() on it after use.
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*/
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int selinux_sid_to_string(u32 sid, char **ctx, u32 *ctxlen);
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/**
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* selinux_get_inode_sid - get the inode's security context ID
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* @inode: inode structure to get the sid from.
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* @sid: pointer to security context ID to be filled in.
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*
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* Returns nothing
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*/
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void selinux_get_inode_sid(const struct inode *inode, u32 *sid);
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/**
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* selinux_get_ipc_sid - get the ipc security context ID
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* @ipcp: ipc structure to get the sid from.
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* @sid: pointer to security context ID to be filled in.
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*
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* Returns nothing
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*/
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void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid);
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/**
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* selinux_get_task_sid - return the SID of task
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* @tsk: the task whose SID will be returned
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* @sid: pointer to security context ID to be filled in.
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*
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* Returns nothing
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*/
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void selinux_get_task_sid(struct task_struct *tsk, u32 *sid);
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/**
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* selinux_string_to_sid - map a security context string to a security ID
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* @str: the security context string to be mapped
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* @sid: ID value returned via this.
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*
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* Returns 0 if successful, with the SID stored in sid. A value
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* of zero for sid indicates no SID could be determined (but no error
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* occurred).
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*/
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int selinux_string_to_sid(char *str, u32 *sid);
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/**
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* selinux_relabel_packet_permission - check permission to relabel a packet
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* @sid: ID value to be applied to network packet (via SECMARK, most likely)
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*
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* Returns 0 if the current task is allowed to label packets with the
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* supplied security ID. Note that it is implicit that the packet is always
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* being relabeled from the default unlabled value, and that the access
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* control decision is made in the AVC.
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*/
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int selinux_relabel_packet_permission(u32 sid);
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#else
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static inline int selinux_audit_rule_init(u32 field, u32 op,
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char *rulestr,
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struct selinux_audit_rule **rule)
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{
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return -EOPNOTSUPP;
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}
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static inline void selinux_audit_rule_free(struct selinux_audit_rule *rule)
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{
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return;
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}
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static inline int selinux_audit_rule_match(u32 sid, u32 field, u32 op,
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struct selinux_audit_rule *rule,
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struct audit_context *actx)
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{
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return 0;
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}
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static inline void selinux_audit_set_callback(int (*callback)(void))
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{
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return;
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}
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static inline int selinux_sid_to_string(u32 sid, char **ctx, u32 *ctxlen)
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{
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*ctx = NULL;
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*ctxlen = 0;
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return 0;
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}
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static inline void selinux_get_inode_sid(const struct inode *inode, u32 *sid)
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{
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*sid = 0;
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}
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static inline void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid)
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{
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*sid = 0;
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}
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static inline void selinux_get_task_sid(struct task_struct *tsk, u32 *sid)
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{
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*sid = 0;
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}
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static inline int selinux_string_to_sid(const char *str, u32 *sid)
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{
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*sid = 0;
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return 0;
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}
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static inline int selinux_relabel_packet_permission(u32 sid)
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{
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return 0;
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}
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#endif /* CONFIG_SECURITY_SELINUX */
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#endif /* _LINUX_SELINUX_H */
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