2bf4969032
Convert avc_audit in security/selinux/avc.c to use lsm_audit.h,
for better maintainability.
- changed selinux to use common_audit_data instead of
avc_audit_data
- eliminated code in avc.c and used code from lsm_audit.h instead.
Had to add a LSM_AUDIT_NO_AUDIT to lsm_audit.h so that avc_audit
can call common_lsm_audit and do the pre and post callbacks without
doing the actual dump. This makes it so that the patched version
behaves the same way as the unpatched version.
Also added a denied field to the selinux_audit_data private space,
once again to make it so that the patched version behaves like the
unpatched.
I've tested and confirmed that AVCs look the same before and after
this patch.
Signed-off-by: Thomas Liu <tliu@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/*
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* Access vector cache interface for object managers.
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*
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* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
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*/
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#ifndef _SELINUX_AVC_H_
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#define _SELINUX_AVC_H_
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#include <linux/stddef.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/kdev_t.h>
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#include <linux/spinlock.h>
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#include <linux/init.h>
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#include <linux/audit.h>
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#include <linux/lsm_audit.h>
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#include <linux/in6.h>
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#include <linux/path.h>
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#include <asm/system.h>
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#include "flask.h"
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#include "av_permissions.h"
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#include "security.h"
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#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
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extern int selinux_enforcing;
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#else
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#define selinux_enforcing 1
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#endif
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/*
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* An entry in the AVC.
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*/
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struct avc_entry;
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struct task_struct;
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struct inode;
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struct sock;
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struct sk_buff;
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/*
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* AVC statistics
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*/
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struct avc_cache_stats {
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unsigned int lookups;
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unsigned int hits;
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unsigned int misses;
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unsigned int allocations;
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unsigned int reclaims;
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unsigned int frees;
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};
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/*
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* AVC operations
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*/
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void __init avc_init(void);
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void avc_audit(u32 ssid, u32 tsid,
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u16 tclass, u32 requested,
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struct av_decision *avd,
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int result,
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struct common_audit_data *a);
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#define AVC_STRICT 1 /* Ignore permissive mode. */
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int avc_has_perm_noaudit(u32 ssid, u32 tsid,
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u16 tclass, u32 requested,
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unsigned flags,
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struct av_decision *avd);
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int avc_has_perm(u32 ssid, u32 tsid,
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u16 tclass, u32 requested,
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struct common_audit_data *auditdata);
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u32 avc_policy_seqno(void);
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#define AVC_CALLBACK_GRANT 1
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#define AVC_CALLBACK_TRY_REVOKE 2
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#define AVC_CALLBACK_REVOKE 4
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#define AVC_CALLBACK_RESET 8
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#define AVC_CALLBACK_AUDITALLOW_ENABLE 16
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#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
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#define AVC_CALLBACK_AUDITDENY_ENABLE 64
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#define AVC_CALLBACK_AUDITDENY_DISABLE 128
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int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
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u16 tclass, u32 perms,
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u32 *out_retained),
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u32 events, u32 ssid, u32 tsid,
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u16 tclass, u32 perms);
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/* Exported to selinuxfs */
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int avc_get_hash_stats(char *page);
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extern unsigned int avc_cache_threshold;
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/* Attempt to free avc node cache */
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void avc_disable(void);
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#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
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DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
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#endif
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#endif /* _SELINUX_AVC_H_ */
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