3f0882c482
Instead of declaring the entire selinux_audit_data on the stack when we start an operation on declare it on the stack if we are going to use it. We know it's usefulness at the end of the security decision and can declare it there. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
133 lines
2.9 KiB
C
133 lines
2.9 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 "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 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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* We only need this data after we have decided to send an audit message.
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*/
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struct selinux_late_audit_data {
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u32 ssid;
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u32 tsid;
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u16 tclass;
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u32 requested;
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u32 audited;
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u32 denied;
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int result;
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};
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/*
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* We collect this at the beginning or during an selinux security operation
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*/
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struct selinux_audit_data {
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/*
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* auditdeny is a bit tricky and unintuitive. See the
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* comments in avc.c for it's meaning and usage.
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*/
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u32 auditdeny;
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struct selinux_late_audit_data *slad;
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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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int 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, unsigned flags);
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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_flags(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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unsigned);
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static inline 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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{
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return avc_has_perm_flags(ssid, tsid, tclass, requested, auditdata, 0);
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}
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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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