mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-30 13:34:44 +08:00
954a8ac0ce
As part of on ongoing effort to perform more automated testing and provide more tools for individual developers to validate their patches before submitting, we are trying to make our code "clang-format clean". My hope is that once we have fixed all of our style "quirks", developers will be able to run clang-format on their patches to help avoid silly formatting problems and ensure their changes fit in well with the rest of the SELinux kernel code. Signed-off-by: Paul Moore <paul@paul-moore.com>
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* An access vector table (avtab) is a hash table
|
|
* of access vectors and transition types indexed
|
|
* by a type pair and a class. An access vector
|
|
* table is used to represent the type enforcement
|
|
* tables.
|
|
*
|
|
* Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
|
|
*/
|
|
|
|
/* Updated: Frank Mayer <mayerf@tresys.com> and
|
|
* Karl MacMillan <kmacmillan@tresys.com>
|
|
* Added conditional policy language extensions
|
|
* Copyright (C) 2003 Tresys Technology, LLC
|
|
*
|
|
* Updated: Yuichi Nakamura <ynakam@hitachisoft.jp>
|
|
* Tuned number of hash slots for avtab to reduce memory usage
|
|
*/
|
|
|
|
#ifndef _SS_AVTAB_H_
|
|
#define _SS_AVTAB_H_
|
|
|
|
#include "security.h"
|
|
|
|
struct avtab_key {
|
|
u16 source_type; /* source type */
|
|
u16 target_type; /* target type */
|
|
u16 target_class; /* target object class */
|
|
#define AVTAB_ALLOWED 0x0001
|
|
#define AVTAB_AUDITALLOW 0x0002
|
|
#define AVTAB_AUDITDENY 0x0004
|
|
#define AVTAB_AV (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)
|
|
#define AVTAB_TRANSITION 0x0010
|
|
#define AVTAB_MEMBER 0x0020
|
|
#define AVTAB_CHANGE 0x0040
|
|
#define AVTAB_TYPE (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
|
|
/* extended permissions */
|
|
#define AVTAB_XPERMS_ALLOWED 0x0100
|
|
#define AVTAB_XPERMS_AUDITALLOW 0x0200
|
|
#define AVTAB_XPERMS_DONTAUDIT 0x0400
|
|
#define AVTAB_XPERMS \
|
|
(AVTAB_XPERMS_ALLOWED | AVTAB_XPERMS_AUDITALLOW | \
|
|
AVTAB_XPERMS_DONTAUDIT)
|
|
#define AVTAB_ENABLED_OLD 0x80000000 /* reserved for used in cond_avtab */
|
|
#define AVTAB_ENABLED 0x8000 /* reserved for used in cond_avtab */
|
|
u16 specified; /* what field is specified */
|
|
};
|
|
|
|
/*
|
|
* For operations that require more than the 32 permissions provided by the avc
|
|
* extended permissions may be used to provide 256 bits of permissions.
|
|
*/
|
|
struct avtab_extended_perms {
|
|
/* These are not flags. All 256 values may be used */
|
|
#define AVTAB_XPERMS_IOCTLFUNCTION 0x01
|
|
#define AVTAB_XPERMS_IOCTLDRIVER 0x02
|
|
/* extension of the avtab_key specified */
|
|
u8 specified; /* ioctl, netfilter, ... */
|
|
/*
|
|
* if 256 bits is not adequate as is often the case with ioctls, then
|
|
* multiple extended perms may be used and the driver field
|
|
* specifies which permissions are included.
|
|
*/
|
|
u8 driver;
|
|
/* 256 bits of permissions */
|
|
struct extended_perms_data perms;
|
|
};
|
|
|
|
struct avtab_datum {
|
|
union {
|
|
u32 data; /* access vector or type value */
|
|
struct avtab_extended_perms *xperms;
|
|
} u;
|
|
};
|
|
|
|
struct avtab_node {
|
|
struct avtab_key key;
|
|
struct avtab_datum datum;
|
|
struct avtab_node *next;
|
|
};
|
|
|
|
struct avtab {
|
|
struct avtab_node **htable;
|
|
u32 nel; /* number of elements */
|
|
u32 nslot; /* number of hash slots */
|
|
u32 mask; /* mask to compute hash func */
|
|
};
|
|
|
|
void avtab_init(struct avtab *h);
|
|
int avtab_alloc(struct avtab *, u32);
|
|
int avtab_alloc_dup(struct avtab *new, const struct avtab *orig);
|
|
void avtab_destroy(struct avtab *h);
|
|
|
|
#define MAX_AVTAB_HASH_BITS 16
|
|
#define MAX_AVTAB_HASH_BUCKETS (1 << MAX_AVTAB_HASH_BITS)
|
|
|
|
#ifdef CONFIG_SECURITY_SELINUX_DEBUG
|
|
void avtab_hash_eval(struct avtab *h, const char *tag);
|
|
#else
|
|
static inline void avtab_hash_eval(struct avtab *h, const char *tag)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
struct policydb;
|
|
int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
|
|
int (*insert)(struct avtab *a, const struct avtab_key *k,
|
|
const struct avtab_datum *d, void *p),
|
|
void *p);
|
|
|
|
int avtab_read(struct avtab *a, void *fp, struct policydb *pol);
|
|
int avtab_write_item(struct policydb *p, const struct avtab_node *cur,
|
|
void *fp);
|
|
int avtab_write(struct policydb *p, struct avtab *a, void *fp);
|
|
|
|
struct avtab_node *avtab_insert_nonunique(struct avtab *h,
|
|
const struct avtab_key *key,
|
|
const struct avtab_datum *datum);
|
|
|
|
struct avtab_node *avtab_search_node(struct avtab *h,
|
|
const struct avtab_key *key);
|
|
struct avtab_node *avtab_search_node_next(struct avtab_node *node,
|
|
u16 specified);
|
|
|
|
#endif /* _SS_AVTAB_H_ */
|