コード例 #1
0
ファイル: avtab.c プロジェクト: 19Dan01/linux
/* This search function returns a node pointer, and can be used in
 * conjunction with avtab_search_next_node()
 */
struct avtab_node*
avtab_search_node(struct avtab *h, struct avtab_key *key)
{
	int hvalue;
	struct avtab_node *cur;
	u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return NULL;

	hvalue = avtab_hash(key, h->mask);
	for (cur = flex_array_get_ptr(h->htable, hvalue); cur;
	     cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified))
			return cur;

		if (key->source_type < cur->key.source_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type < cur->key.target_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class < cur->key.target_class)
			break;
	}
	return NULL;
}
コード例 #2
0
ファイル: avtab.c プロジェクト: 19Dan01/linux
static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
{
	int hvalue;
	struct avtab_node *prev, *cur, *newnode;
	u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return -EINVAL;

	hvalue = avtab_hash(key, h->mask);
	for (prev = NULL, cur = flex_array_get_ptr(h->htable, hvalue);
	     cur;
	     prev = cur, cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified))
			return -EEXIST;
		if (key->source_type < cur->key.source_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type < cur->key.target_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class < cur->key.target_class)
			break;
	}

	newnode = avtab_insert_node(h, hvalue, prev, cur, key, datum);
	if (!newnode)
		return -ENOMEM;

	return 0;
}
コード例 #3
0
ファイル: avtab.c プロジェクト: miettal/armadillo420_standard
/* Unlike avtab_insert(), this function allow multiple insertions of the same
 * key/specified mask into the table, as needed by the conditional avtab.
 * It also returns a pointer to the node inserted.
 */
struct avtab_node *
avtab_insert_nonunique(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
{
	int hvalue;
	struct avtab_node *prev, *cur, *newnode;
	u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return NULL;
	hvalue = avtab_hash(key, h->mask);
	for (prev = NULL, cur = h->htable[hvalue];
	     cur;
	     prev = cur, cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified))
			break;
		if (key->source_type < cur->key.source_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type < cur->key.target_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class < cur->key.target_class)
			break;
	}
	newnode = avtab_insert_node(h, hvalue, prev, cur, key, datum);

	return newnode;
}
コード例 #4
0
ファイル: avtab.c プロジェクト: nirs/selinux
/* This search function returns a node pointer, and can be used in
 * conjunction with avtab_search_next_node()
 */
avtab_ptr_t avtab_search_node(avtab_t * h, avtab_key_t * key)
{
	int hvalue;
	avtab_ptr_t cur;
	uint16_t specified =
	    key->specified & ~(AVTAB_ENABLED | AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return NULL;

	hvalue = avtab_hash(key, h->mask);
	for (cur = h->htable[hvalue]; cur; cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified))
			return cur;

		if (key->source_type < cur->key.source_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type < cur->key.target_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class < cur->key.target_class)
			break;
	}
	return NULL;
}
コード例 #5
0
ファイル: avtab.c プロジェクト: nirs/selinux
/* Unlike avtab_insert(), this function allow multiple insertions of the same 
 * key/specified mask into the table, as needed by the conditional avtab.  
 * It also returns a pointer to the node inserted.
 */
avtab_ptr_t
avtab_insert_nonunique(avtab_t * h, avtab_key_t * key, avtab_datum_t * datum)
{
	int hvalue;
	avtab_ptr_t prev, cur, newnode;
	uint16_t specified =
	    key->specified & ~(AVTAB_ENABLED | AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return NULL;
	hvalue = avtab_hash(key, h->mask);
	for (prev = NULL, cur = h->htable[hvalue];
	     cur; prev = cur, cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified))
			break;
		if (key->source_type < cur->key.source_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type < cur->key.target_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class < cur->key.target_class)
			break;
	}
	newnode = avtab_insert_node(h, hvalue, prev, key, datum);

	return newnode;
}
コード例 #6
0
ファイル: avtab.c プロジェクト: apcwowo/setools-android
int avtab_remove(avtab_t * h, avtab_key_t * key)
{
	int hvalue;
	avtab_ptr_t prev, cur;
	int found = 0;
	uint16_t specified =
	    key->specified & ~(AVTAB_ENABLED | AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return SEPOL_ENOMEM;

	hvalue = avtab_hash(key, h->mask);
	for (prev = NULL, cur = h->htable[hvalue];
	     cur; prev = cur, cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified)) {
			found = 1;
			break;
		}

	}
	if (found)
		avtab_remove_node(h, hvalue, prev);

	return 0;
}
コード例 #7
0
ファイル: avtab.c プロジェクト: nirs/selinux
int avtab_insert(avtab_t * h, avtab_key_t * key, avtab_datum_t * datum)
{
	int hvalue;
	avtab_ptr_t prev, cur, newnode;
	uint16_t specified =
	    key->specified & ~(AVTAB_ENABLED | AVTAB_ENABLED_OLD);

	if (!h || !h->htable)
		return SEPOL_ENOMEM;

	hvalue = avtab_hash(key, h->mask);
	for (prev = NULL, cur = h->htable[hvalue];
	     cur; prev = cur, cur = cur->next) {
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class == cur->key.target_class &&
		    (specified & cur->key.specified)) {
			/* Extended permissions are not necessarily unique */
			if (specified & AVTAB_XPERMS)
				break;
			return SEPOL_EEXIST;
		}
		if (key->source_type < cur->key.source_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type < cur->key.target_type)
			break;
		if (key->source_type == cur->key.source_type &&
		    key->target_type == cur->key.target_type &&
		    key->target_class < cur->key.target_class)
			break;
	}

	newnode = avtab_insert_node(h, hvalue, prev, key, datum);
	if (!newnode)
		return SEPOL_ENOMEM;

	return 0;
}