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NetLabel: make netlbl_lsm_secattr struct easier/quicker to understand

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The existing netlbl_lsm_secattr struct required the LSM to check all of the
fields to determine if any security attributes were present resulting in a lot
of work in the common case of no attributes.  This patch adds a 'flags' field
which is used to indicate which attributes are present in the structure; this
should allow the LSM to do a quick comparison to determine if the structure
holds any security attributes.

Example:

 if (netlbl_lsm_secattr->flags)
	/* security attributes present */
 else
	/* NO security attributes present */

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Paul Moore
2006-11-17 17:38:46 -05:00
committed by David S. Miller
parent c6fa82a9dd
commit 701a90bad9
4 changed files with 45 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/net/netlabel.h
+11 -2
View File
@@ -111,11 +111,17 @@ struct netlbl_lsm_cache {
void (*free) (const void *data);
void *data;
};
#define NETLBL_SECATTR_NONE 0x00000000
#define NETLBL_SECATTR_DOMAIN 0x00000001
#define NETLBL_SECATTR_CACHE 0x00000002
#define NETLBL_SECATTR_MLS_LVL 0x00000004
#define NETLBL_SECATTR_MLS_CAT 0x00000008
struct netlbl_lsm_secattr {
u32 flags;
char *domain;
u32 mls_lvl;
u32 mls_lvl_vld;
unsigned char *mls_cat;
size_t mls_cat_len;
@@ -174,7 +180,10 @@ static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
*/
static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
{
memset(secattr, 0, sizeof(*secattr));
secattr->flags = 0;
secattr->domain = NULL;
secattr->mls_cat = NULL;
secattr->cache = NULL;
}
/**