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authorEric Paris <eparis@redhat.com>2012-04-03 09:37:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-03 09:48:40 -0700
commit3b3b0e4fc15efa507b902d90cea39e496a523c3b (patch)
treed7b91c21ad6c6f4ac21dd51297b74eec47c61684 /security/smack/smack.h
parent95694129b43165911dc4e8a972f0d39ad98d86be (diff)
downloadlinux-linaro-stable-3b3b0e4fc15efa507b902d90cea39e496a523c3b.tar.gz
LSM: shrink sizeof LSM specific portion of common_audit_data
Linus found that the gigantic size of the common audit data caused a big perf hit on something as simple as running stat() in a loop. This patch requires LSMs to declare the LSM specific portion separately rather than doing it in a union. Thus each LSM can be responsible for shrinking their portion and don't have to pay a penalty just because other LSMs have a bigger space requirement. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/smack/smack.h')
-rw-r--r--security/smack/smack.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 2ad00657b801..ccba3823d9ef 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -185,6 +185,15 @@ struct smack_known {
*/
#define SMK_NUM_ACCESS_TYPE 5
+/* SMACK data */
+struct smack_audit_data {
+ const char *function;
+ char *subject;
+ char *object;
+ char *request;
+ int result;
+};
+
/*
* Smack audit data; is empty if CONFIG_AUDIT not set
* to save some stack
@@ -192,6 +201,7 @@ struct smack_known {
struct smk_audit_info {
#ifdef CONFIG_AUDIT
struct common_audit_data a;
+ struct smack_audit_data sad;
#endif
};
/*
@@ -311,7 +321,8 @@ static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
{
memset(a, 0, sizeof(*a));
a->a.type = type;
- a->a.smack_audit_data.function = func;
+ a->a.smack_audit_data = &a->sad;
+ a->a.smack_audit_data->function = func;
}
static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,