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authorEric Paris <eparis@redhat.com>2009-02-12 14:50:54 -0500
committerJames Morris <jmorris@namei.org>2009-02-14 09:23:08 +1100
commitf1c6381a6e337adcecf84be2a838bd9e610e2365 (patch)
treea6e0857db27a38b0976fb422836f9443241b4b61 /security
parent21193dcd1f3570ddfd8a04f4465e484c1f94252f (diff)
downloadlinux-f1c6381a6e337adcecf84be2a838bd9e610e2365.tar.gz
SELinux: remove unused av.decided field
It appears there was an intention to have the security server only decide certain permissions and leave other for later as some sort of a portential performance win. We are currently always deciding all 32 bits of permissions and this is a useless couple of branches and wasted space. This patch completely drops the av.decided concept. This in a 17% reduction in the time spent in avc_has_perm_noaudit based on oprofile sampling of a tbench benchmark. Signed-off-by: Eric Paris <eparis@redhat.com> Reviewed-by: Paul Moore <paul.moore@hp.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/avc.c15
-rw-r--r--security/selinux/include/security.h1
-rw-r--r--security/selinux/selinuxfs.c2
-rw-r--r--security/selinux/ss/services.c2
4 files changed, 6 insertions, 14 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 2a84dec4adf..326aa78bd42 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -381,30 +381,25 @@ static inline struct avc_node *avc_search_node(u32 ssid, u32 tsid, u16 tclass)
* @ssid: source security identifier
* @tsid: target security identifier
* @tclass: target security class
- * @requested: requested permissions, interpreted based on @tclass
*
* Look up an AVC entry that is valid for the
- * @requested permissions between the SID pair
* (@ssid, @tsid), interpreting the permissions
* based on @tclass. If a valid AVC entry exists,
* then this function return the avc_node.
* Otherwise, this function returns NULL.
*/
-static struct avc_node *avc_lookup(u32 ssid, u32 tsid, u16 tclass, u32 requested)
+static struct avc_node *avc_lookup(u32 ssid, u32 tsid, u16 tclass)
{
struct avc_node *node;
avc_cache_stats_incr(lookups);
node = avc_search_node(ssid, tsid, tclass);
- if (node && ((node->ae.avd.decided & requested) == requested)) {
+ if (node)
avc_cache_stats_incr(hits);
- goto out;
- }
+ else
+ avc_cache_stats_incr(misses);
- node = NULL;
- avc_cache_stats_incr(misses);
-out:
return node;
}
@@ -875,7 +870,7 @@ int avc_has_perm_noaudit(u32 ssid, u32 tsid,
rcu_read_lock();
- node = avc_lookup(ssid, tsid, tclass, requested);
+ node = avc_lookup(ssid, tsid, tclass);
if (!node) {
rcu_read_unlock();
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index e1d9db77998..5c3434f7626 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -88,7 +88,6 @@ int security_policycap_supported(unsigned int req_cap);
#define SEL_VEC_MAX 32
struct av_decision {
u32 allowed;
- u32 decided;
u32 auditallow;
u32 auditdeny;
u32 seqno;
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 01ec6d2c6b9..d3c8b982cfb 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -595,7 +595,7 @@ static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT,
"%x %x %x %x %u",
- avd.allowed, avd.decided,
+ avd.allowed, 0xffffffff,
avd.auditallow, avd.auditdeny,
avd.seqno);
out2:
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index c65e4fe4a0f..deeec6c013a 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -407,7 +407,6 @@ static int context_struct_compute_av(struct context *scontext,
* Initialize the access vectors to the default values.
*/
avd->allowed = 0;
- avd->decided = 0xffffffff;
avd->auditallow = 0;
avd->auditdeny = 0xffffffff;
avd->seqno = latest_granting;
@@ -743,7 +742,6 @@ int security_compute_av(u32 ssid,
if (!ss_initialized) {
avd->allowed = 0xffffffff;
- avd->decided = 0xffffffff;
avd->auditallow = 0;
avd->auditdeny = 0xffffffff;
avd->seqno = latest_granting;