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authorYuichi Nakamura <ynakam@hitachisoft.jp>2007-09-14 04:27:07 +0400
committerJames Morris <jmorris@namei.org>2007-10-17 02:59:31 +0400
commit788e7dd4c22e6f41b3a118fd8c291f831f6fddbb (patch)
treecbe2d2a360aaf7dc243bef432e1c50507ae6db7b /security/selinux/avc.c
parent3232c110b56bd01c5f0fdfd16b4d695f2e05b0a9 (diff)
downloadlinux-788e7dd4c22e6f41b3a118fd8c291f831f6fddbb.tar.xz
SELinux: Improve read/write performance
It reduces the selinux overhead on read/write by only revalidating permissions in selinux_file_permission if the task or inode labels have changed or the policy has changed since the open-time check. A new LSM hook, security_dentry_open, is added to capture the necessary state at open time to allow this optimization. (see http://marc.info/?l=selinux&m=118972995207740&w=2) Signed-off-by: Yuichi Nakamura<ynakam@hitachisoft.jp> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux/avc.c')
-rw-r--r--security/selinux/avc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 0e69adf63bdb..81b3dff3cbf0 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -916,3 +916,8 @@ int avc_has_perm(u32 ssid, u32 tsid, u16 tclass,
avc_audit(ssid, tsid, tclass, requested, &avd, rc, auditdata);
return rc;
}
+
+u32 avc_policy_seqno(void)
+{
+ return avc_cache.latest_notif;
+}