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authorYuichi Nakamura <ynakam@hitachisoft.jp>2007-09-14 09:27:07 +0900
committerJames Morris <jmorris@namei.org>2007-10-17 08:59:31 +1000
commit788e7dd4c22e6f41b3a118fd8c291f831f6fddbb (patch)
treecbe2d2a360aaf7dc243bef432e1c50507ae6db7b /security/selinux/include/objsec.h
parent3232c110b56bd01c5f0fdfd16b4d695f2e05b0a9 (diff)
downloadlinux-788e7dd4c22e6f41b3a118fd8c291f831f6fddbb.tar.gz
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/include/objsec.h')
-rw-r--r--security/selinux/include/objsec.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index 91b88f0ba20c..642a9fd319ad 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -53,6 +53,8 @@ struct file_security_struct {
struct file *file; /* back pointer to file object */
u32 sid; /* SID of open file description */
u32 fown_sid; /* SID of file owner (for SIGIO) */
+ u32 isid; /* SID of inode at the time of file open */
+ u32 pseqno; /* Policy seqno at the time of file open */
};
struct superblock_security_struct {