audit: make audit_inode take struct filename
Keep a pointer to the audit_names "slot" in struct filename.
Have all of the audit_inode callers pass a struct filename ponter to
audit_inode instead of a string pointer. If the aname field is already
populated, then we can skip walking the list altogether and just use it
directly.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 521163a..2f186ed 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2076,6 +2076,7 @@
n->name = name;
n->name_len = AUDIT_NAME_FULL;
n->name_put = true;
+ name->aname = n;
if (!context->pwd.dentry)
get_fs_pwd(current->fs, &context->pwd);
@@ -2166,7 +2167,7 @@
* @dentry: dentry being audited
* @parent: does this dentry represent the parent?
*/
-void __audit_inode(const char *name, const struct dentry *dentry,
+void __audit_inode(struct filename *name, const struct dentry *dentry,
unsigned int parent)
{
struct audit_context *context = current->audit_context;
@@ -2179,9 +2180,29 @@
if (!name)
goto out_alloc;
+#if AUDIT_DEBUG
+ /* The struct filename _must_ have a populated ->name */
+ BUG_ON(!name->name);
+#endif
+ /*
+ * If we have a pointer to an audit_names entry already, then we can
+ * just use it directly if the type is correct.
+ */
+ n = name->aname;
+ if (n) {
+ if (parent) {
+ if (n->type == AUDIT_TYPE_PARENT ||
+ n->type == AUDIT_TYPE_UNKNOWN)
+ goto out;
+ } else {
+ if (n->type != AUDIT_TYPE_PARENT)
+ goto out;
+ }
+ }
+
list_for_each_entry_reverse(n, &context->names_list, list) {
/* does the name pointer match? */
- if (!n->name || n->name->name != name)
+ if (!n->name || n->name->name != name->name)
continue;
/* match the correct record type */
