[RFC][PATCH] audit: get inode pathname patch

[Mimi Zohar <zohar@linux.vnet.ibm.com>]

We are interested in using auditing's context pathname information.  
Is this the best way of accessing it?

Add support for accessing auditing's inode full pathname.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>

Index: security-testing-2.6/include/linux/audit.h
===================================================================
--- security-testing-2.6.orig/include/linux/audit.h
+++ security-testing-2.6/include/linux/audit.h
@@ -403,6 +403,8 @@ extern void audit_syscall_entry(int arch
 				unsigned long a2, unsigned long a3);
 extern void audit_syscall_exit(int failed, long return_code);
 extern void __audit_getname(const char *name);
+extern const char *audit_get_inode_pathname(struct task_struct *tsk,
+					    struct inode *inode);
 extern void audit_putname(const char *name);
 extern void __audit_inode(const char *name, const struct dentry *dentry);
 extern void __audit_inode_child(const char *dname, const struct dentry *dentry,
Index: security-testing-2.6/kernel/auditsc.c
===================================================================
--- security-testing-2.6.orig/kernel/auditsc.c
+++ security-testing-2.6/kernel/auditsc.c
@@ -1677,6 +1677,28 @@ retry:
 #endif
 }
 
+const char *audit_get_inode_pathname(struct task_struct *tsk,
+				     struct inode *inode)
+{
+	struct audit_context *context;
+	int idx;
+
+	context = tsk->audit_context;
+	if (!context)
+		return NULL;
+	for (idx = 0; idx < context->name_count; idx++) {
+		struct audit_names *n = &context->names[idx];
+
+		if (!n->name)
+			continue;
+
+		if (n->ino == inode->i_ino)
+			return n->name;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(audit_get_inode_pathname);
+
 /**
  * audit_getname - add a name to the list
  * @name: name to add