[TOMOYO #7 04/30] Prototypes of realpath.

[Tetsuo Handa]

This file defines realpath related prototypes.

Signed-off-by: Kentaro Takeda <takedakn@xxxxxxxxxxxxx>
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Toshiharu Harada <haradats@xxxxxxxxxxxxx>
---
 include/linux/realpath.h |   62 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

--- /dev/null
+++ linux-2.6.25-rc8-mm1/include/linux/realpath.h
@@ -0,0 +1,62 @@
+/*
+ * include/linux/realpath.h
+ *
+ * Get the canonicalized absolute pathnames. The basis for SAKURA and TOMOYO.
+ *
+ * Copyright (C) 2005-2008  NTT DATA CORPORATION
+ *
+ * Version: 1.6.0   2008/04/01
+ *
+ */
+
+#ifndef _LINUX_REALPATH_H
+#define _LINUX_REALPATH_H
+
+struct dentry;
+struct vfsmount;
+struct condition_list;
+struct path_info;
+
+/* Returns realpath(3) of the given pathname but ignores chroot'ed root. */
+int ccs_realpath_from_dentry2(struct dentry *dentry, struct vfsmount *mnt,
+			      char *newname, int newname_len);
+
+/*
+ * Returns realpath(3) of the given pathname but ignores chroot'ed root.
+ * These functions use ccs_alloc(), so caller must ccs_free()
+ * if these functions didn't return NULL.
+ */
+char *ccs_realpath(const char *pathname);
+/* Same with ccs_realpath() except that it doesn't follow the final symlink. */
+char *ccs_realpath_nofollow(const char *pathname);
+/* Same with ccs_realpath() except that the pathname is already solved. */
+char *ccs_realpath_from_dentry(struct dentry *dentry, struct vfsmount *mnt);
+
+/*
+ * Allocate memory for ACL entry.
+ * The RAM is chunked, so NEVER try to kfree() the returned pointer.
+ */
+void *ccs_alloc_element(const unsigned int size);
+
+/* Get used RAM size for ccs_alloc_elements(). */
+unsigned int ccs_get_memory_used_for_elements(void);
+
+/*
+ * Keep the given name on the RAM.
+ * The RAM is shared, so NEVER try to modify or kfree() the returned name.
+ */
+const struct path_info *ccs_save_name(const char *name);
+
+/* Get used RAM size for ccs_save_name(). */
+unsigned int ccs_get_memory_used_for_save_name(void);
+
+/* Allocate memory for temporary use (e.g. permission checks). */
+void *ccs_alloc(const size_t size);
+
+/* Get used RAM size for ccs_alloc(). */
+unsigned int ccs_get_memory_used_for_dynamic(void);
+
+/* Free memory allocated by ccs_alloc(). */
+void ccs_free(const void *p);
+
+#endif

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