1 files changed, 112 insertions, 0 deletions
diff --git a/include/linux/namei.h b/include/linux/namei.h
new file mode 100644
index 00000000..ffc02135
--- /dev/null
+++ b/include/linux/namei.h
@@ -0,0 +1,112 @@
+#ifndef _LINUX_NAMEI_H
+#define _LINUX_NAMEI_H
+
+#include <linux/dcache.h>
+#include <linux/linkage.h>
+#include <linux/path.h>
+
+struct vfsmount;
+
+struct open_intent {
+	int	flags;
+	int	create_mode;
+	struct file *file;
+};
+
+enum { MAX_NESTED_LINKS = 8 };
+
+struct nameidata {
+	struct path	path;
+	struct qstr	last;
+	struct path	root;
+	struct inode	*inode; /* path.dentry.d_inode */
+	unsigned int	flags;
+	unsigned	seq;
+	int		last_type;
+	unsigned	depth;
+	char *saved_names[MAX_NESTED_LINKS + 1];
+
+	/* Intent data */
+	union {
+		struct open_intent open;
+	} intent;
+};
+
+/*
+ * Type of the last component on LOOKUP_PARENT
+ */
+enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
+
+/*
+ * The bitmask for a lookup event:
+ *  - follow links at the end
+ *  - require a directory
+ *  - ending slashes ok even for nonexistent files
+ *  - internal "there are more path components" flag
+ *  - dentry cache is untrusted; force a real lookup
+ *  - suppress terminal automount
+ */
+#define LOOKUP_FOLLOW		0x0001
+#define LOOKUP_DIRECTORY	0x0002
+#define LOOKUP_AUTOMOUNT	0x0004
+
+#define LOOKUP_PARENT		0x0010
+#define LOOKUP_REVAL		0x0020
+#define LOOKUP_RCU		0x0040
+
+/*
+ * Intent data
+ */
+#define LOOKUP_OPEN		0x0100
+#define LOOKUP_CREATE		0x0200
+#define LOOKUP_EXCL		0x0400
+#define LOOKUP_RENAME_TARGET	0x0800
+
+#define LOOKUP_JUMPED		0x1000
+#define LOOKUP_ROOT		0x2000
+#define LOOKUP_EMPTY		0x4000
+
+extern int user_path_at(int, const char __user *, unsigned, struct path *);
+extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);
+
+#define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)
+#define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
+#define user_path_dir(name, path) \
+	user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path)
+
+extern int kern_path(const char *, unsigned, struct path *);
+
+extern struct dentry *kern_path_create(int, const char *, struct path *, int);
+extern struct dentry *user_path_create(int, const char __user *, struct path *, int);
+extern int kern_path_parent(const char *, struct nameidata *);
+extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
+			   const char *, unsigned int, struct path *);
+
+extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
+		int (*open)(struct inode *, struct file *));
+
+extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
+
+extern int follow_down_one(struct path *);
+extern int follow_down(struct path *);
+extern int follow_up(struct path *);
+
+extern struct dentry *lock_rename(struct dentry *, struct dentry *);
+extern void unlock_rename(struct dentry *, struct dentry *);
+
+static inline void nd_set_link(struct nameidata *nd, char *path)
+{
+	nd->saved_names[nd->depth] = path;
+}
+
+static inline char *nd_get_link(struct nameidata *nd)
+{
+	return nd->saved_names[nd->depth];
+}
+
+static inline void nd_terminate_link(void *name, size_t len, size_t maxlen)
+{
+	((char *) name)[min(len, maxlen)] = '\0';
+}
+
+#endif /* _LINUX_NAMEI_H */