4 #include <linux/linkage.h>
13 enum { MAX_NESTED_LINKS = 8 };
16 struct dentry *dentry;
22 char *saved_names[MAX_NESTED_LINKS + 1];
26 struct open_intent open;
31 * Type of the last component on LOOKUP_PARENT
33 enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
36 * The bitmask for a lookup event:
37 * - follow links at the end
38 * - require a directory
39 * - ending slashes ok even for nonexistent files
40 * - internal "there are more path compnents" flag
41 * - locked when lookup done with dcache_lock held
42 * - dentry cache is untrusted; force a real lookup
44 #define LOOKUP_FOLLOW 1
45 #define LOOKUP_DIRECTORY 2
46 #define LOOKUP_CONTINUE 4
47 #define LOOKUP_PARENT 16
48 #define LOOKUP_NOALT 32
49 #define LOOKUP_REVAL 64
50 #define LOOKUP_ATOMIC 128
55 #define LOOKUP_OPEN (0x0100)
56 #define LOOKUP_CREATE (0x0200)
57 #define LOOKUP_ACCESS (0x0400)
59 extern int FASTCALL(__user_walk(const char __user *, unsigned, struct nameidata *));
60 #define user_path_walk(name,nd) \
61 __user_walk(name, LOOKUP_FOLLOW, nd)
62 #define user_path_walk_link(name,nd) \
63 __user_walk(name, 0, nd)
64 extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *));
65 extern int FASTCALL(path_walk(const char *, struct nameidata *));
66 extern int FASTCALL(link_path_walk(const char *, struct nameidata *));
67 extern void path_release(struct nameidata *);
68 extern void path_release_on_umount(struct nameidata *);
70 extern struct dentry * lookup_one_len(const char *, struct dentry *, int);
71 extern struct dentry * lookup_hash(struct qstr *, struct dentry *);
73 extern int follow_down(struct vfsmount **, struct dentry **);
74 extern int follow_up(struct vfsmount **, struct dentry **);
76 extern struct dentry *lock_rename(struct dentry *, struct dentry *);
77 extern void unlock_rename(struct dentry *, struct dentry *);
79 static inline void nd_set_link(struct nameidata *nd, char *path)
81 nd->saved_names[nd->depth] = path;
84 static inline char *nd_get_link(struct nameidata *nd)
86 return nd->saved_names[nd->depth];
89 #endif /* _LINUX_NAMEI_H */