4 #include <linux/dcache.h>
5 #include <linux/linkage.h>
6 #include <linux/path.h>
16 enum { MAX_NESTED_LINKS
= 8 };
24 char *saved_names
[MAX_NESTED_LINKS
+ 1];
28 struct open_intent open
;
33 * Type of the last component on LOOKUP_PARENT
35 enum {LAST_NORM
, LAST_ROOT
, LAST_DOT
, LAST_DOTDOT
, LAST_BIND
};
38 * The bitmask for a lookup event:
39 * - follow links at the end
40 * - require a directory
41 * - ending slashes ok even for nonexistent files
42 * - internal "there are more path compnents" flag
43 * - locked when lookup done with dcache_lock held
44 * - dentry cache is untrusted; force a real lookup
46 #define LOOKUP_FOLLOW 1
47 #define LOOKUP_DIRECTORY 2
48 #define LOOKUP_CONTINUE 4
49 #define LOOKUP_PARENT 16
50 #define LOOKUP_REVAL 64
54 #define LOOKUP_OPEN (0x0100)
55 #define LOOKUP_CREATE (0x0200)
57 extern int user_path_at(int, const char __user
*, unsigned, struct path
*);
59 #define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)
60 #define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
61 #define user_path_dir(name, path) \
62 user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path)
64 extern int path_lookup(const char *, unsigned, struct nameidata
*);
65 extern int vfs_path_lookup(struct dentry
*, struct vfsmount
*,
66 const char *, unsigned int, struct nameidata
*);
68 extern int path_lookup_open(int dfd
, const char *name
, unsigned lookup_flags
, struct nameidata
*, int open_flags
);
69 extern struct file
*lookup_instantiate_filp(struct nameidata
*nd
, struct dentry
*dentry
,
70 int (*open
)(struct inode
*, struct file
*));
71 extern struct file
*nameidata_to_filp(struct nameidata
*nd
, int flags
);
72 extern void release_open_intent(struct nameidata
*);
74 extern struct dentry
*lookup_one_len(const char *, struct dentry
*, int);
75 extern struct dentry
*lookup_one_noperm(const char *, struct dentry
*);
77 extern int follow_down(struct vfsmount
**, struct dentry
**);
78 extern int follow_up(struct vfsmount
**, struct dentry
**);
80 extern struct dentry
*lock_rename(struct dentry
*, struct dentry
*);
81 extern void unlock_rename(struct dentry
*, struct dentry
*);
83 static inline void nd_set_link(struct nameidata
*nd
, char *path
)
85 nd
->saved_names
[nd
->depth
] = path
;
88 static inline char *nd_get_link(struct nameidata
*nd
)
90 return nd
->saved_names
[nd
->depth
];
93 #endif /* _LINUX_NAMEI_H */