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
56 #define LOOKUP_EXCL 0x0400
57 #define LOOKUP_RENAME_TARGET 0x0800
59 extern int user_path_at(int, const char __user
*, unsigned, struct path
*);
61 #define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)
62 #define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
63 #define user_path_dir(name, path) \
64 user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path)
66 extern int kern_path(const char *, unsigned, struct path
*);
68 extern int path_lookup(const char *, unsigned, struct nameidata
*);
69 extern int vfs_path_lookup(struct dentry
*, struct vfsmount
*,
70 const char *, unsigned int, struct nameidata
*);
72 extern int path_lookup_open(int dfd
, const char *name
, unsigned lookup_flags
, struct nameidata
*, int open_flags
);
73 extern struct file
*lookup_instantiate_filp(struct nameidata
*nd
, struct dentry
*dentry
,
74 int (*open
)(struct inode
*, struct file
*));
75 extern struct file
*nameidata_to_filp(struct nameidata
*nd
, int flags
);
76 extern void release_open_intent(struct nameidata
*);
78 extern struct dentry
*lookup_one_len(const char *, struct dentry
*, int);
79 extern struct dentry
*lookup_one_noperm(const char *, struct dentry
*);
81 extern int follow_down(struct vfsmount
**, struct dentry
**);
82 extern int follow_up(struct vfsmount
**, struct dentry
**);
84 extern struct dentry
*lock_rename(struct dentry
*, struct dentry
*);
85 extern void unlock_rename(struct dentry
*, struct dentry
*);
87 static inline void nd_set_link(struct nameidata
*nd
, char *path
)
89 nd
->saved_names
[nd
->depth
] = path
;
92 static inline char *nd_get_link(struct nameidata
*nd
)
94 return nd
->saved_names
[nd
->depth
];
97 static inline void nd_terminate_link(void *name
, size_t len
, size_t maxlen
)
99 ((char *) name
)[min(len
, maxlen
)] = '\0';
102 #endif /* _LINUX_NAMEI_H */
This page took 0.032761 seconds and 5 git commands to generate.