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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_NAMEI_H |
| 2 | #define _LINUX_NAMEI_H |
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| 3 | |||
| 4 | #include <linux/linkage.h> |
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| 5 | |||
| 6 | struct vfsmount; |
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| 7 | |||
| 8 | struct open_intent { |
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| 9 | int flags; |
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| 10 | int create_mode; |
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| 11 | }; |
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| 12 | |||
| 13 | struct nameidata { |
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| 14 | struct dentry *dentry; |
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| 15 | struct vfsmount *mnt; |
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| 16 | struct qstr last; |
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| 17 | unsigned int flags; |
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| 18 | int last_type; |
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| 19 | |||
| 20 | /* Intent data */ |
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| 21 | union { |
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| 22 | struct open_intent open; |
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| 23 | } intent; |
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| 24 | }; |
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| 25 | |||
| 26 | /* |
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| 27 | * Type of the last component on LOOKUP_PARENT |
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| 28 | */ |
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| 29 | enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND}; |
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| 30 | |||
| 31 | /* |
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| 32 | * The bitmask for a lookup event: |
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| 33 | * - follow links at the end |
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| 34 | * - require a directory |
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| 35 | * - ending slashes ok even for nonexistent files |
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| 36 | * - internal "there are more path compnents" flag |
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| 37 | * - locked when lookup done with dcache_lock held |
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| 38 | */ |
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| 39 | #define LOOKUP_FOLLOW 1 |
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| 40 | #define LOOKUP_DIRECTORY 2 |
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| 41 | #define LOOKUP_CONTINUE 4 |
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| 42 | #define LOOKUP_PARENT 16 |
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| 43 | #define LOOKUP_NOALT 32 |
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| 44 | /* |
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| 45 | * Intent data |
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| 46 | */ |
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| 47 | #define LOOKUP_OPEN (0x0100) |
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| 48 | #define LOOKUP_CREATE (0x0200) |
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| 49 | #define LOOKUP_ACCESS (0x0400) |
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| 50 | |||
| 51 | extern int FASTCALL(__user_walk(const char __user *, unsigned, struct nameidata *)); |
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| 52 | #define user_path_walk(name,nd) \ |
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| 53 | __user_walk(name, LOOKUP_FOLLOW, nd) |
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| 54 | #define user_path_walk_link(name,nd) \ |
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| 55 | __user_walk(name, 0, nd) |
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| 56 | extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *)); |
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| 57 | extern int FASTCALL(path_walk(const char *, struct nameidata *)); |
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| 58 | extern int FASTCALL(link_path_walk(const char *, struct nameidata *)); |
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| 59 | extern void path_release(struct nameidata *); |
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| 60 | |||
| 61 | extern struct dentry * lookup_one_len(const char *, struct dentry *, int); |
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| 62 | extern struct dentry * lookup_hash(struct qstr *, struct dentry *); |
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| 63 | |||
| 64 | extern int follow_down(struct vfsmount **, struct dentry **); |
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| 65 | extern int follow_up(struct vfsmount **, struct dentry **); |
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| 66 | |||
| 67 | extern struct dentry *lock_rename(struct dentry *, struct dentry *); |
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| 68 | extern void unlock_rename(struct dentry *, struct dentry *); |
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| 69 | |||
| 70 | #endif /* _LINUX_NAMEI_H */ |