Release 4.12 include/linux/namei.h

#ifndef _LINUX_NAMEI_H

#define _LINUX_NAMEI_H

#include <linux/kernel.h>
#include <linux/path.h>
#include <linux/fcntl.h>
#include <linux/errno.h>


enum { MAX_NESTED_LINKS = 8 };


#define MAXSYMLINKS 40

/*
 * 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

#define LOOKUP_NO_REVAL		0x0080

/*
 * 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

#define LOOKUP_DOWN		0x8000

extern int path_pts(struct path *path);

extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);



static inline int user_path_at(int dfd, const char __user *name, unsigned flags,
		 struct path *path)
{
	return user_path_at_empty(dfd, name, flags, path, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
23
60.53%
1
50.00%
Andy Whitcroft
15
39.47%
1
50.00%
Total
38
100.00%
2
100.00%



static inline int user_path(const char __user *name, struct path *path)
{
	return user_path_at_empty(AT_FDCWD, name, LOOKUP_FOLLOW, path, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
29
90.62%
2
66.67%
Harvey Harrison
3
9.38%
1
33.33%
Total
32
100.00%
3
100.00%



static inline int user_lpath(const char __user *name, struct path *path)
{
	return user_path_at_empty(AT_FDCWD, name, 0, path, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
28
87.50%
2
66.67%
Christoph Hellwig
4
12.50%
1
33.33%
Total
32
100.00%
3
100.00%



static inline int user_path_dir(const char __user *name, struct path *path)
{
	return user_path_at_empty(AT_FDCWD, name,
				  LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
30
88.24%
2
66.67%
Christoph Hellwig
4
11.76%
1
33.33%
Total
34
100.00%
3
100.00%

extern int kern_path(const char *, unsigned, struct path *);

extern struct dentry *kern_path_create(int, const char *, struct path *, unsigned int);
extern struct dentry *user_path_create(int, const char __user *, struct path *, unsigned int);
extern void done_path_create(struct path *, struct dentry *);
extern struct dentry *kern_path_locked(const char *, struct path *);
extern int kern_path_mountpoint(int, const char *, struct path *, unsigned int);

extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
extern struct dentry *lookup_one_len_unlocked(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 *);

extern void nd_jump_link(struct path *path);



static inline void nd_terminate_link(void *name, size_t len, size_t maxlen)
{
	((char *) name)[min(len, maxlen)] = '\0';
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Duane Griffin
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%

/**
 * retry_estale - determine whether the caller should retry an operation
 * @error: the error that would currently be returned
 * @flags: flags being used for next lookup attempt
 *
 * Check to see if the error code was -ESTALE, and then determine whether
 * to retry the call based on whether "flags" already has LOOKUP_REVAL set.
 *
 * Returns true if the caller should try the operation again.
 */

static inline bool

retry_estale(const long error, const unsigned int flags)
{
	return error == -ESTALE && !(flags & LOOKUP_REVAL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Layton
29
100.00%
1
100.00%
Total
29
100.00%
1
100.00%

#endif /* _LINUX_NAMEI_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
250
46.13%
18
45.00%
Christoph Hellwig
115
21.22%
2
5.00%
Duane Griffin
35
6.46%
1
2.50%
Jeff Layton
32
5.90%
2
5.00%
Harvey Harrison
22
4.06%
1
2.50%
Neil Brown
17
3.14%
1
2.50%
Andy Whitcroft
15
2.77%
1
2.50%
Trond Myklebust
11
2.03%
3
7.50%
David Howells
10
1.85%
2
5.00%
Eric W. Biedermann
10
1.85%
1
2.50%
Nicholas Piggin
8
1.48%
1
2.50%
Linus Torvalds
4
0.74%
1
2.50%
Hirofumi Ogawa
4
0.74%
1
2.50%
David S. Miller
2
0.37%
1
2.50%
Jan Blunck
2
0.37%
1
2.50%
Stephen Warren
2
0.37%
1
2.50%
Alexey Dobriyan
2
0.37%
1
2.50%
Josef 'Jeff' Sipek
1
0.18%
1
2.50%
Total
542
100.00%
40
100.00%
Directory: include/linux

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.