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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 File: linux/xattr.h
3
4 Extended attributes handling.
5
6 Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org>
7 Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved.
8 Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
9*/
10#ifndef _LINUX_XATTR_H
11#define _LINUX_XATTR_H
12
13#define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
14#define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
15
Adrian Bunk5b0a2072007-02-10 01:46:24 -080016#ifdef __KERNEL__
17
18#include <linux/types.h>
19
akpm@osdl.orge0ad7b02006-01-09 20:51:56 -080020/* Namespaces */
21#define XATTR_OS2_PREFIX "os2."
22#define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1)
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#define XATTR_SECURITY_PREFIX "security."
akpm@osdl.orge0ad7b02006-01-09 20:51:56 -080025#define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1)
26
27#define XATTR_SYSTEM_PREFIX "system."
28#define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1)
29
30#define XATTR_TRUSTED_PREFIX "trusted."
31#define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1)
32
33#define XATTR_USER_PREFIX "user."
34#define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1)
35
Adrian Bunk5b0a2072007-02-10 01:46:24 -080036struct inode;
37struct dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39struct xattr_handler {
Stephen Hemmingerbb435452010-05-13 17:53:14 -070040 const char *prefix;
Christoph Hellwig431547b2009-11-13 09:52:56 +000041 int flags; /* fs private flags passed back to the handlers */
42 size_t (*list)(struct dentry *dentry, char *list, size_t list_size,
43 const char *name, size_t name_len, int handler_flags);
44 int (*get)(struct dentry *dentry, const char *name, void *buffer,
45 size_t size, int handler_flags);
46 int (*set)(struct dentry *dentry, const char *name, const void *buffer,
47 size_t size, int flags, int handler_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048};
49
David P. Quigley42492592008-02-04 22:29:39 -080050ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
David Howells8f0cfa52008-04-29 00:59:41 -070051ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
Bill Nottingham659564c2006-10-09 16:10:48 -040052ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
David P. Quigleyb1ab7e42009-09-03 14:25:56 -040053int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
David Howells8f0cfa52008-04-29 00:59:41 -070054int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
55int vfs_removexattr(struct dentry *, const char *);
Christoph Hellwig5be196e2006-01-09 20:51:55 -080056
Linus Torvalds1da177e2005-04-16 15:20:36 -070057ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
58ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
59int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
60int generic_removexattr(struct dentry *dentry, const char *name);
61
Adrian Bunk5b0a2072007-02-10 01:46:24 -080062#endif /* __KERNEL__ */
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#endif /* _LINUX_XATTR_H */