Linux kernel mirror (for testing)
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linux
1/*
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
16/* Namespaces */
17#define XATTR_OS2_PREFIX "os2."
18#define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1)
19
20#define XATTR_SECURITY_PREFIX "security."
21#define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1)
22
23#define XATTR_SYSTEM_PREFIX "system."
24#define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1)
25
26#define XATTR_TRUSTED_PREFIX "trusted."
27#define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1)
28
29#define XATTR_USER_PREFIX "user."
30#define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1)
31
32/* Security namespace */
33#define XATTR_EVM_SUFFIX "evm"
34#define XATTR_NAME_EVM XATTR_SECURITY_PREFIX XATTR_EVM_SUFFIX
35
36#define XATTR_SELINUX_SUFFIX "selinux"
37#define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
38
39#define XATTR_SMACK_SUFFIX "SMACK64"
40#define XATTR_SMACK_IPIN "SMACK64IPIN"
41#define XATTR_SMACK_IPOUT "SMACK64IPOUT"
42#define XATTR_SMACK_EXEC "SMACK64EXEC"
43#define XATTR_SMACK_TRANSMUTE "SMACK64TRANSMUTE"
44#define XATTR_SMACK_MMAP "SMACK64MMAP"
45#define XATTR_NAME_SMACK XATTR_SECURITY_PREFIX XATTR_SMACK_SUFFIX
46#define XATTR_NAME_SMACKIPIN XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN
47#define XATTR_NAME_SMACKIPOUT XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT
48#define XATTR_NAME_SMACKEXEC XATTR_SECURITY_PREFIX XATTR_SMACK_EXEC
49#define XATTR_NAME_SMACKTRANSMUTE XATTR_SECURITY_PREFIX XATTR_SMACK_TRANSMUTE
50#define XATTR_NAME_SMACKMMAP XATTR_SECURITY_PREFIX XATTR_SMACK_MMAP
51
52#define XATTR_CAPS_SUFFIX "capability"
53#define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX
54
55#define XATTR_POSIX_ACL_ACCESS "posix_acl_access"
56#define XATTR_NAME_POSIX_ACL_ACCESS XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_ACCESS
57#define XATTR_POSIX_ACL_DEFAULT "posix_acl_default"
58#define XATTR_NAME_POSIX_ACL_DEFAULT XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_DEFAULT
59
60#ifdef __KERNEL__
61
62#include <linux/types.h>
63
64struct inode;
65struct dentry;
66
67struct xattr_handler {
68 const char *prefix;
69 int flags; /* fs private flags passed back to the handlers */
70 size_t (*list)(struct dentry *dentry, char *list, size_t list_size,
71 const char *name, size_t name_len, int handler_flags);
72 int (*get)(struct dentry *dentry, const char *name, void *buffer,
73 size_t size, int handler_flags);
74 int (*set)(struct dentry *dentry, const char *name, const void *buffer,
75 size_t size, int flags, int handler_flags);
76};
77
78struct xattr {
79 char *name;
80 void *value;
81 size_t value_len;
82};
83
84ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
85ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
86ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
87int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
88int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
89int vfs_removexattr(struct dentry *, const char *);
90
91ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
92ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
93int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
94int generic_removexattr(struct dentry *dentry, const char *name);
95ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name,
96 char **xattr_value, size_t size, gfp_t flags);
97int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
98 const char *value, size_t size, gfp_t flags);
99#endif /* __KERNEL__ */
100
101#endif /* _LINUX_XATTR_H */