4 Extended attributes handling.
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>
10 #ifndef _LINUX_XATTR_H
11 #define _LINUX_XATTR_H
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 */
17 #define XATTR_OS2_PREFIX "os2."
18 #define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1)
20 #define XATTR_SECURITY_PREFIX "security."
21 #define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1)
23 #define XATTR_SYSTEM_PREFIX "system."
24 #define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1)
26 #define XATTR_TRUSTED_PREFIX "trusted."
27 #define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1)
29 #define XATTR_USER_PREFIX "user."
30 #define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1)
32 /* Security namespace */
33 #define XATTR_EVM_SUFFIX "evm"
34 #define XATTR_NAME_EVM XATTR_SECURITY_PREFIX XATTR_EVM_SUFFIX
36 #define XATTR_IMA_SUFFIX "ima"
37 #define XATTR_NAME_IMA XATTR_SECURITY_PREFIX XATTR_IMA_SUFFIX
39 #define XATTR_SELINUX_SUFFIX "selinux"
40 #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
42 #define XATTR_SMACK_SUFFIX "SMACK64"
43 #define XATTR_SMACK_IPIN "SMACK64IPIN"
44 #define XATTR_SMACK_IPOUT "SMACK64IPOUT"
45 #define XATTR_SMACK_EXEC "SMACK64EXEC"
46 #define XATTR_SMACK_TRANSMUTE "SMACK64TRANSMUTE"
47 #define XATTR_SMACK_MMAP "SMACK64MMAP"
48 #define XATTR_NAME_SMACK XATTR_SECURITY_PREFIX XATTR_SMACK_SUFFIX
49 #define XATTR_NAME_SMACKIPIN XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN
50 #define XATTR_NAME_SMACKIPOUT XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT
51 #define XATTR_NAME_SMACKEXEC XATTR_SECURITY_PREFIX XATTR_SMACK_EXEC
52 #define XATTR_NAME_SMACKTRANSMUTE XATTR_SECURITY_PREFIX XATTR_SMACK_TRANSMUTE
53 #define XATTR_NAME_SMACKMMAP XATTR_SECURITY_PREFIX XATTR_SMACK_MMAP
55 #define XATTR_CAPS_SUFFIX "capability"
56 #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX
58 #define XATTR_POSIX_ACL_ACCESS "posix_acl_access"
59 #define XATTR_NAME_POSIX_ACL_ACCESS XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_ACCESS
60 #define XATTR_POSIX_ACL_DEFAULT "posix_acl_default"
61 #define XATTR_NAME_POSIX_ACL_DEFAULT XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_DEFAULT
65 #include <linux/slab.h>
66 #include <linux/types.h>
67 #include <linux/spinlock.h>
72 struct xattr_handler
{
74 int flags
; /* fs private flags passed back to the handlers */
75 size_t (*list
)(struct dentry
*dentry
, char *list
, size_t list_size
,
76 const char *name
, size_t name_len
, int handler_flags
);
77 int (*get
)(struct dentry
*dentry
, const char *name
, void *buffer
,
78 size_t size
, int handler_flags
);
79 int (*set
)(struct dentry
*dentry
, const char *name
, const void *buffer
,
80 size_t size
, int flags
, int handler_flags
);
89 ssize_t
xattr_getsecurity(struct inode
*, const char *, void *, size_t);
90 ssize_t
vfs_getxattr(struct dentry
*, const char *, void *, size_t);
91 ssize_t
vfs_listxattr(struct dentry
*d
, char *list
, size_t size
);
92 int __vfs_setxattr_noperm(struct dentry
*, const char *, const void *, size_t, int);
93 int vfs_setxattr(struct dentry
*, const char *, const void *, size_t, int);
94 int vfs_removexattr(struct dentry
*, const char *);
96 ssize_t
generic_getxattr(struct dentry
*dentry
, const char *name
, void *buffer
, size_t size
);
97 ssize_t
generic_listxattr(struct dentry
*dentry
, char *buffer
, size_t buffer_size
);
98 int generic_setxattr(struct dentry
*dentry
, const char *name
, const void *value
, size_t size
, int flags
);
99 int generic_removexattr(struct dentry
*dentry
, const char *name
);
100 ssize_t
vfs_getxattr_alloc(struct dentry
*dentry
, const char *name
,
101 char **xattr_value
, size_t size
, gfp_t flags
);
102 int vfs_xattr_cmp(struct dentry
*dentry
, const char *xattr_name
,
103 const char *value
, size_t size
, gfp_t flags
);
105 struct simple_xattrs
{
106 struct list_head head
;
110 struct simple_xattr
{
111 struct list_head list
;
118 * initialize the simple_xattrs structure
120 static inline void simple_xattrs_init(struct simple_xattrs
*xattrs
)
122 INIT_LIST_HEAD(&xattrs
->head
);
123 spin_lock_init(&xattrs
->lock
);
127 * free all the xattrs
129 static inline void simple_xattrs_free(struct simple_xattrs
*xattrs
)
131 struct simple_xattr
*xattr
, *node
;
133 list_for_each_entry_safe(xattr
, node
, &xattrs
->head
, list
) {
139 struct simple_xattr
*simple_xattr_alloc(const void *value
, size_t size
);
140 int simple_xattr_get(struct simple_xattrs
*xattrs
, const char *name
,
141 void *buffer
, size_t size
);
142 int simple_xattr_set(struct simple_xattrs
*xattrs
, const char *name
,
143 const void *value
, size_t size
, int flags
);
144 int simple_xattr_remove(struct simple_xattrs
*xattrs
, const char *name
);
145 ssize_t
simple_xattr_list(struct simple_xattrs
*xattrs
, char *buffer
,
147 void simple_xattr_list_add(struct simple_xattrs
*xattrs
,
148 struct simple_xattr
*new_xattr
);
150 #endif /* __KERNEL__ */
152 #endif /* _LINUX_XATTR_H */
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