Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
e0ad7b07 | 16 | /* Namespaces */ |
17 | #define XATTR_OS2_PREFIX "os2." | |
18 | #define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1) | |
19 | ||
1da177e4 | 20 | #define XATTR_SECURITY_PREFIX "security." |
e0ad7b07 | 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 | ||
af4f1360 | 32 | /* Security namespace */ |
66dbc325 MZ |
33 | #define XATTR_EVM_SUFFIX "evm" |
34 | #define XATTR_NAME_EVM XATTR_SECURITY_PREFIX XATTR_EVM_SUFFIX | |
35 | ||
2fe5d6de MZ |
36 | #define XATTR_IMA_SUFFIX "ima" |
37 | #define XATTR_NAME_IMA XATTR_SECURITY_PREFIX XATTR_IMA_SUFFIX | |
38 | ||
af4f1360 MZ |
39 | #define XATTR_SELINUX_SUFFIX "selinux" |
40 | #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX | |
41 | ||
42 | #define XATTR_SMACK_SUFFIX "SMACK64" | |
43 | #define XATTR_SMACK_IPIN "SMACK64IPIN" | |
44 | #define XATTR_SMACK_IPOUT "SMACK64IPOUT" | |
676dac4b | 45 | #define XATTR_SMACK_EXEC "SMACK64EXEC" |
5c6d1125 | 46 | #define XATTR_SMACK_TRANSMUTE "SMACK64TRANSMUTE" |
7898e1f8 | 47 | #define XATTR_SMACK_MMAP "SMACK64MMAP" |
af4f1360 MZ |
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 | |
676dac4b | 51 | #define XATTR_NAME_SMACKEXEC XATTR_SECURITY_PREFIX XATTR_SMACK_EXEC |
5c6d1125 | 52 | #define XATTR_NAME_SMACKTRANSMUTE XATTR_SECURITY_PREFIX XATTR_SMACK_TRANSMUTE |
7898e1f8 | 53 | #define XATTR_NAME_SMACKMMAP XATTR_SECURITY_PREFIX XATTR_SMACK_MMAP |
af4f1360 MZ |
54 | |
55 | #define XATTR_CAPS_SUFFIX "capability" | |
56 | #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX | |
57 | ||
bf6d0f5d MZ |
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 | |
62 | ||
1dbe3942 EP |
63 | #ifdef __KERNEL__ |
64 | ||
38f38657 | 65 | #include <linux/slab.h> |
1dbe3942 | 66 | #include <linux/types.h> |
38f38657 | 67 | #include <linux/spinlock.h> |
1dbe3942 | 68 | |
5b0a2075 AB |
69 | struct inode; |
70 | struct dentry; | |
1da177e4 LT |
71 | |
72 | struct xattr_handler { | |
bb435453 | 73 | const char *prefix; |
431547b3 CH |
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); | |
1da177e4 LT |
81 | }; |
82 | ||
9d8f13ba MZ |
83 | struct xattr { |
84 | char *name; | |
85 | void *value; | |
86 | size_t value_len; | |
87 | }; | |
88 | ||
42492594 | 89 | ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t); |
8f0cfa52 | 90 | ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t); |
659564c8 | 91 | ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size); |
b1ab7e4b | 92 | int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int); |
8f0cfa52 DH |
93 | int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int); |
94 | int vfs_removexattr(struct dentry *, const char *); | |
5be196e5 | 95 | |
1da177e4 LT |
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); | |
1601fbad MZ |
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); | |
38f38657 AR |
104 | |
105 | struct simple_xattrs { | |
106 | struct list_head head; | |
107 | spinlock_t lock; | |
108 | }; | |
109 | ||
110 | struct simple_xattr { | |
111 | struct list_head list; | |
112 | char *name; | |
113 | size_t size; | |
114 | char value[0]; | |
115 | }; | |
116 | ||
117 | /* | |
118 | * initialize the simple_xattrs structure | |
119 | */ | |
120 | static inline void simple_xattrs_init(struct simple_xattrs *xattrs) | |
121 | { | |
122 | INIT_LIST_HEAD(&xattrs->head); | |
123 | spin_lock_init(&xattrs->lock); | |
124 | } | |
125 | ||
126 | /* | |
127 | * free all the xattrs | |
128 | */ | |
129 | static inline void simple_xattrs_free(struct simple_xattrs *xattrs) | |
130 | { | |
131 | struct simple_xattr *xattr, *node; | |
132 | ||
133 | list_for_each_entry_safe(xattr, node, &xattrs->head, list) { | |
134 | kfree(xattr->name); | |
135 | kfree(xattr); | |
136 | } | |
137 | } | |
138 | ||
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, | |
146 | size_t size); | |
147 | void simple_xattr_list_add(struct simple_xattrs *xattrs, | |
148 | struct simple_xattr *new_xattr); | |
149 | ||
5b0a2075 AB |
150 | #endif /* __KERNEL__ */ |
151 | ||
1da177e4 | 152 | #endif /* _LINUX_XATTR_H */ |