1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * This is <linux/capability.h>
4 *
5 * Andrew G. Morgan <morgan@kernel.org>
6 * Alexander Kjeldaas <astor@guardian.no>
7 * with help from Aleph1, Roland Buresund and Andrew Main.
8 *
9 * See here for the libcap library ("POSIX draft" compliance):
10 *
11 * ftp://www.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/
12 */
13
14 #ifndef _UAPI_LINUX_CAPABILITY_H
15 #define _UAPI_LINUX_CAPABILITY_H
16
17 #include <linux/types.h>
18
19 /* User-level do most of the mapping between kernel and user
20 capabilities based on the version tag given by the kernel. The
21 kernel might be somewhat backwards compatible, but don't bet on
22 it. */
23
24 /* Note, cap_t, is defined by POSIX (draft) to be an "opaque" pointer to
25 a set of three capability sets. The transposition of 3*the
26 following structure to such a composite is better handled in a user
27 library since the draft standard requires the use of malloc/free
28 etc.. */
29
30 #define _LINUX_CAPABILITY_VERSION_1 0x19980330
31 #define _LINUX_CAPABILITY_U32S_1 1
32
33 #define _LINUX_CAPABILITY_VERSION_2 0x20071026 /* deprecated - use v3 */
34 #define _LINUX_CAPABILITY_U32S_2 2
35
36 #define _LINUX_CAPABILITY_VERSION_3 0x20080522
37 #define _LINUX_CAPABILITY_U32S_3 2
38
39 typedef struct __user_cap_header_struct {
40 __u32 version;
41 int pid;
42 } __user *cap_user_header_t;
43
44 typedef struct __user_cap_data_struct {
45 __u32 effective;
46 __u32 permitted;
47 __u32 inheritable;
48 } __user *cap_user_data_t;
49
50
51 #define VFS_CAP_REVISION_MASK 0xFF000000
52 #define VFS_CAP_REVISION_SHIFT 24
53 #define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK
54 #define VFS_CAP_FLAGS_EFFECTIVE 0x000001
55
56 #define VFS_CAP_REVISION_1 0x01000000
57 #define VFS_CAP_U32_1 1
58 #define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1))
59
60 #define VFS_CAP_REVISION_2 0x02000000
61 #define VFS_CAP_U32_2 2
62 #define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2))
63
64 #define VFS_CAP_REVISION_3 0x03000000
65 #define VFS_CAP_U32_3 2
66 #define XATTR_CAPS_SZ_3 (sizeof(__le32)*(2 + 2*VFS_CAP_U32_3))
67
68 #define XATTR_CAPS_SZ XATTR_CAPS_SZ_3
69 #define VFS_CAP_U32 VFS_CAP_U32_3
70 #define VFS_CAP_REVISION VFS_CAP_REVISION_3
71
72 struct vfs_cap_data {
73 __le32 magic_etc; /* Little endian */
74 struct {
75 __le32 permitted; /* Little endian */
76 __le32 inheritable; /* Little endian */
77 } data[VFS_CAP_U32];
78 };
79
80 /*
81 * same as vfs_cap_data but with a rootid at the end
82 */
83 struct vfs_ns_cap_data {
84 __le32 magic_etc;
85 struct {
86 __le32 permitted; /* Little endian */
87 __le32 inheritable; /* Little endian */
88 } data[VFS_CAP_U32];
89 __le32 rootid;
90 };
91
92 #ifndef __KERNEL__
93
94 /*
95 * Backwardly compatible definition for source code - trapped in a
96 * 32-bit world. If you find you need this, please consider using
97 * libcap to untrap yourself...
98 */
99 #define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1
100 #define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1
101
102 #endif
103
104
105 /**
106 ** POSIX-draft defined capabilities.
107 **/
108
109 /* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
110 overrides the restriction of changing file ownership and group
111 ownership. */
112
113 #define CAP_CHOWN 0
114
115 /* Override all DAC access, including ACL execute access if
116 [_POSIX_ACL] is defined. Excluding DAC access covered by
117 CAP_LINUX_IMMUTABLE. */
118
119 #define CAP_DAC_OVERRIDE 1
120
121 /* Overrides all DAC restrictions regarding read and search on files
122 and directories, including ACL restrictions if [_POSIX_ACL] is
123 defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
124
125 #define CAP_DAC_READ_SEARCH 2
126
127 /* Overrides all restrictions about allowed operations on files, where
128 file owner ID must be equal to the user ID, except where CAP_FSETID
129 is applicable. It doesn't override MAC and DAC restrictions. */
130
131 #define CAP_FOWNER 3
132
133 /* Overrides the following restrictions that the effective user ID
134 shall match the file owner ID when setting the S_ISUID and S_ISGID
135 bits on that file; that the effective group ID (or one of the
136 supplementary group IDs) shall match the file owner ID when setting
137 the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
138 cleared on successful return from chown(2) (not implemented). */
139
140 #define CAP_FSETID 4
141
142 /* Overrides the restriction that the real or effective user ID of a
143 process sending a signal must match the real or effective user ID
144 of the process receiving the signal. */
145
146 #define CAP_KILL 5
147
148 /* Allows setgid(2) manipulation */
149 /* Allows setgroups(2) */
150 /* Allows forged gids on socket credentials passing. */
151
152 #define CAP_SETGID 6
153
154 /* Allows set*uid(2) manipulation (including fsuid). */
155 /* Allows forged pids on socket credentials passing. */
156
157 #define CAP_SETUID 7
158
159
160 /**
161 ** Linux-specific capabilities
162 **/
163
164 /* Without VFS support for capabilities:
165 * Transfer any capability in your permitted set to any pid,
166 * remove any capability in your permitted set from any pid
167 * With VFS support for capabilities (neither of above, but)
168 * Add any capability from current's capability bounding set
169 * to the current process' inheritable set
170 * Allow taking bits out of capability bounding set
171 * Allow modification of the securebits for a process
172 */
173
174 #define CAP_SETPCAP 8
175
176 /* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
177
178 #define CAP_LINUX_IMMUTABLE 9
179
180 /* Allows binding to TCP/UDP sockets below 1024 */
181 /* Allows binding to ATM VCIs below 32 */
182
183 #define CAP_NET_BIND_SERVICE 10
184
185 /* Allow broadcasting, listen to multicast */
186
187 #define CAP_NET_BROADCAST 11
188
189 /* Allow interface configuration */
190 /* Allow administration of IP firewall, masquerading and accounting */
191 /* Allow setting debug option on sockets */
192 /* Allow modification of routing tables */
193 /* Allow setting arbitrary process / process group ownership on
194 sockets */
195 /* Allow binding to any address for transparent proxying (also via NET_RAW) */
196 /* Allow setting TOS (type of service) */
197 /* Allow setting promiscuous mode */
198 /* Allow clearing driver statistics */
199 /* Allow multicasting */
200 /* Allow read/write of device-specific registers */
201 /* Allow activation of ATM control sockets */
202
203 #define CAP_NET_ADMIN 12
204
205 /* Allow use of RAW sockets */
206 /* Allow use of PACKET sockets */
207 /* Allow binding to any address for transparent proxying (also via NET_ADMIN) */
208
209 #define CAP_NET_RAW 13
210
211 /* Allow locking of shared memory segments */
212 /* Allow mlock and mlockall (which doesn't really have anything to do
213 with IPC) */
214
215 #define CAP_IPC_LOCK 14
216
217 /* Override IPC ownership checks */
218
219 #define CAP_IPC_OWNER 15
220
221 /* Insert and remove kernel modules - modify kernel without limit */
222 #define CAP_SYS_MODULE 16
223
224 /* Allow ioperm/iopl access */
225 /* Allow sending USB messages to any device via /dev/bus/usb */
226
227 #define CAP_SYS_RAWIO 17
228
229 /* Allow use of chroot() */
230
231 #define CAP_SYS_CHROOT 18
232
233 /* Allow ptrace() of any process */
234
235 #define CAP_SYS_PTRACE 19
236
237 /* Allow configuration of process accounting */
238
239 #define CAP_SYS_PACCT 20
240
241 /* Allow configuration of the secure attention key */
242 /* Allow administration of the random device */
243 /* Allow examination and configuration of disk quotas */
244 /* Allow setting the domainname */
245 /* Allow setting the hostname */
246 /* Allow calling bdflush() */
247 /* Allow mount() and umount(), setting up new smb connection */
248 /* Allow some autofs root ioctls */
249 /* Allow nfsservctl */
250 /* Allow VM86_REQUEST_IRQ */
251 /* Allow to read/write pci config on alpha */
252 /* Allow irix_prctl on mips (setstacksize) */
253 /* Allow flushing all cache on m68k (sys_cacheflush) */
254 /* Allow removing semaphores */
255 /* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
256 and shared memory */
257 /* Allow locking/unlocking of shared memory segment */
258 /* Allow turning swap on/off */
259 /* Allow forged pids on socket credentials passing */
260 /* Allow setting readahead and flushing buffers on block devices */
261 /* Allow setting geometry in floppy driver */
262 /* Allow turning DMA on/off in xd driver */
263 /* Allow administration of md devices (mostly the above, but some
264 extra ioctls) */
265 /* Allow tuning the ide driver */
266 /* Allow access to the nvram device */
267 /* Allow administration of apm_bios, serial and bttv (TV) device */
268 /* Allow manufacturer commands in isdn CAPI support driver */
269 /* Allow reading non-standardized portions of pci configuration space */
270 /* Allow DDI debug ioctl on sbpcd driver */
271 /* Allow setting up serial ports */
272 /* Allow sending raw qic-117 commands */
273 /* Allow enabling/disabling tagged queuing on SCSI controllers and sending
274 arbitrary SCSI commands */
275 /* Allow setting encryption key on loopback filesystem */
276 /* Allow setting zone reclaim policy */
277
278 #define CAP_SYS_ADMIN 21
279
280 /* Allow use of reboot() */
281
282 #define CAP_SYS_BOOT 22
283
284 /* Allow raising priority and setting priority on other (different
285 UID) processes */
286 /* Allow use of FIFO and round-robin (realtime) scheduling on own
287 processes and setting the scheduling algorithm used by another
288 process. */
289 /* Allow setting cpu affinity on other processes */
290
291 #define CAP_SYS_NICE 23
292
293 /* Override resource limits. Set resource limits. */
294 /* Override quota limits. */
295 /* Override reserved space on ext2 filesystem */
296 /* Modify data journaling mode on ext3 filesystem (uses journaling
297 resources) */
298 /* NOTE: ext2 honors fsuid when checking for resource overrides, so
299 you can override using fsuid too */
300 /* Override size restrictions on IPC message queues */
301 /* Allow more than 64hz interrupts from the real-time clock */
302 /* Override max number of consoles on console allocation */
303 /* Override max number of keymaps */
304
305 #define CAP_SYS_RESOURCE 24
306
307 /* Allow manipulation of system clock */
308 /* Allow irix_stime on mips */
309 /* Allow setting the real-time clock */
310
311 #define CAP_SYS_TIME 25
312
313 /* Allow configuration of tty devices */
314 /* Allow vhangup() of tty */
315
316 #define CAP_SYS_TTY_CONFIG 26
317
318 /* Allow the privileged aspects of mknod() */
319
320 #define CAP_MKNOD 27
321
322 /* Allow taking of leases on files */
323
324 #define CAP_LEASE 28
325
326 /* Allow writing the audit log via unicast netlink socket */
327
328 #define CAP_AUDIT_WRITE 29
329
330 /* Allow configuration of audit via unicast netlink socket */
331
332 #define CAP_AUDIT_CONTROL 30
333
334 #define CAP_SETFCAP 31
335
336 /* Override MAC access.
337 The base kernel enforces no MAC policy.
338 An LSM may enforce a MAC policy, and if it does and it chooses
339 to implement capability based overrides of that policy, this is
340 the capability it should use to do so. */
341
342 #define CAP_MAC_OVERRIDE 32
343
344 /* Allow MAC configuration or state changes.
345 The base kernel requires no MAC configuration.
346 An LSM may enforce a MAC policy, and if it does and it chooses
347 to implement capability based checks on modifications to that
348 policy or the data required to maintain it, this is the
349 capability it should use to do so. */
350
351 #define CAP_MAC_ADMIN 33
352
353 /* Allow configuring the kernel's syslog (printk behaviour) */
354
355 #define CAP_SYSLOG 34
356
357 /* Allow triggering something that will wake the system */
358
359 #define CAP_WAKE_ALARM 35
360
361 /* Allow preventing system suspends */
362
363 #define CAP_BLOCK_SUSPEND 36
364
365 /* Allow reading the audit log via multicast netlink socket */
366
367 #define CAP_AUDIT_READ 37
368
369
370 #define CAP_LAST_CAP CAP_AUDIT_READ
371
372 #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
373
374 /*
375 * Bit location of each capability (used by user-space library and kernel)
376 */
377
378 #define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
379 #define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */
380
381
382 #endif /* _UAPI_LINUX_CAPABILITY_H */