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