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
39typedef struct __user_cap_header_struct {
40 __u32 version;
41 int pid;
42} __user *cap_user_header_t;
43
44typedef 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
72struct 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 */
83struct 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 mount() and umount(), setting up new smb connection */
247/* Allow some autofs root ioctls */
248/* Allow nfsservctl */
249/* Allow VM86_REQUEST_IRQ */
250/* Allow to read/write pci config on alpha */
251/* Allow irix_prctl on mips (setstacksize) */
252/* Allow flushing all cache on m68k (sys_cacheflush) */
253/* Allow removing semaphores */
254/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
255 and shared memory */
256/* Allow locking/unlocking of shared memory segment */
257/* Allow turning swap on/off */
258/* Allow forged pids on socket credentials passing */
259/* Allow setting readahead and flushing buffers on block devices */
260/* Allow setting geometry in floppy driver */
261/* Allow turning DMA on/off in xd driver */
262/* Allow administration of md devices (mostly the above, but some
263 extra ioctls) */
264/* Allow tuning the ide driver */
265/* Allow access to the nvram device */
266/* Allow administration of apm_bios, serial and bttv (TV) device */
267/* Allow manufacturer commands in isdn CAPI support driver */
268/* Allow reading non-standardized portions of pci configuration space */
269/* Allow DDI debug ioctl on sbpcd driver */
270/* Allow setting up serial ports */
271/* Allow sending raw qic-117 commands */
272/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
273 arbitrary SCSI commands */
274/* Allow setting encryption key on loopback filesystem */
275/* Allow setting zone reclaim policy */
276/* Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility */
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/* Allow setting realtime ioprio class */
291/* Allow setting ioprio class on other processes */
292
293#define CAP_SYS_NICE 23
294
295/* Override resource limits. Set resource limits. */
296/* Override quota limits. */
297/* Override reserved space on ext2 filesystem */
298/* Modify data journaling mode on ext3 filesystem (uses journaling
299 resources) */
300/* NOTE: ext2 honors fsuid when checking for resource overrides, so
301 you can override using fsuid too */
302/* Override size restrictions on IPC message queues */
303/* Allow more than 64hz interrupts from the real-time clock */
304/* Override max number of consoles on console allocation */
305/* Override max number of keymaps */
306/* Control memory reclaim behavior */
307
308#define CAP_SYS_RESOURCE 24
309
310/* Allow manipulation of system clock */
311/* Allow irix_stime on mips */
312/* Allow setting the real-time clock */
313
314#define CAP_SYS_TIME 25
315
316/* Allow configuration of tty devices */
317/* Allow vhangup() of tty */
318
319#define CAP_SYS_TTY_CONFIG 26
320
321/* Allow the privileged aspects of mknod() */
322
323#define CAP_MKNOD 27
324
325/* Allow taking of leases on files */
326
327#define CAP_LEASE 28
328
329/* Allow writing the audit log via unicast netlink socket */
330
331#define CAP_AUDIT_WRITE 29
332
333/* Allow configuration of audit via unicast netlink socket */
334
335#define CAP_AUDIT_CONTROL 30
336
337/* Set or remove capabilities on files.
338 Map uid=0 into a child user namespace. */
339
340#define CAP_SETFCAP 31
341
342/* Override MAC access.
343 The base kernel enforces no MAC policy.
344 An LSM may enforce a MAC policy, and if it does and it chooses
345 to implement capability based overrides of that policy, this is
346 the capability it should use to do so. */
347
348#define CAP_MAC_OVERRIDE 32
349
350/* Allow MAC configuration or state changes.
351 The base kernel requires no MAC configuration.
352 An LSM may enforce a MAC policy, and if it does and it chooses
353 to implement capability based checks on modifications to that
354 policy or the data required to maintain it, this is the
355 capability it should use to do so. */
356
357#define CAP_MAC_ADMIN 33
358
359/* Allow configuring the kernel's syslog (printk behaviour) */
360
361#define CAP_SYSLOG 34
362
363/* Allow triggering something that will wake the system */
364
365#define CAP_WAKE_ALARM 35
366
367/* Allow preventing system suspends */
368
369#define CAP_BLOCK_SUSPEND 36
370
371/* Allow reading the audit log via multicast netlink socket */
372
373#define CAP_AUDIT_READ 37
374
375/*
376 * Allow system performance and observability privileged operations
377 * using perf_events, i915_perf and other kernel subsystems
378 */
379
380#define CAP_PERFMON 38
381
382/*
383 * CAP_BPF allows the following BPF operations:
384 * - Creating all types of BPF maps
385 * - Advanced verifier features
386 * - Indirect variable access
387 * - Bounded loops
388 * - BPF to BPF function calls
389 * - Scalar precision tracking
390 * - Larger complexity limits
391 * - Dead code elimination
392 * - And potentially other features
393 * - Loading BPF Type Format (BTF) data
394 * - Retrieve xlated and JITed code of BPF programs
395 * - Use bpf_spin_lock() helper
396 *
397 * CAP_PERFMON relaxes the verifier checks further:
398 * - BPF progs can use of pointer-to-integer conversions
399 * - speculation attack hardening measures are bypassed
400 * - bpf_probe_read to read arbitrary kernel memory is allowed
401 * - bpf_trace_printk to print kernel memory is allowed
402 *
403 * CAP_SYS_ADMIN is required to use bpf_probe_write_user.
404 *
405 * CAP_SYS_ADMIN is required to iterate system wide loaded
406 * programs, maps, links, BTFs and convert their IDs to file descriptors.
407 *
408 * CAP_PERFMON and CAP_BPF are required to load tracing programs.
409 * CAP_NET_ADMIN and CAP_BPF are required to load networking programs.
410 */
411#define CAP_BPF 39
412
413
414/* Allow checkpoint/restore related operations */
415/* Allow PID selection during clone3() */
416/* Allow writing to ns_last_pid */
417
418#define CAP_CHECKPOINT_RESTORE 40
419
420#define CAP_LAST_CAP CAP_CHECKPOINT_RESTORE
421
422#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
423
424/*
425 * Bit location of each capability (used by user-space library and kernel)
426 */
427
428#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
429#define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */
430
431
432#endif /* _UAPI_LINUX_CAPABILITY_H */
433

source code of linux/include/uapi/linux/capability.h