Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
44struct __user_cap_data_struct {
45 __u32 effective;
46 __u32 permitted;
47 __u32 inheritable;
48};
49typedef struct __user_cap_data_struct __user *cap_user_data_t;
50
51
52#define VFS_CAP_REVISION_MASK 0xFF000000
53#define VFS_CAP_REVISION_SHIFT 24
54#define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK
55#define VFS_CAP_FLAGS_EFFECTIVE 0x000001
56
57#define VFS_CAP_REVISION_1 0x01000000
58#define VFS_CAP_U32_1 1
59#define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1))
60
61#define VFS_CAP_REVISION_2 0x02000000
62#define VFS_CAP_U32_2 2
63#define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2))
64
65#define VFS_CAP_REVISION_3 0x03000000
66#define VFS_CAP_U32_3 2
67#define XATTR_CAPS_SZ_3 (sizeof(__le32)*(2 + 2*VFS_CAP_U32_3))
68
69#define XATTR_CAPS_SZ XATTR_CAPS_SZ_3
70#define VFS_CAP_U32 VFS_CAP_U32_3
71#define VFS_CAP_REVISION VFS_CAP_REVISION_3
72
73struct vfs_cap_data {
74 __le32 magic_etc; /* Little endian */
75 struct {
76 __le32 permitted; /* Little endian */
77 __le32 inheritable; /* Little endian */
78 } data[VFS_CAP_U32];
79};
80
81/*
82 * same as vfs_cap_data but with a rootid at the end
83 */
84struct vfs_ns_cap_data {
85 __le32 magic_etc;
86 struct {
87 __le32 permitted; /* Little endian */
88 __le32 inheritable; /* Little endian */
89 } data[VFS_CAP_U32];
90 __le32 rootid;
91};
92
93#ifndef __KERNEL__
94
95/*
96 * Backwardly compatible definition for source code - trapped in a
97 * 32-bit world. If you find you need this, please consider using
98 * libcap to untrap yourself...
99 */
100#define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1
101#define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1
102
103#endif
104
105
106/**
107 ** POSIX-draft defined capabilities.
108 **/
109
110/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
111 overrides the restriction of changing file ownership and group
112 ownership. */
113
114#define CAP_CHOWN 0
115
116/* Override all DAC access, including ACL execute access if
117 [_POSIX_ACL] is defined. Excluding DAC access covered by
118 CAP_LINUX_IMMUTABLE. */
119
120#define CAP_DAC_OVERRIDE 1
121
122/* Overrides all DAC restrictions regarding read and search on files
123 and directories, including ACL restrictions if [_POSIX_ACL] is
124 defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
125
126#define CAP_DAC_READ_SEARCH 2
127
128/* Overrides all restrictions about allowed operations on files, where
129 file owner ID must be equal to the user ID, except where CAP_FSETID
130 is applicable. It doesn't override MAC and DAC restrictions. */
131
132#define CAP_FOWNER 3
133
134/* Overrides the following restrictions that the effective user ID
135 shall match the file owner ID when setting the S_ISUID and S_ISGID
136 bits on that file; that the effective group ID (or one of the
137 supplementary group IDs) shall match the file owner ID when setting
138 the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
139 cleared on successful return from chown(2) (not implemented). */
140
141#define CAP_FSETID 4
142
143/* Overrides the restriction that the real or effective user ID of a
144 process sending a signal must match the real or effective user ID
145 of the process receiving the signal. */
146
147#define CAP_KILL 5
148
149/* Allows setgid(2) manipulation */
150/* Allows setgroups(2) */
151/* Allows forged gids on socket credentials passing. */
152
153#define CAP_SETGID 6
154
155/* Allows set*uid(2) manipulation (including fsuid). */
156/* Allows forged pids on socket credentials passing. */
157
158#define CAP_SETUID 7
159
160
161/**
162 ** Linux-specific capabilities
163 **/
164
165/* Without VFS support for capabilities:
166 * Transfer any capability in your permitted set to any pid,
167 * remove any capability in your permitted set from any pid
168 * With VFS support for capabilities (neither of above, but)
169 * Add any capability from current's capability bounding set
170 * to the current process' inheritable set
171 * Allow taking bits out of capability bounding set
172 * Allow modification of the securebits for a process
173 */
174
175#define CAP_SETPCAP 8
176
177/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
178
179#define CAP_LINUX_IMMUTABLE 9
180
181/* Allows binding to TCP/UDP sockets below 1024 */
182/* Allows binding to ATM VCIs below 32 */
183
184#define CAP_NET_BIND_SERVICE 10
185
186/* Allow broadcasting, listen to multicast */
187
188#define CAP_NET_BROADCAST 11
189
190/* Allow interface configuration */
191/* Allow administration of IP firewall, masquerading and accounting */
192/* Allow setting debug option on sockets */
193/* Allow modification of routing tables */
194/* Allow setting arbitrary process / process group ownership on
195 sockets */
196/* Allow binding to any address for transparent proxying (also via NET_RAW) */
197/* Allow setting TOS (type of service) */
198/* Allow setting promiscuous mode */
199/* Allow clearing driver statistics */
200/* Allow multicasting */
201/* Allow read/write of device-specific registers */
202/* Allow activation of ATM control sockets */
203
204#define CAP_NET_ADMIN 12
205
206/* Allow use of RAW sockets */
207/* Allow use of PACKET sockets */
208/* Allow binding to any address for transparent proxying (also via NET_ADMIN) */
209
210#define CAP_NET_RAW 13
211
212/* Allow locking of shared memory segments */
213/* Allow mlock and mlockall (which doesn't really have anything to do
214 with IPC) */
215
216#define CAP_IPC_LOCK 14
217
218/* Override IPC ownership checks */
219
220#define CAP_IPC_OWNER 15
221
222/* Insert and remove kernel modules - modify kernel without limit */
223#define CAP_SYS_MODULE 16
224
225/* Allow ioperm/iopl access */
226/* Allow sending USB messages to any device via /dev/bus/usb */
227
228#define CAP_SYS_RAWIO 17
229
230/* Allow use of chroot() */
231
232#define CAP_SYS_CHROOT 18
233
234/* Allow ptrace() of any process */
235
236#define CAP_SYS_PTRACE 19
237
238/* Allow configuration of process accounting */
239
240#define CAP_SYS_PACCT 20
241
242/* Allow configuration of the secure attention key */
243/* Allow administration of the random device */
244/* Allow examination and configuration of disk quotas */
245/* Allow setting the domainname */
246/* Allow setting the hostname */
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/* Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility */
278/* Allow setting hardware protection emergency action */
279
280#define CAP_SYS_ADMIN 21
281
282/* Allow use of reboot() */
283
284#define CAP_SYS_BOOT 22
285
286/* Allow raising priority and setting priority on other (different
287 UID) processes */
288/* Allow use of FIFO and round-robin (realtime) scheduling on own
289 processes and setting the scheduling algorithm used by another
290 process. */
291/* Allow setting cpu affinity on other processes */
292/* Allow setting realtime ioprio class */
293/* Allow setting ioprio class on other processes */
294
295#define CAP_SYS_NICE 23
296
297/* Override resource limits. Set resource limits. */
298/* Override quota limits. */
299/* Override reserved space on ext2 filesystem */
300/* Modify data journaling mode on ext3 filesystem (uses journaling
301 resources) */
302/* NOTE: ext2 honors fsuid when checking for resource overrides, so
303 you can override using fsuid too */
304/* Override size restrictions on IPC message queues */
305/* Allow more than 64hz interrupts from the real-time clock */
306/* Override max number of consoles on console allocation */
307/* Override max number of keymaps */
308/* Control memory reclaim behavior */
309
310#define CAP_SYS_RESOURCE 24
311
312/* Allow manipulation of system clock */
313/* Allow irix_stime on mips */
314/* Allow setting the real-time clock */
315
316#define CAP_SYS_TIME 25
317
318/* Allow configuration of tty devices */
319/* Allow vhangup() of tty */
320
321#define CAP_SYS_TTY_CONFIG 26
322
323/* Allow the privileged aspects of mknod() */
324
325#define CAP_MKNOD 27
326
327/* Allow taking of leases on files */
328
329#define CAP_LEASE 28
330
331/* Allow writing the audit log via unicast netlink socket */
332
333#define CAP_AUDIT_WRITE 29
334
335/* Allow configuration of audit via unicast netlink socket */
336
337#define CAP_AUDIT_CONTROL 30
338
339/* Set or remove capabilities on files.
340 Map uid=0 into a child user namespace. */
341
342#define CAP_SETFCAP 31
343
344/* Override MAC access.
345 The base kernel enforces no MAC policy.
346 An LSM may enforce a MAC policy, and if it does and it chooses
347 to implement capability based overrides of that policy, this is
348 the capability it should use to do so. */
349
350#define CAP_MAC_OVERRIDE 32
351
352/* Allow MAC configuration or state changes.
353 The base kernel requires no MAC configuration.
354 An LSM may enforce a MAC policy, and if it does and it chooses
355 to implement capability based checks on modifications to that
356 policy or the data required to maintain it, this is the
357 capability it should use to do so. */
358
359#define CAP_MAC_ADMIN 33
360
361/* Allow configuring the kernel's syslog (printk behaviour) */
362
363#define CAP_SYSLOG 34
364
365/* Allow triggering something that will wake the system */
366
367#define CAP_WAKE_ALARM 35
368
369/* Allow preventing system suspends */
370
371#define CAP_BLOCK_SUSPEND 36
372
373/* Allow reading the audit log via multicast netlink socket */
374
375#define CAP_AUDIT_READ 37
376
377/*
378 * Allow system performance and observability privileged operations
379 * using perf_events, i915_perf and other kernel subsystems
380 */
381
382#define CAP_PERFMON 38
383
384/*
385 * CAP_BPF allows the following BPF operations:
386 * - Creating all types of BPF maps
387 * - Advanced verifier features
388 * - Indirect variable access
389 * - Bounded loops
390 * - BPF to BPF function calls
391 * - Scalar precision tracking
392 * - Larger complexity limits
393 * - Dead code elimination
394 * - And potentially other features
395 * - Loading BPF Type Format (BTF) data
396 * - Retrieve xlated and JITed code of BPF programs
397 * - Use bpf_spin_lock() helper
398 *
399 * CAP_PERFMON relaxes the verifier checks further:
400 * - BPF progs can use of pointer-to-integer conversions
401 * - speculation attack hardening measures are bypassed
402 * - bpf_probe_read to read arbitrary kernel memory is allowed
403 * - bpf_trace_printk to print kernel memory is allowed
404 *
405 * CAP_SYS_ADMIN is required to use bpf_probe_write_user.
406 *
407 * CAP_SYS_ADMIN is required to iterate system wide loaded
408 * programs, maps, links, BTFs and convert their IDs to file descriptors.
409 *
410 * CAP_PERFMON and CAP_BPF are required to load tracing programs.
411 * CAP_NET_ADMIN and CAP_BPF are required to load networking programs.
412 */
413#define CAP_BPF 39
414
415
416/* Allow checkpoint/restore related operations */
417/* Allow PID selection during clone3() */
418/* Allow writing to ns_last_pid */
419
420#define CAP_CHECKPOINT_RESTORE 40
421
422#define CAP_LAST_CAP CAP_CHECKPOINT_RESTORE
423
424#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
425
426/*
427 * Bit location of each capability (used by user-space library and kernel)
428 */
429
430#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
431#define CAP_TO_MASK(x) (1U << ((x) & 31)) /* mask for indexed __u32 */
432
433
434#endif /* _UAPI_LINUX_CAPABILITY_H */