1/*
2 * This is <linux/capability.h>
3 *
4 * Andrew G. Morgan <morgan@kernel.org>
5 * Alexander Kjeldaas <astor@guardian.no>
6 * with help from Aleph1, Roland Buresund and Andrew Main.
7 *
8 * See here for the libcap library ("POSIX draft" compliance):
9 *
10 * ftp://linux.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/
11 */
12
13#ifndef _LINUX_CAPABILITY_H
14#define _LINUX_CAPABILITY_H
15
16#include <linux/types.h>
17
18struct task_struct;
19
20/* User-level do most of the mapping between kernel and user
21   capabilities based on the version tag given by the kernel. The
22   kernel might be somewhat backwards compatible, but don't bet on
23   it. */
24
25/* XXX - Note, cap_t, is defined by POSIX to be an "opaque" pointer to
26   a set of three capability sets.  The transposition of 3*the
27   following structure to such a composite is better handled in a user
28   library since the draft standard requires the use of malloc/free
29   etc.. */
30
31#define _LINUX_CAPABILITY_VERSION  0x19980330
32
33typedef struct __user_cap_header_struct {
34	__u32 version;
35	int pid;
36} *cap_user_header_t;
37
38typedef struct __user_cap_data_struct {
39        __u32 effective;
40        __u32 permitted;
41        __u32 inheritable;
42} *cap_user_data_t;
43
44#define XATTR_CAPS_SUFFIX "capability"
45#define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX
46
47#define XATTR_CAPS_SZ (3*sizeof(__le32))
48#define VFS_CAP_REVISION_MASK	0xFF000000
49#define VFS_CAP_REVISION_1	0x01000000
50
51#define VFS_CAP_REVISION	VFS_CAP_REVISION_1
52
53#define VFS_CAP_FLAGS_MASK	~VFS_CAP_REVISION_MASK
54#define VFS_CAP_FLAGS_EFFECTIVE	0x000001
55
56struct vfs_cap_data {
57	__u32 magic_etc;  /* Little endian */
58	__u32 permitted;    /* Little endian */
59	__u32 inheritable;  /* Little endian */
60};
61
62
63
64/**
65 ** POSIX-draft defined capabilities.
66 **/
67
68/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
69   overrides the restriction of changing file ownership and group
70   ownership. */
71
72#define CAP_CHOWN            0
73
74/* Override all DAC access, including ACL execute access if
75   [_POSIX_ACL] is defined. Excluding DAC access covered by
76   CAP_LINUX_IMMUTABLE. */
77
78#define CAP_DAC_OVERRIDE     1
79
80/* Overrides all DAC restrictions regarding read and search on files
81   and directories, including ACL restrictions if [_POSIX_ACL] is
82   defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
83
84#define CAP_DAC_READ_SEARCH  2
85
86/* Overrides all restrictions about allowed operations on files, where
87   file owner ID must be equal to the user ID, except where CAP_FSETID
88   is applicable. It doesn't override MAC and DAC restrictions. */
89
90#define CAP_FOWNER           3
91
92/* Overrides the following restrictions that the effective user ID
93   shall match the file owner ID when setting the S_ISUID and S_ISGID
94   bits on that file; that the effective group ID (or one of the
95   supplementary group IDs) shall match the file owner ID when setting
96   the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
97   cleared on successful return from chown(2) (not implemented). */
98
99#define CAP_FSETID           4
100
101/* Used to decide between falling back on the old suser() or fsuser(). */
102
103#define CAP_FS_MASK          0x1f
104
105/* Overrides the restriction that the real or effective user ID of a
106   process sending a signal must match the real or effective user ID
107   of the process receiving the signal. */
108
109#define CAP_KILL             5
110
111/* Allows setgid(2) manipulation */
112/* Allows setgroups(2) */
113/* Allows forged gids on socket credentials passing. */
114
115#define CAP_SETGID           6
116
117/* Allows set*uid(2) manipulation (including fsuid). */
118/* Allows forged pids on socket credentials passing. */
119
120#define CAP_SETUID           7
121
122
123/**
124 ** Linux-specific capabilities
125 **/
126
127/* Transfer any capability in your permitted set to any pid,
128   remove any capability in your permitted set from any pid */
129
130#define CAP_SETPCAP          8
131
132/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
133
134#define CAP_LINUX_IMMUTABLE  9
135
136/* Allows binding to TCP/UDP sockets below 1024 */
137/* Allows binding to ATM VCIs below 32 */
138
139#define CAP_NET_BIND_SERVICE 10
140
141/* Allow broadcasting, listen to multicast */
142
143#define CAP_NET_BROADCAST    11
144
145/* Allow interface configuration */
146/* Allow administration of IP firewall, masquerading and accounting */
147/* Allow setting debug option on sockets */
148/* Allow modification of routing tables */
149/* Allow setting arbitrary process / process group ownership on
150   sockets */
151/* Allow binding to any address for transparent proxying */
152/* Allow setting TOS (type of service) */
153/* Allow setting promiscuous mode */
154/* Allow clearing driver statistics */
155/* Allow multicasting */
156/* Allow read/write of device-specific registers */
157/* Allow activation of ATM control sockets */
158
159#define CAP_NET_ADMIN        12
160
161/* Allow use of RAW sockets */
162/* Allow use of PACKET sockets */
163
164#define CAP_NET_RAW          13
165
166/* Allow locking of shared memory segments */
167/* Allow mlock and mlockall (which doesn't really have anything to do
168   with IPC) */
169
170#define CAP_IPC_LOCK         14
171
172/* Override IPC ownership checks */
173
174#define CAP_IPC_OWNER        15
175
176/* Insert and remove kernel modules - modify kernel without limit */
177/* Modify cap_bset */
178#define CAP_SYS_MODULE       16
179
180/* Allow ioperm/iopl access */
181/* Allow sending USB messages to any device via /proc/bus/usb */
182
183#define CAP_SYS_RAWIO        17
184
185/* Allow use of chroot() */
186
187#define CAP_SYS_CHROOT       18
188
189/* Allow ptrace() of any process */
190
191#define CAP_SYS_PTRACE       19
192
193/* Allow configuration of process accounting */
194
195#define CAP_SYS_PACCT        20
196
197/* Allow configuration of the secure attention key */
198/* Allow administration of the random device */
199/* Allow examination and configuration of disk quotas */
200/* Allow configuring the kernel's syslog (printk behaviour) */
201/* Allow setting the domainname */
202/* Allow setting the hostname */
203/* Allow calling bdflush() */
204/* Allow mount() and umount(), setting up new smb connection */
205/* Allow some autofs root ioctls */
206/* Allow nfsservctl */
207/* Allow VM86_REQUEST_IRQ */
208/* Allow to read/write pci config on alpha */
209/* Allow irix_prctl on mips (setstacksize) */
210/* Allow flushing all cache on m68k (sys_cacheflush) */
211/* Allow removing semaphores */
212/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
213   and shared memory */
214/* Allow locking/unlocking of shared memory segment */
215/* Allow turning swap on/off */
216/* Allow forged pids on socket credentials passing */
217/* Allow setting readahead and flushing buffers on block devices */
218/* Allow setting geometry in floppy driver */
219/* Allow turning DMA on/off in xd driver */
220/* Allow administration of md devices (mostly the above, but some
221   extra ioctls) */
222/* Allow tuning the ide driver */
223/* Allow access to the nvram device */
224/* Allow administration of apm_bios, serial and bttv (TV) device */
225/* Allow manufacturer commands in isdn CAPI support driver */
226/* Allow reading non-standardized portions of pci configuration space */
227/* Allow DDI debug ioctl on sbpcd driver */
228/* Allow setting up serial ports */
229/* Allow sending raw qic-117 commands */
230/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
231   arbitrary SCSI commands */
232/* Allow setting encryption key on loopback filesystem */
233/* Allow setting zone reclaim policy */
234
235#define CAP_SYS_ADMIN        21
236
237/* Allow use of reboot() */
238
239#define CAP_SYS_BOOT         22
240
241/* Allow raising priority and setting priority on other (different
242   UID) processes */
243/* Allow use of FIFO and round-robin (realtime) scheduling on own
244   processes and setting the scheduling algorithm used by another
245   process. */
246/* Allow setting cpu affinity on other processes */
247
248#define CAP_SYS_NICE         23
249
250/* Override resource limits. Set resource limits. */
251/* Override quota limits. */
252/* Override reserved space on ext2 filesystem */
253/* Modify data journaling mode on ext3 filesystem (uses journaling
254   resources) */
255/* NOTE: ext2 honors fsuid when checking for resource overrides, so
256   you can override using fsuid too */
257/* Override size restrictions on IPC message queues */
258/* Allow more than 64hz interrupts from the real-time clock */
259/* Override max number of consoles on console allocation */
260/* Override max number of keymaps */
261
262#define CAP_SYS_RESOURCE     24
263
264/* Allow manipulation of system clock */
265/* Allow irix_stime on mips */
266/* Allow setting the real-time clock */
267
268#define CAP_SYS_TIME         25
269
270/* Allow configuration of tty devices */
271/* Allow vhangup() of tty */
272
273#define CAP_SYS_TTY_CONFIG   26
274
275/* Allow the privileged aspects of mknod() */
276
277#define CAP_MKNOD            27
278
279/* Allow taking of leases on files */
280
281#define CAP_LEASE            28
282
283#define CAP_AUDIT_WRITE      29
284
285#define CAP_AUDIT_CONTROL    30
286
287#define CAP_SETFCAP	     31
288
289
290#endif /* !_LINUX_CAPABILITY_H */
291