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Diffstat (limited to 'include/linux/capability.h')
-rw-r--r-- | include/linux/capability.h | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/include/linux/capability.h b/include/linux/capability.h new file mode 100644 index 000000000000..8d139f4acf23 --- /dev/null +++ b/include/linux/capability.h | |||
@@ -0,0 +1,360 @@ | |||
1 | /* | ||
2 | * This is <linux/capability.h> | ||
3 | * | ||
4 | * Andrew G. Morgan <morgan@transmeta.com> | ||
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-2.2/ | ||
11 | */ | ||
12 | |||
13 | #ifndef _LINUX_CAPABILITY_H | ||
14 | #define _LINUX_CAPABILITY_H | ||
15 | |||
16 | #include <linux/types.h> | ||
17 | #include <linux/compiler.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 | /* XXX - Note, cap_t, is defined by POSIX 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 0x19980330 | ||
31 | |||
32 | typedef struct __user_cap_header_struct { | ||
33 | __u32 version; | ||
34 | int pid; | ||
35 | } __user *cap_user_header_t; | ||
36 | |||
37 | typedef struct __user_cap_data_struct { | ||
38 | __u32 effective; | ||
39 | __u32 permitted; | ||
40 | __u32 inheritable; | ||
41 | } __user *cap_user_data_t; | ||
42 | |||
43 | #ifdef __KERNEL__ | ||
44 | |||
45 | #include <linux/spinlock.h> | ||
46 | |||
47 | /* #define STRICT_CAP_T_TYPECHECKS */ | ||
48 | |||
49 | #ifdef STRICT_CAP_T_TYPECHECKS | ||
50 | |||
51 | typedef struct kernel_cap_struct { | ||
52 | __u32 cap; | ||
53 | } kernel_cap_t; | ||
54 | |||
55 | #else | ||
56 | |||
57 | typedef __u32 kernel_cap_t; | ||
58 | |||
59 | #endif | ||
60 | |||
61 | #define _USER_CAP_HEADER_SIZE (2*sizeof(__u32)) | ||
62 | #define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t)) | ||
63 | |||
64 | #endif | ||
65 | |||
66 | |||
67 | /** | ||
68 | ** POSIX-draft defined capabilities. | ||
69 | **/ | ||
70 | |||
71 | /* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this | ||
72 | overrides the restriction of changing file ownership and group | ||
73 | ownership. */ | ||
74 | |||
75 | #define CAP_CHOWN 0 | ||
76 | |||
77 | /* Override all DAC access, including ACL execute access if | ||
78 | [_POSIX_ACL] is defined. Excluding DAC access covered by | ||
79 | CAP_LINUX_IMMUTABLE. */ | ||
80 | |||
81 | #define CAP_DAC_OVERRIDE 1 | ||
82 | |||
83 | /* Overrides all DAC restrictions regarding read and search on files | ||
84 | and directories, including ACL restrictions if [_POSIX_ACL] is | ||
85 | defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */ | ||
86 | |||
87 | #define CAP_DAC_READ_SEARCH 2 | ||
88 | |||
89 | /* Overrides all restrictions about allowed operations on files, where | ||
90 | file owner ID must be equal to the user ID, except where CAP_FSETID | ||
91 | is applicable. It doesn't override MAC and DAC restrictions. */ | ||
92 | |||
93 | #define CAP_FOWNER 3 | ||
94 | |||
95 | /* Overrides the following restrictions that the effective user ID | ||
96 | shall match the file owner ID when setting the S_ISUID and S_ISGID | ||
97 | bits on that file; that the effective group ID (or one of the | ||
98 | supplementary group IDs) shall match the file owner ID when setting | ||
99 | the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are | ||
100 | cleared on successful return from chown(2) (not implemented). */ | ||
101 | |||
102 | #define CAP_FSETID 4 | ||
103 | |||
104 | /* Used to decide between falling back on the old suser() or fsuser(). */ | ||
105 | |||
106 | #define CAP_FS_MASK 0x1f | ||
107 | |||
108 | /* Overrides the restriction that the real or effective user ID of a | ||
109 | process sending a signal must match the real or effective user ID | ||
110 | of the process receiving the signal. */ | ||
111 | |||
112 | #define CAP_KILL 5 | ||
113 | |||
114 | /* Allows setgid(2) manipulation */ | ||
115 | /* Allows setgroups(2) */ | ||
116 | /* Allows forged gids on socket credentials passing. */ | ||
117 | |||
118 | #define CAP_SETGID 6 | ||
119 | |||
120 | /* Allows set*uid(2) manipulation (including fsuid). */ | ||
121 | /* Allows forged pids on socket credentials passing. */ | ||
122 | |||
123 | #define CAP_SETUID 7 | ||
124 | |||
125 | |||
126 | /** | ||
127 | ** Linux-specific capabilities | ||
128 | **/ | ||
129 | |||
130 | /* Transfer any capability in your permitted set to any pid, | ||
131 | remove any capability in your permitted set from any pid */ | ||
132 | |||
133 | #define CAP_SETPCAP 8 | ||
134 | |||
135 | /* Allow modification of S_IMMUTABLE and S_APPEND file attributes */ | ||
136 | |||
137 | #define CAP_LINUX_IMMUTABLE 9 | ||
138 | |||
139 | /* Allows binding to TCP/UDP sockets below 1024 */ | ||
140 | /* Allows binding to ATM VCIs below 32 */ | ||
141 | |||
142 | #define CAP_NET_BIND_SERVICE 10 | ||
143 | |||
144 | /* Allow broadcasting, listen to multicast */ | ||
145 | |||
146 | #define CAP_NET_BROADCAST 11 | ||
147 | |||
148 | /* Allow interface configuration */ | ||
149 | /* Allow administration of IP firewall, masquerading and accounting */ | ||
150 | /* Allow setting debug option on sockets */ | ||
151 | /* Allow modification of routing tables */ | ||
152 | /* Allow setting arbitrary process / process group ownership on | ||
153 | sockets */ | ||
154 | /* Allow binding to any address for transparent proxying */ | ||
155 | /* Allow setting TOS (type of service) */ | ||
156 | /* Allow setting promiscuous mode */ | ||
157 | /* Allow clearing driver statistics */ | ||
158 | /* Allow multicasting */ | ||
159 | /* Allow read/write of device-specific registers */ | ||
160 | /* Allow activation of ATM control sockets */ | ||
161 | |||
162 | #define CAP_NET_ADMIN 12 | ||
163 | |||
164 | /* Allow use of RAW sockets */ | ||
165 | /* Allow use of PACKET sockets */ | ||
166 | |||
167 | #define CAP_NET_RAW 13 | ||
168 | |||
169 | /* Allow locking of shared memory segments */ | ||
170 | /* Allow mlock and mlockall (which doesn't really have anything to do | ||
171 | with IPC) */ | ||
172 | |||
173 | #define CAP_IPC_LOCK 14 | ||
174 | |||
175 | /* Override IPC ownership checks */ | ||
176 | |||
177 | #define CAP_IPC_OWNER 15 | ||
178 | |||
179 | /* Insert and remove kernel modules - modify kernel without limit */ | ||
180 | /* Modify cap_bset */ | ||
181 | #define CAP_SYS_MODULE 16 | ||
182 | |||
183 | /* Allow ioperm/iopl access */ | ||
184 | /* Allow sending USB messages to any device via /proc/bus/usb */ | ||
185 | |||
186 | #define CAP_SYS_RAWIO 17 | ||
187 | |||
188 | /* Allow use of chroot() */ | ||
189 | |||
190 | #define CAP_SYS_CHROOT 18 | ||
191 | |||
192 | /* Allow ptrace() of any process */ | ||
193 | |||
194 | #define CAP_SYS_PTRACE 19 | ||
195 | |||
196 | /* Allow configuration of process accounting */ | ||
197 | |||
198 | #define CAP_SYS_PACCT 20 | ||
199 | |||
200 | /* Allow configuration of the secure attention key */ | ||
201 | /* Allow administration of the random device */ | ||
202 | /* Allow examination and configuration of disk quotas */ | ||
203 | /* Allow configuring the kernel's syslog (printk behaviour) */ | ||
204 | /* Allow setting the domainname */ | ||
205 | /* Allow setting the hostname */ | ||
206 | /* Allow calling bdflush() */ | ||
207 | /* Allow mount() and umount(), setting up new smb connection */ | ||
208 | /* Allow some autofs root ioctls */ | ||
209 | /* Allow nfsservctl */ | ||
210 | /* Allow VM86_REQUEST_IRQ */ | ||
211 | /* Allow to read/write pci config on alpha */ | ||
212 | /* Allow irix_prctl on mips (setstacksize) */ | ||
213 | /* Allow flushing all cache on m68k (sys_cacheflush) */ | ||
214 | /* Allow removing semaphores */ | ||
215 | /* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores | ||
216 | and shared memory */ | ||
217 | /* Allow locking/unlocking of shared memory segment */ | ||
218 | /* Allow turning swap on/off */ | ||
219 | /* Allow forged pids on socket credentials passing */ | ||
220 | /* Allow setting readahead and flushing buffers on block devices */ | ||
221 | /* Allow setting geometry in floppy driver */ | ||
222 | /* Allow turning DMA on/off in xd driver */ | ||
223 | /* Allow administration of md devices (mostly the above, but some | ||
224 | extra ioctls) */ | ||
225 | /* Allow tuning the ide driver */ | ||
226 | /* Allow access to the nvram device */ | ||
227 | /* Allow administration of apm_bios, serial and bttv (TV) device */ | ||
228 | /* Allow manufacturer commands in isdn CAPI support driver */ | ||
229 | /* Allow reading non-standardized portions of pci configuration space */ | ||
230 | /* Allow DDI debug ioctl on sbpcd driver */ | ||
231 | /* Allow setting up serial ports */ | ||
232 | /* Allow sending raw qic-117 commands */ | ||
233 | /* Allow enabling/disabling tagged queuing on SCSI controllers and sending | ||
234 | arbitrary SCSI commands */ | ||
235 | /* Allow setting encryption key on loopback filesystem */ | ||
236 | |||
237 | #define CAP_SYS_ADMIN 21 | ||
238 | |||
239 | /* Allow use of reboot() */ | ||
240 | |||
241 | #define CAP_SYS_BOOT 22 | ||
242 | |||
243 | /* Allow raising priority and setting priority on other (different | ||
244 | UID) processes */ | ||
245 | /* Allow use of FIFO and round-robin (realtime) scheduling on own | ||
246 | processes and setting the scheduling algorithm used by another | ||
247 | process. */ | ||
248 | /* Allow setting cpu affinity on other processes */ | ||
249 | |||
250 | #define CAP_SYS_NICE 23 | ||
251 | |||
252 | /* Override resource limits. Set resource limits. */ | ||
253 | /* Override quota limits. */ | ||
254 | /* Override reserved space on ext2 filesystem */ | ||
255 | /* Modify data journaling mode on ext3 filesystem (uses journaling | ||
256 | resources) */ | ||
257 | /* NOTE: ext2 honors fsuid when checking for resource overrides, so | ||
258 | you can override using fsuid too */ | ||
259 | /* Override size restrictions on IPC message queues */ | ||
260 | /* Allow more than 64hz interrupts from the real-time clock */ | ||
261 | /* Override max number of consoles on console allocation */ | ||
262 | /* Override max number of keymaps */ | ||
263 | |||
264 | #define CAP_SYS_RESOURCE 24 | ||
265 | |||
266 | /* Allow manipulation of system clock */ | ||
267 | /* Allow irix_stime on mips */ | ||
268 | /* Allow setting the real-time clock */ | ||
269 | |||
270 | #define CAP_SYS_TIME 25 | ||
271 | |||
272 | /* Allow configuration of tty devices */ | ||
273 | /* Allow vhangup() of tty */ | ||
274 | |||
275 | #define CAP_SYS_TTY_CONFIG 26 | ||
276 | |||
277 | /* Allow the privileged aspects of mknod() */ | ||
278 | |||
279 | #define CAP_MKNOD 27 | ||
280 | |||
281 | /* Allow taking of leases on files */ | ||
282 | |||
283 | #define CAP_LEASE 28 | ||
284 | |||
285 | #define CAP_AUDIT_WRITE 29 | ||
286 | |||
287 | #define CAP_AUDIT_CONTROL 30 | ||
288 | |||
289 | #ifdef __KERNEL__ | ||
290 | /* | ||
291 | * Bounding set | ||
292 | */ | ||
293 | extern kernel_cap_t cap_bset; | ||
294 | |||
295 | /* | ||
296 | * Internal kernel functions only | ||
297 | */ | ||
298 | |||
299 | #ifdef STRICT_CAP_T_TYPECHECKS | ||
300 | |||
301 | #define to_cap_t(x) { x } | ||
302 | #define cap_t(x) (x).cap | ||
303 | |||
304 | #else | ||
305 | |||
306 | #define to_cap_t(x) (x) | ||
307 | #define cap_t(x) (x) | ||
308 | |||
309 | #endif | ||
310 | |||
311 | #define CAP_EMPTY_SET to_cap_t(0) | ||
312 | #define CAP_FULL_SET to_cap_t(~0) | ||
313 | #define CAP_INIT_EFF_SET to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP)) | ||
314 | #define CAP_INIT_INH_SET to_cap_t(0) | ||
315 | |||
316 | #define CAP_TO_MASK(x) (1 << (x)) | ||
317 | #define cap_raise(c, flag) (cap_t(c) |= CAP_TO_MASK(flag)) | ||
318 | #define cap_lower(c, flag) (cap_t(c) &= ~CAP_TO_MASK(flag)) | ||
319 | #define cap_raised(c, flag) (cap_t(c) & CAP_TO_MASK(flag)) | ||
320 | |||
321 | static inline kernel_cap_t cap_combine(kernel_cap_t a, kernel_cap_t b) | ||
322 | { | ||
323 | kernel_cap_t dest; | ||
324 | cap_t(dest) = cap_t(a) | cap_t(b); | ||
325 | return dest; | ||
326 | } | ||
327 | |||
328 | static inline kernel_cap_t cap_intersect(kernel_cap_t a, kernel_cap_t b) | ||
329 | { | ||
330 | kernel_cap_t dest; | ||
331 | cap_t(dest) = cap_t(a) & cap_t(b); | ||
332 | return dest; | ||
333 | } | ||
334 | |||
335 | static inline kernel_cap_t cap_drop(kernel_cap_t a, kernel_cap_t drop) | ||
336 | { | ||
337 | kernel_cap_t dest; | ||
338 | cap_t(dest) = cap_t(a) & ~cap_t(drop); | ||
339 | return dest; | ||
340 | } | ||
341 | |||
342 | static inline kernel_cap_t cap_invert(kernel_cap_t c) | ||
343 | { | ||
344 | kernel_cap_t dest; | ||
345 | cap_t(dest) = ~cap_t(c); | ||
346 | return dest; | ||
347 | } | ||
348 | |||
349 | #define cap_isclear(c) (!cap_t(c)) | ||
350 | #define cap_issubset(a,set) (!(cap_t(a) & ~cap_t(set))) | ||
351 | |||
352 | #define cap_clear(c) do { cap_t(c) = 0; } while(0) | ||
353 | #define cap_set_full(c) do { cap_t(c) = ~0; } while(0) | ||
354 | #define cap_mask(c,mask) do { cap_t(c) &= cap_t(mask); } while(0) | ||
355 | |||
356 | #define cap_is_fs_cap(c) (CAP_TO_MASK(c) & CAP_FS_MASK) | ||
357 | |||
358 | #endif /* __KERNEL__ */ | ||
359 | |||
360 | #endif /* !_LINUX_CAPABILITY_H */ | ||