Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This is <linux/capability.h> | |
3 | * | |
b5376771 | 4 | * Andrew G. Morgan <morgan@kernel.org> |
1da177e4 LT |
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 | * | |
b5376771 SH |
10 | * ftp://linux.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/ |
11 | */ | |
1da177e4 LT |
12 | |
13 | #ifndef _LINUX_CAPABILITY_H | |
14 | #define _LINUX_CAPABILITY_H | |
15 | ||
16 | #include <linux/types.h> | |
1da177e4 | 17 | |
b7add02d AM |
18 | struct task_struct; |
19 | ||
1da177e4 LT |
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 | ||
e338d263 | 25 | /* Note, cap_t, is defined by POSIX (draft) to be an "opaque" pointer to |
1da177e4 LT |
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.. */ | |
b5376771 | 30 | |
e338d263 AM |
31 | #define _LINUX_CAPABILITY_VERSION_1 0x19980330 |
32 | #define _LINUX_CAPABILITY_U32S_1 1 | |
33 | ||
ca05a99a | 34 | #define _LINUX_CAPABILITY_VERSION_2 0x20071026 /* deprecated - use v3 */ |
e338d263 AM |
35 | #define _LINUX_CAPABILITY_U32S_2 2 |
36 | ||
ca05a99a AM |
37 | #define _LINUX_CAPABILITY_VERSION_3 0x20080522 |
38 | #define _LINUX_CAPABILITY_U32S_3 2 | |
1da177e4 LT |
39 | |
40 | typedef struct __user_cap_header_struct { | |
41 | __u32 version; | |
42 | int pid; | |
43 | } __user *cap_user_header_t; | |
b5376771 | 44 | |
1da177e4 LT |
45 | typedef struct __user_cap_data_struct { |
46 | __u32 effective; | |
47 | __u32 permitted; | |
48 | __u32 inheritable; | |
49 | } __user *cap_user_data_t; | |
1da177e4 | 50 | |
e338d263 | 51 | |
b5376771 SH |
52 | #define XATTR_CAPS_SUFFIX "capability" |
53 | #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX | |
54 | ||
b5376771 | 55 | #define VFS_CAP_REVISION_MASK 0xFF000000 |
e338d263 AM |
56 | #define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK |
57 | #define VFS_CAP_FLAGS_EFFECTIVE 0x000001 | |
58 | ||
b5376771 | 59 | #define VFS_CAP_REVISION_1 0x01000000 |
e338d263 AM |
60 | #define VFS_CAP_U32_1 1 |
61 | #define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1)) | |
b5376771 | 62 | |
e338d263 AM |
63 | #define VFS_CAP_REVISION_2 0x02000000 |
64 | #define VFS_CAP_U32_2 2 | |
65 | #define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2)) | |
66 | ||
67 | #define XATTR_CAPS_SZ XATTR_CAPS_SZ_2 | |
68 | #define VFS_CAP_U32 VFS_CAP_U32_2 | |
69 | #define VFS_CAP_REVISION VFS_CAP_REVISION_2 | |
b5376771 | 70 | |
b5376771 SH |
71 | |
72 | struct vfs_cap_data { | |
e338d263 | 73 | __le32 magic_etc; /* Little endian */ |
8f6936f4 | 74 | struct { |
e338d263 AM |
75 | __le32 permitted; /* Little endian */ |
76 | __le32 inheritable; /* Little endian */ | |
77 | } data[VFS_CAP_U32]; | |
b5376771 SH |
78 | }; |
79 | ||
ca05a99a AM |
80 | #ifndef __KERNEL__ |
81 | ||
82 | /* | |
83 | * Backwardly compatible definition for source code - trapped in a | |
84 | * 32-bit world. If you find you need this, please consider using | |
85 | * libcap to untrap yourself... | |
86 | */ | |
87 | #define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1 | |
88 | #define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1 | |
89 | ||
90 | #else | |
91 | ||
92 | #define _KERNEL_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_3 | |
93 | #define _KERNEL_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_3 | |
1da177e4 | 94 | |
1da177e4 | 95 | typedef struct kernel_cap_struct { |
ca05a99a | 96 | __u32 cap[_KERNEL_CAPABILITY_U32S]; |
1da177e4 LT |
97 | } kernel_cap_t; |
98 | ||
e338d263 | 99 | #define _USER_CAP_HEADER_SIZE (sizeof(struct __user_cap_header_struct)) |
1da177e4 LT |
100 | #define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t)) |
101 | ||
102 | #endif | |
103 | ||
104 | ||
105 | /** | |
b5376771 | 106 | ** POSIX-draft defined capabilities. |
1da177e4 LT |
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 | |
b5376771 | 126 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
e338d263 AM |
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) | |
3b7391de SH |
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 | |
3898b1b4 | 171 | * Allow modification of the securebits for a process |
e338d263 | 172 | */ |
1da177e4 LT |
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 */ | |
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 | ||
208 | #define CAP_NET_RAW 13 | |
209 | ||
210 | /* Allow locking of shared memory segments */ | |
211 | /* Allow mlock and mlockall (which doesn't really have anything to do | |
212 | with IPC) */ | |
213 | ||
214 | #define CAP_IPC_LOCK 14 | |
215 | ||
216 | /* Override IPC ownership checks */ | |
217 | ||
218 | #define CAP_IPC_OWNER 15 | |
219 | ||
220 | /* Insert and remove kernel modules - modify kernel without limit */ | |
1da177e4 LT |
221 | #define CAP_SYS_MODULE 16 |
222 | ||
223 | /* Allow ioperm/iopl access */ | |
224 | /* Allow sending USB messages to any device via /proc/bus/usb */ | |
225 | ||
226 | #define CAP_SYS_RAWIO 17 | |
227 | ||
228 | /* Allow use of chroot() */ | |
229 | ||
230 | #define CAP_SYS_CHROOT 18 | |
231 | ||
232 | /* Allow ptrace() of any process */ | |
233 | ||
234 | #define CAP_SYS_PTRACE 19 | |
235 | ||
236 | /* Allow configuration of process accounting */ | |
237 | ||
238 | #define CAP_SYS_PACCT 20 | |
239 | ||
240 | /* Allow configuration of the secure attention key */ | |
241 | /* Allow administration of the random device */ | |
242 | /* Allow examination and configuration of disk quotas */ | |
243 | /* Allow configuring the kernel's syslog (printk behaviour) */ | |
244 | /* Allow setting the domainname */ | |
245 | /* Allow setting the hostname */ | |
246 | /* Allow calling bdflush() */ | |
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 */ | |
bce5f6ba | 276 | /* Allow setting zone reclaim policy */ |
1da177e4 LT |
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 | ||
291 | #define CAP_SYS_NICE 23 | |
292 | ||
293 | /* Override resource limits. Set resource limits. */ | |
294 | /* Override quota limits. */ | |
295 | /* Override reserved space on ext2 filesystem */ | |
296 | /* Modify data journaling mode on ext3 filesystem (uses journaling | |
297 | resources) */ | |
b5376771 | 298 | /* NOTE: ext2 honors fsuid when checking for resource overrides, so |
1da177e4 LT |
299 | you can override using fsuid too */ |
300 | /* Override size restrictions on IPC message queues */ | |
301 | /* Allow more than 64hz interrupts from the real-time clock */ | |
302 | /* Override max number of consoles on console allocation */ | |
303 | /* Override max number of keymaps */ | |
304 | ||
305 | #define CAP_SYS_RESOURCE 24 | |
306 | ||
307 | /* Allow manipulation of system clock */ | |
308 | /* Allow irix_stime on mips */ | |
309 | /* Allow setting the real-time clock */ | |
310 | ||
311 | #define CAP_SYS_TIME 25 | |
312 | ||
313 | /* Allow configuration of tty devices */ | |
314 | /* Allow vhangup() of tty */ | |
315 | ||
316 | #define CAP_SYS_TTY_CONFIG 26 | |
317 | ||
318 | /* Allow the privileged aspects of mknod() */ | |
319 | ||
320 | #define CAP_MKNOD 27 | |
321 | ||
322 | /* Allow taking of leases on files */ | |
323 | ||
324 | #define CAP_LEASE 28 | |
325 | ||
326 | #define CAP_AUDIT_WRITE 29 | |
327 | ||
328 | #define CAP_AUDIT_CONTROL 30 | |
329 | ||
b5376771 SH |
330 | #define CAP_SETFCAP 31 |
331 | ||
e114e473 CS |
332 | /* Override MAC access. |
333 | The base kernel enforces no MAC policy. | |
334 | An LSM may enforce a MAC policy, and if it does and it chooses | |
335 | to implement capability based overrides of that policy, this is | |
336 | the capability it should use to do so. */ | |
337 | ||
338 | #define CAP_MAC_OVERRIDE 32 | |
339 | ||
340 | /* Allow MAC configuration or state changes. | |
341 | The base kernel requires no MAC configuration. | |
342 | An LSM may enforce a MAC policy, and if it does and it chooses | |
343 | to implement capability based checks on modifications to that | |
344 | policy or the data required to maintain it, this is the | |
345 | capability it should use to do so. */ | |
346 | ||
347 | #define CAP_MAC_ADMIN 33 | |
348 | ||
349 | #define CAP_LAST_CAP CAP_MAC_ADMIN | |
3b7391de SH |
350 | |
351 | #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) | |
352 | ||
e338d263 AM |
353 | /* |
354 | * Bit location of each capability (used by user-space library and kernel) | |
355 | */ | |
356 | ||
357 | #define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */ | |
358 | #define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */ | |
359 | ||
1da177e4 | 360 | #ifdef __KERNEL__ |
1da177e4 LT |
361 | |
362 | /* | |
363 | * Internal kernel functions only | |
364 | */ | |
b5376771 | 365 | |
e338d263 | 366 | #define CAP_FOR_EACH_U32(__capi) \ |
ca05a99a | 367 | for (__capi = 0; __capi < _KERNEL_CAPABILITY_U32S; ++__capi) |
e338d263 AM |
368 | |
369 | # define CAP_FS_MASK_B0 (CAP_TO_MASK(CAP_CHOWN) \ | |
370 | | CAP_TO_MASK(CAP_DAC_OVERRIDE) \ | |
371 | | CAP_TO_MASK(CAP_DAC_READ_SEARCH) \ | |
372 | | CAP_TO_MASK(CAP_FOWNER) \ | |
373 | | CAP_TO_MASK(CAP_FSETID)) | |
374 | ||
e114e473 CS |
375 | # define CAP_FS_MASK_B1 (CAP_TO_MASK(CAP_MAC_OVERRIDE)) |
376 | ||
ca05a99a | 377 | #if _KERNEL_CAPABILITY_U32S != 2 |
e338d263 AM |
378 | # error Fix up hand-coded capability macro initializers |
379 | #else /* HAND-CODED capability initializers */ | |
380 | ||
25f2ea9f DH |
381 | # define CAP_EMPTY_SET ((kernel_cap_t){{ 0, 0 }}) |
382 | # define CAP_FULL_SET ((kernel_cap_t){{ ~0, ~0 }}) | |
383 | # define CAP_INIT_EFF_SET ((kernel_cap_t){{ ~CAP_TO_MASK(CAP_SETPCAP), ~0 }}) | |
384 | # define CAP_FS_SET ((kernel_cap_t){{ CAP_FS_MASK_B0, CAP_FS_MASK_B1 } }) | |
385 | # define CAP_NFSD_SET ((kernel_cap_t){{ CAP_FS_MASK_B0|CAP_TO_MASK(CAP_SYS_RESOURCE), \ | |
386 | CAP_FS_MASK_B1 } }) | |
e338d263 | 387 | |
ca05a99a | 388 | #endif /* _KERNEL_CAPABILITY_U32S != 2 */ |
e338d263 AM |
389 | |
390 | #define CAP_INIT_INH_SET CAP_EMPTY_SET | |
391 | ||
392 | # define cap_clear(c) do { (c) = __cap_empty_set; } while (0) | |
393 | # define cap_set_full(c) do { (c) = __cap_full_set; } while (0) | |
394 | # define cap_set_init_eff(c) do { (c) = __cap_init_eff_set; } while (0) | |
395 | ||
396 | #define cap_raise(c, flag) ((c).cap[CAP_TO_INDEX(flag)] |= CAP_TO_MASK(flag)) | |
397 | #define cap_lower(c, flag) ((c).cap[CAP_TO_INDEX(flag)] &= ~CAP_TO_MASK(flag)) | |
398 | #define cap_raised(c, flag) ((c).cap[CAP_TO_INDEX(flag)] & CAP_TO_MASK(flag)) | |
399 | ||
400 | #define CAP_BOP_ALL(c, a, b, OP) \ | |
401 | do { \ | |
402 | unsigned __capi; \ | |
403 | CAP_FOR_EACH_U32(__capi) { \ | |
404 | c.cap[__capi] = a.cap[__capi] OP b.cap[__capi]; \ | |
405 | } \ | |
406 | } while (0) | |
407 | ||
408 | #define CAP_UOP_ALL(c, a, OP) \ | |
409 | do { \ | |
410 | unsigned __capi; \ | |
411 | CAP_FOR_EACH_U32(__capi) { \ | |
412 | c.cap[__capi] = OP a.cap[__capi]; \ | |
413 | } \ | |
414 | } while (0) | |
415 | ||
416 | static inline kernel_cap_t cap_combine(const kernel_cap_t a, | |
417 | const kernel_cap_t b) | |
418 | { | |
419 | kernel_cap_t dest; | |
420 | CAP_BOP_ALL(dest, a, b, |); | |
421 | return dest; | |
422 | } | |
1da177e4 | 423 | |
e338d263 AM |
424 | static inline kernel_cap_t cap_intersect(const kernel_cap_t a, |
425 | const kernel_cap_t b) | |
426 | { | |
427 | kernel_cap_t dest; | |
428 | CAP_BOP_ALL(dest, a, b, &); | |
429 | return dest; | |
430 | } | |
1da177e4 | 431 | |
e338d263 AM |
432 | static inline kernel_cap_t cap_drop(const kernel_cap_t a, |
433 | const kernel_cap_t drop) | |
434 | { | |
435 | kernel_cap_t dest; | |
436 | CAP_BOP_ALL(dest, a, drop, &~); | |
437 | return dest; | |
438 | } | |
1da177e4 | 439 | |
e338d263 AM |
440 | static inline kernel_cap_t cap_invert(const kernel_cap_t c) |
441 | { | |
442 | kernel_cap_t dest; | |
443 | CAP_UOP_ALL(dest, c, ~); | |
444 | return dest; | |
445 | } | |
1da177e4 | 446 | |
e338d263 AM |
447 | static inline int cap_isclear(const kernel_cap_t a) |
448 | { | |
449 | unsigned __capi; | |
450 | CAP_FOR_EACH_U32(__capi) { | |
451 | if (a.cap[__capi] != 0) | |
452 | return 0; | |
453 | } | |
454 | return 1; | |
455 | } | |
1da177e4 | 456 | |
e338d263 AM |
457 | static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set) |
458 | { | |
459 | kernel_cap_t dest; | |
460 | dest = cap_drop(a, set); | |
461 | return cap_isclear(dest); | |
462 | } | |
1da177e4 | 463 | |
e338d263 | 464 | /* Used to decide between falling back on the old suser() or fsuser(). */ |
1da177e4 | 465 | |
e338d263 | 466 | static inline int cap_is_fs_cap(int cap) |
1da177e4 | 467 | { |
e338d263 AM |
468 | const kernel_cap_t __cap_fs_set = CAP_FS_SET; |
469 | return !!(CAP_TO_MASK(cap) & __cap_fs_set.cap[CAP_TO_INDEX(cap)]); | |
1da177e4 LT |
470 | } |
471 | ||
e338d263 | 472 | static inline kernel_cap_t cap_drop_fs_set(const kernel_cap_t a) |
1da177e4 | 473 | { |
e338d263 AM |
474 | const kernel_cap_t __cap_fs_set = CAP_FS_SET; |
475 | return cap_drop(a, __cap_fs_set); | |
1da177e4 LT |
476 | } |
477 | ||
e338d263 AM |
478 | static inline kernel_cap_t cap_raise_fs_set(const kernel_cap_t a, |
479 | const kernel_cap_t permitted) | |
1da177e4 | 480 | { |
e338d263 AM |
481 | const kernel_cap_t __cap_fs_set = CAP_FS_SET; |
482 | return cap_combine(a, | |
483 | cap_intersect(permitted, __cap_fs_set)); | |
1da177e4 LT |
484 | } |
485 | ||
e338d263 | 486 | static inline kernel_cap_t cap_drop_nfsd_set(const kernel_cap_t a) |
1da177e4 | 487 | { |
e338d263 AM |
488 | const kernel_cap_t __cap_fs_set = CAP_NFSD_SET; |
489 | return cap_drop(a, __cap_fs_set); | |
1da177e4 LT |
490 | } |
491 | ||
e338d263 AM |
492 | static inline kernel_cap_t cap_raise_nfsd_set(const kernel_cap_t a, |
493 | const kernel_cap_t permitted) | |
494 | { | |
495 | const kernel_cap_t __cap_nfsd_set = CAP_NFSD_SET; | |
496 | return cap_combine(a, | |
497 | cap_intersect(permitted, __cap_nfsd_set)); | |
498 | } | |
1da177e4 | 499 | |
e338d263 AM |
500 | extern const kernel_cap_t __cap_empty_set; |
501 | extern const kernel_cap_t __cap_full_set; | |
502 | extern const kernel_cap_t __cap_init_eff_set; | |
1da177e4 | 503 | |
086f7316 AM |
504 | kernel_cap_t cap_set_effective(const kernel_cap_t pE_new); |
505 | ||
5cd9c58f DH |
506 | /** |
507 | * has_capability - Determine if a task has a superior capability available | |
508 | * @t: The task in question | |
509 | * @cap: The capability to be tested for | |
510 | * | |
511 | * Return true if the specified task has the given superior capability | |
512 | * currently in effect, false if not. | |
513 | * | |
514 | * Note that this does not set PF_SUPERPRIV on the task. | |
515 | */ | |
516 | #define has_capability(t, cap) (security_capable((t), (cap)) == 0) | |
517 | ||
518 | extern int capable(int cap); | |
c59ede7b | 519 | |
1da177e4 LT |
520 | #endif /* __KERNEL__ */ |
521 | ||
522 | #endif /* !_LINUX_CAPABILITY_H */ |