[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / capability.h

/*
 * This is <linux/capability.h>
 *
 * Andrew G. Morgan <morgan@transmeta.com>
 * Alexander Kjeldaas <astor@guardian.no>
 * with help from Aleph1, Roland Buresund and Andrew Main.
 *
 * See here for the libcap library ("POSIX draft" compliance):
 *
 * ftp://linux.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.2/
 */ 

#ifndef _LINUX_CAPABILITY_H
#define _LINUX_CAPABILITY_H

#include <linux/types.h>
#include <linux/compiler.h>

/* User-level do most of the mapping between kernel and user
   capabilities based on the version tag given by the kernel. The
   kernel might be somewhat backwards compatible, but don't bet on
   it. */

/* XXX - Note, cap_t, is defined by POSIX to be an "opaque" pointer to
   a set of three capability sets.  The transposition of 3*the
   following structure to such a composite is better handled in a user
   library since the draft standard requires the use of malloc/free
   etc.. */
 
#define _LINUX_CAPABILITY_VERSION  0x19980330

typedef struct __user_cap_header_struct {
	__u32 version;
	int pid;
} __user *cap_user_header_t;
 
typedef struct __user_cap_data_struct {
        __u32 effective;
        __u32 permitted;
        __u32 inheritable;
} __user *cap_user_data_t;
  
#ifdef __KERNEL__

#include <linux/spinlock.h>
#include <asm/current.h>

/* #define STRICT_CAP_T_TYPECHECKS */

#ifdef STRICT_CAP_T_TYPECHECKS

typedef struct kernel_cap_struct {
	__u32 cap;
} kernel_cap_t;

#else

typedef __u32 kernel_cap_t;

#endif
  
#define _USER_CAP_HEADER_SIZE  (2*sizeof(__u32))
#define _KERNEL_CAP_T_SIZE     (sizeof(kernel_cap_t))

#endif


/**
 ** POSIX-draft defined capabilities. 
 **/

/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
   overrides the restriction of changing file ownership and group
   ownership. */

#define CAP_CHOWN            0

/* Override all DAC access, including ACL execute access if
   [_POSIX_ACL] is defined. Excluding DAC access covered by
   CAP_LINUX_IMMUTABLE. */

#define CAP_DAC_OVERRIDE     1

/* Overrides all DAC restrictions regarding read and search on files
   and directories, including ACL restrictions if [_POSIX_ACL] is
   defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */

#define CAP_DAC_READ_SEARCH  2
    
/* Overrides all restrictions about allowed operations on files, where
   file owner ID must be equal to the user ID, except where CAP_FSETID
   is applicable. It doesn't override MAC and DAC restrictions. */

#define CAP_FOWNER           3

/* Overrides the following restrictions that the effective user ID
   shall match the file owner ID when setting the S_ISUID and S_ISGID
   bits on that file; that the effective group ID (or one of the
   supplementary group IDs) shall match the file owner ID when setting
   the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
   cleared on successful return from chown(2) (not implemented). */

#define CAP_FSETID           4

/* Used to decide between falling back on the old suser() or fsuser(). */

#define CAP_FS_MASK          0x1f

/* Overrides the restriction that the real or effective user ID of a
   process sending a signal must match the real or effective user ID
   of the process receiving the signal. */

#define CAP_KILL             5

/* Allows setgid(2) manipulation */
/* Allows setgroups(2) */
/* Allows forged gids on socket credentials passing. */

#define CAP_SETGID           6

/* Allows set*uid(2) manipulation (including fsuid). */
/* Allows forged pids on socket credentials passing. */

#define CAP_SETUID           7


/**
 ** Linux-specific capabilities
 **/

/* Transfer any capability in your permitted set to any pid,
   remove any capability in your permitted set from any pid */

#define CAP_SETPCAP          8

/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */

#define CAP_LINUX_IMMUTABLE  9

/* Allows binding to TCP/UDP sockets below 1024 */
/* Allows binding to ATM VCIs below 32 */

#define CAP_NET_BIND_SERVICE 10

/* Allow broadcasting, listen to multicast */

#define CAP_NET_BROADCAST    11

/* Allow interface configuration */
/* Allow administration of IP firewall, masquerading and accounting */
/* Allow setting debug option on sockets */
/* Allow modification of routing tables */
/* Allow setting arbitrary process / process group ownership on
   sockets */
/* Allow binding to any address for transparent proxying */
/* Allow setting TOS (type of service) */
/* Allow setting promiscuous mode */
/* Allow clearing driver statistics */
/* Allow multicasting */
/* Allow read/write of device-specific registers */
/* Allow activation of ATM control sockets */

#define CAP_NET_ADMIN        12

/* Allow use of RAW sockets */
/* Allow use of PACKET sockets */

#define CAP_NET_RAW          13

/* Allow locking of shared memory segments */
/* Allow mlock and mlockall (which doesn't really have anything to do
   with IPC) */

#define CAP_IPC_LOCK         14

/* Override IPC ownership checks */

#define CAP_IPC_OWNER        15

/* Insert and remove kernel modules - modify kernel without limit */
/* Modify cap_bset */
#define CAP_SYS_MODULE       16

/* Allow ioperm/iopl access */
/* Allow sending USB messages to any device via /proc/bus/usb */

#define CAP_SYS_RAWIO        17

/* Allow use of chroot() */

#define CAP_SYS_CHROOT       18

/* Allow ptrace() of any process */

#define CAP_SYS_PTRACE       19

/* Allow configuration of process accounting */

#define CAP_SYS_PACCT        20

/* Allow configuration of the secure attention key */
/* Allow administration of the random device */
/* Allow examination and configuration of disk quotas */
/* Allow configuring the kernel's syslog (printk behaviour) */
/* Allow setting the domainname */
/* Allow setting the hostname */
/* Allow calling bdflush() */
/* Allow mount() and umount(), setting up new smb connection */
/* Allow some autofs root ioctls */
/* Allow nfsservctl */
/* Allow VM86_REQUEST_IRQ */
/* Allow to read/write pci config on alpha */
/* Allow irix_prctl on mips (setstacksize) */
/* Allow flushing all cache on m68k (sys_cacheflush) */
/* Allow removing semaphores */
/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
   and shared memory */
/* Allow locking/unlocking of shared memory segment */
/* Allow turning swap on/off */
/* Allow forged pids on socket credentials passing */
/* Allow setting readahead and flushing buffers on block devices */
/* Allow setting geometry in floppy driver */
/* Allow turning DMA on/off in xd driver */
/* Allow administration of md devices (mostly the above, but some
   extra ioctls) */
/* Allow tuning the ide driver */
/* Allow access to the nvram device */
/* Allow administration of apm_bios, serial and bttv (TV) device */
/* Allow manufacturer commands in isdn CAPI support driver */
/* Allow reading non-standardized portions of pci configuration space */
/* Allow DDI debug ioctl on sbpcd driver */
/* Allow setting up serial ports */
/* Allow sending raw qic-117 commands */
/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
   arbitrary SCSI commands */
/* Allow setting encryption key on loopback filesystem */
/* Allow setting zone reclaim policy */

#define CAP_SYS_ADMIN        21

/* Allow use of reboot() */

#define CAP_SYS_BOOT         22

/* Allow raising priority and setting priority on other (different
   UID) processes */
/* Allow use of FIFO and round-robin (realtime) scheduling on own
   processes and setting the scheduling algorithm used by another
   process. */
/* Allow setting cpu affinity on other processes */

#define CAP_SYS_NICE         23

/* Override resource limits. Set resource limits. */
/* Override quota limits. */
/* Override reserved space on ext2 filesystem */
/* Modify data journaling mode on ext3 filesystem (uses journaling
   resources) */
/* NOTE: ext2 honors fsuid when checking for resource overrides, so 
   you can override using fsuid too */
/* Override size restrictions on IPC message queues */
/* Allow more than 64hz interrupts from the real-time clock */
/* Override max number of consoles on console allocation */
/* Override max number of keymaps */

#define CAP_SYS_RESOURCE     24

/* Allow manipulation of system clock */
/* Allow irix_stime on mips */
/* Allow setting the real-time clock */

#define CAP_SYS_TIME         25

/* Allow configuration of tty devices */
/* Allow vhangup() of tty */

#define CAP_SYS_TTY_CONFIG   26

/* Allow the privileged aspects of mknod() */

#define CAP_MKNOD            27

/* Allow taking of leases on files */

#define CAP_LEASE            28

#define CAP_AUDIT_WRITE      29

#define CAP_AUDIT_CONTROL    30

#ifdef __KERNEL__
/* 
 * Bounding set
 */
extern kernel_cap_t cap_bset;

/*
 * Internal kernel functions only
 */
 
#ifdef STRICT_CAP_T_TYPECHECKS

#define to_cap_t(x) { x }
#define cap_t(x) (x).cap

#else

#define to_cap_t(x) (x)
#define cap_t(x) (x)

#endif

#define CAP_EMPTY_SET       to_cap_t(0)
#define CAP_FULL_SET        to_cap_t(~0)
#define CAP_INIT_EFF_SET    to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP))
#define CAP_INIT_INH_SET    to_cap_t(0)

#define CAP_TO_MASK(x) (1 << (x))
#define cap_raise(c, flag)   (cap_t(c) |=  CAP_TO_MASK(flag))
#define cap_lower(c, flag)   (cap_t(c) &= ~CAP_TO_MASK(flag))
#define cap_raised(c, flag)  (cap_t(c) & CAP_TO_MASK(flag))

static inline kernel_cap_t cap_combine(kernel_cap_t a, kernel_cap_t b)
{
     kernel_cap_t dest;
     cap_t(dest) = cap_t(a) | cap_t(b);
     return dest;
}

static inline kernel_cap_t cap_intersect(kernel_cap_t a, kernel_cap_t b)
{
     kernel_cap_t dest;
     cap_t(dest) = cap_t(a) & cap_t(b);
     return dest;
}

static inline kernel_cap_t cap_drop(kernel_cap_t a, kernel_cap_t drop)
{
     kernel_cap_t dest;
     cap_t(dest) = cap_t(a) & ~cap_t(drop);
     return dest;
}

static inline kernel_cap_t cap_invert(kernel_cap_t c)
{
     kernel_cap_t dest;
     cap_t(dest) = ~cap_t(c);
     return dest;
}

#define cap_isclear(c)       (!cap_t(c))
#define cap_issubset(a,set)  (!(cap_t(a) & ~cap_t(set)))

#define cap_clear(c)         do { cap_t(c) =  0; } while(0)
#define cap_set_full(c)      do { cap_t(c) = ~0; } while(0)
#define cap_mask(c,mask)     do { cap_t(c) &= cap_t(mask); } while(0)

#define cap_is_fs_cap(c)     (CAP_TO_MASK(c) & CAP_FS_MASK)

extern int capable(int cap);

#endif /* __KERNEL__ */

#endif /* !_LINUX_CAPABILITY_H */
Commit	Line	Data
1da177e4 LT	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>
c59ede7b	46	#include <asm/current.h>
1da177e4 LT	47
	48	/* #define STRICT_CAP_T_TYPECHECKS */
	49
	50	#ifdef STRICT_CAP_T_TYPECHECKS
	51
	52	typedef struct kernel_cap_struct {
	53	__u32 cap;
	54	} kernel_cap_t;
	55
	56	#else
	57
	58	typedef __u32 kernel_cap_t;
	59
	60	#endif
	61
	62	#define _USER_CAP_HEADER_SIZE (2*sizeof(__u32))
	63	#define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t))
	64
	65	#endif
	66
	67
	68	/**
	69	** POSIX-draft defined capabilities.
	70	**/
	71
	72	/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
	73	overrides the restriction of changing file ownership and group
	74	ownership. */
	75
	76	#define CAP_CHOWN 0
	77
	78	/* Override all DAC access, including ACL execute access if
	79	[_POSIX_ACL] is defined. Excluding DAC access covered by
	80	CAP_LINUX_IMMUTABLE. */
	81
	82	#define CAP_DAC_OVERRIDE 1
	83
	84	/* Overrides all DAC restrictions regarding read and search on files
	85	and directories, including ACL restrictions if [_POSIX_ACL] is
	86	defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
	87
	88	#define CAP_DAC_READ_SEARCH 2
	89
	90	/* Overrides all restrictions about allowed operations on files, where
	91	file owner ID must be equal to the user ID, except where CAP_FSETID
	92	is applicable. It doesn't override MAC and DAC restrictions. */
	93
	94	#define CAP_FOWNER 3
	95
	96	/* Overrides the following restrictions that the effective user ID
	97	shall match the file owner ID when setting the S_ISUID and S_ISGID
	98	bits on that file; that the effective group ID (or one of the
	99	supplementary group IDs) shall match the file owner ID when setting
	100	the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
	101	cleared on successful return from chown(2) (not implemented). */
	102
	103	#define CAP_FSETID 4
	104
	105	/* Used to decide between falling back on the old suser() or fsuser(). */
	106
	107	#define CAP_FS_MASK 0x1f
	108
	109	/* Overrides the restriction that the real or effective user ID of a
	110	process sending a signal must match the real or effective user ID
111	of the process receiving the signal. */
112
113	#define CAP_KILL 5
114
115	/* Allows setgid(2) manipulation */
116	/* Allows setgroups(2) */
117	/* Allows forged gids on socket credentials passing. */
118
119	#define CAP_SETGID 6
120
121	/* Allows setuid(2) manipulation (including fsuid). /
122	/* Allows forged pids on socket credentials passing. */
123
124	#define CAP_SETUID 7
125
126
127	/**
128	** Linux-specific capabilities
129	**/
130
131	/* Transfer any capability in your permitted set to any pid,
132	remove any capability in your permitted set from any pid */
133
134	#define CAP_SETPCAP 8
135
136	/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
137
138	#define CAP_LINUX_IMMUTABLE 9
139
140	/* Allows binding to TCP/UDP sockets below 1024 */
141	/* Allows binding to ATM VCIs below 32 */
142
143	#define CAP_NET_BIND_SERVICE 10
144
145	/* Allow broadcasting, listen to multicast */
146
147	#define CAP_NET_BROADCAST 11
148
149	/* Allow interface configuration */
150	/* Allow administration of IP firewall, masquerading and accounting */
151	/* Allow setting debug option on sockets */
152	/* Allow modification of routing tables */
153	/* Allow setting arbitrary process / process group ownership on
154	sockets */
155	/* Allow binding to any address for transparent proxying */
156	/* Allow setting TOS (type of service) */
157	/* Allow setting promiscuous mode */
158	/* Allow clearing driver statistics */
159	/* Allow multicasting */
160	/* Allow read/write of device-specific registers */
161	/* Allow activation of ATM control sockets */
162
163	#define CAP_NET_ADMIN 12
164
165	/* Allow use of RAW sockets */
166	/* Allow use of PACKET sockets */
167
168	#define CAP_NET_RAW 13
169
170	/* Allow locking of shared memory segments */
171	/* Allow mlock and mlockall (which doesn't really have anything to do
172	with IPC) */
173
174	#define CAP_IPC_LOCK 14
175
176	/* Override IPC ownership checks */
177
178	#define CAP_IPC_OWNER 15
179
180	/* Insert and remove kernel modules - modify kernel without limit */
181	/* Modify cap_bset */
182	#define CAP_SYS_MODULE 16
183
184	/* Allow ioperm/iopl access */
185	/* Allow sending USB messages to any device via /proc/bus/usb */
186
187	#define CAP_SYS_RAWIO 17
188
189	/* Allow use of chroot() */
190
191	#define CAP_SYS_CHROOT 18
192
193	/* Allow ptrace() of any process */
194
195	#define CAP_SYS_PTRACE 19
196
197	/* Allow configuration of process accounting */
198
199	#define CAP_SYS_PACCT 20
200
201	/* Allow configuration of the secure attention key */
202	/* Allow administration of the random device */
203	/* Allow examination and configuration of disk quotas */
204	/* Allow configuring the kernel's syslog (printk behaviour) */
205	/* Allow setting the domainname */
206	/* Allow setting the hostname */
207	/* Allow calling bdflush() */
208	/* Allow mount() and umount(), setting up new smb connection */
209	/* Allow some autofs root ioctls */
210	/* Allow nfsservctl */
211	/* Allow VM86_REQUEST_IRQ */
212	/* Allow to read/write pci config on alpha */
213	/* Allow irix_prctl on mips (setstacksize) */
214	/* Allow flushing all cache on m68k (sys_cacheflush) */
215	/* Allow removing semaphores */
216	/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
217	and shared memory */
218	/* Allow locking/unlocking of shared memory segment */
219	/* Allow turning swap on/off */
220	/* Allow forged pids on socket credentials passing */
221	/* Allow setting readahead and flushing buffers on block devices */
222	/* Allow setting geometry in floppy driver */
223	/* Allow turning DMA on/off in xd driver */
224	/* Allow administration of md devices (mostly the above, but some
225	extra ioctls) */
226	/* Allow tuning the ide driver */
227	/* Allow access to the nvram device */
228	/* Allow administration of apm_bios, serial and bttv (TV) device */
229	/* Allow manufacturer commands in isdn CAPI support driver */
230	/* Allow reading non-standardized portions of pci configuration space */
231	/* Allow DDI debug ioctl on sbpcd driver */
232	/* Allow setting up serial ports */
233	/* Allow sending raw qic-117 commands */
234	/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
235	arbitrary SCSI commands */
236	/* Allow setting encryption key on loopback filesystem */
bce5f6ba	237	/* Allow setting zone reclaim policy */
1da177e4 LT	238
	239	#define CAP_SYS_ADMIN 21
	240
	241	/* Allow use of reboot() */
	242
	243	#define CAP_SYS_BOOT 22
	244
	245	/* Allow raising priority and setting priority on other (different
	246	UID) processes */
	247	/* Allow use of FIFO and round-robin (realtime) scheduling on own
	248	processes and setting the scheduling algorithm used by another
	249	process. */
	250	/* Allow setting cpu affinity on other processes */
	251
	252	#define CAP_SYS_NICE 23
	253
	254	/* Override resource limits. Set resource limits. */
	255	/* Override quota limits. */
	256	/* Override reserved space on ext2 filesystem */
	257	/* Modify data journaling mode on ext3 filesystem (uses journaling
	258	resources) */
	259	/* NOTE: ext2 honors fsuid when checking for resource overrides, so
	260	you can override using fsuid too */
	261	/* Override size restrictions on IPC message queues */
	262	/* Allow more than 64hz interrupts from the real-time clock */
	263	/* Override max number of consoles on console allocation */
	264	/* Override max number of keymaps */
	265
	266	#define CAP_SYS_RESOURCE 24
	267
	268	/* Allow manipulation of system clock */
	269	/* Allow irix_stime on mips */
	270	/* Allow setting the real-time clock */
	271
	272	#define CAP_SYS_TIME 25
	273
	274	/* Allow configuration of tty devices */
	275	/* Allow vhangup() of tty */
	276
	277	#define CAP_SYS_TTY_CONFIG 26
	278
	279	/* Allow the privileged aspects of mknod() */
	280
	281	#define CAP_MKNOD 27
	282
	283	/* Allow taking of leases on files */
	284
	285	#define CAP_LEASE 28
	286
	287	#define CAP_AUDIT_WRITE 29
	288
	289	#define CAP_AUDIT_CONTROL 30
	290
	291	#ifdef __KERNEL__
	292	/*
	293	* Bounding set
	294	*/
	295	extern kernel_cap_t cap_bset;
	296
	297	/*
	298	* Internal kernel functions only
	299	*/
	300
	301	#ifdef STRICT_CAP_T_TYPECHECKS
302
303	#define to_cap_t(x) { x }
304	#define cap_t(x) (x).cap
305
306	#else
307
308	#define to_cap_t(x) (x)
309	#define cap_t(x) (x)
310
311	#endif
312
313	#define CAP_EMPTY_SET to_cap_t(0)
314	#define CAP_FULL_SET to_cap_t(~0)
315	#define CAP_INIT_EFF_SET to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP))
316	#define CAP_INIT_INH_SET to_cap_t(0)
317
318	#define CAP_TO_MASK(x) (1 << (x))
319	#define cap_raise(c, flag) (cap_t(c) \|= CAP_TO_MASK(flag))
320	#define cap_lower(c, flag) (cap_t(c) &= ~CAP_TO_MASK(flag))
321	#define cap_raised(c, flag) (cap_t(c) & CAP_TO_MASK(flag))
322
323	static inline kernel_cap_t cap_combine(kernel_cap_t a, kernel_cap_t b)
324	{
325	kernel_cap_t dest;
326	cap_t(dest) = cap_t(a) \| cap_t(b);
327	return dest;
328	}
329
330	static inline kernel_cap_t cap_intersect(kernel_cap_t a, kernel_cap_t b)
331	{
332	kernel_cap_t dest;
333	cap_t(dest) = cap_t(a) & cap_t(b);
334	return dest;
335	}
336
337	static inline kernel_cap_t cap_drop(kernel_cap_t a, kernel_cap_t drop)
338	{
339	kernel_cap_t dest;
340	cap_t(dest) = cap_t(a) & ~cap_t(drop);
341	return dest;
342	}
343
344	static inline kernel_cap_t cap_invert(kernel_cap_t c)
345	{
346	kernel_cap_t dest;
347	cap_t(dest) = ~cap_t(c);
348	return dest;
349	}
350
351	#define cap_isclear(c) (!cap_t(c))
352	#define cap_issubset(a,set) (!(cap_t(a) & ~cap_t(set)))
353
354	#define cap_clear(c) do { cap_t(c) = 0; } while(0)
355	#define cap_set_full(c) do { cap_t(c) = ~0; } while(0)
356	#define cap_mask(c,mask) do { cap_t(c) &= cap_t(mask); } while(0)
357
358	#define cap_is_fs_cap(c) (CAP_TO_MASK(c) & CAP_FS_MASK)
359
c59ede7b RD	360	extern int capable(int cap);
c59ede7b RD	361
1da177e4 LT	362	#endif /* __KERNEL__ */
	363
	364	#endif /* !_LINUX_CAPABILITY_H */