[mirror_ubuntu-zesty-kernel.git] / include / linux / capability.h

/*
 * This is <linux/capability.h>
 *
 * Andrew G. Morgan <morgan@kernel.org>
 * 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-2.6/
 */

#ifndef _LINUX_CAPABILITY_H
#define _LINUX_CAPABILITY_H

#include <linux/types.h>

struct task_struct;

/* 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. */

/* Note, cap_t, is defined by POSIX (draft) 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_1  0x19980330
#define _LINUX_CAPABILITY_U32S_1     1

#define _LINUX_CAPABILITY_VERSION_2  0x20071026
#define _LINUX_CAPABILITY_U32S_2     2

#define _LINUX_CAPABILITY_VERSION    _LINUX_CAPABILITY_VERSION_2
#define _LINUX_CAPABILITY_U32S       _LINUX_CAPABILITY_U32S_2

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;


#define XATTR_CAPS_SUFFIX "capability"
#define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX

#define VFS_CAP_REVISION_MASK	0xFF000000
#define VFS_CAP_FLAGS_MASK	~VFS_CAP_REVISION_MASK
#define VFS_CAP_FLAGS_EFFECTIVE	0x000001

#define VFS_CAP_REVISION_1	0x01000000
#define VFS_CAP_U32_1           1
#define XATTR_CAPS_SZ_1         (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1))

#define VFS_CAP_REVISION_2	0x02000000
#define VFS_CAP_U32_2           2
#define XATTR_CAPS_SZ_2         (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2))

#define XATTR_CAPS_SZ           XATTR_CAPS_SZ_2
#define VFS_CAP_U32             VFS_CAP_U32_2
#define VFS_CAP_REVISION	VFS_CAP_REVISION_2


struct vfs_cap_data {
	__le32 magic_etc;            /* Little endian */
	struct {
		__le32 permitted;    /* Little endian */
		__le32 inheritable;  /* Little endian */
	} data[VFS_CAP_U32];
};

#ifdef __KERNEL__

typedef struct kernel_cap_struct {
	__u32 cap[_LINUX_CAPABILITY_U32S];
} kernel_cap_t;

#define _USER_CAP_HEADER_SIZE  (sizeof(struct __user_cap_header_struct))
#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

/* 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
 **/

/* Without VFS support for capabilities:
 *   Transfer any capability in your permitted set to any pid,
 *   remove any capability in your permitted set from any pid
 * With VFS support for capabilities (neither of above, but)
 *   Add any capability to the current process' inheritable set
 */

#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

#define CAP_SETFCAP	     31

/*
 * Bit location of each capability (used by user-space library and kernel)
 */

#define CAP_TO_INDEX(x)     ((x) >> 5)        /* 1 << 5 == bits in __u32 */
#define CAP_TO_MASK(x)      (1 << ((x) & 31)) /* mask for indexed __u32 */

#ifdef __KERNEL__

/*
 * Internal kernel functions only
 */

#define CAP_FOR_EACH_U32(__capi)  \
	for (__capi = 0; __capi < _LINUX_CAPABILITY_U32S; ++__capi)

# define CAP_FS_MASK_B0     (CAP_TO_MASK(CAP_CHOWN)		\
			    | CAP_TO_MASK(CAP_DAC_OVERRIDE)	\
			    | CAP_TO_MASK(CAP_DAC_READ_SEARCH)	\
			    | CAP_TO_MASK(CAP_FOWNER)		\
			    | CAP_TO_MASK(CAP_FSETID))

#if _LINUX_CAPABILITY_U32S != 2
# error Fix up hand-coded capability macro initializers
#else /* HAND-CODED capability initializers */

# define CAP_EMPTY_SET    {{ 0, 0 }}
# define CAP_FULL_SET     {{ ~0, ~0 }}
# define CAP_INIT_EFF_SET {{ ~CAP_TO_MASK(CAP_SETPCAP), ~0 }}
# define CAP_FS_SET       {{ CAP_FS_MASK_B0, 0 }}
# define CAP_NFSD_SET     {{ CAP_FS_MASK_B0|CAP_TO_MASK(CAP_SYS_RESOURCE), 0 }}

#endif /* _LINUX_CAPABILITY_U32S != 2 */

#define CAP_INIT_INH_SET    CAP_EMPTY_SET

# define cap_clear(c)         do { (c) = __cap_empty_set; } while (0)
# define cap_set_full(c)      do { (c) = __cap_full_set; } while (0)
# define cap_set_init_eff(c)  do { (c) = __cap_init_eff_set; } while (0)

#define cap_raise(c, flag)  ((c).cap[CAP_TO_INDEX(flag)] |= CAP_TO_MASK(flag))
#define cap_lower(c, flag)  ((c).cap[CAP_TO_INDEX(flag)] &= ~CAP_TO_MASK(flag))
#define cap_raised(c, flag) ((c).cap[CAP_TO_INDEX(flag)] & CAP_TO_MASK(flag))

#define CAP_BOP_ALL(c, a, b, OP)                                    \
do {                                                                \
	unsigned __capi;                                            \
	CAP_FOR_EACH_U32(__capi) {                                  \
		c.cap[__capi] = a.cap[__capi] OP b.cap[__capi];     \
	}                                                           \
} while (0)

#define CAP_UOP_ALL(c, a, OP)                                       \
do {                                                                \
	unsigned __capi;                                            \
	CAP_FOR_EACH_U32(__capi) {                                  \
		c.cap[__capi] = OP a.cap[__capi];                   \
	}                                                           \
} while (0)

static inline kernel_cap_t cap_combine(const kernel_cap_t a,
				       const kernel_cap_t b)
{
	kernel_cap_t dest;
	CAP_BOP_ALL(dest, a, b, |);
	return dest;
}

static inline kernel_cap_t cap_intersect(const kernel_cap_t a,
					 const kernel_cap_t b)
{
	kernel_cap_t dest;
	CAP_BOP_ALL(dest, a, b, &);
	return dest;
}

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

static inline kernel_cap_t cap_invert(const kernel_cap_t c)
{
	kernel_cap_t dest;
	CAP_UOP_ALL(dest, c, ~);
	return dest;
}

static inline int cap_isclear(const kernel_cap_t a)
{
	unsigned __capi;
	CAP_FOR_EACH_U32(__capi) {
		if (a.cap[__capi] != 0)
			return 0;
	}
	return 1;
}

static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set)
{
	kernel_cap_t dest;
	dest = cap_drop(a, set);
	return cap_isclear(dest);
}

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

static inline int cap_is_fs_cap(int cap)
{
	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
	return !!(CAP_TO_MASK(cap) & __cap_fs_set.cap[CAP_TO_INDEX(cap)]);
}

static inline kernel_cap_t cap_drop_fs_set(const kernel_cap_t a)
{
	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
	return cap_drop(a, __cap_fs_set);
}

static inline kernel_cap_t cap_raise_fs_set(const kernel_cap_t a,
					    const kernel_cap_t permitted)
{
	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
	return cap_combine(a,
			   cap_intersect(permitted, __cap_fs_set));
}

static inline kernel_cap_t cap_drop_nfsd_set(const kernel_cap_t a)
{
	const kernel_cap_t __cap_fs_set = CAP_NFSD_SET;
	return cap_drop(a, __cap_fs_set);
}

static inline kernel_cap_t cap_raise_nfsd_set(const kernel_cap_t a,
					      const kernel_cap_t permitted)
{
	const kernel_cap_t __cap_nfsd_set = CAP_NFSD_SET;
	return cap_combine(a,
			   cap_intersect(permitted, __cap_nfsd_set));
}

extern const kernel_cap_t __cap_empty_set;
extern const kernel_cap_t __cap_full_set;
extern const kernel_cap_t __cap_init_eff_set;

int capable(int cap);
int __capable(struct task_struct *t, int cap);

#endif /* __KERNEL__ */

#endif /* !_LINUX_CAPABILITY_H */
Commit	Line	Data
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/
b5376771 SH	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;
b7add02d AM	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
	34	#define _LINUX_CAPABILITY_VERSION_2 0x20071026
	35	#define _LINUX_CAPABILITY_U32S_2 2
	36
	37	#define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_2
	38	#define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_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
e338d263 AM	61	#define XATTR_CAPS_SZ_1 (sizeof(__le32)(1 + 2VFS_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 + 2VFS_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
b5376771 SH	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
	80	#ifdef __KERNEL__
1da177e4	81
1da177e4	82	typedef struct kernel_cap_struct {
e338d263	83	__u32 cap[_LINUX_CAPABILITY_U32S];
1da177e4 LT	84	} kernel_cap_t;
1da177e4 LT	85
e338d263	86	#define _USER_CAP_HEADER_SIZE (sizeof(struct __user_cap_header_struct))
1da177e4 LT	87	#define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t))
	88
	89	#endif
	90
	91
	92	/**
b5376771	93	** POSIX-draft defined capabilities.
1da177e4 LT	94	**/
	95
	96	/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
	97	overrides the restriction of changing file ownership and group
	98	ownership. */
	99
	100	#define CAP_CHOWN 0
	101
	102	/* Override all DAC access, including ACL execute access if
	103	[_POSIX_ACL] is defined. Excluding DAC access covered by
	104	CAP_LINUX_IMMUTABLE. */
	105
	106	#define CAP_DAC_OVERRIDE 1
	107
	108	/* Overrides all DAC restrictions regarding read and search on files
	109	and directories, including ACL restrictions if [_POSIX_ACL] is
	110	defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
	111
	112	#define CAP_DAC_READ_SEARCH 2
b5376771	113
1da177e4 LT	114	/* Overrides all restrictions about allowed operations on files, where
	115	file owner ID must be equal to the user ID, except where CAP_FSETID
	116	is applicable. It doesn't override MAC and DAC restrictions. */
	117
	118	#define CAP_FOWNER 3
	119
	120	/* Overrides the following restrictions that the effective user ID
	121	shall match the file owner ID when setting the S_ISUID and S_ISGID
	122	bits on that file; that the effective group ID (or one of the
	123	supplementary group IDs) shall match the file owner ID when setting
	124	the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
	125	cleared on successful return from chown(2) (not implemented). */
	126
	127	#define CAP_FSETID 4
	128
1da177e4 LT	129	/* Overrides the restriction that the real or effective user ID of a
	130	process sending a signal must match the real or effective user ID
	131	of the process receiving the signal. */
	132
	133	#define CAP_KILL 5
	134
	135	/* Allows setgid(2) manipulation */
	136	/* Allows setgroups(2) */
	137	/* Allows forged gids on socket credentials passing. */
	138
	139	#define CAP_SETGID 6
	140
	141	/* Allows setuid(2) manipulation (including fsuid). /
	142	/* Allows forged pids on socket credentials passing. */
	143
	144	#define CAP_SETUID 7
	145
	146
	147	/**
	148	** Linux-specific capabilities
	149	**/
	150
e338d263 AM	151	/* Without VFS support for capabilities:
	152	* Transfer any capability in your permitted set to any pid,
	153	* remove any capability in your permitted set from any pid
	154	* With VFS support for capabilities (neither of above, but)
	155	* Add any capability to the current process' inheritable set
	156	*/
1da177e4 LT	157
	158	#define CAP_SETPCAP 8
	159
	160	/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
	161
	162	#define CAP_LINUX_IMMUTABLE 9
	163
	164	/* Allows binding to TCP/UDP sockets below 1024 */
	165	/* Allows binding to ATM VCIs below 32 */
	166
	167	#define CAP_NET_BIND_SERVICE 10
	168
	169	/* Allow broadcasting, listen to multicast */
	170
	171	#define CAP_NET_BROADCAST 11
	172
	173	/* Allow interface configuration */
	174	/* Allow administration of IP firewall, masquerading and accounting */
	175	/* Allow setting debug option on sockets */
	176	/* Allow modification of routing tables */
	177	/* Allow setting arbitrary process / process group ownership on
	178	sockets */
	179	/* Allow binding to any address for transparent proxying */
	180	/* Allow setting TOS (type of service) */
	181	/* Allow setting promiscuous mode */
	182	/* Allow clearing driver statistics */
	183	/* Allow multicasting */
	184	/* Allow read/write of device-specific registers */
	185	/* Allow activation of ATM control sockets */
	186
	187	#define CAP_NET_ADMIN 12
	188
	189	/* Allow use of RAW sockets */
	190	/* Allow use of PACKET sockets */
	191
	192	#define CAP_NET_RAW 13
	193
	194	/* Allow locking of shared memory segments */
	195	/* Allow mlock and mlockall (which doesn't really have anything to do
	196	with IPC) */
	197
	198	#define CAP_IPC_LOCK 14
	199
	200	/* Override IPC ownership checks */
	201
	202	#define CAP_IPC_OWNER 15
	203
	204	/* Insert and remove kernel modules - modify kernel without limit */
	205	/* Modify cap_bset */
	206	#define CAP_SYS_MODULE 16
	207
	208	/* Allow ioperm/iopl access */
	209	/* Allow sending USB messages to any device via /proc/bus/usb */
	210
	211	#define CAP_SYS_RAWIO 17
	212
	213	/* Allow use of chroot() */
	214
	215	#define CAP_SYS_CHROOT 18
	216
	217	/* Allow ptrace() of any process */
	218
	219	#define CAP_SYS_PTRACE 19
	220
221	/* Allow configuration of process accounting */
222
223	#define CAP_SYS_PACCT 20
224
225	/* Allow configuration of the secure attention key */
226	/* Allow administration of the random device */
227	/* Allow examination and configuration of disk quotas */
228	/* Allow configuring the kernel's syslog (printk behaviour) */
229	/* Allow setting the domainname */
230	/* Allow setting the hostname */
231	/* Allow calling bdflush() */
232	/* Allow mount() and umount(), setting up new smb connection */
233	/* Allow some autofs root ioctls */
234	/* Allow nfsservctl */
235	/* Allow VM86_REQUEST_IRQ */
236	/* Allow to read/write pci config on alpha */
237	/* Allow irix_prctl on mips (setstacksize) */
238	/* Allow flushing all cache on m68k (sys_cacheflush) */
239	/* Allow removing semaphores */
240	/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
241	and shared memory */
242	/* Allow locking/unlocking of shared memory segment */
243	/* Allow turning swap on/off */
244	/* Allow forged pids on socket credentials passing */
245	/* Allow setting readahead and flushing buffers on block devices */
246	/* Allow setting geometry in floppy driver */
247	/* Allow turning DMA on/off in xd driver */
248	/* Allow administration of md devices (mostly the above, but some
249	extra ioctls) */
250	/* Allow tuning the ide driver */
251	/* Allow access to the nvram device */
252	/* Allow administration of apm_bios, serial and bttv (TV) device */
253	/* Allow manufacturer commands in isdn CAPI support driver */
254	/* Allow reading non-standardized portions of pci configuration space */
255	/* Allow DDI debug ioctl on sbpcd driver */
256	/* Allow setting up serial ports */
257	/* Allow sending raw qic-117 commands */
258	/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
259	arbitrary SCSI commands */
260	/* Allow setting encryption key on loopback filesystem */
bce5f6ba	261	/* Allow setting zone reclaim policy */
1da177e4 LT	262
	263	#define CAP_SYS_ADMIN 21
	264
	265	/* Allow use of reboot() */
	266
	267	#define CAP_SYS_BOOT 22
	268
	269	/* Allow raising priority and setting priority on other (different
	270	UID) processes */
	271	/* Allow use of FIFO and round-robin (realtime) scheduling on own
	272	processes and setting the scheduling algorithm used by another
	273	process. */
	274	/* Allow setting cpu affinity on other processes */
	275
	276	#define CAP_SYS_NICE 23
	277
	278	/* Override resource limits. Set resource limits. */
	279	/* Override quota limits. */
	280	/* Override reserved space on ext2 filesystem */
	281	/* Modify data journaling mode on ext3 filesystem (uses journaling
	282	resources) */
b5376771	283	/* NOTE: ext2 honors fsuid when checking for resource overrides, so
1da177e4 LT	284	you can override using fsuid too */
	285	/* Override size restrictions on IPC message queues */
	286	/* Allow more than 64hz interrupts from the real-time clock */
	287	/* Override max number of consoles on console allocation */
	288	/* Override max number of keymaps */
	289
	290	#define CAP_SYS_RESOURCE 24
	291
	292	/* Allow manipulation of system clock */
	293	/* Allow irix_stime on mips */
	294	/* Allow setting the real-time clock */
	295
	296	#define CAP_SYS_TIME 25
	297
	298	/* Allow configuration of tty devices */
	299	/* Allow vhangup() of tty */
	300
	301	#define CAP_SYS_TTY_CONFIG 26
	302
	303	/* Allow the privileged aspects of mknod() */
	304
	305	#define CAP_MKNOD 27
	306
	307	/* Allow taking of leases on files */
	308
	309	#define CAP_LEASE 28
	310
	311	#define CAP_AUDIT_WRITE 29
	312
	313	#define CAP_AUDIT_CONTROL 30
	314
b5376771 SH	315	#define CAP_SETFCAP 31
b5376771 SH	316
e338d263 AM	317	/*
	318	* Bit location of each capability (used by user-space library and kernel)
	319	*/
	320
	321	#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
	322	#define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */
	323
1da177e4	324	#ifdef __KERNEL__
1da177e4 LT	325
	326	/*
	327	* Internal kernel functions only
	328	*/
b5376771	329
e338d263 AM	330	#define CAP_FOR_EACH_U32(__capi) \
	331	for (__capi = 0; __capi < _LINUX_CAPABILITY_U32S; ++__capi)
	332
	333	# define CAP_FS_MASK_B0 (CAP_TO_MASK(CAP_CHOWN) \
	334	\| CAP_TO_MASK(CAP_DAC_OVERRIDE) \
	335	\| CAP_TO_MASK(CAP_DAC_READ_SEARCH) \
	336	\| CAP_TO_MASK(CAP_FOWNER) \
	337	\| CAP_TO_MASK(CAP_FSETID))
	338
	339	#if _LINUX_CAPABILITY_U32S != 2
	340	# error Fix up hand-coded capability macro initializers
	341	#else /* HAND-CODED capability initializers */
	342
	343	# define CAP_EMPTY_SET {{ 0, 0 }}
	344	# define CAP_FULL_SET {{ ~0, ~0 }}
	345	# define CAP_INIT_EFF_SET {{ ~CAP_TO_MASK(CAP_SETPCAP), ~0 }}
	346	# define CAP_FS_SET {{ CAP_FS_MASK_B0, 0 }}
	347	# define CAP_NFSD_SET {{ CAP_FS_MASK_B0\|CAP_TO_MASK(CAP_SYS_RESOURCE), 0 }}
	348
	349	#endif /* _LINUX_CAPABILITY_U32S != 2 */
	350
	351	#define CAP_INIT_INH_SET CAP_EMPTY_SET
	352
	353	# define cap_clear(c) do { (c) = __cap_empty_set; } while (0)
	354	# define cap_set_full(c) do { (c) = __cap_full_set; } while (0)
	355	# define cap_set_init_eff(c) do { (c) = __cap_init_eff_set; } while (0)
	356
	357	#define cap_raise(c, flag) ((c).cap[CAP_TO_INDEX(flag)] \|= CAP_TO_MASK(flag))
	358	#define cap_lower(c, flag) ((c).cap[CAP_TO_INDEX(flag)] &= ~CAP_TO_MASK(flag))
	359	#define cap_raised(c, flag) ((c).cap[CAP_TO_INDEX(flag)] & CAP_TO_MASK(flag))
	360
	361	#define CAP_BOP_ALL(c, a, b, OP) \
	362	do { \
	363	unsigned __capi; \
	364	CAP_FOR_EACH_U32(__capi) { \
	365	c.cap[__capi] = a.cap[__capi] OP b.cap[__capi]; \
	366	} \
	367	} while (0)
	368
	369	#define CAP_UOP_ALL(c, a, OP) \
	370	do { \
	371	unsigned __capi; \
	372	CAP_FOR_EACH_U32(__capi) { \
	373	c.cap[__capi] = OP a.cap[__capi]; \
	374	} \
	375	} while (0)
	376
	377	static inline kernel_cap_t cap_combine(const kernel_cap_t a,
	378	const kernel_cap_t b)
	379	{
	380	kernel_cap_t dest;
	381	CAP_BOP_ALL(dest, a, b, \|);
	382	return dest;
	383	}
1da177e4	384
e338d263 AM	385	static inline kernel_cap_t cap_intersect(const kernel_cap_t a,
	386	const kernel_cap_t b)
	387	{
	388	kernel_cap_t dest;
	389	CAP_BOP_ALL(dest, a, b, &);
	390	return dest;
	391	}
1da177e4	392
e338d263 AM	393	static inline kernel_cap_t cap_drop(const kernel_cap_t a,
	394	const kernel_cap_t drop)
	395	{
	396	kernel_cap_t dest;
	397	CAP_BOP_ALL(dest, a, drop, &~);
	398	return dest;
	399	}
1da177e4	400
e338d263 AM	401	static inline kernel_cap_t cap_invert(const kernel_cap_t c)
	402	{
	403	kernel_cap_t dest;
	404	CAP_UOP_ALL(dest, c, ~);
	405	return dest;
	406	}
1da177e4	407
e338d263 AM	408	static inline int cap_isclear(const kernel_cap_t a)
	409	{
	410	unsigned __capi;
	411	CAP_FOR_EACH_U32(__capi) {
	412	if (a.cap[__capi] != 0)
	413	return 0;
	414	}
	415	return 1;
	416	}
1da177e4	417
e338d263 AM	418	static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set)
	419	{
	420	kernel_cap_t dest;
	421	dest = cap_drop(a, set);
	422	return cap_isclear(dest);
	423	}
1da177e4	424
e338d263	425	/* Used to decide between falling back on the old suser() or fsuser(). */
1da177e4	426
e338d263	427	static inline int cap_is_fs_cap(int cap)
1da177e4	428	{
e338d263 AM	429	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
e338d263 AM	430	return !!(CAP_TO_MASK(cap) & __cap_fs_set.cap[CAP_TO_INDEX(cap)]);
1da177e4 LT	431	}
1da177e4 LT	432
e338d263	433	static inline kernel_cap_t cap_drop_fs_set(const kernel_cap_t a)
1da177e4	434	{
e338d263 AM	435	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
e338d263 AM	436	return cap_drop(a, __cap_fs_set);
1da177e4 LT	437	}
1da177e4 LT	438
e338d263 AM	439	static inline kernel_cap_t cap_raise_fs_set(const kernel_cap_t a,
e338d263 AM	440	const kernel_cap_t permitted)
1da177e4	441	{
e338d263 AM	442	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
	443	return cap_combine(a,
	444	cap_intersect(permitted, __cap_fs_set));
1da177e4 LT	445	}
1da177e4 LT	446
e338d263	447	static inline kernel_cap_t cap_drop_nfsd_set(const kernel_cap_t a)
1da177e4	448	{
e338d263 AM	449	const kernel_cap_t __cap_fs_set = CAP_NFSD_SET;
e338d263 AM	450	return cap_drop(a, __cap_fs_set);
1da177e4 LT	451	}
1da177e4 LT	452
e338d263 AM	453	static inline kernel_cap_t cap_raise_nfsd_set(const kernel_cap_t a,
	454	const kernel_cap_t permitted)
	455	{
	456	const kernel_cap_t __cap_nfsd_set = CAP_NFSD_SET;
	457	return cap_combine(a,
	458	cap_intersect(permitted, __cap_nfsd_set));
	459	}
1da177e4	460
e338d263 AM	461	extern const kernel_cap_t __cap_empty_set;
	462	extern const kernel_cap_t __cap_full_set;
	463	extern const kernel_cap_t __cap_init_eff_set;
1da177e4	464
12b5989b CW	465	int capable(int cap);
12b5989b CW	466	int __capable(struct task_struct *t, int cap);
c59ede7b	467
1da177e4 LT	468	#endif /* __KERNEL__ */
	469
	470	#endif /* !_LINUX_CAPABILITY_H */