[linux-2.6-block.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 from current's capability bounding set
 *       to the current process' inheritable set
 *   Allow taking bits out of capability bounding set
 *   Allow modification of the securebits for a process
 */

#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 */
#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

/* Override MAC access.
   The base kernel enforces no MAC policy.
   An LSM may enforce a MAC policy, and if it does and it chooses
   to implement capability based overrides of that policy, this is
   the capability it should use to do so. */

#define CAP_MAC_OVERRIDE     32

/* Allow MAC configuration or state changes.
   The base kernel requires no MAC configuration.
   An LSM may enforce a MAC policy, and if it does and it chooses
   to implement capability based checks on modifications to that
   policy or the data required to maintain it, this is the
   capability it should use to do so. */

#define CAP_MAC_ADMIN        33

#define CAP_LAST_CAP         CAP_MAC_ADMIN

#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)

/*
 * 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))

# define CAP_FS_MASK_B1     (CAP_TO_MASK(CAP_MAC_OVERRIDE))

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

# define CAP_EMPTY_SET    ((kernel_cap_t){{ 0, 0 }})
# define CAP_FULL_SET     ((kernel_cap_t){{ ~0, ~0 }})
# define CAP_INIT_EFF_SET ((kernel_cap_t){{ ~CAP_TO_MASK(CAP_SETPCAP), ~0 }})
# define CAP_FS_SET       ((kernel_cap_t){{ CAP_FS_MASK_B0, CAP_FS_MASK_B1 } })
# define CAP_NFSD_SET     ((kernel_cap_t){{ CAP_FS_MASK_B0|CAP_TO_MASK(CAP_SYS_RESOURCE), \
					CAP_FS_MASK_B1 } })

#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)
3b7391de SH	155	* Add any capability from current's capability bounding set
	156	* to the current process' inheritable set
	157	* Allow taking bits out of capability bounding set
3898b1b4	158	* Allow modification of the securebits for a process
e338d263	159	*/
1da177e4 LT	160
	161	#define CAP_SETPCAP 8
	162
	163	/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
	164
	165	#define CAP_LINUX_IMMUTABLE 9
	166
	167	/* Allows binding to TCP/UDP sockets below 1024 */
	168	/* Allows binding to ATM VCIs below 32 */
	169
	170	#define CAP_NET_BIND_SERVICE 10
	171
	172	/* Allow broadcasting, listen to multicast */
	173
	174	#define CAP_NET_BROADCAST 11
	175
	176	/* Allow interface configuration */
	177	/* Allow administration of IP firewall, masquerading and accounting */
	178	/* Allow setting debug option on sockets */
	179	/* Allow modification of routing tables */
	180	/* Allow setting arbitrary process / process group ownership on
	181	sockets */
	182	/* Allow binding to any address for transparent proxying */
	183	/* Allow setting TOS (type of service) */
	184	/* Allow setting promiscuous mode */
	185	/* Allow clearing driver statistics */
	186	/* Allow multicasting */
	187	/* Allow read/write of device-specific registers */
	188	/* Allow activation of ATM control sockets */
	189
	190	#define CAP_NET_ADMIN 12
	191
	192	/* Allow use of RAW sockets */
	193	/* Allow use of PACKET sockets */
	194
	195	#define CAP_NET_RAW 13
	196
	197	/* Allow locking of shared memory segments */
	198	/* Allow mlock and mlockall (which doesn't really have anything to do
	199	with IPC) */
	200
	201	#define CAP_IPC_LOCK 14
	202
	203	/* Override IPC ownership checks */
	204
	205	#define CAP_IPC_OWNER 15
	206
	207	/* Insert and remove kernel modules - modify kernel without limit */
1da177e4 LT	208	#define CAP_SYS_MODULE 16
	209
	210	/* Allow ioperm/iopl access */
	211	/* Allow sending USB messages to any device via /proc/bus/usb */
	212
	213	#define CAP_SYS_RAWIO 17
	214
	215	/* Allow use of chroot() */
	216
	217	#define CAP_SYS_CHROOT 18
	218
	219	/* Allow ptrace() of any process */
	220
	221	#define CAP_SYS_PTRACE 19
	222
	223	/* Allow configuration of process accounting */
	224
	225	#define CAP_SYS_PACCT 20
	226
	227	/* Allow configuration of the secure attention key */
	228	/* Allow administration of the random device */
	229	/* Allow examination and configuration of disk quotas */
	230	/* Allow configuring the kernel's syslog (printk behaviour) */
	231	/* Allow setting the domainname */
	232	/* Allow setting the hostname */
	233	/* Allow calling bdflush() */
	234	/* Allow mount() and umount(), setting up new smb connection */
	235	/* Allow some autofs root ioctls */
	236	/* Allow nfsservctl */
	237	/* Allow VM86_REQUEST_IRQ */
	238	/* Allow to read/write pci config on alpha */
	239	/* Allow irix_prctl on mips (setstacksize) */
	240	/* Allow flushing all cache on m68k (sys_cacheflush) */
	241	/* Allow removing semaphores */
	242	/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
	243	and shared memory */
	244	/* Allow locking/unlocking of shared memory segment */
	245	/* Allow turning swap on/off */
	246	/* Allow forged pids on socket credentials passing */
	247	/* Allow setting readahead and flushing buffers on block devices */
	248	/* Allow setting geometry in floppy driver */
	249	/* Allow turning DMA on/off in xd driver */
	250	/* Allow administration of md devices (mostly the above, but some
	251	extra ioctls) */
	252	/* Allow tuning the ide driver */
	253	/* Allow access to the nvram device */
	254	/* Allow administration of apm_bios, serial and bttv (TV) device */
	255	/* Allow manufacturer commands in isdn CAPI support driver */
	256	/* Allow reading non-standardized portions of pci configuration space */
	257	/* Allow DDI debug ioctl on sbpcd driver */
	258	/* Allow setting up serial ports */
	259	/* Allow sending raw qic-117 commands */
	260	/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
	261	arbitrary SCSI commands */
	262	/* Allow setting encryption key on loopback filesystem */
bce5f6ba	263	/* Allow setting zone reclaim policy */
1da177e4 LT	264
	265	#define CAP_SYS_ADMIN 21
	266
	267	/* Allow use of reboot() */
	268
	269	#define CAP_SYS_BOOT 22
	270
	271	/* Allow raising priority and setting priority on other (different
	272	UID) processes */
	273	/* Allow use of FIFO and round-robin (realtime) scheduling on own
	274	processes and setting the scheduling algorithm used by another
	275	process. */
	276	/* Allow setting cpu affinity on other processes */
	277
	278	#define CAP_SYS_NICE 23
	279
	280	/* Override resource limits. Set resource limits. */
	281	/* Override quota limits. */
	282	/* Override reserved space on ext2 filesystem */
	283	/* Modify data journaling mode on ext3 filesystem (uses journaling
	284	resources) */
b5376771	285	/* NOTE: ext2 honors fsuid when checking for resource overrides, so
1da177e4 LT	286	you can override using fsuid too */
	287	/* Override size restrictions on IPC message queues */
	288	/* Allow more than 64hz interrupts from the real-time clock */
	289	/* Override max number of consoles on console allocation */
	290	/* Override max number of keymaps */
	291
	292	#define CAP_SYS_RESOURCE 24
	293
	294	/* Allow manipulation of system clock */
	295	/* Allow irix_stime on mips */
	296	/* Allow setting the real-time clock */
	297
	298	#define CAP_SYS_TIME 25
	299
	300	/* Allow configuration of tty devices */
	301	/* Allow vhangup() of tty */
	302
	303	#define CAP_SYS_TTY_CONFIG 26
	304
	305	/* Allow the privileged aspects of mknod() */
	306
	307	#define CAP_MKNOD 27
	308
	309	/* Allow taking of leases on files */
	310
	311	#define CAP_LEASE 28
	312
	313	#define CAP_AUDIT_WRITE 29
	314
	315	#define CAP_AUDIT_CONTROL 30
	316
b5376771 SH	317	#define CAP_SETFCAP 31
b5376771 SH	318
e114e473 CS	319	/* Override MAC access.
	320	The base kernel enforces no MAC policy.
	321	An LSM may enforce a MAC policy, and if it does and it chooses
	322	to implement capability based overrides of that policy, this is
	323	the capability it should use to do so. */
	324
	325	#define CAP_MAC_OVERRIDE 32
	326
	327	/* Allow MAC configuration or state changes.
	328	The base kernel requires no MAC configuration.
	329	An LSM may enforce a MAC policy, and if it does and it chooses
	330	to implement capability based checks on modifications to that
	331	policy or the data required to maintain it, this is the
	332	capability it should use to do so. */
	333
	334	#define CAP_MAC_ADMIN 33
	335
	336	#define CAP_LAST_CAP CAP_MAC_ADMIN
3b7391de SH	337
	338	#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
	339
e338d263 AM	340	/*
	341	* Bit location of each capability (used by user-space library and kernel)
	342	*/
	343
	344	#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
	345	#define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */
	346
1da177e4	347	#ifdef __KERNEL__
1da177e4 LT	348
	349	/*
	350	* Internal kernel functions only
	351	*/
b5376771	352
e338d263 AM	353	#define CAP_FOR_EACH_U32(__capi) \
	354	for (__capi = 0; __capi < _LINUX_CAPABILITY_U32S; ++__capi)
	355
	356	# define CAP_FS_MASK_B0 (CAP_TO_MASK(CAP_CHOWN) \
	357	\| CAP_TO_MASK(CAP_DAC_OVERRIDE) \
	358	\| CAP_TO_MASK(CAP_DAC_READ_SEARCH) \
	359	\| CAP_TO_MASK(CAP_FOWNER) \
	360	\| CAP_TO_MASK(CAP_FSETID))
	361
e114e473 CS	362	# define CAP_FS_MASK_B1 (CAP_TO_MASK(CAP_MAC_OVERRIDE))
e114e473 CS	363
e338d263 AM	364	#if _LINUX_CAPABILITY_U32S != 2
	365	# error Fix up hand-coded capability macro initializers
	366	#else /* HAND-CODED capability initializers */
	367
25f2ea9f DH	368	# define CAP_EMPTY_SET ((kernel_cap_t){{ 0, 0 }})
	369	# define CAP_FULL_SET ((kernel_cap_t){{ ~0, ~0 }})
	370	# define CAP_INIT_EFF_SET ((kernel_cap_t){{ ~CAP_TO_MASK(CAP_SETPCAP), ~0 }})
	371	# define CAP_FS_SET ((kernel_cap_t){{ CAP_FS_MASK_B0, CAP_FS_MASK_B1 } })
	372	# define CAP_NFSD_SET ((kernel_cap_t){{ CAP_FS_MASK_B0\|CAP_TO_MASK(CAP_SYS_RESOURCE), \
	373	CAP_FS_MASK_B1 } })
e338d263 AM	374
	375	#endif /* _LINUX_CAPABILITY_U32S != 2 */
	376
	377	#define CAP_INIT_INH_SET CAP_EMPTY_SET
	378
	379	# define cap_clear(c) do { (c) = __cap_empty_set; } while (0)
	380	# define cap_set_full(c) do { (c) = __cap_full_set; } while (0)
	381	# define cap_set_init_eff(c) do { (c) = __cap_init_eff_set; } while (0)
	382
	383	#define cap_raise(c, flag) ((c).cap[CAP_TO_INDEX(flag)] \|= CAP_TO_MASK(flag))
	384	#define cap_lower(c, flag) ((c).cap[CAP_TO_INDEX(flag)] &= ~CAP_TO_MASK(flag))
	385	#define cap_raised(c, flag) ((c).cap[CAP_TO_INDEX(flag)] & CAP_TO_MASK(flag))
	386
	387	#define CAP_BOP_ALL(c, a, b, OP) \
	388	do { \
	389	unsigned __capi; \
	390	CAP_FOR_EACH_U32(__capi) { \
	391	c.cap[__capi] = a.cap[__capi] OP b.cap[__capi]; \
	392	} \
	393	} while (0)
	394
	395	#define CAP_UOP_ALL(c, a, OP) \
	396	do { \
	397	unsigned __capi; \
	398	CAP_FOR_EACH_U32(__capi) { \
	399	c.cap[__capi] = OP a.cap[__capi]; \
	400	} \
	401	} while (0)
	402
	403	static inline kernel_cap_t cap_combine(const kernel_cap_t a,
	404	const kernel_cap_t b)
	405	{
	406	kernel_cap_t dest;
	407	CAP_BOP_ALL(dest, a, b, \|);
	408	return dest;
	409	}
1da177e4	410
e338d263 AM	411	static inline kernel_cap_t cap_intersect(const kernel_cap_t a,
	412	const kernel_cap_t b)
	413	{
	414	kernel_cap_t dest;
	415	CAP_BOP_ALL(dest, a, b, &);
	416	return dest;
	417	}
1da177e4	418
e338d263 AM	419	static inline kernel_cap_t cap_drop(const kernel_cap_t a,
	420	const kernel_cap_t drop)
	421	{
	422	kernel_cap_t dest;
	423	CAP_BOP_ALL(dest, a, drop, &~);
	424	return dest;
	425	}
1da177e4	426
e338d263 AM	427	static inline kernel_cap_t cap_invert(const kernel_cap_t c)
	428	{
	429	kernel_cap_t dest;
	430	CAP_UOP_ALL(dest, c, ~);
	431	return dest;
	432	}
1da177e4	433
e338d263 AM	434	static inline int cap_isclear(const kernel_cap_t a)
	435	{
	436	unsigned __capi;
	437	CAP_FOR_EACH_U32(__capi) {
	438	if (a.cap[__capi] != 0)
	439	return 0;
	440	}
	441	return 1;
	442	}
1da177e4	443
e338d263 AM	444	static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set)
	445	{
	446	kernel_cap_t dest;
	447	dest = cap_drop(a, set);
	448	return cap_isclear(dest);
	449	}
1da177e4	450
e338d263	451	/* Used to decide between falling back on the old suser() or fsuser(). */
1da177e4	452
e338d263	453	static inline int cap_is_fs_cap(int cap)
1da177e4	454	{
e338d263 AM	455	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
e338d263 AM	456	return !!(CAP_TO_MASK(cap) & __cap_fs_set.cap[CAP_TO_INDEX(cap)]);
1da177e4 LT	457	}
1da177e4 LT	458
e338d263	459	static inline kernel_cap_t cap_drop_fs_set(const kernel_cap_t a)
1da177e4	460	{
e338d263 AM	461	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
e338d263 AM	462	return cap_drop(a, __cap_fs_set);
1da177e4 LT	463	}
1da177e4 LT	464
e338d263 AM	465	static inline kernel_cap_t cap_raise_fs_set(const kernel_cap_t a,
e338d263 AM	466	const kernel_cap_t permitted)
1da177e4	467	{
e338d263 AM	468	const kernel_cap_t __cap_fs_set = CAP_FS_SET;
	469	return cap_combine(a,
	470	cap_intersect(permitted, __cap_fs_set));
1da177e4 LT	471	}
1da177e4 LT	472
e338d263	473	static inline kernel_cap_t cap_drop_nfsd_set(const kernel_cap_t a)
1da177e4	474	{
e338d263 AM	475	const kernel_cap_t __cap_fs_set = CAP_NFSD_SET;
e338d263 AM	476	return cap_drop(a, __cap_fs_set);
1da177e4 LT	477	}
1da177e4 LT	478
e338d263 AM	479	static inline kernel_cap_t cap_raise_nfsd_set(const kernel_cap_t a,
	480	const kernel_cap_t permitted)
	481	{
	482	const kernel_cap_t __cap_nfsd_set = CAP_NFSD_SET;
	483	return cap_combine(a,
	484	cap_intersect(permitted, __cap_nfsd_set));
	485	}
1da177e4	486
e338d263 AM	487	extern const kernel_cap_t __cap_empty_set;
	488	extern const kernel_cap_t __cap_full_set;
	489	extern const kernel_cap_t __cap_init_eff_set;
1da177e4	490
12b5989b CW	491	int capable(int cap);
12b5989b CW	492	int __capable(struct task_struct *t, int cap);
c59ede7b	493
1da177e4 LT	494	#endif /* __KERNEL__ */
	495
	496	#endif /* !_LINUX_CAPABILITY_H */