include/uapi/linux/capability.h

   1 /*
   2  * This is <linux/capability.h>
   3  *
   4  * Andrew G. Morgan <morgan@kernel.org>
   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://www.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/
  11  */
  12
  13 #ifndef _UAPI_LINUX_CAPABILITY_H
  14 #define _UAPI_LINUX_CAPABILITY_H
  15
  16 #include <linux/types.h>
  17
  18 /* User-level do most of the mapping between kernel and user
  19    capabilities based on the version tag given by the kernel. The
  20    kernel might be somewhat backwards compatible, but don't bet on
  21    it. */
  22
  23 /* Note, cap_t, is defined by POSIX (draft) to be an "opaque" pointer to
  24    a set of three capability sets.  The transposition of 3*the
  25    following structure to such a composite is better handled in a user
  26    library since the draft standard requires the use of malloc/free
  27    etc.. */
  28
  29 #define _LINUX_CAPABILITY_VERSION_1  0x19980330
  30 #define _LINUX_CAPABILITY_U32S_1     1
  31
  32 #define _LINUX_CAPABILITY_VERSION_2  0x20071026  /* deprecated - use v3 */
  33 #define _LINUX_CAPABILITY_U32S_2     2
  34
  35 #define _LINUX_CAPABILITY_VERSION_3  0x20080522
  36 #define _LINUX_CAPABILITY_U32S_3     2
  37
  38 typedef struct __user_cap_header_struct {
  39         __u32 version;
  40         int pid;
  41 } __user *cap_user_header_t;
  42
  43 typedef struct __user_cap_data_struct {
  44         __u32 effective;
  45         __u32 permitted;
  46         __u32 inheritable;
  47 } __user *cap_user_data_t;
  48
  49
  50 #define VFS_CAP_REVISION_MASK   0xFF000000
  51 #define VFS_CAP_REVISION_SHIFT  24
  52 #define VFS_CAP_FLAGS_MASK      ~VFS_CAP_REVISION_MASK
  53 #define VFS_CAP_FLAGS_EFFECTIVE 0x000001
  54
  55 #define VFS_CAP_REVISION_1      0x01000000
  56 #define VFS_CAP_U32_1           1
  57 #define XATTR_CAPS_SZ_1         (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1))
  58
  59 #define VFS_CAP_REVISION_2      0x02000000
  60 #define VFS_CAP_U32_2           2
  61 #define XATTR_CAPS_SZ_2         (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2))
  62
  63 #define VFS_CAP_REVISION_3      0x03000000
  64 #define VFS_CAP_U32_3           2
  65 #define XATTR_CAPS_SZ_3         (sizeof(__le32)*(2 + 2*VFS_CAP_U32_3))
  66
  67 #define XATTR_CAPS_SZ           XATTR_CAPS_SZ_3
  68 #define VFS_CAP_U32             VFS_CAP_U32_3
  69 #define VFS_CAP_REVISION        VFS_CAP_REVISION_3
  70
  71 struct vfs_cap_data {
  72         __le32 magic_etc;            /* Little endian */
  73         struct {
  74                 __le32 permitted;    /* Little endian */
  75                 __le32 inheritable;  /* Little endian */
  76         } data[VFS_CAP_U32];
  77 };
  78
  79 /*
  80  * same as vfs_cap_data but with a rootid at the end
  81  */
  82 struct vfs_ns_cap_data {
  83         __le32 magic_etc;
  84         struct {
  85                 __le32 permitted;    /* Little endian */
  86                 __le32 inheritable;  /* Little endian */
  87         } data[VFS_CAP_U32];
  88         __le32 rootid;
  89 };
  90
  91 #ifndef __KERNEL__
  92
  93 /*
  94  * Backwardly compatible definition for source code - trapped in a
  95  * 32-bit world. If you find you need this, please consider using
  96  * libcap to untrap yourself...
  97  */
  98 #define _LINUX_CAPABILITY_VERSION  _LINUX_CAPABILITY_VERSION_1
  99 #define _LINUX_CAPABILITY_U32S     _LINUX_CAPABILITY_U32S_1
 100
 101 #endif
 102
 103
 104 /**
 105  ** POSIX-draft defined capabilities.
 106  **/
 107
 108 /* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
 109    overrides the restriction of changing file ownership and group
 110    ownership. */
 111
 112 #define CAP_CHOWN            0
 113
 114 /* Override all DAC access, including ACL execute access if
 115    [_POSIX_ACL] is defined. Excluding DAC access covered by
 116    CAP_LINUX_IMMUTABLE. */
 117
 118 #define CAP_DAC_OVERRIDE     1
 119
 120 /* Overrides all DAC restrictions regarding read and search on files
 121    and directories, including ACL restrictions if [_POSIX_ACL] is
 122    defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
 123
 124 #define CAP_DAC_READ_SEARCH  2
 125
 126 /* Overrides all restrictions about allowed operations on files, where
 127    file owner ID must be equal to the user ID, except where CAP_FSETID
 128    is applicable. It doesn't override MAC and DAC restrictions. */
 129
 130 #define CAP_FOWNER           3
 131
 132 /* Overrides the following restrictions that the effective user ID
 133    shall match the file owner ID when setting the S_ISUID and S_ISGID
 134    bits on that file; that the effective group ID (or one of the
 135    supplementary group IDs) shall match the file owner ID when setting
 136    the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
 137    cleared on successful return from chown(2) (not implemented). */
 138
 139 #define CAP_FSETID           4
 140
 141 /* Overrides the restriction that the real or effective user ID of a
 142    process sending a signal must match the real or effective user ID
 143    of the process receiving the signal. */
 144
 145 #define CAP_KILL             5
 146
 147 /* Allows setgid(2) manipulation */
 148 /* Allows setgroups(2) */
 149 /* Allows forged gids on socket credentials passing. */
 150
 151 #define CAP_SETGID           6
 152
 153 /* Allows set*uid(2) manipulation (including fsuid). */
 154 /* Allows forged pids on socket credentials passing. */
 155
 156 #define CAP_SETUID           7
 157
 158
 159 /**
 160  ** Linux-specific capabilities
 161  **/
 162
 163 /* Without VFS support for capabilities:
 164  *   Transfer any capability in your permitted set to any pid,
 165  *   remove any capability in your permitted set from any pid
 166  * With VFS support for capabilities (neither of above, but)
 167  *   Add any capability from current's capability bounding set
 168  *       to the current process' inheritable set
 169  *   Allow taking bits out of capability bounding set
 170  *   Allow modification of the securebits for a process
 171  */
 172
 173 #define CAP_SETPCAP          8
 174
 175 /* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
 176
 177 #define CAP_LINUX_IMMUTABLE  9
 178
 179 /* Allows binding to TCP/UDP sockets below 1024 */
 180 /* Allows binding to ATM VCIs below 32 */
 181
 182 #define CAP_NET_BIND_SERVICE 10
 183
 184 /* Allow broadcasting, listen to multicast */
 185
 186 #define CAP_NET_BROADCAST    11
 187
 188 /* Allow interface configuration */
 189 /* Allow administration of IP firewall, masquerading and accounting */
 190 /* Allow setting debug option on sockets */
 191 /* Allow modification of routing tables */
 192 /* Allow setting arbitrary process / process group ownership on
 193    sockets */
 194 /* Allow binding to any address for transparent proxying (also via NET_RAW) */
 195 /* Allow setting TOS (type of service) */
 196 /* Allow setting promiscuous mode */
 197 /* Allow clearing driver statistics */
 198 /* Allow multicasting */
 199 /* Allow read/write of device-specific registers */
 200 /* Allow activation of ATM control sockets */
 201
 202 #define CAP_NET_ADMIN        12
 203
 204 /* Allow use of RAW sockets */
 205 /* Allow use of PACKET sockets */
 206 /* Allow binding to any address for transparent proxying (also via NET_ADMIN) */
 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 */
 221 #define CAP_SYS_MODULE       16
 222
 223 /* Allow ioperm/iopl access */
 224 /* Allow sending USB messages to any device via /dev/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 setting the domainname */
 244 /* Allow setting the hostname */
 245 /* Allow calling bdflush() */
 246 /* Allow mount() and umount(), setting up new smb connection */
 247 /* Allow some autofs root ioctls */
 248 /* Allow nfsservctl */
 249 /* Allow VM86_REQUEST_IRQ */
 250 /* Allow to read/write pci config on alpha */
 251 /* Allow irix_prctl on mips (setstacksize) */
 252 /* Allow flushing all cache on m68k (sys_cacheflush) */
 253 /* Allow removing semaphores */
 254 /* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
 255    and shared memory */
 256 /* Allow locking/unlocking of shared memory segment */
 257 /* Allow turning swap on/off */
 258 /* Allow forged pids on socket credentials passing */
 259 /* Allow setting readahead and flushing buffers on block devices */
 260 /* Allow setting geometry in floppy driver */
 261 /* Allow turning DMA on/off in xd driver */
 262 /* Allow administration of md devices (mostly the above, but some
 263    extra ioctls) */
 264 /* Allow tuning the ide driver */
 265 /* Allow access to the nvram device */
 266 /* Allow administration of apm_bios, serial and bttv (TV) device */
 267 /* Allow manufacturer commands in isdn CAPI support driver */
 268 /* Allow reading non-standardized portions of pci configuration space */
 269 /* Allow DDI debug ioctl on sbpcd driver */
 270 /* Allow setting up serial ports */
 271 /* Allow sending raw qic-117 commands */
 272 /* Allow enabling/disabling tagged queuing on SCSI controllers and sending
 273    arbitrary SCSI commands */
 274 /* Allow setting encryption key on loopback filesystem */
 275 /* Allow setting zone reclaim policy */
 276
 277 #define CAP_SYS_ADMIN        21
 278
 279 /* Allow use of reboot() */
 280
 281 #define CAP_SYS_BOOT         22
 282
 283 /* Allow raising priority and setting priority on other (different
 284    UID) processes */
 285 /* Allow use of FIFO and round-robin (realtime) scheduling on own
 286    processes and setting the scheduling algorithm used by another
 287    process. */
 288 /* Allow setting cpu affinity on other processes */
 289
 290 #define CAP_SYS_NICE         23
 291
 292 /* Override resource limits. Set resource limits. */
 293 /* Override quota limits. */
 294 /* Override reserved space on ext2 filesystem */
 295 /* Modify data journaling mode on ext3 filesystem (uses journaling
 296    resources) */
 297 /* NOTE: ext2 honors fsuid when checking for resource overrides, so
 298    you can override using fsuid too */
 299 /* Override size restrictions on IPC message queues */
 300 /* Allow more than 64hz interrupts from the real-time clock */
 301 /* Override max number of consoles on console allocation */
 302 /* Override max number of keymaps */
 303
 304 #define CAP_SYS_RESOURCE     24
 305
 306 /* Allow manipulation of system clock */
 307 /* Allow irix_stime on mips */
 308 /* Allow setting the real-time clock */
 309
 310 #define CAP_SYS_TIME         25
 311
 312 /* Allow configuration of tty devices */
 313 /* Allow vhangup() of tty */
 314
 315 #define CAP_SYS_TTY_CONFIG   26
 316
 317 /* Allow the privileged aspects of mknod() */
 318
 319 #define CAP_MKNOD            27
 320
 321 /* Allow taking of leases on files */
 322
 323 #define CAP_LEASE            28
 324
 325 /* Allow writing the audit log via unicast netlink socket */
 326
 327 #define CAP_AUDIT_WRITE      29
 328
 329 /* Allow configuration of audit via unicast netlink socket */
 330
 331 #define CAP_AUDIT_CONTROL    30
 332
 333 #define CAP_SETFCAP          31
 334
 335 /* Override MAC access.
 336    The base kernel enforces no MAC policy.
 337    An LSM may enforce a MAC policy, and if it does and it chooses
 338    to implement capability based overrides of that policy, this is
 339    the capability it should use to do so. */
 340
 341 #define CAP_MAC_OVERRIDE     32
 342
 343 /* Allow MAC configuration or state changes.
 344    The base kernel requires no MAC configuration.
 345    An LSM may enforce a MAC policy, and if it does and it chooses
 346    to implement capability based checks on modifications to that
 347    policy or the data required to maintain it, this is the
 348    capability it should use to do so. */
 349
 350 #define CAP_MAC_ADMIN        33
 351
 352 /* Allow configuring the kernel's syslog (printk behaviour) */
 353
 354 #define CAP_SYSLOG           34
 355
 356 /* Allow triggering something that will wake the system */
 357
 358 #define CAP_WAKE_ALARM            35
 359
 360 /* Allow preventing system suspends */
 361
 362 #define CAP_BLOCK_SUSPEND    36
 363
 364 /* Allow reading the audit log via multicast netlink socket */
 365
 366 #define CAP_AUDIT_READ          37
 367
 368
 369 #define CAP_LAST_CAP         CAP_AUDIT_READ
 370
 371 #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
 372
 373 /*
 374  * Bit location of each capability (used by user-space library and kernel)
 375  */
 376
 377 #define CAP_TO_INDEX(x)     ((x) >> 5)        /* 1 << 5 == bits in __u32 */
 378 #define CAP_TO_MASK(x)      (1 << ((x) & 31)) /* mask for indexed __u32 */
 379
 380
 381 #endif /* _UAPI_LINUX_CAPABILITY_H */