1 /* 2 * This is <linux/capability.h> 3 * 4 * Andrew G. Morgan <[email protected]> 5 * Alexander Kjeldaas <[email protected]> 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 */ 382