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 struct task_struct; 19 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 25 /* Note, cap_t, is defined by POSIX (draft) to be an "opaque" pointer to 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.. */ 30 31 #define _LINUX_CAPABILITY_VERSION_1 0x19980330 32 #define _LINUX_CAPABILITY_U32S_1 1 33 34 #define _LINUX_CAPABILITY_VERSION_2 0x20071026 /* deprecated - use v3 */ 35 #define _LINUX_CAPABILITY_U32S_2 2 36 37 #define _LINUX_CAPABILITY_VERSION_3 0x20080522 38 #define _LINUX_CAPABILITY_U32S_3 2 39 40 typedef struct __user_cap_header_struct { 41 __u32 version; 42 int pid; 43 } __user *cap_user_header_t; 44 45 typedef struct __user_cap_data_struct { 46 __u32 effective; 47 __u32 permitted; 48 __u32 inheritable; 49 } __user *cap_user_data_t; 50 51 52 #define VFS_CAP_REVISION_MASK 0xFF000000 53 #define VFS_CAP_REVISION_SHIFT 24 54 #define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK 55 #define VFS_CAP_FLAGS_EFFECTIVE 0x000001 56 57 #define VFS_CAP_REVISION_1 0x01000000 58 #define VFS_CAP_U32_1 1 59 #define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1)) 60 61 #define VFS_CAP_REVISION_2 0x02000000 62 #define VFS_CAP_U32_2 2 63 #define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2)) 64 65 #define XATTR_CAPS_SZ XATTR_CAPS_SZ_2 66 #define VFS_CAP_U32 VFS_CAP_U32_2 67 #define VFS_CAP_REVISION VFS_CAP_REVISION_2 68 69 struct vfs_cap_data { 70 __le32 magic_etc; /* Little endian */ 71 struct { 72 __le32 permitted; /* Little endian */ 73 __le32 inheritable; /* Little endian */ 74 } data[VFS_CAP_U32]; 75 }; 76 77 #ifndef __KERNEL__ 78 79 /* 80 * Backwardly compatible definition for source code - trapped in a 81 * 32-bit world. If you find you need this, please consider using 82 * libcap to untrap yourself... 83 */ 84 #define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1 85 #define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1 86 87 #endif 88 89 90 /** 91 ** POSIX-draft defined capabilities. 92 **/ 93 94 /* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this 95 overrides the restriction of changing file ownership and group 96 ownership. */ 97 98 #define CAP_CHOWN 0 99 100 /* Override all DAC access, including ACL execute access if 101 [_POSIX_ACL] is defined. Excluding DAC access covered by 102 CAP_LINUX_IMMUTABLE. */ 103 104 #define CAP_DAC_OVERRIDE 1 105 106 /* Overrides all DAC restrictions regarding read and search on files 107 and directories, including ACL restrictions if [_POSIX_ACL] is 108 defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */ 109 110 #define CAP_DAC_READ_SEARCH 2 111 112 /* Overrides all restrictions about allowed operations on files, where 113 file owner ID must be equal to the user ID, except where CAP_FSETID 114 is applicable. It doesn't override MAC and DAC restrictions. */ 115 116 #define CAP_FOWNER 3 117 118 /* Overrides the following restrictions that the effective user ID 119 shall match the file owner ID when setting the S_ISUID and S_ISGID 120 bits on that file; that the effective group ID (or one of the 121 supplementary group IDs) shall match the file owner ID when setting 122 the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are 123 cleared on successful return from chown(2) (not implemented). */ 124 125 #define CAP_FSETID 4 126 127 /* Overrides the restriction that the real or effective user ID of a 128 process sending a signal must match the real or effective user ID 129 of the process receiving the signal. */ 130 131 #define CAP_KILL 5 132 133 /* Allows setgid(2) manipulation */ 134 /* Allows setgroups(2) */ 135 /* Allows forged gids on socket credentials passing. */ 136 137 #define CAP_SETGID 6 138 139 /* Allows set*uid(2) manipulation (including fsuid). */ 140 /* Allows forged pids on socket credentials passing. */ 141 142 #define CAP_SETUID 7 143 144 145 /** 146 ** Linux-specific capabilities 147 **/ 148 149 /* Without VFS support for capabilities: 150 * Transfer any capability in your permitted set to any pid, 151 * remove any capability in your permitted set from any pid 152 * With VFS support for capabilities (neither of above, but) 153 * Add any capability from current's capability bounding set 154 * to the current process' inheritable set 155 * Allow taking bits out of capability bounding set 156 * Allow modification of the securebits for a process 157 */ 158 159 #define CAP_SETPCAP 8 160 161 /* Allow modification of S_IMMUTABLE and S_APPEND file attributes */ 162 163 #define CAP_LINUX_IMMUTABLE 9 164 165 /* Allows binding to TCP/UDP sockets below 1024 */ 166 /* Allows binding to ATM VCIs below 32 */ 167 168 #define CAP_NET_BIND_SERVICE 10 169 170 /* Allow broadcasting, listen to multicast */ 171 172 #define CAP_NET_BROADCAST 11 173 174 /* Allow interface configuration */ 175 /* Allow administration of IP firewall, masquerading and accounting */ 176 /* Allow setting debug option on sockets */ 177 /* Allow modification of routing tables */ 178 /* Allow setting arbitrary process / process group ownership on 179 sockets */ 180 /* Allow binding to any address for transparent proxying (also via NET_RAW) */ 181 /* Allow setting TOS (type of service) */ 182 /* Allow setting promiscuous mode */ 183 /* Allow clearing driver statistics */ 184 /* Allow multicasting */ 185 /* Allow read/write of device-specific registers */ 186 /* Allow activation of ATM control sockets */ 187 188 #define CAP_NET_ADMIN 12 189 190 /* Allow use of RAW sockets */ 191 /* Allow use of PACKET sockets */ 192 /* Allow binding to any address for transparent proxying (also via NET_ADMIN) */ 193 194 #define CAP_NET_RAW 13 195 196 /* Allow locking of shared memory segments */ 197 /* Allow mlock and mlockall (which doesn't really have anything to do 198 with IPC) */ 199 200 #define CAP_IPC_LOCK 14 201 202 /* Override IPC ownership checks */ 203 204 #define CAP_IPC_OWNER 15 205 206 /* Insert and remove kernel modules - modify kernel without limit */ 207 #define CAP_SYS_MODULE 16 208 209 /* Allow ioperm/iopl access */ 210 /* Allow sending USB messages to any device via /proc/bus/usb */ 211 212 #define CAP_SYS_RAWIO 17 213 214 /* Allow use of chroot() */ 215 216 #define CAP_SYS_CHROOT 18 217 218 /* Allow ptrace() of any process */ 219 220 #define CAP_SYS_PTRACE 19 221 222 /* Allow configuration of process accounting */ 223 224 #define CAP_SYS_PACCT 20 225 226 /* Allow configuration of the secure attention key */ 227 /* Allow administration of the random device */ 228 /* Allow examination and configuration of disk quotas */ 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 */ 261 /* Allow setting zone reclaim policy */ 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) */ 283 /* NOTE: ext2 honors fsuid when checking for resource overrides, so 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 /* Allow writing the audit log via unicast netlink socket */ 312 313 #define CAP_AUDIT_WRITE 29 314 315 /* Allow configuration of audit via unicast netlink socket */ 316 317 #define CAP_AUDIT_CONTROL 30 318 319 #define CAP_SETFCAP 31 320 321 /* Override MAC access. 322 The base kernel enforces no MAC policy. 323 An LSM may enforce a MAC policy, and if it does and it chooses 324 to implement capability based overrides of that policy, this is 325 the capability it should use to do so. */ 326 327 #define CAP_MAC_OVERRIDE 32 328 329 /* Allow MAC configuration or state changes. 330 The base kernel requires no MAC configuration. 331 An LSM may enforce a MAC policy, and if it does and it chooses 332 to implement capability based checks on modifications to that 333 policy or the data required to maintain it, this is the 334 capability it should use to do so. */ 335 336 #define CAP_MAC_ADMIN 33 337 338 /* Allow configuring the kernel's syslog (printk behaviour) */ 339 340 #define CAP_SYSLOG 34 341 342 /* Allow triggering something that will wake the system */ 343 344 #define CAP_WAKE_ALARM 35 345 346 /* Allow preventing system suspends */ 347 348 #define CAP_BLOCK_SUSPEND 36 349 350 /* Allow reading the audit log via multicast netlink socket */ 351 352 #define CAP_AUDIT_READ 37 353 354 355 #define CAP_LAST_CAP CAP_AUDIT_READ 356 357 #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) 358 359 /* 360 * Bit location of each capability (used by user-space library and kernel) 361 */ 362 363 #define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */ 364 #define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */ 365 366 367 #endif /* _UAPI_LINUX_CAPABILITY_H */ 368