1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * This is <linux/capability.h> 4 * 5 * Andrew G. Morgan <morgan@kernel.org> 6 * Alexander Kjeldaas <astor@guardian.no> 7 * with help from Aleph1, Roland Buresund and Andrew Main. 8 * 9 * See here for the libcap library ("POSIX draft" compliance): 10 * 11 * ftp://www.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/ 12 */ 13 14 #ifndef _UAPI_LINUX_CAPABILITY_H 15 #define _UAPI_LINUX_CAPABILITY_H 16 17 #include <linux/types.h> 18 19 /* User-level do most of the mapping between kernel and user 20 capabilities based on the version tag given by the kernel. The 21 kernel might be somewhat backwards compatible, but don't bet on 22 it. */ 23 24 /* Note, cap_t, is defined by POSIX (draft) to be an "opaque" pointer to 25 a set of three capability sets. The transposition of 3*the 26 following structure to such a composite is better handled in a user 27 library since the draft standard requires the use of malloc/free 28 etc.. */ 29 30 #define _LINUX_CAPABILITY_VERSION_1 0x19980330 31 #define _LINUX_CAPABILITY_U32S_1 1 32 33 #define _LINUX_CAPABILITY_VERSION_2 0x20071026 /* deprecated - use v3 */ 34 #define _LINUX_CAPABILITY_U32S_2 2 35 36 #define _LINUX_CAPABILITY_VERSION_3 0x20080522 37 #define _LINUX_CAPABILITY_U32S_3 2 38 39 typedef struct __user_cap_header_struct { 40 __u32 version; 41 int pid; 42 } __user *cap_user_header_t; 43 44 struct __user_cap_data_struct { 45 __u32 effective; 46 __u32 permitted; 47 __u32 inheritable; 48 }; 49 typedef struct __user_cap_data_struct __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 VFS_CAP_REVISION_3 0x03000000 66 #define VFS_CAP_U32_3 2 67 #define XATTR_CAPS_SZ_3 (sizeof(__le32)*(2 + 2*VFS_CAP_U32_3)) 68 69 #define XATTR_CAPS_SZ XATTR_CAPS_SZ_3 70 #define VFS_CAP_U32 VFS_CAP_U32_3 71 #define VFS_CAP_REVISION VFS_CAP_REVISION_3 72 73 struct vfs_cap_data { 74 __le32 magic_etc; /* Little endian */ 75 struct { 76 __le32 permitted; /* Little endian */ 77 __le32 inheritable; /* Little endian */ 78 } data[VFS_CAP_U32]; 79 }; 80 81 /* 82 * same as vfs_cap_data but with a rootid at the end 83 */ 84 struct vfs_ns_cap_data { 85 __le32 magic_etc; 86 struct { 87 __le32 permitted; /* Little endian */ 88 __le32 inheritable; /* Little endian */ 89 } data[VFS_CAP_U32]; 90 __le32 rootid; 91 }; 92 93 #ifndef __KERNEL__ 94 95 /* 96 * Backwardly compatible definition for source code - trapped in a 97 * 32-bit world. If you find you need this, please consider using 98 * libcap to untrap yourself... 99 */ 100 #define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1 101 #define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1 102 103 #endif 104 105 106 /** 107 ** POSIX-draft defined capabilities. 108 **/ 109 110 /* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this 111 overrides the restriction of changing file ownership and group 112 ownership. */ 113 114 #define CAP_CHOWN 0 115 116 /* Override all DAC access, including ACL execute access if 117 [_POSIX_ACL] is defined. Excluding DAC access covered by 118 CAP_LINUX_IMMUTABLE. */ 119 120 #define CAP_DAC_OVERRIDE 1 121 122 /* Overrides all DAC restrictions regarding read and search on files 123 and directories, including ACL restrictions if [_POSIX_ACL] is 124 defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */ 125 126 #define CAP_DAC_READ_SEARCH 2 127 128 /* Overrides all restrictions about allowed operations on files, where 129 file owner ID must be equal to the user ID, except where CAP_FSETID 130 is applicable. It doesn't override MAC and DAC restrictions. */ 131 132 #define CAP_FOWNER 3 133 134 /* Overrides the following restrictions that the effective user ID 135 shall match the file owner ID when setting the S_ISUID and S_ISGID 136 bits on that file; that the effective group ID (or one of the 137 supplementary group IDs) shall match the file owner ID when setting 138 the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are 139 cleared on successful return from chown(2) (not implemented). */ 140 141 #define CAP_FSETID 4 142 143 /* Overrides the restriction that the real or effective user ID of a 144 process sending a signal must match the real or effective user ID 145 of the process receiving the signal. */ 146 147 #define CAP_KILL 5 148 149 /* Allows setgid(2) manipulation */ 150 /* Allows setgroups(2) */ 151 /* Allows forged gids on socket credentials passing. */ 152 153 #define CAP_SETGID 6 154 155 /* Allows set*uid(2) manipulation (including fsuid). */ 156 /* Allows forged pids on socket credentials passing. */ 157 158 #define CAP_SETUID 7 159 160 161 /** 162 ** Linux-specific capabilities 163 **/ 164 165 /* Without VFS support for capabilities: 166 * Transfer any capability in your permitted set to any pid, 167 * remove any capability in your permitted set from any pid 168 * With VFS support for capabilities (neither of above, but) 169 * Add any capability from current's capability bounding set 170 * to the current process' inheritable set 171 * Allow taking bits out of capability bounding set 172 * Allow modification of the securebits for a process 173 */ 174 175 #define CAP_SETPCAP 8 176 177 /* Allow modification of S_IMMUTABLE and S_APPEND file attributes */ 178 179 #define CAP_LINUX_IMMUTABLE 9 180 181 /* Allows binding to TCP/UDP sockets below 1024 */ 182 /* Allows binding to ATM VCIs below 32 */ 183 184 #define CAP_NET_BIND_SERVICE 10 185 186 /* Allow broadcasting, listen to multicast */ 187 188 #define CAP_NET_BROADCAST 11 189 190 /* Allow interface configuration */ 191 /* Allow administration of IP firewall, masquerading and accounting */ 192 /* Allow setting debug option on sockets */ 193 /* Allow modification of routing tables */ 194 /* Allow setting arbitrary process / process group ownership on 195 sockets */ 196 /* Allow binding to any address for transparent proxying (also via NET_RAW) */ 197 /* Allow setting TOS (type of service) */ 198 /* Allow setting promiscuous mode */ 199 /* Allow clearing driver statistics */ 200 /* Allow multicasting */ 201 /* Allow read/write of device-specific registers */ 202 /* Allow activation of ATM control sockets */ 203 204 #define CAP_NET_ADMIN 12 205 206 /* Allow use of RAW sockets */ 207 /* Allow use of PACKET sockets */ 208 /* Allow binding to any address for transparent proxying (also via NET_ADMIN) */ 209 210 #define CAP_NET_RAW 13 211 212 /* Allow locking of shared memory segments */ 213 /* Allow mlock and mlockall (which doesn't really have anything to do 214 with IPC) */ 215 216 #define CAP_IPC_LOCK 14 217 218 /* Override IPC ownership checks */ 219 220 #define CAP_IPC_OWNER 15 221 222 /* Insert and remove kernel modules - modify kernel without limit */ 223 #define CAP_SYS_MODULE 16 224 225 /* Allow ioperm/iopl access */ 226 /* Allow sending USB messages to any device via /dev/bus/usb */ 227 228 #define CAP_SYS_RAWIO 17 229 230 /* Allow use of chroot() */ 231 232 #define CAP_SYS_CHROOT 18 233 234 /* Allow ptrace() of any process */ 235 236 #define CAP_SYS_PTRACE 19 237 238 /* Allow configuration of process accounting */ 239 240 #define CAP_SYS_PACCT 20 241 242 /* Allow configuration of the secure attention key */ 243 /* Allow administration of the random device */ 244 /* Allow examination and configuration of disk quotas */ 245 /* Allow setting the domainname */ 246 /* Allow setting the hostname */ 247 /* Allow mount() and umount(), setting up new smb connection */ 248 /* Allow some autofs root ioctls */ 249 /* Allow nfsservctl */ 250 /* Allow VM86_REQUEST_IRQ */ 251 /* Allow to read/write pci config on alpha */ 252 /* Allow irix_prctl on mips (setstacksize) */ 253 /* Allow flushing all cache on m68k (sys_cacheflush) */ 254 /* Allow removing semaphores */ 255 /* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores 256 and shared memory */ 257 /* Allow locking/unlocking of shared memory segment */ 258 /* Allow turning swap on/off */ 259 /* Allow forged pids on socket credentials passing */ 260 /* Allow setting readahead and flushing buffers on block devices */ 261 /* Allow setting geometry in floppy driver */ 262 /* Allow turning DMA on/off in xd driver */ 263 /* Allow administration of md devices (mostly the above, but some 264 extra ioctls) */ 265 /* Allow tuning the ide driver */ 266 /* Allow access to the nvram device */ 267 /* Allow administration of apm_bios, serial and bttv (TV) device */ 268 /* Allow manufacturer commands in isdn CAPI support driver */ 269 /* Allow reading non-standardized portions of pci configuration space */ 270 /* Allow DDI debug ioctl on sbpcd driver */ 271 /* Allow setting up serial ports */ 272 /* Allow sending raw qic-117 commands */ 273 /* Allow enabling/disabling tagged queuing on SCSI controllers and sending 274 arbitrary SCSI commands */ 275 /* Allow setting encryption key on loopback filesystem */ 276 /* Allow setting zone reclaim policy */ 277 /* Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility */ 278 279 #define CAP_SYS_ADMIN 21 280 281 /* Allow use of reboot() */ 282 283 #define CAP_SYS_BOOT 22 284 285 /* Allow raising priority and setting priority on other (different 286 UID) processes */ 287 /* Allow use of FIFO and round-robin (realtime) scheduling on own 288 processes and setting the scheduling algorithm used by another 289 process. */ 290 /* Allow setting cpu affinity on other processes */ 291 /* Allow setting realtime ioprio class */ 292 /* Allow setting ioprio class on other processes */ 293 294 #define CAP_SYS_NICE 23 295 296 /* Override resource limits. Set resource limits. */ 297 /* Override quota limits. */ 298 /* Override reserved space on ext2 filesystem */ 299 /* Modify data journaling mode on ext3 filesystem (uses journaling 300 resources) */ 301 /* NOTE: ext2 honors fsuid when checking for resource overrides, so 302 you can override using fsuid too */ 303 /* Override size restrictions on IPC message queues */ 304 /* Allow more than 64hz interrupts from the real-time clock */ 305 /* Override max number of consoles on console allocation */ 306 /* Override max number of keymaps */ 307 /* Control memory reclaim behavior */ 308 309 #define CAP_SYS_RESOURCE 24 310 311 /* Allow manipulation of system clock */ 312 /* Allow irix_stime on mips */ 313 /* Allow setting the real-time clock */ 314 315 #define CAP_SYS_TIME 25 316 317 /* Allow configuration of tty devices */ 318 /* Allow vhangup() of tty */ 319 320 #define CAP_SYS_TTY_CONFIG 26 321 322 /* Allow the privileged aspects of mknod() */ 323 324 #define CAP_MKNOD 27 325 326 /* Allow taking of leases on files */ 327 328 #define CAP_LEASE 28 329 330 /* Allow writing the audit log via unicast netlink socket */ 331 332 #define CAP_AUDIT_WRITE 29 333 334 /* Allow configuration of audit via unicast netlink socket */ 335 336 #define CAP_AUDIT_CONTROL 30 337 338 /* Set or remove capabilities on files. 339 Map uid=0 into a child user namespace. */ 340 341 #define CAP_SETFCAP 31 342 343 /* Override MAC access. 344 The base kernel enforces no MAC policy. 345 An LSM may enforce a MAC policy, and if it does and it chooses 346 to implement capability based overrides of that policy, this is 347 the capability it should use to do so. */ 348 349 #define CAP_MAC_OVERRIDE 32 350 351 /* Allow MAC configuration or state changes. 352 The base kernel requires no MAC configuration. 353 An LSM may enforce a MAC policy, and if it does and it chooses 354 to implement capability based checks on modifications to that 355 policy or the data required to maintain it, this is the 356 capability it should use to do so. */ 357 358 #define CAP_MAC_ADMIN 33 359 360 /* Allow configuring the kernel's syslog (printk behaviour) */ 361 362 #define CAP_SYSLOG 34 363 364 /* Allow triggering something that will wake the system */ 365 366 #define CAP_WAKE_ALARM 35 367 368 /* Allow preventing system suspends */ 369 370 #define CAP_BLOCK_SUSPEND 36 371 372 /* Allow reading the audit log via multicast netlink socket */ 373 374 #define CAP_AUDIT_READ 37 375 376 /* 377 * Allow system performance and observability privileged operations 378 * using perf_events, i915_perf and other kernel subsystems 379 */ 380 381 #define CAP_PERFMON 38 382 383 /* 384 * CAP_BPF allows the following BPF operations: 385 * - Creating all types of BPF maps 386 * - Advanced verifier features 387 * - Indirect variable access 388 * - Bounded loops 389 * - BPF to BPF function calls 390 * - Scalar precision tracking 391 * - Larger complexity limits 392 * - Dead code elimination 393 * - And potentially other features 394 * - Loading BPF Type Format (BTF) data 395 * - Retrieve xlated and JITed code of BPF programs 396 * - Use bpf_spin_lock() helper 397 * 398 * CAP_PERFMON relaxes the verifier checks further: 399 * - BPF progs can use of pointer-to-integer conversions 400 * - speculation attack hardening measures are bypassed 401 * - bpf_probe_read to read arbitrary kernel memory is allowed 402 * - bpf_trace_printk to print kernel memory is allowed 403 * 404 * CAP_SYS_ADMIN is required to use bpf_probe_write_user. 405 * 406 * CAP_SYS_ADMIN is required to iterate system wide loaded 407 * programs, maps, links, BTFs and convert their IDs to file descriptors. 408 * 409 * CAP_PERFMON and CAP_BPF are required to load tracing programs. 410 * CAP_NET_ADMIN and CAP_BPF are required to load networking programs. 411 */ 412 #define CAP_BPF 39 413 414 415 /* Allow checkpoint/restore related operations */ 416 /* Allow PID selection during clone3() */ 417 /* Allow writing to ns_last_pid */ 418 419 #define CAP_CHECKPOINT_RESTORE 40 420 421 #define CAP_LAST_CAP CAP_CHECKPOINT_RESTORE 422 423 #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) 424 425 /* 426 * Bit location of each capability (used by user-space library and kernel) 427 */ 428 429 #define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */ 430 #define CAP_TO_MASK(x) (1U << ((x) & 31)) /* mask for indexed __u32 */ 431 432 433 #endif /* _UAPI_LINUX_CAPABILITY_H */ 434