capability.h (13546B)
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 39typedef struct __user_cap_header_struct { 40 __u32 version; 41 int pid; 42} __user *cap_user_header_t; 43 44typedef struct __user_cap_data_struct { 45 __u32 effective; 46 __u32 permitted; 47 __u32 inheritable; 48} __user *cap_user_data_t; 49 50 51#define VFS_CAP_REVISION_MASK 0xFF000000 52#define VFS_CAP_REVISION_SHIFT 24 53#define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK 54#define VFS_CAP_FLAGS_EFFECTIVE 0x000001 55 56#define VFS_CAP_REVISION_1 0x01000000 57#define VFS_CAP_U32_1 1 58#define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1)) 59 60#define VFS_CAP_REVISION_2 0x02000000 61#define VFS_CAP_U32_2 2 62#define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2)) 63 64#define VFS_CAP_REVISION_3 0x03000000 65#define VFS_CAP_U32_3 2 66#define XATTR_CAPS_SZ_3 (sizeof(__le32)*(2 + 2*VFS_CAP_U32_3)) 67 68#define XATTR_CAPS_SZ XATTR_CAPS_SZ_3 69#define VFS_CAP_U32 VFS_CAP_U32_3 70#define VFS_CAP_REVISION VFS_CAP_REVISION_3 71 72struct vfs_cap_data { 73 __le32 magic_etc; /* Little endian */ 74 struct { 75 __le32 permitted; /* Little endian */ 76 __le32 inheritable; /* Little endian */ 77 } data[VFS_CAP_U32]; 78}; 79 80/* 81 * same as vfs_cap_data but with a rootid at the end 82 */ 83struct vfs_ns_cap_data { 84 __le32 magic_etc; 85 struct { 86 __le32 permitted; /* Little endian */ 87 __le32 inheritable; /* Little endian */ 88 } data[VFS_CAP_U32]; 89 __le32 rootid; 90}; 91 92#ifndef __KERNEL__ 93 94/* 95 * Backwardly compatible definition for source code - trapped in a 96 * 32-bit world. If you find you need this, please consider using 97 * libcap to untrap yourself... 98 */ 99#define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1 100#define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1 101 102#endif 103 104 105/** 106 ** POSIX-draft defined capabilities. 107 **/ 108 109/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this 110 overrides the restriction of changing file ownership and group 111 ownership. */ 112 113#define CAP_CHOWN 0 114 115/* Override all DAC access, including ACL execute access if 116 [_POSIX_ACL] is defined. Excluding DAC access covered by 117 CAP_LINUX_IMMUTABLE. */ 118 119#define CAP_DAC_OVERRIDE 1 120 121/* Overrides all DAC restrictions regarding read and search on files 122 and directories, including ACL restrictions if [_POSIX_ACL] is 123 defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */ 124 125#define CAP_DAC_READ_SEARCH 2 126 127/* Overrides all restrictions about allowed operations on files, where 128 file owner ID must be equal to the user ID, except where CAP_FSETID 129 is applicable. It doesn't override MAC and DAC restrictions. */ 130 131#define CAP_FOWNER 3 132 133/* Overrides the following restrictions that the effective user ID 134 shall match the file owner ID when setting the S_ISUID and S_ISGID 135 bits on that file; that the effective group ID (or one of the 136 supplementary group IDs) shall match the file owner ID when setting 137 the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are 138 cleared on successful return from chown(2) (not implemented). */ 139 140#define CAP_FSETID 4 141 142/* Overrides the restriction that the real or effective user ID of a 143 process sending a signal must match the real or effective user ID 144 of the process receiving the signal. */ 145 146#define CAP_KILL 5 147 148/* Allows setgid(2) manipulation */ 149/* Allows setgroups(2) */ 150/* Allows forged gids on socket credentials passing. */ 151 152#define CAP_SETGID 6 153 154/* Allows set*uid(2) manipulation (including fsuid). */ 155/* Allows forged pids on socket credentials passing. */ 156 157#define CAP_SETUID 7 158 159 160/** 161 ** Linux-specific capabilities 162 **/ 163 164/* Without VFS support for capabilities: 165 * Transfer any capability in your permitted set to any pid, 166 * remove any capability in your permitted set from any pid 167 * With VFS support for capabilities (neither of above, but) 168 * Add any capability from current's capability bounding set 169 * to the current process' inheritable set 170 * Allow taking bits out of capability bounding set 171 * Allow modification of the securebits for a process 172 */ 173 174#define CAP_SETPCAP 8 175 176/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */ 177 178#define CAP_LINUX_IMMUTABLE 9 179 180/* Allows binding to TCP/UDP sockets below 1024 */ 181/* Allows binding to ATM VCIs below 32 */ 182 183#define CAP_NET_BIND_SERVICE 10 184 185/* Allow broadcasting, listen to multicast */ 186 187#define CAP_NET_BROADCAST 11 188 189/* Allow interface configuration */ 190/* Allow administration of IP firewall, masquerading and accounting */ 191/* Allow setting debug option on sockets */ 192/* Allow modification of routing tables */ 193/* Allow setting arbitrary process / process group ownership on 194 sockets */ 195/* Allow binding to any address for transparent proxying (also via NET_RAW) */ 196/* Allow setting TOS (type of service) */ 197/* Allow setting promiscuous mode */ 198/* Allow clearing driver statistics */ 199/* Allow multicasting */ 200/* Allow read/write of device-specific registers */ 201/* Allow activation of ATM control sockets */ 202 203#define CAP_NET_ADMIN 12 204 205/* Allow use of RAW sockets */ 206/* Allow use of PACKET sockets */ 207/* Allow binding to any address for transparent proxying (also via NET_ADMIN) */ 208 209#define CAP_NET_RAW 13 210 211/* Allow locking of shared memory segments */ 212/* Allow mlock and mlockall (which doesn't really have anything to do 213 with IPC) */ 214 215#define CAP_IPC_LOCK 14 216 217/* Override IPC ownership checks */ 218 219#define CAP_IPC_OWNER 15 220 221/* Insert and remove kernel modules - modify kernel without limit */ 222#define CAP_SYS_MODULE 16 223 224/* Allow ioperm/iopl access */ 225/* Allow sending USB messages to any device via /dev/bus/usb */ 226 227#define CAP_SYS_RAWIO 17 228 229/* Allow use of chroot() */ 230 231#define CAP_SYS_CHROOT 18 232 233/* Allow ptrace() of any process */ 234 235#define CAP_SYS_PTRACE 19 236 237/* Allow configuration of process accounting */ 238 239#define CAP_SYS_PACCT 20 240 241/* Allow configuration of the secure attention key */ 242/* Allow administration of the random device */ 243/* Allow examination and configuration of disk quotas */ 244/* Allow setting the domainname */ 245/* Allow setting the hostname */ 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/* Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility */ 277 278#define CAP_SYS_ADMIN 21 279 280/* Allow use of reboot() */ 281 282#define CAP_SYS_BOOT 22 283 284/* Allow raising priority and setting priority on other (different 285 UID) processes */ 286/* Allow use of FIFO and round-robin (realtime) scheduling on own 287 processes and setting the scheduling algorithm used by another 288 process. */ 289/* Allow setting cpu affinity on other processes */ 290/* Allow setting realtime ioprio class */ 291/* Allow setting ioprio class on other processes */ 292 293#define CAP_SYS_NICE 23 294 295/* Override resource limits. Set resource limits. */ 296/* Override quota limits. */ 297/* Override reserved space on ext2 filesystem */ 298/* Modify data journaling mode on ext3 filesystem (uses journaling 299 resources) */ 300/* NOTE: ext2 honors fsuid when checking for resource overrides, so 301 you can override using fsuid too */ 302/* Override size restrictions on IPC message queues */ 303/* Allow more than 64hz interrupts from the real-time clock */ 304/* Override max number of consoles on console allocation */ 305/* Override max number of keymaps */ 306/* Control memory reclaim behavior */ 307 308#define CAP_SYS_RESOURCE 24 309 310/* Allow manipulation of system clock */ 311/* Allow irix_stime on mips */ 312/* Allow setting the real-time clock */ 313 314#define CAP_SYS_TIME 25 315 316/* Allow configuration of tty devices */ 317/* Allow vhangup() of tty */ 318 319#define CAP_SYS_TTY_CONFIG 26 320 321/* Allow the privileged aspects of mknod() */ 322 323#define CAP_MKNOD 27 324 325/* Allow taking of leases on files */ 326 327#define CAP_LEASE 28 328 329/* Allow writing the audit log via unicast netlink socket */ 330 331#define CAP_AUDIT_WRITE 29 332 333/* Allow configuration of audit via unicast netlink socket */ 334 335#define CAP_AUDIT_CONTROL 30 336 337/* Set or remove capabilities on files. 338 Map uid=0 into a child user namespace. */ 339 340#define CAP_SETFCAP 31 341 342/* Override MAC access. 343 The base kernel enforces no MAC policy. 344 An LSM may enforce a MAC policy, and if it does and it chooses 345 to implement capability based overrides of that policy, this is 346 the capability it should use to do so. */ 347 348#define CAP_MAC_OVERRIDE 32 349 350/* Allow MAC configuration or state changes. 351 The base kernel requires no MAC configuration. 352 An LSM may enforce a MAC policy, and if it does and it chooses 353 to implement capability based checks on modifications to that 354 policy or the data required to maintain it, this is the 355 capability it should use to do so. */ 356 357#define CAP_MAC_ADMIN 33 358 359/* Allow configuring the kernel's syslog (printk behaviour) */ 360 361#define CAP_SYSLOG 34 362 363/* Allow triggering something that will wake the system */ 364 365#define CAP_WAKE_ALARM 35 366 367/* Allow preventing system suspends */ 368 369#define CAP_BLOCK_SUSPEND 36 370 371/* Allow reading the audit log via multicast netlink socket */ 372 373#define CAP_AUDIT_READ 37 374 375/* 376 * Allow system performance and observability privileged operations 377 * using perf_events, i915_perf and other kernel subsystems 378 */ 379 380#define CAP_PERFMON 38 381 382/* 383 * CAP_BPF allows the following BPF operations: 384 * - Creating all types of BPF maps 385 * - Advanced verifier features 386 * - Indirect variable access 387 * - Bounded loops 388 * - BPF to BPF function calls 389 * - Scalar precision tracking 390 * - Larger complexity limits 391 * - Dead code elimination 392 * - And potentially other features 393 * - Loading BPF Type Format (BTF) data 394 * - Retrieve xlated and JITed code of BPF programs 395 * - Use bpf_spin_lock() helper 396 * 397 * CAP_PERFMON relaxes the verifier checks further: 398 * - BPF progs can use of pointer-to-integer conversions 399 * - speculation attack hardening measures are bypassed 400 * - bpf_probe_read to read arbitrary kernel memory is allowed 401 * - bpf_trace_printk to print kernel memory is allowed 402 * 403 * CAP_SYS_ADMIN is required to use bpf_probe_write_user. 404 * 405 * CAP_SYS_ADMIN is required to iterate system wide loaded 406 * programs, maps, links, BTFs and convert their IDs to file descriptors. 407 * 408 * CAP_PERFMON and CAP_BPF are required to load tracing programs. 409 * CAP_NET_ADMIN and CAP_BPF are required to load networking programs. 410 */ 411#define CAP_BPF 39 412 413 414/* Allow checkpoint/restore related operations */ 415/* Allow PID selection during clone3() */ 416/* Allow writing to ns_last_pid */ 417 418#define CAP_CHECKPOINT_RESTORE 40 419 420#define CAP_LAST_CAP CAP_CHECKPOINT_RESTORE 421 422#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) 423 424/* 425 * Bit location of each capability (used by user-space library and kernel) 426 */ 427 428#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */ 429#define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */ 430 431 432#endif /* _UAPI_LINUX_CAPABILITY_H */