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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: #define CAP_AUDIT_WRITE 29 312: 313: #define CAP_AUDIT_CONTROL 30 314: 315: #define CAP_SETFCAP 31 316: 317: /* Override MAC access. 318: The base kernel enforces no MAC policy. 319: An LSM may enforce a MAC policy, and if it does and it chooses 320: to implement capability based overrides of that policy, this is 321: the capability it should use to do so. */ 322: 323: #define CAP_MAC_OVERRIDE 32 324: 325: /* Allow MAC configuration or state changes. 326: The base kernel requires no MAC configuration. 327: An LSM may enforce a MAC policy, and if it does and it chooses 328: to implement capability based checks on modifications to that 329: policy or the data required to maintain it, this is the 330: capability it should use to do so. */ 331: 332: #define CAP_MAC_ADMIN 33 333: 334: /* Allow configuring the kernel's syslog (printk behaviour) */ 335: 336: #define CAP_SYSLOG 34 337: 338: /* Allow triggering something that will wake the system */ 339: 340: #define CAP_WAKE_ALARM 35 341: 342: /* Allow preventing system suspends */ 343: 344: #define CAP_BLOCK_SUSPEND 36 345: 346: #define CAP_LAST_CAP CAP_BLOCK_SUSPEND 347: 348: #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) 349: 350: /* 351: * Bit location of each capability (used by user-space library and kernel) 352: */ 353: 354: #define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */ 355: #define CAP_TO_MASK(x) (1 << ((x) & 31)) /* mask for indexed __u32 */ 356: 357: 358: #endif /* _UAPI_LINUX_CAPABILITY_H */ 359: