1/* 2 * This is <linux/capability.h> 3 * 4 * Andrew G. Morgan <morgan@transmeta.com> 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://linux.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.2/ 11 */ 12 13#ifndef _LINUX_CAPABILITY_H 14#define _LINUX_CAPABILITY_H 15 16#include <linux/types.h> 17#include <linux/fs.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 25#define _LINUX_CAPABILITY_VERSION 0x19980330 26 27typedef struct __user_cap_header_struct { 28 __u32 version; 29 int pid; 30} *cap_user_header_t; 31 32typedef struct __user_cap_data_struct { 33 __u32 effective; 34 __u32 permitted; 35 __u32 inheritable; 36} *cap_user_data_t; 37 38#ifdef __KERNEL__ 39 40/* #define STRICT_CAP_T_TYPECHECKS */ 41 42#ifdef STRICT_CAP_T_TYPECHECKS 43 44typedef struct kernel_cap_struct { 45 __u32 cap; 46} kernel_cap_t; 47 48#else 49 50typedef __u32 kernel_cap_t; 51 52#endif 53 54#define _USER_CAP_HEADER_SIZE (2*sizeof(__u32)) 55#define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t)) 56 57#endif 58 59 60/** 61 ** POSIX-draft defined capabilities. 62 **/ 63 64/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this 65 overrides the restriction of changing file ownership and group 66 ownership. */ 67 68#define CAP_CHOWN 0 69 70/* Override all DAC access, including ACL execute access if 71 [_POSIX_ACL] is defined. Excluding DAC access covered by 72 CAP_LINUX_IMMUTABLE. */ 73 74#define CAP_DAC_OVERRIDE 1 75 76/* Overrides all DAC restrictions regarding read and search on files 77 and directories, including ACL restrictions if [_POSIX_ACL] is 78 defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */ 79 80#define CAP_DAC_READ_SEARCH 2 81 82/* Overrides all restrictions about allowed operations on files, where 83 file owner ID must be equal to the user ID, except where CAP_FSETID 84 is applicable. It doesn't override MAC and DAC restrictions. */ 85 86#define CAP_FOWNER 3 87 88/* Overrides the following restrictions that the effective user ID 89 shall match the file owner ID when setting the S_ISUID and S_ISGID 90 bits on that file; that the effective group ID (or one of the 91 supplementary group IDs) shall match the file owner ID when setting 92 the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are 93 cleared on successful return from chown(2) (not implemented). */ 94 95#define CAP_FSETID 4 96 97/* Used to decide between falling back on the old suser() or fsuser(). */ 98 99#define CAP_FS_MASK 0x1f 100 101/* Overrides the restriction that the real or effective user ID of a 102 process sending a signal must match the real or effective user ID 103 of the process receiving the signal. */ 104 105#define CAP_KILL 5 106 107/* Allows setgid(2) manipulation */ 108/* Allows setgroups(2) */ 109/* Allows forged gids on socket credentials passing. */ 110 111#define CAP_SETGID 6 112 113/* Allows set*uid(2) manipulation (including fsuid). */ 114/* Allows forged pids on socket credentials passing. */ 115 116#define CAP_SETUID 7 117 118 119/** 120 ** Linux-specific capabilities 121 **/ 122 123/* Transfer any capability in your permitted set to any pid, 124 remove any capability in your permitted set from any pid */ 125 126#define CAP_SETPCAP 8 127 128/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */ 129 130#define CAP_LINUX_IMMUTABLE 9 131 132/* Allows binding to TCP/UDP sockets below 1024 */ 133/* Allows binding to ATM VCIs below 32 */ 134 135#define CAP_NET_BIND_SERVICE 10 136 137/* Allow broadcasting, listen to multicast */ 138 139#define CAP_NET_BROADCAST 11 140 141/* Allow interface configuration */ 142/* Allow administration of IP firewall, masquerading and accounting */ 143/* Allow setting debug option on sockets */ 144/* Allow modification of routing tables */ 145/* Allow setting arbitrary process / process group ownership on 146 sockets */ 147/* Allow binding to any address for transparent proxying */ 148/* Allow setting TOS (type of service) */ 149/* Allow setting promiscuous mode */ 150/* Allow clearing driver statistics */ 151/* Allow multicasting */ 152/* Allow read/write of device-specific registers */ 153/* Allow activation of ATM control sockets */ 154 155#define CAP_NET_ADMIN 12 156 157/* Allow use of RAW sockets */ 158/* Allow use of PACKET sockets */ 159 160#define CAP_NET_RAW 13 161 162/* Allow locking of shared memory segments */ 163/* Allow mlock and mlockall (which doesn't really have anything to do 164 with IPC) */ 165 166#define CAP_IPC_LOCK 14 167 168/* Override IPC ownership checks */ 169 170#define CAP_IPC_OWNER 15 171 172/* Insert and remove kernel modules - modify kernel without limit */ 173/* Modify cap_bset */ 174#define CAP_SYS_MODULE 16 175 176/* Allow ioperm/iopl access */ 177/* Allow sending USB messages to any device via /proc/bus/usb */ 178 179#define CAP_SYS_RAWIO 17 180 181/* Allow use of chroot() */ 182 183#define CAP_SYS_CHROOT 18 184 185/* Allow ptrace() of any process */ 186 187#define CAP_SYS_PTRACE 19 188 189/* Allow configuration of process accounting */ 190 191#define CAP_SYS_PACCT 20 192 193/* Allow configuration of the secure attention key */ 194/* Allow administration of the random device */ 195/* Allow examination and configuration of disk quotas */ 196/* Allow configuring the kernel's syslog (printk behaviour) */ 197/* Allow setting the domainname */ 198/* Allow setting the hostname */ 199/* Allow calling bdflush() */ 200/* Allow mount() and umount(), setting up new smb connection */ 201/* Allow some autofs root ioctls */ 202/* Allow nfsservctl */ 203/* Allow VM86_REQUEST_IRQ */ 204/* Allow to read/write pci config on alpha */ 205/* Allow irix_prctl on mips (setstacksize) */ 206/* Allow flushing all cache on m68k (sys_cacheflush) */ 207/* Allow removing semaphores */ 208/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores 209 and shared memory */ 210/* Allow locking/unlocking of shared memory segment */ 211/* Allow turning swap on/off */ 212/* Allow forged pids on socket credentials passing */ 213/* Allow setting readahead and flushing buffers on block devices */ 214/* Allow setting geometry in floppy driver */ 215/* Allow turning DMA on/off in xd driver */ 216/* Allow administration of md devices (mostly the above, but some 217 extra ioctls) */ 218/* Allow tuning the ide driver */ 219/* Allow access to the nvram device */ 220/* Allow administration of apm_bios, serial and bttv (TV) device */ 221/* Allow manufacturer commands in isdn CAPI support driver */ 222/* Allow reading non-standardized portions of pci configuration space */ 223/* Allow DDI debug ioctl on sbpcd driver */ 224/* Allow setting up serial ports */ 225/* Allow sending raw qic-117 commands */ 226/* Allow enabling/disabling tagged queuing on SCSI controllers and sending 227 arbitrary SCSI commands */ 228/* Allow setting encryption key on loopback filesystem */ 229 230#define CAP_SYS_ADMIN 21 231 232/* Allow use of reboot() */ 233 234#define CAP_SYS_BOOT 22 235 236/* Allow raising priority and setting priority on other (different 237 UID) processes */ 238/* Allow use of FIFO and round-robin (realtime) scheduling on own 239 processes and setting the scheduling algorithm used by another 240 process. */ 241 242#define CAP_SYS_NICE 23 243 244/* Override resource limits. Set resource limits. */ 245/* Override quota limits. */ 246/* Override reserved space on ext2 filesystem */ 247/* Modify data journaling mode on ext3 filesystem (uses journaling 248 resources) */ 249/* NOTE: ext2 honors fsuid when checking for resource overrides, so 250 you can override using fsuid too */ 251/* Override size restrictions on IPC message queues */ 252/* Allow more than 64hz interrupts from the real-time clock */ 253/* Override max number of consoles on console allocation */ 254/* Override max number of keymaps */ 255 256#define CAP_SYS_RESOURCE 24 257 258/* Allow manipulation of system clock */ 259/* Allow irix_stime on mips */ 260/* Allow setting the real-time clock */ 261 262#define CAP_SYS_TIME 25 263 264/* Allow configuration of tty devices */ 265/* Allow vhangup() of tty */ 266 267#define CAP_SYS_TTY_CONFIG 26 268 269/* Allow the privileged aspects of mknod() */ 270 271#define CAP_MKNOD 27 272 273/* Allow taking of leases on files */ 274 275#define CAP_LEASE 28 276 277#ifdef __KERNEL__ 278/* 279 * Bounding set 280 */ 281extern kernel_cap_t cap_bset; 282 283/* 284 * Internal kernel functions only 285 */ 286 287#ifdef STRICT_CAP_T_TYPECHECKS 288 289#define to_cap_t(x) { x } 290#define cap_t(x) (x).cap 291 292#else 293 294#define to_cap_t(x) (x) 295#define cap_t(x) (x) 296 297#endif 298 299#define CAP_EMPTY_SET to_cap_t(0) 300#define CAP_FULL_SET to_cap_t(~0) 301#define CAP_INIT_EFF_SET to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP)) 302#define CAP_INIT_INH_SET to_cap_t(0) 303 304#define CAP_TO_MASK(x) (1 << (x)) 305#define cap_raise(c, flag) (cap_t(c) |= CAP_TO_MASK(flag)) 306#define cap_lower(c, flag) (cap_t(c) &= ~CAP_TO_MASK(flag)) 307#define cap_raised(c, flag) (cap_t(c) & CAP_TO_MASK(flag)) 308 309static inline kernel_cap_t cap_combine(kernel_cap_t a, kernel_cap_t b) 310{ 311 kernel_cap_t dest; 312 cap_t(dest) = cap_t(a) | cap_t(b); 313 return dest; 314} 315 316static inline kernel_cap_t cap_intersect(kernel_cap_t a, kernel_cap_t b) 317{ 318 kernel_cap_t dest; 319 cap_t(dest) = cap_t(a) & cap_t(b); 320 return dest; 321} 322 323static inline kernel_cap_t cap_drop(kernel_cap_t a, kernel_cap_t drop) 324{ 325 kernel_cap_t dest; 326 cap_t(dest) = cap_t(a) & ~cap_t(drop); 327 return dest; 328} 329 330static inline kernel_cap_t cap_invert(kernel_cap_t c) 331{ 332 kernel_cap_t dest; 333 cap_t(dest) = ~cap_t(c); 334 return dest; 335} 336 337#define cap_isclear(c) (!cap_t(c)) 338#define cap_issubset(a,set) (!(cap_t(a) & ~cap_t(set))) 339 340#define cap_clear(c) do { cap_t(c) = 0; } while(0) 341#define cap_set_full(c) do { cap_t(c) = ~0; } while(0) 342#define cap_mask(c,mask) do { cap_t(c) &= cap_t(mask); } while(0) 343 344#define cap_is_fs_cap(c) (CAP_TO_MASK(c) & CAP_FS_MASK) 345 346#endif /* __KERNEL__ */ 347 348#endif /* !_LINUX_CAPABILITY_H */ 349