include/linux/capability.h
13847 /*
13848 * This is <linux/capability.h>
13849 *
13850 * Andrew G. Morgan <morgan@transmeta.com>
13851 * Alexander Kjeldaas <astor@guardian.no>
13852 * with help from Aleph1, Roland Buresund and Andrew
13853 * Main. */
13854
13855 #ifndef _LINUX_CAPABILITY_H
13856 #define _LINUX_CAPABILITY_H
13857
13858 #include <linux/types.h>
13859 #include <linux/fs.h>
13860
13861 /* User-level do most of the mapping between kernel and
13862 user capabilities based on the version tag given by
13863 the kernel. The kernel might be somewhat backwards
13864 compatible, but don't bet on it. */
13865
13866 /* XXX - Note, cap_t, is defined by POSIX to be an
13867 "opaque" pointer to a set of three capability sets.
13868 The transposition of 3*the following structure to such
13869 a composite is better handled in a user library since
13870 the draft standard requires the use of malloc/free
13871 etc.. */
13872
13873 #define _LINUX_CAPABILITY_VERSION 0x19980330
13874
13875 typedef struct __user_cap_header_struct {
13876 __u32 version;
13877 int pid;
13878 } *cap_user_header_t;
13879
13880 typedef struct __user_cap_data_struct {
13881 __u32 effective;
13882 __u32 permitted;
13883 __u32 inheritable;
13884 } *cap_user_data_t;
13885
13886 #ifdef __KERNEL__
13887
13888 /* #define STRICT_CAP_T_TYPECHECKS */
13889
13890 #ifdef STRICT_CAP_T_TYPECHECKS
13891
13892 typedef struct kernel_cap_struct {
13893 __u32 cap;
13894 } kernel_cap_t;
13895
13896 #else
13897
13898 typedef __u32 kernel_cap_t;
13899
13900 #endif
13901
13902 #define _USER_CAP_HEADER_SIZE (2*sizeof(__u32))
13903 #define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t))
13904
13905 #endif
13906
13907
13908 /**
13909 ** POSIX-draft defined capabilities.
13910 **/
13911
13912 /* In a system with the [_POSIX_CHOWN_RESTRICTED] option
13913 defined, this overrides the restriction of changing
13914 file ownership and group ownership. */
13915
13916 #define CAP_CHOWN 0
13917
13918 /* Override all DAC access, including ACL execute access
13919 if [_POSIX_ACL] is defined. Excluding DAC access
13920 covered by CAP_LINUX_IMMUTABLE. */
13921
13922 #define CAP_DAC_OVERRIDE 1
13923
13924 /* Overrides all DAC restrictions regarding read and
13925 search on files and directories, including ACL
13926 restrictions if [_POSIX_ACL] is defined. Excluding DAC
13927 access covered by CAP_LINUX_IMMUTABLE. */
13928
13929 #define CAP_DAC_READ_SEARCH 2
13930
13931 /* Overrides all restrictions about allowed operations on
13932 files, where file owner ID must be equal to the user
13933 ID, except where CAP_FSETID is applicable. It doesn't
13934 override MAC and DAC restrictions. */
13935
13936 #define CAP_FOWNER 3
13937
13938 /* Overrides the following restrictions that the
13939 effective user ID shall match the file owner ID when
13940 setting the S_ISUID and S_ISGID bits on that file;
13941 that the effective group ID (or one of the
13942 supplementary group IDs shall match the file owner ID
13943 when setting the S_ISGID bit on that file; that the
13944 S_ISUID and S_ISGID bits are cleared on successful
13945 return from chown(2). */
13946
13947 #define CAP_FSETID 4
13948
13949 /* Used to decide between falling back on the old suser()
13950 or fsuser(). */
13951
13952 #define CAP_FS_MASK 0x1f
13953
13954 /* Overrides the restriction that the real or effective
13955 user ID of a process sending a signal must match the
13956 real or effective user ID of the process receiving the
13957 signal. */
13958
13959 #define CAP_KILL 5
13960
13961 /* Allows setgid(2) manipulation */
13962 /* Allows setgroups(2) */
13963 /* Allows forged gids on socket credentials passing. */
13964
13965 #define CAP_SETGID 6
13966
13967 /* Allows set*uid(2) manipulation (including fsuid). */
13968 /* Allows forged pids on socket credentials passing. */
13969
13970 #define CAP_SETUID 7
13971
13972
13973 /**
13974 ** Linux-specific capabilities
13975 **/
13976
13977 /* Transfer any capability in your permitted set to any
13978 pid, remove any capability in your permitted set from
13979 any pid */
13980
13981 #define CAP_SETPCAP 8
13982
13983 /* Allow modification of S_IMMUTABLE and S_APPEND file
13984 attributes */
13985
13986 #define CAP_LINUX_IMMUTABLE 9
13987
13988 /* Allows binding to TCP/UDP sockets below 1024 */
13989
13990 #define CAP_NET_BIND_SERVICE 10
13991
13992 /* Allow broadcasting, listen to multicast */
13993
13994 #define CAP_NET_BROADCAST 11
13995
13996 /* Allow interface configuration */
13997 /* Allow administration of IP firewall, masquerading and
13998 accounting */
13999 /* Allow setting debug option on sockets */
14000 /* Allow modification of routing tables */
14001 /* Allow setting arbitrary process / process group
14002 ownership on sockets */
14003 /* Allow binding to any addr for transparent proxying */
14004 /* Allow setting TOS (type of service) */
14005 /* Allow setting promiscuous mode */
14006 /* Allow clearing driver statistics */
14007 /* Allow multicasting */
14008 /* Allow read/write of device-specific registers */
14009
14010 #define CAP_NET_ADMIN 12
14011
14012 /* Allow use of RAW sockets */
14013 /* Allow use of PACKET sockets */
14014
14015 #define CAP_NET_RAW 13
14016
14017 /* Allow locking of shared memory segments */
14018 /* Allow mlock and mlockall (which doesn't really have
14019 anything to do with IPC) */
14020
14021 #define CAP_IPC_LOCK 14
14022
14023 /* Override IPC ownership checks */
14024
14025 #define CAP_IPC_OWNER 15
14026
14027 /* Insert and remove kernel modules */
14028
14029 #define CAP_SYS_MODULE 16
14030
14031 /* Allow ioperm/iopl access */
14032
14033 #define CAP_SYS_RAWIO 17
14034
14035 /* Allow use of chroot() */
14036
14037 #define CAP_SYS_CHROOT 18
14038
14039 /* Allow ptrace() of any process */
14040
14041 #define CAP_SYS_PTRACE 19
14042
14043 /* Allow configuration of process accounting */
14044
14045 #define CAP_SYS_PACCT 20
14046
14047 /* Allow configuration of the secure attention key */
14048 /* Allow administration of the random device */
14049 /* Allow device administration (mknod)*/
14050 /* Allow examination and configuration of disk quotas */
14051 /* Allow configuring the kernel's syslog (printk
14052 behaviour) */
14053 /* Allow sending a signal to any process */
14054 /* Allow setting the domainname */
14055 /* Allow setting the hostname */
14056 /* Allow calling bdflush() */
14057 /* Allow mount() and umount(), setting up new smb
14058 connection */
14059 /* Allow some autofs root ioctls */
14060 /* Allow nfsservctl */
14061 /* Allow VM86_REQUEST_IRQ */
14062 /* Allow to read/write pci config on alpha */
14063 /* Allow irix_prctl on mips (setstacksize) */
14064 /* Allow flushing all cache on m68k (sys_cacheflush) */
14065 /* Allow removing semaphores */
14066 /* Used instead of CAP_CHOWN to "chown" IPC message
14067 queues, semaphores and shared memory */
14068 /* Allow locking/unlocking of shared memory segment */
14069 /* Allow turning swap on/off */
14070 /* Allow forged pids on socket credentials passing */
14071 /* Allow setting readahead and flushing buffers on block
14072 devices */
14073 /* Allow setting geometry in floppy driver */
14074 /* Allow turning DMA on/off in xd driver */
14075 /* Allow administration of md devices (mostly the above,
14076 but some extra ioctls) */
14077 /* Allow tuning the ide driver */
14078 /* Allow access to the nvram device */
14079 /* Allow administration of apm_bios, serial and bttv (TV)
14080 device */
14081 /* Allow manufacturer commands in isdn CAPI support
14082 driver */
14083 /* Allow reading non-standardized portions of pci
14084 configuration space */
14085 /* Allow DDI debug ioctl on sbpcd driver */
14086 /* Allow setting up serial ports */
14087 /* Allow sending raw qic-117 commands */
14088 /* Allow enabling/disabling tagged queuing on SCSI
14089 controllers and sending arbitrary SCSI commands */
14090 /* Allow setting encryption key on loopback filesystem */
14091
14092 #define CAP_SYS_ADMIN 21
14093
14094 /* Allow use of reboot() */
14095
14096 #define CAP_SYS_BOOT 22
14097
14098 /* Allow raising priority and setting priority on other
14099 (different UID) processes */
14100 /* Allow use of FIFO and round-robin (realtime)
14101 scheduling on own processes and setting the scheduling
14102 algorithm used by another process. */
14103
14104 #define CAP_SYS_NICE 23
14105
14106 /* Override resource limits. Set resource limits. */
14107 /* Override quota limits. */
14108 /* Override reserved space on ext2 filesystem */
14109 /* NOTE: ext2 honors fsuid when checking for resource
14110 overrides, so you can override using fsuid too */
14111 /* Override size restrictions on IPC message queues */
14112 /* Allow more than 64hz interrupts from the real-time
14113 clock */
14114 /* Override max # of consoles on console allocation */
14115 /* Override max # of keymaps */
14116
14117 #define CAP_SYS_RESOURCE 24
14118
14119 /* Allow manipulation of system clock */
14120 /* Allow irix_stime on mips */
14121 /* Allow setting the real-time clock */
14122
14123 #define CAP_SYS_TIME 25
14124
14125 /* Allow configuration of tty devices */
14126 /* Allow vhangup() of tty */
14127
14128 #define CAP_SYS_TTY_CONFIG 26
14129
14130 #ifdef __KERNEL__
14131
14132 /* Internal kernel functions only */
14133
14134 #ifdef STRICT_CAP_T_TYPECHECKS
14135
14136 #define to_cap_t(x) { x }
14137 #define cap_t(x) (x).cap
14138
14139 #else
14140
14141 #define to_cap_t(x) (x)
14142 #define cap_t(x) (x)
14143
14144 #endif
14145
14146 #define CAP_EMPTY_SET to_cap_t(0)
14147 #define CAP_FULL_SET to_cap_t(~0)
14148 #define CAP_INIT_EFF_SET to_cap_t(~0 & \
14149 ~CAP_TO_MASK(CAP_SETPCAP))
14150 #define CAP_INIT_INH_SET to_cap_t(~0 & \
14151 ~CAP_TO_MASK(CAP_SETPCAP))
14152
14153 #define CAP_TO_MASK(x) (1 << (x))
14154 #define cap_raise(c, flag) \
14155 (cap_t(c) |= CAP_TO_MASK(flag))
14156 #define cap_lower(c, flag) \
14157 (cap_t(c) &= ~CAP_TO_MASK(flag))
14158 #define cap_raised(c, flag) \
14159 (cap_t(c) & CAP_TO_MASK(flag))
14160
14161 static inline kernel_cap_t cap_combine(kernel_cap_t a,
14162 kernel_cap_t b)
14163 {
14164 kernel_cap_t dest;
14165 cap_t(dest) = cap_t(a) | cap_t(b);
14166 return dest;
14167 }
14168
14169 static inline kernel_cap_t cap_intersect(kernel_cap_t a,
14170 kernel_cap_t b)
14171 {
14172 kernel_cap_t dest;
14173 cap_t(dest) = cap_t(a) & cap_t(b);
14174 return dest;
14175 }
14176
14177 static inline kernel_cap_t cap_drop(kernel_cap_t a,
14178 kernel_cap_t drop)
14179 {
14180 kernel_cap_t dest;
14181 cap_t(dest) = cap_t(a) & ~cap_t(drop);
14182 return dest;
14183 }
14184
14185 static inline kernel_cap_t cap_invert(kernel_cap_t c)
14186 {
14187 kernel_cap_t dest;
14188 cap_t(dest) = ~cap_t(c);
14189 return dest;
14190 }
14191
14192 #define cap_isclear(c) (!cap_t(c))
14193 #define cap_issubset(a,set) (!(cap_t(a) & ~cap_t(set)))
14194
14195 #define cap_clear(c) do { cap_t(c) = 0; } while(0)
14196 #define cap_set_full(c) do { cap_t(c) = ~0; } while(0)
14197 #define cap_mask(c,mask) do { cap_t(c) &= cap_t(mask);\
14198 } while(0)
14199
14200 #define cap_is_fs_cap(c) (CAP_TO_MASK(c) & CAP_FS_MASK)
14201
14202 #endif /* __KERNEL__ */
14203
14204 #endif /* !_LINUX_CAPABILITY_H */
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