362 lines
10 KiB
C
362 lines
10 KiB
C
/*
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* This is <linux/capability.h>
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*
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* Andrew G. Morgan <morgan@transmeta.com>
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* Alexander Kjeldaas <astor@guardian.no>
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* with help from Aleph1, Roland Buresund and Andrew Main.
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*
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* See here for the libcap library ("POSIX draft" compliance):
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*
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* ftp://linux.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.2/
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*/
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#ifndef _LINUX_CAPABILITY_H
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#define _LINUX_CAPABILITY_H
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#include <linux/types.h>
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#include <linux/compiler.h>
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/* User-level do most of the mapping between kernel and user
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capabilities based on the version tag given by the kernel. The
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kernel might be somewhat backwards compatible, but don't bet on
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it. */
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/* XXX - Note, cap_t, is defined by POSIX to be an "opaque" pointer to
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a set of three capability sets. The transposition of 3*the
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following structure to such a composite is better handled in a user
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library since the draft standard requires the use of malloc/free
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etc.. */
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#define _LINUX_CAPABILITY_VERSION 0x19980330
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typedef struct __user_cap_header_struct {
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__u32 version;
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int pid;
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} __user *cap_user_header_t;
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typedef struct __user_cap_data_struct {
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__u32 effective;
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__u32 permitted;
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__u32 inheritable;
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} __user *cap_user_data_t;
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#ifdef __KERNEL__
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#include <linux/spinlock.h>
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/* #define STRICT_CAP_T_TYPECHECKS */
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#ifdef STRICT_CAP_T_TYPECHECKS
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typedef struct kernel_cap_struct {
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__u32 cap;
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} kernel_cap_t;
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#else
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typedef __u32 kernel_cap_t;
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#endif
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#define _USER_CAP_HEADER_SIZE (2*sizeof(__u32))
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#define _KERNEL_CAP_T_SIZE (sizeof(kernel_cap_t))
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#endif
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/**
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** POSIX-draft defined capabilities.
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**/
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/* In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this
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overrides the restriction of changing file ownership and group
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ownership. */
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#define CAP_CHOWN 0
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/* Override all DAC access, including ACL execute access if
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[_POSIX_ACL] is defined. Excluding DAC access covered by
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CAP_LINUX_IMMUTABLE. */
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#define CAP_DAC_OVERRIDE 1
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/* Overrides all DAC restrictions regarding read and search on files
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and directories, including ACL restrictions if [_POSIX_ACL] is
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defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. */
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#define CAP_DAC_READ_SEARCH 2
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/* Overrides all restrictions about allowed operations on files, where
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file owner ID must be equal to the user ID, except where CAP_FSETID
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is applicable. It doesn't override MAC and DAC restrictions. */
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#define CAP_FOWNER 3
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/* Overrides the following restrictions that the effective user ID
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shall match the file owner ID when setting the S_ISUID and S_ISGID
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bits on that file; that the effective group ID (or one of the
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supplementary group IDs) shall match the file owner ID when setting
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the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are
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cleared on successful return from chown(2) (not implemented). */
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#define CAP_FSETID 4
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/* Used to decide between falling back on the old suser() or fsuser(). */
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#define CAP_FS_MASK 0x1f
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/* Overrides the restriction that the real or effective user ID of a
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process sending a signal must match the real or effective user ID
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of the process receiving the signal. */
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#define CAP_KILL 5
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/* Allows setgid(2) manipulation */
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/* Allows setgroups(2) */
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/* Allows forged gids on socket credentials passing. */
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#define CAP_SETGID 6
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/* Allows set*uid(2) manipulation (including fsuid). */
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/* Allows forged pids on socket credentials passing. */
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#define CAP_SETUID 7
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/**
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** Linux-specific capabilities
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**/
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/* Transfer any capability in your permitted set to any pid,
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remove any capability in your permitted set from any pid */
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#define CAP_SETPCAP 8
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/* Allow modification of S_IMMUTABLE and S_APPEND file attributes */
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#define CAP_LINUX_IMMUTABLE 9
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/* Allows binding to TCP/UDP sockets below 1024 */
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/* Allows binding to ATM VCIs below 32 */
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#define CAP_NET_BIND_SERVICE 10
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/* Allow broadcasting, listen to multicast */
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#define CAP_NET_BROADCAST 11
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/* Allow interface configuration */
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/* Allow administration of IP firewall, masquerading and accounting */
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/* Allow setting debug option on sockets */
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/* Allow modification of routing tables */
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/* Allow setting arbitrary process / process group ownership on
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sockets */
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/* Allow binding to any address for transparent proxying */
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/* Allow setting TOS (type of service) */
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/* Allow setting promiscuous mode */
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/* Allow clearing driver statistics */
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/* Allow multicasting */
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/* Allow read/write of device-specific registers */
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/* Allow activation of ATM control sockets */
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#define CAP_NET_ADMIN 12
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/* Allow use of RAW sockets */
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/* Allow use of PACKET sockets */
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#define CAP_NET_RAW 13
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/* Allow locking of shared memory segments */
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/* Allow mlock and mlockall (which doesn't really have anything to do
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with IPC) */
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#define CAP_IPC_LOCK 14
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/* Override IPC ownership checks */
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#define CAP_IPC_OWNER 15
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/* Insert and remove kernel modules - modify kernel without limit */
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/* Modify cap_bset */
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#define CAP_SYS_MODULE 16
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/* Allow ioperm/iopl access */
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/* Allow sending USB messages to any device via /proc/bus/usb */
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#define CAP_SYS_RAWIO 17
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/* Allow use of chroot() */
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#define CAP_SYS_CHROOT 18
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/* Allow ptrace() of any process */
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#define CAP_SYS_PTRACE 19
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/* Allow configuration of process accounting */
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#define CAP_SYS_PACCT 20
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/* Allow configuration of the secure attention key */
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/* Allow administration of the random device */
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/* Allow examination and configuration of disk quotas */
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/* Allow configuring the kernel's syslog (printk behaviour) */
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/* Allow setting the domainname */
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/* Allow setting the hostname */
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/* Allow calling bdflush() */
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/* Allow mount() and umount(), setting up new smb connection */
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/* Allow some autofs root ioctls */
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/* Allow nfsservctl */
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/* Allow VM86_REQUEST_IRQ */
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/* Allow to read/write pci config on alpha */
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/* Allow irix_prctl on mips (setstacksize) */
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/* Allow flushing all cache on m68k (sys_cacheflush) */
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/* Allow removing semaphores */
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/* Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores
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and shared memory */
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/* Allow locking/unlocking of shared memory segment */
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/* Allow turning swap on/off */
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/* Allow forged pids on socket credentials passing */
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/* Allow setting readahead and flushing buffers on block devices */
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/* Allow setting geometry in floppy driver */
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/* Allow turning DMA on/off in xd driver */
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/* Allow administration of md devices (mostly the above, but some
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extra ioctls) */
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/* Allow tuning the ide driver */
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/* Allow access to the nvram device */
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/* Allow administration of apm_bios, serial and bttv (TV) device */
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/* Allow manufacturer commands in isdn CAPI support driver */
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/* Allow reading non-standardized portions of pci configuration space */
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/* Allow DDI debug ioctl on sbpcd driver */
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/* Allow setting up serial ports */
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/* Allow sending raw qic-117 commands */
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/* Allow enabling/disabling tagged queuing on SCSI controllers and sending
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arbitrary SCSI commands */
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/* Allow setting encryption key on loopback filesystem */
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/* Allow setting zone reclaim policy */
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#define CAP_SYS_ADMIN 21
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/* Allow use of reboot() */
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#define CAP_SYS_BOOT 22
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/* Allow raising priority and setting priority on other (different
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UID) processes */
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/* Allow use of FIFO and round-robin (realtime) scheduling on own
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processes and setting the scheduling algorithm used by another
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process. */
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/* Allow setting cpu affinity on other processes */
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#define CAP_SYS_NICE 23
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/* Override resource limits. Set resource limits. */
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/* Override quota limits. */
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/* Override reserved space on ext2 filesystem */
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/* Modify data journaling mode on ext3 filesystem (uses journaling
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resources) */
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/* NOTE: ext2 honors fsuid when checking for resource overrides, so
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you can override using fsuid too */
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/* Override size restrictions on IPC message queues */
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/* Allow more than 64hz interrupts from the real-time clock */
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/* Override max number of consoles on console allocation */
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/* Override max number of keymaps */
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#define CAP_SYS_RESOURCE 24
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/* Allow manipulation of system clock */
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/* Allow irix_stime on mips */
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/* Allow setting the real-time clock */
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#define CAP_SYS_TIME 25
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/* Allow configuration of tty devices */
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/* Allow vhangup() of tty */
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#define CAP_SYS_TTY_CONFIG 26
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/* Allow the privileged aspects of mknod() */
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#define CAP_MKNOD 27
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/* Allow taking of leases on files */
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#define CAP_LEASE 28
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#define CAP_AUDIT_WRITE 29
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#define CAP_AUDIT_CONTROL 30
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#ifdef __KERNEL__
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/*
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* Bounding set
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*/
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extern kernel_cap_t cap_bset;
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/*
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* Internal kernel functions only
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*/
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#ifdef STRICT_CAP_T_TYPECHECKS
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#define to_cap_t(x) { x }
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#define cap_t(x) (x).cap
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#else
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#define to_cap_t(x) (x)
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#define cap_t(x) (x)
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#endif
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#define CAP_EMPTY_SET to_cap_t(0)
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#define CAP_FULL_SET to_cap_t(~0)
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#define CAP_INIT_EFF_SET to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP))
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#define CAP_INIT_INH_SET to_cap_t(0)
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#define CAP_TO_MASK(x) (1 << (x))
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#define cap_raise(c, flag) (cap_t(c) |= CAP_TO_MASK(flag))
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#define cap_lower(c, flag) (cap_t(c) &= ~CAP_TO_MASK(flag))
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#define cap_raised(c, flag) (cap_t(c) & CAP_TO_MASK(flag))
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static inline kernel_cap_t cap_combine(kernel_cap_t a, kernel_cap_t b)
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{
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kernel_cap_t dest;
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cap_t(dest) = cap_t(a) | cap_t(b);
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return dest;
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}
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static inline kernel_cap_t cap_intersect(kernel_cap_t a, kernel_cap_t b)
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{
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kernel_cap_t dest;
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cap_t(dest) = cap_t(a) & cap_t(b);
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return dest;
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}
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static inline kernel_cap_t cap_drop(kernel_cap_t a, kernel_cap_t drop)
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{
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kernel_cap_t dest;
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cap_t(dest) = cap_t(a) & ~cap_t(drop);
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return dest;
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}
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static inline kernel_cap_t cap_invert(kernel_cap_t c)
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{
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kernel_cap_t dest;
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cap_t(dest) = ~cap_t(c);
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return dest;
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}
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#define cap_isclear(c) (!cap_t(c))
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#define cap_issubset(a,set) (!(cap_t(a) & ~cap_t(set)))
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#define cap_clear(c) do { cap_t(c) = 0; } while(0)
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#define cap_set_full(c) do { cap_t(c) = ~0; } while(0)
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#define cap_mask(c,mask) do { cap_t(c) &= cap_t(mask); } while(0)
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#define cap_is_fs_cap(c) (CAP_TO_MASK(c) & CAP_FS_MASK)
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#endif /* __KERNEL__ */
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#endif /* !_LINUX_CAPABILITY_H */
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