433 lines
13 KiB
C
433 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* This is <linux/capability.h>
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*
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* Andrew G. Morgan <morgan@kernel.org>
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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://www.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/
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*/
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#ifndef _UAPI_LINUX_CAPABILITY_H
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#define _UAPI_LINUX_CAPABILITY_H
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#include <linux/types.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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/* Note, cap_t, is defined by POSIX (draft) 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_1 0x19980330
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#define _LINUX_CAPABILITY_U32S_1 1
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#define _LINUX_CAPABILITY_VERSION_2 0x20071026 /* deprecated - use v3 */
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#define _LINUX_CAPABILITY_U32S_2 2
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#define _LINUX_CAPABILITY_VERSION_3 0x20080522
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#define _LINUX_CAPABILITY_U32S_3 2
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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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#define VFS_CAP_REVISION_MASK 0xFF000000
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#define VFS_CAP_REVISION_SHIFT 24
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#define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK
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#define VFS_CAP_FLAGS_EFFECTIVE 0x000001
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#define VFS_CAP_REVISION_1 0x01000000
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#define VFS_CAP_U32_1 1
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#define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1))
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#define VFS_CAP_REVISION_2 0x02000000
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#define VFS_CAP_U32_2 2
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#define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2))
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#define VFS_CAP_REVISION_3 0x03000000
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#define VFS_CAP_U32_3 2
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#define XATTR_CAPS_SZ_3 (sizeof(__le32)*(2 + 2*VFS_CAP_U32_3))
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#define XATTR_CAPS_SZ XATTR_CAPS_SZ_3
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#define VFS_CAP_U32 VFS_CAP_U32_3
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#define VFS_CAP_REVISION VFS_CAP_REVISION_3
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struct vfs_cap_data {
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__le32 magic_etc; /* Little endian */
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struct {
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__le32 permitted; /* Little endian */
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__le32 inheritable; /* Little endian */
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} data[VFS_CAP_U32];
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};
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/*
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* same as vfs_cap_data but with a rootid at the end
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*/
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struct vfs_ns_cap_data {
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__le32 magic_etc;
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struct {
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__le32 permitted; /* Little endian */
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__le32 inheritable; /* Little endian */
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} data[VFS_CAP_U32];
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__le32 rootid;
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};
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#ifndef __KERNEL__
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/*
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* Backwardly compatible definition for source code - trapped in a
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* 32-bit world. If you find you need this, please consider using
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* libcap to untrap yourself...
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*/
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#define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1
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#define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1
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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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/* 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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/* Without VFS support for capabilities:
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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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* With VFS support for capabilities (neither of above, but)
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* Add any capability from current's capability bounding set
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* to the current process' inheritable set
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* Allow taking bits out of capability bounding set
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* Allow modification of the securebits for a process
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*/
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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 (also via NET_RAW) */
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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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/* Allow binding to any address for transparent proxying (also via NET_ADMIN) */
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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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#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 /dev/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 setting the domainname */
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/* Allow setting the hostname */
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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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/* Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility */
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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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/* Allow setting realtime ioprio class */
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/* Allow setting ioprio class 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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/* Control memory reclaim behavior */
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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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/* Allow writing the audit log via unicast netlink socket */
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#define CAP_AUDIT_WRITE 29
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/* Allow configuration of audit via unicast netlink socket */
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#define CAP_AUDIT_CONTROL 30
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/* Set or remove capabilities on files.
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Map uid=0 into a child user namespace. */
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#define CAP_SETFCAP 31
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/* Override MAC access.
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The base kernel enforces no MAC policy.
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An LSM may enforce a MAC policy, and if it does and it chooses
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to implement capability based overrides of that policy, this is
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the capability it should use to do so. */
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#define CAP_MAC_OVERRIDE 32
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/* Allow MAC configuration or state changes.
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The base kernel requires no MAC configuration.
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An LSM may enforce a MAC policy, and if it does and it chooses
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to implement capability based checks on modifications to that
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policy or the data required to maintain it, this is the
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capability it should use to do so. */
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#define CAP_MAC_ADMIN 33
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/* Allow configuring the kernel's syslog (printk behaviour) */
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#define CAP_SYSLOG 34
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/* Allow triggering something that will wake the system */
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#define CAP_WAKE_ALARM 35
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/* Allow preventing system suspends */
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#define CAP_BLOCK_SUSPEND 36
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/* Allow reading the audit log via multicast netlink socket */
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#define CAP_AUDIT_READ 37
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/*
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* Allow system performance and observability privileged operations
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* using perf_events, i915_perf and other kernel subsystems
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*/
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#define CAP_PERFMON 38
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/*
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* CAP_BPF allows the following BPF operations:
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* - Creating all types of BPF maps
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* - Advanced verifier features
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* - Indirect variable access
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* - Bounded loops
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* - BPF to BPF function calls
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* - Scalar precision tracking
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* - Larger complexity limits
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* - Dead code elimination
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* - And potentially other features
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* - Loading BPF Type Format (BTF) data
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* - Retrieve xlated and JITed code of BPF programs
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* - Use bpf_spin_lock() helper
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*
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* CAP_PERFMON relaxes the verifier checks further:
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* - BPF progs can use of pointer-to-integer conversions
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* - speculation attack hardening measures are bypassed
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* - bpf_probe_read to read arbitrary kernel memory is allowed
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* - bpf_trace_printk to print kernel memory is allowed
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*
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* CAP_SYS_ADMIN is required to use bpf_probe_write_user.
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*
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* CAP_SYS_ADMIN is required to iterate system wide loaded
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* programs, maps, links, BTFs and convert their IDs to file descriptors.
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*
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* CAP_PERFMON and CAP_BPF are required to load tracing programs.
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* CAP_NET_ADMIN and CAP_BPF are required to load networking programs.
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*/
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#define CAP_BPF 39
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/* Allow checkpoint/restore related operations */
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/* Allow PID selection during clone3() */
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/* Allow writing to ns_last_pid */
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#define CAP_CHECKPOINT_RESTORE 40
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#define CAP_LAST_CAP CAP_CHECKPOINT_RESTORE
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#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
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/*
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* Bit location of each capability (used by user-space library and kernel)
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*/
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#define CAP_TO_INDEX(x) ((x) >> 5) /* 1 << 5 == bits in __u32 */
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#define CAP_TO_MASK(x) (1U << ((x) & 31)) /* mask for indexed __u32 */
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#endif /* _UAPI_LINUX_CAPABILITY_H */
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