1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 /* Missing glibc definitions to access certain kernel APIs */
26 #include <sys/resource.h>
27 #include <sys/syscall.h>
32 #include <linux/oom.h>
33 #include <linux/input.h>
34 #include <linux/if_link.h>
35 #include <linux/loop.h>
36 #include <linux/audit.h>
37 #include <linux/capability.h>
46 #include <asm/sgidefs.h>
50 #define RLIMIT_RTTIME 15
53 /* If RLIMIT_RTTIME is not defined, then we cannot use RLIMIT_NLIMITS as is */
54 #define _RLIMIT_MAX (RLIMIT_RTTIME+1 > RLIMIT_NLIMITS ? RLIMIT_RTTIME+1 : RLIMIT_NLIMITS)
56 #ifndef F_LINUX_SPECIFIC_BASE
57 #define F_LINUX_SPECIFIC_BASE 1024
61 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
65 #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
69 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
70 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
72 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
73 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
74 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
75 #define F_SEAL_WRITE 0x0008 /* prevent writes */
78 #ifndef MFD_ALLOW_SEALING
79 #define MFD_ALLOW_SEALING 0x0002U
83 #define MFD_CLOEXEC 0x0001U
87 #define IP_FREEBIND 15
90 #ifndef OOM_SCORE_ADJ_MIN
91 #define OOM_SCORE_ADJ_MIN (-1000)
94 #ifndef OOM_SCORE_ADJ_MAX
95 #define OOM_SCORE_ADJ_MAX 1000
98 #ifndef AUDIT_SERVICE_START
99 #define AUDIT_SERVICE_START 1130 /* Service (daemon) start */
102 #ifndef AUDIT_SERVICE_STOP
103 #define AUDIT_SERVICE_STOP 1131 /* Service (daemon) stop */
107 #define TIOCVHANGUP 0x5437
110 #ifndef IP_TRANSPARENT
111 #define IP_TRANSPARENT 19
115 #define SOL_NETLINK 270
118 #if !HAVE_DECL_PIVOT_ROOT
119 static inline int pivot_root(const char *new_root, const char *put_old) {
120 return syscall(SYS_pivot_root, new_root, put_old);
124 #ifndef __NR_memfd_create
125 # if defined __x86_64__
126 # define __NR_memfd_create 319
127 # elif defined __arm__
128 # define __NR_memfd_create 385
129 # elif defined _MIPS_SIM
130 # if _MIPS_SIM == _MIPS_SIM_ABI32
131 # define __NR_memfd_create 4354
133 # if _MIPS_SIM == _MIPS_SIM_NABI32
134 # define __NR_memfd_create 6318
136 # if _MIPS_SIM == _MIPS_SIM_ABI64
137 # define __NR_memfd_create 5314
139 # elif defined __i386__
140 # define __NR_memfd_create 356
142 # warning "__NR_memfd_create unknown for your architecture"
143 # define __NR_memfd_create 0xffffffff
147 #ifndef HAVE_MEMFD_CREATE
148 static inline int memfd_create(const char *name, unsigned int flags) {
149 return syscall(__NR_memfd_create, name, flags);
153 #ifndef __NR_getrandom
154 # if defined __x86_64__
155 # define __NR_getrandom 318
156 # elif defined(__i386__)
157 # define __NR_getrandom 355
158 # elif defined(__arm__) || defined(__aarch64__)
159 # define __NR_getrandom 384
160 # elif defined(__ia64__)
161 # define __NR_getrandom 1339
162 # elif defined(__m68k__)
163 # define __NR_getrandom 352
164 # elif defined(__s390x__)
165 # define __NR_getrandom 349
167 # warning "__NR_getrandom unknown for your architecture"
168 # define __NR_getrandom 0xffffffff
172 #if !HAVE_DECL_GETRANDOM
173 static inline int getrandom(void *buffer, size_t count, unsigned flags) {
174 return syscall(__NR_getrandom, buffer, count, flags);
178 #ifndef GRND_NONBLOCK
179 #define GRND_NONBLOCK 0x0001
183 #define GRND_RANDOM 0x0002
186 #ifndef BTRFS_IOCTL_MAGIC
187 #define BTRFS_IOCTL_MAGIC 0x94
190 #ifndef BTRFS_PATH_NAME_MAX
191 #define BTRFS_PATH_NAME_MAX 4087
194 #ifndef BTRFS_DEVICE_PATH_NAME_MAX
195 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
198 #ifndef BTRFS_FSID_SIZE
199 #define BTRFS_FSID_SIZE 16
202 #ifndef BTRFS_UUID_SIZE
203 #define BTRFS_UUID_SIZE 16
206 #ifndef HAVE_LINUX_BTRFS_H
207 struct btrfs_ioctl_vol_args {
209 char name[BTRFS_PATH_NAME_MAX + 1];
212 struct btrfs_ioctl_dev_info_args {
213 uint64_t devid; /* in/out */
214 uint8_t uuid[BTRFS_UUID_SIZE]; /* in/out */
215 uint64_t bytes_used; /* out */
216 uint64_t total_bytes; /* out */
217 uint64_t unused[379]; /* pad to 4k */
218 char path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
221 struct btrfs_ioctl_fs_info_args {
222 uint64_t max_id; /* out */
223 uint64_t num_devices; /* out */
224 uint8_t fsid[BTRFS_FSID_SIZE]; /* out */
225 uint64_t reserved[124]; /* pad to 1k */
229 #ifndef BTRFS_IOC_DEFRAG
230 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
231 struct btrfs_ioctl_vol_args)
234 #ifndef BTRFS_IOC_DEV_INFO
235 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
236 struct btrfs_ioctl_dev_info_args)
239 #ifndef BTRFS_IOC_FS_INFO
240 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
241 struct btrfs_ioctl_fs_info_args)
244 #ifndef BTRFS_IOC_DEVICES_READY
245 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
246 struct btrfs_ioctl_vol_args)
249 #ifndef BTRFS_SUPER_MAGIC
250 #define BTRFS_SUPER_MAGIC 0x9123683E
258 #define MS_PRIVATE (1 << 18)
261 #if !HAVE_DECL_GETTID
262 static inline pid_t gettid(void) {
263 return (pid_t) syscall(SYS_gettid);
268 #define SCM_SECURITY 0x03
271 #ifndef MS_STRICTATIME
272 #define MS_STRICTATIME (1<<24)
280 #define MS_SHARED (1<<20)
283 #ifndef PR_SET_NO_NEW_PRIVS
284 #define PR_SET_NO_NEW_PRIVS 38
287 #ifndef PR_SET_CHILD_SUBREAPER
288 #define PR_SET_CHILD_SUBREAPER 36
291 #ifndef MAX_HANDLE_SZ
292 #define MAX_HANDLE_SZ 128
295 #ifndef __NR_name_to_handle_at
296 # if defined(__x86_64__)
297 # define __NR_name_to_handle_at 303
298 # elif defined(__i386__)
299 # define __NR_name_to_handle_at 341
300 # elif defined(__arm__)
301 # define __NR_name_to_handle_at 370
302 # elif defined(__powerpc__)
303 # define __NR_name_to_handle_at 345
305 # error "__NR_name_to_handle_at is not defined"
309 #if !HAVE_DECL_NAME_TO_HANDLE_AT
311 unsigned int handle_bytes;
313 unsigned char f_handle[0];
316 static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
317 return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
321 #ifndef HAVE_SECURE_GETENV
322 # ifdef HAVE___SECURE_GETENV
323 # define secure_getenv __secure_getenv
325 # error "neither secure_getenv nor __secure_getenv are available"
329 #ifndef CIFS_MAGIC_NUMBER
330 # define CIFS_MAGIC_NUMBER 0xFF534D42
333 #ifndef TFD_TIMER_CANCEL_ON_SET
334 # define TFD_TIMER_CANCEL_ON_SET (1 << 1)
338 # define SO_REUSEPORT 15
342 # define EVIOCREVOKE _IOW('E', 0x91, int)
345 #ifndef DRM_IOCTL_SET_MASTER
346 # define DRM_IOCTL_SET_MASTER _IO('d', 0x1e)
349 #ifndef DRM_IOCTL_DROP_MASTER
350 # define DRM_IOCTL_DROP_MASTER _IO('d', 0x1f)
353 #if defined(__i386__) || defined(__x86_64__)
355 /* The precise definition of __O_TMPFILE is arch specific, so let's
356 * just define this on x86 where we know the value. */
359 #define __O_TMPFILE 020000000
362 /* a horrid kludge trying to make sure that this will fail on old kernels */
364 #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
370 # if defined(__x86_64__)
371 # define __NR_setns 308
372 # elif defined(__i386__)
373 # define __NR_setns 346
375 # error "__NR_setns is not defined"
380 static inline int setns(int fd, int nstype) {
381 return syscall(__NR_setns, fd, nstype);
385 #if !HAVE_DECL_LO_FLAGS_PARTSCAN
386 #define LO_FLAGS_PARTSCAN 8
389 #ifndef LOOP_CTL_REMOVE
390 #define LOOP_CTL_REMOVE 0x4C81
393 #ifndef LOOP_CTL_GET_FREE
394 #define LOOP_CTL_GET_FREE 0x4C82
397 #if !HAVE_DECL_IFLA_MACVLAN_FLAGS
398 #define IFLA_MACVLAN_UNSPEC 0
399 #define IFLA_MACVLAN_MODE 1
400 #define IFLA_MACVLAN_FLAGS 2
401 #define __IFLA_MACVLAN_MAX 3
403 #define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)
406 #if !HAVE_DECL_IFLA_VTI_REMOTE
407 #define IFLA_VTI_UNSPEC 0
408 #define IFLA_VTI_LINK 1
409 #define IFLA_VTI_IKEY 2
410 #define IFLA_VTI_OKEY 3
411 #define IFLA_VTI_LOCAL 4
412 #define IFLA_VTI_REMOTE 5
413 #define __IFLA_VTI_MAX 6
415 #define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
418 #if !HAVE_DECL_IFLA_PHYS_PORT_ID
419 #undef IFLA_PROMISCUITY
420 #define IFLA_PROMISCUITY 30
421 #define IFLA_NUM_TX_QUEUES 31
422 #define IFLA_NUM_RX_QUEUES 32
423 #define IFLA_CARRIER 33
424 #define IFLA_PHYS_PORT_ID 34
425 #define __IFLA_MAX 35
427 #define IFLA_MAX (__IFLA_MAX - 1)
430 #if !HAVE_DECL_IFLA_BOND_AD_INFO
431 #define IFLA_BOND_UNSPEC 0
432 #define IFLA_BOND_MODE 1
433 #define IFLA_BOND_ACTIVE_SLAVE 2
434 #define IFLA_BOND_MIIMON 3
435 #define IFLA_BOND_UPDELAY 4
436 #define IFLA_BOND_DOWNDELAY 5
437 #define IFLA_BOND_USE_CARRIER 6
438 #define IFLA_BOND_ARP_INTERVAL 7
439 #define IFLA_BOND_ARP_IP_TARGET 8
440 #define IFLA_BOND_ARP_VALIDATE 9
441 #define IFLA_BOND_ARP_ALL_TARGETS 10
442 #define IFLA_BOND_PRIMARY 11
443 #define IFLA_BOND_PRIMARY_RESELECT 12
444 #define IFLA_BOND_FAIL_OVER_MAC 13
445 #define IFLA_BOND_XMIT_HASH_POLICY 14
446 #define IFLA_BOND_RESEND_IGMP 15
447 #define IFLA_BOND_NUM_PEER_NOTIF 16
448 #define IFLA_BOND_ALL_SLAVES_ACTIVE 17
449 #define IFLA_BOND_MIN_LINKS 18
450 #define IFLA_BOND_LP_INTERVAL 19
451 #define IFLA_BOND_PACKETS_PER_SLAVE 20
452 #define IFLA_BOND_AD_LACP_RATE 21
453 #define IFLA_BOND_AD_SELECT 22
454 #define IFLA_BOND_AD_INFO 23
455 #define __IFLA_BOND_MAX 24
457 #define IFLA_BOND_MAX (__IFLA_BOND_MAX - 1)
460 #if !HAVE_DECL_IFLA_VLAN_PROTOCOL
461 #define IFLA_VLAN_UNSPEC 0
462 #define IFLA_VLAN_ID 1
463 #define IFLA_VLAN_FLAGS 2
464 #define IFLA_VLAN_EGRESS_QOS 3
465 #define IFLA_VLAN_INGRESS_QOS 4
466 #define IFLA_VLAN_PROTOCOL 5
467 #define __IFLA_VLAN_MAX 6
469 #define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
472 #if !HAVE_DECL_IFLA_VXLAN_LOCAL6
473 #define IFLA_VXLAN_UNSPEC 0
474 #define IFLA_VXLAN_ID 1
475 #define IFLA_VXLAN_GROUP 2
476 #define IFLA_VXLAN_LINK 3
477 #define IFLA_VXLAN_LOCAL 4
478 #define IFLA_VXLAN_TTL 5
479 #define IFLA_VXLAN_TOS 6
480 #define IFLA_VXLAN_LEARNING 7
481 #define IFLA_VXLAN_AGEING 8
482 #define IFLA_VXLAN_LIMIT 9
483 #define IFLA_VXLAN_PORT_RANGE 10
484 #define IFLA_VXLAN_PROXY 11
485 #define IFLA_VXLAN_RSC 12
486 #define IFLA_VXLAN_L2MISS 13
487 #define IFLA_VXLAN_L3MISS 14
488 #define IFLA_VXLAN_PORT 15
489 #define IFLA_VXLAN_GROUP6 16
490 #define IFLA_VXLAN_LOCAL6 17
491 #define __IFLA_VXLAN_MAX 18
493 #define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)
496 #if !HAVE_DECL_IFLA_IPTUN_6RD_RELAY_PREFIXLEN
497 #define IFLA_IPTUN_UNSPEC 0
498 #define IFLA_IPTUN_LINK 1
499 #define IFLA_IPTUN_LOCAL 2
500 #define IFLA_IPTUN_REMOTE 3
501 #define IFLA_IPTUN_TTL 4
502 #define IFLA_IPTUN_TOS 5
503 #define IFLA_IPTUN_ENCAP_LIMIT 6
504 #define IFLA_IPTUN_FLOWINFO 7
505 #define IFLA_IPTUN_FLAGS 8
506 #define IFLA_IPTUN_PROTO 9
507 #define IFLA_IPTUN_PMTUDISC 10
508 #define IFLA_IPTUN_6RD_PREFIX 11
509 #define IFLA_IPTUN_6RD_RELAY_PREFIX 12
510 #define IFLA_IPTUN_6RD_PREFIXLEN 13
511 #define IFLA_IPTUN_6RD_RELAY_PREFIXLEN 14
512 #define __IFLA_IPTUN_MAX 15
514 #define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
517 #if !HAVE_DECL_IFLA_BRIDGE_VLAN_INFO
518 #define IFLA_BRIDGE_FLAGS 0
519 #define IFLA_BRIDGE_MODE 1
520 #define IFLA_BRIDGE_VLAN_INFO 2
521 #define __IFLA_BRIDGE_MAX 3
523 #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
526 #if !HAVE_DECL_IFLA_BRPORT_UNICAST_FLOOD
527 #define IFLA_BRPORT_UNSPEC 0
528 #define IFLA_BRPORT_STATE 1
529 #define IFLA_BRPORT_PRIORITY 2
530 #define IFLA_BRPORT_COST 3
531 #define IFLA_BRPORT_MODE 4
532 #define IFLA_BRPORT_GUARD 5
533 #define IFLA_BRPORT_PROTECT 6
534 #define IFLA_BRPORT_FAST_LEAVE 7
535 #define IFLA_BRPORT_LEARNING 8
536 #define IFLA_BRPORT_UNICAST_FLOOD 9
537 #define __IFLA_BRPORT_MAX 10
539 #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
542 #ifndef IPV6_UNICAST_IF
543 #define IPV6_UNICAST_IF 76
546 #ifndef IFF_MULTI_QUEUE
547 #define IFF_MULTI_QUEUE 0x100
551 #define IFF_LOWER_UP 0x10000
555 #define IFF_DORMANT 0x20000
558 #ifndef BOND_XMIT_POLICY_ENCAP23
559 #define BOND_XMIT_POLICY_ENCAP23 3
562 #ifndef BOND_XMIT_POLICY_ENCAP34
563 #define BOND_XMIT_POLICY_ENCAP34 4
566 #ifndef NET_ADDR_RANDOM
567 # define NET_ADDR_RANDOM 1
570 #ifndef NET_NAME_UNKNOWN
571 # define NET_NAME_UNKNOWN 0
574 #ifndef NET_NAME_ENUM
575 # define NET_NAME_ENUM 1
578 #ifndef NET_NAME_PREDICTABLE
579 # define NET_NAME_PREDICTABLE 2
582 #ifndef NET_NAME_USER
583 # define NET_NAME_USER 3
586 #ifndef NET_NAME_RENAMED
587 # define NET_NAME_RENAMED 4
591 # define BPF_XOR 0xa0
594 /* Note that LOOPBACK_IFINDEX is currently not exported by the
595 * kernel/glibc, but hardcoded internally by the kernel. However, as
596 * it is exported to userspace indirectly via rtnetlink and the
597 * ioctls, and made use of widely we define it here too, in a way that
598 * is compatible with the kernel's internal definition. */
599 #ifndef LOOPBACK_IFINDEX
600 #define LOOPBACK_IFINDEX 1
603 #ifndef MAX_AUDIT_MESSAGE_LENGTH
604 #define MAX_AUDIT_MESSAGE_LENGTH 8970
607 #ifndef AUDIT_NLGRP_MAX
608 #define AUDIT_NLGRP_READLOG 1
611 #ifndef CAP_MAC_OVERRIDE
612 #define CAP_MAC_OVERRIDE 32
615 #ifndef CAP_MAC_ADMIN
616 #define CAP_MAC_ADMIN 33
620 #define CAP_SYSLOG 34
623 #ifndef CAP_WAKE_ALARM
624 #define CAP_WAKE_ALARM 35
627 #ifndef CAP_BLOCK_SUSPEND
628 #define CAP_BLOCK_SUSPEND 36
631 #ifndef CAP_AUDIT_READ
632 #define CAP_AUDIT_READ 37