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>
45 #include <asm/sgidefs.h>
49 #define RLIMIT_RTTIME 15
52 /* If RLIMIT_RTTIME is not defined, then we cannot use RLIMIT_NLIMITS as is */
53 #define _RLIMIT_MAX (RLIMIT_RTTIME+1 > RLIMIT_NLIMITS ? RLIMIT_RTTIME+1 : RLIMIT_NLIMITS)
55 #ifndef F_LINUX_SPECIFIC_BASE
56 #define F_LINUX_SPECIFIC_BASE 1024
60 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
64 #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
68 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
69 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
71 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
72 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
73 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
74 #define F_SEAL_WRITE 0x0008 /* prevent writes */
77 #ifndef MFD_ALLOW_SEALING
78 #define MFD_ALLOW_SEALING 0x0002U
82 #define MFD_CLOEXEC 0x0001U
86 #define IP_FREEBIND 15
89 #ifndef OOM_SCORE_ADJ_MIN
90 #define OOM_SCORE_ADJ_MIN (-1000)
93 #ifndef OOM_SCORE_ADJ_MAX
94 #define OOM_SCORE_ADJ_MAX 1000
97 #ifndef AUDIT_SERVICE_START
98 #define AUDIT_SERVICE_START 1130 /* Service (daemon) start */
101 #ifndef AUDIT_SERVICE_STOP
102 #define AUDIT_SERVICE_STOP 1131 /* Service (daemon) stop */
106 #define TIOCVHANGUP 0x5437
109 #ifndef IP_TRANSPARENT
110 #define IP_TRANSPARENT 19
114 #define SOL_NETLINK 270
117 #if !HAVE_DECL_PIVOT_ROOT
118 static inline int pivot_root(const char *new_root, const char *put_old) {
119 return syscall(SYS_pivot_root, new_root, put_old);
123 #ifndef __NR_memfd_create
124 # if defined __x86_64__
125 # define __NR_memfd_create 319
126 # elif defined __arm__
127 # define __NR_memfd_create 385
128 # elif defined _MIPS_SIM
129 # if _MIPS_SIM == _MIPS_SIM_ABI32
130 # define __NR_memfd_create 4354
132 # if _MIPS_SIM == _MIPS_SIM_NABI32
133 # define __NR_memfd_create 6318
135 # if _MIPS_SIM == _MIPS_SIM_ABI64
136 # define __NR_memfd_create 5314
139 # define __NR_memfd_create 356
143 #ifndef HAVE_MEMFD_CREATE
144 static inline int memfd_create(const char *name, unsigned int flags) {
145 return syscall(__NR_memfd_create, name, flags);
149 #ifndef __NR_getrandom
150 # if defined __x86_64__
151 # define __NR_getrandom 318
152 # elif defined(__i386__)
153 # define __NR_getrandom 355
154 # elif defined(__arm__) || defined(__aarch64__)
155 # define __NR_getrandom 384
156 # elif defined(__ia64__)
157 # define __NR_getrandom 1339
158 # elif defined(__m68k__)
159 # define __NR_getrandom 352
160 # elif defined(__s390x__)
161 # define __NR_getrandom 349
163 # warning "__NR_getrandom unknown for your architecture"
164 # define __NR_getrandom 0xffffffff
168 #if !HAVE_DECL_GETRANDOM
169 static inline int getrandom(void *buffer, size_t count, unsigned flags) {
170 return syscall(__NR_getrandom, buffer, count, flags);
174 #ifndef GRND_NONBLOCK
175 #define GRND_NONBLOCK 0x0001
179 #define GRND_RANDOM 0x0002
182 #ifndef BTRFS_IOCTL_MAGIC
183 #define BTRFS_IOCTL_MAGIC 0x94
186 #ifndef BTRFS_PATH_NAME_MAX
187 #define BTRFS_PATH_NAME_MAX 4087
190 #ifndef BTRFS_DEVICE_PATH_NAME_MAX
191 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
194 #ifndef BTRFS_FSID_SIZE
195 #define BTRFS_FSID_SIZE 16
198 #ifndef BTRFS_UUID_SIZE
199 #define BTRFS_UUID_SIZE 16
202 #ifndef HAVE_LINUX_BTRFS_H
203 struct btrfs_ioctl_vol_args {
205 char name[BTRFS_PATH_NAME_MAX + 1];
208 struct btrfs_ioctl_dev_info_args {
209 uint64_t devid; /* in/out */
210 uint8_t uuid[BTRFS_UUID_SIZE]; /* in/out */
211 uint64_t bytes_used; /* out */
212 uint64_t total_bytes; /* out */
213 uint64_t unused[379]; /* pad to 4k */
214 char path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
217 struct btrfs_ioctl_fs_info_args {
218 uint64_t max_id; /* out */
219 uint64_t num_devices; /* out */
220 uint8_t fsid[BTRFS_FSID_SIZE]; /* out */
221 uint64_t reserved[124]; /* pad to 1k */
225 #ifndef BTRFS_IOC_DEFRAG
226 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
227 struct btrfs_ioctl_vol_args)
230 #ifndef BTRFS_IOC_DEV_INFO
231 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
232 struct btrfs_ioctl_dev_info_args)
235 #ifndef BTRFS_IOC_FS_INFO
236 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
237 struct btrfs_ioctl_fs_info_args)
240 #ifndef BTRFS_IOC_DEVICES_READY
241 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
242 struct btrfs_ioctl_vol_args)
245 #ifndef BTRFS_SUPER_MAGIC
246 #define BTRFS_SUPER_MAGIC 0x9123683E
254 #define MS_PRIVATE (1 << 18)
257 #if !HAVE_DECL_GETTID
258 static inline pid_t gettid(void) {
259 return (pid_t) syscall(SYS_gettid);
264 #define SCM_SECURITY 0x03
267 #ifndef MS_STRICTATIME
268 #define MS_STRICTATIME (1<<24)
276 #define MS_SHARED (1<<20)
279 #ifndef PR_SET_NO_NEW_PRIVS
280 #define PR_SET_NO_NEW_PRIVS 38
283 #ifndef PR_SET_CHILD_SUBREAPER
284 #define PR_SET_CHILD_SUBREAPER 36
287 #ifndef MAX_HANDLE_SZ
288 #define MAX_HANDLE_SZ 128
291 #ifndef __NR_name_to_handle_at
292 # if defined(__x86_64__)
293 # define __NR_name_to_handle_at 303
294 # elif defined(__i386__)
295 # define __NR_name_to_handle_at 341
296 # elif defined(__arm__)
297 # define __NR_name_to_handle_at 370
298 # elif defined(__powerpc__)
299 # define __NR_name_to_handle_at 345
301 # error "__NR_name_to_handle_at is not defined"
305 #if !HAVE_DECL_NAME_TO_HANDLE_AT
307 unsigned int handle_bytes;
309 unsigned char f_handle[0];
312 static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
313 return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
317 #ifndef HAVE_SECURE_GETENV
318 # ifdef HAVE___SECURE_GETENV
319 # define secure_getenv __secure_getenv
321 # error "neither secure_getenv nor __secure_getenv are available"
325 #ifndef CIFS_MAGIC_NUMBER
326 # define CIFS_MAGIC_NUMBER 0xFF534D42
329 #ifndef TFD_TIMER_CANCEL_ON_SET
330 # define TFD_TIMER_CANCEL_ON_SET (1 << 1)
334 # define SO_REUSEPORT 15
338 # define EVIOCREVOKE _IOW('E', 0x91, int)
341 #ifndef DRM_IOCTL_SET_MASTER
342 # define DRM_IOCTL_SET_MASTER _IO('d', 0x1e)
345 #ifndef DRM_IOCTL_DROP_MASTER
346 # define DRM_IOCTL_DROP_MASTER _IO('d', 0x1f)
349 #if defined(__i386__) || defined(__x86_64__)
351 /* The precise definition of __O_TMPFILE is arch specific, so let's
352 * just define this on x86 where we know the value. */
355 #define __O_TMPFILE 020000000
358 /* a horrid kludge trying to make sure that this will fail on old kernels */
360 #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
366 # if defined(__x86_64__)
367 # define __NR_setns 308
368 # elif defined(__i386__)
369 # define __NR_setns 346
371 # error "__NR_setns is not defined"
376 static inline int setns(int fd, int nstype) {
377 return syscall(__NR_setns, fd, nstype);
381 #if !HAVE_DECL_LO_FLAGS_PARTSCAN
382 #define LO_FLAGS_PARTSCAN 8
385 #ifndef LOOP_CTL_REMOVE
386 #define LOOP_CTL_REMOVE 0x4C81
389 #ifndef LOOP_CTL_GET_FREE
390 #define LOOP_CTL_GET_FREE 0x4C82
393 #if !HAVE_DECL_IFLA_MACVLAN_FLAGS
394 #define IFLA_MACVLAN_UNSPEC 0
395 #define IFLA_MACVLAN_MODE 1
396 #define IFLA_MACVLAN_FLAGS 2
397 #define __IFLA_MACVLAN_MAX 3
399 #define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)
402 #if !HAVE_DECL_IFLA_VTI_REMOTE
403 #define IFLA_VTI_UNSPEC 0
404 #define IFLA_VTI_LINK 1
405 #define IFLA_VTI_IKEY 2
406 #define IFLA_VTI_OKEY 3
407 #define IFLA_VTI_LOCAL 4
408 #define IFLA_VTI_REMOTE 5
409 #define __IFLA_VTI_MAX 6
411 #define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
414 #if !HAVE_DECL_IFLA_PHYS_PORT_ID
415 #undef IFLA_PROMISCUITY
416 #define IFLA_PROMISCUITY 30
417 #define IFLA_NUM_TX_QUEUES 31
418 #define IFLA_NUM_RX_QUEUES 32
419 #define IFLA_CARRIER 33
420 #define IFLA_PHYS_PORT_ID 34
421 #define __IFLA_MAX 35
423 #define IFLA_MAX (__IFLA_MAX - 1)
426 #if !HAVE_DECL_IFLA_BOND_AD_INFO
427 #define IFLA_BOND_UNSPEC 0
428 #define IFLA_BOND_MODE 1
429 #define IFLA_BOND_ACTIVE_SLAVE 2
430 #define IFLA_BOND_MIIMON 3
431 #define IFLA_BOND_UPDELAY 4
432 #define IFLA_BOND_DOWNDELAY 5
433 #define IFLA_BOND_USE_CARRIER 6
434 #define IFLA_BOND_ARP_INTERVAL 7
435 #define IFLA_BOND_ARP_IP_TARGET 8
436 #define IFLA_BOND_ARP_VALIDATE 9
437 #define IFLA_BOND_ARP_ALL_TARGETS 10
438 #define IFLA_BOND_PRIMARY 11
439 #define IFLA_BOND_PRIMARY_RESELECT 12
440 #define IFLA_BOND_FAIL_OVER_MAC 13
441 #define IFLA_BOND_XMIT_HASH_POLICY 14
442 #define IFLA_BOND_RESEND_IGMP 15
443 #define IFLA_BOND_NUM_PEER_NOTIF 16
444 #define IFLA_BOND_ALL_SLAVES_ACTIVE 17
445 #define IFLA_BOND_MIN_LINKS 18
446 #define IFLA_BOND_LP_INTERVAL 19
447 #define IFLA_BOND_PACKETS_PER_SLAVE 20
448 #define IFLA_BOND_AD_LACP_RATE 21
449 #define IFLA_BOND_AD_SELECT 22
450 #define IFLA_BOND_AD_INFO 23
451 #define __IFLA_BOND_MAX 24
453 #define IFLA_BOND_MAX (__IFLA_BOND_MAX - 1)
456 #if !HAVE_DECL_IFLA_VLAN_PROTOCOL
457 #define IFLA_VLAN_UNSPEC 0
458 #define IFLA_VLAN_ID 1
459 #define IFLA_VLAN_FLAGS 2
460 #define IFLA_VLAN_EGRESS_QOS 3
461 #define IFLA_VLAN_INGRESS_QOS 4
462 #define IFLA_VLAN_PROTOCOL 5
463 #define __IFLA_VLAN_MAX 6
465 #define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
468 #if !HAVE_DECL_IFLA_VXLAN_LOCAL6
469 #define IFLA_VXLAN_UNSPEC 0
470 #define IFLA_VXLAN_ID 1
471 #define IFLA_VXLAN_GROUP 2
472 #define IFLA_VXLAN_LINK 3
473 #define IFLA_VXLAN_LOCAL 4
474 #define IFLA_VXLAN_TTL 5
475 #define IFLA_VXLAN_TOS 6
476 #define IFLA_VXLAN_LEARNING 7
477 #define IFLA_VXLAN_AGEING 8
478 #define IFLA_VXLAN_LIMIT 9
479 #define IFLA_VXLAN_PORT_RANGE 10
480 #define IFLA_VXLAN_PROXY 11
481 #define IFLA_VXLAN_RSC 12
482 #define IFLA_VXLAN_L2MISS 13
483 #define IFLA_VXLAN_L3MISS 14
484 #define IFLA_VXLAN_PORT 15
485 #define IFLA_VXLAN_GROUP6 16
486 #define IFLA_VXLAN_LOCAL6 17
487 #define __IFLA_VXLAN_MAX 18
489 #define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)
492 #if !HAVE_DECL_IFLA_IPTUN_6RD_RELAY_PREFIXLEN
493 #define IFLA_IPTUN_UNSPEC 0
494 #define IFLA_IPTUN_LINK 1
495 #define IFLA_IPTUN_LOCAL 2
496 #define IFLA_IPTUN_REMOTE 3
497 #define IFLA_IPTUN_TTL 4
498 #define IFLA_IPTUN_TOS 5
499 #define IFLA_IPTUN_ENCAP_LIMIT 6
500 #define IFLA_IPTUN_FLOWINFO 7
501 #define IFLA_IPTUN_FLAGS 8
502 #define IFLA_IPTUN_PROTO 9
503 #define IFLA_IPTUN_PMTUDISC 10
504 #define IFLA_IPTUN_6RD_PREFIX 11
505 #define IFLA_IPTUN_6RD_RELAY_PREFIX 12
506 #define IFLA_IPTUN_6RD_PREFIXLEN 13
507 #define IFLA_IPTUN_6RD_RELAY_PREFIXLEN 14
508 #define __IFLA_IPTUN_MAX 15
510 #define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
513 #if !HAVE_DECL_IFLA_BRIDGE_VLAN_INFO
514 #define IFLA_BRIDGE_FLAGS 0
515 #define IFLA_BRIDGE_MODE 1
516 #define IFLA_BRIDGE_VLAN_INFO 2
517 #define __IFLA_BRIDGE_MAX 3
519 #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
522 #if !HAVE_DECL_IFLA_BRPORT_UNICAST_FLOOD
523 #define IFLA_BRPORT_UNSPEC 0
524 #define IFLA_BRPORT_STATE 1
525 #define IFLA_BRPORT_PRIORITY 2
526 #define IFLA_BRPORT_COST 3
527 #define IFLA_BRPORT_MODE 4
528 #define IFLA_BRPORT_GUARD 5
529 #define IFLA_BRPORT_PROTECT 6
530 #define IFLA_BRPORT_FAST_LEAVE 7
531 #define IFLA_BRPORT_LEARNING 8
532 #define IFLA_BRPORT_UNICAST_FLOOD 9
533 #define __IFLA_BRPORT_MAX 10
535 #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
538 #ifndef IPV6_UNICAST_IF
539 #define IPV6_UNICAST_IF 76
542 #ifndef IFF_MULTI_QUEUE
543 #define IFF_MULTI_QUEUE 0x100
547 #define IFF_LOWER_UP 0x10000
551 #define IFF_DORMANT 0x20000
554 #ifndef BOND_XMIT_POLICY_ENCAP23
555 #define BOND_XMIT_POLICY_ENCAP23 3
558 #ifndef BOND_XMIT_POLICY_ENCAP34
559 #define BOND_XMIT_POLICY_ENCAP34 4
562 #ifndef NET_ADDR_RANDOM
563 # define NET_ADDR_RANDOM 1
566 #ifndef NET_NAME_ENUM
567 # define NET_NAME_ENUM 1
570 #ifndef NET_NAME_PREDICTABLE
571 # define NET_NAME_PREDICTABLE 2
574 #ifndef NET_NAME_USER
575 # define NET_NAME_USER 3
578 #ifndef NET_NAME_RENAMED
579 # define NET_NAME_RENAMED 4
583 # define BPF_XOR 0xa0
586 /* Note that LOOPBACK_IFINDEX is currently not exported by the
587 * kernel/glibc, but hardcoded internally by the kernel. However, as
588 * it is exported to userspace indirectly via rtnetlink and the
589 * ioctls, and made use of widely we define it here too, in a way that
590 * is compatible with the kernel's internal definition. */
591 #ifndef LOOPBACK_IFINDEX
592 #define LOOPBACK_IFINDEX 1
595 #ifndef MAX_AUDIT_MESSAGE_LENGTH
596 #define MAX_AUDIT_MESSAGE_LENGTH 8970
599 #ifndef AUDIT_NLGRP_MAX
600 #define AUDIT_NLGRP_READLOG 1