a5f0359600
We can simplify our code quite a bit if we explicitly check for the ifindex being 1 on Linux as a loopback check. Apparently, this is hardcoded on Linux on the kernel, and effectively exported to userspace via rtnl and such, hence we should be able to rely on it.
539 lines
12 KiB
C
539 lines
12 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
#pragma once
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
/* Missing glibc definitions to access certain kernel APIs */
|
|
|
|
#include <sys/resource.h>
|
|
#include <sys/syscall.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <linux/oom.h>
|
|
#include <linux/input.h>
|
|
#include <linux/if_link.h>
|
|
#include <linux/loop.h>
|
|
|
|
#ifdef HAVE_AUDIT
|
|
#include <libaudit.h>
|
|
#endif
|
|
|
|
#include "macro.h"
|
|
|
|
#ifdef ARCH_MIPS
|
|
#include <asm/sgidefs.h>
|
|
#endif
|
|
|
|
#ifndef RLIMIT_RTTIME
|
|
#define RLIMIT_RTTIME 15
|
|
#endif
|
|
|
|
/* If RLIMIT_RTTIME is not defined, then we cannot use RLIMIT_NLIMITS as is */
|
|
#define _RLIMIT_MAX (RLIMIT_RTTIME+1 > RLIMIT_NLIMITS ? RLIMIT_RTTIME+1 : RLIMIT_NLIMITS)
|
|
|
|
#ifndef F_LINUX_SPECIFIC_BASE
|
|
#define F_LINUX_SPECIFIC_BASE 1024
|
|
#endif
|
|
|
|
#ifndef F_SETPIPE_SZ
|
|
#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
|
|
#endif
|
|
|
|
#ifndef F_GETPIPE_SZ
|
|
#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
|
|
#endif
|
|
|
|
#ifndef F_ADD_SEALS
|
|
#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
|
|
#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
|
|
|
|
#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
|
|
#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
|
|
#define F_SEAL_GROW 0x0004 /* prevent file from growing */
|
|
#define F_SEAL_WRITE 0x0008 /* prevent writes */
|
|
#endif
|
|
|
|
#ifndef MFD_ALLOW_SEALING
|
|
#define MFD_ALLOW_SEALING 0x0002ULL
|
|
#endif
|
|
|
|
#ifndef IP_FREEBIND
|
|
#define IP_FREEBIND 15
|
|
#endif
|
|
|
|
#ifndef OOM_SCORE_ADJ_MIN
|
|
#define OOM_SCORE_ADJ_MIN (-1000)
|
|
#endif
|
|
|
|
#ifndef OOM_SCORE_ADJ_MAX
|
|
#define OOM_SCORE_ADJ_MAX 1000
|
|
#endif
|
|
|
|
#ifndef AUDIT_SERVICE_START
|
|
#define AUDIT_SERVICE_START 1130 /* Service (daemon) start */
|
|
#endif
|
|
|
|
#ifndef AUDIT_SERVICE_STOP
|
|
#define AUDIT_SERVICE_STOP 1131 /* Service (daemon) stop */
|
|
#endif
|
|
|
|
#ifndef TIOCVHANGUP
|
|
#define TIOCVHANGUP 0x5437
|
|
#endif
|
|
|
|
#ifndef IP_TRANSPARENT
|
|
#define IP_TRANSPARENT 19
|
|
#endif
|
|
|
|
#ifndef SOL_NETLINK
|
|
#define SOL_NETLINK 270
|
|
#endif
|
|
|
|
#if !HAVE_DECL_PIVOT_ROOT
|
|
static inline int pivot_root(const char *new_root, const char *put_old) {
|
|
return syscall(SYS_pivot_root, new_root, put_old);
|
|
}
|
|
#endif
|
|
|
|
#ifdef __x86_64__
|
|
# ifndef __NR_memfd_create
|
|
# define __NR_memfd_create 319
|
|
# endif
|
|
#elif defined __arm__
|
|
# ifndef __NR_memfd_create
|
|
# define __NR_memfd_create 385
|
|
# endif
|
|
#elif defined _MIPS_SIM
|
|
# ifndef __NR_memfd_create
|
|
# warning "__NR_memfd_create not yet defined for MIPS"
|
|
# define __NR_memfd_create 0xffffffff
|
|
# endif
|
|
#else
|
|
# ifndef __NR_memfd_create
|
|
# define __NR_memfd_create 356
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef HAVE_MEMFD_CREATE
|
|
static inline int memfd_create(const char *name, unsigned int flags) {
|
|
return syscall(__NR_memfd_create, name, flags);
|
|
}
|
|
#endif
|
|
|
|
#ifndef BTRFS_IOCTL_MAGIC
|
|
#define BTRFS_IOCTL_MAGIC 0x94
|
|
#endif
|
|
|
|
#ifndef BTRFS_PATH_NAME_MAX
|
|
#define BTRFS_PATH_NAME_MAX 4087
|
|
#endif
|
|
|
|
#ifndef BTRFS_DEVICE_PATH_NAME_MAX
|
|
#define BTRFS_DEVICE_PATH_NAME_MAX 1024
|
|
#endif
|
|
|
|
#ifndef BTRFS_FSID_SIZE
|
|
#define BTRFS_FSID_SIZE 16
|
|
#endif
|
|
|
|
#ifndef BTRFS_UUID_SIZE
|
|
#define BTRFS_UUID_SIZE 16
|
|
#endif
|
|
|
|
#ifndef HAVE_LINUX_BTRFS_H
|
|
struct btrfs_ioctl_vol_args {
|
|
int64_t fd;
|
|
char name[BTRFS_PATH_NAME_MAX + 1];
|
|
};
|
|
|
|
struct btrfs_ioctl_dev_info_args {
|
|
uint64_t devid; /* in/out */
|
|
uint8_t uuid[BTRFS_UUID_SIZE]; /* in/out */
|
|
uint64_t bytes_used; /* out */
|
|
uint64_t total_bytes; /* out */
|
|
uint64_t unused[379]; /* pad to 4k */
|
|
char path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
|
|
};
|
|
|
|
struct btrfs_ioctl_fs_info_args {
|
|
uint64_t max_id; /* out */
|
|
uint64_t num_devices; /* out */
|
|
uint8_t fsid[BTRFS_FSID_SIZE]; /* out */
|
|
uint64_t reserved[124]; /* pad to 1k */
|
|
};
|
|
#endif
|
|
|
|
#ifndef BTRFS_IOC_DEFRAG
|
|
#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
|
|
struct btrfs_ioctl_vol_args)
|
|
#endif
|
|
|
|
#ifndef BTRFS_IOC_DEV_INFO
|
|
#define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
|
|
struct btrfs_ioctl_dev_info_args)
|
|
#endif
|
|
|
|
#ifndef BTRFS_IOC_FS_INFO
|
|
#define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
|
|
struct btrfs_ioctl_fs_info_args)
|
|
#endif
|
|
|
|
#ifndef BTRFS_IOC_DEVICES_READY
|
|
#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
|
|
struct btrfs_ioctl_vol_args)
|
|
#endif
|
|
|
|
#ifndef BTRFS_SUPER_MAGIC
|
|
#define BTRFS_SUPER_MAGIC 0x9123683E
|
|
#endif
|
|
|
|
#ifndef MS_MOVE
|
|
#define MS_MOVE 8192
|
|
#endif
|
|
|
|
#ifndef MS_PRIVATE
|
|
#define MS_PRIVATE (1 << 18)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_GETTID
|
|
static inline pid_t gettid(void) {
|
|
return (pid_t) syscall(SYS_gettid);
|
|
}
|
|
#endif
|
|
|
|
#ifndef SCM_SECURITY
|
|
#define SCM_SECURITY 0x03
|
|
#endif
|
|
|
|
#ifndef MS_STRICTATIME
|
|
#define MS_STRICTATIME (1<<24)
|
|
#endif
|
|
|
|
#ifndef MS_REC
|
|
#define MS_REC 16384
|
|
#endif
|
|
|
|
#ifndef MS_SHARED
|
|
#define MS_SHARED (1<<20)
|
|
#endif
|
|
|
|
#ifndef PR_SET_NO_NEW_PRIVS
|
|
#define PR_SET_NO_NEW_PRIVS 38
|
|
#endif
|
|
|
|
#ifndef PR_SET_CHILD_SUBREAPER
|
|
#define PR_SET_CHILD_SUBREAPER 36
|
|
#endif
|
|
|
|
#ifndef MAX_HANDLE_SZ
|
|
#define MAX_HANDLE_SZ 128
|
|
#endif
|
|
|
|
#ifndef __NR_name_to_handle_at
|
|
# if defined(__x86_64__)
|
|
# define __NR_name_to_handle_at 303
|
|
# elif defined(__i386__)
|
|
# define __NR_name_to_handle_at 341
|
|
# elif defined(__arm__)
|
|
# define __NR_name_to_handle_at 370
|
|
# elif defined(__powerpc__)
|
|
# define __NR_name_to_handle_at 345
|
|
# else
|
|
# error "__NR_name_to_handle_at is not defined"
|
|
# endif
|
|
#endif
|
|
|
|
#if !HAVE_DECL_NAME_TO_HANDLE_AT
|
|
struct file_handle {
|
|
unsigned int handle_bytes;
|
|
int handle_type;
|
|
unsigned char f_handle[0];
|
|
};
|
|
|
|
static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
|
|
return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_SECURE_GETENV
|
|
# ifdef HAVE___SECURE_GETENV
|
|
# define secure_getenv __secure_getenv
|
|
# else
|
|
# error "neither secure_getenv nor __secure_getenv are available"
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef CIFS_MAGIC_NUMBER
|
|
# define CIFS_MAGIC_NUMBER 0xFF534D42
|
|
#endif
|
|
|
|
#ifndef TFD_TIMER_CANCEL_ON_SET
|
|
# define TFD_TIMER_CANCEL_ON_SET (1 << 1)
|
|
#endif
|
|
|
|
#ifndef SO_REUSEPORT
|
|
# define SO_REUSEPORT 15
|
|
#endif
|
|
|
|
#ifndef EVIOCREVOKE
|
|
# define EVIOCREVOKE _IOW('E', 0x91, int)
|
|
#endif
|
|
|
|
#ifndef DRM_IOCTL_SET_MASTER
|
|
# define DRM_IOCTL_SET_MASTER _IO('d', 0x1e)
|
|
#endif
|
|
|
|
#ifndef DRM_IOCTL_DROP_MASTER
|
|
# define DRM_IOCTL_DROP_MASTER _IO('d', 0x1f)
|
|
#endif
|
|
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
|
|
/* The precise definition of __O_TMPFILE is arch specific, so let's
|
|
* just define this on x86 where we know the value. */
|
|
|
|
#ifndef __O_TMPFILE
|
|
#define __O_TMPFILE 020000000
|
|
#endif
|
|
|
|
/* a horrid kludge trying to make sure that this will fail on old kernels */
|
|
#ifndef O_TMPFILE
|
|
#define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#ifndef __NR_setns
|
|
# if defined(__x86_64__)
|
|
# define __NR_setns 308
|
|
# elif defined(__i386__)
|
|
# define __NR_setns 346
|
|
# else
|
|
# error "__NR_setns is not defined"
|
|
# endif
|
|
#endif
|
|
|
|
#if !HAVE_DECL_SETNS
|
|
static inline int setns(int fd, int nstype) {
|
|
return syscall(__NR_setns, fd, nstype);
|
|
}
|
|
#endif
|
|
|
|
#if !HAVE_DECL_LO_FLAGS_PARTSCAN
|
|
#define LO_FLAGS_PARTSCAN 8
|
|
#endif
|
|
|
|
#ifndef LOOP_CTL_REMOVE
|
|
#define LOOP_CTL_REMOVE 0x4C81
|
|
#endif
|
|
|
|
#ifndef LOOP_CTL_GET_FREE
|
|
#define LOOP_CTL_GET_FREE 0x4C82
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_MACVLAN_FLAGS
|
|
#define IFLA_MACVLAN_UNSPEC 0
|
|
#define IFLA_MACVLAN_MODE 1
|
|
#define IFLA_MACVLAN_FLAGS 2
|
|
#define __IFLA_MACVLAN_MAX 3
|
|
|
|
#define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_VTI_REMOTE
|
|
#define IFLA_VTI_UNSPEC 0
|
|
#define IFLA_VTI_LINK 1
|
|
#define IFLA_VTI_IKEY 2
|
|
#define IFLA_VTI_OKEY 3
|
|
#define IFLA_VTI_LOCAL 4
|
|
#define IFLA_VTI_REMOTE 5
|
|
#define __IFLA_VTI_MAX 6
|
|
|
|
#define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_PHYS_PORT_ID
|
|
#undef IFLA_PROMISCUITY
|
|
#define IFLA_PROMISCUITY 30
|
|
#define IFLA_NUM_TX_QUEUES 31
|
|
#define IFLA_NUM_RX_QUEUES 32
|
|
#define IFLA_CARRIER 33
|
|
#define IFLA_PHYS_PORT_ID 34
|
|
#define __IFLA_MAX 35
|
|
|
|
#define IFLA_MAX (__IFLA_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_BOND_AD_INFO
|
|
#define IFLA_BOND_UNSPEC 0
|
|
#define IFLA_BOND_MODE 1
|
|
#define IFLA_BOND_ACTIVE_SLAVE 2
|
|
#define IFLA_BOND_MIIMON 3
|
|
#define IFLA_BOND_UPDELAY 4
|
|
#define IFLA_BOND_DOWNDELAY 5
|
|
#define IFLA_BOND_USE_CARRIER 6
|
|
#define IFLA_BOND_ARP_INTERVAL 7
|
|
#define IFLA_BOND_ARP_IP_TARGET 8
|
|
#define IFLA_BOND_ARP_VALIDATE 9
|
|
#define IFLA_BOND_ARP_ALL_TARGETS 10
|
|
#define IFLA_BOND_PRIMARY 11
|
|
#define IFLA_BOND_PRIMARY_RESELECT 12
|
|
#define IFLA_BOND_FAIL_OVER_MAC 13
|
|
#define IFLA_BOND_XMIT_HASH_POLICY 14
|
|
#define IFLA_BOND_RESEND_IGMP 15
|
|
#define IFLA_BOND_NUM_PEER_NOTIF 16
|
|
#define IFLA_BOND_ALL_SLAVES_ACTIVE 17
|
|
#define IFLA_BOND_MIN_LINKS 18
|
|
#define IFLA_BOND_LP_INTERVAL 19
|
|
#define IFLA_BOND_PACKETS_PER_SLAVE 20
|
|
#define IFLA_BOND_AD_LACP_RATE 21
|
|
#define IFLA_BOND_AD_SELECT 22
|
|
#define IFLA_BOND_AD_INFO 23
|
|
#define __IFLA_BOND_MAX 24
|
|
|
|
#define IFLA_BOND_MAX (__IFLA_BOND_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_VLAN_PROTOCOL
|
|
#define IFLA_VLAN_UNSPEC 0
|
|
#define IFLA_VLAN_ID 1
|
|
#define IFLA_VLAN_FLAGS 2
|
|
#define IFLA_VLAN_EGRESS_QOS 3
|
|
#define IFLA_VLAN_INGRESS_QOS 4
|
|
#define IFLA_VLAN_PROTOCOL 5
|
|
#define __IFLA_VLAN_MAX 6
|
|
|
|
#define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_VXLAN_LOCAL6
|
|
#define IFLA_VXLAN_UNSPEC 0
|
|
#define IFLA_VXLAN_ID 1
|
|
#define IFLA_VXLAN_GROUP 2
|
|
#define IFLA_VXLAN_LINK 3
|
|
#define IFLA_VXLAN_LOCAL 4
|
|
#define IFLA_VXLAN_TTL 5
|
|
#define IFLA_VXLAN_TOS 6
|
|
#define IFLA_VXLAN_LEARNING 7
|
|
#define IFLA_VXLAN_AGEING 8
|
|
#define IFLA_VXLAN_LIMIT 9
|
|
#define IFLA_VXLAN_PORT_RANGE 10
|
|
#define IFLA_VXLAN_PROXY 11
|
|
#define IFLA_VXLAN_RSC 12
|
|
#define IFLA_VXLAN_L2MISS 13
|
|
#define IFLA_VXLAN_L3MISS 14
|
|
#define IFLA_VXLAN_PORT 15
|
|
#define IFLA_VXLAN_GROUP6 16
|
|
#define IFLA_VXLAN_LOCAL6 17
|
|
#define __IFLA_VXLAN_MAX 18
|
|
|
|
#define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_IPTUN_6RD_RELAY_PREFIXLEN
|
|
#define IFLA_IPTUN_UNSPEC 0
|
|
#define IFLA_IPTUN_LINK 1
|
|
#define IFLA_IPTUN_LOCAL 2
|
|
#define IFLA_IPTUN_REMOTE 3
|
|
#define IFLA_IPTUN_TTL 4
|
|
#define IFLA_IPTUN_TOS 5
|
|
#define IFLA_IPTUN_ENCAP_LIMIT 6
|
|
#define IFLA_IPTUN_FLOWINFO 7
|
|
#define IFLA_IPTUN_FLAGS 8
|
|
#define IFLA_IPTUN_PROTO 9
|
|
#define IFLA_IPTUN_PMTUDISC 10
|
|
#define IFLA_IPTUN_6RD_PREFIX 11
|
|
#define IFLA_IPTUN_6RD_RELAY_PREFIX 12
|
|
#define IFLA_IPTUN_6RD_PREFIXLEN 13
|
|
#define IFLA_IPTUN_6RD_RELAY_PREFIXLEN 14
|
|
#define __IFLA_IPTUN_MAX 15
|
|
|
|
#define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
|
|
#endif
|
|
|
|
#if !HAVE_DECL_IFLA_BRIDGE_VLAN_INFO
|
|
#define IFLA_BRIDGE_FLAGS 0
|
|
#define IFLA_BRIDGE_MODE 1
|
|
#define IFLA_BRIDGE_VLAN_INFO 2
|
|
#define __IFLA_BRIDGE_MAX 3
|
|
|
|
#define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
|
|
#endif
|
|
|
|
#ifndef IPV6_UNICAST_IF
|
|
#define IPV6_UNICAST_IF 76
|
|
#endif
|
|
|
|
#ifndef IFF_MULTI_QUEUE
|
|
#define IFF_MULTI_QUEUE 0x100
|
|
#endif
|
|
|
|
#ifndef IFF_LOWER_UP
|
|
#define IFF_LOWER_UP 0x10000
|
|
#endif
|
|
|
|
#ifndef IFF_DORMANT
|
|
#define IFF_DORMANT 0x20000
|
|
#endif
|
|
|
|
#ifndef BOND_XMIT_POLICY_ENCAP23
|
|
#define BOND_XMIT_POLICY_ENCAP23 3
|
|
#endif
|
|
|
|
#ifndef BOND_XMIT_POLICY_ENCAP34
|
|
#define BOND_XMIT_POLICY_ENCAP34 4
|
|
#endif
|
|
|
|
#ifndef NET_ADDR_RANDOM
|
|
# define NET_ADDR_RANDOM 1
|
|
#endif
|
|
|
|
#ifndef NET_NAME_ENUM
|
|
# define NET_NAME_ENUM 1
|
|
#endif
|
|
|
|
#ifndef NET_NAME_PREDICTABLE
|
|
# define NET_NAME_PREDICTABLE 2
|
|
#endif
|
|
|
|
#ifndef NET_NAME_USER
|
|
# define NET_NAME_USER 3
|
|
#endif
|
|
|
|
#ifndef NET_NAME_RENAMED
|
|
# define NET_NAME_RENAMED 4
|
|
#endif
|
|
|
|
#ifndef BPF_XOR
|
|
# define BPF_XOR 0xa0
|
|
#endif
|
|
|
|
/* Note that LOOPBACK_IFINDEX is currently not exported by the
|
|
* kernel/glibc, but hardcoded internally by the kernel. However, as
|
|
* it is exported to userspace indirectly via rtnetlink and the
|
|
* ioctls, and made use of widely we define it here too, in a way that
|
|
* is compatible with the kernel's internal definition. */
|
|
#ifndef LOOPBACK_IFINDEX
|
|
#define LOOPBACK_IFINDEX 1
|
|
#endif
|