a8af734e75
add networkd/nspawn nftables backend
5604 lines
237 KiB
C
5604 lines
237 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#if HAVE_BLKID
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#endif
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#include <errno.h>
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#include <getopt.h>
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#include <linux/fs.h>
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#include <linux/loop.h>
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#if HAVE_SELINUX
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#include <selinux/selinux.h>
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#endif
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#include <stdlib.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <sys/personality.h>
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#include <sys/prctl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <termios.h>
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#include <unistd.h>
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#include "sd-bus.h"
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#include "sd-daemon.h"
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#include "sd-id128.h"
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#include "alloc-util.h"
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#include "barrier.h"
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#include "base-filesystem.h"
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#include "blkid-util.h"
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#include "btrfs-util.h"
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#include "bus-error.h"
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#include "bus-util.h"
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#include "cap-list.h"
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#include "capability-util.h"
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#include "cgroup-util.h"
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#include "copy.h"
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#include "cpu-set-util.h"
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#include "dev-setup.h"
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#include "dissect-image.h"
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#include "env-util.h"
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#include "escape.h"
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#include "fd-util.h"
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#include "fdset.h"
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#include "fileio.h"
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#include "format-util.h"
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#include "fs-util.h"
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#include "gpt.h"
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#include "hexdecoct.h"
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#include "hostname-setup.h"
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#include "hostname-util.h"
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#include "id128-util.h"
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#include "io-util.h"
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#include "log.h"
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#include "loop-util.h"
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#include "loopback-setup.h"
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#include "machine-image.h"
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#include "macro.h"
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#include "main-func.h"
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#include "missing_sched.h"
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#include "mkdir.h"
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#include "mount-util.h"
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#include "mountpoint-util.h"
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#include "namespace-util.h"
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#include "netlink-util.h"
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#include "nspawn-cgroup.h"
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#include "nspawn-creds.h"
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#include "nspawn-def.h"
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#include "nspawn-expose-ports.h"
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#include "nspawn-mount.h"
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#include "nspawn-network.h"
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#include "nspawn-oci.h"
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#include "nspawn-patch-uid.h"
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#include "nspawn-register.h"
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#include "nspawn-seccomp.h"
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#include "nspawn-settings.h"
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#include "nspawn-setuid.h"
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#include "nspawn-stub-pid1.h"
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#include "nulstr-util.h"
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#include "os-util.h"
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#include "pager.h"
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#include "parse-util.h"
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#include "path-util.h"
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#include "pretty-print.h"
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#include "process-util.h"
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#include "ptyfwd.h"
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#include "random-util.h"
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#include "raw-clone.h"
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#include "resolve-util.h"
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#include "rlimit-util.h"
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#include "rm-rf.h"
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#if HAVE_SECCOMP
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#include "seccomp-util.h"
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#endif
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#include "selinux-util.h"
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#include "signal-util.h"
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#include "socket-util.h"
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#include "stat-util.h"
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#include "stdio-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#include "sysctl-util.h"
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#include "terminal-util.h"
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#include "tmpfile-util.h"
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#include "umask-util.h"
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#include "unit-name.h"
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#include "user-util.h"
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#include "util.h"
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/* The notify socket inside the container it can use to talk to nspawn using the sd_notify(3) protocol */
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#define NSPAWN_NOTIFY_SOCKET_PATH "/run/host/notify"
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#define EXIT_FORCE_RESTART 133
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typedef enum ContainerStatus {
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CONTAINER_TERMINATED,
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CONTAINER_REBOOTED,
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} ContainerStatus;
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static char *arg_directory = NULL;
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static char *arg_template = NULL;
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static char *arg_chdir = NULL;
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static char *arg_pivot_root_new = NULL;
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static char *arg_pivot_root_old = NULL;
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static char *arg_user = NULL;
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static uid_t arg_uid = UID_INVALID;
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static gid_t arg_gid = GID_INVALID;
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static gid_t* arg_supplementary_gids = NULL;
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static size_t arg_n_supplementary_gids = 0;
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static sd_id128_t arg_uuid = {};
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static char *arg_machine = NULL; /* The name used by the host to refer to this */
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static char *arg_hostname = NULL; /* The name the payload sees by default */
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static const char *arg_selinux_context = NULL;
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static const char *arg_selinux_apifs_context = NULL;
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static char *arg_slice = NULL;
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static bool arg_private_network = false;
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static bool arg_read_only = false;
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static StartMode arg_start_mode = START_PID1;
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static bool arg_ephemeral = false;
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static LinkJournal arg_link_journal = LINK_AUTO;
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static bool arg_link_journal_try = false;
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static uint64_t arg_caps_retain =
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(1ULL << CAP_AUDIT_CONTROL) |
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(1ULL << CAP_AUDIT_WRITE) |
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(1ULL << CAP_CHOWN) |
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(1ULL << CAP_DAC_OVERRIDE) |
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(1ULL << CAP_DAC_READ_SEARCH) |
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(1ULL << CAP_FOWNER) |
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(1ULL << CAP_FSETID) |
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(1ULL << CAP_IPC_OWNER) |
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(1ULL << CAP_KILL) |
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(1ULL << CAP_LEASE) |
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(1ULL << CAP_LINUX_IMMUTABLE) |
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(1ULL << CAP_MKNOD) |
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(1ULL << CAP_NET_BIND_SERVICE) |
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(1ULL << CAP_NET_BROADCAST) |
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(1ULL << CAP_NET_RAW) |
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(1ULL << CAP_SETFCAP) |
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(1ULL << CAP_SETGID) |
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(1ULL << CAP_SETPCAP) |
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(1ULL << CAP_SETUID) |
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(1ULL << CAP_SYS_ADMIN) |
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(1ULL << CAP_SYS_BOOT) |
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(1ULL << CAP_SYS_CHROOT) |
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(1ULL << CAP_SYS_NICE) |
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(1ULL << CAP_SYS_PTRACE) |
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(1ULL << CAP_SYS_RESOURCE) |
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(1ULL << CAP_SYS_TTY_CONFIG);
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static uint64_t arg_caps_ambient = 0;
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static CapabilityQuintet arg_full_capabilities = CAPABILITY_QUINTET_NULL;
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static CustomMount *arg_custom_mounts = NULL;
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static size_t arg_n_custom_mounts = 0;
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static char **arg_setenv = NULL;
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static bool arg_quiet = false;
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static bool arg_register = true;
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static bool arg_keep_unit = false;
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static char **arg_network_interfaces = NULL;
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static char **arg_network_macvlan = NULL;
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static char **arg_network_ipvlan = NULL;
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static bool arg_network_veth = false;
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static char **arg_network_veth_extra = NULL;
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static char *arg_network_bridge = NULL;
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static char *arg_network_zone = NULL;
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static char *arg_network_namespace_path = NULL;
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static PagerFlags arg_pager_flags = 0;
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static unsigned long arg_personality = PERSONALITY_INVALID;
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static char *arg_image = NULL;
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static char *arg_oci_bundle = NULL;
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static VolatileMode arg_volatile_mode = VOLATILE_NO;
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static ExposePort *arg_expose_ports = NULL;
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static char **arg_property = NULL;
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static sd_bus_message *arg_property_message = NULL;
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static UserNamespaceMode arg_userns_mode = USER_NAMESPACE_NO;
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static uid_t arg_uid_shift = UID_INVALID, arg_uid_range = 0x10000U;
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static bool arg_userns_chown = false;
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static int arg_kill_signal = 0;
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static CGroupUnified arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_UNKNOWN;
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static SettingsMask arg_settings_mask = 0;
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static int arg_settings_trusted = -1;
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static char **arg_parameters = NULL;
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static const char *arg_container_service_name = "systemd-nspawn";
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static bool arg_notify_ready = false;
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static bool arg_use_cgns = true;
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static unsigned long arg_clone_ns_flags = CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWUTS;
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static MountSettingsMask arg_mount_settings = MOUNT_APPLY_APIVFS_RO|MOUNT_APPLY_TMPFS_TMP;
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static VeritySettings arg_verity_settings = VERITY_SETTINGS_DEFAULT;
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static char **arg_syscall_allow_list = NULL;
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static char **arg_syscall_deny_list = NULL;
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#if HAVE_SECCOMP
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static scmp_filter_ctx arg_seccomp = NULL;
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#endif
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static struct rlimit *arg_rlimit[_RLIMIT_MAX] = {};
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static bool arg_no_new_privileges = false;
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static int arg_oom_score_adjust = 0;
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static bool arg_oom_score_adjust_set = false;
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static CPUSet arg_cpu_set = {};
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static ResolvConfMode arg_resolv_conf = RESOLV_CONF_AUTO;
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static TimezoneMode arg_timezone = TIMEZONE_AUTO;
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static unsigned arg_console_width = (unsigned) -1, arg_console_height = (unsigned) -1;
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static DeviceNode* arg_extra_nodes = NULL;
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static size_t arg_n_extra_nodes = 0;
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static char **arg_sysctl = NULL;
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static ConsoleMode arg_console_mode = _CONSOLE_MODE_INVALID;
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static Credential *arg_credentials = NULL;
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static size_t arg_n_credentials = 0;
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STATIC_DESTRUCTOR_REGISTER(arg_directory, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_template, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_chdir, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_pivot_root_new, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_pivot_root_old, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_user, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_supplementary_gids, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_machine, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_hostname, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_slice, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_setenv, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_interfaces, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_macvlan, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_ipvlan, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_veth_extra, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_bridge, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_zone, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_network_namespace_path, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_oci_bundle, freep);
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STATIC_DESTRUCTOR_REGISTER(arg_property, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_property_message, sd_bus_message_unrefp);
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STATIC_DESTRUCTOR_REGISTER(arg_parameters, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_verity_settings, verity_settings_done);
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STATIC_DESTRUCTOR_REGISTER(arg_syscall_allow_list, strv_freep);
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STATIC_DESTRUCTOR_REGISTER(arg_syscall_deny_list, strv_freep);
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#if HAVE_SECCOMP
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STATIC_DESTRUCTOR_REGISTER(arg_seccomp, seccomp_releasep);
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#endif
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STATIC_DESTRUCTOR_REGISTER(arg_cpu_set, cpu_set_reset);
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STATIC_DESTRUCTOR_REGISTER(arg_sysctl, strv_freep);
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static int handle_arg_console(const char *arg) {
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if (streq(arg, "help")) {
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puts("autopipe\n"
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"interactive\n"
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"passive\n"
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"pipe\n"
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"read-only");
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return 0;
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}
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if (streq(arg, "interactive"))
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arg_console_mode = CONSOLE_INTERACTIVE;
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else if (streq(arg, "read-only"))
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arg_console_mode = CONSOLE_READ_ONLY;
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else if (streq(arg, "passive"))
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arg_console_mode = CONSOLE_PASSIVE;
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else if (streq(arg, "pipe")) {
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if (isatty(STDIN_FILENO) > 0 && isatty(STDOUT_FILENO) > 0)
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log_full(arg_quiet ? LOG_DEBUG : LOG_NOTICE,
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"Console mode 'pipe' selected, but standard input/output are connected to an interactive TTY. "
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"Most likely you want to use 'interactive' console mode for proper interactivity and shell job control. "
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"Proceeding anyway.");
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arg_console_mode = CONSOLE_PIPE;
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} else if (streq(arg, "autopipe")) {
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if (isatty(STDIN_FILENO) > 0 && isatty(STDOUT_FILENO) > 0)
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arg_console_mode = CONSOLE_INTERACTIVE;
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else
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arg_console_mode = CONSOLE_PIPE;
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} else
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown console mode: %s", optarg);
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arg_settings_mask |= SETTING_CONSOLE_MODE;
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return 1;
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}
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static int help(void) {
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_cleanup_free_ char *link = NULL;
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int r;
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(void) pager_open(arg_pager_flags);
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r = terminal_urlify_man("systemd-nspawn", "1", &link);
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if (r < 0)
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return log_oom();
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printf("%1$s [OPTIONS...] [PATH] [ARGUMENTS...]\n\n"
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"%5$sSpawn a command or OS in a light-weight container.%6$s\n\n"
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" -h --help Show this help\n"
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" --version Print version string\n"
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" -q --quiet Do not show status information\n"
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" --no-pager Do not pipe output into a pager\n"
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" --settings=BOOLEAN Load additional settings from .nspawn file\n\n"
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"%3$sImage:%4$s\n"
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" -D --directory=PATH Root directory for the container\n"
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" --template=PATH Initialize root directory from template directory,\n"
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" if missing\n"
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" -x --ephemeral Run container with snapshot of root directory, and\n"
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" remove it after exit\n"
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" -i --image=PATH Root file system disk image (or device node) for\n"
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" the container\n"
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" --oci-bundle=PATH OCI bundle directory\n"
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" --read-only Mount the root directory read-only\n"
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" --volatile[=MODE] Run the system in volatile mode\n"
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" --root-hash=HASH Specify verity root hash for root disk image\n"
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" --root-hash-sig=SIG Specify pkcs7 signature of root hash for verity\n"
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" as a DER encoded PKCS7, either as a path to a file\n"
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" or as an ASCII base64 encoded string prefixed by\n"
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" 'base64:'\n"
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" --verity-data=PATH Specify hash device for verity\n"
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" --pivot-root=PATH[:PATH]\n"
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" Pivot root to given directory in the container\n\n"
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"%3$sExecution:%4$s\n"
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" -a --as-pid2 Maintain a stub init as PID1, invoke binary as PID2\n"
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" -b --boot Boot up full system (i.e. invoke init)\n"
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" --chdir=PATH Set working directory in the container\n"
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" -E --setenv=NAME=VALUE Pass an environment variable to PID 1\n"
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" -u --user=USER Run the command under specified user or UID\n"
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" --kill-signal=SIGNAL Select signal to use for shutting down PID 1\n"
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" --notify-ready=BOOLEAN Receive notifications from the child init process\n\n"
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"%3$sSystem Identity:%4$s\n"
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" -M --machine=NAME Set the machine name for the container\n"
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" --hostname=NAME Override the hostname for the container\n"
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" --uuid=UUID Set a specific machine UUID for the container\n\n"
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"%3$sProperties:%4$s\n"
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" -S --slice=SLICE Place the container in the specified slice\n"
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" --property=NAME=VALUE Set scope unit property\n"
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" --register=BOOLEAN Register container as machine\n"
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" --keep-unit Do not register a scope for the machine, reuse\n"
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" the service unit nspawn is running in\n\n"
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"%3$sUser Namespacing:%4$s\n"
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" -U --private-users=pick Run within user namespace, autoselect UID/GID range\n"
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" --private-users[=UIDBASE[:NUIDS]]\n"
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" Similar, but with user configured UID/GID range\n"
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" --private-users-chown Adjust OS tree ownership to private UID/GID range\n\n"
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"%3$sNetworking:%4$s\n"
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" --private-network Disable network in container\n"
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" --network-interface=INTERFACE\n"
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" Assign an existing network interface to the\n"
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" container\n"
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" --network-macvlan=INTERFACE\n"
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" Create a macvlan network interface based on an\n"
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" existing network interface to the container\n"
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" --network-ipvlan=INTERFACE\n"
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" Create a ipvlan network interface based on an\n"
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" existing network interface to the container\n"
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" -n --network-veth Add a virtual Ethernet connection between host\n"
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" and container\n"
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" --network-veth-extra=HOSTIF[:CONTAINERIF]\n"
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" Add an additional virtual Ethernet link between\n"
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" host and container\n"
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" --network-bridge=INTERFACE\n"
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" Add a virtual Ethernet connection to the container\n"
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" and attach it to an existing bridge on the host\n"
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" --network-zone=NAME Similar, but attach the new interface to an\n"
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" an automatically managed bridge interface\n"
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" --network-namespace-path=PATH\n"
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" Set network namespace to the one represented by\n"
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" the specified kernel namespace file node\n"
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" -p --port=[PROTOCOL:]HOSTPORT[:CONTAINERPORT]\n"
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" Expose a container IP port on the host\n\n"
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"%3$sSecurity:%4$s\n"
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" --capability=CAP In addition to the default, retain specified\n"
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" capability\n"
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" --drop-capability=CAP Drop the specified capability from the default set\n"
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" --ambient-capability=CAP\n"
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" Sets the specified capability for the started\n"
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" process. Not useful if booting a machine.\n"
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" --no-new-privileges Set PR_SET_NO_NEW_PRIVS flag for container payload\n"
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" --system-call-filter=LIST|~LIST\n"
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" Permit/prohibit specific system calls\n"
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" -Z --selinux-context=SECLABEL\n"
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" Set the SELinux security context to be used by\n"
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" processes in the container\n"
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" -L --selinux-apifs-context=SECLABEL\n"
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" Set the SELinux security context to be used by\n"
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" API/tmpfs file systems in the container\n\n"
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"%3$sResources:%4$s\n"
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" --rlimit=NAME=LIMIT Set a resource limit for the payload\n"
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" --oom-score-adjust=VALUE\n"
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" Adjust the OOM score value for the payload\n"
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" --cpu-affinity=CPUS Adjust the CPU affinity of the container\n"
|
|
" --personality=ARCH Pick personality for this container\n\n"
|
|
"%3$sIntegration:%4$s\n"
|
|
" --resolv-conf=MODE Select mode of /etc/resolv.conf initialization\n"
|
|
" --timezone=MODE Select mode of /etc/localtime initialization\n"
|
|
" --link-journal=MODE Link up guest journal, one of no, auto, guest, \n"
|
|
" host, try-guest, try-host\n"
|
|
" -j Equivalent to --link-journal=try-guest\n\n"
|
|
"%3$sMounts:%4$s\n"
|
|
" --bind=PATH[:PATH[:OPTIONS]]\n"
|
|
" Bind mount a file or directory from the host into\n"
|
|
" the container\n"
|
|
" --bind-ro=PATH[:PATH[:OPTIONS]\n"
|
|
" Similar, but creates a read-only bind mount\n"
|
|
" --inaccessible=PATH Over-mount file node with inaccessible node to mask\n"
|
|
" it\n"
|
|
" --tmpfs=PATH:[OPTIONS] Mount an empty tmpfs to the specified directory\n"
|
|
" --overlay=PATH[:PATH...]:PATH\n"
|
|
" Create an overlay mount from the host to \n"
|
|
" the container\n"
|
|
" --overlay-ro=PATH[:PATH...]:PATH\n"
|
|
" Similar, but creates a read-only overlay mount\n\n"
|
|
"%3$sInput/Output:%4$s\n"
|
|
" --console=MODE Select how stdin/stdout/stderr and /dev/console are\n"
|
|
" set up for the container.\n"
|
|
" -P --pipe Equivalent to --console=pipe\n\n"
|
|
"%3$sCredentials:%4$s\n"
|
|
" --set-credential=ID:VALUE\n"
|
|
" Pass a credential with literal value to container.\n"
|
|
" --load-credential=ID:PATH\n"
|
|
" Load credential to pass to container from file or\n"
|
|
" AF_UNIX stream socket.\n"
|
|
"\nSee the %2$s for details.\n"
|
|
, program_invocation_short_name
|
|
, link
|
|
, ansi_underline(), ansi_normal()
|
|
, ansi_highlight(), ansi_normal()
|
|
);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int custom_mount_check_all(void) {
|
|
size_t i;
|
|
|
|
for (i = 0; i < arg_n_custom_mounts; i++) {
|
|
CustomMount *m = &arg_custom_mounts[i];
|
|
|
|
if (path_equal(m->destination, "/") && arg_userns_mode != USER_NAMESPACE_NO) {
|
|
if (arg_userns_chown)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--private-users-chown may not be combined with custom root mounts.");
|
|
else if (arg_uid_shift == UID_INVALID)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--private-users with automatic UID shift may not be combined with custom root mounts.");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int detect_unified_cgroup_hierarchy_from_environment(void) {
|
|
const char *e, *var = "SYSTEMD_NSPAWN_UNIFIED_HIERARCHY";
|
|
int r;
|
|
|
|
/* Allow the user to control whether the unified hierarchy is used */
|
|
|
|
e = getenv(var);
|
|
if (!e) {
|
|
/* $UNIFIED_CGROUP_HIERARCHY has been renamed to $SYSTEMD_NSPAWN_UNIFIED_HIERARCHY. */
|
|
var = "UNIFIED_CGROUP_HIERARCHY";
|
|
e = getenv(var);
|
|
}
|
|
|
|
if (!isempty(e)) {
|
|
r = parse_boolean(e);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse $%s: %m", var);
|
|
if (r > 0)
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_ALL;
|
|
else
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int detect_unified_cgroup_hierarchy_from_image(const char *directory) {
|
|
int r;
|
|
|
|
/* Let's inherit the mode to use from the host system, but let's take into consideration what systemd
|
|
* in the image actually supports. */
|
|
r = cg_all_unified();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine whether we are in all unified mode.");
|
|
if (r > 0) {
|
|
/* Unified cgroup hierarchy support was added in 230. Unfortunately the detection
|
|
* routine only detects 231, so we'll have a false negative here for 230. */
|
|
r = systemd_installation_has_version(directory, 230);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine systemd version in container: %m");
|
|
if (r > 0)
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_ALL;
|
|
else
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
|
|
} else if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0) {
|
|
/* Mixed cgroup hierarchy support was added in 233 */
|
|
r = systemd_installation_has_version(directory, 233);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine systemd version in container: %m");
|
|
if (r > 0)
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_SYSTEMD;
|
|
else
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
|
|
} else
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
|
|
|
|
log_debug("Using %s hierarchy for container.",
|
|
arg_unified_cgroup_hierarchy == CGROUP_UNIFIED_NONE ? "legacy" :
|
|
arg_unified_cgroup_hierarchy == CGROUP_UNIFIED_SYSTEMD ? "hybrid" : "unified");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_capability_spec(const char *spec, uint64_t *ret_mask) {
|
|
uint64_t mask = 0;
|
|
int r;
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *t = NULL;
|
|
|
|
r = extract_first_word(&spec, &t, ",", 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse capability %s.", t);
|
|
if (r == 0)
|
|
break;
|
|
|
|
if (streq(t, "help")) {
|
|
for (int i = 0; i < capability_list_length(); i++) {
|
|
const char *name;
|
|
|
|
name = capability_to_name(i);
|
|
if (name)
|
|
puts(name);
|
|
}
|
|
|
|
return 0; /* quit */
|
|
}
|
|
|
|
if (streq(t, "all"))
|
|
mask = (uint64_t) -1;
|
|
else {
|
|
r = capability_from_name(t);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse capability %s.", t);
|
|
|
|
mask |= 1ULL << r;
|
|
}
|
|
}
|
|
|
|
*ret_mask = mask;
|
|
return 1; /* continue */
|
|
}
|
|
|
|
static int parse_share_ns_env(const char *name, unsigned long ns_flag) {
|
|
int r;
|
|
|
|
r = getenv_bool(name);
|
|
if (r == -ENXIO)
|
|
return 0;
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse $%s: %m", name);
|
|
|
|
arg_clone_ns_flags = (arg_clone_ns_flags & ~ns_flag) | (r > 0 ? 0 : ns_flag);
|
|
arg_settings_mask |= SETTING_CLONE_NS_FLAGS;
|
|
return 0;
|
|
}
|
|
|
|
static int parse_mount_settings_env(void) {
|
|
const char *e;
|
|
int r;
|
|
|
|
r = getenv_bool("SYSTEMD_NSPAWN_TMPFS_TMP");
|
|
if (r < 0 && r != -ENXIO)
|
|
return log_error_errno(r, "Failed to parse $SYSTEMD_NSPAWN_TMPFS_TMP: %m");
|
|
if (r >= 0)
|
|
SET_FLAG(arg_mount_settings, MOUNT_APPLY_TMPFS_TMP, r > 0);
|
|
|
|
e = getenv("SYSTEMD_NSPAWN_API_VFS_WRITABLE");
|
|
if (streq_ptr(e, "network"))
|
|
arg_mount_settings |= MOUNT_APPLY_APIVFS_RO|MOUNT_APPLY_APIVFS_NETNS;
|
|
|
|
else if (e) {
|
|
r = parse_boolean(e);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse $SYSTEMD_NSPAWN_API_VFS_WRITABLE: %m");
|
|
|
|
SET_FLAG(arg_mount_settings, MOUNT_APPLY_APIVFS_RO, r == 0);
|
|
SET_FLAG(arg_mount_settings, MOUNT_APPLY_APIVFS_NETNS, false);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_environment(void) {
|
|
const char *e;
|
|
int r;
|
|
|
|
r = parse_share_ns_env("SYSTEMD_NSPAWN_SHARE_NS_IPC", CLONE_NEWIPC);
|
|
if (r < 0)
|
|
return r;
|
|
r = parse_share_ns_env("SYSTEMD_NSPAWN_SHARE_NS_PID", CLONE_NEWPID);
|
|
if (r < 0)
|
|
return r;
|
|
r = parse_share_ns_env("SYSTEMD_NSPAWN_SHARE_NS_UTS", CLONE_NEWUTS);
|
|
if (r < 0)
|
|
return r;
|
|
r = parse_share_ns_env("SYSTEMD_NSPAWN_SHARE_SYSTEM", CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWUTS);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = parse_mount_settings_env();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* SYSTEMD_NSPAWN_USE_CGNS=0 can be used to disable CLONE_NEWCGROUP use,
|
|
* even if it is supported. If not supported, it has no effect. */
|
|
if (!cg_ns_supported())
|
|
arg_use_cgns = false;
|
|
else {
|
|
r = getenv_bool("SYSTEMD_NSPAWN_USE_CGNS");
|
|
if (r < 0) {
|
|
if (r != -ENXIO)
|
|
return log_error_errno(r, "Failed to parse $SYSTEMD_NSPAWN_USE_CGNS: %m");
|
|
|
|
arg_use_cgns = true;
|
|
} else {
|
|
arg_use_cgns = r > 0;
|
|
arg_settings_mask |= SETTING_USE_CGNS;
|
|
}
|
|
}
|
|
|
|
e = getenv("SYSTEMD_NSPAWN_CONTAINER_SERVICE");
|
|
if (e)
|
|
arg_container_service_name = e;
|
|
|
|
return detect_unified_cgroup_hierarchy_from_environment();
|
|
}
|
|
|
|
static int parse_argv(int argc, char *argv[]) {
|
|
enum {
|
|
ARG_VERSION = 0x100,
|
|
ARG_PRIVATE_NETWORK,
|
|
ARG_UUID,
|
|
ARG_READ_ONLY,
|
|
ARG_CAPABILITY,
|
|
ARG_AMBIENT_CAPABILITY,
|
|
ARG_DROP_CAPABILITY,
|
|
ARG_LINK_JOURNAL,
|
|
ARG_BIND,
|
|
ARG_BIND_RO,
|
|
ARG_TMPFS,
|
|
ARG_OVERLAY,
|
|
ARG_OVERLAY_RO,
|
|
ARG_INACCESSIBLE,
|
|
ARG_SHARE_SYSTEM,
|
|
ARG_REGISTER,
|
|
ARG_KEEP_UNIT,
|
|
ARG_NETWORK_INTERFACE,
|
|
ARG_NETWORK_MACVLAN,
|
|
ARG_NETWORK_IPVLAN,
|
|
ARG_NETWORK_BRIDGE,
|
|
ARG_NETWORK_ZONE,
|
|
ARG_NETWORK_VETH_EXTRA,
|
|
ARG_NETWORK_NAMESPACE_PATH,
|
|
ARG_PERSONALITY,
|
|
ARG_VOLATILE,
|
|
ARG_TEMPLATE,
|
|
ARG_PROPERTY,
|
|
ARG_PRIVATE_USERS,
|
|
ARG_KILL_SIGNAL,
|
|
ARG_SETTINGS,
|
|
ARG_CHDIR,
|
|
ARG_PIVOT_ROOT,
|
|
ARG_PRIVATE_USERS_CHOWN,
|
|
ARG_NOTIFY_READY,
|
|
ARG_ROOT_HASH,
|
|
ARG_ROOT_HASH_SIG,
|
|
ARG_VERITY_DATA,
|
|
ARG_SYSTEM_CALL_FILTER,
|
|
ARG_RLIMIT,
|
|
ARG_HOSTNAME,
|
|
ARG_NO_NEW_PRIVILEGES,
|
|
ARG_OOM_SCORE_ADJUST,
|
|
ARG_CPU_AFFINITY,
|
|
ARG_RESOLV_CONF,
|
|
ARG_TIMEZONE,
|
|
ARG_CONSOLE,
|
|
ARG_PIPE,
|
|
ARG_OCI_BUNDLE,
|
|
ARG_NO_PAGER,
|
|
ARG_SET_CREDENTIAL,
|
|
ARG_LOAD_CREDENTIAL,
|
|
};
|
|
|
|
static const struct option options[] = {
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "version", no_argument, NULL, ARG_VERSION },
|
|
{ "directory", required_argument, NULL, 'D' },
|
|
{ "template", required_argument, NULL, ARG_TEMPLATE },
|
|
{ "ephemeral", no_argument, NULL, 'x' },
|
|
{ "user", required_argument, NULL, 'u' },
|
|
{ "private-network", no_argument, NULL, ARG_PRIVATE_NETWORK },
|
|
{ "as-pid2", no_argument, NULL, 'a' },
|
|
{ "boot", no_argument, NULL, 'b' },
|
|
{ "uuid", required_argument, NULL, ARG_UUID },
|
|
{ "read-only", no_argument, NULL, ARG_READ_ONLY },
|
|
{ "capability", required_argument, NULL, ARG_CAPABILITY },
|
|
{ "ambient-capability", required_argument, NULL, ARG_AMBIENT_CAPABILITY },
|
|
{ "drop-capability", required_argument, NULL, ARG_DROP_CAPABILITY },
|
|
{ "no-new-privileges", required_argument, NULL, ARG_NO_NEW_PRIVILEGES },
|
|
{ "link-journal", required_argument, NULL, ARG_LINK_JOURNAL },
|
|
{ "bind", required_argument, NULL, ARG_BIND },
|
|
{ "bind-ro", required_argument, NULL, ARG_BIND_RO },
|
|
{ "tmpfs", required_argument, NULL, ARG_TMPFS },
|
|
{ "overlay", required_argument, NULL, ARG_OVERLAY },
|
|
{ "overlay-ro", required_argument, NULL, ARG_OVERLAY_RO },
|
|
{ "inaccessible", required_argument, NULL, ARG_INACCESSIBLE },
|
|
{ "machine", required_argument, NULL, 'M' },
|
|
{ "hostname", required_argument, NULL, ARG_HOSTNAME },
|
|
{ "slice", required_argument, NULL, 'S' },
|
|
{ "setenv", required_argument, NULL, 'E' },
|
|
{ "selinux-context", required_argument, NULL, 'Z' },
|
|
{ "selinux-apifs-context", required_argument, NULL, 'L' },
|
|
{ "quiet", no_argument, NULL, 'q' },
|
|
{ "share-system", no_argument, NULL, ARG_SHARE_SYSTEM }, /* not documented */
|
|
{ "register", required_argument, NULL, ARG_REGISTER },
|
|
{ "keep-unit", no_argument, NULL, ARG_KEEP_UNIT },
|
|
{ "network-interface", required_argument, NULL, ARG_NETWORK_INTERFACE },
|
|
{ "network-macvlan", required_argument, NULL, ARG_NETWORK_MACVLAN },
|
|
{ "network-ipvlan", required_argument, NULL, ARG_NETWORK_IPVLAN },
|
|
{ "network-veth", no_argument, NULL, 'n' },
|
|
{ "network-veth-extra", required_argument, NULL, ARG_NETWORK_VETH_EXTRA },
|
|
{ "network-bridge", required_argument, NULL, ARG_NETWORK_BRIDGE },
|
|
{ "network-zone", required_argument, NULL, ARG_NETWORK_ZONE },
|
|
{ "network-namespace-path", required_argument, NULL, ARG_NETWORK_NAMESPACE_PATH },
|
|
{ "personality", required_argument, NULL, ARG_PERSONALITY },
|
|
{ "image", required_argument, NULL, 'i' },
|
|
{ "volatile", optional_argument, NULL, ARG_VOLATILE },
|
|
{ "port", required_argument, NULL, 'p' },
|
|
{ "property", required_argument, NULL, ARG_PROPERTY },
|
|
{ "private-users", optional_argument, NULL, ARG_PRIVATE_USERS },
|
|
{ "private-users-chown", optional_argument, NULL, ARG_PRIVATE_USERS_CHOWN },
|
|
{ "kill-signal", required_argument, NULL, ARG_KILL_SIGNAL },
|
|
{ "settings", required_argument, NULL, ARG_SETTINGS },
|
|
{ "chdir", required_argument, NULL, ARG_CHDIR },
|
|
{ "pivot-root", required_argument, NULL, ARG_PIVOT_ROOT },
|
|
{ "notify-ready", required_argument, NULL, ARG_NOTIFY_READY },
|
|
{ "root-hash", required_argument, NULL, ARG_ROOT_HASH },
|
|
{ "root-hash-sig", required_argument, NULL, ARG_ROOT_HASH_SIG },
|
|
{ "verity-data", required_argument, NULL, ARG_VERITY_DATA },
|
|
{ "system-call-filter", required_argument, NULL, ARG_SYSTEM_CALL_FILTER },
|
|
{ "rlimit", required_argument, NULL, ARG_RLIMIT },
|
|
{ "oom-score-adjust", required_argument, NULL, ARG_OOM_SCORE_ADJUST },
|
|
{ "cpu-affinity", required_argument, NULL, ARG_CPU_AFFINITY },
|
|
{ "resolv-conf", required_argument, NULL, ARG_RESOLV_CONF },
|
|
{ "timezone", required_argument, NULL, ARG_TIMEZONE },
|
|
{ "console", required_argument, NULL, ARG_CONSOLE },
|
|
{ "pipe", no_argument, NULL, ARG_PIPE },
|
|
{ "oci-bundle", required_argument, NULL, ARG_OCI_BUNDLE },
|
|
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
|
|
{ "set-credential", required_argument, NULL, ARG_SET_CREDENTIAL },
|
|
{ "load-credential", required_argument, NULL, ARG_LOAD_CREDENTIAL },
|
|
{}
|
|
};
|
|
|
|
int c, r;
|
|
uint64_t plus = 0, minus = 0;
|
|
bool mask_all_settings = false, mask_no_settings = false;
|
|
|
|
assert(argc >= 0);
|
|
assert(argv);
|
|
|
|
while ((c = getopt_long(argc, argv, "+hD:u:abL:M:jS:Z:qi:xp:nUE:P", options, NULL)) >= 0)
|
|
switch (c) {
|
|
|
|
case 'h':
|
|
return help();
|
|
|
|
case ARG_VERSION:
|
|
return version();
|
|
|
|
case 'D':
|
|
r = parse_path_argument_and_warn(optarg, false, &arg_directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
arg_settings_mask |= SETTING_DIRECTORY;
|
|
break;
|
|
|
|
case ARG_TEMPLATE:
|
|
r = parse_path_argument_and_warn(optarg, false, &arg_template);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
arg_settings_mask |= SETTING_DIRECTORY;
|
|
break;
|
|
|
|
case 'i':
|
|
r = parse_path_argument_and_warn(optarg, false, &arg_image);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
arg_settings_mask |= SETTING_DIRECTORY;
|
|
break;
|
|
|
|
case ARG_OCI_BUNDLE:
|
|
r = parse_path_argument_and_warn(optarg, false, &arg_oci_bundle);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
break;
|
|
|
|
case 'x':
|
|
arg_ephemeral = true;
|
|
arg_settings_mask |= SETTING_EPHEMERAL;
|
|
break;
|
|
|
|
case 'u':
|
|
r = free_and_strdup(&arg_user, optarg);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
arg_settings_mask |= SETTING_USER;
|
|
break;
|
|
|
|
case ARG_NETWORK_ZONE: {
|
|
char *j;
|
|
|
|
j = strjoin("vz-", optarg);
|
|
if (!j)
|
|
return log_oom();
|
|
|
|
if (!ifname_valid(j)) {
|
|
log_error("Network zone name not valid: %s", j);
|
|
free(j);
|
|
return -EINVAL;
|
|
}
|
|
|
|
free_and_replace(arg_network_zone, j);
|
|
|
|
arg_network_veth = true;
|
|
arg_private_network = true;
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
}
|
|
|
|
case ARG_NETWORK_BRIDGE:
|
|
|
|
if (!ifname_valid(optarg))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Bridge interface name not valid: %s", optarg);
|
|
|
|
r = free_and_strdup(&arg_network_bridge, optarg);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
_fallthrough_;
|
|
case 'n':
|
|
arg_network_veth = true;
|
|
arg_private_network = true;
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
|
|
case ARG_NETWORK_VETH_EXTRA:
|
|
r = veth_extra_parse(&arg_network_veth_extra, optarg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --network-veth-extra= parameter: %s", optarg);
|
|
|
|
arg_private_network = true;
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
|
|
case ARG_NETWORK_INTERFACE:
|
|
if (!ifname_valid(optarg))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Network interface name not valid: %s", optarg);
|
|
|
|
r = test_network_interface_initialized(optarg);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (strv_extend(&arg_network_interfaces, optarg) < 0)
|
|
return log_oom();
|
|
|
|
arg_private_network = true;
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
|
|
case ARG_NETWORK_MACVLAN:
|
|
|
|
if (!ifname_valid(optarg))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"MACVLAN network interface name not valid: %s", optarg);
|
|
|
|
r = test_network_interface_initialized(optarg);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (strv_extend(&arg_network_macvlan, optarg) < 0)
|
|
return log_oom();
|
|
|
|
arg_private_network = true;
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
|
|
case ARG_NETWORK_IPVLAN:
|
|
|
|
if (!ifname_valid(optarg))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"IPVLAN network interface name not valid: %s", optarg);
|
|
|
|
r = test_network_interface_initialized(optarg);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (strv_extend(&arg_network_ipvlan, optarg) < 0)
|
|
return log_oom();
|
|
|
|
_fallthrough_;
|
|
case ARG_PRIVATE_NETWORK:
|
|
arg_private_network = true;
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
|
|
case ARG_NETWORK_NAMESPACE_PATH:
|
|
r = parse_path_argument_and_warn(optarg, false, &arg_network_namespace_path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
arg_settings_mask |= SETTING_NETWORK;
|
|
break;
|
|
|
|
case 'b':
|
|
if (arg_start_mode == START_PID2)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--boot and --as-pid2 may not be combined.");
|
|
|
|
arg_start_mode = START_BOOT;
|
|
arg_settings_mask |= SETTING_START_MODE;
|
|
break;
|
|
|
|
case 'a':
|
|
if (arg_start_mode == START_BOOT)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--boot and --as-pid2 may not be combined.");
|
|
|
|
arg_start_mode = START_PID2;
|
|
arg_settings_mask |= SETTING_START_MODE;
|
|
break;
|
|
|
|
case ARG_UUID:
|
|
r = sd_id128_from_string(optarg, &arg_uuid);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Invalid UUID: %s", optarg);
|
|
|
|
if (sd_id128_is_null(arg_uuid))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Machine UUID may not be all zeroes.");
|
|
|
|
arg_settings_mask |= SETTING_MACHINE_ID;
|
|
break;
|
|
|
|
case 'S': {
|
|
_cleanup_free_ char *mangled = NULL;
|
|
|
|
r = unit_name_mangle_with_suffix(optarg, NULL, UNIT_NAME_MANGLE_WARN, ".slice", &mangled);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
free_and_replace(arg_slice, mangled);
|
|
arg_settings_mask |= SETTING_SLICE;
|
|
break;
|
|
}
|
|
|
|
case 'M':
|
|
if (isempty(optarg))
|
|
arg_machine = mfree(arg_machine);
|
|
else {
|
|
if (!hostname_is_valid(optarg, 0))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Invalid machine name: %s", optarg);
|
|
|
|
r = free_and_strdup(&arg_machine, optarg);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
break;
|
|
|
|
case ARG_HOSTNAME:
|
|
if (isempty(optarg))
|
|
arg_hostname = mfree(arg_hostname);
|
|
else {
|
|
if (!hostname_is_valid(optarg, 0))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Invalid hostname: %s", optarg);
|
|
|
|
r = free_and_strdup(&arg_hostname, optarg);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
arg_settings_mask |= SETTING_HOSTNAME;
|
|
break;
|
|
|
|
case 'Z':
|
|
arg_selinux_context = optarg;
|
|
break;
|
|
|
|
case 'L':
|
|
arg_selinux_apifs_context = optarg;
|
|
break;
|
|
|
|
case ARG_READ_ONLY:
|
|
arg_read_only = true;
|
|
arg_settings_mask |= SETTING_READ_ONLY;
|
|
break;
|
|
|
|
case ARG_AMBIENT_CAPABILITY: {
|
|
uint64_t m;
|
|
r = parse_capability_spec(optarg, &m);
|
|
if (r <= 0)
|
|
return r;
|
|
arg_caps_ambient |= m;
|
|
arg_settings_mask |= SETTING_CAPABILITY;
|
|
break;
|
|
}
|
|
case ARG_CAPABILITY:
|
|
case ARG_DROP_CAPABILITY: {
|
|
uint64_t m;
|
|
r = parse_capability_spec(optarg, &m);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
if (c == ARG_CAPABILITY)
|
|
plus |= m;
|
|
else
|
|
minus |= m;
|
|
arg_settings_mask |= SETTING_CAPABILITY;
|
|
break;
|
|
}
|
|
case ARG_NO_NEW_PRIVILEGES:
|
|
r = parse_boolean(optarg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --no-new-privileges= argument: %s", optarg);
|
|
|
|
arg_no_new_privileges = r;
|
|
arg_settings_mask |= SETTING_NO_NEW_PRIVILEGES;
|
|
break;
|
|
|
|
case 'j':
|
|
arg_link_journal = LINK_GUEST;
|
|
arg_link_journal_try = true;
|
|
arg_settings_mask |= SETTING_LINK_JOURNAL;
|
|
break;
|
|
|
|
case ARG_LINK_JOURNAL:
|
|
r = parse_link_journal(optarg, &arg_link_journal, &arg_link_journal_try);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse link journal mode %s", optarg);
|
|
|
|
arg_settings_mask |= SETTING_LINK_JOURNAL;
|
|
break;
|
|
|
|
case ARG_BIND:
|
|
case ARG_BIND_RO:
|
|
r = bind_mount_parse(&arg_custom_mounts, &arg_n_custom_mounts, optarg, c == ARG_BIND_RO);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --bind(-ro)= argument %s: %m", optarg);
|
|
|
|
arg_settings_mask |= SETTING_CUSTOM_MOUNTS;
|
|
break;
|
|
|
|
case ARG_TMPFS:
|
|
r = tmpfs_mount_parse(&arg_custom_mounts, &arg_n_custom_mounts, optarg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --tmpfs= argument %s: %m", optarg);
|
|
|
|
arg_settings_mask |= SETTING_CUSTOM_MOUNTS;
|
|
break;
|
|
|
|
case ARG_OVERLAY:
|
|
case ARG_OVERLAY_RO:
|
|
r = overlay_mount_parse(&arg_custom_mounts, &arg_n_custom_mounts, optarg, c == ARG_OVERLAY_RO);
|
|
if (r == -EADDRNOTAVAIL)
|
|
return log_error_errno(r, "--overlay(-ro)= needs at least two colon-separated directories specified.");
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --overlay(-ro)= argument %s: %m", optarg);
|
|
|
|
arg_settings_mask |= SETTING_CUSTOM_MOUNTS;
|
|
break;
|
|
|
|
case ARG_INACCESSIBLE:
|
|
r = inaccessible_mount_parse(&arg_custom_mounts, &arg_n_custom_mounts, optarg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --inaccessible= argument %s: %m", optarg);
|
|
|
|
arg_settings_mask |= SETTING_CUSTOM_MOUNTS;
|
|
break;
|
|
|
|
case 'E': {
|
|
char **n;
|
|
|
|
if (!env_assignment_is_valid(optarg))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Environment variable assignment '%s' is not valid.", optarg);
|
|
|
|
n = strv_env_set(arg_setenv, optarg);
|
|
if (!n)
|
|
return log_oom();
|
|
|
|
strv_free_and_replace(arg_setenv, n);
|
|
arg_settings_mask |= SETTING_ENVIRONMENT;
|
|
break;
|
|
}
|
|
|
|
case 'q':
|
|
arg_quiet = true;
|
|
break;
|
|
|
|
case ARG_SHARE_SYSTEM:
|
|
/* We don't officially support this anymore, except for compat reasons. People should use the
|
|
* $SYSTEMD_NSPAWN_SHARE_* environment variables instead. */
|
|
log_warning("Please do not use --share-system anymore, use $SYSTEMD_NSPAWN_SHARE_* instead.");
|
|
arg_clone_ns_flags = 0;
|
|
break;
|
|
|
|
case ARG_REGISTER:
|
|
r = parse_boolean(optarg);
|
|
if (r < 0) {
|
|
log_error("Failed to parse --register= argument: %s", optarg);
|
|
return r;
|
|
}
|
|
|
|
arg_register = r;
|
|
break;
|
|
|
|
case ARG_KEEP_UNIT:
|
|
arg_keep_unit = true;
|
|
break;
|
|
|
|
case ARG_PERSONALITY:
|
|
|
|
arg_personality = personality_from_string(optarg);
|
|
if (arg_personality == PERSONALITY_INVALID)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Unknown or unsupported personality '%s'.", optarg);
|
|
|
|
arg_settings_mask |= SETTING_PERSONALITY;
|
|
break;
|
|
|
|
case ARG_VOLATILE:
|
|
|
|
if (!optarg)
|
|
arg_volatile_mode = VOLATILE_YES;
|
|
else if (streq(optarg, "help")) {
|
|
DUMP_STRING_TABLE(volatile_mode, VolatileMode, _VOLATILE_MODE_MAX);
|
|
return 0;
|
|
} else {
|
|
VolatileMode m;
|
|
|
|
m = volatile_mode_from_string(optarg);
|
|
if (m < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Failed to parse --volatile= argument: %s", optarg);
|
|
else
|
|
arg_volatile_mode = m;
|
|
}
|
|
|
|
arg_settings_mask |= SETTING_VOLATILE_MODE;
|
|
break;
|
|
|
|
case 'p':
|
|
r = expose_port_parse(&arg_expose_ports, optarg);
|
|
if (r == -EEXIST)
|
|
return log_error_errno(r, "Duplicate port specification: %s", optarg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse host port %s: %m", optarg);
|
|
|
|
arg_settings_mask |= SETTING_EXPOSE_PORTS;
|
|
break;
|
|
|
|
case ARG_PROPERTY:
|
|
if (strv_extend(&arg_property, optarg) < 0)
|
|
return log_oom();
|
|
|
|
break;
|
|
|
|
case ARG_PRIVATE_USERS: {
|
|
int boolean = -1;
|
|
|
|
if (!optarg)
|
|
boolean = true;
|
|
else if (!in_charset(optarg, DIGITS))
|
|
/* do *not* parse numbers as booleans */
|
|
boolean = parse_boolean(optarg);
|
|
|
|
if (boolean == false) {
|
|
/* no: User namespacing off */
|
|
arg_userns_mode = USER_NAMESPACE_NO;
|
|
arg_uid_shift = UID_INVALID;
|
|
arg_uid_range = UINT32_C(0x10000);
|
|
} else if (boolean == true) {
|
|
/* yes: User namespacing on, UID range is read from root dir */
|
|
arg_userns_mode = USER_NAMESPACE_FIXED;
|
|
arg_uid_shift = UID_INVALID;
|
|
arg_uid_range = UINT32_C(0x10000);
|
|
} else if (streq(optarg, "pick")) {
|
|
/* pick: User namespacing on, UID range is picked randomly */
|
|
arg_userns_mode = USER_NAMESPACE_PICK;
|
|
arg_uid_shift = UID_INVALID;
|
|
arg_uid_range = UINT32_C(0x10000);
|
|
} else {
|
|
_cleanup_free_ char *buffer = NULL;
|
|
const char *range, *shift;
|
|
|
|
/* anything else: User namespacing on, UID range is explicitly configured */
|
|
|
|
range = strchr(optarg, ':');
|
|
if (range) {
|
|
buffer = strndup(optarg, range - optarg);
|
|
if (!buffer)
|
|
return log_oom();
|
|
shift = buffer;
|
|
|
|
range++;
|
|
r = safe_atou32(range, &arg_uid_range);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse UID range \"%s\": %m", range);
|
|
} else
|
|
shift = optarg;
|
|
|
|
r = parse_uid(shift, &arg_uid_shift);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse UID \"%s\": %m", optarg);
|
|
|
|
arg_userns_mode = USER_NAMESPACE_FIXED;
|
|
}
|
|
|
|
if (arg_uid_range <= 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"UID range cannot be 0.");
|
|
|
|
arg_settings_mask |= SETTING_USERNS;
|
|
break;
|
|
}
|
|
|
|
case 'U':
|
|
if (userns_supported()) {
|
|
arg_userns_mode = USER_NAMESPACE_PICK;
|
|
arg_uid_shift = UID_INVALID;
|
|
arg_uid_range = UINT32_C(0x10000);
|
|
|
|
arg_settings_mask |= SETTING_USERNS;
|
|
}
|
|
|
|
break;
|
|
|
|
case ARG_PRIVATE_USERS_CHOWN:
|
|
arg_userns_chown = true;
|
|
|
|
arg_settings_mask |= SETTING_USERNS;
|
|
break;
|
|
|
|
case ARG_KILL_SIGNAL:
|
|
if (streq(optarg, "help")) {
|
|
DUMP_STRING_TABLE(signal, int, _NSIG);
|
|
return 0;
|
|
}
|
|
|
|
arg_kill_signal = signal_from_string(optarg);
|
|
if (arg_kill_signal < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Cannot parse signal: %s", optarg);
|
|
|
|
arg_settings_mask |= SETTING_KILL_SIGNAL;
|
|
break;
|
|
|
|
case ARG_SETTINGS:
|
|
|
|
/* no → do not read files
|
|
* yes → read files, do not override cmdline, trust only subset
|
|
* override → read files, override cmdline, trust only subset
|
|
* trusted → read files, do not override cmdline, trust all
|
|
*/
|
|
|
|
r = parse_boolean(optarg);
|
|
if (r < 0) {
|
|
if (streq(optarg, "trusted")) {
|
|
mask_all_settings = false;
|
|
mask_no_settings = false;
|
|
arg_settings_trusted = true;
|
|
|
|
} else if (streq(optarg, "override")) {
|
|
mask_all_settings = false;
|
|
mask_no_settings = true;
|
|
arg_settings_trusted = -1;
|
|
} else
|
|
return log_error_errno(r, "Failed to parse --settings= argument: %s", optarg);
|
|
} else if (r > 0) {
|
|
/* yes */
|
|
mask_all_settings = false;
|
|
mask_no_settings = false;
|
|
arg_settings_trusted = -1;
|
|
} else {
|
|
/* no */
|
|
mask_all_settings = true;
|
|
mask_no_settings = false;
|
|
arg_settings_trusted = false;
|
|
}
|
|
|
|
break;
|
|
|
|
case ARG_CHDIR:
|
|
if (!path_is_absolute(optarg))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Working directory %s is not an absolute path.", optarg);
|
|
|
|
r = free_and_strdup(&arg_chdir, optarg);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
arg_settings_mask |= SETTING_WORKING_DIRECTORY;
|
|
break;
|
|
|
|
case ARG_PIVOT_ROOT:
|
|
r = pivot_root_parse(&arg_pivot_root_new, &arg_pivot_root_old, optarg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --pivot-root= argument %s: %m", optarg);
|
|
|
|
arg_settings_mask |= SETTING_PIVOT_ROOT;
|
|
break;
|
|
|
|
case ARG_NOTIFY_READY:
|
|
r = parse_boolean(optarg);
|
|
if (r < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"%s is not a valid notify mode. Valid modes are: yes, no, and ready.", optarg);
|
|
arg_notify_ready = r;
|
|
arg_settings_mask |= SETTING_NOTIFY_READY;
|
|
break;
|
|
|
|
case ARG_ROOT_HASH: {
|
|
_cleanup_free_ void *k = NULL;
|
|
size_t l;
|
|
|
|
r = unhexmem(optarg, strlen(optarg), &k, &l);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse root hash: %s", optarg);
|
|
if (l < sizeof(sd_id128_t))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Root hash must be at least 128bit long: %s", optarg);
|
|
|
|
free_and_replace(arg_verity_settings.root_hash, k);
|
|
arg_verity_settings.root_hash_size = l;
|
|
break;
|
|
}
|
|
|
|
case ARG_ROOT_HASH_SIG: {
|
|
char *value;
|
|
size_t l;
|
|
void *p;
|
|
|
|
if ((value = startswith(optarg, "base64:"))) {
|
|
r = unbase64mem(value, strlen(value), &p, &l);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse root hash signature '%s': %m", optarg);
|
|
|
|
} else {
|
|
r = read_full_file(optarg, (char**) &p, &l);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed parse root hash signature file '%s': %m", optarg);
|
|
}
|
|
|
|
free_and_replace(arg_verity_settings.root_hash_sig, p);
|
|
arg_verity_settings.root_hash_sig_size = l;
|
|
break;
|
|
}
|
|
|
|
case ARG_VERITY_DATA:
|
|
r = parse_path_argument_and_warn(optarg, false, &arg_verity_settings.data_path);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
|
|
case ARG_SYSTEM_CALL_FILTER: {
|
|
bool negative;
|
|
const char *items;
|
|
|
|
negative = optarg[0] == '~';
|
|
items = negative ? optarg + 1 : optarg;
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *word = NULL;
|
|
|
|
r = extract_first_word(&items, &word, NULL, 0);
|
|
if (r == 0)
|
|
break;
|
|
if (r == -ENOMEM)
|
|
return log_oom();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse system call filter: %m");
|
|
|
|
if (negative)
|
|
r = strv_extend(&arg_syscall_deny_list, word);
|
|
else
|
|
r = strv_extend(&arg_syscall_allow_list, word);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
arg_settings_mask |= SETTING_SYSCALL_FILTER;
|
|
break;
|
|
}
|
|
|
|
case ARG_RLIMIT: {
|
|
const char *eq;
|
|
_cleanup_free_ char *name = NULL;
|
|
int rl;
|
|
|
|
if (streq(optarg, "help")) {
|
|
DUMP_STRING_TABLE(rlimit, int, _RLIMIT_MAX);
|
|
return 0;
|
|
}
|
|
|
|
eq = strchr(optarg, '=');
|
|
if (!eq)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--rlimit= expects an '=' assignment.");
|
|
|
|
name = strndup(optarg, eq - optarg);
|
|
if (!name)
|
|
return log_oom();
|
|
|
|
rl = rlimit_from_string_harder(name);
|
|
if (rl < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Unknown resource limit: %s", name);
|
|
|
|
if (!arg_rlimit[rl]) {
|
|
arg_rlimit[rl] = new0(struct rlimit, 1);
|
|
if (!arg_rlimit[rl])
|
|
return log_oom();
|
|
}
|
|
|
|
r = rlimit_parse(rl, eq + 1, arg_rlimit[rl]);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse resource limit: %s", eq + 1);
|
|
|
|
arg_settings_mask |= SETTING_RLIMIT_FIRST << rl;
|
|
break;
|
|
}
|
|
|
|
case ARG_OOM_SCORE_ADJUST:
|
|
r = parse_oom_score_adjust(optarg, &arg_oom_score_adjust);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --oom-score-adjust= parameter: %s", optarg);
|
|
|
|
arg_oom_score_adjust_set = true;
|
|
arg_settings_mask |= SETTING_OOM_SCORE_ADJUST;
|
|
break;
|
|
|
|
case ARG_CPU_AFFINITY: {
|
|
CPUSet cpuset;
|
|
|
|
r = parse_cpu_set(optarg, &cpuset);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse CPU affinity mask %s: %m", optarg);
|
|
|
|
cpu_set_reset(&arg_cpu_set);
|
|
arg_cpu_set = cpuset;
|
|
arg_settings_mask |= SETTING_CPU_AFFINITY;
|
|
break;
|
|
}
|
|
|
|
case ARG_RESOLV_CONF:
|
|
if (streq(optarg, "help")) {
|
|
DUMP_STRING_TABLE(resolv_conf_mode, ResolvConfMode, _RESOLV_CONF_MODE_MAX);
|
|
return 0;
|
|
}
|
|
|
|
arg_resolv_conf = resolv_conf_mode_from_string(optarg);
|
|
if (arg_resolv_conf < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Failed to parse /etc/resolv.conf mode: %s", optarg);
|
|
|
|
arg_settings_mask |= SETTING_RESOLV_CONF;
|
|
break;
|
|
|
|
case ARG_TIMEZONE:
|
|
if (streq(optarg, "help")) {
|
|
DUMP_STRING_TABLE(timezone_mode, TimezoneMode, _TIMEZONE_MODE_MAX);
|
|
return 0;
|
|
}
|
|
|
|
arg_timezone = timezone_mode_from_string(optarg);
|
|
if (arg_timezone < 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Failed to parse /etc/localtime mode: %s", optarg);
|
|
|
|
arg_settings_mask |= SETTING_TIMEZONE;
|
|
break;
|
|
|
|
case ARG_CONSOLE:
|
|
r = handle_arg_console(optarg);
|
|
if (r <= 0)
|
|
return r;
|
|
break;
|
|
|
|
case 'P':
|
|
case ARG_PIPE:
|
|
r = handle_arg_console("pipe");
|
|
if (r <= 0)
|
|
return r;
|
|
break;
|
|
|
|
case ARG_NO_PAGER:
|
|
arg_pager_flags |= PAGER_DISABLE;
|
|
break;
|
|
|
|
case ARG_SET_CREDENTIAL: {
|
|
_cleanup_free_ char *word = NULL, *data = NULL;
|
|
const char *p = optarg;
|
|
Credential *a;
|
|
size_t i;
|
|
int l;
|
|
|
|
r = extract_first_word(&p, &word, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
|
|
if (r == -ENOMEM)
|
|
return log_oom();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --set-credential= parameter: %m");
|
|
if (r == 0 || !p)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Missing value for --set-credential=: %s", optarg);
|
|
|
|
if (!credential_name_valid(word))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Credential name is not valid: %s", word);
|
|
|
|
for (i = 0; i < arg_n_credentials; i++)
|
|
if (streq(arg_credentials[i].id, word))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EEXIST), "Duplicate credential '%s', refusing.", word);
|
|
|
|
l = cunescape(p, UNESCAPE_ACCEPT_NUL, &data);
|
|
if (l < 0)
|
|
return log_error_errno(l, "Failed to unescape credential data: %s", p);
|
|
|
|
a = reallocarray(arg_credentials, arg_n_credentials + 1, sizeof(Credential));
|
|
if (!a)
|
|
return log_oom();
|
|
|
|
a[arg_n_credentials++] = (Credential) {
|
|
.id = TAKE_PTR(word),
|
|
.data = TAKE_PTR(data),
|
|
.size = l,
|
|
};
|
|
|
|
arg_credentials = a;
|
|
|
|
arg_settings_mask |= SETTING_CREDENTIALS;
|
|
break;
|
|
}
|
|
|
|
case ARG_LOAD_CREDENTIAL: {
|
|
ReadFullFileFlags flags = READ_FULL_FILE_SECURE;
|
|
_cleanup_(erase_and_freep) char *data = NULL;
|
|
_cleanup_free_ char *word = NULL, *j = NULL;
|
|
const char *p = optarg;
|
|
Credential *a;
|
|
size_t size, i;
|
|
|
|
r = extract_first_word(&p, &word, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
|
|
if (r == -ENOMEM)
|
|
return log_oom();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --set-credential= parameter: %m");
|
|
if (r == 0 || !p)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Missing value for --set-credential=: %s", optarg);
|
|
|
|
if (!credential_name_valid(word))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Credential name is not valid: %s", word);
|
|
|
|
for (i = 0; i < arg_n_credentials; i++)
|
|
if (streq(arg_credentials[i].id, word))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EEXIST), "Duplicate credential '%s', refusing.", word);
|
|
|
|
if (path_is_absolute(p))
|
|
flags |= READ_FULL_FILE_CONNECT_SOCKET;
|
|
else {
|
|
const char *e;
|
|
|
|
e = getenv("CREDENTIALS_DIRECTORY");
|
|
if (!e)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Credential not available (no credentials passed at all): %s", word);
|
|
|
|
j = path_join(e, p);
|
|
if (!j)
|
|
return log_oom();
|
|
}
|
|
|
|
r = read_full_file_full(AT_FDCWD, j ?: p, UINT64_MAX, SIZE_MAX,
|
|
flags,
|
|
NULL,
|
|
&data, &size);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read credential '%s': %m", j ?: p);
|
|
|
|
a = reallocarray(arg_credentials, arg_n_credentials + 1, sizeof(Credential));
|
|
if (!a)
|
|
return log_oom();
|
|
|
|
a[arg_n_credentials++] = (Credential) {
|
|
.id = TAKE_PTR(word),
|
|
.data = TAKE_PTR(data),
|
|
.size = size,
|
|
};
|
|
|
|
arg_credentials = a;
|
|
|
|
arg_settings_mask |= SETTING_CREDENTIALS;
|
|
break;
|
|
}
|
|
|
|
case '?':
|
|
return -EINVAL;
|
|
|
|
default:
|
|
assert_not_reached("Unhandled option");
|
|
}
|
|
|
|
if (argc > optind) {
|
|
strv_free(arg_parameters);
|
|
arg_parameters = strv_copy(argv + optind);
|
|
if (!arg_parameters)
|
|
return log_oom();
|
|
|
|
arg_settings_mask |= SETTING_START_MODE;
|
|
}
|
|
|
|
if (arg_ephemeral && arg_template && !arg_directory)
|
|
/* User asked for ephemeral execution but specified --template= instead of --directory=. Semantically
|
|
* such an invocation makes some sense, see https://github.com/systemd/systemd/issues/3667. Let's
|
|
* accept this here, and silently make "--ephemeral --template=" equivalent to "--ephemeral
|
|
* --directory=". */
|
|
arg_directory = TAKE_PTR(arg_template);
|
|
|
|
arg_caps_retain = (arg_caps_retain | plus | (arg_private_network ? UINT64_C(1) << CAP_NET_ADMIN : 0)) & ~minus;
|
|
|
|
/* Make sure to parse environment before we reset the settings mask below */
|
|
r = parse_environment();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Load all settings from .nspawn files */
|
|
if (mask_no_settings)
|
|
arg_settings_mask = 0;
|
|
|
|
/* Don't load any settings from .nspawn files */
|
|
if (mask_all_settings)
|
|
arg_settings_mask = _SETTINGS_MASK_ALL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int verify_arguments(void) {
|
|
int r;
|
|
|
|
if (arg_start_mode == START_PID2 && arg_unified_cgroup_hierarchy == CGROUP_UNIFIED_UNKNOWN) {
|
|
/* If we are running the stub init in the container, we don't need to look at what the init
|
|
* in the container supports, because we are not using it. Let's immediately pick the right
|
|
* setting based on the host system configuration.
|
|
*
|
|
* We only do this, if the user didn't use an environment variable to override the detection.
|
|
*/
|
|
|
|
r = cg_all_unified();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine whether we are in all unified mode.");
|
|
if (r > 0)
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_ALL;
|
|
else if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0)
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_SYSTEMD;
|
|
else
|
|
arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
|
|
}
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO)
|
|
arg_mount_settings |= MOUNT_USE_USERNS;
|
|
|
|
if (arg_private_network)
|
|
arg_mount_settings |= MOUNT_APPLY_APIVFS_NETNS;
|
|
|
|
if (!(arg_clone_ns_flags & CLONE_NEWPID) ||
|
|
!(arg_clone_ns_flags & CLONE_NEWUTS)) {
|
|
arg_register = false;
|
|
if (arg_start_mode != START_PID1)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--boot cannot be used without namespacing.");
|
|
}
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_PICK)
|
|
arg_userns_chown = true;
|
|
|
|
if (arg_start_mode == START_BOOT && arg_kill_signal <= 0)
|
|
arg_kill_signal = SIGRTMIN+3;
|
|
|
|
if (arg_volatile_mode != VOLATILE_NO) /* Make sure all file systems contained in the image are mounted read-only if we are in volatile mode */
|
|
arg_read_only = true;
|
|
|
|
if (has_custom_root_mount(arg_custom_mounts, arg_n_custom_mounts))
|
|
arg_read_only = true;
|
|
|
|
if (arg_keep_unit && arg_register && cg_pid_get_owner_uid(0, NULL) >= 0)
|
|
/* Save the user from accidentally registering either user-$SESSION.scope or user@.service.
|
|
* The latter is not technically a user session, but we don't need to labour the point. */
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--keep-unit --register=yes may not be used when invoked from a user session.");
|
|
|
|
if (arg_directory && arg_image)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--directory= and --image= may not be combined.");
|
|
|
|
if (arg_template && arg_image)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--template= and --image= may not be combined.");
|
|
|
|
if (arg_template && !(arg_directory || arg_machine))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--template= needs --directory= or --machine=.");
|
|
|
|
if (arg_ephemeral && arg_template)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--ephemeral and --template= may not be combined.");
|
|
|
|
if (arg_ephemeral && !IN_SET(arg_link_journal, LINK_NO, LINK_AUTO))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--ephemeral and --link-journal= may not be combined.");
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO && !userns_supported())
|
|
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "--private-users= is not supported, kernel compiled without user namespace support.");
|
|
|
|
if (arg_userns_chown && arg_read_only)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--read-only and --private-users-chown may not be combined.");
|
|
|
|
/* We don't support --private-users-chown together with any of the volatile modes since we couldn't
|
|
* change the read-only part of the tree (i.e. /usr) anyway, or because it would trigger a massive
|
|
* copy-up (in case of overlay) making the entire exercise pointless. */
|
|
if (arg_userns_chown && arg_volatile_mode != VOLATILE_NO)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--volatile= and --private-users-chown may not be combined.");
|
|
|
|
/* If --network-namespace-path is given with any other network-related option (except --private-network),
|
|
* we need to error out, to avoid conflicts between different network options. */
|
|
if (arg_network_namespace_path &&
|
|
(arg_network_interfaces || arg_network_macvlan ||
|
|
arg_network_ipvlan || arg_network_veth_extra ||
|
|
arg_network_bridge || arg_network_zone ||
|
|
arg_network_veth))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--network-namespace-path= cannot be combined with other network options.");
|
|
|
|
if (arg_network_bridge && arg_network_zone)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"--network-bridge= and --network-zone= may not be combined.");
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO && (arg_mount_settings & MOUNT_APPLY_APIVFS_NETNS) && !arg_private_network)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid namespacing settings. Mounting sysfs with --private-users requires --private-network.");
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO && !(arg_mount_settings & MOUNT_APPLY_APIVFS_RO))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot combine --private-users with read-write mounts.");
|
|
|
|
if (arg_expose_ports && !arg_private_network)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot use --port= without private networking.");
|
|
|
|
if (arg_caps_ambient) {
|
|
if (arg_caps_ambient == (uint64_t)-1)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "AmbientCapability= does not support the value all.");
|
|
|
|
if ((arg_caps_ambient & arg_caps_retain) != arg_caps_ambient)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "AmbientCapability= setting is not fully covered by Capability= setting.");
|
|
|
|
if (arg_start_mode == START_BOOT)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "AmbientCapability= setting is not useful for boot mode.");
|
|
}
|
|
|
|
r = custom_mount_check_all();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int userns_lchown(const char *p, uid_t uid, gid_t gid) {
|
|
assert(p);
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_NO)
|
|
return 0;
|
|
|
|
if (uid == UID_INVALID && gid == GID_INVALID)
|
|
return 0;
|
|
|
|
if (uid != UID_INVALID) {
|
|
uid += arg_uid_shift;
|
|
|
|
if (uid < arg_uid_shift || uid >= arg_uid_shift + arg_uid_range)
|
|
return -EOVERFLOW;
|
|
}
|
|
|
|
if (gid != GID_INVALID) {
|
|
gid += (gid_t) arg_uid_shift;
|
|
|
|
if (gid < (gid_t) arg_uid_shift || gid >= (gid_t) (arg_uid_shift + arg_uid_range))
|
|
return -EOVERFLOW;
|
|
}
|
|
|
|
if (lchown(p, uid, gid) < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int userns_mkdir(const char *root, const char *path, mode_t mode, uid_t uid, gid_t gid) {
|
|
const char *q;
|
|
int r;
|
|
|
|
q = prefix_roota(root, path);
|
|
r = mkdir_errno_wrapper(q, mode);
|
|
if (r == -EEXIST)
|
|
return 0;
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return userns_lchown(q, uid, gid);
|
|
}
|
|
|
|
static const char *timezone_from_path(const char *path) {
|
|
return PATH_STARTSWITH_SET(
|
|
path,
|
|
"../usr/share/zoneinfo/",
|
|
"/usr/share/zoneinfo/");
|
|
}
|
|
|
|
static bool etc_writable(void) {
|
|
return !arg_read_only || IN_SET(arg_volatile_mode, VOLATILE_YES, VOLATILE_OVERLAY);
|
|
}
|
|
|
|
static int setup_timezone(const char *dest) {
|
|
_cleanup_free_ char *p = NULL, *etc = NULL;
|
|
const char *where, *check;
|
|
TimezoneMode m;
|
|
int r;
|
|
|
|
assert(dest);
|
|
|
|
if (IN_SET(arg_timezone, TIMEZONE_AUTO, TIMEZONE_SYMLINK)) {
|
|
r = readlink_malloc("/etc/localtime", &p);
|
|
if (r == -ENOENT && arg_timezone == TIMEZONE_AUTO)
|
|
m = etc_writable() ? TIMEZONE_DELETE : TIMEZONE_OFF;
|
|
else if (r == -EINVAL && arg_timezone == TIMEZONE_AUTO) /* regular file? */
|
|
m = etc_writable() ? TIMEZONE_COPY : TIMEZONE_BIND;
|
|
else if (r < 0) {
|
|
log_warning_errno(r, "Failed to read host's /etc/localtime symlink, not updating container timezone: %m");
|
|
/* To handle warning, delete /etc/localtime and replace it with a symbolic link to a time zone data
|
|
* file.
|
|
*
|
|
* Example:
|
|
* ln -s /usr/share/zoneinfo/UTC /etc/localtime
|
|
*/
|
|
return 0;
|
|
} else if (arg_timezone == TIMEZONE_AUTO)
|
|
m = etc_writable() ? TIMEZONE_SYMLINK : TIMEZONE_BIND;
|
|
else
|
|
m = arg_timezone;
|
|
} else
|
|
m = arg_timezone;
|
|
|
|
if (m == TIMEZONE_OFF)
|
|
return 0;
|
|
|
|
r = chase_symlinks("/etc", dest, CHASE_PREFIX_ROOT, &etc, NULL);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to resolve /etc path in container, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
where = strjoina(etc, "/localtime");
|
|
|
|
switch (m) {
|
|
|
|
case TIMEZONE_DELETE:
|
|
if (unlink(where) < 0)
|
|
log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno, "Failed to remove '%s', ignoring: %m", where);
|
|
|
|
return 0;
|
|
|
|
case TIMEZONE_SYMLINK: {
|
|
_cleanup_free_ char *q = NULL;
|
|
const char *z, *what;
|
|
|
|
z = timezone_from_path(p);
|
|
if (!z) {
|
|
log_warning("/etc/localtime does not point into /usr/share/zoneinfo/, not updating container timezone.");
|
|
return 0;
|
|
}
|
|
|
|
r = readlink_malloc(where, &q);
|
|
if (r >= 0 && streq_ptr(timezone_from_path(q), z))
|
|
return 0; /* Already pointing to the right place? Then do nothing .. */
|
|
|
|
check = strjoina(dest, "/usr/share/zoneinfo/", z);
|
|
r = chase_symlinks(check, dest, 0, NULL, NULL);
|
|
if (r < 0)
|
|
log_debug_errno(r, "Timezone %s does not exist (or is not accessible) in container, not creating symlink: %m", z);
|
|
else {
|
|
if (unlink(where) < 0 && errno != ENOENT) {
|
|
log_full_errno(IN_SET(errno, EROFS, EACCES, EPERM) ? LOG_DEBUG : LOG_WARNING, /* Don't complain on read-only images */
|
|
errno, "Failed to remove existing timezone info %s in container, ignoring: %m", where);
|
|
return 0;
|
|
}
|
|
|
|
what = strjoina("../usr/share/zoneinfo/", z);
|
|
if (symlink(what, where) < 0) {
|
|
log_full_errno(IN_SET(errno, EROFS, EACCES, EPERM) ? LOG_DEBUG : LOG_WARNING,
|
|
errno, "Failed to correct timezone of container, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
_fallthrough_;
|
|
}
|
|
|
|
case TIMEZONE_BIND: {
|
|
_cleanup_free_ char *resolved = NULL;
|
|
int found;
|
|
|
|
found = chase_symlinks(where, dest, CHASE_NONEXISTENT, &resolved, NULL);
|
|
if (found < 0) {
|
|
log_warning_errno(found, "Failed to resolve /etc/localtime path in container, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
if (found == 0) /* missing? */
|
|
(void) touch(resolved);
|
|
|
|
r = mount_nofollow_verbose(LOG_WARNING, "/etc/localtime", resolved, NULL, MS_BIND, NULL);
|
|
if (r >= 0)
|
|
return mount_nofollow_verbose(LOG_ERR, NULL, resolved, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY|MS_NOSUID|MS_NODEV, NULL);
|
|
|
|
_fallthrough_;
|
|
}
|
|
|
|
case TIMEZONE_COPY:
|
|
/* If mounting failed, try to copy */
|
|
r = copy_file_atomic("/etc/localtime", where, 0644, 0, 0, COPY_REFLINK|COPY_REPLACE);
|
|
if (r < 0) {
|
|
log_full_errno(IN_SET(r, -EROFS, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING, r,
|
|
"Failed to copy /etc/localtime to %s, ignoring: %m", where);
|
|
return 0;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("unexpected mode");
|
|
}
|
|
|
|
/* Fix permissions of the symlink or file copy we just created */
|
|
r = userns_lchown(where, 0, 0);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to chown /etc/localtime, ignoring: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int have_resolv_conf(const char *path) {
|
|
assert(path);
|
|
|
|
if (access(path, F_OK) < 0) {
|
|
if (errno == ENOENT)
|
|
return 0;
|
|
|
|
return log_debug_errno(errno, "Failed to determine whether '%s' is available: %m", path);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int resolved_listening(void) {
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
|
|
_cleanup_free_ char *dns_stub_listener_mode = NULL;
|
|
int r;
|
|
|
|
/* Check if resolved is listening */
|
|
|
|
r = sd_bus_open_system(&bus);
|
|
if (r < 0)
|
|
return log_debug_errno(r, "Failed to open system bus: %m");
|
|
|
|
r = bus_name_has_owner(bus, "org.freedesktop.resolve1", NULL);
|
|
if (r < 0)
|
|
return log_debug_errno(r, "Failed to check whether the 'org.freedesktop.resolve1' bus name is taken: %m");
|
|
if (r == 0)
|
|
return 0;
|
|
|
|
r = sd_bus_get_property_string(bus,
|
|
"org.freedesktop.resolve1",
|
|
"/org/freedesktop/resolve1",
|
|
"org.freedesktop.resolve1.Manager",
|
|
"DNSStubListener",
|
|
&error,
|
|
&dns_stub_listener_mode);
|
|
if (r < 0)
|
|
return log_debug_errno(r, "Failed to query DNSStubListener property: %s", bus_error_message(&error, r));
|
|
|
|
return STR_IN_SET(dns_stub_listener_mode, "udp", "yes");
|
|
}
|
|
|
|
static int setup_resolv_conf(const char *dest) {
|
|
_cleanup_free_ char *etc = NULL;
|
|
const char *where, *what;
|
|
ResolvConfMode m;
|
|
int r;
|
|
|
|
assert(dest);
|
|
|
|
if (arg_resolv_conf == RESOLV_CONF_AUTO) {
|
|
if (arg_private_network)
|
|
m = RESOLV_CONF_OFF;
|
|
else if (have_resolv_conf(PRIVATE_STUB_RESOLV_CONF) > 0 && resolved_listening() > 0)
|
|
m = etc_writable() ? RESOLV_CONF_COPY_STUB : RESOLV_CONF_BIND_STUB;
|
|
else if (have_resolv_conf("/etc/resolv.conf") > 0)
|
|
m = etc_writable() ? RESOLV_CONF_COPY_HOST : RESOLV_CONF_BIND_HOST;
|
|
else
|
|
m = etc_writable() ? RESOLV_CONF_DELETE : RESOLV_CONF_OFF;
|
|
|
|
} else
|
|
m = arg_resolv_conf;
|
|
|
|
if (m == RESOLV_CONF_OFF)
|
|
return 0;
|
|
|
|
r = chase_symlinks("/etc", dest, CHASE_PREFIX_ROOT, &etc, NULL);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to resolve /etc path in container, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
where = strjoina(etc, "/resolv.conf");
|
|
|
|
if (m == RESOLV_CONF_DELETE) {
|
|
if (unlink(where) < 0)
|
|
log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno, "Failed to remove '%s', ignoring: %m", where);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (IN_SET(m, RESOLV_CONF_BIND_STATIC, RESOLV_CONF_REPLACE_STATIC, RESOLV_CONF_COPY_STATIC))
|
|
what = PRIVATE_STATIC_RESOLV_CONF;
|
|
else if (IN_SET(m, RESOLV_CONF_BIND_UPLINK, RESOLV_CONF_REPLACE_UPLINK, RESOLV_CONF_COPY_UPLINK))
|
|
what = PRIVATE_UPLINK_RESOLV_CONF;
|
|
else if (IN_SET(m, RESOLV_CONF_BIND_STUB, RESOLV_CONF_REPLACE_STUB, RESOLV_CONF_COPY_STUB))
|
|
what = PRIVATE_STUB_RESOLV_CONF;
|
|
else
|
|
what = "/etc/resolv.conf";
|
|
|
|
if (IN_SET(m, RESOLV_CONF_BIND_HOST, RESOLV_CONF_BIND_STATIC, RESOLV_CONF_BIND_UPLINK, RESOLV_CONF_BIND_STUB)) {
|
|
_cleanup_free_ char *resolved = NULL;
|
|
int found;
|
|
|
|
found = chase_symlinks(where, dest, CHASE_NONEXISTENT, &resolved, NULL);
|
|
if (found < 0) {
|
|
log_warning_errno(found, "Failed to resolve /etc/resolv.conf path in container, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
if (found == 0) /* missing? */
|
|
(void) touch(resolved);
|
|
|
|
r = mount_nofollow_verbose(LOG_WARNING, what, resolved, NULL, MS_BIND, NULL);
|
|
if (r >= 0)
|
|
return mount_nofollow_verbose(LOG_ERR, NULL, resolved, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY|MS_NOSUID|MS_NODEV, NULL);
|
|
|
|
/* If that didn't work, let's copy the file */
|
|
}
|
|
|
|
if (IN_SET(m, RESOLV_CONF_REPLACE_HOST, RESOLV_CONF_REPLACE_STATIC, RESOLV_CONF_REPLACE_UPLINK, RESOLV_CONF_REPLACE_STUB))
|
|
r = copy_file_atomic(what, where, 0644, 0, 0, COPY_REFLINK|COPY_REPLACE);
|
|
else
|
|
r = copy_file(what, where, O_TRUNC|O_NOFOLLOW, 0644, 0, 0, COPY_REFLINK);
|
|
if (r < 0) {
|
|
/* If the file already exists as symlink, let's suppress the warning, under the assumption that
|
|
* resolved or something similar runs inside and the symlink points there.
|
|
*
|
|
* If the disk image is read-only, there's also no point in complaining.
|
|
*/
|
|
log_full_errno(!IN_SET(RESOLV_CONF_COPY_HOST, RESOLV_CONF_COPY_STATIC, RESOLV_CONF_COPY_UPLINK, RESOLV_CONF_COPY_STUB) &&
|
|
IN_SET(r, -ELOOP, -EROFS, -EACCES, -EPERM) ? LOG_DEBUG : LOG_WARNING, r,
|
|
"Failed to copy /etc/resolv.conf to %s, ignoring: %m", where);
|
|
return 0;
|
|
}
|
|
|
|
r = userns_lchown(where, 0, 0);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to chown /etc/resolv.conf, ignoring: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_boot_id(void) {
|
|
_cleanup_(unlink_and_freep) char *from = NULL;
|
|
_cleanup_free_ char *path = NULL;
|
|
sd_id128_t rnd = SD_ID128_NULL;
|
|
const char *to;
|
|
int r;
|
|
|
|
/* Generate a new randomized boot ID, so that each boot-up of the container gets a new one */
|
|
|
|
r = tempfn_random_child("/run", "proc-sys-kernel-random-boot-id", &path);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to generate random boot ID path: %m");
|
|
|
|
r = sd_id128_randomize(&rnd);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to generate random boot id: %m");
|
|
|
|
r = id128_write(path, ID128_UUID, rnd, false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write boot id: %m");
|
|
|
|
from = TAKE_PTR(path);
|
|
to = "/proc/sys/kernel/random/boot_id";
|
|
|
|
r = mount_nofollow_verbose(LOG_ERR, from, to, NULL, MS_BIND, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return mount_nofollow_verbose(LOG_ERR, NULL, to, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
|
|
}
|
|
|
|
static int copy_devnodes(const char *dest) {
|
|
static const char devnodes[] =
|
|
"null\0"
|
|
"zero\0"
|
|
"full\0"
|
|
"random\0"
|
|
"urandom\0"
|
|
"tty\0"
|
|
"net/tun\0";
|
|
|
|
_cleanup_umask_ mode_t u;
|
|
const char *d;
|
|
int r = 0;
|
|
|
|
assert(dest);
|
|
|
|
u = umask(0000);
|
|
|
|
/* Create /dev/net, so that we can create /dev/net/tun in it */
|
|
if (userns_mkdir(dest, "/dev/net", 0755, 0, 0) < 0)
|
|
return log_error_errno(r, "Failed to create /dev/net directory: %m");
|
|
|
|
NULSTR_FOREACH(d, devnodes) {
|
|
_cleanup_free_ char *from = NULL, *to = NULL;
|
|
struct stat st;
|
|
|
|
from = path_join("/dev/", d);
|
|
if (!from)
|
|
return log_oom();
|
|
|
|
to = path_join(dest, from);
|
|
if (!to)
|
|
return log_oom();
|
|
|
|
if (stat(from, &st) < 0) {
|
|
|
|
if (errno != ENOENT)
|
|
return log_error_errno(errno, "Failed to stat %s: %m", from);
|
|
|
|
} else if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"%s is not a char or block device, cannot copy.", from);
|
|
else {
|
|
_cleanup_free_ char *sl = NULL, *prefixed = NULL, *dn = NULL, *t = NULL;
|
|
|
|
if (mknod(to, st.st_mode, st.st_rdev) < 0) {
|
|
/* Explicitly warn the user when /dev is already populated. */
|
|
if (errno == EEXIST)
|
|
log_notice("%s/dev is pre-mounted and pre-populated. If a pre-mounted /dev is provided it needs to be an unpopulated file system.", dest);
|
|
if (errno != EPERM)
|
|
return log_error_errno(errno, "mknod(%s) failed: %m", to);
|
|
|
|
/* Some systems abusively restrict mknod but allow bind mounts. */
|
|
r = touch(to);
|
|
if (r < 0)
|
|
return log_error_errno(r, "touch (%s) failed: %m", to);
|
|
r = mount_nofollow_verbose(LOG_DEBUG, from, to, NULL, MS_BIND, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Both mknod and bind mount (%s) failed: %m", to);
|
|
}
|
|
|
|
r = userns_lchown(to, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "chown() of device node %s failed: %m", to);
|
|
|
|
dn = path_join("/dev", S_ISCHR(st.st_mode) ? "char" : "block");
|
|
if (!dn)
|
|
return log_oom();
|
|
|
|
r = userns_mkdir(dest, dn, 0755, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create '%s': %m", dn);
|
|
|
|
if (asprintf(&sl, "%s/%u:%u", dn, major(st.st_rdev), minor(st.st_rdev)) < 0)
|
|
return log_oom();
|
|
|
|
prefixed = path_join(dest, sl);
|
|
if (!prefixed)
|
|
return log_oom();
|
|
|
|
t = path_join("..", d);
|
|
if (!t)
|
|
return log_oom();
|
|
|
|
if (symlink(t, prefixed) < 0)
|
|
log_debug_errno(errno, "Failed to symlink '%s' to '%s': %m", t, prefixed);
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int make_extra_nodes(const char *dest) {
|
|
_cleanup_umask_ mode_t u;
|
|
size_t i;
|
|
int r;
|
|
|
|
u = umask(0000);
|
|
|
|
for (i = 0; i < arg_n_extra_nodes; i++) {
|
|
_cleanup_free_ char *path = NULL;
|
|
DeviceNode *n = arg_extra_nodes + i;
|
|
|
|
path = path_join(dest, n->path);
|
|
if (!path)
|
|
return log_oom();
|
|
|
|
if (mknod(path, n->mode, S_ISCHR(n->mode) || S_ISBLK(n->mode) ? makedev(n->major, n->minor) : 0) < 0)
|
|
return log_error_errno(errno, "Failed to create device node '%s': %m", path);
|
|
|
|
r = chmod_and_chown(path, n->mode, n->uid, n->gid);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to adjust device node ownership of '%s': %m", path);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_pts(const char *dest) {
|
|
_cleanup_free_ char *options = NULL;
|
|
const char *p;
|
|
int r;
|
|
|
|
#if HAVE_SELINUX
|
|
if (arg_selinux_apifs_context)
|
|
(void) asprintf(&options,
|
|
"newinstance,ptmxmode=0666,mode=620,gid=" GID_FMT ",context=\"%s\"",
|
|
arg_uid_shift + TTY_GID,
|
|
arg_selinux_apifs_context);
|
|
else
|
|
#endif
|
|
(void) asprintf(&options,
|
|
"newinstance,ptmxmode=0666,mode=620,gid=" GID_FMT,
|
|
arg_uid_shift + TTY_GID);
|
|
|
|
if (!options)
|
|
return log_oom();
|
|
|
|
/* Mount /dev/pts itself */
|
|
p = prefix_roota(dest, "/dev/pts");
|
|
r = mkdir_errno_wrapper(p, 0755);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create /dev/pts: %m");
|
|
|
|
r = mount_nofollow_verbose(LOG_ERR, "devpts", p, "devpts", MS_NOSUID|MS_NOEXEC, options);
|
|
if (r < 0)
|
|
return r;
|
|
r = userns_lchown(p, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to chown /dev/pts: %m");
|
|
|
|
/* Create /dev/ptmx symlink */
|
|
p = prefix_roota(dest, "/dev/ptmx");
|
|
if (symlink("pts/ptmx", p) < 0)
|
|
return log_error_errno(errno, "Failed to create /dev/ptmx symlink: %m");
|
|
r = userns_lchown(p, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to chown /dev/ptmx: %m");
|
|
|
|
/* And fix /dev/pts/ptmx ownership */
|
|
p = prefix_roota(dest, "/dev/pts/ptmx");
|
|
r = userns_lchown(p, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to chown /dev/pts/ptmx: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_stdio_as_dev_console(void) {
|
|
_cleanup_close_ int terminal = -1;
|
|
int r;
|
|
|
|
/* We open the TTY in O_NOCTTY mode, so that we do not become controller yet. We'll do that later
|
|
* explicitly, if we are configured to. */
|
|
terminal = open_terminal("/dev/console", O_RDWR|O_NOCTTY);
|
|
if (terminal < 0)
|
|
return log_error_errno(terminal, "Failed to open console: %m");
|
|
|
|
/* Make sure we can continue logging to the original stderr, even if
|
|
* stderr points elsewhere now */
|
|
r = log_dup_console();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to duplicate stderr: %m");
|
|
|
|
/* invalidates 'terminal' on success and failure */
|
|
r = rearrange_stdio(terminal, terminal, terminal);
|
|
TAKE_FD(terminal);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to move console to stdin/stdout/stderr: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_dev_console(const char *console) {
|
|
_cleanup_free_ char *p = NULL;
|
|
int r;
|
|
|
|
/* Create /dev/console symlink */
|
|
r = path_make_relative("/dev", console, &p);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create relative path: %m");
|
|
|
|
if (symlink(p, "/dev/console") < 0)
|
|
return log_error_errno(errno, "Failed to create /dev/console symlink: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_keyring(void) {
|
|
key_serial_t keyring;
|
|
|
|
/* Allocate a new session keyring for the container. This makes sure the keyring of the session
|
|
* systemd-nspawn was invoked from doesn't leak into the container. Note that by default we block
|
|
* keyctl() and request_key() anyway via seccomp so doing this operation isn't strictly necessary,
|
|
* but in case people explicitly allow-list these system calls let's make sure we don't leak anything
|
|
* into the container. */
|
|
|
|
keyring = keyctl(KEYCTL_JOIN_SESSION_KEYRING, 0, 0, 0, 0);
|
|
if (keyring == -1) {
|
|
if (errno == ENOSYS)
|
|
log_debug_errno(errno, "Kernel keyring not supported, ignoring.");
|
|
else if (ERRNO_IS_PRIVILEGE(errno))
|
|
log_debug_errno(errno, "Kernel keyring access prohibited, ignoring.");
|
|
else
|
|
return log_error_errno(errno, "Setting up kernel keyring failed: %m");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_credentials(const char *root) {
|
|
const char *q;
|
|
int r;
|
|
|
|
if (arg_n_credentials <= 0)
|
|
return 0;
|
|
|
|
r = userns_mkdir(root, "/run/host", 0755, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create /run/host: %m");
|
|
|
|
r = userns_mkdir(root, "/run/host/credentials", 0700, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create /run/host/credentials: %m");
|
|
|
|
q = prefix_roota(root, "/run/host/credentials");
|
|
r = mount_nofollow_verbose(LOG_ERR, NULL, q, "ramfs", MS_NOSUID|MS_NOEXEC|MS_NODEV, "mode=0700");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (size_t i = 0; i < arg_n_credentials; i++) {
|
|
_cleanup_free_ char *j = NULL;
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
j = path_join(q, arg_credentials[i].id);
|
|
if (!j)
|
|
return log_oom();
|
|
|
|
fd = open(j, O_CREAT|O_EXCL|O_WRONLY|O_CLOEXEC|O_NOFOLLOW, 0600);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to create credential file %s: %m", j);
|
|
|
|
r = loop_write(fd, arg_credentials[i].data, arg_credentials[i].size, /* do_poll= */ false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write credential to file %s: %m", j);
|
|
|
|
if (fchmod(fd, 0400) < 0)
|
|
return log_error_errno(errno, "Failed to adjust access mode of %s: %m", j);
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO) {
|
|
if (fchown(fd, arg_uid_shift, arg_uid_shift) < 0)
|
|
return log_error_errno(errno, "Failed to adjust ownership of %s: %m", j);
|
|
}
|
|
}
|
|
|
|
if (chmod(q, 0500) < 0)
|
|
return log_error_errno(errno, "Failed to adjust access mode of %s: %m", q);
|
|
|
|
r = userns_lchown(q, 0, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Make both mount and superblock read-only now */
|
|
r = mount_nofollow_verbose(LOG_ERR, NULL, q, NULL, MS_REMOUNT|MS_BIND|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return mount_nofollow_verbose(LOG_ERR, NULL, q, NULL, MS_REMOUNT|MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, "mode=0500");
|
|
}
|
|
|
|
static int setup_kmsg(int kmsg_socket) {
|
|
_cleanup_(unlink_and_freep) char *from = NULL;
|
|
_cleanup_free_ char *fifo = NULL;
|
|
_cleanup_close_ int fd = -1;
|
|
_cleanup_umask_ mode_t u;
|
|
int r;
|
|
|
|
assert(kmsg_socket >= 0);
|
|
|
|
u = umask(0000);
|
|
|
|
/* We create the kmsg FIFO as as temporary file in /run, but immediately delete it after bind mounting it to
|
|
* /proc/kmsg. While FIFOs on the reading side behave very similar to /proc/kmsg, their writing side behaves
|
|
* differently from /dev/kmsg in that writing blocks when nothing is reading. In order to avoid any problems
|
|
* with containers deadlocking due to this we simply make /dev/kmsg unavailable to the container. */
|
|
|
|
r = tempfn_random_child("/run", "proc-kmsg", &fifo);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to generate kmsg path: %m");
|
|
|
|
if (mkfifo(fifo, 0600) < 0)
|
|
return log_error_errno(errno, "mkfifo() for /run/kmsg failed: %m");
|
|
|
|
from = TAKE_PTR(fifo);
|
|
|
|
r = mount_nofollow_verbose(LOG_ERR, from, "/proc/kmsg", NULL, MS_BIND, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
fd = open(from, O_RDWR|O_NONBLOCK|O_CLOEXEC);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to open fifo: %m");
|
|
|
|
/* Store away the fd in the socket, so that it stays open as long as we run the child */
|
|
r = send_one_fd(kmsg_socket, fd, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to send FIFO fd: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct ExposeArgs {
|
|
union in_addr_union address;
|
|
struct FirewallContext *fw_ctx;
|
|
};
|
|
|
|
static int on_address_change(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
|
|
struct ExposeArgs *args = userdata;
|
|
|
|
assert(rtnl);
|
|
assert(m);
|
|
assert(args);
|
|
|
|
expose_port_execute(rtnl, &args->fw_ctx, arg_expose_ports, &args->address);
|
|
return 0;
|
|
}
|
|
|
|
static int setup_hostname(void) {
|
|
int r;
|
|
|
|
if ((arg_clone_ns_flags & CLONE_NEWUTS) == 0)
|
|
return 0;
|
|
|
|
r = sethostname_idempotent(arg_hostname ?: arg_machine);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set hostname: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_journal(const char *directory) {
|
|
_cleanup_free_ char *d = NULL;
|
|
char id[SD_ID128_STRING_MAX];
|
|
const char *dirname, *p, *q;
|
|
sd_id128_t this_id;
|
|
bool try;
|
|
int r;
|
|
|
|
/* Don't link journals in ephemeral mode */
|
|
if (arg_ephemeral)
|
|
return 0;
|
|
|
|
if (arg_link_journal == LINK_NO)
|
|
return 0;
|
|
|
|
try = arg_link_journal_try || arg_link_journal == LINK_AUTO;
|
|
|
|
r = sd_id128_get_machine(&this_id);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to retrieve machine ID: %m");
|
|
|
|
if (sd_id128_equal(arg_uuid, this_id)) {
|
|
log_full(try ? LOG_WARNING : LOG_ERR,
|
|
"Host and machine ids are equal (%s): refusing to link journals", sd_id128_to_string(arg_uuid, id));
|
|
if (try)
|
|
return 0;
|
|
return -EEXIST;
|
|
}
|
|
|
|
FOREACH_STRING(dirname, "/var", "/var/log", "/var/log/journal") {
|
|
r = userns_mkdir(directory, dirname, 0755, 0, 0);
|
|
if (r < 0) {
|
|
bool ignore = r == -EROFS && try;
|
|
log_full_errno(ignore ? LOG_DEBUG : LOG_ERR, r,
|
|
"Failed to create %s%s: %m", dirname, ignore ? ", ignoring" : "");
|
|
return ignore ? 0 : r;
|
|
}
|
|
}
|
|
|
|
(void) sd_id128_to_string(arg_uuid, id);
|
|
|
|
p = strjoina("/var/log/journal/", id);
|
|
q = prefix_roota(directory, p);
|
|
|
|
if (path_is_mount_point(p, NULL, 0) > 0) {
|
|
if (try)
|
|
return 0;
|
|
|
|
return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
|
|
"%s: already a mount point, refusing to use for journal", p);
|
|
}
|
|
|
|
if (path_is_mount_point(q, NULL, 0) > 0) {
|
|
if (try)
|
|
return 0;
|
|
|
|
return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
|
|
"%s: already a mount point, refusing to use for journal", q);
|
|
}
|
|
|
|
r = readlink_and_make_absolute(p, &d);
|
|
if (r >= 0) {
|
|
if (IN_SET(arg_link_journal, LINK_GUEST, LINK_AUTO) &&
|
|
path_equal(d, q)) {
|
|
|
|
r = userns_mkdir(directory, p, 0755, 0, 0);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to create directory %s: %m", q);
|
|
return 0;
|
|
}
|
|
|
|
if (unlink(p) < 0)
|
|
return log_error_errno(errno, "Failed to remove symlink %s: %m", p);
|
|
} else if (r == -EINVAL) {
|
|
|
|
if (arg_link_journal == LINK_GUEST &&
|
|
rmdir(p) < 0) {
|
|
|
|
if (errno == ENOTDIR) {
|
|
log_error("%s already exists and is neither a symlink nor a directory", p);
|
|
return r;
|
|
} else
|
|
return log_error_errno(errno, "Failed to remove %s: %m", p);
|
|
}
|
|
} else if (r != -ENOENT)
|
|
return log_error_errno(r, "readlink(%s) failed: %m", p);
|
|
|
|
if (arg_link_journal == LINK_GUEST) {
|
|
|
|
if (symlink(q, p) < 0) {
|
|
if (try) {
|
|
log_debug_errno(errno, "Failed to symlink %s to %s, skipping journal setup: %m", q, p);
|
|
return 0;
|
|
} else
|
|
return log_error_errno(errno, "Failed to symlink %s to %s: %m", q, p);
|
|
}
|
|
|
|
r = userns_mkdir(directory, p, 0755, 0, 0);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to create directory %s: %m", q);
|
|
return 0;
|
|
}
|
|
|
|
if (arg_link_journal == LINK_HOST) {
|
|
/* don't create parents here — if the host doesn't have
|
|
* permanent journal set up, don't force it here */
|
|
|
|
r = mkdir_errno_wrapper(p, 0755);
|
|
if (r < 0 && r != -EEXIST) {
|
|
if (try) {
|
|
log_debug_errno(r, "Failed to create %s, skipping journal setup: %m", p);
|
|
return 0;
|
|
} else
|
|
return log_error_errno(r, "Failed to create %s: %m", p);
|
|
}
|
|
|
|
} else if (access(p, F_OK) < 0)
|
|
return 0;
|
|
|
|
if (dir_is_empty(q) == 0)
|
|
log_warning("%s is not empty, proceeding anyway.", q);
|
|
|
|
r = userns_mkdir(directory, p, 0755, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create %s: %m", q);
|
|
|
|
r = mount_nofollow_verbose(LOG_DEBUG, p, q, NULL, MS_BIND, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to bind mount journal from host into guest: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int drop_capabilities(uid_t uid) {
|
|
CapabilityQuintet q;
|
|
|
|
/* Let's initialize all five capability sets to something valid. If the quintet was configured via
|
|
* OCI use that, but fill in missing bits. If it wasn't then derive the quintet in full from
|
|
* arg_caps_retain. */
|
|
|
|
if (capability_quintet_is_set(&arg_full_capabilities)) {
|
|
q = arg_full_capabilities;
|
|
|
|
if (q.bounding == (uint64_t) -1)
|
|
q.bounding = uid == 0 ? arg_caps_retain : 0;
|
|
|
|
if (q.effective == (uint64_t) -1)
|
|
q.effective = uid == 0 ? q.bounding : 0;
|
|
|
|
if (q.inheritable == (uint64_t) -1)
|
|
q.inheritable = uid == 0 ? q.bounding : arg_caps_ambient;
|
|
|
|
if (q.permitted == (uint64_t) -1)
|
|
q.permitted = uid == 0 ? q.bounding : arg_caps_ambient;
|
|
|
|
if (q.ambient == (uint64_t) -1 && ambient_capabilities_supported())
|
|
q.ambient = arg_caps_ambient;
|
|
|
|
if (capability_quintet_mangle(&q))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Cannot set capabilities that are not in the current bounding set.");
|
|
|
|
} else {
|
|
q = (CapabilityQuintet) {
|
|
.bounding = arg_caps_retain,
|
|
.effective = uid == 0 ? arg_caps_retain : 0,
|
|
.inheritable = uid == 0 ? arg_caps_retain : arg_caps_ambient,
|
|
.permitted = uid == 0 ? arg_caps_retain : arg_caps_ambient,
|
|
.ambient = ambient_capabilities_supported() ? arg_caps_ambient : (uint64_t) -1,
|
|
};
|
|
|
|
/* If we're not using OCI, proceed with mangled capabilities (so we don't error out)
|
|
* in order to maintain the same behavior as systemd < 242. */
|
|
if (capability_quintet_mangle(&q))
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_WARNING,
|
|
"Some capabilities will not be set because they are not in the current bounding set.");
|
|
|
|
}
|
|
|
|
return capability_quintet_enforce(&q);
|
|
}
|
|
|
|
static int reset_audit_loginuid(void) {
|
|
_cleanup_free_ char *p = NULL;
|
|
int r;
|
|
|
|
if ((arg_clone_ns_flags & CLONE_NEWPID) == 0)
|
|
return 0;
|
|
|
|
r = read_one_line_file("/proc/self/loginuid", &p);
|
|
if (r == -ENOENT)
|
|
return 0;
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read /proc/self/loginuid: %m");
|
|
|
|
/* Already reset? */
|
|
if (streq(p, "4294967295"))
|
|
return 0;
|
|
|
|
r = write_string_file("/proc/self/loginuid", "4294967295", WRITE_STRING_FILE_DISABLE_BUFFER);
|
|
if (r < 0) {
|
|
log_error_errno(r,
|
|
"Failed to reset audit login UID. This probably means that your kernel is too\n"
|
|
"old and you have audit enabled. Note that the auditing subsystem is known to\n"
|
|
"be incompatible with containers on old kernels. Please make sure to upgrade\n"
|
|
"your kernel or to off auditing with 'audit=0' on the kernel command line before\n"
|
|
"using systemd-nspawn. Sleeping for 5s... (%m)");
|
|
|
|
sleep(5);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_propagate(const char *root) {
|
|
const char *p, *q;
|
|
int r;
|
|
|
|
(void) mkdir_p("/run/systemd/nspawn/", 0755);
|
|
(void) mkdir_p("/run/systemd/nspawn/propagate", 0600);
|
|
p = strjoina("/run/systemd/nspawn/propagate/", arg_machine);
|
|
(void) mkdir_p(p, 0600);
|
|
|
|
r = userns_mkdir(root, "/run/host", 0755, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create /run/host: %m");
|
|
|
|
r = userns_mkdir(root, "/run/host/incoming", 0600, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create /run/host/incoming: %m");
|
|
|
|
q = prefix_roota(root, "/run/host/incoming");
|
|
r = mount_nofollow_verbose(LOG_ERR, p, q, NULL, MS_BIND, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = mount_nofollow_verbose(LOG_ERR, NULL, q, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* machined will MS_MOVE into that directory, and that's only supported for non-shared mounts. */
|
|
return mount_nofollow_verbose(LOG_ERR, NULL, q, NULL, MS_SLAVE, NULL);
|
|
}
|
|
|
|
static int setup_machine_id(const char *directory) {
|
|
const char *etc_machine_id;
|
|
sd_id128_t id;
|
|
int r;
|
|
|
|
/* If the UUID in the container is already set, then that's what counts, and we use. If it isn't set, and the
|
|
* caller passed --uuid=, then we'll pass it in the $container_uuid env var to PID 1 of the container. The
|
|
* assumption is that PID 1 will then write it to /etc/machine-id to make it persistent. If --uuid= is not
|
|
* passed we generate a random UUID, and pass it via $container_uuid. In effect this means that /etc/machine-id
|
|
* in the container and our idea of the container UUID will always be in sync (at least if PID 1 in the
|
|
* container behaves nicely). */
|
|
|
|
etc_machine_id = prefix_roota(directory, "/etc/machine-id");
|
|
|
|
r = id128_read(etc_machine_id, ID128_PLAIN_OR_UNINIT, &id);
|
|
if (r < 0) {
|
|
if (!IN_SET(r, -ENOENT, -ENOMEDIUM)) /* If the file is missing or empty, we don't mind */
|
|
return log_error_errno(r, "Failed to read machine ID from container image: %m");
|
|
|
|
if (sd_id128_is_null(arg_uuid)) {
|
|
r = sd_id128_randomize(&arg_uuid);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to acquire randomized machine UUID: %m");
|
|
}
|
|
} else {
|
|
if (sd_id128_is_null(id))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Machine ID in container image is zero, refusing.");
|
|
|
|
arg_uuid = id;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int recursive_chown(const char *directory, uid_t shift, uid_t range) {
|
|
int r;
|
|
|
|
assert(directory);
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_NO || !arg_userns_chown)
|
|
return 0;
|
|
|
|
r = path_patch_uid(directory, arg_uid_shift, arg_uid_range);
|
|
if (r == -EOPNOTSUPP)
|
|
return log_error_errno(r, "Automatic UID/GID adjusting is only supported for UID/GID ranges starting at multiples of 2^16 with a range of 2^16.");
|
|
if (r == -EBADE)
|
|
return log_error_errno(r, "Upper 16 bits of root directory UID and GID do not match.");
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to adjust UID/GID shift of OS tree: %m");
|
|
if (r == 0)
|
|
log_debug("Root directory of image is already owned by the right UID/GID range, skipping recursive chown operation.");
|
|
else
|
|
log_debug("Patched directory tree to match UID/GID range.");
|
|
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Return values:
|
|
* < 0 : wait_for_terminate() failed to get the state of the
|
|
* container, the container was terminated by a signal, or
|
|
* failed for an unknown reason. No change is made to the
|
|
* container argument.
|
|
* > 0 : The program executed in the container terminated with an
|
|
* error. The exit code of the program executed in the
|
|
* container is returned. The container argument has been set
|
|
* to CONTAINER_TERMINATED.
|
|
* 0 : The container is being rebooted, has been shut down or exited
|
|
* successfully. The container argument has been set to either
|
|
* CONTAINER_TERMINATED or CONTAINER_REBOOTED.
|
|
*
|
|
* That is, success is indicated by a return value of zero, and an
|
|
* error is indicated by a non-zero value.
|
|
*/
|
|
static int wait_for_container(pid_t pid, ContainerStatus *container) {
|
|
siginfo_t status;
|
|
int r;
|
|
|
|
r = wait_for_terminate(pid, &status);
|
|
if (r < 0)
|
|
return log_warning_errno(r, "Failed to wait for container: %m");
|
|
|
|
switch (status.si_code) {
|
|
|
|
case CLD_EXITED:
|
|
if (status.si_status == 0)
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s exited successfully.", arg_machine);
|
|
else
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s failed with error code %i.", arg_machine, status.si_status);
|
|
|
|
*container = CONTAINER_TERMINATED;
|
|
return status.si_status;
|
|
|
|
case CLD_KILLED:
|
|
if (status.si_status == SIGINT) {
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s has been shut down.", arg_machine);
|
|
*container = CONTAINER_TERMINATED;
|
|
return 0;
|
|
|
|
} else if (status.si_status == SIGHUP) {
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s is being rebooted.", arg_machine);
|
|
*container = CONTAINER_REBOOTED;
|
|
return 0;
|
|
}
|
|
|
|
_fallthrough_;
|
|
case CLD_DUMPED:
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Container %s terminated by signal %s.", arg_machine, signal_to_string(status.si_status));
|
|
|
|
default:
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Container %s failed due to unknown reason.", arg_machine);
|
|
}
|
|
}
|
|
|
|
static int on_orderly_shutdown(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
|
|
pid_t pid;
|
|
|
|
pid = PTR_TO_PID(userdata);
|
|
if (pid > 0) {
|
|
if (kill(pid, arg_kill_signal) >= 0) {
|
|
log_info("Trying to halt container. Send SIGTERM again to trigger immediate termination.");
|
|
sd_event_source_set_userdata(s, NULL);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
sd_event_exit(sd_event_source_get_event(s), 0);
|
|
return 0;
|
|
}
|
|
|
|
static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *ssi, void *userdata) {
|
|
pid_t pid;
|
|
|
|
assert(s);
|
|
assert(ssi);
|
|
|
|
pid = PTR_TO_PID(userdata);
|
|
|
|
for (;;) {
|
|
siginfo_t si = {};
|
|
|
|
if (waitid(P_ALL, 0, &si, WNOHANG|WNOWAIT|WEXITED) < 0)
|
|
return log_error_errno(errno, "Failed to waitid(): %m");
|
|
if (si.si_pid == 0) /* No pending children. */
|
|
break;
|
|
if (si.si_pid == pid) {
|
|
/* The main process we care for has exited. Return from
|
|
* signal handler but leave the zombie. */
|
|
sd_event_exit(sd_event_source_get_event(s), 0);
|
|
break;
|
|
}
|
|
|
|
/* Reap all other children. */
|
|
(void) waitid(P_PID, si.si_pid, &si, WNOHANG|WEXITED);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int on_request_stop(sd_bus_message *m, void *userdata, sd_bus_error *error) {
|
|
pid_t pid;
|
|
|
|
assert(m);
|
|
|
|
pid = PTR_TO_PID(userdata);
|
|
|
|
if (arg_kill_signal > 0) {
|
|
log_info("Container termination requested. Attempting to halt container.");
|
|
(void) kill(pid, arg_kill_signal);
|
|
} else {
|
|
log_info("Container termination requested. Exiting.");
|
|
sd_event_exit(sd_bus_get_event(sd_bus_message_get_bus(m)), 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int determine_names(void) {
|
|
int r;
|
|
|
|
if (arg_template && !arg_directory && arg_machine) {
|
|
|
|
/* If --template= was specified then we should not
|
|
* search for a machine, but instead create a new one
|
|
* in /var/lib/machine. */
|
|
|
|
arg_directory = path_join("/var/lib/machines", arg_machine);
|
|
if (!arg_directory)
|
|
return log_oom();
|
|
}
|
|
|
|
if (!arg_image && !arg_directory) {
|
|
if (arg_machine) {
|
|
_cleanup_(image_unrefp) Image *i = NULL;
|
|
|
|
r = image_find(IMAGE_MACHINE, arg_machine, &i);
|
|
if (r == -ENOENT)
|
|
return log_error_errno(r, "No image for machine '%s'.", arg_machine);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to find image for machine '%s': %m", arg_machine);
|
|
|
|
if (IN_SET(i->type, IMAGE_RAW, IMAGE_BLOCK))
|
|
r = free_and_strdup(&arg_image, i->path);
|
|
else
|
|
r = free_and_strdup(&arg_directory, i->path);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
if (!arg_ephemeral)
|
|
arg_read_only = arg_read_only || i->read_only;
|
|
} else {
|
|
r = safe_getcwd(&arg_directory);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine current directory: %m");
|
|
}
|
|
|
|
if (!arg_directory && !arg_image)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to determine path, please use -D or -i.");
|
|
}
|
|
|
|
if (!arg_machine) {
|
|
if (arg_directory && path_equal(arg_directory, "/"))
|
|
arg_machine = gethostname_malloc();
|
|
else {
|
|
if (arg_image) {
|
|
char *e;
|
|
|
|
arg_machine = strdup(basename(arg_image));
|
|
|
|
/* Truncate suffix if there is one */
|
|
e = endswith(arg_machine, ".raw");
|
|
if (e)
|
|
*e = 0;
|
|
} else
|
|
arg_machine = strdup(basename(arg_directory));
|
|
}
|
|
if (!arg_machine)
|
|
return log_oom();
|
|
|
|
hostname_cleanup(arg_machine);
|
|
if (!hostname_is_valid(arg_machine, 0))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to determine machine name automatically, please use -M.");
|
|
|
|
if (arg_ephemeral) {
|
|
char *b;
|
|
|
|
/* Add a random suffix when this is an
|
|
* ephemeral machine, so that we can run many
|
|
* instances at once without manually having
|
|
* to specify -M each time. */
|
|
|
|
if (asprintf(&b, "%s-%016" PRIx64, arg_machine, random_u64()) < 0)
|
|
return log_oom();
|
|
|
|
free(arg_machine);
|
|
arg_machine = b;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int chase_symlinks_and_update(char **p, unsigned flags) {
|
|
char *chased;
|
|
int r;
|
|
|
|
assert(p);
|
|
|
|
if (!*p)
|
|
return 0;
|
|
|
|
r = chase_symlinks(*p, NULL, flags, &chased, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to resolve path %s: %m", *p);
|
|
|
|
return free_and_replace(*p, chased);
|
|
}
|
|
|
|
static int determine_uid_shift(const char *directory) {
|
|
int r;
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_NO) {
|
|
arg_uid_shift = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (arg_uid_shift == UID_INVALID) {
|
|
struct stat st;
|
|
|
|
r = stat(directory, &st);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to determine UID base of %s: %m", directory);
|
|
|
|
arg_uid_shift = st.st_uid & UINT32_C(0xffff0000);
|
|
|
|
if (arg_uid_shift != (st.st_gid & UINT32_C(0xffff0000)))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"UID and GID base of %s don't match.", directory);
|
|
|
|
arg_uid_range = UINT32_C(0x10000);
|
|
}
|
|
|
|
if (arg_uid_shift > (uid_t) -1 - arg_uid_range)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"UID base too high for UID range.");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned long effective_clone_ns_flags(void) {
|
|
unsigned long flags = arg_clone_ns_flags;
|
|
|
|
if (arg_private_network)
|
|
flags |= CLONE_NEWNET;
|
|
if (arg_use_cgns)
|
|
flags |= CLONE_NEWCGROUP;
|
|
if (arg_userns_mode != USER_NAMESPACE_NO)
|
|
flags |= CLONE_NEWUSER;
|
|
|
|
return flags;
|
|
}
|
|
|
|
static int patch_sysctl(void) {
|
|
|
|
/* This table is inspired by runc's sysctl() function */
|
|
static const struct {
|
|
const char *key;
|
|
bool prefix;
|
|
unsigned long clone_flags;
|
|
} safe_sysctl[] = {
|
|
{ "kernel.hostname", false, CLONE_NEWUTS },
|
|
{ "kernel.domainname", false, CLONE_NEWUTS },
|
|
{ "kernel.msgmax", false, CLONE_NEWIPC },
|
|
{ "kernel.msgmnb", false, CLONE_NEWIPC },
|
|
{ "kernel.msgmni", false, CLONE_NEWIPC },
|
|
{ "kernel.sem", false, CLONE_NEWIPC },
|
|
{ "kernel.shmall", false, CLONE_NEWIPC },
|
|
{ "kernel.shmmax", false, CLONE_NEWIPC },
|
|
{ "kernel.shmmni", false, CLONE_NEWIPC },
|
|
{ "fs.mqueue.", true, CLONE_NEWIPC },
|
|
{ "net.", true, CLONE_NEWNET },
|
|
};
|
|
|
|
unsigned long flags;
|
|
char **k, **v;
|
|
int r;
|
|
|
|
flags = effective_clone_ns_flags();
|
|
|
|
STRV_FOREACH_PAIR(k, v, arg_sysctl) {
|
|
bool good = false;
|
|
size_t i;
|
|
|
|
for (i = 0; i < ELEMENTSOF(safe_sysctl); i++) {
|
|
|
|
if (!FLAGS_SET(flags, safe_sysctl[i].clone_flags))
|
|
continue;
|
|
|
|
if (safe_sysctl[i].prefix)
|
|
good = startswith(*k, safe_sysctl[i].key);
|
|
else
|
|
good = streq(*k, safe_sysctl[i].key);
|
|
|
|
if (good)
|
|
break;
|
|
}
|
|
|
|
if (!good)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Refusing to write to sysctl '%s', as it is not safe in the selected namespaces.", *k);
|
|
|
|
r = sysctl_write(*k, *v);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write sysctl '%s': %m", *k);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int inner_child(
|
|
Barrier *barrier,
|
|
const char *directory,
|
|
bool secondary,
|
|
int kmsg_socket,
|
|
int rtnl_socket,
|
|
int master_pty_socket,
|
|
FDSet *fds,
|
|
char **os_release_pairs) {
|
|
|
|
_cleanup_free_ char *home = NULL;
|
|
char as_uuid[ID128_UUID_STRING_MAX];
|
|
size_t n_env = 1;
|
|
const char *envp[] = {
|
|
"PATH=" DEFAULT_PATH_COMPAT,
|
|
NULL, /* container */
|
|
NULL, /* TERM */
|
|
NULL, /* HOME */
|
|
NULL, /* USER */
|
|
NULL, /* LOGNAME */
|
|
NULL, /* container_uuid */
|
|
NULL, /* LISTEN_FDS */
|
|
NULL, /* LISTEN_PID */
|
|
NULL, /* NOTIFY_SOCKET */
|
|
NULL, /* CREDENTIALS_DIRECTORY */
|
|
NULL
|
|
};
|
|
const char *exec_target;
|
|
_cleanup_strv_free_ char **env_use = NULL;
|
|
int r, which_failed;
|
|
|
|
/* This is the "inner" child process, i.e. the one forked off by the "outer" child process, which is the one
|
|
* the container manager itself forked off. At the time of clone() it gained its own CLONE_NEWNS, CLONE_NEWPID,
|
|
* CLONE_NEWUTS, CLONE_NEWIPC, CLONE_NEWUSER namespaces. Note that it has its own CLONE_NEWNS namespace,
|
|
* separate from the CLONE_NEWNS created for the "outer" child, and also separate from the host's CLONE_NEWNS
|
|
* namespace. The reason for having two levels of CLONE_NEWNS namespaces is that the "inner" one is owned by
|
|
* the CLONE_NEWUSER namespace of the container, while the "outer" one is owned by the host's CLONE_NEWUSER
|
|
* namespace.
|
|
*
|
|
* Note at this point we have no CLONE_NEWNET namespace yet. We'll acquire that one later through
|
|
* unshare(). See below. */
|
|
|
|
assert(barrier);
|
|
assert(directory);
|
|
assert(kmsg_socket >= 0);
|
|
|
|
log_debug("Inner child is initializing.");
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO) {
|
|
/* Tell the parent, that it now can write the UID map. */
|
|
(void) barrier_place(barrier); /* #1 */
|
|
|
|
/* Wait until the parent wrote the UID map */
|
|
if (!barrier_place_and_sync(barrier)) /* #2 */
|
|
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "Parent died too early");
|
|
|
|
/* Become the new root user inside our namespace */
|
|
r = reset_uid_gid();
|
|
if (r < 0)
|
|
return log_error_errno(r, "Couldn't become new root: %m");
|
|
|
|
/* Creating a new user namespace means all MS_SHARED mounts become MS_SLAVE. Let's put them
|
|
* back to MS_SHARED here, since that's what we want as defaults. (This will not reconnect
|
|
* propagation, but simply create new peer groups for all our mounts). */
|
|
r = mount_follow_verbose(LOG_ERR, NULL, "/", NULL, MS_SHARED|MS_REC, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = mount_all(NULL,
|
|
arg_mount_settings | MOUNT_IN_USERNS,
|
|
arg_uid_shift,
|
|
arg_selinux_apifs_context);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!arg_network_namespace_path && arg_private_network) {
|
|
r = unshare(CLONE_NEWNET);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to unshare network namespace: %m");
|
|
|
|
/* Tell the parent that it can setup network interfaces. */
|
|
(void) barrier_place(barrier); /* #3 */
|
|
}
|
|
|
|
r = mount_sysfs(NULL, arg_mount_settings);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Wait until we are cgroup-ified, so that we
|
|
* can mount the right cgroup path writable */
|
|
if (!barrier_place_and_sync(barrier)) /* #4 */
|
|
return log_error_errno(SYNTHETIC_ERRNO(ESRCH),
|
|
"Parent died too early");
|
|
|
|
if (arg_use_cgns) {
|
|
r = unshare(CLONE_NEWCGROUP);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to unshare cgroup namespace: %m");
|
|
r = mount_cgroups(
|
|
"",
|
|
arg_unified_cgroup_hierarchy,
|
|
arg_userns_mode != USER_NAMESPACE_NO,
|
|
arg_uid_shift,
|
|
arg_uid_range,
|
|
arg_selinux_apifs_context,
|
|
true);
|
|
} else
|
|
r = mount_systemd_cgroup_writable("", arg_unified_cgroup_hierarchy);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_boot_id();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_kmsg(kmsg_socket);
|
|
if (r < 0)
|
|
return r;
|
|
kmsg_socket = safe_close(kmsg_socket);
|
|
|
|
r = mount_custom(
|
|
"/",
|
|
arg_custom_mounts,
|
|
arg_n_custom_mounts,
|
|
0,
|
|
arg_selinux_apifs_context,
|
|
MOUNT_NON_ROOT_ONLY | MOUNT_IN_USERNS);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (setsid() < 0)
|
|
return log_error_errno(errno, "setsid() failed: %m");
|
|
|
|
if (arg_private_network)
|
|
(void) loopback_setup();
|
|
|
|
if (arg_expose_ports) {
|
|
r = expose_port_send_rtnl(rtnl_socket);
|
|
if (r < 0)
|
|
return r;
|
|
rtnl_socket = safe_close(rtnl_socket);
|
|
}
|
|
|
|
if (arg_console_mode != CONSOLE_PIPE) {
|
|
_cleanup_close_ int master = -1;
|
|
_cleanup_free_ char *console = NULL;
|
|
|
|
/* Allocate a pty and make it available as /dev/console. */
|
|
master = openpt_allocate(O_RDWR|O_NONBLOCK, &console);
|
|
if (master < 0)
|
|
return log_error_errno(master, "Failed to allocate a pty: %m");
|
|
|
|
r = setup_dev_console(console);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set up /dev/console: %m");
|
|
|
|
r = send_one_fd(master_pty_socket, master, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to send master fd: %m");
|
|
master_pty_socket = safe_close(master_pty_socket);
|
|
|
|
r = setup_stdio_as_dev_console();
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = patch_sysctl();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (arg_oom_score_adjust_set) {
|
|
r = set_oom_score_adjust(arg_oom_score_adjust);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to adjust OOM score: %m");
|
|
}
|
|
|
|
if (arg_cpu_set.set)
|
|
if (sched_setaffinity(0, arg_cpu_set.allocated, arg_cpu_set.set) < 0)
|
|
return log_error_errno(errno, "Failed to set CPU affinity: %m");
|
|
|
|
(void) setup_hostname();
|
|
|
|
if (arg_personality != PERSONALITY_INVALID) {
|
|
r = safe_personality(arg_personality);
|
|
if (r < 0)
|
|
return log_error_errno(r, "personality() failed: %m");
|
|
} else if (secondary) {
|
|
r = safe_personality(PER_LINUX32);
|
|
if (r < 0)
|
|
return log_error_errno(r, "personality() failed: %m");
|
|
}
|
|
|
|
r = setrlimit_closest_all((const struct rlimit *const*) arg_rlimit, &which_failed);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to apply resource limit RLIMIT_%s: %m", rlimit_to_string(which_failed));
|
|
|
|
#if HAVE_SECCOMP
|
|
if (arg_seccomp) {
|
|
|
|
if (is_seccomp_available()) {
|
|
|
|
r = seccomp_load(arg_seccomp);
|
|
if (ERRNO_IS_SECCOMP_FATAL(r))
|
|
return log_error_errno(r, "Failed to install seccomp filter: %m");
|
|
if (r < 0)
|
|
log_debug_errno(r, "Failed to install seccomp filter: %m");
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
r = setup_seccomp(arg_caps_retain, arg_syscall_allow_list, arg_syscall_deny_list);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
#if HAVE_SELINUX
|
|
if (arg_selinux_context)
|
|
if (setexeccon(arg_selinux_context) < 0)
|
|
return log_error_errno(errno, "setexeccon(\"%s\") failed: %m", arg_selinux_context);
|
|
#endif
|
|
|
|
/* Make sure we keep the caps across the uid/gid dropping, so that we can retain some selected caps
|
|
* if we need to later on. */
|
|
if (prctl(PR_SET_KEEPCAPS, 1) < 0)
|
|
return log_error_errno(errno, "Failed to set PR_SET_KEEPCAPS: %m");
|
|
|
|
if (uid_is_valid(arg_uid) || gid_is_valid(arg_gid))
|
|
r = change_uid_gid_raw(arg_uid, arg_gid, arg_supplementary_gids, arg_n_supplementary_gids, arg_console_mode != CONSOLE_PIPE);
|
|
else
|
|
r = change_uid_gid(arg_user, arg_console_mode != CONSOLE_PIPE, &home);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = drop_capabilities(getuid());
|
|
if (r < 0)
|
|
return log_error_errno(r, "Dropping capabilities failed: %m");
|
|
|
|
if (arg_no_new_privileges)
|
|
if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0)
|
|
return log_error_errno(errno, "Failed to disable new privileges: %m");
|
|
|
|
/* LXC sets container=lxc, so follow the scheme here */
|
|
envp[n_env++] = strjoina("container=", arg_container_service_name);
|
|
|
|
envp[n_env] = strv_find_prefix(environ, "TERM=");
|
|
if (envp[n_env])
|
|
n_env++;
|
|
|
|
if (home || !uid_is_valid(arg_uid) || arg_uid == 0)
|
|
if (asprintf((char**)(envp + n_env++), "HOME=%s", home ?: "/root") < 0)
|
|
return log_oom();
|
|
|
|
if (arg_user || !uid_is_valid(arg_uid) || arg_uid == 0)
|
|
if (asprintf((char**)(envp + n_env++), "USER=%s", arg_user ?: "root") < 0 ||
|
|
asprintf((char**)(envp + n_env++), "LOGNAME=%s", arg_user ? arg_user : "root") < 0)
|
|
return log_oom();
|
|
|
|
assert(!sd_id128_is_null(arg_uuid));
|
|
|
|
if (asprintf((char**)(envp + n_env++), "container_uuid=%s", id128_to_uuid_string(arg_uuid, as_uuid)) < 0)
|
|
return log_oom();
|
|
|
|
if (fdset_size(fds) > 0) {
|
|
r = fdset_cloexec(fds, false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to unset O_CLOEXEC for file descriptors.");
|
|
|
|
if ((asprintf((char **)(envp + n_env++), "LISTEN_FDS=%u", fdset_size(fds)) < 0) ||
|
|
(asprintf((char **)(envp + n_env++), "LISTEN_PID=1") < 0))
|
|
return log_oom();
|
|
}
|
|
if (asprintf((char **)(envp + n_env++), "NOTIFY_SOCKET=%s", NSPAWN_NOTIFY_SOCKET_PATH) < 0)
|
|
return log_oom();
|
|
|
|
if (arg_n_credentials > 0) {
|
|
envp[n_env] = strdup("CREDENTIALS_DIRECTORY=/run/host/credentials");
|
|
if (!envp[n_env])
|
|
return log_oom();
|
|
n_env++;
|
|
}
|
|
|
|
env_use = strv_env_merge(3, envp, os_release_pairs, arg_setenv);
|
|
if (!env_use)
|
|
return log_oom();
|
|
|
|
/* Let the parent know that we are ready and
|
|
* wait until the parent is ready with the
|
|
* setup, too... */
|
|
if (!barrier_place_and_sync(barrier)) /* #5 */
|
|
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "Parent died too early");
|
|
|
|
if (arg_chdir)
|
|
if (chdir(arg_chdir) < 0)
|
|
return log_error_errno(errno, "Failed to change to specified working directory %s: %m", arg_chdir);
|
|
|
|
if (arg_start_mode == START_PID2) {
|
|
r = stub_pid1(arg_uuid);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (arg_console_mode != CONSOLE_PIPE) {
|
|
/* So far our pty wasn't controlled by any process. Finally, it's time to change that, if we
|
|
* are configured for that. Acquire it as controlling tty. */
|
|
if (ioctl(STDIN_FILENO, TIOCSCTTY) < 0)
|
|
return log_error_errno(errno, "Failed to acquire controlling TTY: %m");
|
|
}
|
|
|
|
log_debug("Inner child completed, invoking payload.");
|
|
|
|
/* Now, explicitly close the log, so that we then can close all remaining fds. Closing the log explicitly first
|
|
* has the benefit that the logging subsystem knows about it, and is thus ready to be reopened should we need
|
|
* it again. Note that the other fds closed here are at least the locking and barrier fds. */
|
|
log_close();
|
|
log_set_open_when_needed(true);
|
|
|
|
(void) fdset_close_others(fds);
|
|
|
|
if (arg_start_mode == START_BOOT) {
|
|
char **a;
|
|
size_t m;
|
|
|
|
/* Automatically search for the init system */
|
|
|
|
m = strv_length(arg_parameters);
|
|
a = newa(char*, m + 2);
|
|
memcpy_safe(a + 1, arg_parameters, m * sizeof(char*));
|
|
a[1 + m] = NULL;
|
|
|
|
a[0] = (char*) "/usr/lib/systemd/systemd";
|
|
execve(a[0], a, env_use);
|
|
|
|
a[0] = (char*) "/lib/systemd/systemd";
|
|
execve(a[0], a, env_use);
|
|
|
|
a[0] = (char*) "/sbin/init";
|
|
execve(a[0], a, env_use);
|
|
|
|
exec_target = "/usr/lib/systemd/systemd, /lib/systemd/systemd, /sbin/init";
|
|
} else if (!strv_isempty(arg_parameters)) {
|
|
const char *dollar_path;
|
|
|
|
exec_target = arg_parameters[0];
|
|
|
|
/* Use the user supplied search $PATH if there is one, or DEFAULT_PATH_COMPAT if not to search the
|
|
* binary. */
|
|
dollar_path = strv_env_get(env_use, "PATH");
|
|
if (dollar_path) {
|
|
if (setenv("PATH", dollar_path, 1) < 0)
|
|
return log_error_errno(errno, "Failed to update $PATH: %m");
|
|
}
|
|
|
|
execvpe(arg_parameters[0], arg_parameters, env_use);
|
|
} else {
|
|
if (!arg_chdir)
|
|
/* If we cannot change the directory, we'll end up in /, that is expected. */
|
|
(void) chdir(home ?: "/root");
|
|
|
|
execle("/bin/bash", "-bash", NULL, env_use);
|
|
execle("/bin/sh", "-sh", NULL, env_use);
|
|
|
|
exec_target = "/bin/bash, /bin/sh";
|
|
}
|
|
|
|
return log_error_errno(errno, "execv(%s) failed: %m", exec_target);
|
|
}
|
|
|
|
static int setup_notify_child(void) {
|
|
_cleanup_close_ int fd = -1;
|
|
union sockaddr_union sa = {
|
|
.un.sun_family = AF_UNIX,
|
|
.un.sun_path = NSPAWN_NOTIFY_SOCKET_PATH,
|
|
};
|
|
int r;
|
|
|
|
fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to allocate notification socket: %m");
|
|
|
|
(void) mkdir_parents(NSPAWN_NOTIFY_SOCKET_PATH, 0755);
|
|
(void) sockaddr_un_unlink(&sa.un);
|
|
|
|
r = bind(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
|
|
if (r < 0)
|
|
return log_error_errno(errno, "bind(" NSPAWN_NOTIFY_SOCKET_PATH ") failed: %m");
|
|
|
|
r = userns_lchown(NSPAWN_NOTIFY_SOCKET_PATH, 0, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to chown " NSPAWN_NOTIFY_SOCKET_PATH ": %m");
|
|
|
|
r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
|
|
if (r < 0)
|
|
return log_error_errno(r, "SO_PASSCRED failed: %m");
|
|
|
|
return TAKE_FD(fd);
|
|
}
|
|
|
|
static int outer_child(
|
|
Barrier *barrier,
|
|
const char *directory,
|
|
DissectedImage *dissected_image,
|
|
bool secondary,
|
|
int pid_socket,
|
|
int uuid_socket,
|
|
int notify_socket,
|
|
int kmsg_socket,
|
|
int rtnl_socket,
|
|
int uid_shift_socket,
|
|
int master_pty_socket,
|
|
int unified_cgroup_hierarchy_socket,
|
|
FDSet *fds,
|
|
int netns_fd) {
|
|
|
|
_cleanup_strv_free_ char **os_release_pairs = NULL;
|
|
_cleanup_close_ int fd = -1;
|
|
const char *p;
|
|
pid_t pid;
|
|
ssize_t l;
|
|
int r;
|
|
|
|
/* This is the "outer" child process, i.e the one forked off by the container manager itself. It already has
|
|
* its own CLONE_NEWNS namespace (which was created by the clone()). It still lives in the host's CLONE_NEWPID,
|
|
* CLONE_NEWUTS, CLONE_NEWIPC, CLONE_NEWUSER and CLONE_NEWNET namespaces. After it completed a number of
|
|
* initializations a second child (the "inner" one) is forked off it, and it exits. */
|
|
|
|
assert(barrier);
|
|
assert(directory);
|
|
assert(pid_socket >= 0);
|
|
assert(uuid_socket >= 0);
|
|
assert(notify_socket >= 0);
|
|
assert(master_pty_socket >= 0);
|
|
assert(kmsg_socket >= 0);
|
|
|
|
log_debug("Outer child is initializing.");
|
|
|
|
r = load_os_release_pairs_with_prefix("/", "container_host_", &os_release_pairs);
|
|
if (r < 0)
|
|
log_debug_errno(r, "Failed to read os-release from host for container, ignoring: %m");
|
|
|
|
if (prctl(PR_SET_PDEATHSIG, SIGKILL) < 0)
|
|
return log_error_errno(errno, "PR_SET_PDEATHSIG failed: %m");
|
|
|
|
r = reset_audit_loginuid();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Mark everything as slave, so that we still receive mounts from the real root, but don't propagate
|
|
* mounts to the real root. */
|
|
r = mount_follow_verbose(LOG_ERR, NULL, "/", NULL, MS_SLAVE|MS_REC, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (dissected_image) {
|
|
/* If we are operating on a disk image, then mount its root directory now, but leave out the rest. We
|
|
* can read the UID shift from it if we need to. Further down we'll mount the rest, but then with the
|
|
* uid shift known. That way we can mount VFAT file systems shifted to the right place right away. This
|
|
* makes sure ESP partitions and userns are compatible. */
|
|
|
|
r = dissected_image_mount_and_warn(
|
|
dissected_image, directory, arg_uid_shift,
|
|
DISSECT_IMAGE_MOUNT_ROOT_ONLY|DISSECT_IMAGE_DISCARD_ON_LOOP|
|
|
(arg_read_only ? DISSECT_IMAGE_READ_ONLY : DISSECT_IMAGE_FSCK)|
|
|
(arg_start_mode == START_BOOT ? DISSECT_IMAGE_VALIDATE_OS : 0));
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = determine_uid_shift(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO) {
|
|
/* Let the parent know which UID shift we read from the image */
|
|
l = send(uid_shift_socket, &arg_uid_shift, sizeof(arg_uid_shift), MSG_NOSIGNAL);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to send UID shift: %m");
|
|
if (l != sizeof(arg_uid_shift))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Short write while sending UID shift.");
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_PICK) {
|
|
/* When we are supposed to pick the UID shift, the parent will check now whether the UID shift
|
|
* we just read from the image is available. If yes, it will send the UID shift back to us, if
|
|
* not it will pick a different one, and send it back to us. */
|
|
|
|
l = recv(uid_shift_socket, &arg_uid_shift, sizeof(arg_uid_shift), 0);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to recv UID shift: %m");
|
|
if (l != sizeof(arg_uid_shift))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Short read while receiving UID shift.");
|
|
}
|
|
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO,
|
|
"Selected user namespace base " UID_FMT " and range " UID_FMT ".", arg_uid_shift, arg_uid_range);
|
|
}
|
|
|
|
if (path_equal(directory, "/")) {
|
|
/* If the directory we shall boot is the host, let's operate on a bind mount at a different
|
|
* place, so that we can make changes to its mount structure (for example, to implement
|
|
* --volatile=) without this interfering with our ability to access files such as
|
|
* /etc/localtime to copy into the container. Note that we use a fixed place for this
|
|
* (instead of a temporary directory, since we are living in our own mount namspace here
|
|
* already, and thus don't need to be afraid of colliding with anyone else's mounts).*/
|
|
(void) mkdir_p("/run/systemd/nspawn-root", 0755);
|
|
|
|
r = mount_nofollow_verbose(LOG_ERR, "/", "/run/systemd/nspawn-root", NULL, MS_BIND|MS_REC, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
directory = "/run/systemd/nspawn-root";
|
|
}
|
|
|
|
r = setup_pivot_root(
|
|
directory,
|
|
arg_pivot_root_new,
|
|
arg_pivot_root_old);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_volatile_mode(
|
|
directory,
|
|
arg_volatile_mode,
|
|
arg_uid_shift,
|
|
arg_selinux_apifs_context);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = mount_custom(
|
|
directory,
|
|
arg_custom_mounts,
|
|
arg_n_custom_mounts,
|
|
arg_uid_shift,
|
|
arg_selinux_apifs_context,
|
|
MOUNT_ROOT_ONLY);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Make sure we always have a mount that we can move to root later on. */
|
|
if (!path_is_mount_point(directory, NULL, 0)) {
|
|
r = mount_nofollow_verbose(LOG_ERR, directory, directory, NULL, MS_BIND|MS_REC, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (dissected_image) {
|
|
/* Now we know the uid shift, let's now mount everything else that might be in the image. */
|
|
r = dissected_image_mount(dissected_image, directory, arg_uid_shift,
|
|
DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY|DISSECT_IMAGE_DISCARD_ON_LOOP|(arg_read_only ? DISSECT_IMAGE_READ_ONLY : DISSECT_IMAGE_FSCK));
|
|
if (r == -EUCLEAN)
|
|
return log_error_errno(r, "File system check for image failed: %m");
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to mount image file system: %m");
|
|
}
|
|
|
|
if (arg_unified_cgroup_hierarchy == CGROUP_UNIFIED_UNKNOWN) {
|
|
/* OK, we don't know yet which cgroup mode to use yet. Let's figure it out, and tell the parent. */
|
|
|
|
r = detect_unified_cgroup_hierarchy_from_image(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
l = send(unified_cgroup_hierarchy_socket, &arg_unified_cgroup_hierarchy, sizeof(arg_unified_cgroup_hierarchy), MSG_NOSIGNAL);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to send cgroup mode: %m");
|
|
if (l != sizeof(arg_unified_cgroup_hierarchy))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Short write while sending cgroup mode.");
|
|
|
|
unified_cgroup_hierarchy_socket = safe_close(unified_cgroup_hierarchy_socket);
|
|
}
|
|
|
|
/* Mark everything as shared so our mounts get propagated down. This is
|
|
* required to make new bind mounts available in systemd services
|
|
* inside the container that create a new mount namespace.
|
|
* See https://github.com/systemd/systemd/issues/3860
|
|
* Further submounts (such as /dev) done after this will inherit the
|
|
* shared propagation mode.
|
|
*
|
|
* IMPORTANT: Do not overmount the root directory anymore from now on to
|
|
* enable moving the root directory mount to root later on.
|
|
* https://github.com/systemd/systemd/issues/3847#issuecomment-562735251
|
|
*/
|
|
r = mount_nofollow_verbose(LOG_ERR, NULL, directory, NULL, MS_SHARED|MS_REC, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = recursive_chown(directory, arg_uid_shift, arg_uid_range);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = base_filesystem_create(directory, arg_uid_shift, (gid_t) arg_uid_shift);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (arg_read_only && arg_volatile_mode == VOLATILE_NO &&
|
|
!has_custom_root_mount(arg_custom_mounts, arg_n_custom_mounts)) {
|
|
r = bind_remount_recursive(directory, MS_RDONLY, MS_RDONLY, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to make tree read-only: %m");
|
|
}
|
|
|
|
r = mount_all(directory,
|
|
arg_mount_settings,
|
|
arg_uid_shift,
|
|
arg_selinux_apifs_context);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = copy_devnodes(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = make_extra_nodes(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) dev_setup(directory, arg_uid_shift, arg_uid_shift);
|
|
|
|
p = prefix_roota(directory, "/run/host");
|
|
(void) make_inaccessible_nodes(p, arg_uid_shift, arg_uid_shift);
|
|
|
|
r = setup_pts(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_propagate(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_keyring();
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_credentials(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = mount_custom(
|
|
directory,
|
|
arg_custom_mounts,
|
|
arg_n_custom_mounts,
|
|
arg_uid_shift,
|
|
arg_selinux_apifs_context,
|
|
MOUNT_NON_ROOT_ONLY);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_timezone(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_resolv_conf(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_machine_id(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_journal(directory);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* The same stuff as the $container env var, but nicely readable for the entire payload */
|
|
p = prefix_roota(directory, "/run/host/container-manager");
|
|
(void) write_string_file(p, arg_container_service_name, WRITE_STRING_FILE_CREATE);
|
|
|
|
/* The same stuff as the $container_uuid env var */
|
|
p = prefix_roota(directory, "/run/host/container-uuid");
|
|
(void) write_string_filef(p, WRITE_STRING_FILE_CREATE, SD_ID128_UUID_FORMAT_STR, SD_ID128_FORMAT_VAL(arg_uuid));
|
|
|
|
if (!arg_use_cgns) {
|
|
r = mount_cgroups(
|
|
directory,
|
|
arg_unified_cgroup_hierarchy,
|
|
arg_userns_mode != USER_NAMESPACE_NO,
|
|
arg_uid_shift,
|
|
arg_uid_range,
|
|
arg_selinux_apifs_context,
|
|
false);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = mount_move_root(directory);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to move root directory: %m");
|
|
|
|
fd = setup_notify_child();
|
|
if (fd < 0)
|
|
return fd;
|
|
|
|
pid = raw_clone(SIGCHLD|CLONE_NEWNS|
|
|
arg_clone_ns_flags |
|
|
(arg_userns_mode != USER_NAMESPACE_NO ? CLONE_NEWUSER : 0));
|
|
if (pid < 0)
|
|
return log_error_errno(errno, "Failed to fork inner child: %m");
|
|
if (pid == 0) {
|
|
pid_socket = safe_close(pid_socket);
|
|
uuid_socket = safe_close(uuid_socket);
|
|
notify_socket = safe_close(notify_socket);
|
|
uid_shift_socket = safe_close(uid_shift_socket);
|
|
|
|
/* The inner child has all namespaces that are requested, so that we all are owned by the
|
|
* user if user namespaces are turned on. */
|
|
|
|
if (arg_network_namespace_path) {
|
|
r = namespace_enter(-1, -1, netns_fd, -1, -1);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to join network namespace: %m");
|
|
}
|
|
|
|
r = inner_child(barrier, directory, secondary, kmsg_socket, rtnl_socket, master_pty_socket, fds, os_release_pairs);
|
|
if (r < 0)
|
|
_exit(EXIT_FAILURE);
|
|
|
|
_exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
l = send(pid_socket, &pid, sizeof(pid), MSG_NOSIGNAL);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to send PID: %m");
|
|
if (l != sizeof(pid))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Short write while sending PID.");
|
|
|
|
l = send(uuid_socket, &arg_uuid, sizeof(arg_uuid), MSG_NOSIGNAL);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to send machine ID: %m");
|
|
if (l != sizeof(arg_uuid))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO),
|
|
"Short write while sending machine ID.");
|
|
|
|
l = send_one_fd(notify_socket, fd, 0);
|
|
if (l < 0)
|
|
return log_error_errno(l, "Failed to send notify fd: %m");
|
|
|
|
pid_socket = safe_close(pid_socket);
|
|
uuid_socket = safe_close(uuid_socket);
|
|
notify_socket = safe_close(notify_socket);
|
|
master_pty_socket = safe_close(master_pty_socket);
|
|
kmsg_socket = safe_close(kmsg_socket);
|
|
rtnl_socket = safe_close(rtnl_socket);
|
|
netns_fd = safe_close(netns_fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uid_shift_pick(uid_t *shift, LockFile *ret_lock_file) {
|
|
bool tried_hashed = false;
|
|
unsigned n_tries = 100;
|
|
uid_t candidate;
|
|
int r;
|
|
|
|
assert(shift);
|
|
assert(ret_lock_file);
|
|
assert(arg_userns_mode == USER_NAMESPACE_PICK);
|
|
assert(arg_uid_range == 0x10000U);
|
|
|
|
candidate = *shift;
|
|
|
|
(void) mkdir("/run/systemd/nspawn-uid", 0755);
|
|
|
|
for (;;) {
|
|
char lock_path[STRLEN("/run/systemd/nspawn-uid/") + DECIMAL_STR_MAX(uid_t) + 1];
|
|
_cleanup_(release_lock_file) LockFile lf = LOCK_FILE_INIT;
|
|
|
|
if (--n_tries <= 0)
|
|
return -EBUSY;
|
|
|
|
if (candidate < CONTAINER_UID_BASE_MIN || candidate > CONTAINER_UID_BASE_MAX)
|
|
goto next;
|
|
if ((candidate & UINT32_C(0xFFFF)) != 0)
|
|
goto next;
|
|
|
|
xsprintf(lock_path, "/run/systemd/nspawn-uid/" UID_FMT, candidate);
|
|
r = make_lock_file(lock_path, LOCK_EX|LOCK_NB, &lf);
|
|
if (r == -EBUSY) /* Range already taken by another nspawn instance */
|
|
goto next;
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Make some superficial checks whether the range is currently known in the user database */
|
|
if (getpwuid(candidate))
|
|
goto next;
|
|
if (getpwuid(candidate + UINT32_C(0xFFFE)))
|
|
goto next;
|
|
if (getgrgid(candidate))
|
|
goto next;
|
|
if (getgrgid(candidate + UINT32_C(0xFFFE)))
|
|
goto next;
|
|
|
|
*ret_lock_file = lf;
|
|
lf = (struct LockFile) LOCK_FILE_INIT;
|
|
*shift = candidate;
|
|
return 0;
|
|
|
|
next:
|
|
if (arg_machine && !tried_hashed) {
|
|
/* Try to hash the base from the container name */
|
|
|
|
static const uint8_t hash_key[] = {
|
|
0xe1, 0x56, 0xe0, 0xf0, 0x4a, 0xf0, 0x41, 0xaf,
|
|
0x96, 0x41, 0xcf, 0x41, 0x33, 0x94, 0xff, 0x72
|
|
};
|
|
|
|
candidate = (uid_t) siphash24(arg_machine, strlen(arg_machine), hash_key);
|
|
|
|
tried_hashed = true;
|
|
} else
|
|
random_bytes(&candidate, sizeof(candidate));
|
|
|
|
candidate = (candidate % (CONTAINER_UID_BASE_MAX - CONTAINER_UID_BASE_MIN)) + CONTAINER_UID_BASE_MIN;
|
|
candidate &= (uid_t) UINT32_C(0xFFFF0000);
|
|
}
|
|
}
|
|
|
|
static int setup_uid_map(pid_t pid) {
|
|
char uid_map[STRLEN("/proc//uid_map") + DECIMAL_STR_MAX(uid_t) + 1], line[DECIMAL_STR_MAX(uid_t)*3+3+1];
|
|
int r;
|
|
|
|
assert(pid > 1);
|
|
|
|
xsprintf(uid_map, "/proc/" PID_FMT "/uid_map", pid);
|
|
xsprintf(line, UID_FMT " " UID_FMT " " UID_FMT "\n", 0, arg_uid_shift, arg_uid_range);
|
|
r = write_string_file(uid_map, line, WRITE_STRING_FILE_DISABLE_BUFFER);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write UID map: %m");
|
|
|
|
/* We always assign the same UID and GID ranges */
|
|
xsprintf(uid_map, "/proc/" PID_FMT "/gid_map", pid);
|
|
r = write_string_file(uid_map, line, WRITE_STRING_FILE_DISABLE_BUFFER);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to write GID map: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nspawn_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
|
|
char buf[NOTIFY_BUFFER_MAX+1];
|
|
char *p = NULL;
|
|
struct iovec iovec = {
|
|
.iov_base = buf,
|
|
.iov_len = sizeof(buf)-1,
|
|
};
|
|
CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred)) +
|
|
CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)) control;
|
|
struct msghdr msghdr = {
|
|
.msg_iov = &iovec,
|
|
.msg_iovlen = 1,
|
|
.msg_control = &control,
|
|
.msg_controllen = sizeof(control),
|
|
};
|
|
struct ucred *ucred;
|
|
ssize_t n;
|
|
pid_t inner_child_pid;
|
|
_cleanup_strv_free_ char **tags = NULL;
|
|
|
|
assert(userdata);
|
|
|
|
inner_child_pid = PTR_TO_PID(userdata);
|
|
|
|
if (revents != EPOLLIN) {
|
|
log_warning("Got unexpected poll event for notify fd.");
|
|
return 0;
|
|
}
|
|
|
|
n = recvmsg_safe(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
|
|
if (IN_SET(n, -EAGAIN, -EINTR))
|
|
return 0;
|
|
if (n < 0)
|
|
return log_warning_errno(n, "Couldn't read notification socket: %m");
|
|
|
|
cmsg_close_all(&msghdr);
|
|
|
|
ucred = CMSG_FIND_DATA(&msghdr, SOL_SOCKET, SCM_CREDENTIALS, struct ucred);
|
|
if (!ucred || ucred->pid != inner_child_pid) {
|
|
log_debug("Received notify message without valid credentials. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
if ((size_t) n >= sizeof(buf)) {
|
|
log_warning("Received notify message exceeded maximum size. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
buf[n] = 0;
|
|
tags = strv_split(buf, "\n\r");
|
|
if (!tags)
|
|
return log_oom();
|
|
|
|
if (strv_find(tags, "READY=1"))
|
|
(void) sd_notifyf(false, "READY=1\n");
|
|
|
|
p = strv_find_startswith(tags, "STATUS=");
|
|
if (p)
|
|
(void) sd_notifyf(false, "STATUS=Container running: %s", p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setup_notify_parent(sd_event *event, int fd, pid_t *inner_child_pid, sd_event_source **notify_event_source) {
|
|
int r;
|
|
|
|
r = sd_event_add_io(event, notify_event_source, fd, EPOLLIN, nspawn_dispatch_notify_fd, inner_child_pid);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to allocate notify event source: %m");
|
|
|
|
(void) sd_event_source_set_description(*notify_event_source, "nspawn-notify");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int merge_settings(Settings *settings, const char *path) {
|
|
int rl;
|
|
|
|
assert(settings);
|
|
assert(path);
|
|
|
|
/* Copy over bits from the settings, unless they have been explicitly masked by command line switches. Note
|
|
* that this steals the fields of the Settings* structure, and hence modifies it. */
|
|
|
|
if ((arg_settings_mask & SETTING_START_MODE) == 0 &&
|
|
settings->start_mode >= 0) {
|
|
arg_start_mode = settings->start_mode;
|
|
strv_free_and_replace(arg_parameters, settings->parameters);
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_EPHEMERAL) == 0)
|
|
arg_ephemeral = settings->ephemeral;
|
|
|
|
if ((arg_settings_mask & SETTING_DIRECTORY) == 0 &&
|
|
settings->root) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring root directory setting, file %s is not trusted.", path);
|
|
else
|
|
free_and_replace(arg_directory, settings->root);
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_PIVOT_ROOT) == 0 &&
|
|
settings->pivot_root_new) {
|
|
free_and_replace(arg_pivot_root_new, settings->pivot_root_new);
|
|
free_and_replace(arg_pivot_root_old, settings->pivot_root_old);
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_WORKING_DIRECTORY) == 0 &&
|
|
settings->working_directory)
|
|
free_and_replace(arg_chdir, settings->working_directory);
|
|
|
|
if ((arg_settings_mask & SETTING_ENVIRONMENT) == 0 &&
|
|
settings->environment)
|
|
strv_free_and_replace(arg_setenv, settings->environment);
|
|
|
|
if ((arg_settings_mask & SETTING_USER) == 0) {
|
|
|
|
if (settings->user)
|
|
free_and_replace(arg_user, settings->user);
|
|
|
|
if (uid_is_valid(settings->uid))
|
|
arg_uid = settings->uid;
|
|
if (gid_is_valid(settings->gid))
|
|
arg_gid = settings->gid;
|
|
if (settings->n_supplementary_gids > 0) {
|
|
free_and_replace(arg_supplementary_gids, settings->supplementary_gids);
|
|
arg_n_supplementary_gids = settings->n_supplementary_gids;
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_CAPABILITY) == 0) {
|
|
uint64_t plus, minus;
|
|
uint64_t network_minus = 0;
|
|
uint64_t ambient;
|
|
|
|
/* Note that we copy both the simple plus/minus caps here, and the full quintet from the
|
|
* Settings structure */
|
|
|
|
plus = settings->capability;
|
|
minus = settings->drop_capability;
|
|
|
|
if ((arg_settings_mask & SETTING_NETWORK) == 0) {
|
|
if (settings_private_network(settings))
|
|
plus |= UINT64_C(1) << CAP_NET_ADMIN;
|
|
else
|
|
network_minus |= UINT64_C(1) << CAP_NET_ADMIN;
|
|
}
|
|
|
|
if (!arg_settings_trusted && plus != 0) {
|
|
if (settings->capability != 0)
|
|
log_warning("Ignoring Capability= setting, file %s is not trusted.", path);
|
|
} else {
|
|
arg_caps_retain &= ~network_minus;
|
|
arg_caps_retain |= plus;
|
|
}
|
|
|
|
arg_caps_retain &= ~minus;
|
|
|
|
/* Copy the full capabilities over too */
|
|
if (capability_quintet_is_set(&settings->full_capabilities)) {
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring capability settings, file %s is not trusted.", path);
|
|
else
|
|
arg_full_capabilities = settings->full_capabilities;
|
|
}
|
|
|
|
ambient = settings->ambient_capability;
|
|
if (!arg_settings_trusted && ambient != 0)
|
|
log_warning("Ignoring AmbientCapability= setting, file %s is not trusted.", path);
|
|
else
|
|
arg_caps_ambient |= ambient;
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_KILL_SIGNAL) == 0 &&
|
|
settings->kill_signal > 0)
|
|
arg_kill_signal = settings->kill_signal;
|
|
|
|
if ((arg_settings_mask & SETTING_PERSONALITY) == 0 &&
|
|
settings->personality != PERSONALITY_INVALID)
|
|
arg_personality = settings->personality;
|
|
|
|
if ((arg_settings_mask & SETTING_MACHINE_ID) == 0 &&
|
|
!sd_id128_is_null(settings->machine_id)) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring MachineID= setting, file %s is not trusted.", path);
|
|
else
|
|
arg_uuid = settings->machine_id;
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_READ_ONLY) == 0 &&
|
|
settings->read_only >= 0)
|
|
arg_read_only = settings->read_only;
|
|
|
|
if ((arg_settings_mask & SETTING_VOLATILE_MODE) == 0 &&
|
|
settings->volatile_mode != _VOLATILE_MODE_INVALID)
|
|
arg_volatile_mode = settings->volatile_mode;
|
|
|
|
if ((arg_settings_mask & SETTING_CUSTOM_MOUNTS) == 0 &&
|
|
settings->n_custom_mounts > 0) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring TemporaryFileSystem=, Bind= and BindReadOnly= settings, file %s is not trusted.", path);
|
|
else {
|
|
custom_mount_free_all(arg_custom_mounts, arg_n_custom_mounts);
|
|
arg_custom_mounts = TAKE_PTR(settings->custom_mounts);
|
|
arg_n_custom_mounts = settings->n_custom_mounts;
|
|
settings->n_custom_mounts = 0;
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_NETWORK) == 0 &&
|
|
(settings->private_network >= 0 ||
|
|
settings->network_veth >= 0 ||
|
|
settings->network_bridge ||
|
|
settings->network_zone ||
|
|
settings->network_interfaces ||
|
|
settings->network_macvlan ||
|
|
settings->network_ipvlan ||
|
|
settings->network_veth_extra ||
|
|
settings->network_namespace_path)) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring network settings, file %s is not trusted.", path);
|
|
else {
|
|
arg_network_veth = settings_network_veth(settings);
|
|
arg_private_network = settings_private_network(settings);
|
|
|
|
strv_free_and_replace(arg_network_interfaces, settings->network_interfaces);
|
|
strv_free_and_replace(arg_network_macvlan, settings->network_macvlan);
|
|
strv_free_and_replace(arg_network_ipvlan, settings->network_ipvlan);
|
|
strv_free_and_replace(arg_network_veth_extra, settings->network_veth_extra);
|
|
|
|
free_and_replace(arg_network_bridge, settings->network_bridge);
|
|
free_and_replace(arg_network_zone, settings->network_zone);
|
|
|
|
free_and_replace(arg_network_namespace_path, settings->network_namespace_path);
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_EXPOSE_PORTS) == 0 &&
|
|
settings->expose_ports) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring Port= setting, file %s is not trusted.", path);
|
|
else {
|
|
expose_port_free_all(arg_expose_ports);
|
|
arg_expose_ports = TAKE_PTR(settings->expose_ports);
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_USERNS) == 0 &&
|
|
settings->userns_mode != _USER_NAMESPACE_MODE_INVALID) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring PrivateUsers= and PrivateUsersChown= settings, file %s is not trusted.", path);
|
|
else {
|
|
arg_userns_mode = settings->userns_mode;
|
|
arg_uid_shift = settings->uid_shift;
|
|
arg_uid_range = settings->uid_range;
|
|
arg_userns_chown = settings->userns_chown;
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_NOTIFY_READY) == 0)
|
|
arg_notify_ready = settings->notify_ready;
|
|
|
|
if ((arg_settings_mask & SETTING_SYSCALL_FILTER) == 0) {
|
|
|
|
if (!arg_settings_trusted && !strv_isempty(settings->syscall_allow_list))
|
|
log_warning("Ignoring SystemCallFilter= settings, file %s is not trusted.", path);
|
|
else {
|
|
strv_free_and_replace(arg_syscall_allow_list, settings->syscall_allow_list);
|
|
strv_free_and_replace(arg_syscall_deny_list, settings->syscall_deny_list);
|
|
}
|
|
|
|
#if HAVE_SECCOMP
|
|
if (!arg_settings_trusted && settings->seccomp)
|
|
log_warning("Ignoring SECCOMP filter, file %s is not trusted.", path);
|
|
else {
|
|
seccomp_release(arg_seccomp);
|
|
arg_seccomp = TAKE_PTR(settings->seccomp);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
for (rl = 0; rl < _RLIMIT_MAX; rl ++) {
|
|
if ((arg_settings_mask & (SETTING_RLIMIT_FIRST << rl)))
|
|
continue;
|
|
|
|
if (!settings->rlimit[rl])
|
|
continue;
|
|
|
|
if (!arg_settings_trusted) {
|
|
log_warning("Ignoring Limit%s= setting, file '%s' is not trusted.", rlimit_to_string(rl), path);
|
|
continue;
|
|
}
|
|
|
|
free_and_replace(arg_rlimit[rl], settings->rlimit[rl]);
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_HOSTNAME) == 0 &&
|
|
settings->hostname)
|
|
free_and_replace(arg_hostname, settings->hostname);
|
|
|
|
if ((arg_settings_mask & SETTING_NO_NEW_PRIVILEGES) == 0 &&
|
|
settings->no_new_privileges >= 0)
|
|
arg_no_new_privileges = settings->no_new_privileges;
|
|
|
|
if ((arg_settings_mask & SETTING_OOM_SCORE_ADJUST) == 0 &&
|
|
settings->oom_score_adjust_set) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring OOMScoreAdjust= setting, file '%s' is not trusted.", path);
|
|
else {
|
|
arg_oom_score_adjust = settings->oom_score_adjust;
|
|
arg_oom_score_adjust_set = true;
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_CPU_AFFINITY) == 0 &&
|
|
settings->cpu_set.set) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring CPUAffinity= setting, file '%s' is not trusted.", path);
|
|
else {
|
|
cpu_set_reset(&arg_cpu_set);
|
|
arg_cpu_set = settings->cpu_set;
|
|
settings->cpu_set = (CPUSet) {};
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_RESOLV_CONF) == 0 &&
|
|
settings->resolv_conf != _RESOLV_CONF_MODE_INVALID)
|
|
arg_resolv_conf = settings->resolv_conf;
|
|
|
|
if ((arg_settings_mask & SETTING_LINK_JOURNAL) == 0 &&
|
|
settings->link_journal != _LINK_JOURNAL_INVALID) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring journal link setting, file '%s' is not trusted.", path);
|
|
else {
|
|
arg_link_journal = settings->link_journal;
|
|
arg_link_journal_try = settings->link_journal_try;
|
|
}
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_TIMEZONE) == 0 &&
|
|
settings->timezone != _TIMEZONE_MODE_INVALID)
|
|
arg_timezone = settings->timezone;
|
|
|
|
if ((arg_settings_mask & SETTING_SLICE) == 0 &&
|
|
settings->slice) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring slice setting, file '%s' is not trusted.", path);
|
|
else
|
|
free_and_replace(arg_slice, settings->slice);
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_USE_CGNS) == 0 &&
|
|
settings->use_cgns >= 0) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring cgroup namespace setting, file '%s' is not trusted.", path);
|
|
else
|
|
arg_use_cgns = settings->use_cgns;
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_CLONE_NS_FLAGS) == 0 &&
|
|
settings->clone_ns_flags != (unsigned long) -1) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring namespace setting, file '%s' is not trusted.", path);
|
|
else
|
|
arg_clone_ns_flags = settings->clone_ns_flags;
|
|
}
|
|
|
|
if ((arg_settings_mask & SETTING_CONSOLE_MODE) == 0 &&
|
|
settings->console_mode >= 0) {
|
|
|
|
if (!arg_settings_trusted)
|
|
log_warning("Ignoring console mode setting, file '%s' is not trusted.", path);
|
|
else
|
|
arg_console_mode = settings->console_mode;
|
|
}
|
|
|
|
/* The following properties can only be set through the OCI settings logic, not from the command line, hence we
|
|
* don't consult arg_settings_mask for them. */
|
|
|
|
sd_bus_message_unref(arg_property_message);
|
|
arg_property_message = TAKE_PTR(settings->properties);
|
|
|
|
arg_console_width = settings->console_width;
|
|
arg_console_height = settings->console_height;
|
|
|
|
device_node_array_free(arg_extra_nodes, arg_n_extra_nodes);
|
|
arg_extra_nodes = TAKE_PTR(settings->extra_nodes);
|
|
arg_n_extra_nodes = settings->n_extra_nodes;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int load_settings(void) {
|
|
_cleanup_(settings_freep) Settings *settings = NULL;
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
_cleanup_free_ char *p = NULL;
|
|
const char *fn, *i;
|
|
int r;
|
|
|
|
if (arg_oci_bundle)
|
|
return 0;
|
|
|
|
/* If all settings are masked, there's no point in looking for
|
|
* the settings file */
|
|
if (FLAGS_SET(arg_settings_mask, _SETTINGS_MASK_ALL))
|
|
return 0;
|
|
|
|
fn = strjoina(arg_machine, ".nspawn");
|
|
|
|
/* We first look in the admin's directories in /etc and /run */
|
|
FOREACH_STRING(i, "/etc/systemd/nspawn", "/run/systemd/nspawn") {
|
|
_cleanup_free_ char *j = NULL;
|
|
|
|
j = path_join(i, fn);
|
|
if (!j)
|
|
return log_oom();
|
|
|
|
f = fopen(j, "re");
|
|
if (f) {
|
|
p = TAKE_PTR(j);
|
|
|
|
/* By default, we trust configuration from /etc and /run */
|
|
if (arg_settings_trusted < 0)
|
|
arg_settings_trusted = true;
|
|
|
|
break;
|
|
}
|
|
|
|
if (errno != ENOENT)
|
|
return log_error_errno(errno, "Failed to open %s: %m", j);
|
|
}
|
|
|
|
if (!f) {
|
|
/* After that, let's look for a file next to the
|
|
* actual image we shall boot. */
|
|
|
|
if (arg_image) {
|
|
p = file_in_same_dir(arg_image, fn);
|
|
if (!p)
|
|
return log_oom();
|
|
} else if (arg_directory && !path_equal(arg_directory, "/")) {
|
|
p = file_in_same_dir(arg_directory, fn);
|
|
if (!p)
|
|
return log_oom();
|
|
}
|
|
|
|
if (p) {
|
|
f = fopen(p, "re");
|
|
if (!f && errno != ENOENT)
|
|
return log_error_errno(errno, "Failed to open %s: %m", p);
|
|
|
|
/* By default, we do not trust configuration from /var/lib/machines */
|
|
if (arg_settings_trusted < 0)
|
|
arg_settings_trusted = false;
|
|
}
|
|
}
|
|
|
|
if (!f)
|
|
return 0;
|
|
|
|
log_debug("Settings are trusted: %s", yes_no(arg_settings_trusted));
|
|
|
|
r = settings_load(f, p, &settings);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return merge_settings(settings, p);
|
|
}
|
|
|
|
static int load_oci_bundle(void) {
|
|
_cleanup_(settings_freep) Settings *settings = NULL;
|
|
int r;
|
|
|
|
if (!arg_oci_bundle)
|
|
return 0;
|
|
|
|
/* By default let's trust OCI bundles */
|
|
if (arg_settings_trusted < 0)
|
|
arg_settings_trusted = true;
|
|
|
|
r = oci_load(NULL, arg_oci_bundle, &settings);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return merge_settings(settings, arg_oci_bundle);
|
|
}
|
|
|
|
static int run_container(
|
|
DissectedImage *dissected_image,
|
|
bool secondary,
|
|
FDSet *fds,
|
|
char veth_name[IFNAMSIZ], bool *veth_created,
|
|
struct ExposeArgs *expose_args,
|
|
int *master, pid_t *pid, int *ret) {
|
|
|
|
static const struct sigaction sa = {
|
|
.sa_handler = nop_signal_handler,
|
|
.sa_flags = SA_NOCLDSTOP|SA_RESTART,
|
|
};
|
|
|
|
_cleanup_(release_lock_file) LockFile uid_shift_lock = LOCK_FILE_INIT;
|
|
_cleanup_close_ int etc_passwd_lock = -1;
|
|
_cleanup_close_pair_ int
|
|
kmsg_socket_pair[2] = { -1, -1 },
|
|
rtnl_socket_pair[2] = { -1, -1 },
|
|
pid_socket_pair[2] = { -1, -1 },
|
|
uuid_socket_pair[2] = { -1, -1 },
|
|
notify_socket_pair[2] = { -1, -1 },
|
|
uid_shift_socket_pair[2] = { -1, -1 },
|
|
master_pty_socket_pair[2] = { -1, -1 },
|
|
unified_cgroup_hierarchy_socket_pair[2] = { -1, -1};
|
|
|
|
_cleanup_close_ int notify_socket = -1;
|
|
_cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL;
|
|
_cleanup_(sd_event_source_unrefp) sd_event_source *notify_event_source = NULL;
|
|
_cleanup_(sd_event_unrefp) sd_event *event = NULL;
|
|
_cleanup_(pty_forward_freep) PTYForward *forward = NULL;
|
|
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
|
|
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
|
|
ContainerStatus container_status = 0;
|
|
int ifi = 0, r;
|
|
ssize_t l;
|
|
sigset_t mask_chld;
|
|
_cleanup_close_ int child_netns_fd = -1;
|
|
|
|
assert_se(sigemptyset(&mask_chld) == 0);
|
|
assert_se(sigaddset(&mask_chld, SIGCHLD) == 0);
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_PICK) {
|
|
/* When we shall pick the UID/GID range, let's first lock /etc/passwd, so that we can safely
|
|
* check with getpwuid() if the specific user already exists. Note that /etc might be
|
|
* read-only, in which case this will fail with EROFS. But that's really OK, as in that case we
|
|
* can be reasonably sure that no users are going to be added. Note that getpwuid() checks are
|
|
* really just an extra safety net. We kinda assume that the UID range we allocate from is
|
|
* really ours. */
|
|
|
|
etc_passwd_lock = take_etc_passwd_lock(NULL);
|
|
if (etc_passwd_lock < 0 && etc_passwd_lock != -EROFS)
|
|
return log_error_errno(etc_passwd_lock, "Failed to take /etc/passwd lock: %m");
|
|
}
|
|
|
|
r = barrier_create(&barrier);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Cannot initialize IPC barrier: %m");
|
|
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, kmsg_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create kmsg socket pair: %m");
|
|
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, rtnl_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create rtnl socket pair: %m");
|
|
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, pid_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create pid socket pair: %m");
|
|
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, uuid_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create id socket pair: %m");
|
|
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, notify_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create notify socket pair: %m");
|
|
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, master_pty_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create console socket pair: %m");
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO)
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, uid_shift_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create uid shift socket pair: %m");
|
|
|
|
if (arg_unified_cgroup_hierarchy == CGROUP_UNIFIED_UNKNOWN)
|
|
if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, unified_cgroup_hierarchy_socket_pair) < 0)
|
|
return log_error_errno(errno, "Failed to create unified cgroup socket pair: %m");
|
|
|
|
/* Child can be killed before execv(), so handle SIGCHLD in order to interrupt
|
|
* parent's blocking calls and give it a chance to call wait() and terminate. */
|
|
r = sigprocmask(SIG_UNBLOCK, &mask_chld, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to change the signal mask: %m");
|
|
|
|
r = sigaction(SIGCHLD, &sa, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to install SIGCHLD handler: %m");
|
|
|
|
if (arg_network_namespace_path) {
|
|
child_netns_fd = open(arg_network_namespace_path, O_RDONLY|O_NOCTTY|O_CLOEXEC);
|
|
if (child_netns_fd < 0)
|
|
return log_error_errno(errno, "Cannot open file %s: %m", arg_network_namespace_path);
|
|
|
|
r = fd_is_network_ns(child_netns_fd);
|
|
if (r == -EUCLEAN)
|
|
log_debug_errno(r, "Cannot determine if passed network namespace path '%s' really refers to a network namespace, assuming it does.", arg_network_namespace_path);
|
|
else if (r < 0)
|
|
return log_error_errno(r, "Failed to check %s fs type: %m", arg_network_namespace_path);
|
|
else if (r == 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Path %s doesn't refer to a network namespace, refusing.", arg_network_namespace_path);
|
|
}
|
|
|
|
*pid = raw_clone(SIGCHLD|CLONE_NEWNS);
|
|
if (*pid < 0)
|
|
return log_error_errno(errno, "clone() failed%s: %m",
|
|
errno == EINVAL ?
|
|
", do you have namespace support enabled in your kernel? (You need UTS, IPC, PID and NET namespacing built in)" : "");
|
|
|
|
if (*pid == 0) {
|
|
/* The outer child only has a file system namespace. */
|
|
barrier_set_role(&barrier, BARRIER_CHILD);
|
|
|
|
kmsg_socket_pair[0] = safe_close(kmsg_socket_pair[0]);
|
|
rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]);
|
|
pid_socket_pair[0] = safe_close(pid_socket_pair[0]);
|
|
uuid_socket_pair[0] = safe_close(uuid_socket_pair[0]);
|
|
notify_socket_pair[0] = safe_close(notify_socket_pair[0]);
|
|
master_pty_socket_pair[0] = safe_close(master_pty_socket_pair[0]);
|
|
uid_shift_socket_pair[0] = safe_close(uid_shift_socket_pair[0]);
|
|
unified_cgroup_hierarchy_socket_pair[0] = safe_close(unified_cgroup_hierarchy_socket_pair[0]);
|
|
|
|
(void) reset_all_signal_handlers();
|
|
(void) reset_signal_mask();
|
|
|
|
r = outer_child(&barrier,
|
|
arg_directory,
|
|
dissected_image,
|
|
secondary,
|
|
pid_socket_pair[1],
|
|
uuid_socket_pair[1],
|
|
notify_socket_pair[1],
|
|
kmsg_socket_pair[1],
|
|
rtnl_socket_pair[1],
|
|
uid_shift_socket_pair[1],
|
|
master_pty_socket_pair[1],
|
|
unified_cgroup_hierarchy_socket_pair[1],
|
|
fds,
|
|
child_netns_fd);
|
|
if (r < 0)
|
|
_exit(EXIT_FAILURE);
|
|
|
|
_exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
barrier_set_role(&barrier, BARRIER_PARENT);
|
|
|
|
fdset_close(fds);
|
|
|
|
kmsg_socket_pair[1] = safe_close(kmsg_socket_pair[1]);
|
|
rtnl_socket_pair[1] = safe_close(rtnl_socket_pair[1]);
|
|
pid_socket_pair[1] = safe_close(pid_socket_pair[1]);
|
|
uuid_socket_pair[1] = safe_close(uuid_socket_pair[1]);
|
|
notify_socket_pair[1] = safe_close(notify_socket_pair[1]);
|
|
master_pty_socket_pair[1] = safe_close(master_pty_socket_pair[1]);
|
|
uid_shift_socket_pair[1] = safe_close(uid_shift_socket_pair[1]);
|
|
unified_cgroup_hierarchy_socket_pair[1] = safe_close(unified_cgroup_hierarchy_socket_pair[1]);
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO) {
|
|
/* The child just let us know the UID shift it might have read from the image. */
|
|
l = recv(uid_shift_socket_pair[0], &arg_uid_shift, sizeof arg_uid_shift, 0);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to read UID shift: %m");
|
|
if (l != sizeof arg_uid_shift)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading UID shift.");
|
|
|
|
if (arg_userns_mode == USER_NAMESPACE_PICK) {
|
|
/* If we are supposed to pick the UID shift, let's try to use the shift read from the
|
|
* image, but if that's already in use, pick a new one, and report back to the child,
|
|
* which one we now picked. */
|
|
|
|
r = uid_shift_pick(&arg_uid_shift, &uid_shift_lock);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to pick suitable UID/GID range: %m");
|
|
|
|
l = send(uid_shift_socket_pair[0], &arg_uid_shift, sizeof arg_uid_shift, MSG_NOSIGNAL);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to send UID shift: %m");
|
|
if (l != sizeof arg_uid_shift)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short write while writing UID shift.");
|
|
}
|
|
}
|
|
|
|
if (arg_unified_cgroup_hierarchy == CGROUP_UNIFIED_UNKNOWN) {
|
|
/* The child let us know the support cgroup mode it might have read from the image. */
|
|
l = recv(unified_cgroup_hierarchy_socket_pair[0], &arg_unified_cgroup_hierarchy, sizeof(arg_unified_cgroup_hierarchy), 0);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to read cgroup mode: %m");
|
|
if (l != sizeof(arg_unified_cgroup_hierarchy))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading cgroup mode (%zu bytes).%s",
|
|
l, l == 0 ? " The child is most likely dead." : "");
|
|
}
|
|
|
|
/* Wait for the outer child. */
|
|
r = wait_for_terminate_and_check("(sd-namespace)", *pid, WAIT_LOG_ABNORMAL);
|
|
if (r < 0)
|
|
return r;
|
|
if (r != EXIT_SUCCESS)
|
|
return -EIO;
|
|
|
|
/* And now retrieve the PID of the inner child. */
|
|
l = recv(pid_socket_pair[0], pid, sizeof *pid, 0);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to read inner child PID: %m");
|
|
if (l != sizeof *pid)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading inner child PID.");
|
|
|
|
/* We also retrieve container UUID in case it was generated by outer child */
|
|
l = recv(uuid_socket_pair[0], &arg_uuid, sizeof arg_uuid, 0);
|
|
if (l < 0)
|
|
return log_error_errno(errno, "Failed to read container machine ID: %m");
|
|
if (l != sizeof(arg_uuid))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading container machined ID.");
|
|
|
|
/* We also retrieve the socket used for notifications generated by outer child */
|
|
notify_socket = receive_one_fd(notify_socket_pair[0], 0);
|
|
if (notify_socket < 0)
|
|
return log_error_errno(notify_socket,
|
|
"Failed to receive notification socket from the outer child: %m");
|
|
|
|
log_debug("Init process invoked as PID "PID_FMT, *pid);
|
|
|
|
if (arg_userns_mode != USER_NAMESPACE_NO) {
|
|
if (!barrier_place_and_sync(&barrier)) /* #1 */
|
|
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "Child died too early.");
|
|
|
|
r = setup_uid_map(*pid);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) barrier_place(&barrier); /* #2 */
|
|
}
|
|
|
|
if (arg_private_network) {
|
|
if (!arg_network_namespace_path) {
|
|
/* Wait until the child has unshared its network namespace. */
|
|
if (!barrier_place_and_sync(&barrier)) /* #3 */
|
|
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "Child died too early");
|
|
}
|
|
|
|
if (child_netns_fd < 0) {
|
|
/* Make sure we have an open file descriptor to the child's network
|
|
* namespace so it stays alive even if the child exits. */
|
|
r = namespace_open(*pid, NULL, NULL, &child_netns_fd, NULL, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to open child network namespace: %m");
|
|
}
|
|
|
|
r = move_network_interfaces(child_netns_fd, arg_network_interfaces);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (arg_network_veth) {
|
|
r = setup_veth(arg_machine, *pid, veth_name,
|
|
arg_network_bridge || arg_network_zone);
|
|
if (r < 0)
|
|
return r;
|
|
else if (r > 0)
|
|
ifi = r;
|
|
|
|
if (arg_network_bridge) {
|
|
/* Add the interface to a bridge */
|
|
r = setup_bridge(veth_name, arg_network_bridge, false);
|
|
if (r < 0)
|
|
return r;
|
|
if (r > 0)
|
|
ifi = r;
|
|
} else if (arg_network_zone) {
|
|
/* Add the interface to a bridge, possibly creating it */
|
|
r = setup_bridge(veth_name, arg_network_zone, true);
|
|
if (r < 0)
|
|
return r;
|
|
if (r > 0)
|
|
ifi = r;
|
|
}
|
|
}
|
|
|
|
r = setup_veth_extra(arg_machine, *pid, arg_network_veth_extra);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* We created the primary and extra veth links now; let's remember this, so that we know to
|
|
remove them later on. Note that we don't bother with removing veth links that were created
|
|
here when their setup failed half-way, because in that case the kernel should be able to
|
|
remove them on its own, since they cannot be referenced by anything yet. */
|
|
*veth_created = true;
|
|
|
|
r = setup_macvlan(arg_machine, *pid, arg_network_macvlan);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = setup_ipvlan(arg_machine, *pid, arg_network_ipvlan);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (arg_register || !arg_keep_unit) {
|
|
r = sd_bus_default_system(&bus);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to open system bus: %m");
|
|
|
|
r = sd_bus_set_close_on_exit(bus, false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to disable close-on-exit behaviour: %m");
|
|
}
|
|
|
|
if (!arg_keep_unit) {
|
|
/* When a new scope is created for this container, then we'll be registered as its controller, in which
|
|
* case PID 1 will send us a friendly RequestStop signal, when it is asked to terminate the
|
|
* scope. Let's hook into that, and cleanly shut down the container, and print a friendly message. */
|
|
|
|
r = sd_bus_match_signal_async(
|
|
bus,
|
|
NULL,
|
|
"org.freedesktop.systemd1",
|
|
NULL,
|
|
"org.freedesktop.systemd1.Scope",
|
|
"RequestStop",
|
|
on_request_stop, NULL, PID_TO_PTR(*pid));
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to request RequestStop match: %m");
|
|
}
|
|
|
|
if (arg_register) {
|
|
r = register_machine(
|
|
bus,
|
|
arg_machine,
|
|
*pid,
|
|
arg_directory,
|
|
arg_uuid,
|
|
ifi,
|
|
arg_slice,
|
|
arg_custom_mounts, arg_n_custom_mounts,
|
|
arg_kill_signal,
|
|
arg_property,
|
|
arg_property_message,
|
|
arg_keep_unit,
|
|
arg_container_service_name);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
} else if (!arg_keep_unit) {
|
|
r = allocate_scope(
|
|
bus,
|
|
arg_machine,
|
|
*pid,
|
|
arg_slice,
|
|
arg_custom_mounts, arg_n_custom_mounts,
|
|
arg_kill_signal,
|
|
arg_property,
|
|
arg_property_message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
} else if (arg_slice || arg_property)
|
|
log_notice("Machine and scope registration turned off, --slice= and --property= settings will have no effect.");
|
|
|
|
r = create_subcgroup(*pid, arg_keep_unit, arg_unified_cgroup_hierarchy);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sync_cgroup(*pid, arg_unified_cgroup_hierarchy, arg_uid_shift);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = chown_cgroup(*pid, arg_unified_cgroup_hierarchy, arg_uid_shift);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Notify the child that the parent is ready with all
|
|
* its setup (including cgroup-ification), and that
|
|
* the child can now hand over control to the code to
|
|
* run inside the container. */
|
|
(void) barrier_place(&barrier); /* #4 */
|
|
|
|
/* Block SIGCHLD here, before notifying child.
|
|
* process_pty() will handle it with the other signals. */
|
|
assert_se(sigprocmask(SIG_BLOCK, &mask_chld, NULL) >= 0);
|
|
|
|
/* Reset signal to default */
|
|
r = default_signals(SIGCHLD, -1);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to reset SIGCHLD: %m");
|
|
|
|
r = sd_event_new(&event);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to get default event source: %m");
|
|
|
|
(void) sd_event_set_watchdog(event, true);
|
|
|
|
if (bus) {
|
|
r = sd_bus_attach_event(bus, event, 0);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to attach bus to event loop: %m");
|
|
}
|
|
|
|
r = setup_notify_parent(event, notify_socket, PID_TO_PTR(*pid), ¬ify_event_source);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Let the child know that we are ready and wait that the child is completely ready now. */
|
|
if (!barrier_place_and_sync(&barrier)) /* #5 */
|
|
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "Child died too early.");
|
|
|
|
/* At this point we have made use of the UID we picked, and thus nss-systemd/systemd-machined.service
|
|
* will make them appear in getpwuid(), thus we can release the /etc/passwd lock. */
|
|
etc_passwd_lock = safe_close(etc_passwd_lock);
|
|
|
|
(void) sd_notifyf(false,
|
|
"STATUS=Container running.\n"
|
|
"X_NSPAWN_LEADER_PID=" PID_FMT, *pid);
|
|
if (!arg_notify_ready)
|
|
(void) sd_notify(false, "READY=1\n");
|
|
|
|
if (arg_kill_signal > 0) {
|
|
/* Try to kill the init system on SIGINT or SIGTERM */
|
|
(void) sd_event_add_signal(event, NULL, SIGINT, on_orderly_shutdown, PID_TO_PTR(*pid));
|
|
(void) sd_event_add_signal(event, NULL, SIGTERM, on_orderly_shutdown, PID_TO_PTR(*pid));
|
|
} else {
|
|
/* Immediately exit */
|
|
(void) sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
|
|
(void) sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
|
|
}
|
|
|
|
/* Exit when the child exits */
|
|
(void) sd_event_add_signal(event, NULL, SIGCHLD, on_sigchld, PID_TO_PTR(*pid));
|
|
|
|
if (arg_expose_ports) {
|
|
r = expose_port_watch_rtnl(event, rtnl_socket_pair[0], on_address_change, expose_args, &rtnl);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) expose_port_execute(rtnl, &expose_args->fw_ctx, arg_expose_ports, &expose_args->address);
|
|
}
|
|
|
|
rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]);
|
|
|
|
if (arg_console_mode != CONSOLE_PIPE) {
|
|
_cleanup_close_ int fd = -1;
|
|
PTYForwardFlags flags = 0;
|
|
|
|
/* Retrieve the master pty allocated by inner child */
|
|
fd = receive_one_fd(master_pty_socket_pair[0], 0);
|
|
if (fd < 0)
|
|
return log_error_errno(fd, "Failed to receive master pty from the inner child: %m");
|
|
|
|
switch (arg_console_mode) {
|
|
|
|
case CONSOLE_READ_ONLY:
|
|
flags |= PTY_FORWARD_READ_ONLY;
|
|
|
|
_fallthrough_;
|
|
|
|
case CONSOLE_INTERACTIVE:
|
|
flags |= PTY_FORWARD_IGNORE_VHANGUP;
|
|
|
|
r = pty_forward_new(event, fd, flags, &forward);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create PTY forwarder: %m");
|
|
|
|
if (arg_console_width != (unsigned) -1 || arg_console_height != (unsigned) -1)
|
|
(void) pty_forward_set_width_height(forward,
|
|
arg_console_width,
|
|
arg_console_height);
|
|
break;
|
|
|
|
default:
|
|
assert(arg_console_mode == CONSOLE_PASSIVE);
|
|
}
|
|
|
|
*master = TAKE_FD(fd);
|
|
}
|
|
|
|
r = sd_event_loop(event);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to run event loop: %m");
|
|
|
|
if (forward) {
|
|
char last_char = 0;
|
|
|
|
(void) pty_forward_get_last_char(forward, &last_char);
|
|
forward = pty_forward_free(forward);
|
|
|
|
if (!arg_quiet && last_char != '\n')
|
|
putc('\n', stdout);
|
|
}
|
|
|
|
/* Kill if it is not dead yet anyway */
|
|
if (!arg_register && !arg_keep_unit && bus)
|
|
terminate_scope(bus, arg_machine);
|
|
|
|
/* Normally redundant, but better safe than sorry */
|
|
(void) kill(*pid, SIGKILL);
|
|
|
|
if (arg_private_network) {
|
|
/* Move network interfaces back to the parent network namespace. We use `safe_fork`
|
|
* to avoid having to move the parent to the child network namespace. */
|
|
r = safe_fork(NULL, FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_WAIT|FORK_LOG, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (r == 0) {
|
|
_cleanup_close_ int parent_netns_fd = -1;
|
|
|
|
r = namespace_open(getpid(), NULL, NULL, &parent_netns_fd, NULL, NULL);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to open parent network namespace: %m");
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
r = namespace_enter(-1, -1, child_netns_fd, -1, -1);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to enter child network namespace: %m");
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
r = move_network_interfaces(parent_netns_fd, arg_network_interfaces);
|
|
if (r < 0)
|
|
log_error_errno(r, "Failed to move network interfaces back to parent network namespace: %m");
|
|
|
|
_exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
|
|
}
|
|
}
|
|
|
|
r = wait_for_container(*pid, &container_status);
|
|
*pid = 0;
|
|
|
|
/* Tell machined that we are gone. */
|
|
if (bus)
|
|
(void) unregister_machine(bus, arg_machine);
|
|
|
|
if (r < 0)
|
|
/* We failed to wait for the container, or the container exited abnormally. */
|
|
return r;
|
|
if (r > 0 || container_status == CONTAINER_TERMINATED) {
|
|
/* r > 0 → The container exited with a non-zero status.
|
|
* As a special case, we need to replace 133 with a different value,
|
|
* because 133 is special-cased in the service file to reboot the container.
|
|
* otherwise → The container exited with zero status and a reboot was not requested.
|
|
*/
|
|
if (r == EXIT_FORCE_RESTART)
|
|
r = EXIT_FAILURE; /* replace 133 with the general failure code */
|
|
*ret = r;
|
|
return 0; /* finito */
|
|
}
|
|
|
|
/* CONTAINER_REBOOTED, loop again */
|
|
|
|
if (arg_keep_unit) {
|
|
/* Special handling if we are running as a service: instead of simply
|
|
* restarting the machine we want to restart the entire service, so let's
|
|
* inform systemd about this with the special exit code 133. The service
|
|
* file uses RestartForceExitStatus=133 so that this results in a full
|
|
* nspawn restart. This is necessary since we might have cgroup parameters
|
|
* set we want to have flushed out. */
|
|
*ret = EXIT_FORCE_RESTART;
|
|
return 0; /* finito */
|
|
}
|
|
|
|
expose_port_flush(&expose_args->fw_ctx, arg_expose_ports, &expose_args->address);
|
|
|
|
(void) remove_veth_links(veth_name, arg_network_veth_extra);
|
|
*veth_created = false;
|
|
return 1; /* loop again */
|
|
}
|
|
|
|
static int initialize_rlimits(void) {
|
|
/* The default resource limits the kernel passes to PID 1, as per kernel 4.16. Let's pass our container payload
|
|
* the same values as the kernel originally passed to PID 1, in order to minimize differences between host and
|
|
* container execution environments. */
|
|
|
|
static const struct rlimit kernel_defaults[_RLIMIT_MAX] = {
|
|
[RLIMIT_AS] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_CORE] = { 0, RLIM_INFINITY },
|
|
[RLIMIT_CPU] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_DATA] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_FSIZE] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_LOCKS] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_MEMLOCK] = { 65536, 65536 },
|
|
[RLIMIT_MSGQUEUE] = { 819200, 819200 },
|
|
[RLIMIT_NICE] = { 0, 0 },
|
|
[RLIMIT_NOFILE] = { 1024, 4096 },
|
|
[RLIMIT_RSS] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_RTPRIO] = { 0, 0 },
|
|
[RLIMIT_RTTIME] = { RLIM_INFINITY, RLIM_INFINITY },
|
|
[RLIMIT_STACK] = { 8388608, RLIM_INFINITY },
|
|
|
|
/* The kernel scales the default for RLIMIT_NPROC and RLIMIT_SIGPENDING based on the system's amount of
|
|
* RAM. To provide best compatibility we'll read these limits off PID 1 instead of hardcoding them
|
|
* here. This is safe as we know that PID 1 doesn't change these two limits and thus the original
|
|
* kernel's initialization should still be valid during runtime — at least if PID 1 is systemd. Note
|
|
* that PID 1 changes a number of other resource limits during early initialization which is why we
|
|
* don't read the other limits from PID 1 but prefer the static table above. */
|
|
};
|
|
|
|
int rl;
|
|
|
|
for (rl = 0; rl < _RLIMIT_MAX; rl++) {
|
|
/* Let's only fill in what the user hasn't explicitly configured anyway */
|
|
if ((arg_settings_mask & (SETTING_RLIMIT_FIRST << rl)) == 0) {
|
|
const struct rlimit *v;
|
|
struct rlimit buffer;
|
|
|
|
if (IN_SET(rl, RLIMIT_NPROC, RLIMIT_SIGPENDING)) {
|
|
/* For these two let's read the limits off PID 1. See above for an explanation. */
|
|
|
|
if (prlimit(1, rl, NULL, &buffer) < 0)
|
|
return log_error_errno(errno, "Failed to read resource limit RLIMIT_%s of PID 1: %m", rlimit_to_string(rl));
|
|
|
|
v = &buffer;
|
|
} else
|
|
v = kernel_defaults + rl;
|
|
|
|
arg_rlimit[rl] = newdup(struct rlimit, v, 1);
|
|
if (!arg_rlimit[rl])
|
|
return log_oom();
|
|
}
|
|
|
|
if (DEBUG_LOGGING) {
|
|
_cleanup_free_ char *k = NULL;
|
|
|
|
(void) rlimit_format(arg_rlimit[rl], &k);
|
|
log_debug("Setting RLIMIT_%s to %s.", rlimit_to_string(rl), k);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cant_be_in_netns(void) {
|
|
union sockaddr_union sa = {
|
|
.un = {
|
|
.sun_family = AF_UNIX,
|
|
.sun_path = "/run/udev/control",
|
|
},
|
|
};
|
|
char udev_path[STRLEN("/proc//ns/net") + DECIMAL_STR_MAX(pid_t)];
|
|
_cleanup_free_ char *udev_ns = NULL, *our_ns = NULL;
|
|
_cleanup_close_ int fd = -1;
|
|
struct ucred ucred;
|
|
int r;
|
|
|
|
/* Check if we are in the same netns as udev. If we aren't, then device monitoring (and thus waiting
|
|
* for loopback block devices) won't work, and we will hang. Detect this case and exit early with a
|
|
* nice message. */
|
|
|
|
if (!arg_image) /* only matters if --image= us used, i.e. we actually need to use loopback devices */
|
|
return 0;
|
|
|
|
fd = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to allocate udev control socket: %m");
|
|
|
|
if (connect(fd, &sa.un, SOCKADDR_UN_LEN(sa.un)) < 0) {
|
|
|
|
if (errno == ENOENT || ERRNO_IS_DISCONNECT(errno))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
|
|
"Sorry, but --image= requires access to the host's /run/ hierarchy, since we need access to udev.");
|
|
|
|
return log_error_errno(errno, "Failed to connect socket to udev control socket: %m");
|
|
}
|
|
|
|
r = getpeercred(fd, &ucred);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine peer of udev control socket: %m");
|
|
|
|
xsprintf(udev_path, "/proc/" PID_FMT "/ns/net", ucred.pid);
|
|
r = readlink_malloc(udev_path, &udev_ns);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read network namespace of udev: %m");
|
|
|
|
r = readlink_malloc("/proc/self/ns/net", &our_ns);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read our own network namespace: %m");
|
|
|
|
if (!streq(our_ns, udev_ns))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
|
|
"Sorry, but --image= is only supported in the main network namespace, since we need access to udev/AF_NETLINK.");
|
|
return 0;
|
|
}
|
|
|
|
static int run(int argc, char *argv[]) {
|
|
bool secondary = false, remove_directory = false, remove_image = false,
|
|
veth_created = false, remove_tmprootdir = false;
|
|
_cleanup_close_ int master = -1;
|
|
_cleanup_fdset_free_ FDSet *fds = NULL;
|
|
int r, n_fd_passed, ret = EXIT_SUCCESS;
|
|
char veth_name[IFNAMSIZ] = "";
|
|
struct ExposeArgs expose_args = {};
|
|
_cleanup_(release_lock_file) LockFile tree_global_lock = LOCK_FILE_INIT, tree_local_lock = LOCK_FILE_INIT;
|
|
char tmprootdir[] = "/tmp/nspawn-root-XXXXXX";
|
|
_cleanup_(loop_device_unrefp) LoopDevice *loop = NULL;
|
|
_cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
|
|
_cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL;
|
|
_cleanup_(fw_ctx_freep) FirewallContext *fw_ctx = NULL;
|
|
pid_t pid = 0;
|
|
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
r = parse_argv(argc, argv);
|
|
if (r <= 0)
|
|
goto finish;
|
|
|
|
if (geteuid() != 0) {
|
|
r = log_warning_errno(SYNTHETIC_ERRNO(EPERM),
|
|
argc >= 2 ? "Need to be root." :
|
|
"Need to be root (and some arguments are usually required).\nHint: try --help");
|
|
goto finish;
|
|
}
|
|
|
|
r = cant_be_in_netns();
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = initialize_rlimits();
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = load_oci_bundle();
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = determine_names();
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = load_settings();
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = cg_unified();
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to determine whether the unified cgroups hierarchy is used: %m");
|
|
goto finish;
|
|
}
|
|
|
|
r = verify_arguments();
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* Reapply environment settings. */
|
|
(void) detect_unified_cgroup_hierarchy_from_environment();
|
|
|
|
/* Ignore SIGPIPE here, because we use splice() on the ptyfwd stuff and that will generate SIGPIPE if
|
|
* the result is closed. Note that the container payload child will reset signal mask+handler anyway,
|
|
* so just turning this off here means we only turn it off in nspawn itself, not any children. */
|
|
(void) ignore_signals(SIGPIPE, -1);
|
|
|
|
n_fd_passed = sd_listen_fds(false);
|
|
if (n_fd_passed > 0) {
|
|
r = fdset_new_listen_fds(&fds, false);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to collect file descriptors: %m");
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
/* The "default" umask. This is appropriate for most file and directory
|
|
* operations performed by nspawn, and is the umask that will be used for
|
|
* the child. Functions like copy_devnodes() change the umask temporarily. */
|
|
umask(0022);
|
|
|
|
if (arg_directory) {
|
|
assert(!arg_image);
|
|
|
|
/* Safety precaution: let's not allow running images from the live host OS image, as long as
|
|
* /var from the host will propagate into container dynamically (because bad things happen if
|
|
* two systems write to the same /var). Let's allow it for the special cases where /var is
|
|
* either copied (i.e. --ephemeral) or replaced (i.e. --volatile=yes|state). */
|
|
if (path_equal(arg_directory, "/") && !(arg_ephemeral || IN_SET(arg_volatile_mode, VOLATILE_YES, VOLATILE_STATE))) {
|
|
log_error("Spawning container on root directory is not supported. Consider using --ephemeral, --volatile=yes or --volatile=state.");
|
|
r = -EINVAL;
|
|
goto finish;
|
|
}
|
|
|
|
if (arg_ephemeral) {
|
|
_cleanup_free_ char *np = NULL;
|
|
|
|
r = chase_symlinks_and_update(&arg_directory, 0);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* If the specified path is a mount point we generate the new snapshot immediately
|
|
* inside it under a random name. However if the specified is not a mount point we
|
|
* create the new snapshot in the parent directory, just next to it. */
|
|
r = path_is_mount_point(arg_directory, NULL, 0);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to determine whether directory %s is mount point: %m", arg_directory);
|
|
goto finish;
|
|
}
|
|
if (r > 0)
|
|
r = tempfn_random_child(arg_directory, "machine.", &np);
|
|
else
|
|
r = tempfn_random(arg_directory, "machine.", &np);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to generate name for directory snapshot: %m");
|
|
goto finish;
|
|
}
|
|
|
|
/* We take an exclusive lock on this image, since it's our private, ephemeral copy
|
|
* only owned by us and no one else. */
|
|
r = image_path_lock(np, LOCK_EX|LOCK_NB, &tree_global_lock, &tree_local_lock);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to lock %s: %m", np);
|
|
goto finish;
|
|
}
|
|
|
|
{
|
|
BLOCK_SIGNALS(SIGINT);
|
|
r = btrfs_subvol_snapshot(arg_directory, np,
|
|
(arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) |
|
|
BTRFS_SNAPSHOT_FALLBACK_COPY |
|
|
BTRFS_SNAPSHOT_FALLBACK_DIRECTORY |
|
|
BTRFS_SNAPSHOT_RECURSIVE |
|
|
BTRFS_SNAPSHOT_QUOTA |
|
|
BTRFS_SNAPSHOT_SIGINT);
|
|
}
|
|
if (r == -EINTR) {
|
|
log_error_errno(r, "Interrupted while copying file system tree to %s, removed again.", np);
|
|
goto finish;
|
|
}
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to create snapshot %s from %s: %m", np, arg_directory);
|
|
goto finish;
|
|
}
|
|
|
|
free_and_replace(arg_directory, np);
|
|
remove_directory = true;
|
|
} else {
|
|
r = chase_symlinks_and_update(&arg_directory, arg_template ? CHASE_NONEXISTENT : 0);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = image_path_lock(arg_directory, (arg_read_only ? LOCK_SH : LOCK_EX) | LOCK_NB, &tree_global_lock, &tree_local_lock);
|
|
if (r == -EBUSY) {
|
|
log_error_errno(r, "Directory tree %s is currently busy.", arg_directory);
|
|
goto finish;
|
|
}
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to lock %s: %m", arg_directory);
|
|
goto finish;
|
|
}
|
|
|
|
if (arg_template) {
|
|
r = chase_symlinks_and_update(&arg_template, 0);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
{
|
|
BLOCK_SIGNALS(SIGINT);
|
|
r = btrfs_subvol_snapshot(arg_template, arg_directory,
|
|
(arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) |
|
|
BTRFS_SNAPSHOT_FALLBACK_COPY |
|
|
BTRFS_SNAPSHOT_FALLBACK_DIRECTORY |
|
|
BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE |
|
|
BTRFS_SNAPSHOT_RECURSIVE |
|
|
BTRFS_SNAPSHOT_QUOTA |
|
|
BTRFS_SNAPSHOT_SIGINT);
|
|
}
|
|
if (r == -EEXIST)
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO,
|
|
"Directory %s already exists, not populating from template %s.", arg_directory, arg_template);
|
|
else if (r == -EINTR) {
|
|
log_error_errno(r, "Interrupted while copying file system tree to %s, removed again.", arg_directory);
|
|
goto finish;
|
|
} else if (r < 0) {
|
|
log_error_errno(r, "Couldn't create snapshot %s from %s: %m", arg_directory, arg_template);
|
|
goto finish;
|
|
} else
|
|
log_full(arg_quiet ? LOG_DEBUG : LOG_INFO,
|
|
"Populated %s from template %s.", arg_directory, arg_template);
|
|
}
|
|
}
|
|
|
|
if (arg_start_mode == START_BOOT) {
|
|
const char *p;
|
|
|
|
if (arg_pivot_root_new)
|
|
p = prefix_roota(arg_directory, arg_pivot_root_new);
|
|
else
|
|
p = arg_directory;
|
|
|
|
if (path_is_os_tree(p) <= 0) {
|
|
log_error("Directory %s doesn't look like an OS root directory (os-release file is missing). Refusing.", p);
|
|
r = -EINVAL;
|
|
goto finish;
|
|
}
|
|
} else {
|
|
const char *p, *q;
|
|
|
|
if (arg_pivot_root_new)
|
|
p = prefix_roota(arg_directory, arg_pivot_root_new);
|
|
else
|
|
p = arg_directory;
|
|
|
|
q = strjoina(p, "/usr/");
|
|
|
|
if (laccess(q, F_OK) < 0) {
|
|
log_error("Directory %s doesn't look like it has an OS tree. Refusing.", p);
|
|
r = -EINVAL;
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
DissectImageFlags dissect_image_flags = DISSECT_IMAGE_REQUIRE_ROOT | DISSECT_IMAGE_RELAX_VAR_CHECK;
|
|
assert(arg_image);
|
|
assert(!arg_template);
|
|
|
|
r = chase_symlinks_and_update(&arg_image, 0);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (arg_ephemeral) {
|
|
_cleanup_free_ char *np = NULL;
|
|
|
|
r = tempfn_random(arg_image, "machine.", &np);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to generate name for image snapshot: %m");
|
|
goto finish;
|
|
}
|
|
|
|
/* Always take an exclusive lock on our own ephemeral copy. */
|
|
r = image_path_lock(np, LOCK_EX|LOCK_NB, &tree_global_lock, &tree_local_lock);
|
|
if (r < 0) {
|
|
r = log_error_errno(r, "Failed to create image lock: %m");
|
|
goto finish;
|
|
}
|
|
|
|
{
|
|
BLOCK_SIGNALS(SIGINT);
|
|
r = copy_file(arg_image, np, O_EXCL, arg_read_only ? 0400 : 0600, FS_NOCOW_FL, FS_NOCOW_FL, COPY_REFLINK|COPY_CRTIME|COPY_SIGINT);
|
|
}
|
|
if (r == -EINTR) {
|
|
log_error_errno(r, "Interrupted while copying image file to %s, removed again.", np);
|
|
goto finish;
|
|
}
|
|
if (r < 0) {
|
|
r = log_error_errno(r, "Failed to copy image file: %m");
|
|
goto finish;
|
|
}
|
|
|
|
free_and_replace(arg_image, np);
|
|
remove_image = true;
|
|
} else {
|
|
r = image_path_lock(arg_image, (arg_read_only ? LOCK_SH : LOCK_EX) | LOCK_NB, &tree_global_lock, &tree_local_lock);
|
|
if (r == -EBUSY) {
|
|
r = log_error_errno(r, "Disk image %s is currently busy.", arg_image);
|
|
goto finish;
|
|
}
|
|
if (r < 0) {
|
|
r = log_error_errno(r, "Failed to create image lock: %m");
|
|
goto finish;
|
|
}
|
|
|
|
r = verity_settings_load(
|
|
&arg_verity_settings,
|
|
arg_image, NULL, NULL);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to read verity artefacts for %s: %m", arg_image);
|
|
goto finish;
|
|
}
|
|
|
|
if (arg_verity_settings.data_path)
|
|
dissect_image_flags |= DISSECT_IMAGE_NO_PARTITION_TABLE;
|
|
}
|
|
|
|
if (!mkdtemp(tmprootdir)) {
|
|
r = log_error_errno(errno, "Failed to create temporary directory: %m");
|
|
goto finish;
|
|
}
|
|
|
|
remove_tmprootdir = true;
|
|
|
|
arg_directory = strdup(tmprootdir);
|
|
if (!arg_directory) {
|
|
r = log_oom();
|
|
goto finish;
|
|
}
|
|
|
|
r = loop_device_make_by_path(
|
|
arg_image,
|
|
arg_read_only ? O_RDONLY : O_RDWR,
|
|
FLAGS_SET(dissect_image_flags, DISSECT_IMAGE_NO_PARTITION_TABLE) ? 0 : LO_FLAGS_PARTSCAN,
|
|
&loop);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to set up loopback block device: %m");
|
|
goto finish;
|
|
}
|
|
|
|
r = dissect_image_and_warn(
|
|
loop->fd,
|
|
arg_image,
|
|
&arg_verity_settings,
|
|
NULL,
|
|
dissect_image_flags,
|
|
&dissected_image);
|
|
if (r == -ENOPKG) {
|
|
/* dissected_image_and_warn() already printed a brief error message. Extend on that with more details */
|
|
log_notice("Note that the disk image needs to\n"
|
|
" a) either contain only a single MBR partition of type 0x83 that is marked bootable\n"
|
|
" b) or contain a single GPT partition of type 0FC63DAF-8483-4772-8E79-3D69D8477DE4\n"
|
|
" c) or follow https://systemd.io/DISCOVERABLE_PARTITIONS\n"
|
|
" d) or contain a file system without a partition table\n"
|
|
"in order to be bootable with systemd-nspawn.");
|
|
goto finish;
|
|
}
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (!arg_verity_settings.root_hash && dissected_image->can_verity)
|
|
log_notice("Note: image %s contains verity information, but no root hash specified! Proceeding without integrity checking.", arg_image);
|
|
|
|
r = dissected_image_decrypt_interactively(
|
|
dissected_image,
|
|
NULL,
|
|
&arg_verity_settings,
|
|
0,
|
|
&decrypted_image);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* Now that we mounted the image, let's try to remove it again, if it is ephemeral */
|
|
if (remove_image && unlink(arg_image) >= 0)
|
|
remove_image = false;
|
|
}
|
|
|
|
r = custom_mount_prepare_all(arg_directory, arg_custom_mounts, arg_n_custom_mounts);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (arg_console_mode < 0)
|
|
arg_console_mode =
|
|
isatty(STDIN_FILENO) > 0 &&
|
|
isatty(STDOUT_FILENO) > 0 ? CONSOLE_INTERACTIVE : CONSOLE_READ_ONLY;
|
|
|
|
if (arg_console_mode == CONSOLE_PIPE) /* if we pass STDERR on to the container, don't add our own logs into it too */
|
|
arg_quiet = true;
|
|
|
|
if (!arg_quiet)
|
|
log_info("Spawning container %s on %s.\nPress ^] three times within 1s to kill container.",
|
|
arg_machine, arg_image ?: arg_directory);
|
|
|
|
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGWINCH, SIGTERM, SIGINT, -1) >= 0);
|
|
|
|
if (prctl(PR_SET_CHILD_SUBREAPER, 1, 0, 0, 0) < 0) {
|
|
r = log_error_errno(errno, "Failed to become subreaper: %m");
|
|
goto finish;
|
|
}
|
|
|
|
if (arg_expose_ports) {
|
|
r = fw_ctx_new(&fw_ctx);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Cannot expose configured ports, firewall initialization failed: %m");
|
|
goto finish;
|
|
}
|
|
expose_args.fw_ctx = fw_ctx;
|
|
}
|
|
for (;;) {
|
|
r = run_container(dissected_image,
|
|
secondary,
|
|
fds,
|
|
veth_name, &veth_created,
|
|
&expose_args, &master,
|
|
&pid, &ret);
|
|
if (r <= 0)
|
|
break;
|
|
}
|
|
|
|
finish:
|
|
(void) sd_notify(false,
|
|
r == 0 && ret == EXIT_FORCE_RESTART ? "STOPPING=1\nSTATUS=Restarting..." :
|
|
"STOPPING=1\nSTATUS=Terminating...");
|
|
|
|
if (pid > 0)
|
|
(void) kill(pid, SIGKILL);
|
|
|
|
/* Try to flush whatever is still queued in the pty */
|
|
if (master >= 0) {
|
|
(void) copy_bytes(master, STDOUT_FILENO, (uint64_t) -1, 0);
|
|
master = safe_close(master);
|
|
}
|
|
|
|
if (pid > 0)
|
|
(void) wait_for_terminate(pid, NULL);
|
|
|
|
pager_close();
|
|
|
|
if (remove_directory && arg_directory) {
|
|
int k;
|
|
|
|
k = rm_rf(arg_directory, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
|
|
if (k < 0)
|
|
log_warning_errno(k, "Cannot remove '%s', ignoring: %m", arg_directory);
|
|
}
|
|
|
|
if (remove_image && arg_image) {
|
|
if (unlink(arg_image) < 0)
|
|
log_warning_errno(errno, "Can't remove image file '%s', ignoring: %m", arg_image);
|
|
}
|
|
|
|
if (remove_tmprootdir) {
|
|
if (rmdir(tmprootdir) < 0)
|
|
log_debug_errno(errno, "Can't remove temporary root directory '%s', ignoring: %m", tmprootdir);
|
|
}
|
|
|
|
if (arg_machine) {
|
|
const char *p;
|
|
|
|
p = strjoina("/run/systemd/nspawn/propagate/", arg_machine);
|
|
(void) rm_rf(p, REMOVE_ROOT);
|
|
}
|
|
|
|
expose_port_flush(&fw_ctx, arg_expose_ports, &expose_args.address);
|
|
|
|
if (veth_created)
|
|
(void) remove_veth_links(veth_name, arg_network_veth_extra);
|
|
(void) remove_bridge(arg_network_zone);
|
|
|
|
custom_mount_free_all(arg_custom_mounts, arg_n_custom_mounts);
|
|
expose_port_free_all(arg_expose_ports);
|
|
rlimit_free_all(arg_rlimit);
|
|
device_node_array_free(arg_extra_nodes, arg_n_extra_nodes);
|
|
credential_free_all(arg_credentials, arg_n_credentials);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return ret;
|
|
}
|
|
|
|
DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
|