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confile.c
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confile.c
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/* SPDX-License-Identifier: LGPL-2.1+ */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#define __STDC_FORMAT_MACROS
#include <arpa/inet.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <net/if.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include "af_unix.h"
#include "conf.h"
#include "config.h"
#include "confile.h"
#include "confile_utils.h"
#include "../include/netns_ifaddrs.h"
#include "log.h"
#include "lxcseccomp.h"
#include "memory_utils.h"
#include "network.h"
#include "parse.h"
#include "storage/storage.h"
#include "utils.h"
#if HAVE_SYS_PERSONALITY_H
#include <sys/personality.h>
#endif
#ifndef HAVE_STRLCPY
#include "include/strlcpy.h"
#endif
#ifndef HAVE_STRLCAT
#include "include/strlcat.h"
#endif
lxc_log_define(confile, lxc);
#define lxc_config_define(name) \
__hot static int set_config_##name(const char *, const char *, \
struct lxc_conf *, void *); \
__hot static int get_config_##name(const char *, char *, int, \
struct lxc_conf *, void *); \
__hot static int clr_config_##name(const char *, struct lxc_conf *, \
void *);
lxc_config_define(autodev);
lxc_config_define(autodev_tmpfs_size);
lxc_config_define(apparmor_allow_incomplete);
lxc_config_define(apparmor_allow_nesting);
lxc_config_define(apparmor_profile);
lxc_config_define(apparmor_raw);
lxc_config_define(cap_drop);
lxc_config_define(cap_keep);
lxc_config_define(cgroup_controller);
lxc_config_define(cgroup2_controller);
lxc_config_define(cgroup_dir);
lxc_config_define(cgroup_relative);
lxc_config_define(console_buffer_size);
lxc_config_define(console_logfile);
lxc_config_define(console_path);
lxc_config_define(console_rotate);
lxc_config_define(console_size);
lxc_config_define(unsupported_key);
lxc_config_define(environment);
lxc_config_define(ephemeral);
lxc_config_define(execute_cmd);
lxc_config_define(group);
lxc_config_define(hooks);
lxc_config_define(hooks_version);
lxc_config_define(idmaps);
lxc_config_define(includefiles);
lxc_config_define(init_cmd);
lxc_config_define(init_cwd);
lxc_config_define(init_gid);
lxc_config_define(init_uid);
lxc_config_define(jump_table_net);
lxc_config_define(keyring_session);
lxc_config_define(log_file);
lxc_config_define(log_level);
lxc_config_define(log_syslog);
lxc_config_define(monitor);
lxc_config_define(monitor_signal_pdeath);
lxc_config_define(mount);
lxc_config_define(mount_auto);
lxc_config_define(mount_fstab);
lxc_config_define(namespace_clone);
lxc_config_define(namespace_keep);
lxc_config_define(namespace_share);
lxc_config_define(net);
lxc_config_define(net_flags);
lxc_config_define(net_hwaddr);
lxc_config_define(net_ipv4_address);
lxc_config_define(net_ipv4_gateway);
lxc_config_define(net_ipv6_address);
lxc_config_define(net_ipv6_gateway);
lxc_config_define(net_link);
lxc_config_define(net_l2proxy);
lxc_config_define(net_macvlan_mode);
lxc_config_define(net_ipvlan_mode);
lxc_config_define(net_ipvlan_isolation);
lxc_config_define(net_mtu);
lxc_config_define(net_name);
lxc_config_define(net_script_down);
lxc_config_define(net_script_up);
lxc_config_define(net_type);
lxc_config_define(net_veth_mode);
lxc_config_define(net_veth_pair);
lxc_config_define(net_veth_ipv4_route);
lxc_config_define(net_veth_ipv6_route);
lxc_config_define(net_vlan_id);
lxc_config_define(no_new_privs);
lxc_config_define(personality);
lxc_config_define(prlimit);
lxc_config_define(pty_max);
lxc_config_define(rootfs_managed);
lxc_config_define(rootfs_mount);
lxc_config_define(rootfs_options);
lxc_config_define(rootfs_path);
lxc_config_define(seccomp_profile);
lxc_config_define(seccomp_allow_nesting);
lxc_config_define(seccomp_notify_cookie);
lxc_config_define(seccomp_notify_proxy);
lxc_config_define(selinux_context);
lxc_config_define(selinux_context_keyring);
lxc_config_define(signal_halt);
lxc_config_define(signal_reboot);
lxc_config_define(signal_stop);
lxc_config_define(start);
lxc_config_define(tty_max);
lxc_config_define(tty_dir);
lxc_config_define(uts_name);
lxc_config_define(sysctl);
lxc_config_define(proc);
static int set_config_unsupported_key(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
return syserror_set(-EINVAL, "Unsupported config key \"%s\"", key);
}
static int get_config_unsupported_key(const char *key, char *retv, int inlen,
struct lxc_conf *c, void *data)
{
return syserror_set(-EINVAL, "Unsupported config key \"%s\"", key);
}
static int clr_config_unsupported_key(const char *key,
struct lxc_conf *lxc_conf, void *data)
{
return syserror_set(-EINVAL, "Unsupported config key \"%s\"", key);
}
/*
* Important Note:
* If a new config option is added to this table, be aware that
* the order in which the options are places into the table matters.
* That means that more specific options of a namespace have to be
* placed above more generic ones.
*
* For instance: If lxc.ab is placed before lxc.ab.c, the config option
* lxc.ab.c will always be matched to lxc.ab. That is, the lxc.ab.c option
* has to be placed above lxc.ab.
*/
static struct lxc_config_t config_jump_table[] = {
{ "lxc.arch", true, set_config_personality, get_config_personality, clr_config_personality, },
{ "lxc.apparmor.profile", true, set_config_apparmor_profile, get_config_apparmor_profile, clr_config_apparmor_profile, },
{ "lxc.apparmor.allow_incomplete", true, set_config_apparmor_allow_incomplete, get_config_apparmor_allow_incomplete, clr_config_apparmor_allow_incomplete, },
{ "lxc.apparmor.allow_nesting", true, set_config_apparmor_allow_nesting, get_config_apparmor_allow_nesting, clr_config_apparmor_allow_nesting, },
{ "lxc.apparmor.raw", true, set_config_apparmor_raw, get_config_apparmor_raw, clr_config_apparmor_raw, },
{ "lxc.autodev.tmpfs.size", true, set_config_autodev_tmpfs_size, get_config_autodev_tmpfs_size, clr_config_autodev_tmpfs_size, },
{ "lxc.autodev", true, set_config_autodev, get_config_autodev, clr_config_autodev, },
{ "lxc.cap.drop", true, set_config_cap_drop, get_config_cap_drop, clr_config_cap_drop, },
{ "lxc.cap.keep", true, set_config_cap_keep, get_config_cap_keep, clr_config_cap_keep, },
{ "lxc.cgroup2", false, set_config_cgroup2_controller, get_config_cgroup2_controller, clr_config_cgroup2_controller, },
{ "lxc.cgroup.dir", true, set_config_cgroup_dir, get_config_cgroup_dir, clr_config_cgroup_dir, },
{ "lxc.cgroup.relative", true, set_config_cgroup_relative, get_config_cgroup_relative, clr_config_cgroup_relative, },
{ "lxc.cgroup", false, set_config_cgroup_controller, get_config_cgroup_controller, clr_config_cgroup_controller, },
{ "lxc.console.buffer.size", true, set_config_console_buffer_size, get_config_console_buffer_size, clr_config_console_buffer_size, },
{ "lxc.console.logfile", true, set_config_console_logfile, get_config_console_logfile, clr_config_console_logfile, },
{ "lxc.console.path", true, set_config_console_path, get_config_console_path, clr_config_console_path, },
{ "lxc.console.rotate", true, set_config_console_rotate, get_config_console_rotate, clr_config_console_rotate, },
{ "lxc.console.size", true, set_config_console_size, get_config_console_size, clr_config_console_size, },
{ "lxc.environment", true, set_config_environment, get_config_environment, clr_config_environment, },
{ "lxc.ephemeral", true, set_config_ephemeral, get_config_ephemeral, clr_config_ephemeral, },
{ "lxc.execute.cmd", true, set_config_execute_cmd, get_config_execute_cmd, clr_config_execute_cmd, },
{ "lxc.group", true, set_config_group, get_config_group, clr_config_group, },
{ "lxc.hook.autodev", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.clone", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.destroy", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.mount", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.post-stop", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.pre-mount", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.pre-start", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.start", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.start-host", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.stop", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.hook.version", true, set_config_hooks_version, get_config_hooks_version, clr_config_hooks_version, },
{ "lxc.hook", true, set_config_hooks, get_config_hooks, clr_config_hooks, },
{ "lxc.idmap", true, set_config_idmaps, get_config_idmaps, clr_config_idmaps, },
{ "lxc.include", true, set_config_includefiles, get_config_includefiles, clr_config_includefiles, },
{ "lxc.init.cmd", true, set_config_init_cmd, get_config_init_cmd, clr_config_init_cmd, },
{ "lxc.init.gid", true, set_config_init_gid, get_config_init_gid, clr_config_init_gid, },
{ "lxc.init.uid", true, set_config_init_uid, get_config_init_uid, clr_config_init_uid, },
{ "lxc.init.cwd", true, set_config_init_cwd, get_config_init_cwd, clr_config_init_cwd, },
{ "lxc.keyring.session", true, set_config_keyring_session, get_config_keyring_session, clr_config_keyring_session },
{ "lxc.log.file", true, set_config_log_file, get_config_log_file, clr_config_log_file, },
{ "lxc.log.level", true, set_config_log_level, get_config_log_level, clr_config_log_level, },
{ "lxc.log.syslog", true, set_config_log_syslog, get_config_log_syslog, clr_config_log_syslog, },
{ "lxc.monitor.unshare", true, set_config_monitor, get_config_monitor, clr_config_monitor, },
{ "lxc.monitor.signal.pdeath", true, set_config_monitor_signal_pdeath, get_config_monitor_signal_pdeath, clr_config_monitor_signal_pdeath, },
{ "lxc.mount.auto", true, set_config_mount_auto, get_config_mount_auto, clr_config_mount_auto, },
{ "lxc.mount.entry", true, set_config_mount, get_config_mount, clr_config_mount, },
{ "lxc.mount.fstab", true, set_config_mount_fstab, get_config_mount_fstab, clr_config_mount_fstab, },
{ "lxc.namespace.clone", true, set_config_namespace_clone, get_config_namespace_clone, clr_config_namespace_clone, },
{ "lxc.namespace.keep", true, set_config_namespace_keep, get_config_namespace_keep, clr_config_namespace_keep, },
{ "lxc.namespace.share.", false, set_config_namespace_share, get_config_namespace_share, clr_config_namespace_share, },
{ "lxc.net.", false, set_config_jump_table_net, get_config_jump_table_net, clr_config_jump_table_net, },
{ "lxc.net", true, set_config_net, get_config_net, clr_config_net, },
{ "lxc.no_new_privs", true, set_config_no_new_privs, get_config_no_new_privs, clr_config_no_new_privs, },
{ "lxc.prlimit", false, set_config_prlimit, get_config_prlimit, clr_config_prlimit, },
{ "lxc.pty.max", true, set_config_pty_max, get_config_pty_max, clr_config_pty_max, },
{ "lxc.rootfs.managed", true, set_config_rootfs_managed, get_config_rootfs_managed, clr_config_rootfs_managed, },
{ "lxc.rootfs.mount", true, set_config_rootfs_mount, get_config_rootfs_mount, clr_config_rootfs_mount, },
{ "lxc.rootfs.options", true, set_config_rootfs_options, get_config_rootfs_options, clr_config_rootfs_options, },
{ "lxc.rootfs.path", true, set_config_rootfs_path, get_config_rootfs_path, clr_config_rootfs_path, },
{ "lxc.seccomp.allow_nesting", true, set_config_seccomp_allow_nesting, get_config_seccomp_allow_nesting, clr_config_seccomp_allow_nesting, },
{ "lxc.seccomp.notify.cookie", true, set_config_seccomp_notify_cookie, get_config_seccomp_notify_cookie, clr_config_seccomp_notify_cookie, },
{ "lxc.seccomp.notify.proxy", true, set_config_seccomp_notify_proxy, get_config_seccomp_notify_proxy, clr_config_seccomp_notify_proxy, },
{ "lxc.seccomp.profile", true, set_config_seccomp_profile, get_config_seccomp_profile, clr_config_seccomp_profile, },
{ "lxc.selinux.context.keyring", true, set_config_selinux_context_keyring, get_config_selinux_context_keyring, clr_config_selinux_context_keyring },
{ "lxc.selinux.context", true, set_config_selinux_context, get_config_selinux_context, clr_config_selinux_context, },
{ "lxc.signal.halt", true, set_config_signal_halt, get_config_signal_halt, clr_config_signal_halt, },
{ "lxc.signal.reboot", true, set_config_signal_reboot, get_config_signal_reboot, clr_config_signal_reboot, },
{ "lxc.signal.stop", true, set_config_signal_stop, get_config_signal_stop, clr_config_signal_stop, },
{ "lxc.start.auto", true, set_config_start, get_config_start, clr_config_start, },
{ "lxc.start.delay", true, set_config_start, get_config_start, clr_config_start, },
{ "lxc.start.order", true, set_config_start, get_config_start, clr_config_start, },
{ "lxc.tty.dir", true, set_config_tty_dir, get_config_tty_dir, clr_config_tty_dir, },
{ "lxc.tty.max", true, set_config_tty_max, get_config_tty_max, clr_config_tty_max, },
{ "lxc.uts.name", true, set_config_uts_name, get_config_uts_name, clr_config_uts_name, },
{ "lxc.sysctl", false, set_config_sysctl, get_config_sysctl, clr_config_sysctl, },
{ "lxc.proc", false, set_config_proc, get_config_proc, clr_config_proc, },
};
static struct lxc_config_t unsupported_config_key = {
NULL,
false,
set_config_unsupported_key,
get_config_unsupported_key,
clr_config_unsupported_key,
};
struct lxc_config_net_t {
LXC_CONFIG_MEMBERS;
};
static struct lxc_config_net_t config_jump_table_net[] = {
/* If a longer key is added please update. */
#define NETWORK_SUBKEY_SIZE_MAX (STRLITERALLEN("veth.vlan.tagged.id") * 2)
{ "flags", true, set_config_net_flags, get_config_net_flags, clr_config_net_flags, },
{ "hwaddr", true, set_config_net_hwaddr, get_config_net_hwaddr, clr_config_net_hwaddr, },
{ "ipv4.address", true, set_config_net_ipv4_address, get_config_net_ipv4_address, clr_config_net_ipv4_address, },
{ "ipv4.gateway", true, set_config_net_ipv4_gateway, get_config_net_ipv4_gateway, clr_config_net_ipv4_gateway, },
{ "ipv6.address", true, set_config_net_ipv6_address, get_config_net_ipv6_address, clr_config_net_ipv6_address, },
{ "ipv6.gateway", true, set_config_net_ipv6_gateway, get_config_net_ipv6_gateway, clr_config_net_ipv6_gateway, },
{ "link", true, set_config_net_link, get_config_net_link, clr_config_net_link, },
{ "l2proxy", true, set_config_net_l2proxy, get_config_net_l2proxy, clr_config_net_l2proxy, },
{ "macvlan.mode", true, set_config_net_macvlan_mode, get_config_net_macvlan_mode, clr_config_net_macvlan_mode, },
{ "ipvlan.mode", true, set_config_net_ipvlan_mode, get_config_net_ipvlan_mode, clr_config_net_ipvlan_mode, },
{ "ipvlan.isolation", true, set_config_net_ipvlan_isolation, get_config_net_ipvlan_isolation, clr_config_net_ipvlan_isolation, },
{ "mtu", true, set_config_net_mtu, get_config_net_mtu, clr_config_net_mtu, },
{ "name", true, set_config_net_name, get_config_net_name, clr_config_net_name, },
{ "script.down", true, set_config_net_script_down, get_config_net_script_down, clr_config_net_script_down, },
{ "script.up", true, set_config_net_script_up, get_config_net_script_up, clr_config_net_script_up, },
{ "type", true, set_config_net_type, get_config_net_type, clr_config_net_type, },
{ "vlan.id", true, set_config_net_vlan_id, get_config_net_vlan_id, clr_config_net_vlan_id, },
{ "veth.mode", true, set_config_net_veth_mode, get_config_net_veth_mode, clr_config_net_veth_mode, },
{ "veth.pair", true, set_config_net_veth_pair, get_config_net_veth_pair, clr_config_net_veth_pair, },
{ "veth.ipv4.route", true, set_config_net_veth_ipv4_route, get_config_net_veth_ipv4_route, clr_config_net_veth_ipv4_route, },
{ "veth.ipv6.route", true, set_config_net_veth_ipv6_route, get_config_net_veth_ipv6_route, clr_config_net_veth_ipv6_route, },
};
static struct lxc_config_net_t unsupported_config_net_key = {
NULL,
false,
set_config_unsupported_key,
get_config_unsupported_key,
clr_config_unsupported_key,
};
struct lxc_config_t *lxc_get_config_exact(const char *key)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(config_jump_table); i++)
if (strequal(config_jump_table[i].name, key))
return &config_jump_table[i];
return NULL;
}
/* Assume a reasonable subkey size limit. */
#define LXC_SUBKEY_LEN_MAX 256
static inline int match_config_item(const struct lxc_config_t *entry, const char *key)
{
size_t len;
if (entry->strict)
return strequal(entry->name, key);
/* There should be no subkey longer than this. */
len = strnlen(entry->name, LXC_SUBKEY_LEN_MAX);
if (len == LXC_SUBKEY_LEN_MAX)
return error_ret(-E2BIG, "Excessive subkey length");
return strnequal(entry->name, key, len);
}
struct lxc_config_t *lxc_get_config(const char *key)
{
for (size_t i = 0; i < ARRAY_SIZE(config_jump_table); i++) {
struct lxc_config_t *cur = &config_jump_table[i];
switch (match_config_item(cur, key)) {
case 0:
continue;
case -E2BIG:
return &unsupported_config_key;
}
return cur;
}
return &unsupported_config_key;
}
static inline bool match_config_net_item(const struct lxc_config_net_t *entry,
const char *key)
{
if (entry->strict)
return strequal(entry->name, key);
return strnequal(entry->name, key, strlen(entry->name));
}
static struct lxc_config_net_t *lxc_get_config_net(const char *key)
{
for (size_t i = 0; i < ARRAY_SIZE(config_jump_table_net); i++) {
struct lxc_config_net_t *cur = &config_jump_table_net[i];
if (!match_config_net_item(cur, key))
continue;
return cur;
}
return &unsupported_config_net_key;
}
static int set_config_net(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
if (!lxc_config_value_empty(value)) {
ERROR("lxc.net must not have a value");
return -1;
}
return clr_config_net(key, lxc_conf, data);
}
static int set_config_net_type(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
clr_config_net_type(key, lxc_conf, data);
if (lxc_config_value_empty(value))
return 0;
if (strequal(value, "veth")) {
netdev->type = LXC_NET_VETH;
lxc_list_init(&netdev->priv.veth_attr.ipv4_routes);
lxc_list_init(&netdev->priv.veth_attr.ipv6_routes);
lxc_list_init(&netdev->priv.veth_attr.vlan_tagged_ids);
if (!lxc_veth_flag_to_mode(netdev->priv.veth_attr.mode))
lxc_veth_mode_to_flag(&netdev->priv.veth_attr.mode, "bridge");
} else if (strequal(value, "macvlan")) {
netdev->type = LXC_NET_MACVLAN;
if (!lxc_macvlan_flag_to_mode(netdev->priv.veth_attr.mode))
lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode, "private");
} else if (strequal(value, "ipvlan")) {
netdev->type = LXC_NET_IPVLAN;
if (!lxc_ipvlan_flag_to_mode(netdev->priv.ipvlan_attr.mode))
lxc_ipvlan_mode_to_flag(&netdev->priv.ipvlan_attr.mode, "l3");
if (!lxc_ipvlan_flag_to_isolation(netdev->priv.ipvlan_attr.isolation))
lxc_ipvlan_isolation_to_flag(&netdev->priv.ipvlan_attr.isolation, "bridge");
} else if (strequal(value, "vlan")) {
netdev->type = LXC_NET_VLAN;
} else if (strequal(value, "phys")) {
netdev->type = LXC_NET_PHYS;
} else if (strequal(value, "empty")) {
netdev->type = LXC_NET_EMPTY;
} else if (strequal(value, "none")) {
netdev->type = LXC_NET_NONE;
} else {
return log_error(-1, "Invalid network type %s", value);
}
return 0;
}
static int set_config_net_flags(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_flags(key, lxc_conf, data);
netdev->flags |= IFF_UP;
return 0;
}
static int create_matched_ifnames(const char *value, struct lxc_conf *lxc_conf,
struct lxc_netdev *netdev)
{
call_cleaner(netns_freeifaddrs) struct netns_ifaddrs *ifaddr = NULL;
struct netns_ifaddrs *ifa;
int n;
int ret = 0;
const char *type_key = "lxc.net.type";
const char *link_key = "lxc.net.link";
const char *tmpvalue = "phys";
if (netns_getifaddrs(&ifaddr, -1, &(bool){false}) < 0)
return log_error_errno(-1, errno, "Failed to get network interfaces");
for (ifa = ifaddr, n = 0; ifa != NULL; ifa = ifa->ifa_next, n++) {
if (!ifa->ifa_addr)
continue;
if (ifa->ifa_addr->sa_family != AF_PACKET)
continue;
if (strnequal(value, ifa->ifa_name, strlen(value) - 1)) {
ret = set_config_net_type(type_key, tmpvalue, lxc_conf,
netdev);
if (!ret) {
ret = set_config_net_link(
link_key, ifa->ifa_name, lxc_conf, netdev);
if (ret) {
ERROR("Failed to create matched ifnames");
break;
}
} else {
ERROR("Failed to create matched ifnames");
break;
}
}
}
return ret;
}
static int set_config_net_link(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
int ret = 0;
if (!netdev)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_link(key, lxc_conf, data);
if (value[strlen(value) - 1] == '+' && netdev->type == LXC_NET_PHYS)
ret = create_matched_ifnames(value, lxc_conf, netdev);
else
ret = network_ifname(netdev->link, value, sizeof(netdev->link));
return ret;
}
static int set_config_net_l2proxy(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
unsigned int val = 0;
int ret;
if (!netdev)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_l2proxy(key, lxc_conf, data);
ret = lxc_safe_uint(value, &val);
if (ret < 0)
return ret_errno(ret);
switch (val) {
case 0:
netdev->l2proxy = false;
return 0;
case 1:
netdev->l2proxy = true;
return 0;
}
return ret_errno(EINVAL);
}
static int set_config_net_name(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_name(key, lxc_conf, data);
return network_ifname(netdev->name, value, sizeof(netdev->name));
}
static int set_config_net_veth_mode(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_VETH)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_veth_mode(key, lxc_conf, data);
if (!netdev)
return ret_errno(EINVAL);
return lxc_veth_mode_to_flag(&netdev->priv.veth_attr.mode, value);
}
static int set_config_net_veth_pair(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_VETH)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_veth_pair(key, lxc_conf, data);
return network_ifname(netdev->priv.veth_attr.pair, value,
sizeof(netdev->priv.veth_attr.pair));
}
static int set_config_net_macvlan_mode(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_MACVLAN)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_macvlan_mode(key, lxc_conf, data);
return lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode, value);
}
static int set_config_net_ipvlan_mode(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_IPVLAN)
return syserror_set(-EINVAL, "Invalid ipvlan mode \"%s\", can only be used with ipvlan network", value);
if (lxc_config_value_empty(value))
return clr_config_net_ipvlan_mode(key, lxc_conf, data);
return lxc_ipvlan_mode_to_flag(&netdev->priv.ipvlan_attr.mode, value);
}
static int set_config_net_ipvlan_isolation(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_IPVLAN)
return syserror_set(-EINVAL, "Invalid ipvlan isolation \"%s\", can only be used with ipvlan network", value);
if (lxc_config_value_empty(value))
return clr_config_net_ipvlan_isolation(key, lxc_conf, data);
return lxc_ipvlan_isolation_to_flag(&netdev->priv.ipvlan_attr.isolation, value);
}
static int set_config_net_hwaddr(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
__do_free char *new_value = NULL;
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
clr_config_net_hwaddr(key, lxc_conf, data);
if (lxc_config_value_empty(value))
return 0;
new_value = strdup(value);
if (!new_value)
return ret_errno(ENOMEM);
rand_complete_hwaddr(new_value);
if (!lxc_config_value_empty(new_value))
netdev->hwaddr = move_ptr(new_value);
return 0;
}
static int set_config_net_vlan_id(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
int ret;
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_VLAN)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_vlan_id(key, lxc_conf, data);
ret = get_u16(&netdev->priv.vlan_attr.vid, value, 0);
if (ret < 0)
return ret;
return 0;
}
static int set_config_net_mtu(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
clr_config_net_mtu(key, lxc_conf, data);
if (lxc_config_value_empty(value))
return 0;
return set_config_string_item(&netdev->mtu, value);
}
static int set_config_net_ipv4_address(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
__do_free char *addr = NULL;
__do_free struct lxc_inetdev *inetdev = NULL;
__do_free struct lxc_list *list = NULL;
int ret;
struct lxc_netdev *netdev = data;
char *cursor, *slash;
char *bcast = NULL, *prefix = NULL;
if (!netdev)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_ipv4_address(key, lxc_conf, data);
inetdev = zalloc(sizeof(*inetdev));
if (!inetdev)
return ret_errno(ENOMEM);
list = lxc_list_new();
if (!list)
return ret_errno(ENOMEM);
addr = strdup(value);
if (!addr)
return ret_errno(ENOMEM);
cursor = strstr(addr, " ");
if (cursor) {
*cursor = '\0';
bcast = cursor + 1;
}
slash = strstr(addr, "/");
if (slash) {
*slash = '\0';
prefix = slash + 1;
}
ret = inet_pton(AF_INET, addr, &inetdev->addr);
if (!ret || ret < 0)
return log_error_errno(-1, errno, "Invalid ipv4 address \"%s\"", value);
if (bcast) {
ret = inet_pton(AF_INET, bcast, &inetdev->bcast);
if (!ret || ret < 0)
return log_error_errno(-1, errno, "Invalid ipv4 broadcast address \"%s\"", value);
}
/* No prefix specified, determine it from the network class. */
ret = 0;
if (prefix)
ret = lxc_safe_uint(prefix, &inetdev->prefix);
else
inetdev->prefix = config_ip_prefix(&inetdev->addr);
if (ret || inetdev->prefix > 32)
return ret_errno(EINVAL);
/* If no broadcast address, compute one from the prefix and address. */
if (!bcast) {
unsigned int shift = LAST_BIT_PER_TYPE(inetdev->prefix);
inetdev->bcast.s_addr = inetdev->addr.s_addr;
if (inetdev->prefix < shift)
shift = inetdev->prefix;
inetdev->bcast.s_addr |= htonl(INADDR_BROADCAST >> shift);
}
list->elem = inetdev;
lxc_list_add_tail(&netdev->ipv4, list);
move_ptr(inetdev);
move_ptr(list);
return 0;
}
static int set_config_net_ipv4_gateway(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
clr_config_net_ipv4_gateway(key, lxc_conf, data);
if (lxc_config_value_empty(value))
return 0;
if (strequal(value, "auto")) {
netdev->ipv4_gateway = NULL;
netdev->ipv4_gateway_auto = true;
} else if (strequal(value, "dev")) {
netdev->ipv4_gateway = NULL;
netdev->ipv4_gateway_auto = false;
netdev->ipv4_gateway_dev = true;
} else {
__do_free struct in_addr *gw = NULL;
int ret;
gw = zalloc(sizeof(*gw));
if (!gw)
return ret_errno(ENOMEM);
ret = inet_pton(AF_INET, value, gw);
if (!ret || ret < 0)
return log_error_errno(-1, errno, "Invalid ipv4 gateway address \"%s\"", value);
netdev->ipv4_gateway = move_ptr(gw);
netdev->ipv4_gateway_auto = false;
}
return 0;
}
static int set_config_net_veth_ipv4_route(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
__do_free char *valdup = NULL;
__do_free struct lxc_inetdev *inetdev = NULL;
__do_free struct lxc_list *list = NULL;
int ret;
char *netmask, *slash;
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_VETH)
return syserror_set(-EINVAL, "Invalid ipv4 route \"%s\", can only be used with veth network", value);
if (lxc_config_value_empty(value))
return clr_config_net_veth_ipv4_route(key, lxc_conf, data);
inetdev = zalloc(sizeof(*inetdev));
if (!inetdev)
return ret_errno(ENOMEM);
list = lxc_list_new();
if (!list)
return ret_errno(ENOMEM);
list->elem = inetdev;
valdup = strdup(value);
if (!valdup)
return ret_errno(ENOMEM);
slash = strchr(valdup, '/');
if (!slash)
return ret_errno(EINVAL);
*slash = '\0';
slash++;
if (*slash == '\0')
return ret_errno(EINVAL);
netmask = slash;
ret = lxc_safe_uint(netmask, &inetdev->prefix);
if (ret < 0 || inetdev->prefix > 32)
return ret_errno(EINVAL);
ret = inet_pton(AF_INET, valdup, &inetdev->addr);
if (!ret || ret < 0)
return ret_errno(EINVAL);
lxc_list_add_tail(&netdev->priv.veth_attr.ipv4_routes, list);
move_ptr(inetdev);
move_ptr(list);
return 0;
}
static int set_config_net_ipv6_address(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
__do_free char *valdup = NULL;
__do_free struct lxc_inet6dev *inet6dev = NULL;
__do_free struct lxc_list *list = NULL;
int ret;
struct lxc_netdev *netdev = data;
char *slash, *netmask;
if (!netdev)
return ret_errno(EINVAL);
if (lxc_config_value_empty(value))
return clr_config_net_ipv6_address(key, lxc_conf, data);
inet6dev = zalloc(sizeof(*inet6dev));
if (!inet6dev)
return ret_errno(ENOMEM);
list = lxc_list_new();
if (!list)
return ret_errno(ENOMEM);
valdup = strdup(value);
if (!valdup)
return ret_errno(ENOMEM);
inet6dev->prefix = 64;
slash = strstr(valdup, "/");
if (slash) {
*slash = '\0';
netmask = slash + 1;
ret = lxc_safe_uint(netmask, &inet6dev->prefix);
if (ret < 0)
return ret;
}
ret = inet_pton(AF_INET6, valdup, &inet6dev->addr);
if (!ret || ret < 0)
return log_error_errno(-EINVAL, EINVAL, "Invalid ipv6 address \"%s\"", valdup);
list->elem = inet6dev;
lxc_list_add_tail(&netdev->ipv6, list);
move_ptr(inet6dev);
move_ptr(list);
return 0;
}
static int set_config_net_ipv6_gateway(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
clr_config_net_ipv6_gateway(key, lxc_conf, data);
if (lxc_config_value_empty(value))
return 0;
if (strequal(value, "auto")) {
netdev->ipv6_gateway = NULL;
netdev->ipv6_gateway_auto = true;
} else if (strequal(value, "dev")) {
netdev->ipv6_gateway = NULL;
netdev->ipv6_gateway_auto = false;
netdev->ipv6_gateway_dev = true;
} else {
int ret;
__do_free struct in6_addr *gw = NULL;
gw = zalloc(sizeof(*gw));
if (!gw)
return ret_errno(ENOMEM);
ret = inet_pton(AF_INET6, value, gw);
if (!ret || ret < 0)
return log_error_errno(-EINVAL, EINVAL,
"Invalid ipv6 gateway address \"%s\"", value);
netdev->ipv6_gateway = move_ptr(gw);
netdev->ipv6_gateway_auto = false;
}
return 0;
}
static int set_config_net_veth_ipv6_route(const char *key, const char *value,
struct lxc_conf *lxc_conf, void *data)
{
__do_free char *valdup = NULL;
__do_free struct lxc_inet6dev *inet6dev = NULL;
__do_free struct lxc_list *list = NULL;
int ret;
char *netmask, *slash;
struct lxc_netdev *netdev = data;
if (!netdev)
return ret_errno(EINVAL);
if (netdev->type != LXC_NET_VETH)
return syserror_set(-EINVAL, "Invalid ipv6 route \"%s\", can only be used with veth network", value);
if (lxc_config_value_empty(value))
return clr_config_net_veth_ipv6_route(key, lxc_conf, data);
inet6dev = zalloc(sizeof(*inet6dev));
if (!inet6dev)
return ret_errno(ENOMEM);
list = lxc_list_new();
if (!list)
return ret_errno(ENOMEM);
valdup = strdup(value);
if (!valdup)
return -1;
slash = strchr(valdup, '/');