/* SPDX-License-Identifier: LGPL-2.1+ */ #ifndef _GNU_SOURCE #define _GNU_SOURCE 1 #endif #define __STDC_FORMAT_MACROS #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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.h" #include "utils.h" #if HAVE_SYS_PERSONALITY_H #include #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(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(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_nic); 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(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 struct lxc_config_t config_jump_table[] = { { "lxc.arch", set_config_personality, get_config_personality, clr_config_personality, }, { "lxc.apparmor.profile", set_config_apparmor_profile, get_config_apparmor_profile, clr_config_apparmor_profile, }, { "lxc.apparmor.allow_incomplete", set_config_apparmor_allow_incomplete, get_config_apparmor_allow_incomplete, clr_config_apparmor_allow_incomplete, }, { "lxc.apparmor.allow_nesting", set_config_apparmor_allow_nesting, get_config_apparmor_allow_nesting, clr_config_apparmor_allow_nesting, }, { "lxc.apparmor.raw", set_config_apparmor_raw, get_config_apparmor_raw, clr_config_apparmor_raw, }, { "lxc.autodev.tmpfs.size", set_config_autodev_tmpfs_size, get_config_autodev_tmpfs_size, clr_config_autodev_tmpfs_size, }, { "lxc.autodev", set_config_autodev, get_config_autodev, clr_config_autodev, }, { "lxc.cap.drop", set_config_cap_drop, get_config_cap_drop, clr_config_cap_drop, }, { "lxc.cap.keep", set_config_cap_keep, get_config_cap_keep, clr_config_cap_keep, }, { "lxc.cgroup2", set_config_cgroup2_controller, get_config_cgroup2_controller, clr_config_cgroup2_controller, }, { "lxc.cgroup.dir", set_config_cgroup_dir, get_config_cgroup_dir, clr_config_cgroup_dir, }, { "lxc.cgroup.relative", set_config_cgroup_relative, get_config_cgroup_relative, clr_config_cgroup_relative, }, { "lxc.cgroup", set_config_cgroup_controller, get_config_cgroup_controller, clr_config_cgroup_controller, }, { "lxc.console.buffer.size", set_config_console_buffer_size, get_config_console_buffer_size, clr_config_console_buffer_size, }, { "lxc.console.logfile", set_config_console_logfile, get_config_console_logfile, clr_config_console_logfile, }, { "lxc.console.path", set_config_console_path, get_config_console_path, clr_config_console_path, }, { "lxc.console.rotate", set_config_console_rotate, get_config_console_rotate, clr_config_console_rotate, }, { "lxc.console.size", set_config_console_size, get_config_console_size, clr_config_console_size, }, { "lxc.environment", set_config_environment, get_config_environment, clr_config_environment, }, { "lxc.ephemeral", set_config_ephemeral, get_config_ephemeral, clr_config_ephemeral, }, { "lxc.execute.cmd", set_config_execute_cmd, get_config_execute_cmd, clr_config_execute_cmd, }, { "lxc.group", set_config_group, get_config_group, clr_config_group, }, { "lxc.hook.autodev", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.clone", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.destroy", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.mount", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.post-stop", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.pre-mount", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.pre-start", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.start", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.start-host", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.stop", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.hook.version", set_config_hooks_version, get_config_hooks_version, clr_config_hooks_version, }, { "lxc.hook", set_config_hooks, get_config_hooks, clr_config_hooks, }, { "lxc.idmap", set_config_idmaps, get_config_idmaps, clr_config_idmaps, }, { "lxc.include", set_config_includefiles, get_config_includefiles, clr_config_includefiles, }, { "lxc.init.cmd", set_config_init_cmd, get_config_init_cmd, clr_config_init_cmd, }, { "lxc.init.gid", set_config_init_gid, get_config_init_gid, clr_config_init_gid, }, { "lxc.init.uid", set_config_init_uid, get_config_init_uid, clr_config_init_uid, }, { "lxc.init.cwd", set_config_init_cwd, get_config_init_cwd, clr_config_init_cwd, }, { "lxc.log.file", set_config_log_file, get_config_log_file, clr_config_log_file, }, { "lxc.log.level", set_config_log_level, get_config_log_level, clr_config_log_level, }, { "lxc.log.syslog", set_config_log_syslog, get_config_log_syslog, clr_config_log_syslog, }, { "lxc.monitor.unshare", set_config_monitor, get_config_monitor, clr_config_monitor, }, { "lxc.monitor.signal.pdeath", set_config_monitor_signal_pdeath, get_config_monitor_signal_pdeath, clr_config_monitor_signal_pdeath, }, { "lxc.mount.auto", set_config_mount_auto, get_config_mount_auto, clr_config_mount_auto, }, { "lxc.mount.entry", set_config_mount, get_config_mount, clr_config_mount, }, { "lxc.mount.fstab", set_config_mount_fstab, get_config_mount_fstab, clr_config_mount_fstab, }, { "lxc.namespace.clone", set_config_namespace_clone, get_config_namespace_clone, clr_config_namespace_clone, }, { "lxc.namespace.keep", set_config_namespace_keep, get_config_namespace_keep, clr_config_namespace_keep, }, { "lxc.namespace.share", set_config_namespace_share, get_config_namespace_share, clr_config_namespace_share, }, { "lxc.net.flags", set_config_net_flags, get_config_net_flags, clr_config_net_flags, }, { "lxc.net.hwaddr", set_config_net_hwaddr, get_config_net_hwaddr, clr_config_net_hwaddr, }, { "lxc.net.ipv4.address", set_config_net_ipv4_address, get_config_net_ipv4_address, clr_config_net_ipv4_address, }, { "lxc.net.ipv4.gateway", set_config_net_ipv4_gateway, get_config_net_ipv4_gateway, clr_config_net_ipv4_gateway, }, { "lxc.net.ipv6.address", set_config_net_ipv6_address, get_config_net_ipv6_address, clr_config_net_ipv6_address, }, { "lxc.net.ipv6.gateway", set_config_net_ipv6_gateway, get_config_net_ipv6_gateway, clr_config_net_ipv6_gateway, }, { "lxc.net.link", set_config_net_link, get_config_net_link, clr_config_net_link, }, { "lxc.net.l2proxy", set_config_net_l2proxy, get_config_net_l2proxy, clr_config_net_l2proxy, }, { "lxc.net.macvlan.mode", set_config_net_macvlan_mode, get_config_net_macvlan_mode, clr_config_net_macvlan_mode, }, { "lxc.net.ipvlan.mode", set_config_net_ipvlan_mode, get_config_net_ipvlan_mode, clr_config_net_ipvlan_mode, }, { "lxc.net.ipvlan.isolation", set_config_net_ipvlan_isolation, get_config_net_ipvlan_isolation, clr_config_net_ipvlan_isolation, }, { "lxc.net.mtu", set_config_net_mtu, get_config_net_mtu, clr_config_net_mtu, }, { "lxc.net.name", set_config_net_name, get_config_net_name, clr_config_net_name, }, { "lxc.net.script.down", set_config_net_script_down, get_config_net_script_down, clr_config_net_script_down, }, { "lxc.net.script.up", set_config_net_script_up, get_config_net_script_up, clr_config_net_script_up, }, { "lxc.net.type", set_config_net_type, get_config_net_type, clr_config_net_type, }, { "lxc.net.vlan.id", set_config_net_vlan_id, get_config_net_vlan_id, clr_config_net_vlan_id, }, { "lxc.net.veth.mode", set_config_net_veth_mode, get_config_net_veth_mode, clr_config_net_veth_mode, }, { "lxc.net.veth.pair", set_config_net_veth_pair, get_config_net_veth_pair, clr_config_net_veth_pair, }, { "lxc.net.veth.ipv4.route", set_config_net_veth_ipv4_route, get_config_net_veth_ipv4_route, clr_config_net_veth_ipv4_route, }, { "lxc.net.veth.ipv6.route", set_config_net_veth_ipv6_route, get_config_net_veth_ipv6_route, clr_config_net_veth_ipv6_route, }, { "lxc.net.", set_config_net_nic, get_config_net_nic, clr_config_net_nic, }, { "lxc.net", set_config_net, get_config_net, clr_config_net, }, { "lxc.no_new_privs", set_config_no_new_privs, get_config_no_new_privs, clr_config_no_new_privs, }, { "lxc.prlimit", set_config_prlimit, get_config_prlimit, clr_config_prlimit, }, { "lxc.pty.max", set_config_pty_max, get_config_pty_max, clr_config_pty_max, }, { "lxc.rootfs.managed", set_config_rootfs_managed, get_config_rootfs_managed, clr_config_rootfs_managed, }, { "lxc.rootfs.mount", set_config_rootfs_mount, get_config_rootfs_mount, clr_config_rootfs_mount, }, { "lxc.rootfs.options", set_config_rootfs_options, get_config_rootfs_options, clr_config_rootfs_options, }, { "lxc.rootfs.path", set_config_rootfs_path, get_config_rootfs_path, clr_config_rootfs_path, }, { "lxc.seccomp.allow_nesting", set_config_seccomp_allow_nesting, get_config_seccomp_allow_nesting, clr_config_seccomp_allow_nesting, }, { "lxc.seccomp.notify.cookie", set_config_seccomp_notify_cookie, get_config_seccomp_notify_cookie, clr_config_seccomp_notify_cookie, }, { "lxc.seccomp.notify.proxy", set_config_seccomp_notify_proxy, get_config_seccomp_notify_proxy, clr_config_seccomp_notify_proxy, }, { "lxc.seccomp.profile", set_config_seccomp_profile, get_config_seccomp_profile, clr_config_seccomp_profile, }, { "lxc.selinux.context", set_config_selinux_context, get_config_selinux_context, clr_config_selinux_context, }, { "lxc.signal.halt", set_config_signal_halt, get_config_signal_halt, clr_config_signal_halt, }, { "lxc.signal.reboot", set_config_signal_reboot, get_config_signal_reboot, clr_config_signal_reboot, }, { "lxc.signal.stop", set_config_signal_stop, get_config_signal_stop, clr_config_signal_stop, }, { "lxc.start.auto", set_config_start, get_config_start, clr_config_start, }, { "lxc.start.delay", set_config_start, get_config_start, clr_config_start, }, { "lxc.start.order", set_config_start, get_config_start, clr_config_start, }, { "lxc.tty.dir", set_config_tty_dir, get_config_tty_dir, clr_config_tty_dir, }, { "lxc.tty.max", set_config_tty_max, get_config_tty_max, clr_config_tty_max, }, { "lxc.uts.name", set_config_uts_name, get_config_uts_name, clr_config_uts_name, }, { "lxc.sysctl", set_config_sysctl, get_config_sysctl, clr_config_sysctl, }, { "lxc.proc", set_config_proc, get_config_proc, clr_config_proc, }, }; static const size_t config_jump_table_size = sizeof(config_jump_table) / sizeof(struct lxc_config_t); struct lxc_config_t *lxc_get_config(const char *key) { size_t i; for (i = 0; i < config_jump_table_size; i++) if (!strncmp(config_jump_table[i].name, key, strlen(config_jump_table[i].name))) return &config_jump_table[i]; return NULL; } 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 (lxc_config_value_empty(value)) return clr_config_net_type(key, lxc_conf, data); if (!netdev) return -1; if (strcmp(value, "veth") == 0) { netdev->type = LXC_NET_VETH; lxc_list_init(&netdev->priv.veth_attr.ipv4_routes); lxc_list_init(&netdev->priv.veth_attr.ipv6_routes); lxc_veth_mode_to_flag(&netdev->priv.veth_attr.mode, "bridge"); } else if (strcmp(value, "macvlan") == 0) { netdev->type = LXC_NET_MACVLAN; lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode, "private"); } else if (strcmp(value, "ipvlan") == 0) { netdev->type = LXC_NET_IPVLAN; lxc_ipvlan_mode_to_flag(&netdev->priv.ipvlan_attr.mode, "l3"); lxc_ipvlan_isolation_to_flag(&netdev->priv.ipvlan_attr.isolation, "bridge"); } else if (strcmp(value, "vlan") == 0) { netdev->type = LXC_NET_VLAN; } else if (strcmp(value, "phys") == 0) { netdev->type = LXC_NET_PHYS; } else if (strcmp(value, "empty") == 0) { netdev->type = LXC_NET_EMPTY; } else if (strcmp(value, "none") == 0) { netdev->type = LXC_NET_NONE; } else { ERROR("Invalid network type %s", value); return -1; } 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 (lxc_config_value_empty(value)) return clr_config_net_flags(key, lxc_conf, data); if (!netdev) return -1; netdev->flags |= IFF_UP; return 0; } static int create_matched_ifnames(const char *value, struct lxc_conf *lxc_conf, struct lxc_netdev *netdev) { struct netns_ifaddrs *ifaddr, *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) { SYSERROR("Failed to get network interfaces"); return -1; } 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 (!strncmp(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; } } } netns_freeifaddrs(ifaddr); ifaddr = NULL; 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 (lxc_config_value_empty(value)) return clr_config_net_link(key, lxc_conf, data); if (!netdev) return -1; 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 (lxc_config_value_empty(value)) return clr_config_net_l2proxy(key, lxc_conf, data); if (!netdev) return minus_one_set_errno(EINVAL); ret = lxc_safe_uint(value, &val); if (ret < 0) return minus_one_set_errno(-ret); switch (val) { case 0: netdev->l2proxy = false; return 0; case 1: netdev->l2proxy = true; return 0; } return minus_one_set_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 (lxc_config_value_empty(value)) return clr_config_net_name(key, lxc_conf, data); if (!netdev) return -1; 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 (lxc_config_value_empty(value)) return clr_config_net_veth_mode(key, lxc_conf, data); if (!netdev) return -1; 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 (lxc_config_value_empty(value)) return clr_config_net_veth_pair(key, lxc_conf, data); if (!netdev) return -1; 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 (lxc_config_value_empty(value)) return clr_config_net_macvlan_mode(key, lxc_conf, data); if (!netdev) return -1; 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 (lxc_config_value_empty(value)) return clr_config_net_ipvlan_mode(key, lxc_conf, data); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_IPVLAN) { SYSERROR("Invalid ipvlan mode \"%s\", can only be used with ipvlan network", value); return minus_one_set_errno(EINVAL); } 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 (lxc_config_value_empty(value)) return clr_config_net_ipvlan_isolation(key, lxc_conf, data); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_IPVLAN) { SYSERROR("Invalid ipvlan isolation \"%s\", can only be used with ipvlan network", value); return minus_one_set_errno(EINVAL); } 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) { struct lxc_netdev *netdev = data; char *new_value; if (lxc_config_value_empty(value)) return clr_config_net_hwaddr(key, lxc_conf, data); if (!netdev) return -1; new_value = strdup(value); if (!new_value) return -1; rand_complete_hwaddr(new_value); if (lxc_config_value_empty(new_value)) { free(new_value); netdev->hwaddr = NULL; return 0; } netdev->hwaddr = 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 (lxc_config_value_empty(value)) return clr_config_net_vlan_id(key, lxc_conf, data); if (!netdev) return -1; ret = get_u16(&netdev->priv.vlan_attr.vid, value, 0); if (ret < 0) return -1; 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 (lxc_config_value_empty(value)) return clr_config_net_mtu(key, lxc_conf, data); if (!netdev) return -1; 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) { int ret; struct lxc_netdev *netdev = data; struct lxc_inetdev *inetdev; struct lxc_list *list; char *cursor, *slash; char *addr = NULL, *bcast = NULL, *prefix = NULL; if (lxc_config_value_empty(value)) return clr_config_net_ipv4_address(key, lxc_conf, data); if (!netdev) return -1; inetdev = malloc(sizeof(*inetdev)); if (!inetdev) return -1; memset(inetdev, 0, sizeof(*inetdev)); list = malloc(sizeof(*list)); if (!list) { free(inetdev); return -1; } lxc_list_init(list); list->elem = inetdev; addr = strdup(value); if (!addr) { free(inetdev); free(list); return -1; } 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) { SYSERROR("Invalid ipv4 address \"%s\"", value); free(inetdev); free(addr); free(list); return -1; } if (bcast) { ret = inet_pton(AF_INET, bcast, &inetdev->bcast); if (!ret || ret < 0) { SYSERROR("Invalid ipv4 broadcast address \"%s\"", value); free(inetdev); free(list); free(addr); return -1; } } /* No prefix specified, determine it from the network class. */ if (prefix) { ret = lxc_safe_uint(prefix, &inetdev->prefix); if (ret < 0) { free(inetdev); free(list); free(addr); return -1; } } else { inetdev->prefix = config_ip_prefix(&inetdev->addr); } /* If no broadcast address, let compute one from the * prefix and address. */ if (!bcast) { inetdev->bcast.s_addr = inetdev->addr.s_addr; inetdev->bcast.s_addr |= htonl(INADDR_BROADCAST >> inetdev->prefix); } lxc_list_add_tail(&netdev->ipv4, list); free(addr); 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 (lxc_config_value_empty(value)) return clr_config_net_ipv4_gateway(key, lxc_conf, data); if (!netdev) return -1; free(netdev->ipv4_gateway); if (strcmp(value, "auto") == 0) { netdev->ipv4_gateway = NULL; netdev->ipv4_gateway_auto = true; } else if (strcmp(value, "dev") == 0) { netdev->ipv4_gateway = NULL; netdev->ipv4_gateway_auto = false; netdev->ipv4_gateway_dev = true; } else { int ret; struct in_addr *gw; gw = malloc(sizeof(*gw)); if (!gw) return -1; ret = inet_pton(AF_INET, value, gw); if (!ret || ret < 0) { SYSERROR("Invalid ipv4 gateway address \"%s\"", value); free(gw); return -1; } netdev->ipv4_gateway = 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 (lxc_config_value_empty(value)) return clr_config_net_veth_ipv4_route(key, lxc_conf, data); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_VETH) { SYSERROR("Invalid ipv4 route \"%s\", can only be used with veth network", value); return minus_one_set_errno(EINVAL); } inetdev = malloc(sizeof(*inetdev)); if (!inetdev) return -1; memset(inetdev, 0, sizeof(*inetdev)); list = malloc(sizeof(*list)); if (!list) return -1; lxc_list_init(list); list->elem = inetdev; valdup = strdup(value); if (!valdup) return -1; slash = strchr(valdup, '/'); if (!slash) return minus_one_set_errno(EINVAL); *slash = '\0'; slash++; if (*slash == '\0') return minus_one_set_errno(EINVAL); netmask = slash; ret = lxc_safe_uint(netmask, &inetdev->prefix); if (ret < 0 || inetdev->prefix > 32) return minus_one_set_errno(EINVAL); ret = inet_pton(AF_INET, valdup, &inetdev->addr); if (!ret || ret < 0) return minus_one_set_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) { int ret; struct lxc_netdev *netdev = data; struct lxc_inet6dev *inet6dev; struct lxc_list *list; char *slash, *valdup, *netmask; if (lxc_config_value_empty(value)) return clr_config_net_ipv6_address(key, lxc_conf, data); if (!netdev) return -1; inet6dev = malloc(sizeof(*inet6dev)); if (!inet6dev) return -1; memset(inet6dev, 0, sizeof(*inet6dev)); list = malloc(sizeof(*list)); if (!list) { free(inet6dev); return -1; } lxc_list_init(list); list->elem = inet6dev; valdup = strdup(value); if (!valdup) { free(list); free(inet6dev); return -1; } inet6dev->prefix = 64; slash = strstr(valdup, "/"); if (slash) { *slash = '\0'; netmask = slash + 1; ret = lxc_safe_uint(netmask, &inet6dev->prefix); if (ret < 0) { free(list); free(inet6dev); free(valdup); return -1; } } ret = inet_pton(AF_INET6, valdup, &inet6dev->addr); if (!ret || ret < 0) { SYSERROR("Invalid ipv6 address \"%s\"", valdup); free(list); free(inet6dev); free(valdup); return -1; } lxc_list_add_tail(&netdev->ipv6, list); free(valdup); 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 (lxc_config_value_empty(value)) return clr_config_net_ipv6_gateway(key, lxc_conf, data); if (!netdev) return -1; free(netdev->ipv6_gateway); if (strcmp(value, "auto") == 0) { netdev->ipv6_gateway = NULL; netdev->ipv6_gateway_auto = true; } else if (strcmp(value, "dev") == 0) { netdev->ipv6_gateway = NULL; netdev->ipv6_gateway_auto = false; netdev->ipv6_gateway_dev = true; } else { int ret; struct in6_addr *gw; gw = malloc(sizeof(*gw)); if (!gw) return -1; ret = inet_pton(AF_INET6, value, gw); if (!ret || ret < 0) { SYSERROR("Invalid ipv6 gateway address \"%s\"", value); free(gw); return -1; } netdev->ipv6_gateway = 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 (lxc_config_value_empty(value)) return clr_config_net_veth_ipv6_route(key, lxc_conf, data); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_VETH) { SYSERROR("Invalid ipv6 route \"%s\", can only be used with veth network", value); return minus_one_set_errno(EINVAL); } inet6dev = malloc(sizeof(*inet6dev)); if (!inet6dev) return -1; memset(inet6dev, 0, sizeof(*inet6dev)); list = malloc(sizeof(*list)); if (!list) return -1; lxc_list_init(list); list->elem = inet6dev; valdup = strdup(value); if (!valdup) return -1; slash = strchr(valdup, '/'); if (!slash) return minus_one_set_errno(EINVAL); *slash = '\0'; slash++; if (*slash == '\0') return minus_one_set_errno(EINVAL); netmask = slash; ret = lxc_safe_uint(netmask, &inet6dev->prefix); if (ret < 0 || inet6dev->prefix > 128) return minus_one_set_errno(EINVAL); ret = inet_pton(AF_INET6, valdup, &inet6dev->addr); if (!ret || ret < 0) return minus_one_set_errno(EINVAL); lxc_list_add_tail(&netdev->priv.veth_attr.ipv6_routes, list); move_ptr(inet6dev); move_ptr(list); return 0; } static int set_config_net_script_up(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (lxc_config_value_empty(value)) return clr_config_net_script_up(key, lxc_conf, data); if (!netdev) return -1; return set_config_string_item(&netdev->upscript, value); } static int set_config_net_script_down(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (lxc_config_value_empty(value)) return clr_config_net_script_down(key, lxc_conf, data); if (!netdev) return -1; return set_config_string_item(&netdev->downscript, value); } static int add_hook(struct lxc_conf *lxc_conf, int which, char *hook) { struct lxc_list *hooklist; hooklist = malloc(sizeof(*hooklist)); if (!hooklist) { free(hook); return -1; } hooklist->elem = hook; lxc_list_add_tail(&lxc_conf->hooks[which], hooklist); return 0; } static int set_config_seccomp_allow_nesting(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { #ifdef HAVE_SECCOMP if (lxc_config_value_empty(value)) return clr_config_seccomp_allow_nesting(key, lxc_conf, NULL); if (lxc_safe_uint(value, &lxc_conf->seccomp.allow_nesting) < 0) return -1; if (lxc_conf->seccomp.allow_nesting > 1) return minus_one_set_errno(EINVAL); return 0; #else errno = ENOSYS; return -1; #endif } static int set_config_seccomp_notify_cookie(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { #ifdef HAVE_SECCOMP_NOTIFY return set_config_string_item(&lxc_conf->seccomp.notifier.cookie, value); #else return minus_one_set_errno(ENOSYS); #endif } static int set_config_seccomp_notify_proxy(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { #ifdef HAVE_SECCOMP_NOTIFY const char *offset; if (lxc_config_value_empty(value)) return clr_config_seccomp_notify_proxy(key, lxc_conf, NULL); if (strncmp(value, "unix:", 5) != 0) return minus_one_set_errno(EINVAL); offset = value + 5; if (lxc_unix_sockaddr(&lxc_conf->seccomp.notifier.proxy_addr, offset) < 0) return -1; return 0; #else return minus_one_set_errno(ENOSYS); #endif } static int set_config_seccomp_profile(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->seccomp.seccomp, value); } static int set_config_execute_cmd(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->execute_cmd, value); } static int set_config_init_cmd(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->init_cmd, value); } static int set_config_init_cwd(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->init_cwd, value); } static int set_config_init_uid(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { unsigned int init_uid; if (lxc_config_value_empty(value)) { lxc_conf->init_uid = 0; return 0; } if (lxc_safe_uint(value, &init_uid) < 0) return -1; lxc_conf->init_uid = init_uid; return 0; } static int set_config_init_gid(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { unsigned int init_gid; if (lxc_config_value_empty(value)) { lxc_conf->init_gid = 0; return 0; } if (lxc_safe_uint(value, &init_gid) < 0) return -1; lxc_conf->init_gid = init_gid; return 0; } static int set_config_hooks(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *copy; if (lxc_config_value_empty(value)) return lxc_clear_hooks(lxc_conf, key); if (strcmp(key + 4, "hook") == 0) { ERROR("lxc.hook must not have a value"); return -1; } copy = strdup(value); if (!copy) return -1; if (strcmp(key + 9, "pre-start") == 0) return add_hook(lxc_conf, LXCHOOK_PRESTART, copy); else if (strcmp(key + 9, "start-host") == 0) return add_hook(lxc_conf, LXCHOOK_START_HOST, copy); else if (strcmp(key + 9, "pre-mount") == 0) return add_hook(lxc_conf, LXCHOOK_PREMOUNT, copy); else if (strcmp(key + 9, "autodev") == 0) return add_hook(lxc_conf, LXCHOOK_AUTODEV, copy); else if (strcmp(key + 9, "mount") == 0) return add_hook(lxc_conf, LXCHOOK_MOUNT, copy); else if (strcmp(key + 9, "start") == 0) return add_hook(lxc_conf, LXCHOOK_START, copy); else if (strcmp(key + 9, "stop") == 0) return add_hook(lxc_conf, LXCHOOK_STOP, copy); else if (strcmp(key + 9, "post-stop") == 0) return add_hook(lxc_conf, LXCHOOK_POSTSTOP, copy); else if (strcmp(key + 9, "clone") == 0) return add_hook(lxc_conf, LXCHOOK_CLONE, copy); else if (strcmp(key + 9, "destroy") == 0) return add_hook(lxc_conf, LXCHOOK_DESTROY, copy); free(copy); return -1; } static int set_config_hooks_version(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; unsigned int tmp; if (lxc_config_value_empty(value)) return clr_config_hooks_version(key, lxc_conf, NULL); ret = lxc_safe_uint(value, &tmp); if (ret < 0) return -1; if (tmp > 1) { ERROR("Invalid hook version specified. Currently only 0 " "(legacy) and 1 are supported"); return -1; } lxc_conf->hooks_version = tmp; return 0; } static int set_config_personality(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { signed long personality = lxc_config_parse_arch(value); if (personality >= 0) lxc_conf->personality = personality; else WARN("Unsupported personality \"%s\"", value); return 0; } static int set_config_pty_max(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; unsigned int max = 0; if (lxc_config_value_empty(value)) { lxc_conf->pty_max = 0; return 0; } ret = lxc_safe_uint(value, &max); if (ret < 0) return -1; lxc_conf->pty_max = max; return 0; } /* We only need to check whether the first byte of the key after the lxc.start. * prefix matches our expectations since they fortunately all start with a * different letter. If anything was wrong with the key we would have already * noticed when the callback was called. */ static int set_config_start(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { bool is_empty; is_empty = lxc_config_value_empty(value); if (*(key + 10) == 'a') { /* lxc.start.auto */ if (is_empty) { lxc_conf->start_auto = 0; return 0; } if (lxc_safe_uint(value, &lxc_conf->start_auto) < 0) return -1; if (lxc_conf->start_auto > 1) return -1; return 0; } else if (*(key + 10) == 'd') { /* lxc.start.delay */ if (is_empty) { lxc_conf->start_delay = 0; return 0; } return lxc_safe_uint(value, &lxc_conf->start_delay); } else if (*(key + 10) == 'o') { /* lxc.start.order */ if (is_empty) { lxc_conf->start_order = 0; return 0; } return lxc_safe_int(value, &lxc_conf->start_order); } return -1; } static int set_config_monitor(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->monitor_unshare = 0; return 0; } if (strcmp(key + 12, "unshare") == 0) return lxc_safe_uint(value, &lxc_conf->monitor_unshare); return -1; } static int set_config_monitor_signal_pdeath(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->monitor_signal_pdeath = 0; return 0; } if (strcmp(key + 12, "signal.pdeath") == 0) { int sig_n; sig_n = sig_parse(value); if (sig_n < 0) return -1; lxc_conf->monitor_signal_pdeath = sig_n; return 0; } return -EINVAL; } static int set_config_group(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *groups, *token; struct lxc_list *grouplist; int ret = 0; if (lxc_config_value_empty(value)) return lxc_clear_groups(lxc_conf); groups = strdup(value); if (!groups) return -1; /* In case several groups are specified in a single line split these * groups in a single element for the list. */ lxc_iterate_parts(token, groups, " \t") { grouplist = malloc(sizeof(*grouplist)); if (!grouplist) { ret = -1; break; } grouplist->elem = strdup(token); if (!grouplist->elem) { free(grouplist); ret = -1; break; } lxc_list_add_tail(&lxc_conf->groups, grouplist); } free(groups); return ret; } static int set_config_environment(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { struct lxc_list *list_item = NULL; if (lxc_config_value_empty(value)) return lxc_clear_environment(lxc_conf); list_item = malloc(sizeof(*list_item)); if (!list_item) goto on_error; if (!strchr(value, '=')) { const char *env_val; const char *env_key = value; const char *env_var[3] = {0}; env_val = getenv(env_key); if (!env_val) goto on_error; env_var[0] = env_key; env_var[1] = env_val; list_item->elem = lxc_string_join("=", env_var, false); } else { list_item->elem = strdup(value); } if (!list_item->elem) goto on_error; lxc_list_add_tail(&lxc_conf->environment, list_item); return 0; on_error: free(list_item); return -1; } static int set_config_tty_max(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; unsigned int nbtty = 0; if (lxc_config_value_empty(value)) { lxc_conf->ttys.max = 0; return 0; } ret = lxc_safe_uint(value, &nbtty); if (ret < 0) return -1; lxc_conf->ttys.max = nbtty; return 0; } static int set_config_tty_dir(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_string_item_max(&lxc_conf->ttys.dir, value, NAME_MAX + 1); } static int set_config_apparmor_profile(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_string_item(&lxc_conf->lsm_aa_profile, value); } static int set_config_apparmor_allow_incomplete(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->lsm_aa_allow_incomplete = 0; return 0; } if (lxc_safe_uint(value, &lxc_conf->lsm_aa_allow_incomplete) < 0) return -1; if (lxc_conf->lsm_aa_allow_incomplete > 1) return -1; return 0; } static int set_config_apparmor_allow_nesting(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) return clr_config_apparmor_allow_nesting(key, lxc_conf, NULL); if (lxc_safe_uint(value, &lxc_conf->lsm_aa_allow_nesting) < 0) return -1; if (lxc_conf->lsm_aa_allow_nesting > 1) return -1; return 0; } static int set_config_apparmor_raw(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *elem; struct lxc_list *list; if (lxc_config_value_empty(value)) return lxc_clear_apparmor_raw(lxc_conf); list = malloc(sizeof(*list)); if (!list) { errno = ENOMEM; return -1; } elem = strdup(value); if (!elem) { free(list); return -1; } list->elem = elem; lxc_list_add_tail(&lxc_conf->lsm_aa_raw, list); return 0; } static int set_config_selinux_context(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_string_item(&lxc_conf->lsm_se_context, value); } static int set_config_log_file(const char *key, const char *value, struct lxc_conf *c, void *data) { int ret; if (lxc_config_value_empty(value)) { free(c->logfile); c->logfile = NULL; return 0; } /* Store these values in the lxc_conf, and then try to set for actual * current logging. */ ret = set_config_path_item(&c->logfile, value); if (ret == 0) ret = lxc_log_set_file(&c->logfd, c->logfile); return ret; } static int set_config_log_level(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int newlevel; if (lxc_config_value_empty(value)) { lxc_conf->loglevel = LXC_LOG_LEVEL_NOTSET; return 0; } if (value[0] >= '0' && value[0] <= '9') { if (lxc_safe_int(value, &newlevel) < 0) return -1; } else { newlevel = lxc_log_priority_to_int(value); } /* Store these values in the lxc_conf, and then try to set for actual * current logging. */ lxc_conf->loglevel = newlevel; return lxc_log_set_level(&lxc_conf->loglevel, newlevel); } static int set_config_autodev(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->autodev = 0; return 0; } if (lxc_safe_uint(value, &lxc_conf->autodev) < 0) return -1; if (lxc_conf->autodev > 1) return -1; return 0; } static int set_config_autodev_tmpfs_size(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->autodevtmpfssize = 500000; return 0; } if (lxc_safe_int(value, &lxc_conf->autodevtmpfssize) < 0) lxc_conf->autodevtmpfssize = 500000; return 0; } static int set_config_signal_halt(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int sig_n; if (lxc_config_value_empty(value)) { lxc_conf->haltsignal = 0; return 0; } sig_n = sig_parse(value); if (sig_n < 0) return -1; lxc_conf->haltsignal = sig_n; return 0; } static int set_config_signal_reboot(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int sig_n; if (lxc_config_value_empty(value)) { lxc_conf->rebootsignal = 0; return 0; } sig_n = sig_parse(value); if (sig_n < 0) return -1; lxc_conf->rebootsignal = sig_n; return 0; } static int set_config_signal_stop(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int sig_n; if (lxc_config_value_empty(value)) { lxc_conf->stopsignal = 0; return 0; } sig_n = sig_parse(value); if (sig_n < 0) return -1; lxc_conf->stopsignal = sig_n; return 0; } static int __set_config_cgroup_controller(const char *key, const char *value, struct lxc_conf *lxc_conf, int version) { const char *subkey, *token; size_t token_len; struct lxc_list *cglist = NULL; struct lxc_cgroup *cgelem = NULL; if (lxc_config_value_empty(value)) return lxc_clear_cgroups(lxc_conf, key, version); if (version == CGROUP2_SUPER_MAGIC) { token = "lxc.cgroup2."; token_len = 12; } else if (version == CGROUP_SUPER_MAGIC) { token = "lxc.cgroup."; token_len = 11; } else { return -EINVAL; } if (strncmp(key, token, token_len) != 0) return -EINVAL; subkey = key + token_len; if (*subkey == '\0') return -EINVAL; cglist = malloc(sizeof(*cglist)); if (!cglist) goto out; cgelem = malloc(sizeof(*cgelem)); if (!cgelem) goto out; memset(cgelem, 0, sizeof(*cgelem)); cgelem->subsystem = strdup(subkey); if (!cgelem->subsystem) goto out; cgelem->value = strdup(value); if (!cgelem->value) goto out; cgelem->version = version; lxc_list_add_elem(cglist, cgelem); if (version == CGROUP2_SUPER_MAGIC) lxc_list_add_tail(&lxc_conf->cgroup2, cglist); else lxc_list_add_tail(&lxc_conf->cgroup, cglist); return 0; out: free(cglist); if (cgelem) { free(cgelem->subsystem); free(cgelem->value); free(cgelem); } return -1; } static int set_config_cgroup_controller(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return __set_config_cgroup_controller(key, value, lxc_conf, CGROUP_SUPER_MAGIC); } static int set_config_cgroup2_controller(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return __set_config_cgroup_controller(key, value, lxc_conf, CGROUP2_SUPER_MAGIC); } static int set_config_cgroup_dir(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) return clr_config_cgroup_dir(key, lxc_conf, NULL); return set_config_string_item(&lxc_conf->cgroup_meta.dir, value); } static int set_config_cgroup_relative(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { unsigned int converted; int ret; if (lxc_config_value_empty(value)) return clr_config_cgroup_relative(key, lxc_conf, NULL); ret = lxc_safe_uint(value, &converted); if (ret < 0) return -ret; if (converted == 1) { lxc_conf->cgroup_meta.relative = true; return 0; } if (converted == 0) { lxc_conf->cgroup_meta.relative = false; return 0; } return -EINVAL; } static bool parse_limit_value(const char **value, rlim_t *res) { char *endptr = NULL; if (strncmp(*value, "unlimited", STRLITERALLEN("unlimited")) == 0) { *res = RLIM_INFINITY; *value += STRLITERALLEN("unlimited"); return true; } errno = 0; *res = strtoull(*value, &endptr, 10); if (errno || !endptr) return false; *value = endptr; return true; } static int set_config_prlimit(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { struct lxc_list *iter; struct rlimit limit; rlim_t limit_value; struct lxc_list *limlist = NULL; struct lxc_limit *limelem = NULL; if (lxc_config_value_empty(value)) return lxc_clear_limits(lxc_conf, key); if (strncmp(key, "lxc.prlimit.", STRLITERALLEN("lxc.prlimit.")) != 0) return -1; key += STRLITERALLEN("lxc.prlimit."); /* soft limit comes first in the value */ if (!parse_limit_value(&value, &limit_value)) return -1; limit.rlim_cur = limit_value; /* skip spaces and a colon */ while (isspace(*value)) ++value; if (*value == ':') ++value; else if (*value) /* any other character is an error here */ return -1; while (isspace(*value)) ++value; /* optional hard limit */ if (*value) { if (!parse_limit_value(&value, &limit_value)) return -1; limit.rlim_max = limit_value; /* check for trailing garbage */ while (isspace(*value)) ++value; if (*value) return -1; } else { /* a single value sets both hard and soft limit */ limit.rlim_max = limit.rlim_cur; } /* find existing list element */ lxc_list_for_each(iter, &lxc_conf->limits) { limelem = iter->elem; if (!strcmp(key, limelem->resource)) { limelem->limit = limit; return 0; } } /* allocate list element */ limlist = malloc(sizeof(*limlist)); if (!limlist) goto on_error; limelem = malloc(sizeof(*limelem)); if (!limelem) goto on_error; memset(limelem, 0, sizeof(*limelem)); limelem->resource = strdup(key); if (!limelem->resource) goto on_error; limelem->limit = limit; lxc_list_add_elem(limlist, limelem);; lxc_list_add_tail(&lxc_conf->limits, limlist); return 0; on_error: free(limlist); if (limelem) { free(limelem->resource); free(limelem); } return -1; } static int set_config_sysctl(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { struct lxc_list *iter; char *replace_value = NULL; struct lxc_list *sysctl_list = NULL; struct lxc_sysctl *sysctl_elem = NULL; if (lxc_config_value_empty(value)) return clr_config_sysctl(key, lxc_conf, NULL); if (strncmp(key, "lxc.sysctl.", STRLITERALLEN("lxc.sysctl.")) != 0) return -1; key += STRLITERALLEN("lxc.sysctl."); /* find existing list element */ lxc_list_for_each(iter, &lxc_conf->sysctls) { sysctl_elem = iter->elem; if (strcmp(key, sysctl_elem->key) != 0) continue; replace_value = strdup(value); if (!replace_value) return -1; free(sysctl_elem->value); sysctl_elem->value = replace_value; return 0; } /* allocate list element */ sysctl_list = malloc(sizeof(*sysctl_list)); if (!sysctl_list) goto on_error; sysctl_elem = malloc(sizeof(*sysctl_elem)); if (!sysctl_elem) goto on_error; memset(sysctl_elem, 0, sizeof(*sysctl_elem)); sysctl_elem->key = strdup(key); if (!sysctl_elem->key) goto on_error; sysctl_elem->value = strdup(value); if (!sysctl_elem->value) goto on_error; lxc_list_add_elem(sysctl_list, sysctl_elem); lxc_list_add_tail(&lxc_conf->sysctls, sysctl_list); return 0; on_error: free(sysctl_list); if (sysctl_elem) { free(sysctl_elem->key); free(sysctl_elem->value); free(sysctl_elem); } return -1; } static int set_config_proc(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { const char *subkey; struct lxc_list *proclist = NULL; struct lxc_proc *procelem = NULL; if (lxc_config_value_empty(value)) return clr_config_proc(key, lxc_conf, NULL); if (strncmp(key, "lxc.proc.", STRLITERALLEN("lxc.proc.")) != 0) return -1; subkey = key + STRLITERALLEN("lxc.proc."); if (*subkey == '\0') return -EINVAL; proclist = malloc(sizeof(*proclist)); if (!proclist) goto on_error; procelem = malloc(sizeof(*procelem)); if (!procelem) goto on_error; memset(procelem, 0, sizeof(*procelem)); procelem->filename = strdup(subkey); procelem->value = strdup(value); if (!procelem->filename || !procelem->value) goto on_error; proclist->elem = procelem; lxc_list_add_tail(&lxc_conf->procs, proclist); return 0; on_error: free(proclist); if (procelem) { free(procelem->filename); free(procelem->value); free(procelem); } return -1; } static int set_config_idmaps(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { unsigned long hostid, nsid, range; char type; int ret; struct lxc_list *idmaplist = NULL; struct id_map *idmap = NULL; if (lxc_config_value_empty(value)) return lxc_clear_idmaps(lxc_conf); idmaplist = malloc(sizeof(*idmaplist)); if (!idmaplist) goto on_error; idmap = malloc(sizeof(*idmap)); if (!idmap) goto on_error; memset(idmap, 0, sizeof(*idmap)); ret = parse_idmaps(value, &type, &nsid, &hostid, &range); if (ret < 0) { ERROR("Failed to parse id mappings"); goto on_error; } INFO("Read uid map: type %c nsid %lu hostid %lu range %lu", type, nsid, hostid, range); if (type == 'u') idmap->idtype = ID_TYPE_UID; else if (type == 'g') idmap->idtype = ID_TYPE_GID; else goto on_error; idmap->hostid = hostid; idmap->nsid = nsid; idmap->range = range; idmaplist->elem = idmap; lxc_list_add_tail(&lxc_conf->id_map, idmaplist); if (!lxc_conf->root_nsuid_map && idmap->idtype == ID_TYPE_UID) if (idmap->nsid == 0) lxc_conf->root_nsuid_map = idmap; if (!lxc_conf->root_nsgid_map && idmap->idtype == ID_TYPE_GID) if (idmap->nsid == 0) lxc_conf->root_nsgid_map = idmap; idmap = NULL; return 0; on_error: free(idmaplist); free(idmap); return -1; } static int set_config_mount_fstab(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { clr_config_mount_fstab(key, lxc_conf, NULL); return -1; } return set_config_path_item(&lxc_conf->fstab, value); } static int set_config_mount_auto(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *autos, *token; int i; int ret = -1; static struct { const char *token; int mask; int flag; } allowed_auto_mounts[] = { { "proc", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED }, { "proc:mixed", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED }, { "proc:rw", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_RW }, { "sys", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED }, { "sys:ro", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RO }, { "sys:mixed", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED }, { "sys:rw", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RW }, { "cgroup", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC }, { "cgroup:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED }, { "cgroup:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO }, { "cgroup:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW }, { "cgroup:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC | LXC_AUTO_CGROUP_FORCE }, { "cgroup:mixed:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED | LXC_AUTO_CGROUP_FORCE }, { "cgroup:ro:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO | LXC_AUTO_CGROUP_FORCE }, { "cgroup:rw:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW | LXC_AUTO_CGROUP_FORCE }, { "cgroup-full", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_NOSPEC }, { "cgroup-full:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_MIXED }, { "cgroup-full:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RO }, { "cgroup-full:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RW }, { "cgroup-full:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_NOSPEC | LXC_AUTO_CGROUP_FORCE }, { "cgroup-full:mixed:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_MIXED | LXC_AUTO_CGROUP_FORCE }, { "cgroup-full:ro:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RO | LXC_AUTO_CGROUP_FORCE }, { "cgroup-full:rw:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RW | LXC_AUTO_CGROUP_FORCE }, { "shmounts:", LXC_AUTO_SHMOUNTS_MASK, LXC_AUTO_SHMOUNTS }, /* For adding anything that is just a single on/off, but has no * options: keep mask and flag identical and just define the enum * value as an unused bit so far */ { NULL, 0, 0 } }; if (lxc_config_value_empty(value)) { lxc_conf->auto_mounts = 0; return 0; } autos = strdup(value); if (!autos) return -1; lxc_iterate_parts(token, autos, " \t") { bool is_shmounts = false; for (i = 0; allowed_auto_mounts[i].token; i++) { if (!strcmp(allowed_auto_mounts[i].token, token)) break; if (strcmp("shmounts:", allowed_auto_mounts[i].token) == 0 && strncmp("shmounts:", token, STRLITERALLEN("shmounts:")) == 0) { is_shmounts = true; break; } } if (!allowed_auto_mounts[i].token) { ERROR("Invalid filesystem to automount \"%s\"", token); goto on_error; } lxc_conf->auto_mounts &= ~allowed_auto_mounts[i].mask; lxc_conf->auto_mounts |= allowed_auto_mounts[i].flag; if (is_shmounts) { char *container_path; char *host_path; host_path = token + STRLITERALLEN("shmounts:"); if (*host_path == '\0') { SYSERROR("Failed to copy shmounts host path"); goto on_error; } container_path = strchr(host_path, ':'); if (!container_path || *(container_path + 1) == '\0') container_path = "/dev/.lxc-mounts"; else *container_path++ = '\0'; lxc_conf->shmount.path_host = strdup(host_path); if (!lxc_conf->shmount.path_host) { SYSERROR("Failed to copy shmounts host path"); goto on_error; } lxc_conf->shmount.path_cont = strdup(container_path); if(!lxc_conf->shmount.path_cont) { SYSERROR("Failed to copy shmounts container path"); goto on_error; } } } ret = 0; on_error: free(autos); return ret; } static int set_config_mount(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *mntelem; struct lxc_list *mntlist; if (lxc_config_value_empty(value)) return lxc_clear_mount_entries(lxc_conf); mntlist = malloc(sizeof(*mntlist)); if (!mntlist) return -1; mntelem = strdup(value); if (!mntelem) { free(mntlist); return -1; } mntlist->elem = mntelem; lxc_list_add_tail(&lxc_conf->mount_list, mntlist); return 0; } int add_elem_to_mount_list(const char *value, struct lxc_conf *lxc_conf) { return set_config_mount(NULL, value, lxc_conf, NULL); } static int set_config_cap_keep(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *keepcaps, *token; struct lxc_list *keeplist; int ret = -1; if (lxc_config_value_empty(value)) return lxc_clear_config_keepcaps(lxc_conf); keepcaps = strdup(value); if (!keepcaps) return -1; /* In case several capability keep is specified in a single line * split these caps in a single element for the list. */ lxc_iterate_parts(token, keepcaps, " \t") { if (!strcmp(token, "none")) lxc_clear_config_keepcaps(lxc_conf); keeplist = malloc(sizeof(*keeplist)); if (!keeplist) goto on_error; keeplist->elem = strdup(token); if (!keeplist->elem) { free(keeplist); goto on_error; } lxc_list_add_tail(&lxc_conf->keepcaps, keeplist); } ret = 0; on_error: free(keepcaps); return ret; } static int set_config_cap_drop(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *dropcaps, *token; struct lxc_list *droplist; int ret = -1; if (lxc_config_value_empty(value)) return lxc_clear_config_caps(lxc_conf); dropcaps = strdup(value); if (!dropcaps) return -1; /* In case several capability drop is specified in a single line * split these caps in a single element for the list. */ lxc_iterate_parts(token, dropcaps, " \t") { droplist = malloc(sizeof(*droplist)); if (!droplist) goto on_error; droplist->elem = strdup(token); if (!droplist->elem) { free(droplist); goto on_error; } lxc_list_add_tail(&lxc_conf->caps, droplist); } ret = 0; on_error: free(dropcaps); return ret; } static int set_config_console_path(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->console.path, value); } static int set_config_console_rotate(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->console.log_rotate = 0; return 0; } if (lxc_safe_uint(value, &lxc_conf->console.log_rotate) < 0) return -1; if (lxc_conf->console.log_rotate > 1) { ERROR("The \"lxc.console.rotate\" config key can only be set " "to 0 or 1"); return -1; } return 0; } static int set_config_console_logfile(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->console.log_path, value); } static int set_config_console_buffer_size(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; int64_t size; uint64_t buffer_size, pgsz; if (lxc_config_value_empty(value)) { lxc_conf->console.buffer_size = 0; return 0; } /* If the user specified "auto" the default log size is 2^17 = 128 Kib */ if (!strcmp(value, "auto")) { lxc_conf->console.buffer_size = 1 << 17; return 0; } ret = parse_byte_size_string(value, &size); if (ret < 0) return -1; if (size < 0) return -EINVAL; /* must be at least a page size */ pgsz = lxc_getpagesize(); if ((uint64_t)size < pgsz) { NOTICE("Requested ringbuffer size for the console is %" PRId64 " but must be at least %" PRId64 " bytes. Setting ringbuffer size to %" PRId64 " bytes", size, pgsz, pgsz); size = pgsz; } buffer_size = lxc_find_next_power2((uint64_t)size); if (buffer_size == 0) return -EINVAL; if (buffer_size != size) NOTICE("Passed size was not a power of 2. Rounding log size to " "next power of two: %" PRIu64 " bytes", buffer_size); lxc_conf->console.buffer_size = buffer_size; return 0; } static int set_config_console_size(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; int64_t size; uint64_t log_size, pgsz; if (lxc_config_value_empty(value)) { lxc_conf->console.log_size = 0; return 0; } /* If the user specified "auto" the default log size is 2^17 = 128 Kib */ if (!strcmp(value, "auto")) { lxc_conf->console.log_size = 1 << 17; return 0; } ret = parse_byte_size_string(value, &size); if (ret < 0) return -1; if (size < 0) return -EINVAL; /* must be at least a page size */ pgsz = lxc_getpagesize(); if ((uint64_t)size < pgsz) { NOTICE("Requested ringbuffer size for the console is %" PRId64 " but must be at least %" PRId64 " bytes. Setting ringbuffer size to %" PRId64 " bytes", size, pgsz, pgsz); size = pgsz; } log_size = lxc_find_next_power2((uint64_t)size); if (log_size == 0) return -EINVAL; if (log_size != size) NOTICE("Passed size was not a power of 2. Rounding log size to " "next power of two: %" PRIu64 " bytes", log_size); lxc_conf->console.log_size = log_size; return 0; } /* * If we find a lxc.net.[i].hwaddr or lxc.network.hwaddr in the original config * file, we expand it in the unexpanded_config, so that after a save_config we * store the hwaddr for re-use. * This is only called when reading the config file, not when executing a * lxc.include. * 'x' and 'X' are substituted in-place. */ static void update_hwaddr(const char *line) { char *p; line += lxc_char_left_gc(line, strlen(line)); if (line[0] == '#') return; if (!lxc_config_net_is_hwaddr(line)) return; /* Let config_net_hwaddr raise the error. */ p = strchr(line, '='); if (!p) return; p++; while (isblank(*p)) p++; if (!*p) return; rand_complete_hwaddr(p); } int append_unexp_config_line(const char *line, struct lxc_conf *conf) { size_t linelen; size_t len = conf->unexpanded_len; update_hwaddr(line); linelen = strlen(line); while (conf->unexpanded_alloced <= len + linelen + 2) { char *tmp = realloc(conf->unexpanded_config, conf->unexpanded_alloced + 1024); if (!tmp) return -1; if (!conf->unexpanded_config) *tmp = '\0'; conf->unexpanded_config = tmp; conf->unexpanded_alloced += 1024; } memcpy(conf->unexpanded_config + conf->unexpanded_len, line, linelen); conf->unexpanded_len += linelen; if (line[linelen - 1] != '\n') conf->unexpanded_config[conf->unexpanded_len++] = '\n'; conf->unexpanded_config[conf->unexpanded_len] = '\0'; return 0; } static int do_includedir(const char *dirp, struct lxc_conf *lxc_conf) { struct dirent *direntp; DIR *dir; char path[PATH_MAX]; int len; int ret = -1; dir = opendir(dirp); if (!dir) return -1; while ((direntp = readdir(dir))) { const char *fnam; fnam = direntp->d_name; if (!strcmp(fnam, ".")) continue; if (!strcmp(fnam, "..")) continue; len = strlen(fnam); if (len < 6 || strncmp(fnam + len - 5, ".conf", 5) != 0) continue; len = snprintf(path, PATH_MAX, "%s/%s", dirp, fnam); if (len < 0 || len >= PATH_MAX) { ret = -1; goto out; } ret = lxc_config_read(path, lxc_conf, true); if (ret < 0) goto out; } ret = 0; out: closedir(dir); return ret; } static int set_config_includefiles(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { clr_config_includefiles(key, lxc_conf, NULL); return 0; } if (is_dir(value)) return do_includedir(value, lxc_conf); return lxc_config_read(value, lxc_conf, true); } static int set_config_rootfs_path(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; char *dup, *tmp; const char *container_path; if (lxc_config_value_empty(value)) { free(lxc_conf->rootfs.path); lxc_conf->rootfs.path = NULL; return 0; } dup = strdup(value); if (!dup) return -1; /* Split : into and * . Set "rootfs.bdev_type" to and * "rootfs.path" to . */ tmp = strchr(dup, ':'); if (tmp) { *tmp = '\0'; ret = set_config_path_item(&lxc_conf->rootfs.bdev_type, dup); if (ret < 0) { free(dup); return -1; } tmp++; container_path = tmp; } else { container_path = value; } ret = set_config_path_item(&lxc_conf->rootfs.path, container_path); free(dup); return ret; } static int set_config_rootfs_managed(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { unsigned int val = 0; if (lxc_config_value_empty(value)) { lxc_conf->rootfs.managed = true; return 0; } if (lxc_safe_uint(value, &val) < 0) return -EINVAL; switch (val) { case 0: lxc_conf->rootfs.managed = false; return 0; case 1: lxc_conf->rootfs.managed = true; return 0; } return -EINVAL; } static int set_config_rootfs_mount(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { return set_config_path_item(&lxc_conf->rootfs.mount, value); } static int set_config_rootfs_options(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; unsigned long mflags = 0, pflags = 0; char *mdata = NULL, *opts = NULL; struct lxc_rootfs *rootfs = &lxc_conf->rootfs; ret = parse_mntopts(value, &mflags, &mdata); if (ret < 0) return -EINVAL; ret = parse_propagationopts(value, &pflags); if (ret < 0) { free(mdata); return -EINVAL; } ret = set_config_string_item(&opts, value); if (ret < 0) { free(mdata); return -ENOMEM; } rootfs->mountflags = mflags | pflags; rootfs->options = opts; rootfs->data = mdata; return 0; } static int set_config_uts_name(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { struct utsname *utsname; if (lxc_config_value_empty(value)) { clr_config_uts_name(key, lxc_conf, NULL); return 0; } utsname = malloc(sizeof(*utsname)); if (!utsname) return -1; if (strlen(value) >= sizeof(utsname->nodename)) { free(utsname); return -1; } (void)strlcpy(utsname->nodename, value, sizeof(utsname->nodename)); free(lxc_conf->utsname); lxc_conf->utsname = utsname; return 0; } static int set_config_namespace_clone(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *ns, *token; int cloneflag = 0; if (lxc_config_value_empty(value)) return clr_config_namespace_clone(key, lxc_conf, data); if (lxc_conf->ns_keep != 0) { errno = EINVAL; SYSERROR("Cannot set both \"lxc.namespace.clone\" and " "\"lxc.namespace.keep\""); return -EINVAL; } ns = strdup(value); if (!ns) return -1; lxc_iterate_parts(token, ns, " \t") { token += lxc_char_left_gc(token, strlen(token)); token[lxc_char_right_gc(token, strlen(token))] = '\0'; cloneflag = lxc_namespace_2_cloneflag(token); if (cloneflag < 0) { free(ns); return -EINVAL; } lxc_conf->ns_clone |= cloneflag; } free(ns); return 0; } static int set_config_namespace_keep(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { char *ns, *token; int cloneflag = 0; if (lxc_config_value_empty(value)) return clr_config_namespace_keep(key, lxc_conf, data); if (lxc_conf->ns_clone != 0) { errno = EINVAL; SYSERROR("Cannot set both \"lxc.namespace.clone\" and " "\"lxc.namespace.keep\""); return -EINVAL; } ns = strdup(value); if (!ns) return -1; lxc_iterate_parts(token, ns, " \t") { token += lxc_char_left_gc(token, strlen(token)); token[lxc_char_right_gc(token, strlen(token))] = '\0'; cloneflag = lxc_namespace_2_cloneflag(token); if (cloneflag < 0) { free(ns); return -EINVAL; } lxc_conf->ns_keep |= cloneflag; } free(ns); return 0; } static int set_config_namespace_share(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ns_idx; const char *namespace; if (lxc_config_value_empty(value)) return clr_config_namespace_share(key, lxc_conf, data); namespace = key + STRLITERALLEN("lxc.namespace.share."); ns_idx = lxc_namespace_2_ns_idx(namespace); if (ns_idx < 0) return ns_idx; return set_config_string_item(&lxc_conf->ns_share[ns_idx], value); } struct parse_line_conf { struct lxc_conf *conf; bool from_include; }; static int parse_line(char *buffer, void *data) { char *dot, *key, *line, *linep, *value; bool empty_line; struct lxc_config_t *config; int ret = 0; char *dup = buffer; struct parse_line_conf *plc = data; /* If there are newlines in the config file we should keep them. */ empty_line = lxc_is_line_empty(dup); if (empty_line) dup = "\n"; /* We have to dup the buffer otherwise, at the re-exec for reboot we * modified the original string on the stack by replacing '=' by '\0' * below. */ linep = line = strdup(dup); if (!line) return -1; if (!plc->from_include) { ret = append_unexp_config_line(line, plc->conf); if (ret < 0) goto on_error; } if (empty_line) goto on_error; line += lxc_char_left_gc(line, strlen(line)); /* ignore comments */ if (line[0] == '#') goto on_error; /* martian option - don't add it to the config itself */ if (strncmp(line, "lxc.", 4)) goto on_error; ret = -1; dot = strchr(line, '='); if (!dot) { ERROR("Invalid configuration line: %s", line); goto on_error; } *dot = '\0'; value = dot + 1; key = line; key[lxc_char_right_gc(key, strlen(key))] = '\0'; value += lxc_char_left_gc(value, strlen(value)); value[lxc_char_right_gc(value, strlen(value))] = '\0'; if (*value == '\'' || *value == '\"') { size_t len; len = strlen(value); if (len > 1 && value[len - 1] == *value) { value[len - 1] = '\0'; value++; } } config = lxc_get_config(key); if (!config) { ERROR("Unknown configuration key \"%s\"", key); goto on_error; } ret = config->set(key, value, plc->conf, NULL); on_error: free(linep); return ret; } static struct new_config_item *parse_new_conf_line(char *buffer) { char *dot, *key, *line, *linep, *value; int ret = 0; char *dup = buffer; struct new_config_item *new = NULL; linep = line = strdup(dup); if (!line) return NULL; line += lxc_char_left_gc(line, strlen(line)); /* martian option - don't add it to the config itself */ if (strncmp(line, "lxc.", 4)) goto on_error; ret = -1; dot = strchr(line, '='); if (!dot) { ERROR("Invalid configuration item: %s", line); goto on_error; } *dot = '\0'; value = dot + 1; key = line; key[lxc_char_right_gc(key, strlen(key))] = '\0'; value += lxc_char_left_gc(value, strlen(value)); value[lxc_char_right_gc(value, strlen(value))] = '\0'; if (*value == '\'' || *value == '\"') { size_t len; len = strlen(value); if (len > 1 && value[len - 1] == *value) { value[len - 1] = '\0'; value++; } } ret = -1; new = malloc(sizeof(struct new_config_item)); if (!new) goto on_error; new->key = strdup(key); new->val = strdup(value); if (!new->val || !new->key) goto on_error; ret = 0; on_error: free(linep); if (ret < 0 && new) { free(new->key); free(new->val); free(new); new = NULL; } return new; } int lxc_config_read(const char *file, struct lxc_conf *conf, bool from_include) { struct parse_line_conf c; c.conf = conf; c.from_include = from_include; /* Catch only the top level config file name in the structure. */ if (!conf->rcfile) conf->rcfile = strdup(file); return lxc_file_for_each_line_mmap(file, parse_line, &c); } int lxc_config_define_add(struct lxc_list *defines, char *arg) { struct lxc_list *dent; dent = malloc(sizeof(struct lxc_list)); if (!dent) return -1; dent->elem = parse_new_conf_line(arg); if (!dent->elem) { free(dent); return -1; } lxc_list_add_tail(defines, dent); return 0; } bool lxc_config_define_load(struct lxc_list *defines, struct lxc_container *c) { struct lxc_list *it; bool bret = true; lxc_list_for_each(it, defines) { struct new_config_item *new_item = it->elem; bret = c->set_config_item(c, new_item->key, new_item->val); if (!bret) break; } lxc_config_define_free(defines); return bret; } void lxc_config_define_free(struct lxc_list *defines) { struct lxc_list *it, *next; lxc_list_for_each_safe(it, defines, next) { struct new_config_item *new_item = it->elem; free(new_item->key); free(new_item->val); lxc_list_del(it); free(it); } } signed long lxc_config_parse_arch(const char *arch) { #if HAVE_SYS_PERSONALITY_H size_t i; struct per_name { char *name; unsigned long per; } pername[] = { { "arm", PER_LINUX32 }, { "armel", PER_LINUX32 }, { "armhf", PER_LINUX32 }, { "armv7l", PER_LINUX32 }, { "athlon", PER_LINUX32 }, { "i386", PER_LINUX32 }, { "i486", PER_LINUX32 }, { "i586", PER_LINUX32 }, { "i686", PER_LINUX32 }, { "linux32", PER_LINUX32 }, { "mips", PER_LINUX32 }, { "mipsel", PER_LINUX32 }, { "ppc", PER_LINUX32 }, { "powerpc", PER_LINUX32 }, { "x86", PER_LINUX32 }, { "amd64", PER_LINUX }, { "arm64", PER_LINUX }, { "linux64", PER_LINUX }, { "mips64", PER_LINUX }, { "mips64el", PER_LINUX }, { "ppc64", PER_LINUX }, { "ppc64el", PER_LINUX }, { "ppc64le", PER_LINUX }, { "powerpc64", PER_LINUX }, { "s390x", PER_LINUX }, { "x86_64", PER_LINUX }, }; size_t len = sizeof(pername) / sizeof(pername[0]); for (i = 0; i < len; i++) if (!strcmp(pername[i].name, arch)) return pername[i].per; #endif return -1; } int lxc_fill_elevated_privileges(char *flaglist, int *flags) { char *token; int i, aflag; struct { const char *token; int flag; } all_privs[] = { { "CGROUP", LXC_ATTACH_MOVE_TO_CGROUP }, { "CAP", LXC_ATTACH_DROP_CAPABILITIES }, { "LSM", LXC_ATTACH_LSM_EXEC }, { NULL, 0 } }; if (!flaglist) { /* For the sake of backward compatibility, drop all privileges * if none is specified. */ for (i = 0; all_privs[i].token; i++) *flags |= all_privs[i].flag; return 0; } lxc_iterate_parts(token, flaglist, "|") { aflag = -1; for (i = 0; all_privs[i].token; i++) if (!strcmp(all_privs[i].token, token)) aflag = all_privs[i].flag; if (aflag < 0) return -1; *flags |= aflag; } return 0; } /* Write out a configuration file. */ int write_config(int fd, const struct lxc_conf *conf) { int ret; size_t len = conf->unexpanded_len; if (len == 0) return 0; ret = lxc_write_nointr(fd, conf->unexpanded_config, len); if (ret < 0) { SYSERROR("Failed to write configuration file"); return -1; } return 0; } bool do_append_unexp_config_line(struct lxc_conf *conf, const char *key, const char *v) { __do_free char *tmp = NULL; int ret; size_t len; len = strlen(key) + strlen(v) + 4; tmp = must_realloc(NULL, len); if (lxc_config_value_empty(v)) ret = snprintf(tmp, len, "%s =", key); else ret = snprintf(tmp, len, "%s = %s", key, v); if (ret < 0 || ret >= len) return false; /* Save the line verbatim into unexpanded_conf */ if (append_unexp_config_line(tmp, conf)) return false; return true; } void clear_unexp_config_line(struct lxc_conf *conf, const char *key, bool rm_subkeys) { char *lend; char *lstart = conf->unexpanded_config; if (!conf->unexpanded_config) return; while (*lstart) { lend = strchr(lstart, '\n'); char v; if (!lend) lend = lstart + strlen(lstart); else lend++; if (strncmp(lstart, key, strlen(key)) != 0) { lstart = lend; continue; } if (!rm_subkeys) { v = lstart[strlen(key)]; if (!isspace(v) && v != '=') { lstart = lend; continue; } } conf->unexpanded_len -= (lend - lstart); if (*lend == '\0') { *lstart = '\0'; return; } memmove(lstart, lend, strlen(lend) + 1); } } bool clone_update_unexp_ovl_paths(struct lxc_conf *conf, const char *oldpath, const char *newpath, const char *oldname, const char *newname, const char *ovldir) { __do_free char *newdir = NULL, *olddir = NULL; int ret; char *lend, *p, *q; size_t newdirlen, olddirlen; char *lstart = conf->unexpanded_config; const char *key = "lxc.mount.entry"; olddirlen = strlen(ovldir) + strlen(oldpath) + strlen(oldname) + 2; olddir = must_realloc(NULL, olddirlen + 1); ret = snprintf(olddir, olddirlen + 1, "%s=%s/%s", ovldir, oldpath, oldname); if (ret < 0 || ret >= olddirlen + 1) return false; newdirlen = strlen(ovldir) + strlen(newpath) + strlen(newname) + 2; newdir = must_realloc(NULL, newdirlen + 1); ret = snprintf(newdir, newdirlen + 1, "%s=%s/%s", ovldir, newpath, newname); if (ret < 0 || ret >= newdirlen + 1) return false; if (!conf->unexpanded_config) return true; while (*lstart) { lend = strchr(lstart, '\n'); if (!lend) lend = lstart + strlen(lstart); else lend++; if (strncmp(lstart, key, strlen(key)) != 0) goto next; p = strchr(lstart + strlen(key), '='); if (!p) goto next; p++; while (isblank(*p)) p++; if (p >= lend) goto next; /* Whenever a lxc.mount.entry entry is found in a line we check * if the substring "overlay" is present before doing any * further work. We check for "overlay" because substrings need * to have at least one space before them in a valid overlay * lxc.mount.entry (/A B overlay). When the space before is * missing it is very likely that these substrings are part of a * path or something else. (Checking q >= lend ensures that we * only count matches in the current line.) */ q = strstr(p, " overlay"); if (!q || q >= lend) goto next; if (!(q = strstr(p, olddir)) || (q >= lend)) goto next; /* replace the olddir with newdir */ if (olddirlen >= newdirlen) { size_t diff = olddirlen - newdirlen; memcpy(q, newdir, newdirlen); if (olddirlen != newdirlen) { memmove(q + newdirlen, q + newdirlen + diff, strlen(q) - newdirlen - diff + 1); lend -= diff; conf->unexpanded_len -= diff; } } else { char *new; size_t diff = newdirlen - olddirlen; size_t oldlen = conf->unexpanded_len; size_t newlen = oldlen + diff; size_t poffset = q - conf->unexpanded_config; new = realloc(conf->unexpanded_config, newlen + 1); if (!new) return false; conf->unexpanded_len = newlen; conf->unexpanded_alloced = newlen + 1; new[newlen - 1] = '\0'; lend = new + (lend - conf->unexpanded_config); /* Move over the remainder to make room for the newdir. */ memmove(new + poffset + newdirlen, new + poffset + olddirlen, oldlen - poffset - olddirlen + 1); conf->unexpanded_config = new; memcpy(new + poffset, newdir, newdirlen); lend += diff; } next: lstart = lend; } return true; } bool clone_update_unexp_hooks(struct lxc_conf *conf, const char *oldpath, const char *newpath, const char *oldname, const char *newname) { __do_free char *newdir = NULL, *olddir = NULL; int ret; char *lend, *p; char *lstart = conf->unexpanded_config; size_t newdirlen, olddirlen; const char *key = "lxc.hook"; olddirlen = strlen(oldpath) + strlen(oldname) + 1; olddir = must_realloc(NULL, olddirlen + 1); ret = snprintf(olddir, olddirlen + 1, "%s/%s", oldpath, oldname); if (ret < 0 || ret >= olddirlen + 1) return false; newdirlen = strlen(newpath) + strlen(newname) + 1; newdir = must_realloc(NULL, newdirlen + 1); ret = snprintf(newdir, newdirlen + 1, "%s/%s", newpath, newname); if (ret < 0 || ret >= newdirlen + 1) return false; if (!conf->unexpanded_config) return true; while (*lstart) { lend = strchr(lstart, '\n'); if (!lend) lend = lstart + strlen(lstart); else lend++; if (strncmp(lstart, key, strlen(key)) != 0) goto next; p = strchr(lstart + strlen(key), '='); if (!p) goto next; p++; while (isblank(*p)) p++; if (p >= lend) goto next; if (strncmp(p, olddir, strlen(olddir)) != 0) goto next; /* replace the olddir with newdir */ if (olddirlen >= newdirlen) { size_t diff = olddirlen - newdirlen; memcpy(p, newdir, newdirlen); if (olddirlen != newdirlen) { memmove(p + newdirlen, p + newdirlen + diff, strlen(p) - newdirlen - diff + 1); lend -= diff; conf->unexpanded_len -= diff; } } else { char *new; size_t diff = newdirlen - olddirlen; size_t oldlen = conf->unexpanded_len; size_t newlen = oldlen + diff; size_t poffset = p - conf->unexpanded_config; new = realloc(conf->unexpanded_config, newlen + 1); if (!new) return false; conf->unexpanded_len = newlen; conf->unexpanded_alloced = newlen + 1; new[newlen - 1] = '\0'; lend = new + (lend - conf->unexpanded_config); /* Move over the remainder to make room for the newdir. */ memmove(new + poffset + newdirlen, new + poffset + olddirlen, oldlen - poffset - olddirlen + 1); conf->unexpanded_config = new; memcpy(new + poffset, newdir, newdirlen); lend += diff; } next: lstart = lend; } return true; } #define DO(cmd) \ { \ if (!(cmd)) { \ ERROR("Error writing to new config"); \ return false; \ } \ } /* This is called only from clone. We wish to update all hwaddrs in the * unexpanded config file. We can't/don't want to update any which come from * lxc.includes (there shouldn't be any). * We can't just walk the c->lxc-conf->network list because that includes netifs * from the include files. So we update the ones which we find in the unexp * config file, then find the original macaddr in the conf->network, and update * that to the same value. */ bool network_new_hwaddrs(struct lxc_conf *conf) { char *lend, *p, *p2; struct lxc_list *it; char *lstart = conf->unexpanded_config; if (!conf->unexpanded_config) return true; while (*lstart) { char newhwaddr[18], oldhwaddr[17]; lend = strchr(lstart, '\n'); if (!lend) lend = lstart + strlen(lstart); else lend++; if (!lxc_config_net_is_hwaddr(lstart)) { lstart = lend; continue; } p = strchr(lstart, '='); if (!p) { lstart = lend; continue; } p++; while (isblank(*p)) p++; if (!*p) return true; p2 = p; while (*p2 && !isblank(*p2) && *p2 != '\n') p2++; if ((p2 - p) != 17) { WARN("Bad hwaddr entry"); lstart = lend; continue; } memcpy(oldhwaddr, p, 17); if (!new_hwaddr(newhwaddr)) return false; memcpy(p, newhwaddr, 17); lxc_list_for_each(it, &conf->network) { struct lxc_netdev *n = it->elem; if (n->hwaddr && memcmp(oldhwaddr, n->hwaddr, 17) == 0) memcpy(n->hwaddr, newhwaddr, 17); } lstart = lend; } return true; } static int set_config_ephemeral(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { if (lxc_config_value_empty(value)) { lxc_conf->ephemeral = 0; return 0; } if (lxc_safe_uint(value, &lxc_conf->ephemeral) < 0) return -1; if (lxc_conf->ephemeral > 1) return -1; return 0; } static int set_config_log_syslog(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int facility; if (lxc_conf->syslog) { free(lxc_conf->syslog); lxc_conf->syslog = NULL; } if (lxc_config_value_empty(value)) return 0; facility = lxc_syslog_priority_to_int(value); if (facility == -EINVAL) return -1; lxc_log_syslog(facility); return set_config_string_item(&lxc_conf->syslog, value); } static int set_config_no_new_privs(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { unsigned int v; if (lxc_config_value_empty(value)) { lxc_conf->no_new_privs = false; return 0; } if (lxc_safe_uint(value, &v) < 0) return -1; if (v > 1) return -1; lxc_conf->no_new_privs = v ? true : false; return 0; } /* Callbacks to get configuration items. */ static int get_config_personality(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); #if HAVE_SYS_PERSONALITY_H int len = 0; switch (c->personality) { case PER_LINUX32: strprint(retv, inlen, "i686"); break; case PER_LINUX: strprint(retv, inlen, "x86_64"); break; default: break; } #endif return fulllen; } static int get_config_pty_max(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_size_t(c, retv, inlen, c->pty_max); } static int get_config_tty_max(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_size_t(c, retv, inlen, c->ttys.max); } static int get_config_tty_dir(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->ttys.dir); } static int get_config_apparmor_profile(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->lsm_aa_profile); } static int get_config_apparmor_allow_incomplete(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->lsm_aa_allow_incomplete); } static int get_config_apparmor_allow_nesting(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->lsm_aa_allow_nesting); } static int get_config_apparmor_raw(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; struct lxc_list *it; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->lsm_aa_raw) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_selinux_context(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->lsm_se_context); } /* If you ask for a specific cgroup value, i.e. lxc.cgroup.devices.list, then * just the value(s) will be printed. Since there still could be more than one, * it is newline-separated. * (Maybe that's ambiguous, since some values, i.e. devices.list, will already * have newlines?) * If you ask for 'lxc.cgroup", then all cgroup entries will be printed, in * 'lxc.cgroup.subsystem.key = value' format. */ static int __get_config_cgroup_controller(const char *key, char *retv, int inlen, struct lxc_conf *c, int version) { int len; size_t namespaced_token_len; char *global_token, *namespaced_token; struct lxc_list *it; int fulllen = 0; bool get_all = false; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (version == CGROUP2_SUPER_MAGIC) { global_token = "lxc.cgroup2"; namespaced_token = "lxc.cgroup2."; namespaced_token_len = STRLITERALLEN("lxc.cgroup2."); } else if (version == CGROUP_SUPER_MAGIC) { global_token = "lxc.cgroup"; namespaced_token = "lxc.cgroup."; namespaced_token_len = STRLITERALLEN("lxc.cgroup."); } else { return -1; } if (strcmp(key, global_token) == 0) get_all = true; else if (strncmp(key, namespaced_token, namespaced_token_len) == 0) key += namespaced_token_len; else return -1; lxc_list_for_each(it, &c->cgroup) { struct lxc_cgroup *cg = it->elem; if (get_all) { if (version != cg->version) continue; strprint(retv, inlen, "%s.%s = %s\n", global_token, cg->subsystem, cg->value); } else if (strcmp(cg->subsystem, key) == 0) { strprint(retv, inlen, "%s\n", cg->value); } } return fulllen; } static int get_config_cgroup_controller(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return __get_config_cgroup_controller(key, retv, inlen, c, CGROUP_SUPER_MAGIC); } static int get_config_cgroup2_controller(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return __get_config_cgroup_controller(key, retv, inlen, c, CGROUP2_SUPER_MAGIC); } static int get_config_cgroup_dir(const char *key, char *retv, int inlen, struct lxc_conf *lxc_conf, void *data) { int len; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); strprint(retv, inlen, "%s", lxc_conf->cgroup_meta.dir); return fulllen; } static inline int get_config_cgroup_relative(const char *key, char *retv, int inlen, struct lxc_conf *lxc_conf, void *data) { return lxc_get_conf_int(lxc_conf, retv, inlen, lxc_conf->cgroup_meta.relative); } static int get_config_idmaps(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { struct lxc_list *it; int len, listlen, ret; int fulllen = 0; /* "u 1000 1000000 65536" * * let's render this as * * sizeof(char) * + * sizeof(" ") * + * sizeof(uint32_t) * + * sizeof(" ") * + * sizeof(uint32_t) * + * sizeof(" ") * + * sizeof(uint32_t) * + * \0 */ #define __LXC_IDMAP_STR_BUF (3 * INTTYPE_TO_STRLEN(uint32_t) + 3 + 1 + 1) char buf[__LXC_IDMAP_STR_BUF]; if (!retv) inlen = 0; else memset(retv, 0, inlen); listlen = lxc_list_len(&c->id_map); lxc_list_for_each(it, &c->id_map) { struct id_map *map = it->elem; ret = snprintf(buf, __LXC_IDMAP_STR_BUF, "%c %lu %lu %lu", (map->idtype == ID_TYPE_UID) ? 'u' : 'g', map->nsid, map->hostid, map->range); if (ret < 0 || ret >= __LXC_IDMAP_STR_BUF) return -1; strprint(retv, inlen, "%s%s", buf, (listlen-- > 1) ? "\n" : ""); } return fulllen; } static int get_config_log_level(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { const char *v; v = lxc_log_priority_to_string(c->loglevel); return lxc_get_conf_str(retv, inlen, v); } static int get_config_log_file(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->logfile); } static int get_config_mount_fstab(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->fstab); } static int get_config_mount_auto(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; const char *sep = ""; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!(c->auto_mounts & LXC_AUTO_ALL_MASK)) return 0; switch (c->auto_mounts & LXC_AUTO_PROC_MASK) { case LXC_AUTO_PROC_MIXED: strprint(retv, inlen, "%sproc:mixed", sep); sep = " "; break; case LXC_AUTO_PROC_RW: strprint(retv, inlen, "%sproc:rw", sep); sep = " "; break; default: break; } switch (c->auto_mounts & LXC_AUTO_SYS_MASK) { case LXC_AUTO_SYS_RO: strprint(retv, inlen, "%ssys:ro", sep); sep = " "; break; case LXC_AUTO_SYS_RW: strprint(retv, inlen, "%ssys:rw", sep); sep = " "; break; case LXC_AUTO_SYS_MIXED: strprint(retv, inlen, "%ssys:mixed", sep); sep = " "; break; default: break; } switch (c->auto_mounts & LXC_AUTO_CGROUP_MASK) { case LXC_AUTO_CGROUP_NOSPEC: strprint(retv, inlen, "%scgroup", sep); break; case LXC_AUTO_CGROUP_MIXED: strprint(retv, inlen, "%scgroup:mixed", sep); break; case LXC_AUTO_CGROUP_RO: strprint(retv, inlen, "%scgroup:ro", sep); break; case LXC_AUTO_CGROUP_RW: strprint(retv, inlen, "%scgroup:rw", sep); break; case LXC_AUTO_CGROUP_FULL_NOSPEC: strprint(retv, inlen, "%scgroup-full", sep); break; case LXC_AUTO_CGROUP_FULL_MIXED: strprint(retv, inlen, "%scgroup-full:mixed", sep); break; case LXC_AUTO_CGROUP_FULL_RO: strprint(retv, inlen, "%scgroup-full:ro", sep); break; case LXC_AUTO_CGROUP_FULL_RW: strprint(retv, inlen, "%scgroup-full:rw", sep); break; default: break; } return fulllen; } static int get_config_mount(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->mount_list) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_rootfs_path(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->rootfs.path); } static int get_config_rootfs_managed(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_bool(c, retv, inlen, c->rootfs.managed); } static int get_config_rootfs_mount(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->rootfs.mount); } static int get_config_rootfs_options(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->rootfs.options); } static int get_config_uts_name(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str( retv, inlen, c->utsname ? c->utsname->nodename : NULL); } static int get_config_hooks(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { char *subkey; int len, fulllen = 0, found = -1; struct lxc_list *it; int i; subkey = strchr(key, '.'); if (!subkey) return -1; subkey = strchr(subkey + 1, '.'); if (!subkey) return -1; subkey++; if (*subkey == '\0') return -1; for (i = 0; i < NUM_LXC_HOOKS; i++) { if (strcmp(lxchook_names[i], subkey) == 0) { found = i; break; } } if (found == -1) return -1; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->hooks[found]) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_hooks_version(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->hooks_version); } static int get_config_net(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->network) { struct lxc_netdev *n = it->elem; const char *t = lxc_net_type_to_str(n->type); strprint(retv, inlen, "%s\n", t ? t : "(invalid)"); } return fulllen; } static int get_config_cap_drop(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->caps) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_cap_keep(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->keepcaps) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_console_path(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->console.path); } static int get_config_console_logfile(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->console.log_path); } static int get_config_console_rotate(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->console.log_rotate); } static int get_config_console_buffer_size(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_uint64(c, retv, inlen, c->console.buffer_size); } static int get_config_console_size(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_uint64(c, retv, inlen, c->console.log_size); } static int get_config_seccomp_allow_nesting(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { #ifdef HAVE_SECCOMP return lxc_get_conf_int(c, retv, inlen, c->seccomp.allow_nesting); #else errno = ENOSYS; return -1; #endif } static int get_config_seccomp_notify_cookie(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { #ifdef HAVE_SECCOMP_NOTIFY return lxc_get_conf_str(retv, inlen, c->seccomp.notifier.cookie); #else return minus_one_set_errno(ENOSYS); #endif } static int get_config_seccomp_notify_proxy(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { #ifdef HAVE_SECCOMP_NOTIFY return lxc_get_conf_str(retv, inlen, (c->seccomp.notifier.proxy_addr.sun_path[0]) == '/' ? &c->seccomp.notifier.proxy_addr.sun_path[0] : &c->seccomp.notifier.proxy_addr.sun_path[1]); #else return minus_one_set_errno(ENOSYS); #endif } static int get_config_seccomp_profile(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->seccomp.seccomp); } static int get_config_autodev(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->autodev); } static int get_config_autodev_tmpfs_size(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->autodevtmpfssize); } static int get_config_signal_halt(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->haltsignal); } static int get_config_signal_reboot(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->rebootsignal); } static int get_config_signal_stop(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->stopsignal); } static int get_config_start(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { if (strcmp(key + 10, "auto") == 0) return lxc_get_conf_int(c, retv, inlen, c->start_auto); else if (strcmp(key + 10, "delay") == 0) return lxc_get_conf_int(c, retv, inlen, c->start_delay); else if (strcmp(key + 10, "order") == 0) return lxc_get_conf_int(c, retv, inlen, c->start_order); return -1; } static int get_config_log_syslog(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->syslog); } static int get_config_monitor(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->monitor_unshare); } static int get_config_monitor_signal_pdeath(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->monitor_signal_pdeath); } static int get_config_group(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->groups) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_environment(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, fulllen = 0; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); lxc_list_for_each(it, &c->environment) { strprint(retv, inlen, "%s\n", (char *)it->elem); } return fulllen; } static int get_config_execute_cmd(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->execute_cmd); } static int get_config_init_cmd(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->init_cmd); } static int get_config_init_cwd(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_str(retv, inlen, c->init_cwd); } static int get_config_init_uid(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->init_uid); } static int get_config_init_gid(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->init_gid); } static int get_config_ephemeral(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->ephemeral); } static int get_config_no_new_privs(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return lxc_get_conf_int(c, retv, inlen, c->no_new_privs); } /* If you ask for a specific value, i.e. lxc.prlimit.nofile, then just the value * will be printed. If you ask for 'lxc.prlimit', then all limit entries will be * printed, in 'lxc.prlimit.resource = value' format. */ static int get_config_prlimit(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int fulllen = 0, len; bool get_all = false; struct lxc_list *it; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!strcmp(key, "lxc.prlimit")) get_all = true; else if (strncmp(key, "lxc.prlimit.", 12) == 0) key += 12; else return -1; lxc_list_for_each(it, &c->limits) { /* 2 colon separated 64 bit integers or the word 'unlimited' */ char buf[INTTYPE_TO_STRLEN(uint64_t) * 2 + 2]; int partlen; struct lxc_limit *lim = it->elem; if (lim->limit.rlim_cur == RLIM_INFINITY) { memcpy(buf, "unlimited", STRLITERALLEN("unlimited") + 1); partlen = STRLITERALLEN("unlimited"); } else { partlen = sprintf(buf, "%" PRIu64, (uint64_t)lim->limit.rlim_cur); } if (lim->limit.rlim_cur != lim->limit.rlim_max) { if (lim->limit.rlim_max == RLIM_INFINITY) memcpy(buf + partlen, ":unlimited", STRLITERALLEN(":unlimited") + 1); else sprintf(buf + partlen, ":%" PRIu64, (uint64_t)lim->limit.rlim_max); } if (get_all) { strprint(retv, inlen, "lxc.prlimit.%s = %s\n", lim->resource, buf); } else if (strcmp(lim->resource, key) == 0) { strprint(retv, inlen, "%s", buf); } } return fulllen; } /* If you ask for a specific value, i.e. lxc.sysctl.net.ipv4.ip_forward, then * just the value will be printed. If you ask for 'lxc.sysctl', then all sysctl * entries will be printed, in 'lxc.sysctl.key = value' format. */ static int get_config_sysctl(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; struct lxc_list *it; int fulllen = 0; bool get_all = false; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (strcmp(key, "lxc.sysctl") == 0) get_all = true; else if (strncmp(key, "lxc.sysctl.", STRLITERALLEN("lxc.sysctl.")) == 0) key += STRLITERALLEN("lxc.sysctl."); else return -1; lxc_list_for_each(it, &c->sysctls) { struct lxc_sysctl *elem = it->elem; if (get_all) { strprint(retv, inlen, "lxc.sysctl.%s = %s\n", elem->key, elem->value); } else if (strcmp(elem->key, key) == 0) { strprint(retv, inlen, "%s", elem->value); } } return fulllen; } static int get_config_proc(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { struct lxc_list *it; int len; int fulllen = 0; bool get_all = false; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (strcmp(key, "lxc.proc") == 0) get_all = true; else if (strncmp(key, "lxc.proc.", STRLITERALLEN("lxc.proc.")) == 0) key += STRLITERALLEN("lxc.proc."); else return -1; lxc_list_for_each(it, &c->procs) { struct lxc_proc *proc = it->elem; if (get_all) { strprint(retv, inlen, "lxc.proc.%s = %s\n", proc->filename, proc->value); } else if (strcmp(proc->filename, key) == 0) { strprint(retv, inlen, "%s", proc->value); } } return fulllen; } static int get_config_namespace_clone(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int i, len; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); for (i = 0; i < LXC_NS_MAX; i++) { if (c->ns_clone & ns_info[i].clone_flag) strprint(retv, inlen, "%s\n", ns_info[i].proc_name); } return fulllen; } static int get_config_namespace_keep(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int i, len; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); for (i = 0; i < LXC_NS_MAX; i++) { if (c->ns_keep & ns_info[i].clone_flag) strprint(retv, inlen, "%s\n", ns_info[i].proc_name); } return fulllen; } static int get_config_namespace_share(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len, ns_idx; const char *namespace; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); namespace = key + STRLITERALLEN("lxc.namespace.share."); ns_idx = lxc_namespace_2_ns_idx(namespace); if (ns_idx < 0) return ns_idx; strprint(retv, inlen, "%s", c->ns_share[ns_idx]); return fulllen; } /* Callbacks to clear config items. */ static inline int clr_config_personality(const char *key, struct lxc_conf *c, void *data) { c->personality = -1; return 0; } static inline int clr_config_pty_max(const char *key, struct lxc_conf *c, void *data) { c->pty_max = 0; return 0; } static inline int clr_config_tty_max(const char *key, struct lxc_conf *c, void *data) { c->ttys.tty = 0; return 0; } static inline int clr_config_tty_dir(const char *key, struct lxc_conf *c, void *data) { free(c->ttys.dir); c->ttys.dir = NULL; return 0; } static inline int clr_config_apparmor_profile(const char *key, struct lxc_conf *c, void *data) { free(c->lsm_aa_profile); c->lsm_aa_profile = NULL; return 0; } static inline int clr_config_apparmor_allow_incomplete(const char *key, struct lxc_conf *c, void *data) { c->lsm_aa_allow_incomplete = 0; return 0; } static inline int clr_config_apparmor_allow_nesting(const char *key, struct lxc_conf *c, void *data) { c->lsm_aa_allow_nesting = 0; return 0; } static inline int clr_config_apparmor_raw(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_apparmor_raw(c); } static inline int clr_config_selinux_context(const char *key, struct lxc_conf *c, void *data) { free(c->lsm_se_context); c->lsm_se_context = NULL; return 0; } static inline int clr_config_cgroup_controller(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_cgroups(c, key, CGROUP_SUPER_MAGIC); } static inline int clr_config_cgroup2_controller(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_cgroups(c, key, CGROUP2_SUPER_MAGIC); } static int clr_config_cgroup_dir(const char *key, struct lxc_conf *lxc_conf, void *data) { if (lxc_conf->cgroup_meta.dir) { free(lxc_conf->cgroup_meta.dir); lxc_conf->cgroup_meta.dir = NULL; } return 0; } static inline int clr_config_cgroup_relative(const char *key, struct lxc_conf *lxc_conf, void *data) { lxc_conf->cgroup_meta.relative = false; return 0; } static inline int clr_config_idmaps(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_idmaps(c); } static inline int clr_config_log_level(const char *key, struct lxc_conf *c, void *data) { c->loglevel = LXC_LOG_LEVEL_NOTSET; return 0; } static inline int clr_config_log_file(const char *key, struct lxc_conf *c, void *data) { free(c->logfile); c->logfile = NULL; return 0; } static inline int clr_config_mount(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_mount_entries(c); } static inline int clr_config_mount_auto(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_automounts(c); } static inline int clr_config_mount_fstab(const char *key, struct lxc_conf *c, void *data) { free(c->fstab); c->fstab = NULL; return 0; } static inline int clr_config_rootfs_path(const char *key, struct lxc_conf *c, void *data) { free(c->rootfs.path); c->rootfs.path = NULL; return 0; } static inline int clr_config_rootfs_managed(const char *key, struct lxc_conf *c, void *data) { c->rootfs.managed = true; return 0; } static inline int clr_config_rootfs_mount(const char *key, struct lxc_conf *c, void *data) { free(c->rootfs.mount); c->rootfs.mount = NULL; return 0; } static inline int clr_config_rootfs_options(const char *key, struct lxc_conf *c, void *data) { free(c->rootfs.options); c->rootfs.options = NULL; free(c->rootfs.data); c->rootfs.data = NULL; return 0; } static inline int clr_config_uts_name(const char *key, struct lxc_conf *c, void *data) { free(c->utsname); c->utsname = NULL; return 0; } static inline int clr_config_hooks(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_hooks(c, key); } static inline int clr_config_hooks_version(const char *key, struct lxc_conf *c, void *data) { /* default to legacy hooks version */ c->hooks_version = 0; return 0; } static inline int clr_config_net(const char *key, struct lxc_conf *c, void *data) { lxc_free_networks(&c->network); return 0; } static inline int clr_config_cap_drop(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_config_caps(c); } static inline int clr_config_cap_keep(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_config_keepcaps(c); } static inline int clr_config_console_path(const char *key, struct lxc_conf *c, void *data) { free(c->console.path); c->console.path = NULL; return 0; } static inline int clr_config_console_logfile(const char *key, struct lxc_conf *c, void *data) { free(c->console.log_path); c->console.log_path = NULL; return 0; } static inline int clr_config_console_rotate(const char *key, struct lxc_conf *c, void *data) { c->console.log_rotate = 0; return 0; } static inline int clr_config_console_buffer_size(const char *key, struct lxc_conf *c, void *data) { c->console.buffer_size = 0; return 0; } static inline int clr_config_console_size(const char *key, struct lxc_conf *c, void *data) { c->console.log_size = 0; return 0; } static inline int clr_config_seccomp_allow_nesting(const char *key, struct lxc_conf *c, void *data) { #ifdef HAVE_SECCOMP c->seccomp.allow_nesting = 0; return 0; #else errno = ENOSYS; return -1; #endif } static inline int clr_config_seccomp_notify_cookie(const char *key, struct lxc_conf *c, void *data) { #ifdef HAVE_SECCOMP_NOTIFY free(c->seccomp.notifier.cookie); c->seccomp.notifier.cookie = NULL; return 0; #else return minus_one_set_errno(ENOSYS); #endif } static inline int clr_config_seccomp_notify_proxy(const char *key, struct lxc_conf *c, void *data) { #ifdef HAVE_SECCOMP_NOTIFY memset(&c->seccomp.notifier.proxy_addr, 0, sizeof(c->seccomp.notifier.proxy_addr)); return 0; #else return minus_one_set_errno(ENOSYS); #endif } static inline int clr_config_seccomp_profile(const char *key, struct lxc_conf *c, void *data) { free(c->seccomp.seccomp); c->seccomp.seccomp = NULL; return 0; } static inline int clr_config_autodev(const char *key, struct lxc_conf *c, void *data) { c->autodev = 1; return 0; } static inline int clr_config_autodev_tmpfs_size(const char *key, struct lxc_conf *c, void *data) { c->autodevtmpfssize = 500000; return 0; } static inline int clr_config_signal_halt(const char *key, struct lxc_conf *c, void *data) { c->haltsignal = 0; return 0; } static inline int clr_config_signal_reboot(const char *key, struct lxc_conf *c, void *data) { c->rebootsignal = 0; return 0; } static inline int clr_config_signal_stop(const char *key, struct lxc_conf *c, void *data) { c->stopsignal = 0; return 0; } static inline int clr_config_start(const char *key, struct lxc_conf *c, void *data) { if (strcmp(key + 10, "auto") == 0) c->start_auto = 0; else if (strcmp(key + 10, "delay") == 0) c->start_delay = 0; else if (strcmp(key + 10, "order") == 0) c->start_order = 0; return 0; } static inline int clr_config_log_syslog(const char *key, struct lxc_conf *c, void *data) { free(c->syslog); c->syslog = NULL; return 0; } static inline int clr_config_monitor(const char *key, struct lxc_conf *c, void *data) { c->monitor_unshare = 0; return 0; } static inline int clr_config_monitor_signal_pdeath(const char *key, struct lxc_conf *c, void *data) { c->monitor_signal_pdeath = 0; return 0; } static inline int clr_config_group(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_groups(c); } static inline int clr_config_environment(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_environment(c); } static inline int clr_config_execute_cmd(const char *key, struct lxc_conf *c, void *data) { free(c->execute_cmd); c->execute_cmd = NULL; return 0; } static inline int clr_config_init_cmd(const char *key, struct lxc_conf *c, void *data) { free(c->init_cmd); c->init_cmd = NULL; return 0; } static inline int clr_config_init_cwd(const char *key, struct lxc_conf *c, void *data) { free(c->init_cwd); c->init_cwd = NULL; return 0; } static inline int clr_config_init_uid(const char *key, struct lxc_conf *c, void *data) { c->init_uid = 0; return 0; } static inline int clr_config_init_gid(const char *key, struct lxc_conf *c, void *data) { c->init_gid = 0; return 0; } static inline int clr_config_ephemeral(const char *key, struct lxc_conf *c, void *data) { c->ephemeral = 0; return 0; } static inline int clr_config_no_new_privs(const char *key, struct lxc_conf *c, void *data) { c->no_new_privs = false; return 0; } static inline int clr_config_prlimit(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_limits(c, key); } static inline int clr_config_sysctl(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_sysctls(c, key); } static inline int clr_config_proc(const char *key, struct lxc_conf *c, void *data) { return lxc_clear_procs(c, key); } static inline int clr_config_includefiles(const char *key, struct lxc_conf *c, void *data) { lxc_clear_includes(c); return 0; } static int clr_config_namespace_clone(const char *key, struct lxc_conf *lxc_conf, void *data) { lxc_conf->ns_clone = 0; return 0; } static int clr_config_namespace_keep(const char *key, struct lxc_conf *lxc_conf, void *data) { lxc_conf->ns_keep = 0; return 0; } static int clr_config_namespace_share(const char *key, struct lxc_conf *lxc_conf, void *data) { int ns_idx; const char *namespace; namespace = key + STRLITERALLEN("lxc.namespace.share."); ns_idx = lxc_namespace_2_ns_idx(namespace); if (ns_idx < 0) return ns_idx; free(lxc_conf->ns_share[ns_idx]); lxc_conf->ns_share[ns_idx] = NULL; return 0; } static int get_config_includefiles(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { return -ENOSYS; } static struct lxc_config_t *get_network_config_ops(const char *key, struct lxc_conf *lxc_conf, ssize_t *idx, char **deindexed_key) { int ret; unsigned int tmpidx; size_t numstrlen; char *copy, *idx_start, *idx_end; struct lxc_config_t *config = NULL; /* check that this is a sensible network key */ if (strncmp("lxc.net.", key, 8)) { ERROR("Invalid network configuration key \"%s\"", key); return NULL; } copy = strdup(key); if (!copy) { ERROR("Failed to duplicate string \"%s\"", key); return NULL; } /* lxc.net. */ if (!isdigit(*(key + 8))) { ERROR("Failed to detect digit in string \"%s\"", key + 8); goto on_error; } /* beginning of index string */ idx_start = (copy + 7); *idx_start = '\0'; /* end of index string */ idx_end = strchr((copy + 8), '.'); if (idx_end) *idx_end = '\0'; /* parse current index */ ret = lxc_safe_uint((idx_start + 1), &tmpidx); if (ret < 0) { errno = -ret; SYSERROR("Failed to parse unsigned integer from string \"%s\"", idx_start + 1); *idx = ret; goto on_error; } /* This, of course is utterly nonsensical on so many levels, but * better safe than sorry. * (Checking for INT_MAX here is intentional.) */ if (tmpidx == INT_MAX) { SYSERROR("Number of configured networks would overflow the " "counter"); goto on_error; } *idx = tmpidx; numstrlen = strlen((idx_start + 1)); /* repair configuration key */ *idx_start = '.'; /* lxc.net.. */ if (idx_end) { *idx_end = '.'; if (strlen(idx_end + 1) == 0) { ERROR("No subkey in network configuration key \"%s\"", key); goto on_error; } memmove(copy + 8, idx_end + 1, strlen(idx_end + 1)); copy[strlen(key) - numstrlen + 1] = '\0'; config = lxc_get_config(copy); if (!config) { ERROR("Unknown network configuration key \"%s\"", key); goto on_error; } } if (deindexed_key) *deindexed_key = copy; return config; on_error: free(copy); return NULL; } /* Config entry is something like "lxc.net.0.ipv4" the key 'lxc.net.' was * found. So we make sure next comes an integer, find the right callback (by * rewriting the key), and call it. */ static int set_config_net_nic(const char *key, const char *value, struct lxc_conf *lxc_conf, void *data) { int ret; const char *idxstring; struct lxc_config_t *config; struct lxc_netdev *netdev; ssize_t idx = -1; char *deindexed_key = NULL; idxstring = key + 8; if (!isdigit(*idxstring)) return -1; if (lxc_config_value_empty(value)) return clr_config_net_nic(key, lxc_conf, data); config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key); if (!config || idx < 0) return -1; netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, true); if (!netdev) { free(deindexed_key); return -1; } ret = config->set(deindexed_key, value, lxc_conf, netdev); free(deindexed_key); return ret; } static int clr_config_net_nic(const char *key, struct lxc_conf *lxc_conf, void *data) { int ret; const char *idxstring; struct lxc_config_t *config; struct lxc_netdev *netdev; ssize_t idx = -1; char *deindexed_key = NULL; idxstring = key + 8; if (!isdigit(*idxstring)) return -1; /* The left conjunct is pretty self-explanatory. The right conjunct * checks whether the two pointers are equal. If they are we know that * this is not a key that is namespaced any further and so we are * supposed to clear the whole network. */ if (isdigit(*idxstring) && (strrchr(key, '.') == (idxstring - 1))) { unsigned int rmnetdevidx; if (lxc_safe_uint(idxstring, &rmnetdevidx) < 0) return -1; /* Remove network from network list. */ lxc_remove_nic_by_idx(lxc_conf, rmnetdevidx); return 0; } config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key); if (!config || idx < 0) return -1; netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, false); if (!netdev) { free(deindexed_key); return -1; } ret = config->clr(deindexed_key, lxc_conf, netdev); free(deindexed_key); return ret; } static int clr_config_net_type(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; netdev->type = -1; return 0; } static int clr_config_net_name(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; netdev->name[0] = '\0'; return 0; } static int clr_config_net_flags(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; netdev->flags = 0; return 0; } static int clr_config_net_link(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; netdev->link[0] = '\0'; return 0; } static int clr_config_net_l2proxy(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return minus_one_set_errno(EINVAL); netdev->l2proxy = false; return 0; } static int clr_config_net_macvlan_mode(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; if (netdev->type != LXC_NET_MACVLAN) return 0; netdev->priv.macvlan_attr.mode = -1; return 0; } static int clr_config_net_ipvlan_mode(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_IPVLAN) return 0; netdev->priv.ipvlan_attr.mode = -1; return 0; } static int clr_config_net_ipvlan_isolation(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_IPVLAN) return 0; netdev->priv.ipvlan_attr.isolation = -1; return 0; } static int clr_config_net_veth_mode(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_VETH) return 0; netdev->priv.veth_attr.mode = -1; return 0; } static int clr_config_net_veth_pair(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; netdev->priv.veth_attr.pair[0] = '\0'; return 0; } static int clr_config_net_script_up(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; free(netdev->upscript); netdev->upscript = NULL; return 0; } static int clr_config_net_script_down(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; free(netdev->downscript); netdev->downscript = NULL; return 0; } static int clr_config_net_hwaddr(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; free(netdev->hwaddr); netdev->hwaddr = NULL; return 0; } static int clr_config_net_mtu(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; free(netdev->mtu); netdev->mtu = NULL; return 0; } static int clr_config_net_vlan_id(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; netdev->priv.vlan_attr.vid = 0; return 0; } static int clr_config_net_ipv4_gateway(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; free(netdev->ipv4_gateway); netdev->ipv4_gateway = NULL; return 0; } static int clr_config_net_ipv4_address(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; struct lxc_list *cur, *next; if (!netdev) return -1; lxc_list_for_each_safe(cur, &netdev->ipv4, next) { lxc_list_del(cur); free(cur->elem); free(cur); } return 0; } static int clr_config_net_veth_ipv4_route(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; struct lxc_list *cur, *next; if (!netdev) return -1; lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv4_routes, next) { lxc_list_del(cur); free(cur->elem); free(cur); } return 0; } static int clr_config_net_ipv6_gateway(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; if (!netdev) return -1; free(netdev->ipv6_gateway); netdev->ipv6_gateway = NULL; return 0; } static int clr_config_net_ipv6_address(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; struct lxc_list *cur, *next; if (!netdev) return -1; lxc_list_for_each_safe(cur, &netdev->ipv6, next) { lxc_list_del(cur); free(cur->elem); free(cur); } return 0; } static int clr_config_net_veth_ipv6_route(const char *key, struct lxc_conf *lxc_conf, void *data) { struct lxc_netdev *netdev = data; struct lxc_list *cur, *next; if (!netdev) return -1; lxc_list_for_each_safe(cur, &netdev->priv.veth_attr.ipv6_routes, next) { lxc_list_del(cur); free(cur->elem); free(cur); } return 0; } static int get_config_net_nic(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int ret; const char *idxstring; struct lxc_config_t *config; struct lxc_netdev *netdev; ssize_t idx = -1; char *deindexed_key = NULL; idxstring = key + 8; if (!isdigit(*idxstring)) return -1; config = get_network_config_ops(key, c, &idx, &deindexed_key); if (!config || idx < 0) return -1; netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false); if (!netdev) { free(deindexed_key); return -1; } ret = config->get(deindexed_key, retv, inlen, c, netdev); free(deindexed_key); return ret; } static int get_config_net_type(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; strprint(retv, inlen, "%s", lxc_net_type_to_str(netdev->type)); return fulllen; } static int get_config_net_flags(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->flags & IFF_UP) strprint(retv, inlen, "up"); return fulllen; } static int get_config_net_link(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->link[0] != '\0') strprint(retv, inlen, "%s", netdev->link); return fulllen; } static int get_config_net_l2proxy(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { struct lxc_netdev *netdev = data; return lxc_get_conf_bool(c, retv, inlen, netdev->l2proxy); } static int get_config_net_name(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->name[0] != '\0') strprint(retv, inlen, "%s", netdev->name); return fulllen; } static int get_config_net_macvlan_mode(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; const char *mode; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->type != LXC_NET_MACVLAN) return 0; switch (netdev->priv.macvlan_attr.mode) { case MACVLAN_MODE_PRIVATE: mode = "private"; break; case MACVLAN_MODE_VEPA: mode = "vepa"; break; case MACVLAN_MODE_BRIDGE: mode = "bridge"; break; case MACVLAN_MODE_PASSTHRU: mode = "passthru"; break; default: mode = "(invalid)"; break; } strprint(retv, inlen, "%s", mode); return fulllen; } static int get_config_net_ipvlan_mode(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; const char *mode; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_IPVLAN) return 0; switch (netdev->priv.ipvlan_attr.mode) { case IPVLAN_MODE_L3: mode = "l3"; break; case IPVLAN_MODE_L3S: mode = "l3s"; break; case IPVLAN_MODE_L2: mode = "l2"; break; default: mode = "(invalid)"; break; } strprint(retv, inlen, "%s", mode); return fulllen; } static int get_config_net_ipvlan_isolation(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; const char *mode; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_IPVLAN) return 0; switch (netdev->priv.ipvlan_attr.isolation) { case IPVLAN_ISOLATION_BRIDGE: mode = "bridge"; break; case IPVLAN_ISOLATION_PRIVATE: mode = "private"; break; case IPVLAN_ISOLATION_VEPA: mode = "vepa"; break; default: mode = "(invalid)"; break; } strprint(retv, inlen, "%s", mode); return fulllen; } static int get_config_net_veth_mode(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; const char *mode; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_VETH) return 0; switch (netdev->priv.veth_attr.mode) { case VETH_MODE_BRIDGE: mode = "bridge"; break; case VETH_MODE_ROUTER: mode = "router"; break; default: mode = "(invalid)"; break; } strprint(retv, inlen, "%s", mode); return fulllen; } static int get_config_net_veth_pair(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->type != LXC_NET_VETH) return 0; strprint(retv, inlen, "%s", netdev->priv.veth_attr.pair[0] != '\0' ? netdev->priv.veth_attr.pair : netdev->priv.veth_attr.veth1); return fulllen; } static int get_config_net_script_up(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->upscript) strprint(retv, inlen, "%s", netdev->upscript); return fulllen; } static int get_config_net_script_down(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->downscript) strprint(retv, inlen, "%s", netdev->downscript); return fulllen; } static int get_config_net_hwaddr(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->hwaddr) strprint(retv, inlen, "%s", netdev->hwaddr); return fulllen; } static int get_config_net_mtu(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->mtu) strprint(retv, inlen, "%s", netdev->mtu); return fulllen; } static int get_config_net_vlan_id(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->type != LXC_NET_VLAN) return 0; strprint(retv, inlen, "%d", netdev->priv.vlan_attr.vid); return fulllen; } static int get_config_net_ipv4_gateway(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; char buf[INET_ADDRSTRLEN]; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->ipv4_gateway_auto) { strprint(retv, inlen, "auto"); } else if (netdev->ipv4_gateway_dev) { strprint(retv, inlen, "dev"); } else if (netdev->ipv4_gateway) { inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); strprint(retv, inlen, "%s", buf); } return fulllen; } static int get_config_net_ipv4_address(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; size_t listlen; char buf[INET_ADDRSTRLEN]; struct lxc_list *it; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; listlen = lxc_list_len(&netdev->ipv4); lxc_list_for_each(it, &netdev->ipv4) { struct lxc_inetdev *i = it->elem; inet_ntop(AF_INET, &i->addr, buf, sizeof(buf)); strprint(retv, inlen, "%s/%u%s", buf, i->prefix, (listlen-- > 1) ? "\n" : ""); } return fulllen; } static int get_config_net_veth_ipv4_route(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; size_t listlen; char buf[INET_ADDRSTRLEN]; struct lxc_list *it; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_VETH) return 0; listlen = lxc_list_len(&netdev->priv.veth_attr.ipv4_routes); lxc_list_for_each(it, &netdev->priv.veth_attr.ipv4_routes) { struct lxc_inetdev *i = it->elem; inet_ntop(AF_INET, &i->addr, buf, sizeof(buf)); strprint(retv, inlen, "%s/%u%s", buf, i->prefix, (listlen-- > 1) ? "\n" : ""); } return fulllen; } static int get_config_net_ipv6_gateway(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; char buf[INET6_ADDRSTRLEN]; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; if (netdev->ipv6_gateway_auto) { strprint(retv, inlen, "auto"); } else if (netdev->ipv6_gateway_dev) { strprint(retv, inlen, "dev"); } else if (netdev->ipv6_gateway) { inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); strprint(retv, inlen, "%s", buf); } return fulllen; } static int get_config_net_ipv6_address(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; size_t listlen; char buf[INET6_ADDRSTRLEN]; struct lxc_list *it; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return -1; listlen = lxc_list_len(&netdev->ipv6); lxc_list_for_each(it, &netdev->ipv6) { struct lxc_inet6dev *i = it->elem; inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf)); strprint(retv, inlen, "%s/%u%s", buf, i->prefix, (listlen-- > 1) ? "\n" : ""); } return fulllen; } static int get_config_net_veth_ipv6_route(const char *key, char *retv, int inlen, struct lxc_conf *c, void *data) { int len; size_t listlen; char buf[INET6_ADDRSTRLEN]; struct lxc_list *it; int fulllen = 0; struct lxc_netdev *netdev = data; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!netdev) return minus_one_set_errno(EINVAL); if (netdev->type != LXC_NET_VETH) return 0; listlen = lxc_list_len(&netdev->priv.veth_attr.ipv6_routes); lxc_list_for_each(it, &netdev->priv.veth_attr.ipv6_routes) { struct lxc_inet6dev *i = it->elem; inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf)); strprint(retv, inlen, "%s/%u%s", buf, i->prefix, (listlen-- > 1) ? "\n" : ""); } return fulllen; } int lxc_list_config_items(char *retv, int inlen) { size_t i; int len; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); for (i = 0; i < config_jump_table_size; i++) { char *s = config_jump_table[i].name; if (s[strlen(s) - 1] == '.') continue; strprint(retv, inlen, "%s\n", s); } return fulllen; } int lxc_list_subkeys(struct lxc_conf *conf, const char *key, char *retv, int inlen) { int len; int fulllen = 0; if (!retv) inlen = 0; else memset(retv, 0, inlen); if (!strcmp(key, "lxc.apparmor")) { strprint(retv, inlen, "allow_incomplete\n"); strprint(retv, inlen, "allow_nesting\n"); strprint(retv, inlen, "profile\n"); strprint(retv, inlen, "raw\n"); } else if (!strcmp(key, "lxc.cgroup")) { strprint(retv, inlen, "dir\n"); } else if (!strcmp(key, "lxc.selinux")) { strprint(retv, inlen, "context\n"); } else if (!strcmp(key, "lxc.mount")) { strprint(retv, inlen, "auto\n"); strprint(retv, inlen, "entry\n"); strprint(retv, inlen, "fstab\n"); } else if (!strcmp(key, "lxc.rootfs")) { strprint(retv, inlen, "mount\n"); strprint(retv, inlen, "options\n"); strprint(retv, inlen, "path\n"); } else if (!strcmp(key, "lxc.uts")) { strprint(retv, inlen, "name\n"); } else if (!strcmp(key, "lxc.hook")) { strprint(retv, inlen, "autodev\n"); strprint(retv, inlen, "autodevtmpfssize\n"); strprint(retv, inlen, "clone\n"); strprint(retv, inlen, "destroy\n"); strprint(retv, inlen, "mount\n"); strprint(retv, inlen, "post-stop\n"); strprint(retv, inlen, "pre-mount\n"); strprint(retv, inlen, "pre-start\n"); strprint(retv, inlen, "start-host\n"); strprint(retv, inlen, "start\n"); strprint(retv, inlen, "stop\n"); } else if (!strcmp(key, "lxc.cap")) { strprint(retv, inlen, "drop\n"); strprint(retv, inlen, "keep\n"); } else if (!strcmp(key, "lxc.console")) { strprint(retv, inlen, "logfile\n"); strprint(retv, inlen, "path\n"); } else if (!strcmp(key, "lxc.seccomp")) { strprint(retv, inlen, "profile\n"); } else if (!strcmp(key, "lxc.signal")) { strprint(retv, inlen, "halt\n"); strprint(retv, inlen, "reboot\n"); strprint(retv, inlen, "stop\n"); } else if (!strcmp(key, "lxc.start")) { strprint(retv, inlen, "auto\n"); strprint(retv, inlen, "delay\n"); strprint(retv, inlen, "order\n"); } else if (!strcmp(key, "lxc.monitor")) { strprint(retv, inlen, "unshare\n"); } else { fulllen = -1; } return fulllen; } int lxc_list_net(struct lxc_conf *c, const char *key, char *retv, int inlen) { int len; const char *idxstring; struct lxc_netdev *netdev; int fulllen = 0; ssize_t idx = -1; idxstring = key + 8; if (!isdigit(*idxstring)) return -1; (void)get_network_config_ops(key, c, &idx, NULL); if (idx < 0) return -1; netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false); if (!netdev) return -1; if (!retv) inlen = 0; else memset(retv, 0, inlen); strprint(retv, inlen, "type\n"); strprint(retv, inlen, "script.up\n"); strprint(retv, inlen, "script.down\n"); if (netdev->type != LXC_NET_EMPTY) { strprint(retv, inlen, "flags\n"); strprint(retv, inlen, "link\n"); strprint(retv, inlen, "name\n"); strprint(retv, inlen, "hwaddr\n"); strprint(retv, inlen, "mtu\n"); strprint(retv, inlen, "ipv6.address\n"); strprint(retv, inlen, "ipv6.gateway\n"); strprint(retv, inlen, "ipv4.address\n"); strprint(retv, inlen, "ipv4.gateway\n"); } switch (netdev->type) { case LXC_NET_VETH: strprint(retv, inlen, "veth.pair\n"); strprint(retv, inlen, "veth.ipv4.route\n"); strprint(retv, inlen, "veth.ipv6.route\n"); break; case LXC_NET_MACVLAN: strprint(retv, inlen, "macvlan.mode\n"); break; case LXC_NET_IPVLAN: strprint(retv, inlen, "ipvlan.mode\n"); strprint(retv, inlen, "ipvlan.isolation\n"); break; case LXC_NET_VLAN: strprint(retv, inlen, "vlan.id\n"); break; case LXC_NET_PHYS: break; } return fulllen; }