#include <sys/eventfd.h>
#include <net/if.h>
#include <linux/veth.h>
+#include <sys/personality.h>
#ifdef HAVE_SELINUX
#include <selinux/selinux.h>
#include "rtnl-util.h"
#include "udev-util.h"
+#ifdef HAVE_SECCOMP
+#include "seccomp-util.h"
+#endif
+
typedef enum LinkJournal {
LINK_NO,
LINK_AUTO,
static char *arg_user = NULL;
static sd_id128_t arg_uuid = {};
static char *arg_machine = NULL;
-static char *arg_selinux_context = NULL;
-static char *arg_selinux_apifs_context = NULL;
+static const char *arg_selinux_context = NULL;
+static const char *arg_selinux_apifs_context = NULL;
static const char *arg_slice = NULL;
static bool arg_private_network = false;
static bool arg_read_only = false;
static bool arg_register = true;
static bool arg_keep_unit = false;
static char **arg_network_interfaces = NULL;
+static char **arg_network_macvlan = NULL;
static bool arg_network_veth = false;
-static char *arg_network_bridge = NULL;
+static const char *arg_network_bridge = NULL;
+static unsigned long arg_personality = 0xffffffffLU;
static int help(void) {
" --network-interface=INTERFACE\n"
" Assign an existing network interface to the\n"
" container\n"
+ " --network-macvlan=INTERFACE\n"
+ " Create a macvlan network interface based on an\n"
+ " existing network interface to the container\n"
" --network-veth Add a virtual ethernet connection between host\n"
" and container\n"
" --network-bridge=INTERFACE\n"
ARG_REGISTER,
ARG_KEEP_UNIT,
ARG_NETWORK_INTERFACE,
+ ARG_NETWORK_MACVLAN,
ARG_NETWORK_VETH,
ARG_NETWORK_BRIDGE,
+ ARG_PERSONALITY,
};
static const struct option options[] = {
{ "register", required_argument, NULL, ARG_REGISTER },
{ "keep-unit", no_argument, NULL, ARG_KEEP_UNIT },
{ "network-interface", required_argument, NULL, ARG_NETWORK_INTERFACE },
+ { "network-macvlan", required_argument, NULL, ARG_NETWORK_MACVLAN },
{ "network-veth", no_argument, NULL, ARG_NETWORK_VETH },
{ "network-bridge", required_argument, NULL, ARG_NETWORK_BRIDGE },
+ { "personality", required_argument, NULL, ARG_PERSONALITY },
{}
};
break;
case ARG_NETWORK_BRIDGE:
- arg_network_bridge = strdup(optarg);
- if (!arg_network_bridge)
- return log_oom();
+ arg_network_bridge = optarg;
/* fall through */
break;
case ARG_NETWORK_INTERFACE:
- if (strv_push(&arg_network_interfaces, optarg) < 0)
+ if (strv_extend(&arg_network_interfaces, optarg) < 0)
+ return log_oom();
+
+ arg_private_network = true;
+ break;
+
+ case ARG_NETWORK_MACVLAN:
+ if (strv_extend(&arg_network_macvlan, optarg) < 0)
return log_oom();
/* fall through */
break;
case 'S':
- arg_slice = strdup(optarg);
- if (!arg_slice)
- return log_oom();
-
+ arg_slice = optarg;
break;
case 'M':
arg_keep_unit = true;
break;
+ case ARG_PERSONALITY:
+
+ arg_personality = personality_from_string(optarg);
+ if (arg_personality == 0xffffffffLU) {
+ log_error("Unknown or unsupported personality '%s'.", optarg);
+ return -EINVAL;
+ }
+
+ break;
+
case '?':
return -EINVAL;
static int setup_boot_id(const char *dest) {
_cleanup_free_ char *from = NULL, *to = NULL;
- sd_id128_t rnd;
+ sd_id128_t rnd = {};
char as_uuid[37];
int r;
(uint32_t) pid,
strempty(arg_directory));
} else {
- r = sd_bus_call_method(
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+
+ r = sd_bus_message_new_method_call(
bus,
+ &m,
"org.freedesktop.machine1",
"/org/freedesktop/machine1",
"org.freedesktop.machine1.Manager",
- "CreateMachine",
- &error,
- NULL,
- "sayssusa(sv)",
+ "CreateMachine");
+ if (r < 0) {
+ log_error("Failed to create message: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_message_append(
+ m,
+ "sayssus",
arg_machine,
SD_BUS_MESSAGE_APPEND_ID128(arg_uuid),
"nspawn",
"container",
(uint32_t) pid,
- strempty(arg_directory),
- !isempty(arg_slice), "Slice", "s", arg_slice);
+ strempty(arg_directory));
+ if (r < 0) {
+ log_error("Failed to append message arguments: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_message_open_container(m, 'a', "(sv)");
+ if (r < 0) {
+ log_error("Failed to open container: %s", strerror(-r));
+ return r;
+ }
+
+ if (!isempty(arg_slice)) {
+ r = sd_bus_message_append(m, "(sv)", "Slice", "s", arg_slice);
+ if (r < 0) {
+ log_error("Failed to append slice: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ r = sd_bus_message_append(m, "(sv)", "DevicePolicy", "s", "strict");
+ if (r < 0) {
+ log_error("Failed to add device policy: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 8,
+ /* Allow the container to
+ * access and create the API
+ * device nodes, so that
+ * PrivateDevices= in the
+ * container can work
+ * fine */
+ "/dev/null", "rwm",
+ "/dev/zero", "rwm",
+ "/dev/full", "rwm",
+ "/dev/random", "rwm",
+ "/dev/urandom", "rwm",
+ "/dev/tty", "rwm",
+ /* Allow the container
+ * access to ptys. However,
+ * do not permit the
+ * container to ever create
+ * these device nodes. */
+ "/dev/pts/ptmx", "rw",
+ "char-pts", "rw");
+ if (r < 0) {
+ log_error("Failed to add device whitelist: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0) {
+ log_error("Failed to close container: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_call(bus, m, 0, &error, NULL);
}
if (r < 0) {
return 0;
r = read_one_line_file("/proc/self/loginuid", &p);
- if (r == -EEXIST)
+ if (r == -ENOENT)
return 0;
if (r < 0) {
log_error("Failed to read /proc/self/loginuid: %s", strerror(-r));
return 0;
}
-static int setup_veth(pid_t pid, char iface_name[]) {
+static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ]) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
int r;
if (!arg_network_veth)
return 0;
+ /* Use two different interface name prefixes depending whether
+ * we are in bridge mode or not. */
+ if (arg_network_bridge)
+ memcpy(iface_name, "vb-", 3);
+ else
+ memcpy(iface_name, "ve-", 3);
+
strncpy(iface_name+3, arg_machine, IFNAMSIZ - 3);
- r = sd_rtnl_open(0, &rtnl);
+ r = sd_rtnl_open(&rtnl, 0);
if (r < 0) {
log_error("Failed to connect to netlink: %s", strerror(-r));
return r;
}
- r = sd_rtnl_message_new_link(RTM_NEWLINK, 0, &m);
+ r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0);
if (r < 0) {
log_error("Failed to allocate netlink message: %s", strerror(-r));
return r;
return -errno;
}
- r = sd_rtnl_open(0, &rtnl);
+ r = sd_rtnl_open(&rtnl, 0);
if (r < 0) {
log_error("Failed to connect to netlink: %s", strerror(-r));
return r;
}
- r = sd_rtnl_message_new_link(RTM_SETLINK, 0, &m);
+ r = sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, 0);
if (r < 0) {
log_error("Failed to allocate netlink message: %s", strerror(-r));
return r;
return 0;
}
+static int parse_interface(struct udev *udev, const char *name) {
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+ char ifi_str[2 + DECIMAL_STR_MAX(int)];
+ int ifi;
+
+ ifi = (int) if_nametoindex(name);
+ if (ifi <= 0) {
+ log_error("Failed to resolve interface %s: %m", name);
+ return -errno;
+ }
+
+ sprintf(ifi_str, "n%i", ifi);
+ d = udev_device_new_from_device_id(udev, ifi_str);
+ if (!d) {
+ log_error("Failed to get udev device for interface %s: %m", name);
+ return -errno;
+ }
+
+ if (udev_device_get_is_initialized(d) <= 0) {
+ log_error("Network interface %s is not initialized yet.", name);
+ return -EBUSY;
+ }
+
+ return ifi;
+}
+
static int move_network_interfaces(pid_t pid) {
_cleanup_udev_unref_ struct udev *udev = NULL;
_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
if (strv_isempty(arg_network_interfaces))
return 0;
- r = sd_rtnl_open(0, &rtnl);
+ r = sd_rtnl_open(&rtnl, 0);
if (r < 0) {
log_error("Failed to connect to netlink: %s", strerror(-r));
return r;
STRV_FOREACH(i, arg_network_interfaces) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
- _cleanup_udev_device_unref_ struct udev_device *d = NULL;
- char ifi_str[2 + DECIMAL_STR_MAX(int)];
int ifi;
- ifi = (int) if_nametoindex(*i);
- if (ifi <= 0) {
- log_error("Failed to resolve interface %s: %m", *i);
- return -errno;
+ ifi = parse_interface(udev, *i);
+ if (ifi < 0)
+ return ifi;
+
+ r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, ifi);
+ if (r < 0) {
+ log_error("Failed to allocate netlink message: %s", strerror(-r));
+ return r;
}
- sprintf(ifi_str, "n%i", ifi);
- d = udev_device_new_from_device_id(udev, ifi_str);
- if (!d) {
- log_error("Failed to get udev device for interface %s: %m", *i);
- return -errno;
+ r = sd_rtnl_message_append_u32(m, IFLA_NET_NS_PID, pid);
+ if (r < 0) {
+ log_error("Failed to append namespace PID to netlink message: %s", strerror(-r));
+ return r;
}
- if (udev_device_get_is_initialized(d) <= 0) {
- log_error("Network interface %s is not initialized yet.", *i);
- return -EBUSY;
+ r = sd_rtnl_call(rtnl, m, 0, NULL);
+ if (r < 0) {
+ log_error("Failed to move interface %s to namespace: %s", *i, strerror(-r));
+ return r;
}
+ }
+
+ return 0;
+}
+
+static int setup_macvlan(pid_t pid) {
+ _cleanup_udev_unref_ struct udev *udev = NULL;
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ char **i;
+ int r;
+
+ if (!arg_private_network)
+ return 0;
+
+ if (strv_isempty(arg_network_macvlan))
+ return 0;
+
+ r = sd_rtnl_open(&rtnl, 0);
+ if (r < 0) {
+ log_error("Failed to connect to netlink: %s", strerror(-r));
+ return r;
+ }
- r = sd_rtnl_message_new_link(RTM_NEWLINK, ifi, &m);
+ udev = udev_new();
+ if (!udev) {
+ log_error("Failed to connect to udev.");
+ return -ENOMEM;
+ }
+
+ STRV_FOREACH(i, arg_network_macvlan) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
+ _cleanup_free_ char *n = NULL;
+ int ifi;
+
+ ifi = parse_interface(udev, *i);
+ if (ifi < 0)
+ return ifi;
+
+ r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0);
if (r < 0) {
log_error("Failed to allocate netlink message: %s", strerror(-r));
return r;
}
+ r = sd_rtnl_message_append_u32(m, IFLA_LINK, ifi);
+ if (r < 0) {
+ log_error("Failed to add netlink interface index: %s", strerror(-r));
+ return r;
+ }
+
+ n = strappend("mv-", *i);
+ if (!n)
+ return log_oom();
+
+ strshorten(n, IFNAMSIZ-1);
+
+ r = sd_rtnl_message_append_string(m, IFLA_IFNAME, n);
+ if (r < 0) {
+ log_error("Failed to add netlink interface name: %s", strerror(-r));
+ return r;
+ }
+
r = sd_rtnl_message_append_u32(m, IFLA_NET_NS_PID, pid);
if (r < 0) {
- log_error("Failed to append namespace PID to netlink message: %s", strerror(-r));
+ log_error("Failed to add netlink namespace field: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
+ if (r < 0) {
+ log_error("Failed to open netlink container: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_string(m, IFLA_INFO_KIND, "macvlan");
+ if (r < 0) {
+ log_error("Failed to append netlink kind: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_open_container(m, IFLA_INFO_DATA);
+ if (r < 0) {
+ log_error("Failed to open netlink container: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_u32(m, IFLA_MACVLAN_MODE, MACVLAN_MODE_BRIDGE);
+ if (r < 0) {
+ log_error("Failed to append macvlan mode: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_close_container(m);
+ if (r < 0) {
+ log_error("Failed to close netlink container: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_close_container(m);
+ if (r < 0) {
+ log_error("Failed to close netlink container: %s", strerror(-r));
return r;
}
r = sd_rtnl_call(rtnl, m, 0, NULL);
if (r < 0) {
- log_error("Failed to move interface %s to namespace: %s", *i, strerror(-r));
+ log_error("Failed to add new macvlan interfaces: %s", strerror(-r));
return r;
}
}
if (!seccomp)
return log_oom();
- r = seccomp_rule_add_exact(
+ r = seccomp_add_secondary_archs(seccomp);
+ if (r < 0) {
+ log_error("Failed to add secondary archs to seccomp filter: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = seccomp_rule_add(
seccomp,
SCMP_ACT_ERRNO(EAFNOSUPPORT),
SCMP_SYS(socket),
int main(int argc, char *argv[]) {
- _cleanup_close_ int master = -1, kdbus_fd = -1, sync_fd = -1, netns_fd = -1;
+ _cleanup_close_ int master = -1, kdbus_fd = -1, sync_fd = -1;
_cleanup_close_pipe_ int kmsg_socket_pair[2] = { -1, -1 };
_cleanup_free_ char *kdbus_domain = NULL;
_cleanup_fdset_free_ FDSet *fds = NULL;
int n_fd_passed;
pid_t pid = 0;
sigset_t mask;
- char veth_name[IFNAMSIZ] = "ve-";
+ char veth_name[IFNAMSIZ];
log_parse_environment();
log_open();
setup_hostname();
+ if (arg_personality != 0xffffffffLU) {
+ if (personality(arg_personality) < 0) {
+ log_error("personality() failed: %m");
+ goto child_fail;
+ }
+ }
+
eventfd_read(sync_fd, &x);
close_nointr_nofail(sync_fd);
sync_fd = -1;
#ifdef HAVE_SELINUX
if (arg_selinux_context)
- if (setexeccon(arg_selinux_context) < 0)
+ if (setexeccon((security_context_t) arg_selinux_context) < 0)
log_error("setexeccon(\"%s\") failed: %m", arg_selinux_context);
#endif
if (arg_boot) {
if (r < 0)
goto finish;
+ r = setup_macvlan(pid);
+ if (r < 0)
+ goto finish;
+
eventfd_write(sync_fd, 1);
close_nointr_nofail(sync_fd);
sync_fd = -1;
free(arg_directory);
free(arg_machine);
- free(arg_setenv);
- free(arg_network_interfaces);
+ free(arg_user);
+ strv_free(arg_setenv);
+ strv_free(arg_network_interfaces);
+ strv_free(arg_network_macvlan);
+ strv_free(arg_bind);
+ strv_free(arg_bind_ro);
return r;
}
~ianmdlvl / elogind.git / blobdiff