#include <stdio.h>
#include <errno.h>
#include <sys/prctl.h>
-#include <sys/capability.h>
#include <getopt.h>
#include <termios.h>
#include <sys/signalfd.h>
#include "base-filesystem.h"
#include "barrier.h"
#include "event-util.h"
+#include "capability.h"
#include "cap-list.h"
#include "btrfs-util.h"
+#include "machine-image.h"
+#include "list.h"
+#include "in-addr-util.h"
+#include "fw-util.h"
+#include "local-addresses.h"
#ifdef HAVE_SECCOMP
#include "seccomp-util.h"
#endif
+typedef struct ExposePort {
+ int protocol;
+ uint16_t host_port;
+ uint16_t container_port;
+ LIST_FIELDS(struct ExposePort, ports);
+} ExposePort;
+
typedef enum ContainerStatus {
CONTAINER_TERMINATED,
CONTAINER_REBOOTED
static unsigned long arg_personality = 0xffffffffLU;
static char *arg_image = NULL;
static Volatile arg_volatile = VOLATILE_NO;
+static ExposePort *arg_expose_ports = NULL;
static void help(void) {
printf("%s [OPTIONS...] [PATH] [ARGUMENTS...]\n\n"
" Add a virtual ethernet connection between host\n"
" and container and add it to an existing bridge on\n"
" the host\n"
+ " -p --port=[PROTOCOL:]HOSTPORT[:CONTAINERPORT]\n"
+ " Expose a container IP port ont the host\n"
" -Z --selinux-context=SECLABEL\n"
" Set the SELinux security context to be used by\n"
" processes in the container\n"
" --register=BOOLEAN Register container as machine\n"
" --keep-unit Do not register a scope for the machine, reuse\n"
" the service unit nspawn is running in\n"
- " --volatile[=MODE] Run the system in volatile mode\n",
- program_invocation_short_name);
+ " --volatile[=MODE] Run the system in volatile mode\n"
+ , program_invocation_short_name);
}
static int set_sanitized_path(char **b, const char *path) {
{ "personality", required_argument, NULL, ARG_PERSONALITY },
{ "image", required_argument, NULL, 'i' },
{ "volatile", optional_argument, NULL, ARG_VOLATILE },
+ { "port", required_argument, NULL, 'p' },
{}
};
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "+hD:u:bL:M:jS:Z:qi:x", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "+hD:u:bL:M:jS:Z:qi:xp:", options, NULL)) >= 0)
switch (c) {
break;
+ case 'p': {
+ const char *split, *e;
+ uint16_t container_port, host_port;
+ int protocol;
+ ExposePort *p;
+
+ if ((e = startswith(optarg, "tcp:")))
+ protocol = IPPROTO_TCP;
+ else if ((e = startswith(optarg, "udp:")))
+ protocol = IPPROTO_UDP;
+ else {
+ e = optarg;
+ protocol = IPPROTO_TCP;
+ }
+
+ split = strchr(e, ':');
+ if (split) {
+ char v[split - e + 1];
+
+ memcpy(v, e, split - e);
+ v[split - e] = 0;
+
+ r = safe_atou16(v, &host_port);
+ if (r < 0 || host_port <= 0) {
+ log_error("Failed to parse host port: %s", optarg);
+ return -EINVAL;
+ }
+
+ r = safe_atou16(split + 1, &container_port);
+ } else {
+ r = safe_atou16(e, &container_port);
+ host_port = container_port;
+ }
+
+ if (r < 0 || container_port <= 0) {
+ log_error("Failed to parse host port: %s", optarg);
+ return -EINVAL;
+ }
+
+ LIST_FOREACH(ports, p, arg_expose_ports) {
+ if (p->protocol == protocol && p->host_port == host_port) {
+ log_error("Duplicate port specification: %s", optarg);
+ return -EINVAL;
+ }
+ }
+
+ p = new(ExposePort, 1);
+ if (!p)
+ return log_oom();
+
+ p->protocol = protocol;
+ p->host_port = host_port;
+ p->container_port = container_port;
+
+ LIST_PREPEND(ports, arg_expose_ports, p);
+
+ break;
+ }
+
case '?':
return -EINVAL;
return -EINVAL;
}
+ if (arg_ephemeral && !IN_SET(arg_link_journal, LINK_NO, LINK_AUTO)) {
+ log_error("--ephemeral and --link-journal= may not be combined.");
+ return -EINVAL;
+ }
+
if (arg_volatile != VOLATILE_NO && arg_read_only) {
log_error("Cannot combine --read-only with --volatile. Note that --volatile already implies a read-only base hierarchy.");
return -EINVAL;
}
+ if (arg_expose_ports && !arg_private_network) {
+ log_error("Cannot use --port= without private networking.");
+ return -EINVAL;
+ }
+
arg_retain = (arg_retain | plus | (arg_private_network ? 1ULL << CAP_NET_ADMIN : 0)) & ~minus;
return 1;
return 0;
}
+static int mount_cgroup_hierarchy(const char *dest, const char *controller, const char *hierarchy, bool read_only) {
+ char *to;
+ int r;
+
+ to = strappenda(dest, "/sys/fs/cgroup/", hierarchy);
+
+ r = path_is_mount_point(to, false);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine if %s is mounted already: %m", to);
+ if (r > 0)
+ return 0;
+
+ mkdir_p(to, 0755);
+
+ if (mount("cgroup", to, "cgroup", MS_NOSUID|MS_NOEXEC|MS_NODEV|(read_only ? MS_RDONLY : 0), controller) < 0)
+ return log_error_errno(errno, "Failed to mount to %s: %m", to);
+
+ return 1;
+}
+
+static int mount_cgroup(const char *dest) {
+ _cleanup_set_free_free_ Set *controllers = NULL;
+ _cleanup_free_ char *own_cgroup_path = NULL;
+ const char *cgroup_root, *systemd_root, *systemd_own;
+ int r;
+
+ controllers = set_new(&string_hash_ops);
+ if (!controllers)
+ return log_oom();
+
+ r = cg_kernel_controllers(controllers);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine cgroup controllers: %m");
+
+ r = cg_pid_get_path(NULL, 0, &own_cgroup_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine our own cgroup path: %m");
+
+ cgroup_root = strappenda(dest, "/sys/fs/cgroup");
+ if (mount("tmpfs", cgroup_root, "tmpfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME, "mode=755") < 0)
+ return log_error_errno(errno, "Failed to mount tmpfs to /sys/fs/cgroup: %m");
+
+ for (;;) {
+ _cleanup_free_ char *controller = NULL, *origin = NULL, *combined = NULL;
+
+ controller = set_steal_first(controllers);
+ if (!controller)
+ break;
+
+ origin = strappend("/sys/fs/cgroup/", controller);
+ if (!origin)
+ return log_oom();
+
+ r = readlink_malloc(origin, &combined);
+ if (r == -EINVAL) {
+ /* Not a symbolic link, but directly a single cgroup hierarchy */
+
+ r = mount_cgroup_hierarchy(dest, controller, controller, true);
+ if (r < 0)
+ return r;
+
+ } else if (r < 0)
+ return log_error_errno(r, "Failed to read link %s: %m", origin);
+ else {
+ _cleanup_free_ char *target = NULL;
+
+ target = strjoin(dest, "/sys/fs/cgroup/", controller, NULL);
+ if (!target)
+ return log_oom();
+
+ /* A symbolic link, a combination of controllers in one hierarchy */
+
+ if (!filename_is_valid(combined)) {
+ log_warning("Ignoring invalid combined hierarchy %s.", combined);
+ continue;
+ }
+
+ r = mount_cgroup_hierarchy(dest, combined, combined, true);
+ if (r < 0)
+ return r;
+
+ if (symlink(combined, target) < 0)
+ return log_error_errno(errno, "Failed to create symlink for combined hiearchy: %m");
+ }
+ }
+
+ r = mount_cgroup_hierarchy(dest, "name=systemd", "systemd", false);
+ if (r < 0)
+ return r;
+
+ /* Make our own cgroup a (writable) bind mount */
+ systemd_own = strappenda(dest, "/sys/fs/cgroup/systemd", own_cgroup_path);
+ if (mount(systemd_own, systemd_own, NULL, MS_BIND, NULL) < 0)
+ return log_error_errno(errno, "Failed to turn %s into a bind mount: %m", own_cgroup_path);
+
+ /* And then remount the systemd cgroup root read-only */
+ systemd_root = strappenda(dest, "/sys/fs/cgroup/systemd");
+ if (mount(NULL, systemd_root, NULL, MS_BIND|MS_REMOUNT|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, NULL) < 0)
+ return log_error_errno(errno, "Failed to mount cgroup root read-only: %m");
+
+ if (mount(NULL, cgroup_root, NULL, MS_REMOUNT|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME|MS_RDONLY, "mode=755") < 0)
+ return log_error_errno(errno, "Failed to remount %s read-only: %m", cgroup_root);
+
+ return 0;
+}
+
static int mount_tmpfs(const char *dest) {
char **i, **o;
return 0;
}
- r = copy_file("/etc/resolv.conf", where, O_TRUNC|O_NOFOLLOW, 0644);
+ r = copy_file("/etc/resolv.conf", where, O_TRUNC|O_NOFOLLOW, 0644, 0);
if (r < 0) {
log_warning_errno(r, "Failed to copy /etc/resolv.conf to %s: %m", where);
}
if (mknod(to, st.st_mode, st.st_rdev) < 0)
- return log_error_errno(errno, "mknod(%s) failed: %m", dest);
+ return log_error_errno(errno, "mknod(%s) failed: %m", to);
}
}
static int setup_kmsg(const char *dest, int kmsg_socket) {
_cleanup_free_ char *from = NULL, *to = NULL;
- int r, fd, k;
_cleanup_umask_ mode_t u;
+ int r, fd, k;
union {
struct cmsghdr cmsghdr;
uint8_t buf[CMSG_SPACE(sizeof(int))];
/* Store away the fd in the socket, so that it stays open as
* long as we run the child */
- k = sendmsg(kmsg_socket, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
+ k = sendmsg(kmsg_socket, &mh, MSG_NOSIGNAL);
safe_close(fd);
if (k < 0)
return 0;
}
+static int send_rtnl(int send_fd) {
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(int))];
+ } control = {};
+ struct msghdr mh = {
+ .msg_control = &control,
+ .msg_controllen = sizeof(control),
+ };
+ struct cmsghdr *cmsg;
+ _cleanup_close_ int fd = -1;
+ ssize_t k;
+
+ assert(send_fd >= 0);
+
+ if (!arg_expose_ports)
+ return 0;
+
+ fd = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_ROUTE);
+ if (fd < 0)
+ return log_error_errno(errno, "failed to allocate container netlink: %m");
+
+ cmsg = CMSG_FIRSTHDR(&mh);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ memcpy(CMSG_DATA(cmsg), &fd, sizeof(int));
+
+ mh.msg_controllen = cmsg->cmsg_len;
+
+ /* Store away the fd in the socket, so that it stays open as
+ * long as we run the child */
+ k = sendmsg(send_fd, &mh, MSG_NOSIGNAL);
+ if (k < 0)
+ return log_error_errno(errno, "Failed to send netlink fd: %m");
+
+ return 0;
+}
+
+static int flush_ports(union in_addr_union *exposed) {
+ ExposePort *p;
+ int r, af = AF_INET;
+
+ assert(exposed);
+
+ if (!arg_expose_ports)
+ return 0;
+
+ if (in_addr_is_null(af, exposed))
+ return 0;
+
+ log_debug("Lost IP address.");
+
+ LIST_FOREACH(ports, p, arg_expose_ports) {
+ r = fw_add_local_dnat(false,
+ af,
+ p->protocol,
+ NULL,
+ NULL, 0,
+ NULL, 0,
+ p->host_port,
+ exposed,
+ p->container_port,
+ NULL);
+ if (r < 0)
+ log_warning_errno(r, "Failed to modify firewall: %m");
+ }
+
+ *exposed = IN_ADDR_NULL;
+ return 0;
+}
+
+static int expose_ports(sd_rtnl *rtnl, union in_addr_union *exposed) {
+ _cleanup_free_ struct local_address *addresses = NULL;
+ _cleanup_free_ char *pretty = NULL;
+ union in_addr_union new_exposed;
+ ExposePort *p;
+ bool add;
+ int af = AF_INET, r;
+
+ assert(exposed);
+
+ /* Invoked each time an address is added or removed inside the
+ * container */
+
+ if (!arg_expose_ports)
+ return 0;
+
+ r = local_addresses(rtnl, 0, af, &addresses);
+ if (r < 0)
+ return log_error_errno(r, "Failed to enumerate local addresses: %m");
+
+ add = r > 0 &&
+ addresses[0].family == af &&
+ addresses[0].scope < RT_SCOPE_LINK;
+
+ if (!add)
+ return flush_ports(exposed);
+
+ new_exposed = addresses[0].address;
+ if (in_addr_equal(af, exposed, &new_exposed))
+ return 0;
+
+ in_addr_to_string(af, &new_exposed, &pretty);
+ log_debug("New container IP is %s.", strna(pretty));
+
+ LIST_FOREACH(ports, p, arg_expose_ports) {
+
+ r = fw_add_local_dnat(true,
+ af,
+ p->protocol,
+ NULL,
+ NULL, 0,
+ NULL, 0,
+ p->host_port,
+ &new_exposed,
+ p->container_port,
+ in_addr_is_null(af, exposed) ? NULL : exposed);
+ if (r < 0)
+ log_warning_errno(r, "Failed to modify firewall: %m");
+ }
+
+ *exposed = new_exposed;
+ return 0;
+}
+
+static int on_address_change(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ union in_addr_union *exposed = userdata;
+
+ assert(rtnl);
+ assert(m);
+ assert(exposed);
+
+ expose_ports(rtnl, exposed);
+ return 0;
+}
+
+static int watch_rtnl(sd_event *event, int recv_fd, union in_addr_union *exposed, sd_rtnl **ret) {
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(int))];
+ } control = {};
+ struct msghdr mh = {
+ .msg_control = &control,
+ .msg_controllen = sizeof(control),
+ };
+ struct cmsghdr *cmsg;
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ int fd, r;
+ ssize_t k;
+
+ assert(event);
+ assert(recv_fd >= 0);
+ assert(ret);
+
+ if (!arg_expose_ports)
+ return 0;
+
+ k = recvmsg(recv_fd, &mh, MSG_NOSIGNAL);
+ if (k < 0)
+ return log_error_errno(errno, "Failed to recv netlink fd: %m");
+
+ cmsg = CMSG_FIRSTHDR(&mh);
+ assert(cmsg->cmsg_level == SOL_SOCKET);
+ assert(cmsg->cmsg_type == SCM_RIGHTS);
+ assert(cmsg->cmsg_len = CMSG_LEN(sizeof(int)));
+ memcpy(&fd, CMSG_DATA(cmsg), sizeof(int));
+
+ r = sd_rtnl_open_fd(&rtnl, fd, 1, RTNLGRP_IPV4_IFADDR);
+ if (r < 0) {
+ safe_close(fd);
+ return log_error_errno(r, "Failed to create rtnl object: %m");
+ }
+
+ r = sd_rtnl_add_match(rtnl, RTM_NEWADDR, on_address_change, exposed);
+ if (r < 0)
+ return log_error_errno(r, "Failed to subscribe to RTM_NEWADDR messages: %m");
+
+ r = sd_rtnl_add_match(rtnl, RTM_DELADDR, on_address_change, exposed);
+ if (r < 0)
+ return log_error_errno(r, "Failed to subscribe to RTM_DELADDR messages: %m");
+
+ r = sd_rtnl_attach_event(rtnl, event, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add to even loop: %m");
+
+ *ret = rtnl;
+ rtnl = NULL;
+
+ return 0;
+}
+
static int setup_hostname(void) {
if (arg_share_system)
char *id;
int r;
+ /* Don't link journals in ephemeral mode */
+ if (arg_ephemeral)
+ return 0;
+
p = strappend(directory, "/etc/machine-id");
if (!p)
return log_oom();
"Host and machine ids are equal (%s): refusing to link journals", id);
if (arg_link_journal == LINK_AUTO)
return 0;
- return
- -EEXIST;
+ return -EEXIST;
}
if (arg_link_journal == LINK_NO)
}
+static int setup_propagate(const char *root) {
+ const char *p, *q;
+
+ (void) mkdir_p("/run/systemd/nspawn/", 0755);
+ (void) mkdir_p("/run/systemd/nspawn/propagate", 0600);
+ p = strappenda("/run/systemd/nspawn/propagate/", arg_machine);
+ (void) mkdir_p(p, 0600);
+
+ q = strappenda(root, "/run/systemd/nspawn/incoming");
+ mkdir_parents(q, 0755);
+ mkdir_p(q, 0600);
+
+ if (mount(p, q, NULL, MS_BIND, NULL) < 0)
+ return log_error_errno(errno, "Failed to install propagation bind mount.");
+
+ if (mount(NULL, q, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY, NULL) < 0)
+ return log_error_errno(errno, "Failed to make propagation mount read-only");
+
+ return 0;
+}
+
static int setup_image(char **device_path, int *loop_nr) {
struct loop_info64 info = {
.lo_flags = LO_FLAGS_AUTOCLEAR|LO_FLAGS_PARTSCAN
}
static int determine_names(void) {
+ int r;
if (!arg_image && !arg_directory) {
- if (arg_machine)
- arg_directory = strappend("/var/lib/container/", arg_machine);
- else
+ if (arg_machine) {
+ _cleanup_(image_unrefp) Image *i = NULL;
+
+ r = image_find(arg_machine, &i);
+ if (r < 0)
+ return log_error_errno(r, "Failed to find image for machine '%s': %m", arg_machine);
+ else if (r == 0) {
+ log_error("No image for machine '%s': %m", arg_machine);
+ return -ENOENT;
+ }
+
+ if (i->type == IMAGE_GPT)
+ r = set_sanitized_path(&arg_image, i->path);
+ else
+ r = set_sanitized_path(&arg_directory, i->path);
+ if (r < 0)
+ return log_error_errno(r, "Invalid image directory: %m");
+
+ arg_read_only = arg_read_only || i->read_only;
+ } else
arg_directory = get_current_dir_name();
- if (!arg_directory) {
- log_error("Failed to determine path, please use -D.");
+ if (!arg_directory && !arg_machine) {
+ log_error("Failed to determine path, please use -D or -i.");
return -EINVAL;
}
}
if (!arg_machine) {
- arg_machine = strdup(basename(arg_image ?: arg_directory));
+ if (arg_directory && path_equal(arg_directory, "/"))
+ arg_machine = gethostname_malloc();
+ else
+ arg_machine = strdup(basename(arg_image ?: arg_directory));
+
if (!arg_machine)
return log_oom();
log_error("Failed to determine machine name automatically, please use -M.");
return -EINVAL;
}
+
+ if (arg_ephemeral) {
+ char *b;
+
+ /* Add a random suffix when this is an
+ * ephemeral machine, so that we can run many
+ * instances at once without manually having
+ * to specify -M each time. */
+
+ if (asprintf(&b, "%s-%016" PRIx64, arg_machine, random_u64()) < 0)
+ return log_oom();
+
+ free(arg_machine);
+ arg_machine = b;
+ }
}
return 0;
int main(int argc, char *argv[]) {
- _cleanup_free_ char *device_path = NULL, *root_device = NULL, *home_device = NULL, *srv_device = NULL;
+ _cleanup_free_ char *device_path = NULL, *root_device = NULL, *home_device = NULL, *srv_device = NULL, *console = NULL;
bool root_device_rw = true, home_device_rw = true, srv_device_rw = true;
_cleanup_close_ int master = -1, image_fd = -1;
- _cleanup_close_pair_ int kmsg_socket_pair[2] = { -1, -1 };
_cleanup_fdset_free_ FDSet *fds = NULL;
int r, n_fd_passed, loop_nr = -1;
- const char *console = NULL;
char veth_name[IFNAMSIZ];
bool secondary = false, remove_subvol = false;
sigset_t mask, mask_chld;
pid_t pid = 0;
int ret = EXIT_SUCCESS;
+ union in_addr_union exposed = {};
log_parse_environment();
log_open();
if (arg_directory) {
assert(!arg_image);
- if (path_equal(arg_directory, "/")) {
- log_error("Spawning container on root directory not supported.");
+ if (path_equal(arg_directory, "/") && !arg_ephemeral) {
+ log_error("Spawning container on root directory is not supported. Consider using --ephemeral.");
r = -EINVAL;
goto finish;
}
} else if (arg_ephemeral) {
char *np;
- r = tempfn_random(arg_directory, &np);
+ /* If the specified path is a mount point we
+ * generate the new snapshot immediately
+ * inside it under a random name. However if
+ * the specified is not a mount point we
+ * create the new snapshot in the parent
+ * directory, just next to it. */
+ r = path_is_mount_point(arg_directory, false);
+ if (r < 0) {
+ log_error_errno(r, "Failed to determine whether directory %s is mount point: %m", arg_directory);
+ goto finish;
+ }
+ if (r > 0)
+ r = tempfn_random_child(arg_directory, &np);
+ else
+ r = tempfn_random(arg_directory, &np);
if (r < 0) {
log_error_errno(r, "Failed to generate name for snapshot: %m");
goto finish;
goto finish;
}
- console = ptsname(master);
- if (!console) {
- r = log_error_errno(errno, "Failed to determine tty name: %m");
+ r = ptsname_malloc(master, &console);
+ if (r < 0) {
+ r = log_error_errno(r, "Failed to determine tty name: %m");
goto finish;
}
goto finish;
}
- if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, kmsg_socket_pair) < 0) {
- r = log_error_errno(errno, "Failed to create kmsg socket pair: %m");
- goto finish;
- }
-
- sd_notify(false,
- "READY=1\n"
- "STATUS=Container running.");
-
assert_se(sigemptyset(&mask) == 0);
sigset_add_many(&mask, SIGCHLD, SIGWINCH, SIGTERM, SIGINT, -1);
assert_se(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);
assert_se(sigaddset(&mask_chld, SIGCHLD) == 0);
for (;;) {
+ _cleanup_close_pair_ int kmsg_socket_pair[2] = { -1, -1 }, rtnl_socket_pair[2] = { -1, -1 };
ContainerStatus container_status;
_cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL;
struct sigaction sa = {
goto finish;
}
+ if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, kmsg_socket_pair) < 0) {
+ r = log_error_errno(errno, "Failed to create kmsg socket pair: %m");
+ goto finish;
+ }
+
+ if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, rtnl_socket_pair) < 0) {
+ r = log_error_errno(errno, "Failed to create rtnl socket pair: %m");
+ goto finish;
+ }
+
/* Child can be killed before execv(), so handle SIGCHLD
* in order to interrupt parent's blocking calls and
* give it a chance to call wait() and terminate. */
goto finish;
}
- pid = syscall(__NR_clone, SIGCHLD|CLONE_NEWNS|
- (arg_share_system ? 0 : CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWUTS)|
- (arg_private_network ? CLONE_NEWNET : 0), NULL);
+ pid = raw_clone(SIGCHLD|CLONE_NEWNS|
+ (arg_share_system ? 0 : CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWUTS)|
+ (arg_private_network ? CLONE_NEWNET : 0), NULL);
if (pid < 0) {
if (errno == EINVAL)
r = log_error_errno(errno, "clone() failed, do you have namespace support enabled in your kernel? (You need UTS, IPC, PID and NET namespacing built in): %m");
close_nointr(STDERR_FILENO);
kmsg_socket_pair[0] = safe_close(kmsg_socket_pair[0]);
+ rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]);
reset_all_signal_handlers();
reset_signal_mask();
dev_setup(arg_directory);
+ if (setup_propagate(arg_directory) < 0)
+ _exit(EXIT_FAILURE);
+
if (setup_seccomp() < 0)
_exit(EXIT_FAILURE);
if (setup_kmsg(arg_directory, kmsg_socket_pair[1]) < 0)
_exit(EXIT_FAILURE);
-
kmsg_socket_pair[1] = safe_close(kmsg_socket_pair[1]);
+ if (send_rtnl(rtnl_socket_pair[1]) < 0)
+ _exit(EXIT_FAILURE);
+ rtnl_socket_pair[1] = safe_close(rtnl_socket_pair[1]);
+
+ /* Tell the parent that we are ready, and that
+ * it can cgroupify us to that we lack access
+ * to certain devices and resources. */
+ (void) barrier_place(&barrier);
+
if (setup_boot_id(arg_directory) < 0)
_exit(EXIT_FAILURE);
if (mount_tmpfs(arg_directory) < 0)
_exit(EXIT_FAILURE);
- /* Tell the parent that we are ready, and that
- * it can cgroupify us to that we lack access
- * to certain devices and resources. */
- (void)barrier_place(&barrier);
+ /* Wait until we are cgroup-ified, so that we
+ * can mount the right cgroup path writable */
+ (void) barrier_sync_next(&barrier);
+
+ if (mount_cgroup(arg_directory) < 0)
+ _exit(EXIT_FAILURE);
if (chdir(arg_directory) < 0) {
log_error_errno(errno, "chdir(%s) failed: %m", arg_directory);
fdset_free(fds);
fds = NULL;
- /* wait for child-setup to be done */
- if (barrier_place_and_sync(&barrier)) {
- _cleanup_event_unref_ sd_event *event = NULL;
- _cleanup_(pty_forward_freep) PTYForward *forward = NULL;
+ kmsg_socket_pair[1] = safe_close(kmsg_socket_pair[1]);
+ rtnl_socket_pair[1] = safe_close(rtnl_socket_pair[1]);
+
+ /* Wait for the most basic Child-setup to be done,
+ * before we add hardware to it, and place it in a
+ * cgroup. */
+ if (barrier_sync_next(&barrier)) {
int ifi = 0;
r = move_network_interfaces(pid);
/* Notify the child that the parent is ready with all
* its setup, and that the child can now hand over
* control to the code to run inside the container. */
- (void)barrier_place(&barrier);
+ (void) barrier_place(&barrier);
- r = sd_event_new(&event);
- if (r < 0) {
- log_error_errno(r, "Failed to get default event source: %m");
- goto finish;
- }
+ /* And wait that the child is completely ready now. */
+ if (barrier_place_and_sync(&barrier)) {
+ _cleanup_event_unref_ sd_event *event = NULL;
+ _cleanup_(pty_forward_freep) PTYForward *forward = NULL;
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ char last_char = 0;
- if (arg_boot) {
- /* Try to kill the init system on SIGINT or SIGTERM */
- sd_event_add_signal(event, NULL, SIGINT, on_orderly_shutdown, UINT32_TO_PTR(pid));
- sd_event_add_signal(event, NULL, SIGTERM, on_orderly_shutdown, UINT32_TO_PTR(pid));
- } else {
- /* Immediately exit */
- sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
- sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
- }
+ sd_notify(false,
+ "READY=1\n"
+ "STATUS=Container running.");
- /* simply exit on sigchld */
- sd_event_add_signal(event, NULL, SIGCHLD, NULL, NULL);
+ r = sd_event_new(&event);
+ if (r < 0) {
+ log_error_errno(r, "Failed to get default event source: %m");
+ goto finish;
+ }
- r = pty_forward_new(event, master, &forward);
- if (r < 0) {
- log_error_errno(r, "Failed to create PTY forwarder: %m");
- goto finish;
- }
+ if (arg_boot) {
+ /* Try to kill the init system on SIGINT or SIGTERM */
+ sd_event_add_signal(event, NULL, SIGINT, on_orderly_shutdown, UINT32_TO_PTR(pid));
+ sd_event_add_signal(event, NULL, SIGTERM, on_orderly_shutdown, UINT32_TO_PTR(pid));
+ } else {
+ /* Immediately exit */
+ sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
+ sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
+ }
- r = sd_event_loop(event);
- if (r < 0) {
- log_error_errno(r, "Failed to run event loop: %m");
- goto finish;
- }
+ /* simply exit on sigchld */
+ sd_event_add_signal(event, NULL, SIGCHLD, NULL, NULL);
+
+ if (arg_expose_ports) {
+ r = watch_rtnl(event, rtnl_socket_pair[0], &exposed, &rtnl);
+ if (r < 0)
+ goto finish;
+
+ (void) expose_ports(rtnl, &exposed);
+ }
+
+ rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]);
+
+ r = pty_forward_new(event, master, true, &forward);
+ if (r < 0) {
+ log_error_errno(r, "Failed to create PTY forwarder: %m");
+ goto finish;
+ }
+
+ r = sd_event_loop(event);
+ if (r < 0) {
+ log_error_errno(r, "Failed to run event loop: %m");
+ goto finish;
+ }
+
+ pty_forward_get_last_char(forward, &last_char);
- forward = pty_forward_free(forward);
+ forward = pty_forward_free(forward);
- if (!arg_quiet)
- putc('\n', stdout);
+ if (!arg_quiet && last_char != '\n')
+ putc('\n', stdout);
- /* Kill if it is not dead yet anyway */
- terminate_machine(pid);
+ /* Kill if it is not dead yet anyway */
+ terminate_machine(pid);
+ }
}
/* Normally redundant, but better safe than sorry */
r = 0;
break;
}
+
+ flush_ports(&exposed);
}
finish:
log_warning_errno(k, "Cannot remove subvolume '%s', ignoring: %m", arg_directory);
}
+ if (arg_machine) {
+ const char *p;
+
+ p = strappenda("/run/systemd/nspawn/propagate", arg_machine);
+ (void) rm_rf(p, false, true, false);
+ }
+
free(arg_directory);
free(arg_template);
free(arg_image);
strv_free(arg_bind_ro);
strv_free(arg_tmpfs);
+ flush_ports(&exposed);
+
+ while (arg_expose_ports) {
+ ExposePort *p = arg_expose_ports;
+ LIST_REMOVE(ports, arg_expose_ports, p);
+ free(p);
+ }
+
return r < 0 ? EXIT_FAILURE : ret;
}
~ianmdlvl / elogind.git / blobdiff