| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| #include <sys/poll.h> |
| #include <sys/reboot.h> |
| #include <sys/ioctl.h> |
| #include <linux/kd.h> |
| #include <termios.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <dirent.h> |
| #include <sys/timerfd.h> |
| |
| #ifdef HAVE_AUDIT |
| #include <libaudit.h> |
| #endif |
| |
| #include "sd-daemon.h" |
| #include "sd-id128.h" |
| #include "sd-messages.h" |
| |
| #include "manager.h" |
| #include "transaction.h" |
| #include "hashmap.h" |
| #include "macro.h" |
| #include "strv.h" |
| #include "log.h" |
| #include "util.h" |
| #include "mkdir.h" |
| #include "ratelimit.h" |
| #include "locale-setup.h" |
| #include "mount-setup.h" |
| #include "unit-name.h" |
| #include "missing.h" |
| #include "path-lookup.h" |
| #include "special.h" |
| #include "exit-status.h" |
| #include "virt.h" |
| #include "watchdog.h" |
| #include "cgroup-util.h" |
| #include "path-util.h" |
| #include "audit-fd.h" |
| #include "boot-timestamps.h" |
| #include "env-util.h" |
| #include "bus-errors.h" |
| #include "bus-error.h" |
| #include "bus-util.h" |
| #include "dbus.h" |
| #include "dbus-unit.h" |
| #include "dbus-job.h" |
| #include "dbus-manager.h" |
| #include "bus-kernel.h" |
| |
| /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */ |
| #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC) |
| |
| /* Initial delay and the interval for printing status messages about running jobs */ |
| #define JOBS_IN_PROGRESS_WAIT_USEC (5*USEC_PER_SEC) |
| #define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3) |
| #define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3 |
| |
| #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) |
| |
| static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
| static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
| static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
| static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
| static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata); |
| static int manager_dispatch_run_queue(sd_event_source *source, void *userdata); |
| |
| static int manager_watch_jobs_in_progress(Manager *m) { |
| usec_t next; |
| |
| assert(m); |
| |
| if (m->jobs_in_progress_event_source) |
| return 0; |
| |
| next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC; |
| return sd_event_add_time( |
| m->event, |
| &m->jobs_in_progress_event_source, |
| CLOCK_MONOTONIC, |
| next, 0, |
| manager_dispatch_jobs_in_progress, m); |
| } |
| |
| #define CYLON_BUFFER_EXTRA (2*(sizeof(ANSI_RED_ON)-1) + sizeof(ANSI_HIGHLIGHT_RED_ON)-1 + 2*(sizeof(ANSI_HIGHLIGHT_OFF)-1)) |
| |
| static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) { |
| char *p = buffer; |
| |
| assert(buflen >= CYLON_BUFFER_EXTRA + width + 1); |
| assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */ |
| |
| if (pos > 1) { |
| if (pos > 2) |
| p = mempset(p, ' ', pos-2); |
| p = stpcpy(p, ANSI_RED_ON); |
| *p++ = '*'; |
| } |
| |
| if (pos > 0 && pos <= width) { |
| p = stpcpy(p, ANSI_HIGHLIGHT_RED_ON); |
| *p++ = '*'; |
| } |
| |
| p = stpcpy(p, ANSI_HIGHLIGHT_OFF); |
| |
| if (pos < width) { |
| p = stpcpy(p, ANSI_RED_ON); |
| *p++ = '*'; |
| if (pos < width-1) |
| p = mempset(p, ' ', width-1-pos); |
| strcpy(p, ANSI_HIGHLIGHT_OFF); |
| } |
| } |
| |
| void manager_flip_auto_status(Manager *m, bool enable) { |
| assert(m); |
| |
| if (enable) { |
| if (m->show_status == SHOW_STATUS_AUTO) |
| manager_set_show_status(m, SHOW_STATUS_TEMPORARY); |
| } else { |
| if (m->show_status == SHOW_STATUS_TEMPORARY) |
| manager_set_show_status(m, SHOW_STATUS_AUTO); |
| } |
| } |
| |
| static void manager_print_jobs_in_progress(Manager *m) { |
| _cleanup_free_ char *job_of_n = NULL; |
| Iterator i; |
| Job *j; |
| unsigned counter = 0, print_nr; |
| char cylon[6 + CYLON_BUFFER_EXTRA + 1]; |
| unsigned cylon_pos; |
| char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit"; |
| uint64_t x; |
| |
| assert(m); |
| |
| manager_flip_auto_status(m, true); |
| |
| print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs; |
| |
| HASHMAP_FOREACH(j, m->jobs, i) |
| if (j->state == JOB_RUNNING && counter++ == print_nr) |
| break; |
| |
| /* m->n_running_jobs must be consistent with the contents of m->jobs, |
| * so the above loop must have succeeded in finding j. */ |
| assert(counter == print_nr + 1); |
| assert(j); |
| |
| cylon_pos = m->jobs_in_progress_iteration % 14; |
| if (cylon_pos >= 8) |
| cylon_pos = 14 - cylon_pos; |
| draw_cylon(cylon, sizeof(cylon), 6, cylon_pos); |
| |
| m->jobs_in_progress_iteration++; |
| |
| if (m->n_running_jobs > 1) |
| if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0) |
| job_of_n = NULL; |
| |
| format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC); |
| if (job_get_timeout(j, &x) > 0) |
| format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC); |
| |
| manager_status_printf(m, true, cylon, |
| "%sA %s job is running for %s (%s / %s)", |
| strempty(job_of_n), |
| job_type_to_string(j->type), |
| unit_description(j->unit), |
| time, limit); |
| |
| } |
| |
| static int manager_watch_idle_pipe(Manager *m) { |
| int r; |
| |
| assert(m); |
| |
| if (m->idle_pipe_event_source) |
| return 0; |
| |
| if (m->idle_pipe[2] < 0) |
| return 0; |
| |
| r = sd_event_add_io(m->event, &m->idle_pipe_event_source, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m); |
| if (r < 0) { |
| log_error("Failed to watch idle pipe: %s", strerror(-r)); |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static void manager_close_idle_pipe(Manager *m) { |
| assert(m); |
| |
| safe_close_pair(m->idle_pipe); |
| safe_close_pair(m->idle_pipe + 2); |
| } |
| |
| static int manager_setup_time_change(Manager *m) { |
| int r; |
| |
| /* We only care for the cancellation event, hence we set the |
| * timeout to the latest possible value. */ |
| struct itimerspec its = { |
| .it_value.tv_sec = TIME_T_MAX, |
| }; |
| |
| assert(m); |
| assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX)); |
| |
| /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever |
| * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */ |
| |
| m->time_change_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC); |
| if (m->time_change_fd < 0) { |
| log_error("Failed to create timerfd: %m"); |
| return -errno; |
| } |
| |
| if (timerfd_settime(m->time_change_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) { |
| log_debug("Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m"); |
| m->time_change_fd = safe_close(m->time_change_fd); |
| return 0; |
| } |
| |
| r = sd_event_add_io(m->event, &m->time_change_event_source, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m); |
| if (r < 0) { |
| log_error("Failed to create time change event source: %s", strerror(-r)); |
| return r; |
| } |
| |
| log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd."); |
| |
| return 0; |
| } |
| |
| static int enable_special_signals(Manager *m) { |
| _cleanup_close_ int fd = -1; |
| |
| assert(m); |
| |
| /* Enable that we get SIGINT on control-alt-del. In containers |
| * this will fail with EPERM (older) or EINVAL (newer), so |
| * ignore that. */ |
| if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM && errno != EINVAL) |
| log_warning("Failed to enable ctrl-alt-del handling: %m"); |
| |
| fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
| if (fd < 0) { |
| /* Support systems without virtual console */ |
| if (fd != -ENOENT) |
| log_warning("Failed to open /dev/tty0: %m"); |
| } else { |
| /* Enable that we get SIGWINCH on kbrequest */ |
| if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0) |
| log_warning("Failed to enable kbrequest handling: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int manager_setup_signals(Manager *m) { |
| struct sigaction sa = { |
| .sa_handler = SIG_DFL, |
| .sa_flags = SA_NOCLDSTOP|SA_RESTART, |
| }; |
| sigset_t mask; |
| int r; |
| |
| assert(m); |
| |
| /* We are not interested in SIGSTOP and friends. */ |
| assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); |
| |
| assert_se(sigemptyset(&mask) == 0); |
| |
| sigset_add_many(&mask, |
| SIGCHLD, /* Child died */ |
| SIGTERM, /* Reexecute daemon */ |
| SIGHUP, /* Reload configuration */ |
| SIGUSR1, /* systemd/upstart: reconnect to D-Bus */ |
| SIGUSR2, /* systemd: dump status */ |
| SIGINT, /* Kernel sends us this on control-alt-del */ |
| SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */ |
| SIGPWR, /* Some kernel drivers and upsd send us this on power failure */ |
| SIGRTMIN+0, /* systemd: start default.target */ |
| SIGRTMIN+1, /* systemd: isolate rescue.target */ |
| SIGRTMIN+2, /* systemd: isolate emergency.target */ |
| SIGRTMIN+3, /* systemd: start halt.target */ |
| SIGRTMIN+4, /* systemd: start poweroff.target */ |
| SIGRTMIN+5, /* systemd: start reboot.target */ |
| SIGRTMIN+6, /* systemd: start kexec.target */ |
| SIGRTMIN+13, /* systemd: Immediate halt */ |
| SIGRTMIN+14, /* systemd: Immediate poweroff */ |
| SIGRTMIN+15, /* systemd: Immediate reboot */ |
| SIGRTMIN+16, /* systemd: Immediate kexec */ |
| SIGRTMIN+20, /* systemd: enable status messages */ |
| SIGRTMIN+21, /* systemd: disable status messages */ |
| SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */ |
| SIGRTMIN+23, /* systemd: set log level to LOG_INFO */ |
| SIGRTMIN+24, /* systemd: Immediate exit (--user only) */ |
| SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */ |
| SIGRTMIN+27, /* systemd: set log target to console */ |
| SIGRTMIN+28, /* systemd: set log target to kmsg */ |
| SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */ |
| -1); |
| assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); |
| |
| m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); |
| if (m->signal_fd < 0) |
| return -errno; |
| |
| r = sd_event_add_io(m->event, &m->signal_event_source, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m); |
| if (r < 0) |
| return r; |
| |
| /* Process signals a bit earlier than the rest of things, but |
| * later that notify_fd processing, so that the notify |
| * processing can still figure out to which process/service a |
| * message belongs, before we reap the process. */ |
| r = sd_event_source_set_priority(m->signal_event_source, -5); |
| if (r < 0) |
| return r; |
| |
| if (m->running_as == SYSTEMD_SYSTEM) |
| return enable_special_signals(m); |
| |
| return 0; |
| } |
| |
| static void manager_clean_environment(Manager *m) { |
| assert(m); |
| |
| /* Let's remove some environment variables that we |
| * need ourselves to communicate with our clients */ |
| strv_env_unset_many( |
| m->environment, |
| "NOTIFY_SOCKET", |
| "MAINPID", |
| "MANAGERPID", |
| "LISTEN_PID", |
| "LISTEN_FDS", |
| "WATCHDOG_PID", |
| "WATCHDOG_USEC", |
| NULL); |
| } |
| |
| static int manager_default_environment(Manager *m) { |
| assert(m); |
| |
| if (m->running_as == SYSTEMD_SYSTEM) { |
| /* The system manager always starts with a clean |
| * environment for its children. It does not import |
| * the kernel or the parents exported variables. |
| * |
| * The initial passed environ is untouched to keep |
| * /proc/self/environ valid; it is used for tagging |
| * the init process inside containers. */ |
| m->environment = strv_new("PATH=" DEFAULT_PATH, |
| NULL); |
| |
| /* Import locale variables LC_*= from configuration */ |
| locale_setup(&m->environment); |
| } else { |
| /* The user manager passes its own environment |
| * along to its children. */ |
| m->environment = strv_copy(environ); |
| } |
| |
| if (!m->environment) |
| return -ENOMEM; |
| |
| manager_clean_environment(m); |
| strv_sort(m->environment); |
| |
| return 0; |
| } |
| |
| int manager_new(SystemdRunningAs running_as, Manager **_m) { |
| Manager *m; |
| int r; |
| |
| assert(_m); |
| assert(running_as >= 0); |
| assert(running_as < _SYSTEMD_RUNNING_AS_MAX); |
| |
| m = new0(Manager, 1); |
| if (!m) |
| return -ENOMEM; |
| |
| #ifdef ENABLE_EFI |
| if (running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0) |
| boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp); |
| #endif |
| |
| m->running_as = running_as; |
| m->exit_code = _MANAGER_EXIT_CODE_INVALID; |
| m->default_timer_accuracy_usec = USEC_PER_MINUTE; |
| |
| m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1; |
| |
| m->pin_cgroupfs_fd = m->notify_fd = m->signal_fd = m->time_change_fd = m->dev_autofs_fd = m->private_listen_fd = m->kdbus_fd = -1; |
| m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */ |
| |
| r = manager_default_environment(m); |
| if (r < 0) |
| goto fail; |
| |
| r = hashmap_ensure_allocated(&m->units, string_hash_func, string_compare_func); |
| if (r < 0) |
| goto fail; |
| |
| r = hashmap_ensure_allocated(&m->jobs, trivial_hash_func, trivial_compare_func); |
| if (r < 0) |
| goto fail; |
| |
| r = hashmap_ensure_allocated(&m->cgroup_unit, string_hash_func, string_compare_func); |
| if (r < 0) |
| goto fail; |
| |
| r = hashmap_ensure_allocated(&m->watch_bus, string_hash_func, string_compare_func); |
| if (r < 0) |
| goto fail; |
| |
| r = set_ensure_allocated(&m->startup_units, trivial_hash_func, trivial_compare_func); |
| if (r < 0) |
| goto fail; |
| |
| r = set_ensure_allocated(&m->failed_units, trivial_hash_func, trivial_compare_func); |
| if (r < 0) |
| goto fail; |
| |
| r = sd_event_default(&m->event); |
| if (r < 0) |
| goto fail; |
| |
| r = sd_event_add_defer(m->event, &m->run_queue_event_source, manager_dispatch_run_queue, m); |
| if (r < 0) |
| goto fail; |
| |
| r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE); |
| if (r < 0) |
| goto fail; |
| |
| r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF); |
| if (r < 0) |
| goto fail; |
| |
| r = manager_setup_signals(m); |
| if (r < 0) |
| goto fail; |
| |
| r = manager_setup_cgroup(m); |
| if (r < 0) |
| goto fail; |
| |
| r = manager_setup_time_change(m); |
| if (r < 0) |
| goto fail; |
| |
| m->udev = udev_new(); |
| if (!m->udev) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| |
| /* Note that we set up neither kdbus, nor the notify fd |
| * here. We do that after deserialization, since they might |
| * have gotten serialized across the reexec. */ |
| |
| m->taint_usr = dir_is_empty("/usr") > 0; |
| |
| *_m = m; |
| return 0; |
| |
| fail: |
| manager_free(m); |
| return r; |
| } |
| |
| static int manager_setup_notify(Manager *m) { |
| int r; |
| |
| if (m->notify_fd < 0) { |
| _cleanup_close_ int fd = -1; |
| union { |
| struct sockaddr sa; |
| struct sockaddr_un un; |
| } sa = { |
| .sa.sa_family = AF_UNIX, |
| }; |
| int one = 1; |
| |
| /* First free all secondary fields */ |
| free(m->notify_socket); |
| m->notify_socket = NULL; |
| m->notify_event_source = sd_event_source_unref(m->notify_event_source); |
| |
| fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
| if (fd < 0) { |
| log_error("Failed to allocate notification socket: %m"); |
| return -errno; |
| } |
| |
| if (m->running_as == SYSTEMD_SYSTEM) |
| m->notify_socket = strdup("/run/systemd/notify"); |
| else { |
| const char *e; |
| |
| e = getenv("XDG_RUNTIME_DIR"); |
| if (!e) { |
| log_error("XDG_RUNTIME_DIR is not set: %m"); |
| return -EINVAL; |
| } |
| |
| m->notify_socket = strappend(e, "/systemd/notify"); |
| } |
| if (!m->notify_socket) |
| return log_oom(); |
| |
| strncpy(sa.un.sun_path, m->notify_socket, sizeof(sa.un.sun_path)-1); |
| r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); |
| if (r < 0) { |
| log_error("bind() failed: %m"); |
| return -errno; |
| } |
| |
| r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); |
| if (r < 0) { |
| log_error("SO_PASSCRED failed: %m"); |
| return -errno; |
| } |
| |
| m->notify_fd = fd; |
| fd = -1; |
| |
| log_debug("Using notification socket %s", m->notify_socket); |
| } |
| |
| if (!m->notify_event_source) { |
| r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m); |
| if (r < 0) { |
| log_error("Failed to allocate notify event source: %s", strerror(-r)); |
| return -errno; |
| } |
| |
| /* Process signals a bit earlier than SIGCHLD, so that we can |
| * still identify to which service an exit message belongs */ |
| r = sd_event_source_set_priority(m->notify_event_source, -7); |
| if (r < 0) { |
| log_error("Failed to set priority of notify event source: %s", strerror(-r)); |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int manager_setup_kdbus(Manager *m) { |
| #ifdef ENABLE_KDBUS |
| _cleanup_free_ char *p = NULL; |
| #endif |
| |
| #ifdef ENABLE_KDBUS |
| assert(m); |
| |
| if (m->kdbus_fd >= 0) |
| return 0; |
| |
| m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", m->running_as == SYSTEMD_SYSTEM, &p); |
| if (m->kdbus_fd < 0) { |
| log_debug("Failed to set up kdbus: %s", strerror(-m->kdbus_fd)); |
| return m->kdbus_fd; |
| } |
| |
| log_debug("Successfully set up kdbus on %s", p); |
| |
| /* Create the namespace directory here, so that the contents |
| * of that directory is not visible to non-root users. This is |
| * necessary to ensure that users cannot get access to busses |
| * of virtualized users when no UID namespacing is used. */ |
| if (m->running_as == SYSTEMD_SYSTEM) |
| mkdir_p_label("/dev/kdbus/domain", 0700); |
| #endif |
| |
| return 0; |
| } |
| |
| static int manager_connect_bus(Manager *m, bool reexecuting) { |
| bool try_bus_connect; |
| |
| assert(m); |
| |
| try_bus_connect = |
| m->kdbus_fd >= 0 || |
| reexecuting || |
| (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS")); |
| |
| /* Try to connect to the busses, if possible. */ |
| return bus_init(m, try_bus_connect); |
| } |
| |
| static unsigned manager_dispatch_cleanup_queue(Manager *m) { |
| Unit *u; |
| unsigned n = 0; |
| |
| assert(m); |
| |
| while ((u = m->cleanup_queue)) { |
| assert(u->in_cleanup_queue); |
| |
| unit_free(u); |
| n++; |
| } |
| |
| return n; |
| } |
| |
| enum { |
| GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */ |
| GC_OFFSET_UNSURE, /* No clue */ |
| GC_OFFSET_GOOD, /* We still need this unit */ |
| GC_OFFSET_BAD, /* We don't need this unit anymore */ |
| _GC_OFFSET_MAX |
| }; |
| |
| static void unit_gc_sweep(Unit *u, unsigned gc_marker) { |
| Iterator i; |
| Unit *other; |
| bool is_bad; |
| |
| assert(u); |
| |
| if (u->gc_marker == gc_marker + GC_OFFSET_GOOD || |
| u->gc_marker == gc_marker + GC_OFFSET_BAD || |
| u->gc_marker == gc_marker + GC_OFFSET_IN_PATH) |
| return; |
| |
| if (u->in_cleanup_queue) |
| goto bad; |
| |
| if (unit_check_gc(u)) |
| goto good; |
| |
| u->gc_marker = gc_marker + GC_OFFSET_IN_PATH; |
| |
| is_bad = true; |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) { |
| unit_gc_sweep(other, gc_marker); |
| |
| if (other->gc_marker == gc_marker + GC_OFFSET_GOOD) |
| goto good; |
| |
| if (other->gc_marker != gc_marker + GC_OFFSET_BAD) |
| is_bad = false; |
| } |
| |
| if (is_bad) |
| goto bad; |
| |
| /* We were unable to find anything out about this entry, so |
| * let's investigate it later */ |
| u->gc_marker = gc_marker + GC_OFFSET_UNSURE; |
| unit_add_to_gc_queue(u); |
| return; |
| |
| bad: |
| /* We definitely know that this one is not useful anymore, so |
| * let's mark it for deletion */ |
| u->gc_marker = gc_marker + GC_OFFSET_BAD; |
| unit_add_to_cleanup_queue(u); |
| return; |
| |
| good: |
| u->gc_marker = gc_marker + GC_OFFSET_GOOD; |
| } |
| |
| static unsigned manager_dispatch_gc_queue(Manager *m) { |
| Unit *u; |
| unsigned n = 0; |
| unsigned gc_marker; |
| |
| assert(m); |
| |
| /* log_debug("Running GC..."); */ |
| |
| m->gc_marker += _GC_OFFSET_MAX; |
| if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX) |
| m->gc_marker = 1; |
| |
| gc_marker = m->gc_marker; |
| |
| while ((u = m->gc_queue)) { |
| assert(u->in_gc_queue); |
| |
| unit_gc_sweep(u, gc_marker); |
| |
| LIST_REMOVE(gc_queue, m->gc_queue, u); |
| u->in_gc_queue = false; |
| |
| n++; |
| |
| if (u->gc_marker == gc_marker + GC_OFFSET_BAD || |
| u->gc_marker == gc_marker + GC_OFFSET_UNSURE) { |
| log_debug_unit(u->id, "Collecting %s", u->id); |
| u->gc_marker = gc_marker + GC_OFFSET_BAD; |
| unit_add_to_cleanup_queue(u); |
| } |
| } |
| |
| m->n_in_gc_queue = 0; |
| |
| return n; |
| } |
| |
| static void manager_clear_jobs_and_units(Manager *m) { |
| Unit *u; |
| |
| assert(m); |
| |
| while ((u = hashmap_first(m->units))) |
| unit_free(u); |
| |
| manager_dispatch_cleanup_queue(m); |
| |
| assert(!m->load_queue); |
| assert(!m->run_queue); |
| assert(!m->dbus_unit_queue); |
| assert(!m->dbus_job_queue); |
| assert(!m->cleanup_queue); |
| assert(!m->gc_queue); |
| |
| assert(hashmap_isempty(m->jobs)); |
| assert(hashmap_isempty(m->units)); |
| |
| m->n_on_console = 0; |
| m->n_running_jobs = 0; |
| } |
| |
| void manager_free(Manager *m) { |
| UnitType c; |
| int i; |
| |
| assert(m); |
| |
| manager_clear_jobs_and_units(m); |
| |
| for (c = 0; c < _UNIT_TYPE_MAX; c++) |
| if (unit_vtable[c]->shutdown) |
| unit_vtable[c]->shutdown(m); |
| |
| /* If we reexecute ourselves, we keep the root cgroup |
| * around */ |
| manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE); |
| |
| manager_undo_generators(m); |
| |
| bus_done(m); |
| |
| hashmap_free(m->units); |
| hashmap_free(m->jobs); |
| hashmap_free(m->watch_pids1); |
| hashmap_free(m->watch_pids2); |
| hashmap_free(m->watch_bus); |
| |
| set_free(m->startup_units); |
| set_free(m->failed_units); |
| |
| sd_event_source_unref(m->signal_event_source); |
| sd_event_source_unref(m->notify_event_source); |
| sd_event_source_unref(m->time_change_event_source); |
| sd_event_source_unref(m->jobs_in_progress_event_source); |
| sd_event_source_unref(m->idle_pipe_event_source); |
| sd_event_source_unref(m->run_queue_event_source); |
| |
| safe_close(m->signal_fd); |
| safe_close(m->notify_fd); |
| safe_close(m->time_change_fd); |
| safe_close(m->kdbus_fd); |
| |
| manager_close_idle_pipe(m); |
| |
| udev_unref(m->udev); |
| sd_event_unref(m->event); |
| |
| free(m->notify_socket); |
| |
| lookup_paths_free(&m->lookup_paths); |
| strv_free(m->environment); |
| |
| hashmap_free(m->cgroup_unit); |
| set_free_free(m->unit_path_cache); |
| |
| free(m->switch_root); |
| free(m->switch_root_init); |
| |
| for (i = 0; i < _RLIMIT_MAX; i++) |
| free(m->rlimit[i]); |
| |
| assert(hashmap_isempty(m->units_requiring_mounts_for)); |
| hashmap_free(m->units_requiring_mounts_for); |
| |
| free(m); |
| } |
| |
| int manager_enumerate(Manager *m) { |
| int r = 0, q; |
| UnitType c; |
| |
| assert(m); |
| |
| /* Let's ask every type to load all units from disk/kernel |
| * that it might know */ |
| for (c = 0; c < _UNIT_TYPE_MAX; c++) |
| if (unit_vtable[c]->enumerate) { |
| q = unit_vtable[c]->enumerate(m); |
| if (q < 0) |
| r = q; |
| } |
| |
| manager_dispatch_load_queue(m); |
| return r; |
| } |
| |
| static int manager_coldplug(Manager *m) { |
| int r = 0; |
| Iterator i; |
| Unit *u; |
| char *k; |
| |
| assert(m); |
| |
| /* Then, let's set up their initial state. */ |
| HASHMAP_FOREACH_KEY(u, k, m->units, i) { |
| int q; |
| |
| /* ignore aliases */ |
| if (u->id != k) |
| continue; |
| |
| q = unit_coldplug(u); |
| if (q < 0) |
| r = q; |
| } |
| |
| return r; |
| } |
| |
| static void manager_build_unit_path_cache(Manager *m) { |
| char **i; |
| _cleanup_free_ DIR *d = NULL; |
| int r; |
| |
| assert(m); |
| |
| set_free_free(m->unit_path_cache); |
| |
| m->unit_path_cache = set_new(string_hash_func, string_compare_func); |
| if (!m->unit_path_cache) { |
| log_error("Failed to allocate unit path cache."); |
| return; |
| } |
| |
| /* This simply builds a list of files we know exist, so that |
| * we don't always have to go to disk */ |
| |
| STRV_FOREACH(i, m->lookup_paths.unit_path) { |
| struct dirent *de; |
| |
| d = opendir(*i); |
| if (!d) { |
| if (errno != ENOENT) |
| log_error("Failed to open directory %s: %m", *i); |
| continue; |
| } |
| |
| while ((de = readdir(d))) { |
| char *p; |
| |
| if (ignore_file(de->d_name)) |
| continue; |
| |
| p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL); |
| if (!p) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| |
| r = set_consume(m->unit_path_cache, p); |
| if (r < 0) |
| goto fail; |
| } |
| |
| closedir(d); |
| d = NULL; |
| } |
| |
| return; |
| |
| fail: |
| log_error("Failed to build unit path cache: %s", strerror(-r)); |
| |
| set_free_free(m->unit_path_cache); |
| m->unit_path_cache = NULL; |
| } |
| |
| |
| static int manager_distribute_fds(Manager *m, FDSet *fds) { |
| Unit *u; |
| Iterator i; |
| int r; |
| |
| assert(m); |
| |
| HASHMAP_FOREACH(u, m->units, i) { |
| |
| if (fdset_size(fds) <= 0) |
| break; |
| |
| if (UNIT_VTABLE(u)->distribute_fds) { |
| r = UNIT_VTABLE(u)->distribute_fds(u, fds); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int manager_startup(Manager *m, FILE *serialization, FDSet *fds) { |
| int r, q; |
| |
| assert(m); |
| |
| dual_timestamp_get(&m->generators_start_timestamp); |
| manager_run_generators(m); |
| dual_timestamp_get(&m->generators_finish_timestamp); |
| |
| r = lookup_paths_init( |
| &m->lookup_paths, m->running_as, true, |
| NULL, |
| m->generator_unit_path, |
| m->generator_unit_path_early, |
| m->generator_unit_path_late); |
| if (r < 0) |
| return r; |
| |
| manager_build_unit_path_cache(m); |
| |
| /* If we will deserialize make sure that during enumeration |
| * this is already known, so we increase the counter here |
| * already */ |
| if (serialization) |
| m->n_reloading ++; |
| |
| /* First, enumerate what we can from all config files */ |
| dual_timestamp_get(&m->units_load_start_timestamp); |
| r = manager_enumerate(m); |
| dual_timestamp_get(&m->units_load_finish_timestamp); |
| |
| /* Second, deserialize if there is something to deserialize */ |
| if (serialization) { |
| q = manager_deserialize(m, serialization, fds); |
| if (q < 0) |
| r = q; |
| } |
| |
| /* Any fds left? Find some unit which wants them. This is |
| * useful to allow container managers to pass some file |
| * descriptors to us pre-initialized. This enables |
| * socket-based activation of entire containers. */ |
| if (fdset_size(fds) > 0) { |
| q = manager_distribute_fds(m, fds); |
| if (q < 0) |
| r = q; |
| } |
| |
| /* We might have deserialized the notify fd, but if we didn't |
| * then let's create the bus now */ |
| manager_setup_notify(m); |
| |
| /* We might have deserialized the kdbus control fd, but if we |
| * didn't, then let's create the bus now. */ |
| manager_setup_kdbus(m); |
| manager_connect_bus(m, !!serialization); |
| bus_track_coldplug(m, &m->subscribed, &m->deserialized_subscribed); |
| |
| /* Third, fire things up! */ |
| q = manager_coldplug(m); |
| if (q < 0) |
| r = q; |
| |
| if (serialization) { |
| assert(m->n_reloading > 0); |
| m->n_reloading --; |
| |
| /* Let's wait for the UnitNew/JobNew messages being |
| * sent, before we notify that the reload is |
| * finished */ |
| m->send_reloading_done = true; |
| } |
| |
| return r; |
| } |
| |
| int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, sd_bus_error *e, Job **_ret) { |
| int r; |
| Transaction *tr; |
| |
| assert(m); |
| assert(type < _JOB_TYPE_MAX); |
| assert(unit); |
| assert(mode < _JOB_MODE_MAX); |
| |
| if (mode == JOB_ISOLATE && type != JOB_START) { |
| sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start."); |
| return -EINVAL; |
| } |
| |
| if (mode == JOB_ISOLATE && !unit->allow_isolate) { |
| sd_bus_error_setf(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated."); |
| return -EPERM; |
| } |
| |
| log_debug_unit(unit->id, |
| "Trying to enqueue job %s/%s/%s", unit->id, |
| job_type_to_string(type), job_mode_to_string(mode)); |
| |
| job_type_collapse(&type, unit); |
| |
| tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY); |
| if (!tr) |
| return -ENOMEM; |
| |
| r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false, |
| mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS, |
| mode == JOB_IGNORE_DEPENDENCIES, e); |
| if (r < 0) |
| goto tr_abort; |
| |
| if (mode == JOB_ISOLATE) { |
| r = transaction_add_isolate_jobs(tr, m); |
| if (r < 0) |
| goto tr_abort; |
| } |
| |
| r = transaction_activate(tr, m, mode, e); |
| if (r < 0) |
| goto tr_abort; |
| |
| log_debug_unit(unit->id, |
| "Enqueued job %s/%s as %u", unit->id, |
| job_type_to_string(type), (unsigned) tr->anchor_job->id); |
| |
| if (_ret) |
| *_ret = tr->anchor_job; |
| |
| transaction_free(tr); |
| return 0; |
| |
| tr_abort: |
| transaction_abort(tr); |
| transaction_free(tr); |
| return r; |
| } |
| |
| int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, sd_bus_error *e, Job **_ret) { |
| Unit *unit; |
| int r; |
| |
| assert(m); |
| assert(type < _JOB_TYPE_MAX); |
| assert(name); |
| assert(mode < _JOB_MODE_MAX); |
| |
| r = manager_load_unit(m, name, NULL, NULL, &unit); |
| if (r < 0) |
| return r; |
| |
| return manager_add_job(m, type, unit, mode, override, e, _ret); |
| } |
| |
| Job *manager_get_job(Manager *m, uint32_t id) { |
| assert(m); |
| |
| return hashmap_get(m->jobs, UINT32_TO_PTR(id)); |
| } |
| |
| Unit *manager_get_unit(Manager *m, const char *name) { |
| assert(m); |
| assert(name); |
| |
| return hashmap_get(m->units, name); |
| } |
| |
| unsigned manager_dispatch_load_queue(Manager *m) { |
| Unit *u; |
| unsigned n = 0; |
| |
| assert(m); |
| |
| /* Make sure we are not run recursively */ |
| if (m->dispatching_load_queue) |
| return 0; |
| |
| m->dispatching_load_queue = true; |
| |
| /* Dispatches the load queue. Takes a unit from the queue and |
| * tries to load its data until the queue is empty */ |
| |
| while ((u = m->load_queue)) { |
| assert(u->in_load_queue); |
| |
| unit_load(u); |
| n++; |
| } |
| |
| m->dispatching_load_queue = false; |
| return n; |
| } |
| |
| int manager_load_unit_prepare( |
| Manager *m, |
| const char *name, |
| const char *path, |
| sd_bus_error *e, |
| Unit **_ret) { |
| |
| Unit *ret; |
| UnitType t; |
| int r; |
| |
| assert(m); |
| assert(name || path); |
| |
| /* This will prepare the unit for loading, but not actually |
| * load anything from disk. */ |
| |
| if (path && !is_path(path)) |
| return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path); |
| |
| if (!name) |
| name = basename(path); |
| |
| t = unit_name_to_type(name); |
| |
| if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, TEMPLATE_INVALID)) |
| return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name); |
| |
| ret = manager_get_unit(m, name); |
| if (ret) { |
| *_ret = ret; |
| return 1; |
| } |
| |
| ret = unit_new(m, unit_vtable[t]->object_size); |
| if (!ret) |
| return -ENOMEM; |
| |
| if (path) { |
| ret->fragment_path = strdup(path); |
| if (!ret->fragment_path) { |
| unit_free(ret); |
| return -ENOMEM; |
| } |
| } |
| |
| r = unit_add_name(ret, name); |
| if (r < 0) { |
| unit_free(ret); |
| return r; |
| } |
| |
| unit_add_to_load_queue(ret); |
| unit_add_to_dbus_queue(ret); |
| unit_add_to_gc_queue(ret); |
| |
| if (_ret) |
| *_ret = ret; |
| |
| return 0; |
| } |
| |
| int manager_load_unit( |
| Manager *m, |
| const char *name, |
| const char *path, |
| sd_bus_error *e, |
| Unit **_ret) { |
| |
| int r; |
| |
| assert(m); |
| |
| /* This will load the service information files, but not actually |
| * start any services or anything. */ |
| |
| r = manager_load_unit_prepare(m, name, path, e, _ret); |
| if (r != 0) |
| return r; |
| |
| manager_dispatch_load_queue(m); |
| |
| if (_ret) |
| *_ret = unit_follow_merge(*_ret); |
| |
| return 0; |
| } |
| |
| void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) { |
| Iterator i; |
| Job *j; |
| |
| assert(s); |
| assert(f); |
| |
| HASHMAP_FOREACH(j, s->jobs, i) |
| job_dump(j, f, prefix); |
| } |
| |
| void manager_dump_units(Manager *s, FILE *f, const char *prefix) { |
| Iterator i; |
| Unit *u; |
| const char *t; |
| |
| assert(s); |
| assert(f); |
| |
| HASHMAP_FOREACH_KEY(u, t, s->units, i) |
| if (u->id == t) |
| unit_dump(u, f, prefix); |
| } |
| |
| void manager_clear_jobs(Manager *m) { |
| Job *j; |
| |
| assert(m); |
| |
| while ((j = hashmap_first(m->jobs))) |
| /* No need to recurse. We're cancelling all jobs. */ |
| job_finish_and_invalidate(j, JOB_CANCELED, false); |
| } |
| |
| static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) { |
| Manager *m = userdata; |
| Job *j; |
| |
| assert(source); |
| assert(m); |
| |
| while ((j = m->run_queue)) { |
| assert(j->installed); |
| assert(j->in_run_queue); |
| |
| job_run_and_invalidate(j); |
| } |
| |
| if (m->n_running_jobs > 0) |
| manager_watch_jobs_in_progress(m); |
| |
| if (m->n_on_console > 0) |
| manager_watch_idle_pipe(m); |
| |
| return 1; |
| } |
| |
| static unsigned manager_dispatch_dbus_queue(Manager *m) { |
| Job *j; |
| Unit *u; |
| unsigned n = 0; |
| |
| assert(m); |
| |
| if (m->dispatching_dbus_queue) |
| return 0; |
| |
| m->dispatching_dbus_queue = true; |
| |
| while ((u = m->dbus_unit_queue)) { |
| assert(u->in_dbus_queue); |
| |
| bus_unit_send_change_signal(u); |
| n++; |
| } |
| |
| while ((j = m->dbus_job_queue)) { |
| assert(j->in_dbus_queue); |
| |
| bus_job_send_change_signal(j); |
| n++; |
| } |
| |
| m->dispatching_dbus_queue = false; |
| |
| if (m->send_reloading_done) { |
| m->send_reloading_done = false; |
| |
| bus_manager_send_reloading(m, false); |
| } |
| |
| if (m->queued_message) |
| bus_send_queued_message(m); |
| |
| return n; |
| } |
| |
| static void manager_invoke_notify_message(Manager *m, Unit *u, pid_t pid, char *buf, size_t n) { |
| _cleanup_strv_free_ char **tags = NULL; |
| |
| assert(m); |
| assert(u); |
| assert(buf); |
| assert(n > 0); |
| |
| tags = strv_split(buf, "\n\r"); |
| if (!tags) { |
| log_oom(); |
| return; |
| } |
| |
| log_debug_unit(u->id, "Got notification message for unit %s", u->id); |
| |
| if (UNIT_VTABLE(u)->notify_message) |
| UNIT_VTABLE(u)->notify_message(u, pid, tags); |
| } |
| |
| static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
| Manager *m = userdata; |
| ssize_t n; |
| |
| assert(m); |
| assert(m->notify_fd == fd); |
| |
| if (revents != EPOLLIN) { |
| log_warning("Got unexpected poll event for notify fd."); |
| return 0; |
| } |
| |
| for (;;) { |
| char buf[4096]; |
| struct iovec iovec = { |
| .iov_base = buf, |
| .iov_len = sizeof(buf)-1, |
| }; |
| bool found = false; |
| |
| union { |
| struct cmsghdr cmsghdr; |
| uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; |
| } control = {}; |
| |
| struct msghdr msghdr = { |
| .msg_iov = &iovec, |
| .msg_iovlen = 1, |
| .msg_control = &control, |
| .msg_controllen = sizeof(control), |
| }; |
| struct ucred *ucred; |
| Unit *u; |
| |
| n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT); |
| if (n <= 0) { |
| if (n == 0) |
| return -EIO; |
| |
| if (errno == EAGAIN || errno == EINTR) |
| break; |
| |
| return -errno; |
| } |
| |
| if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) || |
| control.cmsghdr.cmsg_level != SOL_SOCKET || |
| control.cmsghdr.cmsg_type != SCM_CREDENTIALS || |
| control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) { |
| log_warning("Received notify message without credentials. Ignoring."); |
| continue; |
| } |
| |
| ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr); |
| |
| assert((size_t) n < sizeof(buf)); |
| buf[n] = 0; |
| |
| u = manager_get_unit_by_pid(m, ucred->pid); |
| if (u) { |
| manager_invoke_notify_message(m, u, ucred->pid, buf, n); |
| found = true; |
| } |
| |
| u = hashmap_get(m->watch_pids1, LONG_TO_PTR(ucred->pid)); |
| if (u) { |
| manager_invoke_notify_message(m, u, ucred->pid, buf, n); |
| found = true; |
| } |
| |
| u = hashmap_get(m->watch_pids2, LONG_TO_PTR(ucred->pid)); |
| if (u) { |
| manager_invoke_notify_message(m, u, ucred->pid, buf, n); |
| found = true; |
| } |
| |
| if (!found) |
| log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid); |
| } |
| |
| return 0; |
| } |
| |
| static void invoke_sigchld_event(Manager *m, Unit *u, siginfo_t *si) { |
| assert(m); |
| assert(u); |
| assert(si); |
| |
| log_debug_unit(u->id, "Child "PID_FMT" belongs to %s", si->si_pid, u->id); |
| |
| unit_unwatch_pid(u, si->si_pid); |
| UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status); |
| } |
| |
| static int manager_dispatch_sigchld(Manager *m) { |
| assert(m); |
| |
| for (;;) { |
| siginfo_t si = {}; |
| |
| /* First we call waitd() for a PID and do not reap the |
| * zombie. That way we can still access /proc/$PID for |
| * it while it is a zombie. */ |
| if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) { |
| |
| if (errno == ECHILD) |
| break; |
| |
| if (errno == EINTR) |
| continue; |
| |
| return -errno; |
| } |
| |
| if (si.si_pid <= 0) |
| break; |
| |
| if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) { |
| _cleanup_free_ char *name = NULL; |
| Unit *u; |
| |
| get_process_comm(si.si_pid, &name); |
| |
| log_debug("Child "PID_FMT" (%s) died (code=%s, status=%i/%s)", |
| si.si_pid, strna(name), |
| sigchld_code_to_string(si.si_code), |
| si.si_status, |
| strna(si.si_code == CLD_EXITED |
| ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL) |
| : signal_to_string(si.si_status))); |
| |
| /* And now figure out the unit this belongs |
| * to, it might be multiple... */ |
| u = manager_get_unit_by_pid(m, si.si_pid); |
| if (u) |
| invoke_sigchld_event(m, u, &si); |
| u = hashmap_get(m->watch_pids1, LONG_TO_PTR(si.si_pid)); |
| if (u) |
| invoke_sigchld_event(m, u, &si); |
| u = hashmap_get(m->watch_pids2, LONG_TO_PTR(si.si_pid)); |
| if (u) |
| invoke_sigchld_event(m, u, &si); |
| } |
| |
| /* And now, we actually reap the zombie. */ |
| if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) { |
| if (errno == EINTR) |
| continue; |
| |
| return -errno; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int manager_start_target(Manager *m, const char *name, JobMode mode) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| int r; |
| |
| log_debug_unit(name, "Activating special unit %s", name); |
| |
| r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL); |
| if (r < 0) |
| log_error_unit(name, "Failed to enqueue %s job: %s", name, bus_error_message(&error, r)); |
| |
| return r; |
| } |
| |
| static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
| Manager *m = userdata; |
| ssize_t n; |
| struct signalfd_siginfo sfsi; |
| bool sigchld = false; |
| |
| assert(m); |
| assert(m->signal_fd == fd); |
| |
| if (revents != EPOLLIN) { |
| log_warning("Got unexpected events from signal file descriptor."); |
| return 0; |
| } |
| |
| for (;;) { |
| n = read(m->signal_fd, &sfsi, sizeof(sfsi)); |
| if (n != sizeof(sfsi)) { |
| |
| if (n >= 0) |
| return -EIO; |
| |
| if (errno == EINTR || errno == EAGAIN) |
| break; |
| |
| return -errno; |
| } |
| |
| log_received_signal(sfsi.ssi_signo == SIGCHLD || |
| (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER) |
| ? LOG_DEBUG : LOG_INFO, |
| &sfsi); |
| |
| switch (sfsi.ssi_signo) { |
| |
| case SIGCHLD: |
| sigchld = true; |
| break; |
| |
| case SIGTERM: |
| if (m->running_as == SYSTEMD_SYSTEM) { |
| /* This is for compatibility with the |
| * original sysvinit */ |
| m->exit_code = MANAGER_REEXECUTE; |
| break; |
| } |
| |
| /* Fall through */ |
| |
| case SIGINT: |
| if (m->running_as == SYSTEMD_SYSTEM) { |
| manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY); |
| break; |
| } |
| |
| /* Run the exit target if there is one, if not, just exit. */ |
| if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) { |
| m->exit_code = MANAGER_EXIT; |
| return 0; |
| } |
| |
| break; |
| |
| case SIGWINCH: |
| if (m->running_as == SYSTEMD_SYSTEM) |
| manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE); |
| |
| /* This is a nop on non-init */ |
| break; |
| |
| case SIGPWR: |
| if (m->running_as == SYSTEMD_SYSTEM) |
| manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE); |
| |
| /* This is a nop on non-init */ |
| break; |
| |
| case SIGUSR1: { |
| Unit *u; |
| |
| u = manager_get_unit(m, SPECIAL_DBUS_SERVICE); |
| |
| if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) { |
| log_info("Trying to reconnect to bus..."); |
| bus_init(m, true); |
| } |
| |
| if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) { |
| log_info("Loading D-Bus service..."); |
| manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE); |
| } |
| |
| break; |
| } |
| |
| case SIGUSR2: { |
| _cleanup_free_ char *dump = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| size_t size; |
| |
| f = open_memstream(&dump, &size); |
| if (!f) { |
| log_warning("Failed to allocate memory stream."); |
| break; |
| } |
| |
| manager_dump_units(m, f, "\t"); |
| manager_dump_jobs(m, f, "\t"); |
| |
| if (ferror(f)) { |
| log_warning("Failed to write status stream"); |
| break; |
| } |
| |
| if (fflush(f)) { |
| log_warning("Failed to flush status stream"); |
| break; |
| } |
| |
| log_dump(LOG_INFO, dump); |
| break; |
| } |
| |
| case SIGHUP: |
| m->exit_code = MANAGER_RELOAD; |
| break; |
| |
| default: { |
| |
| /* Starting SIGRTMIN+0 */ |
| static const char * const target_table[] = { |
| [0] = SPECIAL_DEFAULT_TARGET, |
| [1] = SPECIAL_RESCUE_TARGET, |
| [2] = SPECIAL_EMERGENCY_TARGET, |
| [3] = SPECIAL_HALT_TARGET, |
| [4] = SPECIAL_POWEROFF_TARGET, |
| [5] = SPECIAL_REBOOT_TARGET, |
| [6] = SPECIAL_KEXEC_TARGET |
| }; |
| |
| /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */ |
| static const ManagerExitCode code_table[] = { |
| [0] = MANAGER_HALT, |
| [1] = MANAGER_POWEROFF, |
| [2] = MANAGER_REBOOT, |
| [3] = MANAGER_KEXEC |
| }; |
| |
| if ((int) sfsi.ssi_signo >= SIGRTMIN+0 && |
| (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) { |
| int idx = (int) sfsi.ssi_signo - SIGRTMIN; |
| manager_start_target(m, target_table[idx], |
| (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE); |
| break; |
| } |
| |
| if ((int) sfsi.ssi_signo >= SIGRTMIN+13 && |
| (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) { |
| m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13]; |
| break; |
| } |
| |
| switch (sfsi.ssi_signo - SIGRTMIN) { |
| |
| case 20: |
| log_debug("Enabling showing of status."); |
| manager_set_show_status(m, SHOW_STATUS_YES); |
| break; |
| |
| case 21: |
| log_debug("Disabling showing of status."); |
| manager_set_show_status(m, SHOW_STATUS_NO); |
| break; |
| |
| case 22: |
| log_set_max_level(LOG_DEBUG); |
| log_notice("Setting log level to debug."); |
| break; |
| |
| case 23: |
| log_set_max_level(LOG_INFO); |
| log_notice("Setting log level to info."); |
| break; |
| |
| case 24: |
| if (m->running_as == SYSTEMD_USER) { |
| m->exit_code = MANAGER_EXIT; |
| return 0; |
| } |
| |
| /* This is a nop on init */ |
| break; |
| |
| case 26: |
| log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); |
| log_notice("Setting log target to journal-or-kmsg."); |
| break; |
| |
| case 27: |
| log_set_target(LOG_TARGET_CONSOLE); |
| log_notice("Setting log target to console."); |
| break; |
| |
| case 28: |
| log_set_target(LOG_TARGET_KMSG); |
| log_notice("Setting log target to kmsg."); |
| break; |
| |
| case 29: |
| log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); |
| log_notice("Setting log target to syslog-or-kmsg."); |
| break; |
| |
| default: |
| log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo)); |
| } |
| } |
| } |
| } |
| |
| if (sigchld) |
| manager_dispatch_sigchld(m); |
| |
| return 0; |
| } |
| |
| static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
| Manager *m = userdata; |
| Iterator i; |
| Unit *u; |
| |
| assert(m); |
| assert(m->time_change_fd == fd); |
| |
| log_struct(LOG_INFO, |
| MESSAGE_ID(SD_MESSAGE_TIME_CHANGE), |
| "MESSAGE=Time has been changed", |
| NULL); |
| |
| /* Restart the watch */ |
| m->time_change_event_source = sd_event_source_unref(m->time_change_event_source); |
| m->time_change_fd = safe_close(m->time_change_fd); |
| |
| manager_setup_time_change(m); |
| |
| HASHMAP_FOREACH(u, m->units, i) |
| if (UNIT_VTABLE(u)->time_change) |
| UNIT_VTABLE(u)->time_change(u); |
| |
| return 0; |
| } |
| |
| static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
| Manager *m = userdata; |
| |
| assert(m); |
| assert(m->idle_pipe[2] == fd); |
| |
| m->no_console_output = m->n_on_console > 0; |
| |
| m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source); |
| manager_close_idle_pipe(m); |
| |
| return 0; |
| } |
| |
| static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata) { |
| Manager *m = userdata; |
| int r; |
| uint64_t next; |
| |
| assert(m); |
| assert(source); |
| |
| manager_print_jobs_in_progress(m); |
| |
| next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_PERIOD_USEC; |
| r = sd_event_source_set_time(source, next); |
| if (r < 0) |
| return r; |
| |
| return sd_event_source_set_enabled(source, SD_EVENT_ONESHOT); |
| } |
| |
| int manager_loop(Manager *m) { |
| int r; |
| |
| RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000); |
| |
| assert(m); |
| m->exit_code = MANAGER_OK; |
| |
| /* Release the path cache */ |
| set_free_free(m->unit_path_cache); |
| m->unit_path_cache = NULL; |
| |
| manager_check_finished(m); |
| |
| /* There might still be some zombies hanging around from |
| * before we were exec()'ed. Let's reap them. */ |
| r = manager_dispatch_sigchld(m); |
| if (r < 0) |
| return r; |
| |
| while (m->exit_code == MANAGER_OK) { |
| usec_t wait_usec; |
| |
| if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM) |
| watchdog_ping(); |
| |
| if (!ratelimit_test(&rl)) { |
| /* Yay, something is going seriously wrong, pause a little */ |
| log_warning("Looping too fast. Throttling execution a little."); |
| sleep(1); |
| continue; |
| } |
| |
| if (manager_dispatch_load_queue(m) > 0) |
| continue; |
| |
| if (manager_dispatch_gc_queue(m) > 0) |
| continue; |
| |
| if (manager_dispatch_cleanup_queue(m) > 0) |
| continue; |
| |
| if (manager_dispatch_cgroup_queue(m) > 0) |
| continue; |
| |
| if (manager_dispatch_dbus_queue(m) > 0) |
| continue; |
| |
| /* Sleep for half the watchdog time */ |
| if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM) { |
| wait_usec = m->runtime_watchdog / 2; |
| if (wait_usec <= 0) |
| wait_usec = 1; |
| } else |
| wait_usec = (usec_t) -1; |
| |
| r = sd_event_run(m->event, wait_usec); |
| if (r < 0) { |
| log_error("Failed to run event loop: %s", strerror(-r)); |
| return r; |
| } |
| } |
| |
| return m->exit_code; |
| } |
| |
| int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) { |
| _cleanup_free_ char *n = NULL; |
| Unit *u; |
| int r; |
| |
| assert(m); |
| assert(s); |
| assert(_u); |
| |
| r = unit_name_from_dbus_path(s, &n); |
| if (r < 0) |
| return r; |
| |
| r = manager_load_unit(m, n, NULL, e, &u); |
| if (r < 0) |
| return r; |
| |
| *_u = u; |
| |
| return 0; |
| } |
| |
| int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) { |
| const char *p; |
| unsigned id; |
| Job *j; |
| int r; |
| |
| assert(m); |
| assert(s); |
| assert(_j); |
| |
| p = startswith(s, "/org/freedesktop/systemd1/job/"); |
| if (!p) |
| return -EINVAL; |
| |
| r = safe_atou(p, &id); |
| if (r < 0) |
| return r; |
| |
| j = manager_get_job(m, id); |
| if (!j) |
| return -ENOENT; |
| |
| *_j = j; |
| |
| return 0; |
| } |
| |
| void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) { |
| |
| #ifdef HAVE_AUDIT |
| _cleanup_free_ char *p = NULL; |
| int audit_fd; |
| |
| audit_fd = get_audit_fd(); |
| if (audit_fd < 0) |
| return; |
| |
| /* Don't generate audit events if the service was already |
| * started and we're just deserializing */ |
| if (m->n_reloading > 0) |
| return; |
| |
| if (m->running_as != SYSTEMD_SYSTEM) |
| return; |
| |
| if (u->type != UNIT_SERVICE) |
| return; |
| |
| p = unit_name_to_prefix_and_instance(u->id); |
| if (!p) { |
| log_error_unit(u->id, |
| "Failed to allocate unit name for audit message: %s", strerror(ENOMEM)); |
| return; |
| } |
| |
| if (audit_log_user_comm_message(audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) { |
| if (errno == EPERM) { |
| /* We aren't allowed to send audit messages? |
| * Then let's not retry again. */ |
| close_audit_fd(); |
| } else |
| log_warning("Failed to send audit message: %m"); |
| } |
| #endif |
| |
| } |
| |
| void manager_send_unit_plymouth(Manager *m, Unit *u) { |
| union sockaddr_union sa = { |
| .un.sun_family = AF_UNIX, |
| .un.sun_path = "\0/org/freedesktop/plymouthd", |
| }; |
| |
| int n = 0; |
| _cleanup_free_ char *message = NULL; |
| _cleanup_close_ int fd = -1; |
| |
| /* Don't generate plymouth events if the service was already |
| * started and we're just deserializing */ |
| if (m->n_reloading > 0) |
| return; |
| |
| if (m->running_as != SYSTEMD_SYSTEM) |
| return; |
| |
| if (detect_container(NULL) > 0) |
| return; |
| |
| if (u->type != UNIT_SERVICE && |
| u->type != UNIT_MOUNT && |
| u->type != UNIT_SWAP) |
| return; |
| |
| /* We set SOCK_NONBLOCK here so that we rather drop the |
| * message then wait for plymouth */ |
| fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
| if (fd < 0) { |
| log_error("socket() failed: %m"); |
| return; |
| } |
| |
| if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) { |
| |
| if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED)) |
| log_error("connect() failed: %m"); |
| return; |
| } |
| |
| if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) { |
| log_oom(); |
| return; |
| } |
| |
| errno = 0; |
| if (write(fd, message, n + 1) != n + 1) |
| if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED)) |
| log_error("Failed to write Plymouth message: %m"); |
| } |
| |
| void manager_dispatch_bus_name_owner_changed( |
| Manager *m, |
| const char *name, |
| const char* old_owner, |
| const char *new_owner) { |
| |
| Unit *u; |
| |
| assert(m); |
| assert(name); |
| |
| u = hashmap_get(m->watch_bus, name); |
| if (!u) |
| return; |
| |
| UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); |
| } |
| |
| int manager_open_serialization(Manager *m, FILE **_f) { |
| const char *path; |
| int fd = -1; |
| FILE *f; |
| |
| assert(_f); |
| |
| path = m->running_as == SYSTEMD_SYSTEM ? "/run/systemd" : "/tmp"; |
| fd = open_tmpfile(path, O_RDWR|O_CLOEXEC); |
| if (fd < 0) |
| return -errno; |
| |
| log_debug("Serializing state to %s", path); |
| |
| f = fdopen(fd, "w+"); |
| if (!f) { |
| safe_close(fd); |
| return -errno; |
| } |
| |
| *_f = f; |
| |
| return 0; |
| } |
| |
| int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root) { |
| Iterator i; |
| Unit *u; |
| const char *t; |
| char **e; |
| int r; |
| |
| assert(m); |
| assert(f); |
| assert(fds); |
| |
| m->n_reloading ++; |
| |
| fprintf(f, "current-job-id=%i\n", m->current_job_id); |
| fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr)); |
| fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs); |
| fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs); |
| |
| dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp); |
| dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp); |
| dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp); |
| dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp); |
| |
| if (!in_initrd()) { |
| dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp); |
| dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp); |
| dual_timestamp_serialize(f, "security-start-timestamp", &m->security_start_timestamp); |
| dual_timestamp_serialize(f, "security-finish-timestamp", &m->security_finish_timestamp); |
| dual_timestamp_serialize(f, "generators-start-timestamp", &m->generators_start_timestamp); |
| dual_timestamp_serialize(f, "generators-finish-timestamp", &m->generators_finish_timestamp); |
| dual_timestamp_serialize(f, "units-load-start-timestamp", &m->units_load_start_timestamp); |
| dual_timestamp_serialize(f, "units-load-finish-timestamp", &m->units_load_finish_timestamp); |
| } |
| |
| if (!switching_root) { |
| STRV_FOREACH(e, m->environment) { |
| _cleanup_free_ char *ce; |
| |
| ce = cescape(*e); |
| if (!ce) |
| return -ENOMEM; |
| |
| fprintf(f, "env=%s\n", *e); |
| } |
| } |
| |
| if (m->notify_fd >= 0) { |
| int copy; |
| |
| copy = fdset_put_dup(fds, m->notify_fd); |
| if (copy < 0) |
| return copy; |
| |
| fprintf(f, "notify-fd=%i\n", copy); |
| fprintf(f, "notify-socket=%s\n", m->notify_socket); |
| } |
| |
| if (m->kdbus_fd >= 0) { |
| int copy; |
| |
| copy = fdset_put_dup(fds, m->kdbus_fd); |
| if (copy < 0) |
| return copy; |
| |
| fprintf(f, "kdbus-fd=%i\n", copy); |
| } |
| |
| bus_track_serialize(m->subscribed, f); |
| |
| fputc('\n', f); |
| |
| HASHMAP_FOREACH_KEY(u, t, m->units, i) { |
| if (u->id != t) |
| continue; |
| |
| /* Start marker */ |
| fputs(u->id, f); |
| fputc('\n', f); |
| |
| r = unit_serialize(u, f, fds, !switching_root); |
| if (r < 0) { |
| m->n_reloading --; |
| return r; |
| } |
| } |
| |
| assert(m->n_reloading > 0); |
| m->n_reloading --; |
| |
| if (ferror(f)) |
| return -EIO; |
| |
| r = bus_fdset_add_all(m, fds); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int manager_deserialize(Manager *m, FILE *f, FDSet *fds) { |
| int r = 0; |
| |
| assert(m); |
| assert(f); |
| |
| log_debug("Deserializing state..."); |
| |
| m->n_reloading ++; |
| |
| for (;;) { |
| char line[LINE_MAX], *l; |
| |
| if (!fgets(line, sizeof(line), f)) { |
| if (feof(f)) |
| r = 0; |
| else |
| r = -errno; |
| |
| goto finish; |
| } |
| |
| char_array_0(line); |
| l = strstrip(line); |
| |
| if (l[0] == 0) |
| break; |
| |
| if (startswith(l, "current-job-id=")) { |
| uint32_t id; |
| |
| if (safe_atou32(l+15, &id) < 0) |
| log_debug("Failed to parse current job id value %s", l+15); |
| else |
| m->current_job_id = MAX(m->current_job_id, id); |
| |
| } else if (startswith(l, "n-installed-jobs=")) { |
| uint32_t n; |
| |
| if (safe_atou32(l+17, &n) < 0) |
| log_debug("Failed to parse installed jobs counter %s", l+17); |
| else |
| m->n_installed_jobs += n; |
| |
| } else if (startswith(l, "n-failed-jobs=")) { |
| uint32_t n; |
| |
| if (safe_atou32(l+14, &n) < 0) |
| log_debug("Failed to parse failed jobs counter %s", l+14); |
| else |
| m->n_failed_jobs += n; |
| |
| } else if (startswith(l, "taint-usr=")) { |
| int b; |
| |
| b = parse_boolean(l+10); |
| if (b < 0) |
| log_debug("Failed to parse taint /usr flag %s", l+10); |
| else |
| m->taint_usr = m->taint_usr || b; |
| |
| } else if (startswith(l, "firmware-timestamp=")) |
| dual_timestamp_deserialize(l+19, &m->firmware_timestamp); |
| else if (startswith(l, "loader-timestamp=")) |
| dual_timestamp_deserialize(l+17, &m->loader_timestamp); |
| else if (startswith(l, "kernel-timestamp=")) |
| dual_timestamp_deserialize(l+17, &m->kernel_timestamp); |
| else if (startswith(l, "initrd-timestamp=")) |
| dual_timestamp_deserialize(l+17, &m->initrd_timestamp); |
| else if (startswith(l, "userspace-timestamp=")) |
| dual_timestamp_deserialize(l+20, &m->userspace_timestamp); |
| else if (startswith(l, "finish-timestamp=")) |
| dual_timestamp_deserialize(l+17, &m->finish_timestamp); |
| else if (startswith(l, "security-start-timestamp=")) |
| dual_timestamp_deserialize(l+25, &m->security_start_timestamp); |
| else if (startswith(l, "security-finish-timestamp=")) |
| dual_timestamp_deserialize(l+26, &m->security_finish_timestamp); |
| else if (startswith(l, "generators-start-timestamp=")) |
| dual_timestamp_deserialize(l+27, &m->generators_start_timestamp); |
| else if (startswith(l, "generators-finish-timestamp=")) |
| dual_timestamp_deserialize(l+28, &m->generators_finish_timestamp); |
| else if (startswith(l, "units-load-start-timestamp=")) |
| dual_timestamp_deserialize(l+27, &m->units_load_start_timestamp); |
| else if (startswith(l, "units-load-finish-timestamp=")) |
| dual_timestamp_deserialize(l+28, &m->units_load_finish_timestamp); |
| else if (startswith(l, "env=")) { |
| _cleanup_free_ char *uce = NULL; |
| char **e; |
| |
| uce = cunescape(l+4); |
| if (!uce) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| e = strv_env_set(m->environment, uce); |
| if (!e) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| strv_free(m->environment); |
| m->environment = e; |
| |
| } else if (startswith(l, "notify-fd=")) { |
| int fd; |
| |
| if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) |
| log_debug("Failed to parse notify fd: %s", l + 10); |
| else { |
| m->notify_event_source = sd_event_source_unref(m->notify_event_source); |
| safe_close(m->notify_fd); |
| m->notify_fd = fdset_remove(fds, fd); |
| } |
| |
| } else if (startswith(l, "notify-socket=")) { |
| char *n; |
| |
| n = strdup(l+14); |
| if (!n) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| free(m->notify_socket); |
| m->notify_socket = n; |
| |
| } else if (startswith(l, "kdbus-fd=")) { |
| int fd; |
| |
| if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) |
| log_debug("Failed to parse kdbus fd: %s", l + 9); |
| else { |
| safe_close(m->kdbus_fd); |
| m->kdbus_fd = fdset_remove(fds, fd); |
| } |
| |
| } else if (bus_track_deserialize_item(&m->deserialized_subscribed, l) == 0) |
| log_debug("Unknown serialization item '%s'", l); |
| } |
| |
| for (;;) { |
| Unit *u; |
| char name[UNIT_NAME_MAX+2]; |
| |
| /* Start marker */ |
| if (!fgets(name, sizeof(name), f)) { |
| if (feof(f)) |
| r = 0; |
| else |
| r = -errno; |
| |
| goto finish; |
| } |
| |
| char_array_0(name); |
| |
| r = manager_load_unit(m, strstrip(name), NULL, NULL, &u); |
| if (r < 0) |
| goto finish; |
| |
| r = unit_deserialize(u, f, fds); |
| if (r < 0) |
| goto finish; |
| } |
| |
| finish: |
| if (ferror(f)) |
| r = -EIO; |
| |
| assert(m->n_reloading > 0); |
| m->n_reloading --; |
| |
| return r; |
| } |
| |
| int manager_reload(Manager *m) { |
| int r, q; |
| _cleanup_fclose_ FILE *f = NULL; |
| _cleanup_fdset_free_ FDSet *fds = NULL; |
| |
| assert(m); |
| |
| r = manager_open_serialization(m, &f); |
| if (r < 0) |
| return r; |
| |
| m->n_reloading ++; |
| bus_manager_send_reloading(m, true); |
| |
| fds = fdset_new(); |
| if (!fds) { |
| m->n_reloading --; |
| return -ENOMEM; |
| } |
| |
| r = manager_serialize(m, f, fds, false); |
| if (r < 0) { |
| m->n_reloading --; |
| return r; |
| } |
| |
| if (fseeko(f, 0, SEEK_SET) < 0) { |
| m->n_reloading --; |
| return -errno; |
| } |
| |
| /* From here on there is no way back. */ |
| manager_clear_jobs_and_units(m); |
| manager_undo_generators(m); |
| lookup_paths_free(&m->lookup_paths); |
| |
| /* Find new unit paths */ |
| manager_run_generators(m); |
| |
| q = lookup_paths_init( |
| &m->lookup_paths, m->running_as, true, |
| NULL, |
| m->generator_unit_path, |
| m->generator_unit_path_early, |
| m->generator_unit_path_late); |
| if (q < 0) |
| r = q; |
| |
| manager_build_unit_path_cache(m); |
| |
| /* First, enumerate what we can from all config files */ |
| q = manager_enumerate(m); |
| if (q < 0) |
| r = q; |
| |
| /* Second, deserialize our stored data */ |
| q = manager_deserialize(m, f, fds); |
| if (q < 0) |
| r = q; |
| |
| fclose(f); |
| f = NULL; |
| |
| /* Re-register notify_fd as event source */ |
| q = manager_setup_notify(m); |
| if (q < 0) |
| r = q; |
| |
| /* Third, fire things up! */ |
| q = manager_coldplug(m); |
| if (q < 0) |
| r = q; |
| |
| assert(m->n_reloading > 0); |
| m->n_reloading--; |
| |
| m->send_reloading_done = true; |
| |
| return r; |
| } |
| |
| bool manager_is_reloading_or_reexecuting(Manager *m) { |
| assert(m); |
| |
| return m->n_reloading != 0; |
| } |
| |
| void manager_reset_failed(Manager *m) { |
| Unit *u; |
| Iterator i; |
| |
| assert(m); |
| |
| HASHMAP_FOREACH(u, m->units, i) |
| unit_reset_failed(u); |
| } |
| |
| bool manager_unit_inactive_or_pending(Manager *m, const char *name) { |
| Unit *u; |
| |
| assert(m); |
| assert(name); |
| |
| /* Returns true if the unit is inactive or going down */ |
| u = manager_get_unit(m, name); |
| if (!u) |
| return true; |
| |
| return unit_inactive_or_pending(u); |
| } |
| |
| void manager_check_finished(Manager *m) { |
| char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX]; |
| usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec; |
| Unit *u = NULL; |
| Iterator i; |
| |
| assert(m); |
| |
| if (m->n_running_jobs == 0) |
| m->jobs_in_progress_event_source = sd_event_source_unref(m->jobs_in_progress_event_source); |
| |
| if (hashmap_size(m->jobs) > 0) { |
| |
| if (m->jobs_in_progress_event_source) { |
| sd_event_source_set_time(m->jobs_in_progress_event_source, |
| now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC); |
| } |
| |
| return; |
| } |
| |
| manager_flip_auto_status(m, false); |
| |
| /* Notify Type=idle units that we are done now */ |
| m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source); |
| manager_close_idle_pipe(m); |
| |
| /* Turn off confirm spawn now */ |
| m->confirm_spawn = false; |
| |
| if (dual_timestamp_is_set(&m->finish_timestamp)) |
| return; |
| |
| dual_timestamp_get(&m->finish_timestamp); |
| |
| if (m->running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0) { |
| |
| /* Note that m->kernel_usec.monotonic is always at 0, |
| * and m->firmware_usec.monotonic and |
| * m->loader_usec.monotonic should be considered |
| * negative values. */ |
| |
| firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic; |
| loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic; |
| userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic; |
| total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic; |
| |
| if (dual_timestamp_is_set(&m->initrd_timestamp)) { |
| |
| kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic; |
| initrd_usec = m->userspace_timestamp.monotonic - m->initrd_timestamp.monotonic; |
| |
| if (!log_on_console()) |
| log_struct(LOG_INFO, |
| MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED), |
| "KERNEL_USEC="USEC_FMT, kernel_usec, |
| "INITRD_USEC="USEC_FMT, initrd_usec, |
| "USERSPACE_USEC="USEC_FMT, userspace_usec, |
| "MESSAGE=Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.", |
| format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC), |
| format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC), |
| format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC), |
| format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC), |
| NULL); |
| } else { |
| kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic; |
| initrd_usec = 0; |
| |
| if (!log_on_console()) |
| log_struct(LOG_INFO, |
| MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED), |
| "KERNEL_USEC="USEC_FMT, kernel_usec, |
| "USERSPACE_USEC="USEC_FMT, userspace_usec, |
| "MESSAGE=Startup finished in %s (kernel) + %s (userspace) = %s.", |
| format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC), |
| format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC), |
| format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC), |
| NULL); |
| } |
| } else { |
| firmware_usec = loader_usec = initrd_usec = kernel_usec = 0; |
| total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic; |
| |
| if (!log_on_console()) |
| log_struct(LOG_INFO, |
| MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED), |
| "USERSPACE_USEC="USEC_FMT, userspace_usec, |
| "MESSAGE=Startup finished in %s.", |
| format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC), |
| NULL); |
| } |
| |
| SET_FOREACH(u, m->startup_units, i) |
| cgroup_context_apply(unit_get_cgroup_context(u), unit_get_cgroup_mask(u), u->cgroup_path, manager_state(m)); |
| |
| bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec); |
| |
| sd_notifyf(false, |
| "READY=1\nSTATUS=Startup finished in %s.", |
| format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)); |
| } |
| |
| static int create_generator_dir(Manager *m, char **generator, const char *name) { |
| char *p; |
| int r; |
| |
| assert(m); |
| assert(generator); |
| assert(name); |
| |
| if (*generator) |
| return 0; |
| |
| if (m->running_as == SYSTEMD_SYSTEM && getpid() == 1) { |
| /* systemd --system, not running --test */ |
| |
| p = strappend("/run/systemd/", name); |
| if (!p) |
| return log_oom(); |
| |
| r = mkdir_p_label(p, 0755); |
| if (r < 0) { |
| log_error("Failed to create generator directory %s: %s", |
| p, strerror(-r)); |
| free(p); |
| return r; |
| } |
| } else if (m->running_as == SYSTEMD_USER) { |
| const char *s = NULL; |
| |
| s = getenv("XDG_RUNTIME_DIR"); |
| if (!s) |
| return -EINVAL; |
| p = strjoin(s, "/systemd/", name, NULL); |
| if (!p) |
| return log_oom(); |
| |
| r = mkdir_p_label(p, 0755); |
| if (r < 0) { |
| log_error("Failed to create generator directory %s: %s", |
| p, strerror(-r)); |
| free(p); |
| return r; |
| } |
| } else { |
| /* systemd --system --test */ |
| |
| p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL); |
| if (!p) |
| return log_oom(); |
| |
| if (!mkdtemp(p)) { |
| log_error("Failed to create generator directory %s: %m", |
| p); |
| free(p); |
| return -errno; |
| } |
| } |
| |
| *generator = p; |
| return 0; |
| } |
| |
| static void trim_generator_dir(Manager *m, char **generator) { |
| assert(m); |
| assert(generator); |
| |
| if (!*generator) |
| return; |
| |
| if (rmdir(*generator) >= 0) { |
| free(*generator); |
| *generator = NULL; |
| } |
| |
| return; |
| } |
| |
| void manager_run_generators(Manager *m) { |
| _cleanup_closedir_ DIR *d = NULL; |
| const char *generator_path; |
| const char *argv[5]; |
| int r; |
| |
| assert(m); |
| |
| generator_path = m->running_as == SYSTEMD_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH; |
| d = opendir(generator_path); |
| if (!d) { |
| if (errno == ENOENT) |
| return; |
| |
| log_error("Failed to enumerate generator directory %s: %m", |
| generator_path); |
| return; |
| } |
| |
| r = create_generator_dir(m, &m->generator_unit_path, "generator"); |
| if (r < 0) |
| goto finish; |
| |
| r = create_generator_dir(m, &m->generator_unit_path_early, "generator.early"); |
| if (r < 0) |
| goto finish; |
| |
| r = create_generator_dir(m, &m->generator_unit_path_late, "generator.late"); |
| if (r < 0) |
| goto finish; |
| |
| argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */ |
| argv[1] = m->generator_unit_path; |
| argv[2] = m->generator_unit_path_early; |
| argv[3] = m->generator_unit_path_late; |
| argv[4] = NULL; |
| |
| RUN_WITH_UMASK(0022) |
| execute_directory(generator_path, d, DEFAULT_TIMEOUT_USEC, (char**) argv); |
| |
| finish: |
| trim_generator_dir(m, &m->generator_unit_path); |
| trim_generator_dir(m, &m->generator_unit_path_early); |
| trim_generator_dir(m, &m->generator_unit_path_late); |
| } |
| |
| static void remove_generator_dir(Manager *m, char **generator) { |
| assert(m); |
| assert(generator); |
| |
| if (!*generator) |
| return; |
| |
| strv_remove(m->lookup_paths.unit_path, *generator); |
| rm_rf(*generator, false, true, false); |
| |
| free(*generator); |
| *generator = NULL; |
| } |
| |
| void manager_undo_generators(Manager *m) { |
| assert(m); |
| |
| remove_generator_dir(m, &m->generator_unit_path); |
| remove_generator_dir(m, &m->generator_unit_path_early); |
| remove_generator_dir(m, &m->generator_unit_path_late); |
| } |
| |
| int manager_environment_add(Manager *m, char **minus, char **plus) { |
| char **a = NULL, **b = NULL, **l; |
| assert(m); |
| |
| l = m->environment; |
| |
| if (!strv_isempty(minus)) { |
| a = strv_env_delete(l, 1, minus); |
| if (!a) |
| return -ENOMEM; |
| |
| l = a; |
| } |
| |
| if (!strv_isempty(plus)) { |
| b = strv_env_merge(2, l, plus); |
| if (!b) |
| return -ENOMEM; |
| |
| l = b; |
| } |
| |
| if (m->environment != l) |
| strv_free(m->environment); |
| if (a != l) |
| strv_free(a); |
| if (b != l) |
| strv_free(b); |
| |
| m->environment = l; |
| manager_clean_environment(m); |
| strv_sort(m->environment); |
| |
| return 0; |
| } |
| |
| int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) { |
| int i; |
| |
| assert(m); |
| |
| for (i = 0; i < _RLIMIT_MAX; i++) { |
| if (!default_rlimit[i]) |
| continue; |
| |
| m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1); |
| if (!m->rlimit[i]) |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| void manager_recheck_journal(Manager *m) { |
| Unit *u; |
| |
| assert(m); |
| |
| if (m->running_as != SYSTEMD_SYSTEM) |
| return; |
| |
| u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET); |
| if (u && SOCKET(u)->state != SOCKET_RUNNING) { |
| log_close_journal(); |
| return; |
| } |
| |
| u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE); |
| if (u && SERVICE(u)->state != SERVICE_RUNNING) { |
| log_close_journal(); |
| return; |
| } |
| |
| /* Hmm, OK, so the socket is fully up and the service is up |
| * too, then let's make use of the thing. */ |
| log_open(); |
| } |
| |
| void manager_set_show_status(Manager *m, ShowStatus mode) { |
| assert(m); |
| assert(IN_SET(mode, SHOW_STATUS_AUTO, SHOW_STATUS_NO, SHOW_STATUS_YES, SHOW_STATUS_TEMPORARY)); |
| |
| if (m->running_as != SYSTEMD_SYSTEM) |
| return; |
| |
| m->show_status = mode; |
| |
| if (mode > 0) |
| touch("/run/systemd/show-status"); |
| else |
| unlink("/run/systemd/show-status"); |
| } |
| |
| static bool manager_get_show_status(Manager *m) { |
| assert(m); |
| |
| if (m->running_as != SYSTEMD_SYSTEM) |
| return false; |
| |
| if (m->no_console_output) |
| return false; |
| |
| if (!IN_SET(manager_state(m), MANAGER_STARTING, MANAGER_STOPPING)) |
| return false; |
| |
| if (m->show_status > 0) |
| return true; |
| |
| /* If Plymouth is running make sure we show the status, so |
| * that there's something nice to see when people press Esc */ |
| |
| return plymouth_running(); |
| } |
| |
| void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) { |
| va_list ap; |
| |
| if (!manager_get_show_status(m)) |
| return; |
| |
| /* XXX We should totally drop the check for ephemeral here |
| * and thus effectively make 'Type=idle' pointless. */ |
| if (ephemeral && m->n_on_console > 0) |
| return; |
| |
| va_start(ap, format); |
| status_vprintf(status, true, ephemeral, format, ap); |
| va_end(ap); |
| } |
| |
| int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found) { |
| _cleanup_free_ char *p = NULL; |
| Unit *found; |
| |
| assert(m); |
| assert(path); |
| assert(suffix); |
| assert(_found); |
| |
| p = unit_name_from_path(path, suffix); |
| if (!p) |
| return -ENOMEM; |
| |
| found = manager_get_unit(m, p); |
| if (!found) { |
| *_found = NULL; |
| return 0; |
| } |
| |
| *_found = found; |
| return 1; |
| } |
| |
| Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path) { |
| char p[strlen(path)+1]; |
| |
| assert(m); |
| assert(path); |
| |
| strcpy(p, path); |
| path_kill_slashes(p); |
| |
| return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p); |
| } |
| |
| const char *manager_get_runtime_prefix(Manager *m) { |
| assert(m); |
| |
| return m->running_as == SYSTEMD_SYSTEM ? |
| "/run" : |
| getenv("XDG_RUNTIME_DIR"); |
| } |
| |
| ManagerState manager_state(Manager *m) { |
| Unit *u; |
| |
| assert(m); |
| |
| /* Did we ever finish booting? If not then we are still starting up */ |
| if (!dual_timestamp_is_set(&m->finish_timestamp)) |
| return MANAGER_STARTING; |
| |
| /* Is the special shutdown target queued? If so, we are in shutdown state */ |
| u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET); |
| if (u && u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START)) |
| return MANAGER_STOPPING; |
| |
| /* Are the rescue or emergency targets active or queued? If so we are in maintenance state */ |
| u = manager_get_unit(m, SPECIAL_RESCUE_TARGET); |
| if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) || |
| (u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START)))) |
| return MANAGER_MAINTENANCE; |
| |
| u = manager_get_unit(m, SPECIAL_EMERGENCY_TARGET); |
| if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) || |
| (u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START)))) |
| return MANAGER_MAINTENANCE; |
| |
| /* Are there any failed units? If so, we are in degraded mode */ |
| if (set_size(m->failed_units) > 0) |
| return MANAGER_DEGRADED; |
| |
| return MANAGER_RUNNING; |
| } |
| |
| static const char *const manager_state_table[_MANAGER_STATE_MAX] = { |
| [MANAGER_STARTING] = "starting", |
| [MANAGER_RUNNING] = "running", |
| [MANAGER_DEGRADED] = "degraded", |
| [MANAGER_MAINTENANCE] = "maintenance", |
| [MANAGER_STOPPING] = "stopping", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(manager_state, ManagerState); |