44a419540e
The fact that m->show_status was serialized/deserialized made impossible any further customisation of this setting via system.conf. IOW the value was basically always locked unless it was changed via signals. This patch reworks the handling of m->show_status but also makes sure that if a new value was changed via the signal API then this value is kept and preserved accross PID1 reexecuting or reloading. Note: this effectively means that once the value is set via the signal interface, it can be changed again only through the signal API.
4920 lines
172 KiB
C
4920 lines
172 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/kd.h>
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#include <sys/epoll.h>
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#include <sys/inotify.h>
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#include <sys/ioctl.h>
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#include <sys/reboot.h>
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#include <sys/timerfd.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#if HAVE_AUDIT
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#include <libaudit.h>
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#endif
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#include "sd-daemon.h"
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#include "sd-messages.h"
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#include "sd-path.h"
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#include "all-units.h"
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#include "alloc-util.h"
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#include "audit-fd.h"
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#include "boot-timestamps.h"
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#include "bus-common-errors.h"
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#include "bus-error.h"
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#include "bus-kernel.h"
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#include "bus-util.h"
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#include "clean-ipc.h"
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#include "clock-util.h"
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#include "core-varlink.h"
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#include "dbus-job.h"
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#include "dbus-manager.h"
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#include "dbus-unit.h"
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#include "dbus.h"
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#include "def.h"
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#include "dirent-util.h"
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#include "env-util.h"
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#include "escape.h"
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#include "exec-util.h"
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#include "execute.h"
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#include "exit-status.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "fs-util.h"
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#include "generator-setup.h"
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#include "hashmap.h"
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#include "install.h"
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#include "io-util.h"
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#include "label.h"
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#include "locale-setup.h"
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#include "load-fragment.h"
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#include "log.h"
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#include "macro.h"
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#include "manager.h"
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#include "memory-util.h"
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#include "mkdir.h"
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#include "parse-util.h"
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#include "path-lookup.h"
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#include "path-util.h"
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#include "process-util.h"
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#include "ratelimit.h"
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#include "rlimit-util.h"
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#include "rm-rf.h"
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#include "serialize.h"
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#include "signal-util.h"
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#include "socket-util.h"
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#include "special.h"
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#include "stat-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#include "strxcpyx.h"
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#include "sysctl-util.h"
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#include "syslog-util.h"
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#include "terminal-util.h"
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#include "time-util.h"
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#include "transaction.h"
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#include "umask-util.h"
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#include "unit-name.h"
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#include "user-util.h"
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#include "virt.h"
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#include "watchdog.h"
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#define NOTIFY_RCVBUF_SIZE (8*1024*1024)
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#define CGROUPS_AGENT_RCVBUF_SIZE (8*1024*1024)
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/* Initial delay and the interval for printing status messages about running jobs */
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#define JOBS_IN_PROGRESS_WAIT_USEC (2*USEC_PER_SEC)
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#define JOBS_IN_PROGRESS_QUIET_WAIT_USEC (25*USEC_PER_SEC)
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#define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3)
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#define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3
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/* If there are more than 1K bus messages queue across our API and direct buses, then let's not add more on top until
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* the queue gets more empty. */
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#define MANAGER_BUS_BUSY_THRESHOLD 1024LU
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/* How many units and jobs to process of the bus queue before returning to the event loop. */
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#define MANAGER_BUS_MESSAGE_BUDGET 100U
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static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
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static int manager_dispatch_cgroups_agent_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
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static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
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static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
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static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
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static int manager_dispatch_user_lookup_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
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static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);
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static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);
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static int manager_dispatch_sigchld(sd_event_source *source, void *userdata);
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static int manager_dispatch_timezone_change(sd_event_source *source, const struct inotify_event *event, void *userdata);
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static int manager_run_environment_generators(Manager *m);
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static int manager_run_generators(Manager *m);
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static void manager_vacuum(Manager *m);
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static usec_t manager_watch_jobs_next_time(Manager *m) {
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return usec_add(now(CLOCK_MONOTONIC),
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show_status_on(m->show_status) ? JOBS_IN_PROGRESS_WAIT_USEC :
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JOBS_IN_PROGRESS_QUIET_WAIT_USEC);
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}
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static void manager_watch_jobs_in_progress(Manager *m) {
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usec_t next;
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int r;
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assert(m);
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/* We do not want to show the cylon animation if the user
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* needs to confirm service executions otherwise confirmation
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* messages will be screwed by the cylon animation. */
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if (!manager_is_confirm_spawn_disabled(m))
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return;
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if (m->jobs_in_progress_event_source)
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return;
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next = manager_watch_jobs_next_time(m);
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r = sd_event_add_time(
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m->event,
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&m->jobs_in_progress_event_source,
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CLOCK_MONOTONIC,
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next, 0,
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manager_dispatch_jobs_in_progress, m);
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if (r < 0)
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return;
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(void) sd_event_source_set_description(m->jobs_in_progress_event_source, "manager-jobs-in-progress");
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}
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#define CYLON_BUFFER_EXTRA (2*STRLEN(ANSI_RED) + STRLEN(ANSI_HIGHLIGHT_RED) + 2*STRLEN(ANSI_NORMAL))
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static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
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char *p = buffer;
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assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
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assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */
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if (pos > 1) {
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if (pos > 2)
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p = mempset(p, ' ', pos-2);
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if (log_get_show_color())
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p = stpcpy(p, ANSI_RED);
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*p++ = '*';
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}
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if (pos > 0 && pos <= width) {
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if (log_get_show_color())
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p = stpcpy(p, ANSI_HIGHLIGHT_RED);
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*p++ = '*';
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}
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if (log_get_show_color())
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p = stpcpy(p, ANSI_NORMAL);
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if (pos < width) {
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if (log_get_show_color())
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p = stpcpy(p, ANSI_RED);
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*p++ = '*';
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if (pos < width-1)
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p = mempset(p, ' ', width-1-pos);
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if (log_get_show_color())
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strcpy(p, ANSI_NORMAL);
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}
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}
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static void manager_flip_auto_status(Manager *m, bool enable, const char *reason) {
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assert(m);
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if (enable) {
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if (m->show_status == SHOW_STATUS_AUTO)
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manager_set_show_status(m, SHOW_STATUS_TEMPORARY, reason);
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} else {
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if (m->show_status == SHOW_STATUS_TEMPORARY)
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manager_set_show_status(m, SHOW_STATUS_AUTO, reason);
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}
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}
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static void manager_print_jobs_in_progress(Manager *m) {
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_cleanup_free_ char *job_of_n = NULL;
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Iterator i;
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Job *j;
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unsigned counter = 0, print_nr;
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char cylon[6 + CYLON_BUFFER_EXTRA + 1];
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unsigned cylon_pos;
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char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit";
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uint64_t x;
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assert(m);
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assert(m->n_running_jobs > 0);
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manager_flip_auto_status(m, true, "delay");
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print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;
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HASHMAP_FOREACH(j, m->jobs, i)
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if (j->state == JOB_RUNNING && counter++ == print_nr)
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break;
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/* m->n_running_jobs must be consistent with the contents of m->jobs,
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* so the above loop must have succeeded in finding j. */
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assert(counter == print_nr + 1);
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assert(j);
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cylon_pos = m->jobs_in_progress_iteration % 14;
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if (cylon_pos >= 8)
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cylon_pos = 14 - cylon_pos;
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draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);
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m->jobs_in_progress_iteration++;
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if (m->n_running_jobs > 1) {
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if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
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job_of_n = NULL;
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}
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format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
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if (job_get_timeout(j, &x) > 0)
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format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC);
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manager_status_printf(m, STATUS_TYPE_EPHEMERAL, cylon,
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"%sA %s job is running for %s (%s / %s)",
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strempty(job_of_n),
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job_type_to_string(j->type),
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unit_status_string(j->unit),
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time, limit);
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}
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static int have_ask_password(void) {
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_cleanup_closedir_ DIR *dir;
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struct dirent *de;
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dir = opendir("/run/systemd/ask-password");
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if (!dir) {
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if (errno == ENOENT)
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return false;
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else
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return -errno;
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}
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FOREACH_DIRENT_ALL(de, dir, return -errno) {
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if (startswith(de->d_name, "ask."))
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return true;
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}
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return false;
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}
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static int manager_dispatch_ask_password_fd(sd_event_source *source,
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int fd, uint32_t revents, void *userdata) {
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Manager *m = userdata;
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assert(m);
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(void) flush_fd(fd);
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m->have_ask_password = have_ask_password();
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if (m->have_ask_password < 0)
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/* Log error but continue. Negative have_ask_password
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* is treated as unknown status. */
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log_error_errno(m->have_ask_password, "Failed to list /run/systemd/ask-password: %m");
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return 0;
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}
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static void manager_close_ask_password(Manager *m) {
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assert(m);
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m->ask_password_event_source = sd_event_source_unref(m->ask_password_event_source);
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m->ask_password_inotify_fd = safe_close(m->ask_password_inotify_fd);
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m->have_ask_password = -EINVAL;
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}
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static int manager_check_ask_password(Manager *m) {
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int r;
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assert(m);
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if (!m->ask_password_event_source) {
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assert(m->ask_password_inotify_fd < 0);
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(void) mkdir_p_label("/run/systemd/ask-password", 0755);
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m->ask_password_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
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if (m->ask_password_inotify_fd < 0)
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return log_error_errno(errno, "Failed to create inotify object: %m");
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r = inotify_add_watch_and_warn(m->ask_password_inotify_fd,
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"/run/systemd/ask-password",
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IN_CREATE|IN_DELETE|IN_MOVE);
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if (r < 0) {
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manager_close_ask_password(m);
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return r;
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}
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r = sd_event_add_io(m->event, &m->ask_password_event_source,
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m->ask_password_inotify_fd, EPOLLIN,
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manager_dispatch_ask_password_fd, m);
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if (r < 0) {
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log_error_errno(r, "Failed to add event source for /run/systemd/ask-password: %m");
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manager_close_ask_password(m);
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return r;
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}
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(void) sd_event_source_set_description(m->ask_password_event_source, "manager-ask-password");
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/* Queries might have been added meanwhile... */
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manager_dispatch_ask_password_fd(m->ask_password_event_source,
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m->ask_password_inotify_fd, EPOLLIN, m);
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}
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return m->have_ask_password;
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}
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static int manager_watch_idle_pipe(Manager *m) {
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int r;
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assert(m);
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if (m->idle_pipe_event_source)
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return 0;
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if (m->idle_pipe[2] < 0)
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return 0;
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r = sd_event_add_io(m->event, &m->idle_pipe_event_source, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m);
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if (r < 0)
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return log_error_errno(r, "Failed to watch idle pipe: %m");
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(void) sd_event_source_set_description(m->idle_pipe_event_source, "manager-idle-pipe");
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return 0;
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}
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static void manager_close_idle_pipe(Manager *m) {
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assert(m);
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m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
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safe_close_pair(m->idle_pipe);
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safe_close_pair(m->idle_pipe + 2);
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}
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static int manager_setup_time_change(Manager *m) {
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int r;
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assert(m);
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if (MANAGER_IS_TEST_RUN(m))
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return 0;
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m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);
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m->time_change_fd = safe_close(m->time_change_fd);
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m->time_change_fd = time_change_fd();
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if (m->time_change_fd < 0)
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return log_error_errno(m->time_change_fd, "Failed to create timer change timer fd: %m");
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r = sd_event_add_io(m->event, &m->time_change_event_source, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m);
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if (r < 0)
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return log_error_errno(r, "Failed to create time change event source: %m");
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/* Schedule this slightly earlier than the .timer event sources */
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r = sd_event_source_set_priority(m->time_change_event_source, SD_EVENT_PRIORITY_NORMAL-1);
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if (r < 0)
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return log_error_errno(r, "Failed to set priority of time change event sources: %m");
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(void) sd_event_source_set_description(m->time_change_event_source, "manager-time-change");
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log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
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return 0;
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}
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static int manager_read_timezone_stat(Manager *m) {
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struct stat st;
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bool changed;
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assert(m);
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/* Read the current stat() data of /etc/localtime so that we detect changes */
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if (lstat("/etc/localtime", &st) < 0) {
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log_debug_errno(errno, "Failed to stat /etc/localtime, ignoring: %m");
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changed = m->etc_localtime_accessible;
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m->etc_localtime_accessible = false;
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} else {
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usec_t k;
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k = timespec_load(&st.st_mtim);
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changed = !m->etc_localtime_accessible || k != m->etc_localtime_mtime;
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m->etc_localtime_mtime = k;
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m->etc_localtime_accessible = true;
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}
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return changed;
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}
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static int manager_setup_timezone_change(Manager *m) {
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_cleanup_(sd_event_source_unrefp) sd_event_source *new_event = NULL;
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int r;
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assert(m);
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if (MANAGER_IS_TEST_RUN(m))
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return 0;
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/* We watch /etc/localtime for three events: change of the link count (which might mean removal from /etc even
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* though another link might be kept), renames, and file close operations after writing. Note we don't bother
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* with IN_DELETE_SELF, as that would just report when the inode is removed entirely, i.e. after the link count
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* went to zero and all fds to it are closed.
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*
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* Note that we never follow symlinks here. This is a simplification, but should cover almost all cases
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* correctly.
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*
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* Note that we create the new event source first here, before releasing the old one. This should optimize
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* behaviour as this way sd-event can reuse the old watch in case the inode didn't change. */
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r = sd_event_add_inotify(m->event, &new_event, "/etc/localtime",
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IN_ATTRIB|IN_MOVE_SELF|IN_CLOSE_WRITE|IN_DONT_FOLLOW, manager_dispatch_timezone_change, m);
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if (r == -ENOENT) {
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/* If the file doesn't exist yet, subscribe to /etc instead, and wait until it is created either by
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* O_CREATE or by rename() */
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log_debug_errno(r, "/etc/localtime doesn't exist yet, watching /etc instead.");
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r = sd_event_add_inotify(m->event, &new_event, "/etc",
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IN_CREATE|IN_MOVED_TO|IN_ONLYDIR, manager_dispatch_timezone_change, m);
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}
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if (r < 0)
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return log_error_errno(r, "Failed to create timezone change event source: %m");
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/* Schedule this slightly earlier than the .timer event sources */
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r = sd_event_source_set_priority(new_event, SD_EVENT_PRIORITY_NORMAL-1);
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if (r < 0)
|
|
return log_error_errno(r, "Failed to set priority of timezone change event sources: %m");
|
|
|
|
sd_event_source_unref(m->timezone_change_event_source);
|
|
m->timezone_change_event_source = TAKE_PTR(new_event);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int enable_special_signals(Manager *m) {
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return 0;
|
|
|
|
/* 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 && !IN_SET(errno, EPERM, EINVAL))
|
|
log_warning_errno(errno, "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_errno(errno, "Failed to open /dev/tty0: %m");
|
|
} else {
|
|
/* Enable that we get SIGWINCH on kbrequest */
|
|
if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
|
|
log_warning_errno(errno, "Failed to enable kbrequest handling: %m");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define RTSIG_IF_AVAILABLE(signum) (signum <= SIGRTMAX ? signum : -1)
|
|
|
|
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);
|
|
|
|
assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
|
|
|
|
/* We make liberal use of realtime signals here. On
|
|
* Linux/glibc we have 30 of them (with the exception of Linux
|
|
* on hppa, see below), between SIGRTMIN+0 ... SIGRTMIN+30
|
|
* (aka SIGRTMAX). */
|
|
|
|
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 */
|
|
|
|
/* ... space for more special targets ... */
|
|
|
|
SIGRTMIN+13, /* systemd: Immediate halt */
|
|
SIGRTMIN+14, /* systemd: Immediate poweroff */
|
|
SIGRTMIN+15, /* systemd: Immediate reboot */
|
|
SIGRTMIN+16, /* systemd: Immediate kexec */
|
|
|
|
/* ... space for more immediate system state changes ... */
|
|
|
|
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) */
|
|
|
|
/* .. one free signal here ... */
|
|
|
|
/* Apparently Linux on hppa had fewer RT signals until v3.18,
|
|
* SIGRTMAX was SIGRTMIN+25, and then SIGRTMIN was lowered,
|
|
* see commit v3.17-7614-g1f25df2eff.
|
|
*
|
|
* We cannot unconditionally make use of those signals here,
|
|
* so let's use a runtime check. Since these commands are
|
|
* accessible by different means and only really a safety
|
|
* net, the missing functionality on hppa shouldn't matter.
|
|
*/
|
|
|
|
RTSIG_IF_AVAILABLE(SIGRTMIN+26), /* systemd: set log target to journal-or-kmsg */
|
|
RTSIG_IF_AVAILABLE(SIGRTMIN+27), /* systemd: set log target to console */
|
|
RTSIG_IF_AVAILABLE(SIGRTMIN+28), /* systemd: set log target to kmsg */
|
|
RTSIG_IF_AVAILABLE(SIGRTMIN+29), /* systemd: set log target to syslog-or-kmsg (obsolete) */
|
|
|
|
/* ... one free signal here SIGRTMIN+30 ... */
|
|
-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;
|
|
|
|
(void) sd_event_source_set_description(m->signal_event_source, "manager-signal");
|
|
|
|
/* Process signals a bit earlier than the rest of things, but later than notify_fd processing, so that the
|
|
* notify processing can still figure out to which process/service a message belongs, before we reap the
|
|
* process. Also, process this before handling cgroup notifications, so that we always collect child exit
|
|
* status information before detecting that there's no process in a cgroup. */
|
|
r = sd_event_source_set_priority(m->signal_event_source, SD_EVENT_PRIORITY_NORMAL-6);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
return enable_special_signals(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static char** sanitize_environment(char **l) {
|
|
|
|
/* Let's remove some environment variables that we need ourselves to communicate with our clients */
|
|
strv_env_unset_many(
|
|
l,
|
|
"EXIT_CODE",
|
|
"EXIT_STATUS",
|
|
"INVOCATION_ID",
|
|
"JOURNAL_STREAM",
|
|
"LISTEN_FDNAMES",
|
|
"LISTEN_FDS",
|
|
"LISTEN_PID",
|
|
"MAINPID",
|
|
"MANAGERPID",
|
|
"NOTIFY_SOCKET",
|
|
"PIDFILE",
|
|
"REMOTE_ADDR",
|
|
"REMOTE_PORT",
|
|
"SERVICE_RESULT",
|
|
"WATCHDOG_PID",
|
|
"WATCHDOG_USEC",
|
|
NULL);
|
|
|
|
/* Let's order the environment alphabetically, just to make it pretty */
|
|
strv_sort(l);
|
|
|
|
return l;
|
|
}
|
|
|
|
int manager_default_environment(Manager *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
m->transient_environment = strv_free(m->transient_environment);
|
|
|
|
if (MANAGER_IS_SYSTEM(m)) {
|
|
/* The system manager always starts with a clean
|
|
* environment for its children. It does not import
|
|
* the kernel's or the parents' exported variables.
|
|
*
|
|
* The initial passed environment is untouched to keep
|
|
* /proc/self/environ valid; it is used for tagging
|
|
* the init process inside containers. */
|
|
m->transient_environment = strv_new("PATH=" DEFAULT_PATH);
|
|
if (!m->transient_environment)
|
|
return log_oom();
|
|
|
|
/* Import locale variables LC_*= from configuration */
|
|
(void) locale_setup(&m->transient_environment);
|
|
} else {
|
|
_cleanup_free_ char *k = NULL;
|
|
|
|
/* The user manager passes its own environment
|
|
* along to its children, except for $PATH. */
|
|
m->transient_environment = strv_copy(environ);
|
|
if (!m->transient_environment)
|
|
return log_oom();
|
|
|
|
k = strdup("PATH=" DEFAULT_USER_PATH);
|
|
if (!k)
|
|
return log_oom();
|
|
|
|
r = strv_env_replace(&m->transient_environment, k);
|
|
if (r < 0)
|
|
return log_oom();
|
|
TAKE_PTR(k);
|
|
}
|
|
|
|
sanitize_environment(m->transient_environment);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_setup_prefix(Manager *m) {
|
|
struct table_entry {
|
|
uint64_t type;
|
|
const char *suffix;
|
|
};
|
|
|
|
static const struct table_entry paths_system[_EXEC_DIRECTORY_TYPE_MAX] = {
|
|
[EXEC_DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME, NULL },
|
|
[EXEC_DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE, NULL },
|
|
[EXEC_DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE, NULL },
|
|
[EXEC_DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS, NULL },
|
|
[EXEC_DIRECTORY_CONFIGURATION] = { SD_PATH_SYSTEM_CONFIGURATION, NULL },
|
|
};
|
|
|
|
static const struct table_entry paths_user[_EXEC_DIRECTORY_TYPE_MAX] = {
|
|
[EXEC_DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME, NULL },
|
|
[EXEC_DIRECTORY_STATE] = { SD_PATH_USER_CONFIGURATION, NULL },
|
|
[EXEC_DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE, NULL },
|
|
[EXEC_DIRECTORY_LOGS] = { SD_PATH_USER_CONFIGURATION, "log" },
|
|
[EXEC_DIRECTORY_CONFIGURATION] = { SD_PATH_USER_CONFIGURATION, NULL },
|
|
};
|
|
|
|
assert(m);
|
|
|
|
const struct table_entry *p = MANAGER_IS_SYSTEM(m) ? paths_system : paths_user;
|
|
int r;
|
|
|
|
for (ExecDirectoryType i = 0; i < _EXEC_DIRECTORY_TYPE_MAX; i++) {
|
|
r = sd_path_lookup(p[i].type, p[i].suffix, &m->prefix[i]);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void manager_free_unit_name_maps(Manager *m) {
|
|
m->unit_id_map = hashmap_free(m->unit_id_map);
|
|
m->unit_name_map = hashmap_free(m->unit_name_map);
|
|
m->unit_path_cache = set_free(m->unit_path_cache);
|
|
m->unit_cache_mtime = 0;
|
|
}
|
|
|
|
static int manager_setup_run_queue(Manager *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(!m->run_queue_event_source);
|
|
|
|
r = sd_event_add_defer(m->event, &m->run_queue_event_source, manager_dispatch_run_queue, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) sd_event_source_set_description(m->run_queue_event_source, "manager-run-queue");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_setup_sigchld_event_source(Manager *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(!m->sigchld_event_source);
|
|
|
|
r = sd_event_add_defer(m->event, &m->sigchld_event_source, manager_dispatch_sigchld, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_priority(m->sigchld_event_source, SD_EVENT_PRIORITY_NORMAL-7);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_OFF);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) sd_event_source_set_description(m->sigchld_event_source, "manager-sigchld");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_new(UnitFileScope scope, ManagerTestRunFlags test_run_flags, Manager **_m) {
|
|
_cleanup_(manager_freep) Manager *m = NULL;
|
|
int r;
|
|
|
|
assert(_m);
|
|
assert(IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER));
|
|
|
|
m = new(Manager, 1);
|
|
if (!m)
|
|
return -ENOMEM;
|
|
|
|
*m = (Manager) {
|
|
.unit_file_scope = scope,
|
|
.objective = _MANAGER_OBJECTIVE_INVALID,
|
|
|
|
.status_unit_format = STATUS_UNIT_FORMAT_DEFAULT,
|
|
|
|
.default_timer_accuracy_usec = USEC_PER_MINUTE,
|
|
.default_memory_accounting = MEMORY_ACCOUNTING_DEFAULT,
|
|
.default_tasks_accounting = true,
|
|
.default_tasks_max = TASKS_MAX_UNSET,
|
|
.default_timeout_start_usec = DEFAULT_TIMEOUT_USEC,
|
|
.default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC,
|
|
.default_restart_usec = DEFAULT_RESTART_USEC,
|
|
|
|
.original_log_level = -1,
|
|
.original_log_target = _LOG_TARGET_INVALID,
|
|
|
|
.watchdog_overridden[WATCHDOG_RUNTIME] = USEC_INFINITY,
|
|
.watchdog_overridden[WATCHDOG_REBOOT] = USEC_INFINITY,
|
|
.watchdog_overridden[WATCHDOG_KEXEC] = USEC_INFINITY,
|
|
|
|
.show_status_overridden = _SHOW_STATUS_INVALID,
|
|
|
|
.notify_fd = -1,
|
|
.cgroups_agent_fd = -1,
|
|
.signal_fd = -1,
|
|
.time_change_fd = -1,
|
|
.user_lookup_fds = { -1, -1 },
|
|
.private_listen_fd = -1,
|
|
.dev_autofs_fd = -1,
|
|
.cgroup_inotify_fd = -1,
|
|
.pin_cgroupfs_fd = -1,
|
|
.ask_password_inotify_fd = -1,
|
|
.idle_pipe = { -1, -1, -1, -1},
|
|
|
|
/* start as id #1, so that we can leave #0 around as "null-like" value */
|
|
.current_job_id = 1,
|
|
|
|
.have_ask_password = -EINVAL, /* we don't know */
|
|
.first_boot = -1,
|
|
.test_run_flags = test_run_flags,
|
|
|
|
.default_oom_policy = OOM_STOP,
|
|
};
|
|
|
|
#if ENABLE_EFI
|
|
if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0)
|
|
boot_timestamps(m->timestamps + MANAGER_TIMESTAMP_USERSPACE,
|
|
m->timestamps + MANAGER_TIMESTAMP_FIRMWARE,
|
|
m->timestamps + MANAGER_TIMESTAMP_LOADER);
|
|
#endif
|
|
|
|
/* Prepare log fields we can use for structured logging */
|
|
if (MANAGER_IS_SYSTEM(m)) {
|
|
m->unit_log_field = "UNIT=";
|
|
m->unit_log_format_string = "UNIT=%s";
|
|
|
|
m->invocation_log_field = "INVOCATION_ID=";
|
|
m->invocation_log_format_string = "INVOCATION_ID=%s";
|
|
} else {
|
|
m->unit_log_field = "USER_UNIT=";
|
|
m->unit_log_format_string = "USER_UNIT=%s";
|
|
|
|
m->invocation_log_field = "USER_INVOCATION_ID=";
|
|
m->invocation_log_format_string = "USER_INVOCATION_ID=%s";
|
|
}
|
|
|
|
/* Reboot immediately if the user hits C-A-D more often than 7x per 2s */
|
|
m->ctrl_alt_del_ratelimit = (RateLimit) { .interval = 2 * USEC_PER_SEC, .burst = 7 };
|
|
|
|
r = manager_default_environment(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = hashmap_ensure_allocated(&m->units, &string_hash_ops);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = hashmap_ensure_allocated(&m->cgroup_unit, &path_hash_ops);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = hashmap_ensure_allocated(&m->watch_bus, &string_hash_ops);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = prioq_ensure_allocated(&m->run_queue, compare_job_priority);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_setup_prefix(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_default(&m->event);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_setup_run_queue(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (test_run_flags == MANAGER_TEST_RUN_MINIMAL) {
|
|
m->cgroup_root = strdup("");
|
|
if (!m->cgroup_root)
|
|
return -ENOMEM;
|
|
} else {
|
|
r = manager_setup_signals(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_setup_cgroup(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_setup_time_change(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = manager_read_timezone_stat(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) manager_setup_timezone_change(m);
|
|
|
|
r = manager_setup_sigchld_event_source(m);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (test_run_flags == 0) {
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
r = mkdir_label("/run/systemd/units", 0755);
|
|
else {
|
|
_cleanup_free_ char *units_path = NULL;
|
|
r = xdg_user_runtime_dir(&units_path, "/systemd/units");
|
|
if (r < 0)
|
|
return r;
|
|
r = mkdir_p_label(units_path, 0755);
|
|
}
|
|
|
|
if (r < 0 && r != -EEXIST)
|
|
return r;
|
|
}
|
|
|
|
m->taint_usr =
|
|
!in_initrd() &&
|
|
dir_is_empty("/usr") > 0;
|
|
|
|
/* Note that we do not set up the notify fd here. We do that after deserialization,
|
|
* since they might have gotten serialized across the reexec. */
|
|
|
|
*_m = TAKE_PTR(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_setup_notify(Manager *m) {
|
|
int r;
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return 0;
|
|
|
|
if (m->notify_fd < 0) {
|
|
_cleanup_close_ int fd = -1;
|
|
union sockaddr_union sa;
|
|
socklen_t sa_len;
|
|
|
|
/* First free all secondary fields */
|
|
m->notify_socket = mfree(m->notify_socket);
|
|
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)
|
|
return log_error_errno(errno, "Failed to allocate notification socket: %m");
|
|
|
|
fd_inc_rcvbuf(fd, NOTIFY_RCVBUF_SIZE);
|
|
|
|
m->notify_socket = path_join(m->prefix[EXEC_DIRECTORY_RUNTIME], "systemd/notify");
|
|
if (!m->notify_socket)
|
|
return log_oom();
|
|
|
|
r = sockaddr_un_set_path(&sa.un, m->notify_socket);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Notify socket '%s' not valid for AF_UNIX socket address, refusing.",
|
|
m->notify_socket);
|
|
sa_len = r;
|
|
|
|
(void) mkdir_parents_label(m->notify_socket, 0755);
|
|
(void) sockaddr_un_unlink(&sa.un);
|
|
|
|
r = bind(fd, &sa.sa, sa_len);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "bind(%s) failed: %m", m->notify_socket);
|
|
|
|
r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
|
|
if (r < 0)
|
|
return log_error_errno(r, "SO_PASSCRED failed: %m");
|
|
|
|
m->notify_fd = TAKE_FD(fd);
|
|
|
|
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)
|
|
return log_error_errno(r, "Failed to allocate notify event source: %m");
|
|
|
|
/* Process notification messages 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, SD_EVENT_PRIORITY_NORMAL-8);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set priority of notify event source: %m");
|
|
|
|
(void) sd_event_source_set_description(m->notify_event_source, "manager-notify");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_setup_cgroups_agent(Manager *m) {
|
|
|
|
static const union sockaddr_union sa = {
|
|
.un.sun_family = AF_UNIX,
|
|
.un.sun_path = "/run/systemd/cgroups-agent",
|
|
};
|
|
int r;
|
|
|
|
/* This creates a listening socket we receive cgroups agent messages on. We do not use D-Bus for delivering
|
|
* these messages from the cgroups agent binary to PID 1, as the cgroups agent binary is very short-living, and
|
|
* each instance of it needs a new D-Bus connection. Since D-Bus connections are SOCK_STREAM/AF_UNIX, on
|
|
* overloaded systems the backlog of the D-Bus socket becomes relevant, as not more than the configured number
|
|
* of D-Bus connections may be queued until the kernel will start dropping further incoming connections,
|
|
* possibly resulting in lost cgroups agent messages. To avoid this, we'll use a private SOCK_DGRAM/AF_UNIX
|
|
* socket, where no backlog is relevant as communication may take place without an actual connect() cycle, and
|
|
* we thus won't lose messages.
|
|
*
|
|
* Note that PID 1 will forward the agent message to system bus, so that the user systemd instance may listen
|
|
* to it. The system instance hence listens on this special socket, but the user instances listen on the system
|
|
* bus for these messages. */
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return 0;
|
|
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return 0;
|
|
|
|
r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to determine whether unified cgroups hierarchy is used: %m");
|
|
if (r > 0) /* We don't need this anymore on the unified hierarchy */
|
|
return 0;
|
|
|
|
if (m->cgroups_agent_fd < 0) {
|
|
_cleanup_close_ int fd = -1;
|
|
|
|
/* First free all secondary fields */
|
|
m->cgroups_agent_event_source = sd_event_source_unref(m->cgroups_agent_event_source);
|
|
|
|
fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
|
|
if (fd < 0)
|
|
return log_error_errno(errno, "Failed to allocate cgroups agent socket: %m");
|
|
|
|
fd_inc_rcvbuf(fd, CGROUPS_AGENT_RCVBUF_SIZE);
|
|
|
|
(void) sockaddr_un_unlink(&sa.un);
|
|
|
|
/* Only allow root to connect to this socket */
|
|
RUN_WITH_UMASK(0077)
|
|
r = bind(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
|
|
if (r < 0)
|
|
return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
|
|
|
|
m->cgroups_agent_fd = TAKE_FD(fd);
|
|
}
|
|
|
|
if (!m->cgroups_agent_event_source) {
|
|
r = sd_event_add_io(m->event, &m->cgroups_agent_event_source, m->cgroups_agent_fd, EPOLLIN, manager_dispatch_cgroups_agent_fd, m);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to allocate cgroups agent event source: %m");
|
|
|
|
/* Process cgroups notifications early. Note that when the agent notification is received
|
|
* we'll just enqueue the unit in the cgroup empty queue, hence pick a high priority than
|
|
* that. Also see handling of cgroup inotify for the unified cgroup stuff. */
|
|
r = sd_event_source_set_priority(m->cgroups_agent_event_source, SD_EVENT_PRIORITY_NORMAL-9);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set priority of cgroups agent event source: %m");
|
|
|
|
(void) sd_event_source_set_description(m->cgroups_agent_event_source, "manager-cgroups-agent");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_setup_user_lookup_fd(Manager *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
/* Set up the socket pair used for passing UID/GID resolution results from forked off processes to PID
|
|
* 1. Background: we can't do name lookups (NSS) from PID 1, since it might involve IPC and thus activation,
|
|
* and we might hence deadlock on ourselves. Hence we do all user/group lookups asynchronously from the forked
|
|
* off processes right before executing the binaries to start. In order to be able to clean up any IPC objects
|
|
* created by a unit (see RemoveIPC=) we need to know in PID 1 the used UID/GID of the executed processes,
|
|
* hence we establish this communication channel so that forked off processes can pass their UID/GID
|
|
* information back to PID 1. The forked off processes send their resolved UID/GID to PID 1 in a simple
|
|
* datagram, along with their unit name, so that we can share one communication socket pair among all units for
|
|
* this purpose.
|
|
*
|
|
* You might wonder why we need a communication channel for this that is independent of the usual notification
|
|
* socket scheme (i.e. $NOTIFY_SOCKET). The primary difference is about trust: data sent via the $NOTIFY_SOCKET
|
|
* channel is only accepted if it originates from the right unit and if reception was enabled for it. The user
|
|
* lookup socket OTOH is only accessible by PID 1 and its children until they exec(), and always available.
|
|
*
|
|
* Note that this function is called under two circumstances: when we first initialize (in which case we
|
|
* allocate both the socket pair and the event source to listen on it), and when we deserialize after a reload
|
|
* (in which case the socket pair already exists but we still need to allocate the event source for it). */
|
|
|
|
if (m->user_lookup_fds[0] < 0) {
|
|
|
|
/* Free all secondary fields */
|
|
safe_close_pair(m->user_lookup_fds);
|
|
m->user_lookup_event_source = sd_event_source_unref(m->user_lookup_event_source);
|
|
|
|
if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, m->user_lookup_fds) < 0)
|
|
return log_error_errno(errno, "Failed to allocate user lookup socket: %m");
|
|
|
|
(void) fd_inc_rcvbuf(m->user_lookup_fds[0], NOTIFY_RCVBUF_SIZE);
|
|
}
|
|
|
|
if (!m->user_lookup_event_source) {
|
|
r = sd_event_add_io(m->event, &m->user_lookup_event_source, m->user_lookup_fds[0], EPOLLIN, manager_dispatch_user_lookup_fd, m);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to allocate user lookup event source: %m");
|
|
|
|
/* Process even earlier than the notify event source, so that we always know first about valid UID/GID
|
|
* resolutions */
|
|
r = sd_event_source_set_priority(m->user_lookup_event_source, SD_EVENT_PRIORITY_NORMAL-11);
|
|
if (r < 0)
|
|
return log_error_errno(errno, "Failed to set priority of user lookup event source: %m");
|
|
|
|
(void) sd_event_source_set_description(m->user_lookup_event_source, "user-lookup");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_mark_good(Unit *u, unsigned gc_marker) {
|
|
Unit *other;
|
|
Iterator i;
|
|
void *v;
|
|
|
|
u->gc_marker = gc_marker + GC_OFFSET_GOOD;
|
|
|
|
/* Recursively mark referenced units as GOOD as well */
|
|
HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REFERENCES], i)
|
|
if (other->gc_marker == gc_marker + GC_OFFSET_UNSURE)
|
|
unit_gc_mark_good(other, gc_marker);
|
|
}
|
|
|
|
static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
|
|
Unit *other;
|
|
bool is_bad;
|
|
Iterator i;
|
|
void *v;
|
|
|
|
assert(u);
|
|
|
|
if (IN_SET(u->gc_marker - gc_marker,
|
|
GC_OFFSET_GOOD, GC_OFFSET_BAD, GC_OFFSET_UNSURE, GC_OFFSET_IN_PATH))
|
|
return;
|
|
|
|
if (u->in_cleanup_queue)
|
|
goto bad;
|
|
|
|
if (!unit_may_gc(u))
|
|
goto good;
|
|
|
|
u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
|
|
|
|
is_bad = true;
|
|
|
|
HASHMAP_FOREACH_KEY(v, 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 (u->refs_by_target) {
|
|
const UnitRef *ref;
|
|
|
|
LIST_FOREACH(refs_by_target, ref, u->refs_by_target) {
|
|
unit_gc_sweep(ref->source, gc_marker);
|
|
|
|
if (ref->source->gc_marker == gc_marker + GC_OFFSET_GOOD)
|
|
goto good;
|
|
|
|
if (ref->source->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:
|
|
unit_gc_mark_good(u, gc_marker);
|
|
}
|
|
|
|
static unsigned manager_dispatch_gc_unit_queue(Manager *m) {
|
|
unsigned n = 0, gc_marker;
|
|
Unit *u;
|
|
|
|
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_unit_queue)) {
|
|
assert(u->in_gc_queue);
|
|
|
|
unit_gc_sweep(u, gc_marker);
|
|
|
|
LIST_REMOVE(gc_queue, m->gc_unit_queue, u);
|
|
u->in_gc_queue = false;
|
|
|
|
n++;
|
|
|
|
if (IN_SET(u->gc_marker - gc_marker,
|
|
GC_OFFSET_BAD, GC_OFFSET_UNSURE)) {
|
|
if (u->id)
|
|
log_unit_debug(u, "Collecting.");
|
|
u->gc_marker = gc_marker + GC_OFFSET_BAD;
|
|
unit_add_to_cleanup_queue(u);
|
|
}
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
static unsigned manager_dispatch_gc_job_queue(Manager *m) {
|
|
unsigned n = 0;
|
|
Job *j;
|
|
|
|
assert(m);
|
|
|
|
while ((j = m->gc_job_queue)) {
|
|
assert(j->in_gc_queue);
|
|
|
|
LIST_REMOVE(gc_queue, m->gc_job_queue, j);
|
|
j->in_gc_queue = false;
|
|
|
|
n++;
|
|
|
|
if (!job_may_gc(j))
|
|
continue;
|
|
|
|
log_unit_debug(j->unit, "Collecting job.");
|
|
(void) job_finish_and_invalidate(j, JOB_COLLECTED, false, false);
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
static unsigned manager_dispatch_stop_when_unneeded_queue(Manager *m) {
|
|
unsigned n = 0;
|
|
Unit *u;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
while ((u = m->stop_when_unneeded_queue)) {
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
assert(m->stop_when_unneeded_queue);
|
|
|
|
assert(u->in_stop_when_unneeded_queue);
|
|
LIST_REMOVE(stop_when_unneeded_queue, m->stop_when_unneeded_queue, u);
|
|
u->in_stop_when_unneeded_queue = false;
|
|
|
|
n++;
|
|
|
|
if (!unit_is_unneeded(u))
|
|
continue;
|
|
|
|
log_unit_debug(u, "Unit is not needed anymore.");
|
|
|
|
/* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
|
|
* service being unnecessary after a while. */
|
|
|
|
if (!ratelimit_below(&u->auto_stop_ratelimit)) {
|
|
log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently.");
|
|
continue;
|
|
}
|
|
|
|
/* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
|
|
r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, NULL, &error, NULL);
|
|
if (r < 0)
|
|
log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r));
|
|
}
|
|
|
|
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(prioq_isempty(m->run_queue));
|
|
assert(!m->dbus_unit_queue);
|
|
assert(!m->dbus_job_queue);
|
|
assert(!m->cleanup_queue);
|
|
assert(!m->gc_unit_queue);
|
|
assert(!m->gc_job_queue);
|
|
assert(!m->stop_when_unneeded_queue);
|
|
|
|
assert(hashmap_isempty(m->jobs));
|
|
assert(hashmap_isempty(m->units));
|
|
|
|
m->n_on_console = 0;
|
|
m->n_running_jobs = 0;
|
|
m->n_installed_jobs = 0;
|
|
m->n_failed_jobs = 0;
|
|
}
|
|
|
|
Manager* manager_free(Manager *m) {
|
|
if (!m)
|
|
return NULL;
|
|
|
|
manager_clear_jobs_and_units(m);
|
|
|
|
for (UnitType c = 0; c < _UNIT_TYPE_MAX; c++)
|
|
if (unit_vtable[c]->shutdown)
|
|
unit_vtable[c]->shutdown(m);
|
|
|
|
/* Keep the cgroup hierarchy in place except when we know we are going down for good */
|
|
manager_shutdown_cgroup(m, IN_SET(m->objective, MANAGER_EXIT, MANAGER_REBOOT, MANAGER_POWEROFF, MANAGER_HALT, MANAGER_KEXEC));
|
|
|
|
lookup_paths_flush_generator(&m->lookup_paths);
|
|
|
|
bus_done(m);
|
|
manager_varlink_done(m);
|
|
|
|
exec_runtime_vacuum(m);
|
|
hashmap_free(m->exec_runtime_by_id);
|
|
|
|
dynamic_user_vacuum(m, false);
|
|
hashmap_free(m->dynamic_users);
|
|
|
|
hashmap_free(m->units);
|
|
hashmap_free(m->units_by_invocation_id);
|
|
hashmap_free(m->jobs);
|
|
hashmap_free(m->watch_pids);
|
|
hashmap_free(m->watch_bus);
|
|
|
|
prioq_free(m->run_queue);
|
|
|
|
set_free(m->startup_units);
|
|
set_free(m->failed_units);
|
|
|
|
sd_event_source_unref(m->signal_event_source);
|
|
sd_event_source_unref(m->sigchld_event_source);
|
|
sd_event_source_unref(m->notify_event_source);
|
|
sd_event_source_unref(m->cgroups_agent_event_source);
|
|
sd_event_source_unref(m->time_change_event_source);
|
|
sd_event_source_unref(m->timezone_change_event_source);
|
|
sd_event_source_unref(m->jobs_in_progress_event_source);
|
|
sd_event_source_unref(m->run_queue_event_source);
|
|
sd_event_source_unref(m->user_lookup_event_source);
|
|
|
|
safe_close(m->signal_fd);
|
|
safe_close(m->notify_fd);
|
|
safe_close(m->cgroups_agent_fd);
|
|
safe_close(m->time_change_fd);
|
|
safe_close_pair(m->user_lookup_fds);
|
|
|
|
manager_close_ask_password(m);
|
|
|
|
manager_close_idle_pipe(m);
|
|
|
|
sd_event_unref(m->event);
|
|
|
|
free(m->notify_socket);
|
|
|
|
lookup_paths_free(&m->lookup_paths);
|
|
strv_free(m->transient_environment);
|
|
strv_free(m->client_environment);
|
|
|
|
hashmap_free(m->cgroup_unit);
|
|
manager_free_unit_name_maps(m);
|
|
|
|
free(m->switch_root);
|
|
free(m->switch_root_init);
|
|
|
|
rlimit_free_all(m->rlimit);
|
|
|
|
assert(hashmap_isempty(m->units_requiring_mounts_for));
|
|
hashmap_free(m->units_requiring_mounts_for);
|
|
|
|
hashmap_free(m->uid_refs);
|
|
hashmap_free(m->gid_refs);
|
|
|
|
for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++)
|
|
m->prefix[dt] = mfree(m->prefix[dt]);
|
|
|
|
return mfree(m);
|
|
}
|
|
|
|
static void manager_enumerate_perpetual(Manager *m) {
|
|
assert(m);
|
|
|
|
if (m->test_run_flags == MANAGER_TEST_RUN_MINIMAL)
|
|
return;
|
|
|
|
/* Let's ask every type to load all units from disk/kernel that it might know */
|
|
for (UnitType c = 0; c < _UNIT_TYPE_MAX; c++) {
|
|
if (!unit_type_supported(c)) {
|
|
log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c));
|
|
continue;
|
|
}
|
|
|
|
if (unit_vtable[c]->enumerate_perpetual)
|
|
unit_vtable[c]->enumerate_perpetual(m);
|
|
}
|
|
}
|
|
|
|
static void manager_enumerate(Manager *m) {
|
|
assert(m);
|
|
|
|
if (m->test_run_flags == MANAGER_TEST_RUN_MINIMAL)
|
|
return;
|
|
|
|
/* Let's ask every type to load all units from disk/kernel that it might know */
|
|
for (UnitType c = 0; c < _UNIT_TYPE_MAX; c++) {
|
|
if (!unit_type_supported(c)) {
|
|
log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c));
|
|
continue;
|
|
}
|
|
|
|
if (unit_vtable[c]->enumerate)
|
|
unit_vtable[c]->enumerate(m);
|
|
}
|
|
|
|
manager_dispatch_load_queue(m);
|
|
}
|
|
|
|
static void manager_coldplug(Manager *m) {
|
|
Iterator i;
|
|
Unit *u;
|
|
char *k;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
log_debug("Invoking unit coldplug() handlers…");
|
|
|
|
/* Let's place the units back into their deserialized state */
|
|
HASHMAP_FOREACH_KEY(u, k, m->units, i) {
|
|
|
|
/* ignore aliases */
|
|
if (u->id != k)
|
|
continue;
|
|
|
|
r = unit_coldplug(u);
|
|
if (r < 0)
|
|
log_warning_errno(r, "We couldn't coldplug %s, proceeding anyway: %m", u->id);
|
|
}
|
|
}
|
|
|
|
static void manager_catchup(Manager *m) {
|
|
Iterator i;
|
|
Unit *u;
|
|
char *k;
|
|
|
|
assert(m);
|
|
|
|
log_debug("Invoking unit catchup() handlers…");
|
|
|
|
/* Let's catch up on any state changes that happened while we were reloading/reexecing */
|
|
HASHMAP_FOREACH_KEY(u, k, m->units, i) {
|
|
|
|
/* ignore aliases */
|
|
if (u->id != k)
|
|
continue;
|
|
|
|
unit_catchup(u);
|
|
}
|
|
}
|
|
|
|
static void manager_distribute_fds(Manager *m, FDSet *fds) {
|
|
Iterator i;
|
|
Unit *u;
|
|
|
|
assert(m);
|
|
|
|
HASHMAP_FOREACH(u, m->units, i) {
|
|
|
|
if (fdset_size(fds) <= 0)
|
|
break;
|
|
|
|
if (!UNIT_VTABLE(u)->distribute_fds)
|
|
continue;
|
|
|
|
UNIT_VTABLE(u)->distribute_fds(u, fds);
|
|
}
|
|
}
|
|
|
|
static bool manager_dbus_is_running(Manager *m, bool deserialized) {
|
|
Unit *u;
|
|
|
|
assert(m);
|
|
|
|
/* This checks whether the dbus instance we are supposed to expose our APIs on is up. We check both the socket
|
|
* and the service unit. If the 'deserialized' parameter is true we'll check the deserialized state of the unit
|
|
* rather than the current one. */
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return false;
|
|
|
|
u = manager_get_unit(m, SPECIAL_DBUS_SOCKET);
|
|
if (!u)
|
|
return false;
|
|
if ((deserialized ? SOCKET(u)->deserialized_state : SOCKET(u)->state) != SOCKET_RUNNING)
|
|
return false;
|
|
|
|
u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
|
|
if (!u)
|
|
return false;
|
|
if (!IN_SET((deserialized ? SERVICE(u)->deserialized_state : SERVICE(u)->state), SERVICE_RUNNING, SERVICE_RELOAD))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void manager_setup_bus(Manager *m) {
|
|
assert(m);
|
|
|
|
/* Let's set up our private bus connection now, unconditionally */
|
|
(void) bus_init_private(m);
|
|
|
|
/* If we are in --user mode also connect to the system bus now */
|
|
if (MANAGER_IS_USER(m))
|
|
(void) bus_init_system(m);
|
|
|
|
/* Let's connect to the bus now, but only if the unit is supposed to be up */
|
|
if (manager_dbus_is_running(m, MANAGER_IS_RELOADING(m))) {
|
|
(void) bus_init_api(m);
|
|
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
(void) bus_init_system(m);
|
|
}
|
|
}
|
|
|
|
static void manager_preset_all(Manager *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (m->first_boot <= 0)
|
|
return;
|
|
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return;
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return;
|
|
|
|
/* If this is the first boot, and we are in the host system, then preset everything */
|
|
r = unit_file_preset_all(UNIT_FILE_SYSTEM, 0, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, NULL, 0);
|
|
if (r < 0)
|
|
log_full_errno(r == -EEXIST ? LOG_NOTICE : LOG_WARNING, r,
|
|
"Failed to populate /etc with preset unit settings, ignoring: %m");
|
|
else
|
|
log_info("Populated /etc with preset unit settings.");
|
|
}
|
|
|
|
static void manager_ready(Manager *m) {
|
|
assert(m);
|
|
|
|
/* After having loaded everything, do the final round of catching up with what might have changed */
|
|
|
|
m->objective = MANAGER_OK; /* Tell everyone we are up now */
|
|
|
|
/* It might be safe to log to the journal now and connect to dbus */
|
|
manager_recheck_journal(m);
|
|
manager_recheck_dbus(m);
|
|
|
|
/* Let's finally catch up with any changes that took place while we were reloading/reexecing */
|
|
manager_catchup(m);
|
|
|
|
m->honor_device_enumeration = true;
|
|
}
|
|
|
|
static Manager* manager_reloading_start(Manager *m) {
|
|
m->n_reloading++;
|
|
return m;
|
|
}
|
|
static void manager_reloading_stopp(Manager **m) {
|
|
if (*m) {
|
|
assert((*m)->n_reloading > 0);
|
|
(*m)->n_reloading--;
|
|
}
|
|
}
|
|
|
|
int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
/* If we are running in test mode, we still want to run the generators,
|
|
* but we should not touch the real generator directories. */
|
|
r = lookup_paths_init(&m->lookup_paths, m->unit_file_scope,
|
|
MANAGER_IS_TEST_RUN(m) ? LOOKUP_PATHS_TEMPORARY_GENERATED : 0,
|
|
NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to initialize path lookup table: %m");
|
|
|
|
dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_GENERATORS_START));
|
|
r = manager_run_environment_generators(m);
|
|
if (r >= 0)
|
|
r = manager_run_generators(m);
|
|
dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_GENERATORS_FINISH));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
manager_preset_all(m);
|
|
|
|
lookup_paths_log(&m->lookup_paths);
|
|
|
|
{
|
|
/* This block is (optionally) done with the reloading counter bumped */
|
|
_cleanup_(manager_reloading_stopp) Manager *reloading = NULL;
|
|
|
|
/* If we will deserialize make sure that during enumeration this is already known, so we increase the
|
|
* counter here already */
|
|
if (serialization)
|
|
reloading = manager_reloading_start(m);
|
|
|
|
/* First, enumerate what we can from all config files */
|
|
dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_UNITS_LOAD_START));
|
|
manager_enumerate_perpetual(m);
|
|
manager_enumerate(m);
|
|
dual_timestamp_get(m->timestamps + manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_UNITS_LOAD_FINISH));
|
|
|
|
/* Second, deserialize if there is something to deserialize */
|
|
if (serialization) {
|
|
r = manager_deserialize(m, serialization, fds);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Deserialization failed: %m");
|
|
}
|
|
|
|
/* 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. */
|
|
manager_distribute_fds(m, fds);
|
|
|
|
/* We might have deserialized the notify fd, but if we didn't then let's create the bus now */
|
|
r = manager_setup_notify(m);
|
|
if (r < 0)
|
|
/* No sense to continue without notifications, our children would fail anyway. */
|
|
return r;
|
|
|
|
r = manager_setup_cgroups_agent(m);
|
|
if (r < 0)
|
|
/* Likewise, no sense to continue without empty cgroup notifications. */
|
|
return r;
|
|
|
|
r = manager_setup_user_lookup_fd(m);
|
|
if (r < 0)
|
|
/* This shouldn't fail, except if things are really broken. */
|
|
return r;
|
|
|
|
/* Connect to the bus if we are good for it */
|
|
manager_setup_bus(m);
|
|
|
|
/* Now that we are connected to all possible buses, let's deserialize who is tracking us. */
|
|
r = bus_track_coldplug(m, &m->subscribed, false, m->deserialized_subscribed);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to deserialized tracked clients, ignoring: %m");
|
|
m->deserialized_subscribed = strv_free(m->deserialized_subscribed);
|
|
|
|
r = manager_varlink_init(m);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to set up Varlink server, ignoring: %m");
|
|
|
|
/* Third, fire things up! */
|
|
manager_coldplug(m);
|
|
|
|
/* Clean up runtime objects */
|
|
manager_vacuum(m);
|
|
|
|
if (serialization)
|
|
/* Let's wait for the UnitNew/JobNew messages being sent, before we notify that the
|
|
* reload is finished */
|
|
m->send_reloading_done = true;
|
|
}
|
|
|
|
manager_ready(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_add_job(
|
|
Manager *m,
|
|
JobType type,
|
|
Unit *unit,
|
|
JobMode mode,
|
|
Set *affected_jobs,
|
|
sd_bus_error *error,
|
|
Job **ret) {
|
|
|
|
Transaction *tr;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(type < _JOB_TYPE_MAX);
|
|
assert(unit);
|
|
assert(mode < _JOB_MODE_MAX);
|
|
|
|
if (mode == JOB_ISOLATE && type != JOB_START)
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");
|
|
|
|
if (mode == JOB_ISOLATE && !unit->allow_isolate)
|
|
return sd_bus_error_setf(error, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
|
|
|
|
if (mode == JOB_TRIGGERING && type != JOB_STOP)
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "--job-mode=triggering is only valid for stop.");
|
|
|
|
log_unit_debug(unit, "Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode));
|
|
|
|
type = 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, false,
|
|
IN_SET(mode, JOB_IGNORE_DEPENDENCIES, JOB_IGNORE_REQUIREMENTS),
|
|
mode == JOB_IGNORE_DEPENDENCIES, error);
|
|
if (r < 0)
|
|
goto tr_abort;
|
|
|
|
if (mode == JOB_ISOLATE) {
|
|
r = transaction_add_isolate_jobs(tr, m);
|
|
if (r < 0)
|
|
goto tr_abort;
|
|
}
|
|
|
|
if (mode == JOB_TRIGGERING) {
|
|
r = transaction_add_triggering_jobs(tr, unit);
|
|
if (r < 0)
|
|
goto tr_abort;
|
|
}
|
|
|
|
r = transaction_activate(tr, m, mode, affected_jobs, error);
|
|
if (r < 0)
|
|
goto tr_abort;
|
|
|
|
log_unit_debug(unit,
|
|
"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, Set *affected_jobs, sd_bus_error *e, Job **ret) {
|
|
Unit *unit = NULL; /* just to appease gcc, initialization is not really necessary */
|
|
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;
|
|
assert(unit);
|
|
|
|
return manager_add_job(m, type, unit, mode, affected_jobs, e, ret);
|
|
}
|
|
|
|
int manager_add_job_by_name_and_warn(Manager *m, JobType type, const char *name, JobMode mode, Set *affected_jobs, Job **ret) {
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(type < _JOB_TYPE_MAX);
|
|
assert(name);
|
|
assert(mode < _JOB_MODE_MAX);
|
|
|
|
r = manager_add_job_by_name(m, type, name, mode, affected_jobs, &error, ret);
|
|
if (r < 0)
|
|
return log_warning_errno(r, "Failed to enqueue %s job for %s: %s", job_mode_to_string(mode), name, bus_error_message(&error, r));
|
|
|
|
return r;
|
|
}
|
|
|
|
int manager_propagate_reload(Manager *m, Unit *unit, JobMode mode, sd_bus_error *e) {
|
|
int r;
|
|
Transaction *tr;
|
|
|
|
assert(m);
|
|
assert(unit);
|
|
assert(mode < _JOB_MODE_MAX);
|
|
assert(mode != JOB_ISOLATE); /* Isolate is only valid for start */
|
|
|
|
tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
|
|
if (!tr)
|
|
return -ENOMEM;
|
|
|
|
/* We need an anchor job */
|
|
r = transaction_add_job_and_dependencies(tr, JOB_NOP, unit, NULL, false, false, true, true, e);
|
|
if (r < 0)
|
|
goto tr_abort;
|
|
|
|
/* Failure in adding individual dependencies is ignored, so this always succeeds. */
|
|
transaction_add_propagate_reload_jobs(tr, unit, tr->anchor_job, mode == JOB_IGNORE_DEPENDENCIES, e);
|
|
|
|
r = transaction_activate(tr, m, mode, NULL, e);
|
|
if (r < 0)
|
|
goto tr_abort;
|
|
|
|
transaction_free(tr);
|
|
return 0;
|
|
|
|
tr_abort:
|
|
transaction_abort(tr);
|
|
transaction_free(tr);
|
|
return r;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static int manager_dispatch_target_deps_queue(Manager *m) {
|
|
Unit *u;
|
|
unsigned k;
|
|
int r = 0;
|
|
|
|
static const UnitDependency deps[] = {
|
|
UNIT_REQUIRED_BY,
|
|
UNIT_REQUISITE_OF,
|
|
UNIT_WANTED_BY,
|
|
UNIT_BOUND_BY
|
|
};
|
|
|
|
assert(m);
|
|
|
|
while ((u = m->target_deps_queue)) {
|
|
assert(u->in_target_deps_queue);
|
|
|
|
LIST_REMOVE(target_deps_queue, u->manager->target_deps_queue, u);
|
|
u->in_target_deps_queue = false;
|
|
|
|
for (k = 0; k < ELEMENTSOF(deps); k++) {
|
|
Unit *target;
|
|
Iterator i;
|
|
void *v;
|
|
|
|
HASHMAP_FOREACH_KEY(v, target, u->dependencies[deps[k]], i) {
|
|
r = unit_add_default_target_dependency(u, target);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
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;
|
|
|
|
/* Dispatch the units waiting for their target dependencies to be added now, as all targets that we know about
|
|
* should be loaded and have aliases resolved */
|
|
(void) manager_dispatch_target_deps_queue(m);
|
|
|
|
return n;
|
|
}
|
|
|
|
static bool manager_unit_cache_needs_refresh(Manager *m) {
|
|
assert(m);
|
|
|
|
return m->unit_cache_mtime > 0 && !lookup_paths_mtime_good(&m->lookup_paths, m->unit_cache_mtime);
|
|
}
|
|
|
|
int manager_load_unit_prepare(
|
|
Manager *m,
|
|
const char *name,
|
|
const char *path,
|
|
sd_bus_error *e,
|
|
Unit **_ret) {
|
|
|
|
_cleanup_(unit_freep) Unit *cleanup_ret = NULL;
|
|
Unit *ret;
|
|
UnitType t;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(_ret);
|
|
|
|
/* 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' and 'path' must not both be null. Check here 'path' using assert_se() to
|
|
* workaround a bug in gcc that generates a -Wnonnull warning when calling basename(),
|
|
* but this cannot be possible in any code path (See #6119). */
|
|
assert_se(path);
|
|
name = basename(path);
|
|
}
|
|
|
|
t = unit_name_to_type(name);
|
|
|
|
if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
|
|
if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE))
|
|
return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is missing the instance name.", name);
|
|
|
|
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) {
|
|
/* The time-based cache allows to start new units without daemon-reload,
|
|
* but if they are already referenced (because of dependencies or ordering)
|
|
* then we have to force a load of the fragment. As an optimization, check
|
|
* first if anything in the usual paths was modified since the last time
|
|
* the cache was loaded. */
|
|
if (ret->load_state == UNIT_NOT_FOUND && manager_unit_cache_needs_refresh(m))
|
|
ret->load_state = UNIT_STUB;
|
|
else {
|
|
*_ret = ret;
|
|
return 1;
|
|
}
|
|
} else {
|
|
ret = cleanup_ret = unit_new(m, unit_vtable[t]->object_size);
|
|
if (!ret)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (path) {
|
|
r = free_and_strdup(&ret->fragment_path, path);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = unit_add_name(ret, name);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
unit_add_to_load_queue(ret);
|
|
unit_add_to_dbus_queue(ret);
|
|
unit_add_to_gc_queue(ret);
|
|
|
|
*_ret = ret;
|
|
cleanup_ret = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_load_unit(
|
|
Manager *m,
|
|
const char *name,
|
|
const char *path,
|
|
sd_bus_error *e,
|
|
Unit **_ret) {
|
|
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(_ret);
|
|
|
|
/* 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);
|
|
|
|
*_ret = unit_follow_merge(*_ret);
|
|
return 0;
|
|
}
|
|
|
|
int manager_load_startable_unit_or_warn(
|
|
Manager *m,
|
|
const char *name,
|
|
const char *path,
|
|
Unit **ret) {
|
|
|
|
/* Load a unit, make sure it loaded fully and is not masked. */
|
|
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
Unit *unit;
|
|
int r;
|
|
|
|
r = manager_load_unit(m, name, path, &error, &unit);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to load %s %s: %s",
|
|
name ? "unit" : "unit file", name ?: path,
|
|
bus_error_message(&error, r));
|
|
|
|
r = bus_unit_validate_load_state(unit, &error);
|
|
if (r < 0)
|
|
return log_error_errno(r, "%s", bus_error_message(&error, r));
|
|
|
|
*ret = unit;
|
|
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_dump(Manager *m, FILE *f, const char *prefix) {
|
|
ManagerTimestamp q;
|
|
|
|
assert(m);
|
|
assert(f);
|
|
|
|
for (q = 0; q < _MANAGER_TIMESTAMP_MAX; q++) {
|
|
const dual_timestamp *t = m->timestamps + q;
|
|
char buf[CONST_MAX(FORMAT_TIMESPAN_MAX, FORMAT_TIMESTAMP_MAX)];
|
|
|
|
if (dual_timestamp_is_set(t))
|
|
fprintf(f, "%sTimestamp %s: %s\n",
|
|
strempty(prefix),
|
|
manager_timestamp_to_string(q),
|
|
timestamp_is_set(t->realtime) ? format_timestamp(buf, sizeof buf, t->realtime) :
|
|
format_timespan(buf, sizeof buf, t->monotonic, 1));
|
|
}
|
|
|
|
manager_dump_units(m, f, prefix);
|
|
manager_dump_jobs(m, f, prefix);
|
|
}
|
|
|
|
int manager_get_dump_string(Manager *m, char **ret) {
|
|
_cleanup_free_ char *dump = NULL;
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
size_t size;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(ret);
|
|
|
|
f = open_memstream_unlocked(&dump, &size);
|
|
if (!f)
|
|
return -errno;
|
|
|
|
manager_dump(m, f, NULL);
|
|
|
|
r = fflush_and_check(f);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
f = safe_fclose(f);
|
|
|
|
*ret = TAKE_PTR(dump);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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, false);
|
|
}
|
|
|
|
void manager_unwatch_pid(Manager *m, pid_t pid) {
|
|
assert(m);
|
|
|
|
/* First let's drop the unit keyed as "pid". */
|
|
(void) hashmap_remove(m->watch_pids, PID_TO_PTR(pid));
|
|
|
|
/* Then, let's also drop the array keyed by -pid. */
|
|
free(hashmap_remove(m->watch_pids, PID_TO_PTR(-pid)));
|
|
}
|
|
|
|
static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) {
|
|
Manager *m = userdata;
|
|
Job *j;
|
|
|
|
assert(source);
|
|
assert(m);
|
|
|
|
while ((j = prioq_peek(m->run_queue))) {
|
|
assert(j->installed);
|
|
assert(j->in_run_queue);
|
|
|
|
(void) 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) {
|
|
unsigned n = 0, budget;
|
|
Unit *u;
|
|
Job *j;
|
|
|
|
assert(m);
|
|
|
|
/* When we are reloading, let's not wait with generating signals, since we need to exit the manager as quickly
|
|
* as we can. There's no point in throttling generation of signals in that case. */
|
|
if (MANAGER_IS_RELOADING(m) || m->send_reloading_done || m->pending_reload_message)
|
|
budget = (unsigned) -1; /* infinite budget in this case */
|
|
else {
|
|
/* Anything to do at all? */
|
|
if (!m->dbus_unit_queue && !m->dbus_job_queue)
|
|
return 0;
|
|
|
|
/* Do we have overly many messages queued at the moment? If so, let's not enqueue more on top, let's
|
|
* sit this cycle out, and process things in a later cycle when the queues got a bit emptier. */
|
|
if (manager_bus_n_queued_write(m) > MANAGER_BUS_BUSY_THRESHOLD)
|
|
return 0;
|
|
|
|
/* Only process a certain number of units/jobs per event loop iteration. Even if the bus queue wasn't
|
|
* overly full before this call we shouldn't increase it in size too wildly in one step, and we
|
|
* shouldn't monopolize CPU time with generating these messages. Note the difference in counting of
|
|
* this "budget" and the "threshold" above: the "budget" is decreased only once per generated message,
|
|
* regardless how many buses/direct connections it is enqueued on, while the "threshold" is applied to
|
|
* each queued instance of bus message, i.e. if the same message is enqueued to five buses/direct
|
|
* connections it will be counted five times. This difference in counting ("references"
|
|
* vs. "instances") is primarily a result of the fact that it's easier to implement it this way,
|
|
* however it also reflects the thinking that the "threshold" should put a limit on used queue memory,
|
|
* i.e. space, while the "budget" should put a limit on time. Also note that the "threshold" is
|
|
* currently chosen much higher than the "budget". */
|
|
budget = MANAGER_BUS_MESSAGE_BUDGET;
|
|
}
|
|
|
|
while (budget != 0 && (u = m->dbus_unit_queue)) {
|
|
|
|
assert(u->in_dbus_queue);
|
|
|
|
bus_unit_send_change_signal(u);
|
|
n++;
|
|
|
|
if (budget != (unsigned) -1)
|
|
budget--;
|
|
}
|
|
|
|
while (budget != 0 && (j = m->dbus_job_queue)) {
|
|
assert(j->in_dbus_queue);
|
|
|
|
bus_job_send_change_signal(j);
|
|
n++;
|
|
|
|
if (budget != (unsigned) -1)
|
|
budget--;
|
|
}
|
|
|
|
if (m->send_reloading_done) {
|
|
m->send_reloading_done = false;
|
|
bus_manager_send_reloading(m, false);
|
|
n++;
|
|
}
|
|
|
|
if (m->pending_reload_message) {
|
|
bus_send_pending_reload_message(m);
|
|
n++;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
static int manager_dispatch_cgroups_agent_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
|
|
Manager *m = userdata;
|
|
char buf[PATH_MAX];
|
|
ssize_t n;
|
|
|
|
n = recv(fd, buf, sizeof(buf), 0);
|
|
if (n < 0)
|
|
return log_error_errno(errno, "Failed to read cgroups agent message: %m");
|
|
if (n == 0) {
|
|
log_error("Got zero-length cgroups agent message, ignoring.");
|
|
return 0;
|
|
}
|
|
if ((size_t) n >= sizeof(buf)) {
|
|
log_error("Got overly long cgroups agent message, ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
if (memchr(buf, 0, n)) {
|
|
log_error("Got cgroups agent message with embedded NUL byte, ignoring.");
|
|
return 0;
|
|
}
|
|
buf[n] = 0;
|
|
|
|
manager_notify_cgroup_empty(m, buf);
|
|
(void) bus_forward_agent_released(m, buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool manager_process_barrier_fd(char * const *tags, FDSet *fds) {
|
|
|
|
/* nothing else must be sent when using BARRIER=1 */
|
|
if (strv_contains(tags, "BARRIER=1")) {
|
|
if (strv_length(tags) == 1) {
|
|
if (fdset_size(fds) != 1)
|
|
log_warning("Got incorrect number of fds with BARRIER=1, closing them.");
|
|
} else
|
|
log_warning("Extra notification messages sent with BARRIER=1, ignoring everything.");
|
|
|
|
/* Drop the message if BARRIER=1 was found */
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void manager_invoke_notify_message(
|
|
Manager *m,
|
|
Unit *u,
|
|
const struct ucred *ucred,
|
|
char * const *tags,
|
|
FDSet *fds) {
|
|
|
|
assert(m);
|
|
assert(u);
|
|
assert(ucred);
|
|
assert(tags);
|
|
|
|
if (u->notifygen == m->notifygen) /* Already invoked on this same unit in this same iteration? */
|
|
return;
|
|
u->notifygen = m->notifygen;
|
|
|
|
if (UNIT_VTABLE(u)->notify_message)
|
|
UNIT_VTABLE(u)->notify_message(u, ucred, tags, fds);
|
|
|
|
else if (DEBUG_LOGGING) {
|
|
_cleanup_free_ char *buf = NULL, *x = NULL, *y = NULL;
|
|
|
|
buf = strv_join(tags, ", ");
|
|
if (buf)
|
|
x = ellipsize(buf, 20, 90);
|
|
if (x)
|
|
y = cescape(x);
|
|
|
|
log_unit_debug(u, "Got notification message \"%s\", ignoring.", strnull(y));
|
|
}
|
|
}
|
|
|
|
static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
|
|
|
|
_cleanup_fdset_free_ FDSet *fds = NULL;
|
|
Manager *m = userdata;
|
|
char buf[NOTIFY_BUFFER_MAX+1];
|
|
struct iovec iovec = {
|
|
.iov_base = buf,
|
|
.iov_len = sizeof(buf)-1,
|
|
};
|
|
CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred)) +
|
|
CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)) control;
|
|
struct msghdr msghdr = {
|
|
.msg_iov = &iovec,
|
|
.msg_iovlen = 1,
|
|
.msg_control = &control,
|
|
.msg_controllen = sizeof(control),
|
|
};
|
|
|
|
struct cmsghdr *cmsg;
|
|
struct ucred *ucred = NULL;
|
|
_cleanup_free_ Unit **array_copy = NULL;
|
|
_cleanup_strv_free_ char **tags = NULL;
|
|
Unit *u1, *u2, **array;
|
|
int r, *fd_array = NULL;
|
|
size_t n_fds = 0;
|
|
bool found = false;
|
|
ssize_t n;
|
|
|
|
assert(m);
|
|
assert(m->notify_fd == fd);
|
|
|
|
if (revents != EPOLLIN) {
|
|
log_warning("Got unexpected poll event for notify fd.");
|
|
return 0;
|
|
}
|
|
|
|
n = recvmsg_safe(m->notify_fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC|MSG_TRUNC);
|
|
if (IN_SET(n, -EAGAIN, -EINTR))
|
|
return 0; /* Spurious wakeup, try again */
|
|
if (n < 0)
|
|
/* If this is any other, real error, then let's stop processing this socket. This of course
|
|
* means we won't take notification messages anymore, but that's still better than busy
|
|
* looping around this: being woken up over and over again but being unable to actually read
|
|
* the message off the socket. */
|
|
return log_error_errno(n, "Failed to receive notification message: %m");
|
|
|
|
CMSG_FOREACH(cmsg, &msghdr) {
|
|
if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
|
|
|
|
assert(!fd_array);
|
|
fd_array = (int*) CMSG_DATA(cmsg);
|
|
n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
|
|
|
|
} else if (cmsg->cmsg_level == SOL_SOCKET &&
|
|
cmsg->cmsg_type == SCM_CREDENTIALS &&
|
|
cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
|
|
|
|
assert(!ucred);
|
|
ucred = (struct ucred*) CMSG_DATA(cmsg);
|
|
}
|
|
}
|
|
|
|
if (n_fds > 0) {
|
|
assert(fd_array);
|
|
|
|
r = fdset_new_array(&fds, fd_array, n_fds);
|
|
if (r < 0) {
|
|
close_many(fd_array, n_fds);
|
|
log_oom();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!ucred || !pid_is_valid(ucred->pid)) {
|
|
log_warning("Received notify message without valid credentials. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
if ((size_t) n >= sizeof(buf) || (msghdr.msg_flags & MSG_TRUNC)) {
|
|
log_warning("Received notify message exceeded maximum size. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
/* As extra safety check, let's make sure the string we get doesn't contain embedded NUL bytes. We permit one
|
|
* trailing NUL byte in the message, but don't expect it. */
|
|
if (n > 1 && memchr(buf, 0, n-1)) {
|
|
log_warning("Received notify message with embedded NUL bytes. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
/* Make sure it's NUL-terminated, then parse it to obtain the tags list */
|
|
buf[n] = 0;
|
|
tags = strv_split_newlines(buf);
|
|
if (!tags) {
|
|
log_oom();
|
|
return 0;
|
|
}
|
|
|
|
/* possibly a barrier fd, let's see */
|
|
if (manager_process_barrier_fd(tags, fds))
|
|
return 0;
|
|
|
|
/* Increase the generation counter used for filtering out duplicate unit invocations. */
|
|
m->notifygen++;
|
|
|
|
/* Notify every unit that might be interested, which might be multiple. */
|
|
u1 = manager_get_unit_by_pid_cgroup(m, ucred->pid);
|
|
u2 = hashmap_get(m->watch_pids, PID_TO_PTR(ucred->pid));
|
|
array = hashmap_get(m->watch_pids, PID_TO_PTR(-ucred->pid));
|
|
if (array) {
|
|
size_t k = 0;
|
|
|
|
while (array[k])
|
|
k++;
|
|
|
|
array_copy = newdup(Unit*, array, k+1);
|
|
if (!array_copy)
|
|
log_oom();
|
|
}
|
|
/* And now invoke the per-unit callbacks. Note that manager_invoke_notify_message() will handle duplicate units
|
|
* make sure we only invoke each unit's handler once. */
|
|
if (u1) {
|
|
manager_invoke_notify_message(m, u1, ucred, tags, fds);
|
|
found = true;
|
|
}
|
|
if (u2) {
|
|
manager_invoke_notify_message(m, u2, ucred, tags, fds);
|
|
found = true;
|
|
}
|
|
if (array_copy)
|
|
for (size_t i = 0; array_copy[i]; i++) {
|
|
manager_invoke_notify_message(m, array_copy[i], ucred, tags, fds);
|
|
found = true;
|
|
}
|
|
|
|
if (!found)
|
|
log_warning("Cannot find unit for notify message of PID "PID_FMT", ignoring.", ucred->pid);
|
|
|
|
if (fdset_size(fds) > 0)
|
|
log_warning("Got extra auxiliary fds with notification message, closing them.");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void manager_invoke_sigchld_event(
|
|
Manager *m,
|
|
Unit *u,
|
|
const siginfo_t *si) {
|
|
|
|
assert(m);
|
|
assert(u);
|
|
assert(si);
|
|
|
|
/* Already invoked the handler of this unit in this iteration? Then don't process this again */
|
|
if (u->sigchldgen == m->sigchldgen)
|
|
return;
|
|
u->sigchldgen = m->sigchldgen;
|
|
|
|
log_unit_debug(u, "Child "PID_FMT" belongs to %s.", si->si_pid, u->id);
|
|
unit_unwatch_pid(u, si->si_pid);
|
|
|
|
if (UNIT_VTABLE(u)->sigchld_event)
|
|
UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status);
|
|
}
|
|
|
|
static int manager_dispatch_sigchld(sd_event_source *source, void *userdata) {
|
|
Manager *m = userdata;
|
|
siginfo_t si = {};
|
|
int r;
|
|
|
|
assert(source);
|
|
assert(m);
|
|
|
|
/* First we call waitid() 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)
|
|
log_error_errno(errno, "Failed to peek for child with waitid(), ignoring: %m");
|
|
|
|
goto turn_off;
|
|
}
|
|
|
|
if (si.si_pid <= 0)
|
|
goto turn_off;
|
|
|
|
if (IN_SET(si.si_code, CLD_EXITED, CLD_KILLED, CLD_DUMPED)) {
|
|
_cleanup_free_ Unit **array_copy = NULL;
|
|
_cleanup_free_ char *name = NULL;
|
|
Unit *u1, *u2, **array;
|
|
|
|
(void) 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)));
|
|
|
|
/* Increase the generation counter used for filtering out duplicate unit invocations */
|
|
m->sigchldgen++;
|
|
|
|
/* And now figure out the unit this belongs to, it might be multiple... */
|
|
u1 = manager_get_unit_by_pid_cgroup(m, si.si_pid);
|
|
u2 = hashmap_get(m->watch_pids, PID_TO_PTR(si.si_pid));
|
|
array = hashmap_get(m->watch_pids, PID_TO_PTR(-si.si_pid));
|
|
if (array) {
|
|
size_t n = 0;
|
|
|
|
/* Count how many entries the array has */
|
|
while (array[n])
|
|
n++;
|
|
|
|
/* Make a copy of the array so that we don't trip up on the array changing beneath us */
|
|
array_copy = newdup(Unit*, array, n+1);
|
|
if (!array_copy)
|
|
log_oom();
|
|
}
|
|
|
|
/* Finally, execute them all. Note that u1, u2 and the array might contain duplicates, but
|
|
* that's fine, manager_invoke_sigchld_event() will ensure we only invoke the handlers once for
|
|
* each iteration. */
|
|
if (u1) {
|
|
/* We check for oom condition, in case we got SIGCHLD before the oom notification.
|
|
* We only do this for the cgroup the PID belonged to. */
|
|
(void) unit_check_oom(u1);
|
|
|
|
manager_invoke_sigchld_event(m, u1, &si);
|
|
}
|
|
if (u2)
|
|
manager_invoke_sigchld_event(m, u2, &si);
|
|
if (array_copy)
|
|
for (size_t i = 0; array_copy[i]; i++)
|
|
manager_invoke_sigchld_event(m, array_copy[i], &si);
|
|
}
|
|
|
|
/* And now, we actually reap the zombie. */
|
|
if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
|
|
log_error_errno(errno, "Failed to dequeue child, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
|
|
turn_off:
|
|
/* All children processed for now, turn off event source */
|
|
|
|
r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_OFF);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to disable SIGCHLD event source: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void manager_start_target(Manager *m, const char *name, JobMode mode) {
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
int r;
|
|
|
|
log_debug("Activating special unit %s", name);
|
|
|
|
r = manager_add_job_by_name(m, JOB_START, name, mode, NULL, &error, NULL);
|
|
if (r < 0)
|
|
log_error("Failed to enqueue %s job: %s", name, bus_error_message(&error, r));
|
|
}
|
|
|
|
static void manager_handle_ctrl_alt_del(Manager *m) {
|
|
/* If the user presses C-A-D more than
|
|
* 7 times within 2s, we reboot/shutdown immediately,
|
|
* unless it was disabled in system.conf */
|
|
|
|
if (ratelimit_below(&m->ctrl_alt_del_ratelimit) || m->cad_burst_action == EMERGENCY_ACTION_NONE)
|
|
manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
|
|
else
|
|
emergency_action(m, m->cad_burst_action, EMERGENCY_ACTION_WARN, NULL, -1,
|
|
"Ctrl-Alt-Del was pressed more than 7 times within 2s");
|
|
}
|
|
|
|
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;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->signal_fd == fd);
|
|
|
|
if (revents != EPOLLIN) {
|
|
log_warning("Got unexpected events from signal file descriptor.");
|
|
return 0;
|
|
}
|
|
|
|
n = read(m->signal_fd, &sfsi, sizeof(sfsi));
|
|
if (n != sizeof(sfsi)) {
|
|
if (n >= 0) {
|
|
log_warning("Truncated read from signal fd (%zu bytes), ignoring!", n);
|
|
return 0;
|
|
}
|
|
|
|
if (IN_SET(errno, EINTR, EAGAIN))
|
|
return 0;
|
|
|
|
/* We return an error here, which will kill this handler,
|
|
* to avoid a busy loop on read error. */
|
|
return log_error_errno(errno, "Reading from signal fd failed: %m");
|
|
}
|
|
|
|
log_received_signal(sfsi.ssi_signo == SIGCHLD ||
|
|
(sfsi.ssi_signo == SIGTERM && MANAGER_IS_USER(m))
|
|
? LOG_DEBUG : LOG_INFO,
|
|
&sfsi);
|
|
|
|
switch (sfsi.ssi_signo) {
|
|
|
|
case SIGCHLD:
|
|
r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_ON);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to enable SIGCHLD event source, ignoring: %m");
|
|
|
|
break;
|
|
|
|
case SIGTERM:
|
|
if (MANAGER_IS_SYSTEM(m)) {
|
|
/* This is for compatibility with the original sysvinit */
|
|
if (verify_run_space_and_log("Refusing to reexecute") < 0)
|
|
break;
|
|
|
|
m->objective = MANAGER_REEXECUTE;
|
|
break;
|
|
}
|
|
|
|
_fallthrough_;
|
|
case SIGINT:
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
manager_handle_ctrl_alt_del(m);
|
|
else
|
|
manager_start_target(m, SPECIAL_EXIT_TARGET,
|
|
JOB_REPLACE_IRREVERSIBLY);
|
|
break;
|
|
|
|
case SIGWINCH:
|
|
/* This is a nop on non-init */
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
|
|
|
|
break;
|
|
|
|
case SIGPWR:
|
|
/* This is a nop on non-init */
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
|
|
|
|
break;
|
|
|
|
case SIGUSR1:
|
|
if (manager_dbus_is_running(m, false)) {
|
|
log_info("Trying to reconnect to bus...");
|
|
|
|
(void) bus_init_api(m);
|
|
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
(void) bus_init_system(m);
|
|
} else {
|
|
log_info("Starting D-Bus service...");
|
|
manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
|
|
}
|
|
|
|
break;
|
|
|
|
case SIGUSR2: {
|
|
_cleanup_free_ char *dump = NULL;
|
|
|
|
r = manager_get_dump_string(m, &dump);
|
|
if (r < 0) {
|
|
log_warning_errno(errno, "Failed to acquire manager dump: %m");
|
|
break;
|
|
}
|
|
|
|
log_dump(LOG_INFO, dump);
|
|
break;
|
|
}
|
|
|
|
case SIGHUP:
|
|
if (verify_run_space_and_log("Refusing to reload") < 0)
|
|
break;
|
|
|
|
m->objective = MANAGER_RELOAD;
|
|
break;
|
|
|
|
default: {
|
|
|
|
/* Starting SIGRTMIN+0 */
|
|
static const struct {
|
|
const char *target;
|
|
JobMode mode;
|
|
} target_table[] = {
|
|
[0] = { SPECIAL_DEFAULT_TARGET, JOB_ISOLATE },
|
|
[1] = { SPECIAL_RESCUE_TARGET, JOB_ISOLATE },
|
|
[2] = { SPECIAL_EMERGENCY_TARGET, JOB_ISOLATE },
|
|
[3] = { SPECIAL_HALT_TARGET, JOB_REPLACE_IRREVERSIBLY },
|
|
[4] = { SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY },
|
|
[5] = { SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY },
|
|
[6] = { SPECIAL_KEXEC_TARGET, JOB_REPLACE_IRREVERSIBLY },
|
|
};
|
|
|
|
/* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
|
|
static const ManagerObjective objective_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].target,
|
|
target_table[idx].mode);
|
|
break;
|
|
}
|
|
|
|
if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
|
|
(int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(objective_table)) {
|
|
m->objective = objective_table[sfsi.ssi_signo - SIGRTMIN - 13];
|
|
break;
|
|
}
|
|
|
|
switch (sfsi.ssi_signo - SIGRTMIN) {
|
|
|
|
case 20:
|
|
manager_set_show_status_overridden(m, SHOW_STATUS_YES, "signal");
|
|
break;
|
|
|
|
case 21:
|
|
manager_set_show_status_overridden(m, SHOW_STATUS_NO, "signal");
|
|
break;
|
|
|
|
case 22:
|
|
manager_override_log_level(m, LOG_DEBUG);
|
|
break;
|
|
|
|
case 23:
|
|
manager_restore_original_log_level(m);
|
|
break;
|
|
|
|
case 24:
|
|
if (MANAGER_IS_USER(m)) {
|
|
m->objective = MANAGER_EXIT;
|
|
return 0;
|
|
}
|
|
|
|
/* This is a nop on init */
|
|
break;
|
|
|
|
case 26:
|
|
case 29: /* compatibility: used to be mapped to LOG_TARGET_SYSLOG_OR_KMSG */
|
|
manager_restore_original_log_target(m);
|
|
break;
|
|
|
|
case 27:
|
|
manager_override_log_target(m, LOG_TARGET_CONSOLE);
|
|
break;
|
|
|
|
case 28:
|
|
manager_override_log_target(m, LOG_TARGET_KMSG);
|
|
break;
|
|
|
|
default:
|
|
log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
|
|
}
|
|
}}
|
|
|
|
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_DEBUG,
|
|
"MESSAGE_ID=" SD_MESSAGE_TIME_CHANGE_STR,
|
|
LOG_MESSAGE("Time has been changed"));
|
|
|
|
/* Restart the watch */
|
|
(void) 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_timezone_change(
|
|
sd_event_source *source,
|
|
const struct inotify_event *e,
|
|
void *userdata) {
|
|
|
|
Manager *m = userdata;
|
|
int changed;
|
|
Iterator i;
|
|
Unit *u;
|
|
|
|
assert(m);
|
|
|
|
log_debug("inotify event for /etc/localtime");
|
|
|
|
changed = manager_read_timezone_stat(m);
|
|
if (changed <= 0)
|
|
return changed;
|
|
|
|
/* Something changed, restart the watch, to ensure we watch the new /etc/localtime if it changed */
|
|
(void) manager_setup_timezone_change(m);
|
|
|
|
/* Read the new timezone */
|
|
tzset();
|
|
|
|
log_debug("Timezone has been changed (now: %s).", tzname[daylight]);
|
|
|
|
HASHMAP_FOREACH(u, m->units, i)
|
|
if (UNIT_VTABLE(u)->timezone_change)
|
|
UNIT_VTABLE(u)->timezone_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);
|
|
|
|
/* There's at least one Type=idle child that just gave up on us waiting for the boot process to complete. Let's
|
|
* now turn off any further console output if there's at least one service that needs console access, so that
|
|
* from now on our own output should not spill into that service's output anymore. After all, we support
|
|
* Type=idle only to beautify console output and it generally is set on services that want to own the console
|
|
* exclusively without our interference. */
|
|
m->no_console_output = m->n_on_console > 0;
|
|
|
|
/* Acknowledge the child's request, and let all all other children know too that they shouldn't wait any longer
|
|
* by closing the pipes towards them, which is what they are waiting for. */
|
|
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) {
|
|
RateLimit rl = { .interval = 1*USEC_PER_SEC, .burst = 50000 };
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->objective == MANAGER_OK); /* Ensure manager_startup() has been called */
|
|
|
|
manager_check_finished(m);
|
|
|
|
/* There might still be some zombies hanging around from before we were exec()'ed. Let's reap them. */
|
|
r = sd_event_source_set_enabled(m->sigchld_event_source, SD_EVENT_ON);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to enable SIGCHLD event source: %m");
|
|
|
|
while (m->objective == MANAGER_OK) {
|
|
usec_t wait_usec, watchdog_usec;
|
|
|
|
watchdog_usec = manager_get_watchdog(m, WATCHDOG_RUNTIME);
|
|
if (timestamp_is_set(watchdog_usec))
|
|
watchdog_ping();
|
|
|
|
if (!ratelimit_below(&rl)) {
|
|
/* Yay, something is going seriously wrong, pause a little */
|
|
log_warning("Looping too fast. Throttling execution a little.");
|
|
sleep(1);
|
|
}
|
|
|
|
if (manager_dispatch_load_queue(m) > 0)
|
|
continue;
|
|
|
|
if (manager_dispatch_gc_job_queue(m) > 0)
|
|
continue;
|
|
|
|
if (manager_dispatch_gc_unit_queue(m) > 0)
|
|
continue;
|
|
|
|
if (manager_dispatch_cleanup_queue(m) > 0)
|
|
continue;
|
|
|
|
if (manager_dispatch_cgroup_realize_queue(m) > 0)
|
|
continue;
|
|
|
|
if (manager_dispatch_stop_when_unneeded_queue(m) > 0)
|
|
continue;
|
|
|
|
if (manager_dispatch_dbus_queue(m) > 0)
|
|
continue;
|
|
|
|
/* Sleep for watchdog runtime wait time */
|
|
if (timestamp_is_set(watchdog_usec))
|
|
wait_usec = watchdog_runtime_wait();
|
|
else
|
|
wait_usec = USEC_INFINITY;
|
|
|
|
r = sd_event_run(m->event, wait_usec);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to run event loop: %m");
|
|
}
|
|
|
|
return m->objective;
|
|
}
|
|
|
|
int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) {
|
|
_cleanup_free_ char *n = NULL;
|
|
sd_id128_t invocation_id;
|
|
Unit *u;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(s);
|
|
assert(_u);
|
|
|
|
r = unit_name_from_dbus_path(s, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Permit addressing units by invocation ID: if the passed bus path is suffixed by a 128bit ID then we use it
|
|
* as invocation ID. */
|
|
r = sd_id128_from_string(n, &invocation_id);
|
|
if (r >= 0) {
|
|
u = hashmap_get(m->units_by_invocation_id, &invocation_id);
|
|
if (u) {
|
|
*_u = u;
|
|
return 0;
|
|
}
|
|
|
|
return sd_bus_error_setf(e, BUS_ERROR_NO_UNIT_FOR_INVOCATION_ID,
|
|
"No unit with the specified invocation ID " SD_ID128_FORMAT_STR " known.",
|
|
SD_ID128_FORMAT_VAL(invocation_id));
|
|
}
|
|
|
|
/* If this didn't work, we check if this is a unit name */
|
|
if (!unit_name_is_valid(n, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
|
|
_cleanup_free_ char *nn = NULL;
|
|
|
|
nn = cescape(n);
|
|
return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS,
|
|
"Unit name %s is neither a valid invocation ID nor unit name.", strnull(nn));
|
|
}
|
|
|
|
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) {
|
|
|
|
#if HAVE_AUDIT
|
|
_cleanup_free_ char *p = NULL;
|
|
const char *msg;
|
|
int audit_fd, r;
|
|
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return;
|
|
|
|
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 (MANAGER_IS_RELOADING(m))
|
|
return;
|
|
|
|
if (u->type != UNIT_SERVICE)
|
|
return;
|
|
|
|
r = unit_name_to_prefix_and_instance(u->id, &p);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to extract prefix and instance of unit name: %m");
|
|
return;
|
|
}
|
|
|
|
msg = strjoina("unit=", p);
|
|
if (audit_log_user_comm_message(audit_fd, type, msg, "systemd", 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_errno(errno, "Failed to send audit message: %m");
|
|
}
|
|
#endif
|
|
|
|
}
|
|
|
|
void manager_send_unit_plymouth(Manager *m, Unit *u) {
|
|
static const union sockaddr_union sa = PLYMOUTH_SOCKET;
|
|
_cleanup_free_ char *message = NULL;
|
|
_cleanup_close_ int fd = -1;
|
|
int n = 0;
|
|
|
|
/* Don't generate plymouth events if the service was already
|
|
* started and we're just deserializing */
|
|
if (MANAGER_IS_RELOADING(m))
|
|
return;
|
|
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return;
|
|
|
|
if (detect_container() > 0)
|
|
return;
|
|
|
|
if (!IN_SET(u->type, UNIT_SERVICE, UNIT_MOUNT, 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_errno(errno, "socket() failed: %m");
|
|
return;
|
|
}
|
|
|
|
if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
|
|
if (!IN_SET(errno, EAGAIN, ENOENT) && !ERRNO_IS_DISCONNECT(errno))
|
|
log_error_errno(errno, "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, EAGAIN, ENOENT) && !ERRNO_IS_DISCONNECT(errno))
|
|
log_error_errno(errno, "Failed to write Plymouth message: %m");
|
|
}
|
|
|
|
int manager_open_serialization(Manager *m, FILE **_f) {
|
|
_cleanup_close_ int fd = -1;
|
|
FILE *f;
|
|
|
|
assert(_f);
|
|
|
|
fd = open_serialization_fd("systemd-state");
|
|
if (fd < 0)
|
|
return fd;
|
|
|
|
f = take_fdopen(&fd, "w+");
|
|
if (!f)
|
|
return -errno;
|
|
|
|
*_f = f;
|
|
return 0;
|
|
}
|
|
|
|
static bool manager_timestamp_shall_serialize(ManagerTimestamp t) {
|
|
|
|
if (!in_initrd())
|
|
return true;
|
|
|
|
/* The following timestamps only apply to the host system, hence only serialize them there */
|
|
return !IN_SET(t,
|
|
MANAGER_TIMESTAMP_USERSPACE, MANAGER_TIMESTAMP_FINISH,
|
|
MANAGER_TIMESTAMP_SECURITY_START, MANAGER_TIMESTAMP_SECURITY_FINISH,
|
|
MANAGER_TIMESTAMP_GENERATORS_START, MANAGER_TIMESTAMP_GENERATORS_FINISH,
|
|
MANAGER_TIMESTAMP_UNITS_LOAD_START, MANAGER_TIMESTAMP_UNITS_LOAD_FINISH);
|
|
}
|
|
|
|
#define DESTROY_IPC_FLAG (UINT32_C(1) << 31)
|
|
|
|
static void manager_serialize_uid_refs_internal(
|
|
Manager *m,
|
|
FILE *f,
|
|
Hashmap **uid_refs,
|
|
const char *field_name) {
|
|
|
|
Iterator i;
|
|
void *p, *k;
|
|
|
|
assert(m);
|
|
assert(f);
|
|
assert(uid_refs);
|
|
assert(field_name);
|
|
|
|
/* Serialize the UID reference table. Or actually, just the IPC destruction flag of it, as
|
|
* the actual counter of it is better rebuild after a reload/reexec. */
|
|
|
|
HASHMAP_FOREACH_KEY(p, k, *uid_refs, i) {
|
|
uint32_t c;
|
|
uid_t uid;
|
|
|
|
uid = PTR_TO_UID(k);
|
|
c = PTR_TO_UINT32(p);
|
|
|
|
if (!(c & DESTROY_IPC_FLAG))
|
|
continue;
|
|
|
|
(void) serialize_item_format(f, field_name, UID_FMT, uid);
|
|
}
|
|
}
|
|
|
|
static void manager_serialize_uid_refs(Manager *m, FILE *f) {
|
|
manager_serialize_uid_refs_internal(m, f, &m->uid_refs, "destroy-ipc-uid");
|
|
}
|
|
|
|
static void manager_serialize_gid_refs(Manager *m, FILE *f) {
|
|
manager_serialize_uid_refs_internal(m, f, &m->gid_refs, "destroy-ipc-gid");
|
|
}
|
|
|
|
int manager_serialize(
|
|
Manager *m,
|
|
FILE *f,
|
|
FDSet *fds,
|
|
bool switching_root) {
|
|
|
|
ManagerTimestamp q;
|
|
const char *t;
|
|
Iterator i;
|
|
Unit *u;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(f);
|
|
assert(fds);
|
|
|
|
_cleanup_(manager_reloading_stopp) _unused_ Manager *reloading = manager_reloading_start(m);
|
|
|
|
(void) serialize_item_format(f, "current-job-id", "%" PRIu32, m->current_job_id);
|
|
(void) serialize_item_format(f, "n-installed-jobs", "%u", m->n_installed_jobs);
|
|
(void) serialize_item_format(f, "n-failed-jobs", "%u", m->n_failed_jobs);
|
|
(void) serialize_bool(f, "taint-usr", m->taint_usr);
|
|
(void) serialize_bool(f, "ready-sent", m->ready_sent);
|
|
(void) serialize_bool(f, "taint-logged", m->taint_logged);
|
|
(void) serialize_bool(f, "service-watchdogs", m->service_watchdogs);
|
|
|
|
/* After switching root, udevd has not been started yet. So, enumeration results should not be emitted. */
|
|
(void) serialize_bool(f, "honor-device-enumeration", !switching_root);
|
|
|
|
if (m->show_status_overridden != _SHOW_STATUS_INVALID)
|
|
(void) serialize_item(f, "show-status-overridden",
|
|
show_status_to_string(m->show_status_overridden));
|
|
|
|
if (m->log_level_overridden)
|
|
(void) serialize_item_format(f, "log-level-override", "%i", log_get_max_level());
|
|
if (m->log_target_overridden)
|
|
(void) serialize_item(f, "log-target-override", log_target_to_string(log_get_target()));
|
|
|
|
(void) serialize_usec(f, "runtime-watchdog-overridden", m->watchdog_overridden[WATCHDOG_RUNTIME]);
|
|
(void) serialize_usec(f, "reboot-watchdog-overridden", m->watchdog_overridden[WATCHDOG_REBOOT]);
|
|
(void) serialize_usec(f, "kexec-watchdog-overridden", m->watchdog_overridden[WATCHDOG_KEXEC]);
|
|
|
|
for (q = 0; q < _MANAGER_TIMESTAMP_MAX; q++) {
|
|
_cleanup_free_ char *joined = NULL;
|
|
|
|
if (!manager_timestamp_shall_serialize(q))
|
|
continue;
|
|
|
|
joined = strjoin(manager_timestamp_to_string(q), "-timestamp");
|
|
if (!joined)
|
|
return log_oom();
|
|
|
|
(void) serialize_dual_timestamp(f, joined, m->timestamps + q);
|
|
}
|
|
|
|
if (!switching_root)
|
|
(void) serialize_strv(f, "env", m->client_environment);
|
|
|
|
if (m->notify_fd >= 0) {
|
|
r = serialize_fd(f, fds, "notify-fd", m->notify_fd);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) serialize_item(f, "notify-socket", m->notify_socket);
|
|
}
|
|
|
|
if (m->cgroups_agent_fd >= 0) {
|
|
r = serialize_fd(f, fds, "cgroups-agent-fd", m->cgroups_agent_fd);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (m->user_lookup_fds[0] >= 0) {
|
|
int copy0, copy1;
|
|
|
|
copy0 = fdset_put_dup(fds, m->user_lookup_fds[0]);
|
|
if (copy0 < 0)
|
|
return log_error_errno(copy0, "Failed to add user lookup fd to serialization: %m");
|
|
|
|
copy1 = fdset_put_dup(fds, m->user_lookup_fds[1]);
|
|
if (copy1 < 0)
|
|
return log_error_errno(copy1, "Failed to add user lookup fd to serialization: %m");
|
|
|
|
(void) serialize_item_format(f, "user-lookup", "%i %i", copy0, copy1);
|
|
}
|
|
|
|
bus_track_serialize(m->subscribed, f, "subscribed");
|
|
|
|
r = dynamic_user_serialize(m, f, fds);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
manager_serialize_uid_refs(m, f);
|
|
manager_serialize_gid_refs(m, f);
|
|
|
|
r = exec_runtime_serialize(m, f, fds);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(void) 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)
|
|
return r;
|
|
}
|
|
|
|
r = fflush_and_check(f);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to flush serialization: %m");
|
|
|
|
r = bus_fdset_add_all(m, fds);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to add bus sockets to serialization: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_deserialize_one_unit(Manager *m, const char *name, FILE *f, FDSet *fds) {
|
|
Unit *u;
|
|
int r;
|
|
|
|
r = manager_load_unit(m, name, NULL, NULL, &u);
|
|
if (r < 0) {
|
|
if (r == -ENOMEM)
|
|
return r;
|
|
return log_notice_errno(r, "Failed to load unit \"%s\", skipping deserialization: %m", name);
|
|
}
|
|
|
|
r = unit_deserialize(u, f, fds);
|
|
if (r < 0) {
|
|
if (r == -ENOMEM)
|
|
return r;
|
|
return log_notice_errno(r, "Failed to deserialize unit \"%s\", skipping: %m", name);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int manager_deserialize_units(Manager *m, FILE *f, FDSet *fds) {
|
|
const char *unit_name;
|
|
int r;
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *line = NULL;
|
|
/* Start marker */
|
|
r = read_line(f, LONG_LINE_MAX, &line);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read serialization line: %m");
|
|
if (r == 0)
|
|
break;
|
|
|
|
unit_name = strstrip(line);
|
|
|
|
r = manager_deserialize_one_unit(m, unit_name, f, fds);
|
|
if (r == -ENOMEM)
|
|
return r;
|
|
if (r < 0) {
|
|
r = unit_deserialize_skip(f);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
usec_t manager_get_watchdog(Manager *m, WatchdogType t) {
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_USER(m))
|
|
return USEC_INFINITY;
|
|
|
|
if (timestamp_is_set(m->watchdog_overridden[t]))
|
|
return m->watchdog_overridden[t];
|
|
|
|
return m->watchdog[t];
|
|
}
|
|
|
|
void manager_set_watchdog(Manager *m, WatchdogType t, usec_t timeout) {
|
|
int r = 0;
|
|
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_USER(m))
|
|
return;
|
|
|
|
if (m->watchdog[t] == timeout)
|
|
return;
|
|
|
|
if (t == WATCHDOG_RUNTIME)
|
|
if (!timestamp_is_set(m->watchdog_overridden[WATCHDOG_RUNTIME])) {
|
|
if (timestamp_is_set(timeout))
|
|
r = watchdog_set_timeout(&timeout);
|
|
else
|
|
watchdog_close(true);
|
|
}
|
|
|
|
if (r >= 0)
|
|
m->watchdog[t] = timeout;
|
|
}
|
|
|
|
int manager_set_watchdog_overridden(Manager *m, WatchdogType t, usec_t timeout) {
|
|
int r = 0;
|
|
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_USER(m))
|
|
return 0;
|
|
|
|
if (m->watchdog_overridden[t] == timeout)
|
|
return 0;
|
|
|
|
if (t == WATCHDOG_RUNTIME) {
|
|
usec_t *p;
|
|
|
|
p = timestamp_is_set(timeout) ? &timeout : &m->watchdog[t];
|
|
if (timestamp_is_set(*p))
|
|
r = watchdog_set_timeout(p);
|
|
else
|
|
watchdog_close(true);
|
|
}
|
|
|
|
if (r >= 0)
|
|
m->watchdog_overridden[t] = timeout;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void manager_deserialize_uid_refs_one_internal(
|
|
Manager *m,
|
|
Hashmap** uid_refs,
|
|
const char *value) {
|
|
|
|
uid_t uid;
|
|
uint32_t c;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(uid_refs);
|
|
assert(value);
|
|
|
|
r = parse_uid(value, &uid);
|
|
if (r < 0 || uid == 0) {
|
|
log_debug("Unable to parse UID reference serialization: " UID_FMT, uid);
|
|
return;
|
|
}
|
|
|
|
r = hashmap_ensure_allocated(uid_refs, &trivial_hash_ops);
|
|
if (r < 0) {
|
|
log_oom();
|
|
return;
|
|
}
|
|
|
|
c = PTR_TO_UINT32(hashmap_get(*uid_refs, UID_TO_PTR(uid)));
|
|
if (c & DESTROY_IPC_FLAG)
|
|
return;
|
|
|
|
c |= DESTROY_IPC_FLAG;
|
|
|
|
r = hashmap_replace(*uid_refs, UID_TO_PTR(uid), UINT32_TO_PTR(c));
|
|
if (r < 0) {
|
|
log_debug_errno(r, "Failed to add UID reference entry: %m");
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void manager_deserialize_uid_refs_one(Manager *m, const char *value) {
|
|
manager_deserialize_uid_refs_one_internal(m, &m->uid_refs, value);
|
|
}
|
|
|
|
static void manager_deserialize_gid_refs_one(Manager *m, const char *value) {
|
|
manager_deserialize_uid_refs_one_internal(m, &m->gid_refs, value);
|
|
}
|
|
|
|
int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
|
|
int r = 0;
|
|
|
|
assert(m);
|
|
assert(f);
|
|
|
|
log_debug("Deserializing state...");
|
|
|
|
/* If we are not in reload mode yet, enter it now. Not that this is recursive, a caller might already have
|
|
* increased it to non-zero, which is why we just increase it by one here and down again at the end of this
|
|
* call. */
|
|
_cleanup_(manager_reloading_stopp) _unused_ Manager *reloading = manager_reloading_start(m);
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *line = NULL;
|
|
const char *val, *l;
|
|
|
|
r = read_line(f, LONG_LINE_MAX, &line);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read serialization line: %m");
|
|
if (r == 0)
|
|
break;
|
|
|
|
l = strstrip(line);
|
|
if (isempty(l)) /* end marker */
|
|
break;
|
|
|
|
if ((val = startswith(l, "current-job-id="))) {
|
|
uint32_t id;
|
|
|
|
if (safe_atou32(val, &id) < 0)
|
|
log_notice("Failed to parse current job id value '%s', ignoring.", val);
|
|
else
|
|
m->current_job_id = MAX(m->current_job_id, id);
|
|
|
|
} else if ((val = startswith(l, "n-installed-jobs="))) {
|
|
uint32_t n;
|
|
|
|
if (safe_atou32(val, &n) < 0)
|
|
log_notice("Failed to parse installed jobs counter '%s', ignoring.", val);
|
|
else
|
|
m->n_installed_jobs += n;
|
|
|
|
} else if ((val = startswith(l, "n-failed-jobs="))) {
|
|
uint32_t n;
|
|
|
|
if (safe_atou32(val, &n) < 0)
|
|
log_notice("Failed to parse failed jobs counter '%s', ignoring.", val);
|
|
else
|
|
m->n_failed_jobs += n;
|
|
|
|
} else if ((val = startswith(l, "taint-usr="))) {
|
|
int b;
|
|
|
|
b = parse_boolean(val);
|
|
if (b < 0)
|
|
log_notice("Failed to parse taint /usr flag '%s', ignoring.", val);
|
|
else
|
|
m->taint_usr = m->taint_usr || b;
|
|
|
|
} else if ((val = startswith(l, "ready-sent="))) {
|
|
int b;
|
|
|
|
b = parse_boolean(val);
|
|
if (b < 0)
|
|
log_notice("Failed to parse ready-sent flag '%s', ignoring.", val);
|
|
else
|
|
m->ready_sent = m->ready_sent || b;
|
|
|
|
} else if ((val = startswith(l, "taint-logged="))) {
|
|
int b;
|
|
|
|
b = parse_boolean(val);
|
|
if (b < 0)
|
|
log_notice("Failed to parse taint-logged flag '%s', ignoring.", val);
|
|
else
|
|
m->taint_logged = m->taint_logged || b;
|
|
|
|
} else if ((val = startswith(l, "service-watchdogs="))) {
|
|
int b;
|
|
|
|
b = parse_boolean(val);
|
|
if (b < 0)
|
|
log_notice("Failed to parse service-watchdogs flag '%s', ignoring.", val);
|
|
else
|
|
m->service_watchdogs = b;
|
|
|
|
} else if ((val = startswith(l, "honor-device-enumeration="))) {
|
|
int b;
|
|
|
|
b = parse_boolean(val);
|
|
if (b < 0)
|
|
log_notice("Failed to parse honor-device-enumeration flag '%s', ignoring.", val);
|
|
else
|
|
m->honor_device_enumeration = b;
|
|
|
|
} else if ((val = startswith(l, "show-status-overridden="))) {
|
|
ShowStatus s;
|
|
|
|
s = show_status_from_string(val);
|
|
if (s < 0)
|
|
log_notice("Failed to parse show-status-overridden flag '%s', ignoring.", val);
|
|
else
|
|
manager_set_show_status_overridden(m, s, "deserialize");
|
|
|
|
} else if ((val = startswith(l, "log-level-override="))) {
|
|
int level;
|
|
|
|
level = log_level_from_string(val);
|
|
if (level < 0)
|
|
log_notice("Failed to parse log-level-override value '%s', ignoring.", val);
|
|
else
|
|
manager_override_log_level(m, level);
|
|
|
|
} else if ((val = startswith(l, "log-target-override="))) {
|
|
LogTarget target;
|
|
|
|
target = log_target_from_string(val);
|
|
if (target < 0)
|
|
log_notice("Failed to parse log-target-override value '%s', ignoring.", val);
|
|
else
|
|
manager_override_log_target(m, target);
|
|
|
|
} else if ((val = startswith(l, "runtime-watchdog-overridden="))) {
|
|
usec_t t;
|
|
|
|
if (deserialize_usec(val, &t) < 0)
|
|
log_notice("Failed to parse runtime-watchdog-overridden value '%s', ignoring.", val);
|
|
else
|
|
manager_set_watchdog_overridden(m, WATCHDOG_RUNTIME, t);
|
|
|
|
} else if ((val = startswith(l, "reboot-watchdog-overridden="))) {
|
|
usec_t t;
|
|
|
|
if (deserialize_usec(val, &t) < 0)
|
|
log_notice("Failed to parse reboot-watchdog-overridden value '%s', ignoring.", val);
|
|
else
|
|
manager_set_watchdog_overridden(m, WATCHDOG_REBOOT, t);
|
|
|
|
} else if ((val = startswith(l, "kexec-watchdog-overridden="))) {
|
|
usec_t t;
|
|
|
|
if (deserialize_usec(val, &t) < 0)
|
|
log_notice("Failed to parse kexec-watchdog-overridden value '%s', ignoring.", val);
|
|
else
|
|
manager_set_watchdog_overridden(m, WATCHDOG_KEXEC, t);
|
|
|
|
} else if (startswith(l, "env=")) {
|
|
r = deserialize_environment(l + 4, &m->client_environment);
|
|
if (r < 0)
|
|
log_notice_errno(r, "Failed to parse environment entry: \"%s\", ignoring: %m", l);
|
|
|
|
} else if ((val = startswith(l, "notify-fd="))) {
|
|
int fd;
|
|
|
|
if (safe_atoi(val, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
|
|
log_notice("Failed to parse notify fd, ignoring: \"%s\"", val);
|
|
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 ((val = startswith(l, "notify-socket="))) {
|
|
r = free_and_strdup(&m->notify_socket, val);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
} else if ((val = startswith(l, "cgroups-agent-fd="))) {
|
|
int fd;
|
|
|
|
if (safe_atoi(val, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
|
|
log_notice("Failed to parse cgroups agent fd, ignoring.: %s", val);
|
|
else {
|
|
m->cgroups_agent_event_source = sd_event_source_unref(m->cgroups_agent_event_source);
|
|
safe_close(m->cgroups_agent_fd);
|
|
m->cgroups_agent_fd = fdset_remove(fds, fd);
|
|
}
|
|
|
|
} else if ((val = startswith(l, "user-lookup="))) {
|
|
int fd0, fd1;
|
|
|
|
if (sscanf(val, "%i %i", &fd0, &fd1) != 2 || fd0 < 0 || fd1 < 0 || fd0 == fd1 || !fdset_contains(fds, fd0) || !fdset_contains(fds, fd1))
|
|
log_notice("Failed to parse user lookup fd, ignoring: %s", val);
|
|
else {
|
|
m->user_lookup_event_source = sd_event_source_unref(m->user_lookup_event_source);
|
|
safe_close_pair(m->user_lookup_fds);
|
|
m->user_lookup_fds[0] = fdset_remove(fds, fd0);
|
|
m->user_lookup_fds[1] = fdset_remove(fds, fd1);
|
|
}
|
|
|
|
} else if ((val = startswith(l, "dynamic-user=")))
|
|
dynamic_user_deserialize_one(m, val, fds);
|
|
else if ((val = startswith(l, "destroy-ipc-uid=")))
|
|
manager_deserialize_uid_refs_one(m, val);
|
|
else if ((val = startswith(l, "destroy-ipc-gid=")))
|
|
manager_deserialize_gid_refs_one(m, val);
|
|
else if ((val = startswith(l, "exec-runtime=")))
|
|
exec_runtime_deserialize_one(m, val, fds);
|
|
else if ((val = startswith(l, "subscribed="))) {
|
|
|
|
if (strv_extend(&m->deserialized_subscribed, val) < 0)
|
|
return -ENOMEM;
|
|
|
|
} else {
|
|
ManagerTimestamp q;
|
|
|
|
for (q = 0; q < _MANAGER_TIMESTAMP_MAX; q++) {
|
|
val = startswith(l, manager_timestamp_to_string(q));
|
|
if (!val)
|
|
continue;
|
|
|
|
val = startswith(val, "-timestamp=");
|
|
if (val)
|
|
break;
|
|
}
|
|
|
|
if (q < _MANAGER_TIMESTAMP_MAX) /* found it */
|
|
(void) deserialize_dual_timestamp(val, m->timestamps + q);
|
|
else if (!startswith(l, "kdbus-fd=")) /* ignore kdbus */
|
|
log_notice("Unknown serialization item '%s', ignoring.", l);
|
|
}
|
|
}
|
|
|
|
return manager_deserialize_units(m, f, fds);
|
|
}
|
|
|
|
int manager_reload(Manager *m) {
|
|
_cleanup_(manager_reloading_stopp) Manager *reloading = NULL;
|
|
_cleanup_fdset_free_ FDSet *fds = NULL;
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
r = manager_open_serialization(m, &f);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to create serialization file: %m");
|
|
|
|
fds = fdset_new();
|
|
if (!fds)
|
|
return log_oom();
|
|
|
|
/* We are officially in reload mode from here on. */
|
|
reloading = manager_reloading_start(m);
|
|
|
|
r = manager_serialize(m, f, fds, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (fseeko(f, 0, SEEK_SET) < 0)
|
|
return log_error_errno(errno, "Failed to seek to beginning of serialization: %m");
|
|
|
|
/* 💀 This is the point of no return, from here on there is no way back. 💀 */
|
|
reloading = NULL;
|
|
|
|
bus_manager_send_reloading(m, true);
|
|
|
|
/* Start by flushing out all jobs and units, all generated units, all runtime environments, all dynamic users
|
|
* and everything else that is worth flushing out. We'll get it all back from the serialization — if we need
|
|
* it.*/
|
|
|
|
manager_clear_jobs_and_units(m);
|
|
lookup_paths_flush_generator(&m->lookup_paths);
|
|
lookup_paths_free(&m->lookup_paths);
|
|
exec_runtime_vacuum(m);
|
|
dynamic_user_vacuum(m, false);
|
|
m->uid_refs = hashmap_free(m->uid_refs);
|
|
m->gid_refs = hashmap_free(m->gid_refs);
|
|
|
|
r = lookup_paths_init(&m->lookup_paths, m->unit_file_scope, 0, NULL);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to initialize path lookup table, ignoring: %m");
|
|
|
|
(void) manager_run_environment_generators(m);
|
|
(void) manager_run_generators(m);
|
|
|
|
lookup_paths_log(&m->lookup_paths);
|
|
|
|
/* We flushed out generated files, for which we don't watch mtime, so we should flush the old map. */
|
|
manager_free_unit_name_maps(m);
|
|
|
|
/* First, enumerate what we can from kernel and suchlike */
|
|
manager_enumerate_perpetual(m);
|
|
manager_enumerate(m);
|
|
|
|
/* Second, deserialize our stored data */
|
|
r = manager_deserialize(m, f, fds);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Deserialization failed, proceeding anyway: %m");
|
|
|
|
/* We don't need the serialization anymore */
|
|
f = safe_fclose(f);
|
|
|
|
/* Re-register notify_fd as event source, and set up other sockets/communication channels we might need */
|
|
(void) manager_setup_notify(m);
|
|
(void) manager_setup_cgroups_agent(m);
|
|
(void) manager_setup_user_lookup_fd(m);
|
|
|
|
/* Third, fire things up! */
|
|
manager_coldplug(m);
|
|
|
|
/* Clean up runtime objects no longer referenced */
|
|
manager_vacuum(m);
|
|
|
|
/* Consider the reload process complete now. */
|
|
assert(m->n_reloading > 0);
|
|
m->n_reloading--;
|
|
|
|
/* On manager reloading, device tag data should exists, thus, we should honor the results of device
|
|
* enumeration. The flag should be always set correctly by the serialized data, but it may fail. So,
|
|
* let's always set the flag here for safety. */
|
|
m->honor_device_enumeration = true;
|
|
|
|
manager_ready(m);
|
|
|
|
m->send_reloading_done = true;
|
|
return 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);
|
|
}
|
|
|
|
static void log_taint_string(Manager *m) {
|
|
_cleanup_free_ char *taint = NULL;
|
|
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_USER(m) || m->taint_logged)
|
|
return;
|
|
|
|
m->taint_logged = true; /* only check for taint once */
|
|
|
|
taint = manager_taint_string(m);
|
|
if (isempty(taint))
|
|
return;
|
|
|
|
log_struct(LOG_NOTICE,
|
|
LOG_MESSAGE("System is tainted: %s", taint),
|
|
"TAINT=%s", taint,
|
|
"MESSAGE_ID=" SD_MESSAGE_TAINTED_STR);
|
|
}
|
|
|
|
static void manager_notify_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;
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return;
|
|
|
|
if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0) {
|
|
char ts[FORMAT_TIMESPAN_MAX];
|
|
char buf[FORMAT_TIMESPAN_MAX + STRLEN(" (firmware) + ") + FORMAT_TIMESPAN_MAX + STRLEN(" (loader) + ")]
|
|
= {};
|
|
char *p = buf;
|
|
size_t size = sizeof buf;
|
|
|
|
/* Note that MANAGER_TIMESTAMP_KERNEL's monotonic value is always at 0, and
|
|
* MANAGER_TIMESTAMP_FIRMWARE's and MANAGER_TIMESTAMP_LOADER's monotonic value should be considered
|
|
* negative values. */
|
|
|
|
firmware_usec = m->timestamps[MANAGER_TIMESTAMP_FIRMWARE].monotonic - m->timestamps[MANAGER_TIMESTAMP_LOADER].monotonic;
|
|
loader_usec = m->timestamps[MANAGER_TIMESTAMP_LOADER].monotonic - m->timestamps[MANAGER_TIMESTAMP_KERNEL].monotonic;
|
|
userspace_usec = m->timestamps[MANAGER_TIMESTAMP_FINISH].monotonic - m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic;
|
|
total_usec = m->timestamps[MANAGER_TIMESTAMP_FIRMWARE].monotonic + m->timestamps[MANAGER_TIMESTAMP_FINISH].monotonic;
|
|
|
|
if (firmware_usec > 0)
|
|
size = strpcpyf(&p, size, "%s (firmware) + ", format_timespan(ts, sizeof(ts), firmware_usec, USEC_PER_MSEC));
|
|
if (loader_usec > 0)
|
|
size = strpcpyf(&p, size, "%s (loader) + ", format_timespan(ts, sizeof(ts), loader_usec, USEC_PER_MSEC));
|
|
|
|
if (dual_timestamp_is_set(&m->timestamps[MANAGER_TIMESTAMP_INITRD])) {
|
|
|
|
/* The initrd case on bare-metal*/
|
|
kernel_usec = m->timestamps[MANAGER_TIMESTAMP_INITRD].monotonic - m->timestamps[MANAGER_TIMESTAMP_KERNEL].monotonic;
|
|
initrd_usec = m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic - m->timestamps[MANAGER_TIMESTAMP_INITRD].monotonic;
|
|
|
|
log_struct(LOG_INFO,
|
|
"MESSAGE_ID=" SD_MESSAGE_STARTUP_FINISHED_STR,
|
|
"KERNEL_USEC="USEC_FMT, kernel_usec,
|
|
"INITRD_USEC="USEC_FMT, initrd_usec,
|
|
"USERSPACE_USEC="USEC_FMT, userspace_usec,
|
|
LOG_MESSAGE("Startup finished in %s%s (kernel) + %s (initrd) + %s (userspace) = %s.",
|
|
buf,
|
|
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)));
|
|
} else {
|
|
/* The initrd-less case on bare-metal*/
|
|
|
|
kernel_usec = m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic - m->timestamps[MANAGER_TIMESTAMP_KERNEL].monotonic;
|
|
initrd_usec = 0;
|
|
|
|
log_struct(LOG_INFO,
|
|
"MESSAGE_ID=" SD_MESSAGE_STARTUP_FINISHED_STR,
|
|
"KERNEL_USEC="USEC_FMT, kernel_usec,
|
|
"USERSPACE_USEC="USEC_FMT, userspace_usec,
|
|
LOG_MESSAGE("Startup finished in %s%s (kernel) + %s (userspace) = %s.",
|
|
buf,
|
|
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)));
|
|
}
|
|
} else {
|
|
/* The container and --user case */
|
|
firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
|
|
total_usec = userspace_usec = m->timestamps[MANAGER_TIMESTAMP_FINISH].monotonic - m->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic;
|
|
|
|
log_struct(LOG_INFO,
|
|
"MESSAGE_ID=" SD_MESSAGE_USER_STARTUP_FINISHED_STR,
|
|
"USERSPACE_USEC="USEC_FMT, userspace_usec,
|
|
LOG_MESSAGE("Startup finished in %s.",
|
|
format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)));
|
|
}
|
|
|
|
bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);
|
|
|
|
sd_notifyf(false,
|
|
m->ready_sent ? "STATUS=Startup finished in %s."
|
|
: "READY=1\n"
|
|
"STATUS=Startup finished in %s.",
|
|
format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC));
|
|
m->ready_sent = true;
|
|
|
|
log_taint_string(m);
|
|
}
|
|
|
|
static void manager_send_ready(Manager *m) {
|
|
assert(m);
|
|
|
|
/* We send READY=1 on reaching basic.target only when running in --user mode. */
|
|
if (!MANAGER_IS_USER(m) || m->ready_sent)
|
|
return;
|
|
|
|
m->ready_sent = true;
|
|
|
|
sd_notifyf(false,
|
|
"READY=1\n"
|
|
"STATUS=Reached " SPECIAL_BASIC_TARGET ".");
|
|
}
|
|
|
|
static void manager_check_basic_target(Manager *m) {
|
|
Unit *u;
|
|
|
|
assert(m);
|
|
|
|
/* Small shortcut */
|
|
if (m->ready_sent && m->taint_logged)
|
|
return;
|
|
|
|
u = manager_get_unit(m, SPECIAL_BASIC_TARGET);
|
|
if (!u || !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u)))
|
|
return;
|
|
|
|
/* For user managers, send out READY=1 as soon as we reach basic.target */
|
|
manager_send_ready(m);
|
|
|
|
/* Log the taint string as soon as we reach basic.target */
|
|
log_taint_string(m);
|
|
}
|
|
|
|
void manager_check_finished(Manager *m) {
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_RELOADING(m))
|
|
return;
|
|
|
|
/* Verify that we have entered the event loop already, and not left it again. */
|
|
if (!MANAGER_IS_RUNNING(m))
|
|
return;
|
|
|
|
manager_check_basic_target(m);
|
|
|
|
if (hashmap_size(m->jobs) > 0) {
|
|
if (m->jobs_in_progress_event_source)
|
|
/* Ignore any failure, this is only for feedback */
|
|
(void) sd_event_source_set_time(m->jobs_in_progress_event_source,
|
|
manager_watch_jobs_next_time(m));
|
|
return;
|
|
}
|
|
|
|
/* The jobs hashmap tends to grow a lot during boot, and then it's not reused until shutdown. Let's
|
|
kill the hashmap if it is relatively large. */
|
|
if (hashmap_buckets(m->jobs) > hashmap_size(m->units) / 10)
|
|
m->jobs = hashmap_free(m->jobs);
|
|
|
|
manager_flip_auto_status(m, false, "boot finished");
|
|
|
|
/* Notify Type=idle units that we are done now */
|
|
manager_close_idle_pipe(m);
|
|
|
|
/* Turn off confirm spawn now */
|
|
m->confirm_spawn = NULL;
|
|
|
|
/* No need to update ask password status when we're going non-interactive */
|
|
manager_close_ask_password(m);
|
|
|
|
/* This is no longer the first boot */
|
|
manager_set_first_boot(m, false);
|
|
|
|
if (MANAGER_IS_FINISHED(m))
|
|
return;
|
|
|
|
dual_timestamp_get(m->timestamps + MANAGER_TIMESTAMP_FINISH);
|
|
|
|
manager_notify_finished(m);
|
|
|
|
manager_invalidate_startup_units(m);
|
|
}
|
|
|
|
static bool generator_path_any(const char* const* paths) {
|
|
char **path;
|
|
bool found = false;
|
|
|
|
/* Optimize by skipping the whole process by not creating output directories
|
|
* if no generators are found. */
|
|
STRV_FOREACH(path, (char**) paths)
|
|
if (access(*path, F_OK) == 0)
|
|
found = true;
|
|
else if (errno != ENOENT)
|
|
log_warning_errno(errno, "Failed to open generator directory %s: %m", *path);
|
|
|
|
return found;
|
|
}
|
|
|
|
static int manager_run_environment_generators(Manager *m) {
|
|
char **tmp = NULL; /* this is only used in the forked process, no cleanup here */
|
|
_cleanup_strv_free_ char **paths = NULL;
|
|
void* args[] = {
|
|
[STDOUT_GENERATE] = &tmp,
|
|
[STDOUT_COLLECT] = &tmp,
|
|
[STDOUT_CONSUME] = &m->transient_environment,
|
|
};
|
|
int r;
|
|
|
|
if (MANAGER_IS_TEST_RUN(m) && !(m->test_run_flags & MANAGER_TEST_RUN_ENV_GENERATORS))
|
|
return 0;
|
|
|
|
paths = env_generator_binary_paths(MANAGER_IS_SYSTEM(m));
|
|
if (!paths)
|
|
return log_oom();
|
|
|
|
if (!generator_path_any((const char* const*) paths))
|
|
return 0;
|
|
|
|
RUN_WITH_UMASK(0022)
|
|
r = execute_directories((const char* const*) paths, DEFAULT_TIMEOUT_USEC, gather_environment,
|
|
args, NULL, m->transient_environment, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
|
|
return r;
|
|
}
|
|
|
|
static int manager_run_generators(Manager *m) {
|
|
_cleanup_strv_free_ char **paths = NULL;
|
|
const char *argv[5];
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_TEST_RUN(m) && !(m->test_run_flags & MANAGER_TEST_RUN_GENERATORS))
|
|
return 0;
|
|
|
|
paths = generator_binary_paths(m->unit_file_scope);
|
|
if (!paths)
|
|
return log_oom();
|
|
|
|
if (!generator_path_any((const char* const*) paths))
|
|
return 0;
|
|
|
|
r = lookup_paths_mkdir_generator(&m->lookup_paths);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to create generator directories: %m");
|
|
goto finish;
|
|
}
|
|
|
|
argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
|
|
argv[1] = m->lookup_paths.generator;
|
|
argv[2] = m->lookup_paths.generator_early;
|
|
argv[3] = m->lookup_paths.generator_late;
|
|
argv[4] = NULL;
|
|
|
|
RUN_WITH_UMASK(0022)
|
|
(void) execute_directories((const char* const*) paths, DEFAULT_TIMEOUT_USEC, NULL, NULL,
|
|
(char**) argv, m->transient_environment, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
|
|
|
|
r = 0;
|
|
|
|
finish:
|
|
lookup_paths_trim_generator(&m->lookup_paths);
|
|
return r;
|
|
}
|
|
|
|
int manager_transient_environment_add(Manager *m, char **plus) {
|
|
char **a;
|
|
|
|
assert(m);
|
|
|
|
if (strv_isempty(plus))
|
|
return 0;
|
|
|
|
a = strv_env_merge(2, m->transient_environment, plus);
|
|
if (!a)
|
|
return log_oom();
|
|
|
|
sanitize_environment(a);
|
|
|
|
return strv_free_and_replace(m->transient_environment, a);
|
|
}
|
|
|
|
int manager_client_environment_modify(
|
|
Manager *m,
|
|
char **minus,
|
|
char **plus) {
|
|
|
|
char **a = NULL, **b = NULL, **l;
|
|
|
|
assert(m);
|
|
|
|
if (strv_isempty(minus) && strv_isempty(plus))
|
|
return 0;
|
|
|
|
l = m->client_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) {
|
|
strv_free(a);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
l = b;
|
|
}
|
|
|
|
if (m->client_environment != l)
|
|
strv_free(m->client_environment);
|
|
|
|
if (a != l)
|
|
strv_free(a);
|
|
if (b != l)
|
|
strv_free(b);
|
|
|
|
m->client_environment = sanitize_environment(l);
|
|
return 0;
|
|
}
|
|
|
|
int manager_get_effective_environment(Manager *m, char ***ret) {
|
|
char **l;
|
|
|
|
assert(m);
|
|
assert(ret);
|
|
|
|
l = strv_env_merge(2, m->transient_environment, m->client_environment);
|
|
if (!l)
|
|
return -ENOMEM;
|
|
|
|
*ret = l;
|
|
return 0;
|
|
}
|
|
|
|
int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
|
|
int i;
|
|
|
|
assert(m);
|
|
|
|
for (i = 0; i < _RLIMIT_MAX; i++) {
|
|
m->rlimit[i] = mfree(m->rlimit[i]);
|
|
|
|
if (!default_rlimit[i])
|
|
continue;
|
|
|
|
m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
|
|
if (!m->rlimit[i])
|
|
return log_oom();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void manager_recheck_dbus(Manager *m) {
|
|
assert(m);
|
|
|
|
/* Connects to the bus if the dbus service and socket are running. If we are running in user mode this is all
|
|
* it does. In system mode we'll also connect to the system bus (which will most likely just reuse the
|
|
* connection of the API bus). That's because the system bus after all runs as service of the system instance,
|
|
* while in the user instance we can assume it's already there. */
|
|
|
|
if (MANAGER_IS_RELOADING(m))
|
|
return; /* don't check while we are reloading… */
|
|
|
|
if (manager_dbus_is_running(m, false)) {
|
|
(void) bus_init_api(m);
|
|
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
(void) bus_init_system(m);
|
|
} else {
|
|
(void) bus_done_api(m);
|
|
|
|
if (MANAGER_IS_SYSTEM(m))
|
|
(void) bus_done_system(m);
|
|
}
|
|
}
|
|
|
|
static bool manager_journal_is_running(Manager *m) {
|
|
Unit *u;
|
|
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_TEST_RUN(m))
|
|
return false;
|
|
|
|
/* If we are the user manager we can safely assume that the journal is up */
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return true;
|
|
|
|
/* Check that the socket is not only up, but in RUNNING state */
|
|
u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
|
|
if (!u)
|
|
return false;
|
|
if (SOCKET(u)->state != SOCKET_RUNNING)
|
|
return false;
|
|
|
|
/* Similar, check if the daemon itself is fully up, too */
|
|
u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
|
|
if (!u)
|
|
return false;
|
|
if (!IN_SET(SERVICE(u)->state, SERVICE_RELOAD, SERVICE_RUNNING))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void disable_printk_ratelimit(void) {
|
|
/* Disable kernel's printk ratelimit.
|
|
*
|
|
* Logging to /dev/kmsg is most useful during early boot and shutdown, where normal logging
|
|
* mechanisms are not available. The semantics of this sysctl are such that any kernel command-line
|
|
* setting takes precedence. */
|
|
int r;
|
|
|
|
r = sysctl_write("kernel/printk_devkmsg", "on");
|
|
if (r < 0)
|
|
log_debug_errno(r, "Failed to set sysctl kernel.printk_devkmsg=on: %m");
|
|
}
|
|
|
|
void manager_recheck_journal(Manager *m) {
|
|
|
|
assert(m);
|
|
|
|
/* Don't bother with this unless we are in the special situation of being PID 1 */
|
|
if (getpid_cached() != 1)
|
|
return;
|
|
|
|
/* Don't check this while we are reloading, things might still change */
|
|
if (MANAGER_IS_RELOADING(m))
|
|
return;
|
|
|
|
/* The journal is fully and entirely up? If so, let's permit logging to it, if that's configured. If the
|
|
* journal is down, don't ever log to it, otherwise we might end up deadlocking ourselves as we might trigger
|
|
* an activation ourselves we can't fulfill. */
|
|
log_set_prohibit_ipc(!manager_journal_is_running(m));
|
|
log_open();
|
|
}
|
|
|
|
static ShowStatus manager_get_show_status(Manager *m) {
|
|
assert(m);
|
|
|
|
if (MANAGER_IS_USER(m))
|
|
return _SHOW_STATUS_INVALID;
|
|
|
|
if (m->show_status_overridden != _SHOW_STATUS_INVALID)
|
|
return m->show_status_overridden;
|
|
|
|
return m->show_status;
|
|
}
|
|
|
|
bool manager_get_show_status_on(Manager *m) {
|
|
assert(m);
|
|
|
|
return show_status_on(manager_get_show_status(m));
|
|
}
|
|
|
|
void manager_set_show_status(Manager *m, ShowStatus mode, const char *reason) {
|
|
assert(m);
|
|
assert(reason);
|
|
assert(mode >= 0 && mode < _SHOW_STATUS_MAX);
|
|
|
|
if (MANAGER_IS_USER(m))
|
|
return;
|
|
|
|
if (mode == m->show_status)
|
|
return;
|
|
|
|
if (m->show_status_overridden == _SHOW_STATUS_INVALID) {
|
|
bool enabled;
|
|
|
|
enabled = show_status_on(mode);
|
|
log_debug("%s (%s) showing of status (%s).",
|
|
enabled ? "Enabling" : "Disabling",
|
|
strna(show_status_to_string(mode)),
|
|
reason);
|
|
|
|
if (enabled)
|
|
(void) touch("/run/systemd/show-status");
|
|
else
|
|
(void) unlink("/run/systemd/show-status");
|
|
}
|
|
|
|
m->show_status = mode;
|
|
}
|
|
|
|
void manager_set_show_status_overridden(Manager *m, ShowStatus mode, const char *reason) {
|
|
assert(m);
|
|
assert(mode < _SHOW_STATUS_MAX);
|
|
|
|
if (MANAGER_IS_USER(m))
|
|
return;
|
|
|
|
if (mode == m->show_status_overridden)
|
|
return;
|
|
|
|
m->show_status_overridden = mode;
|
|
|
|
if (mode == _SHOW_STATUS_INVALID)
|
|
mode = m->show_status;
|
|
|
|
log_debug("%s (%s) showing of status (%s).",
|
|
m->show_status_overridden != _SHOW_STATUS_INVALID ? "Overriding" : "Restoring",
|
|
strna(show_status_to_string(mode)),
|
|
reason);
|
|
|
|
if (show_status_on(mode))
|
|
(void) touch("/run/systemd/show-status");
|
|
else
|
|
(void) unlink("/run/systemd/show-status");
|
|
|
|
}
|
|
|
|
const char *manager_get_confirm_spawn(Manager *m) {
|
|
static int last_errno = 0;
|
|
struct stat st;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
/* Here's the deal: we want to test the validity of the console but don't want
|
|
* PID1 to go through the whole console process which might block. But we also
|
|
* want to warn the user only once if something is wrong with the console so we
|
|
* cannot do the sanity checks after spawning our children. So here we simply do
|
|
* really basic tests to hopefully trap common errors.
|
|
*
|
|
* If the console suddenly disappear at the time our children will really it
|
|
* then they will simply fail to acquire it and a positive answer will be
|
|
* assumed. New children will fallback to /dev/console though.
|
|
*
|
|
* Note: TTYs are devices that can come and go any time, and frequently aren't
|
|
* available yet during early boot (consider a USB rs232 dongle...). If for any
|
|
* reason the configured console is not ready, we fallback to the default
|
|
* console. */
|
|
|
|
if (!m->confirm_spawn || path_equal(m->confirm_spawn, "/dev/console"))
|
|
return m->confirm_spawn;
|
|
|
|
if (stat(m->confirm_spawn, &st) < 0) {
|
|
r = -errno;
|
|
goto fail;
|
|
}
|
|
|
|
if (!S_ISCHR(st.st_mode)) {
|
|
r = -ENOTTY;
|
|
goto fail;
|
|
}
|
|
|
|
last_errno = 0;
|
|
return m->confirm_spawn;
|
|
|
|
fail:
|
|
if (last_errno != r)
|
|
last_errno = log_warning_errno(r, "Failed to open %s, using default console: %m", m->confirm_spawn);
|
|
|
|
return "/dev/console";
|
|
}
|
|
|
|
void manager_set_first_boot(Manager *m, bool b) {
|
|
assert(m);
|
|
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return;
|
|
|
|
if (m->first_boot != (int) b) {
|
|
if (b)
|
|
(void) touch("/run/systemd/first-boot");
|
|
else
|
|
(void) unlink("/run/systemd/first-boot");
|
|
}
|
|
|
|
m->first_boot = b;
|
|
}
|
|
|
|
void manager_disable_confirm_spawn(void) {
|
|
(void) touch("/run/systemd/confirm_spawn_disabled");
|
|
}
|
|
|
|
bool manager_is_confirm_spawn_disabled(Manager *m) {
|
|
if (!m->confirm_spawn)
|
|
return true;
|
|
|
|
return access("/run/systemd/confirm_spawn_disabled", F_OK) >= 0;
|
|
}
|
|
|
|
static bool manager_should_show_status(Manager *m, StatusType type) {
|
|
assert(m);
|
|
|
|
if (!MANAGER_IS_SYSTEM(m))
|
|
return false;
|
|
|
|
if (m->no_console_output)
|
|
return false;
|
|
|
|
if (!IN_SET(manager_state(m), MANAGER_INITIALIZING, MANAGER_STARTING, MANAGER_STOPPING))
|
|
return false;
|
|
|
|
/* If we cannot find out the status properly, just proceed. */
|
|
if (type != STATUS_TYPE_EMERGENCY && manager_check_ask_password(m) > 0)
|
|
return false;
|
|
|
|
if (type == STATUS_TYPE_NOTICE && m->show_status != SHOW_STATUS_NO)
|
|
return true;
|
|
|
|
return manager_get_show_status_on(m);
|
|
}
|
|
|
|
void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) {
|
|
va_list ap;
|
|
|
|
/* If m is NULL, assume we're after shutdown and let the messages through. */
|
|
|
|
if (m && !manager_should_show_status(m, type))
|
|
return;
|
|
|
|
/* XXX We should totally drop the check for ephemeral here
|
|
* and thus effectively make 'Type=idle' pointless. */
|
|
if (type == STATUS_TYPE_EPHEMERAL && m && m->n_on_console > 0)
|
|
return;
|
|
|
|
va_start(ap, format);
|
|
status_vprintf(status, SHOW_STATUS_ELLIPSIZE|(type == STATUS_TYPE_EPHEMERAL ? SHOW_STATUS_EPHEMERAL : 0), format, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
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_simplify(p, false);
|
|
|
|
return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p);
|
|
}
|
|
|
|
int manager_update_failed_units(Manager *m, Unit *u, bool failed) {
|
|
unsigned size;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(u->manager == m);
|
|
|
|
size = set_size(m->failed_units);
|
|
|
|
if (failed) {
|
|
r = set_ensure_allocated(&m->failed_units, NULL);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
if (set_put(m->failed_units, u) < 0)
|
|
return log_oom();
|
|
} else
|
|
(void) set_remove(m->failed_units, u);
|
|
|
|
if (set_size(m->failed_units) != size)
|
|
bus_manager_send_change_signal(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
ManagerState manager_state(Manager *m) {
|
|
Unit *u;
|
|
|
|
assert(m);
|
|
|
|
/* Is the special shutdown target active or queued? If so, we are in shutdown state */
|
|
u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
|
|
if (u && unit_active_or_pending(u))
|
|
return MANAGER_STOPPING;
|
|
|
|
/* Did we ever finish booting? If not then we are still starting up */
|
|
if (!MANAGER_IS_FINISHED(m)) {
|
|
|
|
u = manager_get_unit(m, SPECIAL_BASIC_TARGET);
|
|
if (!u || !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u)))
|
|
return MANAGER_INITIALIZING;
|
|
|
|
return MANAGER_STARTING;
|
|
}
|
|
|
|
if (MANAGER_IS_SYSTEM(m)) {
|
|
/* 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_active_or_pending(u))
|
|
return MANAGER_MAINTENANCE;
|
|
|
|
u = manager_get_unit(m, SPECIAL_EMERGENCY_TARGET);
|
|
if (u && unit_active_or_pending(u))
|
|
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 void manager_unref_uid_internal(
|
|
Manager *m,
|
|
Hashmap **uid_refs,
|
|
uid_t uid,
|
|
bool destroy_now,
|
|
int (*_clean_ipc)(uid_t uid)) {
|
|
|
|
uint32_t c, n;
|
|
|
|
assert(m);
|
|
assert(uid_refs);
|
|
assert(uid_is_valid(uid));
|
|
assert(_clean_ipc);
|
|
|
|
/* A generic implementation, covering both manager_unref_uid() and manager_unref_gid(), under the assumption
|
|
* that uid_t and gid_t are actually defined the same way, with the same validity rules.
|
|
*
|
|
* We store a hashmap where the UID/GID is they key and the value is a 32bit reference counter, whose highest
|
|
* bit is used as flag for marking UIDs/GIDs whose IPC objects to remove when the last reference to the UID/GID
|
|
* is dropped. The flag is set to on, once at least one reference from a unit where RemoveIPC= is set is added
|
|
* on a UID/GID. It is reset when the UID's/GID's reference counter drops to 0 again. */
|
|
|
|
assert_cc(sizeof(uid_t) == sizeof(gid_t));
|
|
assert_cc(UID_INVALID == (uid_t) GID_INVALID);
|
|
|
|
if (uid == 0) /* We don't keep track of root, and will never destroy it */
|
|
return;
|
|
|
|
c = PTR_TO_UINT32(hashmap_get(*uid_refs, UID_TO_PTR(uid)));
|
|
|
|
n = c & ~DESTROY_IPC_FLAG;
|
|
assert(n > 0);
|
|
n--;
|
|
|
|
if (destroy_now && n == 0) {
|
|
hashmap_remove(*uid_refs, UID_TO_PTR(uid));
|
|
|
|
if (c & DESTROY_IPC_FLAG) {
|
|
log_debug("%s " UID_FMT " is no longer referenced, cleaning up its IPC.",
|
|
_clean_ipc == clean_ipc_by_uid ? "UID" : "GID",
|
|
uid);
|
|
(void) _clean_ipc(uid);
|
|
}
|
|
} else {
|
|
c = n | (c & DESTROY_IPC_FLAG);
|
|
assert_se(hashmap_update(*uid_refs, UID_TO_PTR(uid), UINT32_TO_PTR(c)) >= 0);
|
|
}
|
|
}
|
|
|
|
void manager_unref_uid(Manager *m, uid_t uid, bool destroy_now) {
|
|
manager_unref_uid_internal(m, &m->uid_refs, uid, destroy_now, clean_ipc_by_uid);
|
|
}
|
|
|
|
void manager_unref_gid(Manager *m, gid_t gid, bool destroy_now) {
|
|
manager_unref_uid_internal(m, &m->gid_refs, (uid_t) gid, destroy_now, clean_ipc_by_gid);
|
|
}
|
|
|
|
static int manager_ref_uid_internal(
|
|
Manager *m,
|
|
Hashmap **uid_refs,
|
|
uid_t uid,
|
|
bool clean_ipc) {
|
|
|
|
uint32_t c, n;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(uid_refs);
|
|
assert(uid_is_valid(uid));
|
|
|
|
/* A generic implementation, covering both manager_ref_uid() and manager_ref_gid(), under the assumption
|
|
* that uid_t and gid_t are actually defined the same way, with the same validity rules. */
|
|
|
|
assert_cc(sizeof(uid_t) == sizeof(gid_t));
|
|
assert_cc(UID_INVALID == (uid_t) GID_INVALID);
|
|
|
|
if (uid == 0) /* We don't keep track of root, and will never destroy it */
|
|
return 0;
|
|
|
|
r = hashmap_ensure_allocated(uid_refs, &trivial_hash_ops);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
c = PTR_TO_UINT32(hashmap_get(*uid_refs, UID_TO_PTR(uid)));
|
|
|
|
n = c & ~DESTROY_IPC_FLAG;
|
|
n++;
|
|
|
|
if (n & DESTROY_IPC_FLAG) /* check for overflow */
|
|
return -EOVERFLOW;
|
|
|
|
c = n | (c & DESTROY_IPC_FLAG) | (clean_ipc ? DESTROY_IPC_FLAG : 0);
|
|
|
|
return hashmap_replace(*uid_refs, UID_TO_PTR(uid), UINT32_TO_PTR(c));
|
|
}
|
|
|
|
int manager_ref_uid(Manager *m, uid_t uid, bool clean_ipc) {
|
|
return manager_ref_uid_internal(m, &m->uid_refs, uid, clean_ipc);
|
|
}
|
|
|
|
int manager_ref_gid(Manager *m, gid_t gid, bool clean_ipc) {
|
|
return manager_ref_uid_internal(m, &m->gid_refs, (uid_t) gid, clean_ipc);
|
|
}
|
|
|
|
static void manager_vacuum_uid_refs_internal(
|
|
Manager *m,
|
|
Hashmap **uid_refs,
|
|
int (*_clean_ipc)(uid_t uid)) {
|
|
|
|
Iterator i;
|
|
void *p, *k;
|
|
|
|
assert(m);
|
|
assert(uid_refs);
|
|
assert(_clean_ipc);
|
|
|
|
HASHMAP_FOREACH_KEY(p, k, *uid_refs, i) {
|
|
uint32_t c, n;
|
|
uid_t uid;
|
|
|
|
uid = PTR_TO_UID(k);
|
|
c = PTR_TO_UINT32(p);
|
|
|
|
n = c & ~DESTROY_IPC_FLAG;
|
|
if (n > 0)
|
|
continue;
|
|
|
|
if (c & DESTROY_IPC_FLAG) {
|
|
log_debug("Found unreferenced %s " UID_FMT " after reload/reexec. Cleaning up.",
|
|
_clean_ipc == clean_ipc_by_uid ? "UID" : "GID",
|
|
uid);
|
|
(void) _clean_ipc(uid);
|
|
}
|
|
|
|
assert_se(hashmap_remove(*uid_refs, k) == p);
|
|
}
|
|
}
|
|
|
|
static void manager_vacuum_uid_refs(Manager *m) {
|
|
manager_vacuum_uid_refs_internal(m, &m->uid_refs, clean_ipc_by_uid);
|
|
}
|
|
|
|
static void manager_vacuum_gid_refs(Manager *m) {
|
|
manager_vacuum_uid_refs_internal(m, &m->gid_refs, clean_ipc_by_gid);
|
|
}
|
|
|
|
static void manager_vacuum(Manager *m) {
|
|
assert(m);
|
|
|
|
/* Release any dynamic users no longer referenced */
|
|
dynamic_user_vacuum(m, true);
|
|
|
|
/* Release any references to UIDs/GIDs no longer referenced, and destroy any IPC owned by them */
|
|
manager_vacuum_uid_refs(m);
|
|
manager_vacuum_gid_refs(m);
|
|
|
|
/* Release any runtimes no longer referenced */
|
|
exec_runtime_vacuum(m);
|
|
}
|
|
|
|
int manager_dispatch_user_lookup_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
|
|
struct buffer {
|
|
uid_t uid;
|
|
gid_t gid;
|
|
char unit_name[UNIT_NAME_MAX+1];
|
|
} _packed_ buffer;
|
|
|
|
Manager *m = userdata;
|
|
ssize_t l;
|
|
size_t n;
|
|
Unit *u;
|
|
|
|
assert_se(source);
|
|
assert_se(m);
|
|
|
|
/* Invoked whenever a child process succeeded resolving its user/group to use and sent us the resulting UID/GID
|
|
* in a datagram. We parse the datagram here and pass it off to the unit, so that it can add a reference to the
|
|
* UID/GID so that it can destroy the UID/GID's IPC objects when the reference counter drops to 0. */
|
|
|
|
l = recv(fd, &buffer, sizeof(buffer), MSG_DONTWAIT);
|
|
if (l < 0) {
|
|
if (IN_SET(errno, EINTR, EAGAIN))
|
|
return 0;
|
|
|
|
return log_error_errno(errno, "Failed to read from user lookup fd: %m");
|
|
}
|
|
|
|
if ((size_t) l <= offsetof(struct buffer, unit_name)) {
|
|
log_warning("Received too short user lookup message, ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
if ((size_t) l > offsetof(struct buffer, unit_name) + UNIT_NAME_MAX) {
|
|
log_warning("Received too long user lookup message, ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
if (!uid_is_valid(buffer.uid) && !gid_is_valid(buffer.gid)) {
|
|
log_warning("Got user lookup message with invalid UID/GID pair, ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
n = (size_t) l - offsetof(struct buffer, unit_name);
|
|
if (memchr(buffer.unit_name, 0, n)) {
|
|
log_warning("Received lookup message with embedded NUL character, ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
buffer.unit_name[n] = 0;
|
|
u = manager_get_unit(m, buffer.unit_name);
|
|
if (!u) {
|
|
log_debug("Got user lookup message but unit doesn't exist, ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
log_unit_debug(u, "User lookup succeeded: uid=" UID_FMT " gid=" GID_FMT, buffer.uid, buffer.gid);
|
|
|
|
unit_notify_user_lookup(u, buffer.uid, buffer.gid);
|
|
return 0;
|
|
}
|
|
|
|
char *manager_taint_string(Manager *m) {
|
|
_cleanup_free_ char *destination = NULL, *overflowuid = NULL, *overflowgid = NULL;
|
|
char *buf, *e;
|
|
int r;
|
|
|
|
/* Returns a "taint string", e.g. "local-hwclock:var-run-bad".
|
|
* Only things that are detected at runtime should be tagged
|
|
* here. For stuff that is set during compilation, emit a warning
|
|
* in the configuration phase. */
|
|
|
|
assert(m);
|
|
|
|
buf = new(char, sizeof("split-usr:"
|
|
"cgroups-missing:"
|
|
"local-hwclock:"
|
|
"var-run-bad:"
|
|
"overflowuid-not-65534:"
|
|
"overflowgid-not-65534:"));
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
e = buf;
|
|
buf[0] = 0;
|
|
|
|
if (m->taint_usr)
|
|
e = stpcpy(e, "split-usr:");
|
|
|
|
if (access("/proc/cgroups", F_OK) < 0)
|
|
e = stpcpy(e, "cgroups-missing:");
|
|
|
|
if (clock_is_localtime(NULL) > 0)
|
|
e = stpcpy(e, "local-hwclock:");
|
|
|
|
r = readlink_malloc("/var/run", &destination);
|
|
if (r < 0 || !PATH_IN_SET(destination, "../run", "/run"))
|
|
e = stpcpy(e, "var-run-bad:");
|
|
|
|
r = read_one_line_file("/proc/sys/kernel/overflowuid", &overflowuid);
|
|
if (r >= 0 && !streq(overflowuid, "65534"))
|
|
e = stpcpy(e, "overflowuid-not-65534:");
|
|
|
|
r = read_one_line_file("/proc/sys/kernel/overflowgid", &overflowgid);
|
|
if (r >= 0 && !streq(overflowgid, "65534"))
|
|
e = stpcpy(e, "overflowgid-not-65534:");
|
|
|
|
/* remove the last ':' */
|
|
if (e != buf)
|
|
e[-1] = 0;
|
|
|
|
return buf;
|
|
}
|
|
|
|
void manager_ref_console(Manager *m) {
|
|
assert(m);
|
|
|
|
m->n_on_console++;
|
|
}
|
|
|
|
void manager_unref_console(Manager *m) {
|
|
|
|
assert(m->n_on_console > 0);
|
|
m->n_on_console--;
|
|
|
|
if (m->n_on_console == 0)
|
|
m->no_console_output = false; /* unset no_console_output flag, since the console is definitely free now */
|
|
}
|
|
|
|
void manager_override_log_level(Manager *m, int level) {
|
|
_cleanup_free_ char *s = NULL;
|
|
assert(m);
|
|
|
|
if (!m->log_level_overridden) {
|
|
m->original_log_level = log_get_max_level();
|
|
m->log_level_overridden = true;
|
|
}
|
|
|
|
(void) log_level_to_string_alloc(level, &s);
|
|
log_info("Setting log level to %s.", strna(s));
|
|
|
|
log_set_max_level(level);
|
|
}
|
|
|
|
void manager_restore_original_log_level(Manager *m) {
|
|
_cleanup_free_ char *s = NULL;
|
|
assert(m);
|
|
|
|
if (!m->log_level_overridden)
|
|
return;
|
|
|
|
(void) log_level_to_string_alloc(m->original_log_level, &s);
|
|
log_info("Restoring log level to original (%s).", strna(s));
|
|
|
|
log_set_max_level(m->original_log_level);
|
|
m->log_level_overridden = false;
|
|
}
|
|
|
|
void manager_override_log_target(Manager *m, LogTarget target) {
|
|
assert(m);
|
|
|
|
if (!m->log_target_overridden) {
|
|
m->original_log_target = log_get_target();
|
|
m->log_target_overridden = true;
|
|
}
|
|
|
|
log_info("Setting log target to %s.", log_target_to_string(target));
|
|
log_set_target(target);
|
|
}
|
|
|
|
void manager_restore_original_log_target(Manager *m) {
|
|
assert(m);
|
|
|
|
if (!m->log_target_overridden)
|
|
return;
|
|
|
|
log_info("Restoring log target to original %s.", log_target_to_string(m->original_log_target));
|
|
|
|
log_set_target(m->original_log_target);
|
|
m->log_target_overridden = false;
|
|
}
|
|
|
|
ManagerTimestamp manager_timestamp_initrd_mangle(ManagerTimestamp s) {
|
|
if (in_initrd() &&
|
|
s >= MANAGER_TIMESTAMP_SECURITY_START &&
|
|
s <= MANAGER_TIMESTAMP_UNITS_LOAD_FINISH)
|
|
return s - MANAGER_TIMESTAMP_SECURITY_START + MANAGER_TIMESTAMP_INITRD_SECURITY_START;
|
|
return s;
|
|
}
|
|
|
|
static const char *const manager_state_table[_MANAGER_STATE_MAX] = {
|
|
[MANAGER_INITIALIZING] = "initializing",
|
|
[MANAGER_STARTING] = "starting",
|
|
[MANAGER_RUNNING] = "running",
|
|
[MANAGER_DEGRADED] = "degraded",
|
|
[MANAGER_MAINTENANCE] = "maintenance",
|
|
[MANAGER_STOPPING] = "stopping",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(manager_state, ManagerState);
|
|
|
|
static const char *const manager_timestamp_table[_MANAGER_TIMESTAMP_MAX] = {
|
|
[MANAGER_TIMESTAMP_FIRMWARE] = "firmware",
|
|
[MANAGER_TIMESTAMP_LOADER] = "loader",
|
|
[MANAGER_TIMESTAMP_KERNEL] = "kernel",
|
|
[MANAGER_TIMESTAMP_INITRD] = "initrd",
|
|
[MANAGER_TIMESTAMP_USERSPACE] = "userspace",
|
|
[MANAGER_TIMESTAMP_FINISH] = "finish",
|
|
[MANAGER_TIMESTAMP_SECURITY_START] = "security-start",
|
|
[MANAGER_TIMESTAMP_SECURITY_FINISH] = "security-finish",
|
|
[MANAGER_TIMESTAMP_GENERATORS_START] = "generators-start",
|
|
[MANAGER_TIMESTAMP_GENERATORS_FINISH] = "generators-finish",
|
|
[MANAGER_TIMESTAMP_UNITS_LOAD_START] = "units-load-start",
|
|
[MANAGER_TIMESTAMP_UNITS_LOAD_FINISH] = "units-load-finish",
|
|
[MANAGER_TIMESTAMP_INITRD_SECURITY_START] = "initrd-security-start",
|
|
[MANAGER_TIMESTAMP_INITRD_SECURITY_FINISH] = "initrd-security-finish",
|
|
[MANAGER_TIMESTAMP_INITRD_GENERATORS_START] = "initrd-generators-start",
|
|
[MANAGER_TIMESTAMP_INITRD_GENERATORS_FINISH] = "initrd-generators-finish",
|
|
[MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_START] = "initrd-units-load-start",
|
|
[MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_FINISH] = "initrd-units-load-finish",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(manager_timestamp, ManagerTimestamp);
|
|
|
|
static const char* const oom_policy_table[_OOM_POLICY_MAX] = {
|
|
[OOM_CONTINUE] = "continue",
|
|
[OOM_STOP] = "stop",
|
|
[OOM_KILL] = "kill",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(oom_policy, OOMPolicy);
|