/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #pragma once /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdbool.h> #include <inttypes.h> #include <stdio.h> #include "sd-bus.h" #include "sd-event.h" #include "fdset.h" #include "cgroup-util.h" /* Enforce upper limit how many names we allow */ #define MANAGER_MAX_NAMES 131072 /* 128K */ typedef struct Manager Manager; typedef enum ManagerExitCode { MANAGER_RUNNING, MANAGER_EXIT, MANAGER_RELOAD, MANAGER_REEXECUTE, MANAGER_REBOOT, MANAGER_POWEROFF, MANAGER_HALT, MANAGER_KEXEC, MANAGER_SWITCH_ROOT, _MANAGER_EXIT_CODE_MAX, _MANAGER_EXIT_CODE_INVALID = -1 } ManagerExitCode; #include "unit.h" #include "job.h" #include "hashmap.h" #include "list.h" #include "set.h" #include "path-lookup.h" #include "execute.h" #include "unit-name.h" #include "exit-status.h" struct Manager { /* Note that the set of units we know of is allowed to be * inconsistent. However the subset of it that is loaded may * not, and the list of jobs may neither. */ /* Active jobs and units */ Hashmap *units; /* name string => Unit object n:1 */ Hashmap *jobs; /* job id => Job object 1:1 */ /* To make it easy to iterate through the units of a specific * type we maintain a per type linked list */ LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]); /* Units that need to be loaded */ LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */ /* Jobs that need to be run */ LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */ /* Units and jobs that have not yet been announced via * D-Bus. When something about a job changes it is added here * if it is not in there yet. This allows easy coalescing of * D-Bus change signals. */ LIST_HEAD(Unit, dbus_unit_queue); LIST_HEAD(Job, dbus_job_queue); /* Units to remove */ LIST_HEAD(Unit, cleanup_queue); /* Units to check when doing GC */ LIST_HEAD(Unit, gc_queue); /* Units that should be realized */ LIST_HEAD(Unit, cgroup_queue); sd_event *event; /* We use two hash tables here, since the same PID might be * watched by two different units: once the unit that forked * it off, and possibly a different unit to which it was * joined as cgroup member. Since we know that it is either * one or two units for each PID we just use to hashmaps * here. */ Hashmap *watch_pids1; /* pid => Unit object n:1 */ Hashmap *watch_pids2; /* pid => Unit object n:1 */ sd_event_source *run_queue_event_source; char *notify_socket; int notify_fd; sd_event_source *notify_event_source; int signal_fd; sd_event_source *signal_event_source; int time_change_fd; sd_event_source *time_change_event_source; sd_event_source *jobs_in_progress_event_source; unsigned n_snapshots; LookupPaths lookup_paths; Set *unit_path_cache; char **environment; usec_t runtime_watchdog; usec_t shutdown_watchdog; dual_timestamp firmware_timestamp; dual_timestamp loader_timestamp; dual_timestamp kernel_timestamp; dual_timestamp initrd_timestamp; dual_timestamp userspace_timestamp; dual_timestamp finish_timestamp; dual_timestamp security_start_timestamp; dual_timestamp security_finish_timestamp; dual_timestamp generators_start_timestamp; dual_timestamp generators_finish_timestamp; dual_timestamp units_load_start_timestamp; dual_timestamp units_load_finish_timestamp; char *generator_unit_path; char *generator_unit_path_early; char *generator_unit_path_late; struct udev* udev; /* Data specific to the device subsystem */ struct udev_monitor* udev_monitor; sd_event_source *udev_event_source; Hashmap *devices_by_sysfs; /* Data specific to the mount subsystem */ FILE *proc_self_mountinfo; sd_event_source *mount_event_source; /* Data specific to the swap filesystem */ FILE *proc_swaps; sd_event_source *swap_event_source; Hashmap *swaps_by_devnode; /* Data specific to the D-Bus subsystem */ sd_bus *api_bus, *system_bus; Set *private_buses; int private_listen_fd; sd_event_source *private_listen_event_source; Set *subscribed; sd_bus_message *queued_message; /* This is used during reloading: * before the reload we queue the * reply message here, and * afterwards we send it */ sd_bus *queued_message_bus; /* The connection to send the queued message on */ Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */ bool send_reloading_done; uint32_t current_job_id; uint32_t default_unit_job_id; /* Data specific to the Automount subsystem */ int dev_autofs_fd; /* Data specific to the cgroup subsystem */ Hashmap *cgroup_unit; CGroupControllerMask cgroup_supported; char *cgroup_root; int gc_marker; unsigned n_in_gc_queue; /* Make sure the user cannot accidentally unmount our cgroup * file system */ int pin_cgroupfs_fd; /* Flags */ SystemdRunningAs running_as; ManagerExitCode exit_code:5; bool dispatching_load_queue:1; bool dispatching_dbus_queue:1; bool taint_usr:1; ShowStatus show_status; bool confirm_spawn; bool no_console_output; ExecOutput default_std_output, default_std_error; usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec; usec_t default_start_limit_interval; unsigned default_start_limit_burst; bool default_cpu_accounting; bool default_memory_accounting; bool default_blockio_accounting; struct rlimit *rlimit[RLIMIT_NLIMITS]; /* non-zero if we are reloading or reexecuting, */ int n_reloading; unsigned n_installed_jobs; unsigned n_failed_jobs; /* Jobs in progress watching */ unsigned n_running_jobs; unsigned n_on_console; unsigned jobs_in_progress_iteration; /* Type=idle pipes */ int idle_pipe[4]; sd_event_source *idle_pipe_event_source; char *switch_root; char *switch_root_init; /* This maps all possible path prefixes to the units needing * them. It's a hashmap with a path string as key and a Set as * value where Unit objects are contained. */ Hashmap *units_requiring_mounts_for; /* Reference to the kdbus bus control fd */ int kdbus_fd; }; int manager_new(SystemdRunningAs running_as, Manager **m); void manager_free(Manager *m); int manager_enumerate(Manager *m); int manager_startup(Manager *m, FILE *serialization, FDSet *fds); Job *manager_get_job(Manager *m, uint32_t id); Unit *manager_get_unit(Manager *m, const char *name); int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found); int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j); int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret); int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret); int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u); int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret); int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret); void manager_dump_units(Manager *s, FILE *f, const char *prefix); void manager_dump_jobs(Manager *s, FILE *f, const char *prefix); void manager_clear_jobs(Manager *m); unsigned manager_dispatch_load_queue(Manager *m); int manager_environment_add(Manager *m, char **minus, char **plus); int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit); int manager_loop(Manager *m); void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner); int manager_open_serialization(Manager *m, FILE **_f); int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root); int manager_deserialize(Manager *m, FILE *f, FDSet *fds); int manager_reload(Manager *m); bool manager_is_reloading_or_reexecuting(Manager *m) _pure_; void manager_reset_failed(Manager *m); void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success); void manager_send_unit_plymouth(Manager *m, Unit *u); bool manager_unit_inactive_or_pending(Manager *m, const char *name); void manager_check_finished(Manager *m); void manager_run_generators(Manager *m); void manager_undo_generators(Manager *m); void manager_recheck_journal(Manager *m); void manager_set_show_status(Manager *m, ShowStatus mode); void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5); void manager_flip_auto_status(Manager *m, bool enable); Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);