/*-*- 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 <dbus/dbus.h> #include "fdset.h" /* Enforce upper limit how many names we allow */ #define MANAGER_MAX_NAMES 131072 /* 128K */ typedef struct Manager Manager; typedef enum WatchType WatchType; typedef struct Watch Watch; 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; enum WatchType { WATCH_INVALID, WATCH_SIGNAL, WATCH_NOTIFY, WATCH_FD, WATCH_UNIT_TIMER, WATCH_JOB_TIMER, WATCH_MOUNT, WATCH_SWAP, WATCH_UDEV, WATCH_DBUS_WATCH, WATCH_DBUS_TIMEOUT, WATCH_TIME_CHANGE, WATCH_JOBS_IN_PROGRESS }; struct Watch { int fd; WatchType type; union { struct Unit *unit; struct Job *job; DBusWatch *bus_watch; DBusTimeout *bus_timeout; } data; bool fd_is_dupped:1; bool socket_accept:1; }; #include "unit.h" #include "job.h" #include "hashmap.h" #include "list.h" #include "set.h" #include "dbus.h" #include "path-lookup.h" #include "execute.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]); /* To optimize iteration of units that have requires_mounts_for set */ LIST_HEAD(Unit, has_requires_mounts_for); /* 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); Hashmap *watch_pids; /* pid => Unit object n:1 */ char *notify_socket; Watch notify_watch; Watch signal_watch; Watch time_change_watch; Watch jobs_in_progress_watch; int epoll_fd; unsigned n_snapshots; LookupPaths lookup_paths; Set *unit_path_cache; char **environment; char **default_controllers; 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; char *generator_unit_path; char *generator_unit_path_early; char *generator_unit_path_late; /* Data specific to the device subsystem */ struct udev* udev; struct udev_monitor* udev_monitor; Watch udev_watch; Hashmap *devices_by_sysfs; /* Data specific to the mount subsystem */ FILE *proc_self_mountinfo; Watch mount_watch; /* Data specific to the swap filesystem */ FILE *proc_swaps; Hashmap *swaps_by_proc_swaps; bool request_reload; Watch swap_watch; /* Data specific to the D-Bus subsystem */ DBusConnection *api_bus, *system_bus; DBusServer *private_bus; Set *bus_connections, *bus_connections_for_dispatch; DBusMessage *queued_message; /* This is used during reloading: * before the reload we queue the * reply message here, and * afterwards we send it */ DBusConnection *queued_message_connection; /* The connection to send the queued message on */ Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */ int32_t name_data_slot; int32_t conn_data_slot; int32_t subscribed_data_slot; 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_bondings; /* path string => CGroupBonding object 1:n */ char *cgroup_hierarchy; usec_t gc_queue_timestamp; 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_run_queue:1; bool dispatching_dbus_queue:1; bool taint_usr:1; bool show_status; bool confirm_spawn; ExecOutput default_std_output, default_std_error; 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[2]; char *switch_root; char *switch_root_init; }; int manager_new(SystemdRunningAs running_as, Manager **m); void manager_free(Manager *m); int manager_enumerate(Manager *m); int manager_coldplug(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_job_from_dbus_path(Manager *m, const char *s, Job **_j); int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret); int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret); int manager_load_unit_from_dbus_path(Manager *m, const char *s, DBusError *e, Unit **_u); int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, DBusError *e, Job **_ret); int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, DBusError *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); unsigned manager_dispatch_run_queue(Manager *m); unsigned manager_dispatch_dbus_queue(Manager *m); int manager_set_default_controllers(Manager *m, char **controllers); 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); void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid); int manager_open_serialization(Manager *m, FILE **_f); int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool serialize_jobs); int manager_deserialize(Manager *m, FILE *f, FDSet *fds); int manager_distribute_fds(Manager *m, FDSet *fds); int manager_reload(Manager *m); bool manager_is_reloading_or_reexecuting(Manager *m); 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_pending_inactive(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, bool b); void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...); void watch_init(Watch *w);