manager.h revision 718db96199eb307751264e4163555662c9a389fa
/*-*- 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"
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;
Hashmap *watch_pids; /* pid => Unit object n:1 */
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;
/* Data specific to the device subsystem */
struct udev* udev;
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_proc_swaps;
bool request_reload;
/* 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_run_queue:1;
bool dispatching_dbus_queue:1;
bool taint_usr:1;
bool 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;
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;
};
int manager_new(SystemdRunningAs running_as, bool reexecuting, 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, bool b);
void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);