manager.h revision 6b78f9b4354010f8af2fe48c783ffd52b2db8f57
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef foomanagerhfoo
#define foomanagerhfoo
/***
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;
typedef enum ManagerRunningAs {
MANAGER_SYSTEM,
MANAGER_USER,
_MANAGER_RUNNING_AS_MAX,
_MANAGER_RUNNING_AS_INVALID = -1
} ManagerRunningAs;
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
};
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"
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;
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 initrd_timestamp;
dual_timestamp startup_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;
/* Audit fd */
#ifdef HAVE_AUDIT
int audit_fd;
#endif
/* Flags */
ManagerRunningAs 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;
/* Type=idle pipes */
int idle_pipe[2];
char *switch_root;
char *switch_root_init;
};
int manager_new(ManagerRunningAs 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_reload(Manager *m);
bool manager_is_booting_or_shutting_down(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);
bool manager_get_show_status(Manager *m);
const char *manager_running_as_to_string(ManagerRunningAs i);
ManagerRunningAs manager_running_as_from_string(const char *s);
#endif