298 lines
9.0 KiB
C
298 lines
9.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <dbus/dbus.h>
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#include "fdset.h"
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/* Enforce upper limit how many names we allow */
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#define MANAGER_MAX_NAMES 131072 /* 128K */
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typedef struct Manager Manager;
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typedef enum WatchType WatchType;
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typedef struct Watch Watch;
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typedef enum ManagerExitCode {
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MANAGER_RUNNING,
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MANAGER_EXIT,
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MANAGER_RELOAD,
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MANAGER_REEXECUTE,
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MANAGER_REBOOT,
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MANAGER_POWEROFF,
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MANAGER_HALT,
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MANAGER_KEXEC,
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MANAGER_SWITCH_ROOT,
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_MANAGER_EXIT_CODE_MAX,
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_MANAGER_EXIT_CODE_INVALID = -1
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} ManagerExitCode;
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enum WatchType {
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WATCH_INVALID,
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WATCH_SIGNAL,
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WATCH_NOTIFY,
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WATCH_FD,
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WATCH_UNIT_TIMER,
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WATCH_JOB_TIMER,
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WATCH_MOUNT,
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WATCH_SWAP,
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WATCH_UDEV,
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WATCH_DBUS_WATCH,
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WATCH_DBUS_TIMEOUT,
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WATCH_TIME_CHANGE
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};
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struct Watch {
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int fd;
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WatchType type;
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union {
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struct Unit *unit;
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struct Job *job;
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DBusWatch *bus_watch;
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DBusTimeout *bus_timeout;
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} data;
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bool fd_is_dupped:1;
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bool socket_accept:1;
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};
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#include "unit.h"
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#include "job.h"
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#include "hashmap.h"
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#include "list.h"
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#include "set.h"
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#include "dbus.h"
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#include "path-lookup.h"
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struct Manager {
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/* Note that the set of units we know of is allowed to be
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* inconsistent. However the subset of it that is loaded may
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* not, and the list of jobs may neither. */
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/* Active jobs and units */
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Hashmap *units; /* name string => Unit object n:1 */
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Hashmap *jobs; /* job id => Job object 1:1 */
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/* To make it easy to iterate through the units of a specific
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* type we maintain a per type linked list */
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LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
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/* To optimize iteration of units that have requires_mounts_for set */
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LIST_HEAD(Unit, has_requires_mounts_for);
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/* Units that need to be loaded */
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LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
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/* Jobs that need to be run */
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LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
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/* Units and jobs that have not yet been announced via
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* D-Bus. When something about a job changes it is added here
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* if it is not in there yet. This allows easy coalescing of
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* D-Bus change signals. */
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LIST_HEAD(Unit, dbus_unit_queue);
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LIST_HEAD(Job, dbus_job_queue);
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/* Units to remove */
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LIST_HEAD(Unit, cleanup_queue);
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/* Units to check when doing GC */
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LIST_HEAD(Unit, gc_queue);
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Hashmap *watch_pids; /* pid => Unit object n:1 */
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char *notify_socket;
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Watch notify_watch;
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Watch signal_watch;
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Watch time_change_watch;
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int epoll_fd;
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unsigned n_snapshots;
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LookupPaths lookup_paths;
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Set *unit_path_cache;
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char **environment;
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char **default_controllers;
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usec_t runtime_watchdog;
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usec_t shutdown_watchdog;
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dual_timestamp firmware_timestamp;
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dual_timestamp loader_timestamp;
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dual_timestamp kernel_timestamp;
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dual_timestamp initrd_timestamp;
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dual_timestamp userspace_timestamp;
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dual_timestamp finish_timestamp;
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char *generator_unit_path;
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char *generator_unit_path_early;
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char *generator_unit_path_late;
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/* Data specific to the device subsystem */
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struct udev* udev;
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struct udev_monitor* udev_monitor;
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Watch udev_watch;
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Hashmap *devices_by_sysfs;
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/* Data specific to the mount subsystem */
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FILE *proc_self_mountinfo;
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Watch mount_watch;
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/* Data specific to the swap filesystem */
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FILE *proc_swaps;
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Hashmap *swaps_by_proc_swaps;
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bool request_reload;
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Watch swap_watch;
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/* Data specific to the D-Bus subsystem */
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DBusConnection *api_bus, *system_bus;
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DBusServer *private_bus;
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Set *bus_connections, *bus_connections_for_dispatch;
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DBusMessage *queued_message; /* This is used during reloading:
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* before the reload we queue the
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* reply message here, and
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* afterwards we send it */
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DBusConnection *queued_message_connection; /* The connection to send the queued message on */
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Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
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int32_t name_data_slot;
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int32_t conn_data_slot;
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int32_t subscribed_data_slot;
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uint32_t current_job_id;
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uint32_t default_unit_job_id;
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/* Data specific to the Automount subsystem */
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int dev_autofs_fd;
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/* Data specific to the cgroup subsystem */
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Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
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char *cgroup_hierarchy;
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usec_t gc_queue_timestamp;
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int gc_marker;
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unsigned n_in_gc_queue;
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/* Make sure the user cannot accidentally unmount our cgroup
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* file system */
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int pin_cgroupfs_fd;
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/* Flags */
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SystemdRunningAs running_as;
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ManagerExitCode exit_code:5;
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bool dispatching_load_queue:1;
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bool dispatching_run_queue:1;
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bool dispatching_dbus_queue:1;
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bool taint_usr:1;
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bool show_status;
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bool confirm_spawn;
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ExecOutput default_std_output, default_std_error;
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struct rlimit *rlimit[RLIMIT_NLIMITS];
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/* non-zero if we are reloading or reexecuting, */
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int n_reloading;
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unsigned n_installed_jobs;
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unsigned n_failed_jobs;
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/* Type=idle pipes */
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int idle_pipe[2];
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char *switch_root;
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char *switch_root_init;
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};
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int manager_new(SystemdRunningAs running_as, Manager **m);
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void manager_free(Manager *m);
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int manager_enumerate(Manager *m);
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int manager_coldplug(Manager *m);
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int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
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Job *manager_get_job(Manager *m, uint32_t id);
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Unit *manager_get_unit(Manager *m, const char *name);
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int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
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int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
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int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
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int manager_load_unit_from_dbus_path(Manager *m, const char *s, DBusError *e, Unit **_u);
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int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, DBusError *e, Job **_ret);
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int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, DBusError *e, Job **_ret);
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void manager_dump_units(Manager *s, FILE *f, const char *prefix);
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void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
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void manager_clear_jobs(Manager *m);
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unsigned manager_dispatch_load_queue(Manager *m);
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unsigned manager_dispatch_run_queue(Manager *m);
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unsigned manager_dispatch_dbus_queue(Manager *m);
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int manager_set_default_controllers(Manager *m, char **controllers);
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int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
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int manager_loop(Manager *m);
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void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
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void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid);
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int manager_open_serialization(Manager *m, FILE **_f);
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int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool serialize_jobs);
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int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
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int manager_reload(Manager *m);
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bool manager_is_booting_or_shutting_down(Manager *m);
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void manager_reset_failed(Manager *m);
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void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
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void manager_send_unit_plymouth(Manager *m, Unit *u);
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bool manager_unit_pending_inactive(Manager *m, const char *name);
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void manager_check_finished(Manager *m);
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void manager_run_generators(Manager *m);
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void manager_undo_generators(Manager *m);
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void manager_recheck_journal(Manager *m);
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void manager_set_show_status(Manager *m, bool b);
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bool manager_get_show_status(Manager *m);
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void watch_init(Watch *w);
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