414 lines
14 KiB
C
414 lines
14 KiB
C
#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 <libmount.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include "sd-bus.h"
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#include "sd-event.h"
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#include "cgroup-util.h"
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#include "fdset.h"
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#include "hashmap.h"
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#include "list.h"
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#include "ratelimit.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 ManagerState {
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MANAGER_INITIALIZING,
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MANAGER_STARTING,
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MANAGER_RUNNING,
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MANAGER_DEGRADED,
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MANAGER_MAINTENANCE,
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MANAGER_STOPPING,
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_MANAGER_STATE_MAX,
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_MANAGER_STATE_INVALID = -1
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} ManagerState;
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typedef enum ManagerExitCode {
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MANAGER_OK,
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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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typedef enum StatusType {
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STATUS_TYPE_EPHEMERAL,
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STATUS_TYPE_NORMAL,
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STATUS_TYPE_EMERGENCY,
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} StatusType;
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#include "execute.h"
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#include "job.h"
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#include "path-lookup.h"
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#include "show-status.h"
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#include "unit-name.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 *units_by_invocation_id;
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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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/* 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 and jobs to check when doing GC */
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LIST_HEAD(Unit, gc_unit_queue);
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LIST_HEAD(Job, gc_job_queue);
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/* Units that should be realized */
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LIST_HEAD(Unit, cgroup_queue);
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sd_event *event;
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/* We use two hash tables here, since the same PID might be
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* watched by two different units: once the unit that forked
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* it off, and possibly a different unit to which it was
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* joined as cgroup member. Since we know that it is either
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* one or two units for each PID we just use to hashmaps
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* here. */
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Hashmap *watch_pids1; /* pid => Unit object n:1 */
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Hashmap *watch_pids2; /* pid => Unit object n:1 */
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/* A set contains all units which cgroup should be refreshed after startup */
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Set *startup_units;
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/* A set which contains all currently failed units */
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Set *failed_units;
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sd_event_source *run_queue_event_source;
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char *notify_socket;
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int notify_fd;
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sd_event_source *notify_event_source;
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int cgroups_agent_fd;
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sd_event_source *cgroups_agent_event_source;
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int signal_fd;
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sd_event_source *signal_event_source;
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int time_change_fd;
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sd_event_source *time_change_event_source;
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sd_event_source *jobs_in_progress_event_source;
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int user_lookup_fds[2];
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sd_event_source *user_lookup_event_source;
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UnitFileScope unit_file_scope;
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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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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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dual_timestamp security_start_timestamp;
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dual_timestamp security_finish_timestamp;
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dual_timestamp generators_start_timestamp;
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dual_timestamp generators_finish_timestamp;
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dual_timestamp units_load_start_timestamp;
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dual_timestamp units_load_finish_timestamp;
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struct udev* udev;
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/* Data specific to the device subsystem */
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struct udev_monitor* udev_monitor;
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sd_event_source *udev_event_source;
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Hashmap *devices_by_sysfs;
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/* Data specific to the mount subsystem */
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struct libmnt_monitor *mount_monitor;
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sd_event_source *mount_event_source;
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/* Data specific to the swap filesystem */
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FILE *proc_swaps;
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sd_event_source *swap_event_source;
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Hashmap *swaps_by_devnode;
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/* Data specific to the D-Bus subsystem */
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sd_bus *api_bus, *system_bus;
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Set *private_buses;
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int private_listen_fd;
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sd_event_source *private_listen_event_source;
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/* Contains all the clients that are subscribed to signals via
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the API bus. Note that private bus connections are always
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considered subscribes, since they last for very short only,
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and it is much simpler that way. */
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sd_bus_track *subscribed;
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char **deserialized_subscribed;
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/* This is used during reloading: before the reload we queue
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* the reply message here, and afterwards we send it */
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sd_bus_message *queued_message;
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Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
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bool send_reloading_done;
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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_unit;
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CGroupMask cgroup_supported;
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char *cgroup_root;
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/* Notifications from cgroups, when the unified hierarchy is
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* used is done via inotify. */
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int cgroup_inotify_fd;
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sd_event_source *cgroup_inotify_event_source;
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Hashmap *cgroup_inotify_wd_unit;
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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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int gc_marker;
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/* Flags */
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ManagerExitCode exit_code:5;
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bool dispatching_load_queue:1;
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bool dispatching_dbus_queue:1;
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bool taint_usr:1;
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bool test_run:1;
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/* If non-zero, exit with the following value when the systemd
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* process terminate. Useful for containers: systemd-nspawn could get
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* the return value. */
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uint8_t return_value;
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ShowStatus show_status;
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char *confirm_spawn;
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bool no_console_output;
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ExecOutput default_std_output, default_std_error;
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usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
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usec_t default_start_limit_interval;
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unsigned default_start_limit_burst;
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bool default_cpu_accounting;
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bool default_memory_accounting;
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bool default_io_accounting;
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bool default_blockio_accounting;
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bool default_tasks_accounting;
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uint64_t default_tasks_max;
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usec_t default_timer_accuracy_usec;
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struct rlimit *rlimit[_RLIMIT_MAX];
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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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/* Jobs in progress watching */
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unsigned n_running_jobs;
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unsigned n_on_console;
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unsigned jobs_in_progress_iteration;
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/* Do we have any outstanding password prompts? */
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int have_ask_password;
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int ask_password_inotify_fd;
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sd_event_source *ask_password_event_source;
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/* Type=idle pipes */
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int idle_pipe[4];
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sd_event_source *idle_pipe_event_source;
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char *switch_root;
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char *switch_root_init;
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/* This maps all possible path prefixes to the units needing
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* them. It's a hashmap with a path string as key and a Set as
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* value where Unit objects are contained. */
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Hashmap *units_requiring_mounts_for;
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/* Used for processing polkit authorization responses */
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Hashmap *polkit_registry;
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/* Dynamic users/groups, indexed by their name */
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Hashmap *dynamic_users;
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/* Keep track of all UIDs and GIDs any of our services currently use. This is useful for the RemoveIPC= logic. */
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Hashmap *uid_refs;
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Hashmap *gid_refs;
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/* When the user hits C-A-D more than 7 times per 2s, do something immediately... */
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RateLimit ctrl_alt_del_ratelimit;
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EmergencyAction cad_burst_action;
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const char *unit_log_field;
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const char *unit_log_format_string;
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const char *invocation_log_field;
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const char *invocation_log_format_string;
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int first_boot; /* tri-state */
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/* prefixes of e.g. RuntimeDirectory= */
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char *prefix[_EXEC_DIRECTORY_MAX];
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};
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#define MANAGER_IS_SYSTEM(m) ((m)->unit_file_scope == UNIT_FILE_SYSTEM)
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#define MANAGER_IS_USER(m) ((m)->unit_file_scope != UNIT_FILE_SYSTEM)
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#define MANAGER_IS_RELOADING(m) ((m)->n_reloading > 0)
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int manager_new(UnitFileScope scope, bool test_run, Manager **m);
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Manager* manager_free(Manager *m);
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void manager_enumerate(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, sd_bus_error *e, Unit **_ret);
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int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
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int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
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int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, sd_bus_error *e, Job **_ret);
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int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, sd_bus_error *e, Job **_ret);
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int manager_add_job_by_name_and_warn(Manager *m, JobType type, const char *name, JobMode mode, Job **ret);
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int manager_propagate_reload(Manager *m, Unit *unit, JobMode mode, sd_bus_error *e);
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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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int manager_environment_add(Manager *m, char **minus, char **plus);
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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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int manager_open_serialization(Manager *m, FILE **_f);
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int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
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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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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_inactive_or_pending(Manager *m, const char *name);
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void manager_check_finished(Manager *m);
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void manager_recheck_journal(Manager *m);
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void manager_set_show_status(Manager *m, ShowStatus mode);
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void manager_set_first_boot(Manager *m, bool b);
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void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) _printf_(4,5);
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void manager_flip_auto_status(Manager *m, bool enable);
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Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
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int manager_set_exec_params(Manager *m, ExecParameters *p);
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ManagerState manager_state(Manager *m);
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int manager_update_failed_units(Manager *m, Unit *u, bool failed);
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void manager_unref_uid(Manager *m, uid_t uid, bool destroy_now);
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int manager_ref_uid(Manager *m, uid_t uid, bool clean_ipc);
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void manager_unref_gid(Manager *m, gid_t gid, bool destroy_now);
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int manager_ref_gid(Manager *m, gid_t gid, bool destroy_now);
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void manager_vacuum_uid_refs(Manager *m);
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void manager_vacuum_gid_refs(Manager *m);
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void manager_serialize_uid_refs(Manager *m, FILE *f);
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void manager_deserialize_uid_refs_one(Manager *m, const char *value);
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void manager_serialize_gid_refs(Manager *m, FILE *f);
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void manager_deserialize_gid_refs_one(Manager *m, const char *value);
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const char *manager_state_to_string(ManagerState m) _const_;
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ManagerState manager_state_from_string(const char *s) _pure_;
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const char *manager_get_confirm_spawn(Manager *m);
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bool manager_is_confirm_spawn_disabled(Manager *m);
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void manager_disable_confirm_spawn(void);
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