/*-*- Mode: C; c-basic-offset: 8 -*-*/ #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 General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU 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 2048 typedef struct Manager Manager; typedef enum WatchType WatchType; typedef struct Watch Watch; typedef enum ManagerExitCode { MANAGER_RUNNING, MANAGER_EXIT, MANAGER_RELOAD, MANAGER_REEXECUTE, _MANAGER_EXIT_CODE_MAX, _MANAGER_EXIT_CODE_INVALID = -1 } ManagerExitCode; typedef enum ManagerRunningAs { MANAGER_INIT, /* root and pid=1 */ MANAGER_SYSTEM, /* root and pid!=1 */ MANAGER_SESSION, /* non-root, for a session */ _MANAGER_RUNNING_AS_MAX, _MANAGER_RUNNING_AS_INVALID = -1 } ManagerRunningAs; enum WatchType { WATCH_INVALID, WATCH_SIGNAL, WATCH_FD, WATCH_TIMER, WATCH_MOUNT, WATCH_UDEV, WATCH_DBUS_WATCH, WATCH_DBUS_TIMEOUT }; struct Watch { int fd; WatchType type; union { union Unit *unit; 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" #define SPECIAL_DEFAULT_TARGET "default.target" /* This is not really intended to be started by directly. This is * mostly so that other targets (reboot/halt/poweroff) can depend on * it to bring all services down that want to be brought down on * system shutdown. */ #define SPECIAL_SHUTDOWN_TARGET "shutdown.target" #define SPECIAL_LOGGER_SOCKET "systemd-logger.socket" #define SPECIAL_KBREQUEST_TARGET "kbrequest.target" #define SPECIAL_SIGPWR_TARGET "sigpwr.target" #define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target" #define SPECIAL_LOCAL_FS_TARGET "local-fs.target" /* LSB's $local_fs */ #define SPECIAL_REMOTE_FS_TARGET "remote-fs.target" /* LSB's $remote_fs */ #define SPECIAL_SWAP_TARGET "swap.target" #define SPECIAL_NETWORK_TARGET "network.target" /* LSB's $network */ #define SPECIAL_NSS_LOOKUP_TARGET "nss-lookup.target" /* LSB's $named */ #define SPECIAL_RPCBIND_TARGET "rpcbind.target" /* LSB's $portmap */ #define SPECIAL_SYSLOG_TARGET "syslog.target" /* LSB's $syslog; Should pull in syslog.socket or syslog.service */ #define SPECIAL_RTC_SET_TARGET "rtc-set.target" /* LSB's $time */ #define SPECIAL_DISPLAY_MANAGER_SERVICE "display-manager.service" /* Debian's $x-display-manager */ #define SPECIAL_MAIL_TRANSFER_AGENT_TARGET "mail-transfer-agent.target" /* Debian's $mail-{transport|transfer-agent */ #define SPECIAL_BASIC_TARGET "basic.target" #define SPECIAL_SYSINIT_TARGET "sysinit.target" #define SPECIAL_RESCUE_TARGET "rescue.target" #define SPECIAL_EXIT_SERVICE "exit.service" #ifndef SPECIAL_DBUS_SERVICE #define SPECIAL_DBUS_SERVICE "dbus.service" #endif #ifndef SPECIAL_SYSLOG_SERVICE #define SPECIAL_SYSLOG_SERVICE "syslog.service" #endif /* For SysV compatibility. Usually an alias for a saner target. On * SysV-free systems this doesn't exist. */ #define SPECIAL_RUNLEVEL0_TARGET "runlevel0.target" #define SPECIAL_RUNLEVEL1_TARGET "runlevel1.target" #define SPECIAL_RUNLEVEL2_TARGET "runlevel2.target" #define SPECIAL_RUNLEVEL3_TARGET "runlevel3.target" #define SPECIAL_RUNLEVEL4_TARGET "runlevel4.target" #define SPECIAL_RUNLEVEL5_TARGET "runlevel5.target" #define SPECIAL_RUNLEVEL6_TARGET "runlevel6.target" struct Manager { uint32_t current_job_id; /* Note that the set of units we know of is allowed to be * incosistent. 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(Meta, units_per_type[_UNIT_TYPE_MAX]); /* Units that need to be loaded */ LIST_HEAD(Meta, 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(Meta, dbus_unit_queue); LIST_HEAD(Job, dbus_job_queue); /* Units to remove */ LIST_HEAD(Meta, cleanup_queue); /* Units to check when doing GC */ LIST_HEAD(Meta, gc_queue); /* Jobs to be added */ Hashmap *transaction_jobs; /* Unit object => Job object list 1:1 */ JobDependency *transaction_anchor; Hashmap *watch_pids; /* pid => Unit object n:1 */ Watch signal_watch; int epoll_fd; unsigned n_snapshots; char **unit_path; char **sysvinit_path; char **sysvrcnd_path; char **environment; timestamp startup_timestamp; /* Data specific to the device subsystem */ struct udev* udev; struct udev_monitor* udev_monitor; Watch udev_watch; /* Data specific to the mount subsystem */ FILE *proc_self_mountinfo; Watch mount_watch; /* Data specific to the swap filesystem */ FILE *proc_swaps; /* Data specific to the D-Bus subsystem */ DBusConnection *api_bus, *system_bus; Set *subscribed; DBusMessage *queued_message; /* This is used during reloading: * before the reload we queue the * reply message here, and * afterwards we send it */ Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */ int32_t name_data_slot; /* 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_controller; char *cgroup_hierarchy; usec_t gc_queue_timestamp; int gc_marker; unsigned n_in_gc_queue; /* Flags */ ManagerRunningAs running_as; ManagerExitCode exit_code:4; bool dispatching_load_queue:1; bool dispatching_run_queue:1; bool dispatching_dbus_queue:1; bool request_api_bus_dispatch:1; bool request_system_bus_dispatch:1; bool utmp_reboot_written:1; bool confirm_spawn:1; }; int manager_new(ManagerRunningAs running_as, bool confirm_spawn, 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_unit_from_dbus_path(Manager *m, const char *s, Unit **_u); 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, Unit **_ret); int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret); int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret); int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, 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_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies); 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_loop(Manager *m); void manager_write_utmp_reboot(Manager *m); void manager_write_utmp_runlevel(Manager *m, Unit *t); 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(FILE **_f); int manager_serialize(Manager *m, FILE *f, FDSet *fds); int manager_deserialize(Manager *m, FILE *f, FDSet *fds); int manager_reload(Manager *m); const char *manager_running_as_to_string(ManagerRunningAs i); ManagerRunningAs manager_running_as_from_string(const char *s); #endif