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Diffstat (limited to 'src/manager.h')
| -rw-r--r-- | src/manager.h | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/src/manager.h b/src/manager.h new file mode 100644 index 0000000000..a6500ac600 --- /dev/null +++ b/src/manager.h @@ -0,0 +1,284 @@ +/*-*- 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" +#define SPECIAL_REMOTE_FS_TARGET "remote-fs.target" +#define SPECIAL_SWAP_TARGET "swap.target" +#define SPECIAL_NETWORK_TARGET "network.target" +#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" /* Should pull in syslog.socket or syslog.service */ +#define SPECIAL_RTC_SET_TARGET "rtc-set.target" /* LSB's $time */ + +#define SPECIAL_BASIC_TARGET "basic.target" +#define SPECIAL_RESCUE_TARGET "rescue.target" + +#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; + + usec_t boot_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 |