diff options
Diffstat (limited to 'src/core/manager.h')
| -rw-r--r-- | src/core/manager.h | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/src/core/manager.h b/src/core/manager.h new file mode 100644 index 0000000000..9ecc926cbf --- /dev/null +++ b/src/core/manager.h @@ -0,0 +1,304 @@ +/*-*- 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 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 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_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]); + + /* 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); + + /* 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 */ + + 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; + + /* 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; +#ifdef HAVE_SYSV_COMPAT + bool sysv_console; +#endif + bool mount_auto; + bool swap_auto; + + ExecOutput default_std_output, default_std_error; + + /* non-zero if we are reloading or reexecuting, */ + int n_reloading; + + unsigned n_installed_jobs; + unsigned n_failed_jobs; +}; + +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_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, DBusError *e, Unit **_ret); +int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret); + +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_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_set_default_controllers(Manager *m, char **controllers); + +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); +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 |