manager.h

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #ifndef foomanagerhfoo
   4 #define foomanagerhfoo
   5
   6 #include <stdbool.h>
   7 #include <inttypes.h>
   8 #include <stdio.h>
   9
  10 #include <dbus/dbus.h>
  11
  12 typedef struct Manager Manager;
  13 typedef enum WatchType WatchType;
  14 typedef struct Watch Watch;
  15
  16 enum WatchType {
  17         WATCH_INVALID,
  18         WATCH_SIGNAL,
  19         WATCH_FD,
  20         WATCH_TIMER,
  21         WATCH_MOUNT,
  22         WATCH_UDEV,
  23         WATCH_DBUS_WATCH,
  24         WATCH_DBUS_TIMEOUT
  25 };
  26
  27 struct Watch {
  28         int fd;
  29         WatchType type;
  30         bool fd_is_dupped;
  31         union {
  32                 union Unit *unit;
  33                 DBusWatch *bus_watch;
  34                 DBusTimeout *bus_timeout;
  35         } data;
  36 };
  37
  38 #include "unit.h"
  39 #include "job.h"
  40 #include "hashmap.h"
  41 #include "list.h"
  42 #include "set.h"
  43 #include "dbus.h"
  44
  45 #define SPECIAL_DEFAULT_TARGET "default.target"
  46 #define SPECIAL_SYSLOG_SERVICE "syslog.service"
  47 #define SPECIAL_DBUS_SERVICE "messagebus.service"
  48 #define SPECIAL_LOGGER_SOCKET "systemd-logger.socket"
  49 #define SPECIAL_KBREQUEST_TARGET "kbrequest.target"
  50 #define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target"
  51
  52 struct Manager {
  53         uint32_t current_job_id;
  54
  55         /* Note that the set of units we know of is allowed to be
  56          * incosistent. However the subset of it that is loaded may
  57          * not, and the list of jobs may neither. */
  58
  59         /* Active jobs and units */
  60         Hashmap *units;  /* name string => Unit object n:1 */
  61         Hashmap *jobs;   /* job id => Job object 1:1 */
  62
  63         /* To make it easy to iterate through the units of a specific
  64          * type we maintain a per type linked list */
  65         LIST_HEAD(Meta, units_per_type[_UNIT_TYPE_MAX]);
  66
  67         /* Units that need to be loaded */
  68         LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */
  69
  70         /* Jobs that need to be run */
  71         LIST_HEAD(Job, run_queue);   /* more a stack than a queue, too */
  72
  73         /* Jobs to be added */
  74         Hashmap *transaction_jobs;      /* Unit object => Job object list 1:1 */
  75         JobDependency *transaction_anchor;
  76
  77         bool dispatching_load_queue:1;
  78         bool dispatching_run_queue:1;
  79
  80         bool is_init:1;
  81
  82         bool request_bus_dispatch:1;
  83
  84         Hashmap *watch_pids;  /* pid => Unit object n:1 */
  85
  86         int epoll_fd;
  87
  88         Watch signal_watch;
  89
  90         /* Data specific to the device subsystem */
  91         struct udev* udev;
  92         struct udev_monitor* udev_monitor;
  93         Watch udev_watch;
  94
  95         /* Data specific to the mount subsystem */
  96         FILE *proc_self_mountinfo;
  97         Watch mount_watch;
  98
  99         /* Data specific to the D-Bus subsystem */
 100         DBusConnection *bus;
 101 };
 102
 103 Manager* manager_new(void);
 104 void manager_free(Manager *m);
 105
 106 int manager_coldplug(Manager *m);
 107
 108 Job *manager_get_job(Manager *m, uint32_t id);
 109 Unit *manager_get_unit(Manager *m, const char *name);
 110
 111 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u);
 112
 113 int manager_load_unit(Manager *m, const char *path_or_name, Unit **_ret);
 114 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret);
 115
 116 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
 117 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
 118
 119 void manager_transaction_unlink_job(Manager *m, Job *j);
 120
 121 void manager_clear_jobs(Manager *m);
 122
 123 void manager_dispatch_load_queue(Manager *m);
 124 void manager_dispatch_run_queue(Manager *m);
 125
 126 int manager_loop(Manager *m);
 127
 128 #endif