src/core/unit.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2010 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 #include <stdbool.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27
  28 typedef struct Unit Unit;
  29 typedef struct UnitVTable UnitVTable;
  30 typedef enum UnitActiveState UnitActiveState;
  31 typedef enum UnitDependency UnitDependency;
  32 typedef struct UnitRef UnitRef;
  33 typedef struct UnitStatusMessageFormats UnitStatusMessageFormats;
  34
  35 #include "sd-event.h"
  36 #include "set.h"
  37 #include "util.h"
  38 #include "list.h"
  39 #include "socket-util.h"
  40 #include "execute.h"
  41 #include "cgroup.h"
  42 #include "condition.h"
  43 #include "install.h"
  44 #include "unit-name.h"
  45
  46 enum UnitActiveState {
  47         UNIT_ACTIVE,
  48         UNIT_RELOADING,
  49         UNIT_INACTIVE,
  50         UNIT_FAILED,
  51         UNIT_ACTIVATING,
  52         UNIT_DEACTIVATING,
  53         _UNIT_ACTIVE_STATE_MAX,
  54         _UNIT_ACTIVE_STATE_INVALID = -1
  55 };
  56
  57 static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) {
  58         return t == UNIT_ACTIVE || t == UNIT_RELOADING;
  59 }
  60
  61 static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) {
  62         return t == UNIT_ACTIVE || t == UNIT_ACTIVATING || t == UNIT_RELOADING;
  63 }
  64
  65 static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) {
  66         return t == UNIT_INACTIVE || t == UNIT_FAILED || t == UNIT_DEACTIVATING;
  67 }
  68
  69 static inline bool UNIT_IS_INACTIVE_OR_FAILED(UnitActiveState t) {
  70         return t == UNIT_INACTIVE || t == UNIT_FAILED;
  71 }
  72
  73 enum UnitDependency {
  74         /* Positive dependencies */
  75         UNIT_REQUIRES,
  76         UNIT_REQUIRES_OVERRIDABLE,
  77         UNIT_REQUISITE,
  78         UNIT_REQUISITE_OVERRIDABLE,
  79         UNIT_WANTS,
  80         UNIT_BINDS_TO,
  81         UNIT_PART_OF,
  82
  83         /* Inverse of the above */
  84         UNIT_REQUIRED_BY,             /* inverse of 'requires' and 'requisite' is 'required_by' */
  85         UNIT_REQUIRED_BY_OVERRIDABLE, /* inverse of 'requires_overridable' and 'requisite_overridable' is 'soft_required_by' */
  86         UNIT_WANTED_BY,               /* inverse of 'wants' */
  87         UNIT_BOUND_BY,                /* inverse of 'binds_to' */
  88         UNIT_CONSISTS_OF,             /* inverse of 'part_of' */
  89
  90         /* Negative dependencies */
  91         UNIT_CONFLICTS,               /* inverse of 'conflicts' is 'conflicted_by' */
  92         UNIT_CONFLICTED_BY,
  93
  94         /* Order */
  95         UNIT_BEFORE,                  /* inverse of 'before' is 'after' and vice versa */
  96         UNIT_AFTER,
  97
  98         /* On Failure */
  99         UNIT_ON_FAILURE,
 100
 101         /* Triggers (i.e. a socket triggers a service) */
 102         UNIT_TRIGGERS,
 103         UNIT_TRIGGERED_BY,
 104
 105         /* Propagate reloads */
 106         UNIT_PROPAGATES_RELOAD_TO,
 107         UNIT_RELOAD_PROPAGATED_FROM,
 108
 109         /* Joins namespace of */
 110         UNIT_JOINS_NAMESPACE_OF,
 111
 112         /* Reference information for GC logic */
 113         UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
 114         UNIT_REFERENCED_BY,
 115
 116         _UNIT_DEPENDENCY_MAX,
 117         _UNIT_DEPENDENCY_INVALID = -1
 118 };
 119
 120 #include "manager.h"
 121 #include "job.h"
 122
 123 struct UnitRef {
 124         /* Keeps tracks of references to a unit. This is useful so
 125          * that we can merge two units if necessary and correct all
 126          * references to them */
 127
 128         Unit* unit;
 129         LIST_FIELDS(UnitRef, refs);
 130 };
 131
 132 struct Unit {
 133         Manager *manager;
 134
 135         UnitType type;
 136         UnitLoadState load_state;
 137         Unit *merged_into;
 138
 139         char *id; /* One name is special because we use it for identification. Points to an entry in the names set */
 140         char *instance;
 141
 142         Set *names;
 143         Set *dependencies[_UNIT_DEPENDENCY_MAX];
 144
 145         char **requires_mounts_for;
 146
 147         char *description;
 148         char **documentation;
 149
 150         char *fragment_path; /* if loaded from a config file this is the primary path to it */
 151         char *source_path; /* if converted, the source file */
 152         char **dropin_paths;
 153         usec_t fragment_mtime;
 154         usec_t source_mtime;
 155         usec_t dropin_mtime;
 156
 157         /* If there is something to do with this unit, then this is the installed job for it */
 158         Job *job;
 159
 160         /* JOB_NOP jobs are special and can be installed without disturbing the real job. */
 161         Job *nop_job;
 162
 163         usec_t job_timeout;
 164
 165         /* References to this */
 166         LIST_HEAD(UnitRef, refs);
 167
 168         /* Conditions to check */
 169         LIST_HEAD(Condition, conditions);
 170
 171         dual_timestamp condition_timestamp;
 172
 173         dual_timestamp inactive_exit_timestamp;
 174         dual_timestamp active_enter_timestamp;
 175         dual_timestamp active_exit_timestamp;
 176         dual_timestamp inactive_enter_timestamp;
 177
 178         /* Counterparts in the cgroup filesystem */
 179         char *cgroup_path;
 180         CGroupControllerMask cgroup_realized_mask;
 181         CGroupControllerMask cgroup_subtree_mask;
 182         CGroupControllerMask cgroup_members_mask;
 183
 184         UnitRef slice;
 185
 186         /* Per type list */
 187         LIST_FIELDS(Unit, units_by_type);
 188
 189         /* All units which have requires_mounts_for set */
 190         LIST_FIELDS(Unit, has_requires_mounts_for);
 191
 192         /* Load queue */
 193         LIST_FIELDS(Unit, load_queue);
 194
 195         /* D-Bus queue */
 196         LIST_FIELDS(Unit, dbus_queue);
 197
 198         /* Cleanup queue */
 199         LIST_FIELDS(Unit, cleanup_queue);
 200
 201         /* GC queue */
 202         LIST_FIELDS(Unit, gc_queue);
 203
 204         /* CGroup realize members queue */
 205         LIST_FIELDS(Unit, cgroup_queue);
 206
 207         /* PIDs we keep an eye on. Note that a unit might have many
 208          * more, but these are the ones we care enough about to
 209          * process SIGCHLD for */
 210         Set *pids;
 211
 212         /* Used during GC sweeps */
 213         unsigned gc_marker;
 214
 215         /* When deserializing, temporarily store the job type for this
 216          * unit here, if there was a job scheduled.
 217          * Only for deserializing from a legacy version. New style uses full
 218          * serialized jobs. */
 219         int deserialized_job; /* This is actually of type JobType */
 220
 221         /* Error code when we didn't manage to load the unit (negative) */
 222         int load_error;
 223
 224         /* Cached unit file state */
 225         UnitFileState unit_file_state;
 226
 227         /* Garbage collect us we nobody wants or requires us anymore */
 228         bool stop_when_unneeded;
 229
 230         /* Create default dependencies */
 231         bool default_dependencies;
 232
 233         /* Refuse manual starting, allow starting only indirectly via dependency. */
 234         bool refuse_manual_start;
 235
 236         /* Don't allow the user to stop this unit manually, allow stopping only indirectly via dependency. */
 237         bool refuse_manual_stop;
 238
 239         /* Allow isolation requests */
 240         bool allow_isolate;
 241
 242         /* How to start OnFailure units */
 243         JobMode on_failure_job_mode;
 244
 245         /* Ignore this unit when isolating */
 246         bool ignore_on_isolate;
 247
 248         /* Ignore this unit when snapshotting */
 249         bool ignore_on_snapshot;
 250
 251         /* Did the last condition check succeed? */
 252         bool condition_result;
 253
 254         /* Is this a transient unit? */
 255         bool transient;
 256
 257         bool in_load_queue:1;
 258         bool in_dbus_queue:1;
 259         bool in_cleanup_queue:1;
 260         bool in_gc_queue:1;
 261         bool in_cgroup_queue:1;
 262
 263         bool sent_dbus_new_signal:1;
 264
 265         bool no_gc:1;
 266
 267         bool in_audit:1;
 268
 269         bool cgroup_realized:1;
 270         bool cgroup_members_mask_valid:1;
 271         bool cgroup_subtree_mask_valid:1;
 272 };
 273
 274 struct UnitStatusMessageFormats {
 275         const char *starting_stopping[2];
 276         const char *finished_start_job[_JOB_RESULT_MAX];
 277         const char *finished_stop_job[_JOB_RESULT_MAX];
 278 };
 279
 280 typedef enum UnitSetPropertiesMode {
 281         UNIT_CHECK = 0,
 282         UNIT_RUNTIME = 1,
 283         UNIT_PERSISTENT = 2,
 284 } UnitSetPropertiesMode;
 285
 286 #include "service.h"
 287 #include "socket.h"
 288 #include "busname.h"
 289 #include "target.h"
 290 #include "snapshot.h"
 291 #include "device.h"
 292 #include "mount.h"
 293 #include "automount.h"
 294 #include "swap.h"
 295 #include "timer.h"
 296 #include "path.h"
 297 #include "slice.h"
 298 #include "scope.h"
 299
 300 struct UnitVTable {
 301         /* How much memory does an object of this unit type need */
 302         size_t object_size;
 303
 304         /* If greater than 0, the offset into the object where
 305          * ExecContext is found, if the unit type has that */
 306         size_t exec_context_offset;
 307
 308         /* If greater than 0, the offset into the object where
 309          * CGroupContext is found, if the unit type has that */
 310         size_t cgroup_context_offset;
 311
 312         /* If greater than 0, the offset into the object where
 313          * KillContext is found, if the unit type has that */
 314         size_t kill_context_offset;
 315
 316         /* If greater than 0, the offset into the object where the
 317          * pointer to ExecRuntime is found, if the unit type has
 318          * that */
 319         size_t exec_runtime_offset;
 320
 321         /* The name of the configuration file section with the private settings of this unit*/
 322         const char *private_section;
 323
 324         /* Config file sections this unit type understands, separated
 325          * by NUL chars */
 326         const char *sections;
 327
 328         /* This should reset all type-specific variables. This should
 329          * not allocate memory, and is called with zero-initialized
 330          * data. It should hence only initialize variables that need
 331          * to be set != 0. */
 332         void (*init)(Unit *u);
 333
 334         /* This should free all type-specific variables. It should be
 335          * idempotent. */
 336         void (*done)(Unit *u);
 337
 338         /* Actually load data from disk. This may fail, and should set
 339          * load_state to UNIT_LOADED, UNIT_MERGED or leave it at
 340          * UNIT_STUB if no configuration could be found. */
 341         int (*load)(Unit *u);
 342
 343         /* If a lot of units got created via enumerate(), this is
 344          * where to actually set the state and call unit_notify(). */
 345         int (*coldplug)(Unit *u);
 346
 347         void (*dump)(Unit *u, FILE *f, const char *prefix);
 348
 349         int (*start)(Unit *u);
 350         int (*stop)(Unit *u);
 351         int (*reload)(Unit *u);
 352
 353         int (*kill)(Unit *u, KillWho w, int signo, sd_bus_error *error);
 354
 355         bool (*can_reload)(Unit *u);
 356
 357         /* Write all data that cannot be restored from other sources
 358          * away using unit_serialize_item() */
 359         int (*serialize)(Unit *u, FILE *f, FDSet *fds);
 360
 361         /* Restore one item from the serialization */
 362         int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
 363
 364         /* Try to match up fds with what we need for this unit */
 365         int (*distribute_fds)(Unit *u, FDSet *fds);
 366
 367         /* Boils down the more complex internal state of this unit to
 368          * a simpler one that the engine can understand */
 369         UnitActiveState (*active_state)(Unit *u);
 370
 371         /* Returns the substate specific to this unit type as
 372          * string. This is purely information so that we can give the
 373          * user a more fine grained explanation in which actual state a
 374          * unit is in. */
 375         const char* (*sub_state_to_string)(Unit *u);
 376
 377         /* Return true when there is reason to keep this entry around
 378          * even nothing references it and it isn't active in any
 379          * way */
 380         bool (*check_gc)(Unit *u);
 381
 382         /* Return true when this unit is suitable for snapshotting */
 383         bool (*check_snapshot)(Unit *u);
 384
 385         /* Invoked on every child that died */
 386         void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
 387
 388         /* Reset failed state if we are in failed state */
 389         void (*reset_failed)(Unit *u);
 390
 391         /* Called whenever any of the cgroups this unit watches for
 392          * ran empty */
 393         void (*notify_cgroup_empty)(Unit *u);
 394
 395         /* Called whenever a process of this unit sends us a message */
 396         void (*notify_message)(Unit *u, pid_t pid, char **tags);
 397
 398         /* Called whenever a name this Unit registered for comes or
 399          * goes away. */
 400         void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner);
 401
 402         /* Called for each property that is being set */
 403         int (*bus_set_property)(Unit *u, const char *name, sd_bus_message *message, UnitSetPropertiesMode mode, sd_bus_error *error);
 404
 405         /* Called after at least one property got changed to apply the necessary change */
 406         int (*bus_commit_properties)(Unit *u);
 407
 408         /* Return the unit this unit is following */
 409         Unit *(*following)(Unit *u);
 410
 411         /* Return the set of units that are following each other */
 412         int (*following_set)(Unit *u, Set **s);
 413
 414         /* Invoked each time a unit this unit is triggering changes
 415          * state or gains/loses a job */
 416         void (*trigger_notify)(Unit *u, Unit *trigger);
 417
 418         /* Called whenever CLOCK_REALTIME made a jump */
 419         void (*time_change)(Unit *u);
 420
 421         int (*get_timeout)(Unit *u, uint64_t *timeout);
 422
 423         /* This is called for each unit type and should be used to
 424          * enumerate existing devices and load them. However,
 425          * everything that is loaded here should still stay in
 426          * inactive state. It is the job of the coldplug() call above
 427          * to put the units into the initial state.  */
 428         int (*enumerate)(Manager *m);
 429
 430         /* Type specific cleanups. */
 431         void (*shutdown)(Manager *m);
 432
 433         /* The interface name */
 434         const char *bus_interface;
 435
 436         /* The bus vtable */
 437         const sd_bus_vtable *bus_vtable;
 438
 439         /* The strings to print in status messages */
 440         UnitStatusMessageFormats status_message_formats;
 441
 442         /* Can units of this type have multiple names? */
 443         bool no_alias:1;
 444
 445         /* Instances make no sense for this type */
 446         bool no_instances:1;
 447
 448         /* Exclude from automatic gc */
 449         bool no_gc:1;
 450
 451         /* True if transient units of this type are OK */
 452         bool can_transient:1;
 453 };
 454
 455 extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
 456
 457 #define UNIT_VTABLE(u) unit_vtable[(u)->type]
 458
 459 /* For casting a unit into the various unit types */
 460 #define DEFINE_CAST(UPPERCASE, MixedCase)                               \
 461         static inline MixedCase* UPPERCASE(Unit *u) {                   \
 462                 if (_unlikely_(!u || u->type != UNIT_##UPPERCASE))      \
 463                         return NULL;                                    \
 464                                                                         \
 465                 return (MixedCase*) u;                                  \
 466         }
 467
 468 /* For casting the various unit types into a unit */
 469 #define UNIT(u) (&(u)->meta)
 470
 471 #define UNIT_TRIGGER(u) ((Unit*) set_first((u)->dependencies[UNIT_TRIGGERS]))
 472
 473 DEFINE_CAST(SERVICE, Service);
 474 DEFINE_CAST(SOCKET, Socket);
 475 DEFINE_CAST(BUSNAME, BusName);
 476 DEFINE_CAST(TARGET, Target);
 477 DEFINE_CAST(SNAPSHOT, Snapshot);
 478 DEFINE_CAST(DEVICE, Device);
 479 DEFINE_CAST(MOUNT, Mount);
 480 DEFINE_CAST(AUTOMOUNT, Automount);
 481 DEFINE_CAST(SWAP, Swap);
 482 DEFINE_CAST(TIMER, Timer);
 483 DEFINE_CAST(PATH, Path);
 484 DEFINE_CAST(SLICE, Slice);
 485 DEFINE_CAST(SCOPE, Scope);
 486
 487 Unit *unit_new(Manager *m, size_t size);
 488 void unit_free(Unit *u);
 489
 490 int unit_add_name(Unit *u, const char *name);
 491
 492 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference);
 493 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference);
 494
 495 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
 496 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
 497
 498 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
 499 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
 500
 501 int unit_add_exec_dependencies(Unit *u, ExecContext *c);
 502
 503 int unit_choose_id(Unit *u, const char *name);
 504 int unit_set_description(Unit *u, const char *description);
 505
 506 bool unit_check_gc(Unit *u);
 507
 508 void unit_add_to_load_queue(Unit *u);
 509 void unit_add_to_dbus_queue(Unit *u);
 510 void unit_add_to_cleanup_queue(Unit *u);
 511 void unit_add_to_gc_queue(Unit *u);
 512
 513 int unit_merge(Unit *u, Unit *other);
 514 int unit_merge_by_name(Unit *u, const char *other);
 515
 516 Unit *unit_follow_merge(Unit *u) _pure_;
 517
 518 int unit_load_fragment_and_dropin(Unit *u);
 519 int unit_load_fragment_and_dropin_optional(Unit *u);
 520 int unit_load(Unit *unit);
 521
 522 int unit_add_default_slice(Unit *u);
 523
 524 const char *unit_description(Unit *u) _pure_;
 525
 526 bool unit_has_name(Unit *u, const char *name);
 527
 528 UnitActiveState unit_active_state(Unit *u);
 529
 530 const char* unit_sub_state_to_string(Unit *u);
 531
 532 void unit_dump(Unit *u, FILE *f, const char *prefix);
 533
 534 bool unit_can_reload(Unit *u) _pure_;
 535 bool unit_can_start(Unit *u) _pure_;
 536 bool unit_can_isolate(Unit *u) _pure_;
 537
 538 int unit_start(Unit *u);
 539 int unit_stop(Unit *u);
 540 int unit_reload(Unit *u);
 541
 542 int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error);
 543 int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t control_pid, sd_bus_error *error);
 544
 545 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success);
 546
 547 int unit_watch_pid(Unit *u, pid_t pid);
 548 void unit_unwatch_pid(Unit *u, pid_t pid);
 549 int unit_watch_all_pids(Unit *u);
 550 void unit_unwatch_all_pids(Unit *u);
 551
 552 void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2);
 553
 554 int unit_watch_bus_name(Unit *u, const char *name);
 555 void unit_unwatch_bus_name(Unit *u, const char *name);
 556
 557 bool unit_job_is_applicable(Unit *u, JobType j);
 558
 559 int set_unit_path(const char *p);
 560
 561 char *unit_dbus_path(Unit *u);
 562
 563 int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
 564
 565 bool unit_can_serialize(Unit *u) _pure_;
 566 int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs);
 567 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(4,5);
 568 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
 569 int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
 570
 571 int unit_add_node_link(Unit *u, const char *what, bool wants);
 572
 573 int unit_coldplug(Unit *u);
 574
 575 void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0);
 576
 577 bool unit_need_daemon_reload(Unit *u);
 578
 579 void unit_reset_failed(Unit *u);
 580
 581 Unit *unit_following(Unit *u);
 582 int unit_following_set(Unit *u, Set **s);
 583
 584 const char *unit_slice_name(Unit *u);
 585
 586 bool unit_stop_pending(Unit *u) _pure_;
 587 bool unit_inactive_or_pending(Unit *u) _pure_;
 588 bool unit_active_or_pending(Unit *u);
 589
 590 int unit_add_default_target_dependency(Unit *u, Unit *target);
 591
 592 char *unit_default_cgroup_path(Unit *u);
 593
 594 void unit_start_on_failure(Unit *u);
 595 void unit_trigger_notify(Unit *u);
 596
 597 UnitFileState unit_get_unit_file_state(Unit *u);
 598
 599 Unit* unit_ref_set(UnitRef *ref, Unit *u);
 600 void unit_ref_unset(UnitRef *ref);
 601
 602 #define UNIT_DEREF(ref) ((ref).unit)
 603 #define UNIT_ISSET(ref) (!!(ref).unit)
 604
 605 int unit_exec_context_patch_defaults(Unit *u, ExecContext *c);
 606 int unit_cgroup_context_init_defaults(Unit *u, CGroupContext *c);
 607
 608 ExecContext *unit_get_exec_context(Unit *u) _pure_;
 609 KillContext *unit_get_kill_context(Unit *u) _pure_;
 610 CGroupContext *unit_get_cgroup_context(Unit *u) _pure_;
 611 ExecRuntime *unit_get_exec_runtime(Unit *u) _pure_;
 612
 613 int unit_setup_exec_runtime(Unit *u);
 614
 615 int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
 616 int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
 617
 618 int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
 619 int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
 620
 621 int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name);
 622
 623 int unit_kill_context(Unit *u, KillContext *c, bool sigkill, pid_t main_pid, pid_t control_pid, bool main_pid_alien);
 624
 625 int unit_make_transient(Unit *u);
 626
 627 int unit_require_mounts_for(Unit *u, const char *path);
 628
 629 const char *unit_active_state_to_string(UnitActiveState i) _const_;
 630 UnitActiveState unit_active_state_from_string(const char *s) _pure_;
 631
 632 const char *unit_dependency_to_string(UnitDependency i) _const_;
 633 UnitDependency unit_dependency_from_string(const char *s) _pure_;
 634
 635 /* Macros which append UNIT= or USER_UNIT= to the message */
 636
 637 #define log_full_unit(level, unit, ...) log_meta_object(level, __FILE__, __LINE__, __func__, getpid() == 1 ? "UNIT=" : "USER_UNIT=", unit, __VA_ARGS__)
 638 #define log_debug_unit(unit, ...)       log_full_unit(LOG_DEBUG, unit, __VA_ARGS__)
 639 #define log_info_unit(unit, ...)        log_full_unit(LOG_INFO, unit, __VA_ARGS__)
 640 #define log_notice_unit(unit, ...)      log_full_unit(LOG_NOTICE, unit, __VA_ARGS__)
 641 #define log_warning_unit(unit, ...)     log_full_unit(LOG_WARNING, unit, __VA_ARGS__)
 642 #define log_error_unit(unit, ...)       log_full_unit(LOG_ERR, unit, __VA_ARGS__)
 643
 644 #define log_struct_unit(level, unit, ...) log_struct(level, getpid() == 1 ? "UNIT=%s" : "USER_UNIT=%s", unit, __VA_ARGS__)