src/core/unit.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stdbool.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26 typedef struct Unit Unit;
  27 typedef struct UnitVTable UnitVTable;
  28 typedef struct UnitRef UnitRef;
  29 typedef struct UnitStatusMessageFormats UnitStatusMessageFormats;
  30
  31 #include "condition.h"
  32 #include "failure-action.h"
  33 #include "install.h"
  34 #include "list.h"
  35 #include "unit-name.h"
  36
  37 typedef enum KillOperation {
  38         KILL_TERMINATE,
  39         KILL_KILL,
  40         KILL_ABORT,
  41         _KILL_OPERATION_MAX,
  42         _KILL_OPERATION_INVALID = -1
  43 } KillOperation;
  44
  45 static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) {
  46         return t == UNIT_ACTIVE || t == UNIT_RELOADING;
  47 }
  48
  49 static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) {
  50         return t == UNIT_ACTIVE || t == UNIT_ACTIVATING || t == UNIT_RELOADING;
  51 }
  52
  53 static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) {
  54         return t == UNIT_INACTIVE || t == UNIT_FAILED || t == UNIT_DEACTIVATING;
  55 }
  56
  57 static inline bool UNIT_IS_INACTIVE_OR_FAILED(UnitActiveState t) {
  58         return t == UNIT_INACTIVE || t == UNIT_FAILED;
  59 }
  60
  61 #include "job.h"
  62
  63 struct UnitRef {
  64         /* Keeps tracks of references to a unit. This is useful so
  65          * that we can merge two units if necessary and correct all
  66          * references to them */
  67
  68         Unit* unit;
  69         LIST_FIELDS(UnitRef, refs);
  70 };
  71
  72 struct Unit {
  73         Manager *manager;
  74
  75         UnitType type;
  76         UnitLoadState load_state;
  77         Unit *merged_into;
  78
  79         char *id; /* One name is special because we use it for identification. Points to an entry in the names set */
  80         char *instance;
  81
  82         Set *names;
  83         Set *dependencies[_UNIT_DEPENDENCY_MAX];
  84
  85         char **requires_mounts_for;
  86
  87         char *description;
  88         char **documentation;
  89
  90         char *fragment_path; /* if loaded from a config file this is the primary path to it */
  91         char *source_path; /* if converted, the source file */
  92         char **dropin_paths;
  93
  94         usec_t fragment_mtime;
  95         usec_t source_mtime;
  96         usec_t dropin_mtime;
  97
  98         /* If this is a transient unit we are currently writing, this is where we are writing it to */
  99         FILE *transient_file;
 100
 101         /* If there is something to do with this unit, then this is the installed job for it */
 102         Job *job;
 103
 104         /* JOB_NOP jobs are special and can be installed without disturbing the real job. */
 105         Job *nop_job;
 106
 107         /* The slot used for watching NameOwnerChanged signals */
 108         sd_bus_slot *match_bus_slot;
 109
 110         /* Job timeout and action to take */
 111         usec_t job_timeout;
 112         FailureAction job_timeout_action;
 113         char *job_timeout_reboot_arg;
 114
 115         /* References to this */
 116         LIST_HEAD(UnitRef, refs);
 117
 118         /* Conditions to check */
 119         LIST_HEAD(Condition, conditions);
 120         LIST_HEAD(Condition, asserts);
 121
 122         dual_timestamp condition_timestamp;
 123         dual_timestamp assert_timestamp;
 124
 125         /* Updated whenever the low-level state changes */
 126         dual_timestamp state_change_timestamp;
 127
 128         /* Updated whenever the (high-level) active state enters or leaves the active or inactive states */
 129         dual_timestamp inactive_exit_timestamp;
 130         dual_timestamp active_enter_timestamp;
 131         dual_timestamp active_exit_timestamp;
 132         dual_timestamp inactive_enter_timestamp;
 133
 134         UnitRef slice;
 135
 136         /* Per type list */
 137         LIST_FIELDS(Unit, units_by_type);
 138
 139         /* All units which have requires_mounts_for set */
 140         LIST_FIELDS(Unit, has_requires_mounts_for);
 141
 142         /* Load queue */
 143         LIST_FIELDS(Unit, load_queue);
 144
 145         /* D-Bus queue */
 146         LIST_FIELDS(Unit, dbus_queue);
 147
 148         /* Cleanup queue */
 149         LIST_FIELDS(Unit, cleanup_queue);
 150
 151         /* GC queue */
 152         LIST_FIELDS(Unit, gc_queue);
 153
 154         /* CGroup realize members queue */
 155         LIST_FIELDS(Unit, cgroup_queue);
 156
 157         /* Units with the same CGroup netclass */
 158         LIST_FIELDS(Unit, cgroup_netclass);
 159
 160         /* PIDs we keep an eye on. Note that a unit might have many
 161          * more, but these are the ones we care enough about to
 162          * process SIGCHLD for */
 163         Set *pids;
 164
 165         /* Used during GC sweeps */
 166         unsigned gc_marker;
 167
 168         /* Error code when we didn't manage to load the unit (negative) */
 169         int load_error;
 170
 171         /* Put a ratelimit on unit starting */
 172         RateLimit start_limit;
 173         FailureAction start_limit_action;
 174         char *reboot_arg;
 175
 176         /* Make sure we never enter endless loops with the check unneeded logic, or the BindsTo= logic */
 177         RateLimit auto_stop_ratelimit;
 178
 179         /* Cached unit file state and preset */
 180         UnitFileState unit_file_state;
 181         int unit_file_preset;
 182
 183         /* Where the cpuacct.usage cgroup counter was at the time the unit was started */
 184         nsec_t cpuacct_usage_base;
 185
 186         /* Counterparts in the cgroup filesystem */
 187         char *cgroup_path;
 188         CGroupMask cgroup_realized_mask;
 189         CGroupMask cgroup_enabled_mask;
 190         CGroupMask cgroup_subtree_mask;
 191         CGroupMask cgroup_members_mask;
 192         int cgroup_inotify_wd;
 193
 194         uint32_t cgroup_netclass_id;
 195
 196         /* How to start OnFailure units */
 197         JobMode on_failure_job_mode;
 198
 199         /* Garbage collect us we nobody wants or requires us anymore */
 200         bool stop_when_unneeded;
 201
 202         /* Create default dependencies */
 203         bool default_dependencies;
 204
 205         /* Refuse manual starting, allow starting only indirectly via dependency. */
 206         bool refuse_manual_start;
 207
 208         /* Don't allow the user to stop this unit manually, allow stopping only indirectly via dependency. */
 209         bool refuse_manual_stop;
 210
 211         /* Allow isolation requests */
 212         bool allow_isolate;
 213
 214         /* Ignore this unit when isolating */
 215         bool ignore_on_isolate;
 216
 217         /* Did the last condition check succeed? */
 218         bool condition_result;
 219         bool assert_result;
 220
 221         /* Is this a transient unit? */
 222         bool transient;
 223
 224         bool in_load_queue:1;
 225         bool in_dbus_queue:1;
 226         bool in_cleanup_queue:1;
 227         bool in_gc_queue:1;
 228         bool in_cgroup_queue:1;
 229
 230         bool sent_dbus_new_signal:1;
 231
 232         bool no_gc:1;
 233
 234         bool in_audit:1;
 235
 236         bool cgroup_realized:1;
 237         bool cgroup_members_mask_valid:1;
 238         bool cgroup_subtree_mask_valid:1;
 239
 240         bool start_limit_hit:1;
 241
 242         /* Did we already invoke unit_coldplug() for this unit? */
 243         bool coldplugged:1;
 244 };
 245
 246 struct UnitStatusMessageFormats {
 247         const char *starting_stopping[2];
 248         const char *finished_start_job[_JOB_RESULT_MAX];
 249         const char *finished_stop_job[_JOB_RESULT_MAX];
 250 };
 251
 252 typedef enum UnitSetPropertiesMode {
 253         UNIT_CHECK = 0,
 254         UNIT_RUNTIME = 1,
 255         UNIT_PERSISTENT = 2,
 256 } UnitSetPropertiesMode;
 257
 258 #include "automount.h"
 259 #include "busname.h"
 260 #include "device.h"
 261 #include "path.h"
 262 #include "scope.h"
 263 #include "slice.h"
 264 #include "socket.h"
 265 #include "swap.h"
 266 #include "target.h"
 267 #include "timer.h"
 268
 269 struct UnitVTable {
 270         /* How much memory does an object of this unit type need */
 271         size_t object_size;
 272
 273         /* If greater than 0, the offset into the object where
 274          * ExecContext is found, if the unit type has that */
 275         size_t exec_context_offset;
 276
 277         /* If greater than 0, the offset into the object where
 278          * CGroupContext is found, if the unit type has that */
 279         size_t cgroup_context_offset;
 280
 281         /* If greater than 0, the offset into the object where
 282          * KillContext is found, if the unit type has that */
 283         size_t kill_context_offset;
 284
 285         /* If greater than 0, the offset into the object where the
 286          * pointer to ExecRuntime is found, if the unit type has
 287          * that */
 288         size_t exec_runtime_offset;
 289
 290         /* The name of the configuration file section with the private settings of this unit */
 291         const char *private_section;
 292
 293         /* Config file sections this unit type understands, separated
 294          * by NUL chars */
 295         const char *sections;
 296
 297         /* This should reset all type-specific variables. This should
 298          * not allocate memory, and is called with zero-initialized
 299          * data. It should hence only initialize variables that need
 300          * to be set != 0. */
 301         void (*init)(Unit *u);
 302
 303         /* This should free all type-specific variables. It should be
 304          * idempotent. */
 305         void (*done)(Unit *u);
 306
 307         /* Actually load data from disk. This may fail, and should set
 308          * load_state to UNIT_LOADED, UNIT_MERGED or leave it at
 309          * UNIT_STUB if no configuration could be found. */
 310         int (*load)(Unit *u);
 311
 312         /* If a lot of units got created via enumerate(), this is
 313          * where to actually set the state and call unit_notify(). */
 314         int (*coldplug)(Unit *u);
 315
 316         void (*dump)(Unit *u, FILE *f, const char *prefix);
 317
 318         int (*start)(Unit *u);
 319         int (*stop)(Unit *u);
 320         int (*reload)(Unit *u);
 321
 322         int (*kill)(Unit *u, KillWho w, int signo, sd_bus_error *error);
 323
 324         bool (*can_reload)(Unit *u);
 325
 326         /* Write all data that cannot be restored from other sources
 327          * away using unit_serialize_item() */
 328         int (*serialize)(Unit *u, FILE *f, FDSet *fds);
 329
 330         /* Restore one item from the serialization */
 331         int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
 332
 333         /* Try to match up fds with what we need for this unit */
 334         void (*distribute_fds)(Unit *u, FDSet *fds);
 335
 336         /* Boils down the more complex internal state of this unit to
 337          * a simpler one that the engine can understand */
 338         UnitActiveState (*active_state)(Unit *u);
 339
 340         /* Returns the substate specific to this unit type as
 341          * string. This is purely information so that we can give the
 342          * user a more fine grained explanation in which actual state a
 343          * unit is in. */
 344         const char* (*sub_state_to_string)(Unit *u);
 345
 346         /* Return true when there is reason to keep this entry around
 347          * even nothing references it and it isn't active in any
 348          * way */
 349         bool (*check_gc)(Unit *u);
 350
 351         /* When the unit is not running and no job for it queued we
 352          * shall release its runtime resources */
 353         void (*release_resources)(Unit *u);
 354
 355         /* Invoked on every child that died */
 356         void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
 357
 358         /* Reset failed state if we are in failed state */
 359         void (*reset_failed)(Unit *u);
 360
 361         /* Called whenever any of the cgroups this unit watches for
 362          * ran empty */
 363         void (*notify_cgroup_empty)(Unit *u);
 364
 365         /* Called whenever a process of this unit sends us a message */
 366         void (*notify_message)(Unit *u, pid_t pid, char **tags, FDSet *fds);
 367
 368         /* Called whenever a name this Unit registered for comes or
 369          * goes away. */
 370         void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner);
 371
 372         /* Called for each property that is being set */
 373         int (*bus_set_property)(Unit *u, const char *name, sd_bus_message *message, UnitSetPropertiesMode mode, sd_bus_error *error);
 374
 375         /* Called after at least one property got changed to apply the necessary change */
 376         int (*bus_commit_properties)(Unit *u);
 377
 378         /* Return the unit this unit is following */
 379         Unit *(*following)(Unit *u);
 380
 381         /* Return the set of units that are following each other */
 382         int (*following_set)(Unit *u, Set **s);
 383
 384         /* Invoked each time a unit this unit is triggering changes
 385          * state or gains/loses a job */
 386         void (*trigger_notify)(Unit *u, Unit *trigger);
 387
 388         /* Called whenever CLOCK_REALTIME made a jump */
 389         void (*time_change)(Unit *u);
 390
 391         /* Returns the next timeout of a unit */
 392         int (*get_timeout)(Unit *u, usec_t *timeout);
 393
 394         /* Returns the main PID if there is any defined, or 0. */
 395         pid_t (*main_pid)(Unit *u);
 396
 397         /* Returns the main PID if there is any defined, or 0. */
 398         pid_t (*control_pid)(Unit *u);
 399
 400         /* This is called for each unit type and should be used to
 401          * enumerate existing devices and load them. However,
 402          * everything that is loaded here should still stay in
 403          * inactive state. It is the job of the coldplug() call above
 404          * to put the units into the initial state.  */
 405         void (*enumerate)(Manager *m);
 406
 407         /* Type specific cleanups. */
 408         void (*shutdown)(Manager *m);
 409
 410         /* If this function is set and return false all jobs for units
 411          * of this type will immediately fail. */
 412         bool (*supported)(void);
 413
 414         /* The bus vtable */
 415         const sd_bus_vtable *bus_vtable;
 416
 417         /* The strings to print in status messages */
 418         UnitStatusMessageFormats status_message_formats;
 419
 420         /* True if transient units of this type are OK */
 421         bool can_transient:1;
 422 };
 423
 424 extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
 425
 426 #define UNIT_VTABLE(u) unit_vtable[(u)->type]
 427
 428 /* For casting a unit into the various unit types */
 429 #define DEFINE_CAST(UPPERCASE, MixedCase)                               \
 430         static inline MixedCase* UPPERCASE(Unit *u) {                   \
 431                 if (_unlikely_(!u || u->type != UNIT_##UPPERCASE))      \
 432                         return NULL;                                    \
 433                                                                         \
 434                 return (MixedCase*) u;                                  \
 435         }
 436
 437 /* For casting the various unit types into a unit */
 438 #define UNIT(u) (&(u)->meta)
 439
 440 #define UNIT_HAS_EXEC_CONTEXT(u) (UNIT_VTABLE(u)->exec_context_offset > 0)
 441 #define UNIT_HAS_CGROUP_CONTEXT(u) (UNIT_VTABLE(u)->cgroup_context_offset > 0)
 442 #define UNIT_HAS_KILL_CONTEXT(u) (UNIT_VTABLE(u)->kill_context_offset > 0)
 443
 444 #define UNIT_TRIGGER(u) ((Unit*) set_first((u)->dependencies[UNIT_TRIGGERS]))
 445
 446 DEFINE_CAST(SERVICE, Service);
 447 DEFINE_CAST(SOCKET, Socket);
 448 DEFINE_CAST(BUSNAME, BusName);
 449 DEFINE_CAST(TARGET, Target);
 450 DEFINE_CAST(DEVICE, Device);
 451 DEFINE_CAST(MOUNT, Mount);
 452 DEFINE_CAST(AUTOMOUNT, Automount);
 453 DEFINE_CAST(SWAP, Swap);
 454 DEFINE_CAST(TIMER, Timer);
 455 DEFINE_CAST(PATH, Path);
 456 DEFINE_CAST(SLICE, Slice);
 457 DEFINE_CAST(SCOPE, Scope);
 458
 459 Unit *unit_new(Manager *m, size_t size);
 460 void unit_free(Unit *u);
 461
 462 int unit_add_name(Unit *u, const char *name);
 463
 464 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference);
 465 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference);
 466
 467 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
 468 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
 469
 470 int unit_add_exec_dependencies(Unit *u, ExecContext *c);
 471
 472 int unit_choose_id(Unit *u, const char *name);
 473 int unit_set_description(Unit *u, const char *description);
 474
 475 bool unit_check_gc(Unit *u);
 476
 477 void unit_add_to_load_queue(Unit *u);
 478 void unit_add_to_dbus_queue(Unit *u);
 479 void unit_add_to_cleanup_queue(Unit *u);
 480 void unit_add_to_gc_queue(Unit *u);
 481
 482 int unit_merge(Unit *u, Unit *other);
 483 int unit_merge_by_name(Unit *u, const char *other);
 484
 485 Unit *unit_follow_merge(Unit *u) _pure_;
 486
 487 int unit_load_fragment_and_dropin(Unit *u);
 488 int unit_load_fragment_and_dropin_optional(Unit *u);
 489 int unit_load(Unit *unit);
 490
 491 int unit_set_slice(Unit *u, Unit *slice);
 492 int unit_set_default_slice(Unit *u);
 493
 494 const char *unit_description(Unit *u) _pure_;
 495
 496 bool unit_has_name(Unit *u, const char *name);
 497
 498 UnitActiveState unit_active_state(Unit *u);
 499
 500 const char* unit_sub_state_to_string(Unit *u);
 501
 502 void unit_dump(Unit *u, FILE *f, const char *prefix);
 503
 504 bool unit_can_reload(Unit *u) _pure_;
 505 bool unit_can_start(Unit *u) _pure_;
 506 bool unit_can_isolate(Unit *u) _pure_;
 507
 508 int unit_start(Unit *u);
 509 int unit_stop(Unit *u);
 510 int unit_reload(Unit *u);
 511
 512 int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error);
 513 int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t control_pid, sd_bus_error *error);
 514
 515 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success);
 516
 517 int unit_watch_pid(Unit *u, pid_t pid);
 518 void unit_unwatch_pid(Unit *u, pid_t pid);
 519 void unit_unwatch_all_pids(Unit *u);
 520
 521 void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2);
 522
 523 int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name);
 524 int unit_watch_bus_name(Unit *u, const char *name);
 525 void unit_unwatch_bus_name(Unit *u, const char *name);
 526
 527 bool unit_job_is_applicable(Unit *u, JobType j);
 528
 529 int set_unit_path(const char *p);
 530
 531 char *unit_dbus_path(Unit *u);
 532
 533 int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
 534
 535 bool unit_can_serialize(Unit *u) _pure_;
 536
 537 int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs);
 538 int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
 539
 540 int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
 541 int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value);
 542 int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd);
 543 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(4,5);
 544
 545 int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency d);
 546
 547 int unit_coldplug(Unit *u);
 548
 549 void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0);
 550 void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t);
 551
 552 bool unit_need_daemon_reload(Unit *u);
 553
 554 void unit_reset_failed(Unit *u);
 555
 556 Unit *unit_following(Unit *u);
 557 int unit_following_set(Unit *u, Set **s);
 558
 559 const char *unit_slice_name(Unit *u);
 560
 561 bool unit_stop_pending(Unit *u) _pure_;
 562 bool unit_inactive_or_pending(Unit *u) _pure_;
 563 bool unit_active_or_pending(Unit *u);
 564
 565 int unit_add_default_target_dependency(Unit *u, Unit *target);
 566
 567 void unit_start_on_failure(Unit *u);
 568 void unit_trigger_notify(Unit *u);
 569
 570 UnitFileState unit_get_unit_file_state(Unit *u);
 571 int unit_get_unit_file_preset(Unit *u);
 572
 573 Unit* unit_ref_set(UnitRef *ref, Unit *u);
 574 void unit_ref_unset(UnitRef *ref);
 575
 576 #define UNIT_DEREF(ref) ((ref).unit)
 577 #define UNIT_ISSET(ref) (!!(ref).unit)
 578
 579 int unit_patch_contexts(Unit *u);
 580
 581 ExecContext *unit_get_exec_context(Unit *u) _pure_;
 582 KillContext *unit_get_kill_context(Unit *u) _pure_;
 583 CGroupContext *unit_get_cgroup_context(Unit *u) _pure_;
 584
 585 ExecRuntime *unit_get_exec_runtime(Unit *u) _pure_;
 586
 587 int unit_setup_exec_runtime(Unit *u);
 588
 589 int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
 590 int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
 591
 592 int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
 593 int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
 594
 595 int unit_kill_context(Unit *u, KillContext *c, KillOperation k, pid_t main_pid, pid_t control_pid, bool main_pid_alien);
 596
 597 int unit_make_transient(Unit *u);
 598
 599 int unit_require_mounts_for(Unit *u, const char *path);
 600
 601 bool unit_type_supported(UnitType t);
 602
 603 bool unit_is_pristine(Unit *u);
 604
 605 pid_t unit_control_pid(Unit *u);
 606 pid_t unit_main_pid(Unit *u);
 607
 608 static inline bool unit_supported(Unit *u) {
 609         return unit_type_supported(u->type);
 610 }
 611
 612 void unit_warn_if_dir_nonempty(Unit *u, const char* where);
 613 int unit_fail_if_symlink(Unit *u, const char* where);
 614
 615 int unit_start_limit_test(Unit *u);
 616
 617 /* Macros which append UNIT= or USER_UNIT= to the message */
 618
 619 #define log_unit_full(unit, level, error, ...)                          \
 620         ({                                                              \
 621                 Unit *_u = (unit);                                      \
 622                 _u ? log_object_internal(level, error, __FILE__, __LINE__, __func__, _u->manager->unit_log_field, _u->id, ##__VA_ARGS__) : \
 623                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 624         })
 625
 626 #define log_unit_debug(unit, ...)   log_unit_full(unit, LOG_DEBUG, 0, ##__VA_ARGS__)
 627 #define log_unit_info(unit, ...)    log_unit_full(unit, LOG_INFO, 0, ##__VA_ARGS__)
 628 #define log_unit_notice(unit, ...)  log_unit_full(unit, LOG_NOTICE, 0, ##__VA_ARGS__)
 629 #define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, 0, ##__VA_ARGS__)
 630 #define log_unit_error(unit, ...)   log_unit_full(unit, LOG_ERR, 0, ##__VA_ARGS__)
 631
 632 #define log_unit_debug_errno(unit, error, ...)   log_unit_full(unit, LOG_DEBUG, error, ##__VA_ARGS__)
 633 #define log_unit_info_errno(unit, error, ...)    log_unit_full(unit, LOG_INFO, error, ##__VA_ARGS__)
 634 #define log_unit_notice_errno(unit, error, ...)  log_unit_full(unit, LOG_NOTICE, error, ##__VA_ARGS__)
 635 #define log_unit_warning_errno(unit, error, ...) log_unit_full(unit, LOG_WARNING, error, ##__VA_ARGS__)
 636 #define log_unit_error_errno(unit, error, ...)   log_unit_full(unit, LOG_ERR, error, ##__VA_ARGS__)
 637
 638 #define LOG_UNIT_MESSAGE(unit, fmt, ...) "MESSAGE=%s: " fmt, (unit)->id, ##__VA_ARGS__
 639 #define LOG_UNIT_ID(unit) (unit)->manager->unit_log_format_string, (unit)->id