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_subtree_mask;
 190         CGroupMask cgroup_members_mask;
 191         int cgroup_inotify_wd;
 192
 193         uint32_t cgroup_netclass_id;
 194
 195         /* How to start OnFailure units */
 196         JobMode on_failure_job_mode;
 197
 198         /* Garbage collect us we nobody wants or requires us anymore */
 199         bool stop_when_unneeded;
 200
 201         /* Create default dependencies */
 202         bool default_dependencies;
 203
 204         /* Refuse manual starting, allow starting only indirectly via dependency. */
 205         bool refuse_manual_start;
 206
 207         /* Don't allow the user to stop this unit manually, allow stopping only indirectly via dependency. */
 208         bool refuse_manual_stop;
 209
 210         /* Allow isolation requests */
 211         bool allow_isolate;
 212
 213         /* Ignore this unit when isolating */
 214         bool ignore_on_isolate;
 215
 216         /* Did the last condition check succeed? */
 217         bool condition_result;
 218         bool assert_result;
 219
 220         /* Is this a transient unit? */
 221         bool transient;
 222
 223         bool in_load_queue:1;
 224         bool in_dbus_queue:1;
 225         bool in_cleanup_queue:1;
 226         bool in_gc_queue:1;
 227         bool in_cgroup_queue:1;
 228
 229         bool sent_dbus_new_signal:1;
 230
 231         bool no_gc:1;
 232
 233         bool in_audit:1;
 234
 235         bool cgroup_realized:1;
 236         bool cgroup_members_mask_valid:1;
 237         bool cgroup_subtree_mask_valid:1;
 238
 239         bool start_limit_hit:1;
 240
 241         /* Did we already invoke unit_coldplug() for this unit? */
 242         bool coldplugged:1;
 243 };
 244
 245 struct UnitStatusMessageFormats {
 246         const char *starting_stopping[2];
 247         const char *finished_start_job[_JOB_RESULT_MAX];
 248         const char *finished_stop_job[_JOB_RESULT_MAX];
 249 };
 250
 251 typedef enum UnitSetPropertiesMode {
 252         UNIT_CHECK = 0,
 253         UNIT_RUNTIME = 1,
 254         UNIT_PERSISTENT = 2,
 255 } UnitSetPropertiesMode;
 256
 257 #include "automount.h"
 258 #include "busname.h"
 259 #include "device.h"
 260 #include "path.h"
 261 #include "scope.h"
 262 #include "slice.h"
 263 #include "socket.h"
 264 #include "swap.h"
 265 #include "target.h"
 266 #include "timer.h"
 267
 268 struct UnitVTable {
 269         /* How much memory does an object of this unit type need */
 270         size_t object_size;
 271
 272         /* If greater than 0, the offset into the object where
 273          * ExecContext is found, if the unit type has that */
 274         size_t exec_context_offset;
 275
 276         /* If greater than 0, the offset into the object where
 277          * CGroupContext is found, if the unit type has that */
 278         size_t cgroup_context_offset;
 279
 280         /* If greater than 0, the offset into the object where
 281          * KillContext is found, if the unit type has that */
 282         size_t kill_context_offset;
 283
 284         /* If greater than 0, the offset into the object where the
 285          * pointer to ExecRuntime is found, if the unit type has
 286          * that */
 287         size_t exec_runtime_offset;
 288
 289         /* The name of the configuration file section with the private settings of this unit */
 290         const char *private_section;
 291
 292         /* Config file sections this unit type understands, separated
 293          * by NUL chars */
 294         const char *sections;
 295
 296         /* This should reset all type-specific variables. This should
 297          * not allocate memory, and is called with zero-initialized
 298          * data. It should hence only initialize variables that need
 299          * to be set != 0. */
 300         void (*init)(Unit *u);
 301
 302         /* This should free all type-specific variables. It should be
 303          * idempotent. */
 304         void (*done)(Unit *u);
 305
 306         /* Actually load data from disk. This may fail, and should set
 307          * load_state to UNIT_LOADED, UNIT_MERGED or leave it at
 308          * UNIT_STUB if no configuration could be found. */
 309         int (*load)(Unit *u);
 310
 311         /* If a lot of units got created via enumerate(), this is
 312          * where to actually set the state and call unit_notify(). */
 313         int (*coldplug)(Unit *u);
 314
 315         void (*dump)(Unit *u, FILE *f, const char *prefix);
 316
 317         int (*start)(Unit *u);
 318         int (*stop)(Unit *u);
 319         int (*reload)(Unit *u);
 320
 321         int (*kill)(Unit *u, KillWho w, int signo, sd_bus_error *error);
 322
 323         bool (*can_reload)(Unit *u);
 324
 325         /* Write all data that cannot be restored from other sources
 326          * away using unit_serialize_item() */
 327         int (*serialize)(Unit *u, FILE *f, FDSet *fds);
 328
 329         /* Restore one item from the serialization */
 330         int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
 331
 332         /* Try to match up fds with what we need for this unit */
 333         void (*distribute_fds)(Unit *u, FDSet *fds);
 334
 335         /* Boils down the more complex internal state of this unit to
 336          * a simpler one that the engine can understand */
 337         UnitActiveState (*active_state)(Unit *u);
 338
 339         /* Returns the substate specific to this unit type as
 340          * string. This is purely information so that we can give the
 341          * user a more fine grained explanation in which actual state a
 342          * unit is in. */
 343         const char* (*sub_state_to_string)(Unit *u);
 344
 345         /* Return true when there is reason to keep this entry around
 346          * even nothing references it and it isn't active in any
 347          * way */
 348         bool (*check_gc)(Unit *u);
 349
 350         /* When the unit is not running and no job for it queued we
 351          * shall release its runtime resources */
 352         void (*release_resources)(Unit *u);
 353
 354         /* Invoked on every child that died */
 355         void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
 356
 357         /* Reset failed state if we are in failed state */
 358         void (*reset_failed)(Unit *u);
 359
 360         /* Called whenever any of the cgroups this unit watches for
 361          * ran empty */
 362         void (*notify_cgroup_empty)(Unit *u);
 363
 364         /* Called whenever a process of this unit sends us a message */
 365         void (*notify_message)(Unit *u, pid_t pid, char **tags, FDSet *fds);
 366
 367         /* Called whenever a name this Unit registered for comes or
 368          * goes away. */
 369         void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner);
 370
 371         /* Called for each property that is being set */
 372         int (*bus_set_property)(Unit *u, const char *name, sd_bus_message *message, UnitSetPropertiesMode mode, sd_bus_error *error);
 373
 374         /* Called after at least one property got changed to apply the necessary change */
 375         int (*bus_commit_properties)(Unit *u);
 376
 377         /* Return the unit this unit is following */
 378         Unit *(*following)(Unit *u);
 379
 380         /* Return the set of units that are following each other */
 381         int (*following_set)(Unit *u, Set **s);
 382
 383         /* Invoked each time a unit this unit is triggering changes
 384          * state or gains/loses a job */
 385         void (*trigger_notify)(Unit *u, Unit *trigger);
 386
 387         /* Called whenever CLOCK_REALTIME made a jump */
 388         void (*time_change)(Unit *u);
 389
 390         /* Returns the next timeout of a unit */
 391         int (*get_timeout)(Unit *u, usec_t *timeout);
 392
 393         /* Returns the main PID if there is any defined, or 0. */
 394         pid_t (*main_pid)(Unit *u);
 395
 396         /* Returns the main PID if there is any defined, or 0. */
 397         pid_t (*control_pid)(Unit *u);
 398
 399         /* This is called for each unit type and should be used to
 400          * enumerate existing devices and load them. However,
 401          * everything that is loaded here should still stay in
 402          * inactive state. It is the job of the coldplug() call above
 403          * to put the units into the initial state.  */
 404         void (*enumerate)(Manager *m);
 405
 406         /* Type specific cleanups. */
 407         void (*shutdown)(Manager *m);
 408
 409         /* If this function is set and return false all jobs for units
 410          * of this type will immediately fail. */
 411         bool (*supported)(void);
 412
 413         /* The bus vtable */
 414         const sd_bus_vtable *bus_vtable;
 415
 416         /* The strings to print in status messages */
 417         UnitStatusMessageFormats status_message_formats;
 418
 419         /* Can units of this type have multiple names? */
 420         bool no_alias:1;
 421
 422         /* Instances make no sense for this type */
 423         bool no_instances:1;
 424
 425         /* True if transient units of this type are OK */
 426         bool can_transient:1;
 427 };
 428
 429 extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
 430
 431 #define UNIT_VTABLE(u) unit_vtable[(u)->type]
 432
 433 /* For casting a unit into the various unit types */
 434 #define DEFINE_CAST(UPPERCASE, MixedCase)                               \
 435         static inline MixedCase* UPPERCASE(Unit *u) {                   \
 436                 if (_unlikely_(!u || u->type != UNIT_##UPPERCASE))      \
 437                         return NULL;                                    \
 438                                                                         \
 439                 return (MixedCase*) u;                                  \
 440         }
 441
 442 /* For casting the various unit types into a unit */
 443 #define UNIT(u) (&(u)->meta)
 444
 445 #define UNIT_HAS_EXEC_CONTEXT(u) (UNIT_VTABLE(u)->exec_context_offset > 0)
 446 #define UNIT_HAS_CGROUP_CONTEXT(u) (UNIT_VTABLE(u)->cgroup_context_offset > 0)
 447 #define UNIT_HAS_KILL_CONTEXT(u) (UNIT_VTABLE(u)->kill_context_offset > 0)
 448
 449 #define UNIT_TRIGGER(u) ((Unit*) set_first((u)->dependencies[UNIT_TRIGGERS]))
 450
 451 DEFINE_CAST(SERVICE, Service);
 452 DEFINE_CAST(SOCKET, Socket);
 453 DEFINE_CAST(BUSNAME, BusName);
 454 DEFINE_CAST(TARGET, Target);
 455 DEFINE_CAST(DEVICE, Device);
 456 DEFINE_CAST(MOUNT, Mount);
 457 DEFINE_CAST(AUTOMOUNT, Automount);
 458 DEFINE_CAST(SWAP, Swap);
 459 DEFINE_CAST(TIMER, Timer);
 460 DEFINE_CAST(PATH, Path);
 461 DEFINE_CAST(SLICE, Slice);
 462 DEFINE_CAST(SCOPE, Scope);
 463
 464 Unit *unit_new(Manager *m, size_t size);
 465 void unit_free(Unit *u);
 466
 467 int unit_add_name(Unit *u, const char *name);
 468
 469 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference);
 470 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference);
 471
 472 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
 473 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
 474
 475 int unit_add_exec_dependencies(Unit *u, ExecContext *c);
 476
 477 int unit_choose_id(Unit *u, const char *name);
 478 int unit_set_description(Unit *u, const char *description);
 479
 480 bool unit_check_gc(Unit *u);
 481
 482 void unit_add_to_load_queue(Unit *u);
 483 void unit_add_to_dbus_queue(Unit *u);
 484 void unit_add_to_cleanup_queue(Unit *u);
 485 void unit_add_to_gc_queue(Unit *u);
 486
 487 int unit_merge(Unit *u, Unit *other);
 488 int unit_merge_by_name(Unit *u, const char *other);
 489
 490 Unit *unit_follow_merge(Unit *u) _pure_;
 491
 492 int unit_load_fragment_and_dropin(Unit *u);
 493 int unit_load_fragment_and_dropin_optional(Unit *u);
 494 int unit_load(Unit *unit);
 495
 496 int unit_set_slice(Unit *u, Unit *slice);
 497 int unit_set_default_slice(Unit *u);
 498
 499 const char *unit_description(Unit *u) _pure_;
 500
 501 bool unit_has_name(Unit *u, const char *name);
 502
 503 UnitActiveState unit_active_state(Unit *u);
 504
 505 const char* unit_sub_state_to_string(Unit *u);
 506
 507 void unit_dump(Unit *u, FILE *f, const char *prefix);
 508
 509 bool unit_can_reload(Unit *u) _pure_;
 510 bool unit_can_start(Unit *u) _pure_;
 511 bool unit_can_isolate(Unit *u) _pure_;
 512
 513 int unit_start(Unit *u);
 514 int unit_stop(Unit *u);
 515 int unit_reload(Unit *u);
 516
 517 int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error);
 518 int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t control_pid, sd_bus_error *error);
 519
 520 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success);
 521
 522 int unit_watch_pid(Unit *u, pid_t pid);
 523 void unit_unwatch_pid(Unit *u, pid_t pid);
 524 void unit_unwatch_all_pids(Unit *u);
 525
 526 void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2);
 527
 528 int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name);
 529 int unit_watch_bus_name(Unit *u, const char *name);
 530 void unit_unwatch_bus_name(Unit *u, const char *name);
 531
 532 bool unit_job_is_applicable(Unit *u, JobType j);
 533
 534 int set_unit_path(const char *p);
 535
 536 char *unit_dbus_path(Unit *u);
 537
 538 int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
 539
 540 bool unit_can_serialize(Unit *u) _pure_;
 541
 542 int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs);
 543 int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
 544
 545 int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
 546 int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value);
 547 int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd);
 548 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_(4,5);
 549
 550 int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency d);
 551
 552 int unit_coldplug(Unit *u);
 553
 554 void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) _printf_(3, 0);
 555 void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t);
 556
 557 bool unit_need_daemon_reload(Unit *u);
 558
 559 void unit_reset_failed(Unit *u);
 560
 561 Unit *unit_following(Unit *u);
 562 int unit_following_set(Unit *u, Set **s);
 563
 564 const char *unit_slice_name(Unit *u);
 565
 566 bool unit_stop_pending(Unit *u) _pure_;
 567 bool unit_inactive_or_pending(Unit *u) _pure_;
 568 bool unit_active_or_pending(Unit *u);
 569
 570 int unit_add_default_target_dependency(Unit *u, Unit *target);
 571
 572 void unit_start_on_failure(Unit *u);
 573 void unit_trigger_notify(Unit *u);
 574
 575 UnitFileState unit_get_unit_file_state(Unit *u);
 576 int unit_get_unit_file_preset(Unit *u);
 577
 578 Unit* unit_ref_set(UnitRef *ref, Unit *u);
 579 void unit_ref_unset(UnitRef *ref);
 580
 581 #define UNIT_DEREF(ref) ((ref).unit)
 582 #define UNIT_ISSET(ref) (!!(ref).unit)
 583
 584 int unit_patch_contexts(Unit *u);
 585
 586 ExecContext *unit_get_exec_context(Unit *u) _pure_;
 587 KillContext *unit_get_kill_context(Unit *u) _pure_;
 588 CGroupContext *unit_get_cgroup_context(Unit *u) _pure_;
 589
 590 ExecRuntime *unit_get_exec_runtime(Unit *u) _pure_;
 591
 592 int unit_setup_exec_runtime(Unit *u);
 593
 594 int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
 595 int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
 596
 597 int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data);
 598 int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) _printf_(4,5);
 599
 600 int unit_kill_context(Unit *u, KillContext *c, KillOperation k, pid_t main_pid, pid_t control_pid, bool main_pid_alien);
 601
 602 int unit_make_transient(Unit *u);
 603
 604 int unit_require_mounts_for(Unit *u, const char *path);
 605
 606 bool unit_type_supported(UnitType t);
 607
 608 bool unit_is_pristine(Unit *u);
 609
 610 pid_t unit_control_pid(Unit *u);
 611 pid_t unit_main_pid(Unit *u);
 612
 613 static inline bool unit_supported(Unit *u) {
 614         return unit_type_supported(u->type);
 615 }
 616
 617 void unit_warn_if_dir_nonempty(Unit *u, const char* where);
 618 int unit_fail_if_symlink(Unit *u, const char* where);
 619
 620 /* Macros which append UNIT= or USER_UNIT= to the message */
 621
 622 #define log_unit_full(unit, level, error, ...)                          \
 623         ({                                                              \
 624                 Unit *_u = (unit);                                      \
 625                 _u ? log_object_internal(level, error, __FILE__, __LINE__, __func__, _u->manager->unit_log_field, _u->id, ##__VA_ARGS__) : \
 626                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 627         })
 628
 629 #define log_unit_debug(unit, ...)   log_unit_full(unit, LOG_DEBUG, 0, ##__VA_ARGS__)
 630 #define log_unit_info(unit, ...)    log_unit_full(unit, LOG_INFO, 0, ##__VA_ARGS__)
 631 #define log_unit_notice(unit, ...)  log_unit_full(unit, LOG_NOTICE, 0, ##__VA_ARGS__)
 632 #define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, 0, ##__VA_ARGS__)
 633 #define log_unit_error(unit, ...)   log_unit_full(unit, LOG_ERR, 0, ##__VA_ARGS__)
 634
 635 #define log_unit_debug_errno(unit, error, ...)   log_unit_full(unit, LOG_DEBUG, error, ##__VA_ARGS__)
 636 #define log_unit_info_errno(unit, error, ...)    log_unit_full(unit, LOG_INFO, error, ##__VA_ARGS__)
 637 #define log_unit_notice_errno(unit, error, ...)  log_unit_full(unit, LOG_NOTICE, error, ##__VA_ARGS__)
 638 #define log_unit_warning_errno(unit, error, ...) log_unit_full(unit, LOG_WARNING, error, ##__VA_ARGS__)
 639 #define log_unit_error_errno(unit, error, ...)   log_unit_full(unit, LOG_ERR, error, ##__VA_ARGS__)
 640
 641 #define LOG_UNIT_MESSAGE(unit, fmt, ...) "MESSAGE=%s: " fmt, (unit)->id, ##__VA_ARGS__
 642 #define LOG_UNIT_ID(unit) (unit)->manager->unit_log_format_string, (unit)->id