+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#pragma once
-
-/***
- 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 Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdbool.h>
-
-typedef struct Job Job;
-typedef struct JobDependency JobDependency;
-typedef enum JobType JobType;
-typedef enum JobState JobState;
-typedef enum JobMode JobMode;
-typedef enum JobResult JobResult;
-
-/* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */
-enum JobType {
- JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */
- JOB_VERIFY_ACTIVE,
-
- JOB_STOP,
-
- JOB_RELOAD, /* if running, reload */
-
- /* Note that restarts are first treated like JOB_STOP, but
- * then instead of finishing are patched to become
- * JOB_START. */
- JOB_RESTART, /* If running, stop. Then start unconditionally. */
-
- _JOB_TYPE_MAX_MERGING,
-
- /* JOB_NOP can enter into a transaction, but as it won't pull in
- * any dependencies and it uses the special 'nop_job' slot in Unit,
- * it won't have to merge with anything (except possibly into another
- * JOB_NOP, previously installed). JOB_NOP is special-cased in
- * job_type_is_*() functions so that the transaction can be
- * activated. */
- JOB_NOP = _JOB_TYPE_MAX_MERGING, /* do nothing */
-
- _JOB_TYPE_MAX_IN_TRANSACTION,
-
- /* JOB_TRY_RESTART can never appear in a transaction, because
- * it always collapses into JOB_RESTART or JOB_NOP before entering.
- * Thus we never need to merge it with anything. */
- JOB_TRY_RESTART = _JOB_TYPE_MAX_IN_TRANSACTION, /* if running, stop and then start */
-
- /* JOB_RELOAD_OR_START won't enter into a transaction and cannot result
- * from transaction merging (there's no way for JOB_RELOAD and
- * JOB_START to meet in one transaction). It can result from a merge
- * during job installation, but then it will immediately collapse into
- * one of the two simpler types. */
- JOB_RELOAD_OR_START, /* if running, reload, otherwise start */
-
- _JOB_TYPE_MAX,
- _JOB_TYPE_INVALID = -1
-};
-
-enum JobState {
- JOB_WAITING,
- JOB_RUNNING,
- _JOB_STATE_MAX,
- _JOB_STATE_INVALID = -1
-};
-
-enum JobMode {
- JOB_FAIL, /* Fail if a conflicting job is already queued */
- JOB_REPLACE, /* Replace an existing conflicting job */
- JOB_REPLACE_IRREVERSIBLY,/* Like JOB_REPLACE + produce irreversible jobs */
- JOB_ISOLATE, /* Start a unit, and stop all others */
- JOB_FLUSH, /* Flush out all other queued jobs when queing this one */
- JOB_IGNORE_DEPENDENCIES, /* Ignore both requirement and ordering dependencies */
- JOB_IGNORE_REQUIREMENTS, /* Ignore requirement dependencies */
- _JOB_MODE_MAX,
- _JOB_MODE_INVALID = -1
-};
-
-enum JobResult {
- JOB_DONE, /* Job completed successfully */
- JOB_CANCELED, /* Job canceled by a conflicting job installation or by explicit cancel request */
- JOB_TIMEOUT, /* Job timeout elapsed */
- JOB_FAILED, /* Job failed */
- JOB_DEPENDENCY, /* A required dependency job did not result in JOB_DONE */
- JOB_SKIPPED, /* Negative result of JOB_VERIFY_ACTIVE */
- JOB_INVALID, /* JOB_RELOAD of inactive unit */
- JOB_ASSERT, /* Couldn't start a unit, because an assert didn't hold */
- JOB_UNSUPPORTED, /* Couldn't start a unit, because the unit type is not supported on the system */
- _JOB_RESULT_MAX,
- _JOB_RESULT_INVALID = -1
-};
-
-#include "sd-event.h"
-#include "unit.h"
-#include "list.h"
-
-struct JobDependency {
- /* Encodes that the 'subject' job needs the 'object' job in
- * some way. This structure is used only while building a transaction. */
- Job *subject;
- Job *object;
-
- LIST_FIELDS(JobDependency, subject);
- LIST_FIELDS(JobDependency, object);
-
- bool matters;
- bool conflicts;
-};
-
-struct Job {
- Manager *manager;
- Unit *unit;
-
- LIST_FIELDS(Job, transaction);
- LIST_FIELDS(Job, run_queue);
- LIST_FIELDS(Job, dbus_queue);
-
- LIST_HEAD(JobDependency, subject_list);
- LIST_HEAD(JobDependency, object_list);
-
- /* Used for graph algs as a "I have been here" marker */
- Job* marker;
- unsigned generation;
-
- uint32_t id;
-
- JobType type;
- JobState state;
-
- sd_event_source *timer_event_source;
- usec_t begin_usec;
-
- /*
- * This tracks where to send signals, and also which clients
- * are allowed to call DBus methods on the job (other than
- * root).
- *
- * There can be more than one client, because of job merging.
- */
- sd_bus_track *clients;
- char **deserialized_clients;
-
- JobResult result;
-
- bool installed:1;
- bool in_run_queue:1;
- bool matters_to_anchor:1;
- bool override:1;
- bool in_dbus_queue:1;
- bool sent_dbus_new_signal:1;
- bool ignore_order:1;
- bool irreversible:1;
-};
-
-Job* job_new(Unit *unit, JobType type);
-Job* job_new_raw(Unit *unit);
-void job_free(Job *job);
-Job* job_install(Job *j);
-int job_install_deserialized(Job *j);
-void job_uninstall(Job *j);
-void job_dump(Job *j, FILE*f, const char *prefix);
-int job_serialize(Job *j, FILE *f, FDSet *fds);
-int job_deserialize(Job *j, FILE *f, FDSet *fds);
-int job_coldplug(Job *j);
-
-JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts);
-void job_dependency_free(JobDependency *l);
-
-int job_merge(Job *j, Job *other);
-
-JobType job_type_lookup_merge(JobType a, JobType b) _pure_;
-
-_pure_ static inline bool job_type_is_mergeable(JobType a, JobType b) {
- return job_type_lookup_merge(a, b) >= 0;
-}
-
-_pure_ static inline bool job_type_is_conflicting(JobType a, JobType b) {
- return a != JOB_NOP && b != JOB_NOP && !job_type_is_mergeable(a, b);
-}
-
-_pure_ static inline bool job_type_is_superset(JobType a, JobType b) {
- /* Checks whether operation a is a "superset" of b in its actions */
- if (b == JOB_NOP)
- return true;
- if (a == JOB_NOP)
- return false;
- return a == job_type_lookup_merge(a, b);
-}
-
-bool job_type_is_redundant(JobType a, UnitActiveState b) _pure_;
-
-/* Collapses a state-dependent job type into a simpler type by observing
- * the state of the unit which it is going to be applied to. */
-void job_type_collapse(JobType *t, Unit *u);
-
-int job_type_merge_and_collapse(JobType *a, JobType b, Unit *u);
-
-void job_add_to_run_queue(Job *j);
-void job_add_to_dbus_queue(Job *j);
-
-int job_start_timer(Job *j);
-
-int job_run_and_invalidate(Job *j);
-int job_finish_and_invalidate(Job *j, JobResult result, bool recursive);
-
-char *job_dbus_path(Job *j);
-
-void job_shutdown_magic(Job *j);
-
-const char* job_type_to_string(JobType t) _const_;
-JobType job_type_from_string(const char *s) _pure_;
-
-const char* job_state_to_string(JobState t) _const_;
-JobState job_state_from_string(const char *s) _pure_;
-
-const char* job_mode_to_string(JobMode t) _const_;
-JobMode job_mode_from_string(const char *s) _pure_;
-
-const char* job_result_to_string(JobResult t) _const_;
-JobResult job_result_from_string(const char *s) _pure_;
-
-int job_get_timeout(Job *j, uint64_t *timeout) _pure_;
~ianmdlvl / elogind.git / blobdiff