diff options
Diffstat (limited to 'src/core/job.c')
| -rw-r--r-- | src/core/job.c | 1263 |
1 files changed, 0 insertions, 1263 deletions
diff --git a/src/core/job.c b/src/core/job.c deleted file mode 100644 index ac6910a906..0000000000 --- a/src/core/job.c +++ /dev/null @@ -1,1263 +0,0 @@ -/*** - 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 <errno.h> - -#include "sd-id128.h" -#include "sd-messages.h" - -#include "alloc-util.h" -#include "async.h" -#include "dbus-job.h" -#include "dbus.h" -#include "escape.h" -#include "job.h" -#include "log.h" -#include "macro.h" -#include "parse-util.h" -#include "set.h" -#include "special.h" -#include "stdio-util.h" -#include "string-table.h" -#include "string-util.h" -#include "strv.h" -#include "terminal-util.h" -#include "unit.h" -#include "virt.h" - -Job* job_new_raw(Unit *unit) { - Job *j; - - /* used for deserialization */ - - assert(unit); - - j = new0(Job, 1); - if (!j) - return NULL; - - j->manager = unit->manager; - j->unit = unit; - j->type = _JOB_TYPE_INVALID; - - return j; -} - -Job* job_new(Unit *unit, JobType type) { - Job *j; - - assert(type < _JOB_TYPE_MAX); - - j = job_new_raw(unit); - if (!j) - return NULL; - - j->id = j->manager->current_job_id++; - j->type = type; - - /* We don't link it here, that's what job_dependency() is for */ - - return j; -} - -void job_free(Job *j) { - assert(j); - assert(!j->installed); - assert(!j->transaction_prev); - assert(!j->transaction_next); - assert(!j->subject_list); - assert(!j->object_list); - - if (j->in_run_queue) - LIST_REMOVE(run_queue, j->manager->run_queue, j); - - if (j->in_dbus_queue) - LIST_REMOVE(dbus_queue, j->manager->dbus_job_queue, j); - - sd_event_source_unref(j->timer_event_source); - - sd_bus_track_unref(j->clients); - strv_free(j->deserialized_clients); - - free(j); -} - -static void job_set_state(Job *j, JobState state) { - assert(j); - assert(state >= 0); - assert(state < _JOB_STATE_MAX); - - if (j->state == state) - return; - - j->state = state; - - if (!j->installed) - return; - - if (j->state == JOB_RUNNING) - j->unit->manager->n_running_jobs++; - else { - assert(j->state == JOB_WAITING); - assert(j->unit->manager->n_running_jobs > 0); - - j->unit->manager->n_running_jobs--; - - if (j->unit->manager->n_running_jobs <= 0) - j->unit->manager->jobs_in_progress_event_source = sd_event_source_unref(j->unit->manager->jobs_in_progress_event_source); - } -} - -void job_uninstall(Job *j) { - Job **pj; - - assert(j->installed); - - job_set_state(j, JOB_WAITING); - - pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job; - assert(*pj == j); - - /* Detach from next 'bigger' objects */ - - /* daemon-reload should be transparent to job observers */ - if (!MANAGER_IS_RELOADING(j->manager)) - bus_job_send_removed_signal(j); - - *pj = NULL; - - unit_add_to_gc_queue(j->unit); - - hashmap_remove(j->manager->jobs, UINT32_TO_PTR(j->id)); - j->installed = false; -} - -static bool job_type_allows_late_merge(JobType t) { - /* Tells whether it is OK to merge a job of type 't' with an already - * running job. - * Reloads cannot be merged this way. Think of the sequence: - * 1. Reload of a daemon is in progress; the daemon has already loaded - * its config file, but hasn't completed the reload operation yet. - * 2. Edit foo's config file. - * 3. Trigger another reload to have the daemon use the new config. - * Should the second reload job be merged into the first one, the daemon - * would not know about the new config. - * JOB_RESTART jobs on the other hand can be merged, because they get - * patched into JOB_START after stopping the unit. So if we see a - * JOB_RESTART running, it means the unit hasn't stopped yet and at - * this time the merge is still allowed. */ - return t != JOB_RELOAD; -} - -static void job_merge_into_installed(Job *j, Job *other) { - assert(j->installed); - assert(j->unit == other->unit); - - if (j->type != JOB_NOP) - job_type_merge_and_collapse(&j->type, other->type, j->unit); - else - assert(other->type == JOB_NOP); - - j->irreversible = j->irreversible || other->irreversible; - j->ignore_order = j->ignore_order || other->ignore_order; -} - -Job* job_install(Job *j) { - Job **pj; - Job *uj; - - assert(!j->installed); - assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION); - assert(j->state == JOB_WAITING); - - pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job; - uj = *pj; - - if (uj) { - if (job_type_is_conflicting(uj->type, j->type)) - job_finish_and_invalidate(uj, JOB_CANCELED, false, false); - else { - /* not conflicting, i.e. mergeable */ - - if (uj->state == JOB_WAITING || - (job_type_allows_late_merge(j->type) && job_type_is_superset(uj->type, j->type))) { - job_merge_into_installed(uj, j); - log_unit_debug(uj->unit, - "Merged into installed job %s/%s as %u", - uj->unit->id, job_type_to_string(uj->type), (unsigned) uj->id); - return uj; - } else { - /* already running and not safe to merge into */ - /* Patch uj to become a merged job and re-run it. */ - /* XXX It should be safer to queue j to run after uj finishes, but it is - * not currently possible to have more than one installed job per unit. */ - job_merge_into_installed(uj, j); - log_unit_debug(uj->unit, - "Merged into running job, re-running: %s/%s as %u", - uj->unit->id, job_type_to_string(uj->type), (unsigned) uj->id); - - job_set_state(uj, JOB_WAITING); - return uj; - } - } - } - - /* Install the job */ - *pj = j; - j->installed = true; - - j->manager->n_installed_jobs++; - log_unit_debug(j->unit, - "Installed new job %s/%s as %u", - j->unit->id, job_type_to_string(j->type), (unsigned) j->id); - return j; -} - -int job_install_deserialized(Job *j) { - Job **pj; - - assert(!j->installed); - - if (j->type < 0 || j->type >= _JOB_TYPE_MAX_IN_TRANSACTION) { - log_debug("Invalid job type %s in deserialization.", strna(job_type_to_string(j->type))); - return -EINVAL; - } - - pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job; - if (*pj) { - log_unit_debug(j->unit, "Unit already has a job installed. Not installing deserialized job."); - return -EEXIST; - } - - *pj = j; - j->installed = true; - - if (j->state == JOB_RUNNING) - j->unit->manager->n_running_jobs++; - - log_unit_debug(j->unit, - "Reinstalled deserialized job %s/%s as %u", - j->unit->id, job_type_to_string(j->type), (unsigned) j->id); - return 0; -} - -JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts) { - JobDependency *l; - - assert(object); - - /* Adds a new job link, which encodes that the 'subject' job - * needs the 'object' job in some way. If 'subject' is NULL - * this means the 'anchor' job (i.e. the one the user - * explicitly asked for) is the requester. */ - - if (!(l = new0(JobDependency, 1))) - return NULL; - - l->subject = subject; - l->object = object; - l->matters = matters; - l->conflicts = conflicts; - - if (subject) - LIST_PREPEND(subject, subject->subject_list, l); - - LIST_PREPEND(object, object->object_list, l); - - return l; -} - -void job_dependency_free(JobDependency *l) { - assert(l); - - if (l->subject) - LIST_REMOVE(subject, l->subject->subject_list, l); - - LIST_REMOVE(object, l->object->object_list, l); - - free(l); -} - -void job_dump(Job *j, FILE*f, const char *prefix) { - assert(j); - assert(f); - - if (!prefix) - prefix = ""; - - fprintf(f, - "%s-> Job %u:\n" - "%s\tAction: %s -> %s\n" - "%s\tState: %s\n" - "%s\tIrreversible: %s\n", - prefix, j->id, - prefix, j->unit->id, job_type_to_string(j->type), - prefix, job_state_to_string(j->state), - prefix, yes_no(j->irreversible)); -} - -/* - * Merging is commutative, so imagine the matrix as symmetric. We store only - * its lower triangle to avoid duplication. We don't store the main diagonal, - * because A merged with A is simply A. - * - * If the resulting type is collapsed immediately afterwards (to get rid of - * the JOB_RELOAD_OR_START, which lies outside the lookup function's domain), - * the following properties hold: - * - * Merging is associative! A merged with B, and then merged with C is the same - * as A merged with the result of B merged with C. - * - * Mergeability is transitive! If A can be merged with B and B with C then - * A also with C. - * - * Also, if A merged with B cannot be merged with C, then either A or B cannot - * be merged with C either. - */ -static const JobType job_merging_table[] = { -/* What \ With * JOB_START JOB_VERIFY_ACTIVE JOB_STOP JOB_RELOAD */ -/*********************************************************************************/ -/*JOB_START */ -/*JOB_VERIFY_ACTIVE */ JOB_START, -/*JOB_STOP */ -1, -1, -/*JOB_RELOAD */ JOB_RELOAD_OR_START, JOB_RELOAD, -1, -/*JOB_RESTART */ JOB_RESTART, JOB_RESTART, -1, JOB_RESTART, -}; - -JobType job_type_lookup_merge(JobType a, JobType b) { - assert_cc(ELEMENTSOF(job_merging_table) == _JOB_TYPE_MAX_MERGING * (_JOB_TYPE_MAX_MERGING - 1) / 2); - assert(a >= 0 && a < _JOB_TYPE_MAX_MERGING); - assert(b >= 0 && b < _JOB_TYPE_MAX_MERGING); - - if (a == b) - return a; - - if (a < b) { - JobType tmp = a; - a = b; - b = tmp; - } - - return job_merging_table[(a - 1) * a / 2 + b]; -} - -bool job_type_is_redundant(JobType a, UnitActiveState b) { - switch (a) { - - case JOB_START: - return - b == UNIT_ACTIVE || - b == UNIT_RELOADING; - - case JOB_STOP: - return - b == UNIT_INACTIVE || - b == UNIT_FAILED; - - case JOB_VERIFY_ACTIVE: - return - b == UNIT_ACTIVE || - b == UNIT_RELOADING; - - case JOB_RELOAD: - return - b == UNIT_RELOADING; - - case JOB_RESTART: - return - b == UNIT_ACTIVATING; - - case JOB_NOP: - return true; - - default: - assert_not_reached("Invalid job type"); - } -} - -JobType job_type_collapse(JobType t, Unit *u) { - UnitActiveState s; - - switch (t) { - - case JOB_TRY_RESTART: - s = unit_active_state(u); - if (UNIT_IS_INACTIVE_OR_DEACTIVATING(s)) - return JOB_NOP; - - return JOB_RESTART; - - case JOB_TRY_RELOAD: - s = unit_active_state(u); - if (UNIT_IS_INACTIVE_OR_DEACTIVATING(s)) - return JOB_NOP; - - return JOB_RELOAD; - - case JOB_RELOAD_OR_START: - s = unit_active_state(u); - if (UNIT_IS_INACTIVE_OR_DEACTIVATING(s)) - return JOB_START; - - return JOB_RELOAD; - - default: - return t; - } -} - -int job_type_merge_and_collapse(JobType *a, JobType b, Unit *u) { - JobType t; - - t = job_type_lookup_merge(*a, b); - if (t < 0) - return -EEXIST; - - *a = job_type_collapse(t, u); - return 0; -} - -static bool job_is_runnable(Job *j) { - Iterator i; - Unit *other; - - assert(j); - assert(j->installed); - - /* Checks whether there is any job running for the units this - * job needs to be running after (in the case of a 'positive' - * job type) or before (in the case of a 'negative' job - * type. */ - - /* Note that unit types have a say in what is runnable, - * too. For example, if they return -EAGAIN from - * unit_start() they can indicate they are not - * runnable yet. */ - - /* First check if there is an override */ - if (j->ignore_order) - return true; - - if (j->type == JOB_NOP) - return true; - - if (j->type == JOB_START || - j->type == JOB_VERIFY_ACTIVE || - j->type == JOB_RELOAD) { - - /* Immediate result is that the job is or might be - * started. In this case let's wait for the - * dependencies, regardless whether they are - * starting or stopping something. */ - - SET_FOREACH(other, j->unit->dependencies[UNIT_AFTER], i) - if (other->job) - return false; - } - - /* Also, if something else is being stopped and we should - * change state after it, then let's wait. */ - - SET_FOREACH(other, j->unit->dependencies[UNIT_BEFORE], i) - if (other->job && - (other->job->type == JOB_STOP || - other->job->type == JOB_RESTART)) - return false; - - /* This means that for a service a and a service b where b - * shall be started after a: - * - * start a + start b → 1st step start a, 2nd step start b - * start a + stop b → 1st step stop b, 2nd step start a - * stop a + start b → 1st step stop a, 2nd step start b - * stop a + stop b → 1st step stop b, 2nd step stop a - * - * This has the side effect that restarts are properly - * synchronized too. */ - - return true; -} - -static void job_change_type(Job *j, JobType newtype) { - assert(j); - - log_unit_debug(j->unit, - "Converting job %s/%s -> %s/%s", - j->unit->id, job_type_to_string(j->type), - j->unit->id, job_type_to_string(newtype)); - - j->type = newtype; -} - -static int job_perform_on_unit(Job **j) { - uint32_t id; - Manager *m; - JobType t; - Unit *u; - int r; - - /* While we execute this operation the job might go away (for - * example: because it finishes immediately or is replaced by - * a new, conflicting job.) To make sure we don't access a - * freed job later on we store the id here, so that we can - * verify the job is still valid. */ - - assert(j); - assert(*j); - - m = (*j)->manager; - u = (*j)->unit; - t = (*j)->type; - id = (*j)->id; - - switch (t) { - case JOB_START: - r = unit_start(u); - break; - - case JOB_RESTART: - t = JOB_STOP; - /* fall through */ - case JOB_STOP: - r = unit_stop(u); - break; - - case JOB_RELOAD: - r = unit_reload(u); - break; - - default: - assert_not_reached("Invalid job type"); - } - - /* Log if the job still exists and the start/stop/reload function - * actually did something. */ - *j = manager_get_job(m, id); - if (*j && r > 0) - unit_status_emit_starting_stopping_reloading(u, t); - - return r; -} - -int job_run_and_invalidate(Job *j) { - int r; - - assert(j); - assert(j->installed); - assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION); - assert(j->in_run_queue); - - LIST_REMOVE(run_queue, j->manager->run_queue, j); - j->in_run_queue = false; - - if (j->state != JOB_WAITING) - return 0; - - if (!job_is_runnable(j)) - return -EAGAIN; - - job_set_state(j, JOB_RUNNING); - job_add_to_dbus_queue(j); - - - switch (j->type) { - - case JOB_VERIFY_ACTIVE: { - UnitActiveState t = unit_active_state(j->unit); - if (UNIT_IS_ACTIVE_OR_RELOADING(t)) - r = -EALREADY; - else if (t == UNIT_ACTIVATING) - r = -EAGAIN; - else - r = -EBADR; - break; - } - - case JOB_START: - case JOB_STOP: - case JOB_RESTART: - r = job_perform_on_unit(&j); - - /* If the unit type does not support starting/stopping, - * then simply wait. */ - if (r == -EBADR) - r = 0; - break; - - case JOB_RELOAD: - r = job_perform_on_unit(&j); - break; - - case JOB_NOP: - r = -EALREADY; - break; - - default: - assert_not_reached("Unknown job type"); - } - - if (j) { - if (r == -EALREADY) - r = job_finish_and_invalidate(j, JOB_DONE, true, true); - else if (r == -EBADR) - r = job_finish_and_invalidate(j, JOB_SKIPPED, true, false); - else if (r == -ENOEXEC) - r = job_finish_and_invalidate(j, JOB_INVALID, true, false); - else if (r == -EPROTO) - r = job_finish_and_invalidate(j, JOB_ASSERT, true, false); - else if (r == -EOPNOTSUPP) - r = job_finish_and_invalidate(j, JOB_UNSUPPORTED, true, false); - else if (r == -EAGAIN) - job_set_state(j, JOB_WAITING); - else if (r < 0) - r = job_finish_and_invalidate(j, JOB_FAILED, true, false); - } - - return r; -} - -_pure_ static const char *job_get_status_message_format(Unit *u, JobType t, JobResult result) { - - static const char *const generic_finished_start_job[_JOB_RESULT_MAX] = { - [JOB_DONE] = "Started %s.", - [JOB_TIMEOUT] = "Timed out starting %s.", - [JOB_FAILED] = "Failed to start %s.", - [JOB_DEPENDENCY] = "Dependency failed for %s.", - [JOB_ASSERT] = "Assertion failed for %s.", - [JOB_UNSUPPORTED] = "Starting of %s not supported.", - }; - static const char *const generic_finished_stop_job[_JOB_RESULT_MAX] = { - [JOB_DONE] = "Stopped %s.", - [JOB_FAILED] = "Stopped (with error) %s.", - [JOB_TIMEOUT] = "Timed out stopping %s.", - }; - static const char *const generic_finished_reload_job[_JOB_RESULT_MAX] = { - [JOB_DONE] = "Reloaded %s.", - [JOB_FAILED] = "Reload failed for %s.", - [JOB_TIMEOUT] = "Timed out reloading %s.", - }; - /* When verify-active detects the unit is inactive, report it. - * Most likely a DEPEND warning from a requisiting unit will - * occur next and it's nice to see what was requisited. */ - static const char *const generic_finished_verify_active_job[_JOB_RESULT_MAX] = { - [JOB_SKIPPED] = "%s is not active.", - }; - - const UnitStatusMessageFormats *format_table; - const char *format; - - assert(u); - assert(t >= 0); - assert(t < _JOB_TYPE_MAX); - - if (IN_SET(t, JOB_START, JOB_STOP, JOB_RESTART)) { - format_table = &UNIT_VTABLE(u)->status_message_formats; - if (format_table) { - format = t == JOB_START ? format_table->finished_start_job[result] : - format_table->finished_stop_job[result]; - if (format) - return format; - } - } - - /* Return generic strings */ - if (t == JOB_START) - return generic_finished_start_job[result]; - else if (t == JOB_STOP || t == JOB_RESTART) - return generic_finished_stop_job[result]; - else if (t == JOB_RELOAD) - return generic_finished_reload_job[result]; - else if (t == JOB_VERIFY_ACTIVE) - return generic_finished_verify_active_job[result]; - - return NULL; -} - -static void job_print_status_message(Unit *u, JobType t, JobResult result) { - static const struct { - const char *color, *word; - } const statuses[_JOB_RESULT_MAX] = { - [JOB_DONE] = { ANSI_GREEN, " OK " }, - [JOB_TIMEOUT] = { ANSI_HIGHLIGHT_RED, " TIME " }, - [JOB_FAILED] = { ANSI_HIGHLIGHT_RED, "FAILED" }, - [JOB_DEPENDENCY] = { ANSI_HIGHLIGHT_YELLOW, "DEPEND" }, - [JOB_SKIPPED] = { ANSI_HIGHLIGHT, " INFO " }, - [JOB_ASSERT] = { ANSI_HIGHLIGHT_YELLOW, "ASSERT" }, - [JOB_UNSUPPORTED] = { ANSI_HIGHLIGHT_YELLOW, "UNSUPP" }, - }; - - const char *format; - const char *status; - - assert(u); - assert(t >= 0); - assert(t < _JOB_TYPE_MAX); - - /* Reload status messages have traditionally not been printed to console. */ - if (t == JOB_RELOAD) - return; - - format = job_get_status_message_format(u, t, result); - if (!format) - return; - - if (log_get_show_color()) - status = strjoina(statuses[result].color, statuses[result].word, ANSI_NORMAL); - else - status = statuses[result].word; - - if (result != JOB_DONE) - manager_flip_auto_status(u->manager, true); - - DISABLE_WARNING_FORMAT_NONLITERAL; - unit_status_printf(u, status, format); - REENABLE_WARNING; - - if (t == JOB_START && result == JOB_FAILED) { - _cleanup_free_ char *quoted; - - quoted = shell_maybe_quote(u->id); - manager_status_printf(u->manager, STATUS_TYPE_NORMAL, NULL, "See 'systemctl status %s' for details.", strna(quoted)); - } -} - -static void job_log_status_message(Unit *u, JobType t, JobResult result) { - const char *format; - char buf[LINE_MAX]; - sd_id128_t mid; - static const int job_result_log_level[_JOB_RESULT_MAX] = { - [JOB_DONE] = LOG_INFO, - [JOB_CANCELED] = LOG_INFO, - [JOB_TIMEOUT] = LOG_ERR, - [JOB_FAILED] = LOG_ERR, - [JOB_DEPENDENCY] = LOG_WARNING, - [JOB_SKIPPED] = LOG_NOTICE, - [JOB_INVALID] = LOG_INFO, - [JOB_ASSERT] = LOG_WARNING, - [JOB_UNSUPPORTED] = LOG_WARNING, - }; - - assert(u); - assert(t >= 0); - assert(t < _JOB_TYPE_MAX); - - /* Skip this if it goes to the console. since we already print - * to the console anyway... */ - - if (log_on_console()) - return; - - format = job_get_status_message_format(u, t, result); - if (!format) - return; - - /* The description might be longer than the buffer, but that's OK, we'll just truncate it here */ - DISABLE_WARNING_FORMAT_NONLITERAL; - snprintf(buf, sizeof(buf), format, unit_description(u)); - REENABLE_WARNING; - - switch (t) { - - case JOB_START: - mid = result == JOB_DONE ? SD_MESSAGE_UNIT_STARTED : SD_MESSAGE_UNIT_FAILED; - break; - - case JOB_RELOAD: - mid = SD_MESSAGE_UNIT_RELOADED; - break; - - case JOB_STOP: - case JOB_RESTART: - mid = SD_MESSAGE_UNIT_STOPPED; - break; - - default: - log_struct(job_result_log_level[result], - LOG_UNIT_ID(u), - LOG_MESSAGE("%s", buf), - "RESULT=%s", job_result_to_string(result), - NULL); - return; - } - - log_struct(job_result_log_level[result], - LOG_MESSAGE_ID(mid), - LOG_UNIT_ID(u), - LOG_MESSAGE("%s", buf), - "RESULT=%s", job_result_to_string(result), - NULL); -} - -static void job_emit_status_message(Unit *u, JobType t, JobResult result) { - - /* No message if the job did not actually do anything due to failed condition. */ - if (t == JOB_START && result == JOB_DONE && !u->condition_result) - return; - - job_log_status_message(u, t, result); - job_print_status_message(u, t, result); -} - -static void job_fail_dependencies(Unit *u, UnitDependency d) { - Unit *other; - Iterator i; - - assert(u); - - SET_FOREACH(other, u->dependencies[d], i) { - Job *j = other->job; - - if (!j) - continue; - if (!IN_SET(j->type, JOB_START, JOB_VERIFY_ACTIVE)) - continue; - - job_finish_and_invalidate(j, JOB_DEPENDENCY, true, false); - } -} - -int job_finish_and_invalidate(Job *j, JobResult result, bool recursive, bool already) { - Unit *u; - Unit *other; - JobType t; - Iterator i; - - assert(j); - assert(j->installed); - assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION); - - u = j->unit; - t = j->type; - - j->result = result; - - log_unit_debug(u, "Job %s/%s finished, result=%s", u->id, job_type_to_string(t), job_result_to_string(result)); - - /* If this job did nothing to respective unit we don't log the status message */ - if (!already) - job_emit_status_message(u, t, result); - - job_add_to_dbus_queue(j); - - /* Patch restart jobs so that they become normal start jobs */ - if (result == JOB_DONE && t == JOB_RESTART) { - - job_change_type(j, JOB_START); - job_set_state(j, JOB_WAITING); - - job_add_to_run_queue(j); - - goto finish; - } - - if (result == JOB_FAILED || result == JOB_INVALID) - j->manager->n_failed_jobs++; - - job_uninstall(j); - job_free(j); - - /* Fail depending jobs on failure */ - if (result != JOB_DONE && recursive) { - if (IN_SET(t, JOB_START, JOB_VERIFY_ACTIVE)) { - job_fail_dependencies(u, UNIT_REQUIRED_BY); - job_fail_dependencies(u, UNIT_REQUISITE_OF); - job_fail_dependencies(u, UNIT_BOUND_BY); - } else if (t == JOB_STOP) - job_fail_dependencies(u, UNIT_CONFLICTED_BY); - } - - /* Trigger OnFailure dependencies that are not generated by - * the unit itself. We don't treat JOB_CANCELED as failure in - * this context. And JOB_FAILURE is already handled by the - * unit itself. */ - if (result == JOB_TIMEOUT || result == JOB_DEPENDENCY) { - log_struct(LOG_NOTICE, - "JOB_TYPE=%s", job_type_to_string(t), - "JOB_RESULT=%s", job_result_to_string(result), - LOG_UNIT_ID(u), - LOG_UNIT_MESSAGE(u, "Job %s/%s failed with result '%s'.", - u->id, - job_type_to_string(t), - job_result_to_string(result)), - NULL); - - unit_start_on_failure(u); - } - - unit_trigger_notify(u); - -finish: - /* Try to start the next jobs that can be started */ - SET_FOREACH(other, u->dependencies[UNIT_AFTER], i) - if (other->job) - job_add_to_run_queue(other->job); - SET_FOREACH(other, u->dependencies[UNIT_BEFORE], i) - if (other->job) - job_add_to_run_queue(other->job); - - manager_check_finished(u->manager); - - return 0; -} - -static int job_dispatch_timer(sd_event_source *s, uint64_t monotonic, void *userdata) { - Job *j = userdata; - Unit *u; - - assert(j); - assert(s == j->timer_event_source); - - log_unit_warning(j->unit, "Job %s/%s timed out.", j->unit->id, job_type_to_string(j->type)); - - u = j->unit; - job_finish_and_invalidate(j, JOB_TIMEOUT, true, false); - - emergency_action(u->manager, u->job_timeout_action, u->job_timeout_reboot_arg, "job timed out"); - - return 0; -} - -int job_start_timer(Job *j) { - int r; - - if (j->timer_event_source) - return 0; - - j->begin_usec = now(CLOCK_MONOTONIC); - - if (j->unit->job_timeout == USEC_INFINITY) - return 0; - - r = sd_event_add_time( - j->manager->event, - &j->timer_event_source, - CLOCK_MONOTONIC, - usec_add(j->begin_usec, j->unit->job_timeout), 0, - job_dispatch_timer, j); - if (r < 0) - return r; - - (void) sd_event_source_set_description(j->timer_event_source, "job-start"); - - return 0; -} - -void job_add_to_run_queue(Job *j) { - assert(j); - assert(j->installed); - - if (j->in_run_queue) - return; - - if (!j->manager->run_queue) - sd_event_source_set_enabled(j->manager->run_queue_event_source, SD_EVENT_ONESHOT); - - LIST_PREPEND(run_queue, j->manager->run_queue, j); - j->in_run_queue = true; -} - -void job_add_to_dbus_queue(Job *j) { - assert(j); - assert(j->installed); - - if (j->in_dbus_queue) - return; - - /* We don't check if anybody is subscribed here, since this - * job might just have been created and not yet assigned to a - * connection/client. */ - - LIST_PREPEND(dbus_queue, j->manager->dbus_job_queue, j); - j->in_dbus_queue = true; -} - -char *job_dbus_path(Job *j) { - char *p; - - assert(j); - - if (asprintf(&p, "/org/freedesktop/systemd1/job/%"PRIu32, j->id) < 0) - return NULL; - - return p; -} - -int job_serialize(Job *j, FILE *f) { - assert(j); - assert(f); - - fprintf(f, "job-id=%u\n", j->id); - fprintf(f, "job-type=%s\n", job_type_to_string(j->type)); - fprintf(f, "job-state=%s\n", job_state_to_string(j->state)); - fprintf(f, "job-irreversible=%s\n", yes_no(j->irreversible)); - fprintf(f, "job-sent-dbus-new-signal=%s\n", yes_no(j->sent_dbus_new_signal)); - fprintf(f, "job-ignore-order=%s\n", yes_no(j->ignore_order)); - - if (j->begin_usec > 0) - fprintf(f, "job-begin="USEC_FMT"\n", j->begin_usec); - - bus_track_serialize(j->clients, f, "subscribed"); - - /* End marker */ - fputc('\n', f); - return 0; -} - -int job_deserialize(Job *j, FILE *f) { - assert(j); - assert(f); - - for (;;) { - char line[LINE_MAX], *l, *v; - size_t k; - - if (!fgets(line, sizeof(line), f)) { - if (feof(f)) - return 0; - return -errno; - } - - char_array_0(line); - l = strstrip(line); - - /* End marker */ - if (l[0] == 0) - return 0; - - k = strcspn(l, "="); - - if (l[k] == '=') { - l[k] = 0; - v = l+k+1; - } else - v = l+k; - - if (streq(l, "job-id")) { - - if (safe_atou32(v, &j->id) < 0) - log_debug("Failed to parse job id value %s", v); - - } else if (streq(l, "job-type")) { - JobType t; - - t = job_type_from_string(v); - if (t < 0) - log_debug("Failed to parse job type %s", v); - else if (t >= _JOB_TYPE_MAX_IN_TRANSACTION) - log_debug("Cannot deserialize job of type %s", v); - else - j->type = t; - - } else if (streq(l, "job-state")) { - JobState s; - - s = job_state_from_string(v); - if (s < 0) - log_debug("Failed to parse job state %s", v); - else - job_set_state(j, s); - - } else if (streq(l, "job-irreversible")) { - int b; - - b = parse_boolean(v); - if (b < 0) - log_debug("Failed to parse job irreversible flag %s", v); - else - j->irreversible = j->irreversible || b; - - } else if (streq(l, "job-sent-dbus-new-signal")) { - int b; - - b = parse_boolean(v); - if (b < 0) - log_debug("Failed to parse job sent_dbus_new_signal flag %s", v); - else - j->sent_dbus_new_signal = j->sent_dbus_new_signal || b; - - } else if (streq(l, "job-ignore-order")) { - int b; - - b = parse_boolean(v); - if (b < 0) - log_debug("Failed to parse job ignore_order flag %s", v); - else - j->ignore_order = j->ignore_order || b; - - } else if (streq(l, "job-begin")) { - unsigned long long ull; - - if (sscanf(v, "%llu", &ull) != 1) - log_debug("Failed to parse job-begin value %s", v); - else - j->begin_usec = ull; - - } else if (streq(l, "subscribed")) { - - if (strv_extend(&j->deserialized_clients, v) < 0) - log_oom(); - } - } -} - -int job_coldplug(Job *j) { - int r; - - assert(j); - - /* After deserialization is complete and the bus connection - * set up again, let's start watching our subscribers again */ - (void) bus_track_coldplug(j->manager, &j->clients, false, j->deserialized_clients); - j->deserialized_clients = strv_free(j->deserialized_clients); - - if (j->state == JOB_WAITING) - job_add_to_run_queue(j); - - if (j->begin_usec == 0 || j->unit->job_timeout == USEC_INFINITY) - return 0; - - j->timer_event_source = sd_event_source_unref(j->timer_event_source); - - r = sd_event_add_time( - j->manager->event, - &j->timer_event_source, - CLOCK_MONOTONIC, - usec_add(j->begin_usec, j->unit->job_timeout), 0, - job_dispatch_timer, j); - if (r < 0) - log_debug_errno(r, "Failed to restart timeout for job: %m"); - - (void) sd_event_source_set_description(j->timer_event_source, "job-timeout"); - - return r; -} - -void job_shutdown_magic(Job *j) { - assert(j); - - /* The shutdown target gets some special treatment here: we - * tell the kernel to begin with flushing its disk caches, to - * optimize shutdown time a bit. Ideally we wouldn't hardcode - * this magic into PID 1. However all other processes aren't - * options either since they'd exit much sooner than PID 1 and - * asynchronous sync() would cause their exit to be - * delayed. */ - - if (j->type != JOB_START) - return; - - if (!MANAGER_IS_SYSTEM(j->unit->manager)) - return; - - if (!unit_has_name(j->unit, SPECIAL_SHUTDOWN_TARGET)) - return; - - /* In case messages on console has been disabled on boot */ - j->unit->manager->no_console_output = false; - - if (detect_container() > 0) - return; - - asynchronous_sync(); -} - -int job_get_timeout(Job *j, usec_t *timeout) { - usec_t x = USEC_INFINITY, y = USEC_INFINITY; - Unit *u = j->unit; - int r; - - assert(u); - - if (j->timer_event_source) { - r = sd_event_source_get_time(j->timer_event_source, &x); - if (r < 0) - return r; - } - - if (UNIT_VTABLE(u)->get_timeout) { - r = UNIT_VTABLE(u)->get_timeout(u, &y); - if (r < 0) - return r; - } - - if (x == USEC_INFINITY && y == USEC_INFINITY) - return 0; - - *timeout = MIN(x, y); - return 1; -} - -static const char* const job_state_table[_JOB_STATE_MAX] = { - [JOB_WAITING] = "waiting", - [JOB_RUNNING] = "running" -}; - -DEFINE_STRING_TABLE_LOOKUP(job_state, JobState); - -static const char* const job_type_table[_JOB_TYPE_MAX] = { - [JOB_START] = "start", - [JOB_VERIFY_ACTIVE] = "verify-active", - [JOB_STOP] = "stop", - [JOB_RELOAD] = "reload", - [JOB_RELOAD_OR_START] = "reload-or-start", - [JOB_RESTART] = "restart", - [JOB_TRY_RESTART] = "try-restart", - [JOB_TRY_RELOAD] = "try-reload", - [JOB_NOP] = "nop", -}; - -DEFINE_STRING_TABLE_LOOKUP(job_type, JobType); - -static const char* const job_mode_table[_JOB_MODE_MAX] = { - [JOB_FAIL] = "fail", - [JOB_REPLACE] = "replace", - [JOB_REPLACE_IRREVERSIBLY] = "replace-irreversibly", - [JOB_ISOLATE] = "isolate", - [JOB_FLUSH] = "flush", - [JOB_IGNORE_DEPENDENCIES] = "ignore-dependencies", - [JOB_IGNORE_REQUIREMENTS] = "ignore-requirements", -}; - -DEFINE_STRING_TABLE_LOOKUP(job_mode, JobMode); - -static const char* const job_result_table[_JOB_RESULT_MAX] = { - [JOB_DONE] = "done", - [JOB_CANCELED] = "canceled", - [JOB_TIMEOUT] = "timeout", - [JOB_FAILED] = "failed", - [JOB_DEPENDENCY] = "dependency", - [JOB_SKIPPED] = "skipped", - [JOB_INVALID] = "invalid", - [JOB_ASSERT] = "assert", - [JOB_UNSUPPORTED] = "unsupported", -}; - -DEFINE_STRING_TABLE_LOOKUP(job_result, JobResult); - -const char* job_type_to_access_method(JobType t) { - assert(t >= 0); - assert(t < _JOB_TYPE_MAX); - - if (IN_SET(t, JOB_START, JOB_RESTART, JOB_TRY_RESTART)) - return "start"; - else if (t == JOB_STOP) - return "stop"; - else - return "reload"; -} |