| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| 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 <assert.h> |
| #include <errno.h> |
| #include <sys/timerfd.h> |
| #include <sys/epoll.h> |
| |
| #include "systemd/sd-id128.h" |
| #include "systemd/sd-messages.h" |
| #include "set.h" |
| #include "unit.h" |
| #include "macro.h" |
| #include "strv.h" |
| #include "load-fragment.h" |
| #include "load-dropin.h" |
| #include "log.h" |
| #include "dbus-job.h" |
| #include "special.h" |
| #include "sync.h" |
| #include "virt.h" |
| |
| JobBusClient* job_bus_client_new(DBusConnection *connection, const char *name) { |
| JobBusClient *cl; |
| size_t name_len; |
| |
| name_len = strlen(name); |
| cl = malloc0(sizeof(JobBusClient) + name_len + 1); |
| if (!cl) |
| return NULL; |
| |
| cl->bus = connection; |
| memcpy(cl->name, name, name_len + 1); |
| return cl; |
| } |
| |
| 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; |
| j->timer_watch.type = WATCH_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) { |
| JobBusClient *cl; |
| |
| 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(Job, run_queue, j->manager->run_queue, j); |
| |
| if (j->in_dbus_queue) |
| LIST_REMOVE(Job, dbus_queue, j->manager->dbus_job_queue, j); |
| |
| if (j->timer_watch.type != WATCH_INVALID) { |
| assert(j->timer_watch.type == WATCH_JOB_TIMER); |
| assert(j->timer_watch.data.job == j); |
| assert(j->timer_watch.fd >= 0); |
| |
| assert_se(epoll_ctl(j->manager->epoll_fd, EPOLL_CTL_DEL, j->timer_watch.fd, NULL) >= 0); |
| close_nointr_nofail(j->timer_watch.fd); |
| } |
| |
| while ((cl = j->bus_client_list)) { |
| LIST_REMOVE(JobBusClient, client, j->bus_client_list, cl); |
| free(cl); |
| } |
| free(j); |
| } |
| |
| void job_uninstall(Job *j) { |
| Job **pj; |
| |
| assert(j->installed); |
| |
| 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 (j->manager->n_reloading <= 0) |
| 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->override = j->override || other->override; |
| 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); |
| |
| pj = (j->type == JOB_NOP) ? &j->unit->nop_job : &j->unit->job; |
| uj = *pj; |
| |
| if (uj) { |
| if (j->type != JOB_NOP && job_type_is_conflicting(uj->type, j->type)) |
| job_finish_and_invalidate(uj, JOB_CANCELED, false); |
| else { |
| /* not conflicting, i.e. mergeable */ |
| |
| if (j->type == JOB_NOP || 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_debug_unit(uj->unit->id, |
| "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_debug_unit(uj->unit->id, |
| "Merged into running job, re-running: %s/%s as %u", |
| uj->unit->id, job_type_to_string(uj->type), (unsigned) uj->id); |
| uj->state = JOB_WAITING; |
| uj->manager->n_running_jobs--; |
| return uj; |
| } |
| } |
| } |
| |
| /* Install the job */ |
| *pj = j; |
| j->installed = true; |
| j->manager->n_installed_jobs ++; |
| log_debug_unit(j->unit->id, |
| "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_debug_unit(j->unit->id, |
| "Unit %s already has a job installed. Not installing deserialized job.", |
| j->unit->id); |
| return -EEXIST; |
| } |
| *pj = j; |
| j->installed = true; |
| log_debug_unit(j->unit->id, |
| "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(JobDependency, subject, subject->subject_list, l); |
| |
| LIST_PREPEND(JobDependency, object, object->object_list, l); |
| |
| return l; |
| } |
| |
| void job_dependency_free(JobDependency *l) { |
| assert(l); |
| |
| if (l->subject) |
| LIST_REMOVE(JobDependency, subject, l->subject->subject_list, l); |
| |
| LIST_REMOVE(JobDependency, 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\tForced: %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->override), |
| 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 merged with C is the same as |
| * A merged with C merged with B. |
| * |
| * 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; |
| |
| default: |
| assert_not_reached("Invalid job type"); |
| } |
| } |
| |
| void 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)) |
| *t = JOB_NOP; |
| else |
| *t = JOB_RESTART; |
| break; |
| |
| case JOB_RELOAD_OR_START: |
| s = unit_active_state(u); |
| if (UNIT_IS_INACTIVE_OR_DEACTIVATING(s)) |
| *t = JOB_START; |
| else |
| *t = JOB_RELOAD; |
| break; |
| |
| default: |
| ; |
| } |
| } |
| |
| int job_type_merge_and_collapse(JobType *a, JobType b, Unit *u) { |
| JobType t = job_type_lookup_merge(*a, b); |
| if (t < 0) |
| return -EEXIST; |
| *a = t; |
| job_type_collapse(a, u); |
| return 0; |
| } |
| |
| 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. */ |
| |
| /* 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 lets 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 lets 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) { |
| log_debug_unit(j->unit->id, |
| "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; |
| } |
| |
| int job_run_and_invalidate(Job *j) { |
| int r; |
| uint32_t id; |
| Manager *m = j->manager; |
| |
| assert(j); |
| assert(j->installed); |
| assert(j->type < _JOB_TYPE_MAX_IN_TRANSACTION); |
| assert(j->in_run_queue); |
| |
| LIST_REMOVE(Job, 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; |
| |
| j->state = JOB_RUNNING; |
| m->n_running_jobs++; |
| job_add_to_dbus_queue(j); |
| |
| /* While we execute this operation the job might go away (for |
| * example: because it 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. */ |
| id = j->id; |
| |
| switch (j->type) { |
| |
| case JOB_START: |
| r = unit_start(j->unit); |
| |
| /* If this unit cannot be started, then simply wait */ |
| if (r == -EBADR) |
| r = 0; |
| break; |
| |
| 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_STOP: |
| case JOB_RESTART: |
| r = unit_stop(j->unit); |
| |
| /* If this unit cannot stopped, then simply wait. */ |
| if (r == -EBADR) |
| r = 0; |
| break; |
| |
| case JOB_RELOAD: |
| r = unit_reload(j->unit); |
| break; |
| |
| case JOB_NOP: |
| r = -EALREADY; |
| break; |
| |
| default: |
| assert_not_reached("Unknown job type"); |
| } |
| |
| j = manager_get_job(m, id); |
| if (j) { |
| if (r == -EALREADY) |
| r = job_finish_and_invalidate(j, JOB_DONE, true); |
| else if (r == -EBADR) |
| r = job_finish_and_invalidate(j, JOB_SKIPPED, true); |
| else if (r == -ENOEXEC) |
| r = job_finish_and_invalidate(j, JOB_INVALID, true); |
| else if (r == -EAGAIN) { |
| j->state = JOB_WAITING; |
| m->n_running_jobs--; |
| } else if (r < 0) |
| r = job_finish_and_invalidate(j, JOB_FAILED, true); |
| } |
| |
| return r; |
| } |
| |
| _pure_ static const char *job_get_status_message_format(Unit *u, JobType t, JobResult result) { |
| const UnitStatusMessageFormats *format_table; |
| |
| assert(u); |
| assert(t >= 0); |
| assert(t < _JOB_TYPE_MAX); |
| |
| format_table = &UNIT_VTABLE(u)->status_message_formats; |
| if (!format_table) |
| return NULL; |
| |
| if (t == JOB_START) |
| return format_table->finished_start_job[result]; |
| else if (t == JOB_STOP || t == JOB_RESTART) |
| return format_table->finished_stop_job[result]; |
| |
| return NULL; |
| } |
| |
| _pure_ static const char *job_get_status_message_format_try_harder(Unit *u, JobType t, JobResult result) { |
| const char *format; |
| |
| assert(u); |
| assert(t >= 0); |
| assert(t < _JOB_TYPE_MAX); |
| |
| format = job_get_status_message_format(u, t, result); |
| if (format) |
| return format; |
| |
| /* Return generic strings */ |
| if (t == JOB_START) { |
| if (result == JOB_DONE) |
| return "Started %s."; |
| else if (result == JOB_FAILED) |
| return "Failed to start %s."; |
| else if (result == JOB_DEPENDENCY) |
| return "Dependency failed for %s."; |
| else if (result == JOB_TIMEOUT) |
| return "Timed out starting %s."; |
| } else if (t == JOB_STOP || t == JOB_RESTART) { |
| if (result == JOB_DONE) |
| return "Stopped %s."; |
| else if (result == JOB_FAILED) |
| return "Stopped (with error) %s."; |
| else if (result == JOB_TIMEOUT) |
| return "Timed out stoppping %s."; |
| } else if (t == JOB_RELOAD) { |
| if (result == JOB_DONE) |
| return "Reloaded %s."; |
| else if (result == JOB_FAILED) |
| return "Reload failed for %s."; |
| else if (result == JOB_TIMEOUT) |
| return "Timed out reloading %s."; |
| } |
| |
| return NULL; |
| } |
| |
| static void job_print_status_message(Unit *u, JobType t, JobResult result) { |
| const char *format; |
| |
| assert(u); |
| assert(t >= 0); |
| assert(t < _JOB_TYPE_MAX); |
| |
| if (t == JOB_START) { |
| format = job_get_status_message_format(u, t, result); |
| if (!format) |
| return; |
| |
| switch (result) { |
| |
| case JOB_DONE: |
| if (u->condition_result) |
| unit_status_printf(u, ANSI_GREEN_ON " OK " ANSI_HIGHLIGHT_OFF, format); |
| break; |
| |
| case JOB_FAILED: |
| unit_status_printf(u, ANSI_HIGHLIGHT_RED_ON "FAILED" ANSI_HIGHLIGHT_OFF, format); |
| manager_status_printf(u->manager, false, NULL, "See 'systemctl status %s' for details.", u->id); |
| break; |
| |
| case JOB_DEPENDENCY: |
| unit_status_printf(u, ANSI_HIGHLIGHT_YELLOW_ON "DEPEND" ANSI_HIGHLIGHT_OFF, format); |
| break; |
| |
| case JOB_TIMEOUT: |
| unit_status_printf(u, ANSI_HIGHLIGHT_RED_ON " TIME " ANSI_HIGHLIGHT_OFF, format); |
| break; |
| |
| default: |
| ; |
| } |
| |
| } else if (t == JOB_STOP || t == JOB_RESTART) { |
| |
| format = job_get_status_message_format(u, t, result); |
| if (!format) |
| return; |
| |
| switch (result) { |
| |
| case JOB_TIMEOUT: |
| unit_status_printf(u, ANSI_HIGHLIGHT_RED_ON " TIME " ANSI_HIGHLIGHT_OFF, format); |
| break; |
| |
| case JOB_DONE: |
| case JOB_FAILED: |
| unit_status_printf(u, ANSI_GREEN_ON " OK " ANSI_HIGHLIGHT_OFF, format); |
| break; |
| |
| default: |
| ; |
| } |
| |
| } else if (t == JOB_VERIFY_ACTIVE) { |
| |
| /* 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. */ |
| if (result == JOB_SKIPPED) |
| unit_status_printf(u, ANSI_HIGHLIGHT_ON " INFO " ANSI_HIGHLIGHT_OFF, "%s is not active."); |
| } |
| } |
| |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wformat-nonliteral" |
| static void job_log_status_message(Unit *u, JobType t, JobResult result) { |
| const char *format; |
| char buf[LINE_MAX]; |
| |
| 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_try_harder(u, t, result); |
| if (!format) |
| return; |
| |
| snprintf(buf, sizeof(buf), format, unit_description(u)); |
| char_array_0(buf); |
| |
| if (t == JOB_START) { |
| sd_id128_t mid; |
| |
| mid = result == JOB_DONE ? SD_MESSAGE_UNIT_STARTED : SD_MESSAGE_UNIT_FAILED; |
| log_struct_unit(result == JOB_DONE ? LOG_INFO : LOG_ERR, |
| u->id, |
| MESSAGE_ID(mid), |
| "RESULT=%s", job_result_to_string(result), |
| "MESSAGE=%s", buf, |
| NULL); |
| |
| } else if (t == JOB_STOP) |
| log_struct_unit(result == JOB_DONE ? LOG_INFO : LOG_ERR, |
| u->id, |
| MESSAGE_ID(SD_MESSAGE_UNIT_STOPPED), |
| "RESULT=%s", job_result_to_string(result), |
| "MESSAGE=%s", buf, |
| NULL); |
| |
| else if (t == JOB_RELOAD) |
| log_struct_unit(result == JOB_DONE ? LOG_INFO : LOG_ERR, |
| u->id, |
| MESSAGE_ID(SD_MESSAGE_UNIT_RELOADED), |
| "RESULT=%s", job_result_to_string(result), |
| "MESSAGE=%s", buf, |
| NULL); |
| } |
| #pragma GCC diagnostic pop |
| |
| int job_finish_and_invalidate(Job *j, JobResult result, bool recursive) { |
| 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; |
| |
| if (j->state == JOB_RUNNING) |
| j->manager->n_running_jobs--; |
| |
| log_debug_unit(u->id, "Job %s/%s finished, result=%s", |
| u->id, job_type_to_string(t), job_result_to_string(result)); |
| |
| job_print_status_message(u, t, result); |
| job_log_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); |
| j->state = 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 (t == JOB_START || |
| t == JOB_VERIFY_ACTIVE) { |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
| if (other->job && |
| (other->job->type == JOB_START || |
| other->job->type == JOB_VERIFY_ACTIVE)) |
| job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
| if (other->job && |
| (other->job->type == JOB_START || |
| other->job->type == JOB_VERIFY_ACTIVE)) |
| job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
| if (other->job && |
| !other->job->override && |
| (other->job->type == JOB_START || |
| other->job->type == JOB_VERIFY_ACTIVE)) |
| job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true); |
| |
| } else if (t == JOB_STOP) { |
| |
| SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
| if (other->job && |
| (other->job->type == JOB_START || |
| other->job->type == JOB_VERIFY_ACTIVE)) |
| job_finish_and_invalidate(other->job, JOB_DEPENDENCY, true); |
| } |
| } |
| |
| /* 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_unit(LOG_NOTICE, |
| u->id, |
| "JOB_TYPE=%s", job_type_to_string(t), |
| "JOB_RESULT=%s", job_result_to_string(result), |
| "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; |
| } |
| |
| int job_start_timer(Job *j) { |
| struct itimerspec its = {}; |
| struct epoll_event ev = { |
| .data.ptr = &j->timer_watch, |
| .events = EPOLLIN, |
| }; |
| int fd, r; |
| |
| if (j->unit->job_timeout <= 0 || |
| j->timer_watch.type == WATCH_JOB_TIMER) |
| return 0; |
| |
| assert(j->timer_watch.type == WATCH_INVALID); |
| |
| if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| timespec_store(&its.it_value, j->unit->job_timeout); |
| |
| if (timerfd_settime(fd, 0, &its, NULL) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| if (epoll_ctl(j->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| j->timer_watch.type = WATCH_JOB_TIMER; |
| j->timer_watch.fd = fd; |
| j->timer_watch.data.job = j; |
| |
| return 0; |
| |
| fail: |
| if (fd >= 0) |
| close_nointr_nofail(fd); |
| |
| return r; |
| } |
| |
| void job_add_to_run_queue(Job *j) { |
| assert(j); |
| assert(j->installed); |
| |
| if (j->in_run_queue) |
| return; |
| |
| LIST_PREPEND(Job, 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(Job, 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/%lu", (unsigned long) j->id) < 0) |
| return NULL; |
| |
| return p; |
| } |
| |
| void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w) { |
| assert(j); |
| assert(w == &j->timer_watch); |
| |
| log_warning_unit(j->unit->id, "Job %s/%s timed out.", |
| j->unit->id, job_type_to_string(j->type)); |
| job_finish_and_invalidate(j, JOB_TIMEOUT, true); |
| } |
| |
| int job_serialize(Job *j, FILE *f, FDSet *fds) { |
| 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-override=%s\n", yes_no(j->override)); |
| 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)); |
| /* Cannot save bus clients. Just note the fact that we're losing |
| * them. job_send_message() will fallback to broadcasting. */ |
| fprintf(f, "job-forgot-bus-clients=%s\n", |
| yes_no(j->forgot_bus_clients || j->bus_client_list)); |
| if (j->timer_watch.type == WATCH_JOB_TIMER) { |
| int copy = fdset_put_dup(fds, j->timer_watch.fd); |
| if (copy < 0) |
| return copy; |
| fprintf(f, "job-timer-watch-fd=%d\n", copy); |
| } |
| |
| /* End marker */ |
| fputc('\n', f); |
| return 0; |
| } |
| |
| int job_deserialize(Job *j, FILE *f, FDSet *fds) { |
| 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 = 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 = job_state_from_string(v); |
| if (s < 0) |
| log_debug("Failed to parse job state %s", v); |
| else |
| j->state = s; |
| } else if (streq(l, "job-override")) { |
| int b = parse_boolean(v); |
| if (b < 0) |
| log_debug("Failed to parse job override flag %s", v); |
| else |
| j->override = j->override || b; |
| } else if (streq(l, "job-irreversible")) { |
| int 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 = 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 = 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-forgot-bus-clients")) { |
| int b = parse_boolean(v); |
| if (b < 0) |
| log_debug("Failed to parse job forgot_bus_clients flag %s", v); |
| else |
| j->forgot_bus_clients = j->forgot_bus_clients || b; |
| } else if (streq(l, "job-timer-watch-fd")) { |
| int fd; |
| if (safe_atoi(v, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) |
| log_debug("Failed to parse job-timer-watch-fd value %s", v); |
| else { |
| if (j->timer_watch.type == WATCH_JOB_TIMER) |
| close_nointr_nofail(j->timer_watch.fd); |
| |
| j->timer_watch.type = WATCH_JOB_TIMER; |
| j->timer_watch.fd = fdset_remove(fds, fd); |
| j->timer_watch.data.job = j; |
| } |
| } |
| } |
| } |
| |
| int job_coldplug(Job *j) { |
| struct epoll_event ev = { |
| .data.ptr = &j->timer_watch, |
| .events = EPOLLIN, |
| }; |
| |
| if (j->timer_watch.type != WATCH_JOB_TIMER) |
| return 0; |
| |
| if (epoll_ctl(j->manager->epoll_fd, EPOLL_CTL_ADD, j->timer_watch.fd, &ev) < 0) |
| return -errno; |
| |
| return 0; |
| } |
| |
| 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 (!unit_has_name(j->unit, SPECIAL_SHUTDOWN_TARGET)) |
| return; |
| |
| if (j->type != JOB_START) |
| return; |
| |
| if (detect_container(NULL) > 0) |
| return; |
| |
| asynchronous_sync(); |
| } |
| |
| 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_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_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", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(job_result, JobResult); |