#include <systemd/sd-daemon.h>
#include "manager.h"
+#include "transaction.h"
#include "hashmap.h"
#include "macro.h"
#include "strv.h"
#include "exit-status.h"
#include "virt.h"
#include "watchdog.h"
+#include "cgroup-util.h"
/* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
#define GC_QUEUE_ENTRIES_MAX 16
assert(m);
- /* Enable that we get SIGINT on control-alt-del */
- if (reboot(RB_DISABLE_CAD) < 0)
+ /* Enable that we get SIGINT on control-alt-del. In containers
+ * this will fail with EPERM, so ignore that. */
+ if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM)
log_warning("Failed to enable ctrl-alt-del handling: %m");
- if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
- log_warning("Failed to open /dev/tty0: %m");
- else {
+ fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0) {
+ /* Support systems without virtual console */
+ if (fd != -ENOENT)
+ log_warning("Failed to open /dev/tty0: %m");
+ } else {
/* Enable that we get SIGWINCH on kbrequest */
if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
m->name_data_slot = m->conn_data_slot = m->subscribed_data_slot = -1;
m->exit_code = _MANAGER_EXIT_CODE_INVALID;
m->pin_cgroupfs_fd = -1;
+ m->idle_pipe[0] = m->idle_pipe[1] = -1;
#ifdef HAVE_AUDIT
m->audit_fd = -1;
if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
goto fail;
- if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
- goto fail;
-
if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
goto fail;
}
static void manager_clear_jobs_and_units(Manager *m) {
- Job *j;
Unit *u;
assert(m);
- while ((j = hashmap_first(m->transaction_jobs)))
- job_free(j);
-
while ((u = hashmap_first(m->units)))
unit_free(u);
assert(!m->cleanup_queue);
assert(!m->gc_queue);
- assert(hashmap_isempty(m->transaction_jobs));
assert(hashmap_isempty(m->jobs));
assert(hashmap_isempty(m->units));
}
hashmap_free(m->units);
hashmap_free(m->jobs);
- hashmap_free(m->transaction_jobs);
hashmap_free(m->watch_pids);
hashmap_free(m->watch_bus);
hashmap_free(m->cgroup_bondings);
set_free_free(m->unit_path_cache);
+ close_pipe(m->idle_pipe);
+
free(m);
}
return r;
}
-static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {
- assert(m);
- assert(j);
-
- /* Deletes one job from the transaction */
-
- manager_transaction_unlink_job(m, j, delete_dependencies);
-
- if (!j->installed)
- job_free(j);
-}
-
-static void transaction_delete_unit(Manager *m, Unit *u) {
- Job *j;
-
- /* Deletes all jobs associated with a certain unit from the
- * transaction */
-
- while ((j = hashmap_get(m->transaction_jobs, u)))
- transaction_delete_job(m, j, true);
-}
-
-static void transaction_clean_dependencies(Manager *m) {
- Iterator i;
- Job *j;
-
- assert(m);
-
- /* Drops all dependencies of all installed jobs */
-
- HASHMAP_FOREACH(j, m->jobs, i) {
- while (j->subject_list)
- job_dependency_free(j->subject_list);
- while (j->object_list)
- job_dependency_free(j->object_list);
- }
-
- assert(!m->transaction_anchor);
-}
-
-static void transaction_abort(Manager *m) {
- Job *j;
-
- assert(m);
-
- while ((j = hashmap_first(m->transaction_jobs)))
- if (j->installed)
- transaction_delete_job(m, j, true);
- else
- job_free(j);
-
- assert(hashmap_isempty(m->transaction_jobs));
-
- transaction_clean_dependencies(m);
-}
-
-static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {
- JobDependency *l;
-
- assert(m);
-
- /* A recursive sweep through the graph that marks all units
- * that matter to the anchor job, i.e. are directly or
- * indirectly a dependency of the anchor job via paths that
- * are fully marked as mattering. */
-
- if (j)
- l = j->subject_list;
- else
- l = m->transaction_anchor;
-
- LIST_FOREACH(subject, l, l) {
-
- /* This link does not matter */
- if (!l->matters)
- continue;
-
- /* This unit has already been marked */
- if (l->object->generation == generation)
- continue;
-
- l->object->matters_to_anchor = true;
- l->object->generation = generation;
-
- transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);
- }
-}
-
-static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {
- JobDependency *l, *last;
-
- assert(j);
- assert(other);
- assert(j->unit == other->unit);
- assert(!j->installed);
-
- /* Merges 'other' into 'j' and then deletes j. */
-
- j->type = t;
- j->state = JOB_WAITING;
- j->override = j->override || other->override;
-
- j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;
-
- /* Patch us in as new owner of the JobDependency objects */
- last = NULL;
- LIST_FOREACH(subject, l, other->subject_list) {
- assert(l->subject == other);
- l->subject = j;
- last = l;
- }
-
- /* Merge both lists */
- if (last) {
- last->subject_next = j->subject_list;
- if (j->subject_list)
- j->subject_list->subject_prev = last;
- j->subject_list = other->subject_list;
- }
-
- /* Patch us in as new owner of the JobDependency objects */
- last = NULL;
- LIST_FOREACH(object, l, other->object_list) {
- assert(l->object == other);
- l->object = j;
- last = l;
- }
-
- /* Merge both lists */
- if (last) {
- last->object_next = j->object_list;
- if (j->object_list)
- j->object_list->object_prev = last;
- j->object_list = other->object_list;
- }
-
- /* Kill the other job */
- other->subject_list = NULL;
- other->object_list = NULL;
- transaction_delete_job(m, other, true);
-}
-static bool job_is_conflicted_by(Job *j) {
- JobDependency *l;
-
- assert(j);
-
- /* Returns true if this job is pulled in by a least one
- * ConflictedBy dependency. */
-
- LIST_FOREACH(object, l, j->object_list)
- if (l->conflicts)
- return true;
-
- return false;
-}
-
-static int delete_one_unmergeable_job(Manager *m, Job *j) {
- Job *k;
-
- assert(j);
-
- /* Tries to delete one item in the linked list
- * j->transaction_next->transaction_next->... that conflicts
- * with another one, in an attempt to make an inconsistent
- * transaction work. */
-
- /* We rely here on the fact that if a merged with b does not
- * merge with c, either a or b merge with c neither */
- LIST_FOREACH(transaction, j, j)
- LIST_FOREACH(transaction, k, j->transaction_next) {
- Job *d;
-
- /* Is this one mergeable? Then skip it */
- if (job_type_is_mergeable(j->type, k->type))
- continue;
-
- /* Ok, we found two that conflict, let's see if we can
- * drop one of them */
- if (!j->matters_to_anchor && !k->matters_to_anchor) {
-
- /* Both jobs don't matter, so let's
- * find the one that is smarter to
- * remove. Let's think positive and
- * rather remove stops then starts --
- * except if something is being
- * stopped because it is conflicted by
- * another unit in which case we
- * rather remove the start. */
-
- log_debug("Looking at job %s/%s conflicted_by=%s", j->unit->id, job_type_to_string(j->type), yes_no(j->type == JOB_STOP && job_is_conflicted_by(j)));
- log_debug("Looking at job %s/%s conflicted_by=%s", k->unit->id, job_type_to_string(k->type), yes_no(k->type == JOB_STOP && job_is_conflicted_by(k)));
-
- if (j->type == JOB_STOP) {
-
- if (job_is_conflicted_by(j))
- d = k;
- else
- d = j;
-
- } else if (k->type == JOB_STOP) {
-
- if (job_is_conflicted_by(k))
- d = j;
- else
- d = k;
- } else
- d = j;
-
- } else if (!j->matters_to_anchor)
- d = j;
- else if (!k->matters_to_anchor)
- d = k;
- else
- return -ENOEXEC;
-
- /* Ok, we can drop one, so let's do so. */
- log_debug("Fixing conflicting jobs by deleting job %s/%s", d->unit->id, job_type_to_string(d->type));
- transaction_delete_job(m, d, true);
- return 0;
- }
-
- return -EINVAL;
-}
-
-static int transaction_merge_jobs(Manager *m, DBusError *e) {
- Job *j;
- Iterator i;
- int r;
-
- assert(m);
-
- /* First step, check whether any of the jobs for one specific
- * task conflict. If so, try to drop one of them. */
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- JobType t;
- Job *k;
-
- t = j->type;
- LIST_FOREACH(transaction, k, j->transaction_next) {
- if (job_type_merge(&t, k->type) >= 0)
- continue;
-
- /* OK, we could not merge all jobs for this
- * action. Let's see if we can get rid of one
- * of them */
-
- if ((r = delete_one_unmergeable_job(m, j)) >= 0)
- /* Ok, we managed to drop one, now
- * let's ask our callers to call us
- * again after garbage collecting */
- return -EAGAIN;
-
- /* We couldn't merge anything. Failure */
- dbus_set_error(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",
- job_type_to_string(t), job_type_to_string(k->type), k->unit->id);
- return r;
- }
- }
-
- /* Second step, merge the jobs. */
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- JobType t = j->type;
- Job *k;
-
- /* Merge all transactions */
- LIST_FOREACH(transaction, k, j->transaction_next)
- assert_se(job_type_merge(&t, k->type) == 0);
-
- /* If an active job is mergeable, merge it too */
- if (j->unit->job)
- job_type_merge(&t, j->unit->job->type); /* Might fail. Which is OK */
-
- while ((k = j->transaction_next)) {
- if (j->installed) {
- transaction_merge_and_delete_job(m, k, j, t);
- j = k;
- } else
- transaction_merge_and_delete_job(m, j, k, t);
- }
-
- if (j->unit->job && !j->installed)
- transaction_merge_and_delete_job(m, j, j->unit->job, t);
-
- assert(!j->transaction_next);
- assert(!j->transaction_prev);
- }
-
- return 0;
-}
-
-static void transaction_drop_redundant(Manager *m) {
- bool again;
-
- assert(m);
-
- /* Goes through the transaction and removes all jobs that are
- * a noop */
-
- do {
- Job *j;
- Iterator i;
-
- again = false;
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- bool changes_something = false;
- Job *k;
-
- LIST_FOREACH(transaction, k, j) {
-
- if (!job_is_anchor(k) &&
- (k->installed || job_type_is_redundant(k->type, unit_active_state(k->unit))) &&
- (!k->unit->job || !job_type_is_conflicting(k->type, k->unit->job->type)))
- continue;
-
- changes_something = true;
- break;
- }
-
- if (changes_something)
- continue;
-
- /* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */
- transaction_delete_job(m, j, false);
- again = true;
- break;
- }
-
- } while (again);
-}
-
-static bool unit_matters_to_anchor(Unit *u, Job *j) {
- assert(u);
- assert(!j->transaction_prev);
-
- /* Checks whether at least one of the jobs for this unit
- * matters to the anchor. */
-
- LIST_FOREACH(transaction, j, j)
- if (j->matters_to_anchor)
- return true;
-
- return false;
-}
-
-static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation, DBusError *e) {
- Iterator i;
- Unit *u;
- int r;
-
- assert(m);
- assert(j);
- assert(!j->transaction_prev);
-
- /* Does a recursive sweep through the ordering graph, looking
- * for a cycle. If we find cycle we try to break it. */
-
- /* Have we seen this before? */
- if (j->generation == generation) {
- Job *k, *delete;
-
- /* If the marker is NULL we have been here already and
- * decided the job was loop-free from here. Hence
- * shortcut things and return right-away. */
- if (!j->marker)
- return 0;
-
- /* So, the marker is not NULL and we already have been
- * here. We have a cycle. Let's try to break it. We go
- * backwards in our path and try to find a suitable
- * job to remove. We use the marker to find our way
- * back, since smart how we are we stored our way back
- * in there. */
- log_warning("Found ordering cycle on %s/%s", j->unit->id, job_type_to_string(j->type));
-
- delete = NULL;
- for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) {
-
- log_info("Walked on cycle path to %s/%s", k->unit->id, job_type_to_string(k->type));
-
- if (!delete &&
- !k->installed &&
- !unit_matters_to_anchor(k->unit, k)) {
- /* Ok, we can drop this one, so let's
- * do so. */
- delete = k;
- }
-
- /* Check if this in fact was the beginning of
- * the cycle */
- if (k == j)
- break;
- }
-
-
- if (delete) {
- log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->id, job_type_to_string(delete->type));
- transaction_delete_unit(m, delete->unit);
- return -EAGAIN;
- }
-
- log_error("Unable to break cycle");
-
- dbus_set_error(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, "Transaction order is cyclic. See system logs for details.");
- return -ENOEXEC;
- }
-
- /* Make the marker point to where we come from, so that we can
- * find our way backwards if we want to break a cycle. We use
- * a special marker for the beginning: we point to
- * ourselves. */
- j->marker = from ? from : j;
- j->generation = generation;
-
- /* We assume that the the dependencies are bidirectional, and
- * hence can ignore UNIT_AFTER */
- SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) {
- Job *o;
-
- /* Is there a job for this unit? */
- if (!(o = hashmap_get(m->transaction_jobs, u)))
-
- /* Ok, there is no job for this in the
- * transaction, but maybe there is already one
- * running? */
- if (!(o = u->job))
- continue;
-
- if ((r = transaction_verify_order_one(m, o, j, generation, e)) < 0)
- return r;
- }
-
- /* Ok, let's backtrack, and remember that this entry is not on
- * our path anymore. */
- j->marker = NULL;
-
- return 0;
-}
-
-static int transaction_verify_order(Manager *m, unsigned *generation, DBusError *e) {
- Job *j;
- int r;
- Iterator i;
- unsigned g;
-
- assert(m);
- assert(generation);
-
- /* Check if the ordering graph is cyclic. If it is, try to fix
- * that up by dropping one of the jobs. */
-
- g = (*generation)++;
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i)
- if ((r = transaction_verify_order_one(m, j, NULL, g, e)) < 0)
- return r;
-
- return 0;
-}
-
-static void transaction_collect_garbage(Manager *m) {
- bool again;
-
- assert(m);
-
- /* Drop jobs that are not required by any other job */
-
- do {
- Iterator i;
- Job *j;
-
- again = false;
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- if (j->object_list) {
- /* log_debug("Keeping job %s/%s because of %s/%s", */
- /* j->unit->id, job_type_to_string(j->type), */
- /* j->object_list->subject ? j->object_list->subject->unit->id : "root", */
- /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */
- continue;
- }
-
- /* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */
- transaction_delete_job(m, j, true);
- again = true;
- break;
- }
-
- } while (again);
-}
-
-static int transaction_is_destructive(Manager *m, DBusError *e) {
- Iterator i;
- Job *j;
-
- assert(m);
-
- /* Checks whether applying this transaction means that
- * existing jobs would be replaced */
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
-
- /* Assume merged */
- assert(!j->transaction_prev);
- assert(!j->transaction_next);
-
- if (j->unit->job &&
- j->unit->job != j &&
- !job_type_is_superset(j->type, j->unit->job->type)) {
-
- dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive.");
- return -EEXIST;
- }
- }
-
- return 0;
-}
-
-static void transaction_minimize_impact(Manager *m) {
- bool again;
- assert(m);
-
- /* Drops all unnecessary jobs that reverse already active jobs
- * or that stop a running service. */
-
- do {
- Job *j;
- Iterator i;
-
- again = false;
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- LIST_FOREACH(transaction, j, j) {
- bool stops_running_service, changes_existing_job;
-
- /* If it matters, we shouldn't drop it */
- if (j->matters_to_anchor)
- continue;
-
- /* Would this stop a running service?
- * Would this change an existing job?
- * If so, let's drop this entry */
-
- stops_running_service =
- j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));
-
- changes_existing_job =
- j->unit->job &&
- job_type_is_conflicting(j->type, j->unit->job->type);
-
- if (!stops_running_service && !changes_existing_job)
- continue;
-
- if (stops_running_service)
- log_debug("%s/%s would stop a running service.", j->unit->id, job_type_to_string(j->type));
-
- if (changes_existing_job)
- log_debug("%s/%s would change existing job.", j->unit->id, job_type_to_string(j->type));
-
- /* Ok, let's get rid of this */
- log_debug("Deleting %s/%s to minimize impact.", j->unit->id, job_type_to_string(j->type));
-
- transaction_delete_job(m, j, true);
- again = true;
- break;
- }
-
- if (again)
- break;
- }
-
- } while (again);
-}
-
-static int transaction_apply(Manager *m, JobMode mode) {
- Iterator i;
- Job *j;
- int r;
-
- /* Moves the transaction jobs to the set of active jobs */
-
- if (mode == JOB_ISOLATE) {
-
- /* When isolating first kill all installed jobs which
- * aren't part of the new transaction */
- rescan:
- HASHMAP_FOREACH(j, m->jobs, i) {
- assert(j->installed);
-
- if (hashmap_get(m->transaction_jobs, j->unit))
- continue;
-
- /* 'j' itself is safe to remove, but if other jobs
- are invalidated recursively, our iterator may become
- invalid and we need to start over. */
- if (job_finish_and_invalidate(j, JOB_CANCELED) > 0)
- goto rescan;
- }
- }
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- /* Assume merged */
- assert(!j->transaction_prev);
- assert(!j->transaction_next);
-
- if (j->installed)
- continue;
-
- if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)
- goto rollback;
- }
-
- while ((j = hashmap_steal_first(m->transaction_jobs))) {
- if (j->installed) {
- /* log_debug("Skipping already installed job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id); */
- continue;
- }
-
- if (j->unit->job)
- job_free(j->unit->job);
-
- j->unit->job = j;
- j->installed = true;
- m->n_installed_jobs ++;
-
- /* We're fully installed. Now let's free data we don't
- * need anymore. */
-
- assert(!j->transaction_next);
- assert(!j->transaction_prev);
-
- job_add_to_run_queue(j);
- job_add_to_dbus_queue(j);
- job_start_timer(j);
-
- log_debug("Installed new job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id);
- }
-
- /* As last step, kill all remaining job dependencies. */
- transaction_clean_dependencies(m);
-
- return 0;
-
-rollback:
-
- HASHMAP_FOREACH(j, m->transaction_jobs, i) {
- if (j->installed)
- continue;
-
- hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));
- }
-
- return r;
-}
-
-static int transaction_activate(Manager *m, JobMode mode, DBusError *e) {
- int r;
- unsigned generation = 1;
-
- assert(m);
-
- /* This applies the changes recorded in transaction_jobs to
- * the actual list of jobs, if possible. */
-
- /* First step: figure out which jobs matter */
- transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);
-
- /* Second step: Try not to stop any running services if
- * we don't have to. Don't try to reverse running
- * jobs if we don't have to. */
- if (mode == JOB_FAIL)
- transaction_minimize_impact(m);
-
- /* Third step: Drop redundant jobs */
- transaction_drop_redundant(m);
-
- for (;;) {
- /* Fourth step: Let's remove unneeded jobs that might
- * be lurking. */
- if (mode != JOB_ISOLATE)
- transaction_collect_garbage(m);
-
- /* Fifth step: verify order makes sense and correct
- * cycles if necessary and possible */
- if ((r = transaction_verify_order(m, &generation, e)) >= 0)
- break;
-
- if (r != -EAGAIN) {
- log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r));
- goto rollback;
- }
-
- /* Let's see if the resulting transaction ordering
- * graph is still cyclic... */
- }
-
- for (;;) {
- /* Sixth step: let's drop unmergeable entries if
- * necessary and possible, merge entries we can
- * merge */
- if ((r = transaction_merge_jobs(m, e)) >= 0)
- break;
-
- if (r != -EAGAIN) {
- log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r));
- goto rollback;
- }
-
- /* Seventh step: an entry got dropped, let's garbage
- * collect its dependencies. */
- if (mode != JOB_ISOLATE)
- transaction_collect_garbage(m);
-
- /* Let's see if the resulting transaction still has
- * unmergeable entries ... */
- }
-
- /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
- transaction_drop_redundant(m);
-
- /* Ninth step: check whether we can actually apply this */
- if (mode == JOB_FAIL)
- if ((r = transaction_is_destructive(m, e)) < 0) {
- log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r));
- goto rollback;
- }
-
- /* Tenth step: apply changes */
- if ((r = transaction_apply(m, mode)) < 0) {
- log_warning("Failed to apply transaction: %s", strerror(-r));
- goto rollback;
- }
-
- assert(hashmap_isempty(m->transaction_jobs));
- assert(!m->transaction_anchor);
-
- return 0;
-
-rollback:
- transaction_abort(m);
- return r;
-}
-
-static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {
- Job *j, *f;
-
- assert(m);
- assert(unit);
-
- /* Looks for an existing prospective job and returns that. If
- * it doesn't exist it is created and added to the prospective
- * jobs list. */
-
- f = hashmap_get(m->transaction_jobs, unit);
-
- LIST_FOREACH(transaction, j, f) {
- assert(j->unit == unit);
-
- if (j->type == type) {
- if (is_new)
- *is_new = false;
- return j;
- }
- }
-
- if (unit->job && unit->job->type == type)
- j = unit->job;
- else if (!(j = job_new(m, type, unit)))
- return NULL;
-
- j->generation = 0;
- j->marker = NULL;
- j->matters_to_anchor = false;
- j->override = override;
-
- LIST_PREPEND(Job, transaction, f, j);
-
- if (hashmap_replace(m->transaction_jobs, unit, f) < 0) {
- job_free(j);
- return NULL;
- }
-
- if (is_new)
- *is_new = true;
-
- /* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */
-
- return j;
-}
-
-void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {
- assert(m);
- assert(j);
-
- if (j->transaction_prev)
- j->transaction_prev->transaction_next = j->transaction_next;
- else if (j->transaction_next)
- hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);
- else
- hashmap_remove_value(m->transaction_jobs, j->unit, j);
-
- if (j->transaction_next)
- j->transaction_next->transaction_prev = j->transaction_prev;
-
- j->transaction_prev = j->transaction_next = NULL;
-
- while (j->subject_list)
- job_dependency_free(j->subject_list);
-
- while (j->object_list) {
- Job *other = j->object_list->matters ? j->object_list->subject : NULL;
-
- job_dependency_free(j->object_list);
-
- if (other && delete_dependencies) {
- log_debug("Deleting job %s/%s as dependency of job %s/%s",
- other->unit->id, job_type_to_string(other->type),
- j->unit->id, job_type_to_string(j->type));
- transaction_delete_job(m, other, delete_dependencies);
- }
- }
-}
-
-static int transaction_add_job_and_dependencies(
- Manager *m,
- JobType type,
- Unit *unit,
- Job *by,
- bool matters,
- bool override,
- bool conflicts,
- bool ignore_requirements,
- bool ignore_order,
- DBusError *e,
- Job **_ret) {
- Job *ret;
- Iterator i;
- Unit *dep;
- int r;
- bool is_new;
-
- assert(m);
- assert(type < _JOB_TYPE_MAX);
- assert(unit);
-
- /* log_debug("Pulling in %s/%s from %s/%s", */
- /* unit->id, job_type_to_string(type), */
- /* by ? by->unit->id : "NA", */
- /* by ? job_type_to_string(by->type) : "NA"); */
-
- if (unit->load_state != UNIT_LOADED &&
- unit->load_state != UNIT_ERROR &&
- unit->load_state != UNIT_MASKED) {
- dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id);
- return -EINVAL;
- }
-
- if (type != JOB_STOP && unit->load_state == UNIT_ERROR) {
- dbus_set_error(e, BUS_ERROR_LOAD_FAILED,
- "Unit %s failed to load: %s. "
- "See system logs and 'systemctl status %s' for details.",
- unit->id,
- strerror(-unit->load_error),
- unit->id);
- return -EINVAL;
- }
-
- if (type != JOB_STOP && unit->load_state == UNIT_MASKED) {
- dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->id);
- return -EINVAL;
- }
-
- if (!unit_job_is_applicable(unit, type)) {
- dbus_set_error(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, "Job type %s is not applicable for unit %s.", job_type_to_string(type), unit->id);
- return -EBADR;
- }
-
- /* First add the job. */
- if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))
- return -ENOMEM;
-
- ret->ignore_order = ret->ignore_order || ignore_order;
-
- /* Then, add a link to the job. */
- if (!job_dependency_new(by, ret, matters, conflicts))
- return -ENOMEM;
-
- if (is_new && !ignore_requirements) {
- Set *following;
-
- /* If we are following some other unit, make sure we
- * add all dependencies of everybody following. */
- if (unit_following_set(ret->unit, &following) > 0) {
- SET_FOREACH(dep, following, i)
- if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
- log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
-
- if (e)
- dbus_error_free(e);
- }
-
- set_free(following);
- }
-
- /* Finally, recursively add in all dependencies. */
- if (type == JOB_START || type == JOB_RELOAD_OR_START) {
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
- if (r != -EBADR)
- goto fail;
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_BIND_TO], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
-
- if (r != -EBADR)
- goto fail;
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
- log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, false, false, ignore_order, e, NULL)) < 0) {
- log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
-
- if (r != -EBADR)
- goto fail;
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
- log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTS], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e, NULL)) < 0) {
-
- if (r != -EBADR)
- goto fail;
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i)
- if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
- log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
-
- if (e)
- dbus_error_free(e);
- }
-
- }
-
- if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRED_BY], i)
- if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
-
- if (r != -EBADR)
- goto fail;
-
- if (e)
- dbus_error_free(e);
- }
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_BOUND_BY], i)
- if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
-
- if (r != -EBADR)
- goto fail;
-
- if (e)
- dbus_error_free(e);
- }
- }
-
- if (type == JOB_RELOAD || type == JOB_RELOAD_OR_START) {
-
- SET_FOREACH(dep, ret->unit->dependencies[UNIT_PROPAGATE_RELOAD_TO], i) {
- r = transaction_add_job_and_dependencies(m, JOB_RELOAD, dep, ret, false, override, false, false, ignore_order, e, NULL);
-
- if (r < 0) {
- log_warning("Cannot add dependency reload job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
-
- if (e)
- dbus_error_free(e);
- }
- }
- }
-
- /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
- }
-
- if (_ret)
- *_ret = ret;
-
- return 0;
-
-fail:
- return r;
-}
-
-static int transaction_add_isolate_jobs(Manager *m) {
- Iterator i;
- Unit *u;
- char *k;
- int r;
-
- assert(m);
-
- HASHMAP_FOREACH_KEY(u, k, m->units, i) {
-
- /* ignore aliases */
- if (u->id != k)
- continue;
-
- if (u->ignore_on_isolate)
- continue;
-
- /* No need to stop inactive jobs */
- if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job)
- continue;
-
- /* Is there already something listed for this? */
- if (hashmap_get(m->transaction_jobs, u))
- continue;
-
- if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, false, false, false, NULL, NULL)) < 0)
- log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->id, strerror(-r));
- }
-
- return 0;
-}
-
int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) {
int r;
- Job *ret;
+ Transaction *tr;
assert(m);
assert(type < _JOB_TYPE_MAX);
log_debug("Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode));
- if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, false,
- mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
- mode == JOB_IGNORE_DEPENDENCIES, e, &ret)) < 0) {
- transaction_abort(m);
- return r;
- }
+ tr = transaction_new();
+ if (!tr)
+ return -ENOMEM;
- if (mode == JOB_ISOLATE)
- if ((r = transaction_add_isolate_jobs(m)) < 0) {
- transaction_abort(m);
- return r;
- }
+ r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false,
+ mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
+ mode == JOB_IGNORE_DEPENDENCIES, e);
+ if (r < 0)
+ goto tr_abort;
- if ((r = transaction_activate(m, mode, e)) < 0)
- return r;
+ if (mode == JOB_ISOLATE) {
+ r = transaction_add_isolate_jobs(tr, m);
+ if (r < 0)
+ goto tr_abort;
+ }
+
+ r = transaction_activate(tr, m, mode, e);
+ if (r < 0)
+ goto tr_abort;
- log_debug("Enqueued job %s/%s as %u", unit->id, job_type_to_string(type), (unsigned) ret->id);
+ log_debug("Enqueued job %s/%s as %u", unit->id, job_type_to_string(type), (unsigned) tr->anchor_job->id);
if (_ret)
- *_ret = ret;
+ *_ret = tr->anchor_job;
+ transaction_free(tr);
return 0;
+
+tr_abort:
+ transaction_abort(tr);
+ transaction_free(tr);
+ return r;
}
int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) {
assert(m);
- transaction_abort(m);
-
while ((j = hashmap_first(m->jobs)))
- job_finish_and_invalidate(j, JOB_CANCELED);
+ /* No need to recurse. We're cancelling all jobs. */
+ job_finish_and_invalidate(j, JOB_CANCELED, false);
}
unsigned manager_dispatch_run_queue(Manager *m) {
int manager_loop(Manager *m) {
int r;
- int wait_msec = -1;
RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
if (r < 0)
return r;
- /* Sleep for half the watchdog time */
- if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM) {
- wait_msec = (int) (m->runtime_watchdog / 2 / USEC_PER_MSEC);
- if (wait_msec <= 0)
- wait_msec = 1;
- }
-
while (m->exit_code == MANAGER_RUNNING) {
struct epoll_event event;
int n;
+ int wait_msec = -1;
- if (wait_msec >= 0)
+ if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM)
watchdog_ping();
if (!ratelimit_test(&rl)) {
if (swap_dispatch_reload(m) > 0)
continue;
+ /* Sleep for half the watchdog time */
+ if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM) {
+ wait_msec = (int) (m->runtime_watchdog / 2 / USEC_PER_MSEC);
+ if (wait_msec <= 0)
+ wait_msec = 1;
+ } else
+ wait_msec = -1;
+
n = epoll_wait(m->epoll_fd, &event, 1, wait_msec);
if (n < 0) {
}
if (audit_log_user_comm_message(m->audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
- log_warning("Failed to send audit message: %m");
-
if (errno == EPERM) {
/* We aren't allowed to send audit messages?
- * Then let's not retry again, to avoid
- * spamming the user with the same and same
- * messages over and over. */
-
+ * Then let's not retry again. */
audit_close(m->audit_fd);
m->audit_fd = -1;
- }
+ } else
+ log_warning("Failed to send audit message: %m");
}
free(p);
void manager_check_finished(Manager *m) {
char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
- usec_t kernel_usec = 0, initrd_usec = 0, userspace_usec = 0, total_usec = 0;
+ usec_t kernel_usec, initrd_usec, userspace_usec, total_usec;
assert(m);
- if (dual_timestamp_is_set(&m->finish_timestamp))
+ if (hashmap_size(m->jobs) > 0)
return;
- if (hashmap_size(m->jobs) > 0)
+ /* Notify Type=idle units that we are done now */
+ close_pipe(m->idle_pipe);
+
+ if (dual_timestamp_is_set(&m->finish_timestamp))
return;
dual_timestamp_get(&m->finish_timestamp);
assert(m);
- if (!(l = strv_copy(controllers)))
+ l = strv_copy(controllers);
+ if (!l)
return -ENOMEM;
strv_free(m->default_controllers);
m->default_controllers = l;
+ cg_shorten_controllers(m->default_controllers);
+
return 0;
}
~ianmdlvl / elogind.git / blobdiff