X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Ftransaction.c;h=118a242e6e4bb4ccf8ace057509afebcffe89511;hp=a1cf70693428d9ad535d77a883692422a40afca1;hb=0a1beeb64207eaa88ab9236787b1cbc2f704ae14;hpb=7f2cddae09fd2579ae24434df577bb5e5a157d86 diff --git a/src/core/transaction.c b/src/core/transaction.c index a1cf70693..118a242e6 100644 --- a/src/core/transaction.c +++ b/src/core/transaction.c @@ -22,8 +22,10 @@ #include #include -#include "transaction.h" #include "bus-errors.h" +#include "bus-util.h" +#include "bus-error.h" +#include "transaction.h" static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies); @@ -97,6 +99,7 @@ static void transaction_merge_and_delete_job(Transaction *tr, Job *j, Job *other j->type = t; j->state = JOB_WAITING; j->override = j->override || other->override; + j->irreversible = j->irreversible || other->irreversible; j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor; @@ -138,7 +141,7 @@ static void transaction_merge_and_delete_job(Transaction *tr, Job *j, Job *other transaction_delete_job(tr, other, true); } -static bool job_is_conflicted_by(Job *j) { +_pure_ static bool job_is_conflicted_by(Job *j) { JobDependency *l; assert(j); @@ -186,8 +189,14 @@ static int delete_one_unmergeable_job(Transaction *tr, Job *j) { * 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))); + log_unit_debug(j->unit->id, + "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_unit_debug(k->unit->id, + "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) { @@ -213,7 +222,11 @@ static int delete_one_unmergeable_job(Transaction *tr, Job *j) { 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)); + log_unit_debug(d->unit->id, + "Fixing conflicting jobs %s/%s,%s/%s by deleting job %s/%s", + j->unit->id, job_type_to_string(j->type), + k->unit->id, job_type_to_string(k->type), + d->unit->id, job_type_to_string(d->type)); transaction_delete_job(tr, d, true); return 0; } @@ -221,7 +234,7 @@ static int delete_one_unmergeable_job(Transaction *tr, Job *j) { return -EINVAL; } -static int transaction_merge_jobs(Transaction *tr, DBusError *e) { +static int transaction_merge_jobs(Transaction *tr, sd_bus_error *e) { Job *j; Iterator i; int r; @@ -251,9 +264,12 @@ static int transaction_merge_jobs(Transaction *tr, DBusError *e) { 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; + return sd_bus_error_setf(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); } } @@ -310,7 +326,7 @@ rescan: } } -static bool unit_matters_to_anchor(Unit *u, Job *j) { +_pure_ static bool unit_matters_to_anchor(Unit *u, Job *j) { assert(u); assert(!j->transaction_prev); @@ -324,7 +340,7 @@ static bool unit_matters_to_anchor(Unit *u, Job *j) { return false; } -static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsigned generation, DBusError *e) { +static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsigned generation, sd_bus_error *e) { Iterator i; Unit *u; int r; @@ -334,7 +350,7 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi 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. */ + * for a cycle. If we find a cycle we try to break it. */ /* Have we seen this before? */ if (j->generation == generation) { @@ -352,14 +368,19 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi * 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)); + log_unit_warning(j->unit->id, + "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)); + /* logging for j not k here here to provide consistent narrative */ + log_unit_warning(j->unit->id, + "Found dependency on %s/%s", + k->unit->id, job_type_to_string(k->type)); - if (!delete && + if (!delete && hashmap_get(tr->jobs, k->unit) && !unit_matters_to_anchor(k->unit, k)) { /* Ok, we can drop this one, so let's * do so. */ @@ -374,15 +395,24 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi if (delete) { - log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->id, job_type_to_string(delete->type)); + /* logging for j not k here here to provide consistent narrative */ + log_unit_warning(j->unit->id, + "Breaking ordering cycle by deleting job %s/%s", + delete->unit->id, job_type_to_string(delete->type)); + log_unit_error(delete->unit->id, + "Job %s/%s deleted to break ordering cycle starting with %s/%s", + delete->unit->id, job_type_to_string(delete->type), + j->unit->id, job_type_to_string(j->type)); + unit_status_printf(delete->unit, ANSI_HIGHLIGHT_RED_ON " SKIP " ANSI_HIGHLIGHT_OFF, + "Ordering cycle found, skipping %s"); transaction_delete_unit(tr, 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; + return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, + "Transaction order is cyclic. See system logs for details."); } /* Make the marker point to where we come from, so that we can @@ -392,7 +422,7 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi j->marker = from ? from : j; j->generation = generation; - /* We assume that the the dependencies are bidirectional, and + /* We assume that the dependencies are bidirectional, and * hence can ignore UNIT_AFTER */ SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) { Job *o; @@ -420,7 +450,7 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi return 0; } -static int transaction_verify_order(Transaction *tr, unsigned *generation, DBusError *e) { +static int transaction_verify_order(Transaction *tr, unsigned *generation, sd_bus_error *e) { Job *j; int r; Iterator i; @@ -465,7 +495,7 @@ rescan: } } -static int transaction_is_destructive(Transaction *tr, DBusError *e) { +static int transaction_is_destructive(Transaction *tr, JobMode mode, sd_bus_error *e) { Iterator i; Job *j; @@ -480,12 +510,10 @@ static int transaction_is_destructive(Transaction *tr, DBusError *e) { assert(!j->transaction_prev); assert(!j->transaction_next); - if (j->unit->job && - !job_type_is_superset(j->type, j->unit->job->type)) { - - dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive."); - return -EEXIST; - } + if (j->unit->job && (mode == JOB_FAIL || j->unit->job->irreversible) && + job_type_is_conflicting(j->unit->job->type, j->type)) + return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, + "Transaction is destructive."); } return 0; @@ -524,13 +552,19 @@ rescan: continue; if (stops_running_service) - log_debug("%s/%s would stop a running service.", j->unit->id, job_type_to_string(j->type)); + log_unit_debug(j->unit->id, + "%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)); + log_unit_debug(j->unit->id, + "%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)); + log_unit_debug(j->unit->id, + "Deleting %s/%s to minimize impact.", + j->unit->id, job_type_to_string(j->type)); transaction_delete_job(tr, j, true); goto rescan; @@ -545,7 +579,7 @@ static int transaction_apply(Transaction *tr, Manager *m, JobMode mode) { /* Moves the transaction jobs to the set of active jobs */ - if (mode == JOB_ISOLATE) { + if (mode == JOB_ISOLATE || mode == JOB_FLUSH) { /* When isolating first kill all installed jobs which * aren't part of the new transaction */ @@ -591,6 +625,7 @@ static int transaction_apply(Transaction *tr, Manager *m, JobMode mode) { job_add_to_run_queue(j); job_add_to_dbus_queue(j); job_start_timer(j); + job_shutdown_magic(j); } return 0; @@ -603,7 +638,7 @@ rollback: return r; } -int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e) { +int transaction_activate(Transaction *tr, Manager *m, JobMode mode, sd_bus_error *e) { Iterator i; Job *j; int r; @@ -645,7 +680,7 @@ int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e break; if (r != -EAGAIN) { - log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r)); + log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error_message(e, r)); return r; } @@ -662,7 +697,7 @@ int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e break; if (r != -EAGAIN) { - log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r)); + log_warning("Requested transaction contains unmergeable jobs: %s", bus_error_message(e, r)); return r; } @@ -679,18 +714,16 @@ int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e transaction_drop_redundant(tr); /* Ninth step: check whether we can actually apply this */ - if (mode == JOB_FAIL) { - r = transaction_is_destructive(tr, e); - if (r < 0) { - log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r)); - return r; - } + r = transaction_is_destructive(tr, mode, e); + if (r < 0) { + log_notice("Requested transaction contradicts existing jobs: %s", bus_error_message(e, r)); + return r; } /* Tenth step: apply changes */ r = transaction_apply(tr, m, mode); if (r < 0) { - log_warning("Failed to apply transaction: %s", strerror(-r)); + log_warning_errno(-r, "Failed to apply transaction: %m"); return r; } @@ -703,8 +736,11 @@ int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e * feature for cosmetics, not actually useful for * anything beyond that. */ - if (m->idle_pipe[0] < 0 && m->idle_pipe[1] < 0) + if (m->idle_pipe[0] < 0 && m->idle_pipe[1] < 0 && + m->idle_pipe[2] < 0 && m->idle_pipe[3] < 0) { pipe2(m->idle_pipe, O_NONBLOCK|O_CLOEXEC); + pipe2(m->idle_pipe + 2, O_NONBLOCK|O_CLOEXEC); + } } return 0; @@ -740,11 +776,12 @@ static Job* transaction_add_one_job(Transaction *tr, JobType type, Unit *unit, b j->marker = NULL; j->matters_to_anchor = false; j->override = override; + j->irreversible = tr->irreversible; - LIST_PREPEND(Job, transaction, f, j); + LIST_PREPEND(transaction, f, j); if (hashmap_replace(tr->jobs, unit, f) < 0) { - LIST_REMOVE(Job, transaction, f, j); + LIST_REMOVE(transaction, f, j); job_free(j); return NULL; } @@ -782,9 +819,10 @@ static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependen 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)); + log_unit_debug(other->unit->id, + "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(tr, other, delete_dependencies); } } @@ -800,7 +838,7 @@ int transaction_add_job_and_dependencies( bool conflicts, bool ignore_requirements, bool ignore_order, - DBusError *e) { + sd_bus_error *e) { Job *ret; Iterator i; Unit *dep; @@ -817,32 +855,39 @@ int transaction_add_job_and_dependencies( /* 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 (!IN_SET(unit->load_state, UNIT_LOADED, UNIT_ERROR, UNIT_NOT_FOUND, UNIT_MASKED)) + return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, + "Unit %s is not loaded properly.", unit->id); 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 (unit->load_error == -ENOENT || unit->manager->test_run) + return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, + "Unit %s failed to load: %s.", + unit->id, + strerror(-unit->load_error)); + else + return sd_bus_error_setf(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); } - if (type != JOB_STOP && unit->load_state == UNIT_MASKED) { - dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->id); - return -EADDRNOTAVAIL; - } + if (type != JOB_STOP && unit->load_state == UNIT_NOT_FOUND) + return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, + "Unit %s failed to load: %s.", + unit->id, strerror(-unit->load_error)); + + if (type != JOB_STOP && unit->load_state == UNIT_MASKED) + return sd_bus_error_setf(e, BUS_ERROR_UNIT_MASKED, + "Unit %s is masked.", unit->id); + + if (!unit_job_is_applicable(unit, type)) + return sd_bus_error_setf(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, + "Job type %s is not applicable for unit %s.", + job_type_to_string(type), unit->id); - 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. */ ret = transaction_add_one_job(tr, type, unit, override, &is_new); @@ -870,10 +915,12 @@ int transaction_add_job_and_dependencies( SET_FOREACH(dep, following, i) { r = transaction_add_job_and_dependencies(tr, type, dep, ret, false, override, false, false, ignore_order, e); if (r < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); + log_unit_warning(dep->id, + "Cannot add dependency job for unit %s, ignoring: %s", + dep->id, bus_error_message(e, r)); if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } @@ -889,7 +936,7 @@ int transaction_add_job_and_dependencies( goto fail; if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } @@ -900,29 +947,33 @@ int transaction_add_job_and_dependencies( goto fail; if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) { r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, !override, override, false, false, ignore_order, e); if (r < 0) { - log_full(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, - "Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); + log_unit_full(dep->id, + r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, + "Cannot add dependency job for unit %s, ignoring: %s", + dep->id, bus_error_message(e, r)); if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i) { r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, false, false, false, false, ignore_order, e); if (r < 0) { - log_full(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, - "Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); + log_unit_full(dep->id, + r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, + "Cannot add dependency job for unit %s, ignoring: %s", + dep->id, bus_error_message(e, r)); if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } @@ -933,18 +984,20 @@ int transaction_add_job_and_dependencies( goto fail; if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) { r = transaction_add_job_and_dependencies(tr, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e); if (r < 0) { - log_full(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, - "Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); + log_unit_full(dep->id, + r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, + "Cannot add dependency job for unit %s, ignoring: %s", + dep->id, bus_error_message(e, r)); if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } @@ -955,17 +1008,19 @@ int transaction_add_job_and_dependencies( goto fail; if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i) { r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e); if (r < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); + log_unit_warning(dep->id, + "Cannot add dependency job for unit %s, ignoring: %s", + dep->id, bus_error_message(e, r)); if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } @@ -980,7 +1035,7 @@ int transaction_add_job_and_dependencies( goto fail; if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } @@ -991,9 +1046,21 @@ int transaction_add_job_and_dependencies( goto fail; if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } + + SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONSISTS_OF], i) { + r = transaction_add_job_and_dependencies(tr, type, dep, ret, true, override, false, false, ignore_order, e); + if (r < 0) { + if (r != -EBADR) + goto fail; + + if (e) + sd_bus_error_free(e); + } + } + } if (type == JOB_RELOAD) { @@ -1001,10 +1068,12 @@ int transaction_add_job_and_dependencies( SET_FOREACH(dep, ret->unit->dependencies[UNIT_PROPAGATES_RELOAD_TO], i) { r = transaction_add_job_and_dependencies(tr, JOB_RELOAD, dep, ret, false, override, false, false, ignore_order, e); if (r < 0) { - log_warning("Cannot add dependency reload job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); + log_unit_warning(dep->id, + "Cannot add dependency reload job for unit %s, ignoring: %s", + dep->id, bus_error_message(e, r)); if (e) - dbus_error_free(e); + sd_bus_error_free(e); } } } @@ -1046,25 +1115,29 @@ int transaction_add_isolate_jobs(Transaction *tr, Manager *m) { r = transaction_add_job_and_dependencies(tr, JOB_STOP, u, tr->anchor_job, true, false, false, false, false, NULL); if (r < 0) - log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->id, strerror(-r)); + log_unit_warning(u->id, + "Cannot add isolate job for unit %s, ignoring: %s", + u->id, strerror(-r)); } return 0; } -Transaction *transaction_new(void) { +Transaction *transaction_new(bool irreversible) { Transaction *tr; tr = new0(Transaction, 1); if (!tr) return NULL; - tr->jobs = hashmap_new(trivial_hash_func, trivial_compare_func); + tr->jobs = hashmap_new(NULL); if (!tr->jobs) { free(tr); return NULL; } + tr->irreversible = irreversible; + return tr; }