chiark / gitweb /
hashmap: introduce hash_ops to make struct Hashmap smaller
[elogind.git] / src / core / transaction.c
index fa97b6975560d823a4d700fbd6eea66923bdd5bf..dbb4133fe38f853f893a3c90b72082002414e7d8 100644 (file)
 #include <unistd.h>
 #include <fcntl.h>
 
-#include "transaction.h"
 #include "bus-errors.h"
-#include "dbus-common.h"
+#include "bus-util.h"
+#include "bus-error.h"
+#include "transaction.h"
 
 static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies);
 
@@ -222,7 +223,9 @@ static int delete_one_unmergeable_job(Transaction *tr, Job *j) {
 
                         /* Ok, we can drop one, so let's do so. */
                         log_debug_unit(d->unit->id,
-                                       "Fixing conflicting jobs by deleting job %s/%s",
+                                       "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;
@@ -231,7 +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;
@@ -261,8 +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);
+                        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);
                         return r;
                 }
         }
@@ -334,7 +341,7 @@ _pure_ 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;
@@ -344,7 +351,7 @@ 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 cycle we try to break it. */
 
         /* Have we seen this before? */
         if (j->generation == generation) {
@@ -371,10 +378,10 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi
 
                         /* logging for j not k here here to provide consistent narrative */
                         log_info_unit(j->unit->id,
-                                      "Walked on cycle path to %s/%s",
+                                      "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. */
@@ -405,8 +412,8 @@ static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsi
 
                 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.");
+                sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC,
+                                  "Transaction order is cyclic. See system logs for details.");
                 return -ENOEXEC;
         }
 
@@ -445,7 +452,7 @@ 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;
@@ -490,7 +497,7 @@ rescan:
         }
 }
 
-static int transaction_is_destructive(Transaction *tr, JobMode mode, DBusError *e) {
+static int transaction_is_destructive(Transaction *tr, JobMode mode, sd_bus_error *e) {
         Iterator i;
         Job *j;
 
@@ -508,7 +515,8 @@ static int transaction_is_destructive(Transaction *tr, JobMode mode, DBusError *
                 if (j->unit->job && (mode == JOB_FAIL || j->unit->job->irreversible) &&
                     !job_type_is_superset(j->type, j->unit->job->type)) {
 
-                        dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive.");
+                        sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE,
+                                          "Transaction is destructive.");
                         return -EEXIST;
                 }
         }
@@ -576,7 +584,7 @@ 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 */
@@ -635,7 +643,7 @@ 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;
@@ -677,7 +685,7 @@ 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;
                 }
 
@@ -694,7 +702,7 @@ 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;
                 }
 
@@ -713,7 +721,7 @@ int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e
         /* Ninth step: check whether we can actually apply this */
         r = transaction_is_destructive(tr, mode, e);
         if (r < 0) {
-                log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r));
+                log_notice("Requested transaction contradicts existing jobs: %s", bus_error_message(e, r));
                 return r;
         }
 
@@ -733,8 +741,11 @@ 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;
@@ -772,10 +783,10 @@ static Job* transaction_add_one_job(Transaction *tr, JobType type, Unit *unit, b
         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;
         }
@@ -832,7 +843,7 @@ 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;
@@ -851,28 +862,46 @@ int transaction_add_job_and_dependencies(
 
         if (unit->load_state != UNIT_LOADED &&
             unit->load_state != UNIT_ERROR &&
+            unit->load_state != UNIT_NOT_FOUND &&
             unit->load_state != UNIT_MASKED) {
-                dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id);
+                sd_bus_error_setf(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);
+                if (unit->load_error == -ENOENT || unit->manager->test_run)
+                        sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED,
+                                          "Unit %s failed to load: %s.",
+                                          unit->id,
+                                          strerror(-unit->load_error));
+                else
+                        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);
+                return -EINVAL;
+        }
+
+        if (type != JOB_STOP && unit->load_state == UNIT_NOT_FOUND) {
+                sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED,
+                                  "Unit %s failed to load: %s.",
+                                  unit->id, strerror(-unit->load_error));
                 return -EINVAL;
         }
 
         if (type != JOB_STOP && unit->load_state == UNIT_MASKED) {
-                dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->id);
+                sd_bus_error_setf(e, BUS_ERROR_UNIT_MASKED,
+                                  "Unit %s is masked.", unit->id);
                 return -EADDRNOTAVAIL;
         }
 
         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);
+                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);
                 return -EBADR;
         }
 
@@ -904,10 +933,10 @@ int transaction_add_job_and_dependencies(
                                 if (r < 0) {
                                         log_warning_unit(dep->id,
                                                          "Cannot add dependency job for unit %s, ignoring: %s",
-                                                         dep->id, bus_error(e, r));
+                                                         dep->id, bus_error_message(e, r));
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -923,7 +952,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -934,7 +963,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -943,10 +972,10 @@ int transaction_add_job_and_dependencies(
                                 if (r < 0) {
                                         log_full_unit(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, dep->id,
                                                       "Cannot add dependency job for unit %s, ignoring: %s",
-                                                      dep->id, bus_error(e, r));
+                                                      dep->id, bus_error_message(e, r));
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -955,10 +984,10 @@ int transaction_add_job_and_dependencies(
                                 if (r < 0) {
                                         log_full_unit(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, dep->id,
                                                       "Cannot add dependency job for unit %s, ignoring: %s",
-                                                      dep->id, bus_error(e, r));
+                                                      dep->id, bus_error_message(e, r));
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -969,7 +998,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -978,10 +1007,10 @@ int transaction_add_job_and_dependencies(
                                 if (r < 0) {
                                         log_full_unit(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, dep->id,
                                                       "Cannot add dependency job for unit %s, ignoring: %s",
-                                                      dep->id, bus_error(e, r));
+                                                      dep->id, bus_error_message(e, r));
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -992,7 +1021,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -1001,10 +1030,10 @@ int transaction_add_job_and_dependencies(
                                 if (r < 0) {
                                         log_warning_unit(dep->id,
                                                          "Cannot add dependency job for unit %s, ignoring: %s",
-                                                         dep->id, bus_error(e, r));
+                                                         dep->id, bus_error_message(e, r));
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -1019,7 +1048,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -1030,7 +1059,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -1041,7 +1070,7 @@ int transaction_add_job_and_dependencies(
                                                 goto fail;
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
 
@@ -1054,10 +1083,10 @@ int transaction_add_job_and_dependencies(
                                 if (r < 0) {
                                         log_warning_unit(dep->id,
                                                          "Cannot add dependency reload job for unit %s, ignoring: %s",
-                                                         dep->id, bus_error(e, r));
+                                                         dep->id, bus_error_message(e, r));
 
                                         if (e)
-                                                dbus_error_free(e);
+                                                sd_bus_error_free(e);
                                 }
                         }
                 }
@@ -1114,7 +1143,7 @@ Transaction *transaction_new(bool irreversible) {
         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;