[Qemu-devel] [PULL 08/15] migrate: Use boxed qapi for migrate-set-parameters

[Juan Quintela <quintela@redhat.com>]

From: Eric Blake <eblake@redhat.com>

Now that QAPI makes it easy to pass a struct around, we don't
have to declare as many parameters or local variables.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 hmp.c                 | 40 ++++++++++++++-----------------
 migration/migration.c | 65 +++++++++++++++++++++------------------------------
 qapi-schema.json      |  2 +-
 3 files changed, 46 insertions(+), 61 deletions(-)

diff --git a/hmp.c b/hmp.c
index c405d3e..4c0f600 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1325,44 +1325,40 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
     const char *valuestr = qdict_get_str(qdict, "value");
     long valueint = 0;
     Error *err = NULL;
-    bool has_compress_level = false;
-    bool has_compress_threads = false;
-    bool has_decompress_threads = false;
-    bool has_cpu_throttle_initial = false;
-    bool has_cpu_throttle_increment = false;
-    bool has_tls_creds = false;
-    bool has_tls_hostname = false;
     bool use_int_value = false;
     int i;

     for (i = 0; i < MIGRATION_PARAMETER__MAX; i++) {
         if (strcmp(param, MigrationParameter_lookup[i]) == 0) {
+            MigrationParameters p = { 0 };
             switch (i) {
             case MIGRATION_PARAMETER_COMPRESS_LEVEL:
-                has_compress_level = true;
+                p.has_compress_level = true;
                 use_int_value = true;
                 break;
             case MIGRATION_PARAMETER_COMPRESS_THREADS:
-                has_compress_threads = true;
+                p.has_compress_threads = true;
                 use_int_value = true;
                 break;
             case MIGRATION_PARAMETER_DECOMPRESS_THREADS:
-                has_decompress_threads = true;
+                p.has_decompress_threads = true;
                 use_int_value = true;
                 break;
             case MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL:
-                has_cpu_throttle_initial = true;
+                p.has_cpu_throttle_initial = true;
                 use_int_value = true;
                 break;
             case MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT:
-                has_cpu_throttle_increment = true;
+                p.has_cpu_throttle_increment = true;
                 use_int_value = true;
                 break;
             case MIGRATION_PARAMETER_TLS_CREDS:
-                has_tls_creds = true;
+                p.has_tls_creds = true;
+                p.tls_creds = (char *) valuestr;
                 break;
             case MIGRATION_PARAMETER_TLS_HOSTNAME:
-                has_tls_hostname = true;
+                p.has_tls_hostname = true;
+                p.tls_hostname = (char *) valuestr;
                 break;
             }

@@ -1372,16 +1368,16 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
                                valuestr);
                     goto cleanup;
                 }
+                /* Set all integers; only one has_FOO will be set, and
+                 * the code ignores the remaining values */
+                p.compress_level = valueint;
+                p.compress_threads = valueint;
+                p.decompress_threads = valueint;
+                p.cpu_throttle_initial = valueint;
+                p.cpu_throttle_increment = valueint;
             }

-            qmp_migrate_set_parameters(has_compress_level, valueint,
-                                       has_compress_threads, valueint,
-                                       has_decompress_threads, valueint,
-                                       has_cpu_throttle_initial, valueint,
-                                       has_cpu_throttle_increment, valueint,
-                                       has_tls_creds, valuestr,
-                                       has_tls_hostname, valuestr,
-                                       &err);
+            qmp_migrate_set_parameters(&p, &err);
             break;
         }
     }
diff --git a/migration/migration.c b/migration/migration.c
index 1a8f26b..42336e3 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -766,78 +766,67 @@ void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
     }
 }

-void qmp_migrate_set_parameters(bool has_compress_level,
-                                int64_t compress_level,
-                                bool has_compress_threads,
-                                int64_t compress_threads,
-                                bool has_decompress_threads,
-                                int64_t decompress_threads,
-                                bool has_cpu_throttle_initial,
-                                int64_t cpu_throttle_initial,
-                                bool has_cpu_throttle_increment,
-                                int64_t cpu_throttle_increment,
-                                bool has_tls_creds,
-                                const char *tls_creds,
-                                bool has_tls_hostname,
-                                const char *tls_hostname,
-                                Error **errp)
+void qmp_migrate_set_parameters(MigrationParameters *params, Error **errp)
 {
     MigrationState *s = migrate_get_current();

-    if (has_compress_level && (compress_level < 0 || compress_level > 9)) {
+    if (params->has_compress_level &&
+        (params->compress_level < 0 || params->compress_level > 9)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level",
                    "is invalid, it should be in the range of 0 to 9");
         return;
     }
-    if (has_compress_threads &&
-            (compress_threads < 1 || compress_threads > 255)) {
+    if (params->has_compress_threads &&
+        (params->compress_threads < 1 || params->compress_threads > 255)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "compress_threads",
                    "is invalid, it should be in the range of 1 to 255");
         return;
     }
-    if (has_decompress_threads &&
-            (decompress_threads < 1 || decompress_threads > 255)) {
+    if (params->has_decompress_threads &&
+        (params->decompress_threads < 1 || params->decompress_threads > 255)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "decompress_threads",
                    "is invalid, it should be in the range of 1 to 255");
         return;
     }
-    if (has_cpu_throttle_initial &&
-            (cpu_throttle_initial < 1 || cpu_throttle_initial > 99)) {
+    if (params->has_cpu_throttle_initial &&
+        (params->cpu_throttle_initial < 1 ||
+         params->cpu_throttle_initial > 99)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "cpu_throttle_initial",
                    "an integer in the range of 1 to 99");
     }
-    if (has_cpu_throttle_increment &&
-            (cpu_throttle_increment < 1 || cpu_throttle_increment > 99)) {
+    if (params->has_cpu_throttle_increment &&
+        (params->cpu_throttle_increment < 1 ||
+         params->cpu_throttle_increment > 99)) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
                    "cpu_throttle_increment",
                    "an integer in the range of 1 to 99");
     }

-    if (has_compress_level) {
-        s->parameters.compress_level = compress_level;
+    if (params->has_compress_level) {
+        s->parameters.compress_level = params->compress_level;
     }
-    if (has_compress_threads) {
-        s->parameters.compress_threads = compress_threads;
+    if (params->has_compress_threads) {
+        s->parameters.compress_threads = params->compress_threads;
     }
-    if (has_decompress_threads) {
-        s->parameters.decompress_threads = decompress_threads;
+    if (params->has_decompress_threads) {
+        s->parameters.decompress_threads = params->decompress_threads;
     }
-    if (has_cpu_throttle_initial) {
-        s->parameters.cpu_throttle_initial = cpu_throttle_initial;
+    if (params->has_cpu_throttle_initial) {
+        s->parameters.cpu_throttle_initial = params->cpu_throttle_initial;
     }
-    if (has_cpu_throttle_increment) {
-        s->parameters.cpu_throttle_increment = cpu_throttle_increment;
+    if (params->has_cpu_throttle_increment) {
+        s->parameters.cpu_throttle_increment = params->cpu_throttle_increment;
     }
-    if (has_tls_creds) {
+    if (params->has_tls_creds) {
         g_free(s->parameters.tls_creds);
-        s->parameters.tls_creds = g_strdup(tls_creds);
+        s->parameters.tls_creds = g_strdup(params->tls_creds);
     }
-    if (has_tls_hostname) {
+    if (params->has_tls_hostname) {
         g_free(s->parameters.tls_hostname);
-        s->parameters.tls_hostname = g_strdup(tls_hostname);
+        s->parameters.tls_hostname = g_strdup(params->tls_hostname);
     }
 }

diff --git a/qapi-schema.json b/qapi-schema.json
index e16e889..58bed71 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -672,7 +672,7 @@
 #
 # Since: 2.4
 ##
-{ 'command': 'migrate-set-parameters',
+{ 'command': 'migrate-set-parameters', 'boxed': true,
   'data': 'MigrationParameters' }

 #
-- 
2.7.4