[PATCH v4 7/8] migration/multifd: fix zlib and zstd compression levels not working

[Yuan Liu <yuan1.liu@intel.com>]

add zlib and zstd compression levels in multifd parameter
testing and application and add compression level tests

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Reviewed-by: Nanhai Zou <nanhai.zou@intel.com>
Reported-by: Xiaohui Li <xiaohli@redhat.com>
---
 migration/options.c          | 12 ++++++++++++
 tests/qtest/migration-test.c | 16 ++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/migration/options.c b/migration/options.c
index 3e3e0b93b4..1cd3cc7c33 100644
--- a/migration/options.c
+++ b/migration/options.c
@@ -1312,6 +1312,12 @@ static void migrate_params_test_apply(MigrateSetParameters *params,
     if (params->has_multifd_compression) {
         dest->multifd_compression = params->multifd_compression;
     }
+    if (params->has_multifd_zlib_level) {
+        dest->multifd_zlib_level = params->multifd_zlib_level;
+    }
+    if (params->has_multifd_zstd_level) {
+        dest->multifd_zstd_level = params->multifd_zstd_level;
+    }
     if (params->has_xbzrle_cache_size) {
         dest->xbzrle_cache_size = params->xbzrle_cache_size;
     }
@@ -1447,6 +1453,12 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
     if (params->has_multifd_compression) {
         s->parameters.multifd_compression = params->multifd_compression;
     }
+    if (params->has_multifd_zlib_level) {
+        s->parameters.multifd_zlib_level = params->multifd_zlib_level;
+    }
+    if (params->has_multifd_zstd_level) {
+        s->parameters.multifd_zstd_level = params->multifd_zstd_level;
+    }
     if (params->has_xbzrle_cache_size) {
         s->parameters.xbzrle_cache_size = params->xbzrle_cache_size;
         xbzrle_cache_resize(params->xbzrle_cache_size, errp);
diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 8a5bb1752e..23d50fe599 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -2621,10 +2621,24 @@ test_migrate_precopy_tcp_multifd_start(QTestState *from,
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
 }
 
+static void
+test_and_set_multifd_compression_level(QTestState *who, const char *param)
+{
+    /* The default compression level is 1, test a level other than 1 */
+    int level = 2;
+
+    migrate_set_parameter_int(who, param, level);
+    migrate_check_parameter_int(who, param, level);
+    /* only test compression level 1 during migration */
+    migrate_set_parameter_int(who, param, 1);
+}
+
 static void *
 test_migrate_precopy_tcp_multifd_zlib_start(QTestState *from,
                                             QTestState *to)
 {
+    /* the compression level is used only on the source side. */
+    test_and_set_multifd_compression_level(from, "multifd-zlib-level");
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "zlib");
 }
 
@@ -2633,6 +2647,8 @@ static void *
 test_migrate_precopy_tcp_multifd_zstd_start(QTestState *from,
                                             QTestState *to)
 {
+    /* the compression level is used only on the source side. */
+    test_and_set_multifd_compression_level(from, "multifd-zstd-level");
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "zstd");
 }
 #endif /* CONFIG_ZSTD */
-- 
2.39.3