[PATCH V5 16/23] migration-test: memory_backend

[Steve Sistare <steven.sistare@oracle.com>]

Allow each migration test to define its own memory backend, replacing
the standard "-m <size>" specification.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
---
 tests/qtest/migration/framework.c | 15 +++++++++++----
 tests/qtest/migration/framework.h |  5 +++++
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/tests/qtest/migration/framework.c b/tests/qtest/migration/framework.c
index a902936..89a3344 100644
--- a/tests/qtest/migration/framework.c
+++ b/tests/qtest/migration/framework.c
@@ -212,6 +212,7 @@ int migrate_start(QTestState **from, QTestState **to, const char *uri,
     const char *machine_alias, *machine_opts = "";
     g_autofree char *machine = NULL;
     const char *bootpath;
+    g_autofree char *memory_backend = NULL;
 
     if (args->use_shmem) {
         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
@@ -287,6 +288,12 @@ int migrate_start(QTestState **from, QTestState **to, const char *uri,
             memory_size, shmem_path);
     }
 
+    if (args->memory_backend) {
+        memory_backend = g_strdup_printf(args->memory_backend, memory_size);
+    } else {
+        memory_backend = g_strdup_printf("-m %s ", memory_size);
+    }
+
     if (args->use_dirty_ring) {
         kvm_opts = ",dirty-ring-size=4096";
     }
@@ -305,12 +312,12 @@ int migrate_start(QTestState **from, QTestState **to, const char *uri,
     cmd_source = g_strdup_printf("-accel kvm%s -accel tcg "
                                  "-machine %s,%s "
                                  "-name source,debug-threads=on "
-                                 "-m %s "
+                                 "%s "
                                  "-serial file:%s/src_serial "
                                  "%s %s %s %s %s",
                                  kvm_opts ? kvm_opts : "",
                                  machine, machine_opts,
-                                 memory_size, tmpfs,
+                                 memory_backend, tmpfs,
                                  arch_opts ? arch_opts : "",
                                  arch_source ? arch_source : "",
                                  shmem_opts ? shmem_opts : "",
@@ -326,13 +333,13 @@ int migrate_start(QTestState **from, QTestState **to, const char *uri,
     cmd_target = g_strdup_printf("-accel kvm%s -accel tcg "
                                  "-machine %s,%s "
                                  "-name target,debug-threads=on "
-                                 "-m %s "
+                                 "%s "
                                  "-serial file:%s/dest_serial "
                                  "-incoming %s "
                                  "%s %s %s %s %s",
                                  kvm_opts ? kvm_opts : "",
                                  machine, machine_opts,
-                                 memory_size, tmpfs, uri,
+                                 memory_backend, tmpfs, uri,
                                  arch_opts ? arch_opts : "",
                                  arch_target ? arch_target : "",
                                  shmem_opts ? shmem_opts : "",
diff --git a/tests/qtest/migration/framework.h b/tests/qtest/migration/framework.h
index e9fc4ec..d368fcf 100644
--- a/tests/qtest/migration/framework.h
+++ b/tests/qtest/migration/framework.h
@@ -109,6 +109,11 @@ typedef struct {
     const char *opts_target;
     /* suspend the src before migrating to dest. */
     bool suspend_me;
+    /*
+     * Format string for the main memory backend, containing one %s where the
+     * size is plugged in.  If omitted, "-m %s" is used.
+     */
+    const char *memory_backend;
 } MigrateStart;
 
 typedef enum PostcopyRecoveryFailStage {
-- 
1.8.3.1