From 5050ad2a380832a62c7dedda147bbee06c8fe924 Mon Sep 17 00:00:00 2001 From: Fabiano Rosas Date: Wed, 18 Oct 2023 16:27:39 -0300 Subject: [PATCH] tests/qtest/migration: Support more than one QEMU binary We have strict rules around migration compatibility between different QEMU versions but no test to validate the migration state between different binaries. Add infrastructure to allow running the migration tests with two different QEMU binaries as migration source and destination. The code now recognizes two new environment variables QTEST_QEMU_BINARY_SRC and QTEST_QEMU_BINARY_DST. In the absence of either of them, the test will use the QTEST_QEMU_BINARY variable. If both are missing then the tests are run with single binary as previously. The machine type is selected automatically as the latest machine type version that works with both binaries. Usage (only one of SRC|DST is allowed): QTEST_QEMU_BINARY_SRC=../build-8.2.0/qemu-system-x86_64 \ QTEST_QEMU_BINARY=../build-8.1.0/qemu-system-x86_64 \ ./tests/qtest/migration-test Reviewed-by: Juan Quintela Signed-off-by: Fabiano Rosas Reviewed-by: Thomas Huth Signed-off-by: Juan Quintela Message-ID: <20231018192741.25885-11-farosas@suse.de> --- tests/qtest/migration-test.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index 03f3feac7b..4a5d37317a 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -71,6 +71,8 @@ static bool got_dst_resume; #define QEMU_VM_FILE_MAGIC 0x5145564d #define FILE_TEST_FILENAME "migfile" #define FILE_TEST_OFFSET 0x1000 +#define QEMU_ENV_SRC "QTEST_QEMU_BINARY_SRC" +#define QEMU_ENV_DST "QTEST_QEMU_BINARY_DST" #if defined(__linux__) #include @@ -744,6 +746,7 @@ static int test_migrate_start(QTestState **from, QTestState **to, const char *arch = qtest_get_arch(); const char *memory_size; const char *machine_alias, *machine_opts = ""; + g_autofree char *machine = NULL; if (args->use_shmem) { if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) { @@ -822,6 +825,10 @@ static int test_migrate_start(QTestState **from, QTestState **to, kvm_opts = ",dirty-ring-size=4096"; } + machine = find_common_machine_version(machine_alias, QEMU_ENV_SRC, + QEMU_ENV_DST); + g_test_message("Using machine type: %s", machine); + cmd_source = g_strdup_printf("-accel kvm%s -accel tcg " "-machine %s,%s " "-name source,debug-threads=on " @@ -829,7 +836,7 @@ static int test_migrate_start(QTestState **from, QTestState **to, "-serial file:%s/src_serial " "%s %s %s %s %s", kvm_opts ? kvm_opts : "", - machine_alias, machine_opts, + machine, machine_opts, memory_size, tmpfs, arch_opts ? arch_opts : "", arch_source ? arch_source : "", @@ -837,7 +844,7 @@ static int test_migrate_start(QTestState **from, QTestState **to, args->opts_source ? args->opts_source : "", ignore_stderr); if (!args->only_target) { - *from = qtest_init(cmd_source); + *from = qtest_init_with_env(QEMU_ENV_SRC, cmd_source); qtest_qmp_set_event_callback(*from, migrate_watch_for_stop, &got_src_stop); @@ -851,14 +858,14 @@ static int test_migrate_start(QTestState **from, QTestState **to, "-incoming %s " "%s %s %s %s %s", kvm_opts ? kvm_opts : "", - machine_alias, machine_opts, + machine, machine_opts, memory_size, tmpfs, uri, arch_opts ? arch_opts : "", arch_target ? arch_target : "", shmem_opts ? shmem_opts : "", args->opts_target ? args->opts_target : "", ignore_stderr); - *to = qtest_init(cmd_target); + *to = qtest_init_with_env(QEMU_ENV_DST, cmd_target); qtest_qmp_set_event_callback(*to, migrate_watch_for_resume, &got_dst_resume); @@ -2989,10 +2996,23 @@ int main(int argc, char **argv) bool has_uffd; const char *arch; g_autoptr(GError) err = NULL; + const char *qemu_src = getenv(QEMU_ENV_SRC); + const char *qemu_dst = getenv(QEMU_ENV_DST); int ret; g_test_init(&argc, &argv, NULL); + /* + * The default QTEST_QEMU_BINARY must always be provided because + * that is what helpers use to query the accel type and + * architecture. + */ + if (qemu_src && qemu_dst) { + g_test_message("Only one of %s, %s is allowed", + QEMU_ENV_SRC, QEMU_ENV_DST); + exit(1); + } + has_kvm = qtest_has_accel("kvm"); has_tcg = qtest_has_accel("tcg");