qemu

migration-test.c (78345B)

---

 /*
  * QTest testcase for migration
  *
  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
  *   based on the vhost-user-test.c that is:
  *      Copyright (c) 2014 Virtual Open Systems Sarl.
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  *
  */
 
 #include "qemu/osdep.h"
 
 #include "libqtest.h"
 #include "qapi/error.h"
 #include "qapi/qmp/qdict.h"
 #include "qemu/module.h"
 #include "qemu/option.h"
 #include "qemu/range.h"
 #include "qemu/sockets.h"
 #include "chardev/char.h"
 #include "qapi/qapi-visit-sockets.h"
 #include "qapi/qobject-input-visitor.h"
 #include "qapi/qobject-output-visitor.h"
 #include "crypto/tlscredspsk.h"
 #include "qapi/qmp/qlist.h"
 
 #include "migration-helpers.h"
 #include "tests/migration/migration-test.h"
 #ifdef CONFIG_GNUTLS
 # include "tests/unit/crypto-tls-psk-helpers.h"
 # ifdef CONFIG_TASN1
 #  include "tests/unit/crypto-tls-x509-helpers.h"
 # endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
 /* For dirty ring test; so far only x86_64 is supported */
 #if defined(__linux__) && defined(HOST_X86_64)
 #include "linux/kvm.h"
 #endif
 
 /* TODO actually test the results and get rid of this */
 #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
 
 unsigned start_address;
 unsigned end_address;
 static bool uffd_feature_thread_id;
 
 /*
  * Dirtylimit stop working if dirty page rate error
  * value less than DIRTYLIMIT_TOLERANCE_RANGE
  */
 #define DIRTYLIMIT_TOLERANCE_RANGE  25  /* MB/s */
 
 #if defined(__linux__)
 #include <sys/syscall.h>
 #include <sys/vfs.h>
 #endif
 
 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
 #include <sys/eventfd.h>
 #include <sys/ioctl.h>
 #include <linux/userfaultfd.h>
 
 static bool ufd_version_check(void)
 {
     struct uffdio_api api_struct;
     uint64_t ioctl_mask;
 
     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
 
     if (ufd == -1) {
         g_test_message("Skipping test: userfaultfd not available");
         return false;
     }
 
     api_struct.api = UFFD_API;
     api_struct.features = 0;
     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
         g_test_message("Skipping test: UFFDIO_API failed");
         return false;
     }
     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
 
     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
                  (__u64)1 << _UFFDIO_UNREGISTER;
     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
         g_test_message("Skipping test: Missing userfault feature");
         return false;
     }
 
     return true;
 }
 
 #else
 static bool ufd_version_check(void)
 {
     g_test_message("Skipping test: Userfault not available (builtdtime)");
     return false;
 }
 
 #endif
 
 static char *tmpfs;
 
 /* The boot file modifies memory area in [start_address, end_address)
  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
  */
 #include "tests/migration/i386/a-b-bootblock.h"
 #include "tests/migration/aarch64/a-b-kernel.h"
 #include "tests/migration/s390x/a-b-bios.h"
 
 static void init_bootfile(const char *bootpath, void *content, size_t len)
 {
     FILE *bootfile = fopen(bootpath, "wb");
 
     g_assert_cmpint(fwrite(content, len, 1, bootfile), ==, 1);
     fclose(bootfile);
 }
 
 /*
  * Wait for some output in the serial output file,
  * we get an 'A' followed by an endless string of 'B's
  * but on the destination we won't have the A.
  */
 static void wait_for_serial(const char *side)
 {
     g_autofree char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
     FILE *serialfile = fopen(serialpath, "r");
     const char *arch = qtest_get_arch();
     int started = (strcmp(side, "src_serial") == 0 &&
                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 
     do {
         int readvalue = fgetc(serialfile);
 
         if (!started) {
             /* SLOF prints its banner before starting test,
              * to ignore it, mark the start of the test with '_',
              * ignore all characters until this marker
              */
             switch (readvalue) {
             case '_':
                 started = 1;
                 break;
             case EOF:
                 fseek(serialfile, 0, SEEK_SET);
                 usleep(1000);
                 break;
             }
             continue;
         }
         switch (readvalue) {
         case 'A':
             /* Fine */
             break;
 
         case 'B':
             /* It's alive! */
             fclose(serialfile);
             return;
 
         case EOF:
             started = (strcmp(side, "src_serial") == 0 &&
                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
             fseek(serialfile, 0, SEEK_SET);
             usleep(1000);
             break;
 
         default:
             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
             g_assert_not_reached();
         }
     } while (true);
 }
 
 /*
  * It's tricky to use qemu's migration event capability with qtest,
  * events suddenly appearing confuse the qmp()/hmp() responses.
  */
 
 static int64_t read_ram_property_int(QTestState *who, const char *property)
 {
     QDict *rsp_return, *rsp_ram;
     int64_t result;
 
     rsp_return = migrate_query_not_failed(who);
     if (!qdict_haskey(rsp_return, "ram")) {
         /* Still in setup */
         result = 0;
     } else {
         rsp_ram = qdict_get_qdict(rsp_return, "ram");
         result = qdict_get_try_int(rsp_ram, property, 0);
     }
     qobject_unref(rsp_return);
     return result;
 }
 
 static int64_t read_migrate_property_int(QTestState *who, const char *property)
 {
     QDict *rsp_return;
     int64_t result;
 
     rsp_return = migrate_query_not_failed(who);
     result = qdict_get_try_int(rsp_return, property, 0);
     qobject_unref(rsp_return);
     return result;
 }
 
 static uint64_t get_migration_pass(QTestState *who)
 {
     return read_ram_property_int(who, "dirty-sync-count");
 }
 
 static void read_blocktime(QTestState *who)
 {
     QDict *rsp_return;
 
     rsp_return = migrate_query_not_failed(who);
     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
     qobject_unref(rsp_return);
 }
 
 static void wait_for_migration_pass(QTestState *who)
 {
     uint64_t initial_pass = get_migration_pass(who);
     uint64_t pass;
 
     /* Wait for the 1st sync */
     while (!got_stop && !initial_pass) {
         usleep(1000);
         initial_pass = get_migration_pass(who);
     }
 
     do {
         usleep(1000);
         pass = get_migration_pass(who);
     } while (pass == initial_pass && !got_stop);
 }
 
 static void check_guests_ram(QTestState *who)
 {
     /* Our ASM test will have been incrementing one byte from each page from
      * start_address to < end_address in order. This gives us a constraint
      * that any page's byte should be equal or less than the previous pages
      * byte (mod 256); and they should all be equal except for one transition
      * at the point where we meet the incrementer. (We're running this with
      * the guest stopped).
      */
     unsigned address;
     uint8_t first_byte;
     uint8_t last_byte;
     bool hit_edge = false;
     int bad = 0;
 
     qtest_memread(who, start_address, &first_byte, 1);
     last_byte = first_byte;
 
     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
          address += TEST_MEM_PAGE_SIZE)
     {
         uint8_t b;
         qtest_memread(who, address, &b, 1);
         if (b != last_byte) {
             if (((b + 1) % 256) == last_byte && !hit_edge) {
                 /* This is OK, the guest stopped at the point of
                  * incrementing the previous page but didn't get
                  * to us yet.
                  */
                 hit_edge = true;
                 last_byte = b;
             } else {
                 bad++;
                 if (bad <= 10) {
                     fprintf(stderr, "Memory content inconsistency at %x"
                             " first_byte = %x last_byte = %x current = %x"
                             " hit_edge = %x\n",
                             address, first_byte, last_byte, b, hit_edge);
                 }
             }
         }
     }
     if (bad >= 10) {
         fprintf(stderr, "and in another %d pages", bad - 10);
     }
     g_assert(bad == 0);
 }
 
 static void cleanup(const char *filename)
 {
     g_autofree char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 
     unlink(path);
 }
 
 static char *SocketAddress_to_str(SocketAddress *addr)
 {
     switch (addr->type) {
     case SOCKET_ADDRESS_TYPE_INET:
         return g_strdup_printf("tcp:%s:%s",
                                addr->u.inet.host,
                                addr->u.inet.port);
     case SOCKET_ADDRESS_TYPE_UNIX:
         return g_strdup_printf("unix:%s",
                                addr->u.q_unix.path);
     case SOCKET_ADDRESS_TYPE_FD:
         return g_strdup_printf("fd:%s", addr->u.fd.str);
     case SOCKET_ADDRESS_TYPE_VSOCK:
         return g_strdup_printf("tcp:%s:%s",
                                addr->u.vsock.cid,
                                addr->u.vsock.port);
     default:
         return g_strdup("unknown address type");
     }
 }
 
 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 {
     QDict *rsp;
     char *result;
     SocketAddressList *addrs;
     Visitor *iv = NULL;
     QObject *object;
 
     rsp = migrate_query(who);
     object = qdict_get(rsp, parameter);
 
     iv = qobject_input_visitor_new(object);
     visit_type_SocketAddressList(iv, NULL, &addrs, &error_abort);
     visit_free(iv);
 
     /* we are only using a single address */
     result = SocketAddress_to_str(addrs->value);
 
     qapi_free_SocketAddressList(addrs);
     qobject_unref(rsp);
     return result;
 }
 
 static long long migrate_get_parameter_int(QTestState *who,
                                            const char *parameter)
 {
     QDict *rsp;
     long long result;
 
     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
     result = qdict_get_int(rsp, parameter);
     qobject_unref(rsp);
     return result;
 }
 
 static void migrate_check_parameter_int(QTestState *who, const char *parameter,
                                         long long value)
 {
     long long result;
 
     result = migrate_get_parameter_int(who, parameter);
     g_assert_cmpint(result, ==, value);
 }
 
 static void migrate_set_parameter_int(QTestState *who, const char *parameter,
                                       long long value)
 {
     QDict *rsp;
 
     rsp = qtest_qmp(who,
                     "{ 'execute': 'migrate-set-parameters',"
                     "'arguments': { %s: %lld } }",
                     parameter, value);
     g_assert(qdict_haskey(rsp, "return"));
     qobject_unref(rsp);
     migrate_check_parameter_int(who, parameter, value);
 }
 
 static char *migrate_get_parameter_str(QTestState *who,
                                        const char *parameter)
 {
     QDict *rsp;
     char *result;
 
     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
     result = g_strdup(qdict_get_str(rsp, parameter));
     qobject_unref(rsp);
     return result;
 }
 
 static void migrate_check_parameter_str(QTestState *who, const char *parameter,
                                         const char *value)
 {
     g_autofree char *result = migrate_get_parameter_str(who, parameter);
     g_assert_cmpstr(result, ==, value);
 }
 
 static void migrate_set_parameter_str(QTestState *who, const char *parameter,
                                       const char *value)
 {
     QDict *rsp;
 
     rsp = qtest_qmp(who,
                     "{ 'execute': 'migrate-set-parameters',"
                     "'arguments': { %s: %s } }",
                     parameter, value);
     g_assert(qdict_haskey(rsp, "return"));
     qobject_unref(rsp);
     migrate_check_parameter_str(who, parameter, value);
 }
 
 static void migrate_ensure_non_converge(QTestState *who)
 {
     /* Can't converge with 1ms downtime + 30 mbs bandwidth limit */
     migrate_set_parameter_int(who, "max-bandwidth", 30 * 1000 * 1000);
     migrate_set_parameter_int(who, "downtime-limit", 1);
 }
 
 static void migrate_ensure_converge(QTestState *who)
 {
     /* Should converge with 30s downtime + 1 gbs bandwidth limit */
     migrate_set_parameter_int(who, "max-bandwidth", 1 * 1000 * 1000 * 1000);
     migrate_set_parameter_int(who, "downtime-limit", 30 * 1000);
 }
 
 static void migrate_pause(QTestState *who)
 {
     QDict *rsp;
 
     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
     qobject_unref(rsp);
 }
 
 static void migrate_continue(QTestState *who, const char *state)
 {
     QDict *rsp;
 
     rsp = wait_command(who,
                        "{ 'execute': 'migrate-continue',"
                        "  'arguments': { 'state': %s } }",
                        state);
     qobject_unref(rsp);
 }
 
 static void migrate_recover(QTestState *who, const char *uri)
 {
     QDict *rsp;
 
     rsp = wait_command(who,
                        "{ 'execute': 'migrate-recover', "
                        "  'id': 'recover-cmd', "
                        "  'arguments': { 'uri': %s } }",
                        uri);
     qobject_unref(rsp);
 }
 
 static void migrate_cancel(QTestState *who)
 {
     QDict *rsp;
 
     rsp = wait_command(who, "{ 'execute': 'migrate_cancel' }");
     qobject_unref(rsp);
 }
 
 static void migrate_set_capability(QTestState *who, const char *capability,
                                    bool value)
 {
     QDict *rsp;
 
     rsp = qtest_qmp(who,
                     "{ 'execute': 'migrate-set-capabilities',"
                     "'arguments': { "
                     "'capabilities': [ { "
                     "'capability': %s, 'state': %i } ] } }",
                     capability, value);
     g_assert(qdict_haskey(rsp, "return"));
     qobject_unref(rsp);
 }
 
 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 {
     QDict *rsp;
 
     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
     qobject_unref(rsp);
 
     if (!got_stop) {
         qtest_qmp_eventwait(from, "STOP");
     }
 
     qtest_qmp_eventwait(to, "RESUME");
 }
 
 typedef struct {
     /*
      * QTEST_LOG=1 may override this.  When QTEST_LOG=1, we always dump errors
      * unconditionally, because it means the user would like to be verbose.
      */
     bool hide_stderr;
     bool use_shmem;
     /* only launch the target process */
     bool only_target;
     /* Use dirty ring if true; dirty logging otherwise */
     bool use_dirty_ring;
     const char *opts_source;
     const char *opts_target;
 } MigrateStart;
 
 /*
  * A hook that runs after the src and dst QEMUs have been
  * created, but before the migration is started. This can
  * be used to set migration parameters and capabilities.
  *
  * Returns: NULL, or a pointer to opaque state to be
  *          later passed to the TestMigrateFinishHook
  */
 typedef void * (*TestMigrateStartHook)(QTestState *from,
                                        QTestState *to);
 
 /*
  * A hook that runs after the migration has finished,
  * regardless of whether it succeeded or failed, but
  * before QEMU has terminated (unless it self-terminated
  * due to migration error)
  *
  * @opaque is a pointer to state previously returned
  * by the TestMigrateStartHook if any, or NULL.
  */
 typedef void (*TestMigrateFinishHook)(QTestState *from,
                                       QTestState *to,
                                       void *opaque);
 
 typedef struct {
     /* Optional: fine tune start parameters */
     MigrateStart start;
 
     /* Required: the URI for the dst QEMU to listen on */
     const char *listen_uri;
 
     /*
      * Optional: the URI for the src QEMU to connect to
      * If NULL, then it will query the dst QEMU for its actual
      * listening address and use that as the connect address.
      * This allows for dynamically picking a free TCP port.
      */
     const char *connect_uri;
 
     /* Optional: callback to run at start to set migration parameters */
     TestMigrateStartHook start_hook;
     /* Optional: callback to run at finish to cleanup */
     TestMigrateFinishHook finish_hook;
 
     /*
      * Optional: normally we expect the migration process to complete.
      *
      * There can be a variety of reasons and stages in which failure
      * can happen during tests.
      *
      * If a failure is expected to happen at time of establishing
      * the connection, then MIG_TEST_FAIL will indicate that the dst
      * QEMU is expected to stay running and accept future migration
      * connections.
      *
      * If a failure is expected to happen while processing the
      * migration stream, then MIG_TEST_FAIL_DEST_QUIT_ERR will indicate
      * that the dst QEMU is expected to quit with non-zero exit status
      */
     enum {
         /* This test should succeed, the default */
         MIG_TEST_SUCCEED = 0,
         /* This test should fail, dest qemu should keep alive */
         MIG_TEST_FAIL,
         /* This test should fail, dest qemu should fail with abnormal status */
         MIG_TEST_FAIL_DEST_QUIT_ERR,
     } result;
 
     /* Optional: set number of migration passes to wait for */
     unsigned int iterations;
 
     /* Postcopy specific fields */
     void *postcopy_data;
     bool postcopy_preempt;
 } MigrateCommon;
 
 static int test_migrate_start(QTestState **from, QTestState **to,
                               const char *uri, MigrateStart *args)
 {
     g_autofree gchar *arch_source = NULL;
     g_autofree gchar *arch_target = NULL;
     g_autofree gchar *cmd_source = NULL;
     g_autofree gchar *cmd_target = NULL;
     const gchar *ignore_stderr;
     g_autofree char *bootpath = NULL;
     g_autofree char *shmem_opts = NULL;
     g_autofree char *shmem_path = NULL;
     const char *arch = qtest_get_arch();
     const char *machine_opts = NULL;
     const char *memory_size;
 
     if (args->use_shmem) {
         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
             g_test_skip("/dev/shm is not supported");
             return -1;
         }
     }
 
     got_stop = false;
     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
         /* the assembled x86 boot sector should be exactly one sector large */
         assert(sizeof(x86_bootsect) == 512);
         init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
         memory_size = "150M";
         arch_source = g_strdup_printf("-drive file=%s,format=raw", bootpath);
         arch_target = g_strdup(arch_source);
         start_address = X86_TEST_MEM_START;
         end_address = X86_TEST_MEM_END;
     } else if (g_str_equal(arch, "s390x")) {
         init_bootfile(bootpath, s390x_elf, sizeof(s390x_elf));
         memory_size = "128M";
         arch_source = g_strdup_printf("-bios %s", bootpath);
         arch_target = g_strdup(arch_source);
         start_address = S390_TEST_MEM_START;
         end_address = S390_TEST_MEM_END;
     } else if (strcmp(arch, "ppc64") == 0) {
         machine_opts = "vsmt=8";
         memory_size = "256M";
         start_address = PPC_TEST_MEM_START;
         end_address = PPC_TEST_MEM_END;
         arch_source = g_strdup_printf("-nodefaults "
                                       "-prom-env 'use-nvramrc?=true' -prom-env "
                                       "'nvramrc=hex .\" _\" begin %x %x "
                                       "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
                                       "until'", end_address, start_address);
         arch_target = g_strdup("");
     } else if (strcmp(arch, "aarch64") == 0) {
         init_bootfile(bootpath, aarch64_kernel, sizeof(aarch64_kernel));
         machine_opts = "virt,gic-version=max";
         memory_size = "150M";
         arch_source = g_strdup_printf("-cpu max "
                                       "-kernel %s",
                                       bootpath);
         arch_target = g_strdup(arch_source);
         start_address = ARM_TEST_MEM_START;
         end_address = ARM_TEST_MEM_END;
 
         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
     } else {
         g_assert_not_reached();
     }
 
     if (!getenv("QTEST_LOG") && args->hide_stderr) {
 #ifndef _WIN32
         ignore_stderr = "2>/dev/null";
 #else
         /*
          * On Windows the QEMU executable is created via CreateProcess() and
          * IO redirection does not work, so don't bother adding IO redirection
          * to the command line.
          */
         ignore_stderr = "";
 #endif
     } else {
         ignore_stderr = "";
     }
 
     if (args->use_shmem) {
         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
         shmem_opts = g_strdup_printf(
             "-object memory-backend-file,id=mem0,size=%s"
             ",mem-path=%s,share=on -numa node,memdev=mem0",
             memory_size, shmem_path);
     } else {
         shmem_path = NULL;
         shmem_opts = g_strdup("");
     }
 
     cmd_source = g_strdup_printf("-accel kvm%s -accel tcg%s%s "
                                  "-name source,debug-threads=on "
                                  "-m %s "
                                  "-serial file:%s/src_serial "
                                  "%s %s %s %s",
                                  args->use_dirty_ring ?
                                  ",dirty-ring-size=4096" : "",
                                  machine_opts ? " -machine " : "",
                                  machine_opts ? machine_opts : "",
                                  memory_size, tmpfs,
                                  arch_source, shmem_opts,
                                  args->opts_source ? args->opts_source : "",
                                  ignore_stderr);
     if (!args->only_target) {
         *from = qtest_init(cmd_source);
     }
 
     cmd_target = g_strdup_printf("-accel kvm%s -accel tcg%s%s "
                                  "-name target,debug-threads=on "
                                  "-m %s "
                                  "-serial file:%s/dest_serial "
                                  "-incoming %s "
                                  "%s %s %s %s",
                                  args->use_dirty_ring ?
                                  ",dirty-ring-size=4096" : "",
                                  machine_opts ? " -machine " : "",
                                  machine_opts ? machine_opts : "",
                                  memory_size, tmpfs, uri,
                                  arch_target, shmem_opts,
                                  args->opts_target ? args->opts_target : "",
                                  ignore_stderr);
     *to = qtest_init(cmd_target);
 
     /*
      * Remove shmem file immediately to avoid memory leak in test failed case.
      * It's valid becase QEMU has already opened this file
      */
     if (args->use_shmem) {
         unlink(shmem_path);
     }
 
     return 0;
 }
 
 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 {
     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 
     qtest_quit(from);
 
     if (test_dest) {
         qtest_memread(to, start_address, &dest_byte_a, 1);
 
         /* Destination still running, wait for a byte to change */
         do {
             qtest_memread(to, start_address, &dest_byte_b, 1);
             usleep(1000 * 10);
         } while (dest_byte_a == dest_byte_b);
 
         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 
         /* With it stopped, check nothing changes */
         qtest_memread(to, start_address, &dest_byte_c, 1);
         usleep(1000 * 200);
         qtest_memread(to, start_address, &dest_byte_d, 1);
         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 
         check_guests_ram(to);
     }
 
     qtest_quit(to);
 
     cleanup("bootsect");
     cleanup("migsocket");
     cleanup("src_serial");
     cleanup("dest_serial");
 }
 
 #ifdef CONFIG_GNUTLS
 struct TestMigrateTLSPSKData {
     char *workdir;
     char *workdiralt;
     char *pskfile;
     char *pskfilealt;
 };
 
 static void *
 test_migrate_tls_psk_start_common(QTestState *from,
                                   QTestState *to,
                                   bool mismatch)
 {
     struct TestMigrateTLSPSKData *data =
         g_new0(struct TestMigrateTLSPSKData, 1);
     QDict *rsp;
 
     data->workdir = g_strdup_printf("%s/tlscredspsk0", tmpfs);
     data->pskfile = g_strdup_printf("%s/%s", data->workdir,
                                     QCRYPTO_TLS_CREDS_PSKFILE);
     g_mkdir_with_parents(data->workdir, 0700);
     test_tls_psk_init(data->pskfile);
 
     if (mismatch) {
         data->workdiralt = g_strdup_printf("%s/tlscredspskalt0", tmpfs);
         data->pskfilealt = g_strdup_printf("%s/%s", data->workdiralt,
                                            QCRYPTO_TLS_CREDS_PSKFILE);
         g_mkdir_with_parents(data->workdiralt, 0700);
         test_tls_psk_init_alt(data->pskfilealt);
     }
 
     rsp = wait_command(from,
                        "{ 'execute': 'object-add',"
                        "  'arguments': { 'qom-type': 'tls-creds-psk',"
                        "                 'id': 'tlscredspsk0',"
                        "                 'endpoint': 'client',"
                        "                 'dir': %s,"
                        "                 'username': 'qemu'} }",
                        data->workdir);
     qobject_unref(rsp);
 
     rsp = wait_command(to,
                        "{ 'execute': 'object-add',"
                        "  'arguments': { 'qom-type': 'tls-creds-psk',"
                        "                 'id': 'tlscredspsk0',"
                        "                 'endpoint': 'server',"
                        "                 'dir': %s } }",
                        mismatch ? data->workdiralt : data->workdir);
     qobject_unref(rsp);
 
     migrate_set_parameter_str(from, "tls-creds", "tlscredspsk0");
     migrate_set_parameter_str(to, "tls-creds", "tlscredspsk0");
 
     return data;
 }
 
 static void *
 test_migrate_tls_psk_start_match(QTestState *from,
                                  QTestState *to)
 {
     return test_migrate_tls_psk_start_common(from, to, false);
 }
 
 static void *
 test_migrate_tls_psk_start_mismatch(QTestState *from,
                                     QTestState *to)
 {
     return test_migrate_tls_psk_start_common(from, to, true);
 }
 
 static void
 test_migrate_tls_psk_finish(QTestState *from,
                             QTestState *to,
                             void *opaque)
 {
     struct TestMigrateTLSPSKData *data = opaque;
 
     test_tls_psk_cleanup(data->pskfile);
     if (data->pskfilealt) {
         test_tls_psk_cleanup(data->pskfilealt);
     }
     rmdir(data->workdir);
     if (data->workdiralt) {
         rmdir(data->workdiralt);
     }
 
     g_free(data->workdiralt);
     g_free(data->pskfilealt);
     g_free(data->workdir);
     g_free(data->pskfile);
     g_free(data);
 }
 
 #ifdef CONFIG_TASN1
 typedef struct {
     char *workdir;
     char *keyfile;
     char *cacert;
     char *servercert;
     char *serverkey;
     char *clientcert;
     char *clientkey;
 } TestMigrateTLSX509Data;
 
 typedef struct {
     bool verifyclient;
     bool clientcert;
     bool hostileclient;
     bool authzclient;
     const char *certhostname;
     const char *certipaddr;
 } TestMigrateTLSX509;
 
 static void *
 test_migrate_tls_x509_start_common(QTestState *from,
                                    QTestState *to,
                                    TestMigrateTLSX509 *args)
 {
     TestMigrateTLSX509Data *data = g_new0(TestMigrateTLSX509Data, 1);
     QDict *rsp;
 
     data->workdir = g_strdup_printf("%s/tlscredsx5090", tmpfs);
     data->keyfile = g_strdup_printf("%s/key.pem", data->workdir);
 
     data->cacert = g_strdup_printf("%s/ca-cert.pem", data->workdir);
     data->serverkey = g_strdup_printf("%s/server-key.pem", data->workdir);
     data->servercert = g_strdup_printf("%s/server-cert.pem", data->workdir);
     if (args->clientcert) {
         data->clientkey = g_strdup_printf("%s/client-key.pem", data->workdir);
         data->clientcert = g_strdup_printf("%s/client-cert.pem", data->workdir);
     }
 
     g_mkdir_with_parents(data->workdir, 0700);
 
     test_tls_init(data->keyfile);
 #ifndef _WIN32
     g_assert(link(data->keyfile, data->serverkey) == 0);
 #else
     g_assert(CreateHardLink(data->serverkey, data->keyfile, NULL) != 0);
 #endif
     if (args->clientcert) {
 #ifndef _WIN32
         g_assert(link(data->keyfile, data->clientkey) == 0);
 #else
         g_assert(CreateHardLink(data->clientkey, data->keyfile, NULL) != 0);
 #endif
     }
 
     TLS_ROOT_REQ_SIMPLE(cacertreq, data->cacert);
     if (args->clientcert) {
         TLS_CERT_REQ_SIMPLE_CLIENT(servercertreq, cacertreq,
                                    args->hostileclient ?
                                    QCRYPTO_TLS_TEST_CLIENT_HOSTILE_NAME :
                                    QCRYPTO_TLS_TEST_CLIENT_NAME,
                                    data->clientcert);
     }
 
     TLS_CERT_REQ_SIMPLE_SERVER(clientcertreq, cacertreq,
                                data->servercert,
                                args->certhostname,
                                args->certipaddr);
 
     rsp = wait_command(from,
                        "{ 'execute': 'object-add',"
                        "  'arguments': { 'qom-type': 'tls-creds-x509',"
                        "                 'id': 'tlscredsx509client0',"
                        "                 'endpoint': 'client',"
                        "                 'dir': %s,"
                        "                 'sanity-check': true,"
                        "                 'verify-peer': true} }",
                        data->workdir);
     qobject_unref(rsp);
     migrate_set_parameter_str(from, "tls-creds", "tlscredsx509client0");
     if (args->certhostname) {
         migrate_set_parameter_str(from, "tls-hostname", args->certhostname);
     }
 
     rsp = wait_command(to,
                        "{ 'execute': 'object-add',"
                        "  'arguments': { 'qom-type': 'tls-creds-x509',"
                        "                 'id': 'tlscredsx509server0',"
                        "                 'endpoint': 'server',"
                        "                 'dir': %s,"
                        "                 'sanity-check': true,"
                        "                 'verify-peer': %i} }",
                        data->workdir, args->verifyclient);
     qobject_unref(rsp);
     migrate_set_parameter_str(to, "tls-creds", "tlscredsx509server0");
 
     if (args->authzclient) {
         rsp = wait_command(to,
                            "{ 'execute': 'object-add',"
                            "  'arguments': { 'qom-type': 'authz-simple',"
                            "                 'id': 'tlsauthz0',"
                            "                 'identity': %s} }",
                            "CN=" QCRYPTO_TLS_TEST_CLIENT_NAME);
         migrate_set_parameter_str(to, "tls-authz", "tlsauthz0");
     }
 
     return data;
 }
 
 /*
  * The normal case: match server's cert hostname against
  * whatever host we were telling QEMU to connect to (if any)
  */
 static void *
 test_migrate_tls_x509_start_default_host(QTestState *from,
                                          QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .verifyclient = true,
         .clientcert = true,
         .certipaddr = "127.0.0.1"
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 /*
  * The unusual case: the server's cert is different from
  * the address we're telling QEMU to connect to (if any),
  * so we must give QEMU an explicit hostname to validate
  */
 static void *
 test_migrate_tls_x509_start_override_host(QTestState *from,
                                           QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .verifyclient = true,
         .clientcert = true,
         .certhostname = "qemu.org",
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 /*
  * The unusual case: the server's cert is different from
  * the address we're telling QEMU to connect to, and so we
  * expect the client to reject the server
  */
 static void *
 test_migrate_tls_x509_start_mismatch_host(QTestState *from,
                                           QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .verifyclient = true,
         .clientcert = true,
         .certipaddr = "10.0.0.1",
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 static void *
 test_migrate_tls_x509_start_friendly_client(QTestState *from,
                                             QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .verifyclient = true,
         .clientcert = true,
         .authzclient = true,
         .certipaddr = "127.0.0.1",
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 static void *
 test_migrate_tls_x509_start_hostile_client(QTestState *from,
                                            QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .verifyclient = true,
         .clientcert = true,
         .hostileclient = true,
         .authzclient = true,
         .certipaddr = "127.0.0.1",
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 /*
  * The case with no client certificate presented,
  * and no server verification
  */
 static void *
 test_migrate_tls_x509_start_allow_anon_client(QTestState *from,
                                               QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .certipaddr = "127.0.0.1",
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 /*
  * The case with no client certificate presented,
  * and server verification rejecting
  */
 static void *
 test_migrate_tls_x509_start_reject_anon_client(QTestState *from,
                                                QTestState *to)
 {
     TestMigrateTLSX509 args = {
         .verifyclient = true,
         .certipaddr = "127.0.0.1",
     };
     return test_migrate_tls_x509_start_common(from, to, &args);
 }
 
 static void
 test_migrate_tls_x509_finish(QTestState *from,
                              QTestState *to,
                              void *opaque)
 {
     TestMigrateTLSX509Data *data = opaque;
 
     test_tls_cleanup(data->keyfile);
     g_free(data->keyfile);
 
     unlink(data->cacert);
     g_free(data->cacert);
     unlink(data->servercert);
     g_free(data->servercert);
     unlink(data->serverkey);
     g_free(data->serverkey);
 
     if (data->clientcert) {
         unlink(data->clientcert);
         g_free(data->clientcert);
     }
     if (data->clientkey) {
         unlink(data->clientkey);
         g_free(data->clientkey);
     }
 
     rmdir(data->workdir);
     g_free(data->workdir);
 
     g_free(data);
 }
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
 static int migrate_postcopy_prepare(QTestState **from_ptr,
                                     QTestState **to_ptr,
                                     MigrateCommon *args)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     QTestState *from, *to;
 
     if (test_migrate_start(&from, &to, uri, &args->start)) {
         return -1;
     }
 
     if (args->start_hook) {
         args->postcopy_data = args->start_hook(from, to);
     }
 
     migrate_set_capability(from, "postcopy-ram", true);
     migrate_set_capability(to, "postcopy-ram", true);
     migrate_set_capability(to, "postcopy-blocktime", true);
 
     if (args->postcopy_preempt) {
         migrate_set_capability(from, "postcopy-preempt", true);
         migrate_set_capability(to, "postcopy-preempt", true);
     }
 
     migrate_ensure_non_converge(from);
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");
 
     migrate_qmp(from, uri, "{}");
 
     wait_for_migration_pass(from);
 
     *from_ptr = from;
     *to_ptr = to;
 
     return 0;
 }
 
 static void migrate_postcopy_complete(QTestState *from, QTestState *to,
                                       MigrateCommon *args)
 {
     wait_for_migration_complete(from);
 
     /* Make sure we get at least one "B" on destination */
     wait_for_serial("dest_serial");
 
     if (uffd_feature_thread_id) {
         read_blocktime(to);
     }
 
     if (args->finish_hook) {
         args->finish_hook(from, to, args->postcopy_data);
         args->postcopy_data = NULL;
     }
 
     test_migrate_end(from, to, true);
 }
 
 static void test_postcopy_common(MigrateCommon *args)
 {
     QTestState *from, *to;
 
     if (migrate_postcopy_prepare(&from, &to, args)) {
         return;
     }
     migrate_postcopy_start(from, to);
     migrate_postcopy_complete(from, to, args);
 }
 
 static void test_postcopy(void)
 {
     MigrateCommon args = { };
 
     test_postcopy_common(&args);
 }
 
 static void test_postcopy_preempt(void)
 {
     MigrateCommon args = {
         .postcopy_preempt = true,
     };
 
     test_postcopy_common(&args);
 }
 
 #ifdef CONFIG_GNUTLS
 static void test_postcopy_tls_psk(void)
 {
     MigrateCommon args = {
         .start_hook = test_migrate_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
 
     test_postcopy_common(&args);
 }
 
 static void test_postcopy_preempt_tls_psk(void)
 {
     MigrateCommon args = {
         .postcopy_preempt = true,
         .start_hook = test_migrate_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
 
     test_postcopy_common(&args);
 }
 #endif
 
 static void test_postcopy_recovery_common(MigrateCommon *args)
 {
     QTestState *from, *to;
     g_autofree char *uri = NULL;
 
     /* Always hide errors for postcopy recover tests since they're expected */
     args->start.hide_stderr = true;
 
     if (migrate_postcopy_prepare(&from, &to, args)) {
         return;
     }
 
     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 4096);
 
     /* Now we start the postcopy */
     migrate_postcopy_start(from, to);
 
     /*
      * Wait until postcopy is really started; we can only run the
      * migrate-pause command during a postcopy
      */
     wait_for_migration_status(from, "postcopy-active", NULL);
 
     /*
      * Manually stop the postcopy migration. This emulates a network
      * failure with the migration socket
      */
     migrate_pause(from);
 
     /*
      * Wait for destination side to reach postcopy-paused state.  The
      * migrate-recover command can only succeed if destination machine
      * is in the paused state
      */
     wait_for_migration_status(to, "postcopy-paused",
                               (const char * []) { "failed", "active",
                                                   "completed", NULL });
 
     /*
      * Create a new socket to emulate a new channel that is different
      * from the broken migration channel; tell the destination to
      * listen to the new port
      */
     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
     migrate_recover(to, uri);
 
     /*
      * Try to rebuild the migration channel using the resume flag and
      * the newly created channel
      */
     wait_for_migration_status(from, "postcopy-paused",
                               (const char * []) { "failed", "active",
                                                   "completed", NULL });
     migrate_qmp(from, uri, "{'resume': true}");
 
     /* Restore the postcopy bandwidth to unlimited */
     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 0);
 
     migrate_postcopy_complete(from, to, args);
 }
 
 static void test_postcopy_recovery(void)
 {
     MigrateCommon args = { };
 
     test_postcopy_recovery_common(&args);
 }
 
 #ifdef CONFIG_GNUTLS
 static void test_postcopy_recovery_tls_psk(void)
 {
     MigrateCommon args = {
         .start_hook = test_migrate_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
 
     test_postcopy_recovery_common(&args);
 }
 #endif
 
 static void test_postcopy_preempt_recovery(void)
 {
     MigrateCommon args = {
         .postcopy_preempt = true,
     };
 
     test_postcopy_recovery_common(&args);
 }
 
 #ifdef CONFIG_GNUTLS
 /* This contains preempt+recovery+tls test altogether */
 static void test_postcopy_preempt_all(void)
 {
     MigrateCommon args = {
         .postcopy_preempt = true,
         .start_hook = test_migrate_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
 
     test_postcopy_recovery_common(&args);
 }
 #endif
 
 static void test_baddest(void)
 {
     MigrateStart args = {
         .hide_stderr = true
     };
     QTestState *from, *to;
 
     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", &args)) {
         return;
     }
     migrate_qmp(from, "tcp:127.0.0.1:0", "{}");
     wait_for_migration_fail(from, false);
     test_migrate_end(from, to, false);
 }
 
 static void test_precopy_common(MigrateCommon *args)
 {
     QTestState *from, *to;
     void *data_hook = NULL;
 
     if (test_migrate_start(&from, &to, args->listen_uri, &args->start)) {
         return;
     }
 
     migrate_ensure_non_converge(from);
 
     if (args->start_hook) {
         data_hook = args->start_hook(from, to);
     }
 
     /* Wait for the first serial output from the source */
     if (args->result == MIG_TEST_SUCCEED) {
         wait_for_serial("src_serial");
     }
 
     if (!args->connect_uri) {
         g_autofree char *local_connect_uri =
             migrate_get_socket_address(to, "socket-address");
         migrate_qmp(from, local_connect_uri, "{}");
     } else {
         migrate_qmp(from, args->connect_uri, "{}");
     }
 
 
     if (args->result != MIG_TEST_SUCCEED) {
         bool allow_active = args->result == MIG_TEST_FAIL;
         wait_for_migration_fail(from, allow_active);
 
         if (args->result == MIG_TEST_FAIL_DEST_QUIT_ERR) {
             qtest_set_expected_status(to, EXIT_FAILURE);
         }
     } else {
         if (args->iterations) {
             while (args->iterations--) {
                 wait_for_migration_pass(from);
             }
         } else {
             wait_for_migration_pass(from);
         }
 
         migrate_ensure_converge(from);
 
         /* We do this first, as it has a timeout to stop us
          * hanging forever if migration didn't converge */
         wait_for_migration_complete(from);
 
         if (!got_stop) {
             qtest_qmp_eventwait(from, "STOP");
         }
 
         qtest_qmp_eventwait(to, "RESUME");
 
         wait_for_serial("dest_serial");
     }
 
     if (args->finish_hook) {
         args->finish_hook(from, to, data_hook);
     }
 
     test_migrate_end(from, to, args->result == MIG_TEST_SUCCEED);
 }
 
 static void test_precopy_unix_plain(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateCommon args = {
         .listen_uri = uri,
         .connect_uri = uri,
     };
 
     test_precopy_common(&args);
 }
 
 
 static void test_precopy_unix_dirty_ring(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateCommon args = {
         .start = {
             .use_dirty_ring = true,
         },
         .listen_uri = uri,
         .connect_uri = uri,
     };
 
     test_precopy_common(&args);
 }
 
 #ifdef CONFIG_GNUTLS
 static void test_precopy_unix_tls_psk(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateCommon args = {
         .connect_uri = uri,
         .listen_uri = uri,
         .start_hook = test_migrate_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
 
     test_precopy_common(&args);
 }
 
 #ifdef CONFIG_TASN1
 static void test_precopy_unix_tls_x509_default_host(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .connect_uri = uri,
         .listen_uri = uri,
         .start_hook = test_migrate_tls_x509_start_default_host,
         .finish_hook = test_migrate_tls_x509_finish,
         .result = MIG_TEST_FAIL_DEST_QUIT_ERR,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_unix_tls_x509_override_host(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateCommon args = {
         .connect_uri = uri,
         .listen_uri = uri,
         .start_hook = test_migrate_tls_x509_start_override_host,
         .finish_hook = test_migrate_tls_x509_finish,
     };
 
     test_precopy_common(&args);
 }
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
 #if 0
 /* Currently upset on aarch64 TCG */
 static void test_ignore_shared(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     QTestState *from, *to;
 
     if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) {
         return;
     }
 
     migrate_set_capability(from, "x-ignore-shared", true);
     migrate_set_capability(to, "x-ignore-shared", true);
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");
 
     migrate_qmp(from, uri, "{}");
 
     wait_for_migration_pass(from);
 
     if (!got_stop) {
         qtest_qmp_eventwait(from, "STOP");
     }
 
     qtest_qmp_eventwait(to, "RESUME");
 
     wait_for_serial("dest_serial");
     wait_for_migration_complete(from);
 
     /* Check whether shared RAM has been really skipped */
     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 
     test_migrate_end(from, to, true);
 }
 #endif
 
 static void *
 test_migrate_xbzrle_start(QTestState *from,
                           QTestState *to)
 {
     migrate_set_parameter_int(from, "xbzrle-cache-size", 33554432);
 
     migrate_set_capability(from, "xbzrle", true);
     migrate_set_capability(to, "xbzrle", true);
 
     return NULL;
 }
 
 static void test_precopy_unix_xbzrle(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateCommon args = {
         .connect_uri = uri,
         .listen_uri = uri,
 
         .start_hook = test_migrate_xbzrle_start,
 
         .iterations = 2,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_plain(void)
 {
     MigrateCommon args = {
         .listen_uri = "tcp:127.0.0.1:0",
     };
 
     test_precopy_common(&args);
 }
 
 #ifdef CONFIG_GNUTLS
 static void test_precopy_tcp_tls_psk_match(void)
 {
     MigrateCommon args = {
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_psk_mismatch(void)
 {
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_psk_start_mismatch,
         .finish_hook = test_migrate_tls_psk_finish,
         .result = MIG_TEST_FAIL,
     };
 
     test_precopy_common(&args);
 }
 
 #ifdef CONFIG_TASN1
 static void test_precopy_tcp_tls_x509_default_host(void)
 {
     MigrateCommon args = {
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_default_host,
         .finish_hook = test_migrate_tls_x509_finish,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_x509_override_host(void)
 {
     MigrateCommon args = {
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_override_host,
         .finish_hook = test_migrate_tls_x509_finish,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_x509_mismatch_host(void)
 {
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_mismatch_host,
         .finish_hook = test_migrate_tls_x509_finish,
         .result = MIG_TEST_FAIL_DEST_QUIT_ERR,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_x509_friendly_client(void)
 {
     MigrateCommon args = {
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_friendly_client,
         .finish_hook = test_migrate_tls_x509_finish,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_x509_hostile_client(void)
 {
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_hostile_client,
         .finish_hook = test_migrate_tls_x509_finish,
         .result = MIG_TEST_FAIL,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_x509_allow_anon_client(void)
 {
     MigrateCommon args = {
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_allow_anon_client,
         .finish_hook = test_migrate_tls_x509_finish,
     };
 
     test_precopy_common(&args);
 }
 
 static void test_precopy_tcp_tls_x509_reject_anon_client(void)
 {
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "tcp:127.0.0.1:0",
         .start_hook = test_migrate_tls_x509_start_reject_anon_client,
         .finish_hook = test_migrate_tls_x509_finish,
         .result = MIG_TEST_FAIL,
     };
 
     test_precopy_common(&args);
 }
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
 #ifndef _WIN32
 static void *test_migrate_fd_start_hook(QTestState *from,
                                         QTestState *to)
 {
     QDict *rsp;
     int ret;
     int pair[2];
 
     /* Create two connected sockets for migration */
     ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
     g_assert_cmpint(ret, ==, 0);
 
     /* Send the 1st socket to the target */
     rsp = wait_command_fd(to, pair[0],
                           "{ 'execute': 'getfd',"
                           "  'arguments': { 'fdname': 'fd-mig' }}");
     qobject_unref(rsp);
     close(pair[0]);
 
     /* Start incoming migration from the 1st socket */
     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
                            "  'arguments': { 'uri': 'fd:fd-mig' }}");
     qobject_unref(rsp);
 
     /* Send the 2nd socket to the target */
     rsp = wait_command_fd(from, pair[1],
                           "{ 'execute': 'getfd',"
                           "  'arguments': { 'fdname': 'fd-mig' }}");
     qobject_unref(rsp);
     close(pair[1]);
 
     return NULL;
 }
 
 static void test_migrate_fd_finish_hook(QTestState *from,
                                         QTestState *to,
                                         void *opaque)
 {
     QDict *rsp;
     const char *error_desc;
 
     /* Test closing fds */
     /* We assume, that QEMU removes named fd from its list,
      * so this should fail */
     rsp = qtest_qmp(from, "{ 'execute': 'closefd',"
                           "  'arguments': { 'fdname': 'fd-mig' }}");
     g_assert_true(qdict_haskey(rsp, "error"));
     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
     qobject_unref(rsp);
 
     rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
                         "  'arguments': { 'fdname': 'fd-mig' }}");
     g_assert_true(qdict_haskey(rsp, "error"));
     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
     qobject_unref(rsp);
 }
 
 static void test_migrate_fd_proto(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .connect_uri = "fd:fd-mig",
         .start_hook = test_migrate_fd_start_hook,
         .finish_hook = test_migrate_fd_finish_hook
     };
     test_precopy_common(&args);
 }
 #endif /* _WIN32 */
 
 static void do_test_validate_uuid(MigrateStart *args, bool should_fail)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     QTestState *from, *to;
 
     if (test_migrate_start(&from, &to, uri, args)) {
         return;
     }
 
     /*
      * UUID validation is at the begin of migration. So, the main process of
      * migration is not interesting for us here. Thus, set huge downtime for
      * very fast migration.
      */
     migrate_set_parameter_int(from, "downtime-limit", 1000000);
     migrate_set_capability(from, "validate-uuid", true);
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");
 
     migrate_qmp(from, uri, "{}");
 
     if (should_fail) {
         qtest_set_expected_status(to, EXIT_FAILURE);
         wait_for_migration_fail(from, true);
     } else {
         wait_for_migration_complete(from);
     }
 
     test_migrate_end(from, to, false);
 }
 
 static void test_validate_uuid(void)
 {
     MigrateStart args = {
         .opts_source = "-uuid 11111111-1111-1111-1111-111111111111",
         .opts_target = "-uuid 11111111-1111-1111-1111-111111111111",
     };
 
     do_test_validate_uuid(&args, false);
 }
 
 static void test_validate_uuid_error(void)
 {
     MigrateStart args = {
         .opts_source = "-uuid 11111111-1111-1111-1111-111111111111",
         .opts_target = "-uuid 22222222-2222-2222-2222-222222222222",
         .hide_stderr = true,
     };
 
     do_test_validate_uuid(&args, true);
 }
 
 static void test_validate_uuid_src_not_set(void)
 {
     MigrateStart args = {
         .opts_target = "-uuid 22222222-2222-2222-2222-222222222222",
         .hide_stderr = true,
     };
 
     do_test_validate_uuid(&args, false);
 }
 
 static void test_validate_uuid_dst_not_set(void)
 {
     MigrateStart args = {
         .opts_source = "-uuid 11111111-1111-1111-1111-111111111111",
         .hide_stderr = true,
     };
 
     do_test_validate_uuid(&args, false);
 }
 
 static void test_migrate_auto_converge(void)
 {
     g_autofree char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
     MigrateStart args = {};
     QTestState *from, *to;
     int64_t percentage;
 
     /*
      * We want the test to be stable and as fast as possible.
      * E.g., with 1Gb/s bandwith migration may pass without throttling,
      * so we need to decrease a bandwidth.
      */
     const int64_t init_pct = 5, inc_pct = 50, max_pct = 95;
 
     if (test_migrate_start(&from, &to, uri, &args)) {
         return;
     }
 
     migrate_set_capability(from, "auto-converge", true);
     migrate_set_parameter_int(from, "cpu-throttle-initial", init_pct);
     migrate_set_parameter_int(from, "cpu-throttle-increment", inc_pct);
     migrate_set_parameter_int(from, "max-cpu-throttle", max_pct);
 
     /*
      * Set the initial parameters so that the migration could not converge
      * without throttling.
      */
     migrate_ensure_non_converge(from);
 
     /* To check remaining size after precopy */
     migrate_set_capability(from, "pause-before-switchover", true);
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");
 
     migrate_qmp(from, uri, "{}");
 
     /* Wait for throttling begins */
     percentage = 0;
     while (percentage == 0) {
         percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
         usleep(100);
         g_assert_false(got_stop);
     }
     /* The first percentage of throttling should be equal to init_pct */
     g_assert_cmpint(percentage, ==, init_pct);
     /* Now, when we tested that throttling works, let it converge */
     migrate_ensure_converge(from);
 
     /*
      * Wait for pre-switchover status to check last throttle percentage
      * and remaining. These values will be zeroed later
      */
     wait_for_migration_status(from, "pre-switchover", NULL);
 
     /* The final percentage of throttling shouldn't be greater than max_pct */
     percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
     g_assert_cmpint(percentage, <=, max_pct);
     migrate_continue(from, "pre-switchover");
 
     qtest_qmp_eventwait(to, "RESUME");
 
     wait_for_serial("dest_serial");
     wait_for_migration_complete(from);
 
     test_migrate_end(from, to, true);
 }
 
 static void *
 test_migrate_precopy_tcp_multifd_start_common(QTestState *from,
                                               QTestState *to,
                                               const char *method)
 {
     QDict *rsp;
 
     migrate_set_parameter_int(from, "multifd-channels", 16);
     migrate_set_parameter_int(to, "multifd-channels", 16);
 
     migrate_set_parameter_str(from, "multifd-compression", method);
     migrate_set_parameter_str(to, "multifd-compression", method);
 
     migrate_set_capability(from, "multifd", true);
     migrate_set_capability(to, "multifd", true);
 
     /* Start incoming migration from the 1st socket */
     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
                            "  'arguments': { 'uri': 'tcp:127.0.0.1:0' }}");
     qobject_unref(rsp);
 
     return NULL;
 }
 
 static void *
 test_migrate_precopy_tcp_multifd_start(QTestState *from,
                                        QTestState *to)
 {
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
 }
 
 static void *
 test_migrate_precopy_tcp_multifd_zlib_start(QTestState *from,
                                             QTestState *to)
 {
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "zlib");
 }
 
 #ifdef CONFIG_ZSTD
 static void *
 test_migrate_precopy_tcp_multifd_zstd_start(QTestState *from,
                                             QTestState *to)
 {
     return test_migrate_precopy_tcp_multifd_start_common(from, to, "zstd");
 }
 #endif /* CONFIG_ZSTD */
 
 static void test_multifd_tcp_none(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_precopy_tcp_multifd_start,
     };
     test_precopy_common(&args);
 }
 
 static void test_multifd_tcp_zlib(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_precopy_tcp_multifd_zlib_start,
     };
     test_precopy_common(&args);
 }
 
 #ifdef CONFIG_ZSTD
 static void test_multifd_tcp_zstd(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_precopy_tcp_multifd_zstd_start,
     };
     test_precopy_common(&args);
 }
 #endif
 
 #ifdef CONFIG_GNUTLS
 static void *
 test_migrate_multifd_tcp_tls_psk_start_match(QTestState *from,
                                              QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_psk_start_match(from, to);
 }
 
 static void *
 test_migrate_multifd_tcp_tls_psk_start_mismatch(QTestState *from,
                                                 QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_psk_start_mismatch(from, to);
 }
 
 #ifdef CONFIG_TASN1
 static void *
 test_migrate_multifd_tls_x509_start_default_host(QTestState *from,
                                                  QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_x509_start_default_host(from, to);
 }
 
 static void *
 test_migrate_multifd_tls_x509_start_override_host(QTestState *from,
                                                   QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_x509_start_override_host(from, to);
 }
 
 static void *
 test_migrate_multifd_tls_x509_start_mismatch_host(QTestState *from,
                                                   QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_x509_start_mismatch_host(from, to);
 }
 
 static void *
 test_migrate_multifd_tls_x509_start_allow_anon_client(QTestState *from,
                                                       QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_x509_start_allow_anon_client(from, to);
 }
 
 static void *
 test_migrate_multifd_tls_x509_start_reject_anon_client(QTestState *from,
                                                        QTestState *to)
 {
     test_migrate_precopy_tcp_multifd_start_common(from, to, "none");
     return test_migrate_tls_x509_start_reject_anon_client(from, to);
 }
 #endif /* CONFIG_TASN1 */
 
 static void test_multifd_tcp_tls_psk_match(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tcp_tls_psk_start_match,
         .finish_hook = test_migrate_tls_psk_finish,
     };
     test_precopy_common(&args);
 }
 
 static void test_multifd_tcp_tls_psk_mismatch(void)
 {
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tcp_tls_psk_start_mismatch,
         .finish_hook = test_migrate_tls_psk_finish,
         .result = MIG_TEST_FAIL,
     };
     test_precopy_common(&args);
 }
 
 #ifdef CONFIG_TASN1
 static void test_multifd_tcp_tls_x509_default_host(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tls_x509_start_default_host,
         .finish_hook = test_migrate_tls_x509_finish,
     };
     test_precopy_common(&args);
 }
 
 static void test_multifd_tcp_tls_x509_override_host(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tls_x509_start_override_host,
         .finish_hook = test_migrate_tls_x509_finish,
     };
     test_precopy_common(&args);
 }
 
 static void test_multifd_tcp_tls_x509_mismatch_host(void)
 {
     /*
      * This has different behaviour to the non-multifd case.
      *
      * In non-multifd case when client aborts due to mismatched
      * cert host, the server has already started trying to load
      * migration state, and so it exits with I/O failure.
      *
      * In multifd case when client aborts due to mismatched
      * cert host, the server is still waiting for the other
      * multifd connections to arrive so hasn't started trying
      * to load migration state, and thus just aborts the migration
      * without exiting.
      */
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tls_x509_start_mismatch_host,
         .finish_hook = test_migrate_tls_x509_finish,
         .result = MIG_TEST_FAIL,
     };
     test_precopy_common(&args);
 }
 
 static void test_multifd_tcp_tls_x509_allow_anon_client(void)
 {
     MigrateCommon args = {
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tls_x509_start_allow_anon_client,
         .finish_hook = test_migrate_tls_x509_finish,
     };
     test_precopy_common(&args);
 }
 
 static void test_multifd_tcp_tls_x509_reject_anon_client(void)
 {
     MigrateCommon args = {
         .start = {
             .hide_stderr = true,
         },
         .listen_uri = "defer",
         .start_hook = test_migrate_multifd_tls_x509_start_reject_anon_client,
         .finish_hook = test_migrate_tls_x509_finish,
         .result = MIG_TEST_FAIL,
     };
     test_precopy_common(&args);
 }
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
 /*
  * This test does:
  *  source               target
  *                       migrate_incoming
  *     migrate
  *     migrate_cancel
  *                       launch another target
  *     migrate
  *
  *  And see that it works
  */
 static void test_multifd_tcp_cancel(void)
 {
     MigrateStart args = {
         .hide_stderr = true,
     };
     QTestState *from, *to, *to2;
     QDict *rsp;
     g_autofree char *uri = NULL;
 
     if (test_migrate_start(&from, &to, "defer", &args)) {
         return;
     }
 
     migrate_ensure_non_converge(from);
 
     migrate_set_parameter_int(from, "multifd-channels", 16);
     migrate_set_parameter_int(to, "multifd-channels", 16);
 
     migrate_set_capability(from, "multifd", true);
     migrate_set_capability(to, "multifd", true);
 
     /* Start incoming migration from the 1st socket */
     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
                            "  'arguments': { 'uri': 'tcp:127.0.0.1:0' }}");
     qobject_unref(rsp);
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");
 
     uri = migrate_get_socket_address(to, "socket-address");
 
     migrate_qmp(from, uri, "{}");
 
     wait_for_migration_pass(from);
 
     migrate_cancel(from);
 
     /* Make sure QEMU process "to" exited */
     qtest_set_expected_status(to, EXIT_FAILURE);
     qtest_wait_qemu(to);
 
     args = (MigrateStart){
         .only_target = true,
     };
 
     if (test_migrate_start(&from, &to2, "defer", &args)) {
         return;
     }
 
     migrate_set_parameter_int(to2, "multifd-channels", 16);
 
     migrate_set_capability(to2, "multifd", true);
 
     /* Start incoming migration from the 1st socket */
     rsp = wait_command(to2, "{ 'execute': 'migrate-incoming',"
                             "  'arguments': { 'uri': 'tcp:127.0.0.1:0' }}");
     qobject_unref(rsp);
 
     g_free(uri);
     uri = migrate_get_socket_address(to2, "socket-address");
 
     wait_for_migration_status(from, "cancelled", NULL);
 
     migrate_ensure_converge(from);
 
     migrate_qmp(from, uri, "{}");
 
     wait_for_migration_pass(from);
 
     if (!got_stop) {
         qtest_qmp_eventwait(from, "STOP");
     }
     qtest_qmp_eventwait(to2, "RESUME");
 
     wait_for_serial("dest_serial");
     wait_for_migration_complete(from);
     test_migrate_end(from, to2, true);
 }
 
 static void calc_dirty_rate(QTestState *who, uint64_t calc_time)
 {
     qobject_unref(qmp_command(who,
                   "{ 'execute': 'calc-dirty-rate',"
                   "'arguments': { "
                   "'calc-time': %" PRIu64 ","
                   "'mode': 'dirty-ring' }}",
                   calc_time));
 }
 
 static QDict *query_dirty_rate(QTestState *who)
 {
     return qmp_command(who, "{ 'execute': 'query-dirty-rate' }");
 }
 
 static void dirtylimit_set_all(QTestState *who, uint64_t dirtyrate)
 {
     qobject_unref(qmp_command(who,
                   "{ 'execute': 'set-vcpu-dirty-limit',"
                   "'arguments': { "
                   "'dirty-rate': %" PRIu64 " } }",
                   dirtyrate));
 }
 
 static void cancel_vcpu_dirty_limit(QTestState *who)
 {
     qobject_unref(qmp_command(who,
                   "{ 'execute': 'cancel-vcpu-dirty-limit' }"));
 }
 
 static QDict *query_vcpu_dirty_limit(QTestState *who)
 {
     QDict *rsp;
 
     rsp = qtest_qmp(who, "{ 'execute': 'query-vcpu-dirty-limit' }");
     g_assert(!qdict_haskey(rsp, "error"));
     g_assert(qdict_haskey(rsp, "return"));
 
     return rsp;
 }
 
 static bool calc_dirtyrate_ready(QTestState *who)
 {
     QDict *rsp_return;
     gchar *status;
 
     rsp_return = query_dirty_rate(who);
     g_assert(rsp_return);
 
     status = g_strdup(qdict_get_str(rsp_return, "status"));
     g_assert(status);
 
     return g_strcmp0(status, "measuring");
 }
 
 static void wait_for_calc_dirtyrate_complete(QTestState *who,
                                              int64_t time_s)
 {
     int max_try_count = 10000;
     usleep(time_s * 1000000);
 
     while (!calc_dirtyrate_ready(who) && max_try_count--) {
         usleep(1000);
     }
 
     /*
      * Set the timeout with 10 s(max_try_count * 1000us),
      * if dirtyrate measurement not complete, fail test.
      */
     g_assert_cmpint(max_try_count, !=, 0);
 }
 
 static int64_t get_dirty_rate(QTestState *who)
 {
     QDict *rsp_return;
     gchar *status;
     QList *rates;
     const QListEntry *entry;
     QDict *rate;
     int64_t dirtyrate;
 
     rsp_return = query_dirty_rate(who);
     g_assert(rsp_return);
 
     status = g_strdup(qdict_get_str(rsp_return, "status"));
     g_assert(status);
     g_assert_cmpstr(status, ==, "measured");
 
     rates = qdict_get_qlist(rsp_return, "vcpu-dirty-rate");
     g_assert(rates && !qlist_empty(rates));
 
     entry = qlist_first(rates);
     g_assert(entry);
 
     rate = qobject_to(QDict, qlist_entry_obj(entry));
     g_assert(rate);
 
     dirtyrate = qdict_get_try_int(rate, "dirty-rate", -1);
 
     qobject_unref(rsp_return);
     return dirtyrate;
 }
 
 static int64_t get_limit_rate(QTestState *who)
 {
     QDict *rsp_return;
     QList *rates;
     const QListEntry *entry;
     QDict *rate;
     int64_t dirtyrate;
 
     rsp_return = query_vcpu_dirty_limit(who);
     g_assert(rsp_return);
 
     rates = qdict_get_qlist(rsp_return, "return");
     g_assert(rates && !qlist_empty(rates));
 
     entry = qlist_first(rates);
     g_assert(entry);
 
     rate = qobject_to(QDict, qlist_entry_obj(entry));
     g_assert(rate);
 
     dirtyrate = qdict_get_try_int(rate, "limit-rate", -1);
 
     qobject_unref(rsp_return);
     return dirtyrate;
 }
 
 static QTestState *dirtylimit_start_vm(void)
 {
     QTestState *vm = NULL;
     g_autofree gchar *cmd = NULL;
     const char *arch = qtest_get_arch();
     g_autofree char *bootpath = NULL;
 
     assert((strcmp(arch, "x86_64") == 0));
     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
     assert(sizeof(x86_bootsect) == 512);
     init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
 
     cmd = g_strdup_printf("-accel kvm,dirty-ring-size=4096 "
                           "-name dirtylimit-test,debug-threads=on "
                           "-m 150M -smp 1 "
                           "-serial file:%s/vm_serial "
                           "-drive file=%s,format=raw ",
                           tmpfs, bootpath);
 
     vm = qtest_init(cmd);
     return vm;
 }
 
 static void dirtylimit_stop_vm(QTestState *vm)
 {
     qtest_quit(vm);
     cleanup("bootsect");
     cleanup("vm_serial");
 }
 
 static void test_vcpu_dirty_limit(void)
 {
     QTestState *vm;
     int64_t origin_rate;
     int64_t quota_rate;
     int64_t rate ;
     int max_try_count = 20;
     int hit = 0;
 
     /* Start vm for vcpu dirtylimit test */
     vm = dirtylimit_start_vm();
 
     /* Wait for the first serial output from the vm*/
     wait_for_serial("vm_serial");
 
     /* Do dirtyrate measurement with calc time equals 1s */
     calc_dirty_rate(vm, 1);
 
     /* Sleep calc time and wait for calc dirtyrate complete */
     wait_for_calc_dirtyrate_complete(vm, 1);
 
     /* Query original dirty page rate */
     origin_rate = get_dirty_rate(vm);
 
     /* VM booted from bootsect should dirty memory steadily */
     assert(origin_rate != 0);
 
     /* Setup quota dirty page rate at half of origin */
     quota_rate = origin_rate / 2;
 
     /* Set dirtylimit */
     dirtylimit_set_all(vm, quota_rate);
 
     /*
      * Check if set-vcpu-dirty-limit and query-vcpu-dirty-limit
      * works literally
      */
     g_assert_cmpint(quota_rate, ==, get_limit_rate(vm));
 
     /* Sleep a bit to check if it take effect */
     usleep(2000000);
 
     /*
      * Check if dirtylimit take effect realistically, set the
      * timeout with 20 s(max_try_count * 1s), if dirtylimit
      * doesn't take effect, fail test.
      */
     while (--max_try_count) {
         calc_dirty_rate(vm, 1);
         wait_for_calc_dirtyrate_complete(vm, 1);
         rate = get_dirty_rate(vm);
 
         /*
          * Assume hitting if current rate is less
          * than quota rate (within accepting error)
          */
         if (rate < (quota_rate + DIRTYLIMIT_TOLERANCE_RANGE)) {
             hit = 1;
             break;
         }
     }
 
     g_assert_cmpint(hit, ==, 1);
 
     hit = 0;
     max_try_count = 20;
 
     /* Check if dirtylimit cancellation take effect */
     cancel_vcpu_dirty_limit(vm);
     while (--max_try_count) {
         calc_dirty_rate(vm, 1);
         wait_for_calc_dirtyrate_complete(vm, 1);
         rate = get_dirty_rate(vm);
 
         /*
          * Assume dirtylimit be canceled if current rate is
          * greater than quota rate (within accepting error)
          */
         if (rate > (quota_rate + DIRTYLIMIT_TOLERANCE_RANGE)) {
             hit = 1;
             break;
         }
     }
 
     g_assert_cmpint(hit, ==, 1);
     dirtylimit_stop_vm(vm);
 }
 
 static bool kvm_dirty_ring_supported(void)
 {
 #if defined(__linux__) && defined(HOST_X86_64)
     int ret, kvm_fd = open("/dev/kvm", O_RDONLY);
 
     if (kvm_fd < 0) {
         return false;
     }
 
     ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, KVM_CAP_DIRTY_LOG_RING);
     close(kvm_fd);
 
     /* We test with 4096 slots */
     if (ret < 4096) {
         return false;
     }
 
     return true;
 #else
     return false;
 #endif
 }
 
 int main(int argc, char **argv)
 {
     const bool has_kvm = qtest_has_accel("kvm");
     const bool has_uffd = ufd_version_check();
     const char *arch = qtest_get_arch();
     g_autoptr(GError) err = NULL;
     int ret;
 
     g_test_init(&argc, &argv, NULL);
 
     /*
      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
      * is touchy due to race conditions on dirty bits (especially on PPC for
      * some reason)
      */
     if (g_str_equal(arch, "ppc64") &&
         (!has_kvm || access("/sys/module/kvm_hv", F_OK))) {
         g_test_message("Skipping test: kvm_hv not available");
         return g_test_run();
     }
 
     /*
      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
      * there until the problems are resolved
      */
     if (g_str_equal(arch, "s390x") && !has_kvm) {
         g_test_message("Skipping test: s390x host with KVM is required");
         return g_test_run();
     }
 
     tmpfs = g_dir_make_tmp("migration-test-XXXXXX", &err);
     if (!tmpfs) {
         g_test_message("Can't create temporary directory in %s: %s",
                        g_get_tmp_dir(), err->message);
     }
     g_assert(tmpfs);
 
     module_call_init(MODULE_INIT_QOM);
 
     if (has_uffd) {
         qtest_add_func("/migration/postcopy/plain", test_postcopy);
         qtest_add_func("/migration/postcopy/recovery/plain",
                        test_postcopy_recovery);
         qtest_add_func("/migration/postcopy/preempt/plain", test_postcopy_preempt);
         qtest_add_func("/migration/postcopy/preempt/recovery/plain",
                        test_postcopy_preempt_recovery);
     }
 
     qtest_add_func("/migration/bad_dest", test_baddest);
     qtest_add_func("/migration/precopy/unix/plain", test_precopy_unix_plain);
     qtest_add_func("/migration/precopy/unix/xbzrle", test_precopy_unix_xbzrle);
 #ifdef CONFIG_GNUTLS
     qtest_add_func("/migration/precopy/unix/tls/psk",
                    test_precopy_unix_tls_psk);
 
     if (has_uffd) {
         /*
          * NOTE: psk test is enough for postcopy, as other types of TLS
          * channels are tested under precopy.  Here what we want to test is the
          * general postcopy path that has TLS channel enabled.
          */
         qtest_add_func("/migration/postcopy/tls/psk", test_postcopy_tls_psk);
         qtest_add_func("/migration/postcopy/recovery/tls/psk",
                        test_postcopy_recovery_tls_psk);
         qtest_add_func("/migration/postcopy/preempt/tls/psk",
                        test_postcopy_preempt_tls_psk);
         qtest_add_func("/migration/postcopy/preempt/recovery/tls/psk",
                        test_postcopy_preempt_all);
     }
 #ifdef CONFIG_TASN1
     qtest_add_func("/migration/precopy/unix/tls/x509/default-host",
                    test_precopy_unix_tls_x509_default_host);
     qtest_add_func("/migration/precopy/unix/tls/x509/override-host",
                    test_precopy_unix_tls_x509_override_host);
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
     qtest_add_func("/migration/precopy/tcp/plain", test_precopy_tcp_plain);
 #ifdef CONFIG_GNUTLS
     qtest_add_func("/migration/precopy/tcp/tls/psk/match",
                    test_precopy_tcp_tls_psk_match);
     qtest_add_func("/migration/precopy/tcp/tls/psk/mismatch",
                    test_precopy_tcp_tls_psk_mismatch);
 #ifdef CONFIG_TASN1
     qtest_add_func("/migration/precopy/tcp/tls/x509/default-host",
                    test_precopy_tcp_tls_x509_default_host);
     qtest_add_func("/migration/precopy/tcp/tls/x509/override-host",
                    test_precopy_tcp_tls_x509_override_host);
     qtest_add_func("/migration/precopy/tcp/tls/x509/mismatch-host",
                    test_precopy_tcp_tls_x509_mismatch_host);
     qtest_add_func("/migration/precopy/tcp/tls/x509/friendly-client",
                    test_precopy_tcp_tls_x509_friendly_client);
     qtest_add_func("/migration/precopy/tcp/tls/x509/hostile-client",
                    test_precopy_tcp_tls_x509_hostile_client);
     qtest_add_func("/migration/precopy/tcp/tls/x509/allow-anon-client",
                    test_precopy_tcp_tls_x509_allow_anon_client);
     qtest_add_func("/migration/precopy/tcp/tls/x509/reject-anon-client",
                    test_precopy_tcp_tls_x509_reject_anon_client);
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
 #ifndef _WIN32
     qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
 #endif
     qtest_add_func("/migration/validate_uuid", test_validate_uuid);
     qtest_add_func("/migration/validate_uuid_error", test_validate_uuid_error);
     qtest_add_func("/migration/validate_uuid_src_not_set",
                    test_validate_uuid_src_not_set);
     qtest_add_func("/migration/validate_uuid_dst_not_set",
                    test_validate_uuid_dst_not_set);
 
     qtest_add_func("/migration/auto_converge", test_migrate_auto_converge);
     qtest_add_func("/migration/multifd/tcp/plain/none",
                    test_multifd_tcp_none);
     qtest_add_func("/migration/multifd/tcp/plain/cancel",
                    test_multifd_tcp_cancel);
     qtest_add_func("/migration/multifd/tcp/plain/zlib",
                    test_multifd_tcp_zlib);
 #ifdef CONFIG_ZSTD
     qtest_add_func("/migration/multifd/tcp/plain/zstd",
                    test_multifd_tcp_zstd);
 #endif
 #ifdef CONFIG_GNUTLS
     qtest_add_func("/migration/multifd/tcp/tls/psk/match",
                    test_multifd_tcp_tls_psk_match);
     qtest_add_func("/migration/multifd/tcp/tls/psk/mismatch",
                    test_multifd_tcp_tls_psk_mismatch);
 #ifdef CONFIG_TASN1
     qtest_add_func("/migration/multifd/tcp/tls/x509/default-host",
                    test_multifd_tcp_tls_x509_default_host);
     qtest_add_func("/migration/multifd/tcp/tls/x509/override-host",
                    test_multifd_tcp_tls_x509_override_host);
     qtest_add_func("/migration/multifd/tcp/tls/x509/mismatch-host",
                    test_multifd_tcp_tls_x509_mismatch_host);
     qtest_add_func("/migration/multifd/tcp/tls/x509/allow-anon-client",
                    test_multifd_tcp_tls_x509_allow_anon_client);
     qtest_add_func("/migration/multifd/tcp/tls/x509/reject-anon-client",
                    test_multifd_tcp_tls_x509_reject_anon_client);
 #endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
     if (g_str_equal(arch, "x86_64") && has_kvm && kvm_dirty_ring_supported()) {
         qtest_add_func("/migration/dirty_ring",
                        test_precopy_unix_dirty_ring);
         qtest_add_func("/migration/vcpu_dirty_limit",
                        test_vcpu_dirty_limit);
     }
 
     ret = g_test_run();
 
     g_assert_cmpint(ret, ==, 0);
 
     ret = rmdir(tmpfs);
     if (ret != 0) {
         g_test_message("unable to rmdir: path (%s): %s",
                        tmpfs, strerror(errno));
     }
     g_free(tmpfs);
 
     return ret;
 }