Merge tag 'migration-20231017-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (20231017)

Hi

Same that yesterday one, except:
- rebased to latest (clean rebase)
- fixed 64 bits read on big endian host

CI: https://gitlab.com/juan.quintela/qemu/-/pipelines/1039214198

Please, apply.

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# gpg: Signature made Tue 17 Oct 2023 04:29:25 EDT
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [full]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [full]
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20231017-pull-request' of https://gitlab.com/juan.quintela/qemu: (38 commits)
  migration/multifd: Clarify Error usage in multifd_channel_connect
  migration/multifd: Unify multifd_send_thread error paths
  migration/multifd: Remove direct "socket" references
  migration/ram: Merge save_zero_page functions
  migration/ram: Move xbzrle zero page handling into save_zero_page
  migration/ram: Stop passing QEMUFile around in save_zero_page
  migration/ram: Remove RAMState from xbzrle_cache_zero_page
  migration/ram: Refactor precopy ram loading code
  multifd: reset next_packet_len after sending pages
  multifd: fix counters in multifd_send_thread
  migration: check for rate_limit_max for RATE_LIMIT_DISABLED
  migration: Improve json and formatting
  migration/rdma: Remove all "ret" variables that are used only once
  migration/rdma: Declare for index variables local
  migration/rdma: Use i as for index instead of idx
  migration/rdma: Check sooner if we are in postcopy for save_page()
  migration/rdma: Remove qemu_ prefix from exported functions
  migration/rdma: Move rdma constants from qemu-file.h to rdma.h
  qemu-file: Remove QEMUFileHooks
  migration/rdma: Create rdma_control_save_page()
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 207 insertions, 0 deletions

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 8eb2053dbb..e1c110537b 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -66,6 +66,12 @@ static bool got_dst_resume;
  */
 #define DIRTYLIMIT_TOLERANCE_RANGE  25  /* MB/s */
 
+#define ANALYZE_SCRIPT "scripts/analyze-migration.py"
+
+#define QEMU_VM_FILE_MAGIC 0x5145564d
+#define FILE_TEST_FILENAME "migfile"
+#define FILE_TEST_OFFSET 0x1000
+
 #if defined(__linux__)
 #include <sys/syscall.h>
 #include <sys/vfs.h>
@@ -882,6 +888,7 @@ static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
     cleanup("migsocket");
     cleanup("src_serial");
     cleanup("dest_serial");
+    cleanup(FILE_TEST_FILENAME);
 }
 
 #ifdef CONFIG_GNUTLS
@@ -1501,6 +1508,61 @@ static void test_baddest(void)
     test_migrate_end(from, to, false);
 }
 
+#ifndef _WIN32
+static void test_analyze_script(void)
+{
+    MigrateStart args = {
+        .opts_source = "-uuid 11111111-1111-1111-1111-111111111111",
+    };
+    QTestState *from, *to;
+    g_autofree char *uri = NULL;
+    g_autofree char *file = NULL;
+    int pid, wstatus;
+    const char *python = g_getenv("PYTHON");
+
+    if (!python) {
+        g_test_skip("PYTHON variable not set");
+        return;
+    }
+
+    /* dummy url */
+    if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", &args)) {
+        return;
+    }
+
+    /*
+     * Setting these two capabilities causes the "configuration"
+     * vmstate to include subsections for them. The script needs to
+     * parse those subsections properly.
+     */
+    migrate_set_capability(from, "validate-uuid", true);
+    migrate_set_capability(from, "x-ignore-shared", true);
+
+    file = g_strdup_printf("%s/migfile", tmpfs);
+    uri = g_strdup_printf("exec:cat > %s", file);
+
+    migrate_ensure_converge(from);
+    migrate_qmp(from, uri, "{}");
+    wait_for_migration_complete(from);
+
+    pid = fork();
+    if (!pid) {
+        close(1);
+        open("/dev/null", O_WRONLY);
+        execl(python, python, ANALYZE_SCRIPT, "-f", file, NULL);
+        g_assert_not_reached();
+    }
+
+    g_assert(waitpid(pid, &wstatus, 0) == pid);
+    if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != 0) {
+        g_test_message("Failed to analyze the migration stream");
+        g_test_fail();
+    }
+    test_migrate_end(from, to, false);
+    cleanup("migfile");
+}
+#endif
+
 static void test_precopy_common(MigrateCommon *args)
 {
     QTestState *from, *to;
@@ -1610,6 +1672,70 @@ finish:
     test_migrate_end(from, to, args->result == MIG_TEST_SUCCEED);
 }
 
+static void test_file_common(MigrateCommon *args, bool stop_src)
+{
+    QTestState *from, *to;
+    void *data_hook = NULL;
+    g_autofree char *connect_uri = g_strdup(args->connect_uri);
+
+    if (test_migrate_start(&from, &to, args->listen_uri, &args->start)) {
+        return;
+    }
+
+    /*
+     * File migration is never live. We can keep the source VM running
+     * during migration, but the destination will not be running
+     * concurrently.
+     */
+    g_assert_false(args->live);
+
+    if (args->start_hook) {
+        data_hook = args->start_hook(from, to);
+    }
+
+    migrate_ensure_converge(from);
+    wait_for_serial("src_serial");
+
+    if (stop_src) {
+        qtest_qmp_assert_success(from, "{ 'execute' : 'stop'}");
+        if (!got_src_stop) {
+            qtest_qmp_eventwait(from, "STOP");
+        }
+    }
+
+    if (args->result == MIG_TEST_QMP_ERROR) {
+        migrate_qmp_fail(from, connect_uri, "{}");
+        goto finish;
+    }
+
+    migrate_qmp(from, connect_uri, "{}");
+    wait_for_migration_complete(from);
+
+    /*
+     * We need to wait for the source to finish before starting the
+     * destination.
+     */
+    migrate_incoming_qmp(to, connect_uri, "{}");
+    wait_for_migration_complete(to);
+
+    if (stop_src) {
+        qtest_qmp_assert_success(to, "{ 'execute' : 'cont'}");
+    }
+
+    if (!got_dst_resume) {
+        qtest_qmp_eventwait(to, "RESUME");
+    }
+
+    wait_for_serial("dest_serial");
+
+finish:
+    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);
@@ -1805,6 +1931,76 @@ static void test_precopy_unix_compress_nowait(void)
     test_precopy_common(&args);
 }
 
+static void test_precopy_file(void)
+{
+    g_autofree char *uri = g_strdup_printf("file:%s/%s", tmpfs,
+                                           FILE_TEST_FILENAME);
+    MigrateCommon args = {
+        .connect_uri = uri,
+        .listen_uri = "defer",
+    };
+
+    test_file_common(&args, true);
+}
+
+static void file_offset_finish_hook(QTestState *from, QTestState *to,
+                                    void *opaque)
+{
+#if defined(__linux__)
+    g_autofree char *path = g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FILENAME);
+    size_t size = FILE_TEST_OFFSET + sizeof(QEMU_VM_FILE_MAGIC);
+    uintptr_t *addr, *p;
+    int fd;
+
+    fd = open(path, O_RDONLY);
+    g_assert(fd != -1);
+    addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
+    g_assert(addr != MAP_FAILED);
+
+    /*
+     * Ensure the skipped offset contains zeros and the migration
+     * stream starts at the right place.
+     */
+    p = addr;
+    while (p < addr + FILE_TEST_OFFSET / sizeof(uintptr_t)) {
+        g_assert(*p == 0);
+        p++;
+    }
+    g_assert_cmpint(cpu_to_be64(*p) >> 32, ==, QEMU_VM_FILE_MAGIC);
+
+    munmap(addr, size);
+    close(fd);
+#endif
+}
+
+static void test_precopy_file_offset(void)
+{
+    g_autofree char *uri = g_strdup_printf("file:%s/%s,offset=%d", tmpfs,
+                                           FILE_TEST_FILENAME,
+                                           FILE_TEST_OFFSET);
+    MigrateCommon args = {
+        .connect_uri = uri,
+        .listen_uri = "defer",
+        .finish_hook = file_offset_finish_hook,
+    };
+
+    test_file_common(&args, false);
+}
+
+static void test_precopy_file_offset_bad(void)
+{
+    /* using a value not supported by qemu_strtosz() */
+    g_autofree char *uri = g_strdup_printf("file:%s/%s,offset=0x20M",
+                                           tmpfs, FILE_TEST_FILENAME);
+    MigrateCommon args = {
+        .connect_uri = uri,
+        .listen_uri = "defer",
+        .result = MIG_TEST_QMP_ERROR,
+    };
+
+    test_file_common(&args, false);
+}
+
 static void test_precopy_tcp_plain(void)
 {
     MigrateCommon args = {
@@ -2837,6 +3033,9 @@ int main(int argc, char **argv)
     }
 
     qtest_add_func("/migration/bad_dest", test_baddest);
+#ifndef _WIN32
+    qtest_add_func("/migration/analyze-script", test_analyze_script);
+#endif
     qtest_add_func("/migration/precopy/unix/plain", test_precopy_unix_plain);
     qtest_add_func("/migration/precopy/unix/xbzrle", test_precopy_unix_xbzrle);
     /*
@@ -2849,6 +3048,14 @@ int main(int argc, char **argv)
         qtest_add_func("/migration/precopy/unix/compress/nowait",
                        test_precopy_unix_compress_nowait);
     }
+
+    qtest_add_func("/migration/precopy/file",
+                   test_precopy_file);
+    qtest_add_func("/migration/precopy/file/offset",
+                   test_precopy_file_offset);
+    qtest_add_func("/migration/precopy/file/offset/bad",
+                   test_precopy_file_offset_bad);
+
 #ifdef CONFIG_GNUTLS
     qtest_add_func("/migration/precopy/unix/tls/psk",
                    test_precopy_unix_tls_psk);