Merge remote-tracking branch 'remotes/armbru/tags/pull-monitor-2018-07-03-v2' into staging

Monitor patches for 2018-07-03

# gpg: Signature made Tue 03 Jul 2018 22:20:13 BST
# gpg:                using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-monitor-2018-07-03-v2: (32 commits)
  qapi: Polish command flags documentation in qapi-code-gen.txt
  monitor: Improve some comments
  qmp: Clean up capability negotiation after commit 02130314d8c
  qobject: Let qobject_from_jsonf() fail instead of abort
  qmp: Switch timestamp_put() to qdict_from_jsonf_nofail()
  qmp: Add some comments around null responses
  qmp: Simplify monitor_qmp_respond()
  qmp: Replace get_qmp_greeting() by qmp_greeting()
  qmp: Replace monitor_json_emitter{,raw}() by qmp_{queue,send}_response()
  qmp: Use QDict * instead of QObject * for response objects
  qmp: De-duplicate error response building
  qobject: New qdict_from_jsonf_nofail()
  monitor: Peel off @mon_global wrapper
  monitor: Rename use_io_thr to use_io_thread
  qmp: Don't let JSON errors jump the queue
  qmp: Don't let malformed in-band commands jump the queue
  tests/qmp-test: Demonstrate QMP errors jumping the queue
  qmp: Simplify code around monitor_qmp_dispatch_one()
  qmp: Always free QMPRequest with qmp_request_free()
  qmp: Revert change to handle_qmp_command tracepoint
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 119 insertions, 47 deletions

diff --git a/tests/qapi-schema/qapi-schema-test.json b/tests/qapi-schema/qapi-schema-test.json
index 16209b5..11aa4c8 100644
--- a/tests/qapi-schema/qapi-schema-test.json
+++ b/tests/qapi-schema/qapi-schema-test.json
@@ -144,7 +144,7 @@
 { 'command': 'boxed-struct', 'boxed': true, 'data': 'UserDefZero' }
 { 'command': 'boxed-union', 'data': 'UserDefNativeListUnion', 'boxed': true }
 
-# Smoke test on Out-Of-Band and allow-preconfig-test
+# Smoke test on out-of-band and allow-preconfig-test
 { 'command': 'test-flags-command', 'allow-oob': true, 'allow-preconfig': true }
 
 # For testing integer range flattening in opts-visitor. The following schema
diff --git a/tests/qmp-test.c b/tests/qmp-test.c
index a49cbc6..ceaf4a6 100644
--- a/tests/qmp-test.c
+++ b/tests/qmp-test.c
@@ -135,16 +135,65 @@ static void test_qmp_protocol(void)
     qtest_quit(qts);
 }
 
-/* Tests for Out-Of-Band support. */
+/* Out-of-band tests */
+
+char tmpdir[] = "/tmp/qmp-test-XXXXXX";
+char *fifo_name;
+
+static void setup_blocking_cmd(void)
+{
+    if (!mkdtemp(tmpdir)) {
+        g_error("mkdtemp: %s", strerror(errno));
+    }
+    fifo_name = g_strdup_printf("%s/fifo", tmpdir);
+    if (mkfifo(fifo_name, 0666)) {
+        g_error("mkfifo: %s", strerror(errno));
+    }
+}
+
+static void cleanup_blocking_cmd(void)
+{
+    unlink(fifo_name);
+    rmdir(tmpdir);
+}
+
+static void send_cmd_that_blocks(QTestState *s, const char *id)
+{
+    qtest_async_qmp(s, "{ 'execute': 'blockdev-add',  'id': %s,"
+                    " 'arguments': {"
+                    " 'driver': 'blkdebug', 'node-name': %s,"
+                    " 'config': %s,"
+                    " 'image': { 'driver': 'null-co' } } }",
+                    id, id, fifo_name);
+}
+
+static void unblock_blocked_cmd(void)
+{
+    int fd = open(fifo_name, O_WRONLY);
+    g_assert(fd >= 0);
+    close(fd);
+}
+
+static void send_oob_cmd_that_fails(QTestState *s, const char *id)
+{
+    qtest_async_qmp(s, "{ 'exec-oob': 'migrate-pause', 'id': %s }", id);
+}
+
+static void recv_cmd_id(QTestState *s, const char *id)
+{
+    QDict *resp = qtest_qmp_receive(s);
+
+    g_assert_cmpstr(qdict_get_try_str(resp, "id"), ==, id);
+    qobject_unref(resp);
+}
+
 static void test_qmp_oob(void)
 {
     QTestState *qts;
     QDict *resp, *q;
-    int acks = 0;
     const QListEntry *entry;
     QList *capabilities;
     QString *qstr;
-    const char *cmd_id;
 
     qts = qtest_init_without_qmp_handshake(true, common_args);
 
@@ -179,43 +228,33 @@ static void test_qmp_oob(void)
      * Try any command that does not support OOB but with OOB flag. We
      * should get failure.
      */
-    resp = qtest_qmp(qts,
-                     "{ 'execute': 'query-cpus',"
-                     "  'control': { 'run-oob': true } }");
+    resp = qtest_qmp(qts, "{ 'exec-oob': 'query-cpus' }");
     g_assert(qdict_haskey(resp, "error"));
     qobject_unref(resp);
 
-    /*
-     * First send the "x-oob-test" command with lock=true and
-     * oob=false, it should hang the dispatcher and main thread;
-     * later, we send another lock=false with oob=true to continue
-     * that thread processing.  Finally we should receive replies from
-     * both commands.
-     */
-    qtest_async_qmp(qts,
-                    "{ 'execute': 'x-oob-test',"
-                    "  'arguments': { 'lock': true }, "
-                    "  'id': 'lock-cmd'}");
-    qtest_async_qmp(qts,
-                    "{ 'execute': 'x-oob-test', "
-                    "  'arguments': { 'lock': false }, "
-                    "  'control': { 'run-oob': true }, "
-                    "  'id': 'unlock-cmd' }");
-
-    /* Ignore all events.  Wait for 2 acks */
-    while (acks < 2) {
-        resp = qtest_qmp_receive(qts);
-        cmd_id = qdict_get_str(resp, "id");
-        if (!g_strcmp0(cmd_id, "lock-cmd") ||
-            !g_strcmp0(cmd_id, "unlock-cmd")) {
-            acks++;
-        }
-        qobject_unref(resp);
-    }
+    /* OOB command overtakes slow in-band command */
+    setup_blocking_cmd();
+    send_cmd_that_blocks(qts, "ib-blocks-1");
+    qtest_async_qmp(qts, "{ 'execute': 'query-name', 'id': 'ib-quick-1' }");
+    send_oob_cmd_that_fails(qts, "oob-1");
+    recv_cmd_id(qts, "oob-1");
+    unblock_blocked_cmd();
+    recv_cmd_id(qts, "ib-blocks-1");
+    recv_cmd_id(qts, "ib-quick-1");
+
+    /* Even malformed in-band command fails in-band */
+    send_cmd_that_blocks(qts, "blocks-2");
+    qtest_async_qmp(qts, "{ 'id': 'err-2' }");
+    unblock_blocked_cmd();
+    recv_cmd_id(qts, "blocks-2");
+    recv_cmd_id(qts, "err-2");
+    cleanup_blocking_cmd();
 
     qtest_quit(qts);
 }
 
+/* Query smoke tests */
+
 static int query_error_class(const char *cmd)
 {
     static struct {
@@ -392,6 +431,8 @@ static void add_query_tests(QmpSchema *schema)
     }
 }
 
+/* Preconfig tests */
+
 static void test_qmp_preconfig(void)
 {
     QDict *rsp, *ret;
diff --git a/tests/test-qga.c b/tests/test-qga.c
index 350f278..d638b15 100644
--- a/tests/test-qga.c
+++ b/tests/test-qga.c
@@ -227,6 +227,38 @@ static void test_qga_ping(gconstpointer fix)
     qobject_unref(ret);
 }
 
+static void test_qga_invalid_id(gconstpointer fix)
+{
+    const TestFixture *fixture = fix;
+    QDict *ret, *error;
+    const char *class;
+
+    ret = qmp_fd(fixture->fd, "{'execute': 'guest-ping', 'id': 1}");
+    g_assert_nonnull(ret);
+
+    error = qdict_get_qdict(ret, "error");
+    class = qdict_get_try_str(error, "class");
+    g_assert_cmpstr(class, ==, "GenericError");
+
+    qobject_unref(ret);
+}
+
+static void test_qga_invalid_oob(gconstpointer fix)
+{
+    const TestFixture *fixture = fix;
+    QDict *ret, *error;
+    const char *class;
+
+    ret = qmp_fd(fixture->fd, "{'exec-oob': 'guest-ping'}");
+    g_assert_nonnull(ret);
+
+    error = qdict_get_qdict(ret, "error");
+    class = qdict_get_try_str(error, "class");
+    g_assert_cmpstr(class, ==, "GenericError");
+
+    qobject_unref(ret);
+}
+
 static void test_qga_invalid_args(gconstpointer fix)
 {
     const TestFixture *fixture = fix;
@@ -982,6 +1014,8 @@ int main(int argc, char **argv)
     g_test_add_data_func("/qga/file-ops", &fix, test_qga_file_ops);
     g_test_add_data_func("/qga/file-write-read", &fix, test_qga_file_write_read);
     g_test_add_data_func("/qga/get-time", &fix, test_qga_get_time);
+    g_test_add_data_func("/qga/invalid-id", &fix, test_qga_invalid_id);
+    g_test_add_data_func("/qga/invalid-oob", &fix, test_qga_invalid_oob);
     g_test_add_data_func("/qga/invalid-cmd", &fix, test_qga_invalid_cmd);
     g_test_add_data_func("/qga/invalid-args", &fix, test_qga_invalid_args);
     g_test_add_data_func("/qga/fsfreeze-status", &fix,
diff --git a/tests/test-qmp-cmds.c b/tests/test-qmp-cmds.c
index ce277c9..ba41a61 100644
--- a/tests/test-qmp-cmds.c
+++ b/tests/test-qmp-cmds.c
@@ -110,13 +110,13 @@ __org_qemu_x_Union1 *qmp___org_qemu_x_command(__org_qemu_x_EnumList *a,
 static void test_dispatch_cmd(void)
 {
     QDict *req = qdict_new();
-    QObject *resp;
+    QDict *resp;
 
     qdict_put_str(req, "execute", "user_def_cmd");
 
-    resp = qmp_dispatch(&qmp_commands, QOBJECT(req));
+    resp = qmp_dispatch(&qmp_commands, QOBJECT(req), false);
     assert(resp != NULL);
-    assert(!qdict_haskey(qobject_to(QDict, resp), "error"));
+    assert(!qdict_haskey(resp, "error"));
 
     qobject_unref(resp);
     qobject_unref(req);
@@ -127,13 +127,13 @@ static void test_dispatch_cmd_failure(void)
 {
     QDict *req = qdict_new();
     QDict *args = qdict_new();
-    QObject *resp;
+    QDict *resp;
 
     qdict_put_str(req, "execute", "user_def_cmd2");
 
-    resp = qmp_dispatch(&qmp_commands, QOBJECT(req));
+    resp = qmp_dispatch(&qmp_commands, QOBJECT(req), false);
     assert(resp != NULL);
-    assert(qdict_haskey(qobject_to(QDict, resp), "error"));
+    assert(qdict_haskey(resp, "error"));
 
     qobject_unref(resp);
     qobject_unref(req);
@@ -145,9 +145,9 @@ static void test_dispatch_cmd_failure(void)
 
     qdict_put_str(req, "execute", "user_def_cmd");
 
-    resp = qmp_dispatch(&qmp_commands, QOBJECT(req));
+    resp = qmp_dispatch(&qmp_commands, QOBJECT(req), false);
     assert(resp != NULL);
-    assert(qdict_haskey(qobject_to(QDict, resp), "error"));
+    assert(qdict_haskey(resp, "error"));
 
     qobject_unref(resp);
     qobject_unref(req);
@@ -155,18 +155,15 @@ static void test_dispatch_cmd_failure(void)
 
 static QObject *test_qmp_dispatch(QDict *req)
 {
-    QObject *resp_obj;
     QDict *resp;
     QObject *ret;
 
-    resp_obj = qmp_dispatch(&qmp_commands, QOBJECT(req));
-    assert(resp_obj);
-    resp = qobject_to(QDict, resp_obj);
+    resp = qmp_dispatch(&qmp_commands, QOBJECT(req), false);
     assert(resp && !qdict_haskey(resp, "error"));
     ret = qdict_get(resp, "return");
     assert(ret);
     qobject_ref(ret);
-    qobject_unref(resp_obj);
+    qobject_unref(resp);
     return ret;
 }