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GET /api/1.1/patches/2229964/?format=api
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{
    "id": 2229964,
    "url": "http://patchwork.ozlabs.org/api/1.1/patches/2229964/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429003130.15164-3-farosas@suse.de/",
    "project": {
        "id": 14,
        "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api",
        "name": "QEMU Development",
        "link_name": "qemu-devel",
        "list_id": "qemu-devel.nongnu.org",
        "list_email": "qemu-devel@nongnu.org",
        "web_url": "",
        "scm_url": "",
        "webscm_url": ""
    },
    "msgid": "<20260429003130.15164-3-farosas@suse.de>",
    "date": "2026-04-29T00:31:29",
    "name": "[v1,2/3] tests/qtest: Individual verbose switches",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "8eb7a3eaa50609f2881158f04d2762ab48e80d62",
    "submitter": {
        "id": 85343,
        "url": "http://patchwork.ozlabs.org/api/1.1/people/85343/?format=api",
        "name": "Fabiano Rosas",
        "email": "farosas@suse.de"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429003130.15164-3-farosas@suse.de/mbox/",
    "series": [
        {
            "id": 501965,
            "url": "http://patchwork.ozlabs.org/api/1.1/series/501965/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501965",
            "date": "2026-04-29T00:31:27",
            "name": "tests/qtest: Tweak env variables",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/501965/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2229964/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2229964/checks/",
    "tags": {},
    "headers": {
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        ],
        "From": "Fabiano Rosas <farosas@suse.de>",
        "To": "qemu-devel@nongnu.org",
        "Cc": "Alexander Bulekov <alxndr@bu.edu>, Paolo Bonzini <pbonzini@redhat.com>,\n Stefan Hajnoczi <stefanha@redhat.com>,\n Darren Kenny <darren.kenny@oracle.com>,\n Laurent Vivier <lvivier@redhat.com>, Peter Xu <peterx@redhat.com>,\n Michael Roth <michael.roth@amd.com>,\n Kostiantyn Kostiuk <kkostiuk@redhat.com>",
        "Subject": "[PATCH v1 2/3] tests/qtest: Individual verbose switches",
        "Date": "Tue, 28 Apr 2026 21:31:29 -0300",
        "Message-ID": "<20260429003130.15164-3-farosas@suse.de>",
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        "References": "<20260429003130.15164-1-farosas@suse.de>",
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    },
    "content": "Allow logging to be set for specific parts of QTest. Having a single\nQTEST_LOG knob creates an output stream that is almost useless due to\nspamming from some operations.\n\nAdd a backward-compatible way of selecting which parts will be made\nverbose. Reuse the existing QTEST_LOG variable. The new options are:\n\nQTEST_LOG=\nfuzz - fuzz.c\nqga - unit/test-qga.c\nqmp - libqmp.c\nqtest - QTest device, i.e. -qtest-log option\ntest - generic term for usage of all tests\n\nE.g.:\n\nQTEST_LOG=fuzz,qga,qmp,qtest,test\n  equivalent to QTEST_LOG=1\n\nQTEST_LOG=qmp,qtest\n  enables logging of qmp operations from libqmp.c and logging of the\n  qtest device.\n\nQTEST_LOG=test,qmp\n  enable test output and libqmp.c output.\n\nQTEST_LOG=-qmp\n  enable all output, except for libqmp.c\n\nSigned-off-by: Fabiano Rosas <farosas@suse.de>\n---\n tests/qtest/fuzz/fuzz.c               |  7 ++--\n tests/qtest/fuzz/generic_fuzz.c       |  2 +-\n tests/qtest/libqmp.c                  |  7 ++--\n tests/qtest/libqtest.c                | 56 ++++++++++++++++++++++++++-\n tests/qtest/libqtest.h                | 11 ++++++\n tests/qtest/migration/framework.c     |  2 +-\n tests/qtest/migration/framework.h     |  5 ++-\n tests/qtest/migration/precopy-tests.c |  2 +-\n tests/unit/meson.build                |  2 +-\n tests/unit/test-qga.c                 |  2 +-\n 10 files changed, 82 insertions(+), 14 deletions(-)",
    "diff": "diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c\nindex ca248a51a6..d235598961 100644\n--- a/tests/qtest/fuzz/fuzz.c\n+++ b/tests/qtest/fuzz/fuzz.c\n@@ -105,7 +105,7 @@ static void usage(char *path)\n            \"Set the environment variable FUZZ_SERIALIZE_QTEST=1 to serialize\\n\"\n            \"QTest commands into an ASCII protocol. Useful for building crash\\n\"\n            \"reproducers, but slows down execution.\\n\\n\"\n-           \"Set the environment variable QTEST_LOG=1 to log all qtest commands\"\n+           \"Set the environment variable QTEST_LOG=fuzz to log all qtest commands\"\n            \"\\n\");\n     exit(0);\n }\n@@ -168,6 +168,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)\n     GString *cmd_line;\n     gchar *pretty_cmd_line;\n     bool serialize = false;\n+    bool verbose = qtest_verbose(\"fuzz\");\n \n     /* Initialize qgraph and modules */\n     qos_graph_init();\n@@ -211,14 +212,14 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)\n     /* Run QEMU's system main with the fuzz-target dependent arguments */\n     cmd_line = fuzz_target->get_init_cmdline(fuzz_target);\n     g_string_append_printf(cmd_line, \" %s -qtest /dev/null \",\n-                           getenv(\"QTEST_LOG\") ? \"\" : \"-qtest-log none\");\n+                           verbose ? \"\" : \"-qtest-log none\");\n \n     /* Split the runcmd into an argv and argc */\n     wordexp_t result;\n     wordexp(cmd_line->str, &result, 0);\n     g_string_free(cmd_line, true);\n \n-    if (getenv(\"QTEST_LOG\")) {\n+    if (verbose) {\n         pretty_cmd_line  = g_strjoinv(\" \", result.we_wordv + 1);\n         printf(\"Starting %s with Arguments: %s\\n\",\n                 result.we_wordv[0], pretty_cmd_line);\ndiff --git a/tests/qtest/fuzz/generic_fuzz.c b/tests/qtest/fuzz/generic_fuzz.c\nindex 440de25034..e48f868775 100644\n--- a/tests/qtest/fuzz/generic_fuzz.c\n+++ b/tests/qtest/fuzz/generic_fuzz.c\n@@ -776,7 +776,7 @@ static void generic_pre_fuzz(QTestState *s)\n     if (!getenv(\"QEMU_FUZZ_OBJECTS\")) {\n         usage();\n     }\n-    if (getenv(\"QTEST_LOG\")) {\n+    if (qtest_verbose(\"fuzz\")) {\n         qtest_log_enabled = 1;\n     }\n     if (getenv(\"QEMU_AVOID_DOUBLE_FETCH\")) {\ndiff --git a/tests/qtest/libqmp.c b/tests/qtest/libqmp.c\nindex 16fe546885..cd12bd2678 100644\n--- a/tests/qtest/libqmp.c\n+++ b/tests/qtest/libqmp.c\n@@ -17,6 +17,7 @@\n #include \"qemu/osdep.h\"\n \n #include \"libqmp.h\"\n+#include \"libqtest.h\"\n \n #ifndef _WIN32\n #include <sys/socket.h>\n@@ -62,7 +63,7 @@ static void qmp_response(void *opaque, QObject *obj, Error *err)\n QDict *qmp_fd_receive(int fd)\n {\n     QMPResponseParser qmp;\n-    bool log = getenv(\"QTEST_LOG\") != NULL;\n+    bool log = qtest_verbose(\"qmp\");\n \n     qmp.response = NULL;\n     json_message_parser_init(&qmp.parser, qmp_response, &qmp, NULL);\n@@ -149,7 +150,7 @@ _qmp_fd_vsend_fds(int fd, int *fds, size_t fds_num,\n \n     /* No need to send anything for an empty QObject.  */\n     if (qobj) {\n-        int log = getenv(\"QTEST_LOG\") != NULL;\n+        bool log = qtest_verbose(\"qmp\");\n         GString *str = qobject_to_json(qobj);\n \n         /*\n@@ -220,7 +221,7 @@ void qmp_fd_send(int fd, const char *fmt, ...)\n \n void qmp_fd_vsend_raw(int fd, const char *fmt, va_list ap)\n {\n-    bool log = getenv(\"QTEST_LOG\") != NULL;\n+    bool log = qtest_verbose(\"qmp\");\n     char *str = g_strdup_vprintf(fmt, ap);\n \n     if (log) {\ndiff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c\nindex a580d75179..b12b8d3dce 100644\n--- a/tests/qtest/libqtest.c\n+++ b/tests/qtest/libqtest.c\n@@ -469,7 +469,7 @@ gchar *qtest_qemu_args(const char *extra_args)\n                       \" -accel qtest\",\n \n                       socket_path,\n-                      getenv(\"QTEST_LOG\") ? DEV_STDERR : DEV_NULL,\n+                      qtest_verbose(\"qtest\") ? DEV_STDERR : DEV_NULL,\n                       qmp_socket_path,\n                       can_exit_with_parent() ?\n                       \"-run-with exit-with-parent=on \" : \"\",\n@@ -2125,3 +2125,57 @@ bool mkimg(const char *file, const char *fmt, unsigned size_mb)\n \n     return ret && !err;\n }\n+\n+bool qtest_verbose(const char *domain)\n+{\n+    const char *log = getenv(\"QTEST_LOG\");\n+    char *found;\n+\n+    assert(domain);\n+\n+    if (log) {\n+        /*\n+         * verbose=true for all domains if:\n+         *  QTEST_LOG=\n+         *  QTEST_LOG=1\n+         *  other one-character variations\n+         */\n+        if (log[0] == '\\0' || log[1] == '\\0') {\n+            return true;\n+        }\n+\n+        /*\n+         * verbose=true for specified domains if:\n+         *  QTEST_LOG=<domain>\n+         *  QTEST_LOG=<domain1>,<domain2>\n+         *  allows other separators, except - and +\n+         *\n+         * verbose=false for specified domains if:\n+         *  QTEST_LOG=-<domain>\n+         *  QTEST_LOG=<domain1>,-<domain2> (only false for domain2)\n+         *  allows other separators, except - and +\n+         */\n+        found = strstr(log, domain);\n+\n+        if (found) {\n+            /* reject options given twice */\n+            assert(!strstr(found + strlen(domain), domain));\n+\n+            if (found > log) {\n+                ptrdiff_t i = found - log - 1;\n+                if (log[i] == '-') {\n+                    return false;\n+                }\n+            }\n+            return true;\n+        } else {\n+            /*\n+             * If filtering out a specific domain, all others are\n+             * enabled.\n+             */\n+            return !!strstr(log, \"-\");\n+        }\n+    }\n+\n+    return false;\n+}\ndiff --git a/tests/qtest/libqtest.h b/tests/qtest/libqtest.h\nindex 9c118c89ca..950ea2baaf 100644\n--- a/tests/qtest/libqtest.h\n+++ b/tests/qtest/libqtest.h\n@@ -1178,4 +1178,15 @@ bool have_qemu_img(void);\n  */\n bool mkimg(const char *file, const char *fmt, unsigned size_mb);\n \n+/**\n+ * qtest_verbose:\n+ * @domain: The logging domain\n+ *\n+ * Read the QTEST_LOG environment variable and return whether the\n+ * specified domain is enabled for verbose logging. Enable specific\n+ * logging domains with QTEST_LOG=<domain> or use QTEST_LOG=-<domain> to\n+ * enable all domains except for the specific one.\n+ */\n+bool qtest_verbose(const char *domain);\n+\n #endif\ndiff --git a/tests/qtest/migration/framework.c b/tests/qtest/migration/framework.c\nindex 9f71d51f1e..49c7f37e60 100644\n--- a/tests/qtest/migration/framework.c\n+++ b/tests/qtest/migration/framework.c\n@@ -365,7 +365,7 @@ int migrate_args(char **from, char **to, const char *uri, MigrateStart *args)\n         g_assert_not_reached();\n     }\n \n-    if (!getenv(\"QTEST_LOG\") && args->hide_stderr) {\n+    if (!qtest_verbose(\"test\") && args->hide_stderr) {\n #ifndef _WIN32\n         ignore_stderr = \"2>/dev/null\";\n #else\ndiff --git a/tests/qtest/migration/framework.h b/tests/qtest/migration/framework.h\nindex 79604c60f5..bb534b8110 100644\n--- a/tests/qtest/migration/framework.h\n+++ b/tests/qtest/migration/framework.h\n@@ -118,8 +118,9 @@ typedef void (*TestMigrateEndHook)(QTestState *from,\n  */\n typedef struct {\n     /*\n-     * QTEST_LOG=1 may override this.  When QTEST_LOG=1, we always dump errors\n-     * unconditionally, because it means the user would like to be verbose.\n+     * QTEST_LOG=test may override this in which case we dump errors\n+     * unconditionally, because it means the user would like to be\n+     * verbose.\n      */\n     bool hide_stderr;\n     MemType mem_type;\ndiff --git a/tests/qtest/migration/precopy-tests.c b/tests/qtest/migration/precopy-tests.c\nindex a0e3ff0547..e65d9e04a5 100644\n--- a/tests/qtest/migration/precopy-tests.c\n+++ b/tests/qtest/migration/precopy-tests.c\n@@ -130,7 +130,7 @@ static bool mlock_check(void)\n static int new_rdma_link(char *buffer, bool ipv6)\n {\n     char cmd[256];\n-    bool verbose = g_getenv(\"QTEST_LOG\");\n+    bool verbose = qtest_verbose(\"test\");\n \n     snprintf(cmd, sizeof(cmd), \"IP_FAMILY=%s %s detect %s\",\n              ipv6 ? \"ipv6\" : \"ipv4\", RDMA_MIGRATION_HELPER,\ndiff --git a/tests/unit/meson.build b/tests/unit/meson.build\nindex 41e8b06c33..4b9d4d5934 100644\n--- a/tests/unit/meson.build\n+++ b/tests/unit/meson.build\n@@ -160,7 +160,7 @@ if have_system\n endif\n \n if have_ga and host_os == 'linux'\n-  tests += {'test-qga': ['../qtest/libqmp.c']}\n+  tests += {'test-qga': ['../qtest/libqmp.c', '../qtest/libqtest.c']}\n   test_deps += {'test-qga': qga}\n endif\n \ndiff --git a/tests/unit/test-qga.c b/tests/unit/test-qga.c\nindex 587e30c7e4..01ccf826e6 100644\n--- a/tests/unit/test-qga.c\n+++ b/tests/unit/test-qga.c\n@@ -68,7 +68,7 @@ fixture_setup(TestFixture *fixture, gconstpointer data, gchar **envp)\n     cmd = g_strdup_printf(\"%s%cqga%cqemu-ga -m unix-listen -t %s -p %s %s %s\",\n                           cwd, G_DIR_SEPARATOR, G_DIR_SEPARATOR,\n                           fixture->test_dir, path,\n-                          getenv(\"QTEST_LOG\") ? \"-v\" : \"\",\n+                          qtest_verbose(\"qga\") ? \"-v\" : \"\",\n                           extra_arg ?: \"\");\n     g_shell_parse_argv(cmd, NULL, &argv, &error);\n     g_assert_no_error(error);\n",
    "prefixes": [
        "v1",
        "2/3"
    ]
}