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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1762201738; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8sKETWfJjHc4CXcUbADX9wTUC00+MGTXyf9La3ddVEY=; b=gRhyk4OH+RH4rhBsc+jeW5y9sXugwzSzz3FUWQodNmRAAgxSYkgMl2aDNsSumWBjQXMgcB RSx9IxXVnANIWehTXpeOaG5rBCrLH1lSi5v2zHL9NgxkPzUhAsEMTPn/dXKATze61Mkq+Y KRCaTYcKzHdI/IaGPqPgsdvFrDGpO4Y= X-MC-Unique: g6zC2akXNiKPQ2F4Z54xrA-1 X-Mimecast-MFC-AGG-ID: g6zC2akXNiKPQ2F4Z54xrA_1762201736 From: Eric Blake To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, berrange@redhat.com, kwolf@redhat.com Subject: [PATCH 1/8] qio: Add trace points to net_listener Date: Mon, 3 Nov 2025 14:10:52 -0600 Message-ID: <20251103202849.3687643-11-eblake@redhat.com> In-Reply-To: <20251103202849.3687643-10-eblake@redhat.com> References: <20251103202849.3687643-10-eblake@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Upcoming patches will adjust how net_listener watches for new client connections; adding trace points now makes it easier to debug that the changes work as intended. For example, adding --trace=3D'qio_net_listener*' to the qemu-storage-daemon command line before --nbd-server will track when the server first starts listening for clients. Signed-off-by: Eric Blake Reviewed-by: Daniel P. Berrang=C3=A9 --- io/net-listener.c | 17 +++++++++++++++++ io/trace-events | 5 +++++ 2 files changed, 22 insertions(+) diff --git a/io/net-listener.c b/io/net-listener.c index 47405965a66..0adbc409cf2 100644 --- a/io/net-listener.c +++ b/io/net-listener.c @@ -23,6 +23,7 @@ #include "io/dns-resolver.h" #include "qapi/error.h" #include "qemu/module.h" +#include "trace.h" QIONetListener *qio_net_listener_new(void) { @@ -50,6 +51,7 @@ static gboolean qio_net_listener_channel_func(QIOChannel = *ioc, return TRUE; } + trace_qio_net_listener_callback(listener, listener->io_func); if (listener->io_func) { listener->io_func(listener, sioc, listener->io_data); } @@ -124,6 +126,8 @@ void qio_net_listener_add(QIONetListener *listener, listener->connected =3D true; if (listener->io_func !=3D NULL) { + trace_qio_net_listener_watch_enabled(listener, listener->io_func, + "add"); object_ref(OBJECT(listener)); listener->io_source[listener->nsioc] =3D qio_channel_add_watch_sou= rce( QIO_CHANNEL(listener->sioc[listener->nsioc]), G_IO_IN, @@ -143,6 +147,9 @@ void qio_net_listener_set_client_func_full(QIONetListen= er *listener, { size_t i; + if (listener->io_func) { + trace_qio_net_listener_watch_disabled(listener, "set_client_func"); + } if (listener->io_notify) { listener->io_notify(listener->io_data); } @@ -159,6 +166,8 @@ void qio_net_listener_set_client_func_full(QIONetListen= er *listener, } if (listener->io_func !=3D NULL) { + trace_qio_net_listener_watch_enabled(listener, listener->io_func, + "set_client_func"); for (i =3D 0; i < listener->nsioc; i++) { object_ref(OBJECT(listener)); listener->io_source[i] =3D qio_channel_add_watch_source( @@ -218,6 +227,9 @@ QIOChannelSocket *qio_net_listener_wait_client(QIONetLi= stener *listener) }; size_t i; + if (listener->io_func) { + trace_qio_net_listener_watch_disabled(listener, "wait_client"); + } for (i =3D 0; i < listener->nsioc; i++) { if (listener->io_source[i]) { g_source_destroy(listener->io_source[i]); @@ -248,6 +260,8 @@ QIOChannelSocket *qio_net_listener_wait_client(QIONetLi= stener *listener) g_main_context_unref(ctxt); if (listener->io_func !=3D NULL) { + trace_qio_net_listener_watch_enabled(listener, listener->io_func, + "wait_client"); for (i =3D 0; i < listener->nsioc; i++) { object_ref(OBJECT(listener)); listener->io_source[i] =3D qio_channel_add_watch_source( @@ -268,6 +282,9 @@ void qio_net_listener_disconnect(QIONetListener *listen= er) return; } + if (listener->io_func) { + trace_qio_net_listener_watch_disabled(listener, "disconnect"); + } for (i =3D 0; i < listener->nsioc; i++) { if (listener->io_source[i]) { g_source_destroy(listener->io_source[i]); diff --git a/io/trace-events b/io/trace-events index dc3a63ba1fb..8cc4cae3a5d 100644 --- a/io/trace-events +++ b/io/trace-events @@ -72,3 +72,8 @@ qio_channel_command_new_pid(void *ioc, int writefd, int r= eadfd, int pid) "Comman qio_channel_command_new_spawn(void *ioc, const char *binary, int flags) "C= ommand new spawn ioc=3D%p binary=3D%s flags=3D%d" qio_channel_command_abort(void *ioc, int pid) "Command abort ioc=3D%p pid= =3D%d" qio_channel_command_wait(void *ioc, int pid, int ret, int status) "Command= abort ioc=3D%p pid=3D%d ret=3D%d status=3D%d" + +# net-listener.c +qio_net_listener_watch_enabled(void *listener, void *func, const char *ext= ra) "Net listener=3D%p watch enabled func=3D%p by %s" +qio_net_listener_watch_disabled(void *listener, const char *extra) "Net li= stener=3D%p watch disabled by %s" +qio_net_listener_callback(void *listener, void *func) "Net listener=3D%p c= allback forwarding to func=3D%p" --=20 2.51.1