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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1762643136; 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=8RbXOGFHGqgI1H/gtUzVCIZikkCvOAXL9Avnt8QXKdQ=; b=OMrN/rNdHlTNiWjbAkETGV6E3aW4y6Cy0hUMOFJXUsa7Sw4x0I+Apk4b3XWODbOFTB4LE5 fUMsJOippaFGkbwMkHrKgjG8e/hDPJK1alCBCkplrBM7Y5GKkpV6SuUGHTc2W0D2lMypFw Z4UNpCdS0HMKgbixj3pwvhg2gkOqSMk= X-MC-Unique: 9Ntg46mJOyKBI6iExW6_JQ-1 X-Mimecast-MFC-AGG-ID: 9Ntg46mJOyKBI6iExW6_JQ_1762643134 From: Eric Blake To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, berrange@redhat.com, kwolf@redhat.com Subject: [PATCH v2 02/12] qio: Add trace points to net_listener Date: Sat, 8 Nov 2025 16:59:23 -0600 Message-ID: <20251108230525.3169174-16-eblake@redhat.com> In-Reply-To: <20251108230525.3169174-14-eblake@redhat.com> References: <20251108230525.3169174-14-eblake@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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 --- v2: Make tracepoints unconditional, rename to match later refactoring patch, document io_func in unwatch --- io/net-listener.c | 10 ++++++++++ io/trace-events | 5 +++++ 2 files changed, 15 insertions(+) diff --git a/io/net-listener.c b/io/net-listener.c index 47405965a66..007acbd5b18 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); } @@ -123,6 +125,7 @@ void qio_net_listener_add(QIONetListener *listener, object_ref(OBJECT(sioc)); listener->connected =3D true; + trace_qio_net_listener_watch(listener, listener->io_func, "add"); if (listener->io_func !=3D NULL) { object_ref(OBJECT(listener)); listener->io_source[listener->nsioc] =3D qio_channel_add_watch_sou= rce( @@ -143,6 +146,8 @@ void qio_net_listener_set_client_func_full(QIONetListen= er *listener, { size_t i; + trace_qio_net_listener_unwatch(listener, listener->io_func, + "set_client_func"); if (listener->io_notify) { listener->io_notify(listener->io_data); } @@ -158,6 +163,8 @@ void qio_net_listener_set_client_func_full(QIONetListen= er *listener, } } + trace_qio_net_listener_watch(listener, listener->io_func, + "set_client_func"); if (listener->io_func !=3D NULL) { for (i =3D 0; i < listener->nsioc; i++) { object_ref(OBJECT(listener)); @@ -218,6 +225,7 @@ QIOChannelSocket *qio_net_listener_wait_client(QIONetLi= stener *listener) }; size_t i; + trace_qio_net_listener_unwatch(listener, listener->io_func, "wait_clie= nt"); for (i =3D 0; i < listener->nsioc; i++) { if (listener->io_source[i]) { g_source_destroy(listener->io_source[i]); @@ -247,6 +255,7 @@ QIOChannelSocket *qio_net_listener_wait_client(QIONetLi= stener *listener) g_main_loop_unref(loop); g_main_context_unref(ctxt); + trace_qio_net_listener_watch(listener, listener->io_func, "wait_client= "); if (listener->io_func !=3D NULL) { for (i =3D 0; i < listener->nsioc; i++) { object_ref(OBJECT(listener)); @@ -268,6 +277,7 @@ void qio_net_listener_disconnect(QIONetListener *listen= er) return; } + trace_qio_net_listener_unwatch(listener, listener->io_func, "disconnec= t"); 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..10976eca5fe 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(void *listener, void *func, const char *extra) "Net= listener=3D%p watch enabled func=3D%p by %s" +qio_net_listener_unwatch(void *listener, void *func, const char *extra) "N= et listener=3D%p watch disabled func=3D%p 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