From 03da94a392ae0fcc37ab753e7c018019ef184ae6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Date: Thu, 14 Jul 2016 20:58:00 +0200 Subject: [PATCH 18/27] tap: use an exit notifier to call down_script MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit RH-Author: Marc-André Lureau Message-id: <20160714205802.2896-3-marcandre.lureau@redhat.com> Patchwork-id: 71190 O-Subject: [RHEV-7.3 qemu-kvm-rhev PATCH 2/4] tap: use an exit notifier to call down_script Bugzilla: 1354090 RH-Acked-by: Xiao Wang RH-Acked-by: Stefan Hajnoczi RH-Acked-by: Paolo Bonzini RH-Acked-by: Laurent Vivier From: Marc-André Lureau We would like to move back net_cleanup() at the end of main function, like it used to be until f30dbae63a46f23116715dff8d130c, but minimum tap cleanup is necessary regarless at exit() time. Use an exit notifier to call TAP down_script. If net_cleanup() is called first, then remove the exit notifier as it will become a dangling pointer otherwise. Signed-off-by: Marc-André Lureau Suggested-by: Paolo Bonzini Message-Id: <20160711144847.16651-1-marcandre.lureau@redhat.com> Reviewed-by: Jason Wang Signed-off-by: Paolo Bonzini (cherry picked from commit 9e32ff32995f8c18f85f20e28ef09bae4ff2e48a) Signed-off-by: Marc-André Lureau Signed-off-by: Miroslav Rezanina --- net/tap.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/net/tap.c b/net/tap.c index 740e8a2..6d3969f 100644 --- a/net/tap.c +++ b/net/tap.c @@ -58,6 +58,7 @@ typedef struct TAPState { bool enabled; VHostNetState *vhost_net; unsigned host_vnet_hdr_len; + Notifier exit; } TAPState; static void launch_script(const char *setup_script, const char *ifname, @@ -292,10 +293,22 @@ static void tap_set_offload(NetClientState *nc, int csum, int tso4, tap_fd_set_offload(s->fd, csum, tso4, tso6, ecn, ufo); } +static void tap_exit_notify(Notifier *notifier, void *data) +{ + TAPState *s = container_of(notifier, TAPState, exit); + Error *err = NULL; + + if (s->down_script[0]) { + launch_script(s->down_script, s->down_script_arg, s->fd, &err); + if (err) { + error_report_err(err); + } + } +} + static void tap_cleanup(NetClientState *nc) { TAPState *s = DO_UPCAST(TAPState, nc, nc); - Error *err = NULL; if (s->vhost_net) { vhost_net_cleanup(s->vhost_net); @@ -304,12 +317,8 @@ static void tap_cleanup(NetClientState *nc) qemu_purge_queued_packets(nc); - if (s->down_script[0]) { - launch_script(s->down_script, s->down_script_arg, s->fd, &err); - if (err) { - error_report_err(err); - } - } + tap_exit_notify(&s->exit, NULL); + qemu_remove_exit_notifier(&s->exit); tap_read_poll(s, false); tap_write_poll(s, false); @@ -379,6 +388,10 @@ static TAPState *net_tap_fd_init(NetClientState *peer, } tap_read_poll(s, true); s->vhost_net = NULL; + + s->exit.notify = tap_exit_notify; + qemu_add_exit_notifier(&s->exit); + return s; } -- 1.8.3.1