From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
Previously there was a single instance of the timer used by
monitor triggered announces, that's OK, but when combined with the
previous change that lets you have announces for subsets of interfaces
it's a bit restrictive if you want to do different things to different
interfaces.
Add an 'id' field to the announce, and maintain a list of the
timers based on id.
This allows you to for example:
a) Start an announce going on interface eth0 for a long time
b) Start an announce going on interface eth1 for a long time
c) Kill the announce on eth0 while leaving eth1 going.
Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
---
hw/net/virtio-net.c | 4 ++--
include/net/announce.h | 8 +++++--
net/announce.c | 52 ++++++++++++++++++++++++++++++++++++------
net/trace-events | 3 ++-
qapi/net.json | 9 ++++++--
5 files changed, 62 insertions(+), 14 deletions(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index c3f5fccfd1..b9e1cd71cf 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -2360,7 +2360,7 @@ static int virtio_net_post_load_device(void *opaque, int
version_id)
timer_mod(n->announce_timer.tm,
qemu_clock_get_ms(n->announce_timer.type));
} else {
- qemu_announce_timer_del(&n->announce_timer);
+ qemu_announce_timer_del(&n->announce_timer, false);
}
}
@@ -2784,7 +2784,7 @@ static void virtio_net_device_unrealize(DeviceState *dev,
Error **errp)
virtio_net_del_queue(n, i);
}
- qemu_announce_timer_del(&n->announce_timer);
+ qemu_announce_timer_del(&n->announce_timer, false);
g_free(n->vqs);
qemu_del_nic(n->nic);
virtio_net_rsc_cleanup(n);
diff --git a/include/net/announce.h b/include/net/announce.h
index 773470428b..3d90c83c23 100644
--- a/include/net/announce.h
+++ b/include/net/announce.h
@@ -22,8 +22,12 @@ struct AnnounceTimer {
/* Returns: update the timer to the next time point */
int64_t qemu_announce_timer_step(AnnounceTimer *timer);
-/* Delete the underlying timer and other data */
-void qemu_announce_timer_del(AnnounceTimer *timer);
+/*
+ * Delete the underlying timer and other data
+ * If 'free_named' true and the timer is a named timer, then remove
+ * it from the list of named timers and free the AnnounceTimer itself.
+ */
+void qemu_announce_timer_del(AnnounceTimer *timer, bool free_named);
/*
* Under BQL/main thread
diff --git a/net/announce.c b/net/announce.c
index 1ce42b571d..db90d3bd4b 100644
--- a/net/announce.c
+++ b/net/announce.c
@@ -15,6 +15,8 @@
#include "qapi/qapi-commands-net.h"
#include "trace.h"
+static GData *named_timers;
+
int64_t qemu_announce_timer_step(AnnounceTimer *timer)
{
int64_t step;
@@ -31,8 +33,13 @@ int64_t qemu_announce_timer_step(AnnounceTimer *timer)
return step;
}
-void qemu_announce_timer_del(AnnounceTimer *timer)
+/*
+ * If 'free_named' is true, then remove the timer from the list
+ * and free the timer itself.
+ */
+void qemu_announce_timer_del(AnnounceTimer *timer, bool free_named)
{
+ bool free_timer = false;
if (timer->tm) {
timer_del(timer->tm);
timer_free(timer->tm);
@@ -40,6 +47,24 @@ void qemu_announce_timer_del(AnnounceTimer *timer)
}
qapi_free_strList(timer->params.interfaces);
timer->params.interfaces = NULL;
+ if (free_named && timer->params.has_id) {
+ AnnounceTimer *list_timer;
+ /*
+ * Sanity check: There should only be one timer on the list with
+ * the id.
+ */
+ list_timer = g_datalist_get_data(&named_timers, timer->params.id);
+ assert(timer == list_timer);
+ free_timer = true;
+ g_datalist_remove_data(&named_timers, timer->params.id);
+ }
+ trace_qemu_announce_timer_del(free_named, free_timer, timer->params.id);
+ g_free(timer->params.id);
+ timer->params.id = NULL;
+
+ if (free_timer) {
+ g_free(timer);
+ }
}
/*
@@ -56,7 +81,7 @@ void qemu_announce_timer_reset(AnnounceTimer *timer,
* We're under the BQL, so the current timer can't
* be firing, so we should be able to delete it.
*/
- qemu_announce_timer_del(timer);
+ qemu_announce_timer_del(timer, false);
QAPI_CLONE_MEMBERS(AnnounceParameters, &timer->params, params);
timer->round = params->rounds;
@@ -120,7 +145,8 @@ static void qemu_announce_self_iter(NICState *nic, void
*opaque)
skip = false;
}
- trace_qemu_announce_self_iter(nic->ncs->name,
+ trace_qemu_announce_self_iter(timer->params.has_id ? timer->params.id :
"_",
+ nic->ncs->name,
qemu_ether_ntoa(&nic->conf->macaddr), skip);
if (!skip) {
@@ -143,7 +169,7 @@ static void qemu_announce_self_once(void *opaque)
if (--timer->round) {
qemu_announce_timer_step(timer);
} else {
- qemu_announce_timer_del(timer);
+ qemu_announce_timer_del(timer, true);
}
}
@@ -154,12 +180,24 @@ void qemu_announce_self(AnnounceTimer *timer,
AnnounceParameters *params)
if (params->rounds) {
qemu_announce_self_once(timer);
} else {
- qemu_announce_timer_del(timer);
+ qemu_announce_timer_del(timer, true);
}
}
void qmp_announce_self(AnnounceParameters *params, Error **errp)
{
- static AnnounceTimer announce_timer;
- qemu_announce_self(&announce_timer, params);
+ AnnounceTimer *named_timer;
+ if (!params->has_id) {
+ params->id = g_strdup("");
+ params->has_id = true;
+ }
+
+ named_timer = g_datalist_get_data(&named_timers, params->id);
+
+ if (!named_timer) {
+ named_timer = g_new0(AnnounceTimer, 1);
+ g_datalist_set_data(&named_timers, params->id, named_timer);
+ }
+
+ qemu_announce_self(named_timer, params);
}
diff --git a/net/trace-events b/net/trace-events
index 875ef2a0f3..ac57056497 100644
--- a/net/trace-events
+++ b/net/trace-events
@@ -1,7 +1,8 @@
# See docs/devel/tracing.txt for syntax documentation.
# announce.c
-qemu_announce_self_iter(const char *name, const char *mac, int skip) "%s:%s
skip: %d"
+qemu_announce_self_iter(const char *id, const char *name, const char *mac, int
skip) "%s:%s:%s skip: %d"
+qemu_announce_timer_del(bool free_named, bool free_timer, char *id) "free
named: %d free timer: %d id: %s"
# vhost-user.c
vhost_user_event(const char *chr, int event) "chr: %s got event: %d"
diff --git a/qapi/net.json b/qapi/net.json
index 6f2cd4f530..728990f4fb 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -702,6 +702,10 @@
# @interfaces: An optional list of interface names, which restricts the
# announcement to the listed interfaces. (Since 4.1)
#
+# @id: A name to be used to identify an instance of announce-timers
+# and to allow it to modified later. Not for use as
+# part of the migration parameters. (Since 4.1)
+#
# Since: 4.0
##
@@ -710,7 +714,8 @@
'max': 'int',
'rounds': 'int',
'step': 'int',
- '*interfaces': ['str'] } }
+ '*interfaces': ['str'],
+ '*id' : 'str' } }
##
# @announce-self:
@@ -725,7 +730,7 @@
# -> { "execute": "announce-self",
# "arguments": {
# "initial": 50, "max": 550, "rounds": 10, "step": 50,
-# "interfaces": ["vn2", "vn3"] } }
+# "interfaces": ["vn2", "vn3"], "id": "bob" } }
# <- { "return": {} }
#
# Since: 4.0
--
2.21.0
