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From: Dominik Csapak <d.csapak@proxmox.com>
To: pve-devel@lists.proxmox.com
Date: Wed, 21 Sep 2022 14:49:10 +0200
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Subject: [pve-devel] [PATCH qemu-server 2/3] qmeventd: cancel 'forced
cleanup' when normal cleanup succeeds
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instead of always sending a SIGKILL to the target pid.
It was not that much of a problem since the timeout previously was 5
seconds and we used pifds where possible, thus the chance of killing the
wrong process was rather slim.
Now we increased the timeout to 60s which makes the race a bit more likely
(when not using pidfds), so remove it from the 'forced_cleanups' list when
the normal cleanup succeeds.
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
qmeventd/qmeventd.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/qmeventd/qmeventd.c b/qmeventd/qmeventd.c
index e9ff5b3..de5efd0 100644
--- a/qmeventd/qmeventd.c
+++ b/qmeventd/qmeventd.c
@@ -415,6 +415,25 @@ cleanup_qemu_client(struct Client *client)
}
}
+static void
+remove_cleanup_data(void *ptr, void *client_ptr) {
+ struct CleanupData *data = (struct CleanupData *)ptr;
+ struct Client *client = (struct Client *)client_ptr;
+
+ if (data->pid == client->pid) {
+ forced_cleanups = g_slist_remove(forced_cleanups, ptr);
+ free(ptr);
+ }
+}
+
+static void
+remove_from_forced_cleanup(struct Client *client) {
+ if (g_slist_length(forced_cleanups) > 0) {
+ VERBOSE_PRINT("removing %s from forced cleanups\n", client->qemu.vmid);
+ g_slist_foreach(forced_cleanups, remove_cleanup_data, client);
+ }
+}
+
void
cleanup_client(struct Client *client)
{
@@ -441,6 +460,7 @@ cleanup_client(struct Client *client)
break;
}
+ remove_from_forced_cleanup(client);
free(client);
}
--
2.30.2