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colo: check chardev can switch context

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COLO uses a worker context (iothread) to drive the chardev. All
backends are not able to switch the context, let's report an error in
this case.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20181205203737.9011-6-marcandre.lureau@redhat.com>
Reviewed-by: Li Zhijian <lizhiian@cn.fujitsu.com>
Reviewed-by: Zhang Chen <zhangckid@gmail.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-12-06 00:37:35 +04:00 committed by Markus Armbruster
parent a9a0d9b99a
commit 269d25cdeb
1 changed files with 6 additions and 0 deletions
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6
net/colo-compare.c
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@ -957,6 +957,12 @@ static int find_and_check_chardev(Chardev **chr,
return 1; return 1;
} }
if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_GCONTEXT)) {
error_setg(errp, "chardev \"%s\" cannot switch context",
chr_name);
return 1;
}
return 0; return 0;
} }