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From e49b0dccdd8687fb269610c86381bdcc8ec42222 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Tue, 22 Jul 2014 18:31:23 +0200
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Subject: [PATCH 03/11] char: report frontend open/closed state in 'query-chardev'
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Message-id: <1406053883-21237-3-git-send-email-lersek@redhat.com>
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Patchwork-id: 60230
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 2/2] char: report frontend open/closed state in 'query-chardev'
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Bugzilla: 1122151
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RH-Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
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RH-Acked-by: Amit Shah <amit.shah@redhat.com>
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RH-Acked-by: Eric Blake <eblake@redhat.com>
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In addition to the on-line reporting added in the previous patch, allow
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libvirt to query frontend state independently of events.
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Libvirt's path to identify the guest agent channel it cares about differs
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between the event added in the previous patch and the QMP response field
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added here. The event identifies the frontend device, by "id". The
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'query-chardev' QMP command identifies the backend device (again by "id").
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The association is under libvirt's control.
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RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1080376
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Reviewed-by: Amit Shah <amit.shah@redhat.com>
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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(cherry picked from commit 32a97ea1711f43388e178b7c43e02143a61e47ee)
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---
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qapi-schema.json | 8 +++++++-
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qemu-char.c | 1 +
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qmp-commands.hx | 19 ++++++++++++++-----
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3 files changed, 22 insertions(+), 6 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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qapi-schema.json | 8 +++++++-
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qemu-char.c | 1 +
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qmp-commands.hx | 19 ++++++++++++++-----
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3 files changed, 22 insertions(+), 6 deletions(-)
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diff --git a/qapi-schema.json b/qapi-schema.json
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index aaa86f5..604ec69 100644
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--- a/qapi-schema.json
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+++ b/qapi-schema.json
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@@ -418,12 +418,18 @@
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#
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# @filename: the filename of the character device
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#
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+# @frontend-open: shows whether the frontend device attached to this backend
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+# (eg. with the chardev=... option) is in open or closed state
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+# (since 2.1)
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+#
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# Notes: @filename is encoded using the QEMU command line character device
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# encoding. See the QEMU man page for details.
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#
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# Since: 0.14.0
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##
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-{ 'type': 'ChardevInfo', 'data': {'label': 'str', 'filename': 'str'} }
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+{ 'type': 'ChardevInfo', 'data': {'label': 'str',
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+ 'filename': 'str',
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+ 'frontend-open': 'bool'} }
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##
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# @query-chardev:
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diff --git a/qemu-char.c b/qemu-char.c
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index 930f3d4..47ac55a 100644
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--- a/qemu-char.c
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+++ b/qemu-char.c
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@@ -3435,6 +3435,7 @@ ChardevInfoList *qmp_query_chardev(Error **errp)
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info->value = g_malloc0(sizeof(*info->value));
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info->value->label = g_strdup(chr->label);
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info->value->filename = g_strdup(chr->filename);
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+ info->value->frontend_open = chr->fe_open;
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info->next = chr_list;
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chr_list = info;
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diff --git a/qmp-commands.hx b/qmp-commands.hx
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index 1d4be84..405275c 100644
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--- a/qmp-commands.hx
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+++ b/qmp-commands.hx
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@@ -1782,19 +1782,28 @@ Each json-object contain the following:
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- "label": device's label (json-string)
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- "filename": device's file (json-string)
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+- "frontend-open": open/closed state of the frontend device attached to this
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+ backend (json-bool)
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Example:
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-> { "execute": "query-chardev" }
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<- {
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- "return":[
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+ "return": [
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+ {
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+ "label": "charchannel0",
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+ "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.agent,server",
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+ "frontend-open": false
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+ },
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{
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- "label":"monitor",
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- "filename":"stdio"
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+ "label": "charmonitor",
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+ "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.monitor,server",
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+ "frontend-open": true
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},
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{
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- "label":"serial0",
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- "filename":"vc"
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+ "label": "charserial0",
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+ "filename": "pty:/dev/pts/2",
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+ "frontend-open": true
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}
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]
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}
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--
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1.7.1
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