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virsh exposure of Network Metadata APIs
Adds two new commands and a new option: - 'net-desc' to show/modify network title and description. - 'net-metadata' to show/modify network metadata. - Option '--title' for 'net-list' to print corresponding network titles in an additional column. - Documentation for all the above. - XML Fallback function `virshNetworkGetXMLFromNet` for title and description for compatibility with hosts running older versions of libvirtd. Signed-off-by: K Shiva Kiran <shiva_kr@riseup.net> Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
K Shiva Kiran
Michal Privoznik
parent
7ab9d1ec88
commit
93d1989a3d
@ -5566,6 +5566,7 @@ to get a description of the XML network format used by libvirt.
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Optionally, the format of the input XML file can be validated against an
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internal RNG schema with *--validate*.
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net-define
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----------
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@ -5581,6 +5582,38 @@ Optionally, the format of the input XML file can be validated against an
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internal RNG schema with *--validate*.
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net-desc
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--------
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**Syntax:**
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::
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net-desc network [[--live] [--config] |
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[--current]] [--title] [--edit] [--new-desc
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New description or title message]
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Show or modify description and title of a network. These values are user
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fields that allow storing arbitrary textual data to allow easy
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identification of networks. Title should be short, although it's not enforced.
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(See also ``net-metadata`` that works with XML based network metadata.)
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Flags *--live* or *--config* select whether this command works on live
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or persistent definitions of the network. If both *--live* and *--config*
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are specified, the *--config* option takes precedence on getting the current
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description and both live configuration and config are updated while setting
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the description. *--current* is exclusive and implied if none of these was
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specified.
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Flag *--edit* specifies that an editor with the contents of current
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description or title should be opened and the contents saved back afterwards.
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Flag *--title* selects operation on the title field instead of description.
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If neither of *--edit* and *--new-desc* are specified the note or description
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is displayed instead of being modified.
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net-destroy
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-----------
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@ -5689,6 +5722,7 @@ net-list
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{ [--table] | --name | --uuid }
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[--persistent] [<--transient>]
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[--autostart] [<--no-autostart>]
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[--title]
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Returns the list of active networks, if *--all* is specified this will also
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include defined but inactive networks, if *--inactive* is specified only the
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@ -5703,12 +5737,55 @@ instead of names. Flag *--table* specifies that the legacy table-formatted
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output should be used. This is the default. All of these are mutually
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exclusive.
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If *--title* is specified, then the short network description (title) is
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printed in an extra column. This flag is usable only with the default
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*--table* output.
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NOTE: When talking to older servers, this command is forced to use a series of
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API calls with an inherent race, where a pool might not be listed or might appear
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more than once if it changed state between calls while the list was being
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collected. Newer servers do not have this problem.
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net-metadata
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------------
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**Syntax:**
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::
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net-metadata network [[--live] [--config] | [--current]]
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[--edit] [uri] [key] [set] [--remove]
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Show or modify custom XML metadata of a network. The metadata is a user
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defined XML that allows storing arbitrary XML data in the network definition.
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Multiple separate custom metadata pieces can be stored in the network XML.
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The pieces are identified by a private XML namespace provided via the
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*uri* argument. (See also ``net-desc`` that works with textual metadata of
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a network, such as title and description.)
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Flags *--live* or *--config* select whether this command works on live
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or persistent definitions of the network. If both *--live* and *--config*
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are specified, the *--config* option takes precedence on getting the current
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description and both live configuration and config are updated while setting
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the description. *--current* is exclusive and implied if none of these was
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specified.
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Flag *--remove* specifies that the metadata element specified by the *uri*
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argument should be removed rather than updated.
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Flag *--edit* specifies that an editor with the metadata identified by the
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*uri* argument should be opened and the contents saved back afterwards.
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Otherwise the new contents can be provided via the *set* argument.
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When setting metadata via *--edit* or *set* the *key* argument must be
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specified and is used to prefix the custom elements to bind them
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to the private namespace.
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If neither of *--edit* and *set* are specified the XML metadata corresponding
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to the *uri* namespace is displayed instead of being modified.
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net-name
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--------
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@ -330,6 +330,352 @@ cmdNetworkDestroy(vshControl *ctl, const vshCmd *cmd)
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return ret;
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}
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/*
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* "net-desc" command
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*/
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static const vshCmdInfo info_network_desc[] = {
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{.name = "help",
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.data = N_("show or set network's description or title")
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},
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{.name = "desc",
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.data = N_("Allows setting or modifying the description or title of a network.")
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},
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{.name = NULL}
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};
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static const vshCmdOptDef opts_network_desc[] = {
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VIRSH_COMMON_OPT_NETWORK_FULL(0),
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VIRSH_COMMON_OPT_LIVE(N_("modify/get running state")),
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VIRSH_COMMON_OPT_CONFIG(N_("modify/get persistent configuration")),
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VIRSH_COMMON_OPT_CURRENT(N_("modify/get current state configuration")),
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{.name = "title",
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.type = VSH_OT_BOOL,
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.help = N_("modify/get the title instead of description")
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},
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{.name = "edit",
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.type = VSH_OT_BOOL,
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.help = N_("open an editor to modify the description")
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},
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{.name = "new-desc",
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.type = VSH_OT_ARGV,
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.help = N_("message")
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},
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{.name = NULL}
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};
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/* extract description or title from network xml */
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static char *
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virshGetNetworkDescription(vshControl *ctl, virNetworkPtr net,
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bool title, unsigned int flags)
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{
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char *desc = NULL;
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g_autoptr(xmlDoc) doc = NULL;
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g_autoptr(xmlXPathContext) ctxt = NULL;
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int type;
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if (title)
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type = VIR_NETWORK_METADATA_TITLE;
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else
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type = VIR_NETWORK_METADATA_DESCRIPTION;
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if ((desc = virNetworkGetMetadata(net, type, NULL, flags))) {
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return desc;
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} else {
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int errCode = virGetLastErrorCode();
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if (errCode == VIR_ERR_NO_NETWORK_METADATA) {
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desc = g_strdup("");
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vshResetLibvirtError();
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return desc;
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}
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if (errCode != VIR_ERR_NO_SUPPORT)
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return desc;
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}
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/* fall back to xml */
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if (virshNetworkGetXMLFromNet(ctl, net, flags, &doc, &ctxt) < 0)
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return NULL;
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if (title)
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desc = virXPathString("string(./title[1])", ctxt);
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else
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desc = virXPathString("string(./description[1])", ctxt);
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if (!desc)
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desc = g_strdup("");
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return desc;
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}
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static bool
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cmdNetworkDesc(vshControl *ctl, const vshCmd *cmd)
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{
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g_autoptr(virshNetwork) net = NULL;
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bool config = vshCommandOptBool(cmd, "config");
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bool live = vshCommandOptBool(cmd, "live");
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bool current = vshCommandOptBool(cmd, "current");
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bool title = vshCommandOptBool(cmd, "title");
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bool edit = vshCommandOptBool(cmd, "edit");
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int type;
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g_autofree char *descArg = NULL;
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const vshCmdOpt *opt = NULL;
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g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
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unsigned int flags = VIR_NETWORK_UPDATE_AFFECT_CURRENT;
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unsigned int queryflags = 0;
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VSH_EXCLUSIVE_OPTIONS_VAR(current, live);
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VSH_EXCLUSIVE_OPTIONS_VAR(current, config);
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if (config) {
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flags |= VIR_NETWORK_UPDATE_AFFECT_CONFIG;
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queryflags |= VIR_NETWORK_XML_INACTIVE;
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}
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if (live)
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flags |= VIR_NETWORK_UPDATE_AFFECT_LIVE;
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if (!(net = virshCommandOptNetwork(ctl, cmd, NULL)))
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return false;
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if (title)
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type = VIR_NETWORK_METADATA_TITLE;
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else
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type = VIR_NETWORK_METADATA_DESCRIPTION;
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while ((opt = vshCommandOptArgv(ctl, cmd, opt)))
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virBufferAsprintf(&buf, "%s ", opt->data);
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virBufferTrim(&buf, " ");
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descArg = virBufferContentAndReset(&buf);
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if (edit || descArg) {
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g_autofree char *descNet = NULL;
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g_autofree char *descNew = NULL;
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if (!(descNet = virshGetNetworkDescription(ctl, net, title, queryflags)))
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return false;
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if (!descArg)
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descArg = g_strdup(descNet);
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if (edit) {
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g_autoptr(vshTempFile) tmp = NULL;
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g_autofree char *desc_edited = NULL;
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char *tmpstr;
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/* Create and open the temporary file. */
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if (!(tmp = vshEditWriteToTempFile(ctl, descArg)))
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return false;
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/* Start the editor. */
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if (vshEditFile(ctl, tmp) == -1)
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return false;
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/* Read back the edited file. */
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if (!(desc_edited = vshEditReadBackFile(ctl, tmp)))
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return false;
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/* strip a possible newline at the end of file; some
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* editors enforce a newline, this makes editing the title
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* more convenient */
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if (title &&
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(tmpstr = strrchr(desc_edited, '\n')) &&
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*(tmpstr+1) == '\0')
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*tmpstr = '\0';
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/* Compare original XML with edited. Has it changed at all? */
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if (STREQ(descNet, desc_edited)) {
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if (title)
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vshPrintExtra(ctl, "%s", _("Network title not changed\n"));
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else
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vshPrintExtra(ctl, "%s", _("Network description not changed\n"));
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return true;
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}
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descNew = g_steal_pointer(&desc_edited);
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} else {
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descNew = g_steal_pointer(&descArg);
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}
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if (virNetworkSetMetadata(net, type, descNew, NULL, NULL, flags) < 0) {
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if (title)
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vshError(ctl, "%s", _("Failed to set new network title"));
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else
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vshError(ctl, "%s", _("Failed to set new network description"));
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return false;
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}
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if (title)
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vshPrintExtra(ctl, "%s", _("Network title updated successfully"));
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else
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vshPrintExtra(ctl, "%s", _("Network description updated successfully"));
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} else {
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g_autofree char *desc = virshGetNetworkDescription(ctl, net, title, queryflags);
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if (!desc)
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return false;
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if (strlen(desc) > 0) {
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vshPrint(ctl, "%s", desc);
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} else {
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if (title)
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vshPrintExtra(ctl, _("No title for network: %1$s"), virNetworkGetName(net));
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else
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vshPrintExtra(ctl, _("No description for network: %1$s"), virNetworkGetName(net));
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}
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}
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return true;
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}
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/*
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* "net-metadata" command
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*/
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static const vshCmdInfo info_network_metadata[] = {
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{.name = "help",
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.data = N_("show or set network's custom XML metadata")
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},
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{.name = "desc",
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.data = N_("Shows or modifies the XML metadata of a network.")
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},
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{.name = NULL}
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};
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static const vshCmdOptDef opts_network_metadata[] = {
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VIRSH_COMMON_OPT_NETWORK_FULL(0),
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{.name = "uri",
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.type = VSH_OT_DATA,
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.flags = VSH_OFLAG_REQ,
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.help = N_("URI of the namespace")
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},
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VIRSH_COMMON_OPT_LIVE(N_("modify/get running state")),
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VIRSH_COMMON_OPT_CONFIG(N_("modify/get persistent configuration")),
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VIRSH_COMMON_OPT_CURRENT(N_("modify/get current state configuration")),
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{.name = "edit",
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.type = VSH_OT_BOOL,
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.help = N_("use an editor to change the metadata")
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},
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{.name = "key",
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.type = VSH_OT_STRING,
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.help = N_("key to be used as a namespace identifier"),
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},
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{.name = "set",
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.type = VSH_OT_STRING,
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.completer = virshCompleteEmpty,
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.help = N_("new metadata to set"),
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},
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{.name = "remove",
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.type = VSH_OT_BOOL,
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.help = N_("remove the metadata corresponding to an uri")
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},
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{.name = NULL}
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};
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/* helper to add new metadata using the --edit option */
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static char *
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virshNetworkGetEditMetadata(vshControl *ctl G_GNUC_UNUSED,
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virNetworkPtr net,
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const char *uri,
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unsigned int flags)
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{
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char *ret;
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if (!(ret = virNetworkGetMetadata(net, VIR_NETWORK_METADATA_ELEMENT,
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uri, flags))) {
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vshResetLibvirtError();
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ret = g_strdup("\n");
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}
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return ret;
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}
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static bool
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cmdNetworkMetadata(vshControl *ctl, const vshCmd *cmd)
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{
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g_autoptr(virshNetwork) net = NULL;
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g_autoptr(xmlXPathContext) ctxt = NULL;
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bool config = vshCommandOptBool(cmd, "config");
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bool live = vshCommandOptBool(cmd, "live");
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bool current = vshCommandOptBool(cmd, "current");
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bool edit = vshCommandOptBool(cmd, "edit");
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bool rem = vshCommandOptBool(cmd, "remove");
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const char *set = NULL;
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const char *uri = NULL;
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const char *key = NULL;
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unsigned int flags = VIR_NETWORK_UPDATE_AFFECT_CURRENT;
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bool ret = false;
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VSH_EXCLUSIVE_OPTIONS_VAR(current, live);
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VSH_EXCLUSIVE_OPTIONS_VAR(current, config);
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VSH_EXCLUSIVE_OPTIONS("edit", "set");
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VSH_EXCLUSIVE_OPTIONS("remove", "set");
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VSH_EXCLUSIVE_OPTIONS("remove", "edit");
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if (config)
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flags |= VIR_NETWORK_UPDATE_AFFECT_CONFIG;
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if (live)
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flags |= VIR_NETWORK_UPDATE_AFFECT_LIVE;
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if (!(net = virshCommandOptNetwork(ctl, cmd, NULL)))
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return false;
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if (vshCommandOptStringReq(ctl, cmd, "uri", &uri) < 0 ||
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vshCommandOptStringReq(ctl, cmd, "key", &key) < 0 ||
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vshCommandOptStringReq(ctl, cmd, "set", &set) < 0)
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return false;
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if ((set || edit) && !key) {
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vshError(ctl, "%s",
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_("namespace key is required when modifying metadata"));
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return false;
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}
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if (set || rem) {
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if (virNetworkSetMetadata(net, VIR_NETWORK_METADATA_ELEMENT,
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set, key, uri, flags))
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return false;
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if (rem)
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vshPrintExtra(ctl, "%s\n", _("Metadata removed"));
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else
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vshPrintExtra(ctl, "%s\n", _("Metadata modified"));
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} else if (edit) {
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#define EDIT_GET_XML \
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virshNetworkGetEditMetadata(ctl, net, uri, flags)
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#define EDIT_NOT_CHANGED \
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do { \
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vshPrintExtra(ctl, "%s", _("Metadata not changed")); \
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ret = true; \
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goto edit_cleanup; \
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} while (0)
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#define EDIT_DEFINE \
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(virNetworkSetMetadata(net, VIR_NETWORK_METADATA_ELEMENT, doc_edited, \
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key, uri, flags) == 0)
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#include "virsh-edit.c"
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vshPrintExtra(ctl, "%s\n", _("Metadata modified"));
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} else {
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g_autofree char *data = NULL;
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g_autoptr(xmlDoc) doc = NULL;
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/* get */
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if (!(data = virNetworkGetMetadata(net, VIR_NETWORK_METADATA_ELEMENT,
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uri, flags)))
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return false;
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vshPrint(ctl, "%s\n", data);
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}
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ret = true;
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cleanup:
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return ret;
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}
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/*
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* "net-dumpxml" command
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*/
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@ -708,6 +1054,10 @@ static const vshCmdOptDef opts_network_list[] = {
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.type = VSH_OT_BOOL,
|
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.help = N_("list table (default)")
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},
|
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{.name = "title",
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.type = VSH_OT_BOOL,
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.help = N_("show network title")
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},
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{.name = NULL}
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};
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@ -721,6 +1071,7 @@ cmdNetworkList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
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size_t i;
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bool ret = false;
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bool optName = vshCommandOptBool(cmd, "name");
|
||||
bool optTitle = vshCommandOptBool(cmd, "title");
|
||||
bool optTable = vshCommandOptBool(cmd, "table");
|
||||
bool optUUID = vshCommandOptBool(cmd, "uuid");
|
||||
char uuid[VIR_UUID_STRING_BUFLEN];
|
||||
@ -754,8 +1105,12 @@ cmdNetworkList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
|
||||
return false;
|
||||
|
||||
if (optTable) {
|
||||
table = vshTableNew(_("Name"), _("State"), _("Autostart"),
|
||||
_("Persistent"), NULL);
|
||||
if (optTitle)
|
||||
table = vshTableNew(_("Name"), _("State"), _("Autostart"),
|
||||
_("Persistent"), _("Title"), NULL);
|
||||
else
|
||||
table = vshTableNew(_("Name"), _("State"), _("Autostart"),
|
||||
_("Persistent"), NULL);
|
||||
if (!table)
|
||||
goto cleanup;
|
||||
}
|
||||
@ -771,16 +1126,37 @@ cmdNetworkList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
|
||||
else
|
||||
autostartStr = is_autostart ? _("yes") : _("no");
|
||||
|
||||
if (vshTableRowAppend(table,
|
||||
virNetworkGetName(network),
|
||||
virNetworkIsActive(network) ?
|
||||
_("active") : _("inactive"),
|
||||
autostartStr,
|
||||
virNetworkIsPersistent(network) ?
|
||||
_("yes") : _("no"),
|
||||
NULL) < 0)
|
||||
goto cleanup;
|
||||
if (optTitle) {
|
||||
g_autofree char *title = NULL;
|
||||
|
||||
if (!(title = virshGetNetworkDescription(ctl, network, true, 0)))
|
||||
goto cleanup;
|
||||
if (vshTableRowAppend(table,
|
||||
virNetworkGetName(network),
|
||||
virNetworkIsActive(network) ?
|
||||
_("active") : _("inactive"),
|
||||
autostartStr,
|
||||
virNetworkIsPersistent(network) ?
|
||||
_("yes") : _("no"),
|
||||
title,
|
||||
NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
} else {
|
||||
if (vshTableRowAppend(table,
|
||||
virNetworkGetName(network),
|
||||
virNetworkIsActive(network) ?
|
||||
_("active") : _("inactive"),
|
||||
autostartStr,
|
||||
virNetworkIsPersistent(network) ?
|
||||
_("yes") : _("no"),
|
||||
NULL) < 0)
|
||||
goto cleanup;
|
||||
|
||||
}
|
||||
|
||||
} else if (optUUID) {
|
||||
|
||||
if (virNetworkGetUUIDString(network, uuid) < 0) {
|
||||
vshError(ctl, "%s", _("Failed to get network's UUID"));
|
||||
goto cleanup;
|
||||
@ -1825,6 +2201,12 @@ const vshCmdDef networkCmds[] = {
|
||||
.info = info_network_define,
|
||||
.flags = 0
|
||||
},
|
||||
{.name = "net-desc",
|
||||
.handler = cmdNetworkDesc,
|
||||
.opts = opts_network_desc,
|
||||
.info = info_network_desc,
|
||||
.flags = 0
|
||||
},
|
||||
{.name = "net-destroy",
|
||||
.handler = cmdNetworkDestroy,
|
||||
.opts = opts_network_destroy,
|
||||
@ -1867,6 +2249,12 @@ const vshCmdDef networkCmds[] = {
|
||||
.info = info_network_list,
|
||||
.flags = 0
|
||||
},
|
||||
{.name = "net-metadata",
|
||||
.handler = cmdNetworkMetadata,
|
||||
.opts = opts_network_metadata,
|
||||
.info = info_network_metadata,
|
||||
.flags = 0
|
||||
},
|
||||
{.name = "net-name",
|
||||
.handler = cmdNetworkName,
|
||||
.opts = opts_network_name,
|
||||
|
||||
@ -398,6 +398,31 @@ virshDomainGetXMLFromDom(vshControl *ctl,
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
virshNetworkGetXMLFromNet(vshControl *ctl,
|
||||
virNetworkPtr net,
|
||||
unsigned int flags,
|
||||
xmlDocPtr *xml,
|
||||
xmlXPathContextPtr *ctxt)
|
||||
{
|
||||
g_autofree char *desc = NULL;
|
||||
|
||||
if (!(desc = virNetworkGetXMLDesc(net, flags))) {
|
||||
vshError(ctl, _("Failed to get network description xml"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
*xml = virXMLParseStringCtxt(desc, _("(network_definition)"), ctxt);
|
||||
|
||||
if (!(*xml)) {
|
||||
vshError(ctl, _("Failed to parse network description xml"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
virshDomainGetXML(vshControl *ctl,
|
||||
const vshCmd *cmd,
|
||||
|
||||
@ -143,6 +143,15 @@ virshDomainGetXMLFromDom(vshControl *ctl,
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4)
|
||||
ATTRIBUTE_NONNULL(5) G_GNUC_WARN_UNUSED_RESULT;
|
||||
|
||||
int
|
||||
virshNetworkGetXMLFromNet(vshControl *ctl,
|
||||
virNetworkPtr net,
|
||||
unsigned int flags,
|
||||
xmlDocPtr *xml,
|
||||
xmlXPathContextPtr *ctxt)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4)
|
||||
ATTRIBUTE_NONNULL(5) G_GNUC_WARN_UNUSED_RESULT;
|
||||
|
||||
int
|
||||
virshDomainGetXML(vshControl *ctl,
|
||||
const vshCmd *cmd,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user