[libvirt] [PATCH 30/48] list: Use virConnectListAllInterfaces in virsh
Osier Yang
jyang at redhat.com
Fri Aug 3 15:48:33 UTC 2012
tools/virsh-interface.c:
* vshInterfaceSorter to sort interfaces by name
* vshInterfaceListFree to free the interface objects list.
* vshInterfaceListCollect to collect the interface objects, trying
to use new API first, fall back to older APIs if it's not supported.
---
tools/virsh-interface.c | 259 +++++++++++++++++++++++++++++++++--------------
1 files changed, 184 insertions(+), 75 deletions(-)
diff --git a/tools/virsh-interface.c b/tools/virsh-interface.c
index 12019b4..5e70498 100644
--- a/tools/virsh-interface.c
+++ b/tools/virsh-interface.c
@@ -124,6 +124,174 @@ cleanup:
return ret;
}
+static int
+vshInterfaceSorter(const void *a, const void *b)
+{
+ virInterfacePtr *ia = (virInterfacePtr *) a;
+ virInterfacePtr *ib = (virInterfacePtr *) b;
+
+ if (*ia && !*ib)
+ return -1;
+
+ if (!*ia)
+ return *ib != NULL;
+
+ return strcasecmp(virInterfaceGetName(*ia),
+ virInterfaceGetName(*ib));
+}
+
+struct vshInterfaceList {
+ virInterfacePtr *ifaces;
+ size_t nifaces;
+};
+typedef struct vshInterfaceList *vshInterfaceListPtr;
+
+static void
+vshInterfaceListFree(vshInterfaceListPtr list)
+{
+ int i;
+
+ if (list && list->nifaces) {
+ for (i = 0; i < list->nifaces; i++) {
+ if (list->ifaces[i])
+ virInterfaceFree(list->ifaces[i]);
+ }
+ VIR_FREE(list->ifaces);
+ }
+ VIR_FREE(list);
+}
+
+static vshInterfaceListPtr
+vshInterfaceListCollect(vshControl *ctl,
+ unsigned int flags)
+{
+ vshInterfaceListPtr list = vshMalloc(ctl, sizeof(*list));
+ int i;
+ int ret;
+ char **activeNames = NULL;
+ char **inactiveNames = NULL;
+ virInterfacePtr iface;
+ bool success = false;
+ size_t deleted = 0;
+ int nActiveIfaces = 0;
+ int nInactiveIfaces = 0;
+ int nAllIfaces = 0;
+
+ /* try the list with flags support (0.10.0 and later) */
+ if ((ret = virConnectListAllInterfaces(ctl->conn,
+ &list->ifaces,
+ flags)) >= 0) {
+ list->nifaces = ret;
+ goto finished;
+ }
+
+ /* check if the command is actually supported */
+ if (last_error && last_error->code == VIR_ERR_NO_SUPPORT) {
+ vshResetLibvirtError();
+ goto fallback;
+ }
+
+ /* there was an error during the first or second call */
+ vshError(ctl, "%s", _("Failed to list interfaces"));
+ goto cleanup;
+
+
+fallback:
+ /* fall back to old method (0.9.13 and older) */
+ vshResetLibvirtError();
+
+ if (flags & VIR_CONNECT_LIST_INTERFACES_ACTIVE) {
+ nActiveIfaces = virConnectNumOfInterfaces(ctl->conn);
+ if (nActiveIfaces < 0) {
+ vshError(ctl, "%s", _("Failed to list active interfaces"));
+ goto cleanup;
+ }
+ if (nActiveIfaces) {
+ activeNames = vshMalloc(ctl, sizeof(char *) * nActiveIfaces);
+
+ if ((nActiveIfaces = virConnectListInterfaces(ctl->conn, activeNames,
+ nActiveIfaces)) < 0) {
+ vshError(ctl, "%s", _("Failed to list active interfaces"));
+ goto cleanup;
+ }
+ }
+ }
+
+ if (flags & VIR_CONNECT_LIST_INTERFACES_INACTIVE) {
+ nInactiveIfaces = virConnectNumOfDefinedInterfaces(ctl->conn);
+ if (nInactiveIfaces < 0) {
+ vshError(ctl, "%s", _("Failed to list inactive interfaces"));
+ goto cleanup;
+ }
+ if (nInactiveIfaces) {
+ inactiveNames = vshMalloc(ctl, sizeof(char *) * nInactiveIfaces);
+
+ if ((nInactiveIfaces =
+ virConnectListDefinedInterfaces(ctl->conn, inactiveNames,
+ nInactiveIfaces)) < 0) {
+ vshError(ctl, "%s", _("Failed to list inactive interfaces"));
+ goto cleanup;
+ }
+ }
+ }
+
+ nAllIfaces = nActiveIfaces + nInactiveIfaces;
+ if (nAllIfaces == 0) {
+ VIR_FREE(activeNames);
+ VIR_FREE(inactiveNames);
+ return list;
+ }
+
+ list->ifaces = vshMalloc(ctl, sizeof(virInterfacePtr) * (nAllIfaces));
+ list->nifaces = 0;
+
+ /* get active interfaces */
+ for (i = 0; i < nActiveIfaces; i++) {
+ if (!(iface = virInterfaceLookupByName(ctl->conn, activeNames[i])))
+ continue;
+ list->ifaces[list->nifaces++] = iface;
+ }
+
+ /* get inactive interfaces */
+ for (i = 0; i < nInactiveIfaces; i++) {
+ if (!(iface = virInterfaceLookupByName(ctl->conn, inactiveNames[i])))
+ continue;
+ list->ifaces[list->nifaces++] = iface;
+ }
+
+ /* truncate interfaces that weren't found */
+ deleted = nAllIfaces - list->nifaces;
+
+finished:
+ /* sort the list */
+ if (list->ifaces && list->nifaces)
+ qsort(list->ifaces, list->nifaces,
+ sizeof(*list->ifaces), vshInterfaceSorter);
+
+ /* truncate the list if filter simulation deleted entries */
+ if (deleted)
+ VIR_SHRINK_N(list->ifaces, list->nifaces, deleted);
+
+ success = true;
+
+cleanup:
+ for (i = 0; i < nActiveIfaces; i++)
+ VIR_FREE(activeNames[i]);
+
+ for (i = 0; i < nInactiveIfaces; i++)
+ VIR_FREE(inactiveNames[i]);
+
+ VIR_FREE(activeNames);
+ VIR_FREE(inactiveNames);
+
+ if (!success) {
+ vshInterfaceListFree(list);
+ list = NULL;
+ }
+
+ return list;
+}
+
/*
* "iface-list" command
*/
@@ -138,102 +306,43 @@ static const vshCmdOptDef opts_interface_list[] = {
{"all", VSH_OT_BOOL, 0, N_("list inactive & active interfaces")},
{NULL, 0, 0, NULL}
};
+
static bool
cmdInterfaceList(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
bool inactive = vshCommandOptBool(cmd, "inactive");
bool all = vshCommandOptBool(cmd, "all");
- bool active = !inactive || all;
- int maxactive = 0, maxinactive = 0, i;
- char **activeNames = NULL, **inactiveNames = NULL;
- inactive |= all;
+ unsigned int flags = VIR_CONNECT_LIST_INTERFACES_ACTIVE;
+ vshInterfaceListPtr list = NULL;
+ int i;
+
+ if (inactive)
+ flags = VIR_CONNECT_LIST_INTERFACES_INACTIVE;
+ if (all)
+ flags = VIR_CONNECT_LIST_INTERFACES_INACTIVE |
+ VIR_CONNECT_LIST_INTERFACES_ACTIVE;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
- if (active) {
- maxactive = virConnectNumOfInterfaces(ctl->conn);
- if (maxactive < 0) {
- vshError(ctl, "%s", _("Failed to list active interfaces"));
- return false;
- }
- if (maxactive) {
- activeNames = vshMalloc(ctl, sizeof(char *) * maxactive);
-
- if ((maxactive = virConnectListInterfaces(ctl->conn, activeNames,
- maxactive)) < 0) {
- vshError(ctl, "%s", _("Failed to list active interfaces"));
- VIR_FREE(activeNames);
- return false;
- }
-
- qsort(&activeNames[0], maxactive, sizeof(char *), vshNameSorter);
- }
- }
- if (inactive) {
- maxinactive = virConnectNumOfDefinedInterfaces(ctl->conn);
- if (maxinactive < 0) {
- vshError(ctl, "%s", _("Failed to list inactive interfaces"));
- VIR_FREE(activeNames);
- return false;
- }
- if (maxinactive) {
- inactiveNames = vshMalloc(ctl, sizeof(char *) * maxinactive);
-
- if ((maxinactive =
- virConnectListDefinedInterfaces(ctl->conn, inactiveNames,
- maxinactive)) < 0) {
- vshError(ctl, "%s", _("Failed to list inactive interfaces"));
- VIR_FREE(activeNames);
- VIR_FREE(inactiveNames);
- return false;
- }
+ if (!(list = vshInterfaceListCollect(ctl, flags)))
+ return false;
- qsort(&inactiveNames[0], maxinactive, sizeof(char*), vshNameSorter);
- }
- }
vshPrintExtra(ctl, "%-20s %-10s %s\n", _("Name"), _("State"),
_("MAC Address"));
vshPrintExtra(ctl, "--------------------------------------------\n");
- for (i = 0; i < maxactive; i++) {
- virInterfacePtr iface =
- virInterfaceLookupByName(ctl->conn, activeNames[i]);
-
- /* this kind of work with interfaces is not atomic */
- if (!iface) {
- VIR_FREE(activeNames[i]);
- continue;
- }
+ for (i = 0; i < list->nifaces; i++) {
+ virInterfacePtr iface = list->ifaces[i];
vshPrint(ctl, "%-20s %-10s %s\n",
virInterfaceGetName(iface),
- _("active"),
+ virInterfaceIsActive(iface) ? _("active") : _("inactive"),
virInterfaceGetMACString(iface));
- virInterfaceFree(iface);
- VIR_FREE(activeNames[i]);
}
- for (i = 0; i < maxinactive; i++) {
- virInterfacePtr iface =
- virInterfaceLookupByName(ctl->conn, inactiveNames[i]);
-
- /* this kind of work with interfaces is not atomic */
- if (!iface) {
- VIR_FREE(inactiveNames[i]);
- continue;
- }
- vshPrint(ctl, "%-20s %-10s %s\n",
- virInterfaceGetName(iface),
- _("inactive"),
- virInterfaceGetMACString(iface));
- virInterfaceFree(iface);
- VIR_FREE(inactiveNames[i]);
- }
- VIR_FREE(activeNames);
- VIR_FREE(inactiveNames);
+ vshInterfaceListFree(list);
return true;
-
}
/*
--
1.7.7.3
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