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[libvirt] [PATCH] support setting bandwidth from virsh attach-interface



Adds two options, inbound and outbound, to attach-interface to set
bandwidth when attaching interfaces
---
 tools/virsh.c   |   96 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 tools/virsh.pod |    5 ++-
 2 files changed, 98 insertions(+), 3 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index bcf0603..d6c9450 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -59,6 +59,7 @@
 #include "threads.h"
 #include "command.h"
 #include "virkeycode.h"
+#include "network.h"
 
 static char *progname;
 
@@ -11225,15 +11226,49 @@ static const vshCmdOptDef opts_attach_interface[] = {
     {"script", VSH_OT_DATA, 0, N_("script used to bridge network interface")},
     {"model", VSH_OT_DATA, 0, N_("model type")},
     {"persistent", VSH_OT_BOOL, 0, N_("persist interface attachment")},
+    {"inbound", VSH_OT_DATA, VSH_OFLAG_NONE, N_("control domain's incoming traffics")},
+    {"outbound", VSH_OT_DATA, VSH_OFLAG_NONE, N_("control domain's outgoing traffics")},
     {NULL, 0, 0, NULL}
 };
 
+/* parse inbound and outbound which are in the format of
+ * 'average,peak,burst', in which peak and burst are optional,
+ * thus 'average,,burst' and 'average,peak' are also legal. */
+static int parseRateStr(const char *rateStr, virRatePtr rate)
+{
+    char *average = NULL, *peak = NULL, *burst = NULL;
+
+    average = (char *)rateStr;
+    if (!average)
+        return -1;
+    rate->average = atol(average);
+
+    peak = strchr(average, ',');
+    if (peak) {
+        burst = strchr(peak + 1, ',');
+        if (!(burst && (burst - peak == 1))) {
+            if (virStrToLong_ull(peak + 1, &burst, 10, &rate->peak) < 0)
+                return -1;
+        }
+
+        if (burst) {
+            if (virStrToLong_ull(burst + 1, NULL, 10, &rate->burst) < 0)
+                return -1;
+        }
+    }
+
+
+    return 0;
+}
+
 static bool
 cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
 {
     virDomainPtr dom = NULL;
     const char *mac = NULL, *target = NULL, *script = NULL,
-                *type = NULL, *source = NULL, *model = NULL;
+                *type = NULL, *source = NULL, *model = NULL,
+                *inboundStr = NULL, *outboundStr = NULL;
+    virRate inbound, outbound;
     int typ;
     int ret;
     bool functionReturn = false;
@@ -11254,7 +11289,9 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
         vshCommandOptString(cmd, "target", &target) < 0 ||
         vshCommandOptString(cmd, "mac", &mac) < 0 ||
         vshCommandOptString(cmd, "script", &script) < 0 ||
-        vshCommandOptString(cmd, "model", &model) < 0) {
+        vshCommandOptString(cmd, "model", &model) < 0 ||
+        vshCommandOptString(cmd, "inbound", &inboundStr) < 0 ||
+        vshCommandOptString(cmd, "outbound", &outboundStr) < 0) {
         vshError(ctl, "missing argument");
         goto cleanup;
     }
@@ -11270,6 +11307,29 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
         goto cleanup;
     }
 
+    if (inboundStr) {
+        memset(&inbound, 0, sizeof(inbound));
+        if (parseRateStr(inboundStr, &inbound) < 0) {
+            vshError(ctl, _("inbound format is incorrect"));
+            goto cleanup;
+        }
+        if (inbound.average == 0) {
+            vshError(ctl, _("inbound average is mandatory"));
+            goto cleanup;
+        }
+    }
+    if (outboundStr) {
+        memset(&outbound, 0, sizeof(outbound));
+        if (parseRateStr(outboundStr, &outbound) < 0) {
+            vshError(ctl, _("outbound format is incorrect"));
+            goto cleanup;
+        }
+        if (outbound.average == 0) {
+            vshError(ctl, _("outbound average is mandatory"));
+            goto cleanup;
+        }
+    }
+
     /* Make XML of interface */
     virBufferAsprintf(&buf, "<interface type='%s'>\n", type);
 
@@ -11287,6 +11347,38 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
     if (model != NULL)
         virBufferAsprintf(&buf, "  <model type='%s'/>\n", model);
 
+    if (inboundStr || outboundStr) {
+        virBufferAsprintf(&buf, "  <bandwidth>\n");
+        if (inboundStr && inbound.average > 0) {
+            if (inbound.peak > 0 && inbound.burst > 0)
+                virBufferAsprintf(&buf, "    <inbound average='%lld' peak='%lld' burst='%lld'/>\n",
+                                  inbound.average, inbound.peak, inbound.burst);
+            else if (inbound.peak > 0)
+                virBufferAsprintf(&buf, "    <inbound average='%lld' peak='%lld'/>\n",
+                                  inbound.average, inbound.peak);
+            else if (inbound.burst > 0)
+                virBufferAsprintf(&buf, "    <inbound average='%lld' burst='%lld'/>\n",
+                                  inbound.average, inbound.burst);
+            else
+                virBufferAsprintf(&buf, "    <inbound average='%lld'/>\n", inbound.average);
+        }
+        if (outboundStr && outbound.average > 0) {
+            if (outbound.peak > 0 && outbound.burst > 0)
+                virBufferAsprintf(&buf, "    <outbound average='%lld' peak='%lld' burst='%lld'/>\n",
+                                  outbound.average, outbound.peak, outbound.burst);
+            else if (outbound.peak > 0)
+                virBufferAsprintf(&buf, "    <outbound average='%lld' peak='%lld'/>\n",
+                                  outbound.average, outbound.peak);
+            else if (outbound.burst > 0)
+                virBufferAsprintf(&buf, "    <outbound average='%lld' burst='%lld'/>\n",
+                                  outbound.average, outbound.burst);
+            else
+                virBufferAsprintf(&buf, "    <outbound average='%lld'/>\n", outbound.average);
+
+        }
+        virBufferAsprintf(&buf, "  </bandwidth>\n");
+    }
+
     virBufferAddLit(&buf, "</interface>\n");
 
     if (virBufferError(&buf)) {
diff --git a/tools/virsh.pod b/tools/virsh.pod
index d0b7937..06dc06a 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1235,7 +1235,7 @@ scsi:controller.bus.unit or ide:controller.bus.unit.
 
 =item B<attach-interface> I<domain-id> I<type> I<source>
 [I<--target target>] [I<--mac mac>] [I<--script script>] [I<--model model>]
-[I<--persistent>]
+[I<--persistent>] [I<--inbound average,peak,burst>] [I<--outbound average,peak,burst>]
 
 Attach a new network interface to the domain.
 I<type> can be either I<network> to indicate a physical network device or I<bridge> to indicate a bridge to a device.
@@ -1246,6 +1246,9 @@ I<script> allows to specify a path to a script handling a bridge instead of
 the default one.
 I<model> allows to specify the model type.
 I<persistent> indicates the changes will affect the next boot of the domain.
+I<inbound> and I<outbound> control the bandwidth of the interface. I<peak>
+and I<burst> are optional, so "average,peak", "average,,burst" and
+"average" are also legal.
 
 B<Note>: the optional target value is the name of a device to be created
 as the back-end on the node. If not provided a device named "vnetN" or "vifN"
-- 
1.7.3.1


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