[libvirt] [PATCH 2/2] Don't overwrite errors from virNetDevBandwidthSet

[Ján Tomko]

Otherwise this beautiful error would be overwritten when
the function is called with a really high rate number:

2014-07-28 12:51:47.920+0000: 2304: error : virCommandWait:2399 :
internal error: Child process (/sbin/tc class add dev vnet0 parent 1:
classid 1:1 htb rate 4294968kbps) unexpected exit status 1: Illegal "rate"
Usage: ... qdisc add ... htb [default N] [r2q N]
 default  minor id of class to which unclassified packets are sent {0}
 r2q      DRR quantums are computed as rate in Bps/r2q {10}
 debug    string of 16 numbers each 0-3 {0}

... class add ... htb rate R1 [burst B1] [mpu B] [overhead O]
                      [prio P] [slot S] [pslot PS]
                      [ceil R2] [cburst B2] [mtu MTU] [quantum Q]
 rate     rate allocated to this class (class can still borrow)
 burst    max bytes burst which can be accumulated during idle period {computed}
 mpu      minimum packet size used in rate computations
 overhead per-packet size overhead used in rate computations
 linklay  adapting to a linklayer e.g. atm
 ceil     definite upper class rate (no borrows) {rate}
 cburst   burst but for ceil {computed}
 mtu      max packet size we create rate map for {1600}
 prio     priority of leaf; lowe

https://bugzilla.redhat.com/show_bug.cgi?id=1043735
---
 src/lxc/lxc_process.c       | 6 +-----
 src/network/bridge_driver.c | 6 +-----
 src/qemu/qemu_command.c     | 6 +-----
 src/qemu/qemu_driver.c      | 6 +-----
 src/qemu/qemu_hotplug.c     | 6 +-----
 src/util/virnetdevmacvlan.c | 3 ---
 6 files changed, 5 insertions(+), 28 deletions(-)

diff --git a/src/lxc/lxc_process.c b/src/lxc/lxc_process.c
index 4912035..3353dc1 100644
--- a/src/lxc/lxc_process.c
+++ b/src/lxc/lxc_process.c
@@ -276,12 +276,8 @@ char *virLXCProcessSetupInterfaceBridged(virConnectPtr conn,
 
     if (virNetDevBandwidthSet(net->ifname,
                               virDomainNetGetActualBandwidth(net),
-                              false) < 0) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("cannot set bandwidth limits on %s"),
-                       net->ifname);
+                              false) < 0)
         goto cleanup;
-    }
 
     if (net->filter &&
         virDomainConfNWFilterInstantiate(conn, vm->uuid, net) < 0)
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index 6ccc6e2..4a53f8a 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -2080,12 +2080,8 @@ networkStartNetworkVirtual(virNetworkDriverStatePtr driver,
     }
 
     if (virNetDevBandwidthSet(network->def->bridge,
-                              network->def->bandwidth, true) < 0) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("cannot set bandwidth limits on %s"),
-                       network->def->bridge);
+                              network->def->bandwidth, true) < 0)
         goto err5;
-    }
 
     VIR_FREE(macTapIfName);
 
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index beb8ca8..fb8b75f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -382,12 +382,8 @@ qemuNetworkIfaceConnect(virDomainDefPtr def,
 
     if (virNetDevBandwidthSet(net->ifname,
                               virDomainNetGetActualBandwidth(net),
-                              false) < 0) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("cannot set bandwidth limits on %s"),
-                       net->ifname);
+                              false) < 0)
         goto cleanup;
-    }
 
     if (net->filter && net->ifname &&
         virDomainConfNWFilterInstantiate(conn, def->uuid, net) < 0) {
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 704ba39..199858e 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -9966,12 +9966,8 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom,
                    sizeof(*newBandwidth->out));
         }
 
-        if (virNetDevBandwidthSet(net->ifname, newBandwidth, false) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           _("cannot set bandwidth limits on %s"),
-                           device);
+        if (virNetDevBandwidthSet(net->ifname, newBandwidth, false) < 0)
             goto cleanup;
-        }
 
         virNetDevBandwidthFree(net->bandwidth);
         if (newBandwidth->in || newBandwidth->out) {
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 729744c..004b6a4 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2181,12 +2181,8 @@ qemuDomainChangeNet(virQEMUDriverPtr driver,
     if (needBandwidthSet) {
         if (virNetDevBandwidthSet(newdev->ifname,
                                   virDomainNetGetActualBandwidth(newdev),
-                                  false) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           _("cannot set bandwidth limits on %s"),
-                           newdev->ifname);
+                                  false) < 0)
             goto cleanup;
-        }
         needReplaceDevDef = true;
     }
 
diff --git a/src/util/virnetdevmacvlan.c b/src/util/virnetdevmacvlan.c
index cb85b74..054194b 100644
--- a/src/util/virnetdevmacvlan.c
+++ b/src/util/virnetdevmacvlan.c
@@ -922,9 +922,6 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
     }
 
     if (virNetDevBandwidthSet(cr_ifname, bandwidth, false) < 0) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("cannot set bandwidth limits on %s"),
-                       cr_ifname);
         if (withTap)
             VIR_FORCE_CLOSE(rc); /* sets rc to -1 */
         else
-- 
1.8.5.5