[Libvirt-cim] [PATCH] Network QoS Patch2
Gareth S Bestor
bestor at us.ibm.com
Fri Dec 30 12:54:38 UTC 2011
From: Gareth S. Bestor <bestor at us.ibm.com>
This patch updates the earlier patch to libvirt-cim for network bandwidth QOS
support. Previous patch had to perform all external host 'tc' (traffic control)
commands from within libvirt-cim providers, because earlier versions of
libvirt lacked native QoS support. libvirt 0.9.4 added native QoS support;
this new patch for libvirt-cim removes earlier QoS hacks in favor of directly
exploiting libvirt equivalent QoS function and configuration. Note, libvirt
supports three tunables for network bandwidth QoS: average, peak and burst,
for both inbound and outbound traffic independently.
This revised libvirt-cim patch only exposes - as previously - inbound traffic
QoS, but adds peak to previous average tunable support.
Selection of earlier (libvirt-cim QoS hack) vs latter (native libvirt QoS)
is done at compile-time based on libvirt version being built against.
As previously, QoS capabilites are exposed on the virtual network pool, and
the QoS setting for a specific guest's NIC are exposed on the associated
network device RASD. QoS settings may be specified during guest creation
(DefineSystem) or guest modification (ModifyResourceSettings).
Signed-off-by: Gareth S. Bestor <bestor at us.ibm.com>
---
libxkutil/device_parsing.c | 34 +++++++++++++++++++++
libxkutil/device_parsing.h | 2 +
libxkutil/xmlgen.c | 39 ++++++++++++++++++++++++
src/Virt_RASD.c | 33 ++++++++++++++++++--
src/Virt_SettingsDefineCapabilities.c | 47 +++++++++++++++++++++++++----
src/Virt_VirtualSystemManagementService.c | 22 +++++++++++++-
6 files changed, 166 insertions(+), 11 deletions(-)
diff --git a/libxkutil/device_parsing.c b/libxkutil/device_parsing.c
index 371838f..7eaa63e 100644
--- a/libxkutil/device_parsing.c
+++ b/libxkutil/device_parsing.c
@@ -444,7 +444,39 @@ static int parse_net_device(xmlNode *inode, struct virt_device **vdevs)
ndev->filter_ref = get_attr_value(child, "filter");
} else if (XSTREQ(child->name, "virtualport")) {
parse_vsi_device(child, ndev);
+#if LIBVIR_VERSION_NUMBER >= 9000
+ } else if (XSTREQ(child->name, "bandwidth")) {
+ /* Network QoS bandwidth support */
+ xmlNode *grandchild = NULL;
+ for (grandchild = child->children;
+ grandchild != NULL;
+ grandchild = grandchild->next) {
+ if (XSTREQ(grandchild->name, "inbound")) {
+ /* Only expose inbound bandwidth */
+ char *val;
+
+ val = get_attr_value(grandchild,
+ "average");
+ if (val != NULL) {
+ sscanf(val, "%" PRIu64,
+ &ndev->reservation);
+ free(val);
+ } else
+ ndev->reservation = 0;
+
+ val = get_attr_value(grandchild,
+ "peak");
+ if (val != NULL) {
+ sscanf(val, "%" PRIu64,
+ &ndev->limit);
+ free(val);
+ } else
+ ndev->limit = 0;
+ break;
+ }
+ }
}
+#endif
}
@@ -861,6 +893,8 @@ struct virt_device *virt_device_dup(struct virt_device *_dev)
DUP_FIELD(dev, _dev, dev.net.vsi.instance_id);
DUP_FIELD(dev, _dev, dev.net.vsi.filter_ref);
DUP_FIELD(dev, _dev, dev.net.vsi.profile_id);
+ dev->dev.net.reservation = _dev->dev.net.reservation;
+ dev->dev.net.limit = _dev->dev.net.limit;
} else if (dev->type == CIM_RES_TYPE_DISK) {
DUP_FIELD(dev, _dev, dev.disk.type);
DUP_FIELD(dev, _dev, dev.disk.device);
diff --git a/libxkutil/device_parsing.h b/libxkutil/device_parsing.h
index ab104d9..f24268b 100644
--- a/libxkutil/device_parsing.h
+++ b/libxkutil/device_parsing.h
@@ -66,6 +66,8 @@ struct net_device {
char *device;
char *net_mode;
char *filter_ref;
+ uint64_t reservation;
+ uint64_t limit;
struct vsi_device vsi;
};
diff --git a/libxkutil/xmlgen.c b/libxkutil/xmlgen.c
index aae1e51..638cffe 100644
--- a/libxkutil/xmlgen.c
+++ b/libxkutil/xmlgen.c
@@ -320,6 +320,45 @@ static const char *net_xml(xmlNodePtr root, struct domain *dominfo)
BAD_CAST net->filter_ref);
}
+#if LIBVIR_VERSION_NUMBER >= 9000
+ /* Network QoS settings saved under <bandwidth> XML section */
+ if (net->reservation || net->limit) {
+ int ret;
+ char *string = NULL;
+
+ tmp = xmlNewChild(nic, NULL,
+ BAD_CAST "bandwidth", NULL);
+ if (tmp == NULL)
+ return XML_ERROR;
+
+ /* Set inbound bandwidth from Reservation & Limit */
+ tmp = xmlNewChild(tmp, NULL,
+ BAD_CAST "inbound", NULL);
+ if (tmp == NULL)
+ return XML_ERROR;
+
+ if (net->reservation) {
+ ret = asprintf(&string, "%" PRIu64,
+ net->reservation);
+ if (ret == -1)
+ return XML_ERROR;
+ xmlNewProp(tmp, BAD_CAST "average",
+ BAD_CAST string);
+ free(string);
+ }
+
+ if (net->limit) {
+ ret = asprintf(&string, "%" PRIu64,
+ net->limit);
+ if (ret == -1)
+ return XML_ERROR;
+ xmlNewProp(tmp, BAD_CAST "peak",
+ BAD_CAST string);
+ free(string);
+ }
+ }
+#endif
+
if (STREQ(dev->dev.net.type, "network"))
msg = set_net_source(nic, net, "network");
else if (STREQ(dev->dev.net.type, "bridge"))
diff --git a/src/Virt_RASD.c b/src/Virt_RASD.c
index e148674..a868c21 100644
--- a/src/Virt_RASD.c
+++ b/src/Virt_RASD.c
@@ -39,6 +39,7 @@
#include "svpc_types.h"
#include "Virt_Device.h"
+#if LIBVIR_VERSION_NUMBER < 9000
/* Network QoS support */
#define QOSCMD_MAC2BANDWIDTH "_ROOT=$(tc class show dev %s | awk '($4==\"root\")\
{print $3}')\n _ID=$(tc filter show dev %s | awk 'BEGIN {RS=\"\\nfilter\"} (NR>2)\
@@ -48,6 +49,7 @@ m1,m2,m3,m4,m5,m6,$18)}' | awk -v mm=%s '($1==mm){print $2}')\n \
if [[ -n \"$_ID\" ]]; then\n tc class show dev %s | awk -v rr=$_ROOT -v id=$_ID \
'($4==\"parent\" && $5==rr && $3==id){print \
substr($13,1,(index($13,\"Kbit\")-1))}'\n fi\n"
+#endif
const static CMPIBroker *_BROKER;
@@ -463,11 +465,7 @@ static CMPIStatus set_net_rasd_params(const CMPIBroker *broker,
const struct virt_device *dev,
CMPIInstance *inst)
{
- FILE *pipe = NULL;
- char *cmd = NULL;
- uint64_t val = 0;
CMPIStatus s = {CMPI_RC_OK, NULL};
- int i;
CMSetProperty(inst,
"NetworkType",
@@ -485,8 +483,14 @@ static CMPIStatus set_net_rasd_params(const CMPIBroker *broker,
(CMPIValue *)dev->dev.net.source,
CMPI_chars);
+#if LIBVIR_VERSION_NUMBER < 9000
/* Network QoS support */
if ((dev->dev.net.mac != NULL) && (dev->dev.net.source != NULL)) {
+ FILE *pipe = NULL;
+ char *cmd = NULL;
+ uint64_t val = 0;
+ int i;
+
/* Get tc performance class bandwidth for this MAC addr */
i = asprintf(&cmd, QOSCMD_MAC2BANDWIDTH, dev->dev.net.source,
dev->dev.net.source,
@@ -511,6 +515,25 @@ static CMPIStatus set_net_rasd_params(const CMPIBroker *broker,
}
free(cmd);
}
+#else
+ if (dev->dev.net.reservation) {
+ CMSetProperty(inst,
+ "Reservation",
+ (CMPIValue *)&(dev->dev.net.reservation),
+ CMPI_uint64);
+
+ if (dev->dev.net.limit)
+ CMSetProperty(inst,
+ "Limit",
+ (CMPIValue *)&(dev->dev.net.limit),
+ CMPI_uint64);
+
+ CMSetProperty(inst,
+ "AllocationUnits",
+ (CMPIValue *)"KiloBytes per Second",
+ CMPI_chars);
+ }
+#endif
if ((dev->dev.net.source != NULL) &&
(STREQ(dev->dev.net.type, "direct")))
@@ -543,7 +566,9 @@ static CMPIStatus set_net_rasd_params(const CMPIBroker *broker,
(CMPIValue *)dev->dev.net.poolid,
CMPI_chars);
+#if LIBVIR_VERSION_NUMBER < 9000
out:
+#endif
return s;
}
diff --git a/src/Virt_SettingsDefineCapabilities.c b/src/Virt_SettingsDefineCapabilities.c
index 129749e..660103a 100644
--- a/src/Virt_SettingsDefineCapabilities.c
+++ b/src/Virt_SettingsDefineCapabilities.c
@@ -74,9 +74,11 @@ const static CMPIBroker *_BROKER;
#define NEW_VOL_RASD 2
/* QoS Network support */
+#if LIBVIR_VERSION_NUMBER < 9000
#define QOSCMD_LISTCLASSES "_ROOT=$(tc class show dev %s | awk '($4==\"root\")\
{print $3}')\n tc class show dev %s | awk -v rr=$_ROOT \
'($4==\"parent\" && $5==rr){print $3\" \"$13}'\n"
+#endif
static bool system_has_vt(virConnectPtr conn)
{
@@ -567,6 +569,8 @@ static CMPIStatus set_net_props(int type,
const char *net_type,
const char *net_name,
uint64_t num_nics,
+ uint64_t reservation,
+ uint64_t limit,
const char *device,
const char *src_dev,
const char *net_mode,
@@ -594,6 +598,21 @@ static CMPIStatus set_net_props(int type,
CMSetProperty(inst, "VirtualQuantity",
(CMPIValue *)&num_nics, CMPI_uint64);
+#if LIBVIR_VERSION_NUMBER >= 9000
+ /* Network QoS support for later libvirt versions */
+ if (reservation)
+ CMSetProperty(inst, "Reservation",
+ (CMPIValue *)&reservation, CMPI_uint64);
+
+ if (limit)
+ CMSetProperty(inst, "Limit",
+ (CMPIValue *)&reservation, CMPI_uint64);
+
+ if (reservation || limit)
+ CMSetProperty(inst, "AllocationUnits",
+ (CMPIValue *)"KiloBytes per Second", CMPI_chars);
+#endif
+
if (device != NULL)
CMSetProperty(inst, "VirtualDevice",
(CMPIValue *)device, CMPI_chars);
@@ -647,6 +666,8 @@ static CMPIStatus net_template(const CMPIObjectPath *ref,
{
bool ret;
uint64_t num_nics;
+ uint64_t reservation = 0;
+ uint64_t limit = 0;
const char *id;
CMPIStatus s = {CMPI_RC_OK, NULL};
int i,j;
@@ -658,16 +679,21 @@ static CMPIStatus net_template(const CMPIObjectPath *ref,
switch (template_type) {
case SDC_RASD_MIN:
num_nics = 0;
+ reservation = 1;
+ limit = 1;
id = "Minimum";
break;
case SDC_RASD_MAX:
ret = get_max_nics(ref, &num_nics, &s);
if (!ret)
goto out;
+ /* No apparant maximum reservation or limit QoS setting in libvirt! */
id = "Maximum";
break;
case SDC_RASD_INC:
num_nics = 1;
+ reservation = 1;
+ limit = 1;
id = "Increment";
break;
case SDC_RASD_DEF:
@@ -689,7 +715,9 @@ static CMPIStatus net_template(const CMPIObjectPath *ref,
id,
type[i],
name[i],
- num_nics,
+ num_nics,
+ reservation,
+ limit,
device[j],
NULL,
NULL,
@@ -707,22 +735,26 @@ static CMPIStatus net_template(const CMPIObjectPath *ref,
}
s = set_net_props(template_type, ref, id, "direct", NULL,
- num_nics, NULL, "eth1", "vepa", NULL,
+ num_nics, reservation, limit,
+ NULL, "eth1", "vepa", NULL,
NULL, NULL, NULL, NULL, NULL, NULL, list);
/* profile id*/
s = set_net_props(template_type, ref, id, "direct", NULL,
- num_nics, NULL, "eth1", "vepa", NULL,
+ num_nics, reservation, limit,
+ NULL, "eth1", "vepa", NULL,
"802.1Qbh", NULL, NULL, NULL,
NULL, "my_profile", list);
/* no profile id but with instance id*/
s = set_net_props(template_type, ref, id, "direct", NULL,
- num_nics, NULL, "eth1", "vepa", NULL,
+ num_nics, reservation, limit,
+ NULL, "eth1", "vepa", NULL,
"802.1Qbg", "managerid", "typeid",
"typeidversion", "instanceid", NULL,
list);
/* no profile id and no instance id*/
s = set_net_props(template_type, ref, id, "direct", NULL,
- num_nics, NULL, "eth1", "vepa", NULL,
+ num_nics, reservation, limit,
+ NULL, "eth1", "vepa", NULL,
"802.1Qbg", "managerid", "typeid",
"typeidversion", "NULL", "NULL", list);
@@ -814,6 +846,7 @@ static CMPIStatus set_net_pool_props(const CMPIObjectPath *ref,
return s;
}
+#if LIBVIR_VERSION_NUMBER < 9000
static char * get_bridge_name(virConnectPtr conn, const char *name)
{
char *bridge = NULL;
@@ -913,7 +946,7 @@ static CMPIStatus qos_hack(
return s;
}
-
+#endif
static CMPIStatus net_pool_template(const CMPIObjectPath *ref,
int template_type,
@@ -2086,8 +2119,10 @@ static CMPIStatus sdc_rasds_for_type(const CMPIObjectPath *ref,
}
}
+#if LIBVIR_VERSION_NUMBER < 9000
if (type == CIM_RES_TYPE_NET)
s = qos_hack(ref, list);
+#endif
out:
return s;
diff --git a/src/Virt_VirtualSystemManagementService.c b/src/Virt_VirtualSystemManagementService.c
index 0141515..4e16b81 100644
--- a/src/Virt_VirtualSystemManagementService.c
+++ b/src/Virt_VirtualSystemManagementService.c
@@ -68,6 +68,7 @@
#define RASD_IND_DELETED "ResourceAllocationSettingDataDeletedIndication"
#define RASD_IND_MODIFIED "ResourceAllocationSettingDataModifiedIndication"
+#if LIBVIR_VERSION_NUMBER < 9000
/* Network QoS support */
#define QOSCMD_BANDWIDTH2ID "_ROOT=$(tc class show dev %s | awk '($4==\"root\")\
{print $3}')\n tc class show dev %s | awk -v rr=$_ROOT -v bw=%uKbit \
@@ -96,6 +97,7 @@ $U32 match u16 0x0800 0xFFFF at -2 match u16 0x$ME2 0xFFFF at -4 match u32 \
ffff: prio 50 u32\"; $U32 match u16 0x0800 0xFFFF at -2 match u32 0x$MI2 \
0xFFFFFFFF at -12 match u16 0x$MI1 0xFFFF at -14 police rate %uKbit burst 15k \
drop\n"
+#endif
const static CMPIBroker *_BROKER;
@@ -105,6 +107,7 @@ enum ResourceAction {
RESOURCE_MOD,
};
+#if LIBVIR_VERSION_NUMBER < 9000
/* Network QoS support */
static CMPIStatus add_qos_for_mac(const uint64_t qos,
const char *mac,
@@ -202,6 +205,7 @@ static CMPIStatus remove_qos_for_mac(const uint64_t qos,
free(cmd);
return s;
}
+#endif
static CMPIStatus check_uuid_in_use(const CMPIObjectPath *ref,
struct domain *domain)
@@ -973,6 +977,15 @@ static const char *net_rasd_to_vdev(CMPIInstance *inst,
dev->dev.net.model = NULL;
else
dev->dev.net.model = strdup(val);
+
+ if (cu_get_u64_prop(inst, "Reservation",
+ &dev->dev.net.reservation) != CMPI_RC_OK)
+ dev->dev.net.reservation = 0;
+
+ if (cu_get_u64_prop(inst, "Limit",
+ &dev->dev.net.limit) != CMPI_RC_OK)
+ dev->dev.net.limit = 0;
+
out:
free(network);
return msg;
@@ -1645,8 +1658,10 @@ static const char *classify_resources(CMPIArray *resources,
} else if (type == CIM_RES_TYPE_NET) {
struct virt_device dev;
int ncount = count + domain->dev_net_ct;
+#if LIBVIR_VERSION_NUMBER < 9000
uint64_t qos_val = 0;
const char *qos_unitstr;
+#endif
memset(&dev, 0, sizeof(dev));
msg = rasd_to_vdev(inst,
@@ -1659,6 +1674,7 @@ static const char *classify_resources(CMPIArray *resources,
ncount,
&domain->dev_net_ct);
+#if LIBVIR_VERSION_NUMBER < 9000
/* Network QoS support */
if (((&dev)->dev.net.mac != NULL) &&
((&dev)->dev.net.source != NULL) &&
@@ -1672,6 +1688,7 @@ static const char *classify_resources(CMPIArray *resources,
(&dev)->dev.net.mac,
(&dev)->dev.net.source);
}
+#endif
} else if (type == CIM_RES_TYPE_GRAPHICS) {
struct virt_device dev;
int gcount = count + domain->dev_graphics_ct;
@@ -2763,14 +2780,16 @@ static CMPIStatus resource_mod(struct domain *dominfo,
(type == CIM_RES_TYPE_INPUT))
cu_statusf(_BROKER, &s, CMPI_RC_OK, "");
else {
+#if LIBVIR_VERSION_NUMBER < 9000
uint64_t qos_val = 0;
const char *qos_unitstr;
-
+#endif
s = _resource_dynamic(dominfo,
dev,
RESOURCE_MOD,
CLASSNAME(op));
+#if LIBVIR_VERSION_NUMBER < 9000
/* Network QoS support */
if ((type == CIM_RES_TYPE_NET) &&
(dev->dev.net.mac != NULL) &&
@@ -2785,6 +2804,7 @@ static CMPIStatus resource_mod(struct domain *dominfo,
dev->dev.net.mac,
dev->dev.net.source);
}
+#endif
}
break;
}
--
1.7.1
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