[libvirt] [PATCH v2 7/9] conf: Add support for blkiotune group_name option
John Ferlan
jferlan at redhat.com
Mon Nov 7 21:56:42 UTC 2016
Modify _virDomainBlockIoTuneInfo and rng schema to support the group_name
option for iotune throttling. Document the new value.
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
docs/formatdomain.html.in | 11 ++++
docs/schemas/domaincommon.rng | 5 ++
src/conf/domain_conf.c | 9 ++++
.../qemuxml2argv-blkdeviotune-group-num.xml | 61 ++++++++++++++++++++++
.../qemuxml2xmlout-blkdeviotune-group-num.xml | 1 +
tests/qemuxml2xmltest.c | 1 +
6 files changed, 88 insertions(+)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-blkdeviotune-group-num.xml
create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-blkdeviotune-group-num.xml
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 11b3330..6d26c70 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2622,6 +2622,17 @@
<span class="since">Throughput limits since 1.2.11 and QEMU 1.7</span>
</p>
</dd>
+ <dt><code>group_name</code></dt>
+ <dd>The optional <code>group_name</code> provides the cability
+ to share I/O throttling quota between multiple drives. This
+ prevents end-users from circumventing a hosting provider's
+ throttling policy by splitting 1 large drive in N small drives
+ and getting N times the normal throttling quota. Any name may
+ be used.
+ <p>
+ <span class="since">group_name since 2.5.0 and QEMU 2.4</span>
+ </p>
+ </dd>
<dt><code>total_bytes_sec_max_length</code></dt>
<dd>The optional <code>total_bytes_sec_max_length</code>
element is the maximum duration in seconds for the
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 19d45fd..c44b414 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4974,6 +4974,11 @@
<data type="unsignedLong"/>
</element>
</optional>
+ <optional>
+ <element name="group_name">
+ <text/>
+ </element>
+ </optional>
<choice>
<element name="total_bytes_sec_max_length">
<data type="unsignedLong"/>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index d3359ab..12092b3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -7215,6 +7215,9 @@ virDomainDiskDefIotuneParse(virDomainDiskDefPtr def,
PARSE_IOTUNE(read_iops_sec_max_length);
PARSE_IOTUNE(write_iops_sec_max_length);
+ def->blkdeviotune.group_name =
+ virXPathString("string(./iotune/group_name)", ctxt);
+
if ((def->blkdeviotune.total_bytes_sec &&
def->blkdeviotune.read_bytes_sec) ||
(def->blkdeviotune.total_bytes_sec &&
@@ -20419,6 +20422,7 @@ virDomainDiskDefFormat(virBufferPtr buf,
def->blkdeviotune.read_iops_sec_max ||
def->blkdeviotune.write_iops_sec_max ||
def->blkdeviotune.size_iops_sec ||
+ def->blkdeviotune.group_name ||
def->blkdeviotune.total_bytes_sec_max_length ||
def->blkdeviotune.read_bytes_sec_max_length ||
def->blkdeviotune.write_bytes_sec_max_length ||
@@ -20447,6 +20451,11 @@ virDomainDiskDefFormat(virBufferPtr buf,
def->blkdeviotune.size_iops_sec);
}
+ if (def->blkdeviotune.group_name) {
+ virBufferEscapeString(buf, "<group_name>%s</group_name>\n",
+ def->blkdeviotune.group_name);
+ }
+
FORMAT_IOTUNE(total_bytes_sec_max_length);
FORMAT_IOTUNE(read_bytes_sec_max_length);
FORMAT_IOTUNE(write_bytes_sec_max_length);
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-blkdeviotune-group-num.xml b/tests/qemuxml2argvdata/qemuxml2argv-blkdeviotune-group-num.xml
new file mode 100644
index 0000000..e2a9999
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-blkdeviotune-group-num.xml
@@ -0,0 +1,61 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <disk type='block' device='disk'>
+ <driver name='qemu' type='qcow2' cache='none'/>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <iotune>
+ <total_bytes_sec>5000</total_bytes_sec>
+ <total_iops_sec>6000</total_iops_sec>
+ <total_bytes_sec_max>10000</total_bytes_sec_max>
+ <total_iops_sec_max>11000</total_iops_sec_max>
+ <group_name>libvirt_iotune_group1</group_name>
+ </iotune>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <disk type='block' device='disk'>
+ <driver name='qemu' type='qcow2' cache='none'/>
+ <source dev='/dev/HostVG/QEMUGuest2'/>
+ <target dev='hdb' bus='ide'/>
+ <iotune>
+ <read_bytes_sec>5000</read_bytes_sec>
+ <write_bytes_sec>5500</write_bytes_sec>
+ <read_iops_sec>3500</read_iops_sec>
+ <write_iops_sec>4000</write_iops_sec>
+ <read_bytes_sec_max>6000</read_bytes_sec_max>
+ <write_bytes_sec_max>6500</write_bytes_sec_max>
+ <read_iops_sec_max>7000</read_iops_sec_max>
+ <write_iops_sec_max>7500</write_iops_sec_max>
+ <size_iops_sec>2000</size_iops_sec>
+ <group_name>libvirt_iotune_group2</group_name>
+ </iotune>
+ <address type='drive' controller='0' bus='0' target='0' unit='1'/>
+ </disk>
+ <controller type='usb' index='0'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+ </controller>
+ <controller type='ide' index='0'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+ </controller>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <memballoon model='virtio'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+ </memballoon>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-blkdeviotune-group-num.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-blkdeviotune-group-num.xml
new file mode 120000
index 0000000..2ed9a68
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-blkdeviotune-group-num.xml
@@ -0,0 +1 @@
+../qemuxml2argvdata/qemuxml2argv-blkdeviotune-group-num.xml
\ No newline at end of file
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 8a2b5ff..b5bba07 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -609,6 +609,7 @@ mymain(void)
DO_TEST("usb-redir-filter-version", NONE);
DO_TEST("blkdeviotune", NONE);
DO_TEST("blkdeviotune-max", NONE);
+ DO_TEST("blkdeviotune-group-num", NONE);
DO_TEST("blkdeviotune-max-length", NONE);
DO_TEST("controller-usb-order", NONE);
--
2.7.4
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