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qemu: support named nbd exports

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These are supported by nbd-server and by the NBD server that QEMU
embeds for live image access.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-02-25 18:44:23 +01:00 committed by Eric Blake
parent db95213e59
commit 0aa9f522c4
7 changed files with 62 additions and 3 deletions
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6
docs/formatdomain.html.in
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@ -1441,9 +1441,9 @@
are "nbd", "rbd", "sheepdog" or "gluster". If the
<code>protocol</code> attribute is "rbd", "sheepdog" or "gluster", an
additional attribute <code>name</code> is mandatory to specify which
volume/image will be used. When the disk <code>type</code> is
"network", the <code>source</code> may have zero or
more <code>host</code> sub-elements used to specify the hosts
volume/image will be used; for "nbd" it is optional. When the disk
<code>type</code> is "network", the <code>source</code> may have zero
or more <code>host</code> sub-elements used to specify the hosts
to connect.
<span class="since">Since 0.0.3; <code>type='dir'</code> since
0.7.5; <code>type='network'</code> since 0.8.7</span><br/>

17
src/qemu/qemu_command.c
View File

@ -2378,6 +2378,7 @@ qemuParseNBDString(virDomainDiskDefPtr disk)
{
virDomainDiskHostDefPtr h = NULL;
char *host, *port;
char *src;
if (VIR_ALLOC(h) < 0)
goto no_memory;
@ -2395,11 +2396,24 @@ qemuParseNBDString(virDomainDiskDefPtr disk)
if (!h->name)
goto no_memory;
src = strchr(port, ':');
if (src)
*src++ = '\0';
h->port = strdup(port);
if (!h->port)
goto no_memory;
if (src && STRPREFIX(src, "exportname=")) {
src = strdup(strchr(src, '=') + 1);
if (!src)
goto no_memory;
} else {
src = NULL;
}
VIR_FREE(disk->src);
disk->src = src;
disk->nhosts = 1;
disk->hosts = h;
return 0;
@ -2503,6 +2517,9 @@ qemuBuildNBDString(virDomainDiskDefPtr disk, virBufferPtr opt)
break;
}
if (disk->src)
virBufferEscape(opt, ',', ",", ":exportname=%s", disk->src);
return 0;
}

1
tests/qemuargv2xmltest.c
View File

@ -185,6 +185,7 @@ mymain(void)
DO_TEST("disk-drive-cache-directsync");
DO_TEST("disk-drive-cache-unsafe");
DO_TEST("disk-drive-network-nbd");
DO_TEST("disk-drive-network-nbd-export");
DO_TEST("disk-drive-network-gluster");
DO_TEST("disk-drive-network-rbd");
DO_TEST("disk-drive-network-rbd-ipv6");

5
tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-nbd-export.args Normal file
View File

@ -0,0 +1,5 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M \
pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait \
-no-acpi -boot c -usb -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 \
-drive file=nbd:example.org:6000:exportname=bar,if=virtio,format=raw \
-net none -serial none -parallel none

33
tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-nbd-export.xml Normal file
View File

@ -0,0 +1,33 @@
<domain type='qemu'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory unit='KiB'>219136</memory>
<currentMemory unit='KiB'>219136</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'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='network' device='disk'>
<driver name='qemu' type='raw'/>
<source protocol='nbd' name='bar'>
<host name='example.org' port='6000'/>
</source>
<target dev='vda' bus='virtio'/>
</disk>
<controller type='usb' index='0'/>
<controller type='ide' index='0'/>
<memballoon model='virtio'/>
</devices>
</domain>

2
tests/qemuxml2argvtest.c
View File

@ -493,6 +493,8 @@ mymain(void)
QEMU_CAPS_DRIVE_CACHE_UNSAFE, QEMU_CAPS_DRIVE_FORMAT);
DO_TEST("disk-drive-network-nbd",
QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
DO_TEST("disk-drive-network-nbd-export",
QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
DO_TEST("disk-drive-network-gluster",
QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
DO_TEST("disk-drive-network-rbd",

1
tests/qemuxml2xmltest.c
View File

@ -170,6 +170,7 @@ mymain(void)
DO_TEST("disk-drive-cache-v1-wb");
DO_TEST("disk-drive-cache-v1-none");
DO_TEST("disk-drive-network-nbd");
DO_TEST("disk-drive-network-nbd-export");
DO_TEST("disk-scsi-device");
DO_TEST("disk-scsi-vscsi");
DO_TEST("disk-scsi-virtio-scsi");