[libvirt] [PATCHv2] qemu: escape ipv6 for rbd network disk hosts
Josh Durgin
josh.durgin at inktank.com
Fri Jan 25 02:45:31 UTC 2013
Hosts for rbd are ceph monitor daemons. These have fixed IP addresses,
so they are often referenced by IP rather than hostname for
convenience, or to avoid relying on DNS. Using IPv4 addresses as the
host name works already, but IPv6 addresses require rbd-specific
escaping because the colon is used as an option separator in the
string passed to qemu.
Escape these colons, and enclose the IPv6 address in square brackets
so it is distinguished from the port, which is currently mandatory.
Acked-by: Osier Yang <jyang at redhat.com>
Signed-off-by: Josh Durgin <josh.durgin at inktank.com>
---
Since v1, in response to Osier's review:
- corrected commit message
- eliminated extra call to strstr() in qemuAddRBDHost
docs/schemas/domaincommon.rng | 5 ++-
src/qemu/qemu_command.c | 33 ++++++++++++++----
tests/qemuargv2xmltest.c | 1 +
.../qemuxml2argv-disk-drive-network-rbd-ipv6.args | 9 +++++
.../qemuxml2argv-disk-drive-network-rbd-ipv6.xml | 36 ++++++++++++++++++++
tests/qemuxml2argvtest.c | 2 +
6 files changed, 78 insertions(+), 8 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.xml
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 7f3320e..273e54c 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1099,7 +1099,10 @@
</attribute>
</optional>
<attribute name="name">
- <ref name="dnsName"/>
+ <choice>
+ <ref name="dnsName"/>
+ <ref name="ipAddr"/>
+ </choice>
</attribute>
<attribute name="port">
<ref name="unsignedInt"/>
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 02fe015..f6273c1 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -34,6 +34,7 @@
#include "virerror.h"
#include "virutil.h"
#include "virfile.h"
+#include "virstring.h"
#include "viruuid.h"
#include "c-ctype.h"
#include "domain_nwfilter.h"
@@ -1937,13 +1938,16 @@ qemuBuildRBDString(virConnectPtr conn,
if (i) {
virBufferAddLit(opt, "\\;");
}
- if (disk->hosts[i].port) {
- virBufferAsprintf(opt, "%s\\:%s",
- disk->hosts[i].name,
- disk->hosts[i].port);
+
+ /* assume host containing : is ipv6 */
+ if (strchr(disk->hosts[i].name, ':')) {
+ virBufferEscape(opt, '\\', ":", "[%s]", disk->hosts[i].name);
} else {
virBufferAsprintf(opt, "%s", disk->hosts[i].name);
}
+ if (disk->hosts[i].port) {
+ virBufferAsprintf(opt, "\\:%s", disk->hosts[i].port);
+ }
}
}
@@ -1961,15 +1965,25 @@ error:
static int qemuAddRBDHost(virDomainDiskDefPtr disk, char *hostport)
{
char *port;
+ size_t skip;
+ char **parts;
disk->nhosts++;
if (VIR_REALLOC_N(disk->hosts, disk->nhosts) < 0)
goto no_memory;
- port = strstr(hostport, "\\:");
+ if ((port = strchr(hostport, ']'))) {
+ /* ipv6, strip brackets */
+ hostport += 1;
+ skip = 3;
+ } else {
+ port = strstr(hostport, "\\:");
+ skip = 2;
+ }
+
if (port) {
*port = '\0';
- port += 2;
+ port += skip;
disk->hosts[disk->nhosts-1].port = strdup(port);
if (!disk->hosts[disk->nhosts-1].port)
goto no_memory;
@@ -1978,7 +1992,12 @@ static int qemuAddRBDHost(virDomainDiskDefPtr disk, char *hostport)
if (!disk->hosts[disk->nhosts-1].port)
goto no_memory;
}
- disk->hosts[disk->nhosts-1].name = strdup(hostport);
+
+ parts = virStringSplit(hostport, "\\:", 0);
+ if (!parts)
+ goto no_memory;
+ disk->hosts[disk->nhosts-1].name = virStringJoin((const char **)parts, ":");
+ virStringFreeList(parts);
if (!disk->hosts[disk->nhosts-1].name)
goto no_memory;
diff --git a/tests/qemuargv2xmltest.c b/tests/qemuargv2xmltest.c
index 2923324..e465f3d 100644
--- a/tests/qemuargv2xmltest.c
+++ b/tests/qemuargv2xmltest.c
@@ -185,6 +185,7 @@ mymain(void)
DO_TEST("disk-drive-network-nbd");
DO_TEST("disk-drive-network-gluster");
DO_TEST("disk-drive-network-rbd");
+ DO_TEST("disk-drive-network-rbd-ipv6");
/* older format using CEPH_ARGS env var */
DO_TEST("disk-drive-network-rbd-ceph-env");
DO_TEST("disk-drive-network-sheepdog");
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.args b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.args
new file mode 100644
index 0000000..0c67229
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.args
@@ -0,0 +1,9 @@
+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=rbd:pool/image:auth_supported=none:\
+mon_host=[\:\:1]\:6321\;example.org\:6789\;\
+[ffff\:1234\:567\:abc\:\:0f]\:6322\;\
+[2001\:db8\:\:ff00\:42\:8329]\:6322,\
+if=virtio,format=raw' -net none -serial none -parallel none
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.xml
new file mode 100644
index 0000000..a2ca2d2
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-rbd-ipv6.xml
@@ -0,0 +1,36 @@
+<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='rbd' name='pool/image'>
+ <host name='::1' port='6321'/>
+ <host name='example.org' port='6789'/>
+ <host name='ffff:1234:567:abc::0f' port='6322'/>
+ <host name='2001:db8::ff00:42:8329' port='6322'/>
+ </source>
+ <target dev='vda' bus='virtio'/>
+ </disk>
+ <controller type='usb' index='0'/>
+ <controller type='ide' index='0'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 31ed116..88e1c36 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -478,6 +478,8 @@ mymain(void)
QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
DO_TEST("disk-drive-network-rbd-auth",
QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
+ DO_TEST("disk-drive-network-rbd-ipv6",
+ QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
DO_TEST("disk-drive-no-boot",
QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_BOOTINDEX);
DO_TEST("disk-usb", NONE);
--
1.7.2.5
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