On Wed, Nov 11, 2020 at 10:24 AM Jason Dillaman <jdillama@xxxxxxxxxx> wrote:
On Tue, Nov 10, 2020 at 8:43 PM Han Han <hhan@xxxxxxxxxx> wrote:
>
> Signed-off-by: Han Han <hhan@xxxxxxxxxx>
> ---
> docs/formatdomain.rst | 16 ++++++++++++++
> src/conf/domain_conf.c | 47 ++++++++++++++++++++++++++++++++++++++----
> 2 files changed, 59 insertions(+), 4 deletions(-)
>
> diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
> index a6ab845f92..2b760e6a39 100644
> --- a/docs/formatdomain.rst
> +++ b/docs/formatdomain.rst
> @@ -2409,6 +2409,16 @@ paravirtualized driver is specified via the ``disk`` element.
> </source>
> <target dev='vde' bus='virtio'/>
> </disk>
> + <disk type='network'>
> + <driver name="qemu" type="raw"/>
> + <source protocol="rbd" name="pool/namespace/image">
> + <host name="hostname" port="7000"/>
> + <auth username='myuser'>
> + <secret type='ceph' usage='mypassid'/>
> + </auth>
> + </source>
> + <target dev="vdf" bus="virtio"/>
> + </disk>
> </devices>
> ...
>
> @@ -2500,6 +2510,12 @@ paravirtualized driver is specified via the ``disk`` element.
> the host by the ``nbd_tls`` and ``nbd_tls_x509_cert_dir`` in
> /etc/libvirt/qemu.conf. ('tls' :since:`Since 4.5.0` )
>
> + For "rbd", the ``name`` attribute could be two formats: the format of
> + ``pool_name/image_name`` includes the rbd pool name and image name with
> + default rbd pool namespace; for the customized namespace, the format is
> + ``pool_name/namespace/image_name`` ( :since:`Since 6.9.0 and QEMU 5.0` ).
> + The pool name, namespace and image are separated by slash.
> +
> For protocols ``http`` and ``https`` an optional attribute ``query``
> specifies the query string. ( :since:`Since 6.2.0` )
>
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index d84d0327ad..a337051e30 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -9554,6 +9554,7 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
> g_autofree char *tlsCfg = NULL;
> g_autofree char *sslverifystr = NULL;
> xmlNodePtr tmpnode;
> + char **tmp_split_paths;
>
> if (!(protocol = virXMLPropString(node, "protocol"))) {
> virReportError(VIR_ERR_XML_ERROR, "%s",
> @@ -9595,8 +9596,7 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
> /* for historical reasons we store the volume and image name in one XML
> * element although it complicates thing when attempting to access them. */
> if (src->path &&
> - (src->protocol == VIR_STORAGE_NET_PROTOCOL_GLUSTER ||
> - src->protocol == VIR_STORAGE_NET_PROTOCOL_RBD)) {
> + src->protocol == VIR_STORAGE_NET_PROTOCOL_GLUSTER) {
> char *tmp;
> if (!(tmp = strchr(src->path, '/')) ||
> tmp == src->path) {
> @@ -9613,6 +9613,41 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
> tmp[0] = '\0';
> }
>
> + /* the name of rbd could be <pool>/<image> or <pool>/<namespace>/<image> */
> + if (src->path &&
> + src->protocol == VIR_STORAGE_NET_PROTOCOL_RBD &&
> + (tmp_split_paths = virStringSplit(src->path, "/", 3))) {
> + if (virStringIsEmpty(tmp_split_paths[0]) ||
> + !tmp_split_paths[1] ||
> + STREQ_NULLABLE(tmp_split_paths[2], "") ||
> + (virStringIsEmpty(tmp_split_paths[1]) &&
> + !tmp_split_paths[2])) {
> + virStringListFreeCount(tmp_split_paths, 3);
> + virReportError(VIR_ERR_XML_ERROR,
> + _("can't split path '%s' into pool name, pool "
> + "namespace, image name OR pool name, image name"),
> + src->path);
> + return -1;
> + }
> +
> + VIR_FREE(src->path);
> + src->volume = g_strdup(tmp_split_paths[0]);
> + /* the format of <pool>/<image> */
> + if (!tmp_split_paths[2])
> + src->path = g_strdup(tmp_split_paths[1]);
> +
> + if (tmp_split_paths[2]) {
> + /* the format of <pool>/<ns>/<image> */
> + if (STRNEQ_NULLABLE(tmp_split_paths[1], ""))
> + src->ns = g_strdup(tmp_split_paths[1]);
> +
> + /* the format of <pool>//<image> */
> + src->path = g_strdup(tmp_split_paths[2]);
Nit: I think QEMU and the rbd CLI will both treat this case as an
image named "/<image>" instead of "<image>".
The results of qemu(qemu-kvm-5.1.0-5.fc33.x86_64) and rbd CLI(ceph-common-15.2.5-1.fc33.x86_64)
are different here:
➜ ~ qemu-img info rbd:rbd//copy:conf=$HOME/.ceph/ceph.conf:key=XXXXXXXXXX
image: json:{"driver": "raw", "file": {"pool": "rbd", "image": "copy", "conf": "/home/hhan/.ceph/ceph.conf", "driver": "rbd"}}
file format: raw
virtual size: 10 GiB (10737418240 bytes)
disk size: unavailable
cluster_size: 4194304
image: json:{"driver": "raw", "file": {"pool": "rbd", "image": "copy", "conf": "/home/hhan/.ceph/ceph.conf", "driver": "rbd"}}
file format: raw
virtual size: 10 GiB (10737418240 bytes)
disk size: unavailable
cluster_size: 4194304
➜ ~ rbd info rbd//copy
rbd: error opening image /copy: (2) No such file or directory
➜ ~ rbd info rbd/copy
rbd image 'copy':
size 10 GiB in 2560 objects
order 22 (4 MiB objects)
snapshot_count: 0
id: 4a4956b8b4567
block_name_prefix: rbd_data.4a4956b8b4567
format: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
op_features:
flags:
create_timestamp: Tue Mar 17 15:43:38 2020
access_timestamp: Wed Nov 11 13:29:33 2020
modify_timestamp: Tue Mar 17 15:43:38 2020
size 10 GiB in 2560 objects
order 22 (4 MiB objects)
snapshot_count: 0
id: 4a4956b8b4567
block_name_prefix: rbd_data.4a4956b8b4567
format: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
op_features:
flags:
create_timestamp: Tue Mar 17 15:43:38 2020
access_timestamp: Wed Nov 11 13:29:33 2020
modify_timestamp: Tue Mar 17 15:43:38 2020
I wonder which parsing pattern should be applied to in libvirt...
Otherwise,
Reviewed-by: Jason Dillaman <dillaman@xxxxxxxxxx>
> + }
> +
> + virStringListFreeCount(tmp_split_paths, 3);
> + }
> +
> /* snapshot currently works only for remote disks */
> src->snapshot = virXPathString("string(./snapshot/@name)", ctxt);
>
> @@ -25351,8 +25386,12 @@ virDomainDiskSourceFormatNetwork(virBufferPtr attrBuf,
> virBufferAsprintf(attrBuf, " protocol='%s'",
> virStorageNetProtocolTypeToString(src->protocol));
>
> - if (src->volume)
> - path = g_strdup_printf("%s/%s", src->volume, src->path);
> + if (src->volume) {
> + if (src->ns)
> + path = g_strdup_printf("%s/%s/%s", src->volume, src->ns, src->path);
> + else
> + path = g_strdup_printf("%s/%s", src->volume, src->path);
> + }
>
> virBufferEscapeString(attrBuf, " name='%s'", path ? path : src->path);
> virBufferEscapeString(attrBuf, " query='%s'", src->query);
> --
> 2.28.0
>
--
Jason
