Disallow providing the wwnn/wwpn of the HBA in the adapter XML:
<adapter type='fc_host' [parent='scsi_hostN'] wwnn='HBA_wwnn'
wwpn='HBA_wwpn'/>
This should be considered a configuration error since a vHBA
would not be created. In order to use the HBA as the backing the
following XML should be used:
<adapter type='scsi_host' name='scsi_hostN'/>
This also alters the caller such that the @parent_name param
into checkParent can be NULL so as to confirm that at least
the provided wwnn/wwpn found a vHBA instead of an HBA.
Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
---
docs/formatstorage.html.in | 27 +++++++++++++----------
src/storage/storage_backend_scsi.c | 45 ++++++++++++++++++++++++++++----------
2 files changed, 49 insertions(+), 23 deletions(-)
diff --git a/docs/formatstorage.html.in b/docs/formatstorage.html.in
index 4946ddf..27578e8 100644
--- a/docs/formatstorage.html.in
+++ b/docs/formatstorage.html.in
@@ -207,18 +207,21 @@
</dl>
<dl>
<dt><code>wwnn</code> and <code>wwpn</code></dt>
- <dd>The "World Wide Node Name" (<code>wwnn</code>) and "World Wide
- Port Name" (<code>wwpn</code>) are used by the "fc_host" adapter
- to uniquely identify the device in the Fibre Channel storage fabric
- (the device can be either a HBA or vHBA). Both wwnn and wwpn should
- be specified. Use the command 'virsh nodedev-dumpxml' to determine
- how to set the values for the wwnn/wwpn of a (v)HBA. The wwnn and
- wwpn have very specific numerical format requirements based on the
- hypervisor being used, thus care should be taken if you decide to
- generate your own to follow the standards; otherwise, the pool
- will fail to start with an opaque error message indicating failure
- to write to the vport_create file during vport create/delete due
- to "No such file or directory".
+ <dd>The required "World Wide Node Name" (<code>wwnn</code>) and
+ "World Wide Port Name" (<code>wwpn</code>) are used by the
+ "fc_host" adapter to uniquely identify the vHBA device in the
+ Fibre Channel storage fabric. If the vHBA device already exists
+ as a Node Device, then libvirt will use it; otherwise, the vHBA
+ will be created using the provided values. It is considered a
+ configuration error use the values from the HBA as those would
+ be for a "scsi_host" <code>type</code> pool instead. The
+ <code>wwnn</code> and <code>wwpn</code> have very specific
+ format requirements based on the hypervisor being used, thus
+ care should be taken if you decide to generate your own to
+ follow the standards; otherwise, the pool will fail to start
+ with an opaque error message indicating failure to write to
+ the vport_create file during vport create/delete due to
+ "No such file or directory".
<span class="since">Since 1.0.4</span>
</dd>
</dl>
diff --git a/src/storage/storage_backend_scsi.c b/src/storage/storage_backend_scsi.c
index af12889..c802738 100644
--- a/src/storage/storage_backend_scsi.c
+++ b/src/storage/storage_backend_scsi.c
@@ -231,22 +231,47 @@ checkParent(virConnectPtr conn,
if (!conn)
return true;
- if (virSCSIHostGetNumber(parent_name, &host_num) < 0) {
- virReportError(VIR_ERR_XML_ERROR,
- _("parent '%s' is not properly formatted"),
- parent_name);
+ /* If there's a parent_name, then make sure it's valid */
+ if (parent_name) {
+ if (virSCSIHostGetNumber(parent_name, &host_num) < 0) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("parent '%s' is not properly formatted"),
+ parent_name);
+ goto cleanup;
+ }
+
+ if (!virVHBAPathExists(NULL, host_num)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("parent '%s' is not an fc_host for the wwnn/wwpn"),
+ parent_name);
+ goto cleanup;
+ }
+ }
+
+ if (virAsprintf(&scsi_host_name, "scsi_%s", name) < 0)
+ goto cleanup;
+
+ if (virSCSIHostGetNumber(scsi_host_name, &host_num) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("host name '%s' is not properly formatted"),
+ name);
goto cleanup;
}
- if (!virVHBAPathExists(NULL, host_num)) {
+ /* If scsi_host_name is vport capable, then it's an HBA. This is
+ * a configuration error as the wwnn/wwpn should only be for a vHBA */
+ if (virVHBAIsVportCapable(NULL, host_num)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("parent '%s' is not an fc_host for the wwnn/wwpn"),
- parent_name);
+ _("the wwnn/wwpn for '%s' are assigned to an HBA"),
+ scsi_host_name);
goto cleanup;
}
- if (virAsprintf(&scsi_host_name, "scsi_%s", name) < 0)
+ /* No parent name, then no need to get/compare against vhba_parent */
+ if (!parent_name) {
+ retval = true;
goto cleanup;
+ }
if (!(vhba_parent = virNodeDeviceGetParentName(conn, scsi_host_name)))
goto cleanup;
@@ -288,9 +313,7 @@ createVport(virConnectPtr conn,
* this pool and we don't have to create the vHBA
*/
if ((name = virVHBAGetHostByWWN(NULL, fchost->wwnn, fchost->wwpn))) {
- /* If a parent was provided, let's make sure the 'name' we've
- * retrieved has the same parent. If not this will cause failure. */
- if (!fchost->parent || checkParent(conn, name, fchost->parent))
+ if (checkParent(conn, name, fchost->parent))
ret = 0;
goto cleanup;
--
2.9.4
--
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