Maor, both patches in the external tracker refer to upstream/master.
If they were not backported, this BZ should be on POST, not MODIFIED.
If they were, please add them as external trackers and move back to MODIFIED.

Adding the backported patches to the bug

Maor, can you please provide steps for new api?

(In reply to Ori Gofen from comment #3)
> Maor, can you please provide steps for new api?

sure, It is described in the documentation at http://www.ovirt.org/Features/ImportStorageDomain#Import_block_Storage_Domain:

Step1: Discover the targets in your iSCSI Storage Server:

POST /api/hosts/052a880a-53e0-4fe3-9ed5-01f939d1df66/iscsidiscover
Accept: application/xml
Content-Type: application/xml
<action>
  <iscsi>
     <address>iscsi.server</address>
  </iscsi>
    <iscsi_target>iqn.iscsi.120.01</iscsi_target>  
    <iscsi_target>iqn.iscsi.120.02</iscsi_target>
   <iscsi_target>iqn.iscsi.120.03</iscsi_target>
</action>



Step2: Get a candidates Storage Domains list to be imported

After the iscsilogin operation, the host is already connected to the targets in the iSCSI and we can fetch the Storage Domains which are candidates to be imported.

POST /api/hosts/052a880a-53e0-4fe3-9ed5-01f939d1df66/unregisteredstoragedomainsdiscover HTTP/1.1
Accept: application/xml
Content-type: application/xml
<action>
   <iscsi>
       <address>iscsiHost</address>
   </iscsi>
   <iscsi_target>iqn.name1.120.01</iscsi_target>
   <iscsi_target>iqn.name2.120.02</iscsi_target>
   <iscsi_target>iqn.name3.120.03</iscsi_target>
</action>

The response which should returned as a list of Storage Domains, as follow:

<action>
   <iscsi>
       <address>iscsiHost</address>
   </iscsi>
   <storage_domains>
       <storage_domain id="6ab65b16-0f03-4b93-85a7-5bc3b8d52be0">
           <name>scsi4</name>
           <type>data</type>
           <master>false</master>
           <storage>
               <type>iscsi</type>
               <volume_group id="OLkKwa-VmEM-abW7-hPiv-BGrw-sQ2E-vTdAy1"/>
           </storage>
           <available>0</available>
           <used>0</used>
           <committed>0</committed>
           <storage_format>v3</storage_format>
       </storage_domain>
   <status>
       <state>complete</state>
   </status>
   <iscsi_target>iqn.name1.120.01</iscsi_target>
   <iscsi_target>iqn.name2.120.02</iscsi_target>
   <iscsi_target>iqn.name3.120.03</iscsi_target>
</action>




Step3: Import the block Storage Domains to the setup

POST /api/storagedomains/ HTTP/1.1
Accept: application/xml
Content-type: application/xml
<storage_domain id="39baf524-380e-407c-8625-50709fcaa9c2">
  <import>true</import>
  <host id="052a880a-53e0-4fe3-9ed5-01f939d1df66" />
  <type>data</type>
  <storage>
     <type>iscsi</type>
  </storage>
</storage_domain>

Maor, please provide doctext for this bug (and the 3.6.0 too, while you're at it).

Tested using rhevm-3.5.1-0.1.el6ev, vdsm-4.16.12-2.el7ev.x86_64
The importing FC domain using Rest-api is supported

Revised doc text; a docs bug to be raised to include an example of adding a block storage domain using the REST API.

(In reply to Andrew Dahms from comment #7)
> Revised doc text; a docs bug to be raised to include an example of adding a
> block storage domain using the REST API.
Thanks Andrew!
When you open it, could you please add a reference to it here?

Hi Allon,

Here it is - https://bugzilla.redhat.com/show_bug.cgi?id=1213803

Let me know if there is anything else we can do for you! :)

Kind regards,

Andrew

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-0888.html