ISO CIFS SR inaccessible after upgrade to Citrix Hypervisor 8.1.0

After upgrading Citrix Hypervisor 8.0.0 to 8.1.0, all ISO CIFS SR became inaccessible.

The CIFS shares are held by our Samba server and they are available read-only without any authentication. Manually adding a new ISO CIFS SR revealed that the username must be specified as \ (blackslash), indicating no domain name and no username. No password is needed just as before.

Run this command creating a skeletal shell script.

xe sr-list type=iso params | egrep 'name-label|name-descr' | cut -d : -f 2 > fix-iso-cifs.sh

Remove lines not related to any ISO CIFS SRs (revealing that type=iso doesn’t do any filtering). Trim each line containing UNC paths. Leave a space in front of each UNC path. Double each occurence of the backslash character in the UNC paths.

Add these lines to the top of the script:

#!/bin/sh

mk_iso_cifs ()
{
  xe sr-create content-type=iso type=iso shared=true \
    device-config:location="$2" \
    device-config:username=\\ device-config:type=cifs \
    device-config:vers=3.0 name-label="$1" \
    name-description="SMB ISO Library [$2]"
}

Join the line for each description with the line for the associated UNC path. Add “mk_iso_cifs” in front of each line. Save the file and make it executable.

The resulting shell script might look like this:

#!/bin/sh

mk_iso_cifs ()
{
  xe sr-create content-type=iso type=iso shared=true \
    device-config:location="$2" \
    device-config:username=\\ device-config:type=cifs \
    device-config:vers=3.0 name-label="$1" \
    name-description="SMB ISO Library [$2]"
}

mk_iso_cifs "FreeBSD/amd64 stable/11 snapshots" \\\\hostname\\sharename\\dir1\\dir2\\FreeBSD\\snapshots\\ISO-IMAGES\\amd64\\11.3
mk_iso_cifs "FreeBSD/amd64 stable/12 snapshots" \\\\hostname\\sharename\\dir1\\dir2\\FreeBSD\\snapshots\\ISO-IMAGES\\amd64\\12.1

Remove the inaccessible ISO CIFS SR using Citrix XenCenter and run the above script from the console. The value for description (name-description) is ignored for some unknown reason.