diff --git a/iscsi-server/iscsi-server-lib.pl b/iscsi-server/iscsi-server-lib.pl
index c3b665811..c1e70a2b7 100644
--- a/iscsi-server/iscsi-server-lib.pl
+++ b/iscsi-server/iscsi-server-lib.pl
@@ -265,5 +265,43 @@ else {
 	}
 }
 
+# find_extent_users(&config, &extent|&device)
+# Returns a list of all targets or devices using some extent or device
+sub find_extent_users
+{
+my ($conf, $obj) = @_;
+my $name = $obj->{'type'}.$obj->{'num'};
+my @rv;
+foreach my $c (@$conf) {
+	if ($c->{'type'} eq 'target' && $c->{'export'} eq $name) {
+		push(@rv, $c);
+		}
+	elsif ($c->{'type'} eq 'device' &&
+	       &indexof($name, @{$c->{'extents'}}) >= 0) {
+		push(@rv, $c);
+		}
+	}
+return @rv;
+}
+
+# describe_object(&object)
+# Returns a human-readable description of some extent, device or target
+sub describe_object
+{
+my ($obj) = @_;
+if ($obj->{'type'} eq 'extent') {
+	return &text('desc_extent', &mount::device_name($obj->{'device'}));
+	}
+elsif ($obj->{'type'} eq 'device') {
+	return &text('desc_device', "<tt>$obj->{'type'}$obj->{'num'}</tt>");
+	}
+elsif ($obj->{'type'} eq 'target') {
+	return &text('desc_target', $obj->{'network'});
+	}
+else {
+	return "Unknown $obj->{'type'} object";
+	}
+}
+
 1;
 
diff --git a/iscsi-server/lang/en b/iscsi-server/lang/en
index d051cc282..923e7d7fb 100644
--- a/iscsi-server/lang/en
+++ b/iscsi-server/lang/en
@@ -42,10 +42,12 @@ extent_other=Other file or device
 extents_rusure=Are you sure you want to delete the shared device $1? Its contents will be preserved, but it will no longer be accessible to iSCSI clients.
 extent_sure=Delete Device
 extent_err=Failed to save device to share
+extent_derr=Failed to delete device to share
 extent_eother=File to share does not exist
 extent_estart=Start of extent must be a number
 extent_esize=Size of extent must be a number
 extent_esizemax=End of extent cannot be larger than the device size of $1
+extent_einuse=This device cannot be deleted, as it is in use by : $1
 
 devices_title=Devices Combinations
 devices_none=No device combinations have been created yet.
@@ -68,3 +70,6 @@ targets_network=Share with network
 targets_add=Add a new sharing target.
 targets_delete=Delete Selected Targets
 
+desc_extent=Device to share $1
+desc_device=Device combination $1
+desc_target=Sharing target $1