tree db21d5dc214d0dd9793dfee813e0e358d16013f5
parent 9c395170a559d3b23dad100b01fc4a89d661c698
author Roland Dreier <roland@purestorage.com> 1439528359 -0700
committer Nicholas Bellinger <nab@linux-iscsi.org> 1439959914 -0700

target: Fix handling of small allocation lengths in REPORT LUNS

REPORT LUNS should not fail just because the allocation length is less
than 16.  The relevant section of SPC-4 is:

  4.2.5.6 Allocation length

  The ALLOCATION LENGTH field specifies the maximum number of bytes or
  blocks that an application client has allocated in the Data-In
  Buffer. The ALLOCATION LENGTH field specifies bytes unless a
  different requirement is stated in the command definition.

  An allocation length of zero specifies that no data shall be
  transferred. This condition shall not be considered an error.

So we should just truncate our response rather than return an error.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Spencer Baugh <sbaugh@catern.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>