[GIT PULL] target updates for v3.6-rc1 (round 1)

[GIT PULL] target updates for v3.6-rc1 (round 1)

[Nicholas A. Bellinger]

Hello Linus,

The following is the first round of target core + fabric driver updates
for the freshly opened v3.6 merge window.  Please go ahead and pull
from:

  git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git for-next

This series is based on target-pending/master commit 1765fe5edcb83f53f

So I ended up needing to rebase for-next last week to pick up fixes
in master that for-next ended up conflicting with, but the bulk of the
series has been in linux-next a number of weeks and has getting a good
amount of testing.

There have been lots of work in a number of areas this past round.  The
highlights include:

*) Break out target_core_cdb.c emulation into SPC/SBC ops (hch)
*) Add a parse_cdb method to target backend drivers (hch)
*) Move sync_cache + write_same + unmap into spc_ops (hch)
*) Use target_execute_cmd for WRITEs in iscsi_target + srpt (hch)
*) Offload WRITE I/O backend submission in tcm_qla2xxx + tcm_fc (hch + nab)
*) Refactor core_update_device_list_for_node() into enable/disable funcs (agrover)
*) Replace the TCM processing thread with a TMR work queue (hch)
*) Fix regression in transport_add_device_to_core_hba from TMR conversion (DanC)
*) Remove racy, now-redundant check of sess_tearing_down with qla2xxx (roland)
*) Add range checking, fix reading of data len + possible underflow in UNMAP (roland)
*) Allow for target_submit_cmd() returning errors + convert fabrics (roland + nab)
*) Drop bogus struct file usage for iSCSI/SCTP (viro)

Thanks again to everyone who has contributed!

On the new target fabric module front for-3.6, tcm_vhost is currently in
RFC-v4 on the lists + queued up + waiting for ACKs from MST & Co here:

http://marc.info/?l=kvm&m=134285417314176&w=2

At this point I think the vhost folks are pretty agreeable for an
initial merge of this kernel code, but the vhost-scsi bits in upstream
QEMU userspace code will still need to be shorted out.  So because of
this fact, MST has requested to mark this driver as STAGING o indicate
the userspace ABI is not (yet) set in stone.

Currently the last item being discussed for initial merge is if this
code can just be marked as STAGING + live in drivers/vhost/, or if it
should actually reside under drivers/staging/ and go upstream via the
staging tree.  The last -v4 series of the code keeps the initial merge
in drivers/vhost/, which is easier than getting staging to depending on
vhost + target-pending..

So the current plan is to send a [GIT PULL] next weekend, in order to
give MST a chance to review + ACK as he returns from holiday.  Otherwise
if folks object, I'll move this code to drivers/staginig/tcm_vhost/ and
let Greg-KH decide if he's OK to take it via staging for this round.

Thank you!

--nab

Al Viro (1):
  iscsi-target: Drop bogus struct file usage for iSCSI/SCTP

Andy Grover (7):
  target: Do not special-case loop and iscsi fabric module loads
  target/iblock: Add parameter to specify read-only devices
  target: Remove unneeded double parentheses
  target: Remove hba param from core_dev_add_lun
  target: Misc retval cleanups
  target: Eliminate else using boolean logic
  target: refactor core_update_device_list_for_node()

Christoph Hellwig (26):
  target: move unrelated code out of transport_generic_cmd_sequencer
  target: remove control CDB flags
  target: split overflow and underflow checks into a helper
  target: split parsing of SPC commands into a separate helper
  target: add a parse_cdb method to the backend drivers
  target: move code for CDB emulation
  target: move transport_generic_prepare_cdb into pscsi
  target: remove the execute list
  target: move ref_cmd from the generic se_tmr_req into iscsi code
  target: remove dead SCF_ flags
  target: add struct spc_ops + initial ->execute_rw pointer usage
  target: move sync_cache to struct spc_ops
  target: move write_same to struct spc_ops
  target: move unmap to struct spc_ops
  target: split transport_cmd_check_stop
  target: remove transport_generic_process_write
  target: call transport_check_aborted_status from target_execute_cmd
  target: merge transport_generic_write_pending into
    transport_generic_new_cmd
  iscsit: use target_execute_cmd for WRITEs
  srpt: use target_execute_cmd for WRITEs in srpt_handle_rdma_comp
  tcm_qla2xxx: Offload WRITE I/O backend submission to tcm_qla2xxx wq
  tcm_fc: Offload WRITE I/O backend submission to tpg workqueue
  target: remove transport_generic_handle_data
  target: simply fabric driver queue full processing
  target: remove transport_generic_handle_cdb_map
  target: replace the processing thread with a TMR work queue

Dan Carpenter (1):
  target: NULL dereference on error path

Nicholas Bellinger (4):
  target: Move MAINTENANCE_[IN,OUT] from pscsi_parse_cdb ->
    spc_parse_cdb
  target/pscsi: Only emulate REPORT_LUNS for passthrough
  Revert "target: Do not special-case loop and iscsi fabric module
    loads"
  target: Make core_disable_device_list_for_node use pre-refactoring
    lock ordering

Roland Dreier (14):
  target/iscsi: Remove dead code in lio_get_tpg_from_tpg_item()
  qla2xxx: Get rid of redundant qla_tgt_sess.tearing_down
  target: Un-export target_get_sess_cmd()
  sbp-target: Consolidate duplicated error path code in
    sbp_handle_command()
  target: Check sess_tearing_down in target_get_sess_cmd()
  qla2xxx: Remove racy, now-redundant check of sess_tearing_down
  target: Remove se_session.sess_wait_list
  target: Make unnecessarily global se_dev_align_max_sectors() static
  target: Add generation of LOGICAL BLOCK ADDRESS OUT OF RANGE
  target: Add range checking to UNMAP emulation
  target: Fix reading of data length fields for UNMAP commands
  target: Fix possible integer underflow in UNMAP emulation
  target: Check number of unmap descriptors against our limit
  target: Allow for target_submit_cmd() returning errors

Sachin Kamat (1):
  tcm_qla2xxx: Remove duplicate header file inclusion

 drivers/infiniband/ulp/srpt/ib_srpt.c              |   15 +-
 drivers/scsi/qla2xxx/qla_target.c                  |   16 +-
 drivers/scsi/qla2xxx/qla_target.h                  |    3 +-
 drivers/scsi/qla2xxx/tcm_qla2xxx.c                 |   55 +-
 drivers/target/Makefile                            |    3 +-
 drivers/target/iscsi/iscsi_target.c                |   30 +-
 drivers/target/iscsi/iscsi_target_configfs.c       |   22 -
 drivers/target/iscsi/iscsi_target_core.h           |    3 +-
 drivers/target/iscsi/iscsi_target_erl1.c           |    4 +-
 drivers/target/iscsi/iscsi_target_login.c          |   66 +-
 drivers/target/iscsi/iscsi_target_parameters.c     |    2 +-
 drivers/target/iscsi/iscsi_target_tmr.c            |   46 +-
 drivers/target/iscsi/iscsi_target_tpg.c            |   27 +-
 drivers/target/loopback/tcm_loop.c                 |   11 +-
 drivers/target/sbp/sbp_target.c                    |   39 +-
 drivers/target/target_core_device.c                |  170 +-
 drivers/target/target_core_fabric_configfs.c       |    3 +-
 drivers/target/target_core_file.c                  |   25 +-
 drivers/target/target_core_iblock.c                |  142 ++-
 drivers/target/target_core_iblock.h                |    1 +
 drivers/target/target_core_internal.h              |   22 +-
 drivers/target/target_core_pr.c                    |    6 +-
 drivers/target/target_core_pscsi.c                 |   84 +-
 drivers/target/target_core_rd.c                    |   17 +-
 drivers/target/target_core_sbc.c                   |  581 ++++++
 .../{target_core_cdb.c => target_core_spc.c}       |  434 ++---
 drivers/target/target_core_tmr.c                   |   57 +-
 drivers/target/target_core_tpg.c                   |   14 +-
 drivers/target/target_core_transport.c             | 2088 ++++----------------
 drivers/target/tcm_fc/tfc_cmd.c                    |   10 +-
 drivers/target/tcm_fc/tfc_io.c                     |   13 +-
 drivers/usb/gadget/tcm_usb_gadget.c                |   54 +-
 include/target/target_core_backend.h               |   17 +-
 include/target/target_core_base.h                  |   56 +-
 include/target/target_core_fabric.h                |   15 +-
 35 files changed, 1718 insertions(+), 2433 deletions(-)
 create mode 100644 drivers/target/target_core_sbc.c
 rename drivers/target/{target_core_cdb.c => target_core_spc.c} (76%)