[Scst-devel] [PATCH 0/9] iSER support for SCST

These patches implement iSER (iSCSI Extensions for RDMA) support for SCST.
In order to have an additional transport, iSCSI code is refactored and a transport API is introduced
to support TCP and RDMA transports living side by side.

There is a new isert-scst.ko module and changes to iscsi-scstd.

Both MLNX_OFED and OFED are supported as well.

Benchmarks show close to 1M iops and line rate bandwidth for 56GB IB and 40GB RoCE.

The code underwent a number of internal reviews as well as HA and stress testing.

Tested scenarios include:
 * Data integrity tests using fio
 * Multipath failover
 * 100 targets on 4 IB devices
 * Reset SCSI device on initiator during IO
 * Multiple initiator fail scenarios during login phase
 * CHAP authentication
 * Discovery over iSER

Changes from last internal version:
 * Lowered memory footprint per iSER connection
 * Do not use alloc_pages(), since memory fragmentation will cause failure to allocate after long run
 * Remove unused abstractions from transport API
 * Allow discovery over iSER
 * Gracefully handle multiple error conditions upon login (especially when initiator crashes)
 * Fixed a few issues found due to extensive HA tesing
 * Handle RDMA_CM_EVENT_DEVICE_REMOVAL
 * Enabled CHAP authentication over iSER
 * Some minor optimizations

Yan Burman (9):
  iscsi: Add iSCSI transport API
  iscsi: Move TCP code over to transport API
  iscsi: Export some functions needed by isert and refactor code for
    reuse
  isert: Add initial isert code
  iscsid: Add start/stop transmit abstraction
  iscsid: Refactor code for iser reuse
  iscsid: Implement iser support
  scstadmin: Load isert-scst if iscsi is present
  scst: Add iSER module to RPM build

 iscsi-scst/Makefile                             |   76 +-
 iscsi-scst/README.iser_ofed                     |  117 ++
 iscsi-scst/include/iscsi_scst.h                 |    7 +
 iscsi-scst/include/iscsit_transport.h           |   65 +
 iscsi-scst/include/isert_scst.h                 |   24 +
 iscsi-scst/kernel/Makefile                      |    3 +-
 iscsi-scst/kernel/conn.c                        |  160 +--
 iscsi-scst/kernel/iscsi.c                       |  453 ++++---
 iscsi-scst/kernel/iscsi.h                       |   29 +-
 iscsi-scst/kernel/iscsi_dbg.h                   |    6 +
 iscsi-scst/kernel/iscsit_transport.c            |   64 +
 iscsi-scst/kernel/isert-scst/Kconfig            |    8 +
 iscsi-scst/kernel/isert-scst/Makefile           |   40 +
 iscsi-scst/kernel/isert-scst/Makefile.in-kernel |    4 +
 iscsi-scst/kernel/isert-scst/TODO               |   10 +
 iscsi-scst/kernel/isert-scst/iser.h             |  315 +++++
 iscsi-scst/kernel/isert-scst/iser_buf.c         |  303 +++++
 iscsi-scst/kernel/isert-scst/iser_datamover.c   |  296 +++++
 iscsi-scst/kernel/isert-scst/iser_datamover.h   |   60 +
 iscsi-scst/kernel/isert-scst/iser_global.c      |  161 +++
 iscsi-scst/kernel/isert-scst/iser_hdr.h         |   27 +
 iscsi-scst/kernel/isert-scst/iser_pdu.c         |  568 +++++++++
 iscsi-scst/kernel/isert-scst/iser_rdma.c        | 1544 +++++++++++++++++++++++
 iscsi-scst/kernel/isert-scst/isert.c            |  536 ++++++++
 iscsi-scst/kernel/isert-scst/isert.h            |  137 ++
 iscsi-scst/kernel/isert-scst/isert_dbg.h        |   50 +
 iscsi-scst/kernel/isert-scst/isert_login.c      |  940 ++++++++++++++
 iscsi-scst/kernel/nthread.c                     |   48 +-
 iscsi-scst/kernel/param.c                       |   20 +-
 iscsi-scst/kernel/target.c                      |   10 +
 iscsi-scst/usr/ctldev.c                         |   51 +-
 iscsi-scst/usr/iscsi_scstd.c                    |  219 +++-
 iscsi-scst/usr/iscsid.c                         |   29 +
 iscsi-scst/usr/iscsid.h                         |    9 +
 iscsi-scst/usr/misc.c                           |   65 +
 iscsi-scst/usr/misc.h                           |    1 +
 iscsi-scst/usr/param.c                          |    8 +
 iscsi-scst/usr/target.c                         |    3 +-
 scst.spec.in                                    |    1 +
 scstadmin/init.d/scst                           |    1 +
 40 files changed, 6138 insertions(+), 330 deletions(-)
 create mode 100644 iscsi-scst/README.iser_ofed
 create mode 100644 iscsi-scst/include/iscsit_transport.h
 create mode 100644 iscsi-scst/include/isert_scst.h
 create mode 100644 iscsi-scst/kernel/iscsit_transport.c
 create mode 100644 iscsi-scst/kernel/isert-scst/Kconfig
 create mode 100644 iscsi-scst/kernel/isert-scst/Makefile
 create mode 100644 iscsi-scst/kernel/isert-scst/Makefile.in-kernel
 create mode 100644 iscsi-scst/kernel/isert-scst/TODO
 create mode 100644 iscsi-scst/kernel/isert-scst/iser.h
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_buf.c
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_datamover.c
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_datamover.h
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_global.c
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_hdr.h
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_pdu.c
 create mode 100644 iscsi-scst/kernel/isert-scst/iser_rdma.c
 create mode 100644 iscsi-scst/kernel/isert-scst/isert.c
 create mode 100644 iscsi-scst/kernel/isert-scst/isert.h
 create mode 100644 iscsi-scst/kernel/isert-scst/isert_dbg.h
 create mode 100644 iscsi-scst/kernel/isert-scst/isert_login.c

-- 
1.7.10.1