[Bug 1445038] Re: TGT does not support ISER discovery

[Rafael David Tinoco]

*** This bug is a duplicate of bug 1409904 ***
    https://bugs.launchpad.net/bugs/1409904

Please follow case:

https://bugs.launchpad.net/ubuntu/+source/libibverbs/+bug/1409904

For the fixes and SRU (because of inter-dependencies).

I'm marking this case as "duplicate" so the BIGGER SRU can be done
together.

** This bug has been marked a duplicate of bug 1409904
   Needed patches for IB: Support for Flow Steering and Offload Support

** Patch removed: "trusty_tgt_1.0.43-0ubuntu5.debdiff"
   https://bugs.launchpad.net/tgt-project/+bug/1445038/+attachment/4377356/+files/trusty_tgt_1.0.43-0ubuntu5.debdiff

** Patch removed: "utopic_tgt_1.0.43-0ubuntu5.debdiff"
   https://bugs.launchpad.net/tgt-project/+bug/1445038/+attachment/4377532/+files/utopic_tgt_1.0.43-0ubuntu5.debdiff

** Patch removed: "vivid_tgt_1.0.43-0ubuntu5.debdiff"
   https://bugs.launchpad.net/tgt-project/+bug/1445038/+attachment/4377533/+files/vivid_tgt_1.0.43-0ubuntu5.debdiff

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https://bugs.launchpad.net/bugs/1445038

Title:
  TGT does not support ISER discovery

Status in tgt-project:
  In Progress

Bug description:
  [Impact]

   * TGT does not support iSER discovery and suffers from segmentation fault
      whenever a open-iscsi client tries do discover targets using iSER (iSCSI over IB).

  [Test Case]

  ### server (IPoverIB interface IP: 172.16.0.1)

  # echo manual > /etc/init/tgt.override
  # apt-get install tgt
  # tgtd
  # tgt-setup-lun -n lunit1 -d /disks/lunit1 -t iser

  ### client (IPoverIB interface IP: 172.16.0.2)

  # apt-get install open-iscsi
  # iscsiadm -m discovery --op=show --type sendtargets --portal 172.16.0.1 -I iser

  /var/log/syslog:

  tgtd: tgtd daemon started, pid:11274
  tgtd: tgtd logger started, pid:11275 debug:0
  tgtd: work_timer_start(150) use signal based scheduler
  tgtd: bs_init(390) use signalfd notification
  tgtd: device_mgmt(246) sz:19 params:path=/disks/lunit1
  tgtd: bs_thread_open(412) 16
  tgtd: iser_alloc_pool(572) shmget rdma pool sz:1073741824 failed
  tgtd: iser_cm_conn_established(1615) conn:0x19f06a0 cm_id:0x19f00d0, 172.16.0.2 -> 172.16.0.1, established
  kernel: [233439.714120] tgtd[11274] segfault at 0 ip 00007fc36a5b3abf sp 00007ffefb551be0 error 4 in librdmacm.so.1.0.0[7fc36a5ae000+d000]
  tgtd: handle_wc_error(2978) conn:0x19fce10 task:0x19f2e60 tag:0x0000 wr_id:0x0x19f2ec0 op:recv err:local protection error vendor_err:0x32
  tgtd: tgtd logger exits abnormally, pid:11275

  [Regression Potential]

   * Tested multiple times in a Infiniband lab environment provided by Mellanox
   * For open-iscsi to work with iSER kernel 3.16 should be used
   * Watch bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1443648 for 3.13 fix on iSER iscsi logout bug (to be fixed)

  [Other Info]

  Original case: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1443648
  Marked as duplicate of this

  Upstream commit:

  commit 4a4268bc3a458be0190709bdd7f13392f91ca15f
  Author: Or Gerlitz <ogerlitz at mellanox.com>
  Date:   Tue Jan 28 11:17:59 2014 +0200

      iser: Add Discovery support

      Add support to handle TEXT PDU, such as SendTargets which are used for
      running iscsi discovery over iser.

      Signed-off-by: Or Gerlitz <ogerlitz at mellanox.com>
      Signed-off-by: Alexander Nezhinsky <nezhinsky at gmail.com>
      Signed-off-by: FUJITA Tomonori <fujita.tomonori at lab.ntt.co.jp>

  Has to be backported to TGT.

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