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[Tim Gardner <tim.gardner@xxxxxxxxxxxxx>]

** Also affects: linux (Ubuntu Utopic)
   Importance: High
       Status: Triaged

** Changed in: linux (Ubuntu Utopic)
       Status: Triaged => Fix Committed

** Changed in: linux (Ubuntu Utopic)
     Assignee: (unassigned) => Andy Whitcroft (apw)

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https://bugs.launchpad.net/bugs/1347169

Title:
  Various storvsc bug fixes.

Status in “linux” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Committed

Bug description:
  
  Over last week we have made changes and fix bugs in storvsc , please include these patch set . 

  [PATCH V3 1/7] Drivers: scsi: storvsc: Change the limits to reflect the values
  on the host    In Hyper-V, each port/path/target maps to 1 scsi host adapter. 
  In reality, the path/target is not used (ie always set to 0) so our scsi host
  adapter essentially has 1 bus with 1 target that contains up to 256 luns.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=01a1fc6a17a33edc6b43aca255b31f51497e2414

  [PATCH V3 2/7] Drivers: scsi: storvsc: Set cmd_per_lun to reflect value
  supported by the Host    Set cmd_per_lun to reflect value supported by the
  Host.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=4a1e22529bda70eacde631bf4611b61b7aac9ae6

  [PATCH V3 3/7] Drivers: scsi: storvsc: Filter commands based on the storage
  protocol version
  Going forward it is possible that some of the commands that are not currently
  implemented will be implemented on future Windows hosts. Even if they are not
  implemented, we are told the host will corrrectly handle unsupported
  commands (by returning appropriate return code and sense information).
  Make command filtering depend on the host version.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=5aacedc1953dcaa1434a179147861319c919503e

  [PATCH V3 4/7] Drivers: scsi: storvsc: Fix a bug in handling VMBUS protocol
  version
  Based on the negotiated VMBUS protocol version, we adjust the size of the
  storage protocol messages. The two sizes we currently handle are pre-win8 and
  post-win8. In WS2012 R2, we are negotiating higher VMBUS protocol version than
  the win8 version. Make adjustments to correctly handle this.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=0d0da066835a1194f3a6c425054db90b089e74ea

  [PATCH 5/7] Drivers: scsi: storvsc: Implement a timedout handler
      On Azure, we have seen instances of unbounded I/O latencies. To deal with
  this issue, implement handler that can reset the timeout. Note that the
  host gaurantees that it will respond to each command that has been issued.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=ec5dafb2361fb393e12745bda837707be2041436

  [PATCH 6/7] drivers: scsi: storvsc: Set srb_flags in all cases
  Correctly set SRB flags for all valid I/O directions. Some IHV drivers on the
  Windows host require this. The host validates the command and SRB flags
  prior to passing the command down to native driver stack.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=20e9f28dd87e62d10f2c434396c734da43329c57

  [PATCH 7/7] drivers: scsi: storvsc: Correctly handle TEST_UNIT_READY failure
  On some Windows hosts on FC SANs, TEST_UNIT_READY can return SRB_STATUS_ERROR.
  Correctly handle this. Note that there is sufficient sense information to
  support scsi error handling even in this case.

  http://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=27ac92916691eab6c9ca74db19a4b13084d5c78d

  Thanks,
  Abhishek

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