NEX-6276 SMB sparse file support
Reviewed by: Kevin Crowe <kevin.crowe@nexenta.com>
Reviewed by: Matt Barden <matt.barden@nexenta.com>
Reviewed by: Evan Layton <evan.layton@nexenta.com>
NEX-2604 Windows Explorer Stops Working / Crashes when Security Tab is accessed
NEX-2593 SMB2: unable to create folder with long filename on 4.0.3
NEX-2442 regression with smbtorture test raw.sfileinfo.rename
SMB-11 SMB2 message parse & dispatch
SMB-12 SMB2 Negotiate Protocol
SMB-13 SMB2 Session Setup
SMB-14 SMB2 Logoff
SMB-15 SMB2 Tree Connect
SMB-16 SMB2 Tree Disconnect
SMB-17 SMB2 Create
SMB-18 SMB2 Close
SMB-19 SMB2 Flush
SMB-20 SMB2 Read
SMB-21 SMB2 Write
SMB-22 SMB2 Lock/Unlock
SMB-23 SMB2 Ioctl
SMB-24 SMB2 Cancel
SMB-25 SMB2 Echo
SMB-26 SMB2 Query Dir
SMB-27 SMB2 Change Notify
SMB-28 SMB2 Query Info
SMB-29 SMB2 Set Info
SMB-30 SMB2 Oplocks
SMB-53 SMB2 Create Context options
(SMB2 code review cleanup 1, 2, 3)

*** 8,18 ****
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
   */
  
  /*
   * Dispatch function for SMB2_SET_INFO
   *
--- 8,18 ----
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2016 Nexenta Systems, Inc.  All rights reserved.
   */
  
  /*
   * Dispatch function for SMB2_SET_INFO
   *
*** 261,271 ****
          int rc;
  
          if (smb_mbc_decodef(&si->si_data, "q", &eod) != 0)
                  return (NT_STATUS_INFO_LENGTH_MISMATCH);
  
!         rc = smb_fsop_set_data_length(sr, of->f_cr, of->f_node, eod);
          if (rc != 0)
                  return (smb_errno2status(rc));
  
          return (0);
  }
--- 261,275 ----
          int rc;
  
          if (smb_mbc_decodef(&si->si_data, "q", &eod) != 0)
                  return (NT_STATUS_INFO_LENGTH_MISMATCH);
  
!         /*
!          * Zero out data from EoD to end of file.
!          * (Passing len=0 covers to end of file)
!          */
!         rc = smb_fsop_freesp(sr, of->f_cr, of, eod, 0);
          if (rc != 0)
                  return (smb_errno2status(rc));
  
          return (0);
  }