6536 zfs send: want a way to disable sending of free records
Reviewed by: Alexander Stetsenko <astetsenko@racktopsystems.com>
Reviewed by: Kim Shrier <kshrier@racktopsystems.com>

*** 23,32 ****
--- 23,33 ----
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   * Copyright (c) 2013 Steven Hartland. All rights reserved.
   * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
+  * Copyright 2015 RackTop Systems.
   */
  
  #include <assert.h>
  #include <ctype.h>
  #include <errno.h>
*** 812,821 ****
--- 813,823 ----
          char prevsnap[ZFS_MAXNAMELEN];
          uint64_t prevsnap_obj;
          boolean_t seenfrom, seento, replicate, doall, fromorigin;
          boolean_t verbose, dryrun, parsable, progress, embed_data, std_out;
          boolean_t large_block;
+         boolean_t skip_free;
          int outfd;
          boolean_t err;
          nvlist_t *fss;
          nvlist_t *snapholds;
          avl_tree_t *fsavl;
*** 1182,1191 ****
--- 1184,1195 ----
                  enum lzc_send_flags flags = 0;
                  if (sdd->large_block)
                          flags |= LZC_SEND_FLAG_LARGE_BLOCK;
                  if (sdd->embed_data)
                          flags |= LZC_SEND_FLAG_EMBED_DATA;
+                 if (sdd->skip_free)
+                         flags |= LZC_SEND_FLAG_SKIP_FREE;
  
                  err = dump_ioctl(zhp, sdd->prevsnap, sdd->prevsnap_obj,
                      fromorigin, sdd->outfd, flags, sdd->debugnv);
  
                  if (sdd->progress) {
*** 1748,1757 ****
--- 1752,1762 ----
          sdd.verbose = flags->verbose;
          sdd.parsable = flags->parsable;
          sdd.progress = flags->progress;
          sdd.dryrun = flags->dryrun;
          sdd.large_block = flags->largeblock;
+         sdd.skip_free = flags->skip_free;
          sdd.embed_data = flags->embed_data;
          sdd.filter_cb = filter_func;
          sdd.filter_cb_arg = cb_arg;
          if (debugnvp)
                  sdd.debugnv = *debugnvp;