Author: avg
Date: Wed Dec  4 14:50:43 2013
New Revision: 258923
URL: http://svnweb.freebsd.org/changeset/base/258923

Log:
  4188 assertion failed in dmu_tx_hold_free(): dn_datablkshift != 0
  
  illumos/illumos-gate@bb411a08b05466bfe0c7095b6373bbc1587e259a

Modified:
  vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_tx.c

Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_tx.c
==============================================================================
--- vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_tx.c  Wed Dec  4 14:49:20 
2013        (r258922)
+++ vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_tx.c  Wed Dec  4 14:50:43 
2013        (r258923)
@@ -635,9 +635,16 @@ dmu_tx_hold_free(dmu_tx_t *tx, uint64_t 
                uint64_t start = off >> shift;
                uint64_t end = (off + len) >> shift;
 
-               ASSERT(dn->dn_datablkshift != 0);
                ASSERT(dn->dn_indblkshift != 0);
 
+               /*
+                * dnode_reallocate() can result in an object with indirect
+                * blocks having an odd data block size.  In this case,
+                * just check the single block.
+                */
+               if (dn->dn_datablkshift == 0)
+                       start = end = 0;
+
                zio = zio_root(tx->tx_pool->dp_spa,
                    NULL, NULL, ZIO_FLAG_CANFAIL);
                for (uint64_t i = start; i <= end; i++) {
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