svn commit: r358357 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Wed Feb 26 20:38:48 2020
New Revision: 358357
URL: https://svnweb.freebsd.org/changeset/base/358357

Log:
  MFZoL: Relax restriction on zfs_ioc_next_obj() iteration
  
  Per the documentation for dnode_next_offset in dnode.c, the "txg"
  parameter specifies a lower bound on which transaction the dnode can
  be found in. We are interested in all dnodes that are removed between
  the first and last transaction in the snapshot. It doesn't need to be
  created in that snapshot to correspond to a removed file.
  
  In fact, the behavior of zfs diff in the test case exactly matches
  this: the transaction that created the data that was deleted in snapshot
  "2" was produced before, in snapshot "1", definitely predating the first
  transaction in snapshot "2".
  
  Signed-off-by: Brian Behlendorf <behlendorf1 at llnl.gov>
  Signed-off-by: Tim Chase <Tim Chase <tim at onlight.com>
  Closes #2081
  zfsonlinux/zfs at 7290cd3c4ed19fb3f75b8133db2e36afcdd24beb
  
  MFC after:	1 week

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c	Wed Feb 26 20:18:38 2020	(r358356)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c	Wed Feb 26 20:38:48 2020	(r358357)
@@ -5553,8 +5553,7 @@ zfs_ioc_next_obj(zfs_cmd_t *zc)
 	if (error != 0)
 		return (error);
 
-	error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
-	    dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg);
+	error = dmu_object_next(os, &zc->zc_obj, B_FALSE, 0);
 
 	dmu_objset_rele(os, FTAG);
 	return (error);