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Relax restriction on zfs_ioc_next_obj() iteration

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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@llnl.gov>
Signed-off-by: Tim Chase <Tim Chase <tim@onlight.com>
Closes #2081
This commit is contained in:
Antonio Russo 2015-05-13 07:16:42 -07:00 committed by Brian Behlendorf
parent fd0fd6467b
commit 7290cd3c4e
1 changed files with 1 additions and 2 deletions
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3
module/zfs/zfs_ioctl.c
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@ -4724,8 +4724,7 @@ 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);