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Fix unallocated object detection for large_dnode datasets

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Fix dmu_object_next() to correctly handle unallocated objects on
large_dnode datasets.

We implement this by scanning the dnode block until we find the correct
offset to be used in dnode_next_offset(). This is necessary because we
can't assume *objectp is a hole even if dmu_object_info() returns
ENOENT.

This fixes a couple of issues with zfs receive on large_dnode datasets.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #5027 
Closes #5532
This commit is contained in:
LOLi
2017-01-14 00:47:34 +01:00
committed by Brian Behlendorf
parent 5043684ae5
commit 08f0510d87
3 changed files with 42 additions and 19 deletions
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module/zfs/dnode.c
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@@ -1184,6 +1184,7 @@ dnode_is_free(dmu_buf_impl_t *db, int idx, int slots)
* errors:
* EINVAL - invalid object number.
* ENOSPC - hole too small to fulfill "slots" request
* ENOENT - the requested dnode is not allocated
* EIO - i/o error.
* succeeds even for free dnodes.
*/