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Illumos #3104: eliminate empty bpobjs

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3104 eliminate empty bpobjs
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Christopher Siden <chris.siden@delphix.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Eric Schrock <eric.schrock@delphix.com>

References:
  illumos/illumos-gate@f174573681
  illumos changeset: 13782:8f78aae28a63
  https://www.illumos.org/issues/3104

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Matthew Ahrens
2012-12-23 15:57:14 -08:00
committed by Brian Behlendorf
parent 91579709fc
commit 753c38392d
12 changed files with 166 additions and 11 deletions
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module/zfs/zfeature.c
+6 -1
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@@ -229,7 +229,12 @@ feature_get_refcount(objset_t *os, uint64_t read_obj, uint64_t write_obj,
uint64_t refcount;
uint64_t zapobj = feature->fi_can_readonly ? write_obj : read_obj;
ASSERT(0 != zapobj);
/*
* If the pool is currently being created, the feature objects may not
* have been allocated yet. Act as though all features are disabled.
*/
if (zapobj == 0)
return (ENOTSUP);
err = zap_lookup(os, zapobj, feature->fi_guid, sizeof (uint64_t), 1,
&refcount);