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Handle zap_lookup() failure in ddt_object_load()

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Failing to lookup a name in the spa_ddt_stat_object should not result
in a panic in ddt_object_load().  The error can be safely returned to
the caller for handling resulting in a useful user error message.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3370
This commit is contained in:
Brian Behlendorf 2015-08-18 11:20:22 -07:00
parent 9f5ba90f9f
commit ff9b1d0725
1 changed files with 4 additions and 3 deletions
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7
module/zfs/ddt.c
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@ -115,13 +115,14 @@ ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
error = zap_lookup(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, name,
sizeof (uint64_t), 1, &ddt->ddt_object[type][class]);
if (error != 0)
return (error);
VERIFY0(zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name,
error = zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name,
sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t),
&ddt->ddt_histogram[type][class]));
&ddt->ddt_histogram[type][class]);
if (error != 0)
return (error);
/*
* Seed the cached statistics.