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Add zap_prefetch() interface

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Provide a generic interface to prefetch ZAP entries by name.  This
functionality is being added for external consumers such as Lustre.
It is based of the existing zap_prefetch_uint64() version which is
used by the deduplication code.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes #4061
This commit is contained in:
Brian Behlendorf
2014-05-09 14:51:20 -07:00
parent 917b8c5cec
commit 072484504f
2 changed files with 24 additions and 0 deletions
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include/sys/zap.h
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@@ -213,6 +213,7 @@ int zap_lookup_norm(objset_t *ds, uint64_t zapobj, const char *name,
int zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf);
int zap_contains(objset_t *ds, uint64_t zapobj, const char *name);
int zap_prefetch(objset_t *os, uint64_t zapobj, const char *name);
int zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints);