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authorAndreas Gruenbacher <agruenba@redhat.com>2017-03-18 02:36:15 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-22 03:52:45 +0300
commitf9fe1c12d126f9887441fa5bb165046f30ddd4b5 (patch)
tree446732ec6e2e3bec7859de1d7c79029608f504c7 /include/linux/rhashtable.h
parent9549c6c872beee08ddb5bb92715bfde3b7161a88 (diff)
downloadlinux-f9fe1c12d126f9887441fa5bb165046f30ddd4b5.tar.xz
rhashtable: Add rhashtable_lookup_get_insert_fast
Add rhashtable_lookup_get_insert_fast for fixed keys, similar to rhashtable_lookup_get_insert_key for explicit keys. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/rhashtable.h')
-rw-r--r--include/linux/rhashtable.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 092292b6675e..e507290cd2c7 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -916,6 +916,28 @@ static inline int rhashtable_lookup_insert_fast(
}
/**
+ * rhashtable_lookup_get_insert_fast - lookup and insert object into hash table
+ * @ht: hash table
+ * @obj: pointer to hash head inside object
+ * @params: hash table parameters
+ *
+ * Just like rhashtable_lookup_insert_fast(), but this function returns the
+ * object if it exists, NULL if it did not and the insertion was successful,
+ * and an ERR_PTR otherwise.
+ */
+static inline void *rhashtable_lookup_get_insert_fast(
+ struct rhashtable *ht, struct rhash_head *obj,
+ const struct rhashtable_params params)
+{
+ const char *key = rht_obj(ht, obj);
+
+ BUG_ON(ht->p.obj_hashfn);
+
+ return __rhashtable_insert_fast(ht, key + ht->p.key_offset, obj, params,
+ false);
+}
+
+/**
* rhashtable_lookup_insert_key - search and insert object to hash table
* with explicit key
* @ht: hash table