env: Add SPDK wrapper for rte_mempool_get_bulk()

Needed for crypto vbdev work.

Change-Id: Ib18ce3aaecf2388cf2cdc4dea110db514c8c1f1b
Signed-off-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/408256
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## v18.04: (Upcoming Release)
 
+## Env
+
+Add wrapper for DPDK rte_mempool_get_bulk() via spdk_mempool_get_bulk().
+
 ### Bdev
 
 Add new optional bdev module interface function, init_complete, to notify bdev modules

include/spdk/env.h

@@ -284,6 +284,17 @@ void spdk_mempool_free(struct spdk_mempool *mp);
  */
 void *spdk_mempool_get(struct spdk_mempool *mp);
 
+/**
+ * Get multiple elements from a memory pool.
+ *
+ * \param mp Memory pool to get multiple elements from.
+ * \param ele_arr Array of the elements to fill.
+ * \param count Count of elements to get.
+ *
+ * \return 0 on success, negative errno on failure.
+ */
+int spdk_mempool_get_bulk(struct spdk_mempool *mp, void **ele_arr, size_t count);
+
 /**
  * Put an element back into the memory pool.
  *

lib/env_dpdk/env.c

@@ -224,6 +224,12 @@ spdk_mempool_get(struct spdk_mempool *mp)
 	return ele;
 }
 
+int
+spdk_mempool_get_bulk(struct spdk_mempool *mp, void **ele_arr, size_t count)
+{
+	return rte_mempool_get_bulk((struct rte_mempool *)mp, ele_arr, count);
+}
+
 void
 spdk_mempool_put(struct spdk_mempool *mp, void *ele)
 {