[PATCH 4/4] radix tree test suite: Add support for slab bulk APIs

[Liam Howlett <liam.howlett@oracle.com>]

Add support for kmem_cache_free_bulk() and kmem_cache_alloc_bulk() to
the radix tree test suite.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 tools/testing/radix-tree/linux.c      | 61 +++++++++++++++++++++++++++
 tools/testing/radix-tree/linux/slab.h |  3 ++
 2 files changed, 64 insertions(+)

diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c
index 7225b5c46bb6..726407f934d3 100644
--- a/tools/testing/radix-tree/linux.c
+++ b/tools/testing/radix-tree/linux.c
@@ -93,6 +93,67 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
 	pthread_mutex_unlock(&cachep->lock);
 }
 
+void kmem_cache_free_bulk(struct kmem_cache *cachep, size_t size, void **list)
+{
+	if (kmalloc_verbose)
+		printk("Bulk free %p[0-%lu]\n", list, size - 1);
+
+	for (int i = 0; i < size; i++)
+		kmem_cache_free(cachep, list[i]);
+}
+
+int kmem_cache_alloc_bulk(struct kmem_cache *cachep, gfp_t gfp, size_t size,
+			  void **p)
+{
+	size_t i;
+
+	if (kmalloc_verbose)
+		printk("Bulk alloc %lu\n", size);
+
+	if (!(gfp & __GFP_DIRECT_RECLAIM)) {
+		if (cachep->non_kernel < size)
+			return 0;
+
+		cachep->non_kernel -= size;
+	}
+
+	pthread_mutex_lock(&cachep->lock);
+	if (cachep->nr_objs >= size) {
+		struct radix_tree_node *node = cachep->objs;
+
+		for (i = 0; i < size; i++) {
+			cachep->nr_objs--;
+			cachep->objs = node->parent;
+			p[i] = cachep->objs;
+		}
+		pthread_mutex_unlock(&cachep->lock);
+		node->parent = NULL;
+	} else {
+		pthread_mutex_unlock(&cachep->lock);
+		for (i = 0; i < size; i++) {
+			if (cachep->align) {
+				posix_memalign(&p[i], cachep->align,
+					       cachep->size * size);
+			} else {
+				p[i] = malloc(cachep->size * size);
+			}
+			if (cachep->ctor)
+				cachep->ctor(p[i]);
+			else if (gfp & __GFP_ZERO)
+				memset(p[i], 0, cachep->size);
+		}
+	}
+
+	for (i = 0; i < size; i++) {
+		uatomic_inc(&nr_allocated);
+		uatomic_inc(&nr_tallocated);
+		if (kmalloc_verbose)
+			printf("Allocating %p from slab\n", p[i]);
+	}
+
+	return size;
+}
+
 void *kmalloc(size_t size, gfp_t gfp)
 {
 	void *ret;
diff --git a/tools/testing/radix-tree/linux/slab.h b/tools/testing/radix-tree/linux/slab.h
index 2958830ce4d7..de3befdf14df 100644
--- a/tools/testing/radix-tree/linux/slab.h
+++ b/tools/testing/radix-tree/linux/slab.h
@@ -24,4 +24,7 @@ struct kmem_cache *kmem_cache_create(const char *name, unsigned int size,
 			unsigned int align, unsigned int flags,
 			void (*ctor)(void *));
 
+void kmem_cache_free_bulk(struct kmem_cache *cachep, size_t, void **);
+int kmem_cache_alloc_bulk(struct kmem_cache *cachep, gfp_t, size_t, void **);
+
 #endif		/* SLAB_H */
-- 
2.30.2