[dpdk-dev] [PATCH v6 69/70] malloc: enable validation before new page allocation

[Anatoly Burakov]

Before allocating a new page, give a chance to the user to
allow or deny allocation via callbacks.

Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
Tested-by: Santosh Shukla <santosh.shukla at caviumnetworks.com>
Tested-by: Hemant Agrawal <hemant.agrawal at nxp.com>
Tested-by: Gowrishankar Muthukrishnan <gowrishankar.m at linux.vnet.ibm.com>
---
 lib/librte_eal/common/malloc_heap.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/common/malloc_heap.c b/lib/librte_eal/common/malloc_heap.c
index 18c7b69..f8daf84 100644
--- a/lib/librte_eal/common/malloc_heap.c
+++ b/lib/librte_eal/common/malloc_heap.c
@@ -196,6 +196,15 @@ alloc_pages_on_heap(struct malloc_heap *heap, uint64_t pg_sz, size_t elt_size,
 	int allocd_pages;
 	void *ret, *map_addr;
 
+	alloc_sz = (size_t)pg_sz * n_segs;
+
+	/* first, check if we're allowed to allocate this memory */
+	if (eal_memalloc_mem_alloc_validate(socket,
+			heap->total_size + alloc_sz) < 0) {
+		RTE_LOG(DEBUG, EAL, "User has disallowed allocation\n");
+		return NULL;
+	}
+
 	allocd_pages = eal_memalloc_alloc_seg_bulk(ms, n_segs, pg_sz,
 			socket, true);
 
@@ -205,7 +214,6 @@ alloc_pages_on_heap(struct malloc_heap *heap, uint64_t pg_sz, size_t elt_size,
 
 	map_addr = ms[0]->addr;
 	msl = rte_mem_virt2memseg_list(map_addr);
-	alloc_sz = (size_t)msl->page_sz * allocd_pages;
 
 	/* check if we wanted contiguous memory but didn't get it */
 	if (contig && !eal_memalloc_is_contig(msl, map_addr, alloc_sz)) {
-- 
2.7.4