Commit 12b6c3a0 authored by Jakub Kicinski's avatar Jakub Kicinski
Browse files

net: page_pool: support error injection 



Because of caching / recycling using the general page allocation
failures to induce errors in page pool allocation is very hard.
Add direct error injection support to page_pool_alloc_pages().

Reviewed-by: default avatarWillem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20240429144426.743476-2-kuba@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent f581bcf0

net/core/page_pool.c

+2 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
 *	Copyright (C) 2016 Red Hat, Inc.

 */



#include <linux/error-injection.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/slab.h>
@@ -550,6 +551,7 @@ struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp) 
	return page;

}

EXPORT_SYMBOL(page_pool_alloc_pages);

ALLOW_ERROR_INJECTION(page_pool_alloc_pages, NULL);



/* Calculate distance between two u32 values, valid if distance is below 2^(31)

 *  https://en.wikipedia.org/wiki/Serial_number_arithmetic#General_Solution