Commit 35b2e549 authored by Toke Høiland-Jørgensen's avatar Toke Høiland-Jørgensen Committed by Alexei Starovoitov
Browse files

page_pool: Add callback to init pages when they are allocated 



Add a new callback function to page_pool that, if set, will be called every
time a new page is allocated. This will be used from bpf_test_run() to
initialise the page data with the data provided by userspace when running
XDP programs with redirect turned on.

Signed-off-by: default avatarToke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Acked-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/20220103150812.87914-3-toke@redhat.com
parent 4a48ef70

include/net/page_pool.h

+2 −0
Original line number Diff line number Diff line
@@ -80,6 +80,8 @@ struct page_pool_params { 
	enum dma_data_direction dma_dir; /* DMA mapping direction */

	unsigned int	max_len; /* max DMA sync memory size */

	unsigned int	offset;  /* DMA addr offset */

	void (*init_callback)(struct page *page, void *arg);

	void *init_arg;

};



struct page_pool {

net/core/page_pool.c

+2 −0
Original line number Diff line number Diff line
@@ -217,6 +217,8 @@ static void page_pool_set_pp_info(struct page_pool *pool, 
{

	page->pp = pool;

	page->pp_magic |= PP_SIGNATURE;

	if (pool->p.init_callback)

		pool->p.init_callback(page, pool->p.init_arg);

}



static void page_pool_clear_pp_info(struct page *page)