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page_pool: Add callback to init pages when they are allocated

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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: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/20220103150812.87914-3-toke@redhat.com
This commit is contained in:
Toke Høiland-Jørgensen 2022-01-03 16:08:07 +01:00 committed by Alexei Starovoitov
parent 4a48ef70b9
commit 35b2e54989
2 changed files with 4 additions and 0 deletions
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2
include/net/page_pool.h
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@ -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 {

2
net/core/page_pool.c
View File

@ -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)