[PATCH bpf-next v4 2/7] page_pool: Add callback to init pages when they are allocated
From: Toke Høiland-Jørgensen <hidden>
Date: 2021-12-17 00:27:58
Also in:
bpf
Subsystem:
networking [general], page pool, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Jesper Dangaard Brouer, Ilias Apalodimas, Linus Torvalds
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. Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Toke Høiland-Jørgensen <redacted> --- include/net/page_pool.h | 2 ++ net/core/page_pool.c | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index a4082406a003..d807b6800a4a 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h@@ -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 {
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 1a6978427d6c..f53786f6666d 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c@@ -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)
--
2.34.1