diff mbox series

[bpf-next,v4,2/7] page_pool: Add callback to init pages when they are allocated

Message ID 20211217002741.146797-3-toke@redhat.com (mailing list archive)
State New, archived
Delegated to: BPF
Headers show
Series Add support for transmitting packets using XDP in bpf_prog_run() | expand


Context Check Description
bpf/vmtest-bpf-next-PR success PR summary
netdev/tree_selection success Clearly marked for bpf-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 6001 this patch: 6001
netdev/cc_maintainers success CCed 14 of 14 maintainers
netdev/build_clang success Errors and warnings before: 1024 this patch: 1024
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 6152 this patch: 6152
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 16 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
bpf/vmtest-bpf-next success VM_Test

Commit Message

Toke Høiland-Jørgensen Dec. 17, 2021, 12:27 a.m. UTC
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 <toke@redhat.com>
 include/net/page_pool.h | 2 ++
 net/core/page_pool.c    | 2 ++
 2 files changed, 4 insertions(+)
diff mbox series


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)