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Message-ID: <20230816234303.3786178-7-kuba@kernel.org> Date: Wed, 16 Aug 2023 16:42:55 -0700 From: Jakub Kicinski <kuba@...nel.org> To: netdev@...r.kernel.org Cc: hawk@...nel.org, ilias.apalodimas@...aro.org, aleksander.lobakin@...el.com, linyunsheng@...wei.com, almasrymina@...gle.com, Jakub Kicinski <kuba@...nel.org> Subject: [RFC net-next 06/13] net: page_pool: stash the NAPI ID for easier access To avoid any issues with race conditions on accessing napi and having to think about the lifetime of NAPI objects in netlink GET - stash the napi_id to which page pool was linked at creation time. Signed-off-by: Jakub Kicinski <kuba@...nel.org> --- include/net/page_pool/types.h | 1 + net/core/page_pool_user.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h index b9db612708e4..3017557e0c59 100644 --- a/include/net/page_pool/types.h +++ b/include/net/page_pool/types.h @@ -195,6 +195,7 @@ struct page_pool { /* User-facing fields, protected by page_pools_lock */ struct { struct hlist_node list; + u32 napi_id; u32 id; } user; }; diff --git a/net/core/page_pool_user.c b/net/core/page_pool_user.c index 25977ce18e2b..6632fc19a86f 100644 --- a/net/core/page_pool_user.c +++ b/net/core/page_pool_user.c @@ -37,9 +37,11 @@ int page_pool_list(struct page_pool *pool) if (err < 0) goto err_unlock; - if (pool->slow.netdev) + if (pool->slow.netdev) { hlist_add_head(&pool->user.list, &pool->slow.netdev->page_pools); + pool->user.napi_id = pool->p.napi ? pool->p.napi->napi_id : 0; + } mutex_unlock(&page_pools_lock); return 0; -- 2.41.0
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