From: Jakub Kicinski <kuba@kernel•org>
To: davem@davemloft•net
Cc: netdev@vger•kernel.org, edumazet@google•com, pabeni@redhat•com,
almasrymina@google•com, hawk@kernel•org,
ilias.apalodimas@linaro•org, dsahern@gmail•com,
dtatulea@nvidia•com, Jakub Kicinski <kuba@kernel•org>
Subject: [PATCH net-next v2 06/15] net: page_pool: stash the NAPI ID for easier access
Date: Mon, 20 Nov 2023 16:00:39 -0800 [thread overview]
Message-ID: <20231121000048.789613-7-kuba@kernel.org> (raw)
In-Reply-To: <20231121000048.789613-1-kuba@kernel.org>
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@kernel•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 b258a571201e..7e47d7bb2c1e 100644
--- a/include/net/page_pool/types.h
+++ b/include/net/page_pool/types.h
@@ -193,6 +193,7 @@ 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 1591dbd66d51..23074d4c75fc 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;
--
2.42.0
next prev parent reply other threads:[~2023-11-21 0:01 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-21 0:00 [PATCH net-next v2 00/15] net: page_pool: add netlink-based introspection Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 01/15] net: page_pool: split the page_pool_params into fast and slow Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 02/15] net: page_pool: avoid touching slow on the fastpath Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 03/15] net: page_pool: factor out uninit Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 04/15] net: page_pool: id the page pools Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 05/15] net: page_pool: record pools per netdev Jakub Kicinski
2023-11-21 0:00 ` Jakub Kicinski [this message]
2023-11-21 0:00 ` [PATCH net-next v2 07/15] eth: link netdev to page_pools in drivers Jakub Kicinski
2023-11-21 13:13 ` kernel test robot
2023-11-21 21:25 ` kernel test robot
2023-11-21 0:00 ` [PATCH net-next v2 08/15] net: page_pool: add nlspec for basic access to page pools Jakub Kicinski
2023-11-21 18:24 ` Willem de Bruijn
2023-11-21 20:37 ` Jakub Kicinski
2023-11-21 21:33 ` Willem de Bruijn
2023-11-21 22:00 ` Jakub Kicinski
2023-11-21 22:49 ` David Ahern
2023-11-21 23:42 ` Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 09/15] net: page_pool: implement GET in the netlink API Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 10/15] net: page_pool: add netlink notifications for state changes Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 11/15] net: page_pool: report amount of memory held by page pools Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 12/15] net: page_pool: report when page pool was destroyed Jakub Kicinski
2023-11-21 20:45 ` Jesper Dangaard Brouer
2023-11-21 21:49 ` Jakub Kicinski
2023-11-22 8:53 ` Jesper Dangaard Brouer
2023-11-21 0:00 ` [PATCH net-next v2 13/15] net: page_pool: expose page pool stats via netlink Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 14/15] net: page_pool: mute the periodic warning for visible page pools Jakub Kicinski
2023-11-21 0:00 ` [PATCH net-next v2 15/15] tools: ynl: add sample for getting page-pool information Jakub Kicinski
2023-11-22 1:31 ` [PATCH net-next v2 00/15] net: page_pool: add netlink-based introspection Jakub Kicinski
2023-11-22 8:45 ` Jesper Dangaard Brouer
2023-11-22 1:40 ` patchwork-bot+netdevbpf
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