netdev - [PATCH v2 1/2] net: export netdev_get_by_index

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Message-ID: <20251029231654.1156874-2-dw@davidwei.uk>
Date: Wed, 29 Oct 2025 16:16:53 -0700
From: David Wei <dw@...idwei.uk>
To: io-uring@...r.kernel.org,
	netdev@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>,
	Pavel Begunkov <asml.silence@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>
Subject: [PATCH v2 1/2] net: export netdev_get_by_index_lock()

Need to call netdev_get_by_index_lock() from io_uring/zcrx.c, but it is
currently private to net. Export the function in linux/netdevice.h.

Signed-off-by: David Wei <dw@...idwei.uk>
---
 include/linux/netdevice.h | 1 +
 net/core/dev.c            | 1 +
 net/core/dev.h            | 1 -
 3 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d1a687444b27..77c46a2823ec 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3401,6 +3401,7 @@ struct net_device *dev_get_by_index(struct net *net, int ifindex);
 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
 struct net_device *netdev_get_by_index(struct net *net, int ifindex,
 				       netdevice_tracker *tracker, gfp_t gfp);
+struct net_device *netdev_get_by_index_lock(struct net *net, int ifindex);
 struct net_device *netdev_get_by_name(struct net *net, const char *name,
 				      netdevice_tracker *tracker, gfp_t gfp);
 struct net_device *netdev_get_by_flags_rcu(struct net *net, netdevice_tracker *tracker,
diff --git a/net/core/dev.c b/net/core/dev.c
index 2acfa44927da..7e4ef9a915f9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1089,6 +1089,7 @@ struct net_device *netdev_get_by_index_lock(struct net *net, int ifindex)
 
 	return __netdev_put_lock(dev, net);
 }
+EXPORT_SYMBOL(netdev_get_by_index_lock);
 
 struct net_device *
 netdev_get_by_index_lock_ops_compat(struct net *net, int ifindex)
diff --git a/net/core/dev.h b/net/core/dev.h
index 900880e8b5b4..df8a90fe89f8 100644
--- a/net/core/dev.h
+++ b/net/core/dev.h
@@ -29,7 +29,6 @@ struct napi_struct *
 netdev_napi_by_id_lock(struct net *net, unsigned int napi_id);
 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
 
-struct net_device *netdev_get_by_index_lock(struct net *net, int ifindex);
 struct net_device *__netdev_put_lock(struct net_device *dev, struct net *net);
 struct net_device *
 netdev_xa_find_lock(struct net *net, struct net_device *dev,
-- 
2.47.3