diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-01-14 19:53:14 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-01-15 19:13:34 -0800 |
| commit | 413f0271f3966e0c73d4937963f19335af19e628 (patch) | |
| tree | 2dbbae26011130382d7864b13982b04d447c5e11 /include/linux/netdevice.h | |
| parent | 1b23cdbd2bbc4b40e21c12ae86c2781e347ff0f8 (diff) | |
net: protect NAPI enablement with netdev_lock()
Wrap napi_enable() / napi_disable() with netdev_lock().
Provide the "already locked" flavor of the API.
iavf needs the usual adjustment. A number of drivers call
napi_enable() under a spin lock, so they have to be modified
to take netdev_lock() first, then spin lock then call
napi_enable_locked().
Protecting napi_enable() implies that napi->napi_id is protected
by netdev_lock().
Acked-by: Francois Romieu <romieu@fr.zoreil.com> # via-velocity
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250115035319.559603-7-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 3130a8c807dd..3941e4d0073e 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -382,7 +382,7 @@ struct napi_struct { struct sk_buff *skb; struct list_head rx_list; /* Pending GRO_NORMAL skbs */ int rx_count; /* length of rx_list */ - unsigned int napi_id; + unsigned int napi_id; /* protected by netdev_lock */ struct hrtimer timer; struct task_struct *thread; unsigned long gro_flush_timeout; @@ -570,16 +570,11 @@ static inline bool napi_complete(struct napi_struct *n) int dev_set_threaded(struct net_device *dev, bool threaded); -/** - * napi_disable - prevent NAPI from scheduling - * @n: NAPI context - * - * Stop NAPI from being scheduled on this context. - * Waits till any outstanding processing completes. - */ void napi_disable(struct napi_struct *n); +void napi_disable_locked(struct napi_struct *n); void napi_enable(struct napi_struct *n); +void napi_enable_locked(struct napi_struct *n); /** * napi_synchronize - wait until NAPI is not running |