diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-01-14 19:53:11 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-01-15 19:13:33 -0800 |
| commit | 2628f4958cd4a8be2f14b611c67ef9766c5ee564 (patch) | |
| tree | 004c79cd2cd2ffb9fc1d91f3f98b793ba4f31eb5 /net/core/dev.h | |
| parent | 5fda3f35349b6b7f22f5f5095a3821261d515075 (diff) | |
net: add helpers for lookup and walking netdevs under netdev_lock()
Add helpers for accessing netdevs under netdev_lock().
There's some careful handling needed to find the device and lock it
safely, without it getting unregistered, and without taking rtnl_lock
(the latter being the whole point of the new locking, after all).
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250115035319.559603-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core/dev.h')
| -rw-r--r-- | net/core/dev.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/net/core/dev.h b/net/core/dev.h index d8966847794c..25ae732c0775 100644 --- a/net/core/dev.h +++ b/net/core/dev.h @@ -2,6 +2,7 @@ #ifndef _NET_CORE_DEV_H #define _NET_CORE_DEV_H +#include <linux/cleanup.h> #include <linux/types.h> #include <linux/rwsem.h> #include <linux/netdevice.h> @@ -23,8 +24,23 @@ struct sd_flow_limit { extern int netdev_flow_limit_table_len; struct napi_struct *netdev_napi_by_id(struct net *net, unsigned int napi_id); +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_device * +netdev_xa_find_lock(struct net *net, struct net_device *dev, + unsigned long *index); + +DEFINE_FREE(netdev_unlock, struct net_device *, if (_T) netdev_unlock(_T)); + +#define for_each_netdev_lock_scoped(net, var_name, ifindex) \ + for (struct net_device *var_name __free(netdev_unlock) = NULL; \ + (var_name = netdev_xa_find_lock(net, var_name, &ifindex)); \ + ifindex++) + #ifdef CONFIG_PROC_FS int __init dev_proc_init(void); #else |