vxlan: convert configuration to RCU protection

Move 'struct vxlan_config' from an embedded structure inside
'struct vxlan_dev' to a dynamically allocated RCU-protected pointer
'vxlan->cfg'.

Updating configuration via vxlan_changelink() or vxlan_dev_configure()
allocates a new struct vxlan_config and publishes it with
rcu_assign_pointer(), freeing the previous config with kfree_rcu().

Readers are converted to use rcu_dereference() or rtnl_dereference().
In vxlan_xmit(), acquire rcu_read_lock() to protect config access.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260922181102.3989489-7-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions