mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
455302d1c9
Device that bound to XDP socket will not have zero refcount until the
userspace application will not close it. This leads to hang inside
'netdev_wait_allrefs()' if device unregistering requested:
# ip link del p1
< hang on recvmsg on netlink socket >
# ps -x | grep ip
5126 pts/0 D+ 0:00 ip link del p1
# journalctl -b
Jun 05 07:19:16 kernel:
unregister_netdevice: waiting for p1 to become free. Usage count = 1
Jun 05 07:19:27 kernel:
unregister_netdevice: waiting for p1 to become free. Usage count = 1
...
Fix that by implementing NETDEV_UNREGISTER event notification handler
to properly clean up all the resources and unref device.
This should also allow socket killing via ss(8) utility.
Fixes: 965a990984 ("xsk: add support for bind for Rx")
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
22 lines
687 B
C
22 lines
687 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* XDP user-space packet buffer
|
|
* Copyright(c) 2018 Intel Corporation.
|
|
*/
|
|
|
|
#ifndef XDP_UMEM_H_
|
|
#define XDP_UMEM_H_
|
|
|
|
#include <net/xdp_sock.h>
|
|
|
|
int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev,
|
|
u16 queue_id, u16 flags);
|
|
void xdp_umem_clear_dev(struct xdp_umem *umem);
|
|
bool xdp_umem_validate_queues(struct xdp_umem *umem);
|
|
void xdp_get_umem(struct xdp_umem *umem);
|
|
void xdp_put_umem(struct xdp_umem *umem);
|
|
void xdp_add_sk_umem(struct xdp_umem *umem, struct xdp_sock *xs);
|
|
void xdp_del_sk_umem(struct xdp_umem *umem, struct xdp_sock *xs);
|
|
struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr);
|
|
|
|
#endif /* XDP_UMEM_H_ */
|