/* 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_ */-
Ilya Maximets authored
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: 965a9909 ("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>
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