Ilya Maximets 455302d1c9 xdp: fix hang while unregistering device bound to xdp socket ... 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>		2019-07-03 15:10:55 +02:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
xdp_umem.c	xdp: fix hang while unregistering device bound to xdp socket	2019-07-03 15:10:55 +02:00
xdp_umem.h	xdp: fix hang while unregistering device bound to xdp socket	2019-07-03 15:10:55 +02:00
xsk_diag.c	xsk: fix potential crash in xsk_diag_put_umem()	2019-03-07 10:36:37 +01:00
xsk_queue.c	net: xsk: add a simple buffer reuse queue	2018-09-25 13:13:15 -07:00
xsk_queue.h	xsk: Properly terminate assignment in xskq_produce_flush_desc	2019-06-26 14:39:05 +02:00
xsk.c	xdp: fix hang while unregistering device bound to xdp socket	2019-07-03 15:10:55 +02:00
xsk.h	xsk: add sock_diag interface for AF_XDP	2019-01-25 01:50:03 +01:00