Willem de Bruijn fd3a886258 net: in virtio_net_hdr only add VLAN_HLEN to csum_start if payload holds vlan ... Tun, tap, virtio, packet and uml vector all use struct virtio_net_hdr to communicate packet metadata to userspace. For skbuffs with vlan, the first two return the packet as it may have existed on the wire, inserting the VLAN tag in the user buffer. Then virtio_net_hdr.csum_start needs to be adjusted by VLAN_HLEN bytes. Commit f09e2249c4 ("macvtap: restore vlan header on user read") added this feature to macvtap. Commit 3ce9b20f19 ("macvtap: Fix csum_start when VLAN tags are present") then fixed up csum_start. Virtio, packet and uml do not insert the vlan header in the user buffer. When introducing virtio_net_hdr_from_skb to deduplicate filling in the virtio_net_hdr, the variant from macvtap which adds VLAN_HLEN was applied uniformly, breaking csum offset for packets with vlan on virtio and packet. Make insertion of VLAN_HLEN optional. Convert the callers to pass it when needed. Fixes: e858fae2b0 ("virtio_net: use common code for virtio_net_hdr and skb GSO conversion") Fixes: 1276f24eee ("packet: use common code for virtio_net_hdr and skb GSO conversion") Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-06-07 16:15:38 -04:00
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configs	um: defconfig: Cleanup from old Kconfig options	2017-09-13 22:32:51 +02:00
drivers	net: in virtio_net_hdr only add VLAN_HLEN to csum_start if payload holds vlan	2018-06-07 16:15:38 -04:00
include	time: Add an asm-generic/compat.h file	2018-04-19 13:28:51 +02:00
kernel	signal/um: More carefully relay signals in relay_signal.	2018-04-28 08:46:49 -05:00
os-Linux	um: Compile with modern headers	2018-03-29 22:15:12 +02:00
scripts	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
.gitignore	um: tell git to ignore generated files	2010-03-06 11:26:28 -08:00
Kconfig.char	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.common	kconfig: reference environment variables directly and remove 'option env='	2018-05-29 03:28:58 +09:00
Kconfig.debug	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.net	High Performance UML Vector Network Driver	2018-02-19 19:38:51 +01:00
Kconfig.rest	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.um	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	um: make sure to have generated headers for target	2017-11-27 16:19:51 -05:00
Makefile-os-Linux	x86, um: get rid of arch/um/os symlink	2008-10-22 22:55:22 -07:00
Makefile-skas	…