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Daniel Borkmann 3998d18426 netkit: Fix pkt_type override upon netkit pass verdict 
When running Cilium connectivity test suite with netkit in L2 mode, we
found that compared to tcx a few tests were failing which pushed traffic
into an L7 proxy sitting in host namespace. The problem in particular is
around the invocation of eth_type_trans() in netkit.

In case of tcx, this is run before the tcx ingress is triggered inside
host namespace and thus if the BPF program uses the bpf_skb_change_type()
helper the newly set type is retained. However, in case of netkit, the
late eth_type_trans() invocation overrides the earlier decision from the
BPF program which eventually leads to the test failure.

Instead of eth_type_trans(), split out the relevant parts, meaning, reset
of mac header and call to eth_skb_pkt_type() before the BPF program is run
in order to have the same behavior as with tcx, and refactor a small helper
called eth_skb_pull_mac() which is run in case it's passed up the stack
where the mac header must be pulled. With this all connectivity tests pass.

Fixes: 35dfaad718 ("netkit, bpf: Add bpf programmable net device")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20240524163619.26001-2-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-05-25 10:48:57 -07:00
..
6lowpan net: fill in MODULE_DESCRIPTION()s for 6LoWPAN 2024-02-09 14:12:01 -08:00
9p netfs, 9p: Implement helpers for new write code 2024-05-01 18:07:37 +01:00
802 net: fill in MODULE_DESCRIPTION()s under net/802* 2023-10-28 11:29:28 +01:00
8021q net: annotate writes on dev->mtu from ndo_change_mtu() 2024-05-07 16:19:14 -07:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
atm inet: introduce dst_rtable() helper 2024-04-30 18:32:38 -07:00
ax25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-14 10:53:19 -07:00
batman-adv net: annotate writes on dev->mtu from ndo_change_mtu() 2024-05-07 16:19:14 -07:00
bluetooth Bluetooth: hci_core: Fix not handling hdev->le_num_of_adv_sets=1 2024-05-14 10:56:37 -04:00
bpf bpf: check bpf_dummy_struct_ops program params for test runs 2024-04-25 12:42:43 -07:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2024-05-15 07:30:49 -07:00
caif caif: Use UTILITY_NAME_LENGTH instead of hard-coding 16 2024-04-02 18:20:00 -07:00
can linux-can-next-for-6.9-20240220 2024-02-20 15:32:45 +01:00
ceph libceph: init the cursor when preparing sparse read in msgr2 2024-03-06 12:43:01 +01:00
core net: revert partially applied PHY topology series 2024-05-13 18:35:02 -07:00
dcb
dccp net: dccp: Fix ccid2_rtt_estimator() kernel-doc 2024-05-07 16:15:08 -07:00
devlink devlink: extend devlink_param *set pointer 2024-04-22 13:05:19 -07:00
dns_resolver Networking changes for 6.8. 2024-01-11 10:07:29 -08:00
dsa net: dsa: add support switches global DSCP priority mapping 2024-05-08 10:35:10 +01:00
ethernet netkit: Fix pkt_type override upon netkit pass verdict 2024-05-25 10:48:57 -07:00
ethtool net: revert partially applied PHY topology series 2024-05-13 18:35:02 -07:00
handshake net/handshake: remove redundant assignment to variable ret 2024-04-16 17:14:55 -07:00
hsr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
ieee802154 net: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:41 +01:00
ife net: sched: ife: fix potential use-after-free 2023-12-15 10:50:18 +00:00
ipv4 tcp: Fix shift-out-of-bounds in dctcp_update_alpha(). 2024-05-21 13:34:50 +02:00
ipv6 ipv6: sr: fix memleak in seg6_hmac_init_algo 2024-05-21 13:16:25 +02:00
iucv net/iucv: Avoid explicit cpumask var allocation on stack 2024-04-02 18:19:09 -07:00
kcm net: kcm: fix incorrect parameter validation in the kcm_getsockopt) function 2024-03-11 09:53:22 +00:00
key net: fill in MODULE_DESCRIPTION()s for af_key 2024-02-09 14:12:01 -08:00
l2tp l2tp: fix ICMP error handling for UDP-encap sockets 2024-05-17 12:15:22 -07:00
l3mdev
lapb
llc net: Remove ctl_table sentinel elements from several networking subsystems 2024-05-03 13:29:42 +01:00
mac80211 wifi: mac80211: handle color change per link 2024-05-03 10:18:19 +02:00
mac802154 mac802154: fix llsec key resources release in mac802154_llsec_key_del 2024-03-06 21:01:26 +01:00
mctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-02-29 14:24:56 -08:00
mpls net: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:41 +01:00
mptcp mptcp: include inet_common in mib.h 2024-05-13 18:29:23 -07:00
ncsi net/ncsi: Add NC-SI 1.2 Get MC MAC Address command 2023-11-18 15:00:51 +00:00
netfilter netfilter pull request 24-05-12 2024-05-13 13:12:35 -07:00
netlabel netlabel: fix RCU annotation for IPv4 options on socket creation 2024-05-13 14:58:12 -07:00
netlink netlink: support all extack types in dumps 2024-04-23 10:09:49 -07:00
netrom netrom: fix possible dead-lock in nr_rt_ioctl() 2024-05-16 19:35:44 -07:00
nfc nfc: nci: Fix uninit-value in nci_rx_work 2024-05-20 11:41:26 +01:00
nsh nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). 2024-04-26 12:20:01 +02:00
openvswitch openvswitch: Set the skbuff pkt_type for proper pmtud support. 2024-05-21 15:34:04 +02:00
packet af_packet: do not call packet_read_pending() from tpacket_destruct_skb() 2024-05-16 19:38:05 -07:00
phonet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
psample ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00
qrtr net: qrtr: ns: Fix module refcnt 2024-05-16 09:47:45 +01:00
rds net: rds: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
rfkill net: rfkill: gpio: Convert to platform remove callback returning void 2024-03-25 15:40:22 +01:00
rose net: Remove ctl_table sentinel elements from several networking subsystems 2024-05-03 13:29:42 +01:00
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
sched net/sched: adjust device watchdog timer to detect stopped queue at right time 2024-05-09 20:24:13 -07:00
sctp net: Remove ctl_table sentinel elements from several networking subsystems 2024-05-03 13:29:42 +01:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
strparser
sunrpc net: sunrpc: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:42 +01:00
switchdev net: bridge: switchdev: Improve error message for port_obj_add/del functions 2024-05-08 12:19:12 +01:00
tipc net: Remove ctl_table sentinel elements from several networking subsystems 2024-05-03 13:29:42 +01:00
tls Revert "net: mirror skb frag ref/unref helpers" 2024-05-03 16:05:53 -07:00
unix af_unix: Fix garbage collection of embryos carrying OOB with SCM_RIGHTS 2024-05-21 13:42:02 +02:00
vmw_vsock vsock/virtio: fix packet delivery to tap device 2024-04-02 18:00:24 -07:00
wireless Merge wireless into wireless-next 2024-05-06 16:32:51 +02:00
x25 ax.25: x.25: Remove the now superfluous sentinel elements from ctl_table array 2024-05-03 13:29:43 +01:00
xdp xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING 2024-04-05 22:47:22 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-05-09 10:01:01 -07:00
compat.c file: stop exposing receive_fd_user() 2023-12-12 14:24:14 +01:00
devres.c
Kconfig net: add IEEE 802.1q specific helpers 2024-05-08 10:35:09 +01:00
Kconfig.debug
Makefile af_unix: Remove CONFIG_UNIX_SCM. 2024-01-31 16:41:16 -08:00
socket.c io_uring: separate header for exported net bits 2024-04-15 08:10:26 -06:00
sysctl_net.c sysctl: treewide: constify argument ctl_table_root::permissions(table) 2024-04-24 09:43:54 +02:00