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Jesper Dangaard Brouer 5f7d57280c bpf: Drop MTU check when doing TC-BPF redirect to ingress 
The use-case for dropping the MTU check when TC-BPF does redirect to
ingress, is described by Eyal Birger in email[0]. The summary is the
ability to increase packet size (e.g. with IPv6 headers for NAT64) and
ingress redirect packet and let normal netstack fragment packet as needed.

[0] https://lore.kernel.org/netdev/CAHsH6Gug-hsLGHQ6N0wtixdOa85LDZ3HNRHVd0opR=19Qo4W4Q@mail.gmail.com/

V15:
 - missing static for function declaration

V9:
 - Make net_device "up" (IFF_UP) check explicit in skb_do_redirect

V4:
 - Keep net_device "up" (IFF_UP) check.
 - Adjustment to handle bpf_redirect_peer() helper

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/161287790971.790810.11785274340154740591.stgit@firesoul
2021-02-13 01:15:28 +01:00
..
6lowpan
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9p
Merge tag '9p-for-5.11-rc1' of git://github.com/martinetd/linux
2020-12-21 10:28:02 -08:00
802
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8021q
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-14 18:34:50 -08:00
appletalk
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atm
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ax25
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batman-adv
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bluetooth
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bpf
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-20 12:16:11 -08:00
bpfilter
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bridge
net: bridge: check vlan with eth_type_vlan() method
2021-01-18 14:27:33 -08:00
caif
…
can
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-14 18:34:50 -08:00
ceph
libceph: align session_key and con_secret to 16 bytes
2020-12-28 20:34:33 +01:00
core
bpf: Drop MTU check when doing TC-BPF redirect to ingress
2021-02-13 01:15:28 +01:00
dcb
net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands
2021-01-12 15:55:21 -08:00
dccp
Merge tag 'selinux-pr-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
2020-12-16 11:01:04 -08:00
decnet
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dns_resolver
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dsa
net: dsa: add ops for devlink-sb
2021-01-15 20:02:34 -08:00
ethernet
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ethtool
ethtool: fix error paths in ethnl_set_channels()
2020-12-16 13:27:17 -08:00
hsr
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ieee802154
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ife
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ipv4
bpf: Allow rewriting to ports under ip_unprivileged_port_start
2021-01-27 18:18:15 -08:00
ipv6
bpf: Allow rewriting to ports under ip_unprivileged_port_start
2021-01-27 18:18:15 -08:00
iucv
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kcm
net: group skb_shinfo zerocopy related bits together.
2021-01-07 16:08:37 -08:00
key
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l2tp
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l3mdev
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lapb
net: lapb: Decrease the refcount of "struct lapb_cb" in lapb_device_event
2021-01-04 13:42:41 -08:00
llc
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mac80211
mac80211: check if atf has been disabled in __ieee80211_schedule_txq
2021-01-14 22:27:38 +01:00
mac802154
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mpls
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mptcp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-14 18:34:50 -08:00
ncsi
net/ncsi: Use real net-device for response handler
2020-12-23 12:22:23 -08:00
netfilter
netfilter: nf_nat: Fix memleak in nf_nat_init
2021-01-11 00:34:11 +01:00
netlabel
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netlink
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netrom
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nfc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-20 12:16:11 -08:00
nsh
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openvswitch
net: openvswitch: add log message for error case
2021-01-14 16:32:14 -08:00
packet
net: af_packet: fix procfs header for 64-bit pointers
2020-12-18 12:17:23 -08:00
phonet
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psample
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qrtr
net: qrtr: fix null-ptr-deref in qrtr_ns_remove
2021-01-05 16:50:09 -08:00
rds
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rfkill
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rose
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rxrpc
rxrpc: Call state should be read with READ_ONCE() under some circumstances
2021-01-13 10:38:20 -08:00
sched
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-20 12:16:11 -08:00
sctp
sctp: remove the NETIF_F_SG flag before calling skb_segment
2021-01-16 19:05:59 -08:00
smc
net/smc: use memcpy instead of snprintf to avoid out of bounds read
2021-01-12 20:22:01 -08:00
strparser
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sunrpc
Merge tag 'nfsd-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
2021-01-19 13:01:50 -08:00
switchdev
net: switchdev: remove the transaction structure from port attributes
2021-01-11 16:00:57 -08:00
tipc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-01-14 18:34:50 -08:00
tls
net/tls: Except bond interface from some TLS checks
2021-01-18 20:48:40 -08:00
unix
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vmw_vsock
af_vsock: Assign the vsock transport considering the vsock address flags
2020-12-14 19:33:39 -08:00
wireless
cfg80211: Save the regulatory domain with a lock
2021-01-08 21:03:27 +01:00
x25
net: x25: Remove unimplemented X.25-over-LLC code stubs
2020-12-12 17:15:33 -08:00
xdp
xsk: Fold xp_assign_dev and __xp_assign_dev
2021-01-25 23:56:33 +01:00
xfrm
Merge tag 'selinux-pr-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
2020-12-16 11:01:04 -08:00
compat.c
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devres.c
…
Kconfig
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Makefile
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socket.c
bpf: Remove extra lock_sock for TCP_ZEROCOPY_RECEIVE
2021-01-20 14:23:00 -08:00
sysctl_net.c
…