Shaohua Li 513674b5a2 net: reevalulate autoflowlabel setting after sysctl setting ... sysctl.ip6.auto_flowlabels is default 1. In our hosts, we set it to 2. If sockopt doesn't set autoflowlabel, outcome packets from the hosts are supposed to not include flowlabel. This is true for normal packet, but not for reset packet. The reason is ipv6_pinfo.autoflowlabel is set in sock creation. Later if we change sysctl.ip6.auto_flowlabels, the ipv6_pinfo.autoflowlabel isn't changed, so the sock will keep the old behavior in terms of auto flowlabel. Reset packet is suffering from this problem, because reset packet is sent from a special control socket, which is created at boot time. Since sysctl.ipv6.auto_flowlabels is 1 by default, the control socket will always have its ipv6_pinfo.autoflowlabel set, even after user set sysctl.ipv6.auto_flowlabels to 1, so reset packset will always have flowlabel. Normal sock created before sysctl setting suffers from the same issue. We can't even turn off autoflowlabel unless we kill all socks in the hosts. To fix this, if IPV6_AUTOFLOWLABEL sockopt is used, we use the autoflowlabel setting from user, otherwise we always call ip6_default_np_autolabel() which has the new settings of sysctl. Note, this changes behavior a little bit. Before commit 42240901f7 (ipv6: Implement different admin modes for automatic flow labels), the autoflowlabel behavior of a sock isn't sticky, eg, if sysctl changes, existing connection will change autoflowlabel behavior. After that commit, autoflowlabel behavior is sticky in the whole life of the sock. With this patch, the behavior isn't sticky again. Cc: Martin KaFai Lau <kafai@fb.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Tom Herbert <tom@quantonium.net> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-12-21 13:07:20 -05:00
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6lowpan
9p
802
8021q
appletalk
atm
ax25
batman-adv
bluetooth
bpf
bridge	net: bridge: fix early call to br_stp_change_bridge_id and plug newlink leaks	2017-12-18 13:29:01 -05:00
caif
can
ceph
core	net: Fix double free and memory corruption in get_net_ns_by_id()	2017-12-20 12:42:22 -05:00
dcb
dccp
decnet
dns_resolver
dsa
ethernet
hsr
ieee802154
ife
ipv4	ipv4: Fix use-after-free when flushing FIB tables	2017-12-20 15:12:39 -05:00
ipv6	net: reevalulate autoflowlabel setting after sysctl setting	2017-12-21 13:07:20 -05:00
ipx
iucv
kcm
key
l2tp
l3mdev
lapb
llc
mac80211
mac802154
mpls
ncsi
netfilter
netlabel
netlink
netrom
nfc
nsh
openvswitch	openvswitch: Fix pop_vlan action for double tagged frames	2017-12-21 13:02:08 -05:00
packet
phonet
psample
qrtr
rds
rfkill
rose
rxrpc
sched	cls_bpf: fix offload assumptions after callback conversion	2017-12-20 13:08:18 -05:00
sctp	sctp: add SCTP_CID_RECONF conversion in sctp_cname	2017-12-18 13:21:46 -05:00
smc
strparser
sunrpc
switchdev
tipc	tipc: remove joining group member from congested list	2017-12-20 14:56:48 -05:00
tls
unix
vmw_vsock
wimax
wireless	cfg80211: ship certificates as hex files	2017-12-19 09:28:01 +01:00
x25
xfrm
compat.c
Kconfig
Makefile
socket.c
sysctl_net.c