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Ido Schimmel 885a3b1579 ipv4: nexthop: Correctly update nexthop group when replacing a nexthop 
Each nexthop group contains an indication if it has IPv4 nexthops
('has_v4'). Its purpose is to prevent IPv6 routes from using groups with
IPv4 nexthops.

However, the indication is not updated when a nexthop is replaced. This
results in the kernel wrongly rejecting IPv6 routes from pointing to
groups that only contain IPv6 nexthops. Example:

# ip nexthop replace id 1 via 192.0.2.2 dev dummy10
# ip nexthop replace id 10 group 1
# ip nexthop replace id 1 via 2001:db8:1::2 dev dummy10
# ip route replace 2001:db8:10::/64 nhid 10
Error: IPv6 routes can not use an IPv4 nexthop.

Solve this by iterating over all the nexthop groups that the replaced
nexthop is a member of and potentially update their IPv4 indication
according to the new set of member nexthops.

Avoid wasting cycles by only performing the update in case an IPv4
nexthop is replaced by an IPv6 nexthop.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-26 16:00:51 -07:00
..
6lowpan treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
9p 9p pull request for inclusion in 5.9 2020-08-15 08:34:36 -07:00
802
8021q net: get rid of lockdep_set_class_and_subclass() 2020-06-28 21:37:23 -07:00
appletalk appletalk: Fix atalk_proc_init() return path 2020-08-03 15:48:32 -07:00
atm mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
ax25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-07-25 17:49:04 -07:00
batman-adv batman-adv: Migrate to linux/prandom.h 2020-08-18 19:39:54 +02:00
bluetooth mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
bpf bpf: Allow to specify ifindex for skb in bpf_prog_test_run_skb 2020-08-03 23:32:23 +02:00
bpfilter Merge branch 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2020-08-04 14:27:25 -07:00
bridge netlink: consistently use NLA_POLICY_EXACT_LEN() 2020-08-18 12:28:45 -07:00
caif net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
can can: j1939: add rxtimer for multipacket broadcast session 2020-08-15 11:12:58 +02:00
ceph libceph: replace HTTP links with HTTPS ones 2020-08-03 11:05:26 +02:00
core devlink: Protect devlink port list traversal 2020-08-24 16:02:47 -07:00
dcb dcb_doit: remove redundant skb check 2020-06-23 20:27:09 -07:00
dccp net: dccp: delete repeated words 2020-08-24 17:31:20 -07:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2020-08-03 16:03:18 -07:00
dns_resolver docs: networking: convert dns_resolver.txt to ReST 2020-04-28 14:39:46 -07:00
dsa net: dsa: stop overriding master's ndo_get_phys_port_name 2020-07-23 15:14:58 -07:00
ethernet net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
ethtool Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-23 11:48:27 -07:00
hsr hsr: Use %pM format specifier for MAC addresses 2020-07-31 16:46:26 -07:00
ieee802154 net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
ife
ipv4 ipv4: nexthop: Correctly update nexthop group when replacing a nexthop 2020-08-26 16:00:51 -07:00
ipv6 ipv6: fib6: Avoid comma separated statements 2020-08-25 07:54:19 -07:00
iucv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-08-05 20:13:21 -07:00
kcm net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
l2tp l2tp: remove tunnel and session debug flags field 2020-08-22 12:44:37 -07:00
l3mdev l3mdev: add infrastructure for table to VRF mapping 2020-06-20 17:22:22 -07:00
lapb treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
llc net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
mac80211 mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
mac802154 mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
mpls net: Removed the device type check to add mpls support for devices 2020-07-27 11:40:47 -07:00
mptcp netlink: consistently use NLA_POLICY_EXACT_LEN() 2020-08-18 12:28:45 -07:00
ncsi net/ncsi: use eth_zero_addr() to clear mac address 2020-07-23 11:49:41 -07:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2020-08-16 16:05:36 -07:00
netlabel net: netlabel: kerneldoc fixes 2020-07-13 17:20:40 -07:00
netlink net: netlink: delete repeated words 2020-08-24 17:31:20 -07:00
netrom net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
nfc net/nfc/rawsock.c: add CAP_NET_RAW check. 2020-08-11 10:34:30 -07:00
nsh treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
openvswitch net: openvswitch: introduce common code for flushing flows 2020-08-13 15:53:30 -07:00
packet af_packet: TPACKET_V3: fix fill status rwlock imbalance 2020-08-13 15:37:30 -07:00
phonet net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
psample net: psample: fix build error when CONFIG_INET is not enabled 2020-05-23 16:36:05 -07:00
qrtr net: qrtr: fix usage of idr in port assignment to socket 2020-08-17 15:00:41 -07:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
rfkill
rose net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
sched Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-23 11:48:27 -07:00
sctp net: sctp: ulpqueue.c: delete duplicated word 2020-08-24 16:21:43 -07:00
smc net/smc: Prevent kernel-infoleak in __smc_diag_dump() 2020-08-20 12:07:31 -07:00
strparser
sunrpc sunrpc: Avoid comma separated statements 2020-08-25 07:54:19 -07:00
switchdev net: switchdev: kerneldoc fixes 2020-07-13 17:20:40 -07:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-23 11:48:27 -07:00
tls net/tls: Fix kmap usage 2020-08-11 10:20:34 -07:00
unix net: make ->{get,set}sockopt in proto_ops optional 2020-07-19 18:16:41 -07:00
vmw_vsock vsock: fix potential null pointer dereference in vsock_poll() 2020-08-12 12:56:06 -07:00
wimax
wireless netlink: consistently use NLA_POLICY_MIN_LEN() 2020-08-18 12:28:45 -07:00
x25 net: pass a sockptr_t into ->setsockopt 2020-07-24 15:41:54 -07:00
xdp xdp: Prevent kernel-infoleak in xsk_getsockopt() 2020-07-28 12:50:15 +02:00
xfrm A set of locking fixes and updates: 2020-08-10 19:07:44 -07:00
compat.c net/scm: Fix typo in SCM_RIGHTS compat refactoring 2020-08-07 12:43:25 -07:00
devres.c net: devres: rename the release callback of devm_register_netdev() 2020-06-30 15:57:34 -07:00
Kconfig net: ethtool: Remove PHYLIB direct dependency 2020-07-07 15:41:05 -07:00
Makefile net: move devres helpers into a separate source file 2020-05-23 16:56:17 -07:00
socket.c io_uring: allow tcp ancillary data for __sys_recvmsg_sock() 2020-08-24 16:16:06 -07:00
sysctl_net.c