Hangbin Liu e9919a24d3 fib_rules: return 0 directly if an exactly same rule exists when NLM_F_EXCL not supplied ...

With commit 153380ec4b ("fib_rules: Added NLM_F_EXCL support to
fib_nl_newrule") we now able to check if a rule already exists. But this
only works with iproute2. For other tools like libnl, NetworkManager,
it still could add duplicate rules with only NLM_F_CREATE flag, like

[localhost ~ ]# ip rule
0:      from all lookup local
32766:  from all lookup main
32767:  from all lookup default
100000: from 192.168.7.5 lookup 5
100000: from 192.168.7.5 lookup 5

As it doesn't make sense to create two duplicate rules, let's just return
0 if the rule exists.

Fixes: 153380ec4b ("fib_rules: Added NLM_F_EXCL support to fib_nl_newrule")
Reported-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2019-05-08 09:32:10 -07:00

..

bpf_sk_storage.c

bpf: Use PTR_ERR_OR_ZERO in bpf_fd_sk_storage_update_elem()

2019-05-04 23:20:58 -07:00

datagram.c

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datagram.h

…

dev_addr_lists.c

…

dev_ioctl.c

…

dev.c

net: use indirect calls helpers for ptype hook

2019-05-05 10:38:04 -07:00

devlink.c

devlink: Change devlink health locking mechanism

2019-05-01 11:07:03 -04:00

drop_monitor.c

genetlink: optionally validate strictly/dumps

2019-04-27 17:07:22 -04:00

dst_cache.c

…

dst.c

…

ethtool.c

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failover.c

failover: allow name change on IFF_UP slave interfaces

2019-04-10 22:12:26 -07:00

fib_notifier.c

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fib_rules.c

fib_rules: return 0 directly if an exactly same rule exists when NLM_F_EXCL not supplied

2019-05-08 09:32:10 -07:00

filter.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2019-04-28 08:42:41 -04:00

flow_dissector.c

bpf: support BPF_PROG_QUERY for BPF_FLOW_DISSECTOR attach_type

2019-04-25 23:49:06 +02:00

flow_offload.c

…

gen_estimator.c

…

gen_stats.c

Revert: "net: sched: put back q.qlen into a single location"

2019-04-10 12:20:46 -07:00

gro_cells.c

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hwbm.c

…

link_watch.c

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lwt_bpf.c

netlink: make validation more configurable for future strictness

2019-04-27 17:07:21 -04:00

lwtunnel.c

netlink: make nla_nest_start() add NLA_F_NESTED flag

2019-04-27 17:03:44 -04:00

Makefile

bpf: Introduce bpf sk local storage

2019-04-27 09:07:04 -07:00

neighbour.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2019-05-07 17:22:09 -07:00

net_namespace.c

netlink: make validation more configurable for future strictness

2019-04-27 17:07:21 -04:00

net-procfs.c

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net-sysfs.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2019-05-07 22:03:58 -07:00

net-sysfs.h

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net-traces.c

…

netclassid_cgroup.c

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netevent.c

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netpoll.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2019-05-07 22:03:58 -07:00

netprio_cgroup.c

cgroup: net: remove left over MODULE_LICENSE tag

2019-04-22 21:50:54 -07:00

page_pool.c

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pktgen.c

…

ptp_classifier.c

net/core: work around section mismatch warning for ptp_classifier

2019-04-16 20:46:17 -07:00

request_sock.c

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rtnetlink.c

netlink: make validation more configurable for future strictness

2019-04-27 17:07:21 -04:00

scm.c

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secure_seq.c

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skbuff.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2019-04-22 21:35:55 -07:00

skmsg.c

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sock_diag.c

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sock_map.c

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sock_reuseport.c

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sock.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2019-04-28 08:42:41 -04:00

stream.c

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sysctl_net_core.c

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timestamping.c

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tso.c

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utils.c

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xdp.c

…