kernel/linux.git/include/net/netns/ipv4.h, branch v4.9.57Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v4.9.572016-08-09T21:57:39+00:00net: Remove fib_local variable2016-08-09T21:57:39+00:00David Aherndsa@cumulusnetworks.com2016-08-09T13:51:06+00:00urn:sha1:631fee7d70e8eabb642b4bcc58f08bbe880c91aa
After commit 0ddcf43d5d4a ("ipv4: FIB Local/MAIN table collapse")
fib_local is set but not used. Remove it.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: ipv4: Consider failed nexthops in multipath routes2016-04-11T19:16:13+00:00David Aherndsa@cumulusnetworks.com2016-04-07T14:21:00+00:00urn:sha1:a6db4494d218c2e559173661ee972e048dc04fdd
Multipath route lookups should consider knowledge about next hops and not
select a hop that is known to be failed.
Example:
[h2] [h3] 15.0.0.5
| |
3| 3|
[SP1] [SP2]--+
1 2 1 2
| | /-------------+ |
| \ / |
| X |
| / \ |
| / \---------------\ |
1 2 1 2
12.0.0.2 [TOR1] 3-----------------3 [TOR2] 12.0.0.3
4 4
\ /
\ /
\ /
-------| |-----/
1 2
[TOR3]
3|
|
[h1] 12.0.0.1
host h1 with IP 12.0.0.1 has 2 paths to host h3 at 15.0.0.5:
root@h1:~# ip ro ls
...
12.0.0.0/24 dev swp1 proto kernel scope link src 12.0.0.1
15.0.0.0/16
nexthop via 12.0.0.2 dev swp1 weight 1
nexthop via 12.0.0.3 dev swp1 weight 1
...
If the link between tor3 and tor1 is down and the link between tor1
and tor2 then tor1 is effectively cut-off from h1. Yet the route lookups
in h1 are alternating between the 2 routes: ping 15.0.0.5 gets one and
ssh 15.0.0.5 gets the other. Connections that attempt to use the
12.0.0.2 nexthop fail since that neighbor is not reachable:
root@h1:~# ip neigh show
...
12.0.0.3 dev swp1 lladdr 00:02:00:00:00:1b REACHABLE
12.0.0.2 dev swp1 FAILED
...
The failed path can be avoided by considering known neighbor information
when selecting next hops. If the neighbor lookup fails we have no
knowledge about the nexthop, so give it a shot. If there is an entry
then only select the nexthop if the state is sane. This is similar to
what fib_detect_death does.
To maintain backward compatibility use of the neighbor information is
based on a new sysctl, fib_multipath_use_neigh.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: namespacify ip_early_demux sysctl knob2016-02-17T01:42:54+00:00Nikolay Borisovkernel@kyup.com2016-02-15T10:11:30+00:00urn:sha1:e21145a9871aa5ae07e01926105bb8e523d64095
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: Namespacify ip_dynaddr sysctl knob2016-02-17T01:42:54+00:00Nikolay Borisovkernel@kyup.com2016-02-15T10:11:29+00:00urn:sha1:287b7f38fd6842e534db1783cead3843f7677b79
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: Namespaceify ip_default_ttl sysctl knob2016-02-17T01:42:54+00:00Nikolay Borisovkernel@kyup.com2016-02-15T10:11:27+00:00urn:sha1:fa50d974d104113630d68b7d03233a6686230d0c
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
igmp: Namespacify igmp_qrv sysctl knob2016-02-11T14:59:22+00:00Nikolay Borisovkernel@kyup.com2016-02-08T21:29:24+00:00urn:sha1:165094afcee79e4d5b6e94032a5d3be157460b4a
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
igmp: Namespaceify igmp_llm_reports sysctl knob2016-02-11T14:59:22+00:00Nikolay Borisovn.borisov@siteground.com2016-02-08T22:13:50+00:00urn:sha1:87a8a2ae65b7721893c7922f963502be8fa01c94
This was initially introduced in df2cf4a78e488d26 ("IGMP: Inhibit
reports for local multicast groups") by defining the sysctl in the
ipv4_net_table array, however it was never implemented to be
namespace aware. Fix this by changing the code accordingly.
Signed-off-by: David S. Miller <davem@davemloft.net>
igmp: Namespaceify igmp_max_msf sysctl knob2016-02-11T14:59:22+00:00Nikolay Borisovkernel@kyup.com2016-02-08T21:29:22+00:00urn:sha1:166b6b2d6f01be67a83b87ab5c91350a68b17115
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
igmp: Namespaceify igmp_max_memberships sysctl knob2016-02-11T14:59:22+00:00Nikolay Borisovkernel@kyup.com2016-02-08T21:29:21+00:00urn:sha1:815c52700746cdcc0874a33390bac334a4b90107
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: Namespaceify tcp_notsent_lowat sysctl knob2016-02-07T19:36:11+00:00Nikolay Borisovkernel@kyup.com2016-02-03T07:46:57+00:00urn:sha1:4979f2d9f7262b9b180bc83de8d70f7a7721c085
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>