2017-11-01 15:09:13 +01:00
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2013-03-29 14:46:52 +01:00
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openvswitch: Add original direction conntrack tuple to sw_flow_key.
Add the fields of the conntrack original direction 5-tuple to struct
sw_flow_key. The new fields are initially marked as non-existent, and
are populated whenever a conntrack action is executed and either finds
or generates a conntrack entry. This means that these fields exist
for all packets that were not rejected by conntrack as untrackable.
The original tuple fields in the sw_flow_key are filled from the
original direction tuple of the conntrack entry relating to the
current packet, or from the original direction tuple of the master
conntrack entry, if the current conntrack entry has a master.
Generally, expected connections of connections having an assigned
helper (e.g., FTP), have a master conntrack entry.
The main purpose of the new conntrack original tuple fields is to
allow matching on them for policy decision purposes, with the premise
that the admissibility of tracked connections reply packets (as well
as original direction packets), and both direction packets of any
related connections may be based on ACL rules applying to the master
connection's original direction 5-tuple. This also makes it easier to
make policy decisions when the actual packet headers might have been
transformed by NAT, as the original direction 5-tuple represents the
packet headers before any such transformation.
When using the original direction 5-tuple the admissibility of return
and/or related packets need not be based on the mere existence of a
conntrack entry, allowing separation of admission policy from the
established conntrack state. While existence of a conntrack entry is
required for admission of the return or related packets, policy
changes can render connections that were initially admitted to be
rejected or dropped afterwards. If the admission of the return and
related packets was based on mere conntrack state (e.g., connection
being in an established state), a policy change that would make the
connection rejected or dropped would need to find and delete all
conntrack entries affected by such a change. When using the original
direction 5-tuple matching the affected conntrack entries can be
allowed to time out instead, as the established state of the
connection would not need to be the basis for packet admission any
more.
It should be noted that the directionality of related connections may
be the same or different than that of the master connection, and
neither the original direction 5-tuple nor the conntrack state bits
carry this information. If needed, the directionality of the master
connection can be stored in master's conntrack mark or labels, which
are automatically inherited by the expected related connections.
The fact that neither ARP nor ND packets are trackable by conntrack
allows mutual exclusion between ARP/ND and the new conntrack original
tuple fields. Hence, the IP addresses are overlaid in union with ARP
and ND fields. This allows the sw_flow_key to not grow much due to
this patch, but it also means that we must be careful to never use the
new key fields with ARP or ND packets. ARP is easy to distinguish and
keep mutually exclusive based on the ethernet type, but ND being an
ICMPv6 protocol requires a bit more attention.
Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Joe Stringer <joe@ovn.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-09 11:21:59 -08:00
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2013-03-29 14:46:52 +01:00
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2013-12-13 15:22:19 +01:00
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2013-03-29 14:46:52 +01:00
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2021-07-23 10:24:12 -04:00
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openvswitch: Introduce per-cpu upcall dispatch
The Open vSwitch kernel module uses the upcall mechanism to send
packets from kernel space to user space when it misses in the kernel
space flow table. The upcall sends packets via a Netlink socket.
Currently, a Netlink socket is created for every vport. In this way,
there is a 1:1 mapping between a vport and a Netlink socket.
When a packet is received by a vport, if it needs to be sent to
user space, it is sent via the corresponding Netlink socket.
This mechanism, with various iterations of the corresponding user
space code, has seen some limitations and issues:
* On systems with a large number of vports, there is a correspondingly
large number of Netlink sockets which can limit scaling.
(https://bugzilla.redhat.com/show_bug.cgi?id=1526306)
* Packet reordering on upcalls.
(https://bugzilla.redhat.com/show_bug.cgi?id=1844576)
* A thundering herd issue.
(https://bugzilla.redhat.com/show_bug.cgi?id=1834444)
This patch introduces an alternative, feature-negotiated, upcall
mode using a per-cpu dispatch rather than a per-vport dispatch.
In this mode, the Netlink socket to be used for the upcall is
selected based on the CPU of the thread that is executing the upcall.
In this way, it resolves the issues above as:
a) The number of Netlink sockets scales with the number of CPUs
rather than the number of vports.
b) Ordering per-flow is maintained as packets are distributed to
CPUs based on mechanisms such as RSS and flows are distributed
to a single user space thread.
c) Packets from a flow can only wake up one user space thread.
The corresponding user space code can be found at:
https://mail.openvswitch.org/pipermail/ovs-dev/2021-July/385139.html
Bugzilla: https://bugzilla.redhat.com/1844576
Signed-off-by: Mark Gray <mark.d.gray@redhat.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-15 08:27:54 -04:00
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2013-03-29 14:46:52 +01:00
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2013-10-22 10:42:46 -07:00
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2013-03-29 14:46:52 +01:00
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2013-10-22 10:42:46 -07:00
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2013-12-13 15:22:18 +01:00
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2016-04-26 10:06:15 +02:00
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2020-07-31 14:21:34 +02:00
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2021-07-23 10:24:13 -04:00
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openvswitch: Introduce per-cpu upcall dispatch
The Open vSwitch kernel module uses the upcall mechanism to send
packets from kernel space to user space when it misses in the kernel
space flow table. The upcall sends packets via a Netlink socket.
Currently, a Netlink socket is created for every vport. In this way,
there is a 1:1 mapping between a vport and a Netlink socket.
When a packet is received by a vport, if it needs to be sent to
user space, it is sent via the corresponding Netlink socket.
This mechanism, with various iterations of the corresponding user
space code, has seen some limitations and issues:
* On systems with a large number of vports, there is a correspondingly
large number of Netlink sockets which can limit scaling.
(https://bugzilla.redhat.com/show_bug.cgi?id=1526306)
* Packet reordering on upcalls.
(https://bugzilla.redhat.com/show_bug.cgi?id=1844576)
* A thundering herd issue.
(https://bugzilla.redhat.com/show_bug.cgi?id=1834444)
This patch introduces an alternative, feature-negotiated, upcall
mode using a per-cpu dispatch rather than a per-vport dispatch.
In this mode, the Netlink socket to be used for the upcall is
selected based on the CPU of the thread that is executing the upcall.
In this way, it resolves the issues above as:
a) The number of Netlink sockets scales with the number of CPUs
rather than the number of vports.
b) Ordering per-flow is maintained as packets are distributed to
CPUs based on mechanisms such as RSS and flows are distributed
to a single user space thread.
c) Packets from a flow can only wake up one user space thread.
The corresponding user space code can be found at:
https://mail.openvswitch.org/pipermail/ovs-dev/2021-July/385139.html
Bugzilla: https://bugzilla.redhat.com/1844576
Signed-off-by: Mark Gray <mark.d.gray@redhat.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-15 08:27:54 -04:00
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2013-03-29 14:46:52 +01:00
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2013-10-22 10:42:46 -07:00
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2020-07-31 14:20:56 +02:00
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2013-10-22 10:42:46 -07:00
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2013-03-29 14:46:52 +01:00
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2013-12-13 15:22:18 +01:00
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2014-07-17 15:14:13 -07:00
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net: openvswitch: Set OvS recirc_id from tc chain index
Offloaded OvS datapath rules are translated one to one to tc rules,
for example the following simplified OvS rule:
recirc_id(0),in_port(dev1),eth_type(0x0800),ct_state(-trk) actions:ct(),recirc(2)
Will be translated to the following tc rule:
$ tc filter add dev dev1 ingress \
prio 1 chain 0 proto ip \
flower tcp ct_state -trk \
action ct pipe \
action goto chain 2
Received packets will first travel though tc, and if they aren't stolen
by it, like in the above rule, they will continue to OvS datapath.
Since we already did some actions (action ct in this case) which might
modify the packets, and updated action stats, we would like to continue
the proccessing with the correct recirc_id in OvS (here recirc_id(2))
where we left off.
To support this, introduce a new skb extension for tc, which
will be used for translating tc chain to ovs recirc_id to
handle these miss cases. Last tc chain index will be set
by tc goto chain action and read by OvS datapath.
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-09-04 16:56:37 +03:00
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openvswitch: Introduce per-cpu upcall dispatch
The Open vSwitch kernel module uses the upcall mechanism to send
packets from kernel space to user space when it misses in the kernel
space flow table. The upcall sends packets via a Netlink socket.
Currently, a Netlink socket is created for every vport. In this way,
there is a 1:1 mapping between a vport and a Netlink socket.
When a packet is received by a vport, if it needs to be sent to
user space, it is sent via the corresponding Netlink socket.
This mechanism, with various iterations of the corresponding user
space code, has seen some limitations and issues:
* On systems with a large number of vports, there is a correspondingly
large number of Netlink sockets which can limit scaling.
(https://bugzilla.redhat.com/show_bug.cgi?id=1526306)
* Packet reordering on upcalls.
(https://bugzilla.redhat.com/show_bug.cgi?id=1844576)
* A thundering herd issue.
(https://bugzilla.redhat.com/show_bug.cgi?id=1834444)
This patch introduces an alternative, feature-negotiated, upcall
mode using a per-cpu dispatch rather than a per-vport dispatch.
In this mode, the Netlink socket to be used for the upcall is
selected based on the CPU of the thread that is executing the upcall.
In this way, it resolves the issues above as:
a) The number of Netlink sockets scales with the number of CPUs
rather than the number of vports.
b) Ordering per-flow is maintained as packets are distributed to
CPUs based on mechanisms such as RSS and flows are distributed
to a single user space thread.
c) Packets from a flow can only wake up one user space thread.
The corresponding user space code can be found at:
https://mail.openvswitch.org/pipermail/ovs-dev/2021-July/385139.html
Bugzilla: https://bugzilla.redhat.com/1844576
Signed-off-by: Mark Gray <mark.d.gray@redhat.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-15 08:27:54 -04:00
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2013-03-29 14:46:52 +01:00
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2015-05-26 20:59:43 -07:00
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2013-03-29 14:46:52 +01:00
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2014-11-06 06:51:24 -08:00
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2015-08-26 11:31:48 -07:00
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2016-06-20 07:26:17 -07:00
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2015-08-26 11:31:48 -07:00
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net: openvswitch: add hash info to upcall
When using the kernel datapath, the upcall don't
include skb hash info relatived. That will introduce
some problem, because the hash of skb is important
in kernel stack. For example, VXLAN module uses
it to select UDP src port. The tx queue selection
may also use the hash in stack.
Hash is computed in different ways. Hash is random
for a TCP socket, and hash may be computed in hardware,
or software stack. Recalculation hash is not easy.
Hash of TCP socket is computed:
tcp_v4_connect
-> sk_set_txhash (is random)
__tcp_transmit_skb
-> skb_set_hash_from_sk
There will be one upcall, without information of skb
hash, to ovs-vswitchd, for the first packet of a TCP
session. The rest packets will be processed in Open vSwitch
modules, hash kept. If this tcp session is forward to
VXLAN module, then the UDP src port of first tcp packet
is different from rest packets.
TCP packets may come from the host or dockers, to Open vSwitch.
To fix it, we store the hash info to upcall, and restore hash
when packets sent back.
+---------------+ +-------------------------+
| Docker/VMs | | ovs-vswitchd |
+----+----------+ +-+--------------------+--+
| ^ |
| | |
| | upcall v restore packet hash (not recalculate)
| +-+--------------------+--+
| tap netdev | | vxlan module
+---------------> +--> Open vSwitch ko +-->
or internal type | |
+-------------------------+
Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2019-October/364062.html
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-13 23:04:49 +08:00
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2013-03-29 14:46:52 +01:00
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2014-11-06 06:51:24 -08:00
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2015-01-14 13:56:19 +00:00
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2015-08-26 11:31:48 -07:00
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net: openvswitch: add hash info to upcall
When using the kernel datapath, the upcall don't
include skb hash info relatived. That will introduce
some problem, because the hash of skb is important
in kernel stack. For example, VXLAN module uses
it to select UDP src port. The tx queue selection
may also use the hash in stack.
Hash is computed in different ways. Hash is random
for a TCP socket, and hash may be computed in hardware,
or software stack. Recalculation hash is not easy.
Hash of TCP socket is computed:
tcp_v4_connect
-> sk_set_txhash (is random)
__tcp_transmit_skb
-> skb_set_hash_from_sk
There will be one upcall, without information of skb
hash, to ovs-vswitchd, for the first packet of a TCP
session. The rest packets will be processed in Open vSwitch
modules, hash kept. If this tcp session is forward to
VXLAN module, then the UDP src port of first tcp packet
is different from rest packets.
TCP packets may come from the host or dockers, to Open vSwitch.
To fix it, we store the hash info to upcall, and restore hash
when packets sent back.
+---------------+ +-------------------------+
| Docker/VMs | | ovs-vswitchd |
+----+----------+ +-+--------------------+--+
| ^ |
| | |
| | upcall v restore packet hash (not recalculate)
| +-+--------------------+--+
| tap netdev | | vxlan module
+---------------> +--> Open vSwitch ko +-->
or internal type | |
+-------------------------+
Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2019-October/364062.html
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-13 23:04:49 +08:00
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2013-03-29 14:46:52 +01:00
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2013-06-17 17:50:33 -07:00
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2013-08-19 11:23:34 -07:00
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2014-10-03 15:35:33 -07:00
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2013-03-29 14:46:52 +01:00
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2014-07-17 15:14:13 -07:00
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2013-03-29 14:46:52 +01:00
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2014-07-17 15:14:13 -07:00
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2013-03-29 14:46:52 +01:00
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2016-04-26 10:06:15 +02:00
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2017-11-02 17:04:37 -02:00
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2013-03-29 14:46:52 +01:00
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2015-01-15 03:53:59 +01:00
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2013-08-19 11:23:34 -07:00
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2015-01-15 03:53:59 +01:00
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2013-08-19 11:23:34 -07:00
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2013-03-29 14:46:52 +01:00
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2013-06-17 17:50:18 -07:00
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2013-08-22 12:30:48 -07:00
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2013-10-23 01:44:59 -07:00
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2014-09-15 19:37:25 -07:00
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2014-10-06 05:05:13 -07:00
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2015-10-06 11:00:00 -07:00
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2015-08-26 11:31:48 -07:00
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2015-08-26 11:31:49 -07:00
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2015-10-01 15:00:37 -07:00
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openvswitch: Add original direction conntrack tuple to sw_flow_key.
Add the fields of the conntrack original direction 5-tuple to struct
sw_flow_key. The new fields are initially marked as non-existent, and
are populated whenever a conntrack action is executed and either finds
or generates a conntrack entry. This means that these fields exist
for all packets that were not rejected by conntrack as untrackable.
The original tuple fields in the sw_flow_key are filled from the
original direction tuple of the conntrack entry relating to the
current packet, or from the original direction tuple of the master
conntrack entry, if the current conntrack entry has a master.
Generally, expected connections of connections having an assigned
helper (e.g., FTP), have a master conntrack entry.
The main purpose of the new conntrack original tuple fields is to
allow matching on them for policy decision purposes, with the premise
that the admissibility of tracked connections reply packets (as well
as original direction packets), and both direction packets of any
related connections may be based on ACL rules applying to the master
connection's original direction 5-tuple. This also makes it easier to
make policy decisions when the actual packet headers might have been
transformed by NAT, as the original direction 5-tuple represents the
packet headers before any such transformation.
When using the original direction 5-tuple the admissibility of return
and/or related packets need not be based on the mere existence of a
conntrack entry, allowing separation of admission policy from the
established conntrack state. While existence of a conntrack entry is
required for admission of the return or related packets, policy
changes can render connections that were initially admitted to be
rejected or dropped afterwards. If the admission of the return and
related packets was based on mere conntrack state (e.g., connection
being in an established state), a policy change that would make the
connection rejected or dropped would need to find and delete all
conntrack entries affected by such a change. When using the original
direction 5-tuple matching the affected conntrack entries can be
allowed to time out instead, as the established state of the
connection would not need to be the basis for packet admission any
more.
It should be noted that the directionality of related connections may
be the same or different than that of the master connection, and
neither the original direction 5-tuple nor the conntrack state bits
carry this information. If needed, the directionality of the master
connection can be stored in master's conntrack mark or labels, which
are automatically inherited by the expected related connections.
The fact that neither ARP nor ND packets are trackable by conntrack
allows mutual exclusion between ARP/ND and the new conntrack original
tuple fields. Hence, the IP addresses are overlaid in union with ARP
and ND fields. This allows the sw_flow_key to not grow much due to
this patch, but it also means that we must be careful to never use the
new key fields with ARP or ND packets. ARP is easy to distinguish and
keep mutually exclusive based on the ethernet type, but ND being an
ICMPv6 protocol requires a bit more attention.
Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Joe Stringer <joe@ovn.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-09 11:21:59 -08:00
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2017-11-07 21:07:02 +08:00
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2013-06-17 17:50:18 -07:00
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2022-03-09 23:20:33 +01:00
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2013-03-29 14:46:52 +01:00
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2013-06-17 17:50:18 -07:00
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2017-06-08 10:37:45 +02:00
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2013-06-17 17:50:18 -07:00
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2014-10-03 15:35:30 -07:00
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2014-10-03 15:35:33 -07:00
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2014-11-06 06:51:24 -08:00
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2015-01-15 03:53:59 +01:00
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2015-10-05 13:09:47 +02:00
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2016-04-22 17:31:18 +02:00
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2018-01-25 13:20:11 -08:00
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2019-03-28 12:43:23 +08:00
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2013-06-17 17:50:18 -07:00
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2013-03-29 14:46:52 +01:00
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2014-10-06 05:05:13 -07:00
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2013-03-29 14:46:52 +01:00
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2022-02-23 16:54:09 -08:00
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2013-03-29 14:46:52 +01:00
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2013-08-22 12:30:48 -07:00
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2013-03-29 14:46:52 +01:00
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2014-09-30 10:52:32 -07:00
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2013-03-29 14:46:52 +01:00
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2017-02-09 11:21:55 -08:00
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2015-10-01 15:00:37 -07:00
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2017-02-09 11:21:55 -08:00
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2015-08-26 11:31:52 -07:00
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2015-08-26 11:31:48 -07:00
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2015-10-06 11:00:00 -07:00
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2016-03-10 10:54:23 -08:00
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|
2015-08-26 11:31:48 -07:00
|
|
|
|
openvswitch: Add original direction conntrack tuple to sw_flow_key.
Add the fields of the conntrack original direction 5-tuple to struct
sw_flow_key. The new fields are initially marked as non-existent, and
are populated whenever a conntrack action is executed and either finds
or generates a conntrack entry. This means that these fields exist
for all packets that were not rejected by conntrack as untrackable.
The original tuple fields in the sw_flow_key are filled from the
original direction tuple of the conntrack entry relating to the
current packet, or from the original direction tuple of the master
conntrack entry, if the current conntrack entry has a master.
Generally, expected connections of connections having an assigned
helper (e.g., FTP), have a master conntrack entry.
The main purpose of the new conntrack original tuple fields is to
allow matching on them for policy decision purposes, with the premise
that the admissibility of tracked connections reply packets (as well
as original direction packets), and both direction packets of any
related connections may be based on ACL rules applying to the master
connection's original direction 5-tuple. This also makes it easier to
make policy decisions when the actual packet headers might have been
transformed by NAT, as the original direction 5-tuple represents the
packet headers before any such transformation.
When using the original direction 5-tuple the admissibility of return
and/or related packets need not be based on the mere existence of a
conntrack entry, allowing separation of admission policy from the
established conntrack state. While existence of a conntrack entry is
required for admission of the return or related packets, policy
changes can render connections that were initially admitted to be
rejected or dropped afterwards. If the admission of the return and
related packets was based on mere conntrack state (e.g., connection
being in an established state), a policy change that would make the
connection rejected or dropped would need to find and delete all
conntrack entries affected by such a change. When using the original
direction 5-tuple matching the affected conntrack entries can be
allowed to time out instead, as the established state of the
connection would not need to be the basis for packet admission any
more.
It should be noted that the directionality of related connections may
be the same or different than that of the master connection, and
neither the original direction 5-tuple nor the conntrack state bits
carry this information. If needed, the directionality of the master
connection can be stored in master's conntrack mark or labels, which
are automatically inherited by the expected related connections.
The fact that neither ARP nor ND packets are trackable by conntrack
allows mutual exclusion between ARP/ND and the new conntrack original
tuple fields. Hence, the IP addresses are overlaid in union with ARP
and ND fields. This allows the sw_flow_key to not grow much due to
this patch, but it also means that we must be careful to never use the
new key fields with ARP or ND packets. ARP is easy to distinguish and
keep mutually exclusive based on the ethernet type, but ND being an
ICMPv6 protocol requires a bit more attention.
Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Joe Stringer <joe@ovn.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-09 11:21:59 -08:00
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2017-11-07 21:07:02 +08:00
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2013-03-29 14:46:52 +01:00
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2014-05-05 09:59:40 -07:00
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2013-03-29 14:46:52 +01:00
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2013-08-07 20:01:00 -07:00
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2015-01-21 16:42:52 -08:00
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2013-03-29 14:46:52 +01:00
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2013-08-07 20:01:00 -07:00
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2014-11-06 07:03:05 -08:00
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2015-01-21 16:42:52 -08:00
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2016-04-25 10:25:17 +02:00
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2013-03-29 14:46:52 +01:00
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2015-01-21 16:42:52 -08:00
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2013-03-29 14:46:52 +01:00
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openvswitch: Optimize sample action for the clone use cases
With the introduction of open flow 'clone' action, the OVS user space
can now translate the 'clone' action into kernel datapath 'sample'
action, with 100% probability, to ensure that the clone semantics,
which is that the packet seen by the clone action is the same as the
packet seen by the action after clone, is faithfully carried out
in the datapath.
While the sample action in the datpath has the matching semantics,
its implementation is only optimized for its original use.
Specifically, there are two limitation: First, there is a 3 level of
nesting restriction, enforced at the flow downloading time. This
limit turns out to be too restrictive for the 'clone' use case.
Second, the implementation avoid recursive call only if the sample
action list has a single userspace action.
The main optimization implemented in this series removes the static
nesting limit check, instead, implement the run time recursion limit
check, and recursion avoidance similar to that of the 'recirc' action.
This optimization solve both #1 and #2 issues above.
One related optimization attempts to avoid copying flow key as
long as the actions enclosed does not change the flow key. The
detection is performed only once at the flow downloading time.
Another related optimization is to rewrite the action list
at flow downloading time in order to save the fast path from parsing
the sample action list in its original form repeatedly.
Signed-off-by: Andy Zhou <azhou@ovn.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-20 16:32:29 -07:00
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2013-03-29 14:46:52 +01:00
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|
openvswitch: Optimize sample action for the clone use cases
With the introduction of open flow 'clone' action, the OVS user space
can now translate the 'clone' action into kernel datapath 'sample'
action, with 100% probability, to ensure that the clone semantics,
which is that the packet seen by the clone action is the same as the
packet seen by the action after clone, is faithfully carried out
in the datapath.
While the sample action in the datpath has the matching semantics,
its implementation is only optimized for its original use.
Specifically, there are two limitation: First, there is a 3 level of
nesting restriction, enforced at the flow downloading time. This
limit turns out to be too restrictive for the 'clone' use case.
Second, the implementation avoid recursive call only if the sample
action list has a single userspace action.
The main optimization implemented in this series removes the static
nesting limit check, instead, implement the run time recursion limit
check, and recursion avoidance similar to that of the 'recirc' action.
This optimization solve both #1 and #2 issues above.
One related optimization attempts to avoid copying flow key as
long as the actions enclosed does not change the flow key. The
detection is performed only once at the flow downloading time.
Another related optimization is to rewrite the action list
at flow downloading time in order to save the fast path from parsing
the sample action list in its original form repeatedly.
Signed-off-by: Andy Zhou <azhou@ovn.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-20 16:32:29 -07:00
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2013-03-29 14:46:52 +01:00
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2014-11-06 06:51:24 -08:00
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2015-05-26 20:59:43 -07:00
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2013-03-29 14:46:52 +01:00
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2014-11-06 06:51:24 -08:00
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2015-05-26 20:59:43 -07:00
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2013-03-29 14:46:52 +01:00
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2016-06-10 11:49:33 -07:00
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2016-08-22 20:33:19 +02:00
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2016-06-10 11:49:33 -07:00
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2014-10-06 05:05:13 -07:00
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2019-12-21 08:50:46 +05:30
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2013-03-29 14:46:52 +01:00
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2016-09-07 12:56:57 -04:00
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2013-03-29 14:46:52 +01:00
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2016-09-07 12:56:57 -04:00
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2013-03-29 14:46:52 +01:00
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2014-09-15 19:37:25 -07:00
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2016-08-22 20:32:55 +02:00
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2014-09-15 19:37:25 -07:00
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2015-08-26 11:31:48 -07:00
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2015-10-06 11:00:01 -07:00
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2015-10-19 19:18:58 -07:00
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2015-08-26 11:31:48 -07:00
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2015-08-26 11:31:49 -07:00
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2015-12-14 14:29:58 +01:00
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2015-08-26 11:31:52 -07:00
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|
openvswitch: Allow attaching helpers to ct action
Add support for using conntrack helpers to assist protocol detection.
The new OVS_CT_ATTR_HELPER attribute of the CT action specifies a helper
to be used for this connection. If no helper is specified, then helpers
will be automatically applied as per the sysctl configuration of
net.netfilter.nf_conntrack_helper.
The helper may be specified as part of the conntrack action, eg:
ct(helper=ftp). Initial packets for related connections should be
committed to allow later packets for the flow to be considered
established.
Example ovs-ofctl flows allowing FTP connections from ports 1->2:
in_port=1,tcp,action=ct(helper=ftp,commit),2
in_port=2,tcp,ct_state=-trk,action=ct(recirc)
in_port=2,tcp,ct_state=+trk-new+est,action=1
in_port=2,tcp,ct_state=+trk+rel,action=1
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-26 11:31:53 -07:00
|
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|
2016-03-10 10:54:23 -08:00
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2017-02-09 11:22:00 -08:00
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|
2017-04-21 16:48:06 -07:00
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|
2019-03-26 11:31:14 -07:00
|
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|
2015-08-26 11:31:48 -07:00
|
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|
|
2015-10-06 11:00:01 -07:00
|
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2015-08-26 11:31:48 -07:00
|
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|
2015-08-26 11:31:49 -07:00
|
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|
2015-10-01 15:00:37 -07:00
|
|
|
|
openvswitch: Allow attaching helpers to ct action
Add support for using conntrack helpers to assist protocol detection.
The new OVS_CT_ATTR_HELPER attribute of the CT action specifies a helper
to be used for this connection. If no helper is specified, then helpers
will be automatically applied as per the sysctl configuration of
net.netfilter.nf_conntrack_helper.
The helper may be specified as part of the conntrack action, eg:
ct(helper=ftp). Initial packets for related connections should be
committed to allow later packets for the flow to be considered
established.
Example ovs-ofctl flows allowing FTP connections from ports 1->2:
in_port=1,tcp,action=ct(helper=ftp,commit),2
in_port=2,tcp,ct_state=-trk,action=ct(recirc)
in_port=2,tcp,ct_state=+trk-new+est,action=1
in_port=2,tcp,ct_state=+trk+rel,action=1
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-26 11:31:53 -07:00
|
|
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|
|
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|
|
2016-03-10 10:54:23 -08:00
|
|
|
|
2017-02-09 11:22:00 -08:00
|
|
|
|
2017-04-21 16:48:06 -07:00
|
|
|
|
2019-03-26 11:31:14 -07:00
|
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|
2015-08-26 11:31:48 -07:00
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|
2016-03-10 10:54:23 -08:00
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2016-11-10 16:28:23 +01:00
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2019-03-26 06:13:46 +05:30
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2013-03-29 14:46:52 +01:00
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2016-06-10 11:49:33 -07:00
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2013-03-29 14:46:52 +01:00
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2015-02-05 13:40:49 -08:00
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2016-09-07 12:56:57 -04:00
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2013-03-29 14:46:52 +01:00
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2014-10-06 05:05:13 -07:00
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2015-08-26 11:31:48 -07:00
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2016-11-10 16:28:23 +01:00
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2017-10-10 16:54:44 -04:00
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2017-11-07 21:07:02 +08:00
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2017-11-10 12:09:43 -08:00
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2018-07-02 08:18:03 -07:00
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2019-03-26 06:13:46 +05:30
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2019-12-21 08:50:46 +05:30
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2013-03-29 14:46:52 +01:00
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2015-02-05 13:40:49 -08:00
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2013-03-29 14:46:52 +01:00
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2014-09-15 19:37:25 -07:00
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2014-10-06 05:05:13 -07:00
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2015-02-05 13:40:49 -08:00
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2015-10-06 10:59:56 -07:00
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2016-06-10 11:49:33 -07:00
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2016-11-10 16:28:23 +01:00
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2017-10-10 16:54:44 -04:00
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2017-11-07 21:07:02 +08:00
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2017-11-10 12:09:43 -08:00
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2018-07-02 08:18:03 -07:00
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2019-03-26 06:13:46 +05:30
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2019-12-21 08:50:46 +05:30
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openvswitch: add TTL decrement action
New action to decrement TTL instead of setting it to a fixed value.
This action will decrement the TTL and, in case of expired TTL, drop it
or execute an action passed via a nested attribute.
The default TTL expired action is to drop the packet.
Supports both IPv4 and IPv6 via the ttl and hop_limit fields, respectively.
Tested with a corresponding change in the userspace:
# ovs-dpctl dump-flows
in_port(2),eth(),eth_type(0x0800), packets:0, bytes:0, used:never, actions:dec_ttl{ttl<=1 action:(drop)},1
in_port(1),eth(),eth_type(0x0800), packets:0, bytes:0, used:never, actions:dec_ttl{ttl<=1 action:(drop)},2
in_port(1),eth(),eth_type(0x0806), packets:0, bytes:0, used:never, actions:2
in_port(2),eth(),eth_type(0x0806), packets:0, bytes:0, used:never, actions:1
# ping -c1 192.168.0.2 -t 42
IP (tos 0x0, ttl 41, id 61647, offset 0, flags [DF], proto ICMP (1), length 84)
192.168.0.1 > 192.168.0.2: ICMP echo request, id 386, seq 1, length 64
# ping -c1 192.168.0.2 -t 120
IP (tos 0x0, ttl 119, id 62070, offset 0, flags [DF], proto ICMP (1), length 84)
192.168.0.1 > 192.168.0.2: ICMP echo request, id 388, seq 1, length 64
# ping -c1 192.168.0.2 -t 1
#
Co-developed-by: Bindiya Kurle <bindiyakurle@gmail.com>
Signed-off-by: Bindiya Kurle <bindiyakurle@gmail.com>
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-15 14:20:56 +01:00
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2014-10-06 05:05:13 -07:00
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2015-02-05 13:40:49 -08:00
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2013-03-29 14:46:52 +01:00
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2017-11-10 12:09:40 -08:00
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2018-05-24 17:56:42 -07:00
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openvswitch: add TTL decrement action
New action to decrement TTL instead of setting it to a fixed value.
This action will decrement the TTL and, in case of expired TTL, drop it
or execute an action passed via a nested attribute.
The default TTL expired action is to drop the packet.
Supports both IPv4 and IPv6 via the ttl and hop_limit fields, respectively.
Tested with a corresponding change in the userspace:
# ovs-dpctl dump-flows
in_port(2),eth(),eth_type(0x0800), packets:0, bytes:0, used:never, actions:dec_ttl{ttl<=1 action:(drop)},1
in_port(1),eth(),eth_type(0x0800), packets:0, bytes:0, used:never, actions:dec_ttl{ttl<=1 action:(drop)},2
in_port(1),eth(),eth_type(0x0806), packets:0, bytes:0, used:never, actions:2
in_port(2),eth(),eth_type(0x0806), packets:0, bytes:0, used:never, actions:1
# ping -c1 192.168.0.2 -t 42
IP (tos 0x0, ttl 41, id 61647, offset 0, flags [DF], proto ICMP (1), length 84)
192.168.0.1 > 192.168.0.2: ICMP echo request, id 386, seq 1, length 64
# ping -c1 192.168.0.2 -t 120
IP (tos 0x0, ttl 119, id 62070, offset 0, flags [DF], proto ICMP (1), length 84)
192.168.0.1 > 192.168.0.2: ICMP echo request, id 388, seq 1, length 64
# ping -c1 192.168.0.2 -t 1
#
Co-developed-by: Bindiya Kurle <bindiyakurle@gmail.com>
Signed-off-by: Bindiya Kurle <bindiyakurle@gmail.com>
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-15 14:20:56 +01:00
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2020-11-24 07:34:44 -05:00
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2013-03-29 14:46:52 +01:00
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