linux-toradex.git/net/ipv4/gre_demux.c, branch v4.4.120 Linux kernel for Apalis and Colibri modules gre: Remove support for sharing GRE protocol hook. 2015-08-10T21:03:54+00:00 Pravin B Shelar pshelar@nicira.com 2015-08-08T06:51:52+00:00 9f57c67c379d88a10e8ad676426fee5ae7341b14 Support for sharing GREPROTO_CISCO port was added so that OVS gre port and kernel GRE devices can co-exist. After flow-based tunneling patches OVS GRE protocol processing is completely moved to ip_gre module. so there is no need for GRE protocol hook. Following patch consolidates GRE protocol related functions into ip_gre module. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net> 
Support for sharing GREPROTO_CISCO port was added so that
OVS gre port and kernel GRE devices can co-exist. After
flow-based tunneling patches OVS GRE protocol processing
is completely moved to ip_gre module. so there is no need
for GRE protocol hook. Following patch consolidates
GRE protocol related functions into ip_gre module.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
openvswitch: Use regular GRE net_device instead of vport 2015-08-10T21:03:54+00:00 Pravin B Shelar pshelar@nicira.com 2015-08-08T06:51:47+00:00 b2acd1dc3949cd60c571844d495594f05f0351f4 Using GRE tunnel meta data collection feature, we can implement OVS GRE vport. This patch removes all of the OVS specific GRE code and make OVS use a ip_gre net_device. Minimal GRE vport is kept to handle compatibility with current userspace application. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net> 
Using GRE tunnel meta data collection feature, we can implement
OVS GRE vport. This patch removes all of the OVS
specific GRE code and make OVS use a ip_gre net_device.
Minimal GRE vport is kept to handle compatibility with
current userspace application.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: Fix GRE RX to use skb_transport_header for GRE header offset 2014-09-08T22:23:05+00:00 Tom Herbert therbert@google.com 2014-09-08T15:29:12+00:00 1e701f16982a9d15488a5aa8c7f5c41444b1de67 GRE assumes that the GRE header is at skb_network_header + ip_hrdlen(skb). It is more general to use skb_transport_header and this allows the possbility of inserting additional header between IP and GRE (which is what we will done in Generic UDP Encapsulation for GRE). Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
GRE assumes that the GRE header is at skb_network_header +
ip_hrdlen(skb). It is more general to use skb_transport_header
and this allows the possbility of inserting additional header
between IP and GRE (which is what we will done in Generic UDP
Encapsulation for GRE).

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
gre: Add support for checksum unnecessary conversions 2014-09-02T04:36:28+00:00 Tom Herbert therbert@google.com 2014-08-31T22:12:44+00:00 884d338c041c2aa4536ade8620efa585e7c57f3c Call skb_checksum_try_convert and skb_gro_checksum_try_convert after checksum is found present and validated in the GRE header for normal and GRO paths respectively. In GRO path, call skb_gro_checksum_try_convert Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Call skb_checksum_try_convert and skb_gro_checksum_try_convert
after checksum is found present and validated in the GRE header
for normal and GRO paths respectively.

In GRO path, call skb_gro_checksum_try_convert

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: Clarification of CHECKSUM_UNNECESSARY 2014-08-30T03:41:11+00:00 Tom Herbert therbert@google.com 2014-08-28T04:26:46+00:00 77cffe23c1f88835f6bd7b47bfa0c060c2969828 This patch: - Clarifies the specific requirements of devices returning CHECKSUM_UNNECESSARY (comments in skbuff.h). - Adds csum_level field to skbuff. This is used to express how many checksums are covered by CHECKSUM_UNNECESSARY (stores n - 1). This replaces the overloading of skb->encapsulation, that field is is now only used to indicate inner headers are valid. - Change __skb_checksum_validate_needed to "consume" each checksum as indicated by csum_level as layers of the the packet are parsed. - Remove skb_pop_rcv_encapsulation, no longer needed in the new csum_level model. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
This patch:
 - Clarifies the specific requirements of devices returning
   CHECKSUM_UNNECESSARY (comments in skbuff.h).
 - Adds csum_level field to skbuff. This is used to express how
   many checksums are covered by CHECKSUM_UNNECESSARY (stores n - 1).
   This replaces the overloading of skb->encapsulation, that field is
   is now only used to indicate inner headers are valid.
 - Change __skb_checksum_validate_needed to "consume" each checksum
   as indicated by csum_level as layers of the the packet are parsed.
 - Remove skb_pop_rcv_encapsulation, no longer needed in the new
   csum_level model.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
gre: When GRE csum is present count as encap layer wrt csum 2014-08-25T01:09:24+00:00 Tom Herbert therbert@google.com 2014-08-22T20:34:52+00:00 48a5fc773190bd5339869003fa65d38559bb8890 In GRE demux if the GRE checksum pop rcv encapsulation so that any encapsulated checksums are treated as tunnel checksums. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
In GRE demux if the GRE checksum pop rcv encapsulation so that any
encapsulated checksums are treated as tunnel checksums.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
GRE: enable offloads for GRE 2014-07-11T20:53:39+00:00 Amritha Nambiar amritha.nambiar@intel.com 2014-07-11T00:29:21+00:00 d0a7ebbc119738439ff00f7fadbd343ae20ea5e8 To get offloads to work with Generic Routing Encapsulation (GRE), the outer transport header has to be reset after skb_push is done. This patch has the support for this fix and hence GRE offloading. Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com> Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com> Tested-By: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
To get offloads to work with Generic Routing Encapsulation (GRE), the
outer transport header has to be reset after skb_push is done. This
patch has the support for this fix and hence GRE offloading.

Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com>
Tested-By: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
gre: Call gso_make_checksum 2014-06-05T05:46:38+00:00 Tom Herbert therbert@google.com 2014-06-05T00:20:23+00:00 4749c09c37030ccdc44aecebe0f71b02a377fc14 Call gso_make_checksum. This should have the benefit of using a checksum that may have been previously computed for the packet. This also adds NETIF_F_GSO_GRE_CSUM to differentiate devices that offload GRE GSO with and without the GRE checksum offloaed. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Call gso_make_checksum. This should have the benefit of using a
checksum that may have been previously computed for the packet.

This also adds NETIF_F_GSO_GRE_CSUM to differentiate devices that
offload GRE GSO with and without the GRE checksum offloaed.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
gre: Call skb_checksum_simple_validate 2014-05-09T03:47:50+00:00 Tom Herbert therbert@google.com 2014-05-07T23:51:46+00:00 b1036c6a470ccf5f18490a7ce4c99422d3bf77c4 Use skb_checksum_simple_validate to verify checksum. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Use skb_checksum_simple_validate to verify checksum.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ip_tunnel: Fix dst ref-count. 2014-03-26T19:18:40+00:00 Pravin B Shelar pshelar@nicira.com 2014-03-24T05:06:36+00:00 fbd02dd405d0724a0f25897ed4a6813297c9b96f Commit 10ddceb22ba (ip_tunnel:multicast process cause panic due to skb->_skb_refdst NULL pointer) removed dst-drop call from ip-tunnel-recv. Following commit reintroduce dst-drop and fix the original bug by checking loopback packet before releasing dst. Original bug: https://bugzilla.kernel.org/show_bug.cgi?id=70681 CC: Xin Long <lucien.xin@gmail.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Commit 10ddceb22ba (ip_tunnel:multicast process cause panic due
to skb->_skb_refdst NULL pointer) removed dst-drop call from
ip-tunnel-recv.

Following commit reintroduce dst-drop and fix the original bug by
checking loopback packet before releasing dst.
Original bug: https://bugzilla.kernel.org/show_bug.cgi?id=70681

CC: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>