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{ "id": 819021, "url": "http://patchwork.ozlabs.org/api/covers/819021/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/cover/1506500194-17637-1-git-send-email-simon.horman@netronome.com/", "project": { "id": 7, "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api", "name": "Linux network development", "link_name": "netdev", "list_id": "netdev.vger.kernel.org", "list_email": "netdev@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1506500194-17637-1-git-send-email-simon.horman@netronome.com>", "list_archive_url": null, "date": "2017-09-27T08:16:32", "name": "[v2,net-next,0/2] net/sched: support tunnel options in cls_flower and act_tunnel_key", "submitter": { "id": 64714, "url": "http://patchwork.ozlabs.org/api/people/64714/?format=api", "name": "Simon Horman", "email": "simon.horman@netronome.com" }, "mbox": "http://patchwork.ozlabs.org/project/netdev/cover/1506500194-17637-1-git-send-email-simon.horman@netronome.com/mbox/", "series": [ { "id": 5305, "url": "http://patchwork.ozlabs.org/api/series/5305/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=5305", "date": "2017-09-27T08:16:32", "name": "net/sched: support tunnel options in cls_flower and act_tunnel_key", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/5305/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/819021/comments/", "headers": { "Return-Path": "<netdev-owner@vger.kernel.org>", "X-Original-To": "patchwork-incoming@ozlabs.org", "Delivered-To": "patchwork-incoming@ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; 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\n\tWed, 27 Sep 2017 01:16:48 -0700 (PDT)", "From": "Simon Horman <simon.horman@netronome.com>", "To": "David Miller <davem@davemloft.net>, Jiri Pirko <jiri@mellanox.com>", "Cc": "Jamal Hadi Salim <jhs@mojatatu.com>,\n\tCong Wang <xiyou.wangcong@gmail.com>, netdev@vger.kernel.org,\n\toss-drivers@netronome.com, Simon Horman <simon.horman@netronome.com>", "Subject": "[PATCH v2 net-next 0/2] net/sched: support tunnel options in\n\tcls_flower and act_tunnel_key", "Date": "Wed, 27 Sep 2017 10:16:32 +0200", "Message-Id": "<1506500194-17637-1-git-send-email-simon.horman@netronome.com>", "X-Mailer": "git-send-email 2.1.4", "Sender": "netdev-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<netdev.vger.kernel.org>", "X-Mailing-List": "netdev@vger.kernel.org" }, "content": "Allow the flower classifier to match on tunnel options and the\ntunnel key action to set them.\n\nTunnel options are a bytestring of up to 256 bytes.\nThe flower classifier matching with an optional bitwise mask.\nTunnel implementations may support more or less options,\nor none at all.\n\n\nDiscussion stemming from review of RFC:\n\nThis feature is to be used in conjunction with tunnels in collect metadata\n(external) mode. As I understand it there are three tunnel netdevs that use\noptions metadata in the kernel at this time.\n\n* Geneve\n\n In the case of Geneve options are TLVs[1]. My reading is that in collect\n metadata mode the kernel does not appear to do anything other than pass\n them around as a bytestring.\n\n [1] https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05#section-3.5\n\n* VXLAN-GBP\n\n In the case of VXLAN-GBP on RX in collect metadata mode options are used\n to carry information parsed in vxlan_parse_gbp_hdr() from the VXLAN Group\n Based Policy Extension[2]. On RX the options data is used to create an\n extension (header) by vxlan_build_gbp_hdr().\n\n [2] https://tools.ietf.org/html/draft-smith-vxlan-group-policy-03#section-2.1\n\n* ERSPAN (GRE)\n\n In the case of ERSPAN, which is a variant of GRE, on RX in collect\n metadata mode options are used to carry the index parsed from the ERSPAN\n Type II feature header[3] in erspan_rcv(). The converse is true on TX\n and is handled by erspan_fb_xmit().\n\n [3] https://tools.ietf.org/html/draft-foschiano-erspan-03#section-4.2\n\nUsers of options:\n\n* There are eBPF hooks to allow getting on and setting tunnel metadata:\n bpf_skb_set_tunnel_opt, bpf_skb_get_tunnel_opt.\n\n* Open vSwitch is able to match and set Geneve and VXLAN-GBP options.\n\nNeither of the above appear to assume any structure for the data.\n\n\nChanges since RFC:\n* Drop RFC prefix\n* Correct changelogs and enhance cover letter.\n\n\nSimon Horman (2):\n net/sched: add tunnel option support to act_tunnel_key\n net/sched: allow flower to match tunnel options\n\n include/net/flow_dissector.h | 13 ++++++++++++\n include/uapi/linux/pkt_cls.h | 3 +++\n include/uapi/linux/tc_act/tc_tunnel_key.h | 1 +\n net/sched/act_tunnel_key.c | 26 ++++++++++++++++++-----\n net/sched/cls_flower.c | 35 ++++++++++++++++++++++++++++++-\n 5 files changed, 72 insertions(+), 6 deletions(-)" }