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GET /api/patches/1558022/?format=api
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{
    "id": 1558022,
    "url": "http://patchwork.ozlabs.org/api/patches/1558022/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/openvswitch/patch/20211122112256.2011194-6-amorenoz@redhat.com/",
    "project": {
        "id": 47,
        "url": "http://patchwork.ozlabs.org/api/projects/47/?format=api",
        "name": "Open vSwitch",
        "link_name": "openvswitch",
        "list_id": "ovs-dev.openvswitch.org",
        "list_email": "ovs-dev@openvswitch.org",
        "web_url": "http://openvswitch.org/",
        "scm_url": "git@github.com:openvswitch/ovs.git",
        "webscm_url": "https://github.com/openvswitch/ovs",
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<20211122112256.2011194-6-amorenoz@redhat.com>",
    "list_archive_url": null,
    "date": "2021-11-22T11:22:43",
    "name": "[ovs-dev,v1,05/18] build-aux: generate ofp field decoders",
    "commit_ref": null,
    "pull_url": null,
    "state": "changes-requested",
    "archived": false,
    "hash": "01807579a9b9bb9b8c112293b05a6ce9707ff5e4",
    "submitter": {
        "id": 77477,
        "url": "http://patchwork.ozlabs.org/api/people/77477/?format=api",
        "name": "Adrian Moreno",
        "email": "amorenoz@redhat.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/openvswitch/patch/20211122112256.2011194-6-amorenoz@redhat.com/mbox/",
    "series": [
        {
            "id": 273222,
            "url": "http://patchwork.ozlabs.org/api/series/273222/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/openvswitch/list/?series=273222",
            "date": "2021-11-22T11:22:39",
            "name": "python: add flow parsing library",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/273222/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/1558022/comments/",
    "check": "fail",
    "checks": "http://patchwork.ozlabs.org/api/patches/1558022/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        ],
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        ],
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        "X-MC-Unique": "J3hPEHvkMo65EaCQ2xeBgQ-1",
        "From": "Adrian Moreno <amorenoz@redhat.com>",
        "To": "dev@openvswitch.org",
        "Date": "Mon, 22 Nov 2021 12:22:43 +0100",
        "Message-Id": "<20211122112256.2011194-6-amorenoz@redhat.com>",
        "In-Reply-To": "<20211122112256.2011194-1-amorenoz@redhat.com>",
        "References": "<20211122112256.2011194-1-amorenoz@redhat.com>",
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        "X-Mimecast-Spam-Score": "0",
        "X-Mimecast-Originator": "redhat.com",
        "Subject": "[ovs-dev] [PATCH v1 05/18] build-aux: generate ofp field decoders",
        "X-BeenThere": "ovs-dev@openvswitch.org",
        "X-Mailman-Version": "2.1.15",
        "Precedence": "list",
        "List-Id": "<ovs-dev.openvswitch.org>",
        "List-Unsubscribe": "<https://mail.openvswitch.org/mailman/options/ovs-dev>,\n <mailto:ovs-dev-request@openvswitch.org?subject=unsubscribe>",
        "List-Archive": "<http://mail.openvswitch.org/pipermail/ovs-dev/>",
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        "Errors-To": "ovs-dev-bounces@openvswitch.org",
        "Sender": "\"dev\" <ovs-dev-bounces@openvswitch.org>"
    },
    "content": "Based on meta-field information extracted by extract_ofp_fields,\nautogenerate the right decoder to be used\n\nSigned-off-by: Adrian Moreno <amorenoz@redhat.com>\n---\n build-aux/automake.mk            |  3 +-\n build-aux/gen_ofp_field_decoders | 73 ++++++++++++++++++++++++++++++++\n python/.gitignore                |  1 +\n python/automake.mk               |  7 +++\n 4 files changed, 83 insertions(+), 1 deletion(-)\n create mode 100755 build-aux/gen_ofp_field_decoders",
    "diff": "diff --git a/build-aux/automake.mk b/build-aux/automake.mk\nindex 6267ccd7c..a8bb0acfd 100644\n--- a/build-aux/automake.mk\n+++ b/build-aux/automake.mk\n@@ -9,7 +9,8 @@ EXTRA_DIST += \\\n \tbuild-aux/sodepends.py \\\n \tbuild-aux/soexpand.py \\\n \tbuild-aux/text2c \\\n-\tbuild-aux/xml2nroff\n+\tbuild-aux/xml2nroff \\\n+\tbuild-aux/gen_ofp_field_decoders\n \n FLAKE8_PYFILES += \\\n     $(srcdir)/build-aux/xml2nroff \\\ndiff --git a/build-aux/gen_ofp_field_decoders b/build-aux/gen_ofp_field_decoders\nnew file mode 100755\nindex 000000000..e60410af8\n--- /dev/null\n+++ b/build-aux/gen_ofp_field_decoders\n@@ -0,0 +1,73 @@\n+#!/bin/env python\n+\n+import argparse\n+import re\n+import os\n+import sys\n+import importlib\n+\n+import build.extract_ofp_fields as extract_fields\n+\n+\n+def main():\n+    parser = argparse.ArgumentParser(\n+        description=\"Tool to generate python ofproto field decoders from\"\n+        \"meta-flow information\"\n+    )\n+    parser.add_argument(\n+        \"metaflow\",\n+        metavar=\"FILE\",\n+        type=str,\n+        help=\"Read meta-flow info from file\",\n+    )\n+\n+    args = parser.parse_args()\n+\n+    fields = extract_fields.extract_ofp_fields(args.metaflow)\n+\n+    field_decoders = {}\n+    for field in fields:\n+        decoder = get_decoder(field)\n+        field_decoders[field.get(\"name\")] = decoder\n+        if field.get(\"extra_name\"):\n+            field_decoders[field.get(\"extra_name\")] = decoder\n+\n+    code = \"\"\"\n+# This file is auto-generated. Do not edit\n+\n+import functools\n+from ovs.flows import decoders\n+\n+field_decoders = {{\n+{decoders}\n+}}\n+\"\"\".format(\n+        decoders=\"\\n\".join(\n+            [\n+                \"    '{name}': {decoder},\".format(name=name, decoder=decoder)\n+                for name, decoder in field_decoders.items()\n+            ]\n+        )\n+    )\n+    print(code)\n+\n+\n+def get_decoder(field):\n+    formatting = field.get(\"formatting\")\n+    if formatting in [\"decimal\", \"hexadecimal\"]:\n+        if field.get(\"mask\") == \"MFM_NONE\":\n+            return \"decoders.decode_int\"\n+        else:\n+            if field.get(\"n_bits\") in [8, 16, 32, 64, 128, 992]:\n+                return \"decoders.Mask{}\".format(field.get(\"n_bits\"))\n+            return \"decoders.decode_mask({})\".format(field.get(\"n_bits\"))\n+    elif formatting in [\"IPv4\", \"IPv6\"]:\n+        return \"decoders.IPMask\"\n+    elif formatting == \"Ethernet\":\n+        return \"decoders.EthMask\"\n+    else:\n+        return \"decoders.decode_default\"\n+\n+\n+if __name__ == \"__main__\":\n+    main()\ndiff --git a/python/.gitignore b/python/.gitignore\nindex 60ace6f05..c8ffd4574 100644\n--- a/python/.gitignore\n+++ b/python/.gitignore\n@@ -1,2 +1,3 @@\n dist/\n *.egg-info\n+ovs/flows/ofp_fields.py\ndiff --git a/python/automake.mk b/python/automake.mk\nindex b869eb355..9dfc62fce 100644\n--- a/python/automake.mk\n+++ b/python/automake.mk\n@@ -123,3 +123,10 @@ $(srcdir)/python/ovs/dirs.py: python/ovs/dirs.py.template\n \tmv $@.tmp $@\n EXTRA_DIST += python/ovs/dirs.py.template\n CLEANFILES += python/ovs/dirs.py\n+\n+$(srcdir)/python/ovs/flows/ofp_fields.py: $(srcdir)/build-aux/gen_ofp_field_decoders include/openvswitch/meta-flow.h\n+\t$(AM_V_GEN)$(run_python) $< $(srcdir)/include/openvswitch/meta-flow.h > $@.tmp\n+\t$(AM_V_at)mv $@.tmp $@\n+EXTRA_DIST += python/ovs/flows/ofp_fields.py\n+CLEANFILES += python/ovs/flows/ofp_fields.py\n+\n",
    "prefixes": [
        "ovs-dev",
        "v1",
        "05/18"
    ]
}