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{
    "id": 2231879,
    "url": "http://patchwork.ozlabs.org/api/1.1/patches/2231879/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/openvswitch/patch/20260501133924.3100680-2-houminxi@gmail.com/",
    "project": {
        "id": 47,
        "url": "http://patchwork.ozlabs.org/api/1.1/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"
    },
    "msgid": "<20260501133924.3100680-2-houminxi@gmail.com>",
    "date": "2026-05-01T13:39:22",
    "name": "[ovs-dev,net-next,v2,1/2] selftests: openvswitch: add vlan() and encap() flow string parsing",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "c40be7d16bad05016bbd92e41d86278949bab6ad",
    "submitter": {
        "id": 93141,
        "url": "http://patchwork.ozlabs.org/api/1.1/people/93141/?format=api",
        "name": "Minxi Hou",
        "email": "houminxi@gmail.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/openvswitch/patch/20260501133924.3100680-2-houminxi@gmail.com/mbox/",
    "series": [
        {
            "id": 502459,
            "url": "http://patchwork.ozlabs.org/api/1.1/series/502459/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/openvswitch/list/?series=502459",
            "date": "2026-05-01T13:39:21",
            "name": "selftests: openvswitch: add pop_vlan test",
            "version": 2,
            "mbox": "http://patchwork.ozlabs.org/series/502459/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2231879/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2231879/checks/",
    "tags": {},
    "headers": {
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        "From": "Minxi Hou <houminxi@gmail.com>",
        "To": "netdev@vger.kernel.org",
        "Date": "Fri,  1 May 2026 21:39:22 +0800",
        "Message-ID": "<20260501133924.3100680-2-houminxi@gmail.com>",
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        "References": "<20260501133924.3100680-1-houminxi@gmail.com>",
        "MIME-Version": "1.0",
        "Subject": "[ovs-dev] [PATCH net-next v2 1/2] selftests: openvswitch: add\n vlan() and encap() flow string parsing",
        "X-BeenThere": "ovs-dev@openvswitch.org",
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        "Cc": "dev@openvswitch.org, Simon Horman <horms@kernel.org>,\n Minxi Hou <houminxi@gmail.com>, linux-kernel@vger.kernel.org,\n Ilya Maximets <i.maximets@ovn.org>, Eric Dumazet <edumazet@google.com>,\n linux-kselftest@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,\n Paolo Abeni <pabeni@redhat.com>, Shuah Khan <shuah@kernel.org>,\n \"David S. Miller\" <davem@davemloft.net>",
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        "Errors-To": "ovs-dev-bounces@openvswitch.org",
        "Sender": "\"dev\" <ovs-dev-bounces@openvswitch.org>"
    },
    "content": "Extend the ovs-dpctl.py flow parser to support vlan() and encap()\nmatch strings.  vlan() accepts tci=, vid=, pcp=, and cfi=\nparameters and generates the OVS_KEY_ATTR_VLAN attribute with a TCI\nvalue in network byte order.  encap() parses nested flow strings\nand returns OVS_KEY_ATTR_ENCAP with inner key attributes as a\nrecursive NLA container.\n\nThe encap nla_map type is changed from \"none\" to \"nested\" so that\npyroute2 recursively encodes the inner flow key attributes.  The\nVLAN nla_map type is changed from \"uint16\" to \"be16\" to match the\nkernel's big-endian wire format.\n\nSigned-off-by: Minxi Hou <houminxi@gmail.com>\n---\nv1 -> v2: rebase to latest net-next/main, drop --base=auto\n\n .../selftests/net/openvswitch/ovs-dpctl.py    | 190 +++++++++++++++++-\n 1 file changed, 188 insertions(+), 2 deletions(-)",
    "diff": "diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py\nindex 848f61fdcee0..317be7878937 100644\n--- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py\n+++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py\n@@ -901,11 +901,11 @@ class ovskey(nla):\n     nla_flags = NLA_F_NESTED\n     nla_map = (\n         (\"OVS_KEY_ATTR_UNSPEC\", \"none\"),\n-        (\"OVS_KEY_ATTR_ENCAP\", \"none\"),\n+        (\"OVS_KEY_ATTR_ENCAP\", \"nested\"),\n         (\"OVS_KEY_ATTR_PRIORITY\", \"uint32\"),\n         (\"OVS_KEY_ATTR_IN_PORT\", \"uint32\"),\n         (\"OVS_KEY_ATTR_ETHERNET\", \"ethaddr\"),\n-        (\"OVS_KEY_ATTR_VLAN\", \"uint16\"),\n+        (\"OVS_KEY_ATTR_VLAN\", \"be16\"),\n         (\"OVS_KEY_ATTR_ETHERTYPE\", \"be16\"),\n         (\"OVS_KEY_ATTR_IPV4\", \"ovs_key_ipv4\"),\n         (\"OVS_KEY_ATTR_IPV6\", \"ovs_key_ipv6\"),\n@@ -1636,6 +1636,180 @@ class ovskey(nla):\n     class ovs_key_mpls(nla):\n         fields = ((\"lse\", \">I\"),)\n \n+    # 802.1Q CFI (Canonical Format Indicator) bit, always set for Ethernet\n+    _VLAN_CFI_MASK = 0x1000\n+    _MAX_ENCAP_DEPTH = 4\n+    _encap_depth = 0  # single-threaded usage assumed\n+\n+    @staticmethod\n+    def _parse_vlan_from_flowstr(flowstr):\n+        \"\"\"Parse vlan(tci=X) or vlan(vid=X[,pcp=Y,cfi=Z]) from flowstr.\n+\n+        Returns (remaining_flowstr, key_tci, mask_tci).\n+        TCI values use standard bit layout (VID bits 0-11,\n+        CFI bit 12, PCP bits 13-15); byte order conversion to\n+        big-endian happens in pyroute2 be16 NLA serialization.\n+        The mask covers only the fields the caller specified:\n+        vid -> 0x0FFF, pcp -> 0xE000, cfi -> 0x1000, tci -> 0xFFFF.\n+\n+        The tci= key sets the raw TCI bitfield (no CFI validation) to allow\n+        non-Ethernet use cases.  Use cfi=1 for standard Ethernet VLAN matching.\n+        \"\"\"\n+        tci = 0\n+        mask = 0\n+        has_tci = False\n+        has_vid = has_pcp = has_cfi = False\n+        _tci_mix_err = \"vlan(): 'tci' cannot be mixed \" \\\n+                       \"with 'vid'/'pcp'/'cfi'\"\n+        first = True\n+        while True:\n+            flowstr = flowstr.lstrip()\n+            if not flowstr:\n+                raise ValueError(\"vlan(): missing ')'\")\n+            if flowstr[0] == ')':\n+                break\n+            if not first:\n+                flowstr = flowstr[1:]  # skip ','\n+                if not flowstr:\n+                    raise ValueError(\"vlan(): missing ')' after trailing comma\")\n+                flowstr = flowstr.lstrip()\n+                if flowstr and flowstr[0] == ')':\n+                    break\n+                if flowstr and flowstr[0] == ',':\n+                    raise ValueError(\n+                        \"vlan(): empty or extra comma in field list\")\n+            first = False\n+\n+            eq = flowstr.find('=')\n+            if eq == -1:\n+                raise ValueError(\"vlan(): expected key=value, got '%s'\" % flowstr)\n+            key = flowstr[:eq].strip()\n+            flowstr = flowstr[eq + 1:]\n+\n+            end = flowstr.find(',')\n+            end2 = flowstr.find(')')\n+            if end == -1 or (end2 != -1 and end2 < end):\n+                end = end2\n+            val = flowstr[:end].strip()\n+            flowstr = flowstr[end:]\n+\n+            if not val:\n+                raise ValueError(\"vlan(): empty value for key '%s'\" % key)\n+            try:\n+                v = int(val, 16) if val.startswith(('0x', '0X')) else int(val)\n+            except ValueError:\n+                raise ValueError(\"vlan(): invalid value '%s' for key '%s'\" %\n+                                 (val, key))\n+\n+            if key == 'tci':\n+                if has_tci:\n+                    raise ValueError(\"vlan(): duplicate 'tci'\")\n+                if has_vid or has_pcp or has_cfi:\n+                    raise ValueError(_tci_mix_err)\n+                if v > 0xFFFF or v < 0:\n+                    raise ValueError(\"vlan(): tci=0x%x out of range\" % v)\n+                tci = v\n+                mask = 0xFFFF\n+                has_tci = True\n+            elif key == 'vid':\n+                if has_tci:\n+                    raise ValueError(_tci_mix_err)\n+                if has_vid:\n+                    raise ValueError(\"vlan(): duplicate 'vid'\")\n+                if v < 0 or v > 0xFFF:\n+                    raise ValueError(\"vlan(): vid=%d out of range (0-4095)\" % v)\n+                tci |= v\n+                mask |= 0x0FFF\n+                has_vid = True\n+            elif key == 'pcp':\n+                if has_tci:\n+                    raise ValueError(_tci_mix_err)\n+                if has_pcp:\n+                    raise ValueError(\"vlan(): duplicate 'pcp'\")\n+                if v < 0 or v > 7:\n+                    raise ValueError(\"vlan(): pcp=%d out of range (0-7)\" % v)\n+                tci |= (v & 0x7) << 13\n+                mask |= 0xE000\n+                has_pcp = True\n+            elif key == 'cfi':\n+                if has_tci:\n+                    raise ValueError(_tci_mix_err)\n+                if has_cfi:\n+                    raise ValueError(\"vlan(): duplicate 'cfi'\")\n+                if v != 1:\n+                    raise ValueError(\"vlan(): cfi must be 1 for Ethernet\")\n+                tci |= ovskey._VLAN_CFI_MASK\n+                mask |= ovskey._VLAN_CFI_MASK\n+                has_cfi = True\n+            else:\n+                raise ValueError(\"vlan(): unknown key '%s'\" % key)\n+\n+        flowstr = flowstr[1:]  # skip ')'\n+        # Catch immediate '))' (user error).  A ')' after ',' is consumed\n+        # by parse()'s strspn(flowstr, \"), \") inter-field separator stripping.\n+        if flowstr.lstrip().startswith(')'):\n+            raise ValueError(\"vlan(): unmatched ')'\")\n+        # parse() strips trailing ',', ')', ' ' as inter-field separators,\n+        # so we do not need to call strspn here.\n+\n+        if mask == 0:\n+            raise ValueError(\"vlan(): no fields specified, \"\n+                             \"use vlan(vid=X[,pcp=Y,cfi=Z]) or vlan(tci=X)\")\n+        if not has_tci:\n+            tci |= ovskey._VLAN_CFI_MASK\n+            mask |= ovskey._VLAN_CFI_MASK\n+        return flowstr, tci, mask\n+\n+    @staticmethod\n+    def _parse_encap_from_flowstr(flowstr):\n+        \"\"\"Parse encap(inner_flow) from flowstr.\n+\n+        Returns (remaining_flowstr, inner_key_dict, inner_mask_dict)\n+        where each dict has an 'attrs' key for recursive NLA encoding.\n+        Parenthesis-depth tracking handles nested encap() calls but not\n+        quoted strings containing literal parentheses.\n+        \"\"\"\n+        if ovskey._encap_depth >= ovskey._MAX_ENCAP_DEPTH:\n+            raise ValueError(\"encap(): max nesting depth %d exceeded\" %\n+                             ovskey._MAX_ENCAP_DEPTH)\n+        try:\n+            ovskey._encap_depth += 1\n+            depth = 1\n+            end = -1\n+            for i, c in enumerate(flowstr):\n+                if c == '(':\n+                    depth += 1\n+                elif c == ')':\n+                    depth -= 1\n+                    if depth < 0:\n+                        raise ValueError(\"encap(): unmatched ')' at position %d\" % i)\n+                    if depth == 0:\n+                        end = i\n+                        break\n+\n+            if end == -1:\n+                if depth > 1:\n+                    raise ValueError(\"encap(): missing ')' at end\")\n+                raise ValueError(\"encap(): missing closing ')'\")\n+\n+            inner_str = flowstr[:end].strip()\n+            if not inner_str:\n+                raise ValueError(\"encap(): empty inner flow\")\n+\n+            flowstr = flowstr[end + 1:]\n+            if flowstr.lstrip().startswith(')'):\n+                raise ValueError(\"encap(): unmatched ')' after encap()\")\n+            # parse() strips trailing ',', ')', ' ' as inter-field separators,\n+            # so we do not need to call strspn here.\n+\n+            inner_key = ovskey()\n+            inner_mask = ovskey()\n+            inner_key.parse(inner_str, inner_mask)\n+\n+            return flowstr, inner_key, inner_mask\n+        finally:\n+            ovskey._encap_depth -= 1\n+\n     def parse(self, flowstr, mask=None):\n         for field in (\n             (\"OVS_KEY_ATTR_PRIORITY\", \"skb_priority\", intparse),\n@@ -1657,6 +1831,16 @@ class ovskey(nla):\n                 \"eth_type\",\n                 lambda x: intparse(x, \"0xffff\"),\n             ),\n+            (\n+                \"OVS_KEY_ATTR_VLAN\",\n+                \"vlan\",\n+                ovskey._parse_vlan_from_flowstr,\n+            ),\n+            (\n+                \"OVS_KEY_ATTR_ENCAP\",\n+                \"encap\",\n+                ovskey._parse_encap_from_flowstr,\n+            ),\n             (\n                 \"OVS_KEY_ATTR_IPV4\",\n                 \"ipv4\",\n@@ -1794,6 +1978,8 @@ class ovskey(nla):\n                 True,\n             ),\n             (\"OVS_KEY_ATTR_ETHERNET\", None, None, False, False),\n+            (\"OVS_KEY_ATTR_VLAN\", \"vlan\", \"0x%04x\", lambda x: False, True),\n+            (\"OVS_KEY_ATTR_ENCAP\", None, None, False, False),\n             (\n                 \"OVS_KEY_ATTR_ETHERTYPE\",\n                 \"eth_type\",\n",
    "prefixes": [
        "ovs-dev",
        "net-next",
        "v2",
        "1/2"
    ]
}