diff mbox series

[net-next,v4,09/13] flow_dissector: Parse Geneve in UDP

Message ID 20240823201557.1794985-10-tom@herbertland.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series flow_dissector: Dissect UDP encapsulation protocols | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 16 this patch: 16
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 2 maintainers not CCed: pabeni@redhat.com ast@fiberby.net
netdev/build_clang success Errors and warnings before: 16 this patch: 16
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 17 this patch: 17
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 47 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 3 this patch: 3
netdev/source_inline success Was 0 now: 0

Commit Message

Tom Herbert Aug. 23, 2024, 8:15 p.m. UTC 
Parse Geneve in a UDP encapsulation

Signed-off-by: Tom Herbert <tom@herbertland.com>
---
 net/core/flow_dissector.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
diff mbox series

Patch

diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index dd126e72f880..1deb9c3a75aa 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -11,6 +11,7 @@ 
 #include <net/fou.h>
 #include <net/ip.h>
 #include <net/ipv6.h>
+#include <net/geneve.h>
 #include <net/gre.h>
 #include <net/pptp.h>
 #include <net/tipc.h>
@@ -797,6 +798,29 @@  __skb_flow_dissect_vxlan(const struct sk_buff *skb,
 	return FLOW_DISSECT_RET_PROTO_AGAIN;
 }
 
+static enum flow_dissect_ret
+__skb_flow_dissect_geneve(const struct sk_buff *skb,
+			  struct flow_dissector *flow_dissector,
+			  void *target_container, const void *data,
+			  __be16 *p_proto, int *p_nhoff, int hlen,
+			  unsigned int flags)
+{
+	struct genevehdr *hdr, _hdr;
+
+	hdr = __skb_header_pointer(skb, *p_nhoff, sizeof(_hdr), data, hlen,
+				   &_hdr);
+	if (!hdr)
+		return FLOW_DISSECT_RET_OUT_BAD;
+
+	if (hdr->ver != 0)
+		return FLOW_DISSECT_RET_OUT_GOOD;
+
+	*p_proto = hdr->proto_type;
+	*p_nhoff += sizeof(struct genevehdr) + (hdr->opt_len * 4);
+
+	return FLOW_DISSECT_RET_PROTO_AGAIN;
+}
+
 /**
  * __skb_flow_dissect_batadv() - dissect batman-adv header
  * @skb: sk_buff to with the batman-adv header
@@ -989,6 +1013,11 @@  __skb_flow_dissect_udp(const struct sk_buff *skb, const struct net *net,
 					       p_proto, &nhoff, hlen, flags,
 					       encap_type == UDP_ENCAP_VXLAN_GPE);
 		break;
+	case UDP_ENCAP_GENEVE:
+		ret = __skb_flow_dissect_geneve(skb, flow_dissector,
+						target_container, data,
+						p_proto, &nhoff, hlen, flags);
+		break;
 	default:
 		break;
 	}