diff mbox series

[net-next,2/2] net: flow_dissector: Parse PTP L2 packet header

Message ID 1610023140-20256-3-git-send-email-eranbe@nvidia.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Dissect PTP L2 packet header | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for net-next
netdev/subject_prefix success Link
netdev/cc_maintainers warning 7 maintainers not CCed: kafai@fb.com ast@kernel.org gnault@redhat.com lariel@mellanox.com komachi.yoshiki@gmail.com jakub@cloudflare.com vladimir.oltean@nxp.com
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 28 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Eran Ben Elisha Jan. 7, 2021, 12:39 p.m. UTC 
Add support for parsing PTP L2 packet header. Such packet consists
of an L2 header (with ethertype of ETH_P_1588), PTP header, body
and an optional suffix.

Signed-off-by: Eran Ben Elisha <eranbe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
---
 net/core/flow_dissector.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 6f1adba6695f..fcaa223c7cdc 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -23,6 +23,7 @@ 
 #include <linux/if_ether.h>
 #include <linux/mpls.h>
 #include <linux/tcp.h>
+#include <linux/ptp_classify.h>
 #include <net/flow_dissector.h>
 #include <scsi/fc/fc_fcoe.h>
 #include <uapi/linux/batadv_packet.h>
@@ -1251,6 +1252,21 @@  bool __skb_flow_dissect(const struct net *net,
 						  &proto, &nhoff, hlen, flags);
 		break;
 
+	case htons(ETH_P_1588): {
+		struct ptp_header *hdr, _hdr;
+
+		hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data,
+					   hlen, &_hdr);
+		if (!hdr || (hlen - nhoff) < sizeof(_hdr)) {
+			fdret = FLOW_DISSECT_RET_OUT_BAD;
+			break;
+		}
+
+		nhoff += ntohs(hdr->message_length);
+		fdret = FLOW_DISSECT_RET_OUT_GOOD;
+		break;
+	}
+
 	default:
 		fdret = FLOW_DISSECT_RET_OUT_BAD;
 		break;