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authorHoratiu Vultur <horatiu.vultur@microchip.com>2021-06-26 22:18:04 +0200
committerDavid S. Miller <davem@davemloft.net>2021-06-28 15:46:10 -0700
commitf7458934b0791c39a001e4d902fc3bf697b439b5 (patch)
tree4e3b03510b8b2984b5edbda94c6fd202cb8c6355 /net
parentf0305e732a1a144dcdb1536b828ee4a5cc1d212f (diff)
net: bridge: mrp: Update the Test frames for MRA
According to the standard IEC 62439-2, in case the node behaves as MRA and needs to send Test frames on ring ports, then these Test frames need to have an Option TLV and a Sub-Option TLV which has the type AUTO_MGR. Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_mrp.c27
-rw-r--r--net/bridge/br_private_mrp.h11
2 files changed, 38 insertions, 0 deletions
diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c
index f7012b7d7ce4..fd2de35ffb3c 100644
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c
@@ -204,6 +204,33 @@ static struct sk_buff *br_mrp_alloc_test_skb(struct br_mrp *mrp,
hdr->timestamp = cpu_to_be32(jiffies_to_msecs(jiffies));
br_mrp_skb_common(skb, mrp);
+
+ /* In case the node behaves as MRA then the Test frame needs to have
+ * an Option TLV which includes eventually a sub-option TLV that has
+ * the type AUTO_MGR
+ */
+ if (mrp->ring_role == BR_MRP_RING_ROLE_MRA) {
+ struct br_mrp_sub_option1_hdr *sub_opt = NULL;
+ struct br_mrp_tlv_hdr *sub_tlv = NULL;
+ struct br_mrp_oui_hdr *oui = NULL;
+ u8 length;
+
+ length = sizeof(*sub_opt) + sizeof(*sub_tlv) + sizeof(oui) +
+ MRP_OPT_PADDING;
+ br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_OPTION, length);
+
+ oui = skb_put(skb, sizeof(*oui));
+ memset(oui, 0x0, sizeof(*oui));
+ sub_opt = skb_put(skb, sizeof(*sub_opt));
+ memset(sub_opt, 0x0, sizeof(*sub_opt));
+
+ sub_tlv = skb_put(skb, sizeof(*sub_tlv));
+ sub_tlv->type = BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR;
+
+ /* 32 bit alligment shall be ensured therefore add 2 bytes */
+ skb_put(skb, MRP_OPT_PADDING);
+ }
+
br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_END, 0x0);
return skb;
diff --git a/net/bridge/br_private_mrp.h b/net/bridge/br_private_mrp.h
index 9559aa2750fb..bda8e1896712 100644
--- a/net/bridge/br_private_mrp.h
+++ b/net/bridge/br_private_mrp.h
@@ -6,6 +6,8 @@
#include "br_private.h"
#include <uapi/linux/mrp_bridge.h>
+#define MRP_OPT_PADDING 0x2
+
struct br_mrp {
/* list of mrp instances */
struct hlist_node list;
@@ -134,4 +136,13 @@ struct br_mrp_in_test_hdr {
__be32 timestamp;
} __attribute__((__packed__));
+struct br_mrp_oui_hdr {
+ __u8 oui[MRP_OUI_LENGTH];
+};
+
+struct br_mrp_sub_option1_hdr {
+ __u8 type;
+ __u8 data[MRP_MANUFACTURE_DATA_LENGTH];
+};
+
#endif /* _BR_PRIVATE_MRP_H */