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net: bridge: mrp: Update the Test frames for MRA

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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>
This commit is contained in:
Horatiu Vultur 2021-06-26 22:18:04 +02:00 committed by David S. Miller
parent f0305e732a
commit f7458934b0
2 changed files with 38 additions and 0 deletions
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27
net/bridge/br_mrp.c
View file

@ -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;

11
net/bridge/br_private_mrp.h
View file

@ -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 */