diff options
| -rw-r--r-- | net/hsr/hsr_device.c | 64 | ||||
| -rw-r--r-- | net/hsr/hsr_forward.c | 4 | ||||
| -rw-r--r-- | net/hsr/hsr_main.h | 22 |
3 files changed, 88 insertions, 2 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index 006e715eccb6..74eaf28743a4 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -238,6 +238,10 @@ static struct sk_buff *hsr_init_skb(struct hsr_port *master, u16 proto) hlen = LL_RESERVED_SPACE(master->dev); tlen = master->dev->needed_tailroom; + /* skb size is same for PRP/HSR frames, only difference + * being, for PRP it is a trailer and for HSR it is a + * header + */ skb = dev_alloc_skb(sizeof(struct hsr_tag) + sizeof(struct hsr_sup_tag) + sizeof(struct hsr_sup_payload) + hlen + tlen); @@ -336,6 +340,55 @@ static void send_hsr_supervision_frame(struct hsr_port *master, return; } +static void send_prp_supervision_frame(struct hsr_port *master, + unsigned long *interval) +{ + struct hsr_priv *hsr = master->hsr; + struct hsr_sup_payload *hsr_sp; + struct hsr_sup_tag *hsr_stag; + unsigned long irqflags; + struct sk_buff *skb; + struct prp_rct *rct; + u8 *tail; + + skb = hsr_init_skb(master, ETH_P_PRP); + if (!skb) { + WARN_ONCE(1, "PRP: Could not send supervision frame\n"); + return; + } + + *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); + hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag)); + set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); + set_hsr_stag_HSR_ver(hsr_stag, (hsr->prot_version ? 1 : 0)); + + /* From HSRv1 on we have separate supervision sequence numbers. */ + spin_lock_irqsave(&master->hsr->seqnr_lock, irqflags); + hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); + hsr->sup_sequence_nr++; + hsr_stag->HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD; + hsr_stag->HSR_TLV_length = sizeof(struct hsr_sup_payload); + + /* Payload: MacAddressA */ + hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); + ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr); + + if (skb_put_padto(skb, ETH_ZLEN + HSR_HLEN)) { + spin_unlock_irqrestore(&master->hsr->seqnr_lock, irqflags); + return; + } + + tail = skb_tail_pointer(skb) - HSR_HLEN; + rct = (struct prp_rct *)tail; + rct->PRP_suffix = htons(ETH_P_PRP); + set_prp_LSDU_size(rct, HSR_V1_SUP_LSDUSIZE); + rct->sequence_nr = htons(hsr->sequence_nr); + hsr->sequence_nr++; + spin_unlock_irqrestore(&master->hsr->seqnr_lock, irqflags); + + hsr_forward_skb(skb, master); +} + /* Announce (supervision frame) timer function */ static void hsr_announce(struct timer_list *t) @@ -389,6 +442,10 @@ static struct hsr_proto_ops hsr_ops = { .send_sv_frame = send_hsr_supervision_frame, }; +struct hsr_proto_ops prp_ops = { + .send_sv_frame = send_prp_supervision_frame, +}; + void hsr_dev_setup(struct net_device *dev) { eth_hw_addr_random(dev); @@ -452,7 +509,12 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], if (protocol_version == PRP_V1) return -EPROTONOSUPPORT; - hsr->proto_ops = &hsr_ops; + /* initialize protocol specific functions */ + if (protocol_version == PRP_V1) + hsr->proto_ops = &prp_ops; + else + hsr->proto_ops = &hsr_ops; + /* Make sure we recognize frames from ourselves in hsr_rcv() */ res = hsr_create_self_node(hsr, hsr_dev->dev_addr, slave[1]->dev_addr); diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c index 55adb4dbd235..dedf8ac6f992 100644 --- a/net/hsr/hsr_forward.c +++ b/net/hsr/hsr_forward.c @@ -76,7 +76,9 @@ static bool is_supervision_frame(struct hsr_priv *hsr, struct sk_buff *skb) } if (hsr_sup_tag->HSR_TLV_type != HSR_TLV_ANNOUNCE && - hsr_sup_tag->HSR_TLV_type != HSR_TLV_LIFE_CHECK) + hsr_sup_tag->HSR_TLV_type != HSR_TLV_LIFE_CHECK && + hsr_sup_tag->HSR_TLV_type != PRP_TLV_LIFE_CHECK_DD && + hsr_sup_tag->HSR_TLV_type != PRP_TLV_LIFE_CHECK_DA) return false; if (hsr_sup_tag->HSR_TLV_length != 12 && hsr_sup_tag->HSR_TLV_length != sizeof(struct hsr_sup_payload)) diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h index 671270115a50..58e1ad21b66f 100644 --- a/net/hsr/hsr_main.h +++ b/net/hsr/hsr_main.h @@ -35,6 +35,10 @@ #define HSR_TLV_ANNOUNCE 22 #define HSR_TLV_LIFE_CHECK 23 +/* PRP V1 life check for Duplicate discard */ +#define PRP_TLV_LIFE_CHECK_DD 20 +/* PRP V1 life check for Duplicate Accept */ +#define PRP_TLV_LIFE_CHECK_DA 21 /* HSR Tag. * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB, @@ -126,6 +130,24 @@ enum hsr_port_type { HSR_PT_PORTS, /* This must be the last item in the enum */ }; +/* PRP Redunancy Control Trailor (RCT). + * As defined in IEC-62439-4:2012, the PRP RCT is really { sequence Nr, + * Lan indentifier (LanId), LSDU_size and PRP_suffix = 0x88FB }. + * + * Field names as defined in the IEC:2012 standard for PRP. + */ +struct prp_rct { + __be16 sequence_nr; + __be16 lan_id_and_LSDU_size; + __be16 PRP_suffix; +} __packed; + +static inline void set_prp_LSDU_size(struct prp_rct *rct, u16 LSDU_size) +{ + rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) & + 0xF000) | (LSDU_size & 0x0FFF)); +} + struct hsr_port { struct list_head port_list; struct net_device *dev; |