*
* Author(s):
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
+ *
+ * Frame router for HSR and PRP.
*/
#include "hsr_forward.h"
struct hsr_node;
-struct hsr_frame_info {
- struct sk_buff *skb_std;
- struct sk_buff *skb_hsr;
- struct hsr_port *port_rcv;
- struct hsr_node *node_src;
- u16 sequence_nr;
- bool is_supervision;
- bool is_vlan;
- bool is_local_dest;
- bool is_local_exclusive;
-};
-
/* The uses I can see for these HSR supervision frames are:
* 1) Use the frames that are sent after node initialization ("HSR_TLV.Type =
* 22") to reset any sequence_nr counters belonging to that node. Useful if
}
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))
return true;
}
-static struct sk_buff *create_stripped_skb(struct sk_buff *skb_in,
- struct hsr_frame_info *frame)
+static struct sk_buff *create_stripped_skb_hsr(struct sk_buff *skb_in,
+ struct hsr_frame_info *frame)
{
struct sk_buff *skb;
int copylen;
return skb;
}
-static struct sk_buff *frame_get_stripped_skb(struct hsr_frame_info *frame,
- struct hsr_port *port)
+struct sk_buff *hsr_get_untagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port)
{
- if (!frame->skb_std)
- frame->skb_std = create_stripped_skb(frame->skb_hsr, frame);
+ if (!frame->skb_std) {
+ if (frame->skb_hsr) {
+ frame->skb_std =
+ create_stripped_skb_hsr(frame->skb_hsr, frame);
+ } else {
+ /* Unexpected */
+ WARN_ONCE(1, "%s:%d: Unexpected frame received (port_src %s)\n",
+ __FILE__, __LINE__, port->dev->name);
+ return NULL;
+ }
+ }
+
return skb_clone(frame->skb_std, GFP_ATOMIC);
}
+struct sk_buff *prp_get_untagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port)
+{
+ if (!frame->skb_std) {
+ if (frame->skb_prp) {
+ /* trim the skb by len - HSR_HLEN to exclude RCT */
+ skb_trim(frame->skb_prp,
+ frame->skb_prp->len - HSR_HLEN);
+ frame->skb_std =
+ __pskb_copy(frame->skb_prp,
+ skb_headroom(frame->skb_prp),
+ GFP_ATOMIC);
+ } else {
+ /* Unexpected */
+ WARN_ONCE(1, "%s:%d: Unexpected frame received (port_src %s)\n",
+ __FILE__, __LINE__, port->dev->name);
+ return NULL;
+ }
+ }
+
+ return skb_clone(frame->skb_std, GFP_ATOMIC);
+}
+
+static void prp_set_lan_id(struct prp_rct *trailer,
+ struct hsr_port *port)
+{
+ int lane_id;
+
+ if (port->type == HSR_PT_SLAVE_A)
+ lane_id = 0;
+ else
+ lane_id = 1;
+
+ /* Add net_id in the upper 3 bits of lane_id */
+ lane_id |= port->hsr->net_id;
+ set_prp_lan_id(trailer, lane_id);
+}
+
+/* Tailroom for PRP rct should have been created before calling this */
+static struct sk_buff *prp_fill_rct(struct sk_buff *skb,
+ struct hsr_frame_info *frame,
+ struct hsr_port *port)
+{
+ struct prp_rct *trailer;
+ int min_size = ETH_ZLEN;
+ int lsdu_size;
+
+ if (!skb)
+ return skb;
+
+ if (frame->is_vlan)
+ min_size = VLAN_ETH_ZLEN;
+
+ if (skb_put_padto(skb, min_size))
+ return NULL;
+
+ trailer = (struct prp_rct *)skb_put(skb, HSR_HLEN);
+ lsdu_size = skb->len - 14;
+ if (frame->is_vlan)
+ lsdu_size -= 4;
+ prp_set_lan_id(trailer, port);
+ set_prp_LSDU_size(trailer, lsdu_size);
+ trailer->sequence_nr = htons(frame->sequence_nr);
+ trailer->PRP_suffix = htons(ETH_P_PRP);
+
+ return skb;
+}
+
+static void hsr_set_path_id(struct hsr_ethhdr *hsr_ethhdr,
+ struct hsr_port *port)
+{
+ int path_id;
+
+ if (port->type == HSR_PT_SLAVE_A)
+ path_id = 0;
+ else
+ path_id = 1;
+
+ set_hsr_tag_path(&hsr_ethhdr->hsr_tag, path_id);
+}
+
static struct sk_buff *hsr_fill_tag(struct sk_buff *skb,
struct hsr_frame_info *frame,
struct hsr_port *port, u8 proto_version)
{
struct hsr_ethhdr *hsr_ethhdr;
- int lane_id;
int lsdu_size;
/* pad to minimum packet size which is 60 + 6 (HSR tag) */
if (skb_put_padto(skb, ETH_ZLEN + HSR_HLEN))
return NULL;
- if (port->type == HSR_PT_SLAVE_A)
- lane_id = 0;
- else
- lane_id = 1;
-
lsdu_size = skb->len - 14;
if (frame->is_vlan)
lsdu_size -= 4;
hsr_ethhdr = (struct hsr_ethhdr *)skb_mac_header(skb);
- set_hsr_tag_path(&hsr_ethhdr->hsr_tag, lane_id);
+ hsr_set_path_id(hsr_ethhdr, port);
set_hsr_tag_LSDU_size(&hsr_ethhdr->hsr_tag, lsdu_size);
hsr_ethhdr->hsr_tag.sequence_nr = htons(frame->sequence_nr);
hsr_ethhdr->hsr_tag.encap_proto = hsr_ethhdr->ethhdr.h_proto;
return skb;
}
-static struct sk_buff *create_tagged_skb(struct sk_buff *skb_o,
- struct hsr_frame_info *frame,
- struct hsr_port *port)
+/* If the original frame was an HSR tagged frame, just clone it to be sent
+ * unchanged. Otherwise, create a private frame especially tagged for 'port'.
+ */
+struct sk_buff *hsr_create_tagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port)
{
- int movelen;
unsigned char *dst, *src;
struct sk_buff *skb;
+ int movelen;
+
+ if (frame->skb_hsr) {
+ struct hsr_ethhdr *hsr_ethhdr =
+ (struct hsr_ethhdr *)skb_mac_header(frame->skb_hsr);
+
+ /* set the lane id properly */
+ hsr_set_path_id(hsr_ethhdr, port);
+ return skb_clone(frame->skb_hsr, GFP_ATOMIC);
+ }
/* Create the new skb with enough headroom to fit the HSR tag */
- skb = __pskb_copy(skb_o, skb_headroom(skb_o) + HSR_HLEN, GFP_ATOMIC);
+ skb = __pskb_copy(frame->skb_std,
+ skb_headroom(frame->skb_std) + HSR_HLEN, GFP_ATOMIC);
if (!skb)
return NULL;
skb_reset_mac_header(skb);
return hsr_fill_tag(skb, frame, port, port->hsr->prot_version);
}
-/* If the original frame was an HSR tagged frame, just clone it to be sent
- * unchanged. Otherwise, create a private frame especially tagged for 'port'.
- */
-static struct sk_buff *frame_get_tagged_skb(struct hsr_frame_info *frame,
- struct hsr_port *port)
+struct sk_buff *prp_create_tagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port)
{
- if (frame->skb_hsr)
- return skb_clone(frame->skb_hsr, GFP_ATOMIC);
+ struct sk_buff *skb;
- if (port->type != HSR_PT_SLAVE_A && port->type != HSR_PT_SLAVE_B) {
- WARN_ONCE(1, "HSR: Bug: trying to create a tagged frame for a non-ring port");
- return NULL;
+ if (frame->skb_prp) {
+ struct prp_rct *trailer = skb_get_PRP_rct(frame->skb_prp);
+
+ if (trailer) {
+ prp_set_lan_id(trailer, port);
+ } else {
+ WARN_ONCE(!trailer, "errored PRP skb");
+ return NULL;
+ }
+ return skb_clone(frame->skb_prp, GFP_ATOMIC);
}
- return create_tagged_skb(frame->skb_std, frame, port);
+ skb = skb_copy_expand(frame->skb_std, 0,
+ skb_tailroom(frame->skb_std) + HSR_HLEN,
+ GFP_ATOMIC);
+ prp_fill_rct(skb, frame, port);
+
+ return skb;
}
static void hsr_deliver_master(struct sk_buff *skb, struct net_device *dev,
return dev_queue_xmit(skb);
}
+bool prp_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port)
+{
+ return ((frame->port_rcv->type == HSR_PT_SLAVE_A &&
+ port->type == HSR_PT_SLAVE_B) ||
+ (frame->port_rcv->type == HSR_PT_SLAVE_B &&
+ port->type == HSR_PT_SLAVE_A));
+}
+
/* Forward the frame through all devices except:
* - Back through the receiving device
* - If it's a HSR frame: through a device where it has passed before
+ * - if it's a PRP frame: through another PRP slave device (no bridge)
* - To the local HSR master only if the frame is directly addressed to it, or
* a non-supervision multicast or broadcast frame.
*
struct sk_buff *skb;
hsr_for_each_port(frame->port_rcv->hsr, port) {
+ struct hsr_priv *hsr = port->hsr;
/* Don't send frame back the way it came */
if (port == frame->port_rcv)
continue;
if (port->type != HSR_PT_MASTER && frame->is_local_exclusive)
continue;
- /* Don't send frame over port where it has been sent before */
- if (hsr_register_frame_out(port, frame->node_src,
+ /* Don't send frame over port where it has been sent before.
+ * Also fro SAN, this shouldn't be done.
+ */
+ if (!frame->is_from_san &&
+ hsr_register_frame_out(port, frame->node_src,
frame->sequence_nr))
continue;
if (frame->is_supervision && port->type == HSR_PT_MASTER) {
- hsr_handle_sup_frame(frame->skb_hsr,
- frame->node_src,
- frame->port_rcv);
+ hsr_handle_sup_frame(frame);
continue;
}
+ /* Check if frame is to be dropped. Eg. for PRP no forward
+ * between ports.
+ */
+ if (hsr->proto_ops->drop_frame &&
+ hsr->proto_ops->drop_frame(frame, port))
+ continue;
+
if (port->type != HSR_PT_MASTER)
- skb = frame_get_tagged_skb(frame, port);
+ skb = hsr->proto_ops->create_tagged_frame(frame, port);
else
- skb = frame_get_stripped_skb(frame, port);
+ skb = hsr->proto_ops->get_untagged_frame(frame, port);
+
if (!skb) {
- /* FIXME: Record the dropped frame? */
+ frame->port_rcv->dev->stats.rx_dropped++;
continue;
}
}
}
-static int hsr_fill_frame_info(struct hsr_frame_info *frame,
- struct sk_buff *skb, struct hsr_port *port)
+static void handle_std_frame(struct sk_buff *skb,
+ struct hsr_frame_info *frame)
{
- struct ethhdr *ethhdr;
+ struct hsr_port *port = frame->port_rcv;
+ struct hsr_priv *hsr = port->hsr;
unsigned long irqflags;
+ frame->skb_hsr = NULL;
+ frame->skb_prp = NULL;
+ frame->skb_std = skb;
+
+ if (port->type != HSR_PT_MASTER) {
+ frame->is_from_san = true;
+ } else {
+ /* Sequence nr for the master node */
+ spin_lock_irqsave(&hsr->seqnr_lock, irqflags);
+ frame->sequence_nr = hsr->sequence_nr;
+ hsr->sequence_nr++;
+ spin_unlock_irqrestore(&hsr->seqnr_lock, irqflags);
+ }
+}
+
+void hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
+ struct hsr_frame_info *frame)
+{
+ if (proto == htons(ETH_P_PRP) ||
+ proto == htons(ETH_P_HSR)) {
+ /* HSR tagged frame :- Data or Supervision */
+ frame->skb_std = NULL;
+ frame->skb_prp = NULL;
+ frame->skb_hsr = skb;
+ frame->sequence_nr = hsr_get_skb_sequence_nr(skb);
+ return;
+ }
+
+ /* Standard frame or PRP from master port */
+ handle_std_frame(skb, frame);
+}
+
+void prp_fill_frame_info(__be16 proto, struct sk_buff *skb,
+ struct hsr_frame_info *frame)
+{
+ /* Supervision frame */
+ struct prp_rct *rct = skb_get_PRP_rct(skb);
+
+ if (rct &&
+ prp_check_lsdu_size(skb, rct, frame->is_supervision)) {
+ frame->skb_hsr = NULL;
+ frame->skb_std = NULL;
+ frame->skb_prp = skb;
+ frame->sequence_nr = prp_get_skb_sequence_nr(rct);
+ return;
+ }
+ handle_std_frame(skb, frame);
+}
+
+static int fill_frame_info(struct hsr_frame_info *frame,
+ struct sk_buff *skb, struct hsr_port *port)
+{
+ struct hsr_priv *hsr = port->hsr;
+ struct hsr_vlan_ethhdr *vlan_hdr;
+ struct ethhdr *ethhdr;
+ __be16 proto;
+
+ memset(frame, 0, sizeof(*frame));
frame->is_supervision = is_supervision_frame(port->hsr, skb);
- frame->node_src = hsr_get_node(port, skb, frame->is_supervision);
+ frame->node_src = hsr_get_node(port, &hsr->node_db, skb,
+ frame->is_supervision,
+ port->type);
if (!frame->node_src)
return -1; /* Unknown node and !is_supervision, or no mem */
ethhdr = (struct ethhdr *)skb_mac_header(skb);
frame->is_vlan = false;
- if (ethhdr->h_proto == htons(ETH_P_8021Q)) {
+ proto = ethhdr->h_proto;
+
+ if (proto == htons(ETH_P_8021Q))
frame->is_vlan = true;
+
+ if (frame->is_vlan) {
+ vlan_hdr = (struct hsr_vlan_ethhdr *)ethhdr;
+ proto = vlan_hdr->vlanhdr.h_vlan_encapsulated_proto;
/* FIXME: */
netdev_warn_once(skb->dev, "VLAN not yet supported");
}
- if (ethhdr->h_proto == htons(ETH_P_PRP) ||
- ethhdr->h_proto == htons(ETH_P_HSR)) {
- frame->skb_std = NULL;
- frame->skb_hsr = skb;
- frame->sequence_nr = hsr_get_skb_sequence_nr(skb);
- } else {
- frame->skb_std = skb;
- frame->skb_hsr = NULL;
- /* Sequence nr for the master node */
- spin_lock_irqsave(&port->hsr->seqnr_lock, irqflags);
- frame->sequence_nr = port->hsr->sequence_nr;
- port->hsr->sequence_nr++;
- spin_unlock_irqrestore(&port->hsr->seqnr_lock, irqflags);
- }
+ frame->is_from_san = false;
frame->port_rcv = port;
+ hsr->proto_ops->fill_frame_info(proto, skb, frame);
check_local_dest(port->hsr, skb, frame);
return 0;
goto out_drop;
}
- if (hsr_fill_frame_info(&frame, skb, port) < 0)
+ if (fill_frame_info(&frame, skb, port) < 0)
goto out_drop;
+
hsr_register_frame_in(frame.node_src, port, frame.sequence_nr);
hsr_forward_do(&frame);
/* Gets called for ingress frames as well as egress from master port.
port->dev->stats.tx_bytes += skb->len;
}
- if (frame.skb_hsr)
- kfree_skb(frame.skb_hsr);
- if (frame.skb_std)
- kfree_skb(frame.skb_std);
+ kfree_skb(frame.skb_hsr);
+ kfree_skb(frame.skb_prp);
+ kfree_skb(frame.skb_std);
return;
out_drop:
projects / linux-2.6-microblaze.git / blobdiff