Add callback for optional rx_preprocessor. This is needed to add DSA
switch support and demultiplex traffic received from different switch ports.
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
include/net.h | 3 +++
net/net.c | 11 +++++++++++
2 files changed, 14 insertions(+)
diff --git a/include/net.h b/include/net.h
index aad28e4f4c..ca9b6cd61e 100644
--- a/include/net.h
+++ b/include/net.h
@@ -44,9 +44,12 @@ struct eth_device {
void (*halt) (struct eth_device*);
int (*get_ethaddr) (struct eth_device*, u8 adr[6]);
int (*set_ethaddr) (struct eth_device*, const unsigned char *adr);
+ int (*rx_preprocessor) (struct eth_device*, unsigned char **packet,
+ int *length);
struct eth_device *next;
void *priv;
+ void *rx_preprocessor_priv;
/* phy device may attach itself for hardware timestamping */
struct phy_device *phydev;
diff --git a/net/net.c b/net/net.c
index fdb9ab826c..0b8e4caa0e 100644
--- a/net/net.c
+++ b/net/net.c
@@ -708,6 +708,17 @@ int net_receive(struct eth_device *edev, unsigned char *pkt, int len)
goto out;
}
+ if (edev->rx_preprocessor) {
+ ret = edev->rx_preprocessor(edev, &pkt, &len);
+ if (ret == -ENOMSG)
+ return 0;
+ if (ret) {
+ pr_debug("%s: rx_preprocessor failed %pe\n", __func__,
+ ERR_PTR(ret));
+ return ret;
+ }
+ }
+
switch (et_protlen) {
case PROT_ARP:
ret = net_handle_arp(edev, pkt, len);
--
2.30.2
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