rx interception to remove padding and adjust copied_seq

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks.c

@@ -37,6 +37,8 @@
 struct ptcp_hook_heads ptcp_hook_heads = {
   .print_sock_skb = LIST_HEAD_INIT(ptcp_hook_heads.print_sock_skb),
   .handle_tcp_urg = LIST_HEAD_INIT(ptcp_hook_heads.handle_tcp_urg),
+  .rx_adjust_skb_size = LIST_HEAD_INIT(ptcp_hook_heads.rx_adjust_skb_size),
+  .rx_adjust_copied_seq = LIST_HEAD_INIT(ptcp_hook_heads.rx_adjust_copied_seq),
   .tx_adjust_skb_size = LIST_HEAD_INIT(ptcp_hook_heads.tx_adjust_skb_size),
   .tx_adjust_urg = LIST_HEAD_INIT(ptcp_hook_heads.tx_adjust_urg),
   .tx_adjust_iphdr = LIST_HEAD_INIT(ptcp_hook_heads.tx_adjust_iphdr),
@@ -54,6 +56,20 @@ int ptcp_handle_tcp_urg(struct sock *sk, struct sk_buff *skb, struct tcphdr *th)
 }
 EXPORT_SYMBOL(ptcp_handle_tcp_urg);
 
+int ptcp_rx_adjust_skb_size(struct sock *sk, struct sk_buff *skb, int req_len,
+    int offset, int chunk, int copied, int flags)
+{
+  return call_ptcp_int_hook(rx_adjust_skb_size, -1, sk, skb, req_len, offset, chunk,
+      copied, flags);
+}
+EXPORT_SYMBOL(ptcp_rx_adjust_skb_size);
+
+int ptcp_rx_adjust_copied_seq(struct sock *sk, struct sk_buff *skb, int old_skb_len)
+{
+  return call_ptcp_int_hook(rx_adjust_copied_seq, -1, sk, skb, old_skb_len);
+}
+EXPORT_SYMBOL(ptcp_rx_adjust_copied_seq);
+
 int ptcp_tx_adjust_skb_size(struct sock *sk, int size, gfp_t gfp,
     bool force_schedule)
 {

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks.h

@@ -17,6 +17,10 @@
 
 void ptcp_print_sock_skb(struct sock *sk, struct sk_buff *skb);
 int ptcp_handle_tcp_urg(struct sock *sk, struct sk_buff *skb, struct tcphdr *th);
+int ptcp_rx_adjust_skb_size(struct sock *sk, struct sk_buff *skb, int req_len,
+    int offset, int chunk, int copied, int flags);
+int ptcp_rx_adjust_copied_seq(struct sock *sk, struct sk_buff *skb, int old_skb_len);
+
 int ptcp_tx_adjust_skb_size(struct sock *sk, int size, gfp_t gfp,
     bool force_schedule);
 int ptcp_tx_adjust_urg(struct sock *sk, struct sk_buff *skb);

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks_impl.c

@@ -36,6 +36,35 @@ ptcp_impl_handle_tcp_urg(struct sock *sk, struct sk_buff *skb, struct tcphdr *th
   return -1;
 }
 
+int (*lnk_rx_adjust_skb_size) (struct sock *sk, struct sk_buff *skb, int req_len,
+    int offset, int chunk, int copied, int flags) = 0;
+EXPORT_SYMBOL(lnk_rx_adjust_skb_size);
+static int
+ptcp_impl_rx_adjust_skb_size(struct sock *sk, struct sk_buff *skb, int req_len,
+    int offset, int chunk, int copied, int flags)
+{
+  if (lnk_rx_adjust_skb_size) {
+    return lnk_rx_adjust_skb_size(sk, skb, req_len, offset, chunk,
+        copied, flags);
+  }
+
+  return -1;
+}
+
+int (*lnk_rx_adjust_copied_seq) (struct sock *sk, struct sk_buff *skb,
+    int old_skb_len) = 0;
+EXPORT_SYMBOL(lnk_rx_adjust_copied_seq);
+static int
+ptcp_impl_rx_adjust_copied_seq (struct sock *sk, struct sk_buff *skb,
+    int old_skb_len)
+{
+  if (lnk_rx_adjust_copied_seq) {
+    return lnk_rx_adjust_copied_seq(sk, skb, old_skb_len);
+  }
+
+  return -1;
+}
+
 int (*lnk_tx_adjust_skb_size) (struct sock *sk, int size, gfp_t gfp,
     bool force_schedule) = 0;
 EXPORT_SYMBOL(lnk_tx_adjust_skb_size);
@@ -77,6 +106,8 @@ ptcp_impl_tx_adjust_iphdr(struct sock *sk, struct sk_buff *skb)
 struct ptcp_hook_list ptcp_hooks[NUM_PTCP_HOOKS] = {
   PTCP_HOOK_INIT(print_sock_skb, ptcp_impl_print_sock_skb),
   PTCP_HOOK_INIT(handle_tcp_urg, ptcp_impl_handle_tcp_urg),
+  PTCP_HOOK_INIT(rx_adjust_skb_size, ptcp_impl_rx_adjust_skb_size),
+  PTCP_HOOK_INIT(rx_adjust_copied_seq, ptcp_impl_rx_adjust_copied_seq),
   PTCP_HOOK_INIT(tx_adjust_skb_size, ptcp_impl_tx_adjust_skb_size),
   PTCP_HOOK_INIT(tx_adjust_urg, ptcp_impl_tx_adjust_urg),
   PTCP_HOOK_INIT(tx_adjust_iphdr, ptcp_impl_tx_adjust_iphdr),

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks_impl.h

@@ -26,6 +26,9 @@
 union ptcp_list_options {
   void (*print_sock_skb) (struct sock *sk, struct sk_buff *skb);
   int (*handle_tcp_urg) (struct sock *sk, struct sk_buff *skb, struct tcphdr *th);
+  int (*rx_adjust_skb_size) (struct sock *sk, struct sk_buff *skb, int req_len,
+      int offset, int chunk, int copied, int flags);
+  int (*rx_adjust_copied_seq) (struct sock *sk, struct sk_buff *skb, int old_skb_len);
   int (*tx_adjust_skb_size) (struct sock *sk, int size, gfp_t gfp,
       bool force_schedule);
   int (*tx_adjust_urg) (struct sock *sk, struct sk_buff *skb);
@@ -35,6 +38,8 @@ union ptcp_list_options {
 struct ptcp_hook_heads {
   struct list_head print_sock_skb;
   struct list_head handle_tcp_urg;
+  struct list_head rx_adjust_skb_size;
+  struct list_head rx_adjust_copied_seq;
   struct list_head tx_adjust_skb_size;
   struct list_head tx_adjust_urg;
   struct list_head tx_adjust_iphdr;
@@ -50,7 +55,7 @@ struct ptcp_hook_list {
 { .head = &ptcp_hook_heads.HEAD, .hook = { . HEAD = HOOK } }
 
 // increment this every time a new hook is added
-#define NUM_PTCP_HOOKS  5
+#define NUM_PTCP_HOOKS  7
 
 extern struct ptcp_hook_heads ptcp_hook_heads;
 extern struct ptcp_hook_list ptcp_hooks[NUM_PTCP_HOOKS];