修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/net/rxrpc/skbuff.c
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@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* ar-skbuff.c: socket buffer destruction handling
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  *
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  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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  * Written by David Howells (dhowells@redhat.com)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -18,7 +14,8 @@
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 #include <net/af_rxrpc.h>
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 #include "ar-internal.h"
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-#define select_skb_count(op) (op >= rxrpc_skb_tx_cleaned ? &rxrpc_n_tx_skbs : &rxrpc_n_rx_skbs)
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+#define is_tx_skb(skb) (rxrpc_skb(skb)->rx_flags & RXRPC_SKB_TX_BUFFER)
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+#define select_skb_count(skb) (is_tx_skb(skb) ? &rxrpc_n_tx_skbs : &rxrpc_n_rx_skbs)
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 /*
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  * Note the allocation or reception of a socket buffer.
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@@ -26,8 +23,9 @@
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 void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
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 {
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 	const void *here = __builtin_return_address(0);
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-	int n = atomic_inc_return(select_skb_count(op));
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-	trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
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+	int n = atomic_inc_return(select_skb_count(skb));
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+	trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
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+			rxrpc_skb(skb)->rx_flags, here);
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 }
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 /*
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@@ -37,8 +35,9 @@
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 {
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 	const void *here = __builtin_return_address(0);
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 	if (skb) {
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-		int n = atomic_read(select_skb_count(op));
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-		trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
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+		int n = atomic_read(select_skb_count(skb));
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+		trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
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+				rxrpc_skb(skb)->rx_flags, here);
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 	}
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 }
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@@ -48,9 +47,20 @@
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 void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
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 {
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 	const void *here = __builtin_return_address(0);
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-	int n = atomic_inc_return(select_skb_count(op));
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-	trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
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+	int n = atomic_inc_return(select_skb_count(skb));
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+	trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
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+			rxrpc_skb(skb)->rx_flags, here);
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 	skb_get(skb);
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+}
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+
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+/*
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+ * Note the dropping of a ref on a socket buffer by the core.
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+ */
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+void rxrpc_eaten_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
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+{
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+	const void *here = __builtin_return_address(0);
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+	int n = atomic_inc_return(&rxrpc_n_rx_skbs);
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+	trace_rxrpc_skb(skb, op, 0, n, 0, here);
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 }
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 /*
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@@ -61,24 +71,9 @@
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 	const void *here = __builtin_return_address(0);
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 	if (skb) {
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 		int n;
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-		CHECK_SLAB_OKAY(&skb->users);
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-		n = atomic_dec_return(select_skb_count(op));
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-		trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
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-		kfree_skb(skb);
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-	}
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-}
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-
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-/*
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- * Note the injected loss of a socket buffer.
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- */
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-void rxrpc_lose_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
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-{
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-	const void *here = __builtin_return_address(0);
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-	if (skb) {
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-		int n;
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-		CHECK_SLAB_OKAY(&skb->users);
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-		n = atomic_dec_return(select_skb_count(op));
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-		trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
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+		n = atomic_dec_return(select_skb_count(skb));
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+		trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
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+				rxrpc_skb(skb)->rx_flags, here);
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 		kfree_skb(skb);
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 	}
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 }
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@@ -91,9 +86,10 @@
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 	const void *here = __builtin_return_address(0);
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 	struct sk_buff *skb;
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 	while ((skb = skb_dequeue((list))) != NULL) {
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-		int n = atomic_dec_return(select_skb_count(rxrpc_skb_rx_purged));
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-		trace_rxrpc_skb(skb, rxrpc_skb_rx_purged,
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-				refcount_read(&skb->users), n, here);
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+		int n = atomic_dec_return(select_skb_count(skb));
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+		trace_rxrpc_skb(skb, rxrpc_skb_purged,
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+				refcount_read(&skb->users), n,
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+				rxrpc_skb(skb)->rx_flags, here);
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 		kfree_skb(skb);
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 	}
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 }