From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/net/strparser/strparser.c | 41 +++++++++++------------------------------
1 files changed, 11 insertions(+), 30 deletions(-)
diff --git a/kernel/net/strparser/strparser.c b/kernel/net/strparser/strparser.c
index 0f4e427..cd9954c 100644
--- a/kernel/net/strparser/strparser.c
+++ b/kernel/net/strparser/strparser.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Stream Parser
*
* Copyright (c) 2016 Tom Herbert <tom@herbertland.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
*/
#include <linux/bpf.h>
@@ -14,7 +11,8 @@
#include <linux/file.h>
#include <linux/in.h>
#include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/init.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/poll.h>
@@ -29,18 +27,10 @@
static struct workqueue_struct *strp_wq;
-struct _strp_msg {
- /* Internal cb structure. struct strp_msg must be first for passing
- * to upper layer.
- */
- struct strp_msg strp;
- int accum_len;
-};
-
static inline struct _strp_msg *_strp_msg(struct sk_buff *skb)
{
return (struct _strp_msg *)((void *)skb->cb +
- offsetof(struct qdisc_skb_cb, data));
+ offsetof(struct sk_skb_cb, strp));
}
/* Lower lock held */
@@ -159,18 +149,14 @@
return 0;
}
- skb = alloc_skb(0, GFP_ATOMIC);
+ skb = alloc_skb_for_msg(head);
if (!skb) {
STRP_STATS_INCR(strp->stats.mem_fail);
desc->error = -ENOMEM;
return 0;
}
- skb->len = head->len;
- skb->data_len = head->len;
- skb->truesize = head->truesize;
- *_strp_msg(skb) = *_strp_msg(head);
+
strp->skb_nextp = &head->next;
- skb_shinfo(skb)->frag_list = head;
strp->skb_head = skb;
head = skb;
} else {
@@ -297,7 +283,7 @@
break;
}
- /* Positive extra indicates ore bytes than needed for the
+ /* Positive extra indicates more bytes than needed for the
* message
*/
@@ -545,17 +531,12 @@
}
EXPORT_SYMBOL_GPL(strp_check_rcv);
-static int __init strp_mod_init(void)
+static int __init strp_dev_init(void)
{
strp_wq = create_singlethread_workqueue("kstrp");
+ if (unlikely(!strp_wq))
+ return -ENOMEM;
return 0;
}
-
-static void __exit strp_mod_exit(void)
-{
- destroy_workqueue(strp_wq);
-}
-module_init(strp_mod_init);
-module_exit(strp_mod_exit);
-MODULE_LICENSE("GPL");
+device_initcall(strp_dev_init);
--
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