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/sched/sch_fq_codel.c
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@@ -1,10 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Fair Queue CoDel discipline
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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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  *  Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
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  */
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@@ -18,7 +14,6 @@
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 #include <linux/errno.h>
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 #include <linux/init.h>
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 #include <linux/skbuff.h>
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-#include <linux/jhash.h>
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 #include <linux/slab.h>
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 #include <linux/vmalloc.h>
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 #include <net/netlink.h>
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@@ -49,7 +44,6 @@
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 	struct sk_buff	  *tail;
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 	struct list_head  flowchain;
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 	int		  deficit;
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-	u32		  dropped; /* number of drops (or ECN marks) on this flow */
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 	struct codel_vars cvars;
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 }; /* please try to keep this structure <= 64 bytes */
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@@ -105,7 +99,7 @@
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 		case TC_ACT_QUEUED:
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 		case TC_ACT_TRAP:
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 			*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
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-			/* fall through */
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+			fallthrough;
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 		case TC_ACT_SHOT:
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 			return 0;
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 		}
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@@ -124,7 +118,7 @@
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 	struct sk_buff *skb = flow->head;
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 	flow->head = skb->next;
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-	skb->next = NULL;
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+	skb_mark_not_on_list(skb);
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 	return skb;
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 }
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@@ -177,7 +171,8 @@
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 		__qdisc_drop(skb, to_free);
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 	} while (++i < max_packets && len < threshold);
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173
 
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-	flow->dropped += i;
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+	/* Tell codel to increase its signal strength also */
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+	flow->cvars.count += i;
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 	q->backlogs[idx] -= len;
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 	q->memory_usage -= mem;
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 	sch->qstats.drops += i;
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@@ -192,7 +187,7 @@
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 	struct fq_codel_sched_data *q = qdisc_priv(sch);
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 	unsigned int idx, prev_backlog, prev_qlen;
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 	struct fq_codel_flow *flow;
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-	int uninitialized_var(ret);
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+	int ret;
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 	unsigned int pkt_len;
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 	bool memory_limited;
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193
 
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@@ -215,7 +210,6 @@
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 		list_add_tail(&flow->flowchain, &q->new_flows);
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 		q->new_flow_count++;
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 		flow->deficit = q->quantum;
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-		flow->dropped = 0;
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 	}
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 	get_codel_cb(skb)->mem_usage = skb->truesize;
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 	q->memory_usage += get_codel_cb(skb)->mem_usage;
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@@ -290,7 +284,6 @@
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 	struct sk_buff *skb;
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 	struct fq_codel_flow *flow;
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 	struct list_head *head;
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-	u32 prev_drop_count, prev_ecn_mark;
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 begin:
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 	head = &q->new_flows;
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@@ -307,15 +300,9 @@
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 		goto begin;
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 	}
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-	prev_drop_count = q->cstats.drop_count;
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-	prev_ecn_mark = q->cstats.ecn_mark;
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-
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 	skb = codel_dequeue(sch, &sch->qstats.backlog, &q->cparams,
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 			    &flow->cvars, &q->cstats, qdisc_pkt_len,
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 			    codel_get_enqueue_time, drop_func, dequeue_func);
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-
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-	flow->dropped += q->cstats.drop_count - prev_drop_count;
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-	flow->dropped += q->cstats.ecn_mark - prev_ecn_mark;
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 	if (!skb) {
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 		/* force a pass through old_flows to prevent starvation */
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@@ -360,8 +347,6 @@
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 		codel_vars_init(&flow->cvars);
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 	}
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 	memset(q->backlogs, 0, q->flows_cnt * sizeof(u32));
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-	sch->q.qlen = 0;
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-	sch->qstats.backlog = 0;
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 	q->memory_usage = 0;
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 }
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@@ -388,8 +373,8 @@
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 	if (!opt)
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 		return -EINVAL;
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-	err = nla_parse_nested(tb, TCA_FQ_CODEL_MAX, opt, fq_codel_policy,
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-			       NULL);
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+	err = nla_parse_nested_deprecated(tb, TCA_FQ_CODEL_MAX, opt,
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+					  fq_codel_policy, NULL);
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 	if (err < 0)
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 		return err;
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 	if (tb[TCA_FQ_CODEL_FLOWS]) {
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@@ -535,7 +520,7 @@
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 	struct fq_codel_sched_data *q = qdisc_priv(sch);
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 	struct nlattr *opts;
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-	opts = nla_nest_start(skb, TCA_OPTIONS);
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+	opts = nla_nest_start_noflag(skb, TCA_OPTIONS);
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 	if (opts == NULL)
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 		goto nla_put_failure;
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@@ -670,7 +655,7 @@
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 			sch_tree_unlock(sch);
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 		}
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 		qs.backlog = q->backlogs[idx];
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-		qs.drops = flow->dropped;
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+		qs.drops = 0;
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 	}
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 	if (gnet_stats_copy_queue(d, NULL, &qs, qs.qlen) < 0)
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 		return -1;
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@@ -742,3 +727,4 @@
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 module_exit(fq_codel_module_exit)
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 MODULE_AUTHOR("Eric Dumazet");
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 MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("Fair Queue CoDel discipline");