Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 2016 Qualcomm Atheros, Inc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Based on net/sched/sch_fq_codel.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #ifndef __NET_SCHED_FQ_IMPL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define __NET_SCHED_FQ_IMPL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <net/fq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) /* functions that are embedded into includer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) static void fq_adjust_removal(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 			      struct fq_flow *flow,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 			      struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	struct fq_tin *tin = flow->tin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	tin->backlog_bytes -= skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	tin->backlog_packets--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	flow->backlog -= skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	fq->backlog--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	fq->memory_usage -= skb->truesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static void fq_rejigger_backlog(struct fq *fq, struct fq_flow *flow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct fq_flow *i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (flow->backlog == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		list_del_init(&flow->backlogchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		i = flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		list_for_each_entry_continue(i, &fq->backlogs, backlogchain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 			if (i->backlog < flow->backlog)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		list_move_tail(&flow->backlogchain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 			       &i->backlogchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static struct sk_buff *fq_flow_dequeue(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 				       struct fq_flow *flow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	lockdep_assert_held(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	skb = __skb_dequeue(&flow->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	fq_adjust_removal(fq, flow, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	fq_rejigger_backlog(fq, flow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static struct sk_buff *fq_tin_dequeue(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 				      struct fq_tin *tin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 				      fq_tin_dequeue_t dequeue_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct fq_flow *flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct list_head *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	lockdep_assert_held(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) begin:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	head = &tin->new_flows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	if (list_empty(head)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		head = &tin->old_flows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		if (list_empty(head))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	flow = list_first_entry(head, struct fq_flow, flowchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (flow->deficit <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		flow->deficit += fq->quantum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		list_move_tail(&flow->flowchain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			       &tin->old_flows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		goto begin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	skb = dequeue_func(fq, tin, flow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		/* force a pass through old_flows to prevent starvation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		if ((head == &tin->new_flows) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		    !list_empty(&tin->old_flows)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			list_move_tail(&flow->flowchain, &tin->old_flows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			list_del_init(&flow->flowchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			flow->tin = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		goto begin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	flow->deficit -= skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	tin->tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	tin->tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	u32 hash = skb_get_hash(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	return reciprocal_scale(hash, fq->flows_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static struct fq_flow *fq_flow_classify(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 					struct fq_tin *tin, u32 idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 					struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 					fq_flow_get_default_t get_default_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	struct fq_flow *flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	lockdep_assert_held(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	flow = &fq->flows[idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (flow->tin && flow->tin != tin) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		flow = get_default_func(fq, tin, idx, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		tin->collisions++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		fq->collisions++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (!flow->tin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		tin->flows++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	return flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static void fq_recalc_backlog(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			      struct fq_tin *tin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			      struct fq_flow *flow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	struct fq_flow *i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (list_empty(&flow->backlogchain))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		list_add_tail(&flow->backlogchain, &fq->backlogs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	i = flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	list_for_each_entry_continue_reverse(i, &fq->backlogs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 					     backlogchain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		if (i->backlog > flow->backlog)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	list_move(&flow->backlogchain, &i->backlogchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static void fq_tin_enqueue(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			   struct fq_tin *tin, u32 idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			   struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			   fq_skb_free_t free_func,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			   fq_flow_get_default_t get_default_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct fq_flow *flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	bool oom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	lockdep_assert_held(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	flow = fq_flow_classify(fq, tin, idx, skb, get_default_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	flow->tin = tin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	flow->backlog += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	tin->backlog_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	tin->backlog_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	fq->memory_usage += skb->truesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	fq->backlog++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	fq_recalc_backlog(fq, tin, flow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (list_empty(&flow->flowchain)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		flow->deficit = fq->quantum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		list_add_tail(&flow->flowchain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			      &tin->new_flows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	__skb_queue_tail(&flow->queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	oom = (fq->memory_usage > fq->memory_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	while (fq->backlog > fq->limit || oom) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		flow = list_first_entry_or_null(&fq->backlogs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 						struct fq_flow,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 						backlogchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		if (!flow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		skb = fq_flow_dequeue(fq, flow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		free_func(fq, flow->tin, flow, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		flow->tin->overlimit++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		fq->overlimit++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		if (oom) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			fq->overmemory++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			oom = (fq->memory_usage > fq->memory_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static void fq_flow_filter(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			   struct fq_flow *flow,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			   fq_skb_filter_t filter_func,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			   void *filter_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 			   fq_skb_free_t free_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct fq_tin *tin = flow->tin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	struct sk_buff *skb, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	lockdep_assert_held(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	skb_queue_walk_safe(&flow->queue, skb, tmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		if (!filter_func(fq, tin, flow, skb, filter_data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		__skb_unlink(skb, &flow->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		fq_adjust_removal(fq, flow, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		free_func(fq, tin, flow, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	fq_rejigger_backlog(fq, flow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static void fq_tin_filter(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			  struct fq_tin *tin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			  fq_skb_filter_t filter_func,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 			  void *filter_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			  fq_skb_free_t free_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct fq_flow *flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	lockdep_assert_held(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	list_for_each_entry(flow, &tin->new_flows, flowchain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		fq_flow_filter(fq, flow, filter_func, filter_data, free_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	list_for_each_entry(flow, &tin->old_flows, flowchain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		fq_flow_filter(fq, flow, filter_func, filter_data, free_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static void fq_flow_reset(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 			  struct fq_flow *flow,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			  fq_skb_free_t free_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	while ((skb = fq_flow_dequeue(fq, flow)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		free_func(fq, flow->tin, flow, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (!list_empty(&flow->flowchain))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		list_del_init(&flow->flowchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (!list_empty(&flow->backlogchain))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		list_del_init(&flow->backlogchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	flow->tin = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	WARN_ON_ONCE(flow->backlog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static void fq_tin_reset(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 			 struct fq_tin *tin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			 fq_skb_free_t free_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	struct list_head *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	struct fq_flow *flow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		head = &tin->new_flows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		if (list_empty(head)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			head = &tin->old_flows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			if (list_empty(head))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		flow = list_first_entry(head, struct fq_flow, flowchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		fq_flow_reset(fq, flow, free_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	WARN_ON_ONCE(tin->backlog_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	WARN_ON_ONCE(tin->backlog_packets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static void fq_flow_init(struct fq_flow *flow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	INIT_LIST_HEAD(&flow->flowchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	INIT_LIST_HEAD(&flow->backlogchain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	__skb_queue_head_init(&flow->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static void fq_tin_init(struct fq_tin *tin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	INIT_LIST_HEAD(&tin->new_flows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	INIT_LIST_HEAD(&tin->old_flows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static int fq_init(struct fq *fq, int flows_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	memset(fq, 0, sizeof(fq[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	INIT_LIST_HEAD(&fq->backlogs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	spin_lock_init(&fq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	fq->flows_cnt = max_t(u32, flows_cnt, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	fq->quantum = 300;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	fq->limit = 8192;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	fq->memory_limit = 16 << 20; /* 16 MBytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	fq->flows = kvcalloc(fq->flows_cnt, sizeof(fq->flows[0]), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	if (!fq->flows)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	for (i = 0; i < fq->flows_cnt; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		fq_flow_init(&fq->flows[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static void fq_reset(struct fq *fq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		     fq_skb_free_t free_func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	for (i = 0; i < fq->flows_cnt; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		fq_flow_reset(fq, &fq->flows[i], free_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	kvfree(fq->flows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	fq->flows = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) #endif