package/kernel/mac80211/patches/subsys/311-net-fq_impl-drop-get_default_func-move-default-flow-.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 25 Nov 2020 18:09:10 +0100
   3 Subject: [PATCH] net/fq_impl: drop get_default_func, move default flow to
   4  fq_tin
   5
   6 Simplifies the code and prepares for a rework of scanning for flows on
   7 overmemory drop.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/include/net/fq.h
  13 +++ b/include/net/fq.h
  14 @@ -47,6 +47,7 @@ struct fq_flow {
  15  struct fq_tin {
  16         struct list_head new_flows;
  17         struct list_head old_flows;
  18 +       struct fq_flow default_flow;
  19         u32 backlog_bytes;
  20         u32 backlog_packets;
  21         u32 overlimit;
  22 --- a/include/net/fq_impl.h
  23 +++ b/include/net/fq_impl.h
  24 @@ -151,8 +151,7 @@ static u32 fq_flow_idx(struct fq *fq, st
  25
  26  static struct fq_flow *fq_flow_classify(struct fq *fq,
  27                                         struct fq_tin *tin, u32 idx,
  28 -                                       struct sk_buff *skb,
  29 -                                       fq_flow_get_default_t get_default_func)
  30 +                                       struct sk_buff *skb)
  31  {
  32         struct fq_flow *flow;
  33
  34 @@ -160,7 +159,7 @@ static struct fq_flow *fq_flow_classify(
  35
  36         flow = &fq->flows[idx];
  37         if (flow->tin && flow->tin != tin) {
  38 -               flow = get_default_func(fq, tin, idx, skb);
  39 +               flow = &tin->default_flow;
  40                 tin->collisions++;
  41                 fq->collisions++;
  42         }
  43 @@ -192,15 +191,14 @@ static void fq_recalc_backlog(struct fq
  44  static void fq_tin_enqueue(struct fq *fq,
  45                            struct fq_tin *tin, u32 idx,
  46                            struct sk_buff *skb,
  47 -                          fq_skb_free_t free_func,
  48 -                          fq_flow_get_default_t get_default_func)
  49 +                          fq_skb_free_t free_func)
  50  {
  51         struct fq_flow *flow;
  52         bool oom;
  53
  54         lockdep_assert_held(&fq->lock);
  55
  56 -       flow = fq_flow_classify(fq, tin, idx, skb, get_default_func);
  57 +       flow = fq_flow_classify(fq, tin, idx, skb);
  58
  59         flow->tin = tin;
  60         flow->backlog += skb->len;
  61 @@ -331,6 +329,7 @@ static void fq_tin_init(struct fq_tin *t
  62  {
  63         INIT_LIST_HEAD(&tin->new_flows);
  64         INIT_LIST_HEAD(&tin->old_flows);
  65 +       fq_flow_init(&tin->default_flow);
  66  }
  67
  68  static int fq_init(struct fq *fq, int flows_cnt)
  69 --- a/net/mac80211/ieee80211_i.h
  70 +++ b/net/mac80211/ieee80211_i.h
  71 @@ -857,7 +857,6 @@ enum txq_info_flags {
  72   */
  73  struct txq_info {
  74         struct fq_tin tin;
  75 -       struct fq_flow def_flow;
  76         struct codel_vars def_cvars;
  77         struct codel_stats cstats;
  78         struct sk_buff_head frags;
  79 --- a/net/mac80211/tx.c
  80 +++ b/net/mac80211/tx.c
  81 @@ -1322,7 +1322,7 @@ static struct sk_buff *codel_dequeue_fun
  82         fq = &local->fq;
  83
  84         if (cvars == &txqi->def_cvars)
  85 -               flow = &txqi->def_flow;
  86 +               flow = &txqi->tin.default_flow;
  87         else
  88                 flow = &fq->flows[cvars - local->cvars];
  89
  90 @@ -1365,7 +1365,7 @@ static struct sk_buff *fq_tin_dequeue_fu
  91                 cparams = &local->cparams;
  92         }
  93
  94 -       if (flow == &txqi->def_flow)
  95 +       if (flow == &tin->default_flow)
  96                 cvars = &txqi->def_cvars;
  97         else
  98                 cvars = &local->cvars[flow - fq->flows];
  99 @@ -1392,17 +1392,6 @@ static void fq_skb_free_func(struct fq *
 100         ieee80211_free_txskb(&local->hw, skb);
 101  }
 102
 103 -static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
 104 -                                               struct fq_tin *tin,
 105 -                                               int idx,
 106 -                                               struct sk_buff *skb)
 107 -{
 108 -       struct txq_info *txqi;
 109 -
 110 -       txqi = container_of(tin, struct txq_info, tin);
 111 -       return &txqi->def_flow;
 112 -}
 113 -
 114  static void ieee80211_txq_enqueue(struct ieee80211_local *local,
 115                                   struct txq_info *txqi,
 116                                   struct sk_buff *skb)
 117 @@ -1415,8 +1404,7 @@ static void ieee80211_txq_enqueue(struct
 118
 119         spin_lock_bh(&fq->lock);
 120         fq_tin_enqueue(fq, tin, flow_idx, skb,
 121 -                      fq_skb_free_func,
 122 -                      fq_flow_get_default_func);
 123 +                      fq_skb_free_func);
 124         spin_unlock_bh(&fq->lock);
 125  }
 126
 127 @@ -1459,7 +1447,6 @@ void ieee80211_txq_init(struct ieee80211
 128                         struct txq_info *txqi, int tid)
 129  {
 130         fq_tin_init(&txqi->tin);
 131 -       fq_flow_init(&txqi->def_flow);
 132         codel_vars_init(&txqi->def_cvars);
 133         codel_stats_init(&txqi->cstats);
 134         __skb_queue_head_init(&txqi->frags);
 135 @@ -3310,8 +3297,7 @@ static bool ieee80211_amsdu_aggregate(st
 136          */
 137
 138         tin = &txqi->tin;
 139 -       flow = fq_flow_classify(fq, tin, flow_idx, skb,
 140 -                               fq_flow_get_default_func);
 141 +       flow = fq_flow_classify(fq, tin, flow_idx, skb);
 142         head = skb_peek_tail(&flow->queue);
 143         if (!head || skb_is_gso(head))
 144                 goto out;