1360 lines
34 KiB
C
1360 lines
34 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NET_SCHED_GENERIC_H
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#define __NET_SCHED_GENERIC_H
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/rcupdate.h>
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#include <linux/pkt_sched.h>
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#include <linux/pkt_cls.h>
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#include <linux/percpu.h>
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#include <linux/dynamic_queue_limits.h>
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#include <linux/list.h>
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#include <linux/refcount.h>
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#include <linux/workqueue.h>
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#include <linux/mutex.h>
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#include <linux/rwsem.h>
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#include <linux/atomic.h>
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#include <linux/hashtable.h>
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#include <net/gen_stats.h>
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#include <net/rtnetlink.h>
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#include <net/flow_offload.h>
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#include <linux/xarray.h>
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struct Qdisc_ops;
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struct qdisc_walker;
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struct tcf_walker;
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struct module;
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struct bpf_flow_keys;
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struct qdisc_rate_table {
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struct tc_ratespec rate;
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u32 data[256];
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struct qdisc_rate_table *next;
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int refcnt;
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};
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enum qdisc_state_t {
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__QDISC_STATE_SCHED,
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__QDISC_STATE_DEACTIVATED,
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__QDISC_STATE_MISSED,
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__QDISC_STATE_DRAINING,
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};
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enum qdisc_state2_t {
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/* Only for !TCQ_F_NOLOCK qdisc. Never access it directly.
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* Use qdisc_run_begin/end() or qdisc_is_running() instead.
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*/
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__QDISC_STATE2_RUNNING,
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};
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#define QDISC_STATE_MISSED BIT(__QDISC_STATE_MISSED)
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#define QDISC_STATE_DRAINING BIT(__QDISC_STATE_DRAINING)
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#define QDISC_STATE_NON_EMPTY (QDISC_STATE_MISSED | \
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QDISC_STATE_DRAINING)
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struct qdisc_size_table {
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struct rcu_head rcu;
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struct list_head list;
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struct tc_sizespec szopts;
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int refcnt;
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u16 data[];
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};
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/* similar to sk_buff_head, but skb->prev pointer is undefined. */
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struct qdisc_skb_head {
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struct sk_buff *head;
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struct sk_buff *tail;
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__u32 qlen;
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spinlock_t lock;
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};
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struct Qdisc {
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int (*enqueue)(struct sk_buff *skb,
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struct Qdisc *sch,
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struct sk_buff **to_free);
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struct sk_buff * (*dequeue)(struct Qdisc *sch);
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unsigned int flags;
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#define TCQ_F_BUILTIN 1
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#define TCQ_F_INGRESS 2
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#define TCQ_F_CAN_BYPASS 4
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#define TCQ_F_MQROOT 8
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#define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for
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* q->dev_queue : It can test
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* netif_xmit_frozen_or_stopped() before
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* dequeueing next packet.
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* Its true for MQ/MQPRIO slaves, or non
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* multiqueue device.
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*/
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#define TCQ_F_WARN_NONWC (1 << 16)
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#define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */
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#define TCQ_F_NOPARENT 0x40 /* root of its hierarchy :
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* qdisc_tree_decrease_qlen() should stop.
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*/
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#define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */
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#define TCQ_F_NOLOCK 0x100 /* qdisc does not require locking */
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#define TCQ_F_OFFLOADED 0x200 /* qdisc is offloaded to HW */
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u32 limit;
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const struct Qdisc_ops *ops;
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struct qdisc_size_table __rcu *stab;
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struct hlist_node hash;
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u32 handle;
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u32 parent;
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struct netdev_queue *dev_queue;
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struct net_rate_estimator __rcu *rate_est;
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struct gnet_stats_basic_sync __percpu *cpu_bstats;
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struct gnet_stats_queue __percpu *cpu_qstats;
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int pad;
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refcount_t refcnt;
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/*
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* For performance sake on SMP, we put highly modified fields at the end
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*/
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struct sk_buff_head gso_skb ____cacheline_aligned_in_smp;
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struct qdisc_skb_head q;
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struct gnet_stats_basic_sync bstats;
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struct gnet_stats_queue qstats;
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int owner;
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unsigned long state;
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unsigned long state2; /* must be written under qdisc spinlock */
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struct Qdisc *next_sched;
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struct sk_buff_head skb_bad_txq;
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spinlock_t busylock ____cacheline_aligned_in_smp;
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spinlock_t seqlock;
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struct rcu_head rcu;
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netdevice_tracker dev_tracker;
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struct lock_class_key root_lock_key;
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/* private data */
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long privdata[] ____cacheline_aligned;
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};
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static inline void qdisc_refcount_inc(struct Qdisc *qdisc)
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{
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if (qdisc->flags & TCQ_F_BUILTIN)
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return;
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refcount_inc(&qdisc->refcnt);
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}
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static inline bool qdisc_refcount_dec_if_one(struct Qdisc *qdisc)
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{
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if (qdisc->flags & TCQ_F_BUILTIN)
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return true;
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return refcount_dec_if_one(&qdisc->refcnt);
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}
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/* Intended to be used by unlocked users, when concurrent qdisc release is
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* possible.
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*/
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static inline struct Qdisc *qdisc_refcount_inc_nz(struct Qdisc *qdisc)
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{
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if (qdisc->flags & TCQ_F_BUILTIN)
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return qdisc;
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if (refcount_inc_not_zero(&qdisc->refcnt))
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return qdisc;
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return NULL;
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}
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/* For !TCQ_F_NOLOCK qdisc: callers must either call this within a qdisc
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* root_lock section, or provide their own memory barriers -- ordering
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* against qdisc_run_begin/end() atomic bit operations.
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*/
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static inline bool qdisc_is_running(struct Qdisc *qdisc)
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{
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if (qdisc->flags & TCQ_F_NOLOCK)
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return spin_is_locked(&qdisc->seqlock);
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return test_bit(__QDISC_STATE2_RUNNING, &qdisc->state2);
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}
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static inline bool nolock_qdisc_is_empty(const struct Qdisc *qdisc)
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{
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return !(READ_ONCE(qdisc->state) & QDISC_STATE_NON_EMPTY);
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}
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static inline bool qdisc_is_percpu_stats(const struct Qdisc *q)
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{
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return q->flags & TCQ_F_CPUSTATS;
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}
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static inline bool qdisc_is_empty(const struct Qdisc *qdisc)
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{
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if (qdisc_is_percpu_stats(qdisc))
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return nolock_qdisc_is_empty(qdisc);
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return !READ_ONCE(qdisc->q.qlen);
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}
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/* For !TCQ_F_NOLOCK qdisc, qdisc_run_begin/end() must be invoked with
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* the qdisc root lock acquired.
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*/
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static inline bool qdisc_run_begin(struct Qdisc *qdisc)
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{
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if (qdisc->flags & TCQ_F_NOLOCK) {
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if (spin_trylock(&qdisc->seqlock))
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return true;
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/* No need to insist if the MISSED flag was already set.
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* Note that test_and_set_bit() also gives us memory ordering
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* guarantees wrt potential earlier enqueue() and below
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* spin_trylock(), both of which are necessary to prevent races
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*/
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if (test_and_set_bit(__QDISC_STATE_MISSED, &qdisc->state))
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return false;
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/* Try to take the lock again to make sure that we will either
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* grab it or the CPU that still has it will see MISSED set
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* when testing it in qdisc_run_end()
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*/
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return spin_trylock(&qdisc->seqlock);
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}
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return !__test_and_set_bit(__QDISC_STATE2_RUNNING, &qdisc->state2);
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}
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static inline void qdisc_run_end(struct Qdisc *qdisc)
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{
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if (qdisc->flags & TCQ_F_NOLOCK) {
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spin_unlock(&qdisc->seqlock);
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/* spin_unlock() only has store-release semantic. The unlock
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* and test_bit() ordering is a store-load ordering, so a full
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* memory barrier is needed here.
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*/
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smp_mb();
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if (unlikely(test_bit(__QDISC_STATE_MISSED,
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&qdisc->state)))
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__netif_schedule(qdisc);
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} else {
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__clear_bit(__QDISC_STATE2_RUNNING, &qdisc->state2);
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}
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}
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static inline bool qdisc_may_bulk(const struct Qdisc *qdisc)
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{
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return qdisc->flags & TCQ_F_ONETXQUEUE;
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}
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static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq)
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{
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return netdev_queue_dql_avail(txq);
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}
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struct Qdisc_class_ops {
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unsigned int flags;
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/* Child qdisc manipulation */
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struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
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int (*graft)(struct Qdisc *, unsigned long cl,
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struct Qdisc *, struct Qdisc **,
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struct netlink_ext_ack *extack);
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struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
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void (*qlen_notify)(struct Qdisc *, unsigned long);
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/* Class manipulation routines */
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unsigned long (*find)(struct Qdisc *, u32 classid);
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int (*change)(struct Qdisc *, u32, u32,
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struct nlattr **, unsigned long *,
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struct netlink_ext_ack *);
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int (*delete)(struct Qdisc *, unsigned long,
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struct netlink_ext_ack *);
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void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
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/* Filter manipulation */
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struct tcf_block * (*tcf_block)(struct Qdisc *sch,
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unsigned long arg,
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struct netlink_ext_ack *extack);
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unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
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u32 classid);
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void (*unbind_tcf)(struct Qdisc *, unsigned long);
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/* rtnetlink specific */
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int (*dump)(struct Qdisc *, unsigned long,
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struct sk_buff *skb, struct tcmsg*);
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int (*dump_stats)(struct Qdisc *, unsigned long,
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struct gnet_dump *);
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};
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/* Qdisc_class_ops flag values */
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/* Implements API that doesn't require rtnl lock */
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enum qdisc_class_ops_flags {
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QDISC_CLASS_OPS_DOIT_UNLOCKED = 1,
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};
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struct Qdisc_ops {
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struct Qdisc_ops *next;
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const struct Qdisc_class_ops *cl_ops;
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char id[IFNAMSIZ];
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int priv_size;
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unsigned int static_flags;
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int (*enqueue)(struct sk_buff *skb,
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struct Qdisc *sch,
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struct sk_buff **to_free);
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struct sk_buff * (*dequeue)(struct Qdisc *);
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struct sk_buff * (*peek)(struct Qdisc *);
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int (*init)(struct Qdisc *sch, struct nlattr *arg,
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struct netlink_ext_ack *extack);
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void (*reset)(struct Qdisc *);
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void (*destroy)(struct Qdisc *);
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int (*change)(struct Qdisc *sch,
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struct nlattr *arg,
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struct netlink_ext_ack *extack);
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void (*attach)(struct Qdisc *sch);
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int (*change_tx_queue_len)(struct Qdisc *, unsigned int);
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void (*change_real_num_tx)(struct Qdisc *sch,
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unsigned int new_real_tx);
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int (*dump)(struct Qdisc *, struct sk_buff *);
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int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
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void (*ingress_block_set)(struct Qdisc *sch,
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u32 block_index);
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void (*egress_block_set)(struct Qdisc *sch,
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u32 block_index);
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u32 (*ingress_block_get)(struct Qdisc *sch);
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u32 (*egress_block_get)(struct Qdisc *sch);
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struct module *owner;
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};
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struct tcf_result {
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union {
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struct {
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unsigned long class;
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u32 classid;
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};
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const struct tcf_proto *goto_tp;
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};
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};
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struct tcf_chain;
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struct tcf_proto_ops {
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struct list_head head;
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char kind[IFNAMSIZ];
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int (*classify)(struct sk_buff *,
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const struct tcf_proto *,
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struct tcf_result *);
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int (*init)(struct tcf_proto*);
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void (*destroy)(struct tcf_proto *tp, bool rtnl_held,
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struct netlink_ext_ack *extack);
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void* (*get)(struct tcf_proto*, u32 handle);
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void (*put)(struct tcf_proto *tp, void *f);
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int (*change)(struct net *net, struct sk_buff *,
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struct tcf_proto*, unsigned long,
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u32 handle, struct nlattr **,
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void **, u32,
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struct netlink_ext_ack *);
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int (*delete)(struct tcf_proto *tp, void *arg,
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bool *last, bool rtnl_held,
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struct netlink_ext_ack *);
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bool (*delete_empty)(struct tcf_proto *tp);
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void (*walk)(struct tcf_proto *tp,
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struct tcf_walker *arg, bool rtnl_held);
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int (*reoffload)(struct tcf_proto *tp, bool add,
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flow_setup_cb_t *cb, void *cb_priv,
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struct netlink_ext_ack *extack);
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void (*hw_add)(struct tcf_proto *tp,
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void *type_data);
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void (*hw_del)(struct tcf_proto *tp,
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void *type_data);
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void (*bind_class)(void *, u32, unsigned long,
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void *, unsigned long);
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void * (*tmplt_create)(struct net *net,
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struct tcf_chain *chain,
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struct nlattr **tca,
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struct netlink_ext_ack *extack);
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void (*tmplt_destroy)(void *tmplt_priv);
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void (*tmplt_reoffload)(struct tcf_chain *chain,
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bool add,
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flow_setup_cb_t *cb,
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void *cb_priv);
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struct tcf_exts * (*get_exts)(const struct tcf_proto *tp,
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u32 handle);
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/* rtnetlink specific */
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int (*dump)(struct net*, struct tcf_proto*, void *,
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struct sk_buff *skb, struct tcmsg*,
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bool);
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int (*terse_dump)(struct net *net,
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struct tcf_proto *tp, void *fh,
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struct sk_buff *skb,
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struct tcmsg *t, bool rtnl_held);
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int (*tmplt_dump)(struct sk_buff *skb,
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struct net *net,
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void *tmplt_priv);
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struct module *owner;
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int flags;
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};
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/* Classifiers setting TCF_PROTO_OPS_DOIT_UNLOCKED in tcf_proto_ops->flags
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* are expected to implement tcf_proto_ops->delete_empty(), otherwise race
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* conditions can occur when filters are inserted/deleted simultaneously.
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*/
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enum tcf_proto_ops_flags {
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TCF_PROTO_OPS_DOIT_UNLOCKED = 1,
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};
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struct tcf_proto {
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/* Fast access part */
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struct tcf_proto __rcu *next;
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void __rcu *root;
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/* called under RCU BH lock*/
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int (*classify)(struct sk_buff *,
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const struct tcf_proto *,
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struct tcf_result *);
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__be16 protocol;
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/* All the rest */
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u32 prio;
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void *data;
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const struct tcf_proto_ops *ops;
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struct tcf_chain *chain;
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/* Lock protects tcf_proto shared state and can be used by unlocked
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* classifiers to protect their private data.
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*/
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spinlock_t lock;
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bool deleting;
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bool counted;
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bool usesw;
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refcount_t refcnt;
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struct rcu_head rcu;
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struct hlist_node destroy_ht_node;
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};
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struct qdisc_skb_cb {
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struct {
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unsigned int pkt_len;
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u16 slave_dev_queue_mapping;
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u16 tc_classid;
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};
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#define QDISC_CB_PRIV_LEN 20
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unsigned char data[QDISC_CB_PRIV_LEN];
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};
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typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv);
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struct tcf_chain {
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/* Protects filter_chain. */
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struct mutex filter_chain_lock;
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struct tcf_proto __rcu *filter_chain;
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struct list_head list;
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struct tcf_block *block;
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u32 index; /* chain index */
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unsigned int refcnt;
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unsigned int action_refcnt;
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bool explicitly_created;
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bool flushing;
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const struct tcf_proto_ops *tmplt_ops;
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void *tmplt_priv;
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struct rcu_head rcu;
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};
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struct tcf_block {
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struct xarray ports; /* datapath accessible */
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/* Lock protects tcf_block and lifetime-management data of chains
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* attached to the block (refcnt, action_refcnt, explicitly_created).
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*/
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struct mutex lock;
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struct list_head chain_list;
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u32 index; /* block index for shared blocks */
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u32 classid; /* which class this block belongs to */
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refcount_t refcnt;
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struct net *net;
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struct Qdisc *q;
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struct rw_semaphore cb_lock; /* protects cb_list and offload counters */
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struct flow_block flow_block;
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struct list_head owner_list;
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bool keep_dst;
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atomic_t useswcnt;
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atomic_t offloadcnt; /* Number of oddloaded filters */
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unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */
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unsigned int lockeddevcnt; /* Number of devs that require rtnl lock. */
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struct {
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struct tcf_chain *chain;
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struct list_head filter_chain_list;
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} chain0;
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struct rcu_head rcu;
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DECLARE_HASHTABLE(proto_destroy_ht, 7);
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struct mutex proto_destroy_lock; /* Lock for proto_destroy hashtable. */
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};
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struct tcf_block *tcf_block_lookup(struct net *net, u32 block_index);
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static inline bool lockdep_tcf_chain_is_locked(struct tcf_chain *chain)
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{
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return lockdep_is_held(&chain->filter_chain_lock);
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}
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static inline bool lockdep_tcf_proto_is_locked(struct tcf_proto *tp)
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{
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return lockdep_is_held(&tp->lock);
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}
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|
|
|
#define tcf_chain_dereference(p, chain) \
|
|
rcu_dereference_protected(p, lockdep_tcf_chain_is_locked(chain))
|
|
|
|
#define tcf_proto_dereference(p, tp) \
|
|
rcu_dereference_protected(p, lockdep_tcf_proto_is_locked(tp))
|
|
|
|
static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
|
|
{
|
|
struct qdisc_skb_cb *qcb;
|
|
|
|
BUILD_BUG_ON(sizeof(skb->cb) < sizeof(*qcb));
|
|
BUILD_BUG_ON(sizeof(qcb->data) < sz);
|
|
}
|
|
|
|
static inline int qdisc_qlen(const struct Qdisc *q)
|
|
{
|
|
return q->q.qlen;
|
|
}
|
|
|
|
static inline int qdisc_qlen_sum(const struct Qdisc *q)
|
|
{
|
|
__u32 qlen = q->qstats.qlen;
|
|
int i;
|
|
|
|
if (qdisc_is_percpu_stats(q)) {
|
|
for_each_possible_cpu(i)
|
|
qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen;
|
|
} else {
|
|
qlen += q->q.qlen;
|
|
}
|
|
|
|
return qlen;
|
|
}
|
|
|
|
static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb)
|
|
{
|
|
return (struct qdisc_skb_cb *)skb->cb;
|
|
}
|
|
|
|
static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
|
|
{
|
|
return &qdisc->q.lock;
|
|
}
|
|
|
|
static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc)
|
|
{
|
|
struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc);
|
|
|
|
return q;
|
|
}
|
|
|
|
static inline struct Qdisc *qdisc_root_bh(const struct Qdisc *qdisc)
|
|
{
|
|
return rcu_dereference_bh(qdisc->dev_queue->qdisc);
|
|
}
|
|
|
|
static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc)
|
|
{
|
|
return rcu_dereference_rtnl(qdisc->dev_queue->qdisc_sleeping);
|
|
}
|
|
|
|
static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc)
|
|
{
|
|
struct Qdisc *root = qdisc_root_sleeping(qdisc);
|
|
|
|
ASSERT_RTNL();
|
|
return qdisc_lock(root);
|
|
}
|
|
|
|
static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc)
|
|
{
|
|
return qdisc->dev_queue->dev;
|
|
}
|
|
|
|
static inline void sch_tree_lock(struct Qdisc *q)
|
|
{
|
|
if (q->flags & TCQ_F_MQROOT)
|
|
spin_lock_bh(qdisc_lock(q));
|
|
else
|
|
spin_lock_bh(qdisc_root_sleeping_lock(q));
|
|
}
|
|
|
|
static inline void sch_tree_unlock(struct Qdisc *q)
|
|
{
|
|
if (q->flags & TCQ_F_MQROOT)
|
|
spin_unlock_bh(qdisc_lock(q));
|
|
else
|
|
spin_unlock_bh(qdisc_root_sleeping_lock(q));
|
|
}
|
|
|
|
extern struct Qdisc noop_qdisc;
|
|
extern struct Qdisc_ops noop_qdisc_ops;
|
|
extern struct Qdisc_ops pfifo_fast_ops;
|
|
extern const u8 sch_default_prio2band[TC_PRIO_MAX + 1];
|
|
extern struct Qdisc_ops mq_qdisc_ops;
|
|
extern struct Qdisc_ops noqueue_qdisc_ops;
|
|
extern const struct Qdisc_ops *default_qdisc_ops;
|
|
static inline const struct Qdisc_ops *
|
|
get_default_qdisc_ops(const struct net_device *dev, int ntx)
|
|
{
|
|
return ntx < dev->real_num_tx_queues ?
|
|
default_qdisc_ops : &pfifo_fast_ops;
|
|
}
|
|
|
|
struct Qdisc_class_common {
|
|
u32 classid;
|
|
unsigned int filter_cnt;
|
|
struct hlist_node hnode;
|
|
};
|
|
|
|
struct Qdisc_class_hash {
|
|
struct hlist_head *hash;
|
|
unsigned int hashsize;
|
|
unsigned int hashmask;
|
|
unsigned int hashelems;
|
|
};
|
|
|
|
static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
|
|
{
|
|
id ^= id >> 8;
|
|
id ^= id >> 4;
|
|
return id & mask;
|
|
}
|
|
|
|
static inline struct Qdisc_class_common *
|
|
qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id)
|
|
{
|
|
struct Qdisc_class_common *cl;
|
|
unsigned int h;
|
|
|
|
if (!id)
|
|
return NULL;
|
|
|
|
h = qdisc_class_hash(id, hash->hashmask);
|
|
hlist_for_each_entry(cl, &hash->hash[h], hnode) {
|
|
if (cl->classid == id)
|
|
return cl;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool qdisc_class_in_use(const struct Qdisc_class_common *cl)
|
|
{
|
|
return cl->filter_cnt > 0;
|
|
}
|
|
|
|
static inline void qdisc_class_get(struct Qdisc_class_common *cl)
|
|
{
|
|
unsigned int res;
|
|
|
|
if (check_add_overflow(cl->filter_cnt, 1, &res))
|
|
WARN(1, "Qdisc class overflow");
|
|
|
|
cl->filter_cnt = res;
|
|
}
|
|
|
|
static inline void qdisc_class_put(struct Qdisc_class_common *cl)
|
|
{
|
|
unsigned int res;
|
|
|
|
if (check_sub_overflow(cl->filter_cnt, 1, &res))
|
|
WARN(1, "Qdisc class underflow");
|
|
|
|
cl->filter_cnt = res;
|
|
}
|
|
|
|
static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid)
|
|
{
|
|
u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY;
|
|
|
|
return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL;
|
|
}
|
|
|
|
int qdisc_class_hash_init(struct Qdisc_class_hash *);
|
|
void qdisc_class_hash_insert(struct Qdisc_class_hash *,
|
|
struct Qdisc_class_common *);
|
|
void qdisc_class_hash_remove(struct Qdisc_class_hash *,
|
|
struct Qdisc_class_common *);
|
|
void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
|
|
void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
|
|
|
|
int dev_qdisc_change_tx_queue_len(struct net_device *dev);
|
|
void dev_qdisc_change_real_num_tx(struct net_device *dev,
|
|
unsigned int new_real_tx);
|
|
void dev_init_scheduler(struct net_device *dev);
|
|
void dev_shutdown(struct net_device *dev);
|
|
void dev_activate(struct net_device *dev);
|
|
void dev_deactivate(struct net_device *dev);
|
|
void dev_deactivate_many(struct list_head *head);
|
|
struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
|
|
struct Qdisc *qdisc);
|
|
void qdisc_reset(struct Qdisc *qdisc);
|
|
void qdisc_destroy(struct Qdisc *qdisc);
|
|
void qdisc_put(struct Qdisc *qdisc);
|
|
void qdisc_put_unlocked(struct Qdisc *qdisc);
|
|
void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, int n, int len);
|
|
#ifdef CONFIG_NET_SCHED
|
|
int qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type,
|
|
void *type_data);
|
|
void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch,
|
|
struct Qdisc *new, struct Qdisc *old,
|
|
enum tc_setup_type type, void *type_data,
|
|
struct netlink_ext_ack *extack);
|
|
#else
|
|
static inline int
|
|
qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type,
|
|
void *type_data)
|
|
{
|
|
q->flags &= ~TCQ_F_OFFLOADED;
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch,
|
|
struct Qdisc *new, struct Qdisc *old,
|
|
enum tc_setup_type type, void *type_data,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
}
|
|
#endif
|
|
void qdisc_offload_query_caps(struct net_device *dev,
|
|
enum tc_setup_type type,
|
|
void *caps, size_t caps_len);
|
|
struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
|
|
const struct Qdisc_ops *ops,
|
|
struct netlink_ext_ack *extack);
|
|
void qdisc_free(struct Qdisc *qdisc);
|
|
struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
|
|
const struct Qdisc_ops *ops, u32 parentid,
|
|
struct netlink_ext_ack *extack);
|
|
void __qdisc_calculate_pkt_len(struct sk_buff *skb,
|
|
const struct qdisc_size_table *stab);
|
|
int skb_do_redirect(struct sk_buff *);
|
|
|
|
static inline bool skb_at_tc_ingress(const struct sk_buff *skb)
|
|
{
|
|
#ifdef CONFIG_NET_XGRESS
|
|
return skb->tc_at_ingress;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
static inline bool skb_skip_tc_classify(struct sk_buff *skb)
|
|
{
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
if (skb->tc_skip_classify) {
|
|
skb->tc_skip_classify = 0;
|
|
return true;
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
/* Reset all TX qdiscs greater than index of a device. */
|
|
static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
|
|
{
|
|
struct Qdisc *qdisc;
|
|
|
|
for (; i < dev->num_tx_queues; i++) {
|
|
qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc);
|
|
if (qdisc) {
|
|
spin_lock_bh(qdisc_lock(qdisc));
|
|
qdisc_reset(qdisc);
|
|
spin_unlock_bh(qdisc_lock(qdisc));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Are all TX queues of the device empty? */
|
|
static inline bool qdisc_all_tx_empty(const struct net_device *dev)
|
|
{
|
|
unsigned int i;
|
|
|
|
rcu_read_lock();
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
|
const struct Qdisc *q = rcu_dereference(txq->qdisc);
|
|
|
|
if (!qdisc_is_empty(q)) {
|
|
rcu_read_unlock();
|
|
return false;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
return true;
|
|
}
|
|
|
|
/* Are any of the TX qdiscs changing? */
|
|
static inline bool qdisc_tx_changing(const struct net_device *dev)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
|
|
|
if (rcu_access_pointer(txq->qdisc) !=
|
|
rcu_access_pointer(txq->qdisc_sleeping))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Is the device using the noop qdisc on all queues? */
|
|
static inline bool qdisc_tx_is_noop(const struct net_device *dev)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
|
if (rcu_access_pointer(txq->qdisc) != &noop_qdisc)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
|
|
{
|
|
return qdisc_skb_cb(skb)->pkt_len;
|
|
}
|
|
|
|
/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
|
|
enum net_xmit_qdisc_t {
|
|
__NET_XMIT_STOLEN = 0x00010000,
|
|
__NET_XMIT_BYPASS = 0x00020000,
|
|
};
|
|
|
|
#ifdef CONFIG_NET_CLS_ACT
|
|
#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
|
|
#else
|
|
#define net_xmit_drop_count(e) (1)
|
|
#endif
|
|
|
|
static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
|
|
const struct Qdisc *sch)
|
|
{
|
|
#ifdef CONFIG_NET_SCHED
|
|
struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
|
|
|
|
if (stab)
|
|
__qdisc_calculate_pkt_len(skb, stab);
|
|
#endif
|
|
}
|
|
|
|
static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
|
|
struct sk_buff **to_free)
|
|
{
|
|
return sch->enqueue(skb, sch, to_free);
|
|
}
|
|
|
|
static inline void _bstats_update(struct gnet_stats_basic_sync *bstats,
|
|
__u64 bytes, __u32 packets)
|
|
{
|
|
u64_stats_update_begin(&bstats->syncp);
|
|
u64_stats_add(&bstats->bytes, bytes);
|
|
u64_stats_add(&bstats->packets, packets);
|
|
u64_stats_update_end(&bstats->syncp);
|
|
}
|
|
|
|
static inline void bstats_update(struct gnet_stats_basic_sync *bstats,
|
|
const struct sk_buff *skb)
|
|
{
|
|
_bstats_update(bstats,
|
|
qdisc_pkt_len(skb),
|
|
skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1);
|
|
}
|
|
|
|
static inline void qdisc_bstats_cpu_update(struct Qdisc *sch,
|
|
const struct sk_buff *skb)
|
|
{
|
|
bstats_update(this_cpu_ptr(sch->cpu_bstats), skb);
|
|
}
|
|
|
|
static inline void qdisc_bstats_update(struct Qdisc *sch,
|
|
const struct sk_buff *skb)
|
|
{
|
|
bstats_update(&sch->bstats, skb);
|
|
}
|
|
|
|
static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch,
|
|
const struct sk_buff *skb)
|
|
{
|
|
sch->qstats.backlog -= qdisc_pkt_len(skb);
|
|
}
|
|
|
|
static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch,
|
|
const struct sk_buff *skb)
|
|
{
|
|
this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb));
|
|
}
|
|
|
|
static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch,
|
|
const struct sk_buff *skb)
|
|
{
|
|
sch->qstats.backlog += qdisc_pkt_len(skb);
|
|
}
|
|
|
|
static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch,
|
|
const struct sk_buff *skb)
|
|
{
|
|
this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb));
|
|
}
|
|
|
|
static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch)
|
|
{
|
|
this_cpu_inc(sch->cpu_qstats->qlen);
|
|
}
|
|
|
|
static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch)
|
|
{
|
|
this_cpu_dec(sch->cpu_qstats->qlen);
|
|
}
|
|
|
|
static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch)
|
|
{
|
|
this_cpu_inc(sch->cpu_qstats->requeues);
|
|
}
|
|
|
|
static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count)
|
|
{
|
|
sch->qstats.drops += count;
|
|
}
|
|
|
|
static inline void qstats_drop_inc(struct gnet_stats_queue *qstats)
|
|
{
|
|
qstats->drops++;
|
|
}
|
|
|
|
static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats)
|
|
{
|
|
qstats->overlimits++;
|
|
}
|
|
|
|
static inline void qdisc_qstats_drop(struct Qdisc *sch)
|
|
{
|
|
qstats_drop_inc(&sch->qstats);
|
|
}
|
|
|
|
static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch)
|
|
{
|
|
this_cpu_inc(sch->cpu_qstats->drops);
|
|
}
|
|
|
|
static inline void qdisc_qstats_overlimit(struct Qdisc *sch)
|
|
{
|
|
sch->qstats.overlimits++;
|
|
}
|
|
|
|
static inline int qdisc_qstats_copy(struct gnet_dump *d, struct Qdisc *sch)
|
|
{
|
|
__u32 qlen = qdisc_qlen_sum(sch);
|
|
|
|
return gnet_stats_copy_queue(d, sch->cpu_qstats, &sch->qstats, qlen);
|
|
}
|
|
|
|
static inline void qdisc_qstats_qlen_backlog(struct Qdisc *sch, __u32 *qlen,
|
|
__u32 *backlog)
|
|
{
|
|
struct gnet_stats_queue qstats = { 0 };
|
|
|
|
gnet_stats_add_queue(&qstats, sch->cpu_qstats, &sch->qstats);
|
|
*qlen = qstats.qlen + qdisc_qlen(sch);
|
|
*backlog = qstats.backlog;
|
|
}
|
|
|
|
static inline void qdisc_tree_flush_backlog(struct Qdisc *sch)
|
|
{
|
|
__u32 qlen, backlog;
|
|
|
|
qdisc_qstats_qlen_backlog(sch, &qlen, &backlog);
|
|
qdisc_tree_reduce_backlog(sch, qlen, backlog);
|
|
}
|
|
|
|
static inline void qdisc_purge_queue(struct Qdisc *sch)
|
|
{
|
|
__u32 qlen, backlog;
|
|
|
|
qdisc_qstats_qlen_backlog(sch, &qlen, &backlog);
|
|
qdisc_reset(sch);
|
|
qdisc_tree_reduce_backlog(sch, qlen, backlog);
|
|
}
|
|
|
|
static inline void __qdisc_enqueue_tail(struct sk_buff *skb,
|
|
struct qdisc_skb_head *qh)
|
|
{
|
|
struct sk_buff *last = qh->tail;
|
|
|
|
if (last) {
|
|
skb->next = NULL;
|
|
last->next = skb;
|
|
qh->tail = skb;
|
|
} else {
|
|
qh->tail = skb;
|
|
qh->head = skb;
|
|
}
|
|
qh->qlen++;
|
|
}
|
|
|
|
static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
__qdisc_enqueue_tail(skb, &sch->q);
|
|
qdisc_qstats_backlog_inc(sch, skb);
|
|
return NET_XMIT_SUCCESS;
|
|
}
|
|
|
|
static inline void __qdisc_enqueue_head(struct sk_buff *skb,
|
|
struct qdisc_skb_head *qh)
|
|
{
|
|
skb->next = qh->head;
|
|
|
|
if (!qh->head)
|
|
qh->tail = skb;
|
|
qh->head = skb;
|
|
qh->qlen++;
|
|
}
|
|
|
|
static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh)
|
|
{
|
|
struct sk_buff *skb = qh->head;
|
|
|
|
if (likely(skb != NULL)) {
|
|
qh->head = skb->next;
|
|
qh->qlen--;
|
|
if (qh->head == NULL)
|
|
qh->tail = NULL;
|
|
skb->next = NULL;
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
|
|
{
|
|
struct sk_buff *skb = __qdisc_dequeue_head(&sch->q);
|
|
|
|
if (likely(skb != NULL)) {
|
|
qdisc_qstats_backlog_dec(sch, skb);
|
|
qdisc_bstats_update(sch, skb);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
struct tc_skb_cb {
|
|
struct qdisc_skb_cb qdisc_cb;
|
|
u32 drop_reason;
|
|
|
|
u16 zone; /* Only valid if post_ct = true */
|
|
u16 mru;
|
|
u8 post_ct:1;
|
|
u8 post_ct_snat:1;
|
|
u8 post_ct_dnat:1;
|
|
};
|
|
|
|
static inline struct tc_skb_cb *tc_skb_cb(const struct sk_buff *skb)
|
|
{
|
|
struct tc_skb_cb *cb = (struct tc_skb_cb *)skb->cb;
|
|
|
|
BUILD_BUG_ON(sizeof(*cb) > sizeof_field(struct sk_buff, cb));
|
|
return cb;
|
|
}
|
|
|
|
static inline enum skb_drop_reason
|
|
tcf_get_drop_reason(const struct sk_buff *skb)
|
|
{
|
|
return tc_skb_cb(skb)->drop_reason;
|
|
}
|
|
|
|
static inline void tcf_set_drop_reason(const struct sk_buff *skb,
|
|
enum skb_drop_reason reason)
|
|
{
|
|
tc_skb_cb(skb)->drop_reason = reason;
|
|
}
|
|
|
|
/* Instead of calling kfree_skb() while root qdisc lock is held,
|
|
* queue the skb for future freeing at end of __dev_xmit_skb()
|
|
*/
|
|
static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free)
|
|
{
|
|
skb->next = *to_free;
|
|
*to_free = skb;
|
|
}
|
|
|
|
static inline void __qdisc_drop_all(struct sk_buff *skb,
|
|
struct sk_buff **to_free)
|
|
{
|
|
if (skb->prev)
|
|
skb->prev->next = *to_free;
|
|
else
|
|
skb->next = *to_free;
|
|
*to_free = skb;
|
|
}
|
|
|
|
static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
|
|
struct qdisc_skb_head *qh,
|
|
struct sk_buff **to_free)
|
|
{
|
|
struct sk_buff *skb = __qdisc_dequeue_head(qh);
|
|
|
|
if (likely(skb != NULL)) {
|
|
unsigned int len = qdisc_pkt_len(skb);
|
|
|
|
qdisc_qstats_backlog_dec(sch, skb);
|
|
__qdisc_drop(skb, to_free);
|
|
return len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch)
|
|
{
|
|
const struct qdisc_skb_head *qh = &sch->q;
|
|
|
|
return qh->head;
|
|
}
|
|
|
|
/* generic pseudo peek method for non-work-conserving qdisc */
|
|
static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
|
|
{
|
|
struct sk_buff *skb = skb_peek(&sch->gso_skb);
|
|
|
|
/* we can reuse ->gso_skb because peek isn't called for root qdiscs */
|
|
if (!skb) {
|
|
skb = sch->dequeue(sch);
|
|
|
|
if (skb) {
|
|
__skb_queue_head(&sch->gso_skb, skb);
|
|
/* it's still part of the queue */
|
|
qdisc_qstats_backlog_inc(sch, skb);
|
|
sch->q.qlen++;
|
|
}
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline void qdisc_update_stats_at_dequeue(struct Qdisc *sch,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (qdisc_is_percpu_stats(sch)) {
|
|
qdisc_qstats_cpu_backlog_dec(sch, skb);
|
|
qdisc_bstats_cpu_update(sch, skb);
|
|
qdisc_qstats_cpu_qlen_dec(sch);
|
|
} else {
|
|
qdisc_qstats_backlog_dec(sch, skb);
|
|
qdisc_bstats_update(sch, skb);
|
|
sch->q.qlen--;
|
|
}
|
|
}
|
|
|
|
static inline void qdisc_update_stats_at_enqueue(struct Qdisc *sch,
|
|
unsigned int pkt_len)
|
|
{
|
|
if (qdisc_is_percpu_stats(sch)) {
|
|
qdisc_qstats_cpu_qlen_inc(sch);
|
|
this_cpu_add(sch->cpu_qstats->backlog, pkt_len);
|
|
} else {
|
|
sch->qstats.backlog += pkt_len;
|
|
sch->q.qlen++;
|
|
}
|
|
}
|
|
|
|
/* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
|
|
static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
|
|
{
|
|
struct sk_buff *skb = skb_peek(&sch->gso_skb);
|
|
|
|
if (skb) {
|
|
skb = __skb_dequeue(&sch->gso_skb);
|
|
if (qdisc_is_percpu_stats(sch)) {
|
|
qdisc_qstats_cpu_backlog_dec(sch, skb);
|
|
qdisc_qstats_cpu_qlen_dec(sch);
|
|
} else {
|
|
qdisc_qstats_backlog_dec(sch, skb);
|
|
sch->q.qlen--;
|
|
}
|
|
} else {
|
|
skb = sch->dequeue(sch);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh)
|
|
{
|
|
/*
|
|
* We do not know the backlog in bytes of this list, it
|
|
* is up to the caller to correct it
|
|
*/
|
|
ASSERT_RTNL();
|
|
if (qh->qlen) {
|
|
rtnl_kfree_skbs(qh->head, qh->tail);
|
|
|
|
qh->head = NULL;
|
|
qh->tail = NULL;
|
|
qh->qlen = 0;
|
|
}
|
|
}
|
|
|
|
static inline void qdisc_reset_queue(struct Qdisc *sch)
|
|
{
|
|
__qdisc_reset_queue(&sch->q);
|
|
}
|
|
|
|
static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new,
|
|
struct Qdisc **pold)
|
|
{
|
|
struct Qdisc *old;
|
|
|
|
sch_tree_lock(sch);
|
|
old = *pold;
|
|
*pold = new;
|
|
if (old != NULL)
|
|
qdisc_purge_queue(old);
|
|
sch_tree_unlock(sch);
|
|
|
|
return old;
|
|
}
|
|
|
|
static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
rtnl_kfree_skbs(skb, skb);
|
|
qdisc_qstats_drop(sch);
|
|
}
|
|
|
|
static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch,
|
|
struct sk_buff **to_free)
|
|
{
|
|
__qdisc_drop(skb, to_free);
|
|
qdisc_qstats_cpu_drop(sch);
|
|
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch,
|
|
struct sk_buff **to_free)
|
|
{
|
|
__qdisc_drop(skb, to_free);
|
|
qdisc_qstats_drop(sch);
|
|
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
static inline int qdisc_drop_all(struct sk_buff *skb, struct Qdisc *sch,
|
|
struct sk_buff **to_free)
|
|
{
|
|
__qdisc_drop_all(skb, to_free);
|
|
qdisc_qstats_drop(sch);
|
|
|
|
return NET_XMIT_DROP;
|
|
}
|
|
|
|
struct psched_ratecfg {
|
|
u64 rate_bytes_ps; /* bytes per second */
|
|
u32 mult;
|
|
u16 overhead;
|
|
u16 mpu;
|
|
u8 linklayer;
|
|
u8 shift;
|
|
};
|
|
|
|
static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
|
|
unsigned int len)
|
|
{
|
|
len += r->overhead;
|
|
|
|
if (len < r->mpu)
|
|
len = r->mpu;
|
|
|
|
if (unlikely(r->linklayer == TC_LINKLAYER_ATM))
|
|
return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift;
|
|
|
|
return ((u64)len * r->mult) >> r->shift;
|
|
}
|
|
|
|
void psched_ratecfg_precompute(struct psched_ratecfg *r,
|
|
const struct tc_ratespec *conf,
|
|
u64 rate64);
|
|
|
|
static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
|
|
const struct psched_ratecfg *r)
|
|
{
|
|
memset(res, 0, sizeof(*res));
|
|
|
|
/* legacy struct tc_ratespec has a 32bit @rate field
|
|
* Qdisc using 64bit rate should add new attributes
|
|
* in order to maintain compatibility.
|
|
*/
|
|
res->rate = min_t(u64, r->rate_bytes_ps, ~0U);
|
|
|
|
res->overhead = r->overhead;
|
|
res->mpu = r->mpu;
|
|
res->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
|
|
}
|
|
|
|
struct psched_pktrate {
|
|
u64 rate_pkts_ps; /* packets per second */
|
|
u32 mult;
|
|
u8 shift;
|
|
};
|
|
|
|
static inline u64 psched_pkt2t_ns(const struct psched_pktrate *r,
|
|
unsigned int pkt_num)
|
|
{
|
|
return ((u64)pkt_num * r->mult) >> r->shift;
|
|
}
|
|
|
|
void psched_ppscfg_precompute(struct psched_pktrate *r, u64 pktrate64);
|
|
|
|
/* Mini Qdisc serves for specific needs of ingress/clsact Qdisc.
|
|
* The fast path only needs to access filter list and to update stats
|
|
*/
|
|
struct mini_Qdisc {
|
|
struct tcf_proto *filter_list;
|
|
struct tcf_block *block;
|
|
struct gnet_stats_basic_sync __percpu *cpu_bstats;
|
|
struct gnet_stats_queue __percpu *cpu_qstats;
|
|
unsigned long rcu_state;
|
|
};
|
|
|
|
static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq,
|
|
const struct sk_buff *skb)
|
|
{
|
|
bstats_update(this_cpu_ptr(miniq->cpu_bstats), skb);
|
|
}
|
|
|
|
static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq)
|
|
{
|
|
this_cpu_inc(miniq->cpu_qstats->drops);
|
|
}
|
|
|
|
struct mini_Qdisc_pair {
|
|
struct mini_Qdisc miniq1;
|
|
struct mini_Qdisc miniq2;
|
|
struct mini_Qdisc __rcu **p_miniq;
|
|
};
|
|
|
|
void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp,
|
|
struct tcf_proto *tp_head);
|
|
void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc,
|
|
struct mini_Qdisc __rcu **p_miniq);
|
|
void mini_qdisc_pair_block_init(struct mini_Qdisc_pair *miniqp,
|
|
struct tcf_block *block);
|
|
|
|
void mq_change_real_num_tx(struct Qdisc *sch, unsigned int new_real_tx);
|
|
|
|
int sch_frag_xmit_hook(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb));
|
|
|
|
/* Make sure qdisc is no longer in SCHED state. */
|
|
static inline void qdisc_synchronize(const struct Qdisc *q)
|
|
{
|
|
while (test_bit(__QDISC_STATE_SCHED, &q->state))
|
|
msleep(1);
|
|
}
|
|
|
|
#endif
|