/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __NET_PKT_SCHED_H #define __NET_PKT_SCHED_H #include <linux/jiffies.h> #include <linux/ktime.h> #include <linux/if_vlan.h> #include <linux/netdevice.h> #include <net/sch_generic.h> #include <net/net_namespace.h> #include <uapi/linux/pkt_sched.h> #define DEFAULT_TX_QUEUE_LEN … #define STAB_SIZE_LOG_MAX … struct qdisc_walker { … }; #define qdisc_priv(q) … static inline struct Qdisc *qdisc_from_priv(void *priv) { … } /* Timer resolution MUST BE < 10% of min_schedulable_packet_size/bandwidth Normal IP packet size ~ 512byte, hence: 0.5Kbyte/1Mbyte/sec = 0.5msec, so that we need 50usec timer for 10Mbit ethernet. 10msec resolution -> <50Kbit/sec. The result: [34]86 is not good choice for QoS router :-( The things are not so bad, because we may use artificial clock evaluated by integration of network data flow in the most critical places. */ psched_time_t; psched_tdiff_t; /* Avoid doing 64 bit divide */ #define PSCHED_SHIFT … #define PSCHED_TICKS2NS(x) … #define PSCHED_NS2TICKS(x) … #define PSCHED_TICKS_PER_SEC … #define PSCHED_PASTPERFECT … static inline psched_time_t psched_get_time(void) { … } struct qdisc_watchdog { … }; void qdisc_watchdog_init_clockid(struct qdisc_watchdog *wd, struct Qdisc *qdisc, clockid_t clockid); void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc); void qdisc_watchdog_schedule_range_ns(struct qdisc_watchdog *wd, u64 expires, u64 delta_ns); static inline void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires) { … } static inline void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, psched_time_t expires) { … } void qdisc_watchdog_cancel(struct qdisc_watchdog *wd); extern struct Qdisc_ops pfifo_qdisc_ops; extern struct Qdisc_ops bfifo_qdisc_ops; extern struct Qdisc_ops pfifo_head_drop_qdisc_ops; int fifo_set_limit(struct Qdisc *q, unsigned int limit); struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops, unsigned int limit, struct netlink_ext_ack *extack); int register_qdisc(struct Qdisc_ops *qops); void unregister_qdisc(struct Qdisc_ops *qops); #define NET_SCH_ALIAS_PREFIX … #define MODULE_ALIAS_NET_SCH(id) … void qdisc_get_default(char *id, size_t len); int qdisc_set_default(const char *id); void qdisc_hash_add(struct Qdisc *q, bool invisible); void qdisc_hash_del(struct Qdisc *q); struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle); struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle); struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, struct nlattr *tab, struct netlink_ext_ack *extack); void qdisc_put_rtab(struct qdisc_rate_table *tab); void qdisc_put_stab(struct qdisc_size_table *tab); void qdisc_warn_nonwc(const char *txt, struct Qdisc *qdisc); bool sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q, struct net_device *dev, struct netdev_queue *txq, spinlock_t *root_lock, bool validate); void __qdisc_run(struct Qdisc *q); static inline void qdisc_run(struct Qdisc *q) { … } extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1]; /* Calculate maximal size of packet seen by hard_start_xmit routine of this device. */ static inline unsigned int psched_mtu(const struct net_device *dev) { … } static inline struct net *qdisc_net(struct Qdisc *q) { … } struct tc_query_caps_base { … }; struct tc_cbs_qopt_offload { … }; struct tc_etf_qopt_offload { … }; struct tc_mqprio_caps { … }; struct tc_mqprio_qopt_offload { … }; struct tc_taprio_caps { … }; enum tc_taprio_qopt_cmd { … }; /** * struct tc_taprio_qopt_stats - IEEE 802.1Qbv statistics * @window_drops: Frames that were dropped because they were too large to be * transmitted in any of the allotted time windows (open gates) for their * traffic class. * @tx_overruns: Frames still being transmitted by the MAC after the * transmission gate associated with their traffic class has closed. * Equivalent to `12.29.1.1.2 TransmissionOverrun` from 802.1Q-2018. */ struct tc_taprio_qopt_stats { … }; struct tc_taprio_qopt_queue_stats { … }; struct tc_taprio_sched_entry { … }; struct tc_taprio_qopt_offload { … }; #if IS_ENABLED(CONFIG_NET_SCH_TAPRIO) /* Reference counting */ struct tc_taprio_qopt_offload *taprio_offload_get(struct tc_taprio_qopt_offload *offload); void taprio_offload_free(struct tc_taprio_qopt_offload *offload); #else /* Reference counting */ static inline struct tc_taprio_qopt_offload * taprio_offload_get(struct tc_taprio_qopt_offload *offload) { return NULL; } static inline void taprio_offload_free(struct tc_taprio_qopt_offload *offload) { } #endif /* Ensure skb_mstamp_ns, which might have been populated with the txtime, is * not mistaken for a software timestamp, because this will otherwise prevent * the dispatch of hardware timestamps to the socket. */ static inline void skb_txtime_consumed(struct sk_buff *skb) { … } static inline bool tc_qdisc_stats_dump(struct Qdisc *sch, unsigned long cl, struct qdisc_walker *arg) { … } #endif
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