--- /dev/null
+#ifndef __NET_SCHED_GENERIC_H
+#define __NET_SCHED_GENERIC_H
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/pkt_sched.h>
+#include <linux/pkt_cls.h>
+#include <linux/percpu.h>
+#include <linux/dynamic_queue_limits.h>
+#include <net/gen_stats.h>
+#include <net/rtnetlink.h>
+
+struct Qdisc_ops;
+struct qdisc_walker;
+struct tcf_walker;
+struct module;
+
+struct qdisc_rate_table {
+ struct tc_ratespec rate;
+ u32 data[256];
+ struct qdisc_rate_table *next;
+ int refcnt;
+};
+
+enum qdisc_state_t {
+ __QDISC_STATE_SCHED,
+ __QDISC_STATE_DEACTIVATED,
+ __QDISC_STATE_THROTTLED,
+};
+
+/*
+ * following bits are only changed while qdisc lock is held
+ */
+enum qdisc___state_t {
+ __QDISC___STATE_RUNNING = 1,
+};
+
+struct qdisc_size_table {
+ struct rcu_head rcu;
+ struct list_head list;
+ struct tc_sizespec szopts;
+ int refcnt;
+ u16 data[];
+};
+
+struct Qdisc {
+ int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
+ struct sk_buff * (*dequeue)(struct Qdisc *dev);
+ unsigned int flags;
+#define TCQ_F_BUILTIN 1
+#define TCQ_F_INGRESS 2
+#define TCQ_F_CAN_BYPASS 4
+#define TCQ_F_MQROOT 8
+#define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for
+ * q->dev_queue : It can test
+ * netif_xmit_frozen_or_stopped() before
+ * dequeueing next packet.
+ * Its true for MQ/MQPRIO slaves, or non
+ * multiqueue device.
+ */
+#define TCQ_F_WARN_NONWC (1 << 16)
+#define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */
+ u32 limit;
+ const struct Qdisc_ops *ops;
+ struct qdisc_size_table __rcu *stab;
+ struct list_head list;
+ u32 handle;
+ u32 parent;
+ int (*reshape_fail)(struct sk_buff *skb,
+ struct Qdisc *q);
+
+ void *u32_node;
+
+ /* This field is deprecated, but it is still used by CBQ
+ * and it will live until better solution will be invented.
+ */
+ struct Qdisc *__parent;
+ struct netdev_queue *dev_queue;
+
+ struct gnet_stats_rate_est64 rate_est;
+ struct gnet_stats_basic_cpu __percpu *cpu_bstats;
+ struct gnet_stats_queue __percpu *cpu_qstats;
+
+ struct Qdisc *next_sched;
+ struct sk_buff *gso_skb;
+ /*
+ * For performance sake on SMP, we put highly modified fields at the end
+ */
+ unsigned long state;
+ struct sk_buff_head q;
+ struct gnet_stats_basic_packed bstats;
+ unsigned int __state;
+ struct gnet_stats_queue qstats;
+ struct rcu_head rcu_head;
+ int padded;
+ atomic_t refcnt;
+
+ spinlock_t busylock ____cacheline_aligned_in_smp;
+};
+
+static inline bool qdisc_is_running(const struct Qdisc *qdisc)
+{
+ return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false;
+}
+
+static inline bool qdisc_run_begin(struct Qdisc *qdisc)
+{
+ if (qdisc_is_running(qdisc))
+ return false;
+ qdisc->__state |= __QDISC___STATE_RUNNING;
+ return true;
+}
+
+static inline void qdisc_run_end(struct Qdisc *qdisc)
+{
+ qdisc->__state &= ~__QDISC___STATE_RUNNING;
+}
+
+static inline bool qdisc_may_bulk(const struct Qdisc *qdisc)
+{
+ return qdisc->flags & TCQ_F_ONETXQUEUE;
+}
+
+static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq)
+{
+#ifdef CONFIG_BQL
+ /* Non-BQL migrated drivers will return 0, too. */
+ return dql_avail(&txq->dql);
+#else
+ return 0;
+#endif
+}
+
+static inline bool qdisc_is_throttled(const struct Qdisc *qdisc)
+{
+ return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false;
+}
+
+static inline void qdisc_throttled(struct Qdisc *qdisc)
+{
+ set_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
+}
+
+static inline void qdisc_unthrottled(struct Qdisc *qdisc)
+{
+ clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
+}
+
+struct Qdisc_class_ops {
+ /* Child qdisc manipulation */
+ struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
+ int (*graft)(struct Qdisc *, unsigned long cl,
+ struct Qdisc *, struct Qdisc **);
+ struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
+ void (*qlen_notify)(struct Qdisc *, unsigned long);
+
+ /* Class manipulation routines */
+ unsigned long (*get)(struct Qdisc *, u32 classid);
+ void (*put)(struct Qdisc *, unsigned long);
+ int (*change)(struct Qdisc *, u32, u32,
+ struct nlattr **, unsigned long *);
+ int (*delete)(struct Qdisc *, unsigned long);
+ void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
+
+ /* Filter manipulation */
+ struct tcf_proto __rcu ** (*tcf_chain)(struct Qdisc *, unsigned long);
+ unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
+ u32 classid);
+ void (*unbind_tcf)(struct Qdisc *, unsigned long);
+
+ /* rtnetlink specific */
+ int (*dump)(struct Qdisc *, unsigned long,
+ struct sk_buff *skb, struct tcmsg*);
+ int (*dump_stats)(struct Qdisc *, unsigned long,
+ struct gnet_dump *);
+};
+
+struct Qdisc_ops {
+ struct Qdisc_ops *next;
+ const struct Qdisc_class_ops *cl_ops;
+ char id[IFNAMSIZ];
+ int priv_size;
+
+ int (*enqueue)(struct sk_buff *, struct Qdisc *);
+ struct sk_buff * (*dequeue)(struct Qdisc *);
+ struct sk_buff * (*peek)(struct Qdisc *);
+ unsigned int (*drop)(struct Qdisc *);
+
+ int (*init)(struct Qdisc *, struct nlattr *arg);
+ void (*reset)(struct Qdisc *);
+ void (*destroy)(struct Qdisc *);
+ int (*change)(struct Qdisc *, struct nlattr *arg);
+ void (*attach)(struct Qdisc *);
+
+ int (*dump)(struct Qdisc *, struct sk_buff *);
+ int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
+
+ struct module *owner;
+};
+
+
+struct tcf_result {
+ unsigned long class;
+ u32 classid;
+};
+
+struct tcf_proto_ops {
+ struct list_head head;
+ char kind[IFNAMSIZ];
+
+ int (*classify)(struct sk_buff *,
+ const struct tcf_proto *,
+ struct tcf_result *);
+ int (*init)(struct tcf_proto*);
+ bool (*destroy)(struct tcf_proto*, bool);
+
+ unsigned long (*get)(struct tcf_proto*, u32 handle);
+ int (*change)(struct net *net, struct sk_buff *,
+ struct tcf_proto*, unsigned long,
+ u32 handle, struct nlattr **,
+ unsigned long *, bool);
+ int (*delete)(struct tcf_proto*, unsigned long);
+ void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
+
+ /* rtnetlink specific */
+ int (*dump)(struct net*, struct tcf_proto*, unsigned long,
+ struct sk_buff *skb, struct tcmsg*);
+
+ struct module *owner;
+};
+
+struct tcf_proto {
+ /* Fast access part */
+ struct tcf_proto __rcu *next;
+ void __rcu *root;
+ int (*classify)(struct sk_buff *,
+ const struct tcf_proto *,
+ struct tcf_result *);
+ __be16 protocol;
+
+ /* All the rest */
+ u32 prio;
+ u32 classid;
+ struct Qdisc *q;
+ void *data;
+ const struct tcf_proto_ops *ops;
+ struct rcu_head rcu;
+};
+
+struct qdisc_skb_cb {
+ unsigned int pkt_len;
+ u16 slave_dev_queue_mapping;
+ u16 _pad;
+#define QDISC_CB_PRIV_LEN 20
+ unsigned char data[QDISC_CB_PRIV_LEN];
+};
+
+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) < offsetof(struct qdisc_skb_cb, data) + sz);
+ BUILD_BUG_ON(sizeof(qcb->data) < sz);
+}
+
+static inline int qdisc_qlen(const struct Qdisc *q)
+{
+ return q->q.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_sleeping(const struct Qdisc *qdisc)
+{
+ return qdisc->dev_queue->qdisc_sleeping;
+}
+
+/* The qdisc root lock is a mechanism by which to top level
+ * of a qdisc tree can be locked from any qdisc node in the
+ * forest. This allows changing the configuration of some
+ * aspect of the qdisc tree while blocking out asynchronous
+ * qdisc access in the packet processing paths.
+ *
+ * It is only legal to do this when the root will not change
+ * on us. Otherwise we'll potentially lock the wrong qdisc
+ * root. This is enforced by holding the RTNL semaphore, which
+ * all users of this lock accessor must do.
+ */
+static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc)
+{
+ struct Qdisc *root = qdisc_root(qdisc);
+
+ ASSERT_RTNL();
+ return qdisc_lock(root);
+}
+
+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(const struct Qdisc *q)
+{
+ spin_lock_bh(qdisc_root_sleeping_lock(q));
+}
+
+static inline void sch_tree_unlock(const struct Qdisc *q)
+{
+ spin_unlock_bh(qdisc_root_sleeping_lock(q));
+}
+
+#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
+#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
+
+extern struct Qdisc noop_qdisc;
+extern struct Qdisc_ops noop_qdisc_ops;
+extern struct Qdisc_ops pfifo_fast_ops;
+extern struct Qdisc_ops mq_qdisc_ops;
+extern const struct Qdisc_ops *default_qdisc_ops;
+
+struct Qdisc_class_common {
+ u32 classid;
+ 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;
+
+ h = qdisc_class_hash(id, hash->hashmask);
+ hlist_for_each_entry(cl, &hash->hash[h], hnode) {
+ if (cl->classid == id)
+ return cl;
+ }
+ return NULL;
+}
+
+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 *);
+
+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_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
+struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
+ const struct Qdisc_ops *ops);
+struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
+ const struct Qdisc_ops *ops, u32 parentid);
+void __qdisc_calculate_pkt_len(struct sk_buff *skb,
+ const struct qdisc_size_table *stab);
+bool tcf_destroy(struct tcf_proto *tp, bool force);
+void tcf_destroy_chain(struct tcf_proto __rcu **fl);
+
+/* Reset all TX qdiscs greater then 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));
+ }
+ }
+}
+
+static inline void qdisc_reset_all_tx(struct net_device *dev)
+{
+ qdisc_reset_all_tx_gt(dev, 0);
+}
+
+/* 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 (q->q.qlen) {
+ 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) != 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)
+{
+ qdisc_calculate_pkt_len(skb, sch);
+ return sch->enqueue(skb, sch);
+}
+
+static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch)
+{
+ qdisc_skb_cb(skb)->pkt_len = skb->len;
+ return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
+}
+
+static inline bool qdisc_is_percpu_stats(const struct Qdisc *q)
+{
+ return q->flags & TCQ_F_CPUSTATS;
+}
+
+static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
+ const struct sk_buff *skb)
+{
+ bstats->bytes += qdisc_pkt_len(skb);
+ bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
+}
+
+static inline void qdisc_bstats_update_cpu(struct Qdisc *sch,
+ const struct sk_buff *skb)
+{
+ struct gnet_stats_basic_cpu *bstats =
+ this_cpu_ptr(sch->cpu_bstats);
+
+ u64_stats_update_begin(&bstats->syncp);
+ bstats_update(&bstats->bstats, skb);
+ u64_stats_update_end(&bstats->syncp);
+}
+
+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_backlog_inc(struct Qdisc *sch,
+ const struct sk_buff *skb)
+{
+ sch->qstats.backlog += qdisc_pkt_len(skb);
+}
+
+static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count)
+{
+ sch->qstats.drops += count;
+}
+
+static inline void qdisc_qstats_drop(struct Qdisc *sch)
+{
+ sch->qstats.drops++;
+}
+
+static inline void qdisc_qstats_drop_cpu(struct Qdisc *sch)
+{
+ struct gnet_stats_queue *qstats = this_cpu_ptr(sch->cpu_qstats);
+
+ qstats->drops++;
+}
+
+static inline void qdisc_qstats_overlimit(struct Qdisc *sch)
+{
+ sch->qstats.overlimits++;
+}
+
+static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
+ struct sk_buff_head *list)
+{
+ __skb_queue_tail(list, skb);
+ qdisc_qstats_backlog_inc(sch, skb);
+
+ return NET_XMIT_SUCCESS;
+}
+
+static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
+{
+ return __qdisc_enqueue_tail(skb, sch, &sch->q);
+}
+
+static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
+ struct sk_buff_head *list)
+{
+ struct sk_buff *skb = __skb_dequeue(list);
+
+ if (likely(skb != NULL)) {
+ qdisc_qstats_backlog_dec(sch, skb);
+ qdisc_bstats_update(sch, skb);
+ }
+
+ return skb;
+}
+
+static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
+{
+ return __qdisc_dequeue_head(sch, &sch->q);
+}
+
+static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
+ struct sk_buff_head *list)
+{
+ struct sk_buff *skb = __skb_dequeue(list);
+
+ if (likely(skb != NULL)) {
+ unsigned int len = qdisc_pkt_len(skb);
+ qdisc_qstats_backlog_dec(sch, skb);
+ kfree_skb(skb);
+ return len;
+ }
+
+ return 0;
+}
+
+static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch)
+{
+ return __qdisc_queue_drop_head(sch, &sch->q);
+}
+
+static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
+ struct sk_buff_head *list)
+{
+ struct sk_buff *skb = __skb_dequeue_tail(list);
+
+ if (likely(skb != NULL))
+ qdisc_qstats_backlog_dec(sch, skb);
+
+ return skb;
+}
+
+static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
+{
+ return __qdisc_dequeue_tail(sch, &sch->q);
+}
+
+static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch)
+{
+ return skb_peek(&sch->q);
+}
+
+/* generic pseudo peek method for non-work-conserving qdisc */
+static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
+{
+ /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
+ if (!sch->gso_skb) {
+ sch->gso_skb = sch->dequeue(sch);
+ if (sch->gso_skb)
+ /* it's still part of the queue */
+ sch->q.qlen++;
+ }
+
+ return sch->gso_skb;
+}
+
+/* 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 = sch->gso_skb;
+
+ if (skb) {
+ sch->gso_skb = NULL;
+ sch->q.qlen--;
+ } else {
+ skb = sch->dequeue(sch);
+ }
+
+ return skb;
+}
+
+static inline void __qdisc_reset_queue(struct Qdisc *sch,
+ struct sk_buff_head *list)
+{
+ /*
+ * We do not know the backlog in bytes of this list, it
+ * is up to the caller to correct it
+ */
+ __skb_queue_purge(list);
+}
+
+static inline void qdisc_reset_queue(struct Qdisc *sch)
+{
+ __qdisc_reset_queue(sch, &sch->q);
+ sch->qstats.backlog = 0;
+}
+
+static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
+ struct sk_buff_head *list)
+{
+ struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
+
+ if (likely(skb != NULL)) {
+ unsigned int len = qdisc_pkt_len(skb);
+ kfree_skb(skb);
+ return len;
+ }
+
+ return 0;
+}
+
+static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
+{
+ return __qdisc_queue_drop(sch, &sch->q);
+}
+
+static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
+{
+ kfree_skb(skb);
+ qdisc_qstats_drop(sch);
+
+ return NET_XMIT_DROP;
+}
+
+static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
+{
+ qdisc_qstats_drop(sch);
+
+#ifdef CONFIG_NET_CLS_ACT
+ if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
+ goto drop;
+
+ return NET_XMIT_SUCCESS;
+
+drop:
+#endif
+ kfree_skb(skb);
+ return NET_XMIT_DROP;
+}
+
+/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
+ long it will take to send a packet given its size.
+ */
+static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
+{
+ int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
+ if (slot < 0)
+ slot = 0;
+ slot >>= rtab->rate.cell_log;
+ if (slot > 255)
+ return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
+ return rtab->data[slot];
+}
+
+#ifdef CONFIG_NET_CLS_ACT
+static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask,
+ int action)
+{
+ struct sk_buff *n;
+
+ n = skb_clone(skb, gfp_mask);
+
+ if (n) {
+ n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
+ n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
+ n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
+ }
+ return n;
+}
+#endif
+
+struct psched_ratecfg {
+ u64 rate_bytes_ps; /* bytes per second */
+ u32 mult;
+ u16 overhead;
+ u8 linklayer;
+ u8 shift;
+};
+
+static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
+ unsigned int len)
+{
+ len += r->overhead;
+
+ 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->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
+}
+
+#endif
Code Review / kvmfornfv.git / blobdiff