diff options
Diffstat (limited to 'include/net/sch_generic.h')
| -rw-r--r-- | include/net/sch_generic.h | 310 |
1 files changed, 233 insertions, 77 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index dad558bc06f..624f9857c83 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -4,7 +4,6 @@ #include <linux/netdevice.h> #include <linux/types.h> #include <linux/rcupdate.h> -#include <linux/module.h> #include <linux/pkt_sched.h> #include <linux/pkt_cls.h> #include <net/gen_stats.h> @@ -23,12 +22,20 @@ struct qdisc_rate_table { }; enum qdisc_state_t { - __QDISC_STATE_RUNNING, __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; @@ -38,21 +45,25 @@ struct qdisc_size_table { struct Qdisc { int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); struct sk_buff * (*dequeue)(struct Qdisc *dev); - unsigned flags; + unsigned int flags; #define TCQ_F_BUILTIN 1 -#define TCQ_F_THROTTLED 2 -#define TCQ_F_INGRESS 4 -#define TCQ_F_CAN_BYPASS 8 -#define TCQ_F_MQROOT 16 +#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) - int padded; - struct Qdisc_ops *ops; - struct qdisc_size_table *stab; + u32 limit; + const struct Qdisc_ops *ops; + struct qdisc_size_table __rcu *stab; struct list_head list; u32 handle; u32 parent; - atomic_t refcnt; - struct gnet_stats_rate_est rate_est; int (*reshape_fail)(struct sk_buff *skb, struct Qdisc *q); @@ -63,8 +74,9 @@ struct Qdisc { */ struct Qdisc *__parent; struct netdev_queue *dev_queue; - struct Qdisc *next_sched; + struct gnet_stats_rate_est64 rate_est; + struct Qdisc *next_sched; struct sk_buff *gso_skb; /* * For performance sake on SMP, we put highly modified fields at the end @@ -72,9 +84,48 @@ struct Qdisc { 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_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 *); @@ -134,24 +185,26 @@ struct tcf_result { }; struct tcf_proto_ops { - struct tcf_proto_ops *next; + struct list_head head; char kind[IFNAMSIZ]; - int (*classify)(struct sk_buff*, struct tcf_proto*, - struct tcf_result *); + int (*classify)(struct sk_buff *, + const struct tcf_proto *, + struct tcf_result *); int (*init)(struct tcf_proto*); void (*destroy)(struct tcf_proto*); unsigned long (*get)(struct tcf_proto*, u32 handle); void (*put)(struct tcf_proto*, unsigned long); - int (*change)(struct tcf_proto*, unsigned long, + int (*change)(struct net *net, struct sk_buff *, + struct tcf_proto*, unsigned long, u32 handle, struct nlattr **, - unsigned long *); + unsigned long *, bool); int (*delete)(struct tcf_proto*, unsigned long); void (*walk)(struct tcf_proto*, struct tcf_walker *arg); /* rtnetlink specific */ - int (*dump)(struct tcf_proto*, unsigned long, + int (*dump)(struct net*, struct tcf_proto*, unsigned long, struct sk_buff *skb, struct tcmsg*); struct module *owner; @@ -161,8 +214,9 @@ struct tcf_proto { /* Fast access part */ struct tcf_proto *next; void *root; - int (*classify)(struct sk_buff*, struct tcf_proto*, - struct tcf_result *); + int (*classify)(struct sk_buff *, + const struct tcf_proto *, + struct tcf_result *); __be16 protocol; /* All the rest */ @@ -170,20 +224,30 @@ struct tcf_proto { u32 classid; struct Qdisc *q; void *data; - struct tcf_proto_ops *ops; + const struct tcf_proto_ops *ops; }; struct qdisc_skb_cb { unsigned int pkt_len; - char data[]; + u16 slave_dev_queue_mapping; + u16 _pad; + unsigned char data[20]; }; -static inline int qdisc_qlen(struct Qdisc *q) +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(struct sk_buff *skb) +static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) { return (struct qdisc_skb_cb *)skb->cb; } @@ -193,12 +257,12 @@ static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) return &qdisc->q.lock; } -static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc) +static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) { return qdisc->dev_queue->qdisc; } -static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc) +static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) { return qdisc->dev_queue->qdisc_sleeping; } @@ -214,7 +278,7 @@ static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *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(struct Qdisc *qdisc) +static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) { struct Qdisc *root = qdisc_root(qdisc); @@ -222,7 +286,7 @@ static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc) return qdisc_lock(root); } -static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc) +static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) { struct Qdisc *root = qdisc_root_sleeping(qdisc); @@ -230,17 +294,17 @@ static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc) return qdisc_lock(root); } -static inline struct net_device *qdisc_dev(struct Qdisc *qdisc) +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) +static inline void sch_tree_lock(const struct Qdisc *q) { spin_lock_bh(qdisc_root_sleeping_lock(q)); } -static inline void sch_tree_unlock(struct Qdisc *q) +static inline void sch_tree_unlock(const struct Qdisc *q) { spin_unlock_bh(qdisc_root_sleeping_lock(q)); } @@ -252,6 +316,7 @@ 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; @@ -273,51 +338,64 @@ static inline unsigned int qdisc_class_hash(u32 id, u32 mask) } static inline struct Qdisc_class_common * -qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) +qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) { struct Qdisc_class_common *cl; - struct hlist_node *n; unsigned int h; h = qdisc_class_hash(id, hash->hashmask); - hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { + hlist_for_each_entry(cl, &hash->hash[h], hnode) { if (cl->classid == id) return cl; } return NULL; } -extern int qdisc_class_hash_init(struct Qdisc_class_hash *); -extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); -extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); -extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); -extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); - -extern void dev_init_scheduler(struct net_device *dev); -extern void dev_shutdown(struct net_device *dev); -extern void dev_activate(struct net_device *dev); -extern void dev_deactivate(struct net_device *dev); -extern struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, - struct Qdisc *qdisc); -extern void qdisc_reset(struct Qdisc *qdisc); -extern void qdisc_destroy(struct Qdisc *qdisc); -extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); -extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, - struct Qdisc_ops *ops); -extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, - struct netdev_queue *dev_queue, - struct Qdisc_ops *ops, u32 parentid); -extern void qdisc_calculate_pkt_len(struct sk_buff *skb, - struct qdisc_size_table *stab); -extern void tcf_destroy(struct tcf_proto *tp); -extern void tcf_destroy_chain(struct tcf_proto **fl); - -/* Reset all TX qdiscs of a device. */ +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); +void tcf_destroy(struct tcf_proto *tp); +void tcf_destroy_chain(struct tcf_proto **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 = 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) { - unsigned int i; - for (i = 0; i < dev->num_tx_queues; i++) - qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc); + qdisc_reset_all_tx_gt(dev, 0); } /* Are all TX queues of the device empty? */ @@ -335,7 +413,7 @@ static inline bool qdisc_all_tx_empty(const struct net_device *dev) } /* Are any of the TX qdiscs changing? */ -static inline bool qdisc_tx_changing(struct net_device *dev) +static inline bool qdisc_tx_changing(const struct net_device *dev) { unsigned int i; for (i = 0; i < dev->num_tx_queues; i++) { @@ -358,7 +436,7 @@ static inline bool qdisc_tx_is_noop(const struct net_device *dev) return true; } -static inline unsigned int qdisc_pkt_len(struct sk_buff *skb) +static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) { return qdisc_skb_cb(skb)->pkt_len; } @@ -375,12 +453,20 @@ enum net_xmit_qdisc_t { #define net_xmit_drop_count(e) (1) #endif -static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) +static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, + const struct Qdisc *sch) { #ifdef CONFIG_NET_SCHED - if (sch->stab) - qdisc_calculate_pkt_len(skb, sch->stab); + 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); } @@ -390,10 +476,18 @@ static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; } -static inline void __qdisc_update_bstats(struct Qdisc *sch, unsigned int len) + +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(struct Qdisc *sch, + const struct sk_buff *skb) { - sch->bstats.bytes += len; - sch->bstats.packets++; + bstats_update(&sch->bstats, skb); } static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, @@ -401,7 +495,6 @@ static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, { __skb_queue_tail(list, skb); sch->qstats.backlog += qdisc_pkt_len(skb); - __qdisc_update_bstats(sch, qdisc_pkt_len(skb)); return NET_XMIT_SUCCESS; } @@ -416,8 +509,10 @@ static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, { struct sk_buff *skb = __skb_dequeue(list); - if (likely(skb != NULL)) + if (likely(skb != NULL)) { sch->qstats.backlog -= qdisc_pkt_len(skb); + qdisc_bstats_update(sch, skb); + } return skb; } @@ -427,6 +522,26 @@ 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); + sch->qstats.backlog -= len; + 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) { @@ -546,14 +661,17 @@ static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) slot = 0; slot >>= rtab->rate.cell_log; if (slot > 255) - return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); + 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) +static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, + int action) { - struct sk_buff *n = skb_clone(skb, gfp_mask); + struct sk_buff *n; + + n = skb_clone(skb, gfp_mask); if (n) { n->tc_verd = SET_TC_VERD(n->tc_verd, 0); @@ -564,4 +682,42 @@ static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) } #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 |