-/* vim: ts=8 sw=8
+/*
* net/sched/sch_htb.c Hierarchical token bucket, feed tree version
*
* This program is free software; you can redistribute it and/or
one less than their parent.
*/
-#define HTB_HSIZE 16 /* classid hash size */
-#define HTB_EWMAC 2 /* rate average over HTB_EWMAC*HTB_HSIZE sec */
-#define HTB_RATECM 1 /* whether to use rate computer */
-#define HTB_HYSTERESIS 1/* whether to use mode hysteresis for speedup */
-#define HTB_VER 0x30011 /* major must be matched with number suplied by TC as version */
+#define HTB_HSIZE 16 /* classid hash size */
+#define HTB_EWMAC 2 /* rate average over HTB_EWMAC*HTB_HSIZE sec */
+#define HTB_RATECM 1 /* whether to use rate computer */
+#define HTB_HYSTERESIS 1 /* whether to use mode hysteresis for speedup */
+#define HTB_VER 0x30011 /* major must be matched with number suplied by TC as version */
#if HTB_VER >> 16 != TC_HTB_PROTOVER
#error "Mismatched sch_htb.c and pkt_sch.h"
/* used internaly to keep status of single class */
enum htb_cmode {
- HTB_CANT_SEND, /* class can't send and can't borrow */
- HTB_MAY_BORROW, /* class can't send but may borrow */
- HTB_CAN_SEND /* class can send */
+ HTB_CANT_SEND, /* class can't send and can't borrow */
+ HTB_MAY_BORROW, /* class can't send but may borrow */
+ HTB_CAN_SEND /* class can send */
};
/* interior & leaf nodes; props specific to leaves are marked L: */
-struct htb_class
-{
- /* general class parameters */
- u32 classid;
- struct gnet_stats_basic bstats;
- struct gnet_stats_queue qstats;
- struct gnet_stats_rate_est rate_est;
- struct tc_htb_xstats xstats;/* our special stats */
- int refcnt; /* usage count of this class */
+struct htb_class {
+ /* general class parameters */
+ u32 classid;
+ struct gnet_stats_basic bstats;
+ struct gnet_stats_queue qstats;
+ struct gnet_stats_rate_est rate_est;
+ struct tc_htb_xstats xstats; /* our special stats */
+ int refcnt; /* usage count of this class */
#ifdef HTB_RATECM
- /* rate measurement counters */
- unsigned long rate_bytes,sum_bytes;
- unsigned long rate_packets,sum_packets;
+ /* rate measurement counters */
+ unsigned long rate_bytes, sum_bytes;
+ unsigned long rate_packets, sum_packets;
#endif
- /* topology */
- int level; /* our level (see above) */
- struct htb_class *parent; /* parent class */
- struct list_head hlist; /* classid hash list item */
- struct list_head sibling; /* sibling list item */
- struct list_head children; /* children list */
-
- union {
- struct htb_class_leaf {
- struct Qdisc *q;
- int prio;
- int aprio;
- int quantum;
- int deficit[TC_HTB_MAXDEPTH];
- struct list_head drop_list;
- } leaf;
- struct htb_class_inner {
- struct rb_root feed[TC_HTB_NUMPRIO]; /* feed trees */
- struct rb_node *ptr[TC_HTB_NUMPRIO]; /* current class ptr */
- /* When class changes from state 1->2 and disconnects from
- parent's feed then we lost ptr value and start from the
- first child again. Here we store classid of the
- last valid ptr (used when ptr is NULL). */
- u32 last_ptr_id[TC_HTB_NUMPRIO];
- } inner;
- } un;
- struct rb_node node[TC_HTB_NUMPRIO]; /* node for self or feed tree */
- struct rb_node pq_node; /* node for event queue */
- unsigned long pq_key; /* the same type as jiffies global */
-
- int prio_activity; /* for which prios are we active */
- enum htb_cmode cmode; /* current mode of the class */
-
- /* class attached filters */
- struct tcf_proto *filter_list;
- int filter_cnt;
-
- int warned; /* only one warning about non work conserving .. */
-
- /* token bucket parameters */
- struct qdisc_rate_table *rate; /* rate table of the class itself */
- struct qdisc_rate_table *ceil; /* ceiling rate (limits borrows too) */
- long buffer,cbuffer; /* token bucket depth/rate */
- psched_tdiff_t mbuffer; /* max wait time */
- long tokens,ctokens; /* current number of tokens */
- psched_time_t t_c; /* checkpoint time */
+ /* topology */
+ int level; /* our level (see above) */
+ struct htb_class *parent; /* parent class */
+ struct list_head hlist; /* classid hash list item */
+ struct list_head sibling; /* sibling list item */
+ struct list_head children; /* children list */
+
+ union {
+ struct htb_class_leaf {
+ struct Qdisc *q;
+ int prio;
+ int aprio;
+ int quantum;
+ int deficit[TC_HTB_MAXDEPTH];
+ struct list_head drop_list;
+ } leaf;
+ struct htb_class_inner {
+ struct rb_root feed[TC_HTB_NUMPRIO]; /* feed trees */
+ struct rb_node *ptr[TC_HTB_NUMPRIO]; /* current class ptr */
+ /* When class changes from state 1->2 and disconnects from
+ parent's feed then we lost ptr value and start from the
+ first child again. Here we store classid of the
+ last valid ptr (used when ptr is NULL). */
+ u32 last_ptr_id[TC_HTB_NUMPRIO];
+ } inner;
+ } un;
+ struct rb_node node[TC_HTB_NUMPRIO]; /* node for self or feed tree */
+ struct rb_node pq_node; /* node for event queue */
+ unsigned long pq_key; /* the same type as jiffies global */
+
+ int prio_activity; /* for which prios are we active */
+ enum htb_cmode cmode; /* current mode of the class */
+
+ /* class attached filters */
+ struct tcf_proto *filter_list;
+ int filter_cnt;
+
+ int warned; /* only one warning about non work conserving .. */
+
+ /* token bucket parameters */
+ struct qdisc_rate_table *rate; /* rate table of the class itself */
+ struct qdisc_rate_table *ceil; /* ceiling rate (limits borrows too) */
+ long buffer, cbuffer; /* token bucket depth/rate */
+ psched_tdiff_t mbuffer; /* max wait time */
+ long tokens, ctokens; /* current number of tokens */
+ psched_time_t t_c; /* checkpoint time */
};
/* TODO: maybe compute rate when size is too large .. or drop ? */
-static __inline__ long L2T(struct htb_class *cl,struct qdisc_rate_table *rate,
- int size)
-{
- int slot = size >> rate->rate.cell_log;
- if (slot > 255) {
- cl->xstats.giants++;
- slot = 255;
- }
- return rate->data[slot];
+static inline long L2T(struct htb_class *cl, struct qdisc_rate_table *rate,
+ int size)
+{
+ int slot = size >> rate->rate.cell_log;
+ if (slot > 255) {
+ cl->xstats.giants++;
+ slot = 255;
+ }
+ return rate->data[slot];
}
-struct htb_sched
-{
- struct list_head root; /* root classes list */
- struct list_head hash[HTB_HSIZE]; /* hashed by classid */
- struct list_head drops[TC_HTB_NUMPRIO]; /* active leaves (for drops) */
-
- /* self list - roots of self generating tree */
- struct rb_root row[TC_HTB_MAXDEPTH][TC_HTB_NUMPRIO];
- int row_mask[TC_HTB_MAXDEPTH];
- struct rb_node *ptr[TC_HTB_MAXDEPTH][TC_HTB_NUMPRIO];
- u32 last_ptr_id[TC_HTB_MAXDEPTH][TC_HTB_NUMPRIO];
+struct htb_sched {
+ struct list_head root; /* root classes list */
+ struct list_head hash[HTB_HSIZE]; /* hashed by classid */
+ struct list_head drops[TC_HTB_NUMPRIO]; /* active leaves (for drops) */
+
+ /* self list - roots of self generating tree */
+ struct rb_root row[TC_HTB_MAXDEPTH][TC_HTB_NUMPRIO];
+ int row_mask[TC_HTB_MAXDEPTH];
+ struct rb_node *ptr[TC_HTB_MAXDEPTH][TC_HTB_NUMPRIO];
+ u32 last_ptr_id[TC_HTB_MAXDEPTH][TC_HTB_NUMPRIO];
- /* self wait list - roots of wait PQs per row */
- struct rb_root wait_pq[TC_HTB_MAXDEPTH];
+ /* self wait list - roots of wait PQs per row */
+ struct rb_root wait_pq[TC_HTB_MAXDEPTH];
- /* time of nearest event per level (row) */
- unsigned long near_ev_cache[TC_HTB_MAXDEPTH];
+ /* time of nearest event per level (row) */
+ unsigned long near_ev_cache[TC_HTB_MAXDEPTH];
- /* cached value of jiffies in dequeue */
- unsigned long jiffies;
+ /* cached value of jiffies in dequeue */
+ unsigned long jiffies;
- /* whether we hit non-work conserving class during this dequeue; we use */
- int nwc_hit; /* this to disable mindelay complaint in dequeue */
+ /* whether we hit non-work conserving class during this dequeue; we use */
+ int nwc_hit; /* this to disable mindelay complaint in dequeue */
- int defcls; /* class where unclassified flows go to */
+ int defcls; /* class where unclassified flows go to */
- /* filters for qdisc itself */
- struct tcf_proto *filter_list;
- int filter_cnt;
+ /* filters for qdisc itself */
+ struct tcf_proto *filter_list;
+ int filter_cnt;
- int rate2quantum; /* quant = rate / rate2quantum */
- psched_time_t now; /* cached dequeue time */
- struct timer_list timer; /* send delay timer */
+ int rate2quantum; /* quant = rate / rate2quantum */
+ psched_time_t now; /* cached dequeue time */
+ struct timer_list timer; /* send delay timer */
#ifdef HTB_RATECM
- struct timer_list rttim; /* rate computer timer */
- int recmp_bucket; /* which hash bucket to recompute next */
+ struct timer_list rttim; /* rate computer timer */
+ int recmp_bucket; /* which hash bucket to recompute next */
#endif
-
- /* non shaped skbs; let them go directly thru */
- struct sk_buff_head direct_queue;
- int direct_qlen; /* max qlen of above */
- long direct_pkts;
+ /* non shaped skbs; let them go directly thru */
+ struct sk_buff_head direct_queue;
+ int direct_qlen; /* max qlen of above */
+
+ long direct_pkts;
};
/* compute hash of size HTB_HSIZE for given handle */
-static __inline__ int htb_hash(u32 h)
+static inline int htb_hash(u32 h)
{
#if HTB_HSIZE != 16
- #error "Declare new hash for your HTB_HSIZE"
+#error "Declare new hash for your HTB_HSIZE"
#endif
- h ^= h>>8; /* stolen from cbq_hash */
- h ^= h>>4;
- return h & 0xf;
+ h ^= h >> 8; /* stolen from cbq_hash */
+ h ^= h >> 4;
+ return h & 0xf;
}
/* find class in global hash table using given handle */
-static __inline__ struct htb_class *htb_find(u32 handle, struct Qdisc *sch)
+static inline struct htb_class *htb_find(u32 handle, struct Qdisc *sch)
{
struct htb_sched *q = qdisc_priv(sch);
struct list_head *p;
- if (TC_H_MAJ(handle) != sch->handle)
+ if (TC_H_MAJ(handle) != sch->handle)
return NULL;
-
- list_for_each (p,q->hash+htb_hash(handle)) {
- struct htb_class *cl = list_entry(p,struct htb_class,hlist);
+
+ list_for_each(p, q->hash + htb_hash(handle)) {
+ struct htb_class *cl = list_entry(p, struct htb_class, hlist);
if (cl->classid == handle)
return cl;
}
return (cl && cl != HTB_DIRECT) ? cl->classid : TC_H_UNSPEC;
}
-static struct htb_class *htb_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
+static struct htb_class *htb_classify(struct sk_buff *skb, struct Qdisc *sch,
+ int *qerr)
{
struct htb_sched *q = qdisc_priv(sch);
struct htb_class *cl;
note that nfmark can be used too by attaching filter fw with no
rules in it */
if (skb->priority == sch->handle)
- return HTB_DIRECT; /* X:0 (direct flow) selected */
- if ((cl = htb_find(skb->priority,sch)) != NULL && cl->level == 0)
+ return HTB_DIRECT; /* X:0 (direct flow) selected */
+ if ((cl = htb_find(skb->priority, sch)) != NULL && cl->level == 0)
return cl;
*qerr = NET_XMIT_BYPASS;
#ifdef CONFIG_NET_CLS_ACT
switch (result) {
case TC_ACT_QUEUED:
- case TC_ACT_STOLEN:
+ case TC_ACT_STOLEN:
*qerr = NET_XMIT_SUCCESS;
case TC_ACT_SHOT:
return NULL;
if (result == TC_POLICE_SHOT)
return HTB_DIRECT;
#endif
- if ((cl = (void*)res.class) == NULL) {
+ if ((cl = (void *)res.class) == NULL) {
if (res.classid == sch->handle)
- return HTB_DIRECT; /* X:0 (direct flow) */
- if ((cl = htb_find(res.classid,sch)) == NULL)
- break; /* filter selected invalid classid */
+ return HTB_DIRECT; /* X:0 (direct flow) */
+ if ((cl = htb_find(res.classid, sch)) == NULL)
+ break; /* filter selected invalid classid */
}
if (!cl->level)
- return cl; /* we hit leaf; return it */
+ return cl; /* we hit leaf; return it */
/* we have got inner class; apply inner filter chain */
tcf = cl->filter_list;
}
/* classification failed; try to use default class */
- cl = htb_find(TC_H_MAKE(TC_H_MAJ(sch->handle),q->defcls),sch);
+ cl = htb_find(TC_H_MAKE(TC_H_MAJ(sch->handle), q->defcls), sch);
if (!cl || cl->level)
- return HTB_DIRECT; /* bad default .. this is safe bet */
+ return HTB_DIRECT; /* bad default .. this is safe bet */
return cl;
}
* Routine adds class to the list (actually tree) sorted by classid.
* Make sure that class is not already on such list for given prio.
*/
-static void htb_add_to_id_tree (struct rb_root *root,
- struct htb_class *cl,int prio)
+static void htb_add_to_id_tree(struct rb_root *root,
+ struct htb_class *cl, int prio)
{
struct rb_node **p = &root->rb_node, *parent = NULL;
while (*p) {
- struct htb_class *c; parent = *p;
+ struct htb_class *c;
+ parent = *p;
c = rb_entry(parent, struct htb_class, node[prio]);
if (cl->classid > c->classid)
p = &parent->rb_right;
- else
+ else
p = &parent->rb_left;
}
rb_link_node(&cl->node[prio], parent, p);
* change its mode in cl->pq_key microseconds. Make sure that class is not
* already in the queue.
*/
-static void htb_add_to_wait_tree (struct htb_sched *q,
- struct htb_class *cl,long delay)
+static void htb_add_to_wait_tree(struct htb_sched *q,
+ struct htb_class *cl, long delay)
{
struct rb_node **p = &q->wait_pq[cl->level].rb_node, *parent = NULL;
/* update the nearest event cache */
if (time_after(q->near_ev_cache[cl->level], cl->pq_key))
q->near_ev_cache[cl->level] = cl->pq_key;
-
+
while (*p) {
- struct htb_class *c; parent = *p;
+ struct htb_class *c;
+ parent = *p;
c = rb_entry(parent, struct htb_class, pq_node);
if (time_after_eq(cl->pq_key, c->pq_key))
p = &parent->rb_right;
- else
+ else
p = &parent->rb_left;
}
rb_link_node(&cl->pq_node, parent, p);
* The class is added to row at priorities marked in mask.
* It does nothing if mask == 0.
*/
-static inline void htb_add_class_to_row(struct htb_sched *q,
- struct htb_class *cl,int mask)
+static inline void htb_add_class_to_row(struct htb_sched *q,
+ struct htb_class *cl, int mask)
{
q->row_mask[cl->level] |= mask;
while (mask) {
int prio = ffz(~mask);
mask &= ~(1 << prio);
- htb_add_to_id_tree(q->row[cl->level]+prio,cl,prio);
+ htb_add_to_id_tree(q->row[cl->level] + prio, cl, prio);
}
}
* The class is removed from row at priorities marked in mask.
* It does nothing if mask == 0.
*/
-static __inline__ void htb_remove_class_from_row(struct htb_sched *q,
- struct htb_class *cl,int mask)
+static inline void htb_remove_class_from_row(struct htb_sched *q,
+ struct htb_class *cl, int mask)
{
int m = 0;
while (mask) {
int prio = ffz(~mask);
mask &= ~(1 << prio);
- if (q->ptr[cl->level][prio] == cl->node+prio)
- htb_next_rb_node(q->ptr[cl->level]+prio);
- rb_erase(cl->node + prio,q->row[cl->level]+prio);
- if (!q->row[cl->level][prio].rb_node)
+ if (q->ptr[cl->level][prio] == cl->node + prio)
+ htb_next_rb_node(q->ptr[cl->level] + prio);
+ rb_erase(cl->node + prio, q->row[cl->level] + prio);
+ if (!q->row[cl->level][prio].rb_node)
m |= 1 << prio;
}
q->row_mask[cl->level] &= ~m;
* for priorities it is participating on. cl->cmode must be new
* (activated) mode. It does nothing if cl->prio_activity == 0.
*/
-static void htb_activate_prios(struct htb_sched *q,struct htb_class *cl)
+static void htb_activate_prios(struct htb_sched *q, struct htb_class *cl)
{
struct htb_class *p = cl->parent;
- long m,mask = cl->prio_activity;
+ long m, mask = cl->prio_activity;
while (cl->cmode == HTB_MAY_BORROW && p && mask) {
-
- m = mask; while (m) {
+ m = mask;
+ while (m) {
int prio = ffz(~m);
m &= ~(1 << prio);
-
+
if (p->un.inner.feed[prio].rb_node)
/* parent already has its feed in use so that
reset bit in mask as parent is already ok */
mask &= ~(1 << prio);
-
- htb_add_to_id_tree(p->un.inner.feed+prio,cl,prio);
+
+ htb_add_to_id_tree(p->un.inner.feed + prio, cl, prio);
}
p->prio_activity |= mask;
- cl = p; p = cl->parent;
+ cl = p;
+ p = cl->parent;
}
if (cl->cmode == HTB_CAN_SEND && mask)
- htb_add_class_to_row(q,cl,mask);
+ htb_add_class_to_row(q, cl, mask);
}
/**
static void htb_deactivate_prios(struct htb_sched *q, struct htb_class *cl)
{
struct htb_class *p = cl->parent;
- long m,mask = cl->prio_activity;
-
+ long m, mask = cl->prio_activity;
while (cl->cmode == HTB_MAY_BORROW && p && mask) {
- m = mask; mask = 0;
+ m = mask;
+ mask = 0;
while (m) {
int prio = ffz(~m);
m &= ~(1 << prio);
-
- if (p->un.inner.ptr[prio] == cl->node+prio) {
+
+ if (p->un.inner.ptr[prio] == cl->node + prio) {
/* we are removing child which is pointed to from
parent feed - forget the pointer but remember
classid */
p->un.inner.last_ptr_id[prio] = cl->classid;
p->un.inner.ptr[prio] = NULL;
}
-
- rb_erase(cl->node + prio,p->un.inner.feed + prio);
-
- if (!p->un.inner.feed[prio].rb_node)
+
+ rb_erase(cl->node + prio, p->un.inner.feed + prio);
+
+ if (!p->un.inner.feed[prio].rb_node)
mask |= 1 << prio;
}
p->prio_activity &= ~mask;
- cl = p; p = cl->parent;
+ cl = p;
+ p = cl->parent;
}
- if (cl->cmode == HTB_CAN_SEND && mask)
- htb_remove_class_from_row(q,cl,mask);
+ if (cl->cmode == HTB_CAN_SEND && mask)
+ htb_remove_class_from_row(q, cl, mask);
}
#if HTB_HYSTERESIS
* 0 .. -cl->{c,}buffer range. It is meant to limit number of
* mode transitions per time unit. The speed gain is about 1/6.
*/
-static __inline__ enum htb_cmode
-htb_class_mode(struct htb_class *cl,long *diff)
+static inline enum htb_cmode
+htb_class_mode(struct htb_class *cl, long *diff)
{
- long toks;
+ long toks;
- if ((toks = (cl->ctokens + *diff)) < htb_lowater(cl)) {
- *diff = -toks;
- return HTB_CANT_SEND;
- }
+ if ((toks = (cl->ctokens + *diff)) < htb_lowater(cl)) {
+ *diff = -toks;
+ return HTB_CANT_SEND;
+ }
- if ((toks = (cl->tokens + *diff)) >= htb_hiwater(cl))
- return HTB_CAN_SEND;
+ if ((toks = (cl->tokens + *diff)) >= htb_hiwater(cl))
+ return HTB_CAN_SEND;
- *diff = -toks;
- return HTB_MAY_BORROW;
+ *diff = -toks;
+ return HTB_MAY_BORROW;
}
/**
* be different from old one and cl->pq_key has to be valid if changing
* to mode other than HTB_CAN_SEND (see htb_add_to_wait_tree).
*/
-static void
+static void
htb_change_class_mode(struct htb_sched *q, struct htb_class *cl, long *diff)
-{
- enum htb_cmode new_mode = htb_class_mode(cl,diff);
-
+{
+ enum htb_cmode new_mode = htb_class_mode(cl, diff);
if (new_mode == cl->cmode)
- return;
-
- if (cl->prio_activity) { /* not necessary: speed optimization */
- if (cl->cmode != HTB_CANT_SEND)
- htb_deactivate_prios(q,cl);
+ return;
+
+ if (cl->prio_activity) { /* not necessary: speed optimization */
+ if (cl->cmode != HTB_CANT_SEND)
+ htb_deactivate_prios(q, cl);
cl->cmode = new_mode;
- if (new_mode != HTB_CANT_SEND)
- htb_activate_prios(q,cl);
- } else
+ if (new_mode != HTB_CANT_SEND)
+ htb_activate_prios(q, cl);
+ } else
cl->cmode = new_mode;
}
* for the prio. It can be called on already active leaf safely.
* It also adds leaf into droplist.
*/
-static __inline__ void htb_activate(struct htb_sched *q,struct htb_class *cl)
+static inline void htb_activate(struct htb_sched *q, struct htb_class *cl)
{
BUG_TRAP(!cl->level && cl->un.leaf.q && cl->un.leaf.q->q.qlen);
if (!cl->prio_activity) {
cl->prio_activity = 1 << (cl->un.leaf.aprio = cl->un.leaf.prio);
- htb_activate_prios(q,cl);
- list_add_tail(&cl->un.leaf.drop_list,q->drops+cl->un.leaf.aprio);
+ htb_activate_prios(q, cl);
+ list_add_tail(&cl->un.leaf.drop_list,
+ q->drops + cl->un.leaf.aprio);
}
}
* Make sure that leaf is active. In the other words it can't be called
* with non-active leaf. It also removes class from the drop list.
*/
-static __inline__ void
-htb_deactivate(struct htb_sched *q,struct htb_class *cl)
+static inline void htb_deactivate(struct htb_sched *q, struct htb_class *cl)
{
BUG_TRAP(cl->prio_activity);
- htb_deactivate_prios(q,cl);
+ htb_deactivate_prios(q, cl);
cl->prio_activity = 0;
list_del_init(&cl->un.leaf.drop_list);
}
static int htb_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
- int ret;
- struct htb_sched *q = qdisc_priv(sch);
- struct htb_class *cl = htb_classify(skb,sch,&ret);
-
- if (cl == HTB_DIRECT) {
- /* enqueue to helper queue */
- if (q->direct_queue.qlen < q->direct_qlen) {
- __skb_queue_tail(&q->direct_queue, skb);
- q->direct_pkts++;
- } else {
- kfree_skb(skb);
- sch->qstats.drops++;
- return NET_XMIT_DROP;
- }
+ int ret;
+ struct htb_sched *q = qdisc_priv(sch);
+ struct htb_class *cl = htb_classify(skb, sch, &ret);
+
+ if (cl == HTB_DIRECT) {
+ /* enqueue to helper queue */
+ if (q->direct_queue.qlen < q->direct_qlen) {
+ __skb_queue_tail(&q->direct_queue, skb);
+ q->direct_pkts++;
+ } else {
+ kfree_skb(skb);
+ sch->qstats.drops++;
+ return NET_XMIT_DROP;
+ }
#ifdef CONFIG_NET_CLS_ACT
- } else if (!cl) {
- if (ret == NET_XMIT_BYPASS)
- sch->qstats.drops++;
- kfree_skb (skb);
- return ret;
+ } else if (!cl) {
+ if (ret == NET_XMIT_BYPASS)
+ sch->qstats.drops++;
+ kfree_skb(skb);
+ return ret;
#endif
- } else if (cl->un.leaf.q->enqueue(skb, cl->un.leaf.q) != NET_XMIT_SUCCESS) {
- sch->qstats.drops++;
- cl->qstats.drops++;
- return NET_XMIT_DROP;
- } else {
- cl->bstats.packets++; cl->bstats.bytes += skb->len;
- htb_activate (q,cl);
- }
-
- sch->q.qlen++;
- sch->bstats.packets++; sch->bstats.bytes += skb->len;
- return NET_XMIT_SUCCESS;
+ } else if (cl->un.leaf.q->enqueue(skb, cl->un.leaf.q) !=
+ NET_XMIT_SUCCESS) {
+ sch->qstats.drops++;
+ cl->qstats.drops++;
+ return NET_XMIT_DROP;
+ } else {
+ cl->bstats.packets++;
+ cl->bstats.bytes += skb->len;
+ htb_activate(q, cl);
+ }
+
+ sch->q.qlen++;
+ sch->bstats.packets++;
+ sch->bstats.bytes += skb->len;
+ return NET_XMIT_SUCCESS;
}
/* TODO: requeuing packet charges it to policers again !! */
static int htb_requeue(struct sk_buff *skb, struct Qdisc *sch)
{
- struct htb_sched *q = qdisc_priv(sch);
- int ret = NET_XMIT_SUCCESS;
- struct htb_class *cl = htb_classify(skb,sch, &ret);
- struct sk_buff *tskb;
-
- if (cl == HTB_DIRECT || !cl) {
- /* enqueue to helper queue */
- if (q->direct_queue.qlen < q->direct_qlen && cl) {
- __skb_queue_head(&q->direct_queue, skb);
- } else {
- __skb_queue_head(&q->direct_queue, skb);
- tskb = __skb_dequeue_tail(&q->direct_queue);
- kfree_skb (tskb);
- sch->qstats.drops++;
- return NET_XMIT_CN;
- }
- } else if (cl->un.leaf.q->ops->requeue(skb, cl->un.leaf.q) != NET_XMIT_SUCCESS) {
- sch->qstats.drops++;
- cl->qstats.drops++;
- return NET_XMIT_DROP;
- } else
- htb_activate (q,cl);
-
- sch->q.qlen++;
- sch->qstats.requeues++;
- return NET_XMIT_SUCCESS;
+ struct htb_sched *q = qdisc_priv(sch);
+ int ret = NET_XMIT_SUCCESS;
+ struct htb_class *cl = htb_classify(skb, sch, &ret);
+ struct sk_buff *tskb;
+
+ if (cl == HTB_DIRECT || !cl) {
+ /* enqueue to helper queue */
+ if (q->direct_queue.qlen < q->direct_qlen && cl) {
+ __skb_queue_head(&q->direct_queue, skb);
+ } else {
+ __skb_queue_head(&q->direct_queue, skb);
+ tskb = __skb_dequeue_tail(&q->direct_queue);
+ kfree_skb(tskb);
+ sch->qstats.drops++;
+ return NET_XMIT_CN;
+ }
+ } else if (cl->un.leaf.q->ops->requeue(skb, cl->un.leaf.q) !=
+ NET_XMIT_SUCCESS) {
+ sch->qstats.drops++;
+ cl->qstats.drops++;
+ return NET_XMIT_DROP;
+ } else
+ htb_activate(q, cl);
+
+ sch->q.qlen++;
+ sch->qstats.requeues++;
+ return NET_XMIT_SUCCESS;
}
static void htb_timer(unsigned long arg)
{
- struct Qdisc *sch = (struct Qdisc*)arg;
- sch->flags &= ~TCQ_F_THROTTLED;
- wmb();
- netif_schedule(sch->dev);
+ struct Qdisc *sch = (struct Qdisc *)arg;
+ sch->flags &= ~TCQ_F_THROTTLED;
+ wmb();
+ netif_schedule(sch->dev);
}
#ifdef HTB_RATECM
#define RT_GEN(D,R) R+=D-(R/HTB_EWMAC);D=0
static void htb_rate_timer(unsigned long arg)
{
- struct Qdisc *sch = (struct Qdisc*)arg;
+ struct Qdisc *sch = (struct Qdisc *)arg;
struct htb_sched *q = qdisc_priv(sch);
struct list_head *p;
add_timer(&q->rttim);
/* scan and recompute one bucket at time */
- if (++q->recmp_bucket >= HTB_HSIZE)
+ if (++q->recmp_bucket >= HTB_HSIZE)
q->recmp_bucket = 0;
- list_for_each (p,q->hash+q->recmp_bucket) {
- struct htb_class *cl = list_entry(p,struct htb_class,hlist);
+ list_for_each(p, q->hash + q->recmp_bucket) {
+ struct htb_class *cl = list_entry(p, struct htb_class, hlist);
- RT_GEN (cl->sum_bytes,cl->rate_bytes);
- RT_GEN (cl->sum_packets,cl->rate_packets);
+ RT_GEN(cl->sum_bytes, cl->rate_bytes);
+ RT_GEN(cl->sum_packets, cl->rate_packets);
}
spin_unlock_bh(&sch->dev->queue_lock);
}
* CAN_SEND) because we can use more precise clock that event queue here.
* In such case we remove class from event queue first.
*/
-static void htb_charge_class(struct htb_sched *q,struct htb_class *cl,
- int level,int bytes)
-{
- long toks,diff;
+static void htb_charge_class(struct htb_sched *q, struct htb_class *cl,
+ int level, int bytes)
+{
+ long toks, diff;
enum htb_cmode old_mode;
#define HTB_ACCNT(T,B,R) toks = diff + cl->T; \
cl->T = toks
while (cl) {
- diff = PSCHED_TDIFF_SAFE(q->now, cl->t_c, (u32)cl->mbuffer);
+ diff = PSCHED_TDIFF_SAFE(q->now, cl->t_c, (u32) cl->mbuffer);
if (cl->level >= level) {
- if (cl->level == level) cl->xstats.lends++;
- HTB_ACCNT (tokens,buffer,rate);
+ if (cl->level == level)
+ cl->xstats.lends++;
+ HTB_ACCNT(tokens, buffer, rate);
} else {
cl->xstats.borrows++;
- cl->tokens += diff; /* we moved t_c; update tokens */
+ cl->tokens += diff; /* we moved t_c; update tokens */
}
- HTB_ACCNT (ctokens,cbuffer,ceil);
+ HTB_ACCNT(ctokens, cbuffer, ceil);
cl->t_c = q->now;
- old_mode = cl->cmode; diff = 0;
- htb_change_class_mode(q,cl,&diff);
+ old_mode = cl->cmode;
+ diff = 0;
+ htb_change_class_mode(q, cl, &diff);
if (old_mode != cl->cmode) {
if (old_mode != HTB_CAN_SEND)
- rb_erase(&cl->pq_node,q->wait_pq+cl->level);
+ rb_erase(&cl->pq_node, q->wait_pq + cl->level);
if (cl->cmode != HTB_CAN_SEND)
- htb_add_to_wait_tree (q,cl,diff);
+ htb_add_to_wait_tree(q, cl, diff);
}
-
#ifdef HTB_RATECM
/* update rate counters */
- cl->sum_bytes += bytes; cl->sum_packets++;
+ cl->sum_bytes += bytes;
+ cl->sum_packets++;
#endif
/* update byte stats except for leaves which are already updated */
* next pending event (0 for no event in pq).
* Note: Aplied are events whose have cl->pq_key <= jiffies.
*/
-static long htb_do_events(struct htb_sched *q,int level)
+static long htb_do_events(struct htb_sched *q, int level)
{
int i;
struct htb_class *cl;
long diff;
struct rb_node *p = q->wait_pq[level].rb_node;
- if (!p) return 0;
- while (p->rb_left) p = p->rb_left;
+ if (!p)
+ return 0;
+ while (p->rb_left)
+ p = p->rb_left;
cl = rb_entry(p, struct htb_class, pq_node);
if (time_after(cl->pq_key, q->jiffies)) {
return cl->pq_key - q->jiffies;
}
- rb_erase(p,q->wait_pq+level);
- diff = PSCHED_TDIFF_SAFE(q->now, cl->t_c, (u32)cl->mbuffer);
- htb_change_class_mode(q,cl,&diff);
+ rb_erase(p, q->wait_pq + level);
+ diff = PSCHED_TDIFF_SAFE(q->now, cl->t_c, (u32) cl->mbuffer);
+ htb_change_class_mode(q, cl, &diff);
if (cl->cmode != HTB_CAN_SEND)
- htb_add_to_wait_tree (q,cl,diff);
+ htb_add_to_wait_tree(q, cl, diff);
}
if (net_ratelimit())
printk(KERN_WARNING "htb: too many events !\n");
- return HZ/10;
+ return HZ / 10;
}
/* Returns class->node+prio from id-tree where classe's id is >= id. NULL
is no such one exists. */
-static struct rb_node *
-htb_id_find_next_upper(int prio,struct rb_node *n,u32 id)
+static struct rb_node *htb_id_find_next_upper(int prio, struct rb_node *n,
+ u32 id)
{
struct rb_node *r = NULL;
while (n) {
- struct htb_class *cl = rb_entry(n,struct htb_class,node[prio]);
- if (id == cl->classid) return n;
-
+ struct htb_class *cl =
+ rb_entry(n, struct htb_class, node[prio]);
+ if (id == cl->classid)
+ return n;
+
if (id > cl->classid) {
n = n->rb_right;
} else {
*
* Find leaf where current feed pointers points to.
*/
-static struct htb_class *
-htb_lookup_leaf(struct rb_root *tree,int prio,struct rb_node **pptr,u32 *pid)
+static struct htb_class *htb_lookup_leaf(struct rb_root *tree, int prio,
+ struct rb_node **pptr, u32 * pid)
{
int i;
struct {
struct rb_node *root;
struct rb_node **pptr;
u32 *pid;
- } stk[TC_HTB_MAXDEPTH],*sp = stk;
-
+ } stk[TC_HTB_MAXDEPTH], *sp = stk;
+
BUG_TRAP(tree->rb_node);
sp->root = tree->rb_node;
sp->pptr = pptr;
sp->pid = pid;
for (i = 0; i < 65535; i++) {
- if (!*sp->pptr && *sp->pid) {
+ if (!*sp->pptr && *sp->pid) {
/* ptr was invalidated but id is valid - try to recover
the original or next ptr */
- *sp->pptr = htb_id_find_next_upper(prio,sp->root,*sp->pid);
+ *sp->pptr =
+ htb_id_find_next_upper(prio, sp->root, *sp->pid);
}
- *sp->pid = 0; /* ptr is valid now so that remove this hint as it
- can become out of date quickly */
- if (!*sp->pptr) { /* we are at right end; rewind & go up */
+ *sp->pid = 0; /* ptr is valid now so that remove this hint as it
+ can become out of date quickly */
+ if (!*sp->pptr) { /* we are at right end; rewind & go up */
*sp->pptr = sp->root;
- while ((*sp->pptr)->rb_left)
+ while ((*sp->pptr)->rb_left)
*sp->pptr = (*sp->pptr)->rb_left;
if (sp > stk) {
sp--;
- BUG_TRAP(*sp->pptr); if(!*sp->pptr) return NULL;
- htb_next_rb_node (sp->pptr);
+ BUG_TRAP(*sp->pptr);
+ if (!*sp->pptr)
+ return NULL;
+ htb_next_rb_node(sp->pptr);
}
} else {
struct htb_class *cl;
- cl = rb_entry(*sp->pptr,struct htb_class,node[prio]);
- if (!cl->level)
+ cl = rb_entry(*sp->pptr, struct htb_class, node[prio]);
+ if (!cl->level)
return cl;
(++sp)->root = cl->un.inner.feed[prio].rb_node;
- sp->pptr = cl->un.inner.ptr+prio;
- sp->pid = cl->un.inner.last_ptr_id+prio;
+ sp->pptr = cl->un.inner.ptr + prio;
+ sp->pid = cl->un.inner.last_ptr_id + prio;
}
}
BUG_TRAP(0);
/* dequeues packet at given priority and level; call only if
you are sure that there is active class at prio/level */
-static struct sk_buff *
-htb_dequeue_tree(struct htb_sched *q,int prio,int level)
+static struct sk_buff *htb_dequeue_tree(struct htb_sched *q, int prio,
+ int level)
{
struct sk_buff *skb = NULL;
- struct htb_class *cl,*start;
+ struct htb_class *cl, *start;
/* look initial class up in the row */
- start = cl = htb_lookup_leaf (q->row[level]+prio,prio,
- q->ptr[level]+prio,q->last_ptr_id[level]+prio);
-
+ start = cl = htb_lookup_leaf(q->row[level] + prio, prio,
+ q->ptr[level] + prio,
+ q->last_ptr_id[level] + prio);
+
do {
next:
- BUG_TRAP(cl);
- if (!cl) return NULL;
+ BUG_TRAP(cl);
+ if (!cl)
+ return NULL;
/* class can be empty - it is unlikely but can be true if leaf
qdisc drops packets in enqueue routine or if someone used
simply deactivate and skip such class */
if (unlikely(cl->un.leaf.q->q.qlen == 0)) {
struct htb_class *next;
- htb_deactivate(q,cl);
+ htb_deactivate(q, cl);
/* row/level might become empty */
if ((q->row_mask[level] & (1 << prio)) == 0)
- return NULL;
-
- next = htb_lookup_leaf (q->row[level]+prio,
- prio,q->ptr[level]+prio,q->last_ptr_id[level]+prio);
+ return NULL;
- if (cl == start) /* fix start if we just deleted it */
+ next = htb_lookup_leaf(q->row[level] + prio,
+ prio, q->ptr[level] + prio,
+ q->last_ptr_id[level] + prio);
+
+ if (cl == start) /* fix start if we just deleted it */
start = next;
cl = next;
goto next;
}
-
- if (likely((skb = cl->un.leaf.q->dequeue(cl->un.leaf.q)) != NULL))
+
+ skb = cl->un.leaf.q->dequeue(cl->un.leaf.q);
+ if (likely(skb != NULL))
break;
if (!cl->warned) {
- printk(KERN_WARNING "htb: class %X isn't work conserving ?!\n",cl->classid);
+ printk(KERN_WARNING
+ "htb: class %X isn't work conserving ?!\n",
+ cl->classid);
cl->warned = 1;
}
q->nwc_hit++;
- htb_next_rb_node((level?cl->parent->un.inner.ptr:q->ptr[0])+prio);
- cl = htb_lookup_leaf (q->row[level]+prio,prio,q->ptr[level]+prio,
- q->last_ptr_id[level]+prio);
+ htb_next_rb_node((level ? cl->parent->un.inner.ptr : q->
+ ptr[0]) + prio);
+ cl = htb_lookup_leaf(q->row[level] + prio, prio,
+ q->ptr[level] + prio,
+ q->last_ptr_id[level] + prio);
} while (cl != start);
if (likely(skb != NULL)) {
if ((cl->un.leaf.deficit[level] -= skb->len) < 0) {
cl->un.leaf.deficit[level] += cl->un.leaf.quantum;
- htb_next_rb_node((level?cl->parent->un.inner.ptr:q->ptr[0])+prio);
+ htb_next_rb_node((level ? cl->parent->un.inner.ptr : q->
+ ptr[0]) + prio);
}
/* this used to be after charge_class but this constelation
gives us slightly better performance */
if (!cl->un.leaf.q->q.qlen)
- htb_deactivate (q,cl);
- htb_charge_class (q,cl,level,skb->len);
+ htb_deactivate(q, cl);
+ htb_charge_class(q, cl, level, skb->len);
}
return skb;
}
-static void htb_delay_by(struct Qdisc *sch,long delay)
+static void htb_delay_by(struct Qdisc *sch, long delay)
{
struct htb_sched *q = qdisc_priv(sch);
- if (delay <= 0) delay = 1;
- if (unlikely(delay > 5*HZ)) {
+ if (delay <= 0)
+ delay = 1;
+ if (unlikely(delay > 5 * HZ)) {
if (net_ratelimit())
printk(KERN_INFO "HTB delay %ld > 5sec\n", delay);
- delay = 5*HZ;
+ delay = 5 * HZ;
}
/* why don't use jiffies here ? because expires can be in past */
mod_timer(&q->timer, q->jiffies + delay);
q->jiffies = jiffies;
/* try to dequeue direct packets as high prio (!) to minimize cpu work */
- if ((skb = __skb_dequeue(&q->direct_queue)) != NULL) {
+ skb = __skb_dequeue(&q->direct_queue);
+ if (skb != NULL) {
sch->flags &= ~TCQ_F_THROTTLED;
sch->q.qlen--;
return skb;
}
- if (!sch->q.qlen) goto fin;
+ if (!sch->q.qlen)
+ goto fin;
PSCHED_GET_TIME(q->now);
min_delay = LONG_MAX;
int m;
long delay;
if (time_after_eq(q->jiffies, q->near_ev_cache[level])) {
- delay = htb_do_events(q,level);
- q->near_ev_cache[level] = q->jiffies + (delay ? delay : HZ);
+ delay = htb_do_events(q, level);
+ q->near_ev_cache[level] =
+ q->jiffies + (delay ? delay : HZ);
} else
- delay = q->near_ev_cache[level] - q->jiffies;
-
- if (delay && min_delay > delay)
+ delay = q->near_ev_cache[level] - q->jiffies;
+
+ if (delay && min_delay > delay)
min_delay = delay;
m = ~q->row_mask[level];
while (m != (int)(-1)) {
- int prio = ffz (m);
+ int prio = ffz(m);
m |= 1 << prio;
- skb = htb_dequeue_tree(q,prio,level);
+ skb = htb_dequeue_tree(q, prio, level);
if (likely(skb != NULL)) {
sch->q.qlen--;
sch->flags &= ~TCQ_F_THROTTLED;
}
}
}
- htb_delay_by (sch,min_delay > 5*HZ ? 5*HZ : min_delay);
+ htb_delay_by(sch, min_delay > 5 * HZ ? 5 * HZ : min_delay);
fin:
return skb;
}
/* try to drop from each class (by prio) until one succeed */
-static unsigned int htb_drop(struct Qdisc* sch)
+static unsigned int htb_drop(struct Qdisc *sch)
{
struct htb_sched *q = qdisc_priv(sch);
int prio;
for (prio = TC_HTB_NUMPRIO - 1; prio >= 0; prio--) {
struct list_head *p;
- list_for_each (p,q->drops+prio) {
+ list_for_each(p, q->drops + prio) {
struct htb_class *cl = list_entry(p, struct htb_class,
un.leaf.drop_list);
unsigned int len;
- if (cl->un.leaf.q->ops->drop &&
- (len = cl->un.leaf.q->ops->drop(cl->un.leaf.q))) {
+ if (cl->un.leaf.q->ops->drop &&
+ (len = cl->un.leaf.q->ops->drop(cl->un.leaf.q))) {
sch->q.qlen--;
if (!cl->un.leaf.q->q.qlen)
- htb_deactivate (q,cl);
+ htb_deactivate(q, cl);
return len;
}
}
/* reset all classes */
/* always caled under BH & queue lock */
-static void htb_reset(struct Qdisc* sch)
+static void htb_reset(struct Qdisc *sch)
{
struct htb_sched *q = qdisc_priv(sch);
int i;
for (i = 0; i < HTB_HSIZE; i++) {
struct list_head *p;
- list_for_each (p,q->hash+i) {
- struct htb_class *cl = list_entry(p,struct htb_class,hlist);
+ list_for_each(p, q->hash + i) {
+ struct htb_class *cl =
+ list_entry(p, struct htb_class, hlist);
if (cl->level)
- memset(&cl->un.inner,0,sizeof(cl->un.inner));
+ memset(&cl->un.inner, 0, sizeof(cl->un.inner));
else {
- if (cl->un.leaf.q)
+ if (cl->un.leaf.q)
qdisc_reset(cl->un.leaf.q);
INIT_LIST_HEAD(&cl->un.leaf.drop_list);
}
del_timer(&q->timer);
__skb_queue_purge(&q->direct_queue);
sch->q.qlen = 0;
- memset(q->row,0,sizeof(q->row));
- memset(q->row_mask,0,sizeof(q->row_mask));
- memset(q->wait_pq,0,sizeof(q->wait_pq));
- memset(q->ptr,0,sizeof(q->ptr));
+ memset(q->row, 0, sizeof(q->row));
+ memset(q->row_mask, 0, sizeof(q->row_mask));
+ memset(q->wait_pq, 0, sizeof(q->wait_pq));
+ memset(q->ptr, 0, sizeof(q->ptr));
for (i = 0; i < TC_HTB_NUMPRIO; i++)
- INIT_LIST_HEAD(q->drops+i);
+ INIT_LIST_HEAD(q->drops + i);
}
static int htb_init(struct Qdisc *sch, struct rtattr *opt)
struct tc_htb_glob *gopt;
int i;
if (!opt || rtattr_parse_nested(tb, TCA_HTB_INIT, opt) ||
- tb[TCA_HTB_INIT-1] == NULL ||
- RTA_PAYLOAD(tb[TCA_HTB_INIT-1]) < sizeof(*gopt)) {
+ tb[TCA_HTB_INIT - 1] == NULL ||
+ RTA_PAYLOAD(tb[TCA_HTB_INIT - 1]) < sizeof(*gopt)) {
printk(KERN_ERR "HTB: hey probably you have bad tc tool ?\n");
return -EINVAL;
}
- gopt = RTA_DATA(tb[TCA_HTB_INIT-1]);
+ gopt = RTA_DATA(tb[TCA_HTB_INIT - 1]);
if (gopt->version != HTB_VER >> 16) {
- printk(KERN_ERR "HTB: need tc/htb version %d (minor is %d), you have %d\n",
- HTB_VER >> 16,HTB_VER & 0xffff,gopt->version);
+ printk(KERN_ERR
+ "HTB: need tc/htb version %d (minor is %d), you have %d\n",
+ HTB_VER >> 16, HTB_VER & 0xffff, gopt->version);
return -EINVAL;
}
INIT_LIST_HEAD(&q->root);
for (i = 0; i < HTB_HSIZE; i++)
- INIT_LIST_HEAD(q->hash+i);
+ INIT_LIST_HEAD(q->hash + i);
for (i = 0; i < TC_HTB_NUMPRIO; i++)
- INIT_LIST_HEAD(q->drops+i);
+ INIT_LIST_HEAD(q->drops + i);
init_timer(&q->timer);
skb_queue_head_init(&q->direct_queue);
q->direct_qlen = sch->dev->tx_queue_len;
- if (q->direct_qlen < 2) /* some devices have zero tx_queue_len */
+ if (q->direct_qlen < 2) /* some devices have zero tx_queue_len */
q->direct_qlen = 2;
q->timer.function = htb_timer;
q->timer.data = (unsigned long)sch;
static int htb_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct htb_sched *q = qdisc_priv(sch);
- unsigned char *b = skb->tail;
+ unsigned char *b = skb->tail;
struct rtattr *rta;
struct tc_htb_glob gopt;
spin_lock_bh(&sch->dev->queue_lock);
gopt.rate2quantum = q->rate2quantum;
gopt.defcls = q->defcls;
gopt.debug = 0;
- rta = (struct rtattr*)b;
+ rta = (struct rtattr *)b;
RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
RTA_PUT(skb, TCA_HTB_INIT, sizeof(gopt), &gopt);
rta->rta_len = skb->tail - b;
}
static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
- struct sk_buff *skb, struct tcmsg *tcm)
+ struct sk_buff *skb, struct tcmsg *tcm)
{
- struct htb_class *cl = (struct htb_class*)arg;
- unsigned char *b = skb->tail;
+ struct htb_class *cl = (struct htb_class *)arg;
+ unsigned char *b = skb->tail;
struct rtattr *rta;
struct tc_htb_opt opt;
if (!cl->level && cl->un.leaf.q)
tcm->tcm_info = cl->un.leaf.q->handle;
- rta = (struct rtattr*)b;
+ rta = (struct rtattr *)b;
RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
- memset (&opt,0,sizeof(opt));
+ memset(&opt, 0, sizeof(opt));
- opt.rate = cl->rate->rate; opt.buffer = cl->buffer;
- opt.ceil = cl->ceil->rate; opt.cbuffer = cl->cbuffer;
- opt.quantum = cl->un.leaf.quantum; opt.prio = cl->un.leaf.prio;
- opt.level = cl->level;
+ opt.rate = cl->rate->rate;
+ opt.buffer = cl->buffer;
+ opt.ceil = cl->ceil->rate;
+ opt.cbuffer = cl->cbuffer;
+ opt.quantum = cl->un.leaf.quantum;
+ opt.prio = cl->un.leaf.prio;
+ opt.level = cl->level;
RTA_PUT(skb, TCA_HTB_PARMS, sizeof(opt), &opt);
rta->rta_len = skb->tail - b;
spin_unlock_bh(&sch->dev->queue_lock);
}
static int
-htb_dump_class_stats(struct Qdisc *sch, unsigned long arg,
- struct gnet_dump *d)
+htb_dump_class_stats(struct Qdisc *sch, unsigned long arg, struct gnet_dump *d)
{
- struct htb_class *cl = (struct htb_class*)arg;
+ struct htb_class *cl = (struct htb_class *)arg;
#ifdef HTB_RATECM
- cl->rate_est.bps = cl->rate_bytes/(HTB_EWMAC*HTB_HSIZE);
- cl->rate_est.pps = cl->rate_packets/(HTB_EWMAC*HTB_HSIZE);
+ cl->rate_est.bps = cl->rate_bytes / (HTB_EWMAC * HTB_HSIZE);
+ cl->rate_est.pps = cl->rate_packets / (HTB_EWMAC * HTB_HSIZE);
#endif
if (!cl->level && cl->un.leaf.q)
}
static int htb_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
- struct Qdisc **old)
+ struct Qdisc **old)
{
- struct htb_class *cl = (struct htb_class*)arg;
+ struct htb_class *cl = (struct htb_class *)arg;
if (cl && !cl->level) {
- if (new == NULL && (new = qdisc_create_dflt(sch->dev,
- &pfifo_qdisc_ops)) == NULL)
- return -ENOBUFS;
+ if (new == NULL && (new = qdisc_create_dflt(sch->dev,
+ &pfifo_qdisc_ops))
+ == NULL)
+ return -ENOBUFS;
sch_tree_lock(sch);
if ((*old = xchg(&cl->un.leaf.q, new)) != NULL) {
if (cl->prio_activity)
- htb_deactivate (qdisc_priv(sch),cl);
+ htb_deactivate(qdisc_priv(sch), cl);
/* TODO: is it correct ? Why CBQ doesn't do it ? */
- sch->q.qlen -= (*old)->q.qlen;
+ sch->q.qlen -= (*old)->q.qlen;
qdisc_reset(*old);
}
sch_tree_unlock(sch);
return -ENOENT;
}
-static struct Qdisc * htb_leaf(struct Qdisc *sch, unsigned long arg)
+static struct Qdisc *htb_leaf(struct Qdisc *sch, unsigned long arg)
{
- struct htb_class *cl = (struct htb_class*)arg;
+ struct htb_class *cl = (struct htb_class *)arg;
return (cl && !cl->level) ? cl->un.leaf.q : NULL;
}
static unsigned long htb_get(struct Qdisc *sch, u32 classid)
{
- struct htb_class *cl = htb_find(classid,sch);
- if (cl)
+ struct htb_class *cl = htb_find(classid, sch);
+ if (cl)
cl->refcnt++;
return (unsigned long)cl;
}
}
}
-static void htb_destroy_class(struct Qdisc* sch,struct htb_class *cl)
+static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
{
struct htb_sched *q = qdisc_priv(sch);
if (!cl->level) {
}
qdisc_put_rtab(cl->rate);
qdisc_put_rtab(cl->ceil);
-
- htb_destroy_filters (&cl->filter_list);
-
- while (!list_empty(&cl->children))
- htb_destroy_class (sch,list_entry(cl->children.next,
- struct htb_class,sibling));
+
+ htb_destroy_filters(&cl->filter_list);
+
+ while (!list_empty(&cl->children))
+ htb_destroy_class(sch, list_entry(cl->children.next,
+ struct htb_class, sibling));
/* note: this delete may happen twice (see htb_delete) */
list_del(&cl->hlist);
list_del(&cl->sibling);
-
+
if (cl->prio_activity)
- htb_deactivate (q,cl);
-
+ htb_deactivate(q, cl);
+
if (cl->cmode != HTB_CAN_SEND)
- rb_erase(&cl->pq_node,q->wait_pq+cl->level);
-
+ rb_erase(&cl->pq_node, q->wait_pq + cl->level);
+
kfree(cl);
}
/* always caled under BH & queue lock */
-static void htb_destroy(struct Qdisc* sch)
+static void htb_destroy(struct Qdisc *sch)
{
struct htb_sched *q = qdisc_priv(sch);
- del_timer_sync (&q->timer);
+ del_timer_sync(&q->timer);
#ifdef HTB_RATECM
- del_timer_sync (&q->rttim);
+ del_timer_sync(&q->rttim);
#endif
/* This line used to be after htb_destroy_class call below
and surprisingly it worked in 2.4. But it must precede it
because filter need its target class alive to be able to call
unbind_filter on it (without Oops). */
htb_destroy_filters(&q->filter_list);
-
- while (!list_empty(&q->root))
- htb_destroy_class (sch,list_entry(q->root.next,
- struct htb_class,sibling));
+
+ while (!list_empty(&q->root))
+ htb_destroy_class(sch, list_entry(q->root.next,
+ struct htb_class, sibling));
__skb_queue_purge(&q->direct_queue);
}
static int htb_delete(struct Qdisc *sch, unsigned long arg)
{
struct htb_sched *q = qdisc_priv(sch);
- struct htb_class *cl = (struct htb_class*)arg;
+ struct htb_class *cl = (struct htb_class *)arg;
// TODO: why don't allow to delete subtree ? references ? does
// tc subsys quarantee us that in htb_destroy it holds no class
// refs so that we can remove children safely there ?
if (!list_empty(&cl->children) || cl->filter_cnt)
return -EBUSY;
-
+
sch_tree_lock(sch);
-
+
/* delete from hash and active; remainder in destroy_class */
list_del_init(&cl->hlist);
if (cl->prio_activity)
- htb_deactivate (q,cl);
+ htb_deactivate(q, cl);
if (--cl->refcnt == 0)
- htb_destroy_class(sch,cl);
+ htb_destroy_class(sch, cl);
sch_tree_unlock(sch);
return 0;
static void htb_put(struct Qdisc *sch, unsigned long arg)
{
- struct htb_class *cl = (struct htb_class*)arg;
+ struct htb_class *cl = (struct htb_class *)arg;
if (--cl->refcnt == 0)
- htb_destroy_class(sch,cl);
+ htb_destroy_class(sch, cl);
}
-static int htb_change_class(struct Qdisc *sch, u32 classid,
- u32 parentid, struct rtattr **tca, unsigned long *arg)
+static int htb_change_class(struct Qdisc *sch, u32 classid,
+ u32 parentid, struct rtattr **tca,
+ unsigned long *arg)
{
int err = -EINVAL;
struct htb_sched *q = qdisc_priv(sch);
- struct htb_class *cl = (struct htb_class*)*arg,*parent;
- struct rtattr *opt = tca[TCA_OPTIONS-1];
+ struct htb_class *cl = (struct htb_class *)*arg, *parent;
+ struct rtattr *opt = tca[TCA_OPTIONS - 1];
struct qdisc_rate_table *rtab = NULL, *ctab = NULL;
struct rtattr *tb[TCA_HTB_RTAB];
struct tc_htb_opt *hopt;
/* extract all subattrs from opt attr */
if (!opt || rtattr_parse_nested(tb, TCA_HTB_RTAB, opt) ||
- tb[TCA_HTB_PARMS-1] == NULL ||
- RTA_PAYLOAD(tb[TCA_HTB_PARMS-1]) < sizeof(*hopt))
+ tb[TCA_HTB_PARMS - 1] == NULL ||
+ RTA_PAYLOAD(tb[TCA_HTB_PARMS - 1]) < sizeof(*hopt))
goto failure;
-
- parent = parentid == TC_H_ROOT ? NULL : htb_find (parentid,sch);
- hopt = RTA_DATA(tb[TCA_HTB_PARMS-1]);
+ parent = parentid == TC_H_ROOT ? NULL : htb_find(parentid, sch);
+
+ hopt = RTA_DATA(tb[TCA_HTB_PARMS - 1]);
- rtab = qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB-1]);
- ctab = qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB-1]);
- if (!rtab || !ctab) goto failure;
+ rtab = qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB - 1]);
+ ctab = qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB - 1]);
+ if (!rtab || !ctab)
+ goto failure;
- if (!cl) { /* new class */
+ if (!cl) { /* new class */
struct Qdisc *new_q;
/* check for valid classid */
- if (!classid || TC_H_MAJ(classid^sch->handle) || htb_find(classid,sch))
+ if (!classid || TC_H_MAJ(classid ^ sch->handle)
+ || htb_find(classid, sch))
goto failure;
/* check maximal depth */
err = -ENOBUFS;
if ((cl = kzalloc(sizeof(*cl), GFP_KERNEL)) == NULL)
goto failure;
-
+
cl->refcnt = 1;
INIT_LIST_HEAD(&cl->sibling);
INIT_LIST_HEAD(&cl->hlist);
if (parent && !parent->level) {
/* turn parent into inner node */
sch->q.qlen -= parent->un.leaf.q->q.qlen;
- qdisc_destroy (parent->un.leaf.q);
- if (parent->prio_activity)
- htb_deactivate (q,parent);
+ qdisc_destroy(parent->un.leaf.q);
+ if (parent->prio_activity)
+ htb_deactivate(q, parent);
/* remove from evt list because of level change */
if (parent->cmode != HTB_CAN_SEND) {
- rb_erase(&parent->pq_node,q->wait_pq);
+ rb_erase(&parent->pq_node, q->wait_pq);
parent->cmode = HTB_CAN_SEND;
}
parent->level = (parent->parent ? parent->parent->level
- : TC_HTB_MAXDEPTH) - 1;
- memset (&parent->un.inner,0,sizeof(parent->un.inner));
+ : TC_HTB_MAXDEPTH) - 1;
+ memset(&parent->un.inner, 0, sizeof(parent->un.inner));
}
/* leaf (we) needs elementary qdisc */
cl->un.leaf.q = new_q ? new_q : &noop_qdisc;
- cl->classid = classid; cl->parent = parent;
+ cl->classid = classid;
+ cl->parent = parent;
/* set class to be in HTB_CAN_SEND state */
cl->tokens = hopt->buffer;
cl->ctokens = hopt->cbuffer;
- cl->mbuffer = PSCHED_JIFFIE2US(HZ*60); /* 1min */
+ cl->mbuffer = PSCHED_JIFFIE2US(HZ * 60); /* 1min */
PSCHED_GET_TIME(cl->t_c);
cl->cmode = HTB_CAN_SEND;
/* attach to the hash list and parent's family */
- list_add_tail(&cl->hlist, q->hash+htb_hash(classid));
- list_add_tail(&cl->sibling, parent ? &parent->children : &q->root);
- } else sch_tree_lock(sch);
+ list_add_tail(&cl->hlist, q->hash + htb_hash(classid));
+ list_add_tail(&cl->sibling,
+ parent ? &parent->children : &q->root);
+ } else
+ sch_tree_lock(sch);
/* it used to be a nasty bug here, we have to check that node
- is really leaf before changing cl->un.leaf ! */
+ is really leaf before changing cl->un.leaf ! */
if (!cl->level) {
cl->un.leaf.quantum = rtab->rate.rate / q->rate2quantum;
if (!hopt->quantum && cl->un.leaf.quantum < 1000) {
- printk(KERN_WARNING "HTB: quantum of class %X is small. Consider r2q change.\n", cl->classid);
+ printk(KERN_WARNING
+ "HTB: quantum of class %X is small. Consider r2q change.\n",
+ cl->classid);
cl->un.leaf.quantum = 1000;
}
if (!hopt->quantum && cl->un.leaf.quantum > 200000) {
- printk(KERN_WARNING "HTB: quantum of class %X is big. Consider r2q change.\n", cl->classid);
+ printk(KERN_WARNING
+ "HTB: quantum of class %X is big. Consider r2q change.\n",
+ cl->classid);
cl->un.leaf.quantum = 200000;
}
if (hopt->quantum)
cl->buffer = hopt->buffer;
cl->cbuffer = hopt->cbuffer;
- if (cl->rate) qdisc_put_rtab(cl->rate); cl->rate = rtab;
- if (cl->ceil) qdisc_put_rtab(cl->ceil); cl->ceil = ctab;
+ if (cl->rate)
+ qdisc_put_rtab(cl->rate);
+ cl->rate = rtab;
+ if (cl->ceil)
+ qdisc_put_rtab(cl->ceil);
+ cl->ceil = ctab;
sch_tree_unlock(sch);
*arg = (unsigned long)cl;
return 0;
failure:
- if (rtab) qdisc_put_rtab(rtab);
- if (ctab) qdisc_put_rtab(ctab);
+ if (rtab)
+ qdisc_put_rtab(rtab);
+ if (ctab)
+ qdisc_put_rtab(ctab);
return err;
}
}
static unsigned long htb_bind_filter(struct Qdisc *sch, unsigned long parent,
- u32 classid)
+ u32 classid)
{
struct htb_sched *q = qdisc_priv(sch);
- struct htb_class *cl = htb_find (classid,sch);
+ struct htb_class *cl = htb_find(classid, sch);
/*if (cl && !cl->level) return 0;
- The line above used to be there to prevent attaching filters to
- leaves. But at least tc_index filter uses this just to get class
- for other reasons so that we have to allow for it.
- ----
- 19.6.2002 As Werner explained it is ok - bind filter is just
- another way to "lock" the class - unlike "get" this lock can
- be broken by class during destroy IIUC.
+ The line above used to be there to prevent attaching filters to
+ leaves. But at least tc_index filter uses this just to get class
+ for other reasons so that we have to allow for it.
+ ----
+ 19.6.2002 As Werner explained it is ok - bind filter is just
+ another way to "lock" the class - unlike "get" this lock can
+ be broken by class during destroy IIUC.
*/
- if (cl)
- cl->filter_cnt++;
- else
+ if (cl)
+ cl->filter_cnt++;
+ else
q->filter_cnt++;
return (unsigned long)cl;
}
struct htb_sched *q = qdisc_priv(sch);
struct htb_class *cl = (struct htb_class *)arg;
- if (cl)
- cl->filter_cnt--;
- else
+ if (cl)
+ cl->filter_cnt--;
+ else
q->filter_cnt--;
}
for (i = 0; i < HTB_HSIZE; i++) {
struct list_head *p;
- list_for_each (p,q->hash+i) {
- struct htb_class *cl = list_entry(p,struct htb_class,hlist);
+ list_for_each(p, q->hash + i) {
+ struct htb_class *cl =
+ list_entry(p, struct htb_class, hlist);
if (arg->count < arg->skip) {
arg->count++;
continue;
static int __init htb_module_init(void)
{
- return register_qdisc(&htb_qdisc_ops);
+ return register_qdisc(&htb_qdisc_ops);
}
-static void __exit htb_module_exit(void)
+static void __exit htb_module_exit(void)
{
- unregister_qdisc(&htb_qdisc_ops);
+ unregister_qdisc(&htb_qdisc_ops);
}
+
module_init(htb_module_init)
module_exit(htb_module_exit)
MODULE_LICENSE("GPL");
projects / linux-2.6 / commitdiff