diff options
Diffstat (limited to 'net/sched/sch_htb.c')
| -rw-r--r-- | net/sched/sch_htb.c | 80 |
1 files changed, 15 insertions, 65 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index 51561eafcb7..03c2692ca01 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -38,6 +38,7 @@ #include <linux/workqueue.h> #include <linux/slab.h> #include <net/netlink.h> +#include <net/sch_generic.h> #include <net/pkt_sched.h> /* HTB algorithm. @@ -71,12 +72,6 @@ enum htb_cmode { HTB_CAN_SEND /* class can send */ }; -struct htb_rate_cfg { - u64 rate_bps; - u32 mult; - u32 shift; -}; - /* interior & leaf nodes; props specific to leaves are marked L: */ struct htb_class { struct Qdisc_class_common common; @@ -124,8 +119,8 @@ struct htb_class { int filter_cnt; /* token bucket parameters */ - struct htb_rate_cfg rate; - struct htb_rate_cfg ceil; + struct psched_ratecfg rate; + struct psched_ratecfg ceil; s64 buffer, cbuffer; /* token bucket depth/rate */ psched_tdiff_t mbuffer; /* max wait time */ s64 tokens, ctokens; /* current number of tokens */ @@ -168,45 +163,6 @@ struct htb_sched { struct work_struct work; }; -static u64 l2t_ns(struct htb_rate_cfg *r, unsigned int len) -{ - return ((u64)len * r->mult) >> r->shift; -} - -static void htb_precompute_ratedata(struct htb_rate_cfg *r) -{ - u64 factor; - u64 mult; - int shift; - - r->shift = 0; - r->mult = 1; - /* - * Calibrate mult, shift so that token counting is accurate - * for smallest packet size (64 bytes). Token (time in ns) is - * computed as (bytes * 8) * NSEC_PER_SEC / rate_bps. It will - * work as long as the smallest packet transfer time can be - * accurately represented in nanosec. - */ - if (r->rate_bps > 0) { - /* - * Higher shift gives better accuracy. Find the largest - * shift such that mult fits in 32 bits. - */ - for (shift = 0; shift < 16; shift++) { - r->shift = shift; - factor = 8LLU * NSEC_PER_SEC * (1 << r->shift); - mult = div64_u64(factor, r->rate_bps); - if (mult > UINT_MAX) - break; - } - - r->shift = shift - 1; - factor = 8LLU * NSEC_PER_SEC * (1 << r->shift); - r->mult = div64_u64(factor, r->rate_bps); - } -} - /* find class in global hash table using given handle */ static inline struct htb_class *htb_find(u32 handle, struct Qdisc *sch) { @@ -632,7 +588,7 @@ static inline void htb_accnt_tokens(struct htb_class *cl, int bytes, s64 diff) if (toks > cl->buffer) toks = cl->buffer; - toks -= (s64) l2t_ns(&cl->rate, bytes); + toks -= (s64) psched_l2t_ns(&cl->rate, bytes); if (toks <= -cl->mbuffer) toks = 1 - cl->mbuffer; @@ -645,7 +601,7 @@ static inline void htb_accnt_ctokens(struct htb_class *cl, int bytes, s64 diff) if (toks > cl->cbuffer) toks = cl->cbuffer; - toks -= (s64) l2t_ns(&cl->ceil, bytes); + toks -= (s64) psched_l2t_ns(&cl->ceil, bytes); if (toks <= -cl->mbuffer) toks = 1 - cl->mbuffer; @@ -1134,10 +1090,10 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg, memset(&opt, 0, sizeof(opt)); - opt.rate.rate = cl->rate.rate_bps >> 3; - opt.buffer = cl->buffer; - opt.ceil.rate = cl->ceil.rate_bps >> 3; - opt.cbuffer = cl->cbuffer; + opt.rate.rate = psched_ratecfg_getrate(&cl->rate); + opt.buffer = PSCHED_NS2TICKS(cl->buffer); + opt.ceil.rate = psched_ratecfg_getrate(&cl->ceil); + opt.cbuffer = PSCHED_NS2TICKS(cl->cbuffer); opt.quantum = cl->quantum; opt.prio = cl->prio; opt.level = cl->level; @@ -1459,8 +1415,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, cl->parent = parent; /* set class to be in HTB_CAN_SEND state */ - cl->tokens = hopt->buffer; - cl->ctokens = hopt->cbuffer; + cl->tokens = PSCHED_TICKS2NS(hopt->buffer); + cl->ctokens = PSCHED_TICKS2NS(hopt->cbuffer); cl->mbuffer = 60 * PSCHED_TICKS_PER_SEC; /* 1min */ cl->t_c = psched_get_time(); cl->cmode = HTB_CAN_SEND; @@ -1503,17 +1459,11 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, cl->prio = TC_HTB_NUMPRIO - 1; } - cl->buffer = hopt->buffer; - cl->cbuffer = hopt->cbuffer; - - cl->rate.rate_bps = (u64)hopt->rate.rate << 3; - cl->ceil.rate_bps = (u64)hopt->ceil.rate << 3; - - htb_precompute_ratedata(&cl->rate); - htb_precompute_ratedata(&cl->ceil); + psched_ratecfg_precompute(&cl->rate, hopt->rate.rate); + psched_ratecfg_precompute(&cl->ceil, hopt->ceil.rate); - cl->buffer = hopt->buffer << PSCHED_SHIFT; - cl->cbuffer = hopt->buffer << PSCHED_SHIFT; + cl->buffer = PSCHED_TICKS2NS(hopt->buffer); + cl->cbuffer = PSCHED_TICKS2NS(hopt->buffer); sch_tree_unlock(sch); |