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-rw-r--r--include/linux/pkt_sched.h454
1 files changed, 454 insertions, 0 deletions
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
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1#ifndef __LINUX_PKT_SCHED_H
2#define __LINUX_PKT_SCHED_H
3
4/* Logical priority bands not depending on specific packet scheduler.
5 Every scheduler will map them to real traffic classes, if it has
6 no more precise mechanism to classify packets.
7
8 These numbers have no special meaning, though their coincidence
9 with obsolete IPv6 values is not occasional :-). New IPv6 drafts
10 preferred full anarchy inspired by diffserv group.
11
12 Note: TC_PRIO_BESTEFFORT does not mean that it is the most unhappy
13 class, actually, as rule it will be handled with more care than
14 filler or even bulk.
15 */
16
17#define TC_PRIO_BESTEFFORT 0
18#define TC_PRIO_FILLER 1
19#define TC_PRIO_BULK 2
20#define TC_PRIO_INTERACTIVE_BULK 4
21#define TC_PRIO_INTERACTIVE 6
22#define TC_PRIO_CONTROL 7
23
24#define TC_PRIO_MAX 15
25
26/* Generic queue statistics, available for all the elements.
27 Particular schedulers may have also their private records.
28 */
29
30struct tc_stats
31{
32 __u64 bytes; /* NUmber of enqueues bytes */
33 __u32 packets; /* Number of enqueued packets */
34 __u32 drops; /* Packets dropped because of lack of resources */
35 __u32 overlimits; /* Number of throttle events when this
36 * flow goes out of allocated bandwidth */
37 __u32 bps; /* Current flow byte rate */
38 __u32 pps; /* Current flow packet rate */
39 __u32 qlen;
40 __u32 backlog;
41};
42
43struct tc_estimator
44{
45 signed char interval;
46 unsigned char ewma_log;
47};
48
49/* "Handles"
50 ---------
51
52 All the traffic control objects have 32bit identifiers, or "handles".
53
54 They can be considered as opaque numbers from user API viewpoint,
55 but actually they always consist of two fields: major and
56 minor numbers, which are interpreted by kernel specially,
57 that may be used by applications, though not recommended.
58
59 F.e. qdisc handles always have minor number equal to zero,
60 classes (or flows) have major equal to parent qdisc major, and
61 minor uniquely identifying class inside qdisc.
62
63 Macros to manipulate handles:
64 */
65
66#define TC_H_MAJ_MASK (0xFFFF0000U)
67#define TC_H_MIN_MASK (0x0000FFFFU)
68#define TC_H_MAJ(h) ((h)&TC_H_MAJ_MASK)
69#define TC_H_MIN(h) ((h)&TC_H_MIN_MASK)
70#define TC_H_MAKE(maj,min) (((maj)&TC_H_MAJ_MASK)|((min)&TC_H_MIN_MASK))
71
72#define TC_H_UNSPEC (0U)
73#define TC_H_ROOT (0xFFFFFFFFU)
74#define TC_H_INGRESS (0xFFFFFFF1U)
75
76struct tc_ratespec
77{
78 unsigned char cell_log;
79 unsigned char __reserved;
80 unsigned short feature;
81 short addend;
82 unsigned short mpu;
83 __u32 rate;
84};
85
86/* FIFO section */
87
88struct tc_fifo_qopt
89{
90 __u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
91};
92
93/* PRIO section */
94
95#define TCQ_PRIO_BANDS 16
96
97struct tc_prio_qopt
98{
99 int bands; /* Number of bands */
100 __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
101};
102
103/* TBF section */
104
105struct tc_tbf_qopt
106{
107 struct tc_ratespec rate;
108 struct tc_ratespec peakrate;
109 __u32 limit;
110 __u32 buffer;
111 __u32 mtu;
112};
113
114enum
115{
116 TCA_TBF_UNSPEC,
117 TCA_TBF_PARMS,
118 TCA_TBF_RTAB,
119 TCA_TBF_PTAB,
120 __TCA_TBF_MAX,
121};
122
123#define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
124
125
126/* TEQL section */
127
128/* TEQL does not require any parameters */
129
130/* SFQ section */
131
132struct tc_sfq_qopt
133{
134 unsigned quantum; /* Bytes per round allocated to flow */
135 int perturb_period; /* Period of hash perturbation */
136 __u32 limit; /* Maximal packets in queue */
137 unsigned divisor; /* Hash divisor */
138 unsigned flows; /* Maximal number of flows */
139};
140
141/*
142 * NOTE: limit, divisor and flows are hardwired to code at the moment.
143 *
144 * limit=flows=128, divisor=1024;
145 *
146 * The only reason for this is efficiency, it is possible
147 * to change these parameters in compile time.
148 */
149
150/* RED section */
151
152enum
153{
154 TCA_RED_UNSPEC,
155 TCA_RED_PARMS,
156 TCA_RED_STAB,
157 __TCA_RED_MAX,
158};
159
160#define TCA_RED_MAX (__TCA_RED_MAX - 1)
161
162struct tc_red_qopt
163{
164 __u32 limit; /* HARD maximal queue length (bytes) */
165 __u32 qth_min; /* Min average length threshold (bytes) */
166 __u32 qth_max; /* Max average length threshold (bytes) */
167 unsigned char Wlog; /* log(W) */
168 unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
169 unsigned char Scell_log; /* cell size for idle damping */
170 unsigned char flags;
171#define TC_RED_ECN 1
172};
173
174struct tc_red_xstats
175{
176 __u32 early; /* Early drops */
177 __u32 pdrop; /* Drops due to queue limits */
178 __u32 other; /* Drops due to drop() calls */
179 __u32 marked; /* Marked packets */
180};
181
182/* GRED section */
183
184#define MAX_DPs 16
185
186enum
187{
188 TCA_GRED_UNSPEC,
189 TCA_GRED_PARMS,
190 TCA_GRED_STAB,
191 TCA_GRED_DPS,
192 __TCA_GRED_MAX,
193};
194
195#define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
196
197#define TCA_SET_OFF TCA_GRED_PARMS
198struct tc_gred_qopt
199{
200 __u32 limit; /* HARD maximal queue length (bytes)
201*/
202 __u32 qth_min; /* Min average length threshold (bytes)
203*/
204 __u32 qth_max; /* Max average length threshold (bytes)
205*/
206 __u32 DP; /* upto 2^32 DPs */
207 __u32 backlog;
208 __u32 qave;
209 __u32 forced;
210 __u32 early;
211 __u32 other;
212 __u32 pdrop;
213
214 unsigned char Wlog; /* log(W) */
215 unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
216 unsigned char Scell_log; /* cell size for idle damping */
217 __u8 prio; /* prio of this VQ */
218 __u32 packets;
219 __u32 bytesin;
220};
221/* gred setup */
222struct tc_gred_sopt
223{
224 __u32 DPs;
225 __u32 def_DP;
226 __u8 grio;
227};
228
229/* HTB section */
230#define TC_HTB_NUMPRIO 8
231#define TC_HTB_MAXDEPTH 8
232#define TC_HTB_PROTOVER 3 /* the same as HTB and TC's major */
233
234struct tc_htb_opt
235{
236 struct tc_ratespec rate;
237 struct tc_ratespec ceil;
238 __u32 buffer;
239 __u32 cbuffer;
240 __u32 quantum;
241 __u32 level; /* out only */
242 __u32 prio;
243};
244struct tc_htb_glob
245{
246 __u32 version; /* to match HTB/TC */
247 __u32 rate2quantum; /* bps->quantum divisor */
248 __u32 defcls; /* default class number */
249 __u32 debug; /* debug flags */
250
251 /* stats */
252 __u32 direct_pkts; /* count of non shapped packets */
253};
254enum
255{
256 TCA_HTB_UNSPEC,
257 TCA_HTB_PARMS,
258 TCA_HTB_INIT,
259 TCA_HTB_CTAB,
260 TCA_HTB_RTAB,
261 __TCA_HTB_MAX,
262};
263
264#define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
265
266struct tc_htb_xstats
267{
268 __u32 lends;
269 __u32 borrows;
270 __u32 giants; /* too big packets (rate will not be accurate) */
271 __u32 tokens;
272 __u32 ctokens;
273};
274
275/* HFSC section */
276
277struct tc_hfsc_qopt
278{
279 __u16 defcls; /* default class */
280};
281
282struct tc_service_curve
283{
284 __u32 m1; /* slope of the first segment in bps */
285 __u32 d; /* x-projection of the first segment in us */
286 __u32 m2; /* slope of the second segment in bps */
287};
288
289struct tc_hfsc_stats
290{
291 __u64 work; /* total work done */
292 __u64 rtwork; /* work done by real-time criteria */
293 __u32 period; /* current period */
294 __u32 level; /* class level in hierarchy */
295};
296
297enum
298{
299 TCA_HFSC_UNSPEC,
300 TCA_HFSC_RSC,
301 TCA_HFSC_FSC,
302 TCA_HFSC_USC,
303 __TCA_HFSC_MAX,
304};
305
306#define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
307
308
309/* CBQ section */
310
311#define TC_CBQ_MAXPRIO 8
312#define TC_CBQ_MAXLEVEL 8
313#define TC_CBQ_DEF_EWMA 5
314
315struct tc_cbq_lssopt
316{
317 unsigned char change;
318 unsigned char flags;
319#define TCF_CBQ_LSS_BOUNDED 1
320#define TCF_CBQ_LSS_ISOLATED 2
321 unsigned char ewma_log;
322 unsigned char level;
323#define TCF_CBQ_LSS_FLAGS 1
324#define TCF_CBQ_LSS_EWMA 2
325#define TCF_CBQ_LSS_MAXIDLE 4
326#define TCF_CBQ_LSS_MINIDLE 8
327#define TCF_CBQ_LSS_OFFTIME 0x10
328#define TCF_CBQ_LSS_AVPKT 0x20
329 __u32 maxidle;
330 __u32 minidle;
331 __u32 offtime;
332 __u32 avpkt;
333};
334
335struct tc_cbq_wrropt
336{
337 unsigned char flags;
338 unsigned char priority;
339 unsigned char cpriority;
340 unsigned char __reserved;
341 __u32 allot;
342 __u32 weight;
343};
344
345struct tc_cbq_ovl
346{
347 unsigned char strategy;
348#define TC_CBQ_OVL_CLASSIC 0
349#define TC_CBQ_OVL_DELAY 1
350#define TC_CBQ_OVL_LOWPRIO 2
351#define TC_CBQ_OVL_DROP 3
352#define TC_CBQ_OVL_RCLASSIC 4
353 unsigned char priority2;
354 __u32 penalty;
355};
356
357struct tc_cbq_police
358{
359 unsigned char police;
360 unsigned char __res1;
361 unsigned short __res2;
362};
363
364struct tc_cbq_fopt
365{
366 __u32 split;
367 __u32 defmap;
368 __u32 defchange;
369};
370
371struct tc_cbq_xstats
372{
373 __u32 borrows;
374 __u32 overactions;
375 __s32 avgidle;
376 __s32 undertime;
377};
378
379enum
380{
381 TCA_CBQ_UNSPEC,
382 TCA_CBQ_LSSOPT,
383 TCA_CBQ_WRROPT,
384 TCA_CBQ_FOPT,
385 TCA_CBQ_OVL_STRATEGY,
386 TCA_CBQ_RATE,
387 TCA_CBQ_RTAB,
388 TCA_CBQ_POLICE,
389 __TCA_CBQ_MAX,
390};
391
392#define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
393
394/* dsmark section */
395
396enum {
397 TCA_DSMARK_UNSPEC,
398 TCA_DSMARK_INDICES,
399 TCA_DSMARK_DEFAULT_INDEX,
400 TCA_DSMARK_SET_TC_INDEX,
401 TCA_DSMARK_MASK,
402 TCA_DSMARK_VALUE,
403 __TCA_DSMARK_MAX,
404};
405
406#define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
407
408/* ATM section */
409
410enum {
411 TCA_ATM_UNSPEC,
412 TCA_ATM_FD, /* file/socket descriptor */
413 TCA_ATM_PTR, /* pointer to descriptor - later */
414 TCA_ATM_HDR, /* LL header */
415 TCA_ATM_EXCESS, /* excess traffic class (0 for CLP) */
416 TCA_ATM_ADDR, /* PVC address (for output only) */
417 TCA_ATM_STATE, /* VC state (ATM_VS_*; for output only) */
418 __TCA_ATM_MAX,
419};
420
421#define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
422
423/* Network emulator */
424
425enum
426{
427 TCA_NETEM_UNSPEC,
428 TCA_NETEM_CORR,
429 TCA_NETEM_DELAY_DIST,
430 __TCA_NETEM_MAX,
431};
432
433#define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
434
435struct tc_netem_qopt
436{
437 __u32 latency; /* added delay (us) */
438 __u32 limit; /* fifo limit (packets) */
439 __u32 loss; /* random packet loss (0=none ~0=100%) */
440 __u32 gap; /* re-ordering gap (0 for delay all) */
441 __u32 duplicate; /* random packet dup (0=none ~0=100%) */
442 __u32 jitter; /* random jitter in latency (us) */
443};
444
445struct tc_netem_corr
446{
447 __u32 delay_corr; /* delay correlation */
448 __u32 loss_corr; /* packet loss correlation */
449 __u32 dup_corr; /* duplicate correlation */
450};
451
452#define NETEM_DIST_SCALE 8192
453
454#endif
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