1 #ifndef __LINUX_PKT_SCHED_H
2 #define __LINUX_PKT_SCHED_H
4 #include <linux/types.h>
6 /* Logical priority bands not depending on specific packet scheduler.
7 Every scheduler will map them to real traffic classes, if it has
8 no more precise mechanism to classify packets.
10 These numbers have no special meaning, though their coincidence
11 with obsolete IPv6 values is not occasional :-). New IPv6 drafts
12 preferred full anarchy inspired by diffserv group.
14 Note: TC_PRIO_BESTEFFORT does not mean that it is the most unhappy
15 class, actually, as rule it will be handled with more care than
19 #define TC_PRIO_BESTEFFORT 0
20 #define TC_PRIO_FILLER 1
21 #define TC_PRIO_BULK 2
22 #define TC_PRIO_INTERACTIVE_BULK 4
23 #define TC_PRIO_INTERACTIVE 6
24 #define TC_PRIO_CONTROL 7
26 #define TC_PRIO_MAX 15
28 /* Generic queue statistics, available for all the elements.
29 Particular schedulers may have also their private records.
33 __u64 bytes
; /* Number of enqueued bytes */
34 __u32 packets
; /* Number of enqueued packets */
35 __u32 drops
; /* Packets dropped because of lack of resources */
36 __u32 overlimits
; /* Number of throttle events when this
37 * flow goes out of allocated bandwidth */
38 __u32 bps
; /* Current flow byte rate */
39 __u32 pps
; /* Current flow packet rate */
46 unsigned char ewma_log
;
52 All the traffic control objects have 32bit identifiers, or "handles".
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.
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.
63 Macros to manipulate handles:
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))
72 #define TC_H_UNSPEC (0U)
73 #define TC_H_ROOT (0xFFFFFFFFU)
74 #define TC_H_INGRESS (0xFFFFFFF1U)
77 unsigned char cell_log
;
78 unsigned char __reserved
;
79 unsigned short overhead
;
85 #define TC_RTAB_SIZE 1024
88 unsigned char cell_log
;
89 unsigned char size_log
;
92 unsigned int linklayer
;
105 #define TCA_STAB_MAX (__TCA_STAB_MAX - 1)
109 struct tc_fifo_qopt
{
110 __u32 limit
; /* Queue length: bytes for bfifo, packets for pfifo */
115 #define TCQ_PRIO_BANDS 16
116 #define TCQ_MIN_PRIO_BANDS 2
118 struct tc_prio_qopt
{
119 int bands
; /* Number of bands */
120 __u8 priomap
[TC_PRIO_MAX
+1]; /* Map: logical priority -> PRIO band */
125 struct tc_multiq_qopt
{
126 __u16 bands
; /* Number of bands */
127 __u16 max_bands
; /* Maximum number of queues */
133 struct tc_ratespec rate
;
134 struct tc_ratespec peakrate
;
148 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
153 /* TEQL does not require any parameters */
158 unsigned quantum
; /* Bytes per round allocated to flow */
159 int perturb_period
; /* Period of hash perturbation */
160 __u32 limit
; /* Maximal packets in queue */
161 unsigned divisor
; /* Hash divisor */
162 unsigned flows
; /* Maximal number of flows */
165 struct tc_sfq_xstats
{
170 * NOTE: limit, divisor and flows are hardwired to code at the moment.
172 * limit=flows=128, divisor=1024;
174 * The only reason for this is efficiency, it is possible
175 * to change these parameters in compile time.
187 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
190 __u32 limit
; /* HARD maximal queue length (bytes) */
191 __u32 qth_min
; /* Min average length threshold (bytes) */
192 __u32 qth_max
; /* Max average length threshold (bytes) */
193 unsigned char Wlog
; /* log(W) */
194 unsigned char Plog
; /* log(P_max/(qth_max-qth_min)) */
195 unsigned char Scell_log
; /* cell size for idle damping */
198 #define TC_RED_HARDDROP 2
201 struct tc_red_xstats
{
202 __u32 early
; /* Early drops */
203 __u32 pdrop
; /* Drops due to queue limits */
204 __u32 other
; /* Drops due to drop() calls */
205 __u32 marked
; /* Marked packets */
220 #define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
222 struct tc_gred_qopt
{
223 __u32 limit
; /* HARD maximal queue length (bytes) */
224 __u32 qth_min
; /* Min average length threshold (bytes) */
225 __u32 qth_max
; /* Max average length threshold (bytes) */
226 __u32 DP
; /* up to 2^32 DPs */
233 __u8 Wlog
; /* log(W) */
234 __u8 Plog
; /* log(P_max/(qth_max-qth_min)) */
235 __u8 Scell_log
; /* cell size for idle damping */
236 __u8 prio
; /* prio of this VQ */
242 struct tc_gred_sopt
{
259 #define TCA_CHOKE_MAX (__TCA_CHOKE_MAX - 1)
261 struct tc_choke_qopt
{
262 __u32 limit
; /* Hard queue length (packets) */
263 __u32 qth_min
; /* Min average threshold (packets) */
264 __u32 qth_max
; /* Max average threshold (packets) */
265 unsigned char Wlog
; /* log(W) */
266 unsigned char Plog
; /* log(P_max/(qth_max-qth_min)) */
267 unsigned char Scell_log
; /* cell size for idle damping */
268 unsigned char flags
; /* see RED flags */
271 struct tc_choke_xstats
{
272 __u32 early
; /* Early drops */
273 __u32 pdrop
; /* Drops due to queue limits */
274 __u32 other
; /* Drops due to drop() calls */
275 __u32 marked
; /* Marked packets */
276 __u32 matched
; /* Drops due to flow match */
280 #define TC_HTB_NUMPRIO 8
281 #define TC_HTB_MAXDEPTH 8
282 #define TC_HTB_PROTOVER 3 /* the same as HTB and TC's major */
285 struct tc_ratespec rate
;
286 struct tc_ratespec ceil
;
290 __u32 level
; /* out only */
294 __u32 version
; /* to match HTB/TC */
295 __u32 rate2quantum
; /* bps->quantum divisor */
296 __u32 defcls
; /* default class number */
297 __u32 debug
; /* debug flags */
300 __u32 direct_pkts
; /* count of non shaped packets */
311 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
313 struct tc_htb_xstats
{
316 __u32 giants
; /* too big packets (rate will not be accurate) */
323 struct tc_hfsc_qopt
{
324 __u16 defcls
; /* default class */
327 struct tc_service_curve
{
328 __u32 m1
; /* slope of the first segment in bps */
329 __u32 d
; /* x-projection of the first segment in us */
330 __u32 m2
; /* slope of the second segment in bps */
333 struct tc_hfsc_stats
{
334 __u64 work
; /* total work done */
335 __u64 rtwork
; /* work done by real-time criteria */
336 __u32 period
; /* current period */
337 __u32 level
; /* class level in hierarchy */
348 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
353 #define TC_CBQ_MAXPRIO 8
354 #define TC_CBQ_MAXLEVEL 8
355 #define TC_CBQ_DEF_EWMA 5
357 struct tc_cbq_lssopt
{
358 unsigned char change
;
360 #define TCF_CBQ_LSS_BOUNDED 1
361 #define TCF_CBQ_LSS_ISOLATED 2
362 unsigned char ewma_log
;
364 #define TCF_CBQ_LSS_FLAGS 1
365 #define TCF_CBQ_LSS_EWMA 2
366 #define TCF_CBQ_LSS_MAXIDLE 4
367 #define TCF_CBQ_LSS_MINIDLE 8
368 #define TCF_CBQ_LSS_OFFTIME 0x10
369 #define TCF_CBQ_LSS_AVPKT 0x20
376 struct tc_cbq_wrropt
{
378 unsigned char priority
;
379 unsigned char cpriority
;
380 unsigned char __reserved
;
386 unsigned char strategy
;
387 #define TC_CBQ_OVL_CLASSIC 0
388 #define TC_CBQ_OVL_DELAY 1
389 #define TC_CBQ_OVL_LOWPRIO 2
390 #define TC_CBQ_OVL_DROP 3
391 #define TC_CBQ_OVL_RCLASSIC 4
392 unsigned char priority2
;
397 struct tc_cbq_police
{
398 unsigned char police
;
399 unsigned char __res1
;
400 unsigned short __res2
;
409 struct tc_cbq_xstats
{
421 TCA_CBQ_OVL_STRATEGY
,
428 #define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
435 TCA_DSMARK_DEFAULT_INDEX
,
436 TCA_DSMARK_SET_TC_INDEX
,
442 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
448 TCA_ATM_FD
, /* file/socket descriptor */
449 TCA_ATM_PTR
, /* pointer to descriptor - later */
450 TCA_ATM_HDR
, /* LL header */
451 TCA_ATM_EXCESS
, /* excess traffic class (0 for CLP) */
452 TCA_ATM_ADDR
, /* PVC address (for output only) */
453 TCA_ATM_STATE
, /* VC state (ATM_VS_*; for output only) */
457 #define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
459 /* Network emulator */
464 TCA_NETEM_DELAY_DIST
,
471 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
473 struct tc_netem_qopt
{
474 __u32 latency
; /* added delay (us) */
475 __u32 limit
; /* fifo limit (packets) */
476 __u32 loss
; /* random packet loss (0=none ~0=100%) */
477 __u32 gap
; /* re-ordering gap (0 for none) */
478 __u32 duplicate
; /* random packet dup (0=none ~0=100%) */
479 __u32 jitter
; /* random jitter in latency (us) */
482 struct tc_netem_corr
{
483 __u32 delay_corr
; /* delay correlation */
484 __u32 loss_corr
; /* packet loss correlation */
485 __u32 dup_corr
; /* duplicate correlation */
488 struct tc_netem_reorder
{
493 struct tc_netem_corrupt
{
500 NETEM_LOSS_GI
, /* General Intuitive - 4 state model */
501 NETEM_LOSS_GE
, /* Gilbert Elliot models */
504 #define NETEM_LOSS_MAX (__NETEM_LOSS_MAX - 1)
506 /* State transition probabilities for 4 state model */
507 struct tc_netem_gimodel
{
515 /* Gilbert-Elliot models */
516 struct tc_netem_gemodel
{
523 #define NETEM_DIST_SCALE 8192
524 #define NETEM_DIST_MAX 16384
534 #define TCA_DRR_MAX (__TCA_DRR_MAX - 1)
536 struct tc_drr_stats
{
541 #define TC_QOPT_BITMASK 15
542 #define TC_QOPT_MAX_QUEUE 16
544 struct tc_mqprio_qopt
{
546 __u8 prio_tc_map
[TC_QOPT_BITMASK
+ 1];
548 __u16 count
[TC_QOPT_MAX_QUEUE
];
549 __u16 offset
[TC_QOPT_MAX_QUEUE
];
560 #define TCA_SFB_MAX (__TCA_SFB_MAX - 1)
563 * Note: increment, decrement are Q0.16 fixed-point values.
566 __u32 rehash_interval
; /* delay between hash move, in ms */
567 __u32 warmup_time
; /* double buffering warmup time in ms (warmup_time < rehash_interval) */
568 __u32 max
; /* max len of qlen_min */
569 __u32 bin_size
; /* maximum queue length per bin */
570 __u32 increment
; /* probability increment, (d1 in Blue) */
571 __u32 decrement
; /* probability decrement, (d2 in Blue) */
572 __u32 limit
; /* max SFB queue length */
573 __u32 penalty_rate
; /* inelastic flows are rate limited to 'rate' pps */
577 struct tc_sfb_xstats
{
582 __u32 childdrop
; /* drops in child qdisc */
589 #define SFB_MAX_PROB 0xFFFF
599 #define TCA_QFQ_MAX (__TCA_QFQ_MAX - 1)
601 struct tc_qfq_stats
{
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