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 */
132 #define TCQ_PLUG_BUFFER 0
133 #define TCQ_PLUG_RELEASE_ONE 1
134 #define TCQ_PLUG_RELEASE_INDEFINITE 2
135 #define TCQ_PLUG_LIMIT 3
137 struct tc_plug_qopt
{
138 /* TCQ_PLUG_BUFFER: Inset a plug into the queue and
139 * buffer any incoming packets
140 * TCQ_PLUG_RELEASE_ONE: Dequeue packets from queue head
141 * to beginning of the next plug.
142 * TCQ_PLUG_RELEASE_INDEFINITE: Dequeue all packets from queue.
143 * Stop buffering packets until the next TCQ_PLUG_BUFFER
144 * command is received (just act as a pass-thru queue).
145 * TCQ_PLUG_LIMIT: Increase/decrease queue size
154 struct tc_ratespec rate
;
155 struct tc_ratespec peakrate
;
169 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
174 /* TEQL does not require any parameters */
179 unsigned quantum
; /* Bytes per round allocated to flow */
180 int perturb_period
; /* Period of hash perturbation */
181 __u32 limit
; /* Maximal packets in queue */
182 unsigned divisor
; /* Hash divisor */
183 unsigned flows
; /* Maximal number of flows */
186 struct tc_sfqred_stats
{
187 __u32 prob_drop
; /* Early drops, below max threshold */
188 __u32 forced_drop
; /* Early drops, after max threshold */
189 __u32 prob_mark
; /* Marked packets, below max threshold */
190 __u32 forced_mark
; /* Marked packets, after max threshold */
191 __u32 prob_mark_head
; /* Marked packets, below max threshold */
192 __u32 forced_mark_head
;/* Marked packets, after max threshold */
195 struct tc_sfq_qopt_v1
{
196 struct tc_sfq_qopt v0
;
197 unsigned int depth
; /* max number of packets per flow */
198 unsigned int headdrop
;
199 /* SFQRED parameters */
200 __u32 limit
; /* HARD maximal flow queue length (bytes) */
201 __u32 qth_min
; /* Min average length threshold (bytes) */
202 __u32 qth_max
; /* Max average length threshold (bytes) */
203 unsigned char Wlog
; /* log(W) */
204 unsigned char Plog
; /* log(P_max/(qth_max-qth_min)) */
205 unsigned char Scell_log
; /* cell size for idle damping */
207 __u32 max_P
; /* probability, high resolution */
209 struct tc_sfqred_stats stats
;
213 struct tc_sfq_xstats
{
227 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
230 __u32 limit
; /* HARD maximal queue length (bytes) */
231 __u32 qth_min
; /* Min average length threshold (bytes) */
232 __u32 qth_max
; /* Max average length threshold (bytes) */
233 unsigned char Wlog
; /* log(W) */
234 unsigned char Plog
; /* log(P_max/(qth_max-qth_min)) */
235 unsigned char Scell_log
; /* cell size for idle damping */
238 #define TC_RED_HARDDROP 2
239 #define TC_RED_ADAPTATIVE 4
242 struct tc_red_xstats
{
243 __u32 early
; /* Early drops */
244 __u32 pdrop
; /* Drops due to queue limits */
245 __u32 other
; /* Drops due to drop() calls */
246 __u32 marked
; /* Marked packets */
262 #define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
264 struct tc_gred_qopt
{
265 __u32 limit
; /* HARD maximal queue length (bytes) */
266 __u32 qth_min
; /* Min average length threshold (bytes) */
267 __u32 qth_max
; /* Max average length threshold (bytes) */
268 __u32 DP
; /* up to 2^32 DPs */
275 __u8 Wlog
; /* log(W) */
276 __u8 Plog
; /* log(P_max/(qth_max-qth_min)) */
277 __u8 Scell_log
; /* cell size for idle damping */
278 __u8 prio
; /* prio of this VQ */
284 struct tc_gred_sopt
{
302 #define TCA_CHOKE_MAX (__TCA_CHOKE_MAX - 1)
304 struct tc_choke_qopt
{
305 __u32 limit
; /* Hard queue length (packets) */
306 __u32 qth_min
; /* Min average threshold (packets) */
307 __u32 qth_max
; /* Max average threshold (packets) */
308 unsigned char Wlog
; /* log(W) */
309 unsigned char Plog
; /* log(P_max/(qth_max-qth_min)) */
310 unsigned char Scell_log
; /* cell size for idle damping */
311 unsigned char flags
; /* see RED flags */
314 struct tc_choke_xstats
{
315 __u32 early
; /* Early drops */
316 __u32 pdrop
; /* Drops due to queue limits */
317 __u32 other
; /* Drops due to drop() calls */
318 __u32 marked
; /* Marked packets */
319 __u32 matched
; /* Drops due to flow match */
323 #define TC_HTB_NUMPRIO 8
324 #define TC_HTB_MAXDEPTH 8
325 #define TC_HTB_PROTOVER 3 /* the same as HTB and TC's major */
328 struct tc_ratespec rate
;
329 struct tc_ratespec ceil
;
333 __u32 level
; /* out only */
337 __u32 version
; /* to match HTB/TC */
338 __u32 rate2quantum
; /* bps->quantum divisor */
339 __u32 defcls
; /* default class number */
340 __u32 debug
; /* debug flags */
343 __u32 direct_pkts
; /* count of non shaped packets */
354 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
356 struct tc_htb_xstats
{
359 __u32 giants
; /* too big packets (rate will not be accurate) */
366 struct tc_hfsc_qopt
{
367 __u16 defcls
; /* default class */
370 struct tc_service_curve
{
371 __u32 m1
; /* slope of the first segment in bps */
372 __u32 d
; /* x-projection of the first segment in us */
373 __u32 m2
; /* slope of the second segment in bps */
376 struct tc_hfsc_stats
{
377 __u64 work
; /* total work done */
378 __u64 rtwork
; /* work done by real-time criteria */
379 __u32 period
; /* current period */
380 __u32 level
; /* class level in hierarchy */
391 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
396 #define TC_CBQ_MAXPRIO 8
397 #define TC_CBQ_MAXLEVEL 8
398 #define TC_CBQ_DEF_EWMA 5
400 struct tc_cbq_lssopt
{
401 unsigned char change
;
403 #define TCF_CBQ_LSS_BOUNDED 1
404 #define TCF_CBQ_LSS_ISOLATED 2
405 unsigned char ewma_log
;
407 #define TCF_CBQ_LSS_FLAGS 1
408 #define TCF_CBQ_LSS_EWMA 2
409 #define TCF_CBQ_LSS_MAXIDLE 4
410 #define TCF_CBQ_LSS_MINIDLE 8
411 #define TCF_CBQ_LSS_OFFTIME 0x10
412 #define TCF_CBQ_LSS_AVPKT 0x20
419 struct tc_cbq_wrropt
{
421 unsigned char priority
;
422 unsigned char cpriority
;
423 unsigned char __reserved
;
429 unsigned char strategy
;
430 #define TC_CBQ_OVL_CLASSIC 0
431 #define TC_CBQ_OVL_DELAY 1
432 #define TC_CBQ_OVL_LOWPRIO 2
433 #define TC_CBQ_OVL_DROP 3
434 #define TC_CBQ_OVL_RCLASSIC 4
435 unsigned char priority2
;
440 struct tc_cbq_police
{
441 unsigned char police
;
442 unsigned char __res1
;
443 unsigned short __res2
;
452 struct tc_cbq_xstats
{
464 TCA_CBQ_OVL_STRATEGY
,
471 #define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
478 TCA_DSMARK_DEFAULT_INDEX
,
479 TCA_DSMARK_SET_TC_INDEX
,
485 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
491 TCA_ATM_FD
, /* file/socket descriptor */
492 TCA_ATM_PTR
, /* pointer to descriptor - later */
493 TCA_ATM_HDR
, /* LL header */
494 TCA_ATM_EXCESS
, /* excess traffic class (0 for CLP) */
495 TCA_ATM_ADDR
, /* PVC address (for output only) */
496 TCA_ATM_STATE
, /* VC state (ATM_VS_*; for output only) */
500 #define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
502 /* Network emulator */
507 TCA_NETEM_DELAY_DIST
,
515 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
517 struct tc_netem_qopt
{
518 __u32 latency
; /* added delay (us) */
519 __u32 limit
; /* fifo limit (packets) */
520 __u32 loss
; /* random packet loss (0=none ~0=100%) */
521 __u32 gap
; /* re-ordering gap (0 for none) */
522 __u32 duplicate
; /* random packet dup (0=none ~0=100%) */
523 __u32 jitter
; /* random jitter in latency (us) */
526 struct tc_netem_corr
{
527 __u32 delay_corr
; /* delay correlation */
528 __u32 loss_corr
; /* packet loss correlation */
529 __u32 dup_corr
; /* duplicate correlation */
532 struct tc_netem_reorder
{
537 struct tc_netem_corrupt
{
542 struct tc_netem_rate
{
543 __u32 rate
; /* byte/s */
544 __s32 packet_overhead
;
551 NETEM_LOSS_GI
, /* General Intuitive - 4 state model */
552 NETEM_LOSS_GE
, /* Gilbert Elliot models */
555 #define NETEM_LOSS_MAX (__NETEM_LOSS_MAX - 1)
557 /* State transition probabilities for 4 state model */
558 struct tc_netem_gimodel
{
566 /* Gilbert-Elliot models */
567 struct tc_netem_gemodel
{
574 #define NETEM_DIST_SCALE 8192
575 #define NETEM_DIST_MAX 16384
585 #define TCA_DRR_MAX (__TCA_DRR_MAX - 1)
587 struct tc_drr_stats
{
592 #define TC_QOPT_BITMASK 15
593 #define TC_QOPT_MAX_QUEUE 16
595 struct tc_mqprio_qopt
{
597 __u8 prio_tc_map
[TC_QOPT_BITMASK
+ 1];
599 __u16 count
[TC_QOPT_MAX_QUEUE
];
600 __u16 offset
[TC_QOPT_MAX_QUEUE
];
611 #define TCA_SFB_MAX (__TCA_SFB_MAX - 1)
614 * Note: increment, decrement are Q0.16 fixed-point values.
617 __u32 rehash_interval
; /* delay between hash move, in ms */
618 __u32 warmup_time
; /* double buffering warmup time in ms (warmup_time < rehash_interval) */
619 __u32 max
; /* max len of qlen_min */
620 __u32 bin_size
; /* maximum queue length per bin */
621 __u32 increment
; /* probability increment, (d1 in Blue) */
622 __u32 decrement
; /* probability decrement, (d2 in Blue) */
623 __u32 limit
; /* max SFB queue length */
624 __u32 penalty_rate
; /* inelastic flows are rate limited to 'rate' pps */
628 struct tc_sfb_xstats
{
633 __u32 childdrop
; /* drops in child qdisc */
640 #define SFB_MAX_PROB 0xFFFF
650 #define TCA_QFQ_MAX (__TCA_QFQ_MAX - 1)
652 struct tc_qfq_stats
{