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.
34 __u64 bytes; /* NUmber of enqueues bytes */
35 __u32 packets; /* Number of enqueued packets */
36 __u32 drops; /* Packets dropped because of lack of resources */
37 __u32 overlimits; /* Number of throttle events when this
38 * flow goes out of allocated bandwidth */
39 __u32 bps; /* Current flow byte rate */
40 __u32 pps; /* Current flow packet rate */
48 unsigned char ewma_log;
54 All the traffic control objects have 32bit identifiers, or "handles".
56 They can be considered as opaque numbers from user API viewpoint,
57 but actually they always consist of two fields: major and
58 minor numbers, which are interpreted by kernel specially,
59 that may be used by applications, though not recommended.
61 F.e. qdisc handles always have minor number equal to zero,
62 classes (or flows) have major equal to parent qdisc major, and
63 minor uniquely identifying class inside qdisc.
65 Macros to manipulate handles:
68 #define TC_H_MAJ_MASK (0xFFFF0000U)
69 #define TC_H_MIN_MASK (0x0000FFFFU)
70 #define TC_H_MAJ(h) ((h)&TC_H_MAJ_MASK)
71 #define TC_H_MIN(h) ((h)&TC_H_MIN_MASK)
72 #define TC_H_MAKE(maj,min) (((maj)&TC_H_MAJ_MASK)|((min)&TC_H_MIN_MASK))
74 #define TC_H_UNSPEC (0U)
75 #define TC_H_ROOT (0xFFFFFFFFU)
76 #define TC_H_INGRESS (0xFFFFFFF1U)
80 unsigned char cell_log;
81 unsigned char __reserved;
82 unsigned short overhead;
88 #define TC_RTAB_SIZE 1024
91 unsigned char cell_log;
92 unsigned char size_log;
95 unsigned int linklayer;
108 #define TCA_STAB_MAX (__TCA_STAB_MAX - 1)
114 __u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
119 #define TCQ_PRIO_BANDS 16
120 #define TCQ_MIN_PRIO_BANDS 2
124 int bands; /* Number of bands */
125 __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
130 struct tc_multiq_qopt {
131 __u16 bands; /* Number of bands */
132 __u16 max_bands; /* Maximum number of queues */
139 struct tc_ratespec rate;
140 struct tc_ratespec peakrate;
155 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
160 /* TEQL does not require any parameters */
166 unsigned quantum; /* Bytes per round allocated to flow */
167 int perturb_period; /* Period of hash perturbation */
168 __u32 limit; /* Maximal packets in queue */
169 unsigned divisor; /* Hash divisor */
170 unsigned flows; /* Maximal number of flows */
179 * NOTE: limit, divisor and flows are hardwired to code at the moment.
181 * limit=flows=128, divisor=1024;
183 * The only reason for this is efficiency, it is possible
184 * to change these parameters in compile time.
197 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
201 __u32 limit; /* HARD maximal queue length (bytes) */
202 __u32 qth_min; /* Min average length threshold (bytes) */
203 __u32 qth_max; /* Max average length threshold (bytes) */
204 unsigned char Wlog; /* log(W) */
205 unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
206 unsigned char Scell_log; /* cell size for idle damping */
209 #define TC_RED_HARDDROP 2
214 __u32 early; /* Early drops */
215 __u32 pdrop; /* Drops due to queue limits */
216 __u32 other; /* Drops due to drop() calls */
217 __u32 marked; /* Marked packets */
233 #define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
237 __u32 limit; /* HARD maximal queue length (bytes) */
238 __u32 qth_min; /* Min average length threshold (bytes) */
239 __u32 qth_max; /* Max average length threshold (bytes) */
240 __u32 DP; /* upto 2^32 DPs */
247 __u8 Wlog; /* log(W) */
248 __u8 Plog; /* log(P_max/(qth_max-qth_min)) */
249 __u8 Scell_log; /* cell size for idle damping */
250 __u8 prio; /* prio of this VQ */
266 #define TC_HTB_NUMPRIO 8
267 #define TC_HTB_MAXDEPTH 8
268 #define TC_HTB_PROTOVER 3 /* the same as HTB and TC's major */
272 struct tc_ratespec rate;
273 struct tc_ratespec ceil;
277 __u32 level; /* out only */
282 __u32 version; /* to match HTB/TC */
283 __u32 rate2quantum; /* bps->quantum divisor */
284 __u32 defcls; /* default class number */
285 __u32 debug; /* debug flags */
288 __u32 direct_pkts; /* count of non shapped packets */
300 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
306 __u32 giants; /* too big packets (rate will not be accurate) */
315 __u16 defcls; /* default class */
318 struct tc_service_curve
320 __u32 m1; /* slope of the first segment in bps */
321 __u32 d; /* x-projection of the first segment in us */
322 __u32 m2; /* slope of the second segment in bps */
327 __u64 work; /* total work done */
328 __u64 rtwork; /* work done by real-time criteria */
329 __u32 period; /* current period */
330 __u32 level; /* class level in hierarchy */
342 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
347 #define TC_CBQ_MAXPRIO 8
348 #define TC_CBQ_MAXLEVEL 8
349 #define TC_CBQ_DEF_EWMA 5
353 unsigned char change;
355 #define TCF_CBQ_LSS_BOUNDED 1
356 #define TCF_CBQ_LSS_ISOLATED 2
357 unsigned char ewma_log;
359 #define TCF_CBQ_LSS_FLAGS 1
360 #define TCF_CBQ_LSS_EWMA 2
361 #define TCF_CBQ_LSS_MAXIDLE 4
362 #define TCF_CBQ_LSS_MINIDLE 8
363 #define TCF_CBQ_LSS_OFFTIME 0x10
364 #define TCF_CBQ_LSS_AVPKT 0x20
374 unsigned char priority;
375 unsigned char cpriority;
376 unsigned char __reserved;
383 unsigned char strategy;
384 #define TC_CBQ_OVL_CLASSIC 0
385 #define TC_CBQ_OVL_DELAY 1
386 #define TC_CBQ_OVL_LOWPRIO 2
387 #define TC_CBQ_OVL_DROP 3
388 #define TC_CBQ_OVL_RCLASSIC 4
389 unsigned char priority2;
396 unsigned char police;
397 unsigned char __res1;
398 unsigned short __res2;
422 TCA_CBQ_OVL_STRATEGY,
429 #define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
436 TCA_DSMARK_DEFAULT_INDEX,
437 TCA_DSMARK_SET_TC_INDEX,
443 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
449 TCA_ATM_FD, /* file/socket descriptor */
450 TCA_ATM_PTR, /* pointer to descriptor - later */
451 TCA_ATM_HDR, /* LL header */
452 TCA_ATM_EXCESS, /* excess traffic class (0 for CLP) */
453 TCA_ATM_ADDR, /* PVC address (for output only) */
454 TCA_ATM_STATE, /* VC state (ATM_VS_*; for output only) */
458 #define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
460 /* Network emulator */
466 TCA_NETEM_DELAY_DIST,
472 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
476 __u32 latency; /* added delay (us) */
477 __u32 limit; /* fifo limit (packets) */
478 __u32 loss; /* random packet loss (0=none ~0=100%) */
479 __u32 gap; /* re-ordering gap (0 for none) */
480 __u32 duplicate; /* random packet dup (0=none ~0=100%) */
481 __u32 jitter; /* random jitter in latency (us) */
486 __u32 delay_corr; /* delay correlation */
487 __u32 loss_corr; /* packet loss correlation */
488 __u32 dup_corr; /* duplicate correlation */
491 struct tc_netem_reorder
497 struct tc_netem_corrupt
503 #define NETEM_DIST_SCALE 8192
514 #define TCA_DRR_MAX (__TCA_DRR_MAX - 1)