1 #ifndef __LINUX_PKT_SCHED_H
2 #define __LINUX_PKT_SCHED_H
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.
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.
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
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
24 #define TC_PRIO_MAX 15
26 /* Generic queue statistics, available for all the elements.
27 Particular schedulers may have also their private records.
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 */
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)
78 unsigned char cell_log
;
79 unsigned char __reserved
;
80 unsigned short feature
;
90 __u32 limit
; /* Queue length: bytes for bfifo, packets for pfifo */
95 #define TCQ_PRIO_BANDS 16
96 #define TCQ_MIN_PRIO_BANDS 2
100 int bands
; /* Number of bands */
101 __u8 priomap
[TC_PRIO_MAX
+1]; /* Map: logical priority -> PRIO band */
108 struct tc_ratespec rate
;
109 struct tc_ratespec peakrate
;
124 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
129 /* TEQL does not require any parameters */
135 unsigned quantum
; /* Bytes per round allocated to flow */
136 int perturb_period
; /* Period of hash perturbation */
137 __u32 limit
; /* Maximal packets in queue */
138 unsigned divisor
; /* Hash divisor */
139 unsigned flows
; /* Maximal number of flows */
143 * NOTE: limit, divisor and flows are hardwired to code at the moment.
145 * limit=flows=128, divisor=1024;
147 * The only reason for this is efficiency, it is possible
148 * to change these parameters in compile time.
161 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
165 __u32 limit
; /* HARD maximal queue length (bytes) */
166 __u32 qth_min
; /* Min average length threshold (bytes) */
167 __u32 qth_max
; /* Max average length threshold (bytes) */
168 unsigned char Wlog
; /* log(W) */
169 unsigned char Plog
; /* log(P_max/(qth_max-qth_min)) */
170 unsigned char Scell_log
; /* cell size for idle damping */
173 #define TC_RED_HARDDROP 2
178 __u32 early
; /* Early drops */
179 __u32 pdrop
; /* Drops due to queue limits */
180 __u32 other
; /* Drops due to drop() calls */
181 __u32 marked
; /* Marked packets */
197 #define TCA_GRED_MAX (__TCA_GRED_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 __u32 DP
; /* upto 2^32 DPs */
211 __u8 Wlog
; /* log(W) */
212 __u8 Plog
; /* log(P_max/(qth_max-qth_min)) */
213 __u8 Scell_log
; /* cell size for idle damping */
214 __u8 prio
; /* prio of this VQ */
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 */
236 struct tc_ratespec rate
;
237 struct tc_ratespec ceil
;
241 __u32 level
; /* out only */
246 __u32 version
; /* to match HTB/TC */
247 __u32 rate2quantum
; /* bps->quantum divisor */
248 __u32 defcls
; /* default class number */
249 __u32 debug
; /* debug flags */
252 __u32 direct_pkts
; /* count of non shapped packets */
264 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
270 __u32 giants
; /* too big packets (rate will not be accurate) */
279 __u16 defcls
; /* default class */
282 struct tc_service_curve
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 */
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 */
306 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
311 #define TC_CBQ_MAXPRIO 8
312 #define TC_CBQ_MAXLEVEL 8
313 #define TC_CBQ_DEF_EWMA 5
317 unsigned char change
;
319 #define TCF_CBQ_LSS_BOUNDED 1
320 #define TCF_CBQ_LSS_ISOLATED 2
321 unsigned char ewma_log
;
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
338 unsigned char priority
;
339 unsigned char cpriority
;
340 unsigned char __reserved
;
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
;
360 unsigned char police
;
361 unsigned char __res1
;
362 unsigned short __res2
;
386 TCA_CBQ_OVL_STRATEGY
,
393 #define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
400 TCA_DSMARK_DEFAULT_INDEX
,
401 TCA_DSMARK_SET_TC_INDEX
,
407 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
413 TCA_ATM_FD
, /* file/socket descriptor */
414 TCA_ATM_PTR
, /* pointer to descriptor - later */
415 TCA_ATM_HDR
, /* LL header */
416 TCA_ATM_EXCESS
, /* excess traffic class (0 for CLP) */
417 TCA_ATM_ADDR
, /* PVC address (for output only) */
418 TCA_ATM_STATE
, /* VC state (ATM_VS_*; for output only) */
422 #define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
424 /* Network emulator */
430 TCA_NETEM_DELAY_DIST
,
436 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
440 __u32 latency
; /* added delay (us) */
441 __u32 limit
; /* fifo limit (packets) */
442 __u32 loss
; /* random packet loss (0=none ~0=100%) */
443 __u32 gap
; /* re-ordering gap (0 for none) */
444 __u32 duplicate
; /* random packet dup (0=none ~0=100%) */
445 __u32 jitter
; /* random jitter in latency (us) */
450 __u32 delay_corr
; /* delay correlation */
451 __u32 loss_corr
; /* packet loss correlation */
452 __u32 dup_corr
; /* duplicate correlation */
455 struct tc_netem_reorder
461 struct tc_netem_corrupt
467 #define NETEM_DIST_SCALE 8192
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