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 overhead;
86 #define TC_RTAB_SIZE 1024
92 __u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
97 #define TCQ_PRIO_BANDS 16
98 #define TCQ_MIN_PRIO_BANDS 2
102 int bands; /* Number of bands */
103 __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
110 struct tc_ratespec rate;
111 struct tc_ratespec peakrate;
126 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
131 /* TEQL does not require any parameters */
137 unsigned quantum; /* Bytes per round allocated to flow */
138 int perturb_period; /* Period of hash perturbation */
139 __u32 limit; /* Maximal packets in queue */
140 unsigned divisor; /* Hash divisor */
141 unsigned flows; /* Maximal number of flows */
150 * NOTE: limit, divisor and flows are hardwired to code at the moment.
152 * limit=flows=128, divisor=1024;
154 * The only reason for this is efficiency, it is possible
155 * to change these parameters in compile time.
168 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
172 __u32 limit; /* HARD maximal queue length (bytes) */
173 __u32 qth_min; /* Min average length threshold (bytes) */
174 __u32 qth_max; /* Max average length threshold (bytes) */
175 unsigned char Wlog; /* log(W) */
176 unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
177 unsigned char Scell_log; /* cell size for idle damping */
180 #define TC_RED_HARDDROP 2
185 __u32 early; /* Early drops */
186 __u32 pdrop; /* Drops due to queue limits */
187 __u32 other; /* Drops due to drop() calls */
188 __u32 marked; /* Marked packets */
204 #define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
208 __u32 limit; /* HARD maximal queue length (bytes) */
209 __u32 qth_min; /* Min average length threshold (bytes) */
210 __u32 qth_max; /* Max average length threshold (bytes) */
211 __u32 DP; /* upto 2^32 DPs */
218 __u8 Wlog; /* log(W) */
219 __u8 Plog; /* log(P_max/(qth_max-qth_min)) */
220 __u8 Scell_log; /* cell size for idle damping */
221 __u8 prio; /* prio of this VQ */
237 #define TC_HTB_NUMPRIO 8
238 #define TC_HTB_MAXDEPTH 8
239 #define TC_HTB_PROTOVER 3 /* the same as HTB and TC's major */
243 struct tc_ratespec rate;
244 struct tc_ratespec ceil;
248 __u32 level; /* out only */
253 __u32 version; /* to match HTB/TC */
254 __u32 rate2quantum; /* bps->quantum divisor */
255 __u32 defcls; /* default class number */
256 __u32 debug; /* debug flags */
259 __u32 direct_pkts; /* count of non shapped packets */
271 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
277 __u32 giants; /* too big packets (rate will not be accurate) */
286 __u16 defcls; /* default class */
289 struct tc_service_curve
291 __u32 m1; /* slope of the first segment in bps */
292 __u32 d; /* x-projection of the first segment in us */
293 __u32 m2; /* slope of the second segment in bps */
298 __u64 work; /* total work done */
299 __u64 rtwork; /* work done by real-time criteria */
300 __u32 period; /* current period */
301 __u32 level; /* class level in hierarchy */
313 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
318 #define TC_CBQ_MAXPRIO 8
319 #define TC_CBQ_MAXLEVEL 8
320 #define TC_CBQ_DEF_EWMA 5
324 unsigned char change;
326 #define TCF_CBQ_LSS_BOUNDED 1
327 #define TCF_CBQ_LSS_ISOLATED 2
328 unsigned char ewma_log;
330 #define TCF_CBQ_LSS_FLAGS 1
331 #define TCF_CBQ_LSS_EWMA 2
332 #define TCF_CBQ_LSS_MAXIDLE 4
333 #define TCF_CBQ_LSS_MINIDLE 8
334 #define TCF_CBQ_LSS_OFFTIME 0x10
335 #define TCF_CBQ_LSS_AVPKT 0x20
345 unsigned char priority;
346 unsigned char cpriority;
347 unsigned char __reserved;
354 unsigned char strategy;
355 #define TC_CBQ_OVL_CLASSIC 0
356 #define TC_CBQ_OVL_DELAY 1
357 #define TC_CBQ_OVL_LOWPRIO 2
358 #define TC_CBQ_OVL_DROP 3
359 #define TC_CBQ_OVL_RCLASSIC 4
360 unsigned char priority2;
367 unsigned char police;
368 unsigned char __res1;
369 unsigned short __res2;
393 TCA_CBQ_OVL_STRATEGY,
400 #define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
407 TCA_DSMARK_DEFAULT_INDEX,
408 TCA_DSMARK_SET_TC_INDEX,
414 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
420 TCA_ATM_FD, /* file/socket descriptor */
421 TCA_ATM_PTR, /* pointer to descriptor - later */
422 TCA_ATM_HDR, /* LL header */
423 TCA_ATM_EXCESS, /* excess traffic class (0 for CLP) */
424 TCA_ATM_ADDR, /* PVC address (for output only) */
425 TCA_ATM_STATE, /* VC state (ATM_VS_*; for output only) */
429 #define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
431 /* Network emulator */
437 TCA_NETEM_DELAY_DIST,
443 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
447 __u32 latency; /* added delay (us) */
448 __u32 limit; /* fifo limit (packets) */
449 __u32 loss; /* random packet loss (0=none ~0=100%) */
450 __u32 gap; /* re-ordering gap (0 for none) */
451 __u32 duplicate; /* random packet dup (0=none ~0=100%) */
452 __u32 jitter; /* random jitter in latency (us) */
457 __u32 delay_corr; /* delay correlation */
458 __u32 loss_corr; /* packet loss correlation */
459 __u32 dup_corr; /* duplicate correlation */
462 struct tc_netem_reorder
468 struct tc_netem_corrupt
474 #define NETEM_DIST_SCALE 8192