1 #ifndef __LINUX_PKT_SCHED_H
2 #define __LINUX_PKT_SCHED_H
3
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.
7
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.
11
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
14 filler or even bulk.
15 */
16
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
23
24 #define TC_PRIO_MAX 15
25
26 /* Generic queue statistics, available for all the elements.
27 Particular schedulers may have also their private records.
28 */
29
30 struct tc_stats
31 {
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 */
39 __u32 qlen;
40 __u32 backlog;
41 #ifdef __KERNEL__
42 spinlock_t *lock;
43 #endif
44 };
45
46 struct tc_estimator
47 {
48 char interval;
49 unsigned char ewma_log;
50 };
51
52 /* "Handles"
53 ---------
54
55 All the traffic control objects have 32bit identifiers, or "handles".
56
57 They can be considered as opaque numbers from user API viewpoint,
58 but actually they always consist of two fields: major and
59 minor numbers, which are interpreted by kernel specially,
60 that may be used by applications, though not recommended.
61
62 F.e. qdisc handles always have minor number equal to zero,
63 classes (or flows) have major equal to parent qdisc major, and
64 minor uniquely identifying class inside qdisc.
65
66 Macros to manipulate handles:
67 */
68
69 #define TC_H_MAJ_MASK (0xFFFF0000U)
70 #define TC_H_MIN_MASK (0x0000FFFFU)
71 #define TC_H_MAJ(h) ((h)&TC_H_MAJ_MASK)
72 #define TC_H_MIN(h) ((h)&TC_H_MIN_MASK)
73 #define TC_H_MAKE(maj,min) (((maj)&TC_H_MAJ_MASK)|((min)&TC_H_MIN_MASK))
74
75 #define TC_H_UNSPEC (0U)
76 #define TC_H_ROOT (0xFFFFFFFFU)
77 #define TC_H_INGRESS (0xFFFFFFF1U)
78
79 struct tc_ratespec
80 {
81 unsigned char cell_log;
82 unsigned char __reserved;
83 unsigned short feature;
84 short addend;
85 unsigned short mpu;
86 __u32 rate;
87 };
88
89 /* FIFO section */
90
91 struct tc_fifo_qopt
92 {
93 __u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
94 };
95
96 /* PRIO section */
97
98 #define TCQ_PRIO_BANDS 16
99
100 struct tc_prio_qopt
101 {
102 int bands; /* Number of bands */
103 __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
104 };
105
106 /* CSZ section */
107
108 struct tc_csz_qopt
109 {
110 int flows; /* Maximal number of guaranteed flows */
111 unsigned char R_log; /* Fixed point position for round number */
112 unsigned char delta_log; /* Log of maximal managed time interval */
113 __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> CSZ band */
114 };
115
116 struct tc_csz_copt
117 {
118 struct tc_ratespec slice;
119 struct tc_ratespec rate;
120 struct tc_ratespec peakrate;
121 __u32 limit;
122 __u32 buffer;
123 __u32 mtu;
124 };
125
126 enum
127 {
128 TCA_CSZ_UNSPEC,
129 TCA_CSZ_PARMS,
130 TCA_CSZ_RTAB,
131 TCA_CSZ_PTAB,
132 };
133
134 /* TBF section */
135
136 struct tc_tbf_qopt
137 {
138 struct tc_ratespec rate;
139 struct tc_ratespec peakrate;
140 __u32 limit;
141 __u32 buffer;
142 __u32 mtu;
143 };
144
145 enum
146 {
147 TCA_TBF_UNSPEC,
148 TCA_TBF_PARMS,
149 TCA_TBF_RTAB,
150 TCA_TBF_PTAB,
151 };
152
153
154 /* TEQL section */
155
156 /* TEQL does not require any parameters */
157
158 /* SFQ section */
159
160 struct tc_sfq_qopt
161 {
162 unsigned quantum; /* Bytes per round allocated to flow */
163 int perturb_period; /* Period of hash perturbation */
164 __u32 limit; /* Maximal packets in queue */
165 unsigned divisor; /* Hash divisor */
166 unsigned flows; /* Maximal number of flows */
167 };
168
169 /*
170 * NOTE: limit, divisor and flows are hardwired to code at the moment.
171 *
172 * limit=flows=128, divisor=1024;
173 *
174 * The only reason for this is efficiency, it is possible
175 * to change these parameters in compile time.
176 */
177
178 /* RED section */
179
180 enum
181 {
182 TCA_RED_UNSPEC,
183 TCA_RED_PARMS,
184 TCA_RED_STAB,
185 };
186
187 struct tc_red_qopt
188 {
189 __u32 limit; /* HARD maximal queue length (bytes) */
190 __u32 qth_min; /* Min average length threshold (bytes) */
191 __u32 qth_max; /* Max average length threshold (bytes) */
192 unsigned char Wlog; /* log(W) */
193 unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
194 unsigned char Scell_log; /* cell size for idle damping */
195 unsigned char flags;
196 #define TC_RED_ECN 1
197 };
198
199 struct tc_red_xstats
200 {
201 __u32 early; /* Early drops */
202 __u32 pdrop; /* Drops due to queue limits */
203 __u32 other; /* Drops due to drop() calls */
204 __u32 marked; /* Marked packets */
205 };
206
207 /* GRED section */
208
209 #define MAX_DPs 16
210
211 enum
212 {
213 TCA_GRED_UNSPEC,
214 TCA_GRED_PARMS,
215 TCA_GRED_STAB,
216 TCA_GRED_DPS,
217 };
218
219 #define TCA_SET_OFF TCA_GRED_PARMS
220 struct tc_gred_qopt
221 {
222 __u32 limit; /* HARD maximal queue length (bytes)
223 */
224 __u32 qth_min; /* Min average length threshold (bytes)
225 */
226 __u32 qth_max; /* Max average length threshold (bytes)
227 */
228 __u32 DP; /* upto 2^32 DPs */
229 __u32 backlog;
230 __u32 qave;
231 __u32 forced;
232 __u32 early;
233 __u32 other;
234 __u32 pdrop;
235
236 unsigned char Wlog; /* log(W) */
237 unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
238 unsigned char Scell_log; /* cell size for idle damping */
239 __u8 prio; /* prio of this VQ */
240 __u32 packets;
241 __u32 bytesin;
242 };
243 /* gred setup */
244 struct tc_gred_sopt
245 {
246 __u32 DPs;
247 __u32 def_DP;
248 __u8 grio;
249 };
250
251 /* CBQ section */
252
253 #define TC_CBQ_MAXPRIO 8
254 #define TC_CBQ_MAXLEVEL 8
255 #define TC_CBQ_DEF_EWMA 5
256
257 struct tc_cbq_lssopt
258 {
259 unsigned char change;
260 unsigned char flags;
261 #define TCF_CBQ_LSS_BOUNDED 1
262 #define TCF_CBQ_LSS_ISOLATED 2
263 unsigned char ewma_log;
264 unsigned char level;
265 #define TCF_CBQ_LSS_FLAGS 1
266 #define TCF_CBQ_LSS_EWMA 2
267 #define TCF_CBQ_LSS_MAXIDLE 4
268 #define TCF_CBQ_LSS_MINIDLE 8
269 #define TCF_CBQ_LSS_OFFTIME 0x10
270 #define TCF_CBQ_LSS_AVPKT 0x20
271 __u32 maxidle;
272 __u32 minidle;
273 __u32 offtime;
274 __u32 avpkt;
275 };
276
277 struct tc_cbq_wrropt
278 {
279 unsigned char flags;
280 unsigned char priority;
281 unsigned char cpriority;
282 unsigned char __reserved;
283 __u32 allot;
284 __u32 weight;
285 };
286
287 struct tc_cbq_ovl
288 {
289 unsigned char strategy;
290 #define TC_CBQ_OVL_CLASSIC 0
291 #define TC_CBQ_OVL_DELAY 1
292 #define TC_CBQ_OVL_LOWPRIO 2
293 #define TC_CBQ_OVL_DROP 3
294 #define TC_CBQ_OVL_RCLASSIC 4
295 unsigned char priority2;
296 __u32 penalty;
297 };
298
299 struct tc_cbq_police
300 {
301 unsigned char police;
302 unsigned char __res1;
303 unsigned short __res2;
304 };
305
306 struct tc_cbq_fopt
307 {
308 __u32 split;
309 __u32 defmap;
310 __u32 defchange;
311 };
312
313 struct tc_cbq_xstats
314 {
315 __u32 borrows;
316 __u32 overactions;
317 __s32 avgidle;
318 __s32 undertime;
319 };
320
321 enum
322 {
323 TCA_CBQ_UNSPEC,
324 TCA_CBQ_LSSOPT,
325 TCA_CBQ_WRROPT,
326 TCA_CBQ_FOPT,
327 TCA_CBQ_OVL_STRATEGY,
328 TCA_CBQ_RATE,
329 TCA_CBQ_RTAB,
330 TCA_CBQ_POLICE,
331 };
332
333 #define TCA_CBQ_MAX TCA_CBQ_POLICE
334
335 /* dsmark section */
336
337 enum {
338 TCA_DSMARK_UNSPEC,
339 TCA_DSMARK_INDICES,
340 TCA_DSMARK_DEFAULT_INDEX,
341 TCA_DSMARK_SET_TC_INDEX,
342 TCA_DSMARK_MASK,
343 TCA_DSMARK_VALUE
344 };
345
346 #define TCA_DSMARK_MAX TCA_DSMARK_VALUE
347
348 /* ATM section */
349
350 enum {
351 TCA_ATM_UNSPEC,
352 TCA_ATM_FD, /* file/socket descriptor */
353 TCA_ATM_PTR, /* pointer to descriptor - later */
354 TCA_ATM_HDR, /* LL header */
355 TCA_ATM_EXCESS, /* excess traffic class (0 for CLP) */
356 TCA_ATM_ADDR, /* PVC address (for output only) */
357 TCA_ATM_STATE /* VC state (ATM_VS_*; for output only) */
358 };
359
360 #define TCA_ATM_MAX TCA_ATM_STATE
361
362 #endif
363
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.