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1/* $NetBSD: altq_hfsc.h,v 1.8 2006/10/12 19:59:08 peter Exp $ */
2/* $KAME: altq_hfsc.h,v 1.12 2003/12/05 05:40:46 kjc Exp $ */
3
4/*
5 * Copyright (c) 1997-1999 Carnegie Mellon University. All Rights Reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and
8 * its documentation is hereby granted (including for commercial or
9 * for-profit use), provided that both the copyright notice and this
10 * permission notice appear in all copies of the software, derivative
11 * works, or modified versions, and any portions thereof.
12 *
13 * THIS SOFTWARE IS EXPERIMENTAL AND IS KNOWN TO HAVE BUGS, SOME OF
14 * WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON PROVIDES THIS
15 * SOFTWARE IN ITS ``AS IS'' CONDITION, AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
25 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
26 * DAMAGE.
27 *
28 * Carnegie Mellon encourages (but does not require) users of this
29 * software to return any improvements or extensions that they make,
30 * and to grant Carnegie Mellon the rights to redistribute these
31 * changes without encumbrance.
32 */
33#ifndef _ALTQ_ALTQ_HFSC_H_
34#define _ALTQ_ALTQ_HFSC_H_
35
36#include <altq/altq.h>
37#include <altq/altq_classq.h>
38#include <altq/altq_red.h>
39#include <altq/altq_rio.h>
40
41#ifdef __cplusplus
42extern "C" {
43#endif
44
45struct service_curve {
46 u_int m1; /* slope of the first segment in bits/sec */
47 u_int d; /* the x-projection of the first segment in msec */
48 u_int m2; /* slope of the second segment in bits/sec */
49};
50
51/* special class handles */
52#define HFSC_NULLCLASS_HANDLE 0
53#define HFSC_MAX_CLASSES 64
54
55/* hfsc class flags */
56#define HFCF_RED 0x0001 /* use RED */
57#define HFCF_ECN 0x0002 /* use RED/ECN */
58#define HFCF_RIO 0x0004 /* use RIO */
59#define HFCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */
60#define HFCF_DEFAULTCLASS 0x1000 /* default class */
61
62/* service curve types */
63#define HFSC_REALTIMESC 1
64#define HFSC_LINKSHARINGSC 2
65#define HFSC_UPPERLIMITSC 4
66#define HFSC_DEFAULTSC (HFSC_REALTIMESC|HFSC_LINKSHARINGSC)
67
68struct hfsc_classstats {
69 u_int class_id;
70 u_int32_t class_handle;
71 struct service_curve rsc;
72 struct service_curve fsc;
73 struct service_curve usc; /* upper limit service curve */
74
75 u_int64_t total; /* total work in bytes */
76 u_int64_t cumul; /* cumulative work in bytes
77 done by real-time criteria */
78 u_int64_t d; /* deadline */
79 u_int64_t e; /* eligible time */
80 u_int64_t vt; /* virtual time */
81 u_int64_t f; /* fit time for upper-limit */
82
83 /* info helpful for debugging */
84 u_int64_t initvt; /* init virtual time */
85 u_int64_t vtoff; /* cl_vt_ipoff */
86 u_int64_t cvtmax; /* cl_maxvt */
87 u_int64_t myf; /* cl_myf */
88 u_int64_t cfmin; /* cl_mincf */
89 u_int64_t cvtmin; /* cl_mincvt */
90 u_int64_t myfadj; /* cl_myfadj */
91 u_int64_t vtadj; /* cl_vtadj */
92 u_int64_t cur_time;
93 u_int32_t machclk_freq;
94
95 u_int qlength;
96 u_int qlimit;
97 struct pktcntr xmit_cnt;
98 struct pktcntr drop_cnt;
99 u_int period;
100
101 u_int vtperiod; /* vt period sequence no */
102 u_int parentperiod; /* parent's vt period seqno */
103 int nactive; /* number of active children */
104
105 /* red and rio related info */
106 int qtype;
107 struct redstats red[3];
108};
109
110#ifdef ALTQ3_COMPAT
111struct hfsc_interface {
112 char hfsc_ifname[IFNAMSIZ]; /* interface name (e.g., fxp0) */
113};
114
115struct hfsc_attach {
116 struct hfsc_interface iface;
117 u_int bandwidth; /* link bandwidth in bits/sec */
118};
119
120struct hfsc_add_class {
121 struct hfsc_interface iface;
122 u_int32_t parent_handle;
123 struct service_curve service_curve;
124 int qlimit;
125 int flags;
126
127 u_int32_t class_handle; /* return value */
128};
129
130struct hfsc_delete_class {
131 struct hfsc_interface iface;
132 u_int32_t class_handle;
133};
134
135struct hfsc_modify_class {
136 struct hfsc_interface iface;
137 u_int32_t class_handle;
138 struct service_curve service_curve;
139 int sctype;
140};
141
142struct hfsc_add_filter {
143 struct hfsc_interface iface;
144 u_int32_t class_handle;
145 struct flow_filter filter;
146
147 u_long filter_handle; /* return value */
148};
149
150struct hfsc_delete_filter {
151 struct hfsc_interface iface;
152 u_long filter_handle;
153};
154
155struct hfsc_class_stats {
156 struct hfsc_interface iface;
157 int nskip; /* skip # of classes */
158 int nclasses; /* # of class stats (WR) */
159 u_int64_t cur_time; /* current time */
160 u_int32_t machclk_freq; /* machine clock frequency */
161 u_int hif_classes; /* # of classes in the tree */
162 u_int hif_packets; /* # of packets in the tree */
163 struct hfsc_classstats *stats; /* pointer to stats array */
164};
165
166#define HFSC_IF_ATTACH _IOW('Q', 1, struct hfsc_attach)
167#define HFSC_IF_DETACH _IOW('Q', 2, struct hfsc_interface)
168#define HFSC_ENABLE _IOW('Q', 3, struct hfsc_interface)
169#define HFSC_DISABLE _IOW('Q', 4, struct hfsc_interface)
170#define HFSC_CLEAR_HIERARCHY _IOW('Q', 5, struct hfsc_interface)
171#define HFSC_ADD_CLASS _IOWR('Q', 7, struct hfsc_add_class)
172#define HFSC_DEL_CLASS _IOW('Q', 8, struct hfsc_delete_class)
173#define HFSC_MOD_CLASS _IOW('Q', 9, struct hfsc_modify_class)
174#define HFSC_ADD_FILTER _IOWR('Q', 10, struct hfsc_add_filter)
175#define HFSC_DEL_FILTER _IOW('Q', 11, struct hfsc_delete_filter)
176#define HFSC_GETSTATS _IOWR('Q', 12, struct hfsc_class_stats)
177#endif /* ALTQ3_COMPAT */
178
179#ifdef _KERNEL
180/*
181 * kernel internal service curve representation
182 * coordinates are given by 64 bit unsigned integers.
183 * x-axis: unit is clock count. for the intel x86 architecture,
184 * the raw Pentium TSC (Timestamp Counter) value is used.
185 * virtual time is also calculated in this time scale.
186 * y-axis: unit is byte.
187 *
188 * the service curve parameters are converted to the internal
189 * representation.
190 * the slope values are scaled to avoid overflow.
191 * the inverse slope values as well as the y-projection of the 1st
192 * segment are kept in order to to avoid 64-bit divide operations
193 * that are expensive on 32-bit architectures.
194 *
195 * note: Intel Pentium TSC never wraps around in several thousands of years.
196 * x-axis doesn't wrap around for 1089 years with 1GHz clock.
197 * y-axis doesn't wrap around for 4358 years with 1Gbps bandwidth.
198 */
199
200/* kernel internal representation of a service curve */
201struct internal_sc {
202 u_int64_t sm1; /* scaled slope of the 1st segment */
203 u_int64_t ism1; /* scaled inverse-slope of the 1st segment */
204 u_int64_t dx; /* the x-projection of the 1st segment */
205 u_int64_t dy; /* the y-projection of the 1st segment */
206 u_int64_t sm2; /* scaled slope of the 2nd segment */
207 u_int64_t ism2; /* scaled inverse-slope of the 2nd segment */
208};
209
210/* runtime service curve */
211struct runtime_sc {
212 u_int64_t x; /* current starting position on x-axis */
213 u_int64_t y; /* current starting position on x-axis */
214 u_int64_t sm1; /* scaled slope of the 1st segment */
215 u_int64_t ism1; /* scaled inverse-slope of the 1st segment */
216 u_int64_t dx; /* the x-projection of the 1st segment */
217 u_int64_t dy; /* the y-projection of the 1st segment */
218 u_int64_t sm2; /* scaled slope of the 2nd segment */
219 u_int64_t ism2; /* scaled inverse-slope of the 2nd segment */
220};
221
222/* for TAILQ based ellist and actlist implementation */
223struct hfsc_class;
224typedef TAILQ_HEAD(_eligible, hfsc_class) ellist_t;
225typedef TAILQ_ENTRY(hfsc_class) elentry_t;
226typedef TAILQ_HEAD(_active, hfsc_class) actlist_t;
227typedef TAILQ_ENTRY(hfsc_class) actentry_t;
228#define ellist_first(s) TAILQ_FIRST(s)
229#define actlist_first(s) TAILQ_FIRST(s)
230#define actlist_last(s) TAILQ_LAST(s, _active)
231
232struct hfsc_class {
233 u_int cl_id; /* class id (just for debug) */
234 u_int32_t cl_handle; /* class handle */
235 struct hfsc_if *cl_hif; /* back pointer to struct hfsc_if */
236 int cl_flags; /* misc flags */
237
238 struct hfsc_class *cl_parent; /* parent class */
239 struct hfsc_class *cl_siblings; /* sibling classes */
240 struct hfsc_class *cl_children; /* child classes */
241
242 class_queue_t *cl_q; /* class queue structure */
243 struct red *cl_red; /* RED state */
244 struct altq_pktattr *cl_pktattr; /* saved header used by ECN */
245
246 u_int64_t cl_total; /* total work in bytes */
247 u_int64_t cl_cumul; /* cumulative work in bytes
248 done by real-time criteria */
249 u_int64_t cl_d; /* deadline */
250 u_int64_t cl_e; /* eligible time */
251 u_int64_t cl_vt; /* virtual time */
252 u_int64_t cl_f; /* time when this class will fit for
253 link-sharing, max(myf, cfmin) */
254 u_int64_t cl_myf; /* my fit-time (as calculated from this
255 class's own upperlimit curve) */
256 u_int64_t cl_myfadj; /* my fit-time adjustment
257 (to cancel history dependence) */
258 u_int64_t cl_cfmin; /* earliest children's fit-time (used
259 with cl_myf to obtain cl_f) */
260 u_int64_t cl_cvtmin; /* minimal virtual time among the
261 children fit for link-sharing
262 (monotonic within a period) */
263 u_int64_t cl_vtadj; /* intra-period cumulative vt
264 adjustment */
265 u_int64_t cl_vtoff; /* inter-period cumulative vt offset */
266 u_int64_t cl_cvtmax; /* max child's vt in the last period */
267
268 u_int64_t cl_initvt; /* init virtual time (for debugging) */
269
270 struct internal_sc *cl_rsc; /* internal real-time service curve */
271 struct internal_sc *cl_fsc; /* internal fair service curve */
272 struct internal_sc *cl_usc; /* internal upperlimit service curve */
273 struct runtime_sc cl_deadline; /* deadline curve */
274 struct runtime_sc cl_eligible; /* eligible curve */
275 struct runtime_sc cl_virtual; /* virtual curve */
276 struct runtime_sc cl_ulimit; /* upperlimit curve */
277
278 u_int cl_vtperiod; /* vt period sequence no */
279 u_int cl_parentperiod; /* parent's vt period seqno */
280 int cl_nactive; /* number of active children */
281 actlist_t *cl_actc; /* active children list */
282
283 actentry_t cl_actlist; /* active children list entry */
284 elentry_t cl_ellist; /* eligible list entry */
285
286 struct {
287 struct pktcntr xmit_cnt;
288 struct pktcntr drop_cnt;
289 u_int period;
290 } cl_stats;
291};
292
293/*
294 * hfsc interface state
295 */
296struct hfsc_if {
297 struct hfsc_if *hif_next; /* interface state list */
298 struct ifaltq *hif_ifq; /* backpointer to ifaltq */
299 struct hfsc_class *hif_rootclass; /* root class */
300 struct hfsc_class *hif_defaultclass; /* default class */
301 struct hfsc_class *hif_class_tbl[HFSC_MAX_CLASSES];
302 struct hfsc_class *hif_pollcache; /* cache for poll operation */
303
304 u_int hif_classes; /* # of classes in the tree */
305 u_int hif_packets; /* # of packets in the tree */
306 u_int hif_classid; /* class id sequence number */
307
308 ellist_t *hif_eligible; /* eligible list */
309
310#ifdef ALTQ3_CLFIER_COMPAT
311 struct acc_classifier hif_classifier;
312#endif
313};
314
315#endif /* _KERNEL */
316
317#ifdef __cplusplus
318}
319#endif
320
321#endif /* _ALTQ_ALTQ_HFSC_H_ */