1 /*- 2 * Copyright (c) 1997-1999 Carnegie Mellon University. All Rights Reserved. 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation is hereby granted (including for commercial or 6 * for-profit use), provided that both the copyright notice and this 7 * permission notice appear in all copies of the software, derivative 8 * works, or modified versions, and any portions thereof. 9 * 10 * THIS SOFTWARE IS EXPERIMENTAL AND IS KNOWN TO HAVE BUGS, SOME OF 11 * WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON PROVIDES THIS 12 * SOFTWARE IN ITS ``AS IS'' CONDITION, AND ANY EXPRESS OR IMPLIED 13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 14 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 15 * DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 16 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 17 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 18 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 19 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 20 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 22 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 23 * DAMAGE. 24 * 25 * Carnegie Mellon encourages (but does not require) users of this 26 * software to return any improvements or extensions that they make, 27 * and to grant Carnegie Mellon the rights to redistribute these 28 * changes without encumbrance. 29 * 30 * $KAME: altq_hfsc.h,v 1.12 2003/12/05 05:40:46 kjc Exp $ 31 * $FreeBSD$ 32 */ 33 #ifndef _ALTQ_ALTQ_HFSC_H_ 34 #define _ALTQ_ALTQ_HFSC_H_ 35 36 #include <net/altq/altq.h> 37 #include <net/altq/altq_classq.h> 38 #include <net/altq/altq_codel.h> 39 #include <net/altq/altq_red.h> 40 #include <net/altq/altq_rio.h> 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 struct service_curve { 47 u_int m1; /* slope of the first segment in bits/sec */ 48 u_int d; /* the x-projection of the first segment in msec */ 49 u_int m2; /* slope of the second segment in bits/sec */ 50 }; 51 52 /* special class handles */ 53 #define HFSC_NULLCLASS_HANDLE 0 54 #define HFSC_MAX_CLASSES 64 55 56 /* hfsc class flags */ 57 #define HFCF_RED 0x0001 /* use RED */ 58 #define HFCF_ECN 0x0002 /* use RED/ECN */ 59 #define HFCF_RIO 0x0004 /* use RIO */ 60 #define HFCF_CODEL 0x0008 /* use CoDel */ 61 #define HFCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */ 62 #define HFCF_DEFAULTCLASS 0x1000 /* default class */ 63 64 /* service curve types */ 65 #define HFSC_REALTIMESC 1 66 #define HFSC_LINKSHARINGSC 2 67 #define HFSC_UPPERLIMITSC 4 68 #define HFSC_DEFAULTSC (HFSC_REALTIMESC|HFSC_LINKSHARINGSC) 69 70 struct hfsc_classstats { 71 u_int class_id; 72 u_int32_t class_handle; 73 struct service_curve rsc; 74 struct service_curve fsc; 75 struct service_curve usc; /* upper limit service curve */ 76 77 u_int64_t total; /* total work in bytes */ 78 u_int64_t cumul; /* cumulative work in bytes 79 done by real-time criteria */ 80 u_int64_t d; /* deadline */ 81 u_int64_t e; /* eligible time */ 82 u_int64_t vt; /* virtual time */ 83 u_int64_t f; /* fit time for upper-limit */ 84 85 /* info helpful for debugging */ 86 u_int64_t initvt; /* init virtual time */ 87 u_int64_t vtoff; /* cl_vt_ipoff */ 88 u_int64_t cvtmax; /* cl_maxvt */ 89 u_int64_t myf; /* cl_myf */ 90 u_int64_t cfmin; /* cl_mincf */ 91 u_int64_t cvtmin; /* cl_mincvt */ 92 u_int64_t myfadj; /* cl_myfadj */ 93 u_int64_t vtadj; /* cl_vtadj */ 94 u_int64_t cur_time; 95 u_int32_t machclk_freq; 96 97 u_int qlength; 98 u_int qlimit; 99 struct pktcntr xmit_cnt; 100 struct pktcntr drop_cnt; 101 u_int period; 102 103 u_int vtperiod; /* vt period sequence no */ 104 u_int parentperiod; /* parent's vt period seqno */ 105 int nactive; /* number of active children */ 106 107 /* codel, red and rio related info */ 108 int qtype; 109 struct redstats red[3]; 110 struct codel_stats codel; 111 }; 112 113 #ifdef ALTQ3_COMPAT 114 struct hfsc_interface { 115 char hfsc_ifname[IFNAMSIZ]; /* interface name (e.g., fxp0) */ 116 }; 117 118 struct hfsc_attach { 119 struct hfsc_interface iface; 120 u_int bandwidth; /* link bandwidth in bits/sec */ 121 }; 122 123 struct hfsc_add_class { 124 struct hfsc_interface iface; 125 u_int32_t parent_handle; 126 struct service_curve service_curve; 127 int qlimit; 128 int flags; 129 130 u_int32_t class_handle; /* return value */ 131 }; 132 133 struct hfsc_delete_class { 134 struct hfsc_interface iface; 135 u_int32_t class_handle; 136 }; 137 138 struct hfsc_modify_class { 139 struct hfsc_interface iface; 140 u_int32_t class_handle; 141 struct service_curve service_curve; 142 int sctype; 143 }; 144 145 struct hfsc_add_filter { 146 struct hfsc_interface iface; 147 u_int32_t class_handle; 148 struct flow_filter filter; 149 150 u_long filter_handle; /* return value */ 151 }; 152 153 struct hfsc_delete_filter { 154 struct hfsc_interface iface; 155 u_long filter_handle; 156 }; 157 158 struct hfsc_class_stats { 159 struct hfsc_interface iface; 160 int nskip; /* skip # of classes */ 161 int nclasses; /* # of class stats (WR) */ 162 u_int64_t cur_time; /* current time */ 163 u_int32_t machclk_freq; /* machine clock frequency */ 164 u_int hif_classes; /* # of classes in the tree */ 165 u_int hif_packets; /* # of packets in the tree */ 166 struct hfsc_classstats *stats; /* pointer to stats array */ 167 }; 168 169 #define HFSC_IF_ATTACH _IOW('Q', 1, struct hfsc_attach) 170 #define HFSC_IF_DETACH _IOW('Q', 2, struct hfsc_interface) 171 #define HFSC_ENABLE _IOW('Q', 3, struct hfsc_interface) 172 #define HFSC_DISABLE _IOW('Q', 4, struct hfsc_interface) 173 #define HFSC_CLEAR_HIERARCHY _IOW('Q', 5, struct hfsc_interface) 174 #define HFSC_ADD_CLASS _IOWR('Q', 7, struct hfsc_add_class) 175 #define HFSC_DEL_CLASS _IOW('Q', 8, struct hfsc_delete_class) 176 #define HFSC_MOD_CLASS _IOW('Q', 9, struct hfsc_modify_class) 177 #define HFSC_ADD_FILTER _IOWR('Q', 10, struct hfsc_add_filter) 178 #define HFSC_DEL_FILTER _IOW('Q', 11, struct hfsc_delete_filter) 179 #define HFSC_GETSTATS _IOWR('Q', 12, struct hfsc_class_stats) 180 #endif /* ALTQ3_COMPAT */ 181 182 #ifdef _KERNEL 183 /* 184 * kernel internal service curve representation 185 * coordinates are given by 64 bit unsigned integers. 186 * x-axis: unit is clock count. for the intel x86 architecture, 187 * the raw Pentium TSC (Timestamp Counter) value is used. 188 * virtual time is also calculated in this time scale. 189 * y-axis: unit is byte. 190 * 191 * the service curve parameters are converted to the internal 192 * representation. 193 * the slope values are scaled to avoid overflow. 194 * the inverse slope values as well as the y-projection of the 1st 195 * segment are kept in order to to avoid 64-bit divide operations 196 * that are expensive on 32-bit architectures. 197 * 198 * note: Intel Pentium TSC never wraps around in several thousands of years. 199 * x-axis doesn't wrap around for 1089 years with 1GHz clock. 200 * y-axis doesn't wrap around for 4358 years with 1Gbps bandwidth. 201 */ 202 203 /* kernel internal representation of a service curve */ 204 struct internal_sc { 205 u_int64_t sm1; /* scaled slope of the 1st segment */ 206 u_int64_t ism1; /* scaled inverse-slope of the 1st segment */ 207 u_int64_t dx; /* the x-projection of the 1st segment */ 208 u_int64_t dy; /* the y-projection of the 1st segment */ 209 u_int64_t sm2; /* scaled slope of the 2nd segment */ 210 u_int64_t ism2; /* scaled inverse-slope of the 2nd segment */ 211 }; 212 213 /* runtime service curve */ 214 struct runtime_sc { 215 u_int64_t x; /* current starting position on x-axis */ 216 u_int64_t y; /* current starting position on x-axis */ 217 u_int64_t sm1; /* scaled slope of the 1st segment */ 218 u_int64_t ism1; /* scaled inverse-slope of the 1st segment */ 219 u_int64_t dx; /* the x-projection of the 1st segment */ 220 u_int64_t dy; /* the y-projection of the 1st segment */ 221 u_int64_t sm2; /* scaled slope of the 2nd segment */ 222 u_int64_t ism2; /* scaled inverse-slope of the 2nd segment */ 223 }; 224 225 struct hfsc_class { 226 u_int cl_id; /* class id (just for debug) */ 227 u_int32_t cl_handle; /* class handle */ 228 struct hfsc_if *cl_hif; /* back pointer to struct hfsc_if */ 229 int cl_flags; /* misc flags */ 230 231 struct hfsc_class *cl_parent; /* parent class */ 232 struct hfsc_class *cl_siblings; /* sibling classes */ 233 struct hfsc_class *cl_children; /* child classes */ 234 235 class_queue_t *cl_q; /* class queue structure */ 236 union { 237 struct red *cl_red; /* RED state */ 238 struct codel *cl_codel; /* CoDel state */ 239 } cl_aqm; 240 #define cl_red cl_aqm.cl_red 241 #define cl_codel cl_aqm.cl_codel 242 struct altq_pktattr *cl_pktattr; /* saved header used by ECN */ 243 244 u_int64_t cl_total; /* total work in bytes */ 245 u_int64_t cl_cumul; /* cumulative work in bytes 246 done by real-time criteria */ 247 u_int64_t cl_d; /* deadline */ 248 u_int64_t cl_e; /* eligible time */ 249 u_int64_t cl_vt; /* virtual time */ 250 u_int64_t cl_f; /* time when this class will fit for 251 link-sharing, max(myf, cfmin) */ 252 u_int64_t cl_myf; /* my fit-time (as calculated from this 253 class's own upperlimit curve) */ 254 u_int64_t cl_myfadj; /* my fit-time adjustment 255 (to cancel history dependence) */ 256 u_int64_t cl_cfmin; /* earliest children's fit-time (used 257 with cl_myf to obtain cl_f) */ 258 u_int64_t cl_cvtmin; /* minimal virtual time among the 259 children fit for link-sharing 260 (monotonic within a period) */ 261 u_int64_t cl_vtadj; /* intra-period cumulative vt 262 adjustment */ 263 u_int64_t cl_vtoff; /* inter-period cumulative vt offset */ 264 u_int64_t cl_cvtmax; /* max child's vt in the last period */ 265 266 u_int64_t cl_initvt; /* init virtual time (for debugging) */ 267 268 struct internal_sc *cl_rsc; /* internal real-time service curve */ 269 struct internal_sc *cl_fsc; /* internal fair service curve */ 270 struct internal_sc *cl_usc; /* internal upperlimit service curve */ 271 struct runtime_sc cl_deadline; /* deadline curve */ 272 struct runtime_sc cl_eligible; /* eligible curve */ 273 struct runtime_sc cl_virtual; /* virtual curve */ 274 struct runtime_sc cl_ulimit; /* upperlimit curve */ 275 276 u_int cl_vtperiod; /* vt period sequence no */ 277 u_int cl_parentperiod; /* parent's vt period seqno */ 278 int cl_nactive; /* number of active children */ 279 280 TAILQ_HEAD(acthead, hfsc_class) cl_actc; /* active children list */ 281 TAILQ_ENTRY(hfsc_class) cl_actlist; /* active children list entry */ 282 TAILQ_ENTRY(hfsc_class) cl_ellist; /* eligible list entry */ 283 284 struct { 285 struct pktcntr xmit_cnt; 286 struct pktcntr drop_cnt; 287 u_int period; 288 } cl_stats; 289 }; 290 291 /* 292 * hfsc interface state 293 */ 294 struct hfsc_if { 295 struct hfsc_if *hif_next; /* interface state list */ 296 struct ifaltq *hif_ifq; /* backpointer to ifaltq */ 297 struct hfsc_class *hif_rootclass; /* root class */ 298 struct hfsc_class *hif_defaultclass; /* default class */ 299 struct hfsc_class *hif_class_tbl[HFSC_MAX_CLASSES]; 300 struct hfsc_class *hif_pollcache; /* cache for poll operation */ 301 302 u_int hif_classes; /* # of classes in the tree */ 303 u_int hif_packets; /* # of packets in the tree */ 304 u_int hif_classid; /* class id sequence number */ 305 306 TAILQ_HEAD(elighead, hfsc_class) hif_eligible; /* eligible list */ 307 308 #ifdef ALTQ3_CLFIER_COMPAT 309 struct acc_classifier hif_classifier; 310 #endif 311 }; 312 313 #endif /* _KERNEL */ 314 315 #ifdef __cplusplus 316 } 317 #endif 318 319 #endif /* _ALTQ_ALTQ_HFSC_H_ */ 320