include/linux/pkt_sched.h

   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 };
  42
  43 struct tc_estimator
  44 {
  45         signed char     interval;
  46         unsigned char   ewma_log;
  47 };
  48
  49 /* "Handles"
  50    ---------
  51
  52     All the traffic control objects have 32bit identifiers, or "handles".
  53
  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.
  58
  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.
  62
  63     Macros to manipulate handles:
  64  */
  65
  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))
  71
  72 #define TC_H_UNSPEC     (0U)
  73 #define TC_H_ROOT       (0xFFFFFFFFU)
  74 #define TC_H_INGRESS    (0xFFFFFFF1U)
  75
  76 struct tc_ratespec
  77 {
  78         unsigned char   cell_log;
  79         unsigned char   __reserved;
  80         unsigned short  overhead;
  81         short           cell_align;
  82         unsigned short  mpu;
  83         __u32           rate;
  84 };
  85
  86 #define TC_RTAB_SIZE    1024
  87
  88 /* FIFO section */
  89
  90 struct tc_fifo_qopt
  91 {
  92         __u32   limit;  /* Queue length: bytes for bfifo, packets for pfifo */
  93 };
  94
  95 /* PRIO section */
  96
  97 #define TCQ_PRIO_BANDS  16
  98 #define TCQ_MIN_PRIO_BANDS 2
  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 enum
 107 {
 108         TCA_PRIO_UNSPEC,
 109         TCA_PRIO_MQ,
 110         __TCA_PRIO_MAX
 111 };
 112
 113 #define TCA_PRIO_MAX    (__TCA_PRIO_MAX - 1)
 114
 115 /* TBF section */
 116
 117 struct tc_tbf_qopt
 118 {
 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_TBF_UNSPEC,
 129         TCA_TBF_PARMS,
 130         TCA_TBF_RTAB,
 131         TCA_TBF_PTAB,
 132         __TCA_TBF_MAX,
 133 };
 134
 135 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
 136
 137
 138 /* TEQL section */
 139
 140 /* TEQL does not require any parameters */
 141
 142 /* SFQ section */
 143
 144 struct tc_sfq_qopt
 145 {
 146         unsigned        quantum;        /* Bytes per round allocated to flow */
 147         int             perturb_period; /* Period of hash perturbation */
 148         __u32           limit;          /* Maximal packets in queue */
 149         unsigned        divisor;        /* Hash divisor  */
 150         unsigned        flows;          /* Maximal number of flows  */
 151 };
 152
 153 struct tc_sfq_xstats
 154 {
 155         __s32           allot;
 156 };
 157
 158 /*
 159  *  NOTE: limit, divisor and flows are hardwired to code at the moment.
 160  *
 161  *      limit=flows=128, divisor=1024;
 162  *
 163  *      The only reason for this is efficiency, it is possible
 164  *      to change these parameters in compile time.
 165  */
 166
 167 /* RED section */
 168
 169 enum
 170 {
 171         TCA_RED_UNSPEC,
 172         TCA_RED_PARMS,
 173         TCA_RED_STAB,
 174         __TCA_RED_MAX,
 175 };
 176
 177 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
 178
 179 struct tc_red_qopt
 180 {
 181         __u32           limit;          /* HARD maximal queue length (bytes)    */
 182         __u32           qth_min;        /* Min average length threshold (bytes) */
 183         __u32           qth_max;        /* Max average length threshold (bytes) */
 184         unsigned char   Wlog;           /* log(W)               */
 185         unsigned char   Plog;           /* log(P_max/(qth_max-qth_min)) */
 186         unsigned char   Scell_log;      /* cell size for idle damping */
 187         unsigned char   flags;
 188 #define TC_RED_ECN      1
 189 #define TC_RED_HARDDROP 2
 190 };
 191
 192 struct tc_red_xstats
 193 {
 194         __u32           early;          /* Early drops */
 195         __u32           pdrop;          /* Drops due to queue limits */
 196         __u32           other;          /* Drops due to drop() calls */
 197         __u32           marked;         /* Marked packets */
 198 };
 199
 200 /* GRED section */
 201
 202 #define MAX_DPs 16
 203
 204 enum
 205 {
 206        TCA_GRED_UNSPEC,
 207        TCA_GRED_PARMS,
 208        TCA_GRED_STAB,
 209        TCA_GRED_DPS,
 210            __TCA_GRED_MAX,
 211 };
 212
 213 #define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
 214
 215 struct tc_gred_qopt
 216 {
 217         __u32           limit;        /* HARD maximal queue length (bytes)    */
 218         __u32           qth_min;      /* Min average length threshold (bytes) */
 219         __u32           qth_max;      /* Max average length threshold (bytes) */
 220         __u32           DP;           /* upto 2^32 DPs */
 221         __u32           backlog;
 222         __u32           qave;
 223         __u32           forced;
 224         __u32           early;
 225         __u32           other;
 226         __u32           pdrop;
 227         __u8            Wlog;         /* log(W)               */
 228         __u8            Plog;         /* log(P_max/(qth_max-qth_min)) */
 229         __u8            Scell_log;    /* cell size for idle damping */
 230         __u8            prio;         /* prio of this VQ */
 231         __u32           packets;
 232         __u32           bytesin;
 233 };
 234
 235 /* gred setup */
 236 struct tc_gred_sopt
 237 {
 238         __u32           DPs;
 239         __u32           def_DP;
 240         __u8            grio;
 241         __u8            flags;
 242         __u16           pad1;
 243 };
 244
 245 /* HTB section */
 246 #define TC_HTB_NUMPRIO          8
 247 #define TC_HTB_MAXDEPTH         8
 248 #define TC_HTB_PROTOVER         3 /* the same as HTB and TC's major */
 249
 250 struct tc_htb_opt
 251 {
 252         struct tc_ratespec      rate;
 253         struct tc_ratespec      ceil;
 254         __u32   buffer;
 255         __u32   cbuffer;
 256         __u32   quantum;
 257         __u32   level;          /* out only */
 258         __u32   prio;
 259 };
 260 struct tc_htb_glob
 261 {
 262         __u32 version;          /* to match HTB/TC */
 263         __u32 rate2quantum;     /* bps->quantum divisor */
 264         __u32 defcls;           /* default class number */
 265         __u32 debug;            /* debug flags */
 266
 267         /* stats */
 268         __u32 direct_pkts; /* count of non shapped packets */
 269 };
 270 enum
 271 {
 272         TCA_HTB_UNSPEC,
 273         TCA_HTB_PARMS,
 274         TCA_HTB_INIT,
 275         TCA_HTB_CTAB,
 276         TCA_HTB_RTAB,
 277         __TCA_HTB_MAX,
 278 };
 279
 280 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
 281
 282 struct tc_htb_xstats
 283 {
 284         __u32 lends;
 285         __u32 borrows;
 286         __u32 giants;   /* too big packets (rate will not be accurate) */
 287         __u32 tokens;
 288         __u32 ctokens;
 289 };
 290
 291 /* HFSC section */
 292
 293 struct tc_hfsc_qopt
 294 {
 295         __u16   defcls;         /* default class */
 296 };
 297
 298 struct tc_service_curve
 299 {
 300         __u32   m1;             /* slope of the first segment in bps */
 301         __u32   d;              /* x-projection of the first segment in us */
 302         __u32   m2;             /* slope of the second segment in bps */
 303 };
 304
 305 struct tc_hfsc_stats
 306 {
 307         __u64   work;           /* total work done */
 308         __u64   rtwork;         /* work done by real-time criteria */
 309         __u32   period;         /* current period */
 310         __u32   level;          /* class level in hierarchy */
 311 };
 312
 313 enum
 314 {
 315         TCA_HFSC_UNSPEC,
 316         TCA_HFSC_RSC,
 317         TCA_HFSC_FSC,
 318         TCA_HFSC_USC,
 319         __TCA_HFSC_MAX,
 320 };
 321
 322 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
 323
 324
 325 /* CBQ section */
 326
 327 #define TC_CBQ_MAXPRIO          8
 328 #define TC_CBQ_MAXLEVEL         8
 329 #define TC_CBQ_DEF_EWMA         5
 330
 331 struct tc_cbq_lssopt
 332 {
 333         unsigned char   change;
 334         unsigned char   flags;
 335 #define TCF_CBQ_LSS_BOUNDED     1
 336 #define TCF_CBQ_LSS_ISOLATED    2
 337         unsigned char   ewma_log;
 338         unsigned char   level;
 339 #define TCF_CBQ_LSS_FLAGS       1
 340 #define TCF_CBQ_LSS_EWMA        2
 341 #define TCF_CBQ_LSS_MAXIDLE     4
 342 #define TCF_CBQ_LSS_MINIDLE     8
 343 #define TCF_CBQ_LSS_OFFTIME     0x10
 344 #define TCF_CBQ_LSS_AVPKT       0x20
 345         __u32           maxidle;
 346         __u32           minidle;
 347         __u32           offtime;
 348         __u32           avpkt;
 349 };
 350
 351 struct tc_cbq_wrropt
 352 {
 353         unsigned char   flags;
 354         unsigned char   priority;
 355         unsigned char   cpriority;
 356         unsigned char   __reserved;
 357         __u32           allot;
 358         __u32           weight;
 359 };
 360
 361 struct tc_cbq_ovl
 362 {
 363         unsigned char   strategy;
 364 #define TC_CBQ_OVL_CLASSIC      0
 365 #define TC_CBQ_OVL_DELAY        1
 366 #define TC_CBQ_OVL_LOWPRIO      2
 367 #define TC_CBQ_OVL_DROP         3
 368 #define TC_CBQ_OVL_RCLASSIC     4
 369         unsigned char   priority2;
 370         __u16           pad;
 371         __u32           penalty;
 372 };
 373
 374 struct tc_cbq_police
 375 {
 376         unsigned char   police;
 377         unsigned char   __res1;
 378         unsigned short  __res2;
 379 };
 380
 381 struct tc_cbq_fopt
 382 {
 383         __u32           split;
 384         __u32           defmap;
 385         __u32           defchange;
 386 };
 387
 388 struct tc_cbq_xstats
 389 {
 390         __u32           borrows;
 391         __u32           overactions;
 392         __s32           avgidle;
 393         __s32           undertime;
 394 };
 395
 396 enum
 397 {
 398         TCA_CBQ_UNSPEC,
 399         TCA_CBQ_LSSOPT,
 400         TCA_CBQ_WRROPT,
 401         TCA_CBQ_FOPT,
 402         TCA_CBQ_OVL_STRATEGY,
 403         TCA_CBQ_RATE,
 404         TCA_CBQ_RTAB,
 405         TCA_CBQ_POLICE,
 406         __TCA_CBQ_MAX,
 407 };
 408
 409 #define TCA_CBQ_MAX     (__TCA_CBQ_MAX - 1)
 410
 411 /* dsmark section */
 412
 413 enum {
 414         TCA_DSMARK_UNSPEC,
 415         TCA_DSMARK_INDICES,
 416         TCA_DSMARK_DEFAULT_INDEX,
 417         TCA_DSMARK_SET_TC_INDEX,
 418         TCA_DSMARK_MASK,
 419         TCA_DSMARK_VALUE,
 420         __TCA_DSMARK_MAX,
 421 };
 422
 423 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
 424
 425 /* ATM  section */
 426
 427 enum {
 428         TCA_ATM_UNSPEC,
 429         TCA_ATM_FD,             /* file/socket descriptor */
 430         TCA_ATM_PTR,            /* pointer to descriptor - later */
 431         TCA_ATM_HDR,            /* LL header */
 432         TCA_ATM_EXCESS,         /* excess traffic class (0 for CLP)  */
 433         TCA_ATM_ADDR,           /* PVC address (for output only) */
 434         TCA_ATM_STATE,          /* VC state (ATM_VS_*; for output only) */
 435         __TCA_ATM_MAX,
 436 };
 437
 438 #define TCA_ATM_MAX     (__TCA_ATM_MAX - 1)
 439
 440 /* Network emulator */
 441
 442 enum
 443 {
 444         TCA_NETEM_UNSPEC,
 445         TCA_NETEM_CORR,
 446         TCA_NETEM_DELAY_DIST,
 447         TCA_NETEM_REORDER,
 448         TCA_NETEM_CORRUPT,
 449         __TCA_NETEM_MAX,
 450 };
 451
 452 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
 453
 454 struct tc_netem_qopt
 455 {
 456         __u32   latency;        /* added delay (us) */
 457         __u32   limit;          /* fifo limit (packets) */
 458         __u32   loss;           /* random packet loss (0=none ~0=100%) */
 459         __u32   gap;            /* re-ordering gap (0 for none) */
 460         __u32   duplicate;      /* random packet dup  (0=none ~0=100%) */
 461         __u32   jitter;         /* random jitter in latency (us) */
 462 };
 463
 464 struct tc_netem_corr
 465 {
 466         __u32   delay_corr;     /* delay correlation */
 467         __u32   loss_corr;      /* packet loss correlation */
 468         __u32   dup_corr;       /* duplicate correlation  */
 469 };
 470
 471 struct tc_netem_reorder
 472 {
 473         __u32   probability;
 474         __u32   correlation;
 475 };
 476
 477 struct tc_netem_corrupt
 478 {
 479         __u32   probability;
 480         __u32   correlation;
 481 };
 482
 483 #define NETEM_DIST_SCALE        8192
 484
 485 #endif