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 /* FIFO section */
  87
  88 struct tc_fifo_qopt
  89 {
  90         __u32   limit;  /* Queue length: bytes for bfifo, packets for pfifo */
  91 };
  92
  93 /* PRIO section */
  94
  95 #define TCQ_PRIO_BANDS  16
  96 #define TCQ_MIN_PRIO_BANDS 2
  97
  98 struct tc_prio_qopt
  99 {
 100         int     bands;                  /* Number of bands */
 101         __u8    priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
 102 };
 103
 104 enum
 105 {
 106         TCA_PRIO_UNSPEC,
 107         TCA_PRIO_MQ,
 108         __TCA_PRIO_MAX
 109 };
 110
 111 #define TCA_PRIO_MAX    (__TCA_PRIO_MAX - 1)
 112
 113 /* TBF section */
 114
 115 struct tc_tbf_qopt
 116 {
 117         struct tc_ratespec rate;
 118         struct tc_ratespec peakrate;
 119         __u32           limit;
 120         __u32           buffer;
 121         __u32           mtu;
 122 };
 123
 124 enum
 125 {
 126         TCA_TBF_UNSPEC,
 127         TCA_TBF_PARMS,
 128         TCA_TBF_RTAB,
 129         TCA_TBF_PTAB,
 130         __TCA_TBF_MAX,
 131 };
 132
 133 #define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
 134
 135
 136 /* TEQL section */
 137
 138 /* TEQL does not require any parameters */
 139
 140 /* SFQ section */
 141
 142 struct tc_sfq_qopt
 143 {
 144         unsigned        quantum;        /* Bytes per round allocated to flow */
 145         int             perturb_period; /* Period of hash perturbation */
 146         __u32           limit;          /* Maximal packets in queue */
 147         unsigned        divisor;        /* Hash divisor  */
 148         unsigned        flows;          /* Maximal number of flows  */
 149 };
 150
 151 /*
 152  *  NOTE: limit, divisor and flows are hardwired to code at the moment.
 153  *
 154  *      limit=flows=128, divisor=1024;
 155  *
 156  *      The only reason for this is efficiency, it is possible
 157  *      to change these parameters in compile time.
 158  */
 159
 160 /* RED section */
 161
 162 enum
 163 {
 164         TCA_RED_UNSPEC,
 165         TCA_RED_PARMS,
 166         TCA_RED_STAB,
 167         __TCA_RED_MAX,
 168 };
 169
 170 #define TCA_RED_MAX (__TCA_RED_MAX - 1)
 171
 172 struct tc_red_qopt
 173 {
 174         __u32           limit;          /* HARD maximal queue length (bytes)    */
 175         __u32           qth_min;        /* Min average length threshold (bytes) */
 176         __u32           qth_max;        /* Max average length threshold (bytes) */
 177         unsigned char   Wlog;           /* log(W)               */
 178         unsigned char   Plog;           /* log(P_max/(qth_max-qth_min)) */
 179         unsigned char   Scell_log;      /* cell size for idle damping */
 180         unsigned char   flags;
 181 #define TC_RED_ECN      1
 182 #define TC_RED_HARDDROP 2
 183 };
 184
 185 struct tc_red_xstats
 186 {
 187         __u32           early;          /* Early drops */
 188         __u32           pdrop;          /* Drops due to queue limits */
 189         __u32           other;          /* Drops due to drop() calls */
 190         __u32           marked;         /* Marked packets */
 191 };
 192
 193 /* GRED section */
 194
 195 #define MAX_DPs 16
 196
 197 enum
 198 {
 199        TCA_GRED_UNSPEC,
 200        TCA_GRED_PARMS,
 201        TCA_GRED_STAB,
 202        TCA_GRED_DPS,
 203            __TCA_GRED_MAX,
 204 };
 205
 206 #define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
 207
 208 struct tc_gred_qopt
 209 {
 210         __u32           limit;        /* HARD maximal queue length (bytes)    */
 211         __u32           qth_min;      /* Min average length threshold (bytes) */
 212         __u32           qth_max;      /* Max average length threshold (bytes) */
 213         __u32           DP;           /* upto 2^32 DPs */
 214         __u32           backlog;
 215         __u32           qave;
 216         __u32           forced;
 217         __u32           early;
 218         __u32           other;
 219         __u32           pdrop;
 220         __u8            Wlog;         /* log(W)               */
 221         __u8            Plog;         /* log(P_max/(qth_max-qth_min)) */
 222         __u8            Scell_log;    /* cell size for idle damping */
 223         __u8            prio;         /* prio of this VQ */
 224         __u32           packets;
 225         __u32           bytesin;
 226 };
 227
 228 /* gred setup */
 229 struct tc_gred_sopt
 230 {
 231         __u32           DPs;
 232         __u32           def_DP;
 233         __u8            grio;
 234         __u8            flags;
 235         __u16           pad1;
 236 };
 237
 238 /* HTB section */
 239 #define TC_HTB_NUMPRIO          8
 240 #define TC_HTB_MAXDEPTH         8
 241 #define TC_HTB_PROTOVER         3 /* the same as HTB and TC's major */
 242
 243 struct tc_htb_opt
 244 {
 245         struct tc_ratespec      rate;
 246         struct tc_ratespec      ceil;
 247         __u32   buffer;
 248         __u32   cbuffer;
 249         __u32   quantum;
 250         __u32   level;          /* out only */
 251         __u32   prio;
 252 };
 253 struct tc_htb_glob
 254 {
 255         __u32 version;          /* to match HTB/TC */
 256         __u32 rate2quantum;     /* bps->quantum divisor */
 257         __u32 defcls;           /* default class number */
 258         __u32 debug;            /* debug flags */
 259
 260         /* stats */
 261         __u32 direct_pkts; /* count of non shapped packets */
 262 };
 263 enum
 264 {
 265         TCA_HTB_UNSPEC,
 266         TCA_HTB_PARMS,
 267         TCA_HTB_INIT,
 268         TCA_HTB_CTAB,
 269         TCA_HTB_RTAB,
 270         __TCA_HTB_MAX,
 271 };
 272
 273 #define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
 274
 275 struct tc_htb_xstats
 276 {
 277         __u32 lends;
 278         __u32 borrows;
 279         __u32 giants;   /* too big packets (rate will not be accurate) */
 280         __u32 tokens;
 281         __u32 ctokens;
 282 };
 283
 284 /* HFSC section */
 285
 286 struct tc_hfsc_qopt
 287 {
 288         __u16   defcls;         /* default class */
 289 };
 290
 291 struct tc_service_curve
 292 {
 293         __u32   m1;             /* slope of the first segment in bps */
 294         __u32   d;              /* x-projection of the first segment in us */
 295         __u32   m2;             /* slope of the second segment in bps */
 296 };
 297
 298 struct tc_hfsc_stats
 299 {
 300         __u64   work;           /* total work done */
 301         __u64   rtwork;         /* work done by real-time criteria */
 302         __u32   period;         /* current period */
 303         __u32   level;          /* class level in hierarchy */
 304 };
 305
 306 enum
 307 {
 308         TCA_HFSC_UNSPEC,
 309         TCA_HFSC_RSC,
 310         TCA_HFSC_FSC,
 311         TCA_HFSC_USC,
 312         __TCA_HFSC_MAX,
 313 };
 314
 315 #define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
 316
 317
 318 /* CBQ section */
 319
 320 #define TC_CBQ_MAXPRIO          8
 321 #define TC_CBQ_MAXLEVEL         8
 322 #define TC_CBQ_DEF_EWMA         5
 323
 324 struct tc_cbq_lssopt
 325 {
 326         unsigned char   change;
 327         unsigned char   flags;
 328 #define TCF_CBQ_LSS_BOUNDED     1
 329 #define TCF_CBQ_LSS_ISOLATED    2
 330         unsigned char   ewma_log;
 331         unsigned char   level;
 332 #define TCF_CBQ_LSS_FLAGS       1
 333 #define TCF_CBQ_LSS_EWMA        2
 334 #define TCF_CBQ_LSS_MAXIDLE     4
 335 #define TCF_CBQ_LSS_MINIDLE     8
 336 #define TCF_CBQ_LSS_OFFTIME     0x10
 337 #define TCF_CBQ_LSS_AVPKT       0x20
 338         __u32           maxidle;
 339         __u32           minidle;
 340         __u32           offtime;
 341         __u32           avpkt;
 342 };
 343
 344 struct tc_cbq_wrropt
 345 {
 346         unsigned char   flags;
 347         unsigned char   priority;
 348         unsigned char   cpriority;
 349         unsigned char   __reserved;
 350         __u32           allot;
 351         __u32           weight;
 352 };
 353
 354 struct tc_cbq_ovl
 355 {
 356         unsigned char   strategy;
 357 #define TC_CBQ_OVL_CLASSIC      0
 358 #define TC_CBQ_OVL_DELAY        1
 359 #define TC_CBQ_OVL_LOWPRIO      2
 360 #define TC_CBQ_OVL_DROP         3
 361 #define TC_CBQ_OVL_RCLASSIC     4
 362         unsigned char   priority2;
 363         __u16           pad;
 364         __u32           penalty;
 365 };
 366
 367 struct tc_cbq_police
 368 {
 369         unsigned char   police;
 370         unsigned char   __res1;
 371         unsigned short  __res2;
 372 };
 373
 374 struct tc_cbq_fopt
 375 {
 376         __u32           split;
 377         __u32           defmap;
 378         __u32           defchange;
 379 };
 380
 381 struct tc_cbq_xstats
 382 {
 383         __u32           borrows;
 384         __u32           overactions;
 385         __s32           avgidle;
 386         __s32           undertime;
 387 };
 388
 389 enum
 390 {
 391         TCA_CBQ_UNSPEC,
 392         TCA_CBQ_LSSOPT,
 393         TCA_CBQ_WRROPT,
 394         TCA_CBQ_FOPT,
 395         TCA_CBQ_OVL_STRATEGY,
 396         TCA_CBQ_RATE,
 397         TCA_CBQ_RTAB,
 398         TCA_CBQ_POLICE,
 399         __TCA_CBQ_MAX,
 400 };
 401
 402 #define TCA_CBQ_MAX     (__TCA_CBQ_MAX - 1)
 403
 404 /* dsmark section */
 405
 406 enum {
 407         TCA_DSMARK_UNSPEC,
 408         TCA_DSMARK_INDICES,
 409         TCA_DSMARK_DEFAULT_INDEX,
 410         TCA_DSMARK_SET_TC_INDEX,
 411         TCA_DSMARK_MASK,
 412         TCA_DSMARK_VALUE,
 413         __TCA_DSMARK_MAX,
 414 };
 415
 416 #define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
 417
 418 /* ATM  section */
 419
 420 enum {
 421         TCA_ATM_UNSPEC,
 422         TCA_ATM_FD,             /* file/socket descriptor */
 423         TCA_ATM_PTR,            /* pointer to descriptor - later */
 424         TCA_ATM_HDR,            /* LL header */
 425         TCA_ATM_EXCESS,         /* excess traffic class (0 for CLP)  */
 426         TCA_ATM_ADDR,           /* PVC address (for output only) */
 427         TCA_ATM_STATE,          /* VC state (ATM_VS_*; for output only) */
 428         __TCA_ATM_MAX,
 429 };
 430
 431 #define TCA_ATM_MAX     (__TCA_ATM_MAX - 1)
 432
 433 /* Network emulator */
 434
 435 enum
 436 {
 437         TCA_NETEM_UNSPEC,
 438         TCA_NETEM_CORR,
 439         TCA_NETEM_DELAY_DIST,
 440         TCA_NETEM_REORDER,
 441         TCA_NETEM_CORRUPT,
 442         __TCA_NETEM_MAX,
 443 };
 444
 445 #define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
 446
 447 struct tc_netem_qopt
 448 {
 449         __u32   latency;        /* added delay (us) */
 450         __u32   limit;          /* fifo limit (packets) */
 451         __u32   loss;           /* random packet loss (0=none ~0=100%) */
 452         __u32   gap;            /* re-ordering gap (0 for none) */
 453         __u32   duplicate;      /* random packet dup  (0=none ~0=100%) */
 454         __u32   jitter;         /* random jitter in latency (us) */
 455 };
 456
 457 struct tc_netem_corr
 458 {
 459         __u32   delay_corr;     /* delay correlation */
 460         __u32   loss_corr;      /* packet loss correlation */
 461         __u32   dup_corr;       /* duplicate correlation  */
 462 };
 463
 464 struct tc_netem_reorder
 465 {
 466         __u32   probability;
 467         __u32   correlation;
 468 };
 469
 470 struct tc_netem_corrupt
 471 {
 472         __u32   probability;
 473         __u32   correlation;
 474 };
 475
 476 #define NETEM_DIST_SCALE        8192
 477
 478 #endif