forked from mirrors/linux
c865e5d99e
Here is a new feature for netem in 2.6.16. It adds the ability to randomly corrupt packets with netem. A version was done by Hagen Paul Pfeifer, but I redid it to handle the cases of backwards compatibility with netlink interface and presence of hardware checksum offload. It is useful for testing hardware offload in devices. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
469 lines
9.5 KiB
C
469 lines
9.5 KiB
C
#ifndef __LINUX_PKT_SCHED_H
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#define __LINUX_PKT_SCHED_H
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/* Logical priority bands not depending on specific packet scheduler.
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Every scheduler will map them to real traffic classes, if it has
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no more precise mechanism to classify packets.
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These numbers have no special meaning, though their coincidence
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with obsolete IPv6 values is not occasional :-). New IPv6 drafts
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preferred full anarchy inspired by diffserv group.
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Note: TC_PRIO_BESTEFFORT does not mean that it is the most unhappy
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class, actually, as rule it will be handled with more care than
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filler or even bulk.
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*/
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#define TC_PRIO_BESTEFFORT 0
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#define TC_PRIO_FILLER 1
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#define TC_PRIO_BULK 2
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#define TC_PRIO_INTERACTIVE_BULK 4
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#define TC_PRIO_INTERACTIVE 6
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#define TC_PRIO_CONTROL 7
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#define TC_PRIO_MAX 15
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/* Generic queue statistics, available for all the elements.
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Particular schedulers may have also their private records.
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*/
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struct tc_stats
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{
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__u64 bytes; /* NUmber of enqueues bytes */
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__u32 packets; /* Number of enqueued packets */
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__u32 drops; /* Packets dropped because of lack of resources */
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__u32 overlimits; /* Number of throttle events when this
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* flow goes out of allocated bandwidth */
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__u32 bps; /* Current flow byte rate */
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__u32 pps; /* Current flow packet rate */
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__u32 qlen;
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__u32 backlog;
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};
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struct tc_estimator
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{
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signed char interval;
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unsigned char ewma_log;
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};
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/* "Handles"
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---------
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All the traffic control objects have 32bit identifiers, or "handles".
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They can be considered as opaque numbers from user API viewpoint,
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but actually they always consist of two fields: major and
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minor numbers, which are interpreted by kernel specially,
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that may be used by applications, though not recommended.
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F.e. qdisc handles always have minor number equal to zero,
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classes (or flows) have major equal to parent qdisc major, and
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minor uniquely identifying class inside qdisc.
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Macros to manipulate handles:
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*/
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#define TC_H_MAJ_MASK (0xFFFF0000U)
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#define TC_H_MIN_MASK (0x0000FFFFU)
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#define TC_H_MAJ(h) ((h)&TC_H_MAJ_MASK)
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#define TC_H_MIN(h) ((h)&TC_H_MIN_MASK)
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#define TC_H_MAKE(maj,min) (((maj)&TC_H_MAJ_MASK)|((min)&TC_H_MIN_MASK))
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#define TC_H_UNSPEC (0U)
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#define TC_H_ROOT (0xFFFFFFFFU)
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#define TC_H_INGRESS (0xFFFFFFF1U)
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struct tc_ratespec
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{
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unsigned char cell_log;
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unsigned char __reserved;
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unsigned short feature;
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short addend;
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unsigned short mpu;
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__u32 rate;
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};
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/* FIFO section */
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struct tc_fifo_qopt
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{
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__u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
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};
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/* PRIO section */
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#define TCQ_PRIO_BANDS 16
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#define TCQ_MIN_PRIO_BANDS 2
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struct tc_prio_qopt
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{
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int bands; /* Number of bands */
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__u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
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};
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/* TBF section */
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struct tc_tbf_qopt
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{
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struct tc_ratespec rate;
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struct tc_ratespec peakrate;
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__u32 limit;
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__u32 buffer;
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__u32 mtu;
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};
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enum
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{
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TCA_TBF_UNSPEC,
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TCA_TBF_PARMS,
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TCA_TBF_RTAB,
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TCA_TBF_PTAB,
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__TCA_TBF_MAX,
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};
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#define TCA_TBF_MAX (__TCA_TBF_MAX - 1)
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/* TEQL section */
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/* TEQL does not require any parameters */
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/* SFQ section */
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struct tc_sfq_qopt
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{
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unsigned quantum; /* Bytes per round allocated to flow */
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int perturb_period; /* Period of hash perturbation */
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__u32 limit; /* Maximal packets in queue */
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unsigned divisor; /* Hash divisor */
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unsigned flows; /* Maximal number of flows */
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};
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/*
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* NOTE: limit, divisor and flows are hardwired to code at the moment.
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*
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* limit=flows=128, divisor=1024;
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*
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* The only reason for this is efficiency, it is possible
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* to change these parameters in compile time.
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*/
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/* RED section */
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enum
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{
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TCA_RED_UNSPEC,
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TCA_RED_PARMS,
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TCA_RED_STAB,
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__TCA_RED_MAX,
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};
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#define TCA_RED_MAX (__TCA_RED_MAX - 1)
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struct tc_red_qopt
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{
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__u32 limit; /* HARD maximal queue length (bytes) */
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__u32 qth_min; /* Min average length threshold (bytes) */
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__u32 qth_max; /* Max average length threshold (bytes) */
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unsigned char Wlog; /* log(W) */
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unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
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unsigned char Scell_log; /* cell size for idle damping */
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unsigned char flags;
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#define TC_RED_ECN 1
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#define TC_RED_HARDDROP 2
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};
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struct tc_red_xstats
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{
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__u32 early; /* Early drops */
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__u32 pdrop; /* Drops due to queue limits */
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__u32 other; /* Drops due to drop() calls */
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__u32 marked; /* Marked packets */
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};
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/* GRED section */
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#define MAX_DPs 16
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enum
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{
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TCA_GRED_UNSPEC,
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TCA_GRED_PARMS,
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TCA_GRED_STAB,
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TCA_GRED_DPS,
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__TCA_GRED_MAX,
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};
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#define TCA_GRED_MAX (__TCA_GRED_MAX - 1)
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struct tc_gred_qopt
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{
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__u32 limit; /* HARD maximal queue length (bytes) */
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__u32 qth_min; /* Min average length threshold (bytes) */
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__u32 qth_max; /* Max average length threshold (bytes) */
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__u32 DP; /* upto 2^32 DPs */
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__u32 backlog;
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__u32 qave;
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__u32 forced;
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__u32 early;
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__u32 other;
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__u32 pdrop;
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__u8 Wlog; /* log(W) */
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__u8 Plog; /* log(P_max/(qth_max-qth_min)) */
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__u8 Scell_log; /* cell size for idle damping */
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__u8 prio; /* prio of this VQ */
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__u32 packets;
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__u32 bytesin;
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};
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/* gred setup */
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struct tc_gred_sopt
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{
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__u32 DPs;
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__u32 def_DP;
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__u8 grio;
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__u8 flags;
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__u16 pad1;
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};
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/* HTB section */
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#define TC_HTB_NUMPRIO 8
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#define TC_HTB_MAXDEPTH 8
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#define TC_HTB_PROTOVER 3 /* the same as HTB and TC's major */
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struct tc_htb_opt
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{
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struct tc_ratespec rate;
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struct tc_ratespec ceil;
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__u32 buffer;
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__u32 cbuffer;
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__u32 quantum;
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__u32 level; /* out only */
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__u32 prio;
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};
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struct tc_htb_glob
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{
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__u32 version; /* to match HTB/TC */
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__u32 rate2quantum; /* bps->quantum divisor */
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__u32 defcls; /* default class number */
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__u32 debug; /* debug flags */
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/* stats */
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__u32 direct_pkts; /* count of non shapped packets */
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};
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enum
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{
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TCA_HTB_UNSPEC,
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TCA_HTB_PARMS,
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TCA_HTB_INIT,
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TCA_HTB_CTAB,
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TCA_HTB_RTAB,
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__TCA_HTB_MAX,
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};
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#define TCA_HTB_MAX (__TCA_HTB_MAX - 1)
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struct tc_htb_xstats
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{
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__u32 lends;
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__u32 borrows;
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__u32 giants; /* too big packets (rate will not be accurate) */
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__u32 tokens;
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__u32 ctokens;
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};
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/* HFSC section */
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struct tc_hfsc_qopt
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{
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__u16 defcls; /* default class */
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};
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struct tc_service_curve
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{
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__u32 m1; /* slope of the first segment in bps */
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__u32 d; /* x-projection of the first segment in us */
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__u32 m2; /* slope of the second segment in bps */
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};
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struct tc_hfsc_stats
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{
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__u64 work; /* total work done */
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__u64 rtwork; /* work done by real-time criteria */
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__u32 period; /* current period */
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__u32 level; /* class level in hierarchy */
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};
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enum
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{
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TCA_HFSC_UNSPEC,
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TCA_HFSC_RSC,
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TCA_HFSC_FSC,
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TCA_HFSC_USC,
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__TCA_HFSC_MAX,
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};
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#define TCA_HFSC_MAX (__TCA_HFSC_MAX - 1)
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/* CBQ section */
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#define TC_CBQ_MAXPRIO 8
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#define TC_CBQ_MAXLEVEL 8
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#define TC_CBQ_DEF_EWMA 5
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struct tc_cbq_lssopt
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{
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unsigned char change;
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unsigned char flags;
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#define TCF_CBQ_LSS_BOUNDED 1
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#define TCF_CBQ_LSS_ISOLATED 2
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unsigned char ewma_log;
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unsigned char level;
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#define TCF_CBQ_LSS_FLAGS 1
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#define TCF_CBQ_LSS_EWMA 2
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#define TCF_CBQ_LSS_MAXIDLE 4
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#define TCF_CBQ_LSS_MINIDLE 8
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#define TCF_CBQ_LSS_OFFTIME 0x10
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#define TCF_CBQ_LSS_AVPKT 0x20
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__u32 maxidle;
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__u32 minidle;
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__u32 offtime;
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__u32 avpkt;
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};
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struct tc_cbq_wrropt
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{
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unsigned char flags;
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unsigned char priority;
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unsigned char cpriority;
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unsigned char __reserved;
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__u32 allot;
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__u32 weight;
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};
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struct tc_cbq_ovl
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{
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unsigned char strategy;
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#define TC_CBQ_OVL_CLASSIC 0
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#define TC_CBQ_OVL_DELAY 1
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#define TC_CBQ_OVL_LOWPRIO 2
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#define TC_CBQ_OVL_DROP 3
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#define TC_CBQ_OVL_RCLASSIC 4
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unsigned char priority2;
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__u16 pad;
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__u32 penalty;
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};
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struct tc_cbq_police
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{
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unsigned char police;
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unsigned char __res1;
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unsigned short __res2;
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};
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struct tc_cbq_fopt
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{
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__u32 split;
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__u32 defmap;
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__u32 defchange;
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};
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struct tc_cbq_xstats
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{
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__u32 borrows;
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__u32 overactions;
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__s32 avgidle;
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__s32 undertime;
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};
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enum
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{
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TCA_CBQ_UNSPEC,
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TCA_CBQ_LSSOPT,
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TCA_CBQ_WRROPT,
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TCA_CBQ_FOPT,
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TCA_CBQ_OVL_STRATEGY,
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TCA_CBQ_RATE,
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TCA_CBQ_RTAB,
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TCA_CBQ_POLICE,
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__TCA_CBQ_MAX,
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};
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#define TCA_CBQ_MAX (__TCA_CBQ_MAX - 1)
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/* dsmark section */
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enum {
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TCA_DSMARK_UNSPEC,
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TCA_DSMARK_INDICES,
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TCA_DSMARK_DEFAULT_INDEX,
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TCA_DSMARK_SET_TC_INDEX,
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TCA_DSMARK_MASK,
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TCA_DSMARK_VALUE,
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__TCA_DSMARK_MAX,
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};
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#define TCA_DSMARK_MAX (__TCA_DSMARK_MAX - 1)
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/* ATM section */
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enum {
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TCA_ATM_UNSPEC,
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TCA_ATM_FD, /* file/socket descriptor */
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TCA_ATM_PTR, /* pointer to descriptor - later */
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TCA_ATM_HDR, /* LL header */
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TCA_ATM_EXCESS, /* excess traffic class (0 for CLP) */
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TCA_ATM_ADDR, /* PVC address (for output only) */
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TCA_ATM_STATE, /* VC state (ATM_VS_*; for output only) */
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__TCA_ATM_MAX,
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};
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#define TCA_ATM_MAX (__TCA_ATM_MAX - 1)
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/* Network emulator */
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enum
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{
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TCA_NETEM_UNSPEC,
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TCA_NETEM_CORR,
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TCA_NETEM_DELAY_DIST,
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TCA_NETEM_REORDER,
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TCA_NETEM_CORRUPT,
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__TCA_NETEM_MAX,
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};
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#define TCA_NETEM_MAX (__TCA_NETEM_MAX - 1)
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struct tc_netem_qopt
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{
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__u32 latency; /* added delay (us) */
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__u32 limit; /* fifo limit (packets) */
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__u32 loss; /* random packet loss (0=none ~0=100%) */
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__u32 gap; /* re-ordering gap (0 for none) */
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__u32 duplicate; /* random packet dup (0=none ~0=100%) */
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__u32 jitter; /* random jitter in latency (us) */
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};
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struct tc_netem_corr
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{
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__u32 delay_corr; /* delay correlation */
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__u32 loss_corr; /* packet loss correlation */
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__u32 dup_corr; /* duplicate correlation */
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};
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struct tc_netem_reorder
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{
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__u32 probability;
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__u32 correlation;
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};
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struct tc_netem_corrupt
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{
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__u32 probability;
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__u32 correlation;
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};
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#define NETEM_DIST_SCALE 8192
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#endif
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