pkt_sched.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:8k
- #ifndef __LINUX_PKT_SCHED_H
- #define __LINUX_PKT_SCHED_H
- /* Logical priority bands not depending on specific packet scheduler.
- Every scheduler will map them to real traffic classes, if it has
- no more precise mechanism to classify packets.
- These numbers have no special meaning, though their coincidence
- with obsolete IPv6 values is not occasional :-). New IPv6 drafts
- preferred full anarchy inspired by diffserv group.
- Note: TC_PRIO_BESTEFFORT does not mean that it is the most unhappy
- class, actually, as rule it will be handled with more care than
- filler or even bulk.
- */
- #define TC_PRIO_BESTEFFORT 0
- #define TC_PRIO_FILLER 1
- #define TC_PRIO_BULK 2
- #define TC_PRIO_INTERACTIVE_BULK 4
- #define TC_PRIO_INTERACTIVE 6
- #define TC_PRIO_CONTROL 7
- #define TC_PRIO_MAX 15
- /* Generic queue statistics, available for all the elements.
- Particular schedulers may have also their private records.
- */
- struct tc_stats
- {
- __u64 bytes; /* NUmber of enqueues bytes */
- __u32 packets; /* Number of enqueued packets */
- __u32 drops; /* Packets dropped because of lack of resources */
- __u32 overlimits; /* Number of throttle events when this
- * flow goes out of allocated bandwidth */
- __u32 bps; /* Current flow byte rate */
- __u32 pps; /* Current flow packet rate */
- __u32 qlen;
- __u32 backlog;
- #ifdef __KERNEL__
- spinlock_t *lock;
- #endif
- };
- struct tc_estimator
- {
- char interval;
- unsigned char ewma_log;
- };
- /* "Handles"
- ---------
- All the traffic control objects have 32bit identifiers, or "handles".
- They can be considered as opaque numbers from user API viewpoint,
- but actually they always consist of two fields: major and
- minor numbers, which are interpreted by kernel specially,
- that may be used by applications, though not recommended.
- F.e. qdisc handles always have minor number equal to zero,
- classes (or flows) have major equal to parent qdisc major, and
- minor uniquely identifying class inside qdisc.
- Macros to manipulate handles:
- */
- #define TC_H_MAJ_MASK (0xFFFF0000U)
- #define TC_H_MIN_MASK (0x0000FFFFU)
- #define TC_H_MAJ(h) ((h)&TC_H_MAJ_MASK)
- #define TC_H_MIN(h) ((h)&TC_H_MIN_MASK)
- #define TC_H_MAKE(maj,min) (((maj)&TC_H_MAJ_MASK)|((min)&TC_H_MIN_MASK))
- #define TC_H_UNSPEC (0U)
- #define TC_H_ROOT (0xFFFFFFFFU)
- #define TC_H_INGRESS (0xFFFFFFF1U)
- struct tc_ratespec
- {
- unsigned char cell_log;
- unsigned char __reserved;
- unsigned short feature;
- short addend;
- unsigned short mpu;
- __u32 rate;
- };
- /* FIFO section */
- struct tc_fifo_qopt
- {
- __u32 limit; /* Queue length: bytes for bfifo, packets for pfifo */
- };
- /* PRIO section */
- #define TCQ_PRIO_BANDS 16
- struct tc_prio_qopt
- {
- int bands; /* Number of bands */
- __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
- };
- /* CSZ section */
- struct tc_csz_qopt
- {
- int flows; /* Maximal number of guaranteed flows */
- unsigned char R_log; /* Fixed point position for round number */
- unsigned char delta_log; /* Log of maximal managed time interval */
- __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> CSZ band */
- };
- struct tc_csz_copt
- {
- struct tc_ratespec slice;
- struct tc_ratespec rate;
- struct tc_ratespec peakrate;
- __u32 limit;
- __u32 buffer;
- __u32 mtu;
- };
- enum
- {
- TCA_CSZ_UNSPEC,
- TCA_CSZ_PARMS,
- TCA_CSZ_RTAB,
- TCA_CSZ_PTAB,
- };
- /* TBF section */
- struct tc_tbf_qopt
- {
- struct tc_ratespec rate;
- struct tc_ratespec peakrate;
- __u32 limit;
- __u32 buffer;
- __u32 mtu;
- };
- enum
- {
- TCA_TBF_UNSPEC,
- TCA_TBF_PARMS,
- TCA_TBF_RTAB,
- TCA_TBF_PTAB,
- };
- /* TEQL section */
- /* TEQL does not require any parameters */
- /* SFQ section */
- struct tc_sfq_qopt
- {
- unsigned quantum; /* Bytes per round allocated to flow */
- int perturb_period; /* Period of hash perturbation */
- __u32 limit; /* Maximal packets in queue */
- unsigned divisor; /* Hash divisor */
- unsigned flows; /* Maximal number of flows */
- };
- /*
- * NOTE: limit, divisor and flows are hardwired to code at the moment.
- *
- * limit=flows=128, divisor=1024;
- *
- * The only reason for this is efficiency, it is possible
- * to change these parameters in compile time.
- */
- /* RED section */
- enum
- {
- TCA_RED_UNSPEC,
- TCA_RED_PARMS,
- TCA_RED_STAB,
- };
- struct tc_red_qopt
- {
- __u32 limit; /* HARD maximal queue length (bytes) */
- __u32 qth_min; /* Min average length threshold (bytes) */
- __u32 qth_max; /* Max average length threshold (bytes) */
- unsigned char Wlog; /* log(W) */
- unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
- unsigned char Scell_log; /* cell size for idle damping */
- unsigned char flags;
- #define TC_RED_ECN 1
- };
- struct tc_red_xstats
- {
- __u32 early; /* Early drops */
- __u32 pdrop; /* Drops due to queue limits */
- __u32 other; /* Drops due to drop() calls */
- __u32 marked; /* Marked packets */
- };
- /* GRED section */
- #define MAX_DPs 16
- enum
- {
- TCA_GRED_UNSPEC,
- TCA_GRED_PARMS,
- TCA_GRED_STAB,
- TCA_GRED_DPS,
- };
- #define TCA_SET_OFF TCA_GRED_PARMS
- struct tc_gred_qopt
- {
- __u32 limit; /* HARD maximal queue length (bytes)
- */
- __u32 qth_min; /* Min average length threshold (bytes)
- */
- __u32 qth_max; /* Max average length threshold (bytes)
- */
- __u32 DP; /* upto 2^32 DPs */
- __u32 backlog;
- __u32 qave;
- __u32 forced;
- __u32 early;
- __u32 other;
- __u32 pdrop;
- unsigned char Wlog; /* log(W) */
- unsigned char Plog; /* log(P_max/(qth_max-qth_min)) */
- unsigned char Scell_log; /* cell size for idle damping */
- __u8 prio; /* prio of this VQ */
- __u32 packets;
- __u32 bytesin;
- };
- /* gred setup */
- struct tc_gred_sopt
- {
- __u32 DPs;
- __u32 def_DP;
- __u8 grio;
- };
- /* CBQ section */
- #define TC_CBQ_MAXPRIO 8
- #define TC_CBQ_MAXLEVEL 8
- #define TC_CBQ_DEF_EWMA 5
- struct tc_cbq_lssopt
- {
- unsigned char change;
- unsigned char flags;
- #define TCF_CBQ_LSS_BOUNDED 1
- #define TCF_CBQ_LSS_ISOLATED 2
- unsigned char ewma_log;
- unsigned char level;
- #define TCF_CBQ_LSS_FLAGS 1
- #define TCF_CBQ_LSS_EWMA 2
- #define TCF_CBQ_LSS_MAXIDLE 4
- #define TCF_CBQ_LSS_MINIDLE 8
- #define TCF_CBQ_LSS_OFFTIME 0x10
- #define TCF_CBQ_LSS_AVPKT 0x20
- __u32 maxidle;
- __u32 minidle;
- __u32 offtime;
- __u32 avpkt;
- };
- struct tc_cbq_wrropt
- {
- unsigned char flags;
- unsigned char priority;
- unsigned char cpriority;
- unsigned char __reserved;
- __u32 allot;
- __u32 weight;
- };
- struct tc_cbq_ovl
- {
- unsigned char strategy;
- #define TC_CBQ_OVL_CLASSIC 0
- #define TC_CBQ_OVL_DELAY 1
- #define TC_CBQ_OVL_LOWPRIO 2
- #define TC_CBQ_OVL_DROP 3
- #define TC_CBQ_OVL_RCLASSIC 4
- unsigned char priority2;
- __u32 penalty;
- };
- struct tc_cbq_police
- {
- unsigned char police;
- unsigned char __res1;
- unsigned short __res2;
- };
- struct tc_cbq_fopt
- {
- __u32 split;
- __u32 defmap;
- __u32 defchange;
- };
- struct tc_cbq_xstats
- {
- __u32 borrows;
- __u32 overactions;
- __s32 avgidle;
- __s32 undertime;
- };
- enum
- {
- TCA_CBQ_UNSPEC,
- TCA_CBQ_LSSOPT,
- TCA_CBQ_WRROPT,
- TCA_CBQ_FOPT,
- TCA_CBQ_OVL_STRATEGY,
- TCA_CBQ_RATE,
- TCA_CBQ_RTAB,
- TCA_CBQ_POLICE,
- };
- #define TCA_CBQ_MAX TCA_CBQ_POLICE
- /* dsmark section */
- enum {
- TCA_DSMARK_UNSPEC,
- TCA_DSMARK_INDICES,
- TCA_DSMARK_DEFAULT_INDEX,
- TCA_DSMARK_SET_TC_INDEX,
- TCA_DSMARK_MASK,
- TCA_DSMARK_VALUE
- };
- #define TCA_DSMARK_MAX TCA_DSMARK_VALUE
- /* ATM section */
- enum {
- TCA_ATM_UNSPEC,
- TCA_ATM_FD, /* file/socket descriptor */
- TCA_ATM_PTR, /* pointer to descriptor - later */
- TCA_ATM_HDR, /* LL header */
- TCA_ATM_EXCESS, /* excess traffic class (0 for CLP) */
- TCA_ATM_ADDR, /* PVC address (for output only) */
- TCA_ATM_STATE /* VC state (ATM_VS_*; for output only) */
- };
- #define TCA_ATM_MAX TCA_ATM_STATE
- #endif