286 lines
8.9 KiB
C
286 lines
8.9 KiB
C
/*-
|
|
* Copyright (c) 1998-2010 Luigi Rizzo, Universita` di Pisa
|
|
* Portions Copyright (c) 2000 Akamba Corp.
|
|
* All rights reserved
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _IP_DUMMYNET_H
|
|
#define _IP_DUMMYNET_H
|
|
#define NEW_AQM
|
|
/*
|
|
* Definition of the kernel-userland API for dummynet.
|
|
*
|
|
* Setsockopt() and getsockopt() pass a batch of objects, each
|
|
* of them starting with a "struct dn_id" which should fully identify
|
|
* the object and its relation with others in the sequence.
|
|
* The first object in each request should have
|
|
* type= DN_CMD_*, id = DN_API_VERSION.
|
|
* For other objects, type and subtype specify the object, len indicates
|
|
* the total length including the header, and 'id' identifies the specific
|
|
* object.
|
|
*
|
|
* Most objects are numbered with an identifier in the range 1..65535.
|
|
* DN_MAX_ID indicates the first value outside the range.
|
|
*/
|
|
|
|
#define DN_API_VERSION 12500000
|
|
#define DN_MAX_ID 0x10000
|
|
|
|
struct dn_id {
|
|
uint16_t len; /* total obj len including this header */
|
|
uint8_t type;
|
|
uint8_t subtype;
|
|
uint32_t id; /* generic id */
|
|
};
|
|
|
|
/*
|
|
* These values are in the type field of struct dn_id.
|
|
* To preserve the ABI, never rearrange the list or delete
|
|
* entries with the exception of DN_LAST
|
|
*/
|
|
enum {
|
|
DN_NONE = 0,
|
|
DN_LINK = 1,
|
|
DN_FS,
|
|
DN_SCH,
|
|
DN_SCH_I,
|
|
DN_QUEUE,
|
|
DN_DELAY_LINE,
|
|
DN_PROFILE,
|
|
DN_FLOW, /* struct dn_flow */
|
|
DN_TEXT, /* opaque text is the object */
|
|
|
|
DN_CMD_CONFIG = 0x80, /* objects follow */
|
|
DN_CMD_DELETE, /* subtype + list of entries */
|
|
DN_CMD_GET, /* subtype + list of entries */
|
|
DN_CMD_FLUSH,
|
|
/* for compatibility with FreeBSD 7.2/8 */
|
|
DN_COMPAT_PIPE,
|
|
DN_COMPAT_QUEUE,
|
|
DN_GET_COMPAT,
|
|
|
|
/* special commands for emulation of sysctl variables */
|
|
DN_SYSCTL_GET,
|
|
DN_SYSCTL_SET,
|
|
#ifdef NEW_AQM
|
|
/* subtypes used for setting/getting extra parameters.
|
|
* these subtypes used with IP_DUMMYNET3 command (get)
|
|
* and DN_TEXT (set). */
|
|
DN_AQM_PARAMS, /* AQM extra params */
|
|
DN_SCH_PARAMS, /* scheduler extra params */
|
|
#endif
|
|
DN_LAST,
|
|
};
|
|
|
|
enum { /* subtype for schedulers, flowset and the like */
|
|
DN_SCHED_UNKNOWN = 0,
|
|
DN_SCHED_FIFO = 1,
|
|
DN_SCHED_WF2QP = 2,
|
|
/* others are in individual modules */
|
|
};
|
|
|
|
enum { /* user flags */
|
|
DN_HAVE_MASK = 0x0001, /* fs or sched has a mask */
|
|
DN_NOERROR = 0x0002, /* do not report errors */
|
|
DN_QHT_HASH = 0x0004, /* qht is a hash table */
|
|
DN_QSIZE_BYTES = 0x0008, /* queue size is in bytes */
|
|
DN_HAS_PROFILE = 0x0010, /* a link has a profile */
|
|
DN_IS_RED = 0x0020,
|
|
DN_IS_GENTLE_RED= 0x0040,
|
|
DN_IS_ECN = 0x0080,
|
|
#ifdef NEW_AQM
|
|
DN_IS_AQM = 0x0100, /* AQMs: e.g Codel & PIE */
|
|
#endif
|
|
DN_PIPE_CMD = 0x1000, /* pipe config... */
|
|
};
|
|
|
|
/*
|
|
* link template.
|
|
*/
|
|
struct dn_link {
|
|
struct dn_id oid;
|
|
|
|
/*
|
|
* Userland sets bw and delay in bits/s and milliseconds.
|
|
* The kernel converts this back and forth to bits/tick and ticks.
|
|
* XXX what about burst ?
|
|
*/
|
|
int32_t link_nr;
|
|
int bandwidth; /* bit/s or bits/tick. */
|
|
int delay; /* ms and ticks */
|
|
uint64_t burst; /* scaled. bits*Hz XXX */
|
|
};
|
|
|
|
/*
|
|
* A flowset, which is a template for flows. Contains parameters
|
|
* from the command line: id, target scheduler, queue sizes, plr,
|
|
* flow masks, buckets for the flow hash, and possibly scheduler-
|
|
* specific parameters (weight, quantum and so on).
|
|
*/
|
|
struct dn_fs {
|
|
struct dn_id oid;
|
|
uint32_t fs_nr; /* the flowset number */
|
|
uint32_t flags; /* userland flags */
|
|
int qsize; /* queue size in slots or bytes */
|
|
int32_t plr; /* PLR, pkt loss rate (2^31-1 means 100%) */
|
|
uint32_t buckets; /* buckets used for the queue hash table */
|
|
|
|
struct ipfw_flow_id flow_mask;
|
|
uint32_t sched_nr; /* the scheduler we attach to */
|
|
/* generic scheduler parameters. Leave them at -1 if unset.
|
|
* Now we use 0: weight, 1: lmax, 2: priority
|
|
*/
|
|
int par[4];
|
|
|
|
/* RED/GRED parameters.
|
|
* weight and probabilities are in the range 0..1 represented
|
|
* in fixed point arithmetic with SCALE_RED decimal bits.
|
|
*/
|
|
#define SCALE_RED 16
|
|
#define SCALE(x) ( (x) << SCALE_RED )
|
|
#define SCALE_VAL(x) ( (x) >> SCALE_RED )
|
|
#define SCALE_MUL(x,y) ( ( (x) * (y) ) >> SCALE_RED )
|
|
int w_q ; /* queue weight (scaled) */
|
|
int max_th ; /* maximum threshold for queue (scaled) */
|
|
int min_th ; /* minimum threshold for queue (scaled) */
|
|
int max_p ; /* maximum value for p_b (scaled) */
|
|
|
|
};
|
|
|
|
/*
|
|
* dn_flow collects flow_id and stats for queues and scheduler
|
|
* instances, and is used to pass these info to userland.
|
|
* oid.type/oid.subtype describe the object, oid.id is number
|
|
* of the parent object.
|
|
*/
|
|
struct dn_flow {
|
|
struct dn_id oid;
|
|
struct ipfw_flow_id fid;
|
|
uint64_t tot_pkts; /* statistics counters */
|
|
uint64_t tot_bytes;
|
|
uint32_t length; /* Queue length, in packets */
|
|
uint32_t len_bytes; /* Queue length, in bytes */
|
|
uint32_t drops;
|
|
};
|
|
|
|
|
|
/*
|
|
* Scheduler template, mostly indicating the name, number,
|
|
* sched_mask and buckets.
|
|
*/
|
|
struct dn_sch {
|
|
struct dn_id oid;
|
|
uint32_t sched_nr; /* N, scheduler number */
|
|
uint32_t buckets; /* number of buckets for the instances */
|
|
uint32_t flags; /* have_mask, ... */
|
|
|
|
char name[16]; /* null terminated */
|
|
/* mask to select the appropriate scheduler instance */
|
|
struct ipfw_flow_id sched_mask; /* M */
|
|
};
|
|
|
|
|
|
/* A delay profile is attached to a link.
|
|
* Note that a profile, as any other object, cannot be longer than 2^16
|
|
*/
|
|
#define ED_MAX_SAMPLES_NO 1024
|
|
struct dn_profile {
|
|
struct dn_id oid;
|
|
/* fields to simulate a delay profile */
|
|
#define ED_MAX_NAME_LEN 32
|
|
char name[ED_MAX_NAME_LEN];
|
|
int link_nr;
|
|
int loss_level;
|
|
int bandwidth; // XXX use link bandwidth?
|
|
int samples_no; /* actual len of samples[] */
|
|
int samples[ED_MAX_SAMPLES_NO]; /* may be shorter */
|
|
};
|
|
|
|
#ifdef NEW_AQM
|
|
/* Extra parameters for AQM and scheduler.
|
|
* This struct is used to pass and retrieve parameters (configurations)
|
|
* to/from AQM and Scheduler.
|
|
*/
|
|
struct dn_extra_parms {
|
|
struct dn_id oid;
|
|
char name[16];
|
|
uint32_t nr;
|
|
#define DN_MAX_EXTRA_PARM 10
|
|
int64_t par[DN_MAX_EXTRA_PARM];
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* Overall structure of dummynet
|
|
|
|
In dummynet, packets are selected with the firewall rules, and passed
|
|
to two different objects: PIPE or QUEUE (bad name).
|
|
|
|
A QUEUE defines a classifier, which groups packets into flows
|
|
according to a 'mask', puts them into independent queues (one
|
|
per flow) with configurable size and queue management policy,
|
|
and passes flows to a scheduler:
|
|
|
|
(flow_mask|sched_mask) sched_mask
|
|
+---------+ weight Wx +-------------+
|
|
| |->-[flow]-->--| |-+
|
|
-->--| QUEUE x | ... | | |
|
|
| |->-[flow]-->--| SCHEDuler N | |
|
|
+---------+ | | |
|
|
... | +--[LINK N]-->--
|
|
+---------+ weight Wy | | +--[LINK N]-->--
|
|
| |->-[flow]-->--| | |
|
|
-->--| QUEUE y | ... | | |
|
|
| |->-[flow]-->--| | |
|
|
+---------+ +-------------+ |
|
|
+-------------+
|
|
|
|
Many QUEUE objects can connect to the same scheduler, each
|
|
QUEUE object can have its own set of parameters.
|
|
|
|
In turn, the SCHEDuler 'forks' multiple instances according
|
|
to a 'sched_mask', each instance manages its own set of queues
|
|
and transmits on a private instance of a configurable LINK.
|
|
|
|
A PIPE is a simplified version of the above, where there
|
|
is no flow_mask, and each scheduler instance handles a single queue.
|
|
|
|
The following data structures (visible from userland) describe
|
|
the objects used by dummynet:
|
|
|
|
+ dn_link, contains the main configuration parameters related
|
|
to delay and bandwidth;
|
|
+ dn_profile describes a delay profile;
|
|
+ dn_flow describes the flow status (flow id, statistics)
|
|
|
|
+ dn_sch describes a scheduler
|
|
+ dn_fs describes a flowset (msk, weight, queue parameters)
|
|
|
|
*
|
|
*/
|
|
|
|
#endif /* _IP_DUMMYNET_H */
|