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freebsd-skq/sys/netinet/ipfw/ip_dn_glue.c
Luigi Rizzo cc4d3c30ea Bring in the most recent version of ipfw and dummynet, developed 
and tested over the past two months in the ipfw3-head branch.  This
also happens to be the same code available in the Linux and Windows
ports of ipfw and dummynet.

The major enhancement is a completely restructured version of
dummynet, with support for different packet scheduling algorithms
(loadable at runtime), faster queue/pipe lookup, and a much cleaner
internal architecture and kernel/userland ABI which simplifies
future extensions.

In addition to the existing schedulers (FIFO and WF2Q+), we include
a Deficit Round Robin (DRR or RR for brevity) scheduler, and a new,
very fast version of WF2Q+ called QFQ.

Some test code is also present (in sys/netinet/ipfw/test) that
lets you build and test schedulers in userland.

Also, we have added a compatibility layer that understands requests
from the RELENG_7 and RELENG_8 versions of the /sbin/ipfw binaries,
and replies correctly (at least, it does its best; sometimes you
just cannot tell who sent the request and how to answer).
The compatibility layer should make it possible to MFC this code in a
relatively short time.

Some minor glitches (e.g. handling of ipfw set enable/disable,
and a workaround for a bug in RELENG_7's /sbin/ipfw) will be
fixed with separate commits.

CREDITS:
This work has been partly supported by the ONELAB2 project, and
mostly developed by Riccardo Panicucci and myself.
The code for the qfq scheduler is mostly from Fabio Checconi,
and Marta Carbone and Francesco Magno have helped with testing,
debugging and some bug fixes.
2010-03-02 17:40:48 +00:00

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/*-
* Copyright (c) 2010 Riccardo Panicucci, Universita` di Pisa
* 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.
*/
/*
* $FreeBSD$
*
* Binary compatibility support for /sbin/ipfw RELENG_7 and RELENG_8
*/
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/time.h>
#include <sys/taskqueue.h>
#include <net/if.h> /* IFNAMSIZ, struct ifaddr, ifq head, lock.h mutex.h */
#include <netinet/in.h>
#include <netinet/ip_var.h> /* ip_output(), IP_FORWARDING */
#include <netinet/ip_fw.h>
#include <netinet/ipfw/ip_fw_private.h>
#include <netinet/ipfw/dn_heap.h>
#include <netinet/ip_dummynet.h>
#include <netinet/ipfw/ip_dn_private.h>
#include <netinet/ipfw/dn_sched.h>
/* FREEBSD7.2 ip_dummynet.h r191715*/
struct dn_heap_entry7 {
int64_t key; /* sorting key. Topmost element is smallest one */
void *object; /* object pointer */
};
struct dn_heap7 {
int size;
int elements;
int offset; /* XXX if > 0 this is the offset of direct ptr to obj */
struct dn_heap_entry7 *p; /* really an array of "size" entries */
};
/* Common to 7.2 and 8 */
struct dn_flow_set {
SLIST_ENTRY(dn_flow_set) next; /* linked list in a hash slot */
u_short fs_nr ; /* flow_set number */
u_short flags_fs;
#define DNOLD_HAVE_FLOW_MASK 0x0001
#define DNOLD_IS_RED 0x0002
#define DNOLD_IS_GENTLE_RED 0x0004
#define DNOLD_QSIZE_IS_BYTES 0x0008 /* queue size is measured in bytes */
#define DNOLD_NOERROR 0x0010 /* do not report ENOBUFS on drops */
#define DNOLD_HAS_PROFILE 0x0020 /* the pipe has a delay profile. */
#define DNOLD_IS_PIPE 0x4000
#define DNOLD_IS_QUEUE 0x8000
struct dn_pipe7 *pipe ; /* pointer to parent pipe */
u_short parent_nr ; /* parent pipe#, 0 if local to a pipe */
int weight ; /* WFQ queue weight */
int qsize ; /* queue size in slots or bytes */
int plr ; /* pkt loss rate (2^31-1 means 100%) */
struct ipfw_flow_id flow_mask ;
/* hash table of queues onto this flow_set */
int rq_size ; /* number of slots */
int rq_elements ; /* active elements */
struct dn_flow_queue7 **rq; /* array of rq_size entries */
u_int32_t last_expired ; /* do not expire too frequently */
int backlogged ; /* #active queues for this flowset */
/* RED parameters */
#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) */
u_int c_1 ; /* max_p/(max_th-min_th) (scaled) */
u_int c_2 ; /* max_p*min_th/(max_th-min_th) (scaled) */
u_int c_3 ; /* for GRED, (1-max_p)/max_th (scaled) */
u_int c_4 ; /* for GRED, 1 - 2*max_p (scaled) */
u_int * w_q_lookup ; /* lookup table for computing (1-w_q)^t */
u_int lookup_depth ; /* depth of lookup table */
int lookup_step ; /* granularity inside the lookup table */
int lookup_weight ; /* equal to (1-w_q)^t / (1-w_q)^(t+1) */
int avg_pkt_size ; /* medium packet size */
int max_pkt_size ; /* max packet size */
};
SLIST_HEAD(dn_flow_set_head, dn_flow_set);
#define DN_IS_PIPE 0x4000
#define DN_IS_QUEUE 0x8000
struct dn_flow_queue7 {
struct dn_flow_queue7 *next ;
struct ipfw_flow_id id ;
struct mbuf *head, *tail ; /* queue of packets */
u_int len ;
u_int len_bytes ;
u_long numbytes;
u_int64_t tot_pkts ; /* statistics counters */
u_int64_t tot_bytes ;
u_int32_t drops ;
int hash_slot ; /* debugging/diagnostic */
/* RED parameters */
int avg ; /* average queue length est. (scaled) */
int count ; /* arrivals since last RED drop */
int random ; /* random value (scaled) */
u_int32_t q_time; /* start of queue idle time */
/* WF2Q+ support */
struct dn_flow_set *fs ; /* parent flow set */
int heap_pos ; /* position (index) of struct in heap */
int64_t sched_time ; /* current time when queue enters ready_heap */
int64_t S,F ; /* start time, finish time */
};
struct dn_pipe7 { /* a pipe */
SLIST_ENTRY(dn_pipe7) next; /* linked list in a hash slot */
int pipe_nr ; /* number */
int bandwidth; /* really, bytes/tick. */
int delay ; /* really, ticks */
struct mbuf *head, *tail ; /* packets in delay line */
/* WF2Q+ */
struct dn_heap7 scheduler_heap ; /* top extract - key Finish time*/
struct dn_heap7 not_eligible_heap; /* top extract- key Start time */
struct dn_heap7 idle_heap ; /* random extract - key Start=Finish time */
int64_t V ; /* virtual time */
int sum; /* sum of weights of all active sessions */
int numbytes;
int64_t sched_time ; /* time pipe was scheduled in ready_heap */
/*
* When the tx clock come from an interface (if_name[0] != '\0'), its name
* is stored below, whereas the ifp is filled when the rule is configured.
*/
char if_name[IFNAMSIZ];
struct ifnet *ifp ;
int ready ; /* set if ifp != NULL and we got a signal from it */
struct dn_flow_set fs ; /* used with fixed-rate flows */
};
SLIST_HEAD(dn_pipe_head7, dn_pipe7);
/* FREEBSD8 ip_dummynet.h r196045 */
struct dn_flow_queue8 {
struct dn_flow_queue8 *next ;
struct ipfw_flow_id id ;
struct mbuf *head, *tail ; /* queue of packets */
u_int len ;
u_int len_bytes ;
uint64_t numbytes ; /* credit for transmission (dynamic queues) */
int64_t extra_bits; /* extra bits simulating unavailable channel */
u_int64_t tot_pkts ; /* statistics counters */
u_int64_t tot_bytes ;
u_int32_t drops ;
int hash_slot ; /* debugging/diagnostic */
/* RED parameters */
int avg ; /* average queue length est. (scaled) */
int count ; /* arrivals since last RED drop */
int random ; /* random value (scaled) */
int64_t idle_time; /* start of queue idle time */
/* WF2Q+ support */
struct dn_flow_set *fs ; /* parent flow set */
int heap_pos ; /* position (index) of struct in heap */
int64_t sched_time ; /* current time when queue enters ready_heap */
int64_t S,F ; /* start time, finish time */
};
struct dn_pipe8 { /* a pipe */
SLIST_ENTRY(dn_pipe8) next; /* linked list in a hash slot */
int pipe_nr ; /* number */
int bandwidth; /* really, bytes/tick. */
int delay ; /* really, ticks */
struct mbuf *head, *tail ; /* packets in delay line */
/* WF2Q+ */
struct dn_heap7 scheduler_heap ; /* top extract - key Finish time*/
struct dn_heap7 not_eligible_heap; /* top extract- key Start time */
struct dn_heap7 idle_heap ; /* random extract - key Start=Finish time */
int64_t V ; /* virtual time */
int sum; /* sum of weights of all active sessions */
/* Same as in dn_flow_queue, numbytes can become large */
int64_t numbytes; /* bits I can transmit (more or less). */
uint64_t burst; /* burst size, scaled: bits * hz */
int64_t sched_time ; /* time pipe was scheduled in ready_heap */
int64_t idle_time; /* start of pipe idle time */
char if_name[IFNAMSIZ];
struct ifnet *ifp ;
int ready ; /* set if ifp != NULL and we got a signal from it */
struct dn_flow_set fs ; /* used with fixed-rate flows */
/* fields to simulate a delay profile */
#define ED_MAX_NAME_LEN 32
char name[ED_MAX_NAME_LEN];
int loss_level;
int samples_no;
int *samples;
};
#define ED_MAX_SAMPLES_NO 1024
struct dn_pipe_max8 {
struct dn_pipe8 pipe;
int samples[ED_MAX_SAMPLES_NO];
};
SLIST_HEAD(dn_pipe_head8, dn_pipe8);
/*
* Changes from 7.2 to 8:
* dn_pipe:
* numbytes from int to int64_t
* add burst (int64_t)
* add idle_time (int64_t)
* add profile
* add struct dn_pipe_max
* add flag DN_HAS_PROFILE
*
* dn_flow_queue
* numbytes from u_long to int64_t
* add extra_bits (int64_t)
* q_time from u_int32_t to int64_t and name idle_time
*
* dn_flow_set unchanged
*
*/
/* NOTE:XXX copied from dummynet.c */
#define O_NEXT(p, len) ((void *)((char *)p + len))
static void
oid_fill(struct dn_id *oid, int len, int type, uintptr_t id)
{
oid->len = len;
oid->type = type;
oid->subtype = 0;
oid->id = id;
}
/* make room in the buffer and move the pointer forward */
static void *
o_next(struct dn_id **o, int len, int type)
{
struct dn_id *ret = *o;
oid_fill(ret, len, type, 0);
*o = O_NEXT(*o, len);
return ret;
}
static size_t pipesize7 = sizeof(struct dn_pipe7);
static size_t pipesize8 = sizeof(struct dn_pipe8);
static size_t pipesizemax8 = sizeof(struct dn_pipe_max8);
/* Indicate 'ipfw' version
* 1: from FreeBSD 7.2
* 0: from FreeBSD 8
* -1: unknow (for now is unused)
*
* It is update when a IP_DUMMYNET_DEL or IP_DUMMYNET_CONFIGURE request arrives
* NOTE: if a IP_DUMMYNET_GET arrives and the 'ipfw' version is unknow,
* it is suppose to be the FreeBSD 8 version.
*/
static int is7 = 0;
static int
convertflags2new(int src)
{
int dst = 0;
if (src & DNOLD_HAVE_FLOW_MASK)
dst |= DN_HAVE_MASK;
if (src & DNOLD_QSIZE_IS_BYTES)
dst |= DN_QSIZE_BYTES;
if (src & DNOLD_NOERROR)
dst |= DN_NOERROR;
if (src & DNOLD_IS_RED)
dst |= DN_IS_RED;
if (src & DNOLD_IS_GENTLE_RED)
dst |= DN_IS_GENTLE_RED;
if (src & DNOLD_HAS_PROFILE)
dst |= DN_HAS_PROFILE;
return dst;
}
static int
convertflags2old(int src)
{
int dst = 0;
if (src & DN_HAVE_MASK)
dst |= DNOLD_HAVE_FLOW_MASK;
if (src & DN_IS_RED)
dst |= DNOLD_IS_RED;
if (src & DN_IS_GENTLE_RED)
dst |= DNOLD_IS_GENTLE_RED;
if (src & DN_NOERROR)
dst |= DNOLD_NOERROR;
if (src & DN_HAS_PROFILE)
dst |= DNOLD_HAS_PROFILE;
if (src & DN_QSIZE_BYTES)
dst |= DNOLD_QSIZE_IS_BYTES;
return dst;
}
static int
dn_compat_del(void *v)
{
struct dn_pipe7 *p = (struct dn_pipe7 *) v;
struct dn_pipe8 *p8 = (struct dn_pipe8 *) v;
struct {
struct dn_id oid;
uintptr_t a[1]; /* add more if we want a list */
} cmd;
/* XXX DN_API_VERSION ??? */
oid_fill((void *)&cmd, sizeof(cmd), DN_CMD_DELETE, DN_API_VERSION);
if (is7) {
if (p->pipe_nr == 0 && p->fs.fs_nr == 0)
return EINVAL;
if (p->pipe_nr != 0 && p->fs.fs_nr != 0)
return EINVAL;
} else {
if (p8->pipe_nr == 0 && p8->fs.fs_nr == 0)
return EINVAL;
if (p8->pipe_nr != 0 && p8->fs.fs_nr != 0)
return EINVAL;
}
if (p->pipe_nr != 0) { /* pipe x delete */
cmd.a[0] = p->pipe_nr;
cmd.oid.subtype = DN_LINK;
} else { /* queue x delete */
cmd.oid.subtype = DN_FS;
cmd.a[0] = (is7) ? p->fs.fs_nr : p8->fs.fs_nr;
}
return do_config(&cmd, cmd.oid.len);
}
static int
dn_compat_config_queue(struct dn_fs *fs, void* v)
{
struct dn_pipe7 *p7 = (struct dn_pipe7 *)v;
struct dn_pipe8 *p8 = (struct dn_pipe8 *)v;
struct dn_flow_set *f;
if (is7)
f = &p7->fs;
else
f = &p8->fs;
fs->fs_nr = f->fs_nr;
fs->sched_nr = f->parent_nr;
fs->flow_mask = f->flow_mask;
fs->buckets = f->rq_size;
fs->qsize = f->qsize;
fs->plr = f->plr;
fs->par[0] = f->weight;
fs->flags = convertflags2new(f->flags_fs);
if (fs->flags & DN_IS_GENTLE_RED || fs->flags & DN_IS_RED) {
fs->w_q = f->w_q;
fs->max_th = f->max_th;
fs->min_th = f->min_th;
fs->max_p = f->max_p;
}
return 0;
}
static int
dn_compat_config_pipe(struct dn_sch *sch, struct dn_link *p,
struct dn_fs *fs, void* v)
{
struct dn_pipe7 *p7 = (struct dn_pipe7 *)v;
struct dn_pipe8 *p8 = (struct dn_pipe8 *)v;
int i = p7->pipe_nr;
sch->sched_nr = i;
sch->oid.subtype = 0;
p->link_nr = i;
fs->fs_nr = i + 2*DN_MAX_ID;
fs->sched_nr = i + DN_MAX_ID;
/* Common to 7 and 8 */
p->bandwidth = p7->bandwidth;
p->delay = p7->delay;
if (!is7) {
/* FreeBSD 8 has burst */
p->burst = p8->burst;
}
/* fill the fifo flowset */
dn_compat_config_queue(fs, v);
fs->fs_nr = i + 2*DN_MAX_ID;
fs->sched_nr = i + DN_MAX_ID;
/* Move scheduler related parameter from fs to sch */
sch->buckets = fs->buckets; /*XXX*/
fs->buckets = 0;
if (fs->flags & DN_HAVE_MASK) {
sch->flags |= DN_HAVE_MASK;
fs->flags &= ~DN_HAVE_MASK;
sch->sched_mask = fs->flow_mask;
bzero(&fs->flow_mask, sizeof(struct ipfw_flow_id));
}
return 0;
}
static int
dn_compat_config_profile(struct dn_profile *pf, struct dn_link *p,
void *v)
{
struct dn_pipe8 *p8 = (struct dn_pipe8 *)v;
p8->samples = &(((struct dn_pipe_max8 *)p8)->samples[0]);
pf->link_nr = p->link_nr;
pf->loss_level = p8->loss_level;
// pf->bandwidth = p->bandwidth; //XXX bandwidth redundant?
pf->samples_no = p8->samples_no;
strncpy(pf->name, p8->name,sizeof(pf->name));
bcopy(p8->samples, pf->samples, sizeof(pf->samples));
return 0;
}
/*
* If p->pipe_nr != 0 the command is 'pipe x config', so need to create
* the three main struct, else only a flowset is created
*/
static int
dn_compat_configure(void *v)
{
struct dn_id *buf, *base;
struct dn_sch *sch = NULL;
struct dn_link *p = NULL;
struct dn_fs *fs = NULL;
struct dn_profile *pf = NULL;
int lmax;
int error;
struct dn_pipe7 *p7 = (struct dn_pipe7 *)v;
struct dn_pipe8 *p8 = (struct dn_pipe8 *)v;
int i; /* number of object to configure */
lmax = sizeof(struct dn_id); /* command header */
lmax += sizeof(struct dn_sch) + sizeof(struct dn_link) +
sizeof(struct dn_fs) + sizeof(struct dn_profile);
base = buf = malloc(lmax, M_DUMMYNET, M_WAIT|M_ZERO);
o_next(&buf, sizeof(struct dn_id), DN_CMD_CONFIG);
base->id = DN_API_VERSION;
/* pipe_nr is the same in p7 and p8 */
i = p7->pipe_nr;
if (i != 0) { /* pipe config */
sch = o_next(&buf, sizeof(*sch), DN_SCH);
p = o_next(&buf, sizeof(*p), DN_LINK);
fs = o_next(&buf, sizeof(*fs), DN_FS);
error = dn_compat_config_pipe(sch, p, fs, v);
if (error) {
free(buf, M_DUMMYNET);
return error;
}
if (!is7 && p8->samples_no > 0) {
/* Add profiles*/
pf = o_next(&buf, sizeof(*pf), DN_PROFILE);
error = dn_compat_config_profile(pf, p, v);
if (error) {
free(buf, M_DUMMYNET);
return error;
}
}
} else { /* queue config */
fs = o_next(&buf, sizeof(*fs), DN_FS);
error = dn_compat_config_queue(fs, v);
if (error) {
free(buf, M_DUMMYNET);
return error;
}
}
error = do_config(base, (char *)buf - (char *)base);
return error;
}
int
dn_compat_calc_size(struct dn_parms dn_cfg)
{
int need = 0;
/* XXX use FreeBSD 8 struct size */
/* NOTE:
* - half scheduler: schk_count/2
* - all flowset: fsk_count
* - all flowset queues: queue_count
* - all pipe queue: si_count
*/
need += dn_cfg.schk_count * sizeof(struct dn_pipe8) / 2;
need += dn_cfg.fsk_count * sizeof(struct dn_flow_set);
need += dn_cfg.si_count * sizeof(struct dn_flow_queue8);
need += dn_cfg.queue_count * sizeof(struct dn_flow_queue8);
return need;
}
int
dn_c_copy_q (void *_ni, void *arg)
{
struct copy_args *a = arg;
struct dn_flow_queue7 *fq7 = (struct dn_flow_queue7 *)*a->start;
struct dn_flow_queue8 *fq8 = (struct dn_flow_queue8 *)*a->start;
struct dn_flow *ni = (struct dn_flow *)_ni;
int size = 0;
/* XXX hash slot not set */
/* No difference between 7.2/8 */
fq7->len = ni->length;
fq7->len_bytes = ni->len_bytes;
fq7->id = ni->fid;
if (is7) {
size = sizeof(struct dn_flow_queue7);
fq7->tot_pkts = ni->tot_pkts;
fq7->tot_bytes = ni->tot_bytes;
fq7->drops = ni->drops;
} else {
size = sizeof(struct dn_flow_queue8);
fq8->tot_pkts = ni->tot_pkts;
fq8->tot_bytes = ni->tot_bytes;
fq8->drops = ni->drops;
}
*a->start += size;
return 0;
}
int
dn_c_copy_pipe(struct dn_schk *s, struct copy_args *a, int nq)
{
struct dn_link *l = &s->link;
struct dn_fsk *f = s->fs;
struct dn_pipe7 *pipe7 = (struct dn_pipe7 *)*a->start;
struct dn_pipe8 *pipe8 = (struct dn_pipe8 *)*a->start;
struct dn_flow_set *fs;
int size = 0;
if (is7) {
fs = &pipe7->fs;
size = sizeof(struct dn_pipe7);
} else {
fs = &pipe8->fs;
size = sizeof(struct dn_pipe8);
}
/* These 4 field are the same in pipe7 and pipe8 */
pipe7->next.sle_next = (struct dn_pipe7 *)DN_IS_PIPE;
pipe7->bandwidth = l->bandwidth;
pipe7->delay = l->delay;
pipe7->pipe_nr = l->link_nr - DN_MAX_ID;
if (!is7) {
if (s->profile) {
struct dn_profile *pf = s->profile;
strncpy(pipe8->name, pf->name, sizeof(pf->name));
pipe8->loss_level = pf->loss_level;
pipe8->samples_no = pf->samples_no;
}
pipe8->burst = div64(l->burst , 8 * hz);
}
fs->flow_mask = s->sch.sched_mask;
fs->rq_size = s->sch.buckets ? s->sch.buckets : 1;
fs->parent_nr = l->link_nr - DN_MAX_ID;
fs->qsize = f->fs.qsize;
fs->plr = f->fs.plr;
fs->w_q = f->fs.w_q;
fs->max_th = f->max_th;
fs->min_th = f->min_th;
fs->max_p = f->fs.max_p;
fs->rq_elements = nq;
fs->flags_fs = convertflags2old(f->fs.flags);
*a->start += size;
return 0;
}
int
dn_compat_copy_pipe(struct copy_args *a, void *_o)
{
int have = a->end - *a->start;
int need = 0;
int pipe_size = sizeof(struct dn_pipe8);
int queue_size = sizeof(struct dn_flow_queue8);
int n_queue = 0; /* number of queues */
struct dn_schk *s = (struct dn_schk *)_o;
/* calculate needed space:
* - struct dn_pipe
* - if there are instances, dn_queue * n_instances
*/
n_queue = (s->sch.flags & DN_HAVE_MASK ? dn_ht_entries(s->siht) :
(s->siht ? 1 : 0));
need = pipe_size + queue_size * n_queue;
if (have < need) {
D("have %d < need %d", have, need);
return 1;
}
/* copy pipe */
dn_c_copy_pipe(s, a, n_queue);
/* copy queues */
if (s->sch.flags & DN_HAVE_MASK)
dn_ht_scan(s->siht, dn_c_copy_q, a);
else if (s->siht)
dn_c_copy_q(s->siht, a);
return 0;
}
int
dn_c_copy_fs(struct dn_fsk *f, struct copy_args *a, int nq)
{
struct dn_flow_set *fs = (struct dn_flow_set *)*a->start;
fs->next.sle_next = (struct dn_flow_set *)DN_IS_QUEUE;
fs->fs_nr = f->fs.fs_nr;
fs->qsize = f->fs.qsize;
fs->plr = f->fs.plr;
fs->w_q = f->fs.w_q;
fs->max_th = f->max_th;
fs->min_th = f->min_th;
fs->max_p = f->fs.max_p;
fs->flow_mask = f->fs.flow_mask;
fs->rq_elements = nq;
fs->rq_size = (f->fs.buckets ? f->fs.buckets : 1);
fs->parent_nr = f->fs.sched_nr;
fs->weight = f->fs.par[0];
fs->flags_fs = convertflags2old(f->fs.flags);
*a->start += sizeof(struct dn_flow_set);
return 0;
}
int
dn_compat_copy_queue(struct copy_args *a, void *_o)
{
int have = a->end - *a->start;
int need = 0;
int fs_size = sizeof(struct dn_flow_set);
int queue_size = sizeof(struct dn_flow_queue8);
struct dn_fsk *fs = (struct dn_fsk *)_o;
int n_queue = 0; /* number of queues */
n_queue = (fs->fs.flags & DN_HAVE_MASK ? dn_ht_entries(fs->qht) :
(fs->qht ? 1 : 0));
need = fs_size + queue_size * n_queue;
if (have < need) {
D("have < need");
return 1;
}
/* copy flowset */
dn_c_copy_fs(fs, a, n_queue);
/* copy queues */
if (fs->fs.flags & DN_HAVE_MASK)
dn_ht_scan(fs->qht, dn_c_copy_q, a);
else if (fs->qht)
dn_c_copy_q(fs->qht, a);
return 0;
}
int
copy_data_helper_compat(void *_o, void *_arg)
{
struct copy_args *a = _arg;
if (a->type == DN_COMPAT_PIPE) {
struct dn_schk *s = _o;
if (s->sch.oid.subtype != 1 || s->sch.sched_nr <= DN_MAX_ID) {
return 0; /* not old type */
}
/* copy pipe parameters, and if instance exists, copy
* other parameters and eventually queues.
*/
if(dn_compat_copy_pipe(a, _o))
return DNHT_SCAN_END;
} else if (a->type == DN_COMPAT_QUEUE) {
struct dn_fsk *fs = _o;
if (fs->fs.fs_nr >= DN_MAX_ID)
return 0;
if (dn_compat_copy_queue(a, _o))
return DNHT_SCAN_END;
}
return 0;
}
/* Main function to manage old requests */
int
ip_dummynet_compat(struct sockopt *sopt)
{
int error=0;
void *v = NULL;
struct dn_id oid;
/* Lenght of data, used to found ipfw version... */
int len = sopt->sopt_valsize;
/* len can be 0 if command was dummynet_flush */
if (len == pipesize7) {
D("setting compatibility with FreeBSD 7.2");
is7 = 1;
}
else if (len == pipesize8 || len == pipesizemax8) {
D("setting compatibility with FreeBSD 8");
is7 = 0;
}
switch (sopt->sopt_name) {
default:
printf("dummynet: -- unknown option %d", sopt->sopt_name);
error = EINVAL;
break;
case IP_DUMMYNET_FLUSH:
oid_fill(&oid, sizeof(oid), DN_CMD_FLUSH, DN_API_VERSION);
do_config(&oid, oid.len);
break;
case IP_DUMMYNET_DEL:
v = malloc(len, M_TEMP, M_WAITOK);
error = sooptcopyin(sopt, v, len, len);
if (error)
break;
error = dn_compat_del(v);
free(v, M_DUMMYNET);
break;
case IP_DUMMYNET_CONFIGURE:
v = malloc(len, M_TEMP, M_WAITOK);
error = sooptcopyin(sopt, v, len, len);
if (error)
break;
error = dn_compat_configure(v);
free(v, M_DUMMYNET);
break;
case IP_DUMMYNET_GET: {
void *buf;
int ret;
int original_size = sopt->sopt_valsize;
int size;
ret = dummynet_get(sopt, &buf);
if (ret)
return 0;//XXX ?
size = sopt->sopt_valsize;
sopt->sopt_valsize = original_size;
D("size=%d, buf=%p", size, buf);
ret = sooptcopyout(sopt, buf, size);
if (ret)
printf(" %s ERROR sooptcopyout\n", __FUNCTION__);
if (buf)
free(buf, M_DUMMYNET);
}
}
return error;
}
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