/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
- * Copyright (c) 1998 Luigi Rizzo
+ * Copyright (c) 1998-2002 Luigi Rizzo, Universita` di Pisa
+ * Portions Copyright (c) 2000 Akamba Corp.
+ * All rights reserved
*
- * Redistribution and use in source forms, with and without modification,
- * are permitted provided that this entire comment appears intact.
+ * 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.
*
- * Redistribution in binary form may occur without any restrictions.
- * Obviously, it would be nice if you gave credit where credit is due
- * but requiring it would be too onerous.
- *
- * This software is provided ``AS IS'' without any warranties of any kind.
+ * 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: src/sys/netinet/ip_dummynet.c,v 1.84 2004/08/25 09:31:30 pjd Exp $
*/
+#define DUMMYNET_DEBUG
+
/*
* This module implements IP dummynet, a bandwidth limiter/delay emulator
- * used in conjunction with the ipfw package.
+ * Description of the data structures used is in ip_dummynet.h
+ * Here you mainly find the following blocks of code:
+ * + variable declarations;
+ * + heap management functions;
+ * + scheduler and dummynet functions;
+ * + configuration and initialization.
*
- * Changes:
+ * NOTA BENE: critical sections are protected by the "dummynet lock".
*
- * 980821: changed conventions in the queueing logic
- * packets passed from dummynet to ip_in/out are prepended with
- * a vestigial mbuf type MT_DUMMYNET which contains a pointer
- * to the matching rule.
- * ip_input/output will extract the parameters, free the vestigial mbuf,
- * and do the processing.
- *
- * 980519: fixed behaviour when deleting rules.
- * 980518: added splimp()/splx() to protect against races
+ * Most important Changes:
+ *
+ * 010124: Fixed WF2Q behaviour
+ * 010122: Fixed spl protection.
+ * 000601: WF2Q support
+ * 000106: large rewrite, use heaps to handle very many pipes.
* 980513: initial release
+ *
+ * include files marked with XXX are probably not needed
*/
-/* include files marked with XXX are probably not needed */
-
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
-#include <sys/queue.h> /* XXX */
+#include <sys/queue.h> /* XXX */
#include <sys/kernel.h>
+#include <sys/random.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
+#include <net/kpi_protocol.h>
+#if DUMMYNET
+#include <net/kpi_protocol.h>
+#endif /* DUMMYNET */
+#include <net/nwk_wq.h>
+#include <net/pfvar.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
-#include <netinet/ip_fw.h>
#include <netinet/ip_dummynet.h>
#include <netinet/ip_var.h>
-#if BRIDGE
-#include <netinet/if_ether.h> /* for struct arpcom */
-#include <net/bridge.h>
-#endif
+#include <netinet/ip6.h> /* for ip6_input, ip6_output prototypes */
+#include <netinet6/ip6_var.h>
+
+/*
+ * We keep a private variable for the simulation time, but we could
+ * probably use an existing one ("softticks" in sys/kern/kern_timer.c)
+ */
+static dn_key curr_time = 0; /* current simulation time */
+
+/* this is for the timer that fires to call dummynet() - we only enable the timer when
+ * there are packets to process, otherwise it's disabled */
+static int timer_enabled = 0;
+
+static int dn_hash_size = 64; /* default hash size */
+
+/* statistics on number of queue searches and search steps */
+static int searches, search_steps;
+static int pipe_expire = 1; /* expire queue if empty */
+static int dn_max_ratio = 16; /* max queues/buckets ratio */
+
+static int red_lookup_depth = 256; /* RED - default lookup table depth */
+static int red_avg_pkt_size = 512; /* RED - default medium packet size */
+static int red_max_pkt_size = 1500; /* RED - default max packet size */
+
+static int serialize = 0;
+
+/*
+ * Three heaps contain queues and pipes that the scheduler handles:
+ *
+ * ready_heap contains all dn_flow_queue related to fixed-rate pipes.
+ *
+ * wfq_ready_heap contains the pipes associated with WF2Q flows
+ *
+ * extract_heap contains pipes associated with delay lines.
+ *
+ */
+static struct dn_heap ready_heap, extract_heap, wfq_ready_heap;
+
+static int heap_init(struct dn_heap *h, int size);
+static int heap_insert(struct dn_heap *h, dn_key key1, void *p);
+static void heap_extract(struct dn_heap *h, void *obj);
+
+
+static void transmit_event(struct dn_pipe *pipe, struct mbuf **head,
+ struct mbuf **tail);
+static void ready_event(struct dn_flow_queue *q, struct mbuf **head,
+ struct mbuf **tail);
+static void ready_event_wfq(struct dn_pipe *p, struct mbuf **head,
+ struct mbuf **tail);
+
+/*
+ * Packets are retrieved from queues in Dummynet in chains instead of
+ * packet-by-packet. The entire list of packets is first dequeued and
+ * sent out by the following function.
+ */
+static void dummynet_send(struct mbuf *m);
+
+#define HASHSIZE 16
+#define HASH(num) ((((num) >> 8) ^ ((num) >> 4) ^ (num)) & 0x0f)
+static struct dn_pipe_head pipehash[HASHSIZE]; /* all pipes */
+static struct dn_flow_set_head flowsethash[HASHSIZE]; /* all flowsets */
-static struct dn_pipe *all_pipes = NULL ; /* list of all pipes */
+#ifdef SYSCTL_NODE
+SYSCTL_NODE(_net_inet_ip, OID_AUTO, dummynet,
+ CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Dummynet");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, hash_size,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &dn_hash_size, 0, "Default hash table size");
+SYSCTL_QUAD(_net_inet_ip_dummynet, OID_AUTO, curr_time,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &curr_time, "Current tick");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, ready_heap,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &ready_heap.size, 0, "Size of ready heap");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, extract_heap,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &extract_heap.size, 0, "Size of extract heap");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, searches,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &searches, 0, "Number of queue searches");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, search_steps,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &search_steps, 0, "Number of queue search steps");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, expire,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &pipe_expire, 0, "Expire queue if empty");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, max_chain_len,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &dn_max_ratio, 0,
+ "Max ratio between dynamic queues and buckets");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, red_lookup_depth,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &red_lookup_depth, 0, "Depth of RED lookup table");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, red_avg_pkt_size,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &red_avg_pkt_size, 0, "RED Medium packet size");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, red_max_pkt_size,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &red_max_pkt_size, 0, "RED Max packet size");
+#endif
-static int dn_debug = 0 ; /* verbose */
-static int dn_calls = 0 ; /* number of calls */
-static int dn_idle = 1;
+#ifdef DUMMYNET_DEBUG
+int dummynet_debug = 0;
#ifdef SYSCTL_NODE
-SYSCTL_NODE(_net_inet_ip, OID_AUTO, dummynet, CTLFLAG_RW, 0, "Dummynet");
-SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, debug, CTLFLAG_RW, &dn_debug, 0, "");
-SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, calls, CTLFLAG_RD, &dn_calls, 0, "");
-SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, idle, CTLFLAG_RD, &dn_idle, 0, "");
+SYSCTL_INT(_net_inet_ip_dummynet, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_LOCKED, &dummynet_debug,
+ 0, "control debugging printfs");
#endif
+#define DPRINTF(X) if (dummynet_debug) printf X
+#else
+#define DPRINTF(X)
+#endif
+
+/* dummynet lock */
+static lck_grp_t *dn_mutex_grp;
+static lck_grp_attr_t *dn_mutex_grp_attr;
+static lck_attr_t *dn_mutex_attr;
+decl_lck_mtx_data(static, dn_mutex_data);
+static lck_mtx_t *dn_mutex = &dn_mutex_data;
+static int config_pipe(struct dn_pipe *p);
static int ip_dn_ctl(struct sockopt *sopt);
-static void rt_unref(struct rtentry *);
static void dummynet(void *);
-static void dn_restart(void);
-static void dn_move(struct dn_pipe *pipe, int immediate);
static void dummynet_flush(void);
+void dummynet_drain(void);
+static ip_dn_io_t dummynet_io;
-/*
- * the following is needed when deleting a pipe, because rules can
- * hold references to the pipe.
- */
-extern LIST_HEAD (ip_fw_head, ip_fw_chain) ip_fw_chain;
+static void cp_flow_set_to_64_user(struct dn_flow_set *set, struct dn_flow_set_64 *fs_bp);
+static void cp_queue_to_64_user( struct dn_flow_queue *q, struct dn_flow_queue_64 *qp);
+static char *cp_pipe_to_64_user(struct dn_pipe *p, struct dn_pipe_64 *pipe_bp);
+static char* dn_copy_set_64(struct dn_flow_set *set, char *bp);
+static int cp_pipe_from_user_64( struct sockopt *sopt, struct dn_pipe *p );
+
+static void cp_flow_set_to_32_user(struct dn_flow_set *set, struct dn_flow_set_32 *fs_bp);
+static void cp_queue_to_32_user( struct dn_flow_queue *q, struct dn_flow_queue_32 *qp);
+static char *cp_pipe_to_32_user(struct dn_pipe *p, struct dn_pipe_32 *pipe_bp);
+static char* dn_copy_set_32(struct dn_flow_set *set, char *bp);
+static int cp_pipe_from_user_32( struct sockopt *sopt, struct dn_pipe *p );
+
+struct eventhandler_lists_ctxt dummynet_evhdlr_ctxt;
+
+uint32_t
+my_random(void)
+{
+ uint32_t val;
+ read_frandom(&val, sizeof(val));
+ val &= 0x7FFFFFFF;
+
+ return val;
+}
/*
- * invoked to reschedule the periodic task if necessary.
- * Should only be called when dn_idle = 1 ;
+ * Heap management functions.
+ *
+ * In the heap, first node is element 0. Children of i are 2i+1 and 2i+2.
+ * Some macros help finding parent/children so we can optimize them.
+ *
+ * heap_init() is called to expand the heap when needed.
+ * Increment size in blocks of 16 entries.
+ * XXX failure to allocate a new element is a pretty bad failure
+ * as we basically stall a whole queue forever!!
+ * Returns 1 on error, 0 on success
*/
-static void
-dn_restart()
+#define HEAP_FATHER(x) ( ( (x) - 1 ) / 2 )
+#define HEAP_LEFT(x) ( 2*(x) + 1 )
+#define HEAP_IS_LEFT(x) ( (x) & 1 )
+#define HEAP_RIGHT(x) ( 2*(x) + 2 )
+#define HEAP_SWAP(a, b, buffer) { buffer = a ; a = b ; b = buffer ; }
+#define HEAP_INCREMENT 15
+
+
+int
+cp_pipe_from_user_32( struct sockopt *sopt, struct dn_pipe *p )
{
- struct dn_pipe *pipe;
+ struct dn_pipe_32 user_pipe_32;
+ int error = 0;
- if (!dn_idle)
- return;
-
- for (pipe = all_pipes ; pipe ; pipe = pipe->next ) {
- /* if there any pipe that needs work, restart */
- if (pipe->r.head || pipe->p.head || pipe->numbytes < 0 ) {
- dn_idle = 0;
- timeout(dummynet, NULL, 1);
- return ;
+ error = sooptcopyin(sopt, &user_pipe_32, sizeof(struct dn_pipe_32), sizeof(struct dn_pipe_32));
+ if (!error) {
+ p->pipe_nr = user_pipe_32.pipe_nr;
+ p->bandwidth = user_pipe_32.bandwidth;
+ p->delay = user_pipe_32.delay;
+ p->V = user_pipe_32.V;
+ p->sum = user_pipe_32.sum;
+ p->numbytes = user_pipe_32.numbytes;
+ p->sched_time = user_pipe_32.sched_time;
+ bcopy( user_pipe_32.if_name, p->if_name, IFNAMSIZ);
+ p->ready = user_pipe_32.ready;
+
+ p->fs.fs_nr = user_pipe_32.fs.fs_nr;
+ p->fs.flags_fs = user_pipe_32.fs.flags_fs;
+ p->fs.parent_nr = user_pipe_32.fs.parent_nr;
+ p->fs.weight = user_pipe_32.fs.weight;
+ p->fs.qsize = user_pipe_32.fs.qsize;
+ p->fs.plr = user_pipe_32.fs.plr;
+ p->fs.flow_mask = user_pipe_32.fs.flow_mask;
+ p->fs.rq_size = user_pipe_32.fs.rq_size;
+ p->fs.rq_elements = user_pipe_32.fs.rq_elements;
+ p->fs.last_expired = user_pipe_32.fs.last_expired;
+ p->fs.backlogged = user_pipe_32.fs.backlogged;
+ p->fs.w_q = user_pipe_32.fs.w_q;
+ p->fs.max_th = user_pipe_32.fs.max_th;
+ p->fs.min_th = user_pipe_32.fs.min_th;
+ p->fs.max_p = user_pipe_32.fs.max_p;
+ p->fs.c_1 = user_pipe_32.fs.c_1;
+ p->fs.c_2 = user_pipe_32.fs.c_2;
+ p->fs.c_3 = user_pipe_32.fs.c_3;
+ p->fs.c_4 = user_pipe_32.fs.c_4;
+ p->fs.lookup_depth = user_pipe_32.fs.lookup_depth;
+ p->fs.lookup_step = user_pipe_32.fs.lookup_step;
+ p->fs.lookup_weight = user_pipe_32.fs.lookup_weight;
+ p->fs.avg_pkt_size = user_pipe_32.fs.avg_pkt_size;
+ p->fs.max_pkt_size = user_pipe_32.fs.max_pkt_size;
+ }
+ return error;
+}
+
+
+int
+cp_pipe_from_user_64( struct sockopt *sopt, struct dn_pipe *p )
+{
+ struct dn_pipe_64 user_pipe_64;
+ int error = 0;
+
+ error = sooptcopyin(sopt, &user_pipe_64, sizeof(struct dn_pipe_64), sizeof(struct dn_pipe_64));
+ if (!error) {
+ p->pipe_nr = user_pipe_64.pipe_nr;
+ p->bandwidth = user_pipe_64.bandwidth;
+ p->delay = user_pipe_64.delay;
+ p->V = user_pipe_64.V;
+ p->sum = user_pipe_64.sum;
+ p->numbytes = user_pipe_64.numbytes;
+ p->sched_time = user_pipe_64.sched_time;
+ bcopy( user_pipe_64.if_name, p->if_name, IFNAMSIZ);
+ p->ready = user_pipe_64.ready;
+
+ p->fs.fs_nr = user_pipe_64.fs.fs_nr;
+ p->fs.flags_fs = user_pipe_64.fs.flags_fs;
+ p->fs.parent_nr = user_pipe_64.fs.parent_nr;
+ p->fs.weight = user_pipe_64.fs.weight;
+ p->fs.qsize = user_pipe_64.fs.qsize;
+ p->fs.plr = user_pipe_64.fs.plr;
+ p->fs.flow_mask = user_pipe_64.fs.flow_mask;
+ p->fs.rq_size = user_pipe_64.fs.rq_size;
+ p->fs.rq_elements = user_pipe_64.fs.rq_elements;
+ p->fs.last_expired = user_pipe_64.fs.last_expired;
+ p->fs.backlogged = user_pipe_64.fs.backlogged;
+ p->fs.w_q = user_pipe_64.fs.w_q;
+ p->fs.max_th = user_pipe_64.fs.max_th;
+ p->fs.min_th = user_pipe_64.fs.min_th;
+ p->fs.max_p = user_pipe_64.fs.max_p;
+ p->fs.c_1 = user_pipe_64.fs.c_1;
+ p->fs.c_2 = user_pipe_64.fs.c_2;
+ p->fs.c_3 = user_pipe_64.fs.c_3;
+ p->fs.c_4 = user_pipe_64.fs.c_4;
+ p->fs.lookup_depth = user_pipe_64.fs.lookup_depth;
+ p->fs.lookup_step = user_pipe_64.fs.lookup_step;
+ p->fs.lookup_weight = user_pipe_64.fs.lookup_weight;
+ p->fs.avg_pkt_size = user_pipe_64.fs.avg_pkt_size;
+ p->fs.max_pkt_size = user_pipe_64.fs.max_pkt_size;
}
- }
+ return error;
}
static void
-rt_unref(struct rtentry *rt)
+cp_flow_set_to_32_user(struct dn_flow_set *set, struct dn_flow_set_32 *fs_bp)
{
- if (rt == NULL)
- return ;
- if (rt->rt_refcnt <= 0)
- printf("-- warning, refcnt now %d, decreasing\n", rt->rt_refcnt);
- RTFREE(rt);
+ fs_bp->fs_nr = set->fs_nr;
+ fs_bp->flags_fs = set->flags_fs;
+ fs_bp->parent_nr = set->parent_nr;
+ fs_bp->weight = set->weight;
+ fs_bp->qsize = set->qsize;
+ fs_bp->plr = set->plr;
+ fs_bp->flow_mask = set->flow_mask;
+ fs_bp->rq_size = set->rq_size;
+ fs_bp->rq_elements = set->rq_elements;
+ fs_bp->last_expired = set->last_expired;
+ fs_bp->backlogged = set->backlogged;
+ fs_bp->w_q = set->w_q;
+ fs_bp->max_th = set->max_th;
+ fs_bp->min_th = set->min_th;
+ fs_bp->max_p = set->max_p;
+ fs_bp->c_1 = set->c_1;
+ fs_bp->c_2 = set->c_2;
+ fs_bp->c_3 = set->c_3;
+ fs_bp->c_4 = set->c_4;
+ fs_bp->w_q_lookup = CAST_DOWN_EXPLICIT(user32_addr_t, set->w_q_lookup);
+ fs_bp->lookup_depth = set->lookup_depth;
+ fs_bp->lookup_step = set->lookup_step;
+ fs_bp->lookup_weight = set->lookup_weight;
+ fs_bp->avg_pkt_size = set->avg_pkt_size;
+ fs_bp->max_pkt_size = set->max_pkt_size;
}
-/*
- * move packets from R-queue to P-queue
- */
static void
-dn_move(struct dn_pipe *pipe, int immediate)
-{
- struct dn_pkt *pkt;
-
- /*
- * consistency check, should catch new pipes which are
- * not initialized properly.
- */
- if ( pipe->p.head == NULL &&
- pipe->ticks_from_last_insert != pipe->delay) {
- printf("Warning, empty pipe and delay %d (should be %d)\n",
- pipe->ticks_from_last_insert, pipe->delay);
- pipe->ticks_from_last_insert = pipe->delay;
- }
- /* this ought to go in dn_dequeue() */
- if (!immediate && pipe->ticks_from_last_insert < pipe->delay)
- pipe->ticks_from_last_insert++;
- if ( pkt = pipe->r.head ) {
- /*
- * Move at most numbytes bytes from src and move to dst.
- * delay is set to ticks_from_last_insert, which
- * is reset after the first insertion;
- */
- while ( pkt ) {
- struct ip *ip=mtod(pkt->dn_m, struct ip *);
-
- /*
- * queue limitation: pass packets down if the len is
- * such that the pkt would go out before the next tick.
- */
- if (pipe->bandwidth) {
- if (pipe->numbytes < ip->ip_len)
- break;
- pipe->numbytes -= ip->ip_len;
- }
- pipe->r_len--; /* elements in queue */
- pipe->r_len_bytes -= ip->ip_len ;
-
- /*
- * to add delay jitter, must act here. A lower value
- * (bounded to 0) means lower delay.
- */
- pkt->delay = pipe->ticks_from_last_insert;
- pipe->ticks_from_last_insert = 0;
- /* compensate the decrement done next in dn_dequeue */
- if (!immediate && pkt->delay >0 && pipe->p.head==NULL)
- pkt->delay++;
- if (pipe->p.head == NULL)
- pipe->p.head = pkt;
- else
- (struct dn_pkt *)pipe->p.tail->dn_next = pkt;
- pipe->p.tail = pkt;
- pkt = (struct dn_pkt *)pkt->dn_next;
- pipe->p.tail->dn_next = NULL;
- }
- pipe->r.head = pkt;
-
- /*** XXX just a sanity check */
- if ( ( pkt == NULL && pipe->r_len != 0) ||
- ( pkt != NULL && pipe->r_len == 0) )
- printf("-- Warning, pipe head %p len %d\n",
- (void *)pkt, pipe->r_len);
- }
-
- /*
- * deliver packets downstream after the delay in the P-queue.
- */
-
- if (pipe->p.head == NULL)
- return;
- if (!immediate)
- pipe->p.head->delay--;
- while ( (pkt = pipe->p.head) && pkt->delay < 1) {
+cp_flow_set_to_64_user(struct dn_flow_set *set, struct dn_flow_set_64 *fs_bp)
+{
+ fs_bp->fs_nr = set->fs_nr;
+ fs_bp->flags_fs = set->flags_fs;
+ fs_bp->parent_nr = set->parent_nr;
+ fs_bp->weight = set->weight;
+ fs_bp->qsize = set->qsize;
+ fs_bp->plr = set->plr;
+ fs_bp->flow_mask = set->flow_mask;
+ fs_bp->rq_size = set->rq_size;
+ fs_bp->rq_elements = set->rq_elements;
+ fs_bp->last_expired = set->last_expired;
+ fs_bp->backlogged = set->backlogged;
+ fs_bp->w_q = set->w_q;
+ fs_bp->max_th = set->max_th;
+ fs_bp->min_th = set->min_th;
+ fs_bp->max_p = set->max_p;
+ fs_bp->c_1 = set->c_1;
+ fs_bp->c_2 = set->c_2;
+ fs_bp->c_3 = set->c_3;
+ fs_bp->c_4 = set->c_4;
+ fs_bp->w_q_lookup = CAST_DOWN(user64_addr_t, set->w_q_lookup);
+ fs_bp->lookup_depth = set->lookup_depth;
+ fs_bp->lookup_step = set->lookup_step;
+ fs_bp->lookup_weight = set->lookup_weight;
+ fs_bp->avg_pkt_size = set->avg_pkt_size;
+ fs_bp->max_pkt_size = set->max_pkt_size;
+}
+
+static
+void
+cp_queue_to_32_user( struct dn_flow_queue *q, struct dn_flow_queue_32 *qp)
+{
+ qp->id = q->id;
+ qp->len = q->len;
+ qp->len_bytes = q->len_bytes;
+ qp->numbytes = q->numbytes;
+ qp->tot_pkts = q->tot_pkts;
+ qp->tot_bytes = q->tot_bytes;
+ qp->drops = q->drops;
+ qp->hash_slot = q->hash_slot;
+ qp->avg = q->avg;
+ qp->count = q->count;
+ qp->random = q->random;
+ qp->q_time = q->q_time;
+ qp->heap_pos = q->heap_pos;
+ qp->sched_time = q->sched_time;
+ qp->S = q->S;
+ qp->F = q->F;
+}
+
+static
+void
+cp_queue_to_64_user( struct dn_flow_queue *q, struct dn_flow_queue_64 *qp)
+{
+ qp->id = q->id;
+ qp->len = q->len;
+ qp->len_bytes = q->len_bytes;
+ qp->numbytes = q->numbytes;
+ qp->tot_pkts = q->tot_pkts;
+ qp->tot_bytes = q->tot_bytes;
+ qp->drops = q->drops;
+ qp->hash_slot = q->hash_slot;
+ qp->avg = q->avg;
+ qp->count = q->count;
+ qp->random = q->random;
+ qp->q_time = q->q_time;
+ qp->heap_pos = q->heap_pos;
+ qp->sched_time = q->sched_time;
+ qp->S = q->S;
+ qp->F = q->F;
+}
+
+static
+char *
+cp_pipe_to_32_user(struct dn_pipe *p, struct dn_pipe_32 *pipe_bp)
+{
+ char *bp;
+
+ pipe_bp->pipe_nr = p->pipe_nr;
+ pipe_bp->bandwidth = p->bandwidth;
+ pipe_bp->delay = p->delay;
+ bcopy( &(p->scheduler_heap), &(pipe_bp->scheduler_heap), sizeof(struct dn_heap_32));
+ pipe_bp->scheduler_heap.p = CAST_DOWN_EXPLICIT(user32_addr_t, pipe_bp->scheduler_heap.p);
+ bcopy( &(p->not_eligible_heap), &(pipe_bp->not_eligible_heap), sizeof(struct dn_heap_32));
+ pipe_bp->not_eligible_heap.p = CAST_DOWN_EXPLICIT(user32_addr_t, pipe_bp->not_eligible_heap.p);
+ bcopy( &(p->idle_heap), &(pipe_bp->idle_heap), sizeof(struct dn_heap_32));
+ pipe_bp->idle_heap.p = CAST_DOWN_EXPLICIT(user32_addr_t, pipe_bp->idle_heap.p);
+ pipe_bp->V = p->V;
+ pipe_bp->sum = p->sum;
+ pipe_bp->numbytes = p->numbytes;
+ pipe_bp->sched_time = p->sched_time;
+ bcopy( p->if_name, pipe_bp->if_name, IFNAMSIZ);
+ pipe_bp->ifp = CAST_DOWN_EXPLICIT(user32_addr_t, p->ifp);
+ pipe_bp->ready = p->ready;
+
+ cp_flow_set_to_32_user( &(p->fs), &(pipe_bp->fs));
+
+ pipe_bp->delay = (pipe_bp->delay * 1000) / (hz * 10);
/*
- * first unlink, then call procedures since ip_input()
- * can result in a call to ip_output cnd viceversa,
- * thus causing nested calls
+ * XXX the following is a hack based on ->next being the
+ * first field in dn_pipe and dn_flow_set. The correct
+ * solution would be to move the dn_flow_set to the beginning
+ * of struct dn_pipe.
*/
- pipe->p.head = (struct dn_pkt *) pkt->dn_next ;
+ pipe_bp->next = CAST_DOWN_EXPLICIT( user32_addr_t, DN_IS_PIPE );
+ /* clean pointers */
+ pipe_bp->head = pipe_bp->tail = (user32_addr_t) 0;
+ pipe_bp->fs.next = (user32_addr_t)0;
+ pipe_bp->fs.pipe = (user32_addr_t)0;
+ pipe_bp->fs.rq = (user32_addr_t)0;
+ bp = ((char *)pipe_bp) + sizeof(struct dn_pipe_32);
+ return dn_copy_set_32( &(p->fs), bp);
+}
+
+static
+char *
+cp_pipe_to_64_user(struct dn_pipe *p, struct dn_pipe_64 *pipe_bp)
+{
+ char *bp;
+
+ pipe_bp->pipe_nr = p->pipe_nr;
+ pipe_bp->bandwidth = p->bandwidth;
+ pipe_bp->delay = p->delay;
+ bcopy( &(p->scheduler_heap), &(pipe_bp->scheduler_heap), sizeof(struct dn_heap_64));
+ pipe_bp->scheduler_heap.p = CAST_DOWN(user64_addr_t, pipe_bp->scheduler_heap.p);
+ bcopy( &(p->not_eligible_heap), &(pipe_bp->not_eligible_heap), sizeof(struct dn_heap_64));
+ pipe_bp->not_eligible_heap.p = CAST_DOWN(user64_addr_t, pipe_bp->not_eligible_heap.p);
+ bcopy( &(p->idle_heap), &(pipe_bp->idle_heap), sizeof(struct dn_heap_64));
+ pipe_bp->idle_heap.p = CAST_DOWN(user64_addr_t, pipe_bp->idle_heap.p);
+ pipe_bp->V = p->V;
+ pipe_bp->sum = p->sum;
+ pipe_bp->numbytes = p->numbytes;
+ pipe_bp->sched_time = p->sched_time;
+ bcopy( p->if_name, pipe_bp->if_name, IFNAMSIZ);
+ pipe_bp->ifp = CAST_DOWN(user64_addr_t, p->ifp);
+ pipe_bp->ready = p->ready;
+ cp_flow_set_to_64_user( &(p->fs), &(pipe_bp->fs));
+
+ pipe_bp->delay = (pipe_bp->delay * 1000) / (hz * 10);
/*
- * the trick to avoid flow-id settings here is to prepend a
- * vestigial mbuf to the packet, with the following values:
- * m_type = MT_DUMMYNET
- * m_next = the actual mbuf to be processed by ip_input/output
- * m_data = the matching rule
- * The vestigial element is the same memory area used by
- * the dn_pkt, and IS FREED IN ip_input/ip_output. IT IS
- * NOT A REAL MBUF, just a block of memory acquired with malloc().
+ * XXX the following is a hack based on ->next being the
+ * first field in dn_pipe and dn_flow_set. The correct
+ * solution would be to move the dn_flow_set to the beginning
+ * of struct dn_pipe.
*/
- switch (pkt->dn_dir) {
- case DN_TO_IP_OUT: {
- struct rtentry *tmp_rt = pkt->ro.ro_rt ;
-
- (void)ip_output((struct mbuf *)pkt, (struct mbuf *)pkt->ifp,
- &(pkt->ro), pkt->dn_hlen, NULL);
- rt_unref (tmp_rt) ;
- }
- break ;
- case DN_TO_IP_IN :
- ip_input((struct mbuf *)pkt) ;
- break ;
-#if BRIDGE
- case DN_TO_BDG_FWD :
- bdg_forward((struct mbuf **)&pkt, pkt->ifp);
- break ;
-#endif
- default:
- printf("dummynet: bad switch %d!\n", pkt->dn_dir);
- m_freem(pkt->dn_m);
- FREE(pkt, M_IPFW);
- break ;
+ pipe_bp->next = CAST_DOWN( user64_addr_t, DN_IS_PIPE );
+ /* clean pointers */
+ pipe_bp->head = pipe_bp->tail = USER_ADDR_NULL;
+ pipe_bp->fs.next = USER_ADDR_NULL;
+ pipe_bp->fs.pipe = USER_ADDR_NULL;
+ pipe_bp->fs.rq = USER_ADDR_NULL;
+ bp = ((char *)pipe_bp) + sizeof(struct dn_pipe_64);
+ return dn_copy_set_64( &(p->fs), bp);
+}
+
+static int
+heap_init(struct dn_heap *h, int new_size)
+{
+ struct dn_heap_entry *p;
+
+ if (h->size >= new_size) {
+ printf("dummynet: heap_init, Bogus call, have %d want %d\n",
+ h->size, new_size);
+ return 0;
}
- }
+ new_size = (new_size + HEAP_INCREMENT) & ~HEAP_INCREMENT;
+ p = _MALLOC(new_size * sizeof(*p), M_DUMMYNET, M_DONTWAIT );
+ if (p == NULL) {
+ printf("dummynet: heap_init, resize %d failed\n", new_size );
+ return 1; /* error */
+ }
+ if (h->size > 0) {
+ bcopy(h->p, p, h->size * sizeof(*p));
+ FREE(h->p, M_DUMMYNET);
+ }
+ h->p = p;
+ h->size = new_size;
+ return 0;
}
+
/*
- * this is the periodic task that moves packets between the R-
- * and the P- queue
+ * Insert element in heap. Normally, p != NULL, we insert p in
+ * a new position and bubble up. If p == NULL, then the element is
+ * already in place, and key is the position where to start the
+ * bubble-up.
+ * Returns 1 on failure (cannot allocate new heap entry)
+ *
+ * If offset > 0 the position (index, int) of the element in the heap is
+ * also stored in the element itself at the given offset in bytes.
*/
-/*ARGSUSED*/
-void
-dummynet(void * __unused unused)
+#define SET_OFFSET(heap, node) \
+ if (heap->offset > 0) \
+ *((int *)((char *)(heap->p[node].object) + heap->offset)) = node ;
+/*
+ * RESET_OFFSET is used for sanity checks. It sets offset to an invalid value.
+ */
+#define RESET_OFFSET(heap, node) \
+ if (heap->offset > 0) \
+ *((int *)((char *)(heap->p[node].object) + heap->offset)) = -1 ;
+static int
+heap_insert(struct dn_heap *h, dn_key key1, void *p)
{
- struct dn_pipe *p ;
- int s ;
- boolean_t funnel_state;
+ int son = h->elements;
- funnel_state = thread_funnel_set(network_flock, TRUE);
- dn_calls++ ;
- for (p = all_pipes ; p ; p = p->next ) {
- /*
- * Increment the amount of data that can be sent. However,
- * don't do that if the channel is idle
- * (r.head == NULL && numbytes >= bandwidth).
- * This bug fix is from tim shepard (shep@bbn.com)
- */
- s = splimp();
- if (p->r.head != NULL || p->numbytes < p->bandwidth )
- p->numbytes += p->bandwidth ;
- dn_move(p, 0); /* is it really 0 (also below) ? */
- splx(s);
- }
-
- /*
- * finally, if some queue has data, restart the timer.
- */
- dn_idle = 1;
- dn_restart();
- (void) thread_funnel_set(network_flock, funnel_state);
+ if (p == NULL) { /* data already there, set starting point */
+ son = key1;
+ } else { /* insert new element at the end, possibly resize */
+ son = h->elements;
+ if (son == h->size) { /* need resize... */
+ if (heap_init(h, h->elements + 1)) {
+ return 1; /* failure... */
+ }
+ }
+ h->p[son].object = p;
+ h->p[son].key = key1;
+ h->elements++;
+ }
+ while (son > 0) { /* bubble up */
+ int father = HEAP_FATHER(son);
+ struct dn_heap_entry tmp;
+ if (DN_KEY_LT( h->p[father].key, h->p[son].key )) {
+ break; /* found right position */
+ }
+ /* son smaller than father, swap and repeat */
+ HEAP_SWAP(h->p[son], h->p[father], tmp);
+ SET_OFFSET(h, son);
+ son = father;
+ }
+ SET_OFFSET(h, son);
+ return 0;
}
/*
- * dummynet hook for packets.
- * input and output use the same code, so i use bit 16 in the pipe
- * number to chose the direction: 1 for output packets, 0 for input.
- * for input, only m is significant. For output, also the others.
+ * remove top element from heap, or obj if obj != NULL
*/
-int
-dummynet_io(int pipe_nr, int dir,
- struct mbuf *m, struct ifnet *ifp, struct route *ro, int hlen,
- struct ip_fw_chain *rule)
-{
- struct dn_pkt *pkt;
- struct dn_pipe *pipe;
- struct ip *ip=mtod(m, struct ip *);
-
- int s=splimp();
-
- pipe_nr &= 0xffff ;
- /*
- * locate pipe. First time is expensive, next have direct access.
- */
-
- if ( (pipe = rule->rule->pipe_ptr) == NULL ) {
- for (pipe=all_pipes; pipe && pipe->pipe_nr !=pipe_nr; pipe=pipe->next)
- ;
- if (pipe == NULL) {
- splx(s);
- if (dn_debug)
- printf("warning, pkt for no pipe %d\n", pipe_nr);
- m_freem(m);
- return 0 ;
- } else
- rule->rule->pipe_ptr = pipe ;
- }
-
- /*
- * should i drop ?
- * This section implements random packet drop.
- */
- if ( (pipe->plr && random() < pipe->plr) ||
- (pipe->queue_size && pipe->r_len >= pipe->queue_size) ||
- (pipe->queue_size_bytes &&
- ip->ip_len + pipe->r_len_bytes > pipe->queue_size_bytes) ||
- (pkt = (struct dn_pkt *) _MALLOC(sizeof (*pkt),
- M_IPFW, M_WAITOK) ) == NULL ) {
- splx(s);
- if (dn_debug)
- printf("-- dummynet: drop from pipe %d, have %d pks, %d bytes\n",
- pipe_nr, pipe->r_len, pipe->r_len_bytes);
- pipe->r_drops++ ;
- m_freem(m);
- return 0 ; /* XXX error */
- }
- bzero(pkt, sizeof(*pkt) );
- /* build and enqueue packet */
- pkt->hdr.mh_type = MT_DUMMYNET ;
- (struct ip_fw_chain *)pkt->hdr.mh_data = rule ;
- pkt->dn_next = NULL;
- pkt->dn_m = m;
- pkt->dn_dir = dir ;
- pkt->delay = 0;
-
- pkt->ifp = ifp;
- if (dir == DN_TO_IP_OUT) {
- pkt->ro = *ro; /* XXX copied! */
- if (ro->ro_rt)
- ro->ro_rt->rt_refcnt++ ; /* XXX */
- }
- pkt->dn_hlen = hlen;
- if (pipe->r.head == NULL)
- pipe->r.head = pkt;
- else
- (struct dn_pkt *)pipe->r.tail->dn_next = pkt;
- pipe->r.tail = pkt;
- pipe->r_len++;
- pipe->r_len_bytes += ip->ip_len ;
-
- /*
- * here we could implement RED if we like to
- */
-
- if (pipe->r.head == pkt) { /* process immediately */
- dn_move(pipe, 1);
- }
- splx(s);
- if (dn_idle)
- dn_restart();
- return 0;
-}
-
-/*
- * dispose all packets queued on a pipe
+static void
+heap_extract(struct dn_heap *h, void *obj)
+{
+ int child, father, maxelt = h->elements - 1;
+
+ if (maxelt < 0) {
+ printf("dummynet: warning, extract from empty heap 0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(h));
+ return;
+ }
+ father = 0; /* default: move up smallest child */
+ if (obj != NULL) { /* extract specific element, index is at offset */
+ if (h->offset <= 0) {
+ panic("dummynet: heap_extract from middle not supported on this heap!!!\n");
+ }
+ father = *((int *)((char *)obj + h->offset));
+ if (father < 0 || father >= h->elements) {
+ printf("dummynet: heap_extract, father %d out of bound 0..%d\n",
+ father, h->elements);
+ panic("dummynet: heap_extract");
+ }
+ }
+ RESET_OFFSET(h, father);
+ child = HEAP_LEFT(father); /* left child */
+ while (child <= maxelt) { /* valid entry */
+ if (child != maxelt && DN_KEY_LT(h->p[child + 1].key, h->p[child].key)) {
+ child = child + 1; /* take right child, otherwise left */
+ }
+ h->p[father] = h->p[child];
+ SET_OFFSET(h, father);
+ father = child;
+ child = HEAP_LEFT(child); /* left child for next loop */
+ }
+ h->elements--;
+ if (father != maxelt) {
+ /*
+ * Fill hole with last entry and bubble up, reusing the insert code
+ */
+ h->p[father] = h->p[maxelt];
+ heap_insert(h, father, NULL); /* this one cannot fail */
+ }
+}
+
+/*
+ * heapify() will reorganize data inside an array to maintain the
+ * heap property. It is needed when we delete a bunch of entries.
*/
static void
-purge_pipe(struct dn_pipe *pipe)
+heapify(struct dn_heap *h)
+{
+ int i;
+
+ for (i = 0; i < h->elements; i++) {
+ heap_insert(h, i, NULL);
+ }
+}
+
+/*
+ * cleanup the heap and free data structure
+ */
+static void
+heap_free(struct dn_heap *h)
+{
+ if (h->size > 0) {
+ FREE(h->p, M_DUMMYNET);
+ }
+ bzero(h, sizeof(*h));
+}
+
+/*
+ * --- end of heap management functions ---
+ */
+
+/*
+ * Return the mbuf tag holding the dummynet state. As an optimization
+ * this is assumed to be the first tag on the list. If this turns out
+ * wrong we'll need to search the list.
+ */
+static struct dn_pkt_tag *
+dn_tag_get(struct mbuf *m)
{
- struct dn_pkt *pkt, *n ;
- struct rtentry *tmp_rt ;
+ struct m_tag *mtag = m_tag_first(m);
+
+ if (!(mtag != NULL &&
+ mtag->m_tag_id == KERNEL_MODULE_TAG_ID &&
+ mtag->m_tag_type == KERNEL_TAG_TYPE_DUMMYNET)) {
+ panic("packet on dummynet queue w/o dummynet tag: 0x%llx",
+ (uint64_t)VM_KERNEL_ADDRPERM(m));
+ }
- for (pkt = pipe->r.head ; pkt ; ) {
- rt_unref (tmp_rt = pkt->ro.ro_rt ) ;
- m_freem(pkt->dn_m);
- n = pkt ;
- pkt = (struct dn_pkt *)pkt->dn_next ;
- FREE(n, M_IPFW) ;
- }
- for (pkt = pipe->p.head ; pkt ; ) {
- rt_unref (tmp_rt = pkt->ro.ro_rt ) ;
- m_freem(pkt->dn_m);
- n = pkt ;
- pkt = (struct dn_pkt *)pkt->dn_next ;
- FREE(n, M_IPFW) ;
- }
+ return (struct dn_pkt_tag *)(mtag + 1);
}
/*
- * delete all pipes returning memory
+ * Scheduler functions:
+ *
+ * transmit_event() is called when the delay-line needs to enter
+ * the scheduler, either because of existing pkts getting ready,
+ * or new packets entering the queue. The event handled is the delivery
+ * time of the packet.
+ *
+ * ready_event() does something similar with fixed-rate queues, and the
+ * event handled is the finish time of the head pkt.
+ *
+ * wfq_ready_event() does something similar with WF2Q queues, and the
+ * event handled is the start time of the head pkt.
+ *
+ * In all cases, we make sure that the data structures are consistent
+ * before passing pkts out, because this might trigger recursive
+ * invocations of the procedures.
*/
static void
-dummynet_flush()
+transmit_event(struct dn_pipe *pipe, struct mbuf **head, struct mbuf **tail)
{
- struct dn_pipe *q, *p = all_pipes ;
- int s = splnet() ;
+ struct mbuf *m;
+ struct dn_pkt_tag *pkt = NULL;
+ u_int64_t schedule_time;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
+ ASSERT(serialize >= 0);
+ if (serialize == 0) {
+ while ((m = pipe->head) != NULL) {
+ pkt = dn_tag_get(m);
+ if (!DN_KEY_LEQ(pkt->dn_output_time, curr_time)) {
+ break;
+ }
+
+ pipe->head = m->m_nextpkt;
+ if (*tail != NULL) {
+ (*tail)->m_nextpkt = m;
+ } else {
+ *head = m;
+ }
+ *tail = m;
+ }
- all_pipes = NULL ;
- splx(s) ;
- /*
- * purge all queued pkts and delete all pipes
- */
- for ( ; p ; ) {
- purge_pipe(p);
- q = p ;
- p = p->next ;
- FREE(q, M_IPFW);
- }
+ if (*tail != NULL) {
+ (*tail)->m_nextpkt = NULL;
+ }
+ }
+
+ schedule_time = pkt == NULL || DN_KEY_LEQ(pkt->dn_output_time, curr_time) ?
+ curr_time + 1 : pkt->dn_output_time;
+
+ /* if there are leftover packets, put the pipe into the heap for next ready event */
+ if ((m = pipe->head) != NULL) {
+ pkt = dn_tag_get(m);
+ /* XXX should check errors on heap_insert, by draining the
+ * whole pipe p and hoping in the future we are more successful
+ */
+ heap_insert(&extract_heap, schedule_time, pipe);
+ }
}
-extern struct ip_fw_chain *ip_fw_default_rule ;
/*
- * when a firewall rule is deleted, scan all pipes and remove the flow-id
- * from packets matching this rule.
+ * the following macro computes how many ticks we have to wait
+ * before being able to transmit a packet. The credit is taken from
+ * either a pipe (WF2Q) or a flow_queue (per-flow queueing)
*/
-void
-dn_rule_delete(void *r)
+
+/* hz is 100, which gives a granularity of 10ms in the old timer.
+ * The timer has been changed to fire every 1ms, so the use of
+ * hz has been modified here. All instances of hz have been left
+ * in place but adjusted by a factor of 10 so that hz is functionally
+ * equal to 1000.
+ */
+#define SET_TICKS(_m, q, p) \
+ ((_m)->m_pkthdr.len*8*(hz*10) - (q)->numbytes + p->bandwidth - 1 ) / \
+ p->bandwidth ;
+
+/*
+ * extract pkt from queue, compute output time (could be now)
+ * and put into delay line (p_queue)
+ */
+static void
+move_pkt(struct mbuf *pkt, struct dn_flow_queue *q,
+ struct dn_pipe *p, int len)
{
- struct dn_pipe *p ;
- int matches = 0 ;
+ struct dn_pkt_tag *dt = dn_tag_get(pkt);
+
+ q->head = pkt->m_nextpkt;
+ q->len--;
+ q->len_bytes -= len;
- for ( p = all_pipes ; p ; p = p->next ) {
- struct dn_pkt *x ;
- for (x = p->r.head ; x ; x = (struct dn_pkt *)x->dn_next )
- if (x->hdr.mh_data == r) {
- matches++ ;
- x->hdr.mh_data = (void *)ip_fw_default_rule ;
- }
- for (x = p->p.head ; x ; x = (struct dn_pkt *)x->dn_next )
- if (x->hdr.mh_data == r) {
- matches++ ;
- x->hdr.mh_data = (void *)ip_fw_default_rule ;
- }
- }
- printf("dn_rule_delete, r %p, default %p%s, %d matches\n",
- (void *)r, (void *)ip_fw_default_rule,
- r == ip_fw_default_rule ? " AARGH!":"", matches);
+ dt->dn_output_time = curr_time + p->delay;
+
+ if (p->head == NULL) {
+ p->head = pkt;
+ } else {
+ p->tail->m_nextpkt = pkt;
+ }
+ p->tail = pkt;
+ p->tail->m_nextpkt = NULL;
}
/*
- * handler for the various dummynet socket options
- * (get, flush, config, del)
+ * ready_event() is invoked every time the queue must enter the
+ * scheduler, either because the first packet arrives, or because
+ * a previously scheduled event fired.
+ * On invokation, drain as many pkts as possible (could be 0) and then
+ * if there are leftover packets reinsert the pkt in the scheduler.
*/
-static int
-ip_dn_ctl(struct sockopt *sopt)
+static void
+ready_event(struct dn_flow_queue *q, struct mbuf **head, struct mbuf **tail)
{
- int error = 0 ;
- size_t size ;
- char *buf, *bp ;
- struct dn_pipe *p, tmp_pipe ;
+ struct mbuf *pkt;
+ struct dn_pipe *p = q->fs->pipe;
+ int p_was_empty;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
- struct dn_pipe *x, *a, *b ;
+ if (p == NULL) {
+ printf("dummynet: ready_event pipe is gone\n");
+ return;
+ }
+ p_was_empty = (p->head == NULL);
+
+ /*
+ * schedule fixed-rate queues linked to this pipe:
+ * Account for the bw accumulated since last scheduling, then
+ * drain as many pkts as allowed by q->numbytes and move to
+ * the delay line (in p) computing output time.
+ * bandwidth==0 (no limit) means we can drain the whole queue,
+ * setting len_scaled = 0 does the job.
+ */
+ q->numbytes += (curr_time - q->sched_time) * p->bandwidth;
+ while ((pkt = q->head) != NULL) {
+ int len = pkt->m_pkthdr.len;
+ int len_scaled = p->bandwidth ? len * 8 * (hz * 10) : 0;
+ if (len_scaled > q->numbytes) {
+ break;
+ }
+ q->numbytes -= len_scaled;
+ move_pkt(pkt, q, p, len);
+ }
+ /*
+ * If we have more packets queued, schedule next ready event
+ * (can only occur when bandwidth != 0, otherwise we would have
+ * flushed the whole queue in the previous loop).
+ * To this purpose we record the current time and compute how many
+ * ticks to go for the finish time of the packet.
+ */
+ if ((pkt = q->head) != NULL) { /* this implies bandwidth != 0 */
+ dn_key t = SET_TICKS(pkt, q, p); /* ticks i have to wait */
+ q->sched_time = curr_time;
+ heap_insert(&ready_heap, curr_time + t, (void *)q );
+ /* XXX should check errors on heap_insert, and drain the whole
+ * queue on error hoping next time we are luckier.
+ */
+ } else { /* RED needs to know when the queue becomes empty */
+ q->q_time = curr_time;
+ q->numbytes = 0;
+ }
+ /*
+ * If the delay line was empty call transmit_event(p) now.
+ * Otherwise, the scheduler will take care of it.
+ */
+ if (p_was_empty) {
+ transmit_event(p, head, tail);
+ }
+}
- /* Disallow sets in really-really secure mode. */
- if (sopt->sopt_dir == SOPT_SET && securelevel >= 3)
- return (EPERM);
+/*
+ * Called when we can transmit packets on WF2Q queues. Take pkts out of
+ * the queues at their start time, and enqueue into the delay line.
+ * Packets are drained until p->numbytes < 0. As long as
+ * len_scaled >= p->numbytes, the packet goes into the delay line
+ * with a deadline p->delay. For the last packet, if p->numbytes<0,
+ * there is an additional delay.
+ */
+static void
+ready_event_wfq(struct dn_pipe *p, struct mbuf **head, struct mbuf **tail)
+{
+ int p_was_empty = (p->head == NULL);
+ struct dn_heap *sch = &(p->scheduler_heap);
+ struct dn_heap *neh = &(p->not_eligible_heap);
+ int64_t p_numbytes = p->numbytes;
- switch (sopt->sopt_name) {
- default :
- panic("ip_dn_ctl -- unknown option");
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
- case IP_DUMMYNET_GET :
- for (p = all_pipes, size = 0 ; p ; p = p->next )
- size += sizeof( *p ) ;
- buf = _MALLOC(size, M_TEMP, M_WAITOK);
- if (buf == 0) {
- error = ENOBUFS ;
- break ;
+ if (p->if_name[0] == 0) { /* tx clock is simulated */
+ p_numbytes += (curr_time - p->sched_time) * p->bandwidth;
+ } else { /* tx clock is for real, the ifq must be empty or this is a NOP */
+ if (p->ifp && !IFCQ_IS_EMPTY(&p->ifp->if_snd)) {
+ return;
+ } else {
+ DPRINTF(("dummynet: pipe %d ready from %s --\n",
+ p->pipe_nr, p->if_name));
+ }
}
- for (p = all_pipes, bp = buf ; p ; p = p->next ) {
- struct dn_pipe *q = (struct dn_pipe *)bp ;
- bcopy(p, bp, sizeof( *p ) );
+ /*
+ * While we have backlogged traffic AND credit, we need to do
+ * something on the queue.
+ */
+ while (p_numbytes >= 0 && (sch->elements > 0 || neh->elements > 0)) {
+ if (sch->elements > 0) { /* have some eligible pkts to send out */
+ struct dn_flow_queue *q = sch->p[0].object;
+ struct mbuf *pkt = q->head;
+ struct dn_flow_set *fs = q->fs;
+ u_int64_t len = pkt->m_pkthdr.len;
+ int len_scaled = p->bandwidth ? len * 8 * (hz * 10) : 0;
+
+ heap_extract(sch, NULL); /* remove queue from heap */
+ p_numbytes -= len_scaled;
+ move_pkt(pkt, q, p, len);
+
+ p->V += (len << MY_M) / p->sum; /* update V */
+ q->S = q->F; /* update start time */
+ if (q->len == 0) { /* Flow not backlogged any more */
+ fs->backlogged--;
+ heap_insert(&(p->idle_heap), q->F, q);
+ } else { /* still backlogged */
+ /*
+ * update F and position in backlogged queue, then
+ * put flow in not_eligible_heap (we will fix this later).
+ */
+ len = (q->head)->m_pkthdr.len;
+ q->F += (len << MY_M) / (u_int64_t) fs->weight;
+ if (DN_KEY_LEQ(q->S, p->V)) {
+ heap_insert(neh, q->S, q);
+ } else {
+ heap_insert(sch, q->F, q);
+ }
+ }
+ }
/*
- * return bw and delay in bits/s and ms, respectively
+ * now compute V = max(V, min(S_i)). Remember that all elements in sch
+ * have by definition S_i <= V so if sch is not empty, V is surely
+ * the max and we must not update it. Conversely, if sch is empty
+ * we only need to look at neh.
*/
- q->bandwidth *= (8*hz) ;
- q->delay = (q->delay * 1000) / hz ;
- bp += sizeof( *p ) ;
+ if (sch->elements == 0 && neh->elements > 0) {
+ p->V = MAX64( p->V, neh->p[0].key );
+ }
+ /* move from neh to sch any packets that have become eligible */
+ while (neh->elements > 0 && DN_KEY_LEQ(neh->p[0].key, p->V)) {
+ struct dn_flow_queue *q = neh->p[0].object;
+ heap_extract(neh, NULL);
+ heap_insert(sch, q->F, q);
+ }
+
+ if (p->if_name[0] != '\0') {/* tx clock is from a real thing */
+ p_numbytes = -1; /* mark not ready for I/O */
+ break;
+ }
}
- error = sooptcopyout(sopt, buf, size);
- FREE(buf, M_TEMP);
- break ;
- case IP_DUMMYNET_FLUSH :
- dummynet_flush() ;
- break ;
- case IP_DUMMYNET_CONFIGURE :
- p = &tmp_pipe ;
- error = sooptcopyin(sopt, p, sizeof *p, sizeof *p);
- if (error)
- break ;
- /*
- * The config program passes parameters as follows:
- * bandwidth = bits/second (0 = no limits);
- * must be translated in bytes/tick.
- * delay = ms
- * must be translated in ticks.
- * queue_size = slots (0 = no limit)
- * queue_size_bytes = bytes (0 = no limit)
- * only one can be set, must be bound-checked
- */
- if ( p->bandwidth > 0 ) {
- p->bandwidth = p->bandwidth / 8 / hz ;
- if (p->bandwidth == 0) /* too little does not make sense! */
- p->bandwidth = 10 ;
- }
- p->delay = ( p->delay * hz ) / 1000 ;
- if (p->queue_size == 0 && p->queue_size_bytes == 0)
- p->queue_size = 100 ;
- if (p->queue_size != 0 ) /* buffers are prevailing */
- p->queue_size_bytes = 0 ;
- if (p->queue_size > 100)
- p->queue_size = 100 ;
- if (p->queue_size_bytes > 1024*1024)
- p->queue_size_bytes = 1024*1024 ;
-#if 0
- printf("ip_dn: config pipe %d %d bit/s %d ms %d bufs\n",
- p->pipe_nr,
- p->bandwidth * 8 * hz ,
- p->delay * 1000 / hz , p->queue_size);
-#endif
- for (a = NULL , b = all_pipes ; b && b->pipe_nr < p->pipe_nr ;
- a = b , b = b->next) ;
- if (b && b->pipe_nr == p->pipe_nr) {
- /* XXX should spl and flush old pipe... */
- b->bandwidth = p->bandwidth ;
- b->delay = p->delay ;
- b->ticks_from_last_insert = p->delay ;
- b->queue_size = p->queue_size ;
- b->queue_size_bytes = p->queue_size_bytes ;
- b->plr = p->plr ;
- } else {
- int s ;
- x = _MALLOC(sizeof(struct dn_pipe), M_IPFW, M_NOWAIT) ;
- if (x == NULL) {
- printf("ip_dummynet.c: sorry no memory\n");
- error = ENOSPC ;
- break ;
- }
- bzero(x, sizeof(*x) );
- x->bandwidth = p->bandwidth ;
- x->delay = p->delay ;
- x->ticks_from_last_insert = p->delay ;
- x->pipe_nr = p->pipe_nr ;
- x->queue_size = p->queue_size ;
- x->queue_size_bytes = p->queue_size_bytes ;
- x->plr = p->plr ;
-
- s = splnet() ;
- x->next = b ;
- if (a == NULL)
- all_pipes = x ;
- else
- a->next = x ;
- splx(s);
- }
- break ;
-
- case IP_DUMMYNET_DEL :
- p = &tmp_pipe ;
- error = sooptcopyin(sopt, p, sizeof *p, sizeof *p);
- if (error)
- break ;
-
- for (a = NULL , b = all_pipes ; b && b->pipe_nr < p->pipe_nr ;
- a = b , b = b->next) ;
- if (b && b->pipe_nr == p->pipe_nr) { /* found pipe */
- int s = splnet() ;
- struct ip_fw_chain *chain = ip_fw_chain.lh_first;
-
- if (a == NULL)
- all_pipes = b->next ;
- else
- a->next = b->next ;
+ if (sch->elements == 0 && neh->elements == 0 && p_numbytes >= 0
+ && p->idle_heap.elements > 0) {
/*
- * remove references to this pipe from the ip_fw rules.
+ * no traffic and no events scheduled. We can get rid of idle-heap.
*/
- for (; chain; chain = chain->chain.le_next) {
- register struct ip_fw *const f = chain->rule;
- if (f->pipe_ptr == b)
- f->pipe_ptr = NULL ;
+ int i;
+
+ for (i = 0; i < p->idle_heap.elements; i++) {
+ struct dn_flow_queue *q = p->idle_heap.p[i].object;
+
+ q->F = 0;
+ q->S = q->F + 1;
+ }
+ p->sum = 0;
+ p->V = 0;
+ p->idle_heap.elements = 0;
+ }
+ /*
+ * If we are getting clocks from dummynet (not a real interface) and
+ * If we are under credit, schedule the next ready event.
+ * Also fix the delivery time of the last packet.
+ */
+ if (p->if_name[0] == 0 && p_numbytes < 0) { /* this implies bandwidth >0 */
+ dn_key t = 0; /* number of ticks i have to wait */
+
+ if (p->bandwidth > 0) {
+ t = (p->bandwidth - 1 - p_numbytes) / p->bandwidth;
}
- splx(s);
- purge_pipe(b); /* remove pkts from here */
- FREE(b, M_IPFW);
- }
- break ;
+ dn_tag_get(p->tail)->dn_output_time += t;
+ p->sched_time = curr_time;
+ heap_insert(&wfq_ready_heap, curr_time + t, (void *)p);
+ /* XXX should check errors on heap_insert, and drain the whole
+ * queue on error hoping next time we are luckier.
+ */
+ }
+
+ /* Fit (adjust if necessary) 64bit result into 32bit variable. */
+ if (p_numbytes > INT_MAX) {
+ p->numbytes = INT_MAX;
+ } else if (p_numbytes < INT_MIN) {
+ p->numbytes = INT_MIN;
+ } else {
+ p->numbytes = p_numbytes;
+ }
+
+ /*
+ * If the delay line was empty call transmit_event(p) now.
+ * Otherwise, the scheduler will take care of it.
+ */
+ if (p_was_empty) {
+ transmit_event(p, head, tail);
}
- return error ;
}
-void
-ip_dn_init(void)
+/*
+ * This is called every 1ms. It is used to
+ * increment the current tick counter and schedule expired events.
+ */
+static void
+dummynet(__unused void * unused)
{
- printf("DUMMYNET initialized (980901) -- size dn_pkt %d\n",
- sizeof(struct dn_pkt));
- all_pipes = NULL ;
- ip_dn_ctl_ptr = ip_dn_ctl;
-}
+ void *p; /* generic parameter to handler */
+ struct dn_heap *h;
+ struct dn_heap *heaps[3];
+ struct mbuf *head = NULL, *tail = NULL;
+ int i;
+ struct dn_pipe *pe;
+ struct timespec ts;
+ struct timeval tv;
+
+ heaps[0] = &ready_heap; /* fixed-rate queues */
+ heaps[1] = &wfq_ready_heap; /* wfq queues */
+ heaps[2] = &extract_heap; /* delay line */
-#if DUMMYNET_MODULE
+ lck_mtx_lock(dn_mutex);
-#include <sys/exec.h>
-#include <sys/sysent.h>
-#include <sys/lkm.h>
+ /* make all time measurements in milliseconds (ms) -
+ * here we convert secs and usecs to msecs (just divide the
+ * usecs and take the closest whole number).
+ */
+ microuptime(&tv);
+ curr_time = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
-MOD_MISC(dummynet);
+ for (i = 0; i < 3; i++) {
+ h = heaps[i];
+ while (h->elements > 0 && DN_KEY_LEQ(h->p[0].key, curr_time)) {
+ if (h->p[0].key > curr_time) {
+ printf("dummynet: warning, heap %d is %d ticks late\n",
+ i, (int)(curr_time - h->p[0].key));
+ }
+ p = h->p[0].object; /* store a copy before heap_extract */
+ heap_extract(h, NULL); /* need to extract before processing */
+ if (i == 0) {
+ ready_event(p, &head, &tail);
+ } else if (i == 1) {
+ struct dn_pipe *pipe = p;
+ if (pipe->if_name[0] != '\0') {
+ printf("dummynet: bad ready_event_wfq for pipe %s\n",
+ pipe->if_name);
+ } else {
+ ready_event_wfq(p, &head, &tail);
+ }
+ } else {
+ transmit_event(p, &head, &tail);
+ }
+ }
+ }
+ /* sweep pipes trying to expire idle flow_queues */
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(pe, &pipehash[i], next) {
+ if (pe->idle_heap.elements > 0 &&
+ DN_KEY_LT(pe->idle_heap.p[0].key, pe->V)) {
+ struct dn_flow_queue *q = pe->idle_heap.p[0].object;
-static ip_dn_ctl_t *old_dn_ctl_ptr ;
+ heap_extract(&(pe->idle_heap), NULL);
+ q->S = q->F + 1; /* mark timestamp as invalid */
+ pe->sum -= q->fs->weight;
+ }
+ }
+ }
-static int
-dummynet_load(struct lkm_table *lkmtp, int cmd)
+ /* check the heaps to see if there's still stuff in there, and
+ * only set the timer if there are packets to process
+ */
+ timer_enabled = 0;
+ for (i = 0; i < 3; i++) {
+ h = heaps[i];
+ if (h->elements > 0) { // set the timer
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1 * 1000000; // 1ms
+ timer_enabled = 1;
+ bsd_timeout(dummynet, NULL, &ts);
+ break;
+ }
+ }
+
+ if (head != NULL) {
+ serialize++;
+ }
+
+ lck_mtx_unlock(dn_mutex);
+
+ /* Send out the de-queued list of ready-to-send packets */
+ if (head != NULL) {
+ dummynet_send(head);
+ lck_mtx_lock(dn_mutex);
+ serialize--;
+ lck_mtx_unlock(dn_mutex);
+ }
+}
+
+
+static void
+dummynet_send(struct mbuf *m)
{
- int s=splnet();
- old_dn_ctl_ptr = ip_dn_ctl_ptr;
- ip_dn_init();
- splx(s);
- return 0;
+ struct dn_pkt_tag *pkt;
+ struct mbuf *n;
+
+ for (; m != NULL; m = n) {
+ n = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ pkt = dn_tag_get(m);
+
+ DPRINTF(("dummynet_send m: 0x%llx dn_dir: %d dn_flags: 0x%x\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(m), pkt->dn_dir,
+ pkt->dn_flags));
+
+ switch (pkt->dn_dir) {
+ case DN_TO_IP_OUT: {
+ struct route tmp_rt;
+
+ /* route is already in the packet's dn_ro */
+ bzero(&tmp_rt, sizeof(tmp_rt));
+
+ /* Force IP_RAWOUTPUT as the IP header is fully formed */
+ pkt->dn_flags |= IP_RAWOUTPUT | IP_FORWARDING;
+ (void)ip_output(m, NULL, &tmp_rt, pkt->dn_flags, NULL, NULL);
+ ROUTE_RELEASE(&tmp_rt);
+ break;
+ }
+ case DN_TO_IP_IN:
+ proto_inject(PF_INET, m);
+ break;
+ case DN_TO_IP6_OUT: {
+ /* routes already in the packet's dn_{ro6,pmtu} */
+ ip6_output(m, NULL, NULL, IPV6_FORWARDING, NULL, NULL, NULL);
+ break;
+ }
+ case DN_TO_IP6_IN:
+ proto_inject(PF_INET6, m);
+ break;
+ default:
+ printf("dummynet: bad switch %d!\n", pkt->dn_dir);
+ m_freem(m);
+ break;
+ }
+ }
}
+/*
+ * Unconditionally expire empty queues in case of shortage.
+ * Returns the number of queues freed.
+ */
static int
-dummynet_unload(struct lkm_table *lkmtp, int cmd)
+expire_queues(struct dn_flow_set *fs)
{
- int s=splnet();
- ip_dn_ctl_ptr = old_dn_ctl_ptr;
- splx(s);
- dummynet_flush();
- printf("DUMMYNET unloaded\n");
- return 0;
-}
+ struct dn_flow_queue *q, *prev;
+ int i, initial_elements = fs->rq_elements;
+ struct timeval timenow;
-int
-dummynet_mod(struct lkm_table *lkmtp, int cmd, int ver)
+ /* reviewed for getmicrotime usage */
+ getmicrotime(&timenow);
+
+ if (fs->last_expired == timenow.tv_sec) {
+ return 0;
+ }
+ fs->last_expired = timenow.tv_sec;
+ for (i = 0; i <= fs->rq_size; i++) { /* last one is overflow */
+ for (prev = NULL, q = fs->rq[i]; q != NULL;) {
+ if (q->head != NULL || q->S != q->F + 1) {
+ prev = q;
+ q = q->next;
+ } else { /* entry is idle, expire it */
+ struct dn_flow_queue *old_q = q;
+
+ if (prev != NULL) {
+ prev->next = q = q->next;
+ } else {
+ fs->rq[i] = q = q->next;
+ }
+ fs->rq_elements--;
+ FREE(old_q, M_DUMMYNET);
+ }
+ }
+ }
+ return initial_elements - fs->rq_elements;
+}
+
+/*
+ * If room, create a new queue and put at head of slot i;
+ * otherwise, create or use the default queue.
+ */
+static struct dn_flow_queue *
+create_queue(struct dn_flow_set *fs, int i)
+{
+ struct dn_flow_queue *q;
+
+ if (fs->rq_elements > fs->rq_size * dn_max_ratio &&
+ expire_queues(fs) == 0) {
+ /*
+ * No way to get room, use or create overflow queue.
+ */
+ i = fs->rq_size;
+ if (fs->rq[i] != NULL) {
+ return fs->rq[i];
+ }
+ }
+ q = _MALLOC(sizeof(*q), M_DUMMYNET, M_DONTWAIT | M_ZERO);
+ if (q == NULL) {
+ printf("dummynet: sorry, cannot allocate queue for new flow\n");
+ return NULL;
+ }
+ q->fs = fs;
+ q->hash_slot = i;
+ q->next = fs->rq[i];
+ q->S = q->F + 1; /* hack - mark timestamp as invalid */
+ fs->rq[i] = q;
+ fs->rq_elements++;
+ return q;
+}
+
+/*
+ * Given a flow_set and a pkt in last_pkt, find a matching queue
+ * after appropriate masking. The queue is moved to front
+ * so that further searches take less time.
+ */
+static struct dn_flow_queue *
+find_queue(struct dn_flow_set *fs, struct ip_flow_id *id)
+{
+ int i = 0; /* we need i and q for new allocations */
+ struct dn_flow_queue *q, *prev;
+ int is_v6 = IS_IP6_FLOW_ID(id);
+
+ if (!(fs->flags_fs & DN_HAVE_FLOW_MASK)) {
+ q = fs->rq[0];
+ } else {
+ /* first, do the masking, then hash */
+ id->dst_port &= fs->flow_mask.dst_port;
+ id->src_port &= fs->flow_mask.src_port;
+ id->proto &= fs->flow_mask.proto;
+ id->flags = 0; /* we don't care about this one */
+ if (is_v6) {
+ APPLY_MASK(&id->dst_ip6, &fs->flow_mask.dst_ip6);
+ APPLY_MASK(&id->src_ip6, &fs->flow_mask.src_ip6);
+ id->flow_id6 &= fs->flow_mask.flow_id6;
+
+ i = ((id->dst_ip6.__u6_addr.__u6_addr32[0]) & 0xffff) ^
+ ((id->dst_ip6.__u6_addr.__u6_addr32[1]) & 0xffff) ^
+ ((id->dst_ip6.__u6_addr.__u6_addr32[2]) & 0xffff) ^
+ ((id->dst_ip6.__u6_addr.__u6_addr32[3]) & 0xffff) ^
+
+ ((id->dst_ip6.__u6_addr.__u6_addr32[0] >> 15) & 0xffff) ^
+ ((id->dst_ip6.__u6_addr.__u6_addr32[1] >> 15) & 0xffff) ^
+ ((id->dst_ip6.__u6_addr.__u6_addr32[2] >> 15) & 0xffff) ^
+ ((id->dst_ip6.__u6_addr.__u6_addr32[3] >> 15) & 0xffff) ^
+
+ ((id->src_ip6.__u6_addr.__u6_addr32[0] << 1) & 0xfffff) ^
+ ((id->src_ip6.__u6_addr.__u6_addr32[1] << 1) & 0xfffff) ^
+ ((id->src_ip6.__u6_addr.__u6_addr32[2] << 1) & 0xfffff) ^
+ ((id->src_ip6.__u6_addr.__u6_addr32[3] << 1) & 0xfffff) ^
+
+ ((id->src_ip6.__u6_addr.__u6_addr32[0] >> 16) & 0xffff) ^
+ ((id->src_ip6.__u6_addr.__u6_addr32[1] >> 16) & 0xffff) ^
+ ((id->src_ip6.__u6_addr.__u6_addr32[2] >> 16) & 0xffff) ^
+ ((id->src_ip6.__u6_addr.__u6_addr32[3] >> 16) & 0xffff) ^
+
+ (id->dst_port << 1) ^ (id->src_port) ^
+ (id->proto) ^
+ (id->flow_id6);
+ } else {
+ id->dst_ip &= fs->flow_mask.dst_ip;
+ id->src_ip &= fs->flow_mask.src_ip;
+
+ i = ((id->dst_ip) & 0xffff) ^
+ ((id->dst_ip >> 15) & 0xffff) ^
+ ((id->src_ip << 1) & 0xffff) ^
+ ((id->src_ip >> 16) & 0xffff) ^
+ (id->dst_port << 1) ^ (id->src_port) ^
+ (id->proto);
+ }
+ i = i % fs->rq_size;
+ /* finally, scan the current list for a match */
+ searches++;
+ for (prev = NULL, q = fs->rq[i]; q;) {
+ search_steps++;
+ if (is_v6 &&
+ IN6_ARE_ADDR_EQUAL(&id->dst_ip6, &q->id.dst_ip6) &&
+ IN6_ARE_ADDR_EQUAL(&id->src_ip6, &q->id.src_ip6) &&
+ id->dst_port == q->id.dst_port &&
+ id->src_port == q->id.src_port &&
+ id->proto == q->id.proto &&
+ id->flags == q->id.flags &&
+ id->flow_id6 == q->id.flow_id6) {
+ break; /* found */
+ }
+ if (!is_v6 && id->dst_ip == q->id.dst_ip &&
+ id->src_ip == q->id.src_ip &&
+ id->dst_port == q->id.dst_port &&
+ id->src_port == q->id.src_port &&
+ id->proto == q->id.proto &&
+ id->flags == q->id.flags) {
+ break; /* found */
+ }
+ /* No match. Check if we can expire the entry */
+ if (pipe_expire && q->head == NULL && q->S == q->F + 1) {
+ /* entry is idle and not in any heap, expire it */
+ struct dn_flow_queue *old_q = q;
+
+ if (prev != NULL) {
+ prev->next = q = q->next;
+ } else {
+ fs->rq[i] = q = q->next;
+ }
+ fs->rq_elements--;
+ FREE(old_q, M_DUMMYNET);
+ continue;
+ }
+ prev = q;
+ q = q->next;
+ }
+ if (q && prev != NULL) { /* found and not in front */
+ prev->next = q->next;
+ q->next = fs->rq[i];
+ fs->rq[i] = q;
+ }
+ }
+ if (q == NULL) { /* no match, need to allocate a new entry */
+ q = create_queue(fs, i);
+ if (q != NULL) {
+ q->id = *id;
+ }
+ }
+ return q;
+}
+
+static int
+red_drops(struct dn_flow_set *fs, struct dn_flow_queue *q, int len)
+{
+ /*
+ * RED algorithm
+ *
+ * RED calculates the average queue size (avg) using a low-pass filter
+ * with an exponential weighted (w_q) moving average:
+ * avg <- (1-w_q) * avg + w_q * q_size
+ * where q_size is the queue length (measured in bytes or * packets).
+ *
+ * If q_size == 0, we compute the idle time for the link, and set
+ * avg = (1 - w_q)^(idle/s)
+ * where s is the time needed for transmitting a medium-sized packet.
+ *
+ * Now, if avg < min_th the packet is enqueued.
+ * If avg > max_th the packet is dropped. Otherwise, the packet is
+ * dropped with probability P function of avg.
+ *
+ */
+
+ int64_t p_b = 0;
+ /* queue in bytes or packets ? */
+ u_int q_size = (fs->flags_fs & DN_QSIZE_IS_BYTES) ? q->len_bytes : q->len;
+
+ DPRINTF(("\ndummynet: %d q: %2u ", (int) curr_time, q_size));
+
+ /* average queue size estimation */
+ if (q_size != 0) {
+ /*
+ * queue is not empty, avg <- avg + (q_size - avg) * w_q
+ */
+ int diff = SCALE(q_size) - q->avg;
+ int64_t v = SCALE_MUL((int64_t) diff, (int64_t) fs->w_q);
+
+ q->avg += (int) v;
+ } else {
+ /*
+ * queue is empty, find for how long the queue has been
+ * empty and use a lookup table for computing
+ * (1 - * w_q)^(idle_time/s) where s is the time to send a
+ * (small) packet.
+ * XXX check wraps...
+ */
+ if (q->avg) {
+ u_int t = (curr_time - q->q_time) / fs->lookup_step;
+
+ q->avg = (t < fs->lookup_depth) ?
+ SCALE_MUL(q->avg, fs->w_q_lookup[t]) : 0;
+ }
+ }
+ DPRINTF(("dummynet: avg: %u ", SCALE_VAL(q->avg)));
+
+ /* should i drop ? */
+
+ if (q->avg < fs->min_th) {
+ q->count = -1;
+ return 0; /* accept packet ; */
+ }
+ if (q->avg >= fs->max_th) { /* average queue >= max threshold */
+ if (fs->flags_fs & DN_IS_GENTLE_RED) {
+ /*
+ * According to Gentle-RED, if avg is greater than max_th the
+ * packet is dropped with a probability
+ * p_b = c_3 * avg - c_4
+ * where c_3 = (1 - max_p) / max_th, and c_4 = 1 - 2 * max_p
+ */
+ p_b = SCALE_MUL((int64_t) fs->c_3, (int64_t) q->avg) - fs->c_4;
+ } else {
+ q->count = -1;
+ DPRINTF(("dummynet: - drop"));
+ return 1;
+ }
+ } else if (q->avg > fs->min_th) {
+ /*
+ * we compute p_b using the linear dropping function p_b = c_1 *
+ * avg - c_2, where c_1 = max_p / (max_th - min_th), and c_2 =
+ * max_p * min_th / (max_th - min_th)
+ */
+ p_b = SCALE_MUL((int64_t) fs->c_1, (int64_t) q->avg) - fs->c_2;
+ }
+ if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
+ p_b = (p_b * len) / fs->max_pkt_size;
+ }
+ if (++q->count == 0) {
+ q->random = (my_random() & 0xffff);
+ } else {
+ /*
+ * q->count counts packets arrived since last drop, so a greater
+ * value of q->count means a greater packet drop probability.
+ */
+ if (SCALE_MUL(p_b, SCALE((int64_t) q->count)) > q->random) {
+ q->count = 0;
+ DPRINTF(("dummynet: - red drop"));
+ /* after a drop we calculate a new random value */
+ q->random = (my_random() & 0xffff);
+ return 1; /* drop */
+ }
+ }
+ /* end of RED algorithm */
+ return 0; /* accept */
+}
+
+static __inline
+struct dn_flow_set *
+locate_flowset(int fs_nr)
+{
+ struct dn_flow_set *fs;
+ SLIST_FOREACH(fs, &flowsethash[HASH(fs_nr)], next) {
+ if (fs->fs_nr == fs_nr) {
+ return fs;
+ }
+ }
+
+ return NULL;
+}
+
+static __inline struct dn_pipe *
+locate_pipe(int pipe_nr)
+{
+ struct dn_pipe *pipe;
+
+ SLIST_FOREACH(pipe, &pipehash[HASH(pipe_nr)], next) {
+ if (pipe->pipe_nr == pipe_nr) {
+ return pipe;
+ }
+ }
+
+ return NULL;
+}
+
+
+
+/*
+ * dummynet hook for packets. Below 'pipe' is a pipe or a queue
+ * depending on whether WF2Q or fixed bw is used.
+ *
+ * pipe_nr pipe or queue the packet is destined for.
+ * dir where shall we send the packet after dummynet.
+ * m the mbuf with the packet
+ * ifp the 'ifp' parameter from the caller.
+ * NULL in ip_input, destination interface in ip_output,
+ * real_dst in bdg_forward
+ * ro route parameter (only used in ip_output, NULL otherwise)
+ * dst destination address, only used by ip_output
+ * rule matching rule, in case of multiple passes
+ * flags flags from the caller, only used in ip_output
+ *
+ */
+static int
+dummynet_io(struct mbuf *m, int pipe_nr, int dir, struct ip_fw_args *fwa)
+{
+ struct mbuf *head = NULL, *tail = NULL;
+ struct dn_pkt_tag *pkt;
+ struct m_tag *mtag;
+ struct dn_flow_set *fs = NULL;
+ struct dn_pipe *pipe;
+ u_int64_t len = m->m_pkthdr.len;
+ struct dn_flow_queue *q = NULL;
+ int is_pipe = 0;
+ struct timespec ts;
+ struct timeval tv;
+
+ DPRINTF(("dummynet_io m: 0x%llx pipe: %d dir: %d\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(m), pipe_nr, dir));
+
+
+#if DUMMYNET
+ is_pipe = fwa->fwa_flags == DN_IS_PIPE ? 1 : 0;
+#endif /* DUMMYNET */
+
+ pipe_nr &= 0xffff;
+
+ lck_mtx_lock(dn_mutex);
+
+ /* make all time measurements in milliseconds (ms) -
+ * here we convert secs and usecs to msecs (just divide the
+ * usecs and take the closest whole number).
+ */
+ microuptime(&tv);
+ curr_time = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
+
+ /*
+ * This is a dummynet rule, so we expect an O_PIPE or O_QUEUE rule.
+ */
+ if (is_pipe) {
+ pipe = locate_pipe(pipe_nr);
+ if (pipe != NULL) {
+ fs = &(pipe->fs);
+ }
+ } else {
+ fs = locate_flowset(pipe_nr);
+ }
+
+
+ if (fs == NULL) {
+ goto dropit; /* this queue/pipe does not exist! */
+ }
+ pipe = fs->pipe;
+ if (pipe == NULL) { /* must be a queue, try find a matching pipe */
+ pipe = locate_pipe(fs->parent_nr);
+
+ if (pipe != NULL) {
+ fs->pipe = pipe;
+ } else {
+ printf("dummynet: no pipe %d for queue %d, drop pkt\n",
+ fs->parent_nr, fs->fs_nr);
+ goto dropit;
+ }
+ }
+ q = find_queue(fs, &(fwa->fwa_id));
+ if (q == NULL) {
+ goto dropit; /* cannot allocate queue */
+ }
+ /*
+ * update statistics, then check reasons to drop pkt
+ */
+ q->tot_bytes += len;
+ q->tot_pkts++;
+ if (fs->plr && (my_random() < fs->plr)) {
+ goto dropit; /* random pkt drop */
+ }
+ if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
+ if (q->len_bytes > fs->qsize) {
+ goto dropit; /* queue size overflow */
+ }
+ } else {
+ if (q->len >= fs->qsize) {
+ goto dropit; /* queue count overflow */
+ }
+ }
+ if (fs->flags_fs & DN_IS_RED && red_drops(fs, q, len)) {
+ goto dropit;
+ }
+
+ /* XXX expensive to zero, see if we can remove it*/
+ mtag = m_tag_create(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_DUMMYNET,
+ sizeof(struct dn_pkt_tag), M_NOWAIT, m);
+ if (mtag == NULL) {
+ goto dropit; /* cannot allocate packet header */
+ }
+ m_tag_prepend(m, mtag); /* attach to mbuf chain */
+
+ pkt = (struct dn_pkt_tag *)(mtag + 1);
+ bzero(pkt, sizeof(struct dn_pkt_tag));
+ /* ok, i can handle the pkt now... */
+ /* build and enqueue packet + parameters */
+ pkt->dn_pf_rule = fwa->fwa_pf_rule;
+ pkt->dn_dir = dir;
+
+ pkt->dn_ifp = fwa->fwa_oif;
+ if (dir == DN_TO_IP_OUT) {
+ /*
+ * We need to copy *ro because for ICMP pkts (and maybe others)
+ * the caller passed a pointer into the stack; dst might also be
+ * a pointer into *ro so it needs to be updated.
+ */
+ if (fwa->fwa_ro) {
+ route_copyout(&pkt->dn_ro, fwa->fwa_ro, sizeof(pkt->dn_ro));
+ }
+ if (fwa->fwa_dst) {
+ if (fwa->fwa_dst == (struct sockaddr_in *)&fwa->fwa_ro->ro_dst) { /* dst points into ro */
+ fwa->fwa_dst = (struct sockaddr_in *)&(pkt->dn_ro.ro_dst);
+ }
+
+ bcopy(fwa->fwa_dst, &pkt->dn_dst, sizeof(pkt->dn_dst));
+ }
+ } else if (dir == DN_TO_IP6_OUT) {
+ if (fwa->fwa_ro6) {
+ route_copyout((struct route *)&pkt->dn_ro6,
+ (struct route *)fwa->fwa_ro6, sizeof(pkt->dn_ro6));
+ }
+ if (fwa->fwa_ro6_pmtu) {
+ route_copyout((struct route *)&pkt->dn_ro6_pmtu,
+ (struct route *)fwa->fwa_ro6_pmtu, sizeof(pkt->dn_ro6_pmtu));
+ }
+ if (fwa->fwa_dst6) {
+ if (fwa->fwa_dst6 == (struct sockaddr_in6 *)&fwa->fwa_ro6->ro_dst) { /* dst points into ro */
+ fwa->fwa_dst6 = (struct sockaddr_in6 *)&(pkt->dn_ro6.ro_dst);
+ }
+
+ bcopy(fwa->fwa_dst6, &pkt->dn_dst6, sizeof(pkt->dn_dst6));
+ }
+ pkt->dn_origifp = fwa->fwa_origifp;
+ pkt->dn_mtu = fwa->fwa_mtu;
+ pkt->dn_unfragpartlen = fwa->fwa_unfragpartlen;
+ if (fwa->fwa_exthdrs) {
+ bcopy(fwa->fwa_exthdrs, &pkt->dn_exthdrs, sizeof(pkt->dn_exthdrs));
+ /*
+ * Need to zero out the source structure so the mbufs
+ * won't be freed by ip6_output()
+ */
+ bzero(fwa->fwa_exthdrs, sizeof(struct ip6_exthdrs));
+ }
+ }
+ if (dir == DN_TO_IP_OUT || dir == DN_TO_IP6_OUT) {
+ pkt->dn_flags = fwa->fwa_oflags;
+ if (fwa->fwa_ipoa != NULL) {
+ pkt->dn_ipoa = *(fwa->fwa_ipoa);
+ }
+ }
+ if (q->head == NULL) {
+ q->head = m;
+ } else {
+ q->tail->m_nextpkt = m;
+ }
+ q->tail = m;
+ q->len++;
+ q->len_bytes += len;
+
+ if (q->head != m) { /* flow was not idle, we are done */
+ goto done;
+ }
+ /*
+ * If we reach this point the flow was previously idle, so we need
+ * to schedule it. This involves different actions for fixed-rate or
+ * WF2Q queues.
+ */
+ if (is_pipe) {
+ /*
+ * Fixed-rate queue: just insert into the ready_heap.
+ */
+ dn_key t = 0;
+ if (pipe->bandwidth) {
+ t = SET_TICKS(m, q, pipe);
+ }
+ q->sched_time = curr_time;
+ if (t == 0) { /* must process it now */
+ ready_event( q, &head, &tail );
+ } else {
+ heap_insert(&ready_heap, curr_time + t, q );
+ }
+ } else {
+ /*
+ * WF2Q. First, compute start time S: if the flow was idle (S=F+1)
+ * set S to the virtual time V for the controlling pipe, and update
+ * the sum of weights for the pipe; otherwise, remove flow from
+ * idle_heap and set S to max(F,V).
+ * Second, compute finish time F = S + len/weight.
+ * Third, if pipe was idle, update V=max(S, V).
+ * Fourth, count one more backlogged flow.
+ */
+ if (DN_KEY_GT(q->S, q->F)) { /* means timestamps are invalid */
+ q->S = pipe->V;
+ pipe->sum += fs->weight; /* add weight of new queue */
+ } else {
+ heap_extract(&(pipe->idle_heap), q);
+ q->S = MAX64(q->F, pipe->V );
+ }
+ q->F = q->S + (len << MY_M) / (u_int64_t) fs->weight;
+
+ if (pipe->not_eligible_heap.elements == 0 &&
+ pipe->scheduler_heap.elements == 0) {
+ pipe->V = MAX64( q->S, pipe->V );
+ }
+ fs->backlogged++;
+ /*
+ * Look at eligibility. A flow is not eligibile if S>V (when
+ * this happens, it means that there is some other flow already
+ * scheduled for the same pipe, so the scheduler_heap cannot be
+ * empty). If the flow is not eligible we just store it in the
+ * not_eligible_heap. Otherwise, we store in the scheduler_heap
+ * and possibly invoke ready_event_wfq() right now if there is
+ * leftover credit.
+ * Note that for all flows in scheduler_heap (SCH), S_i <= V,
+ * and for all flows in not_eligible_heap (NEH), S_i > V .
+ * So when we need to compute max( V, min(S_i) ) forall i in SCH+NEH,
+ * we only need to look into NEH.
+ */
+ if (DN_KEY_GT(q->S, pipe->V)) { /* not eligible */
+ if (pipe->scheduler_heap.elements == 0) {
+ printf("dummynet: ++ ouch! not eligible but empty scheduler!\n");
+ }
+ heap_insert(&(pipe->not_eligible_heap), q->S, q);
+ } else {
+ heap_insert(&(pipe->scheduler_heap), q->F, q);
+ if (pipe->numbytes >= 0) { /* pipe is idle */
+ if (pipe->scheduler_heap.elements != 1) {
+ printf("dummynet: OUCH! pipe should have been idle!\n");
+ }
+ DPRINTF(("dummynet: waking up pipe %d at %d\n",
+ pipe->pipe_nr, (int)(q->F >> MY_M)));
+ pipe->sched_time = curr_time;
+ ready_event_wfq(pipe, &head, &tail);
+ }
+ }
+ }
+done:
+ /* start the timer and set global if not already set */
+ if (!timer_enabled) {
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1 * 1000000; // 1ms
+ timer_enabled = 1;
+ bsd_timeout(dummynet, NULL, &ts);
+ }
+
+ lck_mtx_unlock(dn_mutex);
+
+ if (head != NULL) {
+ dummynet_send(head);
+ }
+
+ return 0;
+
+dropit:
+ if (q) {
+ q->drops++;
+ }
+ lck_mtx_unlock(dn_mutex);
+ m_freem(m);
+ return (fs && (fs->flags_fs & DN_NOERROR)) ? 0 : ENOBUFS;
+}
+
+/*
+ * Below, the ROUTE_RELEASE is only needed when (pkt->dn_dir == DN_TO_IP_OUT)
+ * Doing this would probably save us the initial bzero of dn_pkt
+ */
+#define DN_FREE_PKT(_m) do { \
+ struct m_tag *tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_DUMMYNET, NULL); \
+ if (tag) { \
+ struct dn_pkt_tag *n = (struct dn_pkt_tag *)(tag+1); \
+ ROUTE_RELEASE(&n->dn_ro); \
+ } \
+ m_tag_delete(_m, tag); \
+ m_freem(_m); \
+} while (0)
+
+/*
+ * Dispose all packets and flow_queues on a flow_set.
+ * If all=1, also remove red lookup table and other storage,
+ * including the descriptor itself.
+ * For the one in dn_pipe MUST also cleanup ready_heap...
+ */
+static void
+purge_flow_set(struct dn_flow_set *fs, int all)
+{
+ struct dn_flow_queue *q, *qn;
+ int i;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
+
+ for (i = 0; i <= fs->rq_size; i++) {
+ for (q = fs->rq[i]; q; q = qn) {
+ struct mbuf *m, *mnext;
+
+ mnext = q->head;
+ while ((m = mnext) != NULL) {
+ mnext = m->m_nextpkt;
+ DN_FREE_PKT(m);
+ }
+ qn = q->next;
+ FREE(q, M_DUMMYNET);
+ }
+ fs->rq[i] = NULL;
+ }
+ fs->rq_elements = 0;
+ if (all) {
+ /* RED - free lookup table */
+ if (fs->w_q_lookup) {
+ FREE(fs->w_q_lookup, M_DUMMYNET);
+ }
+ if (fs->rq) {
+ FREE(fs->rq, M_DUMMYNET);
+ }
+ /* if this fs is not part of a pipe, free it */
+ if (fs->pipe && fs != &(fs->pipe->fs)) {
+ FREE(fs, M_DUMMYNET);
+ }
+ }
+}
+
+/*
+ * Dispose all packets queued on a pipe (not a flow_set).
+ * Also free all resources associated to a pipe, which is about
+ * to be deleted.
+ */
+static void
+purge_pipe(struct dn_pipe *pipe)
+{
+ struct mbuf *m, *mnext;
+
+ purge_flow_set( &(pipe->fs), 1 );
+
+ mnext = pipe->head;
+ while ((m = mnext) != NULL) {
+ mnext = m->m_nextpkt;
+ DN_FREE_PKT(m);
+ }
+
+ heap_free( &(pipe->scheduler_heap));
+ heap_free( &(pipe->not_eligible_heap));
+ heap_free( &(pipe->idle_heap));
+}
+
+/*
+ * Delete all pipes and heaps returning memory.
+ */
+static void
+dummynet_flush(void)
+{
+ struct dn_pipe *pipe, *pipe1;
+ struct dn_flow_set *fs, *fs1;
+ int i;
+
+ lck_mtx_lock(dn_mutex);
+
+
+ /* Free heaps so we don't have unwanted events. */
+ heap_free(&ready_heap);
+ heap_free(&wfq_ready_heap);
+ heap_free(&extract_heap);
+
+ /*
+ * Now purge all queued pkts and delete all pipes.
+ *
+ * XXXGL: can we merge the for(;;) cycles into one or not?
+ */
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH_SAFE(fs, &flowsethash[i], next, fs1) {
+ SLIST_REMOVE(&flowsethash[i], fs, dn_flow_set, next);
+ purge_flow_set(fs, 1);
+ }
+ }
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH_SAFE(pipe, &pipehash[i], next, pipe1) {
+ SLIST_REMOVE(&pipehash[i], pipe, dn_pipe, next);
+ purge_pipe(pipe);
+ FREE(pipe, M_DUMMYNET);
+ }
+ }
+ lck_mtx_unlock(dn_mutex);
+}
+
+/*
+ * setup RED parameters
+ */
+static int
+config_red(struct dn_flow_set *p, struct dn_flow_set * x)
{
- DISPATCH(lkmtp, cmd, ver, dummynet_load, dummynet_unload, lkm_nullcmd);
+ int i;
+
+ x->w_q = p->w_q;
+ x->min_th = SCALE(p->min_th);
+ x->max_th = SCALE(p->max_th);
+ x->max_p = p->max_p;
+
+ x->c_1 = p->max_p / (p->max_th - p->min_th);
+ x->c_2 = SCALE_MUL(x->c_1, SCALE(p->min_th));
+ if (x->flags_fs & DN_IS_GENTLE_RED) {
+ x->c_3 = (SCALE(1) - p->max_p) / p->max_th;
+ x->c_4 = (SCALE(1) - 2 * p->max_p);
+ }
+
+ /* if the lookup table already exist, free and create it again */
+ if (x->w_q_lookup) {
+ FREE(x->w_q_lookup, M_DUMMYNET);
+ x->w_q_lookup = NULL;
+ }
+ if (red_lookup_depth == 0) {
+ printf("\ndummynet: net.inet.ip.dummynet.red_lookup_depth must be > 0\n");
+ FREE(x, M_DUMMYNET);
+ return EINVAL;
+ }
+ x->lookup_depth = red_lookup_depth;
+ x->w_q_lookup = (u_int *) _MALLOC(x->lookup_depth * sizeof(int),
+ M_DUMMYNET, M_DONTWAIT);
+ if (x->w_q_lookup == NULL) {
+ printf("dummynet: sorry, cannot allocate red lookup table\n");
+ FREE(x, M_DUMMYNET);
+ return ENOSPC;
+ }
+
+ /* fill the lookup table with (1 - w_q)^x */
+ x->lookup_step = p->lookup_step;
+ x->lookup_weight = p->lookup_weight;
+ x->w_q_lookup[0] = SCALE(1) - x->w_q;
+ for (i = 1; i < x->lookup_depth; i++) {
+ x->w_q_lookup[i] = SCALE_MUL(x->w_q_lookup[i - 1], x->lookup_weight);
+ }
+ if (red_avg_pkt_size < 1) {
+ red_avg_pkt_size = 512;
+ }
+ x->avg_pkt_size = red_avg_pkt_size;
+ if (red_max_pkt_size < 1) {
+ red_max_pkt_size = 1500;
+ }
+ x->max_pkt_size = red_max_pkt_size;
+ return 0;
+}
+
+static int
+alloc_hash(struct dn_flow_set *x, struct dn_flow_set *pfs)
+{
+ if (x->flags_fs & DN_HAVE_FLOW_MASK) { /* allocate some slots */
+ int l = pfs->rq_size;
+
+ if (l == 0) {
+ l = dn_hash_size;
+ }
+ if (l < 4) {
+ l = 4;
+ } else if (l > DN_MAX_HASH_SIZE) {
+ l = DN_MAX_HASH_SIZE;
+ }
+ x->rq_size = l;
+ } else { /* one is enough for null mask */
+ x->rq_size = 1;
+ }
+ x->rq = _MALLOC((1 + x->rq_size) * sizeof(struct dn_flow_queue *),
+ M_DUMMYNET, M_DONTWAIT | M_ZERO);
+ if (x->rq == NULL) {
+ printf("dummynet: sorry, cannot allocate queue\n");
+ return ENOSPC;
+ }
+ x->rq_elements = 0;
+ return 0;
+}
+
+static void
+set_fs_parms(struct dn_flow_set *x, struct dn_flow_set *src)
+{
+ x->flags_fs = src->flags_fs;
+ x->qsize = src->qsize;
+ x->plr = src->plr;
+ x->flow_mask = src->flow_mask;
+ if (x->flags_fs & DN_QSIZE_IS_BYTES) {
+ if (x->qsize > 1024 * 1024) {
+ x->qsize = 1024 * 1024;
+ }
+ } else {
+ if (x->qsize == 0) {
+ x->qsize = 50;
+ }
+ if (x->qsize > 100) {
+ x->qsize = 50;
+ }
+ }
+ /* configuring RED */
+ if (x->flags_fs & DN_IS_RED) {
+ config_red(src, x); /* XXX should check errors */
+ }
+}
+
+/*
+ * setup pipe or queue parameters.
+ */
+static int
+config_pipe(struct dn_pipe *p)
+{
+ int i, r;
+ struct dn_flow_set *pfs = &(p->fs);
+ struct dn_flow_queue *q;
+
+ /*
+ * The config program passes parameters as follows:
+ * bw = bits/second (0 means no limits),
+ * delay = ms, must be translated into ticks.
+ * qsize = slots/bytes
+ */
+ p->delay = (p->delay * (hz * 10)) / 1000;
+ /* We need either a pipe number or a flow_set number */
+ if (p->pipe_nr == 0 && pfs->fs_nr == 0) {
+ return EINVAL;
+ }
+ if (p->pipe_nr != 0 && pfs->fs_nr != 0) {
+ return EINVAL;
+ }
+ if (p->pipe_nr != 0) { /* this is a pipe */
+ struct dn_pipe *x, *b;
+ struct dummynet_event dn_event;
+ lck_mtx_lock(dn_mutex);
+
+ /* locate pipe */
+ b = locate_pipe(p->pipe_nr);
+
+ if (b == NULL || b->pipe_nr != p->pipe_nr) { /* new pipe */
+ x = _MALLOC(sizeof(struct dn_pipe), M_DUMMYNET, M_DONTWAIT | M_ZERO);
+ if (x == NULL) {
+ lck_mtx_unlock(dn_mutex);
+ printf("dummynet: no memory for new pipe\n");
+ return ENOSPC;
+ }
+ x->pipe_nr = p->pipe_nr;
+ x->fs.pipe = x;
+ /* idle_heap is the only one from which we extract from the middle.
+ */
+ x->idle_heap.size = x->idle_heap.elements = 0;
+ x->idle_heap.offset = offsetof(struct dn_flow_queue, heap_pos);
+ } else {
+ x = b;
+ /* Flush accumulated credit for all queues */
+ for (i = 0; i <= x->fs.rq_size; i++) {
+ for (q = x->fs.rq[i]; q; q = q->next) {
+ q->numbytes = 0;
+ }
+ }
+ }
+
+ x->bandwidth = p->bandwidth;
+ x->numbytes = 0; /* just in case... */
+ bcopy(p->if_name, x->if_name, sizeof(p->if_name));
+ x->ifp = NULL; /* reset interface ptr */
+ x->delay = p->delay;
+ set_fs_parms(&(x->fs), pfs);
+
+
+ if (x->fs.rq == NULL) { /* a new pipe */
+ r = alloc_hash(&(x->fs), pfs);
+ if (r) {
+ lck_mtx_unlock(dn_mutex);
+ FREE(x, M_DUMMYNET);
+ return r;
+ }
+ SLIST_INSERT_HEAD(&pipehash[HASH(x->pipe_nr)],
+ x, next);
+ }
+ lck_mtx_unlock(dn_mutex);
+
+ bzero(&dn_event, sizeof(dn_event));
+ dn_event.dn_event_code = DUMMYNET_PIPE_CONFIG;
+ dn_event.dn_event_pipe_config.bandwidth = p->bandwidth;
+ dn_event.dn_event_pipe_config.delay = p->delay;
+ dn_event.dn_event_pipe_config.plr = pfs->plr;
+
+ dummynet_event_enqueue_nwk_wq_entry(&dn_event);
+ } else { /* config queue */
+ struct dn_flow_set *x, *b;
+
+ lck_mtx_lock(dn_mutex);
+ /* locate flow_set */
+ b = locate_flowset(pfs->fs_nr);
+
+ if (b == NULL || b->fs_nr != pfs->fs_nr) { /* new */
+ if (pfs->parent_nr == 0) { /* need link to a pipe */
+ lck_mtx_unlock(dn_mutex);
+ return EINVAL;
+ }
+ x = _MALLOC(sizeof(struct dn_flow_set), M_DUMMYNET, M_DONTWAIT | M_ZERO);
+ if (x == NULL) {
+ lck_mtx_unlock(dn_mutex);
+ printf("dummynet: no memory for new flow_set\n");
+ return ENOSPC;
+ }
+ x->fs_nr = pfs->fs_nr;
+ x->parent_nr = pfs->parent_nr;
+ x->weight = pfs->weight;
+ if (x->weight == 0) {
+ x->weight = 1;
+ } else if (x->weight > 100) {
+ x->weight = 100;
+ }
+ } else {
+ /* Change parent pipe not allowed; must delete and recreate */
+ if (pfs->parent_nr != 0 && b->parent_nr != pfs->parent_nr) {
+ lck_mtx_unlock(dn_mutex);
+ return EINVAL;
+ }
+ x = b;
+ }
+ set_fs_parms(x, pfs);
+
+ if (x->rq == NULL) { /* a new flow_set */
+ r = alloc_hash(x, pfs);
+ if (r) {
+ lck_mtx_unlock(dn_mutex);
+ FREE(x, M_DUMMYNET);
+ return r;
+ }
+ SLIST_INSERT_HEAD(&flowsethash[HASH(x->fs_nr)],
+ x, next);
+ }
+ lck_mtx_unlock(dn_mutex);
+ }
+ return 0;
+}
+
+/*
+ * Helper function to remove from a heap queues which are linked to
+ * a flow_set about to be deleted.
+ */
+static void
+fs_remove_from_heap(struct dn_heap *h, struct dn_flow_set *fs)
+{
+ int i = 0, found = 0;
+ for (; i < h->elements;) {
+ if (((struct dn_flow_queue *)h->p[i].object)->fs == fs) {
+ h->elements--;
+ h->p[i] = h->p[h->elements];
+ found++;
+ } else {
+ i++;
+ }
+ }
+ if (found) {
+ heapify(h);
+ }
+}
+
+/*
+ * helper function to remove a pipe from a heap (can be there at most once)
+ */
+static void
+pipe_remove_from_heap(struct dn_heap *h, struct dn_pipe *p)
+{
+ if (h->elements > 0) {
+ int i = 0;
+ for (i = 0; i < h->elements; i++) {
+ if (h->p[i].object == p) { /* found it */
+ h->elements--;
+ h->p[i] = h->p[h->elements];
+ heapify(h);
+ break;
+ }
+ }
+ }
+}
+
+/*
+ * drain all queues. Called in case of severe mbuf shortage.
+ */
+void
+dummynet_drain(void)
+{
+ struct dn_flow_set *fs;
+ struct dn_pipe *p;
+ struct mbuf *m, *mnext;
+ int i;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
+
+ heap_free(&ready_heap);
+ heap_free(&wfq_ready_heap);
+ heap_free(&extract_heap);
+ /* remove all references to this pipe from flow_sets */
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(fs, &flowsethash[i], next) {
+ purge_flow_set(fs, 0);
+ }
+ }
+
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(p, &pipehash[i], next) {
+ purge_flow_set(&(p->fs), 0);
+
+ mnext = p->head;
+ while ((m = mnext) != NULL) {
+ mnext = m->m_nextpkt;
+ DN_FREE_PKT(m);
+ }
+ p->head = p->tail = NULL;
+ }
+ }
}
+
+/*
+ * Fully delete a pipe or a queue, cleaning up associated info.
+ */
+static int
+delete_pipe(struct dn_pipe *p)
+{
+ if (p->pipe_nr == 0 && p->fs.fs_nr == 0) {
+ return EINVAL;
+ }
+ if (p->pipe_nr != 0 && p->fs.fs_nr != 0) {
+ return EINVAL;
+ }
+ if (p->pipe_nr != 0) { /* this is an old-style pipe */
+ struct dn_pipe *b;
+ struct dn_flow_set *fs;
+ int i;
+
+ lck_mtx_lock(dn_mutex);
+ /* locate pipe */
+ b = locate_pipe(p->pipe_nr);
+ if (b == NULL) {
+ lck_mtx_unlock(dn_mutex);
+ return EINVAL; /* not found */
+ }
+
+ /* Unlink from list of pipes. */
+ SLIST_REMOVE(&pipehash[HASH(b->pipe_nr)], b, dn_pipe, next);
+
+
+ /* Remove all references to this pipe from flow_sets. */
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(fs, &flowsethash[i], next) {
+ if (fs->pipe == b) {
+ printf("dummynet: ++ ref to pipe %d from fs %d\n",
+ p->pipe_nr, fs->fs_nr);
+ fs->pipe = NULL;
+ purge_flow_set(fs, 0);
+ }
+ }
+ }
+ fs_remove_from_heap(&ready_heap, &(b->fs));
+
+ purge_pipe(b); /* remove all data associated to this pipe */
+ /* remove reference to here from extract_heap and wfq_ready_heap */
+ pipe_remove_from_heap(&extract_heap, b);
+ pipe_remove_from_heap(&wfq_ready_heap, b);
+ lck_mtx_unlock(dn_mutex);
+
+ FREE(b, M_DUMMYNET);
+ } else { /* this is a WF2Q queue (dn_flow_set) */
+ struct dn_flow_set *b;
+
+ lck_mtx_lock(dn_mutex);
+ /* locate set */
+ b = locate_flowset(p->fs.fs_nr);
+ if (b == NULL) {
+ lck_mtx_unlock(dn_mutex);
+ return EINVAL; /* not found */
+ }
+
+
+ /* Unlink from list of flowsets. */
+ SLIST_REMOVE( &flowsethash[HASH(b->fs_nr)], b, dn_flow_set, next);
+
+ if (b->pipe != NULL) {
+ /* Update total weight on parent pipe and cleanup parent heaps */
+ b->pipe->sum -= b->weight * b->backlogged;
+ fs_remove_from_heap(&(b->pipe->not_eligible_heap), b);
+ fs_remove_from_heap(&(b->pipe->scheduler_heap), b);
+#if 1 /* XXX should i remove from idle_heap as well ? */
+ fs_remove_from_heap(&(b->pipe->idle_heap), b);
#endif
+ }
+ purge_flow_set(b, 1);
+ lck_mtx_unlock(dn_mutex);
+ }
+ return 0;
+}
+
+/*
+ * helper function used to copy data from kernel in DUMMYNET_GET
+ */
+static
+char*
+dn_copy_set_32(struct dn_flow_set *set, char *bp)
+{
+ int i, copied = 0;
+ struct dn_flow_queue *q;
+ struct dn_flow_queue_32 *qp = (struct dn_flow_queue_32 *)bp;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
+
+ for (i = 0; i <= set->rq_size; i++) {
+ for (q = set->rq[i]; q; q = q->next, qp++) {
+ if (q->hash_slot != i) {
+ printf("dummynet: ++ at %d: wrong slot (have %d, "
+ "should be %d)\n", copied, q->hash_slot, i);
+ }
+ if (q->fs != set) {
+ printf("dummynet: ++ at %d: wrong fs ptr "
+ "(have 0x%llx, should be 0x%llx)\n", i,
+ (uint64_t)VM_KERNEL_ADDRPERM(q->fs),
+ (uint64_t)VM_KERNEL_ADDRPERM(set));
+ }
+ copied++;
+ cp_queue_to_32_user( q, qp );
+ /* cleanup pointers */
+ qp->next = (user32_addr_t)0;
+ qp->head = qp->tail = (user32_addr_t)0;
+ qp->fs = (user32_addr_t)0;
+ }
+ }
+ if (copied != set->rq_elements) {
+ printf("dummynet: ++ wrong count, have %d should be %d\n",
+ copied, set->rq_elements);
+ }
+ return (char *)qp;
+}
+
+static
+char*
+dn_copy_set_64(struct dn_flow_set *set, char *bp)
+{
+ int i, copied = 0;
+ struct dn_flow_queue *q;
+ struct dn_flow_queue_64 *qp = (struct dn_flow_queue_64 *)bp;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
+
+ for (i = 0; i <= set->rq_size; i++) {
+ for (q = set->rq[i]; q; q = q->next, qp++) {
+ if (q->hash_slot != i) {
+ printf("dummynet: ++ at %d: wrong slot (have %d, "
+ "should be %d)\n", copied, q->hash_slot, i);
+ }
+ if (q->fs != set) {
+ printf("dummynet: ++ at %d: wrong fs ptr "
+ "(have 0x%llx, should be 0x%llx)\n", i,
+ (uint64_t)VM_KERNEL_ADDRPERM(q->fs),
+ (uint64_t)VM_KERNEL_ADDRPERM(set));
+ }
+ copied++;
+ //bcopy(q, qp, sizeof(*q));
+ cp_queue_to_64_user( q, qp );
+ /* cleanup pointers */
+ qp->next = USER_ADDR_NULL;
+ qp->head = qp->tail = USER_ADDR_NULL;
+ qp->fs = USER_ADDR_NULL;
+ }
+ }
+ if (copied != set->rq_elements) {
+ printf("dummynet: ++ wrong count, have %d should be %d\n",
+ copied, set->rq_elements);
+ }
+ return (char *)qp;
+}
+
+static size_t
+dn_calc_size(int is64user)
+{
+ struct dn_flow_set *set;
+ struct dn_pipe *p;
+ size_t size = 0;
+ size_t pipesize;
+ size_t queuesize;
+ size_t setsize;
+ int i;
+
+ LCK_MTX_ASSERT(dn_mutex, LCK_MTX_ASSERT_OWNED);
+ if (is64user) {
+ pipesize = sizeof(struct dn_pipe_64);
+ queuesize = sizeof(struct dn_flow_queue_64);
+ setsize = sizeof(struct dn_flow_set_64);
+ } else {
+ pipesize = sizeof(struct dn_pipe_32);
+ queuesize = sizeof(struct dn_flow_queue_32);
+ setsize = sizeof(struct dn_flow_set_32);
+ }
+ /*
+ * compute size of data structures: list of pipes and flow_sets.
+ */
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(p, &pipehash[i], next) {
+ size += sizeof(*p) +
+ p->fs.rq_elements * sizeof(struct dn_flow_queue);
+ }
+ SLIST_FOREACH(set, &flowsethash[i], next) {
+ size += sizeof(*set) +
+ set->rq_elements * sizeof(struct dn_flow_queue);
+ }
+ }
+ return size;
+}
+
+static int
+dummynet_get(struct sockopt *sopt)
+{
+ char *buf = NULL, *bp = NULL; /* bp is the "copy-pointer" */
+ size_t size = 0;
+ struct dn_flow_set *set;
+ struct dn_pipe *p;
+ int error = 0, i;
+ int is64user = 0;
+
+ /* XXX lock held too long */
+ lck_mtx_lock(dn_mutex);
+ /*
+ * XXX: Ugly, but we need to allocate memory with M_WAITOK flag
+ * and we cannot use this flag while holding a mutex.
+ */
+ if (proc_is64bit(sopt->sopt_p)) {
+ is64user = 1;
+ }
+ for (i = 0; i < 10; i++) {
+ size = dn_calc_size(is64user);
+ lck_mtx_unlock(dn_mutex);
+ buf = _MALLOC(size, M_TEMP, M_WAITOK | M_ZERO);
+ if (buf == NULL) {
+ return ENOBUFS;
+ }
+ lck_mtx_lock(dn_mutex);
+ if (size == dn_calc_size(is64user)) {
+ break;
+ }
+ FREE(buf, M_TEMP);
+ buf = NULL;
+ }
+ if (buf == NULL) {
+ lck_mtx_unlock(dn_mutex);
+ return ENOBUFS;
+ }
+
+ bp = buf;
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(p, &pipehash[i], next) {
+ /*
+ * copy pipe descriptor into *bp, convert delay
+ * back to ms, then copy the flow_set descriptor(s)
+ * one at a time. After each flow_set, copy the
+ * queue descriptor it owns.
+ */
+ if (is64user) {
+ bp = cp_pipe_to_64_user(p,
+ (struct dn_pipe_64 *)bp);
+ } else {
+ bp = cp_pipe_to_32_user(p,
+ (struct dn_pipe_32 *)bp);
+ }
+ }
+ }
+ for (i = 0; i < HASHSIZE; i++) {
+ SLIST_FOREACH(set, &flowsethash[i], next) {
+ struct dn_flow_set_64 *fs_bp =
+ (struct dn_flow_set_64 *)bp;
+ cp_flow_set_to_64_user(set, fs_bp);
+ /* XXX same hack as above */
+ fs_bp->next = CAST_DOWN(user64_addr_t,
+ DN_IS_QUEUE);
+ fs_bp->pipe = USER_ADDR_NULL;
+ fs_bp->rq = USER_ADDR_NULL;
+ bp += sizeof(struct dn_flow_set_64);
+ bp = dn_copy_set_64( set, bp );
+ }
+ }
+ lck_mtx_unlock(dn_mutex);
+ error = sooptcopyout(sopt, buf, size);
+ FREE(buf, M_TEMP);
+ return error;
+}
+
+/*
+ * Handler for the various dummynet socket options (get, flush, config, del)
+ */
+static int
+ip_dn_ctl(struct sockopt *sopt)
+{
+ int error = 0;
+ struct dn_pipe *p, tmp_pipe;
+
+ /* Disallow sets in really-really secure mode. */
+ if (sopt->sopt_dir == SOPT_SET && securelevel >= 3) {
+ return EPERM;
+ }
+
+ switch (sopt->sopt_name) {
+ default:
+ printf("dummynet: -- unknown option %d", sopt->sopt_name);
+ return EINVAL;
+
+ case IP_DUMMYNET_GET:
+ error = dummynet_get(sopt);
+ break;
+
+ case IP_DUMMYNET_FLUSH:
+ dummynet_flush();
+ break;
+
+ case IP_DUMMYNET_CONFIGURE:
+ p = &tmp_pipe;
+ if (proc_is64bit(sopt->sopt_p)) {
+ error = cp_pipe_from_user_64( sopt, p );
+ } else {
+ error = cp_pipe_from_user_32( sopt, p );
+ }
+
+ if (error) {
+ break;
+ }
+ error = config_pipe(p);
+ break;
+
+ case IP_DUMMYNET_DEL: /* remove a pipe or queue */
+ p = &tmp_pipe;
+ if (proc_is64bit(sopt->sopt_p)) {
+ error = cp_pipe_from_user_64( sopt, p );
+ } else {
+ error = cp_pipe_from_user_32( sopt, p );
+ }
+ if (error) {
+ break;
+ }
+
+ error = delete_pipe(p);
+ break;
+ }
+ return error;
+}
+
+void
+dummynet_init(void)
+{
+ eventhandler_lists_ctxt_init(&dummynet_evhdlr_ctxt);
+}
+
+void
+ip_dn_init(void)
+{
+ /* setup locks */
+ dn_mutex_grp_attr = lck_grp_attr_alloc_init();
+ dn_mutex_grp = lck_grp_alloc_init("dn", dn_mutex_grp_attr);
+ dn_mutex_attr = lck_attr_alloc_init();
+ lck_mtx_init(dn_mutex, dn_mutex_grp, dn_mutex_attr);
+
+ ready_heap.size = ready_heap.elements = 0;
+ ready_heap.offset = 0;
+
+ wfq_ready_heap.size = wfq_ready_heap.elements = 0;
+ wfq_ready_heap.offset = 0;
+
+ extract_heap.size = extract_heap.elements = 0;
+ extract_heap.offset = 0;
+ ip_dn_ctl_ptr = ip_dn_ctl;
+ ip_dn_io_ptr = dummynet_io;
+}
+
+struct dn_event_nwk_wq_entry {
+ struct nwk_wq_entry nwk_wqe;
+ struct dummynet_event dn_ev_arg;
+};
+
+static void
+dummynet_event_callback(void *arg)
+{
+ struct dummynet_event *p_dn_ev = (struct dummynet_event *)arg;
+
+ EVENTHANDLER_INVOKE(&dummynet_evhdlr_ctxt, dummynet_event, p_dn_ev);
+ return;
+}
+
+void
+dummynet_event_enqueue_nwk_wq_entry(struct dummynet_event *p_dn_event)
+{
+ struct dn_event_nwk_wq_entry *p_dn_ev = NULL;
+
+ MALLOC(p_dn_ev, struct dn_event_nwk_wq_entry *,
+ sizeof(struct dn_event_nwk_wq_entry),
+ M_NWKWQ, M_WAITOK | M_ZERO);
+
+ p_dn_ev->nwk_wqe.func = dummynet_event_callback;
+ p_dn_ev->nwk_wqe.is_arg_managed = TRUE;
+ p_dn_ev->nwk_wqe.arg = &p_dn_ev->dn_ev_arg;
+
+ bcopy(p_dn_event, &(p_dn_ev->dn_ev_arg),
+ sizeof(struct dummynet_event));
+ nwk_wq_enqueue((struct nwk_wq_entry*)p_dn_ev);
+}
projects / apple / xnu.git / blobdiff