1821 lines
40 KiB
C
1821 lines
40 KiB
C
/* $NetBSD: altq_hfsc.c,v 1.7 2003/01/06 03:44:23 christos Exp $ */
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/* $KAME: altq_hfsc.c,v 1.9 2001/10/26 04:56:11 kjc Exp $ */
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/*
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* Copyright (c) 1997-1999 Carnegie Mellon University. All Rights Reserved.
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation is hereby granted (including for commercial or
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* for-profit use), provided that both the copyright notice and this
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* permission notice appear in all copies of the software, derivative
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* works, or modified versions, and any portions thereof, and that
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* both notices appear in supporting documentation, and that credit
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* is given to Carnegie Mellon University in all publications reporting
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* on direct or indirect use of this code or its derivatives.
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*
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* THIS SOFTWARE IS EXPERIMENTAL AND IS KNOWN TO HAVE BUGS, SOME OF
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* WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON PROVIDES THIS
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* SOFTWARE IN ITS ``AS IS'' CONDITION, AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* Carnegie Mellon encourages (but does not require) users of this
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* software to return any improvements or extensions that they make,
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* and to grant Carnegie Mellon the rights to redistribute these
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* changes without encumbrance.
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*/
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/*
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* H-FSC is described in Proceedings of SIGCOMM'97,
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* "A Hierarchical Fair Service Curve Algorithm for Link-Sharing,
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* Real-Time and Priority Service"
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* by Ion Stoica, Hui Zhang, and T. S. Eugene Ng.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: altq_hfsc.c,v 1.7 2003/01/06 03:44:23 christos Exp $");
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#if defined(__FreeBSD__) || defined(__NetBSD__)
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#include "opt_altq.h"
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#if (__FreeBSD__ != 2)
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#include "opt_inet.h"
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#ifdef __FreeBSD__
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#include "opt_inet6.h"
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#endif
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#endif
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#endif /* __FreeBSD__ || __NetBSD__ */
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#ifdef ALTQ_HFSC /* hfsc is enabled by ALTQ_HFSC option in opt_altq.h */
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/queue.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <altq/altq.h>
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#include <altq/altq_conf.h>
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#include <altq/altq_hfsc.h>
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/*
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* function prototypes
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*/
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static struct hfsc_if *hfsc_attach __P((struct ifaltq *, u_int));
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static int hfsc_detach __P((struct hfsc_if *));
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static int hfsc_clear_interface __P((struct hfsc_if *));
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static int hfsc_request __P((struct ifaltq *, int, void *));
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static void hfsc_purge __P((struct hfsc_if *));
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static struct hfsc_class *hfsc_class_create __P((struct hfsc_if *,
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struct service_curve *, struct hfsc_class *, int, int));
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static int hfsc_class_destroy __P((struct hfsc_class *));
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static int hfsc_class_modify __P((struct hfsc_class *,
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struct service_curve *, struct service_curve *));
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static struct hfsc_class *hfsc_nextclass __P((struct hfsc_class *));
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static int hfsc_enqueue __P((struct ifaltq *, struct mbuf *,
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struct altq_pktattr *));
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static struct mbuf *hfsc_dequeue __P((struct ifaltq *, int));
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static int hfsc_addq __P((struct hfsc_class *, struct mbuf *));
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static struct mbuf *hfsc_getq __P((struct hfsc_class *));
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static struct mbuf *hfsc_pollq __P((struct hfsc_class *));
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static void hfsc_purgeq __P((struct hfsc_class *));
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static void set_active __P((struct hfsc_class *, int));
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static void set_passive __P((struct hfsc_class *));
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static void init_ed __P((struct hfsc_class *, int));
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static void update_ed __P((struct hfsc_class *, int));
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static void update_d __P((struct hfsc_class *, int));
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static void init_v __P((struct hfsc_class *, int));
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static void update_v __P((struct hfsc_class *, int));
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static ellist_t *ellist_alloc __P((void));
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static void ellist_destroy __P((ellist_t *));
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static void ellist_insert __P((struct hfsc_class *));
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static void ellist_remove __P((struct hfsc_class *));
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static void ellist_update __P((struct hfsc_class *));
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struct hfsc_class *ellist_get_mindl __P((ellist_t *));
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static actlist_t *actlist_alloc __P((void));
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static void actlist_destroy __P((actlist_t *));
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static void actlist_insert __P((struct hfsc_class *));
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static void actlist_remove __P((struct hfsc_class *));
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static void actlist_update __P((struct hfsc_class *));
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static __inline u_int64_t seg_x2y __P((u_int64_t, u_int64_t));
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static __inline u_int64_t seg_y2x __P((u_int64_t, u_int64_t));
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static __inline u_int64_t m2sm __P((u_int));
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static __inline u_int64_t m2ism __P((u_int));
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static __inline u_int64_t d2dx __P((u_int));
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static u_int sm2m __P((u_int64_t));
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static u_int dx2d __P((u_int64_t));
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static void sc2isc __P((struct service_curve *, struct internal_sc *));
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static void rtsc_init __P((struct runtime_sc *, struct internal_sc *,
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u_int64_t, u_int64_t));
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static u_int64_t rtsc_y2x __P((struct runtime_sc *, u_int64_t));
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static u_int64_t rtsc_x2y __P((struct runtime_sc *, u_int64_t));
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static void rtsc_min __P((struct runtime_sc *, struct internal_sc *,
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u_int64_t, u_int64_t));
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int hfscopen __P((dev_t, int, int, struct proc *));
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int hfscclose __P((dev_t, int, int, struct proc *));
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int hfscioctl __P((dev_t, ioctlcmd_t, caddr_t, int, struct proc *));
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static int hfsccmd_if_attach __P((struct hfsc_attach *));
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static int hfsccmd_if_detach __P((struct hfsc_interface *));
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static int hfsccmd_add_class __P((struct hfsc_add_class *));
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static int hfsccmd_delete_class __P((struct hfsc_delete_class *));
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static int hfsccmd_modify_class __P((struct hfsc_modify_class *));
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static int hfsccmd_add_filter __P((struct hfsc_add_filter *));
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static int hfsccmd_delete_filter __P((struct hfsc_delete_filter *));
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static int hfsccmd_class_stats __P((struct hfsc_class_stats *));
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static void get_class_stats __P((struct hfsc_basic_class_stats *,
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struct hfsc_class *));
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static struct hfsc_class *clh_to_clp __P((struct hfsc_if *, u_long));
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static u_long clp_to_clh __P((struct hfsc_class *));
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/*
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* macros
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*/
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#define is_a_parent_class(cl) ((cl)->cl_children != NULL)
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/* hif_list keeps all hfsc_if's allocated. */
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static struct hfsc_if *hif_list = NULL;
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static struct hfsc_if *
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hfsc_attach(ifq, bandwidth)
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struct ifaltq *ifq;
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u_int bandwidth;
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{
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struct hfsc_if *hif;
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struct service_curve root_sc;
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MALLOC(hif, struct hfsc_if *, sizeof(struct hfsc_if),
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M_DEVBUF, M_WAITOK);
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if (hif == NULL)
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return (NULL);
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bzero(hif, sizeof(struct hfsc_if));
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hif->hif_eligible = ellist_alloc();
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if (hif->hif_eligible == NULL) {
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FREE(hif, M_DEVBUF);
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return NULL;
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}
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hif->hif_ifq = ifq;
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/*
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* create root class
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*/
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root_sc.m1 = bandwidth;
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root_sc.d = 0;
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root_sc.m2 = bandwidth;
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if ((hif->hif_rootclass =
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hfsc_class_create(hif, &root_sc, NULL, 0, 0)) == NULL) {
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FREE(hif, M_DEVBUF);
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return (NULL);
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}
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/* add this state to the hfsc list */
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hif->hif_next = hif_list;
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hif_list = hif;
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return (hif);
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}
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static int
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hfsc_detach(hif)
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struct hfsc_if *hif;
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{
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(void)hfsc_clear_interface(hif);
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(void)hfsc_class_destroy(hif->hif_rootclass);
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/* remove this interface from the hif list */
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if (hif_list == hif)
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hif_list = hif->hif_next;
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else {
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struct hfsc_if *h;
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for (h = hif_list; h != NULL; h = h->hif_next)
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if (h->hif_next == hif) {
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h->hif_next = hif->hif_next;
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break;
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}
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ASSERT(h != NULL);
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}
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ellist_destroy(hif->hif_eligible);
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FREE(hif, M_DEVBUF);
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return (0);
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}
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/*
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* bring the interface back to the initial state by discarding
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* all the filters and classes except the root class.
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*/
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static int
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hfsc_clear_interface(hif)
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struct hfsc_if *hif;
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{
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struct hfsc_class *cl;
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/* free the filters for this interface */
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acc_discard_filters(&hif->hif_classifier, NULL, 1);
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/* clear out the classes */
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while ((cl = hif->hif_rootclass->cl_children) != NULL) {
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/*
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* remove the first leaf class found in the hierarchy
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* then start over
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*/
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for (; cl != NULL; cl = hfsc_nextclass(cl)) {
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if (!is_a_parent_class(cl)) {
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(void)hfsc_class_destroy(cl);
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break;
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}
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}
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}
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return (0);
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}
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static int
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hfsc_request(ifq, req, arg)
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struct ifaltq *ifq;
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int req;
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void *arg;
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{
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struct hfsc_if *hif = (struct hfsc_if *)ifq->altq_disc;
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switch (req) {
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case ALTRQ_PURGE:
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hfsc_purge(hif);
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break;
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}
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return (0);
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}
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/* discard all the queued packets on the interface */
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static void
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hfsc_purge(hif)
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struct hfsc_if *hif;
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{
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struct hfsc_class *cl;
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for (cl = hif->hif_rootclass; cl != NULL; cl = hfsc_nextclass(cl))
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if (!qempty(cl->cl_q))
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hfsc_purgeq(cl);
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if (ALTQ_IS_ENABLED(hif->hif_ifq))
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hif->hif_ifq->ifq_len = 0;
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}
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struct hfsc_class *
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hfsc_class_create(hif, sc, parent, qlimit, flags)
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struct hfsc_if *hif;
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struct service_curve *sc;
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struct hfsc_class *parent;
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int qlimit, flags;
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{
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struct hfsc_class *cl, *p;
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int s;
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#ifndef ALTQ_RED
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if (flags & HFCF_RED) {
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printf("hfsc_class_create: RED not configured for HFSC!\n");
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return (NULL);
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}
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#endif
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MALLOC(cl, struct hfsc_class *, sizeof(struct hfsc_class),
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M_DEVBUF, M_WAITOK);
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if (cl == NULL)
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return (NULL);
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bzero(cl, sizeof(struct hfsc_class));
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MALLOC(cl->cl_q, class_queue_t *, sizeof(class_queue_t),
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M_DEVBUF, M_WAITOK);
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if (cl->cl_q == NULL)
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goto err_ret;
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bzero(cl->cl_q, sizeof(class_queue_t));
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cl->cl_actc = actlist_alloc();
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if (cl->cl_actc == NULL)
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goto err_ret;
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if (qlimit == 0)
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qlimit = 50; /* use default */
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qlimit(cl->cl_q) = qlimit;
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qtype(cl->cl_q) = Q_DROPTAIL;
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qlen(cl->cl_q) = 0;
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cl->cl_flags = flags;
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#ifdef ALTQ_RED
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if (flags & (HFCF_RED|HFCF_RIO)) {
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int red_flags, red_pkttime;
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red_flags = 0;
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if (flags & HFCF_ECN)
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red_flags |= REDF_ECN;
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#ifdef ALTQ_RIO
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if (flags & HFCF_CLEARDSCP)
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red_flags |= RIOF_CLEARDSCP;
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#endif
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if (sc->m2 < 8)
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red_pkttime = 1000 * 1000 * 1000; /* 1 sec */
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else
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red_pkttime = (int64_t)hif->hif_ifq->altq_ifp->if_mtu
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* 1000 * 1000 * 1000 / (sc->m2 / 8);
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if (flags & HFCF_RED) {
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cl->cl_red = red_alloc(0, 0, 0, 0,
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red_flags, red_pkttime);
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if (cl->cl_red != NULL)
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qtype(cl->cl_q) = Q_RED;
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}
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#ifdef ALTQ_RIO
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else {
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cl->cl_red = (red_t *)rio_alloc(0, NULL,
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red_flags, red_pkttime);
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if (cl->cl_red != NULL)
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qtype(cl->cl_q) = Q_RIO;
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}
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#endif
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}
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#endif /* ALTQ_RED */
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if (sc != NULL && (sc->m1 != 0 || sc->m2 != 0)) {
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MALLOC(cl->cl_rsc, struct internal_sc *,
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sizeof(struct internal_sc), M_DEVBUF, M_WAITOK);
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if (cl->cl_rsc == NULL)
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goto err_ret;
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bzero(cl->cl_rsc, sizeof(struct internal_sc));
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sc2isc(sc, cl->cl_rsc);
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rtsc_init(&cl->cl_deadline, cl->cl_rsc, 0, 0);
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rtsc_init(&cl->cl_eligible, cl->cl_rsc, 0, 0);
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MALLOC(cl->cl_fsc, struct internal_sc *,
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sizeof(struct internal_sc), M_DEVBUF, M_WAITOK);
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if (cl->cl_fsc == NULL)
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goto err_ret;
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bzero(cl->cl_fsc, sizeof(struct internal_sc));
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sc2isc(sc, cl->cl_fsc);
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rtsc_init(&cl->cl_virtual, cl->cl_fsc, 0, 0);
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}
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cl->cl_id = hif->hif_classid++;
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cl->cl_handle = (u_long)cl; /* XXX: just a pointer to this class */
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cl->cl_hif = hif;
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cl->cl_parent = parent;
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s = splnet();
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hif->hif_classes++;
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if (flags & HFCF_DEFAULTCLASS)
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hif->hif_defaultclass = cl;
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/* add this class to the children list of the parent */
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if (parent == NULL) {
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/* this is root class */
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}
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else if ((p = parent->cl_children) == NULL)
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parent->cl_children = cl;
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else {
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while (p->cl_siblings != NULL)
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p = p->cl_siblings;
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p->cl_siblings = cl;
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}
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splx(s);
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return (cl);
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err_ret:
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if (cl->cl_actc != NULL)
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actlist_destroy(cl->cl_actc);
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if (cl->cl_red != NULL) {
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#ifdef ALTQ_RIO
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if (q_is_rio(cl->cl_q))
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rio_destroy((rio_t *)cl->cl_red);
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#endif
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#ifdef ALTQ_RED
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if (q_is_red(cl->cl_q))
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red_destroy(cl->cl_red);
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#endif
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}
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if (cl->cl_fsc != NULL)
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FREE(cl->cl_fsc, M_DEVBUF);
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if (cl->cl_rsc != NULL)
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FREE(cl->cl_rsc, M_DEVBUF);
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if (cl->cl_q != NULL)
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FREE(cl->cl_q, M_DEVBUF);
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FREE(cl, M_DEVBUF);
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return (NULL);
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}
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static int
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hfsc_class_destroy(cl)
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struct hfsc_class *cl;
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{
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int s;
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if (is_a_parent_class(cl))
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return (EBUSY);
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s = splnet();
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/* delete filters referencing to this class */
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acc_discard_filters(&cl->cl_hif->hif_classifier, cl, 0);
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if (!qempty(cl->cl_q))
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hfsc_purgeq(cl);
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if (cl->cl_parent == NULL) {
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/* this is root class */
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} else {
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struct hfsc_class *p = cl->cl_parent->cl_children;
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if (p == cl)
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cl->cl_parent->cl_children = cl->cl_siblings;
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else do {
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if (p->cl_siblings == cl) {
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p->cl_siblings = cl->cl_siblings;
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break;
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}
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} while ((p = p->cl_siblings) != NULL);
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ASSERT(p != NULL);
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}
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cl->cl_hif->hif_classes--;
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splx(s);
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actlist_destroy(cl->cl_actc);
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|
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if (cl->cl_red != NULL) {
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#ifdef ALTQ_RIO
|
|
if (q_is_rio(cl->cl_q))
|
|
rio_destroy((rio_t *)cl->cl_red);
|
|
#endif
|
|
#ifdef ALTQ_RED
|
|
if (q_is_red(cl->cl_q))
|
|
red_destroy(cl->cl_red);
|
|
#endif
|
|
}
|
|
if (cl->cl_fsc != NULL)
|
|
FREE(cl->cl_fsc, M_DEVBUF);
|
|
if (cl->cl_rsc != NULL)
|
|
FREE(cl->cl_rsc, M_DEVBUF);
|
|
FREE(cl->cl_q, M_DEVBUF);
|
|
FREE(cl, M_DEVBUF);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
hfsc_class_modify(cl, rsc, fsc)
|
|
struct hfsc_class *cl;
|
|
struct service_curve *rsc, *fsc;
|
|
{
|
|
struct internal_sc *rsc_tmp, *fsc_tmp;
|
|
int s;
|
|
|
|
if (rsc != NULL && (rsc->m1 != 0 || rsc->m2 != 0) &&
|
|
cl->cl_rsc == NULL) {
|
|
MALLOC(rsc_tmp, struct internal_sc *,
|
|
sizeof(struct internal_sc), M_DEVBUF, M_WAITOK);
|
|
if (rsc_tmp == NULL)
|
|
return (ENOMEM);
|
|
}
|
|
if (fsc != NULL && (fsc->m1 != 0 || fsc->m2 != 0) &&
|
|
cl->cl_fsc == NULL) {
|
|
MALLOC(fsc_tmp, struct internal_sc *,
|
|
sizeof(struct internal_sc), M_DEVBUF, M_WAITOK);
|
|
if (fsc_tmp == NULL)
|
|
return (ENOMEM);
|
|
}
|
|
|
|
s = splnet();
|
|
if (!qempty(cl->cl_q))
|
|
hfsc_purgeq(cl);
|
|
|
|
if (rsc != NULL) {
|
|
if (rsc->m1 == 0 && rsc->m2 == 0) {
|
|
if (cl->cl_rsc != NULL) {
|
|
FREE(cl->cl_rsc, M_DEVBUF);
|
|
cl->cl_rsc = NULL;
|
|
}
|
|
} else {
|
|
if (cl->cl_rsc == NULL)
|
|
cl->cl_rsc = rsc_tmp;
|
|
bzero(cl->cl_rsc, sizeof(struct internal_sc));
|
|
sc2isc(rsc, cl->cl_rsc);
|
|
rtsc_init(&cl->cl_deadline, cl->cl_rsc, 0, 0);
|
|
rtsc_init(&cl->cl_eligible, cl->cl_rsc, 0, 0);
|
|
}
|
|
}
|
|
|
|
if (fsc != NULL) {
|
|
if (fsc->m1 == 0 && fsc->m2 == 0) {
|
|
if (cl->cl_fsc != NULL) {
|
|
FREE(cl->cl_fsc, M_DEVBUF);
|
|
cl->cl_fsc = NULL;
|
|
}
|
|
} else {
|
|
if (cl->cl_fsc == NULL)
|
|
cl->cl_fsc = fsc_tmp;
|
|
bzero(cl->cl_fsc, sizeof(struct internal_sc));
|
|
sc2isc(fsc, cl->cl_fsc);
|
|
rtsc_init(&cl->cl_virtual, cl->cl_fsc, 0, 0);
|
|
}
|
|
}
|
|
splx(s);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* hfsc_nextclass returns the next class in the tree.
|
|
* usage:
|
|
* for (cl = hif->hif_rootclass; cl != NULL; cl = hfsc_nextclass(cl))
|
|
* do_something;
|
|
*/
|
|
static struct hfsc_class *
|
|
hfsc_nextclass(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
if (cl->cl_children != NULL)
|
|
cl = cl->cl_children;
|
|
else if (cl->cl_siblings != NULL)
|
|
cl = cl->cl_siblings;
|
|
else {
|
|
while ((cl = cl->cl_parent) != NULL)
|
|
if (cl->cl_siblings) {
|
|
cl = cl->cl_siblings;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (cl);
|
|
}
|
|
|
|
/*
|
|
* hfsc_enqueue is an enqueue function to be registered to
|
|
* (*altq_enqueue) in struct ifaltq.
|
|
*/
|
|
static int
|
|
hfsc_enqueue(ifq, m, pktattr)
|
|
struct ifaltq *ifq;
|
|
struct mbuf *m;
|
|
struct altq_pktattr *pktattr;
|
|
{
|
|
struct hfsc_if *hif = (struct hfsc_if *)ifq->altq_disc;
|
|
struct hfsc_class *cl;
|
|
int len;
|
|
|
|
/* grab class set by classifier */
|
|
if (pktattr == NULL || (cl = pktattr->pattr_class) == NULL)
|
|
cl = hif->hif_defaultclass;
|
|
cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */
|
|
|
|
len = m_pktlen(m);
|
|
if (hfsc_addq(cl, m) != 0) {
|
|
/* drop occurred. mbuf was freed in hfsc_addq. */
|
|
PKTCNTR_ADD(&cl->cl_stats.drop_cnt, len);
|
|
return (ENOBUFS);
|
|
}
|
|
IFQ_INC_LEN(ifq);
|
|
cl->cl_hif->hif_packets++;
|
|
|
|
/* successfully queued. */
|
|
if (qlen(cl->cl_q) == 1)
|
|
set_active(cl, m_pktlen(m));
|
|
|
|
#ifdef HFSC_PKTLOG
|
|
/* put the logging_hook here */
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* hfsc_dequeue is a dequeue function to be registered to
|
|
* (*altq_dequeue) in struct ifaltq.
|
|
*
|
|
* note: ALTDQ_POLL returns the next packet without removing the packet
|
|
* from the queue. ALTDQ_REMOVE is a normal dequeue operation.
|
|
* ALTDQ_REMOVE must return the same packet if called immediately
|
|
* after ALTDQ_POLL.
|
|
*/
|
|
static struct mbuf *
|
|
hfsc_dequeue(ifq, op)
|
|
struct ifaltq *ifq;
|
|
int op;
|
|
{
|
|
struct hfsc_if *hif = (struct hfsc_if *)ifq->altq_disc;
|
|
struct hfsc_class *cl;
|
|
struct mbuf *m;
|
|
int len, next_len;
|
|
int realtime = 0;
|
|
|
|
if (hif->hif_packets == 0)
|
|
/* no packet in the tree */
|
|
return (NULL);
|
|
|
|
if (op == ALTDQ_REMOVE && hif->hif_pollcache != NULL) {
|
|
u_int64_t cur_time;
|
|
|
|
cl = hif->hif_pollcache;
|
|
hif->hif_pollcache = NULL;
|
|
/* check if the class was scheduled by real-time criteria */
|
|
if (cl->cl_rsc != NULL) {
|
|
cur_time = read_machclk();
|
|
realtime = (cl->cl_e <= cur_time);
|
|
}
|
|
} else {
|
|
/*
|
|
* if there are eligible classes, use real-time criteria.
|
|
* find the class with the minimum deadline among
|
|
* the eligible classes.
|
|
*/
|
|
if ((cl = ellist_get_mindl(hif->hif_eligible)) != NULL) {
|
|
realtime = 1;
|
|
} else {
|
|
/*
|
|
* use link-sharing criteria
|
|
* get the class with the minimum vt in the hierarchy
|
|
*/
|
|
cl = hif->hif_rootclass;
|
|
while (is_a_parent_class(cl)) {
|
|
cl = actlist_first(cl->cl_actc);
|
|
if (cl == NULL)
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
if (op == ALTDQ_POLL) {
|
|
hif->hif_pollcache = cl;
|
|
m = hfsc_pollq(cl);
|
|
return (m);
|
|
}
|
|
}
|
|
|
|
m = hfsc_getq(cl);
|
|
len = m_pktlen(m);
|
|
cl->cl_hif->hif_packets--;
|
|
IFQ_DEC_LEN(ifq);
|
|
PKTCNTR_ADD(&cl->cl_stats.xmit_cnt, len);
|
|
|
|
update_v(cl, len);
|
|
if (realtime)
|
|
cl->cl_cumul += len;
|
|
|
|
if (!qempty(cl->cl_q)) {
|
|
if (cl->cl_rsc != NULL) {
|
|
/* update ed */
|
|
next_len = m_pktlen(qhead(cl->cl_q));
|
|
|
|
if (realtime)
|
|
update_ed(cl, next_len);
|
|
else
|
|
update_d(cl, next_len);
|
|
}
|
|
} else {
|
|
/* the class becomes passive */
|
|
set_passive(cl);
|
|
}
|
|
|
|
#ifdef HFSC_PKTLOG
|
|
/* put the logging_hook here */
|
|
#endif
|
|
|
|
return (m);
|
|
}
|
|
|
|
static int
|
|
hfsc_addq(cl, m)
|
|
struct hfsc_class *cl;
|
|
struct mbuf *m;
|
|
{
|
|
|
|
#ifdef ALTQ_RIO
|
|
if (q_is_rio(cl->cl_q))
|
|
return rio_addq((rio_t *)cl->cl_red, cl->cl_q,
|
|
m, cl->cl_pktattr);
|
|
#endif
|
|
#ifdef ALTQ_RED
|
|
if (q_is_red(cl->cl_q))
|
|
return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr);
|
|
#endif
|
|
if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) {
|
|
m_freem(m);
|
|
return (-1);
|
|
}
|
|
|
|
if (cl->cl_flags & HFCF_CLEARDSCP)
|
|
write_dsfield(m, cl->cl_pktattr, 0);
|
|
|
|
_addq(cl->cl_q, m);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct mbuf *
|
|
hfsc_getq(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
#ifdef ALTQ_RIO
|
|
if (q_is_rio(cl->cl_q))
|
|
return rio_getq((rio_t *)cl->cl_red, cl->cl_q);
|
|
#endif
|
|
#ifdef ALTQ_RED
|
|
if (q_is_red(cl->cl_q))
|
|
return red_getq(cl->cl_red, cl->cl_q);
|
|
#endif
|
|
return _getq(cl->cl_q);
|
|
}
|
|
|
|
static struct mbuf *
|
|
hfsc_pollq(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
return qhead(cl->cl_q);
|
|
}
|
|
|
|
static void
|
|
hfsc_purgeq(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
struct mbuf *m;
|
|
|
|
if (qempty(cl->cl_q))
|
|
return;
|
|
|
|
while ((m = _getq(cl->cl_q)) != NULL) {
|
|
PKTCNTR_ADD(&cl->cl_stats.drop_cnt, m_pktlen(m));
|
|
m_freem(m);
|
|
}
|
|
ASSERT(qlen(cl->cl_q) == 0);
|
|
|
|
set_passive(cl);
|
|
}
|
|
|
|
static void
|
|
set_active(cl, len)
|
|
struct hfsc_class *cl;
|
|
int len;
|
|
{
|
|
if (cl->cl_rsc != NULL)
|
|
init_ed(cl, len);
|
|
if (cl->cl_fsc != NULL)
|
|
init_v(cl, len);
|
|
|
|
cl->cl_stats.period++;
|
|
}
|
|
|
|
static void
|
|
set_passive(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
if (cl->cl_rsc != NULL)
|
|
ellist_remove(cl);
|
|
|
|
if (cl->cl_fsc != NULL) {
|
|
while (cl->cl_parent != NULL) {
|
|
if (--cl->cl_nactive == 0) {
|
|
/* remove this class from the vt list */
|
|
actlist_remove(cl);
|
|
} else
|
|
/* still has active children */
|
|
break;
|
|
|
|
/* go up to the parent class */
|
|
cl = cl->cl_parent;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
init_ed(cl, next_len)
|
|
struct hfsc_class *cl;
|
|
int next_len;
|
|
{
|
|
u_int64_t cur_time;
|
|
|
|
cur_time = read_machclk();
|
|
|
|
/* update the deadline curve */
|
|
rtsc_min(&cl->cl_deadline, cl->cl_rsc, cur_time, cl->cl_cumul);
|
|
|
|
/*
|
|
* update the eligible curve.
|
|
* for concave, it is equal to the deadline curve.
|
|
* for convex, it is a linear curve with slope m2.
|
|
*/
|
|
cl->cl_eligible = cl->cl_deadline;
|
|
if (cl->cl_rsc->sm1 <= cl->cl_rsc->sm2) {
|
|
cl->cl_eligible.dx = 0;
|
|
cl->cl_eligible.dy = 0;
|
|
}
|
|
|
|
/* compute e and d */
|
|
cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul);
|
|
cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len);
|
|
|
|
ellist_insert(cl);
|
|
}
|
|
|
|
static void
|
|
update_ed(cl, next_len)
|
|
struct hfsc_class *cl;
|
|
int next_len;
|
|
{
|
|
cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul);
|
|
cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len);
|
|
|
|
ellist_update(cl);
|
|
}
|
|
|
|
static void
|
|
update_d(cl, next_len)
|
|
struct hfsc_class *cl;
|
|
int next_len;
|
|
{
|
|
cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len);
|
|
}
|
|
|
|
static void
|
|
init_v(cl, len)
|
|
struct hfsc_class *cl;
|
|
int len;
|
|
{
|
|
struct hfsc_class *min_cl, *max_cl;
|
|
|
|
while (cl->cl_parent != NULL) {
|
|
|
|
if (cl->cl_nactive++ > 0)
|
|
/* already active */
|
|
break;
|
|
|
|
/*
|
|
* if parent became idle while this class was idle.
|
|
* reset vt and the runtime service curve.
|
|
*/
|
|
if (cl->cl_parent->cl_nactive == 0 ||
|
|
cl->cl_parent->cl_vtperiod != cl->cl_parentperiod) {
|
|
cl->cl_vt = 0;
|
|
rtsc_init(&cl->cl_virtual, cl->cl_fsc,
|
|
0, cl->cl_total);
|
|
}
|
|
min_cl = actlist_first(cl->cl_parent->cl_actc);
|
|
if (min_cl != NULL) {
|
|
u_int64_t vt;
|
|
|
|
/*
|
|
* set vt to the average of the min and max classes.
|
|
* if the parent's period didn't change,
|
|
* don't decrease vt of the class.
|
|
*/
|
|
max_cl = actlist_last(cl->cl_parent->cl_actc);
|
|
vt = (min_cl->cl_vt + max_cl->cl_vt) / 2;
|
|
if (cl->cl_parent->cl_vtperiod != cl->cl_parentperiod
|
|
|| vt > cl->cl_vt)
|
|
cl->cl_vt = vt;
|
|
}
|
|
|
|
/* update the virtual curve */
|
|
rtsc_min(&cl->cl_virtual, cl->cl_fsc, cl->cl_vt, cl->cl_total);
|
|
|
|
cl->cl_vtperiod++; /* increment vt period */
|
|
cl->cl_parentperiod = cl->cl_parent->cl_vtperiod;
|
|
if (cl->cl_parent->cl_nactive == 0)
|
|
cl->cl_parentperiod++;
|
|
|
|
actlist_insert(cl);
|
|
|
|
/* go up to the parent class */
|
|
cl = cl->cl_parent;
|
|
}
|
|
}
|
|
|
|
static void
|
|
update_v(cl, len)
|
|
struct hfsc_class *cl;
|
|
int len;
|
|
{
|
|
while (cl->cl_parent != NULL) {
|
|
|
|
cl->cl_total += len;
|
|
|
|
if (cl->cl_fsc != NULL) {
|
|
cl->cl_vt = rtsc_y2x(&cl->cl_virtual, cl->cl_total);
|
|
|
|
/* update the vt list */
|
|
actlist_update(cl);
|
|
}
|
|
|
|
/* go up to the parent class */
|
|
cl = cl->cl_parent;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* TAILQ based ellist and actlist implementation
|
|
* (ion wanted to make a calendar queue based implementation)
|
|
*/
|
|
/*
|
|
* eligible list holds backlogged classes being sorted by their eligible times.
|
|
* there is one eligible list per interface.
|
|
*/
|
|
|
|
static ellist_t *
|
|
ellist_alloc()
|
|
{
|
|
ellist_t *head;
|
|
|
|
MALLOC(head, ellist_t *, sizeof(ellist_t), M_DEVBUF, M_WAITOK);
|
|
TAILQ_INIT(head);
|
|
return (head);
|
|
}
|
|
|
|
static void
|
|
ellist_destroy(head)
|
|
ellist_t *head;
|
|
{
|
|
FREE(head, M_DEVBUF);
|
|
}
|
|
|
|
static void
|
|
ellist_insert(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
struct hfsc_if *hif = cl->cl_hif;
|
|
struct hfsc_class *p;
|
|
|
|
/* check the last entry first */
|
|
if ((p = TAILQ_LAST(hif->hif_eligible, _eligible)) == NULL ||
|
|
p->cl_e <= cl->cl_e) {
|
|
TAILQ_INSERT_TAIL(hif->hif_eligible, cl, cl_ellist);
|
|
return;
|
|
}
|
|
|
|
TAILQ_FOREACH(p, hif->hif_eligible, cl_ellist) {
|
|
if (cl->cl_e < p->cl_e) {
|
|
TAILQ_INSERT_BEFORE(p, cl, cl_ellist);
|
|
return;
|
|
}
|
|
}
|
|
ASSERT(0); /* should not reach here */
|
|
}
|
|
|
|
static void
|
|
ellist_remove(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
struct hfsc_if *hif = cl->cl_hif;
|
|
|
|
TAILQ_REMOVE(hif->hif_eligible, cl, cl_ellist);
|
|
}
|
|
|
|
static void
|
|
ellist_update(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
struct hfsc_if *hif = cl->cl_hif;
|
|
struct hfsc_class *p, *last;
|
|
|
|
/*
|
|
* the eligible time of a class increases monotonically.
|
|
* if the next entry has a larger eligible time, nothing to do.
|
|
*/
|
|
p = TAILQ_NEXT(cl, cl_ellist);
|
|
if (p == NULL || cl->cl_e <= p->cl_e)
|
|
return;
|
|
|
|
/* check the last entry */
|
|
last = TAILQ_LAST(hif->hif_eligible, _eligible);
|
|
ASSERT(last != NULL);
|
|
if (last->cl_e <= cl->cl_e) {
|
|
TAILQ_REMOVE(hif->hif_eligible, cl, cl_ellist);
|
|
TAILQ_INSERT_TAIL(hif->hif_eligible, cl, cl_ellist);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* the new position must be between the next entry
|
|
* and the last entry
|
|
*/
|
|
while ((p = TAILQ_NEXT(p, cl_ellist)) != NULL) {
|
|
if (cl->cl_e < p->cl_e) {
|
|
TAILQ_REMOVE(hif->hif_eligible, cl, cl_ellist);
|
|
TAILQ_INSERT_BEFORE(p, cl, cl_ellist);
|
|
return;
|
|
}
|
|
}
|
|
ASSERT(0); /* should not reach here */
|
|
}
|
|
|
|
/* find the class with the minimum deadline among the eligible classes */
|
|
struct hfsc_class *
|
|
ellist_get_mindl(head)
|
|
ellist_t *head;
|
|
{
|
|
struct hfsc_class *p, *cl = NULL;
|
|
u_int64_t cur_time;
|
|
|
|
cur_time = read_machclk();
|
|
|
|
TAILQ_FOREACH(p, head, cl_ellist) {
|
|
if (p->cl_e > cur_time)
|
|
break;
|
|
if (cl == NULL || p->cl_d < cl->cl_d)
|
|
cl = p;
|
|
}
|
|
return (cl);
|
|
}
|
|
|
|
/*
|
|
* active children list holds backlogged child classes being sorted
|
|
* by their virtual time.
|
|
* each intermediate class has one active children list.
|
|
*/
|
|
static actlist_t *
|
|
actlist_alloc()
|
|
{
|
|
actlist_t *head;
|
|
|
|
MALLOC(head, actlist_t *, sizeof(actlist_t), M_DEVBUF, M_WAITOK);
|
|
TAILQ_INIT(head);
|
|
return (head);
|
|
}
|
|
|
|
static void
|
|
actlist_destroy(head)
|
|
actlist_t *head;
|
|
{
|
|
FREE(head, M_DEVBUF);
|
|
}
|
|
static void
|
|
actlist_insert(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
struct hfsc_class *p;
|
|
|
|
/* check the last entry first */
|
|
if ((p = TAILQ_LAST(cl->cl_parent->cl_actc, _active)) == NULL
|
|
|| p->cl_vt <= cl->cl_vt) {
|
|
TAILQ_INSERT_TAIL(cl->cl_parent->cl_actc, cl, cl_actlist);
|
|
return;
|
|
}
|
|
|
|
TAILQ_FOREACH(p, cl->cl_parent->cl_actc, cl_actlist) {
|
|
if (cl->cl_vt < p->cl_vt) {
|
|
TAILQ_INSERT_BEFORE(p, cl, cl_actlist);
|
|
return;
|
|
}
|
|
}
|
|
ASSERT(0); /* should not reach here */
|
|
}
|
|
|
|
static void
|
|
actlist_remove(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
TAILQ_REMOVE(cl->cl_parent->cl_actc, cl, cl_actlist);
|
|
}
|
|
|
|
static void
|
|
actlist_update(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
struct hfsc_class *p, *last;
|
|
|
|
/*
|
|
* the virtual time of a class increases monotonically during its
|
|
* backlogged period.
|
|
* if the next entry has a larger virtual time, nothing to do.
|
|
*/
|
|
p = TAILQ_NEXT(cl, cl_actlist);
|
|
if (p == NULL || cl->cl_vt <= p->cl_vt)
|
|
return;
|
|
|
|
/* check the last entry */
|
|
last = TAILQ_LAST(cl->cl_parent->cl_actc, _active);
|
|
ASSERT(last != NULL);
|
|
if (last->cl_vt <= cl->cl_vt) {
|
|
TAILQ_REMOVE(cl->cl_parent->cl_actc, cl, cl_actlist);
|
|
TAILQ_INSERT_TAIL(cl->cl_parent->cl_actc, cl, cl_actlist);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* the new position must be between the next entry
|
|
* and the last entry
|
|
*/
|
|
while ((p = TAILQ_NEXT(p, cl_actlist)) != NULL) {
|
|
if (cl->cl_vt < p->cl_vt) {
|
|
TAILQ_REMOVE(cl->cl_parent->cl_actc, cl, cl_actlist);
|
|
TAILQ_INSERT_BEFORE(p, cl, cl_actlist);
|
|
return;
|
|
}
|
|
}
|
|
ASSERT(0); /* should not reach here */
|
|
}
|
|
|
|
/*
|
|
* service curve support functions
|
|
*
|
|
* external service curve parameters
|
|
* m: bits/sec
|
|
* d: msec
|
|
* internal service curve parameters
|
|
* sm: (bytes/tsc_interval) << SM_SHIFT
|
|
* ism: (tsc_count/byte) << ISM_SHIFT
|
|
* dx: tsc_count
|
|
*
|
|
* SM_SHIFT and ISM_SHIFT are scaled in order to keep effective digits.
|
|
* we should be able to handle 100K-1Gbps linkspeed with 200Hz-1GHz CPU
|
|
* speed. SM_SHIFT and ISM_SHIFT are selected to have at least 3 effective
|
|
* digits in decimal using the following table.
|
|
*
|
|
* bits/set 100Kbps 1Mbps 10Mbps 100Mbps 1Gbps
|
|
* ----------+-------------------------------------------------------
|
|
* bytes/nsec 12.5e-6 125e-6 1250e-6 12500e-6 125000e-6
|
|
* sm(500MHz) 25.0e-6 250e-6 2500e-6 25000e-6 250000e-6
|
|
* sm(200MHz) 62.5e-6 625e-6 6250e-6 62500e-6 625000e-6
|
|
*
|
|
* nsec/byte 80000 8000 800 80 8
|
|
* ism(500MHz) 40000 4000 400 40 4
|
|
* ism(200MHz) 16000 1600 160 16 1.6
|
|
*/
|
|
#define SM_SHIFT 24
|
|
#define ISM_SHIFT 10
|
|
|
|
#define SC_LARGEVAL (1LL << 32)
|
|
#define SC_INFINITY 0xffffffffffffffffLL
|
|
|
|
static __inline u_int64_t
|
|
seg_x2y(x, sm)
|
|
u_int64_t x;
|
|
u_int64_t sm;
|
|
{
|
|
u_int64_t y;
|
|
|
|
if (x < SC_LARGEVAL)
|
|
y = x * sm >> SM_SHIFT;
|
|
else
|
|
y = (x >> SM_SHIFT) * sm;
|
|
return (y);
|
|
}
|
|
|
|
static __inline u_int64_t
|
|
seg_y2x(y, ism)
|
|
u_int64_t y;
|
|
u_int64_t ism;
|
|
{
|
|
u_int64_t x;
|
|
|
|
if (y == 0)
|
|
x = 0;
|
|
else if (ism == SC_INFINITY)
|
|
x = SC_INFINITY;
|
|
else if (y < SC_LARGEVAL)
|
|
x = y * ism >> ISM_SHIFT;
|
|
else
|
|
x = (y >> ISM_SHIFT) * ism;
|
|
return (x);
|
|
}
|
|
|
|
static __inline u_int64_t
|
|
m2sm(m)
|
|
u_int m;
|
|
{
|
|
u_int64_t sm;
|
|
|
|
sm = ((u_int64_t)m << SM_SHIFT) / 8 / machclk_freq;
|
|
return (sm);
|
|
}
|
|
|
|
static __inline u_int64_t
|
|
m2ism(m)
|
|
u_int m;
|
|
{
|
|
u_int64_t ism;
|
|
|
|
if (m == 0)
|
|
ism = SC_INFINITY;
|
|
else
|
|
ism = ((u_int64_t)machclk_freq << ISM_SHIFT) * 8 / m;
|
|
return (ism);
|
|
}
|
|
|
|
static __inline u_int64_t
|
|
d2dx(d)
|
|
u_int d;
|
|
{
|
|
u_int64_t dx;
|
|
|
|
dx = ((u_int64_t)d * machclk_freq) / 1000;
|
|
return (dx);
|
|
}
|
|
|
|
static u_int
|
|
sm2m(sm)
|
|
u_int64_t sm;
|
|
{
|
|
u_int64_t m;
|
|
|
|
m = (sm * 8 * machclk_freq) >> SM_SHIFT;
|
|
return ((u_int)m);
|
|
}
|
|
|
|
static u_int
|
|
dx2d(dx)
|
|
u_int64_t dx;
|
|
{
|
|
u_int64_t d;
|
|
|
|
d = dx * 1000 / machclk_freq;
|
|
return ((u_int)d);
|
|
}
|
|
|
|
static void
|
|
sc2isc(sc, isc)
|
|
struct service_curve *sc;
|
|
struct internal_sc *isc;
|
|
{
|
|
isc->sm1 = m2sm(sc->m1);
|
|
isc->ism1 = m2ism(sc->m1);
|
|
isc->dx = d2dx(sc->d);
|
|
isc->dy = seg_x2y(isc->dx, isc->sm1);
|
|
isc->sm2 = m2sm(sc->m2);
|
|
isc->ism2 = m2ism(sc->m2);
|
|
}
|
|
|
|
/*
|
|
* initialize the runtime service curve with the given internal
|
|
* service curve starting at (x, y).
|
|
*/
|
|
static void
|
|
rtsc_init(rtsc, isc, x, y)
|
|
struct runtime_sc *rtsc;
|
|
struct internal_sc *isc;
|
|
u_int64_t x, y;
|
|
{
|
|
rtsc->x = x;
|
|
rtsc->y = y;
|
|
rtsc->sm1 = isc->sm1;
|
|
rtsc->ism1 = isc->ism1;
|
|
rtsc->dx = isc->dx;
|
|
rtsc->dy = isc->dy;
|
|
rtsc->sm2 = isc->sm2;
|
|
rtsc->ism2 = isc->ism2;
|
|
}
|
|
|
|
/*
|
|
* calculate the y-projection of the runtime service curve by the
|
|
* given x-projection value
|
|
*/
|
|
static u_int64_t
|
|
rtsc_y2x(rtsc, y)
|
|
struct runtime_sc *rtsc;
|
|
u_int64_t y;
|
|
{
|
|
u_int64_t x;
|
|
|
|
if (y < rtsc->y)
|
|
x = rtsc->x;
|
|
else if (y <= rtsc->y + rtsc->dy) {
|
|
/* x belongs to the 1st segment */
|
|
if (rtsc->dy == 0)
|
|
x = rtsc->x + rtsc->dx;
|
|
else
|
|
x = rtsc->x + seg_y2x(y - rtsc->y, rtsc->ism1);
|
|
} else {
|
|
/* x belongs to the 2nd segment */
|
|
x = rtsc->x + rtsc->dx
|
|
+ seg_y2x(y - rtsc->y - rtsc->dy, rtsc->ism2);
|
|
}
|
|
return (x);
|
|
}
|
|
|
|
static u_int64_t
|
|
rtsc_x2y(rtsc, x)
|
|
struct runtime_sc *rtsc;
|
|
u_int64_t x;
|
|
{
|
|
u_int64_t y;
|
|
|
|
if (x <= rtsc->x)
|
|
y = rtsc->y;
|
|
else if (x <= rtsc->x + rtsc->dx)
|
|
/* y belongs to the 1st segment */
|
|
y = rtsc->y + seg_x2y(x - rtsc->x, rtsc->sm1);
|
|
else
|
|
/* y belongs to the 2nd segment */
|
|
y = rtsc->y + rtsc->dy
|
|
+ seg_x2y(x - rtsc->x - rtsc->dx, rtsc->sm2);
|
|
return (y);
|
|
}
|
|
|
|
/*
|
|
* update the runtime service curve by taking the minimum of the current
|
|
* runtime service curve and the service curve starting at (x, y).
|
|
*/
|
|
static void
|
|
rtsc_min(rtsc, isc, x, y)
|
|
struct runtime_sc *rtsc;
|
|
struct internal_sc *isc;
|
|
u_int64_t x, y;
|
|
{
|
|
u_int64_t y1, y2, dx, dy;
|
|
|
|
if (isc->sm1 <= isc->sm2) {
|
|
/* service curve is convex */
|
|
y1 = rtsc_x2y(rtsc, x);
|
|
if (y1 < y)
|
|
/* the current rtsc is smaller */
|
|
return;
|
|
rtsc->x = x;
|
|
rtsc->y = y;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* service curve is concave
|
|
* compute the two y values of the current rtsc
|
|
* y1: at x
|
|
* y2: at (x + dx)
|
|
*/
|
|
y1 = rtsc_x2y(rtsc, x);
|
|
if (y1 <= y) {
|
|
/* rtsc is below isc, no change to rtsc */
|
|
return;
|
|
}
|
|
|
|
y2 = rtsc_x2y(rtsc, x + isc->dx);
|
|
if (y2 >= y + isc->dy) {
|
|
/* rtsc is above isc, replace rtsc by isc */
|
|
rtsc->x = x;
|
|
rtsc->y = y;
|
|
rtsc->dx = isc->dx;
|
|
rtsc->dy = isc->dy;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* the two curves intersect
|
|
* compute the offsets (dx, dy) using the reverse
|
|
* function of seg_x2y()
|
|
* seg_x2y(dx, sm1) == seg_x2y(dx, sm2) + (y1 - y)
|
|
*/
|
|
dx = ((y1 - y) << SM_SHIFT) / (isc->sm1 - isc->sm2);
|
|
/*
|
|
* check if (x, y1) belongs to the 1st segment of rtsc.
|
|
* if so, add the offset.
|
|
*/
|
|
if (rtsc->x + rtsc->dx > x)
|
|
dx += rtsc->x + rtsc->dx - x;
|
|
dy = seg_x2y(dx, isc->sm1);
|
|
|
|
rtsc->x = x;
|
|
rtsc->y = y;
|
|
rtsc->dx = dx;
|
|
rtsc->dy = dy;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* hfsc device interface
|
|
*/
|
|
int
|
|
hfscopen(dev, flag, fmt, p)
|
|
dev_t dev;
|
|
int flag, fmt;
|
|
struct proc *p;
|
|
{
|
|
if (machclk_freq == 0)
|
|
init_machclk();
|
|
|
|
if (machclk_freq == 0) {
|
|
printf("hfsc: no cpu clock available!\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* everything will be done when the queueing scheme is attached. */
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
hfscclose(dev, flag, fmt, p)
|
|
dev_t dev;
|
|
int flag, fmt;
|
|
struct proc *p;
|
|
{
|
|
struct hfsc_if *hif;
|
|
int err, error = 0;
|
|
|
|
while ((hif = hif_list) != NULL) {
|
|
/* destroy all */
|
|
if (ALTQ_IS_ENABLED(hif->hif_ifq))
|
|
altq_disable(hif->hif_ifq);
|
|
|
|
err = altq_detach(hif->hif_ifq);
|
|
if (err == 0)
|
|
err = hfsc_detach(hif);
|
|
if (err != 0 && error == 0)
|
|
error = err;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
hfscioctl(dev, cmd, addr, flag, p)
|
|
dev_t dev;
|
|
ioctlcmd_t cmd;
|
|
caddr_t addr;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct hfsc_interface *ifacep;
|
|
int error = 0;
|
|
|
|
/* check super-user privilege */
|
|
switch (cmd) {
|
|
case HFSC_GETSTATS:
|
|
break;
|
|
default:
|
|
#if (__FreeBSD_version > 400000)
|
|
if ((error = suser(p)) != 0)
|
|
return (error);
|
|
#else
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case HFSC_IF_ATTACH:
|
|
error = hfsccmd_if_attach((struct hfsc_attach *)addr);
|
|
break;
|
|
|
|
case HFSC_IF_DETACH:
|
|
error = hfsccmd_if_detach((struct hfsc_interface *)addr);
|
|
break;
|
|
|
|
case HFSC_ENABLE:
|
|
case HFSC_DISABLE:
|
|
case HFSC_CLEAR_HIERARCHY:
|
|
ifacep = (struct hfsc_interface *)addr;
|
|
if ((hif = altq_lookup(ifacep->hfsc_ifname,
|
|
ALTQT_HFSC)) == NULL) {
|
|
error = EBADF;
|
|
break;
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case HFSC_ENABLE:
|
|
if (hif->hif_defaultclass == NULL) {
|
|
#if 1
|
|
printf("hfsc: no default class\n");
|
|
#endif
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
error = altq_enable(hif->hif_ifq);
|
|
break;
|
|
|
|
case HFSC_DISABLE:
|
|
error = altq_disable(hif->hif_ifq);
|
|
break;
|
|
|
|
case HFSC_CLEAR_HIERARCHY:
|
|
hfsc_clear_interface(hif);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case HFSC_ADD_CLASS:
|
|
error = hfsccmd_add_class((struct hfsc_add_class *)addr);
|
|
break;
|
|
|
|
case HFSC_DEL_CLASS:
|
|
error = hfsccmd_delete_class((struct hfsc_delete_class *)addr);
|
|
break;
|
|
|
|
case HFSC_MOD_CLASS:
|
|
error = hfsccmd_modify_class((struct hfsc_modify_class *)addr);
|
|
break;
|
|
|
|
case HFSC_ADD_FILTER:
|
|
error = hfsccmd_add_filter((struct hfsc_add_filter *)addr);
|
|
break;
|
|
|
|
case HFSC_DEL_FILTER:
|
|
error = hfsccmd_delete_filter((struct hfsc_delete_filter *)addr);
|
|
break;
|
|
|
|
case HFSC_GETSTATS:
|
|
error = hfsccmd_class_stats((struct hfsc_class_stats *)addr);
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
hfsccmd_if_attach(ap)
|
|
struct hfsc_attach *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct ifnet *ifp;
|
|
int error;
|
|
|
|
if ((ifp = ifunit(ap->iface.hfsc_ifname)) == NULL)
|
|
return (ENXIO);
|
|
|
|
if ((hif = hfsc_attach(&ifp->if_snd, ap->bandwidth)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
/*
|
|
* set HFSC to this ifnet structure.
|
|
*/
|
|
if ((error = altq_attach(&ifp->if_snd, ALTQT_HFSC, hif,
|
|
hfsc_enqueue, hfsc_dequeue, hfsc_request,
|
|
&hif->hif_classifier, acc_classify)) != 0)
|
|
(void)hfsc_detach(hif);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_if_detach(ap)
|
|
struct hfsc_interface *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
int error;
|
|
|
|
if ((hif = altq_lookup(ap->hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
if (ALTQ_IS_ENABLED(hif->hif_ifq))
|
|
altq_disable(hif->hif_ifq);
|
|
|
|
if ((error = altq_detach(hif->hif_ifq)))
|
|
return (error);
|
|
|
|
return hfsc_detach(hif);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_add_class(ap)
|
|
struct hfsc_add_class *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct hfsc_class *cl, *parent;
|
|
|
|
if ((hif = altq_lookup(ap->iface.hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((parent = clh_to_clp(hif, ap->parent_handle)) == NULL) {
|
|
if (ap->parent_handle == HFSC_ROOTCLASS_HANDLE)
|
|
parent = hif->hif_rootclass;
|
|
else
|
|
return (EINVAL);
|
|
}
|
|
|
|
if ((cl = hfsc_class_create(hif, &ap->service_curve, parent,
|
|
ap->qlimit, ap->flags)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
/* return a class handle to the user */
|
|
ap->class_handle = clp_to_clh(cl);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_delete_class(ap)
|
|
struct hfsc_delete_class *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct hfsc_class *cl;
|
|
|
|
if ((hif = altq_lookup(ap->iface.hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((cl = clh_to_clp(hif, ap->class_handle)) == NULL)
|
|
return (EINVAL);
|
|
|
|
return hfsc_class_destroy(cl);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_modify_class(ap)
|
|
struct hfsc_modify_class *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct hfsc_class *cl;
|
|
struct service_curve *rsc = NULL;
|
|
struct service_curve *fsc = NULL;
|
|
|
|
if ((hif = altq_lookup(ap->iface.hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((cl = clh_to_clp(hif, ap->class_handle)) == NULL)
|
|
return (EINVAL);
|
|
|
|
if (ap->sctype & HFSC_REALTIMESC)
|
|
rsc = &ap->service_curve;
|
|
if (ap->sctype & HFSC_LINKSHARINGSC)
|
|
fsc = &ap->service_curve;
|
|
|
|
return hfsc_class_modify(cl, rsc, fsc);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_add_filter(ap)
|
|
struct hfsc_add_filter *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct hfsc_class *cl;
|
|
|
|
if ((hif = altq_lookup(ap->iface.hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
if ((cl = clh_to_clp(hif, ap->class_handle)) == NULL)
|
|
return (EINVAL);
|
|
|
|
if (is_a_parent_class(cl)) {
|
|
#if 1
|
|
printf("hfsccmd_add_filter: not a leaf class!\n");
|
|
#endif
|
|
return (EINVAL);
|
|
}
|
|
|
|
return acc_add_filter(&hif->hif_classifier, &ap->filter,
|
|
cl, &ap->filter_handle);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_delete_filter(ap)
|
|
struct hfsc_delete_filter *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
|
|
if ((hif = altq_lookup(ap->iface.hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
return acc_delete_filter(&hif->hif_classifier,
|
|
ap->filter_handle);
|
|
}
|
|
|
|
static int
|
|
hfsccmd_class_stats(ap)
|
|
struct hfsc_class_stats *ap;
|
|
{
|
|
struct hfsc_if *hif;
|
|
struct hfsc_class *cl;
|
|
struct hfsc_basic_class_stats stats, *usp;
|
|
int n, nclasses, error;
|
|
|
|
if ((hif = altq_lookup(ap->iface.hfsc_ifname, ALTQT_HFSC)) == NULL)
|
|
return (EBADF);
|
|
|
|
ap->cur_time = read_machclk();
|
|
ap->hif_classes = hif->hif_classes;
|
|
ap->hif_packets = hif->hif_packets;
|
|
|
|
/* skip the first N classes in the tree */
|
|
nclasses = ap->nskip;
|
|
for (cl = hif->hif_rootclass, n = 0; cl != NULL && n < nclasses;
|
|
cl = hfsc_nextclass(cl), n++)
|
|
;
|
|
if (n != nclasses)
|
|
return (EINVAL);
|
|
|
|
/* then, read the next N classes in the tree */
|
|
nclasses = ap->nclasses;
|
|
usp = ap->stats;
|
|
for (n = 0; cl != NULL && n < nclasses; cl = hfsc_nextclass(cl), n++) {
|
|
|
|
get_class_stats(&stats, cl);
|
|
|
|
if ((error = copyout((caddr_t)&stats, (caddr_t)usp++,
|
|
sizeof(stats))) != 0)
|
|
return (error);
|
|
}
|
|
|
|
ap->nclasses = n;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void get_class_stats(sp, cl)
|
|
struct hfsc_basic_class_stats *sp;
|
|
struct hfsc_class *cl;
|
|
{
|
|
sp->class_id = cl->cl_id;
|
|
sp->class_handle = clp_to_clh(cl);
|
|
|
|
if (cl->cl_rsc != NULL) {
|
|
sp->rsc.m1 = sm2m(cl->cl_rsc->sm1);
|
|
sp->rsc.d = dx2d(cl->cl_rsc->dx);
|
|
sp->rsc.m2 = sm2m(cl->cl_rsc->sm2);
|
|
} else {
|
|
sp->rsc.m1 = 0;
|
|
sp->rsc.d = 0;
|
|
sp->rsc.m2 = 0;
|
|
}
|
|
if (cl->cl_fsc != NULL) {
|
|
sp->fsc.m1 = sm2m(cl->cl_fsc->sm1);
|
|
sp->fsc.d = dx2d(cl->cl_fsc->dx);
|
|
sp->fsc.m2 = sm2m(cl->cl_fsc->sm2);
|
|
} else {
|
|
sp->fsc.m1 = 0;
|
|
sp->fsc.d = 0;
|
|
sp->fsc.m2 = 0;
|
|
}
|
|
|
|
sp->total = cl->cl_total;
|
|
sp->cumul = cl->cl_cumul;
|
|
|
|
sp->d = cl->cl_d;
|
|
sp->e = cl->cl_e;
|
|
sp->vt = cl->cl_vt;
|
|
|
|
sp->qlength = qlen(cl->cl_q);
|
|
sp->xmit_cnt = cl->cl_stats.xmit_cnt;
|
|
sp->drop_cnt = cl->cl_stats.drop_cnt;
|
|
sp->period = cl->cl_stats.period;
|
|
|
|
sp->qtype = qtype(cl->cl_q);
|
|
#ifdef ALTQ_RED
|
|
if (q_is_red(cl->cl_q))
|
|
red_getstats(cl->cl_red, &sp->red[0]);
|
|
#endif
|
|
#ifdef ALTQ_RIO
|
|
if (q_is_rio(cl->cl_q))
|
|
rio_getstats((rio_t *)cl->cl_red, &sp->red[0]);
|
|
#endif
|
|
}
|
|
|
|
/* convert a class handle to the corresponding class pointer */
|
|
static struct hfsc_class *
|
|
clh_to_clp(hif, chandle)
|
|
struct hfsc_if *hif;
|
|
u_long chandle;
|
|
{
|
|
struct hfsc_class *cl;
|
|
|
|
cl = (struct hfsc_class *)chandle;
|
|
if (chandle != ALIGN(cl)) {
|
|
#if 1
|
|
printf("clh_to_cl: unaligned pointer %p\n", cl);
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
|
|
if (cl == NULL || cl->cl_handle != chandle || cl->cl_hif != hif)
|
|
return (NULL);
|
|
|
|
return (cl);
|
|
}
|
|
|
|
/* convert a class pointer to the corresponding class handle */
|
|
static u_long
|
|
clp_to_clh(cl)
|
|
struct hfsc_class *cl;
|
|
{
|
|
if (cl->cl_parent == NULL)
|
|
return (HFSC_ROOTCLASS_HANDLE); /* XXX */
|
|
return (cl->cl_handle);
|
|
}
|
|
|
|
#ifdef KLD_MODULE
|
|
|
|
static struct altqsw hfsc_sw =
|
|
{"hfsc", hfscopen, hfscclose, hfscioctl};
|
|
|
|
ALTQ_MODULE(altq_hfsc, ALTQT_HFSC, &hfsc_sw);
|
|
|
|
#endif /* KLD_MODULE */
|
|
|
|
#endif /* ALTQ_HFSC */
|