--- /dev/null
+/*
+ * Copyright (c) 2011-2012 Apple Inc. All rights reserved.
+ *
+ * @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, 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@
+ */
+
+#ifndef _NET_CLASSQ_CLASSQ_SFB_H_
+#define _NET_CLASSQ_CLASSQ_SFB_H_
+
+#ifdef PRIVATE
+#ifdef BSD_KERNEL_PRIVATE
+#include <net/classq/if_classq.h>
+#include <stdbool.h>
+#include <sys/time.h>
+#endif /* BSD_KERNEL_PRIVATE */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SFB_FP_SHIFT 14 /* fixed-point shift (Q14) */
+#define SFB_LEVELS 2 /* L */
+#define SFB_BINS_SHIFT 5
+#define SFB_BINS (1 << SFB_BINS_SHIFT) /* N */
+
+struct sfbstats {
+ u_int64_t drop_early;
+ u_int64_t drop_pbox;
+ u_int64_t drop_queue;
+ u_int64_t marked_packets;
+ u_int64_t pbox_packets;
+ u_int64_t pbox_time;
+ u_int64_t hold_time;
+ u_int64_t dequeue_avg;
+ u_int64_t rehash_intval;
+ u_int64_t num_rehash;
+ u_int64_t null_flowhash;
+ u_int64_t flow_controlled;
+ u_int64_t flow_feedback;
+};
+
+struct sfbbinstats {
+ int16_t pmark; /* marking probability in Q format */
+ u_int16_t pkts; /* number of packets */
+};
+
+struct sfb_stats {
+ u_int32_t allocation;
+ u_int32_t dropthresh;
+ u_int32_t clearpkts;
+ u_int32_t current;
+ struct sfbstats sfbstats;
+ struct sfbbins {
+ struct sfbbinstats stats[SFB_LEVELS][SFB_BINS];
+ } binstats[2] __attribute__((aligned(8)));
+};
+
+#ifdef BSD_KERNEL_PRIVATE
+struct sfb_bin_fcentry {
+ SLIST_ENTRY(sfb_bin_fcentry) fce_link;
+ u_int32_t fce_flowhash;
+};
+
+SLIST_HEAD(sfb_fc_list, sfb_bin_fcentry);
+
+struct sfb_bins {
+ u_int32_t fudge;
+ struct sfbbinstats stats[SFB_LEVELS][SFB_BINS];
+ struct timespec freezetime[SFB_LEVELS][SFB_BINS];
+};
+
+/* SFB flags */
+#define SFBF_ECN4 0x01 /* use packet marking for IPv4 packets */
+#define SFBF_ECN6 0x02 /* use packet marking for IPv6 packets */
+#define SFBF_ECN (SFBF_ECN4 | SFBF_ECN6)
+#define SFBF_FLOWCTL 0x04 /* enable flow control advisories */
+#define SFBF_SUSPENDED 0x1000 /* queue is suspended */
+
+#define SFBF_USERFLAGS \
+ (SFBF_ECN4 | SFBF_ECN6 | SFBF_FLOWCTL)
+
+typedef struct sfb {
+ /* variables for internal use */
+ u_int32_t sfb_flags; /* SFB flags */
+ u_int32_t sfb_qlim;
+ u_int32_t sfb_qid;
+ u_int16_t sfb_allocation;
+ u_int16_t sfb_drop_thresh;
+ u_int32_t sfb_clearpkts;
+ u_int64_t sfb_eff_rate; /* last known effective rate */
+ struct timespec sfb_getqtime; /* last dequeue timestamp */
+ struct timespec sfb_holdtime; /* random holdtime in nsec */
+ struct ifnet *sfb_ifp; /* back pointer to ifnet */
+
+ /* moving hash function */
+ struct timespec sfb_hinterval; /* random reset interval in sec */
+ struct timespec sfb_nextreset; /* reset deadline */
+
+ /* penalty box */
+ struct timespec sfb_pboxtime; /* random pboxtime in nsec */
+ struct timespec sfb_pboxfreeze;
+
+ /* B[L][N] bins (2 sets: current and warm-up) */
+ u_int32_t sfb_current; /* current set (0 or 1) */
+ struct sfb_bins (*sfb_bins)[2];
+
+ /* Flow control lists for current set */
+ struct sfb_fc_list (*sfb_fc_lists)[SFB_BINS];
+
+ /* statistics */
+ struct sfbstats sfb_stats __attribute__((aligned(8)));
+} sfb_t;
+
+extern void sfb_init(void);
+extern struct sfb *sfb_alloc(struct ifnet *, u_int32_t, u_int32_t, u_int32_t);
+extern void sfb_destroy(struct sfb *);
+extern int sfb_addq(struct sfb *, class_queue_t *, struct mbuf *,
+ struct pf_mtag *);
+extern struct mbuf *sfb_getq(struct sfb *, class_queue_t *);
+extern void sfb_purgeq(struct sfb *, class_queue_t *, u_int32_t,
+ u_int32_t *, u_int32_t *);
+extern void sfb_getstats(struct sfb *, struct sfb_stats *);
+extern void sfb_updateq(struct sfb *, cqev_t);
+extern int sfb_suspendq(struct sfb *, class_queue_t *, boolean_t);
+#endif /* BSD_KERNEL_PRIVATE */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* PRIVATE */
+#endif /* _NET_CLASSQ_CLASSQ_SFB_H_ */
projects / apple / xnu.git / blobdiff