1 #ifndef __pacer_timer_h__ 2 #define __pacer_timer_h__ 3 /*- 4 * Copyright (c) 2017 5 * Netflix Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * __FBSDID("$FreeBSD$"); 30 */ 31 /* Common defines and such used by both RACK and BBR */ 32 /* Special values for mss accounting array */ 33 #define TCP_MSS_ACCT_JUSTRET 0 34 #define TCP_MSS_ACCT_SNDACK 1 35 #define TCP_MSS_ACCT_PERSIST 2 36 #define TCP_MSS_ACCT_ATIMER 60 37 #define TCP_MSS_ACCT_INPACE 61 38 #define TCP_MSS_ACCT_LATE 62 39 #define TCP_MSS_SMALL_SIZE_OFF 63 /* Point where small sizes enter */ 40 #define TCP_MSS_ACCT_SIZE 70 41 #define TCP_MSS_SMALL_MAX_SIZE_DIV (TCP_MSS_ACCT_SIZE - TCP_MSS_SMALL_SIZE_OFF) 42 43 44 /* Magic flags to tell whats cooking on the pacing wheel */ 45 #define PACE_PKT_OUTPUT 0x01 /* Output Packets being paced */ 46 #define PACE_TMR_RACK 0x02 /* RACK timer running */ 47 #define PACE_TMR_TLP 0x04 /* TLP timer running */ 48 #define PACE_TMR_RXT 0x08 /* Retransmit timer running */ 49 #define PACE_TMR_PERSIT 0x10 /* Persists timer running */ 50 #define PACE_TMR_KEEP 0x20 /* Keep alive timer running */ 51 #define PACE_TMR_DELACK 0x40 /* Delayed ack timer running */ 52 #define PACE_TMR_MASK (PACE_TMR_KEEP|PACE_TMR_PERSIT|PACE_TMR_RXT|PACE_TMR_TLP|PACE_TMR_RACK|PACE_TMR_DELACK) 53 54 /* Magic flags for tracing progress events */ 55 #define PROGRESS_DROP 1 56 #define PROGRESS_UPDATE 2 57 #define PROGRESS_CLEAR 3 58 #define PROGRESS_START 4 59 60 61 /* RTT sample methods */ 62 #define USE_RTT_HIGH 0 63 #define USE_RTT_LOW 1 64 #define USE_RTT_AVG 2 65 66 #ifdef _KERNEL 67 /* We have only 7 bits in rack so assert its true */ 68 CTASSERT((PACE_TMR_MASK & 0x80) == 0); 69 #endif 70 #endif 71