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