1 #ifndef __rack_bbr_common_h__ 2 #define __rack_bbr_common_h__ 3 /*- 4 * Copyright (c) 2016-2020 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 28 /* Common defines and such used by both RACK and BBR */ 29 /* Special values for mss accounting array */ 30 #define TCP_MSS_ACCT_JUSTRET 0 31 #define TCP_MSS_ACCT_SNDACK 1 32 #define TCP_MSS_ACCT_PERSIST 2 33 #define TCP_MSS_ACCT_ATIMER 60 34 #define TCP_MSS_ACCT_INPACE 61 35 #define TCP_MSS_ACCT_LATE 62 36 #define TCP_MSS_SMALL_SIZE_OFF 63 /* Point where small sizes enter */ 37 #define TCP_MSS_ACCT_SIZE 70 38 #define TCP_MSS_SMALL_MAX_SIZE_DIV (TCP_MSS_ACCT_SIZE - TCP_MSS_SMALL_SIZE_OFF) 39 40 #define DUP_ACK_THRESHOLD 3 41 42 /* Magic flags for tracing progress events */ 43 #define PROGRESS_DROP 1 44 #define PROGRESS_UPDATE 2 45 #define PROGRESS_CLEAR 3 46 #define PROGRESS_START 4 47 48 /* codes for just-return */ 49 #define CTF_JR_SENT_DATA 0 50 #define CTF_JR_CWND_LIMITED 1 51 #define CTF_JR_RWND_LIMITED 2 52 #define CTF_JR_APP_LIMITED 3 53 #define CTF_JR_ASSESSING 4 54 #define CTF_JR_PERSISTS 5 55 #define CTF_JR_PRR 6 56 57 /* Compat. */ 58 #define BBR_JR_SENT_DATA CTF_JR_SENT_DATA 59 #define BBR_JR_CWND_LIMITED CTF_JR_CWND_LIMITED 60 #define BBR_JR_RWND_LIMITED CTF_JR_RWND_LIMITED 61 #define BBR_JR_APP_LIMITED CTF_JR_APP_LIMITED 62 #define BBR_JR_ASSESSING CTF_JR_ASSESSING 63 #define BBR_JR_PERSISTS CTF_JR_PERSISTS 64 #define BBR_JR_PRR CTF_JR_PRR 65 66 /* RTT sample methods */ 67 #define USE_RTT_HIGH 0 68 #define USE_RTT_LOW 1 69 #define USE_RTT_AVG 2 70 71 #define PACE_MAX_IP_BYTES 65536 72 #define USECS_IN_SECOND 1000000 73 #define MSEC_IN_SECOND 1000 74 #define MS_IN_USEC 1000 75 #define USEC_TO_MSEC(x) (x / MS_IN_USEC) 76 #define TCP_TS_OVERHEAD 12 /* Overhead of having Timestamps on */ 77 78 /* Bits per second in bytes per second */ 79 #define FORTY_EIGHT_MBPS 6000000 /* 48 megabits in bytes */ 80 #define THIRTY_MBPS 3750000 /* 30 megabits in bytes */ 81 #define TWENTY_THREE_MBPS 2896000 /* 23 megabits in bytes */ 82 #define FIVETWELVE_MBPS 64000000 /* 512 megabits in bytes */ 83 #define ONE_POINT_TWO_MEG 150000 /* 1.2 megabits in bytes */ 84 85 #ifdef _KERNEL 86 /* We have only 7 bits in rack so assert its true */ 87 CTASSERT((PACE_TMR_MASK & 0x80) == 0); 88 int ctf_do_queued_segments(struct tcpcb *tp, int have_pkt); 89 uint32_t ctf_outstanding(struct tcpcb *tp); 90 uint32_t ctf_flight_size(struct tcpcb *tp, uint32_t rc_sacked); 91 int 92 ctf_drop_checks(struct tcpopt *to, struct mbuf *m, struct tcphdr *th, 93 struct tcpcb *tp, int32_t *tlenp, 94 int32_t *thf, int32_t *drop_hdrlen, int32_t *ret_val); 95 void ctf_ack_war_checks(struct tcpcb *tp); 96 97 void 98 ctf_do_dropafterack(struct mbuf *m, struct tcpcb *tp, 99 struct tcphdr *th, int32_t thflags, int32_t tlen, 100 int32_t *ret_val); 101 102 void 103 ctf_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, 104 struct tcphdr *th, int32_t rstreason, int32_t tlen); 105 void 106 ctf_do_drop(struct mbuf *m, struct tcpcb *tp); 107 108 int 109 ctf_process_rst(struct mbuf *m, struct tcphdr *th, 110 struct socket *so, struct tcpcb *tp); 111 112 void 113 ctf_challenge_ack(struct mbuf *m, struct tcphdr *th, 114 struct tcpcb *tp, uint8_t iptos, int32_t * ret_val); 115 116 int 117 ctf_ts_check(struct mbuf *m, struct tcphdr *th, 118 struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val); 119 120 int 121 ctf_ts_check_ac(struct tcpcb *tp, int32_t thflags); 122 123 void 124 ctf_calc_rwin(struct socket *so, struct tcpcb *tp); 125 126 void 127 ctf_do_dropwithreset_conn(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, 128 int32_t rstreason, int32_t tlen); 129 130 uint32_t 131 ctf_fixed_maxseg(struct tcpcb *tp); 132 133 void 134 ctf_log_sack_filter(struct tcpcb *tp, int num_sack_blks, struct sackblk *sack_blocks); 135 136 uint32_t 137 ctf_decay_count(uint32_t count, uint32_t decay_percentage); 138 139 int32_t 140 ctf_progress_timeout_check(struct tcpcb *tp, bool log); 141 142 #endif 143 #endif 144