1 #ifndef __rack_bbr_common_h__ 2 #define __rack_bbr_common_h__ 3 /*- 4 * Copyright (c) 2017-9 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 30 /* XXXLAS: Couple STATS to NETFLIX_STATS until stats(3) is fully upstreamed. */ 31 #ifndef NETFLIX_STATS 32 #undef STATS 33 #endif 34 35 /* Common defines and such used by both RACK and BBR */ 36 /* Special values for mss accounting array */ 37 #define TCP_MSS_ACCT_JUSTRET 0 38 #define TCP_MSS_ACCT_SNDACK 1 39 #define TCP_MSS_ACCT_PERSIST 2 40 #define TCP_MSS_ACCT_ATIMER 60 41 #define TCP_MSS_ACCT_INPACE 61 42 #define TCP_MSS_ACCT_LATE 62 43 #define TCP_MSS_SMALL_SIZE_OFF 63 /* Point where small sizes enter */ 44 #define TCP_MSS_ACCT_SIZE 70 45 #define TCP_MSS_SMALL_MAX_SIZE_DIV (TCP_MSS_ACCT_SIZE - TCP_MSS_SMALL_SIZE_OFF) 46 47 #define DUP_ACK_THRESHOLD 3 48 49 /* Magic flags for tracing progress events */ 50 #define PROGRESS_DROP 1 51 #define PROGRESS_UPDATE 2 52 #define PROGRESS_CLEAR 3 53 #define PROGRESS_START 4 54 55 /* codes for just-return */ 56 #define CTF_JR_SENT_DATA 0 57 #define CTF_JR_CWND_LIMITED 1 58 #define CTF_JR_RWND_LIMITED 2 59 #define CTF_JR_APP_LIMITED 3 60 #define CTF_JR_ASSESSING 4 61 #define CTF_JR_PERSISTS 5 62 #define CTF_JR_PRR 6 63 64 /* Compat. */ 65 #define BBR_JR_SENT_DATA CTF_JR_SENT_DATA 66 #define BBR_JR_CWND_LIMITED CTF_JR_CWND_LIMITED 67 #define BBR_JR_RWND_LIMITED CTF_JR_RWND_LIMITED 68 #define BBR_JR_APP_LIMITED CTF_JR_APP_LIMITED 69 #define BBR_JR_ASSESSING CTF_JR_ASSESSING 70 #define BBR_JR_PERSISTS CTF_JR_PERSISTS 71 #define BBR_JR_PRR CTF_JR_PRR 72 73 /* RTT sample methods */ 74 #define USE_RTT_HIGH 0 75 #define USE_RTT_LOW 1 76 #define USE_RTT_AVG 2 77 78 #define PACE_MAX_IP_BYTES 65536 79 #define USECS_IN_SECOND 1000000 80 #define MSEC_IN_SECOND 1000 81 #define MS_IN_USEC 1000 82 #define USEC_TO_MSEC(x) (x / MS_IN_USEC) 83 #define TCP_TS_OVERHEAD 12 /* Overhead of having Timestamps on */ 84 85 /* Bits per second in bytes per second */ 86 #define FORTY_EIGHT_MBPS 6000000 /* 48 megabits in bytes */ 87 #define THIRTY_MBPS 3750000 /* 30 megabits in bytes */ 88 #define TWENTY_THREE_MBPS 2896000 89 #define FIVETWELVE_MBPS 64000000 /* 512 megabits in bytes */ 90 #define ONE_POINT_TWO_MEG 150000 /* 1.2 megabits in bytes */ 91 92 #ifdef _KERNEL 93 /* We have only 7 bits in rack so assert its true */ 94 CTASSERT((PACE_TMR_MASK & 0x80) == 0); 95 #ifdef KERN_TLS 96 uint32_t ctf_get_opt_tls_size(struct socket *so, uint32_t rwnd); 97 #endif 98 int 99 ctf_process_inbound_raw(struct tcpcb *tp, struct socket *so, 100 struct mbuf *m, int has_pkt); 101 int 102 ctf_do_queued_segments(struct socket *so, struct tcpcb *tp, int have_pkt); 103 uint32_t ctf_outstanding(struct tcpcb *tp); 104 uint32_t ctf_flight_size(struct tcpcb *tp, uint32_t rc_sacked); 105 int 106 ctf_drop_checks(struct tcpopt *to, struct mbuf *m, 107 struct tcphdr *th, struct tcpcb *tp, int32_t * tlenp, int32_t * thf, 108 int32_t * drop_hdrlen, int32_t * ret_val); 109 void 110 ctf_do_dropafterack(struct mbuf *m, struct tcpcb *tp, 111 struct tcphdr *th, int32_t thflags, int32_t tlen, int32_t * ret_val); 112 void 113 ctf_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, 114 struct tcphdr *th, int32_t rstreason, int32_t tlen); 115 void 116 ctf_do_drop(struct mbuf *m, struct tcpcb *tp); 117 118 int 119 ctf_process_rst(struct mbuf *m, struct tcphdr *th, 120 struct socket *so, struct tcpcb *tp); 121 122 void 123 ctf_challenge_ack(struct mbuf *m, struct tcphdr *th, 124 struct tcpcb *tp, int32_t * ret_val); 125 126 int 127 ctf_ts_check(struct mbuf *m, struct tcphdr *th, 128 struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val); 129 130 void 131 ctf_calc_rwin(struct socket *so, struct tcpcb *tp); 132 133 void 134 ctf_do_dropwithreset_conn(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, 135 int32_t rstreason, int32_t tlen); 136 137 uint32_t 138 ctf_fixed_maxseg(struct tcpcb *tp); 139 140 void 141 ctf_log_sack_filter(struct tcpcb *tp, int num_sack_blks, struct sackblk *sack_blocks); 142 143 uint32_t 144 ctf_decay_count(uint32_t count, uint32_t decay_percentage); 145 146 #endif 147 #endif 148