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read_bbrlog.c
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#include <sys/types.h>
#include <sys/callout.h>
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/tree.h>
#include <sys/tim_filter.h>
#include <sys/osd.h>
#include <getopt.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#define _WANT_INPCB
#include <netinet/in_pcb.h>
#include <netinet/tcp_hpts.h>
#include <dev/tcp_log/tcp_log_dev.h>
#include <netinet/tcp_log_buf.h>
#include <netinet/tcp_seq.h>
#define _WANT_TCPCB
#include <netinet/tcp_var.h>
#include <netinet/tcp_hpts.h>
#include <netinet/tcp_stacks/sack_filter.h>
#include <netinet/tcp_stacks/tcp_bbr.h>
#include <netinet/tcp_stacks/tcp_rack.h>
#include <netinet/tcp_stacks/rack_bbr_common.h>
#include <net/route.h>
#include <assert.h>
static const char *prurequests[] = {
"ATTACH", "DETACH", "BIND", "LISTEN",
"CONNECT", "ACCEPT", "DISCONNECT", "SHUTDOWN",
"RCVD", "SEND", "ABORT", "CONTROL",
"SENSE", "RCVOOB", "SENDOOB", "SOCKADDR",
"PEERADDR", "CONNECT2", "FASTTIMO", "SLOWTIMO",
"PROTORCV", "PROTOSEND", "SEND_EOF", "SOSETLABEL",
"CLOSE", "FLUSH",
};
#include <bbparse.h>
static uint32_t lowest_delta = 0xffffffff;
static uint32_t highest_delta = 0;
static int32_t showExtraInfo = 0;
static int32_t file_count_limit = 0;
static int32_t file_count_at = 0;
static int32_t use_relative_seq = 0;
static int32_t change_tracking = 0;
static void
print_pace_size(const struct tcp_log_buffer *, const struct tcp_log_bbr *);
static FILE *dump_out_sack=NULL;
#define MAX_TYPES TCP_LOG_END
static int extra_print = 0;
static int number_flow = 0;
static uint32_t record_num_start = 0;
static uint32_t record_num_end = 0;
static uint8_t num_start_set = 0;
static uint8_t num_end_set = 0;
static uint8_t tag_dumped = 0;
static char log_tag[TCP_LOG_TAG_LEN];
static uint32_t time_in_hot = 0;
static int print_out_the_time = 0;
static int show_all_messages=1;
static uint32_t out_count = 0;
static int display_file_names = 0;
static uint32_t warn_behind=0;
static int irs = 0;
static int irs_set = 0;
static const char *dirname = NULL;
static uint32_t epoch_lost = 0;
static uint32_t epoch_delivered = 0;
static uint32_t first_time=0;
static int first_time_set=0;
static int bbr_first_time_set=0;
static int time_is_relative = 0;
static const struct tcp_log_header *lh = NULL;
static int display_wallclock_time = 0;
static int use_monolithic_time = 0;
static uint32_t prev_sent_bytes = 0;
static uint32_t prev_sn = 0;
static uint64_t prev_sent_time = 0;
static int clear_to_print = 1;
/*#define BBR_RED_BW_CONGSIG 0 We enter recovery and set using b/w */
/*#define BBR_RED_BW_RATECAL 1 We are calculating the loss rate */
/*#define BBR_RED_BW_USELRBW 2 We are dropping the lower b/w with cDR*/
/*#define BBR_RED_BW_SETHIGHLOSS 3 We have set our highloss value at exit from probe-rtt */
/*#define BBR_RED_BW_PE_CLREARLY 4 We have decided to clear the reduction early */
/*#define BBR_RED_BW_PE_CLAFDEL 5 We are clearing it on schedule delayed */
/*#define BBR_RED_BW_REC_ENDCLL 6 Recover exits save high if needed an clear to start measuring */
/*#define BBR_RED_BW_PE_NOEARLY_OUT 7 Set pkt epoch judged that we do not get out of jail early */
static const char *tcp_accounting_names[] = {
"ACK_BEHIND",
"ACK_SACK",
"ACK_CUMACK",
"ACK_CUMACK_SACK",
"ACK_DUPACK",
"ACK_RWND",
"SND_BLOCKED",
"SND_LIMITED",
"SND_OUT_DATA",
"SND_OUT_ACK",
"SND_OUT_FAIL",
"CNT_OF_MSS_OUT",
"CNT_OF_ACKS_IN"
};
static const char *tcp_cycle_names[] = {
"ACK_BEHIND",
"ACK_SACK",
"ACK_CUMACK",
"ACK_CUMACK_SACK",
"ACK_DUPACK",
"ACK_RWND",
"SND_BLOCKED",
"SND_LIMITED",
"SND_OUT_DATA",
"SND_OUT_ACK",
"SND_OUT_FAIL",
"CYC_HANDLE_MAP",
"CYC_HANDLE_ACK"
};
static const char *map_chg_names[] = {
"None",
"Merge",
"Split",
"New",
"SACK_M1",
"SACK_M2",
"SACK_M3",
"SACK_M4",
"SACK_M5",
"Free",
"Trim Head",
"None"
};
#define MAX_RED_BW_REASONS 9
static const char *red_bw_reasons[MAX_RED_BW_REASONS] = {
"Recovery Begins",
"Calculate loss rate",
"Adopt lower red b/w",
"ProbeRTT sets new threshold",
"Clear reduction early",
"Clear reduction on sched",
"Exiting recovery",
"No early out",
"Unknown"
};
#define PACE_TMR_DELACK 0x01 /* Delayed ack timer running */
#define PACE_TMR_RACK 0x02 /* RACK timer running */
#define PACE_TMR_TLP 0x04 /* TLP timer running */
#define PACE_TMR_RXT 0x08 /* Retransmit timer running */
#define PACE_TMR_PERSIT 0x10 /* Persists timer running */
#define PACE_TMR_KEEP 0x20 /* Keep alive timer running */
#define PACE_PKT_OUTPUT 0x40 /* Output Packets being paced */
#define PACE_TMR_MASK (PACE_TMR_KEEP|PACE_TMR_PERSIT|PACE_TMR_RXT|PACE_TMR_TLP|PACE_TMR_RACK|PACE_TMR_DELACK)
static uint64_t under_256 = 0;
static uint64_t over_256 = 0;
static uint64_t at_256 = 0;
static uint64_t under_drain = 0;
static uint64_t under_rtt = 0;
static uint64_t under_subdr = 0;
static uint64_t time_in_state[3];
#define STATE_SS 0
#define STATE_CA 1
#define STATE_REC 2
static uint32_t time_entered = 0;
static int32_t gp_state = 0;
static void
add_time_to_state(uint32_t now, int new_state)
{
if (TSTMP_GT(now, time_entered))
time_in_state[gp_state] += (now - time_entered);
gp_state = new_state;
time_entered = now;
}
static void inline
print_out_space(FILE *outp)
{
fprintf(outp, " ");
}
static struct timeval earliest_time;
static struct timeval connection_begin_time;
static struct timeval last_time;
static int early_filled = 0;
static uint64_t msg_types_list[MAX_TYPES];
static uint16_t last_major_state = 0;
static uint16_t last_minor_state = 0;
static uint64_t total_missed_records = 0;
static const char *log_names[MAX_TYPES] = {
"UNKNOWN ",
"IN ", /* Incoming packet 1 */
"PKT_OUT ", /* Transmit (without other event) 2 */
"RTO ", /* Retransmit timeout 3 */
"SOWAKE ", /* We wokeup a socket buffer 4 */
"BAD_RETRAN", /* Detected bad retransmission 5 */
"PRR ", /* Doing PRR 6 */
"REORDER ", /* Detected reorder 7 */
"PACER ", /* Pacer sending a packet 8 */
"BBRUPD ", /* We updated BBR info 9 */
"BBRSND ", /* We did a slot calculation and sending is done 10 */
"ACKCLEAR ", /* A ack clears all outstanding 11 */
"INQUEUE ", /* The tcb had a packet input to it 12 */
"TIMERSTAR ", /* Start a timer 13 */
"TIMERCANC ", /* Cancel a timer 14 */
"ENTREC ", /* Entered recovery 15 */
"EXITREC ", /* Exited recovery 16 */
"LOG_CWND ", /* Cwnd change 17 */
"BWSAMP ", /* LT B/W sample has been made 18 */
"MSGSIZE ", /* We received a EMSGSIZE error 19 */
"BBRRTT ", /* BBR RTT is updated 20 */
"JUSTRET ", /* We just returned out of output 21 */
"STATE ", /* A BBR state change occured 22 */
"PKT_EPOCH ", /* A packet epoch occured 23 */
"PERSIST ", /* We enter/exit persists 24 */
"FLOWEND ", /* end of a flow 25 */
"RTO ", /* a BBR timeout mark 26 */
"DOSEG_DONE", /* End of pacer do segment 27 */
"EXIT_GAIN ", /* pacer do_segment completes 28 */
"THRESH_CALC",/* log the calculation routine 29 */
"MAP_CHGS", /* Map changes to the sendmap 30 */
"USERSEND ", /* User level sends data 31 */
"RSM_CLEAR ", /* Unused 32 */
"STATE_TARGET", /* Set of state target 33 */
"EPOCH_TIME", /* A timed based Epoch occured 34 */
"LOG_TO_PRO", /* A to was processed 35 */
"TSO_SZ_UPD", /* Update the TSO size 36 */
"PACERDIAG ", /* A pacer diag msg 37 */
"RWND COMP ", /* Log a low gain event 38 */
"PROGRESS ", /* A progress event 39 */
"TCP_OPTION", /* A tcp option is set 40 */
"BBR_LOG_TIMERPREP", /* timing calc check 41 */
"BBR_ENOBUF_JMP", /* 42 */
"BBR_PACING_CALC", /* 43 */
"BBR_RTT_SHRINKS", /* 44 */
"BBR_LOG_BW_RED_EV", /* 45 */
"BBR_STARTUP_LOG", /* 46 */
"TCP_LOG_RTT", /* 47 */
"BBR_SETTINGS", /* 48 */
"BBR_SRTT_GAIN_EVENT", /* 49 */
"TCP_LOG_REASS", /* 50 */
"TCP_PACE_SIZE", /* 51 */
"BBR_TCP_HDWR_PACE", /* 52 */
"BBR_LOG_TSTMP_VAL", /* 53 */
"TCP_LOG_CONNEND", /* 54 */
"TCP_LRO_LOG", /* 55 */
"SACK_FILTER_RESULT", /* 56 */
"TCP_SAD_DETECTION", /* 57 */
"TCP_TIMELY_WORK", /* 58 */
"USER_LOG ", /* 59 */
"SENDFILE ", /* 60 */
"TCP_LOG_REQ_T", /* 61 */
"TCP_ACCOUNTING", /* 62 */
"TCP_LOG_FSB", /* 63 */
"RACK_DSACK_HANDLING", /* 64 */
"TCP_HYSTART", /* 65 */
"TCP_CHG_QUERY", /* 66 */
"TCP_RACK_LOG_COLLAPSE", /* 67 */
"RACK_TP_TRIGGERED", /* 68 */
"TCP_HYBRID_PACING", /* 69 */
"TCP_LOG_PRU" /* 70 */
};
static uint32_t time_last_setting = 0;
static int last_set_set=0;
static uint32_t last_ack_time = 0;
static uint32_t last_spa_seen = 0;
static uint32_t last_out_time = 0;
static uint32_t last_input_time = 0;
static uint32_t last_pg_chg=0;
static uint32_t opg=0;
static uint32_t last_evt_time=0;
static uint64_t time_avail_zero = 0;
static uint32_t time_saw_avail_zero = 0;
static uint32_t avail_is_zero = 1;
static uint32_t saw_ltbw_set = 0;
#define REASON_MAX 10
static const char *lt_bw_reasons[REASON_MAX] = {
"Stop using lt bw", /* 0 */
"Begin sampling lt bw", /* 1 */
"App Limit reset sample", /* 2 */
"Been too long reset sampling", /* 3 */
"Being Policed use lt bw", /* 4 */
"Saved a lt bw sample", /* 5 */
"Not enough time or loss", /* 6 */
"False detection negative", /* 7 */
"False detection postive", /* 8 */
"Unknown" /* 9 */
};
static FILE *out = NULL;
#include <netinet/tcp_stacks/sack_filter.h>
#include <netinet/tcp_stacks/tcp_bbr.h>
static const char *
evt_name(int id)
{
if (id < 0 || id >= MAX_TYPES) {
static char log_name_foo[65];
sprintf(log_name_foo, "Unknown:%d",
id);
return(log_name_foo);
}
return(log_names[id]);
}
static char *
display_bw(uint64_t bw, int uniq_cpy)
{
static char human_bw[256];
double bw_d;
bw_d = bw * 8.0;
if (bw_d >= 1000000000.0) {
sprintf(human_bw, "%.2f Gbps", (bw_d/1000000000.0));
} else if (bw_d >= 1000000.0) {
sprintf(human_bw, "%.2f Mbps", (bw_d/1000000.0));
} else if (bw_d >= 1000.0) {
sprintf(human_bw, "%.2f kbps", (bw_d/1000.0));
} else {
sprintf(human_bw, "%.2f bps", bw_d);
}
if (uniq_cpy) {
char *cp;
cp = malloc(256);
strcpy(cp, human_bw);
return(cp);
} else {
return(human_bw);
}
}
static void
display_tcp_rto(const struct tcp_log_buffer *l)
{
int what;
int which;
const char *timer_types[] = {
"TT_REXMT",
"TT_PERSIST",
"TT_KEEP",
"TT_2MSL",
"TT_DELACK",
"TT_N"
};
const char *timer_events[] = {
"TT_PROCESSING",
"TT_PROCESSED",
"TT_STARTING",
"TT_STOPPING",
"TT_UNK"
};
what = (l->tlb_flex1 >> 8);
which = (l->tlb_flex1 & 0xff);
if (which > 5)
which = 5;
if (what > 4)
what = 4;
fprintf(out, "Type:%s Event:%s\n",
timer_types[which],
timer_events[what]);
}
static int cg_tk_filled = 0;
static struct tcp_log_buffer last_buffer;
static const char *
show_diff(uint32_t old, uint32_t new)
{
static char print_buffer[100];
uint32_t delta;
if (old > new) {
delta = old - new;
sprintf(print_buffer, "(-%u)",
delta);
} else {
delta = new - old;
sprintf(print_buffer, "(+%u)",
delta);
}
return ((const char *)print_buffer);
}
static void
change_tracking_check(const struct tcp_log_buffer *l)
{
if (cg_tk_filled == 0) {
cg_tk_filled = 1;
memcpy(&last_buffer, l, sizeof(struct tcp_log_buffer));
return;
}
/* Check and display any changes in the current log vs the previous */
if (last_buffer.tlb_stackid != l->tlb_stackid) {
print_out_space(out);
fprintf(out, "CHG tlb_stackid OLD:%u NEW:%u\n",
last_buffer.tlb_stackid,l->tlb_stackid);
}
if (last_buffer.tlb_state != l->tlb_state) {
print_out_space(out);
fprintf(out, "CHG tlb_state OLD:%u NEW:%u\n",
last_buffer.tlb_state, l->tlb_state);
}
if (last_buffer.tlb_flags != l->tlb_flags) {
print_out_space(out);
fprintf(out, "CHG tlb_flags OLD:0x%x NEW:0x%x\n",
last_buffer.tlb_flags, l->tlb_flags);
}
if (last_buffer.tlb_snd_una != l->tlb_snd_una) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_una OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_una, l->tlb_snd_una,
show_diff(last_buffer.tlb_snd_una, l->tlb_snd_una));
}
if (last_buffer.tlb_snd_max != l->tlb_snd_max) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_max OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_max, l->tlb_snd_max,
show_diff(last_buffer.tlb_snd_max, l->tlb_snd_max));
}
if (last_buffer.tlb_snd_cwnd != l->tlb_snd_cwnd) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_cwnd OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_cwnd, l->tlb_snd_cwnd,
show_diff(last_buffer.tlb_snd_cwnd, l->tlb_snd_cwnd));
}
if (last_buffer.tlb_snd_nxt != l->tlb_snd_nxt) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_nxt OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_nxt, l->tlb_snd_nxt,
show_diff(last_buffer.tlb_snd_nxt, l->tlb_snd_nxt));
}
if (last_buffer.tlb_snd_recover != l->tlb_snd_recover) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_recover OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_recover, l->tlb_snd_recover,
show_diff(last_buffer.tlb_snd_recover, l->tlb_snd_recover));
}
if (last_buffer.tlb_snd_wnd != l->tlb_snd_wnd) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_wnd OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_wnd, l->tlb_snd_wnd,
show_diff(last_buffer.tlb_snd_wnd, l->tlb_snd_wnd));
}
if (last_buffer.tlb_snd_ssthresh != l->tlb_snd_ssthresh) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_ssthresh OLD:%u NEW:%u %s\n",
last_buffer.tlb_snd_ssthresh, l->tlb_snd_ssthresh,
show_diff(last_buffer.tlb_snd_ssthresh, l->tlb_snd_ssthresh));
}
if (last_buffer.tlb_srtt != l->tlb_srtt) {
print_out_space(out);
fprintf(out, "CHG tlb_srtt OLD:%u NEW:%u %s\n",
last_buffer.tlb_srtt, l->tlb_srtt,
show_diff(last_buffer.tlb_srtt, l->tlb_srtt));
}
if (last_buffer.tlb_rttvar != l->tlb_rttvar) {
print_out_space(out);
fprintf(out, "CHG tlb_rttvar OLD:%u NEW:%u %s\n",
last_buffer.tlb_rttvar, l->tlb_rttvar,
show_diff(last_buffer.tlb_rttvar, l->tlb_rttvar));
}
if (last_buffer.tlb_rcv_up != l->tlb_rcv_up) {
print_out_space(out);
fprintf(out, "CHG tlb_rcv_up OLD:%u NEW:%u\n",
last_buffer.tlb_rcv_up, l->tlb_rcv_up);
}
if (last_buffer.tlb_rcv_adv != l->tlb_rcv_adv) {
print_out_space(out);
fprintf(out, "CHG tlb_rcv_adv OLD:%u NEW:%u %s\n",
last_buffer.tlb_rcv_adv, l->tlb_rcv_adv,
show_diff(last_buffer.tlb_rcv_adv, l->tlb_rcv_adv));
}
if (last_buffer.tlb_flags2 != l->tlb_flags2) {
print_out_space(out);
fprintf(out, "CHG tlb_flags2 OLD:0x%x NEW:0x%x\n",
last_buffer.tlb_flags2, l->tlb_flags2);
}
if (last_buffer.tlb_rcv_nxt != l->tlb_rcv_nxt) {
print_out_space(out);
fprintf(out, "CHG tlb_rcv_nxt OLD:%u NEW:%u %s\n",
last_buffer.tlb_rcv_nxt, l->tlb_rcv_nxt,
show_diff(last_buffer.tlb_rcv_nxt, l->tlb_rcv_nxt));
}
if (last_buffer.tlb_rcv_wnd != l->tlb_rcv_wnd) {
print_out_space(out);
fprintf(out, "CHG tlb_rcv_wnd OLD:%u NEW:%u %s\n",
last_buffer.tlb_rcv_wnd, l->tlb_rcv_wnd,
show_diff(last_buffer.tlb_rcv_wnd, l->tlb_rcv_wnd));
}
if (last_buffer.tlb_dupacks != l->tlb_dupacks) {
print_out_space(out);
fprintf(out, "CHG tlb_dupacks OLD:%u NEW:%u %s\n",
last_buffer.tlb_dupacks, l->tlb_dupacks,
show_diff(last_buffer.tlb_dupacks, l->tlb_dupacks));
}
if (last_buffer.tlb_segqlen != l->tlb_segqlen) {
print_out_space(out);
fprintf(out, "CHG tlb_segqlen OLD:%u NEW:%u %s\n",
last_buffer.tlb_segqlen, l->tlb_segqlen,
show_diff(last_buffer.tlb_segqlen, l->tlb_segqlen));
}
if (last_buffer.tlb_snd_numholes != l->tlb_snd_numholes) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_numholes OLD:%u NEW:%u\n",
last_buffer.tlb_snd_numholes, l->tlb_snd_numholes);
}
if (last_buffer.tlb_snd_scale != l->tlb_snd_scale) {
print_out_space(out);
fprintf(out, "CHG tlb_snd_scale OLD:%u NEW:%u\n",
last_buffer.tlb_snd_scale, l->tlb_snd_scale);
}
if (last_buffer.tlb_rcv_scale != l->tlb_rcv_scale) {
print_out_space(out);
fprintf(out, "CHG tlb_rcv_scale OLD:%u NEW:%u\n",
last_buffer.tlb_rcv_scale, l->tlb_rcv_scale);
}
memcpy(&last_buffer, l, sizeof(struct tcp_log_buffer));
}
static char *
get_timer_mask(uint32_t tmask)
{
static char mask_value[256];
int outr=0;
memset(mask_value, 0, sizeof(mask_value));
if (tmask & PACE_TMR_DELACK) {
strcat(mask_value, "DACK");
outr = 1;
} else if (tmask & PACE_TMR_RACK) {
strcat(mask_value, "RACK");
outr = 1;
} else if (tmask & PACE_TMR_TLP) {
strcat(mask_value, "TLP");
outr = 1;
} else if (tmask & PACE_TMR_RXT) {
strcat(mask_value, "RXT");
outr = 1;
} else if (tmask & PACE_TMR_PERSIT) {
strcat(mask_value, "PER");
outr = 1;
} else if (tmask & PACE_TMR_KEEP) {
strcat(mask_value, "KEEP");
outr = 1;
}
if (tmask & PACE_PKT_OUTPUT) {
if (outr)
strcat(mask_value, " & OUTPUT");
else
strcat(mask_value, "OUTPUT");
outr++;
}
if (outr == 0)
strcat(mask_value, "NONE");
return(mask_value);
}
static char *
translate_flags(uint8_t flags)
{
static char flagbuf[256];
memset(flagbuf, 0, sizeof(flagbuf));
int buf_at = 0;
if (flags & TH_FIN) {
strcat(flagbuf, "FIN");
buf_at += 3;
}
if (flags & TH_SYN) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "SYN");
buf_at += 3;
}
if (flags & TH_RST) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "RST");
buf_at += 3;
}
if (flags & TH_PUSH) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "PUS");
buf_at += 3;
}
if (flags & TH_ACK) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "ACK");
buf_at += 3;
}
if (flags & TH_URG) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "URG");
buf_at += 3;
}
if (flags & TH_ECE) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "ECE");
buf_at += 3;
}
if (flags & TH_CWR) {
if (buf_at)
strcat(flagbuf, "|");
strcat(flagbuf, "CWR");
buf_at += 3;
}
if (buf_at == 0)
strcat(flagbuf, "NON");
return(flagbuf);
}
static uint64_t
bbr_get_bw_delay_prod(uint64_t rtt, uint64_t bw)
{
/*
* Calculate the bytes in flight needed give the bw (in bytes per
* second) and the specifyed rtt in useconds. We need to put out the
* returned value per RTT to match that rate. Gain will normaly
* raise it up from there.
*/
uint64_t usec_per_sec, bdp;
usec_per_sec = 1000000;
bdp = (rtt * bw)/usec_per_sec;
return (bdp);
}
static uint32_t
bbr_get_target_cwnd(uint64_t bw, uint64_t rtt, uint32_t gain)
{
uint64_t bdp;
uint32_t cwnd;
#ifdef DO_ROUND
uint32_t mss, even_targ;
#endif
/* Get the bdp from the two values */
bdp = bbr_get_bw_delay_prod(rtt, bw);
/* Now apply the gain */
cwnd = (uint32_t) (((bdp * ((uint64_t) gain)) + (uint64_t) (BBR_UNIT - 1)) / ((uint64_t) BBR_UNIT));
/* round up to then next mss boundary */
#ifdef DO_ROUND
mss = (bbr->rc_tp->t_maxseg - bbr->r_ctl.rc_last_options);
even_targ = (cwnd + (mss - 1)) / mss;
/* Lets make sure its an even number */
if (even_targ & 0x01) {
even_targ++;
}
cwnd = even_targ * mss;
#endif
return (cwnd);
}
static const char *timer_types[7] = {
"UNKN",
"RTO ",
"TLP ",
"RACK",
"KEEP",
"PERS",
"DACK"
};
#define BBR_TO_FRM_TMR 1
#define BBR_TO_FRM_TLP 2
#define BBR_TO_FRM_RACK 3
static const char *major_state[6] = {
"UNKNOWN STATE",
"BBR_STATE_STARTUP",
"BBR_STATE_DRAIN",
"BBR_STATE_PROBE_BW",
"BBR_STATE_PROBE_RTT",
"BBR_STATE_PERSIST_EXIT",
};
static const char *startup_reasons[12] = {
"Back from probe-rtt", /* 0 */
"Not up to speed", /* 1 */
"No loss at target", /* 2 */
"Had large Gain", /* 3 */
"Loss forces exit", /* 4 */
"Record new loss", /* 5 */
"Exit to drain", /* 6 */
"Not enough measurements", /* 7 */
"No exit required", /* 8 */
"No measurements", /* 9 */
"No loss no inc-rtt", /* 10 */
"No loss so stay" /* 11 */
};
/*
* startup = 10
* drain = 20
* probe_rtt = 30
* probe_bw = 40 - 110.
*/
static const char *
state_at_to_state_name(uint32_t st)
{
switch (st) {
case 10:
return ("STARTUP");
case 20:
return ("DRAIN");
case 30:
return ("PROBE_RTT");
case 40:
return ("PROBE_BW GAIN");
case 50:
return ("PROBE_BW DRAIN");
case 60:
return ("PROBE_BW LEVEL1");
case 70:
return ("PROBE_BW LEVEL2");
case 80:
return ("PROBE_BW LEVEL3");
case 90:
return ("PROBE_BW LEVEL4");
case 100:
return ("PROBE_BW LEVEL5");
case 110:
return ("PROBE_BW LEVEL6");
default:
return ("UNKNOWN");
}
}
static const char *
get_progress_event(uint8_t id)
{
static char foobar[64];
const char *ret;
if (id == 1) {
ret = "Dropping conn ";
} else if (id == 2) {
ret = "Updating ticks ";
} else if (id == 3) {
ret = "Stop una = th_ack";
} else if (id == 4) {
ret = "Starting una inc";
} else {
sprintf(foobar, "Unknown:%d", id);
ret = foobar;
}
return(ret);
}
static int
pad_out(int at, int to)
{
int i, cnt=0;
for(i=at; i<to; i++) {
cnt += fprintf(out, " ");
}
return(cnt);
}
static uint32_t state_at = 10;
static uint32_t tlb_sn = 0;
static uint32_t tlb_sn_set = 0;
static uint32_t duplicates=0;
static int old_state = 0;
static uint32_t epoch=0;
static uint32_t epoch_time=0;
static uint64_t del_rate=0;
static uint32_t prev_pkt_epoch=0;
static uint64_t pe_btlbw=0;
static int pg_not_set=1;
static int log_all_state_change = 1;
static uint64_t sent_state[9];
static uint64_t retran_count=0;
static uint32_t time_started_using_ltbw=0;
static int using_lt_bw=0;
static uint64_t total_time_using_lt_bw=0;
static uint64_t total_time_in_trace=0;
static uint32_t last_time_stamp;
static uint64_t total_time_persisting=0;
static uint64_t total_time_app_limited=0;
static uint32_t timeOfAppLimit;
static int is_app_limited=0;
static uint64_t app_limited_transitions=0;
static uint64_t total_time_no_avail=0;
static uint32_t timeOfnoAvail;
static int is_none_avail;
static uint64_t total_time_ltbw_sendok;
static int is_ltbw_sndok=0;
static uint32_t time_data_ltbw;
static uint64_t total_time_no_rwnd=0;
static uint32_t timeOfnoRwnd;
static uint32_t time_ended_using_lt_bw=0;
static int is_none_rwnd;
static uint32_t delivered_at_thresh=0;
static uint32_t lost_at_thresh=0;
static uint32_t policing_on = 0;
static int set_pkt_epoch = 0;
static uint32_t del_at_state=0;
static uint32_t lost_at_state=0;
static uint32_t state_send_count = 0;
static uint32_t state_send_bytes = 0;
static uint32_t max_rtt_in_state = 0;
static uint32_t min_rtt_in_state = 0xffffffff;
#define NUM_PKT_EPOCH_TRK 8
static int32_t pkt_epoch_lost[NUM_PKT_EPOCH_TRK];
static int32_t pkt_epoch_del[NUM_PKT_EPOCH_TRK];
static int32_t num_pkt_ep_filled=0;
static void
display_map_chg(const struct tcp_log_bbr *bbr)
{
if (bbr->flex8 > 11) {
fprintf(out, "Found %u at mapchg?\n",
bbr->flex8);
return;
}
fprintf(out, " - %s line:%d ",
map_chg_names[bbr->flex8], bbr->applimited);
if (bbr->flex7 & 0x4) {
fprintf(out, "pr_s:%u pr_e:%u (%u) ",
bbr->flex1, bbr->flex2,
(bbr->flex2 - bbr->flex1));
}
if (bbr->flex7 & 0x2) {
fprintf(out, "at_s:%u at_e:%u (%u) ",
bbr->flex3, bbr->flex4,
(bbr->flex4 - bbr->flex3));
}
if (bbr->flex7 & 0x1) {
fprintf(out, "nx_s:%u nx_e:%u (%u) ",
bbr->flex5, bbr->flex6,
(bbr->flex6 - bbr->flex5));
}
fprintf(out, " end:%u\n", bbr->pkts_out);
if (extra_print) {
print_out_space(out);
fprintf(out, "prev:0x%lx rsm:0x%lx next:0x%lx\n",
bbr->cur_del_rate,
bbr->delRate,
bbr->rttProp);
}
}
static void
pkt_epoch_track(uint32_t pe, uint32_t lost, uint32_t del)
{
int idx, i;
if (num_pkt_ep_filled >= NUM_PKT_EPOCH_TRK)
idx = NUM_PKT_EPOCH_TRK - 1;
else
idx = (pe - 1) % NUM_PKT_EPOCH_TRK;
for(i=idx; i>0; i--) {
pkt_epoch_del[i] = pkt_epoch_del[(i-1)];
pkt_epoch_lost[i] = pkt_epoch_lost[(i-1)];
}
pkt_epoch_del[0] = del;
pkt_epoch_lost[0] = lost;
if (num_pkt_ep_filled < NUM_PKT_EPOCH_TRK)
num_pkt_ep_filled++;
}
static void
print_epoch_loss(uint32_t pe, uint32_t lost, uint32_t del)
{
int i;
double r, l, d;
l = (100.0 * lost);
d = (1.0 * del);
if (l == 0.0) {
r = 0.0;
} else if (d == 0.0) {
r = 100.0;
} else {
r = l/d;
}
fprintf(out, "LOSS_RATES:(o-a)%2.1f%% ", r);
for(i=0; i<num_pkt_ep_filled; i++) {
l = (100.0 * (lost - pkt_epoch_lost[i]));
d = (1.0 * (del - pkt_epoch_del[i]));
if (l == 0.0) {
r = 0.0;
} else if (d == 0.0) {
r = 100.0;
} else {
r = l/d;
}
fprintf(out, "(%d)%2.1f%% ",
(i+1), r);
}
fprintf(out, "\n");
pkt_epoch_track(pe, lost, del);
}
static void
dump_sad_values(const struct tcp_log_bbr *bbr)
{
if (bbr->flex8 == 1) {
fprintf(out, "Detecting ");
} else if (bbr->flex8 == 2) {
fprintf(out, "An Attacker ");
} else if (bbr->flex8 == 3) {
fprintf(out, "False Positive ");
} else if (bbr->flex8 == 4) {
fprintf(out, "Suspicious SACK ");
} else if (bbr->flex8 == 5) {
fprintf(out, "SACK details e:%u s:%u [l:%u] rsm_e:%u rsm_s:%u [l:%u] fas:%u bas:%u jr:%u segsiz:%u rflags:0x%x\n",
bbr->flex1, bbr->flex2,
(bbr->flex1 - bbr->flex2),
bbr->flex3, bbr->flex4,
(bbr->flex3 - bbr->flex4),
bbr->flex6, bbr->flex7,
bbr->bbr_substate, bbr->flex5, bbr->pkts_out
);
return;
} else {
fprintf(out, "meth:%d? ", bbr->flex8);
}
fprintf(out, "Sacks:%u Acks:%u mv:%u nomv:%u mapa:%u sd:%d supicious:%u\n",
bbr->flex1, bbr->flex2,
bbr->flex3, bbr->flex4,
bbr->flex5, bbr->flex7, bbr->bbr_state);
print_out_space(out);
fprintf(out, "flight:%u s2ath:%u s2mth:%u fd:%d dd:%d map_lim:%u decay_th:%u\n",
bbr->inflight,
bbr->flex6,
bbr->pkts_out,
((bbr->lt_epoch >> 8) & 0xff),
(bbr->lt_epoch & 0xff),
bbr->applimited, bbr->delivered);
}
static void
dump_sack_filter(const struct tcp_log_bbr *bbr)
{
fprintf(out, "%d entries left\n", bbr->flex8);
if (bbr->flex8 > 0) {
print_out_space(out);
fprintf(out, "SACK:%u:%u (%u)\n",
bbr->flex1, bbr->flex2,
(bbr->flex2 - bbr->flex1));
}
if (bbr->flex8 > 1) {
print_out_space(out);
fprintf(out, "SACK:%u:%u (%u)\n",
bbr->flex3, bbr->flex4,
(bbr->flex4 - bbr->flex3));