Vijay Subramanian | 80dd880 | 2014-01-07 22:00:39 -0800 | [diff] [blame] | 1 | /* Copyright (C) 2013 Cisco Systems, Inc, 2013. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of the GNU General Public License |
| 5 | * as published by the Free Software Foundation; either version 2 |
| 6 | * of the License. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * Author: Vijay Subramanian <vijaynsu@cisco.com> |
| 14 | * Author: Mythili Prabhu <mysuryan@cisco.com> |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <unistd.h> |
| 21 | #include <syslog.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <sys/socket.h> |
| 24 | #include <netinet/in.h> |
| 25 | #include <arpa/inet.h> |
| 26 | #include <string.h> |
| 27 | #include <math.h> |
| 28 | |
| 29 | #include "utils.h" |
| 30 | #include "tc_util.h" |
| 31 | |
| 32 | static void explain(void) |
| 33 | { |
| 34 | fprintf(stderr, "Usage: ... pie [ limit PACKETS ][ target TIME us]\n"); |
| 35 | fprintf(stderr, " [ tupdate TIME us][ alpha ALPHA ]"); |
| 36 | fprintf(stderr, "[beta BETA ][bytemode | nobytemode][ecn | noecn ]\n"); |
| 37 | } |
| 38 | |
| 39 | #define ALPHA_MAX 32 |
| 40 | #define ALPHA_MIN 0 |
| 41 | #define BETA_MAX 32 |
| 42 | #define BETA_MIN 0 |
| 43 | |
| 44 | static int pie_parse_opt(struct qdisc_util *qu, int argc, char **argv, |
| 45 | struct nlmsghdr *n) |
| 46 | { |
| 47 | unsigned int limit = 0; |
| 48 | unsigned int target = 0; |
| 49 | unsigned int tupdate = 0; |
| 50 | unsigned int alpha = 0; |
| 51 | unsigned int beta = 0; |
| 52 | int ecn = -1; |
| 53 | int bytemode = -1; |
| 54 | struct rtattr *tail; |
| 55 | |
| 56 | while (argc > 0) { |
| 57 | if (strcmp(*argv, "limit") == 0) { |
| 58 | NEXT_ARG(); |
| 59 | if (get_unsigned(&limit, *argv, 0)) { |
| 60 | fprintf(stderr, "Illegal \"limit\"\n"); |
| 61 | return -1; |
| 62 | } |
| 63 | } else if (strcmp(*argv, "target") == 0) { |
| 64 | NEXT_ARG(); |
| 65 | if (get_time(&target, *argv)) { |
| 66 | fprintf(stderr, "Illegal \"target\"\n"); |
| 67 | return -1; |
| 68 | } |
| 69 | } else if (strcmp(*argv, "tupdate") == 0) { |
| 70 | NEXT_ARG(); |
| 71 | if (get_time(&tupdate, *argv)) { |
| 72 | fprintf(stderr, "Illegal \"tupdate\"\n"); |
| 73 | return -1; |
| 74 | } |
| 75 | } else if (strcmp(*argv, "alpha") == 0) { |
| 76 | NEXT_ARG(); |
| 77 | if (get_unsigned(&alpha, *argv, 0) || |
| 78 | (alpha > ALPHA_MAX) || (alpha < ALPHA_MIN)) { |
| 79 | fprintf(stderr, "Illegal \"alpha\"\n"); |
| 80 | return -1; |
| 81 | } |
| 82 | } else if (strcmp(*argv, "beta") == 0) { |
| 83 | NEXT_ARG(); |
| 84 | if (get_unsigned(&beta, *argv, 0) || |
| 85 | (beta > BETA_MAX) || (beta < BETA_MIN)) { |
| 86 | fprintf(stderr, "Illegal \"beta\"\n"); |
| 87 | return -1; |
| 88 | } |
| 89 | } else if (strcmp(*argv, "ecn") == 0) { |
| 90 | ecn = 1; |
| 91 | } else if (strcmp(*argv, "noecn") == 0) { |
| 92 | ecn = 0; |
| 93 | } else if (strcmp(*argv, "bytemode") == 0) { |
| 94 | bytemode = 1; |
| 95 | } else if (strcmp(*argv, "nobytemode") == 0) { |
| 96 | bytemode = 0; |
| 97 | } else if (strcmp(*argv, "help") == 0) { |
| 98 | explain(); |
| 99 | return -1; |
| 100 | } else { |
| 101 | fprintf(stderr, "What is \"%s\"?\n", *argv); |
| 102 | explain(); |
| 103 | return -1; |
| 104 | } |
| 105 | argc--; |
| 106 | argv++; |
| 107 | } |
| 108 | |
| 109 | tail = NLMSG_TAIL(n); |
| 110 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
| 111 | if (limit) |
| 112 | addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit)); |
| 113 | if (tupdate) |
| 114 | addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate)); |
| 115 | if (target) |
| 116 | addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target)); |
| 117 | if (alpha) |
| 118 | addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha)); |
| 119 | if (beta) |
| 120 | addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta)); |
| 121 | if (ecn != -1) |
| 122 | addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn)); |
| 123 | if (bytemode != -1) |
| 124 | addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode, |
| 125 | sizeof(bytemode)); |
| 126 | |
| 127 | tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail; |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static int pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) |
| 132 | { |
| 133 | struct rtattr *tb[TCA_PIE_MAX + 1]; |
| 134 | unsigned int limit; |
| 135 | unsigned int tupdate; |
| 136 | unsigned int target; |
| 137 | unsigned int alpha; |
| 138 | unsigned int beta; |
Stephen Hemminger | 32a121c | 2016-03-21 11:48:36 -0700 | [diff] [blame] | 139 | unsigned int ecn; |
| 140 | unsigned int bytemode; |
| 141 | |
Vijay Subramanian | 80dd880 | 2014-01-07 22:00:39 -0800 | [diff] [blame] | 142 | SPRINT_BUF(b1); |
| 143 | |
| 144 | if (opt == NULL) |
| 145 | return 0; |
| 146 | |
| 147 | parse_rtattr_nested(tb, TCA_PIE_MAX, opt); |
| 148 | |
| 149 | if (tb[TCA_PIE_LIMIT] && |
| 150 | RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) { |
| 151 | limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]); |
| 152 | fprintf(f, "limit %up ", limit); |
| 153 | } |
| 154 | if (tb[TCA_PIE_TARGET] && |
| 155 | RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) { |
| 156 | target = rta_getattr_u32(tb[TCA_PIE_TARGET]); |
| 157 | fprintf(f, "target %s ", sprint_time(target, b1)); |
| 158 | } |
| 159 | if (tb[TCA_PIE_TUPDATE] && |
| 160 | RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) { |
| 161 | tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]); |
| 162 | fprintf(f, "tupdate %s ", sprint_time(tupdate, b1)); |
| 163 | } |
| 164 | if (tb[TCA_PIE_ALPHA] && |
| 165 | RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) { |
| 166 | alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]); |
| 167 | fprintf(f, "alpha %u ", alpha); |
| 168 | } |
| 169 | if (tb[TCA_PIE_BETA] && |
| 170 | RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) { |
| 171 | beta = rta_getattr_u32(tb[TCA_PIE_BETA]); |
| 172 | fprintf(f, "beta %u ", beta); |
| 173 | } |
| 174 | |
| 175 | if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) { |
| 176 | ecn = rta_getattr_u32(tb[TCA_PIE_ECN]); |
| 177 | if (ecn) |
| 178 | fprintf(f, "ecn "); |
| 179 | } |
| 180 | |
| 181 | if (tb[TCA_PIE_BYTEMODE] && |
| 182 | RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) { |
| 183 | bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]); |
| 184 | if (bytemode) |
| 185 | fprintf(f, "bytemode "); |
| 186 | } |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int pie_print_xstats(struct qdisc_util *qu, FILE *f, |
| 192 | struct rtattr *xstats) |
| 193 | { |
| 194 | struct tc_pie_xstats *st; |
| 195 | |
| 196 | if (xstats == NULL) |
| 197 | return 0; |
| 198 | |
| 199 | if (RTA_PAYLOAD(xstats) < sizeof(*st)) |
| 200 | return -1; |
| 201 | |
| 202 | st = RTA_DATA(xstats); |
| 203 | /*prob is returned as a fracion of maximum integer value */ |
| 204 | fprintf(f, "prob %f delay %uus avg_dq_rate %u\n", |
| 205 | (double)st->prob / (double)0xffffffff, st->delay, |
| 206 | st->avg_dq_rate); |
| 207 | fprintf(f, "pkts_in %u overlimit %u dropped %u maxq %u ecn_mark %u\n", |
| 208 | st->packets_in, st->overlimit, st->dropped, st->maxq, |
| 209 | st->ecn_mark); |
| 210 | return 0; |
| 211 | |
| 212 | } |
| 213 | |
| 214 | struct qdisc_util pie_qdisc_util = { |
| 215 | .id = "pie", |
| 216 | .parse_qopt = pie_parse_opt, |
| 217 | .print_qopt = pie_print_opt, |
| 218 | .print_xstats = pie_print_xstats, |
| 219 | }; |