1 /* 2 * q_sfq.c SFQ. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: Alexey Kuznetsov, <kuznet (at) ms2.inr.ac.ru> 10 * 11 */ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <unistd.h> 16 #include <syslog.h> 17 #include <fcntl.h> 18 #include <sys/socket.h> 19 #include <netinet/in.h> 20 #include <arpa/inet.h> 21 #include <string.h> 22 23 #include "utils.h" 24 #include "tc_util.h" 25 26 static void explain(void) 27 { 28 fprintf(stderr, "Usage: ... sfq [ limit NUMBER ] [ perturb SECS ] [ quantum BYTES ]\n"); 29 } 30 31 static int sfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) 32 { 33 int ok=0; 34 struct tc_sfq_qopt opt; 35 36 memset(&opt, 0, sizeof(opt)); 37 38 while (argc > 0) { 39 if (strcmp(*argv, "quantum") == 0) { 40 NEXT_ARG(); 41 if (get_size(&opt.quantum, *argv)) { 42 fprintf(stderr, "Illegal \"limit\"\n"); 43 return -1; 44 } 45 ok++; 46 } else if (strcmp(*argv, "perturb") == 0) { 47 NEXT_ARG(); 48 if (get_integer(&opt.perturb_period, *argv, 0)) { 49 fprintf(stderr, "Illegal \"perturb\"\n"); 50 return -1; 51 } 52 ok++; 53 } else if (strcmp(*argv, "limit") == 0) { 54 NEXT_ARG(); 55 if (get_u32(&opt.limit, *argv, 0)) { 56 fprintf(stderr, "Illegal \"limit\"\n"); 57 return -1; 58 } 59 if (opt.limit < 2) { 60 fprintf(stderr, "Illegal \"limit\", must be > 1\n"); 61 return -1; 62 } 63 ok++; 64 } else if (strcmp(*argv, "help") == 0) { 65 explain(); 66 return -1; 67 } else { 68 fprintf(stderr, "What is \"%s\"?\n", *argv); 69 explain(); 70 return -1; 71 } 72 argc--; argv++; 73 } 74 75 if (ok) 76 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)); 77 return 0; 78 } 79 80 static int sfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) 81 { 82 struct tc_sfq_qopt *qopt; 83 SPRINT_BUF(b1); 84 85 if (opt == NULL) 86 return 0; 87 88 if (RTA_PAYLOAD(opt) < sizeof(*qopt)) 89 return -1; 90 qopt = RTA_DATA(opt); 91 fprintf(f, "limit %up ", qopt->limit); 92 fprintf(f, "quantum %s ", sprint_size(qopt->quantum, b1)); 93 if (show_details) { 94 fprintf(f, "flows %u/%u ", qopt->flows, qopt->divisor); 95 } 96 if (qopt->perturb_period) 97 fprintf(f, "perturb %dsec ", qopt->perturb_period); 98 return 0; 99 } 100 101 static int sfq_print_xstats(struct qdisc_util *qu, FILE *f, 102 struct rtattr *xstats) 103 { 104 struct tc_sfq_xstats *st; 105 106 if (xstats == NULL) 107 return 0; 108 if (RTA_PAYLOAD(xstats) < sizeof(*st)) 109 return -1; 110 st = RTA_DATA(xstats); 111 112 fprintf(f, " allot %d ", st->allot); 113 fprintf(f, "\n"); 114 return 0; 115 } 116 117 struct qdisc_util sfq_qdisc_util = { 118 .id = "sfq", 119 .parse_qopt = sfq_parse_opt, 120 .print_qopt = sfq_print_opt, 121 .print_xstats = sfq_print_xstats, 122 }; 123