1/* 2 * q_fifo.c FIFO. 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@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 26static void explain(void) 27{ 28 fprintf(stderr, "Usage: ... <[p|b]fifo | pfifo_head_drop> [ limit NUMBER ]\n"); 29} 30 31static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) 32{ 33 int ok=0; 34 struct tc_fifo_qopt opt; 35 memset(&opt, 0, sizeof(opt)); 36 37 while (argc > 0) { 38 if (strcmp(*argv, "limit") == 0) { 39 NEXT_ARG(); 40 if (get_size(&opt.limit, *argv)) { 41 fprintf(stderr, "Illegal \"limit\"\n"); 42 return -1; 43 } 44 ok++; 45 } else if (strcmp(*argv, "help") == 0) { 46 explain(); 47 return -1; 48 } else { 49 fprintf(stderr, "What is \"%s\"?\n", *argv); 50 explain(); 51 return -1; 52 } 53 argc--; argv++; 54 } 55 56 if (ok) 57 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)); 58 return 0; 59} 60 61static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) 62{ 63 struct tc_fifo_qopt *qopt; 64 65 if (opt == NULL) 66 return 0; 67 68 if (RTA_PAYLOAD(opt) < sizeof(*qopt)) 69 return -1; 70 qopt = RTA_DATA(opt); 71 if (strcmp(qu->id, "bfifo") == 0) { 72 SPRINT_BUF(b1); 73 fprintf(f, "limit %s", sprint_size(qopt->limit, b1)); 74 } else 75 fprintf(f, "limit %up", qopt->limit); 76 return 0; 77} 78 79 80struct qdisc_util bfifo_qdisc_util = { 81 .id = "bfifo", 82 .parse_qopt = fifo_parse_opt, 83 .print_qopt = fifo_print_opt, 84}; 85 86struct qdisc_util pfifo_qdisc_util = { 87 .id = "pfifo", 88 .parse_qopt = fifo_parse_opt, 89 .print_qopt = fifo_print_opt, 90}; 91 92struct qdisc_util pfifo_head_drop_qdisc_util = { 93 .id = "pfifo_head_drop", 94 .parse_qopt = fifo_parse_opt, 95 .print_qopt = fifo_print_opt, 96}; 97 98extern int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt); 99struct qdisc_util pfifo_fast_qdisc_util = { 100 .id = "pfifo_fast", 101 .print_qopt = prio_print_opt, 102}; 103