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15#include <stdio.h>
16#include <stdlib.h>
17#include <unistd.h>
18#include <fcntl.h>
19#include <sys/socket.h>
20#include <netinet/in.h>
21#include <arpa/inet.h>
22#include <string.h>
23
24#include "utils.h"
25#include "tc_util.h"
26
27static void explain(void)
28{
29 fprintf(stderr,
30 "Usage: ... sfb [ rehash SECS ] [ db SECS ]\n"
31 " [ limit PACKETS ] [ max PACKETS ] [ target PACKETS ]\n"
32 " [ increment FLOAT ] [ decrement FLOAT ]\n"
33 " [ penalty_rate PPS ] [ penalty_burst PACKETS ]\n");
34}
35
36static int get_prob(__u32 *val, const char *arg)
37{
38 double d;
39 char *ptr;
40
41 if (!arg || !*arg)
42 return -1;
43 d = strtod(arg, &ptr);
44 if (!ptr || ptr == arg || d < 0.0 || d > 1.0)
45 return -1;
46 *val = (__u32)(d * SFB_MAX_PROB + 0.5);
47 return 0;
48}
49
50static int sfb_parse_opt(struct qdisc_util *qu, int argc, char **argv,
51 struct nlmsghdr *n, const char *dev)
52{
53 struct tc_sfb_qopt opt = {
54 .rehash_interval = 600*1000,
55 .warmup_time = 60*1000,
56 .penalty_rate = 10,
57 .penalty_burst = 20,
58 .increment = (SFB_MAX_PROB + 1000) / 2000,
59 .decrement = (SFB_MAX_PROB + 10000) / 20000,
60 };
61 struct rtattr *tail;
62
63 while (argc > 0) {
64 if (strcmp(*argv, "rehash") == 0) {
65 NEXT_ARG();
66 if (get_u32(&opt.rehash_interval, *argv, 0)) {
67 fprintf(stderr, "Illegal \"rehash\"\n");
68 return -1;
69 }
70 } else if (strcmp(*argv, "db") == 0) {
71 NEXT_ARG();
72 if (get_u32(&opt.warmup_time, *argv, 0)) {
73 fprintf(stderr, "Illegal \"db\"\n");
74 return -1;
75 }
76 } else if (strcmp(*argv, "limit") == 0) {
77 NEXT_ARG();
78 if (get_u32(&opt.limit, *argv, 0)) {
79 fprintf(stderr, "Illegal \"limit\"\n");
80 return -1;
81 }
82 } else if (strcmp(*argv, "max") == 0) {
83 NEXT_ARG();
84 if (get_u32(&opt.max, *argv, 0)) {
85 fprintf(stderr, "Illegal \"max\"\n");
86 return -1;
87 }
88 } else if (strcmp(*argv, "target") == 0) {
89 NEXT_ARG();
90 if (get_u32(&opt.bin_size, *argv, 0)) {
91 fprintf(stderr, "Illegal \"target\"\n");
92 return -1;
93 }
94 } else if (strcmp(*argv, "increment") == 0) {
95 NEXT_ARG();
96 if (get_prob(&opt.increment, *argv)) {
97 fprintf(stderr, "Illegal \"increment\"\n");
98 return -1;
99 }
100 } else if (strcmp(*argv, "decrement") == 0) {
101 NEXT_ARG();
102 if (get_prob(&opt.decrement, *argv)) {
103 fprintf(stderr, "Illegal \"decrement\"\n");
104 return -1;
105 }
106 } else if (strcmp(*argv, "penalty_rate") == 0) {
107 NEXT_ARG();
108 if (get_u32(&opt.penalty_rate, *argv, 0)) {
109 fprintf(stderr, "Illegal \"penalty_rate\"\n");
110 return -1;
111 }
112 } else if (strcmp(*argv, "penalty_burst") == 0) {
113 NEXT_ARG();
114 if (get_u32(&opt.penalty_burst, *argv, 0)) {
115 fprintf(stderr, "Illegal \"penalty_burst\"\n");
116 return -1;
117 }
118 } else {
119 fprintf(stderr, "What is \"%s\"?\n", *argv);
120 explain();
121 return -1;
122 }
123 argc--; argv++;
124 }
125
126 if (opt.max == 0) {
127 if (opt.bin_size >= 1)
128 opt.max = (opt.bin_size * 5 + 1) / 4;
129 else
130 opt.max = 25;
131 }
132 if (opt.bin_size == 0)
133 opt.bin_size = (opt.max * 4 + 3) / 5;
134
135 tail = addattr_nest(n, 1024, TCA_OPTIONS);
136 addattr_l(n, 1024, TCA_SFB_PARMS, &opt, sizeof(opt));
137 addattr_nest_end(n, tail);
138 return 0;
139}
140
141static int sfb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
142{
143 struct rtattr *tb[__TCA_SFB_MAX];
144 struct tc_sfb_qopt *qopt;
145
146 SPRINT_BUF(b1);
147
148 if (opt == NULL)
149 return 0;
150
151 parse_rtattr_nested(tb, TCA_SFB_MAX, opt);
152 if (tb[TCA_SFB_PARMS] == NULL)
153 return -1;
154 qopt = RTA_DATA(tb[TCA_SFB_PARMS]);
155 if (RTA_PAYLOAD(tb[TCA_SFB_PARMS]) < sizeof(*qopt))
156 return -1;
157
158 print_uint(PRINT_JSON, "rehash", NULL, qopt->rehash_interval * 1000);
159 print_string(PRINT_FP, NULL, "rehash %s ",
160 sprint_time(qopt->rehash_interval * 1000, b1));
161
162 print_uint(PRINT_JSON, "db", NULL, qopt->warmup_time * 1000);
163 print_string(PRINT_FP, NULL, "db %s ",
164 sprint_time(qopt->warmup_time * 1000, b1));
165
166 print_uint(PRINT_ANY, "limit", "limit %up ", qopt->limit);
167 print_uint(PRINT_ANY, "max", "max %up ", qopt->max);
168 print_uint(PRINT_ANY, "target", "target %up ", qopt->bin_size);
169
170 print_float(PRINT_ANY, "increment", "increment %lg ",
171 (double)qopt->increment / SFB_MAX_PROB);
172 print_float(PRINT_ANY, "decrement", "decrement %lg ",
173 (double)qopt->decrement / SFB_MAX_PROB);
174
175 print_uint(PRINT_ANY, "penalty_rate", "penalty_rate %upps ",
176 qopt->penalty_rate);
177 print_uint(PRINT_ANY, "penalty_burst", "penalty_burst %up ",
178 qopt->penalty_burst);
179
180 return 0;
181}
182
183static int sfb_print_xstats(struct qdisc_util *qu, FILE *f,
184 struct rtattr *xstats)
185{
186 struct tc_sfb_xstats *st;
187
188 if (xstats == NULL)
189 return 0;
190
191 if (RTA_PAYLOAD(xstats) < sizeof(*st))
192 return -1;
193
194 st = RTA_DATA(xstats);
195
196 print_uint(PRINT_ANY, "earlydrop", " earlydrop %u", st->earlydrop);
197 print_uint(PRINT_ANY, "penaltydrop", " penaltydrop %u",
198 st->penaltydrop);
199 print_uint(PRINT_ANY, "bucketdrop", " bucketdrop %u", st->bucketdrop);
200 print_uint(PRINT_ANY, "queuedrop", " queuedrop %u", st->queuedrop);
201 print_uint(PRINT_ANY, "childdrop", " childdrop %u", st->childdrop);
202 print_uint(PRINT_ANY, "marked", " marked %u", st->marked);
203 print_nl();
204 print_uint(PRINT_ANY, "maxqlen", " maxqlen %u", st->maxqlen);
205
206 print_float(PRINT_ANY, "maxprob", " maxprob %lg",
207 (double)st->maxprob / SFB_MAX_PROB);
208 print_float(PRINT_ANY, "avgprob", " avgprob %lg",
209 (double)st->avgprob / SFB_MAX_PROB);
210
211 return 0;
212}
213
214struct qdisc_util sfb_qdisc_util = {
215 .id = "sfb",
216 .parse_qopt = sfb_parse_opt,
217 .print_qopt = sfb_print_opt,
218 .print_xstats = sfb_print_xstats,
219};
220
