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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 <fcntl.h> | |
22 | #include <sys/socket.h> | |
23 | #include <netinet/in.h> | |
24 | #include <arpa/inet.h> | |
25 | #include <string.h> | |
26 | #include <math.h> | |
27 | ||
28 | #include "utils.h" | |
29 | #include "tc_util.h" | |
30 | ||
31 | static void explain(void) | |
32 | { | |
33 | fprintf(stderr, "Usage: ... pie [ limit PACKETS ][ target TIME us]\n"); | |
34 | fprintf(stderr, " [ tupdate TIME us][ alpha ALPHA ]"); | |
35 | fprintf(stderr, "[beta BETA ][bytemode | nobytemode][ecn | noecn ]\n"); | |
36 | } | |
37 | ||
38 | #define ALPHA_MAX 32 | |
39 | #define BETA_MAX 32 | |
40 | ||
41 | static int pie_parse_opt(struct qdisc_util *qu, int argc, char **argv, | |
42 | struct nlmsghdr *n, const char *dev) | |
43 | { | |
44 | unsigned int limit = 0; | |
45 | unsigned int target = 0; | |
46 | unsigned int tupdate = 0; | |
47 | unsigned int alpha = 0; | |
48 | unsigned int beta = 0; | |
49 | int ecn = -1; | |
50 | int bytemode = -1; | |
51 | struct rtattr *tail; | |
52 | ||
53 | while (argc > 0) { | |
54 | if (strcmp(*argv, "limit") == 0) { | |
55 | NEXT_ARG(); | |
56 | if (get_unsigned(&limit, *argv, 0)) { | |
57 | fprintf(stderr, "Illegal \"limit\"\n"); | |
58 | return -1; | |
59 | } | |
60 | } else if (strcmp(*argv, "target") == 0) { | |
61 | NEXT_ARG(); | |
62 | if (get_time(&target, *argv)) { | |
63 | fprintf(stderr, "Illegal \"target\"\n"); | |
64 | return -1; | |
65 | } | |
66 | } else if (strcmp(*argv, "tupdate") == 0) { | |
67 | NEXT_ARG(); | |
68 | if (get_time(&tupdate, *argv)) { | |
69 | fprintf(stderr, "Illegal \"tupdate\"\n"); | |
70 | return -1; | |
71 | } | |
72 | } else if (strcmp(*argv, "alpha") == 0) { | |
73 | NEXT_ARG(); | |
74 | if (get_unsigned(&alpha, *argv, 0) || | |
75 | (alpha > ALPHA_MAX)) { | |
76 | fprintf(stderr, "Illegal \"alpha\"\n"); | |
77 | return -1; | |
78 | } | |
79 | } else if (strcmp(*argv, "beta") == 0) { | |
80 | NEXT_ARG(); | |
81 | if (get_unsigned(&beta, *argv, 0) || | |
82 | (beta > BETA_MAX)) { | |
83 | fprintf(stderr, "Illegal \"beta\"\n"); | |
84 | return -1; | |
85 | } | |
86 | } else if (strcmp(*argv, "ecn") == 0) { | |
87 | ecn = 1; | |
88 | } else if (strcmp(*argv, "noecn") == 0) { | |
89 | ecn = 0; | |
90 | } else if (strcmp(*argv, "bytemode") == 0) { | |
91 | bytemode = 1; | |
92 | } else if (strcmp(*argv, "nobytemode") == 0) { | |
93 | bytemode = 0; | |
94 | } else if (strcmp(*argv, "help") == 0) { | |
95 | explain(); | |
96 | return -1; | |
97 | } else { | |
98 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
99 | explain(); | |
100 | return -1; | |
101 | } | |
102 | argc--; | |
103 | argv++; | |
104 | } | |
105 | ||
106 | tail = addattr_nest(n, 1024, TCA_OPTIONS); | |
107 | if (limit) | |
108 | addattr_l(n, 1024, TCA_PIE_LIMIT, &limit, sizeof(limit)); | |
109 | if (tupdate) | |
110 | addattr_l(n, 1024, TCA_PIE_TUPDATE, &tupdate, sizeof(tupdate)); | |
111 | if (target) | |
112 | addattr_l(n, 1024, TCA_PIE_TARGET, &target, sizeof(target)); | |
113 | if (alpha) | |
114 | addattr_l(n, 1024, TCA_PIE_ALPHA, &alpha, sizeof(alpha)); | |
115 | if (beta) | |
116 | addattr_l(n, 1024, TCA_PIE_BETA, &beta, sizeof(beta)); | |
117 | if (ecn != -1) | |
118 | addattr_l(n, 1024, TCA_PIE_ECN, &ecn, sizeof(ecn)); | |
119 | if (bytemode != -1) | |
120 | addattr_l(n, 1024, TCA_PIE_BYTEMODE, &bytemode, | |
121 | sizeof(bytemode)); | |
122 | ||
123 | addattr_nest_end(n, tail); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int pie_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
128 | { | |
129 | struct rtattr *tb[TCA_PIE_MAX + 1]; | |
130 | unsigned int limit; | |
131 | unsigned int tupdate; | |
132 | unsigned int target; | |
133 | unsigned int alpha; | |
134 | unsigned int beta; | |
135 | unsigned int ecn; | |
136 | unsigned int bytemode; | |
137 | ||
138 | SPRINT_BUF(b1); | |
139 | ||
140 | if (opt == NULL) | |
141 | return 0; | |
142 | ||
143 | parse_rtattr_nested(tb, TCA_PIE_MAX, opt); | |
144 | ||
145 | if (tb[TCA_PIE_LIMIT] && | |
146 | RTA_PAYLOAD(tb[TCA_PIE_LIMIT]) >= sizeof(__u32)) { | |
147 | limit = rta_getattr_u32(tb[TCA_PIE_LIMIT]); | |
148 | fprintf(f, "limit %up ", limit); | |
149 | } | |
150 | if (tb[TCA_PIE_TARGET] && | |
151 | RTA_PAYLOAD(tb[TCA_PIE_TARGET]) >= sizeof(__u32)) { | |
152 | target = rta_getattr_u32(tb[TCA_PIE_TARGET]); | |
153 | fprintf(f, "target %s ", sprint_time(target, b1)); | |
154 | } | |
155 | if (tb[TCA_PIE_TUPDATE] && | |
156 | RTA_PAYLOAD(tb[TCA_PIE_TUPDATE]) >= sizeof(__u32)) { | |
157 | tupdate = rta_getattr_u32(tb[TCA_PIE_TUPDATE]); | |
158 | fprintf(f, "tupdate %s ", sprint_time(tupdate, b1)); | |
159 | } | |
160 | if (tb[TCA_PIE_ALPHA] && | |
161 | RTA_PAYLOAD(tb[TCA_PIE_ALPHA]) >= sizeof(__u32)) { | |
162 | alpha = rta_getattr_u32(tb[TCA_PIE_ALPHA]); | |
163 | fprintf(f, "alpha %u ", alpha); | |
164 | } | |
165 | if (tb[TCA_PIE_BETA] && | |
166 | RTA_PAYLOAD(tb[TCA_PIE_BETA]) >= sizeof(__u32)) { | |
167 | beta = rta_getattr_u32(tb[TCA_PIE_BETA]); | |
168 | fprintf(f, "beta %u ", beta); | |
169 | } | |
170 | ||
171 | if (tb[TCA_PIE_ECN] && RTA_PAYLOAD(tb[TCA_PIE_ECN]) >= sizeof(__u32)) { | |
172 | ecn = rta_getattr_u32(tb[TCA_PIE_ECN]); | |
173 | if (ecn) | |
174 | fprintf(f, "ecn "); | |
175 | } | |
176 | ||
177 | if (tb[TCA_PIE_BYTEMODE] && | |
178 | RTA_PAYLOAD(tb[TCA_PIE_BYTEMODE]) >= sizeof(__u32)) { | |
179 | bytemode = rta_getattr_u32(tb[TCA_PIE_BYTEMODE]); | |
180 | if (bytemode) | |
181 | fprintf(f, "bytemode "); | |
182 | } | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int pie_print_xstats(struct qdisc_util *qu, FILE *f, | |
188 | struct rtattr *xstats) | |
189 | { | |
190 | struct tc_pie_xstats *st; | |
191 | ||
192 | if (xstats == NULL) | |
193 | return 0; | |
194 | ||
195 | if (RTA_PAYLOAD(xstats) < sizeof(*st)) | |
196 | return -1; | |
197 | ||
198 | st = RTA_DATA(xstats); | |
199 | /*prob is returned as a fracion of maximum integer value */ | |
200 | fprintf(f, "prob %f delay %uus avg_dq_rate %u\n", | |
201 | (double)st->prob / (double)0xffffffff, st->delay, | |
202 | st->avg_dq_rate); | |
203 | fprintf(f, "pkts_in %u overlimit %u dropped %u maxq %u ecn_mark %u\n", | |
204 | st->packets_in, st->overlimit, st->dropped, st->maxq, | |
205 | st->ecn_mark); | |
206 | return 0; | |
207 | ||
208 | } | |
209 | ||
210 | struct qdisc_util pie_qdisc_util = { | |
211 | .id = "pie", | |
212 | .parse_qopt = pie_parse_opt, | |
213 | .print_qopt = pie_print_opt, | |
214 | .print_xstats = pie_print_xstats, | |
215 | }; |