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aba5acdf SH |
1 | /* |
2 | * tc_class.c "tc class". | |
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 | #include <math.h> | |
23 | ||
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | #include "tc_common.h" | |
27 | ||
b611d516 | 28 | static void usage(void); |
aba5acdf SH |
29 | |
30 | static void usage(void) | |
31 | { | |
e5d179d8 | 32 | fprintf(stderr, "Usage: tc class [ add | del | change | replace | show ] dev STRING\n"); |
aba5acdf SH |
33 | fprintf(stderr, " [ classid CLASSID ] [ root | parent CLASSID ]\n"); |
34 | fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); | |
35 | fprintf(stderr, "\n"); | |
36 | fprintf(stderr, " tc class show [ dev STRING ] [ root | parent CLASSID ]\n"); | |
37 | fprintf(stderr, "Where:\n"); | |
38 | fprintf(stderr, "QDISC_KIND := { prio | cbq | etc. }\n"); | |
39 | fprintf(stderr, "OPTIONS := ... try tc class add <desired QDISC_KIND> help\n"); | |
b611d516 | 40 | return; |
aba5acdf SH |
41 | } |
42 | ||
43 | int tc_class_modify(int cmd, unsigned flags, int argc, char **argv) | |
44 | { | |
aba5acdf SH |
45 | struct { |
46 | struct nlmsghdr n; | |
47 | struct tcmsg t; | |
48 | char buf[4096]; | |
49 | } req; | |
50 | struct qdisc_util *q = NULL; | |
51 | struct tc_estimator est; | |
52 | char d[16]; | |
53 | char k[16]; | |
54 | ||
55 | memset(&req, 0, sizeof(req)); | |
56 | memset(&est, 0, sizeof(est)); | |
57 | memset(d, 0, sizeof(d)); | |
58 | memset(k, 0, sizeof(k)); | |
59 | ||
60 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)); | |
61 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; | |
62 | req.n.nlmsg_type = cmd; | |
63 | req.t.tcm_family = AF_UNSPEC; | |
64 | ||
65 | while (argc > 0) { | |
66 | if (strcmp(*argv, "dev") == 0) { | |
67 | NEXT_ARG(); | |
68 | if (d[0]) | |
69 | duparg("dev", *argv); | |
70 | strncpy(d, *argv, sizeof(d)-1); | |
71 | } else if (strcmp(*argv, "classid") == 0) { | |
72 | __u32 handle; | |
73 | NEXT_ARG(); | |
74 | if (req.t.tcm_handle) | |
75 | duparg("classid", *argv); | |
76 | if (get_tc_classid(&handle, *argv)) | |
77 | invarg(*argv, "invalid class ID"); | |
78 | req.t.tcm_handle = handle; | |
7e6b809c SH |
79 | } else if (strcmp(*argv, "handle") == 0) { |
80 | fprintf(stderr, "Error: try \"classid\" instead of \"handle\"\n"); | |
81 | return -1; | |
82 | } else if (strcmp(*argv, "root") == 0) { | |
aba5acdf SH |
83 | if (req.t.tcm_parent) { |
84 | fprintf(stderr, "Error: \"root\" is duplicate parent ID.\n"); | |
b611d516 | 85 | return -1; |
aba5acdf SH |
86 | } |
87 | req.t.tcm_parent = TC_H_ROOT; | |
88 | } else if (strcmp(*argv, "parent") == 0) { | |
89 | __u32 handle; | |
90 | NEXT_ARG(); | |
91 | if (req.t.tcm_parent) | |
92 | duparg("parent", *argv); | |
93 | if (get_tc_classid(&handle, *argv)) | |
94 | invarg(*argv, "invalid parent ID"); | |
95 | req.t.tcm_parent = handle; | |
96 | } else if (matches(*argv, "estimator") == 0) { | |
97 | if (parse_estimator(&argc, &argv, &est)) | |
98 | return -1; | |
99 | } else if (matches(*argv, "help") == 0) { | |
100 | usage(); | |
101 | } else { | |
102 | strncpy(k, *argv, sizeof(k)-1); | |
103 | ||
104 | q = get_qdisc_kind(k); | |
105 | argc--; argv++; | |
106 | break; | |
107 | } | |
108 | argc--; argv++; | |
109 | } | |
110 | ||
111 | if (k[0]) | |
112 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
113 | if (est.ewma_log) | |
114 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
115 | ||
116 | if (q) { | |
117 | if (q->parse_copt == NULL) { | |
118 | fprintf(stderr, "Error: Qdisc \"%s\" is classless.\n", k); | |
b611d516 | 119 | return 1; |
aba5acdf SH |
120 | } |
121 | if (q->parse_copt(q, argc, argv, &req.n)) | |
b611d516 | 122 | return 1; |
aba5acdf SH |
123 | } else { |
124 | if (argc) { | |
125 | if (matches(*argv, "help") == 0) | |
126 | usage(); | |
127 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc class help\".", *argv); | |
b611d516 | 128 | return -1; |
aba5acdf SH |
129 | } |
130 | } | |
131 | ||
aba5acdf | 132 | if (d[0]) { |
7901660a | 133 | ll_init_map(&rth); |
aba5acdf SH |
134 | |
135 | if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
136 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
b611d516 | 137 | return 1; |
aba5acdf SH |
138 | } |
139 | } | |
140 | ||
7901660a | 141 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) |
b611d516 | 142 | return 2; |
aba5acdf | 143 | |
aba5acdf SH |
144 | return 0; |
145 | } | |
146 | ||
aba5acdf SH |
147 | int filter_ifindex; |
148 | __u32 filter_qdisc; | |
149 | ||
ae665a52 | 150 | int print_class(const struct sockaddr_nl *who, |
50772dc5 | 151 | struct nlmsghdr *n, void *arg) |
aba5acdf SH |
152 | { |
153 | FILE *fp = (FILE*)arg; | |
154 | struct tcmsg *t = NLMSG_DATA(n); | |
155 | int len = n->nlmsg_len; | |
156 | struct rtattr * tb[TCA_MAX+1]; | |
157 | struct qdisc_util *q; | |
158 | char abuf[256]; | |
159 | ||
160 | if (n->nlmsg_type != RTM_NEWTCLASS && n->nlmsg_type != RTM_DELTCLASS) { | |
161 | fprintf(stderr, "Not a class\n"); | |
162 | return 0; | |
163 | } | |
164 | len -= NLMSG_LENGTH(sizeof(*t)); | |
165 | if (len < 0) { | |
166 | fprintf(stderr, "Wrong len %d\n", len); | |
167 | return -1; | |
168 | } | |
169 | if (filter_qdisc && TC_H_MAJ(t->tcm_handle^filter_qdisc)) | |
170 | return 0; | |
171 | ||
172 | memset(tb, 0, sizeof(tb)); | |
173 | parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); | |
174 | ||
175 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 176 | fprintf(stderr, "print_class: NULL kind\n"); |
aba5acdf SH |
177 | return -1; |
178 | } | |
179 | ||
180 | if (n->nlmsg_type == RTM_DELTCLASS) | |
181 | fprintf(fp, "deleted "); | |
182 | ||
183 | abuf[0] = 0; | |
184 | if (t->tcm_handle) { | |
185 | if (filter_qdisc) | |
186 | print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_handle)); | |
187 | else | |
188 | print_tc_classid(abuf, sizeof(abuf), t->tcm_handle); | |
189 | } | |
190 | fprintf(fp, "class %s %s ", (char*)RTA_DATA(tb[TCA_KIND]), abuf); | |
191 | ||
192 | if (filter_ifindex == 0) | |
193 | fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); | |
194 | ||
195 | if (t->tcm_parent == TC_H_ROOT) | |
196 | fprintf(fp, "root "); | |
197 | else { | |
198 | if (filter_qdisc) | |
199 | print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_parent)); | |
200 | else | |
201 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
202 | fprintf(fp, "parent %s ", abuf); | |
203 | } | |
204 | if (t->tcm_info) | |
205 | fprintf(fp, "leaf %x: ", t->tcm_info>>16); | |
206 | q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); | |
207 | if (tb[TCA_OPTIONS]) { | |
208 | if (q && q->print_copt) | |
209 | q->print_copt(q, fp, tb[TCA_OPTIONS]); | |
210 | else | |
211 | fprintf(fp, "[cannot parse class parameters]"); | |
212 | } | |
213 | fprintf(fp, "\n"); | |
214 | if (show_stats) { | |
e5879dc6 | 215 | struct rtattr *xstats = NULL; |
ae665a52 | 216 | |
e5879dc6 | 217 | if (tb[TCA_STATS] || tb[TCA_STATS2]) { |
218 | print_tcstats_attr(fp, tb, " ", &xstats); | |
2c5474ad | 219 | fprintf(fp, "\n"); |
aba5acdf | 220 | } |
e5879dc6 | 221 | if (q && (xstats || tb[TCA_XSTATS]) && q->print_xstats) { |
222 | q->print_xstats(q, fp, xstats ? : tb[TCA_XSTATS]); | |
aba5acdf SH |
223 | fprintf(fp, "\n"); |
224 | } | |
225 | } | |
226 | fflush(fp); | |
227 | return 0; | |
228 | } | |
229 | ||
230 | ||
231 | int tc_class_list(int argc, char **argv) | |
232 | { | |
233 | struct tcmsg t; | |
aba5acdf SH |
234 | char d[16]; |
235 | ||
236 | memset(&t, 0, sizeof(t)); | |
237 | t.tcm_family = AF_UNSPEC; | |
238 | memset(d, 0, sizeof(d)); | |
239 | ||
240 | while (argc > 0) { | |
241 | if (strcmp(*argv, "dev") == 0) { | |
242 | NEXT_ARG(); | |
243 | if (d[0]) | |
244 | duparg("dev", *argv); | |
245 | strncpy(d, *argv, sizeof(d)-1); | |
246 | } else if (strcmp(*argv, "qdisc") == 0) { | |
247 | NEXT_ARG(); | |
248 | if (filter_qdisc) | |
249 | duparg("qdisc", *argv); | |
250 | if (get_qdisc_handle(&filter_qdisc, *argv)) | |
251 | invarg(*argv, "invalid qdisc ID"); | |
252 | } else if (strcmp(*argv, "root") == 0) { | |
253 | if (t.tcm_parent) { | |
254 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
b611d516 | 255 | return -1; |
aba5acdf SH |
256 | } |
257 | t.tcm_parent = TC_H_ROOT; | |
258 | } else if (strcmp(*argv, "parent") == 0) { | |
259 | __u32 handle; | |
260 | if (t.tcm_parent) | |
261 | duparg("parent", *argv); | |
262 | NEXT_ARG(); | |
263 | if (get_tc_classid(&handle, *argv)) | |
264 | invarg(*argv, "invalid parent ID"); | |
265 | t.tcm_parent = handle; | |
266 | } else if (matches(*argv, "help") == 0) { | |
267 | usage(); | |
268 | } else { | |
269 | fprintf(stderr, "What is \"%s\"? Try \"tc class help\".\n", *argv); | |
b611d516 | 270 | return -1; |
aba5acdf SH |
271 | } |
272 | ||
273 | argc--; argv++; | |
274 | } | |
275 | ||
7901660a | 276 | ll_init_map(&rth); |
aba5acdf SH |
277 | |
278 | if (d[0]) { | |
279 | if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
280 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
b611d516 | 281 | return 1; |
aba5acdf SH |
282 | } |
283 | filter_ifindex = t.tcm_ifindex; | |
284 | } | |
285 | ||
7901660a | 286 | if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) { |
aba5acdf | 287 | perror("Cannot send dump request"); |
b611d516 | 288 | return 1; |
aba5acdf SH |
289 | } |
290 | ||
7901660a | 291 | if (rtnl_dump_filter(&rth, print_class, stdout, NULL, NULL) < 0) { |
aba5acdf | 292 | fprintf(stderr, "Dump terminated\n"); |
b611d516 | 293 | return 1; |
aba5acdf SH |
294 | } |
295 | ||
aba5acdf SH |
296 | return 0; |
297 | } | |
298 | ||
299 | int do_class(int argc, char **argv) | |
300 | { | |
301 | if (argc < 1) | |
302 | return tc_class_list(0, NULL); | |
303 | if (matches(*argv, "add") == 0) | |
304 | return tc_class_modify(RTM_NEWTCLASS, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
305 | if (matches(*argv, "change") == 0) | |
306 | return tc_class_modify(RTM_NEWTCLASS, 0, argc-1, argv+1); | |
307 | if (matches(*argv, "replace") == 0) | |
308 | return tc_class_modify(RTM_NEWTCLASS, NLM_F_CREATE, argc-1, argv+1); | |
309 | if (matches(*argv, "delete") == 0) | |
310 | return tc_class_modify(RTM_DELTCLASS, 0, argc-1, argv+1); | |
311 | #if 0 | |
312 | if (matches(*argv, "get") == 0) | |
313 | return tc_class_get(RTM_GETTCLASS, 0, argc-1, argv+1); | |
314 | #endif | |
315 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
316 | || matches(*argv, "lst") == 0) | |
317 | return tc_class_list(argc-1, argv+1); | |
e5d179d8 | 318 | if (matches(*argv, "help") == 0) { |
aba5acdf | 319 | usage(); |
e5d179d8 HT |
320 | return 0; |
321 | } | |
aba5acdf SH |
322 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc class help\".\n", *argv); |
323 | return -1; | |
324 | } |