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aba5acdf SH |
1 | /* |
2 | * tc_qdisc.c "tc qdisc". | |
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 | * J Hadi Salim: Extension to ingress | |
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 | ||
11656f1b | 28 | static int usage(void); |
aba5acdf | 29 | |
11656f1b | 30 | static int usage(void) |
aba5acdf SH |
31 | { |
32 | fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | get ] dev STRING\n"); | |
33 | fprintf(stderr, " [ handle QHANDLE ] [ root | ingress | parent CLASSID ]\n"); | |
34 | fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n"); | |
35 | fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); | |
36 | fprintf(stderr, "\n"); | |
37 | fprintf(stderr, " tc qdisc show [ dev STRING ] [ingress]\n"); | |
38 | fprintf(stderr, "Where:\n"); | |
39 | fprintf(stderr, "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"); | |
40 | fprintf(stderr, "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n"); | |
11656f1b | 41 | return -1; |
aba5acdf SH |
42 | } |
43 | ||
44 | int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv) | |
45 | { | |
aba5acdf SH |
46 | struct qdisc_util *q = NULL; |
47 | struct tc_estimator est; | |
48 | char d[16]; | |
49 | char k[16]; | |
f307c24e SH |
50 | struct { |
51 | struct nlmsghdr n; | |
52 | struct tcmsg t; | |
53 | char buf[TCA_BUF_MAX]; | |
54 | } req; | |
aba5acdf SH |
55 | |
56 | memset(&req, 0, sizeof(req)); | |
57 | memset(&est, 0, sizeof(est)); | |
58 | memset(&d, 0, sizeof(d)); | |
59 | memset(&k, 0, sizeof(k)); | |
60 | ||
61 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)); | |
62 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; | |
63 | req.n.nlmsg_type = cmd; | |
64 | req.t.tcm_family = AF_UNSPEC; | |
65 | ||
66 | while (argc > 0) { | |
67 | if (strcmp(*argv, "dev") == 0) { | |
68 | NEXT_ARG(); | |
69 | if (d[0]) | |
70 | duparg("dev", *argv); | |
71 | strncpy(d, *argv, sizeof(d)-1); | |
72 | } else if (strcmp(*argv, "handle") == 0) { | |
73 | __u32 handle; | |
74 | if (req.t.tcm_handle) | |
75 | duparg("handle", *argv); | |
76 | NEXT_ARG(); | |
77 | if (get_qdisc_handle(&handle, *argv)) | |
78 | invarg(*argv, "invalid qdisc ID"); | |
79 | req.t.tcm_handle = handle; | |
80 | } else if (strcmp(*argv, "root") == 0) { | |
81 | if (req.t.tcm_parent) { | |
82 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
11656f1b | 83 | return -1; |
aba5acdf SH |
84 | } |
85 | req.t.tcm_parent = TC_H_ROOT; | |
86 | #ifdef TC_H_INGRESS | |
87 | } else if (strcmp(*argv, "ingress") == 0) { | |
88 | if (req.t.tcm_parent) { | |
89 | fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n"); | |
11656f1b | 90 | return -1; |
aba5acdf SH |
91 | } |
92 | req.t.tcm_parent = TC_H_INGRESS; | |
93 | strncpy(k, "ingress", sizeof(k)-1); | |
94 | q = get_qdisc_kind(k); | |
95 | req.t.tcm_handle = 0xffff0000; | |
96 | ||
97 | argc--; argv++; | |
98 | break; | |
99 | #endif | |
100 | } else if (strcmp(*argv, "parent") == 0) { | |
101 | __u32 handle; | |
102 | NEXT_ARG(); | |
103 | if (req.t.tcm_parent) | |
104 | duparg("parent", *argv); | |
105 | if (get_tc_classid(&handle, *argv)) | |
106 | invarg(*argv, "invalid parent ID"); | |
107 | req.t.tcm_parent = handle; | |
108 | } else if (matches(*argv, "estimator") == 0) { | |
109 | if (parse_estimator(&argc, &argv, &est)) | |
110 | return -1; | |
111 | } else if (matches(*argv, "help") == 0) { | |
112 | usage(); | |
113 | } else { | |
114 | strncpy(k, *argv, sizeof(k)-1); | |
115 | ||
116 | q = get_qdisc_kind(k); | |
117 | argc--; argv++; | |
118 | break; | |
119 | } | |
120 | argc--; argv++; | |
121 | } | |
122 | ||
123 | if (k[0]) | |
124 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
125 | if (est.ewma_log) | |
126 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
127 | ||
128 | if (q) { | |
f453a0d4 SH |
129 | if (!q->parse_qopt) { |
130 | fprintf(stderr, "qdisc '%s' does not support option parsing\n", k); | |
131 | return -1; | |
132 | } | |
aba5acdf | 133 | if (q->parse_qopt(q, argc, argv, &req.n)) |
11656f1b | 134 | return 1; |
aba5acdf SH |
135 | } else { |
136 | if (argc) { | |
137 | if (matches(*argv, "help") == 0) | |
138 | usage(); | |
139 | ||
140 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv); | |
11656f1b | 141 | return -1; |
aba5acdf SH |
142 | } |
143 | } | |
144 | ||
aba5acdf SH |
145 | if (d[0]) { |
146 | int idx; | |
147 | ||
7901660a | 148 | ll_init_map(&rth); |
aba5acdf SH |
149 | |
150 | if ((idx = ll_name_to_index(d)) == 0) { | |
151 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
11656f1b | 152 | return 1; |
aba5acdf SH |
153 | } |
154 | req.t.tcm_ifindex = idx; | |
155 | } | |
156 | ||
7901660a | 157 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) |
11656f1b | 158 | return 2; |
aba5acdf | 159 | |
aba5acdf SH |
160 | return 0; |
161 | } | |
162 | ||
aba5acdf SH |
163 | static int filter_ifindex; |
164 | ||
649b0755 | 165 | static int print_qdisc(const struct sockaddr_nl *who, |
50772dc5 | 166 | struct nlmsghdr *n, |
649b0755 | 167 | void *arg) |
aba5acdf SH |
168 | { |
169 | FILE *fp = (FILE*)arg; | |
170 | struct tcmsg *t = NLMSG_DATA(n); | |
171 | int len = n->nlmsg_len; | |
172 | struct rtattr * tb[TCA_MAX+1]; | |
173 | struct qdisc_util *q; | |
174 | char abuf[256]; | |
175 | ||
176 | if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) { | |
177 | fprintf(stderr, "Not a qdisc\n"); | |
178 | return 0; | |
179 | } | |
180 | len -= NLMSG_LENGTH(sizeof(*t)); | |
181 | if (len < 0) { | |
182 | fprintf(stderr, "Wrong len %d\n", len); | |
183 | return -1; | |
184 | } | |
185 | ||
186 | if (filter_ifindex && filter_ifindex != t->tcm_ifindex) | |
187 | return 0; | |
188 | ||
189 | memset(tb, 0, sizeof(tb)); | |
190 | parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); | |
191 | ||
192 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 193 | fprintf(stderr, "print_qdisc: NULL kind\n"); |
aba5acdf SH |
194 | return -1; |
195 | } | |
196 | ||
197 | if (n->nlmsg_type == RTM_DELQDISC) | |
198 | fprintf(fp, "deleted "); | |
199 | ||
200 | fprintf(fp, "qdisc %s %x: ", (char*)RTA_DATA(tb[TCA_KIND]), t->tcm_handle>>16); | |
201 | if (filter_ifindex == 0) | |
202 | fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); | |
203 | if (t->tcm_parent == TC_H_ROOT) | |
204 | fprintf(fp, "root "); | |
205 | else if (t->tcm_parent) { | |
206 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
207 | fprintf(fp, "parent %s ", abuf); | |
208 | } | |
209 | if (t->tcm_info != 1) { | |
210 | fprintf(fp, "refcnt %d ", t->tcm_info); | |
211 | } | |
2373fde9 SH |
212 | /* pfifo_fast is generic enough to warrant the hardcoding --JHS */ |
213 | ||
214 | if (0 == strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND]))) | |
215 | q = get_qdisc_kind("prio"); | |
216 | else | |
217 | q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); | |
218 | ||
aba5acdf SH |
219 | if (tb[TCA_OPTIONS]) { |
220 | if (q) | |
221 | q->print_qopt(q, fp, tb[TCA_OPTIONS]); | |
222 | else | |
223 | fprintf(fp, "[cannot parse qdisc parameters]"); | |
224 | } | |
225 | fprintf(fp, "\n"); | |
226 | if (show_stats) { | |
e5879dc6 | 227 | struct rtattr *xstats = NULL; |
228 | ||
229 | if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) { | |
230 | print_tcstats_attr(fp, tb, " ", &xstats); | |
649b0755 | 231 | fprintf(fp, "\n"); |
aba5acdf | 232 | } |
649b0755 | 233 | |
e5879dc6 | 234 | if (q && xstats && q->print_xstats) { |
235 | q->print_xstats(q, fp, xstats); | |
aba5acdf SH |
236 | fprintf(fp, "\n"); |
237 | } | |
238 | } | |
239 | fflush(fp); | |
240 | return 0; | |
241 | } | |
242 | ||
243 | ||
244 | int tc_qdisc_list(int argc, char **argv) | |
245 | { | |
246 | struct tcmsg t; | |
aba5acdf SH |
247 | char d[16]; |
248 | ||
249 | memset(&t, 0, sizeof(t)); | |
250 | t.tcm_family = AF_UNSPEC; | |
251 | memset(&d, 0, sizeof(d)); | |
252 | ||
253 | while (argc > 0) { | |
254 | if (strcmp(*argv, "dev") == 0) { | |
255 | NEXT_ARG(); | |
256 | strncpy(d, *argv, sizeof(d)-1); | |
257 | #ifdef TC_H_INGRESS | |
258 | } else if (strcmp(*argv, "ingress") == 0) { | |
259 | if (t.tcm_parent) { | |
260 | fprintf(stderr, "Duplicate parent ID\n"); | |
261 | usage(); | |
262 | } | |
263 | t.tcm_parent = TC_H_INGRESS; | |
264 | #endif | |
265 | } else if (matches(*argv, "help") == 0) { | |
266 | usage(); | |
267 | } else { | |
268 | fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv); | |
269 | return -1; | |
270 | } | |
271 | ||
272 | argc--; argv++; | |
273 | } | |
274 | ||
7901660a | 275 | ll_init_map(&rth); |
aba5acdf SH |
276 | |
277 | if (d[0]) { | |
278 | if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
279 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
11656f1b | 280 | return 1; |
aba5acdf SH |
281 | } |
282 | filter_ifindex = t.tcm_ifindex; | |
283 | } | |
284 | ||
7901660a | 285 | if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { |
aba5acdf | 286 | perror("Cannot send dump request"); |
11656f1b | 287 | return 1; |
aba5acdf SH |
288 | } |
289 | ||
7901660a | 290 | if (rtnl_dump_filter(&rth, print_qdisc, stdout, NULL, NULL) < 0) { |
aba5acdf | 291 | fprintf(stderr, "Dump terminated\n"); |
11656f1b | 292 | return 1; |
aba5acdf SH |
293 | } |
294 | ||
aba5acdf SH |
295 | return 0; |
296 | } | |
297 | ||
298 | int do_qdisc(int argc, char **argv) | |
299 | { | |
300 | if (argc < 1) | |
301 | return tc_qdisc_list(0, NULL); | |
302 | if (matches(*argv, "add") == 0) | |
303 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
304 | if (matches(*argv, "change") == 0) | |
305 | return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1); | |
306 | if (matches(*argv, "replace") == 0) | |
307 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); | |
308 | if (matches(*argv, "link") == 0) | |
309 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1); | |
310 | if (matches(*argv, "delete") == 0) | |
311 | return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1); | |
312 | #if 0 | |
313 | if (matches(*argv, "get") == 0) | |
314 | return tc_qdisc_get(RTM_GETQDISC, 0, argc-1, argv+1); | |
315 | #endif | |
316 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
317 | || matches(*argv, "lst") == 0) | |
318 | return tc_qdisc_list(argc-1, argv+1); | |
319 | if (matches(*argv, "help") == 0) | |
320 | usage(); | |
321 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv); | |
322 | return -1; | |
323 | } |