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2 * tc_qdisc.c "tc qdisc".
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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * J Hadi Salim: Extension to ingress
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
26 #include "tc_common.h"
28 static void usage(void) __attribute__((noreturn
));
30 static void usage(void)
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");
44 int tc_qdisc_modify(int cmd
, unsigned flags
, int argc
, char **argv
)
46 struct rtnl_handle rth
;
52 struct qdisc_util
*q
= NULL
;
53 struct tc_estimator est
;
57 memset(&req
, 0, sizeof(req
));
58 memset(&est
, 0, sizeof(est
));
59 memset(&d
, 0, sizeof(d
));
60 memset(&k
, 0, sizeof(k
));
62 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct tcmsg
));
63 req
.n
.nlmsg_flags
= NLM_F_REQUEST
|flags
;
64 req
.n
.nlmsg_type
= cmd
;
65 req
.t
.tcm_family
= AF_UNSPEC
;
68 if (strcmp(*argv
, "dev") == 0) {
72 strncpy(d
, *argv
, sizeof(d
)-1);
73 } else if (strcmp(*argv
, "handle") == 0) {
76 duparg("handle", *argv
);
78 if (get_qdisc_handle(&handle
, *argv
))
79 invarg(*argv
, "invalid qdisc ID");
80 req
.t
.tcm_handle
= handle
;
81 } else if (strcmp(*argv
, "root") == 0) {
82 if (req
.t
.tcm_parent
) {
83 fprintf(stderr
, "Error: \"root\" is duplicate parent ID\n");
86 req
.t
.tcm_parent
= TC_H_ROOT
;
88 } else if (strcmp(*argv
, "ingress") == 0) {
89 if (req
.t
.tcm_parent
) {
90 fprintf(stderr
, "Error: \"ingress\" is a duplicate parent ID\n");
93 req
.t
.tcm_parent
= TC_H_INGRESS
;
94 strncpy(k
, "ingress", sizeof(k
)-1);
95 q
= get_qdisc_kind(k
);
96 req
.t
.tcm_handle
= 0xffff0000;
101 } else if (strcmp(*argv
, "parent") == 0) {
104 if (req
.t
.tcm_parent
)
105 duparg("parent", *argv
);
106 if (get_tc_classid(&handle
, *argv
))
107 invarg(*argv
, "invalid parent ID");
108 req
.t
.tcm_parent
= handle
;
109 } else if (matches(*argv
, "estimator") == 0) {
110 if (parse_estimator(&argc
, &argv
, &est
))
112 } else if (matches(*argv
, "help") == 0) {
115 strncpy(k
, *argv
, sizeof(k
)-1);
117 q
= get_qdisc_kind(k
);
125 addattr_l(&req
.n
, sizeof(req
), TCA_KIND
, k
, strlen(k
)+1);
127 addattr_l(&req
.n
, sizeof(req
), TCA_RATE
, &est
, sizeof(est
));
130 if (q
->parse_qopt(q
, argc
, argv
, &req
.n
))
134 if (matches(*argv
, "help") == 0)
137 fprintf(stderr
, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv
);
142 if (rtnl_open(&rth
, 0) < 0) {
143 fprintf(stderr
, "Cannot open rtnetlink\n");
152 if ((idx
= ll_name_to_index(d
)) == 0) {
153 fprintf(stderr
, "Cannot find device \"%s\"\n", d
);
156 req
.t
.tcm_ifindex
= idx
;
159 if (rtnl_talk(&rth
, &req
.n
, 0, 0, NULL
, NULL
, NULL
) < 0)
166 void print_tcstats(FILE *fp
, struct tc_stats
*st
)
170 fprintf(fp
, " Sent %llu bytes %u pkts (dropped %u, overlimits %u) ",
171 (unsigned long long)st
->bytes
, st
->packets
, st
->drops
, st
->overlimits
);
172 if (st
->bps
|| st
->pps
|| st
->qlen
|| st
->backlog
) {
174 if (st
->bps
|| st
->pps
) {
175 fprintf(fp
, "rate ");
177 fprintf(fp
, "%s ", sprint_rate(st
->bps
, b1
));
179 fprintf(fp
, "%upps ", st
->pps
);
181 if (st
->qlen
|| st
->backlog
) {
182 fprintf(fp
, "backlog ");
184 fprintf(fp
, "%s ", sprint_size(st
->backlog
, b1
));
186 fprintf(fp
, "%up ", st
->qlen
);
191 static int filter_ifindex
;
193 int print_qdisc(struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
195 FILE *fp
= (FILE*)arg
;
196 struct tcmsg
*t
= NLMSG_DATA(n
);
197 int len
= n
->nlmsg_len
;
198 struct rtattr
* tb
[TCA_MAX
+1];
199 struct qdisc_util
*q
;
202 if (n
->nlmsg_type
!= RTM_NEWQDISC
&& n
->nlmsg_type
!= RTM_DELQDISC
) {
203 fprintf(stderr
, "Not a qdisc\n");
206 len
-= NLMSG_LENGTH(sizeof(*t
));
208 fprintf(stderr
, "Wrong len %d\n", len
);
212 if (filter_ifindex
&& filter_ifindex
!= t
->tcm_ifindex
)
215 memset(tb
, 0, sizeof(tb
));
216 parse_rtattr(tb
, TCA_MAX
, TCA_RTA(t
), len
);
218 if (tb
[TCA_KIND
] == NULL
) {
219 fprintf(stderr
, "NULL kind\n");
223 if (n
->nlmsg_type
== RTM_DELQDISC
)
224 fprintf(fp
, "deleted ");
226 fprintf(fp
, "qdisc %s %x: ", (char*)RTA_DATA(tb
[TCA_KIND
]), t
->tcm_handle
>>16);
227 if (filter_ifindex
== 0)
228 fprintf(fp
, "dev %s ", ll_index_to_name(t
->tcm_ifindex
));
229 if (t
->tcm_parent
== TC_H_ROOT
)
230 fprintf(fp
, "root ");
231 else if (t
->tcm_parent
) {
232 print_tc_classid(abuf
, sizeof(abuf
), t
->tcm_parent
);
233 fprintf(fp
, "parent %s ", abuf
);
235 if (t
->tcm_info
!= 1) {
236 fprintf(fp
, "refcnt %d ", t
->tcm_info
);
238 q
= get_qdisc_kind(RTA_DATA(tb
[TCA_KIND
]));
239 if (tb
[TCA_OPTIONS
]) {
241 q
->print_qopt(q
, fp
, tb
[TCA_OPTIONS
]);
243 fprintf(fp
, "[cannot parse qdisc parameters]");
248 if (RTA_PAYLOAD(tb
[TCA_STATS
]) < sizeof(struct tc_stats
))
249 fprintf(fp
, "statistics truncated");
252 memcpy(&st
, RTA_DATA(tb
[TCA_STATS
]), sizeof(st
));
253 print_tcstats(fp
, &st
);
257 if (q
&& tb
[TCA_XSTATS
]) {
258 q
->print_xstats(q
, fp
, tb
[TCA_XSTATS
]);
267 int tc_qdisc_list(int argc
, char **argv
)
270 struct rtnl_handle rth
;
273 memset(&t
, 0, sizeof(t
));
274 t
.tcm_family
= AF_UNSPEC
;
275 memset(&d
, 0, sizeof(d
));
278 if (strcmp(*argv
, "dev") == 0) {
280 strncpy(d
, *argv
, sizeof(d
)-1);
282 } else if (strcmp(*argv
, "ingress") == 0) {
284 fprintf(stderr
, "Duplicate parent ID\n");
287 t
.tcm_parent
= TC_H_INGRESS
;
289 } else if (matches(*argv
, "help") == 0) {
292 fprintf(stderr
, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv
);
299 if (rtnl_open(&rth
, 0) < 0) {
300 fprintf(stderr
, "Cannot open rtnetlink\n");
307 if ((t
.tcm_ifindex
= ll_name_to_index(d
)) == 0) {
308 fprintf(stderr
, "Cannot find device \"%s\"\n", d
);
311 filter_ifindex
= t
.tcm_ifindex
;
314 if (rtnl_dump_request(&rth
, RTM_GETQDISC
, &t
, sizeof(t
)) < 0) {
315 perror("Cannot send dump request");
319 if (rtnl_dump_filter(&rth
, print_qdisc
, stdout
, NULL
, NULL
) < 0) {
320 fprintf(stderr
, "Dump terminated\n");
328 int do_qdisc(int argc
, char **argv
)
331 return tc_qdisc_list(0, NULL
);
332 if (matches(*argv
, "add") == 0)
333 return tc_qdisc_modify(RTM_NEWQDISC
, NLM_F_EXCL
|NLM_F_CREATE
, argc
-1, argv
+1);
334 if (matches(*argv
, "change") == 0)
335 return tc_qdisc_modify(RTM_NEWQDISC
, 0, argc
-1, argv
+1);
336 if (matches(*argv
, "replace") == 0)
337 return tc_qdisc_modify(RTM_NEWQDISC
, NLM_F_CREATE
|NLM_F_REPLACE
, argc
-1, argv
+1);
338 if (matches(*argv
, "link") == 0)
339 return tc_qdisc_modify(RTM_NEWQDISC
, NLM_F_REPLACE
, argc
-1, argv
+1);
340 if (matches(*argv
, "delete") == 0)
341 return tc_qdisc_modify(RTM_DELQDISC
, 0, argc
-1, argv
+1);
343 if (matches(*argv
, "get") == 0)
344 return tc_qdisc_get(RTM_GETQDISC
, 0, argc
-1, argv
+1);
346 if (matches(*argv
, "list") == 0 || matches(*argv
, "show") == 0
347 || matches(*argv
, "lst") == 0)
348 return tc_qdisc_list(argc
-1, argv
+1);
349 if (matches(*argv
, "help") == 0)
351 fprintf(stderr
, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv
);