1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* f_cgroup.c Control Group Classifier
*
* This program is free software; you can distribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Thomas Graf <tgraf@infradead.org>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "utils.h"
#include "tc_util.h"
#include "m_ematch.h"
static void explain(void)
{
fprintf(stderr, "Usage: ... cgroup [ match EMATCH_TREE ]\n");
fprintf(stderr, " [ action ACTION_SPEC ]\n");
}
static int cgroup_parse_opt(struct filter_util *qu, char *handle,
int argc, char **argv, struct nlmsghdr *n)
{
struct tcmsg *t = NLMSG_DATA(n);
struct rtattr *tail;
long h = 0;
if (handle) {
h = strtol(handle, NULL, 0);
if (h == LONG_MIN || h == LONG_MAX) {
fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n",
handle);
return -1;
}
}
t->tcm_handle = h;
tail = (struct rtattr *)(((void *)n)+NLMSG_ALIGN(n->nlmsg_len));
addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0);
while (argc > 0) {
if (matches(*argv, "match") == 0) {
NEXT_ARG();
if (parse_ematch(&argc, &argv, TCA_CGROUP_EMATCHES, n)) {
fprintf(stderr, "Illegal \"ematch\"\n");
return -1;
}
continue;
} else if (matches(*argv, "action") == 0) {
NEXT_ARG();
if (parse_action(&argc, &argv, TCA_CGROUP_ACT, n)) {
fprintf(stderr, "Illegal \"action\"\n");
return -1;
}
continue;
} else if (matches(*argv, "police") == 0) {
NEXT_ARG();
if (parse_police(&argc, &argv, TCA_CGROUP_POLICE, n)) {
fprintf(stderr, "Illegal \"police\"\n");
return -1;
}
continue;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
}
tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail;
return 0;
}
static int cgroup_print_opt(struct filter_util *qu, FILE *f,
struct rtattr *opt, __u32 handle)
{
struct rtattr *tb[TCA_CGROUP_MAX+1];
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_CGROUP_MAX, opt);
if (handle)
fprintf(f, "handle 0x%x ", handle);
if (tb[TCA_CGROUP_EMATCHES])
print_ematch(f, tb[TCA_CGROUP_EMATCHES]);
if (tb[TCA_CGROUP_POLICE]) {
fprintf(f, "\n");
tc_print_police(f, tb[TCA_CGROUP_POLICE]);
}
if (tb[TCA_CGROUP_ACT])
tc_print_action(f, tb[TCA_CGROUP_ACT], 0);
return 0;
}
struct filter_util cgroup_filter_util = {
.id = "cgroup",
.parse_fopt = cgroup_parse_opt,
.print_fopt = cgroup_print_opt,
};
|
