]>
Commit | Line | Data |
---|---|---|
ff213c4b TG |
1 | /* |
2 | * f_cgroup.c Control Group Classifier | |
3 | * | |
4 | * This program is free software; you can distribute 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: Thomas Graf <tgraf@infradead.org> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include "utils.h" | |
16 | #include "tc_util.h" | |
17 | #include "m_ematch.h" | |
18 | ||
19 | static void explain(void) | |
20 | { | |
863ecb04 JHS |
21 | fprintf(stderr, "Usage: ... cgroup [ match EMATCH_TREE ]\n"); |
22 | fprintf(stderr, " [ action ACTION_SPEC ]\n"); | |
ff213c4b TG |
23 | } |
24 | ||
25 | static int cgroup_parse_opt(struct filter_util *qu, char *handle, | |
26 | int argc, char **argv, struct nlmsghdr *n) | |
27 | { | |
28 | struct tcmsg *t = NLMSG_DATA(n); | |
29 | struct rtattr *tail; | |
30 | long h = 0; | |
31 | ||
32 | if (handle) { | |
33 | h = strtol(handle, NULL, 0); | |
34 | if (h == LONG_MIN || h == LONG_MAX) { | |
35 | fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n", | |
36 | handle); | |
37 | return -1; | |
38 | } | |
39 | } | |
40 | ||
41 | t->tcm_handle = h; | |
42 | ||
43 | tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len)); | |
44 | addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0); | |
45 | ||
46 | while (argc > 0) { | |
47 | if (matches(*argv, "match") == 0) { | |
48 | NEXT_ARG(); | |
49 | if (parse_ematch(&argc, &argv, TCA_CGROUP_EMATCHES, n)) { | |
50 | fprintf(stderr, "Illegal \"ematch\"\n"); | |
51 | return -1; | |
52 | } | |
53 | continue; | |
54 | } else if (matches(*argv, "action") == 0) { | |
55 | NEXT_ARG(); | |
56 | if (parse_action(&argc, &argv, TCA_CGROUP_ACT, n)) { | |
57 | fprintf(stderr, "Illegal \"action\"\n"); | |
58 | return -1; | |
59 | } | |
60 | continue; | |
61 | ||
62 | } else if (matches(*argv, "police") == 0) { | |
63 | NEXT_ARG(); | |
64 | if (parse_police(&argc, &argv, TCA_CGROUP_POLICE, n)) { | |
65 | fprintf(stderr, "Illegal \"police\"\n"); | |
66 | return -1; | |
67 | } | |
68 | continue; | |
69 | } else if (strcmp(*argv, "help") == 0) { | |
70 | explain(); | |
71 | return -1; | |
72 | } else { | |
73 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
74 | explain(); | |
75 | return -1; | |
76 | } | |
ff213c4b TG |
77 | } |
78 | ||
79 | tail->rta_len = (((void*)n)+n->nlmsg_len) - (void*)tail; | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int cgroup_print_opt(struct filter_util *qu, FILE *f, | |
84 | struct rtattr *opt, __u32 handle) | |
85 | { | |
86 | struct rtattr *tb[TCA_CGROUP_MAX+1]; | |
87 | ||
88 | if (opt == NULL) | |
89 | return 0; | |
90 | ||
91 | parse_rtattr_nested(tb, TCA_CGROUP_MAX, opt); | |
92 | ||
93 | if (handle) | |
94 | fprintf(f, "handle 0x%x ", handle); | |
95 | ||
96 | if (tb[TCA_CGROUP_EMATCHES]) | |
97 | print_ematch(f, tb[TCA_CGROUP_EMATCHES]); | |
98 | ||
99 | if (tb[TCA_CGROUP_POLICE]) { | |
100 | fprintf(f, "\n"); | |
101 | tc_print_police(f, tb[TCA_CGROUP_POLICE]); | |
102 | } | |
103 | ||
104 | if (tb[TCA_CGROUP_ACT]) | |
105 | tc_print_action(f, tb[TCA_CGROUP_ACT]); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | struct filter_util cgroup_filter_util = { | |
111 | .id = "cgroup", | |
112 | .parse_fopt = cgroup_parse_opt, | |
113 | .print_fopt = cgroup_print_opt, | |
114 | }; |