Thomas Graf | ff213c4 | 2009-04-09 07:01:51 -0400 | [diff] [blame] | 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 | { |
Jamal Hadi Salim | 863ecb0 | 2014-10-06 07:41:21 -0400 | [diff] [blame] | 21 | fprintf(stderr, "Usage: ... cgroup [ match EMATCH_TREE ]\n"); |
| 22 | fprintf(stderr, " [ action ACTION_SPEC ]\n"); |
Thomas Graf | ff213c4 | 2009-04-09 07:01:51 -0400 | [diff] [blame] | 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 | } |
Thomas Graf | ff213c4 | 2009-04-09 07:01:51 -0400 | [diff] [blame] | 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 | }; |