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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include "cgroup-attr.h" | |
23 | #include "cgroup-util.h" | |
24 | #include "list.h" | |
25 | ||
26 | int cgroup_attribute_apply(CGroupAttribute *a, CGroupBonding *b) { | |
27 | int r; | |
28 | char *path = NULL; | |
29 | char *v = NULL; | |
30 | ||
31 | assert(a); | |
32 | ||
33 | b = cgroup_bonding_find_list(b, a->controller); | |
34 | if (!b) | |
35 | return 0; | |
36 | ||
37 | if (a->map_callback) { | |
38 | r = a->map_callback(a->controller, a->name, a->value, &v); | |
39 | if (r < 0) | |
40 | return r; | |
41 | } | |
42 | ||
43 | r = cg_get_path(a->controller, b->path, a->name, &path); | |
44 | if (r < 0) { | |
45 | free(v); | |
46 | return r; | |
47 | } | |
48 | ||
49 | r = write_one_line_file(path, v ? v : a->value); | |
50 | if (r < 0) | |
51 | log_warning("Failed to write '%s' to %s: %s", v ? v : a->value, path, strerror(-r)); | |
52 | ||
53 | free(path); | |
54 | free(v); | |
55 | ||
56 | return r; | |
57 | } | |
58 | ||
59 | int cgroup_attribute_apply_list(CGroupAttribute *first, CGroupBonding *b) { | |
60 | CGroupAttribute *a; | |
61 | int r = 0; | |
62 | ||
63 | LIST_FOREACH(by_unit, a, first) { | |
64 | int k; | |
65 | ||
66 | k = cgroup_attribute_apply(a, b); | |
67 | if (r == 0) | |
68 | r = k; | |
69 | } | |
70 | ||
71 | return r; | |
72 | } | |
73 | ||
74 | CGroupAttribute *cgroup_attribute_find_list(CGroupAttribute *first, const char *controller, const char *name) { | |
75 | CGroupAttribute *a; | |
76 | ||
77 | assert(controller); | |
78 | assert(name); | |
79 | ||
80 | LIST_FOREACH(by_unit, a, first) | |
81 | if (streq(a->controller, controller) && | |
82 | streq(a->name, name)) | |
83 | return a; | |
84 | ||
85 | return NULL; | |
86 | } | |
87 | ||
88 | static void cgroup_attribute_free(CGroupAttribute *a) { | |
89 | assert(a); | |
90 | ||
91 | free(a->controller); | |
92 | free(a->name); | |
93 | free(a->value); | |
94 | free(a); | |
95 | } | |
96 | ||
97 | void cgroup_attribute_free_list(CGroupAttribute *first) { | |
98 | CGroupAttribute *a, *n; | |
99 | ||
100 | LIST_FOREACH_SAFE(by_unit, a, n, first) | |
101 | cgroup_attribute_free(a); | |
102 | } |