]>
Commit | Line | Data |
---|---|---|
620eff3c | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <dlezcano at fr.ibm.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #define _GNU_SOURCE | |
24 | #include <stdio.h> | |
25 | #undef _GNU_SOURCE | |
26 | #include <stdlib.h> | |
27 | #include <errno.h> | |
28 | #include <mntent.h> | |
29 | #include <unistd.h> | |
30 | #include <string.h> | |
31 | #include <fcntl.h> | |
32 | #include <sys/types.h> | |
33 | #include <sys/stat.h> | |
34 | #include <sys/param.h> | |
35 | #include <sys/inotify.h> | |
36 | #include <netinet/in.h> | |
37 | #include <net/if.h> | |
38 | ||
39 | #include <lxc.h> | |
40 | ||
41 | #define MAXPRIOLEN 24 | |
42 | #define MTAB "/etc/mtab" | |
43 | ||
44 | static int get_cgroup_mount(const char *mtab, char *mnt) | |
45 | { | |
46 | struct mntent *mntent; | |
47 | FILE *file = NULL; | |
48 | int err = -1; | |
49 | ||
50 | file = setmntent(mtab, "r"); | |
51 | if (!file) { | |
52 | lxc_log_syserror("failed to open %s", mtab); | |
53 | goto out; | |
54 | } | |
55 | ||
56 | while ((mntent = getmntent(file))) { | |
57 | if (strcmp(mntent->mnt_fsname, "cgroup")) | |
58 | continue; | |
59 | strcpy(mnt, mntent->mnt_dir); | |
60 | err = 0; | |
61 | break; | |
62 | }; | |
63 | ||
64 | fclose(file); | |
65 | out: | |
66 | return err; | |
67 | } | |
68 | ||
69 | int lxc_link_nsgroup(const char *name, pid_t pid) | |
70 | { | |
71 | char *lxc, *nsgroup, cgroup[MAXPATHLEN]; | |
72 | int ret; | |
73 | ||
74 | if (get_cgroup_mount(MTAB, cgroup)) { | |
75 | lxc_log_info("cgroup is not mounted"); | |
76 | return -1; | |
77 | } | |
78 | ||
79 | asprintf(&lxc, LXCPATH "/%s/nsgroup", name); | |
80 | asprintf(&nsgroup, "%s/%d", cgroup, pid); | |
81 | ||
82 | unlink(lxc); | |
83 | ret = symlink(nsgroup, lxc); | |
84 | if (ret) | |
85 | lxc_log_syserror("failed to create symlink %s->%s", | |
86 | nsgroup, lxc); | |
87 | free(lxc); | |
88 | free(nsgroup); | |
89 | return ret; | |
90 | } | |
91 | ||
92 | int lxc_unlink_nsgroup(const char *name) | |
93 | { | |
94 | char *nsgroup; | |
95 | int ret; | |
96 | ||
97 | asprintf(&nsgroup, LXCPATH "/%s/nsgroup", name); | |
98 | ret = unlink(nsgroup); | |
99 | free(nsgroup); | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
c2cc9f0a | 104 | int lxc_cgroup_set_priority(const char *name, int priority) |
620eff3c | 105 | { |
106 | int fd; | |
107 | char *path = NULL, *prio = NULL; | |
108 | ||
109 | asprintf(&path, LXCPATH "/%s/nsgroup/cpu.shares", name); | |
110 | ||
111 | fd = open(path, O_WRONLY); | |
112 | if (fd < 0) { | |
113 | lxc_log_syserror("failed to open '%s'", path); | |
114 | goto out; | |
115 | } | |
116 | ||
117 | asprintf(&prio, "%d", priority); | |
118 | ||
119 | if (write(fd, prio, strlen(prio) + 1) < 0) { | |
120 | lxc_log_syserror("failed to write to '%s'", path); | |
121 | close(fd); | |
122 | goto out; | |
123 | } | |
124 | ||
125 | close(fd); | |
126 | out: | |
127 | free(path); | |
128 | free(prio); | |
129 | return 0; | |
130 | } | |
131 | ||
c2cc9f0a | 132 | int lxc_cgroup_get_priority(const char *name, int *priority) |
620eff3c | 133 | { |
134 | int fd, ret = -1; | |
135 | char *path, prio[MAXPRIOLEN]; | |
136 | ||
137 | asprintf(&path, LXCPATH "/%s/nsgroup/cpu.shares", name); | |
138 | ||
139 | fd = open(path, O_RDONLY); | |
140 | if (fd < 0) { | |
141 | lxc_log_syserror("failed to open '%s'", path); | |
142 | goto out; | |
143 | } | |
144 | ||
145 | if (read(fd, prio, MAXPRIOLEN) < 0) { | |
146 | lxc_log_syserror("failed to read from '%s'", path); | |
147 | close(fd); | |
148 | goto out; | |
149 | } | |
150 | ||
151 | close(fd); | |
152 | *priority = atoi(prio); | |
153 | ||
154 | ret = 0; | |
155 | out: | |
156 | free(path); | |
187d3a35 | 157 | return ret; |
620eff3c | 158 | } |
159 | ||
160 | int lxc_set_memory(const char *name, size_t memmax) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | ||
165 | int lxc_get_memory(const char *name, size_t *memmax) | |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
170 | int lxc_get_memstat(const char *name, struct lxc_mem_stat *memstat) | |
171 | { | |
172 | return 0; | |
173 | } | |
174 | ||
175 | int lxc_set_cpuset(const char *name, long *cpumask, int len, int shared) | |
176 | { | |
177 | return 0; | |
178 | } | |
179 | ||
180 | int lxc_get_cpuset(const char *name, long *cpumask, int len, int *shared) | |
181 | { | |
182 | return 0; | |
183 | } | |
184 | ||
185 | int lxc_get_cpu_usage(const char *name, long long *usage) | |
186 | { | |
187 | return 0; | |
188 | } |