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Merge pull request #1955 from flx42/confile-fix-misc-issues
[mirror_lxc.git] / src / lxc / confile.c
1 /*
2 * lxc: linux Container library
3 * (C) Copyright IBM Corp. 2007, 2008
4 *
5 * Authors:
6 * Daniel Lezcano <daniel.lezcano at free.fr>
7 * Serge Hallyn <serge@hallyn.com>
8 * Christian Brauner <christian.brauner@ubuntu.com>
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #define _GNU_SOURCE
26 #define __STDC_FORMAT_MACROS
27 #include <ctype.h>
28 #include <dirent.h>
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <inttypes.h>
32 #include <signal.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <syslog.h>
37 #include <time.h>
38 #include <unistd.h>
39 #include <arpa/inet.h>
40 #include <net/if.h>
41 #include <netinet/in.h>
42 #include <sys/param.h>
43 #include <sys/stat.h>
44 #include <sys/types.h>
45 #include <sys/utsname.h>
46
47 #include "conf.h"
48 #include "config.h"
49 #include "confile.h"
50 #include "confile_legacy.h"
51 #include "confile_utils.h"
52 #include "log.h"
53 #include "lxcseccomp.h"
54 #include "network.h"
55 #include "parse.h"
56 #include "storage.h"
57 #include "utils.h"
58
59 #if HAVE_IFADDRS_H
60 #include <ifaddrs.h>
61 #else
62 #include <../include/ifaddrs.h>
63 #endif
64
65 #if HAVE_SYS_PERSONALITY_H
66 #include <sys/personality.h>
67 #endif
68
69 lxc_log_define(lxc_confile, lxc);
70
71 #define lxc_config_define(name) \
72 static int set_config_##name(const char *, const char *, \
73 struct lxc_conf *, void *); \
74 static int get_config_##name(const char *, char *, int, \
75 struct lxc_conf *, void *); \
76 static int clr_config_##name(const char *, struct lxc_conf *, void *);
77
78 lxc_config_define(autodev);
79 lxc_config_define(apparmor_allow_incomplete);
80 lxc_config_define(apparmor_profile);
81 lxc_config_define(cap_drop);
82 lxc_config_define(cap_keep);
83 lxc_config_define(cgroup_controller);
84 lxc_config_define(cgroup_dir);
85 lxc_config_define(console_logfile);
86 lxc_config_define(console_rotate);
87 lxc_config_define(console_buffer_logfile);
88 lxc_config_define(console_buffer_size);
89 lxc_config_define(console_path);
90 lxc_config_define(environment);
91 lxc_config_define(ephemeral);
92 lxc_config_define(execute_cmd);
93 lxc_config_define(group);
94 lxc_config_define(hooks);
95 lxc_config_define(idmaps);
96 lxc_config_define(includefiles);
97 lxc_config_define(init_cmd);
98 lxc_config_define(init_gid);
99 lxc_config_define(init_uid);
100 lxc_config_define(log_file);
101 lxc_config_define(log_level);
102 lxc_config_define(log_syslog);
103 lxc_config_define(monitor);
104 lxc_config_define(mount);
105 lxc_config_define(mount_auto);
106 lxc_config_define(mount_fstab);
107 lxc_config_define(namespace);
108 lxc_config_define(net);
109 lxc_config_define(net_flags);
110 lxc_config_define(net_hwaddr);
111 lxc_config_define(net_ipv4_address);
112 lxc_config_define(net_ipv4_gateway);
113 lxc_config_define(net_ipv6_address);
114 lxc_config_define(net_ipv6_gateway);
115 lxc_config_define(net_link);
116 lxc_config_define(net_macvlan_mode);
117 lxc_config_define(net_mtu);
118 lxc_config_define(net_name);
119 lxc_config_define(net_nic);
120 lxc_config_define(net_script_down);
121 lxc_config_define(net_script_up);
122 lxc_config_define(net_type);
123 lxc_config_define(net_veth_pair);
124 lxc_config_define(net_vlan_id);
125 lxc_config_define(no_new_privs);
126 lxc_config_define(noop);
127 lxc_config_define(personality);
128 lxc_config_define(prlimit);
129 lxc_config_define(pty_max);
130 lxc_config_define(rootfs_backend);
131 lxc_config_define(rootfs_mount);
132 lxc_config_define(rootfs_options);
133 lxc_config_define(rootfs_path);
134 lxc_config_define(seccomp_profile);
135 lxc_config_define(selinux_context);
136 lxc_config_define(signal_halt);
137 lxc_config_define(signal_reboot);
138 lxc_config_define(signal_stop);
139 lxc_config_define(start);
140 lxc_config_define(tty_max);
141 lxc_config_define(tty_dir);
142 lxc_config_define(uts_name);
143
144 static struct lxc_config_t config[] = {
145 /* REMOVE in LXC 3.0 */
146 { "lxc.arch", false, set_config_personality, get_config_personality, clr_config_personality, },
147 { "lxc.apparmor.profile", false, set_config_apparmor_profile, get_config_apparmor_profile, clr_config_apparmor_profile, },
148 { "lxc.apparmor.allow_incomplete", false, set_config_apparmor_allow_incomplete, get_config_apparmor_allow_incomplete, clr_config_apparmor_allow_incomplete, },
149 { "lxc.autodev", false, set_config_autodev, get_config_autodev, clr_config_autodev, },
150 { "lxc.cap.drop", false, set_config_cap_drop, get_config_cap_drop, clr_config_cap_drop, },
151 { "lxc.cap.keep", false, set_config_cap_keep, get_config_cap_keep, clr_config_cap_keep, },
152 { "lxc.cgroup.dir", false, set_config_cgroup_dir, get_config_cgroup_dir, clr_config_cgroup_dir, },
153 { "lxc.cgroup", false, set_config_cgroup_controller, get_config_cgroup_controller, clr_config_cgroup_controller, },
154 { "lxc.console.buffer.logfile", false, set_config_console_buffer_logfile, get_config_console_buffer_logfile, clr_config_console_buffer_logfile, },
155 { "lxc.console.buffer.size", false, set_config_console_buffer_size, get_config_console_buffer_size, clr_config_console_buffer_size, },
156 { "lxc.console.logfile", false, set_config_console_logfile, get_config_console_logfile, clr_config_console_logfile, },
157 { "lxc.console.path", false, set_config_console_path, get_config_console_path, clr_config_console_path, },
158 { "lxc.console.rotate", false, set_config_console_rotate, get_config_console_rotate, clr_config_console_rotate, },
159 { "lxc.environment", false, set_config_environment, get_config_environment, clr_config_environment, },
160 { "lxc.ephemeral", false, set_config_ephemeral, get_config_ephemeral, clr_config_ephemeral, },
161 { "lxc.execute.cmd", false, set_config_execute_cmd, get_config_execute_cmd, clr_config_execute_cmd, },
162 { "lxc.group", false, set_config_group, get_config_group, clr_config_group, },
163 { "lxc.hook.autodev", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
164 { "lxc.hook.clone", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
165 { "lxc.hook.destroy", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
166 { "lxc.hook.mount", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
167 { "lxc.hook.post-stop", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
168 { "lxc.hook.start-host", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
169 { "lxc.hook.pre-start", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
170 { "lxc.hook.pre-mount", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
171 { "lxc.hook.start", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
172 { "lxc.hook.stop", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
173 { "lxc.hook", false, set_config_hooks, get_config_hooks, clr_config_hooks, },
174 { "lxc.idmap", false, set_config_idmaps, get_config_idmaps, clr_config_idmaps, },
175 { "lxc.include", false, set_config_includefiles, get_config_includefiles, clr_config_includefiles, },
176 { "lxc.init.cmd", false, set_config_init_cmd, get_config_init_cmd, clr_config_init_cmd, },
177 { "lxc.init.gid", false, set_config_init_gid, get_config_init_gid, clr_config_init_gid, },
178 { "lxc.init.uid", false, set_config_init_uid, get_config_init_uid, clr_config_init_uid, },
179 { "lxc.log.file", false, set_config_log_file, get_config_log_file, clr_config_log_file, },
180 { "lxc.log.level", false, set_config_log_level, get_config_log_level, clr_config_log_level, },
181 { "lxc.log.syslog", false, set_config_log_syslog, get_config_log_syslog, clr_config_log_syslog, },
182 { "lxc.monitor.unshare", false, set_config_monitor, get_config_monitor, clr_config_monitor, },
183 { "lxc.mount.auto", false, set_config_mount_auto, get_config_mount_auto, clr_config_mount_auto, },
184 { "lxc.mount.entry", false, set_config_mount, get_config_mount, clr_config_mount, },
185 { "lxc.mount.fstab", false, set_config_mount_fstab, get_config_mount_fstab, clr_config_mount_fstab, },
186 { "lxc.namespace", false, set_config_namespace, get_config_namespace, clr_config_namespace, },
187
188 /* [START]: REMOVE IN LXC 3.0 */
189 { "lxc.network.type", true, set_config_network_legacy_type, get_config_network_legacy_item, clr_config_network_legacy_item, },
190 { "lxc.network.flags", true, set_config_network_legacy_flags, get_config_network_legacy_item, clr_config_network_legacy_item, },
191 { "lxc.network.link", true, set_config_network_legacy_link, get_config_network_legacy_item, clr_config_network_legacy_item, },
192 { "lxc.network.name", true, set_config_network_legacy_name, get_config_network_legacy_item, clr_config_network_legacy_item, },
193 { "lxc.network.macvlan.mode", true, set_config_network_legacy_macvlan_mode, get_config_network_legacy_item, clr_config_network_legacy_item, },
194 { "lxc.network.veth.pair", true, set_config_network_legacy_veth_pair, get_config_network_legacy_item, clr_config_network_legacy_item, },
195 { "lxc.network.script.up", true, set_config_network_legacy_script_up, get_config_network_legacy_item, clr_config_network_legacy_item, },
196 { "lxc.network.script.down", true, set_config_network_legacy_script_down, get_config_network_legacy_item, clr_config_network_legacy_item, },
197 { "lxc.network.hwaddr", true, set_config_network_legacy_hwaddr, get_config_network_legacy_item, clr_config_network_legacy_item, },
198 { "lxc.network.mtu", true, set_config_network_legacy_mtu, get_config_network_legacy_item, clr_config_network_legacy_item, },
199 { "lxc.network.vlan.id", true, set_config_network_legacy_vlan_id, get_config_network_legacy_item, clr_config_network_legacy_item, },
200 { "lxc.network.ipv4.gateway", true, set_config_network_legacy_ipv4_gateway, get_config_network_legacy_item, clr_config_network_legacy_item, },
201 { "lxc.network.ipv4", true, set_config_network_legacy_ipv4, get_config_network_legacy_item, clr_config_network_legacy_item, },
202 { "lxc.network.ipv6.gateway", true, set_config_network_legacy_ipv6_gateway, get_config_network_legacy_item, clr_config_network_legacy_item, },
203 { "lxc.network.ipv6", true, set_config_network_legacy_ipv6, get_config_network_legacy_item, clr_config_network_legacy_item, },
204 { "lxc.network.", true, set_config_network_legacy_nic, get_config_network_legacy_item, clr_config_network_legacy_item, },
205 { "lxc.network", true, set_config_network_legacy, get_config_network_legacy, clr_config_network_legacy, },
206 /* [END]: REMOVE IN LXC 3.0 */
207
208 { "lxc.net.flags", false, set_config_net_flags, get_config_net_flags, clr_config_net_flags, },
209 { "lxc.net.hwaddr", false, set_config_net_hwaddr, get_config_net_hwaddr, clr_config_net_hwaddr, },
210 { "lxc.net.ipv4.address", false, set_config_net_ipv4_address, get_config_net_ipv4_address, clr_config_net_ipv4_address, },
211 { "lxc.net.ipv4.gateway", false, set_config_net_ipv4_gateway, get_config_net_ipv4_gateway, clr_config_net_ipv4_gateway, },
212 { "lxc.net.ipv6.address", false, set_config_net_ipv6_address, get_config_net_ipv6_address, clr_config_net_ipv6_address, },
213 { "lxc.net.ipv6.gateway", false, set_config_net_ipv6_gateway, get_config_net_ipv6_gateway, clr_config_net_ipv6_gateway, },
214 { "lxc.net.link", false, set_config_net_link, get_config_net_link, clr_config_net_link, },
215 { "lxc.net.macvlan.mode", false, set_config_net_macvlan_mode, get_config_net_macvlan_mode, clr_config_net_macvlan_mode, },
216 { "lxc.net.mtu", false, set_config_net_mtu, get_config_net_mtu, clr_config_net_mtu, },
217 { "lxc.net.name", false, set_config_net_name, get_config_net_name, clr_config_net_name, },
218 { "lxc.net.script.down", false, set_config_net_script_down, get_config_net_script_down, clr_config_net_script_down, },
219 { "lxc.net.script.up", false, set_config_net_script_up, get_config_net_script_up, clr_config_net_script_up, },
220 { "lxc.net.type", false, set_config_net_type, get_config_net_type, clr_config_net_type, },
221 { "lxc.net.vlan.id", false, set_config_net_vlan_id, get_config_net_vlan_id, clr_config_net_vlan_id, },
222 { "lxc.net.veth.pair", false, set_config_net_veth_pair, get_config_net_veth_pair, clr_config_net_veth_pair, },
223 { "lxc.net.", false, set_config_net_nic, get_config_net_nic, clr_config_net_nic, },
224 { "lxc.net", false, set_config_net, get_config_net, clr_config_net, },
225 { "lxc.no_new_privs", false, set_config_no_new_privs, get_config_no_new_privs, clr_config_no_new_privs, },
226 { "lxc.prlimit", false, set_config_prlimit, get_config_prlimit, clr_config_prlimit, },
227 { "lxc.pty.max", false, set_config_pty_max, get_config_pty_max, clr_config_pty_max, },
228 { "lxc.rootfs.mount", false, set_config_rootfs_mount, get_config_rootfs_mount, clr_config_rootfs_mount, },
229 { "lxc.rootfs.options", false, set_config_rootfs_options, get_config_rootfs_options, clr_config_rootfs_options, },
230 { "lxc.rootfs.path", false, set_config_rootfs_path, get_config_rootfs_path, clr_config_rootfs_path, },
231 { "lxc.seccomp.profile", false, set_config_seccomp_profile, get_config_seccomp_profile, clr_config_seccomp_profile, },
232 { "lxc.selinux.context", false, set_config_selinux_context, get_config_selinux_context, clr_config_selinux_context, },
233 { "lxc.signal.halt", false, set_config_signal_halt, get_config_signal_halt, clr_config_signal_halt, },
234 { "lxc.signal.reboot", false, set_config_signal_reboot, get_config_signal_reboot, clr_config_signal_reboot, },
235 { "lxc.signal.stop", false, set_config_signal_stop, get_config_signal_stop, clr_config_signal_stop, },
236 { "lxc.start.auto", false, set_config_start, get_config_start, clr_config_start, },
237 { "lxc.start.delay", false, set_config_start, get_config_start, clr_config_start, },
238 { "lxc.start.order", false, set_config_start, get_config_start, clr_config_start, },
239 { "lxc.tty.dir", false, set_config_tty_dir, get_config_tty_dir, clr_config_tty_dir, },
240 { "lxc.tty.max", false, set_config_tty_max, get_config_tty_max, clr_config_tty_max, },
241 { "lxc.uts.name", false, set_config_uts_name, get_config_uts_name, clr_config_uts_name, },
242
243 /* [START]: REMOVE IN LXC 3.0 */
244 { "lxc.pts", true, set_config_pty_max, get_config_pty_max, clr_config_pty_max, },
245 { "lxc.devttydir", true, set_config_tty_dir, get_config_tty_dir, clr_config_tty_dir, },
246 { "lxc.tty", true, set_config_tty_max, get_config_tty_max, clr_config_tty_max, },
247 { "lxc.aa_profile", true, set_config_lsm_aa_profile, get_config_lsm_aa_profile, clr_config_lsm_aa_profile, },
248 { "lxc.aa_allow_incomplete", true, set_config_lsm_aa_incomplete, get_config_lsm_aa_incomplete, clr_config_lsm_aa_incomplete, },
249 { "lxc.se_context", true, set_config_lsm_se_context, get_config_lsm_se_context, clr_config_lsm_se_context, },
250 { "lxc.id_map", true, set_config_idmaps, get_config_idmaps, clr_config_idmaps, },
251 { "lxc.mount", true, set_config_mount_fstab, get_config_mount_fstab, clr_config_mount_fstab, },
252 { "lxc.rootfs.backend", true, set_config_rootfs_backend, get_config_rootfs_backend, clr_config_rootfs_backend, },
253 { "lxc.rootfs", true, set_config_rootfs_path, get_config_rootfs_path, clr_config_rootfs_path, },
254 { "lxc.utsname", true, set_config_uts_name, get_config_uts_name, clr_config_uts_name, },
255 { "lxc.seccomp", true, set_config_seccomp_profile, get_config_seccomp_profile, clr_config_seccomp_profile, },
256 { "lxc.console", true, set_config_console_path, get_config_console_path, clr_config_console_path, },
257 { "lxc.haltsignal", true, set_config_signal_halt, get_config_signal_halt, clr_config_signal_halt, },
258 { "lxc.rebootsignal", true, set_config_signal_reboot, get_config_signal_reboot, clr_config_signal_reboot, },
259 { "lxc.stopsignal", true, set_config_signal_stop, get_config_signal_stop, clr_config_signal_stop, },
260 { "lxc.syslog", true, set_config_log_syslog, get_config_log_syslog, clr_config_log_syslog, },
261 { "lxc.kmsg", true, set_config_noop, get_config_noop, clr_config_noop, },
262 { "lxc.loglevel", true, set_config_log_level, get_config_log_level, clr_config_log_level, },
263 { "lxc.logfile", true, set_config_log_file, get_config_log_file, clr_config_log_file, },
264 { "lxc.init_cmd", true, set_config_init_cmd, get_config_init_cmd, clr_config_init_cmd, },
265 { "lxc.init_uid", true, set_config_init_uid, get_config_init_uid, clr_config_init_uid, },
266 { "lxc.init_gid", true, set_config_init_gid, get_config_init_gid, clr_config_init_gid, },
267 { "lxc.limit", true, set_config_limit, get_config_limit, clr_config_limit, },
268 { "lxc.pivotdir", true, set_config_noop, get_config_noop, clr_config_noop, },
269 /* [END]: REMOVE IN LXC 3.0 */
270 };
271
272 struct signame {
273 int num;
274 const char *name;
275 };
276
277 static const struct signame signames[] = {
278 { SIGHUP, "HUP" },
279 { SIGINT, "INT" },
280 { SIGQUIT, "QUIT" },
281 { SIGILL, "ILL" },
282 { SIGABRT, "ABRT" },
283 { SIGFPE, "FPE" },
284 { SIGKILL, "KILL" },
285 { SIGSEGV, "SEGV" },
286 { SIGPIPE, "PIPE" },
287 { SIGALRM, "ALRM" },
288 { SIGTERM, "TERM" },
289 { SIGUSR1, "USR1" },
290 { SIGUSR2, "USR2" },
291 { SIGCHLD, "CHLD" },
292 { SIGCONT, "CONT" },
293 { SIGSTOP, "STOP" },
294 { SIGTSTP, "TSTP" },
295 { SIGTTIN, "TTIN" },
296 { SIGTTOU, "TTOU" },
297 #ifdef SIGTRAP
298 { SIGTRAP, "TRAP" },
299 #endif
300 #ifdef SIGIOT
301 { SIGIOT, "IOT" },
302 #endif
303 #ifdef SIGEMT
304 { SIGEMT, "EMT" },
305 #endif
306 #ifdef SIGBUS
307 { SIGBUS, "BUS" },
308 #endif
309 #ifdef SIGSTKFLT
310 { SIGSTKFLT, "STKFLT" },
311 #endif
312 #ifdef SIGCLD
313 { SIGCLD, "CLD" },
314 #endif
315 #ifdef SIGURG
316 { SIGURG, "URG" },
317 #endif
318 #ifdef SIGXCPU
319 { SIGXCPU, "XCPU" },
320 #endif
321 #ifdef SIGXFSZ
322 { SIGXFSZ, "XFSZ" },
323 #endif
324 #ifdef SIGVTALRM
325 { SIGVTALRM, "VTALRM" },
326 #endif
327 #ifdef SIGPROF
328 { SIGPROF, "PROF" },
329 #endif
330 #ifdef SIGWINCH
331 { SIGWINCH, "WINCH" },
332 #endif
333 #ifdef SIGIO
334 { SIGIO, "IO" },
335 #endif
336 #ifdef SIGPOLL
337 { SIGPOLL, "POLL" },
338 #endif
339 #ifdef SIGINFO
340 { SIGINFO, "INFO" },
341 #endif
342 #ifdef SIGLOST
343 { SIGLOST, "LOST" },
344 #endif
345 #ifdef SIGPWR
346 { SIGPWR, "PWR" },
347 #endif
348 #ifdef SIGUNUSED
349 { SIGUNUSED, "UNUSED" },
350 #endif
351 #ifdef SIGSYS
352 { SIGSYS, "SYS" },
353 #endif
354 };
355
356 static const size_t config_size = sizeof(config) / sizeof(struct lxc_config_t);
357
358 struct lxc_config_t *lxc_get_config(const char *key)
359 {
360 size_t i;
361
362 for (i = 0; i < config_size; i++)
363 if (!strncmp(config[i].name, key, strlen(config[i].name)))
364 return &config[i];
365
366 return NULL;
367 }
368
369 static int set_config_net(const char *key, const char *value,
370 struct lxc_conf *lxc_conf, void *data)
371 {
372 if (!lxc_config_value_empty(value)) {
373 ERROR("lxc.net must not have a value");
374 return -1;
375 }
376
377 return clr_config_net(key, lxc_conf, data);
378 }
379
380 static int set_config_net_type(const char *key, const char *value,
381 struct lxc_conf *lxc_conf, void *data)
382 {
383 struct lxc_netdev *netdev;
384
385 if (lxc_config_value_empty(value))
386 return clr_config_net_type(key, lxc_conf, data);
387
388 if (!data)
389 return -1;
390 else
391 netdev = data;
392 if (!netdev)
393 return -1;
394
395 if (!strcmp(value, "veth")) {
396 netdev->type = LXC_NET_VETH;
397 } else if (!strcmp(value, "macvlan")) {
398 netdev->type = LXC_NET_MACVLAN;
399 lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode,
400 "private");
401 } else if (!strcmp(value, "vlan")) {
402 netdev->type = LXC_NET_VLAN;
403 } else if (!strcmp(value, "phys")) {
404 netdev->type = LXC_NET_PHYS;
405 } else if (!strcmp(value, "empty")) {
406 netdev->type = LXC_NET_EMPTY;
407 } else if (!strcmp(value, "none")) {
408 netdev->type = LXC_NET_NONE;
409 } else {
410 ERROR("invalid network type %s", value);
411 return -1;
412 }
413
414 return 0;
415 }
416
417 static int set_config_net_flags(const char *key, const char *value,
418 struct lxc_conf *lxc_conf, void *data)
419 {
420 struct lxc_netdev *netdev;
421
422 if (lxc_config_value_empty(value))
423 return clr_config_net_flags(key, lxc_conf, data);
424
425 if (!data)
426 return -1;
427 else
428 netdev = data;
429 if (!netdev)
430 return -1;
431
432 netdev->flags |= IFF_UP;
433
434 return 0;
435 }
436
437 static int create_matched_ifnames(const char *value, struct lxc_conf *lxc_conf,
438 struct lxc_netdev *netdev)
439 {
440 struct ifaddrs *ifaddr, *ifa;
441 int n;
442 int ret = 0;
443 const char *type_key = "lxc.net.type";
444 const char *link_key = "lxc.net.link";
445 const char *tmpvalue = "phys";
446
447 if (getifaddrs(&ifaddr) == -1) {
448 SYSERROR("Get network interfaces failed");
449 return -1;
450 }
451
452 for (ifa = ifaddr, n = 0; ifa != NULL; ifa = ifa->ifa_next, n++) {
453 if (!ifa->ifa_addr)
454 continue;
455 if (ifa->ifa_addr->sa_family != AF_PACKET)
456 continue;
457
458 if (!strncmp(value, ifa->ifa_name, strlen(value) - 1)) {
459 ret = set_config_net_type(type_key, tmpvalue, lxc_conf,
460 netdev);
461 if (!ret) {
462 ret = set_config_net_link(
463 link_key, ifa->ifa_name, lxc_conf, netdev);
464 if (ret) {
465 ERROR("failed to create matched ifnames");
466 break;
467 }
468 } else {
469 ERROR("failed to create matched ifnames");
470 break;
471 }
472 }
473 }
474
475 freeifaddrs(ifaddr);
476 ifaddr = NULL;
477
478 return ret;
479 }
480
481 static int set_config_net_link(const char *key, const char *value,
482 struct lxc_conf *lxc_conf, void *data)
483 {
484 struct lxc_netdev *netdev;
485 int ret = 0;
486
487 if (lxc_config_value_empty(value))
488 return clr_config_net_link(key, lxc_conf, data);
489
490 if (!data)
491 return -1;
492 else
493 netdev = data;
494 if (!netdev)
495 return -1;
496
497 if (value[strlen(value) - 1] == '+' && netdev->type == LXC_NET_PHYS)
498 ret = create_matched_ifnames(value, lxc_conf, netdev);
499 else
500 ret = network_ifname(netdev->link, value);
501
502 return ret;
503 }
504
505 static int set_config_net_name(const char *key, const char *value,
506 struct lxc_conf *lxc_conf, void *data)
507 {
508 struct lxc_netdev *netdev;
509
510 if (lxc_config_value_empty(value))
511 return clr_config_net_name(key, lxc_conf, data);
512
513 if (!data)
514 return -1;
515 else
516 netdev = data;
517 if (!netdev)
518 return -1;
519
520 return network_ifname(netdev->name, value);
521 }
522
523 static int set_config_net_veth_pair(const char *key, const char *value,
524 struct lxc_conf *lxc_conf, void *data)
525 {
526 struct lxc_netdev *netdev;
527
528 if (lxc_config_value_empty(value))
529 return clr_config_net_veth_pair(key, lxc_conf, data);
530
531 if (!data)
532 return -1;
533 else
534 netdev = data;
535 if (!netdev)
536 return -1;
537
538 return network_ifname(netdev->priv.veth_attr.pair, value);
539 }
540
541 static int set_config_net_macvlan_mode(const char *key, const char *value,
542 struct lxc_conf *lxc_conf, void *data)
543 {
544 struct lxc_netdev *netdev;
545
546 if (lxc_config_value_empty(value))
547 return clr_config_net_macvlan_mode(key, lxc_conf, data);
548
549 if (!data)
550 return -1;
551 else
552 netdev = data;
553 if (!netdev)
554 return -1;
555
556 return lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode, value);
557 }
558
559 static int set_config_net_hwaddr(const char *key, const char *value,
560 struct lxc_conf *lxc_conf, void *data)
561 {
562 struct lxc_netdev *netdev;
563 char *new_value;
564
565 if (lxc_config_value_empty(value))
566 return clr_config_net_hwaddr(key, lxc_conf, data);
567
568 if (!data)
569 return -1;
570 else
571 netdev = data;
572 if (!netdev)
573 return -1;
574
575 new_value = strdup(value);
576 if (!new_value)
577 return -1;
578
579 rand_complete_hwaddr(new_value);
580
581 if (lxc_config_value_empty(new_value)) {
582 free(new_value);
583 netdev->hwaddr = NULL;
584 return 0;
585 }
586
587 netdev->hwaddr = new_value;
588 return 0;
589 }
590
591 static int set_config_net_vlan_id(const char *key, const char *value,
592 struct lxc_conf *lxc_conf, void *data)
593 {
594 int ret;
595 struct lxc_netdev *netdev;
596
597 if (lxc_config_value_empty(value))
598 return clr_config_net_vlan_id(key, lxc_conf, data);
599
600 if (!data)
601 return -1;
602 else
603 netdev = data;
604 if (!netdev)
605 return -1;
606
607 ret = get_u16(&netdev->priv.vlan_attr.vid, value, 0);
608 if (ret < 0)
609 return -1;
610
611 return 0;
612 }
613
614 static int set_config_net_mtu(const char *key, const char *value,
615 struct lxc_conf *lxc_conf, void *data)
616 {
617 struct lxc_netdev *netdev;
618
619 if (lxc_config_value_empty(value))
620 return clr_config_net_mtu(key, lxc_conf, data);
621
622 if (!data)
623 return -1;
624 else
625 netdev = data;
626 if (!netdev)
627 return -1;
628
629 return set_config_string_item(&netdev->mtu, value);
630 }
631
632 static int set_config_net_ipv4_address(const char *key, const char *value,
633 struct lxc_conf *lxc_conf, void *data)
634 {
635 int ret;
636 struct lxc_netdev *netdev;
637 struct lxc_inetdev *inetdev;
638 struct lxc_list *list;
639 char *cursor, *slash;
640 char *addr = NULL, *bcast = NULL, *prefix = NULL;
641
642 if (lxc_config_value_empty(value))
643 return clr_config_net_ipv4_address(key, lxc_conf, data);
644
645 if (!data)
646 return -1;
647 else
648 netdev = data;
649 if (!netdev)
650 return -1;
651
652 inetdev = malloc(sizeof(*inetdev));
653 if (!inetdev)
654 return -1;
655
656 memset(inetdev, 0, sizeof(*inetdev));
657
658 list = malloc(sizeof(*list));
659 if (!list) {
660 free(inetdev);
661 return -1;
662 }
663
664 lxc_list_init(list);
665 list->elem = inetdev;
666
667 addr = strdup(value);
668 if (!addr) {
669 free(inetdev);
670 free(list);
671 return -1;
672 }
673
674 cursor = strstr(addr, " ");
675 if (cursor) {
676 *cursor = '\0';
677 bcast = cursor + 1;
678 }
679
680 slash = strstr(addr, "/");
681 if (slash) {
682 *slash = '\0';
683 prefix = slash + 1;
684 }
685
686 ret = inet_pton(AF_INET, addr, &inetdev->addr);
687 if (!ret || ret < 0) {
688 SYSERROR("Invalid ipv4 address \"%s\"", value);
689 free(inetdev);
690 free(addr);
691 free(list);
692 return -1;
693 }
694
695 if (bcast) {
696 ret = inet_pton(AF_INET, bcast, &inetdev->bcast);
697 if (!ret || ret < 0) {
698 SYSERROR("Invalid ipv4 broadcast address \"%s\"", value);
699 free(inetdev);
700 free(list);
701 free(addr);
702 return -1;
703 }
704
705 }
706
707 /* No prefix specified, determine it from the network class. */
708 if (prefix) {
709 ret = lxc_safe_uint(prefix, &inetdev->prefix);
710 if (ret < 0)
711 return -1;
712 } else {
713 inetdev->prefix = config_ip_prefix(&inetdev->addr);
714 }
715
716 /* If no broadcast address, let compute one from the
717 * prefix and address.
718 */
719 if (!bcast) {
720 inetdev->bcast.s_addr = inetdev->addr.s_addr;
721 inetdev->bcast.s_addr |= htonl(INADDR_BROADCAST >> inetdev->prefix);
722 }
723
724 lxc_list_add_tail(&netdev->ipv4, list);
725
726 free(addr);
727 return 0;
728 }
729
730 static int set_config_net_ipv4_gateway(const char *key, const char *value,
731 struct lxc_conf *lxc_conf, void *data)
732 {
733 struct lxc_netdev *netdev;
734
735 if (lxc_config_value_empty(value))
736 return clr_config_net_ipv4_gateway(key, lxc_conf, data);
737
738 if (!data)
739 return -1;
740 else
741 netdev = data;
742 if (!netdev)
743 return -1;
744
745 free(netdev->ipv4_gateway);
746
747 if (!strcmp(value, "auto")) {
748 netdev->ipv4_gateway = NULL;
749 netdev->ipv4_gateway_auto = true;
750 } else {
751 int ret;
752 struct in_addr *gw;
753
754 gw = malloc(sizeof(*gw));
755 if (!gw)
756 return -1;
757
758 ret = inet_pton(AF_INET, value, gw);
759 if (!ret || ret < 0) {
760 SYSERROR("Invalid ipv4 gateway address \"%s\"", value);
761 free(gw);
762 return -1;
763 }
764
765 netdev->ipv4_gateway = gw;
766 netdev->ipv4_gateway_auto = false;
767 }
768
769 return 0;
770 }
771
772 static int set_config_net_ipv6_address(const char *key, const char *value,
773 struct lxc_conf *lxc_conf, void *data)
774 {
775 int ret;
776 struct lxc_netdev *netdev;
777 struct lxc_inet6dev *inet6dev;
778 struct lxc_list *list;
779 char *slash, *valdup, *netmask;
780
781 if (lxc_config_value_empty(value))
782 return clr_config_net_ipv6_address(key, lxc_conf, data);
783
784 if (!data)
785 return -1;
786 else
787 netdev = data;
788 if (!netdev)
789 return -1;
790
791 inet6dev = malloc(sizeof(*inet6dev));
792 if (!inet6dev)
793 return -1;
794
795 memset(inet6dev, 0, sizeof(*inet6dev));
796
797 list = malloc(sizeof(*list));
798 if (!list) {
799 free(inet6dev);
800 return -1;
801 }
802
803 lxc_list_init(list);
804 list->elem = inet6dev;
805
806 valdup = strdup(value);
807 if (!valdup) {
808 free(list);
809 free(inet6dev);
810 return -1;
811 }
812
813 inet6dev->prefix = 64;
814 slash = strstr(valdup, "/");
815 if (slash) {
816 *slash = '\0';
817 netmask = slash + 1;
818 if (lxc_safe_uint(netmask, &inet6dev->prefix) < 0)
819 return -1;
820 }
821
822 ret = inet_pton(AF_INET6, valdup, &inet6dev->addr);
823 if (!ret || ret < 0) {
824 SYSERROR("Invalid ipv6 address \"%s\"", valdup);
825 free(list);
826 free(inet6dev);
827 free(valdup);
828 return -1;
829 }
830
831 lxc_list_add_tail(&netdev->ipv6, list);
832
833 free(valdup);
834 return 0;
835 }
836
837 static int set_config_net_ipv6_gateway(const char *key, const char *value,
838 struct lxc_conf *lxc_conf, void *data)
839 {
840 struct lxc_netdev *netdev;
841
842 if (lxc_config_value_empty(value))
843 return clr_config_net_ipv6_gateway(key, lxc_conf, data);
844
845 if (!data)
846 return -1;
847 else
848 netdev = data;
849 if (!netdev)
850 return -1;
851
852 free(netdev->ipv6_gateway);
853
854 if (!strcmp(value, "auto")) {
855 netdev->ipv6_gateway = NULL;
856 netdev->ipv6_gateway_auto = true;
857 } else {
858 int ret;
859 struct in6_addr *gw;
860
861 gw = malloc(sizeof(*gw));
862 if (!gw)
863 return -1;
864
865 ret = inet_pton(AF_INET6, value, gw);
866 if (!ret || ret < 0) {
867 SYSERROR("Invalid ipv6 gateway address \"%s\"", value);
868 free(gw);
869 return -1;
870 }
871
872 netdev->ipv6_gateway = gw;
873 netdev->ipv6_gateway_auto = false;
874 }
875
876 return 0;
877 }
878
879 static int set_config_net_script_up(const char *key, const char *value,
880 struct lxc_conf *lxc_conf, void *data)
881 {
882 struct lxc_netdev *netdev;
883
884 if (lxc_config_value_empty(value))
885 return clr_config_net_script_up(key, lxc_conf, data);
886
887 if (!data)
888 return -1;
889 else
890 netdev = data;
891 if (!netdev)
892 return -1;
893
894 return set_config_string_item(&netdev->upscript, value);
895 }
896
897 static int set_config_net_script_down(const char *key, const char *value,
898 struct lxc_conf *lxc_conf, void *data)
899 {
900 struct lxc_netdev *netdev;
901
902 if (lxc_config_value_empty(value))
903 return clr_config_net_script_down(key, lxc_conf, data);
904
905 if (!data)
906 return -1;
907 else
908 netdev = data;
909 if (!netdev)
910 return -1;
911
912 return set_config_string_item(&netdev->downscript, value);
913 }
914
915 static int add_hook(struct lxc_conf *lxc_conf, int which, char *hook)
916 {
917 struct lxc_list *hooklist;
918
919 hooklist = malloc(sizeof(*hooklist));
920 if (!hooklist) {
921 free(hook);
922 return -1;
923 }
924
925 hooklist->elem = hook;
926 lxc_list_add_tail(&lxc_conf->hooks[which], hooklist);
927 return 0;
928 }
929
930 static int set_config_seccomp_profile(const char *key, const char *value,
931 struct lxc_conf *lxc_conf, void *data)
932 {
933 return set_config_path_item(&lxc_conf->seccomp, value);
934 }
935
936 static int set_config_execute_cmd(const char *key, const char *value,
937 struct lxc_conf *lxc_conf, void *data)
938 {
939 return set_config_path_item(&lxc_conf->execute_cmd, value);
940 }
941
942 static int set_config_init_cmd(const char *key, const char *value,
943 struct lxc_conf *lxc_conf, void *data)
944 {
945 return set_config_path_item(&lxc_conf->init_cmd, value);
946 }
947
948 static int set_config_init_uid(const char *key, const char *value,
949 struct lxc_conf *lxc_conf, void *data)
950 {
951 unsigned int init_uid;
952
953 if (lxc_config_value_empty(value)) {
954 lxc_conf->init_uid = 0;
955 return 0;
956 }
957
958 if (lxc_safe_uint(value, &init_uid) < 0)
959 return -1;
960
961 lxc_conf->init_uid = init_uid;
962
963 return 0;
964 }
965
966 static int set_config_init_gid(const char *key, const char *value,
967 struct lxc_conf *lxc_conf, void *data)
968 {
969 unsigned int init_gid;
970
971 if (lxc_config_value_empty(value)) {
972 lxc_conf->init_gid = 0;
973 return 0;
974 }
975
976 if (lxc_safe_uint(value, &init_gid) < 0)
977 return -1;
978
979 lxc_conf->init_gid = init_gid;
980
981 return 0;
982 }
983
984 static int set_config_hooks(const char *key, const char *value,
985 struct lxc_conf *lxc_conf, void *data)
986 {
987 char *copy;
988
989 if (lxc_config_value_empty(value))
990 return lxc_clear_hooks(lxc_conf, key);
991
992 if (strcmp(key + 4, "hook") == 0) {
993 ERROR("lxc.hook must not have a value");
994 return -1;
995 }
996
997 copy = strdup(value);
998 if (!copy)
999 return -1;
1000
1001 if (strcmp(key + 9, "pre-start") == 0)
1002 return add_hook(lxc_conf, LXCHOOK_PRESTART, copy);
1003 else if (strcmp(key + 9, "start-host") == 0)
1004 return add_hook(lxc_conf, LXCHOOK_START_HOST, copy);
1005 else if (strcmp(key + 9, "pre-mount") == 0)
1006 return add_hook(lxc_conf, LXCHOOK_PREMOUNT, copy);
1007 else if (strcmp(key + 9, "autodev") == 0)
1008 return add_hook(lxc_conf, LXCHOOK_AUTODEV, copy);
1009 else if (strcmp(key + 9, "mount") == 0)
1010 return add_hook(lxc_conf, LXCHOOK_MOUNT, copy);
1011 else if (strcmp(key + 9, "start") == 0)
1012 return add_hook(lxc_conf, LXCHOOK_START, copy);
1013 else if (strcmp(key + 9, "stop") == 0)
1014 return add_hook(lxc_conf, LXCHOOK_STOP, copy);
1015 else if (strcmp(key + 9, "post-stop") == 0)
1016 return add_hook(lxc_conf, LXCHOOK_POSTSTOP, copy);
1017 else if (strcmp(key + 9, "clone") == 0)
1018 return add_hook(lxc_conf, LXCHOOK_CLONE, copy);
1019 else if (strcmp(key + 9, "destroy") == 0)
1020 return add_hook(lxc_conf, LXCHOOK_DESTROY, copy);
1021
1022 free(copy);
1023 return -1;
1024 }
1025
1026 static int set_config_personality(const char *key, const char *value,
1027 struct lxc_conf *lxc_conf, void *data)
1028 {
1029 signed long personality = lxc_config_parse_arch(value);
1030
1031 if (personality >= 0)
1032 lxc_conf->personality = personality;
1033 else
1034 WARN("Unsupported personality \"%s\"", value);
1035
1036 return 0;
1037 }
1038
1039 static int set_config_pty_max(const char *key, const char *value,
1040 struct lxc_conf *lxc_conf, void *data)
1041 {
1042 if (lxc_config_value_empty(value)) {
1043 lxc_conf->pts = 0;
1044 return 0;
1045 }
1046
1047 if (lxc_safe_uint(value, &lxc_conf->pts) < 0)
1048 return -1;
1049
1050 return 0;
1051 }
1052
1053 /* We only need to check whether the first byte of the key after the lxc.start.
1054 * prefix matches our expectations since they fortunately all start with a
1055 * different letter. If anything was wrong with the key we would have already
1056 * noticed when the callback was called.
1057 */
1058 static int set_config_start(const char *key, const char *value,
1059 struct lxc_conf *lxc_conf, void *data)
1060 {
1061 bool is_empty;
1062
1063 is_empty = lxc_config_value_empty(value);
1064
1065 if (*(key + 10) == 'a') { /* lxc.start.auto */
1066 if (is_empty) {
1067 lxc_conf->start_auto = 0;
1068 return 0;
1069 }
1070
1071 if (lxc_safe_uint(value, &lxc_conf->start_auto) < 0)
1072 return -1;
1073
1074 if (lxc_conf->start_auto > 1)
1075 return -1;
1076
1077 return 0;
1078 } else if (*(key + 10) == 'd') { /* lxc.start.delay */
1079 if (is_empty) {
1080 lxc_conf->start_delay = 0;
1081 return 0;
1082 }
1083
1084 return lxc_safe_uint(value, &lxc_conf->start_delay);
1085 } else if (*(key + 10) == 'o') { /* lxc.start.order */
1086 if (is_empty) {
1087 lxc_conf->start_order = 0;
1088 return 0;
1089 }
1090
1091 return lxc_safe_int(value, &lxc_conf->start_order);
1092 }
1093
1094 return -1;
1095 }
1096
1097 static int set_config_monitor(const char *key, const char *value,
1098 struct lxc_conf *lxc_conf, void *data)
1099 {
1100 if (lxc_config_value_empty(value)) {
1101 lxc_conf->monitor_unshare = 0;
1102 return 0;
1103 }
1104
1105 if (strcmp(key + 12, "unshare") == 0)
1106 return lxc_safe_uint(value, &lxc_conf->monitor_unshare);
1107
1108 return -1;
1109 }
1110
1111 static int set_config_group(const char *key, const char *value,
1112 struct lxc_conf *lxc_conf, void *data)
1113 {
1114 char *groups, *groupptr, *sptr, *token;
1115 struct lxc_list *grouplist;
1116 int ret = -1;
1117
1118 if (lxc_config_value_empty(value))
1119 return lxc_clear_groups(lxc_conf);
1120
1121 groups = strdup(value);
1122 if (!groups)
1123 return -1;
1124
1125 /* In case several groups are specified in a single line split these
1126 * groups in a single element for the list.
1127 */
1128 for (groupptr = groups;; groupptr = NULL) {
1129 token = strtok_r(groupptr, " \t", &sptr);
1130 if (!token) {
1131 ret = 0;
1132 break;
1133 }
1134
1135 grouplist = malloc(sizeof(*grouplist));
1136 if (!grouplist)
1137 break;
1138
1139 grouplist->elem = strdup(token);
1140 if (!grouplist->elem) {
1141 free(grouplist);
1142 break;
1143 }
1144
1145 lxc_list_add_tail(&lxc_conf->groups, grouplist);
1146 }
1147
1148 free(groups);
1149 return ret;
1150 }
1151
1152 static int set_config_environment(const char *key, const char *value,
1153 struct lxc_conf *lxc_conf, void *data)
1154 {
1155 struct lxc_list *list_item = NULL;
1156
1157 if (lxc_config_value_empty(value))
1158 return lxc_clear_environment(lxc_conf);
1159
1160 list_item = malloc(sizeof(*list_item));
1161 if (!list_item)
1162 goto on_error;
1163
1164 list_item->elem = strdup(value);
1165
1166 if (!list_item->elem)
1167 goto on_error;
1168
1169 lxc_list_add_tail(&lxc_conf->environment, list_item);
1170
1171 return 0;
1172
1173 on_error:
1174 free(list_item);
1175 return -1;
1176 }
1177
1178 static int set_config_tty_max(const char *key, const char *value,
1179 struct lxc_conf *lxc_conf, void *data)
1180 {
1181 if (lxc_config_value_empty(value)) {
1182 lxc_conf->tty = 0;
1183 return 0;
1184 }
1185
1186 return lxc_safe_uint(value, &lxc_conf->tty);
1187 }
1188
1189 static int set_config_tty_dir(const char *key, const char *value,
1190 struct lxc_conf *lxc_conf, void *data)
1191 {
1192 return set_config_string_item_max(&lxc_conf->ttydir, value,
1193 NAME_MAX + 1);
1194 }
1195
1196 static int set_config_apparmor_profile(const char *key, const char *value,
1197 struct lxc_conf *lxc_conf, void *data)
1198 {
1199 return set_config_string_item(&lxc_conf->lsm_aa_profile, value);
1200 }
1201
1202 static int set_config_apparmor_allow_incomplete(const char *key,
1203 const char *value,
1204 struct lxc_conf *lxc_conf,
1205 void *data)
1206 {
1207 if (lxc_config_value_empty(value)) {
1208 lxc_conf->lsm_aa_allow_incomplete = 0;
1209 return 0;
1210 }
1211
1212 if (lxc_safe_uint(value, &lxc_conf->lsm_aa_allow_incomplete) < 0)
1213 return -1;
1214
1215 if (lxc_conf->lsm_aa_allow_incomplete > 1)
1216 return -1;
1217
1218 return 0;
1219 }
1220
1221 static int set_config_selinux_context(const char *key, const char *value,
1222 struct lxc_conf *lxc_conf, void *data)
1223 {
1224 return set_config_string_item(&lxc_conf->lsm_se_context, value);
1225 }
1226
1227 static int set_config_log_file(const char *key, const char *value,
1228 struct lxc_conf *c, void *data)
1229 {
1230 int ret;
1231
1232 if (lxc_config_value_empty(value)) {
1233 free(c->logfile);
1234 c->logfile = NULL;
1235 return 0;
1236 }
1237
1238 /* Store these values in the lxc_conf, and then try to set for actual
1239 * current logging.
1240 */
1241 ret = set_config_path_item(&c->logfile, value);
1242 if (ret == 0)
1243 ret = lxc_log_set_file(&c->logfd, c->logfile);
1244
1245 return ret;
1246 }
1247
1248 static int set_config_log_level(const char *key, const char *value,
1249 struct lxc_conf *lxc_conf, void *data)
1250 {
1251 int newlevel;
1252
1253 if (lxc_config_value_empty(value)) {
1254 lxc_conf->loglevel = LXC_LOG_LEVEL_NOTSET;
1255 return 0;
1256 }
1257
1258 if (value[0] >= '0' && value[0] <= '9') {
1259 if (lxc_safe_int(value, &newlevel) < 0)
1260 return -1;
1261 } else {
1262 newlevel = lxc_log_priority_to_int(value);
1263 }
1264
1265 /* Store these values in the lxc_conf, and then try to set for actual
1266 * current logging.
1267 */
1268 lxc_conf->loglevel = newlevel;
1269 return lxc_log_set_level(&lxc_conf->loglevel, newlevel);
1270 }
1271
1272 static int set_config_autodev(const char *key, const char *value,
1273 struct lxc_conf *lxc_conf, void *data)
1274 {
1275 if (lxc_config_value_empty(value)) {
1276 lxc_conf->autodev = 0;
1277 return 0;
1278 }
1279
1280 if (lxc_safe_uint(value, &lxc_conf->autodev) < 0)
1281 return -1;
1282
1283 if (lxc_conf->autodev > 1)
1284 return -1;
1285
1286 return 0;
1287 }
1288
1289 static int sig_num(const char *sig)
1290 {
1291 unsigned int signum;
1292
1293 if (lxc_safe_uint(sig, &signum) < 0)
1294 return -1;
1295
1296 return signum;
1297 }
1298
1299 static int rt_sig_num(const char *signame)
1300 {
1301 int rtmax = 0, sig_n = 0;
1302
1303 if (strncasecmp(signame, "max-", 4) == 0) {
1304 rtmax = 1;
1305 }
1306
1307 signame += 4;
1308 if (!isdigit(*signame))
1309 return -1;
1310
1311 sig_n = sig_num(signame);
1312 sig_n = rtmax ? SIGRTMAX - sig_n : SIGRTMIN + sig_n;
1313 if (sig_n > SIGRTMAX || sig_n < SIGRTMIN)
1314 return -1;
1315
1316 return sig_n;
1317 }
1318
1319 static int sig_parse(const char *signame)
1320 {
1321 size_t n;
1322
1323 if (isdigit(*signame)) {
1324 return sig_num(signame);
1325 } else if (strncasecmp(signame, "sig", 3) == 0) {
1326 signame += 3;
1327 if (strncasecmp(signame, "rt", 2) == 0)
1328 return rt_sig_num(signame + 2);
1329 for (n = 0; n < sizeof(signames) / sizeof((signames)[0]); n++) {
1330 if (strcasecmp(signames[n].name, signame) == 0)
1331 return signames[n].num;
1332 }
1333 }
1334
1335 return -1;
1336 }
1337
1338 static int set_config_signal_halt(const char *key, const char *value,
1339 struct lxc_conf *lxc_conf, void *data)
1340 {
1341 int sig_n;
1342
1343 if (lxc_config_value_empty(value)) {
1344 lxc_conf->haltsignal = 0;
1345 return 0;
1346 }
1347
1348 sig_n = sig_parse(value);
1349 if (sig_n < 0)
1350 return -1;
1351
1352 lxc_conf->haltsignal = sig_n;
1353
1354 return 0;
1355 }
1356
1357 static int set_config_signal_reboot(const char *key, const char *value,
1358 struct lxc_conf *lxc_conf, void *data)
1359 {
1360 int sig_n;
1361
1362 if (lxc_config_value_empty(value)) {
1363 lxc_conf->rebootsignal = 0;
1364 return 0;
1365 }
1366
1367 sig_n = sig_parse(value);
1368 if (sig_n < 0)
1369 return -1;
1370
1371 lxc_conf->rebootsignal = sig_n;
1372
1373 return 0;
1374 }
1375
1376 static int set_config_signal_stop(const char *key, const char *value,
1377 struct lxc_conf *lxc_conf, void *data)
1378 {
1379 int sig_n;
1380
1381 if (lxc_config_value_empty(value)) {
1382 lxc_conf->stopsignal = 0;
1383 return 0;
1384 }
1385
1386 sig_n = sig_parse(value);
1387 if (sig_n < 0)
1388 return -1;
1389
1390 lxc_conf->stopsignal = sig_n;
1391
1392 return 0;
1393 }
1394
1395 static int set_config_cgroup_controller(const char *key, const char *value,
1396 struct lxc_conf *lxc_conf, void *data)
1397 {
1398 char *subkey;
1399 char *token = "lxc.cgroup.";
1400 struct lxc_list *cglist = NULL;
1401 struct lxc_cgroup *cgelem = NULL;
1402
1403 if (lxc_config_value_empty(value))
1404 return lxc_clear_cgroups(lxc_conf, key);
1405
1406 subkey = strstr(key, token);
1407 if (!subkey)
1408 return -1;
1409
1410 if (!strlen(subkey))
1411 return -1;
1412
1413 if (strlen(subkey) == strlen(token))
1414 return -1;
1415
1416 subkey += strlen(token);
1417
1418 cglist = malloc(sizeof(*cglist));
1419 if (!cglist)
1420 goto out;
1421
1422 cgelem = malloc(sizeof(*cgelem));
1423 if (!cgelem)
1424 goto out;
1425 memset(cgelem, 0, sizeof(*cgelem));
1426
1427 cgelem->subsystem = strdup(subkey);
1428 cgelem->value = strdup(value);
1429
1430 if (!cgelem->subsystem || !cgelem->value)
1431 goto out;
1432
1433 cglist->elem = cgelem;
1434
1435 lxc_list_add_tail(&lxc_conf->cgroup, cglist);
1436
1437 return 0;
1438
1439 out:
1440 free(cglist);
1441 if (cgelem) {
1442 free(cgelem->subsystem);
1443 free(cgelem->value);
1444 free(cgelem);
1445 }
1446
1447 return -1;
1448 }
1449
1450 static int set_config_cgroup_dir(const char *key, const char *value,
1451 struct lxc_conf *lxc_conf, void *data)
1452 {
1453 if (lxc_config_value_empty(value))
1454 return clr_config_cgroup_dir(key, lxc_conf, NULL);
1455
1456 return set_config_string_item(&lxc_conf->cgroup_meta.dir, value);
1457 }
1458
1459 static int set_config_prlimit(const char *key, const char *value,
1460 struct lxc_conf *lxc_conf, void *data)
1461 {
1462 struct lxc_list *iter;
1463 struct rlimit limit;
1464 rlim_t limit_value;
1465 struct lxc_list *limlist = NULL;
1466 struct lxc_limit *limelem = NULL;
1467
1468 if (lxc_config_value_empty(value))
1469 return lxc_clear_limits(lxc_conf, key);
1470
1471 if (strncmp(key, "lxc.prlimit.", sizeof("lxc.prlimit.") - 1) != 0)
1472 return -1;
1473
1474 key += sizeof("lxc.prlimit.") - 1;
1475
1476 /* soft limit comes first in the value */
1477 if (!parse_limit_value(&value, &limit_value))
1478 return -1;
1479 limit.rlim_cur = limit_value;
1480
1481 /* skip spaces and a colon */
1482 while (isspace(*value))
1483 ++value;
1484
1485 if (*value == ':')
1486 ++value;
1487 else if (*value) /* any other character is an error here */
1488 return -1;
1489
1490 while (isspace(*value))
1491 ++value;
1492
1493 /* optional hard limit */
1494 if (*value) {
1495 if (!parse_limit_value(&value, &limit_value))
1496 return -1;
1497 limit.rlim_max = limit_value;
1498
1499 /* check for trailing garbage */
1500 while (isspace(*value))
1501 ++value;
1502
1503 if (*value)
1504 return -1;
1505 } else {
1506 /* a single value sets both hard and soft limit */
1507 limit.rlim_max = limit.rlim_cur;
1508 }
1509
1510 /* find existing list element */
1511 lxc_list_for_each(iter, &lxc_conf->limits)
1512 {
1513 limelem = iter->elem;
1514 if (!strcmp(key, limelem->resource)) {
1515 limelem->limit = limit;
1516 return 0;
1517 }
1518 }
1519
1520 /* allocate list element */
1521 limlist = malloc(sizeof(*limlist));
1522 if (!limlist)
1523 goto out;
1524
1525 limelem = malloc(sizeof(*limelem));
1526 if (!limelem)
1527 goto out;
1528 memset(limelem, 0, sizeof(*limelem));
1529
1530 limelem->resource = strdup(key);
1531 if (!limelem->resource)
1532 goto out;
1533 limelem->limit = limit;
1534
1535 limlist->elem = limelem;
1536
1537 lxc_list_add_tail(&lxc_conf->limits, limlist);
1538
1539 return 0;
1540
1541 out:
1542 free(limlist);
1543 if (limelem) {
1544 free(limelem->resource);
1545 free(limelem);
1546 }
1547 return -1;
1548 }
1549
1550 static int set_config_idmaps(const char *key, const char *value,
1551 struct lxc_conf *lxc_conf, void *data)
1552 {
1553 unsigned long hostid, nsid, range;
1554 char type;
1555 int ret;
1556 struct lxc_list *idmaplist = NULL;
1557 struct id_map *idmap = NULL;
1558
1559 if (lxc_config_value_empty(value))
1560 return lxc_clear_idmaps(lxc_conf);
1561
1562 idmaplist = malloc(sizeof(*idmaplist));
1563 if (!idmaplist)
1564 goto on_error;
1565
1566 idmap = malloc(sizeof(*idmap));
1567 if (!idmap)
1568 goto on_error;
1569 memset(idmap, 0, sizeof(*idmap));
1570
1571 ret = parse_idmaps(value, &type, &nsid, &hostid, &range);
1572 if (ret < 0)
1573 goto on_error;
1574
1575 INFO("Read uid map: type %c nsid %lu hostid %lu range %lu", type, nsid, hostid, range);
1576 if (type == 'u')
1577 idmap->idtype = ID_TYPE_UID;
1578 else if (type == 'g')
1579 idmap->idtype = ID_TYPE_GID;
1580 else
1581 goto on_error;
1582
1583 idmap->hostid = hostid;
1584 idmap->nsid = nsid;
1585 idmap->range = range;
1586 idmaplist->elem = idmap;
1587 lxc_list_add_tail(&lxc_conf->id_map, idmaplist);
1588 idmap = NULL;
1589
1590 return 0;
1591
1592 on_error:
1593 free(idmaplist);
1594 free(idmap);
1595
1596 return -1;
1597 }
1598
1599 static int set_config_mount_fstab(const char *key, const char *value,
1600 struct lxc_conf *lxc_conf, void *data)
1601 {
1602 if (lxc_config_value_empty(value)) {
1603 clr_config_mount_fstab(key, lxc_conf, NULL);
1604 return -1;
1605 }
1606
1607 return set_config_path_item(&lxc_conf->fstab, value);
1608 }
1609
1610 static int set_config_mount_auto(const char *key, const char *value,
1611 struct lxc_conf *lxc_conf, void *data)
1612 {
1613 char *autos, *autoptr, *sptr, *token;
1614 int i;
1615 int ret = -1;
1616 static struct {
1617 const char *token;
1618 int mask;
1619 int flag;
1620 } allowed_auto_mounts[] = {
1621 { "proc", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED },
1622 { "proc:mixed", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED },
1623 { "proc:rw", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_RW },
1624 { "sys", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED },
1625 { "sys:ro", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RO },
1626 { "sys:mixed", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED },
1627 { "sys:rw", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RW },
1628 { "cgroup", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC },
1629 { "cgroup:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED },
1630 { "cgroup:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO },
1631 { "cgroup:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW },
1632 { "cgroup-full", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_NOSPEC },
1633 { "cgroup-full:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_MIXED },
1634 { "cgroup-full:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RO },
1635 { "cgroup-full:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RW },
1636 /* For adding anything that is just a single on/off, but has no
1637 * options: keep mask and flag identical and just define the enum
1638 * value as an unused bit so far
1639 */
1640 { NULL, 0, 0 }
1641 };
1642
1643 if (lxc_config_value_empty(value)) {
1644 lxc_conf->auto_mounts = 0;
1645 return 0;
1646 }
1647
1648 autos = strdup(value);
1649 if (!autos)
1650 return -1;
1651
1652 for (autoptr = autos;; autoptr = NULL) {
1653 token = strtok_r(autoptr, " \t", &sptr);
1654 if (!token) {
1655 ret = 0;
1656 break;
1657 }
1658
1659 for (i = 0; allowed_auto_mounts[i].token; i++) {
1660 if (!strcmp(allowed_auto_mounts[i].token, token))
1661 break;
1662 }
1663
1664 if (!allowed_auto_mounts[i].token) {
1665 ERROR("Invalid filesystem to automount \"%s\"", token);
1666 break;
1667 }
1668
1669 lxc_conf->auto_mounts &= ~allowed_auto_mounts[i].mask;
1670 lxc_conf->auto_mounts |= allowed_auto_mounts[i].flag;
1671 }
1672
1673 free(autos);
1674 return ret;
1675 }
1676
1677 static int set_config_mount(const char *key, const char *value,
1678 struct lxc_conf *lxc_conf, void *data)
1679 {
1680 char *mntelem;
1681 struct lxc_list *mntlist;
1682
1683 if (lxc_config_value_empty(value))
1684 return lxc_clear_mount_entries(lxc_conf);
1685
1686 mntlist = malloc(sizeof(*mntlist));
1687 if (!mntlist)
1688 return -1;
1689
1690 mntelem = strdup(value);
1691 if (!mntelem) {
1692 free(mntlist);
1693 return -1;
1694 }
1695 mntlist->elem = mntelem;
1696
1697 lxc_list_add_tail(&lxc_conf->mount_list, mntlist);
1698
1699 return 0;
1700 }
1701
1702 static int set_config_cap_keep(const char *key, const char *value,
1703 struct lxc_conf *lxc_conf, void *data)
1704 {
1705 char *keepcaps, *keepptr, *sptr, *token;
1706 struct lxc_list *keeplist;
1707 int ret = -1;
1708
1709 if (lxc_config_value_empty(value))
1710 return lxc_clear_config_keepcaps(lxc_conf);
1711
1712 keepcaps = strdup(value);
1713 if (!keepcaps)
1714 return -1;
1715
1716 /* In case several capability keep is specified in a single line
1717 * split these caps in a single element for the list.
1718 */
1719 for (keepptr = keepcaps;; keepptr = NULL) {
1720 token = strtok_r(keepptr, " \t", &sptr);
1721 if (!token) {
1722 ret = 0;
1723 break;
1724 }
1725
1726 if (!strcmp(token, "none"))
1727 lxc_clear_config_keepcaps(lxc_conf);
1728
1729 keeplist = malloc(sizeof(*keeplist));
1730 if (!keeplist)
1731 break;
1732
1733 keeplist->elem = strdup(token);
1734 if (!keeplist->elem) {
1735 free(keeplist);
1736 break;
1737 }
1738
1739 lxc_list_add_tail(&lxc_conf->keepcaps, keeplist);
1740 }
1741
1742 free(keepcaps);
1743
1744 return ret;
1745 }
1746
1747 static int set_config_cap_drop(const char *key, const char *value,
1748 struct lxc_conf *lxc_conf, void *data)
1749 {
1750 char *dropcaps, *dropptr, *sptr, *token;
1751 struct lxc_list *droplist;
1752 int ret = -1;
1753
1754 if (lxc_config_value_empty(value))
1755 return lxc_clear_config_caps(lxc_conf);
1756
1757 dropcaps = strdup(value);
1758 if (!dropcaps)
1759 return -1;
1760
1761 /* In case several capability drop is specified in a single line
1762 * split these caps in a single element for the list.
1763 */
1764 for (dropptr = dropcaps;; dropptr = NULL) {
1765 token = strtok_r(dropptr, " \t", &sptr);
1766 if (!token) {
1767 ret = 0;
1768 break;
1769 }
1770
1771 droplist = malloc(sizeof(*droplist));
1772 if (!droplist)
1773 break;
1774
1775 droplist->elem = strdup(token);
1776 if (!droplist->elem) {
1777 free(droplist);
1778 break;
1779 }
1780
1781 lxc_list_add_tail(&lxc_conf->caps, droplist);
1782 }
1783
1784 free(dropcaps);
1785
1786 return ret;
1787 }
1788
1789 static int set_config_console_path(const char *key, const char *value,
1790 struct lxc_conf *lxc_conf, void *data)
1791 {
1792 return set_config_path_item(&lxc_conf->console.path, value);
1793 }
1794
1795 static int set_config_console_rotate(const char *key, const char *value,
1796 struct lxc_conf *lxc_conf, void *data)
1797 {
1798 if (lxc_config_value_empty(value)) {
1799 lxc_conf->console.log_rotate = 0;
1800 return 0;
1801 }
1802
1803 if (lxc_safe_uint(value, &lxc_conf->console.log_rotate) < 0)
1804 return -1;
1805
1806 if (lxc_conf->console.log_rotate > 1) {
1807 ERROR("The \"lxc.console.rotate\" config key can only be set "
1808 "to 0 or 1");
1809 return -1;
1810 }
1811
1812 return 0;
1813 }
1814
1815 static int set_config_console_logfile(const char *key, const char *value,
1816 struct lxc_conf *lxc_conf, void *data)
1817 {
1818 return set_config_path_item(&lxc_conf->console.log_path, value);
1819 }
1820
1821 static int set_config_console_buffer_size(const char *key, const char *value,
1822 struct lxc_conf *lxc_conf, void *data)
1823 {
1824 int ret;
1825 int64_t size;
1826 uint64_t buffer_size, pgsz;
1827
1828 if (lxc_config_value_empty(value)) {
1829 lxc_conf->console.buffer_size = 0;
1830 return 0;
1831 }
1832
1833 /* If the user specified "auto" the default log size is 2^17 = 128 Kib */
1834 if (!strcmp(value, "auto")) {
1835 lxc_conf->console.buffer_size = 1 << 17;
1836 return 0;
1837 }
1838
1839 ret = parse_byte_size_string(value, &size);
1840 if (ret < 0)
1841 return -1;
1842
1843 if (size < 0)
1844 return -EINVAL;
1845
1846 /* must be at least a page size */
1847 pgsz = lxc_getpagesize();
1848 if ((uint64_t)size < pgsz) {
1849 NOTICE("Requested ringbuffer size for the console is %" PRId64
1850 " but must be at least %" PRId64
1851 " bytes. Setting ringbuffer size to %" PRId64 " bytes",
1852 size, pgsz, pgsz);
1853 size = pgsz;
1854 }
1855
1856 buffer_size = lxc_find_next_power2((uint64_t)size);
1857 if (buffer_size == 0)
1858 return -EINVAL;
1859
1860 if (buffer_size != size)
1861 NOTICE("Passed size was not a power of 2. Rounding log size to "
1862 "next power of two: %" PRIu64 " bytes", buffer_size);
1863
1864 lxc_conf->console.buffer_size = buffer_size;
1865 return 0;
1866 }
1867
1868 static int set_config_console_buffer_logfile(const char *key, const char *value,
1869 struct lxc_conf *lxc_conf,
1870 void *data)
1871 {
1872 return set_config_path_item(&lxc_conf->console.buffer_log_file, value);
1873 }
1874
1875 int append_unexp_config_line(const char *line, struct lxc_conf *conf)
1876 {
1877 size_t len = conf->unexpanded_len, linelen = strlen(line);
1878
1879 update_hwaddr(line);
1880
1881 while (conf->unexpanded_alloced <= len + linelen + 2) {
1882 char *tmp = realloc(conf->unexpanded_config,
1883 conf->unexpanded_alloced + 1024);
1884 if (!tmp)
1885 return -1;
1886
1887 if (!conf->unexpanded_config)
1888 *tmp = '\0';
1889 conf->unexpanded_config = tmp;
1890 conf->unexpanded_alloced += 1024;
1891 }
1892 strcat(conf->unexpanded_config, line);
1893 conf->unexpanded_len += linelen;
1894 if (line[linelen - 1] != '\n') {
1895 strcat(conf->unexpanded_config, "\n");
1896 conf->unexpanded_len++;
1897 }
1898
1899 return 0;
1900 }
1901
1902 static int do_includedir(const char *dirp, struct lxc_conf *lxc_conf)
1903 {
1904 struct dirent *direntp;
1905 DIR *dir;
1906 char path[MAXPATHLEN];
1907 int len;
1908 int ret = -1;
1909
1910 dir = opendir(dirp);
1911 if (!dir)
1912 return -1;
1913
1914 while ((direntp = readdir(dir))) {
1915 const char *fnam;
1916 if (!direntp)
1917 break;
1918
1919 fnam = direntp->d_name;
1920 if (!strcmp(fnam, "."))
1921 continue;
1922
1923 if (!strcmp(fnam, ".."))
1924 continue;
1925
1926 len = strlen(fnam);
1927 if (len < 6 || strncmp(fnam + len - 5, ".conf", 5) != 0)
1928 continue;
1929
1930 len = snprintf(path, MAXPATHLEN, "%s/%s", dirp, fnam);
1931 if (len < 0 || len >= MAXPATHLEN) {
1932 ret = -1;
1933 goto out;
1934 }
1935
1936 ret = lxc_config_read(path, lxc_conf, true);
1937 if (ret < 0)
1938 goto out;
1939 }
1940 ret = 0;
1941
1942 out:
1943 closedir(dir);
1944
1945 return ret;
1946 }
1947
1948 static int set_config_includefiles(const char *key, const char *value,
1949 struct lxc_conf *lxc_conf, void *data)
1950 {
1951 if (lxc_config_value_empty(value)) {
1952 clr_config_includefiles(key, lxc_conf, NULL);
1953 return 0;
1954 }
1955
1956 if (is_dir(value))
1957 return do_includedir(value, lxc_conf);
1958
1959 return lxc_config_read(value, lxc_conf, true);
1960 }
1961
1962 static int set_config_rootfs_path(const char *key, const char *value,
1963 struct lxc_conf *lxc_conf, void *data)
1964 {
1965 return set_config_path_item(&lxc_conf->rootfs.path, value);
1966 }
1967
1968 static int set_config_rootfs_mount(const char *key, const char *value,
1969 struct lxc_conf *lxc_conf, void *data)
1970 {
1971 return set_config_path_item(&lxc_conf->rootfs.mount, value);
1972 }
1973
1974 static int set_config_rootfs_options(const char *key, const char *value,
1975 struct lxc_conf *lxc_conf, void *data)
1976 {
1977 return set_config_string_item(&lxc_conf->rootfs.options, value);
1978 }
1979
1980 static int set_config_rootfs_backend(const char *key, const char *value,
1981 struct lxc_conf *lxc_conf, void *data)
1982 {
1983 return 0;
1984 }
1985
1986 static int set_config_uts_name(const char *key, const char *value,
1987 struct lxc_conf *lxc_conf, void *data)
1988 {
1989 struct utsname *utsname;
1990
1991 if (lxc_config_value_empty(value)) {
1992 clr_config_uts_name(key, lxc_conf, NULL);
1993 return 0;
1994 }
1995
1996 utsname = malloc(sizeof(*utsname));
1997 if (!utsname)
1998 return -1;
1999
2000 if (strlen(value) >= sizeof(utsname->nodename)) {
2001 free(utsname);
2002 return -1;
2003 }
2004
2005 strcpy(utsname->nodename, value);
2006 free(lxc_conf->utsname);
2007 lxc_conf->utsname = utsname;
2008
2009 return 0;
2010 }
2011
2012 static int set_config_namespace(const char *key, const char *value,
2013 struct lxc_conf *lxc_conf, void *data)
2014 {
2015 int ns_idx;
2016 const char *namespace;
2017
2018 if (lxc_config_value_empty(value))
2019 return clr_config_namespace(key, lxc_conf, data);
2020
2021 namespace = key + sizeof("lxc.namespace.") - 1;
2022 ns_idx = lxc_namespace_2_ns_idx(namespace);
2023 if (ns_idx < 0)
2024 return ns_idx;
2025
2026 return set_config_string_item(&lxc_conf->inherit_ns[ns_idx], value);
2027 }
2028
2029 struct parse_line_conf {
2030 struct lxc_conf *conf;
2031 bool from_include;
2032 };
2033
2034 static int parse_line(char *buffer, void *data)
2035 {
2036 char *dot, *key, *line, *linep, *value;
2037 bool empty_line;
2038 struct lxc_config_t *config;
2039 int ret = 0;
2040 char *dup = buffer;
2041 struct parse_line_conf *plc = data;
2042
2043 /* If there are newlines in the config file we should keep them. */
2044 empty_line = lxc_is_line_empty(dup);
2045 if (empty_line)
2046 dup = "\n";
2047
2048 /* We have to dup the buffer otherwise, at the re-exec for reboot we
2049 * modified the original string on the stack by replacing '=' by '\0'
2050 * below.
2051 */
2052 linep = line = strdup(dup);
2053 if (!line)
2054 return -1;
2055
2056 if (!plc->from_include) {
2057 ret = append_unexp_config_line(line, plc->conf);
2058 if (ret < 0)
2059 goto on_error;
2060 }
2061
2062 if (empty_line)
2063 goto on_error;
2064
2065 line += lxc_char_left_gc(line, strlen(line));
2066
2067 /* ignore comments */
2068 if (line[0] == '#')
2069 goto on_error;
2070
2071 /* martian option - don't add it to the config itself */
2072 if (strncmp(line, "lxc.", 4))
2073 goto on_error;
2074
2075 ret = -1;
2076
2077 dot = strchr(line, '=');
2078 if (!dot) {
2079 ERROR("Invalid configuration line: %s", line);
2080 goto on_error;
2081 }
2082
2083 *dot = '\0';
2084 value = dot + 1;
2085
2086 key = line;
2087 key[lxc_char_right_gc(key, strlen(key))] = '\0';
2088
2089 value += lxc_char_left_gc(value, strlen(value));
2090 value[lxc_char_right_gc(value, strlen(value))] = '\0';
2091
2092 if (*value == '\'' || *value == '\"') {
2093 size_t len;
2094
2095 len = strlen(value);
2096 if (len > 1 && value[len - 1] == *value) {
2097 value[len - 1] = '\0';
2098 value++;
2099 }
2100 }
2101
2102 config = lxc_get_config(key);
2103 if (!config) {
2104 ERROR("Unknown configuration key \"%s\"", key);
2105 goto on_error;
2106 }
2107
2108 /* [START]: REMOVE IN LXC 3.0 */
2109 if (config->is_legacy_key && !plc->conf->contains_legacy_key) {
2110 plc->conf->contains_legacy_key = true;
2111 if (getenv("LXC_UPDATE_CONFIG_FORMAT")) {
2112 /* Warn the user once loud and clear that there is at
2113 * least one legacy configuration item in the
2114 * configuration file and then an update is required.
2115 */
2116 fprintf(stderr, "The configuration file contains "
2117 "legacy configuration keys.\nPlease "
2118 "update your configuration file!\nThe "
2119 "update script lxc-update-config -c "
2120 "<path-to-config> can be used for "
2121 "this.\n");
2122 }
2123 }
2124 /* [END]: REMOVE IN LXC 3.0 */
2125
2126 ret = config->set(key, value, plc->conf, NULL);
2127
2128 on_error:
2129 free(linep);
2130 return ret;
2131 }
2132
2133 static int lxc_config_readline(char *buffer, struct lxc_conf *conf)
2134 {
2135 struct parse_line_conf c;
2136
2137 c.conf = conf;
2138 c.from_include = false;
2139
2140 return parse_line(buffer, &c);
2141 }
2142
2143 int lxc_config_read(const char *file, struct lxc_conf *conf, bool from_include)
2144 {
2145 int ret;
2146 struct parse_line_conf c;
2147
2148 c.conf = conf;
2149 c.from_include = from_include;
2150
2151 ret = access(file, R_OK);
2152 if (ret < 0)
2153 return -1;
2154
2155 /* Catch only the top level config file name in the structure. */
2156 if (!conf->rcfile)
2157 conf->rcfile = strdup(file);
2158
2159 return lxc_file_for_each_line(file, parse_line, &c);
2160 }
2161
2162 int lxc_config_define_add(struct lxc_list *defines, char *arg)
2163 {
2164 struct lxc_list *dent;
2165
2166 dent = malloc(sizeof(struct lxc_list));
2167 if (!dent)
2168 return -1;
2169
2170 dent->elem = arg;
2171 lxc_list_add_tail(defines, dent);
2172 return 0;
2173 }
2174
2175 int lxc_config_define_load(struct lxc_list *defines, struct lxc_conf *conf)
2176 {
2177 struct lxc_list *it, *next;
2178 int ret = 0;
2179
2180 lxc_list_for_each(it, defines) {
2181 ret = lxc_config_readline(it->elem, conf);
2182 if (ret)
2183 break;
2184 }
2185
2186 lxc_list_for_each_safe(it, defines, next) {
2187 lxc_list_del(it);
2188 free(it);
2189 }
2190
2191 return ret;
2192 }
2193
2194 signed long lxc_config_parse_arch(const char *arch)
2195 {
2196 #if HAVE_SYS_PERSONALITY_H
2197 size_t i;
2198 struct per_name {
2199 char *name;
2200 unsigned long per;
2201 } pername[] = {
2202 { "x86", PER_LINUX32 },
2203 { "linux32", PER_LINUX32 },
2204 { "i386", PER_LINUX32 },
2205 { "i486", PER_LINUX32 },
2206 { "i586", PER_LINUX32 },
2207 { "i686", PER_LINUX32 },
2208 { "athlon", PER_LINUX32 },
2209 { "mips", PER_LINUX32 },
2210 { "mipsel", PER_LINUX32 },
2211 { "ppc", PER_LINUX32 },
2212 { "arm", PER_LINUX32 },
2213 { "armv7l", PER_LINUX32 },
2214 { "armhf", PER_LINUX32 },
2215 { "armel", PER_LINUX32 },
2216 { "powerpc", PER_LINUX32 },
2217 { "linux64", PER_LINUX },
2218 { "x86_64", PER_LINUX },
2219 { "amd64", PER_LINUX },
2220 { "mips64", PER_LINUX },
2221 { "mips64el", PER_LINUX },
2222 { "ppc64", PER_LINUX },
2223 { "ppc64le", PER_LINUX },
2224 { "ppc64el", PER_LINUX },
2225 { "powerpc64", PER_LINUX },
2226 { "s390x", PER_LINUX },
2227 { "aarch64", PER_LINUX },
2228 { "arm64", PER_LINUX },
2229 };
2230 size_t len = sizeof(pername) / sizeof(pername[0]);
2231
2232 for (i = 0; i < len; i++) {
2233 if (!strcmp(pername[i].name, arch))
2234 return pername[i].per;
2235 }
2236 #endif
2237
2238 return -1;
2239 }
2240
2241 int lxc_fill_elevated_privileges(char *flaglist, int *flags)
2242 {
2243 char *token, *saveptr = NULL;
2244 int i, aflag;
2245 struct {
2246 const char *token;
2247 int flag;
2248 } all_privs[] = {
2249 { "CGROUP", LXC_ATTACH_MOVE_TO_CGROUP },
2250 { "CAP", LXC_ATTACH_DROP_CAPABILITIES },
2251 { "LSM", LXC_ATTACH_LSM_EXEC },
2252 { NULL, 0 }
2253 };
2254
2255 if (!flaglist) {
2256 /* For the sake of backward compatibility, drop all privileges
2257 * if none is specified.
2258 */
2259 for (i = 0; all_privs[i].token; i++)
2260 *flags |= all_privs[i].flag;
2261
2262 return 0;
2263 }
2264
2265 token = strtok_r(flaglist, "|", &saveptr);
2266 while (token) {
2267 aflag = -1;
2268 for (i = 0; all_privs[i].token; i++)
2269 if (!strcmp(all_privs[i].token, token))
2270 aflag = all_privs[i].flag;
2271 if (aflag < 0)
2272 return -1;
2273
2274 *flags |= aflag;
2275
2276 token = strtok_r(NULL, "|", &saveptr);
2277 }
2278
2279 return 0;
2280 }
2281
2282 /* Write out a configuration file. */
2283 void write_config(FILE *fout, struct lxc_conf *c)
2284 {
2285 int ret;
2286 size_t len = c->unexpanded_len;
2287
2288 if (!len)
2289 return;
2290
2291 ret = fwrite(c->unexpanded_config, 1, len, fout);
2292 if (ret != len)
2293 SYSERROR("Failed to write configuration file");
2294 }
2295
2296 bool do_append_unexp_config_line(struct lxc_conf *conf, const char *key,
2297 const char *v)
2298 {
2299 int ret;
2300 size_t len;
2301 char *tmp;
2302
2303 len = strlen(key) + strlen(v) + 4;
2304 tmp = alloca(len);
2305
2306 if (lxc_config_value_empty(v))
2307 ret = snprintf(tmp, len, "%s =", key);
2308 else
2309 ret = snprintf(tmp, len, "%s = %s", key, v);
2310 if (ret < 0 || ret >= len)
2311 return false;
2312
2313 /* Save the line verbatim into unexpanded_conf */
2314 if (append_unexp_config_line(tmp, conf))
2315 return false;
2316
2317 return true;
2318 }
2319
2320 void clear_unexp_config_line(struct lxc_conf *conf, const char *key,
2321 bool rm_subkeys)
2322 {
2323 char *lend;
2324 char *lstart = conf->unexpanded_config;
2325
2326 if (!conf->unexpanded_config)
2327 return;
2328
2329 while (*lstart) {
2330 lend = strchr(lstart, '\n');
2331 char v;
2332 if (!lend)
2333 lend = lstart + strlen(lstart);
2334 else
2335 lend++;
2336 if (strncmp(lstart, key, strlen(key)) != 0) {
2337 lstart = lend;
2338 continue;
2339 }
2340 if (!rm_subkeys) {
2341 v = lstart[strlen(key)];
2342 if (!isspace(v) && v != '=') {
2343 lstart = lend;
2344 continue;
2345 }
2346 }
2347 conf->unexpanded_len -= (lend - lstart);
2348 if (*lend == '\0') {
2349 *lstart = '\0';
2350 return;
2351 }
2352 memmove(lstart, lend, strlen(lend) + 1);
2353 }
2354 }
2355
2356 bool clone_update_unexp_ovl_paths(struct lxc_conf *conf, const char *oldpath,
2357 const char *newpath, const char *oldname,
2358 const char *newname, const char *ovldir)
2359 {
2360 int ret;
2361 char *lend, *newdir, *olddir, *p, *q;
2362 size_t newdirlen, olddirlen;
2363 char *lstart = conf->unexpanded_config;
2364 const char *key = "lxc.mount.entry";
2365
2366 olddirlen = strlen(ovldir) + strlen(oldpath) + strlen(oldname) + 2;
2367 olddir = alloca(olddirlen + 1);
2368 ret = snprintf(olddir, olddirlen + 1, "%s=%s/%s", ovldir, oldpath,
2369 oldname);
2370 if (ret < 0 || ret >= olddirlen + 1)
2371 return false;
2372
2373 newdirlen = strlen(ovldir) + strlen(newpath) + strlen(newname) + 2;
2374 newdir = alloca(newdirlen + 1);
2375 ret = snprintf(newdir, newdirlen + 1, "%s=%s/%s", ovldir, newpath,
2376 newname);
2377 if (ret < 0 || ret >= newdirlen + 1)
2378 return false;
2379
2380 if (!conf->unexpanded_config)
2381 return true;
2382
2383 while (*lstart) {
2384 lend = strchr(lstart, '\n');
2385 if (!lend)
2386 lend = lstart + strlen(lstart);
2387 else
2388 lend++;
2389
2390 if (strncmp(lstart, key, strlen(key)) != 0)
2391 goto next;
2392
2393 p = strchr(lstart + strlen(key), '=');
2394 if (!p)
2395 goto next;
2396 p++;
2397
2398 while (isblank(*p))
2399 p++;
2400
2401 if (p >= lend)
2402 goto next;
2403
2404 /* Whenever an lxc.mount.entry entry is found in a line we check
2405 * if the substring " overlay" or the substring " aufs" is
2406 * present before doing any further work. We check for "
2407 * overlay" and " aufs" since both substrings need to have at
2408 * least one space before them in a valid overlay
2409 * lxc.mount.entry (/A B overlay). When the space before is
2410 * missing it is very likely that these substrings are part of a
2411 * path or something else. (Checking q >= lend ensures that we
2412 * only count matches in the current line.) */
2413 if ((!(q = strstr(p, " overlay")) || q >= lend) &&
2414 (!(q = strstr(p, " aufs")) || q >= lend))
2415 goto next;
2416
2417 if (!(q = strstr(p, olddir)) || (q >= lend))
2418 goto next;
2419
2420 /* replace the olddir with newdir */
2421 if (olddirlen >= newdirlen) {
2422 size_t diff = olddirlen - newdirlen;
2423 memcpy(q, newdir, newdirlen);
2424 if (olddirlen != newdirlen) {
2425 memmove(q + newdirlen, q + newdirlen + diff,
2426 strlen(q) - newdirlen - diff + 1);
2427 lend -= diff;
2428 conf->unexpanded_len -= diff;
2429 }
2430 } else {
2431 char *new;
2432 size_t diff = newdirlen - olddirlen;
2433 size_t oldlen = conf->unexpanded_len;
2434 size_t newlen = oldlen + diff;
2435 size_t poffset = q - conf->unexpanded_config;
2436
2437 new = realloc(conf->unexpanded_config, newlen + 1);
2438 if (!new)
2439 return false;
2440
2441 conf->unexpanded_len = newlen;
2442 conf->unexpanded_alloced = newlen + 1;
2443 new[newlen - 1] = '\0';
2444 lend = new + (lend - conf->unexpanded_config);
2445 /* Move over the remainder to make room for the newdir.
2446 */
2447 memmove(new + poffset + newdirlen,
2448 new + poffset + olddirlen,
2449 oldlen - poffset - olddirlen + 1);
2450 conf->unexpanded_config = new;
2451 memcpy(new + poffset, newdir, newdirlen);
2452 lend += diff;
2453 }
2454 next:
2455 lstart = lend;
2456 }
2457
2458 return true;
2459 }
2460
2461 bool clone_update_unexp_hooks(struct lxc_conf *conf, const char *oldpath,
2462 const char *newpath, const char *oldname,
2463 const char *newname)
2464 {
2465 int ret;
2466 char *lend, *newdir, *olddir, *p;
2467 char *lstart = conf->unexpanded_config;
2468 size_t newdirlen, olddirlen;
2469 const char *key = "lxc.hook";
2470
2471 olddirlen = strlen(oldpath) + strlen(oldname) + 1;
2472 olddir = alloca(olddirlen + 1);
2473 ret = snprintf(olddir, olddirlen + 1, "%s/%s", oldpath, oldname);
2474 if (ret < 0 || ret >= olddirlen + 1)
2475 return false;
2476
2477 newdirlen = strlen(newpath) + strlen(newname) + 1;
2478 newdir = alloca(newdirlen + 1);
2479 ret = snprintf(newdir, newdirlen + 1, "%s/%s", newpath, newname);
2480 if (ret < 0 || ret >= newdirlen + 1)
2481 return false;
2482
2483 if (!conf->unexpanded_config)
2484 return true;
2485
2486 while (*lstart) {
2487 lend = strchr(lstart, '\n');
2488 if (!lend)
2489 lend = lstart + strlen(lstart);
2490 else
2491 lend++;
2492
2493 if (strncmp(lstart, key, strlen(key)) != 0)
2494 goto next;
2495
2496 p = strchr(lstart + strlen(key), '=');
2497 if (!p)
2498 goto next;
2499 p++;
2500
2501 while (isblank(*p))
2502 p++;
2503
2504 if (p >= lend)
2505 goto next;
2506
2507 if (strncmp(p, olddir, strlen(olddir)) != 0)
2508 goto next;
2509
2510 /* replace the olddir with newdir */
2511 if (olddirlen >= newdirlen) {
2512 size_t diff = olddirlen - newdirlen;
2513 memcpy(p, newdir, newdirlen);
2514 if (olddirlen != newdirlen) {
2515 memmove(p + newdirlen, p + newdirlen + diff,
2516 strlen(p) - newdirlen - diff + 1);
2517 lend -= diff;
2518 conf->unexpanded_len -= diff;
2519 }
2520 } else {
2521 char *new;
2522 size_t diff = newdirlen - olddirlen;
2523 size_t oldlen = conf->unexpanded_len;
2524 size_t newlen = oldlen + diff;
2525 size_t poffset = p - conf->unexpanded_config;
2526
2527 new = realloc(conf->unexpanded_config, newlen + 1);
2528 if (!new)
2529 return false;
2530
2531 conf->unexpanded_len = newlen;
2532 conf->unexpanded_alloced = newlen + 1;
2533 new[newlen - 1] = '\0';
2534 lend = new + (lend - conf->unexpanded_config);
2535 /* Move over the remainder to make room for the newdir.
2536 */
2537 memmove(new + poffset + newdirlen,
2538 new + poffset + olddirlen,
2539 oldlen - poffset - olddirlen + 1);
2540 conf->unexpanded_config = new;
2541 memcpy(new + poffset, newdir, newdirlen);
2542 lend += diff;
2543 }
2544 next:
2545 lstart = lend;
2546 }
2547
2548 return true;
2549 }
2550
2551 #define DO(cmd) \
2552 { \
2553 if (!(cmd)) { \
2554 ERROR("Error writing to new config"); \
2555 return false; \
2556 } \
2557 }
2558
2559 /* This is called only from clone. We wish to update all hwaddrs in the
2560 * unexpanded config file. We can't/don't want to update any which come from
2561 * lxc.includes (there shouldn't be any).
2562 * We can't just walk the c->lxc-conf->network list because that includes netifs
2563 * from the include files. So we update the ones which we find in the unexp
2564 * config file, then find the original macaddr in the conf->network, and update
2565 * that to the same value.
2566 */
2567 bool network_new_hwaddrs(struct lxc_conf *conf)
2568 {
2569 char *lend, *p, *p2;
2570 struct lxc_list *it;
2571 char *lstart = conf->unexpanded_config;
2572
2573 if (!conf->unexpanded_config)
2574 return true;
2575
2576 while (*lstart) {
2577 char newhwaddr[18], oldhwaddr[17];
2578
2579 lend = strchr(lstart, '\n');
2580 if (!lend)
2581 lend = lstart + strlen(lstart);
2582 else
2583 lend++;
2584
2585 if (!lxc_config_net_hwaddr(lstart)) {
2586 lstart = lend;
2587 continue;
2588 }
2589
2590 p = strchr(lstart, '=');
2591 if (!p) {
2592 lstart = lend;
2593 continue;
2594 }
2595
2596 p++;
2597 while (isblank(*p))
2598 p++;
2599 if (!*p)
2600 return true;
2601
2602 p2 = p;
2603 while (*p2 && !isblank(*p2) && *p2 != '\n')
2604 p2++;
2605
2606 if ((p2 - p) != 17) {
2607 WARN("Bad hwaddr entry");
2608 lstart = lend;
2609 continue;
2610 }
2611
2612 memcpy(oldhwaddr, p, 17);
2613
2614 if (!new_hwaddr(newhwaddr))
2615 return false;
2616
2617 memcpy(p, newhwaddr, 17);
2618 lxc_list_for_each(it, &conf->network) {
2619 struct lxc_netdev *n = it->elem;
2620
2621 if (n->hwaddr && memcmp(oldhwaddr, n->hwaddr, 17) == 0)
2622 memcpy(n->hwaddr, newhwaddr, 17);
2623 }
2624
2625 lstart = lend;
2626 }
2627
2628 return true;
2629 }
2630
2631 static int set_config_ephemeral(const char *key, const char *value,
2632 struct lxc_conf *lxc_conf, void *data)
2633 {
2634 if (lxc_config_value_empty(value)) {
2635 lxc_conf->ephemeral = 0;
2636 return 0;
2637 }
2638
2639 if (lxc_safe_uint(value, &lxc_conf->ephemeral) < 0)
2640 return -1;
2641
2642 if (lxc_conf->ephemeral > 1)
2643 return -1;
2644
2645 return 0;
2646 }
2647
2648 static int set_config_log_syslog(const char *key, const char *value,
2649 struct lxc_conf *lxc_conf, void *data)
2650 {
2651 int facility;
2652
2653 if (lxc_conf->syslog) {
2654 free(lxc_conf->syslog);
2655 lxc_conf->syslog = NULL;
2656 }
2657
2658 if (lxc_config_value_empty(value))
2659 return 0;
2660
2661 facility = lxc_syslog_priority_to_int(value);
2662 if (facility == -EINVAL)
2663 return -1;
2664
2665 lxc_log_syslog(facility);
2666 return set_config_string_item(&lxc_conf->syslog, value);
2667 }
2668
2669 static int set_config_no_new_privs(const char *key, const char *value,
2670 struct lxc_conf *lxc_conf, void *data)
2671 {
2672 unsigned int v;
2673
2674 if (lxc_config_value_empty(value)) {
2675 lxc_conf->no_new_privs = false;
2676 return 0;
2677 }
2678
2679 if (lxc_safe_uint(value, &v) < 0)
2680 return -1;
2681
2682 if (v > 1)
2683 return -1;
2684
2685 lxc_conf->no_new_privs = v ? true : false;
2686
2687 return 0;
2688 }
2689
2690 static int set_config_noop(const char *key, const char *value,
2691 struct lxc_conf *lxc_conf, void *data)
2692 {
2693 return 0;
2694 }
2695
2696 /* Callbacks to get configuration items. */
2697 static int get_config_personality(const char *key, char *retv, int inlen,
2698 struct lxc_conf *c, void *data)
2699 {
2700 int fulllen = 0;
2701
2702 if (!retv)
2703 inlen = 0;
2704 else
2705 memset(retv, 0, inlen);
2706
2707 #if HAVE_SYS_PERSONALITY_H
2708 int len = 0;
2709
2710 switch (c->personality) {
2711 case PER_LINUX32:
2712 strprint(retv, inlen, "i686");
2713 break;
2714 case PER_LINUX:
2715 strprint(retv, inlen, "x86_64");
2716 break;
2717 default:
2718 break;
2719 }
2720 #endif
2721
2722 return fulllen;
2723 }
2724
2725 static int get_config_pty_max(const char *key, char *retv, int inlen,
2726 struct lxc_conf *c, void *data)
2727 {
2728 return lxc_get_conf_int(c, retv, inlen, c->pts);
2729 }
2730
2731 static int get_config_tty_max(const char *key, char *retv, int inlen,
2732 struct lxc_conf *c, void *data)
2733 {
2734 return lxc_get_conf_int(c, retv, inlen, c->tty);
2735 }
2736
2737 static int get_config_tty_dir(const char *key, char *retv, int inlen,
2738 struct lxc_conf *c, void *data)
2739 {
2740 return lxc_get_conf_str(retv, inlen, c->ttydir);
2741 }
2742
2743 static int get_config_apparmor_profile(const char *key, char *retv, int inlen,
2744 struct lxc_conf *c, void *data)
2745 {
2746 return lxc_get_conf_str(retv, inlen, c->lsm_aa_profile);
2747 }
2748
2749 static int get_config_apparmor_allow_incomplete(const char *key, char *retv,
2750 int inlen, struct lxc_conf *c,
2751 void *data)
2752 {
2753 return lxc_get_conf_int(c, retv, inlen,
2754 c->lsm_aa_allow_incomplete);
2755 }
2756
2757 static int get_config_selinux_context(const char *key, char *retv, int inlen,
2758 struct lxc_conf *c, void *data)
2759 {
2760 return lxc_get_conf_str(retv, inlen, c->lsm_se_context);
2761 }
2762
2763 /* If you ask for a specific cgroup value, i.e. lxc.cgroup.devices.list, then
2764 * just the value(s) will be printed. Since there still could be more than one,
2765 * it is newline-separated.
2766 * (Maybe that's ambigous, since some values, i.e. devices.list, will already
2767 * have newlines?)
2768 * If you ask for 'lxc.cgroup", then all cgroup entries will be printed, in
2769 * 'lxc.cgroup.subsystem.key = value' format.
2770 */
2771 static int get_config_cgroup_controller(const char *key, char *retv, int inlen,
2772 struct lxc_conf *c, void *data)
2773 {
2774 struct lxc_list *it;
2775 int len;
2776 int fulllen = 0;
2777 bool get_all = false;
2778
2779 if (!retv)
2780 inlen = 0;
2781 else
2782 memset(retv, 0, inlen);
2783
2784 if (!strcmp(key, "lxc.cgroup"))
2785 get_all = true;
2786 else if (!strncmp(key, "lxc.cgroup.", 11))
2787 key += 11;
2788 else
2789 return -1;
2790
2791 lxc_list_for_each(it, &c->cgroup) {
2792 struct lxc_cgroup *cg = it->elem;
2793
2794 if (get_all) {
2795 strprint(retv, inlen, "lxc.cgroup.%s = %s\n",
2796 cg->subsystem, cg->value);
2797 } else if (!strcmp(cg->subsystem, key)) {
2798 strprint(retv, inlen, "%s\n", cg->value);
2799 }
2800 }
2801
2802 return fulllen;
2803 }
2804
2805 static int get_config_cgroup_dir(const char *key, char *retv, int inlen,
2806 struct lxc_conf *lxc_conf, void *data)
2807 {
2808 int len;
2809 int fulllen = 0;
2810
2811 if (!retv)
2812 inlen = 0;
2813 else
2814 memset(retv, 0, inlen);
2815
2816 strprint(retv, inlen, "%s", lxc_conf->cgroup_meta.dir);
2817
2818 return fulllen;
2819 }
2820
2821 static int get_config_idmaps(const char *key, char *retv, int inlen,
2822 struct lxc_conf *c, void *data)
2823 {
2824 struct lxc_list *it;
2825 int len, listlen, ret;
2826 int fulllen = 0;
2827 /* "u 1000 1000000 65536"
2828 *
2829 * let's render this as
2830 *
2831 * sizeof(char)
2832 * +
2833 * sizeof(" ")
2834 * +
2835 * sizeof(uint64_t)
2836 * +
2837 * sizeof(" ")
2838 * +
2839 * sizeof(uint64_t)
2840 * +
2841 * sizeof(" ")
2842 * +
2843 * sizeof(uint64_t)
2844 * +
2845 * \0
2846 */
2847 #define __LXC_IDMAP_STR_BUF (3 * LXC_NUMSTRLEN64 + 3 + 1 + 1)
2848 char buf[__LXC_IDMAP_STR_BUF];
2849
2850 if (!retv)
2851 inlen = 0;
2852 else
2853 memset(retv, 0, inlen);
2854
2855 listlen = lxc_list_len(&c->id_map);
2856 lxc_list_for_each(it, &c->id_map)
2857 {
2858 struct id_map *map = it->elem;
2859 ret = snprintf(buf, __LXC_IDMAP_STR_BUF, "%c %lu %lu %lu",
2860 (map->idtype == ID_TYPE_UID) ? 'u' : 'g',
2861 map->nsid, map->hostid, map->range);
2862 if (ret < 0 || ret >= __LXC_IDMAP_STR_BUF)
2863 return -1;
2864
2865 strprint(retv, inlen, "%s%s", buf, (listlen-- > 1) ? "\n" : "");
2866 }
2867 return fulllen;
2868 }
2869
2870 static int get_config_log_level(const char *key, char *retv, int inlen,
2871 struct lxc_conf *c, void *data)
2872 {
2873 const char *v;
2874 v = lxc_log_priority_to_string(c->loglevel);
2875 return lxc_get_conf_str(retv, inlen, v);
2876 }
2877
2878 static int get_config_log_file(const char *key, char *retv, int inlen,
2879 struct lxc_conf *c, void *data)
2880 {
2881 return lxc_get_conf_str(retv, inlen, c->logfile);
2882 }
2883
2884 static int get_config_mount_fstab(const char *key, char *retv, int inlen,
2885 struct lxc_conf *c, void *data)
2886 {
2887 return lxc_get_conf_str(retv, inlen, c->fstab);
2888 }
2889
2890 static int get_config_mount_auto(const char *key, char *retv, int inlen,
2891 struct lxc_conf *c, void *data)
2892 {
2893 int len, fulllen = 0;
2894 const char *sep = "";
2895
2896 if (!retv)
2897 inlen = 0;
2898 else
2899 memset(retv, 0, inlen);
2900
2901 if (!(c->auto_mounts & LXC_AUTO_ALL_MASK))
2902 return 0;
2903
2904 switch (c->auto_mounts & LXC_AUTO_PROC_MASK) {
2905 case LXC_AUTO_PROC_MIXED:
2906 strprint(retv, inlen, "%sproc:mixed", sep);
2907 sep = " ";
2908 break;
2909 case LXC_AUTO_PROC_RW:
2910 strprint(retv, inlen, "%sproc:rw", sep);
2911 sep = " ";
2912 break;
2913 default:
2914 break;
2915 }
2916
2917 switch (c->auto_mounts & LXC_AUTO_SYS_MASK) {
2918 case LXC_AUTO_SYS_RO:
2919 strprint(retv, inlen, "%ssys:ro", sep);
2920 sep = " ";
2921 break;
2922 case LXC_AUTO_SYS_RW:
2923 strprint(retv, inlen, "%ssys:rw", sep);
2924 sep = " ";
2925 break;
2926 case LXC_AUTO_SYS_MIXED:
2927 strprint(retv, inlen, "%ssys:mixed", sep);
2928 sep = " ";
2929 break;
2930 default:
2931 break;
2932 }
2933
2934 switch (c->auto_mounts & LXC_AUTO_CGROUP_MASK) {
2935 case LXC_AUTO_CGROUP_NOSPEC:
2936 strprint(retv, inlen, "%scgroup", sep);
2937 sep = " ";
2938 break;
2939 case LXC_AUTO_CGROUP_MIXED:
2940 strprint(retv, inlen, "%scgroup:mixed", sep);
2941 sep = " ";
2942 break;
2943 case LXC_AUTO_CGROUP_RO:
2944 strprint(retv, inlen, "%scgroup:ro", sep);
2945 sep = " ";
2946 break;
2947 case LXC_AUTO_CGROUP_RW:
2948 strprint(retv, inlen, "%scgroup:rw", sep);
2949 sep = " ";
2950 break;
2951 case LXC_AUTO_CGROUP_FULL_NOSPEC:
2952 strprint(retv, inlen, "%scgroup-full", sep);
2953 sep = " ";
2954 break;
2955 case LXC_AUTO_CGROUP_FULL_MIXED:
2956 strprint(retv, inlen, "%scgroup-full:mixed", sep);
2957 sep = " ";
2958 break;
2959 case LXC_AUTO_CGROUP_FULL_RO:
2960 strprint(retv, inlen, "%scgroup-full:ro", sep);
2961 sep = " ";
2962 break;
2963 case LXC_AUTO_CGROUP_FULL_RW:
2964 strprint(retv, inlen, "%scgroup-full:rw", sep);
2965 sep = " ";
2966 break;
2967 default:
2968 break;
2969 }
2970
2971 return fulllen;
2972 }
2973
2974 static int get_config_mount(const char *key, char *retv, int inlen,
2975 struct lxc_conf *c, void *data)
2976 {
2977 int len, fulllen = 0;
2978 struct lxc_list *it;
2979
2980 if (!retv)
2981 inlen = 0;
2982 else
2983 memset(retv, 0, inlen);
2984
2985 lxc_list_for_each(it, &c->mount_list) {
2986 strprint(retv, inlen, "%s\n", (char *)it->elem);
2987 }
2988
2989 return fulllen;
2990 }
2991
2992 static int get_config_rootfs_path(const char *key, char *retv, int inlen,
2993 struct lxc_conf *c, void *data)
2994 {
2995 return lxc_get_conf_str(retv, inlen, c->rootfs.path);
2996 }
2997
2998 static int get_config_rootfs_mount(const char *key, char *retv, int inlen,
2999 struct lxc_conf *c, void *data)
3000 {
3001 return lxc_get_conf_str(retv, inlen, c->rootfs.mount);
3002 }
3003
3004 static int get_config_rootfs_options(const char *key, char *retv, int inlen,
3005 struct lxc_conf *c, void *data)
3006 {
3007 return lxc_get_conf_str(retv, inlen, c->rootfs.options);
3008 }
3009
3010 static int get_config_rootfs_backend(const char *key, char *retv, int inlen,
3011 struct lxc_conf *c, void *data)
3012 {
3013 return 0;
3014 }
3015
3016 static int get_config_uts_name(const char *key, char *retv, int inlen,
3017 struct lxc_conf *c, void *data)
3018 {
3019 return lxc_get_conf_str(
3020 retv, inlen,
3021 c->utsname ? c->utsname->nodename : NULL);
3022 }
3023
3024 static int get_config_hooks(const char *key, char *retv, int inlen,
3025 struct lxc_conf *c, void *data)
3026 {
3027 char *subkey;
3028 int len, fulllen = 0, found = -1;
3029 struct lxc_list *it;
3030 int i;
3031
3032 subkey = strchr(key, '.');
3033 if (subkey)
3034 subkey = strchr(subkey + 1, '.');
3035 if (!subkey)
3036 return -1;
3037 subkey++;
3038 if (!*subkey)
3039 return -1;
3040 for (i = 0; i < NUM_LXC_HOOKS; i++) {
3041 if (strcmp(lxchook_names[i], subkey) == 0) {
3042 found = i;
3043 break;
3044 }
3045 }
3046 if (found == -1)
3047 return -1;
3048
3049 if (!retv)
3050 inlen = 0;
3051 else
3052 memset(retv, 0, inlen);
3053
3054 lxc_list_for_each(it, &c->hooks[found]) {
3055 strprint(retv, inlen, "%s\n", (char *)it->elem);
3056 }
3057 return fulllen;
3058 }
3059
3060 static int get_config_net(const char *key, char *retv, int inlen,
3061 struct lxc_conf *c, void *data)
3062 {
3063 int len, fulllen = 0;
3064 struct lxc_list *it;
3065
3066 if (!retv)
3067 inlen = 0;
3068 else
3069 memset(retv, 0, inlen);
3070
3071 lxc_list_for_each(it, &c->network) {
3072 struct lxc_netdev *n = it->elem;
3073 const char *t = lxc_net_type_to_str(n->type);
3074 strprint(retv, inlen, "%s\n", t ? t : "(invalid)");
3075 }
3076
3077 return fulllen;
3078 }
3079
3080 static int get_config_cap_drop(const char *key, char *retv, int inlen,
3081 struct lxc_conf *c, void *data)
3082 {
3083 int len, fulllen = 0;
3084 struct lxc_list *it;
3085
3086 if (!retv)
3087 inlen = 0;
3088 else
3089 memset(retv, 0, inlen);
3090
3091 lxc_list_for_each(it, &c->caps) {
3092 strprint(retv, inlen, "%s\n", (char *)it->elem);
3093 }
3094
3095 return fulllen;
3096 }
3097
3098 static int get_config_cap_keep(const char *key, char *retv, int inlen,
3099 struct lxc_conf *c, void *data)
3100 {
3101 int len, fulllen = 0;
3102 struct lxc_list *it;
3103
3104 if (!retv)
3105 inlen = 0;
3106 else
3107 memset(retv, 0, inlen);
3108
3109 lxc_list_for_each(it, &c->keepcaps) {
3110 strprint(retv, inlen, "%s\n", (char *)it->elem);
3111 }
3112
3113 return fulllen;
3114 }
3115
3116 static int get_config_console_path(const char *key, char *retv, int inlen,
3117 struct lxc_conf *c, void *data)
3118 {
3119 return lxc_get_conf_str(retv, inlen, c->console.path);
3120 }
3121
3122 static int get_config_console_logfile(const char *key, char *retv, int inlen,
3123 struct lxc_conf *c, void *data)
3124 {
3125 return lxc_get_conf_str(retv, inlen, c->console.log_path);
3126 }
3127
3128 static int get_config_console_rotate(const char *key, char *retv, int inlen,
3129 struct lxc_conf *c, void *data)
3130 {
3131 return lxc_get_conf_int(c, retv, inlen, c->console.log_rotate);
3132 }
3133
3134
3135 static int get_config_console_buffer_size(const char *key, char *retv,
3136 int inlen, struct lxc_conf *c,
3137 void *data)
3138 {
3139 return lxc_get_conf_uint64(c, retv, inlen, c->autodev);
3140 }
3141
3142 static int get_config_console_buffer_logfile(const char *key, char *retv,
3143 int inlen, struct lxc_conf *c,
3144 void *data)
3145 {
3146 return lxc_get_conf_str(retv, inlen, c->console.buffer_log_file);
3147 }
3148
3149 static int get_config_seccomp_profile(const char *key, char *retv, int inlen,
3150 struct lxc_conf *c, void *data)
3151 {
3152 return lxc_get_conf_str(retv, inlen, c->seccomp);
3153 }
3154
3155 static int get_config_autodev(const char *key, char *retv, int inlen,
3156 struct lxc_conf *c, void *data)
3157 {
3158 return lxc_get_conf_int(c, retv, inlen, c->autodev);
3159 }
3160
3161 static int get_config_signal_halt(const char *key, char *retv, int inlen,
3162 struct lxc_conf *c, void *data)
3163 {
3164 return lxc_get_conf_int(c, retv, inlen, c->haltsignal);
3165 }
3166
3167 static int get_config_signal_reboot(const char *key, char *retv, int inlen,
3168 struct lxc_conf *c, void *data)
3169 {
3170 return lxc_get_conf_int(c, retv, inlen, c->rebootsignal);
3171 }
3172
3173 static int get_config_signal_stop(const char *key, char *retv, int inlen,
3174 struct lxc_conf *c, void *data)
3175 {
3176 return lxc_get_conf_int(c, retv, inlen, c->stopsignal);
3177 }
3178
3179 static int get_config_start(const char *key, char *retv, int inlen,
3180 struct lxc_conf *c, void *data)
3181 {
3182 if (strcmp(key + 10, "auto") == 0)
3183 return lxc_get_conf_int(c, retv, inlen, c->start_auto);
3184 else if (strcmp(key + 10, "delay") == 0)
3185 return lxc_get_conf_int(c, retv, inlen, c->start_delay);
3186 else if (strcmp(key + 10, "order") == 0)
3187 return lxc_get_conf_int(c, retv, inlen, c->start_order);
3188
3189 return -1;
3190 }
3191
3192 static int get_config_log_syslog(const char *key, char *retv, int inlen,
3193 struct lxc_conf *c, void *data)
3194 {
3195 return lxc_get_conf_str(retv, inlen, c->syslog);
3196 }
3197
3198 static int get_config_monitor(const char *key, char *retv, int inlen,
3199 struct lxc_conf *c, void *data)
3200 {
3201 return lxc_get_conf_int(c, retv, inlen, c->monitor_unshare);
3202 }
3203
3204 static int get_config_group(const char *key, char *retv, int inlen,
3205 struct lxc_conf *c, void *data)
3206 {
3207 int len, fulllen = 0;
3208 struct lxc_list *it;
3209
3210 if (!retv)
3211 inlen = 0;
3212 else
3213 memset(retv, 0, inlen);
3214
3215 lxc_list_for_each(it, &c->groups) {
3216 strprint(retv, inlen, "%s\n", (char *)it->elem);
3217 }
3218
3219 return fulllen;
3220 }
3221
3222 static int get_config_environment(const char *key, char *retv, int inlen,
3223 struct lxc_conf *c, void *data)
3224 {
3225 int len, fulllen = 0;
3226 struct lxc_list *it;
3227
3228 if (!retv)
3229 inlen = 0;
3230 else
3231 memset(retv, 0, inlen);
3232
3233 lxc_list_for_each(it, &c->environment) {
3234 strprint(retv, inlen, "%s\n", (char *)it->elem);
3235 }
3236
3237 return fulllen;
3238 }
3239
3240 static int get_config_execute_cmd(const char *key, char *retv, int inlen,
3241 struct lxc_conf *c, void *data)
3242 {
3243 return lxc_get_conf_str(retv, inlen, c->execute_cmd);
3244 }
3245
3246 static int get_config_init_cmd(const char *key, char *retv, int inlen,
3247 struct lxc_conf *c, void *data)
3248 {
3249 return lxc_get_conf_str(retv, inlen, c->init_cmd);
3250 }
3251
3252 static int get_config_init_uid(const char *key, char *retv, int inlen,
3253 struct lxc_conf *c, void *data)
3254 {
3255 return lxc_get_conf_int(c, retv, inlen, c->init_uid);
3256 }
3257
3258 static int get_config_init_gid(const char *key, char *retv, int inlen,
3259 struct lxc_conf *c, void *data)
3260 {
3261 return lxc_get_conf_int(c, retv, inlen, c->init_gid);
3262 }
3263
3264 static int get_config_ephemeral(const char *key, char *retv, int inlen,
3265 struct lxc_conf *c, void *data)
3266 {
3267 return lxc_get_conf_int(c, retv, inlen, c->ephemeral);
3268 }
3269
3270 static int get_config_no_new_privs(const char *key, char *retv, int inlen,
3271 struct lxc_conf *c, void *data)
3272 {
3273 return lxc_get_conf_int(c, retv, inlen, c->no_new_privs);
3274 }
3275
3276 /* If you ask for a specific value, i.e. lxc.prlimit.nofile, then just the value
3277 * will be printed. If you ask for 'lxc.prlimit', then all limit entries will be
3278 * printed, in 'lxc.prlimit.resource = value' format.
3279 */
3280 static int get_config_prlimit(const char *key, char *retv, int inlen,
3281 struct lxc_conf *c, void *data)
3282 {
3283 int fulllen = 0, len;
3284 bool get_all = false;
3285 struct lxc_list *it;
3286
3287 if (!retv)
3288 inlen = 0;
3289 else
3290 memset(retv, 0, inlen);
3291
3292 if (!strcmp(key, "lxc.prlimit"))
3293 get_all = true;
3294 else if (strncmp(key, "lxc.prlimit.", 12) == 0)
3295 key += 12;
3296 else
3297 return -1;
3298
3299 lxc_list_for_each(it, &c->limits) {
3300 char buf[LXC_NUMSTRLEN64 * 2 + 2]; /* 2 colon separated 64 bit
3301 integers or the word
3302 'unlimited' */
3303 int partlen;
3304 struct lxc_limit *lim = it->elem;
3305
3306 if (lim->limit.rlim_cur == RLIM_INFINITY) {
3307 memcpy(buf, "unlimited", sizeof("unlimited"));
3308 partlen = sizeof("unlimited") - 1;
3309 } else {
3310 partlen = sprintf(buf, "%" PRIu64,
3311 (uint64_t)lim->limit.rlim_cur);
3312 }
3313 if (lim->limit.rlim_cur != lim->limit.rlim_max) {
3314 if (lim->limit.rlim_max == RLIM_INFINITY)
3315 memcpy(buf + partlen, ":unlimited",
3316 sizeof(":unlimited"));
3317 else
3318 sprintf(buf + partlen, ":%" PRIu64,
3319 (uint64_t)lim->limit.rlim_max);
3320 }
3321
3322 if (get_all) {
3323 strprint(retv, inlen, "lxc.prlimit.%s = %s\n",
3324 lim->resource, buf);
3325 } else if (!strcmp(lim->resource, key)) {
3326 strprint(retv, inlen, "%s", buf);
3327 }
3328 }
3329
3330 return fulllen;
3331 }
3332
3333 static int get_config_noop(const char *key, char *retv, int inlen,
3334 struct lxc_conf *c, void *data)
3335 {
3336 return 0;
3337 }
3338
3339 static int get_config_namespace(const char *key, char *retv, int inlen,
3340 struct lxc_conf *c, void *data)
3341 {
3342 int len, ns_idx;
3343 const char *namespace;
3344 int fulllen = 0;
3345
3346 if (!retv)
3347 inlen = 0;
3348 else
3349 memset(retv, 0, inlen);
3350
3351 namespace = key + sizeof("lxc.namespace.") - 1;
3352 ns_idx = lxc_namespace_2_ns_idx(namespace);
3353 if (ns_idx < 0)
3354 return ns_idx;
3355
3356 strprint(retv, inlen, "%s", c->inherit_ns[ns_idx]);
3357
3358 return fulllen;
3359 }
3360
3361 /* Callbacks to clear config items. */
3362 static inline int clr_config_personality(const char *key, struct lxc_conf *c,
3363 void *data)
3364 {
3365 c->personality = -1;
3366 return 0;
3367 }
3368
3369 static inline int clr_config_pty_max(const char *key, struct lxc_conf *c,
3370 void *data)
3371 {
3372 c->pts = 0;
3373 return 0;
3374 }
3375
3376 static inline int clr_config_tty_max(const char *key, struct lxc_conf *c,
3377 void *data)
3378 {
3379 c->tty = 0;
3380 return 0;
3381 }
3382
3383 static inline int clr_config_tty_dir(const char *key, struct lxc_conf *c,
3384 void *data)
3385 {
3386 free(c->ttydir);
3387 c->ttydir = NULL;
3388 return 0;
3389 }
3390
3391 static inline int clr_config_apparmor_profile(const char *key,
3392 struct lxc_conf *c, void *data)
3393 {
3394 free(c->lsm_aa_profile);
3395 c->lsm_aa_profile = NULL;
3396 return 0;
3397 }
3398
3399 static inline int clr_config_apparmor_allow_incomplete(const char *key,
3400 struct lxc_conf *c,
3401 void *data)
3402 {
3403 c->lsm_aa_allow_incomplete = 0;
3404 return 0;
3405 }
3406
3407 static inline int clr_config_selinux_context(const char *key,
3408 struct lxc_conf *c, void *data)
3409 {
3410 free(c->lsm_se_context);
3411 c->lsm_se_context = NULL;
3412 return 0;
3413 }
3414
3415 static inline int clr_config_cgroup_controller(const char *key,
3416 struct lxc_conf *c, void *data)
3417 {
3418 return lxc_clear_cgroups(c, key);
3419 }
3420
3421 static int clr_config_cgroup_dir(const char *key, struct lxc_conf *lxc_conf,
3422 void *data)
3423 {
3424 if (lxc_conf->cgroup_meta.dir) {
3425 free(lxc_conf->cgroup_meta.dir);
3426 lxc_conf->cgroup_meta.dir = NULL;
3427 }
3428
3429 return 0;
3430 }
3431
3432 static inline int clr_config_idmaps(const char *key, struct lxc_conf *c,
3433 void *data)
3434 {
3435 return lxc_clear_idmaps(c);
3436 }
3437
3438 static inline int clr_config_log_level(const char *key, struct lxc_conf *c,
3439 void *data)
3440 {
3441 c->loglevel = LXC_LOG_LEVEL_NOTSET;
3442 return 0;
3443 }
3444
3445 static inline int clr_config_log_file(const char *key, struct lxc_conf *c,
3446 void *data)
3447 {
3448 free(c->logfile);
3449 c->logfile = NULL;
3450 return 0;
3451 }
3452
3453 static inline int clr_config_mount(const char *key, struct lxc_conf *c,
3454 void *data)
3455 {
3456 return lxc_clear_mount_entries(c);
3457 }
3458
3459 static inline int clr_config_mount_auto(const char *key, struct lxc_conf *c,
3460 void *data)
3461 {
3462 return lxc_clear_automounts(c);
3463 }
3464
3465 static inline int clr_config_mount_fstab(const char *key, struct lxc_conf *c,
3466 void *data)
3467 {
3468 free(c->fstab);
3469 c->fstab = NULL;
3470 return 0;
3471 }
3472
3473 static inline int clr_config_rootfs_path(const char *key, struct lxc_conf *c,
3474 void *data)
3475 {
3476 free(c->rootfs.path);
3477 c->rootfs.path = NULL;
3478 return 0;
3479 }
3480
3481 static inline int clr_config_rootfs_mount(const char *key, struct lxc_conf *c,
3482 void *data)
3483 {
3484 free(c->rootfs.mount);
3485 c->rootfs.mount = NULL;
3486 return 0;
3487 }
3488
3489 static inline int clr_config_rootfs_options(const char *key, struct lxc_conf *c,
3490 void *data)
3491 {
3492 free(c->rootfs.options);
3493 c->rootfs.options = NULL;
3494 return 0;
3495 }
3496
3497 static inline int clr_config_rootfs_backend(const char *key, struct lxc_conf *c,
3498 void *data)
3499 {
3500 return 0;
3501 }
3502
3503 static inline int clr_config_uts_name(const char *key, struct lxc_conf *c,
3504 void *data)
3505 {
3506 free(c->utsname);
3507 c->utsname = NULL;
3508 return 0;
3509 }
3510
3511 static inline int clr_config_hooks(const char *key, struct lxc_conf *c,
3512 void *data)
3513 {
3514 return lxc_clear_hooks(c, key);
3515 }
3516
3517 static inline int clr_config_net(const char *key, struct lxc_conf *c,
3518 void *data)
3519 {
3520 lxc_free_networks(&c->network);
3521
3522 return 0;
3523 }
3524
3525 static inline int clr_config_cap_drop(const char *key, struct lxc_conf *c,
3526 void *data)
3527 {
3528 return lxc_clear_config_caps(c);
3529 }
3530
3531 static inline int clr_config_cap_keep(const char *key, struct lxc_conf *c,
3532 void *data)
3533 {
3534 return lxc_clear_config_keepcaps(c);
3535 }
3536
3537 static inline int clr_config_console_path(const char *key, struct lxc_conf *c,
3538 void *data)
3539 {
3540 free(c->console.path);
3541 c->console.path = NULL;
3542 return 0;
3543 }
3544
3545 static inline int clr_config_console_logfile(const char *key,
3546 struct lxc_conf *c, void *data)
3547 {
3548 free(c->console.log_path);
3549 c->console.log_path = NULL;
3550 return 0;
3551 }
3552
3553 static inline int clr_config_console_rotate(const char *key, struct lxc_conf *c,
3554 void *data)
3555 {
3556 c->console.log_rotate = 0;
3557 return 0;
3558 }
3559
3560 static inline int clr_config_console_buffer_size(const char *key,
3561 struct lxc_conf *c, void *data)
3562 {
3563 c->console.buffer_size = 0;
3564 return 0;
3565 }
3566
3567 static inline int clr_config_console_buffer_logfile(const char *key,
3568 struct lxc_conf *c,
3569 void *data)
3570 {
3571 free(c->console.buffer_log_file);
3572 c->console.buffer_log_file = NULL;
3573 return 0;
3574 }
3575
3576 static inline int clr_config_seccomp_profile(const char *key,
3577 struct lxc_conf *c, void *data)
3578 {
3579 free(c->seccomp);
3580 c->seccomp = NULL;
3581 return 0;
3582 }
3583
3584 static inline int clr_config_autodev(const char *key, struct lxc_conf *c,
3585 void *data)
3586 {
3587 c->autodev = 1;
3588 return 0;
3589 }
3590
3591 static inline int clr_config_signal_halt(const char *key, struct lxc_conf *c,
3592 void *data)
3593 {
3594 c->haltsignal = 0;
3595 return 0;
3596 }
3597
3598 static inline int clr_config_signal_reboot(const char *key, struct lxc_conf *c,
3599 void *data)
3600 {
3601 c->rebootsignal = 0;
3602 return 0;
3603 }
3604
3605 static inline int clr_config_signal_stop(const char *key, struct lxc_conf *c,
3606 void *data)
3607 {
3608 c->stopsignal = 0;
3609 return 0;
3610 }
3611
3612 static inline int clr_config_start(const char *key, struct lxc_conf *c,
3613 void *data)
3614 {
3615 if (strcmp(key + 10, "auto") == 0)
3616 c->start_auto = 0;
3617 else if (strcmp(key + 10, "delay") == 0)
3618 c->start_delay = 0;
3619 else if (strcmp(key + 10, "order") == 0)
3620 c->start_order = 0;
3621
3622 return 0;
3623 }
3624
3625 static inline int clr_config_log_syslog(const char *key, struct lxc_conf *c,
3626 void *data)
3627 {
3628 free(c->syslog);
3629 c->syslog = NULL;
3630 return 0;
3631 }
3632
3633 static inline int clr_config_monitor(const char *key, struct lxc_conf *c,
3634 void *data)
3635 {
3636 c->monitor_unshare = 0;
3637 return 0;
3638 }
3639
3640 static inline int clr_config_group(const char *key, struct lxc_conf *c,
3641 void *data)
3642 {
3643 return lxc_clear_groups(c);
3644 }
3645
3646 static inline int clr_config_environment(const char *key, struct lxc_conf *c,
3647 void *data)
3648 {
3649 return lxc_clear_environment(c);
3650 }
3651
3652 static inline int clr_config_execute_cmd(const char *key, struct lxc_conf *c,
3653 void *data)
3654 {
3655 free(c->execute_cmd);
3656 c->execute_cmd = NULL;
3657 return 0;
3658 }
3659
3660 static inline int clr_config_init_cmd(const char *key, struct lxc_conf *c,
3661 void *data)
3662 {
3663 free(c->init_cmd);
3664 c->init_cmd = NULL;
3665 return 0;
3666 }
3667
3668 static inline int clr_config_init_uid(const char *key, struct lxc_conf *c,
3669 void *data)
3670 {
3671 c->init_uid = 0;
3672 return 0;
3673 }
3674
3675 static inline int clr_config_init_gid(const char *key, struct lxc_conf *c,
3676 void *data)
3677 {
3678 c->init_gid = 0;
3679 return 0;
3680 }
3681
3682 static inline int clr_config_ephemeral(const char *key, struct lxc_conf *c,
3683 void *data)
3684 {
3685 c->ephemeral = 0;
3686 return 0;
3687 }
3688
3689 static inline int clr_config_no_new_privs(const char *key, struct lxc_conf *c,
3690 void *data)
3691 {
3692 c->no_new_privs = false;
3693 return 0;
3694 }
3695
3696 static inline int clr_config_prlimit(const char *key, struct lxc_conf *c,
3697 void *data)
3698 {
3699 return lxc_clear_limits(c, key);
3700 }
3701
3702 static inline int clr_config_includefiles(const char *key, struct lxc_conf *c,
3703 void *data)
3704 {
3705 lxc_clear_includes(c);
3706 return 0;
3707 }
3708
3709 static inline int clr_config_noop(const char *key, struct lxc_conf *c,
3710 void *data)
3711 {
3712 return 0;
3713 }
3714
3715 static int clr_config_namespace(const char *key, struct lxc_conf *lxc_conf,
3716 void *data)
3717 {
3718 int ns_idx;
3719 const char *namespace;
3720
3721 namespace = key + sizeof("lxc.namespace.") - 1;
3722 ns_idx = lxc_namespace_2_ns_idx(namespace);
3723 if (ns_idx < 0)
3724 return ns_idx;
3725
3726 free(lxc_conf->inherit_ns[ns_idx]);
3727 lxc_conf->inherit_ns[ns_idx] = NULL;
3728
3729 return 0;
3730 }
3731
3732 static int get_config_includefiles(const char *key, char *retv, int inlen,
3733 struct lxc_conf *c, void *data)
3734 {
3735 return -ENOSYS;
3736 }
3737
3738 static struct lxc_config_t *get_network_config_ops(const char *key,
3739 struct lxc_conf *lxc_conf,
3740 ssize_t *idx,
3741 char **deindexed_key)
3742 {
3743 int ret;
3744 unsigned int tmpidx;
3745 size_t numstrlen;
3746 char *copy, *idx_start, *idx_end;
3747 struct lxc_config_t *config = NULL;
3748
3749 /* check that this is a sensible network key */
3750 if (strncmp("lxc.net.", key, 8)) {
3751 ERROR("Invalid network configuration key \"%s\"", key);
3752 return NULL;
3753 }
3754
3755 copy = strdup(key);
3756 if (!copy) {
3757 ERROR("Failed to duplicate string \"%s\"", key);
3758 return NULL;
3759 }
3760
3761 /* lxc.net.<n> */
3762 if (!isdigit(*(key + 8))) {
3763 ERROR("Failed to detect digit in string \"%s\"", key + 8);
3764 goto on_error;
3765 }
3766
3767 /* beginning of index string */
3768 idx_start = (copy + 7);
3769 *idx_start = '\0';
3770
3771 /* end of index string */
3772 idx_end = strchr((copy + 8), '.');
3773 if (idx_end)
3774 *idx_end = '\0';
3775
3776 /* parse current index */
3777 ret = lxc_safe_uint((idx_start + 1), &tmpidx);
3778 if (ret < 0) {
3779 ERROR("Failed to parse usigned integer from string \"%s\": %s",
3780 idx_start + 1, strerror(-ret));
3781 *idx = ret;
3782 goto on_error;
3783 }
3784
3785 /* This, of course is utterly nonsensical on so many levels, but
3786 * better safe than sorry.
3787 * (Checking for INT_MAX here is intentional.)
3788 */
3789 if (tmpidx == INT_MAX) {
3790 SYSERROR("Number of configured networks would overflow the "
3791 "counter");
3792 goto on_error;
3793 }
3794 *idx = tmpidx;
3795
3796 numstrlen = strlen((idx_start + 1));
3797
3798 /* repair configuration key */
3799 *idx_start = '.';
3800
3801 /* lxc.net.<idx>.<subkey> */
3802 if (idx_end) {
3803 *idx_end = '.';
3804 if (strlen(idx_end + 1) == 0) {
3805 ERROR("No subkey in network configuration key \"%s\"", key);
3806 goto on_error;
3807 }
3808
3809 memmove(copy + 8, idx_end + 1, strlen(idx_end + 1));
3810 copy[strlen(key) - numstrlen + 1] = '\0';
3811
3812 config = lxc_get_config(copy);
3813 if (!config) {
3814 ERROR("Unknown network configuration key \"%s\"", key);
3815 goto on_error;
3816 }
3817 }
3818
3819 if (deindexed_key)
3820 *deindexed_key = copy;
3821
3822 return config;
3823
3824 on_error:
3825 free(copy);
3826 return NULL;
3827 }
3828
3829 /* Config entry is something like "lxc.net.0.ipv4" the key 'lxc.net.' was
3830 * found. So we make sure next comes an integer, find the right callback (by
3831 * rewriting the key), and call it.
3832 */
3833 static int set_config_net_nic(const char *key, const char *value,
3834 struct lxc_conf *lxc_conf, void *data)
3835 {
3836 int ret;
3837 const char *idxstring;
3838 struct lxc_config_t *config;
3839 struct lxc_netdev *netdev;
3840 ssize_t idx = -1;
3841 char *deindexed_key = NULL;
3842
3843 idxstring = key + 8;
3844 if (!isdigit(*idxstring))
3845 return -1;
3846
3847 if (lxc_config_value_empty(value))
3848 return clr_config_net_nic(key, lxc_conf, data);
3849
3850 config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key);
3851 if (!config || idx < 0)
3852 return -1;
3853
3854 netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, true);
3855 if (!netdev) {
3856 free(deindexed_key);
3857 return -1;
3858 }
3859
3860 ret = config->set(deindexed_key, value, lxc_conf, netdev);
3861 free(deindexed_key);
3862 return ret;
3863 }
3864
3865 static int clr_config_net_nic(const char *key, struct lxc_conf *lxc_conf,
3866 void *data)
3867 {
3868 int ret;
3869 const char *idxstring;
3870 struct lxc_config_t *config;
3871 struct lxc_netdev *netdev;
3872 ssize_t idx = -1;
3873 char *deindexed_key = NULL;
3874
3875 idxstring = key + 8;
3876 if (!isdigit(*idxstring))
3877 return -1;
3878
3879 /* The left conjunct is pretty self-explanatory. The right conjunct
3880 * checks whether the two pointers are equal. If they are we know that
3881 * this is not a key that is namespaced any further and so we are
3882 * supposed to clear the whole network.
3883 */
3884 if (isdigit(*idxstring) && (strrchr(key, '.') == (idxstring - 1))) {
3885 unsigned int rmnetdevidx;
3886
3887 if (lxc_safe_uint(idxstring, &rmnetdevidx) < 0)
3888 return -1;
3889
3890 /* Remove network from network list. */
3891 lxc_remove_nic_by_idx(lxc_conf, rmnetdevidx);
3892 return 0;
3893 }
3894
3895 config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key);
3896 if (!config || idx < 0)
3897 return -1;
3898
3899 netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, false);
3900 if (!netdev) {
3901 free(deindexed_key);
3902 return -1;
3903 }
3904
3905 ret = config->clr(deindexed_key, lxc_conf, netdev);
3906 free(deindexed_key);
3907 return ret;
3908 }
3909
3910 static int clr_config_net_type(const char *key, struct lxc_conf *lxc_conf,
3911 void *data)
3912 {
3913 struct lxc_netdev *netdev;
3914
3915 if (!data)
3916 return -1;
3917 else
3918 netdev = data;
3919 if (!netdev)
3920 return -1;
3921
3922 netdev->type = -1;
3923
3924 return 0;
3925 }
3926
3927 static int clr_config_net_name(const char *key, struct lxc_conf *lxc_conf,
3928 void *data)
3929 {
3930 struct lxc_netdev *netdev;
3931
3932 if (!data)
3933 return -1;
3934 else
3935 netdev = data;
3936 if (!netdev)
3937 return -1;
3938
3939 netdev->name[0] = '\0';
3940
3941 return 0;
3942 }
3943
3944 static int clr_config_net_flags(const char *key, struct lxc_conf *lxc_conf,
3945 void *data)
3946 {
3947 struct lxc_netdev *netdev;
3948
3949 if (!data)
3950 return -1;
3951 else
3952 netdev = data;
3953 if (!netdev)
3954 return -1;
3955
3956 netdev->flags = 0;
3957
3958 return 0;
3959 }
3960
3961 static int clr_config_net_link(const char *key, struct lxc_conf *lxc_conf,
3962 void *data)
3963 {
3964 struct lxc_netdev *netdev;
3965
3966 if (!data)
3967 return -1;
3968 else
3969 netdev = data;
3970 if (!netdev)
3971 return -1;
3972
3973 netdev->link[0] = '\0';
3974
3975 return 0;
3976 }
3977
3978 static int clr_config_net_macvlan_mode(const char *key,
3979 struct lxc_conf *lxc_conf, void *data)
3980 {
3981 struct lxc_netdev *netdev;
3982
3983 if (!data)
3984 return -1;
3985 else
3986 netdev = data;
3987 if (!netdev)
3988 return -1;
3989
3990 if (netdev->type != LXC_NET_MACVLAN)
3991 return 0;
3992
3993 netdev->priv.macvlan_attr.mode = -1;
3994
3995 return 0;
3996 }
3997
3998 static int clr_config_net_veth_pair(const char *key, struct lxc_conf *lxc_conf,
3999 void *data)
4000 {
4001 struct lxc_netdev *netdev;
4002
4003 if (!data)
4004 return -1;
4005 else
4006 netdev = data;
4007 if (!netdev)
4008 return -1;
4009
4010 netdev->priv.veth_attr.pair[0] = '\0';
4011
4012 return 0;
4013 }
4014
4015 static int clr_config_net_script_up(const char *key, struct lxc_conf *lxc_conf,
4016 void *data)
4017 {
4018 struct lxc_netdev *netdev;
4019
4020 if (!data)
4021 return -1;
4022 else
4023 netdev = data;
4024 if (!netdev)
4025 return -1;
4026
4027 free(netdev->upscript);
4028 netdev->upscript = NULL;
4029
4030 return 0;
4031 }
4032
4033 static int clr_config_net_script_down(const char *key,
4034 struct lxc_conf *lxc_conf, void *data)
4035 {
4036 struct lxc_netdev *netdev;
4037
4038 if (!data)
4039 return -1;
4040 else
4041 netdev = data;
4042 if (!netdev)
4043 return -1;
4044
4045 free(netdev->downscript);
4046 netdev->downscript = NULL;
4047
4048 return 0;
4049 }
4050
4051 static int clr_config_net_hwaddr(const char *key, struct lxc_conf *lxc_conf,
4052 void *data)
4053 {
4054 struct lxc_netdev *netdev;
4055
4056 if (!data)
4057 return -1;
4058 else
4059 netdev = data;
4060 if (!netdev)
4061 return -1;
4062
4063 free(netdev->hwaddr);
4064 netdev->hwaddr = NULL;
4065
4066 return 0;
4067 }
4068
4069 static int clr_config_net_mtu(const char *key, struct lxc_conf *lxc_conf,
4070 void *data)
4071 {
4072 struct lxc_netdev *netdev;
4073
4074 if (!data)
4075 return -1;
4076 else
4077 netdev = data;
4078 if (!netdev)
4079 return -1;
4080
4081 free(netdev->mtu);
4082 netdev->mtu = NULL;
4083
4084 return 0;
4085 }
4086
4087 static int clr_config_net_vlan_id(const char *key, struct lxc_conf *lxc_conf,
4088 void *data)
4089 {
4090 struct lxc_netdev *netdev;
4091
4092 if (!data)
4093 return -1;
4094 else
4095 netdev = data;
4096 if (!netdev)
4097 return -1;
4098
4099 netdev->priv.vlan_attr.vid = 0;
4100
4101 return 0;
4102 }
4103
4104 static int clr_config_net_ipv4_gateway(const char *key,
4105 struct lxc_conf *lxc_conf, void *data)
4106 {
4107 struct lxc_netdev *netdev;
4108
4109 if (!data)
4110 return -1;
4111 else
4112 netdev = data;
4113 if (!netdev)
4114 return -1;
4115
4116 free(netdev->ipv4_gateway);
4117 netdev->ipv4_gateway = NULL;
4118
4119 return 0;
4120 }
4121
4122 static int clr_config_net_ipv4_address(const char *key,
4123 struct lxc_conf *lxc_conf, void *data)
4124 {
4125 struct lxc_netdev *netdev;
4126 struct lxc_list *cur, *next;
4127
4128 if (!data)
4129 return -1;
4130 else
4131 netdev = data;
4132 if (!netdev)
4133 return -1;
4134
4135 lxc_list_for_each_safe(cur, &netdev->ipv4, next) {
4136 lxc_list_del(cur);
4137 free(cur->elem);
4138 free(cur);
4139 }
4140
4141 return 0;
4142 }
4143
4144 static int clr_config_net_ipv6_gateway(const char *key,
4145 struct lxc_conf *lxc_conf, void *data)
4146 {
4147 struct lxc_netdev *netdev;
4148
4149 if (!data)
4150 return -1;
4151 else
4152 netdev = data;
4153 if (!netdev)
4154 return -1;
4155
4156 free(netdev->ipv6_gateway);
4157 netdev->ipv6_gateway = NULL;
4158
4159 return 0;
4160 }
4161
4162 static int clr_config_net_ipv6_address(const char *key,
4163 struct lxc_conf *lxc_conf, void *data)
4164 {
4165 struct lxc_netdev *netdev;
4166 struct lxc_list *cur, *next;
4167
4168 if (!data)
4169 return -1;
4170 else
4171 netdev = data;
4172 if (!netdev)
4173 return -1;
4174
4175 lxc_list_for_each_safe(cur, &netdev->ipv6, next) {
4176 lxc_list_del(cur);
4177 free(cur->elem);
4178 free(cur);
4179 }
4180
4181 return 0;
4182 }
4183
4184 static int get_config_net_nic(const char *key, char *retv, int inlen,
4185 struct lxc_conf *c, void *data)
4186 {
4187 int ret;
4188 const char *idxstring;
4189 struct lxc_config_t *config;
4190 struct lxc_netdev *netdev;
4191 ssize_t idx = -1;
4192 char *deindexed_key = NULL;
4193
4194 idxstring = key + 8;
4195 if (!isdigit(*idxstring))
4196 return -1;
4197
4198 config = get_network_config_ops(key, c, &idx, &deindexed_key);
4199 if (!config || idx < 0)
4200 return -1;
4201
4202 netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false);
4203 if (!netdev) {
4204 free(deindexed_key);
4205 return -1;
4206 }
4207
4208 ret = config->get(deindexed_key, retv, inlen, c, netdev);
4209 free(deindexed_key);
4210 return ret;
4211 }
4212
4213 static int get_config_net_type(const char *key, char *retv, int inlen,
4214 struct lxc_conf *c, void *data)
4215 {
4216 int len, fulllen = 0;
4217 struct lxc_netdev *netdev;
4218
4219 if (!retv)
4220 inlen = 0;
4221 else
4222 memset(retv, 0, inlen);
4223
4224 if (!data)
4225 return -1;
4226 else
4227 netdev = data;
4228 if (!netdev)
4229 return -1;
4230
4231 strprint(retv, inlen, "%s", lxc_net_type_to_str(netdev->type));
4232
4233 return fulllen;
4234 }
4235
4236 static int get_config_net_flags(const char *key, char *retv, int inlen,
4237 struct lxc_conf *c, void *data)
4238 {
4239 int len, fulllen = 0;
4240 struct lxc_netdev *netdev;
4241
4242 if (!retv)
4243 inlen = 0;
4244 else
4245 memset(retv, 0, inlen);
4246
4247 if (!data)
4248 return -1;
4249 else
4250 netdev = data;
4251 if (!netdev)
4252 return -1;
4253
4254 if (netdev->flags & IFF_UP)
4255 strprint(retv, inlen, "up");
4256
4257 return fulllen;
4258 }
4259
4260 static int get_config_net_link(const char *key, char *retv, int inlen,
4261 struct lxc_conf *c, void *data)
4262 {
4263 int len, fulllen = 0;
4264 struct lxc_netdev *netdev;
4265
4266 if (!retv)
4267 inlen = 0;
4268 else
4269 memset(retv, 0, inlen);
4270
4271 if (!data)
4272 return -1;
4273 else
4274 netdev = data;
4275 if (!netdev)
4276 return -1;
4277
4278 if (netdev->link[0] != '\0')
4279 strprint(retv, inlen, "%s", netdev->link);
4280
4281 return fulllen;
4282 }
4283
4284 static int get_config_net_name(const char *key, char *retv, int inlen,
4285 struct lxc_conf *c, void *data)
4286 {
4287 int len, fulllen = 0;
4288 struct lxc_netdev *netdev;
4289
4290 if (!retv)
4291 inlen = 0;
4292 else
4293 memset(retv, 0, inlen);
4294
4295 if (!data)
4296 return -1;
4297 else
4298 netdev = data;
4299 if (!netdev)
4300 return -1;
4301
4302 if (netdev->name[0] != '\0')
4303 strprint(retv, inlen, "%s", netdev->name);
4304
4305 return fulllen;
4306 }
4307
4308 static int get_config_net_macvlan_mode(const char *key, char *retv, int inlen,
4309 struct lxc_conf *c, void *data)
4310 {
4311 const char *mode;
4312 int len, fulllen = 0;
4313 struct lxc_netdev *netdev;
4314
4315 if (!retv)
4316 inlen = 0;
4317 else
4318 memset(retv, 0, inlen);
4319
4320 if (!data)
4321 return -1;
4322 else
4323 netdev = data;
4324 if (!netdev)
4325 return -1;
4326
4327 if (netdev->type != LXC_NET_MACVLAN)
4328 return 0;
4329
4330 switch (netdev->priv.macvlan_attr.mode) {
4331 case MACVLAN_MODE_PRIVATE:
4332 mode = "private";
4333 break;
4334 case MACVLAN_MODE_VEPA:
4335 mode = "vepa";
4336 break;
4337 case MACVLAN_MODE_BRIDGE:
4338 mode = "bridge";
4339 break;
4340 case MACVLAN_MODE_PASSTHRU:
4341 mode = "passthru";
4342 break;
4343 default:
4344 mode = "(invalid)";
4345 break;
4346 }
4347
4348 strprint(retv, inlen, "%s", mode);
4349
4350 return fulllen;
4351 }
4352
4353 static int get_config_net_veth_pair(const char *key, char *retv, int inlen,
4354 struct lxc_conf *c, void *data)
4355 {
4356 int len, fulllen = 0;
4357 struct lxc_netdev *netdev;
4358
4359 if (!retv)
4360 inlen = 0;
4361 else
4362 memset(retv, 0, inlen);
4363
4364 if (!data)
4365 return -1;
4366 else
4367 netdev = data;
4368 if (!netdev)
4369 return -1;
4370
4371 if (netdev->type != LXC_NET_VETH)
4372 return 0;
4373
4374 strprint(retv, inlen, "%s",
4375 netdev->priv.veth_attr.pair[0] != '\0'
4376 ? netdev->priv.veth_attr.pair
4377 : netdev->priv.veth_attr.veth1);
4378
4379 return fulllen;
4380 }
4381
4382 static int get_config_net_script_up(const char *key, char *retv, int inlen,
4383 struct lxc_conf *c, void *data)
4384 {
4385 int len, fulllen = 0;
4386 struct lxc_netdev *netdev;
4387
4388 if (!retv)
4389 inlen = 0;
4390 else
4391 memset(retv, 0, inlen);
4392
4393 if (!data)
4394 return -1;
4395 else
4396 netdev = data;
4397 if (!netdev)
4398 return -1;
4399
4400 if (netdev->upscript)
4401 strprint(retv, inlen, "%s", netdev->upscript);
4402
4403 return fulllen;
4404 }
4405
4406 static int get_config_net_script_down(const char *key, char *retv, int inlen,
4407 struct lxc_conf *c, void *data)
4408 {
4409 int len, fulllen = 0;
4410 struct lxc_netdev *netdev;
4411
4412 if (!retv)
4413 inlen = 0;
4414 else
4415 memset(retv, 0, inlen);
4416
4417 if (!data)
4418 return -1;
4419 else
4420 netdev = data;
4421 if (!netdev)
4422 return -1;
4423
4424 if (netdev->downscript)
4425 strprint(retv, inlen, "%s", netdev->downscript);
4426
4427 return fulllen;
4428 }
4429
4430 static int get_config_net_hwaddr(const char *key, char *retv, int inlen,
4431 struct lxc_conf *c, void *data)
4432 {
4433 int len, fulllen = 0;
4434 struct lxc_netdev *netdev;
4435
4436 if (!retv)
4437 inlen = 0;
4438 else
4439 memset(retv, 0, inlen);
4440
4441 if (!data)
4442 return -1;
4443 else
4444 netdev = data;
4445 if (!netdev)
4446 return -1;
4447
4448 if (netdev->hwaddr)
4449 strprint(retv, inlen, "%s", netdev->hwaddr);
4450
4451 return fulllen;
4452 }
4453
4454 static int get_config_net_mtu(const char *key, char *retv, int inlen,
4455 struct lxc_conf *c, void *data)
4456 {
4457 int len, fulllen = 0;
4458 struct lxc_netdev *netdev;
4459
4460 if (!retv)
4461 inlen = 0;
4462 else
4463 memset(retv, 0, inlen);
4464
4465 if (!data)
4466 return -1;
4467 else
4468 netdev = data;
4469 if (!netdev)
4470 return -1;
4471
4472 if (netdev->mtu)
4473 strprint(retv, inlen, "%s", netdev->mtu);
4474
4475 return fulllen;
4476 }
4477
4478 static int get_config_net_vlan_id(const char *key, char *retv, int inlen,
4479 struct lxc_conf *c, void *data)
4480 {
4481 int len, fulllen = 0;
4482 struct lxc_netdev *netdev;
4483
4484 if (!retv)
4485 inlen = 0;
4486 else
4487 memset(retv, 0, inlen);
4488
4489 if (!data)
4490 return -1;
4491 else
4492 netdev = data;
4493 if (!netdev)
4494 return -1;
4495
4496 if (netdev->type != LXC_NET_VLAN)
4497 return 0;
4498
4499 strprint(retv, inlen, "%d", netdev->priv.vlan_attr.vid);
4500
4501 return fulllen;
4502 }
4503
4504 static int get_config_net_ipv4_gateway(const char *key, char *retv, int inlen,
4505 struct lxc_conf *c, void *data)
4506 {
4507 int len, fulllen = 0;
4508 char buf[INET_ADDRSTRLEN];
4509 struct lxc_netdev *netdev;
4510
4511 if (!retv)
4512 inlen = 0;
4513 else
4514 memset(retv, 0, inlen);
4515
4516 if (!data)
4517 return -1;
4518 else
4519 netdev = data;
4520 if (!netdev)
4521 return -1;
4522
4523 if (netdev->ipv4_gateway_auto) {
4524 strprint(retv, inlen, "auto");
4525 } else if (netdev->ipv4_gateway) {
4526 inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf));
4527 strprint(retv, inlen, "%s", buf);
4528 }
4529
4530 return fulllen;
4531 }
4532
4533 static int get_config_net_ipv4_address(const char *key, char *retv, int inlen,
4534 struct lxc_conf *c, void *data)
4535 {
4536 int len, fulllen = 0;
4537 size_t listlen;
4538 char buf[INET_ADDRSTRLEN];
4539 struct lxc_netdev *netdev;
4540 struct lxc_list *it;
4541
4542 if (!retv)
4543 inlen = 0;
4544 else
4545 memset(retv, 0, inlen);
4546
4547 if (!data)
4548 return -1;
4549 else
4550 netdev = data;
4551 if (!netdev)
4552 return -1;
4553
4554 listlen = lxc_list_len(&netdev->ipv4);
4555 lxc_list_for_each(it, &netdev->ipv4) {
4556 struct lxc_inetdev *i = it->elem;
4557 inet_ntop(AF_INET, &i->addr, buf, sizeof(buf));
4558 strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
4559 (listlen-- > 1) ? "\n" : "");
4560 }
4561
4562 return fulllen;
4563 }
4564
4565 static int get_config_net_ipv6_gateway(const char *key, char *retv, int inlen,
4566 struct lxc_conf *c, void *data)
4567 {
4568 int len, fulllen = 0;
4569 char buf[INET6_ADDRSTRLEN];
4570 struct lxc_netdev *netdev;
4571
4572 if (!retv)
4573 inlen = 0;
4574 else
4575 memset(retv, 0, inlen);
4576
4577 if (!data)
4578 return -1;
4579 else
4580 netdev = data;
4581 if (!netdev)
4582 return -1;
4583
4584 if (netdev->ipv6_gateway_auto) {
4585 strprint(retv, inlen, "auto");
4586 } else if (netdev->ipv6_gateway) {
4587 inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf));
4588 strprint(retv, inlen, "%s", buf);
4589 }
4590
4591 return fulllen;
4592 }
4593
4594 static int get_config_net_ipv6_address(const char *key, char *retv, int inlen,
4595 struct lxc_conf *c, void *data)
4596 {
4597 int len, fulllen = 0;
4598 size_t listlen;
4599 char buf[INET6_ADDRSTRLEN];
4600 struct lxc_netdev *netdev;
4601 struct lxc_list *it;
4602
4603 if (!retv)
4604 inlen = 0;
4605 else
4606 memset(retv, 0, inlen);
4607
4608 if (!data)
4609 return -1;
4610 else
4611 netdev = data;
4612 if (!netdev)
4613 return -1;
4614
4615 listlen = lxc_list_len(&netdev->ipv6);
4616 lxc_list_for_each(it, &netdev->ipv6) {
4617 struct lxc_inet6dev *i = it->elem;
4618 inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf));
4619 strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
4620 (listlen-- > 1) ? "\n" : "");
4621 }
4622
4623 return fulllen;
4624 }
4625
4626 int lxc_list_config_items(char *retv, int inlen)
4627 {
4628 size_t i;
4629 int len;
4630 int fulllen = 0;
4631
4632 if (!retv)
4633 inlen = 0;
4634 else
4635 memset(retv, 0, inlen);
4636
4637 for (i = 0; i < config_size; i++) {
4638 char *s = config[i].name;
4639
4640 if (s[strlen(s) - 1] == '.')
4641 continue;
4642
4643 strprint(retv, inlen, "%s\n", s);
4644 }
4645
4646 return fulllen;
4647 }
4648
4649 int lxc_list_subkeys(struct lxc_conf *conf, const char *key, char *retv,
4650 int inlen)
4651 {
4652 int len;
4653 int fulllen = 0;
4654
4655 if (!retv)
4656 inlen = 0;
4657 else
4658 memset(retv, 0, inlen);
4659
4660 if (!strcmp(key, "lxc.apparmor")) {
4661 strprint(retv, inlen, "allow_incomplete\n");
4662 strprint(retv, inlen, "profile\n");
4663 } else if (!strcmp(key, "lxc.cgroup")) {
4664 strprint(retv, inlen, "dir\n");
4665 } else if (!strcmp(key, "lxc.selinux")) {
4666 strprint(retv, inlen, "context\n");
4667 } else if (!strcmp(key, "lxc.mount")) {
4668 strprint(retv, inlen, "auto\n");
4669 strprint(retv, inlen, "entry\n");
4670 strprint(retv, inlen, "fstab\n");
4671 } else if (!strcmp(key, "lxc.rootfs")) {
4672 strprint(retv, inlen, "mount\n");
4673 strprint(retv, inlen, "options\n");
4674 strprint(retv, inlen, "path\n");
4675 } else if (!strcmp(key, "lxc.uts")) {
4676 strprint(retv, inlen, "name\n");
4677 } else if (!strcmp(key, "lxc.hook")) {
4678 strprint(retv, inlen, "autodev\n");
4679 strprint(retv, inlen, "clone\n");
4680 strprint(retv, inlen, "destroy\n");
4681 strprint(retv, inlen, "mount\n");
4682 strprint(retv, inlen, "post-stop\n");
4683 strprint(retv, inlen, "pre-mount\n");
4684 strprint(retv, inlen, "pre-start\n");
4685 strprint(retv, inlen, "start-host\n");
4686 strprint(retv, inlen, "start\n");
4687 strprint(retv, inlen, "stop\n");
4688 } else if (!strcmp(key, "lxc.cap")) {
4689 strprint(retv, inlen, "drop\n");
4690 strprint(retv, inlen, "keep\n");
4691 } else if (!strcmp(key, "lxc.console")) {
4692 strprint(retv, inlen, "logfile\n");
4693 strprint(retv, inlen, "path\n");
4694 } else if (!strcmp(key, "lxc.seccomp")) {
4695 strprint(retv, inlen, "profile\n");
4696 } else if (!strcmp(key, "lxc.signal")) {
4697 strprint(retv, inlen, "halt\n");
4698 strprint(retv, inlen, "reboot\n");
4699 strprint(retv, inlen, "stop\n");
4700 } else if (!strcmp(key, "lxc.start")) {
4701 strprint(retv, inlen, "auto\n");
4702 strprint(retv, inlen, "delay\n");
4703 strprint(retv, inlen, "order\n");
4704 } else if (!strcmp(key, "lxc.monitor")) {
4705 strprint(retv, inlen, "unshare\n");
4706 } else {
4707 fulllen = -1;
4708 }
4709
4710 return fulllen;
4711 }
4712
4713 int lxc_list_net(struct lxc_conf *c, const char *key, char *retv, int inlen)
4714 {
4715 int len;
4716 const char *idxstring;
4717 struct lxc_netdev *netdev;
4718 int fulllen = 0;
4719 ssize_t idx = -1;
4720
4721 idxstring = key + 8;
4722 if (!isdigit(*idxstring))
4723 return -1;
4724
4725 (void)get_network_config_ops(key, c, &idx, NULL);
4726 if (idx < 0)
4727 return -1;
4728
4729 netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false);
4730 if (!netdev)
4731 return -1;
4732
4733 if (!retv)
4734 inlen = 0;
4735 else
4736 memset(retv, 0, inlen);
4737
4738 strprint(retv, inlen, "type\n");
4739 strprint(retv, inlen, "script.up\n");
4740 strprint(retv, inlen, "script.down\n");
4741 if (netdev->type != LXC_NET_EMPTY) {
4742 strprint(retv, inlen, "flags\n");
4743 strprint(retv, inlen, "link\n");
4744 strprint(retv, inlen, "name\n");
4745 strprint(retv, inlen, "hwaddr\n");
4746 strprint(retv, inlen, "mtu\n");
4747 strprint(retv, inlen, "ipv6.address\n");
4748 strprint(retv, inlen, "ipv6.gateway\n");
4749 strprint(retv, inlen, "ipv4.address\n");
4750 strprint(retv, inlen, "ipv4.gateway\n");
4751 }
4752
4753 switch (netdev->type) {
4754 case LXC_NET_VETH:
4755 strprint(retv, inlen, "veth.pair\n");
4756 break;
4757 case LXC_NET_MACVLAN:
4758 strprint(retv, inlen, "macvlan.mode\n");
4759 break;
4760 case LXC_NET_VLAN:
4761 strprint(retv, inlen, "vlan.id\n");
4762 break;
4763 case LXC_NET_PHYS:
4764 break;
4765 }
4766
4767 return fulllen;
4768 }
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