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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 #ifndef _GNU_SOURCE
26 #define _GNU_SOURCE 1
27 #endif
28 #define __STDC_FORMAT_MACROS
29 #include <arpa/inet.h>
30 #include <ctype.h>
31 #include <dirent.h>
32 #include <errno.h>
33 #include <fcntl.h>
34 #include <inttypes.h>
35 #include <net/if.h>
36 #include <netinet/in.h>
37 #include <signal.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <sys/param.h>
42 #include <sys/stat.h>
43 #include <sys/types.h>
44 #include <sys/utsname.h>
45 #include <syslog.h>
46 #include <time.h>
47 #include <unistd.h>
48
49 #include "conf.h"
50 #include "config.h"
51 #include "confile.h"
52 #include "confile_utils.h"
53 #include "../include/netns_ifaddrs.h"
54 #include "log.h"
55 #include "lxcseccomp.h"
56 #include "network.h"
57 #include "parse.h"
58 #include "storage.h"
59 #include "utils.h"
60
61 #if HAVE_SYS_PERSONALITY_H
62 #include <sys/personality.h>
63 #endif
64
65 #ifndef HAVE_STRLCPY
66 #include "include/strlcpy.h"
67 #endif
68
69 #ifndef HAVE_STRLCAT
70 #include "include/strlcat.h"
71 #endif
72
73 lxc_log_define(confile, lxc);
74
75 #define lxc_config_define(name) \
76 __hot static int set_config_##name(const char *, const char *, \
77 struct lxc_conf *, void *); \
78 __hot static int get_config_##name(const char *, char *, int, \
79 struct lxc_conf *, void *); \
80 __hot static int clr_config_##name(const char *, struct lxc_conf *, \
81 void *);
82
83 lxc_config_define(autodev);
84 lxc_config_define(apparmor_allow_incomplete);
85 lxc_config_define(apparmor_allow_nesting);
86 lxc_config_define(apparmor_profile);
87 lxc_config_define(apparmor_raw);
88 lxc_config_define(cap_drop);
89 lxc_config_define(cap_keep);
90 lxc_config_define(cgroup_controller);
91 lxc_config_define(cgroup2_controller);
92 lxc_config_define(cgroup_dir);
93 lxc_config_define(cgroup_relative);
94 lxc_config_define(console_buffer_size);
95 lxc_config_define(console_logfile);
96 lxc_config_define(console_path);
97 lxc_config_define(console_rotate);
98 lxc_config_define(console_size);
99 lxc_config_define(environment);
100 lxc_config_define(ephemeral);
101 lxc_config_define(execute_cmd);
102 lxc_config_define(group);
103 lxc_config_define(hooks);
104 lxc_config_define(hooks_version);
105 lxc_config_define(idmaps);
106 lxc_config_define(includefiles);
107 lxc_config_define(init_cmd);
108 lxc_config_define(init_cwd);
109 lxc_config_define(init_gid);
110 lxc_config_define(init_uid);
111 lxc_config_define(log_file);
112 lxc_config_define(log_level);
113 lxc_config_define(log_syslog);
114 lxc_config_define(monitor);
115 lxc_config_define(monitor_signal_pdeath);
116 lxc_config_define(mount);
117 lxc_config_define(mount_auto);
118 lxc_config_define(mount_fstab);
119 lxc_config_define(namespace_clone);
120 lxc_config_define(namespace_keep);
121 lxc_config_define(namespace_share);
122 lxc_config_define(net);
123 lxc_config_define(net_flags);
124 lxc_config_define(net_hwaddr);
125 lxc_config_define(net_ipv4_address);
126 lxc_config_define(net_ipv4_gateway);
127 lxc_config_define(net_ipv6_address);
128 lxc_config_define(net_ipv6_gateway);
129 lxc_config_define(net_link);
130 lxc_config_define(net_macvlan_mode);
131 lxc_config_define(net_mtu);
132 lxc_config_define(net_name);
133 lxc_config_define(net_nic);
134 lxc_config_define(net_script_down);
135 lxc_config_define(net_script_up);
136 lxc_config_define(net_type);
137 lxc_config_define(net_veth_pair);
138 lxc_config_define(net_vlan_id);
139 lxc_config_define(no_new_privs);
140 lxc_config_define(personality);
141 lxc_config_define(prlimit);
142 lxc_config_define(pty_max);
143 lxc_config_define(rootfs_managed);
144 lxc_config_define(rootfs_mount);
145 lxc_config_define(rootfs_options);
146 lxc_config_define(rootfs_path);
147 lxc_config_define(seccomp_profile);
148 lxc_config_define(selinux_context);
149 lxc_config_define(signal_halt);
150 lxc_config_define(signal_reboot);
151 lxc_config_define(signal_stop);
152 lxc_config_define(start);
153 lxc_config_define(tty_max);
154 lxc_config_define(tty_dir);
155 lxc_config_define(uts_name);
156 lxc_config_define(sysctl);
157 lxc_config_define(proc);
158
159 static struct lxc_config_t config_jump_table[] = {
160 { "lxc.arch", set_config_personality, get_config_personality, clr_config_personality, },
161 { "lxc.apparmor.profile", set_config_apparmor_profile, get_config_apparmor_profile, clr_config_apparmor_profile, },
162 { "lxc.apparmor.allow_incomplete", set_config_apparmor_allow_incomplete, get_config_apparmor_allow_incomplete, clr_config_apparmor_allow_incomplete, },
163 { "lxc.apparmor.allow_nesting", set_config_apparmor_allow_nesting, get_config_apparmor_allow_nesting, clr_config_apparmor_allow_nesting, },
164 { "lxc.apparmor.raw", set_config_apparmor_raw, get_config_apparmor_raw, clr_config_apparmor_raw, },
165 { "lxc.autodev", set_config_autodev, get_config_autodev, clr_config_autodev, },
166 { "lxc.cap.drop", set_config_cap_drop, get_config_cap_drop, clr_config_cap_drop, },
167 { "lxc.cap.keep", set_config_cap_keep, get_config_cap_keep, clr_config_cap_keep, },
168 { "lxc.cgroup2", set_config_cgroup2_controller, get_config_cgroup2_controller, clr_config_cgroup2_controller, },
169 { "lxc.cgroup.dir", set_config_cgroup_dir, get_config_cgroup_dir, clr_config_cgroup_dir, },
170 { "lxc.cgroup.relative", set_config_cgroup_relative, get_config_cgroup_relative, clr_config_cgroup_relative, },
171 { "lxc.cgroup", set_config_cgroup_controller, get_config_cgroup_controller, clr_config_cgroup_controller, },
172 { "lxc.console.buffer.size", set_config_console_buffer_size, get_config_console_buffer_size, clr_config_console_buffer_size, },
173 { "lxc.console.logfile", set_config_console_logfile, get_config_console_logfile, clr_config_console_logfile, },
174 { "lxc.console.path", set_config_console_path, get_config_console_path, clr_config_console_path, },
175 { "lxc.console.rotate", set_config_console_rotate, get_config_console_rotate, clr_config_console_rotate, },
176 { "lxc.console.size", set_config_console_size, get_config_console_size, clr_config_console_size, },
177 { "lxc.environment", set_config_environment, get_config_environment, clr_config_environment, },
178 { "lxc.ephemeral", set_config_ephemeral, get_config_ephemeral, clr_config_ephemeral, },
179 { "lxc.execute.cmd", set_config_execute_cmd, get_config_execute_cmd, clr_config_execute_cmd, },
180 { "lxc.group", set_config_group, get_config_group, clr_config_group, },
181 { "lxc.hook.autodev", set_config_hooks, get_config_hooks, clr_config_hooks, },
182 { "lxc.hook.clone", set_config_hooks, get_config_hooks, clr_config_hooks, },
183 { "lxc.hook.destroy", set_config_hooks, get_config_hooks, clr_config_hooks, },
184 { "lxc.hook.mount", set_config_hooks, get_config_hooks, clr_config_hooks, },
185 { "lxc.hook.post-stop", set_config_hooks, get_config_hooks, clr_config_hooks, },
186 { "lxc.hook.pre-mount", set_config_hooks, get_config_hooks, clr_config_hooks, },
187 { "lxc.hook.pre-start", set_config_hooks, get_config_hooks, clr_config_hooks, },
188 { "lxc.hook.start", set_config_hooks, get_config_hooks, clr_config_hooks, },
189 { "lxc.hook.start-host", set_config_hooks, get_config_hooks, clr_config_hooks, },
190 { "lxc.hook.stop", set_config_hooks, get_config_hooks, clr_config_hooks, },
191 { "lxc.hook.version", set_config_hooks_version, get_config_hooks_version, clr_config_hooks_version, },
192 { "lxc.hook", set_config_hooks, get_config_hooks, clr_config_hooks, },
193 { "lxc.idmap", set_config_idmaps, get_config_idmaps, clr_config_idmaps, },
194 { "lxc.include", set_config_includefiles, get_config_includefiles, clr_config_includefiles, },
195 { "lxc.init.cmd", set_config_init_cmd, get_config_init_cmd, clr_config_init_cmd, },
196 { "lxc.init.gid", set_config_init_gid, get_config_init_gid, clr_config_init_gid, },
197 { "lxc.init.uid", set_config_init_uid, get_config_init_uid, clr_config_init_uid, },
198 { "lxc.init.cwd", set_config_init_cwd, get_config_init_cwd, clr_config_init_cwd, },
199 { "lxc.log.file", set_config_log_file, get_config_log_file, clr_config_log_file, },
200 { "lxc.log.level", set_config_log_level, get_config_log_level, clr_config_log_level, },
201 { "lxc.log.syslog", set_config_log_syslog, get_config_log_syslog, clr_config_log_syslog, },
202 { "lxc.monitor.unshare", set_config_monitor, get_config_monitor, clr_config_monitor, },
203 { "lxc.monitor.signal.pdeath", set_config_monitor_signal_pdeath, get_config_monitor_signal_pdeath, clr_config_monitor_signal_pdeath, },
204 { "lxc.mount.auto", set_config_mount_auto, get_config_mount_auto, clr_config_mount_auto, },
205 { "lxc.mount.entry", set_config_mount, get_config_mount, clr_config_mount, },
206 { "lxc.mount.fstab", set_config_mount_fstab, get_config_mount_fstab, clr_config_mount_fstab, },
207 { "lxc.namespace.clone", set_config_namespace_clone, get_config_namespace_clone, clr_config_namespace_clone, },
208 { "lxc.namespace.keep", set_config_namespace_keep, get_config_namespace_keep, clr_config_namespace_keep, },
209 { "lxc.namespace.share", set_config_namespace_share, get_config_namespace_share, clr_config_namespace_share, },
210 { "lxc.net.flags", set_config_net_flags, get_config_net_flags, clr_config_net_flags, },
211 { "lxc.net.hwaddr", set_config_net_hwaddr, get_config_net_hwaddr, clr_config_net_hwaddr, },
212 { "lxc.net.ipv4.address", set_config_net_ipv4_address, get_config_net_ipv4_address, clr_config_net_ipv4_address, },
213 { "lxc.net.ipv4.gateway", set_config_net_ipv4_gateway, get_config_net_ipv4_gateway, clr_config_net_ipv4_gateway, },
214 { "lxc.net.ipv6.address", set_config_net_ipv6_address, get_config_net_ipv6_address, clr_config_net_ipv6_address, },
215 { "lxc.net.ipv6.gateway", set_config_net_ipv6_gateway, get_config_net_ipv6_gateway, clr_config_net_ipv6_gateway, },
216 { "lxc.net.link", set_config_net_link, get_config_net_link, clr_config_net_link, },
217 { "lxc.net.macvlan.mode", set_config_net_macvlan_mode, get_config_net_macvlan_mode, clr_config_net_macvlan_mode, },
218 { "lxc.net.mtu", set_config_net_mtu, get_config_net_mtu, clr_config_net_mtu, },
219 { "lxc.net.name", set_config_net_name, get_config_net_name, clr_config_net_name, },
220 { "lxc.net.script.down", set_config_net_script_down, get_config_net_script_down, clr_config_net_script_down, },
221 { "lxc.net.script.up", set_config_net_script_up, get_config_net_script_up, clr_config_net_script_up, },
222 { "lxc.net.type", set_config_net_type, get_config_net_type, clr_config_net_type, },
223 { "lxc.net.vlan.id", set_config_net_vlan_id, get_config_net_vlan_id, clr_config_net_vlan_id, },
224 { "lxc.net.veth.pair", set_config_net_veth_pair, get_config_net_veth_pair, clr_config_net_veth_pair, },
225 { "lxc.net.", set_config_net_nic, get_config_net_nic, clr_config_net_nic, },
226 { "lxc.net", set_config_net, get_config_net, clr_config_net, },
227 { "lxc.no_new_privs", set_config_no_new_privs, get_config_no_new_privs, clr_config_no_new_privs, },
228 { "lxc.prlimit", set_config_prlimit, get_config_prlimit, clr_config_prlimit, },
229 { "lxc.pty.max", set_config_pty_max, get_config_pty_max, clr_config_pty_max, },
230 { "lxc.rootfs.managed", set_config_rootfs_managed, get_config_rootfs_managed, clr_config_rootfs_managed, },
231 { "lxc.rootfs.mount", set_config_rootfs_mount, get_config_rootfs_mount, clr_config_rootfs_mount, },
232 { "lxc.rootfs.options", set_config_rootfs_options, get_config_rootfs_options, clr_config_rootfs_options, },
233 { "lxc.rootfs.path", set_config_rootfs_path, get_config_rootfs_path, clr_config_rootfs_path, },
234 { "lxc.seccomp.profile", set_config_seccomp_profile, get_config_seccomp_profile, clr_config_seccomp_profile, },
235 { "lxc.selinux.context", set_config_selinux_context, get_config_selinux_context, clr_config_selinux_context, },
236 { "lxc.signal.halt", set_config_signal_halt, get_config_signal_halt, clr_config_signal_halt, },
237 { "lxc.signal.reboot", set_config_signal_reboot, get_config_signal_reboot, clr_config_signal_reboot, },
238 { "lxc.signal.stop", set_config_signal_stop, get_config_signal_stop, clr_config_signal_stop, },
239 { "lxc.start.auto", set_config_start, get_config_start, clr_config_start, },
240 { "lxc.start.delay", set_config_start, get_config_start, clr_config_start, },
241 { "lxc.start.order", set_config_start, get_config_start, clr_config_start, },
242 { "lxc.tty.dir", set_config_tty_dir, get_config_tty_dir, clr_config_tty_dir, },
243 { "lxc.tty.max", set_config_tty_max, get_config_tty_max, clr_config_tty_max, },
244 { "lxc.uts.name", set_config_uts_name, get_config_uts_name, clr_config_uts_name, },
245 { "lxc.sysctl", set_config_sysctl, get_config_sysctl, clr_config_sysctl, },
246 { "lxc.proc", set_config_proc, get_config_proc, clr_config_proc, },
247 };
248
249 static const size_t config_jump_table_size = sizeof(config_jump_table) / sizeof(struct lxc_config_t);
250
251 struct lxc_config_t *lxc_get_config(const char *key)
252 {
253 size_t i;
254
255 for (i = 0; i < config_jump_table_size; i++)
256 if (!strncmp(config_jump_table[i].name, key, strlen(config_jump_table[i].name)))
257 return &config_jump_table[i];
258
259 return NULL;
260 }
261
262 static int set_config_net(const char *key, const char *value,
263 struct lxc_conf *lxc_conf, void *data)
264 {
265 if (!lxc_config_value_empty(value)) {
266 ERROR("lxc.net must not have a value");
267 return -1;
268 }
269
270 return clr_config_net(key, lxc_conf, data);
271 }
272
273 static int set_config_net_type(const char *key, const char *value,
274 struct lxc_conf *lxc_conf, void *data)
275 {
276 struct lxc_netdev *netdev = data;
277
278 if (lxc_config_value_empty(value))
279 return clr_config_net_type(key, lxc_conf, data);
280
281 if (!netdev)
282 return -1;
283
284 if (!strcmp(value, "veth")) {
285 netdev->type = LXC_NET_VETH;
286 } else if (!strcmp(value, "macvlan")) {
287 netdev->type = LXC_NET_MACVLAN;
288 lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode,
289 "private");
290 } else if (!strcmp(value, "vlan")) {
291 netdev->type = LXC_NET_VLAN;
292 } else if (!strcmp(value, "phys")) {
293 netdev->type = LXC_NET_PHYS;
294 } else if (!strcmp(value, "empty")) {
295 netdev->type = LXC_NET_EMPTY;
296 } else if (!strcmp(value, "none")) {
297 netdev->type = LXC_NET_NONE;
298 } else {
299 ERROR("Invalid network type %s", value);
300 return -1;
301 }
302
303 return 0;
304 }
305
306 static int set_config_net_flags(const char *key, const char *value,
307 struct lxc_conf *lxc_conf, void *data)
308 {
309 struct lxc_netdev *netdev = data;
310
311 if (lxc_config_value_empty(value))
312 return clr_config_net_flags(key, lxc_conf, data);
313
314 if (!netdev)
315 return -1;
316
317 netdev->flags |= IFF_UP;
318
319 return 0;
320 }
321
322 static int create_matched_ifnames(const char *value, struct lxc_conf *lxc_conf,
323 struct lxc_netdev *netdev)
324 {
325 struct netns_ifaddrs *ifaddr, *ifa;
326 int n;
327 int ret = 0;
328 const char *type_key = "lxc.net.type";
329 const char *link_key = "lxc.net.link";
330 const char *tmpvalue = "phys";
331
332 if (netns_getifaddrs(&ifaddr, -1, &(bool){false}) < 0) {
333 SYSERROR("Failed to get network interfaces");
334 return -1;
335 }
336
337 for (ifa = ifaddr, n = 0; ifa != NULL; ifa = ifa->ifa_next, n++) {
338 if (!ifa->ifa_addr)
339 continue;
340
341 if (ifa->ifa_addr->sa_family != AF_PACKET)
342 continue;
343
344 if (!strncmp(value, ifa->ifa_name, strlen(value) - 1)) {
345 ret = set_config_net_type(type_key, tmpvalue, lxc_conf,
346 netdev);
347 if (!ret) {
348 ret = set_config_net_link(
349 link_key, ifa->ifa_name, lxc_conf, netdev);
350 if (ret) {
351 ERROR("Failed to create matched ifnames");
352 break;
353 }
354 } else {
355 ERROR("Failed to create matched ifnames");
356 break;
357 }
358 }
359 }
360
361 netns_freeifaddrs(ifaddr);
362 ifaddr = NULL;
363
364 return ret;
365 }
366
367 static int set_config_net_link(const char *key, const char *value,
368 struct lxc_conf *lxc_conf, void *data)
369 {
370 struct lxc_netdev *netdev = data;
371 int ret = 0;
372
373 if (lxc_config_value_empty(value))
374 return clr_config_net_link(key, lxc_conf, data);
375
376 if (!netdev)
377 return -1;
378
379 if (value[strlen(value) - 1] == '+' && netdev->type == LXC_NET_PHYS)
380 ret = create_matched_ifnames(value, lxc_conf, netdev);
381 else
382 ret = network_ifname(netdev->link, value, sizeof(netdev->link));
383
384 return ret;
385 }
386
387 static int set_config_net_name(const char *key, const char *value,
388 struct lxc_conf *lxc_conf, void *data)
389 {
390 struct lxc_netdev *netdev = data;
391
392 if (lxc_config_value_empty(value))
393 return clr_config_net_name(key, lxc_conf, data);
394
395 if (!netdev)
396 return -1;
397
398 return network_ifname(netdev->name, value, sizeof(netdev->name));
399 }
400
401 static int set_config_net_veth_pair(const char *key, const char *value,
402 struct lxc_conf *lxc_conf, void *data)
403 {
404 struct lxc_netdev *netdev = data;
405
406 if (lxc_config_value_empty(value))
407 return clr_config_net_veth_pair(key, lxc_conf, data);
408
409 if (!netdev)
410 return -1;
411
412 return network_ifname(netdev->priv.veth_attr.pair, value, sizeof(netdev->priv.veth_attr.pair));
413 }
414
415 static int set_config_net_macvlan_mode(const char *key, const char *value,
416 struct lxc_conf *lxc_conf, void *data)
417 {
418 struct lxc_netdev *netdev = data;
419
420 if (lxc_config_value_empty(value))
421 return clr_config_net_macvlan_mode(key, lxc_conf, data);
422
423 if (!netdev)
424 return -1;
425
426 return lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode, value);
427 }
428
429 static int set_config_net_hwaddr(const char *key, const char *value,
430 struct lxc_conf *lxc_conf, void *data)
431 {
432 struct lxc_netdev *netdev = data;
433 char *new_value;
434
435 if (lxc_config_value_empty(value))
436 return clr_config_net_hwaddr(key, lxc_conf, data);
437
438 if (!netdev)
439 return -1;
440
441 new_value = strdup(value);
442 if (!new_value)
443 return -1;
444
445 rand_complete_hwaddr(new_value);
446
447 if (lxc_config_value_empty(new_value)) {
448 free(new_value);
449 netdev->hwaddr = NULL;
450 return 0;
451 }
452
453 netdev->hwaddr = new_value;
454
455 return 0;
456 }
457
458 static int set_config_net_vlan_id(const char *key, const char *value,
459 struct lxc_conf *lxc_conf, void *data)
460 {
461 int ret;
462 struct lxc_netdev *netdev = data;
463
464 if (lxc_config_value_empty(value))
465 return clr_config_net_vlan_id(key, lxc_conf, data);
466
467 if (!netdev)
468 return -1;
469
470 ret = get_u16(&netdev->priv.vlan_attr.vid, value, 0);
471 if (ret < 0)
472 return -1;
473
474 return 0;
475 }
476
477 static int set_config_net_mtu(const char *key, const char *value,
478 struct lxc_conf *lxc_conf, void *data)
479 {
480 struct lxc_netdev *netdev = data;
481
482 if (lxc_config_value_empty(value))
483 return clr_config_net_mtu(key, lxc_conf, data);
484
485 if (!netdev)
486 return -1;
487
488 return set_config_string_item(&netdev->mtu, value);
489 }
490
491 static int set_config_net_ipv4_address(const char *key, const char *value,
492 struct lxc_conf *lxc_conf, void *data)
493 {
494 int ret;
495 struct lxc_netdev *netdev = data;
496 struct lxc_inetdev *inetdev;
497 struct lxc_list *list;
498 char *cursor, *slash;
499 char *addr = NULL, *bcast = NULL, *prefix = NULL;
500
501 if (lxc_config_value_empty(value))
502 return clr_config_net_ipv4_address(key, lxc_conf, data);
503
504 if (!netdev)
505 return -1;
506
507 inetdev = malloc(sizeof(*inetdev));
508 if (!inetdev)
509 return -1;
510 memset(inetdev, 0, sizeof(*inetdev));
511
512 list = malloc(sizeof(*list));
513 if (!list) {
514 free(inetdev);
515 return -1;
516 }
517
518 lxc_list_init(list);
519 list->elem = inetdev;
520
521 addr = strdup(value);
522 if (!addr) {
523 free(inetdev);
524 free(list);
525 return -1;
526 }
527
528 cursor = strstr(addr, " ");
529 if (cursor) {
530 *cursor = '\0';
531 bcast = cursor + 1;
532 }
533
534 slash = strstr(addr, "/");
535 if (slash) {
536 *slash = '\0';
537 prefix = slash + 1;
538 }
539
540 ret = inet_pton(AF_INET, addr, &inetdev->addr);
541 if (!ret || ret < 0) {
542 SYSERROR("Invalid ipv4 address \"%s\"", value);
543 free(inetdev);
544 free(addr);
545 free(list);
546 return -1;
547 }
548
549 if (bcast) {
550 ret = inet_pton(AF_INET, bcast, &inetdev->bcast);
551 if (!ret || ret < 0) {
552 SYSERROR("Invalid ipv4 broadcast address \"%s\"", value);
553 free(inetdev);
554 free(list);
555 free(addr);
556 return -1;
557 }
558
559 }
560
561 /* No prefix specified, determine it from the network class. */
562 if (prefix) {
563 ret = lxc_safe_uint(prefix, &inetdev->prefix);
564 if (ret < 0) {
565 free(inetdev);
566 free(list);
567 free(addr);
568 return -1;
569 }
570 } else {
571 inetdev->prefix = config_ip_prefix(&inetdev->addr);
572 }
573
574 /* If no broadcast address, let compute one from the
575 * prefix and address.
576 */
577 if (!bcast) {
578 inetdev->bcast.s_addr = inetdev->addr.s_addr;
579 inetdev->bcast.s_addr |= htonl(INADDR_BROADCAST >> inetdev->prefix);
580 }
581
582 lxc_list_add_tail(&netdev->ipv4, list);
583 free(addr);
584
585 return 0;
586 }
587
588 static int set_config_net_ipv4_gateway(const char *key, const char *value,
589 struct lxc_conf *lxc_conf, void *data)
590 {
591 struct lxc_netdev *netdev = data;
592
593 if (lxc_config_value_empty(value))
594 return clr_config_net_ipv4_gateway(key, lxc_conf, data);
595
596 if (!netdev)
597 return -1;
598
599 free(netdev->ipv4_gateway);
600
601 if (!strcmp(value, "auto")) {
602 netdev->ipv4_gateway = NULL;
603 netdev->ipv4_gateway_auto = true;
604 } else {
605 int ret;
606 struct in_addr *gw;
607
608 gw = malloc(sizeof(*gw));
609 if (!gw)
610 return -1;
611
612 ret = inet_pton(AF_INET, value, gw);
613 if (!ret || ret < 0) {
614 SYSERROR("Invalid ipv4 gateway address \"%s\"", value);
615 free(gw);
616 return -1;
617 }
618
619 netdev->ipv4_gateway = gw;
620 netdev->ipv4_gateway_auto = false;
621 }
622
623 return 0;
624 }
625
626 static int set_config_net_ipv6_address(const char *key, const char *value,
627 struct lxc_conf *lxc_conf, void *data)
628 {
629 int ret;
630 struct lxc_netdev *netdev = data;
631 struct lxc_inet6dev *inet6dev;
632 struct lxc_list *list;
633 char *slash, *valdup, *netmask;
634
635 if (lxc_config_value_empty(value))
636 return clr_config_net_ipv6_address(key, lxc_conf, data);
637
638 if (!netdev)
639 return -1;
640
641 inet6dev = malloc(sizeof(*inet6dev));
642 if (!inet6dev)
643 return -1;
644 memset(inet6dev, 0, sizeof(*inet6dev));
645
646 list = malloc(sizeof(*list));
647 if (!list) {
648 free(inet6dev);
649 return -1;
650 }
651
652 lxc_list_init(list);
653 list->elem = inet6dev;
654
655 valdup = strdup(value);
656 if (!valdup) {
657 free(list);
658 free(inet6dev);
659 return -1;
660 }
661
662 inet6dev->prefix = 64;
663 slash = strstr(valdup, "/");
664 if (slash) {
665 *slash = '\0';
666 netmask = slash + 1;
667
668 ret = lxc_safe_uint(netmask, &inet6dev->prefix);
669 if (ret < 0) {
670 free(list);
671 free(inet6dev);
672 free(valdup);
673 return -1;
674 }
675 }
676
677 ret = inet_pton(AF_INET6, valdup, &inet6dev->addr);
678 if (!ret || ret < 0) {
679 SYSERROR("Invalid ipv6 address \"%s\"", valdup);
680 free(list);
681 free(inet6dev);
682 free(valdup);
683 return -1;
684 }
685
686 lxc_list_add_tail(&netdev->ipv6, list);
687 free(valdup);
688
689 return 0;
690 }
691
692 static int set_config_net_ipv6_gateway(const char *key, const char *value,
693 struct lxc_conf *lxc_conf, void *data)
694 {
695 struct lxc_netdev *netdev = data;
696
697 if (lxc_config_value_empty(value))
698 return clr_config_net_ipv6_gateway(key, lxc_conf, data);
699
700 if (!netdev)
701 return -1;
702
703 free(netdev->ipv6_gateway);
704
705 if (!strcmp(value, "auto")) {
706 netdev->ipv6_gateway = NULL;
707 netdev->ipv6_gateway_auto = true;
708 } else {
709 int ret;
710 struct in6_addr *gw;
711
712 gw = malloc(sizeof(*gw));
713 if (!gw)
714 return -1;
715
716 ret = inet_pton(AF_INET6, value, gw);
717 if (!ret || ret < 0) {
718 SYSERROR("Invalid ipv6 gateway address \"%s\"", value);
719 free(gw);
720 return -1;
721 }
722
723 netdev->ipv6_gateway = gw;
724 netdev->ipv6_gateway_auto = false;
725 }
726
727 return 0;
728 }
729
730 static int set_config_net_script_up(const char *key, const char *value,
731 struct lxc_conf *lxc_conf, void *data)
732 {
733 struct lxc_netdev *netdev = data;
734
735 if (lxc_config_value_empty(value))
736 return clr_config_net_script_up(key, lxc_conf, data);
737
738 if (!netdev)
739 return -1;
740
741 return set_config_string_item(&netdev->upscript, value);
742 }
743
744 static int set_config_net_script_down(const char *key, const char *value,
745 struct lxc_conf *lxc_conf, void *data)
746 {
747 struct lxc_netdev *netdev = data;
748
749 if (lxc_config_value_empty(value))
750 return clr_config_net_script_down(key, lxc_conf, data);
751
752 if (!netdev)
753 return -1;
754
755 return set_config_string_item(&netdev->downscript, value);
756 }
757
758 static int add_hook(struct lxc_conf *lxc_conf, int which, char *hook)
759 {
760 struct lxc_list *hooklist;
761
762 hooklist = malloc(sizeof(*hooklist));
763 if (!hooklist) {
764 free(hook);
765 return -1;
766 }
767
768 hooklist->elem = hook;
769 lxc_list_add_tail(&lxc_conf->hooks[which], hooklist);
770
771 return 0;
772 }
773
774 static int set_config_seccomp_profile(const char *key, const char *value,
775 struct lxc_conf *lxc_conf, void *data)
776 {
777 return set_config_path_item(&lxc_conf->seccomp, value);
778 }
779
780 static int set_config_execute_cmd(const char *key, const char *value,
781 struct lxc_conf *lxc_conf, void *data)
782 {
783 return set_config_path_item(&lxc_conf->execute_cmd, value);
784 }
785
786 static int set_config_init_cmd(const char *key, const char *value,
787 struct lxc_conf *lxc_conf, void *data)
788 {
789 return set_config_path_item(&lxc_conf->init_cmd, value);
790 }
791
792 static int set_config_init_cwd(const char *key, const char *value,
793 struct lxc_conf *lxc_conf, void *data)
794 {
795 return set_config_path_item(&lxc_conf->init_cwd, value);
796 }
797
798 static int set_config_init_uid(const char *key, const char *value,
799 struct lxc_conf *lxc_conf, void *data)
800 {
801 unsigned int init_uid;
802
803 if (lxc_config_value_empty(value)) {
804 lxc_conf->init_uid = 0;
805 return 0;
806 }
807
808 if (lxc_safe_uint(value, &init_uid) < 0)
809 return -1;
810
811 lxc_conf->init_uid = init_uid;
812
813 return 0;
814 }
815
816 static int set_config_init_gid(const char *key, const char *value,
817 struct lxc_conf *lxc_conf, void *data)
818 {
819 unsigned int init_gid;
820
821 if (lxc_config_value_empty(value)) {
822 lxc_conf->init_gid = 0;
823 return 0;
824 }
825
826 if (lxc_safe_uint(value, &init_gid) < 0)
827 return -1;
828
829 lxc_conf->init_gid = init_gid;
830
831 return 0;
832 }
833
834 static int set_config_hooks(const char *key, const char *value,
835 struct lxc_conf *lxc_conf, void *data)
836 {
837 char *copy;
838
839 if (lxc_config_value_empty(value))
840 return lxc_clear_hooks(lxc_conf, key);
841
842 if (strcmp(key + 4, "hook") == 0) {
843 ERROR("lxc.hook must not have a value");
844 return -1;
845 }
846
847 copy = strdup(value);
848 if (!copy)
849 return -1;
850
851 if (strcmp(key + 9, "pre-start") == 0)
852 return add_hook(lxc_conf, LXCHOOK_PRESTART, copy);
853 else if (strcmp(key + 9, "start-host") == 0)
854 return add_hook(lxc_conf, LXCHOOK_START_HOST, copy);
855 else if (strcmp(key + 9, "pre-mount") == 0)
856 return add_hook(lxc_conf, LXCHOOK_PREMOUNT, copy);
857 else if (strcmp(key + 9, "autodev") == 0)
858 return add_hook(lxc_conf, LXCHOOK_AUTODEV, copy);
859 else if (strcmp(key + 9, "mount") == 0)
860 return add_hook(lxc_conf, LXCHOOK_MOUNT, copy);
861 else if (strcmp(key + 9, "start") == 0)
862 return add_hook(lxc_conf, LXCHOOK_START, copy);
863 else if (strcmp(key + 9, "stop") == 0)
864 return add_hook(lxc_conf, LXCHOOK_STOP, copy);
865 else if (strcmp(key + 9, "post-stop") == 0)
866 return add_hook(lxc_conf, LXCHOOK_POSTSTOP, copy);
867 else if (strcmp(key + 9, "clone") == 0)
868 return add_hook(lxc_conf, LXCHOOK_CLONE, copy);
869 else if (strcmp(key + 9, "destroy") == 0)
870 return add_hook(lxc_conf, LXCHOOK_DESTROY, copy);
871
872 free(copy);
873
874 return -1;
875 }
876
877 static int set_config_hooks_version(const char *key, const char *value,
878 struct lxc_conf *lxc_conf, void *data)
879 {
880 int ret;
881 unsigned int tmp;
882
883 if (lxc_config_value_empty(value))
884 return clr_config_hooks_version(key, lxc_conf, NULL);
885
886 ret = lxc_safe_uint(value, &tmp);
887 if (ret < 0)
888 return -1;
889
890 if (tmp > 1) {
891 ERROR("Invalid hook version specified. Currently only 0 "
892 "(legacy) and 1 are supported");
893 return -1;
894 }
895
896 lxc_conf->hooks_version = tmp;
897
898 return 0;
899 }
900
901 static int set_config_personality(const char *key, const char *value,
902 struct lxc_conf *lxc_conf, void *data)
903 {
904 signed long personality = lxc_config_parse_arch(value);
905
906 if (personality >= 0)
907 lxc_conf->personality = personality;
908 else
909 WARN("Unsupported personality \"%s\"", value);
910
911 return 0;
912 }
913
914 static int set_config_pty_max(const char *key, const char *value,
915 struct lxc_conf *lxc_conf, void *data)
916 {
917 int ret;
918 unsigned int max = 0;
919
920 if (lxc_config_value_empty(value)) {
921 lxc_conf->pty_max = 0;
922 return 0;
923 }
924
925 ret = lxc_safe_uint(value, &max);
926 if (ret < 0)
927 return -1;
928
929 lxc_conf->pty_max = max;
930
931 return 0;
932 }
933
934 /* We only need to check whether the first byte of the key after the lxc.start.
935 * prefix matches our expectations since they fortunately all start with a
936 * different letter. If anything was wrong with the key we would have already
937 * noticed when the callback was called.
938 */
939 static int set_config_start(const char *key, const char *value,
940 struct lxc_conf *lxc_conf, void *data)
941 {
942 bool is_empty;
943
944 is_empty = lxc_config_value_empty(value);
945
946 if (*(key + 10) == 'a') { /* lxc.start.auto */
947 if (is_empty) {
948 lxc_conf->start_auto = 0;
949 return 0;
950 }
951
952 if (lxc_safe_uint(value, &lxc_conf->start_auto) < 0)
953 return -1;
954
955 if (lxc_conf->start_auto > 1)
956 return -1;
957
958 return 0;
959 } else if (*(key + 10) == 'd') { /* lxc.start.delay */
960 if (is_empty) {
961 lxc_conf->start_delay = 0;
962 return 0;
963 }
964
965 return lxc_safe_uint(value, &lxc_conf->start_delay);
966 } else if (*(key + 10) == 'o') { /* lxc.start.order */
967 if (is_empty) {
968 lxc_conf->start_order = 0;
969 return 0;
970 }
971
972 return lxc_safe_int(value, &lxc_conf->start_order);
973 }
974
975 return -1;
976 }
977
978 static int set_config_monitor(const char *key, const char *value,
979 struct lxc_conf *lxc_conf, void *data)
980 {
981 if (lxc_config_value_empty(value)) {
982 lxc_conf->monitor_unshare = 0;
983 return 0;
984 }
985
986 if (strcmp(key + 12, "unshare") == 0)
987 return lxc_safe_uint(value, &lxc_conf->monitor_unshare);
988
989 return -1;
990 }
991
992 static int set_config_monitor_signal_pdeath(const char *key, const char *value,
993 struct lxc_conf *lxc_conf, void *data)
994 {
995 if (lxc_config_value_empty(value)) {
996 lxc_conf->monitor_signal_pdeath = 0;
997 return 0;
998 }
999
1000 if (strcmp(key + 12, "signal.pdeath") == 0) {
1001 int sig_n;
1002
1003 sig_n = sig_parse(value);
1004 if (sig_n < 0)
1005 return -1;
1006
1007 lxc_conf->monitor_signal_pdeath = sig_n;
1008 return 0;
1009 }
1010
1011 return -EINVAL;
1012 }
1013
1014 static int set_config_group(const char *key, const char *value,
1015 struct lxc_conf *lxc_conf, void *data)
1016 {
1017 char *groups, *token;
1018 struct lxc_list *grouplist;
1019 int ret = 0;
1020
1021 if (lxc_config_value_empty(value))
1022 return lxc_clear_groups(lxc_conf);
1023
1024 groups = strdup(value);
1025 if (!groups)
1026 return -1;
1027
1028 /* In case several groups are specified in a single line split these
1029 * groups in a single element for the list.
1030 */
1031 lxc_iterate_parts(token, groups, " \t") {
1032 grouplist = malloc(sizeof(*grouplist));
1033 if (!grouplist) {
1034 ret = -1;
1035 break;
1036 }
1037
1038 grouplist->elem = strdup(token);
1039 if (!grouplist->elem) {
1040 free(grouplist);
1041 ret = -1;
1042 break;
1043 }
1044
1045 lxc_list_add_tail(&lxc_conf->groups, grouplist);
1046 }
1047
1048 free(groups);
1049
1050 return ret;
1051 }
1052
1053 static int set_config_environment(const char *key, const char *value,
1054 struct lxc_conf *lxc_conf, void *data)
1055 {
1056 struct lxc_list *list_item = NULL;
1057
1058 if (lxc_config_value_empty(value))
1059 return lxc_clear_environment(lxc_conf);
1060
1061 list_item = malloc(sizeof(*list_item));
1062 if (!list_item)
1063 goto on_error;
1064
1065 if (!strchr(value, '=')) {
1066 const char *env_val;
1067 const char *env_key = value;
1068 const char *env_var[3] = {0};
1069
1070 env_val = getenv(env_key);
1071 if (!env_val)
1072 goto on_error;
1073
1074 env_var[0] = env_key;
1075 env_var[1] = env_val;
1076 list_item->elem = lxc_string_join("=", env_var, false);
1077 } else {
1078 list_item->elem = strdup(value);
1079 }
1080
1081 if (!list_item->elem)
1082 goto on_error;
1083
1084 lxc_list_add_tail(&lxc_conf->environment, list_item);
1085
1086 return 0;
1087
1088 on_error:
1089 free(list_item);
1090
1091 return -1;
1092 }
1093
1094 static int set_config_tty_max(const char *key, const char *value,
1095 struct lxc_conf *lxc_conf, void *data)
1096 {
1097 int ret;
1098 unsigned int nbtty = 0;
1099
1100 if (lxc_config_value_empty(value)) {
1101 lxc_conf->ttys.max = 0;
1102 return 0;
1103 }
1104
1105 ret = lxc_safe_uint(value, &nbtty);
1106 if (ret < 0)
1107 return -1;
1108
1109 lxc_conf->ttys.max = nbtty;
1110
1111 return 0;
1112 }
1113
1114 static int set_config_tty_dir(const char *key, const char *value,
1115 struct lxc_conf *lxc_conf, void *data)
1116 {
1117 return set_config_string_item_max(&lxc_conf->ttys.dir, value,
1118 NAME_MAX + 1);
1119 }
1120
1121 static int set_config_apparmor_profile(const char *key, const char *value,
1122 struct lxc_conf *lxc_conf, void *data)
1123 {
1124 return set_config_string_item(&lxc_conf->lsm_aa_profile, value);
1125 }
1126
1127 static int set_config_apparmor_allow_incomplete(const char *key,
1128 const char *value,
1129 struct lxc_conf *lxc_conf,
1130 void *data)
1131 {
1132 if (lxc_config_value_empty(value)) {
1133 lxc_conf->lsm_aa_allow_incomplete = 0;
1134 return 0;
1135 }
1136
1137 if (lxc_safe_uint(value, &lxc_conf->lsm_aa_allow_incomplete) < 0)
1138 return -1;
1139
1140 if (lxc_conf->lsm_aa_allow_incomplete > 1)
1141 return -1;
1142
1143 return 0;
1144 }
1145
1146 static int set_config_apparmor_allow_nesting(const char *key,
1147 const char *value,
1148 struct lxc_conf *lxc_conf,
1149 void *data)
1150 {
1151 if (lxc_config_value_empty(value))
1152 return clr_config_apparmor_allow_nesting(key, lxc_conf, NULL);
1153
1154 if (lxc_safe_uint(value, &lxc_conf->lsm_aa_allow_nesting) < 0)
1155 return -1;
1156
1157 if (lxc_conf->lsm_aa_allow_nesting > 1)
1158 return -1;
1159
1160 return 0;
1161 }
1162
1163 static int set_config_apparmor_raw(const char *key,
1164 const char *value,
1165 struct lxc_conf *lxc_conf,
1166 void *data)
1167 {
1168 char *elem;
1169 struct lxc_list *list;
1170
1171 if (lxc_config_value_empty(value))
1172 return lxc_clear_apparmor_raw(lxc_conf);
1173
1174 list = malloc(sizeof(*list));
1175 if (!list) {
1176 errno = ENOMEM;
1177 return -1;
1178 }
1179
1180 elem = strdup(value);
1181 if (!elem) {
1182 free(list);
1183 return -1;
1184 }
1185 list->elem = elem;
1186
1187 lxc_list_add_tail(&lxc_conf->lsm_aa_raw, list);
1188
1189 return 0;
1190 }
1191
1192 static int set_config_selinux_context(const char *key, const char *value,
1193 struct lxc_conf *lxc_conf, void *data)
1194 {
1195 return set_config_string_item(&lxc_conf->lsm_se_context, value);
1196 }
1197
1198 static int set_config_log_file(const char *key, const char *value,
1199 struct lxc_conf *c, void *data)
1200 {
1201 int ret;
1202
1203 if (lxc_config_value_empty(value)) {
1204 free(c->logfile);
1205 c->logfile = NULL;
1206 return 0;
1207 }
1208
1209 /* Store these values in the lxc_conf, and then try to set for actual
1210 * current logging.
1211 */
1212 ret = set_config_path_item(&c->logfile, value);
1213 if (ret == 0)
1214 ret = lxc_log_set_file(&c->logfd, c->logfile);
1215
1216 return ret;
1217 }
1218
1219 static int set_config_log_level(const char *key, const char *value,
1220 struct lxc_conf *lxc_conf, void *data)
1221 {
1222 int newlevel;
1223
1224 if (lxc_config_value_empty(value)) {
1225 lxc_conf->loglevel = LXC_LOG_LEVEL_NOTSET;
1226 return 0;
1227 }
1228
1229 if (value[0] >= '0' && value[0] <= '9') {
1230 if (lxc_safe_int(value, &newlevel) < 0)
1231 return -1;
1232 } else {
1233 newlevel = lxc_log_priority_to_int(value);
1234 }
1235
1236 /* Store these values in the lxc_conf, and then try to set for actual
1237 * current logging.
1238 */
1239 lxc_conf->loglevel = newlevel;
1240
1241 return lxc_log_set_level(&lxc_conf->loglevel, newlevel);
1242 }
1243
1244 static int set_config_autodev(const char *key, const char *value,
1245 struct lxc_conf *lxc_conf, void *data)
1246 {
1247 if (lxc_config_value_empty(value)) {
1248 lxc_conf->autodev = 0;
1249 return 0;
1250 }
1251
1252 if (lxc_safe_uint(value, &lxc_conf->autodev) < 0)
1253 return -1;
1254
1255 if (lxc_conf->autodev > 1)
1256 return -1;
1257
1258 return 0;
1259 }
1260
1261 static int set_config_signal_halt(const char *key, const char *value,
1262 struct lxc_conf *lxc_conf, void *data)
1263 {
1264 int sig_n;
1265
1266 if (lxc_config_value_empty(value)) {
1267 lxc_conf->haltsignal = 0;
1268 return 0;
1269 }
1270
1271 sig_n = sig_parse(value);
1272 if (sig_n < 0)
1273 return -1;
1274
1275 lxc_conf->haltsignal = sig_n;
1276
1277 return 0;
1278 }
1279
1280 static int set_config_signal_reboot(const char *key, const char *value,
1281 struct lxc_conf *lxc_conf, void *data)
1282 {
1283 int sig_n;
1284
1285 if (lxc_config_value_empty(value)) {
1286 lxc_conf->rebootsignal = 0;
1287 return 0;
1288 }
1289
1290 sig_n = sig_parse(value);
1291 if (sig_n < 0)
1292 return -1;
1293
1294 lxc_conf->rebootsignal = sig_n;
1295
1296 return 0;
1297 }
1298
1299 static int set_config_signal_stop(const char *key, const char *value,
1300 struct lxc_conf *lxc_conf, void *data)
1301 {
1302 int sig_n;
1303
1304 if (lxc_config_value_empty(value)) {
1305 lxc_conf->stopsignal = 0;
1306 return 0;
1307 }
1308
1309 sig_n = sig_parse(value);
1310 if (sig_n < 0)
1311 return -1;
1312
1313 lxc_conf->stopsignal = sig_n;
1314
1315 return 0;
1316 }
1317
1318 static int __set_config_cgroup_controller(const char *key, const char *value,
1319 struct lxc_conf *lxc_conf, int version)
1320 {
1321 const char *subkey, *token;
1322 size_t token_len;
1323 struct lxc_list *cglist = NULL;
1324 struct lxc_cgroup *cgelem = NULL;
1325
1326 if (lxc_config_value_empty(value))
1327 return lxc_clear_cgroups(lxc_conf, key, version);
1328
1329 if (version == CGROUP2_SUPER_MAGIC) {
1330 token = "lxc.cgroup2.";
1331 token_len = 12;
1332 } else if (version == CGROUP_SUPER_MAGIC) {
1333 token = "lxc.cgroup.";
1334 token_len = 11;
1335 } else {
1336 return -EINVAL;
1337 }
1338
1339 if (strncmp(key, token, token_len) != 0)
1340 return -EINVAL;
1341
1342 subkey = key + token_len;
1343 if (*subkey == '\0')
1344 return -EINVAL;
1345
1346 cglist = malloc(sizeof(*cglist));
1347 if (!cglist)
1348 goto out;
1349
1350 cgelem = malloc(sizeof(*cgelem));
1351 if (!cgelem)
1352 goto out;
1353 memset(cgelem, 0, sizeof(*cgelem));
1354
1355 cgelem->subsystem = strdup(subkey);
1356 if (!cgelem->subsystem)
1357 goto out;
1358
1359 cgelem->value = strdup(value);
1360 if (!cgelem->value)
1361 goto out;
1362
1363 cgelem->version = version;
1364
1365 lxc_list_add_elem(cglist, cgelem);
1366
1367 if (version == CGROUP2_SUPER_MAGIC)
1368 lxc_list_add_tail(&lxc_conf->cgroup2, cglist);
1369 else
1370 lxc_list_add_tail(&lxc_conf->cgroup, cglist);
1371
1372 return 0;
1373
1374 out:
1375 free(cglist);
1376 if (cgelem) {
1377 free(cgelem->subsystem);
1378 free(cgelem->value);
1379 free(cgelem);
1380 }
1381
1382 return -1;
1383 }
1384
1385 static int set_config_cgroup_controller(const char *key, const char *value,
1386 struct lxc_conf *lxc_conf, void *data)
1387 {
1388 return __set_config_cgroup_controller(key, value, lxc_conf,
1389 CGROUP_SUPER_MAGIC);
1390 }
1391
1392 static int set_config_cgroup2_controller(const char *key, const char *value,
1393 struct lxc_conf *lxc_conf, void *data)
1394 {
1395 return __set_config_cgroup_controller(key, value, lxc_conf,
1396 CGROUP2_SUPER_MAGIC);
1397 }
1398
1399
1400 static int set_config_cgroup_dir(const char *key, const char *value,
1401 struct lxc_conf *lxc_conf, void *data)
1402 {
1403 if (lxc_config_value_empty(value))
1404 return clr_config_cgroup_dir(key, lxc_conf, NULL);
1405
1406 return set_config_string_item(&lxc_conf->cgroup_meta.dir, value);
1407 }
1408
1409 static int set_config_cgroup_relative(const char *key, const char *value,
1410 struct lxc_conf *lxc_conf, void *data)
1411 {
1412 unsigned int converted;
1413 int ret;
1414
1415 if (lxc_config_value_empty(value))
1416 return clr_config_cgroup_relative(key, lxc_conf, NULL);
1417
1418 ret = lxc_safe_uint(value, &converted);
1419 if (ret < 0)
1420 return -ret;
1421
1422 if (converted == 1) {
1423 lxc_conf->cgroup_meta.relative = true;
1424 return 0;
1425 }
1426
1427 if (converted == 0) {
1428 lxc_conf->cgroup_meta.relative = false;
1429 return 0;
1430 }
1431
1432 return -EINVAL;
1433 }
1434
1435 static int set_config_prlimit(const char *key, const char *value,
1436 struct lxc_conf *lxc_conf, void *data)
1437 {
1438 struct lxc_list *iter;
1439 struct rlimit limit;
1440 rlim_t limit_value;
1441 struct lxc_list *limlist = NULL;
1442 struct lxc_limit *limelem = NULL;
1443
1444 if (lxc_config_value_empty(value))
1445 return lxc_clear_limits(lxc_conf, key);
1446
1447 if (strncmp(key, "lxc.prlimit.", STRLITERALLEN("lxc.prlimit.")) != 0)
1448 return -1;
1449
1450 key += STRLITERALLEN("lxc.prlimit.");
1451
1452 /* soft limit comes first in the value */
1453 if (!parse_limit_value(&value, &limit_value))
1454 return -1;
1455
1456 limit.rlim_cur = limit_value;
1457
1458 /* skip spaces and a colon */
1459 while (isspace(*value))
1460 ++value;
1461
1462 if (*value == ':')
1463 ++value;
1464 else if (*value) /* any other character is an error here */
1465 return -1;
1466
1467 while (isspace(*value))
1468 ++value;
1469
1470 /* optional hard limit */
1471 if (*value) {
1472 if (!parse_limit_value(&value, &limit_value))
1473 return -1;
1474
1475 limit.rlim_max = limit_value;
1476
1477 /* check for trailing garbage */
1478 while (isspace(*value))
1479 ++value;
1480
1481 if (*value)
1482 return -1;
1483 } else {
1484 /* a single value sets both hard and soft limit */
1485 limit.rlim_max = limit.rlim_cur;
1486 }
1487
1488 /* find existing list element */
1489 lxc_list_for_each(iter, &lxc_conf->limits) {
1490 limelem = iter->elem;
1491 if (!strcmp(key, limelem->resource)) {
1492 limelem->limit = limit;
1493 return 0;
1494 }
1495 }
1496
1497 /* allocate list element */
1498 limlist = malloc(sizeof(*limlist));
1499 if (!limlist)
1500 goto on_error;
1501
1502 limelem = malloc(sizeof(*limelem));
1503 if (!limelem)
1504 goto on_error;
1505 memset(limelem, 0, sizeof(*limelem));
1506
1507 limelem->resource = strdup(key);
1508 if (!limelem->resource)
1509 goto on_error;
1510
1511 limelem->limit = limit;
1512 lxc_list_add_elem(limlist, limelem);;
1513 lxc_list_add_tail(&lxc_conf->limits, limlist);
1514
1515 return 0;
1516
1517 on_error:
1518 free(limlist);
1519
1520 if (limelem) {
1521 free(limelem->resource);
1522 free(limelem);
1523 }
1524
1525 return -1;
1526 }
1527
1528 static int set_config_sysctl(const char *key, const char *value,
1529 struct lxc_conf *lxc_conf, void *data)
1530 {
1531 struct lxc_list *iter;
1532 char *replace_value = NULL;
1533 struct lxc_list *sysctl_list = NULL;
1534 struct lxc_sysctl *sysctl_elem = NULL;
1535
1536 if (lxc_config_value_empty(value))
1537 return clr_config_sysctl(key, lxc_conf, NULL);
1538
1539 if (strncmp(key, "lxc.sysctl.", STRLITERALLEN("lxc.sysctl.")) != 0)
1540 return -1;
1541
1542 key += STRLITERALLEN("lxc.sysctl.");
1543
1544 /* find existing list element */
1545 lxc_list_for_each(iter, &lxc_conf->sysctls) {
1546 sysctl_elem = iter->elem;
1547
1548 if (strcmp(key, sysctl_elem->key) != 0)
1549 continue;
1550
1551 replace_value = strdup(value);
1552 if (!replace_value)
1553 return -1;
1554
1555 free(sysctl_elem->value);
1556 sysctl_elem->value = replace_value;
1557
1558 return 0;
1559 }
1560
1561 /* allocate list element */
1562 sysctl_list = malloc(sizeof(*sysctl_list));
1563 if (!sysctl_list)
1564 goto on_error;
1565
1566 sysctl_elem = malloc(sizeof(*sysctl_elem));
1567 if (!sysctl_elem)
1568 goto on_error;
1569 memset(sysctl_elem, 0, sizeof(*sysctl_elem));
1570
1571 sysctl_elem->key = strdup(key);
1572 if (!sysctl_elem->key)
1573 goto on_error;
1574
1575 sysctl_elem->value = strdup(value);
1576 if (!sysctl_elem->value)
1577 goto on_error;
1578
1579 lxc_list_add_elem(sysctl_list, sysctl_elem);
1580 lxc_list_add_tail(&lxc_conf->sysctls, sysctl_list);
1581
1582 return 0;
1583
1584 on_error:
1585 free(sysctl_list);
1586
1587 if (sysctl_elem) {
1588 free(sysctl_elem->key);
1589 free(sysctl_elem->value);
1590 free(sysctl_elem);
1591 }
1592
1593 return -1;
1594 }
1595
1596 static int set_config_proc(const char *key, const char *value,
1597 struct lxc_conf *lxc_conf, void *data)
1598 {
1599 const char *subkey;
1600 struct lxc_list *proclist = NULL;
1601 struct lxc_proc *procelem = NULL;
1602
1603 if (lxc_config_value_empty(value))
1604 return clr_config_proc(key, lxc_conf, NULL);
1605
1606 if (strncmp(key, "lxc.proc.", STRLITERALLEN("lxc.proc.")) != 0)
1607 return -1;
1608
1609 subkey = key + STRLITERALLEN("lxc.proc.");
1610 if (*subkey == '\0')
1611 return -EINVAL;
1612
1613 proclist = malloc(sizeof(*proclist));
1614 if (!proclist)
1615 goto on_error;
1616
1617 procelem = malloc(sizeof(*procelem));
1618 if (!procelem)
1619 goto on_error;
1620 memset(procelem, 0, sizeof(*procelem));
1621
1622 procelem->filename = strdup(subkey);
1623 procelem->value = strdup(value);
1624
1625 if (!procelem->filename || !procelem->value)
1626 goto on_error;
1627
1628 proclist->elem = procelem;
1629
1630 lxc_list_add_tail(&lxc_conf->procs, proclist);
1631
1632 return 0;
1633
1634 on_error:
1635 free(proclist);
1636
1637 if (procelem) {
1638 free(procelem->filename);
1639 free(procelem->value);
1640 free(procelem);
1641 }
1642
1643 return -1;
1644 }
1645
1646 static int set_config_idmaps(const char *key, const char *value,
1647 struct lxc_conf *lxc_conf, void *data)
1648 {
1649 unsigned long hostid, nsid, range;
1650 char type;
1651 int ret;
1652 struct lxc_list *idmaplist = NULL;
1653 struct id_map *idmap = NULL;
1654
1655 if (lxc_config_value_empty(value))
1656 return lxc_clear_idmaps(lxc_conf);
1657
1658 idmaplist = malloc(sizeof(*idmaplist));
1659 if (!idmaplist)
1660 goto on_error;
1661
1662 idmap = malloc(sizeof(*idmap));
1663 if (!idmap)
1664 goto on_error;
1665 memset(idmap, 0, sizeof(*idmap));
1666
1667 ret = parse_idmaps(value, &type, &nsid, &hostid, &range);
1668 if (ret < 0) {
1669 ERROR("Failed to parse id mappings");
1670 goto on_error;
1671 }
1672
1673 INFO("Read uid map: type %c nsid %lu hostid %lu range %lu", type, nsid, hostid, range);
1674 if (type == 'u')
1675 idmap->idtype = ID_TYPE_UID;
1676 else if (type == 'g')
1677 idmap->idtype = ID_TYPE_GID;
1678 else
1679 goto on_error;
1680
1681 idmap->hostid = hostid;
1682 idmap->nsid = nsid;
1683 idmap->range = range;
1684 idmaplist->elem = idmap;
1685 lxc_list_add_tail(&lxc_conf->id_map, idmaplist);
1686
1687 if (!lxc_conf->root_nsuid_map && idmap->idtype == ID_TYPE_UID)
1688 if (idmap->nsid == 0)
1689 lxc_conf->root_nsuid_map = idmap;
1690
1691 if (!lxc_conf->root_nsgid_map && idmap->idtype == ID_TYPE_GID)
1692 if (idmap->nsid == 0)
1693 lxc_conf->root_nsgid_map = idmap;
1694
1695 idmap = NULL;
1696
1697 return 0;
1698
1699 on_error:
1700 free(idmaplist);
1701 free(idmap);
1702
1703 return -1;
1704 }
1705
1706 static int set_config_mount_fstab(const char *key, const char *value,
1707 struct lxc_conf *lxc_conf, void *data)
1708 {
1709 if (lxc_config_value_empty(value)) {
1710 clr_config_mount_fstab(key, lxc_conf, NULL);
1711 return -1;
1712 }
1713
1714 return set_config_path_item(&lxc_conf->fstab, value);
1715 }
1716
1717 static int set_config_mount_auto(const char *key, const char *value,
1718 struct lxc_conf *lxc_conf, void *data)
1719 {
1720 char *autos, *token;
1721 int i;
1722 int ret = -1;
1723 static struct {
1724 const char *token;
1725 int mask;
1726 int flag;
1727 } allowed_auto_mounts[] = {
1728 { "proc", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED },
1729 { "proc:mixed", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED },
1730 { "proc:rw", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_RW },
1731 { "sys", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED },
1732 { "sys:ro", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RO },
1733 { "sys:mixed", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED },
1734 { "sys:rw", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RW },
1735 { "cgroup", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC },
1736 { "cgroup:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED },
1737 { "cgroup:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO },
1738 { "cgroup:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW },
1739 { "cgroup:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC | LXC_AUTO_CGROUP_FORCE },
1740 { "cgroup:mixed:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED | LXC_AUTO_CGROUP_FORCE },
1741 { "cgroup:ro:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO | LXC_AUTO_CGROUP_FORCE },
1742 { "cgroup:rw:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW | LXC_AUTO_CGROUP_FORCE },
1743 { "cgroup-full", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_NOSPEC },
1744 { "cgroup-full:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_MIXED },
1745 { "cgroup-full:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RO },
1746 { "cgroup-full:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RW },
1747 { "cgroup-full:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_NOSPEC | LXC_AUTO_CGROUP_FORCE },
1748 { "cgroup-full:mixed:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_MIXED | LXC_AUTO_CGROUP_FORCE },
1749 { "cgroup-full:ro:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RO | LXC_AUTO_CGROUP_FORCE },
1750 { "cgroup-full:rw:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RW | LXC_AUTO_CGROUP_FORCE },
1751 { "shmounts:", LXC_AUTO_SHMOUNTS_MASK, LXC_AUTO_SHMOUNTS },
1752 /* For adding anything that is just a single on/off, but has no
1753 * options: keep mask and flag identical and just define the enum
1754 * value as an unused bit so far
1755 */
1756 { NULL, 0, 0 }
1757 };
1758
1759 if (lxc_config_value_empty(value)) {
1760 lxc_conf->auto_mounts = 0;
1761 return 0;
1762 }
1763
1764 autos = strdup(value);
1765 if (!autos)
1766 return -1;
1767
1768 lxc_iterate_parts(token, autos, " \t") {
1769 bool is_shmounts = false;
1770
1771 for (i = 0; allowed_auto_mounts[i].token; i++) {
1772 if (!strcmp(allowed_auto_mounts[i].token, token))
1773 break;
1774
1775 if (strcmp("shmounts:", allowed_auto_mounts[i].token) == 0 &&
1776 strncmp("shmounts:", token, STRLITERALLEN("shmounts:")) == 0) {
1777 is_shmounts = true;
1778 break;
1779 }
1780 }
1781
1782 if (!allowed_auto_mounts[i].token) {
1783 ERROR("Invalid filesystem to automount \"%s\"", token);
1784 goto on_error;
1785 }
1786
1787 lxc_conf->auto_mounts &= ~allowed_auto_mounts[i].mask;
1788 lxc_conf->auto_mounts |= allowed_auto_mounts[i].flag;
1789
1790 if (is_shmounts) {
1791 lxc_conf->shmount.path_host = strdup(token + STRLITERALLEN("shmounts:"));
1792 if (!lxc_conf->shmount.path_host) {
1793 SYSERROR("Failed to copy shmounts host path");
1794 goto on_error;
1795 }
1796
1797 if (strcmp(lxc_conf->shmount.path_host, "") == 0) {
1798 ERROR("Invalid shmounts path: empty");
1799 goto on_error;
1800 }
1801
1802 lxc_conf->shmount.path_cont = strdup("/dev/.lxc-mounts");
1803 if(!lxc_conf->shmount.path_cont) {
1804 SYSERROR("Failed to copy shmounts container path");
1805 goto on_error;
1806 }
1807 }
1808 }
1809
1810 ret = 0;
1811
1812 on_error:
1813 free(autos);
1814
1815 return ret;
1816 }
1817
1818 static int set_config_mount(const char *key, const char *value,
1819 struct lxc_conf *lxc_conf, void *data)
1820 {
1821 char *mntelem;
1822 struct lxc_list *mntlist;
1823
1824 if (lxc_config_value_empty(value))
1825 return lxc_clear_mount_entries(lxc_conf);
1826
1827 mntlist = malloc(sizeof(*mntlist));
1828 if (!mntlist)
1829 return -1;
1830
1831 mntelem = strdup(value);
1832 if (!mntelem) {
1833 free(mntlist);
1834 return -1;
1835 }
1836 mntlist->elem = mntelem;
1837
1838 lxc_list_add_tail(&lxc_conf->mount_list, mntlist);
1839
1840 return 0;
1841 }
1842
1843 int add_elem_to_mount_list(const char *value, struct lxc_conf *lxc_conf) {
1844 return set_config_mount(NULL, value, lxc_conf, NULL);
1845 }
1846
1847 static int set_config_cap_keep(const char *key, const char *value,
1848 struct lxc_conf *lxc_conf, void *data)
1849 {
1850 char *keepcaps, *token;
1851 struct lxc_list *keeplist;
1852 int ret = -1;
1853
1854 if (lxc_config_value_empty(value))
1855 return lxc_clear_config_keepcaps(lxc_conf);
1856
1857 keepcaps = strdup(value);
1858 if (!keepcaps)
1859 return -1;
1860
1861 /* In case several capability keep is specified in a single line
1862 * split these caps in a single element for the list.
1863 */
1864 lxc_iterate_parts(token, keepcaps, " \t") {
1865 if (!strcmp(token, "none"))
1866 lxc_clear_config_keepcaps(lxc_conf);
1867
1868 keeplist = malloc(sizeof(*keeplist));
1869 if (!keeplist)
1870 goto on_error;
1871
1872 keeplist->elem = strdup(token);
1873 if (!keeplist->elem) {
1874 free(keeplist);
1875 goto on_error;
1876 }
1877
1878 lxc_list_add_tail(&lxc_conf->keepcaps, keeplist);
1879 }
1880
1881 ret = 0;
1882
1883 on_error:
1884 free(keepcaps);
1885
1886 return ret;
1887 }
1888
1889 static int set_config_cap_drop(const char *key, const char *value,
1890 struct lxc_conf *lxc_conf, void *data)
1891 {
1892 char *dropcaps, *token;
1893 struct lxc_list *droplist;
1894 int ret = -1;
1895
1896 if (lxc_config_value_empty(value))
1897 return lxc_clear_config_caps(lxc_conf);
1898
1899 dropcaps = strdup(value);
1900 if (!dropcaps)
1901 return -1;
1902
1903 /* In case several capability drop is specified in a single line
1904 * split these caps in a single element for the list.
1905 */
1906 lxc_iterate_parts(token, dropcaps, " \t") {
1907 droplist = malloc(sizeof(*droplist));
1908 if (!droplist)
1909 goto on_error;
1910
1911 droplist->elem = strdup(token);
1912 if (!droplist->elem) {
1913 free(droplist);
1914 goto on_error;
1915 }
1916
1917 lxc_list_add_tail(&lxc_conf->caps, droplist);
1918 }
1919
1920 ret = 0;
1921
1922 on_error:
1923 free(dropcaps);
1924
1925 return ret;
1926 }
1927
1928 static int set_config_console_path(const char *key, const char *value,
1929 struct lxc_conf *lxc_conf, void *data)
1930 {
1931 return set_config_path_item(&lxc_conf->console.path, value);
1932 }
1933
1934 static int set_config_console_rotate(const char *key, const char *value,
1935 struct lxc_conf *lxc_conf, void *data)
1936 {
1937 if (lxc_config_value_empty(value)) {
1938 lxc_conf->console.log_rotate = 0;
1939 return 0;
1940 }
1941
1942 if (lxc_safe_uint(value, &lxc_conf->console.log_rotate) < 0)
1943 return -1;
1944
1945 if (lxc_conf->console.log_rotate > 1) {
1946 ERROR("The \"lxc.console.rotate\" config key can only be set "
1947 "to 0 or 1");
1948 return -1;
1949 }
1950
1951 return 0;
1952 }
1953
1954 static int set_config_console_logfile(const char *key, const char *value,
1955 struct lxc_conf *lxc_conf, void *data)
1956 {
1957 return set_config_path_item(&lxc_conf->console.log_path, value);
1958 }
1959
1960 static int set_config_console_buffer_size(const char *key, const char *value,
1961 struct lxc_conf *lxc_conf, void *data)
1962 {
1963 int ret;
1964 int64_t size;
1965 uint64_t buffer_size, pgsz;
1966
1967 if (lxc_config_value_empty(value)) {
1968 lxc_conf->console.buffer_size = 0;
1969 return 0;
1970 }
1971
1972 /* If the user specified "auto" the default log size is 2^17 = 128 Kib */
1973 if (!strcmp(value, "auto")) {
1974 lxc_conf->console.buffer_size = 1 << 17;
1975 return 0;
1976 }
1977
1978 ret = parse_byte_size_string(value, &size);
1979 if (ret < 0)
1980 return -1;
1981
1982 if (size < 0)
1983 return -EINVAL;
1984
1985 /* must be at least a page size */
1986 pgsz = lxc_getpagesize();
1987 if ((uint64_t)size < pgsz) {
1988 NOTICE("Requested ringbuffer size for the console is %" PRId64
1989 " but must be at least %" PRId64
1990 " bytes. Setting ringbuffer size to %" PRId64 " bytes",
1991 size, pgsz, pgsz);
1992 size = pgsz;
1993 }
1994
1995 buffer_size = lxc_find_next_power2((uint64_t)size);
1996 if (buffer_size == 0)
1997 return -EINVAL;
1998
1999 if (buffer_size != size)
2000 NOTICE("Passed size was not a power of 2. Rounding log size to "
2001 "next power of two: %" PRIu64 " bytes", buffer_size);
2002
2003 lxc_conf->console.buffer_size = buffer_size;
2004
2005 return 0;
2006 }
2007
2008 static int set_config_console_size(const char *key, const char *value,
2009 struct lxc_conf *lxc_conf, void *data)
2010 {
2011 int ret;
2012 int64_t size;
2013 uint64_t log_size, pgsz;
2014
2015 if (lxc_config_value_empty(value)) {
2016 lxc_conf->console.log_size = 0;
2017 return 0;
2018 }
2019
2020 /* If the user specified "auto" the default log size is 2^17 = 128 Kib */
2021 if (!strcmp(value, "auto")) {
2022 lxc_conf->console.log_size = 1 << 17;
2023 return 0;
2024 }
2025
2026 ret = parse_byte_size_string(value, &size);
2027 if (ret < 0)
2028 return -1;
2029
2030 if (size < 0)
2031 return -EINVAL;
2032
2033 /* must be at least a page size */
2034 pgsz = lxc_getpagesize();
2035 if ((uint64_t)size < pgsz) {
2036 NOTICE("Requested ringbuffer size for the console is %" PRId64
2037 " but must be at least %" PRId64
2038 " bytes. Setting ringbuffer size to %" PRId64 " bytes",
2039 size, pgsz, pgsz);
2040 size = pgsz;
2041 }
2042
2043 log_size = lxc_find_next_power2((uint64_t)size);
2044 if (log_size == 0)
2045 return -EINVAL;
2046
2047 if (log_size != size)
2048 NOTICE("Passed size was not a power of 2. Rounding log size to "
2049 "next power of two: %" PRIu64 " bytes", log_size);
2050
2051 lxc_conf->console.log_size = log_size;
2052
2053 return 0;
2054 }
2055
2056 int append_unexp_config_line(const char *line, struct lxc_conf *conf)
2057 {
2058 size_t linelen;
2059 size_t len = conf->unexpanded_len;
2060
2061 update_hwaddr(line);
2062
2063 linelen = strlen(line);
2064 while (conf->unexpanded_alloced <= len + linelen + 2) {
2065 char *tmp = realloc(conf->unexpanded_config,
2066 conf->unexpanded_alloced + 1024);
2067 if (!tmp)
2068 return -1;
2069
2070 if (!conf->unexpanded_config)
2071 *tmp = '\0';
2072
2073 conf->unexpanded_config = tmp;
2074 conf->unexpanded_alloced += 1024;
2075 }
2076
2077 memcpy(conf->unexpanded_config + conf->unexpanded_len, line, linelen);
2078 conf->unexpanded_len += linelen;
2079 if (line[linelen - 1] != '\n')
2080 conf->unexpanded_config[conf->unexpanded_len++] = '\n';
2081 conf->unexpanded_config[conf->unexpanded_len] = '\0';
2082
2083 return 0;
2084 }
2085
2086 static int do_includedir(const char *dirp, struct lxc_conf *lxc_conf)
2087 {
2088 struct dirent *direntp;
2089 DIR *dir;
2090 char path[PATH_MAX];
2091 int len;
2092 int ret = -1;
2093
2094 dir = opendir(dirp);
2095 if (!dir)
2096 return -1;
2097
2098 while ((direntp = readdir(dir))) {
2099 const char *fnam;
2100
2101 fnam = direntp->d_name;
2102 if (!strcmp(fnam, "."))
2103 continue;
2104
2105 if (!strcmp(fnam, ".."))
2106 continue;
2107
2108 len = strlen(fnam);
2109 if (len < 6 || strncmp(fnam + len - 5, ".conf", 5) != 0)
2110 continue;
2111
2112 len = snprintf(path, PATH_MAX, "%s/%s", dirp, fnam);
2113 if (len < 0 || len >= PATH_MAX) {
2114 ret = -1;
2115 goto out;
2116 }
2117
2118 ret = lxc_config_read(path, lxc_conf, true);
2119 if (ret < 0)
2120 goto out;
2121 }
2122 ret = 0;
2123
2124 out:
2125 closedir(dir);
2126
2127 return ret;
2128 }
2129
2130 static int set_config_includefiles(const char *key, const char *value,
2131 struct lxc_conf *lxc_conf, void *data)
2132 {
2133 if (lxc_config_value_empty(value)) {
2134 clr_config_includefiles(key, lxc_conf, NULL);
2135 return 0;
2136 }
2137
2138 if (is_dir(value))
2139 return do_includedir(value, lxc_conf);
2140
2141 return lxc_config_read(value, lxc_conf, true);
2142 }
2143
2144 static int set_config_rootfs_path(const char *key, const char *value,
2145 struct lxc_conf *lxc_conf, void *data)
2146 {
2147 int ret;
2148 char *dup, *tmp;
2149 const char *container_path;
2150
2151 if (lxc_config_value_empty(value)) {
2152 free(lxc_conf->rootfs.path);
2153 lxc_conf->rootfs.path = NULL;
2154 return 0;
2155 }
2156
2157 dup = strdup(value);
2158 if (!dup)
2159 return -1;
2160
2161 /* Split <storage type>:<container path> into <storage type> and
2162 * <container path>. Set "rootfs.bdev_type" to <storage type> and
2163 * "rootfs.path" to <container path>.
2164 */
2165 tmp = strchr(dup, ':');
2166 if (tmp) {
2167 *tmp = '\0';
2168
2169 ret = set_config_path_item(&lxc_conf->rootfs.bdev_type, dup);
2170 if (ret < 0) {
2171 free(dup);
2172 return -1;
2173 }
2174
2175 tmp++;
2176 container_path = tmp;
2177 } else {
2178 container_path = value;
2179 }
2180
2181 ret = set_config_path_item(&lxc_conf->rootfs.path, container_path);
2182 free(dup);
2183
2184 return ret;
2185 }
2186
2187 static int set_config_rootfs_managed(const char *key, const char *value,
2188 struct lxc_conf *lxc_conf, void *data)
2189 {
2190 unsigned int val = 0;
2191
2192 if (lxc_config_value_empty(value)) {
2193 lxc_conf->rootfs.managed = true;
2194 return 0;
2195 }
2196
2197 if (lxc_safe_uint(value, &val) < 0)
2198 return -EINVAL;
2199
2200 switch (val) {
2201 case 0:
2202 lxc_conf->rootfs.managed = false;
2203 return 0;
2204 case 1:
2205 lxc_conf->rootfs.managed = true;
2206 return 0;
2207 }
2208
2209 return -EINVAL;
2210 }
2211
2212 static int set_config_rootfs_mount(const char *key, const char *value,
2213 struct lxc_conf *lxc_conf, void *data)
2214 {
2215 return set_config_path_item(&lxc_conf->rootfs.mount, value);
2216 }
2217
2218 static int set_config_rootfs_options(const char *key, const char *value,
2219 struct lxc_conf *lxc_conf, void *data)
2220 {
2221 int ret;
2222 unsigned long mflags = 0, pflags = 0;
2223 char *mdata = NULL, *opts = NULL;
2224 struct lxc_rootfs *rootfs = &lxc_conf->rootfs;
2225
2226 ret = parse_mntopts(value, &mflags, &mdata);
2227 if (ret < 0)
2228 return -EINVAL;
2229
2230 ret = parse_propagationopts(value, &pflags);
2231 if (ret < 0) {
2232 free(mdata);
2233 return -EINVAL;
2234 }
2235
2236 ret = set_config_string_item(&opts, value);
2237 if (ret < 0) {
2238 free(mdata);
2239 return -ENOMEM;
2240 }
2241
2242 rootfs->mountflags = mflags | pflags;
2243 rootfs->options = opts;
2244 rootfs->data = mdata;
2245
2246 return 0;
2247 }
2248
2249 static int set_config_uts_name(const char *key, const char *value,
2250 struct lxc_conf *lxc_conf, void *data)
2251 {
2252 struct utsname *utsname;
2253
2254 if (lxc_config_value_empty(value)) {
2255 clr_config_uts_name(key, lxc_conf, NULL);
2256 return 0;
2257 }
2258
2259 utsname = malloc(sizeof(*utsname));
2260 if (!utsname)
2261 return -1;
2262
2263 if (strlen(value) >= sizeof(utsname->nodename)) {
2264 free(utsname);
2265 return -1;
2266 }
2267
2268 (void)strlcpy(utsname->nodename, value, sizeof(utsname->nodename));
2269 free(lxc_conf->utsname);
2270 lxc_conf->utsname = utsname;
2271
2272 return 0;
2273 }
2274
2275 static int set_config_namespace_clone(const char *key, const char *value,
2276 struct lxc_conf *lxc_conf, void *data)
2277 {
2278 char *ns, *token;
2279 int cloneflag = 0;
2280
2281 if (lxc_config_value_empty(value))
2282 return clr_config_namespace_clone(key, lxc_conf, data);
2283
2284 if (lxc_conf->ns_keep != 0) {
2285 errno = EINVAL;
2286 SYSERROR("Cannot set both \"lxc.namespace.clone\" and "
2287 "\"lxc.namespace.keep\"");
2288 return -EINVAL;
2289 }
2290
2291 ns = strdup(value);
2292 if (!ns)
2293 return -1;
2294
2295 lxc_iterate_parts(token, ns, " \t") {
2296 token += lxc_char_left_gc(token, strlen(token));
2297 token[lxc_char_right_gc(token, strlen(token))] = '\0';
2298 cloneflag = lxc_namespace_2_cloneflag(token);
2299 if (cloneflag < 0) {
2300 free(ns);
2301 return -EINVAL;
2302 }
2303 lxc_conf->ns_clone |= cloneflag;
2304 }
2305 free(ns);
2306
2307 return 0;
2308 }
2309
2310 static int set_config_namespace_keep(const char *key, const char *value,
2311 struct lxc_conf *lxc_conf, void *data)
2312 {
2313 char *ns, *token;
2314 int cloneflag = 0;
2315
2316 if (lxc_config_value_empty(value))
2317 return clr_config_namespace_keep(key, lxc_conf, data);
2318
2319 if (lxc_conf->ns_clone != 0) {
2320 errno = EINVAL;
2321 SYSERROR("Cannot set both \"lxc.namespace.clone\" and "
2322 "\"lxc.namespace.keep\"");
2323 return -EINVAL;
2324 }
2325
2326 ns = strdup(value);
2327 if (!ns)
2328 return -1;
2329
2330 lxc_iterate_parts(token, ns, " \t") {
2331 token += lxc_char_left_gc(token, strlen(token));
2332 token[lxc_char_right_gc(token, strlen(token))] = '\0';
2333 cloneflag = lxc_namespace_2_cloneflag(token);
2334 if (cloneflag < 0) {
2335 free(ns);
2336 return -EINVAL;
2337 }
2338 lxc_conf->ns_keep |= cloneflag;
2339 }
2340 free(ns);
2341
2342 return 0;
2343 }
2344
2345 static int set_config_namespace_share(const char *key, const char *value,
2346 struct lxc_conf *lxc_conf, void *data)
2347 {
2348 int ns_idx;
2349 const char *namespace;
2350
2351 if (lxc_config_value_empty(value))
2352 return clr_config_namespace_share(key, lxc_conf, data);
2353
2354 namespace = key + STRLITERALLEN("lxc.namespace.share.");
2355 ns_idx = lxc_namespace_2_ns_idx(namespace);
2356 if (ns_idx < 0)
2357 return ns_idx;
2358
2359 return set_config_string_item(&lxc_conf->ns_share[ns_idx], value);
2360 }
2361
2362 struct parse_line_conf {
2363 struct lxc_conf *conf;
2364 bool from_include;
2365 };
2366
2367 static int parse_line(char *buffer, void *data)
2368 {
2369 char *dot, *key, *line, *linep, *value;
2370 bool empty_line;
2371 struct lxc_config_t *config;
2372 int ret = 0;
2373 char *dup = buffer;
2374 struct parse_line_conf *plc = data;
2375
2376 /* If there are newlines in the config file we should keep them. */
2377 empty_line = lxc_is_line_empty(dup);
2378 if (empty_line)
2379 dup = "\n";
2380
2381 /* We have to dup the buffer otherwise, at the re-exec for reboot we
2382 * modified the original string on the stack by replacing '=' by '\0'
2383 * below.
2384 */
2385 linep = line = strdup(dup);
2386 if (!line)
2387 return -1;
2388
2389 if (!plc->from_include) {
2390 ret = append_unexp_config_line(line, plc->conf);
2391 if (ret < 0)
2392 goto on_error;
2393 }
2394
2395 if (empty_line)
2396 goto on_error;
2397
2398 line += lxc_char_left_gc(line, strlen(line));
2399
2400 /* ignore comments */
2401 if (line[0] == '#')
2402 goto on_error;
2403
2404 /* martian option - don't add it to the config itself */
2405 if (strncmp(line, "lxc.", 4))
2406 goto on_error;
2407
2408 ret = -1;
2409
2410 dot = strchr(line, '=');
2411 if (!dot) {
2412 ERROR("Invalid configuration line: %s", line);
2413 goto on_error;
2414 }
2415
2416 *dot = '\0';
2417 value = dot + 1;
2418
2419 key = line;
2420 key[lxc_char_right_gc(key, strlen(key))] = '\0';
2421
2422 value += lxc_char_left_gc(value, strlen(value));
2423 value[lxc_char_right_gc(value, strlen(value))] = '\0';
2424
2425 if (*value == '\'' || *value == '\"') {
2426 size_t len;
2427
2428 len = strlen(value);
2429 if (len > 1 && value[len - 1] == *value) {
2430 value[len - 1] = '\0';
2431 value++;
2432 }
2433 }
2434
2435 config = lxc_get_config(key);
2436 if (!config) {
2437 ERROR("Unknown configuration key \"%s\"", key);
2438 goto on_error;
2439 }
2440
2441 ret = config->set(key, value, plc->conf, NULL);
2442
2443 on_error:
2444 free(linep);
2445
2446 return ret;
2447 }
2448
2449 static struct new_config_item *parse_new_conf_line(char *buffer)
2450 {
2451 char *dot, *key, *line, *linep, *value;
2452 int ret = 0;
2453 char *dup = buffer;
2454 struct new_config_item *new = NULL;
2455
2456 linep = line = strdup(dup);
2457 if (!line)
2458 return NULL;
2459
2460 line += lxc_char_left_gc(line, strlen(line));
2461
2462 /* martian option - don't add it to the config itself */
2463 if (strncmp(line, "lxc.", 4))
2464 goto on_error;
2465
2466 ret = -1;
2467 dot = strchr(line, '=');
2468 if (!dot) {
2469 ERROR("Invalid configuration item: %s", line);
2470 goto on_error;
2471 }
2472
2473 *dot = '\0';
2474 value = dot + 1;
2475
2476 key = line;
2477 key[lxc_char_right_gc(key, strlen(key))] = '\0';
2478
2479 value += lxc_char_left_gc(value, strlen(value));
2480 value[lxc_char_right_gc(value, strlen(value))] = '\0';
2481
2482 if (*value == '\'' || *value == '\"') {
2483 size_t len;
2484
2485 len = strlen(value);
2486 if (len > 1 && value[len - 1] == *value) {
2487 value[len - 1] = '\0';
2488 value++;
2489 }
2490 }
2491
2492 ret = -1;
2493 new = malloc(sizeof(struct new_config_item));
2494 if (!new)
2495 goto on_error;
2496
2497 new->key = strdup(key);
2498 new->val = strdup(value);
2499 if (!new->val || !new->key)
2500 goto on_error;
2501
2502 ret = 0;
2503
2504 on_error:
2505 free(linep);
2506
2507 if (ret < 0 && new) {
2508 free(new->key);
2509 free(new->val);
2510 free(new);
2511 new = NULL;
2512 }
2513
2514 return new;
2515 }
2516
2517 int lxc_config_read(const char *file, struct lxc_conf *conf, bool from_include)
2518 {
2519 struct parse_line_conf c;
2520
2521 c.conf = conf;
2522 c.from_include = from_include;
2523
2524 /* Catch only the top level config file name in the structure. */
2525 if (!conf->rcfile)
2526 conf->rcfile = strdup(file);
2527
2528 return lxc_file_for_each_line_mmap(file, parse_line, &c);
2529 }
2530
2531 int lxc_config_define_add(struct lxc_list *defines, char *arg)
2532 {
2533 struct lxc_list *dent;
2534
2535 dent = malloc(sizeof(struct lxc_list));
2536 if (!dent)
2537 return -1;
2538
2539 dent->elem = parse_new_conf_line(arg);
2540 if (!dent->elem) {
2541 free(dent);
2542 return -1;
2543 }
2544
2545 lxc_list_add_tail(defines, dent);
2546
2547 return 0;
2548 }
2549
2550 bool lxc_config_define_load(struct lxc_list *defines, struct lxc_container *c)
2551 {
2552 struct lxc_list *it;
2553 bool bret = true;
2554
2555 lxc_list_for_each(it, defines) {
2556 struct new_config_item *new_item = it->elem;
2557 bret = c->set_config_item(c, new_item->key, new_item->val);
2558 if (!bret)
2559 break;
2560 }
2561
2562 lxc_config_define_free(defines);
2563
2564 return bret;
2565 }
2566
2567 void lxc_config_define_free(struct lxc_list *defines)
2568 {
2569 struct lxc_list *it, *next;
2570
2571 lxc_list_for_each_safe(it, defines, next) {
2572 struct new_config_item *new_item = it->elem;
2573 free(new_item->key);
2574 free(new_item->val);
2575 lxc_list_del(it);
2576 free(it);
2577 }
2578 }
2579
2580 signed long lxc_config_parse_arch(const char *arch)
2581 {
2582 #if HAVE_SYS_PERSONALITY_H
2583 size_t i;
2584 struct per_name {
2585 char *name;
2586 unsigned long per;
2587 } pername[] = {
2588 { "arm", PER_LINUX32 },
2589 { "armel", PER_LINUX32 },
2590 { "armhf", PER_LINUX32 },
2591 { "armv7l", PER_LINUX32 },
2592 { "athlon", PER_LINUX32 },
2593 { "i386", PER_LINUX32 },
2594 { "i486", PER_LINUX32 },
2595 { "i586", PER_LINUX32 },
2596 { "i686", PER_LINUX32 },
2597 { "linux32", PER_LINUX32 },
2598 { "mips", PER_LINUX32 },
2599 { "mipsel", PER_LINUX32 },
2600 { "ppc", PER_LINUX32 },
2601 { "powerpc", PER_LINUX32 },
2602 { "x86", PER_LINUX32 },
2603 { "amd64", PER_LINUX },
2604 { "arm64", PER_LINUX },
2605 { "linux64", PER_LINUX },
2606 { "mips64", PER_LINUX },
2607 { "mips64el", PER_LINUX },
2608 { "ppc64", PER_LINUX },
2609 { "ppc64el", PER_LINUX },
2610 { "ppc64le", PER_LINUX },
2611 { "powerpc64", PER_LINUX },
2612 { "s390x", PER_LINUX },
2613 { "x86_64", PER_LINUX },
2614 };
2615 size_t len = sizeof(pername) / sizeof(pername[0]);
2616
2617 for (i = 0; i < len; i++)
2618 if (!strcmp(pername[i].name, arch))
2619 return pername[i].per;
2620 #endif
2621
2622 return -1;
2623 }
2624
2625 int lxc_fill_elevated_privileges(char *flaglist, int *flags)
2626 {
2627 char *token;
2628 int i, aflag;
2629 struct {
2630 const char *token;
2631 int flag;
2632 } all_privs[] = {
2633 { "CGROUP", LXC_ATTACH_MOVE_TO_CGROUP },
2634 { "CAP", LXC_ATTACH_DROP_CAPABILITIES },
2635 { "LSM", LXC_ATTACH_LSM_EXEC },
2636 { NULL, 0 }
2637 };
2638
2639 if (!flaglist) {
2640 /* For the sake of backward compatibility, drop all privileges
2641 * if none is specified.
2642 */
2643 for (i = 0; all_privs[i].token; i++)
2644 *flags |= all_privs[i].flag;
2645
2646 return 0;
2647 }
2648
2649 lxc_iterate_parts(token, flaglist, "|") {
2650 aflag = -1;
2651
2652 for (i = 0; all_privs[i].token; i++)
2653 if (!strcmp(all_privs[i].token, token))
2654 aflag = all_privs[i].flag;
2655
2656 if (aflag < 0)
2657 return -1;
2658
2659 *flags |= aflag;
2660 }
2661
2662 return 0;
2663 }
2664
2665 /* Write out a configuration file. */
2666 int write_config(int fd, const struct lxc_conf *conf)
2667 {
2668 int ret;
2669 size_t len = conf->unexpanded_len;
2670
2671 if (len == 0)
2672 return 0;
2673
2674 ret = lxc_write_nointr(fd, conf->unexpanded_config, len);
2675 if (ret < 0) {
2676 SYSERROR("Failed to write configuration file");
2677 return -1;
2678 }
2679
2680 return 0;
2681 }
2682
2683 bool do_append_unexp_config_line(struct lxc_conf *conf, const char *key,
2684 const char *v)
2685 {
2686 int ret;
2687 size_t len;
2688 char *tmp;
2689
2690 len = strlen(key) + strlen(v) + 4;
2691 tmp = alloca(len);
2692
2693 if (lxc_config_value_empty(v))
2694 ret = snprintf(tmp, len, "%s =", key);
2695 else
2696 ret = snprintf(tmp, len, "%s = %s", key, v);
2697 if (ret < 0 || ret >= len)
2698 return false;
2699
2700 /* Save the line verbatim into unexpanded_conf */
2701 if (append_unexp_config_line(tmp, conf))
2702 return false;
2703
2704 return true;
2705 }
2706
2707 void clear_unexp_config_line(struct lxc_conf *conf, const char *key,
2708 bool rm_subkeys)
2709 {
2710 char *lend;
2711 char *lstart = conf->unexpanded_config;
2712
2713 if (!conf->unexpanded_config)
2714 return;
2715
2716 while (*lstart) {
2717 lend = strchr(lstart, '\n');
2718 char v;
2719
2720 if (!lend)
2721 lend = lstart + strlen(lstart);
2722 else
2723 lend++;
2724
2725 if (strncmp(lstart, key, strlen(key)) != 0) {
2726 lstart = lend;
2727 continue;
2728 }
2729
2730 if (!rm_subkeys) {
2731 v = lstart[strlen(key)];
2732 if (!isspace(v) && v != '=') {
2733 lstart = lend;
2734 continue;
2735 }
2736 }
2737
2738 conf->unexpanded_len -= (lend - lstart);
2739
2740 if (*lend == '\0') {
2741 *lstart = '\0';
2742 return;
2743 }
2744
2745 memmove(lstart, lend, strlen(lend) + 1);
2746 }
2747 }
2748
2749 bool clone_update_unexp_ovl_paths(struct lxc_conf *conf, const char *oldpath,
2750 const char *newpath, const char *oldname,
2751 const char *newname, const char *ovldir)
2752 {
2753 int ret;
2754 char *lend, *newdir, *olddir, *p, *q;
2755 size_t newdirlen, olddirlen;
2756 char *lstart = conf->unexpanded_config;
2757 const char *key = "lxc.mount.entry";
2758
2759 olddirlen = strlen(ovldir) + strlen(oldpath) + strlen(oldname) + 2;
2760 olddir = alloca(olddirlen + 1);
2761 ret = snprintf(olddir, olddirlen + 1, "%s=%s/%s", ovldir, oldpath,
2762 oldname);
2763 if (ret < 0 || ret >= olddirlen + 1)
2764 return false;
2765
2766 newdirlen = strlen(ovldir) + strlen(newpath) + strlen(newname) + 2;
2767 newdir = alloca(newdirlen + 1);
2768 ret = snprintf(newdir, newdirlen + 1, "%s=%s/%s", ovldir, newpath,
2769 newname);
2770 if (ret < 0 || ret >= newdirlen + 1)
2771 return false;
2772
2773 if (!conf->unexpanded_config)
2774 return true;
2775
2776 while (*lstart) {
2777 lend = strchr(lstart, '\n');
2778 if (!lend)
2779 lend = lstart + strlen(lstart);
2780 else
2781 lend++;
2782
2783 if (strncmp(lstart, key, strlen(key)) != 0)
2784 goto next;
2785
2786 p = strchr(lstart + strlen(key), '=');
2787 if (!p)
2788 goto next;
2789 p++;
2790
2791 while (isblank(*p))
2792 p++;
2793
2794 if (p >= lend)
2795 goto next;
2796
2797 /* Whenever a lxc.mount.entry entry is found in a line we check
2798 * if the substring "overlay" is present before doing any
2799 * further work. We check for "overlay" because substrings need
2800 * to have at least one space before them in a valid overlay
2801 * lxc.mount.entry (/A B overlay). When the space before is
2802 * missing it is very likely that these substrings are part of a
2803 * path or something else. (Checking q >= lend ensures that we
2804 * only count matches in the current line.) */
2805 q = strstr(p, " overlay");
2806 if (!q || q >= lend)
2807 goto next;
2808
2809 if (!(q = strstr(p, olddir)) || (q >= lend))
2810 goto next;
2811
2812 /* replace the olddir with newdir */
2813 if (olddirlen >= newdirlen) {
2814 size_t diff = olddirlen - newdirlen;
2815 memcpy(q, newdir, newdirlen);
2816
2817 if (olddirlen != newdirlen) {
2818 memmove(q + newdirlen, q + newdirlen + diff,
2819 strlen(q) - newdirlen - diff + 1);
2820 lend -= diff;
2821 conf->unexpanded_len -= diff;
2822 }
2823 } else {
2824 char *new;
2825 size_t diff = newdirlen - olddirlen;
2826 size_t oldlen = conf->unexpanded_len;
2827 size_t newlen = oldlen + diff;
2828 size_t poffset = q - conf->unexpanded_config;
2829
2830 new = realloc(conf->unexpanded_config, newlen + 1);
2831 if (!new)
2832 return false;
2833
2834 conf->unexpanded_len = newlen;
2835 conf->unexpanded_alloced = newlen + 1;
2836 new[newlen - 1] = '\0';
2837 lend = new + (lend - conf->unexpanded_config);
2838
2839 /* Move over the remainder to make room for the newdir.
2840 */
2841 memmove(new + poffset + newdirlen,
2842 new + poffset + olddirlen,
2843 oldlen - poffset - olddirlen + 1);
2844 conf->unexpanded_config = new;
2845
2846 memcpy(new + poffset, newdir, newdirlen);
2847 lend += diff;
2848 }
2849
2850 next:
2851 lstart = lend;
2852 }
2853
2854 return true;
2855 }
2856
2857 bool clone_update_unexp_hooks(struct lxc_conf *conf, const char *oldpath,
2858 const char *newpath, const char *oldname,
2859 const char *newname)
2860 {
2861 int ret;
2862 char *lend, *newdir, *olddir, *p;
2863 char *lstart = conf->unexpanded_config;
2864 size_t newdirlen, olddirlen;
2865 const char *key = "lxc.hook";
2866
2867 olddirlen = strlen(oldpath) + strlen(oldname) + 1;
2868 olddir = alloca(olddirlen + 1);
2869 ret = snprintf(olddir, olddirlen + 1, "%s/%s", oldpath, oldname);
2870 if (ret < 0 || ret >= olddirlen + 1)
2871 return false;
2872
2873 newdirlen = strlen(newpath) + strlen(newname) + 1;
2874 newdir = alloca(newdirlen + 1);
2875 ret = snprintf(newdir, newdirlen + 1, "%s/%s", newpath, newname);
2876 if (ret < 0 || ret >= newdirlen + 1)
2877 return false;
2878
2879 if (!conf->unexpanded_config)
2880 return true;
2881
2882 while (*lstart) {
2883 lend = strchr(lstart, '\n');
2884 if (!lend)
2885 lend = lstart + strlen(lstart);
2886 else
2887 lend++;
2888
2889 if (strncmp(lstart, key, strlen(key)) != 0)
2890 goto next;
2891
2892 p = strchr(lstart + strlen(key), '=');
2893 if (!p)
2894 goto next;
2895 p++;
2896
2897 while (isblank(*p))
2898 p++;
2899
2900 if (p >= lend)
2901 goto next;
2902
2903 if (strncmp(p, olddir, strlen(olddir)) != 0)
2904 goto next;
2905
2906 /* replace the olddir with newdir */
2907 if (olddirlen >= newdirlen) {
2908 size_t diff = olddirlen - newdirlen;
2909 memcpy(p, newdir, newdirlen);
2910
2911 if (olddirlen != newdirlen) {
2912 memmove(p + newdirlen, p + newdirlen + diff,
2913 strlen(p) - newdirlen - diff + 1);
2914 lend -= diff;
2915 conf->unexpanded_len -= diff;
2916 }
2917 } else {
2918 char *new;
2919 size_t diff = newdirlen - olddirlen;
2920 size_t oldlen = conf->unexpanded_len;
2921 size_t newlen = oldlen + diff;
2922 size_t poffset = p - conf->unexpanded_config;
2923
2924 new = realloc(conf->unexpanded_config, newlen + 1);
2925 if (!new)
2926 return false;
2927
2928 conf->unexpanded_len = newlen;
2929 conf->unexpanded_alloced = newlen + 1;
2930 new[newlen - 1] = '\0';
2931 lend = new + (lend - conf->unexpanded_config);
2932
2933 /* Move over the remainder to make room for the newdir.
2934 */
2935 memmove(new + poffset + newdirlen,
2936 new + poffset + olddirlen,
2937 oldlen - poffset - olddirlen + 1);
2938 conf->unexpanded_config = new;
2939
2940 memcpy(new + poffset, newdir, newdirlen);
2941 lend += diff;
2942 }
2943
2944 next:
2945 lstart = lend;
2946 }
2947
2948 return true;
2949 }
2950
2951 #define DO(cmd) \
2952 { \
2953 if (!(cmd)) { \
2954 ERROR("Error writing to new config"); \
2955 return false; \
2956 } \
2957 }
2958
2959 /* This is called only from clone. We wish to update all hwaddrs in the
2960 * unexpanded config file. We can't/don't want to update any which come from
2961 * lxc.includes (there shouldn't be any).
2962 * We can't just walk the c->lxc-conf->network list because that includes netifs
2963 * from the include files. So we update the ones which we find in the unexp
2964 * config file, then find the original macaddr in the conf->network, and update
2965 * that to the same value.
2966 */
2967 bool network_new_hwaddrs(struct lxc_conf *conf)
2968 {
2969 char *lend, *p, *p2;
2970 struct lxc_list *it;
2971 char *lstart = conf->unexpanded_config;
2972
2973 if (!conf->unexpanded_config)
2974 return true;
2975
2976 while (*lstart) {
2977 char newhwaddr[18], oldhwaddr[17];
2978
2979 lend = strchr(lstart, '\n');
2980 if (!lend)
2981 lend = lstart + strlen(lstart);
2982 else
2983 lend++;
2984
2985 if (!lxc_config_net_hwaddr(lstart)) {
2986 lstart = lend;
2987 continue;
2988 }
2989
2990 p = strchr(lstart, '=');
2991 if (!p) {
2992 lstart = lend;
2993 continue;
2994 }
2995
2996 p++;
2997 while (isblank(*p))
2998 p++;
2999 if (!*p)
3000 return true;
3001
3002 p2 = p;
3003 while (*p2 && !isblank(*p2) && *p2 != '\n')
3004 p2++;
3005
3006 if ((p2 - p) != 17) {
3007 WARN("Bad hwaddr entry");
3008 lstart = lend;
3009 continue;
3010 }
3011
3012 memcpy(oldhwaddr, p, 17);
3013
3014 if (!new_hwaddr(newhwaddr))
3015 return false;
3016
3017 memcpy(p, newhwaddr, 17);
3018 lxc_list_for_each(it, &conf->network) {
3019 struct lxc_netdev *n = it->elem;
3020
3021 if (n->hwaddr && memcmp(oldhwaddr, n->hwaddr, 17) == 0)
3022 memcpy(n->hwaddr, newhwaddr, 17);
3023 }
3024
3025 lstart = lend;
3026 }
3027
3028 return true;
3029 }
3030
3031 static int set_config_ephemeral(const char *key, const char *value,
3032 struct lxc_conf *lxc_conf, void *data)
3033 {
3034 if (lxc_config_value_empty(value)) {
3035 lxc_conf->ephemeral = 0;
3036 return 0;
3037 }
3038
3039 if (lxc_safe_uint(value, &lxc_conf->ephemeral) < 0)
3040 return -1;
3041
3042 if (lxc_conf->ephemeral > 1)
3043 return -1;
3044
3045 return 0;
3046 }
3047
3048 static int set_config_log_syslog(const char *key, const char *value,
3049 struct lxc_conf *lxc_conf, void *data)
3050 {
3051 int facility;
3052
3053 if (lxc_conf->syslog) {
3054 free(lxc_conf->syslog);
3055 lxc_conf->syslog = NULL;
3056 }
3057
3058 if (lxc_config_value_empty(value))
3059 return 0;
3060
3061 facility = lxc_syslog_priority_to_int(value);
3062 if (facility == -EINVAL)
3063 return -1;
3064
3065 lxc_log_syslog(facility);
3066
3067 return set_config_string_item(&lxc_conf->syslog, value);
3068 }
3069
3070 static int set_config_no_new_privs(const char *key, const char *value,
3071 struct lxc_conf *lxc_conf, void *data)
3072 {
3073 unsigned int v;
3074
3075 if (lxc_config_value_empty(value)) {
3076 lxc_conf->no_new_privs = false;
3077 return 0;
3078 }
3079
3080 if (lxc_safe_uint(value, &v) < 0)
3081 return -1;
3082
3083 if (v > 1)
3084 return -1;
3085
3086 lxc_conf->no_new_privs = v ? true : false;
3087
3088 return 0;
3089 }
3090
3091 /* Callbacks to get configuration items. */
3092 static int get_config_personality(const char *key, char *retv, int inlen,
3093 struct lxc_conf *c, void *data)
3094 {
3095 int fulllen = 0;
3096
3097 if (!retv)
3098 inlen = 0;
3099 else
3100 memset(retv, 0, inlen);
3101
3102 #if HAVE_SYS_PERSONALITY_H
3103 int len = 0;
3104
3105 switch (c->personality) {
3106 case PER_LINUX32:
3107 strprint(retv, inlen, "i686");
3108 break;
3109 case PER_LINUX:
3110 strprint(retv, inlen, "x86_64");
3111 break;
3112 default:
3113 break;
3114 }
3115 #endif
3116
3117 return fulllen;
3118 }
3119
3120 static int get_config_pty_max(const char *key, char *retv, int inlen,
3121 struct lxc_conf *c, void *data)
3122 {
3123 return lxc_get_conf_size_t(c, retv, inlen, c->pty_max);
3124 }
3125
3126 static int get_config_tty_max(const char *key, char *retv, int inlen,
3127 struct lxc_conf *c, void *data)
3128 {
3129 return lxc_get_conf_size_t(c, retv, inlen, c->ttys.max);
3130 }
3131
3132 static int get_config_tty_dir(const char *key, char *retv, int inlen,
3133 struct lxc_conf *c, void *data)
3134 {
3135 return lxc_get_conf_str(retv, inlen, c->ttys.dir);
3136 }
3137
3138 static int get_config_apparmor_profile(const char *key, char *retv, int inlen,
3139 struct lxc_conf *c, void *data)
3140 {
3141 return lxc_get_conf_str(retv, inlen, c->lsm_aa_profile);
3142 }
3143
3144 static int get_config_apparmor_allow_incomplete(const char *key, char *retv,
3145 int inlen, struct lxc_conf *c,
3146 void *data)
3147 {
3148 return lxc_get_conf_int(c, retv, inlen,
3149 c->lsm_aa_allow_incomplete);
3150 }
3151
3152 static int get_config_apparmor_allow_nesting(const char *key, char *retv,
3153 int inlen, struct lxc_conf *c,
3154 void *data)
3155 {
3156 return lxc_get_conf_int(c, retv, inlen,
3157 c->lsm_aa_allow_nesting);
3158 }
3159
3160 static int get_config_apparmor_raw(const char *key, char *retv,
3161 int inlen, struct lxc_conf *c,
3162 void *data)
3163 {
3164 int len;
3165 struct lxc_list *it;
3166 int fulllen = 0;
3167
3168 if (!retv)
3169 inlen = 0;
3170 else
3171 memset(retv, 0, inlen);
3172
3173 lxc_list_for_each(it, &c->lsm_aa_raw) {
3174 strprint(retv, inlen, "%s\n", (char *)it->elem);
3175 }
3176
3177 return fulllen;
3178 }
3179
3180 static int get_config_selinux_context(const char *key, char *retv, int inlen,
3181 struct lxc_conf *c, void *data)
3182 {
3183 return lxc_get_conf_str(retv, inlen, c->lsm_se_context);
3184 }
3185
3186 /* If you ask for a specific cgroup value, i.e. lxc.cgroup.devices.list, then
3187 * just the value(s) will be printed. Since there still could be more than one,
3188 * it is newline-separated.
3189 * (Maybe that's ambiguous, since some values, i.e. devices.list, will already
3190 * have newlines?)
3191 * If you ask for 'lxc.cgroup", then all cgroup entries will be printed, in
3192 * 'lxc.cgroup.subsystem.key = value' format.
3193 */
3194 static int __get_config_cgroup_controller(const char *key, char *retv,
3195 int inlen, struct lxc_conf *c,
3196 int version)
3197 {
3198 int len;
3199 size_t namespaced_token_len;
3200 char *global_token, *namespaced_token;
3201 struct lxc_list *it;
3202 int fulllen = 0;
3203 bool get_all = false;
3204
3205 if (!retv)
3206 inlen = 0;
3207 else
3208 memset(retv, 0, inlen);
3209
3210 if (version == CGROUP2_SUPER_MAGIC) {
3211 global_token = "lxc.cgroup2";
3212 namespaced_token = "lxc.cgroup2.";
3213 namespaced_token_len = STRLITERALLEN("lxc.cgroup2.");
3214 } else if (version == CGROUP_SUPER_MAGIC) {
3215 global_token = "lxc.cgroup";
3216 namespaced_token = "lxc.cgroup.";
3217 namespaced_token_len = STRLITERALLEN("lxc.cgroup.");
3218 } else {
3219 return -1;
3220 }
3221
3222 if (strcmp(key, global_token) == 0)
3223 get_all = true;
3224 else if (strncmp(key, namespaced_token, namespaced_token_len) == 0)
3225 key += namespaced_token_len;
3226 else
3227 return -1;
3228
3229 lxc_list_for_each(it, &c->cgroup) {
3230 struct lxc_cgroup *cg = it->elem;
3231
3232 if (get_all) {
3233 if (version != cg->version)
3234 continue;
3235
3236 strprint(retv, inlen, "%s.%s = %s\n", global_token,
3237 cg->subsystem, cg->value);
3238 } else if (strcmp(cg->subsystem, key) == 0) {
3239 strprint(retv, inlen, "%s\n", cg->value);
3240 }
3241 }
3242
3243 return fulllen;
3244 }
3245
3246 static int get_config_cgroup_controller(const char *key, char *retv, int inlen,
3247 struct lxc_conf *c, void *data)
3248 {
3249 return __get_config_cgroup_controller(key, retv, inlen, c,
3250 CGROUP_SUPER_MAGIC);
3251 }
3252
3253 static int get_config_cgroup2_controller(const char *key, char *retv, int inlen,
3254 struct lxc_conf *c, void *data)
3255 {
3256 return __get_config_cgroup_controller(key, retv, inlen, c,
3257 CGROUP2_SUPER_MAGIC);
3258 }
3259
3260 static int get_config_cgroup_dir(const char *key, char *retv, int inlen,
3261 struct lxc_conf *lxc_conf, void *data)
3262 {
3263 int len;
3264 int fulllen = 0;
3265
3266 if (!retv)
3267 inlen = 0;
3268 else
3269 memset(retv, 0, inlen);
3270
3271 strprint(retv, inlen, "%s", lxc_conf->cgroup_meta.dir);
3272
3273 return fulllen;
3274 }
3275
3276 static inline int get_config_cgroup_relative(const char *key, char *retv,
3277 int inlen, struct lxc_conf *lxc_conf,
3278 void *data)
3279 {
3280 return lxc_get_conf_int(lxc_conf, retv, inlen,
3281 lxc_conf->cgroup_meta.relative);
3282 }
3283
3284 static int get_config_idmaps(const char *key, char *retv, int inlen,
3285 struct lxc_conf *c, void *data)
3286 {
3287 struct lxc_list *it;
3288 int len, listlen, ret;
3289 int fulllen = 0;
3290 /* "u 1000 1000000 65536"
3291 *
3292 * let's render this as
3293 *
3294 * sizeof(char)
3295 * +
3296 * sizeof(" ")
3297 * +
3298 * sizeof(uint32_t)
3299 * +
3300 * sizeof(" ")
3301 * +
3302 * sizeof(uint32_t)
3303 * +
3304 * sizeof(" ")
3305 * +
3306 * sizeof(uint32_t)
3307 * +
3308 * \0
3309 */
3310 #define __LXC_IDMAP_STR_BUF (3 * INTTYPE_TO_STRLEN(uint32_t) + 3 + 1 + 1)
3311 char buf[__LXC_IDMAP_STR_BUF];
3312
3313 if (!retv)
3314 inlen = 0;
3315 else
3316 memset(retv, 0, inlen);
3317
3318 listlen = lxc_list_len(&c->id_map);
3319 lxc_list_for_each(it, &c->id_map) {
3320 struct id_map *map = it->elem;
3321 ret = snprintf(buf, __LXC_IDMAP_STR_BUF, "%c %lu %lu %lu",
3322 (map->idtype == ID_TYPE_UID) ? 'u' : 'g',
3323 map->nsid, map->hostid, map->range);
3324 if (ret < 0 || ret >= __LXC_IDMAP_STR_BUF)
3325 return -1;
3326
3327 strprint(retv, inlen, "%s%s", buf, (listlen-- > 1) ? "\n" : "");
3328 }
3329
3330 return fulllen;
3331 }
3332
3333 static int get_config_log_level(const char *key, char *retv, int inlen,
3334 struct lxc_conf *c, void *data)
3335 {
3336 const char *v;
3337 v = lxc_log_priority_to_string(c->loglevel);
3338 return lxc_get_conf_str(retv, inlen, v);
3339 }
3340
3341 static int get_config_log_file(const char *key, char *retv, int inlen,
3342 struct lxc_conf *c, void *data)
3343 {
3344 return lxc_get_conf_str(retv, inlen, c->logfile);
3345 }
3346
3347 static int get_config_mount_fstab(const char *key, char *retv, int inlen,
3348 struct lxc_conf *c, void *data)
3349 {
3350 return lxc_get_conf_str(retv, inlen, c->fstab);
3351 }
3352
3353 static int get_config_mount_auto(const char *key, char *retv, int inlen,
3354 struct lxc_conf *c, void *data)
3355 {
3356 int len, fulllen = 0;
3357 const char *sep = "";
3358
3359 if (!retv)
3360 inlen = 0;
3361 else
3362 memset(retv, 0, inlen);
3363
3364 if (!(c->auto_mounts & LXC_AUTO_ALL_MASK))
3365 return 0;
3366
3367 switch (c->auto_mounts & LXC_AUTO_PROC_MASK) {
3368 case LXC_AUTO_PROC_MIXED:
3369 strprint(retv, inlen, "%sproc:mixed", sep);
3370 sep = " ";
3371 break;
3372 case LXC_AUTO_PROC_RW:
3373 strprint(retv, inlen, "%sproc:rw", sep);
3374 sep = " ";
3375 break;
3376 default:
3377 break;
3378 }
3379
3380 switch (c->auto_mounts & LXC_AUTO_SYS_MASK) {
3381 case LXC_AUTO_SYS_RO:
3382 strprint(retv, inlen, "%ssys:ro", sep);
3383 sep = " ";
3384 break;
3385 case LXC_AUTO_SYS_RW:
3386 strprint(retv, inlen, "%ssys:rw", sep);
3387 sep = " ";
3388 break;
3389 case LXC_AUTO_SYS_MIXED:
3390 strprint(retv, inlen, "%ssys:mixed", sep);
3391 sep = " ";
3392 break;
3393 default:
3394 break;
3395 }
3396
3397 switch (c->auto_mounts & LXC_AUTO_CGROUP_MASK) {
3398 case LXC_AUTO_CGROUP_NOSPEC:
3399 strprint(retv, inlen, "%scgroup", sep);
3400 break;
3401 case LXC_AUTO_CGROUP_MIXED:
3402 strprint(retv, inlen, "%scgroup:mixed", sep);
3403 break;
3404 case LXC_AUTO_CGROUP_RO:
3405 strprint(retv, inlen, "%scgroup:ro", sep);
3406 break;
3407 case LXC_AUTO_CGROUP_RW:
3408 strprint(retv, inlen, "%scgroup:rw", sep);
3409 break;
3410 case LXC_AUTO_CGROUP_FULL_NOSPEC:
3411 strprint(retv, inlen, "%scgroup-full", sep);
3412 break;
3413 case LXC_AUTO_CGROUP_FULL_MIXED:
3414 strprint(retv, inlen, "%scgroup-full:mixed", sep);
3415 break;
3416 case LXC_AUTO_CGROUP_FULL_RO:
3417 strprint(retv, inlen, "%scgroup-full:ro", sep);
3418 break;
3419 case LXC_AUTO_CGROUP_FULL_RW:
3420 strprint(retv, inlen, "%scgroup-full:rw", sep);
3421 break;
3422 default:
3423 break;
3424 }
3425
3426 return fulllen;
3427 }
3428
3429 static int get_config_mount(const char *key, char *retv, int inlen,
3430 struct lxc_conf *c, void *data)
3431 {
3432 int len, fulllen = 0;
3433 struct lxc_list *it;
3434
3435 if (!retv)
3436 inlen = 0;
3437 else
3438 memset(retv, 0, inlen);
3439
3440 lxc_list_for_each(it, &c->mount_list) {
3441 strprint(retv, inlen, "%s\n", (char *)it->elem);
3442 }
3443
3444 return fulllen;
3445 }
3446
3447 static int get_config_rootfs_path(const char *key, char *retv, int inlen,
3448 struct lxc_conf *c, void *data)
3449 {
3450 return lxc_get_conf_str(retv, inlen, c->rootfs.path);
3451 }
3452
3453 static int get_config_rootfs_managed(const char *key, char *retv, int inlen,
3454 struct lxc_conf *c, void *data)
3455 {
3456 return lxc_get_conf_bool(c, retv, inlen, c->rootfs.managed);
3457 }
3458
3459 static int get_config_rootfs_mount(const char *key, char *retv, int inlen,
3460 struct lxc_conf *c, void *data)
3461 {
3462 return lxc_get_conf_str(retv, inlen, c->rootfs.mount);
3463 }
3464
3465 static int get_config_rootfs_options(const char *key, char *retv, int inlen,
3466 struct lxc_conf *c, void *data)
3467 {
3468 return lxc_get_conf_str(retv, inlen, c->rootfs.options);
3469 }
3470
3471 static int get_config_uts_name(const char *key, char *retv, int inlen,
3472 struct lxc_conf *c, void *data)
3473 {
3474 return lxc_get_conf_str(
3475 retv, inlen,
3476 c->utsname ? c->utsname->nodename : NULL);
3477 }
3478
3479 static int get_config_hooks(const char *key, char *retv, int inlen,
3480 struct lxc_conf *c, void *data)
3481 {
3482 char *subkey;
3483 int len, fulllen = 0, found = -1;
3484 struct lxc_list *it;
3485 int i;
3486
3487 subkey = strchr(key, '.');
3488 if (!subkey)
3489 return -1;
3490
3491 subkey = strchr(subkey + 1, '.');
3492 if (!subkey)
3493 return -1;
3494 subkey++;
3495 if (*subkey == '\0')
3496 return -1;
3497
3498 for (i = 0; i < NUM_LXC_HOOKS; i++) {
3499 if (strcmp(lxchook_names[i], subkey) == 0) {
3500 found = i;
3501 break;
3502 }
3503 }
3504
3505 if (found == -1)
3506 return -1;
3507
3508 if (!retv)
3509 inlen = 0;
3510 else
3511 memset(retv, 0, inlen);
3512
3513 lxc_list_for_each(it, &c->hooks[found]) {
3514 strprint(retv, inlen, "%s\n", (char *)it->elem);
3515 }
3516
3517 return fulllen;
3518 }
3519
3520 static int get_config_hooks_version(const char *key, char *retv, int inlen,
3521 struct lxc_conf *c, void *data)
3522 {
3523 return lxc_get_conf_int(c, retv, inlen, c->hooks_version);
3524 }
3525
3526 static int get_config_net(const char *key, char *retv, int inlen,
3527 struct lxc_conf *c, void *data)
3528 {
3529 int len, fulllen = 0;
3530 struct lxc_list *it;
3531
3532 if (!retv)
3533 inlen = 0;
3534 else
3535 memset(retv, 0, inlen);
3536
3537 lxc_list_for_each(it, &c->network) {
3538 struct lxc_netdev *n = it->elem;
3539 const char *t = lxc_net_type_to_str(n->type);
3540 strprint(retv, inlen, "%s\n", t ? t : "(invalid)");
3541 }
3542
3543 return fulllen;
3544 }
3545
3546 static int get_config_cap_drop(const char *key, char *retv, int inlen,
3547 struct lxc_conf *c, void *data)
3548 {
3549 int len, fulllen = 0;
3550 struct lxc_list *it;
3551
3552 if (!retv)
3553 inlen = 0;
3554 else
3555 memset(retv, 0, inlen);
3556
3557 lxc_list_for_each(it, &c->caps) {
3558 strprint(retv, inlen, "%s\n", (char *)it->elem);
3559 }
3560
3561 return fulllen;
3562 }
3563
3564 static int get_config_cap_keep(const char *key, char *retv, int inlen,
3565 struct lxc_conf *c, void *data)
3566 {
3567 int len, fulllen = 0;
3568 struct lxc_list *it;
3569
3570 if (!retv)
3571 inlen = 0;
3572 else
3573 memset(retv, 0, inlen);
3574
3575 lxc_list_for_each(it, &c->keepcaps) {
3576 strprint(retv, inlen, "%s\n", (char *)it->elem);
3577 }
3578
3579 return fulllen;
3580 }
3581
3582 static int get_config_console_path(const char *key, char *retv, int inlen,
3583 struct lxc_conf *c, void *data)
3584 {
3585 return lxc_get_conf_str(retv, inlen, c->console.path);
3586 }
3587
3588 static int get_config_console_logfile(const char *key, char *retv, int inlen,
3589 struct lxc_conf *c, void *data)
3590 {
3591 return lxc_get_conf_str(retv, inlen, c->console.log_path);
3592 }
3593
3594 static int get_config_console_rotate(const char *key, char *retv, int inlen,
3595 struct lxc_conf *c, void *data)
3596 {
3597 return lxc_get_conf_int(c, retv, inlen, c->console.log_rotate);
3598 }
3599
3600
3601 static int get_config_console_buffer_size(const char *key, char *retv,
3602 int inlen, struct lxc_conf *c,
3603 void *data)
3604 {
3605 return lxc_get_conf_uint64(c, retv, inlen, c->console.buffer_size);
3606 }
3607
3608 static int get_config_console_size(const char *key, char *retv, int inlen,
3609 struct lxc_conf *c, void *data)
3610 {
3611 return lxc_get_conf_uint64(c, retv, inlen, c->console.log_size);
3612 }
3613
3614
3615 static int get_config_seccomp_profile(const char *key, char *retv, int inlen,
3616 struct lxc_conf *c, void *data)
3617 {
3618 return lxc_get_conf_str(retv, inlen, c->seccomp);
3619 }
3620
3621 static int get_config_autodev(const char *key, char *retv, int inlen,
3622 struct lxc_conf *c, void *data)
3623 {
3624 return lxc_get_conf_int(c, retv, inlen, c->autodev);
3625 }
3626
3627 static int get_config_signal_halt(const char *key, char *retv, int inlen,
3628 struct lxc_conf *c, void *data)
3629 {
3630 return lxc_get_conf_int(c, retv, inlen, c->haltsignal);
3631 }
3632
3633 static int get_config_signal_reboot(const char *key, char *retv, int inlen,
3634 struct lxc_conf *c, void *data)
3635 {
3636 return lxc_get_conf_int(c, retv, inlen, c->rebootsignal);
3637 }
3638
3639 static int get_config_signal_stop(const char *key, char *retv, int inlen,
3640 struct lxc_conf *c, void *data)
3641 {
3642 return lxc_get_conf_int(c, retv, inlen, c->stopsignal);
3643 }
3644
3645 static int get_config_start(const char *key, char *retv, int inlen,
3646 struct lxc_conf *c, void *data)
3647 {
3648 if (strcmp(key + 10, "auto") == 0)
3649 return lxc_get_conf_int(c, retv, inlen, c->start_auto);
3650 else if (strcmp(key + 10, "delay") == 0)
3651 return lxc_get_conf_int(c, retv, inlen, c->start_delay);
3652 else if (strcmp(key + 10, "order") == 0)
3653 return lxc_get_conf_int(c, retv, inlen, c->start_order);
3654
3655 return -1;
3656 }
3657
3658 static int get_config_log_syslog(const char *key, char *retv, int inlen,
3659 struct lxc_conf *c, void *data)
3660 {
3661 return lxc_get_conf_str(retv, inlen, c->syslog);
3662 }
3663
3664 static int get_config_monitor(const char *key, char *retv, int inlen,
3665 struct lxc_conf *c, void *data)
3666 {
3667 return lxc_get_conf_int(c, retv, inlen, c->monitor_unshare);
3668 }
3669
3670 static int get_config_monitor_signal_pdeath(const char *key, char *retv,
3671 int inlen, struct lxc_conf *c,
3672 void *data)
3673 {
3674 return lxc_get_conf_int(c, retv, inlen, c->monitor_signal_pdeath);
3675 }
3676
3677 static int get_config_group(const char *key, char *retv, int inlen,
3678 struct lxc_conf *c, void *data)
3679 {
3680 int len, fulllen = 0;
3681 struct lxc_list *it;
3682
3683 if (!retv)
3684 inlen = 0;
3685 else
3686 memset(retv, 0, inlen);
3687
3688 lxc_list_for_each(it, &c->groups) {
3689 strprint(retv, inlen, "%s\n", (char *)it->elem);
3690 }
3691
3692 return fulllen;
3693 }
3694
3695 static int get_config_environment(const char *key, char *retv, int inlen,
3696 struct lxc_conf *c, void *data)
3697 {
3698 int len, fulllen = 0;
3699 struct lxc_list *it;
3700
3701 if (!retv)
3702 inlen = 0;
3703 else
3704 memset(retv, 0, inlen);
3705
3706 lxc_list_for_each(it, &c->environment) {
3707 strprint(retv, inlen, "%s\n", (char *)it->elem);
3708 }
3709
3710 return fulllen;
3711 }
3712
3713 static int get_config_execute_cmd(const char *key, char *retv, int inlen,
3714 struct lxc_conf *c, void *data)
3715 {
3716 return lxc_get_conf_str(retv, inlen, c->execute_cmd);
3717 }
3718
3719 static int get_config_init_cmd(const char *key, char *retv, int inlen,
3720 struct lxc_conf *c, void *data)
3721 {
3722 return lxc_get_conf_str(retv, inlen, c->init_cmd);
3723 }
3724
3725 static int get_config_init_cwd(const char *key, char *retv, int inlen,
3726 struct lxc_conf *c, void *data)
3727 {
3728 return lxc_get_conf_str(retv, inlen, c->init_cwd);
3729 }
3730
3731 static int get_config_init_uid(const char *key, char *retv, int inlen,
3732 struct lxc_conf *c, void *data)
3733 {
3734 return lxc_get_conf_int(c, retv, inlen, c->init_uid);
3735 }
3736
3737 static int get_config_init_gid(const char *key, char *retv, int inlen,
3738 struct lxc_conf *c, void *data)
3739 {
3740 return lxc_get_conf_int(c, retv, inlen, c->init_gid);
3741 }
3742
3743 static int get_config_ephemeral(const char *key, char *retv, int inlen,
3744 struct lxc_conf *c, void *data)
3745 {
3746 return lxc_get_conf_int(c, retv, inlen, c->ephemeral);
3747 }
3748
3749 static int get_config_no_new_privs(const char *key, char *retv, int inlen,
3750 struct lxc_conf *c, void *data)
3751 {
3752 return lxc_get_conf_int(c, retv, inlen, c->no_new_privs);
3753 }
3754
3755 /* If you ask for a specific value, i.e. lxc.prlimit.nofile, then just the value
3756 * will be printed. If you ask for 'lxc.prlimit', then all limit entries will be
3757 * printed, in 'lxc.prlimit.resource = value' format.
3758 */
3759 static int get_config_prlimit(const char *key, char *retv, int inlen,
3760 struct lxc_conf *c, void *data)
3761 {
3762 int fulllen = 0, len;
3763 bool get_all = false;
3764 struct lxc_list *it;
3765
3766 if (!retv)
3767 inlen = 0;
3768 else
3769 memset(retv, 0, inlen);
3770
3771 if (!strcmp(key, "lxc.prlimit"))
3772 get_all = true;
3773 else if (strncmp(key, "lxc.prlimit.", 12) == 0)
3774 key += 12;
3775 else
3776 return -1;
3777
3778 lxc_list_for_each(it, &c->limits) {
3779 /* 2 colon separated 64 bit integers or the word 'unlimited' */
3780 char buf[INTTYPE_TO_STRLEN(uint64_t) * 2 + 2];
3781 int partlen;
3782 struct lxc_limit *lim = it->elem;
3783
3784 if (lim->limit.rlim_cur == RLIM_INFINITY) {
3785 memcpy(buf, "unlimited", STRLITERALLEN("unlimited") + 1);
3786 partlen = STRLITERALLEN("unlimited");
3787 } else {
3788 partlen = sprintf(buf, "%" PRIu64,
3789 (uint64_t)lim->limit.rlim_cur);
3790 }
3791
3792 if (lim->limit.rlim_cur != lim->limit.rlim_max) {
3793 if (lim->limit.rlim_max == RLIM_INFINITY)
3794 memcpy(buf + partlen, ":unlimited",
3795 STRLITERALLEN(":unlimited") + 1);
3796 else
3797 sprintf(buf + partlen, ":%" PRIu64,
3798 (uint64_t)lim->limit.rlim_max);
3799 }
3800
3801 if (get_all) {
3802 strprint(retv, inlen, "lxc.prlimit.%s = %s\n",
3803 lim->resource, buf);
3804 } else if (strcmp(lim->resource, key) == 0) {
3805 strprint(retv, inlen, "%s", buf);
3806 }
3807 }
3808
3809 return fulllen;
3810 }
3811
3812 /* If you ask for a specific value, i.e. lxc.sysctl.net.ipv4.ip_forward, then
3813 * just the value will be printed. If you ask for 'lxc.sysctl', then all sysctl
3814 * entries will be printed, in 'lxc.sysctl.key = value' format.
3815 */
3816 static int get_config_sysctl(const char *key, char *retv, int inlen,
3817 struct lxc_conf *c, void *data)
3818 {
3819 int len;
3820 struct lxc_list *it;
3821 int fulllen = 0;
3822 bool get_all = false;
3823
3824 if (!retv)
3825 inlen = 0;
3826 else
3827 memset(retv, 0, inlen);
3828
3829 if (strcmp(key, "lxc.sysctl") == 0)
3830 get_all = true;
3831 else if (strncmp(key, "lxc.sysctl.", STRLITERALLEN("lxc.sysctl.")) == 0)
3832 key += STRLITERALLEN("lxc.sysctl.");
3833 else
3834 return -1;
3835
3836 lxc_list_for_each(it, &c->sysctls) {
3837 struct lxc_sysctl *elem = it->elem;
3838 if (get_all) {
3839 strprint(retv, inlen, "lxc.sysctl.%s = %s\n", elem->key,
3840 elem->value);
3841 } else if (strcmp(elem->key, key) == 0) {
3842 strprint(retv, inlen, "%s", elem->value);
3843 }
3844 }
3845
3846 return fulllen;
3847 }
3848
3849 static int get_config_proc(const char *key, char *retv, int inlen,
3850 struct lxc_conf *c, void *data)
3851 {
3852 struct lxc_list *it;
3853 int len;
3854 int fulllen = 0;
3855 bool get_all = false;
3856
3857 if (!retv)
3858 inlen = 0;
3859 else
3860 memset(retv, 0, inlen);
3861
3862 if (strcmp(key, "lxc.proc") == 0)
3863 get_all = true;
3864 else if (strncmp(key, "lxc.proc.", STRLITERALLEN("lxc.proc.")) == 0)
3865 key += STRLITERALLEN("lxc.proc.");
3866 else
3867 return -1;
3868
3869 lxc_list_for_each(it, &c->procs) {
3870 struct lxc_proc *proc = it->elem;
3871
3872 if (get_all) {
3873 strprint(retv, inlen, "lxc.proc.%s = %s\n",
3874 proc->filename, proc->value);
3875 } else if (strcmp(proc->filename, key) == 0) {
3876 strprint(retv, inlen, "%s", proc->value);
3877 }
3878 }
3879
3880 return fulllen;
3881 }
3882
3883 static int get_config_namespace_clone(const char *key, char *retv, int inlen,
3884 struct lxc_conf *c, void *data)
3885 {
3886 int i, len;
3887 int fulllen = 0;
3888
3889 if (!retv)
3890 inlen = 0;
3891 else
3892 memset(retv, 0, inlen);
3893
3894 for (i = 0; i < LXC_NS_MAX; i++) {
3895 if (c->ns_clone & ns_info[i].clone_flag)
3896 strprint(retv, inlen, "%s\n", ns_info[i].proc_name);
3897 }
3898
3899 return fulllen;
3900 }
3901
3902 static int get_config_namespace_keep(const char *key, char *retv, int inlen,
3903 struct lxc_conf *c, void *data)
3904 {
3905 int i, len;
3906 int fulllen = 0;
3907
3908 if (!retv)
3909 inlen = 0;
3910 else
3911 memset(retv, 0, inlen);
3912
3913 for (i = 0; i < LXC_NS_MAX; i++) {
3914 if (c->ns_keep & ns_info[i].clone_flag)
3915 strprint(retv, inlen, "%s\n", ns_info[i].proc_name);
3916 }
3917
3918 return fulllen;
3919 }
3920
3921 static int get_config_namespace_share(const char *key, char *retv, int inlen,
3922 struct lxc_conf *c, void *data)
3923 {
3924 int len, ns_idx;
3925 const char *namespace;
3926 int fulllen = 0;
3927
3928 if (!retv)
3929 inlen = 0;
3930 else
3931 memset(retv, 0, inlen);
3932
3933 namespace = key + STRLITERALLEN("lxc.namespace.share.");
3934 ns_idx = lxc_namespace_2_ns_idx(namespace);
3935 if (ns_idx < 0)
3936 return ns_idx;
3937
3938 strprint(retv, inlen, "%s", c->ns_share[ns_idx]);
3939
3940 return fulllen;
3941 }
3942
3943 /* Callbacks to clear config items. */
3944 static inline int clr_config_personality(const char *key, struct lxc_conf *c,
3945 void *data)
3946 {
3947 c->personality = -1;
3948 return 0;
3949 }
3950
3951 static inline int clr_config_pty_max(const char *key, struct lxc_conf *c,
3952 void *data)
3953 {
3954 c->pty_max = 0;
3955 return 0;
3956 }
3957
3958 static inline int clr_config_tty_max(const char *key, struct lxc_conf *c,
3959 void *data)
3960 {
3961 c->ttys.tty = 0;
3962 return 0;
3963 }
3964
3965 static inline int clr_config_tty_dir(const char *key, struct lxc_conf *c,
3966 void *data)
3967 {
3968 free(c->ttys.dir);
3969 c->ttys.dir = NULL;
3970 return 0;
3971 }
3972
3973 static inline int clr_config_apparmor_profile(const char *key,
3974 struct lxc_conf *c, void *data)
3975 {
3976 free(c->lsm_aa_profile);
3977 c->lsm_aa_profile = NULL;
3978 return 0;
3979 }
3980
3981 static inline int clr_config_apparmor_allow_incomplete(const char *key,
3982 struct lxc_conf *c,
3983 void *data)
3984 {
3985 c->lsm_aa_allow_incomplete = 0;
3986 return 0;
3987 }
3988
3989 static inline int clr_config_apparmor_allow_nesting(const char *key,
3990 struct lxc_conf *c,
3991 void *data)
3992 {
3993 c->lsm_aa_allow_nesting = 0;
3994 return 0;
3995 }
3996
3997 static inline int clr_config_apparmor_raw(const char *key,
3998 struct lxc_conf *c,
3999 void *data)
4000 {
4001 return lxc_clear_apparmor_raw(c);
4002 }
4003
4004 static inline int clr_config_selinux_context(const char *key,
4005 struct lxc_conf *c, void *data)
4006 {
4007 free(c->lsm_se_context);
4008 c->lsm_se_context = NULL;
4009 return 0;
4010 }
4011
4012 static inline int clr_config_cgroup_controller(const char *key,
4013 struct lxc_conf *c, void *data)
4014 {
4015 return lxc_clear_cgroups(c, key, CGROUP_SUPER_MAGIC);
4016 }
4017
4018 static inline int clr_config_cgroup2_controller(const char *key,
4019 struct lxc_conf *c, void *data)
4020 {
4021 return lxc_clear_cgroups(c, key, CGROUP2_SUPER_MAGIC);
4022 }
4023
4024 static int clr_config_cgroup_dir(const char *key, struct lxc_conf *lxc_conf,
4025 void *data)
4026 {
4027 if (lxc_conf->cgroup_meta.dir) {
4028 free(lxc_conf->cgroup_meta.dir);
4029 lxc_conf->cgroup_meta.dir = NULL;
4030 }
4031
4032 return 0;
4033 }
4034
4035 static inline int clr_config_cgroup_relative(const char *key,
4036 struct lxc_conf *lxc_conf,
4037 void *data)
4038 {
4039 lxc_conf->cgroup_meta.relative = false;
4040 return 0;
4041 }
4042
4043 static inline int clr_config_idmaps(const char *key, struct lxc_conf *c,
4044 void *data)
4045 {
4046 return lxc_clear_idmaps(c);
4047 }
4048
4049 static inline int clr_config_log_level(const char *key, struct lxc_conf *c,
4050 void *data)
4051 {
4052 c->loglevel = LXC_LOG_LEVEL_NOTSET;
4053 return 0;
4054 }
4055
4056 static inline int clr_config_log_file(const char *key, struct lxc_conf *c,
4057 void *data)
4058 {
4059 free(c->logfile);
4060 c->logfile = NULL;
4061 return 0;
4062 }
4063
4064 static inline int clr_config_mount(const char *key, struct lxc_conf *c,
4065 void *data)
4066 {
4067 return lxc_clear_mount_entries(c);
4068 }
4069
4070 static inline int clr_config_mount_auto(const char *key, struct lxc_conf *c,
4071 void *data)
4072 {
4073 return lxc_clear_automounts(c);
4074 }
4075
4076 static inline int clr_config_mount_fstab(const char *key, struct lxc_conf *c,
4077 void *data)
4078 {
4079 free(c->fstab);
4080 c->fstab = NULL;
4081 return 0;
4082 }
4083
4084 static inline int clr_config_rootfs_path(const char *key, struct lxc_conf *c,
4085 void *data)
4086 {
4087 free(c->rootfs.path);
4088 c->rootfs.path = NULL;
4089 return 0;
4090 }
4091
4092 static inline int clr_config_rootfs_managed(const char *key, struct lxc_conf *c,
4093 void *data)
4094 {
4095 c->rootfs.managed = true;
4096 return 0;
4097 }
4098
4099 static inline int clr_config_rootfs_mount(const char *key, struct lxc_conf *c,
4100 void *data)
4101 {
4102 free(c->rootfs.mount);
4103 c->rootfs.mount = NULL;
4104 return 0;
4105 }
4106
4107 static inline int clr_config_rootfs_options(const char *key, struct lxc_conf *c,
4108 void *data)
4109 {
4110 free(c->rootfs.options);
4111 c->rootfs.options = NULL;
4112
4113 free(c->rootfs.data);
4114 c->rootfs.data = NULL;
4115
4116 return 0;
4117 }
4118
4119 static inline int clr_config_uts_name(const char *key, struct lxc_conf *c,
4120 void *data)
4121 {
4122 free(c->utsname);
4123 c->utsname = NULL;
4124 return 0;
4125 }
4126
4127 static inline int clr_config_hooks(const char *key, struct lxc_conf *c,
4128 void *data)
4129 {
4130 return lxc_clear_hooks(c, key);
4131 }
4132
4133 static inline int clr_config_hooks_version(const char *key, struct lxc_conf *c,
4134 void *data)
4135 {
4136 /* default to legacy hooks version */
4137 c->hooks_version = 0;
4138 return 0;
4139 }
4140
4141 static inline int clr_config_net(const char *key, struct lxc_conf *c,
4142 void *data)
4143 {
4144 lxc_free_networks(&c->network);
4145
4146 return 0;
4147 }
4148
4149 static inline int clr_config_cap_drop(const char *key, struct lxc_conf *c,
4150 void *data)
4151 {
4152 return lxc_clear_config_caps(c);
4153 }
4154
4155 static inline int clr_config_cap_keep(const char *key, struct lxc_conf *c,
4156 void *data)
4157 {
4158 return lxc_clear_config_keepcaps(c);
4159 }
4160
4161 static inline int clr_config_console_path(const char *key, struct lxc_conf *c,
4162 void *data)
4163 {
4164 free(c->console.path);
4165 c->console.path = NULL;
4166 return 0;
4167 }
4168
4169 static inline int clr_config_console_logfile(const char *key,
4170 struct lxc_conf *c, void *data)
4171 {
4172 free(c->console.log_path);
4173 c->console.log_path = NULL;
4174 return 0;
4175 }
4176
4177 static inline int clr_config_console_rotate(const char *key, struct lxc_conf *c,
4178 void *data)
4179 {
4180 c->console.log_rotate = 0;
4181 return 0;
4182 }
4183
4184 static inline int clr_config_console_buffer_size(const char *key,
4185 struct lxc_conf *c, void *data)
4186 {
4187 c->console.buffer_size = 0;
4188 return 0;
4189 }
4190
4191 static inline int clr_config_console_size(const char *key, struct lxc_conf *c,
4192 void *data)
4193 {
4194 c->console.log_size = 0;
4195 return 0;
4196 }
4197
4198 static inline int clr_config_seccomp_profile(const char *key,
4199 struct lxc_conf *c, void *data)
4200 {
4201 free(c->seccomp);
4202 c->seccomp = NULL;
4203 return 0;
4204 }
4205
4206 static inline int clr_config_autodev(const char *key, struct lxc_conf *c,
4207 void *data)
4208 {
4209 c->autodev = 1;
4210 return 0;
4211 }
4212
4213 static inline int clr_config_signal_halt(const char *key, struct lxc_conf *c,
4214 void *data)
4215 {
4216 c->haltsignal = 0;
4217 return 0;
4218 }
4219
4220 static inline int clr_config_signal_reboot(const char *key, struct lxc_conf *c,
4221 void *data)
4222 {
4223 c->rebootsignal = 0;
4224 return 0;
4225 }
4226
4227 static inline int clr_config_signal_stop(const char *key, struct lxc_conf *c,
4228 void *data)
4229 {
4230 c->stopsignal = 0;
4231 return 0;
4232 }
4233
4234 static inline int clr_config_start(const char *key, struct lxc_conf *c,
4235 void *data)
4236 {
4237 if (strcmp(key + 10, "auto") == 0)
4238 c->start_auto = 0;
4239 else if (strcmp(key + 10, "delay") == 0)
4240 c->start_delay = 0;
4241 else if (strcmp(key + 10, "order") == 0)
4242 c->start_order = 0;
4243
4244 return 0;
4245 }
4246
4247 static inline int clr_config_log_syslog(const char *key, struct lxc_conf *c,
4248 void *data)
4249 {
4250 free(c->syslog);
4251 c->syslog = NULL;
4252 return 0;
4253 }
4254
4255 static inline int clr_config_monitor(const char *key, struct lxc_conf *c,
4256 void *data)
4257 {
4258 c->monitor_unshare = 0;
4259 return 0;
4260 }
4261
4262 static inline int clr_config_monitor_signal_pdeath(const char *key,
4263 struct lxc_conf *c, void *data)
4264 {
4265 c->monitor_signal_pdeath = 0;
4266 return 0;
4267 }
4268
4269 static inline int clr_config_group(const char *key, struct lxc_conf *c,
4270 void *data)
4271 {
4272 return lxc_clear_groups(c);
4273 }
4274
4275 static inline int clr_config_environment(const char *key, struct lxc_conf *c,
4276 void *data)
4277 {
4278 return lxc_clear_environment(c);
4279 }
4280
4281 static inline int clr_config_execute_cmd(const char *key, struct lxc_conf *c,
4282 void *data)
4283 {
4284 free(c->execute_cmd);
4285 c->execute_cmd = NULL;
4286 return 0;
4287 }
4288
4289 static inline int clr_config_init_cmd(const char *key, struct lxc_conf *c,
4290 void *data)
4291 {
4292 free(c->init_cmd);
4293 c->init_cmd = NULL;
4294 return 0;
4295 }
4296
4297 static inline int clr_config_init_cwd(const char *key, struct lxc_conf *c,
4298 void *data)
4299 {
4300 free(c->init_cwd);
4301 c->init_cwd = NULL;
4302 return 0;
4303 }
4304
4305 static inline int clr_config_init_uid(const char *key, struct lxc_conf *c,
4306 void *data)
4307 {
4308 c->init_uid = 0;
4309 return 0;
4310 }
4311
4312 static inline int clr_config_init_gid(const char *key, struct lxc_conf *c,
4313 void *data)
4314 {
4315 c->init_gid = 0;
4316 return 0;
4317 }
4318
4319 static inline int clr_config_ephemeral(const char *key, struct lxc_conf *c,
4320 void *data)
4321 {
4322 c->ephemeral = 0;
4323 return 0;
4324 }
4325
4326 static inline int clr_config_no_new_privs(const char *key, struct lxc_conf *c,
4327 void *data)
4328 {
4329 c->no_new_privs = false;
4330 return 0;
4331 }
4332
4333 static inline int clr_config_prlimit(const char *key, struct lxc_conf *c,
4334 void *data)
4335 {
4336 return lxc_clear_limits(c, key);
4337 }
4338
4339 static inline int clr_config_sysctl(const char *key, struct lxc_conf *c,
4340 void *data)
4341 {
4342 return lxc_clear_sysctls(c, key);
4343 }
4344
4345 static inline int clr_config_proc(const char *key, struct lxc_conf *c,
4346 void *data)
4347 {
4348 return lxc_clear_procs(c, key);
4349 }
4350
4351 static inline int clr_config_includefiles(const char *key, struct lxc_conf *c,
4352 void *data)
4353 {
4354 lxc_clear_includes(c);
4355 return 0;
4356 }
4357
4358 static int clr_config_namespace_clone(const char *key,
4359 struct lxc_conf *lxc_conf, void *data)
4360 {
4361 lxc_conf->ns_clone = 0;
4362 return 0;
4363 }
4364
4365 static int clr_config_namespace_keep(const char *key, struct lxc_conf *lxc_conf,
4366 void *data)
4367 {
4368 lxc_conf->ns_keep = 0;
4369 return 0;
4370 }
4371
4372 static int clr_config_namespace_share(const char *key,
4373 struct lxc_conf *lxc_conf, void *data)
4374 {
4375 int ns_idx;
4376 const char *namespace;
4377
4378 namespace = key + STRLITERALLEN("lxc.namespace.share.");
4379 ns_idx = lxc_namespace_2_ns_idx(namespace);
4380 if (ns_idx < 0)
4381 return ns_idx;
4382
4383 free(lxc_conf->ns_share[ns_idx]);
4384 lxc_conf->ns_share[ns_idx] = NULL;
4385
4386 return 0;
4387 }
4388
4389 static int get_config_includefiles(const char *key, char *retv, int inlen,
4390 struct lxc_conf *c, void *data)
4391 {
4392 return -ENOSYS;
4393 }
4394
4395 static struct lxc_config_t *get_network_config_ops(const char *key,
4396 struct lxc_conf *lxc_conf,
4397 ssize_t *idx,
4398 char **deindexed_key)
4399 {
4400 int ret;
4401 unsigned int tmpidx;
4402 size_t numstrlen;
4403 char *copy, *idx_start, *idx_end;
4404 struct lxc_config_t *config = NULL;
4405
4406 /* check that this is a sensible network key */
4407 if (strncmp("lxc.net.", key, 8)) {
4408 ERROR("Invalid network configuration key \"%s\"", key);
4409 return NULL;
4410 }
4411
4412 copy = strdup(key);
4413 if (!copy) {
4414 ERROR("Failed to duplicate string \"%s\"", key);
4415 return NULL;
4416 }
4417
4418 /* lxc.net.<n> */
4419 if (!isdigit(*(key + 8))) {
4420 ERROR("Failed to detect digit in string \"%s\"", key + 8);
4421 goto on_error;
4422 }
4423
4424 /* beginning of index string */
4425 idx_start = (copy + 7);
4426 *idx_start = '\0';
4427
4428 /* end of index string */
4429 idx_end = strchr((copy + 8), '.');
4430 if (idx_end)
4431 *idx_end = '\0';
4432
4433 /* parse current index */
4434 ret = lxc_safe_uint((idx_start + 1), &tmpidx);
4435 if (ret < 0) {
4436 errno = -ret;
4437 SYSERROR("Failed to parse unsigned integer from string \"%s\"",
4438 idx_start + 1);
4439 *idx = ret;
4440 goto on_error;
4441 }
4442
4443 /* This, of course is utterly nonsensical on so many levels, but
4444 * better safe than sorry.
4445 * (Checking for INT_MAX here is intentional.)
4446 */
4447 if (tmpidx == INT_MAX) {
4448 SYSERROR("Number of configured networks would overflow the "
4449 "counter");
4450 goto on_error;
4451 }
4452 *idx = tmpidx;
4453
4454 numstrlen = strlen((idx_start + 1));
4455
4456 /* repair configuration key */
4457 *idx_start = '.';
4458
4459 /* lxc.net.<idx>.<subkey> */
4460 if (idx_end) {
4461 *idx_end = '.';
4462 if (strlen(idx_end + 1) == 0) {
4463 ERROR("No subkey in network configuration key \"%s\"", key);
4464 goto on_error;
4465 }
4466
4467 memmove(copy + 8, idx_end + 1, strlen(idx_end + 1));
4468 copy[strlen(key) - numstrlen + 1] = '\0';
4469
4470 config = lxc_get_config(copy);
4471 if (!config) {
4472 ERROR("Unknown network configuration key \"%s\"", key);
4473 goto on_error;
4474 }
4475 }
4476
4477 if (deindexed_key)
4478 *deindexed_key = copy;
4479
4480 return config;
4481
4482 on_error:
4483 free(copy);
4484 return NULL;
4485 }
4486
4487 /* Config entry is something like "lxc.net.0.ipv4" the key 'lxc.net.' was
4488 * found. So we make sure next comes an integer, find the right callback (by
4489 * rewriting the key), and call it.
4490 */
4491 static int set_config_net_nic(const char *key, const char *value,
4492 struct lxc_conf *lxc_conf, void *data)
4493 {
4494 int ret;
4495 const char *idxstring;
4496 struct lxc_config_t *config;
4497 struct lxc_netdev *netdev;
4498 ssize_t idx = -1;
4499 char *deindexed_key = NULL;
4500
4501 idxstring = key + 8;
4502 if (!isdigit(*idxstring))
4503 return -1;
4504
4505 if (lxc_config_value_empty(value))
4506 return clr_config_net_nic(key, lxc_conf, data);
4507
4508 config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key);
4509 if (!config || idx < 0)
4510 return -1;
4511
4512 netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, true);
4513 if (!netdev) {
4514 free(deindexed_key);
4515 return -1;
4516 }
4517
4518 ret = config->set(deindexed_key, value, lxc_conf, netdev);
4519 free(deindexed_key);
4520
4521 return ret;
4522 }
4523
4524 static int clr_config_net_nic(const char *key, struct lxc_conf *lxc_conf,
4525 void *data)
4526 {
4527 int ret;
4528 const char *idxstring;
4529 struct lxc_config_t *config;
4530 struct lxc_netdev *netdev;
4531 ssize_t idx = -1;
4532 char *deindexed_key = NULL;
4533
4534 idxstring = key + 8;
4535 if (!isdigit(*idxstring))
4536 return -1;
4537
4538 /* The left conjunct is pretty self-explanatory. The right conjunct
4539 * checks whether the two pointers are equal. If they are we know that
4540 * this is not a key that is namespaced any further and so we are
4541 * supposed to clear the whole network.
4542 */
4543 if (isdigit(*idxstring) && (strrchr(key, '.') == (idxstring - 1))) {
4544 unsigned int rmnetdevidx;
4545
4546 if (lxc_safe_uint(idxstring, &rmnetdevidx) < 0)
4547 return -1;
4548
4549 /* Remove network from network list. */
4550 lxc_remove_nic_by_idx(lxc_conf, rmnetdevidx);
4551 return 0;
4552 }
4553
4554 config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key);
4555 if (!config || idx < 0)
4556 return -1;
4557
4558 netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, false);
4559 if (!netdev) {
4560 free(deindexed_key);
4561 return -1;
4562 }
4563
4564 ret = config->clr(deindexed_key, lxc_conf, netdev);
4565 free(deindexed_key);
4566
4567 return ret;
4568 }
4569
4570 static int clr_config_net_type(const char *key, struct lxc_conf *lxc_conf,
4571 void *data)
4572 {
4573 struct lxc_netdev *netdev = data;
4574
4575 if (!netdev)
4576 return -1;
4577
4578 netdev->type = -1;
4579
4580 return 0;
4581 }
4582
4583 static int clr_config_net_name(const char *key, struct lxc_conf *lxc_conf,
4584 void *data)
4585 {
4586 struct lxc_netdev *netdev = data;
4587
4588 if (!netdev)
4589 return -1;
4590
4591 netdev->name[0] = '\0';
4592
4593 return 0;
4594 }
4595
4596 static int clr_config_net_flags(const char *key, struct lxc_conf *lxc_conf,
4597 void *data)
4598 {
4599 struct lxc_netdev *netdev = data;
4600
4601 if (!netdev)
4602 return -1;
4603
4604 netdev->flags = 0;
4605
4606 return 0;
4607 }
4608
4609 static int clr_config_net_link(const char *key, struct lxc_conf *lxc_conf,
4610 void *data)
4611 {
4612 struct lxc_netdev *netdev = data;
4613
4614 if (!netdev)
4615 return -1;
4616
4617 netdev->link[0] = '\0';
4618
4619 return 0;
4620 }
4621
4622 static int clr_config_net_macvlan_mode(const char *key,
4623 struct lxc_conf *lxc_conf, void *data)
4624 {
4625 struct lxc_netdev *netdev = data;
4626
4627 if (!netdev)
4628 return -1;
4629
4630 if (netdev->type != LXC_NET_MACVLAN)
4631 return 0;
4632
4633 netdev->priv.macvlan_attr.mode = -1;
4634
4635 return 0;
4636 }
4637
4638 static int clr_config_net_veth_pair(const char *key, struct lxc_conf *lxc_conf,
4639 void *data)
4640 {
4641 struct lxc_netdev *netdev = data;
4642
4643 if (!netdev)
4644 return -1;
4645
4646 netdev->priv.veth_attr.pair[0] = '\0';
4647
4648 return 0;
4649 }
4650
4651 static int clr_config_net_script_up(const char *key, struct lxc_conf *lxc_conf,
4652 void *data)
4653 {
4654 struct lxc_netdev *netdev = data;
4655
4656 if (!netdev)
4657 return -1;
4658
4659 free(netdev->upscript);
4660 netdev->upscript = NULL;
4661
4662 return 0;
4663 }
4664
4665 static int clr_config_net_script_down(const char *key,
4666 struct lxc_conf *lxc_conf, void *data)
4667 {
4668 struct lxc_netdev *netdev = data;
4669
4670 if (!netdev)
4671 return -1;
4672
4673 free(netdev->downscript);
4674 netdev->downscript = NULL;
4675
4676 return 0;
4677 }
4678
4679 static int clr_config_net_hwaddr(const char *key, struct lxc_conf *lxc_conf,
4680 void *data)
4681 {
4682 struct lxc_netdev *netdev = data;
4683
4684 if (!netdev)
4685 return -1;
4686
4687 free(netdev->hwaddr);
4688 netdev->hwaddr = NULL;
4689
4690 return 0;
4691 }
4692
4693 static int clr_config_net_mtu(const char *key, struct lxc_conf *lxc_conf,
4694 void *data)
4695 {
4696 struct lxc_netdev *netdev = data;
4697
4698 if (!netdev)
4699 return -1;
4700
4701 free(netdev->mtu);
4702 netdev->mtu = NULL;
4703
4704 return 0;
4705 }
4706
4707 static int clr_config_net_vlan_id(const char *key, struct lxc_conf *lxc_conf,
4708 void *data)
4709 {
4710 struct lxc_netdev *netdev = data;
4711
4712 if (!netdev)
4713 return -1;
4714
4715 netdev->priv.vlan_attr.vid = 0;
4716
4717 return 0;
4718 }
4719
4720 static int clr_config_net_ipv4_gateway(const char *key,
4721 struct lxc_conf *lxc_conf, void *data)
4722 {
4723 struct lxc_netdev *netdev = data;
4724
4725 if (!netdev)
4726 return -1;
4727
4728 free(netdev->ipv4_gateway);
4729 netdev->ipv4_gateway = NULL;
4730
4731 return 0;
4732 }
4733
4734 static int clr_config_net_ipv4_address(const char *key,
4735 struct lxc_conf *lxc_conf, void *data)
4736 {
4737 struct lxc_netdev *netdev = data;
4738 struct lxc_list *cur, *next;
4739
4740 if (!netdev)
4741 return -1;
4742
4743 lxc_list_for_each_safe(cur, &netdev->ipv4, next) {
4744 lxc_list_del(cur);
4745 free(cur->elem);
4746 free(cur);
4747 }
4748
4749 return 0;
4750 }
4751
4752 static int clr_config_net_ipv6_gateway(const char *key,
4753 struct lxc_conf *lxc_conf, void *data)
4754 {
4755 struct lxc_netdev *netdev = data;
4756
4757 if (!netdev)
4758 return -1;
4759
4760 free(netdev->ipv6_gateway);
4761 netdev->ipv6_gateway = NULL;
4762
4763 return 0;
4764 }
4765
4766 static int clr_config_net_ipv6_address(const char *key,
4767 struct lxc_conf *lxc_conf, void *data)
4768 {
4769 struct lxc_netdev *netdev = data;
4770 struct lxc_list *cur, *next;
4771
4772 if (!netdev)
4773 return -1;
4774
4775 lxc_list_for_each_safe(cur, &netdev->ipv6, next) {
4776 lxc_list_del(cur);
4777 free(cur->elem);
4778 free(cur);
4779 }
4780
4781 return 0;
4782 }
4783
4784 static int get_config_net_nic(const char *key, char *retv, int inlen,
4785 struct lxc_conf *c, void *data)
4786 {
4787 int ret;
4788 const char *idxstring;
4789 struct lxc_config_t *config;
4790 struct lxc_netdev *netdev;
4791 ssize_t idx = -1;
4792 char *deindexed_key = NULL;
4793
4794 idxstring = key + 8;
4795 if (!isdigit(*idxstring))
4796 return -1;
4797
4798 config = get_network_config_ops(key, c, &idx, &deindexed_key);
4799 if (!config || idx < 0)
4800 return -1;
4801
4802 netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false);
4803 if (!netdev) {
4804 free(deindexed_key);
4805 return -1;
4806 }
4807
4808 ret = config->get(deindexed_key, retv, inlen, c, netdev);
4809 free(deindexed_key);
4810
4811 return ret;
4812 }
4813
4814 static int get_config_net_type(const char *key, char *retv, int inlen,
4815 struct lxc_conf *c, void *data)
4816 {
4817 int len;
4818 int fulllen = 0;
4819 struct lxc_netdev *netdev = data;
4820
4821 if (!retv)
4822 inlen = 0;
4823 else
4824 memset(retv, 0, inlen);
4825
4826 if (!netdev)
4827 return -1;
4828
4829 strprint(retv, inlen, "%s", lxc_net_type_to_str(netdev->type));
4830
4831 return fulllen;
4832 }
4833
4834 static int get_config_net_flags(const char *key, char *retv, int inlen,
4835 struct lxc_conf *c, void *data)
4836 {
4837 int len;
4838 int fulllen = 0;
4839 struct lxc_netdev *netdev = data;
4840
4841 if (!retv)
4842 inlen = 0;
4843 else
4844 memset(retv, 0, inlen);
4845
4846 if (!netdev)
4847 return -1;
4848
4849 if (netdev->flags & IFF_UP)
4850 strprint(retv, inlen, "up");
4851
4852 return fulllen;
4853 }
4854
4855 static int get_config_net_link(const char *key, char *retv, int inlen,
4856 struct lxc_conf *c, void *data)
4857 {
4858 int len;
4859 int fulllen = 0;
4860 struct lxc_netdev *netdev = data;
4861
4862 if (!retv)
4863 inlen = 0;
4864 else
4865 memset(retv, 0, inlen);
4866
4867 if (!netdev)
4868 return -1;
4869
4870 if (netdev->link[0] != '\0')
4871 strprint(retv, inlen, "%s", netdev->link);
4872
4873 return fulllen;
4874 }
4875
4876 static int get_config_net_name(const char *key, char *retv, int inlen,
4877 struct lxc_conf *c, void *data)
4878 {
4879 int len;
4880 int fulllen = 0;
4881 struct lxc_netdev *netdev = data;
4882
4883 if (!retv)
4884 inlen = 0;
4885 else
4886 memset(retv, 0, inlen);
4887
4888 if (!netdev)
4889 return -1;
4890
4891 if (netdev->name[0] != '\0')
4892 strprint(retv, inlen, "%s", netdev->name);
4893
4894 return fulllen;
4895 }
4896
4897 static int get_config_net_macvlan_mode(const char *key, char *retv, int inlen,
4898 struct lxc_conf *c, void *data)
4899 {
4900 int len;
4901 int fulllen = 0;
4902 const char *mode;
4903 struct lxc_netdev *netdev = data;
4904
4905 if (!retv)
4906 inlen = 0;
4907 else
4908 memset(retv, 0, inlen);
4909
4910 if (!netdev)
4911 return -1;
4912
4913 if (netdev->type != LXC_NET_MACVLAN)
4914 return 0;
4915
4916 switch (netdev->priv.macvlan_attr.mode) {
4917 case MACVLAN_MODE_PRIVATE:
4918 mode = "private";
4919 break;
4920 case MACVLAN_MODE_VEPA:
4921 mode = "vepa";
4922 break;
4923 case MACVLAN_MODE_BRIDGE:
4924 mode = "bridge";
4925 break;
4926 case MACVLAN_MODE_PASSTHRU:
4927 mode = "passthru";
4928 break;
4929 default:
4930 mode = "(invalid)";
4931 break;
4932 }
4933
4934 strprint(retv, inlen, "%s", mode);
4935
4936 return fulllen;
4937 }
4938
4939 static int get_config_net_veth_pair(const char *key, char *retv, int inlen,
4940 struct lxc_conf *c, void *data)
4941 {
4942 int len;
4943 int fulllen = 0;
4944 struct lxc_netdev *netdev = data;
4945
4946 if (!retv)
4947 inlen = 0;
4948 else
4949 memset(retv, 0, inlen);
4950
4951 if (!netdev)
4952 return -1;
4953
4954 if (netdev->type != LXC_NET_VETH)
4955 return 0;
4956
4957 strprint(retv, inlen, "%s",
4958 netdev->priv.veth_attr.pair[0] != '\0'
4959 ? netdev->priv.veth_attr.pair
4960 : netdev->priv.veth_attr.veth1);
4961
4962 return fulllen;
4963 }
4964
4965 static int get_config_net_script_up(const char *key, char *retv, int inlen,
4966 struct lxc_conf *c, void *data)
4967 {
4968 int len;
4969 int fulllen = 0;
4970 struct lxc_netdev *netdev = data;
4971
4972 if (!retv)
4973 inlen = 0;
4974 else
4975 memset(retv, 0, inlen);
4976
4977 if (!netdev)
4978 return -1;
4979
4980 if (netdev->upscript)
4981 strprint(retv, inlen, "%s", netdev->upscript);
4982
4983 return fulllen;
4984 }
4985
4986 static int get_config_net_script_down(const char *key, char *retv, int inlen,
4987 struct lxc_conf *c, void *data)
4988 {
4989 int len;
4990 int fulllen = 0;
4991 struct lxc_netdev *netdev = data;
4992
4993 if (!retv)
4994 inlen = 0;
4995 else
4996 memset(retv, 0, inlen);
4997
4998 if (!netdev)
4999 return -1;
5000
5001 if (netdev->downscript)
5002 strprint(retv, inlen, "%s", netdev->downscript);
5003
5004 return fulllen;
5005 }
5006
5007 static int get_config_net_hwaddr(const char *key, char *retv, int inlen,
5008 struct lxc_conf *c, void *data)
5009 {
5010 int len;
5011 int fulllen = 0;
5012 struct lxc_netdev *netdev = data;
5013
5014 if (!retv)
5015 inlen = 0;
5016 else
5017 memset(retv, 0, inlen);
5018
5019 if (!netdev)
5020 return -1;
5021
5022 if (netdev->hwaddr)
5023 strprint(retv, inlen, "%s", netdev->hwaddr);
5024
5025 return fulllen;
5026 }
5027
5028 static int get_config_net_mtu(const char *key, char *retv, int inlen,
5029 struct lxc_conf *c, void *data)
5030 {
5031 int len;
5032 int fulllen = 0;
5033 struct lxc_netdev *netdev = data;
5034
5035 if (!retv)
5036 inlen = 0;
5037 else
5038 memset(retv, 0, inlen);
5039
5040 if (!netdev)
5041 return -1;
5042
5043 if (netdev->mtu)
5044 strprint(retv, inlen, "%s", netdev->mtu);
5045
5046 return fulllen;
5047 }
5048
5049 static int get_config_net_vlan_id(const char *key, char *retv, int inlen,
5050 struct lxc_conf *c, void *data)
5051 {
5052 int len;
5053 int fulllen = 0;
5054 struct lxc_netdev *netdev = data;
5055
5056 if (!retv)
5057 inlen = 0;
5058 else
5059 memset(retv, 0, inlen);
5060
5061 if (!netdev)
5062 return -1;
5063
5064 if (netdev->type != LXC_NET_VLAN)
5065 return 0;
5066
5067 strprint(retv, inlen, "%d", netdev->priv.vlan_attr.vid);
5068
5069 return fulllen;
5070 }
5071
5072 static int get_config_net_ipv4_gateway(const char *key, char *retv, int inlen,
5073 struct lxc_conf *c, void *data)
5074 {
5075 int len;
5076 char buf[INET_ADDRSTRLEN];
5077 int fulllen = 0;
5078 struct lxc_netdev *netdev = data;
5079
5080 if (!retv)
5081 inlen = 0;
5082 else
5083 memset(retv, 0, inlen);
5084
5085 if (!netdev)
5086 return -1;
5087
5088 if (netdev->ipv4_gateway_auto) {
5089 strprint(retv, inlen, "auto");
5090 } else if (netdev->ipv4_gateway) {
5091 inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf));
5092 strprint(retv, inlen, "%s", buf);
5093 }
5094
5095 return fulllen;
5096 }
5097
5098 static int get_config_net_ipv4_address(const char *key, char *retv, int inlen,
5099 struct lxc_conf *c, void *data)
5100 {
5101 int len;
5102 size_t listlen;
5103 char buf[INET_ADDRSTRLEN];
5104 struct lxc_list *it;
5105 int fulllen = 0;
5106 struct lxc_netdev *netdev = data;
5107
5108 if (!retv)
5109 inlen = 0;
5110 else
5111 memset(retv, 0, inlen);
5112
5113 if (!netdev)
5114 return -1;
5115
5116 listlen = lxc_list_len(&netdev->ipv4);
5117
5118 lxc_list_for_each(it, &netdev->ipv4) {
5119 struct lxc_inetdev *i = it->elem;
5120 inet_ntop(AF_INET, &i->addr, buf, sizeof(buf));
5121 strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
5122 (listlen-- > 1) ? "\n" : "");
5123 }
5124
5125 return fulllen;
5126 }
5127
5128 static int get_config_net_ipv6_gateway(const char *key, char *retv, int inlen,
5129 struct lxc_conf *c, void *data)
5130 {
5131 int len;
5132 char buf[INET6_ADDRSTRLEN];
5133 int fulllen = 0;
5134 struct lxc_netdev *netdev = data;
5135
5136 if (!retv)
5137 inlen = 0;
5138 else
5139 memset(retv, 0, inlen);
5140
5141 if (!netdev)
5142 return -1;
5143
5144 if (netdev->ipv6_gateway_auto) {
5145 strprint(retv, inlen, "auto");
5146 } else if (netdev->ipv6_gateway) {
5147 inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf));
5148 strprint(retv, inlen, "%s", buf);
5149 }
5150
5151 return fulllen;
5152 }
5153
5154 static int get_config_net_ipv6_address(const char *key, char *retv, int inlen,
5155 struct lxc_conf *c, void *data)
5156 {
5157 int len;
5158 size_t listlen;
5159 char buf[INET6_ADDRSTRLEN];
5160 struct lxc_list *it;
5161 int fulllen = 0;
5162 struct lxc_netdev *netdev = data;
5163
5164 if (!retv)
5165 inlen = 0;
5166 else
5167 memset(retv, 0, inlen);
5168
5169 if (!netdev)
5170 return -1;
5171
5172 listlen = lxc_list_len(&netdev->ipv6);
5173
5174 lxc_list_for_each(it, &netdev->ipv6) {
5175 struct lxc_inet6dev *i = it->elem;
5176 inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf));
5177 strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
5178 (listlen-- > 1) ? "\n" : "");
5179 }
5180
5181 return fulllen;
5182 }
5183
5184 int lxc_list_config_items(char *retv, int inlen)
5185 {
5186 size_t i;
5187 int len;
5188 int fulllen = 0;
5189
5190 if (!retv)
5191 inlen = 0;
5192 else
5193 memset(retv, 0, inlen);
5194
5195 for (i = 0; i < config_jump_table_size; i++) {
5196 char *s = config_jump_table[i].name;
5197
5198 if (s[strlen(s) - 1] == '.')
5199 continue;
5200
5201 strprint(retv, inlen, "%s\n", s);
5202 }
5203
5204 return fulllen;
5205 }
5206
5207 int lxc_list_subkeys(struct lxc_conf *conf, const char *key, char *retv,
5208 int inlen)
5209 {
5210 int len;
5211 int fulllen = 0;
5212
5213 if (!retv)
5214 inlen = 0;
5215 else
5216 memset(retv, 0, inlen);
5217
5218 if (!strcmp(key, "lxc.apparmor")) {
5219 strprint(retv, inlen, "allow_incomplete\n");
5220 strprint(retv, inlen, "allow_nesting\n");
5221 strprint(retv, inlen, "profile\n");
5222 strprint(retv, inlen, "raw\n");
5223 } else if (!strcmp(key, "lxc.cgroup")) {
5224 strprint(retv, inlen, "dir\n");
5225 } else if (!strcmp(key, "lxc.selinux")) {
5226 strprint(retv, inlen, "context\n");
5227 } else if (!strcmp(key, "lxc.mount")) {
5228 strprint(retv, inlen, "auto\n");
5229 strprint(retv, inlen, "entry\n");
5230 strprint(retv, inlen, "fstab\n");
5231 } else if (!strcmp(key, "lxc.rootfs")) {
5232 strprint(retv, inlen, "mount\n");
5233 strprint(retv, inlen, "options\n");
5234 strprint(retv, inlen, "path\n");
5235 } else if (!strcmp(key, "lxc.uts")) {
5236 strprint(retv, inlen, "name\n");
5237 } else if (!strcmp(key, "lxc.hook")) {
5238 strprint(retv, inlen, "autodev\n");
5239 strprint(retv, inlen, "clone\n");
5240 strprint(retv, inlen, "destroy\n");
5241 strprint(retv, inlen, "mount\n");
5242 strprint(retv, inlen, "post-stop\n");
5243 strprint(retv, inlen, "pre-mount\n");
5244 strprint(retv, inlen, "pre-start\n");
5245 strprint(retv, inlen, "start-host\n");
5246 strprint(retv, inlen, "start\n");
5247 strprint(retv, inlen, "stop\n");
5248 } else if (!strcmp(key, "lxc.cap")) {
5249 strprint(retv, inlen, "drop\n");
5250 strprint(retv, inlen, "keep\n");
5251 } else if (!strcmp(key, "lxc.console")) {
5252 strprint(retv, inlen, "logfile\n");
5253 strprint(retv, inlen, "path\n");
5254 } else if (!strcmp(key, "lxc.seccomp")) {
5255 strprint(retv, inlen, "profile\n");
5256 } else if (!strcmp(key, "lxc.signal")) {
5257 strprint(retv, inlen, "halt\n");
5258 strprint(retv, inlen, "reboot\n");
5259 strprint(retv, inlen, "stop\n");
5260 } else if (!strcmp(key, "lxc.start")) {
5261 strprint(retv, inlen, "auto\n");
5262 strprint(retv, inlen, "delay\n");
5263 strprint(retv, inlen, "order\n");
5264 } else if (!strcmp(key, "lxc.monitor")) {
5265 strprint(retv, inlen, "unshare\n");
5266 } else {
5267 fulllen = -1;
5268 }
5269
5270 return fulllen;
5271 }
5272
5273 int lxc_list_net(struct lxc_conf *c, const char *key, char *retv, int inlen)
5274 {
5275 int len;
5276 const char *idxstring;
5277 struct lxc_netdev *netdev;
5278 int fulllen = 0;
5279 ssize_t idx = -1;
5280
5281 idxstring = key + 8;
5282 if (!isdigit(*idxstring))
5283 return -1;
5284
5285 (void)get_network_config_ops(key, c, &idx, NULL);
5286 if (idx < 0)
5287 return -1;
5288
5289 netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false);
5290 if (!netdev)
5291 return -1;
5292
5293 if (!retv)
5294 inlen = 0;
5295 else
5296 memset(retv, 0, inlen);
5297
5298 strprint(retv, inlen, "type\n");
5299 strprint(retv, inlen, "script.up\n");
5300 strprint(retv, inlen, "script.down\n");
5301
5302 if (netdev->type != LXC_NET_EMPTY) {
5303 strprint(retv, inlen, "flags\n");
5304 strprint(retv, inlen, "link\n");
5305 strprint(retv, inlen, "name\n");
5306 strprint(retv, inlen, "hwaddr\n");
5307 strprint(retv, inlen, "mtu\n");
5308 strprint(retv, inlen, "ipv6.address\n");
5309 strprint(retv, inlen, "ipv6.gateway\n");
5310 strprint(retv, inlen, "ipv4.address\n");
5311 strprint(retv, inlen, "ipv4.gateway\n");
5312 }
5313
5314 switch (netdev->type) {
5315 case LXC_NET_VETH:
5316 strprint(retv, inlen, "veth.pair\n");
5317 break;
5318 case LXC_NET_MACVLAN:
5319 strprint(retv, inlen, "macvlan.mode\n");
5320 break;
5321 case LXC_NET_VLAN:
5322 strprint(retv, inlen, "vlan.id\n");
5323 break;
5324 case LXC_NET_PHYS:
5325 break;
5326 }
5327
5328 return fulllen;
5329 }
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