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[mirror_lxc.git] / src / lxc / confile.c
1 /*
2 * lxc: linux Container library
3 * (C) Copyright IBM Corp. 2007, 2008
4 *
5 * Authors:
6 * Daniel Lezcano <daniel.lezcano at free.fr>
7 * Serge Hallyn <serge@hallyn.com>
8 * Christian Brauner <christian.brauner@ubuntu.com>
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #define _GNU_SOURCE
26 #define __STDC_FORMAT_MACROS
27 #include <ctype.h>
28 #include <dirent.h>
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <inttypes.h>
32 #include <signal.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <syslog.h>
37 #include <time.h>
38 #include <unistd.h>
39 #include <arpa/inet.h>
40 #include <net/if.h>
41 #include <netinet/in.h>
42 #include <sys/param.h>
43 #include <sys/stat.h>
44 #include <sys/types.h>
45 #include <sys/utsname.h>
46
47 #include "conf.h"
48 #include "config.h"
49 #include "confile.h"
50 #include "confile_utils.h"
51 #include "log.h"
52 #include "lxcseccomp.h"
53 #include "network.h"
54 #include "parse.h"
55 #include "storage.h"
56 #include "utils.h"
57
58 #if HAVE_IFADDRS_H
59 #include <ifaddrs.h>
60 #else
61 #include <../include/ifaddrs.h>
62 #endif
63
64 #if HAVE_SYS_PERSONALITY_H
65 #include <sys/personality.h>
66 #endif
67
68 lxc_log_define(lxc_confile, lxc);
69
70 #define lxc_config_define(name) \
71 static int set_config_##name(const char *, const char *, \
72 struct lxc_conf *, void *); \
73 static int get_config_##name(const char *, char *, int, \
74 struct lxc_conf *, void *); \
75 static int clr_config_##name(const char *, struct lxc_conf *, void *);
76
77 lxc_config_define(autodev);
78 lxc_config_define(apparmor_allow_incomplete);
79 lxc_config_define(apparmor_profile);
80 lxc_config_define(cap_drop);
81 lxc_config_define(cap_keep);
82 lxc_config_define(cgroup_controller);
83 lxc_config_define(cgroup2_controller);
84 lxc_config_define(cgroup_dir);
85 lxc_config_define(console_logfile);
86 lxc_config_define(console_rotate);
87 lxc_config_define(console_buffer_logfile);
88 lxc_config_define(console_buffer_size);
89 lxc_config_define(console_path);
90 lxc_config_define(environment);
91 lxc_config_define(ephemeral);
92 lxc_config_define(execute_cmd);
93 lxc_config_define(group);
94 lxc_config_define(hooks);
95 lxc_config_define(hooks_version);
96 lxc_config_define(idmaps);
97 lxc_config_define(includefiles);
98 lxc_config_define(init_cmd);
99 lxc_config_define(init_cwd);
100 lxc_config_define(init_gid);
101 lxc_config_define(init_uid);
102 lxc_config_define(log_file);
103 lxc_config_define(log_level);
104 lxc_config_define(log_syslog);
105 lxc_config_define(monitor);
106 lxc_config_define(mount);
107 lxc_config_define(mount_auto);
108 lxc_config_define(mount_fstab);
109 lxc_config_define(namespace_clone);
110 lxc_config_define(namespace_keep);
111 lxc_config_define(namespace_share);
112 lxc_config_define(net);
113 lxc_config_define(net_flags);
114 lxc_config_define(net_hwaddr);
115 lxc_config_define(net_ipv4_address);
116 lxc_config_define(net_ipv4_gateway);
117 lxc_config_define(net_ipv6_address);
118 lxc_config_define(net_ipv6_gateway);
119 lxc_config_define(net_link);
120 lxc_config_define(net_macvlan_mode);
121 lxc_config_define(net_mtu);
122 lxc_config_define(net_name);
123 lxc_config_define(net_nic);
124 lxc_config_define(net_script_down);
125 lxc_config_define(net_script_up);
126 lxc_config_define(net_type);
127 lxc_config_define(net_veth_pair);
128 lxc_config_define(net_vlan_id);
129 lxc_config_define(no_new_privs);
130 lxc_config_define(personality);
131 lxc_config_define(prlimit);
132 lxc_config_define(pty_max);
133 lxc_config_define(rootfs_mount);
134 lxc_config_define(rootfs_options);
135 lxc_config_define(rootfs_path);
136 lxc_config_define(seccomp_profile);
137 lxc_config_define(selinux_context);
138 lxc_config_define(signal_halt);
139 lxc_config_define(signal_reboot);
140 lxc_config_define(signal_stop);
141 lxc_config_define(start);
142 lxc_config_define(tty_max);
143 lxc_config_define(tty_dir);
144 lxc_config_define(uts_name);
145 lxc_config_define(sysctl);
146 lxc_config_define(proc);
147
148 static struct lxc_config_t config[] = {
149 { "lxc.arch", set_config_personality, get_config_personality, clr_config_personality, },
150 { "lxc.apparmor.profile", set_config_apparmor_profile, get_config_apparmor_profile, clr_config_apparmor_profile, },
151 { "lxc.apparmor.allow_incomplete", set_config_apparmor_allow_incomplete, get_config_apparmor_allow_incomplete, clr_config_apparmor_allow_incomplete, },
152 { "lxc.autodev", set_config_autodev, get_config_autodev, clr_config_autodev, },
153 { "lxc.cap.drop", set_config_cap_drop, get_config_cap_drop, clr_config_cap_drop, },
154 { "lxc.cap.keep", set_config_cap_keep, get_config_cap_keep, clr_config_cap_keep, },
155 { "lxc.cgroup2", set_config_cgroup2_controller, get_config_cgroup2_controller, clr_config_cgroup2_controller, },
156 { "lxc.cgroup.dir", set_config_cgroup_dir, get_config_cgroup_dir, clr_config_cgroup_dir, },
157 { "lxc.cgroup", set_config_cgroup_controller, get_config_cgroup_controller, clr_config_cgroup_controller, },
158 { "lxc.console.buffer.logfile", set_config_console_buffer_logfile, get_config_console_buffer_logfile, clr_config_console_buffer_logfile, },
159 { "lxc.console.buffer.size", set_config_console_buffer_size, get_config_console_buffer_size, clr_config_console_buffer_size, },
160 { "lxc.console.logfile", set_config_console_logfile, get_config_console_logfile, clr_config_console_logfile, },
161 { "lxc.console.path", set_config_console_path, get_config_console_path, clr_config_console_path, },
162 { "lxc.console.rotate", set_config_console_rotate, get_config_console_rotate, clr_config_console_rotate, },
163 { "lxc.environment", set_config_environment, get_config_environment, clr_config_environment, },
164 { "lxc.ephemeral", set_config_ephemeral, get_config_ephemeral, clr_config_ephemeral, },
165 { "lxc.execute.cmd", set_config_execute_cmd, get_config_execute_cmd, clr_config_execute_cmd, },
166 { "lxc.group", set_config_group, get_config_group, clr_config_group, },
167 { "lxc.hook.autodev", set_config_hooks, get_config_hooks, clr_config_hooks, },
168 { "lxc.hook.clone", set_config_hooks, get_config_hooks, clr_config_hooks, },
169 { "lxc.hook.destroy", set_config_hooks, get_config_hooks, clr_config_hooks, },
170 { "lxc.hook.mount", set_config_hooks, get_config_hooks, clr_config_hooks, },
171 { "lxc.hook.post-stop", set_config_hooks, get_config_hooks, clr_config_hooks, },
172 { "lxc.hook.pre-mount", set_config_hooks, get_config_hooks, clr_config_hooks, },
173 { "lxc.hook.pre-start", set_config_hooks, get_config_hooks, clr_config_hooks, },
174 { "lxc.hook.start", set_config_hooks, get_config_hooks, clr_config_hooks, },
175 { "lxc.hook.start-host", set_config_hooks, get_config_hooks, clr_config_hooks, },
176 { "lxc.hook.stop", set_config_hooks, get_config_hooks, clr_config_hooks, },
177 { "lxc.hook.version", set_config_hooks_version, get_config_hooks_version, clr_config_hooks_version, },
178 { "lxc.hook", set_config_hooks, get_config_hooks, clr_config_hooks, },
179 { "lxc.idmap", set_config_idmaps, get_config_idmaps, clr_config_idmaps, },
180 { "lxc.include", set_config_includefiles, get_config_includefiles, clr_config_includefiles, },
181 { "lxc.init.cmd", set_config_init_cmd, get_config_init_cmd, clr_config_init_cmd, },
182 { "lxc.init.gid", set_config_init_gid, get_config_init_gid, clr_config_init_gid, },
183 { "lxc.init.uid", set_config_init_uid, get_config_init_uid, clr_config_init_uid, },
184 { "lxc.init.cwd", set_config_init_cwd, get_config_init_cwd, clr_config_init_cwd, },
185 { "lxc.log.file", set_config_log_file, get_config_log_file, clr_config_log_file, },
186 { "lxc.log.level", set_config_log_level, get_config_log_level, clr_config_log_level, },
187 { "lxc.log.syslog", set_config_log_syslog, get_config_log_syslog, clr_config_log_syslog, },
188 { "lxc.monitor.unshare", set_config_monitor, get_config_monitor, clr_config_monitor, },
189 { "lxc.mount.auto", set_config_mount_auto, get_config_mount_auto, clr_config_mount_auto, },
190 { "lxc.mount.entry", set_config_mount, get_config_mount, clr_config_mount, },
191 { "lxc.mount.fstab", set_config_mount_fstab, get_config_mount_fstab, clr_config_mount_fstab, },
192 { "lxc.namespace.clone", set_config_namespace_clone, get_config_namespace_clone, clr_config_namespace_clone, },
193 { "lxc.namespace.keep", set_config_namespace_keep, get_config_namespace_keep, clr_config_namespace_keep, },
194 { "lxc.namespace.share", set_config_namespace_share, get_config_namespace_share, clr_config_namespace_share, },
195 { "lxc.net.flags", set_config_net_flags, get_config_net_flags, clr_config_net_flags, },
196 { "lxc.net.hwaddr", set_config_net_hwaddr, get_config_net_hwaddr, clr_config_net_hwaddr, },
197 { "lxc.net.ipv4.address", set_config_net_ipv4_address, get_config_net_ipv4_address, clr_config_net_ipv4_address, },
198 { "lxc.net.ipv4.gateway", set_config_net_ipv4_gateway, get_config_net_ipv4_gateway, clr_config_net_ipv4_gateway, },
199 { "lxc.net.ipv6.address", set_config_net_ipv6_address, get_config_net_ipv6_address, clr_config_net_ipv6_address, },
200 { "lxc.net.ipv6.gateway", set_config_net_ipv6_gateway, get_config_net_ipv6_gateway, clr_config_net_ipv6_gateway, },
201 { "lxc.net.link", set_config_net_link, get_config_net_link, clr_config_net_link, },
202 { "lxc.net.macvlan.mode", set_config_net_macvlan_mode, get_config_net_macvlan_mode, clr_config_net_macvlan_mode, },
203 { "lxc.net.mtu", set_config_net_mtu, get_config_net_mtu, clr_config_net_mtu, },
204 { "lxc.net.name", set_config_net_name, get_config_net_name, clr_config_net_name, },
205 { "lxc.net.script.down", set_config_net_script_down, get_config_net_script_down, clr_config_net_script_down, },
206 { "lxc.net.script.up", set_config_net_script_up, get_config_net_script_up, clr_config_net_script_up, },
207 { "lxc.net.type", set_config_net_type, get_config_net_type, clr_config_net_type, },
208 { "lxc.net.vlan.id", set_config_net_vlan_id, get_config_net_vlan_id, clr_config_net_vlan_id, },
209 { "lxc.net.veth.pair", set_config_net_veth_pair, get_config_net_veth_pair, clr_config_net_veth_pair, },
210 { "lxc.net.", set_config_net_nic, get_config_net_nic, clr_config_net_nic, },
211 { "lxc.net", set_config_net, get_config_net, clr_config_net, },
212 { "lxc.no_new_privs", set_config_no_new_privs, get_config_no_new_privs, clr_config_no_new_privs, },
213 { "lxc.prlimit", set_config_prlimit, get_config_prlimit, clr_config_prlimit, },
214 { "lxc.pty.max", set_config_pty_max, get_config_pty_max, clr_config_pty_max, },
215 { "lxc.rootfs.mount", set_config_rootfs_mount, get_config_rootfs_mount, clr_config_rootfs_mount, },
216 { "lxc.rootfs.options", set_config_rootfs_options, get_config_rootfs_options, clr_config_rootfs_options, },
217 { "lxc.rootfs.path", set_config_rootfs_path, get_config_rootfs_path, clr_config_rootfs_path, },
218 { "lxc.seccomp.profile", set_config_seccomp_profile, get_config_seccomp_profile, clr_config_seccomp_profile, },
219 { "lxc.selinux.context", set_config_selinux_context, get_config_selinux_context, clr_config_selinux_context, },
220 { "lxc.signal.halt", set_config_signal_halt, get_config_signal_halt, clr_config_signal_halt, },
221 { "lxc.signal.reboot", set_config_signal_reboot, get_config_signal_reboot, clr_config_signal_reboot, },
222 { "lxc.signal.stop", set_config_signal_stop, get_config_signal_stop, clr_config_signal_stop, },
223 { "lxc.start.auto", set_config_start, get_config_start, clr_config_start, },
224 { "lxc.start.delay", set_config_start, get_config_start, clr_config_start, },
225 { "lxc.start.order", set_config_start, get_config_start, clr_config_start, },
226 { "lxc.tty.dir", set_config_tty_dir, get_config_tty_dir, clr_config_tty_dir, },
227 { "lxc.tty.max", set_config_tty_max, get_config_tty_max, clr_config_tty_max, },
228 { "lxc.uts.name", set_config_uts_name, get_config_uts_name, clr_config_uts_name, },
229 { "lxc.sysctl", set_config_sysctl, get_config_sysctl, clr_config_sysctl, },
230 { "lxc.proc", set_config_proc, get_config_proc, clr_config_proc, },
231 };
232
233 struct signame {
234 int num;
235 const char *name;
236 };
237
238 static const struct signame signames[] = {
239 { SIGHUP, "HUP" },
240 { SIGINT, "INT" },
241 { SIGQUIT, "QUIT" },
242 { SIGILL, "ILL" },
243 { SIGABRT, "ABRT" },
244 { SIGFPE, "FPE" },
245 { SIGKILL, "KILL" },
246 { SIGSEGV, "SEGV" },
247 { SIGPIPE, "PIPE" },
248 { SIGALRM, "ALRM" },
249 { SIGTERM, "TERM" },
250 { SIGUSR1, "USR1" },
251 { SIGUSR2, "USR2" },
252 { SIGCHLD, "CHLD" },
253 { SIGCONT, "CONT" },
254 { SIGSTOP, "STOP" },
255 { SIGTSTP, "TSTP" },
256 { SIGTTIN, "TTIN" },
257 { SIGTTOU, "TTOU" },
258 #ifdef SIGTRAP
259 { SIGTRAP, "TRAP" },
260 #endif
261 #ifdef SIGIOT
262 { SIGIOT, "IOT" },
263 #endif
264 #ifdef SIGEMT
265 { SIGEMT, "EMT" },
266 #endif
267 #ifdef SIGBUS
268 { SIGBUS, "BUS" },
269 #endif
270 #ifdef SIGSTKFLT
271 { SIGSTKFLT, "STKFLT" },
272 #endif
273 #ifdef SIGCLD
274 { SIGCLD, "CLD" },
275 #endif
276 #ifdef SIGURG
277 { SIGURG, "URG" },
278 #endif
279 #ifdef SIGXCPU
280 { SIGXCPU, "XCPU" },
281 #endif
282 #ifdef SIGXFSZ
283 { SIGXFSZ, "XFSZ" },
284 #endif
285 #ifdef SIGVTALRM
286 { SIGVTALRM, "VTALRM" },
287 #endif
288 #ifdef SIGPROF
289 { SIGPROF, "PROF" },
290 #endif
291 #ifdef SIGWINCH
292 { SIGWINCH, "WINCH" },
293 #endif
294 #ifdef SIGIO
295 { SIGIO, "IO" },
296 #endif
297 #ifdef SIGPOLL
298 { SIGPOLL, "POLL" },
299 #endif
300 #ifdef SIGINFO
301 { SIGINFO, "INFO" },
302 #endif
303 #ifdef SIGLOST
304 { SIGLOST, "LOST" },
305 #endif
306 #ifdef SIGPWR
307 { SIGPWR, "PWR" },
308 #endif
309 #ifdef SIGUNUSED
310 { SIGUNUSED, "UNUSED" },
311 #endif
312 #ifdef SIGSYS
313 { SIGSYS, "SYS" },
314 #endif
315 };
316
317 static const size_t config_size = sizeof(config) / sizeof(struct lxc_config_t);
318
319 struct lxc_config_t *lxc_get_config(const char *key)
320 {
321 size_t i;
322
323 for (i = 0; i < config_size; i++)
324 if (!strncmp(config[i].name, key, strlen(config[i].name)))
325 return &config[i];
326
327 return NULL;
328 }
329
330 static int set_config_net(const char *key, const char *value,
331 struct lxc_conf *lxc_conf, void *data)
332 {
333 if (!lxc_config_value_empty(value)) {
334 ERROR("lxc.net must not have a value");
335 return -1;
336 }
337
338 return clr_config_net(key, lxc_conf, data);
339 }
340
341 static int set_config_net_type(const char *key, const char *value,
342 struct lxc_conf *lxc_conf, void *data)
343 {
344 struct lxc_netdev *netdev = data;
345
346 if (lxc_config_value_empty(value))
347 return clr_config_net_type(key, lxc_conf, data);
348
349 if (!netdev)
350 return -1;
351
352 if (!strcmp(value, "veth")) {
353 netdev->type = LXC_NET_VETH;
354 } else if (!strcmp(value, "macvlan")) {
355 netdev->type = LXC_NET_MACVLAN;
356 lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode,
357 "private");
358 } else if (!strcmp(value, "vlan")) {
359 netdev->type = LXC_NET_VLAN;
360 } else if (!strcmp(value, "phys")) {
361 netdev->type = LXC_NET_PHYS;
362 } else if (!strcmp(value, "empty")) {
363 netdev->type = LXC_NET_EMPTY;
364 } else if (!strcmp(value, "none")) {
365 netdev->type = LXC_NET_NONE;
366 } else {
367 ERROR("invalid network type %s", value);
368 return -1;
369 }
370
371 return 0;
372 }
373
374 static int set_config_net_flags(const char *key, const char *value,
375 struct lxc_conf *lxc_conf, void *data)
376 {
377 struct lxc_netdev *netdev = data;
378
379 if (lxc_config_value_empty(value))
380 return clr_config_net_flags(key, lxc_conf, data);
381
382 if (!netdev)
383 return -1;
384
385 netdev->flags |= IFF_UP;
386
387 return 0;
388 }
389
390 static int create_matched_ifnames(const char *value, struct lxc_conf *lxc_conf,
391 struct lxc_netdev *netdev)
392 {
393 struct ifaddrs *ifaddr, *ifa;
394 int n;
395 int ret = 0;
396 const char *type_key = "lxc.net.type";
397 const char *link_key = "lxc.net.link";
398 const char *tmpvalue = "phys";
399
400 if (getifaddrs(&ifaddr) == -1) {
401 SYSERROR("Get network interfaces failed");
402 return -1;
403 }
404
405 for (ifa = ifaddr, n = 0; ifa != NULL; ifa = ifa->ifa_next, n++) {
406 if (!ifa->ifa_addr)
407 continue;
408 if (ifa->ifa_addr->sa_family != AF_PACKET)
409 continue;
410
411 if (!strncmp(value, ifa->ifa_name, strlen(value) - 1)) {
412 ret = set_config_net_type(type_key, tmpvalue, lxc_conf,
413 netdev);
414 if (!ret) {
415 ret = set_config_net_link(
416 link_key, ifa->ifa_name, lxc_conf, netdev);
417 if (ret) {
418 ERROR("failed to create matched ifnames");
419 break;
420 }
421 } else {
422 ERROR("failed to create matched ifnames");
423 break;
424 }
425 }
426 }
427
428 freeifaddrs(ifaddr);
429 ifaddr = NULL;
430
431 return ret;
432 }
433
434 static int set_config_net_link(const char *key, const char *value,
435 struct lxc_conf *lxc_conf, void *data)
436 {
437 struct lxc_netdev *netdev = data;
438 int ret = 0;
439
440 if (lxc_config_value_empty(value))
441 return clr_config_net_link(key, lxc_conf, data);
442
443 if (!netdev)
444 return -1;
445
446 if (value[strlen(value) - 1] == '+' && netdev->type == LXC_NET_PHYS)
447 ret = create_matched_ifnames(value, lxc_conf, netdev);
448 else
449 ret = network_ifname(netdev->link, value);
450
451 return ret;
452 }
453
454 static int set_config_net_name(const char *key, const char *value,
455 struct lxc_conf *lxc_conf, void *data)
456 {
457 struct lxc_netdev *netdev = data;
458
459 if (lxc_config_value_empty(value))
460 return clr_config_net_name(key, lxc_conf, data);
461
462 if (!netdev)
463 return -1;
464
465 return network_ifname(netdev->name, value);
466 }
467
468 static int set_config_net_veth_pair(const char *key, const char *value,
469 struct lxc_conf *lxc_conf, void *data)
470 {
471 struct lxc_netdev *netdev = data;
472
473 if (lxc_config_value_empty(value))
474 return clr_config_net_veth_pair(key, lxc_conf, data);
475
476 if (!netdev)
477 return -1;
478
479 return network_ifname(netdev->priv.veth_attr.pair, value);
480 }
481
482 static int set_config_net_macvlan_mode(const char *key, const char *value,
483 struct lxc_conf *lxc_conf, void *data)
484 {
485 struct lxc_netdev *netdev = data;
486
487 if (lxc_config_value_empty(value))
488 return clr_config_net_macvlan_mode(key, lxc_conf, data);
489
490 if (!netdev)
491 return -1;
492
493 return lxc_macvlan_mode_to_flag(&netdev->priv.macvlan_attr.mode, value);
494 }
495
496 static int set_config_net_hwaddr(const char *key, const char *value,
497 struct lxc_conf *lxc_conf, void *data)
498 {
499 struct lxc_netdev *netdev = data;
500 char *new_value;
501
502 if (lxc_config_value_empty(value))
503 return clr_config_net_hwaddr(key, lxc_conf, data);
504
505 if (!netdev)
506 return -1;
507
508 new_value = strdup(value);
509 if (!new_value)
510 return -1;
511
512 rand_complete_hwaddr(new_value);
513
514 if (lxc_config_value_empty(new_value)) {
515 free(new_value);
516 netdev->hwaddr = NULL;
517 return 0;
518 }
519
520 netdev->hwaddr = new_value;
521 return 0;
522 }
523
524 static int set_config_net_vlan_id(const char *key, const char *value,
525 struct lxc_conf *lxc_conf, void *data)
526 {
527 int ret;
528 struct lxc_netdev *netdev = data;
529
530 if (lxc_config_value_empty(value))
531 return clr_config_net_vlan_id(key, lxc_conf, data);
532
533 if (!netdev)
534 return -1;
535
536 ret = get_u16(&netdev->priv.vlan_attr.vid, value, 0);
537 if (ret < 0)
538 return -1;
539
540 return 0;
541 }
542
543 static int set_config_net_mtu(const char *key, const char *value,
544 struct lxc_conf *lxc_conf, void *data)
545 {
546 struct lxc_netdev *netdev = data;
547
548 if (lxc_config_value_empty(value))
549 return clr_config_net_mtu(key, lxc_conf, data);
550
551 if (!netdev)
552 return -1;
553
554 return set_config_string_item(&netdev->mtu, value);
555 }
556
557 static int set_config_net_ipv4_address(const char *key, const char *value,
558 struct lxc_conf *lxc_conf, void *data)
559 {
560 int ret;
561 struct lxc_netdev *netdev = data;
562 struct lxc_inetdev *inetdev;
563 struct lxc_list *list;
564 char *cursor, *slash;
565 char *addr = NULL, *bcast = NULL, *prefix = NULL;
566
567 if (lxc_config_value_empty(value))
568 return clr_config_net_ipv4_address(key, lxc_conf, data);
569
570 if (!netdev)
571 return -1;
572
573 inetdev = malloc(sizeof(*inetdev));
574 if (!inetdev)
575 return -1;
576
577 memset(inetdev, 0, sizeof(*inetdev));
578
579 list = malloc(sizeof(*list));
580 if (!list) {
581 free(inetdev);
582 return -1;
583 }
584
585 lxc_list_init(list);
586 list->elem = inetdev;
587
588 addr = strdup(value);
589 if (!addr) {
590 free(inetdev);
591 free(list);
592 return -1;
593 }
594
595 cursor = strstr(addr, " ");
596 if (cursor) {
597 *cursor = '\0';
598 bcast = cursor + 1;
599 }
600
601 slash = strstr(addr, "/");
602 if (slash) {
603 *slash = '\0';
604 prefix = slash + 1;
605 }
606
607 ret = inet_pton(AF_INET, addr, &inetdev->addr);
608 if (!ret || ret < 0) {
609 SYSERROR("Invalid ipv4 address \"%s\"", value);
610 free(inetdev);
611 free(addr);
612 free(list);
613 return -1;
614 }
615
616 if (bcast) {
617 ret = inet_pton(AF_INET, bcast, &inetdev->bcast);
618 if (!ret || ret < 0) {
619 SYSERROR("Invalid ipv4 broadcast address \"%s\"", value);
620 free(inetdev);
621 free(list);
622 free(addr);
623 return -1;
624 }
625
626 }
627
628 /* No prefix specified, determine it from the network class. */
629 if (prefix) {
630 ret = lxc_safe_uint(prefix, &inetdev->prefix);
631 if (ret < 0)
632 return -1;
633 } else {
634 inetdev->prefix = config_ip_prefix(&inetdev->addr);
635 }
636
637 /* If no broadcast address, let compute one from the
638 * prefix and address.
639 */
640 if (!bcast) {
641 inetdev->bcast.s_addr = inetdev->addr.s_addr;
642 inetdev->bcast.s_addr |= htonl(INADDR_BROADCAST >> inetdev->prefix);
643 }
644
645 lxc_list_add_tail(&netdev->ipv4, list);
646
647 free(addr);
648 return 0;
649 }
650
651 static int set_config_net_ipv4_gateway(const char *key, const char *value,
652 struct lxc_conf *lxc_conf, void *data)
653 {
654 struct lxc_netdev *netdev = data;
655
656 if (lxc_config_value_empty(value))
657 return clr_config_net_ipv4_gateway(key, lxc_conf, data);
658
659 if (!netdev)
660 return -1;
661
662 free(netdev->ipv4_gateway);
663
664 if (!strcmp(value, "auto")) {
665 netdev->ipv4_gateway = NULL;
666 netdev->ipv4_gateway_auto = true;
667 } else {
668 int ret;
669 struct in_addr *gw;
670
671 gw = malloc(sizeof(*gw));
672 if (!gw)
673 return -1;
674
675 ret = inet_pton(AF_INET, value, gw);
676 if (!ret || ret < 0) {
677 SYSERROR("Invalid ipv4 gateway address \"%s\"", value);
678 free(gw);
679 return -1;
680 }
681
682 netdev->ipv4_gateway = gw;
683 netdev->ipv4_gateway_auto = false;
684 }
685
686 return 0;
687 }
688
689 static int set_config_net_ipv6_address(const char *key, const char *value,
690 struct lxc_conf *lxc_conf, void *data)
691 {
692 int ret;
693 struct lxc_netdev *netdev = data;
694 struct lxc_inet6dev *inet6dev;
695 struct lxc_list *list;
696 char *slash, *valdup, *netmask;
697
698 if (lxc_config_value_empty(value))
699 return clr_config_net_ipv6_address(key, lxc_conf, data);
700
701 if (!netdev)
702 return -1;
703
704 inet6dev = malloc(sizeof(*inet6dev));
705 if (!inet6dev)
706 return -1;
707
708 memset(inet6dev, 0, sizeof(*inet6dev));
709
710 list = malloc(sizeof(*list));
711 if (!list) {
712 free(inet6dev);
713 return -1;
714 }
715
716 lxc_list_init(list);
717 list->elem = inet6dev;
718
719 valdup = strdup(value);
720 if (!valdup) {
721 free(list);
722 free(inet6dev);
723 return -1;
724 }
725
726 inet6dev->prefix = 64;
727 slash = strstr(valdup, "/");
728 if (slash) {
729 *slash = '\0';
730 netmask = slash + 1;
731 ret = lxc_safe_uint(netmask, &inet6dev->prefix);
732 if (ret < 0) {
733 free(list);
734 free(inet6dev);
735 free(valdup);
736 return -1;
737 }
738 }
739
740 ret = inet_pton(AF_INET6, valdup, &inet6dev->addr);
741 if (!ret || ret < 0) {
742 SYSERROR("Invalid ipv6 address \"%s\"", valdup);
743 free(list);
744 free(inet6dev);
745 free(valdup);
746 return -1;
747 }
748
749 lxc_list_add_tail(&netdev->ipv6, list);
750
751 free(valdup);
752 return 0;
753 }
754
755 static int set_config_net_ipv6_gateway(const char *key, const char *value,
756 struct lxc_conf *lxc_conf, void *data)
757 {
758 struct lxc_netdev *netdev = data;
759
760 if (lxc_config_value_empty(value))
761 return clr_config_net_ipv6_gateway(key, lxc_conf, data);
762
763 if (!netdev)
764 return -1;
765
766 free(netdev->ipv6_gateway);
767
768 if (!strcmp(value, "auto")) {
769 netdev->ipv6_gateway = NULL;
770 netdev->ipv6_gateway_auto = true;
771 } else {
772 int ret;
773 struct in6_addr *gw;
774
775 gw = malloc(sizeof(*gw));
776 if (!gw)
777 return -1;
778
779 ret = inet_pton(AF_INET6, value, gw);
780 if (!ret || ret < 0) {
781 SYSERROR("Invalid ipv6 gateway address \"%s\"", value);
782 free(gw);
783 return -1;
784 }
785
786 netdev->ipv6_gateway = gw;
787 netdev->ipv6_gateway_auto = false;
788 }
789
790 return 0;
791 }
792
793 static int set_config_net_script_up(const char *key, const char *value,
794 struct lxc_conf *lxc_conf, void *data)
795 {
796 struct lxc_netdev *netdev = data;
797
798 if (lxc_config_value_empty(value))
799 return clr_config_net_script_up(key, lxc_conf, data);
800
801 if (!netdev)
802 return -1;
803
804 return set_config_string_item(&netdev->upscript, value);
805 }
806
807 static int set_config_net_script_down(const char *key, const char *value,
808 struct lxc_conf *lxc_conf, void *data)
809 {
810 struct lxc_netdev *netdev = data;
811
812 if (lxc_config_value_empty(value))
813 return clr_config_net_script_down(key, lxc_conf, data);
814
815 if (!netdev)
816 return -1;
817
818 return set_config_string_item(&netdev->downscript, value);
819 }
820
821 static int add_hook(struct lxc_conf *lxc_conf, int which, char *hook)
822 {
823 struct lxc_list *hooklist;
824
825 hooklist = malloc(sizeof(*hooklist));
826 if (!hooklist) {
827 free(hook);
828 return -1;
829 }
830
831 hooklist->elem = hook;
832 lxc_list_add_tail(&lxc_conf->hooks[which], hooklist);
833 return 0;
834 }
835
836 static int set_config_seccomp_profile(const char *key, const char *value,
837 struct lxc_conf *lxc_conf, void *data)
838 {
839 return set_config_path_item(&lxc_conf->seccomp, value);
840 }
841
842 static int set_config_execute_cmd(const char *key, const char *value,
843 struct lxc_conf *lxc_conf, void *data)
844 {
845 return set_config_path_item(&lxc_conf->execute_cmd, value);
846 }
847
848 static int set_config_init_cmd(const char *key, const char *value,
849 struct lxc_conf *lxc_conf, void *data)
850 {
851 return set_config_path_item(&lxc_conf->init_cmd, value);
852 }
853
854 static int set_config_init_cwd(const char *key, const char *value,
855 struct lxc_conf *lxc_conf, void *data)
856 {
857 return set_config_path_item(&lxc_conf->init_cwd, value);
858 }
859
860 static int set_config_init_uid(const char *key, const char *value,
861 struct lxc_conf *lxc_conf, void *data)
862 {
863 unsigned int init_uid;
864
865 if (lxc_config_value_empty(value)) {
866 lxc_conf->init_uid = 0;
867 return 0;
868 }
869
870 if (lxc_safe_uint(value, &init_uid) < 0)
871 return -1;
872
873 lxc_conf->init_uid = init_uid;
874
875 return 0;
876 }
877
878 static int set_config_init_gid(const char *key, const char *value,
879 struct lxc_conf *lxc_conf, void *data)
880 {
881 unsigned int init_gid;
882
883 if (lxc_config_value_empty(value)) {
884 lxc_conf->init_gid = 0;
885 return 0;
886 }
887
888 if (lxc_safe_uint(value, &init_gid) < 0)
889 return -1;
890
891 lxc_conf->init_gid = init_gid;
892
893 return 0;
894 }
895
896 static int set_config_hooks(const char *key, const char *value,
897 struct lxc_conf *lxc_conf, void *data)
898 {
899 char *copy;
900
901 if (lxc_config_value_empty(value))
902 return lxc_clear_hooks(lxc_conf, key);
903
904 if (strcmp(key + 4, "hook") == 0) {
905 ERROR("lxc.hook must not have a value");
906 return -1;
907 }
908
909 copy = strdup(value);
910 if (!copy)
911 return -1;
912
913 if (strcmp(key + 9, "pre-start") == 0)
914 return add_hook(lxc_conf, LXCHOOK_PRESTART, copy);
915 else if (strcmp(key + 9, "start-host") == 0)
916 return add_hook(lxc_conf, LXCHOOK_START_HOST, copy);
917 else if (strcmp(key + 9, "pre-mount") == 0)
918 return add_hook(lxc_conf, LXCHOOK_PREMOUNT, copy);
919 else if (strcmp(key + 9, "autodev") == 0)
920 return add_hook(lxc_conf, LXCHOOK_AUTODEV, copy);
921 else if (strcmp(key + 9, "mount") == 0)
922 return add_hook(lxc_conf, LXCHOOK_MOUNT, copy);
923 else if (strcmp(key + 9, "start") == 0)
924 return add_hook(lxc_conf, LXCHOOK_START, copy);
925 else if (strcmp(key + 9, "stop") == 0)
926 return add_hook(lxc_conf, LXCHOOK_STOP, copy);
927 else if (strcmp(key + 9, "post-stop") == 0)
928 return add_hook(lxc_conf, LXCHOOK_POSTSTOP, copy);
929 else if (strcmp(key + 9, "clone") == 0)
930 return add_hook(lxc_conf, LXCHOOK_CLONE, copy);
931 else if (strcmp(key + 9, "destroy") == 0)
932 return add_hook(lxc_conf, LXCHOOK_DESTROY, copy);
933
934 free(copy);
935 return -1;
936 }
937
938 static int set_config_hooks_version(const char *key, const char *value,
939 struct lxc_conf *lxc_conf, void *data)
940 {
941 int ret;
942 unsigned int tmp;
943
944 if (lxc_config_value_empty(value))
945 return clr_config_hooks_version(key, lxc_conf, NULL);
946
947 ret = lxc_safe_uint(value, &tmp);
948 if (ret < 0)
949 return -1;
950
951 if (tmp > 1) {
952 ERROR("Invalid hook version specified. Currently only 0 "
953 "(legacy) and 1 are supported");
954 return -1;
955 }
956
957 lxc_conf->hooks_version = tmp;
958 return 0;
959 }
960
961 static int set_config_personality(const char *key, const char *value,
962 struct lxc_conf *lxc_conf, void *data)
963 {
964 signed long personality = lxc_config_parse_arch(value);
965
966 if (personality >= 0)
967 lxc_conf->personality = personality;
968 else
969 WARN("Unsupported personality \"%s\"", value);
970
971 return 0;
972 }
973
974 static int set_config_pty_max(const char *key, const char *value,
975 struct lxc_conf *lxc_conf, void *data)
976 {
977 if (lxc_config_value_empty(value)) {
978 lxc_conf->pts = 0;
979 return 0;
980 }
981
982 if (lxc_safe_uint(value, &lxc_conf->pts) < 0)
983 return -1;
984
985 return 0;
986 }
987
988 /* We only need to check whether the first byte of the key after the lxc.start.
989 * prefix matches our expectations since they fortunately all start with a
990 * different letter. If anything was wrong with the key we would have already
991 * noticed when the callback was called.
992 */
993 static int set_config_start(const char *key, const char *value,
994 struct lxc_conf *lxc_conf, void *data)
995 {
996 bool is_empty;
997
998 is_empty = lxc_config_value_empty(value);
999
1000 if (*(key + 10) == 'a') { /* lxc.start.auto */
1001 if (is_empty) {
1002 lxc_conf->start_auto = 0;
1003 return 0;
1004 }
1005
1006 if (lxc_safe_uint(value, &lxc_conf->start_auto) < 0)
1007 return -1;
1008
1009 if (lxc_conf->start_auto > 1)
1010 return -1;
1011
1012 return 0;
1013 } else if (*(key + 10) == 'd') { /* lxc.start.delay */
1014 if (is_empty) {
1015 lxc_conf->start_delay = 0;
1016 return 0;
1017 }
1018
1019 return lxc_safe_uint(value, &lxc_conf->start_delay);
1020 } else if (*(key + 10) == 'o') { /* lxc.start.order */
1021 if (is_empty) {
1022 lxc_conf->start_order = 0;
1023 return 0;
1024 }
1025
1026 return lxc_safe_int(value, &lxc_conf->start_order);
1027 }
1028
1029 return -1;
1030 }
1031
1032 static int set_config_monitor(const char *key, const char *value,
1033 struct lxc_conf *lxc_conf, void *data)
1034 {
1035 if (lxc_config_value_empty(value)) {
1036 lxc_conf->monitor_unshare = 0;
1037 return 0;
1038 }
1039
1040 if (strcmp(key + 12, "unshare") == 0)
1041 return lxc_safe_uint(value, &lxc_conf->monitor_unshare);
1042
1043 return -1;
1044 }
1045
1046 static int set_config_group(const char *key, const char *value,
1047 struct lxc_conf *lxc_conf, void *data)
1048 {
1049 char *groups, *groupptr, *sptr, *token;
1050 struct lxc_list *grouplist;
1051 int ret = -1;
1052
1053 if (lxc_config_value_empty(value))
1054 return lxc_clear_groups(lxc_conf);
1055
1056 groups = strdup(value);
1057 if (!groups)
1058 return -1;
1059
1060 /* In case several groups are specified in a single line split these
1061 * groups in a single element for the list.
1062 */
1063 for (groupptr = groups;; groupptr = NULL) {
1064 token = strtok_r(groupptr, " \t", &sptr);
1065 if (!token) {
1066 ret = 0;
1067 break;
1068 }
1069
1070 grouplist = malloc(sizeof(*grouplist));
1071 if (!grouplist)
1072 break;
1073
1074 grouplist->elem = strdup(token);
1075 if (!grouplist->elem) {
1076 free(grouplist);
1077 break;
1078 }
1079
1080 lxc_list_add_tail(&lxc_conf->groups, grouplist);
1081 }
1082
1083 free(groups);
1084 return ret;
1085 }
1086
1087 static int set_config_environment(const char *key, const char *value,
1088 struct lxc_conf *lxc_conf, void *data)
1089 {
1090 struct lxc_list *list_item = NULL;
1091
1092 if (lxc_config_value_empty(value))
1093 return lxc_clear_environment(lxc_conf);
1094
1095 list_item = malloc(sizeof(*list_item));
1096 if (!list_item)
1097 goto on_error;
1098
1099 list_item->elem = strdup(value);
1100
1101 if (!list_item->elem)
1102 goto on_error;
1103
1104 lxc_list_add_tail(&lxc_conf->environment, list_item);
1105
1106 return 0;
1107
1108 on_error:
1109 free(list_item);
1110 return -1;
1111 }
1112
1113 static int set_config_tty_max(const char *key, const char *value,
1114 struct lxc_conf *lxc_conf, void *data)
1115 {
1116 if (lxc_config_value_empty(value)) {
1117 lxc_conf->tty = 0;
1118 return 0;
1119 }
1120
1121 return lxc_safe_uint(value, &lxc_conf->tty);
1122 }
1123
1124 static int set_config_tty_dir(const char *key, const char *value,
1125 struct lxc_conf *lxc_conf, void *data)
1126 {
1127 return set_config_string_item_max(&lxc_conf->ttydir, value,
1128 NAME_MAX + 1);
1129 }
1130
1131 static int set_config_apparmor_profile(const char *key, const char *value,
1132 struct lxc_conf *lxc_conf, void *data)
1133 {
1134 return set_config_string_item(&lxc_conf->lsm_aa_profile, value);
1135 }
1136
1137 static int set_config_apparmor_allow_incomplete(const char *key,
1138 const char *value,
1139 struct lxc_conf *lxc_conf,
1140 void *data)
1141 {
1142 if (lxc_config_value_empty(value)) {
1143 lxc_conf->lsm_aa_allow_incomplete = 0;
1144 return 0;
1145 }
1146
1147 if (lxc_safe_uint(value, &lxc_conf->lsm_aa_allow_incomplete) < 0)
1148 return -1;
1149
1150 if (lxc_conf->lsm_aa_allow_incomplete > 1)
1151 return -1;
1152
1153 return 0;
1154 }
1155
1156 static int set_config_selinux_context(const char *key, const char *value,
1157 struct lxc_conf *lxc_conf, void *data)
1158 {
1159 return set_config_string_item(&lxc_conf->lsm_se_context, value);
1160 }
1161
1162 static int set_config_log_file(const char *key, const char *value,
1163 struct lxc_conf *c, void *data)
1164 {
1165 int ret;
1166
1167 if (lxc_config_value_empty(value)) {
1168 free(c->logfile);
1169 c->logfile = NULL;
1170 return 0;
1171 }
1172
1173 /* Store these values in the lxc_conf, and then try to set for actual
1174 * current logging.
1175 */
1176 ret = set_config_path_item(&c->logfile, value);
1177 if (ret == 0)
1178 ret = lxc_log_set_file(&c->logfd, c->logfile);
1179
1180 return ret;
1181 }
1182
1183 static int set_config_log_level(const char *key, const char *value,
1184 struct lxc_conf *lxc_conf, void *data)
1185 {
1186 int newlevel;
1187
1188 if (lxc_config_value_empty(value)) {
1189 lxc_conf->loglevel = LXC_LOG_LEVEL_NOTSET;
1190 return 0;
1191 }
1192
1193 if (value[0] >= '0' && value[0] <= '9') {
1194 if (lxc_safe_int(value, &newlevel) < 0)
1195 return -1;
1196 } else {
1197 newlevel = lxc_log_priority_to_int(value);
1198 }
1199
1200 /* Store these values in the lxc_conf, and then try to set for actual
1201 * current logging.
1202 */
1203 lxc_conf->loglevel = newlevel;
1204 return lxc_log_set_level(&lxc_conf->loglevel, newlevel);
1205 }
1206
1207 static int set_config_autodev(const char *key, const char *value,
1208 struct lxc_conf *lxc_conf, void *data)
1209 {
1210 if (lxc_config_value_empty(value)) {
1211 lxc_conf->autodev = 0;
1212 return 0;
1213 }
1214
1215 if (lxc_safe_uint(value, &lxc_conf->autodev) < 0)
1216 return -1;
1217
1218 if (lxc_conf->autodev > 1)
1219 return -1;
1220
1221 return 0;
1222 }
1223
1224 static int sig_num(const char *sig)
1225 {
1226 unsigned int signum;
1227
1228 if (lxc_safe_uint(sig, &signum) < 0)
1229 return -1;
1230
1231 return signum;
1232 }
1233
1234 static int rt_sig_num(const char *signame)
1235 {
1236 int rtmax = 0, sig_n = 0;
1237
1238 if (strncasecmp(signame, "max-", 4) == 0) {
1239 rtmax = 1;
1240 }
1241
1242 signame += 4;
1243 if (!isdigit(*signame))
1244 return -1;
1245
1246 sig_n = sig_num(signame);
1247 sig_n = rtmax ? SIGRTMAX - sig_n : SIGRTMIN + sig_n;
1248 if (sig_n > SIGRTMAX || sig_n < SIGRTMIN)
1249 return -1;
1250
1251 return sig_n;
1252 }
1253
1254 static int sig_parse(const char *signame)
1255 {
1256 size_t n;
1257
1258 if (isdigit(*signame)) {
1259 return sig_num(signame);
1260 } else if (strncasecmp(signame, "sig", 3) == 0) {
1261 signame += 3;
1262 if (strncasecmp(signame, "rt", 2) == 0)
1263 return rt_sig_num(signame + 2);
1264 for (n = 0; n < sizeof(signames) / sizeof((signames)[0]); n++) {
1265 if (strcasecmp(signames[n].name, signame) == 0)
1266 return signames[n].num;
1267 }
1268 }
1269
1270 return -1;
1271 }
1272
1273 static int set_config_signal_halt(const char *key, const char *value,
1274 struct lxc_conf *lxc_conf, void *data)
1275 {
1276 int sig_n;
1277
1278 if (lxc_config_value_empty(value)) {
1279 lxc_conf->haltsignal = 0;
1280 return 0;
1281 }
1282
1283 sig_n = sig_parse(value);
1284 if (sig_n < 0)
1285 return -1;
1286
1287 lxc_conf->haltsignal = sig_n;
1288
1289 return 0;
1290 }
1291
1292 static int set_config_signal_reboot(const char *key, const char *value,
1293 struct lxc_conf *lxc_conf, void *data)
1294 {
1295 int sig_n;
1296
1297 if (lxc_config_value_empty(value)) {
1298 lxc_conf->rebootsignal = 0;
1299 return 0;
1300 }
1301
1302 sig_n = sig_parse(value);
1303 if (sig_n < 0)
1304 return -1;
1305
1306 lxc_conf->rebootsignal = sig_n;
1307
1308 return 0;
1309 }
1310
1311 static int set_config_signal_stop(const char *key, const char *value,
1312 struct lxc_conf *lxc_conf, void *data)
1313 {
1314 int sig_n;
1315
1316 if (lxc_config_value_empty(value)) {
1317 lxc_conf->stopsignal = 0;
1318 return 0;
1319 }
1320
1321 sig_n = sig_parse(value);
1322 if (sig_n < 0)
1323 return -1;
1324
1325 lxc_conf->stopsignal = sig_n;
1326
1327 return 0;
1328 }
1329
1330 static int __set_config_cgroup_controller(const char *key, const char *value,
1331 struct lxc_conf *lxc_conf, int version)
1332 {
1333 const char *subkey, *token;
1334 size_t token_len;
1335 struct lxc_list *cglist = NULL;
1336 struct lxc_cgroup *cgelem = NULL;
1337
1338 if (lxc_config_value_empty(value))
1339 return lxc_clear_cgroups(lxc_conf, key, version);
1340
1341 if (version == CGROUP2_SUPER_MAGIC) {
1342 token = "lxc.cgroup2.";
1343 token_len = 12;
1344 } else if (version == CGROUP_SUPER_MAGIC) {
1345 token = "lxc.cgroup.";
1346 token_len = 11;
1347 } else {
1348 return -EINVAL;
1349 }
1350
1351 if (strncmp(key, token, token_len) != 0)
1352 return -EINVAL;
1353
1354 subkey = key + token_len;
1355 if (*subkey == '\0')
1356 return -EINVAL;
1357
1358 cglist = malloc(sizeof(*cglist));
1359 if (!cglist)
1360 goto out;
1361
1362 cgelem = malloc(sizeof(*cgelem));
1363 if (!cgelem)
1364 goto out;
1365 memset(cgelem, 0, sizeof(*cgelem));
1366
1367 cgelem->subsystem = strdup(subkey);
1368 if (!cgelem->subsystem)
1369 goto out;
1370
1371 cgelem->value = strdup(value);
1372 if (!cgelem->value)
1373 goto out;
1374
1375 cgelem->version = version;
1376
1377 lxc_list_add_elem(cglist, cgelem);
1378
1379 if (version == CGROUP2_SUPER_MAGIC)
1380 lxc_list_add_tail(&lxc_conf->cgroup2, cglist);
1381 else
1382 lxc_list_add_tail(&lxc_conf->cgroup, cglist);
1383
1384 return 0;
1385
1386 out:
1387 free(cglist);
1388 if (cgelem) {
1389 free(cgelem->subsystem);
1390 free(cgelem->value);
1391 free(cgelem);
1392 }
1393
1394 return -1;
1395 }
1396
1397 static int set_config_cgroup_controller(const char *key, const char *value,
1398 struct lxc_conf *lxc_conf, void *data)
1399 {
1400 return __set_config_cgroup_controller(key, value, lxc_conf,
1401 CGROUP_SUPER_MAGIC);
1402 }
1403
1404 static int set_config_cgroup2_controller(const char *key, const char *value,
1405 struct lxc_conf *lxc_conf, void *data)
1406 {
1407 return __set_config_cgroup_controller(key, value, lxc_conf,
1408 CGROUP2_SUPER_MAGIC);
1409 }
1410
1411
1412 static int set_config_cgroup_dir(const char *key, const char *value,
1413 struct lxc_conf *lxc_conf, void *data)
1414 {
1415 if (lxc_config_value_empty(value))
1416 return clr_config_cgroup_dir(key, lxc_conf, NULL);
1417
1418 return set_config_string_item(&lxc_conf->cgroup_meta.dir, value);
1419 }
1420
1421 static int set_config_prlimit(const char *key, const char *value,
1422 struct lxc_conf *lxc_conf, void *data)
1423 {
1424 struct lxc_list *iter;
1425 struct rlimit limit;
1426 rlim_t limit_value;
1427 struct lxc_list *limlist = NULL;
1428 struct lxc_limit *limelem = NULL;
1429
1430 if (lxc_config_value_empty(value))
1431 return lxc_clear_limits(lxc_conf, key);
1432
1433 if (strncmp(key, "lxc.prlimit.", sizeof("lxc.prlimit.") - 1) != 0)
1434 return -1;
1435
1436 key += sizeof("lxc.prlimit.") - 1;
1437
1438 /* soft limit comes first in the value */
1439 if (!parse_limit_value(&value, &limit_value))
1440 return -1;
1441 limit.rlim_cur = limit_value;
1442
1443 /* skip spaces and a colon */
1444 while (isspace(*value))
1445 ++value;
1446
1447 if (*value == ':')
1448 ++value;
1449 else if (*value) /* any other character is an error here */
1450 return -1;
1451
1452 while (isspace(*value))
1453 ++value;
1454
1455 /* optional hard limit */
1456 if (*value) {
1457 if (!parse_limit_value(&value, &limit_value))
1458 return -1;
1459 limit.rlim_max = limit_value;
1460
1461 /* check for trailing garbage */
1462 while (isspace(*value))
1463 ++value;
1464
1465 if (*value)
1466 return -1;
1467 } else {
1468 /* a single value sets both hard and soft limit */
1469 limit.rlim_max = limit.rlim_cur;
1470 }
1471
1472 /* find existing list element */
1473 lxc_list_for_each(iter, &lxc_conf->limits) {
1474 limelem = iter->elem;
1475 if (!strcmp(key, limelem->resource)) {
1476 limelem->limit = limit;
1477 return 0;
1478 }
1479 }
1480
1481 /* allocate list element */
1482 limlist = malloc(sizeof(*limlist));
1483 if (!limlist)
1484 goto on_error;
1485
1486 limelem = malloc(sizeof(*limelem));
1487 if (!limelem)
1488 goto on_error;
1489 memset(limelem, 0, sizeof(*limelem));
1490
1491 limelem->resource = strdup(key);
1492 if (!limelem->resource)
1493 goto on_error;
1494 limelem->limit = limit;
1495
1496 lxc_list_add_elem(limlist, limelem);;
1497
1498 lxc_list_add_tail(&lxc_conf->limits, limlist);
1499
1500 return 0;
1501
1502 on_error:
1503 free(limlist);
1504 if (limelem) {
1505 free(limelem->resource);
1506 free(limelem);
1507 }
1508 return -1;
1509 }
1510
1511 static int set_config_sysctl(const char *key, const char *value,
1512 struct lxc_conf *lxc_conf, void *data)
1513 {
1514 struct lxc_list *iter;
1515 char *replace_value = NULL;
1516 struct lxc_list *sysctl_list = NULL;
1517 struct lxc_sysctl *sysctl_elem = NULL;
1518
1519 if (lxc_config_value_empty(value))
1520 return clr_config_sysctl(key, lxc_conf, NULL);
1521
1522 if (strncmp(key, "lxc.sysctl.", sizeof("lxc.sysctl.") - 1) != 0)
1523 return -1;
1524
1525 key += sizeof("lxc.sysctl.") - 1;
1526
1527 /* find existing list element */
1528 lxc_list_for_each(iter, &lxc_conf->sysctls) {
1529 sysctl_elem = iter->elem;
1530
1531 if (strcmp(key, sysctl_elem->key) != 0)
1532 continue;
1533
1534 replace_value = strdup(value);
1535 if (!replace_value)
1536 return -1;
1537
1538 free(sysctl_elem->value);
1539 sysctl_elem->value = replace_value;
1540 return 0;
1541 }
1542
1543 /* allocate list element */
1544 sysctl_list = malloc(sizeof(*sysctl_list));
1545 if (!sysctl_list)
1546 goto on_error;
1547
1548 sysctl_elem = malloc(sizeof(*sysctl_elem));
1549 if (!sysctl_elem)
1550 goto on_error;
1551 memset(sysctl_elem, 0, sizeof(*sysctl_elem));
1552
1553 sysctl_elem->key = strdup(key);
1554 if (!sysctl_elem->key)
1555 goto on_error;
1556
1557 sysctl_elem->value = strdup(value);
1558 if (!sysctl_elem->value)
1559 goto on_error;
1560
1561 lxc_list_add_elem(sysctl_list, sysctl_elem);
1562
1563 lxc_list_add_tail(&lxc_conf->sysctls, sysctl_list);
1564
1565 return 0;
1566
1567 on_error:
1568 free(sysctl_list);
1569 if (sysctl_elem) {
1570 free(sysctl_elem->key);
1571 free(sysctl_elem->value);
1572 free(sysctl_elem);
1573 }
1574 return -1;
1575 }
1576
1577 static int set_config_proc(const char *key, const char *value,
1578 struct lxc_conf *lxc_conf, void *data)
1579 {
1580 const char *subkey;
1581 struct lxc_list *proclist = NULL;
1582 struct lxc_proc *procelem = NULL;
1583
1584 if (lxc_config_value_empty(value))
1585 return clr_config_proc(key, lxc_conf, NULL);
1586
1587 if (strncmp(key, "lxc.proc.", sizeof("lxc.proc.") -1) != 0)
1588 return -1;
1589
1590 subkey = key + sizeof("lxc.proc.") - 1;
1591 if (*subkey == '\0')
1592 return -EINVAL;
1593
1594 proclist = malloc(sizeof(*proclist));
1595 if (!proclist)
1596 goto on_error;
1597
1598 procelem = malloc(sizeof(*procelem));
1599 if (!procelem)
1600 goto on_error;
1601 memset(procelem, 0, sizeof(*procelem));
1602
1603 procelem->filename = strdup(subkey);
1604 procelem->value = strdup(value);
1605
1606 if (!procelem->filename || !procelem->value)
1607 goto on_error;
1608
1609 proclist->elem = procelem;
1610
1611 lxc_list_add_tail(&lxc_conf->procs, proclist);
1612
1613 return 0;
1614
1615 on_error:
1616 free(proclist);
1617 if (procelem) {
1618 free(procelem->filename);
1619 free(procelem->value);
1620 free(procelem);
1621 }
1622
1623 return -1;
1624 }
1625
1626 static int set_config_idmaps(const char *key, const char *value,
1627 struct lxc_conf *lxc_conf, void *data)
1628 {
1629 unsigned long hostid, nsid, range;
1630 char type;
1631 int ret;
1632 struct lxc_list *idmaplist = NULL;
1633 struct id_map *idmap = NULL;
1634
1635 if (lxc_config_value_empty(value))
1636 return lxc_clear_idmaps(lxc_conf);
1637
1638 idmaplist = malloc(sizeof(*idmaplist));
1639 if (!idmaplist)
1640 goto on_error;
1641
1642 idmap = malloc(sizeof(*idmap));
1643 if (!idmap)
1644 goto on_error;
1645 memset(idmap, 0, sizeof(*idmap));
1646
1647 ret = parse_idmaps(value, &type, &nsid, &hostid, &range);
1648 if (ret < 0) {
1649 ERROR("Failed to parse id mappings");
1650 goto on_error;
1651 }
1652
1653 INFO("Read uid map: type %c nsid %lu hostid %lu range %lu", type, nsid, hostid, range);
1654 if (type == 'u')
1655 idmap->idtype = ID_TYPE_UID;
1656 else if (type == 'g')
1657 idmap->idtype = ID_TYPE_GID;
1658 else
1659 goto on_error;
1660
1661 idmap->hostid = hostid;
1662 idmap->nsid = nsid;
1663 idmap->range = range;
1664 idmaplist->elem = idmap;
1665 lxc_list_add_tail(&lxc_conf->id_map, idmaplist);
1666
1667 if (!lxc_conf->root_nsuid_map && idmap->idtype == ID_TYPE_UID)
1668 if (idmap->nsid == 0)
1669 lxc_conf->root_nsuid_map = idmap;
1670
1671
1672 if (!lxc_conf->root_nsgid_map && idmap->idtype == ID_TYPE_GID)
1673 if (idmap->nsid == 0)
1674 lxc_conf->root_nsgid_map = idmap;
1675
1676 idmap = NULL;
1677
1678 return 0;
1679
1680 on_error:
1681 free(idmaplist);
1682 free(idmap);
1683
1684 return -1;
1685 }
1686
1687 static int set_config_mount_fstab(const char *key, const char *value,
1688 struct lxc_conf *lxc_conf, void *data)
1689 {
1690 if (lxc_config_value_empty(value)) {
1691 clr_config_mount_fstab(key, lxc_conf, NULL);
1692 return -1;
1693 }
1694
1695 return set_config_path_item(&lxc_conf->fstab, value);
1696 }
1697
1698 static int set_config_mount_auto(const char *key, const char *value,
1699 struct lxc_conf *lxc_conf, void *data)
1700 {
1701 char *autos, *autoptr, *sptr, *token;
1702 int i;
1703 int ret = -1;
1704 static struct {
1705 const char *token;
1706 int mask;
1707 int flag;
1708 } allowed_auto_mounts[] = {
1709 { "proc", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED },
1710 { "proc:mixed", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED },
1711 { "proc:rw", LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_RW },
1712 { "sys", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED },
1713 { "sys:ro", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RO },
1714 { "sys:mixed", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_MIXED },
1715 { "sys:rw", LXC_AUTO_SYS_MASK, LXC_AUTO_SYS_RW },
1716 { "cgroup", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC },
1717 { "cgroup:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED },
1718 { "cgroup:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO },
1719 { "cgroup:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW },
1720 { "cgroup:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_NOSPEC | LXC_AUTO_CGROUP_FORCE },
1721 { "cgroup:mixed:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_MIXED | LXC_AUTO_CGROUP_FORCE },
1722 { "cgroup:ro:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RO | LXC_AUTO_CGROUP_FORCE },
1723 { "cgroup:rw:force", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_RW | LXC_AUTO_CGROUP_FORCE },
1724 { "cgroup-full", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_NOSPEC },
1725 { "cgroup-full:mixed", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_MIXED },
1726 { "cgroup-full:ro", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RO },
1727 { "cgroup-full:rw", LXC_AUTO_CGROUP_MASK, LXC_AUTO_CGROUP_FULL_RW },
1728 /* For adding anything that is just a single on/off, but has no
1729 * options: keep mask and flag identical and just define the enum
1730 * value as an unused bit so far
1731 */
1732 { NULL, 0, 0 }
1733 };
1734
1735 if (lxc_config_value_empty(value)) {
1736 lxc_conf->auto_mounts = 0;
1737 return 0;
1738 }
1739
1740 autos = strdup(value);
1741 if (!autos)
1742 return -1;
1743
1744 for (autoptr = autos;; autoptr = NULL) {
1745 token = strtok_r(autoptr, " \t", &sptr);
1746 if (!token) {
1747 ret = 0;
1748 break;
1749 }
1750
1751 for (i = 0; allowed_auto_mounts[i].token; i++) {
1752 if (!strcmp(allowed_auto_mounts[i].token, token))
1753 break;
1754 }
1755
1756 if (!allowed_auto_mounts[i].token) {
1757 ERROR("Invalid filesystem to automount \"%s\"", token);
1758 break;
1759 }
1760
1761 lxc_conf->auto_mounts &= ~allowed_auto_mounts[i].mask;
1762 lxc_conf->auto_mounts |= allowed_auto_mounts[i].flag;
1763 }
1764
1765 free(autos);
1766 return ret;
1767 }
1768
1769 static int set_config_mount(const char *key, const char *value,
1770 struct lxc_conf *lxc_conf, void *data)
1771 {
1772 char *mntelem;
1773 struct lxc_list *mntlist;
1774
1775 if (lxc_config_value_empty(value))
1776 return lxc_clear_mount_entries(lxc_conf);
1777
1778 mntlist = malloc(sizeof(*mntlist));
1779 if (!mntlist)
1780 return -1;
1781
1782 mntelem = strdup(value);
1783 if (!mntelem) {
1784 free(mntlist);
1785 return -1;
1786 }
1787 mntlist->elem = mntelem;
1788
1789 lxc_list_add_tail(&lxc_conf->mount_list, mntlist);
1790
1791 return 0;
1792 }
1793
1794 static int set_config_cap_keep(const char *key, const char *value,
1795 struct lxc_conf *lxc_conf, void *data)
1796 {
1797 char *keepcaps, *keepptr, *sptr, *token;
1798 struct lxc_list *keeplist;
1799 int ret = -1;
1800
1801 if (lxc_config_value_empty(value))
1802 return lxc_clear_config_keepcaps(lxc_conf);
1803
1804 keepcaps = strdup(value);
1805 if (!keepcaps)
1806 return -1;
1807
1808 /* In case several capability keep is specified in a single line
1809 * split these caps in a single element for the list.
1810 */
1811 for (keepptr = keepcaps;; keepptr = NULL) {
1812 token = strtok_r(keepptr, " \t", &sptr);
1813 if (!token) {
1814 ret = 0;
1815 break;
1816 }
1817
1818 if (!strcmp(token, "none"))
1819 lxc_clear_config_keepcaps(lxc_conf);
1820
1821 keeplist = malloc(sizeof(*keeplist));
1822 if (!keeplist)
1823 break;
1824
1825 keeplist->elem = strdup(token);
1826 if (!keeplist->elem) {
1827 free(keeplist);
1828 break;
1829 }
1830
1831 lxc_list_add_tail(&lxc_conf->keepcaps, keeplist);
1832 }
1833
1834 free(keepcaps);
1835
1836 return ret;
1837 }
1838
1839 static int set_config_cap_drop(const char *key, const char *value,
1840 struct lxc_conf *lxc_conf, void *data)
1841 {
1842 char *dropcaps, *dropptr, *sptr, *token;
1843 struct lxc_list *droplist;
1844 int ret = -1;
1845
1846 if (lxc_config_value_empty(value))
1847 return lxc_clear_config_caps(lxc_conf);
1848
1849 dropcaps = strdup(value);
1850 if (!dropcaps)
1851 return -1;
1852
1853 /* In case several capability drop is specified in a single line
1854 * split these caps in a single element for the list.
1855 */
1856 for (dropptr = dropcaps;; dropptr = NULL) {
1857 token = strtok_r(dropptr, " \t", &sptr);
1858 if (!token) {
1859 ret = 0;
1860 break;
1861 }
1862
1863 droplist = malloc(sizeof(*droplist));
1864 if (!droplist)
1865 break;
1866
1867 droplist->elem = strdup(token);
1868 if (!droplist->elem) {
1869 free(droplist);
1870 break;
1871 }
1872
1873 lxc_list_add_tail(&lxc_conf->caps, droplist);
1874 }
1875
1876 free(dropcaps);
1877
1878 return ret;
1879 }
1880
1881 static int set_config_console_path(const char *key, const char *value,
1882 struct lxc_conf *lxc_conf, void *data)
1883 {
1884 return set_config_path_item(&lxc_conf->console.path, value);
1885 }
1886
1887 static int set_config_console_rotate(const char *key, const char *value,
1888 struct lxc_conf *lxc_conf, void *data)
1889 {
1890 if (lxc_config_value_empty(value)) {
1891 lxc_conf->console.log_rotate = 0;
1892 return 0;
1893 }
1894
1895 if (lxc_safe_uint(value, &lxc_conf->console.log_rotate) < 0)
1896 return -1;
1897
1898 if (lxc_conf->console.log_rotate > 1) {
1899 ERROR("The \"lxc.console.rotate\" config key can only be set "
1900 "to 0 or 1");
1901 return -1;
1902 }
1903
1904 return 0;
1905 }
1906
1907 static int set_config_console_logfile(const char *key, const char *value,
1908 struct lxc_conf *lxc_conf, void *data)
1909 {
1910 return set_config_path_item(&lxc_conf->console.log_path, value);
1911 }
1912
1913 static int set_config_console_buffer_size(const char *key, const char *value,
1914 struct lxc_conf *lxc_conf, void *data)
1915 {
1916 int ret;
1917 int64_t size;
1918 uint64_t buffer_size, pgsz;
1919
1920 if (lxc_config_value_empty(value)) {
1921 lxc_conf->console.buffer_size = 0;
1922 return 0;
1923 }
1924
1925 /* If the user specified "auto" the default log size is 2^17 = 128 Kib */
1926 if (!strcmp(value, "auto")) {
1927 lxc_conf->console.buffer_size = 1 << 17;
1928 return 0;
1929 }
1930
1931 ret = parse_byte_size_string(value, &size);
1932 if (ret < 0)
1933 return -1;
1934
1935 if (size < 0)
1936 return -EINVAL;
1937
1938 /* must be at least a page size */
1939 pgsz = lxc_getpagesize();
1940 if ((uint64_t)size < pgsz) {
1941 NOTICE("Requested ringbuffer size for the console is %" PRId64
1942 " but must be at least %" PRId64
1943 " bytes. Setting ringbuffer size to %" PRId64 " bytes",
1944 size, pgsz, pgsz);
1945 size = pgsz;
1946 }
1947
1948 buffer_size = lxc_find_next_power2((uint64_t)size);
1949 if (buffer_size == 0)
1950 return -EINVAL;
1951
1952 if (buffer_size != size)
1953 NOTICE("Passed size was not a power of 2. Rounding log size to "
1954 "next power of two: %" PRIu64 " bytes", buffer_size);
1955
1956 lxc_conf->console.buffer_size = buffer_size;
1957 return 0;
1958 }
1959
1960 static int set_config_console_buffer_logfile(const char *key, const char *value,
1961 struct lxc_conf *lxc_conf,
1962 void *data)
1963 {
1964 return set_config_path_item(&lxc_conf->console.buffer_log_file, value);
1965 }
1966
1967 int append_unexp_config_line(const char *line, struct lxc_conf *conf)
1968 {
1969 size_t len = conf->unexpanded_len, linelen = strlen(line);
1970
1971 update_hwaddr(line);
1972
1973 while (conf->unexpanded_alloced <= len + linelen + 2) {
1974 char *tmp = realloc(conf->unexpanded_config,
1975 conf->unexpanded_alloced + 1024);
1976 if (!tmp)
1977 return -1;
1978
1979 if (!conf->unexpanded_config)
1980 *tmp = '\0';
1981 conf->unexpanded_config = tmp;
1982 conf->unexpanded_alloced += 1024;
1983 }
1984 strcat(conf->unexpanded_config, line);
1985 conf->unexpanded_len += linelen;
1986 if (line[linelen - 1] != '\n') {
1987 strcat(conf->unexpanded_config, "\n");
1988 conf->unexpanded_len++;
1989 }
1990
1991 return 0;
1992 }
1993
1994 static int do_includedir(const char *dirp, struct lxc_conf *lxc_conf)
1995 {
1996 struct dirent *direntp;
1997 DIR *dir;
1998 char path[MAXPATHLEN];
1999 int len;
2000 int ret = -1;
2001
2002 dir = opendir(dirp);
2003 if (!dir)
2004 return -1;
2005
2006 while ((direntp = readdir(dir))) {
2007 const char *fnam;
2008 if (!direntp)
2009 break;
2010
2011 fnam = direntp->d_name;
2012 if (!strcmp(fnam, "."))
2013 continue;
2014
2015 if (!strcmp(fnam, ".."))
2016 continue;
2017
2018 len = strlen(fnam);
2019 if (len < 6 || strncmp(fnam + len - 5, ".conf", 5) != 0)
2020 continue;
2021
2022 len = snprintf(path, MAXPATHLEN, "%s/%s", dirp, fnam);
2023 if (len < 0 || len >= MAXPATHLEN) {
2024 ret = -1;
2025 goto out;
2026 }
2027
2028 ret = lxc_config_read(path, lxc_conf, true);
2029 if (ret < 0)
2030 goto out;
2031 }
2032 ret = 0;
2033
2034 out:
2035 closedir(dir);
2036
2037 return ret;
2038 }
2039
2040 static int set_config_includefiles(const char *key, const char *value,
2041 struct lxc_conf *lxc_conf, void *data)
2042 {
2043 if (lxc_config_value_empty(value)) {
2044 clr_config_includefiles(key, lxc_conf, NULL);
2045 return 0;
2046 }
2047
2048 if (is_dir(value))
2049 return do_includedir(value, lxc_conf);
2050
2051 return lxc_config_read(value, lxc_conf, true);
2052 }
2053
2054 static int set_config_rootfs_path(const char *key, const char *value,
2055 struct lxc_conf *lxc_conf, void *data)
2056 {
2057 int ret;
2058 char *dup, *tmp;
2059 const char *container_path;
2060
2061 if (lxc_config_value_empty(value)) {
2062 free(lxc_conf->rootfs.path);
2063 lxc_conf->rootfs.path = NULL;
2064 return 0;
2065 }
2066
2067 dup = strdup(value);
2068 if (!dup)
2069 return -1;
2070
2071 /* Split <storage type>:<container path> into <storage type> and
2072 * <container path>. Set "rootfs.bdev_type" to <storage type> and
2073 * "rootfs.path" to <container path>.
2074 */
2075 tmp = strchr(dup, ':');
2076 if (tmp) {
2077 *tmp = '\0';
2078 ret = set_config_path_item(&lxc_conf->rootfs.bdev_type, dup);
2079 if (ret < 0) {
2080 free(dup);
2081 return -1;
2082 }
2083 tmp++;
2084 container_path = tmp;
2085 } else {
2086 container_path = value;
2087 }
2088
2089 ret = set_config_path_item(&lxc_conf->rootfs.path, container_path);
2090 free(dup);
2091 return ret;
2092 }
2093
2094 static int set_config_rootfs_mount(const char *key, const char *value,
2095 struct lxc_conf *lxc_conf, void *data)
2096 {
2097 return set_config_path_item(&lxc_conf->rootfs.mount, value);
2098 }
2099
2100 static int set_config_rootfs_options(const char *key, const char *value,
2101 struct lxc_conf *lxc_conf, void *data)
2102 {
2103 return set_config_string_item(&lxc_conf->rootfs.options, value);
2104 }
2105
2106 static int set_config_uts_name(const char *key, const char *value,
2107 struct lxc_conf *lxc_conf, void *data)
2108 {
2109 struct utsname *utsname;
2110
2111 if (lxc_config_value_empty(value)) {
2112 clr_config_uts_name(key, lxc_conf, NULL);
2113 return 0;
2114 }
2115
2116 utsname = malloc(sizeof(*utsname));
2117 if (!utsname)
2118 return -1;
2119
2120 if (strlen(value) >= sizeof(utsname->nodename)) {
2121 free(utsname);
2122 return -1;
2123 }
2124
2125 strcpy(utsname->nodename, value);
2126 free(lxc_conf->utsname);
2127 lxc_conf->utsname = utsname;
2128
2129 return 0;
2130 }
2131
2132 static int set_config_namespace_clone(const char *key, const char *value,
2133 struct lxc_conf *lxc_conf, void *data)
2134 {
2135 char *ns, *nsptr, *token;
2136 int cloneflag = 0;
2137 char *saveptr = NULL;
2138
2139 if (lxc_config_value_empty(value))
2140 return clr_config_namespace_clone(key, lxc_conf, data);
2141
2142 if (lxc_conf->ns_keep != 0) {
2143 ERROR("%s - Cannot set both \"lxc.namespace.clone\" and "
2144 "\"lxc.namespace.keep\"", strerror(EINVAL));
2145 return -EINVAL;
2146 }
2147
2148 ns = strdup(value);
2149 if (!ns)
2150 return -1;
2151 nsptr = ns;
2152
2153 for (; (token = strtok_r(nsptr, " \t", &saveptr)); nsptr = NULL) {
2154 token += lxc_char_left_gc(token, strlen(token));
2155 token[lxc_char_right_gc(token, strlen(token))] = '\0';
2156 cloneflag = lxc_namespace_2_cloneflag(token);
2157 if (cloneflag < 0) {
2158 free(ns);
2159 return -EINVAL;
2160 }
2161 lxc_conf->ns_clone |= cloneflag;
2162 }
2163 free(ns);
2164
2165 return 0;
2166 }
2167
2168 static int set_config_namespace_keep(const char *key, const char *value,
2169 struct lxc_conf *lxc_conf, void *data)
2170 {
2171 char *ns, *nsptr, *token;
2172 int cloneflag = 0;
2173 char *saveptr = NULL;
2174
2175 if (lxc_config_value_empty(value))
2176 return clr_config_namespace_keep(key, lxc_conf, data);
2177
2178 if (lxc_conf->ns_clone != 0) {
2179 ERROR("%s - Cannot set both \"lxc.namespace.clone\" and "
2180 "\"lxc.namespace.keep\"", strerror(EINVAL));
2181 return -EINVAL;
2182 }
2183
2184 ns = strdup(value);
2185 if (!ns)
2186 return -1;
2187 nsptr = ns;
2188
2189 for (; (token = strtok_r(nsptr, " \t", &saveptr)); nsptr = NULL) {
2190 token += lxc_char_left_gc(token, strlen(token));
2191 token[lxc_char_right_gc(token, strlen(token))] = '\0';
2192 cloneflag = lxc_namespace_2_cloneflag(token);
2193 if (cloneflag < 0) {
2194 free(ns);
2195 return -EINVAL;
2196 }
2197 lxc_conf->ns_keep |= cloneflag;
2198 }
2199 free(ns);
2200
2201 return 0;
2202 }
2203
2204 static int set_config_namespace_share(const char *key, const char *value,
2205 struct lxc_conf *lxc_conf, void *data)
2206 {
2207 int ns_idx;
2208 const char *namespace;
2209
2210 if (lxc_config_value_empty(value))
2211 return clr_config_namespace_share(key, lxc_conf, data);
2212
2213 namespace = key + sizeof("lxc.namespace.share.") - 1;
2214 ns_idx = lxc_namespace_2_ns_idx(namespace);
2215 if (ns_idx < 0)
2216 return ns_idx;
2217
2218 return set_config_string_item(&lxc_conf->ns_share[ns_idx], value);
2219 }
2220
2221 struct parse_line_conf {
2222 struct lxc_conf *conf;
2223 bool from_include;
2224 };
2225
2226 static int parse_line(char *buffer, void *data)
2227 {
2228 char *dot, *key, *line, *linep, *value;
2229 bool empty_line;
2230 struct lxc_config_t *config;
2231 int ret = 0;
2232 char *dup = buffer;
2233 struct parse_line_conf *plc = data;
2234
2235 /* If there are newlines in the config file we should keep them. */
2236 empty_line = lxc_is_line_empty(dup);
2237 if (empty_line)
2238 dup = "\n";
2239
2240 /* We have to dup the buffer otherwise, at the re-exec for reboot we
2241 * modified the original string on the stack by replacing '=' by '\0'
2242 * below.
2243 */
2244 linep = line = strdup(dup);
2245 if (!line)
2246 return -1;
2247
2248 if (!plc->from_include) {
2249 ret = append_unexp_config_line(line, plc->conf);
2250 if (ret < 0)
2251 goto on_error;
2252 }
2253
2254 if (empty_line)
2255 goto on_error;
2256
2257 line += lxc_char_left_gc(line, strlen(line));
2258
2259 /* ignore comments */
2260 if (line[0] == '#')
2261 goto on_error;
2262
2263 /* martian option - don't add it to the config itself */
2264 if (strncmp(line, "lxc.", 4))
2265 goto on_error;
2266
2267 ret = -1;
2268
2269 dot = strchr(line, '=');
2270 if (!dot) {
2271 ERROR("Invalid configuration line: %s", line);
2272 goto on_error;
2273 }
2274
2275 *dot = '\0';
2276 value = dot + 1;
2277
2278 key = line;
2279 key[lxc_char_right_gc(key, strlen(key))] = '\0';
2280
2281 value += lxc_char_left_gc(value, strlen(value));
2282 value[lxc_char_right_gc(value, strlen(value))] = '\0';
2283
2284 if (*value == '\'' || *value == '\"') {
2285 size_t len;
2286
2287 len = strlen(value);
2288 if (len > 1 && value[len - 1] == *value) {
2289 value[len - 1] = '\0';
2290 value++;
2291 }
2292 }
2293
2294 config = lxc_get_config(key);
2295 if (!config) {
2296 ERROR("Unknown configuration key \"%s\"", key);
2297 goto on_error;
2298 }
2299
2300 ret = config->set(key, value, plc->conf, NULL);
2301
2302 on_error:
2303 free(linep);
2304 return ret;
2305 }
2306
2307 static int lxc_config_readline(char *buffer, struct lxc_conf *conf)
2308 {
2309 struct parse_line_conf c;
2310
2311 c.conf = conf;
2312 c.from_include = false;
2313
2314 return parse_line(buffer, &c);
2315 }
2316
2317 int lxc_config_read(const char *file, struct lxc_conf *conf, bool from_include)
2318 {
2319 int ret;
2320 struct parse_line_conf c;
2321
2322 c.conf = conf;
2323 c.from_include = from_include;
2324
2325 ret = access(file, R_OK);
2326 if (ret < 0)
2327 return -1;
2328
2329 /* Catch only the top level config file name in the structure. */
2330 if (!conf->rcfile)
2331 conf->rcfile = strdup(file);
2332
2333 return lxc_file_for_each_line(file, parse_line, &c);
2334 }
2335
2336 int lxc_config_define_add(struct lxc_list *defines, char *arg)
2337 {
2338 struct lxc_list *dent;
2339
2340 dent = malloc(sizeof(struct lxc_list));
2341 if (!dent)
2342 return -1;
2343
2344 dent->elem = arg;
2345 lxc_list_add_tail(defines, dent);
2346 return 0;
2347 }
2348
2349 int lxc_config_define_load(struct lxc_list *defines, struct lxc_conf *conf)
2350 {
2351 struct lxc_list *it, *next;
2352 int ret = 0;
2353
2354 lxc_list_for_each(it, defines) {
2355 ret = lxc_config_readline(it->elem, conf);
2356 if (ret)
2357 break;
2358 }
2359
2360 lxc_list_for_each_safe(it, defines, next) {
2361 lxc_list_del(it);
2362 free(it);
2363 }
2364
2365 return ret;
2366 }
2367
2368 signed long lxc_config_parse_arch(const char *arch)
2369 {
2370 #if HAVE_SYS_PERSONALITY_H
2371 size_t i;
2372 struct per_name {
2373 char *name;
2374 unsigned long per;
2375 } pername[] = {
2376 { "x86", PER_LINUX32 },
2377 { "linux32", PER_LINUX32 },
2378 { "i386", PER_LINUX32 },
2379 { "i486", PER_LINUX32 },
2380 { "i586", PER_LINUX32 },
2381 { "i686", PER_LINUX32 },
2382 { "athlon", PER_LINUX32 },
2383 { "mips", PER_LINUX32 },
2384 { "mipsel", PER_LINUX32 },
2385 { "ppc", PER_LINUX32 },
2386 { "arm", PER_LINUX32 },
2387 { "armv7l", PER_LINUX32 },
2388 { "armhf", PER_LINUX32 },
2389 { "armel", PER_LINUX32 },
2390 { "powerpc", PER_LINUX32 },
2391 { "linux64", PER_LINUX },
2392 { "x86_64", PER_LINUX },
2393 { "amd64", PER_LINUX },
2394 { "mips64", PER_LINUX },
2395 { "mips64el", PER_LINUX },
2396 { "ppc64", PER_LINUX },
2397 { "ppc64le", PER_LINUX },
2398 { "ppc64el", PER_LINUX },
2399 { "powerpc64", PER_LINUX },
2400 { "s390x", PER_LINUX },
2401 { "aarch64", PER_LINUX },
2402 { "arm64", PER_LINUX },
2403 };
2404 size_t len = sizeof(pername) / sizeof(pername[0]);
2405
2406 for (i = 0; i < len; i++) {
2407 if (!strcmp(pername[i].name, arch))
2408 return pername[i].per;
2409 }
2410 #endif
2411
2412 return -1;
2413 }
2414
2415 /* Write out a configuration file. */
2416 void write_config(FILE *fout, struct lxc_conf *c)
2417 {
2418 int ret;
2419 size_t len = c->unexpanded_len;
2420
2421 if (!len)
2422 return;
2423
2424 ret = fwrite(c->unexpanded_config, 1, len, fout);
2425 if (ret != len)
2426 SYSERROR("Failed to write configuration file");
2427 }
2428
2429 bool do_append_unexp_config_line(struct lxc_conf *conf, const char *key,
2430 const char *v)
2431 {
2432 int ret;
2433 size_t len;
2434 char *tmp;
2435
2436 len = strlen(key) + strlen(v) + 4;
2437 tmp = alloca(len);
2438
2439 if (lxc_config_value_empty(v))
2440 ret = snprintf(tmp, len, "%s =", key);
2441 else
2442 ret = snprintf(tmp, len, "%s = %s", key, v);
2443 if (ret < 0 || ret >= len)
2444 return false;
2445
2446 /* Save the line verbatim into unexpanded_conf */
2447 if (append_unexp_config_line(tmp, conf))
2448 return false;
2449
2450 return true;
2451 }
2452
2453 void clear_unexp_config_line(struct lxc_conf *conf, const char *key,
2454 bool rm_subkeys)
2455 {
2456 char *lend;
2457 char *lstart = conf->unexpanded_config;
2458
2459 if (!conf->unexpanded_config)
2460 return;
2461
2462 while (*lstart) {
2463 lend = strchr(lstart, '\n');
2464 char v;
2465 if (!lend)
2466 lend = lstart + strlen(lstart);
2467 else
2468 lend++;
2469 if (strncmp(lstart, key, strlen(key)) != 0) {
2470 lstart = lend;
2471 continue;
2472 }
2473 if (!rm_subkeys) {
2474 v = lstart[strlen(key)];
2475 if (!isspace(v) && v != '=') {
2476 lstart = lend;
2477 continue;
2478 }
2479 }
2480 conf->unexpanded_len -= (lend - lstart);
2481 if (*lend == '\0') {
2482 *lstart = '\0';
2483 return;
2484 }
2485 memmove(lstart, lend, strlen(lend) + 1);
2486 }
2487 }
2488
2489 bool clone_update_unexp_ovl_paths(struct lxc_conf *conf, const char *oldpath,
2490 const char *newpath, const char *oldname,
2491 const char *newname, const char *ovldir)
2492 {
2493 int ret;
2494 char *lend, *newdir, *olddir, *p, *q;
2495 size_t newdirlen, olddirlen;
2496 char *lstart = conf->unexpanded_config;
2497 const char *key = "lxc.mount.entry";
2498
2499 olddirlen = strlen(ovldir) + strlen(oldpath) + strlen(oldname) + 2;
2500 olddir = alloca(olddirlen + 1);
2501 ret = snprintf(olddir, olddirlen + 1, "%s=%s/%s", ovldir, oldpath,
2502 oldname);
2503 if (ret < 0 || ret >= olddirlen + 1)
2504 return false;
2505
2506 newdirlen = strlen(ovldir) + strlen(newpath) + strlen(newname) + 2;
2507 newdir = alloca(newdirlen + 1);
2508 ret = snprintf(newdir, newdirlen + 1, "%s=%s/%s", ovldir, newpath,
2509 newname);
2510 if (ret < 0 || ret >= newdirlen + 1)
2511 return false;
2512
2513 if (!conf->unexpanded_config)
2514 return true;
2515
2516 while (*lstart) {
2517 lend = strchr(lstart, '\n');
2518 if (!lend)
2519 lend = lstart + strlen(lstart);
2520 else
2521 lend++;
2522
2523 if (strncmp(lstart, key, strlen(key)) != 0)
2524 goto next;
2525
2526 p = strchr(lstart + strlen(key), '=');
2527 if (!p)
2528 goto next;
2529 p++;
2530
2531 while (isblank(*p))
2532 p++;
2533
2534 if (p >= lend)
2535 goto next;
2536
2537 /* Whenever an lxc.mount.entry entry is found in a line we check
2538 * if the substring " overlay" or the substring " aufs" is
2539 * present before doing any further work. We check for "
2540 * overlay" and " aufs" since both substrings need to have at
2541 * least one space before them in a valid overlay
2542 * lxc.mount.entry (/A B overlay). When the space before is
2543 * missing it is very likely that these substrings are part of a
2544 * path or something else. (Checking q >= lend ensures that we
2545 * only count matches in the current line.) */
2546 if ((!(q = strstr(p, " overlay")) || q >= lend) &&
2547 (!(q = strstr(p, " aufs")) || q >= lend))
2548 goto next;
2549
2550 if (!(q = strstr(p, olddir)) || (q >= lend))
2551 goto next;
2552
2553 /* replace the olddir with newdir */
2554 if (olddirlen >= newdirlen) {
2555 size_t diff = olddirlen - newdirlen;
2556 memcpy(q, newdir, newdirlen);
2557 if (olddirlen != newdirlen) {
2558 memmove(q + newdirlen, q + newdirlen + diff,
2559 strlen(q) - newdirlen - diff + 1);
2560 lend -= diff;
2561 conf->unexpanded_len -= diff;
2562 }
2563 } else {
2564 char *new;
2565 size_t diff = newdirlen - olddirlen;
2566 size_t oldlen = conf->unexpanded_len;
2567 size_t newlen = oldlen + diff;
2568 size_t poffset = q - conf->unexpanded_config;
2569
2570 new = realloc(conf->unexpanded_config, newlen + 1);
2571 if (!new)
2572 return false;
2573
2574 conf->unexpanded_len = newlen;
2575 conf->unexpanded_alloced = newlen + 1;
2576 new[newlen - 1] = '\0';
2577 lend = new + (lend - conf->unexpanded_config);
2578 /* Move over the remainder to make room for the newdir.
2579 */
2580 memmove(new + poffset + newdirlen,
2581 new + poffset + olddirlen,
2582 oldlen - poffset - olddirlen + 1);
2583 conf->unexpanded_config = new;
2584 memcpy(new + poffset, newdir, newdirlen);
2585 lend += diff;
2586 }
2587 next:
2588 lstart = lend;
2589 }
2590
2591 return true;
2592 }
2593
2594 bool clone_update_unexp_hooks(struct lxc_conf *conf, const char *oldpath,
2595 const char *newpath, const char *oldname,
2596 const char *newname)
2597 {
2598 int ret;
2599 char *lend, *newdir, *olddir, *p;
2600 char *lstart = conf->unexpanded_config;
2601 size_t newdirlen, olddirlen;
2602 const char *key = "lxc.hook";
2603
2604 olddirlen = strlen(oldpath) + strlen(oldname) + 1;
2605 olddir = alloca(olddirlen + 1);
2606 ret = snprintf(olddir, olddirlen + 1, "%s/%s", oldpath, oldname);
2607 if (ret < 0 || ret >= olddirlen + 1)
2608 return false;
2609
2610 newdirlen = strlen(newpath) + strlen(newname) + 1;
2611 newdir = alloca(newdirlen + 1);
2612 ret = snprintf(newdir, newdirlen + 1, "%s/%s", newpath, newname);
2613 if (ret < 0 || ret >= newdirlen + 1)
2614 return false;
2615
2616 if (!conf->unexpanded_config)
2617 return true;
2618
2619 while (*lstart) {
2620 lend = strchr(lstart, '\n');
2621 if (!lend)
2622 lend = lstart + strlen(lstart);
2623 else
2624 lend++;
2625
2626 if (strncmp(lstart, key, strlen(key)) != 0)
2627 goto next;
2628
2629 p = strchr(lstart + strlen(key), '=');
2630 if (!p)
2631 goto next;
2632 p++;
2633
2634 while (isblank(*p))
2635 p++;
2636
2637 if (p >= lend)
2638 goto next;
2639
2640 if (strncmp(p, olddir, strlen(olddir)) != 0)
2641 goto next;
2642
2643 /* replace the olddir with newdir */
2644 if (olddirlen >= newdirlen) {
2645 size_t diff = olddirlen - newdirlen;
2646 memcpy(p, newdir, newdirlen);
2647 if (olddirlen != newdirlen) {
2648 memmove(p + newdirlen, p + newdirlen + diff,
2649 strlen(p) - newdirlen - diff + 1);
2650 lend -= diff;
2651 conf->unexpanded_len -= diff;
2652 }
2653 } else {
2654 char *new;
2655 size_t diff = newdirlen - olddirlen;
2656 size_t oldlen = conf->unexpanded_len;
2657 size_t newlen = oldlen + diff;
2658 size_t poffset = p - conf->unexpanded_config;
2659
2660 new = realloc(conf->unexpanded_config, newlen + 1);
2661 if (!new)
2662 return false;
2663
2664 conf->unexpanded_len = newlen;
2665 conf->unexpanded_alloced = newlen + 1;
2666 new[newlen - 1] = '\0';
2667 lend = new + (lend - conf->unexpanded_config);
2668 /* Move over the remainder to make room for the newdir.
2669 */
2670 memmove(new + poffset + newdirlen,
2671 new + poffset + olddirlen,
2672 oldlen - poffset - olddirlen + 1);
2673 conf->unexpanded_config = new;
2674 memcpy(new + poffset, newdir, newdirlen);
2675 lend += diff;
2676 }
2677 next:
2678 lstart = lend;
2679 }
2680
2681 return true;
2682 }
2683
2684 #define DO(cmd) \
2685 { \
2686 if (!(cmd)) { \
2687 ERROR("Error writing to new config"); \
2688 return false; \
2689 } \
2690 }
2691
2692 /* This is called only from clone. We wish to update all hwaddrs in the
2693 * unexpanded config file. We can't/don't want to update any which come from
2694 * lxc.includes (there shouldn't be any).
2695 * We can't just walk the c->lxc-conf->network list because that includes netifs
2696 * from the include files. So we update the ones which we find in the unexp
2697 * config file, then find the original macaddr in the conf->network, and update
2698 * that to the same value.
2699 */
2700 bool network_new_hwaddrs(struct lxc_conf *conf)
2701 {
2702 char *lend, *p, *p2;
2703 struct lxc_list *it;
2704 char *lstart = conf->unexpanded_config;
2705
2706 if (!conf->unexpanded_config)
2707 return true;
2708
2709 while (*lstart) {
2710 char newhwaddr[18], oldhwaddr[17];
2711
2712 lend = strchr(lstart, '\n');
2713 if (!lend)
2714 lend = lstart + strlen(lstart);
2715 else
2716 lend++;
2717
2718 if (!lxc_config_net_hwaddr(lstart)) {
2719 lstart = lend;
2720 continue;
2721 }
2722
2723 p = strchr(lstart, '=');
2724 if (!p) {
2725 lstart = lend;
2726 continue;
2727 }
2728
2729 p++;
2730 while (isblank(*p))
2731 p++;
2732 if (!*p)
2733 return true;
2734
2735 p2 = p;
2736 while (*p2 && !isblank(*p2) && *p2 != '\n')
2737 p2++;
2738
2739 if ((p2 - p) != 17) {
2740 WARN("Bad hwaddr entry");
2741 lstart = lend;
2742 continue;
2743 }
2744
2745 memcpy(oldhwaddr, p, 17);
2746
2747 if (!new_hwaddr(newhwaddr))
2748 return false;
2749
2750 memcpy(p, newhwaddr, 17);
2751 lxc_list_for_each(it, &conf->network) {
2752 struct lxc_netdev *n = it->elem;
2753
2754 if (n->hwaddr && memcmp(oldhwaddr, n->hwaddr, 17) == 0)
2755 memcpy(n->hwaddr, newhwaddr, 17);
2756 }
2757
2758 lstart = lend;
2759 }
2760
2761 return true;
2762 }
2763
2764 static int set_config_ephemeral(const char *key, const char *value,
2765 struct lxc_conf *lxc_conf, void *data)
2766 {
2767 if (lxc_config_value_empty(value)) {
2768 lxc_conf->ephemeral = 0;
2769 return 0;
2770 }
2771
2772 if (lxc_safe_uint(value, &lxc_conf->ephemeral) < 0)
2773 return -1;
2774
2775 if (lxc_conf->ephemeral > 1)
2776 return -1;
2777
2778 return 0;
2779 }
2780
2781 static int set_config_log_syslog(const char *key, const char *value,
2782 struct lxc_conf *lxc_conf, void *data)
2783 {
2784 int facility;
2785
2786 if (lxc_conf->syslog) {
2787 free(lxc_conf->syslog);
2788 lxc_conf->syslog = NULL;
2789 }
2790
2791 if (lxc_config_value_empty(value))
2792 return 0;
2793
2794 facility = lxc_syslog_priority_to_int(value);
2795 if (facility == -EINVAL)
2796 return -1;
2797
2798 lxc_log_syslog(facility);
2799 return set_config_string_item(&lxc_conf->syslog, value);
2800 }
2801
2802 static int set_config_no_new_privs(const char *key, const char *value,
2803 struct lxc_conf *lxc_conf, void *data)
2804 {
2805 unsigned int v;
2806
2807 if (lxc_config_value_empty(value)) {
2808 lxc_conf->no_new_privs = false;
2809 return 0;
2810 }
2811
2812 if (lxc_safe_uint(value, &v) < 0)
2813 return -1;
2814
2815 if (v > 1)
2816 return -1;
2817
2818 lxc_conf->no_new_privs = v ? true : false;
2819
2820 return 0;
2821 }
2822
2823 /* Callbacks to get configuration items. */
2824 static int get_config_personality(const char *key, char *retv, int inlen,
2825 struct lxc_conf *c, void *data)
2826 {
2827 int fulllen = 0;
2828
2829 if (!retv)
2830 inlen = 0;
2831 else
2832 memset(retv, 0, inlen);
2833
2834 #if HAVE_SYS_PERSONALITY_H
2835 int len = 0;
2836
2837 switch (c->personality) {
2838 case PER_LINUX32:
2839 strprint(retv, inlen, "i686");
2840 break;
2841 case PER_LINUX:
2842 strprint(retv, inlen, "x86_64");
2843 break;
2844 default:
2845 break;
2846 }
2847 #endif
2848
2849 return fulllen;
2850 }
2851
2852 static int get_config_pty_max(const char *key, char *retv, int inlen,
2853 struct lxc_conf *c, void *data)
2854 {
2855 return lxc_get_conf_int(c, retv, inlen, c->pts);
2856 }
2857
2858 static int get_config_tty_max(const char *key, char *retv, int inlen,
2859 struct lxc_conf *c, void *data)
2860 {
2861 return lxc_get_conf_int(c, retv, inlen, c->tty);
2862 }
2863
2864 static int get_config_tty_dir(const char *key, char *retv, int inlen,
2865 struct lxc_conf *c, void *data)
2866 {
2867 return lxc_get_conf_str(retv, inlen, c->ttydir);
2868 }
2869
2870 static int get_config_apparmor_profile(const char *key, char *retv, int inlen,
2871 struct lxc_conf *c, void *data)
2872 {
2873 return lxc_get_conf_str(retv, inlen, c->lsm_aa_profile);
2874 }
2875
2876 static int get_config_apparmor_allow_incomplete(const char *key, char *retv,
2877 int inlen, struct lxc_conf *c,
2878 void *data)
2879 {
2880 return lxc_get_conf_int(c, retv, inlen,
2881 c->lsm_aa_allow_incomplete);
2882 }
2883
2884 static int get_config_selinux_context(const char *key, char *retv, int inlen,
2885 struct lxc_conf *c, void *data)
2886 {
2887 return lxc_get_conf_str(retv, inlen, c->lsm_se_context);
2888 }
2889
2890 /* If you ask for a specific cgroup value, i.e. lxc.cgroup.devices.list, then
2891 * just the value(s) will be printed. Since there still could be more than one,
2892 * it is newline-separated.
2893 * (Maybe that's ambigous, since some values, i.e. devices.list, will already
2894 * have newlines?)
2895 * If you ask for 'lxc.cgroup", then all cgroup entries will be printed, in
2896 * 'lxc.cgroup.subsystem.key = value' format.
2897 */
2898 static int __get_config_cgroup_controller(const char *key, char *retv,
2899 int inlen, struct lxc_conf *c,
2900 int version)
2901 {
2902 int len;
2903 size_t namespaced_token_len;
2904 char *global_token, *namespaced_token;
2905 struct lxc_list *it;
2906 int fulllen = 0;
2907 bool get_all = false;
2908
2909 if (!retv)
2910 inlen = 0;
2911 else
2912 memset(retv, 0, inlen);
2913
2914 if (version == CGROUP2_SUPER_MAGIC) {
2915 global_token = "lxc.cgroup2";
2916 namespaced_token = "lxc.cgroup2.";
2917 namespaced_token_len = sizeof("lxc.cgroup2.") - 1;;
2918 } else if (version == CGROUP_SUPER_MAGIC) {
2919 global_token = "lxc.cgroup";
2920 namespaced_token = "lxc.cgroup.";
2921 namespaced_token_len = sizeof("lxc.cgroup.") - 1;;
2922 } else {
2923 return -1;
2924 }
2925
2926 if (strcmp(key, global_token) == 0)
2927 get_all = true;
2928 else if (strncmp(key, namespaced_token, namespaced_token_len) == 0)
2929 key += namespaced_token_len;
2930 else
2931 return -1;
2932
2933 lxc_list_for_each(it, &c->cgroup) {
2934 struct lxc_cgroup *cg = it->elem;
2935
2936 if (get_all) {
2937 if (version != cg->version)
2938 continue;
2939
2940 strprint(retv, inlen, "%s.%s = %s\n",
2941 global_token, cg->subsystem, cg->value);
2942 } else if (!strcmp(cg->subsystem, key)) {
2943 strprint(retv, inlen, "%s\n", cg->value);
2944 }
2945 }
2946
2947 return fulllen;
2948 }
2949
2950 static int get_config_cgroup_controller(const char *key, char *retv, int inlen,
2951 struct lxc_conf *c, void *data)
2952 {
2953 return __get_config_cgroup_controller(key, retv, inlen, c,
2954 CGROUP_SUPER_MAGIC);
2955 }
2956
2957 static int get_config_cgroup2_controller(const char *key, char *retv, int inlen,
2958 struct lxc_conf *c, void *data)
2959 {
2960 return __get_config_cgroup_controller(key, retv, inlen, c,
2961 CGROUP2_SUPER_MAGIC);
2962 }
2963
2964 static int get_config_cgroup_dir(const char *key, char *retv, int inlen,
2965 struct lxc_conf *lxc_conf, void *data)
2966 {
2967 int len;
2968 int fulllen = 0;
2969
2970 if (!retv)
2971 inlen = 0;
2972 else
2973 memset(retv, 0, inlen);
2974
2975 strprint(retv, inlen, "%s", lxc_conf->cgroup_meta.dir);
2976
2977 return fulllen;
2978 }
2979
2980 static int get_config_idmaps(const char *key, char *retv, int inlen,
2981 struct lxc_conf *c, void *data)
2982 {
2983 struct lxc_list *it;
2984 int len, listlen, ret;
2985 int fulllen = 0;
2986 /* "u 1000 1000000 65536"
2987 *
2988 * let's render this as
2989 *
2990 * sizeof(char)
2991 * +
2992 * sizeof(" ")
2993 * +
2994 * sizeof(uint64_t)
2995 * +
2996 * sizeof(" ")
2997 * +
2998 * sizeof(uint64_t)
2999 * +
3000 * sizeof(" ")
3001 * +
3002 * sizeof(uint64_t)
3003 * +
3004 * \0
3005 */
3006 #define __LXC_IDMAP_STR_BUF (3 * LXC_NUMSTRLEN64 + 3 + 1 + 1)
3007 char buf[__LXC_IDMAP_STR_BUF];
3008
3009 if (!retv)
3010 inlen = 0;
3011 else
3012 memset(retv, 0, inlen);
3013
3014 listlen = lxc_list_len(&c->id_map);
3015 lxc_list_for_each(it, &c->id_map)
3016 {
3017 struct id_map *map = it->elem;
3018 ret = snprintf(buf, __LXC_IDMAP_STR_BUF, "%c %lu %lu %lu",
3019 (map->idtype == ID_TYPE_UID) ? 'u' : 'g',
3020 map->nsid, map->hostid, map->range);
3021 if (ret < 0 || ret >= __LXC_IDMAP_STR_BUF)
3022 return -1;
3023
3024 strprint(retv, inlen, "%s%s", buf, (listlen-- > 1) ? "\n" : "");
3025 }
3026 return fulllen;
3027 }
3028
3029 static int get_config_log_level(const char *key, char *retv, int inlen,
3030 struct lxc_conf *c, void *data)
3031 {
3032 const char *v;
3033 v = lxc_log_priority_to_string(c->loglevel);
3034 return lxc_get_conf_str(retv, inlen, v);
3035 }
3036
3037 static int get_config_log_file(const char *key, char *retv, int inlen,
3038 struct lxc_conf *c, void *data)
3039 {
3040 return lxc_get_conf_str(retv, inlen, c->logfile);
3041 }
3042
3043 static int get_config_mount_fstab(const char *key, char *retv, int inlen,
3044 struct lxc_conf *c, void *data)
3045 {
3046 return lxc_get_conf_str(retv, inlen, c->fstab);
3047 }
3048
3049 static int get_config_mount_auto(const char *key, char *retv, int inlen,
3050 struct lxc_conf *c, void *data)
3051 {
3052 int len, fulllen = 0;
3053 const char *sep = "";
3054
3055 if (!retv)
3056 inlen = 0;
3057 else
3058 memset(retv, 0, inlen);
3059
3060 if (!(c->auto_mounts & LXC_AUTO_ALL_MASK))
3061 return 0;
3062
3063 switch (c->auto_mounts & LXC_AUTO_PROC_MASK) {
3064 case LXC_AUTO_PROC_MIXED:
3065 strprint(retv, inlen, "%sproc:mixed", sep);
3066 sep = " ";
3067 break;
3068 case LXC_AUTO_PROC_RW:
3069 strprint(retv, inlen, "%sproc:rw", sep);
3070 sep = " ";
3071 break;
3072 default:
3073 break;
3074 }
3075
3076 switch (c->auto_mounts & LXC_AUTO_SYS_MASK) {
3077 case LXC_AUTO_SYS_RO:
3078 strprint(retv, inlen, "%ssys:ro", sep);
3079 sep = " ";
3080 break;
3081 case LXC_AUTO_SYS_RW:
3082 strprint(retv, inlen, "%ssys:rw", sep);
3083 sep = " ";
3084 break;
3085 case LXC_AUTO_SYS_MIXED:
3086 strprint(retv, inlen, "%ssys:mixed", sep);
3087 sep = " ";
3088 break;
3089 default:
3090 break;
3091 }
3092
3093 switch (c->auto_mounts & LXC_AUTO_CGROUP_MASK) {
3094 case LXC_AUTO_CGROUP_NOSPEC:
3095 strprint(retv, inlen, "%scgroup", sep);
3096 break;
3097 case LXC_AUTO_CGROUP_MIXED:
3098 strprint(retv, inlen, "%scgroup:mixed", sep);
3099 break;
3100 case LXC_AUTO_CGROUP_RO:
3101 strprint(retv, inlen, "%scgroup:ro", sep);
3102 break;
3103 case LXC_AUTO_CGROUP_RW:
3104 strprint(retv, inlen, "%scgroup:rw", sep);
3105 break;
3106 case LXC_AUTO_CGROUP_FULL_NOSPEC:
3107 strprint(retv, inlen, "%scgroup-full", sep);
3108 break;
3109 case LXC_AUTO_CGROUP_FULL_MIXED:
3110 strprint(retv, inlen, "%scgroup-full:mixed", sep);
3111 break;
3112 case LXC_AUTO_CGROUP_FULL_RO:
3113 strprint(retv, inlen, "%scgroup-full:ro", sep);
3114 break;
3115 case LXC_AUTO_CGROUP_FULL_RW:
3116 strprint(retv, inlen, "%scgroup-full:rw", sep);
3117 break;
3118 default:
3119 break;
3120 }
3121
3122 return fulllen;
3123 }
3124
3125 static int get_config_mount(const char *key, char *retv, int inlen,
3126 struct lxc_conf *c, void *data)
3127 {
3128 int len, fulllen = 0;
3129 struct lxc_list *it;
3130
3131 if (!retv)
3132 inlen = 0;
3133 else
3134 memset(retv, 0, inlen);
3135
3136 lxc_list_for_each(it, &c->mount_list) {
3137 strprint(retv, inlen, "%s\n", (char *)it->elem);
3138 }
3139
3140 return fulllen;
3141 }
3142
3143 static int get_config_rootfs_path(const char *key, char *retv, int inlen,
3144 struct lxc_conf *c, void *data)
3145 {
3146 return lxc_get_conf_str(retv, inlen, c->rootfs.path);
3147 }
3148
3149 static int get_config_rootfs_mount(const char *key, char *retv, int inlen,
3150 struct lxc_conf *c, void *data)
3151 {
3152 return lxc_get_conf_str(retv, inlen, c->rootfs.mount);
3153 }
3154
3155 static int get_config_rootfs_options(const char *key, char *retv, int inlen,
3156 struct lxc_conf *c, void *data)
3157 {
3158 return lxc_get_conf_str(retv, inlen, c->rootfs.options);
3159 }
3160
3161 static int get_config_uts_name(const char *key, char *retv, int inlen,
3162 struct lxc_conf *c, void *data)
3163 {
3164 return lxc_get_conf_str(
3165 retv, inlen,
3166 c->utsname ? c->utsname->nodename : NULL);
3167 }
3168
3169 static int get_config_hooks(const char *key, char *retv, int inlen,
3170 struct lxc_conf *c, void *data)
3171 {
3172 char *subkey;
3173 int len, fulllen = 0, found = -1;
3174 struct lxc_list *it;
3175 int i;
3176
3177 subkey = strchr(key, '.');
3178 if (subkey)
3179 subkey = strchr(subkey + 1, '.');
3180 if (!subkey)
3181 return -1;
3182 subkey++;
3183 if (!*subkey)
3184 return -1;
3185 for (i = 0; i < NUM_LXC_HOOKS; i++) {
3186 if (strcmp(lxchook_names[i], subkey) == 0) {
3187 found = i;
3188 break;
3189 }
3190 }
3191 if (found == -1)
3192 return -1;
3193
3194 if (!retv)
3195 inlen = 0;
3196 else
3197 memset(retv, 0, inlen);
3198
3199 lxc_list_for_each(it, &c->hooks[found]) {
3200 strprint(retv, inlen, "%s\n", (char *)it->elem);
3201 }
3202 return fulllen;
3203 }
3204
3205 static int get_config_hooks_version(const char *key, char *retv, int inlen,
3206 struct lxc_conf *c, void *data)
3207 {
3208 return lxc_get_conf_int(c, retv, inlen, c->hooks_version);
3209 }
3210
3211 static int get_config_net(const char *key, char *retv, int inlen,
3212 struct lxc_conf *c, void *data)
3213 {
3214 int len, fulllen = 0;
3215 struct lxc_list *it;
3216
3217 if (!retv)
3218 inlen = 0;
3219 else
3220 memset(retv, 0, inlen);
3221
3222 lxc_list_for_each(it, &c->network) {
3223 struct lxc_netdev *n = it->elem;
3224 const char *t = lxc_net_type_to_str(n->type);
3225 strprint(retv, inlen, "%s\n", t ? t : "(invalid)");
3226 }
3227
3228 return fulllen;
3229 }
3230
3231 static int get_config_cap_drop(const char *key, char *retv, int inlen,
3232 struct lxc_conf *c, void *data)
3233 {
3234 int len, fulllen = 0;
3235 struct lxc_list *it;
3236
3237 if (!retv)
3238 inlen = 0;
3239 else
3240 memset(retv, 0, inlen);
3241
3242 lxc_list_for_each(it, &c->caps) {
3243 strprint(retv, inlen, "%s\n", (char *)it->elem);
3244 }
3245
3246 return fulllen;
3247 }
3248
3249 static int get_config_cap_keep(const char *key, char *retv, int inlen,
3250 struct lxc_conf *c, void *data)
3251 {
3252 int len, fulllen = 0;
3253 struct lxc_list *it;
3254
3255 if (!retv)
3256 inlen = 0;
3257 else
3258 memset(retv, 0, inlen);
3259
3260 lxc_list_for_each(it, &c->keepcaps) {
3261 strprint(retv, inlen, "%s\n", (char *)it->elem);
3262 }
3263
3264 return fulllen;
3265 }
3266
3267 static int get_config_console_path(const char *key, char *retv, int inlen,
3268 struct lxc_conf *c, void *data)
3269 {
3270 return lxc_get_conf_str(retv, inlen, c->console.path);
3271 }
3272
3273 static int get_config_console_logfile(const char *key, char *retv, int inlen,
3274 struct lxc_conf *c, void *data)
3275 {
3276 return lxc_get_conf_str(retv, inlen, c->console.log_path);
3277 }
3278
3279 static int get_config_console_rotate(const char *key, char *retv, int inlen,
3280 struct lxc_conf *c, void *data)
3281 {
3282 return lxc_get_conf_int(c, retv, inlen, c->console.log_rotate);
3283 }
3284
3285
3286 static int get_config_console_buffer_size(const char *key, char *retv,
3287 int inlen, struct lxc_conf *c,
3288 void *data)
3289 {
3290 return lxc_get_conf_uint64(c, retv, inlen, c->console.buffer_size);
3291 }
3292
3293 static int get_config_console_buffer_logfile(const char *key, char *retv,
3294 int inlen, struct lxc_conf *c,
3295 void *data)
3296 {
3297 return lxc_get_conf_str(retv, inlen, c->console.buffer_log_file);
3298 }
3299
3300 static int get_config_seccomp_profile(const char *key, char *retv, int inlen,
3301 struct lxc_conf *c, void *data)
3302 {
3303 return lxc_get_conf_str(retv, inlen, c->seccomp);
3304 }
3305
3306 static int get_config_autodev(const char *key, char *retv, int inlen,
3307 struct lxc_conf *c, void *data)
3308 {
3309 return lxc_get_conf_int(c, retv, inlen, c->autodev);
3310 }
3311
3312 static int get_config_signal_halt(const char *key, char *retv, int inlen,
3313 struct lxc_conf *c, void *data)
3314 {
3315 return lxc_get_conf_int(c, retv, inlen, c->haltsignal);
3316 }
3317
3318 static int get_config_signal_reboot(const char *key, char *retv, int inlen,
3319 struct lxc_conf *c, void *data)
3320 {
3321 return lxc_get_conf_int(c, retv, inlen, c->rebootsignal);
3322 }
3323
3324 static int get_config_signal_stop(const char *key, char *retv, int inlen,
3325 struct lxc_conf *c, void *data)
3326 {
3327 return lxc_get_conf_int(c, retv, inlen, c->stopsignal);
3328 }
3329
3330 static int get_config_start(const char *key, char *retv, int inlen,
3331 struct lxc_conf *c, void *data)
3332 {
3333 if (strcmp(key + 10, "auto") == 0)
3334 return lxc_get_conf_int(c, retv, inlen, c->start_auto);
3335 else if (strcmp(key + 10, "delay") == 0)
3336 return lxc_get_conf_int(c, retv, inlen, c->start_delay);
3337 else if (strcmp(key + 10, "order") == 0)
3338 return lxc_get_conf_int(c, retv, inlen, c->start_order);
3339
3340 return -1;
3341 }
3342
3343 static int get_config_log_syslog(const char *key, char *retv, int inlen,
3344 struct lxc_conf *c, void *data)
3345 {
3346 return lxc_get_conf_str(retv, inlen, c->syslog);
3347 }
3348
3349 static int get_config_monitor(const char *key, char *retv, int inlen,
3350 struct lxc_conf *c, void *data)
3351 {
3352 return lxc_get_conf_int(c, retv, inlen, c->monitor_unshare);
3353 }
3354
3355 static int get_config_group(const char *key, char *retv, int inlen,
3356 struct lxc_conf *c, void *data)
3357 {
3358 int len, fulllen = 0;
3359 struct lxc_list *it;
3360
3361 if (!retv)
3362 inlen = 0;
3363 else
3364 memset(retv, 0, inlen);
3365
3366 lxc_list_for_each(it, &c->groups) {
3367 strprint(retv, inlen, "%s\n", (char *)it->elem);
3368 }
3369
3370 return fulllen;
3371 }
3372
3373 static int get_config_environment(const char *key, char *retv, int inlen,
3374 struct lxc_conf *c, void *data)
3375 {
3376 int len, fulllen = 0;
3377 struct lxc_list *it;
3378
3379 if (!retv)
3380 inlen = 0;
3381 else
3382 memset(retv, 0, inlen);
3383
3384 lxc_list_for_each(it, &c->environment) {
3385 strprint(retv, inlen, "%s\n", (char *)it->elem);
3386 }
3387
3388 return fulllen;
3389 }
3390
3391 static int get_config_execute_cmd(const char *key, char *retv, int inlen,
3392 struct lxc_conf *c, void *data)
3393 {
3394 return lxc_get_conf_str(retv, inlen, c->execute_cmd);
3395 }
3396
3397 static int get_config_init_cmd(const char *key, char *retv, int inlen,
3398 struct lxc_conf *c, void *data)
3399 {
3400 return lxc_get_conf_str(retv, inlen, c->init_cmd);
3401 }
3402
3403 static int get_config_init_cwd(const char *key, char *retv, int inlen,
3404 struct lxc_conf *c, void *data)
3405 {
3406 return lxc_get_conf_str(retv, inlen, c->init_cwd);
3407 }
3408
3409 static int get_config_init_uid(const char *key, char *retv, int inlen,
3410 struct lxc_conf *c, void *data)
3411 {
3412 return lxc_get_conf_int(c, retv, inlen, c->init_uid);
3413 }
3414
3415 static int get_config_init_gid(const char *key, char *retv, int inlen,
3416 struct lxc_conf *c, void *data)
3417 {
3418 return lxc_get_conf_int(c, retv, inlen, c->init_gid);
3419 }
3420
3421 static int get_config_ephemeral(const char *key, char *retv, int inlen,
3422 struct lxc_conf *c, void *data)
3423 {
3424 return lxc_get_conf_int(c, retv, inlen, c->ephemeral);
3425 }
3426
3427 static int get_config_no_new_privs(const char *key, char *retv, int inlen,
3428 struct lxc_conf *c, void *data)
3429 {
3430 return lxc_get_conf_int(c, retv, inlen, c->no_new_privs);
3431 }
3432
3433 /* If you ask for a specific value, i.e. lxc.prlimit.nofile, then just the value
3434 * will be printed. If you ask for 'lxc.prlimit', then all limit entries will be
3435 * printed, in 'lxc.prlimit.resource = value' format.
3436 */
3437 static int get_config_prlimit(const char *key, char *retv, int inlen,
3438 struct lxc_conf *c, void *data)
3439 {
3440 int fulllen = 0, len;
3441 bool get_all = false;
3442 struct lxc_list *it;
3443
3444 if (!retv)
3445 inlen = 0;
3446 else
3447 memset(retv, 0, inlen);
3448
3449 if (!strcmp(key, "lxc.prlimit"))
3450 get_all = true;
3451 else if (strncmp(key, "lxc.prlimit.", 12) == 0)
3452 key += 12;
3453 else
3454 return -1;
3455
3456 lxc_list_for_each(it, &c->limits) {
3457 char buf[LXC_NUMSTRLEN64 * 2 + 2]; /* 2 colon separated 64 bit
3458 integers or the word
3459 'unlimited' */
3460 int partlen;
3461 struct lxc_limit *lim = it->elem;
3462
3463 if (lim->limit.rlim_cur == RLIM_INFINITY) {
3464 memcpy(buf, "unlimited", sizeof("unlimited"));
3465 partlen = sizeof("unlimited") - 1;
3466 } else {
3467 partlen = sprintf(buf, "%" PRIu64,
3468 (uint64_t)lim->limit.rlim_cur);
3469 }
3470 if (lim->limit.rlim_cur != lim->limit.rlim_max) {
3471 if (lim->limit.rlim_max == RLIM_INFINITY)
3472 memcpy(buf + partlen, ":unlimited",
3473 sizeof(":unlimited"));
3474 else
3475 sprintf(buf + partlen, ":%" PRIu64,
3476 (uint64_t)lim->limit.rlim_max);
3477 }
3478
3479 if (get_all) {
3480 strprint(retv, inlen, "lxc.prlimit.%s = %s\n",
3481 lim->resource, buf);
3482 } else if (!strcmp(lim->resource, key)) {
3483 strprint(retv, inlen, "%s", buf);
3484 }
3485 }
3486
3487 return fulllen;
3488 }
3489
3490 /* If you ask for a specific value, i.e. lxc.sysctl.net.ipv4.ip_forward, then
3491 * just the value will be printed. If you ask for 'lxc.sysctl', then all sysctl
3492 * entries will be printed, in 'lxc.sysctl.key = value' format.
3493 */
3494 static int get_config_sysctl(const char *key, char *retv, int inlen,
3495 struct lxc_conf *c, void *data)
3496 {
3497 int len;
3498 struct lxc_list *it;
3499 int fulllen = 0;
3500 bool get_all = false;
3501
3502 if (!retv)
3503 inlen = 0;
3504 else
3505 memset(retv, 0, inlen);
3506
3507 if (strcmp(key, "lxc.sysctl") == 0)
3508 get_all = true;
3509 else if (strncmp(key, "lxc.sysctl.", sizeof("lxc.sysctl.") - 1) == 0)
3510 key += sizeof("lxc.sysctl.") - 1;
3511 else
3512 return -1;
3513
3514 lxc_list_for_each(it, &c->sysctls) {
3515 struct lxc_sysctl *elem = it->elem;
3516 if (get_all) {
3517 strprint(retv, inlen, "lxc.sysctl.%s = %s\n",
3518 elem->key, elem->value);
3519 } else if (strcmp(elem->key, key) == 0) {
3520 strprint(retv, inlen, "%s", elem->value);
3521 }
3522 }
3523
3524 return fulllen;
3525 }
3526
3527 static int get_config_proc(const char *key, char *retv, int inlen,
3528 struct lxc_conf *c, void *data)
3529 {
3530 struct lxc_list *it;
3531 int len;
3532 int fulllen = 0;
3533 bool get_all = false;
3534
3535 if (!retv)
3536 inlen = 0;
3537 else
3538 memset(retv, 0, inlen);
3539
3540 if (strcmp(key, "lxc.proc") == 0)
3541 get_all = true;
3542 else if (strncmp(key, "lxc.proc.", sizeof("lxc.proc.") - 1) == 0)
3543 key += sizeof("lxc.proc.") - 1;
3544 else
3545 return -1;
3546
3547 lxc_list_for_each(it, &c->procs) {
3548 struct lxc_proc *proc = it->elem;
3549
3550 if (get_all) {
3551 strprint(retv, inlen, "lxc.proc.%s = %s\n",
3552 proc->filename, proc->value);
3553 } else if (strcmp(proc->filename, key) == 0) {
3554 strprint(retv, inlen, "%s", proc->value);
3555 }
3556 }
3557
3558 return fulllen;
3559 }
3560
3561 static int get_config_namespace_clone(const char *key, char *retv, int inlen,
3562 struct lxc_conf *c, void *data)
3563 {
3564 int i, len;
3565 int fulllen = 0;
3566
3567 if (!retv)
3568 inlen = 0;
3569 else
3570 memset(retv, 0, inlen);
3571
3572 for (i = 0; i < LXC_NS_MAX; i++) {
3573 if (c->ns_clone & ns_info[i].clone_flag)
3574 strprint(retv, inlen, "%s\n", ns_info[i].proc_name);
3575 }
3576
3577 return fulllen;
3578 }
3579
3580 static int get_config_namespace_keep(const char *key, char *retv, int inlen,
3581 struct lxc_conf *c, void *data)
3582 {
3583 int i, len;
3584 int fulllen = 0;
3585
3586 if (!retv)
3587 inlen = 0;
3588 else
3589 memset(retv, 0, inlen);
3590
3591 for (i = 0; i < LXC_NS_MAX; i++) {
3592 if (c->ns_keep & ns_info[i].clone_flag)
3593 strprint(retv, inlen, "%s\n", ns_info[i].proc_name);
3594 }
3595
3596 return fulllen;
3597 }
3598
3599 static int get_config_namespace_share(const char *key, char *retv, int inlen,
3600 struct lxc_conf *c, void *data)
3601 {
3602 int len, ns_idx;
3603 const char *namespace;
3604 int fulllen = 0;
3605
3606 if (!retv)
3607 inlen = 0;
3608 else
3609 memset(retv, 0, inlen);
3610
3611 namespace = key + sizeof("lxc.namespace.share.") - 1;
3612 ns_idx = lxc_namespace_2_ns_idx(namespace);
3613 if (ns_idx < 0)
3614 return ns_idx;
3615
3616 strprint(retv, inlen, "%s", c->ns_share[ns_idx]);
3617
3618 return fulllen;
3619 }
3620
3621 /* Callbacks to clear config items. */
3622 static inline int clr_config_personality(const char *key, struct lxc_conf *c,
3623 void *data)
3624 {
3625 c->personality = -1;
3626 return 0;
3627 }
3628
3629 static inline int clr_config_pty_max(const char *key, struct lxc_conf *c,
3630 void *data)
3631 {
3632 c->pts = 0;
3633 return 0;
3634 }
3635
3636 static inline int clr_config_tty_max(const char *key, struct lxc_conf *c,
3637 void *data)
3638 {
3639 c->tty = 0;
3640 return 0;
3641 }
3642
3643 static inline int clr_config_tty_dir(const char *key, struct lxc_conf *c,
3644 void *data)
3645 {
3646 free(c->ttydir);
3647 c->ttydir = NULL;
3648 return 0;
3649 }
3650
3651 static inline int clr_config_apparmor_profile(const char *key,
3652 struct lxc_conf *c, void *data)
3653 {
3654 free(c->lsm_aa_profile);
3655 c->lsm_aa_profile = NULL;
3656 return 0;
3657 }
3658
3659 static inline int clr_config_apparmor_allow_incomplete(const char *key,
3660 struct lxc_conf *c,
3661 void *data)
3662 {
3663 c->lsm_aa_allow_incomplete = 0;
3664 return 0;
3665 }
3666
3667 static inline int clr_config_selinux_context(const char *key,
3668 struct lxc_conf *c, void *data)
3669 {
3670 free(c->lsm_se_context);
3671 c->lsm_se_context = NULL;
3672 return 0;
3673 }
3674
3675 static inline int clr_config_cgroup_controller(const char *key,
3676 struct lxc_conf *c, void *data)
3677 {
3678 return lxc_clear_cgroups(c, key, CGROUP_SUPER_MAGIC);
3679 }
3680
3681 static inline int clr_config_cgroup2_controller(const char *key,
3682 struct lxc_conf *c, void *data)
3683 {
3684 return lxc_clear_cgroups(c, key, CGROUP2_SUPER_MAGIC);
3685 }
3686
3687 static int clr_config_cgroup_dir(const char *key, struct lxc_conf *lxc_conf,
3688 void *data)
3689 {
3690 if (lxc_conf->cgroup_meta.dir) {
3691 free(lxc_conf->cgroup_meta.dir);
3692 lxc_conf->cgroup_meta.dir = NULL;
3693 }
3694
3695 return 0;
3696 }
3697
3698 static inline int clr_config_idmaps(const char *key, struct lxc_conf *c,
3699 void *data)
3700 {
3701 return lxc_clear_idmaps(c);
3702 }
3703
3704 static inline int clr_config_log_level(const char *key, struct lxc_conf *c,
3705 void *data)
3706 {
3707 c->loglevel = LXC_LOG_LEVEL_NOTSET;
3708 return 0;
3709 }
3710
3711 static inline int clr_config_log_file(const char *key, struct lxc_conf *c,
3712 void *data)
3713 {
3714 free(c->logfile);
3715 c->logfile = NULL;
3716 return 0;
3717 }
3718
3719 static inline int clr_config_mount(const char *key, struct lxc_conf *c,
3720 void *data)
3721 {
3722 return lxc_clear_mount_entries(c);
3723 }
3724
3725 static inline int clr_config_mount_auto(const char *key, struct lxc_conf *c,
3726 void *data)
3727 {
3728 return lxc_clear_automounts(c);
3729 }
3730
3731 static inline int clr_config_mount_fstab(const char *key, struct lxc_conf *c,
3732 void *data)
3733 {
3734 free(c->fstab);
3735 c->fstab = NULL;
3736 return 0;
3737 }
3738
3739 static inline int clr_config_rootfs_path(const char *key, struct lxc_conf *c,
3740 void *data)
3741 {
3742 free(c->rootfs.path);
3743 c->rootfs.path = NULL;
3744 return 0;
3745 }
3746
3747 static inline int clr_config_rootfs_mount(const char *key, struct lxc_conf *c,
3748 void *data)
3749 {
3750 free(c->rootfs.mount);
3751 c->rootfs.mount = NULL;
3752 return 0;
3753 }
3754
3755 static inline int clr_config_rootfs_options(const char *key, struct lxc_conf *c,
3756 void *data)
3757 {
3758 free(c->rootfs.options);
3759 c->rootfs.options = NULL;
3760 return 0;
3761 }
3762
3763 static inline int clr_config_uts_name(const char *key, struct lxc_conf *c,
3764 void *data)
3765 {
3766 free(c->utsname);
3767 c->utsname = NULL;
3768 return 0;
3769 }
3770
3771 static inline int clr_config_hooks(const char *key, struct lxc_conf *c,
3772 void *data)
3773 {
3774 return lxc_clear_hooks(c, key);
3775 }
3776
3777 static inline int clr_config_hooks_version(const char *key, struct lxc_conf *c,
3778 void *data)
3779 {
3780 /* default to legacy hooks version */
3781 c->hooks_version = 0;
3782 return 0;
3783 }
3784
3785 static inline int clr_config_net(const char *key, struct lxc_conf *c,
3786 void *data)
3787 {
3788 lxc_free_networks(&c->network);
3789
3790 return 0;
3791 }
3792
3793 static inline int clr_config_cap_drop(const char *key, struct lxc_conf *c,
3794 void *data)
3795 {
3796 return lxc_clear_config_caps(c);
3797 }
3798
3799 static inline int clr_config_cap_keep(const char *key, struct lxc_conf *c,
3800 void *data)
3801 {
3802 return lxc_clear_config_keepcaps(c);
3803 }
3804
3805 static inline int clr_config_console_path(const char *key, struct lxc_conf *c,
3806 void *data)
3807 {
3808 free(c->console.path);
3809 c->console.path = NULL;
3810 return 0;
3811 }
3812
3813 static inline int clr_config_console_logfile(const char *key,
3814 struct lxc_conf *c, void *data)
3815 {
3816 free(c->console.log_path);
3817 c->console.log_path = NULL;
3818 return 0;
3819 }
3820
3821 static inline int clr_config_console_rotate(const char *key, struct lxc_conf *c,
3822 void *data)
3823 {
3824 c->console.log_rotate = 0;
3825 return 0;
3826 }
3827
3828 static inline int clr_config_console_buffer_size(const char *key,
3829 struct lxc_conf *c, void *data)
3830 {
3831 c->console.buffer_size = 0;
3832 return 0;
3833 }
3834
3835 static inline int clr_config_console_buffer_logfile(const char *key,
3836 struct lxc_conf *c,
3837 void *data)
3838 {
3839 free(c->console.buffer_log_file);
3840 c->console.buffer_log_file = NULL;
3841 return 0;
3842 }
3843
3844 static inline int clr_config_seccomp_profile(const char *key,
3845 struct lxc_conf *c, void *data)
3846 {
3847 free(c->seccomp);
3848 c->seccomp = NULL;
3849 return 0;
3850 }
3851
3852 static inline int clr_config_autodev(const char *key, struct lxc_conf *c,
3853 void *data)
3854 {
3855 c->autodev = 1;
3856 return 0;
3857 }
3858
3859 static inline int clr_config_signal_halt(const char *key, struct lxc_conf *c,
3860 void *data)
3861 {
3862 c->haltsignal = 0;
3863 return 0;
3864 }
3865
3866 static inline int clr_config_signal_reboot(const char *key, struct lxc_conf *c,
3867 void *data)
3868 {
3869 c->rebootsignal = 0;
3870 return 0;
3871 }
3872
3873 static inline int clr_config_signal_stop(const char *key, struct lxc_conf *c,
3874 void *data)
3875 {
3876 c->stopsignal = 0;
3877 return 0;
3878 }
3879
3880 static inline int clr_config_start(const char *key, struct lxc_conf *c,
3881 void *data)
3882 {
3883 if (strcmp(key + 10, "auto") == 0)
3884 c->start_auto = 0;
3885 else if (strcmp(key + 10, "delay") == 0)
3886 c->start_delay = 0;
3887 else if (strcmp(key + 10, "order") == 0)
3888 c->start_order = 0;
3889
3890 return 0;
3891 }
3892
3893 static inline int clr_config_log_syslog(const char *key, struct lxc_conf *c,
3894 void *data)
3895 {
3896 free(c->syslog);
3897 c->syslog = NULL;
3898 return 0;
3899 }
3900
3901 static inline int clr_config_monitor(const char *key, struct lxc_conf *c,
3902 void *data)
3903 {
3904 c->monitor_unshare = 0;
3905 return 0;
3906 }
3907
3908 static inline int clr_config_group(const char *key, struct lxc_conf *c,
3909 void *data)
3910 {
3911 return lxc_clear_groups(c);
3912 }
3913
3914 static inline int clr_config_environment(const char *key, struct lxc_conf *c,
3915 void *data)
3916 {
3917 return lxc_clear_environment(c);
3918 }
3919
3920 static inline int clr_config_execute_cmd(const char *key, struct lxc_conf *c,
3921 void *data)
3922 {
3923 free(c->execute_cmd);
3924 c->execute_cmd = NULL;
3925 return 0;
3926 }
3927
3928 static inline int clr_config_init_cmd(const char *key, struct lxc_conf *c,
3929 void *data)
3930 {
3931 free(c->init_cmd);
3932 c->init_cmd = NULL;
3933 return 0;
3934 }
3935
3936 static inline int clr_config_init_cwd(const char *key, struct lxc_conf *c,
3937 void *data)
3938 {
3939 free(c->init_cwd);
3940 c->init_cwd = NULL;
3941 return 0;
3942 }
3943
3944 static inline int clr_config_init_uid(const char *key, struct lxc_conf *c,
3945 void *data)
3946 {
3947 c->init_uid = 0;
3948 return 0;
3949 }
3950
3951 static inline int clr_config_init_gid(const char *key, struct lxc_conf *c,
3952 void *data)
3953 {
3954 c->init_gid = 0;
3955 return 0;
3956 }
3957
3958 static inline int clr_config_ephemeral(const char *key, struct lxc_conf *c,
3959 void *data)
3960 {
3961 c->ephemeral = 0;
3962 return 0;
3963 }
3964
3965 static inline int clr_config_no_new_privs(const char *key, struct lxc_conf *c,
3966 void *data)
3967 {
3968 c->no_new_privs = false;
3969 return 0;
3970 }
3971
3972 static inline int clr_config_prlimit(const char *key, struct lxc_conf *c,
3973 void *data)
3974 {
3975 return lxc_clear_limits(c, key);
3976 }
3977
3978 static inline int clr_config_sysctl(const char *key, struct lxc_conf *c,
3979 void *data)
3980 {
3981 return lxc_clear_sysctls(c, key);
3982 }
3983
3984 static inline int clr_config_proc(const char *key, struct lxc_conf *c,
3985 void *data)
3986 {
3987 return lxc_clear_procs(c, key);
3988 }
3989
3990 static inline int clr_config_includefiles(const char *key, struct lxc_conf *c,
3991 void *data)
3992 {
3993 lxc_clear_includes(c);
3994 return 0;
3995 }
3996
3997 static int clr_config_namespace_clone(const char *key,
3998 struct lxc_conf *lxc_conf, void *data)
3999 {
4000 lxc_conf->ns_clone = 0;
4001 return 0;
4002 }
4003
4004 static int clr_config_namespace_keep(const char *key, struct lxc_conf *lxc_conf,
4005 void *data)
4006 {
4007 lxc_conf->ns_keep = 0;
4008 return 0;
4009 }
4010
4011 static int clr_config_namespace_share(const char *key,
4012 struct lxc_conf *lxc_conf, void *data)
4013 {
4014 int ns_idx;
4015 const char *namespace;
4016
4017 namespace = key + sizeof("lxc.namespace.share.") - 1;
4018 ns_idx = lxc_namespace_2_ns_idx(namespace);
4019 if (ns_idx < 0)
4020 return ns_idx;
4021
4022 free(lxc_conf->ns_share[ns_idx]);
4023 lxc_conf->ns_share[ns_idx] = NULL;
4024
4025 return 0;
4026 }
4027
4028 static int get_config_includefiles(const char *key, char *retv, int inlen,
4029 struct lxc_conf *c, void *data)
4030 {
4031 return -ENOSYS;
4032 }
4033
4034 static struct lxc_config_t *get_network_config_ops(const char *key,
4035 struct lxc_conf *lxc_conf,
4036 ssize_t *idx,
4037 char **deindexed_key)
4038 {
4039 int ret;
4040 unsigned int tmpidx;
4041 size_t numstrlen;
4042 char *copy, *idx_start, *idx_end;
4043 struct lxc_config_t *config = NULL;
4044
4045 /* check that this is a sensible network key */
4046 if (strncmp("lxc.net.", key, 8)) {
4047 ERROR("Invalid network configuration key \"%s\"", key);
4048 return NULL;
4049 }
4050
4051 copy = strdup(key);
4052 if (!copy) {
4053 ERROR("Failed to duplicate string \"%s\"", key);
4054 return NULL;
4055 }
4056
4057 /* lxc.net.<n> */
4058 if (!isdigit(*(key + 8))) {
4059 ERROR("Failed to detect digit in string \"%s\"", key + 8);
4060 goto on_error;
4061 }
4062
4063 /* beginning of index string */
4064 idx_start = (copy + 7);
4065 *idx_start = '\0';
4066
4067 /* end of index string */
4068 idx_end = strchr((copy + 8), '.');
4069 if (idx_end)
4070 *idx_end = '\0';
4071
4072 /* parse current index */
4073 ret = lxc_safe_uint((idx_start + 1), &tmpidx);
4074 if (ret < 0) {
4075 ERROR("Failed to parse usigned integer from string \"%s\": %s",
4076 idx_start + 1, strerror(-ret));
4077 *idx = ret;
4078 goto on_error;
4079 }
4080
4081 /* This, of course is utterly nonsensical on so many levels, but
4082 * better safe than sorry.
4083 * (Checking for INT_MAX here is intentional.)
4084 */
4085 if (tmpidx == INT_MAX) {
4086 SYSERROR("Number of configured networks would overflow the "
4087 "counter");
4088 goto on_error;
4089 }
4090 *idx = tmpidx;
4091
4092 numstrlen = strlen((idx_start + 1));
4093
4094 /* repair configuration key */
4095 *idx_start = '.';
4096
4097 /* lxc.net.<idx>.<subkey> */
4098 if (idx_end) {
4099 *idx_end = '.';
4100 if (strlen(idx_end + 1) == 0) {
4101 ERROR("No subkey in network configuration key \"%s\"", key);
4102 goto on_error;
4103 }
4104
4105 memmove(copy + 8, idx_end + 1, strlen(idx_end + 1));
4106 copy[strlen(key) - numstrlen + 1] = '\0';
4107
4108 config = lxc_get_config(copy);
4109 if (!config) {
4110 ERROR("Unknown network configuration key \"%s\"", key);
4111 goto on_error;
4112 }
4113 }
4114
4115 if (deindexed_key)
4116 *deindexed_key = copy;
4117
4118 return config;
4119
4120 on_error:
4121 free(copy);
4122 return NULL;
4123 }
4124
4125 /* Config entry is something like "lxc.net.0.ipv4" the key 'lxc.net.' was
4126 * found. So we make sure next comes an integer, find the right callback (by
4127 * rewriting the key), and call it.
4128 */
4129 static int set_config_net_nic(const char *key, const char *value,
4130 struct lxc_conf *lxc_conf, void *data)
4131 {
4132 int ret;
4133 const char *idxstring;
4134 struct lxc_config_t *config;
4135 struct lxc_netdev *netdev;
4136 ssize_t idx = -1;
4137 char *deindexed_key = NULL;
4138
4139 idxstring = key + 8;
4140 if (!isdigit(*idxstring))
4141 return -1;
4142
4143 if (lxc_config_value_empty(value))
4144 return clr_config_net_nic(key, lxc_conf, data);
4145
4146 config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key);
4147 if (!config || idx < 0)
4148 return -1;
4149
4150 netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, true);
4151 if (!netdev) {
4152 free(deindexed_key);
4153 return -1;
4154 }
4155
4156 ret = config->set(deindexed_key, value, lxc_conf, netdev);
4157 free(deindexed_key);
4158 return ret;
4159 }
4160
4161 static int clr_config_net_nic(const char *key, struct lxc_conf *lxc_conf,
4162 void *data)
4163 {
4164 int ret;
4165 const char *idxstring;
4166 struct lxc_config_t *config;
4167 struct lxc_netdev *netdev;
4168 ssize_t idx = -1;
4169 char *deindexed_key = NULL;
4170
4171 idxstring = key + 8;
4172 if (!isdigit(*idxstring))
4173 return -1;
4174
4175 /* The left conjunct is pretty self-explanatory. The right conjunct
4176 * checks whether the two pointers are equal. If they are we know that
4177 * this is not a key that is namespaced any further and so we are
4178 * supposed to clear the whole network.
4179 */
4180 if (isdigit(*idxstring) && (strrchr(key, '.') == (idxstring - 1))) {
4181 unsigned int rmnetdevidx;
4182
4183 if (lxc_safe_uint(idxstring, &rmnetdevidx) < 0)
4184 return -1;
4185
4186 /* Remove network from network list. */
4187 lxc_remove_nic_by_idx(lxc_conf, rmnetdevidx);
4188 return 0;
4189 }
4190
4191 config = get_network_config_ops(key, lxc_conf, &idx, &deindexed_key);
4192 if (!config || idx < 0)
4193 return -1;
4194
4195 netdev = lxc_get_netdev_by_idx(lxc_conf, (unsigned int)idx, false);
4196 if (!netdev) {
4197 free(deindexed_key);
4198 return -1;
4199 }
4200
4201 ret = config->clr(deindexed_key, lxc_conf, netdev);
4202 free(deindexed_key);
4203 return ret;
4204 }
4205
4206 static int clr_config_net_type(const char *key, struct lxc_conf *lxc_conf,
4207 void *data)
4208 {
4209 struct lxc_netdev *netdev = data;
4210
4211 if (!netdev)
4212 return -1;
4213
4214 netdev->type = -1;
4215
4216 return 0;
4217 }
4218
4219 static int clr_config_net_name(const char *key, struct lxc_conf *lxc_conf,
4220 void *data)
4221 {
4222 struct lxc_netdev *netdev = data;
4223
4224 if (!netdev)
4225 return -1;
4226
4227 netdev->name[0] = '\0';
4228
4229 return 0;
4230 }
4231
4232 static int clr_config_net_flags(const char *key, struct lxc_conf *lxc_conf,
4233 void *data)
4234 {
4235 struct lxc_netdev *netdev = data;
4236
4237 if (!netdev)
4238 return -1;
4239
4240 netdev->flags = 0;
4241
4242 return 0;
4243 }
4244
4245 static int clr_config_net_link(const char *key, struct lxc_conf *lxc_conf,
4246 void *data)
4247 {
4248 struct lxc_netdev *netdev = data;
4249
4250 if (!netdev)
4251 return -1;
4252
4253 netdev->link[0] = '\0';
4254
4255 return 0;
4256 }
4257
4258 static int clr_config_net_macvlan_mode(const char *key,
4259 struct lxc_conf *lxc_conf, void *data)
4260 {
4261 struct lxc_netdev *netdev = data;
4262
4263 if (!netdev)
4264 return -1;
4265
4266 if (netdev->type != LXC_NET_MACVLAN)
4267 return 0;
4268
4269 netdev->priv.macvlan_attr.mode = -1;
4270
4271 return 0;
4272 }
4273
4274 static int clr_config_net_veth_pair(const char *key, struct lxc_conf *lxc_conf,
4275 void *data)
4276 {
4277 struct lxc_netdev *netdev = data;
4278
4279 if (!netdev)
4280 return -1;
4281
4282 netdev->priv.veth_attr.pair[0] = '\0';
4283
4284 return 0;
4285 }
4286
4287 static int clr_config_net_script_up(const char *key, struct lxc_conf *lxc_conf,
4288 void *data)
4289 {
4290 struct lxc_netdev *netdev = data;
4291
4292 if (!netdev)
4293 return -1;
4294
4295 free(netdev->upscript);
4296 netdev->upscript = NULL;
4297
4298 return 0;
4299 }
4300
4301 static int clr_config_net_script_down(const char *key,
4302 struct lxc_conf *lxc_conf, void *data)
4303 {
4304 struct lxc_netdev *netdev = data;
4305
4306 if (!netdev)
4307 return -1;
4308
4309 free(netdev->downscript);
4310 netdev->downscript = NULL;
4311
4312 return 0;
4313 }
4314
4315 static int clr_config_net_hwaddr(const char *key, struct lxc_conf *lxc_conf,
4316 void *data)
4317 {
4318 struct lxc_netdev *netdev = data;
4319
4320 if (!netdev)
4321 return -1;
4322
4323 free(netdev->hwaddr);
4324 netdev->hwaddr = NULL;
4325
4326 return 0;
4327 }
4328
4329 static int clr_config_net_mtu(const char *key, struct lxc_conf *lxc_conf,
4330 void *data)
4331 {
4332 struct lxc_netdev *netdev = data;
4333
4334 if (!netdev)
4335 return -1;
4336
4337 free(netdev->mtu);
4338 netdev->mtu = NULL;
4339
4340 return 0;
4341 }
4342
4343 static int clr_config_net_vlan_id(const char *key, struct lxc_conf *lxc_conf,
4344 void *data)
4345 {
4346 struct lxc_netdev *netdev = data;
4347
4348 if (!netdev)
4349 return -1;
4350
4351 netdev->priv.vlan_attr.vid = 0;
4352
4353 return 0;
4354 }
4355
4356 static int clr_config_net_ipv4_gateway(const char *key,
4357 struct lxc_conf *lxc_conf, void *data)
4358 {
4359 struct lxc_netdev *netdev = data;
4360
4361 if (!netdev)
4362 return -1;
4363
4364 free(netdev->ipv4_gateway);
4365 netdev->ipv4_gateway = NULL;
4366
4367 return 0;
4368 }
4369
4370 static int clr_config_net_ipv4_address(const char *key,
4371 struct lxc_conf *lxc_conf, void *data)
4372 {
4373 struct lxc_netdev *netdev = data;
4374 struct lxc_list *cur, *next;
4375
4376 if (!netdev)
4377 return -1;
4378
4379 lxc_list_for_each_safe(cur, &netdev->ipv4, next) {
4380 lxc_list_del(cur);
4381 free(cur->elem);
4382 free(cur);
4383 }
4384
4385 return 0;
4386 }
4387
4388 static int clr_config_net_ipv6_gateway(const char *key,
4389 struct lxc_conf *lxc_conf, void *data)
4390 {
4391 struct lxc_netdev *netdev = data;
4392
4393 if (!netdev)
4394 return -1;
4395
4396 free(netdev->ipv6_gateway);
4397 netdev->ipv6_gateway = NULL;
4398
4399 return 0;
4400 }
4401
4402 static int clr_config_net_ipv6_address(const char *key,
4403 struct lxc_conf *lxc_conf, void *data)
4404 {
4405 struct lxc_netdev *netdev = data;
4406 struct lxc_list *cur, *next;
4407
4408 if (!netdev)
4409 return -1;
4410
4411 lxc_list_for_each_safe(cur, &netdev->ipv6, next) {
4412 lxc_list_del(cur);
4413 free(cur->elem);
4414 free(cur);
4415 }
4416
4417 return 0;
4418 }
4419
4420 static int get_config_net_nic(const char *key, char *retv, int inlen,
4421 struct lxc_conf *c, void *data)
4422 {
4423 int ret;
4424 const char *idxstring;
4425 struct lxc_config_t *config;
4426 struct lxc_netdev *netdev;
4427 ssize_t idx = -1;
4428 char *deindexed_key = NULL;
4429
4430 idxstring = key + 8;
4431 if (!isdigit(*idxstring))
4432 return -1;
4433
4434 config = get_network_config_ops(key, c, &idx, &deindexed_key);
4435 if (!config || idx < 0)
4436 return -1;
4437
4438 netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false);
4439 if (!netdev) {
4440 free(deindexed_key);
4441 return -1;
4442 }
4443
4444 ret = config->get(deindexed_key, retv, inlen, c, netdev);
4445 free(deindexed_key);
4446 return ret;
4447 }
4448
4449 static int get_config_net_type(const char *key, char *retv, int inlen,
4450 struct lxc_conf *c, void *data)
4451 {
4452 int len;
4453 int fulllen = 0;
4454 struct lxc_netdev *netdev = data;
4455
4456 if (!retv)
4457 inlen = 0;
4458 else
4459 memset(retv, 0, inlen);
4460
4461 if (!netdev)
4462 return -1;
4463
4464 strprint(retv, inlen, "%s", lxc_net_type_to_str(netdev->type));
4465
4466 return fulllen;
4467 }
4468
4469 static int get_config_net_flags(const char *key, char *retv, int inlen,
4470 struct lxc_conf *c, void *data)
4471 {
4472 int len;
4473 int fulllen = 0;
4474 struct lxc_netdev *netdev = data;
4475
4476 if (!retv)
4477 inlen = 0;
4478 else
4479 memset(retv, 0, inlen);
4480
4481 if (!netdev)
4482 return -1;
4483
4484 if (netdev->flags & IFF_UP)
4485 strprint(retv, inlen, "up");
4486
4487 return fulllen;
4488 }
4489
4490 static int get_config_net_link(const char *key, char *retv, int inlen,
4491 struct lxc_conf *c, void *data)
4492 {
4493 int len;
4494 int fulllen = 0;
4495 struct lxc_netdev *netdev = data;
4496
4497 if (!retv)
4498 inlen = 0;
4499 else
4500 memset(retv, 0, inlen);
4501
4502 if (!netdev)
4503 return -1;
4504
4505 if (netdev->link[0] != '\0')
4506 strprint(retv, inlen, "%s", netdev->link);
4507
4508 return fulllen;
4509 }
4510
4511 static int get_config_net_name(const char *key, char *retv, int inlen,
4512 struct lxc_conf *c, void *data)
4513 {
4514 int len;
4515 int fulllen = 0;
4516 struct lxc_netdev *netdev = data;
4517
4518 if (!retv)
4519 inlen = 0;
4520 else
4521 memset(retv, 0, inlen);
4522
4523 if (!netdev)
4524 return -1;
4525
4526 if (netdev->name[0] != '\0')
4527 strprint(retv, inlen, "%s", netdev->name);
4528
4529 return fulllen;
4530 }
4531
4532 static int get_config_net_macvlan_mode(const char *key, char *retv, int inlen,
4533 struct lxc_conf *c, void *data)
4534 {
4535 int len;
4536 int fulllen = 0;
4537 const char *mode;
4538 struct lxc_netdev *netdev = data;
4539
4540 if (!retv)
4541 inlen = 0;
4542 else
4543 memset(retv, 0, inlen);
4544
4545 if (!netdev)
4546 return -1;
4547
4548 if (netdev->type != LXC_NET_MACVLAN)
4549 return 0;
4550
4551 switch (netdev->priv.macvlan_attr.mode) {
4552 case MACVLAN_MODE_PRIVATE:
4553 mode = "private";
4554 break;
4555 case MACVLAN_MODE_VEPA:
4556 mode = "vepa";
4557 break;
4558 case MACVLAN_MODE_BRIDGE:
4559 mode = "bridge";
4560 break;
4561 case MACVLAN_MODE_PASSTHRU:
4562 mode = "passthru";
4563 break;
4564 default:
4565 mode = "(invalid)";
4566 break;
4567 }
4568
4569 strprint(retv, inlen, "%s", mode);
4570
4571 return fulllen;
4572 }
4573
4574 static int get_config_net_veth_pair(const char *key, char *retv, int inlen,
4575 struct lxc_conf *c, void *data)
4576 {
4577 int len;
4578 int fulllen = 0;
4579 struct lxc_netdev *netdev = data;
4580
4581 if (!retv)
4582 inlen = 0;
4583 else
4584 memset(retv, 0, inlen);
4585
4586 if (!netdev)
4587 return -1;
4588
4589 if (netdev->type != LXC_NET_VETH)
4590 return 0;
4591
4592 strprint(retv, inlen, "%s",
4593 netdev->priv.veth_attr.pair[0] != '\0'
4594 ? netdev->priv.veth_attr.pair
4595 : netdev->priv.veth_attr.veth1);
4596
4597 return fulllen;
4598 }
4599
4600 static int get_config_net_script_up(const char *key, char *retv, int inlen,
4601 struct lxc_conf *c, void *data)
4602 {
4603 int len;
4604 int fulllen = 0;
4605 struct lxc_netdev *netdev = data;
4606
4607 if (!retv)
4608 inlen = 0;
4609 else
4610 memset(retv, 0, inlen);
4611
4612 if (!netdev)
4613 return -1;
4614
4615 if (netdev->upscript)
4616 strprint(retv, inlen, "%s", netdev->upscript);
4617
4618 return fulllen;
4619 }
4620
4621 static int get_config_net_script_down(const char *key, char *retv, int inlen,
4622 struct lxc_conf *c, void *data)
4623 {
4624 int len;
4625 int fulllen = 0;
4626 struct lxc_netdev *netdev = data;
4627
4628 if (!retv)
4629 inlen = 0;
4630 else
4631 memset(retv, 0, inlen);
4632
4633 if (!netdev)
4634 return -1;
4635
4636 if (netdev->downscript)
4637 strprint(retv, inlen, "%s", netdev->downscript);
4638
4639 return fulllen;
4640 }
4641
4642 static int get_config_net_hwaddr(const char *key, char *retv, int inlen,
4643 struct lxc_conf *c, void *data)
4644 {
4645 int len;
4646 int fulllen = 0;
4647 struct lxc_netdev *netdev = data;
4648
4649 if (!retv)
4650 inlen = 0;
4651 else
4652 memset(retv, 0, inlen);
4653
4654 if (!netdev)
4655 return -1;
4656
4657 if (netdev->hwaddr)
4658 strprint(retv, inlen, "%s", netdev->hwaddr);
4659
4660 return fulllen;
4661 }
4662
4663 static int get_config_net_mtu(const char *key, char *retv, int inlen,
4664 struct lxc_conf *c, void *data)
4665 {
4666 int len;
4667 int fulllen = 0;
4668 struct lxc_netdev *netdev = data;
4669
4670 if (!retv)
4671 inlen = 0;
4672 else
4673 memset(retv, 0, inlen);
4674
4675 if (!netdev)
4676 return -1;
4677
4678 if (netdev->mtu)
4679 strprint(retv, inlen, "%s", netdev->mtu);
4680
4681 return fulllen;
4682 }
4683
4684 static int get_config_net_vlan_id(const char *key, char *retv, int inlen,
4685 struct lxc_conf *c, void *data)
4686 {
4687 int len;
4688 int fulllen = 0;
4689 struct lxc_netdev *netdev = data;
4690
4691 if (!retv)
4692 inlen = 0;
4693 else
4694 memset(retv, 0, inlen);
4695
4696 if (!netdev)
4697 return -1;
4698
4699 if (netdev->type != LXC_NET_VLAN)
4700 return 0;
4701
4702 strprint(retv, inlen, "%d", netdev->priv.vlan_attr.vid);
4703
4704 return fulllen;
4705 }
4706
4707 static int get_config_net_ipv4_gateway(const char *key, char *retv, int inlen,
4708 struct lxc_conf *c, void *data)
4709 {
4710 int len;
4711 char buf[INET_ADDRSTRLEN];
4712 int fulllen = 0;
4713 struct lxc_netdev *netdev = data;
4714
4715 if (!retv)
4716 inlen = 0;
4717 else
4718 memset(retv, 0, inlen);
4719
4720 if (!netdev)
4721 return -1;
4722
4723 if (netdev->ipv4_gateway_auto) {
4724 strprint(retv, inlen, "auto");
4725 } else if (netdev->ipv4_gateway) {
4726 inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf));
4727 strprint(retv, inlen, "%s", buf);
4728 }
4729
4730 return fulllen;
4731 }
4732
4733 static int get_config_net_ipv4_address(const char *key, char *retv, int inlen,
4734 struct lxc_conf *c, void *data)
4735 {
4736 int len;
4737 size_t listlen;
4738 char buf[INET_ADDRSTRLEN];
4739 struct lxc_list *it;
4740 int fulllen = 0;
4741 struct lxc_netdev *netdev = data;
4742
4743 if (!retv)
4744 inlen = 0;
4745 else
4746 memset(retv, 0, inlen);
4747
4748 if (!netdev)
4749 return -1;
4750
4751 listlen = lxc_list_len(&netdev->ipv4);
4752 lxc_list_for_each(it, &netdev->ipv4) {
4753 struct lxc_inetdev *i = it->elem;
4754 inet_ntop(AF_INET, &i->addr, buf, sizeof(buf));
4755 strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
4756 (listlen-- > 1) ? "\n" : "");
4757 }
4758
4759 return fulllen;
4760 }
4761
4762 static int get_config_net_ipv6_gateway(const char *key, char *retv, int inlen,
4763 struct lxc_conf *c, void *data)
4764 {
4765 int len;
4766 char buf[INET6_ADDRSTRLEN];
4767 int fulllen = 0;
4768 struct lxc_netdev *netdev = data;
4769
4770 if (!retv)
4771 inlen = 0;
4772 else
4773 memset(retv, 0, inlen);
4774
4775 if (!netdev)
4776 return -1;
4777
4778 if (netdev->ipv6_gateway_auto) {
4779 strprint(retv, inlen, "auto");
4780 } else if (netdev->ipv6_gateway) {
4781 inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf));
4782 strprint(retv, inlen, "%s", buf);
4783 }
4784
4785 return fulllen;
4786 }
4787
4788 static int get_config_net_ipv6_address(const char *key, char *retv, int inlen,
4789 struct lxc_conf *c, void *data)
4790 {
4791 int len;
4792 size_t listlen;
4793 char buf[INET6_ADDRSTRLEN];
4794 struct lxc_list *it;
4795 int fulllen = 0;
4796 struct lxc_netdev *netdev = data;
4797
4798 if (!retv)
4799 inlen = 0;
4800 else
4801 memset(retv, 0, inlen);
4802
4803 if (!netdev)
4804 return -1;
4805
4806 listlen = lxc_list_len(&netdev->ipv6);
4807 lxc_list_for_each(it, &netdev->ipv6) {
4808 struct lxc_inet6dev *i = it->elem;
4809 inet_ntop(AF_INET6, &i->addr, buf, sizeof(buf));
4810 strprint(retv, inlen, "%s/%u%s", buf, i->prefix,
4811 (listlen-- > 1) ? "\n" : "");
4812 }
4813
4814 return fulllen;
4815 }
4816
4817 int lxc_list_config_items(char *retv, int inlen)
4818 {
4819 size_t i;
4820 int len;
4821 int fulllen = 0;
4822
4823 if (!retv)
4824 inlen = 0;
4825 else
4826 memset(retv, 0, inlen);
4827
4828 for (i = 0; i < config_size; i++) {
4829 char *s = config[i].name;
4830
4831 if (s[strlen(s) - 1] == '.')
4832 continue;
4833
4834 strprint(retv, inlen, "%s\n", s);
4835 }
4836
4837 return fulllen;
4838 }
4839
4840 int lxc_list_subkeys(struct lxc_conf *conf, const char *key, char *retv,
4841 int inlen)
4842 {
4843 int len;
4844 int fulllen = 0;
4845
4846 if (!retv)
4847 inlen = 0;
4848 else
4849 memset(retv, 0, inlen);
4850
4851 if (!strcmp(key, "lxc.apparmor")) {
4852 strprint(retv, inlen, "allow_incomplete\n");
4853 strprint(retv, inlen, "profile\n");
4854 } else if (!strcmp(key, "lxc.cgroup")) {
4855 strprint(retv, inlen, "dir\n");
4856 } else if (!strcmp(key, "lxc.selinux")) {
4857 strprint(retv, inlen, "context\n");
4858 } else if (!strcmp(key, "lxc.mount")) {
4859 strprint(retv, inlen, "auto\n");
4860 strprint(retv, inlen, "entry\n");
4861 strprint(retv, inlen, "fstab\n");
4862 } else if (!strcmp(key, "lxc.rootfs")) {
4863 strprint(retv, inlen, "mount\n");
4864 strprint(retv, inlen, "options\n");
4865 strprint(retv, inlen, "path\n");
4866 } else if (!strcmp(key, "lxc.uts")) {
4867 strprint(retv, inlen, "name\n");
4868 } else if (!strcmp(key, "lxc.hook")) {
4869 strprint(retv, inlen, "autodev\n");
4870 strprint(retv, inlen, "clone\n");
4871 strprint(retv, inlen, "destroy\n");
4872 strprint(retv, inlen, "mount\n");
4873 strprint(retv, inlen, "post-stop\n");
4874 strprint(retv, inlen, "pre-mount\n");
4875 strprint(retv, inlen, "pre-start\n");
4876 strprint(retv, inlen, "start-host\n");
4877 strprint(retv, inlen, "start\n");
4878 strprint(retv, inlen, "stop\n");
4879 } else if (!strcmp(key, "lxc.cap")) {
4880 strprint(retv, inlen, "drop\n");
4881 strprint(retv, inlen, "keep\n");
4882 } else if (!strcmp(key, "lxc.console")) {
4883 strprint(retv, inlen, "logfile\n");
4884 strprint(retv, inlen, "path\n");
4885 } else if (!strcmp(key, "lxc.seccomp")) {
4886 strprint(retv, inlen, "profile\n");
4887 } else if (!strcmp(key, "lxc.signal")) {
4888 strprint(retv, inlen, "halt\n");
4889 strprint(retv, inlen, "reboot\n");
4890 strprint(retv, inlen, "stop\n");
4891 } else if (!strcmp(key, "lxc.start")) {
4892 strprint(retv, inlen, "auto\n");
4893 strprint(retv, inlen, "delay\n");
4894 strprint(retv, inlen, "order\n");
4895 } else if (!strcmp(key, "lxc.monitor")) {
4896 strprint(retv, inlen, "unshare\n");
4897 } else {
4898 fulllen = -1;
4899 }
4900
4901 return fulllen;
4902 }
4903
4904 int lxc_list_net(struct lxc_conf *c, const char *key, char *retv, int inlen)
4905 {
4906 int len;
4907 const char *idxstring;
4908 struct lxc_netdev *netdev;
4909 int fulllen = 0;
4910 ssize_t idx = -1;
4911
4912 idxstring = key + 8;
4913 if (!isdigit(*idxstring))
4914 return -1;
4915
4916 (void)get_network_config_ops(key, c, &idx, NULL);
4917 if (idx < 0)
4918 return -1;
4919
4920 netdev = lxc_get_netdev_by_idx(c, (unsigned int)idx, false);
4921 if (!netdev)
4922 return -1;
4923
4924 if (!retv)
4925 inlen = 0;
4926 else
4927 memset(retv, 0, inlen);
4928
4929 strprint(retv, inlen, "type\n");
4930 strprint(retv, inlen, "script.up\n");
4931 strprint(retv, inlen, "script.down\n");
4932 if (netdev->type != LXC_NET_EMPTY) {
4933 strprint(retv, inlen, "flags\n");
4934 strprint(retv, inlen, "link\n");
4935 strprint(retv, inlen, "name\n");
4936 strprint(retv, inlen, "hwaddr\n");
4937 strprint(retv, inlen, "mtu\n");
4938 strprint(retv, inlen, "ipv6.address\n");
4939 strprint(retv, inlen, "ipv6.gateway\n");
4940 strprint(retv, inlen, "ipv4.address\n");
4941 strprint(retv, inlen, "ipv4.gateway\n");
4942 }
4943
4944 switch (netdev->type) {
4945 case LXC_NET_VETH:
4946 strprint(retv, inlen, "veth.pair\n");
4947 break;
4948 case LXC_NET_MACVLAN:
4949 strprint(retv, inlen, "macvlan.mode\n");
4950 break;
4951 case LXC_NET_VLAN:
4952 strprint(retv, inlen, "vlan.id\n");
4953 break;
4954 case LXC_NET_PHYS:
4955 break;
4956 }
4957
4958 return fulllen;
4959 }
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