]>
Commit | Line | Data |
---|---|---|
0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ad19a3f | 8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
0ad19a3f | 22 | */ |
23 | #define _GNU_SOURCE | |
24 | #include <stdio.h> | |
25 | #undef _GNU_SOURCE | |
26 | #include <stdlib.h> | |
e3b4c4c4 | 27 | #include <stdarg.h> |
0ad19a3f | 28 | #include <errno.h> |
29 | #include <string.h> | |
30 | #include <dirent.h> | |
0ad19a3f | 31 | #include <unistd.h> |
e3b4c4c4 | 32 | #include <sys/wait.h> |
2d76d1d7 | 33 | #include <sys/syscall.h> |
4a0ba80d | 34 | #include <time.h> |
e827ff7e | 35 | |
4ba0d9af SG |
36 | #if HAVE_IFADDRS_H |
37 | #include <ifaddrs.h> | |
38 | #else | |
39 | #include <../include/ifaddrs.h> | |
40 | #endif | |
41 | ||
e827ff7e | 42 | #if HAVE_PTY_H |
b0a33c1e | 43 | #include <pty.h> |
e827ff7e SG |
44 | #else |
45 | #include <../include/openpty.h> | |
46 | #endif | |
0ad19a3f | 47 | |
b3ecde1e DL |
48 | #include <linux/loop.h> |
49 | ||
0ad19a3f | 50 | #include <sys/types.h> |
51 | #include <sys/utsname.h> | |
52 | #include <sys/param.h> | |
53 | #include <sys/stat.h> | |
54 | #include <sys/socket.h> | |
55 | #include <sys/mount.h> | |
56 | #include <sys/mman.h> | |
81810dd1 | 57 | #include <sys/prctl.h> |
0ad19a3f | 58 | |
59 | #include <arpa/inet.h> | |
60 | #include <fcntl.h> | |
61 | #include <netinet/in.h> | |
62 | #include <net/if.h> | |
6f4a3756 | 63 | #include <libgen.h> |
0ad19a3f | 64 | |
e5bda9ee | 65 | #include "network.h" |
66 | #include "error.h" | |
b2718c72 | 67 | #include "parse.h" |
881450bb | 68 | #include "config.h" |
1b09f2c0 DL |
69 | #include "utils.h" |
70 | #include "conf.h" | |
71 | #include "log.h" | |
72 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
d55bc1ad | 73 | #include "caps.h" /* for lxc_caps_last_cap() */ |
9be53773 | 74 | #include "bdev.h" |
36eb9bde | 75 | |
d0a36f2c SG |
76 | #if HAVE_APPARMOR |
77 | #include <apparmor.h> | |
78 | #endif | |
79 | ||
495d2046 SG |
80 | #if HAVE_SYS_CAPABILITY_H |
81 | #include <sys/capability.h> | |
82 | #endif | |
83 | ||
6ff05e18 SG |
84 | #if HAVE_SYS_PERSONALITY_H |
85 | #include <sys/personality.h> | |
86 | #endif | |
87 | ||
edaf8b1b SG |
88 | #if IS_BIONIC |
89 | #include <../include/lxcmntent.h> | |
90 | #else | |
91 | #include <mntent.h> | |
92 | #endif | |
93 | ||
769872f9 SH |
94 | #include "lxcseccomp.h" |
95 | ||
36eb9bde | 96 | lxc_log_define(lxc_conf, lxc); |
e5bda9ee | 97 | |
0ad19a3f | 98 | #define MAXHWLEN 18 |
99 | #define MAXINDEXLEN 20 | |
442cbbe6 | 100 | #define MAXMTULEN 16 |
0ad19a3f | 101 | #define MAXLINELEN 128 |
102 | ||
495d2046 | 103 | #if HAVE_SYS_CAPABILITY_H |
b09094da MN |
104 | #ifndef CAP_SETFCAP |
105 | #define CAP_SETFCAP 31 | |
106 | #endif | |
107 | ||
108 | #ifndef CAP_MAC_OVERRIDE | |
109 | #define CAP_MAC_OVERRIDE 32 | |
110 | #endif | |
111 | ||
112 | #ifndef CAP_MAC_ADMIN | |
113 | #define CAP_MAC_ADMIN 33 | |
114 | #endif | |
495d2046 | 115 | #endif |
b09094da MN |
116 | |
117 | #ifndef PR_CAPBSET_DROP | |
118 | #define PR_CAPBSET_DROP 24 | |
119 | #endif | |
120 | ||
9818cae4 SG |
121 | #ifndef LO_FLAGS_AUTOCLEAR |
122 | #define LO_FLAGS_AUTOCLEAR 4 | |
123 | #endif | |
124 | ||
2d76d1d7 SG |
125 | /* Define pivot_root() if missing from the C library */ |
126 | #ifndef HAVE_PIVOT_ROOT | |
127 | static int pivot_root(const char * new_root, const char * put_old) | |
128 | { | |
129 | #ifdef __NR_pivot_root | |
130 | return syscall(__NR_pivot_root, new_root, put_old); | |
131 | #else | |
132 | errno = ENOSYS; | |
133 | return -1; | |
134 | #endif | |
135 | } | |
136 | #else | |
137 | extern int pivot_root(const char * new_root, const char * put_old); | |
138 | #endif | |
139 | ||
140 | /* Define sethostname() if missing from the C library */ | |
141 | #ifndef HAVE_SETHOSTNAME | |
142 | static int sethostname(const char * name, size_t len) | |
143 | { | |
144 | #ifdef __NR_sethostname | |
145 | return syscall(__NR_sethostname, name, len); | |
146 | #else | |
147 | errno = ENOSYS; | |
148 | return -1; | |
149 | #endif | |
150 | } | |
151 | #endif | |
152 | ||
72f919c4 SG |
153 | /* Define __S_ISTYPE if missing from the C library */ |
154 | #ifndef __S_ISTYPE | |
155 | #define __S_ISTYPE(mode, mask) (((mode) & S_IFMT) == (mask)) | |
156 | #endif | |
157 | ||
72d0e1cb | 158 | char *lxchook_names[NUM_LXC_HOOKS] = { |
148e91f5 | 159 | "pre-start", "pre-mount", "mount", "autodev", "start", "post-stop", "clone" }; |
72d0e1cb | 160 | |
e3b4c4c4 | 161 | typedef int (*instanciate_cb)(struct lxc_handler *, struct lxc_netdev *); |
0ad19a3f | 162 | |
998ac676 RT |
163 | struct mount_opt { |
164 | char *name; | |
165 | int clear; | |
166 | int flag; | |
167 | }; | |
168 | ||
81810dd1 DL |
169 | struct caps_opt { |
170 | char *name; | |
171 | int value; | |
172 | }; | |
173 | ||
e3b4c4c4 ST |
174 | static int instanciate_veth(struct lxc_handler *, struct lxc_netdev *); |
175 | static int instanciate_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
176 | static int instanciate_vlan(struct lxc_handler *, struct lxc_netdev *); | |
177 | static int instanciate_phys(struct lxc_handler *, struct lxc_netdev *); | |
178 | static int instanciate_empty(struct lxc_handler *, struct lxc_netdev *); | |
82d5ae15 | 179 | |
24654103 DL |
180 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
181 | [LXC_NET_VETH] = instanciate_veth, | |
182 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
183 | [LXC_NET_VLAN] = instanciate_vlan, | |
184 | [LXC_NET_PHYS] = instanciate_phys, | |
185 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 186 | }; |
187 | ||
74a2b586 JK |
188 | static int shutdown_veth(struct lxc_handler *, struct lxc_netdev *); |
189 | static int shutdown_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
190 | static int shutdown_vlan(struct lxc_handler *, struct lxc_netdev *); | |
191 | static int shutdown_phys(struct lxc_handler *, struct lxc_netdev *); | |
192 | static int shutdown_empty(struct lxc_handler *, struct lxc_netdev *); | |
193 | ||
194 | static instanciate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
195 | [LXC_NET_VETH] = shutdown_veth, | |
196 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
197 | [LXC_NET_VLAN] = shutdown_vlan, | |
198 | [LXC_NET_PHYS] = shutdown_phys, | |
199 | [LXC_NET_EMPTY] = shutdown_empty, | |
200 | }; | |
201 | ||
998ac676 | 202 | static struct mount_opt mount_opt[] = { |
88d413d5 SW |
203 | { "defaults", 0, 0 }, |
204 | { "ro", 0, MS_RDONLY }, | |
205 | { "rw", 1, MS_RDONLY }, | |
206 | { "suid", 1, MS_NOSUID }, | |
207 | { "nosuid", 0, MS_NOSUID }, | |
208 | { "dev", 1, MS_NODEV }, | |
209 | { "nodev", 0, MS_NODEV }, | |
210 | { "exec", 1, MS_NOEXEC }, | |
211 | { "noexec", 0, MS_NOEXEC }, | |
212 | { "sync", 0, MS_SYNCHRONOUS }, | |
213 | { "async", 1, MS_SYNCHRONOUS }, | |
214 | { "dirsync", 0, MS_DIRSYNC }, | |
215 | { "remount", 0, MS_REMOUNT }, | |
216 | { "mand", 0, MS_MANDLOCK }, | |
217 | { "nomand", 1, MS_MANDLOCK }, | |
218 | { "atime", 1, MS_NOATIME }, | |
219 | { "noatime", 0, MS_NOATIME }, | |
220 | { "diratime", 1, MS_NODIRATIME }, | |
221 | { "nodiratime", 0, MS_NODIRATIME }, | |
222 | { "bind", 0, MS_BIND }, | |
223 | { "rbind", 0, MS_BIND|MS_REC }, | |
224 | { "relatime", 0, MS_RELATIME }, | |
225 | { "norelatime", 1, MS_RELATIME }, | |
226 | { "strictatime", 0, MS_STRICTATIME }, | |
227 | { "nostrictatime", 1, MS_STRICTATIME }, | |
228 | { NULL, 0, 0 }, | |
998ac676 RT |
229 | }; |
230 | ||
495d2046 | 231 | #if HAVE_SYS_CAPABILITY_H |
81810dd1 | 232 | static struct caps_opt caps_opt[] = { |
a6afdde9 | 233 | { "chown", CAP_CHOWN }, |
1e11be34 DL |
234 | { "dac_override", CAP_DAC_OVERRIDE }, |
235 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
236 | { "fowner", CAP_FOWNER }, | |
237 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
238 | { "kill", CAP_KILL }, |
239 | { "setgid", CAP_SETGID }, | |
240 | { "setuid", CAP_SETUID }, | |
241 | { "setpcap", CAP_SETPCAP }, | |
242 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
243 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
244 | { "net_broadcast", CAP_NET_BROADCAST }, | |
245 | { "net_admin", CAP_NET_ADMIN }, | |
246 | { "net_raw", CAP_NET_RAW }, | |
247 | { "ipc_lock", CAP_IPC_LOCK }, | |
248 | { "ipc_owner", CAP_IPC_OWNER }, | |
249 | { "sys_module", CAP_SYS_MODULE }, | |
250 | { "sys_rawio", CAP_SYS_RAWIO }, | |
251 | { "sys_chroot", CAP_SYS_CHROOT }, | |
252 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
253 | { "sys_pacct", CAP_SYS_PACCT }, | |
254 | { "sys_admin", CAP_SYS_ADMIN }, | |
255 | { "sys_boot", CAP_SYS_BOOT }, | |
256 | { "sys_nice", CAP_SYS_NICE }, | |
257 | { "sys_resource", CAP_SYS_RESOURCE }, | |
258 | { "sys_time", CAP_SYS_TIME }, | |
259 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
260 | { "mknod", CAP_MKNOD }, | |
261 | { "lease", CAP_LEASE }, | |
9527e566 | 262 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 263 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
264 | #endif |
265 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 266 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 267 | #endif |
81810dd1 DL |
268 | { "setfcap", CAP_SETFCAP }, |
269 | { "mac_override", CAP_MAC_OVERRIDE }, | |
270 | { "mac_admin", CAP_MAC_ADMIN }, | |
5170c716 CS |
271 | #ifdef CAP_SYSLOG |
272 | { "syslog", CAP_SYSLOG }, | |
273 | #endif | |
274 | #ifdef CAP_WAKE_ALARM | |
275 | { "wake_alarm", CAP_WAKE_ALARM }, | |
276 | #endif | |
81810dd1 | 277 | }; |
495d2046 SG |
278 | #else |
279 | static struct caps_opt caps_opt[] = {}; | |
280 | #endif | |
81810dd1 | 281 | |
4a0ba80d SG |
282 | static char padchar[] = |
283 | "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; | |
284 | ||
285 | static char *mkifname(char *template) | |
286 | { | |
287 | char *name = NULL; | |
288 | int i = 0; | |
289 | FILE *urandom; | |
290 | unsigned int seed; | |
4a0ba80d SG |
291 | struct ifaddrs *ifaddr, *ifa; |
292 | int ifexists = 0; | |
293 | ||
294 | /* Get all the network interfaces */ | |
295 | getifaddrs(&ifaddr); | |
296 | ||
297 | /* Initialize the random number generator */ | |
298 | urandom = fopen ("/dev/urandom", "r"); | |
299 | if (urandom != NULL) { | |
300 | if (fread (&seed, sizeof(seed), 1, urandom) <= 0) | |
301 | seed = time(0); | |
302 | fclose(urandom); | |
303 | } | |
304 | else | |
305 | seed = time(0); | |
7f3e12f3 SG |
306 | |
307 | #ifndef HAVE_RAND_R | |
308 | srand(seed); | |
309 | #endif | |
4a0ba80d SG |
310 | |
311 | /* Generate random names until we find one that doesn't exist */ | |
312 | while(1) { | |
313 | ifexists = 0; | |
314 | name = strdup(template); | |
315 | ||
316 | if (name == NULL) | |
317 | return NULL; | |
318 | ||
319 | for (i = 0; i < strlen(name); i++) { | |
320 | if (name[i] == 'X') { | |
7f3e12f3 SG |
321 | #ifdef HAVE_RAND_R |
322 | name[i] = padchar[rand_r(&seed) % (strlen(padchar) - 1)]; | |
323 | #else | |
324 | name[i] = padchar[rand() % (strlen(padchar) - 1)]; | |
325 | #endif | |
4a0ba80d SG |
326 | } |
327 | } | |
328 | ||
329 | for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { | |
330 | if (strcmp(ifa->ifa_name, name) == 0) { | |
331 | ifexists = 1; | |
332 | break; | |
333 | } | |
334 | } | |
335 | ||
336 | if (ifexists == 0) | |
337 | break; | |
338 | ||
339 | free(name); | |
340 | } | |
341 | ||
342 | freeifaddrs(ifaddr); | |
343 | return name; | |
344 | } | |
345 | ||
91c3830e SH |
346 | static int run_buffer(char *buffer) |
347 | { | |
348 | FILE *f; | |
349 | char *output; | |
8e7da691 | 350 | int ret; |
91c3830e SH |
351 | |
352 | f = popen(buffer, "r"); | |
353 | if (!f) { | |
354 | SYSERROR("popen failed"); | |
355 | return -1; | |
356 | } | |
357 | ||
358 | output = malloc(LXC_LOG_BUFFER_SIZE); | |
359 | if (!output) { | |
360 | ERROR("failed to allocate memory for script output"); | |
00b6be44 | 361 | pclose(f); |
91c3830e SH |
362 | return -1; |
363 | } | |
364 | ||
365 | while(fgets(output, LXC_LOG_BUFFER_SIZE, f)) | |
366 | DEBUG("script output: %s", output); | |
367 | ||
368 | free(output); | |
369 | ||
8e7da691 DE |
370 | ret = pclose(f); |
371 | if (ret == -1) { | |
91c3830e SH |
372 | SYSERROR("Script exited on error"); |
373 | return -1; | |
8e7da691 DE |
374 | } else if (WIFEXITED(ret) && WEXITSTATUS(ret) != 0) { |
375 | ERROR("Script exited with status %d", WEXITSTATUS(ret)); | |
376 | return -1; | |
377 | } else if (WIFSIGNALED(ret)) { | |
378 | ERROR("Script terminated by signal %d (%s)", WTERMSIG(ret), | |
379 | strsignal(WTERMSIG(ret))); | |
380 | return -1; | |
91c3830e SH |
381 | } |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
148e91f5 | 386 | static int run_script_argv(const char *name, const char *section, |
283678ed SH |
387 | const char *script, const char *hook, const char *lxcpath, |
388 | char **argsin) | |
148e91f5 SH |
389 | { |
390 | int ret, i; | |
391 | char *buffer; | |
392 | size_t size = 0; | |
393 | ||
394 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
395 | script, name, section); | |
396 | ||
397 | for (i=0; argsin && argsin[i]; i++) | |
398 | size += strlen(argsin[i]) + 1; | |
399 | ||
400 | size += strlen(hook) + 1; | |
401 | ||
402 | size += strlen(script); | |
403 | size += strlen(name); | |
404 | size += strlen(section); | |
405 | size += 3; | |
406 | ||
407 | if (size > INT_MAX) | |
408 | return -1; | |
409 | ||
410 | buffer = alloca(size); | |
411 | if (!buffer) { | |
412 | ERROR("failed to allocate memory"); | |
413 | return -1; | |
414 | } | |
415 | ||
416 | ret = snprintf(buffer, size, "%s %s %s %s", script, name, section, hook); | |
417 | if (ret < 0 || ret >= size) { | |
418 | ERROR("Script name too long"); | |
419 | return -1; | |
420 | } | |
421 | ||
422 | for (i=0; argsin && argsin[i]; i++) { | |
423 | int len = size-ret; | |
424 | int rc; | |
425 | rc = snprintf(buffer + ret, len, " %s", argsin[i]); | |
426 | if (rc < 0 || rc >= len) { | |
427 | ERROR("Script args too long"); | |
428 | return -1; | |
429 | } | |
430 | ret += rc; | |
431 | } | |
432 | ||
433 | return run_buffer(buffer); | |
434 | } | |
435 | ||
751d9dcd DL |
436 | static int run_script(const char *name, const char *section, |
437 | const char *script, ...) | |
e3b4c4c4 | 438 | { |
abbfd20b | 439 | int ret; |
91c3830e | 440 | char *buffer, *p; |
abbfd20b DL |
441 | size_t size = 0; |
442 | va_list ap; | |
751d9dcd DL |
443 | |
444 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
445 | script, name, section); | |
e3b4c4c4 | 446 | |
abbfd20b DL |
447 | va_start(ap, script); |
448 | while ((p = va_arg(ap, char *))) | |
95642a10 | 449 | size += strlen(p) + 1; |
abbfd20b DL |
450 | va_end(ap); |
451 | ||
452 | size += strlen(script); | |
453 | size += strlen(name); | |
454 | size += strlen(section); | |
95642a10 | 455 | size += 3; |
abbfd20b | 456 | |
95642a10 MS |
457 | if (size > INT_MAX) |
458 | return -1; | |
459 | ||
460 | buffer = alloca(size); | |
abbfd20b DL |
461 | if (!buffer) { |
462 | ERROR("failed to allocate memory"); | |
751d9dcd DL |
463 | return -1; |
464 | } | |
465 | ||
9ba8130c SH |
466 | ret = snprintf(buffer, size, "%s %s %s", script, name, section); |
467 | if (ret < 0 || ret >= size) { | |
468 | ERROR("Script name too long"); | |
9ba8130c SH |
469 | return -1; |
470 | } | |
751d9dcd | 471 | |
abbfd20b | 472 | va_start(ap, script); |
9ba8130c SH |
473 | while ((p = va_arg(ap, char *))) { |
474 | int len = size-ret; | |
475 | int rc; | |
476 | rc = snprintf(buffer + ret, len, " %s", p); | |
477 | if (rc < 0 || rc >= len) { | |
9ba8130c SH |
478 | ERROR("Script args too long"); |
479 | return -1; | |
480 | } | |
481 | ret += rc; | |
482 | } | |
abbfd20b | 483 | va_end(ap); |
751d9dcd | 484 | |
91c3830e | 485 | return run_buffer(buffer); |
e3b4c4c4 ST |
486 | } |
487 | ||
a6afdde9 | 488 | static int find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 489 | { |
490 | struct cbarg { | |
491 | const char *rootfs; | |
a6afdde9 | 492 | const char *target; |
78ae2fcc | 493 | int mntopt; |
494 | } *cbarg = data; | |
495 | ||
496 | char *fstype; | |
497 | ||
498 | /* we don't try 'nodev' entries */ | |
499 | if (strstr(buffer, "nodev")) | |
500 | return 0; | |
501 | ||
502 | fstype = buffer; | |
b2718c72 | 503 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
504 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 505 | |
a6afdde9 DL |
506 | DEBUG("trying to mount '%s'->'%s' with fstype '%s'", |
507 | cbarg->rootfs, cbarg->target, fstype); | |
508 | ||
509 | if (mount(cbarg->rootfs, cbarg->target, fstype, cbarg->mntopt, NULL)) { | |
510 | DEBUG("mount failed with error: %s", strerror(errno)); | |
78ae2fcc | 511 | return 0; |
a6afdde9 | 512 | } |
78ae2fcc | 513 | |
a6afdde9 DL |
514 | INFO("mounted '%s' on '%s', with fstype '%s'", |
515 | cbarg->rootfs, cbarg->target, fstype); | |
78ae2fcc | 516 | |
517 | return 1; | |
518 | } | |
519 | ||
2656d231 | 520 | static int mount_unknow_fs(const char *rootfs, const char *target, int mntopt) |
78ae2fcc | 521 | { |
a6afdde9 | 522 | int i; |
78ae2fcc | 523 | |
524 | struct cbarg { | |
525 | const char *rootfs; | |
a6afdde9 | 526 | const char *target; |
78ae2fcc | 527 | int mntopt; |
528 | } cbarg = { | |
529 | .rootfs = rootfs, | |
a6afdde9 | 530 | .target = target, |
78ae2fcc | 531 | .mntopt = mntopt, |
532 | }; | |
533 | ||
a6afdde9 DL |
534 | /* |
535 | * find the filesystem type with brute force: | |
536 | * first we check with /etc/filesystems, in case the modules | |
78ae2fcc | 537 | * are auto-loaded and fall back to the supported kernel fs |
538 | */ | |
539 | char *fsfile[] = { | |
540 | "/etc/filesystems", | |
541 | "/proc/filesystems", | |
542 | }; | |
543 | ||
a6afdde9 DL |
544 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { |
545 | ||
546 | int ret; | |
547 | ||
548 | if (access(fsfile[i], F_OK)) | |
549 | continue; | |
550 | ||
551 | ret = lxc_file_for_each_line(fsfile[i], find_fstype_cb, &cbarg); | |
552 | if (ret < 0) { | |
553 | ERROR("failed to parse '%s'", fsfile[i]); | |
554 | return -1; | |
555 | } | |
556 | ||
557 | if (ret) | |
558 | return 0; | |
78ae2fcc | 559 | } |
560 | ||
a6afdde9 DL |
561 | ERROR("failed to determine fs type for '%s'", rootfs); |
562 | return -1; | |
563 | } | |
564 | ||
2656d231 | 565 | static int mount_rootfs_dir(const char *rootfs, const char *target) |
a6afdde9 DL |
566 | { |
567 | return mount(rootfs, target, "none", MS_BIND | MS_REC, NULL); | |
568 | } | |
569 | ||
570 | static int setup_lodev(const char *rootfs, int fd, struct loop_info64 *loinfo) | |
571 | { | |
572 | int rfd; | |
573 | int ret = -1; | |
574 | ||
575 | rfd = open(rootfs, O_RDWR); | |
576 | if (rfd < 0) { | |
577 | SYSERROR("failed to open '%s'", rootfs); | |
78ae2fcc | 578 | return -1; |
579 | } | |
580 | ||
a6afdde9 | 581 | memset(loinfo, 0, sizeof(*loinfo)); |
78ae2fcc | 582 | |
a6afdde9 | 583 | loinfo->lo_flags = LO_FLAGS_AUTOCLEAR; |
78ae2fcc | 584 | |
a6afdde9 DL |
585 | if (ioctl(fd, LOOP_SET_FD, rfd)) { |
586 | SYSERROR("failed to LOOP_SET_FD"); | |
587 | goto out; | |
78ae2fcc | 588 | } |
589 | ||
a6afdde9 DL |
590 | if (ioctl(fd, LOOP_SET_STATUS64, loinfo)) { |
591 | SYSERROR("failed to LOOP_SET_STATUS64"); | |
78ae2fcc | 592 | goto out; |
593 | } | |
594 | ||
a6afdde9 | 595 | ret = 0; |
78ae2fcc | 596 | out: |
a6afdde9 | 597 | close(rfd); |
78ae2fcc | 598 | |
a6afdde9 | 599 | return ret; |
78ae2fcc | 600 | } |
601 | ||
2656d231 | 602 | static int mount_rootfs_file(const char *rootfs, const char *target) |
78ae2fcc | 603 | { |
a6afdde9 DL |
604 | struct dirent dirent, *direntp; |
605 | struct loop_info64 loinfo; | |
9ba8130c | 606 | int ret = -1, fd = -1, rc; |
a6afdde9 DL |
607 | DIR *dir; |
608 | char path[MAXPATHLEN]; | |
78ae2fcc | 609 | |
a6afdde9 DL |
610 | dir = opendir("/dev"); |
611 | if (!dir) { | |
612 | SYSERROR("failed to open '/dev'"); | |
78ae2fcc | 613 | return -1; |
614 | } | |
615 | ||
a6afdde9 DL |
616 | while (!readdir_r(dir, &dirent, &direntp)) { |
617 | ||
618 | if (!direntp) | |
619 | break; | |
620 | ||
621 | if (!strcmp(direntp->d_name, ".")) | |
622 | continue; | |
623 | ||
624 | if (!strcmp(direntp->d_name, "..")) | |
625 | continue; | |
626 | ||
627 | if (strncmp(direntp->d_name, "loop", 4)) | |
628 | continue; | |
629 | ||
9ba8130c SH |
630 | rc = snprintf(path, MAXPATHLEN, "/dev/%s", direntp->d_name); |
631 | if (rc < 0 || rc >= MAXPATHLEN) | |
632 | continue; | |
633 | ||
a6afdde9 DL |
634 | fd = open(path, O_RDWR); |
635 | if (fd < 0) | |
636 | continue; | |
637 | ||
638 | if (ioctl(fd, LOOP_GET_STATUS64, &loinfo) == 0) { | |
639 | close(fd); | |
640 | continue; | |
641 | } | |
642 | ||
643 | if (errno != ENXIO) { | |
644 | WARN("unexpected error for ioctl on '%s': %m", | |
645 | direntp->d_name); | |
00b6be44 | 646 | close(fd); |
a6afdde9 DL |
647 | continue; |
648 | } | |
649 | ||
650 | DEBUG("found '%s' free lodev", path); | |
651 | ||
652 | ret = setup_lodev(rootfs, fd, &loinfo); | |
653 | if (!ret) | |
2656d231 | 654 | ret = mount_unknow_fs(path, target, 0); |
a6afdde9 DL |
655 | close(fd); |
656 | ||
657 | break; | |
658 | } | |
659 | ||
660 | if (closedir(dir)) | |
661 | WARN("failed to close directory"); | |
662 | ||
663 | return ret; | |
78ae2fcc | 664 | } |
665 | ||
2656d231 | 666 | static int mount_rootfs_block(const char *rootfs, const char *target) |
a6afdde9 | 667 | { |
2656d231 | 668 | return mount_unknow_fs(rootfs, target, 0); |
a6afdde9 DL |
669 | } |
670 | ||
0c547523 SH |
671 | /* |
672 | * pin_rootfs | |
673 | * if rootfs is a directory, then open ${rootfs}.hold for writing for the | |
674 | * duration of the container run, to prevent the container from marking the | |
675 | * underlying fs readonly on shutdown. | |
676 | * return -1 on error. | |
677 | * return -2 if nothing needed to be pinned. | |
678 | * return an open fd (>=0) if we pinned it. | |
679 | */ | |
680 | int pin_rootfs(const char *rootfs) | |
681 | { | |
682 | char absrootfs[MAXPATHLEN]; | |
683 | char absrootfspin[MAXPATHLEN]; | |
684 | struct stat s; | |
685 | int ret, fd; | |
686 | ||
e99ee0de | 687 | if (rootfs == NULL || strlen(rootfs) == 0) |
0d03360a | 688 | return -2; |
e99ee0de | 689 | |
0c547523 | 690 | if (!realpath(rootfs, absrootfs)) { |
9be53773 SH |
691 | INFO("failed to get real path for '%s', not pinning", rootfs); |
692 | return -2; | |
0c547523 SH |
693 | } |
694 | ||
695 | if (access(absrootfs, F_OK)) { | |
696 | SYSERROR("'%s' is not accessible", absrootfs); | |
697 | return -1; | |
698 | } | |
699 | ||
700 | if (stat(absrootfs, &s)) { | |
701 | SYSERROR("failed to stat '%s'", absrootfs); | |
702 | return -1; | |
703 | } | |
704 | ||
72f919c4 | 705 | if (!S_ISDIR(s.st_mode)) |
0c547523 SH |
706 | return -2; |
707 | ||
708 | ret = snprintf(absrootfspin, MAXPATHLEN, "%s%s", absrootfs, ".hold"); | |
709 | if (ret >= MAXPATHLEN) { | |
710 | SYSERROR("pathname too long for rootfs hold file"); | |
711 | return -1; | |
712 | } | |
713 | ||
714 | fd = open(absrootfspin, O_CREAT | O_RDWR, S_IWUSR|S_IRUSR); | |
715 | INFO("opened %s as fd %d\n", absrootfspin, fd); | |
716 | return fd; | |
717 | } | |
718 | ||
2656d231 | 719 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 720 | { |
b09ef133 | 721 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 722 | struct stat s; |
a6afdde9 | 723 | int i; |
78ae2fcc | 724 | |
a6afdde9 | 725 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 726 | |
727 | struct rootfs_type { | |
728 | int type; | |
729 | rootfs_cb cb; | |
730 | } rtfs_type[] = { | |
2656d231 DL |
731 | { S_IFDIR, mount_rootfs_dir }, |
732 | { S_IFBLK, mount_rootfs_block }, | |
733 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 734 | }; |
0ad19a3f | 735 | |
4c8ab83b | 736 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 737 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 738 | return -1; |
739 | } | |
b09ef133 | 740 | |
b09ef133 | 741 | if (access(absrootfs, F_OK)) { |
36eb9bde | 742 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 743 | return -1; |
744 | } | |
745 | ||
78ae2fcc | 746 | if (stat(absrootfs, &s)) { |
36eb9bde | 747 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 748 | return -1; |
749 | } | |
750 | ||
78ae2fcc | 751 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 752 | |
78ae2fcc | 753 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
754 | continue; | |
9b0f0477 | 755 | |
a6afdde9 | 756 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 757 | } |
9b0f0477 | 758 | |
36eb9bde | 759 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 760 | return -1; |
0ad19a3f | 761 | } |
762 | ||
4e5440c6 | 763 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 764 | { |
4e5440c6 DL |
765 | if (!utsname) |
766 | return 0; | |
0ad19a3f | 767 | |
4e5440c6 DL |
768 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
769 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 770 | return -1; |
771 | } | |
772 | ||
4e5440c6 | 773 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 774 | |
0ad19a3f | 775 | return 0; |
776 | } | |
777 | ||
33fcb7a0 | 778 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 779 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 780 | { |
7c6ef2a2 SH |
781 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
782 | int i, ret; | |
b0a33c1e | 783 | |
bc9bd0e3 DL |
784 | if (!rootfs->path) |
785 | return 0; | |
786 | ||
b0a33c1e | 787 | for (i = 0; i < tty_info->nbtty; i++) { |
788 | ||
789 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
790 | ||
7c6ef2a2 | 791 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 792 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
793 | if (ret >= sizeof(path)) { |
794 | ERROR("pathname too long for ttys"); | |
795 | return -1; | |
796 | } | |
797 | if (ttydir) { | |
798 | /* create dev/lxc/tty%d" */ | |
9ba8130c | 799 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", |
7c6ef2a2 SH |
800 | rootfs->mount, ttydir, i + 1); |
801 | if (ret >= sizeof(lxcpath)) { | |
802 | ERROR("pathname too long for ttys"); | |
803 | return -1; | |
804 | } | |
805 | ret = creat(lxcpath, 0660); | |
806 | if (ret==-1 && errno != EEXIST) { | |
807 | SYSERROR("error creating %s\n", lxcpath); | |
808 | return -1; | |
809 | } | |
4d44e274 SH |
810 | if (ret >= 0) |
811 | close(ret); | |
7c6ef2a2 SH |
812 | ret = unlink(path); |
813 | if (ret && errno != ENOENT) { | |
814 | SYSERROR("error unlinking %s\n", path); | |
815 | return -1; | |
816 | } | |
b0a33c1e | 817 | |
7c6ef2a2 SH |
818 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
819 | WARN("failed to mount '%s'->'%s'", | |
820 | pty_info->name, path); | |
821 | continue; | |
822 | } | |
13954cce | 823 | |
9ba8130c SH |
824 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
825 | if (ret >= sizeof(lxcpath)) { | |
826 | ERROR("tty pathname too long"); | |
827 | return -1; | |
828 | } | |
7c6ef2a2 SH |
829 | ret = symlink(lxcpath, path); |
830 | if (ret) { | |
831 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
832 | return -1; | |
833 | } | |
834 | } else { | |
c6883f38 SH |
835 | /* If we populated /dev, then we need to create /dev/ttyN */ |
836 | if (access(path, F_OK)) { | |
837 | ret = creat(path, 0660); | |
838 | if (ret==-1) { | |
839 | SYSERROR("error creating %s\n", path); | |
840 | /* this isn't fatal, continue */ | |
841 | } else | |
842 | close(ret); | |
843 | } | |
7c6ef2a2 SH |
844 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
845 | WARN("failed to mount '%s'->'%s'", | |
846 | pty_info->name, path); | |
847 | continue; | |
848 | } | |
b0a33c1e | 849 | } |
850 | } | |
851 | ||
cd54d859 DL |
852 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
853 | ||
b0a33c1e | 854 | return 0; |
855 | } | |
856 | ||
7a7ff0c6 | 857 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
858 | { |
859 | struct lxc_list *mountlist, *listentry, *iterator; | |
2c7d90ac | 860 | char *pivotdir, *mountpoint, *mountentry, *saveptr = NULL; |
bf601689 MH |
861 | int found; |
862 | void **cbparm; | |
863 | ||
864 | mountentry = buffer; | |
865 | cbparm = (void **)data; | |
866 | ||
867 | mountlist = cbparm[0]; | |
868 | pivotdir = cbparm[1]; | |
869 | ||
870 | /* parse entry, first field is mountname, ignore */ | |
2796cf79 | 871 | mountpoint = strtok_r(mountentry, " ", &saveptr); |
bf601689 MH |
872 | if (!mountpoint) |
873 | return -1; | |
874 | ||
875 | /* second field is mountpoint */ | |
2796cf79 | 876 | mountpoint = strtok_r(NULL, " ", &saveptr); |
bf601689 MH |
877 | if (!mountpoint) |
878 | return -1; | |
879 | ||
880 | /* only consider mountpoints below old root fs */ | |
881 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
882 | return 0; | |
883 | ||
884 | /* filter duplicate mountpoints */ | |
885 | found = 0; | |
886 | lxc_list_for_each(iterator, mountlist) { | |
887 | if (!strcmp(iterator->elem, mountpoint)) { | |
888 | found = 1; | |
889 | break; | |
890 | } | |
891 | } | |
892 | if (found) | |
893 | return 0; | |
894 | ||
895 | /* add entry to list */ | |
896 | listentry = malloc(sizeof(*listentry)); | |
897 | if (!listentry) { | |
898 | SYSERROR("malloc for mountpoint listentry failed"); | |
899 | return -1; | |
900 | } | |
901 | ||
902 | listentry->elem = strdup(mountpoint); | |
903 | if (!listentry->elem) { | |
904 | SYSERROR("strdup failed"); | |
00b6be44 | 905 | free(listentry); |
bf601689 MH |
906 | return -1; |
907 | } | |
908 | lxc_list_add_tail(mountlist, listentry); | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
cc6f6dd7 | 913 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 914 | { |
2382ecff | 915 | char path[MAXPATHLEN]; |
bf601689 | 916 | void *cbparm[2]; |
9ebb03ad | 917 | struct lxc_list mountlist, *iterator, *next; |
bf601689 | 918 | int ok, still_mounted, last_still_mounted; |
9ba8130c | 919 | int rc; |
bf601689 MH |
920 | |
921 | /* read and parse /proc/mounts in old root fs */ | |
922 | lxc_list_init(&mountlist); | |
923 | ||
cc6f6dd7 | 924 | /* oldrootfs is on the top tree directory now */ |
9ba8130c SH |
925 | rc = snprintf(path, sizeof(path), "/%s", oldrootfs); |
926 | if (rc >= sizeof(path)) { | |
927 | ERROR("rootfs name too long"); | |
928 | return -1; | |
929 | } | |
bf601689 | 930 | cbparm[0] = &mountlist; |
bf601689 | 931 | |
cc6f6dd7 | 932 | cbparm[1] = strdup(path); |
bf601689 MH |
933 | if (!cbparm[1]) { |
934 | SYSERROR("strdup failed"); | |
935 | return -1; | |
936 | } | |
937 | ||
9ba8130c SH |
938 | rc = snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
939 | if (rc >= sizeof(path)) { | |
940 | ERROR("container proc/mounts name too long"); | |
941 | return -1; | |
942 | } | |
cc6f6dd7 DL |
943 | |
944 | ok = lxc_file_for_each_line(path, | |
945 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
946 | if (ok < 0) { |
947 | SYSERROR("failed to read or parse mount list '%s'", path); | |
948 | return -1; | |
949 | } | |
950 | ||
951 | /* umount filesystems until none left or list no longer shrinks */ | |
952 | still_mounted = 0; | |
953 | do { | |
954 | last_still_mounted = still_mounted; | |
955 | still_mounted = 0; | |
956 | ||
9ebb03ad | 957 | lxc_list_for_each_safe(iterator, &mountlist, next) { |
bf601689 | 958 | |
c08556c6 | 959 | /* umount normally */ |
bf601689 MH |
960 | if (!umount(iterator->elem)) { |
961 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
962 | lxc_list_del(iterator); | |
963 | continue; | |
964 | } | |
965 | ||
bf601689 MH |
966 | still_mounted++; |
967 | } | |
7df119ee | 968 | |
bf601689 MH |
969 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
970 | ||
7df119ee | 971 | |
c08556c6 DL |
972 | lxc_list_for_each(iterator, &mountlist) { |
973 | ||
974 | /* let's try a lazy umount */ | |
975 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
976 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
977 | continue; | |
978 | } | |
979 | ||
980 | /* be more brutal (nfs) */ | |
981 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
982 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
983 | continue; | |
984 | } | |
985 | ||
7df119ee | 986 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 987 | } |
bf601689 | 988 | |
cc6f6dd7 DL |
989 | return 0; |
990 | } | |
991 | ||
992 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
993 | { | |
994 | char path[MAXPATHLEN]; | |
995 | int remove_pivotdir = 0; | |
9ba8130c | 996 | int rc; |
cc6f6dd7 DL |
997 | |
998 | /* change into new root fs */ | |
999 | if (chdir(rootfs)) { | |
1000 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
1001 | return -1; | |
1002 | } | |
1003 | ||
1004 | if (!pivotdir) | |
30c5d292 | 1005 | pivotdir = "lxc_putold"; |
cc6f6dd7 | 1006 | |
4f9293b1 | 1007 | /* compute the full path to pivotdir under rootfs */ |
9ba8130c SH |
1008 | rc = snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
1009 | if (rc >= sizeof(path)) { | |
1010 | ERROR("pivot dir name too long"); | |
1011 | return -1; | |
1012 | } | |
cc6f6dd7 DL |
1013 | |
1014 | if (access(path, F_OK)) { | |
1015 | ||
1016 | if (mkdir_p(path, 0755)) { | |
1017 | SYSERROR("failed to create pivotdir '%s'", path); | |
1018 | return -1; | |
1019 | } | |
1020 | ||
1021 | remove_pivotdir = 1; | |
1022 | DEBUG("created '%s' directory", path); | |
1023 | } | |
1024 | ||
1025 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
1026 | ||
1027 | /* pivot_root into our new root fs */ | |
1028 | if (pivot_root(".", path)) { | |
1029 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
1030 | return -1; |
1031 | } | |
cc6f6dd7 DL |
1032 | |
1033 | if (chdir("/")) { | |
1034 | SYSERROR("can't chdir to / after pivot_root"); | |
1035 | return -1; | |
1036 | } | |
1037 | ||
1038 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
1039 | ||
1040 | /* we switch from absolute path to relative path */ | |
1041 | if (umount_oldrootfs(pivotdir)) | |
1042 | return -1; | |
bf601689 | 1043 | |
c08556c6 DL |
1044 | /* remove temporary mount point, we don't consider the removing |
1045 | * as fatal */ | |
a91d897a FW |
1046 | if (remove_pivotdir && rmdir(pivotdir)) |
1047 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 1048 | |
bf601689 MH |
1049 | return 0; |
1050 | } | |
1051 | ||
91c3830e SH |
1052 | /* |
1053 | * Do we want to add options for max size of /dev and a file to | |
1054 | * specify which devices to create? | |
1055 | */ | |
1056 | static int mount_autodev(char *root) | |
1057 | { | |
1058 | int ret; | |
1059 | char path[MAXPATHLEN]; | |
1060 | ||
1061 | INFO("Mounting /dev under %s\n", root); | |
1062 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); | |
1063 | if (ret < 0 || ret > MAXPATHLEN) | |
1064 | return -1; | |
1065 | ret = mount("none", path, "tmpfs", 0, "size=100000"); | |
1066 | if (ret) { | |
1067 | SYSERROR("Failed to mount /dev at %s\n", root); | |
1068 | return -1; | |
1069 | } | |
1070 | ret = snprintf(path, MAXPATHLEN, "%s/dev/pts", root); | |
1071 | if (ret < 0 || ret >= MAXPATHLEN) | |
1072 | return -1; | |
1073 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
1074 | if (ret) { | |
1075 | SYSERROR("Failed to create /dev/pts in container"); | |
1076 | return -1; | |
1077 | } | |
1078 | ||
1079 | INFO("Mounted /dev under %s\n", root); | |
1080 | return 0; | |
1081 | } | |
1082 | ||
c6883f38 SH |
1083 | struct lxc_devs { |
1084 | char *name; | |
1085 | mode_t mode; | |
1086 | int maj; | |
1087 | int min; | |
1088 | }; | |
1089 | ||
1090 | struct lxc_devs lxc_devs[] = { | |
1091 | { "null", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 3 }, | |
1092 | { "zero", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 5 }, | |
1093 | { "full", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 7 }, | |
1094 | { "urandom", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 9 }, | |
1095 | { "random", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 8 }, | |
1096 | { "tty", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 5, 0 }, | |
1097 | { "console", S_IFCHR | S_IRUSR | S_IWUSR, 5, 1 }, | |
1098 | }; | |
1099 | ||
c6883f38 SH |
1100 | static int setup_autodev(char *root) |
1101 | { | |
1102 | int ret; | |
1103 | struct lxc_devs *d; | |
1104 | char path[MAXPATHLEN]; | |
1105 | int i; | |
3a32201c | 1106 | mode_t cmask; |
c6883f38 | 1107 | |
91c3830e SH |
1108 | INFO("Creating initial consoles under %s/dev\n", root); |
1109 | ||
c6883f38 | 1110 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); |
91c3830e SH |
1111 | if (ret < 0 || ret >= MAXPATHLEN) { |
1112 | ERROR("Error calculating container /dev location"); | |
c6883f38 | 1113 | return -1; |
f7bee6c6 | 1114 | } |
91c3830e SH |
1115 | |
1116 | INFO("Populating /dev under %s\n", root); | |
3a32201c | 1117 | cmask = umask(S_IXUSR | S_IXGRP | S_IXOTH); |
c6883f38 SH |
1118 | for (i = 0; i < sizeof(lxc_devs) / sizeof(lxc_devs[0]); i++) { |
1119 | d = &lxc_devs[i]; | |
1120 | ret = snprintf(path, MAXPATHLEN, "%s/dev/%s", root, d->name); | |
1121 | if (ret < 0 || ret >= MAXPATHLEN) | |
1122 | return -1; | |
1123 | ret = mknod(path, d->mode, makedev(d->maj, d->min)); | |
91c3830e | 1124 | if (ret && errno != EEXIST) { |
c6883f38 SH |
1125 | SYSERROR("Error creating %s\n", d->name); |
1126 | return -1; | |
1127 | } | |
1128 | } | |
3a32201c | 1129 | umask(cmask); |
c6883f38 SH |
1130 | |
1131 | INFO("Populated /dev under %s\n", root); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
cc28d0b0 SH |
1135 | /* |
1136 | * Detect whether / is mounted MS_SHARED. The only way I know of to | |
1137 | * check that is through /proc/self/mountinfo. | |
1138 | * I'm only checking for /. If the container rootfs or mount location | |
1139 | * is MS_SHARED, but not '/', then you're out of luck - figuring that | |
1140 | * out would be too much work to be worth it. | |
1141 | */ | |
1142 | #define LINELEN 4096 | |
1143 | int detect_shared_rootfs(void) | |
1144 | { | |
1145 | char buf[LINELEN], *p; | |
1146 | FILE *f; | |
1147 | int i; | |
1148 | char *p2; | |
1149 | ||
1150 | f = fopen("/proc/self/mountinfo", "r"); | |
1151 | if (!f) | |
1152 | return 0; | |
1153 | while ((p = fgets(buf, LINELEN, f))) { | |
1154 | INFO("looking at .%s.", p); | |
1155 | for (p = buf, i=0; p && i < 4; i++) | |
1156 | p = index(p+1, ' '); | |
1157 | if (!p) | |
1158 | continue; | |
1159 | p2 = index(p+1, ' '); | |
1160 | if (!p2) | |
1161 | continue; | |
1162 | *p2 = '\0'; | |
1163 | INFO("now p is .%s.", p); | |
1164 | if (strcmp(p+1, "/") == 0) { | |
1165 | // this is '/'. is it shared? | |
1166 | p = index(p2+1, ' '); | |
ab81cef0 | 1167 | if (p && strstr(p, "shared:")) { |
00b6be44 | 1168 | fclose(f); |
cc28d0b0 | 1169 | return 1; |
00b6be44 | 1170 | } |
cc28d0b0 SH |
1171 | } |
1172 | } | |
1173 | fclose(f); | |
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * I'll forgive you for asking whether all of this is needed :) The | |
1179 | * answer is yes. | |
1180 | * pivot_root will fail if the new root, the put_old dir, or the parent | |
1181 | * of current->fs->root are MS_SHARED. (parent of current->fs_root may | |
1182 | * or may not be current->fs_root - if we assumed it always was, we could | |
1183 | * just mount --make-rslave /). So, | |
1184 | * 1. mount a tiny tmpfs to be parent of current->fs->root. | |
1185 | * 2. make that MS_SLAVE | |
1186 | * 3. make a 'root' directory under that | |
1187 | * 4. mount --rbind / under the $tinyroot/root. | |
1188 | * 5. make that rslave | |
1189 | * 6. chdir and chroot into $tinyroot/root | |
1190 | * 7. $tinyroot will be unmounted by our parent in start.c | |
1191 | */ | |
1192 | static int chroot_into_slave(struct lxc_conf *conf) | |
1193 | { | |
1194 | char path[MAXPATHLEN]; | |
1195 | const char *destpath = conf->rootfs.mount; | |
1196 | int ret; | |
1197 | ||
1198 | if (mount(destpath, destpath, NULL, MS_BIND, 0)) { | |
1199 | SYSERROR("failed to mount %s bind", destpath); | |
1200 | return -1; | |
1201 | } | |
1202 | if (mount("", destpath, NULL, MS_SLAVE, 0)) { | |
1203 | SYSERROR("failed to make %s slave", destpath); | |
1204 | return -1; | |
1205 | } | |
1206 | if (mount("none", destpath, "tmpfs", 0, "size=10000")) { | |
1207 | SYSERROR("Failed to mount tmpfs / at %s", destpath); | |
1208 | return -1; | |
1209 | } | |
1210 | ret = snprintf(path, MAXPATHLEN, "%s/root", destpath); | |
1211 | if (ret < 0 || ret >= MAXPATHLEN) { | |
1212 | ERROR("out of memory making root path"); | |
1213 | return -1; | |
1214 | } | |
1215 | if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)) { | |
1216 | SYSERROR("Failed to create /dev/pts in container"); | |
1217 | return -1; | |
1218 | } | |
1219 | if (mount("/", path, NULL, MS_BIND|MS_REC, 0)) { | |
1220 | SYSERROR("Failed to rbind mount / to %s", path); | |
1221 | return -1; | |
1222 | } | |
1223 | if (mount("", destpath, NULL, MS_SLAVE|MS_REC, 0)) { | |
1224 | SYSERROR("Failed to make tmp-/ at %s rslave", path); | |
1225 | return -1; | |
1226 | } | |
1227 | if (chdir(path)) { | |
1228 | SYSERROR("Failed to chdir into tmp-/"); | |
1229 | return -1; | |
1230 | } | |
1231 | if (chroot(path)) { | |
1232 | SYSERROR("Failed to chroot into tmp-/"); | |
1233 | return -1; | |
1234 | } | |
1235 | INFO("Chrooted into tmp-/ at %s\n", path); | |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | static int setup_rootfs(struct lxc_conf *conf) | |
0ad19a3f | 1240 | { |
cc28d0b0 SH |
1241 | const struct lxc_rootfs *rootfs = &conf->rootfs; |
1242 | ||
a0f379bf DW |
1243 | if (!rootfs->path) { |
1244 | if (mount("", "/", NULL, MS_SLAVE|MS_REC, 0)) { | |
1245 | SYSERROR("Failed to make / rslave"); | |
1246 | return -1; | |
1247 | } | |
c69bd12f | 1248 | return 0; |
a0f379bf | 1249 | } |
0ad19a3f | 1250 | |
12297168 | 1251 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 1252 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 1253 | rootfs->mount); |
b1789442 DL |
1254 | return -1; |
1255 | } | |
1256 | ||
cc28d0b0 SH |
1257 | if (detect_shared_rootfs()) { |
1258 | if (chroot_into_slave(conf)) { | |
1259 | ERROR("Failed to chroot into slave /"); | |
1260 | return -1; | |
1261 | } | |
1262 | } | |
1263 | ||
9be53773 SH |
1264 | // First try mounting rootfs using a bdev |
1265 | struct bdev *bdev = bdev_init(rootfs->path, rootfs->mount, NULL); | |
1266 | if (bdev && bdev->ops->mount(bdev) == 0) { | |
59d66af2 | 1267 | bdev_put(bdev); |
9be53773 SH |
1268 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
1269 | return 0; | |
1270 | } | |
59d66af2 SH |
1271 | if (bdev) |
1272 | bdev_put(bdev); | |
2656d231 | 1273 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 1274 | ERROR("failed to mount rootfs"); |
c3f0a28c | 1275 | return -1; |
1276 | } | |
0ad19a3f | 1277 | |
12297168 | 1278 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 1279 | |
ac778708 DL |
1280 | return 0; |
1281 | } | |
1282 | ||
1283 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
1284 | { | |
ac778708 DL |
1285 | if (!rootfs->path) |
1286 | return 0; | |
1287 | ||
12297168 | 1288 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 1289 | ERROR("failed to setup pivot root"); |
25368b52 | 1290 | return -1; |
c69bd12f DL |
1291 | } |
1292 | ||
25368b52 | 1293 | return 0; |
0ad19a3f | 1294 | } |
1295 | ||
d852c78c | 1296 | static int setup_pts(int pts) |
3c26f34e | 1297 | { |
77890c6d SW |
1298 | char target[PATH_MAX]; |
1299 | ||
d852c78c DL |
1300 | if (!pts) |
1301 | return 0; | |
3c26f34e | 1302 | |
1303 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 1304 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 1305 | return -1; |
1306 | } | |
1307 | ||
a6afdde9 DL |
1308 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
1309 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 1310 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 1311 | return -1; |
1312 | } | |
1313 | ||
3c26f34e | 1314 | if (access("/dev/ptmx", F_OK)) { |
1315 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
1316 | goto out; | |
36eb9bde | 1317 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1318 | return -1; |
1319 | } | |
1320 | ||
77890c6d SW |
1321 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
1322 | goto out; | |
1323 | ||
3c26f34e | 1324 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
1325 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 1326 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1327 | return -1; |
1328 | } | |
cd54d859 DL |
1329 | |
1330 | INFO("created new pts instance"); | |
d852c78c | 1331 | |
3c26f34e | 1332 | out: |
1333 | return 0; | |
1334 | } | |
1335 | ||
cccc74b5 DL |
1336 | static int setup_personality(int persona) |
1337 | { | |
6ff05e18 | 1338 | #if HAVE_SYS_PERSONALITY_H |
cccc74b5 DL |
1339 | if (persona == -1) |
1340 | return 0; | |
1341 | ||
1342 | if (personality(persona) < 0) { | |
1343 | SYSERROR("failed to set personality to '0x%x'", persona); | |
1344 | return -1; | |
1345 | } | |
1346 | ||
1347 | INFO("set personality to '0x%x'", persona); | |
6ff05e18 | 1348 | #endif |
cccc74b5 DL |
1349 | |
1350 | return 0; | |
1351 | } | |
1352 | ||
7c6ef2a2 | 1353 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 1354 | const struct lxc_console *console) |
6e590161 | 1355 | { |
63376d7d DL |
1356 | char path[MAXPATHLEN]; |
1357 | struct stat s; | |
7c6ef2a2 | 1358 | int ret; |
52e35957 | 1359 | |
7c6ef2a2 SH |
1360 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
1361 | if (ret >= sizeof(path)) { | |
1362 | ERROR("console path too long\n"); | |
1363 | return -1; | |
1364 | } | |
52e35957 | 1365 | |
63376d7d | 1366 | if (access(path, F_OK)) { |
466978b0 | 1367 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 1368 | return 0; |
52e35957 DL |
1369 | } |
1370 | ||
b5159817 DE |
1371 | if (console->master < 0) { |
1372 | INFO("no console"); | |
f78a1f32 DL |
1373 | return 0; |
1374 | } | |
ed502555 | 1375 | |
63376d7d DL |
1376 | if (stat(path, &s)) { |
1377 | SYSERROR("failed to stat '%s'", path); | |
1378 | return -1; | |
1379 | } | |
1380 | ||
1381 | if (chmod(console->name, s.st_mode)) { | |
1382 | SYSERROR("failed to set mode '0%o' to '%s'", | |
1383 | s.st_mode, console->name); | |
1384 | return -1; | |
1385 | } | |
13954cce | 1386 | |
63376d7d DL |
1387 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
1388 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 1389 | return -1; |
1390 | } | |
1391 | ||
63376d7d | 1392 | INFO("console has been setup"); |
7c6ef2a2 SH |
1393 | return 0; |
1394 | } | |
1395 | ||
1396 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
1397 | const struct lxc_console *console, | |
1398 | char *ttydir) | |
1399 | { | |
1400 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
1401 | int ret; | |
1402 | ||
1403 | /* create rootfs/dev/<ttydir> directory */ | |
1404 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
1405 | ttydir); | |
1406 | if (ret >= sizeof(path)) | |
1407 | return -1; | |
1408 | ret = mkdir(path, 0755); | |
1409 | if (ret && errno != EEXIST) { | |
1410 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
1411 | return -1; | |
1412 | } | |
1413 | INFO("created %s\n", path); | |
1414 | ||
1415 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
1416 | rootfs->mount, ttydir); | |
1417 | if (ret >= sizeof(lxcpath)) { | |
1418 | ERROR("console path too long\n"); | |
1419 | return -1; | |
1420 | } | |
1421 | ||
1422 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
1423 | ret = unlink(path); | |
1424 | if (ret && errno != ENOENT) { | |
1425 | SYSERROR("error unlinking %s\n", path); | |
1426 | return -1; | |
1427 | } | |
1428 | ||
1429 | ret = creat(lxcpath, 0660); | |
1430 | if (ret==-1 && errno != EEXIST) { | |
1431 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
1432 | return -1; | |
1433 | } | |
4d44e274 SH |
1434 | if (ret >= 0) |
1435 | close(ret); | |
7c6ef2a2 | 1436 | |
b5159817 DE |
1437 | if (console->master < 0) { |
1438 | INFO("no console"); | |
7c6ef2a2 SH |
1439 | return 0; |
1440 | } | |
1441 | ||
1442 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
1443 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
1444 | return -1; | |
1445 | } | |
1446 | ||
1447 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
9ba8130c SH |
1448 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); |
1449 | if (ret >= sizeof(lxcpath)) { | |
1450 | ERROR("lxc/console path too long"); | |
1451 | return -1; | |
1452 | } | |
7c6ef2a2 SH |
1453 | ret = symlink(lxcpath, path); |
1454 | if (ret) { | |
1455 | SYSERROR("failed to create symlink for console"); | |
1456 | return -1; | |
1457 | } | |
1458 | ||
1459 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 1460 | |
6e590161 | 1461 | return 0; |
1462 | } | |
1463 | ||
7c6ef2a2 SH |
1464 | static int setup_console(const struct lxc_rootfs *rootfs, |
1465 | const struct lxc_console *console, | |
1466 | char *ttydir) | |
1467 | { | |
1468 | /* We don't have a rootfs, /dev/console will be shared */ | |
1469 | if (!rootfs->path) | |
1470 | return 0; | |
1471 | if (!ttydir) | |
1472 | return setup_dev_console(rootfs, console); | |
1473 | ||
1474 | return setup_ttydir_console(rootfs, console, ttydir); | |
1475 | } | |
1476 | ||
1bd051a6 SH |
1477 | static int setup_kmsg(const struct lxc_rootfs *rootfs, |
1478 | const struct lxc_console *console) | |
1479 | { | |
1480 | char kpath[MAXPATHLEN]; | |
1481 | int ret; | |
1482 | ||
222fea5a DE |
1483 | if (!rootfs->path) |
1484 | return 0; | |
1bd051a6 SH |
1485 | ret = snprintf(kpath, sizeof(kpath), "%s/dev/kmsg", rootfs->mount); |
1486 | if (ret < 0 || ret >= sizeof(kpath)) | |
1487 | return -1; | |
1488 | ||
1489 | ret = unlink(kpath); | |
1490 | if (ret && errno != ENOENT) { | |
1491 | SYSERROR("error unlinking %s\n", kpath); | |
1492 | return -1; | |
1493 | } | |
1494 | ||
1495 | ret = symlink("console", kpath); | |
1496 | if (ret) { | |
1497 | SYSERROR("failed to create symlink for kmsg"); | |
1498 | return -1; | |
1499 | } | |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
998ac676 RT |
1504 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
1505 | { | |
1506 | struct mount_opt *mo; | |
1507 | ||
1508 | /* If opt is found in mount_opt, set or clear flags. | |
1509 | * Otherwise append it to data. */ | |
1510 | ||
1511 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1512 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1513 | if (mo->clear) | |
1514 | *flags &= ~mo->flag; | |
1515 | else | |
1516 | *flags |= mo->flag; | |
1517 | return; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | if (strlen(*data)) | |
1522 | strcat(*data, ","); | |
1523 | strcat(*data, opt); | |
1524 | } | |
1525 | ||
911324ef | 1526 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1527 | char **mntdata) |
1528 | { | |
1529 | char *s, *data; | |
1530 | char *p, *saveptr = NULL; | |
1531 | ||
911324ef | 1532 | *mntdata = NULL; |
91656ce5 | 1533 | *mntflags = 0L; |
911324ef DL |
1534 | |
1535 | if (!mntopts) | |
998ac676 RT |
1536 | return 0; |
1537 | ||
911324ef | 1538 | s = strdup(mntopts); |
998ac676 | 1539 | if (!s) { |
36eb9bde | 1540 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1541 | return -1; |
1542 | } | |
1543 | ||
1544 | data = malloc(strlen(s) + 1); | |
1545 | if (!data) { | |
36eb9bde | 1546 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1547 | free(s); |
1548 | return -1; | |
1549 | } | |
1550 | *data = 0; | |
1551 | ||
1552 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1553 | p = strtok_r(NULL, ",", &saveptr)) | |
1554 | parse_mntopt(p, mntflags, &data); | |
1555 | ||
1556 | if (*data) | |
1557 | *mntdata = data; | |
1558 | else | |
1559 | free(data); | |
1560 | free(s); | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
911324ef DL |
1565 | static int mount_entry(const char *fsname, const char *target, |
1566 | const char *fstype, unsigned long mountflags, | |
1567 | const char *data) | |
1568 | { | |
1569 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1570 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1571 | return -1; | |
1572 | } | |
1573 | ||
1574 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1575 | ||
1576 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1577 | fsname, target); | |
1578 | ||
1579 | if (mount(fsname, target, fstype, | |
1580 | mountflags | MS_REMOUNT, data)) { | |
1581 | SYSERROR("failed to mount '%s' on '%s'", | |
1582 | fsname, target); | |
1583 | return -1; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1588 | ||
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1593 | { |
998ac676 RT |
1594 | unsigned long mntflags; |
1595 | char *mntdata; | |
911324ef DL |
1596 | int ret; |
1597 | ||
1598 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1599 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1600 | return -1; | |
1601 | } | |
1602 | ||
1603 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1604 | mntent->mnt_type, mntflags, mntdata); | |
1605 | ||
68c152ef SH |
1606 | if (hasmntopt(mntent, "optional") != NULL) |
1607 | ret = 0; | |
1608 | ||
911324ef DL |
1609 | free(mntdata); |
1610 | ||
1611 | return ret; | |
1612 | } | |
1613 | ||
1614 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
80a881b2 SH |
1615 | const struct lxc_rootfs *rootfs, |
1616 | const char *lxc_name) | |
911324ef | 1617 | { |
013bd428 | 1618 | char *aux; |
59760f5d | 1619 | char path[MAXPATHLEN]; |
911324ef DL |
1620 | unsigned long mntflags; |
1621 | char *mntdata; | |
80a881b2 | 1622 | int r, ret = 0, offset; |
67e571de | 1623 | const char *lxcpath; |
0ad19a3f | 1624 | |
911324ef DL |
1625 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1626 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1627 | return -1; | |
1628 | } | |
1bc60a65 | 1629 | |
2a59a681 SH |
1630 | lxcpath = default_lxc_path(); |
1631 | if (!lxcpath) { | |
1632 | ERROR("Out of memory"); | |
1633 | return -1; | |
1634 | } | |
1635 | ||
80a881b2 | 1636 | /* if rootfs->path is a blockdev path, allow container fstab to |
2a59a681 SH |
1637 | * use $lxcpath/CN/rootfs as the target prefix */ |
1638 | r = snprintf(path, MAXPATHLEN, "%s/%s/rootfs", lxcpath, lxc_name); | |
80a881b2 SH |
1639 | if (r < 0 || r >= MAXPATHLEN) |
1640 | goto skipvarlib; | |
1641 | ||
1642 | aux = strstr(mntent->mnt_dir, path); | |
1643 | if (aux) { | |
1644 | offset = strlen(path); | |
1645 | goto skipabs; | |
1646 | } | |
1647 | ||
1648 | skipvarlib: | |
013bd428 DL |
1649 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1650 | if (!aux) { | |
1651 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1652 | goto out; | |
1653 | } | |
80a881b2 SH |
1654 | offset = strlen(rootfs->path); |
1655 | ||
1656 | skipabs: | |
013bd428 | 1657 | |
9ba8130c | 1658 | r = snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
80a881b2 SH |
1659 | aux + offset); |
1660 | if (r < 0 || r >= MAXPATHLEN) { | |
1661 | WARN("pathnme too long for '%s'", mntent->mnt_dir); | |
1662 | ret = -1; | |
1663 | goto out; | |
1664 | } | |
1665 | ||
d330fe7b | 1666 | |
013bd428 | 1667 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1668 | mntflags, mntdata); |
0ad19a3f | 1669 | |
68c152ef SH |
1670 | if (hasmntopt(mntent, "optional") != NULL) |
1671 | ret = 0; | |
1672 | ||
013bd428 | 1673 | out: |
911324ef DL |
1674 | free(mntdata); |
1675 | return ret; | |
1676 | } | |
d330fe7b | 1677 | |
911324ef DL |
1678 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1679 | const char *rootfs) | |
1680 | { | |
1681 | char path[MAXPATHLEN]; | |
1682 | unsigned long mntflags; | |
1683 | char *mntdata; | |
1684 | int ret; | |
d330fe7b | 1685 | |
911324ef DL |
1686 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1687 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1688 | return -1; | |
1689 | } | |
d330fe7b | 1690 | |
911324ef | 1691 | /* relative to root mount point */ |
9ba8130c SH |
1692 | ret = snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); |
1693 | if (ret >= sizeof(path)) { | |
1694 | ERROR("path name too long"); | |
1695 | return -1; | |
1696 | } | |
911324ef DL |
1697 | |
1698 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1699 | mntflags, mntdata); | |
1700 | ||
68c152ef SH |
1701 | if (hasmntopt(mntent, "optional") != NULL) |
1702 | ret = 0; | |
1703 | ||
911324ef | 1704 | free(mntdata); |
998ac676 | 1705 | |
911324ef DL |
1706 | return ret; |
1707 | } | |
1708 | ||
80a881b2 SH |
1709 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file, |
1710 | const char *lxc_name) | |
911324ef DL |
1711 | { |
1712 | struct mntent *mntent; | |
1713 | int ret = -1; | |
e76b8764 | 1714 | |
911324ef | 1715 | while ((mntent = getmntent(file))) { |
e76b8764 | 1716 | |
911324ef DL |
1717 | if (!rootfs->path) { |
1718 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1719 | goto out; |
911324ef | 1720 | continue; |
e76b8764 CDC |
1721 | } |
1722 | ||
911324ef DL |
1723 | /* We have a separate root, mounts are relative to it */ |
1724 | if (mntent->mnt_dir[0] != '/') { | |
1725 | if (mount_entry_on_relative_rootfs(mntent, | |
1726 | rootfs->mount)) | |
1727 | goto out; | |
1728 | continue; | |
1729 | } | |
cd54d859 | 1730 | |
80a881b2 | 1731 | if (mount_entry_on_absolute_rootfs(mntent, rootfs, lxc_name)) |
911324ef | 1732 | goto out; |
0ad19a3f | 1733 | } |
cd54d859 | 1734 | |
0ad19a3f | 1735 | ret = 0; |
cd54d859 DL |
1736 | |
1737 | INFO("mount points have been setup"); | |
0ad19a3f | 1738 | out: |
e7938e9e MN |
1739 | return ret; |
1740 | } | |
1741 | ||
80a881b2 SH |
1742 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab, |
1743 | const char *lxc_name) | |
e7938e9e MN |
1744 | { |
1745 | FILE *file; | |
1746 | int ret; | |
1747 | ||
1748 | if (!fstab) | |
1749 | return 0; | |
1750 | ||
1751 | file = setmntent(fstab, "r"); | |
1752 | if (!file) { | |
1753 | SYSERROR("failed to use '%s'", fstab); | |
1754 | return -1; | |
1755 | } | |
1756 | ||
80a881b2 | 1757 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e | 1758 | |
0ad19a3f | 1759 | endmntent(file); |
1760 | return ret; | |
1761 | } | |
1762 | ||
80a881b2 SH |
1763 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount, |
1764 | const char *lxc_name) | |
e7938e9e MN |
1765 | { |
1766 | FILE *file; | |
1767 | struct lxc_list *iterator; | |
1768 | char *mount_entry; | |
1769 | int ret; | |
1770 | ||
1771 | file = tmpfile(); | |
1772 | if (!file) { | |
1773 | ERROR("tmpfile error: %m"); | |
1774 | return -1; | |
1775 | } | |
1776 | ||
1777 | lxc_list_for_each(iterator, mount) { | |
1778 | mount_entry = iterator->elem; | |
1d6b1976 | 1779 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1780 | } |
1781 | ||
1782 | rewind(file); | |
1783 | ||
80a881b2 | 1784 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e MN |
1785 | |
1786 | fclose(file); | |
1787 | return ret; | |
1788 | } | |
1789 | ||
81810dd1 DL |
1790 | static int setup_caps(struct lxc_list *caps) |
1791 | { | |
1792 | struct lxc_list *iterator; | |
1793 | char *drop_entry; | |
d55bc1ad | 1794 | char *ptr; |
81810dd1 DL |
1795 | int i, capid; |
1796 | ||
1797 | lxc_list_for_each(iterator, caps) { | |
1798 | ||
1799 | drop_entry = iterator->elem; | |
1800 | ||
1801 | capid = -1; | |
1802 | ||
1803 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1804 | ||
1805 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1806 | continue; | |
1807 | ||
1808 | capid = caps_opt[i].value; | |
1809 | break; | |
1810 | } | |
1811 | ||
d55bc1ad CS |
1812 | if (capid < 0) { |
1813 | /* try to see if it's numeric, so the user may specify | |
1814 | * capabilities that the running kernel knows about but | |
1815 | * we don't */ | |
1816 | capid = strtol(drop_entry, &ptr, 10); | |
1817 | if (!ptr || *ptr != '\0' || | |
1818 | capid == LONG_MIN || capid == LONG_MAX) | |
1819 | /* not a valid number */ | |
1820 | capid = -1; | |
1821 | else if (capid > lxc_caps_last_cap()) | |
1822 | /* we have a number but it's not a valid | |
1823 | * capability */ | |
1824 | capid = -1; | |
1825 | } | |
1826 | ||
81810dd1 | 1827 | if (capid < 0) { |
1e11be34 DL |
1828 | ERROR("unknown capability %s", drop_entry); |
1829 | return -1; | |
81810dd1 DL |
1830 | } |
1831 | ||
1832 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1833 | ||
1834 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1835 | SYSERROR("failed to remove %s capability", drop_entry); | |
1836 | return -1; | |
1837 | } | |
1838 | ||
1839 | } | |
1840 | ||
1fb86a7c SH |
1841 | DEBUG("capabilities have been setup"); |
1842 | ||
1843 | return 0; | |
1844 | } | |
1845 | ||
1846 | static int dropcaps_except(struct lxc_list *caps) | |
1847 | { | |
1848 | struct lxc_list *iterator; | |
1849 | char *keep_entry; | |
1850 | char *ptr; | |
1851 | int i, capid; | |
1852 | int numcaps = lxc_caps_last_cap() + 1; | |
1853 | INFO("found %d capabilities\n", numcaps); | |
1854 | ||
2caf9a97 SH |
1855 | if (numcaps <= 0 || numcaps > 200) |
1856 | return -1; | |
1857 | ||
1fb86a7c SH |
1858 | // caplist[i] is 1 if we keep capability i |
1859 | int *caplist = alloca(numcaps * sizeof(int)); | |
1860 | memset(caplist, 0, numcaps * sizeof(int)); | |
1861 | ||
1862 | lxc_list_for_each(iterator, caps) { | |
1863 | ||
1864 | keep_entry = iterator->elem; | |
1865 | ||
1866 | capid = -1; | |
1867 | ||
1868 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1869 | ||
1870 | if (strcmp(keep_entry, caps_opt[i].name)) | |
1871 | continue; | |
1872 | ||
1873 | capid = caps_opt[i].value; | |
1874 | break; | |
1875 | } | |
1876 | ||
1877 | if (capid < 0) { | |
1878 | /* try to see if it's numeric, so the user may specify | |
1879 | * capabilities that the running kernel knows about but | |
1880 | * we don't */ | |
1881 | capid = strtol(keep_entry, &ptr, 10); | |
1882 | if (!ptr || *ptr != '\0' || | |
1883 | capid == LONG_MIN || capid == LONG_MAX) | |
1884 | /* not a valid number */ | |
1885 | capid = -1; | |
1886 | else if (capid > lxc_caps_last_cap()) | |
1887 | /* we have a number but it's not a valid | |
1888 | * capability */ | |
1889 | capid = -1; | |
1890 | } | |
1891 | ||
1892 | if (capid < 0) { | |
1893 | ERROR("unknown capability %s", keep_entry); | |
1894 | return -1; | |
1895 | } | |
1896 | ||
1897 | DEBUG("drop capability '%s' (%d)", keep_entry, capid); | |
1898 | ||
1899 | caplist[capid] = 1; | |
1900 | } | |
1901 | for (i=0; i<numcaps; i++) { | |
1902 | if (caplist[i]) | |
1903 | continue; | |
1904 | if (prctl(PR_CAPBSET_DROP, i, 0, 0, 0)) { | |
1905 | SYSERROR("failed to remove capability %d", i); | |
1906 | return -1; | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | DEBUG("capabilities have been setup"); | |
81810dd1 DL |
1911 | |
1912 | return 0; | |
1913 | } | |
1914 | ||
0ad19a3f | 1915 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1916 | { | |
1917 | struct sockaddr sockaddr; | |
1918 | struct ifreq ifr; | |
1919 | int ret, fd; | |
1920 | ||
3cfc0f3a MN |
1921 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1922 | if (ret) { | |
1923 | ERROR("mac address '%s' conversion failed : %s", | |
1924 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1925 | return -1; |
1926 | } | |
1927 | ||
1928 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1929 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1930 | ||
1931 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1932 | if (fd < 0) { | |
3ab87b66 | 1933 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1934 | return -1; |
1935 | } | |
1936 | ||
1937 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1938 | close(fd); | |
1939 | if (ret) | |
3ab87b66 | 1940 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1941 | |
cd54d859 DL |
1942 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1943 | ||
0ad19a3f | 1944 | return ret; |
1945 | } | |
1946 | ||
82d5ae15 | 1947 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1948 | { |
82d5ae15 DL |
1949 | struct lxc_list *iterator; |
1950 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1951 | int err; |
0ad19a3f | 1952 | |
82d5ae15 DL |
1953 | lxc_list_for_each(iterator, ip) { |
1954 | ||
1955 | inetdev = iterator->elem; | |
1956 | ||
0093bb8c DL |
1957 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1958 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1959 | if (err) { |
1960 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1961 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1962 | return -1; |
1963 | } | |
1964 | } | |
1965 | ||
1966 | return 0; | |
0ad19a3f | 1967 | } |
1968 | ||
82d5ae15 | 1969 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1970 | { |
82d5ae15 | 1971 | struct lxc_list *iterator; |
7fa9074f | 1972 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1973 | int err; |
0ad19a3f | 1974 | |
82d5ae15 DL |
1975 | lxc_list_for_each(iterator, ip) { |
1976 | ||
1977 | inet6dev = iterator->elem; | |
1978 | ||
b3df193c | 1979 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1980 | &inet6dev->mcast, &inet6dev->acast, |
1981 | inet6dev->prefix); | |
3cfc0f3a MN |
1982 | if (err) { |
1983 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1984 | ifindex, strerror(-err)); | |
82d5ae15 | 1985 | return -1; |
3cfc0f3a | 1986 | } |
82d5ae15 DL |
1987 | } |
1988 | ||
1989 | return 0; | |
0ad19a3f | 1990 | } |
1991 | ||
82d5ae15 | 1992 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1993 | { |
0ad19a3f | 1994 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1995 | char *current_ifname = ifname; |
3cfc0f3a | 1996 | int err; |
0ad19a3f | 1997 | |
82d5ae15 DL |
1998 | /* empty network namespace */ |
1999 | if (!netdev->ifindex) { | |
b0efbac4 | 2000 | if (netdev->flags & IFF_UP) { |
d472214b | 2001 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
2002 | if (err) { |
2003 | ERROR("failed to set the loopback up : %s", | |
2004 | strerror(-err)); | |
82d5ae15 DL |
2005 | return -1; |
2006 | } | |
82d5ae15 | 2007 | } |
7b57e8b6 | 2008 | return 0; |
0ad19a3f | 2009 | } |
13954cce | 2010 | |
82d5ae15 DL |
2011 | /* retrieve the name of the interface */ |
2012 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 2013 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 2014 | netdev->ifindex); |
0ad19a3f | 2015 | return -1; |
2016 | } | |
13954cce | 2017 | |
018ef520 | 2018 | /* default: let the system to choose one interface name */ |
9d083402 | 2019 | if (!netdev->name) |
fb6d9b2f DL |
2020 | netdev->name = netdev->type == LXC_NET_PHYS ? |
2021 | netdev->link : "eth%d"; | |
018ef520 | 2022 | |
82d5ae15 | 2023 | /* rename the interface name */ |
b84f58b9 | 2024 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
2025 | if (err) { |
2026 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
2027 | strerror(-err)); | |
018ef520 DL |
2028 | return -1; |
2029 | } | |
2030 | ||
2031 | /* Re-read the name of the interface because its name has changed | |
2032 | * and would be automatically allocated by the system | |
2033 | */ | |
82d5ae15 | 2034 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 2035 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 2036 | netdev->ifindex); |
018ef520 | 2037 | return -1; |
0ad19a3f | 2038 | } |
2039 | ||
82d5ae15 DL |
2040 | /* set a mac address */ |
2041 | if (netdev->hwaddr) { | |
2042 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 2043 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 2044 | current_ifname); |
0ad19a3f | 2045 | return -1; |
2046 | } | |
2047 | } | |
2048 | ||
82d5ae15 DL |
2049 | /* setup ipv4 addresses on the interface */ |
2050 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 2051 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 2052 | ifname); |
2053 | return -1; | |
2054 | } | |
2055 | ||
82d5ae15 DL |
2056 | /* setup ipv6 addresses on the interface */ |
2057 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 2058 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 2059 | ifname); |
2060 | return -1; | |
2061 | } | |
2062 | ||
82d5ae15 | 2063 | /* set the network device up */ |
b0efbac4 | 2064 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
2065 | int err; |
2066 | ||
d472214b | 2067 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
2068 | if (err) { |
2069 | ERROR("failed to set '%s' up : %s", current_ifname, | |
2070 | strerror(-err)); | |
0ad19a3f | 2071 | return -1; |
2072 | } | |
2073 | ||
2074 | /* the network is up, make the loopback up too */ | |
d472214b | 2075 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
2076 | if (err) { |
2077 | ERROR("failed to set the loopback up : %s", | |
2078 | strerror(-err)); | |
0ad19a3f | 2079 | return -1; |
2080 | } | |
2081 | } | |
2082 | ||
f8fee0e2 MK |
2083 | /* We can only set up the default routes after bringing |
2084 | * up the interface, sine bringing up the interface adds | |
2085 | * the link-local routes and we can't add a default | |
2086 | * route if the gateway is not reachable. */ | |
2087 | ||
2088 | /* setup ipv4 gateway on the interface */ | |
2089 | if (netdev->ipv4_gateway) { | |
2090 | if (!(netdev->flags & IFF_UP)) { | |
2091 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
2092 | return -1; | |
2093 | } | |
2094 | ||
2095 | if (lxc_list_empty(&netdev->ipv4)) { | |
2096 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
2097 | return -1; | |
2098 | } | |
2099 | ||
2100 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
2101 | if (err) { | |
2102 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
2103 | ifname, strerror(-err)); | |
19a26f82 MK |
2104 | if (netdev->ipv4_gateway_auto) { |
2105 | char buf[INET_ADDRSTRLEN]; | |
2106 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
2107 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
2108 | } | |
f8fee0e2 MK |
2109 | return -1; |
2110 | } | |
2111 | } | |
2112 | ||
2113 | /* setup ipv6 gateway on the interface */ | |
2114 | if (netdev->ipv6_gateway) { | |
2115 | if (!(netdev->flags & IFF_UP)) { | |
2116 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
2117 | return -1; | |
2118 | } | |
2119 | ||
2120 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
2121 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
2122 | return -1; | |
2123 | } | |
2124 | ||
2125 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
2126 | if (err) { | |
2127 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
2128 | ifname, strerror(-err)); | |
19a26f82 MK |
2129 | if (netdev->ipv6_gateway_auto) { |
2130 | char buf[INET6_ADDRSTRLEN]; | |
72d0e1cb | 2131 | inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); |
19a26f82 MK |
2132 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); |
2133 | } | |
f8fee0e2 MK |
2134 | return -1; |
2135 | } | |
2136 | } | |
2137 | ||
cd54d859 DL |
2138 | DEBUG("'%s' has been setup", current_ifname); |
2139 | ||
0ad19a3f | 2140 | return 0; |
2141 | } | |
2142 | ||
5f4535a3 | 2143 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 2144 | { |
82d5ae15 | 2145 | struct lxc_list *iterator; |
82d5ae15 | 2146 | struct lxc_netdev *netdev; |
0ad19a3f | 2147 | |
5f4535a3 | 2148 | lxc_list_for_each(iterator, network) { |
cd54d859 | 2149 | |
5f4535a3 | 2150 | netdev = iterator->elem; |
82d5ae15 DL |
2151 | |
2152 | if (setup_netdev(netdev)) { | |
2153 | ERROR("failed to setup netdev"); | |
2154 | return -1; | |
2155 | } | |
2156 | } | |
cd54d859 | 2157 | |
5f4535a3 DL |
2158 | if (!lxc_list_empty(network)) |
2159 | INFO("network has been setup"); | |
cd54d859 DL |
2160 | |
2161 | return 0; | |
0ad19a3f | 2162 | } |
2163 | ||
7b35f3d6 SH |
2164 | void lxc_rename_phys_nics_on_shutdown(struct lxc_conf *conf) |
2165 | { | |
2166 | int i; | |
2167 | ||
2168 | INFO("running to reset %d nic names", conf->num_savednics); | |
2169 | for (i=0; i<conf->num_savednics; i++) { | |
2170 | struct saved_nic *s = &conf->saved_nics[i]; | |
2171 | INFO("resetting nic %d to %s\n", s->ifindex, s->orig_name); | |
2172 | lxc_netdev_rename_by_index(s->ifindex, s->orig_name); | |
2173 | free(s->orig_name); | |
2174 | } | |
2175 | conf->num_savednics = 0; | |
2176 | free(conf->saved_nics); | |
2177 | } | |
2178 | ||
49684c0b CS |
2179 | static int setup_private_host_hw_addr(char *veth1) |
2180 | { | |
2181 | struct ifreq ifr; | |
2182 | int err; | |
2183 | int sockfd; | |
2184 | ||
2185 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
2186 | if (sockfd < 0) | |
2187 | return -errno; | |
2188 | ||
2189 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
2190 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
2191 | if (err < 0) { | |
2192 | close(sockfd); | |
2193 | return -errno; | |
2194 | } | |
2195 | ||
2196 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2197 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
2198 | close(sockfd); | |
2199 | if (err < 0) | |
2200 | return -errno; | |
2201 | ||
7ad84da7 DL |
2202 | DEBUG("mac address of host interface '%s' changed to private " |
2203 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
2204 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
2205 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
2206 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
2207 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
2208 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
2209 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
2210 | |
2211 | return 0; | |
2212 | } | |
2213 | ||
ae9242c8 SH |
2214 | static char *default_rootfs_mount = LXCROOTFSMOUNT; |
2215 | ||
7b379ab3 | 2216 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 2217 | { |
7b379ab3 | 2218 | struct lxc_conf *new; |
26ddeedd | 2219 | int i; |
7b379ab3 MN |
2220 | |
2221 | new = malloc(sizeof(*new)); | |
2222 | if (!new) { | |
2223 | ERROR("lxc_conf_init : %m"); | |
2224 | return NULL; | |
2225 | } | |
2226 | memset(new, 0, sizeof(*new)); | |
2227 | ||
b40a606e | 2228 | new->loglevel = LXC_LOG_PRIORITY_NOTSET; |
cccc74b5 | 2229 | new->personality = -1; |
596a818d DE |
2230 | new->console.log_path = NULL; |
2231 | new->console.log_fd = -1; | |
28a4b0e5 | 2232 | new->console.path = NULL; |
63376d7d | 2233 | new->console.peer = -1; |
b5159817 DE |
2234 | new->console.peerpty.busy = -1; |
2235 | new->console.peerpty.master = -1; | |
2236 | new->console.peerpty.slave = -1; | |
63376d7d DL |
2237 | new->console.master = -1; |
2238 | new->console.slave = -1; | |
2239 | new->console.name[0] = '\0'; | |
d2e30e99 | 2240 | new->maincmd_fd = -1; |
54c30e29 | 2241 | new->rootfs.mount = strdup(default_rootfs_mount); |
53f3f048 SH |
2242 | if (!new->rootfs.mount) { |
2243 | ERROR("lxc_conf_init : %m"); | |
2244 | free(new); | |
2245 | return NULL; | |
2246 | } | |
2f3f41d0 | 2247 | new->kmsg = 1; |
7b379ab3 MN |
2248 | lxc_list_init(&new->cgroup); |
2249 | lxc_list_init(&new->network); | |
2250 | lxc_list_init(&new->mount_list); | |
81810dd1 | 2251 | lxc_list_init(&new->caps); |
1fb86a7c | 2252 | lxc_list_init(&new->keepcaps); |
f6d3e3e4 | 2253 | lxc_list_init(&new->id_map); |
26ddeedd SH |
2254 | for (i=0; i<NUM_LXC_HOOKS; i++) |
2255 | lxc_list_init(&new->hooks[i]); | |
e075f5d9 SH |
2256 | #if HAVE_APPARMOR |
2257 | new->aa_profile = NULL; | |
2258 | #endif | |
2259 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ | |
2260 | new->lsm_umount_proc = 0; | |
2261 | #endif | |
7b379ab3 MN |
2262 | |
2263 | return new; | |
089cd8b8 DL |
2264 | } |
2265 | ||
e3b4c4c4 | 2266 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2267 | { |
8634bc19 | 2268 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 2269 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 2270 | int err; |
13954cce | 2271 | |
e892973e DL |
2272 | if (netdev->priv.veth_attr.pair) |
2273 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 | 2274 | else { |
9ba8130c SH |
2275 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); |
2276 | if (err >= sizeof(veth1buf)) { /* can't *really* happen, but... */ | |
2277 | ERROR("veth1 name too long"); | |
2278 | return -1; | |
2279 | } | |
4a0ba80d | 2280 | veth1 = mkifname(veth1buf); |
74a2b586 JK |
2281 | /* store away for deconf */ |
2282 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
8634bc19 | 2283 | } |
82d5ae15 | 2284 | |
0e391e57 | 2285 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
4a0ba80d | 2286 | veth2 = mkifname(veth2buf); |
82d5ae15 DL |
2287 | |
2288 | if (!strlen(veth1) || !strlen(veth2)) { | |
2289 | ERROR("failed to allocate a temporary name"); | |
2290 | return -1; | |
0ad19a3f | 2291 | } |
2292 | ||
3cfc0f3a MN |
2293 | err = lxc_veth_create(veth1, veth2); |
2294 | if (err) { | |
2295 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
2296 | strerror(-err)); | |
6ab9ab6d | 2297 | return -1; |
0ad19a3f | 2298 | } |
13954cce | 2299 | |
49684c0b CS |
2300 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
2301 | * will always keep the host's mac address and not take the mac address | |
2302 | * of a container */ | |
2303 | err = setup_private_host_hw_addr(veth1); | |
2304 | if (err) { | |
2305 | ERROR("failed to change mac address of host interface '%s' : %s", | |
2306 | veth1, strerror(-err)); | |
2307 | goto out_delete; | |
2308 | } | |
2309 | ||
82d5ae15 | 2310 | if (netdev->mtu) { |
d472214b | 2311 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 2312 | if (!err) |
d472214b | 2313 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
2314 | if (err) { |
2315 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
2316 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 2317 | goto out_delete; |
75d09f83 DL |
2318 | } |
2319 | } | |
2320 | ||
3cfc0f3a MN |
2321 | if (netdev->link) { |
2322 | err = lxc_bridge_attach(netdev->link, veth1); | |
2323 | if (err) { | |
2324 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
2325 | veth1, netdev->link, strerror(-err)); | |
2326 | goto out_delete; | |
2327 | } | |
eb14c10a DL |
2328 | } |
2329 | ||
82d5ae15 DL |
2330 | netdev->ifindex = if_nametoindex(veth2); |
2331 | if (!netdev->ifindex) { | |
36eb9bde | 2332 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
2333 | goto out_delete; |
2334 | } | |
2335 | ||
d472214b | 2336 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
2337 | if (err) { |
2338 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
2339 | goto out_delete; | |
0ad19a3f | 2340 | } |
2341 | ||
e3b4c4c4 | 2342 | if (netdev->upscript) { |
751d9dcd DL |
2343 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2344 | "veth", veth1, (char*) NULL); | |
2345 | if (err) | |
e3b4c4c4 | 2346 | goto out_delete; |
e3b4c4c4 ST |
2347 | } |
2348 | ||
82d5ae15 DL |
2349 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
2350 | veth1, veth2, netdev->ifindex); | |
2351 | ||
6ab9ab6d | 2352 | return 0; |
eb14c10a DL |
2353 | |
2354 | out_delete: | |
b84f58b9 | 2355 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 2356 | return -1; |
13954cce | 2357 | } |
d957ae2d | 2358 | |
74a2b586 JK |
2359 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2360 | { | |
2361 | char *veth1; | |
2362 | int err; | |
2363 | ||
2364 | if (netdev->priv.veth_attr.pair) | |
2365 | veth1 = netdev->priv.veth_attr.pair; | |
2366 | else | |
2367 | veth1 = netdev->priv.veth_attr.veth1; | |
2368 | ||
2369 | if (netdev->downscript) { | |
2370 | err = run_script(handler->name, "net", netdev->downscript, | |
2371 | "down", "veth", veth1, (char*) NULL); | |
2372 | if (err) | |
2373 | return -1; | |
2374 | } | |
2375 | return 0; | |
2376 | } | |
2377 | ||
e3b4c4c4 | 2378 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2379 | { |
0e391e57 | 2380 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 2381 | int err; |
d957ae2d MT |
2382 | |
2383 | if (!netdev->link) { | |
2384 | ERROR("no link specified for macvlan netdev"); | |
2385 | return -1; | |
2386 | } | |
13954cce | 2387 | |
9ba8130c SH |
2388 | err = snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
2389 | if (err >= sizeof(peerbuf)) | |
2390 | return -1; | |
82d5ae15 | 2391 | |
4a0ba80d | 2392 | peer = mkifname(peerbuf); |
82d5ae15 DL |
2393 | if (!strlen(peer)) { |
2394 | ERROR("failed to make a temporary name"); | |
2395 | return -1; | |
0ad19a3f | 2396 | } |
2397 | ||
3cfc0f3a MN |
2398 | err = lxc_macvlan_create(netdev->link, peer, |
2399 | netdev->priv.macvlan_attr.mode); | |
2400 | if (err) { | |
2401 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
2402 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 2403 | return -1; |
0ad19a3f | 2404 | } |
2405 | ||
82d5ae15 DL |
2406 | netdev->ifindex = if_nametoindex(peer); |
2407 | if (!netdev->ifindex) { | |
36eb9bde | 2408 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 2409 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 2410 | return -1; |
22ebac19 | 2411 | } |
2412 | ||
e3b4c4c4 | 2413 | if (netdev->upscript) { |
751d9dcd DL |
2414 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2415 | "macvlan", netdev->link, (char*) NULL); | |
2416 | if (err) | |
e3b4c4c4 | 2417 | return -1; |
e3b4c4c4 ST |
2418 | } |
2419 | ||
e892973e DL |
2420 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
2421 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 2422 | |
d957ae2d | 2423 | return 0; |
0ad19a3f | 2424 | } |
2425 | ||
74a2b586 JK |
2426 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2427 | { | |
2428 | int err; | |
2429 | ||
2430 | if (netdev->downscript) { | |
2431 | err = run_script(handler->name, "net", netdev->downscript, | |
2432 | "down", "macvlan", netdev->link, | |
2433 | (char*) NULL); | |
2434 | if (err) | |
2435 | return -1; | |
2436 | } | |
2437 | return 0; | |
2438 | } | |
2439 | ||
26c39028 | 2440 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 2441 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
2442 | { |
2443 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 2444 | int err; |
26c39028 JHS |
2445 | |
2446 | if (!netdev->link) { | |
2447 | ERROR("no link specified for vlan netdev"); | |
2448 | return -1; | |
2449 | } | |
2450 | ||
9ba8130c SH |
2451 | err = snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
2452 | if (err >= sizeof(peer)) { | |
2453 | ERROR("peer name too long"); | |
2454 | return -1; | |
2455 | } | |
26c39028 | 2456 | |
3cfc0f3a MN |
2457 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
2458 | if (err) { | |
2459 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
2460 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
2461 | return -1; |
2462 | } | |
2463 | ||
2464 | netdev->ifindex = if_nametoindex(peer); | |
2465 | if (!netdev->ifindex) { | |
2466 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 2467 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
2468 | return -1; |
2469 | } | |
2470 | ||
e892973e DL |
2471 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
2472 | netdev->ifindex); | |
2473 | ||
26c39028 JHS |
2474 | return 0; |
2475 | } | |
2476 | ||
74a2b586 JK |
2477 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2478 | { | |
2479 | return 0; | |
2480 | } | |
2481 | ||
e3b4c4c4 | 2482 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2483 | { |
6168e99f DL |
2484 | if (!netdev->link) { |
2485 | ERROR("no link specified for the physical interface"); | |
2486 | return -1; | |
2487 | } | |
2488 | ||
9d083402 | 2489 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 2490 | if (!netdev->ifindex) { |
9d083402 | 2491 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 2492 | return -1; |
2493 | } | |
2494 | ||
e3b4c4c4 ST |
2495 | if (netdev->upscript) { |
2496 | int err; | |
751d9dcd DL |
2497 | err = run_script(handler->name, "net", netdev->upscript, |
2498 | "up", "phys", netdev->link, (char*) NULL); | |
2499 | if (err) | |
e3b4c4c4 | 2500 | return -1; |
e3b4c4c4 ST |
2501 | } |
2502 | ||
82d5ae15 | 2503 | return 0; |
0ad19a3f | 2504 | } |
2505 | ||
74a2b586 JK |
2506 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2507 | { | |
2508 | int err; | |
2509 | ||
2510 | if (netdev->downscript) { | |
2511 | err = run_script(handler->name, "net", netdev->downscript, | |
2512 | "down", "phys", netdev->link, (char*) NULL); | |
2513 | if (err) | |
2514 | return -1; | |
2515 | } | |
2516 | return 0; | |
2517 | } | |
2518 | ||
e3b4c4c4 | 2519 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2520 | { |
82d5ae15 | 2521 | netdev->ifindex = 0; |
e3b4c4c4 ST |
2522 | if (netdev->upscript) { |
2523 | int err; | |
751d9dcd DL |
2524 | err = run_script(handler->name, "net", netdev->upscript, |
2525 | "up", "empty", (char*) NULL); | |
2526 | if (err) | |
e3b4c4c4 | 2527 | return -1; |
e3b4c4c4 | 2528 | } |
82d5ae15 | 2529 | return 0; |
0ad19a3f | 2530 | } |
2531 | ||
74a2b586 JK |
2532 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2533 | { | |
2534 | int err; | |
2535 | ||
2536 | if (netdev->downscript) { | |
2537 | err = run_script(handler->name, "net", netdev->downscript, | |
2538 | "down", "empty", (char*) NULL); | |
2539 | if (err) | |
2540 | return -1; | |
2541 | } | |
2542 | return 0; | |
2543 | } | |
2544 | ||
e3b4c4c4 | 2545 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 2546 | { |
e3b4c4c4 | 2547 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 2548 | struct lxc_list *iterator; |
82d5ae15 | 2549 | struct lxc_netdev *netdev; |
0ad19a3f | 2550 | |
5f4535a3 | 2551 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 2552 | |
5f4535a3 | 2553 | netdev = iterator->elem; |
13954cce | 2554 | |
24654103 | 2555 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 2556 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 2557 | netdev->type); |
82d5ae15 DL |
2558 | return -1; |
2559 | } | |
0ad19a3f | 2560 | |
e3b4c4c4 | 2561 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
2562 | ERROR("failed to create netdev"); |
2563 | return -1; | |
2564 | } | |
e3b4c4c4 | 2565 | |
0ad19a3f | 2566 | } |
2567 | ||
2568 | return 0; | |
2569 | } | |
2570 | ||
74a2b586 | 2571 | void lxc_delete_network(struct lxc_handler *handler) |
7fef7a06 | 2572 | { |
74a2b586 | 2573 | struct lxc_list *network = &handler->conf->network; |
7fef7a06 DL |
2574 | struct lxc_list *iterator; |
2575 | struct lxc_netdev *netdev; | |
2576 | ||
2577 | lxc_list_for_each(iterator, network) { | |
2578 | netdev = iterator->elem; | |
d472214b | 2579 | |
74a2b586 | 2580 | if (netdev->ifindex != 0 && netdev->type == LXC_NET_PHYS) { |
d8f8e352 DL |
2581 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) |
2582 | WARN("failed to rename to the initial name the " \ | |
2583 | "netdev '%s'", netdev->link); | |
d472214b | 2584 | continue; |
d8f8e352 | 2585 | } |
d472214b | 2586 | |
74a2b586 JK |
2587 | if (netdev_deconf[netdev->type](handler, netdev)) { |
2588 | WARN("failed to destroy netdev"); | |
2589 | } | |
2590 | ||
d8f8e352 DL |
2591 | /* Recent kernel remove the virtual interfaces when the network |
2592 | * namespace is destroyed but in case we did not moved the | |
2593 | * interface to the network namespace, we have to destroy it | |
2594 | */ | |
74a2b586 JK |
2595 | if (netdev->ifindex != 0 && |
2596 | lxc_netdev_delete_by_index(netdev->ifindex)) | |
d8f8e352 | 2597 | WARN("failed to remove interface '%s'", netdev->name); |
7fef7a06 DL |
2598 | } |
2599 | } | |
2600 | ||
5f4535a3 | 2601 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 2602 | { |
82d5ae15 | 2603 | struct lxc_list *iterator; |
82d5ae15 | 2604 | struct lxc_netdev *netdev; |
3cfc0f3a | 2605 | int err; |
0ad19a3f | 2606 | |
5f4535a3 | 2607 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 2608 | |
5f4535a3 | 2609 | netdev = iterator->elem; |
82d5ae15 | 2610 | |
236087a6 DL |
2611 | /* empty network namespace, nothing to move */ |
2612 | if (!netdev->ifindex) | |
2613 | continue; | |
2614 | ||
d472214b | 2615 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
2616 | if (err) { |
2617 | ERROR("failed to move '%s' to the container : %s", | |
2618 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
2619 | return -1; |
2620 | } | |
2621 | ||
c1c75c04 | 2622 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 2623 | } |
2624 | ||
2625 | return 0; | |
2626 | } | |
2627 | ||
251d0d2a DE |
2628 | static int write_id_mapping(enum idtype idtype, pid_t pid, const char *buf, |
2629 | size_t buf_size) | |
f6d3e3e4 SH |
2630 | { |
2631 | char path[PATH_MAX]; | |
e4ccd113 | 2632 | int ret, closeret; |
f6d3e3e4 SH |
2633 | FILE *f; |
2634 | ||
2635 | ret = snprintf(path, PATH_MAX, "/proc/%d/%cid_map", pid, idtype == ID_TYPE_UID ? 'u' : 'g'); | |
2636 | if (ret < 0 || ret >= PATH_MAX) { | |
2637 | fprintf(stderr, "%s: path name too long", __func__); | |
2638 | return -E2BIG; | |
2639 | } | |
2640 | f = fopen(path, "w"); | |
2641 | if (!f) { | |
2642 | perror("open"); | |
2643 | return -EINVAL; | |
2644 | } | |
251d0d2a | 2645 | ret = fwrite(buf, buf_size, 1, f); |
f6d3e3e4 | 2646 | if (ret < 0) |
e4ccd113 SH |
2647 | SYSERROR("writing id mapping"); |
2648 | closeret = fclose(f); | |
2649 | if (closeret) | |
2650 | SYSERROR("writing id mapping"); | |
2651 | return ret < 0 ? ret : closeret; | |
f6d3e3e4 SH |
2652 | } |
2653 | ||
2654 | int lxc_map_ids(struct lxc_list *idmap, pid_t pid) | |
2655 | { | |
2656 | struct lxc_list *iterator; | |
2657 | struct id_map *map; | |
2658 | int ret = 0; | |
251d0d2a | 2659 | enum idtype type; |
4f7521b4 | 2660 | char *buf = NULL, *pos; |
251d0d2a DE |
2661 | |
2662 | for(type = ID_TYPE_UID; type <= ID_TYPE_GID; type++) { | |
4f7521b4 SH |
2663 | int left, fill; |
2664 | ||
2665 | pos = buf; | |
251d0d2a | 2666 | lxc_list_for_each(iterator, idmap) { |
4f7521b4 SH |
2667 | /* The kernel only takes <= 4k for writes to /proc/<nr>/[ug]id_map */ |
2668 | if (!buf) | |
2669 | buf = pos = malloc(4096); | |
2670 | if (!buf) | |
2671 | return -ENOMEM; | |
2672 | ||
251d0d2a DE |
2673 | map = iterator->elem; |
2674 | if (map->idtype == type) { | |
2675 | left = 4096 - (pos - buf); | |
2676 | fill = snprintf(pos, left, "%lu %lu %lu\n", | |
2677 | map->nsid, map->hostid, map->range); | |
2678 | if (fill <= 0 || fill >= left) | |
2679 | SYSERROR("snprintf failed, too many mappings"); | |
2680 | pos += fill; | |
2681 | } | |
2682 | } | |
4f7521b4 SH |
2683 | if (pos == buf) // no mappings were found |
2684 | continue; | |
251d0d2a | 2685 | ret = write_id_mapping(type, pid, buf, pos-buf); |
f6d3e3e4 SH |
2686 | if (ret) |
2687 | break; | |
2688 | } | |
251d0d2a | 2689 | |
4f7521b4 SH |
2690 | if (buf) |
2691 | free(buf); | |
f6d3e3e4 SH |
2692 | return ret; |
2693 | } | |
2694 | ||
19a26f82 MK |
2695 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
2696 | { | |
2697 | struct lxc_list *network = &handler->conf->network; | |
2698 | struct lxc_list *iterator; | |
2699 | struct lxc_netdev *netdev; | |
2700 | int link_index; | |
2701 | ||
2702 | lxc_list_for_each(iterator, network) { | |
2703 | netdev = iterator->elem; | |
2704 | ||
2705 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2706 | continue; | |
2707 | ||
2708 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
2709 | ERROR("gateway = auto only supported for " | |
2710 | "veth and macvlan"); | |
2711 | return -1; | |
2712 | } | |
2713 | ||
2714 | if (!netdev->link) { | |
2715 | ERROR("gateway = auto needs a link interface"); | |
2716 | return -1; | |
2717 | } | |
2718 | ||
2719 | link_index = if_nametoindex(netdev->link); | |
2720 | if (!link_index) | |
2721 | return -EINVAL; | |
2722 | ||
2723 | if (netdev->ipv4_gateway_auto) { | |
2724 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
2725 | ERROR("failed to automatically find ipv4 gateway " | |
2726 | "address from link interface '%s'", netdev->link); | |
2727 | return -1; | |
2728 | } | |
2729 | } | |
2730 | ||
2731 | if (netdev->ipv6_gateway_auto) { | |
2732 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
2733 | ERROR("failed to automatically find ipv6 gateway " | |
2734 | "address from link interface '%s'", netdev->link); | |
2735 | return -1; | |
2736 | } | |
2737 | } | |
2738 | } | |
2739 | ||
2740 | return 0; | |
2741 | } | |
2742 | ||
5e4a62bf | 2743 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 2744 | { |
5e4a62bf | 2745 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 2746 | int i; |
b0a33c1e | 2747 | |
5e4a62bf DL |
2748 | /* no tty in the configuration */ |
2749 | if (!conf->tty) | |
b0a33c1e | 2750 | return 0; |
2751 | ||
13954cce | 2752 | tty_info->pty_info = |
e4e7d59d | 2753 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 2754 | if (!tty_info->pty_info) { |
36eb9bde | 2755 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 2756 | return -1; |
b0a33c1e | 2757 | } |
2758 | ||
985d15b1 | 2759 | for (i = 0; i < conf->tty; i++) { |
13954cce | 2760 | |
b0a33c1e | 2761 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
2762 | ||
13954cce | 2763 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 2764 | pty_info->name, NULL, NULL)) { |
36eb9bde | 2765 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
2766 | tty_info->nbtty = i; |
2767 | lxc_delete_tty(tty_info); | |
2768 | return -1; | |
b0a33c1e | 2769 | } |
2770 | ||
5332bb84 DL |
2771 | DEBUG("allocated pty '%s' (%d/%d)", |
2772 | pty_info->name, pty_info->master, pty_info->slave); | |
2773 | ||
b035ad62 MS |
2774 | /* Prevent leaking the file descriptors to the container */ |
2775 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
2776 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
2777 | ||
b0a33c1e | 2778 | pty_info->busy = 0; |
2779 | } | |
2780 | ||
985d15b1 | 2781 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
2782 | |
2783 | INFO("tty's configured"); | |
2784 | ||
985d15b1 | 2785 | return 0; |
b0a33c1e | 2786 | } |
2787 | ||
2788 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
2789 | { | |
2790 | int i; | |
2791 | ||
2792 | for (i = 0; i < tty_info->nbtty; i++) { | |
2793 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
2794 | ||
2795 | close(pty_info->master); | |
2796 | close(pty_info->slave); | |
2797 | } | |
2798 | ||
2799 | free(tty_info->pty_info); | |
2800 | tty_info->nbtty = 0; | |
2801 | } | |
2802 | ||
f6d3e3e4 SH |
2803 | /* |
2804 | * given a host uid, return the ns uid if it is mapped. | |
2805 | * if it is not mapped, return the original host id. | |
2806 | */ | |
2807 | static int shiftid(struct lxc_conf *c, int uid, enum idtype w) | |
2808 | { | |
2809 | struct lxc_list *iterator; | |
2810 | struct id_map *map; | |
2811 | int low, high; | |
2812 | ||
2813 | lxc_list_for_each(iterator, &c->id_map) { | |
2814 | map = iterator->elem; | |
2815 | if (map->idtype != w) | |
2816 | continue; | |
2817 | ||
2818 | low = map->nsid; | |
2819 | high = map->nsid + map->range; | |
2820 | if (uid < low || uid >= high) | |
2821 | continue; | |
2822 | ||
2823 | return uid - low + map->hostid; | |
2824 | } | |
2825 | ||
2826 | return uid; | |
2827 | } | |
2828 | ||
2829 | /* | |
2830 | * Take a pathname for a file created on the host, and map the uid and gid | |
2831 | * into the container if needed. (Used for ttys) | |
2832 | */ | |
2833 | static int uid_shift_file(char *path, struct lxc_conf *c) | |
2834 | { | |
2835 | struct stat statbuf; | |
2836 | int newuid, newgid; | |
2837 | ||
2838 | if (stat(path, &statbuf)) { | |
2839 | SYSERROR("stat(%s)", path); | |
2840 | return -1; | |
2841 | } | |
2842 | ||
2843 | newuid = shiftid(c, statbuf.st_uid, ID_TYPE_UID); | |
2844 | newgid = shiftid(c, statbuf.st_gid, ID_TYPE_GID); | |
2845 | if (newuid != statbuf.st_uid || newgid != statbuf.st_gid) { | |
20087962 | 2846 | DEBUG("chowning %s from %d:%d to %d:%d\n", path, (int)statbuf.st_uid, (int)statbuf.st_gid, newuid, newgid); |
f6d3e3e4 SH |
2847 | if (chown(path, newuid, newgid)) { |
2848 | SYSERROR("chown(%s)", path); | |
2849 | return -1; | |
2850 | } | |
2851 | } | |
2852 | return 0; | |
2853 | } | |
2854 | ||
2855 | int uid_shift_ttys(int pid, struct lxc_conf *conf) | |
2856 | { | |
2857 | int i, ret; | |
2858 | struct lxc_tty_info *tty_info = &conf->tty_info; | |
2859 | char path[MAXPATHLEN]; | |
2860 | char *ttydir = conf->ttydir; | |
2861 | ||
2862 | if (!conf->rootfs.path) | |
2863 | return 0; | |
2864 | /* first the console */ | |
2865 | ret = snprintf(path, sizeof(path), "/proc/%d/root/dev/%s/console", pid, ttydir ? ttydir : ""); | |
2866 | if (ret < 0 || ret >= sizeof(path)) { | |
2867 | ERROR("console path too long\n"); | |
2868 | return -1; | |
2869 | } | |
2870 | if (uid_shift_file(path, conf)) { | |
2871 | DEBUG("Failed to chown the console %s.\n", path); | |
2872 | return -1; | |
2873 | } | |
2874 | for (i=0; i< tty_info->nbtty; i++) { | |
2875 | ret = snprintf(path, sizeof(path), "/proc/%d/root/dev/%s/tty%d", | |
2876 | pid, ttydir ? ttydir : "", i + 1); | |
2877 | if (ret < 0 || ret >= sizeof(path)) { | |
2878 | ERROR("pathname too long for ttys"); | |
2879 | return -1; | |
2880 | } | |
2881 | if (uid_shift_file(path, conf)) { | |
2882 | DEBUG("Failed to chown pty %s.\n", path); | |
2883 | return -1; | |
2884 | } | |
2885 | } | |
2886 | ||
2887 | return 0; | |
2888 | } | |
2889 | ||
283678ed | 2890 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf, const char *lxcpath) |
0ad19a3f | 2891 | { |
e075f5d9 SH |
2892 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
2893 | int mounted; | |
2894 | #endif | |
2895 | ||
571e6ec8 | 2896 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 2897 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 2898 | return -1; |
0ad19a3f | 2899 | } |
2900 | ||
5f4535a3 | 2901 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 2902 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 2903 | return -1; |
0ad19a3f | 2904 | } |
2905 | ||
283678ed | 2906 | if (run_lxc_hooks(name, "pre-mount", lxc_conf, lxcpath, NULL)) { |
89eaa05e SH |
2907 | ERROR("failed to run pre-mount hooks for container '%s'.", name); |
2908 | return -1; | |
2909 | } | |
5ea6163a | 2910 | |
cc28d0b0 | 2911 | if (setup_rootfs(lxc_conf)) { |
ac778708 | 2912 | ERROR("failed to setup rootfs for '%s'", name); |
95b5ffaf | 2913 | return -1; |
0ad19a3f | 2914 | } |
2915 | ||
c6883f38 | 2916 | if (lxc_conf->autodev) { |
91c3830e SH |
2917 | if (mount_autodev(lxc_conf->rootfs.mount)) { |
2918 | ERROR("failed to mount /dev in the container"); | |
c6883f38 SH |
2919 | return -1; |
2920 | } | |
2921 | } | |
2922 | ||
80a881b2 | 2923 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab, name)) { |
36eb9bde | 2924 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2925 | return -1; |
576f946d | 2926 | } |
2927 | ||
c1dc38c2 | 2928 | if (!lxc_list_empty(&lxc_conf->mount_list) && setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list, name)) { |
e7938e9e MN |
2929 | ERROR("failed to setup the mount entries for '%s'", name); |
2930 | return -1; | |
2931 | } | |
2932 | ||
283678ed | 2933 | if (run_lxc_hooks(name, "mount", lxc_conf, lxcpath, NULL)) { |
773fb9ca SH |
2934 | ERROR("failed to run mount hooks for container '%s'.", name); |
2935 | return -1; | |
2936 | } | |
2937 | ||
91c3830e | 2938 | if (lxc_conf->autodev) { |
283678ed | 2939 | if (run_lxc_hooks(name, "autodev", lxc_conf, lxcpath, NULL)) { |
f7bee6c6 MW |
2940 | ERROR("failed to run autodev hooks for container '%s'.", name); |
2941 | return -1; | |
2942 | } | |
91c3830e SH |
2943 | if (setup_autodev(lxc_conf->rootfs.mount)) { |
2944 | ERROR("failed to populate /dev in the container"); | |
2945 | return -1; | |
2946 | } | |
2947 | } | |
2948 | ||
37903589 | 2949 | if (!lxc_conf->is_execute && setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2950 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2951 | return -1; |
6e590161 | 2952 | } |
2953 | ||
7e0e1d94 AV |
2954 | if (lxc_conf->kmsg) { |
2955 | if (setup_kmsg(&lxc_conf->rootfs, &lxc_conf->console)) // don't fail | |
2956 | ERROR("failed to setup kmsg for '%s'", name); | |
2957 | } | |
1bd051a6 | 2958 | |
37903589 | 2959 | if (!lxc_conf->is_execute && setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2960 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2961 | return -1; |
b0a33c1e | 2962 | } |
2963 | ||
e075f5d9 | 2964 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
9ac3ffb5 SG |
2965 | INFO("rootfs path is .%s., mount is .%s.", lxc_conf->rootfs.path, |
2966 | lxc_conf->rootfs.mount); | |
6e46cfcb SH |
2967 | if (lxc_conf->rootfs.path == NULL || strlen(lxc_conf->rootfs.path) == 0) { |
2968 | if (mount("proc", "/proc", "proc", 0, NULL)) { | |
2969 | SYSERROR("Failed mounting /proc, proceeding"); | |
2970 | mounted = 0; | |
2971 | } else | |
2972 | mounted = 1; | |
2973 | } else | |
9ac3ffb5 | 2974 | mounted = lsm_mount_proc_if_needed(lxc_conf->rootfs.path, lxc_conf->rootfs.mount); |
e075f5d9 SH |
2975 | if (mounted == -1) { |
2976 | SYSERROR("failed to mount /proc in the container."); | |
2977 | return -1; | |
2978 | } else if (mounted == 1) { | |
2979 | lxc_conf->lsm_umount_proc = 1; | |
2980 | } | |
2981 | #endif | |
2982 | ||
ac778708 | 2983 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2984 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2985 | return -1; |
ed502555 | 2986 | } |
2987 | ||
571e6ec8 | 2988 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2989 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2990 | return -1; |
3c26f34e | 2991 | } |
2992 | ||
cccc74b5 DL |
2993 | if (setup_personality(lxc_conf->personality)) { |
2994 | ERROR("failed to setup personality"); | |
2995 | return -1; | |
2996 | } | |
2997 | ||
f6d3e3e4 | 2998 | if (lxc_list_empty(&lxc_conf->id_map)) { |
1fb86a7c SH |
2999 | if (!lxc_list_empty(&lxc_conf->keepcaps)) { |
3000 | if (!lxc_list_empty(&lxc_conf->caps)) { | |
3001 | ERROR("Simultaneously requested dropping and keeping caps"); | |
3002 | return -1; | |
3003 | } | |
3004 | if (dropcaps_except(&lxc_conf->keepcaps)) { | |
3005 | ERROR("failed to keep requested caps\n"); | |
3006 | return -1; | |
3007 | } | |
3008 | } else if (setup_caps(&lxc_conf->caps)) { | |
f6d3e3e4 SH |
3009 | ERROR("failed to drop capabilities"); |
3010 | return -1; | |
3011 | } | |
81810dd1 DL |
3012 | } |
3013 | ||
cd54d859 DL |
3014 | NOTICE("'%s' is setup.", name); |
3015 | ||
0ad19a3f | 3016 | return 0; |
3017 | } | |
26ddeedd | 3018 | |
283678ed SH |
3019 | int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf, |
3020 | const char *lxcpath, char *argv[]) | |
26ddeedd SH |
3021 | { |
3022 | int which = -1; | |
3023 | struct lxc_list *it; | |
3024 | ||
3025 | if (strcmp(hook, "pre-start") == 0) | |
3026 | which = LXCHOOK_PRESTART; | |
5ea6163a SH |
3027 | else if (strcmp(hook, "pre-mount") == 0) |
3028 | which = LXCHOOK_PREMOUNT; | |
26ddeedd SH |
3029 | else if (strcmp(hook, "mount") == 0) |
3030 | which = LXCHOOK_MOUNT; | |
f7bee6c6 MW |
3031 | else if (strcmp(hook, "autodev") == 0) |
3032 | which = LXCHOOK_AUTODEV; | |
26ddeedd SH |
3033 | else if (strcmp(hook, "start") == 0) |
3034 | which = LXCHOOK_START; | |
3035 | else if (strcmp(hook, "post-stop") == 0) | |
3036 | which = LXCHOOK_POSTSTOP; | |
148e91f5 SH |
3037 | else if (strcmp(hook, "clone") == 0) |
3038 | which = LXCHOOK_CLONE; | |
26ddeedd SH |
3039 | else |
3040 | return -1; | |
3041 | lxc_list_for_each(it, &conf->hooks[which]) { | |
3042 | int ret; | |
3043 | char *hookname = it->elem; | |
283678ed | 3044 | ret = run_script_argv(name, "lxc", hookname, hook, lxcpath, argv); |
26ddeedd SH |
3045 | if (ret) |
3046 | return ret; | |
3047 | } | |
3048 | return 0; | |
3049 | } | |
72d0e1cb | 3050 | |
427b3a21 | 3051 | static void lxc_remove_nic(struct lxc_list *it) |
72d0e1cb SG |
3052 | { |
3053 | struct lxc_netdev *netdev = it->elem; | |
9ebb03ad | 3054 | struct lxc_list *it2,*next; |
72d0e1cb SG |
3055 | |
3056 | lxc_list_del(it); | |
3057 | ||
3058 | if (netdev->link) | |
3059 | free(netdev->link); | |
3060 | if (netdev->name) | |
3061 | free(netdev->name); | |
3062 | if (netdev->upscript) | |
3063 | free(netdev->upscript); | |
3064 | if (netdev->hwaddr) | |
3065 | free(netdev->hwaddr); | |
3066 | if (netdev->mtu) | |
3067 | free(netdev->mtu); | |
3068 | if (netdev->ipv4_gateway) | |
3069 | free(netdev->ipv4_gateway); | |
3070 | if (netdev->ipv6_gateway) | |
3071 | free(netdev->ipv6_gateway); | |
9ebb03ad | 3072 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { |
72d0e1cb SG |
3073 | lxc_list_del(it2); |
3074 | free(it2->elem); | |
3075 | free(it2); | |
3076 | } | |
9ebb03ad | 3077 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { |
72d0e1cb SG |
3078 | lxc_list_del(it2); |
3079 | free(it2->elem); | |
3080 | free(it2); | |
3081 | } | |
d95db067 | 3082 | free(netdev); |
72d0e1cb SG |
3083 | free(it); |
3084 | } | |
3085 | ||
3086 | /* we get passed in something like '0', '0.ipv4' or '1.ipv6' */ | |
12a50cc6 | 3087 | int lxc_clear_nic(struct lxc_conf *c, const char *key) |
72d0e1cb SG |
3088 | { |
3089 | char *p1; | |
3090 | int ret, idx, i; | |
3091 | struct lxc_list *it; | |
3092 | struct lxc_netdev *netdev; | |
3093 | ||
3094 | p1 = index(key, '.'); | |
3095 | if (!p1 || *(p1+1) == '\0') | |
3096 | p1 = NULL; | |
3097 | ||
3098 | ret = sscanf(key, "%d", &idx); | |
3099 | if (ret != 1) return -1; | |
3100 | if (idx < 0) | |
3101 | return -1; | |
3102 | ||
3103 | i = 0; | |
3104 | lxc_list_for_each(it, &c->network) { | |
3105 | if (i == idx) | |
3106 | break; | |
3107 | i++; | |
3108 | } | |
3109 | if (i < idx) // we don't have that many nics defined | |
3110 | return -1; | |
3111 | ||
3112 | if (!it || !it->elem) | |
3113 | return -1; | |
3114 | ||
3115 | netdev = it->elem; | |
3116 | ||
3117 | if (!p1) { | |
3118 | lxc_remove_nic(it); | |
3119 | } else if (strcmp(p1, "ipv4") == 0) { | |
9ebb03ad DE |
3120 | struct lxc_list *it2,*next; |
3121 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { | |
72d0e1cb SG |
3122 | lxc_list_del(it2); |
3123 | free(it2->elem); | |
3124 | free(it2); | |
3125 | } | |
3126 | } else if (strcmp(p1, "ipv6") == 0) { | |
9ebb03ad DE |
3127 | struct lxc_list *it2,*next; |
3128 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { | |
72d0e1cb SG |
3129 | lxc_list_del(it2); |
3130 | free(it2->elem); | |
3131 | free(it2); | |
3132 | } | |
3133 | } else if (strcmp(p1, "link") == 0) { | |
3134 | if (netdev->link) { | |
3135 | free(netdev->link); | |
3136 | netdev->link = NULL; | |
3137 | } | |
3138 | } else if (strcmp(p1, "name") == 0) { | |
3139 | if (netdev->name) { | |
3140 | free(netdev->name); | |
3141 | netdev->name = NULL; | |
3142 | } | |
3143 | } else if (strcmp(p1, "script.up") == 0) { | |
3144 | if (netdev->upscript) { | |
3145 | free(netdev->upscript); | |
3146 | netdev->upscript = NULL; | |
3147 | } | |
3148 | } else if (strcmp(p1, "hwaddr") == 0) { | |
3149 | if (netdev->hwaddr) { | |
3150 | free(netdev->hwaddr); | |
3151 | netdev->hwaddr = NULL; | |
3152 | } | |
3153 | } else if (strcmp(p1, "mtu") == 0) { | |
3154 | if (netdev->mtu) { | |
3155 | free(netdev->mtu); | |
3156 | netdev->mtu = NULL; | |
3157 | } | |
3158 | } else if (strcmp(p1, "ipv4_gateway") == 0) { | |
3159 | if (netdev->ipv4_gateway) { | |
3160 | free(netdev->ipv4_gateway); | |
3161 | netdev->ipv4_gateway = NULL; | |
3162 | } | |
3163 | } else if (strcmp(p1, "ipv6_gateway") == 0) { | |
3164 | if (netdev->ipv6_gateway) { | |
3165 | free(netdev->ipv6_gateway); | |
3166 | netdev->ipv6_gateway = NULL; | |
3167 | } | |
3168 | } | |
3169 | else return -1; | |
3170 | ||
3171 | return 0; | |
3172 | } | |
3173 | ||
3174 | int lxc_clear_config_network(struct lxc_conf *c) | |
3175 | { | |
9ebb03ad DE |
3176 | struct lxc_list *it,*next; |
3177 | lxc_list_for_each_safe(it, &c->network, next) { | |
72d0e1cb SG |
3178 | lxc_remove_nic(it); |
3179 | } | |
3180 | return 0; | |
3181 | } | |
3182 | ||
3183 | int lxc_clear_config_caps(struct lxc_conf *c) | |
3184 | { | |
9ebb03ad | 3185 | struct lxc_list *it,*next; |
72d0e1cb | 3186 | |
9ebb03ad | 3187 | lxc_list_for_each_safe(it, &c->caps, next) { |
72d0e1cb SG |
3188 | lxc_list_del(it); |
3189 | free(it->elem); | |
3190 | free(it); | |
3191 | } | |
3192 | return 0; | |
3193 | } | |
3194 | ||
27c27d73 SH |
3195 | int lxc_clear_idmaps(struct lxc_conf *c) |
3196 | { | |
3197 | struct lxc_list *it, *next; | |
3198 | ||
3199 | lxc_list_for_each_safe(it, &c->id_map, next) { | |
3200 | lxc_list_del(it); | |
3201 | free(it->elem); | |
3202 | free(it); | |
3203 | } | |
3204 | return 0; | |
3205 | } | |
3206 | ||
1fb86a7c SH |
3207 | int lxc_clear_config_keepcaps(struct lxc_conf *c) |
3208 | { | |
3209 | struct lxc_list *it,*next; | |
3210 | ||
3211 | lxc_list_for_each_safe(it, &c->keepcaps, next) { | |
3212 | lxc_list_del(it); | |
3213 | free(it->elem); | |
3214 | free(it); | |
3215 | } | |
3216 | return 0; | |
3217 | } | |
3218 | ||
12a50cc6 | 3219 | int lxc_clear_cgroups(struct lxc_conf *c, const char *key) |
72d0e1cb | 3220 | { |
9ebb03ad | 3221 | struct lxc_list *it,*next; |
72d0e1cb | 3222 | bool all = false; |
12a50cc6 | 3223 | const char *k = key + 11; |
72d0e1cb SG |
3224 | |
3225 | if (strcmp(key, "lxc.cgroup") == 0) | |
3226 | all = true; | |
3227 | ||
9ebb03ad | 3228 | lxc_list_for_each_safe(it, &c->cgroup, next) { |
72d0e1cb SG |
3229 | struct lxc_cgroup *cg = it->elem; |
3230 | if (!all && strcmp(cg->subsystem, k) != 0) | |
3231 | continue; | |
3232 | lxc_list_del(it); | |
3233 | free(cg->subsystem); | |
3234 | free(cg->value); | |
3235 | free(cg); | |
3236 | free(it); | |
3237 | } | |
3238 | return 0; | |
3239 | } | |
3240 | ||
3241 | int lxc_clear_mount_entries(struct lxc_conf *c) | |
3242 | { | |
9ebb03ad | 3243 | struct lxc_list *it,*next; |
72d0e1cb | 3244 | |
9ebb03ad | 3245 | lxc_list_for_each_safe(it, &c->mount_list, next) { |
72d0e1cb SG |
3246 | lxc_list_del(it); |
3247 | free(it->elem); | |
3248 | free(it); | |
3249 | } | |
3250 | return 0; | |
3251 | } | |
3252 | ||
12a50cc6 | 3253 | int lxc_clear_hooks(struct lxc_conf *c, const char *key) |
72d0e1cb | 3254 | { |
9ebb03ad | 3255 | struct lxc_list *it,*next; |
17ed13a3 | 3256 | bool all = false, done = false; |
12a50cc6 | 3257 | const char *k = key + 9; |
72d0e1cb SG |
3258 | int i; |
3259 | ||
17ed13a3 SH |
3260 | if (strcmp(key, "lxc.hook") == 0) |
3261 | all = true; | |
3262 | ||
72d0e1cb | 3263 | for (i=0; i<NUM_LXC_HOOKS; i++) { |
17ed13a3 | 3264 | if (all || strcmp(k, lxchook_names[i]) == 0) { |
9ebb03ad | 3265 | lxc_list_for_each_safe(it, &c->hooks[i], next) { |
17ed13a3 SH |
3266 | lxc_list_del(it); |
3267 | free(it->elem); | |
3268 | free(it); | |
3269 | } | |
3270 | done = true; | |
72d0e1cb SG |
3271 | } |
3272 | } | |
17ed13a3 SH |
3273 | |
3274 | if (!done) { | |
3275 | ERROR("Invalid hook key: %s", key); | |
3276 | return -1; | |
3277 | } | |
72d0e1cb SG |
3278 | return 0; |
3279 | } | |
8eb5694b | 3280 | |
7b35f3d6 SH |
3281 | void lxc_clear_saved_nics(struct lxc_conf *conf) |
3282 | { | |
3283 | int i; | |
3284 | ||
3285 | if (!conf->num_savednics) | |
3286 | return; | |
3287 | for (i=0; i < conf->num_savednics; i++) | |
3288 | free(conf->saved_nics[i].orig_name); | |
3289 | conf->saved_nics = 0; | |
3290 | free(conf->saved_nics); | |
3291 | } | |
3292 | ||
8eb5694b SH |
3293 | void lxc_conf_free(struct lxc_conf *conf) |
3294 | { | |
3295 | if (!conf) | |
3296 | return; | |
3297 | if (conf->console.path) | |
3298 | free(conf->console.path); | |
54c30e29 | 3299 | if (conf->rootfs.mount) |
8eb5694b | 3300 | free(conf->rootfs.mount); |
d95db067 DE |
3301 | if (conf->rootfs.path) |
3302 | free(conf->rootfs.path); | |
3303 | if (conf->utsname) | |
3304 | free(conf->utsname); | |
3305 | if (conf->ttydir) | |
3306 | free(conf->ttydir); | |
3307 | if (conf->fstab) | |
3308 | free(conf->fstab); | |
fc7e8864 WM |
3309 | if (conf->rcfile) |
3310 | free(conf->rcfile); | |
8eb5694b | 3311 | lxc_clear_config_network(conf); |
1f530df6 | 3312 | #if HAVE_APPARMOR |
8eb5694b SH |
3313 | if (conf->aa_profile) |
3314 | free(conf->aa_profile); | |
1f530df6 | 3315 | #endif |
769872f9 | 3316 | lxc_seccomp_free(conf); |
8eb5694b | 3317 | lxc_clear_config_caps(conf); |
1fb86a7c | 3318 | lxc_clear_config_keepcaps(conf); |
8eb5694b | 3319 | lxc_clear_cgroups(conf, "lxc.cgroup"); |
17ed13a3 | 3320 | lxc_clear_hooks(conf, "lxc.hook"); |
8eb5694b | 3321 | lxc_clear_mount_entries(conf); |
7b35f3d6 | 3322 | lxc_clear_saved_nics(conf); |
27c27d73 | 3323 | lxc_clear_idmaps(conf); |
8eb5694b SH |
3324 | free(conf); |
3325 | } |