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Commit | Line | Data |
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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <dlezcano at fr.ibm.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #define _GNU_SOURCE | |
24 | #include <stdio.h> | |
25 | #undef _GNU_SOURCE | |
26 | #include <stdlib.h> | |
e3b4c4c4 | 27 | #include <stdarg.h> |
0ad19a3f | 28 | #include <errno.h> |
29 | #include <string.h> | |
30 | #include <dirent.h> | |
31 | #include <mntent.h> | |
32 | #include <unistd.h> | |
e3b4c4c4 | 33 | #include <sys/wait.h> |
e827ff7e SG |
34 | |
35 | #if HAVE_PTY_H | |
b0a33c1e | 36 | #include <pty.h> |
e827ff7e SG |
37 | #else |
38 | #include <../include/openpty.h> | |
39 | #endif | |
0ad19a3f | 40 | |
b3ecde1e DL |
41 | #include <linux/loop.h> |
42 | ||
0ad19a3f | 43 | #include <sys/types.h> |
44 | #include <sys/utsname.h> | |
45 | #include <sys/param.h> | |
46 | #include <sys/stat.h> | |
47 | #include <sys/socket.h> | |
48 | #include <sys/mount.h> | |
49 | #include <sys/mman.h> | |
81810dd1 | 50 | #include <sys/prctl.h> |
0ad19a3f | 51 | |
52 | #include <arpa/inet.h> | |
53 | #include <fcntl.h> | |
54 | #include <netinet/in.h> | |
55 | #include <net/if.h> | |
6f4a3756 | 56 | #include <libgen.h> |
0ad19a3f | 57 | |
e5bda9ee | 58 | #include "network.h" |
59 | #include "error.h" | |
b2718c72 | 60 | #include "parse.h" |
881450bb | 61 | #include "config.h" |
1b09f2c0 DL |
62 | #include "utils.h" |
63 | #include "conf.h" | |
64 | #include "log.h" | |
65 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
d55bc1ad | 66 | #include "caps.h" /* for lxc_caps_last_cap() */ |
36eb9bde | 67 | |
d0a36f2c SG |
68 | #if HAVE_APPARMOR |
69 | #include <apparmor.h> | |
70 | #endif | |
71 | ||
495d2046 SG |
72 | #if HAVE_SYS_CAPABILITY_H |
73 | #include <sys/capability.h> | |
74 | #endif | |
75 | ||
6ff05e18 SG |
76 | #if HAVE_SYS_PERSONALITY_H |
77 | #include <sys/personality.h> | |
78 | #endif | |
79 | ||
769872f9 SH |
80 | #include "lxcseccomp.h" |
81 | ||
36eb9bde | 82 | lxc_log_define(lxc_conf, lxc); |
e5bda9ee | 83 | |
0ad19a3f | 84 | #define MAXHWLEN 18 |
85 | #define MAXINDEXLEN 20 | |
442cbbe6 | 86 | #define MAXMTULEN 16 |
0ad19a3f | 87 | #define MAXLINELEN 128 |
88 | ||
968fbd36 SK |
89 | #ifndef MS_DIRSYNC |
90 | #define MS_DIRSYNC 128 | |
91 | #endif | |
92 | ||
fdc03323 DL |
93 | #ifndef MS_REC |
94 | #define MS_REC 16384 | |
95 | #endif | |
96 | ||
c08556c6 DL |
97 | #ifndef MNT_DETACH |
98 | #define MNT_DETACH 2 | |
99 | #endif | |
100 | ||
859a6da0 NC |
101 | #ifndef MS_SLAVE |
102 | #define MS_SLAVE (1<<19) | |
103 | #endif | |
104 | ||
88d413d5 SW |
105 | #ifndef MS_RELATIME |
106 | #define MS_RELATIME (1 << 21) | |
107 | #endif | |
108 | ||
109 | #ifndef MS_STRICTATIME | |
110 | #define MS_STRICTATIME (1 << 24) | |
111 | #endif | |
112 | ||
495d2046 | 113 | #if HAVE_SYS_CAPABILITY_H |
b09094da MN |
114 | #ifndef CAP_SETFCAP |
115 | #define CAP_SETFCAP 31 | |
116 | #endif | |
117 | ||
118 | #ifndef CAP_MAC_OVERRIDE | |
119 | #define CAP_MAC_OVERRIDE 32 | |
120 | #endif | |
121 | ||
122 | #ifndef CAP_MAC_ADMIN | |
123 | #define CAP_MAC_ADMIN 33 | |
124 | #endif | |
495d2046 | 125 | #endif |
b09094da MN |
126 | |
127 | #ifndef PR_CAPBSET_DROP | |
128 | #define PR_CAPBSET_DROP 24 | |
129 | #endif | |
130 | ||
9818cae4 SG |
131 | #ifndef LO_FLAGS_AUTOCLEAR |
132 | #define LO_FLAGS_AUTOCLEAR 4 | |
133 | #endif | |
134 | ||
72d0e1cb | 135 | char *lxchook_names[NUM_LXC_HOOKS] = { |
5ea6163a | 136 | "pre-start", "pre-mount", "mount", "start", "post-stop" }; |
72d0e1cb | 137 | |
bf601689 MH |
138 | extern int pivot_root(const char * new_root, const char * put_old); |
139 | ||
e3b4c4c4 | 140 | typedef int (*instanciate_cb)(struct lxc_handler *, struct lxc_netdev *); |
0ad19a3f | 141 | |
998ac676 RT |
142 | struct mount_opt { |
143 | char *name; | |
144 | int clear; | |
145 | int flag; | |
146 | }; | |
147 | ||
81810dd1 DL |
148 | struct caps_opt { |
149 | char *name; | |
150 | int value; | |
151 | }; | |
152 | ||
e3b4c4c4 ST |
153 | static int instanciate_veth(struct lxc_handler *, struct lxc_netdev *); |
154 | static int instanciate_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
155 | static int instanciate_vlan(struct lxc_handler *, struct lxc_netdev *); | |
156 | static int instanciate_phys(struct lxc_handler *, struct lxc_netdev *); | |
157 | static int instanciate_empty(struct lxc_handler *, struct lxc_netdev *); | |
82d5ae15 | 158 | |
24654103 DL |
159 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
160 | [LXC_NET_VETH] = instanciate_veth, | |
161 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
162 | [LXC_NET_VLAN] = instanciate_vlan, | |
163 | [LXC_NET_PHYS] = instanciate_phys, | |
164 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 165 | }; |
166 | ||
74a2b586 JK |
167 | static int shutdown_veth(struct lxc_handler *, struct lxc_netdev *); |
168 | static int shutdown_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
169 | static int shutdown_vlan(struct lxc_handler *, struct lxc_netdev *); | |
170 | static int shutdown_phys(struct lxc_handler *, struct lxc_netdev *); | |
171 | static int shutdown_empty(struct lxc_handler *, struct lxc_netdev *); | |
172 | ||
173 | static instanciate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
174 | [LXC_NET_VETH] = shutdown_veth, | |
175 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
176 | [LXC_NET_VLAN] = shutdown_vlan, | |
177 | [LXC_NET_PHYS] = shutdown_phys, | |
178 | [LXC_NET_EMPTY] = shutdown_empty, | |
179 | }; | |
180 | ||
998ac676 | 181 | static struct mount_opt mount_opt[] = { |
88d413d5 SW |
182 | { "defaults", 0, 0 }, |
183 | { "ro", 0, MS_RDONLY }, | |
184 | { "rw", 1, MS_RDONLY }, | |
185 | { "suid", 1, MS_NOSUID }, | |
186 | { "nosuid", 0, MS_NOSUID }, | |
187 | { "dev", 1, MS_NODEV }, | |
188 | { "nodev", 0, MS_NODEV }, | |
189 | { "exec", 1, MS_NOEXEC }, | |
190 | { "noexec", 0, MS_NOEXEC }, | |
191 | { "sync", 0, MS_SYNCHRONOUS }, | |
192 | { "async", 1, MS_SYNCHRONOUS }, | |
193 | { "dirsync", 0, MS_DIRSYNC }, | |
194 | { "remount", 0, MS_REMOUNT }, | |
195 | { "mand", 0, MS_MANDLOCK }, | |
196 | { "nomand", 1, MS_MANDLOCK }, | |
197 | { "atime", 1, MS_NOATIME }, | |
198 | { "noatime", 0, MS_NOATIME }, | |
199 | { "diratime", 1, MS_NODIRATIME }, | |
200 | { "nodiratime", 0, MS_NODIRATIME }, | |
201 | { "bind", 0, MS_BIND }, | |
202 | { "rbind", 0, MS_BIND|MS_REC }, | |
203 | { "relatime", 0, MS_RELATIME }, | |
204 | { "norelatime", 1, MS_RELATIME }, | |
205 | { "strictatime", 0, MS_STRICTATIME }, | |
206 | { "nostrictatime", 1, MS_STRICTATIME }, | |
207 | { NULL, 0, 0 }, | |
998ac676 RT |
208 | }; |
209 | ||
495d2046 | 210 | #if HAVE_SYS_CAPABILITY_H |
81810dd1 | 211 | static struct caps_opt caps_opt[] = { |
a6afdde9 | 212 | { "chown", CAP_CHOWN }, |
1e11be34 DL |
213 | { "dac_override", CAP_DAC_OVERRIDE }, |
214 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
215 | { "fowner", CAP_FOWNER }, | |
216 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
217 | { "kill", CAP_KILL }, |
218 | { "setgid", CAP_SETGID }, | |
219 | { "setuid", CAP_SETUID }, | |
220 | { "setpcap", CAP_SETPCAP }, | |
221 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
222 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
223 | { "net_broadcast", CAP_NET_BROADCAST }, | |
224 | { "net_admin", CAP_NET_ADMIN }, | |
225 | { "net_raw", CAP_NET_RAW }, | |
226 | { "ipc_lock", CAP_IPC_LOCK }, | |
227 | { "ipc_owner", CAP_IPC_OWNER }, | |
228 | { "sys_module", CAP_SYS_MODULE }, | |
229 | { "sys_rawio", CAP_SYS_RAWIO }, | |
230 | { "sys_chroot", CAP_SYS_CHROOT }, | |
231 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
232 | { "sys_pacct", CAP_SYS_PACCT }, | |
233 | { "sys_admin", CAP_SYS_ADMIN }, | |
234 | { "sys_boot", CAP_SYS_BOOT }, | |
235 | { "sys_nice", CAP_SYS_NICE }, | |
236 | { "sys_resource", CAP_SYS_RESOURCE }, | |
237 | { "sys_time", CAP_SYS_TIME }, | |
238 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
239 | { "mknod", CAP_MKNOD }, | |
240 | { "lease", CAP_LEASE }, | |
9527e566 | 241 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 242 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
243 | #endif |
244 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 245 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 246 | #endif |
81810dd1 DL |
247 | { "setfcap", CAP_SETFCAP }, |
248 | { "mac_override", CAP_MAC_OVERRIDE }, | |
249 | { "mac_admin", CAP_MAC_ADMIN }, | |
5170c716 CS |
250 | #ifdef CAP_SYSLOG |
251 | { "syslog", CAP_SYSLOG }, | |
252 | #endif | |
253 | #ifdef CAP_WAKE_ALARM | |
254 | { "wake_alarm", CAP_WAKE_ALARM }, | |
255 | #endif | |
81810dd1 | 256 | }; |
495d2046 SG |
257 | #else |
258 | static struct caps_opt caps_opt[] = {}; | |
259 | #endif | |
81810dd1 | 260 | |
91c3830e SH |
261 | static int run_buffer(char *buffer) |
262 | { | |
263 | FILE *f; | |
264 | char *output; | |
265 | ||
266 | f = popen(buffer, "r"); | |
267 | if (!f) { | |
268 | SYSERROR("popen failed"); | |
269 | return -1; | |
270 | } | |
271 | ||
272 | output = malloc(LXC_LOG_BUFFER_SIZE); | |
273 | if (!output) { | |
274 | ERROR("failed to allocate memory for script output"); | |
275 | return -1; | |
276 | } | |
277 | ||
278 | while(fgets(output, LXC_LOG_BUFFER_SIZE, f)) | |
279 | DEBUG("script output: %s", output); | |
280 | ||
281 | free(output); | |
282 | ||
283 | if (pclose(f) == -1) { | |
284 | SYSERROR("Script exited on error"); | |
285 | return -1; | |
286 | } | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
751d9dcd DL |
291 | static int run_script(const char *name, const char *section, |
292 | const char *script, ...) | |
e3b4c4c4 | 293 | { |
abbfd20b | 294 | int ret; |
91c3830e | 295 | char *buffer, *p; |
abbfd20b DL |
296 | size_t size = 0; |
297 | va_list ap; | |
751d9dcd DL |
298 | |
299 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
300 | script, name, section); | |
e3b4c4c4 | 301 | |
abbfd20b DL |
302 | va_start(ap, script); |
303 | while ((p = va_arg(ap, char *))) | |
95642a10 | 304 | size += strlen(p) + 1; |
abbfd20b DL |
305 | va_end(ap); |
306 | ||
307 | size += strlen(script); | |
308 | size += strlen(name); | |
309 | size += strlen(section); | |
95642a10 | 310 | size += 3; |
abbfd20b | 311 | |
95642a10 MS |
312 | if (size > INT_MAX) |
313 | return -1; | |
314 | ||
315 | buffer = alloca(size); | |
abbfd20b DL |
316 | if (!buffer) { |
317 | ERROR("failed to allocate memory"); | |
751d9dcd DL |
318 | return -1; |
319 | } | |
320 | ||
9ba8130c SH |
321 | ret = snprintf(buffer, size, "%s %s %s", script, name, section); |
322 | if (ret < 0 || ret >= size) { | |
323 | ERROR("Script name too long"); | |
324 | free(buffer); | |
325 | return -1; | |
326 | } | |
751d9dcd | 327 | |
abbfd20b | 328 | va_start(ap, script); |
9ba8130c SH |
329 | while ((p = va_arg(ap, char *))) { |
330 | int len = size-ret; | |
331 | int rc; | |
332 | rc = snprintf(buffer + ret, len, " %s", p); | |
333 | if (rc < 0 || rc >= len) { | |
334 | free(buffer); | |
335 | ERROR("Script args too long"); | |
336 | return -1; | |
337 | } | |
338 | ret += rc; | |
339 | } | |
abbfd20b | 340 | va_end(ap); |
751d9dcd | 341 | |
91c3830e | 342 | return run_buffer(buffer); |
e3b4c4c4 ST |
343 | } |
344 | ||
a6afdde9 | 345 | static int find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 346 | { |
347 | struct cbarg { | |
348 | const char *rootfs; | |
a6afdde9 | 349 | const char *target; |
78ae2fcc | 350 | int mntopt; |
351 | } *cbarg = data; | |
352 | ||
353 | char *fstype; | |
354 | ||
355 | /* we don't try 'nodev' entries */ | |
356 | if (strstr(buffer, "nodev")) | |
357 | return 0; | |
358 | ||
359 | fstype = buffer; | |
b2718c72 | 360 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
361 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 362 | |
a6afdde9 DL |
363 | DEBUG("trying to mount '%s'->'%s' with fstype '%s'", |
364 | cbarg->rootfs, cbarg->target, fstype); | |
365 | ||
366 | if (mount(cbarg->rootfs, cbarg->target, fstype, cbarg->mntopt, NULL)) { | |
367 | DEBUG("mount failed with error: %s", strerror(errno)); | |
78ae2fcc | 368 | return 0; |
a6afdde9 | 369 | } |
78ae2fcc | 370 | |
a6afdde9 DL |
371 | INFO("mounted '%s' on '%s', with fstype '%s'", |
372 | cbarg->rootfs, cbarg->target, fstype); | |
78ae2fcc | 373 | |
374 | return 1; | |
375 | } | |
376 | ||
2656d231 | 377 | static int mount_unknow_fs(const char *rootfs, const char *target, int mntopt) |
78ae2fcc | 378 | { |
a6afdde9 | 379 | int i; |
78ae2fcc | 380 | |
381 | struct cbarg { | |
382 | const char *rootfs; | |
a6afdde9 | 383 | const char *target; |
78ae2fcc | 384 | int mntopt; |
385 | } cbarg = { | |
386 | .rootfs = rootfs, | |
a6afdde9 | 387 | .target = target, |
78ae2fcc | 388 | .mntopt = mntopt, |
389 | }; | |
390 | ||
a6afdde9 DL |
391 | /* |
392 | * find the filesystem type with brute force: | |
393 | * first we check with /etc/filesystems, in case the modules | |
78ae2fcc | 394 | * are auto-loaded and fall back to the supported kernel fs |
395 | */ | |
396 | char *fsfile[] = { | |
397 | "/etc/filesystems", | |
398 | "/proc/filesystems", | |
399 | }; | |
400 | ||
a6afdde9 DL |
401 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { |
402 | ||
403 | int ret; | |
404 | ||
405 | if (access(fsfile[i], F_OK)) | |
406 | continue; | |
407 | ||
408 | ret = lxc_file_for_each_line(fsfile[i], find_fstype_cb, &cbarg); | |
409 | if (ret < 0) { | |
410 | ERROR("failed to parse '%s'", fsfile[i]); | |
411 | return -1; | |
412 | } | |
413 | ||
414 | if (ret) | |
415 | return 0; | |
78ae2fcc | 416 | } |
417 | ||
a6afdde9 DL |
418 | ERROR("failed to determine fs type for '%s'", rootfs); |
419 | return -1; | |
420 | } | |
421 | ||
2656d231 | 422 | static int mount_rootfs_dir(const char *rootfs, const char *target) |
a6afdde9 DL |
423 | { |
424 | return mount(rootfs, target, "none", MS_BIND | MS_REC, NULL); | |
425 | } | |
426 | ||
427 | static int setup_lodev(const char *rootfs, int fd, struct loop_info64 *loinfo) | |
428 | { | |
429 | int rfd; | |
430 | int ret = -1; | |
431 | ||
432 | rfd = open(rootfs, O_RDWR); | |
433 | if (rfd < 0) { | |
434 | SYSERROR("failed to open '%s'", rootfs); | |
78ae2fcc | 435 | return -1; |
436 | } | |
437 | ||
a6afdde9 | 438 | memset(loinfo, 0, sizeof(*loinfo)); |
78ae2fcc | 439 | |
a6afdde9 | 440 | loinfo->lo_flags = LO_FLAGS_AUTOCLEAR; |
78ae2fcc | 441 | |
a6afdde9 DL |
442 | if (ioctl(fd, LOOP_SET_FD, rfd)) { |
443 | SYSERROR("failed to LOOP_SET_FD"); | |
444 | goto out; | |
78ae2fcc | 445 | } |
446 | ||
a6afdde9 DL |
447 | if (ioctl(fd, LOOP_SET_STATUS64, loinfo)) { |
448 | SYSERROR("failed to LOOP_SET_STATUS64"); | |
78ae2fcc | 449 | goto out; |
450 | } | |
451 | ||
a6afdde9 | 452 | ret = 0; |
78ae2fcc | 453 | out: |
a6afdde9 | 454 | close(rfd); |
78ae2fcc | 455 | |
a6afdde9 | 456 | return ret; |
78ae2fcc | 457 | } |
458 | ||
2656d231 | 459 | static int mount_rootfs_file(const char *rootfs, const char *target) |
78ae2fcc | 460 | { |
a6afdde9 DL |
461 | struct dirent dirent, *direntp; |
462 | struct loop_info64 loinfo; | |
9ba8130c | 463 | int ret = -1, fd = -1, rc; |
a6afdde9 DL |
464 | DIR *dir; |
465 | char path[MAXPATHLEN]; | |
78ae2fcc | 466 | |
a6afdde9 DL |
467 | dir = opendir("/dev"); |
468 | if (!dir) { | |
469 | SYSERROR("failed to open '/dev'"); | |
78ae2fcc | 470 | return -1; |
471 | } | |
472 | ||
a6afdde9 DL |
473 | while (!readdir_r(dir, &dirent, &direntp)) { |
474 | ||
475 | if (!direntp) | |
476 | break; | |
477 | ||
478 | if (!strcmp(direntp->d_name, ".")) | |
479 | continue; | |
480 | ||
481 | if (!strcmp(direntp->d_name, "..")) | |
482 | continue; | |
483 | ||
484 | if (strncmp(direntp->d_name, "loop", 4)) | |
485 | continue; | |
486 | ||
9ba8130c SH |
487 | rc = snprintf(path, MAXPATHLEN, "/dev/%s", direntp->d_name); |
488 | if (rc < 0 || rc >= MAXPATHLEN) | |
489 | continue; | |
490 | ||
a6afdde9 DL |
491 | fd = open(path, O_RDWR); |
492 | if (fd < 0) | |
493 | continue; | |
494 | ||
495 | if (ioctl(fd, LOOP_GET_STATUS64, &loinfo) == 0) { | |
496 | close(fd); | |
497 | continue; | |
498 | } | |
499 | ||
500 | if (errno != ENXIO) { | |
501 | WARN("unexpected error for ioctl on '%s': %m", | |
502 | direntp->d_name); | |
503 | continue; | |
504 | } | |
505 | ||
506 | DEBUG("found '%s' free lodev", path); | |
507 | ||
508 | ret = setup_lodev(rootfs, fd, &loinfo); | |
509 | if (!ret) | |
2656d231 | 510 | ret = mount_unknow_fs(path, target, 0); |
a6afdde9 DL |
511 | close(fd); |
512 | ||
513 | break; | |
514 | } | |
515 | ||
516 | if (closedir(dir)) | |
517 | WARN("failed to close directory"); | |
518 | ||
519 | return ret; | |
78ae2fcc | 520 | } |
521 | ||
2656d231 | 522 | static int mount_rootfs_block(const char *rootfs, const char *target) |
a6afdde9 | 523 | { |
2656d231 | 524 | return mount_unknow_fs(rootfs, target, 0); |
a6afdde9 DL |
525 | } |
526 | ||
0c547523 SH |
527 | /* |
528 | * pin_rootfs | |
529 | * if rootfs is a directory, then open ${rootfs}.hold for writing for the | |
530 | * duration of the container run, to prevent the container from marking the | |
531 | * underlying fs readonly on shutdown. | |
532 | * return -1 on error. | |
533 | * return -2 if nothing needed to be pinned. | |
534 | * return an open fd (>=0) if we pinned it. | |
535 | */ | |
536 | int pin_rootfs(const char *rootfs) | |
537 | { | |
538 | char absrootfs[MAXPATHLEN]; | |
539 | char absrootfspin[MAXPATHLEN]; | |
540 | struct stat s; | |
541 | int ret, fd; | |
542 | ||
e99ee0de SH |
543 | if (rootfs == NULL || strlen(rootfs) == 0) |
544 | return 0; | |
545 | ||
0c547523 SH |
546 | if (!realpath(rootfs, absrootfs)) { |
547 | SYSERROR("failed to get real path for '%s'", rootfs); | |
548 | return -1; | |
549 | } | |
550 | ||
551 | if (access(absrootfs, F_OK)) { | |
552 | SYSERROR("'%s' is not accessible", absrootfs); | |
553 | return -1; | |
554 | } | |
555 | ||
556 | if (stat(absrootfs, &s)) { | |
557 | SYSERROR("failed to stat '%s'", absrootfs); | |
558 | return -1; | |
559 | } | |
560 | ||
561 | if (!__S_ISTYPE(s.st_mode, S_IFDIR)) | |
562 | return -2; | |
563 | ||
564 | ret = snprintf(absrootfspin, MAXPATHLEN, "%s%s", absrootfs, ".hold"); | |
565 | if (ret >= MAXPATHLEN) { | |
566 | SYSERROR("pathname too long for rootfs hold file"); | |
567 | return -1; | |
568 | } | |
569 | ||
570 | fd = open(absrootfspin, O_CREAT | O_RDWR, S_IWUSR|S_IRUSR); | |
571 | INFO("opened %s as fd %d\n", absrootfspin, fd); | |
572 | return fd; | |
573 | } | |
574 | ||
2656d231 | 575 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 576 | { |
b09ef133 | 577 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 578 | struct stat s; |
a6afdde9 | 579 | int i; |
78ae2fcc | 580 | |
a6afdde9 | 581 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 582 | |
583 | struct rootfs_type { | |
584 | int type; | |
585 | rootfs_cb cb; | |
586 | } rtfs_type[] = { | |
2656d231 DL |
587 | { S_IFDIR, mount_rootfs_dir }, |
588 | { S_IFBLK, mount_rootfs_block }, | |
589 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 590 | }; |
0ad19a3f | 591 | |
4c8ab83b | 592 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 593 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 594 | return -1; |
595 | } | |
b09ef133 | 596 | |
b09ef133 | 597 | if (access(absrootfs, F_OK)) { |
36eb9bde | 598 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 599 | return -1; |
600 | } | |
601 | ||
78ae2fcc | 602 | if (stat(absrootfs, &s)) { |
36eb9bde | 603 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 604 | return -1; |
605 | } | |
606 | ||
78ae2fcc | 607 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 608 | |
78ae2fcc | 609 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
610 | continue; | |
9b0f0477 | 611 | |
a6afdde9 | 612 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 613 | } |
9b0f0477 | 614 | |
36eb9bde | 615 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 616 | return -1; |
0ad19a3f | 617 | } |
618 | ||
4e5440c6 | 619 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 620 | { |
4e5440c6 DL |
621 | if (!utsname) |
622 | return 0; | |
0ad19a3f | 623 | |
4e5440c6 DL |
624 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
625 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 626 | return -1; |
627 | } | |
628 | ||
4e5440c6 | 629 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 630 | |
0ad19a3f | 631 | return 0; |
632 | } | |
633 | ||
33fcb7a0 | 634 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 635 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 636 | { |
7c6ef2a2 SH |
637 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
638 | int i, ret; | |
b0a33c1e | 639 | |
bc9bd0e3 DL |
640 | if (!rootfs->path) |
641 | return 0; | |
642 | ||
b0a33c1e | 643 | for (i = 0; i < tty_info->nbtty; i++) { |
644 | ||
645 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
646 | ||
7c6ef2a2 | 647 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 648 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
649 | if (ret >= sizeof(path)) { |
650 | ERROR("pathname too long for ttys"); | |
651 | return -1; | |
652 | } | |
653 | if (ttydir) { | |
654 | /* create dev/lxc/tty%d" */ | |
9ba8130c | 655 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", |
7c6ef2a2 SH |
656 | rootfs->mount, ttydir, i + 1); |
657 | if (ret >= sizeof(lxcpath)) { | |
658 | ERROR("pathname too long for ttys"); | |
659 | return -1; | |
660 | } | |
661 | ret = creat(lxcpath, 0660); | |
662 | if (ret==-1 && errno != EEXIST) { | |
663 | SYSERROR("error creating %s\n", lxcpath); | |
664 | return -1; | |
665 | } | |
666 | close(ret); | |
667 | ret = unlink(path); | |
668 | if (ret && errno != ENOENT) { | |
669 | SYSERROR("error unlinking %s\n", path); | |
670 | return -1; | |
671 | } | |
b0a33c1e | 672 | |
7c6ef2a2 SH |
673 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
674 | WARN("failed to mount '%s'->'%s'", | |
675 | pty_info->name, path); | |
676 | continue; | |
677 | } | |
13954cce | 678 | |
9ba8130c SH |
679 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
680 | if (ret >= sizeof(lxcpath)) { | |
681 | ERROR("tty pathname too long"); | |
682 | return -1; | |
683 | } | |
7c6ef2a2 SH |
684 | ret = symlink(lxcpath, path); |
685 | if (ret) { | |
686 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
687 | return -1; | |
688 | } | |
689 | } else { | |
c6883f38 SH |
690 | /* If we populated /dev, then we need to create /dev/ttyN */ |
691 | if (access(path, F_OK)) { | |
692 | ret = creat(path, 0660); | |
693 | if (ret==-1) { | |
694 | SYSERROR("error creating %s\n", path); | |
695 | /* this isn't fatal, continue */ | |
696 | } else | |
697 | close(ret); | |
698 | } | |
7c6ef2a2 SH |
699 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
700 | WARN("failed to mount '%s'->'%s'", | |
701 | pty_info->name, path); | |
702 | continue; | |
703 | } | |
b0a33c1e | 704 | } |
705 | } | |
706 | ||
cd54d859 DL |
707 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
708 | ||
b0a33c1e | 709 | return 0; |
710 | } | |
711 | ||
7a7ff0c6 | 712 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
713 | { |
714 | struct lxc_list *mountlist, *listentry, *iterator; | |
715 | char *pivotdir, *mountpoint, *mountentry; | |
716 | int found; | |
717 | void **cbparm; | |
718 | ||
719 | mountentry = buffer; | |
720 | cbparm = (void **)data; | |
721 | ||
722 | mountlist = cbparm[0]; | |
723 | pivotdir = cbparm[1]; | |
724 | ||
725 | /* parse entry, first field is mountname, ignore */ | |
726 | mountpoint = strtok(mountentry, " "); | |
727 | if (!mountpoint) | |
728 | return -1; | |
729 | ||
730 | /* second field is mountpoint */ | |
731 | mountpoint = strtok(NULL, " "); | |
732 | if (!mountpoint) | |
733 | return -1; | |
734 | ||
735 | /* only consider mountpoints below old root fs */ | |
736 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
737 | return 0; | |
738 | ||
739 | /* filter duplicate mountpoints */ | |
740 | found = 0; | |
741 | lxc_list_for_each(iterator, mountlist) { | |
742 | if (!strcmp(iterator->elem, mountpoint)) { | |
743 | found = 1; | |
744 | break; | |
745 | } | |
746 | } | |
747 | if (found) | |
748 | return 0; | |
749 | ||
750 | /* add entry to list */ | |
751 | listentry = malloc(sizeof(*listentry)); | |
752 | if (!listentry) { | |
753 | SYSERROR("malloc for mountpoint listentry failed"); | |
754 | return -1; | |
755 | } | |
756 | ||
757 | listentry->elem = strdup(mountpoint); | |
758 | if (!listentry->elem) { | |
759 | SYSERROR("strdup failed"); | |
760 | return -1; | |
761 | } | |
762 | lxc_list_add_tail(mountlist, listentry); | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
cc6f6dd7 | 767 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 768 | { |
2382ecff | 769 | char path[MAXPATHLEN]; |
bf601689 | 770 | void *cbparm[2]; |
9ebb03ad | 771 | struct lxc_list mountlist, *iterator, *next; |
bf601689 | 772 | int ok, still_mounted, last_still_mounted; |
9ba8130c | 773 | int rc; |
bf601689 MH |
774 | |
775 | /* read and parse /proc/mounts in old root fs */ | |
776 | lxc_list_init(&mountlist); | |
777 | ||
cc6f6dd7 | 778 | /* oldrootfs is on the top tree directory now */ |
9ba8130c SH |
779 | rc = snprintf(path, sizeof(path), "/%s", oldrootfs); |
780 | if (rc >= sizeof(path)) { | |
781 | ERROR("rootfs name too long"); | |
782 | return -1; | |
783 | } | |
bf601689 | 784 | cbparm[0] = &mountlist; |
bf601689 | 785 | |
cc6f6dd7 | 786 | cbparm[1] = strdup(path); |
bf601689 MH |
787 | if (!cbparm[1]) { |
788 | SYSERROR("strdup failed"); | |
789 | return -1; | |
790 | } | |
791 | ||
9ba8130c SH |
792 | rc = snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
793 | if (rc >= sizeof(path)) { | |
794 | ERROR("container proc/mounts name too long"); | |
795 | return -1; | |
796 | } | |
cc6f6dd7 DL |
797 | |
798 | ok = lxc_file_for_each_line(path, | |
799 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
800 | if (ok < 0) { |
801 | SYSERROR("failed to read or parse mount list '%s'", path); | |
802 | return -1; | |
803 | } | |
804 | ||
805 | /* umount filesystems until none left or list no longer shrinks */ | |
806 | still_mounted = 0; | |
807 | do { | |
808 | last_still_mounted = still_mounted; | |
809 | still_mounted = 0; | |
810 | ||
9ebb03ad | 811 | lxc_list_for_each_safe(iterator, &mountlist, next) { |
bf601689 | 812 | |
c08556c6 | 813 | /* umount normally */ |
bf601689 MH |
814 | if (!umount(iterator->elem)) { |
815 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
816 | lxc_list_del(iterator); | |
817 | continue; | |
818 | } | |
819 | ||
bf601689 MH |
820 | still_mounted++; |
821 | } | |
7df119ee | 822 | |
bf601689 MH |
823 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
824 | ||
7df119ee | 825 | |
c08556c6 DL |
826 | lxc_list_for_each(iterator, &mountlist) { |
827 | ||
828 | /* let's try a lazy umount */ | |
829 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
830 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
831 | continue; | |
832 | } | |
833 | ||
834 | /* be more brutal (nfs) */ | |
835 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
836 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
837 | continue; | |
838 | } | |
839 | ||
7df119ee | 840 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 841 | } |
bf601689 | 842 | |
cc6f6dd7 DL |
843 | return 0; |
844 | } | |
845 | ||
846 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
847 | { | |
848 | char path[MAXPATHLEN]; | |
849 | int remove_pivotdir = 0; | |
9ba8130c | 850 | int rc; |
cc6f6dd7 DL |
851 | |
852 | /* change into new root fs */ | |
853 | if (chdir(rootfs)) { | |
854 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
855 | return -1; | |
856 | } | |
857 | ||
858 | if (!pivotdir) | |
30c5d292 | 859 | pivotdir = "lxc_putold"; |
cc6f6dd7 | 860 | |
4f9293b1 | 861 | /* compute the full path to pivotdir under rootfs */ |
9ba8130c SH |
862 | rc = snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
863 | if (rc >= sizeof(path)) { | |
864 | ERROR("pivot dir name too long"); | |
865 | return -1; | |
866 | } | |
cc6f6dd7 DL |
867 | |
868 | if (access(path, F_OK)) { | |
869 | ||
870 | if (mkdir_p(path, 0755)) { | |
871 | SYSERROR("failed to create pivotdir '%s'", path); | |
872 | return -1; | |
873 | } | |
874 | ||
875 | remove_pivotdir = 1; | |
876 | DEBUG("created '%s' directory", path); | |
877 | } | |
878 | ||
879 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
880 | ||
881 | /* pivot_root into our new root fs */ | |
882 | if (pivot_root(".", path)) { | |
883 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
884 | return -1; |
885 | } | |
cc6f6dd7 DL |
886 | |
887 | if (chdir("/")) { | |
888 | SYSERROR("can't chdir to / after pivot_root"); | |
889 | return -1; | |
890 | } | |
891 | ||
892 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
893 | ||
894 | /* we switch from absolute path to relative path */ | |
895 | if (umount_oldrootfs(pivotdir)) | |
896 | return -1; | |
bf601689 | 897 | |
c08556c6 DL |
898 | /* remove temporary mount point, we don't consider the removing |
899 | * as fatal */ | |
a91d897a FW |
900 | if (remove_pivotdir && rmdir(pivotdir)) |
901 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 902 | |
bf601689 MH |
903 | return 0; |
904 | } | |
905 | ||
91c3830e SH |
906 | /* |
907 | * Do we want to add options for max size of /dev and a file to | |
908 | * specify which devices to create? | |
909 | */ | |
910 | static int mount_autodev(char *root) | |
911 | { | |
912 | int ret; | |
913 | char path[MAXPATHLEN]; | |
914 | ||
915 | INFO("Mounting /dev under %s\n", root); | |
916 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); | |
917 | if (ret < 0 || ret > MAXPATHLEN) | |
918 | return -1; | |
919 | ret = mount("none", path, "tmpfs", 0, "size=100000"); | |
920 | if (ret) { | |
921 | SYSERROR("Failed to mount /dev at %s\n", root); | |
922 | return -1; | |
923 | } | |
924 | ret = snprintf(path, MAXPATHLEN, "%s/dev/pts", root); | |
925 | if (ret < 0 || ret >= MAXPATHLEN) | |
926 | return -1; | |
927 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
928 | if (ret) { | |
929 | SYSERROR("Failed to create /dev/pts in container"); | |
930 | return -1; | |
931 | } | |
932 | ||
933 | INFO("Mounted /dev under %s\n", root); | |
934 | return 0; | |
935 | } | |
936 | ||
937 | /* | |
938 | * Try to run MAKEDEV console in the container. If something fails, | |
939 | * continue anyway as it should not be detrimental to the container. | |
940 | * This makes sure that things like /dev/vcs* exist. | |
941 | * (Pass devpath in to reduce stack usage) | |
942 | */ | |
943 | static void run_makedev(char *devpath) | |
944 | { | |
945 | int curd; | |
946 | int ret; | |
947 | ||
948 | curd = open(".", O_RDONLY); | |
949 | if (curd < 0) | |
950 | return; | |
951 | ret = chdir(devpath); | |
952 | if (ret) { | |
953 | close(curd); | |
954 | return; | |
955 | } | |
956 | if (run_buffer("/sbin/MAKEDEV console")) | |
957 | INFO("Error running MAKEDEV console in %s", devpath); | |
61435768 SH |
958 | ret = fchdir(curd); |
959 | if (ret) | |
960 | INFO("Error returning to original directory: expect breakage"); | |
91c3830e SH |
961 | close(curd); |
962 | } | |
963 | ||
c6883f38 SH |
964 | struct lxc_devs { |
965 | char *name; | |
966 | mode_t mode; | |
967 | int maj; | |
968 | int min; | |
969 | }; | |
970 | ||
971 | struct lxc_devs lxc_devs[] = { | |
972 | { "null", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 3 }, | |
973 | { "zero", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 5 }, | |
974 | { "full", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 7 }, | |
975 | { "urandom", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 9 }, | |
976 | { "random", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 8 }, | |
977 | { "tty", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 5, 0 }, | |
978 | { "console", S_IFCHR | S_IRUSR | S_IWUSR, 5, 1 }, | |
979 | }; | |
980 | ||
c6883f38 SH |
981 | static int setup_autodev(char *root) |
982 | { | |
983 | int ret; | |
984 | struct lxc_devs *d; | |
985 | char path[MAXPATHLEN]; | |
986 | int i; | |
3a32201c | 987 | mode_t cmask; |
c6883f38 | 988 | |
91c3830e SH |
989 | INFO("Creating initial consoles under %s/dev\n", root); |
990 | ||
c6883f38 | 991 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); |
91c3830e SH |
992 | if (ret < 0 || ret >= MAXPATHLEN) { |
993 | ERROR("Error calculating container /dev location"); | |
c6883f38 | 994 | return -1; |
91c3830e SH |
995 | } else |
996 | run_makedev(path); | |
997 | ||
998 | INFO("Populating /dev under %s\n", root); | |
3a32201c | 999 | cmask = umask(S_IXUSR | S_IXGRP | S_IXOTH); |
c6883f38 SH |
1000 | for (i = 0; i < sizeof(lxc_devs) / sizeof(lxc_devs[0]); i++) { |
1001 | d = &lxc_devs[i]; | |
1002 | ret = snprintf(path, MAXPATHLEN, "%s/dev/%s", root, d->name); | |
1003 | if (ret < 0 || ret >= MAXPATHLEN) | |
1004 | return -1; | |
1005 | ret = mknod(path, d->mode, makedev(d->maj, d->min)); | |
91c3830e | 1006 | if (ret && errno != EEXIST) { |
c6883f38 SH |
1007 | SYSERROR("Error creating %s\n", d->name); |
1008 | return -1; | |
1009 | } | |
1010 | } | |
3a32201c | 1011 | umask(cmask); |
c6883f38 SH |
1012 | |
1013 | INFO("Populated /dev under %s\n", root); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
cc28d0b0 SH |
1017 | /* |
1018 | * Detect whether / is mounted MS_SHARED. The only way I know of to | |
1019 | * check that is through /proc/self/mountinfo. | |
1020 | * I'm only checking for /. If the container rootfs or mount location | |
1021 | * is MS_SHARED, but not '/', then you're out of luck - figuring that | |
1022 | * out would be too much work to be worth it. | |
1023 | */ | |
1024 | #define LINELEN 4096 | |
1025 | int detect_shared_rootfs(void) | |
1026 | { | |
1027 | char buf[LINELEN], *p; | |
1028 | FILE *f; | |
1029 | int i; | |
1030 | char *p2; | |
1031 | ||
1032 | f = fopen("/proc/self/mountinfo", "r"); | |
1033 | if (!f) | |
1034 | return 0; | |
1035 | while ((p = fgets(buf, LINELEN, f))) { | |
1036 | INFO("looking at .%s.", p); | |
1037 | for (p = buf, i=0; p && i < 4; i++) | |
1038 | p = index(p+1, ' '); | |
1039 | if (!p) | |
1040 | continue; | |
1041 | p2 = index(p+1, ' '); | |
1042 | if (!p2) | |
1043 | continue; | |
1044 | *p2 = '\0'; | |
1045 | INFO("now p is .%s.", p); | |
1046 | if (strcmp(p+1, "/") == 0) { | |
1047 | // this is '/'. is it shared? | |
1048 | p = index(p2+1, ' '); | |
1049 | if (strstr(p, "shared:")) | |
1050 | return 1; | |
1051 | } | |
1052 | } | |
1053 | fclose(f); | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * I'll forgive you for asking whether all of this is needed :) The | |
1059 | * answer is yes. | |
1060 | * pivot_root will fail if the new root, the put_old dir, or the parent | |
1061 | * of current->fs->root are MS_SHARED. (parent of current->fs_root may | |
1062 | * or may not be current->fs_root - if we assumed it always was, we could | |
1063 | * just mount --make-rslave /). So, | |
1064 | * 1. mount a tiny tmpfs to be parent of current->fs->root. | |
1065 | * 2. make that MS_SLAVE | |
1066 | * 3. make a 'root' directory under that | |
1067 | * 4. mount --rbind / under the $tinyroot/root. | |
1068 | * 5. make that rslave | |
1069 | * 6. chdir and chroot into $tinyroot/root | |
1070 | * 7. $tinyroot will be unmounted by our parent in start.c | |
1071 | */ | |
1072 | static int chroot_into_slave(struct lxc_conf *conf) | |
1073 | { | |
1074 | char path[MAXPATHLEN]; | |
1075 | const char *destpath = conf->rootfs.mount; | |
1076 | int ret; | |
1077 | ||
1078 | if (mount(destpath, destpath, NULL, MS_BIND, 0)) { | |
1079 | SYSERROR("failed to mount %s bind", destpath); | |
1080 | return -1; | |
1081 | } | |
1082 | if (mount("", destpath, NULL, MS_SLAVE, 0)) { | |
1083 | SYSERROR("failed to make %s slave", destpath); | |
1084 | return -1; | |
1085 | } | |
1086 | if (mount("none", destpath, "tmpfs", 0, "size=10000")) { | |
1087 | SYSERROR("Failed to mount tmpfs / at %s", destpath); | |
1088 | return -1; | |
1089 | } | |
1090 | ret = snprintf(path, MAXPATHLEN, "%s/root", destpath); | |
1091 | if (ret < 0 || ret >= MAXPATHLEN) { | |
1092 | ERROR("out of memory making root path"); | |
1093 | return -1; | |
1094 | } | |
1095 | if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)) { | |
1096 | SYSERROR("Failed to create /dev/pts in container"); | |
1097 | return -1; | |
1098 | } | |
1099 | if (mount("/", path, NULL, MS_BIND|MS_REC, 0)) { | |
1100 | SYSERROR("Failed to rbind mount / to %s", path); | |
1101 | return -1; | |
1102 | } | |
1103 | if (mount("", destpath, NULL, MS_SLAVE|MS_REC, 0)) { | |
1104 | SYSERROR("Failed to make tmp-/ at %s rslave", path); | |
1105 | return -1; | |
1106 | } | |
1107 | if (chdir(path)) { | |
1108 | SYSERROR("Failed to chdir into tmp-/"); | |
1109 | return -1; | |
1110 | } | |
1111 | if (chroot(path)) { | |
1112 | SYSERROR("Failed to chroot into tmp-/"); | |
1113 | return -1; | |
1114 | } | |
1115 | INFO("Chrooted into tmp-/ at %s\n", path); | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static int setup_rootfs(struct lxc_conf *conf) | |
0ad19a3f | 1120 | { |
cc28d0b0 SH |
1121 | const struct lxc_rootfs *rootfs = &conf->rootfs; |
1122 | ||
33fcb7a0 | 1123 | if (!rootfs->path) |
c69bd12f | 1124 | return 0; |
0ad19a3f | 1125 | |
12297168 | 1126 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 1127 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 1128 | rootfs->mount); |
b1789442 DL |
1129 | return -1; |
1130 | } | |
1131 | ||
cc28d0b0 SH |
1132 | if (detect_shared_rootfs()) { |
1133 | if (chroot_into_slave(conf)) { | |
1134 | ERROR("Failed to chroot into slave /"); | |
1135 | return -1; | |
1136 | } | |
1137 | } | |
1138 | ||
2656d231 | 1139 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 1140 | ERROR("failed to mount rootfs"); |
c3f0a28c | 1141 | return -1; |
1142 | } | |
0ad19a3f | 1143 | |
12297168 | 1144 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 1145 | |
ac778708 DL |
1146 | return 0; |
1147 | } | |
1148 | ||
1149 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
1150 | { | |
ac778708 DL |
1151 | if (!rootfs->path) |
1152 | return 0; | |
1153 | ||
12297168 | 1154 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 1155 | ERROR("failed to setup pivot root"); |
25368b52 | 1156 | return -1; |
c69bd12f DL |
1157 | } |
1158 | ||
25368b52 | 1159 | return 0; |
0ad19a3f | 1160 | } |
1161 | ||
d852c78c | 1162 | static int setup_pts(int pts) |
3c26f34e | 1163 | { |
77890c6d SW |
1164 | char target[PATH_MAX]; |
1165 | ||
d852c78c DL |
1166 | if (!pts) |
1167 | return 0; | |
3c26f34e | 1168 | |
1169 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 1170 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 1171 | return -1; |
1172 | } | |
1173 | ||
a6afdde9 DL |
1174 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
1175 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 1176 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 1177 | return -1; |
1178 | } | |
1179 | ||
3c26f34e | 1180 | if (access("/dev/ptmx", F_OK)) { |
1181 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
1182 | goto out; | |
36eb9bde | 1183 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1184 | return -1; |
1185 | } | |
1186 | ||
77890c6d SW |
1187 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
1188 | goto out; | |
1189 | ||
3c26f34e | 1190 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
1191 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 1192 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1193 | return -1; |
1194 | } | |
cd54d859 DL |
1195 | |
1196 | INFO("created new pts instance"); | |
d852c78c | 1197 | |
3c26f34e | 1198 | out: |
1199 | return 0; | |
1200 | } | |
1201 | ||
cccc74b5 DL |
1202 | static int setup_personality(int persona) |
1203 | { | |
6ff05e18 | 1204 | #if HAVE_SYS_PERSONALITY_H |
cccc74b5 DL |
1205 | if (persona == -1) |
1206 | return 0; | |
1207 | ||
1208 | if (personality(persona) < 0) { | |
1209 | SYSERROR("failed to set personality to '0x%x'", persona); | |
1210 | return -1; | |
1211 | } | |
1212 | ||
1213 | INFO("set personality to '0x%x'", persona); | |
6ff05e18 | 1214 | #endif |
cccc74b5 DL |
1215 | |
1216 | return 0; | |
1217 | } | |
1218 | ||
7c6ef2a2 | 1219 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 1220 | const struct lxc_console *console) |
6e590161 | 1221 | { |
63376d7d DL |
1222 | char path[MAXPATHLEN]; |
1223 | struct stat s; | |
7c6ef2a2 | 1224 | int ret; |
52e35957 | 1225 | |
7c6ef2a2 SH |
1226 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
1227 | if (ret >= sizeof(path)) { | |
1228 | ERROR("console path too long\n"); | |
1229 | return -1; | |
1230 | } | |
52e35957 | 1231 | |
63376d7d | 1232 | if (access(path, F_OK)) { |
466978b0 | 1233 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 1234 | return 0; |
52e35957 DL |
1235 | } |
1236 | ||
f78a1f32 | 1237 | if (console->peer == -1) { |
63376d7d | 1238 | INFO("no console output required"); |
f78a1f32 DL |
1239 | return 0; |
1240 | } | |
ed502555 | 1241 | |
63376d7d DL |
1242 | if (stat(path, &s)) { |
1243 | SYSERROR("failed to stat '%s'", path); | |
1244 | return -1; | |
1245 | } | |
1246 | ||
1247 | if (chmod(console->name, s.st_mode)) { | |
1248 | SYSERROR("failed to set mode '0%o' to '%s'", | |
1249 | s.st_mode, console->name); | |
1250 | return -1; | |
1251 | } | |
13954cce | 1252 | |
63376d7d DL |
1253 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
1254 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 1255 | return -1; |
1256 | } | |
1257 | ||
63376d7d | 1258 | INFO("console has been setup"); |
7c6ef2a2 SH |
1259 | return 0; |
1260 | } | |
1261 | ||
1262 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
1263 | const struct lxc_console *console, | |
1264 | char *ttydir) | |
1265 | { | |
1266 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
1267 | int ret; | |
1268 | ||
1269 | /* create rootfs/dev/<ttydir> directory */ | |
1270 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
1271 | ttydir); | |
1272 | if (ret >= sizeof(path)) | |
1273 | return -1; | |
1274 | ret = mkdir(path, 0755); | |
1275 | if (ret && errno != EEXIST) { | |
1276 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
1277 | return -1; | |
1278 | } | |
1279 | INFO("created %s\n", path); | |
1280 | ||
1281 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
1282 | rootfs->mount, ttydir); | |
1283 | if (ret >= sizeof(lxcpath)) { | |
1284 | ERROR("console path too long\n"); | |
1285 | return -1; | |
1286 | } | |
1287 | ||
1288 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
1289 | ret = unlink(path); | |
1290 | if (ret && errno != ENOENT) { | |
1291 | SYSERROR("error unlinking %s\n", path); | |
1292 | return -1; | |
1293 | } | |
1294 | ||
1295 | ret = creat(lxcpath, 0660); | |
1296 | if (ret==-1 && errno != EEXIST) { | |
1297 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
1298 | return -1; | |
1299 | } | |
1300 | close(ret); | |
1301 | ||
1302 | if (console->peer == -1) { | |
1303 | INFO("no console output required"); | |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
1308 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
1309 | return -1; | |
1310 | } | |
1311 | ||
1312 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
9ba8130c SH |
1313 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); |
1314 | if (ret >= sizeof(lxcpath)) { | |
1315 | ERROR("lxc/console path too long"); | |
1316 | return -1; | |
1317 | } | |
7c6ef2a2 SH |
1318 | ret = symlink(lxcpath, path); |
1319 | if (ret) { | |
1320 | SYSERROR("failed to create symlink for console"); | |
1321 | return -1; | |
1322 | } | |
1323 | ||
1324 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 1325 | |
6e590161 | 1326 | return 0; |
1327 | } | |
1328 | ||
7c6ef2a2 SH |
1329 | static int setup_console(const struct lxc_rootfs *rootfs, |
1330 | const struct lxc_console *console, | |
1331 | char *ttydir) | |
1332 | { | |
1333 | /* We don't have a rootfs, /dev/console will be shared */ | |
1334 | if (!rootfs->path) | |
1335 | return 0; | |
1336 | if (!ttydir) | |
1337 | return setup_dev_console(rootfs, console); | |
1338 | ||
1339 | return setup_ttydir_console(rootfs, console, ttydir); | |
1340 | } | |
1341 | ||
1bd051a6 SH |
1342 | static int setup_kmsg(const struct lxc_rootfs *rootfs, |
1343 | const struct lxc_console *console) | |
1344 | { | |
1345 | char kpath[MAXPATHLEN]; | |
1346 | int ret; | |
1347 | ||
222fea5a DE |
1348 | if (!rootfs->path) |
1349 | return 0; | |
1bd051a6 SH |
1350 | ret = snprintf(kpath, sizeof(kpath), "%s/dev/kmsg", rootfs->mount); |
1351 | if (ret < 0 || ret >= sizeof(kpath)) | |
1352 | return -1; | |
1353 | ||
1354 | ret = unlink(kpath); | |
1355 | if (ret && errno != ENOENT) { | |
1356 | SYSERROR("error unlinking %s\n", kpath); | |
1357 | return -1; | |
1358 | } | |
1359 | ||
1360 | ret = symlink("console", kpath); | |
1361 | if (ret) { | |
1362 | SYSERROR("failed to create symlink for kmsg"); | |
1363 | return -1; | |
1364 | } | |
1365 | ||
1366 | return 0; | |
1367 | } | |
1368 | ||
cc28d0b0 | 1369 | int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 1370 | { |
102a5303 DL |
1371 | struct lxc_list *iterator; |
1372 | struct lxc_cgroup *cg; | |
88329c69 | 1373 | int ret = -1; |
6f4a3756 | 1374 | |
102a5303 DL |
1375 | if (lxc_list_empty(cgroups)) |
1376 | return 0; | |
6f4a3756 | 1377 | |
102a5303 | 1378 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 1379 | |
102a5303 | 1380 | cg = iterator->elem; |
6f4a3756 | 1381 | |
102a5303 | 1382 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 1383 | goto out; |
6f4a3756 | 1384 | |
102a5303 | 1385 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 1386 | } |
13954cce | 1387 | |
88329c69 | 1388 | ret = 0; |
cd54d859 | 1389 | INFO("cgroup has been setup"); |
88329c69 MN |
1390 | out: |
1391 | return ret; | |
576f946d | 1392 | } |
1393 | ||
998ac676 RT |
1394 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
1395 | { | |
1396 | struct mount_opt *mo; | |
1397 | ||
1398 | /* If opt is found in mount_opt, set or clear flags. | |
1399 | * Otherwise append it to data. */ | |
1400 | ||
1401 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1402 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1403 | if (mo->clear) | |
1404 | *flags &= ~mo->flag; | |
1405 | else | |
1406 | *flags |= mo->flag; | |
1407 | return; | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | if (strlen(*data)) | |
1412 | strcat(*data, ","); | |
1413 | strcat(*data, opt); | |
1414 | } | |
1415 | ||
911324ef | 1416 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1417 | char **mntdata) |
1418 | { | |
1419 | char *s, *data; | |
1420 | char *p, *saveptr = NULL; | |
1421 | ||
911324ef | 1422 | *mntdata = NULL; |
91656ce5 | 1423 | *mntflags = 0L; |
911324ef DL |
1424 | |
1425 | if (!mntopts) | |
998ac676 RT |
1426 | return 0; |
1427 | ||
911324ef | 1428 | s = strdup(mntopts); |
998ac676 | 1429 | if (!s) { |
36eb9bde | 1430 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1431 | return -1; |
1432 | } | |
1433 | ||
1434 | data = malloc(strlen(s) + 1); | |
1435 | if (!data) { | |
36eb9bde | 1436 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1437 | free(s); |
1438 | return -1; | |
1439 | } | |
1440 | *data = 0; | |
1441 | ||
1442 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1443 | p = strtok_r(NULL, ",", &saveptr)) | |
1444 | parse_mntopt(p, mntflags, &data); | |
1445 | ||
1446 | if (*data) | |
1447 | *mntdata = data; | |
1448 | else | |
1449 | free(data); | |
1450 | free(s); | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | ||
911324ef DL |
1455 | static int mount_entry(const char *fsname, const char *target, |
1456 | const char *fstype, unsigned long mountflags, | |
1457 | const char *data) | |
1458 | { | |
1459 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1460 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1461 | return -1; | |
1462 | } | |
1463 | ||
1464 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1465 | ||
1466 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1467 | fsname, target); | |
1468 | ||
1469 | if (mount(fsname, target, fstype, | |
1470 | mountflags | MS_REMOUNT, data)) { | |
1471 | SYSERROR("failed to mount '%s' on '%s'", | |
1472 | fsname, target); | |
1473 | return -1; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1483 | { |
998ac676 RT |
1484 | unsigned long mntflags; |
1485 | char *mntdata; | |
911324ef DL |
1486 | int ret; |
1487 | ||
1488 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1489 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1490 | return -1; | |
1491 | } | |
1492 | ||
1493 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1494 | mntent->mnt_type, mntflags, mntdata); | |
1495 | ||
1496 | free(mntdata); | |
1497 | ||
1498 | return ret; | |
1499 | } | |
1500 | ||
1501 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
80a881b2 SH |
1502 | const struct lxc_rootfs *rootfs, |
1503 | const char *lxc_name) | |
911324ef | 1504 | { |
013bd428 | 1505 | char *aux; |
59760f5d | 1506 | char path[MAXPATHLEN]; |
911324ef DL |
1507 | unsigned long mntflags; |
1508 | char *mntdata; | |
80a881b2 | 1509 | int r, ret = 0, offset; |
0ad19a3f | 1510 | |
911324ef DL |
1511 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1512 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1513 | return -1; | |
1514 | } | |
1bc60a65 | 1515 | |
80a881b2 | 1516 | /* if rootfs->path is a blockdev path, allow container fstab to |
e29bf450 DE |
1517 | * use $LXCPATH/CN/rootfs as the target prefix */ |
1518 | r = snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs", lxc_name); | |
80a881b2 SH |
1519 | if (r < 0 || r >= MAXPATHLEN) |
1520 | goto skipvarlib; | |
1521 | ||
1522 | aux = strstr(mntent->mnt_dir, path); | |
1523 | if (aux) { | |
1524 | offset = strlen(path); | |
1525 | goto skipabs; | |
1526 | } | |
1527 | ||
1528 | skipvarlib: | |
013bd428 DL |
1529 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1530 | if (!aux) { | |
1531 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1532 | goto out; | |
1533 | } | |
80a881b2 SH |
1534 | offset = strlen(rootfs->path); |
1535 | ||
1536 | skipabs: | |
013bd428 | 1537 | |
9ba8130c | 1538 | r = snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
80a881b2 SH |
1539 | aux + offset); |
1540 | if (r < 0 || r >= MAXPATHLEN) { | |
1541 | WARN("pathnme too long for '%s'", mntent->mnt_dir); | |
1542 | ret = -1; | |
1543 | goto out; | |
1544 | } | |
1545 | ||
d330fe7b | 1546 | |
013bd428 | 1547 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1548 | mntflags, mntdata); |
0ad19a3f | 1549 | |
013bd428 | 1550 | out: |
911324ef DL |
1551 | free(mntdata); |
1552 | return ret; | |
1553 | } | |
d330fe7b | 1554 | |
911324ef DL |
1555 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1556 | const char *rootfs) | |
1557 | { | |
1558 | char path[MAXPATHLEN]; | |
1559 | unsigned long mntflags; | |
1560 | char *mntdata; | |
1561 | int ret; | |
d330fe7b | 1562 | |
911324ef DL |
1563 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1564 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1565 | return -1; | |
1566 | } | |
d330fe7b | 1567 | |
911324ef | 1568 | /* relative to root mount point */ |
9ba8130c SH |
1569 | ret = snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); |
1570 | if (ret >= sizeof(path)) { | |
1571 | ERROR("path name too long"); | |
1572 | return -1; | |
1573 | } | |
911324ef DL |
1574 | |
1575 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1576 | mntflags, mntdata); | |
1577 | ||
1578 | free(mntdata); | |
998ac676 | 1579 | |
911324ef DL |
1580 | return ret; |
1581 | } | |
1582 | ||
80a881b2 SH |
1583 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file, |
1584 | const char *lxc_name) | |
911324ef DL |
1585 | { |
1586 | struct mntent *mntent; | |
1587 | int ret = -1; | |
e76b8764 | 1588 | |
911324ef | 1589 | while ((mntent = getmntent(file))) { |
e76b8764 | 1590 | |
911324ef DL |
1591 | if (!rootfs->path) { |
1592 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1593 | goto out; |
911324ef | 1594 | continue; |
e76b8764 CDC |
1595 | } |
1596 | ||
911324ef DL |
1597 | /* We have a separate root, mounts are relative to it */ |
1598 | if (mntent->mnt_dir[0] != '/') { | |
1599 | if (mount_entry_on_relative_rootfs(mntent, | |
1600 | rootfs->mount)) | |
1601 | goto out; | |
1602 | continue; | |
1603 | } | |
cd54d859 | 1604 | |
80a881b2 | 1605 | if (mount_entry_on_absolute_rootfs(mntent, rootfs, lxc_name)) |
911324ef | 1606 | goto out; |
0ad19a3f | 1607 | } |
cd54d859 | 1608 | |
0ad19a3f | 1609 | ret = 0; |
cd54d859 DL |
1610 | |
1611 | INFO("mount points have been setup"); | |
0ad19a3f | 1612 | out: |
e7938e9e MN |
1613 | return ret; |
1614 | } | |
1615 | ||
80a881b2 SH |
1616 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab, |
1617 | const char *lxc_name) | |
e7938e9e MN |
1618 | { |
1619 | FILE *file; | |
1620 | int ret; | |
1621 | ||
1622 | if (!fstab) | |
1623 | return 0; | |
1624 | ||
1625 | file = setmntent(fstab, "r"); | |
1626 | if (!file) { | |
1627 | SYSERROR("failed to use '%s'", fstab); | |
1628 | return -1; | |
1629 | } | |
1630 | ||
80a881b2 | 1631 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e | 1632 | |
0ad19a3f | 1633 | endmntent(file); |
1634 | return ret; | |
1635 | } | |
1636 | ||
80a881b2 SH |
1637 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount, |
1638 | const char *lxc_name) | |
e7938e9e MN |
1639 | { |
1640 | FILE *file; | |
1641 | struct lxc_list *iterator; | |
1642 | char *mount_entry; | |
1643 | int ret; | |
1644 | ||
1645 | file = tmpfile(); | |
1646 | if (!file) { | |
1647 | ERROR("tmpfile error: %m"); | |
1648 | return -1; | |
1649 | } | |
1650 | ||
1651 | lxc_list_for_each(iterator, mount) { | |
1652 | mount_entry = iterator->elem; | |
1d6b1976 | 1653 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1654 | } |
1655 | ||
1656 | rewind(file); | |
1657 | ||
80a881b2 | 1658 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e MN |
1659 | |
1660 | fclose(file); | |
1661 | return ret; | |
1662 | } | |
1663 | ||
81810dd1 DL |
1664 | static int setup_caps(struct lxc_list *caps) |
1665 | { | |
1666 | struct lxc_list *iterator; | |
1667 | char *drop_entry; | |
d55bc1ad | 1668 | char *ptr; |
81810dd1 DL |
1669 | int i, capid; |
1670 | ||
1671 | lxc_list_for_each(iterator, caps) { | |
1672 | ||
1673 | drop_entry = iterator->elem; | |
1674 | ||
1675 | capid = -1; | |
1676 | ||
1677 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1678 | ||
1679 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1680 | continue; | |
1681 | ||
1682 | capid = caps_opt[i].value; | |
1683 | break; | |
1684 | } | |
1685 | ||
d55bc1ad CS |
1686 | if (capid < 0) { |
1687 | /* try to see if it's numeric, so the user may specify | |
1688 | * capabilities that the running kernel knows about but | |
1689 | * we don't */ | |
1690 | capid = strtol(drop_entry, &ptr, 10); | |
1691 | if (!ptr || *ptr != '\0' || | |
1692 | capid == LONG_MIN || capid == LONG_MAX) | |
1693 | /* not a valid number */ | |
1694 | capid = -1; | |
1695 | else if (capid > lxc_caps_last_cap()) | |
1696 | /* we have a number but it's not a valid | |
1697 | * capability */ | |
1698 | capid = -1; | |
1699 | } | |
1700 | ||
81810dd1 | 1701 | if (capid < 0) { |
1e11be34 DL |
1702 | ERROR("unknown capability %s", drop_entry); |
1703 | return -1; | |
81810dd1 DL |
1704 | } |
1705 | ||
1706 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1707 | ||
1708 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1709 | SYSERROR("failed to remove %s capability", drop_entry); | |
1710 | return -1; | |
1711 | } | |
1712 | ||
1713 | } | |
1714 | ||
1715 | DEBUG("capabilities has been setup"); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
0ad19a3f | 1720 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1721 | { | |
1722 | struct sockaddr sockaddr; | |
1723 | struct ifreq ifr; | |
1724 | int ret, fd; | |
1725 | ||
3cfc0f3a MN |
1726 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1727 | if (ret) { | |
1728 | ERROR("mac address '%s' conversion failed : %s", | |
1729 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1730 | return -1; |
1731 | } | |
1732 | ||
1733 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1734 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1735 | ||
1736 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1737 | if (fd < 0) { | |
3ab87b66 | 1738 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1739 | return -1; |
1740 | } | |
1741 | ||
1742 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1743 | close(fd); | |
1744 | if (ret) | |
3ab87b66 | 1745 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1746 | |
cd54d859 DL |
1747 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1748 | ||
0ad19a3f | 1749 | return ret; |
1750 | } | |
1751 | ||
82d5ae15 | 1752 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1753 | { |
82d5ae15 DL |
1754 | struct lxc_list *iterator; |
1755 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1756 | int err; |
0ad19a3f | 1757 | |
82d5ae15 DL |
1758 | lxc_list_for_each(iterator, ip) { |
1759 | ||
1760 | inetdev = iterator->elem; | |
1761 | ||
0093bb8c DL |
1762 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1763 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1764 | if (err) { |
1765 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1766 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1767 | return -1; |
1768 | } | |
1769 | } | |
1770 | ||
1771 | return 0; | |
0ad19a3f | 1772 | } |
1773 | ||
82d5ae15 | 1774 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1775 | { |
82d5ae15 | 1776 | struct lxc_list *iterator; |
7fa9074f | 1777 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1778 | int err; |
0ad19a3f | 1779 | |
82d5ae15 DL |
1780 | lxc_list_for_each(iterator, ip) { |
1781 | ||
1782 | inet6dev = iterator->elem; | |
1783 | ||
b3df193c | 1784 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1785 | &inet6dev->mcast, &inet6dev->acast, |
1786 | inet6dev->prefix); | |
3cfc0f3a MN |
1787 | if (err) { |
1788 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1789 | ifindex, strerror(-err)); | |
82d5ae15 | 1790 | return -1; |
3cfc0f3a | 1791 | } |
82d5ae15 DL |
1792 | } |
1793 | ||
1794 | return 0; | |
0ad19a3f | 1795 | } |
1796 | ||
82d5ae15 | 1797 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1798 | { |
0ad19a3f | 1799 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1800 | char *current_ifname = ifname; |
3cfc0f3a | 1801 | int err; |
0ad19a3f | 1802 | |
82d5ae15 DL |
1803 | /* empty network namespace */ |
1804 | if (!netdev->ifindex) { | |
b0efbac4 | 1805 | if (netdev->flags & IFF_UP) { |
d472214b | 1806 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1807 | if (err) { |
1808 | ERROR("failed to set the loopback up : %s", | |
1809 | strerror(-err)); | |
82d5ae15 DL |
1810 | return -1; |
1811 | } | |
82d5ae15 | 1812 | } |
7b57e8b6 | 1813 | return 0; |
0ad19a3f | 1814 | } |
13954cce | 1815 | |
82d5ae15 DL |
1816 | /* retrieve the name of the interface */ |
1817 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1818 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1819 | netdev->ifindex); |
0ad19a3f | 1820 | return -1; |
1821 | } | |
13954cce | 1822 | |
018ef520 | 1823 | /* default: let the system to choose one interface name */ |
9d083402 | 1824 | if (!netdev->name) |
fb6d9b2f DL |
1825 | netdev->name = netdev->type == LXC_NET_PHYS ? |
1826 | netdev->link : "eth%d"; | |
018ef520 | 1827 | |
82d5ae15 | 1828 | /* rename the interface name */ |
b84f58b9 | 1829 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
1830 | if (err) { |
1831 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1832 | strerror(-err)); | |
018ef520 DL |
1833 | return -1; |
1834 | } | |
1835 | ||
1836 | /* Re-read the name of the interface because its name has changed | |
1837 | * and would be automatically allocated by the system | |
1838 | */ | |
82d5ae15 | 1839 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1840 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1841 | netdev->ifindex); |
018ef520 | 1842 | return -1; |
0ad19a3f | 1843 | } |
1844 | ||
82d5ae15 DL |
1845 | /* set a mac address */ |
1846 | if (netdev->hwaddr) { | |
1847 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1848 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1849 | current_ifname); |
0ad19a3f | 1850 | return -1; |
1851 | } | |
1852 | } | |
1853 | ||
82d5ae15 DL |
1854 | /* setup ipv4 addresses on the interface */ |
1855 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1856 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1857 | ifname); |
1858 | return -1; | |
1859 | } | |
1860 | ||
82d5ae15 DL |
1861 | /* setup ipv6 addresses on the interface */ |
1862 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1863 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1864 | ifname); |
1865 | return -1; | |
1866 | } | |
1867 | ||
82d5ae15 | 1868 | /* set the network device up */ |
b0efbac4 | 1869 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1870 | int err; |
1871 | ||
d472214b | 1872 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
1873 | if (err) { |
1874 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1875 | strerror(-err)); | |
0ad19a3f | 1876 | return -1; |
1877 | } | |
1878 | ||
1879 | /* the network is up, make the loopback up too */ | |
d472214b | 1880 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1881 | if (err) { |
1882 | ERROR("failed to set the loopback up : %s", | |
1883 | strerror(-err)); | |
0ad19a3f | 1884 | return -1; |
1885 | } | |
1886 | } | |
1887 | ||
f8fee0e2 MK |
1888 | /* We can only set up the default routes after bringing |
1889 | * up the interface, sine bringing up the interface adds | |
1890 | * the link-local routes and we can't add a default | |
1891 | * route if the gateway is not reachable. */ | |
1892 | ||
1893 | /* setup ipv4 gateway on the interface */ | |
1894 | if (netdev->ipv4_gateway) { | |
1895 | if (!(netdev->flags & IFF_UP)) { | |
1896 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
1897 | return -1; | |
1898 | } | |
1899 | ||
1900 | if (lxc_list_empty(&netdev->ipv4)) { | |
1901 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
1902 | return -1; | |
1903 | } | |
1904 | ||
1905 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
1906 | if (err) { | |
1907 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
1908 | ifname, strerror(-err)); | |
19a26f82 MK |
1909 | if (netdev->ipv4_gateway_auto) { |
1910 | char buf[INET_ADDRSTRLEN]; | |
1911 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
1912 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
1913 | } | |
f8fee0e2 MK |
1914 | return -1; |
1915 | } | |
1916 | } | |
1917 | ||
1918 | /* setup ipv6 gateway on the interface */ | |
1919 | if (netdev->ipv6_gateway) { | |
1920 | if (!(netdev->flags & IFF_UP)) { | |
1921 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
1922 | return -1; | |
1923 | } | |
1924 | ||
1925 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
1926 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
1927 | return -1; | |
1928 | } | |
1929 | ||
1930 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
1931 | if (err) { | |
1932 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
1933 | ifname, strerror(-err)); | |
19a26f82 MK |
1934 | if (netdev->ipv6_gateway_auto) { |
1935 | char buf[INET6_ADDRSTRLEN]; | |
72d0e1cb | 1936 | inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); |
19a26f82 MK |
1937 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); |
1938 | } | |
f8fee0e2 MK |
1939 | return -1; |
1940 | } | |
1941 | } | |
1942 | ||
cd54d859 DL |
1943 | DEBUG("'%s' has been setup", current_ifname); |
1944 | ||
0ad19a3f | 1945 | return 0; |
1946 | } | |
1947 | ||
5f4535a3 | 1948 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1949 | { |
82d5ae15 | 1950 | struct lxc_list *iterator; |
82d5ae15 | 1951 | struct lxc_netdev *netdev; |
0ad19a3f | 1952 | |
5f4535a3 | 1953 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1954 | |
5f4535a3 | 1955 | netdev = iterator->elem; |
82d5ae15 DL |
1956 | |
1957 | if (setup_netdev(netdev)) { | |
1958 | ERROR("failed to setup netdev"); | |
1959 | return -1; | |
1960 | } | |
1961 | } | |
cd54d859 | 1962 | |
5f4535a3 DL |
1963 | if (!lxc_list_empty(network)) |
1964 | INFO("network has been setup"); | |
cd54d859 DL |
1965 | |
1966 | return 0; | |
0ad19a3f | 1967 | } |
1968 | ||
7b35f3d6 SH |
1969 | void lxc_rename_phys_nics_on_shutdown(struct lxc_conf *conf) |
1970 | { | |
1971 | int i; | |
1972 | ||
1973 | INFO("running to reset %d nic names", conf->num_savednics); | |
1974 | for (i=0; i<conf->num_savednics; i++) { | |
1975 | struct saved_nic *s = &conf->saved_nics[i]; | |
1976 | INFO("resetting nic %d to %s\n", s->ifindex, s->orig_name); | |
1977 | lxc_netdev_rename_by_index(s->ifindex, s->orig_name); | |
1978 | free(s->orig_name); | |
1979 | } | |
1980 | conf->num_savednics = 0; | |
1981 | free(conf->saved_nics); | |
1982 | } | |
1983 | ||
49684c0b CS |
1984 | static int setup_private_host_hw_addr(char *veth1) |
1985 | { | |
1986 | struct ifreq ifr; | |
1987 | int err; | |
1988 | int sockfd; | |
1989 | ||
1990 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
1991 | if (sockfd < 0) | |
1992 | return -errno; | |
1993 | ||
1994 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
1995 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
1996 | if (err < 0) { | |
1997 | close(sockfd); | |
1998 | return -errno; | |
1999 | } | |
2000 | ||
2001 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2002 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
2003 | close(sockfd); | |
2004 | if (err < 0) | |
2005 | return -errno; | |
2006 | ||
7ad84da7 DL |
2007 | DEBUG("mac address of host interface '%s' changed to private " |
2008 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
2009 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
2010 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
2011 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
2012 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
2013 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
2014 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
2015 | |
2016 | return 0; | |
2017 | } | |
2018 | ||
ae9242c8 SH |
2019 | static char *default_rootfs_mount = LXCROOTFSMOUNT; |
2020 | ||
7b379ab3 | 2021 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 2022 | { |
7b379ab3 | 2023 | struct lxc_conf *new; |
26ddeedd | 2024 | int i; |
7b379ab3 MN |
2025 | |
2026 | new = malloc(sizeof(*new)); | |
2027 | if (!new) { | |
2028 | ERROR("lxc_conf_init : %m"); | |
2029 | return NULL; | |
2030 | } | |
2031 | memset(new, 0, sizeof(*new)); | |
2032 | ||
cccc74b5 | 2033 | new->personality = -1; |
596a818d DE |
2034 | new->console.log_path = NULL; |
2035 | new->console.log_fd = -1; | |
28a4b0e5 | 2036 | new->console.path = NULL; |
63376d7d DL |
2037 | new->console.peer = -1; |
2038 | new->console.master = -1; | |
2039 | new->console.slave = -1; | |
2040 | new->console.name[0] = '\0'; | |
d2e30e99 | 2041 | new->maincmd_fd = -1; |
ae9242c8 | 2042 | new->rootfs.mount = default_rootfs_mount; |
4a85ce2a | 2043 | new->loglevel = LXC_LOG_PRIORITY_NOTSET; |
7b379ab3 MN |
2044 | lxc_list_init(&new->cgroup); |
2045 | lxc_list_init(&new->network); | |
2046 | lxc_list_init(&new->mount_list); | |
81810dd1 | 2047 | lxc_list_init(&new->caps); |
26ddeedd SH |
2048 | for (i=0; i<NUM_LXC_HOOKS; i++) |
2049 | lxc_list_init(&new->hooks[i]); | |
e075f5d9 SH |
2050 | #if HAVE_APPARMOR |
2051 | new->aa_profile = NULL; | |
2052 | #endif | |
2053 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ | |
2054 | new->lsm_umount_proc = 0; | |
2055 | #endif | |
7b379ab3 MN |
2056 | |
2057 | return new; | |
089cd8b8 DL |
2058 | } |
2059 | ||
e3b4c4c4 | 2060 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2061 | { |
8634bc19 | 2062 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 2063 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 2064 | int err; |
13954cce | 2065 | |
e892973e DL |
2066 | if (netdev->priv.veth_attr.pair) |
2067 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 | 2068 | else { |
9ba8130c SH |
2069 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); |
2070 | if (err >= sizeof(veth1buf)) { /* can't *really* happen, but... */ | |
2071 | ERROR("veth1 name too long"); | |
2072 | return -1; | |
2073 | } | |
0e391e57 | 2074 | veth1 = mktemp(veth1buf); |
74a2b586 JK |
2075 | /* store away for deconf */ |
2076 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
8634bc19 | 2077 | } |
82d5ae15 | 2078 | |
0e391e57 DL |
2079 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
2080 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
2081 | |
2082 | if (!strlen(veth1) || !strlen(veth2)) { | |
2083 | ERROR("failed to allocate a temporary name"); | |
2084 | return -1; | |
0ad19a3f | 2085 | } |
2086 | ||
3cfc0f3a MN |
2087 | err = lxc_veth_create(veth1, veth2); |
2088 | if (err) { | |
2089 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
2090 | strerror(-err)); | |
6ab9ab6d | 2091 | return -1; |
0ad19a3f | 2092 | } |
13954cce | 2093 | |
49684c0b CS |
2094 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
2095 | * will always keep the host's mac address and not take the mac address | |
2096 | * of a container */ | |
2097 | err = setup_private_host_hw_addr(veth1); | |
2098 | if (err) { | |
2099 | ERROR("failed to change mac address of host interface '%s' : %s", | |
2100 | veth1, strerror(-err)); | |
2101 | goto out_delete; | |
2102 | } | |
2103 | ||
82d5ae15 | 2104 | if (netdev->mtu) { |
d472214b | 2105 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 2106 | if (!err) |
d472214b | 2107 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
2108 | if (err) { |
2109 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
2110 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 2111 | goto out_delete; |
75d09f83 DL |
2112 | } |
2113 | } | |
2114 | ||
3cfc0f3a MN |
2115 | if (netdev->link) { |
2116 | err = lxc_bridge_attach(netdev->link, veth1); | |
2117 | if (err) { | |
2118 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
2119 | veth1, netdev->link, strerror(-err)); | |
2120 | goto out_delete; | |
2121 | } | |
eb14c10a DL |
2122 | } |
2123 | ||
82d5ae15 DL |
2124 | netdev->ifindex = if_nametoindex(veth2); |
2125 | if (!netdev->ifindex) { | |
36eb9bde | 2126 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
2127 | goto out_delete; |
2128 | } | |
2129 | ||
d472214b | 2130 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
2131 | if (err) { |
2132 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
2133 | goto out_delete; | |
0ad19a3f | 2134 | } |
2135 | ||
e3b4c4c4 | 2136 | if (netdev->upscript) { |
751d9dcd DL |
2137 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2138 | "veth", veth1, (char*) NULL); | |
2139 | if (err) | |
e3b4c4c4 | 2140 | goto out_delete; |
e3b4c4c4 ST |
2141 | } |
2142 | ||
82d5ae15 DL |
2143 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
2144 | veth1, veth2, netdev->ifindex); | |
2145 | ||
6ab9ab6d | 2146 | return 0; |
eb14c10a DL |
2147 | |
2148 | out_delete: | |
b84f58b9 | 2149 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 2150 | return -1; |
13954cce | 2151 | } |
d957ae2d | 2152 | |
74a2b586 JK |
2153 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2154 | { | |
2155 | char *veth1; | |
2156 | int err; | |
2157 | ||
2158 | if (netdev->priv.veth_attr.pair) | |
2159 | veth1 = netdev->priv.veth_attr.pair; | |
2160 | else | |
2161 | veth1 = netdev->priv.veth_attr.veth1; | |
2162 | ||
2163 | if (netdev->downscript) { | |
2164 | err = run_script(handler->name, "net", netdev->downscript, | |
2165 | "down", "veth", veth1, (char*) NULL); | |
2166 | if (err) | |
2167 | return -1; | |
2168 | } | |
2169 | return 0; | |
2170 | } | |
2171 | ||
e3b4c4c4 | 2172 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2173 | { |
0e391e57 | 2174 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 2175 | int err; |
d957ae2d MT |
2176 | |
2177 | if (!netdev->link) { | |
2178 | ERROR("no link specified for macvlan netdev"); | |
2179 | return -1; | |
2180 | } | |
13954cce | 2181 | |
9ba8130c SH |
2182 | err = snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
2183 | if (err >= sizeof(peerbuf)) | |
2184 | return -1; | |
82d5ae15 | 2185 | |
0e391e57 | 2186 | peer = mktemp(peerbuf); |
82d5ae15 DL |
2187 | if (!strlen(peer)) { |
2188 | ERROR("failed to make a temporary name"); | |
2189 | return -1; | |
0ad19a3f | 2190 | } |
2191 | ||
3cfc0f3a MN |
2192 | err = lxc_macvlan_create(netdev->link, peer, |
2193 | netdev->priv.macvlan_attr.mode); | |
2194 | if (err) { | |
2195 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
2196 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 2197 | return -1; |
0ad19a3f | 2198 | } |
2199 | ||
82d5ae15 DL |
2200 | netdev->ifindex = if_nametoindex(peer); |
2201 | if (!netdev->ifindex) { | |
36eb9bde | 2202 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 2203 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 2204 | return -1; |
22ebac19 | 2205 | } |
2206 | ||
e3b4c4c4 | 2207 | if (netdev->upscript) { |
751d9dcd DL |
2208 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2209 | "macvlan", netdev->link, (char*) NULL); | |
2210 | if (err) | |
e3b4c4c4 | 2211 | return -1; |
e3b4c4c4 ST |
2212 | } |
2213 | ||
e892973e DL |
2214 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
2215 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 2216 | |
d957ae2d | 2217 | return 0; |
0ad19a3f | 2218 | } |
2219 | ||
74a2b586 JK |
2220 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2221 | { | |
2222 | int err; | |
2223 | ||
2224 | if (netdev->downscript) { | |
2225 | err = run_script(handler->name, "net", netdev->downscript, | |
2226 | "down", "macvlan", netdev->link, | |
2227 | (char*) NULL); | |
2228 | if (err) | |
2229 | return -1; | |
2230 | } | |
2231 | return 0; | |
2232 | } | |
2233 | ||
26c39028 | 2234 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 2235 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
2236 | { |
2237 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 2238 | int err; |
26c39028 JHS |
2239 | |
2240 | if (!netdev->link) { | |
2241 | ERROR("no link specified for vlan netdev"); | |
2242 | return -1; | |
2243 | } | |
2244 | ||
9ba8130c SH |
2245 | err = snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
2246 | if (err >= sizeof(peer)) { | |
2247 | ERROR("peer name too long"); | |
2248 | return -1; | |
2249 | } | |
26c39028 | 2250 | |
3cfc0f3a MN |
2251 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
2252 | if (err) { | |
2253 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
2254 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
2255 | return -1; |
2256 | } | |
2257 | ||
2258 | netdev->ifindex = if_nametoindex(peer); | |
2259 | if (!netdev->ifindex) { | |
2260 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 2261 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
2262 | return -1; |
2263 | } | |
2264 | ||
e892973e DL |
2265 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
2266 | netdev->ifindex); | |
2267 | ||
26c39028 JHS |
2268 | return 0; |
2269 | } | |
2270 | ||
74a2b586 JK |
2271 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2272 | { | |
2273 | return 0; | |
2274 | } | |
2275 | ||
e3b4c4c4 | 2276 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2277 | { |
6168e99f DL |
2278 | if (!netdev->link) { |
2279 | ERROR("no link specified for the physical interface"); | |
2280 | return -1; | |
2281 | } | |
2282 | ||
9d083402 | 2283 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 2284 | if (!netdev->ifindex) { |
9d083402 | 2285 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 2286 | return -1; |
2287 | } | |
2288 | ||
e3b4c4c4 ST |
2289 | if (netdev->upscript) { |
2290 | int err; | |
751d9dcd DL |
2291 | err = run_script(handler->name, "net", netdev->upscript, |
2292 | "up", "phys", netdev->link, (char*) NULL); | |
2293 | if (err) | |
e3b4c4c4 | 2294 | return -1; |
e3b4c4c4 ST |
2295 | } |
2296 | ||
82d5ae15 | 2297 | return 0; |
0ad19a3f | 2298 | } |
2299 | ||
74a2b586 JK |
2300 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2301 | { | |
2302 | int err; | |
2303 | ||
2304 | if (netdev->downscript) { | |
2305 | err = run_script(handler->name, "net", netdev->downscript, | |
2306 | "down", "phys", netdev->link, (char*) NULL); | |
2307 | if (err) | |
2308 | return -1; | |
2309 | } | |
2310 | return 0; | |
2311 | } | |
2312 | ||
e3b4c4c4 | 2313 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2314 | { |
82d5ae15 | 2315 | netdev->ifindex = 0; |
e3b4c4c4 ST |
2316 | if (netdev->upscript) { |
2317 | int err; | |
751d9dcd DL |
2318 | err = run_script(handler->name, "net", netdev->upscript, |
2319 | "up", "empty", (char*) NULL); | |
2320 | if (err) | |
e3b4c4c4 | 2321 | return -1; |
e3b4c4c4 | 2322 | } |
82d5ae15 | 2323 | return 0; |
0ad19a3f | 2324 | } |
2325 | ||
74a2b586 JK |
2326 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2327 | { | |
2328 | int err; | |
2329 | ||
2330 | if (netdev->downscript) { | |
2331 | err = run_script(handler->name, "net", netdev->downscript, | |
2332 | "down", "empty", (char*) NULL); | |
2333 | if (err) | |
2334 | return -1; | |
2335 | } | |
2336 | return 0; | |
2337 | } | |
2338 | ||
e3b4c4c4 | 2339 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 2340 | { |
e3b4c4c4 | 2341 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 2342 | struct lxc_list *iterator; |
82d5ae15 | 2343 | struct lxc_netdev *netdev; |
0ad19a3f | 2344 | |
5f4535a3 | 2345 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 2346 | |
5f4535a3 | 2347 | netdev = iterator->elem; |
13954cce | 2348 | |
24654103 | 2349 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 2350 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 2351 | netdev->type); |
82d5ae15 DL |
2352 | return -1; |
2353 | } | |
0ad19a3f | 2354 | |
e3b4c4c4 | 2355 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
2356 | ERROR("failed to create netdev"); |
2357 | return -1; | |
2358 | } | |
e3b4c4c4 | 2359 | |
0ad19a3f | 2360 | } |
2361 | ||
2362 | return 0; | |
2363 | } | |
2364 | ||
74a2b586 | 2365 | void lxc_delete_network(struct lxc_handler *handler) |
7fef7a06 | 2366 | { |
74a2b586 | 2367 | struct lxc_list *network = &handler->conf->network; |
7fef7a06 DL |
2368 | struct lxc_list *iterator; |
2369 | struct lxc_netdev *netdev; | |
2370 | ||
2371 | lxc_list_for_each(iterator, network) { | |
2372 | netdev = iterator->elem; | |
d472214b | 2373 | |
74a2b586 | 2374 | if (netdev->ifindex != 0 && netdev->type == LXC_NET_PHYS) { |
d8f8e352 DL |
2375 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) |
2376 | WARN("failed to rename to the initial name the " \ | |
2377 | "netdev '%s'", netdev->link); | |
d472214b | 2378 | continue; |
d8f8e352 | 2379 | } |
d472214b | 2380 | |
74a2b586 JK |
2381 | if (netdev_deconf[netdev->type](handler, netdev)) { |
2382 | WARN("failed to destroy netdev"); | |
2383 | } | |
2384 | ||
d8f8e352 DL |
2385 | /* Recent kernel remove the virtual interfaces when the network |
2386 | * namespace is destroyed but in case we did not moved the | |
2387 | * interface to the network namespace, we have to destroy it | |
2388 | */ | |
74a2b586 JK |
2389 | if (netdev->ifindex != 0 && |
2390 | lxc_netdev_delete_by_index(netdev->ifindex)) | |
d8f8e352 | 2391 | WARN("failed to remove interface '%s'", netdev->name); |
7fef7a06 DL |
2392 | } |
2393 | } | |
2394 | ||
5f4535a3 | 2395 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 2396 | { |
82d5ae15 | 2397 | struct lxc_list *iterator; |
82d5ae15 | 2398 | struct lxc_netdev *netdev; |
3cfc0f3a | 2399 | int err; |
0ad19a3f | 2400 | |
5f4535a3 | 2401 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 2402 | |
5f4535a3 | 2403 | netdev = iterator->elem; |
82d5ae15 | 2404 | |
236087a6 DL |
2405 | /* empty network namespace, nothing to move */ |
2406 | if (!netdev->ifindex) | |
2407 | continue; | |
2408 | ||
d472214b | 2409 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
2410 | if (err) { |
2411 | ERROR("failed to move '%s' to the container : %s", | |
2412 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
2413 | return -1; |
2414 | } | |
2415 | ||
c1c75c04 | 2416 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 2417 | } |
2418 | ||
2419 | return 0; | |
2420 | } | |
2421 | ||
19a26f82 MK |
2422 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
2423 | { | |
2424 | struct lxc_list *network = &handler->conf->network; | |
2425 | struct lxc_list *iterator; | |
2426 | struct lxc_netdev *netdev; | |
2427 | int link_index; | |
2428 | ||
2429 | lxc_list_for_each(iterator, network) { | |
2430 | netdev = iterator->elem; | |
2431 | ||
2432 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2433 | continue; | |
2434 | ||
2435 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
2436 | ERROR("gateway = auto only supported for " | |
2437 | "veth and macvlan"); | |
2438 | return -1; | |
2439 | } | |
2440 | ||
2441 | if (!netdev->link) { | |
2442 | ERROR("gateway = auto needs a link interface"); | |
2443 | return -1; | |
2444 | } | |
2445 | ||
2446 | link_index = if_nametoindex(netdev->link); | |
2447 | if (!link_index) | |
2448 | return -EINVAL; | |
2449 | ||
2450 | if (netdev->ipv4_gateway_auto) { | |
2451 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
2452 | ERROR("failed to automatically find ipv4 gateway " | |
2453 | "address from link interface '%s'", netdev->link); | |
2454 | return -1; | |
2455 | } | |
2456 | } | |
2457 | ||
2458 | if (netdev->ipv6_gateway_auto) { | |
2459 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
2460 | ERROR("failed to automatically find ipv6 gateway " | |
2461 | "address from link interface '%s'", netdev->link); | |
2462 | return -1; | |
2463 | } | |
2464 | } | |
2465 | } | |
2466 | ||
2467 | return 0; | |
2468 | } | |
2469 | ||
5e4a62bf | 2470 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 2471 | { |
5e4a62bf | 2472 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 2473 | int i; |
b0a33c1e | 2474 | |
5e4a62bf DL |
2475 | /* no tty in the configuration */ |
2476 | if (!conf->tty) | |
b0a33c1e | 2477 | return 0; |
2478 | ||
13954cce | 2479 | tty_info->pty_info = |
e4e7d59d | 2480 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 2481 | if (!tty_info->pty_info) { |
36eb9bde | 2482 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 2483 | return -1; |
b0a33c1e | 2484 | } |
2485 | ||
985d15b1 | 2486 | for (i = 0; i < conf->tty; i++) { |
13954cce | 2487 | |
b0a33c1e | 2488 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
2489 | ||
13954cce | 2490 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 2491 | pty_info->name, NULL, NULL)) { |
36eb9bde | 2492 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
2493 | tty_info->nbtty = i; |
2494 | lxc_delete_tty(tty_info); | |
2495 | return -1; | |
b0a33c1e | 2496 | } |
2497 | ||
5332bb84 DL |
2498 | DEBUG("allocated pty '%s' (%d/%d)", |
2499 | pty_info->name, pty_info->master, pty_info->slave); | |
2500 | ||
b035ad62 MS |
2501 | /* Prevent leaking the file descriptors to the container */ |
2502 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
2503 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
2504 | ||
b0a33c1e | 2505 | pty_info->busy = 0; |
2506 | } | |
2507 | ||
985d15b1 | 2508 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
2509 | |
2510 | INFO("tty's configured"); | |
2511 | ||
985d15b1 | 2512 | return 0; |
b0a33c1e | 2513 | } |
2514 | ||
2515 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
2516 | { | |
2517 | int i; | |
2518 | ||
2519 | for (i = 0; i < tty_info->nbtty; i++) { | |
2520 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
2521 | ||
2522 | close(pty_info->master); | |
2523 | close(pty_info->slave); | |
2524 | } | |
2525 | ||
2526 | free(tty_info->pty_info); | |
2527 | tty_info->nbtty = 0; | |
2528 | } | |
2529 | ||
571e6ec8 | 2530 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 2531 | { |
e075f5d9 SH |
2532 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
2533 | int mounted; | |
2534 | #endif | |
2535 | ||
571e6ec8 | 2536 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 2537 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 2538 | return -1; |
0ad19a3f | 2539 | } |
2540 | ||
5f4535a3 | 2541 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 2542 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 2543 | return -1; |
0ad19a3f | 2544 | } |
2545 | ||
89eaa05e SH |
2546 | if (run_lxc_hooks(name, "pre-mount", lxc_conf)) { |
2547 | ERROR("failed to run pre-mount hooks for container '%s'.", name); | |
2548 | return -1; | |
2549 | } | |
5ea6163a | 2550 | |
cc28d0b0 | 2551 | if (setup_rootfs(lxc_conf)) { |
ac778708 | 2552 | ERROR("failed to setup rootfs for '%s'", name); |
95b5ffaf | 2553 | return -1; |
0ad19a3f | 2554 | } |
2555 | ||
c6883f38 | 2556 | if (lxc_conf->autodev) { |
91c3830e SH |
2557 | if (mount_autodev(lxc_conf->rootfs.mount)) { |
2558 | ERROR("failed to mount /dev in the container"); | |
c6883f38 SH |
2559 | return -1; |
2560 | } | |
2561 | } | |
2562 | ||
80a881b2 | 2563 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab, name)) { |
36eb9bde | 2564 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2565 | return -1; |
576f946d | 2566 | } |
2567 | ||
80a881b2 | 2568 | if (setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list, name)) { |
e7938e9e MN |
2569 | ERROR("failed to setup the mount entries for '%s'", name); |
2570 | return -1; | |
2571 | } | |
2572 | ||
773fb9ca SH |
2573 | if (run_lxc_hooks(name, "mount", lxc_conf)) { |
2574 | ERROR("failed to run mount hooks for container '%s'.", name); | |
2575 | return -1; | |
2576 | } | |
2577 | ||
91c3830e SH |
2578 | if (lxc_conf->autodev) { |
2579 | if (setup_autodev(lxc_conf->rootfs.mount)) { | |
2580 | ERROR("failed to populate /dev in the container"); | |
2581 | return -1; | |
2582 | } | |
2583 | } | |
2584 | ||
ac778708 DL |
2585 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
2586 | ERROR("failed to setup the cgroups for '%s'", name); | |
2587 | return -1; | |
2588 | } | |
2589 | ||
7c6ef2a2 | 2590 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2591 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2592 | return -1; |
6e590161 | 2593 | } |
2594 | ||
f62b3449 | 2595 | if (setup_kmsg(&lxc_conf->rootfs, &lxc_conf->console)) // don't fail |
1bd051a6 | 2596 | ERROR("failed to setup kmsg for '%s'", name); |
1bd051a6 | 2597 | |
7c6ef2a2 | 2598 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2599 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2600 | return -1; |
b0a33c1e | 2601 | } |
2602 | ||
e075f5d9 | 2603 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
9ac3ffb5 SG |
2604 | INFO("rootfs path is .%s., mount is .%s.", lxc_conf->rootfs.path, |
2605 | lxc_conf->rootfs.mount); | |
2606 | if (lxc_conf->rootfs.path == NULL || strlen(lxc_conf->rootfs.path) == 0) | |
2607 | mounted = 0; | |
2608 | else | |
2609 | mounted = lsm_mount_proc_if_needed(lxc_conf->rootfs.path, lxc_conf->rootfs.mount); | |
e075f5d9 SH |
2610 | if (mounted == -1) { |
2611 | SYSERROR("failed to mount /proc in the container."); | |
2612 | return -1; | |
2613 | } else if (mounted == 1) { | |
2614 | lxc_conf->lsm_umount_proc = 1; | |
2615 | } | |
2616 | #endif | |
2617 | ||
ac778708 | 2618 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2619 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2620 | return -1; |
ed502555 | 2621 | } |
2622 | ||
571e6ec8 | 2623 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2624 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2625 | return -1; |
3c26f34e | 2626 | } |
2627 | ||
cccc74b5 DL |
2628 | if (setup_personality(lxc_conf->personality)) { |
2629 | ERROR("failed to setup personality"); | |
2630 | return -1; | |
2631 | } | |
2632 | ||
81810dd1 DL |
2633 | if (setup_caps(&lxc_conf->caps)) { |
2634 | ERROR("failed to drop capabilities"); | |
2635 | return -1; | |
2636 | } | |
2637 | ||
cd54d859 DL |
2638 | NOTICE("'%s' is setup.", name); |
2639 | ||
0ad19a3f | 2640 | return 0; |
2641 | } | |
26ddeedd SH |
2642 | |
2643 | int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf) | |
2644 | { | |
2645 | int which = -1; | |
2646 | struct lxc_list *it; | |
2647 | ||
2648 | if (strcmp(hook, "pre-start") == 0) | |
2649 | which = LXCHOOK_PRESTART; | |
5ea6163a SH |
2650 | else if (strcmp(hook, "pre-mount") == 0) |
2651 | which = LXCHOOK_PREMOUNT; | |
26ddeedd SH |
2652 | else if (strcmp(hook, "mount") == 0) |
2653 | which = LXCHOOK_MOUNT; | |
2654 | else if (strcmp(hook, "start") == 0) | |
2655 | which = LXCHOOK_START; | |
2656 | else if (strcmp(hook, "post-stop") == 0) | |
2657 | which = LXCHOOK_POSTSTOP; | |
2658 | else | |
2659 | return -1; | |
2660 | lxc_list_for_each(it, &conf->hooks[which]) { | |
2661 | int ret; | |
2662 | char *hookname = it->elem; | |
2663 | ret = run_script(name, "lxc", hookname, hook, NULL); | |
2664 | if (ret) | |
2665 | return ret; | |
2666 | } | |
2667 | return 0; | |
2668 | } | |
72d0e1cb | 2669 | |
427b3a21 | 2670 | static void lxc_remove_nic(struct lxc_list *it) |
72d0e1cb SG |
2671 | { |
2672 | struct lxc_netdev *netdev = it->elem; | |
9ebb03ad | 2673 | struct lxc_list *it2,*next; |
72d0e1cb SG |
2674 | |
2675 | lxc_list_del(it); | |
2676 | ||
2677 | if (netdev->link) | |
2678 | free(netdev->link); | |
2679 | if (netdev->name) | |
2680 | free(netdev->name); | |
2681 | if (netdev->upscript) | |
2682 | free(netdev->upscript); | |
2683 | if (netdev->hwaddr) | |
2684 | free(netdev->hwaddr); | |
2685 | if (netdev->mtu) | |
2686 | free(netdev->mtu); | |
2687 | if (netdev->ipv4_gateway) | |
2688 | free(netdev->ipv4_gateway); | |
2689 | if (netdev->ipv6_gateway) | |
2690 | free(netdev->ipv6_gateway); | |
9ebb03ad | 2691 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { |
72d0e1cb SG |
2692 | lxc_list_del(it2); |
2693 | free(it2->elem); | |
2694 | free(it2); | |
2695 | } | |
9ebb03ad | 2696 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { |
72d0e1cb SG |
2697 | lxc_list_del(it2); |
2698 | free(it2->elem); | |
2699 | free(it2); | |
2700 | } | |
d95db067 | 2701 | free(netdev); |
72d0e1cb SG |
2702 | free(it); |
2703 | } | |
2704 | ||
2705 | /* we get passed in something like '0', '0.ipv4' or '1.ipv6' */ | |
12a50cc6 | 2706 | int lxc_clear_nic(struct lxc_conf *c, const char *key) |
72d0e1cb SG |
2707 | { |
2708 | char *p1; | |
2709 | int ret, idx, i; | |
2710 | struct lxc_list *it; | |
2711 | struct lxc_netdev *netdev; | |
2712 | ||
2713 | p1 = index(key, '.'); | |
2714 | if (!p1 || *(p1+1) == '\0') | |
2715 | p1 = NULL; | |
2716 | ||
2717 | ret = sscanf(key, "%d", &idx); | |
2718 | if (ret != 1) return -1; | |
2719 | if (idx < 0) | |
2720 | return -1; | |
2721 | ||
2722 | i = 0; | |
2723 | lxc_list_for_each(it, &c->network) { | |
2724 | if (i == idx) | |
2725 | break; | |
2726 | i++; | |
2727 | } | |
2728 | if (i < idx) // we don't have that many nics defined | |
2729 | return -1; | |
2730 | ||
2731 | if (!it || !it->elem) | |
2732 | return -1; | |
2733 | ||
2734 | netdev = it->elem; | |
2735 | ||
2736 | if (!p1) { | |
2737 | lxc_remove_nic(it); | |
2738 | } else if (strcmp(p1, "ipv4") == 0) { | |
9ebb03ad DE |
2739 | struct lxc_list *it2,*next; |
2740 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { | |
72d0e1cb SG |
2741 | lxc_list_del(it2); |
2742 | free(it2->elem); | |
2743 | free(it2); | |
2744 | } | |
2745 | } else if (strcmp(p1, "ipv6") == 0) { | |
9ebb03ad DE |
2746 | struct lxc_list *it2,*next; |
2747 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { | |
72d0e1cb SG |
2748 | lxc_list_del(it2); |
2749 | free(it2->elem); | |
2750 | free(it2); | |
2751 | } | |
2752 | } else if (strcmp(p1, "link") == 0) { | |
2753 | if (netdev->link) { | |
2754 | free(netdev->link); | |
2755 | netdev->link = NULL; | |
2756 | } | |
2757 | } else if (strcmp(p1, "name") == 0) { | |
2758 | if (netdev->name) { | |
2759 | free(netdev->name); | |
2760 | netdev->name = NULL; | |
2761 | } | |
2762 | } else if (strcmp(p1, "script.up") == 0) { | |
2763 | if (netdev->upscript) { | |
2764 | free(netdev->upscript); | |
2765 | netdev->upscript = NULL; | |
2766 | } | |
2767 | } else if (strcmp(p1, "hwaddr") == 0) { | |
2768 | if (netdev->hwaddr) { | |
2769 | free(netdev->hwaddr); | |
2770 | netdev->hwaddr = NULL; | |
2771 | } | |
2772 | } else if (strcmp(p1, "mtu") == 0) { | |
2773 | if (netdev->mtu) { | |
2774 | free(netdev->mtu); | |
2775 | netdev->mtu = NULL; | |
2776 | } | |
2777 | } else if (strcmp(p1, "ipv4_gateway") == 0) { | |
2778 | if (netdev->ipv4_gateway) { | |
2779 | free(netdev->ipv4_gateway); | |
2780 | netdev->ipv4_gateway = NULL; | |
2781 | } | |
2782 | } else if (strcmp(p1, "ipv6_gateway") == 0) { | |
2783 | if (netdev->ipv6_gateway) { | |
2784 | free(netdev->ipv6_gateway); | |
2785 | netdev->ipv6_gateway = NULL; | |
2786 | } | |
2787 | } | |
2788 | else return -1; | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | ||
2793 | int lxc_clear_config_network(struct lxc_conf *c) | |
2794 | { | |
9ebb03ad DE |
2795 | struct lxc_list *it,*next; |
2796 | lxc_list_for_each_safe(it, &c->network, next) { | |
72d0e1cb SG |
2797 | lxc_remove_nic(it); |
2798 | } | |
2799 | return 0; | |
2800 | } | |
2801 | ||
2802 | int lxc_clear_config_caps(struct lxc_conf *c) | |
2803 | { | |
9ebb03ad | 2804 | struct lxc_list *it,*next; |
72d0e1cb | 2805 | |
9ebb03ad | 2806 | lxc_list_for_each_safe(it, &c->caps, next) { |
72d0e1cb SG |
2807 | lxc_list_del(it); |
2808 | free(it->elem); | |
2809 | free(it); | |
2810 | } | |
2811 | return 0; | |
2812 | } | |
2813 | ||
12a50cc6 | 2814 | int lxc_clear_cgroups(struct lxc_conf *c, const char *key) |
72d0e1cb | 2815 | { |
9ebb03ad | 2816 | struct lxc_list *it,*next; |
72d0e1cb | 2817 | bool all = false; |
12a50cc6 | 2818 | const char *k = key + 11; |
72d0e1cb SG |
2819 | |
2820 | if (strcmp(key, "lxc.cgroup") == 0) | |
2821 | all = true; | |
2822 | ||
9ebb03ad | 2823 | lxc_list_for_each_safe(it, &c->cgroup, next) { |
72d0e1cb SG |
2824 | struct lxc_cgroup *cg = it->elem; |
2825 | if (!all && strcmp(cg->subsystem, k) != 0) | |
2826 | continue; | |
2827 | lxc_list_del(it); | |
2828 | free(cg->subsystem); | |
2829 | free(cg->value); | |
2830 | free(cg); | |
2831 | free(it); | |
2832 | } | |
2833 | return 0; | |
2834 | } | |
2835 | ||
2836 | int lxc_clear_mount_entries(struct lxc_conf *c) | |
2837 | { | |
9ebb03ad | 2838 | struct lxc_list *it,*next; |
72d0e1cb | 2839 | |
9ebb03ad | 2840 | lxc_list_for_each_safe(it, &c->mount_list, next) { |
72d0e1cb SG |
2841 | lxc_list_del(it); |
2842 | free(it->elem); | |
2843 | free(it); | |
2844 | } | |
2845 | return 0; | |
2846 | } | |
2847 | ||
12a50cc6 | 2848 | int lxc_clear_hooks(struct lxc_conf *c, const char *key) |
72d0e1cb | 2849 | { |
9ebb03ad | 2850 | struct lxc_list *it,*next; |
17ed13a3 | 2851 | bool all = false, done = false; |
12a50cc6 | 2852 | const char *k = key + 9; |
72d0e1cb SG |
2853 | int i; |
2854 | ||
17ed13a3 SH |
2855 | if (strcmp(key, "lxc.hook") == 0) |
2856 | all = true; | |
2857 | ||
72d0e1cb | 2858 | for (i=0; i<NUM_LXC_HOOKS; i++) { |
17ed13a3 | 2859 | if (all || strcmp(k, lxchook_names[i]) == 0) { |
9ebb03ad | 2860 | lxc_list_for_each_safe(it, &c->hooks[i], next) { |
17ed13a3 SH |
2861 | lxc_list_del(it); |
2862 | free(it->elem); | |
2863 | free(it); | |
2864 | } | |
2865 | done = true; | |
72d0e1cb SG |
2866 | } |
2867 | } | |
17ed13a3 SH |
2868 | |
2869 | if (!done) { | |
2870 | ERROR("Invalid hook key: %s", key); | |
2871 | return -1; | |
2872 | } | |
72d0e1cb SG |
2873 | return 0; |
2874 | } | |
8eb5694b | 2875 | |
7b35f3d6 SH |
2876 | void lxc_clear_saved_nics(struct lxc_conf *conf) |
2877 | { | |
2878 | int i; | |
2879 | ||
2880 | if (!conf->num_savednics) | |
2881 | return; | |
2882 | for (i=0; i < conf->num_savednics; i++) | |
2883 | free(conf->saved_nics[i].orig_name); | |
2884 | conf->saved_nics = 0; | |
2885 | free(conf->saved_nics); | |
2886 | } | |
2887 | ||
8eb5694b SH |
2888 | void lxc_conf_free(struct lxc_conf *conf) |
2889 | { | |
2890 | if (!conf) | |
2891 | return; | |
2892 | if (conf->console.path) | |
2893 | free(conf->console.path); | |
ae9242c8 | 2894 | if (conf->rootfs.mount != default_rootfs_mount) |
8eb5694b | 2895 | free(conf->rootfs.mount); |
d95db067 DE |
2896 | if (conf->rootfs.path) |
2897 | free(conf->rootfs.path); | |
2898 | if (conf->utsname) | |
2899 | free(conf->utsname); | |
2900 | if (conf->ttydir) | |
2901 | free(conf->ttydir); | |
2902 | if (conf->fstab) | |
2903 | free(conf->fstab); | |
4a85ce2a SH |
2904 | if (conf->logfile) |
2905 | free(conf->logfile); | |
8eb5694b | 2906 | lxc_clear_config_network(conf); |
1f530df6 | 2907 | #if HAVE_APPARMOR |
8eb5694b SH |
2908 | if (conf->aa_profile) |
2909 | free(conf->aa_profile); | |
1f530df6 | 2910 | #endif |
769872f9 | 2911 | lxc_seccomp_free(conf); |
8eb5694b SH |
2912 | lxc_clear_config_caps(conf); |
2913 | lxc_clear_cgroups(conf, "lxc.cgroup"); | |
17ed13a3 | 2914 | lxc_clear_hooks(conf, "lxc.hook"); |
8eb5694b | 2915 | lxc_clear_mount_entries(conf); |
7b35f3d6 | 2916 | lxc_clear_saved_nics(conf); |
8eb5694b SH |
2917 | free(conf); |
2918 | } |