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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> | |
27 | #include <errno.h> | |
28 | #include <string.h> | |
29 | #include <dirent.h> | |
30 | #include <mntent.h> | |
31 | #include <unistd.h> | |
b0a33c1e | 32 | #include <pty.h> |
0ad19a3f | 33 | |
34 | #include <sys/types.h> | |
35 | #include <sys/utsname.h> | |
36 | #include <sys/param.h> | |
37 | #include <sys/stat.h> | |
38 | #include <sys/socket.h> | |
39 | #include <sys/mount.h> | |
40 | #include <sys/mman.h> | |
81810dd1 DL |
41 | #include <sys/prctl.h> |
42 | #include <sys/capability.h> | |
0ad19a3f | 43 | |
44 | #include <arpa/inet.h> | |
45 | #include <fcntl.h> | |
46 | #include <netinet/in.h> | |
47 | #include <net/if.h> | |
6f4a3756 | 48 | #include <libgen.h> |
0ad19a3f | 49 | |
e5bda9ee | 50 | #include "network.h" |
51 | #include "error.h" | |
b2718c72 | 52 | #include "parse.h" |
881450bb | 53 | #include "config.h" |
1b09f2c0 DL |
54 | #include "utils.h" |
55 | #include "conf.h" | |
56 | #include "log.h" | |
57 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
36eb9bde CLG |
58 | |
59 | lxc_log_define(lxc_conf, lxc); | |
e5bda9ee | 60 | |
0ad19a3f | 61 | #define MAXHWLEN 18 |
62 | #define MAXINDEXLEN 20 | |
442cbbe6 | 63 | #define MAXMTULEN 16 |
0ad19a3f | 64 | #define MAXLINELEN 128 |
65 | ||
fdc03323 DL |
66 | #ifndef MS_REC |
67 | #define MS_REC 16384 | |
68 | #endif | |
69 | ||
c08556c6 DL |
70 | #ifndef MNT_DETACH |
71 | #define MNT_DETACH 2 | |
72 | #endif | |
73 | ||
b09094da MN |
74 | #ifndef CAP_SETFCAP |
75 | #define CAP_SETFCAP 31 | |
76 | #endif | |
77 | ||
78 | #ifndef CAP_MAC_OVERRIDE | |
79 | #define CAP_MAC_OVERRIDE 32 | |
80 | #endif | |
81 | ||
82 | #ifndef CAP_MAC_ADMIN | |
83 | #define CAP_MAC_ADMIN 33 | |
84 | #endif | |
85 | ||
86 | #ifndef PR_CAPBSET_DROP | |
87 | #define PR_CAPBSET_DROP 24 | |
88 | #endif | |
89 | ||
bf601689 MH |
90 | extern int pivot_root(const char * new_root, const char * put_old); |
91 | ||
82d5ae15 | 92 | typedef int (*instanciate_cb)(struct lxc_netdev *); |
0ad19a3f | 93 | |
998ac676 RT |
94 | struct mount_opt { |
95 | char *name; | |
96 | int clear; | |
97 | int flag; | |
98 | }; | |
99 | ||
81810dd1 DL |
100 | struct caps_opt { |
101 | char *name; | |
102 | int value; | |
103 | }; | |
104 | ||
82d5ae15 DL |
105 | static int instanciate_veth(struct lxc_netdev *); |
106 | static int instanciate_macvlan(struct lxc_netdev *); | |
26c39028 | 107 | static int instanciate_vlan(struct lxc_netdev *); |
82d5ae15 DL |
108 | static int instanciate_phys(struct lxc_netdev *); |
109 | static int instanciate_empty(struct lxc_netdev *); | |
110 | ||
24654103 DL |
111 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
112 | [LXC_NET_VETH] = instanciate_veth, | |
113 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
114 | [LXC_NET_VLAN] = instanciate_vlan, | |
115 | [LXC_NET_PHYS] = instanciate_phys, | |
116 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 117 | }; |
118 | ||
998ac676 RT |
119 | static struct mount_opt mount_opt[] = { |
120 | { "defaults", 0, 0 }, | |
121 | { "ro", 0, MS_RDONLY }, | |
122 | { "rw", 1, MS_RDONLY }, | |
123 | { "suid", 1, MS_NOSUID }, | |
124 | { "nosuid", 0, MS_NOSUID }, | |
125 | { "dev", 1, MS_NODEV }, | |
126 | { "nodev", 0, MS_NODEV }, | |
127 | { "exec", 1, MS_NOEXEC }, | |
128 | { "noexec", 0, MS_NOEXEC }, | |
129 | { "sync", 0, MS_SYNCHRONOUS }, | |
130 | { "async", 1, MS_SYNCHRONOUS }, | |
131 | { "remount", 0, MS_REMOUNT }, | |
132 | { "mand", 0, MS_MANDLOCK }, | |
133 | { "nomand", 1, MS_MANDLOCK }, | |
134 | { "atime", 1, MS_NOATIME }, | |
135 | { "noatime", 0, MS_NOATIME }, | |
136 | { "diratime", 1, MS_NODIRATIME }, | |
137 | { "nodiratime", 0, MS_NODIRATIME }, | |
138 | { "bind", 0, MS_BIND }, | |
139 | { "rbind", 0, MS_BIND|MS_REC }, | |
140 | { NULL, 0, 0 }, | |
141 | }; | |
142 | ||
81810dd1 | 143 | static struct caps_opt caps_opt[] = { |
1e11be34 DL |
144 | { "chown", CAP_CHOWN }, |
145 | { "dac_override", CAP_DAC_OVERRIDE }, | |
146 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
147 | { "fowner", CAP_FOWNER }, | |
148 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
149 | { "kill", CAP_KILL }, |
150 | { "setgid", CAP_SETGID }, | |
151 | { "setuid", CAP_SETUID }, | |
152 | { "setpcap", CAP_SETPCAP }, | |
153 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
154 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
155 | { "net_broadcast", CAP_NET_BROADCAST }, | |
156 | { "net_admin", CAP_NET_ADMIN }, | |
157 | { "net_raw", CAP_NET_RAW }, | |
158 | { "ipc_lock", CAP_IPC_LOCK }, | |
159 | { "ipc_owner", CAP_IPC_OWNER }, | |
160 | { "sys_module", CAP_SYS_MODULE }, | |
161 | { "sys_rawio", CAP_SYS_RAWIO }, | |
162 | { "sys_chroot", CAP_SYS_CHROOT }, | |
163 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
164 | { "sys_pacct", CAP_SYS_PACCT }, | |
165 | { "sys_admin", CAP_SYS_ADMIN }, | |
166 | { "sys_boot", CAP_SYS_BOOT }, | |
167 | { "sys_nice", CAP_SYS_NICE }, | |
168 | { "sys_resource", CAP_SYS_RESOURCE }, | |
169 | { "sys_time", CAP_SYS_TIME }, | |
170 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
171 | { "mknod", CAP_MKNOD }, | |
172 | { "lease", CAP_LEASE }, | |
173 | { "audit_write", CAP_AUDIT_WRITE }, | |
174 | { "audit_control", CAP_AUDIT_CONTROL }, | |
175 | { "setfcap", CAP_SETFCAP }, | |
176 | { "mac_override", CAP_MAC_OVERRIDE }, | |
177 | { "mac_admin", CAP_MAC_ADMIN }, | |
81810dd1 DL |
178 | }; |
179 | ||
180 | ||
7a7ff0c6 | 181 | static int configure_find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 182 | { |
183 | struct cbarg { | |
184 | const char *rootfs; | |
185 | const char *testdir; | |
186 | char *fstype; | |
187 | int mntopt; | |
188 | } *cbarg = data; | |
189 | ||
190 | char *fstype; | |
191 | ||
192 | /* we don't try 'nodev' entries */ | |
193 | if (strstr(buffer, "nodev")) | |
194 | return 0; | |
195 | ||
196 | fstype = buffer; | |
b2718c72 | 197 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
198 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 199 | |
200 | if (mount(cbarg->rootfs, cbarg->testdir, fstype, cbarg->mntopt, NULL)) | |
201 | return 0; | |
202 | ||
203 | /* found ! */ | |
204 | umount(cbarg->testdir); | |
205 | strcpy(cbarg->fstype, fstype); | |
206 | ||
207 | return 1; | |
208 | } | |
209 | ||
210 | /* find the filesystem type with brute force */ | |
211 | static int configure_find_fstype(const char *rootfs, char *fstype, int mntopt) | |
212 | { | |
213 | int i, found; | |
78ae2fcc | 214 | |
215 | struct cbarg { | |
216 | const char *rootfs; | |
217 | const char *testdir; | |
218 | char *fstype; | |
219 | int mntopt; | |
220 | } cbarg = { | |
221 | .rootfs = rootfs, | |
222 | .fstype = fstype, | |
223 | .mntopt = mntopt, | |
224 | }; | |
225 | ||
226 | /* first we check with /etc/filesystems, in case the modules | |
227 | * are auto-loaded and fall back to the supported kernel fs | |
228 | */ | |
229 | char *fsfile[] = { | |
230 | "/etc/filesystems", | |
231 | "/proc/filesystems", | |
232 | }; | |
233 | ||
234 | cbarg.testdir = tempnam("/tmp", "lxc-"); | |
235 | if (!cbarg.testdir) { | |
36eb9bde | 236 | SYSERROR("failed to build a temp name"); |
78ae2fcc | 237 | return -1; |
238 | } | |
239 | ||
240 | if (mkdir(cbarg.testdir, 0755)) { | |
36eb9bde | 241 | SYSERROR("failed to create temporary directory"); |
78ae2fcc | 242 | return -1; |
243 | } | |
244 | ||
245 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { | |
246 | ||
b2718c72 | 247 | found = lxc_file_for_each_line(fsfile[i], |
248 | configure_find_fstype_cb, | |
2382ecff | 249 | &cbarg); |
78ae2fcc | 250 | |
251 | if (found < 0) { | |
36eb9bde | 252 | SYSERROR("failed to read '%s'", fsfile[i]); |
78ae2fcc | 253 | goto out; |
254 | } | |
255 | ||
256 | if (found) | |
257 | break; | |
258 | } | |
259 | ||
260 | if (!found) { | |
36eb9bde | 261 | ERROR("failed to determine fs type for '%s'", rootfs); |
78ae2fcc | 262 | goto out; |
263 | } | |
264 | ||
265 | out: | |
266 | rmdir(cbarg.testdir); | |
267 | return found - 1; | |
268 | } | |
269 | ||
270 | static int configure_rootfs_dir_cb(const char *rootfs, const char *absrootfs, | |
271 | FILE *f) | |
272 | { | |
fdc03323 | 273 | return fprintf(f, "%s %s none rbind 0 0\n", absrootfs, rootfs); |
78ae2fcc | 274 | } |
275 | ||
276 | static int configure_rootfs_blk_cb(const char *rootfs, const char *absrootfs, | |
277 | FILE *f) | |
278 | { | |
279 | char fstype[MAXPATHLEN]; | |
280 | ||
281 | if (configure_find_fstype(absrootfs, fstype, 0)) { | |
36eb9bde | 282 | ERROR("failed to configure mount for block device '%s'", |
78ae2fcc | 283 | absrootfs); |
284 | return -1; | |
285 | } | |
286 | ||
287 | return fprintf(f, "%s %s %s defaults 0 0\n", absrootfs, rootfs, fstype); | |
288 | } | |
289 | ||
eae6543d | 290 | static int configure_rootfs(const char *name, const char *rootfs) |
0ad19a3f | 291 | { |
292 | char path[MAXPATHLEN]; | |
b09ef133 | 293 | char absrootfs[MAXPATHLEN]; |
9b0f0477 | 294 | char fstab[MAXPATHLEN]; |
78ae2fcc | 295 | struct stat s; |
9b0f0477 | 296 | FILE *f; |
78ae2fcc | 297 | int i, ret; |
298 | ||
299 | typedef int (*rootfs_cb)(const char *, const char *, FILE *); | |
300 | ||
301 | struct rootfs_type { | |
302 | int type; | |
303 | rootfs_cb cb; | |
304 | } rtfs_type[] = { | |
305 | { __S_IFDIR, configure_rootfs_dir_cb }, | |
306 | { __S_IFBLK, configure_rootfs_blk_cb }, | |
307 | }; | |
0ad19a3f | 308 | |
4c8ab83b | 309 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 310 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 311 | return -1; |
312 | } | |
b09ef133 | 313 | |
4c8ab83b | 314 | snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs", name); |
b09ef133 | 315 | |
78ae2fcc | 316 | if (mkdir(path, 0755)) { |
36eb9bde | 317 | SYSERROR("failed to create the '%s' directory", path); |
78ae2fcc | 318 | return -1; |
319 | } | |
320 | ||
b09ef133 | 321 | if (access(absrootfs, F_OK)) { |
36eb9bde | 322 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 323 | return -1; |
324 | } | |
325 | ||
78ae2fcc | 326 | if (stat(absrootfs, &s)) { |
36eb9bde | 327 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 328 | return -1; |
329 | } | |
330 | ||
78ae2fcc | 331 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 332 | |
78ae2fcc | 333 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
334 | continue; | |
9b0f0477 | 335 | |
78ae2fcc | 336 | snprintf(fstab, MAXPATHLEN, LXCPATH "/%s/fstab", name); |
4c8ab83b | 337 | |
78ae2fcc | 338 | f = fopen(fstab, "a+"); |
339 | if (!f) { | |
36eb9bde | 340 | SYSERROR("failed to open fstab file"); |
78ae2fcc | 341 | return -1; |
342 | } | |
9b0f0477 | 343 | |
78ae2fcc | 344 | ret = rtfs_type[i].cb(path, absrootfs, f); |
9b0f0477 | 345 | |
78ae2fcc | 346 | fclose(f); |
347 | ||
348 | if (ret < 0) { | |
36eb9bde | 349 | ERROR("failed to add rootfs mount in fstab"); |
78ae2fcc | 350 | return -1; |
351 | } | |
352 | ||
353 | snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs/rootfs", name); | |
354 | ||
355 | return symlink(absrootfs, path); | |
356 | } | |
9b0f0477 | 357 | |
36eb9bde | 358 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 359 | return -1; |
0ad19a3f | 360 | } |
361 | ||
4e5440c6 | 362 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 363 | { |
4e5440c6 DL |
364 | if (!utsname) |
365 | return 0; | |
0ad19a3f | 366 | |
4e5440c6 DL |
367 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
368 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 369 | return -1; |
370 | } | |
371 | ||
4e5440c6 | 372 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 373 | |
0ad19a3f | 374 | return 0; |
375 | } | |
376 | ||
52e35957 | 377 | static int setup_tty(const char *rootfs, const struct lxc_tty_info *tty_info) |
b0a33c1e | 378 | { |
379 | char path[MAXPATHLEN]; | |
380 | int i; | |
381 | ||
382 | for (i = 0; i < tty_info->nbtty; i++) { | |
383 | ||
384 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
385 | ||
52e35957 DL |
386 | snprintf(path, sizeof(path), "%s/dev/tty%d", |
387 | rootfs ? rootfs : "", i + 1); | |
b0a33c1e | 388 | |
13954cce | 389 | /* At this point I can not use the "access" function |
b0a33c1e | 390 | * to check the file is present or not because it fails |
391 | * with EACCES errno and I don't know why :( */ | |
13954cce | 392 | |
b0a33c1e | 393 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
36eb9bde | 394 | WARN("failed to mount '%s'->'%s'", |
52e35957 | 395 | pty_info->name, path); |
b0a33c1e | 396 | continue; |
397 | } | |
398 | } | |
399 | ||
cd54d859 DL |
400 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
401 | ||
b0a33c1e | 402 | return 0; |
403 | } | |
404 | ||
7a7ff0c6 | 405 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
406 | { |
407 | struct lxc_list *mountlist, *listentry, *iterator; | |
408 | char *pivotdir, *mountpoint, *mountentry; | |
409 | int found; | |
410 | void **cbparm; | |
411 | ||
412 | mountentry = buffer; | |
413 | cbparm = (void **)data; | |
414 | ||
415 | mountlist = cbparm[0]; | |
416 | pivotdir = cbparm[1]; | |
417 | ||
418 | /* parse entry, first field is mountname, ignore */ | |
419 | mountpoint = strtok(mountentry, " "); | |
420 | if (!mountpoint) | |
421 | return -1; | |
422 | ||
423 | /* second field is mountpoint */ | |
424 | mountpoint = strtok(NULL, " "); | |
425 | if (!mountpoint) | |
426 | return -1; | |
427 | ||
428 | /* only consider mountpoints below old root fs */ | |
429 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
430 | return 0; | |
431 | ||
432 | /* filter duplicate mountpoints */ | |
433 | found = 0; | |
434 | lxc_list_for_each(iterator, mountlist) { | |
435 | if (!strcmp(iterator->elem, mountpoint)) { | |
436 | found = 1; | |
437 | break; | |
438 | } | |
439 | } | |
440 | if (found) | |
441 | return 0; | |
442 | ||
443 | /* add entry to list */ | |
444 | listentry = malloc(sizeof(*listentry)); | |
445 | if (!listentry) { | |
446 | SYSERROR("malloc for mountpoint listentry failed"); | |
447 | return -1; | |
448 | } | |
449 | ||
450 | listentry->elem = strdup(mountpoint); | |
451 | if (!listentry->elem) { | |
452 | SYSERROR("strdup failed"); | |
453 | return -1; | |
454 | } | |
455 | lxc_list_add_tail(mountlist, listentry); | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
bf601689 MH |
460 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) |
461 | { | |
2382ecff | 462 | char path[MAXPATHLEN]; |
bf601689 MH |
463 | void *cbparm[2]; |
464 | struct lxc_list mountlist, *iterator; | |
465 | int ok, still_mounted, last_still_mounted; | |
bf601689 MH |
466 | |
467 | /* change into new root fs */ | |
468 | if (chdir(rootfs)) { | |
469 | SYSERROR("can't chroot to new rootfs '%s'", rootfs); | |
470 | return -1; | |
471 | } | |
472 | ||
0b7a8353 DL |
473 | if (!pivotdir) |
474 | pivotdir = "oldrootfs"; | |
bf601689 | 475 | |
0b7a8353 DL |
476 | /* create a default mountpoint if none specified */ |
477 | snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); | |
bf601689 | 478 | |
0b7a8353 DL |
479 | if (access(path, F_OK)) { |
480 | ||
481 | if (mkdir_p(path, 0755)) { | |
482 | SYSERROR("failed to create pivotdir '%s'", path); | |
bf601689 MH |
483 | return -1; |
484 | } | |
485 | ||
0b7a8353 | 486 | DEBUG("created '%s' directory", path); |
bf601689 MH |
487 | } |
488 | ||
1b09f2c0 | 489 | DEBUG("mountpoint for old rootfs is '%s'", path); |
bf601689 MH |
490 | |
491 | /* pivot_root into our new root fs */ | |
492 | ||
493 | if (pivot_root(".", path)) { | |
494 | SYSERROR("pivot_root syscall failed"); | |
495 | return -1; | |
496 | } | |
497 | ||
498 | if (chdir("/")) { | |
499 | SYSERROR("can't chroot to / after pivot_root"); | |
500 | return -1; | |
501 | } | |
502 | ||
503 | DEBUG("pivot_root syscall to '%s' successful", pivotdir); | |
504 | ||
505 | /* read and parse /proc/mounts in old root fs */ | |
506 | lxc_list_init(&mountlist); | |
507 | ||
508 | snprintf(path, sizeof(path), "%s/", pivotdir); | |
509 | cbparm[0] = &mountlist; | |
510 | cbparm[1] = strdup(path); | |
511 | ||
512 | if (!cbparm[1]) { | |
513 | SYSERROR("strdup failed"); | |
514 | return -1; | |
515 | } | |
516 | ||
517 | snprintf(path, sizeof(path), "/%s/proc/mounts", pivotdir); | |
2382ecff | 518 | ok = lxc_file_for_each_line(path, setup_rootfs_pivot_root_cb, &cbparm); |
bf601689 MH |
519 | if (ok < 0) { |
520 | SYSERROR("failed to read or parse mount list '%s'", path); | |
521 | return -1; | |
522 | } | |
523 | ||
524 | /* umount filesystems until none left or list no longer shrinks */ | |
525 | still_mounted = 0; | |
526 | do { | |
527 | last_still_mounted = still_mounted; | |
528 | still_mounted = 0; | |
529 | ||
530 | lxc_list_for_each(iterator, &mountlist) { | |
531 | ||
c08556c6 | 532 | /* umount normally */ |
bf601689 MH |
533 | if (!umount(iterator->elem)) { |
534 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
535 | lxc_list_del(iterator); | |
536 | continue; | |
537 | } | |
538 | ||
bf601689 MH |
539 | still_mounted++; |
540 | } | |
7df119ee | 541 | |
bf601689 MH |
542 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
543 | ||
7df119ee | 544 | |
c08556c6 DL |
545 | lxc_list_for_each(iterator, &mountlist) { |
546 | ||
547 | /* let's try a lazy umount */ | |
548 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
549 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
550 | continue; | |
551 | } | |
552 | ||
553 | /* be more brutal (nfs) */ | |
554 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
555 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
556 | continue; | |
557 | } | |
558 | ||
7df119ee | 559 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 560 | } |
bf601689 | 561 | |
c08556c6 DL |
562 | /* umount old root fs; if some other mount points are still |
563 | * there, we won't be able to umount it, so we have to do | |
564 | * that in a lazy way otherwise the container will always | |
565 | * fail to start | |
566 | */ | |
567 | if (umount2(pivotdir, MNT_DETACH)) { | |
bf601689 MH |
568 | SYSERROR("could not unmount old rootfs"); |
569 | return -1; | |
570 | } | |
571 | DEBUG("umounted '%s'", pivotdir); | |
572 | ||
c08556c6 DL |
573 | /* remove temporary mount point, we don't consider the removing |
574 | * as fatal */ | |
0b7a8353 DL |
575 | if (rmdir(pivotdir)) |
576 | WARN("can't remove mountpoint: %m"); | |
bf601689 MH |
577 | |
578 | INFO("pivoted to '%s'", rootfs); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | static int setup_rootfs(const char *rootfs, const char *pivotdir) | |
0ad19a3f | 583 | { |
25368b52 | 584 | const char *tmpfs = "/tmp"; |
0ad19a3f | 585 | |
c69bd12f DL |
586 | if (!rootfs) |
587 | return 0; | |
0ad19a3f | 588 | |
25368b52 FW |
589 | if (mount(rootfs, tmpfs, "none", MS_BIND|MS_REC, NULL)) { |
590 | SYSERROR("failed to mount '%s'->'%s'", rootfs, "/tmp"); | |
c3f0a28c | 591 | return -1; |
592 | } | |
0ad19a3f | 593 | |
25368b52 | 594 | DEBUG("mounted '%s' on '%s'", rootfs, tmpfs); |
c69bd12f | 595 | |
25368b52 | 596 | if (setup_rootfs_pivot_root(tmpfs, pivotdir)) { |
bf601689 | 597 | ERROR("failed to pivot_root to '%s'", rootfs); |
25368b52 | 598 | return -1; |
c69bd12f DL |
599 | } |
600 | ||
25368b52 | 601 | return 0; |
0ad19a3f | 602 | } |
603 | ||
d852c78c | 604 | static int setup_pts(int pts) |
3c26f34e | 605 | { |
d852c78c DL |
606 | if (!pts) |
607 | return 0; | |
3c26f34e | 608 | |
609 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 610 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 611 | return -1; |
612 | } | |
613 | ||
d852c78c | 614 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, "newinstance")) { |
36eb9bde | 615 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 616 | return -1; |
617 | } | |
618 | ||
619 | if (chmod("/dev/pts/ptmx", 0666)) { | |
36eb9bde | 620 | SYSERROR("failed to set permission for '/dev/pts/ptmx'"); |
3c26f34e | 621 | return -1; |
622 | } | |
623 | ||
624 | if (access("/dev/ptmx", F_OK)) { | |
625 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
626 | goto out; | |
36eb9bde | 627 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 628 | return -1; |
629 | } | |
630 | ||
631 | /* fallback here, /dev/pts/ptmx exists just mount bind */ | |
632 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 633 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 634 | return -1; |
635 | } | |
cd54d859 DL |
636 | |
637 | INFO("created new pts instance"); | |
d852c78c | 638 | |
3c26f34e | 639 | out: |
640 | return 0; | |
641 | } | |
642 | ||
63376d7d | 643 | static int setup_console(const char *rootfs, const struct lxc_console *console) |
6e590161 | 644 | { |
63376d7d DL |
645 | char path[MAXPATHLEN]; |
646 | struct stat s; | |
52e35957 | 647 | |
63376d7d DL |
648 | /* We don't have a rootfs, /dev/console will be shared */ |
649 | if (!rootfs) | |
650 | return 0; | |
52e35957 | 651 | |
63376d7d | 652 | snprintf(path, sizeof(path), "%s/dev/console", rootfs); |
52e35957 | 653 | |
63376d7d DL |
654 | if (access(path, F_OK)) { |
655 | WARN("rootfs specified but no console found"); | |
656 | return 0; | |
52e35957 DL |
657 | } |
658 | ||
f78a1f32 | 659 | if (console->peer == -1) { |
63376d7d | 660 | INFO("no console output required"); |
f78a1f32 DL |
661 | return 0; |
662 | } | |
ed502555 | 663 | |
63376d7d DL |
664 | if (stat(path, &s)) { |
665 | SYSERROR("failed to stat '%s'", path); | |
666 | return -1; | |
667 | } | |
668 | ||
669 | if (chmod(console->name, s.st_mode)) { | |
670 | SYSERROR("failed to set mode '0%o' to '%s'", | |
671 | s.st_mode, console->name); | |
672 | return -1; | |
673 | } | |
13954cce | 674 | |
63376d7d DL |
675 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
676 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 677 | return -1; |
678 | } | |
679 | ||
63376d7d | 680 | INFO("console has been setup"); |
cd54d859 | 681 | |
6e590161 | 682 | return 0; |
683 | } | |
684 | ||
102a5303 | 685 | static int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 686 | { |
102a5303 DL |
687 | struct lxc_list *iterator; |
688 | struct lxc_cgroup *cg; | |
88329c69 | 689 | int ret = -1; |
6f4a3756 | 690 | |
102a5303 DL |
691 | if (lxc_list_empty(cgroups)) |
692 | return 0; | |
6f4a3756 | 693 | |
102a5303 | 694 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 695 | |
102a5303 | 696 | cg = iterator->elem; |
6f4a3756 | 697 | |
102a5303 | 698 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 699 | goto out; |
6f4a3756 | 700 | |
102a5303 | 701 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 702 | } |
13954cce | 703 | |
88329c69 | 704 | ret = 0; |
cd54d859 | 705 | INFO("cgroup has been setup"); |
88329c69 MN |
706 | out: |
707 | return ret; | |
576f946d | 708 | } |
709 | ||
998ac676 RT |
710 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
711 | { | |
712 | struct mount_opt *mo; | |
713 | ||
714 | /* If opt is found in mount_opt, set or clear flags. | |
715 | * Otherwise append it to data. */ | |
716 | ||
717 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
718 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
719 | if (mo->clear) | |
720 | *flags &= ~mo->flag; | |
721 | else | |
722 | *flags |= mo->flag; | |
723 | return; | |
724 | } | |
725 | } | |
726 | ||
727 | if (strlen(*data)) | |
728 | strcat(*data, ","); | |
729 | strcat(*data, opt); | |
730 | } | |
731 | ||
732 | static int parse_mntopts(struct mntent *mntent, unsigned long *mntflags, | |
733 | char **mntdata) | |
734 | { | |
735 | char *s, *data; | |
736 | char *p, *saveptr = NULL; | |
737 | ||
738 | if (!mntent->mnt_opts) | |
739 | return 0; | |
740 | ||
741 | s = strdup(mntent->mnt_opts); | |
742 | if (!s) { | |
36eb9bde | 743 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
744 | return -1; |
745 | } | |
746 | ||
747 | data = malloc(strlen(s) + 1); | |
748 | if (!data) { | |
36eb9bde | 749 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
750 | free(s); |
751 | return -1; | |
752 | } | |
753 | *data = 0; | |
754 | ||
755 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
756 | p = strtok_r(NULL, ",", &saveptr)) | |
757 | parse_mntopt(p, mntflags, &data); | |
758 | ||
759 | if (*data) | |
760 | *mntdata = data; | |
761 | else | |
762 | free(data); | |
763 | free(s); | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
e7938e9e | 768 | static int mount_file_entries(FILE *file) |
0ad19a3f | 769 | { |
0ad19a3f | 770 | struct mntent *mntent; |
0ad19a3f | 771 | int ret = -1; |
998ac676 RT |
772 | unsigned long mntflags; |
773 | char *mntdata; | |
0ad19a3f | 774 | |
998ac676 | 775 | while ((mntent = getmntent(file))) { |
1bc60a65 | 776 | |
998ac676 RT |
777 | mntflags = 0; |
778 | mntdata = NULL; | |
779 | if (parse_mntopts(mntent, &mntflags, &mntdata) < 0) { | |
36eb9bde | 780 | ERROR("failed to parse mount option '%s'", |
998ac676 RT |
781 | mntent->mnt_opts); |
782 | goto out; | |
783 | } | |
0ad19a3f | 784 | |
785 | if (mount(mntent->mnt_fsname, mntent->mnt_dir, | |
998ac676 | 786 | mntent->mnt_type, mntflags, mntdata)) { |
36eb9bde | 787 | SYSERROR("failed to mount '%s' on '%s'", |
0ad19a3f | 788 | mntent->mnt_fsname, mntent->mnt_dir); |
789 | goto out; | |
790 | } | |
998ac676 | 791 | |
cd54d859 DL |
792 | DEBUG("mounted %s on %s, type %s", mntent->mnt_fsname, |
793 | mntent->mnt_dir, mntent->mnt_type); | |
794 | ||
998ac676 | 795 | free(mntdata); |
0ad19a3f | 796 | } |
cd54d859 | 797 | |
0ad19a3f | 798 | ret = 0; |
cd54d859 DL |
799 | |
800 | INFO("mount points have been setup"); | |
0ad19a3f | 801 | out: |
e7938e9e MN |
802 | return ret; |
803 | } | |
804 | ||
805 | static int setup_mount(const char *fstab) | |
806 | { | |
807 | FILE *file; | |
808 | int ret; | |
809 | ||
810 | if (!fstab) | |
811 | return 0; | |
812 | ||
813 | file = setmntent(fstab, "r"); | |
814 | if (!file) { | |
815 | SYSERROR("failed to use '%s'", fstab); | |
816 | return -1; | |
817 | } | |
818 | ||
819 | ret = mount_file_entries(file); | |
820 | ||
0ad19a3f | 821 | endmntent(file); |
822 | return ret; | |
823 | } | |
824 | ||
e7938e9e MN |
825 | static int setup_mount_entries(struct lxc_list *mount) |
826 | { | |
827 | FILE *file; | |
828 | struct lxc_list *iterator; | |
829 | char *mount_entry; | |
830 | int ret; | |
831 | ||
832 | file = tmpfile(); | |
833 | if (!file) { | |
834 | ERROR("tmpfile error: %m"); | |
835 | return -1; | |
836 | } | |
837 | ||
838 | lxc_list_for_each(iterator, mount) { | |
839 | mount_entry = iterator->elem; | |
1d6b1976 | 840 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
841 | } |
842 | ||
843 | rewind(file); | |
844 | ||
845 | ret = mount_file_entries(file); | |
846 | ||
847 | fclose(file); | |
848 | return ret; | |
849 | } | |
850 | ||
81810dd1 DL |
851 | static int setup_caps(struct lxc_list *caps) |
852 | { | |
853 | struct lxc_list *iterator; | |
854 | char *drop_entry; | |
855 | int i, capid; | |
856 | ||
857 | lxc_list_for_each(iterator, caps) { | |
858 | ||
859 | drop_entry = iterator->elem; | |
860 | ||
861 | capid = -1; | |
862 | ||
863 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
864 | ||
865 | if (strcmp(drop_entry, caps_opt[i].name)) | |
866 | continue; | |
867 | ||
868 | capid = caps_opt[i].value; | |
869 | break; | |
870 | } | |
871 | ||
872 | if (capid < 0) { | |
1e11be34 DL |
873 | ERROR("unknown capability %s", drop_entry); |
874 | return -1; | |
81810dd1 DL |
875 | } |
876 | ||
877 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
878 | ||
879 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
880 | SYSERROR("failed to remove %s capability", drop_entry); | |
881 | return -1; | |
882 | } | |
883 | ||
884 | } | |
885 | ||
886 | DEBUG("capabilities has been setup"); | |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
0ad19a3f | 891 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
892 | { | |
893 | struct sockaddr sockaddr; | |
894 | struct ifreq ifr; | |
895 | int ret, fd; | |
896 | ||
3cfc0f3a MN |
897 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
898 | if (ret) { | |
899 | ERROR("mac address '%s' conversion failed : %s", | |
900 | hwaddr, strerror(-ret)); | |
0ad19a3f | 901 | return -1; |
902 | } | |
903 | ||
904 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
905 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
906 | ||
907 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
908 | if (fd < 0) { | |
3ab87b66 | 909 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 910 | return -1; |
911 | } | |
912 | ||
913 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
914 | close(fd); | |
915 | if (ret) | |
3ab87b66 | 916 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 917 | |
cd54d859 DL |
918 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
919 | ||
0ad19a3f | 920 | return ret; |
921 | } | |
922 | ||
82d5ae15 | 923 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 924 | { |
82d5ae15 DL |
925 | struct lxc_list *iterator; |
926 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 927 | int err; |
0ad19a3f | 928 | |
82d5ae15 DL |
929 | lxc_list_for_each(iterator, ip) { |
930 | ||
931 | inetdev = iterator->elem; | |
932 | ||
3cfc0f3a MN |
933 | err = lxc_ip_addr_add(AF_INET, ifindex, |
934 | &inetdev->addr, inetdev->prefix); | |
935 | if (err) { | |
936 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
937 | ifindex, strerror(-err)); | |
82d5ae15 DL |
938 | return -1; |
939 | } | |
940 | } | |
941 | ||
942 | return 0; | |
0ad19a3f | 943 | } |
944 | ||
82d5ae15 | 945 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 946 | { |
82d5ae15 | 947 | struct lxc_list *iterator; |
7fa9074f | 948 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 949 | int err; |
0ad19a3f | 950 | |
82d5ae15 DL |
951 | lxc_list_for_each(iterator, ip) { |
952 | ||
953 | inet6dev = iterator->elem; | |
954 | ||
3cfc0f3a MN |
955 | err = lxc_ip_addr_add(AF_INET6, ifindex, |
956 | &inet6dev->addr, inet6dev->prefix); | |
957 | if (err) { | |
958 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
959 | ifindex, strerror(-err)); | |
82d5ae15 | 960 | return -1; |
3cfc0f3a | 961 | } |
82d5ae15 DL |
962 | } |
963 | ||
964 | return 0; | |
0ad19a3f | 965 | } |
966 | ||
82d5ae15 | 967 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 968 | { |
0ad19a3f | 969 | char ifname[IFNAMSIZ]; |
0ad19a3f | 970 | char *current_ifname = ifname; |
3cfc0f3a | 971 | int err; |
0ad19a3f | 972 | |
82d5ae15 DL |
973 | /* empty network namespace */ |
974 | if (!netdev->ifindex) { | |
975 | if (netdev->flags | IFF_UP) { | |
3cfc0f3a MN |
976 | err = lxc_device_up("lo"); |
977 | if (err) { | |
978 | ERROR("failed to set the loopback up : %s", | |
979 | strerror(-err)); | |
82d5ae15 DL |
980 | return -1; |
981 | } | |
982 | return 0; | |
983 | } | |
0ad19a3f | 984 | } |
13954cce | 985 | |
82d5ae15 DL |
986 | /* retrieve the name of the interface */ |
987 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 988 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 989 | netdev->ifindex); |
0ad19a3f | 990 | return -1; |
991 | } | |
13954cce | 992 | |
018ef520 | 993 | /* default: let the system to choose one interface name */ |
9d083402 MT |
994 | if (!netdev->name) |
995 | netdev->name = "eth%d"; | |
018ef520 | 996 | |
82d5ae15 | 997 | /* rename the interface name */ |
3cfc0f3a MN |
998 | err = lxc_device_rename(ifname, netdev->name); |
999 | if (err) { | |
1000 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1001 | strerror(-err)); | |
018ef520 DL |
1002 | return -1; |
1003 | } | |
1004 | ||
1005 | /* Re-read the name of the interface because its name has changed | |
1006 | * and would be automatically allocated by the system | |
1007 | */ | |
82d5ae15 | 1008 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1009 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1010 | netdev->ifindex); |
018ef520 | 1011 | return -1; |
0ad19a3f | 1012 | } |
1013 | ||
82d5ae15 DL |
1014 | /* set a mac address */ |
1015 | if (netdev->hwaddr) { | |
1016 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1017 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1018 | current_ifname); |
0ad19a3f | 1019 | return -1; |
1020 | } | |
1021 | } | |
1022 | ||
82d5ae15 DL |
1023 | /* setup ipv4 addresses on the interface */ |
1024 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1025 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1026 | ifname); |
1027 | return -1; | |
1028 | } | |
1029 | ||
82d5ae15 DL |
1030 | /* setup ipv6 addresses on the interface */ |
1031 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1032 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1033 | ifname); |
1034 | return -1; | |
1035 | } | |
1036 | ||
82d5ae15 DL |
1037 | /* set the network device up */ |
1038 | if (netdev->flags | IFF_UP) { | |
3cfc0f3a MN |
1039 | int err; |
1040 | ||
1041 | err = lxc_device_up(current_ifname); | |
1042 | if (err) { | |
1043 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1044 | strerror(-err)); | |
0ad19a3f | 1045 | return -1; |
1046 | } | |
1047 | ||
1048 | /* the network is up, make the loopback up too */ | |
3cfc0f3a MN |
1049 | err = lxc_device_up("lo"); |
1050 | if (err) { | |
1051 | ERROR("failed to set the loopback up : %s", | |
1052 | strerror(-err)); | |
0ad19a3f | 1053 | return -1; |
1054 | } | |
1055 | } | |
1056 | ||
cd54d859 DL |
1057 | DEBUG("'%s' has been setup", current_ifname); |
1058 | ||
0ad19a3f | 1059 | return 0; |
1060 | } | |
1061 | ||
5f4535a3 | 1062 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1063 | { |
82d5ae15 | 1064 | struct lxc_list *iterator; |
82d5ae15 | 1065 | struct lxc_netdev *netdev; |
0ad19a3f | 1066 | |
5f4535a3 | 1067 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1068 | |
5f4535a3 | 1069 | netdev = iterator->elem; |
82d5ae15 DL |
1070 | |
1071 | if (setup_netdev(netdev)) { | |
1072 | ERROR("failed to setup netdev"); | |
1073 | return -1; | |
1074 | } | |
1075 | } | |
cd54d859 | 1076 | |
5f4535a3 DL |
1077 | if (!lxc_list_empty(network)) |
1078 | INFO("network has been setup"); | |
cd54d859 DL |
1079 | |
1080 | return 0; | |
0ad19a3f | 1081 | } |
1082 | ||
7b379ab3 | 1083 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 1084 | { |
7b379ab3 MN |
1085 | struct lxc_conf *new; |
1086 | ||
1087 | new = malloc(sizeof(*new)); | |
1088 | if (!new) { | |
1089 | ERROR("lxc_conf_init : %m"); | |
1090 | return NULL; | |
1091 | } | |
1092 | memset(new, 0, sizeof(*new)); | |
1093 | ||
28a4b0e5 | 1094 | new->console.path = NULL; |
63376d7d DL |
1095 | new->console.peer = -1; |
1096 | new->console.master = -1; | |
1097 | new->console.slave = -1; | |
1098 | new->console.name[0] = '\0'; | |
7b379ab3 MN |
1099 | lxc_list_init(&new->cgroup); |
1100 | lxc_list_init(&new->network); | |
1101 | lxc_list_init(&new->mount_list); | |
81810dd1 | 1102 | lxc_list_init(&new->caps); |
7b379ab3 MN |
1103 | |
1104 | return new; | |
089cd8b8 DL |
1105 | } |
1106 | ||
82d5ae15 | 1107 | static int instanciate_veth(struct lxc_netdev *netdev) |
0ad19a3f | 1108 | { |
8634bc19 | 1109 | char veth1buf[IFNAMSIZ], *veth1; |
82d5ae15 | 1110 | char veth2[IFNAMSIZ]; |
3cfc0f3a | 1111 | int err; |
13954cce | 1112 | |
e892973e DL |
1113 | if (netdev->priv.veth_attr.pair) |
1114 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 MT |
1115 | else { |
1116 | snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
1117 | mktemp(veth1buf); | |
1118 | veth1 = veth1buf; | |
1119 | } | |
82d5ae15 | 1120 | |
8634bc19 | 1121 | snprintf(veth2, sizeof(veth2), "vethXXXXXX"); |
82d5ae15 DL |
1122 | mktemp(veth2); |
1123 | ||
1124 | if (!strlen(veth1) || !strlen(veth2)) { | |
1125 | ERROR("failed to allocate a temporary name"); | |
1126 | return -1; | |
0ad19a3f | 1127 | } |
1128 | ||
3cfc0f3a MN |
1129 | err = lxc_veth_create(veth1, veth2); |
1130 | if (err) { | |
1131 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
1132 | strerror(-err)); | |
6ab9ab6d | 1133 | return -1; |
0ad19a3f | 1134 | } |
13954cce | 1135 | |
82d5ae15 | 1136 | if (netdev->mtu) { |
3cfc0f3a MN |
1137 | err = lxc_device_set_mtu(veth1, atoi(netdev->mtu)); |
1138 | if (!err) | |
1139 | err = lxc_device_set_mtu(veth2, atoi(netdev->mtu)); | |
1140 | if (err) { | |
1141 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
1142 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 1143 | goto out_delete; |
75d09f83 DL |
1144 | } |
1145 | } | |
1146 | ||
3cfc0f3a MN |
1147 | if (netdev->link) { |
1148 | err = lxc_bridge_attach(netdev->link, veth1); | |
1149 | if (err) { | |
1150 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
1151 | veth1, netdev->link, strerror(-err)); | |
1152 | goto out_delete; | |
1153 | } | |
eb14c10a DL |
1154 | } |
1155 | ||
82d5ae15 DL |
1156 | netdev->ifindex = if_nametoindex(veth2); |
1157 | if (!netdev->ifindex) { | |
36eb9bde | 1158 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
1159 | goto out_delete; |
1160 | } | |
1161 | ||
82d5ae15 | 1162 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1163 | err = lxc_device_up(veth1); |
1164 | if (err) { | |
1165 | ERROR("failed to set %s up : %s", veth1, | |
1166 | strerror(-err)); | |
eb14c10a | 1167 | goto out_delete; |
0ad19a3f | 1168 | } |
1169 | } | |
1170 | ||
82d5ae15 DL |
1171 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
1172 | veth1, veth2, netdev->ifindex); | |
1173 | ||
6ab9ab6d | 1174 | return 0; |
eb14c10a DL |
1175 | |
1176 | out_delete: | |
1177 | lxc_device_delete(veth1); | |
6ab9ab6d | 1178 | return -1; |
13954cce | 1179 | } |
d957ae2d | 1180 | |
82d5ae15 | 1181 | static int instanciate_macvlan(struct lxc_netdev *netdev) |
0ad19a3f | 1182 | { |
82d5ae15 | 1183 | char peer[IFNAMSIZ]; |
3cfc0f3a | 1184 | int err; |
d957ae2d MT |
1185 | |
1186 | if (!netdev->link) { | |
1187 | ERROR("no link specified for macvlan netdev"); | |
1188 | return -1; | |
1189 | } | |
13954cce | 1190 | |
82d5ae15 | 1191 | snprintf(peer, sizeof(peer), "mcXXXXXX"); |
22ebac19 | 1192 | |
82d5ae15 DL |
1193 | mktemp(peer); |
1194 | ||
1195 | if (!strlen(peer)) { | |
1196 | ERROR("failed to make a temporary name"); | |
1197 | return -1; | |
0ad19a3f | 1198 | } |
1199 | ||
3cfc0f3a MN |
1200 | err = lxc_macvlan_create(netdev->link, peer, |
1201 | netdev->priv.macvlan_attr.mode); | |
1202 | if (err) { | |
1203 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
1204 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 1205 | return -1; |
0ad19a3f | 1206 | } |
1207 | ||
82d5ae15 DL |
1208 | netdev->ifindex = if_nametoindex(peer); |
1209 | if (!netdev->ifindex) { | |
36eb9bde | 1210 | ERROR("failed to retrieve the index for %s", peer); |
d957ae2d MT |
1211 | lxc_device_delete(peer); |
1212 | return -1; | |
22ebac19 | 1213 | } |
1214 | ||
e892973e DL |
1215 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
1216 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 1217 | |
d957ae2d | 1218 | return 0; |
0ad19a3f | 1219 | } |
1220 | ||
26c39028 JHS |
1221 | /* XXX: merge with instanciate_macvlan */ |
1222 | static int instanciate_vlan(struct lxc_netdev *netdev) | |
1223 | { | |
1224 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 1225 | int err; |
26c39028 JHS |
1226 | |
1227 | if (!netdev->link) { | |
1228 | ERROR("no link specified for vlan netdev"); | |
1229 | return -1; | |
1230 | } | |
1231 | ||
e892973e | 1232 | snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
26c39028 | 1233 | |
3cfc0f3a MN |
1234 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
1235 | if (err) { | |
1236 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
1237 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
1238 | return -1; |
1239 | } | |
1240 | ||
1241 | netdev->ifindex = if_nametoindex(peer); | |
1242 | if (!netdev->ifindex) { | |
1243 | ERROR("failed to retrieve the ifindex for %s", peer); | |
1244 | lxc_device_delete(peer); | |
1245 | return -1; | |
1246 | } | |
1247 | ||
e892973e DL |
1248 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
1249 | netdev->ifindex); | |
1250 | ||
26c39028 JHS |
1251 | return 0; |
1252 | } | |
1253 | ||
82d5ae15 | 1254 | static int instanciate_phys(struct lxc_netdev *netdev) |
0ad19a3f | 1255 | { |
9d083402 | 1256 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 1257 | if (!netdev->ifindex) { |
9d083402 | 1258 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 1259 | return -1; |
1260 | } | |
1261 | ||
82d5ae15 | 1262 | return 0; |
0ad19a3f | 1263 | } |
1264 | ||
82d5ae15 | 1265 | static int instanciate_empty(struct lxc_netdev *netdev) |
0ad19a3f | 1266 | { |
82d5ae15 DL |
1267 | netdev->ifindex = 0; |
1268 | return 0; | |
0ad19a3f | 1269 | } |
1270 | ||
5f4535a3 | 1271 | int lxc_create_network(struct lxc_list *network) |
0ad19a3f | 1272 | { |
82d5ae15 | 1273 | struct lxc_list *iterator; |
82d5ae15 | 1274 | struct lxc_netdev *netdev; |
0ad19a3f | 1275 | |
5f4535a3 | 1276 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 1277 | |
5f4535a3 | 1278 | netdev = iterator->elem; |
13954cce | 1279 | |
24654103 | 1280 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 1281 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 1282 | netdev->type); |
82d5ae15 DL |
1283 | return -1; |
1284 | } | |
0ad19a3f | 1285 | |
5f4535a3 | 1286 | if (netdev_conf[netdev->type](netdev)) { |
82d5ae15 DL |
1287 | ERROR("failed to create netdev"); |
1288 | return -1; | |
1289 | } | |
0ad19a3f | 1290 | } |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
7fef7a06 DL |
1295 | void lxc_delete_network(struct lxc_list *network) |
1296 | { | |
1297 | struct lxc_list *iterator; | |
1298 | struct lxc_netdev *netdev; | |
1299 | ||
1300 | lxc_list_for_each(iterator, network) { | |
1301 | netdev = iterator->elem; | |
1302 | if (netdev->ifindex > 0) | |
1303 | lxc_device_delete_index(netdev->ifindex); | |
1304 | } | |
1305 | } | |
1306 | ||
5f4535a3 | 1307 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 1308 | { |
82d5ae15 | 1309 | struct lxc_list *iterator; |
82d5ae15 | 1310 | struct lxc_netdev *netdev; |
3cfc0f3a | 1311 | int err; |
0ad19a3f | 1312 | |
5f4535a3 | 1313 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 1314 | |
5f4535a3 | 1315 | netdev = iterator->elem; |
82d5ae15 | 1316 | |
236087a6 DL |
1317 | /* empty network namespace, nothing to move */ |
1318 | if (!netdev->ifindex) | |
1319 | continue; | |
1320 | ||
3cfc0f3a MN |
1321 | err = lxc_device_move(netdev->ifindex, pid); |
1322 | if (err) { | |
1323 | ERROR("failed to move '%s' to the container : %s", | |
1324 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
1325 | return -1; |
1326 | } | |
1327 | ||
9d083402 | 1328 | DEBUG("move '%s' to '%d'", netdev->link, pid); |
0ad19a3f | 1329 | } |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
5e4a62bf | 1334 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 1335 | { |
5e4a62bf | 1336 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 1337 | int i; |
b0a33c1e | 1338 | |
5e4a62bf DL |
1339 | /* no tty in the configuration */ |
1340 | if (!conf->tty) | |
b0a33c1e | 1341 | return 0; |
1342 | ||
13954cce | 1343 | tty_info->pty_info = |
e4e7d59d | 1344 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 1345 | if (!tty_info->pty_info) { |
36eb9bde | 1346 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 1347 | return -1; |
b0a33c1e | 1348 | } |
1349 | ||
985d15b1 | 1350 | for (i = 0; i < conf->tty; i++) { |
13954cce | 1351 | |
b0a33c1e | 1352 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
1353 | ||
13954cce | 1354 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 1355 | pty_info->name, NULL, NULL)) { |
36eb9bde | 1356 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
1357 | tty_info->nbtty = i; |
1358 | lxc_delete_tty(tty_info); | |
1359 | return -1; | |
b0a33c1e | 1360 | } |
1361 | ||
b035ad62 MS |
1362 | /* Prevent leaking the file descriptors to the container */ |
1363 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
1364 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
1365 | ||
b0a33c1e | 1366 | pty_info->busy = 0; |
1367 | } | |
1368 | ||
985d15b1 | 1369 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
1370 | |
1371 | INFO("tty's configured"); | |
1372 | ||
985d15b1 | 1373 | return 0; |
b0a33c1e | 1374 | } |
1375 | ||
1376 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
1377 | { | |
1378 | int i; | |
1379 | ||
1380 | for (i = 0; i < tty_info->nbtty; i++) { | |
1381 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
1382 | ||
1383 | close(pty_info->master); | |
1384 | close(pty_info->slave); | |
1385 | } | |
1386 | ||
1387 | free(tty_info->pty_info); | |
1388 | tty_info->nbtty = 0; | |
1389 | } | |
1390 | ||
571e6ec8 | 1391 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 1392 | { |
571e6ec8 | 1393 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 1394 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 1395 | return -1; |
0ad19a3f | 1396 | } |
1397 | ||
5f4535a3 | 1398 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 1399 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 1400 | return -1; |
0ad19a3f | 1401 | } |
1402 | ||
571e6ec8 | 1403 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
36eb9bde | 1404 | ERROR("failed to setup the cgroups for '%s'", name); |
95b5ffaf | 1405 | return -1; |
0ad19a3f | 1406 | } |
1407 | ||
571e6ec8 | 1408 | if (setup_mount(lxc_conf->fstab)) { |
36eb9bde | 1409 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 1410 | return -1; |
576f946d | 1411 | } |
1412 | ||
e7938e9e MN |
1413 | if (setup_mount_entries(&lxc_conf->mount_list)) { |
1414 | ERROR("failed to setup the mount entries for '%s'", name); | |
1415 | return -1; | |
1416 | } | |
1417 | ||
63376d7d | 1418 | if (setup_console(lxc_conf->rootfs, &lxc_conf->console)) { |
36eb9bde | 1419 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 1420 | return -1; |
6e590161 | 1421 | } |
1422 | ||
571e6ec8 | 1423 | if (setup_tty(lxc_conf->rootfs, &lxc_conf->tty_info)) { |
36eb9bde | 1424 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 1425 | return -1; |
b0a33c1e | 1426 | } |
1427 | ||
bf601689 | 1428 | if (setup_rootfs(lxc_conf->rootfs, lxc_conf->pivotdir)) { |
36eb9bde | 1429 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 1430 | return -1; |
ed502555 | 1431 | } |
1432 | ||
571e6ec8 | 1433 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 1434 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 1435 | return -1; |
3c26f34e | 1436 | } |
1437 | ||
81810dd1 DL |
1438 | if (setup_caps(&lxc_conf->caps)) { |
1439 | ERROR("failed to drop capabilities"); | |
1440 | return -1; | |
1441 | } | |
1442 | ||
cd54d859 DL |
1443 | NOTICE("'%s' is setup.", name); |
1444 | ||
0ad19a3f | 1445 | return 0; |
1446 | } |