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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 | ||
33fcb7a0 DL |
377 | static int setup_tty(const struct lxc_rootfs *rootfs, |
378 | const struct lxc_tty_info *tty_info) | |
b0a33c1e | 379 | { |
380 | char path[MAXPATHLEN]; | |
381 | int i; | |
382 | ||
383 | for (i = 0; i < tty_info->nbtty; i++) { | |
384 | ||
385 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
386 | ||
52e35957 | 387 | snprintf(path, sizeof(path), "%s/dev/tty%d", |
33fcb7a0 | 388 | rootfs->path ? rootfs->path : "", i + 1); |
b0a33c1e | 389 | |
13954cce | 390 | /* At this point I can not use the "access" function |
b0a33c1e | 391 | * to check the file is present or not because it fails |
392 | * with EACCES errno and I don't know why :( */ | |
13954cce | 393 | |
b0a33c1e | 394 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
36eb9bde | 395 | WARN("failed to mount '%s'->'%s'", |
52e35957 | 396 | pty_info->name, path); |
b0a33c1e | 397 | continue; |
398 | } | |
399 | } | |
400 | ||
cd54d859 DL |
401 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
402 | ||
b0a33c1e | 403 | return 0; |
404 | } | |
405 | ||
7a7ff0c6 | 406 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
407 | { |
408 | struct lxc_list *mountlist, *listentry, *iterator; | |
409 | char *pivotdir, *mountpoint, *mountentry; | |
410 | int found; | |
411 | void **cbparm; | |
412 | ||
413 | mountentry = buffer; | |
414 | cbparm = (void **)data; | |
415 | ||
416 | mountlist = cbparm[0]; | |
417 | pivotdir = cbparm[1]; | |
418 | ||
419 | /* parse entry, first field is mountname, ignore */ | |
420 | mountpoint = strtok(mountentry, " "); | |
421 | if (!mountpoint) | |
422 | return -1; | |
423 | ||
424 | /* second field is mountpoint */ | |
425 | mountpoint = strtok(NULL, " "); | |
426 | if (!mountpoint) | |
427 | return -1; | |
428 | ||
429 | /* only consider mountpoints below old root fs */ | |
430 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
431 | return 0; | |
432 | ||
433 | /* filter duplicate mountpoints */ | |
434 | found = 0; | |
435 | lxc_list_for_each(iterator, mountlist) { | |
436 | if (!strcmp(iterator->elem, mountpoint)) { | |
437 | found = 1; | |
438 | break; | |
439 | } | |
440 | } | |
441 | if (found) | |
442 | return 0; | |
443 | ||
444 | /* add entry to list */ | |
445 | listentry = malloc(sizeof(*listentry)); | |
446 | if (!listentry) { | |
447 | SYSERROR("malloc for mountpoint listentry failed"); | |
448 | return -1; | |
449 | } | |
450 | ||
451 | listentry->elem = strdup(mountpoint); | |
452 | if (!listentry->elem) { | |
453 | SYSERROR("strdup failed"); | |
454 | return -1; | |
455 | } | |
456 | lxc_list_add_tail(mountlist, listentry); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
bf601689 MH |
461 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) |
462 | { | |
2382ecff | 463 | char path[MAXPATHLEN]; |
bf601689 MH |
464 | void *cbparm[2]; |
465 | struct lxc_list mountlist, *iterator; | |
466 | int ok, still_mounted, last_still_mounted; | |
a91d897a | 467 | int remove_pivotdir = 0; |
bf601689 MH |
468 | |
469 | /* change into new root fs */ | |
470 | if (chdir(rootfs)) { | |
9232212a | 471 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); |
bf601689 MH |
472 | return -1; |
473 | } | |
474 | ||
0b7a8353 DL |
475 | if (!pivotdir) |
476 | pivotdir = "oldrootfs"; | |
bf601689 | 477 | |
0b7a8353 DL |
478 | /* create a default mountpoint if none specified */ |
479 | snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); | |
bf601689 | 480 | |
0b7a8353 DL |
481 | if (access(path, F_OK)) { |
482 | ||
483 | if (mkdir_p(path, 0755)) { | |
484 | SYSERROR("failed to create pivotdir '%s'", path); | |
bf601689 MH |
485 | return -1; |
486 | } | |
487 | ||
a91d897a | 488 | remove_pivotdir = 1; |
0b7a8353 | 489 | DEBUG("created '%s' directory", path); |
bf601689 MH |
490 | } |
491 | ||
1b09f2c0 | 492 | DEBUG("mountpoint for old rootfs is '%s'", path); |
bf601689 MH |
493 | |
494 | /* pivot_root into our new root fs */ | |
495 | ||
496 | if (pivot_root(".", path)) { | |
497 | SYSERROR("pivot_root syscall failed"); | |
498 | return -1; | |
499 | } | |
500 | ||
501 | if (chdir("/")) { | |
9232212a | 502 | SYSERROR("can't chdir to / after pivot_root"); |
bf601689 MH |
503 | return -1; |
504 | } | |
505 | ||
506 | DEBUG("pivot_root syscall to '%s' successful", pivotdir); | |
507 | ||
508 | /* read and parse /proc/mounts in old root fs */ | |
509 | lxc_list_init(&mountlist); | |
510 | ||
511 | snprintf(path, sizeof(path), "%s/", pivotdir); | |
512 | cbparm[0] = &mountlist; | |
513 | cbparm[1] = strdup(path); | |
514 | ||
515 | if (!cbparm[1]) { | |
516 | SYSERROR("strdup failed"); | |
517 | return -1; | |
518 | } | |
519 | ||
520 | snprintf(path, sizeof(path), "/%s/proc/mounts", pivotdir); | |
2382ecff | 521 | ok = lxc_file_for_each_line(path, setup_rootfs_pivot_root_cb, &cbparm); |
bf601689 MH |
522 | if (ok < 0) { |
523 | SYSERROR("failed to read or parse mount list '%s'", path); | |
524 | return -1; | |
525 | } | |
526 | ||
527 | /* umount filesystems until none left or list no longer shrinks */ | |
528 | still_mounted = 0; | |
529 | do { | |
530 | last_still_mounted = still_mounted; | |
531 | still_mounted = 0; | |
532 | ||
533 | lxc_list_for_each(iterator, &mountlist) { | |
534 | ||
c08556c6 | 535 | /* umount normally */ |
bf601689 MH |
536 | if (!umount(iterator->elem)) { |
537 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
538 | lxc_list_del(iterator); | |
539 | continue; | |
540 | } | |
541 | ||
bf601689 MH |
542 | still_mounted++; |
543 | } | |
7df119ee | 544 | |
bf601689 MH |
545 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
546 | ||
7df119ee | 547 | |
c08556c6 DL |
548 | lxc_list_for_each(iterator, &mountlist) { |
549 | ||
550 | /* let's try a lazy umount */ | |
551 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
552 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
553 | continue; | |
554 | } | |
555 | ||
556 | /* be more brutal (nfs) */ | |
557 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
558 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
559 | continue; | |
560 | } | |
561 | ||
7df119ee | 562 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 563 | } |
bf601689 | 564 | |
c08556c6 DL |
565 | /* umount old root fs; if some other mount points are still |
566 | * there, we won't be able to umount it, so we have to do | |
567 | * that in a lazy way otherwise the container will always | |
568 | * fail to start | |
569 | */ | |
570 | if (umount2(pivotdir, MNT_DETACH)) { | |
bf601689 MH |
571 | SYSERROR("could not unmount old rootfs"); |
572 | return -1; | |
573 | } | |
574 | DEBUG("umounted '%s'", pivotdir); | |
575 | ||
c08556c6 DL |
576 | /* remove temporary mount point, we don't consider the removing |
577 | * as fatal */ | |
a91d897a FW |
578 | if (remove_pivotdir && rmdir(pivotdir)) |
579 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 MH |
580 | |
581 | INFO("pivoted to '%s'", rootfs); | |
582 | return 0; | |
583 | } | |
584 | ||
33fcb7a0 | 585 | static int setup_rootfs(const struct lxc_rootfs *rootfs) |
0ad19a3f | 586 | { |
b1789442 | 587 | char *mpath = LXCROOTFSMOUNT; |
0ad19a3f | 588 | |
33fcb7a0 | 589 | if (!rootfs->path) |
c69bd12f | 590 | return 0; |
0ad19a3f | 591 | |
b1789442 DL |
592 | if (rootfs->mount) |
593 | mpath = rootfs->mount; | |
594 | ||
595 | if (access(mpath, F_OK)) { | |
596 | SYSERROR("failed to access to '%s', check it is present", | |
597 | mpath); | |
598 | return -1; | |
599 | } | |
600 | ||
601 | if (mount(rootfs->path, mpath, "none", MS_BIND|MS_REC, NULL)) { | |
602 | SYSERROR("failed to mount '%s'->'%s'", rootfs->path, mpath); | |
c3f0a28c | 603 | return -1; |
604 | } | |
0ad19a3f | 605 | |
b1789442 | 606 | DEBUG("mounted '%s' on '%s'", rootfs->path, mpath); |
c69bd12f | 607 | |
b1789442 | 608 | if (setup_rootfs_pivot_root(mpath, rootfs->pivot)) { |
33fcb7a0 | 609 | ERROR("failed to pivot_root to '%s'", rootfs->pivot); |
25368b52 | 610 | return -1; |
c69bd12f DL |
611 | } |
612 | ||
25368b52 | 613 | return 0; |
0ad19a3f | 614 | } |
615 | ||
d852c78c | 616 | static int setup_pts(int pts) |
3c26f34e | 617 | { |
d852c78c DL |
618 | if (!pts) |
619 | return 0; | |
3c26f34e | 620 | |
621 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 622 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 623 | return -1; |
624 | } | |
625 | ||
2ac29abe | 626 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, "newinstance,ptmxmode=0666")) { |
36eb9bde | 627 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 628 | return -1; |
629 | } | |
630 | ||
3c26f34e | 631 | if (access("/dev/ptmx", F_OK)) { |
632 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
633 | goto out; | |
36eb9bde | 634 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 635 | return -1; |
636 | } | |
637 | ||
638 | /* fallback here, /dev/pts/ptmx exists just mount bind */ | |
639 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 640 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 641 | return -1; |
642 | } | |
cd54d859 DL |
643 | |
644 | INFO("created new pts instance"); | |
d852c78c | 645 | |
3c26f34e | 646 | out: |
647 | return 0; | |
648 | } | |
649 | ||
33fcb7a0 DL |
650 | static int setup_console(const struct lxc_rootfs *rootfs, |
651 | const struct lxc_console *console) | |
6e590161 | 652 | { |
63376d7d DL |
653 | char path[MAXPATHLEN]; |
654 | struct stat s; | |
52e35957 | 655 | |
63376d7d | 656 | /* We don't have a rootfs, /dev/console will be shared */ |
33fcb7a0 | 657 | if (!rootfs->path) |
63376d7d | 658 | return 0; |
52e35957 | 659 | |
33fcb7a0 | 660 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->path); |
52e35957 | 661 | |
63376d7d DL |
662 | if (access(path, F_OK)) { |
663 | WARN("rootfs specified but no console found"); | |
664 | return 0; | |
52e35957 DL |
665 | } |
666 | ||
f78a1f32 | 667 | if (console->peer == -1) { |
63376d7d | 668 | INFO("no console output required"); |
f78a1f32 DL |
669 | return 0; |
670 | } | |
ed502555 | 671 | |
63376d7d DL |
672 | if (stat(path, &s)) { |
673 | SYSERROR("failed to stat '%s'", path); | |
674 | return -1; | |
675 | } | |
676 | ||
677 | if (chmod(console->name, s.st_mode)) { | |
678 | SYSERROR("failed to set mode '0%o' to '%s'", | |
679 | s.st_mode, console->name); | |
680 | return -1; | |
681 | } | |
13954cce | 682 | |
63376d7d DL |
683 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
684 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 685 | return -1; |
686 | } | |
687 | ||
63376d7d | 688 | INFO("console has been setup"); |
cd54d859 | 689 | |
6e590161 | 690 | return 0; |
691 | } | |
692 | ||
102a5303 | 693 | static int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 694 | { |
102a5303 DL |
695 | struct lxc_list *iterator; |
696 | struct lxc_cgroup *cg; | |
88329c69 | 697 | int ret = -1; |
6f4a3756 | 698 | |
102a5303 DL |
699 | if (lxc_list_empty(cgroups)) |
700 | return 0; | |
6f4a3756 | 701 | |
102a5303 | 702 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 703 | |
102a5303 | 704 | cg = iterator->elem; |
6f4a3756 | 705 | |
102a5303 | 706 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 707 | goto out; |
6f4a3756 | 708 | |
102a5303 | 709 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 710 | } |
13954cce | 711 | |
88329c69 | 712 | ret = 0; |
cd54d859 | 713 | INFO("cgroup has been setup"); |
88329c69 MN |
714 | out: |
715 | return ret; | |
576f946d | 716 | } |
717 | ||
998ac676 RT |
718 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
719 | { | |
720 | struct mount_opt *mo; | |
721 | ||
722 | /* If opt is found in mount_opt, set or clear flags. | |
723 | * Otherwise append it to data. */ | |
724 | ||
725 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
726 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
727 | if (mo->clear) | |
728 | *flags &= ~mo->flag; | |
729 | else | |
730 | *flags |= mo->flag; | |
731 | return; | |
732 | } | |
733 | } | |
734 | ||
735 | if (strlen(*data)) | |
736 | strcat(*data, ","); | |
737 | strcat(*data, opt); | |
738 | } | |
739 | ||
740 | static int parse_mntopts(struct mntent *mntent, unsigned long *mntflags, | |
741 | char **mntdata) | |
742 | { | |
743 | char *s, *data; | |
744 | char *p, *saveptr = NULL; | |
745 | ||
746 | if (!mntent->mnt_opts) | |
747 | return 0; | |
748 | ||
749 | s = strdup(mntent->mnt_opts); | |
750 | if (!s) { | |
36eb9bde | 751 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
752 | return -1; |
753 | } | |
754 | ||
755 | data = malloc(strlen(s) + 1); | |
756 | if (!data) { | |
36eb9bde | 757 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
758 | free(s); |
759 | return -1; | |
760 | } | |
761 | *data = 0; | |
762 | ||
763 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
764 | p = strtok_r(NULL, ",", &saveptr)) | |
765 | parse_mntopt(p, mntflags, &data); | |
766 | ||
767 | if (*data) | |
768 | *mntdata = data; | |
769 | else | |
770 | free(data); | |
771 | free(s); | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
e7938e9e | 776 | static int mount_file_entries(FILE *file) |
0ad19a3f | 777 | { |
0ad19a3f | 778 | struct mntent *mntent; |
0ad19a3f | 779 | int ret = -1; |
998ac676 RT |
780 | unsigned long mntflags; |
781 | char *mntdata; | |
0ad19a3f | 782 | |
998ac676 | 783 | while ((mntent = getmntent(file))) { |
1bc60a65 | 784 | |
998ac676 RT |
785 | mntflags = 0; |
786 | mntdata = NULL; | |
787 | if (parse_mntopts(mntent, &mntflags, &mntdata) < 0) { | |
36eb9bde | 788 | ERROR("failed to parse mount option '%s'", |
998ac676 RT |
789 | mntent->mnt_opts); |
790 | goto out; | |
791 | } | |
0ad19a3f | 792 | |
793 | if (mount(mntent->mnt_fsname, mntent->mnt_dir, | |
998ac676 | 794 | mntent->mnt_type, mntflags, mntdata)) { |
36eb9bde | 795 | SYSERROR("failed to mount '%s' on '%s'", |
0ad19a3f | 796 | mntent->mnt_fsname, mntent->mnt_dir); |
797 | goto out; | |
798 | } | |
998ac676 | 799 | |
cd54d859 DL |
800 | DEBUG("mounted %s on %s, type %s", mntent->mnt_fsname, |
801 | mntent->mnt_dir, mntent->mnt_type); | |
802 | ||
998ac676 | 803 | free(mntdata); |
0ad19a3f | 804 | } |
cd54d859 | 805 | |
0ad19a3f | 806 | ret = 0; |
cd54d859 DL |
807 | |
808 | INFO("mount points have been setup"); | |
0ad19a3f | 809 | out: |
e7938e9e MN |
810 | return ret; |
811 | } | |
812 | ||
813 | static int setup_mount(const char *fstab) | |
814 | { | |
815 | FILE *file; | |
816 | int ret; | |
817 | ||
818 | if (!fstab) | |
819 | return 0; | |
820 | ||
821 | file = setmntent(fstab, "r"); | |
822 | if (!file) { | |
823 | SYSERROR("failed to use '%s'", fstab); | |
824 | return -1; | |
825 | } | |
826 | ||
827 | ret = mount_file_entries(file); | |
828 | ||
0ad19a3f | 829 | endmntent(file); |
830 | return ret; | |
831 | } | |
832 | ||
e7938e9e MN |
833 | static int setup_mount_entries(struct lxc_list *mount) |
834 | { | |
835 | FILE *file; | |
836 | struct lxc_list *iterator; | |
837 | char *mount_entry; | |
838 | int ret; | |
839 | ||
840 | file = tmpfile(); | |
841 | if (!file) { | |
842 | ERROR("tmpfile error: %m"); | |
843 | return -1; | |
844 | } | |
845 | ||
846 | lxc_list_for_each(iterator, mount) { | |
847 | mount_entry = iterator->elem; | |
1d6b1976 | 848 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
849 | } |
850 | ||
851 | rewind(file); | |
852 | ||
853 | ret = mount_file_entries(file); | |
854 | ||
855 | fclose(file); | |
856 | return ret; | |
857 | } | |
858 | ||
81810dd1 DL |
859 | static int setup_caps(struct lxc_list *caps) |
860 | { | |
861 | struct lxc_list *iterator; | |
862 | char *drop_entry; | |
863 | int i, capid; | |
864 | ||
865 | lxc_list_for_each(iterator, caps) { | |
866 | ||
867 | drop_entry = iterator->elem; | |
868 | ||
869 | capid = -1; | |
870 | ||
871 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
872 | ||
873 | if (strcmp(drop_entry, caps_opt[i].name)) | |
874 | continue; | |
875 | ||
876 | capid = caps_opt[i].value; | |
877 | break; | |
878 | } | |
879 | ||
880 | if (capid < 0) { | |
1e11be34 DL |
881 | ERROR("unknown capability %s", drop_entry); |
882 | return -1; | |
81810dd1 DL |
883 | } |
884 | ||
885 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
886 | ||
887 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
888 | SYSERROR("failed to remove %s capability", drop_entry); | |
889 | return -1; | |
890 | } | |
891 | ||
892 | } | |
893 | ||
894 | DEBUG("capabilities has been setup"); | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
0ad19a3f | 899 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
900 | { | |
901 | struct sockaddr sockaddr; | |
902 | struct ifreq ifr; | |
903 | int ret, fd; | |
904 | ||
3cfc0f3a MN |
905 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
906 | if (ret) { | |
907 | ERROR("mac address '%s' conversion failed : %s", | |
908 | hwaddr, strerror(-ret)); | |
0ad19a3f | 909 | return -1; |
910 | } | |
911 | ||
912 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
913 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
914 | ||
915 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
916 | if (fd < 0) { | |
3ab87b66 | 917 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 918 | return -1; |
919 | } | |
920 | ||
921 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
922 | close(fd); | |
923 | if (ret) | |
3ab87b66 | 924 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 925 | |
cd54d859 DL |
926 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
927 | ||
0ad19a3f | 928 | return ret; |
929 | } | |
930 | ||
82d5ae15 | 931 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 932 | { |
82d5ae15 DL |
933 | struct lxc_list *iterator; |
934 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 935 | int err; |
0ad19a3f | 936 | |
82d5ae15 DL |
937 | lxc_list_for_each(iterator, ip) { |
938 | ||
939 | inetdev = iterator->elem; | |
940 | ||
0093bb8c DL |
941 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
942 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
943 | if (err) { |
944 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
945 | ifindex, strerror(-err)); | |
82d5ae15 DL |
946 | return -1; |
947 | } | |
948 | } | |
949 | ||
950 | return 0; | |
0ad19a3f | 951 | } |
952 | ||
82d5ae15 | 953 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 954 | { |
82d5ae15 | 955 | struct lxc_list *iterator; |
7fa9074f | 956 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 957 | int err; |
0ad19a3f | 958 | |
82d5ae15 DL |
959 | lxc_list_for_each(iterator, ip) { |
960 | ||
961 | inet6dev = iterator->elem; | |
962 | ||
0093bb8c DL |
963 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
964 | &inet6dev->mcast, &inet6dev->acast, | |
965 | inet6dev->prefix); | |
3cfc0f3a MN |
966 | if (err) { |
967 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
968 | ifindex, strerror(-err)); | |
82d5ae15 | 969 | return -1; |
3cfc0f3a | 970 | } |
82d5ae15 DL |
971 | } |
972 | ||
973 | return 0; | |
0ad19a3f | 974 | } |
975 | ||
82d5ae15 | 976 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 977 | { |
0ad19a3f | 978 | char ifname[IFNAMSIZ]; |
0ad19a3f | 979 | char *current_ifname = ifname; |
3cfc0f3a | 980 | int err; |
0ad19a3f | 981 | |
82d5ae15 DL |
982 | /* empty network namespace */ |
983 | if (!netdev->ifindex) { | |
984 | if (netdev->flags | IFF_UP) { | |
3cfc0f3a MN |
985 | err = lxc_device_up("lo"); |
986 | if (err) { | |
987 | ERROR("failed to set the loopback up : %s", | |
988 | strerror(-err)); | |
82d5ae15 DL |
989 | return -1; |
990 | } | |
991 | return 0; | |
992 | } | |
0ad19a3f | 993 | } |
13954cce | 994 | |
82d5ae15 DL |
995 | /* retrieve the name of the interface */ |
996 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 997 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 998 | netdev->ifindex); |
0ad19a3f | 999 | return -1; |
1000 | } | |
13954cce | 1001 | |
018ef520 | 1002 | /* default: let the system to choose one interface name */ |
9d083402 MT |
1003 | if (!netdev->name) |
1004 | netdev->name = "eth%d"; | |
018ef520 | 1005 | |
82d5ae15 | 1006 | /* rename the interface name */ |
3cfc0f3a MN |
1007 | err = lxc_device_rename(ifname, netdev->name); |
1008 | if (err) { | |
1009 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1010 | strerror(-err)); | |
018ef520 DL |
1011 | return -1; |
1012 | } | |
1013 | ||
1014 | /* Re-read the name of the interface because its name has changed | |
1015 | * and would be automatically allocated by the system | |
1016 | */ | |
82d5ae15 | 1017 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1018 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1019 | netdev->ifindex); |
018ef520 | 1020 | return -1; |
0ad19a3f | 1021 | } |
1022 | ||
82d5ae15 DL |
1023 | /* set a mac address */ |
1024 | if (netdev->hwaddr) { | |
1025 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1026 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1027 | current_ifname); |
0ad19a3f | 1028 | return -1; |
1029 | } | |
1030 | } | |
1031 | ||
82d5ae15 DL |
1032 | /* setup ipv4 addresses on the interface */ |
1033 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1034 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1035 | ifname); |
1036 | return -1; | |
1037 | } | |
1038 | ||
82d5ae15 DL |
1039 | /* setup ipv6 addresses on the interface */ |
1040 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1041 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1042 | ifname); |
1043 | return -1; | |
1044 | } | |
1045 | ||
82d5ae15 DL |
1046 | /* set the network device up */ |
1047 | if (netdev->flags | IFF_UP) { | |
3cfc0f3a MN |
1048 | int err; |
1049 | ||
1050 | err = lxc_device_up(current_ifname); | |
1051 | if (err) { | |
1052 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1053 | strerror(-err)); | |
0ad19a3f | 1054 | return -1; |
1055 | } | |
1056 | ||
1057 | /* the network is up, make the loopback up too */ | |
3cfc0f3a MN |
1058 | err = lxc_device_up("lo"); |
1059 | if (err) { | |
1060 | ERROR("failed to set the loopback up : %s", | |
1061 | strerror(-err)); | |
0ad19a3f | 1062 | return -1; |
1063 | } | |
1064 | } | |
1065 | ||
cd54d859 DL |
1066 | DEBUG("'%s' has been setup", current_ifname); |
1067 | ||
0ad19a3f | 1068 | return 0; |
1069 | } | |
1070 | ||
5f4535a3 | 1071 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1072 | { |
82d5ae15 | 1073 | struct lxc_list *iterator; |
82d5ae15 | 1074 | struct lxc_netdev *netdev; |
0ad19a3f | 1075 | |
5f4535a3 | 1076 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1077 | |
5f4535a3 | 1078 | netdev = iterator->elem; |
82d5ae15 DL |
1079 | |
1080 | if (setup_netdev(netdev)) { | |
1081 | ERROR("failed to setup netdev"); | |
1082 | return -1; | |
1083 | } | |
1084 | } | |
cd54d859 | 1085 | |
5f4535a3 DL |
1086 | if (!lxc_list_empty(network)) |
1087 | INFO("network has been setup"); | |
cd54d859 DL |
1088 | |
1089 | return 0; | |
0ad19a3f | 1090 | } |
1091 | ||
7b379ab3 | 1092 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 1093 | { |
7b379ab3 MN |
1094 | struct lxc_conf *new; |
1095 | ||
1096 | new = malloc(sizeof(*new)); | |
1097 | if (!new) { | |
1098 | ERROR("lxc_conf_init : %m"); | |
1099 | return NULL; | |
1100 | } | |
1101 | memset(new, 0, sizeof(*new)); | |
1102 | ||
28a4b0e5 | 1103 | new->console.path = NULL; |
63376d7d DL |
1104 | new->console.peer = -1; |
1105 | new->console.master = -1; | |
1106 | new->console.slave = -1; | |
1107 | new->console.name[0] = '\0'; | |
7b379ab3 MN |
1108 | lxc_list_init(&new->cgroup); |
1109 | lxc_list_init(&new->network); | |
1110 | lxc_list_init(&new->mount_list); | |
81810dd1 | 1111 | lxc_list_init(&new->caps); |
7b379ab3 MN |
1112 | |
1113 | return new; | |
089cd8b8 DL |
1114 | } |
1115 | ||
82d5ae15 | 1116 | static int instanciate_veth(struct lxc_netdev *netdev) |
0ad19a3f | 1117 | { |
8634bc19 | 1118 | char veth1buf[IFNAMSIZ], *veth1; |
82d5ae15 | 1119 | char veth2[IFNAMSIZ]; |
3cfc0f3a | 1120 | int err; |
13954cce | 1121 | |
e892973e DL |
1122 | if (netdev->priv.veth_attr.pair) |
1123 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 MT |
1124 | else { |
1125 | snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
1126 | mktemp(veth1buf); | |
1127 | veth1 = veth1buf; | |
1128 | } | |
82d5ae15 | 1129 | |
8634bc19 | 1130 | snprintf(veth2, sizeof(veth2), "vethXXXXXX"); |
82d5ae15 DL |
1131 | mktemp(veth2); |
1132 | ||
1133 | if (!strlen(veth1) || !strlen(veth2)) { | |
1134 | ERROR("failed to allocate a temporary name"); | |
1135 | return -1; | |
0ad19a3f | 1136 | } |
1137 | ||
3cfc0f3a MN |
1138 | err = lxc_veth_create(veth1, veth2); |
1139 | if (err) { | |
1140 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
1141 | strerror(-err)); | |
6ab9ab6d | 1142 | return -1; |
0ad19a3f | 1143 | } |
13954cce | 1144 | |
82d5ae15 | 1145 | if (netdev->mtu) { |
3cfc0f3a MN |
1146 | err = lxc_device_set_mtu(veth1, atoi(netdev->mtu)); |
1147 | if (!err) | |
1148 | err = lxc_device_set_mtu(veth2, atoi(netdev->mtu)); | |
1149 | if (err) { | |
1150 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
1151 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 1152 | goto out_delete; |
75d09f83 DL |
1153 | } |
1154 | } | |
1155 | ||
3cfc0f3a MN |
1156 | if (netdev->link) { |
1157 | err = lxc_bridge_attach(netdev->link, veth1); | |
1158 | if (err) { | |
1159 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
1160 | veth1, netdev->link, strerror(-err)); | |
1161 | goto out_delete; | |
1162 | } | |
eb14c10a DL |
1163 | } |
1164 | ||
82d5ae15 DL |
1165 | netdev->ifindex = if_nametoindex(veth2); |
1166 | if (!netdev->ifindex) { | |
36eb9bde | 1167 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
1168 | goto out_delete; |
1169 | } | |
1170 | ||
82d5ae15 | 1171 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1172 | err = lxc_device_up(veth1); |
1173 | if (err) { | |
1174 | ERROR("failed to set %s up : %s", veth1, | |
1175 | strerror(-err)); | |
eb14c10a | 1176 | goto out_delete; |
0ad19a3f | 1177 | } |
1178 | } | |
1179 | ||
82d5ae15 DL |
1180 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
1181 | veth1, veth2, netdev->ifindex); | |
1182 | ||
6ab9ab6d | 1183 | return 0; |
eb14c10a DL |
1184 | |
1185 | out_delete: | |
1186 | lxc_device_delete(veth1); | |
6ab9ab6d | 1187 | return -1; |
13954cce | 1188 | } |
d957ae2d | 1189 | |
82d5ae15 | 1190 | static int instanciate_macvlan(struct lxc_netdev *netdev) |
0ad19a3f | 1191 | { |
82d5ae15 | 1192 | char peer[IFNAMSIZ]; |
3cfc0f3a | 1193 | int err; |
d957ae2d MT |
1194 | |
1195 | if (!netdev->link) { | |
1196 | ERROR("no link specified for macvlan netdev"); | |
1197 | return -1; | |
1198 | } | |
13954cce | 1199 | |
82d5ae15 | 1200 | snprintf(peer, sizeof(peer), "mcXXXXXX"); |
22ebac19 | 1201 | |
82d5ae15 DL |
1202 | mktemp(peer); |
1203 | ||
1204 | if (!strlen(peer)) { | |
1205 | ERROR("failed to make a temporary name"); | |
1206 | return -1; | |
0ad19a3f | 1207 | } |
1208 | ||
3cfc0f3a MN |
1209 | err = lxc_macvlan_create(netdev->link, peer, |
1210 | netdev->priv.macvlan_attr.mode); | |
1211 | if (err) { | |
1212 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
1213 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 1214 | return -1; |
0ad19a3f | 1215 | } |
1216 | ||
82d5ae15 DL |
1217 | netdev->ifindex = if_nametoindex(peer); |
1218 | if (!netdev->ifindex) { | |
36eb9bde | 1219 | ERROR("failed to retrieve the index for %s", peer); |
d957ae2d MT |
1220 | lxc_device_delete(peer); |
1221 | return -1; | |
22ebac19 | 1222 | } |
1223 | ||
e892973e DL |
1224 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
1225 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 1226 | |
d957ae2d | 1227 | return 0; |
0ad19a3f | 1228 | } |
1229 | ||
26c39028 JHS |
1230 | /* XXX: merge with instanciate_macvlan */ |
1231 | static int instanciate_vlan(struct lxc_netdev *netdev) | |
1232 | { | |
1233 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 1234 | int err; |
26c39028 JHS |
1235 | |
1236 | if (!netdev->link) { | |
1237 | ERROR("no link specified for vlan netdev"); | |
1238 | return -1; | |
1239 | } | |
1240 | ||
e892973e | 1241 | snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
26c39028 | 1242 | |
3cfc0f3a MN |
1243 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
1244 | if (err) { | |
1245 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
1246 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
1247 | return -1; |
1248 | } | |
1249 | ||
1250 | netdev->ifindex = if_nametoindex(peer); | |
1251 | if (!netdev->ifindex) { | |
1252 | ERROR("failed to retrieve the ifindex for %s", peer); | |
1253 | lxc_device_delete(peer); | |
1254 | return -1; | |
1255 | } | |
1256 | ||
e892973e DL |
1257 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
1258 | netdev->ifindex); | |
1259 | ||
26c39028 JHS |
1260 | return 0; |
1261 | } | |
1262 | ||
82d5ae15 | 1263 | static int instanciate_phys(struct lxc_netdev *netdev) |
0ad19a3f | 1264 | { |
9d083402 | 1265 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 1266 | if (!netdev->ifindex) { |
9d083402 | 1267 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 1268 | return -1; |
1269 | } | |
1270 | ||
82d5ae15 | 1271 | return 0; |
0ad19a3f | 1272 | } |
1273 | ||
82d5ae15 | 1274 | static int instanciate_empty(struct lxc_netdev *netdev) |
0ad19a3f | 1275 | { |
82d5ae15 DL |
1276 | netdev->ifindex = 0; |
1277 | return 0; | |
0ad19a3f | 1278 | } |
1279 | ||
5f4535a3 | 1280 | int lxc_create_network(struct lxc_list *network) |
0ad19a3f | 1281 | { |
82d5ae15 | 1282 | struct lxc_list *iterator; |
82d5ae15 | 1283 | struct lxc_netdev *netdev; |
0ad19a3f | 1284 | |
5f4535a3 | 1285 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 1286 | |
5f4535a3 | 1287 | netdev = iterator->elem; |
13954cce | 1288 | |
24654103 | 1289 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 1290 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 1291 | netdev->type); |
82d5ae15 DL |
1292 | return -1; |
1293 | } | |
0ad19a3f | 1294 | |
5f4535a3 | 1295 | if (netdev_conf[netdev->type](netdev)) { |
82d5ae15 DL |
1296 | ERROR("failed to create netdev"); |
1297 | return -1; | |
1298 | } | |
0ad19a3f | 1299 | } |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
7fef7a06 DL |
1304 | void lxc_delete_network(struct lxc_list *network) |
1305 | { | |
1306 | struct lxc_list *iterator; | |
1307 | struct lxc_netdev *netdev; | |
1308 | ||
1309 | lxc_list_for_each(iterator, network) { | |
1310 | netdev = iterator->elem; | |
1311 | if (netdev->ifindex > 0) | |
1312 | lxc_device_delete_index(netdev->ifindex); | |
1313 | } | |
1314 | } | |
1315 | ||
5f4535a3 | 1316 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 1317 | { |
82d5ae15 | 1318 | struct lxc_list *iterator; |
82d5ae15 | 1319 | struct lxc_netdev *netdev; |
3cfc0f3a | 1320 | int err; |
0ad19a3f | 1321 | |
5f4535a3 | 1322 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 1323 | |
5f4535a3 | 1324 | netdev = iterator->elem; |
82d5ae15 | 1325 | |
236087a6 DL |
1326 | /* empty network namespace, nothing to move */ |
1327 | if (!netdev->ifindex) | |
1328 | continue; | |
1329 | ||
3cfc0f3a MN |
1330 | err = lxc_device_move(netdev->ifindex, pid); |
1331 | if (err) { | |
1332 | ERROR("failed to move '%s' to the container : %s", | |
1333 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
1334 | return -1; |
1335 | } | |
1336 | ||
9d083402 | 1337 | DEBUG("move '%s' to '%d'", netdev->link, pid); |
0ad19a3f | 1338 | } |
1339 | ||
1340 | return 0; | |
1341 | } | |
1342 | ||
5e4a62bf | 1343 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 1344 | { |
5e4a62bf | 1345 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 1346 | int i; |
b0a33c1e | 1347 | |
5e4a62bf DL |
1348 | /* no tty in the configuration */ |
1349 | if (!conf->tty) | |
b0a33c1e | 1350 | return 0; |
1351 | ||
13954cce | 1352 | tty_info->pty_info = |
e4e7d59d | 1353 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 1354 | if (!tty_info->pty_info) { |
36eb9bde | 1355 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 1356 | return -1; |
b0a33c1e | 1357 | } |
1358 | ||
985d15b1 | 1359 | for (i = 0; i < conf->tty; i++) { |
13954cce | 1360 | |
b0a33c1e | 1361 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
1362 | ||
13954cce | 1363 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 1364 | pty_info->name, NULL, NULL)) { |
36eb9bde | 1365 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
1366 | tty_info->nbtty = i; |
1367 | lxc_delete_tty(tty_info); | |
1368 | return -1; | |
b0a33c1e | 1369 | } |
1370 | ||
5332bb84 DL |
1371 | DEBUG("allocated pty '%s' (%d/%d)", |
1372 | pty_info->name, pty_info->master, pty_info->slave); | |
1373 | ||
b035ad62 MS |
1374 | /* Prevent leaking the file descriptors to the container */ |
1375 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
1376 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
1377 | ||
b0a33c1e | 1378 | pty_info->busy = 0; |
1379 | } | |
1380 | ||
985d15b1 | 1381 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
1382 | |
1383 | INFO("tty's configured"); | |
1384 | ||
985d15b1 | 1385 | return 0; |
b0a33c1e | 1386 | } |
1387 | ||
1388 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
1389 | { | |
1390 | int i; | |
1391 | ||
1392 | for (i = 0; i < tty_info->nbtty; i++) { | |
1393 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
1394 | ||
1395 | close(pty_info->master); | |
1396 | close(pty_info->slave); | |
1397 | } | |
1398 | ||
1399 | free(tty_info->pty_info); | |
1400 | tty_info->nbtty = 0; | |
1401 | } | |
1402 | ||
571e6ec8 | 1403 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 1404 | { |
571e6ec8 | 1405 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 1406 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 1407 | return -1; |
0ad19a3f | 1408 | } |
1409 | ||
5f4535a3 | 1410 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 1411 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 1412 | return -1; |
0ad19a3f | 1413 | } |
1414 | ||
571e6ec8 | 1415 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
36eb9bde | 1416 | ERROR("failed to setup the cgroups for '%s'", name); |
95b5ffaf | 1417 | return -1; |
0ad19a3f | 1418 | } |
1419 | ||
571e6ec8 | 1420 | if (setup_mount(lxc_conf->fstab)) { |
36eb9bde | 1421 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 1422 | return -1; |
576f946d | 1423 | } |
1424 | ||
e7938e9e MN |
1425 | if (setup_mount_entries(&lxc_conf->mount_list)) { |
1426 | ERROR("failed to setup the mount entries for '%s'", name); | |
1427 | return -1; | |
1428 | } | |
1429 | ||
33fcb7a0 | 1430 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console)) { |
36eb9bde | 1431 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 1432 | return -1; |
6e590161 | 1433 | } |
1434 | ||
33fcb7a0 | 1435 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info)) { |
36eb9bde | 1436 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 1437 | return -1; |
b0a33c1e | 1438 | } |
1439 | ||
33fcb7a0 | 1440 | if (setup_rootfs(&lxc_conf->rootfs)) { |
36eb9bde | 1441 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 1442 | return -1; |
ed502555 | 1443 | } |
1444 | ||
571e6ec8 | 1445 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 1446 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 1447 | return -1; |
3c26f34e | 1448 | } |
1449 | ||
81810dd1 DL |
1450 | if (setup_caps(&lxc_conf->caps)) { |
1451 | ERROR("failed to drop capabilities"); | |
1452 | return -1; | |
1453 | } | |
1454 | ||
cd54d859 DL |
1455 | NOTICE("'%s' is setup.", name); |
1456 | ||
0ad19a3f | 1457 | return 0; |
1458 | } |