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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 }, | |
9527e566 | 173 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 174 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
175 | #endif |
176 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 177 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 178 | #endif |
81810dd1 DL |
179 | { "setfcap", CAP_SETFCAP }, |
180 | { "mac_override", CAP_MAC_OVERRIDE }, | |
181 | { "mac_admin", CAP_MAC_ADMIN }, | |
81810dd1 DL |
182 | }; |
183 | ||
5045eedf | 184 | #if 0 /* will be reactivated with image mounting support */ |
7a7ff0c6 | 185 | static int configure_find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 186 | { |
187 | struct cbarg { | |
188 | const char *rootfs; | |
189 | const char *testdir; | |
190 | char *fstype; | |
191 | int mntopt; | |
192 | } *cbarg = data; | |
193 | ||
194 | char *fstype; | |
195 | ||
196 | /* we don't try 'nodev' entries */ | |
197 | if (strstr(buffer, "nodev")) | |
198 | return 0; | |
199 | ||
200 | fstype = buffer; | |
b2718c72 | 201 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
202 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 203 | |
204 | if (mount(cbarg->rootfs, cbarg->testdir, fstype, cbarg->mntopt, NULL)) | |
205 | return 0; | |
206 | ||
207 | /* found ! */ | |
208 | umount(cbarg->testdir); | |
209 | strcpy(cbarg->fstype, fstype); | |
210 | ||
211 | return 1; | |
212 | } | |
213 | ||
214 | /* find the filesystem type with brute force */ | |
215 | static int configure_find_fstype(const char *rootfs, char *fstype, int mntopt) | |
216 | { | |
217 | int i, found; | |
78ae2fcc | 218 | |
219 | struct cbarg { | |
220 | const char *rootfs; | |
221 | const char *testdir; | |
222 | char *fstype; | |
223 | int mntopt; | |
224 | } cbarg = { | |
225 | .rootfs = rootfs, | |
226 | .fstype = fstype, | |
227 | .mntopt = mntopt, | |
228 | }; | |
229 | ||
230 | /* first we check with /etc/filesystems, in case the modules | |
231 | * are auto-loaded and fall back to the supported kernel fs | |
232 | */ | |
233 | char *fsfile[] = { | |
234 | "/etc/filesystems", | |
235 | "/proc/filesystems", | |
236 | }; | |
237 | ||
238 | cbarg.testdir = tempnam("/tmp", "lxc-"); | |
239 | if (!cbarg.testdir) { | |
36eb9bde | 240 | SYSERROR("failed to build a temp name"); |
78ae2fcc | 241 | return -1; |
242 | } | |
243 | ||
244 | if (mkdir(cbarg.testdir, 0755)) { | |
36eb9bde | 245 | SYSERROR("failed to create temporary directory"); |
78ae2fcc | 246 | return -1; |
247 | } | |
248 | ||
249 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { | |
250 | ||
b2718c72 | 251 | found = lxc_file_for_each_line(fsfile[i], |
252 | configure_find_fstype_cb, | |
2382ecff | 253 | &cbarg); |
78ae2fcc | 254 | |
255 | if (found < 0) { | |
36eb9bde | 256 | SYSERROR("failed to read '%s'", fsfile[i]); |
78ae2fcc | 257 | goto out; |
258 | } | |
259 | ||
260 | if (found) | |
261 | break; | |
262 | } | |
263 | ||
264 | if (!found) { | |
36eb9bde | 265 | ERROR("failed to determine fs type for '%s'", rootfs); |
78ae2fcc | 266 | goto out; |
267 | } | |
268 | ||
269 | out: | |
270 | rmdir(cbarg.testdir); | |
271 | return found - 1; | |
272 | } | |
273 | ||
274 | static int configure_rootfs_dir_cb(const char *rootfs, const char *absrootfs, | |
275 | FILE *f) | |
276 | { | |
fdc03323 | 277 | return fprintf(f, "%s %s none rbind 0 0\n", absrootfs, rootfs); |
78ae2fcc | 278 | } |
279 | ||
280 | static int configure_rootfs_blk_cb(const char *rootfs, const char *absrootfs, | |
281 | FILE *f) | |
282 | { | |
283 | char fstype[MAXPATHLEN]; | |
284 | ||
285 | if (configure_find_fstype(absrootfs, fstype, 0)) { | |
36eb9bde | 286 | ERROR("failed to configure mount for block device '%s'", |
78ae2fcc | 287 | absrootfs); |
288 | return -1; | |
289 | } | |
290 | ||
291 | return fprintf(f, "%s %s %s defaults 0 0\n", absrootfs, rootfs, fstype); | |
292 | } | |
293 | ||
eae6543d | 294 | static int configure_rootfs(const char *name, const char *rootfs) |
0ad19a3f | 295 | { |
296 | char path[MAXPATHLEN]; | |
b09ef133 | 297 | char absrootfs[MAXPATHLEN]; |
9b0f0477 | 298 | char fstab[MAXPATHLEN]; |
78ae2fcc | 299 | struct stat s; |
9b0f0477 | 300 | FILE *f; |
78ae2fcc | 301 | int i, ret; |
302 | ||
303 | typedef int (*rootfs_cb)(const char *, const char *, FILE *); | |
304 | ||
305 | struct rootfs_type { | |
306 | int type; | |
307 | rootfs_cb cb; | |
308 | } rtfs_type[] = { | |
309 | { __S_IFDIR, configure_rootfs_dir_cb }, | |
310 | { __S_IFBLK, configure_rootfs_blk_cb }, | |
311 | }; | |
0ad19a3f | 312 | |
4c8ab83b | 313 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 314 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 315 | return -1; |
316 | } | |
b09ef133 | 317 | |
4c8ab83b | 318 | snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs", name); |
b09ef133 | 319 | |
78ae2fcc | 320 | if (mkdir(path, 0755)) { |
36eb9bde | 321 | SYSERROR("failed to create the '%s' directory", path); |
78ae2fcc | 322 | return -1; |
323 | } | |
324 | ||
b09ef133 | 325 | if (access(absrootfs, F_OK)) { |
36eb9bde | 326 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 327 | return -1; |
328 | } | |
329 | ||
78ae2fcc | 330 | if (stat(absrootfs, &s)) { |
36eb9bde | 331 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 332 | return -1; |
333 | } | |
334 | ||
78ae2fcc | 335 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 336 | |
78ae2fcc | 337 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
338 | continue; | |
9b0f0477 | 339 | |
78ae2fcc | 340 | snprintf(fstab, MAXPATHLEN, LXCPATH "/%s/fstab", name); |
4c8ab83b | 341 | |
78ae2fcc | 342 | f = fopen(fstab, "a+"); |
343 | if (!f) { | |
36eb9bde | 344 | SYSERROR("failed to open fstab file"); |
78ae2fcc | 345 | return -1; |
346 | } | |
9b0f0477 | 347 | |
78ae2fcc | 348 | ret = rtfs_type[i].cb(path, absrootfs, f); |
9b0f0477 | 349 | |
78ae2fcc | 350 | fclose(f); |
351 | ||
352 | if (ret < 0) { | |
36eb9bde | 353 | ERROR("failed to add rootfs mount in fstab"); |
78ae2fcc | 354 | return -1; |
355 | } | |
356 | ||
357 | snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs/rootfs", name); | |
358 | ||
359 | return symlink(absrootfs, path); | |
360 | } | |
9b0f0477 | 361 | |
36eb9bde | 362 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 363 | return -1; |
0ad19a3f | 364 | } |
5045eedf | 365 | #endif |
0ad19a3f | 366 | |
4e5440c6 | 367 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 368 | { |
4e5440c6 DL |
369 | if (!utsname) |
370 | return 0; | |
0ad19a3f | 371 | |
4e5440c6 DL |
372 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
373 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 374 | return -1; |
375 | } | |
376 | ||
4e5440c6 | 377 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 378 | |
0ad19a3f | 379 | return 0; |
380 | } | |
381 | ||
33fcb7a0 DL |
382 | static int setup_tty(const struct lxc_rootfs *rootfs, |
383 | const struct lxc_tty_info *tty_info) | |
b0a33c1e | 384 | { |
385 | char path[MAXPATHLEN]; | |
386 | int i; | |
387 | ||
388 | for (i = 0; i < tty_info->nbtty; i++) { | |
389 | ||
390 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
391 | ||
52e35957 | 392 | snprintf(path, sizeof(path), "%s/dev/tty%d", |
33fcb7a0 | 393 | rootfs->path ? rootfs->path : "", i + 1); |
b0a33c1e | 394 | |
13954cce | 395 | /* At this point I can not use the "access" function |
b0a33c1e | 396 | * to check the file is present or not because it fails |
397 | * with EACCES errno and I don't know why :( */ | |
13954cce | 398 | |
b0a33c1e | 399 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
36eb9bde | 400 | WARN("failed to mount '%s'->'%s'", |
52e35957 | 401 | pty_info->name, path); |
b0a33c1e | 402 | continue; |
403 | } | |
404 | } | |
405 | ||
cd54d859 DL |
406 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
407 | ||
b0a33c1e | 408 | return 0; |
409 | } | |
410 | ||
7a7ff0c6 | 411 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
412 | { |
413 | struct lxc_list *mountlist, *listentry, *iterator; | |
414 | char *pivotdir, *mountpoint, *mountentry; | |
415 | int found; | |
416 | void **cbparm; | |
417 | ||
418 | mountentry = buffer; | |
419 | cbparm = (void **)data; | |
420 | ||
421 | mountlist = cbparm[0]; | |
422 | pivotdir = cbparm[1]; | |
423 | ||
424 | /* parse entry, first field is mountname, ignore */ | |
425 | mountpoint = strtok(mountentry, " "); | |
426 | if (!mountpoint) | |
427 | return -1; | |
428 | ||
429 | /* second field is mountpoint */ | |
430 | mountpoint = strtok(NULL, " "); | |
431 | if (!mountpoint) | |
432 | return -1; | |
433 | ||
434 | /* only consider mountpoints below old root fs */ | |
435 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
436 | return 0; | |
437 | ||
438 | /* filter duplicate mountpoints */ | |
439 | found = 0; | |
440 | lxc_list_for_each(iterator, mountlist) { | |
441 | if (!strcmp(iterator->elem, mountpoint)) { | |
442 | found = 1; | |
443 | break; | |
444 | } | |
445 | } | |
446 | if (found) | |
447 | return 0; | |
448 | ||
449 | /* add entry to list */ | |
450 | listentry = malloc(sizeof(*listentry)); | |
451 | if (!listentry) { | |
452 | SYSERROR("malloc for mountpoint listentry failed"); | |
453 | return -1; | |
454 | } | |
455 | ||
456 | listentry->elem = strdup(mountpoint); | |
457 | if (!listentry->elem) { | |
458 | SYSERROR("strdup failed"); | |
459 | return -1; | |
460 | } | |
461 | lxc_list_add_tail(mountlist, listentry); | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
cc6f6dd7 | 466 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 467 | { |
2382ecff | 468 | char path[MAXPATHLEN]; |
bf601689 MH |
469 | void *cbparm[2]; |
470 | struct lxc_list mountlist, *iterator; | |
471 | int ok, still_mounted, last_still_mounted; | |
bf601689 MH |
472 | |
473 | /* read and parse /proc/mounts in old root fs */ | |
474 | lxc_list_init(&mountlist); | |
475 | ||
cc6f6dd7 DL |
476 | /* oldrootfs is on the top tree directory now */ |
477 | snprintf(path, sizeof(path), "/%s", oldrootfs); | |
bf601689 | 478 | cbparm[0] = &mountlist; |
bf601689 | 479 | |
cc6f6dd7 | 480 | cbparm[1] = strdup(path); |
bf601689 MH |
481 | if (!cbparm[1]) { |
482 | SYSERROR("strdup failed"); | |
483 | return -1; | |
484 | } | |
485 | ||
cc6f6dd7 DL |
486 | snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
487 | ||
488 | ok = lxc_file_for_each_line(path, | |
489 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
490 | if (ok < 0) { |
491 | SYSERROR("failed to read or parse mount list '%s'", path); | |
492 | return -1; | |
493 | } | |
494 | ||
495 | /* umount filesystems until none left or list no longer shrinks */ | |
496 | still_mounted = 0; | |
497 | do { | |
498 | last_still_mounted = still_mounted; | |
499 | still_mounted = 0; | |
500 | ||
501 | lxc_list_for_each(iterator, &mountlist) { | |
502 | ||
c08556c6 | 503 | /* umount normally */ |
bf601689 MH |
504 | if (!umount(iterator->elem)) { |
505 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
506 | lxc_list_del(iterator); | |
507 | continue; | |
508 | } | |
509 | ||
bf601689 MH |
510 | still_mounted++; |
511 | } | |
7df119ee | 512 | |
bf601689 MH |
513 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
514 | ||
7df119ee | 515 | |
c08556c6 DL |
516 | lxc_list_for_each(iterator, &mountlist) { |
517 | ||
518 | /* let's try a lazy umount */ | |
519 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
520 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
521 | continue; | |
522 | } | |
523 | ||
524 | /* be more brutal (nfs) */ | |
525 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
526 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
527 | continue; | |
528 | } | |
529 | ||
7df119ee | 530 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 531 | } |
bf601689 | 532 | |
cc6f6dd7 DL |
533 | return 0; |
534 | } | |
535 | ||
536 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
537 | { | |
538 | char path[MAXPATHLEN]; | |
539 | int remove_pivotdir = 0; | |
540 | ||
541 | /* change into new root fs */ | |
542 | if (chdir(rootfs)) { | |
543 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
544 | return -1; | |
545 | } | |
546 | ||
547 | if (!pivotdir) | |
3103609d | 548 | pivotdir = "mnt"; |
cc6f6dd7 | 549 | |
4f9293b1 | 550 | /* compute the full path to pivotdir under rootfs */ |
cc6f6dd7 DL |
551 | snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
552 | ||
553 | if (access(path, F_OK)) { | |
554 | ||
555 | if (mkdir_p(path, 0755)) { | |
556 | SYSERROR("failed to create pivotdir '%s'", path); | |
557 | return -1; | |
558 | } | |
559 | ||
560 | remove_pivotdir = 1; | |
561 | DEBUG("created '%s' directory", path); | |
562 | } | |
563 | ||
564 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
565 | ||
566 | /* pivot_root into our new root fs */ | |
567 | if (pivot_root(".", path)) { | |
568 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
569 | return -1; |
570 | } | |
cc6f6dd7 DL |
571 | |
572 | if (chdir("/")) { | |
573 | SYSERROR("can't chdir to / after pivot_root"); | |
574 | return -1; | |
575 | } | |
576 | ||
577 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
578 | ||
579 | /* we switch from absolute path to relative path */ | |
580 | if (umount_oldrootfs(pivotdir)) | |
581 | return -1; | |
bf601689 | 582 | |
c08556c6 DL |
583 | /* remove temporary mount point, we don't consider the removing |
584 | * as fatal */ | |
a91d897a FW |
585 | if (remove_pivotdir && rmdir(pivotdir)) |
586 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 MH |
587 | |
588 | INFO("pivoted to '%s'", rootfs); | |
cc6f6dd7 | 589 | |
bf601689 MH |
590 | return 0; |
591 | } | |
592 | ||
33fcb7a0 | 593 | static int setup_rootfs(const struct lxc_rootfs *rootfs) |
0ad19a3f | 594 | { |
b1789442 | 595 | char *mpath = LXCROOTFSMOUNT; |
0ad19a3f | 596 | |
33fcb7a0 | 597 | if (!rootfs->path) |
c69bd12f | 598 | return 0; |
0ad19a3f | 599 | |
b1789442 DL |
600 | if (rootfs->mount) |
601 | mpath = rootfs->mount; | |
602 | ||
603 | if (access(mpath, F_OK)) { | |
604 | SYSERROR("failed to access to '%s', check it is present", | |
605 | mpath); | |
606 | return -1; | |
607 | } | |
608 | ||
609 | if (mount(rootfs->path, mpath, "none", MS_BIND|MS_REC, NULL)) { | |
610 | SYSERROR("failed to mount '%s'->'%s'", rootfs->path, mpath); | |
c3f0a28c | 611 | return -1; |
612 | } | |
0ad19a3f | 613 | |
b1789442 | 614 | DEBUG("mounted '%s' on '%s'", rootfs->path, mpath); |
c69bd12f | 615 | |
b1789442 | 616 | if (setup_rootfs_pivot_root(mpath, rootfs->pivot)) { |
cc6f6dd7 | 617 | ERROR("failed to setup pivot root"); |
25368b52 | 618 | return -1; |
c69bd12f DL |
619 | } |
620 | ||
25368b52 | 621 | return 0; |
0ad19a3f | 622 | } |
623 | ||
d852c78c | 624 | static int setup_pts(int pts) |
3c26f34e | 625 | { |
d852c78c DL |
626 | if (!pts) |
627 | return 0; | |
3c26f34e | 628 | |
629 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 630 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 631 | return -1; |
632 | } | |
633 | ||
2ac29abe | 634 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, "newinstance,ptmxmode=0666")) { |
36eb9bde | 635 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 636 | return -1; |
637 | } | |
638 | ||
3c26f34e | 639 | if (access("/dev/ptmx", F_OK)) { |
640 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
641 | goto out; | |
36eb9bde | 642 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 643 | return -1; |
644 | } | |
645 | ||
646 | /* fallback here, /dev/pts/ptmx exists just mount bind */ | |
647 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 648 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 649 | return -1; |
650 | } | |
cd54d859 DL |
651 | |
652 | INFO("created new pts instance"); | |
d852c78c | 653 | |
3c26f34e | 654 | out: |
655 | return 0; | |
656 | } | |
657 | ||
33fcb7a0 DL |
658 | static int setup_console(const struct lxc_rootfs *rootfs, |
659 | const struct lxc_console *console) | |
6e590161 | 660 | { |
63376d7d DL |
661 | char path[MAXPATHLEN]; |
662 | struct stat s; | |
52e35957 | 663 | |
63376d7d | 664 | /* We don't have a rootfs, /dev/console will be shared */ |
33fcb7a0 | 665 | if (!rootfs->path) |
63376d7d | 666 | return 0; |
52e35957 | 667 | |
33fcb7a0 | 668 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->path); |
52e35957 | 669 | |
63376d7d DL |
670 | if (access(path, F_OK)) { |
671 | WARN("rootfs specified but no console found"); | |
672 | return 0; | |
52e35957 DL |
673 | } |
674 | ||
f78a1f32 | 675 | if (console->peer == -1) { |
63376d7d | 676 | INFO("no console output required"); |
f78a1f32 DL |
677 | return 0; |
678 | } | |
ed502555 | 679 | |
63376d7d DL |
680 | if (stat(path, &s)) { |
681 | SYSERROR("failed to stat '%s'", path); | |
682 | return -1; | |
683 | } | |
684 | ||
685 | if (chmod(console->name, s.st_mode)) { | |
686 | SYSERROR("failed to set mode '0%o' to '%s'", | |
687 | s.st_mode, console->name); | |
688 | return -1; | |
689 | } | |
13954cce | 690 | |
63376d7d DL |
691 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
692 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 693 | return -1; |
694 | } | |
695 | ||
63376d7d | 696 | INFO("console has been setup"); |
cd54d859 | 697 | |
6e590161 | 698 | return 0; |
699 | } | |
700 | ||
102a5303 | 701 | static int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 702 | { |
102a5303 DL |
703 | struct lxc_list *iterator; |
704 | struct lxc_cgroup *cg; | |
88329c69 | 705 | int ret = -1; |
6f4a3756 | 706 | |
102a5303 DL |
707 | if (lxc_list_empty(cgroups)) |
708 | return 0; | |
6f4a3756 | 709 | |
102a5303 | 710 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 711 | |
102a5303 | 712 | cg = iterator->elem; |
6f4a3756 | 713 | |
102a5303 | 714 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 715 | goto out; |
6f4a3756 | 716 | |
102a5303 | 717 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 718 | } |
13954cce | 719 | |
88329c69 | 720 | ret = 0; |
cd54d859 | 721 | INFO("cgroup has been setup"); |
88329c69 MN |
722 | out: |
723 | return ret; | |
576f946d | 724 | } |
725 | ||
998ac676 RT |
726 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
727 | { | |
728 | struct mount_opt *mo; | |
729 | ||
730 | /* If opt is found in mount_opt, set or clear flags. | |
731 | * Otherwise append it to data. */ | |
732 | ||
733 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
734 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
735 | if (mo->clear) | |
736 | *flags &= ~mo->flag; | |
737 | else | |
738 | *flags |= mo->flag; | |
739 | return; | |
740 | } | |
741 | } | |
742 | ||
743 | if (strlen(*data)) | |
744 | strcat(*data, ","); | |
745 | strcat(*data, opt); | |
746 | } | |
747 | ||
748 | static int parse_mntopts(struct mntent *mntent, unsigned long *mntflags, | |
749 | char **mntdata) | |
750 | { | |
751 | char *s, *data; | |
752 | char *p, *saveptr = NULL; | |
753 | ||
754 | if (!mntent->mnt_opts) | |
755 | return 0; | |
756 | ||
757 | s = strdup(mntent->mnt_opts); | |
758 | if (!s) { | |
36eb9bde | 759 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
760 | return -1; |
761 | } | |
762 | ||
763 | data = malloc(strlen(s) + 1); | |
764 | if (!data) { | |
36eb9bde | 765 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
766 | free(s); |
767 | return -1; | |
768 | } | |
769 | *data = 0; | |
770 | ||
771 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
772 | p = strtok_r(NULL, ",", &saveptr)) | |
773 | parse_mntopt(p, mntflags, &data); | |
774 | ||
775 | if (*data) | |
776 | *mntdata = data; | |
777 | else | |
778 | free(data); | |
779 | free(s); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
e7938e9e | 784 | static int mount_file_entries(FILE *file) |
0ad19a3f | 785 | { |
0ad19a3f | 786 | struct mntent *mntent; |
0ad19a3f | 787 | int ret = -1; |
998ac676 RT |
788 | unsigned long mntflags; |
789 | char *mntdata; | |
0ad19a3f | 790 | |
998ac676 | 791 | while ((mntent = getmntent(file))) { |
1bc60a65 | 792 | |
998ac676 RT |
793 | mntflags = 0; |
794 | mntdata = NULL; | |
795 | if (parse_mntopts(mntent, &mntflags, &mntdata) < 0) { | |
36eb9bde | 796 | ERROR("failed to parse mount option '%s'", |
998ac676 RT |
797 | mntent->mnt_opts); |
798 | goto out; | |
799 | } | |
0ad19a3f | 800 | |
801 | if (mount(mntent->mnt_fsname, mntent->mnt_dir, | |
998ac676 | 802 | mntent->mnt_type, mntflags, mntdata)) { |
36eb9bde | 803 | SYSERROR("failed to mount '%s' on '%s'", |
0ad19a3f | 804 | mntent->mnt_fsname, mntent->mnt_dir); |
805 | goto out; | |
806 | } | |
998ac676 | 807 | |
cd54d859 DL |
808 | DEBUG("mounted %s on %s, type %s", mntent->mnt_fsname, |
809 | mntent->mnt_dir, mntent->mnt_type); | |
810 | ||
998ac676 | 811 | free(mntdata); |
0ad19a3f | 812 | } |
cd54d859 | 813 | |
0ad19a3f | 814 | ret = 0; |
cd54d859 DL |
815 | |
816 | INFO("mount points have been setup"); | |
0ad19a3f | 817 | out: |
e7938e9e MN |
818 | return ret; |
819 | } | |
820 | ||
821 | static int setup_mount(const char *fstab) | |
822 | { | |
823 | FILE *file; | |
824 | int ret; | |
825 | ||
826 | if (!fstab) | |
827 | return 0; | |
828 | ||
829 | file = setmntent(fstab, "r"); | |
830 | if (!file) { | |
831 | SYSERROR("failed to use '%s'", fstab); | |
832 | return -1; | |
833 | } | |
834 | ||
835 | ret = mount_file_entries(file); | |
836 | ||
0ad19a3f | 837 | endmntent(file); |
838 | return ret; | |
839 | } | |
840 | ||
e7938e9e MN |
841 | static int setup_mount_entries(struct lxc_list *mount) |
842 | { | |
843 | FILE *file; | |
844 | struct lxc_list *iterator; | |
845 | char *mount_entry; | |
846 | int ret; | |
847 | ||
848 | file = tmpfile(); | |
849 | if (!file) { | |
850 | ERROR("tmpfile error: %m"); | |
851 | return -1; | |
852 | } | |
853 | ||
854 | lxc_list_for_each(iterator, mount) { | |
855 | mount_entry = iterator->elem; | |
1d6b1976 | 856 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
857 | } |
858 | ||
859 | rewind(file); | |
860 | ||
861 | ret = mount_file_entries(file); | |
862 | ||
863 | fclose(file); | |
864 | return ret; | |
865 | } | |
866 | ||
81810dd1 DL |
867 | static int setup_caps(struct lxc_list *caps) |
868 | { | |
869 | struct lxc_list *iterator; | |
870 | char *drop_entry; | |
871 | int i, capid; | |
872 | ||
873 | lxc_list_for_each(iterator, caps) { | |
874 | ||
875 | drop_entry = iterator->elem; | |
876 | ||
877 | capid = -1; | |
878 | ||
879 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
880 | ||
881 | if (strcmp(drop_entry, caps_opt[i].name)) | |
882 | continue; | |
883 | ||
884 | capid = caps_opt[i].value; | |
885 | break; | |
886 | } | |
887 | ||
888 | if (capid < 0) { | |
1e11be34 DL |
889 | ERROR("unknown capability %s", drop_entry); |
890 | return -1; | |
81810dd1 DL |
891 | } |
892 | ||
893 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
894 | ||
895 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
896 | SYSERROR("failed to remove %s capability", drop_entry); | |
897 | return -1; | |
898 | } | |
899 | ||
900 | } | |
901 | ||
902 | DEBUG("capabilities has been setup"); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
0ad19a3f | 907 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
908 | { | |
909 | struct sockaddr sockaddr; | |
910 | struct ifreq ifr; | |
911 | int ret, fd; | |
912 | ||
3cfc0f3a MN |
913 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
914 | if (ret) { | |
915 | ERROR("mac address '%s' conversion failed : %s", | |
916 | hwaddr, strerror(-ret)); | |
0ad19a3f | 917 | return -1; |
918 | } | |
919 | ||
920 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
921 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
922 | ||
923 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
924 | if (fd < 0) { | |
3ab87b66 | 925 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 926 | return -1; |
927 | } | |
928 | ||
929 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
930 | close(fd); | |
931 | if (ret) | |
3ab87b66 | 932 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 933 | |
cd54d859 DL |
934 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
935 | ||
0ad19a3f | 936 | return ret; |
937 | } | |
938 | ||
82d5ae15 | 939 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 940 | { |
82d5ae15 DL |
941 | struct lxc_list *iterator; |
942 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 943 | int err; |
0ad19a3f | 944 | |
82d5ae15 DL |
945 | lxc_list_for_each(iterator, ip) { |
946 | ||
947 | inetdev = iterator->elem; | |
948 | ||
0093bb8c DL |
949 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
950 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
951 | if (err) { |
952 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
953 | ifindex, strerror(-err)); | |
82d5ae15 DL |
954 | return -1; |
955 | } | |
956 | } | |
957 | ||
958 | return 0; | |
0ad19a3f | 959 | } |
960 | ||
82d5ae15 | 961 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 962 | { |
82d5ae15 | 963 | struct lxc_list *iterator; |
7fa9074f | 964 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 965 | int err; |
0ad19a3f | 966 | |
82d5ae15 DL |
967 | lxc_list_for_each(iterator, ip) { |
968 | ||
969 | inet6dev = iterator->elem; | |
970 | ||
b3df193c | 971 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
972 | &inet6dev->mcast, &inet6dev->acast, |
973 | inet6dev->prefix); | |
3cfc0f3a MN |
974 | if (err) { |
975 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
976 | ifindex, strerror(-err)); | |
82d5ae15 | 977 | return -1; |
3cfc0f3a | 978 | } |
82d5ae15 DL |
979 | } |
980 | ||
981 | return 0; | |
0ad19a3f | 982 | } |
983 | ||
82d5ae15 | 984 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 985 | { |
0ad19a3f | 986 | char ifname[IFNAMSIZ]; |
0ad19a3f | 987 | char *current_ifname = ifname; |
3cfc0f3a | 988 | int err; |
0ad19a3f | 989 | |
82d5ae15 DL |
990 | /* empty network namespace */ |
991 | if (!netdev->ifindex) { | |
992 | if (netdev->flags | IFF_UP) { | |
3cfc0f3a MN |
993 | err = lxc_device_up("lo"); |
994 | if (err) { | |
995 | ERROR("failed to set the loopback up : %s", | |
996 | strerror(-err)); | |
82d5ae15 DL |
997 | return -1; |
998 | } | |
999 | return 0; | |
1000 | } | |
0ad19a3f | 1001 | } |
13954cce | 1002 | |
82d5ae15 DL |
1003 | /* retrieve the name of the interface */ |
1004 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1005 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1006 | netdev->ifindex); |
0ad19a3f | 1007 | return -1; |
1008 | } | |
13954cce | 1009 | |
018ef520 | 1010 | /* default: let the system to choose one interface name */ |
9d083402 MT |
1011 | if (!netdev->name) |
1012 | netdev->name = "eth%d"; | |
018ef520 | 1013 | |
82d5ae15 | 1014 | /* rename the interface name */ |
3cfc0f3a MN |
1015 | err = lxc_device_rename(ifname, netdev->name); |
1016 | if (err) { | |
1017 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1018 | strerror(-err)); | |
018ef520 DL |
1019 | return -1; |
1020 | } | |
1021 | ||
1022 | /* Re-read the name of the interface because its name has changed | |
1023 | * and would be automatically allocated by the system | |
1024 | */ | |
82d5ae15 | 1025 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1026 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1027 | netdev->ifindex); |
018ef520 | 1028 | return -1; |
0ad19a3f | 1029 | } |
1030 | ||
82d5ae15 DL |
1031 | /* set a mac address */ |
1032 | if (netdev->hwaddr) { | |
1033 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1034 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1035 | current_ifname); |
0ad19a3f | 1036 | return -1; |
1037 | } | |
1038 | } | |
1039 | ||
82d5ae15 DL |
1040 | /* setup ipv4 addresses on the interface */ |
1041 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1042 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1043 | ifname); |
1044 | return -1; | |
1045 | } | |
1046 | ||
82d5ae15 DL |
1047 | /* setup ipv6 addresses on the interface */ |
1048 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1049 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1050 | ifname); |
1051 | return -1; | |
1052 | } | |
1053 | ||
82d5ae15 DL |
1054 | /* set the network device up */ |
1055 | if (netdev->flags | IFF_UP) { | |
3cfc0f3a MN |
1056 | int err; |
1057 | ||
1058 | err = lxc_device_up(current_ifname); | |
1059 | if (err) { | |
1060 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1061 | strerror(-err)); | |
0ad19a3f | 1062 | return -1; |
1063 | } | |
1064 | ||
1065 | /* the network is up, make the loopback up too */ | |
3cfc0f3a MN |
1066 | err = lxc_device_up("lo"); |
1067 | if (err) { | |
1068 | ERROR("failed to set the loopback up : %s", | |
1069 | strerror(-err)); | |
0ad19a3f | 1070 | return -1; |
1071 | } | |
1072 | } | |
1073 | ||
cd54d859 DL |
1074 | DEBUG("'%s' has been setup", current_ifname); |
1075 | ||
0ad19a3f | 1076 | return 0; |
1077 | } | |
1078 | ||
5f4535a3 | 1079 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1080 | { |
82d5ae15 | 1081 | struct lxc_list *iterator; |
82d5ae15 | 1082 | struct lxc_netdev *netdev; |
0ad19a3f | 1083 | |
5f4535a3 | 1084 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1085 | |
5f4535a3 | 1086 | netdev = iterator->elem; |
82d5ae15 DL |
1087 | |
1088 | if (setup_netdev(netdev)) { | |
1089 | ERROR("failed to setup netdev"); | |
1090 | return -1; | |
1091 | } | |
1092 | } | |
cd54d859 | 1093 | |
5f4535a3 DL |
1094 | if (!lxc_list_empty(network)) |
1095 | INFO("network has been setup"); | |
cd54d859 DL |
1096 | |
1097 | return 0; | |
0ad19a3f | 1098 | } |
1099 | ||
7b379ab3 | 1100 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 1101 | { |
7b379ab3 MN |
1102 | struct lxc_conf *new; |
1103 | ||
1104 | new = malloc(sizeof(*new)); | |
1105 | if (!new) { | |
1106 | ERROR("lxc_conf_init : %m"); | |
1107 | return NULL; | |
1108 | } | |
1109 | memset(new, 0, sizeof(*new)); | |
1110 | ||
28a4b0e5 | 1111 | new->console.path = NULL; |
63376d7d DL |
1112 | new->console.peer = -1; |
1113 | new->console.master = -1; | |
1114 | new->console.slave = -1; | |
1115 | new->console.name[0] = '\0'; | |
7b379ab3 MN |
1116 | lxc_list_init(&new->cgroup); |
1117 | lxc_list_init(&new->network); | |
1118 | lxc_list_init(&new->mount_list); | |
81810dd1 | 1119 | lxc_list_init(&new->caps); |
7b379ab3 MN |
1120 | |
1121 | return new; | |
089cd8b8 DL |
1122 | } |
1123 | ||
82d5ae15 | 1124 | static int instanciate_veth(struct lxc_netdev *netdev) |
0ad19a3f | 1125 | { |
8634bc19 | 1126 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 1127 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 1128 | int err; |
13954cce | 1129 | |
e892973e DL |
1130 | if (netdev->priv.veth_attr.pair) |
1131 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 MT |
1132 | else { |
1133 | snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
0e391e57 | 1134 | veth1 = mktemp(veth1buf); |
8634bc19 | 1135 | } |
82d5ae15 | 1136 | |
0e391e57 DL |
1137 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
1138 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
1139 | |
1140 | if (!strlen(veth1) || !strlen(veth2)) { | |
1141 | ERROR("failed to allocate a temporary name"); | |
1142 | return -1; | |
0ad19a3f | 1143 | } |
1144 | ||
3cfc0f3a MN |
1145 | err = lxc_veth_create(veth1, veth2); |
1146 | if (err) { | |
1147 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
1148 | strerror(-err)); | |
6ab9ab6d | 1149 | return -1; |
0ad19a3f | 1150 | } |
13954cce | 1151 | |
82d5ae15 | 1152 | if (netdev->mtu) { |
3cfc0f3a MN |
1153 | err = lxc_device_set_mtu(veth1, atoi(netdev->mtu)); |
1154 | if (!err) | |
1155 | err = lxc_device_set_mtu(veth2, atoi(netdev->mtu)); | |
1156 | if (err) { | |
1157 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
1158 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 1159 | goto out_delete; |
75d09f83 DL |
1160 | } |
1161 | } | |
1162 | ||
3cfc0f3a MN |
1163 | if (netdev->link) { |
1164 | err = lxc_bridge_attach(netdev->link, veth1); | |
1165 | if (err) { | |
1166 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
1167 | veth1, netdev->link, strerror(-err)); | |
1168 | goto out_delete; | |
1169 | } | |
eb14c10a DL |
1170 | } |
1171 | ||
82d5ae15 DL |
1172 | netdev->ifindex = if_nametoindex(veth2); |
1173 | if (!netdev->ifindex) { | |
36eb9bde | 1174 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
1175 | goto out_delete; |
1176 | } | |
1177 | ||
82d5ae15 | 1178 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1179 | err = lxc_device_up(veth1); |
1180 | if (err) { | |
1181 | ERROR("failed to set %s up : %s", veth1, | |
1182 | strerror(-err)); | |
eb14c10a | 1183 | goto out_delete; |
0ad19a3f | 1184 | } |
1185 | } | |
1186 | ||
82d5ae15 DL |
1187 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
1188 | veth1, veth2, netdev->ifindex); | |
1189 | ||
6ab9ab6d | 1190 | return 0; |
eb14c10a DL |
1191 | |
1192 | out_delete: | |
1193 | lxc_device_delete(veth1); | |
6ab9ab6d | 1194 | return -1; |
13954cce | 1195 | } |
d957ae2d | 1196 | |
82d5ae15 | 1197 | static int instanciate_macvlan(struct lxc_netdev *netdev) |
0ad19a3f | 1198 | { |
0e391e57 | 1199 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 1200 | int err; |
d957ae2d MT |
1201 | |
1202 | if (!netdev->link) { | |
1203 | ERROR("no link specified for macvlan netdev"); | |
1204 | return -1; | |
1205 | } | |
13954cce | 1206 | |
0e391e57 | 1207 | snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
82d5ae15 | 1208 | |
0e391e57 | 1209 | peer = mktemp(peerbuf); |
82d5ae15 DL |
1210 | if (!strlen(peer)) { |
1211 | ERROR("failed to make a temporary name"); | |
1212 | return -1; | |
0ad19a3f | 1213 | } |
1214 | ||
3cfc0f3a MN |
1215 | err = lxc_macvlan_create(netdev->link, peer, |
1216 | netdev->priv.macvlan_attr.mode); | |
1217 | if (err) { | |
1218 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
1219 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 1220 | return -1; |
0ad19a3f | 1221 | } |
1222 | ||
82d5ae15 DL |
1223 | netdev->ifindex = if_nametoindex(peer); |
1224 | if (!netdev->ifindex) { | |
36eb9bde | 1225 | ERROR("failed to retrieve the index for %s", peer); |
d957ae2d MT |
1226 | lxc_device_delete(peer); |
1227 | return -1; | |
22ebac19 | 1228 | } |
1229 | ||
e892973e DL |
1230 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
1231 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 1232 | |
d957ae2d | 1233 | return 0; |
0ad19a3f | 1234 | } |
1235 | ||
26c39028 JHS |
1236 | /* XXX: merge with instanciate_macvlan */ |
1237 | static int instanciate_vlan(struct lxc_netdev *netdev) | |
1238 | { | |
1239 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 1240 | int err; |
26c39028 JHS |
1241 | |
1242 | if (!netdev->link) { | |
1243 | ERROR("no link specified for vlan netdev"); | |
1244 | return -1; | |
1245 | } | |
1246 | ||
e892973e | 1247 | snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
26c39028 | 1248 | |
3cfc0f3a MN |
1249 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
1250 | if (err) { | |
1251 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
1252 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
1253 | return -1; |
1254 | } | |
1255 | ||
1256 | netdev->ifindex = if_nametoindex(peer); | |
1257 | if (!netdev->ifindex) { | |
1258 | ERROR("failed to retrieve the ifindex for %s", peer); | |
1259 | lxc_device_delete(peer); | |
1260 | return -1; | |
1261 | } | |
1262 | ||
e892973e DL |
1263 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
1264 | netdev->ifindex); | |
1265 | ||
26c39028 JHS |
1266 | return 0; |
1267 | } | |
1268 | ||
82d5ae15 | 1269 | static int instanciate_phys(struct lxc_netdev *netdev) |
0ad19a3f | 1270 | { |
9d083402 | 1271 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 1272 | if (!netdev->ifindex) { |
9d083402 | 1273 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 1274 | return -1; |
1275 | } | |
1276 | ||
82d5ae15 | 1277 | return 0; |
0ad19a3f | 1278 | } |
1279 | ||
82d5ae15 | 1280 | static int instanciate_empty(struct lxc_netdev *netdev) |
0ad19a3f | 1281 | { |
82d5ae15 DL |
1282 | netdev->ifindex = 0; |
1283 | return 0; | |
0ad19a3f | 1284 | } |
1285 | ||
5f4535a3 | 1286 | int lxc_create_network(struct lxc_list *network) |
0ad19a3f | 1287 | { |
82d5ae15 | 1288 | struct lxc_list *iterator; |
82d5ae15 | 1289 | struct lxc_netdev *netdev; |
0ad19a3f | 1290 | |
5f4535a3 | 1291 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 1292 | |
5f4535a3 | 1293 | netdev = iterator->elem; |
13954cce | 1294 | |
24654103 | 1295 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 1296 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 1297 | netdev->type); |
82d5ae15 DL |
1298 | return -1; |
1299 | } | |
0ad19a3f | 1300 | |
5f4535a3 | 1301 | if (netdev_conf[netdev->type](netdev)) { |
82d5ae15 DL |
1302 | ERROR("failed to create netdev"); |
1303 | return -1; | |
1304 | } | |
0ad19a3f | 1305 | } |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
7fef7a06 DL |
1310 | void lxc_delete_network(struct lxc_list *network) |
1311 | { | |
1312 | struct lxc_list *iterator; | |
1313 | struct lxc_netdev *netdev; | |
1314 | ||
1315 | lxc_list_for_each(iterator, network) { | |
1316 | netdev = iterator->elem; | |
1317 | if (netdev->ifindex > 0) | |
1318 | lxc_device_delete_index(netdev->ifindex); | |
1319 | } | |
1320 | } | |
1321 | ||
5f4535a3 | 1322 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 1323 | { |
82d5ae15 | 1324 | struct lxc_list *iterator; |
82d5ae15 | 1325 | struct lxc_netdev *netdev; |
3cfc0f3a | 1326 | int err; |
0ad19a3f | 1327 | |
5f4535a3 | 1328 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 1329 | |
5f4535a3 | 1330 | netdev = iterator->elem; |
82d5ae15 | 1331 | |
236087a6 DL |
1332 | /* empty network namespace, nothing to move */ |
1333 | if (!netdev->ifindex) | |
1334 | continue; | |
1335 | ||
3cfc0f3a MN |
1336 | err = lxc_device_move(netdev->ifindex, pid); |
1337 | if (err) { | |
1338 | ERROR("failed to move '%s' to the container : %s", | |
1339 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
1340 | return -1; |
1341 | } | |
1342 | ||
9d083402 | 1343 | DEBUG("move '%s' to '%d'", netdev->link, pid); |
0ad19a3f | 1344 | } |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
5e4a62bf | 1349 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 1350 | { |
5e4a62bf | 1351 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 1352 | int i; |
b0a33c1e | 1353 | |
5e4a62bf DL |
1354 | /* no tty in the configuration */ |
1355 | if (!conf->tty) | |
b0a33c1e | 1356 | return 0; |
1357 | ||
13954cce | 1358 | tty_info->pty_info = |
e4e7d59d | 1359 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 1360 | if (!tty_info->pty_info) { |
36eb9bde | 1361 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 1362 | return -1; |
b0a33c1e | 1363 | } |
1364 | ||
985d15b1 | 1365 | for (i = 0; i < conf->tty; i++) { |
13954cce | 1366 | |
b0a33c1e | 1367 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
1368 | ||
13954cce | 1369 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 1370 | pty_info->name, NULL, NULL)) { |
36eb9bde | 1371 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
1372 | tty_info->nbtty = i; |
1373 | lxc_delete_tty(tty_info); | |
1374 | return -1; | |
b0a33c1e | 1375 | } |
1376 | ||
5332bb84 DL |
1377 | DEBUG("allocated pty '%s' (%d/%d)", |
1378 | pty_info->name, pty_info->master, pty_info->slave); | |
1379 | ||
b035ad62 MS |
1380 | /* Prevent leaking the file descriptors to the container */ |
1381 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
1382 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
1383 | ||
b0a33c1e | 1384 | pty_info->busy = 0; |
1385 | } | |
1386 | ||
985d15b1 | 1387 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
1388 | |
1389 | INFO("tty's configured"); | |
1390 | ||
985d15b1 | 1391 | return 0; |
b0a33c1e | 1392 | } |
1393 | ||
1394 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
1395 | { | |
1396 | int i; | |
1397 | ||
1398 | for (i = 0; i < tty_info->nbtty; i++) { | |
1399 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
1400 | ||
1401 | close(pty_info->master); | |
1402 | close(pty_info->slave); | |
1403 | } | |
1404 | ||
1405 | free(tty_info->pty_info); | |
1406 | tty_info->nbtty = 0; | |
1407 | } | |
1408 | ||
571e6ec8 | 1409 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 1410 | { |
571e6ec8 | 1411 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 1412 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 1413 | return -1; |
0ad19a3f | 1414 | } |
1415 | ||
5f4535a3 | 1416 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 1417 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 1418 | return -1; |
0ad19a3f | 1419 | } |
1420 | ||
571e6ec8 | 1421 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
36eb9bde | 1422 | ERROR("failed to setup the cgroups for '%s'", name); |
95b5ffaf | 1423 | return -1; |
0ad19a3f | 1424 | } |
1425 | ||
571e6ec8 | 1426 | if (setup_mount(lxc_conf->fstab)) { |
36eb9bde | 1427 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 1428 | return -1; |
576f946d | 1429 | } |
1430 | ||
e7938e9e MN |
1431 | if (setup_mount_entries(&lxc_conf->mount_list)) { |
1432 | ERROR("failed to setup the mount entries for '%s'", name); | |
1433 | return -1; | |
1434 | } | |
1435 | ||
33fcb7a0 | 1436 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console)) { |
36eb9bde | 1437 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 1438 | return -1; |
6e590161 | 1439 | } |
1440 | ||
33fcb7a0 | 1441 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info)) { |
36eb9bde | 1442 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 1443 | return -1; |
b0a33c1e | 1444 | } |
1445 | ||
33fcb7a0 | 1446 | if (setup_rootfs(&lxc_conf->rootfs)) { |
36eb9bde | 1447 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 1448 | return -1; |
ed502555 | 1449 | } |
1450 | ||
571e6ec8 | 1451 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 1452 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 1453 | return -1; |
3c26f34e | 1454 | } |
1455 | ||
81810dd1 DL |
1456 | if (setup_caps(&lxc_conf->caps)) { |
1457 | ERROR("failed to drop capabilities"); | |
1458 | return -1; | |
1459 | } | |
1460 | ||
cd54d859 DL |
1461 | NOTICE("'%s' is setup.", name); |
1462 | ||
0ad19a3f | 1463 | return 0; |
1464 | } |