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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <dlezcano at fr.ibm.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #define _GNU_SOURCE | |
24 | #include <stdio.h> | |
25 | #undef _GNU_SOURCE | |
26 | #include <stdlib.h> | |
e3b4c4c4 | 27 | #include <stdarg.h> |
0ad19a3f | 28 | #include <errno.h> |
29 | #include <string.h> | |
30 | #include <dirent.h> | |
31 | #include <mntent.h> | |
32 | #include <unistd.h> | |
e3b4c4c4 | 33 | #include <sys/wait.h> |
b0a33c1e | 34 | #include <pty.h> |
0ad19a3f | 35 | |
b3ecde1e DL |
36 | #include <linux/loop.h> |
37 | ||
0ad19a3f | 38 | #include <sys/types.h> |
39 | #include <sys/utsname.h> | |
40 | #include <sys/param.h> | |
41 | #include <sys/stat.h> | |
42 | #include <sys/socket.h> | |
43 | #include <sys/mount.h> | |
44 | #include <sys/mman.h> | |
81810dd1 DL |
45 | #include <sys/prctl.h> |
46 | #include <sys/capability.h> | |
cccc74b5 | 47 | #include <sys/personality.h> |
0ad19a3f | 48 | |
49 | #include <arpa/inet.h> | |
50 | #include <fcntl.h> | |
51 | #include <netinet/in.h> | |
52 | #include <net/if.h> | |
6f4a3756 | 53 | #include <libgen.h> |
0ad19a3f | 54 | |
e5bda9ee | 55 | #include "network.h" |
56 | #include "error.h" | |
b2718c72 | 57 | #include "parse.h" |
881450bb | 58 | #include "config.h" |
1b09f2c0 DL |
59 | #include "utils.h" |
60 | #include "conf.h" | |
61 | #include "log.h" | |
62 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
d55bc1ad | 63 | #include "caps.h" /* for lxc_caps_last_cap() */ |
36eb9bde CLG |
64 | |
65 | lxc_log_define(lxc_conf, lxc); | |
e5bda9ee | 66 | |
0ad19a3f | 67 | #define MAXHWLEN 18 |
68 | #define MAXINDEXLEN 20 | |
442cbbe6 | 69 | #define MAXMTULEN 16 |
0ad19a3f | 70 | #define MAXLINELEN 128 |
71 | ||
968fbd36 SK |
72 | #ifndef MS_DIRSYNC |
73 | #define MS_DIRSYNC 128 | |
74 | #endif | |
75 | ||
fdc03323 DL |
76 | #ifndef MS_REC |
77 | #define MS_REC 16384 | |
78 | #endif | |
79 | ||
c08556c6 DL |
80 | #ifndef MNT_DETACH |
81 | #define MNT_DETACH 2 | |
82 | #endif | |
83 | ||
88d413d5 SW |
84 | #ifndef MS_RELATIME |
85 | #define MS_RELATIME (1 << 21) | |
86 | #endif | |
87 | ||
88 | #ifndef MS_STRICTATIME | |
89 | #define MS_STRICTATIME (1 << 24) | |
90 | #endif | |
91 | ||
b09094da MN |
92 | #ifndef CAP_SETFCAP |
93 | #define CAP_SETFCAP 31 | |
94 | #endif | |
95 | ||
96 | #ifndef CAP_MAC_OVERRIDE | |
97 | #define CAP_MAC_OVERRIDE 32 | |
98 | #endif | |
99 | ||
100 | #ifndef CAP_MAC_ADMIN | |
101 | #define CAP_MAC_ADMIN 33 | |
102 | #endif | |
103 | ||
104 | #ifndef PR_CAPBSET_DROP | |
105 | #define PR_CAPBSET_DROP 24 | |
106 | #endif | |
107 | ||
bf601689 MH |
108 | extern int pivot_root(const char * new_root, const char * put_old); |
109 | ||
e3b4c4c4 | 110 | typedef int (*instanciate_cb)(struct lxc_handler *, struct lxc_netdev *); |
0ad19a3f | 111 | |
998ac676 RT |
112 | struct mount_opt { |
113 | char *name; | |
114 | int clear; | |
115 | int flag; | |
116 | }; | |
117 | ||
81810dd1 DL |
118 | struct caps_opt { |
119 | char *name; | |
120 | int value; | |
121 | }; | |
122 | ||
e3b4c4c4 ST |
123 | static int instanciate_veth(struct lxc_handler *, struct lxc_netdev *); |
124 | static int instanciate_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
125 | static int instanciate_vlan(struct lxc_handler *, struct lxc_netdev *); | |
126 | static int instanciate_phys(struct lxc_handler *, struct lxc_netdev *); | |
127 | static int instanciate_empty(struct lxc_handler *, struct lxc_netdev *); | |
82d5ae15 | 128 | |
24654103 DL |
129 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
130 | [LXC_NET_VETH] = instanciate_veth, | |
131 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
132 | [LXC_NET_VLAN] = instanciate_vlan, | |
133 | [LXC_NET_PHYS] = instanciate_phys, | |
134 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 135 | }; |
136 | ||
998ac676 | 137 | static struct mount_opt mount_opt[] = { |
88d413d5 SW |
138 | { "defaults", 0, 0 }, |
139 | { "ro", 0, MS_RDONLY }, | |
140 | { "rw", 1, MS_RDONLY }, | |
141 | { "suid", 1, MS_NOSUID }, | |
142 | { "nosuid", 0, MS_NOSUID }, | |
143 | { "dev", 1, MS_NODEV }, | |
144 | { "nodev", 0, MS_NODEV }, | |
145 | { "exec", 1, MS_NOEXEC }, | |
146 | { "noexec", 0, MS_NOEXEC }, | |
147 | { "sync", 0, MS_SYNCHRONOUS }, | |
148 | { "async", 1, MS_SYNCHRONOUS }, | |
149 | { "dirsync", 0, MS_DIRSYNC }, | |
150 | { "remount", 0, MS_REMOUNT }, | |
151 | { "mand", 0, MS_MANDLOCK }, | |
152 | { "nomand", 1, MS_MANDLOCK }, | |
153 | { "atime", 1, MS_NOATIME }, | |
154 | { "noatime", 0, MS_NOATIME }, | |
155 | { "diratime", 1, MS_NODIRATIME }, | |
156 | { "nodiratime", 0, MS_NODIRATIME }, | |
157 | { "bind", 0, MS_BIND }, | |
158 | { "rbind", 0, MS_BIND|MS_REC }, | |
159 | { "relatime", 0, MS_RELATIME }, | |
160 | { "norelatime", 1, MS_RELATIME }, | |
161 | { "strictatime", 0, MS_STRICTATIME }, | |
162 | { "nostrictatime", 1, MS_STRICTATIME }, | |
163 | { NULL, 0, 0 }, | |
998ac676 RT |
164 | }; |
165 | ||
81810dd1 | 166 | static struct caps_opt caps_opt[] = { |
a6afdde9 | 167 | { "chown", CAP_CHOWN }, |
1e11be34 DL |
168 | { "dac_override", CAP_DAC_OVERRIDE }, |
169 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
170 | { "fowner", CAP_FOWNER }, | |
171 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
172 | { "kill", CAP_KILL }, |
173 | { "setgid", CAP_SETGID }, | |
174 | { "setuid", CAP_SETUID }, | |
175 | { "setpcap", CAP_SETPCAP }, | |
176 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
177 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
178 | { "net_broadcast", CAP_NET_BROADCAST }, | |
179 | { "net_admin", CAP_NET_ADMIN }, | |
180 | { "net_raw", CAP_NET_RAW }, | |
181 | { "ipc_lock", CAP_IPC_LOCK }, | |
182 | { "ipc_owner", CAP_IPC_OWNER }, | |
183 | { "sys_module", CAP_SYS_MODULE }, | |
184 | { "sys_rawio", CAP_SYS_RAWIO }, | |
185 | { "sys_chroot", CAP_SYS_CHROOT }, | |
186 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
187 | { "sys_pacct", CAP_SYS_PACCT }, | |
188 | { "sys_admin", CAP_SYS_ADMIN }, | |
189 | { "sys_boot", CAP_SYS_BOOT }, | |
190 | { "sys_nice", CAP_SYS_NICE }, | |
191 | { "sys_resource", CAP_SYS_RESOURCE }, | |
192 | { "sys_time", CAP_SYS_TIME }, | |
193 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
194 | { "mknod", CAP_MKNOD }, | |
195 | { "lease", CAP_LEASE }, | |
9527e566 | 196 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 197 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
198 | #endif |
199 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 200 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 201 | #endif |
81810dd1 DL |
202 | { "setfcap", CAP_SETFCAP }, |
203 | { "mac_override", CAP_MAC_OVERRIDE }, | |
204 | { "mac_admin", CAP_MAC_ADMIN }, | |
5170c716 CS |
205 | #ifdef CAP_SYSLOG |
206 | { "syslog", CAP_SYSLOG }, | |
207 | #endif | |
208 | #ifdef CAP_WAKE_ALARM | |
209 | { "wake_alarm", CAP_WAKE_ALARM }, | |
210 | #endif | |
81810dd1 DL |
211 | }; |
212 | ||
751d9dcd DL |
213 | static int run_script(const char *name, const char *section, |
214 | const char *script, ...) | |
e3b4c4c4 | 215 | { |
abbfd20b DL |
216 | int ret; |
217 | FILE *f; | |
218 | char *buffer, *p, *output; | |
219 | size_t size = 0; | |
220 | va_list ap; | |
751d9dcd DL |
221 | |
222 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
223 | script, name, section); | |
e3b4c4c4 | 224 | |
abbfd20b DL |
225 | va_start(ap, script); |
226 | while ((p = va_arg(ap, char *))) | |
95642a10 | 227 | size += strlen(p) + 1; |
abbfd20b DL |
228 | va_end(ap); |
229 | ||
230 | size += strlen(script); | |
231 | size += strlen(name); | |
232 | size += strlen(section); | |
95642a10 | 233 | size += 3; |
abbfd20b | 234 | |
95642a10 MS |
235 | if (size > INT_MAX) |
236 | return -1; | |
237 | ||
238 | buffer = alloca(size); | |
abbfd20b DL |
239 | if (!buffer) { |
240 | ERROR("failed to allocate memory"); | |
751d9dcd DL |
241 | return -1; |
242 | } | |
243 | ||
abbfd20b | 244 | ret = sprintf(buffer, "%s %s %s", script, name, section); |
751d9dcd | 245 | |
abbfd20b DL |
246 | va_start(ap, script); |
247 | while ((p = va_arg(ap, char *))) | |
248 | ret += sprintf(buffer + ret, " %s", p); | |
249 | va_end(ap); | |
751d9dcd | 250 | |
abbfd20b DL |
251 | f = popen(buffer, "r"); |
252 | if (!f) { | |
253 | SYSERROR("popen failed"); | |
254 | return -1; | |
255 | } | |
e3b4c4c4 | 256 | |
abbfd20b DL |
257 | output = malloc(LXC_LOG_BUFFER_SIZE); |
258 | if (!output) { | |
259 | ERROR("failed to allocate memory for script output"); | |
260 | return -1; | |
e3b4c4c4 | 261 | } |
751d9dcd | 262 | |
abbfd20b DL |
263 | while(fgets(output, LXC_LOG_BUFFER_SIZE, f)) |
264 | DEBUG("script output: %s", output); | |
265 | ||
266 | free(output); | |
267 | ||
268 | if (pclose(f)) { | |
269 | ERROR("Script exited on error"); | |
751d9dcd DL |
270 | return -1; |
271 | } | |
272 | ||
273 | return 0; | |
e3b4c4c4 ST |
274 | } |
275 | ||
a6afdde9 | 276 | static int find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 277 | { |
278 | struct cbarg { | |
279 | const char *rootfs; | |
a6afdde9 | 280 | const char *target; |
78ae2fcc | 281 | int mntopt; |
282 | } *cbarg = data; | |
283 | ||
284 | char *fstype; | |
285 | ||
286 | /* we don't try 'nodev' entries */ | |
287 | if (strstr(buffer, "nodev")) | |
288 | return 0; | |
289 | ||
290 | fstype = buffer; | |
b2718c72 | 291 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
292 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 293 | |
a6afdde9 DL |
294 | DEBUG("trying to mount '%s'->'%s' with fstype '%s'", |
295 | cbarg->rootfs, cbarg->target, fstype); | |
296 | ||
297 | if (mount(cbarg->rootfs, cbarg->target, fstype, cbarg->mntopt, NULL)) { | |
298 | DEBUG("mount failed with error: %s", strerror(errno)); | |
78ae2fcc | 299 | return 0; |
a6afdde9 | 300 | } |
78ae2fcc | 301 | |
a6afdde9 DL |
302 | INFO("mounted '%s' on '%s', with fstype '%s'", |
303 | cbarg->rootfs, cbarg->target, fstype); | |
78ae2fcc | 304 | |
305 | return 1; | |
306 | } | |
307 | ||
2656d231 | 308 | static int mount_unknow_fs(const char *rootfs, const char *target, int mntopt) |
78ae2fcc | 309 | { |
a6afdde9 | 310 | int i; |
78ae2fcc | 311 | |
312 | struct cbarg { | |
313 | const char *rootfs; | |
a6afdde9 | 314 | const char *target; |
78ae2fcc | 315 | int mntopt; |
316 | } cbarg = { | |
317 | .rootfs = rootfs, | |
a6afdde9 | 318 | .target = target, |
78ae2fcc | 319 | .mntopt = mntopt, |
320 | }; | |
321 | ||
a6afdde9 DL |
322 | /* |
323 | * find the filesystem type with brute force: | |
324 | * first we check with /etc/filesystems, in case the modules | |
78ae2fcc | 325 | * are auto-loaded and fall back to the supported kernel fs |
326 | */ | |
327 | char *fsfile[] = { | |
328 | "/etc/filesystems", | |
329 | "/proc/filesystems", | |
330 | }; | |
331 | ||
a6afdde9 DL |
332 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { |
333 | ||
334 | int ret; | |
335 | ||
336 | if (access(fsfile[i], F_OK)) | |
337 | continue; | |
338 | ||
339 | ret = lxc_file_for_each_line(fsfile[i], find_fstype_cb, &cbarg); | |
340 | if (ret < 0) { | |
341 | ERROR("failed to parse '%s'", fsfile[i]); | |
342 | return -1; | |
343 | } | |
344 | ||
345 | if (ret) | |
346 | return 0; | |
78ae2fcc | 347 | } |
348 | ||
a6afdde9 DL |
349 | ERROR("failed to determine fs type for '%s'", rootfs); |
350 | return -1; | |
351 | } | |
352 | ||
2656d231 | 353 | static int mount_rootfs_dir(const char *rootfs, const char *target) |
a6afdde9 DL |
354 | { |
355 | return mount(rootfs, target, "none", MS_BIND | MS_REC, NULL); | |
356 | } | |
357 | ||
358 | static int setup_lodev(const char *rootfs, int fd, struct loop_info64 *loinfo) | |
359 | { | |
360 | int rfd; | |
361 | int ret = -1; | |
362 | ||
363 | rfd = open(rootfs, O_RDWR); | |
364 | if (rfd < 0) { | |
365 | SYSERROR("failed to open '%s'", rootfs); | |
78ae2fcc | 366 | return -1; |
367 | } | |
368 | ||
a6afdde9 | 369 | memset(loinfo, 0, sizeof(*loinfo)); |
78ae2fcc | 370 | |
a6afdde9 | 371 | loinfo->lo_flags = LO_FLAGS_AUTOCLEAR; |
78ae2fcc | 372 | |
a6afdde9 DL |
373 | if (ioctl(fd, LOOP_SET_FD, rfd)) { |
374 | SYSERROR("failed to LOOP_SET_FD"); | |
375 | goto out; | |
78ae2fcc | 376 | } |
377 | ||
a6afdde9 DL |
378 | if (ioctl(fd, LOOP_SET_STATUS64, loinfo)) { |
379 | SYSERROR("failed to LOOP_SET_STATUS64"); | |
78ae2fcc | 380 | goto out; |
381 | } | |
382 | ||
a6afdde9 | 383 | ret = 0; |
78ae2fcc | 384 | out: |
a6afdde9 | 385 | close(rfd); |
78ae2fcc | 386 | |
a6afdde9 | 387 | return ret; |
78ae2fcc | 388 | } |
389 | ||
2656d231 | 390 | static int mount_rootfs_file(const char *rootfs, const char *target) |
78ae2fcc | 391 | { |
a6afdde9 DL |
392 | struct dirent dirent, *direntp; |
393 | struct loop_info64 loinfo; | |
394 | int ret = -1, fd = -1; | |
395 | DIR *dir; | |
396 | char path[MAXPATHLEN]; | |
78ae2fcc | 397 | |
a6afdde9 DL |
398 | dir = opendir("/dev"); |
399 | if (!dir) { | |
400 | SYSERROR("failed to open '/dev'"); | |
78ae2fcc | 401 | return -1; |
402 | } | |
403 | ||
a6afdde9 DL |
404 | while (!readdir_r(dir, &dirent, &direntp)) { |
405 | ||
406 | if (!direntp) | |
407 | break; | |
408 | ||
409 | if (!strcmp(direntp->d_name, ".")) | |
410 | continue; | |
411 | ||
412 | if (!strcmp(direntp->d_name, "..")) | |
413 | continue; | |
414 | ||
415 | if (strncmp(direntp->d_name, "loop", 4)) | |
416 | continue; | |
417 | ||
418 | sprintf(path, "/dev/%s", direntp->d_name); | |
419 | fd = open(path, O_RDWR); | |
420 | if (fd < 0) | |
421 | continue; | |
422 | ||
423 | if (ioctl(fd, LOOP_GET_STATUS64, &loinfo) == 0) { | |
424 | close(fd); | |
425 | continue; | |
426 | } | |
427 | ||
428 | if (errno != ENXIO) { | |
429 | WARN("unexpected error for ioctl on '%s': %m", | |
430 | direntp->d_name); | |
431 | continue; | |
432 | } | |
433 | ||
434 | DEBUG("found '%s' free lodev", path); | |
435 | ||
436 | ret = setup_lodev(rootfs, fd, &loinfo); | |
437 | if (!ret) | |
2656d231 | 438 | ret = mount_unknow_fs(path, target, 0); |
a6afdde9 DL |
439 | close(fd); |
440 | ||
441 | break; | |
442 | } | |
443 | ||
444 | if (closedir(dir)) | |
445 | WARN("failed to close directory"); | |
446 | ||
447 | return ret; | |
78ae2fcc | 448 | } |
449 | ||
2656d231 | 450 | static int mount_rootfs_block(const char *rootfs, const char *target) |
a6afdde9 | 451 | { |
2656d231 | 452 | return mount_unknow_fs(rootfs, target, 0); |
a6afdde9 DL |
453 | } |
454 | ||
0c547523 SH |
455 | /* |
456 | * pin_rootfs | |
457 | * if rootfs is a directory, then open ${rootfs}.hold for writing for the | |
458 | * duration of the container run, to prevent the container from marking the | |
459 | * underlying fs readonly on shutdown. | |
460 | * return -1 on error. | |
461 | * return -2 if nothing needed to be pinned. | |
462 | * return an open fd (>=0) if we pinned it. | |
463 | */ | |
464 | int pin_rootfs(const char *rootfs) | |
465 | { | |
466 | char absrootfs[MAXPATHLEN]; | |
467 | char absrootfspin[MAXPATHLEN]; | |
468 | struct stat s; | |
469 | int ret, fd; | |
470 | ||
471 | if (!realpath(rootfs, absrootfs)) { | |
472 | SYSERROR("failed to get real path for '%s'", rootfs); | |
473 | return -1; | |
474 | } | |
475 | ||
476 | if (access(absrootfs, F_OK)) { | |
477 | SYSERROR("'%s' is not accessible", absrootfs); | |
478 | return -1; | |
479 | } | |
480 | ||
481 | if (stat(absrootfs, &s)) { | |
482 | SYSERROR("failed to stat '%s'", absrootfs); | |
483 | return -1; | |
484 | } | |
485 | ||
486 | if (!__S_ISTYPE(s.st_mode, S_IFDIR)) | |
487 | return -2; | |
488 | ||
489 | ret = snprintf(absrootfspin, MAXPATHLEN, "%s%s", absrootfs, ".hold"); | |
490 | if (ret >= MAXPATHLEN) { | |
491 | SYSERROR("pathname too long for rootfs hold file"); | |
492 | return -1; | |
493 | } | |
494 | ||
495 | fd = open(absrootfspin, O_CREAT | O_RDWR, S_IWUSR|S_IRUSR); | |
496 | INFO("opened %s as fd %d\n", absrootfspin, fd); | |
497 | return fd; | |
498 | } | |
499 | ||
2656d231 | 500 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 501 | { |
b09ef133 | 502 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 503 | struct stat s; |
a6afdde9 | 504 | int i; |
78ae2fcc | 505 | |
a6afdde9 | 506 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 507 | |
508 | struct rootfs_type { | |
509 | int type; | |
510 | rootfs_cb cb; | |
511 | } rtfs_type[] = { | |
2656d231 DL |
512 | { S_IFDIR, mount_rootfs_dir }, |
513 | { S_IFBLK, mount_rootfs_block }, | |
514 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 515 | }; |
0ad19a3f | 516 | |
4c8ab83b | 517 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 518 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 519 | return -1; |
520 | } | |
b09ef133 | 521 | |
b09ef133 | 522 | if (access(absrootfs, F_OK)) { |
36eb9bde | 523 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 524 | return -1; |
525 | } | |
526 | ||
78ae2fcc | 527 | if (stat(absrootfs, &s)) { |
36eb9bde | 528 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 529 | return -1; |
530 | } | |
531 | ||
78ae2fcc | 532 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 533 | |
78ae2fcc | 534 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
535 | continue; | |
9b0f0477 | 536 | |
a6afdde9 | 537 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 538 | } |
9b0f0477 | 539 | |
36eb9bde | 540 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 541 | return -1; |
0ad19a3f | 542 | } |
543 | ||
4e5440c6 | 544 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 545 | { |
4e5440c6 DL |
546 | if (!utsname) |
547 | return 0; | |
0ad19a3f | 548 | |
4e5440c6 DL |
549 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
550 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 551 | return -1; |
552 | } | |
553 | ||
4e5440c6 | 554 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 555 | |
0ad19a3f | 556 | return 0; |
557 | } | |
558 | ||
33fcb7a0 | 559 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 560 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 561 | { |
7c6ef2a2 SH |
562 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
563 | int i, ret; | |
b0a33c1e | 564 | |
bc9bd0e3 DL |
565 | if (!rootfs->path) |
566 | return 0; | |
567 | ||
b0a33c1e | 568 | for (i = 0; i < tty_info->nbtty; i++) { |
569 | ||
570 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
571 | ||
7c6ef2a2 | 572 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 573 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
574 | if (ret >= sizeof(path)) { |
575 | ERROR("pathname too long for ttys"); | |
576 | return -1; | |
577 | } | |
578 | if (ttydir) { | |
579 | /* create dev/lxc/tty%d" */ | |
580 | snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", | |
581 | rootfs->mount, ttydir, i + 1); | |
582 | if (ret >= sizeof(lxcpath)) { | |
583 | ERROR("pathname too long for ttys"); | |
584 | return -1; | |
585 | } | |
586 | ret = creat(lxcpath, 0660); | |
587 | if (ret==-1 && errno != EEXIST) { | |
588 | SYSERROR("error creating %s\n", lxcpath); | |
589 | return -1; | |
590 | } | |
591 | close(ret); | |
592 | ret = unlink(path); | |
593 | if (ret && errno != ENOENT) { | |
594 | SYSERROR("error unlinking %s\n", path); | |
595 | return -1; | |
596 | } | |
b0a33c1e | 597 | |
7c6ef2a2 SH |
598 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
599 | WARN("failed to mount '%s'->'%s'", | |
600 | pty_info->name, path); | |
601 | continue; | |
602 | } | |
13954cce | 603 | |
7c6ef2a2 SH |
604 | snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
605 | ret = symlink(lxcpath, path); | |
606 | if (ret) { | |
607 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
608 | return -1; | |
609 | } | |
610 | } else { | |
611 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { | |
612 | WARN("failed to mount '%s'->'%s'", | |
613 | pty_info->name, path); | |
614 | continue; | |
615 | } | |
b0a33c1e | 616 | } |
617 | } | |
618 | ||
cd54d859 DL |
619 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
620 | ||
b0a33c1e | 621 | return 0; |
622 | } | |
623 | ||
7a7ff0c6 | 624 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
625 | { |
626 | struct lxc_list *mountlist, *listentry, *iterator; | |
627 | char *pivotdir, *mountpoint, *mountentry; | |
628 | int found; | |
629 | void **cbparm; | |
630 | ||
631 | mountentry = buffer; | |
632 | cbparm = (void **)data; | |
633 | ||
634 | mountlist = cbparm[0]; | |
635 | pivotdir = cbparm[1]; | |
636 | ||
637 | /* parse entry, first field is mountname, ignore */ | |
638 | mountpoint = strtok(mountentry, " "); | |
639 | if (!mountpoint) | |
640 | return -1; | |
641 | ||
642 | /* second field is mountpoint */ | |
643 | mountpoint = strtok(NULL, " "); | |
644 | if (!mountpoint) | |
645 | return -1; | |
646 | ||
647 | /* only consider mountpoints below old root fs */ | |
648 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
649 | return 0; | |
650 | ||
651 | /* filter duplicate mountpoints */ | |
652 | found = 0; | |
653 | lxc_list_for_each(iterator, mountlist) { | |
654 | if (!strcmp(iterator->elem, mountpoint)) { | |
655 | found = 1; | |
656 | break; | |
657 | } | |
658 | } | |
659 | if (found) | |
660 | return 0; | |
661 | ||
662 | /* add entry to list */ | |
663 | listentry = malloc(sizeof(*listentry)); | |
664 | if (!listentry) { | |
665 | SYSERROR("malloc for mountpoint listentry failed"); | |
666 | return -1; | |
667 | } | |
668 | ||
669 | listentry->elem = strdup(mountpoint); | |
670 | if (!listentry->elem) { | |
671 | SYSERROR("strdup failed"); | |
672 | return -1; | |
673 | } | |
674 | lxc_list_add_tail(mountlist, listentry); | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
cc6f6dd7 | 679 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 680 | { |
2382ecff | 681 | char path[MAXPATHLEN]; |
bf601689 MH |
682 | void *cbparm[2]; |
683 | struct lxc_list mountlist, *iterator; | |
684 | int ok, still_mounted, last_still_mounted; | |
bf601689 MH |
685 | |
686 | /* read and parse /proc/mounts in old root fs */ | |
687 | lxc_list_init(&mountlist); | |
688 | ||
cc6f6dd7 DL |
689 | /* oldrootfs is on the top tree directory now */ |
690 | snprintf(path, sizeof(path), "/%s", oldrootfs); | |
bf601689 | 691 | cbparm[0] = &mountlist; |
bf601689 | 692 | |
cc6f6dd7 | 693 | cbparm[1] = strdup(path); |
bf601689 MH |
694 | if (!cbparm[1]) { |
695 | SYSERROR("strdup failed"); | |
696 | return -1; | |
697 | } | |
698 | ||
cc6f6dd7 DL |
699 | snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
700 | ||
701 | ok = lxc_file_for_each_line(path, | |
702 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
703 | if (ok < 0) { |
704 | SYSERROR("failed to read or parse mount list '%s'", path); | |
705 | return -1; | |
706 | } | |
707 | ||
708 | /* umount filesystems until none left or list no longer shrinks */ | |
709 | still_mounted = 0; | |
710 | do { | |
711 | last_still_mounted = still_mounted; | |
712 | still_mounted = 0; | |
713 | ||
714 | lxc_list_for_each(iterator, &mountlist) { | |
715 | ||
c08556c6 | 716 | /* umount normally */ |
bf601689 MH |
717 | if (!umount(iterator->elem)) { |
718 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
719 | lxc_list_del(iterator); | |
720 | continue; | |
721 | } | |
722 | ||
bf601689 MH |
723 | still_mounted++; |
724 | } | |
7df119ee | 725 | |
bf601689 MH |
726 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
727 | ||
7df119ee | 728 | |
c08556c6 DL |
729 | lxc_list_for_each(iterator, &mountlist) { |
730 | ||
731 | /* let's try a lazy umount */ | |
732 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
733 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
734 | continue; | |
735 | } | |
736 | ||
737 | /* be more brutal (nfs) */ | |
738 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
739 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
740 | continue; | |
741 | } | |
742 | ||
7df119ee | 743 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 744 | } |
bf601689 | 745 | |
cc6f6dd7 DL |
746 | return 0; |
747 | } | |
748 | ||
749 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
750 | { | |
751 | char path[MAXPATHLEN]; | |
752 | int remove_pivotdir = 0; | |
753 | ||
754 | /* change into new root fs */ | |
755 | if (chdir(rootfs)) { | |
756 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
757 | return -1; | |
758 | } | |
759 | ||
760 | if (!pivotdir) | |
3103609d | 761 | pivotdir = "mnt"; |
cc6f6dd7 | 762 | |
4f9293b1 | 763 | /* compute the full path to pivotdir under rootfs */ |
cc6f6dd7 DL |
764 | snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
765 | ||
766 | if (access(path, F_OK)) { | |
767 | ||
768 | if (mkdir_p(path, 0755)) { | |
769 | SYSERROR("failed to create pivotdir '%s'", path); | |
770 | return -1; | |
771 | } | |
772 | ||
773 | remove_pivotdir = 1; | |
774 | DEBUG("created '%s' directory", path); | |
775 | } | |
776 | ||
777 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
778 | ||
779 | /* pivot_root into our new root fs */ | |
780 | if (pivot_root(".", path)) { | |
781 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
782 | return -1; |
783 | } | |
cc6f6dd7 DL |
784 | |
785 | if (chdir("/")) { | |
786 | SYSERROR("can't chdir to / after pivot_root"); | |
787 | return -1; | |
788 | } | |
789 | ||
790 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
791 | ||
792 | /* we switch from absolute path to relative path */ | |
793 | if (umount_oldrootfs(pivotdir)) | |
794 | return -1; | |
bf601689 | 795 | |
c08556c6 DL |
796 | /* remove temporary mount point, we don't consider the removing |
797 | * as fatal */ | |
a91d897a FW |
798 | if (remove_pivotdir && rmdir(pivotdir)) |
799 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 800 | |
bf601689 MH |
801 | return 0; |
802 | } | |
803 | ||
33fcb7a0 | 804 | static int setup_rootfs(const struct lxc_rootfs *rootfs) |
0ad19a3f | 805 | { |
33fcb7a0 | 806 | if (!rootfs->path) |
c69bd12f | 807 | return 0; |
0ad19a3f | 808 | |
12297168 | 809 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 810 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 811 | rootfs->mount); |
b1789442 DL |
812 | return -1; |
813 | } | |
814 | ||
2656d231 | 815 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 816 | ERROR("failed to mount rootfs"); |
c3f0a28c | 817 | return -1; |
818 | } | |
0ad19a3f | 819 | |
12297168 | 820 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 821 | |
ac778708 DL |
822 | return 0; |
823 | } | |
824 | ||
825 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
826 | { | |
ac778708 DL |
827 | if (!rootfs->path) |
828 | return 0; | |
829 | ||
12297168 | 830 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 831 | ERROR("failed to setup pivot root"); |
25368b52 | 832 | return -1; |
c69bd12f DL |
833 | } |
834 | ||
25368b52 | 835 | return 0; |
0ad19a3f | 836 | } |
837 | ||
d852c78c | 838 | static int setup_pts(int pts) |
3c26f34e | 839 | { |
77890c6d SW |
840 | char target[PATH_MAX]; |
841 | ||
d852c78c DL |
842 | if (!pts) |
843 | return 0; | |
3c26f34e | 844 | |
845 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 846 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 847 | return -1; |
848 | } | |
849 | ||
a6afdde9 DL |
850 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
851 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 852 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 853 | return -1; |
854 | } | |
855 | ||
3c26f34e | 856 | if (access("/dev/ptmx", F_OK)) { |
857 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
858 | goto out; | |
36eb9bde | 859 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 860 | return -1; |
861 | } | |
862 | ||
77890c6d SW |
863 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
864 | goto out; | |
865 | ||
3c26f34e | 866 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
867 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 868 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 869 | return -1; |
870 | } | |
cd54d859 DL |
871 | |
872 | INFO("created new pts instance"); | |
d852c78c | 873 | |
3c26f34e | 874 | out: |
875 | return 0; | |
876 | } | |
877 | ||
cccc74b5 DL |
878 | static int setup_personality(int persona) |
879 | { | |
880 | if (persona == -1) | |
881 | return 0; | |
882 | ||
883 | if (personality(persona) < 0) { | |
884 | SYSERROR("failed to set personality to '0x%x'", persona); | |
885 | return -1; | |
886 | } | |
887 | ||
888 | INFO("set personality to '0x%x'", persona); | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
7c6ef2a2 | 893 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 894 | const struct lxc_console *console) |
6e590161 | 895 | { |
63376d7d DL |
896 | char path[MAXPATHLEN]; |
897 | struct stat s; | |
7c6ef2a2 | 898 | int ret; |
52e35957 | 899 | |
7c6ef2a2 SH |
900 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
901 | if (ret >= sizeof(path)) { | |
902 | ERROR("console path too long\n"); | |
903 | return -1; | |
904 | } | |
52e35957 | 905 | |
63376d7d | 906 | if (access(path, F_OK)) { |
466978b0 | 907 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 908 | return 0; |
52e35957 DL |
909 | } |
910 | ||
f78a1f32 | 911 | if (console->peer == -1) { |
63376d7d | 912 | INFO("no console output required"); |
f78a1f32 DL |
913 | return 0; |
914 | } | |
ed502555 | 915 | |
63376d7d DL |
916 | if (stat(path, &s)) { |
917 | SYSERROR("failed to stat '%s'", path); | |
918 | return -1; | |
919 | } | |
920 | ||
921 | if (chmod(console->name, s.st_mode)) { | |
922 | SYSERROR("failed to set mode '0%o' to '%s'", | |
923 | s.st_mode, console->name); | |
924 | return -1; | |
925 | } | |
13954cce | 926 | |
63376d7d DL |
927 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
928 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 929 | return -1; |
930 | } | |
931 | ||
63376d7d | 932 | INFO("console has been setup"); |
7c6ef2a2 SH |
933 | return 0; |
934 | } | |
935 | ||
936 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
937 | const struct lxc_console *console, | |
938 | char *ttydir) | |
939 | { | |
940 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
941 | int ret; | |
942 | ||
943 | /* create rootfs/dev/<ttydir> directory */ | |
944 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
945 | ttydir); | |
946 | if (ret >= sizeof(path)) | |
947 | return -1; | |
948 | ret = mkdir(path, 0755); | |
949 | if (ret && errno != EEXIST) { | |
950 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
951 | return -1; | |
952 | } | |
953 | INFO("created %s\n", path); | |
954 | ||
955 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
956 | rootfs->mount, ttydir); | |
957 | if (ret >= sizeof(lxcpath)) { | |
958 | ERROR("console path too long\n"); | |
959 | return -1; | |
960 | } | |
961 | ||
962 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
963 | ret = unlink(path); | |
964 | if (ret && errno != ENOENT) { | |
965 | SYSERROR("error unlinking %s\n", path); | |
966 | return -1; | |
967 | } | |
968 | ||
969 | ret = creat(lxcpath, 0660); | |
970 | if (ret==-1 && errno != EEXIST) { | |
971 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
972 | return -1; | |
973 | } | |
974 | close(ret); | |
975 | ||
976 | if (console->peer == -1) { | |
977 | INFO("no console output required"); | |
978 | return 0; | |
979 | } | |
980 | ||
981 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
982 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
983 | return -1; | |
984 | } | |
985 | ||
986 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
987 | snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); | |
988 | ret = symlink(lxcpath, path); | |
989 | if (ret) { | |
990 | SYSERROR("failed to create symlink for console"); | |
991 | return -1; | |
992 | } | |
993 | ||
994 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 995 | |
6e590161 | 996 | return 0; |
997 | } | |
998 | ||
7c6ef2a2 SH |
999 | static int setup_console(const struct lxc_rootfs *rootfs, |
1000 | const struct lxc_console *console, | |
1001 | char *ttydir) | |
1002 | { | |
1003 | /* We don't have a rootfs, /dev/console will be shared */ | |
1004 | if (!rootfs->path) | |
1005 | return 0; | |
1006 | if (!ttydir) | |
1007 | return setup_dev_console(rootfs, console); | |
1008 | ||
1009 | return setup_ttydir_console(rootfs, console, ttydir); | |
1010 | } | |
1011 | ||
102a5303 | 1012 | static int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 1013 | { |
102a5303 DL |
1014 | struct lxc_list *iterator; |
1015 | struct lxc_cgroup *cg; | |
88329c69 | 1016 | int ret = -1; |
6f4a3756 | 1017 | |
102a5303 DL |
1018 | if (lxc_list_empty(cgroups)) |
1019 | return 0; | |
6f4a3756 | 1020 | |
102a5303 | 1021 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 1022 | |
102a5303 | 1023 | cg = iterator->elem; |
6f4a3756 | 1024 | |
102a5303 | 1025 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 1026 | goto out; |
6f4a3756 | 1027 | |
102a5303 | 1028 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 1029 | } |
13954cce | 1030 | |
88329c69 | 1031 | ret = 0; |
cd54d859 | 1032 | INFO("cgroup has been setup"); |
88329c69 MN |
1033 | out: |
1034 | return ret; | |
576f946d | 1035 | } |
1036 | ||
998ac676 RT |
1037 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
1038 | { | |
1039 | struct mount_opt *mo; | |
1040 | ||
1041 | /* If opt is found in mount_opt, set or clear flags. | |
1042 | * Otherwise append it to data. */ | |
1043 | ||
1044 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1045 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1046 | if (mo->clear) | |
1047 | *flags &= ~mo->flag; | |
1048 | else | |
1049 | *flags |= mo->flag; | |
1050 | return; | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | if (strlen(*data)) | |
1055 | strcat(*data, ","); | |
1056 | strcat(*data, opt); | |
1057 | } | |
1058 | ||
911324ef | 1059 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1060 | char **mntdata) |
1061 | { | |
1062 | char *s, *data; | |
1063 | char *p, *saveptr = NULL; | |
1064 | ||
911324ef | 1065 | *mntdata = NULL; |
91656ce5 | 1066 | *mntflags = 0L; |
911324ef DL |
1067 | |
1068 | if (!mntopts) | |
998ac676 RT |
1069 | return 0; |
1070 | ||
911324ef | 1071 | s = strdup(mntopts); |
998ac676 | 1072 | if (!s) { |
36eb9bde | 1073 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1074 | return -1; |
1075 | } | |
1076 | ||
1077 | data = malloc(strlen(s) + 1); | |
1078 | if (!data) { | |
36eb9bde | 1079 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1080 | free(s); |
1081 | return -1; | |
1082 | } | |
1083 | *data = 0; | |
1084 | ||
1085 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1086 | p = strtok_r(NULL, ",", &saveptr)) | |
1087 | parse_mntopt(p, mntflags, &data); | |
1088 | ||
1089 | if (*data) | |
1090 | *mntdata = data; | |
1091 | else | |
1092 | free(data); | |
1093 | free(s); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
911324ef DL |
1098 | static int mount_entry(const char *fsname, const char *target, |
1099 | const char *fstype, unsigned long mountflags, | |
1100 | const char *data) | |
1101 | { | |
1102 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1103 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1104 | return -1; | |
1105 | } | |
1106 | ||
1107 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1108 | ||
1109 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1110 | fsname, target); | |
1111 | ||
1112 | if (mount(fsname, target, fstype, | |
1113 | mountflags | MS_REMOUNT, data)) { | |
1114 | SYSERROR("failed to mount '%s' on '%s'", | |
1115 | fsname, target); | |
1116 | return -1; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1121 | ||
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1126 | { |
998ac676 RT |
1127 | unsigned long mntflags; |
1128 | char *mntdata; | |
911324ef DL |
1129 | int ret; |
1130 | ||
1131 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1132 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1133 | return -1; | |
1134 | } | |
1135 | ||
1136 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1137 | mntent->mnt_type, mntflags, mntdata); | |
1138 | ||
1139 | free(mntdata); | |
1140 | ||
1141 | return ret; | |
1142 | } | |
1143 | ||
1144 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
013bd428 | 1145 | const struct lxc_rootfs *rootfs) |
911324ef | 1146 | { |
013bd428 | 1147 | char *aux; |
59760f5d | 1148 | char path[MAXPATHLEN]; |
911324ef DL |
1149 | unsigned long mntflags; |
1150 | char *mntdata; | |
013bd428 | 1151 | int ret = 0; |
0ad19a3f | 1152 | |
911324ef DL |
1153 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1154 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1155 | return -1; | |
1156 | } | |
1bc60a65 | 1157 | |
013bd428 DL |
1158 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1159 | if (!aux) { | |
1160 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1161 | goto out; | |
1162 | } | |
1163 | ||
071a2b8c | 1164 | snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
013bd428 | 1165 | aux + strlen(rootfs->path)); |
d330fe7b | 1166 | |
013bd428 | 1167 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1168 | mntflags, mntdata); |
0ad19a3f | 1169 | |
013bd428 | 1170 | out: |
911324ef DL |
1171 | free(mntdata); |
1172 | return ret; | |
1173 | } | |
d330fe7b | 1174 | |
911324ef DL |
1175 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1176 | const char *rootfs) | |
1177 | { | |
1178 | char path[MAXPATHLEN]; | |
1179 | unsigned long mntflags; | |
1180 | char *mntdata; | |
1181 | int ret; | |
d330fe7b | 1182 | |
911324ef DL |
1183 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1184 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1185 | return -1; | |
1186 | } | |
d330fe7b | 1187 | |
911324ef DL |
1188 | /* relative to root mount point */ |
1189 | snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); | |
1190 | ||
1191 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1192 | mntflags, mntdata); | |
1193 | ||
1194 | free(mntdata); | |
998ac676 | 1195 | |
911324ef DL |
1196 | return ret; |
1197 | } | |
1198 | ||
1199 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file) | |
1200 | { | |
1201 | struct mntent *mntent; | |
1202 | int ret = -1; | |
e76b8764 | 1203 | |
911324ef | 1204 | while ((mntent = getmntent(file))) { |
e76b8764 | 1205 | |
911324ef DL |
1206 | if (!rootfs->path) { |
1207 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1208 | goto out; |
911324ef | 1209 | continue; |
e76b8764 CDC |
1210 | } |
1211 | ||
911324ef DL |
1212 | /* We have a separate root, mounts are relative to it */ |
1213 | if (mntent->mnt_dir[0] != '/') { | |
1214 | if (mount_entry_on_relative_rootfs(mntent, | |
1215 | rootfs->mount)) | |
1216 | goto out; | |
1217 | continue; | |
1218 | } | |
cd54d859 | 1219 | |
013bd428 | 1220 | if (mount_entry_on_absolute_rootfs(mntent, rootfs)) |
911324ef | 1221 | goto out; |
0ad19a3f | 1222 | } |
cd54d859 | 1223 | |
0ad19a3f | 1224 | ret = 0; |
cd54d859 DL |
1225 | |
1226 | INFO("mount points have been setup"); | |
0ad19a3f | 1227 | out: |
e7938e9e MN |
1228 | return ret; |
1229 | } | |
1230 | ||
59760f5d | 1231 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab) |
e7938e9e MN |
1232 | { |
1233 | FILE *file; | |
1234 | int ret; | |
1235 | ||
1236 | if (!fstab) | |
1237 | return 0; | |
1238 | ||
1239 | file = setmntent(fstab, "r"); | |
1240 | if (!file) { | |
1241 | SYSERROR("failed to use '%s'", fstab); | |
1242 | return -1; | |
1243 | } | |
1244 | ||
59760f5d | 1245 | ret = mount_file_entries(rootfs, file); |
e7938e9e | 1246 | |
0ad19a3f | 1247 | endmntent(file); |
1248 | return ret; | |
1249 | } | |
1250 | ||
59760f5d | 1251 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount) |
e7938e9e MN |
1252 | { |
1253 | FILE *file; | |
1254 | struct lxc_list *iterator; | |
1255 | char *mount_entry; | |
1256 | int ret; | |
1257 | ||
1258 | file = tmpfile(); | |
1259 | if (!file) { | |
1260 | ERROR("tmpfile error: %m"); | |
1261 | return -1; | |
1262 | } | |
1263 | ||
1264 | lxc_list_for_each(iterator, mount) { | |
1265 | mount_entry = iterator->elem; | |
1d6b1976 | 1266 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1267 | } |
1268 | ||
1269 | rewind(file); | |
1270 | ||
59760f5d | 1271 | ret = mount_file_entries(rootfs, file); |
e7938e9e MN |
1272 | |
1273 | fclose(file); | |
1274 | return ret; | |
1275 | } | |
1276 | ||
81810dd1 DL |
1277 | static int setup_caps(struct lxc_list *caps) |
1278 | { | |
1279 | struct lxc_list *iterator; | |
1280 | char *drop_entry; | |
d55bc1ad | 1281 | char *ptr; |
81810dd1 DL |
1282 | int i, capid; |
1283 | ||
1284 | lxc_list_for_each(iterator, caps) { | |
1285 | ||
1286 | drop_entry = iterator->elem; | |
1287 | ||
1288 | capid = -1; | |
1289 | ||
1290 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1291 | ||
1292 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1293 | continue; | |
1294 | ||
1295 | capid = caps_opt[i].value; | |
1296 | break; | |
1297 | } | |
1298 | ||
d55bc1ad CS |
1299 | if (capid < 0) { |
1300 | /* try to see if it's numeric, so the user may specify | |
1301 | * capabilities that the running kernel knows about but | |
1302 | * we don't */ | |
1303 | capid = strtol(drop_entry, &ptr, 10); | |
1304 | if (!ptr || *ptr != '\0' || | |
1305 | capid == LONG_MIN || capid == LONG_MAX) | |
1306 | /* not a valid number */ | |
1307 | capid = -1; | |
1308 | else if (capid > lxc_caps_last_cap()) | |
1309 | /* we have a number but it's not a valid | |
1310 | * capability */ | |
1311 | capid = -1; | |
1312 | } | |
1313 | ||
81810dd1 | 1314 | if (capid < 0) { |
1e11be34 DL |
1315 | ERROR("unknown capability %s", drop_entry); |
1316 | return -1; | |
81810dd1 DL |
1317 | } |
1318 | ||
1319 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1320 | ||
1321 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1322 | SYSERROR("failed to remove %s capability", drop_entry); | |
1323 | return -1; | |
1324 | } | |
1325 | ||
1326 | } | |
1327 | ||
1328 | DEBUG("capabilities has been setup"); | |
1329 | ||
1330 | return 0; | |
1331 | } | |
1332 | ||
0ad19a3f | 1333 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1334 | { | |
1335 | struct sockaddr sockaddr; | |
1336 | struct ifreq ifr; | |
1337 | int ret, fd; | |
1338 | ||
3cfc0f3a MN |
1339 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1340 | if (ret) { | |
1341 | ERROR("mac address '%s' conversion failed : %s", | |
1342 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1343 | return -1; |
1344 | } | |
1345 | ||
1346 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1347 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1348 | ||
1349 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1350 | if (fd < 0) { | |
3ab87b66 | 1351 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1352 | return -1; |
1353 | } | |
1354 | ||
1355 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1356 | close(fd); | |
1357 | if (ret) | |
3ab87b66 | 1358 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1359 | |
cd54d859 DL |
1360 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1361 | ||
0ad19a3f | 1362 | return ret; |
1363 | } | |
1364 | ||
82d5ae15 | 1365 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1366 | { |
82d5ae15 DL |
1367 | struct lxc_list *iterator; |
1368 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1369 | int err; |
0ad19a3f | 1370 | |
82d5ae15 DL |
1371 | lxc_list_for_each(iterator, ip) { |
1372 | ||
1373 | inetdev = iterator->elem; | |
1374 | ||
0093bb8c DL |
1375 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1376 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1377 | if (err) { |
1378 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1379 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1380 | return -1; |
1381 | } | |
1382 | } | |
1383 | ||
1384 | return 0; | |
0ad19a3f | 1385 | } |
1386 | ||
82d5ae15 | 1387 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1388 | { |
82d5ae15 | 1389 | struct lxc_list *iterator; |
7fa9074f | 1390 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1391 | int err; |
0ad19a3f | 1392 | |
82d5ae15 DL |
1393 | lxc_list_for_each(iterator, ip) { |
1394 | ||
1395 | inet6dev = iterator->elem; | |
1396 | ||
b3df193c | 1397 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1398 | &inet6dev->mcast, &inet6dev->acast, |
1399 | inet6dev->prefix); | |
3cfc0f3a MN |
1400 | if (err) { |
1401 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1402 | ifindex, strerror(-err)); | |
82d5ae15 | 1403 | return -1; |
3cfc0f3a | 1404 | } |
82d5ae15 DL |
1405 | } |
1406 | ||
1407 | return 0; | |
0ad19a3f | 1408 | } |
1409 | ||
82d5ae15 | 1410 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1411 | { |
0ad19a3f | 1412 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1413 | char *current_ifname = ifname; |
3cfc0f3a | 1414 | int err; |
0ad19a3f | 1415 | |
82d5ae15 DL |
1416 | /* empty network namespace */ |
1417 | if (!netdev->ifindex) { | |
b0efbac4 | 1418 | if (netdev->flags & IFF_UP) { |
d472214b | 1419 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1420 | if (err) { |
1421 | ERROR("failed to set the loopback up : %s", | |
1422 | strerror(-err)); | |
82d5ae15 DL |
1423 | return -1; |
1424 | } | |
82d5ae15 | 1425 | } |
7b57e8b6 | 1426 | return 0; |
0ad19a3f | 1427 | } |
13954cce | 1428 | |
82d5ae15 DL |
1429 | /* retrieve the name of the interface */ |
1430 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1431 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1432 | netdev->ifindex); |
0ad19a3f | 1433 | return -1; |
1434 | } | |
13954cce | 1435 | |
018ef520 | 1436 | /* default: let the system to choose one interface name */ |
9d083402 | 1437 | if (!netdev->name) |
fb6d9b2f DL |
1438 | netdev->name = netdev->type == LXC_NET_PHYS ? |
1439 | netdev->link : "eth%d"; | |
018ef520 | 1440 | |
82d5ae15 | 1441 | /* rename the interface name */ |
b84f58b9 | 1442 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
1443 | if (err) { |
1444 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1445 | strerror(-err)); | |
018ef520 DL |
1446 | return -1; |
1447 | } | |
1448 | ||
1449 | /* Re-read the name of the interface because its name has changed | |
1450 | * and would be automatically allocated by the system | |
1451 | */ | |
82d5ae15 | 1452 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1453 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1454 | netdev->ifindex); |
018ef520 | 1455 | return -1; |
0ad19a3f | 1456 | } |
1457 | ||
82d5ae15 DL |
1458 | /* set a mac address */ |
1459 | if (netdev->hwaddr) { | |
1460 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1461 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1462 | current_ifname); |
0ad19a3f | 1463 | return -1; |
1464 | } | |
1465 | } | |
1466 | ||
82d5ae15 DL |
1467 | /* setup ipv4 addresses on the interface */ |
1468 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1469 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1470 | ifname); |
1471 | return -1; | |
1472 | } | |
1473 | ||
82d5ae15 DL |
1474 | /* setup ipv6 addresses on the interface */ |
1475 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1476 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1477 | ifname); |
1478 | return -1; | |
1479 | } | |
1480 | ||
82d5ae15 | 1481 | /* set the network device up */ |
b0efbac4 | 1482 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1483 | int err; |
1484 | ||
d472214b | 1485 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
1486 | if (err) { |
1487 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1488 | strerror(-err)); | |
0ad19a3f | 1489 | return -1; |
1490 | } | |
1491 | ||
1492 | /* the network is up, make the loopback up too */ | |
d472214b | 1493 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1494 | if (err) { |
1495 | ERROR("failed to set the loopback up : %s", | |
1496 | strerror(-err)); | |
0ad19a3f | 1497 | return -1; |
1498 | } | |
1499 | } | |
1500 | ||
f8fee0e2 MK |
1501 | /* We can only set up the default routes after bringing |
1502 | * up the interface, sine bringing up the interface adds | |
1503 | * the link-local routes and we can't add a default | |
1504 | * route if the gateway is not reachable. */ | |
1505 | ||
1506 | /* setup ipv4 gateway on the interface */ | |
1507 | if (netdev->ipv4_gateway) { | |
1508 | if (!(netdev->flags & IFF_UP)) { | |
1509 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
1510 | return -1; | |
1511 | } | |
1512 | ||
1513 | if (lxc_list_empty(&netdev->ipv4)) { | |
1514 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
1515 | return -1; | |
1516 | } | |
1517 | ||
1518 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
1519 | if (err) { | |
1520 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
1521 | ifname, strerror(-err)); | |
19a26f82 MK |
1522 | if (netdev->ipv4_gateway_auto) { |
1523 | char buf[INET_ADDRSTRLEN]; | |
1524 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
1525 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
1526 | } | |
f8fee0e2 MK |
1527 | return -1; |
1528 | } | |
1529 | } | |
1530 | ||
1531 | /* setup ipv6 gateway on the interface */ | |
1532 | if (netdev->ipv6_gateway) { | |
1533 | if (!(netdev->flags & IFF_UP)) { | |
1534 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
1535 | return -1; | |
1536 | } | |
1537 | ||
1538 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
1539 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
1540 | return -1; | |
1541 | } | |
1542 | ||
1543 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
1544 | if (err) { | |
1545 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
1546 | ifname, strerror(-err)); | |
19a26f82 MK |
1547 | if (netdev->ipv6_gateway_auto) { |
1548 | char buf[INET6_ADDRSTRLEN]; | |
1549 | inet_ntop(AF_INET, netdev->ipv6_gateway, buf, sizeof(buf)); | |
1550 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); | |
1551 | } | |
f8fee0e2 MK |
1552 | return -1; |
1553 | } | |
1554 | } | |
1555 | ||
cd54d859 DL |
1556 | DEBUG("'%s' has been setup", current_ifname); |
1557 | ||
0ad19a3f | 1558 | return 0; |
1559 | } | |
1560 | ||
5f4535a3 | 1561 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1562 | { |
82d5ae15 | 1563 | struct lxc_list *iterator; |
82d5ae15 | 1564 | struct lxc_netdev *netdev; |
0ad19a3f | 1565 | |
5f4535a3 | 1566 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1567 | |
5f4535a3 | 1568 | netdev = iterator->elem; |
82d5ae15 DL |
1569 | |
1570 | if (setup_netdev(netdev)) { | |
1571 | ERROR("failed to setup netdev"); | |
1572 | return -1; | |
1573 | } | |
1574 | } | |
cd54d859 | 1575 | |
5f4535a3 DL |
1576 | if (!lxc_list_empty(network)) |
1577 | INFO("network has been setup"); | |
cd54d859 DL |
1578 | |
1579 | return 0; | |
0ad19a3f | 1580 | } |
1581 | ||
49684c0b CS |
1582 | static int setup_private_host_hw_addr(char *veth1) |
1583 | { | |
1584 | struct ifreq ifr; | |
1585 | int err; | |
1586 | int sockfd; | |
1587 | ||
1588 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
1589 | if (sockfd < 0) | |
1590 | return -errno; | |
1591 | ||
1592 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
1593 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
1594 | if (err < 0) { | |
1595 | close(sockfd); | |
1596 | return -errno; | |
1597 | } | |
1598 | ||
1599 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
1600 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
1601 | close(sockfd); | |
1602 | if (err < 0) | |
1603 | return -errno; | |
1604 | ||
7ad84da7 DL |
1605 | DEBUG("mac address of host interface '%s' changed to private " |
1606 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
1607 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
1608 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
1609 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
1610 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
1611 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
1612 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
1613 | |
1614 | return 0; | |
1615 | } | |
1616 | ||
7b379ab3 | 1617 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 1618 | { |
7b379ab3 MN |
1619 | struct lxc_conf *new; |
1620 | ||
1621 | new = malloc(sizeof(*new)); | |
1622 | if (!new) { | |
1623 | ERROR("lxc_conf_init : %m"); | |
1624 | return NULL; | |
1625 | } | |
1626 | memset(new, 0, sizeof(*new)); | |
1627 | ||
cccc74b5 | 1628 | new->personality = -1; |
28a4b0e5 | 1629 | new->console.path = NULL; |
63376d7d DL |
1630 | new->console.peer = -1; |
1631 | new->console.master = -1; | |
1632 | new->console.slave = -1; | |
1633 | new->console.name[0] = '\0'; | |
12297168 | 1634 | new->rootfs.mount = LXCROOTFSMOUNT; |
7b379ab3 MN |
1635 | lxc_list_init(&new->cgroup); |
1636 | lxc_list_init(&new->network); | |
1637 | lxc_list_init(&new->mount_list); | |
81810dd1 | 1638 | lxc_list_init(&new->caps); |
7b379ab3 MN |
1639 | |
1640 | return new; | |
089cd8b8 DL |
1641 | } |
1642 | ||
e3b4c4c4 | 1643 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1644 | { |
8634bc19 | 1645 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 1646 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 1647 | int err; |
13954cce | 1648 | |
e892973e DL |
1649 | if (netdev->priv.veth_attr.pair) |
1650 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 MT |
1651 | else { |
1652 | snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
0e391e57 | 1653 | veth1 = mktemp(veth1buf); |
8634bc19 | 1654 | } |
82d5ae15 | 1655 | |
0e391e57 DL |
1656 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
1657 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
1658 | |
1659 | if (!strlen(veth1) || !strlen(veth2)) { | |
1660 | ERROR("failed to allocate a temporary name"); | |
1661 | return -1; | |
0ad19a3f | 1662 | } |
1663 | ||
3cfc0f3a MN |
1664 | err = lxc_veth_create(veth1, veth2); |
1665 | if (err) { | |
1666 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
1667 | strerror(-err)); | |
6ab9ab6d | 1668 | return -1; |
0ad19a3f | 1669 | } |
13954cce | 1670 | |
49684c0b CS |
1671 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
1672 | * will always keep the host's mac address and not take the mac address | |
1673 | * of a container */ | |
1674 | err = setup_private_host_hw_addr(veth1); | |
1675 | if (err) { | |
1676 | ERROR("failed to change mac address of host interface '%s' : %s", | |
1677 | veth1, strerror(-err)); | |
1678 | goto out_delete; | |
1679 | } | |
1680 | ||
82d5ae15 | 1681 | if (netdev->mtu) { |
d472214b | 1682 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 1683 | if (!err) |
d472214b | 1684 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
1685 | if (err) { |
1686 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
1687 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 1688 | goto out_delete; |
75d09f83 DL |
1689 | } |
1690 | } | |
1691 | ||
3cfc0f3a MN |
1692 | if (netdev->link) { |
1693 | err = lxc_bridge_attach(netdev->link, veth1); | |
1694 | if (err) { | |
1695 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
1696 | veth1, netdev->link, strerror(-err)); | |
1697 | goto out_delete; | |
1698 | } | |
eb14c10a DL |
1699 | } |
1700 | ||
82d5ae15 DL |
1701 | netdev->ifindex = if_nametoindex(veth2); |
1702 | if (!netdev->ifindex) { | |
36eb9bde | 1703 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
1704 | goto out_delete; |
1705 | } | |
1706 | ||
d472214b | 1707 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
1708 | if (err) { |
1709 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
1710 | goto out_delete; | |
0ad19a3f | 1711 | } |
1712 | ||
e3b4c4c4 | 1713 | if (netdev->upscript) { |
751d9dcd DL |
1714 | err = run_script(handler->name, "net", netdev->upscript, "up", |
1715 | "veth", veth1, (char*) NULL); | |
1716 | if (err) | |
e3b4c4c4 | 1717 | goto out_delete; |
e3b4c4c4 ST |
1718 | } |
1719 | ||
82d5ae15 DL |
1720 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
1721 | veth1, veth2, netdev->ifindex); | |
1722 | ||
6ab9ab6d | 1723 | return 0; |
eb14c10a DL |
1724 | |
1725 | out_delete: | |
b84f58b9 | 1726 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 1727 | return -1; |
13954cce | 1728 | } |
d957ae2d | 1729 | |
e3b4c4c4 | 1730 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1731 | { |
0e391e57 | 1732 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 1733 | int err; |
d957ae2d MT |
1734 | |
1735 | if (!netdev->link) { | |
1736 | ERROR("no link specified for macvlan netdev"); | |
1737 | return -1; | |
1738 | } | |
13954cce | 1739 | |
0e391e57 | 1740 | snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
82d5ae15 | 1741 | |
0e391e57 | 1742 | peer = mktemp(peerbuf); |
82d5ae15 DL |
1743 | if (!strlen(peer)) { |
1744 | ERROR("failed to make a temporary name"); | |
1745 | return -1; | |
0ad19a3f | 1746 | } |
1747 | ||
3cfc0f3a MN |
1748 | err = lxc_macvlan_create(netdev->link, peer, |
1749 | netdev->priv.macvlan_attr.mode); | |
1750 | if (err) { | |
1751 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
1752 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 1753 | return -1; |
0ad19a3f | 1754 | } |
1755 | ||
82d5ae15 DL |
1756 | netdev->ifindex = if_nametoindex(peer); |
1757 | if (!netdev->ifindex) { | |
36eb9bde | 1758 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 1759 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 1760 | return -1; |
22ebac19 | 1761 | } |
1762 | ||
e3b4c4c4 | 1763 | if (netdev->upscript) { |
751d9dcd DL |
1764 | err = run_script(handler->name, "net", netdev->upscript, "up", |
1765 | "macvlan", netdev->link, (char*) NULL); | |
1766 | if (err) | |
e3b4c4c4 | 1767 | return -1; |
e3b4c4c4 ST |
1768 | } |
1769 | ||
e892973e DL |
1770 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
1771 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 1772 | |
d957ae2d | 1773 | return 0; |
0ad19a3f | 1774 | } |
1775 | ||
26c39028 | 1776 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 1777 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
1778 | { |
1779 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 1780 | int err; |
26c39028 JHS |
1781 | |
1782 | if (!netdev->link) { | |
1783 | ERROR("no link specified for vlan netdev"); | |
1784 | return -1; | |
1785 | } | |
1786 | ||
e892973e | 1787 | snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
26c39028 | 1788 | |
3cfc0f3a MN |
1789 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
1790 | if (err) { | |
1791 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
1792 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
1793 | return -1; |
1794 | } | |
1795 | ||
1796 | netdev->ifindex = if_nametoindex(peer); | |
1797 | if (!netdev->ifindex) { | |
1798 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 1799 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
1800 | return -1; |
1801 | } | |
1802 | ||
e892973e DL |
1803 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
1804 | netdev->ifindex); | |
1805 | ||
26c39028 JHS |
1806 | return 0; |
1807 | } | |
1808 | ||
e3b4c4c4 | 1809 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1810 | { |
6168e99f DL |
1811 | if (!netdev->link) { |
1812 | ERROR("no link specified for the physical interface"); | |
1813 | return -1; | |
1814 | } | |
1815 | ||
9d083402 | 1816 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 1817 | if (!netdev->ifindex) { |
9d083402 | 1818 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 1819 | return -1; |
1820 | } | |
1821 | ||
e3b4c4c4 ST |
1822 | if (netdev->upscript) { |
1823 | int err; | |
751d9dcd DL |
1824 | err = run_script(handler->name, "net", netdev->upscript, |
1825 | "up", "phys", netdev->link, (char*) NULL); | |
1826 | if (err) | |
e3b4c4c4 | 1827 | return -1; |
e3b4c4c4 ST |
1828 | } |
1829 | ||
82d5ae15 | 1830 | return 0; |
0ad19a3f | 1831 | } |
1832 | ||
e3b4c4c4 | 1833 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1834 | { |
82d5ae15 | 1835 | netdev->ifindex = 0; |
e3b4c4c4 ST |
1836 | if (netdev->upscript) { |
1837 | int err; | |
751d9dcd DL |
1838 | err = run_script(handler->name, "net", netdev->upscript, |
1839 | "up", "empty", (char*) NULL); | |
1840 | if (err) | |
e3b4c4c4 | 1841 | return -1; |
e3b4c4c4 | 1842 | } |
82d5ae15 | 1843 | return 0; |
0ad19a3f | 1844 | } |
1845 | ||
e3b4c4c4 | 1846 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 1847 | { |
e3b4c4c4 | 1848 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 1849 | struct lxc_list *iterator; |
82d5ae15 | 1850 | struct lxc_netdev *netdev; |
0ad19a3f | 1851 | |
5f4535a3 | 1852 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 1853 | |
5f4535a3 | 1854 | netdev = iterator->elem; |
13954cce | 1855 | |
24654103 | 1856 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 1857 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 1858 | netdev->type); |
82d5ae15 DL |
1859 | return -1; |
1860 | } | |
0ad19a3f | 1861 | |
e3b4c4c4 | 1862 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
1863 | ERROR("failed to create netdev"); |
1864 | return -1; | |
1865 | } | |
e3b4c4c4 | 1866 | |
0ad19a3f | 1867 | } |
1868 | ||
1869 | return 0; | |
1870 | } | |
1871 | ||
7fef7a06 DL |
1872 | void lxc_delete_network(struct lxc_list *network) |
1873 | { | |
1874 | struct lxc_list *iterator; | |
1875 | struct lxc_netdev *netdev; | |
1876 | ||
1877 | lxc_list_for_each(iterator, network) { | |
1878 | netdev = iterator->elem; | |
d472214b DL |
1879 | if (netdev->ifindex == 0) |
1880 | continue; | |
1881 | ||
d8f8e352 DL |
1882 | if (netdev->type == LXC_NET_PHYS) { |
1883 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) | |
1884 | WARN("failed to rename to the initial name the " \ | |
1885 | "netdev '%s'", netdev->link); | |
d472214b | 1886 | continue; |
d8f8e352 | 1887 | } |
d472214b | 1888 | |
d8f8e352 DL |
1889 | /* Recent kernel remove the virtual interfaces when the network |
1890 | * namespace is destroyed but in case we did not moved the | |
1891 | * interface to the network namespace, we have to destroy it | |
1892 | */ | |
1893 | if (lxc_netdev_delete_by_index(netdev->ifindex)) | |
1894 | WARN("failed to remove interface '%s'", netdev->name); | |
7fef7a06 DL |
1895 | } |
1896 | } | |
1897 | ||
5f4535a3 | 1898 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 1899 | { |
82d5ae15 | 1900 | struct lxc_list *iterator; |
82d5ae15 | 1901 | struct lxc_netdev *netdev; |
3cfc0f3a | 1902 | int err; |
0ad19a3f | 1903 | |
5f4535a3 | 1904 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 1905 | |
5f4535a3 | 1906 | netdev = iterator->elem; |
82d5ae15 | 1907 | |
236087a6 DL |
1908 | /* empty network namespace, nothing to move */ |
1909 | if (!netdev->ifindex) | |
1910 | continue; | |
1911 | ||
d472214b | 1912 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
1913 | if (err) { |
1914 | ERROR("failed to move '%s' to the container : %s", | |
1915 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
1916 | return -1; |
1917 | } | |
1918 | ||
c1c75c04 | 1919 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 1920 | } |
1921 | ||
1922 | return 0; | |
1923 | } | |
1924 | ||
19a26f82 MK |
1925 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
1926 | { | |
1927 | struct lxc_list *network = &handler->conf->network; | |
1928 | struct lxc_list *iterator; | |
1929 | struct lxc_netdev *netdev; | |
1930 | int link_index; | |
1931 | ||
1932 | lxc_list_for_each(iterator, network) { | |
1933 | netdev = iterator->elem; | |
1934 | ||
1935 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
1936 | continue; | |
1937 | ||
1938 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
1939 | ERROR("gateway = auto only supported for " | |
1940 | "veth and macvlan"); | |
1941 | return -1; | |
1942 | } | |
1943 | ||
1944 | if (!netdev->link) { | |
1945 | ERROR("gateway = auto needs a link interface"); | |
1946 | return -1; | |
1947 | } | |
1948 | ||
1949 | link_index = if_nametoindex(netdev->link); | |
1950 | if (!link_index) | |
1951 | return -EINVAL; | |
1952 | ||
1953 | if (netdev->ipv4_gateway_auto) { | |
1954 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
1955 | ERROR("failed to automatically find ipv4 gateway " | |
1956 | "address from link interface '%s'", netdev->link); | |
1957 | return -1; | |
1958 | } | |
1959 | } | |
1960 | ||
1961 | if (netdev->ipv6_gateway_auto) { | |
1962 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
1963 | ERROR("failed to automatically find ipv6 gateway " | |
1964 | "address from link interface '%s'", netdev->link); | |
1965 | return -1; | |
1966 | } | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | return 0; | |
1971 | } | |
1972 | ||
5e4a62bf | 1973 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 1974 | { |
5e4a62bf | 1975 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 1976 | int i; |
b0a33c1e | 1977 | |
5e4a62bf DL |
1978 | /* no tty in the configuration */ |
1979 | if (!conf->tty) | |
b0a33c1e | 1980 | return 0; |
1981 | ||
13954cce | 1982 | tty_info->pty_info = |
e4e7d59d | 1983 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 1984 | if (!tty_info->pty_info) { |
36eb9bde | 1985 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 1986 | return -1; |
b0a33c1e | 1987 | } |
1988 | ||
985d15b1 | 1989 | for (i = 0; i < conf->tty; i++) { |
13954cce | 1990 | |
b0a33c1e | 1991 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
1992 | ||
13954cce | 1993 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 1994 | pty_info->name, NULL, NULL)) { |
36eb9bde | 1995 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
1996 | tty_info->nbtty = i; |
1997 | lxc_delete_tty(tty_info); | |
1998 | return -1; | |
b0a33c1e | 1999 | } |
2000 | ||
5332bb84 DL |
2001 | DEBUG("allocated pty '%s' (%d/%d)", |
2002 | pty_info->name, pty_info->master, pty_info->slave); | |
2003 | ||
b035ad62 MS |
2004 | /* Prevent leaking the file descriptors to the container */ |
2005 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
2006 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
2007 | ||
b0a33c1e | 2008 | pty_info->busy = 0; |
2009 | } | |
2010 | ||
985d15b1 | 2011 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
2012 | |
2013 | INFO("tty's configured"); | |
2014 | ||
985d15b1 | 2015 | return 0; |
b0a33c1e | 2016 | } |
2017 | ||
2018 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
2019 | { | |
2020 | int i; | |
2021 | ||
2022 | for (i = 0; i < tty_info->nbtty; i++) { | |
2023 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
2024 | ||
2025 | close(pty_info->master); | |
2026 | close(pty_info->slave); | |
2027 | } | |
2028 | ||
2029 | free(tty_info->pty_info); | |
2030 | tty_info->nbtty = 0; | |
2031 | } | |
2032 | ||
571e6ec8 | 2033 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 2034 | { |
571e6ec8 | 2035 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 2036 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 2037 | return -1; |
0ad19a3f | 2038 | } |
2039 | ||
5f4535a3 | 2040 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 2041 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 2042 | return -1; |
0ad19a3f | 2043 | } |
2044 | ||
ac778708 DL |
2045 | if (setup_rootfs(&lxc_conf->rootfs)) { |
2046 | ERROR("failed to setup rootfs for '%s'", name); | |
95b5ffaf | 2047 | return -1; |
0ad19a3f | 2048 | } |
2049 | ||
59760f5d | 2050 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab)) { |
36eb9bde | 2051 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2052 | return -1; |
576f946d | 2053 | } |
2054 | ||
59760f5d | 2055 | if (setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list)) { |
e7938e9e MN |
2056 | ERROR("failed to setup the mount entries for '%s'", name); |
2057 | return -1; | |
2058 | } | |
2059 | ||
ac778708 DL |
2060 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
2061 | ERROR("failed to setup the cgroups for '%s'", name); | |
2062 | return -1; | |
2063 | } | |
2064 | ||
7c6ef2a2 | 2065 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2066 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2067 | return -1; |
6e590161 | 2068 | } |
2069 | ||
7c6ef2a2 | 2070 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2071 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2072 | return -1; |
b0a33c1e | 2073 | } |
2074 | ||
ac778708 | 2075 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2076 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2077 | return -1; |
ed502555 | 2078 | } |
2079 | ||
571e6ec8 | 2080 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2081 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2082 | return -1; |
3c26f34e | 2083 | } |
2084 | ||
cccc74b5 DL |
2085 | if (setup_personality(lxc_conf->personality)) { |
2086 | ERROR("failed to setup personality"); | |
2087 | return -1; | |
2088 | } | |
2089 | ||
81810dd1 DL |
2090 | if (setup_caps(&lxc_conf->caps)) { |
2091 | ERROR("failed to drop capabilities"); | |
2092 | return -1; | |
2093 | } | |
2094 | ||
cd54d859 DL |
2095 | NOTICE("'%s' is setup.", name); |
2096 | ||
0ad19a3f | 2097 | return 0; |
2098 | } |