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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 | ||
2656d231 | 455 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 456 | { |
b09ef133 | 457 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 458 | struct stat s; |
a6afdde9 | 459 | int i; |
78ae2fcc | 460 | |
a6afdde9 | 461 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 462 | |
463 | struct rootfs_type { | |
464 | int type; | |
465 | rootfs_cb cb; | |
466 | } rtfs_type[] = { | |
2656d231 DL |
467 | { S_IFDIR, mount_rootfs_dir }, |
468 | { S_IFBLK, mount_rootfs_block }, | |
469 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 470 | }; |
0ad19a3f | 471 | |
4c8ab83b | 472 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 473 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 474 | return -1; |
475 | } | |
b09ef133 | 476 | |
b09ef133 | 477 | if (access(absrootfs, F_OK)) { |
36eb9bde | 478 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 479 | return -1; |
480 | } | |
481 | ||
78ae2fcc | 482 | if (stat(absrootfs, &s)) { |
36eb9bde | 483 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 484 | return -1; |
485 | } | |
486 | ||
78ae2fcc | 487 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 488 | |
78ae2fcc | 489 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
490 | continue; | |
9b0f0477 | 491 | |
a6afdde9 | 492 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 493 | } |
9b0f0477 | 494 | |
36eb9bde | 495 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 496 | return -1; |
0ad19a3f | 497 | } |
498 | ||
4e5440c6 | 499 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 500 | { |
4e5440c6 DL |
501 | if (!utsname) |
502 | return 0; | |
0ad19a3f | 503 | |
4e5440c6 DL |
504 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
505 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 506 | return -1; |
507 | } | |
508 | ||
4e5440c6 | 509 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 510 | |
0ad19a3f | 511 | return 0; |
512 | } | |
513 | ||
33fcb7a0 | 514 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 515 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 516 | { |
7c6ef2a2 SH |
517 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
518 | int i, ret; | |
b0a33c1e | 519 | |
bc9bd0e3 DL |
520 | if (!rootfs->path) |
521 | return 0; | |
522 | ||
b0a33c1e | 523 | for (i = 0; i < tty_info->nbtty; i++) { |
524 | ||
525 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
526 | ||
7c6ef2a2 | 527 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 528 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
529 | if (ret >= sizeof(path)) { |
530 | ERROR("pathname too long for ttys"); | |
531 | return -1; | |
532 | } | |
533 | if (ttydir) { | |
534 | /* create dev/lxc/tty%d" */ | |
535 | snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", | |
536 | rootfs->mount, ttydir, i + 1); | |
537 | if (ret >= sizeof(lxcpath)) { | |
538 | ERROR("pathname too long for ttys"); | |
539 | return -1; | |
540 | } | |
541 | ret = creat(lxcpath, 0660); | |
542 | if (ret==-1 && errno != EEXIST) { | |
543 | SYSERROR("error creating %s\n", lxcpath); | |
544 | return -1; | |
545 | } | |
546 | close(ret); | |
547 | ret = unlink(path); | |
548 | if (ret && errno != ENOENT) { | |
549 | SYSERROR("error unlinking %s\n", path); | |
550 | return -1; | |
551 | } | |
b0a33c1e | 552 | |
7c6ef2a2 SH |
553 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
554 | WARN("failed to mount '%s'->'%s'", | |
555 | pty_info->name, path); | |
556 | continue; | |
557 | } | |
13954cce | 558 | |
7c6ef2a2 SH |
559 | snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
560 | ret = symlink(lxcpath, path); | |
561 | if (ret) { | |
562 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
563 | return -1; | |
564 | } | |
565 | } else { | |
566 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { | |
567 | WARN("failed to mount '%s'->'%s'", | |
568 | pty_info->name, path); | |
569 | continue; | |
570 | } | |
b0a33c1e | 571 | } |
572 | } | |
573 | ||
cd54d859 DL |
574 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
575 | ||
b0a33c1e | 576 | return 0; |
577 | } | |
578 | ||
7a7ff0c6 | 579 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
580 | { |
581 | struct lxc_list *mountlist, *listentry, *iterator; | |
582 | char *pivotdir, *mountpoint, *mountentry; | |
583 | int found; | |
584 | void **cbparm; | |
585 | ||
586 | mountentry = buffer; | |
587 | cbparm = (void **)data; | |
588 | ||
589 | mountlist = cbparm[0]; | |
590 | pivotdir = cbparm[1]; | |
591 | ||
592 | /* parse entry, first field is mountname, ignore */ | |
593 | mountpoint = strtok(mountentry, " "); | |
594 | if (!mountpoint) | |
595 | return -1; | |
596 | ||
597 | /* second field is mountpoint */ | |
598 | mountpoint = strtok(NULL, " "); | |
599 | if (!mountpoint) | |
600 | return -1; | |
601 | ||
602 | /* only consider mountpoints below old root fs */ | |
603 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
604 | return 0; | |
605 | ||
606 | /* filter duplicate mountpoints */ | |
607 | found = 0; | |
608 | lxc_list_for_each(iterator, mountlist) { | |
609 | if (!strcmp(iterator->elem, mountpoint)) { | |
610 | found = 1; | |
611 | break; | |
612 | } | |
613 | } | |
614 | if (found) | |
615 | return 0; | |
616 | ||
617 | /* add entry to list */ | |
618 | listentry = malloc(sizeof(*listentry)); | |
619 | if (!listentry) { | |
620 | SYSERROR("malloc for mountpoint listentry failed"); | |
621 | return -1; | |
622 | } | |
623 | ||
624 | listentry->elem = strdup(mountpoint); | |
625 | if (!listentry->elem) { | |
626 | SYSERROR("strdup failed"); | |
627 | return -1; | |
628 | } | |
629 | lxc_list_add_tail(mountlist, listentry); | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
cc6f6dd7 | 634 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 635 | { |
2382ecff | 636 | char path[MAXPATHLEN]; |
bf601689 MH |
637 | void *cbparm[2]; |
638 | struct lxc_list mountlist, *iterator; | |
639 | int ok, still_mounted, last_still_mounted; | |
bf601689 MH |
640 | |
641 | /* read and parse /proc/mounts in old root fs */ | |
642 | lxc_list_init(&mountlist); | |
643 | ||
cc6f6dd7 DL |
644 | /* oldrootfs is on the top tree directory now */ |
645 | snprintf(path, sizeof(path), "/%s", oldrootfs); | |
bf601689 | 646 | cbparm[0] = &mountlist; |
bf601689 | 647 | |
cc6f6dd7 | 648 | cbparm[1] = strdup(path); |
bf601689 MH |
649 | if (!cbparm[1]) { |
650 | SYSERROR("strdup failed"); | |
651 | return -1; | |
652 | } | |
653 | ||
cc6f6dd7 DL |
654 | snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
655 | ||
656 | ok = lxc_file_for_each_line(path, | |
657 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
658 | if (ok < 0) { |
659 | SYSERROR("failed to read or parse mount list '%s'", path); | |
660 | return -1; | |
661 | } | |
662 | ||
663 | /* umount filesystems until none left or list no longer shrinks */ | |
664 | still_mounted = 0; | |
665 | do { | |
666 | last_still_mounted = still_mounted; | |
667 | still_mounted = 0; | |
668 | ||
669 | lxc_list_for_each(iterator, &mountlist) { | |
670 | ||
c08556c6 | 671 | /* umount normally */ |
bf601689 MH |
672 | if (!umount(iterator->elem)) { |
673 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
674 | lxc_list_del(iterator); | |
675 | continue; | |
676 | } | |
677 | ||
bf601689 MH |
678 | still_mounted++; |
679 | } | |
7df119ee | 680 | |
bf601689 MH |
681 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
682 | ||
7df119ee | 683 | |
c08556c6 DL |
684 | lxc_list_for_each(iterator, &mountlist) { |
685 | ||
686 | /* let's try a lazy umount */ | |
687 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
688 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
689 | continue; | |
690 | } | |
691 | ||
692 | /* be more brutal (nfs) */ | |
693 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
694 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
695 | continue; | |
696 | } | |
697 | ||
7df119ee | 698 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 699 | } |
bf601689 | 700 | |
cc6f6dd7 DL |
701 | return 0; |
702 | } | |
703 | ||
704 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
705 | { | |
706 | char path[MAXPATHLEN]; | |
707 | int remove_pivotdir = 0; | |
708 | ||
709 | /* change into new root fs */ | |
710 | if (chdir(rootfs)) { | |
711 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
712 | return -1; | |
713 | } | |
714 | ||
715 | if (!pivotdir) | |
3103609d | 716 | pivotdir = "mnt"; |
cc6f6dd7 | 717 | |
4f9293b1 | 718 | /* compute the full path to pivotdir under rootfs */ |
cc6f6dd7 DL |
719 | snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
720 | ||
721 | if (access(path, F_OK)) { | |
722 | ||
723 | if (mkdir_p(path, 0755)) { | |
724 | SYSERROR("failed to create pivotdir '%s'", path); | |
725 | return -1; | |
726 | } | |
727 | ||
728 | remove_pivotdir = 1; | |
729 | DEBUG("created '%s' directory", path); | |
730 | } | |
731 | ||
732 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
733 | ||
734 | /* pivot_root into our new root fs */ | |
735 | if (pivot_root(".", path)) { | |
736 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
737 | return -1; |
738 | } | |
cc6f6dd7 DL |
739 | |
740 | if (chdir("/")) { | |
741 | SYSERROR("can't chdir to / after pivot_root"); | |
742 | return -1; | |
743 | } | |
744 | ||
745 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
746 | ||
747 | /* we switch from absolute path to relative path */ | |
748 | if (umount_oldrootfs(pivotdir)) | |
749 | return -1; | |
bf601689 | 750 | |
c08556c6 DL |
751 | /* remove temporary mount point, we don't consider the removing |
752 | * as fatal */ | |
a91d897a FW |
753 | if (remove_pivotdir && rmdir(pivotdir)) |
754 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 755 | |
bf601689 MH |
756 | return 0; |
757 | } | |
758 | ||
33fcb7a0 | 759 | static int setup_rootfs(const struct lxc_rootfs *rootfs) |
0ad19a3f | 760 | { |
33fcb7a0 | 761 | if (!rootfs->path) |
c69bd12f | 762 | return 0; |
0ad19a3f | 763 | |
12297168 | 764 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 765 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 766 | rootfs->mount); |
b1789442 DL |
767 | return -1; |
768 | } | |
769 | ||
2656d231 | 770 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 771 | ERROR("failed to mount rootfs"); |
c3f0a28c | 772 | return -1; |
773 | } | |
0ad19a3f | 774 | |
12297168 | 775 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 776 | |
ac778708 DL |
777 | return 0; |
778 | } | |
779 | ||
780 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
781 | { | |
ac778708 DL |
782 | if (!rootfs->path) |
783 | return 0; | |
784 | ||
12297168 | 785 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 786 | ERROR("failed to setup pivot root"); |
25368b52 | 787 | return -1; |
c69bd12f DL |
788 | } |
789 | ||
25368b52 | 790 | return 0; |
0ad19a3f | 791 | } |
792 | ||
d852c78c | 793 | static int setup_pts(int pts) |
3c26f34e | 794 | { |
77890c6d SW |
795 | char target[PATH_MAX]; |
796 | ||
d852c78c DL |
797 | if (!pts) |
798 | return 0; | |
3c26f34e | 799 | |
800 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 801 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 802 | return -1; |
803 | } | |
804 | ||
a6afdde9 DL |
805 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
806 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 807 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 808 | return -1; |
809 | } | |
810 | ||
3c26f34e | 811 | if (access("/dev/ptmx", F_OK)) { |
812 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
813 | goto out; | |
36eb9bde | 814 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 815 | return -1; |
816 | } | |
817 | ||
77890c6d SW |
818 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
819 | goto out; | |
820 | ||
3c26f34e | 821 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
822 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 823 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 824 | return -1; |
825 | } | |
cd54d859 DL |
826 | |
827 | INFO("created new pts instance"); | |
d852c78c | 828 | |
3c26f34e | 829 | out: |
830 | return 0; | |
831 | } | |
832 | ||
cccc74b5 DL |
833 | static int setup_personality(int persona) |
834 | { | |
835 | if (persona == -1) | |
836 | return 0; | |
837 | ||
838 | if (personality(persona) < 0) { | |
839 | SYSERROR("failed to set personality to '0x%x'", persona); | |
840 | return -1; | |
841 | } | |
842 | ||
843 | INFO("set personality to '0x%x'", persona); | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
7c6ef2a2 | 848 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 849 | const struct lxc_console *console) |
6e590161 | 850 | { |
63376d7d DL |
851 | char path[MAXPATHLEN]; |
852 | struct stat s; | |
7c6ef2a2 | 853 | int ret; |
52e35957 | 854 | |
7c6ef2a2 SH |
855 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
856 | if (ret >= sizeof(path)) { | |
857 | ERROR("console path too long\n"); | |
858 | return -1; | |
859 | } | |
52e35957 | 860 | |
63376d7d | 861 | if (access(path, F_OK)) { |
466978b0 | 862 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 863 | return 0; |
52e35957 DL |
864 | } |
865 | ||
f78a1f32 | 866 | if (console->peer == -1) { |
63376d7d | 867 | INFO("no console output required"); |
f78a1f32 DL |
868 | return 0; |
869 | } | |
ed502555 | 870 | |
63376d7d DL |
871 | if (stat(path, &s)) { |
872 | SYSERROR("failed to stat '%s'", path); | |
873 | return -1; | |
874 | } | |
875 | ||
876 | if (chmod(console->name, s.st_mode)) { | |
877 | SYSERROR("failed to set mode '0%o' to '%s'", | |
878 | s.st_mode, console->name); | |
879 | return -1; | |
880 | } | |
13954cce | 881 | |
63376d7d DL |
882 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
883 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 884 | return -1; |
885 | } | |
886 | ||
63376d7d | 887 | INFO("console has been setup"); |
7c6ef2a2 SH |
888 | return 0; |
889 | } | |
890 | ||
891 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
892 | const struct lxc_console *console, | |
893 | char *ttydir) | |
894 | { | |
895 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
896 | int ret; | |
897 | ||
898 | /* create rootfs/dev/<ttydir> directory */ | |
899 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
900 | ttydir); | |
901 | if (ret >= sizeof(path)) | |
902 | return -1; | |
903 | ret = mkdir(path, 0755); | |
904 | if (ret && errno != EEXIST) { | |
905 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
906 | return -1; | |
907 | } | |
908 | INFO("created %s\n", path); | |
909 | ||
910 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
911 | rootfs->mount, ttydir); | |
912 | if (ret >= sizeof(lxcpath)) { | |
913 | ERROR("console path too long\n"); | |
914 | return -1; | |
915 | } | |
916 | ||
917 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
918 | ret = unlink(path); | |
919 | if (ret && errno != ENOENT) { | |
920 | SYSERROR("error unlinking %s\n", path); | |
921 | return -1; | |
922 | } | |
923 | ||
924 | ret = creat(lxcpath, 0660); | |
925 | if (ret==-1 && errno != EEXIST) { | |
926 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
927 | return -1; | |
928 | } | |
929 | close(ret); | |
930 | ||
931 | if (console->peer == -1) { | |
932 | INFO("no console output required"); | |
933 | return 0; | |
934 | } | |
935 | ||
936 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
937 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
938 | return -1; | |
939 | } | |
940 | ||
941 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
942 | snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); | |
943 | ret = symlink(lxcpath, path); | |
944 | if (ret) { | |
945 | SYSERROR("failed to create symlink for console"); | |
946 | return -1; | |
947 | } | |
948 | ||
949 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 950 | |
6e590161 | 951 | return 0; |
952 | } | |
953 | ||
7c6ef2a2 SH |
954 | static int setup_console(const struct lxc_rootfs *rootfs, |
955 | const struct lxc_console *console, | |
956 | char *ttydir) | |
957 | { | |
958 | /* We don't have a rootfs, /dev/console will be shared */ | |
959 | if (!rootfs->path) | |
960 | return 0; | |
961 | if (!ttydir) | |
962 | return setup_dev_console(rootfs, console); | |
963 | ||
964 | return setup_ttydir_console(rootfs, console, ttydir); | |
965 | } | |
966 | ||
102a5303 | 967 | static int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 968 | { |
102a5303 DL |
969 | struct lxc_list *iterator; |
970 | struct lxc_cgroup *cg; | |
88329c69 | 971 | int ret = -1; |
6f4a3756 | 972 | |
102a5303 DL |
973 | if (lxc_list_empty(cgroups)) |
974 | return 0; | |
6f4a3756 | 975 | |
102a5303 | 976 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 977 | |
102a5303 | 978 | cg = iterator->elem; |
6f4a3756 | 979 | |
102a5303 | 980 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 981 | goto out; |
6f4a3756 | 982 | |
102a5303 | 983 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 984 | } |
13954cce | 985 | |
88329c69 | 986 | ret = 0; |
cd54d859 | 987 | INFO("cgroup has been setup"); |
88329c69 MN |
988 | out: |
989 | return ret; | |
576f946d | 990 | } |
991 | ||
998ac676 RT |
992 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
993 | { | |
994 | struct mount_opt *mo; | |
995 | ||
996 | /* If opt is found in mount_opt, set or clear flags. | |
997 | * Otherwise append it to data. */ | |
998 | ||
999 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1000 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1001 | if (mo->clear) | |
1002 | *flags &= ~mo->flag; | |
1003 | else | |
1004 | *flags |= mo->flag; | |
1005 | return; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | if (strlen(*data)) | |
1010 | strcat(*data, ","); | |
1011 | strcat(*data, opt); | |
1012 | } | |
1013 | ||
911324ef | 1014 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1015 | char **mntdata) |
1016 | { | |
1017 | char *s, *data; | |
1018 | char *p, *saveptr = NULL; | |
1019 | ||
911324ef | 1020 | *mntdata = NULL; |
91656ce5 | 1021 | *mntflags = 0L; |
911324ef DL |
1022 | |
1023 | if (!mntopts) | |
998ac676 RT |
1024 | return 0; |
1025 | ||
911324ef | 1026 | s = strdup(mntopts); |
998ac676 | 1027 | if (!s) { |
36eb9bde | 1028 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1029 | return -1; |
1030 | } | |
1031 | ||
1032 | data = malloc(strlen(s) + 1); | |
1033 | if (!data) { | |
36eb9bde | 1034 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1035 | free(s); |
1036 | return -1; | |
1037 | } | |
1038 | *data = 0; | |
1039 | ||
1040 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1041 | p = strtok_r(NULL, ",", &saveptr)) | |
1042 | parse_mntopt(p, mntflags, &data); | |
1043 | ||
1044 | if (*data) | |
1045 | *mntdata = data; | |
1046 | else | |
1047 | free(data); | |
1048 | free(s); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
911324ef DL |
1053 | static int mount_entry(const char *fsname, const char *target, |
1054 | const char *fstype, unsigned long mountflags, | |
1055 | const char *data) | |
1056 | { | |
1057 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1058 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1059 | return -1; | |
1060 | } | |
1061 | ||
1062 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1063 | ||
1064 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1065 | fsname, target); | |
1066 | ||
1067 | if (mount(fsname, target, fstype, | |
1068 | mountflags | MS_REMOUNT, data)) { | |
1069 | SYSERROR("failed to mount '%s' on '%s'", | |
1070 | fsname, target); | |
1071 | return -1; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1076 | ||
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1081 | { |
998ac676 RT |
1082 | unsigned long mntflags; |
1083 | char *mntdata; | |
911324ef DL |
1084 | int ret; |
1085 | ||
1086 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1087 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1088 | return -1; | |
1089 | } | |
1090 | ||
1091 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1092 | mntent->mnt_type, mntflags, mntdata); | |
1093 | ||
1094 | free(mntdata); | |
1095 | ||
1096 | return ret; | |
1097 | } | |
1098 | ||
1099 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
013bd428 | 1100 | const struct lxc_rootfs *rootfs) |
911324ef | 1101 | { |
013bd428 | 1102 | char *aux; |
59760f5d | 1103 | char path[MAXPATHLEN]; |
911324ef DL |
1104 | unsigned long mntflags; |
1105 | char *mntdata; | |
013bd428 | 1106 | int ret = 0; |
0ad19a3f | 1107 | |
911324ef DL |
1108 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1109 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1110 | return -1; | |
1111 | } | |
1bc60a65 | 1112 | |
013bd428 DL |
1113 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1114 | if (!aux) { | |
1115 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1116 | goto out; | |
1117 | } | |
1118 | ||
071a2b8c | 1119 | snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
013bd428 | 1120 | aux + strlen(rootfs->path)); |
d330fe7b | 1121 | |
013bd428 | 1122 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1123 | mntflags, mntdata); |
0ad19a3f | 1124 | |
013bd428 | 1125 | out: |
911324ef DL |
1126 | free(mntdata); |
1127 | return ret; | |
1128 | } | |
d330fe7b | 1129 | |
911324ef DL |
1130 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1131 | const char *rootfs) | |
1132 | { | |
1133 | char path[MAXPATHLEN]; | |
1134 | unsigned long mntflags; | |
1135 | char *mntdata; | |
1136 | int ret; | |
d330fe7b | 1137 | |
911324ef DL |
1138 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1139 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1140 | return -1; | |
1141 | } | |
d330fe7b | 1142 | |
911324ef DL |
1143 | /* relative to root mount point */ |
1144 | snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); | |
1145 | ||
1146 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1147 | mntflags, mntdata); | |
1148 | ||
1149 | free(mntdata); | |
998ac676 | 1150 | |
911324ef DL |
1151 | return ret; |
1152 | } | |
1153 | ||
1154 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file) | |
1155 | { | |
1156 | struct mntent *mntent; | |
1157 | int ret = -1; | |
e76b8764 | 1158 | |
911324ef | 1159 | while ((mntent = getmntent(file))) { |
e76b8764 | 1160 | |
911324ef DL |
1161 | if (!rootfs->path) { |
1162 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1163 | goto out; |
911324ef | 1164 | continue; |
e76b8764 CDC |
1165 | } |
1166 | ||
911324ef DL |
1167 | /* We have a separate root, mounts are relative to it */ |
1168 | if (mntent->mnt_dir[0] != '/') { | |
1169 | if (mount_entry_on_relative_rootfs(mntent, | |
1170 | rootfs->mount)) | |
1171 | goto out; | |
1172 | continue; | |
1173 | } | |
cd54d859 | 1174 | |
013bd428 | 1175 | if (mount_entry_on_absolute_rootfs(mntent, rootfs)) |
911324ef | 1176 | goto out; |
0ad19a3f | 1177 | } |
cd54d859 | 1178 | |
0ad19a3f | 1179 | ret = 0; |
cd54d859 DL |
1180 | |
1181 | INFO("mount points have been setup"); | |
0ad19a3f | 1182 | out: |
e7938e9e MN |
1183 | return ret; |
1184 | } | |
1185 | ||
59760f5d | 1186 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab) |
e7938e9e MN |
1187 | { |
1188 | FILE *file; | |
1189 | int ret; | |
1190 | ||
1191 | if (!fstab) | |
1192 | return 0; | |
1193 | ||
1194 | file = setmntent(fstab, "r"); | |
1195 | if (!file) { | |
1196 | SYSERROR("failed to use '%s'", fstab); | |
1197 | return -1; | |
1198 | } | |
1199 | ||
59760f5d | 1200 | ret = mount_file_entries(rootfs, file); |
e7938e9e | 1201 | |
0ad19a3f | 1202 | endmntent(file); |
1203 | return ret; | |
1204 | } | |
1205 | ||
59760f5d | 1206 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount) |
e7938e9e MN |
1207 | { |
1208 | FILE *file; | |
1209 | struct lxc_list *iterator; | |
1210 | char *mount_entry; | |
1211 | int ret; | |
1212 | ||
1213 | file = tmpfile(); | |
1214 | if (!file) { | |
1215 | ERROR("tmpfile error: %m"); | |
1216 | return -1; | |
1217 | } | |
1218 | ||
1219 | lxc_list_for_each(iterator, mount) { | |
1220 | mount_entry = iterator->elem; | |
1d6b1976 | 1221 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1222 | } |
1223 | ||
1224 | rewind(file); | |
1225 | ||
59760f5d | 1226 | ret = mount_file_entries(rootfs, file); |
e7938e9e MN |
1227 | |
1228 | fclose(file); | |
1229 | return ret; | |
1230 | } | |
1231 | ||
81810dd1 DL |
1232 | static int setup_caps(struct lxc_list *caps) |
1233 | { | |
1234 | struct lxc_list *iterator; | |
1235 | char *drop_entry; | |
d55bc1ad | 1236 | char *ptr; |
81810dd1 DL |
1237 | int i, capid; |
1238 | ||
1239 | lxc_list_for_each(iterator, caps) { | |
1240 | ||
1241 | drop_entry = iterator->elem; | |
1242 | ||
1243 | capid = -1; | |
1244 | ||
1245 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1246 | ||
1247 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1248 | continue; | |
1249 | ||
1250 | capid = caps_opt[i].value; | |
1251 | break; | |
1252 | } | |
1253 | ||
d55bc1ad CS |
1254 | if (capid < 0) { |
1255 | /* try to see if it's numeric, so the user may specify | |
1256 | * capabilities that the running kernel knows about but | |
1257 | * we don't */ | |
1258 | capid = strtol(drop_entry, &ptr, 10); | |
1259 | if (!ptr || *ptr != '\0' || | |
1260 | capid == LONG_MIN || capid == LONG_MAX) | |
1261 | /* not a valid number */ | |
1262 | capid = -1; | |
1263 | else if (capid > lxc_caps_last_cap()) | |
1264 | /* we have a number but it's not a valid | |
1265 | * capability */ | |
1266 | capid = -1; | |
1267 | } | |
1268 | ||
81810dd1 | 1269 | if (capid < 0) { |
1e11be34 DL |
1270 | ERROR("unknown capability %s", drop_entry); |
1271 | return -1; | |
81810dd1 DL |
1272 | } |
1273 | ||
1274 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1275 | ||
1276 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1277 | SYSERROR("failed to remove %s capability", drop_entry); | |
1278 | return -1; | |
1279 | } | |
1280 | ||
1281 | } | |
1282 | ||
1283 | DEBUG("capabilities has been setup"); | |
1284 | ||
1285 | return 0; | |
1286 | } | |
1287 | ||
0ad19a3f | 1288 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1289 | { | |
1290 | struct sockaddr sockaddr; | |
1291 | struct ifreq ifr; | |
1292 | int ret, fd; | |
1293 | ||
3cfc0f3a MN |
1294 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1295 | if (ret) { | |
1296 | ERROR("mac address '%s' conversion failed : %s", | |
1297 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1298 | return -1; |
1299 | } | |
1300 | ||
1301 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1302 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1303 | ||
1304 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1305 | if (fd < 0) { | |
3ab87b66 | 1306 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1307 | return -1; |
1308 | } | |
1309 | ||
1310 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1311 | close(fd); | |
1312 | if (ret) | |
3ab87b66 | 1313 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1314 | |
cd54d859 DL |
1315 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1316 | ||
0ad19a3f | 1317 | return ret; |
1318 | } | |
1319 | ||
82d5ae15 | 1320 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1321 | { |
82d5ae15 DL |
1322 | struct lxc_list *iterator; |
1323 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1324 | int err; |
0ad19a3f | 1325 | |
82d5ae15 DL |
1326 | lxc_list_for_each(iterator, ip) { |
1327 | ||
1328 | inetdev = iterator->elem; | |
1329 | ||
0093bb8c DL |
1330 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1331 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1332 | if (err) { |
1333 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1334 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1335 | return -1; |
1336 | } | |
1337 | } | |
1338 | ||
1339 | return 0; | |
0ad19a3f | 1340 | } |
1341 | ||
82d5ae15 | 1342 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1343 | { |
82d5ae15 | 1344 | struct lxc_list *iterator; |
7fa9074f | 1345 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1346 | int err; |
0ad19a3f | 1347 | |
82d5ae15 DL |
1348 | lxc_list_for_each(iterator, ip) { |
1349 | ||
1350 | inet6dev = iterator->elem; | |
1351 | ||
b3df193c | 1352 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1353 | &inet6dev->mcast, &inet6dev->acast, |
1354 | inet6dev->prefix); | |
3cfc0f3a MN |
1355 | if (err) { |
1356 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1357 | ifindex, strerror(-err)); | |
82d5ae15 | 1358 | return -1; |
3cfc0f3a | 1359 | } |
82d5ae15 DL |
1360 | } |
1361 | ||
1362 | return 0; | |
0ad19a3f | 1363 | } |
1364 | ||
82d5ae15 | 1365 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1366 | { |
0ad19a3f | 1367 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1368 | char *current_ifname = ifname; |
3cfc0f3a | 1369 | int err; |
0ad19a3f | 1370 | |
82d5ae15 DL |
1371 | /* empty network namespace */ |
1372 | if (!netdev->ifindex) { | |
b0efbac4 | 1373 | if (netdev->flags & IFF_UP) { |
d472214b | 1374 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1375 | if (err) { |
1376 | ERROR("failed to set the loopback up : %s", | |
1377 | strerror(-err)); | |
82d5ae15 DL |
1378 | return -1; |
1379 | } | |
82d5ae15 | 1380 | } |
7b57e8b6 | 1381 | return 0; |
0ad19a3f | 1382 | } |
13954cce | 1383 | |
82d5ae15 DL |
1384 | /* retrieve the name of the interface */ |
1385 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1386 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1387 | netdev->ifindex); |
0ad19a3f | 1388 | return -1; |
1389 | } | |
13954cce | 1390 | |
018ef520 | 1391 | /* default: let the system to choose one interface name */ |
9d083402 | 1392 | if (!netdev->name) |
fb6d9b2f DL |
1393 | netdev->name = netdev->type == LXC_NET_PHYS ? |
1394 | netdev->link : "eth%d"; | |
018ef520 | 1395 | |
82d5ae15 | 1396 | /* rename the interface name */ |
b84f58b9 | 1397 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
1398 | if (err) { |
1399 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1400 | strerror(-err)); | |
018ef520 DL |
1401 | return -1; |
1402 | } | |
1403 | ||
1404 | /* Re-read the name of the interface because its name has changed | |
1405 | * and would be automatically allocated by the system | |
1406 | */ | |
82d5ae15 | 1407 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1408 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1409 | netdev->ifindex); |
018ef520 | 1410 | return -1; |
0ad19a3f | 1411 | } |
1412 | ||
82d5ae15 DL |
1413 | /* set a mac address */ |
1414 | if (netdev->hwaddr) { | |
1415 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1416 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1417 | current_ifname); |
0ad19a3f | 1418 | return -1; |
1419 | } | |
1420 | } | |
1421 | ||
82d5ae15 DL |
1422 | /* setup ipv4 addresses on the interface */ |
1423 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1424 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1425 | ifname); |
1426 | return -1; | |
1427 | } | |
1428 | ||
82d5ae15 DL |
1429 | /* setup ipv6 addresses on the interface */ |
1430 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1431 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1432 | ifname); |
1433 | return -1; | |
1434 | } | |
1435 | ||
82d5ae15 | 1436 | /* set the network device up */ |
b0efbac4 | 1437 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1438 | int err; |
1439 | ||
d472214b | 1440 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
1441 | if (err) { |
1442 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1443 | strerror(-err)); | |
0ad19a3f | 1444 | return -1; |
1445 | } | |
1446 | ||
1447 | /* the network is up, make the loopback up too */ | |
d472214b | 1448 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1449 | if (err) { |
1450 | ERROR("failed to set the loopback up : %s", | |
1451 | strerror(-err)); | |
0ad19a3f | 1452 | return -1; |
1453 | } | |
1454 | } | |
1455 | ||
f8fee0e2 MK |
1456 | /* We can only set up the default routes after bringing |
1457 | * up the interface, sine bringing up the interface adds | |
1458 | * the link-local routes and we can't add a default | |
1459 | * route if the gateway is not reachable. */ | |
1460 | ||
1461 | /* setup ipv4 gateway on the interface */ | |
1462 | if (netdev->ipv4_gateway) { | |
1463 | if (!(netdev->flags & IFF_UP)) { | |
1464 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
1465 | return -1; | |
1466 | } | |
1467 | ||
1468 | if (lxc_list_empty(&netdev->ipv4)) { | |
1469 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
1470 | return -1; | |
1471 | } | |
1472 | ||
1473 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
1474 | if (err) { | |
1475 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
1476 | ifname, strerror(-err)); | |
19a26f82 MK |
1477 | if (netdev->ipv4_gateway_auto) { |
1478 | char buf[INET_ADDRSTRLEN]; | |
1479 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
1480 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
1481 | } | |
f8fee0e2 MK |
1482 | return -1; |
1483 | } | |
1484 | } | |
1485 | ||
1486 | /* setup ipv6 gateway on the interface */ | |
1487 | if (netdev->ipv6_gateway) { | |
1488 | if (!(netdev->flags & IFF_UP)) { | |
1489 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
1490 | return -1; | |
1491 | } | |
1492 | ||
1493 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
1494 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
1495 | return -1; | |
1496 | } | |
1497 | ||
1498 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
1499 | if (err) { | |
1500 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
1501 | ifname, strerror(-err)); | |
19a26f82 MK |
1502 | if (netdev->ipv6_gateway_auto) { |
1503 | char buf[INET6_ADDRSTRLEN]; | |
1504 | inet_ntop(AF_INET, netdev->ipv6_gateway, buf, sizeof(buf)); | |
1505 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); | |
1506 | } | |
f8fee0e2 MK |
1507 | return -1; |
1508 | } | |
1509 | } | |
1510 | ||
cd54d859 DL |
1511 | DEBUG("'%s' has been setup", current_ifname); |
1512 | ||
0ad19a3f | 1513 | return 0; |
1514 | } | |
1515 | ||
5f4535a3 | 1516 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1517 | { |
82d5ae15 | 1518 | struct lxc_list *iterator; |
82d5ae15 | 1519 | struct lxc_netdev *netdev; |
0ad19a3f | 1520 | |
5f4535a3 | 1521 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1522 | |
5f4535a3 | 1523 | netdev = iterator->elem; |
82d5ae15 DL |
1524 | |
1525 | if (setup_netdev(netdev)) { | |
1526 | ERROR("failed to setup netdev"); | |
1527 | return -1; | |
1528 | } | |
1529 | } | |
cd54d859 | 1530 | |
5f4535a3 DL |
1531 | if (!lxc_list_empty(network)) |
1532 | INFO("network has been setup"); | |
cd54d859 DL |
1533 | |
1534 | return 0; | |
0ad19a3f | 1535 | } |
1536 | ||
49684c0b CS |
1537 | static int setup_private_host_hw_addr(char *veth1) |
1538 | { | |
1539 | struct ifreq ifr; | |
1540 | int err; | |
1541 | int sockfd; | |
1542 | ||
1543 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
1544 | if (sockfd < 0) | |
1545 | return -errno; | |
1546 | ||
1547 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
1548 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
1549 | if (err < 0) { | |
1550 | close(sockfd); | |
1551 | return -errno; | |
1552 | } | |
1553 | ||
1554 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
1555 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
1556 | close(sockfd); | |
1557 | if (err < 0) | |
1558 | return -errno; | |
1559 | ||
7ad84da7 DL |
1560 | DEBUG("mac address of host interface '%s' changed to private " |
1561 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
1562 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
1563 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
1564 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
1565 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
1566 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
1567 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
1568 | |
1569 | return 0; | |
1570 | } | |
1571 | ||
7b379ab3 | 1572 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 1573 | { |
7b379ab3 MN |
1574 | struct lxc_conf *new; |
1575 | ||
1576 | new = malloc(sizeof(*new)); | |
1577 | if (!new) { | |
1578 | ERROR("lxc_conf_init : %m"); | |
1579 | return NULL; | |
1580 | } | |
1581 | memset(new, 0, sizeof(*new)); | |
1582 | ||
cccc74b5 | 1583 | new->personality = -1; |
28a4b0e5 | 1584 | new->console.path = NULL; |
63376d7d DL |
1585 | new->console.peer = -1; |
1586 | new->console.master = -1; | |
1587 | new->console.slave = -1; | |
1588 | new->console.name[0] = '\0'; | |
12297168 | 1589 | new->rootfs.mount = LXCROOTFSMOUNT; |
7b379ab3 MN |
1590 | lxc_list_init(&new->cgroup); |
1591 | lxc_list_init(&new->network); | |
1592 | lxc_list_init(&new->mount_list); | |
81810dd1 | 1593 | lxc_list_init(&new->caps); |
7b379ab3 MN |
1594 | |
1595 | return new; | |
089cd8b8 DL |
1596 | } |
1597 | ||
e3b4c4c4 | 1598 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1599 | { |
8634bc19 | 1600 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 1601 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 1602 | int err; |
13954cce | 1603 | |
e892973e DL |
1604 | if (netdev->priv.veth_attr.pair) |
1605 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 MT |
1606 | else { |
1607 | snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
0e391e57 | 1608 | veth1 = mktemp(veth1buf); |
8634bc19 | 1609 | } |
82d5ae15 | 1610 | |
0e391e57 DL |
1611 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
1612 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
1613 | |
1614 | if (!strlen(veth1) || !strlen(veth2)) { | |
1615 | ERROR("failed to allocate a temporary name"); | |
1616 | return -1; | |
0ad19a3f | 1617 | } |
1618 | ||
3cfc0f3a MN |
1619 | err = lxc_veth_create(veth1, veth2); |
1620 | if (err) { | |
1621 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
1622 | strerror(-err)); | |
6ab9ab6d | 1623 | return -1; |
0ad19a3f | 1624 | } |
13954cce | 1625 | |
49684c0b CS |
1626 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
1627 | * will always keep the host's mac address and not take the mac address | |
1628 | * of a container */ | |
1629 | err = setup_private_host_hw_addr(veth1); | |
1630 | if (err) { | |
1631 | ERROR("failed to change mac address of host interface '%s' : %s", | |
1632 | veth1, strerror(-err)); | |
1633 | goto out_delete; | |
1634 | } | |
1635 | ||
82d5ae15 | 1636 | if (netdev->mtu) { |
d472214b | 1637 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 1638 | if (!err) |
d472214b | 1639 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
1640 | if (err) { |
1641 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
1642 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 1643 | goto out_delete; |
75d09f83 DL |
1644 | } |
1645 | } | |
1646 | ||
3cfc0f3a MN |
1647 | if (netdev->link) { |
1648 | err = lxc_bridge_attach(netdev->link, veth1); | |
1649 | if (err) { | |
1650 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
1651 | veth1, netdev->link, strerror(-err)); | |
1652 | goto out_delete; | |
1653 | } | |
eb14c10a DL |
1654 | } |
1655 | ||
82d5ae15 DL |
1656 | netdev->ifindex = if_nametoindex(veth2); |
1657 | if (!netdev->ifindex) { | |
36eb9bde | 1658 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
1659 | goto out_delete; |
1660 | } | |
1661 | ||
d472214b | 1662 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
1663 | if (err) { |
1664 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
1665 | goto out_delete; | |
0ad19a3f | 1666 | } |
1667 | ||
e3b4c4c4 | 1668 | if (netdev->upscript) { |
751d9dcd DL |
1669 | err = run_script(handler->name, "net", netdev->upscript, "up", |
1670 | "veth", veth1, (char*) NULL); | |
1671 | if (err) | |
e3b4c4c4 | 1672 | goto out_delete; |
e3b4c4c4 ST |
1673 | } |
1674 | ||
82d5ae15 DL |
1675 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
1676 | veth1, veth2, netdev->ifindex); | |
1677 | ||
6ab9ab6d | 1678 | return 0; |
eb14c10a DL |
1679 | |
1680 | out_delete: | |
b84f58b9 | 1681 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 1682 | return -1; |
13954cce | 1683 | } |
d957ae2d | 1684 | |
e3b4c4c4 | 1685 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1686 | { |
0e391e57 | 1687 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 1688 | int err; |
d957ae2d MT |
1689 | |
1690 | if (!netdev->link) { | |
1691 | ERROR("no link specified for macvlan netdev"); | |
1692 | return -1; | |
1693 | } | |
13954cce | 1694 | |
0e391e57 | 1695 | snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
82d5ae15 | 1696 | |
0e391e57 | 1697 | peer = mktemp(peerbuf); |
82d5ae15 DL |
1698 | if (!strlen(peer)) { |
1699 | ERROR("failed to make a temporary name"); | |
1700 | return -1; | |
0ad19a3f | 1701 | } |
1702 | ||
3cfc0f3a MN |
1703 | err = lxc_macvlan_create(netdev->link, peer, |
1704 | netdev->priv.macvlan_attr.mode); | |
1705 | if (err) { | |
1706 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
1707 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 1708 | return -1; |
0ad19a3f | 1709 | } |
1710 | ||
82d5ae15 DL |
1711 | netdev->ifindex = if_nametoindex(peer); |
1712 | if (!netdev->ifindex) { | |
36eb9bde | 1713 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 1714 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 1715 | return -1; |
22ebac19 | 1716 | } |
1717 | ||
e3b4c4c4 | 1718 | if (netdev->upscript) { |
751d9dcd DL |
1719 | err = run_script(handler->name, "net", netdev->upscript, "up", |
1720 | "macvlan", netdev->link, (char*) NULL); | |
1721 | if (err) | |
e3b4c4c4 | 1722 | return -1; |
e3b4c4c4 ST |
1723 | } |
1724 | ||
e892973e DL |
1725 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
1726 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 1727 | |
d957ae2d | 1728 | return 0; |
0ad19a3f | 1729 | } |
1730 | ||
26c39028 | 1731 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 1732 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
1733 | { |
1734 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 1735 | int err; |
26c39028 JHS |
1736 | |
1737 | if (!netdev->link) { | |
1738 | ERROR("no link specified for vlan netdev"); | |
1739 | return -1; | |
1740 | } | |
1741 | ||
e892973e | 1742 | snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
26c39028 | 1743 | |
3cfc0f3a MN |
1744 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
1745 | if (err) { | |
1746 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
1747 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
1748 | return -1; |
1749 | } | |
1750 | ||
1751 | netdev->ifindex = if_nametoindex(peer); | |
1752 | if (!netdev->ifindex) { | |
1753 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 1754 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
1755 | return -1; |
1756 | } | |
1757 | ||
e892973e DL |
1758 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
1759 | netdev->ifindex); | |
1760 | ||
26c39028 JHS |
1761 | return 0; |
1762 | } | |
1763 | ||
e3b4c4c4 | 1764 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1765 | { |
6168e99f DL |
1766 | if (!netdev->link) { |
1767 | ERROR("no link specified for the physical interface"); | |
1768 | return -1; | |
1769 | } | |
1770 | ||
9d083402 | 1771 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 1772 | if (!netdev->ifindex) { |
9d083402 | 1773 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 1774 | return -1; |
1775 | } | |
1776 | ||
e3b4c4c4 ST |
1777 | if (netdev->upscript) { |
1778 | int err; | |
751d9dcd DL |
1779 | err = run_script(handler->name, "net", netdev->upscript, |
1780 | "up", "phys", netdev->link, (char*) NULL); | |
1781 | if (err) | |
e3b4c4c4 | 1782 | return -1; |
e3b4c4c4 ST |
1783 | } |
1784 | ||
82d5ae15 | 1785 | return 0; |
0ad19a3f | 1786 | } |
1787 | ||
e3b4c4c4 | 1788 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 1789 | { |
82d5ae15 | 1790 | netdev->ifindex = 0; |
e3b4c4c4 ST |
1791 | if (netdev->upscript) { |
1792 | int err; | |
751d9dcd DL |
1793 | err = run_script(handler->name, "net", netdev->upscript, |
1794 | "up", "empty", (char*) NULL); | |
1795 | if (err) | |
e3b4c4c4 | 1796 | return -1; |
e3b4c4c4 | 1797 | } |
82d5ae15 | 1798 | return 0; |
0ad19a3f | 1799 | } |
1800 | ||
e3b4c4c4 | 1801 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 1802 | { |
e3b4c4c4 | 1803 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 1804 | struct lxc_list *iterator; |
82d5ae15 | 1805 | struct lxc_netdev *netdev; |
0ad19a3f | 1806 | |
5f4535a3 | 1807 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 1808 | |
5f4535a3 | 1809 | netdev = iterator->elem; |
13954cce | 1810 | |
24654103 | 1811 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 1812 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 1813 | netdev->type); |
82d5ae15 DL |
1814 | return -1; |
1815 | } | |
0ad19a3f | 1816 | |
e3b4c4c4 | 1817 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
1818 | ERROR("failed to create netdev"); |
1819 | return -1; | |
1820 | } | |
e3b4c4c4 | 1821 | |
0ad19a3f | 1822 | } |
1823 | ||
1824 | return 0; | |
1825 | } | |
1826 | ||
7fef7a06 DL |
1827 | void lxc_delete_network(struct lxc_list *network) |
1828 | { | |
1829 | struct lxc_list *iterator; | |
1830 | struct lxc_netdev *netdev; | |
1831 | ||
1832 | lxc_list_for_each(iterator, network) { | |
1833 | netdev = iterator->elem; | |
d472214b DL |
1834 | if (netdev->ifindex == 0) |
1835 | continue; | |
1836 | ||
d8f8e352 DL |
1837 | if (netdev->type == LXC_NET_PHYS) { |
1838 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) | |
1839 | WARN("failed to rename to the initial name the " \ | |
1840 | "netdev '%s'", netdev->link); | |
d472214b | 1841 | continue; |
d8f8e352 | 1842 | } |
d472214b | 1843 | |
d8f8e352 DL |
1844 | /* Recent kernel remove the virtual interfaces when the network |
1845 | * namespace is destroyed but in case we did not moved the | |
1846 | * interface to the network namespace, we have to destroy it | |
1847 | */ | |
1848 | if (lxc_netdev_delete_by_index(netdev->ifindex)) | |
1849 | WARN("failed to remove interface '%s'", netdev->name); | |
7fef7a06 DL |
1850 | } |
1851 | } | |
1852 | ||
5f4535a3 | 1853 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 1854 | { |
82d5ae15 | 1855 | struct lxc_list *iterator; |
82d5ae15 | 1856 | struct lxc_netdev *netdev; |
3cfc0f3a | 1857 | int err; |
0ad19a3f | 1858 | |
5f4535a3 | 1859 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 1860 | |
5f4535a3 | 1861 | netdev = iterator->elem; |
82d5ae15 | 1862 | |
236087a6 DL |
1863 | /* empty network namespace, nothing to move */ |
1864 | if (!netdev->ifindex) | |
1865 | continue; | |
1866 | ||
d472214b | 1867 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
1868 | if (err) { |
1869 | ERROR("failed to move '%s' to the container : %s", | |
1870 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
1871 | return -1; |
1872 | } | |
1873 | ||
c1c75c04 | 1874 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 1875 | } |
1876 | ||
1877 | return 0; | |
1878 | } | |
1879 | ||
19a26f82 MK |
1880 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
1881 | { | |
1882 | struct lxc_list *network = &handler->conf->network; | |
1883 | struct lxc_list *iterator; | |
1884 | struct lxc_netdev *netdev; | |
1885 | int link_index; | |
1886 | ||
1887 | lxc_list_for_each(iterator, network) { | |
1888 | netdev = iterator->elem; | |
1889 | ||
1890 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
1891 | continue; | |
1892 | ||
1893 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
1894 | ERROR("gateway = auto only supported for " | |
1895 | "veth and macvlan"); | |
1896 | return -1; | |
1897 | } | |
1898 | ||
1899 | if (!netdev->link) { | |
1900 | ERROR("gateway = auto needs a link interface"); | |
1901 | return -1; | |
1902 | } | |
1903 | ||
1904 | link_index = if_nametoindex(netdev->link); | |
1905 | if (!link_index) | |
1906 | return -EINVAL; | |
1907 | ||
1908 | if (netdev->ipv4_gateway_auto) { | |
1909 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
1910 | ERROR("failed to automatically find ipv4 gateway " | |
1911 | "address from link interface '%s'", netdev->link); | |
1912 | return -1; | |
1913 | } | |
1914 | } | |
1915 | ||
1916 | if (netdev->ipv6_gateway_auto) { | |
1917 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
1918 | ERROR("failed to automatically find ipv6 gateway " | |
1919 | "address from link interface '%s'", netdev->link); | |
1920 | return -1; | |
1921 | } | |
1922 | } | |
1923 | } | |
1924 | ||
1925 | return 0; | |
1926 | } | |
1927 | ||
5e4a62bf | 1928 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 1929 | { |
5e4a62bf | 1930 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 1931 | int i; |
b0a33c1e | 1932 | |
5e4a62bf DL |
1933 | /* no tty in the configuration */ |
1934 | if (!conf->tty) | |
b0a33c1e | 1935 | return 0; |
1936 | ||
13954cce | 1937 | tty_info->pty_info = |
e4e7d59d | 1938 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 1939 | if (!tty_info->pty_info) { |
36eb9bde | 1940 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 1941 | return -1; |
b0a33c1e | 1942 | } |
1943 | ||
985d15b1 | 1944 | for (i = 0; i < conf->tty; i++) { |
13954cce | 1945 | |
b0a33c1e | 1946 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
1947 | ||
13954cce | 1948 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 1949 | pty_info->name, NULL, NULL)) { |
36eb9bde | 1950 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
1951 | tty_info->nbtty = i; |
1952 | lxc_delete_tty(tty_info); | |
1953 | return -1; | |
b0a33c1e | 1954 | } |
1955 | ||
5332bb84 DL |
1956 | DEBUG("allocated pty '%s' (%d/%d)", |
1957 | pty_info->name, pty_info->master, pty_info->slave); | |
1958 | ||
b035ad62 MS |
1959 | /* Prevent leaking the file descriptors to the container */ |
1960 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
1961 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
1962 | ||
b0a33c1e | 1963 | pty_info->busy = 0; |
1964 | } | |
1965 | ||
985d15b1 | 1966 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
1967 | |
1968 | INFO("tty's configured"); | |
1969 | ||
985d15b1 | 1970 | return 0; |
b0a33c1e | 1971 | } |
1972 | ||
1973 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
1974 | { | |
1975 | int i; | |
1976 | ||
1977 | for (i = 0; i < tty_info->nbtty; i++) { | |
1978 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
1979 | ||
1980 | close(pty_info->master); | |
1981 | close(pty_info->slave); | |
1982 | } | |
1983 | ||
1984 | free(tty_info->pty_info); | |
1985 | tty_info->nbtty = 0; | |
1986 | } | |
1987 | ||
571e6ec8 | 1988 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 1989 | { |
571e6ec8 | 1990 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 1991 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 1992 | return -1; |
0ad19a3f | 1993 | } |
1994 | ||
5f4535a3 | 1995 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 1996 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 1997 | return -1; |
0ad19a3f | 1998 | } |
1999 | ||
ac778708 DL |
2000 | if (setup_rootfs(&lxc_conf->rootfs)) { |
2001 | ERROR("failed to setup rootfs for '%s'", name); | |
95b5ffaf | 2002 | return -1; |
0ad19a3f | 2003 | } |
2004 | ||
59760f5d | 2005 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab)) { |
36eb9bde | 2006 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2007 | return -1; |
576f946d | 2008 | } |
2009 | ||
59760f5d | 2010 | if (setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list)) { |
e7938e9e MN |
2011 | ERROR("failed to setup the mount entries for '%s'", name); |
2012 | return -1; | |
2013 | } | |
2014 | ||
ac778708 DL |
2015 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
2016 | ERROR("failed to setup the cgroups for '%s'", name); | |
2017 | return -1; | |
2018 | } | |
2019 | ||
7c6ef2a2 | 2020 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2021 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2022 | return -1; |
6e590161 | 2023 | } |
2024 | ||
7c6ef2a2 | 2025 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2026 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2027 | return -1; |
b0a33c1e | 2028 | } |
2029 | ||
ac778708 | 2030 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2031 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2032 | return -1; |
ed502555 | 2033 | } |
2034 | ||
571e6ec8 | 2035 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2036 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2037 | return -1; |
3c26f34e | 2038 | } |
2039 | ||
cccc74b5 DL |
2040 | if (setup_personality(lxc_conf->personality)) { |
2041 | ERROR("failed to setup personality"); | |
2042 | return -1; | |
2043 | } | |
2044 | ||
81810dd1 DL |
2045 | if (setup_caps(&lxc_conf->caps)) { |
2046 | ERROR("failed to drop capabilities"); | |
2047 | return -1; | |
2048 | } | |
2049 | ||
cd54d859 DL |
2050 | NOTICE("'%s' is setup.", name); |
2051 | ||
0ad19a3f | 2052 | return 0; |
2053 | } |