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