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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> | |
0ad19a3f | 31 | #include <unistd.h> |
e3b4c4c4 | 32 | #include <sys/wait.h> |
2d76d1d7 | 33 | #include <sys/syscall.h> |
e827ff7e SG |
34 | |
35 | #if HAVE_PTY_H | |
b0a33c1e | 36 | #include <pty.h> |
e827ff7e SG |
37 | #else |
38 | #include <../include/openpty.h> | |
39 | #endif | |
0ad19a3f | 40 | |
b3ecde1e DL |
41 | #include <linux/loop.h> |
42 | ||
0ad19a3f | 43 | #include <sys/types.h> |
44 | #include <sys/utsname.h> | |
45 | #include <sys/param.h> | |
46 | #include <sys/stat.h> | |
47 | #include <sys/socket.h> | |
48 | #include <sys/mount.h> | |
49 | #include <sys/mman.h> | |
81810dd1 | 50 | #include <sys/prctl.h> |
0ad19a3f | 51 | |
52 | #include <arpa/inet.h> | |
53 | #include <fcntl.h> | |
54 | #include <netinet/in.h> | |
55 | #include <net/if.h> | |
6f4a3756 | 56 | #include <libgen.h> |
0ad19a3f | 57 | |
e5bda9ee | 58 | #include "network.h" |
59 | #include "error.h" | |
b2718c72 | 60 | #include "parse.h" |
881450bb | 61 | #include "config.h" |
1b09f2c0 DL |
62 | #include "utils.h" |
63 | #include "conf.h" | |
64 | #include "log.h" | |
65 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
d55bc1ad | 66 | #include "caps.h" /* for lxc_caps_last_cap() */ |
36eb9bde | 67 | |
d0a36f2c SG |
68 | #if HAVE_APPARMOR |
69 | #include <apparmor.h> | |
70 | #endif | |
71 | ||
495d2046 SG |
72 | #if HAVE_SYS_CAPABILITY_H |
73 | #include <sys/capability.h> | |
74 | #endif | |
75 | ||
6ff05e18 SG |
76 | #if HAVE_SYS_PERSONALITY_H |
77 | #include <sys/personality.h> | |
78 | #endif | |
79 | ||
edaf8b1b SG |
80 | #if IS_BIONIC |
81 | #include <../include/lxcmntent.h> | |
82 | #else | |
83 | #include <mntent.h> | |
84 | #endif | |
85 | ||
769872f9 SH |
86 | #include "lxcseccomp.h" |
87 | ||
36eb9bde | 88 | lxc_log_define(lxc_conf, lxc); |
e5bda9ee | 89 | |
0ad19a3f | 90 | #define MAXHWLEN 18 |
91 | #define MAXINDEXLEN 20 | |
442cbbe6 | 92 | #define MAXMTULEN 16 |
0ad19a3f | 93 | #define MAXLINELEN 128 |
94 | ||
968fbd36 SK |
95 | #ifndef MS_DIRSYNC |
96 | #define MS_DIRSYNC 128 | |
97 | #endif | |
98 | ||
fdc03323 DL |
99 | #ifndef MS_REC |
100 | #define MS_REC 16384 | |
101 | #endif | |
102 | ||
c08556c6 DL |
103 | #ifndef MNT_DETACH |
104 | #define MNT_DETACH 2 | |
105 | #endif | |
106 | ||
859a6da0 NC |
107 | #ifndef MS_SLAVE |
108 | #define MS_SLAVE (1<<19) | |
109 | #endif | |
110 | ||
88d413d5 SW |
111 | #ifndef MS_RELATIME |
112 | #define MS_RELATIME (1 << 21) | |
113 | #endif | |
114 | ||
115 | #ifndef MS_STRICTATIME | |
116 | #define MS_STRICTATIME (1 << 24) | |
117 | #endif | |
118 | ||
495d2046 | 119 | #if HAVE_SYS_CAPABILITY_H |
b09094da MN |
120 | #ifndef CAP_SETFCAP |
121 | #define CAP_SETFCAP 31 | |
122 | #endif | |
123 | ||
124 | #ifndef CAP_MAC_OVERRIDE | |
125 | #define CAP_MAC_OVERRIDE 32 | |
126 | #endif | |
127 | ||
128 | #ifndef CAP_MAC_ADMIN | |
129 | #define CAP_MAC_ADMIN 33 | |
130 | #endif | |
495d2046 | 131 | #endif |
b09094da MN |
132 | |
133 | #ifndef PR_CAPBSET_DROP | |
134 | #define PR_CAPBSET_DROP 24 | |
135 | #endif | |
136 | ||
9818cae4 SG |
137 | #ifndef LO_FLAGS_AUTOCLEAR |
138 | #define LO_FLAGS_AUTOCLEAR 4 | |
139 | #endif | |
140 | ||
2d76d1d7 SG |
141 | /* Define pivot_root() if missing from the C library */ |
142 | #ifndef HAVE_PIVOT_ROOT | |
143 | static int pivot_root(const char * new_root, const char * put_old) | |
144 | { | |
145 | #ifdef __NR_pivot_root | |
146 | return syscall(__NR_pivot_root, new_root, put_old); | |
147 | #else | |
148 | errno = ENOSYS; | |
149 | return -1; | |
150 | #endif | |
151 | } | |
152 | #else | |
153 | extern int pivot_root(const char * new_root, const char * put_old); | |
154 | #endif | |
155 | ||
156 | /* Define sethostname() if missing from the C library */ | |
157 | #ifndef HAVE_SETHOSTNAME | |
158 | static int sethostname(const char * name, size_t len) | |
159 | { | |
160 | #ifdef __NR_sethostname | |
161 | return syscall(__NR_sethostname, name, len); | |
162 | #else | |
163 | errno = ENOSYS; | |
164 | return -1; | |
165 | #endif | |
166 | } | |
167 | #endif | |
168 | ||
72d0e1cb | 169 | char *lxchook_names[NUM_LXC_HOOKS] = { |
5ea6163a | 170 | "pre-start", "pre-mount", "mount", "start", "post-stop" }; |
72d0e1cb | 171 | |
e3b4c4c4 | 172 | typedef int (*instanciate_cb)(struct lxc_handler *, struct lxc_netdev *); |
0ad19a3f | 173 | |
998ac676 RT |
174 | struct mount_opt { |
175 | char *name; | |
176 | int clear; | |
177 | int flag; | |
178 | }; | |
179 | ||
81810dd1 DL |
180 | struct caps_opt { |
181 | char *name; | |
182 | int value; | |
183 | }; | |
184 | ||
e3b4c4c4 ST |
185 | static int instanciate_veth(struct lxc_handler *, struct lxc_netdev *); |
186 | static int instanciate_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
187 | static int instanciate_vlan(struct lxc_handler *, struct lxc_netdev *); | |
188 | static int instanciate_phys(struct lxc_handler *, struct lxc_netdev *); | |
189 | static int instanciate_empty(struct lxc_handler *, struct lxc_netdev *); | |
82d5ae15 | 190 | |
24654103 DL |
191 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
192 | [LXC_NET_VETH] = instanciate_veth, | |
193 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
194 | [LXC_NET_VLAN] = instanciate_vlan, | |
195 | [LXC_NET_PHYS] = instanciate_phys, | |
196 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 197 | }; |
198 | ||
74a2b586 JK |
199 | static int shutdown_veth(struct lxc_handler *, struct lxc_netdev *); |
200 | static int shutdown_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
201 | static int shutdown_vlan(struct lxc_handler *, struct lxc_netdev *); | |
202 | static int shutdown_phys(struct lxc_handler *, struct lxc_netdev *); | |
203 | static int shutdown_empty(struct lxc_handler *, struct lxc_netdev *); | |
204 | ||
205 | static instanciate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
206 | [LXC_NET_VETH] = shutdown_veth, | |
207 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
208 | [LXC_NET_VLAN] = shutdown_vlan, | |
209 | [LXC_NET_PHYS] = shutdown_phys, | |
210 | [LXC_NET_EMPTY] = shutdown_empty, | |
211 | }; | |
212 | ||
998ac676 | 213 | static struct mount_opt mount_opt[] = { |
88d413d5 SW |
214 | { "defaults", 0, 0 }, |
215 | { "ro", 0, MS_RDONLY }, | |
216 | { "rw", 1, MS_RDONLY }, | |
217 | { "suid", 1, MS_NOSUID }, | |
218 | { "nosuid", 0, MS_NOSUID }, | |
219 | { "dev", 1, MS_NODEV }, | |
220 | { "nodev", 0, MS_NODEV }, | |
221 | { "exec", 1, MS_NOEXEC }, | |
222 | { "noexec", 0, MS_NOEXEC }, | |
223 | { "sync", 0, MS_SYNCHRONOUS }, | |
224 | { "async", 1, MS_SYNCHRONOUS }, | |
225 | { "dirsync", 0, MS_DIRSYNC }, | |
226 | { "remount", 0, MS_REMOUNT }, | |
227 | { "mand", 0, MS_MANDLOCK }, | |
228 | { "nomand", 1, MS_MANDLOCK }, | |
229 | { "atime", 1, MS_NOATIME }, | |
230 | { "noatime", 0, MS_NOATIME }, | |
231 | { "diratime", 1, MS_NODIRATIME }, | |
232 | { "nodiratime", 0, MS_NODIRATIME }, | |
233 | { "bind", 0, MS_BIND }, | |
234 | { "rbind", 0, MS_BIND|MS_REC }, | |
235 | { "relatime", 0, MS_RELATIME }, | |
236 | { "norelatime", 1, MS_RELATIME }, | |
237 | { "strictatime", 0, MS_STRICTATIME }, | |
238 | { "nostrictatime", 1, MS_STRICTATIME }, | |
239 | { NULL, 0, 0 }, | |
998ac676 RT |
240 | }; |
241 | ||
495d2046 | 242 | #if HAVE_SYS_CAPABILITY_H |
81810dd1 | 243 | static struct caps_opt caps_opt[] = { |
a6afdde9 | 244 | { "chown", CAP_CHOWN }, |
1e11be34 DL |
245 | { "dac_override", CAP_DAC_OVERRIDE }, |
246 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
247 | { "fowner", CAP_FOWNER }, | |
248 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
249 | { "kill", CAP_KILL }, |
250 | { "setgid", CAP_SETGID }, | |
251 | { "setuid", CAP_SETUID }, | |
252 | { "setpcap", CAP_SETPCAP }, | |
253 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
254 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
255 | { "net_broadcast", CAP_NET_BROADCAST }, | |
256 | { "net_admin", CAP_NET_ADMIN }, | |
257 | { "net_raw", CAP_NET_RAW }, | |
258 | { "ipc_lock", CAP_IPC_LOCK }, | |
259 | { "ipc_owner", CAP_IPC_OWNER }, | |
260 | { "sys_module", CAP_SYS_MODULE }, | |
261 | { "sys_rawio", CAP_SYS_RAWIO }, | |
262 | { "sys_chroot", CAP_SYS_CHROOT }, | |
263 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
264 | { "sys_pacct", CAP_SYS_PACCT }, | |
265 | { "sys_admin", CAP_SYS_ADMIN }, | |
266 | { "sys_boot", CAP_SYS_BOOT }, | |
267 | { "sys_nice", CAP_SYS_NICE }, | |
268 | { "sys_resource", CAP_SYS_RESOURCE }, | |
269 | { "sys_time", CAP_SYS_TIME }, | |
270 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
271 | { "mknod", CAP_MKNOD }, | |
272 | { "lease", CAP_LEASE }, | |
9527e566 | 273 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 274 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
275 | #endif |
276 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 277 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 278 | #endif |
81810dd1 DL |
279 | { "setfcap", CAP_SETFCAP }, |
280 | { "mac_override", CAP_MAC_OVERRIDE }, | |
281 | { "mac_admin", CAP_MAC_ADMIN }, | |
5170c716 CS |
282 | #ifdef CAP_SYSLOG |
283 | { "syslog", CAP_SYSLOG }, | |
284 | #endif | |
285 | #ifdef CAP_WAKE_ALARM | |
286 | { "wake_alarm", CAP_WAKE_ALARM }, | |
287 | #endif | |
81810dd1 | 288 | }; |
495d2046 SG |
289 | #else |
290 | static struct caps_opt caps_opt[] = {}; | |
291 | #endif | |
81810dd1 | 292 | |
91c3830e SH |
293 | static int run_buffer(char *buffer) |
294 | { | |
295 | FILE *f; | |
296 | char *output; | |
297 | ||
298 | f = popen(buffer, "r"); | |
299 | if (!f) { | |
300 | SYSERROR("popen failed"); | |
301 | return -1; | |
302 | } | |
303 | ||
304 | output = malloc(LXC_LOG_BUFFER_SIZE); | |
305 | if (!output) { | |
306 | ERROR("failed to allocate memory for script output"); | |
307 | return -1; | |
308 | } | |
309 | ||
310 | while(fgets(output, LXC_LOG_BUFFER_SIZE, f)) | |
311 | DEBUG("script output: %s", output); | |
312 | ||
313 | free(output); | |
314 | ||
315 | if (pclose(f) == -1) { | |
316 | SYSERROR("Script exited on error"); | |
317 | return -1; | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
751d9dcd DL |
323 | static int run_script(const char *name, const char *section, |
324 | const char *script, ...) | |
e3b4c4c4 | 325 | { |
abbfd20b | 326 | int ret; |
91c3830e | 327 | char *buffer, *p; |
abbfd20b DL |
328 | size_t size = 0; |
329 | va_list ap; | |
751d9dcd DL |
330 | |
331 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
332 | script, name, section); | |
e3b4c4c4 | 333 | |
abbfd20b DL |
334 | va_start(ap, script); |
335 | while ((p = va_arg(ap, char *))) | |
95642a10 | 336 | size += strlen(p) + 1; |
abbfd20b DL |
337 | va_end(ap); |
338 | ||
339 | size += strlen(script); | |
340 | size += strlen(name); | |
341 | size += strlen(section); | |
95642a10 | 342 | size += 3; |
abbfd20b | 343 | |
95642a10 MS |
344 | if (size > INT_MAX) |
345 | return -1; | |
346 | ||
347 | buffer = alloca(size); | |
abbfd20b DL |
348 | if (!buffer) { |
349 | ERROR("failed to allocate memory"); | |
751d9dcd DL |
350 | return -1; |
351 | } | |
352 | ||
9ba8130c SH |
353 | ret = snprintf(buffer, size, "%s %s %s", script, name, section); |
354 | if (ret < 0 || ret >= size) { | |
355 | ERROR("Script name too long"); | |
356 | free(buffer); | |
357 | return -1; | |
358 | } | |
751d9dcd | 359 | |
abbfd20b | 360 | va_start(ap, script); |
9ba8130c SH |
361 | while ((p = va_arg(ap, char *))) { |
362 | int len = size-ret; | |
363 | int rc; | |
364 | rc = snprintf(buffer + ret, len, " %s", p); | |
365 | if (rc < 0 || rc >= len) { | |
366 | free(buffer); | |
367 | ERROR("Script args too long"); | |
368 | return -1; | |
369 | } | |
370 | ret += rc; | |
371 | } | |
abbfd20b | 372 | va_end(ap); |
751d9dcd | 373 | |
91c3830e | 374 | return run_buffer(buffer); |
e3b4c4c4 ST |
375 | } |
376 | ||
a6afdde9 | 377 | static int find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 378 | { |
379 | struct cbarg { | |
380 | const char *rootfs; | |
a6afdde9 | 381 | const char *target; |
78ae2fcc | 382 | int mntopt; |
383 | } *cbarg = data; | |
384 | ||
385 | char *fstype; | |
386 | ||
387 | /* we don't try 'nodev' entries */ | |
388 | if (strstr(buffer, "nodev")) | |
389 | return 0; | |
390 | ||
391 | fstype = buffer; | |
b2718c72 | 392 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
393 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 394 | |
a6afdde9 DL |
395 | DEBUG("trying to mount '%s'->'%s' with fstype '%s'", |
396 | cbarg->rootfs, cbarg->target, fstype); | |
397 | ||
398 | if (mount(cbarg->rootfs, cbarg->target, fstype, cbarg->mntopt, NULL)) { | |
399 | DEBUG("mount failed with error: %s", strerror(errno)); | |
78ae2fcc | 400 | return 0; |
a6afdde9 | 401 | } |
78ae2fcc | 402 | |
a6afdde9 DL |
403 | INFO("mounted '%s' on '%s', with fstype '%s'", |
404 | cbarg->rootfs, cbarg->target, fstype); | |
78ae2fcc | 405 | |
406 | return 1; | |
407 | } | |
408 | ||
2656d231 | 409 | static int mount_unknow_fs(const char *rootfs, const char *target, int mntopt) |
78ae2fcc | 410 | { |
a6afdde9 | 411 | int i; |
78ae2fcc | 412 | |
413 | struct cbarg { | |
414 | const char *rootfs; | |
a6afdde9 | 415 | const char *target; |
78ae2fcc | 416 | int mntopt; |
417 | } cbarg = { | |
418 | .rootfs = rootfs, | |
a6afdde9 | 419 | .target = target, |
78ae2fcc | 420 | .mntopt = mntopt, |
421 | }; | |
422 | ||
a6afdde9 DL |
423 | /* |
424 | * find the filesystem type with brute force: | |
425 | * first we check with /etc/filesystems, in case the modules | |
78ae2fcc | 426 | * are auto-loaded and fall back to the supported kernel fs |
427 | */ | |
428 | char *fsfile[] = { | |
429 | "/etc/filesystems", | |
430 | "/proc/filesystems", | |
431 | }; | |
432 | ||
a6afdde9 DL |
433 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { |
434 | ||
435 | int ret; | |
436 | ||
437 | if (access(fsfile[i], F_OK)) | |
438 | continue; | |
439 | ||
440 | ret = lxc_file_for_each_line(fsfile[i], find_fstype_cb, &cbarg); | |
441 | if (ret < 0) { | |
442 | ERROR("failed to parse '%s'", fsfile[i]); | |
443 | return -1; | |
444 | } | |
445 | ||
446 | if (ret) | |
447 | return 0; | |
78ae2fcc | 448 | } |
449 | ||
a6afdde9 DL |
450 | ERROR("failed to determine fs type for '%s'", rootfs); |
451 | return -1; | |
452 | } | |
453 | ||
2656d231 | 454 | static int mount_rootfs_dir(const char *rootfs, const char *target) |
a6afdde9 DL |
455 | { |
456 | return mount(rootfs, target, "none", MS_BIND | MS_REC, NULL); | |
457 | } | |
458 | ||
459 | static int setup_lodev(const char *rootfs, int fd, struct loop_info64 *loinfo) | |
460 | { | |
461 | int rfd; | |
462 | int ret = -1; | |
463 | ||
464 | rfd = open(rootfs, O_RDWR); | |
465 | if (rfd < 0) { | |
466 | SYSERROR("failed to open '%s'", rootfs); | |
78ae2fcc | 467 | return -1; |
468 | } | |
469 | ||
a6afdde9 | 470 | memset(loinfo, 0, sizeof(*loinfo)); |
78ae2fcc | 471 | |
a6afdde9 | 472 | loinfo->lo_flags = LO_FLAGS_AUTOCLEAR; |
78ae2fcc | 473 | |
a6afdde9 DL |
474 | if (ioctl(fd, LOOP_SET_FD, rfd)) { |
475 | SYSERROR("failed to LOOP_SET_FD"); | |
476 | goto out; | |
78ae2fcc | 477 | } |
478 | ||
a6afdde9 DL |
479 | if (ioctl(fd, LOOP_SET_STATUS64, loinfo)) { |
480 | SYSERROR("failed to LOOP_SET_STATUS64"); | |
78ae2fcc | 481 | goto out; |
482 | } | |
483 | ||
a6afdde9 | 484 | ret = 0; |
78ae2fcc | 485 | out: |
a6afdde9 | 486 | close(rfd); |
78ae2fcc | 487 | |
a6afdde9 | 488 | return ret; |
78ae2fcc | 489 | } |
490 | ||
2656d231 | 491 | static int mount_rootfs_file(const char *rootfs, const char *target) |
78ae2fcc | 492 | { |
a6afdde9 DL |
493 | struct dirent dirent, *direntp; |
494 | struct loop_info64 loinfo; | |
9ba8130c | 495 | int ret = -1, fd = -1, rc; |
a6afdde9 DL |
496 | DIR *dir; |
497 | char path[MAXPATHLEN]; | |
78ae2fcc | 498 | |
a6afdde9 DL |
499 | dir = opendir("/dev"); |
500 | if (!dir) { | |
501 | SYSERROR("failed to open '/dev'"); | |
78ae2fcc | 502 | return -1; |
503 | } | |
504 | ||
a6afdde9 DL |
505 | while (!readdir_r(dir, &dirent, &direntp)) { |
506 | ||
507 | if (!direntp) | |
508 | break; | |
509 | ||
510 | if (!strcmp(direntp->d_name, ".")) | |
511 | continue; | |
512 | ||
513 | if (!strcmp(direntp->d_name, "..")) | |
514 | continue; | |
515 | ||
516 | if (strncmp(direntp->d_name, "loop", 4)) | |
517 | continue; | |
518 | ||
9ba8130c SH |
519 | rc = snprintf(path, MAXPATHLEN, "/dev/%s", direntp->d_name); |
520 | if (rc < 0 || rc >= MAXPATHLEN) | |
521 | continue; | |
522 | ||
a6afdde9 DL |
523 | fd = open(path, O_RDWR); |
524 | if (fd < 0) | |
525 | continue; | |
526 | ||
527 | if (ioctl(fd, LOOP_GET_STATUS64, &loinfo) == 0) { | |
528 | close(fd); | |
529 | continue; | |
530 | } | |
531 | ||
532 | if (errno != ENXIO) { | |
533 | WARN("unexpected error for ioctl on '%s': %m", | |
534 | direntp->d_name); | |
535 | continue; | |
536 | } | |
537 | ||
538 | DEBUG("found '%s' free lodev", path); | |
539 | ||
540 | ret = setup_lodev(rootfs, fd, &loinfo); | |
541 | if (!ret) | |
2656d231 | 542 | ret = mount_unknow_fs(path, target, 0); |
a6afdde9 DL |
543 | close(fd); |
544 | ||
545 | break; | |
546 | } | |
547 | ||
548 | if (closedir(dir)) | |
549 | WARN("failed to close directory"); | |
550 | ||
551 | return ret; | |
78ae2fcc | 552 | } |
553 | ||
2656d231 | 554 | static int mount_rootfs_block(const char *rootfs, const char *target) |
a6afdde9 | 555 | { |
2656d231 | 556 | return mount_unknow_fs(rootfs, target, 0); |
a6afdde9 DL |
557 | } |
558 | ||
0c547523 SH |
559 | /* |
560 | * pin_rootfs | |
561 | * if rootfs is a directory, then open ${rootfs}.hold for writing for the | |
562 | * duration of the container run, to prevent the container from marking the | |
563 | * underlying fs readonly on shutdown. | |
564 | * return -1 on error. | |
565 | * return -2 if nothing needed to be pinned. | |
566 | * return an open fd (>=0) if we pinned it. | |
567 | */ | |
568 | int pin_rootfs(const char *rootfs) | |
569 | { | |
570 | char absrootfs[MAXPATHLEN]; | |
571 | char absrootfspin[MAXPATHLEN]; | |
572 | struct stat s; | |
573 | int ret, fd; | |
574 | ||
e99ee0de SH |
575 | if (rootfs == NULL || strlen(rootfs) == 0) |
576 | return 0; | |
577 | ||
0c547523 SH |
578 | if (!realpath(rootfs, absrootfs)) { |
579 | SYSERROR("failed to get real path for '%s'", rootfs); | |
580 | return -1; | |
581 | } | |
582 | ||
583 | if (access(absrootfs, F_OK)) { | |
584 | SYSERROR("'%s' is not accessible", absrootfs); | |
585 | return -1; | |
586 | } | |
587 | ||
588 | if (stat(absrootfs, &s)) { | |
589 | SYSERROR("failed to stat '%s'", absrootfs); | |
590 | return -1; | |
591 | } | |
592 | ||
593 | if (!__S_ISTYPE(s.st_mode, S_IFDIR)) | |
594 | return -2; | |
595 | ||
596 | ret = snprintf(absrootfspin, MAXPATHLEN, "%s%s", absrootfs, ".hold"); | |
597 | if (ret >= MAXPATHLEN) { | |
598 | SYSERROR("pathname too long for rootfs hold file"); | |
599 | return -1; | |
600 | } | |
601 | ||
602 | fd = open(absrootfspin, O_CREAT | O_RDWR, S_IWUSR|S_IRUSR); | |
603 | INFO("opened %s as fd %d\n", absrootfspin, fd); | |
604 | return fd; | |
605 | } | |
606 | ||
2656d231 | 607 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 608 | { |
b09ef133 | 609 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 610 | struct stat s; |
a6afdde9 | 611 | int i; |
78ae2fcc | 612 | |
a6afdde9 | 613 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 614 | |
615 | struct rootfs_type { | |
616 | int type; | |
617 | rootfs_cb cb; | |
618 | } rtfs_type[] = { | |
2656d231 DL |
619 | { S_IFDIR, mount_rootfs_dir }, |
620 | { S_IFBLK, mount_rootfs_block }, | |
621 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 622 | }; |
0ad19a3f | 623 | |
4c8ab83b | 624 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 625 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 626 | return -1; |
627 | } | |
b09ef133 | 628 | |
b09ef133 | 629 | if (access(absrootfs, F_OK)) { |
36eb9bde | 630 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 631 | return -1; |
632 | } | |
633 | ||
78ae2fcc | 634 | if (stat(absrootfs, &s)) { |
36eb9bde | 635 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 636 | return -1; |
637 | } | |
638 | ||
78ae2fcc | 639 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 640 | |
78ae2fcc | 641 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
642 | continue; | |
9b0f0477 | 643 | |
a6afdde9 | 644 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 645 | } |
9b0f0477 | 646 | |
36eb9bde | 647 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 648 | return -1; |
0ad19a3f | 649 | } |
650 | ||
4e5440c6 | 651 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 652 | { |
4e5440c6 DL |
653 | if (!utsname) |
654 | return 0; | |
0ad19a3f | 655 | |
4e5440c6 DL |
656 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
657 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 658 | return -1; |
659 | } | |
660 | ||
4e5440c6 | 661 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 662 | |
0ad19a3f | 663 | return 0; |
664 | } | |
665 | ||
33fcb7a0 | 666 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 667 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 668 | { |
7c6ef2a2 SH |
669 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
670 | int i, ret; | |
b0a33c1e | 671 | |
bc9bd0e3 DL |
672 | if (!rootfs->path) |
673 | return 0; | |
674 | ||
b0a33c1e | 675 | for (i = 0; i < tty_info->nbtty; i++) { |
676 | ||
677 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
678 | ||
7c6ef2a2 | 679 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 680 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
681 | if (ret >= sizeof(path)) { |
682 | ERROR("pathname too long for ttys"); | |
683 | return -1; | |
684 | } | |
685 | if (ttydir) { | |
686 | /* create dev/lxc/tty%d" */ | |
9ba8130c | 687 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", |
7c6ef2a2 SH |
688 | rootfs->mount, ttydir, i + 1); |
689 | if (ret >= sizeof(lxcpath)) { | |
690 | ERROR("pathname too long for ttys"); | |
691 | return -1; | |
692 | } | |
693 | ret = creat(lxcpath, 0660); | |
694 | if (ret==-1 && errno != EEXIST) { | |
695 | SYSERROR("error creating %s\n", lxcpath); | |
696 | return -1; | |
697 | } | |
698 | close(ret); | |
699 | ret = unlink(path); | |
700 | if (ret && errno != ENOENT) { | |
701 | SYSERROR("error unlinking %s\n", path); | |
702 | return -1; | |
703 | } | |
b0a33c1e | 704 | |
7c6ef2a2 SH |
705 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
706 | WARN("failed to mount '%s'->'%s'", | |
707 | pty_info->name, path); | |
708 | continue; | |
709 | } | |
13954cce | 710 | |
9ba8130c SH |
711 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
712 | if (ret >= sizeof(lxcpath)) { | |
713 | ERROR("tty pathname too long"); | |
714 | return -1; | |
715 | } | |
7c6ef2a2 SH |
716 | ret = symlink(lxcpath, path); |
717 | if (ret) { | |
718 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
719 | return -1; | |
720 | } | |
721 | } else { | |
c6883f38 SH |
722 | /* If we populated /dev, then we need to create /dev/ttyN */ |
723 | if (access(path, F_OK)) { | |
724 | ret = creat(path, 0660); | |
725 | if (ret==-1) { | |
726 | SYSERROR("error creating %s\n", path); | |
727 | /* this isn't fatal, continue */ | |
728 | } else | |
729 | close(ret); | |
730 | } | |
7c6ef2a2 SH |
731 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
732 | WARN("failed to mount '%s'->'%s'", | |
733 | pty_info->name, path); | |
734 | continue; | |
735 | } | |
b0a33c1e | 736 | } |
737 | } | |
738 | ||
cd54d859 DL |
739 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
740 | ||
b0a33c1e | 741 | return 0; |
742 | } | |
743 | ||
7a7ff0c6 | 744 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
745 | { |
746 | struct lxc_list *mountlist, *listentry, *iterator; | |
747 | char *pivotdir, *mountpoint, *mountentry; | |
748 | int found; | |
749 | void **cbparm; | |
750 | ||
751 | mountentry = buffer; | |
752 | cbparm = (void **)data; | |
753 | ||
754 | mountlist = cbparm[0]; | |
755 | pivotdir = cbparm[1]; | |
756 | ||
757 | /* parse entry, first field is mountname, ignore */ | |
758 | mountpoint = strtok(mountentry, " "); | |
759 | if (!mountpoint) | |
760 | return -1; | |
761 | ||
762 | /* second field is mountpoint */ | |
763 | mountpoint = strtok(NULL, " "); | |
764 | if (!mountpoint) | |
765 | return -1; | |
766 | ||
767 | /* only consider mountpoints below old root fs */ | |
768 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
769 | return 0; | |
770 | ||
771 | /* filter duplicate mountpoints */ | |
772 | found = 0; | |
773 | lxc_list_for_each(iterator, mountlist) { | |
774 | if (!strcmp(iterator->elem, mountpoint)) { | |
775 | found = 1; | |
776 | break; | |
777 | } | |
778 | } | |
779 | if (found) | |
780 | return 0; | |
781 | ||
782 | /* add entry to list */ | |
783 | listentry = malloc(sizeof(*listentry)); | |
784 | if (!listentry) { | |
785 | SYSERROR("malloc for mountpoint listentry failed"); | |
786 | return -1; | |
787 | } | |
788 | ||
789 | listentry->elem = strdup(mountpoint); | |
790 | if (!listentry->elem) { | |
791 | SYSERROR("strdup failed"); | |
792 | return -1; | |
793 | } | |
794 | lxc_list_add_tail(mountlist, listentry); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
cc6f6dd7 | 799 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 800 | { |
2382ecff | 801 | char path[MAXPATHLEN]; |
bf601689 | 802 | void *cbparm[2]; |
9ebb03ad | 803 | struct lxc_list mountlist, *iterator, *next; |
bf601689 | 804 | int ok, still_mounted, last_still_mounted; |
9ba8130c | 805 | int rc; |
bf601689 MH |
806 | |
807 | /* read and parse /proc/mounts in old root fs */ | |
808 | lxc_list_init(&mountlist); | |
809 | ||
cc6f6dd7 | 810 | /* oldrootfs is on the top tree directory now */ |
9ba8130c SH |
811 | rc = snprintf(path, sizeof(path), "/%s", oldrootfs); |
812 | if (rc >= sizeof(path)) { | |
813 | ERROR("rootfs name too long"); | |
814 | return -1; | |
815 | } | |
bf601689 | 816 | cbparm[0] = &mountlist; |
bf601689 | 817 | |
cc6f6dd7 | 818 | cbparm[1] = strdup(path); |
bf601689 MH |
819 | if (!cbparm[1]) { |
820 | SYSERROR("strdup failed"); | |
821 | return -1; | |
822 | } | |
823 | ||
9ba8130c SH |
824 | rc = snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
825 | if (rc >= sizeof(path)) { | |
826 | ERROR("container proc/mounts name too long"); | |
827 | return -1; | |
828 | } | |
cc6f6dd7 DL |
829 | |
830 | ok = lxc_file_for_each_line(path, | |
831 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
832 | if (ok < 0) { |
833 | SYSERROR("failed to read or parse mount list '%s'", path); | |
834 | return -1; | |
835 | } | |
836 | ||
837 | /* umount filesystems until none left or list no longer shrinks */ | |
838 | still_mounted = 0; | |
839 | do { | |
840 | last_still_mounted = still_mounted; | |
841 | still_mounted = 0; | |
842 | ||
9ebb03ad | 843 | lxc_list_for_each_safe(iterator, &mountlist, next) { |
bf601689 | 844 | |
c08556c6 | 845 | /* umount normally */ |
bf601689 MH |
846 | if (!umount(iterator->elem)) { |
847 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
848 | lxc_list_del(iterator); | |
849 | continue; | |
850 | } | |
851 | ||
bf601689 MH |
852 | still_mounted++; |
853 | } | |
7df119ee | 854 | |
bf601689 MH |
855 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
856 | ||
7df119ee | 857 | |
c08556c6 DL |
858 | lxc_list_for_each(iterator, &mountlist) { |
859 | ||
860 | /* let's try a lazy umount */ | |
861 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
862 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
863 | continue; | |
864 | } | |
865 | ||
866 | /* be more brutal (nfs) */ | |
867 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
868 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
869 | continue; | |
870 | } | |
871 | ||
7df119ee | 872 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 873 | } |
bf601689 | 874 | |
cc6f6dd7 DL |
875 | return 0; |
876 | } | |
877 | ||
878 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
879 | { | |
880 | char path[MAXPATHLEN]; | |
881 | int remove_pivotdir = 0; | |
9ba8130c | 882 | int rc; |
cc6f6dd7 DL |
883 | |
884 | /* change into new root fs */ | |
885 | if (chdir(rootfs)) { | |
886 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
887 | return -1; | |
888 | } | |
889 | ||
890 | if (!pivotdir) | |
30c5d292 | 891 | pivotdir = "lxc_putold"; |
cc6f6dd7 | 892 | |
4f9293b1 | 893 | /* compute the full path to pivotdir under rootfs */ |
9ba8130c SH |
894 | rc = snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
895 | if (rc >= sizeof(path)) { | |
896 | ERROR("pivot dir name too long"); | |
897 | return -1; | |
898 | } | |
cc6f6dd7 DL |
899 | |
900 | if (access(path, F_OK)) { | |
901 | ||
902 | if (mkdir_p(path, 0755)) { | |
903 | SYSERROR("failed to create pivotdir '%s'", path); | |
904 | return -1; | |
905 | } | |
906 | ||
907 | remove_pivotdir = 1; | |
908 | DEBUG("created '%s' directory", path); | |
909 | } | |
910 | ||
911 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
912 | ||
913 | /* pivot_root into our new root fs */ | |
914 | if (pivot_root(".", path)) { | |
915 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
916 | return -1; |
917 | } | |
cc6f6dd7 DL |
918 | |
919 | if (chdir("/")) { | |
920 | SYSERROR("can't chdir to / after pivot_root"); | |
921 | return -1; | |
922 | } | |
923 | ||
924 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
925 | ||
926 | /* we switch from absolute path to relative path */ | |
927 | if (umount_oldrootfs(pivotdir)) | |
928 | return -1; | |
bf601689 | 929 | |
c08556c6 DL |
930 | /* remove temporary mount point, we don't consider the removing |
931 | * as fatal */ | |
a91d897a FW |
932 | if (remove_pivotdir && rmdir(pivotdir)) |
933 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 934 | |
bf601689 MH |
935 | return 0; |
936 | } | |
937 | ||
91c3830e SH |
938 | /* |
939 | * Do we want to add options for max size of /dev and a file to | |
940 | * specify which devices to create? | |
941 | */ | |
942 | static int mount_autodev(char *root) | |
943 | { | |
944 | int ret; | |
945 | char path[MAXPATHLEN]; | |
946 | ||
947 | INFO("Mounting /dev under %s\n", root); | |
948 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); | |
949 | if (ret < 0 || ret > MAXPATHLEN) | |
950 | return -1; | |
951 | ret = mount("none", path, "tmpfs", 0, "size=100000"); | |
952 | if (ret) { | |
953 | SYSERROR("Failed to mount /dev at %s\n", root); | |
954 | return -1; | |
955 | } | |
956 | ret = snprintf(path, MAXPATHLEN, "%s/dev/pts", root); | |
957 | if (ret < 0 || ret >= MAXPATHLEN) | |
958 | return -1; | |
959 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
960 | if (ret) { | |
961 | SYSERROR("Failed to create /dev/pts in container"); | |
962 | return -1; | |
963 | } | |
964 | ||
965 | INFO("Mounted /dev under %s\n", root); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | /* | |
970 | * Try to run MAKEDEV console in the container. If something fails, | |
971 | * continue anyway as it should not be detrimental to the container. | |
972 | * This makes sure that things like /dev/vcs* exist. | |
973 | * (Pass devpath in to reduce stack usage) | |
974 | */ | |
975 | static void run_makedev(char *devpath) | |
976 | { | |
977 | int curd; | |
978 | int ret; | |
979 | ||
980 | curd = open(".", O_RDONLY); | |
981 | if (curd < 0) | |
982 | return; | |
983 | ret = chdir(devpath); | |
984 | if (ret) { | |
985 | close(curd); | |
986 | return; | |
987 | } | |
988 | if (run_buffer("/sbin/MAKEDEV console")) | |
989 | INFO("Error running MAKEDEV console in %s", devpath); | |
61435768 SH |
990 | ret = fchdir(curd); |
991 | if (ret) | |
992 | INFO("Error returning to original directory: expect breakage"); | |
91c3830e SH |
993 | close(curd); |
994 | } | |
995 | ||
c6883f38 SH |
996 | struct lxc_devs { |
997 | char *name; | |
998 | mode_t mode; | |
999 | int maj; | |
1000 | int min; | |
1001 | }; | |
1002 | ||
1003 | struct lxc_devs lxc_devs[] = { | |
1004 | { "null", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 3 }, | |
1005 | { "zero", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 5 }, | |
1006 | { "full", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 7 }, | |
1007 | { "urandom", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 9 }, | |
1008 | { "random", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 8 }, | |
1009 | { "tty", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 5, 0 }, | |
1010 | { "console", S_IFCHR | S_IRUSR | S_IWUSR, 5, 1 }, | |
1011 | }; | |
1012 | ||
c6883f38 SH |
1013 | static int setup_autodev(char *root) |
1014 | { | |
1015 | int ret; | |
1016 | struct lxc_devs *d; | |
1017 | char path[MAXPATHLEN]; | |
1018 | int i; | |
3a32201c | 1019 | mode_t cmask; |
c6883f38 | 1020 | |
91c3830e SH |
1021 | INFO("Creating initial consoles under %s/dev\n", root); |
1022 | ||
c6883f38 | 1023 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); |
91c3830e SH |
1024 | if (ret < 0 || ret >= MAXPATHLEN) { |
1025 | ERROR("Error calculating container /dev location"); | |
c6883f38 | 1026 | return -1; |
91c3830e SH |
1027 | } else |
1028 | run_makedev(path); | |
1029 | ||
1030 | INFO("Populating /dev under %s\n", root); | |
3a32201c | 1031 | cmask = umask(S_IXUSR | S_IXGRP | S_IXOTH); |
c6883f38 SH |
1032 | for (i = 0; i < sizeof(lxc_devs) / sizeof(lxc_devs[0]); i++) { |
1033 | d = &lxc_devs[i]; | |
1034 | ret = snprintf(path, MAXPATHLEN, "%s/dev/%s", root, d->name); | |
1035 | if (ret < 0 || ret >= MAXPATHLEN) | |
1036 | return -1; | |
1037 | ret = mknod(path, d->mode, makedev(d->maj, d->min)); | |
91c3830e | 1038 | if (ret && errno != EEXIST) { |
c6883f38 SH |
1039 | SYSERROR("Error creating %s\n", d->name); |
1040 | return -1; | |
1041 | } | |
1042 | } | |
3a32201c | 1043 | umask(cmask); |
c6883f38 SH |
1044 | |
1045 | INFO("Populated /dev under %s\n", root); | |
1046 | return 0; | |
1047 | } | |
1048 | ||
cc28d0b0 SH |
1049 | /* |
1050 | * Detect whether / is mounted MS_SHARED. The only way I know of to | |
1051 | * check that is through /proc/self/mountinfo. | |
1052 | * I'm only checking for /. If the container rootfs or mount location | |
1053 | * is MS_SHARED, but not '/', then you're out of luck - figuring that | |
1054 | * out would be too much work to be worth it. | |
1055 | */ | |
1056 | #define LINELEN 4096 | |
1057 | int detect_shared_rootfs(void) | |
1058 | { | |
1059 | char buf[LINELEN], *p; | |
1060 | FILE *f; | |
1061 | int i; | |
1062 | char *p2; | |
1063 | ||
1064 | f = fopen("/proc/self/mountinfo", "r"); | |
1065 | if (!f) | |
1066 | return 0; | |
1067 | while ((p = fgets(buf, LINELEN, f))) { | |
1068 | INFO("looking at .%s.", p); | |
1069 | for (p = buf, i=0; p && i < 4; i++) | |
1070 | p = index(p+1, ' '); | |
1071 | if (!p) | |
1072 | continue; | |
1073 | p2 = index(p+1, ' '); | |
1074 | if (!p2) | |
1075 | continue; | |
1076 | *p2 = '\0'; | |
1077 | INFO("now p is .%s.", p); | |
1078 | if (strcmp(p+1, "/") == 0) { | |
1079 | // this is '/'. is it shared? | |
1080 | p = index(p2+1, ' '); | |
1081 | if (strstr(p, "shared:")) | |
1082 | return 1; | |
1083 | } | |
1084 | } | |
1085 | fclose(f); | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * I'll forgive you for asking whether all of this is needed :) The | |
1091 | * answer is yes. | |
1092 | * pivot_root will fail if the new root, the put_old dir, or the parent | |
1093 | * of current->fs->root are MS_SHARED. (parent of current->fs_root may | |
1094 | * or may not be current->fs_root - if we assumed it always was, we could | |
1095 | * just mount --make-rslave /). So, | |
1096 | * 1. mount a tiny tmpfs to be parent of current->fs->root. | |
1097 | * 2. make that MS_SLAVE | |
1098 | * 3. make a 'root' directory under that | |
1099 | * 4. mount --rbind / under the $tinyroot/root. | |
1100 | * 5. make that rslave | |
1101 | * 6. chdir and chroot into $tinyroot/root | |
1102 | * 7. $tinyroot will be unmounted by our parent in start.c | |
1103 | */ | |
1104 | static int chroot_into_slave(struct lxc_conf *conf) | |
1105 | { | |
1106 | char path[MAXPATHLEN]; | |
1107 | const char *destpath = conf->rootfs.mount; | |
1108 | int ret; | |
1109 | ||
1110 | if (mount(destpath, destpath, NULL, MS_BIND, 0)) { | |
1111 | SYSERROR("failed to mount %s bind", destpath); | |
1112 | return -1; | |
1113 | } | |
1114 | if (mount("", destpath, NULL, MS_SLAVE, 0)) { | |
1115 | SYSERROR("failed to make %s slave", destpath); | |
1116 | return -1; | |
1117 | } | |
1118 | if (mount("none", destpath, "tmpfs", 0, "size=10000")) { | |
1119 | SYSERROR("Failed to mount tmpfs / at %s", destpath); | |
1120 | return -1; | |
1121 | } | |
1122 | ret = snprintf(path, MAXPATHLEN, "%s/root", destpath); | |
1123 | if (ret < 0 || ret >= MAXPATHLEN) { | |
1124 | ERROR("out of memory making root path"); | |
1125 | return -1; | |
1126 | } | |
1127 | if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)) { | |
1128 | SYSERROR("Failed to create /dev/pts in container"); | |
1129 | return -1; | |
1130 | } | |
1131 | if (mount("/", path, NULL, MS_BIND|MS_REC, 0)) { | |
1132 | SYSERROR("Failed to rbind mount / to %s", path); | |
1133 | return -1; | |
1134 | } | |
1135 | if (mount("", destpath, NULL, MS_SLAVE|MS_REC, 0)) { | |
1136 | SYSERROR("Failed to make tmp-/ at %s rslave", path); | |
1137 | return -1; | |
1138 | } | |
1139 | if (chdir(path)) { | |
1140 | SYSERROR("Failed to chdir into tmp-/"); | |
1141 | return -1; | |
1142 | } | |
1143 | if (chroot(path)) { | |
1144 | SYSERROR("Failed to chroot into tmp-/"); | |
1145 | return -1; | |
1146 | } | |
1147 | INFO("Chrooted into tmp-/ at %s\n", path); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | static int setup_rootfs(struct lxc_conf *conf) | |
0ad19a3f | 1152 | { |
cc28d0b0 SH |
1153 | const struct lxc_rootfs *rootfs = &conf->rootfs; |
1154 | ||
33fcb7a0 | 1155 | if (!rootfs->path) |
c69bd12f | 1156 | return 0; |
0ad19a3f | 1157 | |
12297168 | 1158 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 1159 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 1160 | rootfs->mount); |
b1789442 DL |
1161 | return -1; |
1162 | } | |
1163 | ||
cc28d0b0 SH |
1164 | if (detect_shared_rootfs()) { |
1165 | if (chroot_into_slave(conf)) { | |
1166 | ERROR("Failed to chroot into slave /"); | |
1167 | return -1; | |
1168 | } | |
1169 | } | |
1170 | ||
2656d231 | 1171 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 1172 | ERROR("failed to mount rootfs"); |
c3f0a28c | 1173 | return -1; |
1174 | } | |
0ad19a3f | 1175 | |
12297168 | 1176 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 1177 | |
ac778708 DL |
1178 | return 0; |
1179 | } | |
1180 | ||
1181 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
1182 | { | |
ac778708 DL |
1183 | if (!rootfs->path) |
1184 | return 0; | |
1185 | ||
12297168 | 1186 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 1187 | ERROR("failed to setup pivot root"); |
25368b52 | 1188 | return -1; |
c69bd12f DL |
1189 | } |
1190 | ||
25368b52 | 1191 | return 0; |
0ad19a3f | 1192 | } |
1193 | ||
d852c78c | 1194 | static int setup_pts(int pts) |
3c26f34e | 1195 | { |
77890c6d SW |
1196 | char target[PATH_MAX]; |
1197 | ||
d852c78c DL |
1198 | if (!pts) |
1199 | return 0; | |
3c26f34e | 1200 | |
1201 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 1202 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 1203 | return -1; |
1204 | } | |
1205 | ||
a6afdde9 DL |
1206 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
1207 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 1208 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 1209 | return -1; |
1210 | } | |
1211 | ||
3c26f34e | 1212 | if (access("/dev/ptmx", F_OK)) { |
1213 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
1214 | goto out; | |
36eb9bde | 1215 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1216 | return -1; |
1217 | } | |
1218 | ||
77890c6d SW |
1219 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
1220 | goto out; | |
1221 | ||
3c26f34e | 1222 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
1223 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 1224 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1225 | return -1; |
1226 | } | |
cd54d859 DL |
1227 | |
1228 | INFO("created new pts instance"); | |
d852c78c | 1229 | |
3c26f34e | 1230 | out: |
1231 | return 0; | |
1232 | } | |
1233 | ||
cccc74b5 DL |
1234 | static int setup_personality(int persona) |
1235 | { | |
6ff05e18 | 1236 | #if HAVE_SYS_PERSONALITY_H |
cccc74b5 DL |
1237 | if (persona == -1) |
1238 | return 0; | |
1239 | ||
1240 | if (personality(persona) < 0) { | |
1241 | SYSERROR("failed to set personality to '0x%x'", persona); | |
1242 | return -1; | |
1243 | } | |
1244 | ||
1245 | INFO("set personality to '0x%x'", persona); | |
6ff05e18 | 1246 | #endif |
cccc74b5 DL |
1247 | |
1248 | return 0; | |
1249 | } | |
1250 | ||
7c6ef2a2 | 1251 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 1252 | const struct lxc_console *console) |
6e590161 | 1253 | { |
63376d7d DL |
1254 | char path[MAXPATHLEN]; |
1255 | struct stat s; | |
7c6ef2a2 | 1256 | int ret; |
52e35957 | 1257 | |
7c6ef2a2 SH |
1258 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
1259 | if (ret >= sizeof(path)) { | |
1260 | ERROR("console path too long\n"); | |
1261 | return -1; | |
1262 | } | |
52e35957 | 1263 | |
63376d7d | 1264 | if (access(path, F_OK)) { |
466978b0 | 1265 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 1266 | return 0; |
52e35957 DL |
1267 | } |
1268 | ||
f78a1f32 | 1269 | if (console->peer == -1) { |
63376d7d | 1270 | INFO("no console output required"); |
f78a1f32 DL |
1271 | return 0; |
1272 | } | |
ed502555 | 1273 | |
63376d7d DL |
1274 | if (stat(path, &s)) { |
1275 | SYSERROR("failed to stat '%s'", path); | |
1276 | return -1; | |
1277 | } | |
1278 | ||
1279 | if (chmod(console->name, s.st_mode)) { | |
1280 | SYSERROR("failed to set mode '0%o' to '%s'", | |
1281 | s.st_mode, console->name); | |
1282 | return -1; | |
1283 | } | |
13954cce | 1284 | |
63376d7d DL |
1285 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
1286 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 1287 | return -1; |
1288 | } | |
1289 | ||
63376d7d | 1290 | INFO("console has been setup"); |
7c6ef2a2 SH |
1291 | return 0; |
1292 | } | |
1293 | ||
1294 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
1295 | const struct lxc_console *console, | |
1296 | char *ttydir) | |
1297 | { | |
1298 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
1299 | int ret; | |
1300 | ||
1301 | /* create rootfs/dev/<ttydir> directory */ | |
1302 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
1303 | ttydir); | |
1304 | if (ret >= sizeof(path)) | |
1305 | return -1; | |
1306 | ret = mkdir(path, 0755); | |
1307 | if (ret && errno != EEXIST) { | |
1308 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
1309 | return -1; | |
1310 | } | |
1311 | INFO("created %s\n", path); | |
1312 | ||
1313 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
1314 | rootfs->mount, ttydir); | |
1315 | if (ret >= sizeof(lxcpath)) { | |
1316 | ERROR("console path too long\n"); | |
1317 | return -1; | |
1318 | } | |
1319 | ||
1320 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
1321 | ret = unlink(path); | |
1322 | if (ret && errno != ENOENT) { | |
1323 | SYSERROR("error unlinking %s\n", path); | |
1324 | return -1; | |
1325 | } | |
1326 | ||
1327 | ret = creat(lxcpath, 0660); | |
1328 | if (ret==-1 && errno != EEXIST) { | |
1329 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
1330 | return -1; | |
1331 | } | |
1332 | close(ret); | |
1333 | ||
1334 | if (console->peer == -1) { | |
1335 | INFO("no console output required"); | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
1340 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
1341 | return -1; | |
1342 | } | |
1343 | ||
1344 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
9ba8130c SH |
1345 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); |
1346 | if (ret >= sizeof(lxcpath)) { | |
1347 | ERROR("lxc/console path too long"); | |
1348 | return -1; | |
1349 | } | |
7c6ef2a2 SH |
1350 | ret = symlink(lxcpath, path); |
1351 | if (ret) { | |
1352 | SYSERROR("failed to create symlink for console"); | |
1353 | return -1; | |
1354 | } | |
1355 | ||
1356 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 1357 | |
6e590161 | 1358 | return 0; |
1359 | } | |
1360 | ||
7c6ef2a2 SH |
1361 | static int setup_console(const struct lxc_rootfs *rootfs, |
1362 | const struct lxc_console *console, | |
1363 | char *ttydir) | |
1364 | { | |
1365 | /* We don't have a rootfs, /dev/console will be shared */ | |
1366 | if (!rootfs->path) | |
1367 | return 0; | |
1368 | if (!ttydir) | |
1369 | return setup_dev_console(rootfs, console); | |
1370 | ||
1371 | return setup_ttydir_console(rootfs, console, ttydir); | |
1372 | } | |
1373 | ||
1bd051a6 SH |
1374 | static int setup_kmsg(const struct lxc_rootfs *rootfs, |
1375 | const struct lxc_console *console) | |
1376 | { | |
1377 | char kpath[MAXPATHLEN]; | |
1378 | int ret; | |
1379 | ||
222fea5a DE |
1380 | if (!rootfs->path) |
1381 | return 0; | |
1bd051a6 SH |
1382 | ret = snprintf(kpath, sizeof(kpath), "%s/dev/kmsg", rootfs->mount); |
1383 | if (ret < 0 || ret >= sizeof(kpath)) | |
1384 | return -1; | |
1385 | ||
1386 | ret = unlink(kpath); | |
1387 | if (ret && errno != ENOENT) { | |
1388 | SYSERROR("error unlinking %s\n", kpath); | |
1389 | return -1; | |
1390 | } | |
1391 | ||
1392 | ret = symlink("console", kpath); | |
1393 | if (ret) { | |
1394 | SYSERROR("failed to create symlink for kmsg"); | |
1395 | return -1; | |
1396 | } | |
1397 | ||
1398 | return 0; | |
1399 | } | |
1400 | ||
cc28d0b0 | 1401 | int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 1402 | { |
102a5303 DL |
1403 | struct lxc_list *iterator; |
1404 | struct lxc_cgroup *cg; | |
88329c69 | 1405 | int ret = -1; |
6f4a3756 | 1406 | |
102a5303 DL |
1407 | if (lxc_list_empty(cgroups)) |
1408 | return 0; | |
6f4a3756 | 1409 | |
102a5303 | 1410 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 1411 | |
102a5303 | 1412 | cg = iterator->elem; |
6f4a3756 | 1413 | |
102a5303 | 1414 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 1415 | goto out; |
6f4a3756 | 1416 | |
102a5303 | 1417 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 1418 | } |
13954cce | 1419 | |
88329c69 | 1420 | ret = 0; |
cd54d859 | 1421 | INFO("cgroup has been setup"); |
88329c69 MN |
1422 | out: |
1423 | return ret; | |
576f946d | 1424 | } |
1425 | ||
998ac676 RT |
1426 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
1427 | { | |
1428 | struct mount_opt *mo; | |
1429 | ||
1430 | /* If opt is found in mount_opt, set or clear flags. | |
1431 | * Otherwise append it to data. */ | |
1432 | ||
1433 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1434 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1435 | if (mo->clear) | |
1436 | *flags &= ~mo->flag; | |
1437 | else | |
1438 | *flags |= mo->flag; | |
1439 | return; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | if (strlen(*data)) | |
1444 | strcat(*data, ","); | |
1445 | strcat(*data, opt); | |
1446 | } | |
1447 | ||
911324ef | 1448 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1449 | char **mntdata) |
1450 | { | |
1451 | char *s, *data; | |
1452 | char *p, *saveptr = NULL; | |
1453 | ||
911324ef | 1454 | *mntdata = NULL; |
91656ce5 | 1455 | *mntflags = 0L; |
911324ef DL |
1456 | |
1457 | if (!mntopts) | |
998ac676 RT |
1458 | return 0; |
1459 | ||
911324ef | 1460 | s = strdup(mntopts); |
998ac676 | 1461 | if (!s) { |
36eb9bde | 1462 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1463 | return -1; |
1464 | } | |
1465 | ||
1466 | data = malloc(strlen(s) + 1); | |
1467 | if (!data) { | |
36eb9bde | 1468 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1469 | free(s); |
1470 | return -1; | |
1471 | } | |
1472 | *data = 0; | |
1473 | ||
1474 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1475 | p = strtok_r(NULL, ",", &saveptr)) | |
1476 | parse_mntopt(p, mntflags, &data); | |
1477 | ||
1478 | if (*data) | |
1479 | *mntdata = data; | |
1480 | else | |
1481 | free(data); | |
1482 | free(s); | |
1483 | ||
1484 | return 0; | |
1485 | } | |
1486 | ||
911324ef DL |
1487 | static int mount_entry(const char *fsname, const char *target, |
1488 | const char *fstype, unsigned long mountflags, | |
1489 | const char *data) | |
1490 | { | |
1491 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1492 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1493 | return -1; | |
1494 | } | |
1495 | ||
1496 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1497 | ||
1498 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1499 | fsname, target); | |
1500 | ||
1501 | if (mount(fsname, target, fstype, | |
1502 | mountflags | MS_REMOUNT, data)) { | |
1503 | SYSERROR("failed to mount '%s' on '%s'", | |
1504 | fsname, target); | |
1505 | return -1; | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1515 | { |
998ac676 RT |
1516 | unsigned long mntflags; |
1517 | char *mntdata; | |
911324ef DL |
1518 | int ret; |
1519 | ||
1520 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1521 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1522 | return -1; | |
1523 | } | |
1524 | ||
1525 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1526 | mntent->mnt_type, mntflags, mntdata); | |
1527 | ||
1528 | free(mntdata); | |
1529 | ||
1530 | return ret; | |
1531 | } | |
1532 | ||
1533 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
80a881b2 SH |
1534 | const struct lxc_rootfs *rootfs, |
1535 | const char *lxc_name) | |
911324ef | 1536 | { |
013bd428 | 1537 | char *aux; |
59760f5d | 1538 | char path[MAXPATHLEN]; |
911324ef DL |
1539 | unsigned long mntflags; |
1540 | char *mntdata; | |
80a881b2 | 1541 | int r, ret = 0, offset; |
0ad19a3f | 1542 | |
911324ef DL |
1543 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1544 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1545 | return -1; | |
1546 | } | |
1bc60a65 | 1547 | |
80a881b2 | 1548 | /* if rootfs->path is a blockdev path, allow container fstab to |
e29bf450 DE |
1549 | * use $LXCPATH/CN/rootfs as the target prefix */ |
1550 | r = snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs", lxc_name); | |
80a881b2 SH |
1551 | if (r < 0 || r >= MAXPATHLEN) |
1552 | goto skipvarlib; | |
1553 | ||
1554 | aux = strstr(mntent->mnt_dir, path); | |
1555 | if (aux) { | |
1556 | offset = strlen(path); | |
1557 | goto skipabs; | |
1558 | } | |
1559 | ||
1560 | skipvarlib: | |
013bd428 DL |
1561 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1562 | if (!aux) { | |
1563 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1564 | goto out; | |
1565 | } | |
80a881b2 SH |
1566 | offset = strlen(rootfs->path); |
1567 | ||
1568 | skipabs: | |
013bd428 | 1569 | |
9ba8130c | 1570 | r = snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
80a881b2 SH |
1571 | aux + offset); |
1572 | if (r < 0 || r >= MAXPATHLEN) { | |
1573 | WARN("pathnme too long for '%s'", mntent->mnt_dir); | |
1574 | ret = -1; | |
1575 | goto out; | |
1576 | } | |
1577 | ||
d330fe7b | 1578 | |
013bd428 | 1579 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1580 | mntflags, mntdata); |
0ad19a3f | 1581 | |
013bd428 | 1582 | out: |
911324ef DL |
1583 | free(mntdata); |
1584 | return ret; | |
1585 | } | |
d330fe7b | 1586 | |
911324ef DL |
1587 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1588 | const char *rootfs) | |
1589 | { | |
1590 | char path[MAXPATHLEN]; | |
1591 | unsigned long mntflags; | |
1592 | char *mntdata; | |
1593 | int ret; | |
d330fe7b | 1594 | |
911324ef DL |
1595 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1596 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1597 | return -1; | |
1598 | } | |
d330fe7b | 1599 | |
911324ef | 1600 | /* relative to root mount point */ |
9ba8130c SH |
1601 | ret = snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); |
1602 | if (ret >= sizeof(path)) { | |
1603 | ERROR("path name too long"); | |
1604 | return -1; | |
1605 | } | |
911324ef DL |
1606 | |
1607 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1608 | mntflags, mntdata); | |
1609 | ||
1610 | free(mntdata); | |
998ac676 | 1611 | |
911324ef DL |
1612 | return ret; |
1613 | } | |
1614 | ||
80a881b2 SH |
1615 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file, |
1616 | const char *lxc_name) | |
911324ef DL |
1617 | { |
1618 | struct mntent *mntent; | |
1619 | int ret = -1; | |
e76b8764 | 1620 | |
911324ef | 1621 | while ((mntent = getmntent(file))) { |
e76b8764 | 1622 | |
911324ef DL |
1623 | if (!rootfs->path) { |
1624 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1625 | goto out; |
911324ef | 1626 | continue; |
e76b8764 CDC |
1627 | } |
1628 | ||
911324ef DL |
1629 | /* We have a separate root, mounts are relative to it */ |
1630 | if (mntent->mnt_dir[0] != '/') { | |
1631 | if (mount_entry_on_relative_rootfs(mntent, | |
1632 | rootfs->mount)) | |
1633 | goto out; | |
1634 | continue; | |
1635 | } | |
cd54d859 | 1636 | |
80a881b2 | 1637 | if (mount_entry_on_absolute_rootfs(mntent, rootfs, lxc_name)) |
911324ef | 1638 | goto out; |
0ad19a3f | 1639 | } |
cd54d859 | 1640 | |
0ad19a3f | 1641 | ret = 0; |
cd54d859 DL |
1642 | |
1643 | INFO("mount points have been setup"); | |
0ad19a3f | 1644 | out: |
e7938e9e MN |
1645 | return ret; |
1646 | } | |
1647 | ||
80a881b2 SH |
1648 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab, |
1649 | const char *lxc_name) | |
e7938e9e MN |
1650 | { |
1651 | FILE *file; | |
1652 | int ret; | |
1653 | ||
1654 | if (!fstab) | |
1655 | return 0; | |
1656 | ||
1657 | file = setmntent(fstab, "r"); | |
1658 | if (!file) { | |
1659 | SYSERROR("failed to use '%s'", fstab); | |
1660 | return -1; | |
1661 | } | |
1662 | ||
80a881b2 | 1663 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e | 1664 | |
0ad19a3f | 1665 | endmntent(file); |
1666 | return ret; | |
1667 | } | |
1668 | ||
80a881b2 SH |
1669 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount, |
1670 | const char *lxc_name) | |
e7938e9e MN |
1671 | { |
1672 | FILE *file; | |
1673 | struct lxc_list *iterator; | |
1674 | char *mount_entry; | |
1675 | int ret; | |
1676 | ||
1677 | file = tmpfile(); | |
1678 | if (!file) { | |
1679 | ERROR("tmpfile error: %m"); | |
1680 | return -1; | |
1681 | } | |
1682 | ||
1683 | lxc_list_for_each(iterator, mount) { | |
1684 | mount_entry = iterator->elem; | |
1d6b1976 | 1685 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1686 | } |
1687 | ||
1688 | rewind(file); | |
1689 | ||
80a881b2 | 1690 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e MN |
1691 | |
1692 | fclose(file); | |
1693 | return ret; | |
1694 | } | |
1695 | ||
81810dd1 DL |
1696 | static int setup_caps(struct lxc_list *caps) |
1697 | { | |
1698 | struct lxc_list *iterator; | |
1699 | char *drop_entry; | |
d55bc1ad | 1700 | char *ptr; |
81810dd1 DL |
1701 | int i, capid; |
1702 | ||
1703 | lxc_list_for_each(iterator, caps) { | |
1704 | ||
1705 | drop_entry = iterator->elem; | |
1706 | ||
1707 | capid = -1; | |
1708 | ||
1709 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1710 | ||
1711 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1712 | continue; | |
1713 | ||
1714 | capid = caps_opt[i].value; | |
1715 | break; | |
1716 | } | |
1717 | ||
d55bc1ad CS |
1718 | if (capid < 0) { |
1719 | /* try to see if it's numeric, so the user may specify | |
1720 | * capabilities that the running kernel knows about but | |
1721 | * we don't */ | |
1722 | capid = strtol(drop_entry, &ptr, 10); | |
1723 | if (!ptr || *ptr != '\0' || | |
1724 | capid == LONG_MIN || capid == LONG_MAX) | |
1725 | /* not a valid number */ | |
1726 | capid = -1; | |
1727 | else if (capid > lxc_caps_last_cap()) | |
1728 | /* we have a number but it's not a valid | |
1729 | * capability */ | |
1730 | capid = -1; | |
1731 | } | |
1732 | ||
81810dd1 | 1733 | if (capid < 0) { |
1e11be34 DL |
1734 | ERROR("unknown capability %s", drop_entry); |
1735 | return -1; | |
81810dd1 DL |
1736 | } |
1737 | ||
1738 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1739 | ||
1740 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1741 | SYSERROR("failed to remove %s capability", drop_entry); | |
1742 | return -1; | |
1743 | } | |
1744 | ||
1745 | } | |
1746 | ||
1747 | DEBUG("capabilities has been setup"); | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
0ad19a3f | 1752 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1753 | { | |
1754 | struct sockaddr sockaddr; | |
1755 | struct ifreq ifr; | |
1756 | int ret, fd; | |
1757 | ||
3cfc0f3a MN |
1758 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1759 | if (ret) { | |
1760 | ERROR("mac address '%s' conversion failed : %s", | |
1761 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1762 | return -1; |
1763 | } | |
1764 | ||
1765 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1766 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1767 | ||
1768 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1769 | if (fd < 0) { | |
3ab87b66 | 1770 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1771 | return -1; |
1772 | } | |
1773 | ||
1774 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1775 | close(fd); | |
1776 | if (ret) | |
3ab87b66 | 1777 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1778 | |
cd54d859 DL |
1779 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1780 | ||
0ad19a3f | 1781 | return ret; |
1782 | } | |
1783 | ||
82d5ae15 | 1784 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1785 | { |
82d5ae15 DL |
1786 | struct lxc_list *iterator; |
1787 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1788 | int err; |
0ad19a3f | 1789 | |
82d5ae15 DL |
1790 | lxc_list_for_each(iterator, ip) { |
1791 | ||
1792 | inetdev = iterator->elem; | |
1793 | ||
0093bb8c DL |
1794 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1795 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1796 | if (err) { |
1797 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1798 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1799 | return -1; |
1800 | } | |
1801 | } | |
1802 | ||
1803 | return 0; | |
0ad19a3f | 1804 | } |
1805 | ||
82d5ae15 | 1806 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1807 | { |
82d5ae15 | 1808 | struct lxc_list *iterator; |
7fa9074f | 1809 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1810 | int err; |
0ad19a3f | 1811 | |
82d5ae15 DL |
1812 | lxc_list_for_each(iterator, ip) { |
1813 | ||
1814 | inet6dev = iterator->elem; | |
1815 | ||
b3df193c | 1816 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1817 | &inet6dev->mcast, &inet6dev->acast, |
1818 | inet6dev->prefix); | |
3cfc0f3a MN |
1819 | if (err) { |
1820 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1821 | ifindex, strerror(-err)); | |
82d5ae15 | 1822 | return -1; |
3cfc0f3a | 1823 | } |
82d5ae15 DL |
1824 | } |
1825 | ||
1826 | return 0; | |
0ad19a3f | 1827 | } |
1828 | ||
82d5ae15 | 1829 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1830 | { |
0ad19a3f | 1831 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1832 | char *current_ifname = ifname; |
3cfc0f3a | 1833 | int err; |
0ad19a3f | 1834 | |
82d5ae15 DL |
1835 | /* empty network namespace */ |
1836 | if (!netdev->ifindex) { | |
b0efbac4 | 1837 | if (netdev->flags & IFF_UP) { |
d472214b | 1838 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1839 | if (err) { |
1840 | ERROR("failed to set the loopback up : %s", | |
1841 | strerror(-err)); | |
82d5ae15 DL |
1842 | return -1; |
1843 | } | |
82d5ae15 | 1844 | } |
7b57e8b6 | 1845 | return 0; |
0ad19a3f | 1846 | } |
13954cce | 1847 | |
82d5ae15 DL |
1848 | /* retrieve the name of the interface */ |
1849 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1850 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1851 | netdev->ifindex); |
0ad19a3f | 1852 | return -1; |
1853 | } | |
13954cce | 1854 | |
018ef520 | 1855 | /* default: let the system to choose one interface name */ |
9d083402 | 1856 | if (!netdev->name) |
fb6d9b2f DL |
1857 | netdev->name = netdev->type == LXC_NET_PHYS ? |
1858 | netdev->link : "eth%d"; | |
018ef520 | 1859 | |
82d5ae15 | 1860 | /* rename the interface name */ |
b84f58b9 | 1861 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
1862 | if (err) { |
1863 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1864 | strerror(-err)); | |
018ef520 DL |
1865 | return -1; |
1866 | } | |
1867 | ||
1868 | /* Re-read the name of the interface because its name has changed | |
1869 | * and would be automatically allocated by the system | |
1870 | */ | |
82d5ae15 | 1871 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1872 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1873 | netdev->ifindex); |
018ef520 | 1874 | return -1; |
0ad19a3f | 1875 | } |
1876 | ||
82d5ae15 DL |
1877 | /* set a mac address */ |
1878 | if (netdev->hwaddr) { | |
1879 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1880 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1881 | current_ifname); |
0ad19a3f | 1882 | return -1; |
1883 | } | |
1884 | } | |
1885 | ||
82d5ae15 DL |
1886 | /* setup ipv4 addresses on the interface */ |
1887 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1888 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1889 | ifname); |
1890 | return -1; | |
1891 | } | |
1892 | ||
82d5ae15 DL |
1893 | /* setup ipv6 addresses on the interface */ |
1894 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1895 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1896 | ifname); |
1897 | return -1; | |
1898 | } | |
1899 | ||
82d5ae15 | 1900 | /* set the network device up */ |
b0efbac4 | 1901 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1902 | int err; |
1903 | ||
d472214b | 1904 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
1905 | if (err) { |
1906 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1907 | strerror(-err)); | |
0ad19a3f | 1908 | return -1; |
1909 | } | |
1910 | ||
1911 | /* the network is up, make the loopback up too */ | |
d472214b | 1912 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1913 | if (err) { |
1914 | ERROR("failed to set the loopback up : %s", | |
1915 | strerror(-err)); | |
0ad19a3f | 1916 | return -1; |
1917 | } | |
1918 | } | |
1919 | ||
f8fee0e2 MK |
1920 | /* We can only set up the default routes after bringing |
1921 | * up the interface, sine bringing up the interface adds | |
1922 | * the link-local routes and we can't add a default | |
1923 | * route if the gateway is not reachable. */ | |
1924 | ||
1925 | /* setup ipv4 gateway on the interface */ | |
1926 | if (netdev->ipv4_gateway) { | |
1927 | if (!(netdev->flags & IFF_UP)) { | |
1928 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
1929 | return -1; | |
1930 | } | |
1931 | ||
1932 | if (lxc_list_empty(&netdev->ipv4)) { | |
1933 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
1934 | return -1; | |
1935 | } | |
1936 | ||
1937 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
1938 | if (err) { | |
1939 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
1940 | ifname, strerror(-err)); | |
19a26f82 MK |
1941 | if (netdev->ipv4_gateway_auto) { |
1942 | char buf[INET_ADDRSTRLEN]; | |
1943 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
1944 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
1945 | } | |
f8fee0e2 MK |
1946 | return -1; |
1947 | } | |
1948 | } | |
1949 | ||
1950 | /* setup ipv6 gateway on the interface */ | |
1951 | if (netdev->ipv6_gateway) { | |
1952 | if (!(netdev->flags & IFF_UP)) { | |
1953 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
1954 | return -1; | |
1955 | } | |
1956 | ||
1957 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
1958 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
1959 | return -1; | |
1960 | } | |
1961 | ||
1962 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
1963 | if (err) { | |
1964 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
1965 | ifname, strerror(-err)); | |
19a26f82 MK |
1966 | if (netdev->ipv6_gateway_auto) { |
1967 | char buf[INET6_ADDRSTRLEN]; | |
72d0e1cb | 1968 | inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); |
19a26f82 MK |
1969 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); |
1970 | } | |
f8fee0e2 MK |
1971 | return -1; |
1972 | } | |
1973 | } | |
1974 | ||
cd54d859 DL |
1975 | DEBUG("'%s' has been setup", current_ifname); |
1976 | ||
0ad19a3f | 1977 | return 0; |
1978 | } | |
1979 | ||
5f4535a3 | 1980 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1981 | { |
82d5ae15 | 1982 | struct lxc_list *iterator; |
82d5ae15 | 1983 | struct lxc_netdev *netdev; |
0ad19a3f | 1984 | |
5f4535a3 | 1985 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1986 | |
5f4535a3 | 1987 | netdev = iterator->elem; |
82d5ae15 DL |
1988 | |
1989 | if (setup_netdev(netdev)) { | |
1990 | ERROR("failed to setup netdev"); | |
1991 | return -1; | |
1992 | } | |
1993 | } | |
cd54d859 | 1994 | |
5f4535a3 DL |
1995 | if (!lxc_list_empty(network)) |
1996 | INFO("network has been setup"); | |
cd54d859 DL |
1997 | |
1998 | return 0; | |
0ad19a3f | 1999 | } |
2000 | ||
7b35f3d6 SH |
2001 | void lxc_rename_phys_nics_on_shutdown(struct lxc_conf *conf) |
2002 | { | |
2003 | int i; | |
2004 | ||
2005 | INFO("running to reset %d nic names", conf->num_savednics); | |
2006 | for (i=0; i<conf->num_savednics; i++) { | |
2007 | struct saved_nic *s = &conf->saved_nics[i]; | |
2008 | INFO("resetting nic %d to %s\n", s->ifindex, s->orig_name); | |
2009 | lxc_netdev_rename_by_index(s->ifindex, s->orig_name); | |
2010 | free(s->orig_name); | |
2011 | } | |
2012 | conf->num_savednics = 0; | |
2013 | free(conf->saved_nics); | |
2014 | } | |
2015 | ||
49684c0b CS |
2016 | static int setup_private_host_hw_addr(char *veth1) |
2017 | { | |
2018 | struct ifreq ifr; | |
2019 | int err; | |
2020 | int sockfd; | |
2021 | ||
2022 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
2023 | if (sockfd < 0) | |
2024 | return -errno; | |
2025 | ||
2026 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
2027 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
2028 | if (err < 0) { | |
2029 | close(sockfd); | |
2030 | return -errno; | |
2031 | } | |
2032 | ||
2033 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2034 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
2035 | close(sockfd); | |
2036 | if (err < 0) | |
2037 | return -errno; | |
2038 | ||
7ad84da7 DL |
2039 | DEBUG("mac address of host interface '%s' changed to private " |
2040 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
2041 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
2042 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
2043 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
2044 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
2045 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
2046 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
2047 | |
2048 | return 0; | |
2049 | } | |
2050 | ||
ae9242c8 SH |
2051 | static char *default_rootfs_mount = LXCROOTFSMOUNT; |
2052 | ||
7b379ab3 | 2053 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 2054 | { |
7b379ab3 | 2055 | struct lxc_conf *new; |
26ddeedd | 2056 | int i; |
7b379ab3 MN |
2057 | |
2058 | new = malloc(sizeof(*new)); | |
2059 | if (!new) { | |
2060 | ERROR("lxc_conf_init : %m"); | |
2061 | return NULL; | |
2062 | } | |
2063 | memset(new, 0, sizeof(*new)); | |
2064 | ||
cccc74b5 | 2065 | new->personality = -1; |
596a818d DE |
2066 | new->console.log_path = NULL; |
2067 | new->console.log_fd = -1; | |
28a4b0e5 | 2068 | new->console.path = NULL; |
63376d7d DL |
2069 | new->console.peer = -1; |
2070 | new->console.master = -1; | |
2071 | new->console.slave = -1; | |
2072 | new->console.name[0] = '\0'; | |
d2e30e99 | 2073 | new->maincmd_fd = -1; |
ae9242c8 | 2074 | new->rootfs.mount = default_rootfs_mount; |
4a85ce2a | 2075 | new->loglevel = LXC_LOG_PRIORITY_NOTSET; |
7b379ab3 MN |
2076 | lxc_list_init(&new->cgroup); |
2077 | lxc_list_init(&new->network); | |
2078 | lxc_list_init(&new->mount_list); | |
81810dd1 | 2079 | lxc_list_init(&new->caps); |
26ddeedd SH |
2080 | for (i=0; i<NUM_LXC_HOOKS; i++) |
2081 | lxc_list_init(&new->hooks[i]); | |
e075f5d9 SH |
2082 | #if HAVE_APPARMOR |
2083 | new->aa_profile = NULL; | |
2084 | #endif | |
2085 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ | |
2086 | new->lsm_umount_proc = 0; | |
2087 | #endif | |
7b379ab3 MN |
2088 | |
2089 | return new; | |
089cd8b8 DL |
2090 | } |
2091 | ||
e3b4c4c4 | 2092 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2093 | { |
8634bc19 | 2094 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 2095 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 2096 | int err; |
13954cce | 2097 | |
e892973e DL |
2098 | if (netdev->priv.veth_attr.pair) |
2099 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 | 2100 | else { |
9ba8130c SH |
2101 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); |
2102 | if (err >= sizeof(veth1buf)) { /* can't *really* happen, but... */ | |
2103 | ERROR("veth1 name too long"); | |
2104 | return -1; | |
2105 | } | |
0e391e57 | 2106 | veth1 = mktemp(veth1buf); |
74a2b586 JK |
2107 | /* store away for deconf */ |
2108 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
8634bc19 | 2109 | } |
82d5ae15 | 2110 | |
0e391e57 DL |
2111 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
2112 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
2113 | |
2114 | if (!strlen(veth1) || !strlen(veth2)) { | |
2115 | ERROR("failed to allocate a temporary name"); | |
2116 | return -1; | |
0ad19a3f | 2117 | } |
2118 | ||
3cfc0f3a MN |
2119 | err = lxc_veth_create(veth1, veth2); |
2120 | if (err) { | |
2121 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
2122 | strerror(-err)); | |
6ab9ab6d | 2123 | return -1; |
0ad19a3f | 2124 | } |
13954cce | 2125 | |
49684c0b CS |
2126 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
2127 | * will always keep the host's mac address and not take the mac address | |
2128 | * of a container */ | |
2129 | err = setup_private_host_hw_addr(veth1); | |
2130 | if (err) { | |
2131 | ERROR("failed to change mac address of host interface '%s' : %s", | |
2132 | veth1, strerror(-err)); | |
2133 | goto out_delete; | |
2134 | } | |
2135 | ||
82d5ae15 | 2136 | if (netdev->mtu) { |
d472214b | 2137 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 2138 | if (!err) |
d472214b | 2139 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
2140 | if (err) { |
2141 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
2142 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 2143 | goto out_delete; |
75d09f83 DL |
2144 | } |
2145 | } | |
2146 | ||
3cfc0f3a MN |
2147 | if (netdev->link) { |
2148 | err = lxc_bridge_attach(netdev->link, veth1); | |
2149 | if (err) { | |
2150 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
2151 | veth1, netdev->link, strerror(-err)); | |
2152 | goto out_delete; | |
2153 | } | |
eb14c10a DL |
2154 | } |
2155 | ||
82d5ae15 DL |
2156 | netdev->ifindex = if_nametoindex(veth2); |
2157 | if (!netdev->ifindex) { | |
36eb9bde | 2158 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
2159 | goto out_delete; |
2160 | } | |
2161 | ||
d472214b | 2162 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
2163 | if (err) { |
2164 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
2165 | goto out_delete; | |
0ad19a3f | 2166 | } |
2167 | ||
e3b4c4c4 | 2168 | if (netdev->upscript) { |
751d9dcd DL |
2169 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2170 | "veth", veth1, (char*) NULL); | |
2171 | if (err) | |
e3b4c4c4 | 2172 | goto out_delete; |
e3b4c4c4 ST |
2173 | } |
2174 | ||
82d5ae15 DL |
2175 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
2176 | veth1, veth2, netdev->ifindex); | |
2177 | ||
6ab9ab6d | 2178 | return 0; |
eb14c10a DL |
2179 | |
2180 | out_delete: | |
b84f58b9 | 2181 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 2182 | return -1; |
13954cce | 2183 | } |
d957ae2d | 2184 | |
74a2b586 JK |
2185 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2186 | { | |
2187 | char *veth1; | |
2188 | int err; | |
2189 | ||
2190 | if (netdev->priv.veth_attr.pair) | |
2191 | veth1 = netdev->priv.veth_attr.pair; | |
2192 | else | |
2193 | veth1 = netdev->priv.veth_attr.veth1; | |
2194 | ||
2195 | if (netdev->downscript) { | |
2196 | err = run_script(handler->name, "net", netdev->downscript, | |
2197 | "down", "veth", veth1, (char*) NULL); | |
2198 | if (err) | |
2199 | return -1; | |
2200 | } | |
2201 | return 0; | |
2202 | } | |
2203 | ||
e3b4c4c4 | 2204 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2205 | { |
0e391e57 | 2206 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 2207 | int err; |
d957ae2d MT |
2208 | |
2209 | if (!netdev->link) { | |
2210 | ERROR("no link specified for macvlan netdev"); | |
2211 | return -1; | |
2212 | } | |
13954cce | 2213 | |
9ba8130c SH |
2214 | err = snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
2215 | if (err >= sizeof(peerbuf)) | |
2216 | return -1; | |
82d5ae15 | 2217 | |
0e391e57 | 2218 | peer = mktemp(peerbuf); |
82d5ae15 DL |
2219 | if (!strlen(peer)) { |
2220 | ERROR("failed to make a temporary name"); | |
2221 | return -1; | |
0ad19a3f | 2222 | } |
2223 | ||
3cfc0f3a MN |
2224 | err = lxc_macvlan_create(netdev->link, peer, |
2225 | netdev->priv.macvlan_attr.mode); | |
2226 | if (err) { | |
2227 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
2228 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 2229 | return -1; |
0ad19a3f | 2230 | } |
2231 | ||
82d5ae15 DL |
2232 | netdev->ifindex = if_nametoindex(peer); |
2233 | if (!netdev->ifindex) { | |
36eb9bde | 2234 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 2235 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 2236 | return -1; |
22ebac19 | 2237 | } |
2238 | ||
e3b4c4c4 | 2239 | if (netdev->upscript) { |
751d9dcd DL |
2240 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2241 | "macvlan", netdev->link, (char*) NULL); | |
2242 | if (err) | |
e3b4c4c4 | 2243 | return -1; |
e3b4c4c4 ST |
2244 | } |
2245 | ||
e892973e DL |
2246 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
2247 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 2248 | |
d957ae2d | 2249 | return 0; |
0ad19a3f | 2250 | } |
2251 | ||
74a2b586 JK |
2252 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2253 | { | |
2254 | int err; | |
2255 | ||
2256 | if (netdev->downscript) { | |
2257 | err = run_script(handler->name, "net", netdev->downscript, | |
2258 | "down", "macvlan", netdev->link, | |
2259 | (char*) NULL); | |
2260 | if (err) | |
2261 | return -1; | |
2262 | } | |
2263 | return 0; | |
2264 | } | |
2265 | ||
26c39028 | 2266 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 2267 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
2268 | { |
2269 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 2270 | int err; |
26c39028 JHS |
2271 | |
2272 | if (!netdev->link) { | |
2273 | ERROR("no link specified for vlan netdev"); | |
2274 | return -1; | |
2275 | } | |
2276 | ||
9ba8130c SH |
2277 | err = snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
2278 | if (err >= sizeof(peer)) { | |
2279 | ERROR("peer name too long"); | |
2280 | return -1; | |
2281 | } | |
26c39028 | 2282 | |
3cfc0f3a MN |
2283 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
2284 | if (err) { | |
2285 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
2286 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
2287 | return -1; |
2288 | } | |
2289 | ||
2290 | netdev->ifindex = if_nametoindex(peer); | |
2291 | if (!netdev->ifindex) { | |
2292 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 2293 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
2294 | return -1; |
2295 | } | |
2296 | ||
e892973e DL |
2297 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
2298 | netdev->ifindex); | |
2299 | ||
26c39028 JHS |
2300 | return 0; |
2301 | } | |
2302 | ||
74a2b586 JK |
2303 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2304 | { | |
2305 | return 0; | |
2306 | } | |
2307 | ||
e3b4c4c4 | 2308 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2309 | { |
6168e99f DL |
2310 | if (!netdev->link) { |
2311 | ERROR("no link specified for the physical interface"); | |
2312 | return -1; | |
2313 | } | |
2314 | ||
9d083402 | 2315 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 2316 | if (!netdev->ifindex) { |
9d083402 | 2317 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 2318 | return -1; |
2319 | } | |
2320 | ||
e3b4c4c4 ST |
2321 | if (netdev->upscript) { |
2322 | int err; | |
751d9dcd DL |
2323 | err = run_script(handler->name, "net", netdev->upscript, |
2324 | "up", "phys", netdev->link, (char*) NULL); | |
2325 | if (err) | |
e3b4c4c4 | 2326 | return -1; |
e3b4c4c4 ST |
2327 | } |
2328 | ||
82d5ae15 | 2329 | return 0; |
0ad19a3f | 2330 | } |
2331 | ||
74a2b586 JK |
2332 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2333 | { | |
2334 | int err; | |
2335 | ||
2336 | if (netdev->downscript) { | |
2337 | err = run_script(handler->name, "net", netdev->downscript, | |
2338 | "down", "phys", netdev->link, (char*) NULL); | |
2339 | if (err) | |
2340 | return -1; | |
2341 | } | |
2342 | return 0; | |
2343 | } | |
2344 | ||
e3b4c4c4 | 2345 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2346 | { |
82d5ae15 | 2347 | netdev->ifindex = 0; |
e3b4c4c4 ST |
2348 | if (netdev->upscript) { |
2349 | int err; | |
751d9dcd DL |
2350 | err = run_script(handler->name, "net", netdev->upscript, |
2351 | "up", "empty", (char*) NULL); | |
2352 | if (err) | |
e3b4c4c4 | 2353 | return -1; |
e3b4c4c4 | 2354 | } |
82d5ae15 | 2355 | return 0; |
0ad19a3f | 2356 | } |
2357 | ||
74a2b586 JK |
2358 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2359 | { | |
2360 | int err; | |
2361 | ||
2362 | if (netdev->downscript) { | |
2363 | err = run_script(handler->name, "net", netdev->downscript, | |
2364 | "down", "empty", (char*) NULL); | |
2365 | if (err) | |
2366 | return -1; | |
2367 | } | |
2368 | return 0; | |
2369 | } | |
2370 | ||
e3b4c4c4 | 2371 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 2372 | { |
e3b4c4c4 | 2373 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 2374 | struct lxc_list *iterator; |
82d5ae15 | 2375 | struct lxc_netdev *netdev; |
0ad19a3f | 2376 | |
5f4535a3 | 2377 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 2378 | |
5f4535a3 | 2379 | netdev = iterator->elem; |
13954cce | 2380 | |
24654103 | 2381 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 2382 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 2383 | netdev->type); |
82d5ae15 DL |
2384 | return -1; |
2385 | } | |
0ad19a3f | 2386 | |
e3b4c4c4 | 2387 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
2388 | ERROR("failed to create netdev"); |
2389 | return -1; | |
2390 | } | |
e3b4c4c4 | 2391 | |
0ad19a3f | 2392 | } |
2393 | ||
2394 | return 0; | |
2395 | } | |
2396 | ||
74a2b586 | 2397 | void lxc_delete_network(struct lxc_handler *handler) |
7fef7a06 | 2398 | { |
74a2b586 | 2399 | struct lxc_list *network = &handler->conf->network; |
7fef7a06 DL |
2400 | struct lxc_list *iterator; |
2401 | struct lxc_netdev *netdev; | |
2402 | ||
2403 | lxc_list_for_each(iterator, network) { | |
2404 | netdev = iterator->elem; | |
d472214b | 2405 | |
74a2b586 | 2406 | if (netdev->ifindex != 0 && netdev->type == LXC_NET_PHYS) { |
d8f8e352 DL |
2407 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) |
2408 | WARN("failed to rename to the initial name the " \ | |
2409 | "netdev '%s'", netdev->link); | |
d472214b | 2410 | continue; |
d8f8e352 | 2411 | } |
d472214b | 2412 | |
74a2b586 JK |
2413 | if (netdev_deconf[netdev->type](handler, netdev)) { |
2414 | WARN("failed to destroy netdev"); | |
2415 | } | |
2416 | ||
d8f8e352 DL |
2417 | /* Recent kernel remove the virtual interfaces when the network |
2418 | * namespace is destroyed but in case we did not moved the | |
2419 | * interface to the network namespace, we have to destroy it | |
2420 | */ | |
74a2b586 JK |
2421 | if (netdev->ifindex != 0 && |
2422 | lxc_netdev_delete_by_index(netdev->ifindex)) | |
d8f8e352 | 2423 | WARN("failed to remove interface '%s'", netdev->name); |
7fef7a06 DL |
2424 | } |
2425 | } | |
2426 | ||
5f4535a3 | 2427 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 2428 | { |
82d5ae15 | 2429 | struct lxc_list *iterator; |
82d5ae15 | 2430 | struct lxc_netdev *netdev; |
3cfc0f3a | 2431 | int err; |
0ad19a3f | 2432 | |
5f4535a3 | 2433 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 2434 | |
5f4535a3 | 2435 | netdev = iterator->elem; |
82d5ae15 | 2436 | |
236087a6 DL |
2437 | /* empty network namespace, nothing to move */ |
2438 | if (!netdev->ifindex) | |
2439 | continue; | |
2440 | ||
d472214b | 2441 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
2442 | if (err) { |
2443 | ERROR("failed to move '%s' to the container : %s", | |
2444 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
2445 | return -1; |
2446 | } | |
2447 | ||
c1c75c04 | 2448 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 2449 | } |
2450 | ||
2451 | return 0; | |
2452 | } | |
2453 | ||
19a26f82 MK |
2454 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
2455 | { | |
2456 | struct lxc_list *network = &handler->conf->network; | |
2457 | struct lxc_list *iterator; | |
2458 | struct lxc_netdev *netdev; | |
2459 | int link_index; | |
2460 | ||
2461 | lxc_list_for_each(iterator, network) { | |
2462 | netdev = iterator->elem; | |
2463 | ||
2464 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2465 | continue; | |
2466 | ||
2467 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
2468 | ERROR("gateway = auto only supported for " | |
2469 | "veth and macvlan"); | |
2470 | return -1; | |
2471 | } | |
2472 | ||
2473 | if (!netdev->link) { | |
2474 | ERROR("gateway = auto needs a link interface"); | |
2475 | return -1; | |
2476 | } | |
2477 | ||
2478 | link_index = if_nametoindex(netdev->link); | |
2479 | if (!link_index) | |
2480 | return -EINVAL; | |
2481 | ||
2482 | if (netdev->ipv4_gateway_auto) { | |
2483 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
2484 | ERROR("failed to automatically find ipv4 gateway " | |
2485 | "address from link interface '%s'", netdev->link); | |
2486 | return -1; | |
2487 | } | |
2488 | } | |
2489 | ||
2490 | if (netdev->ipv6_gateway_auto) { | |
2491 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
2492 | ERROR("failed to automatically find ipv6 gateway " | |
2493 | "address from link interface '%s'", netdev->link); | |
2494 | return -1; | |
2495 | } | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | return 0; | |
2500 | } | |
2501 | ||
5e4a62bf | 2502 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 2503 | { |
5e4a62bf | 2504 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 2505 | int i; |
b0a33c1e | 2506 | |
5e4a62bf DL |
2507 | /* no tty in the configuration */ |
2508 | if (!conf->tty) | |
b0a33c1e | 2509 | return 0; |
2510 | ||
13954cce | 2511 | tty_info->pty_info = |
e4e7d59d | 2512 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 2513 | if (!tty_info->pty_info) { |
36eb9bde | 2514 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 2515 | return -1; |
b0a33c1e | 2516 | } |
2517 | ||
985d15b1 | 2518 | for (i = 0; i < conf->tty; i++) { |
13954cce | 2519 | |
b0a33c1e | 2520 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
2521 | ||
13954cce | 2522 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 2523 | pty_info->name, NULL, NULL)) { |
36eb9bde | 2524 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
2525 | tty_info->nbtty = i; |
2526 | lxc_delete_tty(tty_info); | |
2527 | return -1; | |
b0a33c1e | 2528 | } |
2529 | ||
5332bb84 DL |
2530 | DEBUG("allocated pty '%s' (%d/%d)", |
2531 | pty_info->name, pty_info->master, pty_info->slave); | |
2532 | ||
b035ad62 MS |
2533 | /* Prevent leaking the file descriptors to the container */ |
2534 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
2535 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
2536 | ||
b0a33c1e | 2537 | pty_info->busy = 0; |
2538 | } | |
2539 | ||
985d15b1 | 2540 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
2541 | |
2542 | INFO("tty's configured"); | |
2543 | ||
985d15b1 | 2544 | return 0; |
b0a33c1e | 2545 | } |
2546 | ||
2547 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
2548 | { | |
2549 | int i; | |
2550 | ||
2551 | for (i = 0; i < tty_info->nbtty; i++) { | |
2552 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
2553 | ||
2554 | close(pty_info->master); | |
2555 | close(pty_info->slave); | |
2556 | } | |
2557 | ||
2558 | free(tty_info->pty_info); | |
2559 | tty_info->nbtty = 0; | |
2560 | } | |
2561 | ||
571e6ec8 | 2562 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 2563 | { |
e075f5d9 SH |
2564 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
2565 | int mounted; | |
2566 | #endif | |
2567 | ||
571e6ec8 | 2568 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 2569 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 2570 | return -1; |
0ad19a3f | 2571 | } |
2572 | ||
5f4535a3 | 2573 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 2574 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 2575 | return -1; |
0ad19a3f | 2576 | } |
2577 | ||
89eaa05e SH |
2578 | if (run_lxc_hooks(name, "pre-mount", lxc_conf)) { |
2579 | ERROR("failed to run pre-mount hooks for container '%s'.", name); | |
2580 | return -1; | |
2581 | } | |
5ea6163a | 2582 | |
cc28d0b0 | 2583 | if (setup_rootfs(lxc_conf)) { |
ac778708 | 2584 | ERROR("failed to setup rootfs for '%s'", name); |
95b5ffaf | 2585 | return -1; |
0ad19a3f | 2586 | } |
2587 | ||
c6883f38 | 2588 | if (lxc_conf->autodev) { |
91c3830e SH |
2589 | if (mount_autodev(lxc_conf->rootfs.mount)) { |
2590 | ERROR("failed to mount /dev in the container"); | |
c6883f38 SH |
2591 | return -1; |
2592 | } | |
2593 | } | |
2594 | ||
80a881b2 | 2595 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab, name)) { |
36eb9bde | 2596 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2597 | return -1; |
576f946d | 2598 | } |
2599 | ||
80a881b2 | 2600 | if (setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list, name)) { |
e7938e9e MN |
2601 | ERROR("failed to setup the mount entries for '%s'", name); |
2602 | return -1; | |
2603 | } | |
2604 | ||
773fb9ca SH |
2605 | if (run_lxc_hooks(name, "mount", lxc_conf)) { |
2606 | ERROR("failed to run mount hooks for container '%s'.", name); | |
2607 | return -1; | |
2608 | } | |
2609 | ||
91c3830e SH |
2610 | if (lxc_conf->autodev) { |
2611 | if (setup_autodev(lxc_conf->rootfs.mount)) { | |
2612 | ERROR("failed to populate /dev in the container"); | |
2613 | return -1; | |
2614 | } | |
2615 | } | |
2616 | ||
ac778708 DL |
2617 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
2618 | ERROR("failed to setup the cgroups for '%s'", name); | |
2619 | return -1; | |
2620 | } | |
2621 | ||
7c6ef2a2 | 2622 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2623 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2624 | return -1; |
6e590161 | 2625 | } |
2626 | ||
f62b3449 | 2627 | if (setup_kmsg(&lxc_conf->rootfs, &lxc_conf->console)) // don't fail |
1bd051a6 | 2628 | ERROR("failed to setup kmsg for '%s'", name); |
1bd051a6 | 2629 | |
7c6ef2a2 | 2630 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2631 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2632 | return -1; |
b0a33c1e | 2633 | } |
2634 | ||
e075f5d9 | 2635 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
9ac3ffb5 SG |
2636 | INFO("rootfs path is .%s., mount is .%s.", lxc_conf->rootfs.path, |
2637 | lxc_conf->rootfs.mount); | |
2638 | if (lxc_conf->rootfs.path == NULL || strlen(lxc_conf->rootfs.path) == 0) | |
2639 | mounted = 0; | |
2640 | else | |
2641 | mounted = lsm_mount_proc_if_needed(lxc_conf->rootfs.path, lxc_conf->rootfs.mount); | |
e075f5d9 SH |
2642 | if (mounted == -1) { |
2643 | SYSERROR("failed to mount /proc in the container."); | |
2644 | return -1; | |
2645 | } else if (mounted == 1) { | |
2646 | lxc_conf->lsm_umount_proc = 1; | |
2647 | } | |
2648 | #endif | |
2649 | ||
ac778708 | 2650 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2651 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2652 | return -1; |
ed502555 | 2653 | } |
2654 | ||
571e6ec8 | 2655 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2656 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2657 | return -1; |
3c26f34e | 2658 | } |
2659 | ||
cccc74b5 DL |
2660 | if (setup_personality(lxc_conf->personality)) { |
2661 | ERROR("failed to setup personality"); | |
2662 | return -1; | |
2663 | } | |
2664 | ||
81810dd1 DL |
2665 | if (setup_caps(&lxc_conf->caps)) { |
2666 | ERROR("failed to drop capabilities"); | |
2667 | return -1; | |
2668 | } | |
2669 | ||
cd54d859 DL |
2670 | NOTICE("'%s' is setup.", name); |
2671 | ||
0ad19a3f | 2672 | return 0; |
2673 | } | |
26ddeedd SH |
2674 | |
2675 | int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf) | |
2676 | { | |
2677 | int which = -1; | |
2678 | struct lxc_list *it; | |
2679 | ||
2680 | if (strcmp(hook, "pre-start") == 0) | |
2681 | which = LXCHOOK_PRESTART; | |
5ea6163a SH |
2682 | else if (strcmp(hook, "pre-mount") == 0) |
2683 | which = LXCHOOK_PREMOUNT; | |
26ddeedd SH |
2684 | else if (strcmp(hook, "mount") == 0) |
2685 | which = LXCHOOK_MOUNT; | |
2686 | else if (strcmp(hook, "start") == 0) | |
2687 | which = LXCHOOK_START; | |
2688 | else if (strcmp(hook, "post-stop") == 0) | |
2689 | which = LXCHOOK_POSTSTOP; | |
2690 | else | |
2691 | return -1; | |
2692 | lxc_list_for_each(it, &conf->hooks[which]) { | |
2693 | int ret; | |
2694 | char *hookname = it->elem; | |
2695 | ret = run_script(name, "lxc", hookname, hook, NULL); | |
2696 | if (ret) | |
2697 | return ret; | |
2698 | } | |
2699 | return 0; | |
2700 | } | |
72d0e1cb | 2701 | |
427b3a21 | 2702 | static void lxc_remove_nic(struct lxc_list *it) |
72d0e1cb SG |
2703 | { |
2704 | struct lxc_netdev *netdev = it->elem; | |
9ebb03ad | 2705 | struct lxc_list *it2,*next; |
72d0e1cb SG |
2706 | |
2707 | lxc_list_del(it); | |
2708 | ||
2709 | if (netdev->link) | |
2710 | free(netdev->link); | |
2711 | if (netdev->name) | |
2712 | free(netdev->name); | |
2713 | if (netdev->upscript) | |
2714 | free(netdev->upscript); | |
2715 | if (netdev->hwaddr) | |
2716 | free(netdev->hwaddr); | |
2717 | if (netdev->mtu) | |
2718 | free(netdev->mtu); | |
2719 | if (netdev->ipv4_gateway) | |
2720 | free(netdev->ipv4_gateway); | |
2721 | if (netdev->ipv6_gateway) | |
2722 | free(netdev->ipv6_gateway); | |
9ebb03ad | 2723 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { |
72d0e1cb SG |
2724 | lxc_list_del(it2); |
2725 | free(it2->elem); | |
2726 | free(it2); | |
2727 | } | |
9ebb03ad | 2728 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { |
72d0e1cb SG |
2729 | lxc_list_del(it2); |
2730 | free(it2->elem); | |
2731 | free(it2); | |
2732 | } | |
d95db067 | 2733 | free(netdev); |
72d0e1cb SG |
2734 | free(it); |
2735 | } | |
2736 | ||
2737 | /* we get passed in something like '0', '0.ipv4' or '1.ipv6' */ | |
12a50cc6 | 2738 | int lxc_clear_nic(struct lxc_conf *c, const char *key) |
72d0e1cb SG |
2739 | { |
2740 | char *p1; | |
2741 | int ret, idx, i; | |
2742 | struct lxc_list *it; | |
2743 | struct lxc_netdev *netdev; | |
2744 | ||
2745 | p1 = index(key, '.'); | |
2746 | if (!p1 || *(p1+1) == '\0') | |
2747 | p1 = NULL; | |
2748 | ||
2749 | ret = sscanf(key, "%d", &idx); | |
2750 | if (ret != 1) return -1; | |
2751 | if (idx < 0) | |
2752 | return -1; | |
2753 | ||
2754 | i = 0; | |
2755 | lxc_list_for_each(it, &c->network) { | |
2756 | if (i == idx) | |
2757 | break; | |
2758 | i++; | |
2759 | } | |
2760 | if (i < idx) // we don't have that many nics defined | |
2761 | return -1; | |
2762 | ||
2763 | if (!it || !it->elem) | |
2764 | return -1; | |
2765 | ||
2766 | netdev = it->elem; | |
2767 | ||
2768 | if (!p1) { | |
2769 | lxc_remove_nic(it); | |
2770 | } else if (strcmp(p1, "ipv4") == 0) { | |
9ebb03ad DE |
2771 | struct lxc_list *it2,*next; |
2772 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { | |
72d0e1cb SG |
2773 | lxc_list_del(it2); |
2774 | free(it2->elem); | |
2775 | free(it2); | |
2776 | } | |
2777 | } else if (strcmp(p1, "ipv6") == 0) { | |
9ebb03ad DE |
2778 | struct lxc_list *it2,*next; |
2779 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { | |
72d0e1cb SG |
2780 | lxc_list_del(it2); |
2781 | free(it2->elem); | |
2782 | free(it2); | |
2783 | } | |
2784 | } else if (strcmp(p1, "link") == 0) { | |
2785 | if (netdev->link) { | |
2786 | free(netdev->link); | |
2787 | netdev->link = NULL; | |
2788 | } | |
2789 | } else if (strcmp(p1, "name") == 0) { | |
2790 | if (netdev->name) { | |
2791 | free(netdev->name); | |
2792 | netdev->name = NULL; | |
2793 | } | |
2794 | } else if (strcmp(p1, "script.up") == 0) { | |
2795 | if (netdev->upscript) { | |
2796 | free(netdev->upscript); | |
2797 | netdev->upscript = NULL; | |
2798 | } | |
2799 | } else if (strcmp(p1, "hwaddr") == 0) { | |
2800 | if (netdev->hwaddr) { | |
2801 | free(netdev->hwaddr); | |
2802 | netdev->hwaddr = NULL; | |
2803 | } | |
2804 | } else if (strcmp(p1, "mtu") == 0) { | |
2805 | if (netdev->mtu) { | |
2806 | free(netdev->mtu); | |
2807 | netdev->mtu = NULL; | |
2808 | } | |
2809 | } else if (strcmp(p1, "ipv4_gateway") == 0) { | |
2810 | if (netdev->ipv4_gateway) { | |
2811 | free(netdev->ipv4_gateway); | |
2812 | netdev->ipv4_gateway = NULL; | |
2813 | } | |
2814 | } else if (strcmp(p1, "ipv6_gateway") == 0) { | |
2815 | if (netdev->ipv6_gateway) { | |
2816 | free(netdev->ipv6_gateway); | |
2817 | netdev->ipv6_gateway = NULL; | |
2818 | } | |
2819 | } | |
2820 | else return -1; | |
2821 | ||
2822 | return 0; | |
2823 | } | |
2824 | ||
2825 | int lxc_clear_config_network(struct lxc_conf *c) | |
2826 | { | |
9ebb03ad DE |
2827 | struct lxc_list *it,*next; |
2828 | lxc_list_for_each_safe(it, &c->network, next) { | |
72d0e1cb SG |
2829 | lxc_remove_nic(it); |
2830 | } | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | int lxc_clear_config_caps(struct lxc_conf *c) | |
2835 | { | |
9ebb03ad | 2836 | struct lxc_list *it,*next; |
72d0e1cb | 2837 | |
9ebb03ad | 2838 | lxc_list_for_each_safe(it, &c->caps, next) { |
72d0e1cb SG |
2839 | lxc_list_del(it); |
2840 | free(it->elem); | |
2841 | free(it); | |
2842 | } | |
2843 | return 0; | |
2844 | } | |
2845 | ||
12a50cc6 | 2846 | int lxc_clear_cgroups(struct lxc_conf *c, const char *key) |
72d0e1cb | 2847 | { |
9ebb03ad | 2848 | struct lxc_list *it,*next; |
72d0e1cb | 2849 | bool all = false; |
12a50cc6 | 2850 | const char *k = key + 11; |
72d0e1cb SG |
2851 | |
2852 | if (strcmp(key, "lxc.cgroup") == 0) | |
2853 | all = true; | |
2854 | ||
9ebb03ad | 2855 | lxc_list_for_each_safe(it, &c->cgroup, next) { |
72d0e1cb SG |
2856 | struct lxc_cgroup *cg = it->elem; |
2857 | if (!all && strcmp(cg->subsystem, k) != 0) | |
2858 | continue; | |
2859 | lxc_list_del(it); | |
2860 | free(cg->subsystem); | |
2861 | free(cg->value); | |
2862 | free(cg); | |
2863 | free(it); | |
2864 | } | |
2865 | return 0; | |
2866 | } | |
2867 | ||
2868 | int lxc_clear_mount_entries(struct lxc_conf *c) | |
2869 | { | |
9ebb03ad | 2870 | struct lxc_list *it,*next; |
72d0e1cb | 2871 | |
9ebb03ad | 2872 | lxc_list_for_each_safe(it, &c->mount_list, next) { |
72d0e1cb SG |
2873 | lxc_list_del(it); |
2874 | free(it->elem); | |
2875 | free(it); | |
2876 | } | |
2877 | return 0; | |
2878 | } | |
2879 | ||
12a50cc6 | 2880 | int lxc_clear_hooks(struct lxc_conf *c, const char *key) |
72d0e1cb | 2881 | { |
9ebb03ad | 2882 | struct lxc_list *it,*next; |
17ed13a3 | 2883 | bool all = false, done = false; |
12a50cc6 | 2884 | const char *k = key + 9; |
72d0e1cb SG |
2885 | int i; |
2886 | ||
17ed13a3 SH |
2887 | if (strcmp(key, "lxc.hook") == 0) |
2888 | all = true; | |
2889 | ||
72d0e1cb | 2890 | for (i=0; i<NUM_LXC_HOOKS; i++) { |
17ed13a3 | 2891 | if (all || strcmp(k, lxchook_names[i]) == 0) { |
9ebb03ad | 2892 | lxc_list_for_each_safe(it, &c->hooks[i], next) { |
17ed13a3 SH |
2893 | lxc_list_del(it); |
2894 | free(it->elem); | |
2895 | free(it); | |
2896 | } | |
2897 | done = true; | |
72d0e1cb SG |
2898 | } |
2899 | } | |
17ed13a3 SH |
2900 | |
2901 | if (!done) { | |
2902 | ERROR("Invalid hook key: %s", key); | |
2903 | return -1; | |
2904 | } | |
72d0e1cb SG |
2905 | return 0; |
2906 | } | |
8eb5694b | 2907 | |
7b35f3d6 SH |
2908 | void lxc_clear_saved_nics(struct lxc_conf *conf) |
2909 | { | |
2910 | int i; | |
2911 | ||
2912 | if (!conf->num_savednics) | |
2913 | return; | |
2914 | for (i=0; i < conf->num_savednics; i++) | |
2915 | free(conf->saved_nics[i].orig_name); | |
2916 | conf->saved_nics = 0; | |
2917 | free(conf->saved_nics); | |
2918 | } | |
2919 | ||
8eb5694b SH |
2920 | void lxc_conf_free(struct lxc_conf *conf) |
2921 | { | |
2922 | if (!conf) | |
2923 | return; | |
2924 | if (conf->console.path) | |
2925 | free(conf->console.path); | |
ae9242c8 | 2926 | if (conf->rootfs.mount != default_rootfs_mount) |
8eb5694b | 2927 | free(conf->rootfs.mount); |
d95db067 DE |
2928 | if (conf->rootfs.path) |
2929 | free(conf->rootfs.path); | |
2930 | if (conf->utsname) | |
2931 | free(conf->utsname); | |
2932 | if (conf->ttydir) | |
2933 | free(conf->ttydir); | |
2934 | if (conf->fstab) | |
2935 | free(conf->fstab); | |
4a85ce2a SH |
2936 | if (conf->logfile) |
2937 | free(conf->logfile); | |
8eb5694b | 2938 | lxc_clear_config_network(conf); |
1f530df6 | 2939 | #if HAVE_APPARMOR |
8eb5694b SH |
2940 | if (conf->aa_profile) |
2941 | free(conf->aa_profile); | |
1f530df6 | 2942 | #endif |
769872f9 | 2943 | lxc_seccomp_free(conf); |
8eb5694b SH |
2944 | lxc_clear_config_caps(conf); |
2945 | lxc_clear_cgroups(conf, "lxc.cgroup"); | |
17ed13a3 | 2946 | lxc_clear_hooks(conf, "lxc.hook"); |
8eb5694b | 2947 | lxc_clear_mount_entries(conf); |
7b35f3d6 | 2948 | lxc_clear_saved_nics(conf); |
8eb5694b SH |
2949 | free(conf); |
2950 | } |