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Commit | Line | Data |
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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <dlezcano at fr.ibm.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #define _GNU_SOURCE | |
24 | #include <stdio.h> | |
25 | #undef _GNU_SOURCE | |
26 | #include <stdlib.h> | |
e3b4c4c4 | 27 | #include <stdarg.h> |
0ad19a3f | 28 | #include <errno.h> |
29 | #include <string.h> | |
30 | #include <dirent.h> | |
31 | #include <mntent.h> | |
32 | #include <unistd.h> | |
e3b4c4c4 | 33 | #include <sys/wait.h> |
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> |
cccc74b5 | 51 | #include <sys/personality.h> |
0ad19a3f | 52 | |
53 | #include <arpa/inet.h> | |
54 | #include <fcntl.h> | |
55 | #include <netinet/in.h> | |
56 | #include <net/if.h> | |
6f4a3756 | 57 | #include <libgen.h> |
0ad19a3f | 58 | |
e5bda9ee | 59 | #include "network.h" |
60 | #include "error.h" | |
b2718c72 | 61 | #include "parse.h" |
881450bb | 62 | #include "config.h" |
1b09f2c0 DL |
63 | #include "utils.h" |
64 | #include "conf.h" | |
65 | #include "log.h" | |
66 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
d55bc1ad | 67 | #include "caps.h" /* for lxc_caps_last_cap() */ |
36eb9bde | 68 | |
d0a36f2c SG |
69 | #if HAVE_APPARMOR |
70 | #include <apparmor.h> | |
71 | #endif | |
72 | ||
495d2046 SG |
73 | #if HAVE_SYS_CAPABILITY_H |
74 | #include <sys/capability.h> | |
75 | #endif | |
76 | ||
769872f9 SH |
77 | #include "lxcseccomp.h" |
78 | ||
36eb9bde | 79 | lxc_log_define(lxc_conf, lxc); |
e5bda9ee | 80 | |
0ad19a3f | 81 | #define MAXHWLEN 18 |
82 | #define MAXINDEXLEN 20 | |
442cbbe6 | 83 | #define MAXMTULEN 16 |
0ad19a3f | 84 | #define MAXLINELEN 128 |
85 | ||
968fbd36 SK |
86 | #ifndef MS_DIRSYNC |
87 | #define MS_DIRSYNC 128 | |
88 | #endif | |
89 | ||
fdc03323 DL |
90 | #ifndef MS_REC |
91 | #define MS_REC 16384 | |
92 | #endif | |
93 | ||
c08556c6 DL |
94 | #ifndef MNT_DETACH |
95 | #define MNT_DETACH 2 | |
96 | #endif | |
97 | ||
859a6da0 NC |
98 | #ifndef MS_SLAVE |
99 | #define MS_SLAVE (1<<19) | |
100 | #endif | |
101 | ||
88d413d5 SW |
102 | #ifndef MS_RELATIME |
103 | #define MS_RELATIME (1 << 21) | |
104 | #endif | |
105 | ||
106 | #ifndef MS_STRICTATIME | |
107 | #define MS_STRICTATIME (1 << 24) | |
108 | #endif | |
109 | ||
495d2046 | 110 | #if HAVE_SYS_CAPABILITY_H |
b09094da MN |
111 | #ifndef CAP_SETFCAP |
112 | #define CAP_SETFCAP 31 | |
113 | #endif | |
114 | ||
115 | #ifndef CAP_MAC_OVERRIDE | |
116 | #define CAP_MAC_OVERRIDE 32 | |
117 | #endif | |
118 | ||
119 | #ifndef CAP_MAC_ADMIN | |
120 | #define CAP_MAC_ADMIN 33 | |
121 | #endif | |
495d2046 | 122 | #endif |
b09094da MN |
123 | |
124 | #ifndef PR_CAPBSET_DROP | |
125 | #define PR_CAPBSET_DROP 24 | |
126 | #endif | |
127 | ||
9818cae4 SG |
128 | #ifndef LO_FLAGS_AUTOCLEAR |
129 | #define LO_FLAGS_AUTOCLEAR 4 | |
130 | #endif | |
131 | ||
72d0e1cb | 132 | char *lxchook_names[NUM_LXC_HOOKS] = { |
5ea6163a | 133 | "pre-start", "pre-mount", "mount", "start", "post-stop" }; |
72d0e1cb | 134 | |
bf601689 MH |
135 | extern int pivot_root(const char * new_root, const char * put_old); |
136 | ||
e3b4c4c4 | 137 | typedef int (*instanciate_cb)(struct lxc_handler *, struct lxc_netdev *); |
0ad19a3f | 138 | |
998ac676 RT |
139 | struct mount_opt { |
140 | char *name; | |
141 | int clear; | |
142 | int flag; | |
143 | }; | |
144 | ||
81810dd1 DL |
145 | struct caps_opt { |
146 | char *name; | |
147 | int value; | |
148 | }; | |
149 | ||
e3b4c4c4 ST |
150 | static int instanciate_veth(struct lxc_handler *, struct lxc_netdev *); |
151 | static int instanciate_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
152 | static int instanciate_vlan(struct lxc_handler *, struct lxc_netdev *); | |
153 | static int instanciate_phys(struct lxc_handler *, struct lxc_netdev *); | |
154 | static int instanciate_empty(struct lxc_handler *, struct lxc_netdev *); | |
82d5ae15 | 155 | |
24654103 DL |
156 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
157 | [LXC_NET_VETH] = instanciate_veth, | |
158 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
159 | [LXC_NET_VLAN] = instanciate_vlan, | |
160 | [LXC_NET_PHYS] = instanciate_phys, | |
161 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 162 | }; |
163 | ||
74a2b586 JK |
164 | static int shutdown_veth(struct lxc_handler *, struct lxc_netdev *); |
165 | static int shutdown_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
166 | static int shutdown_vlan(struct lxc_handler *, struct lxc_netdev *); | |
167 | static int shutdown_phys(struct lxc_handler *, struct lxc_netdev *); | |
168 | static int shutdown_empty(struct lxc_handler *, struct lxc_netdev *); | |
169 | ||
170 | static instanciate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
171 | [LXC_NET_VETH] = shutdown_veth, | |
172 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
173 | [LXC_NET_VLAN] = shutdown_vlan, | |
174 | [LXC_NET_PHYS] = shutdown_phys, | |
175 | [LXC_NET_EMPTY] = shutdown_empty, | |
176 | }; | |
177 | ||
998ac676 | 178 | static struct mount_opt mount_opt[] = { |
88d413d5 SW |
179 | { "defaults", 0, 0 }, |
180 | { "ro", 0, MS_RDONLY }, | |
181 | { "rw", 1, MS_RDONLY }, | |
182 | { "suid", 1, MS_NOSUID }, | |
183 | { "nosuid", 0, MS_NOSUID }, | |
184 | { "dev", 1, MS_NODEV }, | |
185 | { "nodev", 0, MS_NODEV }, | |
186 | { "exec", 1, MS_NOEXEC }, | |
187 | { "noexec", 0, MS_NOEXEC }, | |
188 | { "sync", 0, MS_SYNCHRONOUS }, | |
189 | { "async", 1, MS_SYNCHRONOUS }, | |
190 | { "dirsync", 0, MS_DIRSYNC }, | |
191 | { "remount", 0, MS_REMOUNT }, | |
192 | { "mand", 0, MS_MANDLOCK }, | |
193 | { "nomand", 1, MS_MANDLOCK }, | |
194 | { "atime", 1, MS_NOATIME }, | |
195 | { "noatime", 0, MS_NOATIME }, | |
196 | { "diratime", 1, MS_NODIRATIME }, | |
197 | { "nodiratime", 0, MS_NODIRATIME }, | |
198 | { "bind", 0, MS_BIND }, | |
199 | { "rbind", 0, MS_BIND|MS_REC }, | |
200 | { "relatime", 0, MS_RELATIME }, | |
201 | { "norelatime", 1, MS_RELATIME }, | |
202 | { "strictatime", 0, MS_STRICTATIME }, | |
203 | { "nostrictatime", 1, MS_STRICTATIME }, | |
204 | { NULL, 0, 0 }, | |
998ac676 RT |
205 | }; |
206 | ||
495d2046 | 207 | #if HAVE_SYS_CAPABILITY_H |
81810dd1 | 208 | static struct caps_opt caps_opt[] = { |
a6afdde9 | 209 | { "chown", CAP_CHOWN }, |
1e11be34 DL |
210 | { "dac_override", CAP_DAC_OVERRIDE }, |
211 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
212 | { "fowner", CAP_FOWNER }, | |
213 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
214 | { "kill", CAP_KILL }, |
215 | { "setgid", CAP_SETGID }, | |
216 | { "setuid", CAP_SETUID }, | |
217 | { "setpcap", CAP_SETPCAP }, | |
218 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
219 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
220 | { "net_broadcast", CAP_NET_BROADCAST }, | |
221 | { "net_admin", CAP_NET_ADMIN }, | |
222 | { "net_raw", CAP_NET_RAW }, | |
223 | { "ipc_lock", CAP_IPC_LOCK }, | |
224 | { "ipc_owner", CAP_IPC_OWNER }, | |
225 | { "sys_module", CAP_SYS_MODULE }, | |
226 | { "sys_rawio", CAP_SYS_RAWIO }, | |
227 | { "sys_chroot", CAP_SYS_CHROOT }, | |
228 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
229 | { "sys_pacct", CAP_SYS_PACCT }, | |
230 | { "sys_admin", CAP_SYS_ADMIN }, | |
231 | { "sys_boot", CAP_SYS_BOOT }, | |
232 | { "sys_nice", CAP_SYS_NICE }, | |
233 | { "sys_resource", CAP_SYS_RESOURCE }, | |
234 | { "sys_time", CAP_SYS_TIME }, | |
235 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
236 | { "mknod", CAP_MKNOD }, | |
237 | { "lease", CAP_LEASE }, | |
9527e566 | 238 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 239 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
240 | #endif |
241 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 242 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 243 | #endif |
81810dd1 DL |
244 | { "setfcap", CAP_SETFCAP }, |
245 | { "mac_override", CAP_MAC_OVERRIDE }, | |
246 | { "mac_admin", CAP_MAC_ADMIN }, | |
5170c716 CS |
247 | #ifdef CAP_SYSLOG |
248 | { "syslog", CAP_SYSLOG }, | |
249 | #endif | |
250 | #ifdef CAP_WAKE_ALARM | |
251 | { "wake_alarm", CAP_WAKE_ALARM }, | |
252 | #endif | |
81810dd1 | 253 | }; |
495d2046 SG |
254 | #else |
255 | static struct caps_opt caps_opt[] = {}; | |
256 | #endif | |
81810dd1 | 257 | |
91c3830e SH |
258 | static int run_buffer(char *buffer) |
259 | { | |
260 | FILE *f; | |
261 | char *output; | |
262 | ||
263 | f = popen(buffer, "r"); | |
264 | if (!f) { | |
265 | SYSERROR("popen failed"); | |
266 | return -1; | |
267 | } | |
268 | ||
269 | output = malloc(LXC_LOG_BUFFER_SIZE); | |
270 | if (!output) { | |
271 | ERROR("failed to allocate memory for script output"); | |
272 | return -1; | |
273 | } | |
274 | ||
275 | while(fgets(output, LXC_LOG_BUFFER_SIZE, f)) | |
276 | DEBUG("script output: %s", output); | |
277 | ||
278 | free(output); | |
279 | ||
280 | if (pclose(f) == -1) { | |
281 | SYSERROR("Script exited on error"); | |
282 | return -1; | |
283 | } | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
751d9dcd DL |
288 | static int run_script(const char *name, const char *section, |
289 | const char *script, ...) | |
e3b4c4c4 | 290 | { |
abbfd20b | 291 | int ret; |
91c3830e | 292 | char *buffer, *p; |
abbfd20b DL |
293 | size_t size = 0; |
294 | va_list ap; | |
751d9dcd DL |
295 | |
296 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
297 | script, name, section); | |
e3b4c4c4 | 298 | |
abbfd20b DL |
299 | va_start(ap, script); |
300 | while ((p = va_arg(ap, char *))) | |
95642a10 | 301 | size += strlen(p) + 1; |
abbfd20b DL |
302 | va_end(ap); |
303 | ||
304 | size += strlen(script); | |
305 | size += strlen(name); | |
306 | size += strlen(section); | |
95642a10 | 307 | size += 3; |
abbfd20b | 308 | |
95642a10 MS |
309 | if (size > INT_MAX) |
310 | return -1; | |
311 | ||
312 | buffer = alloca(size); | |
abbfd20b DL |
313 | if (!buffer) { |
314 | ERROR("failed to allocate memory"); | |
751d9dcd DL |
315 | return -1; |
316 | } | |
317 | ||
9ba8130c SH |
318 | ret = snprintf(buffer, size, "%s %s %s", script, name, section); |
319 | if (ret < 0 || ret >= size) { | |
320 | ERROR("Script name too long"); | |
321 | free(buffer); | |
322 | return -1; | |
323 | } | |
751d9dcd | 324 | |
abbfd20b | 325 | va_start(ap, script); |
9ba8130c SH |
326 | while ((p = va_arg(ap, char *))) { |
327 | int len = size-ret; | |
328 | int rc; | |
329 | rc = snprintf(buffer + ret, len, " %s", p); | |
330 | if (rc < 0 || rc >= len) { | |
331 | free(buffer); | |
332 | ERROR("Script args too long"); | |
333 | return -1; | |
334 | } | |
335 | ret += rc; | |
336 | } | |
abbfd20b | 337 | va_end(ap); |
751d9dcd | 338 | |
91c3830e | 339 | return run_buffer(buffer); |
e3b4c4c4 ST |
340 | } |
341 | ||
a6afdde9 | 342 | static int find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 343 | { |
344 | struct cbarg { | |
345 | const char *rootfs; | |
a6afdde9 | 346 | const char *target; |
78ae2fcc | 347 | int mntopt; |
348 | } *cbarg = data; | |
349 | ||
350 | char *fstype; | |
351 | ||
352 | /* we don't try 'nodev' entries */ | |
353 | if (strstr(buffer, "nodev")) | |
354 | return 0; | |
355 | ||
356 | fstype = buffer; | |
b2718c72 | 357 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
358 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 359 | |
a6afdde9 DL |
360 | DEBUG("trying to mount '%s'->'%s' with fstype '%s'", |
361 | cbarg->rootfs, cbarg->target, fstype); | |
362 | ||
363 | if (mount(cbarg->rootfs, cbarg->target, fstype, cbarg->mntopt, NULL)) { | |
364 | DEBUG("mount failed with error: %s", strerror(errno)); | |
78ae2fcc | 365 | return 0; |
a6afdde9 | 366 | } |
78ae2fcc | 367 | |
a6afdde9 DL |
368 | INFO("mounted '%s' on '%s', with fstype '%s'", |
369 | cbarg->rootfs, cbarg->target, fstype); | |
78ae2fcc | 370 | |
371 | return 1; | |
372 | } | |
373 | ||
2656d231 | 374 | static int mount_unknow_fs(const char *rootfs, const char *target, int mntopt) |
78ae2fcc | 375 | { |
a6afdde9 | 376 | int i; |
78ae2fcc | 377 | |
378 | struct cbarg { | |
379 | const char *rootfs; | |
a6afdde9 | 380 | const char *target; |
78ae2fcc | 381 | int mntopt; |
382 | } cbarg = { | |
383 | .rootfs = rootfs, | |
a6afdde9 | 384 | .target = target, |
78ae2fcc | 385 | .mntopt = mntopt, |
386 | }; | |
387 | ||
a6afdde9 DL |
388 | /* |
389 | * find the filesystem type with brute force: | |
390 | * first we check with /etc/filesystems, in case the modules | |
78ae2fcc | 391 | * are auto-loaded and fall back to the supported kernel fs |
392 | */ | |
393 | char *fsfile[] = { | |
394 | "/etc/filesystems", | |
395 | "/proc/filesystems", | |
396 | }; | |
397 | ||
a6afdde9 DL |
398 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { |
399 | ||
400 | int ret; | |
401 | ||
402 | if (access(fsfile[i], F_OK)) | |
403 | continue; | |
404 | ||
405 | ret = lxc_file_for_each_line(fsfile[i], find_fstype_cb, &cbarg); | |
406 | if (ret < 0) { | |
407 | ERROR("failed to parse '%s'", fsfile[i]); | |
408 | return -1; | |
409 | } | |
410 | ||
411 | if (ret) | |
412 | return 0; | |
78ae2fcc | 413 | } |
414 | ||
a6afdde9 DL |
415 | ERROR("failed to determine fs type for '%s'", rootfs); |
416 | return -1; | |
417 | } | |
418 | ||
2656d231 | 419 | static int mount_rootfs_dir(const char *rootfs, const char *target) |
a6afdde9 DL |
420 | { |
421 | return mount(rootfs, target, "none", MS_BIND | MS_REC, NULL); | |
422 | } | |
423 | ||
424 | static int setup_lodev(const char *rootfs, int fd, struct loop_info64 *loinfo) | |
425 | { | |
426 | int rfd; | |
427 | int ret = -1; | |
428 | ||
429 | rfd = open(rootfs, O_RDWR); | |
430 | if (rfd < 0) { | |
431 | SYSERROR("failed to open '%s'", rootfs); | |
78ae2fcc | 432 | return -1; |
433 | } | |
434 | ||
a6afdde9 | 435 | memset(loinfo, 0, sizeof(*loinfo)); |
78ae2fcc | 436 | |
a6afdde9 | 437 | loinfo->lo_flags = LO_FLAGS_AUTOCLEAR; |
78ae2fcc | 438 | |
a6afdde9 DL |
439 | if (ioctl(fd, LOOP_SET_FD, rfd)) { |
440 | SYSERROR("failed to LOOP_SET_FD"); | |
441 | goto out; | |
78ae2fcc | 442 | } |
443 | ||
a6afdde9 DL |
444 | if (ioctl(fd, LOOP_SET_STATUS64, loinfo)) { |
445 | SYSERROR("failed to LOOP_SET_STATUS64"); | |
78ae2fcc | 446 | goto out; |
447 | } | |
448 | ||
a6afdde9 | 449 | ret = 0; |
78ae2fcc | 450 | out: |
a6afdde9 | 451 | close(rfd); |
78ae2fcc | 452 | |
a6afdde9 | 453 | return ret; |
78ae2fcc | 454 | } |
455 | ||
2656d231 | 456 | static int mount_rootfs_file(const char *rootfs, const char *target) |
78ae2fcc | 457 | { |
a6afdde9 DL |
458 | struct dirent dirent, *direntp; |
459 | struct loop_info64 loinfo; | |
9ba8130c | 460 | int ret = -1, fd = -1, rc; |
a6afdde9 DL |
461 | DIR *dir; |
462 | char path[MAXPATHLEN]; | |
78ae2fcc | 463 | |
a6afdde9 DL |
464 | dir = opendir("/dev"); |
465 | if (!dir) { | |
466 | SYSERROR("failed to open '/dev'"); | |
78ae2fcc | 467 | return -1; |
468 | } | |
469 | ||
a6afdde9 DL |
470 | while (!readdir_r(dir, &dirent, &direntp)) { |
471 | ||
472 | if (!direntp) | |
473 | break; | |
474 | ||
475 | if (!strcmp(direntp->d_name, ".")) | |
476 | continue; | |
477 | ||
478 | if (!strcmp(direntp->d_name, "..")) | |
479 | continue; | |
480 | ||
481 | if (strncmp(direntp->d_name, "loop", 4)) | |
482 | continue; | |
483 | ||
9ba8130c SH |
484 | rc = snprintf(path, MAXPATHLEN, "/dev/%s", direntp->d_name); |
485 | if (rc < 0 || rc >= MAXPATHLEN) | |
486 | continue; | |
487 | ||
a6afdde9 DL |
488 | fd = open(path, O_RDWR); |
489 | if (fd < 0) | |
490 | continue; | |
491 | ||
492 | if (ioctl(fd, LOOP_GET_STATUS64, &loinfo) == 0) { | |
493 | close(fd); | |
494 | continue; | |
495 | } | |
496 | ||
497 | if (errno != ENXIO) { | |
498 | WARN("unexpected error for ioctl on '%s': %m", | |
499 | direntp->d_name); | |
500 | continue; | |
501 | } | |
502 | ||
503 | DEBUG("found '%s' free lodev", path); | |
504 | ||
505 | ret = setup_lodev(rootfs, fd, &loinfo); | |
506 | if (!ret) | |
2656d231 | 507 | ret = mount_unknow_fs(path, target, 0); |
a6afdde9 DL |
508 | close(fd); |
509 | ||
510 | break; | |
511 | } | |
512 | ||
513 | if (closedir(dir)) | |
514 | WARN("failed to close directory"); | |
515 | ||
516 | return ret; | |
78ae2fcc | 517 | } |
518 | ||
2656d231 | 519 | static int mount_rootfs_block(const char *rootfs, const char *target) |
a6afdde9 | 520 | { |
2656d231 | 521 | return mount_unknow_fs(rootfs, target, 0); |
a6afdde9 DL |
522 | } |
523 | ||
0c547523 SH |
524 | /* |
525 | * pin_rootfs | |
526 | * if rootfs is a directory, then open ${rootfs}.hold for writing for the | |
527 | * duration of the container run, to prevent the container from marking the | |
528 | * underlying fs readonly on shutdown. | |
529 | * return -1 on error. | |
530 | * return -2 if nothing needed to be pinned. | |
531 | * return an open fd (>=0) if we pinned it. | |
532 | */ | |
533 | int pin_rootfs(const char *rootfs) | |
534 | { | |
535 | char absrootfs[MAXPATHLEN]; | |
536 | char absrootfspin[MAXPATHLEN]; | |
537 | struct stat s; | |
538 | int ret, fd; | |
539 | ||
e99ee0de SH |
540 | if (rootfs == NULL || strlen(rootfs) == 0) |
541 | return 0; | |
542 | ||
0c547523 SH |
543 | if (!realpath(rootfs, absrootfs)) { |
544 | SYSERROR("failed to get real path for '%s'", rootfs); | |
545 | return -1; | |
546 | } | |
547 | ||
548 | if (access(absrootfs, F_OK)) { | |
549 | SYSERROR("'%s' is not accessible", absrootfs); | |
550 | return -1; | |
551 | } | |
552 | ||
553 | if (stat(absrootfs, &s)) { | |
554 | SYSERROR("failed to stat '%s'", absrootfs); | |
555 | return -1; | |
556 | } | |
557 | ||
558 | if (!__S_ISTYPE(s.st_mode, S_IFDIR)) | |
559 | return -2; | |
560 | ||
561 | ret = snprintf(absrootfspin, MAXPATHLEN, "%s%s", absrootfs, ".hold"); | |
562 | if (ret >= MAXPATHLEN) { | |
563 | SYSERROR("pathname too long for rootfs hold file"); | |
564 | return -1; | |
565 | } | |
566 | ||
567 | fd = open(absrootfspin, O_CREAT | O_RDWR, S_IWUSR|S_IRUSR); | |
568 | INFO("opened %s as fd %d\n", absrootfspin, fd); | |
569 | return fd; | |
570 | } | |
571 | ||
2656d231 | 572 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 573 | { |
b09ef133 | 574 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 575 | struct stat s; |
a6afdde9 | 576 | int i; |
78ae2fcc | 577 | |
a6afdde9 | 578 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 579 | |
580 | struct rootfs_type { | |
581 | int type; | |
582 | rootfs_cb cb; | |
583 | } rtfs_type[] = { | |
2656d231 DL |
584 | { S_IFDIR, mount_rootfs_dir }, |
585 | { S_IFBLK, mount_rootfs_block }, | |
586 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 587 | }; |
0ad19a3f | 588 | |
4c8ab83b | 589 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 590 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 591 | return -1; |
592 | } | |
b09ef133 | 593 | |
b09ef133 | 594 | if (access(absrootfs, F_OK)) { |
36eb9bde | 595 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 596 | return -1; |
597 | } | |
598 | ||
78ae2fcc | 599 | if (stat(absrootfs, &s)) { |
36eb9bde | 600 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 601 | return -1; |
602 | } | |
603 | ||
78ae2fcc | 604 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 605 | |
78ae2fcc | 606 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
607 | continue; | |
9b0f0477 | 608 | |
a6afdde9 | 609 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 610 | } |
9b0f0477 | 611 | |
36eb9bde | 612 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 613 | return -1; |
0ad19a3f | 614 | } |
615 | ||
4e5440c6 | 616 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 617 | { |
4e5440c6 DL |
618 | if (!utsname) |
619 | return 0; | |
0ad19a3f | 620 | |
4e5440c6 DL |
621 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
622 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 623 | return -1; |
624 | } | |
625 | ||
4e5440c6 | 626 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 627 | |
0ad19a3f | 628 | return 0; |
629 | } | |
630 | ||
33fcb7a0 | 631 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 632 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 633 | { |
7c6ef2a2 SH |
634 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
635 | int i, ret; | |
b0a33c1e | 636 | |
bc9bd0e3 DL |
637 | if (!rootfs->path) |
638 | return 0; | |
639 | ||
b0a33c1e | 640 | for (i = 0; i < tty_info->nbtty; i++) { |
641 | ||
642 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
643 | ||
7c6ef2a2 | 644 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 645 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
646 | if (ret >= sizeof(path)) { |
647 | ERROR("pathname too long for ttys"); | |
648 | return -1; | |
649 | } | |
650 | if (ttydir) { | |
651 | /* create dev/lxc/tty%d" */ | |
9ba8130c | 652 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", |
7c6ef2a2 SH |
653 | rootfs->mount, ttydir, i + 1); |
654 | if (ret >= sizeof(lxcpath)) { | |
655 | ERROR("pathname too long for ttys"); | |
656 | return -1; | |
657 | } | |
658 | ret = creat(lxcpath, 0660); | |
659 | if (ret==-1 && errno != EEXIST) { | |
660 | SYSERROR("error creating %s\n", lxcpath); | |
661 | return -1; | |
662 | } | |
663 | close(ret); | |
664 | ret = unlink(path); | |
665 | if (ret && errno != ENOENT) { | |
666 | SYSERROR("error unlinking %s\n", path); | |
667 | return -1; | |
668 | } | |
b0a33c1e | 669 | |
7c6ef2a2 SH |
670 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
671 | WARN("failed to mount '%s'->'%s'", | |
672 | pty_info->name, path); | |
673 | continue; | |
674 | } | |
13954cce | 675 | |
9ba8130c SH |
676 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
677 | if (ret >= sizeof(lxcpath)) { | |
678 | ERROR("tty pathname too long"); | |
679 | return -1; | |
680 | } | |
7c6ef2a2 SH |
681 | ret = symlink(lxcpath, path); |
682 | if (ret) { | |
683 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
684 | return -1; | |
685 | } | |
686 | } else { | |
c6883f38 SH |
687 | /* If we populated /dev, then we need to create /dev/ttyN */ |
688 | if (access(path, F_OK)) { | |
689 | ret = creat(path, 0660); | |
690 | if (ret==-1) { | |
691 | SYSERROR("error creating %s\n", path); | |
692 | /* this isn't fatal, continue */ | |
693 | } else | |
694 | close(ret); | |
695 | } | |
7c6ef2a2 SH |
696 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
697 | WARN("failed to mount '%s'->'%s'", | |
698 | pty_info->name, path); | |
699 | continue; | |
700 | } | |
b0a33c1e | 701 | } |
702 | } | |
703 | ||
cd54d859 DL |
704 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
705 | ||
b0a33c1e | 706 | return 0; |
707 | } | |
708 | ||
7a7ff0c6 | 709 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
710 | { |
711 | struct lxc_list *mountlist, *listentry, *iterator; | |
712 | char *pivotdir, *mountpoint, *mountentry; | |
713 | int found; | |
714 | void **cbparm; | |
715 | ||
716 | mountentry = buffer; | |
717 | cbparm = (void **)data; | |
718 | ||
719 | mountlist = cbparm[0]; | |
720 | pivotdir = cbparm[1]; | |
721 | ||
722 | /* parse entry, first field is mountname, ignore */ | |
723 | mountpoint = strtok(mountentry, " "); | |
724 | if (!mountpoint) | |
725 | return -1; | |
726 | ||
727 | /* second field is mountpoint */ | |
728 | mountpoint = strtok(NULL, " "); | |
729 | if (!mountpoint) | |
730 | return -1; | |
731 | ||
732 | /* only consider mountpoints below old root fs */ | |
733 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
734 | return 0; | |
735 | ||
736 | /* filter duplicate mountpoints */ | |
737 | found = 0; | |
738 | lxc_list_for_each(iterator, mountlist) { | |
739 | if (!strcmp(iterator->elem, mountpoint)) { | |
740 | found = 1; | |
741 | break; | |
742 | } | |
743 | } | |
744 | if (found) | |
745 | return 0; | |
746 | ||
747 | /* add entry to list */ | |
748 | listentry = malloc(sizeof(*listentry)); | |
749 | if (!listentry) { | |
750 | SYSERROR("malloc for mountpoint listentry failed"); | |
751 | return -1; | |
752 | } | |
753 | ||
754 | listentry->elem = strdup(mountpoint); | |
755 | if (!listentry->elem) { | |
756 | SYSERROR("strdup failed"); | |
757 | return -1; | |
758 | } | |
759 | lxc_list_add_tail(mountlist, listentry); | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
cc6f6dd7 | 764 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 765 | { |
2382ecff | 766 | char path[MAXPATHLEN]; |
bf601689 | 767 | void *cbparm[2]; |
9ebb03ad | 768 | struct lxc_list mountlist, *iterator, *next; |
bf601689 | 769 | int ok, still_mounted, last_still_mounted; |
9ba8130c | 770 | int rc; |
bf601689 MH |
771 | |
772 | /* read and parse /proc/mounts in old root fs */ | |
773 | lxc_list_init(&mountlist); | |
774 | ||
cc6f6dd7 | 775 | /* oldrootfs is on the top tree directory now */ |
9ba8130c SH |
776 | rc = snprintf(path, sizeof(path), "/%s", oldrootfs); |
777 | if (rc >= sizeof(path)) { | |
778 | ERROR("rootfs name too long"); | |
779 | return -1; | |
780 | } | |
bf601689 | 781 | cbparm[0] = &mountlist; |
bf601689 | 782 | |
cc6f6dd7 | 783 | cbparm[1] = strdup(path); |
bf601689 MH |
784 | if (!cbparm[1]) { |
785 | SYSERROR("strdup failed"); | |
786 | return -1; | |
787 | } | |
788 | ||
9ba8130c SH |
789 | rc = snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
790 | if (rc >= sizeof(path)) { | |
791 | ERROR("container proc/mounts name too long"); | |
792 | return -1; | |
793 | } | |
cc6f6dd7 DL |
794 | |
795 | ok = lxc_file_for_each_line(path, | |
796 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
797 | if (ok < 0) { |
798 | SYSERROR("failed to read or parse mount list '%s'", path); | |
799 | return -1; | |
800 | } | |
801 | ||
802 | /* umount filesystems until none left or list no longer shrinks */ | |
803 | still_mounted = 0; | |
804 | do { | |
805 | last_still_mounted = still_mounted; | |
806 | still_mounted = 0; | |
807 | ||
9ebb03ad | 808 | lxc_list_for_each_safe(iterator, &mountlist, next) { |
bf601689 | 809 | |
c08556c6 | 810 | /* umount normally */ |
bf601689 MH |
811 | if (!umount(iterator->elem)) { |
812 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
813 | lxc_list_del(iterator); | |
814 | continue; | |
815 | } | |
816 | ||
bf601689 MH |
817 | still_mounted++; |
818 | } | |
7df119ee | 819 | |
bf601689 MH |
820 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
821 | ||
7df119ee | 822 | |
c08556c6 DL |
823 | lxc_list_for_each(iterator, &mountlist) { |
824 | ||
825 | /* let's try a lazy umount */ | |
826 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
827 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
828 | continue; | |
829 | } | |
830 | ||
831 | /* be more brutal (nfs) */ | |
832 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
833 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
834 | continue; | |
835 | } | |
836 | ||
7df119ee | 837 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 838 | } |
bf601689 | 839 | |
cc6f6dd7 DL |
840 | return 0; |
841 | } | |
842 | ||
843 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
844 | { | |
845 | char path[MAXPATHLEN]; | |
846 | int remove_pivotdir = 0; | |
9ba8130c | 847 | int rc; |
cc6f6dd7 DL |
848 | |
849 | /* change into new root fs */ | |
850 | if (chdir(rootfs)) { | |
851 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
852 | return -1; | |
853 | } | |
854 | ||
855 | if (!pivotdir) | |
30c5d292 | 856 | pivotdir = "lxc_putold"; |
cc6f6dd7 | 857 | |
4f9293b1 | 858 | /* compute the full path to pivotdir under rootfs */ |
9ba8130c SH |
859 | rc = snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
860 | if (rc >= sizeof(path)) { | |
861 | ERROR("pivot dir name too long"); | |
862 | return -1; | |
863 | } | |
cc6f6dd7 DL |
864 | |
865 | if (access(path, F_OK)) { | |
866 | ||
867 | if (mkdir_p(path, 0755)) { | |
868 | SYSERROR("failed to create pivotdir '%s'", path); | |
869 | return -1; | |
870 | } | |
871 | ||
872 | remove_pivotdir = 1; | |
873 | DEBUG("created '%s' directory", path); | |
874 | } | |
875 | ||
876 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
877 | ||
878 | /* pivot_root into our new root fs */ | |
879 | if (pivot_root(".", path)) { | |
880 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
881 | return -1; |
882 | } | |
cc6f6dd7 DL |
883 | |
884 | if (chdir("/")) { | |
885 | SYSERROR("can't chdir to / after pivot_root"); | |
886 | return -1; | |
887 | } | |
888 | ||
889 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
890 | ||
891 | /* we switch from absolute path to relative path */ | |
892 | if (umount_oldrootfs(pivotdir)) | |
893 | return -1; | |
bf601689 | 894 | |
c08556c6 DL |
895 | /* remove temporary mount point, we don't consider the removing |
896 | * as fatal */ | |
a91d897a FW |
897 | if (remove_pivotdir && rmdir(pivotdir)) |
898 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 899 | |
bf601689 MH |
900 | return 0; |
901 | } | |
902 | ||
91c3830e SH |
903 | /* |
904 | * Do we want to add options for max size of /dev and a file to | |
905 | * specify which devices to create? | |
906 | */ | |
907 | static int mount_autodev(char *root) | |
908 | { | |
909 | int ret; | |
910 | char path[MAXPATHLEN]; | |
911 | ||
912 | INFO("Mounting /dev under %s\n", root); | |
913 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); | |
914 | if (ret < 0 || ret > MAXPATHLEN) | |
915 | return -1; | |
916 | ret = mount("none", path, "tmpfs", 0, "size=100000"); | |
917 | if (ret) { | |
918 | SYSERROR("Failed to mount /dev at %s\n", root); | |
919 | return -1; | |
920 | } | |
921 | ret = snprintf(path, MAXPATHLEN, "%s/dev/pts", root); | |
922 | if (ret < 0 || ret >= MAXPATHLEN) | |
923 | return -1; | |
924 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
925 | if (ret) { | |
926 | SYSERROR("Failed to create /dev/pts in container"); | |
927 | return -1; | |
928 | } | |
929 | ||
930 | INFO("Mounted /dev under %s\n", root); | |
931 | return 0; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Try to run MAKEDEV console in the container. If something fails, | |
936 | * continue anyway as it should not be detrimental to the container. | |
937 | * This makes sure that things like /dev/vcs* exist. | |
938 | * (Pass devpath in to reduce stack usage) | |
939 | */ | |
940 | static void run_makedev(char *devpath) | |
941 | { | |
942 | int curd; | |
943 | int ret; | |
944 | ||
945 | curd = open(".", O_RDONLY); | |
946 | if (curd < 0) | |
947 | return; | |
948 | ret = chdir(devpath); | |
949 | if (ret) { | |
950 | close(curd); | |
951 | return; | |
952 | } | |
953 | if (run_buffer("/sbin/MAKEDEV console")) | |
954 | INFO("Error running MAKEDEV console in %s", devpath); | |
61435768 SH |
955 | ret = fchdir(curd); |
956 | if (ret) | |
957 | INFO("Error returning to original directory: expect breakage"); | |
91c3830e SH |
958 | close(curd); |
959 | } | |
960 | ||
c6883f38 SH |
961 | struct lxc_devs { |
962 | char *name; | |
963 | mode_t mode; | |
964 | int maj; | |
965 | int min; | |
966 | }; | |
967 | ||
968 | struct lxc_devs lxc_devs[] = { | |
969 | { "null", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 3 }, | |
970 | { "zero", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 5 }, | |
971 | { "full", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 7 }, | |
972 | { "urandom", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 9 }, | |
973 | { "random", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 8 }, | |
974 | { "tty", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 5, 0 }, | |
975 | { "console", S_IFCHR | S_IRUSR | S_IWUSR, 5, 1 }, | |
976 | }; | |
977 | ||
c6883f38 SH |
978 | static int setup_autodev(char *root) |
979 | { | |
980 | int ret; | |
981 | struct lxc_devs *d; | |
982 | char path[MAXPATHLEN]; | |
983 | int i; | |
3a32201c | 984 | mode_t cmask; |
c6883f38 | 985 | |
91c3830e SH |
986 | INFO("Creating initial consoles under %s/dev\n", root); |
987 | ||
c6883f38 | 988 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); |
91c3830e SH |
989 | if (ret < 0 || ret >= MAXPATHLEN) { |
990 | ERROR("Error calculating container /dev location"); | |
c6883f38 | 991 | return -1; |
91c3830e SH |
992 | } else |
993 | run_makedev(path); | |
994 | ||
995 | INFO("Populating /dev under %s\n", root); | |
3a32201c | 996 | cmask = umask(S_IXUSR | S_IXGRP | S_IXOTH); |
c6883f38 SH |
997 | for (i = 0; i < sizeof(lxc_devs) / sizeof(lxc_devs[0]); i++) { |
998 | d = &lxc_devs[i]; | |
999 | ret = snprintf(path, MAXPATHLEN, "%s/dev/%s", root, d->name); | |
1000 | if (ret < 0 || ret >= MAXPATHLEN) | |
1001 | return -1; | |
1002 | ret = mknod(path, d->mode, makedev(d->maj, d->min)); | |
91c3830e | 1003 | if (ret && errno != EEXIST) { |
c6883f38 SH |
1004 | SYSERROR("Error creating %s\n", d->name); |
1005 | return -1; | |
1006 | } | |
1007 | } | |
3a32201c | 1008 | umask(cmask); |
c6883f38 SH |
1009 | |
1010 | INFO("Populated /dev under %s\n", root); | |
1011 | return 0; | |
1012 | } | |
1013 | ||
cc28d0b0 SH |
1014 | /* |
1015 | * Detect whether / is mounted MS_SHARED. The only way I know of to | |
1016 | * check that is through /proc/self/mountinfo. | |
1017 | * I'm only checking for /. If the container rootfs or mount location | |
1018 | * is MS_SHARED, but not '/', then you're out of luck - figuring that | |
1019 | * out would be too much work to be worth it. | |
1020 | */ | |
1021 | #define LINELEN 4096 | |
1022 | int detect_shared_rootfs(void) | |
1023 | { | |
1024 | char buf[LINELEN], *p; | |
1025 | FILE *f; | |
1026 | int i; | |
1027 | char *p2; | |
1028 | ||
1029 | f = fopen("/proc/self/mountinfo", "r"); | |
1030 | if (!f) | |
1031 | return 0; | |
1032 | while ((p = fgets(buf, LINELEN, f))) { | |
1033 | INFO("looking at .%s.", p); | |
1034 | for (p = buf, i=0; p && i < 4; i++) | |
1035 | p = index(p+1, ' '); | |
1036 | if (!p) | |
1037 | continue; | |
1038 | p2 = index(p+1, ' '); | |
1039 | if (!p2) | |
1040 | continue; | |
1041 | *p2 = '\0'; | |
1042 | INFO("now p is .%s.", p); | |
1043 | if (strcmp(p+1, "/") == 0) { | |
1044 | // this is '/'. is it shared? | |
1045 | p = index(p2+1, ' '); | |
1046 | if (strstr(p, "shared:")) | |
1047 | return 1; | |
1048 | } | |
1049 | } | |
1050 | fclose(f); | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * I'll forgive you for asking whether all of this is needed :) The | |
1056 | * answer is yes. | |
1057 | * pivot_root will fail if the new root, the put_old dir, or the parent | |
1058 | * of current->fs->root are MS_SHARED. (parent of current->fs_root may | |
1059 | * or may not be current->fs_root - if we assumed it always was, we could | |
1060 | * just mount --make-rslave /). So, | |
1061 | * 1. mount a tiny tmpfs to be parent of current->fs->root. | |
1062 | * 2. make that MS_SLAVE | |
1063 | * 3. make a 'root' directory under that | |
1064 | * 4. mount --rbind / under the $tinyroot/root. | |
1065 | * 5. make that rslave | |
1066 | * 6. chdir and chroot into $tinyroot/root | |
1067 | * 7. $tinyroot will be unmounted by our parent in start.c | |
1068 | */ | |
1069 | static int chroot_into_slave(struct lxc_conf *conf) | |
1070 | { | |
1071 | char path[MAXPATHLEN]; | |
1072 | const char *destpath = conf->rootfs.mount; | |
1073 | int ret; | |
1074 | ||
1075 | if (mount(destpath, destpath, NULL, MS_BIND, 0)) { | |
1076 | SYSERROR("failed to mount %s bind", destpath); | |
1077 | return -1; | |
1078 | } | |
1079 | if (mount("", destpath, NULL, MS_SLAVE, 0)) { | |
1080 | SYSERROR("failed to make %s slave", destpath); | |
1081 | return -1; | |
1082 | } | |
1083 | if (mount("none", destpath, "tmpfs", 0, "size=10000")) { | |
1084 | SYSERROR("Failed to mount tmpfs / at %s", destpath); | |
1085 | return -1; | |
1086 | } | |
1087 | ret = snprintf(path, MAXPATHLEN, "%s/root", destpath); | |
1088 | if (ret < 0 || ret >= MAXPATHLEN) { | |
1089 | ERROR("out of memory making root path"); | |
1090 | return -1; | |
1091 | } | |
1092 | if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)) { | |
1093 | SYSERROR("Failed to create /dev/pts in container"); | |
1094 | return -1; | |
1095 | } | |
1096 | if (mount("/", path, NULL, MS_BIND|MS_REC, 0)) { | |
1097 | SYSERROR("Failed to rbind mount / to %s", path); | |
1098 | return -1; | |
1099 | } | |
1100 | if (mount("", destpath, NULL, MS_SLAVE|MS_REC, 0)) { | |
1101 | SYSERROR("Failed to make tmp-/ at %s rslave", path); | |
1102 | return -1; | |
1103 | } | |
1104 | if (chdir(path)) { | |
1105 | SYSERROR("Failed to chdir into tmp-/"); | |
1106 | return -1; | |
1107 | } | |
1108 | if (chroot(path)) { | |
1109 | SYSERROR("Failed to chroot into tmp-/"); | |
1110 | return -1; | |
1111 | } | |
1112 | INFO("Chrooted into tmp-/ at %s\n", path); | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int setup_rootfs(struct lxc_conf *conf) | |
0ad19a3f | 1117 | { |
cc28d0b0 SH |
1118 | const struct lxc_rootfs *rootfs = &conf->rootfs; |
1119 | ||
33fcb7a0 | 1120 | if (!rootfs->path) |
c69bd12f | 1121 | return 0; |
0ad19a3f | 1122 | |
12297168 | 1123 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 1124 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 1125 | rootfs->mount); |
b1789442 DL |
1126 | return -1; |
1127 | } | |
1128 | ||
cc28d0b0 SH |
1129 | if (detect_shared_rootfs()) { |
1130 | if (chroot_into_slave(conf)) { | |
1131 | ERROR("Failed to chroot into slave /"); | |
1132 | return -1; | |
1133 | } | |
1134 | } | |
1135 | ||
2656d231 | 1136 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 1137 | ERROR("failed to mount rootfs"); |
c3f0a28c | 1138 | return -1; |
1139 | } | |
0ad19a3f | 1140 | |
12297168 | 1141 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 1142 | |
ac778708 DL |
1143 | return 0; |
1144 | } | |
1145 | ||
1146 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
1147 | { | |
ac778708 DL |
1148 | if (!rootfs->path) |
1149 | return 0; | |
1150 | ||
12297168 | 1151 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 1152 | ERROR("failed to setup pivot root"); |
25368b52 | 1153 | return -1; |
c69bd12f DL |
1154 | } |
1155 | ||
25368b52 | 1156 | return 0; |
0ad19a3f | 1157 | } |
1158 | ||
d852c78c | 1159 | static int setup_pts(int pts) |
3c26f34e | 1160 | { |
77890c6d SW |
1161 | char target[PATH_MAX]; |
1162 | ||
d852c78c DL |
1163 | if (!pts) |
1164 | return 0; | |
3c26f34e | 1165 | |
1166 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 1167 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 1168 | return -1; |
1169 | } | |
1170 | ||
a6afdde9 DL |
1171 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
1172 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 1173 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 1174 | return -1; |
1175 | } | |
1176 | ||
3c26f34e | 1177 | if (access("/dev/ptmx", F_OK)) { |
1178 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
1179 | goto out; | |
36eb9bde | 1180 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1181 | return -1; |
1182 | } | |
1183 | ||
77890c6d SW |
1184 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
1185 | goto out; | |
1186 | ||
3c26f34e | 1187 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
1188 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 1189 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1190 | return -1; |
1191 | } | |
cd54d859 DL |
1192 | |
1193 | INFO("created new pts instance"); | |
d852c78c | 1194 | |
3c26f34e | 1195 | out: |
1196 | return 0; | |
1197 | } | |
1198 | ||
cccc74b5 DL |
1199 | static int setup_personality(int persona) |
1200 | { | |
1201 | if (persona == -1) | |
1202 | return 0; | |
1203 | ||
1204 | if (personality(persona) < 0) { | |
1205 | SYSERROR("failed to set personality to '0x%x'", persona); | |
1206 | return -1; | |
1207 | } | |
1208 | ||
1209 | INFO("set personality to '0x%x'", persona); | |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
7c6ef2a2 | 1214 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 1215 | const struct lxc_console *console) |
6e590161 | 1216 | { |
63376d7d DL |
1217 | char path[MAXPATHLEN]; |
1218 | struct stat s; | |
7c6ef2a2 | 1219 | int ret; |
52e35957 | 1220 | |
7c6ef2a2 SH |
1221 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
1222 | if (ret >= sizeof(path)) { | |
1223 | ERROR("console path too long\n"); | |
1224 | return -1; | |
1225 | } | |
52e35957 | 1226 | |
63376d7d | 1227 | if (access(path, F_OK)) { |
466978b0 | 1228 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 1229 | return 0; |
52e35957 DL |
1230 | } |
1231 | ||
f78a1f32 | 1232 | if (console->peer == -1) { |
63376d7d | 1233 | INFO("no console output required"); |
f78a1f32 DL |
1234 | return 0; |
1235 | } | |
ed502555 | 1236 | |
63376d7d DL |
1237 | if (stat(path, &s)) { |
1238 | SYSERROR("failed to stat '%s'", path); | |
1239 | return -1; | |
1240 | } | |
1241 | ||
1242 | if (chmod(console->name, s.st_mode)) { | |
1243 | SYSERROR("failed to set mode '0%o' to '%s'", | |
1244 | s.st_mode, console->name); | |
1245 | return -1; | |
1246 | } | |
13954cce | 1247 | |
63376d7d DL |
1248 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
1249 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 1250 | return -1; |
1251 | } | |
1252 | ||
63376d7d | 1253 | INFO("console has been setup"); |
7c6ef2a2 SH |
1254 | return 0; |
1255 | } | |
1256 | ||
1257 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
1258 | const struct lxc_console *console, | |
1259 | char *ttydir) | |
1260 | { | |
1261 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
1262 | int ret; | |
1263 | ||
1264 | /* create rootfs/dev/<ttydir> directory */ | |
1265 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
1266 | ttydir); | |
1267 | if (ret >= sizeof(path)) | |
1268 | return -1; | |
1269 | ret = mkdir(path, 0755); | |
1270 | if (ret && errno != EEXIST) { | |
1271 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
1272 | return -1; | |
1273 | } | |
1274 | INFO("created %s\n", path); | |
1275 | ||
1276 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
1277 | rootfs->mount, ttydir); | |
1278 | if (ret >= sizeof(lxcpath)) { | |
1279 | ERROR("console path too long\n"); | |
1280 | return -1; | |
1281 | } | |
1282 | ||
1283 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
1284 | ret = unlink(path); | |
1285 | if (ret && errno != ENOENT) { | |
1286 | SYSERROR("error unlinking %s\n", path); | |
1287 | return -1; | |
1288 | } | |
1289 | ||
1290 | ret = creat(lxcpath, 0660); | |
1291 | if (ret==-1 && errno != EEXIST) { | |
1292 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
1293 | return -1; | |
1294 | } | |
1295 | close(ret); | |
1296 | ||
1297 | if (console->peer == -1) { | |
1298 | INFO("no console output required"); | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
1303 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
1304 | return -1; | |
1305 | } | |
1306 | ||
1307 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
9ba8130c SH |
1308 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); |
1309 | if (ret >= sizeof(lxcpath)) { | |
1310 | ERROR("lxc/console path too long"); | |
1311 | return -1; | |
1312 | } | |
7c6ef2a2 SH |
1313 | ret = symlink(lxcpath, path); |
1314 | if (ret) { | |
1315 | SYSERROR("failed to create symlink for console"); | |
1316 | return -1; | |
1317 | } | |
1318 | ||
1319 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 1320 | |
6e590161 | 1321 | return 0; |
1322 | } | |
1323 | ||
7c6ef2a2 SH |
1324 | static int setup_console(const struct lxc_rootfs *rootfs, |
1325 | const struct lxc_console *console, | |
1326 | char *ttydir) | |
1327 | { | |
1328 | /* We don't have a rootfs, /dev/console will be shared */ | |
1329 | if (!rootfs->path) | |
1330 | return 0; | |
1331 | if (!ttydir) | |
1332 | return setup_dev_console(rootfs, console); | |
1333 | ||
1334 | return setup_ttydir_console(rootfs, console, ttydir); | |
1335 | } | |
1336 | ||
1bd051a6 SH |
1337 | static int setup_kmsg(const struct lxc_rootfs *rootfs, |
1338 | const struct lxc_console *console) | |
1339 | { | |
1340 | char kpath[MAXPATHLEN]; | |
1341 | int ret; | |
1342 | ||
222fea5a DE |
1343 | if (!rootfs->path) |
1344 | return 0; | |
1bd051a6 SH |
1345 | ret = snprintf(kpath, sizeof(kpath), "%s/dev/kmsg", rootfs->mount); |
1346 | if (ret < 0 || ret >= sizeof(kpath)) | |
1347 | return -1; | |
1348 | ||
1349 | ret = unlink(kpath); | |
1350 | if (ret && errno != ENOENT) { | |
1351 | SYSERROR("error unlinking %s\n", kpath); | |
1352 | return -1; | |
1353 | } | |
1354 | ||
1355 | ret = symlink("console", kpath); | |
1356 | if (ret) { | |
1357 | SYSERROR("failed to create symlink for kmsg"); | |
1358 | return -1; | |
1359 | } | |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | ||
cc28d0b0 | 1364 | int setup_cgroup(const char *name, struct lxc_list *cgroups) |
576f946d | 1365 | { |
102a5303 DL |
1366 | struct lxc_list *iterator; |
1367 | struct lxc_cgroup *cg; | |
88329c69 | 1368 | int ret = -1; |
6f4a3756 | 1369 | |
102a5303 DL |
1370 | if (lxc_list_empty(cgroups)) |
1371 | return 0; | |
6f4a3756 | 1372 | |
102a5303 | 1373 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 1374 | |
102a5303 | 1375 | cg = iterator->elem; |
6f4a3756 | 1376 | |
102a5303 | 1377 | if (lxc_cgroup_set(name, cg->subsystem, cg->value)) |
88329c69 | 1378 | goto out; |
6f4a3756 | 1379 | |
102a5303 | 1380 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 1381 | } |
13954cce | 1382 | |
88329c69 | 1383 | ret = 0; |
cd54d859 | 1384 | INFO("cgroup has been setup"); |
88329c69 MN |
1385 | out: |
1386 | return ret; | |
576f946d | 1387 | } |
1388 | ||
998ac676 RT |
1389 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
1390 | { | |
1391 | struct mount_opt *mo; | |
1392 | ||
1393 | /* If opt is found in mount_opt, set or clear flags. | |
1394 | * Otherwise append it to data. */ | |
1395 | ||
1396 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1397 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1398 | if (mo->clear) | |
1399 | *flags &= ~mo->flag; | |
1400 | else | |
1401 | *flags |= mo->flag; | |
1402 | return; | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | if (strlen(*data)) | |
1407 | strcat(*data, ","); | |
1408 | strcat(*data, opt); | |
1409 | } | |
1410 | ||
911324ef | 1411 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1412 | char **mntdata) |
1413 | { | |
1414 | char *s, *data; | |
1415 | char *p, *saveptr = NULL; | |
1416 | ||
911324ef | 1417 | *mntdata = NULL; |
91656ce5 | 1418 | *mntflags = 0L; |
911324ef DL |
1419 | |
1420 | if (!mntopts) | |
998ac676 RT |
1421 | return 0; |
1422 | ||
911324ef | 1423 | s = strdup(mntopts); |
998ac676 | 1424 | if (!s) { |
36eb9bde | 1425 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1426 | return -1; |
1427 | } | |
1428 | ||
1429 | data = malloc(strlen(s) + 1); | |
1430 | if (!data) { | |
36eb9bde | 1431 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1432 | free(s); |
1433 | return -1; | |
1434 | } | |
1435 | *data = 0; | |
1436 | ||
1437 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1438 | p = strtok_r(NULL, ",", &saveptr)) | |
1439 | parse_mntopt(p, mntflags, &data); | |
1440 | ||
1441 | if (*data) | |
1442 | *mntdata = data; | |
1443 | else | |
1444 | free(data); | |
1445 | free(s); | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
911324ef DL |
1450 | static int mount_entry(const char *fsname, const char *target, |
1451 | const char *fstype, unsigned long mountflags, | |
1452 | const char *data) | |
1453 | { | |
1454 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1455 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1456 | return -1; | |
1457 | } | |
1458 | ||
1459 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1460 | ||
1461 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1462 | fsname, target); | |
1463 | ||
1464 | if (mount(fsname, target, fstype, | |
1465 | mountflags | MS_REMOUNT, data)) { | |
1466 | SYSERROR("failed to mount '%s' on '%s'", | |
1467 | fsname, target); | |
1468 | return -1; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1473 | ||
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1478 | { |
998ac676 RT |
1479 | unsigned long mntflags; |
1480 | char *mntdata; | |
911324ef DL |
1481 | int ret; |
1482 | ||
1483 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1484 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1485 | return -1; | |
1486 | } | |
1487 | ||
1488 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1489 | mntent->mnt_type, mntflags, mntdata); | |
1490 | ||
1491 | free(mntdata); | |
1492 | ||
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
80a881b2 SH |
1497 | const struct lxc_rootfs *rootfs, |
1498 | const char *lxc_name) | |
911324ef | 1499 | { |
013bd428 | 1500 | char *aux; |
59760f5d | 1501 | char path[MAXPATHLEN]; |
911324ef DL |
1502 | unsigned long mntflags; |
1503 | char *mntdata; | |
80a881b2 | 1504 | int r, ret = 0, offset; |
0ad19a3f | 1505 | |
911324ef DL |
1506 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1507 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1508 | return -1; | |
1509 | } | |
1bc60a65 | 1510 | |
80a881b2 | 1511 | /* if rootfs->path is a blockdev path, allow container fstab to |
e29bf450 DE |
1512 | * use $LXCPATH/CN/rootfs as the target prefix */ |
1513 | r = snprintf(path, MAXPATHLEN, LXCPATH "/%s/rootfs", lxc_name); | |
80a881b2 SH |
1514 | if (r < 0 || r >= MAXPATHLEN) |
1515 | goto skipvarlib; | |
1516 | ||
1517 | aux = strstr(mntent->mnt_dir, path); | |
1518 | if (aux) { | |
1519 | offset = strlen(path); | |
1520 | goto skipabs; | |
1521 | } | |
1522 | ||
1523 | skipvarlib: | |
013bd428 DL |
1524 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1525 | if (!aux) { | |
1526 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1527 | goto out; | |
1528 | } | |
80a881b2 SH |
1529 | offset = strlen(rootfs->path); |
1530 | ||
1531 | skipabs: | |
013bd428 | 1532 | |
9ba8130c | 1533 | r = snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
80a881b2 SH |
1534 | aux + offset); |
1535 | if (r < 0 || r >= MAXPATHLEN) { | |
1536 | WARN("pathnme too long for '%s'", mntent->mnt_dir); | |
1537 | ret = -1; | |
1538 | goto out; | |
1539 | } | |
1540 | ||
d330fe7b | 1541 | |
013bd428 | 1542 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1543 | mntflags, mntdata); |
0ad19a3f | 1544 | |
013bd428 | 1545 | out: |
911324ef DL |
1546 | free(mntdata); |
1547 | return ret; | |
1548 | } | |
d330fe7b | 1549 | |
911324ef DL |
1550 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1551 | const char *rootfs) | |
1552 | { | |
1553 | char path[MAXPATHLEN]; | |
1554 | unsigned long mntflags; | |
1555 | char *mntdata; | |
1556 | int ret; | |
d330fe7b | 1557 | |
911324ef DL |
1558 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1559 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1560 | return -1; | |
1561 | } | |
d330fe7b | 1562 | |
911324ef | 1563 | /* relative to root mount point */ |
9ba8130c SH |
1564 | ret = snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); |
1565 | if (ret >= sizeof(path)) { | |
1566 | ERROR("path name too long"); | |
1567 | return -1; | |
1568 | } | |
911324ef DL |
1569 | |
1570 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1571 | mntflags, mntdata); | |
1572 | ||
1573 | free(mntdata); | |
998ac676 | 1574 | |
911324ef DL |
1575 | return ret; |
1576 | } | |
1577 | ||
80a881b2 SH |
1578 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file, |
1579 | const char *lxc_name) | |
911324ef DL |
1580 | { |
1581 | struct mntent *mntent; | |
1582 | int ret = -1; | |
e76b8764 | 1583 | |
911324ef | 1584 | while ((mntent = getmntent(file))) { |
e76b8764 | 1585 | |
911324ef DL |
1586 | if (!rootfs->path) { |
1587 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1588 | goto out; |
911324ef | 1589 | continue; |
e76b8764 CDC |
1590 | } |
1591 | ||
911324ef DL |
1592 | /* We have a separate root, mounts are relative to it */ |
1593 | if (mntent->mnt_dir[0] != '/') { | |
1594 | if (mount_entry_on_relative_rootfs(mntent, | |
1595 | rootfs->mount)) | |
1596 | goto out; | |
1597 | continue; | |
1598 | } | |
cd54d859 | 1599 | |
80a881b2 | 1600 | if (mount_entry_on_absolute_rootfs(mntent, rootfs, lxc_name)) |
911324ef | 1601 | goto out; |
0ad19a3f | 1602 | } |
cd54d859 | 1603 | |
0ad19a3f | 1604 | ret = 0; |
cd54d859 DL |
1605 | |
1606 | INFO("mount points have been setup"); | |
0ad19a3f | 1607 | out: |
e7938e9e MN |
1608 | return ret; |
1609 | } | |
1610 | ||
80a881b2 SH |
1611 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab, |
1612 | const char *lxc_name) | |
e7938e9e MN |
1613 | { |
1614 | FILE *file; | |
1615 | int ret; | |
1616 | ||
1617 | if (!fstab) | |
1618 | return 0; | |
1619 | ||
1620 | file = setmntent(fstab, "r"); | |
1621 | if (!file) { | |
1622 | SYSERROR("failed to use '%s'", fstab); | |
1623 | return -1; | |
1624 | } | |
1625 | ||
80a881b2 | 1626 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e | 1627 | |
0ad19a3f | 1628 | endmntent(file); |
1629 | return ret; | |
1630 | } | |
1631 | ||
80a881b2 SH |
1632 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount, |
1633 | const char *lxc_name) | |
e7938e9e MN |
1634 | { |
1635 | FILE *file; | |
1636 | struct lxc_list *iterator; | |
1637 | char *mount_entry; | |
1638 | int ret; | |
1639 | ||
1640 | file = tmpfile(); | |
1641 | if (!file) { | |
1642 | ERROR("tmpfile error: %m"); | |
1643 | return -1; | |
1644 | } | |
1645 | ||
1646 | lxc_list_for_each(iterator, mount) { | |
1647 | mount_entry = iterator->elem; | |
1d6b1976 | 1648 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1649 | } |
1650 | ||
1651 | rewind(file); | |
1652 | ||
80a881b2 | 1653 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e MN |
1654 | |
1655 | fclose(file); | |
1656 | return ret; | |
1657 | } | |
1658 | ||
81810dd1 DL |
1659 | static int setup_caps(struct lxc_list *caps) |
1660 | { | |
1661 | struct lxc_list *iterator; | |
1662 | char *drop_entry; | |
d55bc1ad | 1663 | char *ptr; |
81810dd1 DL |
1664 | int i, capid; |
1665 | ||
1666 | lxc_list_for_each(iterator, caps) { | |
1667 | ||
1668 | drop_entry = iterator->elem; | |
1669 | ||
1670 | capid = -1; | |
1671 | ||
1672 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1673 | ||
1674 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1675 | continue; | |
1676 | ||
1677 | capid = caps_opt[i].value; | |
1678 | break; | |
1679 | } | |
1680 | ||
d55bc1ad CS |
1681 | if (capid < 0) { |
1682 | /* try to see if it's numeric, so the user may specify | |
1683 | * capabilities that the running kernel knows about but | |
1684 | * we don't */ | |
1685 | capid = strtol(drop_entry, &ptr, 10); | |
1686 | if (!ptr || *ptr != '\0' || | |
1687 | capid == LONG_MIN || capid == LONG_MAX) | |
1688 | /* not a valid number */ | |
1689 | capid = -1; | |
1690 | else if (capid > lxc_caps_last_cap()) | |
1691 | /* we have a number but it's not a valid | |
1692 | * capability */ | |
1693 | capid = -1; | |
1694 | } | |
1695 | ||
81810dd1 | 1696 | if (capid < 0) { |
1e11be34 DL |
1697 | ERROR("unknown capability %s", drop_entry); |
1698 | return -1; | |
81810dd1 DL |
1699 | } |
1700 | ||
1701 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1702 | ||
1703 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1704 | SYSERROR("failed to remove %s capability", drop_entry); | |
1705 | return -1; | |
1706 | } | |
1707 | ||
1708 | } | |
1709 | ||
1710 | DEBUG("capabilities has been setup"); | |
1711 | ||
1712 | return 0; | |
1713 | } | |
1714 | ||
0ad19a3f | 1715 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1716 | { | |
1717 | struct sockaddr sockaddr; | |
1718 | struct ifreq ifr; | |
1719 | int ret, fd; | |
1720 | ||
3cfc0f3a MN |
1721 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1722 | if (ret) { | |
1723 | ERROR("mac address '%s' conversion failed : %s", | |
1724 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1725 | return -1; |
1726 | } | |
1727 | ||
1728 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1729 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1730 | ||
1731 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1732 | if (fd < 0) { | |
3ab87b66 | 1733 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1734 | return -1; |
1735 | } | |
1736 | ||
1737 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1738 | close(fd); | |
1739 | if (ret) | |
3ab87b66 | 1740 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1741 | |
cd54d859 DL |
1742 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1743 | ||
0ad19a3f | 1744 | return ret; |
1745 | } | |
1746 | ||
82d5ae15 | 1747 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1748 | { |
82d5ae15 DL |
1749 | struct lxc_list *iterator; |
1750 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1751 | int err; |
0ad19a3f | 1752 | |
82d5ae15 DL |
1753 | lxc_list_for_each(iterator, ip) { |
1754 | ||
1755 | inetdev = iterator->elem; | |
1756 | ||
0093bb8c DL |
1757 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1758 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1759 | if (err) { |
1760 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1761 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1762 | return -1; |
1763 | } | |
1764 | } | |
1765 | ||
1766 | return 0; | |
0ad19a3f | 1767 | } |
1768 | ||
82d5ae15 | 1769 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1770 | { |
82d5ae15 | 1771 | struct lxc_list *iterator; |
7fa9074f | 1772 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1773 | int err; |
0ad19a3f | 1774 | |
82d5ae15 DL |
1775 | lxc_list_for_each(iterator, ip) { |
1776 | ||
1777 | inet6dev = iterator->elem; | |
1778 | ||
b3df193c | 1779 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1780 | &inet6dev->mcast, &inet6dev->acast, |
1781 | inet6dev->prefix); | |
3cfc0f3a MN |
1782 | if (err) { |
1783 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1784 | ifindex, strerror(-err)); | |
82d5ae15 | 1785 | return -1; |
3cfc0f3a | 1786 | } |
82d5ae15 DL |
1787 | } |
1788 | ||
1789 | return 0; | |
0ad19a3f | 1790 | } |
1791 | ||
82d5ae15 | 1792 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1793 | { |
0ad19a3f | 1794 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1795 | char *current_ifname = ifname; |
3cfc0f3a | 1796 | int err; |
0ad19a3f | 1797 | |
82d5ae15 DL |
1798 | /* empty network namespace */ |
1799 | if (!netdev->ifindex) { | |
b0efbac4 | 1800 | if (netdev->flags & IFF_UP) { |
d472214b | 1801 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1802 | if (err) { |
1803 | ERROR("failed to set the loopback up : %s", | |
1804 | strerror(-err)); | |
82d5ae15 DL |
1805 | return -1; |
1806 | } | |
82d5ae15 | 1807 | } |
7b57e8b6 | 1808 | return 0; |
0ad19a3f | 1809 | } |
13954cce | 1810 | |
82d5ae15 DL |
1811 | /* retrieve the name of the interface */ |
1812 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1813 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1814 | netdev->ifindex); |
0ad19a3f | 1815 | return -1; |
1816 | } | |
13954cce | 1817 | |
018ef520 | 1818 | /* default: let the system to choose one interface name */ |
9d083402 | 1819 | if (!netdev->name) |
fb6d9b2f DL |
1820 | netdev->name = netdev->type == LXC_NET_PHYS ? |
1821 | netdev->link : "eth%d"; | |
018ef520 | 1822 | |
82d5ae15 | 1823 | /* rename the interface name */ |
b84f58b9 | 1824 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
1825 | if (err) { |
1826 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1827 | strerror(-err)); | |
018ef520 DL |
1828 | return -1; |
1829 | } | |
1830 | ||
1831 | /* Re-read the name of the interface because its name has changed | |
1832 | * and would be automatically allocated by the system | |
1833 | */ | |
82d5ae15 | 1834 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1835 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1836 | netdev->ifindex); |
018ef520 | 1837 | return -1; |
0ad19a3f | 1838 | } |
1839 | ||
82d5ae15 DL |
1840 | /* set a mac address */ |
1841 | if (netdev->hwaddr) { | |
1842 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1843 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1844 | current_ifname); |
0ad19a3f | 1845 | return -1; |
1846 | } | |
1847 | } | |
1848 | ||
82d5ae15 DL |
1849 | /* setup ipv4 addresses on the interface */ |
1850 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1851 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1852 | ifname); |
1853 | return -1; | |
1854 | } | |
1855 | ||
82d5ae15 DL |
1856 | /* setup ipv6 addresses on the interface */ |
1857 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1858 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1859 | ifname); |
1860 | return -1; | |
1861 | } | |
1862 | ||
82d5ae15 | 1863 | /* set the network device up */ |
b0efbac4 | 1864 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1865 | int err; |
1866 | ||
d472214b | 1867 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
1868 | if (err) { |
1869 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1870 | strerror(-err)); | |
0ad19a3f | 1871 | return -1; |
1872 | } | |
1873 | ||
1874 | /* the network is up, make the loopback up too */ | |
d472214b | 1875 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1876 | if (err) { |
1877 | ERROR("failed to set the loopback up : %s", | |
1878 | strerror(-err)); | |
0ad19a3f | 1879 | return -1; |
1880 | } | |
1881 | } | |
1882 | ||
f8fee0e2 MK |
1883 | /* We can only set up the default routes after bringing |
1884 | * up the interface, sine bringing up the interface adds | |
1885 | * the link-local routes and we can't add a default | |
1886 | * route if the gateway is not reachable. */ | |
1887 | ||
1888 | /* setup ipv4 gateway on the interface */ | |
1889 | if (netdev->ipv4_gateway) { | |
1890 | if (!(netdev->flags & IFF_UP)) { | |
1891 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
1892 | return -1; | |
1893 | } | |
1894 | ||
1895 | if (lxc_list_empty(&netdev->ipv4)) { | |
1896 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
1897 | return -1; | |
1898 | } | |
1899 | ||
1900 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
1901 | if (err) { | |
1902 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
1903 | ifname, strerror(-err)); | |
19a26f82 MK |
1904 | if (netdev->ipv4_gateway_auto) { |
1905 | char buf[INET_ADDRSTRLEN]; | |
1906 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
1907 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
1908 | } | |
f8fee0e2 MK |
1909 | return -1; |
1910 | } | |
1911 | } | |
1912 | ||
1913 | /* setup ipv6 gateway on the interface */ | |
1914 | if (netdev->ipv6_gateway) { | |
1915 | if (!(netdev->flags & IFF_UP)) { | |
1916 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
1917 | return -1; | |
1918 | } | |
1919 | ||
1920 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
1921 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
1922 | return -1; | |
1923 | } | |
1924 | ||
1925 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
1926 | if (err) { | |
1927 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
1928 | ifname, strerror(-err)); | |
19a26f82 MK |
1929 | if (netdev->ipv6_gateway_auto) { |
1930 | char buf[INET6_ADDRSTRLEN]; | |
72d0e1cb | 1931 | inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); |
19a26f82 MK |
1932 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); |
1933 | } | |
f8fee0e2 MK |
1934 | return -1; |
1935 | } | |
1936 | } | |
1937 | ||
cd54d859 DL |
1938 | DEBUG("'%s' has been setup", current_ifname); |
1939 | ||
0ad19a3f | 1940 | return 0; |
1941 | } | |
1942 | ||
5f4535a3 | 1943 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1944 | { |
82d5ae15 | 1945 | struct lxc_list *iterator; |
82d5ae15 | 1946 | struct lxc_netdev *netdev; |
0ad19a3f | 1947 | |
5f4535a3 | 1948 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1949 | |
5f4535a3 | 1950 | netdev = iterator->elem; |
82d5ae15 DL |
1951 | |
1952 | if (setup_netdev(netdev)) { | |
1953 | ERROR("failed to setup netdev"); | |
1954 | return -1; | |
1955 | } | |
1956 | } | |
cd54d859 | 1957 | |
5f4535a3 DL |
1958 | if (!lxc_list_empty(network)) |
1959 | INFO("network has been setup"); | |
cd54d859 DL |
1960 | |
1961 | return 0; | |
0ad19a3f | 1962 | } |
1963 | ||
7b35f3d6 SH |
1964 | void lxc_rename_phys_nics_on_shutdown(struct lxc_conf *conf) |
1965 | { | |
1966 | int i; | |
1967 | ||
1968 | INFO("running to reset %d nic names", conf->num_savednics); | |
1969 | for (i=0; i<conf->num_savednics; i++) { | |
1970 | struct saved_nic *s = &conf->saved_nics[i]; | |
1971 | INFO("resetting nic %d to %s\n", s->ifindex, s->orig_name); | |
1972 | lxc_netdev_rename_by_index(s->ifindex, s->orig_name); | |
1973 | free(s->orig_name); | |
1974 | } | |
1975 | conf->num_savednics = 0; | |
1976 | free(conf->saved_nics); | |
1977 | } | |
1978 | ||
49684c0b CS |
1979 | static int setup_private_host_hw_addr(char *veth1) |
1980 | { | |
1981 | struct ifreq ifr; | |
1982 | int err; | |
1983 | int sockfd; | |
1984 | ||
1985 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
1986 | if (sockfd < 0) | |
1987 | return -errno; | |
1988 | ||
1989 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
1990 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
1991 | if (err < 0) { | |
1992 | close(sockfd); | |
1993 | return -errno; | |
1994 | } | |
1995 | ||
1996 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
1997 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
1998 | close(sockfd); | |
1999 | if (err < 0) | |
2000 | return -errno; | |
2001 | ||
7ad84da7 DL |
2002 | DEBUG("mac address of host interface '%s' changed to private " |
2003 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
2004 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
2005 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
2006 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
2007 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
2008 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
2009 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
2010 | |
2011 | return 0; | |
2012 | } | |
2013 | ||
ae9242c8 SH |
2014 | static char *default_rootfs_mount = LXCROOTFSMOUNT; |
2015 | ||
7b379ab3 | 2016 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 2017 | { |
7b379ab3 | 2018 | struct lxc_conf *new; |
26ddeedd | 2019 | int i; |
7b379ab3 MN |
2020 | |
2021 | new = malloc(sizeof(*new)); | |
2022 | if (!new) { | |
2023 | ERROR("lxc_conf_init : %m"); | |
2024 | return NULL; | |
2025 | } | |
2026 | memset(new, 0, sizeof(*new)); | |
2027 | ||
cccc74b5 | 2028 | new->personality = -1; |
596a818d DE |
2029 | new->console.log_path = NULL; |
2030 | new->console.log_fd = -1; | |
28a4b0e5 | 2031 | new->console.path = NULL; |
63376d7d DL |
2032 | new->console.peer = -1; |
2033 | new->console.master = -1; | |
2034 | new->console.slave = -1; | |
2035 | new->console.name[0] = '\0'; | |
d2e30e99 | 2036 | new->maincmd_fd = -1; |
ae9242c8 | 2037 | new->rootfs.mount = default_rootfs_mount; |
4a85ce2a | 2038 | new->loglevel = LXC_LOG_PRIORITY_NOTSET; |
7b379ab3 MN |
2039 | lxc_list_init(&new->cgroup); |
2040 | lxc_list_init(&new->network); | |
2041 | lxc_list_init(&new->mount_list); | |
81810dd1 | 2042 | lxc_list_init(&new->caps); |
26ddeedd SH |
2043 | for (i=0; i<NUM_LXC_HOOKS; i++) |
2044 | lxc_list_init(&new->hooks[i]); | |
e075f5d9 SH |
2045 | #if HAVE_APPARMOR |
2046 | new->aa_profile = NULL; | |
2047 | #endif | |
2048 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ | |
2049 | new->lsm_umount_proc = 0; | |
2050 | #endif | |
7b379ab3 MN |
2051 | |
2052 | return new; | |
089cd8b8 DL |
2053 | } |
2054 | ||
e3b4c4c4 | 2055 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2056 | { |
8634bc19 | 2057 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 2058 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 2059 | int err; |
13954cce | 2060 | |
e892973e DL |
2061 | if (netdev->priv.veth_attr.pair) |
2062 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 | 2063 | else { |
9ba8130c SH |
2064 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); |
2065 | if (err >= sizeof(veth1buf)) { /* can't *really* happen, but... */ | |
2066 | ERROR("veth1 name too long"); | |
2067 | return -1; | |
2068 | } | |
0e391e57 | 2069 | veth1 = mktemp(veth1buf); |
74a2b586 JK |
2070 | /* store away for deconf */ |
2071 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
8634bc19 | 2072 | } |
82d5ae15 | 2073 | |
0e391e57 DL |
2074 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
2075 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
2076 | |
2077 | if (!strlen(veth1) || !strlen(veth2)) { | |
2078 | ERROR("failed to allocate a temporary name"); | |
2079 | return -1; | |
0ad19a3f | 2080 | } |
2081 | ||
3cfc0f3a MN |
2082 | err = lxc_veth_create(veth1, veth2); |
2083 | if (err) { | |
2084 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
2085 | strerror(-err)); | |
6ab9ab6d | 2086 | return -1; |
0ad19a3f | 2087 | } |
13954cce | 2088 | |
49684c0b CS |
2089 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
2090 | * will always keep the host's mac address and not take the mac address | |
2091 | * of a container */ | |
2092 | err = setup_private_host_hw_addr(veth1); | |
2093 | if (err) { | |
2094 | ERROR("failed to change mac address of host interface '%s' : %s", | |
2095 | veth1, strerror(-err)); | |
2096 | goto out_delete; | |
2097 | } | |
2098 | ||
82d5ae15 | 2099 | if (netdev->mtu) { |
d472214b | 2100 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 2101 | if (!err) |
d472214b | 2102 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
2103 | if (err) { |
2104 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
2105 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 2106 | goto out_delete; |
75d09f83 DL |
2107 | } |
2108 | } | |
2109 | ||
3cfc0f3a MN |
2110 | if (netdev->link) { |
2111 | err = lxc_bridge_attach(netdev->link, veth1); | |
2112 | if (err) { | |
2113 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
2114 | veth1, netdev->link, strerror(-err)); | |
2115 | goto out_delete; | |
2116 | } | |
eb14c10a DL |
2117 | } |
2118 | ||
82d5ae15 DL |
2119 | netdev->ifindex = if_nametoindex(veth2); |
2120 | if (!netdev->ifindex) { | |
36eb9bde | 2121 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
2122 | goto out_delete; |
2123 | } | |
2124 | ||
d472214b | 2125 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
2126 | if (err) { |
2127 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
2128 | goto out_delete; | |
0ad19a3f | 2129 | } |
2130 | ||
e3b4c4c4 | 2131 | if (netdev->upscript) { |
751d9dcd DL |
2132 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2133 | "veth", veth1, (char*) NULL); | |
2134 | if (err) | |
e3b4c4c4 | 2135 | goto out_delete; |
e3b4c4c4 ST |
2136 | } |
2137 | ||
82d5ae15 DL |
2138 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
2139 | veth1, veth2, netdev->ifindex); | |
2140 | ||
6ab9ab6d | 2141 | return 0; |
eb14c10a DL |
2142 | |
2143 | out_delete: | |
b84f58b9 | 2144 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 2145 | return -1; |
13954cce | 2146 | } |
d957ae2d | 2147 | |
74a2b586 JK |
2148 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2149 | { | |
2150 | char *veth1; | |
2151 | int err; | |
2152 | ||
2153 | if (netdev->priv.veth_attr.pair) | |
2154 | veth1 = netdev->priv.veth_attr.pair; | |
2155 | else | |
2156 | veth1 = netdev->priv.veth_attr.veth1; | |
2157 | ||
2158 | if (netdev->downscript) { | |
2159 | err = run_script(handler->name, "net", netdev->downscript, | |
2160 | "down", "veth", veth1, (char*) NULL); | |
2161 | if (err) | |
2162 | return -1; | |
2163 | } | |
2164 | return 0; | |
2165 | } | |
2166 | ||
e3b4c4c4 | 2167 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2168 | { |
0e391e57 | 2169 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 2170 | int err; |
d957ae2d MT |
2171 | |
2172 | if (!netdev->link) { | |
2173 | ERROR("no link specified for macvlan netdev"); | |
2174 | return -1; | |
2175 | } | |
13954cce | 2176 | |
9ba8130c SH |
2177 | err = snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
2178 | if (err >= sizeof(peerbuf)) | |
2179 | return -1; | |
82d5ae15 | 2180 | |
0e391e57 | 2181 | peer = mktemp(peerbuf); |
82d5ae15 DL |
2182 | if (!strlen(peer)) { |
2183 | ERROR("failed to make a temporary name"); | |
2184 | return -1; | |
0ad19a3f | 2185 | } |
2186 | ||
3cfc0f3a MN |
2187 | err = lxc_macvlan_create(netdev->link, peer, |
2188 | netdev->priv.macvlan_attr.mode); | |
2189 | if (err) { | |
2190 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
2191 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 2192 | return -1; |
0ad19a3f | 2193 | } |
2194 | ||
82d5ae15 DL |
2195 | netdev->ifindex = if_nametoindex(peer); |
2196 | if (!netdev->ifindex) { | |
36eb9bde | 2197 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 2198 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 2199 | return -1; |
22ebac19 | 2200 | } |
2201 | ||
e3b4c4c4 | 2202 | if (netdev->upscript) { |
751d9dcd DL |
2203 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2204 | "macvlan", netdev->link, (char*) NULL); | |
2205 | if (err) | |
e3b4c4c4 | 2206 | return -1; |
e3b4c4c4 ST |
2207 | } |
2208 | ||
e892973e DL |
2209 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
2210 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 2211 | |
d957ae2d | 2212 | return 0; |
0ad19a3f | 2213 | } |
2214 | ||
74a2b586 JK |
2215 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2216 | { | |
2217 | int err; | |
2218 | ||
2219 | if (netdev->downscript) { | |
2220 | err = run_script(handler->name, "net", netdev->downscript, | |
2221 | "down", "macvlan", netdev->link, | |
2222 | (char*) NULL); | |
2223 | if (err) | |
2224 | return -1; | |
2225 | } | |
2226 | return 0; | |
2227 | } | |
2228 | ||
26c39028 | 2229 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 2230 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
2231 | { |
2232 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 2233 | int err; |
26c39028 JHS |
2234 | |
2235 | if (!netdev->link) { | |
2236 | ERROR("no link specified for vlan netdev"); | |
2237 | return -1; | |
2238 | } | |
2239 | ||
9ba8130c SH |
2240 | err = snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
2241 | if (err >= sizeof(peer)) { | |
2242 | ERROR("peer name too long"); | |
2243 | return -1; | |
2244 | } | |
26c39028 | 2245 | |
3cfc0f3a MN |
2246 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
2247 | if (err) { | |
2248 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
2249 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
2250 | return -1; |
2251 | } | |
2252 | ||
2253 | netdev->ifindex = if_nametoindex(peer); | |
2254 | if (!netdev->ifindex) { | |
2255 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 2256 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
2257 | return -1; |
2258 | } | |
2259 | ||
e892973e DL |
2260 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
2261 | netdev->ifindex); | |
2262 | ||
26c39028 JHS |
2263 | return 0; |
2264 | } | |
2265 | ||
74a2b586 JK |
2266 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2267 | { | |
2268 | return 0; | |
2269 | } | |
2270 | ||
e3b4c4c4 | 2271 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2272 | { |
6168e99f DL |
2273 | if (!netdev->link) { |
2274 | ERROR("no link specified for the physical interface"); | |
2275 | return -1; | |
2276 | } | |
2277 | ||
9d083402 | 2278 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 2279 | if (!netdev->ifindex) { |
9d083402 | 2280 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 2281 | return -1; |
2282 | } | |
2283 | ||
e3b4c4c4 ST |
2284 | if (netdev->upscript) { |
2285 | int err; | |
751d9dcd DL |
2286 | err = run_script(handler->name, "net", netdev->upscript, |
2287 | "up", "phys", netdev->link, (char*) NULL); | |
2288 | if (err) | |
e3b4c4c4 | 2289 | return -1; |
e3b4c4c4 ST |
2290 | } |
2291 | ||
82d5ae15 | 2292 | return 0; |
0ad19a3f | 2293 | } |
2294 | ||
74a2b586 JK |
2295 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2296 | { | |
2297 | int err; | |
2298 | ||
2299 | if (netdev->downscript) { | |
2300 | err = run_script(handler->name, "net", netdev->downscript, | |
2301 | "down", "phys", netdev->link, (char*) NULL); | |
2302 | if (err) | |
2303 | return -1; | |
2304 | } | |
2305 | return 0; | |
2306 | } | |
2307 | ||
e3b4c4c4 | 2308 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2309 | { |
82d5ae15 | 2310 | netdev->ifindex = 0; |
e3b4c4c4 ST |
2311 | if (netdev->upscript) { |
2312 | int err; | |
751d9dcd DL |
2313 | err = run_script(handler->name, "net", netdev->upscript, |
2314 | "up", "empty", (char*) NULL); | |
2315 | if (err) | |
e3b4c4c4 | 2316 | return -1; |
e3b4c4c4 | 2317 | } |
82d5ae15 | 2318 | return 0; |
0ad19a3f | 2319 | } |
2320 | ||
74a2b586 JK |
2321 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2322 | { | |
2323 | int err; | |
2324 | ||
2325 | if (netdev->downscript) { | |
2326 | err = run_script(handler->name, "net", netdev->downscript, | |
2327 | "down", "empty", (char*) NULL); | |
2328 | if (err) | |
2329 | return -1; | |
2330 | } | |
2331 | return 0; | |
2332 | } | |
2333 | ||
e3b4c4c4 | 2334 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 2335 | { |
e3b4c4c4 | 2336 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 2337 | struct lxc_list *iterator; |
82d5ae15 | 2338 | struct lxc_netdev *netdev; |
0ad19a3f | 2339 | |
5f4535a3 | 2340 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 2341 | |
5f4535a3 | 2342 | netdev = iterator->elem; |
13954cce | 2343 | |
24654103 | 2344 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 2345 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 2346 | netdev->type); |
82d5ae15 DL |
2347 | return -1; |
2348 | } | |
0ad19a3f | 2349 | |
e3b4c4c4 | 2350 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
2351 | ERROR("failed to create netdev"); |
2352 | return -1; | |
2353 | } | |
e3b4c4c4 | 2354 | |
0ad19a3f | 2355 | } |
2356 | ||
2357 | return 0; | |
2358 | } | |
2359 | ||
74a2b586 | 2360 | void lxc_delete_network(struct lxc_handler *handler) |
7fef7a06 | 2361 | { |
74a2b586 | 2362 | struct lxc_list *network = &handler->conf->network; |
7fef7a06 DL |
2363 | struct lxc_list *iterator; |
2364 | struct lxc_netdev *netdev; | |
2365 | ||
2366 | lxc_list_for_each(iterator, network) { | |
2367 | netdev = iterator->elem; | |
d472214b | 2368 | |
74a2b586 | 2369 | if (netdev->ifindex != 0 && netdev->type == LXC_NET_PHYS) { |
d8f8e352 DL |
2370 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) |
2371 | WARN("failed to rename to the initial name the " \ | |
2372 | "netdev '%s'", netdev->link); | |
d472214b | 2373 | continue; |
d8f8e352 | 2374 | } |
d472214b | 2375 | |
74a2b586 JK |
2376 | if (netdev_deconf[netdev->type](handler, netdev)) { |
2377 | WARN("failed to destroy netdev"); | |
2378 | } | |
2379 | ||
d8f8e352 DL |
2380 | /* Recent kernel remove the virtual interfaces when the network |
2381 | * namespace is destroyed but in case we did not moved the | |
2382 | * interface to the network namespace, we have to destroy it | |
2383 | */ | |
74a2b586 JK |
2384 | if (netdev->ifindex != 0 && |
2385 | lxc_netdev_delete_by_index(netdev->ifindex)) | |
d8f8e352 | 2386 | WARN("failed to remove interface '%s'", netdev->name); |
7fef7a06 DL |
2387 | } |
2388 | } | |
2389 | ||
5f4535a3 | 2390 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 2391 | { |
82d5ae15 | 2392 | struct lxc_list *iterator; |
82d5ae15 | 2393 | struct lxc_netdev *netdev; |
3cfc0f3a | 2394 | int err; |
0ad19a3f | 2395 | |
5f4535a3 | 2396 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 2397 | |
5f4535a3 | 2398 | netdev = iterator->elem; |
82d5ae15 | 2399 | |
236087a6 DL |
2400 | /* empty network namespace, nothing to move */ |
2401 | if (!netdev->ifindex) | |
2402 | continue; | |
2403 | ||
d472214b | 2404 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
2405 | if (err) { |
2406 | ERROR("failed to move '%s' to the container : %s", | |
2407 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
2408 | return -1; |
2409 | } | |
2410 | ||
c1c75c04 | 2411 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 2412 | } |
2413 | ||
2414 | return 0; | |
2415 | } | |
2416 | ||
19a26f82 MK |
2417 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
2418 | { | |
2419 | struct lxc_list *network = &handler->conf->network; | |
2420 | struct lxc_list *iterator; | |
2421 | struct lxc_netdev *netdev; | |
2422 | int link_index; | |
2423 | ||
2424 | lxc_list_for_each(iterator, network) { | |
2425 | netdev = iterator->elem; | |
2426 | ||
2427 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2428 | continue; | |
2429 | ||
2430 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
2431 | ERROR("gateway = auto only supported for " | |
2432 | "veth and macvlan"); | |
2433 | return -1; | |
2434 | } | |
2435 | ||
2436 | if (!netdev->link) { | |
2437 | ERROR("gateway = auto needs a link interface"); | |
2438 | return -1; | |
2439 | } | |
2440 | ||
2441 | link_index = if_nametoindex(netdev->link); | |
2442 | if (!link_index) | |
2443 | return -EINVAL; | |
2444 | ||
2445 | if (netdev->ipv4_gateway_auto) { | |
2446 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
2447 | ERROR("failed to automatically find ipv4 gateway " | |
2448 | "address from link interface '%s'", netdev->link); | |
2449 | return -1; | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | if (netdev->ipv6_gateway_auto) { | |
2454 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
2455 | ERROR("failed to automatically find ipv6 gateway " | |
2456 | "address from link interface '%s'", netdev->link); | |
2457 | return -1; | |
2458 | } | |
2459 | } | |
2460 | } | |
2461 | ||
2462 | return 0; | |
2463 | } | |
2464 | ||
5e4a62bf | 2465 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 2466 | { |
5e4a62bf | 2467 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 2468 | int i; |
b0a33c1e | 2469 | |
5e4a62bf DL |
2470 | /* no tty in the configuration */ |
2471 | if (!conf->tty) | |
b0a33c1e | 2472 | return 0; |
2473 | ||
13954cce | 2474 | tty_info->pty_info = |
e4e7d59d | 2475 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 2476 | if (!tty_info->pty_info) { |
36eb9bde | 2477 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 2478 | return -1; |
b0a33c1e | 2479 | } |
2480 | ||
985d15b1 | 2481 | for (i = 0; i < conf->tty; i++) { |
13954cce | 2482 | |
b0a33c1e | 2483 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
2484 | ||
13954cce | 2485 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 2486 | pty_info->name, NULL, NULL)) { |
36eb9bde | 2487 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
2488 | tty_info->nbtty = i; |
2489 | lxc_delete_tty(tty_info); | |
2490 | return -1; | |
b0a33c1e | 2491 | } |
2492 | ||
5332bb84 DL |
2493 | DEBUG("allocated pty '%s' (%d/%d)", |
2494 | pty_info->name, pty_info->master, pty_info->slave); | |
2495 | ||
b035ad62 MS |
2496 | /* Prevent leaking the file descriptors to the container */ |
2497 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
2498 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
2499 | ||
b0a33c1e | 2500 | pty_info->busy = 0; |
2501 | } | |
2502 | ||
985d15b1 | 2503 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
2504 | |
2505 | INFO("tty's configured"); | |
2506 | ||
985d15b1 | 2507 | return 0; |
b0a33c1e | 2508 | } |
2509 | ||
2510 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
2511 | { | |
2512 | int i; | |
2513 | ||
2514 | for (i = 0; i < tty_info->nbtty; i++) { | |
2515 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
2516 | ||
2517 | close(pty_info->master); | |
2518 | close(pty_info->slave); | |
2519 | } | |
2520 | ||
2521 | free(tty_info->pty_info); | |
2522 | tty_info->nbtty = 0; | |
2523 | } | |
2524 | ||
571e6ec8 | 2525 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 2526 | { |
e075f5d9 SH |
2527 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
2528 | int mounted; | |
2529 | #endif | |
2530 | ||
571e6ec8 | 2531 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 2532 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 2533 | return -1; |
0ad19a3f | 2534 | } |
2535 | ||
5f4535a3 | 2536 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 2537 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 2538 | return -1; |
0ad19a3f | 2539 | } |
2540 | ||
89eaa05e SH |
2541 | if (run_lxc_hooks(name, "pre-mount", lxc_conf)) { |
2542 | ERROR("failed to run pre-mount hooks for container '%s'.", name); | |
2543 | return -1; | |
2544 | } | |
5ea6163a | 2545 | |
cc28d0b0 | 2546 | if (setup_rootfs(lxc_conf)) { |
ac778708 | 2547 | ERROR("failed to setup rootfs for '%s'", name); |
95b5ffaf | 2548 | return -1; |
0ad19a3f | 2549 | } |
2550 | ||
c6883f38 | 2551 | if (lxc_conf->autodev) { |
91c3830e SH |
2552 | if (mount_autodev(lxc_conf->rootfs.mount)) { |
2553 | ERROR("failed to mount /dev in the container"); | |
c6883f38 SH |
2554 | return -1; |
2555 | } | |
2556 | } | |
2557 | ||
80a881b2 | 2558 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab, name)) { |
36eb9bde | 2559 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2560 | return -1; |
576f946d | 2561 | } |
2562 | ||
80a881b2 | 2563 | if (setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list, name)) { |
e7938e9e MN |
2564 | ERROR("failed to setup the mount entries for '%s'", name); |
2565 | return -1; | |
2566 | } | |
2567 | ||
773fb9ca SH |
2568 | if (run_lxc_hooks(name, "mount", lxc_conf)) { |
2569 | ERROR("failed to run mount hooks for container '%s'.", name); | |
2570 | return -1; | |
2571 | } | |
2572 | ||
91c3830e SH |
2573 | if (lxc_conf->autodev) { |
2574 | if (setup_autodev(lxc_conf->rootfs.mount)) { | |
2575 | ERROR("failed to populate /dev in the container"); | |
2576 | return -1; | |
2577 | } | |
2578 | } | |
2579 | ||
ac778708 DL |
2580 | if (setup_cgroup(name, &lxc_conf->cgroup)) { |
2581 | ERROR("failed to setup the cgroups for '%s'", name); | |
2582 | return -1; | |
2583 | } | |
2584 | ||
7c6ef2a2 | 2585 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2586 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2587 | return -1; |
6e590161 | 2588 | } |
2589 | ||
f62b3449 | 2590 | if (setup_kmsg(&lxc_conf->rootfs, &lxc_conf->console)) // don't fail |
1bd051a6 | 2591 | ERROR("failed to setup kmsg for '%s'", name); |
1bd051a6 | 2592 | |
7c6ef2a2 | 2593 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2594 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2595 | return -1; |
b0a33c1e | 2596 | } |
2597 | ||
e075f5d9 | 2598 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
9ac3ffb5 SG |
2599 | INFO("rootfs path is .%s., mount is .%s.", lxc_conf->rootfs.path, |
2600 | lxc_conf->rootfs.mount); | |
2601 | if (lxc_conf->rootfs.path == NULL || strlen(lxc_conf->rootfs.path) == 0) | |
2602 | mounted = 0; | |
2603 | else | |
2604 | mounted = lsm_mount_proc_if_needed(lxc_conf->rootfs.path, lxc_conf->rootfs.mount); | |
e075f5d9 SH |
2605 | if (mounted == -1) { |
2606 | SYSERROR("failed to mount /proc in the container."); | |
2607 | return -1; | |
2608 | } else if (mounted == 1) { | |
2609 | lxc_conf->lsm_umount_proc = 1; | |
2610 | } | |
2611 | #endif | |
2612 | ||
ac778708 | 2613 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2614 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2615 | return -1; |
ed502555 | 2616 | } |
2617 | ||
571e6ec8 | 2618 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2619 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2620 | return -1; |
3c26f34e | 2621 | } |
2622 | ||
cccc74b5 DL |
2623 | if (setup_personality(lxc_conf->personality)) { |
2624 | ERROR("failed to setup personality"); | |
2625 | return -1; | |
2626 | } | |
2627 | ||
81810dd1 DL |
2628 | if (setup_caps(&lxc_conf->caps)) { |
2629 | ERROR("failed to drop capabilities"); | |
2630 | return -1; | |
2631 | } | |
2632 | ||
cd54d859 DL |
2633 | NOTICE("'%s' is setup.", name); |
2634 | ||
0ad19a3f | 2635 | return 0; |
2636 | } | |
26ddeedd SH |
2637 | |
2638 | int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf) | |
2639 | { | |
2640 | int which = -1; | |
2641 | struct lxc_list *it; | |
2642 | ||
2643 | if (strcmp(hook, "pre-start") == 0) | |
2644 | which = LXCHOOK_PRESTART; | |
5ea6163a SH |
2645 | else if (strcmp(hook, "pre-mount") == 0) |
2646 | which = LXCHOOK_PREMOUNT; | |
26ddeedd SH |
2647 | else if (strcmp(hook, "mount") == 0) |
2648 | which = LXCHOOK_MOUNT; | |
2649 | else if (strcmp(hook, "start") == 0) | |
2650 | which = LXCHOOK_START; | |
2651 | else if (strcmp(hook, "post-stop") == 0) | |
2652 | which = LXCHOOK_POSTSTOP; | |
2653 | else | |
2654 | return -1; | |
2655 | lxc_list_for_each(it, &conf->hooks[which]) { | |
2656 | int ret; | |
2657 | char *hookname = it->elem; | |
2658 | ret = run_script(name, "lxc", hookname, hook, NULL); | |
2659 | if (ret) | |
2660 | return ret; | |
2661 | } | |
2662 | return 0; | |
2663 | } | |
72d0e1cb | 2664 | |
427b3a21 | 2665 | static void lxc_remove_nic(struct lxc_list *it) |
72d0e1cb SG |
2666 | { |
2667 | struct lxc_netdev *netdev = it->elem; | |
9ebb03ad | 2668 | struct lxc_list *it2,*next; |
72d0e1cb SG |
2669 | |
2670 | lxc_list_del(it); | |
2671 | ||
2672 | if (netdev->link) | |
2673 | free(netdev->link); | |
2674 | if (netdev->name) | |
2675 | free(netdev->name); | |
2676 | if (netdev->upscript) | |
2677 | free(netdev->upscript); | |
2678 | if (netdev->hwaddr) | |
2679 | free(netdev->hwaddr); | |
2680 | if (netdev->mtu) | |
2681 | free(netdev->mtu); | |
2682 | if (netdev->ipv4_gateway) | |
2683 | free(netdev->ipv4_gateway); | |
2684 | if (netdev->ipv6_gateway) | |
2685 | free(netdev->ipv6_gateway); | |
9ebb03ad | 2686 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { |
72d0e1cb SG |
2687 | lxc_list_del(it2); |
2688 | free(it2->elem); | |
2689 | free(it2); | |
2690 | } | |
9ebb03ad | 2691 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { |
72d0e1cb SG |
2692 | lxc_list_del(it2); |
2693 | free(it2->elem); | |
2694 | free(it2); | |
2695 | } | |
d95db067 | 2696 | free(netdev); |
72d0e1cb SG |
2697 | free(it); |
2698 | } | |
2699 | ||
2700 | /* we get passed in something like '0', '0.ipv4' or '1.ipv6' */ | |
12a50cc6 | 2701 | int lxc_clear_nic(struct lxc_conf *c, const char *key) |
72d0e1cb SG |
2702 | { |
2703 | char *p1; | |
2704 | int ret, idx, i; | |
2705 | struct lxc_list *it; | |
2706 | struct lxc_netdev *netdev; | |
2707 | ||
2708 | p1 = index(key, '.'); | |
2709 | if (!p1 || *(p1+1) == '\0') | |
2710 | p1 = NULL; | |
2711 | ||
2712 | ret = sscanf(key, "%d", &idx); | |
2713 | if (ret != 1) return -1; | |
2714 | if (idx < 0) | |
2715 | return -1; | |
2716 | ||
2717 | i = 0; | |
2718 | lxc_list_for_each(it, &c->network) { | |
2719 | if (i == idx) | |
2720 | break; | |
2721 | i++; | |
2722 | } | |
2723 | if (i < idx) // we don't have that many nics defined | |
2724 | return -1; | |
2725 | ||
2726 | if (!it || !it->elem) | |
2727 | return -1; | |
2728 | ||
2729 | netdev = it->elem; | |
2730 | ||
2731 | if (!p1) { | |
2732 | lxc_remove_nic(it); | |
2733 | } else if (strcmp(p1, "ipv4") == 0) { | |
9ebb03ad DE |
2734 | struct lxc_list *it2,*next; |
2735 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { | |
72d0e1cb SG |
2736 | lxc_list_del(it2); |
2737 | free(it2->elem); | |
2738 | free(it2); | |
2739 | } | |
2740 | } else if (strcmp(p1, "ipv6") == 0) { | |
9ebb03ad DE |
2741 | struct lxc_list *it2,*next; |
2742 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { | |
72d0e1cb SG |
2743 | lxc_list_del(it2); |
2744 | free(it2->elem); | |
2745 | free(it2); | |
2746 | } | |
2747 | } else if (strcmp(p1, "link") == 0) { | |
2748 | if (netdev->link) { | |
2749 | free(netdev->link); | |
2750 | netdev->link = NULL; | |
2751 | } | |
2752 | } else if (strcmp(p1, "name") == 0) { | |
2753 | if (netdev->name) { | |
2754 | free(netdev->name); | |
2755 | netdev->name = NULL; | |
2756 | } | |
2757 | } else if (strcmp(p1, "script.up") == 0) { | |
2758 | if (netdev->upscript) { | |
2759 | free(netdev->upscript); | |
2760 | netdev->upscript = NULL; | |
2761 | } | |
2762 | } else if (strcmp(p1, "hwaddr") == 0) { | |
2763 | if (netdev->hwaddr) { | |
2764 | free(netdev->hwaddr); | |
2765 | netdev->hwaddr = NULL; | |
2766 | } | |
2767 | } else if (strcmp(p1, "mtu") == 0) { | |
2768 | if (netdev->mtu) { | |
2769 | free(netdev->mtu); | |
2770 | netdev->mtu = NULL; | |
2771 | } | |
2772 | } else if (strcmp(p1, "ipv4_gateway") == 0) { | |
2773 | if (netdev->ipv4_gateway) { | |
2774 | free(netdev->ipv4_gateway); | |
2775 | netdev->ipv4_gateway = NULL; | |
2776 | } | |
2777 | } else if (strcmp(p1, "ipv6_gateway") == 0) { | |
2778 | if (netdev->ipv6_gateway) { | |
2779 | free(netdev->ipv6_gateway); | |
2780 | netdev->ipv6_gateway = NULL; | |
2781 | } | |
2782 | } | |
2783 | else return -1; | |
2784 | ||
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | int lxc_clear_config_network(struct lxc_conf *c) | |
2789 | { | |
9ebb03ad DE |
2790 | struct lxc_list *it,*next; |
2791 | lxc_list_for_each_safe(it, &c->network, next) { | |
72d0e1cb SG |
2792 | lxc_remove_nic(it); |
2793 | } | |
2794 | return 0; | |
2795 | } | |
2796 | ||
2797 | int lxc_clear_config_caps(struct lxc_conf *c) | |
2798 | { | |
9ebb03ad | 2799 | struct lxc_list *it,*next; |
72d0e1cb | 2800 | |
9ebb03ad | 2801 | lxc_list_for_each_safe(it, &c->caps, next) { |
72d0e1cb SG |
2802 | lxc_list_del(it); |
2803 | free(it->elem); | |
2804 | free(it); | |
2805 | } | |
2806 | return 0; | |
2807 | } | |
2808 | ||
12a50cc6 | 2809 | int lxc_clear_cgroups(struct lxc_conf *c, const char *key) |
72d0e1cb | 2810 | { |
9ebb03ad | 2811 | struct lxc_list *it,*next; |
72d0e1cb | 2812 | bool all = false; |
12a50cc6 | 2813 | const char *k = key + 11; |
72d0e1cb SG |
2814 | |
2815 | if (strcmp(key, "lxc.cgroup") == 0) | |
2816 | all = true; | |
2817 | ||
9ebb03ad | 2818 | lxc_list_for_each_safe(it, &c->cgroup, next) { |
72d0e1cb SG |
2819 | struct lxc_cgroup *cg = it->elem; |
2820 | if (!all && strcmp(cg->subsystem, k) != 0) | |
2821 | continue; | |
2822 | lxc_list_del(it); | |
2823 | free(cg->subsystem); | |
2824 | free(cg->value); | |
2825 | free(cg); | |
2826 | free(it); | |
2827 | } | |
2828 | return 0; | |
2829 | } | |
2830 | ||
2831 | int lxc_clear_mount_entries(struct lxc_conf *c) | |
2832 | { | |
9ebb03ad | 2833 | struct lxc_list *it,*next; |
72d0e1cb | 2834 | |
9ebb03ad | 2835 | lxc_list_for_each_safe(it, &c->mount_list, next) { |
72d0e1cb SG |
2836 | lxc_list_del(it); |
2837 | free(it->elem); | |
2838 | free(it); | |
2839 | } | |
2840 | return 0; | |
2841 | } | |
2842 | ||
12a50cc6 | 2843 | int lxc_clear_hooks(struct lxc_conf *c, const char *key) |
72d0e1cb | 2844 | { |
9ebb03ad | 2845 | struct lxc_list *it,*next; |
17ed13a3 | 2846 | bool all = false, done = false; |
12a50cc6 | 2847 | const char *k = key + 9; |
72d0e1cb SG |
2848 | int i; |
2849 | ||
17ed13a3 SH |
2850 | if (strcmp(key, "lxc.hook") == 0) |
2851 | all = true; | |
2852 | ||
72d0e1cb | 2853 | for (i=0; i<NUM_LXC_HOOKS; i++) { |
17ed13a3 | 2854 | if (all || strcmp(k, lxchook_names[i]) == 0) { |
9ebb03ad | 2855 | lxc_list_for_each_safe(it, &c->hooks[i], next) { |
17ed13a3 SH |
2856 | lxc_list_del(it); |
2857 | free(it->elem); | |
2858 | free(it); | |
2859 | } | |
2860 | done = true; | |
72d0e1cb SG |
2861 | } |
2862 | } | |
17ed13a3 SH |
2863 | |
2864 | if (!done) { | |
2865 | ERROR("Invalid hook key: %s", key); | |
2866 | return -1; | |
2867 | } | |
72d0e1cb SG |
2868 | return 0; |
2869 | } | |
8eb5694b | 2870 | |
7b35f3d6 SH |
2871 | void lxc_clear_saved_nics(struct lxc_conf *conf) |
2872 | { | |
2873 | int i; | |
2874 | ||
2875 | if (!conf->num_savednics) | |
2876 | return; | |
2877 | for (i=0; i < conf->num_savednics; i++) | |
2878 | free(conf->saved_nics[i].orig_name); | |
2879 | conf->saved_nics = 0; | |
2880 | free(conf->saved_nics); | |
2881 | } | |
2882 | ||
8eb5694b SH |
2883 | void lxc_conf_free(struct lxc_conf *conf) |
2884 | { | |
2885 | if (!conf) | |
2886 | return; | |
2887 | if (conf->console.path) | |
2888 | free(conf->console.path); | |
ae9242c8 | 2889 | if (conf->rootfs.mount != default_rootfs_mount) |
8eb5694b | 2890 | free(conf->rootfs.mount); |
d95db067 DE |
2891 | if (conf->rootfs.path) |
2892 | free(conf->rootfs.path); | |
2893 | if (conf->utsname) | |
2894 | free(conf->utsname); | |
2895 | if (conf->ttydir) | |
2896 | free(conf->ttydir); | |
2897 | if (conf->fstab) | |
2898 | free(conf->fstab); | |
4a85ce2a SH |
2899 | if (conf->logfile) |
2900 | free(conf->logfile); | |
8eb5694b | 2901 | lxc_clear_config_network(conf); |
1f530df6 | 2902 | #if HAVE_APPARMOR |
8eb5694b SH |
2903 | if (conf->aa_profile) |
2904 | free(conf->aa_profile); | |
1f530df6 | 2905 | #endif |
769872f9 | 2906 | lxc_seccomp_free(conf); |
8eb5694b SH |
2907 | lxc_clear_config_caps(conf); |
2908 | lxc_clear_cgroups(conf, "lxc.cgroup"); | |
17ed13a3 | 2909 | lxc_clear_hooks(conf, "lxc.hook"); |
8eb5694b | 2910 | lxc_clear_mount_entries(conf); |
7b35f3d6 | 2911 | lxc_clear_saved_nics(conf); |
8eb5694b SH |
2912 | free(conf); |
2913 | } |