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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: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ad19a3f | 8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #define _GNU_SOURCE | |
24 | #include <stdio.h> | |
25 | #undef _GNU_SOURCE | |
26 | #include <stdlib.h> | |
e3b4c4c4 | 27 | #include <stdarg.h> |
0ad19a3f | 28 | #include <errno.h> |
29 | #include <string.h> | |
30 | #include <dirent.h> | |
0ad19a3f | 31 | #include <unistd.h> |
e3b4c4c4 | 32 | #include <sys/wait.h> |
2d76d1d7 | 33 | #include <sys/syscall.h> |
e827ff7e SG |
34 | |
35 | #if HAVE_PTY_H | |
b0a33c1e | 36 | #include <pty.h> |
e827ff7e SG |
37 | #else |
38 | #include <../include/openpty.h> | |
39 | #endif | |
0ad19a3f | 40 | |
b3ecde1e DL |
41 | #include <linux/loop.h> |
42 | ||
0ad19a3f | 43 | #include <sys/types.h> |
44 | #include <sys/utsname.h> | |
45 | #include <sys/param.h> | |
46 | #include <sys/stat.h> | |
47 | #include <sys/socket.h> | |
48 | #include <sys/mount.h> | |
49 | #include <sys/mman.h> | |
81810dd1 | 50 | #include <sys/prctl.h> |
0ad19a3f | 51 | |
52 | #include <arpa/inet.h> | |
53 | #include <fcntl.h> | |
54 | #include <netinet/in.h> | |
55 | #include <net/if.h> | |
6f4a3756 | 56 | #include <libgen.h> |
0ad19a3f | 57 | |
e5bda9ee | 58 | #include "network.h" |
59 | #include "error.h" | |
b2718c72 | 60 | #include "parse.h" |
881450bb | 61 | #include "config.h" |
1b09f2c0 DL |
62 | #include "utils.h" |
63 | #include "conf.h" | |
64 | #include "log.h" | |
65 | #include "lxc.h" /* for lxc_cgroup_set() */ | |
d55bc1ad | 66 | #include "caps.h" /* for lxc_caps_last_cap() */ |
36eb9bde | 67 | |
d0a36f2c SG |
68 | #if HAVE_APPARMOR |
69 | #include <apparmor.h> | |
70 | #endif | |
71 | ||
495d2046 SG |
72 | #if HAVE_SYS_CAPABILITY_H |
73 | #include <sys/capability.h> | |
74 | #endif | |
75 | ||
6ff05e18 SG |
76 | #if HAVE_SYS_PERSONALITY_H |
77 | #include <sys/personality.h> | |
78 | #endif | |
79 | ||
edaf8b1b SG |
80 | #if IS_BIONIC |
81 | #include <../include/lxcmntent.h> | |
82 | #else | |
83 | #include <mntent.h> | |
84 | #endif | |
85 | ||
769872f9 SH |
86 | #include "lxcseccomp.h" |
87 | ||
36eb9bde | 88 | lxc_log_define(lxc_conf, lxc); |
e5bda9ee | 89 | |
0ad19a3f | 90 | #define MAXHWLEN 18 |
91 | #define MAXINDEXLEN 20 | |
442cbbe6 | 92 | #define MAXMTULEN 16 |
0ad19a3f | 93 | #define MAXLINELEN 128 |
94 | ||
968fbd36 SK |
95 | #ifndef MS_DIRSYNC |
96 | #define MS_DIRSYNC 128 | |
97 | #endif | |
98 | ||
fdc03323 DL |
99 | #ifndef MS_REC |
100 | #define MS_REC 16384 | |
101 | #endif | |
102 | ||
c08556c6 DL |
103 | #ifndef MNT_DETACH |
104 | #define MNT_DETACH 2 | |
105 | #endif | |
106 | ||
859a6da0 NC |
107 | #ifndef MS_SLAVE |
108 | #define MS_SLAVE (1<<19) | |
109 | #endif | |
110 | ||
88d413d5 SW |
111 | #ifndef MS_RELATIME |
112 | #define MS_RELATIME (1 << 21) | |
113 | #endif | |
114 | ||
115 | #ifndef MS_STRICTATIME | |
116 | #define MS_STRICTATIME (1 << 24) | |
117 | #endif | |
118 | ||
495d2046 | 119 | #if HAVE_SYS_CAPABILITY_H |
b09094da MN |
120 | #ifndef CAP_SETFCAP |
121 | #define CAP_SETFCAP 31 | |
122 | #endif | |
123 | ||
124 | #ifndef CAP_MAC_OVERRIDE | |
125 | #define CAP_MAC_OVERRIDE 32 | |
126 | #endif | |
127 | ||
128 | #ifndef CAP_MAC_ADMIN | |
129 | #define CAP_MAC_ADMIN 33 | |
130 | #endif | |
495d2046 | 131 | #endif |
b09094da MN |
132 | |
133 | #ifndef PR_CAPBSET_DROP | |
134 | #define PR_CAPBSET_DROP 24 | |
135 | #endif | |
136 | ||
9818cae4 SG |
137 | #ifndef LO_FLAGS_AUTOCLEAR |
138 | #define LO_FLAGS_AUTOCLEAR 4 | |
139 | #endif | |
140 | ||
2d76d1d7 SG |
141 | /* Define pivot_root() if missing from the C library */ |
142 | #ifndef HAVE_PIVOT_ROOT | |
143 | static int pivot_root(const char * new_root, const char * put_old) | |
144 | { | |
145 | #ifdef __NR_pivot_root | |
146 | return syscall(__NR_pivot_root, new_root, put_old); | |
147 | #else | |
148 | errno = ENOSYS; | |
149 | return -1; | |
150 | #endif | |
151 | } | |
152 | #else | |
153 | extern int pivot_root(const char * new_root, const char * put_old); | |
154 | #endif | |
155 | ||
156 | /* Define sethostname() if missing from the C library */ | |
157 | #ifndef HAVE_SETHOSTNAME | |
158 | static int sethostname(const char * name, size_t len) | |
159 | { | |
160 | #ifdef __NR_sethostname | |
161 | return syscall(__NR_sethostname, name, len); | |
162 | #else | |
163 | errno = ENOSYS; | |
164 | return -1; | |
165 | #endif | |
166 | } | |
167 | #endif | |
168 | ||
72f919c4 SG |
169 | /* Define __S_ISTYPE if missing from the C library */ |
170 | #ifndef __S_ISTYPE | |
171 | #define __S_ISTYPE(mode, mask) (((mode) & S_IFMT) == (mask)) | |
172 | #endif | |
173 | ||
72d0e1cb | 174 | char *lxchook_names[NUM_LXC_HOOKS] = { |
f7bee6c6 | 175 | "pre-start", "pre-mount", "mount", "autodev", "start", "post-stop" }; |
72d0e1cb | 176 | |
e3b4c4c4 | 177 | typedef int (*instanciate_cb)(struct lxc_handler *, struct lxc_netdev *); |
0ad19a3f | 178 | |
998ac676 RT |
179 | struct mount_opt { |
180 | char *name; | |
181 | int clear; | |
182 | int flag; | |
183 | }; | |
184 | ||
81810dd1 DL |
185 | struct caps_opt { |
186 | char *name; | |
187 | int value; | |
188 | }; | |
189 | ||
e3b4c4c4 ST |
190 | static int instanciate_veth(struct lxc_handler *, struct lxc_netdev *); |
191 | static int instanciate_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
192 | static int instanciate_vlan(struct lxc_handler *, struct lxc_netdev *); | |
193 | static int instanciate_phys(struct lxc_handler *, struct lxc_netdev *); | |
194 | static int instanciate_empty(struct lxc_handler *, struct lxc_netdev *); | |
82d5ae15 | 195 | |
24654103 DL |
196 | static instanciate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { |
197 | [LXC_NET_VETH] = instanciate_veth, | |
198 | [LXC_NET_MACVLAN] = instanciate_macvlan, | |
199 | [LXC_NET_VLAN] = instanciate_vlan, | |
200 | [LXC_NET_PHYS] = instanciate_phys, | |
201 | [LXC_NET_EMPTY] = instanciate_empty, | |
0ad19a3f | 202 | }; |
203 | ||
74a2b586 JK |
204 | static int shutdown_veth(struct lxc_handler *, struct lxc_netdev *); |
205 | static int shutdown_macvlan(struct lxc_handler *, struct lxc_netdev *); | |
206 | static int shutdown_vlan(struct lxc_handler *, struct lxc_netdev *); | |
207 | static int shutdown_phys(struct lxc_handler *, struct lxc_netdev *); | |
208 | static int shutdown_empty(struct lxc_handler *, struct lxc_netdev *); | |
209 | ||
210 | static instanciate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
211 | [LXC_NET_VETH] = shutdown_veth, | |
212 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
213 | [LXC_NET_VLAN] = shutdown_vlan, | |
214 | [LXC_NET_PHYS] = shutdown_phys, | |
215 | [LXC_NET_EMPTY] = shutdown_empty, | |
216 | }; | |
217 | ||
998ac676 | 218 | static struct mount_opt mount_opt[] = { |
88d413d5 SW |
219 | { "defaults", 0, 0 }, |
220 | { "ro", 0, MS_RDONLY }, | |
221 | { "rw", 1, MS_RDONLY }, | |
222 | { "suid", 1, MS_NOSUID }, | |
223 | { "nosuid", 0, MS_NOSUID }, | |
224 | { "dev", 1, MS_NODEV }, | |
225 | { "nodev", 0, MS_NODEV }, | |
226 | { "exec", 1, MS_NOEXEC }, | |
227 | { "noexec", 0, MS_NOEXEC }, | |
228 | { "sync", 0, MS_SYNCHRONOUS }, | |
229 | { "async", 1, MS_SYNCHRONOUS }, | |
230 | { "dirsync", 0, MS_DIRSYNC }, | |
231 | { "remount", 0, MS_REMOUNT }, | |
232 | { "mand", 0, MS_MANDLOCK }, | |
233 | { "nomand", 1, MS_MANDLOCK }, | |
234 | { "atime", 1, MS_NOATIME }, | |
235 | { "noatime", 0, MS_NOATIME }, | |
236 | { "diratime", 1, MS_NODIRATIME }, | |
237 | { "nodiratime", 0, MS_NODIRATIME }, | |
238 | { "bind", 0, MS_BIND }, | |
239 | { "rbind", 0, MS_BIND|MS_REC }, | |
240 | { "relatime", 0, MS_RELATIME }, | |
241 | { "norelatime", 1, MS_RELATIME }, | |
242 | { "strictatime", 0, MS_STRICTATIME }, | |
243 | { "nostrictatime", 1, MS_STRICTATIME }, | |
244 | { NULL, 0, 0 }, | |
998ac676 RT |
245 | }; |
246 | ||
495d2046 | 247 | #if HAVE_SYS_CAPABILITY_H |
81810dd1 | 248 | static struct caps_opt caps_opt[] = { |
a6afdde9 | 249 | { "chown", CAP_CHOWN }, |
1e11be34 DL |
250 | { "dac_override", CAP_DAC_OVERRIDE }, |
251 | { "dac_read_search", CAP_DAC_READ_SEARCH }, | |
252 | { "fowner", CAP_FOWNER }, | |
253 | { "fsetid", CAP_FSETID }, | |
81810dd1 DL |
254 | { "kill", CAP_KILL }, |
255 | { "setgid", CAP_SETGID }, | |
256 | { "setuid", CAP_SETUID }, | |
257 | { "setpcap", CAP_SETPCAP }, | |
258 | { "linux_immutable", CAP_LINUX_IMMUTABLE }, | |
259 | { "net_bind_service", CAP_NET_BIND_SERVICE }, | |
260 | { "net_broadcast", CAP_NET_BROADCAST }, | |
261 | { "net_admin", CAP_NET_ADMIN }, | |
262 | { "net_raw", CAP_NET_RAW }, | |
263 | { "ipc_lock", CAP_IPC_LOCK }, | |
264 | { "ipc_owner", CAP_IPC_OWNER }, | |
265 | { "sys_module", CAP_SYS_MODULE }, | |
266 | { "sys_rawio", CAP_SYS_RAWIO }, | |
267 | { "sys_chroot", CAP_SYS_CHROOT }, | |
268 | { "sys_ptrace", CAP_SYS_PTRACE }, | |
269 | { "sys_pacct", CAP_SYS_PACCT }, | |
270 | { "sys_admin", CAP_SYS_ADMIN }, | |
271 | { "sys_boot", CAP_SYS_BOOT }, | |
272 | { "sys_nice", CAP_SYS_NICE }, | |
273 | { "sys_resource", CAP_SYS_RESOURCE }, | |
274 | { "sys_time", CAP_SYS_TIME }, | |
275 | { "sys_tty_config", CAP_SYS_TTY_CONFIG }, | |
276 | { "mknod", CAP_MKNOD }, | |
277 | { "lease", CAP_LEASE }, | |
9527e566 | 278 | #ifdef CAP_AUDIT_WRITE |
81810dd1 | 279 | { "audit_write", CAP_AUDIT_WRITE }, |
9527e566 FW |
280 | #endif |
281 | #ifdef CAP_AUDIT_CONTROL | |
81810dd1 | 282 | { "audit_control", CAP_AUDIT_CONTROL }, |
9527e566 | 283 | #endif |
81810dd1 DL |
284 | { "setfcap", CAP_SETFCAP }, |
285 | { "mac_override", CAP_MAC_OVERRIDE }, | |
286 | { "mac_admin", CAP_MAC_ADMIN }, | |
5170c716 CS |
287 | #ifdef CAP_SYSLOG |
288 | { "syslog", CAP_SYSLOG }, | |
289 | #endif | |
290 | #ifdef CAP_WAKE_ALARM | |
291 | { "wake_alarm", CAP_WAKE_ALARM }, | |
292 | #endif | |
81810dd1 | 293 | }; |
495d2046 SG |
294 | #else |
295 | static struct caps_opt caps_opt[] = {}; | |
296 | #endif | |
81810dd1 | 297 | |
91c3830e SH |
298 | static int run_buffer(char *buffer) |
299 | { | |
300 | FILE *f; | |
301 | char *output; | |
302 | ||
303 | f = popen(buffer, "r"); | |
304 | if (!f) { | |
305 | SYSERROR("popen failed"); | |
306 | return -1; | |
307 | } | |
308 | ||
309 | output = malloc(LXC_LOG_BUFFER_SIZE); | |
310 | if (!output) { | |
311 | ERROR("failed to allocate memory for script output"); | |
00b6be44 | 312 | pclose(f); |
91c3830e SH |
313 | return -1; |
314 | } | |
315 | ||
316 | while(fgets(output, LXC_LOG_BUFFER_SIZE, f)) | |
317 | DEBUG("script output: %s", output); | |
318 | ||
319 | free(output); | |
320 | ||
321 | if (pclose(f) == -1) { | |
322 | SYSERROR("Script exited on error"); | |
323 | return -1; | |
324 | } | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
751d9dcd DL |
329 | static int run_script(const char *name, const char *section, |
330 | const char *script, ...) | |
e3b4c4c4 | 331 | { |
abbfd20b | 332 | int ret; |
91c3830e | 333 | char *buffer, *p; |
abbfd20b DL |
334 | size_t size = 0; |
335 | va_list ap; | |
751d9dcd DL |
336 | |
337 | INFO("Executing script '%s' for container '%s', config section '%s'", | |
338 | script, name, section); | |
e3b4c4c4 | 339 | |
abbfd20b DL |
340 | va_start(ap, script); |
341 | while ((p = va_arg(ap, char *))) | |
95642a10 | 342 | size += strlen(p) + 1; |
abbfd20b DL |
343 | va_end(ap); |
344 | ||
345 | size += strlen(script); | |
346 | size += strlen(name); | |
347 | size += strlen(section); | |
95642a10 | 348 | size += 3; |
abbfd20b | 349 | |
95642a10 MS |
350 | if (size > INT_MAX) |
351 | return -1; | |
352 | ||
353 | buffer = alloca(size); | |
abbfd20b DL |
354 | if (!buffer) { |
355 | ERROR("failed to allocate memory"); | |
751d9dcd DL |
356 | return -1; |
357 | } | |
358 | ||
9ba8130c SH |
359 | ret = snprintf(buffer, size, "%s %s %s", script, name, section); |
360 | if (ret < 0 || ret >= size) { | |
361 | ERROR("Script name too long"); | |
9ba8130c SH |
362 | return -1; |
363 | } | |
751d9dcd | 364 | |
abbfd20b | 365 | va_start(ap, script); |
9ba8130c SH |
366 | while ((p = va_arg(ap, char *))) { |
367 | int len = size-ret; | |
368 | int rc; | |
369 | rc = snprintf(buffer + ret, len, " %s", p); | |
370 | if (rc < 0 || rc >= len) { | |
9ba8130c SH |
371 | ERROR("Script args too long"); |
372 | return -1; | |
373 | } | |
374 | ret += rc; | |
375 | } | |
abbfd20b | 376 | va_end(ap); |
751d9dcd | 377 | |
91c3830e | 378 | return run_buffer(buffer); |
e3b4c4c4 ST |
379 | } |
380 | ||
a6afdde9 | 381 | static int find_fstype_cb(char* buffer, void *data) |
78ae2fcc | 382 | { |
383 | struct cbarg { | |
384 | const char *rootfs; | |
a6afdde9 | 385 | const char *target; |
78ae2fcc | 386 | int mntopt; |
387 | } *cbarg = data; | |
388 | ||
389 | char *fstype; | |
390 | ||
391 | /* we don't try 'nodev' entries */ | |
392 | if (strstr(buffer, "nodev")) | |
393 | return 0; | |
394 | ||
395 | fstype = buffer; | |
b2718c72 | 396 | fstype += lxc_char_left_gc(fstype, strlen(fstype)); |
397 | fstype[lxc_char_right_gc(fstype, strlen(fstype))] = '\0'; | |
78ae2fcc | 398 | |
a6afdde9 DL |
399 | DEBUG("trying to mount '%s'->'%s' with fstype '%s'", |
400 | cbarg->rootfs, cbarg->target, fstype); | |
401 | ||
402 | if (mount(cbarg->rootfs, cbarg->target, fstype, cbarg->mntopt, NULL)) { | |
403 | DEBUG("mount failed with error: %s", strerror(errno)); | |
78ae2fcc | 404 | return 0; |
a6afdde9 | 405 | } |
78ae2fcc | 406 | |
a6afdde9 DL |
407 | INFO("mounted '%s' on '%s', with fstype '%s'", |
408 | cbarg->rootfs, cbarg->target, fstype); | |
78ae2fcc | 409 | |
410 | return 1; | |
411 | } | |
412 | ||
2656d231 | 413 | static int mount_unknow_fs(const char *rootfs, const char *target, int mntopt) |
78ae2fcc | 414 | { |
a6afdde9 | 415 | int i; |
78ae2fcc | 416 | |
417 | struct cbarg { | |
418 | const char *rootfs; | |
a6afdde9 | 419 | const char *target; |
78ae2fcc | 420 | int mntopt; |
421 | } cbarg = { | |
422 | .rootfs = rootfs, | |
a6afdde9 | 423 | .target = target, |
78ae2fcc | 424 | .mntopt = mntopt, |
425 | }; | |
426 | ||
a6afdde9 DL |
427 | /* |
428 | * find the filesystem type with brute force: | |
429 | * first we check with /etc/filesystems, in case the modules | |
78ae2fcc | 430 | * are auto-loaded and fall back to the supported kernel fs |
431 | */ | |
432 | char *fsfile[] = { | |
433 | "/etc/filesystems", | |
434 | "/proc/filesystems", | |
435 | }; | |
436 | ||
a6afdde9 DL |
437 | for (i = 0; i < sizeof(fsfile)/sizeof(fsfile[0]); i++) { |
438 | ||
439 | int ret; | |
440 | ||
441 | if (access(fsfile[i], F_OK)) | |
442 | continue; | |
443 | ||
444 | ret = lxc_file_for_each_line(fsfile[i], find_fstype_cb, &cbarg); | |
445 | if (ret < 0) { | |
446 | ERROR("failed to parse '%s'", fsfile[i]); | |
447 | return -1; | |
448 | } | |
449 | ||
450 | if (ret) | |
451 | return 0; | |
78ae2fcc | 452 | } |
453 | ||
a6afdde9 DL |
454 | ERROR("failed to determine fs type for '%s'", rootfs); |
455 | return -1; | |
456 | } | |
457 | ||
2656d231 | 458 | static int mount_rootfs_dir(const char *rootfs, const char *target) |
a6afdde9 DL |
459 | { |
460 | return mount(rootfs, target, "none", MS_BIND | MS_REC, NULL); | |
461 | } | |
462 | ||
463 | static int setup_lodev(const char *rootfs, int fd, struct loop_info64 *loinfo) | |
464 | { | |
465 | int rfd; | |
466 | int ret = -1; | |
467 | ||
468 | rfd = open(rootfs, O_RDWR); | |
469 | if (rfd < 0) { | |
470 | SYSERROR("failed to open '%s'", rootfs); | |
78ae2fcc | 471 | return -1; |
472 | } | |
473 | ||
a6afdde9 | 474 | memset(loinfo, 0, sizeof(*loinfo)); |
78ae2fcc | 475 | |
a6afdde9 | 476 | loinfo->lo_flags = LO_FLAGS_AUTOCLEAR; |
78ae2fcc | 477 | |
a6afdde9 DL |
478 | if (ioctl(fd, LOOP_SET_FD, rfd)) { |
479 | SYSERROR("failed to LOOP_SET_FD"); | |
480 | goto out; | |
78ae2fcc | 481 | } |
482 | ||
a6afdde9 DL |
483 | if (ioctl(fd, LOOP_SET_STATUS64, loinfo)) { |
484 | SYSERROR("failed to LOOP_SET_STATUS64"); | |
78ae2fcc | 485 | goto out; |
486 | } | |
487 | ||
a6afdde9 | 488 | ret = 0; |
78ae2fcc | 489 | out: |
a6afdde9 | 490 | close(rfd); |
78ae2fcc | 491 | |
a6afdde9 | 492 | return ret; |
78ae2fcc | 493 | } |
494 | ||
2656d231 | 495 | static int mount_rootfs_file(const char *rootfs, const char *target) |
78ae2fcc | 496 | { |
a6afdde9 DL |
497 | struct dirent dirent, *direntp; |
498 | struct loop_info64 loinfo; | |
9ba8130c | 499 | int ret = -1, fd = -1, rc; |
a6afdde9 DL |
500 | DIR *dir; |
501 | char path[MAXPATHLEN]; | |
78ae2fcc | 502 | |
a6afdde9 DL |
503 | dir = opendir("/dev"); |
504 | if (!dir) { | |
505 | SYSERROR("failed to open '/dev'"); | |
78ae2fcc | 506 | return -1; |
507 | } | |
508 | ||
a6afdde9 DL |
509 | while (!readdir_r(dir, &dirent, &direntp)) { |
510 | ||
511 | if (!direntp) | |
512 | break; | |
513 | ||
514 | if (!strcmp(direntp->d_name, ".")) | |
515 | continue; | |
516 | ||
517 | if (!strcmp(direntp->d_name, "..")) | |
518 | continue; | |
519 | ||
520 | if (strncmp(direntp->d_name, "loop", 4)) | |
521 | continue; | |
522 | ||
9ba8130c SH |
523 | rc = snprintf(path, MAXPATHLEN, "/dev/%s", direntp->d_name); |
524 | if (rc < 0 || rc >= MAXPATHLEN) | |
525 | continue; | |
526 | ||
a6afdde9 DL |
527 | fd = open(path, O_RDWR); |
528 | if (fd < 0) | |
529 | continue; | |
530 | ||
531 | if (ioctl(fd, LOOP_GET_STATUS64, &loinfo) == 0) { | |
532 | close(fd); | |
533 | continue; | |
534 | } | |
535 | ||
536 | if (errno != ENXIO) { | |
537 | WARN("unexpected error for ioctl on '%s': %m", | |
538 | direntp->d_name); | |
00b6be44 | 539 | close(fd); |
a6afdde9 DL |
540 | continue; |
541 | } | |
542 | ||
543 | DEBUG("found '%s' free lodev", path); | |
544 | ||
545 | ret = setup_lodev(rootfs, fd, &loinfo); | |
546 | if (!ret) | |
2656d231 | 547 | ret = mount_unknow_fs(path, target, 0); |
a6afdde9 DL |
548 | close(fd); |
549 | ||
550 | break; | |
551 | } | |
552 | ||
553 | if (closedir(dir)) | |
554 | WARN("failed to close directory"); | |
555 | ||
556 | return ret; | |
78ae2fcc | 557 | } |
558 | ||
2656d231 | 559 | static int mount_rootfs_block(const char *rootfs, const char *target) |
a6afdde9 | 560 | { |
2656d231 | 561 | return mount_unknow_fs(rootfs, target, 0); |
a6afdde9 DL |
562 | } |
563 | ||
0c547523 SH |
564 | /* |
565 | * pin_rootfs | |
566 | * if rootfs is a directory, then open ${rootfs}.hold for writing for the | |
567 | * duration of the container run, to prevent the container from marking the | |
568 | * underlying fs readonly on shutdown. | |
569 | * return -1 on error. | |
570 | * return -2 if nothing needed to be pinned. | |
571 | * return an open fd (>=0) if we pinned it. | |
572 | */ | |
573 | int pin_rootfs(const char *rootfs) | |
574 | { | |
575 | char absrootfs[MAXPATHLEN]; | |
576 | char absrootfspin[MAXPATHLEN]; | |
577 | struct stat s; | |
578 | int ret, fd; | |
579 | ||
e99ee0de | 580 | if (rootfs == NULL || strlen(rootfs) == 0) |
0d03360a | 581 | return -2; |
e99ee0de | 582 | |
0c547523 SH |
583 | if (!realpath(rootfs, absrootfs)) { |
584 | SYSERROR("failed to get real path for '%s'", rootfs); | |
585 | return -1; | |
586 | } | |
587 | ||
588 | if (access(absrootfs, F_OK)) { | |
589 | SYSERROR("'%s' is not accessible", absrootfs); | |
590 | return -1; | |
591 | } | |
592 | ||
593 | if (stat(absrootfs, &s)) { | |
594 | SYSERROR("failed to stat '%s'", absrootfs); | |
595 | return -1; | |
596 | } | |
597 | ||
72f919c4 | 598 | if (!S_ISDIR(s.st_mode)) |
0c547523 SH |
599 | return -2; |
600 | ||
601 | ret = snprintf(absrootfspin, MAXPATHLEN, "%s%s", absrootfs, ".hold"); | |
602 | if (ret >= MAXPATHLEN) { | |
603 | SYSERROR("pathname too long for rootfs hold file"); | |
604 | return -1; | |
605 | } | |
606 | ||
607 | fd = open(absrootfspin, O_CREAT | O_RDWR, S_IWUSR|S_IRUSR); | |
608 | INFO("opened %s as fd %d\n", absrootfspin, fd); | |
609 | return fd; | |
610 | } | |
611 | ||
2656d231 | 612 | static int mount_rootfs(const char *rootfs, const char *target) |
0ad19a3f | 613 | { |
b09ef133 | 614 | char absrootfs[MAXPATHLEN]; |
78ae2fcc | 615 | struct stat s; |
a6afdde9 | 616 | int i; |
78ae2fcc | 617 | |
a6afdde9 | 618 | typedef int (*rootfs_cb)(const char *, const char *); |
78ae2fcc | 619 | |
620 | struct rootfs_type { | |
621 | int type; | |
622 | rootfs_cb cb; | |
623 | } rtfs_type[] = { | |
2656d231 DL |
624 | { S_IFDIR, mount_rootfs_dir }, |
625 | { S_IFBLK, mount_rootfs_block }, | |
626 | { S_IFREG, mount_rootfs_file }, | |
78ae2fcc | 627 | }; |
0ad19a3f | 628 | |
4c8ab83b | 629 | if (!realpath(rootfs, absrootfs)) { |
36eb9bde | 630 | SYSERROR("failed to get real path for '%s'", rootfs); |
4c8ab83b | 631 | return -1; |
632 | } | |
b09ef133 | 633 | |
b09ef133 | 634 | if (access(absrootfs, F_OK)) { |
36eb9bde | 635 | SYSERROR("'%s' is not accessible", absrootfs); |
b09ef133 | 636 | return -1; |
637 | } | |
638 | ||
78ae2fcc | 639 | if (stat(absrootfs, &s)) { |
36eb9bde | 640 | SYSERROR("failed to stat '%s'", absrootfs); |
9b0f0477 | 641 | return -1; |
642 | } | |
643 | ||
78ae2fcc | 644 | for (i = 0; i < sizeof(rtfs_type)/sizeof(rtfs_type[0]); i++) { |
9b0f0477 | 645 | |
78ae2fcc | 646 | if (!__S_ISTYPE(s.st_mode, rtfs_type[i].type)) |
647 | continue; | |
9b0f0477 | 648 | |
a6afdde9 | 649 | return rtfs_type[i].cb(absrootfs, target); |
78ae2fcc | 650 | } |
9b0f0477 | 651 | |
36eb9bde | 652 | ERROR("unsupported rootfs type for '%s'", absrootfs); |
78ae2fcc | 653 | return -1; |
0ad19a3f | 654 | } |
655 | ||
4e5440c6 | 656 | static int setup_utsname(struct utsname *utsname) |
0ad19a3f | 657 | { |
4e5440c6 DL |
658 | if (!utsname) |
659 | return 0; | |
0ad19a3f | 660 | |
4e5440c6 DL |
661 | if (sethostname(utsname->nodename, strlen(utsname->nodename))) { |
662 | SYSERROR("failed to set the hostname to '%s'", utsname->nodename); | |
0ad19a3f | 663 | return -1; |
664 | } | |
665 | ||
4e5440c6 | 666 | INFO("'%s' hostname has been setup", utsname->nodename); |
cd54d859 | 667 | |
0ad19a3f | 668 | return 0; |
669 | } | |
670 | ||
33fcb7a0 | 671 | static int setup_tty(const struct lxc_rootfs *rootfs, |
7c6ef2a2 | 672 | const struct lxc_tty_info *tty_info, char *ttydir) |
b0a33c1e | 673 | { |
7c6ef2a2 SH |
674 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; |
675 | int i, ret; | |
b0a33c1e | 676 | |
bc9bd0e3 DL |
677 | if (!rootfs->path) |
678 | return 0; | |
679 | ||
b0a33c1e | 680 | for (i = 0; i < tty_info->nbtty; i++) { |
681 | ||
682 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
683 | ||
7c6ef2a2 | 684 | ret = snprintf(path, sizeof(path), "%s/dev/tty%d", |
12297168 | 685 | rootfs->mount, i + 1); |
7c6ef2a2 SH |
686 | if (ret >= sizeof(path)) { |
687 | ERROR("pathname too long for ttys"); | |
688 | return -1; | |
689 | } | |
690 | if (ttydir) { | |
691 | /* create dev/lxc/tty%d" */ | |
9ba8130c | 692 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/tty%d", |
7c6ef2a2 SH |
693 | rootfs->mount, ttydir, i + 1); |
694 | if (ret >= sizeof(lxcpath)) { | |
695 | ERROR("pathname too long for ttys"); | |
696 | return -1; | |
697 | } | |
698 | ret = creat(lxcpath, 0660); | |
699 | if (ret==-1 && errno != EEXIST) { | |
700 | SYSERROR("error creating %s\n", lxcpath); | |
701 | return -1; | |
702 | } | |
4d44e274 SH |
703 | if (ret >= 0) |
704 | close(ret); | |
7c6ef2a2 SH |
705 | ret = unlink(path); |
706 | if (ret && errno != ENOENT) { | |
707 | SYSERROR("error unlinking %s\n", path); | |
708 | return -1; | |
709 | } | |
b0a33c1e | 710 | |
7c6ef2a2 SH |
711 | if (mount(pty_info->name, lxcpath, "none", MS_BIND, 0)) { |
712 | WARN("failed to mount '%s'->'%s'", | |
713 | pty_info->name, path); | |
714 | continue; | |
715 | } | |
13954cce | 716 | |
9ba8130c SH |
717 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/tty%d", ttydir, i+1); |
718 | if (ret >= sizeof(lxcpath)) { | |
719 | ERROR("tty pathname too long"); | |
720 | return -1; | |
721 | } | |
7c6ef2a2 SH |
722 | ret = symlink(lxcpath, path); |
723 | if (ret) { | |
724 | SYSERROR("failed to create symlink for tty %d\n", i+1); | |
725 | return -1; | |
726 | } | |
727 | } else { | |
c6883f38 SH |
728 | /* If we populated /dev, then we need to create /dev/ttyN */ |
729 | if (access(path, F_OK)) { | |
730 | ret = creat(path, 0660); | |
731 | if (ret==-1) { | |
732 | SYSERROR("error creating %s\n", path); | |
733 | /* this isn't fatal, continue */ | |
734 | } else | |
735 | close(ret); | |
736 | } | |
7c6ef2a2 SH |
737 | if (mount(pty_info->name, path, "none", MS_BIND, 0)) { |
738 | WARN("failed to mount '%s'->'%s'", | |
739 | pty_info->name, path); | |
740 | continue; | |
741 | } | |
b0a33c1e | 742 | } |
743 | } | |
744 | ||
cd54d859 DL |
745 | INFO("%d tty(s) has been setup", tty_info->nbtty); |
746 | ||
b0a33c1e | 747 | return 0; |
748 | } | |
749 | ||
7a7ff0c6 | 750 | static int setup_rootfs_pivot_root_cb(char *buffer, void *data) |
bf601689 MH |
751 | { |
752 | struct lxc_list *mountlist, *listentry, *iterator; | |
2796cf79 | 753 | char *pivotdir, *mountpoint, *mountentry, *saveptr; |
bf601689 MH |
754 | int found; |
755 | void **cbparm; | |
756 | ||
757 | mountentry = buffer; | |
758 | cbparm = (void **)data; | |
759 | ||
760 | mountlist = cbparm[0]; | |
761 | pivotdir = cbparm[1]; | |
762 | ||
763 | /* parse entry, first field is mountname, ignore */ | |
2796cf79 | 764 | mountpoint = strtok_r(mountentry, " ", &saveptr); |
bf601689 MH |
765 | if (!mountpoint) |
766 | return -1; | |
767 | ||
768 | /* second field is mountpoint */ | |
2796cf79 | 769 | mountpoint = strtok_r(NULL, " ", &saveptr); |
bf601689 MH |
770 | if (!mountpoint) |
771 | return -1; | |
772 | ||
773 | /* only consider mountpoints below old root fs */ | |
774 | if (strncmp(mountpoint, pivotdir, strlen(pivotdir))) | |
775 | return 0; | |
776 | ||
777 | /* filter duplicate mountpoints */ | |
778 | found = 0; | |
779 | lxc_list_for_each(iterator, mountlist) { | |
780 | if (!strcmp(iterator->elem, mountpoint)) { | |
781 | found = 1; | |
782 | break; | |
783 | } | |
784 | } | |
785 | if (found) | |
786 | return 0; | |
787 | ||
788 | /* add entry to list */ | |
789 | listentry = malloc(sizeof(*listentry)); | |
790 | if (!listentry) { | |
791 | SYSERROR("malloc for mountpoint listentry failed"); | |
792 | return -1; | |
793 | } | |
794 | ||
795 | listentry->elem = strdup(mountpoint); | |
796 | if (!listentry->elem) { | |
797 | SYSERROR("strdup failed"); | |
00b6be44 | 798 | free(listentry); |
bf601689 MH |
799 | return -1; |
800 | } | |
801 | lxc_list_add_tail(mountlist, listentry); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
cc6f6dd7 | 806 | static int umount_oldrootfs(const char *oldrootfs) |
bf601689 | 807 | { |
2382ecff | 808 | char path[MAXPATHLEN]; |
bf601689 | 809 | void *cbparm[2]; |
9ebb03ad | 810 | struct lxc_list mountlist, *iterator, *next; |
bf601689 | 811 | int ok, still_mounted, last_still_mounted; |
9ba8130c | 812 | int rc; |
bf601689 MH |
813 | |
814 | /* read and parse /proc/mounts in old root fs */ | |
815 | lxc_list_init(&mountlist); | |
816 | ||
cc6f6dd7 | 817 | /* oldrootfs is on the top tree directory now */ |
9ba8130c SH |
818 | rc = snprintf(path, sizeof(path), "/%s", oldrootfs); |
819 | if (rc >= sizeof(path)) { | |
820 | ERROR("rootfs name too long"); | |
821 | return -1; | |
822 | } | |
bf601689 | 823 | cbparm[0] = &mountlist; |
bf601689 | 824 | |
cc6f6dd7 | 825 | cbparm[1] = strdup(path); |
bf601689 MH |
826 | if (!cbparm[1]) { |
827 | SYSERROR("strdup failed"); | |
828 | return -1; | |
829 | } | |
830 | ||
9ba8130c SH |
831 | rc = snprintf(path, sizeof(path), "%s/proc/mounts", oldrootfs); |
832 | if (rc >= sizeof(path)) { | |
833 | ERROR("container proc/mounts name too long"); | |
834 | return -1; | |
835 | } | |
cc6f6dd7 DL |
836 | |
837 | ok = lxc_file_for_each_line(path, | |
838 | setup_rootfs_pivot_root_cb, &cbparm); | |
bf601689 MH |
839 | if (ok < 0) { |
840 | SYSERROR("failed to read or parse mount list '%s'", path); | |
841 | return -1; | |
842 | } | |
843 | ||
844 | /* umount filesystems until none left or list no longer shrinks */ | |
845 | still_mounted = 0; | |
846 | do { | |
847 | last_still_mounted = still_mounted; | |
848 | still_mounted = 0; | |
849 | ||
9ebb03ad | 850 | lxc_list_for_each_safe(iterator, &mountlist, next) { |
bf601689 | 851 | |
c08556c6 | 852 | /* umount normally */ |
bf601689 MH |
853 | if (!umount(iterator->elem)) { |
854 | DEBUG("umounted '%s'", (char *)iterator->elem); | |
855 | lxc_list_del(iterator); | |
856 | continue; | |
857 | } | |
858 | ||
bf601689 MH |
859 | still_mounted++; |
860 | } | |
7df119ee | 861 | |
bf601689 MH |
862 | } while (still_mounted > 0 && still_mounted != last_still_mounted); |
863 | ||
7df119ee | 864 | |
c08556c6 DL |
865 | lxc_list_for_each(iterator, &mountlist) { |
866 | ||
867 | /* let's try a lazy umount */ | |
868 | if (!umount2(iterator->elem, MNT_DETACH)) { | |
869 | INFO("lazy unmount of '%s'", (char *)iterator->elem); | |
870 | continue; | |
871 | } | |
872 | ||
873 | /* be more brutal (nfs) */ | |
874 | if (!umount2(iterator->elem, MNT_FORCE)) { | |
875 | INFO("forced unmount of '%s'", (char *)iterator->elem); | |
876 | continue; | |
877 | } | |
878 | ||
7df119ee | 879 | WARN("failed to unmount '%s'", (char *)iterator->elem); |
c08556c6 | 880 | } |
bf601689 | 881 | |
cc6f6dd7 DL |
882 | return 0; |
883 | } | |
884 | ||
885 | static int setup_rootfs_pivot_root(const char *rootfs, const char *pivotdir) | |
886 | { | |
887 | char path[MAXPATHLEN]; | |
888 | int remove_pivotdir = 0; | |
9ba8130c | 889 | int rc; |
cc6f6dd7 DL |
890 | |
891 | /* change into new root fs */ | |
892 | if (chdir(rootfs)) { | |
893 | SYSERROR("can't chdir to new rootfs '%s'", rootfs); | |
894 | return -1; | |
895 | } | |
896 | ||
897 | if (!pivotdir) | |
30c5d292 | 898 | pivotdir = "lxc_putold"; |
cc6f6dd7 | 899 | |
4f9293b1 | 900 | /* compute the full path to pivotdir under rootfs */ |
9ba8130c SH |
901 | rc = snprintf(path, sizeof(path), "%s/%s", rootfs, pivotdir); |
902 | if (rc >= sizeof(path)) { | |
903 | ERROR("pivot dir name too long"); | |
904 | return -1; | |
905 | } | |
cc6f6dd7 DL |
906 | |
907 | if (access(path, F_OK)) { | |
908 | ||
909 | if (mkdir_p(path, 0755)) { | |
910 | SYSERROR("failed to create pivotdir '%s'", path); | |
911 | return -1; | |
912 | } | |
913 | ||
914 | remove_pivotdir = 1; | |
915 | DEBUG("created '%s' directory", path); | |
916 | } | |
917 | ||
918 | DEBUG("mountpoint for old rootfs is '%s'", path); | |
919 | ||
920 | /* pivot_root into our new root fs */ | |
921 | if (pivot_root(".", path)) { | |
922 | SYSERROR("pivot_root syscall failed"); | |
bf601689 MH |
923 | return -1; |
924 | } | |
cc6f6dd7 DL |
925 | |
926 | if (chdir("/")) { | |
927 | SYSERROR("can't chdir to / after pivot_root"); | |
928 | return -1; | |
929 | } | |
930 | ||
931 | DEBUG("pivot_root syscall to '%s' successful", rootfs); | |
932 | ||
933 | /* we switch from absolute path to relative path */ | |
934 | if (umount_oldrootfs(pivotdir)) | |
935 | return -1; | |
bf601689 | 936 | |
c08556c6 DL |
937 | /* remove temporary mount point, we don't consider the removing |
938 | * as fatal */ | |
a91d897a FW |
939 | if (remove_pivotdir && rmdir(pivotdir)) |
940 | WARN("can't remove mountpoint '%s': %m", pivotdir); | |
bf601689 | 941 | |
bf601689 MH |
942 | return 0; |
943 | } | |
944 | ||
91c3830e SH |
945 | /* |
946 | * Do we want to add options for max size of /dev and a file to | |
947 | * specify which devices to create? | |
948 | */ | |
949 | static int mount_autodev(char *root) | |
950 | { | |
951 | int ret; | |
952 | char path[MAXPATHLEN]; | |
953 | ||
954 | INFO("Mounting /dev under %s\n", root); | |
955 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); | |
956 | if (ret < 0 || ret > MAXPATHLEN) | |
957 | return -1; | |
958 | ret = mount("none", path, "tmpfs", 0, "size=100000"); | |
959 | if (ret) { | |
960 | SYSERROR("Failed to mount /dev at %s\n", root); | |
961 | return -1; | |
962 | } | |
963 | ret = snprintf(path, MAXPATHLEN, "%s/dev/pts", root); | |
964 | if (ret < 0 || ret >= MAXPATHLEN) | |
965 | return -1; | |
966 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
967 | if (ret) { | |
968 | SYSERROR("Failed to create /dev/pts in container"); | |
969 | return -1; | |
970 | } | |
971 | ||
972 | INFO("Mounted /dev under %s\n", root); | |
973 | return 0; | |
974 | } | |
975 | ||
c6883f38 SH |
976 | struct lxc_devs { |
977 | char *name; | |
978 | mode_t mode; | |
979 | int maj; | |
980 | int min; | |
981 | }; | |
982 | ||
983 | struct lxc_devs lxc_devs[] = { | |
984 | { "null", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 3 }, | |
985 | { "zero", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 5 }, | |
986 | { "full", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 7 }, | |
987 | { "urandom", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 9 }, | |
988 | { "random", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 1, 8 }, | |
989 | { "tty", S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO, 5, 0 }, | |
990 | { "console", S_IFCHR | S_IRUSR | S_IWUSR, 5, 1 }, | |
991 | }; | |
992 | ||
c6883f38 SH |
993 | static int setup_autodev(char *root) |
994 | { | |
995 | int ret; | |
996 | struct lxc_devs *d; | |
997 | char path[MAXPATHLEN]; | |
998 | int i; | |
3a32201c | 999 | mode_t cmask; |
c6883f38 | 1000 | |
91c3830e SH |
1001 | INFO("Creating initial consoles under %s/dev\n", root); |
1002 | ||
c6883f38 | 1003 | ret = snprintf(path, MAXPATHLEN, "%s/dev", root); |
91c3830e SH |
1004 | if (ret < 0 || ret >= MAXPATHLEN) { |
1005 | ERROR("Error calculating container /dev location"); | |
c6883f38 | 1006 | return -1; |
f7bee6c6 | 1007 | } |
91c3830e SH |
1008 | |
1009 | INFO("Populating /dev under %s\n", root); | |
3a32201c | 1010 | cmask = umask(S_IXUSR | S_IXGRP | S_IXOTH); |
c6883f38 SH |
1011 | for (i = 0; i < sizeof(lxc_devs) / sizeof(lxc_devs[0]); i++) { |
1012 | d = &lxc_devs[i]; | |
1013 | ret = snprintf(path, MAXPATHLEN, "%s/dev/%s", root, d->name); | |
1014 | if (ret < 0 || ret >= MAXPATHLEN) | |
1015 | return -1; | |
1016 | ret = mknod(path, d->mode, makedev(d->maj, d->min)); | |
91c3830e | 1017 | if (ret && errno != EEXIST) { |
c6883f38 SH |
1018 | SYSERROR("Error creating %s\n", d->name); |
1019 | return -1; | |
1020 | } | |
1021 | } | |
3a32201c | 1022 | umask(cmask); |
c6883f38 SH |
1023 | |
1024 | INFO("Populated /dev under %s\n", root); | |
1025 | return 0; | |
1026 | } | |
1027 | ||
cc28d0b0 SH |
1028 | /* |
1029 | * Detect whether / is mounted MS_SHARED. The only way I know of to | |
1030 | * check that is through /proc/self/mountinfo. | |
1031 | * I'm only checking for /. If the container rootfs or mount location | |
1032 | * is MS_SHARED, but not '/', then you're out of luck - figuring that | |
1033 | * out would be too much work to be worth it. | |
1034 | */ | |
1035 | #define LINELEN 4096 | |
1036 | int detect_shared_rootfs(void) | |
1037 | { | |
1038 | char buf[LINELEN], *p; | |
1039 | FILE *f; | |
1040 | int i; | |
1041 | char *p2; | |
1042 | ||
1043 | f = fopen("/proc/self/mountinfo", "r"); | |
1044 | if (!f) | |
1045 | return 0; | |
1046 | while ((p = fgets(buf, LINELEN, f))) { | |
1047 | INFO("looking at .%s.", p); | |
1048 | for (p = buf, i=0; p && i < 4; i++) | |
1049 | p = index(p+1, ' '); | |
1050 | if (!p) | |
1051 | continue; | |
1052 | p2 = index(p+1, ' '); | |
1053 | if (!p2) | |
1054 | continue; | |
1055 | *p2 = '\0'; | |
1056 | INFO("now p is .%s.", p); | |
1057 | if (strcmp(p+1, "/") == 0) { | |
1058 | // this is '/'. is it shared? | |
1059 | p = index(p2+1, ' '); | |
00b6be44 SH |
1060 | if (strstr(p, "shared:")) { |
1061 | fclose(f); | |
cc28d0b0 | 1062 | return 1; |
00b6be44 | 1063 | } |
cc28d0b0 SH |
1064 | } |
1065 | } | |
1066 | fclose(f); | |
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * I'll forgive you for asking whether all of this is needed :) The | |
1072 | * answer is yes. | |
1073 | * pivot_root will fail if the new root, the put_old dir, or the parent | |
1074 | * of current->fs->root are MS_SHARED. (parent of current->fs_root may | |
1075 | * or may not be current->fs_root - if we assumed it always was, we could | |
1076 | * just mount --make-rslave /). So, | |
1077 | * 1. mount a tiny tmpfs to be parent of current->fs->root. | |
1078 | * 2. make that MS_SLAVE | |
1079 | * 3. make a 'root' directory under that | |
1080 | * 4. mount --rbind / under the $tinyroot/root. | |
1081 | * 5. make that rslave | |
1082 | * 6. chdir and chroot into $tinyroot/root | |
1083 | * 7. $tinyroot will be unmounted by our parent in start.c | |
1084 | */ | |
1085 | static int chroot_into_slave(struct lxc_conf *conf) | |
1086 | { | |
1087 | char path[MAXPATHLEN]; | |
1088 | const char *destpath = conf->rootfs.mount; | |
1089 | int ret; | |
1090 | ||
1091 | if (mount(destpath, destpath, NULL, MS_BIND, 0)) { | |
1092 | SYSERROR("failed to mount %s bind", destpath); | |
1093 | return -1; | |
1094 | } | |
1095 | if (mount("", destpath, NULL, MS_SLAVE, 0)) { | |
1096 | SYSERROR("failed to make %s slave", destpath); | |
1097 | return -1; | |
1098 | } | |
1099 | if (mount("none", destpath, "tmpfs", 0, "size=10000")) { | |
1100 | SYSERROR("Failed to mount tmpfs / at %s", destpath); | |
1101 | return -1; | |
1102 | } | |
1103 | ret = snprintf(path, MAXPATHLEN, "%s/root", destpath); | |
1104 | if (ret < 0 || ret >= MAXPATHLEN) { | |
1105 | ERROR("out of memory making root path"); | |
1106 | return -1; | |
1107 | } | |
1108 | if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)) { | |
1109 | SYSERROR("Failed to create /dev/pts in container"); | |
1110 | return -1; | |
1111 | } | |
1112 | if (mount("/", path, NULL, MS_BIND|MS_REC, 0)) { | |
1113 | SYSERROR("Failed to rbind mount / to %s", path); | |
1114 | return -1; | |
1115 | } | |
1116 | if (mount("", destpath, NULL, MS_SLAVE|MS_REC, 0)) { | |
1117 | SYSERROR("Failed to make tmp-/ at %s rslave", path); | |
1118 | return -1; | |
1119 | } | |
1120 | if (chdir(path)) { | |
1121 | SYSERROR("Failed to chdir into tmp-/"); | |
1122 | return -1; | |
1123 | } | |
1124 | if (chroot(path)) { | |
1125 | SYSERROR("Failed to chroot into tmp-/"); | |
1126 | return -1; | |
1127 | } | |
1128 | INFO("Chrooted into tmp-/ at %s\n", path); | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static int setup_rootfs(struct lxc_conf *conf) | |
0ad19a3f | 1133 | { |
cc28d0b0 SH |
1134 | const struct lxc_rootfs *rootfs = &conf->rootfs; |
1135 | ||
a0f379bf DW |
1136 | if (!rootfs->path) { |
1137 | if (mount("", "/", NULL, MS_SLAVE|MS_REC, 0)) { | |
1138 | SYSERROR("Failed to make / rslave"); | |
1139 | return -1; | |
1140 | } | |
c69bd12f | 1141 | return 0; |
a0f379bf | 1142 | } |
0ad19a3f | 1143 | |
12297168 | 1144 | if (access(rootfs->mount, F_OK)) { |
b1789442 | 1145 | SYSERROR("failed to access to '%s', check it is present", |
12297168 | 1146 | rootfs->mount); |
b1789442 DL |
1147 | return -1; |
1148 | } | |
1149 | ||
cc28d0b0 SH |
1150 | if (detect_shared_rootfs()) { |
1151 | if (chroot_into_slave(conf)) { | |
1152 | ERROR("Failed to chroot into slave /"); | |
1153 | return -1; | |
1154 | } | |
1155 | } | |
1156 | ||
2656d231 | 1157 | if (mount_rootfs(rootfs->path, rootfs->mount)) { |
a6afdde9 | 1158 | ERROR("failed to mount rootfs"); |
c3f0a28c | 1159 | return -1; |
1160 | } | |
0ad19a3f | 1161 | |
12297168 | 1162 | DEBUG("mounted '%s' on '%s'", rootfs->path, rootfs->mount); |
c69bd12f | 1163 | |
ac778708 DL |
1164 | return 0; |
1165 | } | |
1166 | ||
1167 | int setup_pivot_root(const struct lxc_rootfs *rootfs) | |
1168 | { | |
ac778708 DL |
1169 | if (!rootfs->path) |
1170 | return 0; | |
1171 | ||
12297168 | 1172 | if (setup_rootfs_pivot_root(rootfs->mount, rootfs->pivot)) { |
cc6f6dd7 | 1173 | ERROR("failed to setup pivot root"); |
25368b52 | 1174 | return -1; |
c69bd12f DL |
1175 | } |
1176 | ||
25368b52 | 1177 | return 0; |
0ad19a3f | 1178 | } |
1179 | ||
d852c78c | 1180 | static int setup_pts(int pts) |
3c26f34e | 1181 | { |
77890c6d SW |
1182 | char target[PATH_MAX]; |
1183 | ||
d852c78c DL |
1184 | if (!pts) |
1185 | return 0; | |
3c26f34e | 1186 | |
1187 | if (!access("/dev/pts/ptmx", F_OK) && umount("/dev/pts")) { | |
36eb9bde | 1188 | SYSERROR("failed to umount 'dev/pts'"); |
3c26f34e | 1189 | return -1; |
1190 | } | |
1191 | ||
a6afdde9 DL |
1192 | if (mount("devpts", "/dev/pts", "devpts", MS_MGC_VAL, |
1193 | "newinstance,ptmxmode=0666")) { | |
36eb9bde | 1194 | SYSERROR("failed to mount a new instance of '/dev/pts'"); |
3c26f34e | 1195 | return -1; |
1196 | } | |
1197 | ||
3c26f34e | 1198 | if (access("/dev/ptmx", F_OK)) { |
1199 | if (!symlink("/dev/pts/ptmx", "/dev/ptmx")) | |
1200 | goto out; | |
36eb9bde | 1201 | SYSERROR("failed to symlink '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1202 | return -1; |
1203 | } | |
1204 | ||
77890c6d SW |
1205 | if (realpath("/dev/ptmx", target) && !strcmp(target, "/dev/pts/ptmx")) |
1206 | goto out; | |
1207 | ||
3c26f34e | 1208 | /* fallback here, /dev/pts/ptmx exists just mount bind */ |
1209 | if (mount("/dev/pts/ptmx", "/dev/ptmx", "none", MS_BIND, 0)) { | |
36eb9bde | 1210 | SYSERROR("mount failed '/dev/pts/ptmx'->'/dev/ptmx'"); |
3c26f34e | 1211 | return -1; |
1212 | } | |
cd54d859 DL |
1213 | |
1214 | INFO("created new pts instance"); | |
d852c78c | 1215 | |
3c26f34e | 1216 | out: |
1217 | return 0; | |
1218 | } | |
1219 | ||
cccc74b5 DL |
1220 | static int setup_personality(int persona) |
1221 | { | |
6ff05e18 | 1222 | #if HAVE_SYS_PERSONALITY_H |
cccc74b5 DL |
1223 | if (persona == -1) |
1224 | return 0; | |
1225 | ||
1226 | if (personality(persona) < 0) { | |
1227 | SYSERROR("failed to set personality to '0x%x'", persona); | |
1228 | return -1; | |
1229 | } | |
1230 | ||
1231 | INFO("set personality to '0x%x'", persona); | |
6ff05e18 | 1232 | #endif |
cccc74b5 DL |
1233 | |
1234 | return 0; | |
1235 | } | |
1236 | ||
7c6ef2a2 | 1237 | static int setup_dev_console(const struct lxc_rootfs *rootfs, |
33fcb7a0 | 1238 | const struct lxc_console *console) |
6e590161 | 1239 | { |
63376d7d DL |
1240 | char path[MAXPATHLEN]; |
1241 | struct stat s; | |
7c6ef2a2 | 1242 | int ret; |
52e35957 | 1243 | |
7c6ef2a2 SH |
1244 | ret = snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); |
1245 | if (ret >= sizeof(path)) { | |
1246 | ERROR("console path too long\n"); | |
1247 | return -1; | |
1248 | } | |
52e35957 | 1249 | |
63376d7d | 1250 | if (access(path, F_OK)) { |
466978b0 | 1251 | WARN("rootfs specified but no console found at '%s'", path); |
63376d7d | 1252 | return 0; |
52e35957 DL |
1253 | } |
1254 | ||
f78a1f32 | 1255 | if (console->peer == -1) { |
63376d7d | 1256 | INFO("no console output required"); |
f78a1f32 DL |
1257 | return 0; |
1258 | } | |
ed502555 | 1259 | |
63376d7d DL |
1260 | if (stat(path, &s)) { |
1261 | SYSERROR("failed to stat '%s'", path); | |
1262 | return -1; | |
1263 | } | |
1264 | ||
1265 | if (chmod(console->name, s.st_mode)) { | |
1266 | SYSERROR("failed to set mode '0%o' to '%s'", | |
1267 | s.st_mode, console->name); | |
1268 | return -1; | |
1269 | } | |
13954cce | 1270 | |
63376d7d DL |
1271 | if (mount(console->name, path, "none", MS_BIND, 0)) { |
1272 | ERROR("failed to mount '%s' on '%s'", console->name, path); | |
6e590161 | 1273 | return -1; |
1274 | } | |
1275 | ||
63376d7d | 1276 | INFO("console has been setup"); |
7c6ef2a2 SH |
1277 | return 0; |
1278 | } | |
1279 | ||
1280 | static int setup_ttydir_console(const struct lxc_rootfs *rootfs, | |
1281 | const struct lxc_console *console, | |
1282 | char *ttydir) | |
1283 | { | |
1284 | char path[MAXPATHLEN], lxcpath[MAXPATHLEN]; | |
1285 | int ret; | |
1286 | ||
1287 | /* create rootfs/dev/<ttydir> directory */ | |
1288 | ret = snprintf(path, sizeof(path), "%s/dev/%s", rootfs->mount, | |
1289 | ttydir); | |
1290 | if (ret >= sizeof(path)) | |
1291 | return -1; | |
1292 | ret = mkdir(path, 0755); | |
1293 | if (ret && errno != EEXIST) { | |
1294 | SYSERROR("failed with errno %d to create %s\n", errno, path); | |
1295 | return -1; | |
1296 | } | |
1297 | INFO("created %s\n", path); | |
1298 | ||
1299 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/dev/%s/console", | |
1300 | rootfs->mount, ttydir); | |
1301 | if (ret >= sizeof(lxcpath)) { | |
1302 | ERROR("console path too long\n"); | |
1303 | return -1; | |
1304 | } | |
1305 | ||
1306 | snprintf(path, sizeof(path), "%s/dev/console", rootfs->mount); | |
1307 | ret = unlink(path); | |
1308 | if (ret && errno != ENOENT) { | |
1309 | SYSERROR("error unlinking %s\n", path); | |
1310 | return -1; | |
1311 | } | |
1312 | ||
1313 | ret = creat(lxcpath, 0660); | |
1314 | if (ret==-1 && errno != EEXIST) { | |
1315 | SYSERROR("error %d creating %s\n", errno, lxcpath); | |
1316 | return -1; | |
1317 | } | |
4d44e274 SH |
1318 | if (ret >= 0) |
1319 | close(ret); | |
7c6ef2a2 SH |
1320 | |
1321 | if (console->peer == -1) { | |
1322 | INFO("no console output required"); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | if (mount(console->name, lxcpath, "none", MS_BIND, 0)) { | |
1327 | ERROR("failed to mount '%s' on '%s'", console->name, lxcpath); | |
1328 | return -1; | |
1329 | } | |
1330 | ||
1331 | /* create symlink from rootfs/dev/console to 'lxc/console' */ | |
9ba8130c SH |
1332 | ret = snprintf(lxcpath, sizeof(lxcpath), "%s/console", ttydir); |
1333 | if (ret >= sizeof(lxcpath)) { | |
1334 | ERROR("lxc/console path too long"); | |
1335 | return -1; | |
1336 | } | |
7c6ef2a2 SH |
1337 | ret = symlink(lxcpath, path); |
1338 | if (ret) { | |
1339 | SYSERROR("failed to create symlink for console"); | |
1340 | return -1; | |
1341 | } | |
1342 | ||
1343 | INFO("console has been setup on %s", lxcpath); | |
cd54d859 | 1344 | |
6e590161 | 1345 | return 0; |
1346 | } | |
1347 | ||
7c6ef2a2 SH |
1348 | static int setup_console(const struct lxc_rootfs *rootfs, |
1349 | const struct lxc_console *console, | |
1350 | char *ttydir) | |
1351 | { | |
1352 | /* We don't have a rootfs, /dev/console will be shared */ | |
1353 | if (!rootfs->path) | |
1354 | return 0; | |
1355 | if (!ttydir) | |
1356 | return setup_dev_console(rootfs, console); | |
1357 | ||
1358 | return setup_ttydir_console(rootfs, console, ttydir); | |
1359 | } | |
1360 | ||
1bd051a6 SH |
1361 | static int setup_kmsg(const struct lxc_rootfs *rootfs, |
1362 | const struct lxc_console *console) | |
1363 | { | |
1364 | char kpath[MAXPATHLEN]; | |
1365 | int ret; | |
1366 | ||
222fea5a DE |
1367 | if (!rootfs->path) |
1368 | return 0; | |
1bd051a6 SH |
1369 | ret = snprintf(kpath, sizeof(kpath), "%s/dev/kmsg", rootfs->mount); |
1370 | if (ret < 0 || ret >= sizeof(kpath)) | |
1371 | return -1; | |
1372 | ||
1373 | ret = unlink(kpath); | |
1374 | if (ret && errno != ENOENT) { | |
1375 | SYSERROR("error unlinking %s\n", kpath); | |
1376 | return -1; | |
1377 | } | |
1378 | ||
1379 | ret = symlink("console", kpath); | |
1380 | if (ret) { | |
1381 | SYSERROR("failed to create symlink for kmsg"); | |
1382 | return -1; | |
1383 | } | |
1384 | ||
1385 | return 0; | |
1386 | } | |
1387 | ||
ae5c8b8e | 1388 | int setup_cgroup(const char *cgpath, struct lxc_list *cgroups) |
576f946d | 1389 | { |
102a5303 DL |
1390 | struct lxc_list *iterator; |
1391 | struct lxc_cgroup *cg; | |
88329c69 | 1392 | int ret = -1; |
6f4a3756 | 1393 | |
102a5303 DL |
1394 | if (lxc_list_empty(cgroups)) |
1395 | return 0; | |
6f4a3756 | 1396 | |
102a5303 | 1397 | lxc_list_for_each(iterator, cgroups) { |
13954cce | 1398 | |
102a5303 | 1399 | cg = iterator->elem; |
6f4a3756 | 1400 | |
ae5c8b8e SH |
1401 | if (lxc_cgroup_set_bypath(cgpath, cg->subsystem, cg->value)) { |
1402 | ERROR("Error setting %s to %s for %s\n", cg->subsystem, | |
1403 | cg->value, cgpath); | |
88329c69 | 1404 | goto out; |
ae5c8b8e | 1405 | } |
6f4a3756 | 1406 | |
102a5303 | 1407 | DEBUG("cgroup '%s' set to '%s'", cg->subsystem, cg->value); |
6f4a3756 | 1408 | } |
13954cce | 1409 | |
88329c69 | 1410 | ret = 0; |
cd54d859 | 1411 | INFO("cgroup has been setup"); |
88329c69 MN |
1412 | out: |
1413 | return ret; | |
576f946d | 1414 | } |
1415 | ||
998ac676 RT |
1416 | static void parse_mntopt(char *opt, unsigned long *flags, char **data) |
1417 | { | |
1418 | struct mount_opt *mo; | |
1419 | ||
1420 | /* If opt is found in mount_opt, set or clear flags. | |
1421 | * Otherwise append it to data. */ | |
1422 | ||
1423 | for (mo = &mount_opt[0]; mo->name != NULL; mo++) { | |
1424 | if (!strncmp(opt, mo->name, strlen(mo->name))) { | |
1425 | if (mo->clear) | |
1426 | *flags &= ~mo->flag; | |
1427 | else | |
1428 | *flags |= mo->flag; | |
1429 | return; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | if (strlen(*data)) | |
1434 | strcat(*data, ","); | |
1435 | strcat(*data, opt); | |
1436 | } | |
1437 | ||
911324ef | 1438 | static int parse_mntopts(const char *mntopts, unsigned long *mntflags, |
998ac676 RT |
1439 | char **mntdata) |
1440 | { | |
1441 | char *s, *data; | |
1442 | char *p, *saveptr = NULL; | |
1443 | ||
911324ef | 1444 | *mntdata = NULL; |
91656ce5 | 1445 | *mntflags = 0L; |
911324ef DL |
1446 | |
1447 | if (!mntopts) | |
998ac676 RT |
1448 | return 0; |
1449 | ||
911324ef | 1450 | s = strdup(mntopts); |
998ac676 | 1451 | if (!s) { |
36eb9bde | 1452 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1453 | return -1; |
1454 | } | |
1455 | ||
1456 | data = malloc(strlen(s) + 1); | |
1457 | if (!data) { | |
36eb9bde | 1458 | SYSERROR("failed to allocate memory"); |
998ac676 RT |
1459 | free(s); |
1460 | return -1; | |
1461 | } | |
1462 | *data = 0; | |
1463 | ||
1464 | for (p = strtok_r(s, ",", &saveptr); p != NULL; | |
1465 | p = strtok_r(NULL, ",", &saveptr)) | |
1466 | parse_mntopt(p, mntflags, &data); | |
1467 | ||
1468 | if (*data) | |
1469 | *mntdata = data; | |
1470 | else | |
1471 | free(data); | |
1472 | free(s); | |
1473 | ||
1474 | return 0; | |
1475 | } | |
1476 | ||
911324ef DL |
1477 | static int mount_entry(const char *fsname, const char *target, |
1478 | const char *fstype, unsigned long mountflags, | |
1479 | const char *data) | |
1480 | { | |
1481 | if (mount(fsname, target, fstype, mountflags & ~MS_REMOUNT, data)) { | |
1482 | SYSERROR("failed to mount '%s' on '%s'", fsname, target); | |
1483 | return -1; | |
1484 | } | |
1485 | ||
1486 | if ((mountflags & MS_REMOUNT) || (mountflags & MS_BIND)) { | |
1487 | ||
1488 | DEBUG("remounting %s on %s to respect bind or remount options", | |
1489 | fsname, target); | |
1490 | ||
1491 | if (mount(fsname, target, fstype, | |
1492 | mountflags | MS_REMOUNT, data)) { | |
1493 | SYSERROR("failed to mount '%s' on '%s'", | |
1494 | fsname, target); | |
1495 | return -1; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | DEBUG("mounted '%s' on '%s', type '%s'", fsname, target, fstype); | |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | static inline int mount_entry_on_systemfs(struct mntent *mntent) | |
0ad19a3f | 1505 | { |
998ac676 RT |
1506 | unsigned long mntflags; |
1507 | char *mntdata; | |
911324ef DL |
1508 | int ret; |
1509 | ||
1510 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { | |
1511 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1512 | return -1; | |
1513 | } | |
1514 | ||
1515 | ret = mount_entry(mntent->mnt_fsname, mntent->mnt_dir, | |
1516 | mntent->mnt_type, mntflags, mntdata); | |
1517 | ||
68c152ef SH |
1518 | if (hasmntopt(mntent, "optional") != NULL) |
1519 | ret = 0; | |
1520 | ||
911324ef DL |
1521 | free(mntdata); |
1522 | ||
1523 | return ret; | |
1524 | } | |
1525 | ||
1526 | static int mount_entry_on_absolute_rootfs(struct mntent *mntent, | |
80a881b2 SH |
1527 | const struct lxc_rootfs *rootfs, |
1528 | const char *lxc_name) | |
911324ef | 1529 | { |
013bd428 | 1530 | char *aux; |
59760f5d | 1531 | char path[MAXPATHLEN]; |
911324ef DL |
1532 | unsigned long mntflags; |
1533 | char *mntdata; | |
80a881b2 | 1534 | int r, ret = 0, offset; |
67e571de | 1535 | const char *lxcpath; |
0ad19a3f | 1536 | |
911324ef DL |
1537 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1538 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1539 | return -1; | |
1540 | } | |
1bc60a65 | 1541 | |
2a59a681 SH |
1542 | lxcpath = default_lxc_path(); |
1543 | if (!lxcpath) { | |
1544 | ERROR("Out of memory"); | |
1545 | return -1; | |
1546 | } | |
1547 | ||
80a881b2 | 1548 | /* if rootfs->path is a blockdev path, allow container fstab to |
2a59a681 SH |
1549 | * use $lxcpath/CN/rootfs as the target prefix */ |
1550 | r = snprintf(path, MAXPATHLEN, "%s/%s/rootfs", lxcpath, lxc_name); | |
80a881b2 SH |
1551 | if (r < 0 || r >= MAXPATHLEN) |
1552 | goto skipvarlib; | |
1553 | ||
1554 | aux = strstr(mntent->mnt_dir, path); | |
1555 | if (aux) { | |
1556 | offset = strlen(path); | |
1557 | goto skipabs; | |
1558 | } | |
1559 | ||
1560 | skipvarlib: | |
013bd428 DL |
1561 | aux = strstr(mntent->mnt_dir, rootfs->path); |
1562 | if (!aux) { | |
1563 | WARN("ignoring mount point '%s'", mntent->mnt_dir); | |
1564 | goto out; | |
1565 | } | |
80a881b2 SH |
1566 | offset = strlen(rootfs->path); |
1567 | ||
1568 | skipabs: | |
013bd428 | 1569 | |
9ba8130c | 1570 | r = snprintf(path, MAXPATHLEN, "%s/%s", rootfs->mount, |
80a881b2 SH |
1571 | aux + offset); |
1572 | if (r < 0 || r >= MAXPATHLEN) { | |
1573 | WARN("pathnme too long for '%s'", mntent->mnt_dir); | |
1574 | ret = -1; | |
1575 | goto out; | |
1576 | } | |
1577 | ||
d330fe7b | 1578 | |
013bd428 | 1579 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, |
911324ef | 1580 | mntflags, mntdata); |
0ad19a3f | 1581 | |
68c152ef SH |
1582 | if (hasmntopt(mntent, "optional") != NULL) |
1583 | ret = 0; | |
1584 | ||
013bd428 | 1585 | out: |
911324ef DL |
1586 | free(mntdata); |
1587 | return ret; | |
1588 | } | |
d330fe7b | 1589 | |
911324ef DL |
1590 | static int mount_entry_on_relative_rootfs(struct mntent *mntent, |
1591 | const char *rootfs) | |
1592 | { | |
1593 | char path[MAXPATHLEN]; | |
1594 | unsigned long mntflags; | |
1595 | char *mntdata; | |
1596 | int ret; | |
d330fe7b | 1597 | |
911324ef DL |
1598 | if (parse_mntopts(mntent->mnt_opts, &mntflags, &mntdata) < 0) { |
1599 | ERROR("failed to parse mount option '%s'", mntent->mnt_opts); | |
1600 | return -1; | |
1601 | } | |
d330fe7b | 1602 | |
911324ef | 1603 | /* relative to root mount point */ |
9ba8130c SH |
1604 | ret = snprintf(path, sizeof(path), "%s/%s", rootfs, mntent->mnt_dir); |
1605 | if (ret >= sizeof(path)) { | |
1606 | ERROR("path name too long"); | |
1607 | return -1; | |
1608 | } | |
911324ef DL |
1609 | |
1610 | ret = mount_entry(mntent->mnt_fsname, path, mntent->mnt_type, | |
1611 | mntflags, mntdata); | |
1612 | ||
68c152ef SH |
1613 | if (hasmntopt(mntent, "optional") != NULL) |
1614 | ret = 0; | |
1615 | ||
911324ef | 1616 | free(mntdata); |
998ac676 | 1617 | |
911324ef DL |
1618 | return ret; |
1619 | } | |
1620 | ||
80a881b2 SH |
1621 | static int mount_file_entries(const struct lxc_rootfs *rootfs, FILE *file, |
1622 | const char *lxc_name) | |
911324ef DL |
1623 | { |
1624 | struct mntent *mntent; | |
1625 | int ret = -1; | |
e76b8764 | 1626 | |
911324ef | 1627 | while ((mntent = getmntent(file))) { |
e76b8764 | 1628 | |
911324ef DL |
1629 | if (!rootfs->path) { |
1630 | if (mount_entry_on_systemfs(mntent)) | |
e76b8764 | 1631 | goto out; |
911324ef | 1632 | continue; |
e76b8764 CDC |
1633 | } |
1634 | ||
911324ef DL |
1635 | /* We have a separate root, mounts are relative to it */ |
1636 | if (mntent->mnt_dir[0] != '/') { | |
1637 | if (mount_entry_on_relative_rootfs(mntent, | |
1638 | rootfs->mount)) | |
1639 | goto out; | |
1640 | continue; | |
1641 | } | |
cd54d859 | 1642 | |
80a881b2 | 1643 | if (mount_entry_on_absolute_rootfs(mntent, rootfs, lxc_name)) |
911324ef | 1644 | goto out; |
0ad19a3f | 1645 | } |
cd54d859 | 1646 | |
0ad19a3f | 1647 | ret = 0; |
cd54d859 DL |
1648 | |
1649 | INFO("mount points have been setup"); | |
0ad19a3f | 1650 | out: |
e7938e9e MN |
1651 | return ret; |
1652 | } | |
1653 | ||
80a881b2 SH |
1654 | static int setup_mount(const struct lxc_rootfs *rootfs, const char *fstab, |
1655 | const char *lxc_name) | |
e7938e9e MN |
1656 | { |
1657 | FILE *file; | |
1658 | int ret; | |
1659 | ||
1660 | if (!fstab) | |
1661 | return 0; | |
1662 | ||
1663 | file = setmntent(fstab, "r"); | |
1664 | if (!file) { | |
1665 | SYSERROR("failed to use '%s'", fstab); | |
1666 | return -1; | |
1667 | } | |
1668 | ||
80a881b2 | 1669 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e | 1670 | |
0ad19a3f | 1671 | endmntent(file); |
1672 | return ret; | |
1673 | } | |
1674 | ||
80a881b2 SH |
1675 | static int setup_mount_entries(const struct lxc_rootfs *rootfs, struct lxc_list *mount, |
1676 | const char *lxc_name) | |
e7938e9e MN |
1677 | { |
1678 | FILE *file; | |
1679 | struct lxc_list *iterator; | |
1680 | char *mount_entry; | |
1681 | int ret; | |
1682 | ||
1683 | file = tmpfile(); | |
1684 | if (!file) { | |
1685 | ERROR("tmpfile error: %m"); | |
1686 | return -1; | |
1687 | } | |
1688 | ||
1689 | lxc_list_for_each(iterator, mount) { | |
1690 | mount_entry = iterator->elem; | |
1d6b1976 | 1691 | fprintf(file, "%s\n", mount_entry); |
e7938e9e MN |
1692 | } |
1693 | ||
1694 | rewind(file); | |
1695 | ||
80a881b2 | 1696 | ret = mount_file_entries(rootfs, file, lxc_name); |
e7938e9e MN |
1697 | |
1698 | fclose(file); | |
1699 | return ret; | |
1700 | } | |
1701 | ||
81810dd1 DL |
1702 | static int setup_caps(struct lxc_list *caps) |
1703 | { | |
1704 | struct lxc_list *iterator; | |
1705 | char *drop_entry; | |
d55bc1ad | 1706 | char *ptr; |
81810dd1 DL |
1707 | int i, capid; |
1708 | ||
1709 | lxc_list_for_each(iterator, caps) { | |
1710 | ||
1711 | drop_entry = iterator->elem; | |
1712 | ||
1713 | capid = -1; | |
1714 | ||
1715 | for (i = 0; i < sizeof(caps_opt)/sizeof(caps_opt[0]); i++) { | |
1716 | ||
1717 | if (strcmp(drop_entry, caps_opt[i].name)) | |
1718 | continue; | |
1719 | ||
1720 | capid = caps_opt[i].value; | |
1721 | break; | |
1722 | } | |
1723 | ||
d55bc1ad CS |
1724 | if (capid < 0) { |
1725 | /* try to see if it's numeric, so the user may specify | |
1726 | * capabilities that the running kernel knows about but | |
1727 | * we don't */ | |
1728 | capid = strtol(drop_entry, &ptr, 10); | |
1729 | if (!ptr || *ptr != '\0' || | |
1730 | capid == LONG_MIN || capid == LONG_MAX) | |
1731 | /* not a valid number */ | |
1732 | capid = -1; | |
1733 | else if (capid > lxc_caps_last_cap()) | |
1734 | /* we have a number but it's not a valid | |
1735 | * capability */ | |
1736 | capid = -1; | |
1737 | } | |
1738 | ||
81810dd1 | 1739 | if (capid < 0) { |
1e11be34 DL |
1740 | ERROR("unknown capability %s", drop_entry); |
1741 | return -1; | |
81810dd1 DL |
1742 | } |
1743 | ||
1744 | DEBUG("drop capability '%s' (%d)", drop_entry, capid); | |
1745 | ||
1746 | if (prctl(PR_CAPBSET_DROP, capid, 0, 0, 0)) { | |
1747 | SYSERROR("failed to remove %s capability", drop_entry); | |
1748 | return -1; | |
1749 | } | |
1750 | ||
1751 | } | |
1752 | ||
1753 | DEBUG("capabilities has been setup"); | |
1754 | ||
1755 | return 0; | |
1756 | } | |
1757 | ||
0ad19a3f | 1758 | static int setup_hw_addr(char *hwaddr, const char *ifname) |
1759 | { | |
1760 | struct sockaddr sockaddr; | |
1761 | struct ifreq ifr; | |
1762 | int ret, fd; | |
1763 | ||
3cfc0f3a MN |
1764 | ret = lxc_convert_mac(hwaddr, &sockaddr); |
1765 | if (ret) { | |
1766 | ERROR("mac address '%s' conversion failed : %s", | |
1767 | hwaddr, strerror(-ret)); | |
0ad19a3f | 1768 | return -1; |
1769 | } | |
1770 | ||
1771 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
1772 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
1773 | ||
1774 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
1775 | if (fd < 0) { | |
3ab87b66 | 1776 | ERROR("socket failure : %s", strerror(errno)); |
0ad19a3f | 1777 | return -1; |
1778 | } | |
1779 | ||
1780 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
1781 | close(fd); | |
1782 | if (ret) | |
3ab87b66 | 1783 | ERROR("ioctl failure : %s", strerror(errno)); |
0ad19a3f | 1784 | |
cd54d859 DL |
1785 | DEBUG("mac address '%s' on '%s' has been setup", hwaddr, ifname); |
1786 | ||
0ad19a3f | 1787 | return ret; |
1788 | } | |
1789 | ||
82d5ae15 | 1790 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1791 | { |
82d5ae15 DL |
1792 | struct lxc_list *iterator; |
1793 | struct lxc_inetdev *inetdev; | |
3cfc0f3a | 1794 | int err; |
0ad19a3f | 1795 | |
82d5ae15 DL |
1796 | lxc_list_for_each(iterator, ip) { |
1797 | ||
1798 | inetdev = iterator->elem; | |
1799 | ||
0093bb8c DL |
1800 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, |
1801 | &inetdev->bcast, inetdev->prefix); | |
3cfc0f3a MN |
1802 | if (err) { |
1803 | ERROR("failed to setup_ipv4_addr ifindex %d : %s", | |
1804 | ifindex, strerror(-err)); | |
82d5ae15 DL |
1805 | return -1; |
1806 | } | |
1807 | } | |
1808 | ||
1809 | return 0; | |
0ad19a3f | 1810 | } |
1811 | ||
82d5ae15 | 1812 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) |
0ad19a3f | 1813 | { |
82d5ae15 | 1814 | struct lxc_list *iterator; |
7fa9074f | 1815 | struct lxc_inet6dev *inet6dev; |
3cfc0f3a | 1816 | int err; |
0ad19a3f | 1817 | |
82d5ae15 DL |
1818 | lxc_list_for_each(iterator, ip) { |
1819 | ||
1820 | inet6dev = iterator->elem; | |
1821 | ||
b3df193c | 1822 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, |
0093bb8c DL |
1823 | &inet6dev->mcast, &inet6dev->acast, |
1824 | inet6dev->prefix); | |
3cfc0f3a MN |
1825 | if (err) { |
1826 | ERROR("failed to setup_ipv6_addr ifindex %d : %s", | |
1827 | ifindex, strerror(-err)); | |
82d5ae15 | 1828 | return -1; |
3cfc0f3a | 1829 | } |
82d5ae15 DL |
1830 | } |
1831 | ||
1832 | return 0; | |
0ad19a3f | 1833 | } |
1834 | ||
82d5ae15 | 1835 | static int setup_netdev(struct lxc_netdev *netdev) |
0ad19a3f | 1836 | { |
0ad19a3f | 1837 | char ifname[IFNAMSIZ]; |
0ad19a3f | 1838 | char *current_ifname = ifname; |
3cfc0f3a | 1839 | int err; |
0ad19a3f | 1840 | |
82d5ae15 DL |
1841 | /* empty network namespace */ |
1842 | if (!netdev->ifindex) { | |
b0efbac4 | 1843 | if (netdev->flags & IFF_UP) { |
d472214b | 1844 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1845 | if (err) { |
1846 | ERROR("failed to set the loopback up : %s", | |
1847 | strerror(-err)); | |
82d5ae15 DL |
1848 | return -1; |
1849 | } | |
82d5ae15 | 1850 | } |
7b57e8b6 | 1851 | return 0; |
0ad19a3f | 1852 | } |
13954cce | 1853 | |
82d5ae15 DL |
1854 | /* retrieve the name of the interface */ |
1855 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
36eb9bde | 1856 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1857 | netdev->ifindex); |
0ad19a3f | 1858 | return -1; |
1859 | } | |
13954cce | 1860 | |
018ef520 | 1861 | /* default: let the system to choose one interface name */ |
9d083402 | 1862 | if (!netdev->name) |
fb6d9b2f DL |
1863 | netdev->name = netdev->type == LXC_NET_PHYS ? |
1864 | netdev->link : "eth%d"; | |
018ef520 | 1865 | |
82d5ae15 | 1866 | /* rename the interface name */ |
b84f58b9 | 1867 | err = lxc_netdev_rename_by_name(ifname, netdev->name); |
3cfc0f3a MN |
1868 | if (err) { |
1869 | ERROR("failed to rename %s->%s : %s", ifname, netdev->name, | |
1870 | strerror(-err)); | |
018ef520 DL |
1871 | return -1; |
1872 | } | |
1873 | ||
1874 | /* Re-read the name of the interface because its name has changed | |
1875 | * and would be automatically allocated by the system | |
1876 | */ | |
82d5ae15 | 1877 | if (!if_indextoname(netdev->ifindex, current_ifname)) { |
018ef520 | 1878 | ERROR("no interface corresponding to index '%d'", |
82d5ae15 | 1879 | netdev->ifindex); |
018ef520 | 1880 | return -1; |
0ad19a3f | 1881 | } |
1882 | ||
82d5ae15 DL |
1883 | /* set a mac address */ |
1884 | if (netdev->hwaddr) { | |
1885 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
36eb9bde | 1886 | ERROR("failed to setup hw address for '%s'", |
82d5ae15 | 1887 | current_ifname); |
0ad19a3f | 1888 | return -1; |
1889 | } | |
1890 | } | |
1891 | ||
82d5ae15 DL |
1892 | /* setup ipv4 addresses on the interface */ |
1893 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
36eb9bde | 1894 | ERROR("failed to setup ip addresses for '%s'", |
0ad19a3f | 1895 | ifname); |
1896 | return -1; | |
1897 | } | |
1898 | ||
82d5ae15 DL |
1899 | /* setup ipv6 addresses on the interface */ |
1900 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
36eb9bde | 1901 | ERROR("failed to setup ipv6 addresses for '%s'", |
0ad19a3f | 1902 | ifname); |
1903 | return -1; | |
1904 | } | |
1905 | ||
82d5ae15 | 1906 | /* set the network device up */ |
b0efbac4 | 1907 | if (netdev->flags & IFF_UP) { |
3cfc0f3a MN |
1908 | int err; |
1909 | ||
d472214b | 1910 | err = lxc_netdev_up(current_ifname); |
3cfc0f3a MN |
1911 | if (err) { |
1912 | ERROR("failed to set '%s' up : %s", current_ifname, | |
1913 | strerror(-err)); | |
0ad19a3f | 1914 | return -1; |
1915 | } | |
1916 | ||
1917 | /* the network is up, make the loopback up too */ | |
d472214b | 1918 | err = lxc_netdev_up("lo"); |
3cfc0f3a MN |
1919 | if (err) { |
1920 | ERROR("failed to set the loopback up : %s", | |
1921 | strerror(-err)); | |
0ad19a3f | 1922 | return -1; |
1923 | } | |
1924 | } | |
1925 | ||
f8fee0e2 MK |
1926 | /* We can only set up the default routes after bringing |
1927 | * up the interface, sine bringing up the interface adds | |
1928 | * the link-local routes and we can't add a default | |
1929 | * route if the gateway is not reachable. */ | |
1930 | ||
1931 | /* setup ipv4 gateway on the interface */ | |
1932 | if (netdev->ipv4_gateway) { | |
1933 | if (!(netdev->flags & IFF_UP)) { | |
1934 | ERROR("Cannot add ipv4 gateway for %s when not bringing up the interface", ifname); | |
1935 | return -1; | |
1936 | } | |
1937 | ||
1938 | if (lxc_list_empty(&netdev->ipv4)) { | |
1939 | ERROR("Cannot add ipv4 gateway for %s when not assigning an address", ifname); | |
1940 | return -1; | |
1941 | } | |
1942 | ||
1943 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
1944 | if (err) { | |
1945 | ERROR("failed to setup ipv4 gateway for '%s': %s", | |
1946 | ifname, strerror(-err)); | |
19a26f82 MK |
1947 | if (netdev->ipv4_gateway_auto) { |
1948 | char buf[INET_ADDRSTRLEN]; | |
1949 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
1950 | ERROR("tried to set autodetected ipv4 gateway '%s'", buf); | |
1951 | } | |
f8fee0e2 MK |
1952 | return -1; |
1953 | } | |
1954 | } | |
1955 | ||
1956 | /* setup ipv6 gateway on the interface */ | |
1957 | if (netdev->ipv6_gateway) { | |
1958 | if (!(netdev->flags & IFF_UP)) { | |
1959 | ERROR("Cannot add ipv6 gateway for %s when not bringing up the interface", ifname); | |
1960 | return -1; | |
1961 | } | |
1962 | ||
1963 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
1964 | ERROR("Cannot add ipv6 gateway for %s when not assigning an address", ifname); | |
1965 | return -1; | |
1966 | } | |
1967 | ||
1968 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
1969 | if (err) { | |
1970 | ERROR("failed to setup ipv6 gateway for '%s': %s", | |
1971 | ifname, strerror(-err)); | |
19a26f82 MK |
1972 | if (netdev->ipv6_gateway_auto) { |
1973 | char buf[INET6_ADDRSTRLEN]; | |
72d0e1cb | 1974 | inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); |
19a26f82 MK |
1975 | ERROR("tried to set autodetected ipv6 gateway '%s'", buf); |
1976 | } | |
f8fee0e2 MK |
1977 | return -1; |
1978 | } | |
1979 | } | |
1980 | ||
cd54d859 DL |
1981 | DEBUG("'%s' has been setup", current_ifname); |
1982 | ||
0ad19a3f | 1983 | return 0; |
1984 | } | |
1985 | ||
5f4535a3 | 1986 | static int setup_network(struct lxc_list *network) |
0ad19a3f | 1987 | { |
82d5ae15 | 1988 | struct lxc_list *iterator; |
82d5ae15 | 1989 | struct lxc_netdev *netdev; |
0ad19a3f | 1990 | |
5f4535a3 | 1991 | lxc_list_for_each(iterator, network) { |
cd54d859 | 1992 | |
5f4535a3 | 1993 | netdev = iterator->elem; |
82d5ae15 DL |
1994 | |
1995 | if (setup_netdev(netdev)) { | |
1996 | ERROR("failed to setup netdev"); | |
1997 | return -1; | |
1998 | } | |
1999 | } | |
cd54d859 | 2000 | |
5f4535a3 DL |
2001 | if (!lxc_list_empty(network)) |
2002 | INFO("network has been setup"); | |
cd54d859 DL |
2003 | |
2004 | return 0; | |
0ad19a3f | 2005 | } |
2006 | ||
7b35f3d6 SH |
2007 | void lxc_rename_phys_nics_on_shutdown(struct lxc_conf *conf) |
2008 | { | |
2009 | int i; | |
2010 | ||
2011 | INFO("running to reset %d nic names", conf->num_savednics); | |
2012 | for (i=0; i<conf->num_savednics; i++) { | |
2013 | struct saved_nic *s = &conf->saved_nics[i]; | |
2014 | INFO("resetting nic %d to %s\n", s->ifindex, s->orig_name); | |
2015 | lxc_netdev_rename_by_index(s->ifindex, s->orig_name); | |
2016 | free(s->orig_name); | |
2017 | } | |
2018 | conf->num_savednics = 0; | |
2019 | free(conf->saved_nics); | |
2020 | } | |
2021 | ||
49684c0b CS |
2022 | static int setup_private_host_hw_addr(char *veth1) |
2023 | { | |
2024 | struct ifreq ifr; | |
2025 | int err; | |
2026 | int sockfd; | |
2027 | ||
2028 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
2029 | if (sockfd < 0) | |
2030 | return -errno; | |
2031 | ||
2032 | snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); | |
2033 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); | |
2034 | if (err < 0) { | |
2035 | close(sockfd); | |
2036 | return -errno; | |
2037 | } | |
2038 | ||
2039 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2040 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
2041 | close(sockfd); | |
2042 | if (err < 0) | |
2043 | return -errno; | |
2044 | ||
7ad84da7 DL |
2045 | DEBUG("mac address of host interface '%s' changed to private " |
2046 | "%02x:%02x:%02x:%02x:%02x:%02x", veth1, | |
2047 | ifr.ifr_hwaddr.sa_data[0] & 0xff, | |
2048 | ifr.ifr_hwaddr.sa_data[1] & 0xff, | |
2049 | ifr.ifr_hwaddr.sa_data[2] & 0xff, | |
2050 | ifr.ifr_hwaddr.sa_data[3] & 0xff, | |
2051 | ifr.ifr_hwaddr.sa_data[4] & 0xff, | |
2052 | ifr.ifr_hwaddr.sa_data[5] & 0xff); | |
49684c0b CS |
2053 | |
2054 | return 0; | |
2055 | } | |
2056 | ||
ae9242c8 SH |
2057 | static char *default_rootfs_mount = LXCROOTFSMOUNT; |
2058 | ||
7b379ab3 | 2059 | struct lxc_conf *lxc_conf_init(void) |
089cd8b8 | 2060 | { |
7b379ab3 | 2061 | struct lxc_conf *new; |
26ddeedd | 2062 | int i; |
7b379ab3 MN |
2063 | |
2064 | new = malloc(sizeof(*new)); | |
2065 | if (!new) { | |
2066 | ERROR("lxc_conf_init : %m"); | |
2067 | return NULL; | |
2068 | } | |
2069 | memset(new, 0, sizeof(*new)); | |
2070 | ||
cccc74b5 | 2071 | new->personality = -1; |
596a818d DE |
2072 | new->console.log_path = NULL; |
2073 | new->console.log_fd = -1; | |
28a4b0e5 | 2074 | new->console.path = NULL; |
63376d7d DL |
2075 | new->console.peer = -1; |
2076 | new->console.master = -1; | |
2077 | new->console.slave = -1; | |
2078 | new->console.name[0] = '\0'; | |
d2e30e99 | 2079 | new->maincmd_fd = -1; |
ae9242c8 | 2080 | new->rootfs.mount = default_rootfs_mount; |
2f3f41d0 | 2081 | new->kmsg = 1; |
7b379ab3 MN |
2082 | lxc_list_init(&new->cgroup); |
2083 | lxc_list_init(&new->network); | |
2084 | lxc_list_init(&new->mount_list); | |
81810dd1 | 2085 | lxc_list_init(&new->caps); |
f6d3e3e4 | 2086 | lxc_list_init(&new->id_map); |
26ddeedd SH |
2087 | for (i=0; i<NUM_LXC_HOOKS; i++) |
2088 | lxc_list_init(&new->hooks[i]); | |
e075f5d9 SH |
2089 | #if HAVE_APPARMOR |
2090 | new->aa_profile = NULL; | |
2091 | #endif | |
2092 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ | |
2093 | new->lsm_umount_proc = 0; | |
2094 | #endif | |
7b379ab3 MN |
2095 | |
2096 | return new; | |
089cd8b8 DL |
2097 | } |
2098 | ||
e3b4c4c4 | 2099 | static int instanciate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2100 | { |
8634bc19 | 2101 | char veth1buf[IFNAMSIZ], *veth1; |
0e391e57 | 2102 | char veth2buf[IFNAMSIZ], *veth2; |
3cfc0f3a | 2103 | int err; |
13954cce | 2104 | |
e892973e DL |
2105 | if (netdev->priv.veth_attr.pair) |
2106 | veth1 = netdev->priv.veth_attr.pair; | |
8634bc19 | 2107 | else { |
9ba8130c SH |
2108 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); |
2109 | if (err >= sizeof(veth1buf)) { /* can't *really* happen, but... */ | |
2110 | ERROR("veth1 name too long"); | |
2111 | return -1; | |
2112 | } | |
0e391e57 | 2113 | veth1 = mktemp(veth1buf); |
74a2b586 JK |
2114 | /* store away for deconf */ |
2115 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
8634bc19 | 2116 | } |
82d5ae15 | 2117 | |
0e391e57 DL |
2118 | snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
2119 | veth2 = mktemp(veth2buf); | |
82d5ae15 DL |
2120 | |
2121 | if (!strlen(veth1) || !strlen(veth2)) { | |
2122 | ERROR("failed to allocate a temporary name"); | |
2123 | return -1; | |
0ad19a3f | 2124 | } |
2125 | ||
3cfc0f3a MN |
2126 | err = lxc_veth_create(veth1, veth2); |
2127 | if (err) { | |
2128 | ERROR("failed to create %s-%s : %s", veth1, veth2, | |
2129 | strerror(-err)); | |
6ab9ab6d | 2130 | return -1; |
0ad19a3f | 2131 | } |
13954cce | 2132 | |
49684c0b CS |
2133 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
2134 | * will always keep the host's mac address and not take the mac address | |
2135 | * of a container */ | |
2136 | err = setup_private_host_hw_addr(veth1); | |
2137 | if (err) { | |
2138 | ERROR("failed to change mac address of host interface '%s' : %s", | |
2139 | veth1, strerror(-err)); | |
2140 | goto out_delete; | |
2141 | } | |
2142 | ||
82d5ae15 | 2143 | if (netdev->mtu) { |
d472214b | 2144 | err = lxc_netdev_set_mtu(veth1, atoi(netdev->mtu)); |
3cfc0f3a | 2145 | if (!err) |
d472214b | 2146 | err = lxc_netdev_set_mtu(veth2, atoi(netdev->mtu)); |
3cfc0f3a MN |
2147 | if (err) { |
2148 | ERROR("failed to set mtu '%s' for %s-%s : %s", | |
2149 | netdev->mtu, veth1, veth2, strerror(-err)); | |
eb14c10a | 2150 | goto out_delete; |
75d09f83 DL |
2151 | } |
2152 | } | |
2153 | ||
3cfc0f3a MN |
2154 | if (netdev->link) { |
2155 | err = lxc_bridge_attach(netdev->link, veth1); | |
2156 | if (err) { | |
2157 | ERROR("failed to attach '%s' to the bridge '%s' : %s", | |
2158 | veth1, netdev->link, strerror(-err)); | |
2159 | goto out_delete; | |
2160 | } | |
eb14c10a DL |
2161 | } |
2162 | ||
82d5ae15 DL |
2163 | netdev->ifindex = if_nametoindex(veth2); |
2164 | if (!netdev->ifindex) { | |
36eb9bde | 2165 | ERROR("failed to retrieve the index for %s", veth2); |
eb14c10a DL |
2166 | goto out_delete; |
2167 | } | |
2168 | ||
d472214b | 2169 | err = lxc_netdev_up(veth1); |
6e35af2e DL |
2170 | if (err) { |
2171 | ERROR("failed to set %s up : %s", veth1, strerror(-err)); | |
2172 | goto out_delete; | |
0ad19a3f | 2173 | } |
2174 | ||
e3b4c4c4 | 2175 | if (netdev->upscript) { |
751d9dcd DL |
2176 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2177 | "veth", veth1, (char*) NULL); | |
2178 | if (err) | |
e3b4c4c4 | 2179 | goto out_delete; |
e3b4c4c4 ST |
2180 | } |
2181 | ||
82d5ae15 DL |
2182 | DEBUG("instanciated veth '%s/%s', index is '%d'", |
2183 | veth1, veth2, netdev->ifindex); | |
2184 | ||
6ab9ab6d | 2185 | return 0; |
eb14c10a DL |
2186 | |
2187 | out_delete: | |
b84f58b9 | 2188 | lxc_netdev_delete_by_name(veth1); |
6ab9ab6d | 2189 | return -1; |
13954cce | 2190 | } |
d957ae2d | 2191 | |
74a2b586 JK |
2192 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2193 | { | |
2194 | char *veth1; | |
2195 | int err; | |
2196 | ||
2197 | if (netdev->priv.veth_attr.pair) | |
2198 | veth1 = netdev->priv.veth_attr.pair; | |
2199 | else | |
2200 | veth1 = netdev->priv.veth_attr.veth1; | |
2201 | ||
2202 | if (netdev->downscript) { | |
2203 | err = run_script(handler->name, "net", netdev->downscript, | |
2204 | "down", "veth", veth1, (char*) NULL); | |
2205 | if (err) | |
2206 | return -1; | |
2207 | } | |
2208 | return 0; | |
2209 | } | |
2210 | ||
e3b4c4c4 | 2211 | static int instanciate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2212 | { |
0e391e57 | 2213 | char peerbuf[IFNAMSIZ], *peer; |
3cfc0f3a | 2214 | int err; |
d957ae2d MT |
2215 | |
2216 | if (!netdev->link) { | |
2217 | ERROR("no link specified for macvlan netdev"); | |
2218 | return -1; | |
2219 | } | |
13954cce | 2220 | |
9ba8130c SH |
2221 | err = snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); |
2222 | if (err >= sizeof(peerbuf)) | |
2223 | return -1; | |
82d5ae15 | 2224 | |
0e391e57 | 2225 | peer = mktemp(peerbuf); |
82d5ae15 DL |
2226 | if (!strlen(peer)) { |
2227 | ERROR("failed to make a temporary name"); | |
2228 | return -1; | |
0ad19a3f | 2229 | } |
2230 | ||
3cfc0f3a MN |
2231 | err = lxc_macvlan_create(netdev->link, peer, |
2232 | netdev->priv.macvlan_attr.mode); | |
2233 | if (err) { | |
2234 | ERROR("failed to create macvlan interface '%s' on '%s' : %s", | |
2235 | peer, netdev->link, strerror(-err)); | |
d957ae2d | 2236 | return -1; |
0ad19a3f | 2237 | } |
2238 | ||
82d5ae15 DL |
2239 | netdev->ifindex = if_nametoindex(peer); |
2240 | if (!netdev->ifindex) { | |
36eb9bde | 2241 | ERROR("failed to retrieve the index for %s", peer); |
b84f58b9 | 2242 | lxc_netdev_delete_by_name(peer); |
d957ae2d | 2243 | return -1; |
22ebac19 | 2244 | } |
2245 | ||
e3b4c4c4 | 2246 | if (netdev->upscript) { |
751d9dcd DL |
2247 | err = run_script(handler->name, "net", netdev->upscript, "up", |
2248 | "macvlan", netdev->link, (char*) NULL); | |
2249 | if (err) | |
e3b4c4c4 | 2250 | return -1; |
e3b4c4c4 ST |
2251 | } |
2252 | ||
e892973e DL |
2253 | DEBUG("instanciated macvlan '%s', index is '%d' and mode '%d'", |
2254 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
0ad19a3f | 2255 | |
d957ae2d | 2256 | return 0; |
0ad19a3f | 2257 | } |
2258 | ||
74a2b586 JK |
2259 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2260 | { | |
2261 | int err; | |
2262 | ||
2263 | if (netdev->downscript) { | |
2264 | err = run_script(handler->name, "net", netdev->downscript, | |
2265 | "down", "macvlan", netdev->link, | |
2266 | (char*) NULL); | |
2267 | if (err) | |
2268 | return -1; | |
2269 | } | |
2270 | return 0; | |
2271 | } | |
2272 | ||
26c39028 | 2273 | /* XXX: merge with instanciate_macvlan */ |
e3b4c4c4 | 2274 | static int instanciate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
26c39028 JHS |
2275 | { |
2276 | char peer[IFNAMSIZ]; | |
3cfc0f3a | 2277 | int err; |
26c39028 JHS |
2278 | |
2279 | if (!netdev->link) { | |
2280 | ERROR("no link specified for vlan netdev"); | |
2281 | return -1; | |
2282 | } | |
2283 | ||
9ba8130c SH |
2284 | err = snprintf(peer, sizeof(peer), "vlan%d", netdev->priv.vlan_attr.vid); |
2285 | if (err >= sizeof(peer)) { | |
2286 | ERROR("peer name too long"); | |
2287 | return -1; | |
2288 | } | |
26c39028 | 2289 | |
3cfc0f3a MN |
2290 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); |
2291 | if (err) { | |
2292 | ERROR("failed to create vlan interface '%s' on '%s' : %s", | |
2293 | peer, netdev->link, strerror(-err)); | |
26c39028 JHS |
2294 | return -1; |
2295 | } | |
2296 | ||
2297 | netdev->ifindex = if_nametoindex(peer); | |
2298 | if (!netdev->ifindex) { | |
2299 | ERROR("failed to retrieve the ifindex for %s", peer); | |
b84f58b9 | 2300 | lxc_netdev_delete_by_name(peer); |
26c39028 JHS |
2301 | return -1; |
2302 | } | |
2303 | ||
e892973e DL |
2304 | DEBUG("instanciated vlan '%s', ifindex is '%d'", " vlan1000", |
2305 | netdev->ifindex); | |
2306 | ||
26c39028 JHS |
2307 | return 0; |
2308 | } | |
2309 | ||
74a2b586 JK |
2310 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2311 | { | |
2312 | return 0; | |
2313 | } | |
2314 | ||
e3b4c4c4 | 2315 | static int instanciate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2316 | { |
6168e99f DL |
2317 | if (!netdev->link) { |
2318 | ERROR("no link specified for the physical interface"); | |
2319 | return -1; | |
2320 | } | |
2321 | ||
9d083402 | 2322 | netdev->ifindex = if_nametoindex(netdev->link); |
82d5ae15 | 2323 | if (!netdev->ifindex) { |
9d083402 | 2324 | ERROR("failed to retrieve the index for %s", netdev->link); |
0ad19a3f | 2325 | return -1; |
2326 | } | |
2327 | ||
e3b4c4c4 ST |
2328 | if (netdev->upscript) { |
2329 | int err; | |
751d9dcd DL |
2330 | err = run_script(handler->name, "net", netdev->upscript, |
2331 | "up", "phys", netdev->link, (char*) NULL); | |
2332 | if (err) | |
e3b4c4c4 | 2333 | return -1; |
e3b4c4c4 ST |
2334 | } |
2335 | ||
82d5ae15 | 2336 | return 0; |
0ad19a3f | 2337 | } |
2338 | ||
74a2b586 JK |
2339 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2340 | { | |
2341 | int err; | |
2342 | ||
2343 | if (netdev->downscript) { | |
2344 | err = run_script(handler->name, "net", netdev->downscript, | |
2345 | "down", "phys", netdev->link, (char*) NULL); | |
2346 | if (err) | |
2347 | return -1; | |
2348 | } | |
2349 | return 0; | |
2350 | } | |
2351 | ||
e3b4c4c4 | 2352 | static int instanciate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
0ad19a3f | 2353 | { |
82d5ae15 | 2354 | netdev->ifindex = 0; |
e3b4c4c4 ST |
2355 | if (netdev->upscript) { |
2356 | int err; | |
751d9dcd DL |
2357 | err = run_script(handler->name, "net", netdev->upscript, |
2358 | "up", "empty", (char*) NULL); | |
2359 | if (err) | |
e3b4c4c4 | 2360 | return -1; |
e3b4c4c4 | 2361 | } |
82d5ae15 | 2362 | return 0; |
0ad19a3f | 2363 | } |
2364 | ||
74a2b586 JK |
2365 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) |
2366 | { | |
2367 | int err; | |
2368 | ||
2369 | if (netdev->downscript) { | |
2370 | err = run_script(handler->name, "net", netdev->downscript, | |
2371 | "down", "empty", (char*) NULL); | |
2372 | if (err) | |
2373 | return -1; | |
2374 | } | |
2375 | return 0; | |
2376 | } | |
2377 | ||
e3b4c4c4 | 2378 | int lxc_create_network(struct lxc_handler *handler) |
0ad19a3f | 2379 | { |
e3b4c4c4 | 2380 | struct lxc_list *network = &handler->conf->network; |
82d5ae15 | 2381 | struct lxc_list *iterator; |
82d5ae15 | 2382 | struct lxc_netdev *netdev; |
0ad19a3f | 2383 | |
5f4535a3 | 2384 | lxc_list_for_each(iterator, network) { |
0ad19a3f | 2385 | |
5f4535a3 | 2386 | netdev = iterator->elem; |
13954cce | 2387 | |
24654103 | 2388 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { |
82d5ae15 | 2389 | ERROR("invalid network configuration type '%d'", |
5f4535a3 | 2390 | netdev->type); |
82d5ae15 DL |
2391 | return -1; |
2392 | } | |
0ad19a3f | 2393 | |
e3b4c4c4 | 2394 | if (netdev_conf[netdev->type](handler, netdev)) { |
82d5ae15 DL |
2395 | ERROR("failed to create netdev"); |
2396 | return -1; | |
2397 | } | |
e3b4c4c4 | 2398 | |
0ad19a3f | 2399 | } |
2400 | ||
2401 | return 0; | |
2402 | } | |
2403 | ||
74a2b586 | 2404 | void lxc_delete_network(struct lxc_handler *handler) |
7fef7a06 | 2405 | { |
74a2b586 | 2406 | struct lxc_list *network = &handler->conf->network; |
7fef7a06 DL |
2407 | struct lxc_list *iterator; |
2408 | struct lxc_netdev *netdev; | |
2409 | ||
2410 | lxc_list_for_each(iterator, network) { | |
2411 | netdev = iterator->elem; | |
d472214b | 2412 | |
74a2b586 | 2413 | if (netdev->ifindex != 0 && netdev->type == LXC_NET_PHYS) { |
d8f8e352 DL |
2414 | if (lxc_netdev_rename_by_index(netdev->ifindex, netdev->link)) |
2415 | WARN("failed to rename to the initial name the " \ | |
2416 | "netdev '%s'", netdev->link); | |
d472214b | 2417 | continue; |
d8f8e352 | 2418 | } |
d472214b | 2419 | |
74a2b586 JK |
2420 | if (netdev_deconf[netdev->type](handler, netdev)) { |
2421 | WARN("failed to destroy netdev"); | |
2422 | } | |
2423 | ||
d8f8e352 DL |
2424 | /* Recent kernel remove the virtual interfaces when the network |
2425 | * namespace is destroyed but in case we did not moved the | |
2426 | * interface to the network namespace, we have to destroy it | |
2427 | */ | |
74a2b586 JK |
2428 | if (netdev->ifindex != 0 && |
2429 | lxc_netdev_delete_by_index(netdev->ifindex)) | |
d8f8e352 | 2430 | WARN("failed to remove interface '%s'", netdev->name); |
7fef7a06 DL |
2431 | } |
2432 | } | |
2433 | ||
5f4535a3 | 2434 | int lxc_assign_network(struct lxc_list *network, pid_t pid) |
0ad19a3f | 2435 | { |
82d5ae15 | 2436 | struct lxc_list *iterator; |
82d5ae15 | 2437 | struct lxc_netdev *netdev; |
3cfc0f3a | 2438 | int err; |
0ad19a3f | 2439 | |
5f4535a3 | 2440 | lxc_list_for_each(iterator, network) { |
82d5ae15 | 2441 | |
5f4535a3 | 2442 | netdev = iterator->elem; |
82d5ae15 | 2443 | |
236087a6 DL |
2444 | /* empty network namespace, nothing to move */ |
2445 | if (!netdev->ifindex) | |
2446 | continue; | |
2447 | ||
d472214b | 2448 | err = lxc_netdev_move_by_index(netdev->ifindex, pid); |
3cfc0f3a MN |
2449 | if (err) { |
2450 | ERROR("failed to move '%s' to the container : %s", | |
2451 | netdev->link, strerror(-err)); | |
82d5ae15 DL |
2452 | return -1; |
2453 | } | |
2454 | ||
c1c75c04 | 2455 | DEBUG("move '%s' to '%d'", netdev->name, pid); |
0ad19a3f | 2456 | } |
2457 | ||
2458 | return 0; | |
2459 | } | |
2460 | ||
251d0d2a DE |
2461 | static int write_id_mapping(enum idtype idtype, pid_t pid, const char *buf, |
2462 | size_t buf_size) | |
f6d3e3e4 SH |
2463 | { |
2464 | char path[PATH_MAX]; | |
e4ccd113 | 2465 | int ret, closeret; |
f6d3e3e4 SH |
2466 | FILE *f; |
2467 | ||
2468 | ret = snprintf(path, PATH_MAX, "/proc/%d/%cid_map", pid, idtype == ID_TYPE_UID ? 'u' : 'g'); | |
2469 | if (ret < 0 || ret >= PATH_MAX) { | |
2470 | fprintf(stderr, "%s: path name too long", __func__); | |
2471 | return -E2BIG; | |
2472 | } | |
2473 | f = fopen(path, "w"); | |
2474 | if (!f) { | |
2475 | perror("open"); | |
2476 | return -EINVAL; | |
2477 | } | |
251d0d2a | 2478 | ret = fwrite(buf, buf_size, 1, f); |
f6d3e3e4 | 2479 | if (ret < 0) |
e4ccd113 SH |
2480 | SYSERROR("writing id mapping"); |
2481 | closeret = fclose(f); | |
2482 | if (closeret) | |
2483 | SYSERROR("writing id mapping"); | |
2484 | return ret < 0 ? ret : closeret; | |
f6d3e3e4 SH |
2485 | } |
2486 | ||
2487 | int lxc_map_ids(struct lxc_list *idmap, pid_t pid) | |
2488 | { | |
2489 | struct lxc_list *iterator; | |
2490 | struct id_map *map; | |
2491 | int ret = 0; | |
251d0d2a | 2492 | enum idtype type; |
4f7521b4 | 2493 | char *buf = NULL, *pos; |
251d0d2a DE |
2494 | |
2495 | for(type = ID_TYPE_UID; type <= ID_TYPE_GID; type++) { | |
4f7521b4 SH |
2496 | int left, fill; |
2497 | ||
2498 | pos = buf; | |
251d0d2a | 2499 | lxc_list_for_each(iterator, idmap) { |
4f7521b4 SH |
2500 | /* The kernel only takes <= 4k for writes to /proc/<nr>/[ug]id_map */ |
2501 | if (!buf) | |
2502 | buf = pos = malloc(4096); | |
2503 | if (!buf) | |
2504 | return -ENOMEM; | |
2505 | ||
251d0d2a DE |
2506 | map = iterator->elem; |
2507 | if (map->idtype == type) { | |
2508 | left = 4096 - (pos - buf); | |
2509 | fill = snprintf(pos, left, "%lu %lu %lu\n", | |
2510 | map->nsid, map->hostid, map->range); | |
2511 | if (fill <= 0 || fill >= left) | |
2512 | SYSERROR("snprintf failed, too many mappings"); | |
2513 | pos += fill; | |
2514 | } | |
2515 | } | |
4f7521b4 SH |
2516 | if (pos == buf) // no mappings were found |
2517 | continue; | |
251d0d2a | 2518 | ret = write_id_mapping(type, pid, buf, pos-buf); |
f6d3e3e4 SH |
2519 | if (ret) |
2520 | break; | |
2521 | } | |
251d0d2a | 2522 | |
4f7521b4 SH |
2523 | if (buf) |
2524 | free(buf); | |
f6d3e3e4 SH |
2525 | return ret; |
2526 | } | |
2527 | ||
19a26f82 MK |
2528 | int lxc_find_gateway_addresses(struct lxc_handler *handler) |
2529 | { | |
2530 | struct lxc_list *network = &handler->conf->network; | |
2531 | struct lxc_list *iterator; | |
2532 | struct lxc_netdev *netdev; | |
2533 | int link_index; | |
2534 | ||
2535 | lxc_list_for_each(iterator, network) { | |
2536 | netdev = iterator->elem; | |
2537 | ||
2538 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2539 | continue; | |
2540 | ||
2541 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
2542 | ERROR("gateway = auto only supported for " | |
2543 | "veth and macvlan"); | |
2544 | return -1; | |
2545 | } | |
2546 | ||
2547 | if (!netdev->link) { | |
2548 | ERROR("gateway = auto needs a link interface"); | |
2549 | return -1; | |
2550 | } | |
2551 | ||
2552 | link_index = if_nametoindex(netdev->link); | |
2553 | if (!link_index) | |
2554 | return -EINVAL; | |
2555 | ||
2556 | if (netdev->ipv4_gateway_auto) { | |
2557 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
2558 | ERROR("failed to automatically find ipv4 gateway " | |
2559 | "address from link interface '%s'", netdev->link); | |
2560 | return -1; | |
2561 | } | |
2562 | } | |
2563 | ||
2564 | if (netdev->ipv6_gateway_auto) { | |
2565 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
2566 | ERROR("failed to automatically find ipv6 gateway " | |
2567 | "address from link interface '%s'", netdev->link); | |
2568 | return -1; | |
2569 | } | |
2570 | } | |
2571 | } | |
2572 | ||
2573 | return 0; | |
2574 | } | |
2575 | ||
5e4a62bf | 2576 | int lxc_create_tty(const char *name, struct lxc_conf *conf) |
b0a33c1e | 2577 | { |
5e4a62bf | 2578 | struct lxc_tty_info *tty_info = &conf->tty_info; |
985d15b1 | 2579 | int i; |
b0a33c1e | 2580 | |
5e4a62bf DL |
2581 | /* no tty in the configuration */ |
2582 | if (!conf->tty) | |
b0a33c1e | 2583 | return 0; |
2584 | ||
13954cce | 2585 | tty_info->pty_info = |
e4e7d59d | 2586 | malloc(sizeof(*tty_info->pty_info)*conf->tty); |
b0a33c1e | 2587 | if (!tty_info->pty_info) { |
36eb9bde | 2588 | SYSERROR("failed to allocate pty_info"); |
985d15b1 | 2589 | return -1; |
b0a33c1e | 2590 | } |
2591 | ||
985d15b1 | 2592 | for (i = 0; i < conf->tty; i++) { |
13954cce | 2593 | |
b0a33c1e | 2594 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; |
2595 | ||
13954cce | 2596 | if (openpty(&pty_info->master, &pty_info->slave, |
b0a33c1e | 2597 | pty_info->name, NULL, NULL)) { |
36eb9bde | 2598 | SYSERROR("failed to create pty #%d", i); |
985d15b1 MT |
2599 | tty_info->nbtty = i; |
2600 | lxc_delete_tty(tty_info); | |
2601 | return -1; | |
b0a33c1e | 2602 | } |
2603 | ||
5332bb84 DL |
2604 | DEBUG("allocated pty '%s' (%d/%d)", |
2605 | pty_info->name, pty_info->master, pty_info->slave); | |
2606 | ||
b035ad62 MS |
2607 | /* Prevent leaking the file descriptors to the container */ |
2608 | fcntl(pty_info->master, F_SETFD, FD_CLOEXEC); | |
2609 | fcntl(pty_info->slave, F_SETFD, FD_CLOEXEC); | |
2610 | ||
b0a33c1e | 2611 | pty_info->busy = 0; |
2612 | } | |
2613 | ||
985d15b1 | 2614 | tty_info->nbtty = conf->tty; |
1ac470c0 DL |
2615 | |
2616 | INFO("tty's configured"); | |
2617 | ||
985d15b1 | 2618 | return 0; |
b0a33c1e | 2619 | } |
2620 | ||
2621 | void lxc_delete_tty(struct lxc_tty_info *tty_info) | |
2622 | { | |
2623 | int i; | |
2624 | ||
2625 | for (i = 0; i < tty_info->nbtty; i++) { | |
2626 | struct lxc_pty_info *pty_info = &tty_info->pty_info[i]; | |
2627 | ||
2628 | close(pty_info->master); | |
2629 | close(pty_info->slave); | |
2630 | } | |
2631 | ||
2632 | free(tty_info->pty_info); | |
2633 | tty_info->nbtty = 0; | |
2634 | } | |
2635 | ||
f6d3e3e4 SH |
2636 | /* |
2637 | * given a host uid, return the ns uid if it is mapped. | |
2638 | * if it is not mapped, return the original host id. | |
2639 | */ | |
2640 | static int shiftid(struct lxc_conf *c, int uid, enum idtype w) | |
2641 | { | |
2642 | struct lxc_list *iterator; | |
2643 | struct id_map *map; | |
2644 | int low, high; | |
2645 | ||
2646 | lxc_list_for_each(iterator, &c->id_map) { | |
2647 | map = iterator->elem; | |
2648 | if (map->idtype != w) | |
2649 | continue; | |
2650 | ||
2651 | low = map->nsid; | |
2652 | high = map->nsid + map->range; | |
2653 | if (uid < low || uid >= high) | |
2654 | continue; | |
2655 | ||
2656 | return uid - low + map->hostid; | |
2657 | } | |
2658 | ||
2659 | return uid; | |
2660 | } | |
2661 | ||
2662 | /* | |
2663 | * Take a pathname for a file created on the host, and map the uid and gid | |
2664 | * into the container if needed. (Used for ttys) | |
2665 | */ | |
2666 | static int uid_shift_file(char *path, struct lxc_conf *c) | |
2667 | { | |
2668 | struct stat statbuf; | |
2669 | int newuid, newgid; | |
2670 | ||
2671 | if (stat(path, &statbuf)) { | |
2672 | SYSERROR("stat(%s)", path); | |
2673 | return -1; | |
2674 | } | |
2675 | ||
2676 | newuid = shiftid(c, statbuf.st_uid, ID_TYPE_UID); | |
2677 | newgid = shiftid(c, statbuf.st_gid, ID_TYPE_GID); | |
2678 | if (newuid != statbuf.st_uid || newgid != statbuf.st_gid) { | |
20087962 | 2679 | DEBUG("chowning %s from %d:%d to %d:%d\n", path, (int)statbuf.st_uid, (int)statbuf.st_gid, newuid, newgid); |
f6d3e3e4 SH |
2680 | if (chown(path, newuid, newgid)) { |
2681 | SYSERROR("chown(%s)", path); | |
2682 | return -1; | |
2683 | } | |
2684 | } | |
2685 | return 0; | |
2686 | } | |
2687 | ||
2688 | int uid_shift_ttys(int pid, struct lxc_conf *conf) | |
2689 | { | |
2690 | int i, ret; | |
2691 | struct lxc_tty_info *tty_info = &conf->tty_info; | |
2692 | char path[MAXPATHLEN]; | |
2693 | char *ttydir = conf->ttydir; | |
2694 | ||
2695 | if (!conf->rootfs.path) | |
2696 | return 0; | |
2697 | /* first the console */ | |
2698 | ret = snprintf(path, sizeof(path), "/proc/%d/root/dev/%s/console", pid, ttydir ? ttydir : ""); | |
2699 | if (ret < 0 || ret >= sizeof(path)) { | |
2700 | ERROR("console path too long\n"); | |
2701 | return -1; | |
2702 | } | |
2703 | if (uid_shift_file(path, conf)) { | |
2704 | DEBUG("Failed to chown the console %s.\n", path); | |
2705 | return -1; | |
2706 | } | |
2707 | for (i=0; i< tty_info->nbtty; i++) { | |
2708 | ret = snprintf(path, sizeof(path), "/proc/%d/root/dev/%s/tty%d", | |
2709 | pid, ttydir ? ttydir : "", i + 1); | |
2710 | if (ret < 0 || ret >= sizeof(path)) { | |
2711 | ERROR("pathname too long for ttys"); | |
2712 | return -1; | |
2713 | } | |
2714 | if (uid_shift_file(path, conf)) { | |
2715 | DEBUG("Failed to chown pty %s.\n", path); | |
2716 | return -1; | |
2717 | } | |
2718 | } | |
2719 | ||
2720 | return 0; | |
2721 | } | |
2722 | ||
571e6ec8 | 2723 | int lxc_setup(const char *name, struct lxc_conf *lxc_conf) |
0ad19a3f | 2724 | { |
e075f5d9 SH |
2725 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
2726 | int mounted; | |
2727 | #endif | |
2728 | ||
571e6ec8 | 2729 | if (setup_utsname(lxc_conf->utsname)) { |
36eb9bde | 2730 | ERROR("failed to setup the utsname for '%s'", name); |
95b5ffaf | 2731 | return -1; |
0ad19a3f | 2732 | } |
2733 | ||
5f4535a3 | 2734 | if (setup_network(&lxc_conf->network)) { |
36eb9bde | 2735 | ERROR("failed to setup the network for '%s'", name); |
95b5ffaf | 2736 | return -1; |
0ad19a3f | 2737 | } |
2738 | ||
89eaa05e SH |
2739 | if (run_lxc_hooks(name, "pre-mount", lxc_conf)) { |
2740 | ERROR("failed to run pre-mount hooks for container '%s'.", name); | |
2741 | return -1; | |
2742 | } | |
5ea6163a | 2743 | |
cc28d0b0 | 2744 | if (setup_rootfs(lxc_conf)) { |
ac778708 | 2745 | ERROR("failed to setup rootfs for '%s'", name); |
95b5ffaf | 2746 | return -1; |
0ad19a3f | 2747 | } |
2748 | ||
c6883f38 | 2749 | if (lxc_conf->autodev) { |
91c3830e SH |
2750 | if (mount_autodev(lxc_conf->rootfs.mount)) { |
2751 | ERROR("failed to mount /dev in the container"); | |
c6883f38 SH |
2752 | return -1; |
2753 | } | |
2754 | } | |
2755 | ||
80a881b2 | 2756 | if (setup_mount(&lxc_conf->rootfs, lxc_conf->fstab, name)) { |
36eb9bde | 2757 | ERROR("failed to setup the mounts for '%s'", name); |
95b5ffaf | 2758 | return -1; |
576f946d | 2759 | } |
2760 | ||
c1dc38c2 | 2761 | if (!lxc_list_empty(&lxc_conf->mount_list) && setup_mount_entries(&lxc_conf->rootfs, &lxc_conf->mount_list, name)) { |
e7938e9e MN |
2762 | ERROR("failed to setup the mount entries for '%s'", name); |
2763 | return -1; | |
2764 | } | |
2765 | ||
773fb9ca SH |
2766 | if (run_lxc_hooks(name, "mount", lxc_conf)) { |
2767 | ERROR("failed to run mount hooks for container '%s'.", name); | |
2768 | return -1; | |
2769 | } | |
2770 | ||
91c3830e | 2771 | if (lxc_conf->autodev) { |
f7bee6c6 MW |
2772 | if (run_lxc_hooks(name, "autodev", lxc_conf)) { |
2773 | ERROR("failed to run autodev hooks for container '%s'.", name); | |
2774 | return -1; | |
2775 | } | |
91c3830e SH |
2776 | if (setup_autodev(lxc_conf->rootfs.mount)) { |
2777 | ERROR("failed to populate /dev in the container"); | |
2778 | return -1; | |
2779 | } | |
2780 | } | |
2781 | ||
7c6ef2a2 | 2782 | if (setup_console(&lxc_conf->rootfs, &lxc_conf->console, lxc_conf->ttydir)) { |
36eb9bde | 2783 | ERROR("failed to setup the console for '%s'", name); |
95b5ffaf | 2784 | return -1; |
6e590161 | 2785 | } |
2786 | ||
7e0e1d94 AV |
2787 | if (lxc_conf->kmsg) { |
2788 | if (setup_kmsg(&lxc_conf->rootfs, &lxc_conf->console)) // don't fail | |
2789 | ERROR("failed to setup kmsg for '%s'", name); | |
2790 | } | |
1bd051a6 | 2791 | |
7c6ef2a2 | 2792 | if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) { |
36eb9bde | 2793 | ERROR("failed to setup the ttys for '%s'", name); |
95b5ffaf | 2794 | return -1; |
b0a33c1e | 2795 | } |
2796 | ||
e075f5d9 | 2797 | #if HAVE_APPARMOR /* || HAVE_SMACK || HAVE_SELINUX */ |
9ac3ffb5 SG |
2798 | INFO("rootfs path is .%s., mount is .%s.", lxc_conf->rootfs.path, |
2799 | lxc_conf->rootfs.mount); | |
2800 | if (lxc_conf->rootfs.path == NULL || strlen(lxc_conf->rootfs.path) == 0) | |
2801 | mounted = 0; | |
2802 | else | |
2803 | mounted = lsm_mount_proc_if_needed(lxc_conf->rootfs.path, lxc_conf->rootfs.mount); | |
e075f5d9 SH |
2804 | if (mounted == -1) { |
2805 | SYSERROR("failed to mount /proc in the container."); | |
2806 | return -1; | |
2807 | } else if (mounted == 1) { | |
2808 | lxc_conf->lsm_umount_proc = 1; | |
2809 | } | |
2810 | #endif | |
2811 | ||
ac778708 | 2812 | if (setup_pivot_root(&lxc_conf->rootfs)) { |
36eb9bde | 2813 | ERROR("failed to set rootfs for '%s'", name); |
95b5ffaf | 2814 | return -1; |
ed502555 | 2815 | } |
2816 | ||
571e6ec8 | 2817 | if (setup_pts(lxc_conf->pts)) { |
36eb9bde | 2818 | ERROR("failed to setup the new pts instance"); |
95b5ffaf | 2819 | return -1; |
3c26f34e | 2820 | } |
2821 | ||
cccc74b5 DL |
2822 | if (setup_personality(lxc_conf->personality)) { |
2823 | ERROR("failed to setup personality"); | |
2824 | return -1; | |
2825 | } | |
2826 | ||
f6d3e3e4 SH |
2827 | if (lxc_list_empty(&lxc_conf->id_map)) { |
2828 | if (setup_caps(&lxc_conf->caps)) { | |
2829 | ERROR("failed to drop capabilities"); | |
2830 | return -1; | |
2831 | } | |
81810dd1 DL |
2832 | } |
2833 | ||
cd54d859 DL |
2834 | NOTICE("'%s' is setup.", name); |
2835 | ||
0ad19a3f | 2836 | return 0; |
2837 | } | |
26ddeedd SH |
2838 | |
2839 | int run_lxc_hooks(const char *name, char *hook, struct lxc_conf *conf) | |
2840 | { | |
2841 | int which = -1; | |
2842 | struct lxc_list *it; | |
2843 | ||
2844 | if (strcmp(hook, "pre-start") == 0) | |
2845 | which = LXCHOOK_PRESTART; | |
5ea6163a SH |
2846 | else if (strcmp(hook, "pre-mount") == 0) |
2847 | which = LXCHOOK_PREMOUNT; | |
26ddeedd SH |
2848 | else if (strcmp(hook, "mount") == 0) |
2849 | which = LXCHOOK_MOUNT; | |
f7bee6c6 MW |
2850 | else if (strcmp(hook, "autodev") == 0) |
2851 | which = LXCHOOK_AUTODEV; | |
26ddeedd SH |
2852 | else if (strcmp(hook, "start") == 0) |
2853 | which = LXCHOOK_START; | |
2854 | else if (strcmp(hook, "post-stop") == 0) | |
2855 | which = LXCHOOK_POSTSTOP; | |
2856 | else | |
2857 | return -1; | |
2858 | lxc_list_for_each(it, &conf->hooks[which]) { | |
2859 | int ret; | |
2860 | char *hookname = it->elem; | |
2861 | ret = run_script(name, "lxc", hookname, hook, NULL); | |
2862 | if (ret) | |
2863 | return ret; | |
2864 | } | |
2865 | return 0; | |
2866 | } | |
72d0e1cb | 2867 | |
427b3a21 | 2868 | static void lxc_remove_nic(struct lxc_list *it) |
72d0e1cb SG |
2869 | { |
2870 | struct lxc_netdev *netdev = it->elem; | |
9ebb03ad | 2871 | struct lxc_list *it2,*next; |
72d0e1cb SG |
2872 | |
2873 | lxc_list_del(it); | |
2874 | ||
2875 | if (netdev->link) | |
2876 | free(netdev->link); | |
2877 | if (netdev->name) | |
2878 | free(netdev->name); | |
2879 | if (netdev->upscript) | |
2880 | free(netdev->upscript); | |
2881 | if (netdev->hwaddr) | |
2882 | free(netdev->hwaddr); | |
2883 | if (netdev->mtu) | |
2884 | free(netdev->mtu); | |
2885 | if (netdev->ipv4_gateway) | |
2886 | free(netdev->ipv4_gateway); | |
2887 | if (netdev->ipv6_gateway) | |
2888 | free(netdev->ipv6_gateway); | |
9ebb03ad | 2889 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { |
72d0e1cb SG |
2890 | lxc_list_del(it2); |
2891 | free(it2->elem); | |
2892 | free(it2); | |
2893 | } | |
9ebb03ad | 2894 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { |
72d0e1cb SG |
2895 | lxc_list_del(it2); |
2896 | free(it2->elem); | |
2897 | free(it2); | |
2898 | } | |
d95db067 | 2899 | free(netdev); |
72d0e1cb SG |
2900 | free(it); |
2901 | } | |
2902 | ||
2903 | /* we get passed in something like '0', '0.ipv4' or '1.ipv6' */ | |
12a50cc6 | 2904 | int lxc_clear_nic(struct lxc_conf *c, const char *key) |
72d0e1cb SG |
2905 | { |
2906 | char *p1; | |
2907 | int ret, idx, i; | |
2908 | struct lxc_list *it; | |
2909 | struct lxc_netdev *netdev; | |
2910 | ||
2911 | p1 = index(key, '.'); | |
2912 | if (!p1 || *(p1+1) == '\0') | |
2913 | p1 = NULL; | |
2914 | ||
2915 | ret = sscanf(key, "%d", &idx); | |
2916 | if (ret != 1) return -1; | |
2917 | if (idx < 0) | |
2918 | return -1; | |
2919 | ||
2920 | i = 0; | |
2921 | lxc_list_for_each(it, &c->network) { | |
2922 | if (i == idx) | |
2923 | break; | |
2924 | i++; | |
2925 | } | |
2926 | if (i < idx) // we don't have that many nics defined | |
2927 | return -1; | |
2928 | ||
2929 | if (!it || !it->elem) | |
2930 | return -1; | |
2931 | ||
2932 | netdev = it->elem; | |
2933 | ||
2934 | if (!p1) { | |
2935 | lxc_remove_nic(it); | |
2936 | } else if (strcmp(p1, "ipv4") == 0) { | |
9ebb03ad DE |
2937 | struct lxc_list *it2,*next; |
2938 | lxc_list_for_each_safe(it2, &netdev->ipv4, next) { | |
72d0e1cb SG |
2939 | lxc_list_del(it2); |
2940 | free(it2->elem); | |
2941 | free(it2); | |
2942 | } | |
2943 | } else if (strcmp(p1, "ipv6") == 0) { | |
9ebb03ad DE |
2944 | struct lxc_list *it2,*next; |
2945 | lxc_list_for_each_safe(it2, &netdev->ipv6, next) { | |
72d0e1cb SG |
2946 | lxc_list_del(it2); |
2947 | free(it2->elem); | |
2948 | free(it2); | |
2949 | } | |
2950 | } else if (strcmp(p1, "link") == 0) { | |
2951 | if (netdev->link) { | |
2952 | free(netdev->link); | |
2953 | netdev->link = NULL; | |
2954 | } | |
2955 | } else if (strcmp(p1, "name") == 0) { | |
2956 | if (netdev->name) { | |
2957 | free(netdev->name); | |
2958 | netdev->name = NULL; | |
2959 | } | |
2960 | } else if (strcmp(p1, "script.up") == 0) { | |
2961 | if (netdev->upscript) { | |
2962 | free(netdev->upscript); | |
2963 | netdev->upscript = NULL; | |
2964 | } | |
2965 | } else if (strcmp(p1, "hwaddr") == 0) { | |
2966 | if (netdev->hwaddr) { | |
2967 | free(netdev->hwaddr); | |
2968 | netdev->hwaddr = NULL; | |
2969 | } | |
2970 | } else if (strcmp(p1, "mtu") == 0) { | |
2971 | if (netdev->mtu) { | |
2972 | free(netdev->mtu); | |
2973 | netdev->mtu = NULL; | |
2974 | } | |
2975 | } else if (strcmp(p1, "ipv4_gateway") == 0) { | |
2976 | if (netdev->ipv4_gateway) { | |
2977 | free(netdev->ipv4_gateway); | |
2978 | netdev->ipv4_gateway = NULL; | |
2979 | } | |
2980 | } else if (strcmp(p1, "ipv6_gateway") == 0) { | |
2981 | if (netdev->ipv6_gateway) { | |
2982 | free(netdev->ipv6_gateway); | |
2983 | netdev->ipv6_gateway = NULL; | |
2984 | } | |
2985 | } | |
2986 | else return -1; | |
2987 | ||
2988 | return 0; | |
2989 | } | |
2990 | ||
2991 | int lxc_clear_config_network(struct lxc_conf *c) | |
2992 | { | |
9ebb03ad DE |
2993 | struct lxc_list *it,*next; |
2994 | lxc_list_for_each_safe(it, &c->network, next) { | |
72d0e1cb SG |
2995 | lxc_remove_nic(it); |
2996 | } | |
2997 | return 0; | |
2998 | } | |
2999 | ||
3000 | int lxc_clear_config_caps(struct lxc_conf *c) | |
3001 | { | |
9ebb03ad | 3002 | struct lxc_list *it,*next; |
72d0e1cb | 3003 | |
9ebb03ad | 3004 | lxc_list_for_each_safe(it, &c->caps, next) { |
72d0e1cb SG |
3005 | lxc_list_del(it); |
3006 | free(it->elem); | |
3007 | free(it); | |
3008 | } | |
3009 | return 0; | |
3010 | } | |
3011 | ||
12a50cc6 | 3012 | int lxc_clear_cgroups(struct lxc_conf *c, const char *key) |
72d0e1cb | 3013 | { |
9ebb03ad | 3014 | struct lxc_list *it,*next; |
72d0e1cb | 3015 | bool all = false; |
12a50cc6 | 3016 | const char *k = key + 11; |
72d0e1cb SG |
3017 | |
3018 | if (strcmp(key, "lxc.cgroup") == 0) | |
3019 | all = true; | |
3020 | ||
9ebb03ad | 3021 | lxc_list_for_each_safe(it, &c->cgroup, next) { |
72d0e1cb SG |
3022 | struct lxc_cgroup *cg = it->elem; |
3023 | if (!all && strcmp(cg->subsystem, k) != 0) | |
3024 | continue; | |
3025 | lxc_list_del(it); | |
3026 | free(cg->subsystem); | |
3027 | free(cg->value); | |
3028 | free(cg); | |
3029 | free(it); | |
3030 | } | |
3031 | return 0; | |
3032 | } | |
3033 | ||
3034 | int lxc_clear_mount_entries(struct lxc_conf *c) | |
3035 | { | |
9ebb03ad | 3036 | struct lxc_list *it,*next; |
72d0e1cb | 3037 | |
9ebb03ad | 3038 | lxc_list_for_each_safe(it, &c->mount_list, next) { |
72d0e1cb SG |
3039 | lxc_list_del(it); |
3040 | free(it->elem); | |
3041 | free(it); | |
3042 | } | |
3043 | return 0; | |
3044 | } | |
3045 | ||
12a50cc6 | 3046 | int lxc_clear_hooks(struct lxc_conf *c, const char *key) |
72d0e1cb | 3047 | { |
9ebb03ad | 3048 | struct lxc_list *it,*next; |
17ed13a3 | 3049 | bool all = false, done = false; |
12a50cc6 | 3050 | const char *k = key + 9; |
72d0e1cb SG |
3051 | int i; |
3052 | ||
17ed13a3 SH |
3053 | if (strcmp(key, "lxc.hook") == 0) |
3054 | all = true; | |
3055 | ||
72d0e1cb | 3056 | for (i=0; i<NUM_LXC_HOOKS; i++) { |
17ed13a3 | 3057 | if (all || strcmp(k, lxchook_names[i]) == 0) { |
9ebb03ad | 3058 | lxc_list_for_each_safe(it, &c->hooks[i], next) { |
17ed13a3 SH |
3059 | lxc_list_del(it); |
3060 | free(it->elem); | |
3061 | free(it); | |
3062 | } | |
3063 | done = true; | |
72d0e1cb SG |
3064 | } |
3065 | } | |
17ed13a3 SH |
3066 | |
3067 | if (!done) { | |
3068 | ERROR("Invalid hook key: %s", key); | |
3069 | return -1; | |
3070 | } | |
72d0e1cb SG |
3071 | return 0; |
3072 | } | |
8eb5694b | 3073 | |
7b35f3d6 SH |
3074 | void lxc_clear_saved_nics(struct lxc_conf *conf) |
3075 | { | |
3076 | int i; | |
3077 | ||
3078 | if (!conf->num_savednics) | |
3079 | return; | |
3080 | for (i=0; i < conf->num_savednics; i++) | |
3081 | free(conf->saved_nics[i].orig_name); | |
3082 | conf->saved_nics = 0; | |
3083 | free(conf->saved_nics); | |
3084 | } | |
3085 | ||
8eb5694b SH |
3086 | void lxc_conf_free(struct lxc_conf *conf) |
3087 | { | |
3088 | if (!conf) | |
3089 | return; | |
3090 | if (conf->console.path) | |
3091 | free(conf->console.path); | |
ae9242c8 | 3092 | if (conf->rootfs.mount != default_rootfs_mount) |
8eb5694b | 3093 | free(conf->rootfs.mount); |
d95db067 DE |
3094 | if (conf->rootfs.path) |
3095 | free(conf->rootfs.path); | |
3096 | if (conf->utsname) | |
3097 | free(conf->utsname); | |
3098 | if (conf->ttydir) | |
3099 | free(conf->ttydir); | |
3100 | if (conf->fstab) | |
3101 | free(conf->fstab); | |
8eb5694b | 3102 | lxc_clear_config_network(conf); |
1f530df6 | 3103 | #if HAVE_APPARMOR |
8eb5694b SH |
3104 | if (conf->aa_profile) |
3105 | free(conf->aa_profile); | |
1f530df6 | 3106 | #endif |
769872f9 | 3107 | lxc_seccomp_free(conf); |
8eb5694b SH |
3108 | lxc_clear_config_caps(conf); |
3109 | lxc_clear_cgroups(conf, "lxc.cgroup"); | |
17ed13a3 | 3110 | lxc_clear_hooks(conf, "lxc.hook"); |
8eb5694b | 3111 | lxc_clear_mount_entries(conf); |
7b35f3d6 | 3112 | lxc_clear_saved_nics(conf); |
8eb5694b SH |
3113 | free(conf); |
3114 | } |