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88213476 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
88213476 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
88213476 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
88213476 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <signal.h> | |
23 | #include <sched.h> | |
24 | #include <unistd.h> | |
25 | #include <sys/types.h> | |
88213476 | 26 | #include <sys/mount.h> |
88213476 LP |
27 | #include <stdlib.h> |
28 | #include <string.h> | |
29 | #include <stdio.h> | |
30 | #include <errno.h> | |
31 | #include <sys/prctl.h> | |
88213476 | 32 | #include <getopt.h> |
687d0825 | 33 | #include <grp.h> |
5ed27dbd | 34 | #include <linux/fs.h> |
9537eab0 | 35 | #include <sys/socket.h> |
aea38d80 | 36 | #include <linux/netlink.h> |
aa28aefe | 37 | #include <net/if.h> |
69c79d3c | 38 | #include <linux/veth.h> |
6afc95b7 | 39 | #include <sys/personality.h> |
1b9e5b12 | 40 | #include <linux/loop.h> |
2fbe4296 | 41 | #include <sys/file.h> |
aa28aefe | 42 | |
5d63309c | 43 | #ifdef HAVE_SELINUX |
a8828ed9 DW |
44 | #include <selinux/selinux.h> |
45 | #endif | |
88213476 | 46 | |
24fb1112 LP |
47 | #ifdef HAVE_SECCOMP |
48 | #include <seccomp.h> | |
49 | #endif | |
50 | ||
1b9e5b12 LP |
51 | #ifdef HAVE_BLKID |
52 | #include <blkid/blkid.h> | |
53 | #endif | |
54 | ||
1f0cd86b LP |
55 | #include "sd-daemon.h" |
56 | #include "sd-bus.h" | |
57 | #include "sd-id128.h" | |
1c4baffc | 58 | #include "sd-netlink.h" |
958b66ea | 59 | #include "random-util.h" |
88213476 LP |
60 | #include "log.h" |
61 | #include "util.h" | |
49e942b2 | 62 | #include "mkdir.h" |
c6878637 | 63 | #include "rm-rf.h" |
6b2d0e85 | 64 | #include "macro.h" |
94d82985 | 65 | #include "missing.h" |
04d391da | 66 | #include "cgroup-util.h" |
a258bf26 | 67 | #include "strv.h" |
9eb977db | 68 | #include "path-util.h" |
a41fe3a2 | 69 | #include "loopback-setup.h" |
4fc9982c | 70 | #include "dev-setup.h" |
842f3b0f | 71 | #include "fdset.h" |
acbeb427 | 72 | #include "build.h" |
a5c32cff | 73 | #include "fileio.h" |
40ca29a1 | 74 | #include "bus-util.h" |
1f0cd86b | 75 | #include "bus-error.h" |
4ba93280 | 76 | #include "ptyfwd.h" |
f4889f65 | 77 | #include "env-util.h" |
1c4baffc | 78 | #include "netlink-util.h" |
7e227024 | 79 | #include "udev-util.h" |
1b9e5b12 LP |
80 | #include "blkid-util.h" |
81 | #include "gpt.h" | |
01dde061 | 82 | #include "siphash24.h" |
849958d1 | 83 | #include "copy.h" |
3577de7a | 84 | #include "base-filesystem.h" |
a2da110b | 85 | #include "barrier.h" |
023fb90b | 86 | #include "event-util.h" |
f01ae826 | 87 | #include "capability.h" |
2822da4f | 88 | #include "cap-list.h" |
ec16945e | 89 | #include "btrfs-util.h" |
1b9cebf6 | 90 | #include "machine-image.h" |
6d0b55c2 LP |
91 | #include "list.h" |
92 | #include "in-addr-util.h" | |
12c2884c | 93 | #include "firewall-util.h" |
6d0b55c2 | 94 | #include "local-addresses.h" |
6482f626 | 95 | #include "formats-util.h" |
0b452006 | 96 | #include "process-util.h" |
288a74cc | 97 | #include "terminal-util.h" |
958b66ea | 98 | #include "hostname-util.h" |
24882e06 | 99 | #include "signal-util.h" |
f2d88580 | 100 | |
e9642be2 LP |
101 | #ifdef HAVE_SECCOMP |
102 | #include "seccomp-util.h" | |
103 | #endif | |
104 | ||
6d0b55c2 LP |
105 | typedef struct ExposePort { |
106 | int protocol; | |
107 | uint16_t host_port; | |
108 | uint16_t container_port; | |
109 | LIST_FIELDS(struct ExposePort, ports); | |
110 | } ExposePort; | |
111 | ||
113cea80 DH |
112 | typedef enum ContainerStatus { |
113 | CONTAINER_TERMINATED, | |
114 | CONTAINER_REBOOTED | |
115 | } ContainerStatus; | |
116 | ||
57fb9fb5 LP |
117 | typedef enum LinkJournal { |
118 | LINK_NO, | |
119 | LINK_AUTO, | |
120 | LINK_HOST, | |
121 | LINK_GUEST | |
122 | } LinkJournal; | |
88213476 | 123 | |
4d9f07b4 LP |
124 | typedef enum Volatile { |
125 | VOLATILE_NO, | |
126 | VOLATILE_YES, | |
127 | VOLATILE_STATE, | |
128 | } Volatile; | |
129 | ||
5a8af538 LP |
130 | typedef enum CustomMountType { |
131 | CUSTOM_MOUNT_BIND, | |
132 | CUSTOM_MOUNT_TMPFS, | |
133 | CUSTOM_MOUNT_OVERLAY, | |
134 | } CustomMountType; | |
135 | ||
136 | typedef struct CustomMount { | |
137 | CustomMountType type; | |
138 | bool read_only; | |
139 | char *source; /* for overlayfs this is the upper directory */ | |
140 | char *destination; | |
141 | char *options; | |
142 | char *work_dir; | |
143 | char **lower; | |
144 | } CustomMount; | |
145 | ||
88213476 | 146 | static char *arg_directory = NULL; |
ec16945e | 147 | static char *arg_template = NULL; |
687d0825 | 148 | static char *arg_user = NULL; |
9444b1f2 | 149 | static sd_id128_t arg_uuid = {}; |
7027ff61 | 150 | static char *arg_machine = NULL; |
c74e630d LP |
151 | static const char *arg_selinux_context = NULL; |
152 | static const char *arg_selinux_apifs_context = NULL; | |
9444b1f2 | 153 | static const char *arg_slice = NULL; |
ff01d048 | 154 | static bool arg_private_network = false; |
bc2f673e | 155 | static bool arg_read_only = false; |
0f0dbc46 | 156 | static bool arg_boot = false; |
ec16945e | 157 | static bool arg_ephemeral = false; |
57fb9fb5 | 158 | static LinkJournal arg_link_journal = LINK_AUTO; |
574edc90 | 159 | static bool arg_link_journal_try = false; |
5076f0cc LP |
160 | static uint64_t arg_retain = |
161 | (1ULL << CAP_CHOWN) | | |
162 | (1ULL << CAP_DAC_OVERRIDE) | | |
163 | (1ULL << CAP_DAC_READ_SEARCH) | | |
164 | (1ULL << CAP_FOWNER) | | |
165 | (1ULL << CAP_FSETID) | | |
166 | (1ULL << CAP_IPC_OWNER) | | |
167 | (1ULL << CAP_KILL) | | |
168 | (1ULL << CAP_LEASE) | | |
169 | (1ULL << CAP_LINUX_IMMUTABLE) | | |
170 | (1ULL << CAP_NET_BIND_SERVICE) | | |
171 | (1ULL << CAP_NET_BROADCAST) | | |
172 | (1ULL << CAP_NET_RAW) | | |
173 | (1ULL << CAP_SETGID) | | |
174 | (1ULL << CAP_SETFCAP) | | |
175 | (1ULL << CAP_SETPCAP) | | |
176 | (1ULL << CAP_SETUID) | | |
177 | (1ULL << CAP_SYS_ADMIN) | | |
178 | (1ULL << CAP_SYS_CHROOT) | | |
179 | (1ULL << CAP_SYS_NICE) | | |
180 | (1ULL << CAP_SYS_PTRACE) | | |
181 | (1ULL << CAP_SYS_TTY_CONFIG) | | |
d87be9b0 | 182 | (1ULL << CAP_SYS_RESOURCE) | |
88d04e31 LP |
183 | (1ULL << CAP_SYS_BOOT) | |
184 | (1ULL << CAP_AUDIT_WRITE) | | |
7f112f50 LP |
185 | (1ULL << CAP_AUDIT_CONTROL) | |
186 | (1ULL << CAP_MKNOD); | |
5a8af538 LP |
187 | static CustomMount *arg_custom_mounts = NULL; |
188 | static unsigned arg_n_custom_mounts = 0; | |
f4889f65 | 189 | static char **arg_setenv = NULL; |
284c0b91 | 190 | static bool arg_quiet = false; |
8a96d94e | 191 | static bool arg_share_system = false; |
eb91eb18 | 192 | static bool arg_register = true; |
89f7c846 | 193 | static bool arg_keep_unit = false; |
aa28aefe | 194 | static char **arg_network_interfaces = NULL; |
c74e630d | 195 | static char **arg_network_macvlan = NULL; |
4bbfe7ad | 196 | static char **arg_network_ipvlan = NULL; |
69c79d3c | 197 | static bool arg_network_veth = false; |
c74e630d | 198 | static const char *arg_network_bridge = NULL; |
050f7277 | 199 | static unsigned long arg_personality = PERSONALITY_INVALID; |
ec16945e | 200 | static char *arg_image = NULL; |
4d9f07b4 | 201 | static Volatile arg_volatile = VOLATILE_NO; |
6d0b55c2 | 202 | static ExposePort *arg_expose_ports = NULL; |
f36933fe | 203 | static char **arg_property = NULL; |
6dac160c LP |
204 | static uid_t arg_uid_shift = UID_INVALID, arg_uid_range = 0x10000U; |
205 | static bool arg_userns = false; | |
c6c8f6e2 | 206 | static int arg_kill_signal = 0; |
88213476 | 207 | |
601185b4 | 208 | static void help(void) { |
88213476 LP |
209 | printf("%s [OPTIONS...] [PATH] [ARGUMENTS...]\n\n" |
210 | "Spawn a minimal namespace container for debugging, testing and building.\n\n" | |
a8828ed9 DW |
211 | " -h --help Show this help\n" |
212 | " --version Print version string\n" | |
69c79d3c | 213 | " -q --quiet Do not show status information\n" |
1b9e5b12 | 214 | " -D --directory=PATH Root directory for the container\n" |
ec16945e LP |
215 | " --template=PATH Initialize root directory from template directory,\n" |
216 | " if missing\n" | |
217 | " -x --ephemeral Run container with snapshot of root directory, and\n" | |
218 | " remove it after exit\n" | |
219 | " -i --image=PATH File system device or disk image for the container\n" | |
a8828ed9 DW |
220 | " -b --boot Boot up full system (i.e. invoke init)\n" |
221 | " -u --user=USER Run the command under specified user or uid\n" | |
a8828ed9 | 222 | " -M --machine=NAME Set the machine name for the container\n" |
69c79d3c | 223 | " --uuid=UUID Set a specific machine UUID for the container\n" |
a8828ed9 | 224 | " -S --slice=SLICE Place the container in the specified slice\n" |
f36933fe | 225 | " --property=NAME=VALUE Set scope unit property\n" |
03cfe0d5 LP |
226 | " --private-users[=UIDBASE[:NUIDS]]\n" |
227 | " Run within user namespace\n" | |
69c79d3c LP |
228 | " --private-network Disable network in container\n" |
229 | " --network-interface=INTERFACE\n" | |
230 | " Assign an existing network interface to the\n" | |
231 | " container\n" | |
c74e630d LP |
232 | " --network-macvlan=INTERFACE\n" |
233 | " Create a macvlan network interface based on an\n" | |
234 | " existing network interface to the container\n" | |
4bbfe7ad TG |
235 | " --network-ipvlan=INTERFACE\n" |
236 | " Create a ipvlan network interface based on an\n" | |
237 | " existing network interface to the container\n" | |
0dfaa006 | 238 | " -n --network-veth Add a virtual ethernet connection between host\n" |
69c79d3c | 239 | " and container\n" |
ab046dde | 240 | " --network-bridge=INTERFACE\n" |
32457153 | 241 | " Add a virtual ethernet connection between host\n" |
ab046dde TG |
242 | " and container and add it to an existing bridge on\n" |
243 | " the host\n" | |
6d0b55c2 | 244 | " -p --port=[PROTOCOL:]HOSTPORT[:CONTAINERPORT]\n" |
ab5e3a1b | 245 | " Expose a container IP port on the host\n" |
82adf6af LP |
246 | " -Z --selinux-context=SECLABEL\n" |
247 | " Set the SELinux security context to be used by\n" | |
248 | " processes in the container\n" | |
249 | " -L --selinux-apifs-context=SECLABEL\n" | |
250 | " Set the SELinux security context to be used by\n" | |
251 | " API/tmpfs file systems in the container\n" | |
a8828ed9 DW |
252 | " --capability=CAP In addition to the default, retain specified\n" |
253 | " capability\n" | |
254 | " --drop-capability=CAP Drop the specified capability from the default set\n" | |
c6c8f6e2 | 255 | " --kill-signal=SIGNAL Select signal to use for shutting down PID 1\n" |
574edc90 MP |
256 | " --link-journal=MODE Link up guest journal, one of no, auto, guest, host,\n" |
257 | " try-guest, try-host\n" | |
258 | " -j Equivalent to --link-journal=try-guest\n" | |
69c79d3c | 259 | " --read-only Mount the root directory read-only\n" |
a8828ed9 DW |
260 | " --bind=PATH[:PATH] Bind mount a file or directory from the host into\n" |
261 | " the container\n" | |
262 | " --bind-ro=PATH[:PATH] Similar, but creates a read-only bind mount\n" | |
06c17c39 | 263 | " --tmpfs=PATH:[OPTIONS] Mount an empty tmpfs to the specified directory\n" |
5a8af538 LP |
264 | " --overlay=PATH[:PATH...]:PATH\n" |
265 | " Create an overlay mount from the host to \n" | |
266 | " the container\n" | |
267 | " --overlay-ro=PATH[:PATH...]:PATH\n" | |
268 | " Similar, but creates a read-only overlay mount\n" | |
284c0b91 | 269 | " --setenv=NAME=VALUE Pass an environment variable to PID 1\n" |
69c79d3c | 270 | " --share-system Share system namespaces with host\n" |
eb91eb18 | 271 | " --register=BOOLEAN Register container as machine\n" |
89f7c846 | 272 | " --keep-unit Do not register a scope for the machine, reuse\n" |
4d9f07b4 | 273 | " the service unit nspawn is running in\n" |
6d0b55c2 LP |
274 | " --volatile[=MODE] Run the system in volatile mode\n" |
275 | , program_invocation_short_name); | |
88213476 LP |
276 | } |
277 | ||
5a8af538 LP |
278 | static CustomMount* custom_mount_add(CustomMountType t) { |
279 | CustomMount *c, *ret; | |
280 | ||
281 | c = realloc(arg_custom_mounts, (arg_n_custom_mounts + 1) * sizeof(CustomMount)); | |
282 | if (!c) | |
283 | return NULL; | |
284 | ||
285 | arg_custom_mounts = c; | |
286 | ret = arg_custom_mounts + arg_n_custom_mounts; | |
287 | arg_n_custom_mounts++; | |
288 | ||
289 | *ret = (CustomMount) { .type = t }; | |
290 | ||
291 | return ret; | |
292 | } | |
293 | ||
294 | static void custom_mount_free_all(void) { | |
295 | unsigned i; | |
296 | ||
297 | for (i = 0; i < arg_n_custom_mounts; i++) { | |
298 | CustomMount *m = &arg_custom_mounts[i]; | |
299 | ||
300 | free(m->source); | |
301 | free(m->destination); | |
302 | free(m->options); | |
303 | ||
304 | if (m->work_dir) { | |
305 | (void) rm_rf(m->work_dir, REMOVE_ROOT|REMOVE_PHYSICAL); | |
306 | free(m->work_dir); | |
307 | } | |
308 | ||
309 | strv_free(m->lower); | |
310 | } | |
311 | ||
312 | free(arg_custom_mounts); | |
313 | arg_custom_mounts = NULL; | |
314 | arg_n_custom_mounts = 0; | |
315 | } | |
316 | ||
317 | static int custom_mount_compare(const void *a, const void *b) { | |
318 | const CustomMount *x = a, *y = b; | |
319 | int r; | |
320 | ||
321 | r = path_compare(x->destination, y->destination); | |
322 | if (r != 0) | |
323 | return r; | |
324 | ||
325 | if (x->type < y->type) | |
326 | return -1; | |
327 | if (x->type > y->type) | |
328 | return 1; | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | static int custom_mounts_prepare(void) { | |
334 | unsigned i; | |
335 | int r; | |
336 | ||
337 | /* Ensure the mounts are applied prefix first. */ | |
338 | qsort_safe(arg_custom_mounts, arg_n_custom_mounts, sizeof(CustomMount), custom_mount_compare); | |
339 | ||
340 | /* Allocate working directories for the overlay file systems that need it */ | |
341 | for (i = 0; i < arg_n_custom_mounts; i++) { | |
342 | CustomMount *m = &arg_custom_mounts[i]; | |
343 | ||
344 | if (m->type != CUSTOM_MOUNT_OVERLAY) | |
345 | continue; | |
346 | ||
347 | if (m->work_dir) | |
348 | continue; | |
349 | ||
350 | if (m->read_only) | |
351 | continue; | |
352 | ||
14bcf25c | 353 | r = tempfn_random(m->source, NULL, &m->work_dir); |
5a8af538 LP |
354 | if (r < 0) |
355 | return log_error_errno(r, "Failed to generate work directory from %s: %m", m->source); | |
356 | } | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
ec16945e LP |
361 | static int set_sanitized_path(char **b, const char *path) { |
362 | char *p; | |
363 | ||
364 | assert(b); | |
365 | assert(path); | |
366 | ||
367 | p = canonicalize_file_name(path); | |
368 | if (!p) { | |
369 | if (errno != ENOENT) | |
370 | return -errno; | |
371 | ||
372 | p = path_make_absolute_cwd(path); | |
373 | if (!p) | |
374 | return -ENOMEM; | |
375 | } | |
376 | ||
377 | free(*b); | |
378 | *b = path_kill_slashes(p); | |
379 | return 0; | |
380 | } | |
381 | ||
88213476 LP |
382 | static int parse_argv(int argc, char *argv[]) { |
383 | ||
a41fe3a2 | 384 | enum { |
acbeb427 ZJS |
385 | ARG_VERSION = 0x100, |
386 | ARG_PRIVATE_NETWORK, | |
bc2f673e | 387 | ARG_UUID, |
5076f0cc | 388 | ARG_READ_ONLY, |
57fb9fb5 | 389 | ARG_CAPABILITY, |
420c7379 | 390 | ARG_DROP_CAPABILITY, |
17fe0523 LP |
391 | ARG_LINK_JOURNAL, |
392 | ARG_BIND, | |
f4889f65 | 393 | ARG_BIND_RO, |
06c17c39 | 394 | ARG_TMPFS, |
5a8af538 LP |
395 | ARG_OVERLAY, |
396 | ARG_OVERLAY_RO, | |
f4889f65 | 397 | ARG_SETENV, |
eb91eb18 | 398 | ARG_SHARE_SYSTEM, |
89f7c846 | 399 | ARG_REGISTER, |
aa28aefe | 400 | ARG_KEEP_UNIT, |
69c79d3c | 401 | ARG_NETWORK_INTERFACE, |
c74e630d | 402 | ARG_NETWORK_MACVLAN, |
4bbfe7ad | 403 | ARG_NETWORK_IPVLAN, |
ab046dde | 404 | ARG_NETWORK_BRIDGE, |
6afc95b7 | 405 | ARG_PERSONALITY, |
4d9f07b4 | 406 | ARG_VOLATILE, |
ec16945e | 407 | ARG_TEMPLATE, |
f36933fe | 408 | ARG_PROPERTY, |
6dac160c | 409 | ARG_PRIVATE_USERS, |
c6c8f6e2 | 410 | ARG_KILL_SIGNAL, |
a41fe3a2 LP |
411 | }; |
412 | ||
88213476 | 413 | static const struct option options[] = { |
aa28aefe LP |
414 | { "help", no_argument, NULL, 'h' }, |
415 | { "version", no_argument, NULL, ARG_VERSION }, | |
416 | { "directory", required_argument, NULL, 'D' }, | |
ec16945e LP |
417 | { "template", required_argument, NULL, ARG_TEMPLATE }, |
418 | { "ephemeral", no_argument, NULL, 'x' }, | |
aa28aefe LP |
419 | { "user", required_argument, NULL, 'u' }, |
420 | { "private-network", no_argument, NULL, ARG_PRIVATE_NETWORK }, | |
421 | { "boot", no_argument, NULL, 'b' }, | |
422 | { "uuid", required_argument, NULL, ARG_UUID }, | |
423 | { "read-only", no_argument, NULL, ARG_READ_ONLY }, | |
424 | { "capability", required_argument, NULL, ARG_CAPABILITY }, | |
425 | { "drop-capability", required_argument, NULL, ARG_DROP_CAPABILITY }, | |
426 | { "link-journal", required_argument, NULL, ARG_LINK_JOURNAL }, | |
427 | { "bind", required_argument, NULL, ARG_BIND }, | |
428 | { "bind-ro", required_argument, NULL, ARG_BIND_RO }, | |
06c17c39 | 429 | { "tmpfs", required_argument, NULL, ARG_TMPFS }, |
5a8af538 LP |
430 | { "overlay", required_argument, NULL, ARG_OVERLAY }, |
431 | { "overlay-ro", required_argument, NULL, ARG_OVERLAY_RO }, | |
aa28aefe LP |
432 | { "machine", required_argument, NULL, 'M' }, |
433 | { "slice", required_argument, NULL, 'S' }, | |
434 | { "setenv", required_argument, NULL, ARG_SETENV }, | |
435 | { "selinux-context", required_argument, NULL, 'Z' }, | |
436 | { "selinux-apifs-context", required_argument, NULL, 'L' }, | |
437 | { "quiet", no_argument, NULL, 'q' }, | |
438 | { "share-system", no_argument, NULL, ARG_SHARE_SYSTEM }, | |
439 | { "register", required_argument, NULL, ARG_REGISTER }, | |
440 | { "keep-unit", no_argument, NULL, ARG_KEEP_UNIT }, | |
441 | { "network-interface", required_argument, NULL, ARG_NETWORK_INTERFACE }, | |
c74e630d | 442 | { "network-macvlan", required_argument, NULL, ARG_NETWORK_MACVLAN }, |
4bbfe7ad | 443 | { "network-ipvlan", required_argument, NULL, ARG_NETWORK_IPVLAN }, |
0dfaa006 | 444 | { "network-veth", no_argument, NULL, 'n' }, |
ab046dde | 445 | { "network-bridge", required_argument, NULL, ARG_NETWORK_BRIDGE }, |
6afc95b7 | 446 | { "personality", required_argument, NULL, ARG_PERSONALITY }, |
1b9e5b12 | 447 | { "image", required_argument, NULL, 'i' }, |
4d9f07b4 | 448 | { "volatile", optional_argument, NULL, ARG_VOLATILE }, |
6d0b55c2 | 449 | { "port", required_argument, NULL, 'p' }, |
f36933fe | 450 | { "property", required_argument, NULL, ARG_PROPERTY }, |
6dac160c | 451 | { "private-users", optional_argument, NULL, ARG_PRIVATE_USERS }, |
c6c8f6e2 | 452 | { "kill-signal", required_argument, NULL, ARG_KILL_SIGNAL }, |
eb9da376 | 453 | {} |
88213476 LP |
454 | }; |
455 | ||
9444b1f2 | 456 | int c, r; |
a42c8b54 | 457 | uint64_t plus = 0, minus = 0; |
88213476 LP |
458 | |
459 | assert(argc >= 0); | |
460 | assert(argv); | |
461 | ||
0dfaa006 | 462 | while ((c = getopt_long(argc, argv, "+hD:u:bL:M:jS:Z:qi:xp:n", options, NULL)) >= 0) |
88213476 LP |
463 | |
464 | switch (c) { | |
465 | ||
466 | case 'h': | |
601185b4 ZJS |
467 | help(); |
468 | return 0; | |
88213476 | 469 | |
acbeb427 ZJS |
470 | case ARG_VERSION: |
471 | puts(PACKAGE_STRING); | |
472 | puts(SYSTEMD_FEATURES); | |
473 | return 0; | |
474 | ||
88213476 | 475 | case 'D': |
ec16945e LP |
476 | r = set_sanitized_path(&arg_directory, optarg); |
477 | if (r < 0) | |
478 | return log_error_errno(r, "Invalid root directory: %m"); | |
479 | ||
480 | break; | |
481 | ||
482 | case ARG_TEMPLATE: | |
483 | r = set_sanitized_path(&arg_template, optarg); | |
484 | if (r < 0) | |
485 | return log_error_errno(r, "Invalid template directory: %m"); | |
88213476 LP |
486 | |
487 | break; | |
488 | ||
1b9e5b12 | 489 | case 'i': |
ec16945e LP |
490 | r = set_sanitized_path(&arg_image, optarg); |
491 | if (r < 0) | |
492 | return log_error_errno(r, "Invalid image path: %m"); | |
493 | ||
494 | break; | |
495 | ||
496 | case 'x': | |
497 | arg_ephemeral = true; | |
1b9e5b12 LP |
498 | break; |
499 | ||
687d0825 MV |
500 | case 'u': |
501 | free(arg_user); | |
7027ff61 LP |
502 | arg_user = strdup(optarg); |
503 | if (!arg_user) | |
504 | return log_oom(); | |
687d0825 MV |
505 | |
506 | break; | |
507 | ||
ab046dde | 508 | case ARG_NETWORK_BRIDGE: |
c74e630d | 509 | arg_network_bridge = optarg; |
ab046dde TG |
510 | |
511 | /* fall through */ | |
512 | ||
0dfaa006 | 513 | case 'n': |
69c79d3c LP |
514 | arg_network_veth = true; |
515 | arg_private_network = true; | |
516 | break; | |
517 | ||
aa28aefe | 518 | case ARG_NETWORK_INTERFACE: |
c74e630d LP |
519 | if (strv_extend(&arg_network_interfaces, optarg) < 0) |
520 | return log_oom(); | |
521 | ||
522 | arg_private_network = true; | |
523 | break; | |
524 | ||
525 | case ARG_NETWORK_MACVLAN: | |
526 | if (strv_extend(&arg_network_macvlan, optarg) < 0) | |
aa28aefe LP |
527 | return log_oom(); |
528 | ||
4bbfe7ad TG |
529 | arg_private_network = true; |
530 | break; | |
531 | ||
532 | case ARG_NETWORK_IPVLAN: | |
533 | if (strv_extend(&arg_network_ipvlan, optarg) < 0) | |
534 | return log_oom(); | |
535 | ||
aa28aefe LP |
536 | /* fall through */ |
537 | ||
ff01d048 LP |
538 | case ARG_PRIVATE_NETWORK: |
539 | arg_private_network = true; | |
a41fe3a2 LP |
540 | break; |
541 | ||
0f0dbc46 LP |
542 | case 'b': |
543 | arg_boot = true; | |
544 | break; | |
545 | ||
144f0fc0 | 546 | case ARG_UUID: |
9444b1f2 LP |
547 | r = sd_id128_from_string(optarg, &arg_uuid); |
548 | if (r < 0) { | |
aa96c6cb | 549 | log_error("Invalid UUID: %s", optarg); |
9444b1f2 | 550 | return r; |
aa96c6cb | 551 | } |
9444b1f2 | 552 | break; |
aa96c6cb | 553 | |
9444b1f2 | 554 | case 'S': |
c74e630d | 555 | arg_slice = optarg; |
144f0fc0 LP |
556 | break; |
557 | ||
7027ff61 | 558 | case 'M': |
eb91eb18 LP |
559 | if (isempty(optarg)) { |
560 | free(arg_machine); | |
561 | arg_machine = NULL; | |
562 | } else { | |
0c3c4284 | 563 | if (!machine_name_is_valid(optarg)) { |
eb91eb18 LP |
564 | log_error("Invalid machine name: %s", optarg); |
565 | return -EINVAL; | |
566 | } | |
7027ff61 | 567 | |
0c3c4284 LP |
568 | r = free_and_strdup(&arg_machine, optarg); |
569 | if (r < 0) | |
eb91eb18 LP |
570 | return log_oom(); |
571 | ||
572 | break; | |
573 | } | |
7027ff61 | 574 | |
82adf6af LP |
575 | case 'Z': |
576 | arg_selinux_context = optarg; | |
a8828ed9 DW |
577 | break; |
578 | ||
82adf6af LP |
579 | case 'L': |
580 | arg_selinux_apifs_context = optarg; | |
a8828ed9 DW |
581 | break; |
582 | ||
bc2f673e LP |
583 | case ARG_READ_ONLY: |
584 | arg_read_only = true; | |
585 | break; | |
586 | ||
420c7379 LP |
587 | case ARG_CAPABILITY: |
588 | case ARG_DROP_CAPABILITY: { | |
a2a5291b | 589 | const char *state, *word; |
5076f0cc LP |
590 | size_t length; |
591 | ||
592 | FOREACH_WORD_SEPARATOR(word, length, optarg, ",", state) { | |
39ed67d1 | 593 | _cleanup_free_ char *t; |
5076f0cc LP |
594 | |
595 | t = strndup(word, length); | |
0d0f0c50 SL |
596 | if (!t) |
597 | return log_oom(); | |
5076f0cc | 598 | |
39ed67d1 LP |
599 | if (streq(t, "all")) { |
600 | if (c == ARG_CAPABILITY) | |
a42c8b54 | 601 | plus = (uint64_t) -1; |
39ed67d1 | 602 | else |
a42c8b54 | 603 | minus = (uint64_t) -1; |
39ed67d1 | 604 | } else { |
2822da4f LP |
605 | int cap; |
606 | ||
607 | cap = capability_from_name(t); | |
608 | if (cap < 0) { | |
39ed67d1 LP |
609 | log_error("Failed to parse capability %s.", t); |
610 | return -EINVAL; | |
611 | } | |
612 | ||
613 | if (c == ARG_CAPABILITY) | |
a42c8b54 | 614 | plus |= 1ULL << (uint64_t) cap; |
39ed67d1 | 615 | else |
a42c8b54 | 616 | minus |= 1ULL << (uint64_t) cap; |
5076f0cc | 617 | } |
5076f0cc LP |
618 | } |
619 | ||
620 | break; | |
621 | } | |
622 | ||
57fb9fb5 LP |
623 | case 'j': |
624 | arg_link_journal = LINK_GUEST; | |
574edc90 | 625 | arg_link_journal_try = true; |
57fb9fb5 LP |
626 | break; |
627 | ||
628 | case ARG_LINK_JOURNAL: | |
53e438e3 | 629 | if (streq(optarg, "auto")) { |
57fb9fb5 | 630 | arg_link_journal = LINK_AUTO; |
53e438e3 LP |
631 | arg_link_journal_try = false; |
632 | } else if (streq(optarg, "no")) { | |
57fb9fb5 | 633 | arg_link_journal = LINK_NO; |
53e438e3 LP |
634 | arg_link_journal_try = false; |
635 | } else if (streq(optarg, "guest")) { | |
57fb9fb5 | 636 | arg_link_journal = LINK_GUEST; |
53e438e3 LP |
637 | arg_link_journal_try = false; |
638 | } else if (streq(optarg, "host")) { | |
57fb9fb5 | 639 | arg_link_journal = LINK_HOST; |
53e438e3 LP |
640 | arg_link_journal_try = false; |
641 | } else if (streq(optarg, "try-guest")) { | |
574edc90 MP |
642 | arg_link_journal = LINK_GUEST; |
643 | arg_link_journal_try = true; | |
644 | } else if (streq(optarg, "try-host")) { | |
645 | arg_link_journal = LINK_HOST; | |
646 | arg_link_journal_try = true; | |
647 | } else { | |
57fb9fb5 LP |
648 | log_error("Failed to parse link journal mode %s", optarg); |
649 | return -EINVAL; | |
650 | } | |
651 | ||
652 | break; | |
653 | ||
17fe0523 LP |
654 | case ARG_BIND: |
655 | case ARG_BIND_RO: { | |
5a8af538 LP |
656 | _cleanup_free_ char *source = NULL, *destination = NULL; |
657 | CustomMount *m; | |
17fe0523 | 658 | char *e; |
17fe0523 LP |
659 | |
660 | e = strchr(optarg, ':'); | |
661 | if (e) { | |
5a8af538 LP |
662 | source = strndup(optarg, e - optarg); |
663 | destination = strdup(e + 1); | |
17fe0523 | 664 | } else { |
5a8af538 LP |
665 | source = strdup(optarg); |
666 | destination = strdup(optarg); | |
17fe0523 LP |
667 | } |
668 | ||
5a8af538 | 669 | if (!source || !destination) |
17fe0523 LP |
670 | return log_oom(); |
671 | ||
5a8af538 | 672 | if (!path_is_absolute(source) || !path_is_absolute(destination)) { |
17fe0523 LP |
673 | log_error("Invalid bind mount specification: %s", optarg); |
674 | return -EINVAL; | |
675 | } | |
676 | ||
5a8af538 LP |
677 | m = custom_mount_add(CUSTOM_MOUNT_BIND); |
678 | if (!m) | |
b3451bed | 679 | return log_oom(); |
17fe0523 | 680 | |
5a8af538 LP |
681 | m->source = source; |
682 | m->destination = destination; | |
683 | m->read_only = c == ARG_BIND_RO; | |
684 | ||
685 | source = destination = NULL; | |
17fe0523 LP |
686 | |
687 | break; | |
688 | } | |
689 | ||
06c17c39 | 690 | case ARG_TMPFS: { |
5a8af538 LP |
691 | _cleanup_free_ char *path = NULL, *opts = NULL; |
692 | CustomMount *m; | |
06c17c39 LP |
693 | char *e; |
694 | ||
695 | e = strchr(optarg, ':'); | |
696 | if (e) { | |
5a8af538 LP |
697 | path = strndup(optarg, e - optarg); |
698 | opts = strdup(e + 1); | |
06c17c39 | 699 | } else { |
5a8af538 LP |
700 | path = strdup(optarg); |
701 | opts = strdup("mode=0755"); | |
06c17c39 LP |
702 | } |
703 | ||
5a8af538 | 704 | if (!path || !opts) |
06c17c39 LP |
705 | return log_oom(); |
706 | ||
5a8af538 | 707 | if (!path_is_absolute(path)) { |
06c17c39 LP |
708 | log_error("Invalid tmpfs specification: %s", optarg); |
709 | return -EINVAL; | |
710 | } | |
711 | ||
5a8af538 LP |
712 | m = custom_mount_add(CUSTOM_MOUNT_TMPFS); |
713 | if (!m) | |
06c17c39 LP |
714 | return log_oom(); |
715 | ||
5a8af538 LP |
716 | m->destination = path; |
717 | m->options = opts; | |
06c17c39 | 718 | |
5a8af538 LP |
719 | path = opts = NULL; |
720 | ||
721 | break; | |
722 | } | |
723 | ||
724 | case ARG_OVERLAY: | |
725 | case ARG_OVERLAY_RO: { | |
726 | _cleanup_free_ char *upper = NULL, *destination = NULL; | |
727 | _cleanup_strv_free_ char **lower = NULL; | |
728 | CustomMount *m; | |
729 | unsigned n = 0; | |
730 | char **i; | |
731 | ||
732 | lower = strv_split(optarg, ":"); | |
733 | if (!lower) | |
06c17c39 LP |
734 | return log_oom(); |
735 | ||
5a8af538 LP |
736 | STRV_FOREACH(i, lower) { |
737 | if (!path_is_absolute(*i)) { | |
738 | log_error("Overlay path %s is not absolute.", *i); | |
739 | return -EINVAL; | |
740 | } | |
741 | ||
742 | n++; | |
743 | } | |
744 | ||
745 | if (n < 2) { | |
746 | log_error("--overlay= needs at least two colon-separated directories specified."); | |
747 | return -EINVAL; | |
748 | } | |
749 | ||
750 | if (n == 2) { | |
751 | /* If two parameters are specified, | |
752 | * the first one is the lower, the | |
753 | * second one the upper directory. And | |
754 | * we'll also define the the | |
755 | * destination mount point the same as | |
756 | * the upper. */ | |
757 | upper = lower[1]; | |
758 | lower[1] = NULL; | |
759 | ||
760 | destination = strdup(upper); | |
761 | if (!destination) | |
762 | return log_oom(); | |
763 | ||
764 | } else { | |
765 | upper = lower[n - 2]; | |
766 | destination = lower[n - 1]; | |
767 | lower[n - 2] = NULL; | |
768 | } | |
769 | ||
770 | m = custom_mount_add(CUSTOM_MOUNT_OVERLAY); | |
771 | if (!m) | |
772 | return log_oom(); | |
773 | ||
774 | m->destination = destination; | |
775 | m->source = upper; | |
776 | m->lower = lower; | |
777 | m->read_only = c == ARG_OVERLAY_RO; | |
778 | ||
779 | upper = destination = NULL; | |
780 | lower = NULL; | |
06c17c39 LP |
781 | |
782 | break; | |
783 | } | |
784 | ||
f4889f65 LP |
785 | case ARG_SETENV: { |
786 | char **n; | |
787 | ||
788 | if (!env_assignment_is_valid(optarg)) { | |
789 | log_error("Environment variable assignment '%s' is not valid.", optarg); | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | n = strv_env_set(arg_setenv, optarg); | |
794 | if (!n) | |
795 | return log_oom(); | |
796 | ||
797 | strv_free(arg_setenv); | |
798 | arg_setenv = n; | |
799 | break; | |
800 | } | |
801 | ||
284c0b91 LP |
802 | case 'q': |
803 | arg_quiet = true; | |
804 | break; | |
805 | ||
8a96d94e LP |
806 | case ARG_SHARE_SYSTEM: |
807 | arg_share_system = true; | |
808 | break; | |
809 | ||
eb91eb18 LP |
810 | case ARG_REGISTER: |
811 | r = parse_boolean(optarg); | |
812 | if (r < 0) { | |
813 | log_error("Failed to parse --register= argument: %s", optarg); | |
814 | return r; | |
815 | } | |
816 | ||
817 | arg_register = r; | |
818 | break; | |
819 | ||
89f7c846 LP |
820 | case ARG_KEEP_UNIT: |
821 | arg_keep_unit = true; | |
822 | break; | |
823 | ||
6afc95b7 LP |
824 | case ARG_PERSONALITY: |
825 | ||
ac45f971 | 826 | arg_personality = personality_from_string(optarg); |
050f7277 | 827 | if (arg_personality == PERSONALITY_INVALID) { |
6afc95b7 LP |
828 | log_error("Unknown or unsupported personality '%s'.", optarg); |
829 | return -EINVAL; | |
830 | } | |
831 | ||
832 | break; | |
833 | ||
4d9f07b4 LP |
834 | case ARG_VOLATILE: |
835 | ||
836 | if (!optarg) | |
837 | arg_volatile = VOLATILE_YES; | |
838 | else { | |
839 | r = parse_boolean(optarg); | |
840 | if (r < 0) { | |
841 | if (streq(optarg, "state")) | |
842 | arg_volatile = VOLATILE_STATE; | |
843 | else { | |
844 | log_error("Failed to parse --volatile= argument: %s", optarg); | |
845 | return r; | |
846 | } | |
847 | } else | |
848 | arg_volatile = r ? VOLATILE_YES : VOLATILE_NO; | |
849 | } | |
850 | ||
851 | break; | |
852 | ||
6d0b55c2 LP |
853 | case 'p': { |
854 | const char *split, *e; | |
855 | uint16_t container_port, host_port; | |
856 | int protocol; | |
857 | ExposePort *p; | |
858 | ||
859 | if ((e = startswith(optarg, "tcp:"))) | |
860 | protocol = IPPROTO_TCP; | |
861 | else if ((e = startswith(optarg, "udp:"))) | |
862 | protocol = IPPROTO_UDP; | |
863 | else { | |
864 | e = optarg; | |
865 | protocol = IPPROTO_TCP; | |
866 | } | |
867 | ||
868 | split = strchr(e, ':'); | |
869 | if (split) { | |
870 | char v[split - e + 1]; | |
871 | ||
872 | memcpy(v, e, split - e); | |
873 | v[split - e] = 0; | |
874 | ||
875 | r = safe_atou16(v, &host_port); | |
876 | if (r < 0 || host_port <= 0) { | |
877 | log_error("Failed to parse host port: %s", optarg); | |
878 | return -EINVAL; | |
879 | } | |
880 | ||
881 | r = safe_atou16(split + 1, &container_port); | |
882 | } else { | |
883 | r = safe_atou16(e, &container_port); | |
884 | host_port = container_port; | |
885 | } | |
886 | ||
887 | if (r < 0 || container_port <= 0) { | |
888 | log_error("Failed to parse host port: %s", optarg); | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | LIST_FOREACH(ports, p, arg_expose_ports) { | |
893 | if (p->protocol == protocol && p->host_port == host_port) { | |
894 | log_error("Duplicate port specification: %s", optarg); | |
895 | return -EINVAL; | |
896 | } | |
897 | } | |
898 | ||
899 | p = new(ExposePort, 1); | |
900 | if (!p) | |
901 | return log_oom(); | |
902 | ||
903 | p->protocol = protocol; | |
904 | p->host_port = host_port; | |
905 | p->container_port = container_port; | |
906 | ||
907 | LIST_PREPEND(ports, arg_expose_ports, p); | |
908 | ||
909 | break; | |
910 | } | |
911 | ||
f36933fe LP |
912 | case ARG_PROPERTY: |
913 | if (strv_extend(&arg_property, optarg) < 0) | |
914 | return log_oom(); | |
915 | ||
916 | break; | |
917 | ||
6dac160c LP |
918 | case ARG_PRIVATE_USERS: |
919 | if (optarg) { | |
920 | _cleanup_free_ char *buffer = NULL; | |
921 | const char *range, *shift; | |
922 | ||
923 | range = strchr(optarg, ':'); | |
924 | if (range) { | |
925 | buffer = strndup(optarg, range - optarg); | |
926 | if (!buffer) | |
927 | return log_oom(); | |
928 | shift = buffer; | |
929 | ||
930 | range++; | |
931 | if (safe_atou32(range, &arg_uid_range) < 0 || arg_uid_range <= 0) { | |
932 | log_error("Failed to parse UID range: %s", range); | |
933 | return -EINVAL; | |
934 | } | |
935 | } else | |
936 | shift = optarg; | |
937 | ||
938 | if (parse_uid(shift, &arg_uid_shift) < 0) { | |
939 | log_error("Failed to parse UID: %s", optarg); | |
940 | return -EINVAL; | |
941 | } | |
942 | } | |
943 | ||
944 | arg_userns = true; | |
945 | break; | |
946 | ||
c6c8f6e2 LP |
947 | case ARG_KILL_SIGNAL: |
948 | arg_kill_signal = signal_from_string_try_harder(optarg); | |
949 | if (arg_kill_signal < 0) { | |
950 | log_error("Cannot parse signal: %s", optarg); | |
951 | return -EINVAL; | |
952 | } | |
953 | ||
954 | break; | |
955 | ||
88213476 LP |
956 | case '?': |
957 | return -EINVAL; | |
958 | ||
959 | default: | |
eb9da376 | 960 | assert_not_reached("Unhandled option"); |
88213476 | 961 | } |
88213476 | 962 | |
eb91eb18 LP |
963 | if (arg_share_system) |
964 | arg_register = false; | |
965 | ||
966 | if (arg_boot && arg_share_system) { | |
967 | log_error("--boot and --share-system may not be combined."); | |
968 | return -EINVAL; | |
969 | } | |
970 | ||
89f7c846 LP |
971 | if (arg_keep_unit && cg_pid_get_owner_uid(0, NULL) >= 0) { |
972 | log_error("--keep-unit may not be used when invoked from a user session."); | |
973 | return -EINVAL; | |
974 | } | |
975 | ||
1b9e5b12 LP |
976 | if (arg_directory && arg_image) { |
977 | log_error("--directory= and --image= may not be combined."); | |
978 | return -EINVAL; | |
979 | } | |
980 | ||
ec16945e LP |
981 | if (arg_template && arg_image) { |
982 | log_error("--template= and --image= may not be combined."); | |
983 | return -EINVAL; | |
984 | } | |
985 | ||
986 | if (arg_template && !(arg_directory || arg_machine)) { | |
987 | log_error("--template= needs --directory= or --machine=."); | |
988 | return -EINVAL; | |
989 | } | |
990 | ||
991 | if (arg_ephemeral && arg_template) { | |
992 | log_error("--ephemeral and --template= may not be combined."); | |
993 | return -EINVAL; | |
994 | } | |
995 | ||
996 | if (arg_ephemeral && arg_image) { | |
997 | log_error("--ephemeral and --image= may not be combined."); | |
998 | return -EINVAL; | |
999 | } | |
1000 | ||
df9a75e4 LP |
1001 | if (arg_ephemeral && !IN_SET(arg_link_journal, LINK_NO, LINK_AUTO)) { |
1002 | log_error("--ephemeral and --link-journal= may not be combined."); | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | ||
4d9f07b4 LP |
1006 | if (arg_volatile != VOLATILE_NO && arg_read_only) { |
1007 | log_error("Cannot combine --read-only with --volatile. Note that --volatile already implies a read-only base hierarchy."); | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | ||
6d0b55c2 LP |
1011 | if (arg_expose_ports && !arg_private_network) { |
1012 | log_error("Cannot use --port= without private networking."); | |
1013 | return -EINVAL; | |
1014 | } | |
1015 | ||
b774fb7f DH |
1016 | if (arg_userns && access("/proc/self/uid_map", F_OK) < 0) |
1017 | return log_error_errno(EOPNOTSUPP, "--private-users= is not supported, kernel compiled without user namespace support."); | |
1018 | ||
a42c8b54 LP |
1019 | arg_retain = (arg_retain | plus | (arg_private_network ? 1ULL << CAP_NET_ADMIN : 0)) & ~minus; |
1020 | ||
c6c8f6e2 LP |
1021 | if (arg_boot && arg_kill_signal <= 0) |
1022 | arg_kill_signal = SIGRTMIN+3; | |
1023 | ||
88213476 LP |
1024 | return 1; |
1025 | } | |
1026 | ||
03cfe0d5 LP |
1027 | static int tmpfs_patch_options(const char *options, char **ret) { |
1028 | char *buf = NULL; | |
1029 | ||
1030 | if (arg_userns && arg_uid_shift != 0) { | |
1031 | ||
1032 | if (options) | |
f001a835 | 1033 | (void) asprintf(&buf, "%s,uid=" UID_FMT ",gid=" UID_FMT, options, arg_uid_shift, arg_uid_shift); |
03cfe0d5 | 1034 | else |
f001a835 | 1035 | (void) asprintf(&buf, "uid=" UID_FMT ",gid=" UID_FMT, arg_uid_shift, arg_uid_shift); |
03cfe0d5 LP |
1036 | if (!buf) |
1037 | return -ENOMEM; | |
1038 | ||
1039 | options = buf; | |
1040 | } | |
1041 | ||
1042 | #ifdef HAVE_SELINUX | |
1043 | if (arg_selinux_apifs_context) { | |
1044 | char *t; | |
1045 | ||
1046 | if (options) | |
1047 | t = strjoin(options, ",context=\"", arg_selinux_apifs_context, "\"", NULL); | |
1048 | else | |
1049 | t = strjoin("context=\"", arg_selinux_apifs_context, "\"", NULL); | |
1050 | if (!t) { | |
1051 | free(buf); | |
1052 | return -ENOMEM; | |
1053 | } | |
1054 | ||
1055 | free(buf); | |
1056 | buf = t; | |
1057 | } | |
1058 | #endif | |
1059 | ||
1060 | *ret = buf; | |
1061 | return !!buf; | |
1062 | } | |
1063 | ||
1064 | static int mount_all(const char *dest, bool userns) { | |
88213476 LP |
1065 | |
1066 | typedef struct MountPoint { | |
1067 | const char *what; | |
1068 | const char *where; | |
1069 | const char *type; | |
1070 | const char *options; | |
1071 | unsigned long flags; | |
3bd66c05 | 1072 | bool fatal; |
03cfe0d5 | 1073 | bool userns; |
88213476 LP |
1074 | } MountPoint; |
1075 | ||
1076 | static const MountPoint mount_table[] = { | |
03cfe0d5 LP |
1077 | { "proc", "/proc", "proc", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, true, true }, |
1078 | { "/proc/sys", "/proc/sys", NULL, NULL, MS_BIND, true, true }, /* Bind mount first */ | |
1079 | { NULL, "/proc/sys", NULL, NULL, MS_BIND|MS_RDONLY|MS_REMOUNT, true, true }, /* Then, make it r/o */ | |
1080 | { "sysfs", "/sys", "sysfs", NULL, MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, true, false }, | |
1081 | { "tmpfs", "/sys/fs/cgroup", "tmpfs", "mode=755", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME, true, false }, | |
1082 | { "tmpfs", "/dev", "tmpfs", "mode=755", MS_NOSUID|MS_STRICTATIME, true, false }, | |
1083 | { "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, false }, | |
1084 | { "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, false }, | |
1085 | { "tmpfs", "/tmp", "tmpfs", "mode=1777", MS_STRICTATIME, true, false }, | |
9b634ea5 | 1086 | #ifdef HAVE_SELINUX |
03cfe0d5 LP |
1087 | { "/sys/fs/selinux", "/sys/fs/selinux", NULL, NULL, MS_BIND, false, false }, /* Bind mount first */ |
1088 | { NULL, "/sys/fs/selinux", NULL, NULL, MS_BIND|MS_RDONLY|MS_REMOUNT, false, false }, /* Then, make it r/o */ | |
9b634ea5 | 1089 | #endif |
88213476 LP |
1090 | }; |
1091 | ||
1092 | unsigned k; | |
03cfe0d5 | 1093 | int r; |
88213476 LP |
1094 | |
1095 | for (k = 0; k < ELEMENTSOF(mount_table); k++) { | |
d15d65a0 | 1096 | _cleanup_free_ char *where = NULL, *options = NULL; |
d002827b | 1097 | const char *o; |
88213476 | 1098 | |
03cfe0d5 LP |
1099 | if (userns != mount_table[k].userns) |
1100 | continue; | |
1101 | ||
1102 | where = prefix_root(dest, mount_table[k].where); | |
17fe0523 LP |
1103 | if (!where) |
1104 | return log_oom(); | |
88213476 | 1105 | |
e26d6ce5 | 1106 | r = path_is_mount_point(where, AT_SYMLINK_FOLLOW); |
03cfe0d5 LP |
1107 | if (r < 0 && r != -ENOENT) |
1108 | return log_error_errno(r, "Failed to detect whether %s is a mount point: %m", where); | |
88213476 | 1109 | |
9c1c7f71 | 1110 | /* Skip this entry if it is not a remount. */ |
03cfe0d5 | 1111 | if (mount_table[k].what && r > 0) |
014a9c77 LP |
1112 | continue; |
1113 | ||
03cfe0d5 LP |
1114 | r = mkdir_p(where, 0755); |
1115 | if (r < 0) { | |
1116 | if (mount_table[k].fatal) | |
1117 | return log_error_errno(r, "Failed to create directory %s: %m", where); | |
79d80fc1 | 1118 | |
03cfe0d5 | 1119 | log_warning_errno(r, "Failed to create directory %s: %m", where); |
79d80fc1 TG |
1120 | continue; |
1121 | } | |
88213476 | 1122 | |
03cfe0d5 LP |
1123 | o = mount_table[k].options; |
1124 | if (streq_ptr(mount_table[k].type, "tmpfs")) { | |
1125 | r = tmpfs_patch_options(o, &options); | |
1126 | if (r < 0) | |
6dac160c | 1127 | return log_oom(); |
03cfe0d5 LP |
1128 | if (r > 0) |
1129 | o = options; | |
6dac160c | 1130 | } |
a8828ed9 | 1131 | |
88213476 LP |
1132 | if (mount(mount_table[k].what, |
1133 | where, | |
1134 | mount_table[k].type, | |
1135 | mount_table[k].flags, | |
79d80fc1 | 1136 | o) < 0) { |
88213476 | 1137 | |
03cfe0d5 LP |
1138 | if (mount_table[k].fatal) |
1139 | return log_error_errno(errno, "mount(%s) failed: %m", where); | |
88213476 | 1140 | |
03cfe0d5 | 1141 | log_warning_errno(errno, "mount(%s) failed, ignoring: %m", where); |
88213476 | 1142 | } |
88213476 LP |
1143 | } |
1144 | ||
03cfe0d5 | 1145 | return 0; |
e58a1277 | 1146 | } |
f8440af5 | 1147 | |
5a8af538 LP |
1148 | static int mount_bind(const char *dest, CustomMount *m) { |
1149 | struct stat source_st, dest_st; | |
03cfe0d5 | 1150 | const char *where; |
5a8af538 | 1151 | int r; |
17fe0523 | 1152 | |
5a8af538 | 1153 | assert(m); |
d2421337 | 1154 | |
5a8af538 LP |
1155 | if (stat(m->source, &source_st) < 0) |
1156 | return log_error_errno(errno, "Failed to stat %s: %m", m->source); | |
17fe0523 | 1157 | |
03cfe0d5 | 1158 | where = prefix_roota(dest, m->destination); |
06c17c39 | 1159 | |
03cfe0d5 | 1160 | if (stat(where, &dest_st) >= 0) { |
5a8af538 LP |
1161 | if (S_ISDIR(source_st.st_mode) && !S_ISDIR(dest_st.st_mode)) { |
1162 | log_error("Cannot bind mount directory %s on file %s.", m->source, where); | |
1163 | return -EINVAL; | |
2ed4e5e0 | 1164 | } |
06c17c39 | 1165 | |
5a8af538 LP |
1166 | if (!S_ISDIR(source_st.st_mode) && S_ISDIR(dest_st.st_mode)) { |
1167 | log_error("Cannot bind mount file %s on directory %s.", m->source, where); | |
1168 | return -EINVAL; | |
d2421337 | 1169 | } |
17fe0523 | 1170 | |
5a8af538 LP |
1171 | } else if (errno == ENOENT) { |
1172 | r = mkdir_parents_label(where, 0755); | |
1173 | if (r < 0) | |
1174 | return log_error_errno(r, "Failed to make parents of %s: %m", where); | |
1175 | } else { | |
1176 | log_error_errno(errno, "Failed to stat %s: %m", where); | |
1177 | return -errno; | |
1178 | } | |
17fe0523 | 1179 | |
5a8af538 LP |
1180 | /* Create the mount point. Any non-directory file can be |
1181 | * mounted on any non-directory file (regular, fifo, socket, | |
1182 | * char, block). | |
1183 | */ | |
1184 | if (S_ISDIR(source_st.st_mode)) | |
1185 | r = mkdir_label(where, 0755); | |
1186 | else | |
1187 | r = touch(where); | |
1188 | if (r < 0 && r != -EEXIST) | |
1189 | return log_error_errno(r, "Failed to create mount point %s: %m", where); | |
1190 | ||
1191 | if (mount(m->source, where, NULL, MS_BIND, NULL) < 0) | |
1192 | return log_error_errno(errno, "mount(%s) failed: %m", where); | |
1193 | ||
1194 | if (m->read_only) { | |
1195 | r = bind_remount_recursive(where, true); | |
1196 | if (r < 0) | |
1197 | return log_error_errno(r, "Read-only bind mount failed: %m"); | |
1198 | } | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int mount_tmpfs(const char *dest, CustomMount *m) { | |
03cfe0d5 LP |
1204 | const char *where, *options; |
1205 | _cleanup_free_ char *buf = NULL; | |
5a8af538 LP |
1206 | int r; |
1207 | ||
1208 | assert(dest); | |
1209 | assert(m); | |
1210 | ||
03cfe0d5 | 1211 | where = prefix_roota(dest, m->destination); |
5a8af538 | 1212 | |
03cfe0d5 | 1213 | r = mkdir_p_label(where, 0755); |
5a8af538 LP |
1214 | if (r < 0 && r != -EEXIST) |
1215 | return log_error_errno(r, "Creating mount point for tmpfs %s failed: %m", where); | |
1216 | ||
03cfe0d5 LP |
1217 | r = tmpfs_patch_options(m->options, &buf); |
1218 | if (r < 0) | |
1219 | return log_oom(); | |
1220 | options = r > 0 ? buf : m->options; | |
1221 | ||
1222 | if (mount("tmpfs", where, "tmpfs", MS_NODEV|MS_STRICTATIME, options) < 0) | |
5a8af538 LP |
1223 | return log_error_errno(errno, "tmpfs mount to %s failed: %m", where); |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | static int mount_overlay(const char *dest, CustomMount *m) { | |
1229 | _cleanup_free_ char *lower = NULL; | |
03cfe0d5 | 1230 | const char *where, *options; |
5a8af538 LP |
1231 | int r; |
1232 | ||
1233 | assert(dest); | |
1234 | assert(m); | |
1235 | ||
03cfe0d5 | 1236 | where = prefix_roota(dest, m->destination); |
5a8af538 LP |
1237 | |
1238 | r = mkdir_label(where, 0755); | |
1239 | if (r < 0 && r != -EEXIST) | |
1240 | return log_error_errno(r, "Creating mount point for overlay %s failed: %m", where); | |
1241 | ||
1242 | (void) mkdir_p_label(m->source, 0755); | |
1243 | ||
1244 | strv_reverse(m->lower); | |
1245 | lower = strv_join(m->lower, ":"); | |
1246 | strv_reverse(m->lower); | |
5a8af538 LP |
1247 | if (!lower) |
1248 | return log_oom(); | |
1249 | ||
1250 | if (m->read_only) | |
1251 | options = strjoina("lowerdir=", m->source, ":", lower); | |
1252 | else { | |
1253 | assert(m->work_dir); | |
1254 | (void) mkdir_label(m->work_dir, 0700); | |
1255 | ||
1256 | options = strjoina("lowerdir=", lower, ",upperdir=", m->source, ",workdir=", m->work_dir); | |
1257 | } | |
1258 | ||
1259 | if (mount("overlay", where, "overlay", m->read_only ? MS_RDONLY : 0, options) < 0) | |
1260 | return log_error_errno(errno, "overlay mount to %s failed: %m", where); | |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | static int mount_custom(const char *dest) { | |
1266 | unsigned i; | |
1267 | int r; | |
1268 | ||
1269 | assert(dest); | |
1270 | ||
1271 | for (i = 0; i < arg_n_custom_mounts; i++) { | |
1272 | CustomMount *m = &arg_custom_mounts[i]; | |
1273 | ||
1274 | switch (m->type) { | |
1275 | ||
1276 | case CUSTOM_MOUNT_BIND: | |
1277 | r = mount_bind(dest, m); | |
1278 | break; | |
1279 | ||
1280 | case CUSTOM_MOUNT_TMPFS: | |
1281 | r = mount_tmpfs(dest, m); | |
1282 | break; | |
1283 | ||
1284 | case CUSTOM_MOUNT_OVERLAY: | |
1285 | r = mount_overlay(dest, m); | |
1286 | break; | |
1287 | ||
1288 | default: | |
1289 | assert_not_reached("Unknown custom mount type"); | |
17fe0523 | 1290 | } |
5a8af538 LP |
1291 | |
1292 | if (r < 0) | |
1293 | return r; | |
17fe0523 LP |
1294 | } |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
b12afc8c LP |
1299 | static int mount_cgroup_hierarchy(const char *dest, const char *controller, const char *hierarchy, bool read_only) { |
1300 | char *to; | |
1301 | int r; | |
1302 | ||
63c372cb | 1303 | to = strjoina(dest, "/sys/fs/cgroup/", hierarchy); |
b12afc8c | 1304 | |
e26d6ce5 | 1305 | r = path_is_mount_point(to, 0); |
da00518b | 1306 | if (r < 0 && r != -ENOENT) |
b12afc8c LP |
1307 | return log_error_errno(r, "Failed to determine if %s is mounted already: %m", to); |
1308 | if (r > 0) | |
1309 | return 0; | |
1310 | ||
1311 | mkdir_p(to, 0755); | |
1312 | ||
c0534580 LP |
1313 | /* The superblock mount options of the mount point need to be |
1314 | * identical to the hosts', and hence writable... */ | |
1315 | if (mount("cgroup", to, "cgroup", MS_NOSUID|MS_NOEXEC|MS_NODEV, controller) < 0) | |
b12afc8c LP |
1316 | return log_error_errno(errno, "Failed to mount to %s: %m", to); |
1317 | ||
c0534580 LP |
1318 | /* ... hence let's only make the bind mount read-only, not the |
1319 | * superblock. */ | |
1320 | if (read_only) { | |
1321 | if (mount(NULL, to, NULL, MS_BIND|MS_REMOUNT|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, NULL) < 0) | |
1322 | return log_error_errno(errno, "Failed to remount %s read-only: %m", to); | |
1323 | } | |
b12afc8c LP |
1324 | return 1; |
1325 | } | |
1326 | ||
1327 | static int mount_cgroup(const char *dest) { | |
1328 | _cleanup_set_free_free_ Set *controllers = NULL; | |
03cfe0d5 | 1329 | const char *cgroup_root; |
b12afc8c LP |
1330 | int r; |
1331 | ||
1332 | controllers = set_new(&string_hash_ops); | |
1333 | if (!controllers) | |
1334 | return log_oom(); | |
1335 | ||
1336 | r = cg_kernel_controllers(controllers); | |
1337 | if (r < 0) | |
1338 | return log_error_errno(r, "Failed to determine cgroup controllers: %m"); | |
1339 | ||
b12afc8c LP |
1340 | for (;;) { |
1341 | _cleanup_free_ char *controller = NULL, *origin = NULL, *combined = NULL; | |
1342 | ||
1343 | controller = set_steal_first(controllers); | |
1344 | if (!controller) | |
1345 | break; | |
1346 | ||
03cfe0d5 | 1347 | origin = prefix_root("/sys/fs/cgroup/", controller); |
b12afc8c LP |
1348 | if (!origin) |
1349 | return log_oom(); | |
1350 | ||
1351 | r = readlink_malloc(origin, &combined); | |
1352 | if (r == -EINVAL) { | |
1353 | /* Not a symbolic link, but directly a single cgroup hierarchy */ | |
1354 | ||
1355 | r = mount_cgroup_hierarchy(dest, controller, controller, true); | |
1356 | if (r < 0) | |
1357 | return r; | |
1358 | ||
1359 | } else if (r < 0) | |
1360 | return log_error_errno(r, "Failed to read link %s: %m", origin); | |
1361 | else { | |
1362 | _cleanup_free_ char *target = NULL; | |
1363 | ||
03cfe0d5 | 1364 | target = prefix_root(dest, origin); |
b12afc8c LP |
1365 | if (!target) |
1366 | return log_oom(); | |
1367 | ||
1368 | /* A symbolic link, a combination of controllers in one hierarchy */ | |
1369 | ||
1370 | if (!filename_is_valid(combined)) { | |
1371 | log_warning("Ignoring invalid combined hierarchy %s.", combined); | |
1372 | continue; | |
1373 | } | |
1374 | ||
1375 | r = mount_cgroup_hierarchy(dest, combined, combined, true); | |
1376 | if (r < 0) | |
1377 | return r; | |
1378 | ||
875e1014 ILG |
1379 | r = symlink_idempotent(combined, target); |
1380 | if (r == -EINVAL) { | |
1381 | log_error("Invalid existing symlink for combined hierarchy"); | |
1382 | return r; | |
1383 | } | |
1384 | if (r < 0) | |
1385 | return log_error_errno(r, "Failed to create symlink for combined hierarchy: %m"); | |
b12afc8c LP |
1386 | } |
1387 | } | |
1388 | ||
c0534580 | 1389 | r = mount_cgroup_hierarchy(dest, "name=systemd,xattr", "systemd", false); |
b12afc8c LP |
1390 | if (r < 0) |
1391 | return r; | |
1392 | ||
03cfe0d5 LP |
1393 | cgroup_root = prefix_roota(dest, "/sys/fs/cgroup"); |
1394 | if (mount(NULL, cgroup_root, NULL, MS_REMOUNT|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME|MS_RDONLY, "mode=755") < 0) | |
1395 | return log_error_errno(errno, "Failed to remount %s read-only: %m", cgroup_root); | |
1396 | ||
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | static int mount_systemd_cgroup_writable(const char *dest) { | |
1401 | _cleanup_free_ char *own_cgroup_path = NULL; | |
1402 | const char *systemd_root, *systemd_own; | |
1403 | int r; | |
1404 | ||
1405 | assert(dest); | |
1406 | ||
1407 | r = cg_pid_get_path(NULL, 0, &own_cgroup_path); | |
1408 | if (r < 0) | |
1409 | return log_error_errno(r, "Failed to determine our own cgroup path: %m"); | |
1410 | ||
b12afc8c | 1411 | /* Make our own cgroup a (writable) bind mount */ |
63c372cb | 1412 | systemd_own = strjoina(dest, "/sys/fs/cgroup/systemd", own_cgroup_path); |
b12afc8c LP |
1413 | if (mount(systemd_own, systemd_own, NULL, MS_BIND, NULL) < 0) |
1414 | return log_error_errno(errno, "Failed to turn %s into a bind mount: %m", own_cgroup_path); | |
1415 | ||
1416 | /* And then remount the systemd cgroup root read-only */ | |
03cfe0d5 | 1417 | systemd_root = prefix_roota(dest, "/sys/fs/cgroup/systemd"); |
b12afc8c LP |
1418 | if (mount(NULL, systemd_root, NULL, MS_BIND|MS_REMOUNT|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, NULL) < 0) |
1419 | return log_error_errno(errno, "Failed to mount cgroup root read-only: %m"); | |
1420 | ||
03cfe0d5 LP |
1421 | return 0; |
1422 | } | |
1423 | ||
1424 | static int userns_lchown(const char *p, uid_t uid, gid_t gid) { | |
1425 | assert(p); | |
1426 | ||
1427 | if (!arg_userns) | |
1428 | return 0; | |
1429 | ||
1430 | if (uid == UID_INVALID && gid == GID_INVALID) | |
1431 | return 0; | |
1432 | ||
1433 | if (uid != UID_INVALID) { | |
1434 | uid += arg_uid_shift; | |
1435 | ||
1436 | if (uid < arg_uid_shift || uid >= arg_uid_shift + arg_uid_range) | |
1437 | return -EOVERFLOW; | |
1438 | } | |
1439 | ||
1440 | if (gid != GID_INVALID) { | |
1441 | gid += (gid_t) arg_uid_shift; | |
1442 | ||
1443 | if (gid < (gid_t) arg_uid_shift || gid >= (gid_t) (arg_uid_shift + arg_uid_range)) | |
1444 | return -EOVERFLOW; | |
1445 | } | |
1446 | ||
1447 | if (lchown(p, uid, gid) < 0) | |
1448 | return -errno; | |
b12afc8c LP |
1449 | |
1450 | return 0; | |
1451 | } | |
1452 | ||
03cfe0d5 LP |
1453 | static int userns_mkdir(const char *root, const char *path, mode_t mode, uid_t uid, gid_t gid) { |
1454 | const char *q; | |
1455 | ||
1456 | q = prefix_roota(root, path); | |
1457 | if (mkdir(q, mode) < 0) { | |
1458 | if (errno == EEXIST) | |
1459 | return 0; | |
1460 | return -errno; | |
1461 | } | |
1462 | ||
1463 | return userns_lchown(q, uid, gid); | |
1464 | } | |
1465 | ||
e58a1277 | 1466 | static int setup_timezone(const char *dest) { |
03cfe0d5 LP |
1467 | _cleanup_free_ char *p = NULL, *q = NULL; |
1468 | const char *where, *check, *what; | |
d4036145 LP |
1469 | char *z, *y; |
1470 | int r; | |
f8440af5 | 1471 | |
e58a1277 LP |
1472 | assert(dest); |
1473 | ||
1474 | /* Fix the timezone, if possible */ | |
d4036145 LP |
1475 | r = readlink_malloc("/etc/localtime", &p); |
1476 | if (r < 0) { | |
1477 | log_warning("/etc/localtime is not a symlink, not updating container timezone."); | |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | z = path_startswith(p, "../usr/share/zoneinfo/"); | |
1482 | if (!z) | |
1483 | z = path_startswith(p, "/usr/share/zoneinfo/"); | |
1484 | if (!z) { | |
1485 | log_warning("/etc/localtime does not point into /usr/share/zoneinfo/, not updating container timezone."); | |
1486 | return 0; | |
1487 | } | |
1488 | ||
03cfe0d5 | 1489 | where = prefix_roota(dest, "/etc/localtime"); |
d4036145 LP |
1490 | r = readlink_malloc(where, &q); |
1491 | if (r >= 0) { | |
1492 | y = path_startswith(q, "../usr/share/zoneinfo/"); | |
1493 | if (!y) | |
1494 | y = path_startswith(q, "/usr/share/zoneinfo/"); | |
4d1c38b8 | 1495 | |
d4036145 LP |
1496 | /* Already pointing to the right place? Then do nothing .. */ |
1497 | if (y && streq(y, z)) | |
1498 | return 0; | |
1499 | } | |
1500 | ||
03cfe0d5 LP |
1501 | check = strjoina("/usr/share/zoneinfo/", z); |
1502 | check = prefix_root(dest, check); | |
1503 | if (laccess(check, F_OK) < 0) { | |
d4036145 LP |
1504 | log_warning("Timezone %s does not exist in container, not updating container timezone.", z); |
1505 | return 0; | |
1506 | } | |
68fb0892 | 1507 | |
79d80fc1 TG |
1508 | r = unlink(where); |
1509 | if (r < 0 && errno != ENOENT) { | |
56f64d95 | 1510 | log_error_errno(errno, "Failed to remove existing timezone info %s in container: %m", where); |
79d80fc1 TG |
1511 | return 0; |
1512 | } | |
4d9f07b4 | 1513 | |
03cfe0d5 | 1514 | what = strjoina("../usr/share/zoneinfo/", z); |
d4036145 | 1515 | if (symlink(what, where) < 0) { |
56f64d95 | 1516 | log_error_errno(errno, "Failed to correct timezone of container: %m"); |
d4036145 LP |
1517 | return 0; |
1518 | } | |
e58a1277 | 1519 | |
03cfe0d5 LP |
1520 | r = userns_lchown(where, 0, 0); |
1521 | if (r < 0) | |
1522 | return log_warning_errno(r, "Failed to chown /etc/localtime: %m"); | |
1523 | ||
e58a1277 | 1524 | return 0; |
88213476 LP |
1525 | } |
1526 | ||
2547bb41 | 1527 | static int setup_resolv_conf(const char *dest) { |
03cfe0d5 | 1528 | const char *where = NULL; |
79d80fc1 | 1529 | int r; |
2547bb41 LP |
1530 | |
1531 | assert(dest); | |
1532 | ||
1533 | if (arg_private_network) | |
1534 | return 0; | |
1535 | ||
1536 | /* Fix resolv.conf, if possible */ | |
03cfe0d5 | 1537 | where = prefix_roota(dest, "/etc/resolv.conf"); |
79d80fc1 | 1538 | |
f2068bcc | 1539 | r = copy_file("/etc/resolv.conf", where, O_TRUNC|O_NOFOLLOW, 0644, 0); |
79d80fc1 | 1540 | if (r < 0) { |
68a313c5 LP |
1541 | /* If the file already exists as symlink, let's |
1542 | * suppress the warning, under the assumption that | |
1543 | * resolved or something similar runs inside and the | |
1544 | * symlink points there. | |
1545 | * | |
1546 | * If the disk image is read-only, there's also no | |
1547 | * point in complaining. | |
1548 | */ | |
1549 | log_full_errno(IN_SET(r, -ELOOP, -EROFS) ? LOG_DEBUG : LOG_WARNING, r, | |
1550 | "Failed to copy /etc/resolv.conf to %s: %m", where); | |
79d80fc1 TG |
1551 | return 0; |
1552 | } | |
2547bb41 | 1553 | |
03cfe0d5 LP |
1554 | r = userns_lchown(where, 0, 0); |
1555 | if (r < 0) | |
1556 | log_warning_errno(r, "Failed to chown /etc/resolv.conf: %m"); | |
1557 | ||
2547bb41 LP |
1558 | return 0; |
1559 | } | |
1560 | ||
4d9f07b4 | 1561 | static int setup_volatile_state(const char *directory) { |
03cfe0d5 LP |
1562 | _cleanup_free_ char *buf = NULL; |
1563 | const char *p, *options; | |
4d9f07b4 LP |
1564 | int r; |
1565 | ||
1566 | assert(directory); | |
1567 | ||
1568 | if (arg_volatile != VOLATILE_STATE) | |
1569 | return 0; | |
1570 | ||
1571 | /* --volatile=state means we simply overmount /var | |
1572 | with a tmpfs, and the rest read-only. */ | |
1573 | ||
1574 | r = bind_remount_recursive(directory, true); | |
f647962d MS |
1575 | if (r < 0) |
1576 | return log_error_errno(r, "Failed to remount %s read-only: %m", directory); | |
4d9f07b4 | 1577 | |
03cfe0d5 | 1578 | p = prefix_roota(directory, "/var"); |
79d80fc1 | 1579 | r = mkdir(p, 0755); |
4a62c710 MS |
1580 | if (r < 0 && errno != EEXIST) |
1581 | return log_error_errno(errno, "Failed to create %s: %m", directory); | |
4d9f07b4 | 1582 | |
03cfe0d5 LP |
1583 | options = "mode=755"; |
1584 | r = tmpfs_patch_options(options, &buf); | |
1585 | if (r < 0) | |
1586 | return log_oom(); | |
1587 | if (r > 0) | |
1588 | options = buf; | |
1589 | ||
1590 | if (mount("tmpfs", p, "tmpfs", MS_STRICTATIME, options) < 0) | |
4a62c710 | 1591 | return log_error_errno(errno, "Failed to mount tmpfs to /var: %m"); |
4d9f07b4 LP |
1592 | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | static int setup_volatile(const char *directory) { | |
1597 | bool tmpfs_mounted = false, bind_mounted = false; | |
1598 | char template[] = "/tmp/nspawn-volatile-XXXXXX"; | |
03cfe0d5 LP |
1599 | _cleanup_free_ char *buf = NULL; |
1600 | const char *f, *t, *options; | |
4d9f07b4 LP |
1601 | int r; |
1602 | ||
1603 | assert(directory); | |
1604 | ||
1605 | if (arg_volatile != VOLATILE_YES) | |
1606 | return 0; | |
1607 | ||
1608 | /* --volatile=yes means we mount a tmpfs to the root dir, and | |
1609 | the original /usr to use inside it, and that read-only. */ | |
1610 | ||
4a62c710 MS |
1611 | if (!mkdtemp(template)) |
1612 | return log_error_errno(errno, "Failed to create temporary directory: %m"); | |
4d9f07b4 | 1613 | |
03cfe0d5 LP |
1614 | options = "mode=755"; |
1615 | r = tmpfs_patch_options(options, &buf); | |
1616 | if (r < 0) | |
1617 | return log_oom(); | |
1618 | if (r > 0) | |
1619 | options = buf; | |
1620 | ||
1621 | if (mount("tmpfs", template, "tmpfs", MS_STRICTATIME, options) < 0) { | |
1622 | r = log_error_errno(errno, "Failed to mount tmpfs for root directory: %m"); | |
4d9f07b4 LP |
1623 | goto fail; |
1624 | } | |
1625 | ||
1626 | tmpfs_mounted = true; | |
1627 | ||
03cfe0d5 LP |
1628 | f = prefix_roota(directory, "/usr"); |
1629 | t = prefix_roota(template, "/usr"); | |
4d9f07b4 | 1630 | |
79d80fc1 TG |
1631 | r = mkdir(t, 0755); |
1632 | if (r < 0 && errno != EEXIST) { | |
03cfe0d5 | 1633 | r = log_error_errno(errno, "Failed to create %s: %m", t); |
79d80fc1 TG |
1634 | goto fail; |
1635 | } | |
1636 | ||
4543768d | 1637 | if (mount(f, t, NULL, MS_BIND|MS_REC, NULL) < 0) { |
03cfe0d5 | 1638 | r = log_error_errno(errno, "Failed to create /usr bind mount: %m"); |
4d9f07b4 LP |
1639 | goto fail; |
1640 | } | |
1641 | ||
1642 | bind_mounted = true; | |
1643 | ||
1644 | r = bind_remount_recursive(t, true); | |
1645 | if (r < 0) { | |
da927ba9 | 1646 | log_error_errno(r, "Failed to remount %s read-only: %m", t); |
4d9f07b4 LP |
1647 | goto fail; |
1648 | } | |
1649 | ||
1650 | if (mount(template, directory, NULL, MS_MOVE, NULL) < 0) { | |
03cfe0d5 | 1651 | r = log_error_errno(errno, "Failed to move root mount: %m"); |
4d9f07b4 LP |
1652 | goto fail; |
1653 | } | |
1654 | ||
03cfe0d5 | 1655 | (void) rmdir(template); |
4d9f07b4 LP |
1656 | |
1657 | return 0; | |
1658 | ||
1659 | fail: | |
1660 | if (bind_mounted) | |
03cfe0d5 LP |
1661 | (void) umount(t); |
1662 | ||
4d9f07b4 | 1663 | if (tmpfs_mounted) |
03cfe0d5 LP |
1664 | (void) umount(template); |
1665 | (void) rmdir(template); | |
4d9f07b4 LP |
1666 | return r; |
1667 | } | |
1668 | ||
9f24adc2 | 1669 | static char* id128_format_as_uuid(sd_id128_t id, char s[37]) { |
03cfe0d5 | 1670 | assert(s); |
9f24adc2 LP |
1671 | |
1672 | snprintf(s, 37, | |
1673 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", | |
1674 | SD_ID128_FORMAT_VAL(id)); | |
1675 | ||
1676 | return s; | |
1677 | } | |
1678 | ||
04bc4a3f | 1679 | static int setup_boot_id(const char *dest) { |
03cfe0d5 | 1680 | const char *from, *to; |
39883f62 | 1681 | sd_id128_t rnd = {}; |
04bc4a3f LP |
1682 | char as_uuid[37]; |
1683 | int r; | |
1684 | ||
eb91eb18 LP |
1685 | if (arg_share_system) |
1686 | return 0; | |
1687 | ||
04bc4a3f LP |
1688 | /* Generate a new randomized boot ID, so that each boot-up of |
1689 | * the container gets a new one */ | |
1690 | ||
03cfe0d5 LP |
1691 | from = prefix_roota(dest, "/run/proc-sys-kernel-random-boot-id"); |
1692 | to = prefix_roota(dest, "/proc/sys/kernel/random/boot_id"); | |
04bc4a3f LP |
1693 | |
1694 | r = sd_id128_randomize(&rnd); | |
f647962d MS |
1695 | if (r < 0) |
1696 | return log_error_errno(r, "Failed to generate random boot id: %m"); | |
04bc4a3f | 1697 | |
9f24adc2 | 1698 | id128_format_as_uuid(rnd, as_uuid); |
04bc4a3f | 1699 | |
574d5f2d | 1700 | r = write_string_file(from, as_uuid); |
f647962d MS |
1701 | if (r < 0) |
1702 | return log_error_errno(r, "Failed to write boot id: %m"); | |
04bc4a3f | 1703 | |
03cfe0d5 LP |
1704 | if (mount(from, to, NULL, MS_BIND, NULL) < 0) |
1705 | r = log_error_errno(errno, "Failed to bind mount boot id: %m"); | |
1706 | else if (mount(NULL, to, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY|MS_NOSUID|MS_NODEV, NULL) < 0) | |
56f64d95 | 1707 | log_warning_errno(errno, "Failed to make boot id read-only: %m"); |
04bc4a3f LP |
1708 | |
1709 | unlink(from); | |
04bc4a3f LP |
1710 | return r; |
1711 | } | |
1712 | ||
e58a1277 | 1713 | static int copy_devnodes(const char *dest) { |
88213476 LP |
1714 | |
1715 | static const char devnodes[] = | |
1716 | "null\0" | |
1717 | "zero\0" | |
1718 | "full\0" | |
1719 | "random\0" | |
1720 | "urandom\0" | |
85614d66 TG |
1721 | "tty\0" |
1722 | "net/tun\0"; | |
88213476 LP |
1723 | |
1724 | const char *d; | |
e58a1277 | 1725 | int r = 0; |
7fd1b19b | 1726 | _cleanup_umask_ mode_t u; |
a258bf26 LP |
1727 | |
1728 | assert(dest); | |
124640f1 LP |
1729 | |
1730 | u = umask(0000); | |
88213476 | 1731 | |
03cfe0d5 LP |
1732 | /* Create /dev/net, so that we can create /dev/net/tun in it */ |
1733 | if (userns_mkdir(dest, "/dev/net", 0755, 0, 0) < 0) | |
1734 | return log_error_errno(r, "Failed to create /dev/net directory: %m"); | |
1735 | ||
88213476 | 1736 | NULSTR_FOREACH(d, devnodes) { |
7fd1b19b | 1737 | _cleanup_free_ char *from = NULL, *to = NULL; |
7f112f50 | 1738 | struct stat st; |
88213476 | 1739 | |
7f112f50 | 1740 | from = strappend("/dev/", d); |
03cfe0d5 | 1741 | to = prefix_root(dest, from); |
88213476 LP |
1742 | |
1743 | if (stat(from, &st) < 0) { | |
1744 | ||
4a62c710 MS |
1745 | if (errno != ENOENT) |
1746 | return log_error_errno(errno, "Failed to stat %s: %m", from); | |
88213476 | 1747 | |
a258bf26 | 1748 | } else if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) { |
88213476 | 1749 | |
03cfe0d5 | 1750 | log_error("%s is not a char or block device, cannot copy.", from); |
7f112f50 | 1751 | return -EIO; |
a258bf26 | 1752 | |
85614d66 | 1753 | } else { |
81f5049b AC |
1754 | if (mknod(to, st.st_mode, st.st_rdev) < 0) { |
1755 | if (errno != EPERM) | |
1756 | return log_error_errno(errno, "mknod(%s) failed: %m", to); | |
1757 | ||
1758 | /* Some systems abusively restrict mknod but | |
1759 | * allow bind mounts. */ | |
1760 | r = touch(to); | |
1761 | if (r < 0) | |
1762 | return log_error_errno(r, "touch (%s) failed: %m", to); | |
1763 | if (mount(from, to, NULL, MS_BIND, NULL) < 0) | |
1764 | return log_error_errno(errno, "Both mknod and bind mount (%s) failed: %m", to); | |
1765 | } | |
6278cf60 | 1766 | |
03cfe0d5 LP |
1767 | r = userns_lchown(to, 0, 0); |
1768 | if (r < 0) | |
1769 | return log_error_errno(r, "chown() of device node %s failed: %m", to); | |
88213476 | 1770 | } |
88213476 LP |
1771 | } |
1772 | ||
e58a1277 LP |
1773 | return r; |
1774 | } | |
88213476 | 1775 | |
03cfe0d5 LP |
1776 | static int setup_pts(const char *dest) { |
1777 | _cleanup_free_ char *options = NULL; | |
1778 | const char *p; | |
1779 | ||
1780 | #ifdef HAVE_SELINUX | |
1781 | if (arg_selinux_apifs_context) | |
1782 | (void) asprintf(&options, | |
1783 | "newinstance,ptmxmode=0666,mode=620,uid=" UID_FMT ",gid=" GID_FMT ",context=\"%s\"", | |
1784 | arg_uid_shift, | |
1785 | arg_uid_shift + TTY_GID, | |
1786 | arg_selinux_apifs_context); | |
1787 | else | |
1788 | #endif | |
1789 | (void) asprintf(&options, | |
1790 | "newinstance,ptmxmode=0666,mode=620,uid=" UID_FMT ",gid=" GID_FMT, | |
1791 | arg_uid_shift, | |
1792 | arg_uid_shift + TTY_GID); | |
f2d88580 | 1793 | |
03cfe0d5 | 1794 | if (!options) |
f2d88580 LP |
1795 | return log_oom(); |
1796 | ||
03cfe0d5 | 1797 | /* Mount /dev/pts itself */ |
cc9fce65 | 1798 | p = prefix_roota(dest, "/dev/pts"); |
03cfe0d5 LP |
1799 | if (mkdir(p, 0755) < 0) |
1800 | return log_error_errno(errno, "Failed to create /dev/pts: %m"); | |
1801 | if (mount("devpts", p, "devpts", MS_NOSUID|MS_NOEXEC, options) < 0) | |
1802 | return log_error_errno(errno, "Failed to mount /dev/pts: %m"); | |
1803 | if (userns_lchown(p, 0, 0) < 0) | |
1804 | return log_error_errno(errno, "Failed to chown /dev/pts: %m"); | |
1805 | ||
1806 | /* Create /dev/ptmx symlink */ | |
1807 | p = prefix_roota(dest, "/dev/ptmx"); | |
4a62c710 MS |
1808 | if (symlink("pts/ptmx", p) < 0) |
1809 | return log_error_errno(errno, "Failed to create /dev/ptmx symlink: %m"); | |
03cfe0d5 LP |
1810 | if (userns_lchown(p, 0, 0) < 0) |
1811 | return log_error_errno(errno, "Failed to chown /dev/ptmx: %m"); | |
f2d88580 | 1812 | |
03cfe0d5 LP |
1813 | /* And fix /dev/pts/ptmx ownership */ |
1814 | p = prefix_roota(dest, "/dev/pts/ptmx"); | |
1815 | if (userns_lchown(p, 0, 0) < 0) | |
1816 | return log_error_errno(errno, "Failed to chown /dev/pts/ptmx: %m"); | |
6278cf60 | 1817 | |
f2d88580 LP |
1818 | return 0; |
1819 | } | |
1820 | ||
e58a1277 | 1821 | static int setup_dev_console(const char *dest, const char *console) { |
eb0f0863 LP |
1822 | _cleanup_umask_ mode_t u; |
1823 | const char *to; | |
e58a1277 | 1824 | int r; |
e58a1277 LP |
1825 | |
1826 | assert(dest); | |
1827 | assert(console); | |
1828 | ||
1829 | u = umask(0000); | |
1830 | ||
03cfe0d5 | 1831 | r = chmod_and_chown(console, 0600, arg_uid_shift, arg_uid_shift); |
f647962d MS |
1832 | if (r < 0) |
1833 | return log_error_errno(r, "Failed to correct access mode for TTY: %m"); | |
88213476 | 1834 | |
a258bf26 LP |
1835 | /* We need to bind mount the right tty to /dev/console since |
1836 | * ptys can only exist on pts file systems. To have something | |
81f5049b | 1837 | * to bind mount things on we create a empty regular file. */ |
a258bf26 | 1838 | |
03cfe0d5 | 1839 | to = prefix_roota(dest, "/dev/console"); |
81f5049b AC |
1840 | r = touch(to); |
1841 | if (r < 0) | |
1842 | return log_error_errno(r, "touch() for /dev/console failed: %m"); | |
a258bf26 | 1843 | |
4543768d | 1844 | if (mount(console, to, NULL, MS_BIND, NULL) < 0) |
4a62c710 | 1845 | return log_error_errno(errno, "Bind mount for /dev/console failed: %m"); |
a258bf26 | 1846 | |
25ea79fe | 1847 | return 0; |
e58a1277 LP |
1848 | } |
1849 | ||
1850 | static int setup_kmsg(const char *dest, int kmsg_socket) { | |
03cfe0d5 | 1851 | const char *from, *to; |
7fd1b19b | 1852 | _cleanup_umask_ mode_t u; |
03cfe0d5 | 1853 | int fd, k; |
e58a1277 LP |
1854 | union { |
1855 | struct cmsghdr cmsghdr; | |
1856 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
b92bea5d ZJS |
1857 | } control = {}; |
1858 | struct msghdr mh = { | |
1859 | .msg_control = &control, | |
1860 | .msg_controllen = sizeof(control), | |
1861 | }; | |
e58a1277 LP |
1862 | struct cmsghdr *cmsg; |
1863 | ||
e58a1277 | 1864 | assert(kmsg_socket >= 0); |
a258bf26 | 1865 | |
e58a1277 | 1866 | u = umask(0000); |
a258bf26 | 1867 | |
03cfe0d5 | 1868 | /* We create the kmsg FIFO as /run/kmsg, but immediately |
f1e5dfe2 LP |
1869 | * delete it after bind mounting it to /proc/kmsg. While FIFOs |
1870 | * on the reading side behave very similar to /proc/kmsg, | |
1871 | * their writing side behaves differently from /dev/kmsg in | |
1872 | * that writing blocks when nothing is reading. In order to | |
1873 | * avoid any problems with containers deadlocking due to this | |
1874 | * we simply make /dev/kmsg unavailable to the container. */ | |
03cfe0d5 LP |
1875 | from = prefix_roota(dest, "/run/kmsg"); |
1876 | to = prefix_roota(dest, "/proc/kmsg"); | |
e58a1277 | 1877 | |
4a62c710 | 1878 | if (mkfifo(from, 0600) < 0) |
03cfe0d5 | 1879 | return log_error_errno(errno, "mkfifo() for /run/kmsg failed: %m"); |
4543768d | 1880 | if (mount(from, to, NULL, MS_BIND, NULL) < 0) |
4a62c710 | 1881 | return log_error_errno(errno, "Bind mount for /proc/kmsg failed: %m"); |
e58a1277 LP |
1882 | |
1883 | fd = open(from, O_RDWR|O_NDELAY|O_CLOEXEC); | |
4a62c710 MS |
1884 | if (fd < 0) |
1885 | return log_error_errno(errno, "Failed to open fifo: %m"); | |
e58a1277 | 1886 | |
e58a1277 LP |
1887 | cmsg = CMSG_FIRSTHDR(&mh); |
1888 | cmsg->cmsg_level = SOL_SOCKET; | |
1889 | cmsg->cmsg_type = SCM_RIGHTS; | |
1890 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
1891 | memcpy(CMSG_DATA(cmsg), &fd, sizeof(int)); | |
1892 | ||
1893 | mh.msg_controllen = cmsg->cmsg_len; | |
1894 | ||
1895 | /* Store away the fd in the socket, so that it stays open as | |
1896 | * long as we run the child */ | |
6d0b55c2 | 1897 | k = sendmsg(kmsg_socket, &mh, MSG_NOSIGNAL); |
03e334a1 | 1898 | safe_close(fd); |
e58a1277 | 1899 | |
4a62c710 MS |
1900 | if (k < 0) |
1901 | return log_error_errno(errno, "Failed to send FIFO fd: %m"); | |
a258bf26 | 1902 | |
03cfe0d5 LP |
1903 | /* And now make the FIFO unavailable as /run/kmsg... */ |
1904 | (void) unlink(from); | |
1905 | ||
25ea79fe | 1906 | return 0; |
88213476 LP |
1907 | } |
1908 | ||
6d0b55c2 LP |
1909 | static int send_rtnl(int send_fd) { |
1910 | union { | |
1911 | struct cmsghdr cmsghdr; | |
1912 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
1913 | } control = {}; | |
1914 | struct msghdr mh = { | |
1915 | .msg_control = &control, | |
1916 | .msg_controllen = sizeof(control), | |
1917 | }; | |
1918 | struct cmsghdr *cmsg; | |
1919 | _cleanup_close_ int fd = -1; | |
1920 | ssize_t k; | |
1921 | ||
1922 | assert(send_fd >= 0); | |
1923 | ||
1924 | if (!arg_expose_ports) | |
1925 | return 0; | |
1926 | ||
1927 | fd = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_ROUTE); | |
1928 | if (fd < 0) | |
03cfe0d5 | 1929 | return log_error_errno(errno, "Failed to allocate container netlink: %m"); |
6d0b55c2 LP |
1930 | |
1931 | cmsg = CMSG_FIRSTHDR(&mh); | |
1932 | cmsg->cmsg_level = SOL_SOCKET; | |
1933 | cmsg->cmsg_type = SCM_RIGHTS; | |
1934 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
1935 | memcpy(CMSG_DATA(cmsg), &fd, sizeof(int)); | |
1936 | ||
1937 | mh.msg_controllen = cmsg->cmsg_len; | |
1938 | ||
1939 | /* Store away the fd in the socket, so that it stays open as | |
1940 | * long as we run the child */ | |
1941 | k = sendmsg(send_fd, &mh, MSG_NOSIGNAL); | |
1942 | if (k < 0) | |
1943 | return log_error_errno(errno, "Failed to send netlink fd: %m"); | |
1944 | ||
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static int flush_ports(union in_addr_union *exposed) { | |
1949 | ExposePort *p; | |
1950 | int r, af = AF_INET; | |
1951 | ||
1952 | assert(exposed); | |
1953 | ||
1954 | if (!arg_expose_ports) | |
1955 | return 0; | |
1956 | ||
1957 | if (in_addr_is_null(af, exposed)) | |
1958 | return 0; | |
1959 | ||
1960 | log_debug("Lost IP address."); | |
1961 | ||
1962 | LIST_FOREACH(ports, p, arg_expose_ports) { | |
1963 | r = fw_add_local_dnat(false, | |
1964 | af, | |
1965 | p->protocol, | |
1966 | NULL, | |
1967 | NULL, 0, | |
1968 | NULL, 0, | |
1969 | p->host_port, | |
1970 | exposed, | |
1971 | p->container_port, | |
1972 | NULL); | |
1973 | if (r < 0) | |
1974 | log_warning_errno(r, "Failed to modify firewall: %m"); | |
1975 | } | |
1976 | ||
1977 | *exposed = IN_ADDR_NULL; | |
1978 | return 0; | |
1979 | } | |
1980 | ||
1c4baffc | 1981 | static int expose_ports(sd_netlink *rtnl, union in_addr_union *exposed) { |
6d0b55c2 LP |
1982 | _cleanup_free_ struct local_address *addresses = NULL; |
1983 | _cleanup_free_ char *pretty = NULL; | |
1984 | union in_addr_union new_exposed; | |
1985 | ExposePort *p; | |
1986 | bool add; | |
1987 | int af = AF_INET, r; | |
1988 | ||
1989 | assert(exposed); | |
1990 | ||
1991 | /* Invoked each time an address is added or removed inside the | |
1992 | * container */ | |
1993 | ||
1994 | if (!arg_expose_ports) | |
1995 | return 0; | |
1996 | ||
1997 | r = local_addresses(rtnl, 0, af, &addresses); | |
1998 | if (r < 0) | |
1999 | return log_error_errno(r, "Failed to enumerate local addresses: %m"); | |
2000 | ||
2001 | add = r > 0 && | |
2002 | addresses[0].family == af && | |
2003 | addresses[0].scope < RT_SCOPE_LINK; | |
2004 | ||
2005 | if (!add) | |
2006 | return flush_ports(exposed); | |
2007 | ||
2008 | new_exposed = addresses[0].address; | |
2009 | if (in_addr_equal(af, exposed, &new_exposed)) | |
2010 | return 0; | |
2011 | ||
2012 | in_addr_to_string(af, &new_exposed, &pretty); | |
2013 | log_debug("New container IP is %s.", strna(pretty)); | |
2014 | ||
2015 | LIST_FOREACH(ports, p, arg_expose_ports) { | |
2016 | ||
2017 | r = fw_add_local_dnat(true, | |
2018 | af, | |
2019 | p->protocol, | |
2020 | NULL, | |
2021 | NULL, 0, | |
2022 | NULL, 0, | |
2023 | p->host_port, | |
2024 | &new_exposed, | |
2025 | p->container_port, | |
2026 | in_addr_is_null(af, exposed) ? NULL : exposed); | |
2027 | if (r < 0) | |
2028 | log_warning_errno(r, "Failed to modify firewall: %m"); | |
2029 | } | |
2030 | ||
2031 | *exposed = new_exposed; | |
2032 | return 0; | |
2033 | } | |
2034 | ||
1c4baffc | 2035 | static int on_address_change(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
6d0b55c2 LP |
2036 | union in_addr_union *exposed = userdata; |
2037 | ||
2038 | assert(rtnl); | |
2039 | assert(m); | |
2040 | assert(exposed); | |
2041 | ||
2042 | expose_ports(rtnl, exposed); | |
2043 | return 0; | |
2044 | } | |
2045 | ||
1c4baffc | 2046 | static int watch_rtnl(sd_event *event, int recv_fd, union in_addr_union *exposed, sd_netlink **ret) { |
6d0b55c2 LP |
2047 | union { |
2048 | struct cmsghdr cmsghdr; | |
2049 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
2050 | } control = {}; | |
2051 | struct msghdr mh = { | |
2052 | .msg_control = &control, | |
2053 | .msg_controllen = sizeof(control), | |
2054 | }; | |
2055 | struct cmsghdr *cmsg; | |
1c4baffc | 2056 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; |
6d0b55c2 LP |
2057 | int fd, r; |
2058 | ssize_t k; | |
2059 | ||
2060 | assert(event); | |
2061 | assert(recv_fd >= 0); | |
2062 | assert(ret); | |
2063 | ||
2064 | if (!arg_expose_ports) | |
2065 | return 0; | |
2066 | ||
2067 | k = recvmsg(recv_fd, &mh, MSG_NOSIGNAL); | |
2068 | if (k < 0) | |
2069 | return log_error_errno(errno, "Failed to recv netlink fd: %m"); | |
2070 | ||
2071 | cmsg = CMSG_FIRSTHDR(&mh); | |
2072 | assert(cmsg->cmsg_level == SOL_SOCKET); | |
2073 | assert(cmsg->cmsg_type == SCM_RIGHTS); | |
657bdca9 | 2074 | assert(cmsg->cmsg_len == CMSG_LEN(sizeof(int))); |
6d0b55c2 LP |
2075 | memcpy(&fd, CMSG_DATA(cmsg), sizeof(int)); |
2076 | ||
1c4baffc | 2077 | r = sd_netlink_open_fd(&rtnl, fd); |
6d0b55c2 LP |
2078 | if (r < 0) { |
2079 | safe_close(fd); | |
2080 | return log_error_errno(r, "Failed to create rtnl object: %m"); | |
2081 | } | |
2082 | ||
1c4baffc | 2083 | r = sd_netlink_add_match(rtnl, RTM_NEWADDR, on_address_change, exposed); |
6d0b55c2 LP |
2084 | if (r < 0) |
2085 | return log_error_errno(r, "Failed to subscribe to RTM_NEWADDR messages: %m"); | |
2086 | ||
1c4baffc | 2087 | r = sd_netlink_add_match(rtnl, RTM_DELADDR, on_address_change, exposed); |
6d0b55c2 LP |
2088 | if (r < 0) |
2089 | return log_error_errno(r, "Failed to subscribe to RTM_DELADDR messages: %m"); | |
2090 | ||
1c4baffc | 2091 | r = sd_netlink_attach_event(rtnl, event, 0); |
6d0b55c2 LP |
2092 | if (r < 0) |
2093 | return log_error_errno(r, "Failed to add to even loop: %m"); | |
2094 | ||
2095 | *ret = rtnl; | |
2096 | rtnl = NULL; | |
2097 | ||
2098 | return 0; | |
2099 | } | |
2100 | ||
3a74cea5 | 2101 | static int setup_hostname(void) { |
3a74cea5 | 2102 | |
eb91eb18 LP |
2103 | if (arg_share_system) |
2104 | return 0; | |
2105 | ||
605f81a8 | 2106 | if (sethostname_idempotent(arg_machine) < 0) |
7027ff61 | 2107 | return -errno; |
3a74cea5 | 2108 | |
7027ff61 | 2109 | return 0; |
3a74cea5 LP |
2110 | } |
2111 | ||
57fb9fb5 | 2112 | static int setup_journal(const char *directory) { |
4d680aee | 2113 | sd_id128_t machine_id, this_id; |
03cfe0d5 LP |
2114 | _cleanup_free_ char *b = NULL, *d = NULL; |
2115 | const char *etc_machine_id, *p, *q; | |
27407a01 | 2116 | char *id; |
57fb9fb5 LP |
2117 | int r; |
2118 | ||
df9a75e4 LP |
2119 | /* Don't link journals in ephemeral mode */ |
2120 | if (arg_ephemeral) | |
2121 | return 0; | |
2122 | ||
03cfe0d5 | 2123 | etc_machine_id = prefix_roota(directory, "/etc/machine-id"); |
57fb9fb5 | 2124 | |
03cfe0d5 | 2125 | r = read_one_line_file(etc_machine_id, &b); |
27407a01 ZJS |
2126 | if (r == -ENOENT && arg_link_journal == LINK_AUTO) |
2127 | return 0; | |
f647962d | 2128 | else if (r < 0) |
03cfe0d5 | 2129 | return log_error_errno(r, "Failed to read machine ID from %s: %m", etc_machine_id); |
57fb9fb5 | 2130 | |
27407a01 ZJS |
2131 | id = strstrip(b); |
2132 | if (isempty(id) && arg_link_journal == LINK_AUTO) | |
2133 | return 0; | |
57fb9fb5 | 2134 | |
27407a01 ZJS |
2135 | /* Verify validity */ |
2136 | r = sd_id128_from_string(id, &machine_id); | |
f647962d | 2137 | if (r < 0) |
03cfe0d5 | 2138 | return log_error_errno(r, "Failed to parse machine ID from %s: %m", etc_machine_id); |
57fb9fb5 | 2139 | |
4d680aee | 2140 | r = sd_id128_get_machine(&this_id); |
f647962d MS |
2141 | if (r < 0) |
2142 | return log_error_errno(r, "Failed to retrieve machine ID: %m"); | |
4d680aee ZJS |
2143 | |
2144 | if (sd_id128_equal(machine_id, this_id)) { | |
2145 | log_full(arg_link_journal == LINK_AUTO ? LOG_WARNING : LOG_ERR, | |
2146 | "Host and machine ids are equal (%s): refusing to link journals", id); | |
2147 | if (arg_link_journal == LINK_AUTO) | |
2148 | return 0; | |
df9a75e4 | 2149 | return -EEXIST; |
4d680aee ZJS |
2150 | } |
2151 | ||
2152 | if (arg_link_journal == LINK_NO) | |
2153 | return 0; | |
2154 | ||
03cfe0d5 LP |
2155 | r = userns_mkdir(directory, "/var", 0755, 0, 0); |
2156 | if (r < 0) | |
2157 | return log_error_errno(r, "Failed to create /var: %m"); | |
2158 | ||
2159 | r = userns_mkdir(directory, "/var/log", 0755, 0, 0); | |
2160 | if (r < 0) | |
2161 | return log_error_errno(r, "Failed to create /var/log: %m"); | |
2162 | ||
2163 | r = userns_mkdir(directory, "/var/log/journal", 0755, 0, 0); | |
2164 | if (r < 0) | |
2165 | return log_error_errno(r, "Failed to create /var/log/journal: %m"); | |
2166 | ||
2167 | p = strjoina("/var/log/journal/", id); | |
2168 | q = prefix_roota(directory, p); | |
27407a01 | 2169 | |
e26d6ce5 | 2170 | if (path_is_mount_point(p, 0) > 0) { |
27407a01 ZJS |
2171 | if (arg_link_journal != LINK_AUTO) { |
2172 | log_error("%s: already a mount point, refusing to use for journal", p); | |
2173 | return -EEXIST; | |
2174 | } | |
2175 | ||
2176 | return 0; | |
57fb9fb5 LP |
2177 | } |
2178 | ||
e26d6ce5 | 2179 | if (path_is_mount_point(q, 0) > 0) { |
57fb9fb5 | 2180 | if (arg_link_journal != LINK_AUTO) { |
27407a01 ZJS |
2181 | log_error("%s: already a mount point, refusing to use for journal", q); |
2182 | return -EEXIST; | |
57fb9fb5 LP |
2183 | } |
2184 | ||
27407a01 | 2185 | return 0; |
57fb9fb5 LP |
2186 | } |
2187 | ||
2188 | r = readlink_and_make_absolute(p, &d); | |
2189 | if (r >= 0) { | |
2190 | if ((arg_link_journal == LINK_GUEST || | |
2191 | arg_link_journal == LINK_AUTO) && | |
2192 | path_equal(d, q)) { | |
2193 | ||
03cfe0d5 | 2194 | r = userns_mkdir(directory, p, 0755, 0, 0); |
27407a01 | 2195 | if (r < 0) |
56f64d95 | 2196 | log_warning_errno(errno, "Failed to create directory %s: %m", q); |
27407a01 | 2197 | return 0; |
57fb9fb5 LP |
2198 | } |
2199 | ||
4a62c710 MS |
2200 | if (unlink(p) < 0) |
2201 | return log_error_errno(errno, "Failed to remove symlink %s: %m", p); | |
57fb9fb5 LP |
2202 | } else if (r == -EINVAL) { |
2203 | ||
2204 | if (arg_link_journal == LINK_GUEST && | |
2205 | rmdir(p) < 0) { | |
2206 | ||
27407a01 ZJS |
2207 | if (errno == ENOTDIR) { |
2208 | log_error("%s already exists and is neither a symlink nor a directory", p); | |
2209 | return r; | |
2210 | } else { | |
56f64d95 | 2211 | log_error_errno(errno, "Failed to remove %s: %m", p); |
27407a01 | 2212 | return -errno; |
57fb9fb5 | 2213 | } |
57fb9fb5 LP |
2214 | } |
2215 | } else if (r != -ENOENT) { | |
56f64d95 | 2216 | log_error_errno(errno, "readlink(%s) failed: %m", p); |
27407a01 | 2217 | return r; |
57fb9fb5 LP |
2218 | } |
2219 | ||
2220 | if (arg_link_journal == LINK_GUEST) { | |
2221 | ||
2222 | if (symlink(q, p) < 0) { | |
574edc90 | 2223 | if (arg_link_journal_try) { |
56f64d95 | 2224 | log_debug_errno(errno, "Failed to symlink %s to %s, skipping journal setup: %m", q, p); |
574edc90 MP |
2225 | return 0; |
2226 | } else { | |
56f64d95 | 2227 | log_error_errno(errno, "Failed to symlink %s to %s: %m", q, p); |
574edc90 MP |
2228 | return -errno; |
2229 | } | |
57fb9fb5 LP |
2230 | } |
2231 | ||
03cfe0d5 | 2232 | r = userns_mkdir(directory, p, 0755, 0, 0); |
27407a01 | 2233 | if (r < 0) |
56f64d95 | 2234 | log_warning_errno(errno, "Failed to create directory %s: %m", q); |
27407a01 | 2235 | return 0; |
57fb9fb5 LP |
2236 | } |
2237 | ||
2238 | if (arg_link_journal == LINK_HOST) { | |
574edc90 MP |
2239 | /* don't create parents here -- if the host doesn't have |
2240 | * permanent journal set up, don't force it here */ | |
2241 | r = mkdir(p, 0755); | |
57fb9fb5 | 2242 | if (r < 0) { |
574edc90 | 2243 | if (arg_link_journal_try) { |
56f64d95 | 2244 | log_debug_errno(errno, "Failed to create %s, skipping journal setup: %m", p); |
574edc90 MP |
2245 | return 0; |
2246 | } else { | |
56f64d95 | 2247 | log_error_errno(errno, "Failed to create %s: %m", p); |
574edc90 MP |
2248 | return r; |
2249 | } | |
57fb9fb5 LP |
2250 | } |
2251 | ||
27407a01 ZJS |
2252 | } else if (access(p, F_OK) < 0) |
2253 | return 0; | |
57fb9fb5 | 2254 | |
cdb2b9d0 LP |
2255 | if (dir_is_empty(q) == 0) |
2256 | log_warning("%s is not empty, proceeding anyway.", q); | |
2257 | ||
03cfe0d5 | 2258 | r = userns_mkdir(directory, p, 0755, 0, 0); |
57fb9fb5 | 2259 | if (r < 0) { |
56f64d95 | 2260 | log_error_errno(errno, "Failed to create %s: %m", q); |
27407a01 | 2261 | return r; |
57fb9fb5 LP |
2262 | } |
2263 | ||
4543768d | 2264 | if (mount(p, q, NULL, MS_BIND, NULL) < 0) |
4a62c710 | 2265 | return log_error_errno(errno, "Failed to bind mount journal from host into guest: %m"); |
57fb9fb5 | 2266 | |
27407a01 | 2267 | return 0; |
57fb9fb5 LP |
2268 | } |
2269 | ||
88213476 | 2270 | static int drop_capabilities(void) { |
5076f0cc | 2271 | return capability_bounding_set_drop(~arg_retain, false); |
88213476 LP |
2272 | } |
2273 | ||
5aa4bb6b | 2274 | static int register_machine(pid_t pid, int local_ifindex) { |
9444b1f2 | 2275 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
24996861 | 2276 | _cleanup_bus_close_unref_ sd_bus *bus = NULL; |
9444b1f2 LP |
2277 | int r; |
2278 | ||
eb91eb18 LP |
2279 | if (!arg_register) |
2280 | return 0; | |
2281 | ||
1c03020c | 2282 | r = sd_bus_default_system(&bus); |
f647962d MS |
2283 | if (r < 0) |
2284 | return log_error_errno(r, "Failed to open system bus: %m"); | |
9444b1f2 | 2285 | |
89f7c846 LP |
2286 | if (arg_keep_unit) { |
2287 | r = sd_bus_call_method( | |
2288 | bus, | |
2289 | "org.freedesktop.machine1", | |
2290 | "/org/freedesktop/machine1", | |
2291 | "org.freedesktop.machine1.Manager", | |
5aa4bb6b | 2292 | "RegisterMachineWithNetwork", |
89f7c846 LP |
2293 | &error, |
2294 | NULL, | |
5aa4bb6b | 2295 | "sayssusai", |
89f7c846 LP |
2296 | arg_machine, |
2297 | SD_BUS_MESSAGE_APPEND_ID128(arg_uuid), | |
2298 | "nspawn", | |
2299 | "container", | |
2300 | (uint32_t) pid, | |
5aa4bb6b LP |
2301 | strempty(arg_directory), |
2302 | local_ifindex > 0 ? 1 : 0, local_ifindex); | |
89f7c846 | 2303 | } else { |
9457ac5b | 2304 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
f36933fe | 2305 | char **i; |
ce5b3ad4 | 2306 | unsigned j; |
9457ac5b LP |
2307 | |
2308 | r = sd_bus_message_new_method_call( | |
89f7c846 | 2309 | bus, |
9457ac5b | 2310 | &m, |
89f7c846 LP |
2311 | "org.freedesktop.machine1", |
2312 | "/org/freedesktop/machine1", | |
2313 | "org.freedesktop.machine1.Manager", | |
5aa4bb6b | 2314 | "CreateMachineWithNetwork"); |
f647962d | 2315 | if (r < 0) |
f36933fe | 2316 | return bus_log_create_error(r); |
9457ac5b LP |
2317 | |
2318 | r = sd_bus_message_append( | |
2319 | m, | |
5aa4bb6b | 2320 | "sayssusai", |
89f7c846 LP |
2321 | arg_machine, |
2322 | SD_BUS_MESSAGE_APPEND_ID128(arg_uuid), | |
2323 | "nspawn", | |
2324 | "container", | |
2325 | (uint32_t) pid, | |
5aa4bb6b LP |
2326 | strempty(arg_directory), |
2327 | local_ifindex > 0 ? 1 : 0, local_ifindex); | |
f647962d | 2328 | if (r < 0) |
f36933fe | 2329 | return bus_log_create_error(r); |
9457ac5b LP |
2330 | |
2331 | r = sd_bus_message_open_container(m, 'a', "(sv)"); | |
f647962d | 2332 | if (r < 0) |
f36933fe | 2333 | return bus_log_create_error(r); |
9457ac5b LP |
2334 | |
2335 | if (!isempty(arg_slice)) { | |
2336 | r = sd_bus_message_append(m, "(sv)", "Slice", "s", arg_slice); | |
f647962d | 2337 | if (r < 0) |
f36933fe | 2338 | return bus_log_create_error(r); |
9457ac5b LP |
2339 | } |
2340 | ||
2341 | r = sd_bus_message_append(m, "(sv)", "DevicePolicy", "s", "strict"); | |
f647962d | 2342 | if (r < 0) |
f36933fe | 2343 | return bus_log_create_error(r); |
9457ac5b | 2344 | |
773ce3d8 LP |
2345 | /* If you make changes here, also make sure to update |
2346 | * systemd-nspawn@.service, to keep the device | |
2347 | * policies in sync regardless if we are run with or | |
2348 | * without the --keep-unit switch. */ | |
63cc4c31 | 2349 | r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 9, |
9457ac5b LP |
2350 | /* Allow the container to |
2351 | * access and create the API | |
2352 | * device nodes, so that | |
2353 | * PrivateDevices= in the | |
2354 | * container can work | |
2355 | * fine */ | |
2356 | "/dev/null", "rwm", | |
2357 | "/dev/zero", "rwm", | |
2358 | "/dev/full", "rwm", | |
2359 | "/dev/random", "rwm", | |
2360 | "/dev/urandom", "rwm", | |
2361 | "/dev/tty", "rwm", | |
864e1706 | 2362 | "/dev/net/tun", "rwm", |
9457ac5b LP |
2363 | /* Allow the container |
2364 | * access to ptys. However, | |
2365 | * do not permit the | |
2366 | * container to ever create | |
2367 | * these device nodes. */ | |
2368 | "/dev/pts/ptmx", "rw", | |
63cc4c31 | 2369 | "char-pts", "rw"); |
f647962d | 2370 | if (r < 0) |
27023c0e LP |
2371 | return bus_log_create_error(r); |
2372 | ||
ce5b3ad4 SJ |
2373 | for (j = 0; j < arg_n_custom_mounts; j++) { |
2374 | CustomMount *cm = &arg_custom_mounts[j]; | |
2375 | ||
2376 | if (cm->type != CUSTOM_MOUNT_BIND) | |
2377 | continue; | |
2378 | ||
2379 | r = is_device_node(cm->source); | |
2380 | if (r < 0) | |
2381 | return log_error_errno(r, "Failed to stat %s: %m", cm->source); | |
2382 | ||
2383 | if (r) { | |
2384 | r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 1, | |
2385 | cm->source, cm->read_only ? "r" : "rw"); | |
2386 | if (r < 0) | |
2387 | return log_error_errno(r, "Failed to append message arguments: %m"); | |
2388 | } | |
2389 | } | |
2390 | ||
27023c0e LP |
2391 | if (arg_kill_signal != 0) { |
2392 | r = sd_bus_message_append(m, "(sv)", "KillSignal", "i", arg_kill_signal); | |
2393 | if (r < 0) | |
2394 | return bus_log_create_error(r); | |
2395 | ||
2396 | r = sd_bus_message_append(m, "(sv)", "KillMode", "s", "mixed"); | |
2397 | if (r < 0) | |
2398 | return bus_log_create_error(r); | |
2399 | } | |
9457ac5b | 2400 | |
f36933fe LP |
2401 | STRV_FOREACH(i, arg_property) { |
2402 | r = sd_bus_message_open_container(m, 'r', "sv"); | |
2403 | if (r < 0) | |
2404 | return bus_log_create_error(r); | |
2405 | ||
2406 | r = bus_append_unit_property_assignment(m, *i); | |
2407 | if (r < 0) | |
2408 | return r; | |
2409 | ||
2410 | r = sd_bus_message_close_container(m); | |
2411 | if (r < 0) | |
2412 | return bus_log_create_error(r); | |
2413 | } | |
2414 | ||
9457ac5b | 2415 | r = sd_bus_message_close_container(m); |
f647962d | 2416 | if (r < 0) |
f36933fe | 2417 | return bus_log_create_error(r); |
9457ac5b LP |
2418 | |
2419 | r = sd_bus_call(bus, m, 0, &error, NULL); | |
89f7c846 LP |
2420 | } |
2421 | ||
9444b1f2 | 2422 | if (r < 0) { |
1f0cd86b LP |
2423 | log_error("Failed to register machine: %s", bus_error_message(&error, r)); |
2424 | return r; | |
2425 | } | |
2426 | ||
2427 | return 0; | |
2428 | } | |
2429 | ||
2430 | static int terminate_machine(pid_t pid) { | |
2431 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
2432 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
24996861 | 2433 | _cleanup_bus_close_unref_ sd_bus *bus = NULL; |
1f0cd86b LP |
2434 | const char *path; |
2435 | int r; | |
2436 | ||
eb91eb18 LP |
2437 | if (!arg_register) |
2438 | return 0; | |
2439 | ||
1a2399e5 LP |
2440 | /* If we are reusing the unit, then just exit, systemd will do |
2441 | * the right thing when we exit. */ | |
2442 | if (arg_keep_unit) | |
2443 | return 0; | |
2444 | ||
76b54375 | 2445 | r = sd_bus_default_system(&bus); |
f647962d MS |
2446 | if (r < 0) |
2447 | return log_error_errno(r, "Failed to open system bus: %m"); | |
1f0cd86b LP |
2448 | |
2449 | r = sd_bus_call_method( | |
2450 | bus, | |
2451 | "org.freedesktop.machine1", | |
2452 | "/org/freedesktop/machine1", | |
2453 | "org.freedesktop.machine1.Manager", | |
2454 | "GetMachineByPID", | |
2455 | &error, | |
2456 | &reply, | |
2457 | "u", | |
2458 | (uint32_t) pid); | |
2459 | if (r < 0) { | |
2460 | /* Note that the machine might already have been | |
2461 | * cleaned up automatically, hence don't consider it a | |
2462 | * failure if we cannot get the machine object. */ | |
2463 | log_debug("Failed to get machine: %s", bus_error_message(&error, r)); | |
2464 | return 0; | |
2465 | } | |
2466 | ||
2467 | r = sd_bus_message_read(reply, "o", &path); | |
5b30bef8 LP |
2468 | if (r < 0) |
2469 | return bus_log_parse_error(r); | |
9444b1f2 | 2470 | |
1f0cd86b LP |
2471 | r = sd_bus_call_method( |
2472 | bus, | |
2473 | "org.freedesktop.machine1", | |
2474 | path, | |
2475 | "org.freedesktop.machine1.Machine", | |
2476 | "Terminate", | |
2477 | &error, | |
2478 | NULL, | |
2479 | NULL); | |
2480 | if (r < 0) { | |
2481 | log_debug("Failed to terminate machine: %s", bus_error_message(&error, r)); | |
2482 | return 0; | |
2483 | } | |
2484 | ||
9444b1f2 LP |
2485 | return 0; |
2486 | } | |
2487 | ||
db999e0f LP |
2488 | static int reset_audit_loginuid(void) { |
2489 | _cleanup_free_ char *p = NULL; | |
2490 | int r; | |
2491 | ||
2492 | if (arg_share_system) | |
2493 | return 0; | |
2494 | ||
2495 | r = read_one_line_file("/proc/self/loginuid", &p); | |
13e8ceb8 | 2496 | if (r == -ENOENT) |
db999e0f | 2497 | return 0; |
f647962d MS |
2498 | if (r < 0) |
2499 | return log_error_errno(r, "Failed to read /proc/self/loginuid: %m"); | |
db999e0f LP |
2500 | |
2501 | /* Already reset? */ | |
2502 | if (streq(p, "4294967295")) | |
2503 | return 0; | |
2504 | ||
2505 | r = write_string_file("/proc/self/loginuid", "4294967295"); | |
2506 | if (r < 0) { | |
10a87006 LP |
2507 | log_error_errno(r, |
2508 | "Failed to reset audit login UID. This probably means that your kernel is too\n" | |
2509 | "old and you have audit enabled. Note that the auditing subsystem is known to\n" | |
2510 | "be incompatible with containers on old kernels. Please make sure to upgrade\n" | |
2511 | "your kernel or to off auditing with 'audit=0' on the kernel command line before\n" | |
2512 | "using systemd-nspawn. Sleeping for 5s... (%m)"); | |
77b6e194 | 2513 | |
db999e0f | 2514 | sleep(5); |
77b6e194 | 2515 | } |
db999e0f LP |
2516 | |
2517 | return 0; | |
77b6e194 LP |
2518 | } |
2519 | ||
4f758c23 LP |
2520 | #define HOST_HASH_KEY SD_ID128_MAKE(1a,37,6f,c7,46,ec,45,0b,ad,a3,d5,31,06,60,5d,b1) |
2521 | #define CONTAINER_HASH_KEY SD_ID128_MAKE(c3,c4,f9,19,b5,57,b2,1c,e6,cf,14,27,03,9c,ee,a2) | |
e867ceb6 | 2522 | #define MACVLAN_HASH_KEY SD_ID128_MAKE(00,13,6d,bc,66,83,44,81,bb,0c,f9,51,1f,24,a6,6f) |
01dde061 | 2523 | |
a90e2305 | 2524 | static int generate_mac(struct ether_addr *mac, sd_id128_t hash_key, uint64_t idx) { |
01dde061 TG |
2525 | uint8_t result[8]; |
2526 | size_t l, sz; | |
a90e2305 LP |
2527 | uint8_t *v, *i; |
2528 | int r; | |
01dde061 TG |
2529 | |
2530 | l = strlen(arg_machine); | |
2531 | sz = sizeof(sd_id128_t) + l; | |
e867ceb6 LP |
2532 | if (idx > 0) |
2533 | sz += sizeof(idx); | |
a90e2305 | 2534 | |
01dde061 TG |
2535 | v = alloca(sz); |
2536 | ||
2537 | /* fetch some persistent data unique to the host */ | |
2538 | r = sd_id128_get_machine((sd_id128_t*) v); | |
2539 | if (r < 0) | |
2540 | return r; | |
2541 | ||
2542 | /* combine with some data unique (on this host) to this | |
2543 | * container instance */ | |
a90e2305 LP |
2544 | i = mempcpy(v + sizeof(sd_id128_t), arg_machine, l); |
2545 | if (idx > 0) { | |
2546 | idx = htole64(idx); | |
2547 | memcpy(i, &idx, sizeof(idx)); | |
2548 | } | |
01dde061 TG |
2549 | |
2550 | /* Let's hash the host machine ID plus the container name. We | |
2551 | * use a fixed, but originally randomly created hash key here. */ | |
4f758c23 | 2552 | siphash24(result, v, sz, hash_key.bytes); |
01dde061 TG |
2553 | |
2554 | assert_cc(ETH_ALEN <= sizeof(result)); | |
2555 | memcpy(mac->ether_addr_octet, result, ETH_ALEN); | |
2556 | ||
2557 | /* see eth_random_addr in the kernel */ | |
2558 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
2559 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
2560 | ||
2561 | return 0; | |
2562 | } | |
2563 | ||
5aa4bb6b | 2564 | static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ], int *ifi) { |
1c4baffc TG |
2565 | _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; |
2566 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; | |
4f758c23 | 2567 | struct ether_addr mac_host, mac_container; |
5aa4bb6b | 2568 | int r, i; |
69c79d3c LP |
2569 | |
2570 | if (!arg_private_network) | |
2571 | return 0; | |
2572 | ||
2573 | if (!arg_network_veth) | |
2574 | return 0; | |
2575 | ||
08af0da2 LP |
2576 | /* Use two different interface name prefixes depending whether |
2577 | * we are in bridge mode or not. */ | |
c00524c9 | 2578 | snprintf(iface_name, IFNAMSIZ - 1, "%s-%s", |
4212a337 | 2579 | arg_network_bridge ? "vb" : "ve", arg_machine); |
69c79d3c | 2580 | |
e867ceb6 LP |
2581 | r = generate_mac(&mac_container, CONTAINER_HASH_KEY, 0); |
2582 | if (r < 0) | |
2583 | return log_error_errno(r, "Failed to generate predictable MAC address for container side: %m"); | |
4f758c23 | 2584 | |
e867ceb6 LP |
2585 | r = generate_mac(&mac_host, HOST_HASH_KEY, 0); |
2586 | if (r < 0) | |
2587 | return log_error_errno(r, "Failed to generate predictable MAC address for host side: %m"); | |
01dde061 | 2588 | |
1c4baffc | 2589 | r = sd_netlink_open(&rtnl); |
f647962d MS |
2590 | if (r < 0) |
2591 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
69c79d3c | 2592 | |
151b9b96 | 2593 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); |
f647962d MS |
2594 | if (r < 0) |
2595 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
69c79d3c | 2596 | |
1c4baffc | 2597 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, iface_name); |
f647962d MS |
2598 | if (r < 0) |
2599 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
69c79d3c | 2600 | |
1c4baffc | 2601 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, &mac_host); |
f647962d MS |
2602 | if (r < 0) |
2603 | return log_error_errno(r, "Failed to add netlink MAC address: %m"); | |
4f758c23 | 2604 | |
1c4baffc | 2605 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
f647962d MS |
2606 | if (r < 0) |
2607 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
69c79d3c | 2608 | |
1c4baffc | 2609 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "veth"); |
f647962d MS |
2610 | if (r < 0) |
2611 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
69c79d3c | 2612 | |
1c4baffc | 2613 | r = sd_netlink_message_open_container(m, VETH_INFO_PEER); |
f647962d MS |
2614 | if (r < 0) |
2615 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
69c79d3c | 2616 | |
1c4baffc | 2617 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, "host0"); |
f647962d MS |
2618 | if (r < 0) |
2619 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
01dde061 | 2620 | |
1c4baffc | 2621 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, &mac_container); |
f647962d MS |
2622 | if (r < 0) |
2623 | return log_error_errno(r, "Failed to add netlink MAC address: %m"); | |
69c79d3c | 2624 | |
1c4baffc | 2625 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); |
f647962d MS |
2626 | if (r < 0) |
2627 | return log_error_errno(r, "Failed to add netlink namespace field: %m"); | |
69c79d3c | 2628 | |
1c4baffc | 2629 | r = sd_netlink_message_close_container(m); |
f647962d MS |
2630 | if (r < 0) |
2631 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
69c79d3c | 2632 | |
1c4baffc | 2633 | r = sd_netlink_message_close_container(m); |
f647962d MS |
2634 | if (r < 0) |
2635 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
69c79d3c | 2636 | |
1c4baffc | 2637 | r = sd_netlink_message_close_container(m); |
f647962d MS |
2638 | if (r < 0) |
2639 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
69c79d3c | 2640 | |
1c4baffc | 2641 | r = sd_netlink_call(rtnl, m, 0, NULL); |
f647962d | 2642 | if (r < 0) |
637aa8a3 | 2643 | return log_error_errno(r, "Failed to add new veth interfaces (host0, %s): %m", iface_name); |
69c79d3c | 2644 | |
5aa4bb6b | 2645 | i = (int) if_nametoindex(iface_name); |
4a62c710 MS |
2646 | if (i <= 0) |
2647 | return log_error_errno(errno, "Failed to resolve interface %s: %m", iface_name); | |
5aa4bb6b LP |
2648 | |
2649 | *ifi = i; | |
2650 | ||
69c79d3c LP |
2651 | return 0; |
2652 | } | |
2653 | ||
5aa4bb6b | 2654 | static int setup_bridge(const char veth_name[], int *ifi) { |
1c4baffc TG |
2655 | _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; |
2656 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; | |
ab046dde TG |
2657 | int r, bridge; |
2658 | ||
2659 | if (!arg_private_network) | |
2660 | return 0; | |
2661 | ||
2662 | if (!arg_network_veth) | |
2663 | return 0; | |
2664 | ||
2665 | if (!arg_network_bridge) | |
2666 | return 0; | |
2667 | ||
2668 | bridge = (int) if_nametoindex(arg_network_bridge); | |
4a62c710 MS |
2669 | if (bridge <= 0) |
2670 | return log_error_errno(errno, "Failed to resolve interface %s: %m", arg_network_bridge); | |
ab046dde | 2671 | |
5aa4bb6b LP |
2672 | *ifi = bridge; |
2673 | ||
1c4baffc | 2674 | r = sd_netlink_open(&rtnl); |
f647962d MS |
2675 | if (r < 0) |
2676 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
ab046dde | 2677 | |
151b9b96 | 2678 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, 0); |
f647962d MS |
2679 | if (r < 0) |
2680 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
ab046dde | 2681 | |
039dd4af | 2682 | r = sd_rtnl_message_link_set_flags(m, IFF_UP, IFF_UP); |
f647962d MS |
2683 | if (r < 0) |
2684 | return log_error_errno(r, "Failed to set IFF_UP flag: %m"); | |
039dd4af | 2685 | |
1c4baffc | 2686 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, veth_name); |
f647962d MS |
2687 | if (r < 0) |
2688 | return log_error_errno(r, "Failed to add netlink interface name field: %m"); | |
ab046dde | 2689 | |
1c4baffc | 2690 | r = sd_netlink_message_append_u32(m, IFLA_MASTER, bridge); |
f647962d MS |
2691 | if (r < 0) |
2692 | return log_error_errno(r, "Failed to add netlink master field: %m"); | |
ab046dde | 2693 | |
1c4baffc | 2694 | r = sd_netlink_call(rtnl, m, 0, NULL); |
f647962d MS |
2695 | if (r < 0) |
2696 | return log_error_errno(r, "Failed to add veth interface to bridge: %m"); | |
ab046dde TG |
2697 | |
2698 | return 0; | |
2699 | } | |
2700 | ||
c74e630d LP |
2701 | static int parse_interface(struct udev *udev, const char *name) { |
2702 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
2703 | char ifi_str[2 + DECIMAL_STR_MAX(int)]; | |
2704 | int ifi; | |
2705 | ||
2706 | ifi = (int) if_nametoindex(name); | |
4a62c710 MS |
2707 | if (ifi <= 0) |
2708 | return log_error_errno(errno, "Failed to resolve interface %s: %m", name); | |
c74e630d LP |
2709 | |
2710 | sprintf(ifi_str, "n%i", ifi); | |
2711 | d = udev_device_new_from_device_id(udev, ifi_str); | |
4a62c710 MS |
2712 | if (!d) |
2713 | return log_error_errno(errno, "Failed to get udev device for interface %s: %m", name); | |
c74e630d LP |
2714 | |
2715 | if (udev_device_get_is_initialized(d) <= 0) { | |
2716 | log_error("Network interface %s is not initialized yet.", name); | |
2717 | return -EBUSY; | |
2718 | } | |
2719 | ||
2720 | return ifi; | |
2721 | } | |
2722 | ||
69c79d3c | 2723 | static int move_network_interfaces(pid_t pid) { |
7e227024 | 2724 | _cleanup_udev_unref_ struct udev *udev = NULL; |
1c4baffc | 2725 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; |
aa28aefe LP |
2726 | char **i; |
2727 | int r; | |
2728 | ||
2729 | if (!arg_private_network) | |
2730 | return 0; | |
2731 | ||
2732 | if (strv_isempty(arg_network_interfaces)) | |
2733 | return 0; | |
2734 | ||
1c4baffc | 2735 | r = sd_netlink_open(&rtnl); |
f647962d MS |
2736 | if (r < 0) |
2737 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
aa28aefe | 2738 | |
7e227024 LP |
2739 | udev = udev_new(); |
2740 | if (!udev) { | |
2741 | log_error("Failed to connect to udev."); | |
2742 | return -ENOMEM; | |
2743 | } | |
2744 | ||
aa28aefe | 2745 | STRV_FOREACH(i, arg_network_interfaces) { |
1c4baffc | 2746 | _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; |
b88eb17a | 2747 | int ifi; |
aa28aefe | 2748 | |
c74e630d LP |
2749 | ifi = parse_interface(udev, *i); |
2750 | if (ifi < 0) | |
2751 | return ifi; | |
2752 | ||
3125b3ef | 2753 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, ifi); |
f647962d MS |
2754 | if (r < 0) |
2755 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
aa28aefe | 2756 | |
1c4baffc | 2757 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); |
f647962d MS |
2758 | if (r < 0) |
2759 | return log_error_errno(r, "Failed to append namespace PID to netlink message: %m"); | |
7e227024 | 2760 | |
1c4baffc | 2761 | r = sd_netlink_call(rtnl, m, 0, NULL); |
f647962d MS |
2762 | if (r < 0) |
2763 | return log_error_errno(r, "Failed to move interface %s to namespace: %m", *i); | |
c74e630d | 2764 | } |
7e227024 | 2765 | |
c74e630d LP |
2766 | return 0; |
2767 | } | |
2768 | ||
2769 | static int setup_macvlan(pid_t pid) { | |
2770 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
1c4baffc | 2771 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; |
e867ceb6 | 2772 | unsigned idx = 0; |
c74e630d LP |
2773 | char **i; |
2774 | int r; | |
2775 | ||
2776 | if (!arg_private_network) | |
2777 | return 0; | |
2778 | ||
2779 | if (strv_isempty(arg_network_macvlan)) | |
2780 | return 0; | |
2781 | ||
1c4baffc | 2782 | r = sd_netlink_open(&rtnl); |
f647962d MS |
2783 | if (r < 0) |
2784 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
c74e630d LP |
2785 | |
2786 | udev = udev_new(); | |
2787 | if (!udev) { | |
2788 | log_error("Failed to connect to udev."); | |
2789 | return -ENOMEM; | |
2790 | } | |
2791 | ||
2792 | STRV_FOREACH(i, arg_network_macvlan) { | |
1c4baffc | 2793 | _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; |
c74e630d | 2794 | _cleanup_free_ char *n = NULL; |
e867ceb6 | 2795 | struct ether_addr mac; |
c74e630d LP |
2796 | int ifi; |
2797 | ||
2798 | ifi = parse_interface(udev, *i); | |
2799 | if (ifi < 0) | |
2800 | return ifi; | |
2801 | ||
e867ceb6 LP |
2802 | r = generate_mac(&mac, MACVLAN_HASH_KEY, idx++); |
2803 | if (r < 0) | |
2804 | return log_error_errno(r, "Failed to create MACVLAN MAC address: %m"); | |
2805 | ||
c74e630d | 2806 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); |
f647962d MS |
2807 | if (r < 0) |
2808 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
aa28aefe | 2809 | |
1c4baffc | 2810 | r = sd_netlink_message_append_u32(m, IFLA_LINK, ifi); |
f647962d MS |
2811 | if (r < 0) |
2812 | return log_error_errno(r, "Failed to add netlink interface index: %m"); | |
c74e630d LP |
2813 | |
2814 | n = strappend("mv-", *i); | |
2815 | if (!n) | |
2816 | return log_oom(); | |
2817 | ||
2818 | strshorten(n, IFNAMSIZ-1); | |
2819 | ||
1c4baffc | 2820 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, n); |
f647962d MS |
2821 | if (r < 0) |
2822 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
c74e630d | 2823 | |
1c4baffc | 2824 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, &mac); |
e867ceb6 LP |
2825 | if (r < 0) |
2826 | return log_error_errno(r, "Failed to add netlink MAC address: %m"); | |
2827 | ||
1c4baffc | 2828 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); |
f647962d MS |
2829 | if (r < 0) |
2830 | return log_error_errno(r, "Failed to add netlink namespace field: %m"); | |
c74e630d | 2831 | |
1c4baffc | 2832 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
f647962d MS |
2833 | if (r < 0) |
2834 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
c74e630d | 2835 | |
1c4baffc | 2836 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "macvlan"); |
f647962d MS |
2837 | if (r < 0) |
2838 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
c74e630d | 2839 | |
1c4baffc | 2840 | r = sd_netlink_message_append_u32(m, IFLA_MACVLAN_MODE, MACVLAN_MODE_BRIDGE); |
f647962d MS |
2841 | if (r < 0) |
2842 | return log_error_errno(r, "Failed to append macvlan mode: %m"); | |
c74e630d | 2843 | |
1c4baffc | 2844 | r = sd_netlink_message_close_container(m); |
f647962d MS |
2845 | if (r < 0) |
2846 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
c74e630d | 2847 | |
1c4baffc | 2848 | r = sd_netlink_message_close_container(m); |
f647962d MS |
2849 | if (r < 0) |
2850 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
aa28aefe | 2851 | |
1c4baffc | 2852 | r = sd_netlink_call(rtnl, m, 0, NULL); |
f647962d MS |
2853 | if (r < 0) |
2854 | return log_error_errno(r, "Failed to add new macvlan interfaces: %m"); | |
aa28aefe LP |
2855 | } |
2856 | ||
2857 | return 0; | |
2858 | } | |
2859 | ||
4bbfe7ad TG |
2860 | static int setup_ipvlan(pid_t pid) { |
2861 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
1c4baffc | 2862 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; |
4bbfe7ad TG |
2863 | char **i; |
2864 | int r; | |
2865 | ||
2866 | if (!arg_private_network) | |
2867 | return 0; | |
2868 | ||
2869 | if (strv_isempty(arg_network_ipvlan)) | |
2870 | return 0; | |
2871 | ||
1c4baffc | 2872 | r = sd_netlink_open(&rtnl); |
4bbfe7ad TG |
2873 | if (r < 0) |
2874 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
2875 | ||
2876 | udev = udev_new(); | |
2877 | if (!udev) { | |
2878 | log_error("Failed to connect to udev."); | |
2879 | return -ENOMEM; | |
2880 | } | |
2881 | ||
2882 | STRV_FOREACH(i, arg_network_ipvlan) { | |
1c4baffc | 2883 | _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; |
4bbfe7ad TG |
2884 | _cleanup_free_ char *n = NULL; |
2885 | int ifi; | |
2886 | ||
2887 | ifi = parse_interface(udev, *i); | |
2888 | if (ifi < 0) | |
2889 | return ifi; | |
2890 | ||
2891 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); | |
2892 | if (r < 0) | |
2893 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
2894 | ||
1c4baffc | 2895 | r = sd_netlink_message_append_u32(m, IFLA_LINK, ifi); |
4bbfe7ad TG |
2896 | if (r < 0) |
2897 | return log_error_errno(r, "Failed to add netlink interface index: %m"); | |
2898 | ||
2899 | n = strappend("iv-", *i); | |
2900 | if (!n) | |
2901 | return log_oom(); | |
2902 | ||
2903 | strshorten(n, IFNAMSIZ-1); | |
2904 | ||
1c4baffc | 2905 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, n); |
4bbfe7ad TG |
2906 | if (r < 0) |
2907 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
2908 | ||
1c4baffc | 2909 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); |
4bbfe7ad TG |
2910 | if (r < 0) |
2911 | return log_error_errno(r, "Failed to add netlink namespace field: %m"); | |
2912 | ||
1c4baffc | 2913 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
4bbfe7ad TG |
2914 | if (r < 0) |
2915 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
2916 | ||
1c4baffc | 2917 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "ipvlan"); |
4bbfe7ad TG |
2918 | if (r < 0) |
2919 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
2920 | ||
1c4baffc | 2921 | r = sd_netlink_message_append_u16(m, IFLA_IPVLAN_MODE, IPVLAN_MODE_L2); |
4bbfe7ad TG |
2922 | if (r < 0) |
2923 | return log_error_errno(r, "Failed to add ipvlan mode: %m"); | |
2924 | ||
1c4baffc | 2925 | r = sd_netlink_message_close_container(m); |
4bbfe7ad TG |
2926 | if (r < 0) |
2927 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
2928 | ||
1c4baffc | 2929 | r = sd_netlink_message_close_container(m); |
4bbfe7ad TG |
2930 | if (r < 0) |
2931 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
2932 | ||
1c4baffc | 2933 | r = sd_netlink_call(rtnl, m, 0, NULL); |
4bbfe7ad TG |
2934 | if (r < 0) |
2935 | return log_error_errno(r, "Failed to add new ipvlan interfaces: %m"); | |
2936 | } | |
2937 | ||
2938 | return 0; | |
2939 | } | |
2940 | ||
28650077 | 2941 | static int setup_seccomp(void) { |
24fb1112 LP |
2942 | |
2943 | #ifdef HAVE_SECCOMP | |
9a71b112 JF |
2944 | static const struct { |
2945 | uint64_t capability; | |
2946 | int syscall_num; | |
2947 | } blacklist[] = { | |
5ba7a268 LP |
2948 | { CAP_SYS_RAWIO, SCMP_SYS(iopl) }, |
2949 | { CAP_SYS_RAWIO, SCMP_SYS(ioperm) }, | |
2950 | { CAP_SYS_BOOT, SCMP_SYS(kexec_load) }, | |
2951 | { CAP_SYS_ADMIN, SCMP_SYS(swapon) }, | |
2952 | { CAP_SYS_ADMIN, SCMP_SYS(swapoff) }, | |
2953 | { CAP_SYS_ADMIN, SCMP_SYS(open_by_handle_at) }, | |
2954 | { CAP_SYS_MODULE, SCMP_SYS(init_module) }, | |
2955 | { CAP_SYS_MODULE, SCMP_SYS(finit_module) }, | |
2956 | { CAP_SYS_MODULE, SCMP_SYS(delete_module) }, | |
2957 | { CAP_SYSLOG, SCMP_SYS(syslog) }, | |
d0a0ccf3 JF |
2958 | }; |
2959 | ||
24fb1112 | 2960 | scmp_filter_ctx seccomp; |
28650077 | 2961 | unsigned i; |
24fb1112 LP |
2962 | int r; |
2963 | ||
24fb1112 LP |
2964 | seccomp = seccomp_init(SCMP_ACT_ALLOW); |
2965 | if (!seccomp) | |
2966 | return log_oom(); | |
2967 | ||
e9642be2 | 2968 | r = seccomp_add_secondary_archs(seccomp); |
9875fd78 | 2969 | if (r < 0) { |
da927ba9 | 2970 | log_error_errno(r, "Failed to add secondary archs to seccomp filter: %m"); |
e9642be2 LP |
2971 | goto finish; |
2972 | } | |
2973 | ||
28650077 | 2974 | for (i = 0; i < ELEMENTSOF(blacklist); i++) { |
9a71b112 JF |
2975 | if (arg_retain & (1ULL << blacklist[i].capability)) |
2976 | continue; | |
2977 | ||
2978 | r = seccomp_rule_add(seccomp, SCMP_ACT_ERRNO(EPERM), blacklist[i].syscall_num, 0); | |
28650077 LP |
2979 | if (r == -EFAULT) |
2980 | continue; /* unknown syscall */ | |
2981 | if (r < 0) { | |
da927ba9 | 2982 | log_error_errno(r, "Failed to block syscall: %m"); |
28650077 LP |
2983 | goto finish; |
2984 | } | |
2985 | } | |
2986 | ||
d0a0ccf3 | 2987 | |
28650077 LP |
2988 | /* |
2989 | Audit is broken in containers, much of the userspace audit | |
2990 | hookup will fail if running inside a container. We don't | |
2991 | care and just turn off creation of audit sockets. | |
2992 | ||
2993 | This will make socket(AF_NETLINK, *, NETLINK_AUDIT) fail | |
2994 | with EAFNOSUPPORT which audit userspace uses as indication | |
2995 | that audit is disabled in the kernel. | |
2996 | */ | |
2997 | ||
3302da46 | 2998 | r = seccomp_rule_add( |
24fb1112 LP |
2999 | seccomp, |
3000 | SCMP_ACT_ERRNO(EAFNOSUPPORT), | |
3001 | SCMP_SYS(socket), | |
3002 | 2, | |
3003 | SCMP_A0(SCMP_CMP_EQ, AF_NETLINK), | |
3004 | SCMP_A2(SCMP_CMP_EQ, NETLINK_AUDIT)); | |
3005 | if (r < 0) { | |
da927ba9 | 3006 | log_error_errno(r, "Failed to add audit seccomp rule: %m"); |
24fb1112 LP |
3007 | goto finish; |
3008 | } | |
3009 | ||
3010 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
3011 | if (r < 0) { | |
da927ba9 | 3012 | log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m"); |
24fb1112 LP |
3013 | goto finish; |
3014 | } | |
3015 | ||
3016 | r = seccomp_load(seccomp); | |
9b1cbdc6 ILG |
3017 | if (r == -EINVAL) { |
3018 | log_debug_errno(r, "Kernel is probably not configured with CONFIG_SECCOMP. Disabling seccomp audit filter: %m"); | |
3019 | r = 0; | |
3020 | goto finish; | |
3021 | } | |
3022 | if (r < 0) { | |
da927ba9 | 3023 | log_error_errno(r, "Failed to install seccomp audit filter: %m"); |
9b1cbdc6 ILG |
3024 | goto finish; |
3025 | } | |
24fb1112 LP |
3026 | |
3027 | finish: | |
3028 | seccomp_release(seccomp); | |
3029 | return r; | |
3030 | #else | |
3031 | return 0; | |
3032 | #endif | |
3033 | ||
3034 | } | |
3035 | ||
785890ac LP |
3036 | static int setup_propagate(const char *root) { |
3037 | const char *p, *q; | |
3038 | ||
3039 | (void) mkdir_p("/run/systemd/nspawn/", 0755); | |
3040 | (void) mkdir_p("/run/systemd/nspawn/propagate", 0600); | |
63c372cb | 3041 | p = strjoina("/run/systemd/nspawn/propagate/", arg_machine); |
785890ac LP |
3042 | (void) mkdir_p(p, 0600); |
3043 | ||
03cfe0d5 LP |
3044 | if (userns_mkdir(root, "/run/systemd", 0755, 0, 0) < 0) |
3045 | return log_error_errno(errno, "Failed to create /run/systemd: %m"); | |
3046 | ||
3047 | if (userns_mkdir(root, "/run/systemd/nspawn", 0755, 0, 0) < 0) | |
3048 | return log_error_errno(errno, "Failed to create /run/systemd/nspawn: %m"); | |
3049 | ||
3050 | if (userns_mkdir(root, "/run/systemd/nspawn/incoming", 0600, 0, 0) < 0) | |
3051 | return log_error_errno(errno, "Failed to create /run/systemd/nspawn/incoming: %m"); | |
785890ac | 3052 | |
03cfe0d5 | 3053 | q = prefix_roota(root, "/run/systemd/nspawn/incoming"); |
785890ac LP |
3054 | if (mount(p, q, NULL, MS_BIND, NULL) < 0) |
3055 | return log_error_errno(errno, "Failed to install propagation bind mount."); | |
3056 | ||
3057 | if (mount(NULL, q, NULL, MS_BIND|MS_REMOUNT|MS_RDONLY, NULL) < 0) | |
3058 | return log_error_errno(errno, "Failed to make propagation mount read-only"); | |
3059 | ||
3060 | return 0; | |
3061 | } | |
3062 | ||
1b9e5b12 LP |
3063 | static int setup_image(char **device_path, int *loop_nr) { |
3064 | struct loop_info64 info = { | |
3065 | .lo_flags = LO_FLAGS_AUTOCLEAR|LO_FLAGS_PARTSCAN | |
3066 | }; | |
3067 | _cleanup_close_ int fd = -1, control = -1, loop = -1; | |
3068 | _cleanup_free_ char* loopdev = NULL; | |
3069 | struct stat st; | |
3070 | int r, nr; | |
3071 | ||
3072 | assert(device_path); | |
3073 | assert(loop_nr); | |
ec16945e | 3074 | assert(arg_image); |
1b9e5b12 LP |
3075 | |
3076 | fd = open(arg_image, O_CLOEXEC|(arg_read_only ? O_RDONLY : O_RDWR)|O_NONBLOCK|O_NOCTTY); | |
4a62c710 MS |
3077 | if (fd < 0) |
3078 | return log_error_errno(errno, "Failed to open %s: %m", arg_image); | |
1b9e5b12 | 3079 | |
4a62c710 MS |
3080 | if (fstat(fd, &st) < 0) |
3081 | return log_error_errno(errno, "Failed to stat %s: %m", arg_image); | |
1b9e5b12 LP |
3082 | |
3083 | if (S_ISBLK(st.st_mode)) { | |
3084 | char *p; | |
3085 | ||
3086 | p = strdup(arg_image); | |
3087 | if (!p) | |
3088 | return log_oom(); | |
3089 | ||
3090 | *device_path = p; | |
3091 | ||
3092 | *loop_nr = -1; | |
3093 | ||
3094 | r = fd; | |
3095 | fd = -1; | |
3096 | ||
3097 | return r; | |
3098 | } | |
3099 | ||
3100 | if (!S_ISREG(st.st_mode)) { | |
56f64d95 | 3101 | log_error_errno(errno, "%s is not a regular file or block device: %m", arg_image); |
1b9e5b12 LP |
3102 | return -EINVAL; |
3103 | } | |
3104 | ||
3105 | control = open("/dev/loop-control", O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); | |
4a62c710 MS |
3106 | if (control < 0) |
3107 | return log_error_errno(errno, "Failed to open /dev/loop-control: %m"); | |
1b9e5b12 LP |
3108 | |
3109 | nr = ioctl(control, LOOP_CTL_GET_FREE); | |
4a62c710 MS |
3110 | if (nr < 0) |
3111 | return log_error_errno(errno, "Failed to allocate loop device: %m"); | |
1b9e5b12 LP |
3112 | |
3113 | if (asprintf(&loopdev, "/dev/loop%i", nr) < 0) | |
3114 | return log_oom(); | |
3115 | ||
3116 | loop = open(loopdev, O_CLOEXEC|(arg_read_only ? O_RDONLY : O_RDWR)|O_NONBLOCK|O_NOCTTY); | |
4a62c710 MS |
3117 | if (loop < 0) |
3118 | return log_error_errno(errno, "Failed to open loop device %s: %m", loopdev); | |
1b9e5b12 | 3119 | |
4a62c710 MS |
3120 | if (ioctl(loop, LOOP_SET_FD, fd) < 0) |
3121 | return log_error_errno(errno, "Failed to set loopback file descriptor on %s: %m", loopdev); | |
1b9e5b12 LP |
3122 | |
3123 | if (arg_read_only) | |
3124 | info.lo_flags |= LO_FLAGS_READ_ONLY; | |
3125 | ||
4a62c710 MS |
3126 | if (ioctl(loop, LOOP_SET_STATUS64, &info) < 0) |
3127 | return log_error_errno(errno, "Failed to set loopback settings on %s: %m", loopdev); | |
1b9e5b12 LP |
3128 | |
3129 | *device_path = loopdev; | |
3130 | loopdev = NULL; | |
3131 | ||
3132 | *loop_nr = nr; | |
3133 | ||
3134 | r = loop; | |
3135 | loop = -1; | |
3136 | ||
3137 | return r; | |
3138 | } | |
3139 | ||
ada4799a LP |
3140 | #define PARTITION_TABLE_BLURB \ |
3141 | "Note that the disk image needs to either contain only a single MBR partition of\n" \ | |
4aab5d0c | 3142 | "type 0x83 that is marked bootable, or a single GPT partition of type " \ |
f6c51a81 | 3143 | "0FC63DAF-8483-4772-8E79-3D69D8477DE4 or follow\n" \ |
ada4799a LP |
3144 | " http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/\n" \ |
3145 | "to be bootable with systemd-nspawn." | |
3146 | ||
1b9e5b12 LP |
3147 | static int dissect_image( |
3148 | int fd, | |
727fd4fd LP |
3149 | char **root_device, bool *root_device_rw, |
3150 | char **home_device, bool *home_device_rw, | |
3151 | char **srv_device, bool *srv_device_rw, | |
1b9e5b12 LP |
3152 | bool *secondary) { |
3153 | ||
3154 | #ifdef HAVE_BLKID | |
01dc33ce ZJS |
3155 | int home_nr = -1, srv_nr = -1; |
3156 | #ifdef GPT_ROOT_NATIVE | |
3157 | int root_nr = -1; | |
3158 | #endif | |
3159 | #ifdef GPT_ROOT_SECONDARY | |
3160 | int secondary_root_nr = -1; | |
3161 | #endif | |
f6c51a81 | 3162 | _cleanup_free_ char *home = NULL, *root = NULL, *secondary_root = NULL, *srv = NULL, *generic = NULL; |
1b9e5b12 LP |
3163 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; |
3164 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
3165 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; | |
3166 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
3167 | struct udev_list_entry *first, *item; | |
f6c51a81 | 3168 | bool home_rw = true, root_rw = true, secondary_root_rw = true, srv_rw = true, generic_rw = true; |
c09ef2e4 | 3169 | bool is_gpt, is_mbr, multiple_generic = false; |
1b9e5b12 LP |
3170 | const char *pttype = NULL; |
3171 | blkid_partlist pl; | |
3172 | struct stat st; | |
c09ef2e4 | 3173 | unsigned i; |
1b9e5b12 LP |
3174 | int r; |
3175 | ||
3176 | assert(fd >= 0); | |
3177 | assert(root_device); | |
3178 | assert(home_device); | |
3179 | assert(srv_device); | |
3180 | assert(secondary); | |
ec16945e | 3181 | assert(arg_image); |
1b9e5b12 LP |
3182 | |
3183 | b = blkid_new_probe(); | |
3184 | if (!b) | |
3185 | return log_oom(); | |
3186 | ||
3187 | errno = 0; | |
3188 | r = blkid_probe_set_device(b, fd, 0, 0); | |
3189 | if (r != 0) { | |
3190 | if (errno == 0) | |
3191 | return log_oom(); | |
3192 | ||
56f64d95 | 3193 | log_error_errno(errno, "Failed to set device on blkid probe: %m"); |
1b9e5b12 LP |
3194 | return -errno; |
3195 | } | |
3196 | ||
3197 | blkid_probe_enable_partitions(b, 1); | |
3198 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
3199 | ||
3200 | errno = 0; | |
3201 | r = blkid_do_safeprobe(b); | |
3202 | if (r == -2 || r == 1) { | |
ada4799a LP |
3203 | log_error("Failed to identify any partition table on\n" |
3204 | " %s\n" | |
3205 | PARTITION_TABLE_BLURB, arg_image); | |
1b9e5b12 LP |
3206 | return -EINVAL; |
3207 | } else if (r != 0) { | |
3208 | if (errno == 0) | |
3209 | errno = EIO; | |
56f64d95 | 3210 | log_error_errno(errno, "Failed to probe: %m"); |
1b9e5b12 LP |
3211 | return -errno; |
3212 | } | |
3213 | ||
48861960 | 3214 | (void) blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); |
ada4799a LP |
3215 | |
3216 | is_gpt = streq_ptr(pttype, "gpt"); | |
3217 | is_mbr = streq_ptr(pttype, "dos"); | |
3218 | ||
3219 | if (!is_gpt && !is_mbr) { | |
3220 | log_error("No GPT or MBR partition table discovered on\n" | |
3221 | " %s\n" | |
3222 | PARTITION_TABLE_BLURB, arg_image); | |
1b9e5b12 LP |
3223 | return -EINVAL; |
3224 | } | |
3225 | ||
3226 | errno = 0; | |
3227 | pl = blkid_probe_get_partitions(b); | |
3228 | if (!pl) { | |
3229 | if (errno == 0) | |
3230 | return log_oom(); | |
3231 | ||
3232 | log_error("Failed to list partitions of %s", arg_image); | |
3233 | return -errno; | |
3234 | } | |
3235 | ||
3236 | udev = udev_new(); | |
3237 | if (!udev) | |
3238 | return log_oom(); | |
3239 | ||
4a62c710 MS |
3240 | if (fstat(fd, &st) < 0) |
3241 | return log_error_errno(errno, "Failed to stat block device: %m"); | |
1b9e5b12 | 3242 | |
c09ef2e4 LP |
3243 | d = udev_device_new_from_devnum(udev, 'b', st.st_rdev); |
3244 | if (!d) | |
1b9e5b12 LP |
3245 | return log_oom(); |
3246 | ||
c09ef2e4 LP |
3247 | for (i = 0;; i++) { |
3248 | int n, m; | |
1b9e5b12 | 3249 | |
c09ef2e4 LP |
3250 | if (i >= 10) { |
3251 | log_error("Kernel partitions never appeared."); | |
3252 | return -ENXIO; | |
3253 | } | |
3254 | ||
3255 | e = udev_enumerate_new(udev); | |
3256 | if (!e) | |
3257 | return log_oom(); | |
3258 | ||
3259 | r = udev_enumerate_add_match_parent(e, d); | |
3260 | if (r < 0) | |
3261 | return log_oom(); | |
3262 | ||
3263 | r = udev_enumerate_scan_devices(e); | |
3264 | if (r < 0) | |
3265 | return log_error_errno(r, "Failed to scan for partition devices of %s: %m", arg_image); | |
3266 | ||
3267 | /* Count the partitions enumerated by the kernel */ | |
3268 | n = 0; | |
3269 | first = udev_enumerate_get_list_entry(e); | |
3270 | udev_list_entry_foreach(item, first) | |
3271 | n++; | |
3272 | ||
3273 | /* Count the partitions enumerated by blkid */ | |
3274 | m = blkid_partlist_numof_partitions(pl); | |
3275 | if (n == m + 1) | |
3276 | break; | |
3277 | if (n > m + 1) { | |
3278 | log_error("blkid and kernel partition list do not match."); | |
3279 | return -EIO; | |
3280 | } | |
3281 | if (n < m + 1) { | |
3282 | unsigned j; | |
3283 | ||
3284 | /* The kernel has probed fewer partitions than | |
3285 | * blkid? Maybe the kernel prober is still | |
3286 | * running or it got EBUSY because udev | |
3287 | * already opened the device. Let's reprobe | |
3288 | * the device, which is a synchronous call | |
3289 | * that waits until probing is complete. */ | |
3290 | ||
3291 | for (j = 0; j < 20; j++) { | |
3292 | ||
3293 | r = ioctl(fd, BLKRRPART, 0); | |
3294 | if (r < 0) | |
3295 | r = -errno; | |
3296 | if (r >= 0 || r != -EBUSY) | |
3297 | break; | |
3298 | ||
3299 | /* If something else has the device | |
3300 | * open, such as an udev rule, the | |
3301 | * ioctl will return EBUSY. Since | |
3302 | * there's no way to wait until it | |
3303 | * isn't busy anymore, let's just wait | |
3304 | * a bit, and try again. | |
3305 | * | |
3306 | * This is really something they | |
3307 | * should fix in the kernel! */ | |
3308 | ||
3309 | usleep(50 * USEC_PER_MSEC); | |
3310 | } | |
3311 | ||
3312 | if (r < 0) | |
3313 | return log_error_errno(r, "Failed to reread partition table: %m"); | |
3314 | } | |
3315 | ||
3316 | e = udev_enumerate_unref(e); | |
3317 | } | |
1b9e5b12 LP |
3318 | |
3319 | first = udev_enumerate_get_list_entry(e); | |
3320 | udev_list_entry_foreach(item, first) { | |
3321 | _cleanup_udev_device_unref_ struct udev_device *q; | |
ada4799a | 3322 | const char *node; |
727fd4fd | 3323 | unsigned long long flags; |
1b9e5b12 LP |
3324 | blkid_partition pp; |
3325 | dev_t qn; | |
3326 | int nr; | |
3327 | ||
3328 | errno = 0; | |
3329 | q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); | |
3330 | if (!q) { | |
3331 | if (!errno) | |
3332 | errno = ENOMEM; | |
3333 | ||
56f64d95 | 3334 | log_error_errno(errno, "Failed to get partition device of %s: %m", arg_image); |
1b9e5b12 LP |
3335 | return -errno; |
3336 | } | |
3337 | ||
3338 | qn = udev_device_get_devnum(q); | |
3339 | if (major(qn) == 0) | |
3340 | continue; | |
3341 | ||
3342 | if (st.st_rdev == qn) | |
3343 | continue; | |
3344 | ||
3345 | node = udev_device_get_devnode(q); | |
3346 | if (!node) | |
3347 | continue; | |
3348 | ||
3349 | pp = blkid_partlist_devno_to_partition(pl, qn); | |
3350 | if (!pp) | |
3351 | continue; | |
3352 | ||
727fd4fd | 3353 | flags = blkid_partition_get_flags(pp); |
727fd4fd | 3354 | |
1b9e5b12 LP |
3355 | nr = blkid_partition_get_partno(pp); |
3356 | if (nr < 0) | |
3357 | continue; | |
3358 | ||
ada4799a LP |
3359 | if (is_gpt) { |
3360 | sd_id128_t type_id; | |
3361 | const char *stype; | |
1b9e5b12 | 3362 | |
f6c51a81 LP |
3363 | if (flags & GPT_FLAG_NO_AUTO) |
3364 | continue; | |
3365 | ||
ada4799a LP |
3366 | stype = blkid_partition_get_type_string(pp); |
3367 | if (!stype) | |
3368 | continue; | |
1b9e5b12 | 3369 | |
ada4799a | 3370 | if (sd_id128_from_string(stype, &type_id) < 0) |
1b9e5b12 LP |
3371 | continue; |
3372 | ||
ada4799a | 3373 | if (sd_id128_equal(type_id, GPT_HOME)) { |
727fd4fd | 3374 | |
ada4799a LP |
3375 | if (home && nr >= home_nr) |
3376 | continue; | |
1b9e5b12 | 3377 | |
ada4799a LP |
3378 | home_nr = nr; |
3379 | home_rw = !(flags & GPT_FLAG_READ_ONLY); | |
1b9e5b12 | 3380 | |
ada4799a LP |
3381 | r = free_and_strdup(&home, node); |
3382 | if (r < 0) | |
3383 | return log_oom(); | |
727fd4fd | 3384 | |
ada4799a LP |
3385 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
3386 | ||
3387 | if (srv && nr >= srv_nr) | |
3388 | continue; | |
3389 | ||
3390 | srv_nr = nr; | |
3391 | srv_rw = !(flags & GPT_FLAG_READ_ONLY); | |
3392 | ||
3393 | r = free_and_strdup(&srv, node); | |
3394 | if (r < 0) | |
3395 | return log_oom(); | |
3396 | } | |
1b9e5b12 | 3397 | #ifdef GPT_ROOT_NATIVE |
ada4799a | 3398 | else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE)) { |
1b9e5b12 | 3399 | |
ada4799a LP |
3400 | if (root && nr >= root_nr) |
3401 | continue; | |
1b9e5b12 | 3402 | |
ada4799a LP |
3403 | root_nr = nr; |
3404 | root_rw = !(flags & GPT_FLAG_READ_ONLY); | |
727fd4fd | 3405 | |
ada4799a LP |
3406 | r = free_and_strdup(&root, node); |
3407 | if (r < 0) | |
3408 | return log_oom(); | |
3409 | } | |
1b9e5b12 LP |
3410 | #endif |
3411 | #ifdef GPT_ROOT_SECONDARY | |
ada4799a LP |
3412 | else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY)) { |
3413 | ||
3414 | if (secondary_root && nr >= secondary_root_nr) | |
3415 | continue; | |
3416 | ||
3417 | secondary_root_nr = nr; | |
3418 | secondary_root_rw = !(flags & GPT_FLAG_READ_ONLY); | |
3419 | ||
3420 | r = free_and_strdup(&secondary_root, node); | |
3421 | if (r < 0) | |
3422 | return log_oom(); | |
3423 | } | |
3424 | #endif | |
f6c51a81 LP |
3425 | else if (sd_id128_equal(type_id, GPT_LINUX_GENERIC)) { |
3426 | ||
3427 | if (generic) | |
3428 | multiple_generic = true; | |
3429 | else { | |
3430 | generic_rw = !(flags & GPT_FLAG_READ_ONLY); | |
3431 | ||
3432 | r = free_and_strdup(&generic, node); | |
3433 | if (r < 0) | |
3434 | return log_oom(); | |
3435 | } | |
3436 | } | |
ada4799a LP |
3437 | |
3438 | } else if (is_mbr) { | |
3439 | int type; | |
1b9e5b12 | 3440 | |
f6c51a81 LP |
3441 | if (flags != 0x80) /* Bootable flag */ |
3442 | continue; | |
3443 | ||
ada4799a LP |
3444 | type = blkid_partition_get_type(pp); |
3445 | if (type != 0x83) /* Linux partition */ | |
1b9e5b12 LP |
3446 | continue; |
3447 | ||
f6c51a81 LP |
3448 | if (generic) |
3449 | multiple_generic = true; | |
3450 | else { | |
3451 | generic_rw = true; | |
727fd4fd | 3452 | |
f6c51a81 LP |
3453 | r = free_and_strdup(&root, node); |
3454 | if (r < 0) | |
3455 | return log_oom(); | |
3456 | } | |
1b9e5b12 | 3457 | } |
1b9e5b12 LP |
3458 | } |
3459 | ||
1b9e5b12 LP |
3460 | if (root) { |
3461 | *root_device = root; | |
3462 | root = NULL; | |
727fd4fd LP |
3463 | |
3464 | *root_device_rw = root_rw; | |
1b9e5b12 LP |
3465 | *secondary = false; |
3466 | } else if (secondary_root) { | |
3467 | *root_device = secondary_root; | |
3468 | secondary_root = NULL; | |
727fd4fd LP |
3469 | |
3470 | *root_device_rw = secondary_root_rw; | |
1b9e5b12 | 3471 | *secondary = true; |
f6c51a81 LP |
3472 | } else if (generic) { |
3473 | ||
3474 | /* There were no partitions with precise meanings | |
3475 | * around, but we found generic partitions. In this | |
3476 | * case, if there's only one, we can go ahead and boot | |
3477 | * it, otherwise we bail out, because we really cannot | |
3478 | * make any sense of it. */ | |
3479 | ||
3480 | if (multiple_generic) { | |
3481 | log_error("Identified multiple bootable Linux partitions on\n" | |
3482 | " %s\n" | |
3483 | PARTITION_TABLE_BLURB, arg_image); | |
3484 | return -EINVAL; | |
3485 | } | |
3486 | ||
3487 | *root_device = generic; | |
3488 | generic = NULL; | |
3489 | ||
3490 | *root_device_rw = generic_rw; | |
3491 | *secondary = false; | |
3492 | } else { | |
3493 | log_error("Failed to identify root partition in disk image\n" | |
3494 | " %s\n" | |
3495 | PARTITION_TABLE_BLURB, arg_image); | |
3496 | return -EINVAL; | |
1b9e5b12 LP |
3497 | } |
3498 | ||
3499 | if (home) { | |
3500 | *home_device = home; | |
3501 | home = NULL; | |
727fd4fd LP |
3502 | |
3503 | *home_device_rw = home_rw; | |
1b9e5b12 LP |
3504 | } |
3505 | ||
3506 | if (srv) { | |
3507 | *srv_device = srv; | |
3508 | srv = NULL; | |
727fd4fd LP |
3509 | |
3510 | *srv_device_rw = srv_rw; | |
1b9e5b12 LP |
3511 | } |
3512 | ||
3513 | return 0; | |
3514 | #else | |
3515 | log_error("--image= is not supported, compiled without blkid support."); | |
15411c0c | 3516 | return -EOPNOTSUPP; |
1b9e5b12 LP |
3517 | #endif |
3518 | } | |
3519 | ||
727fd4fd | 3520 | static int mount_device(const char *what, const char *where, const char *directory, bool rw) { |
1b9e5b12 LP |
3521 | #ifdef HAVE_BLKID |
3522 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; | |
3523 | const char *fstype, *p; | |
3524 | int r; | |
3525 | ||
3526 | assert(what); | |
3527 | assert(where); | |
3528 | ||
727fd4fd LP |
3529 | if (arg_read_only) |
3530 | rw = false; | |
3531 | ||
1b9e5b12 | 3532 | if (directory) |
63c372cb | 3533 | p = strjoina(where, directory); |
1b9e5b12 LP |
3534 | else |
3535 | p = where; | |
3536 | ||
3537 | errno = 0; | |
3538 | b = blkid_new_probe_from_filename(what); | |
3539 | if (!b) { | |
3540 | if (errno == 0) | |
3541 | return log_oom(); | |
56f64d95 | 3542 | log_error_errno(errno, "Failed to allocate prober for %s: %m", what); |
1b9e5b12 LP |
3543 | return -errno; |
3544 | } | |
3545 | ||
3546 | blkid_probe_enable_superblocks(b, 1); | |
3547 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
3548 | ||
3549 | errno = 0; | |
3550 | r = blkid_do_safeprobe(b); | |
3551 | if (r == -1 || r == 1) { | |
3552 | log_error("Cannot determine file system type of %s", what); | |
3553 | return -EINVAL; | |
3554 | } else if (r != 0) { | |
3555 | if (errno == 0) | |
3556 | errno = EIO; | |
56f64d95 | 3557 | log_error_errno(errno, "Failed to probe %s: %m", what); |
1b9e5b12 LP |
3558 | return -errno; |
3559 | } | |
3560 | ||
3561 | errno = 0; | |
3562 | if (blkid_probe_lookup_value(b, "TYPE", &fstype, NULL) < 0) { | |
3563 | if (errno == 0) | |
3564 | errno = EINVAL; | |
3565 | log_error("Failed to determine file system type of %s", what); | |
3566 | return -errno; | |
3567 | } | |
3568 | ||
3569 | if (streq(fstype, "crypto_LUKS")) { | |
3570 | log_error("nspawn currently does not support LUKS disk images."); | |
15411c0c | 3571 | return -EOPNOTSUPP; |
1b9e5b12 LP |
3572 | } |
3573 | ||
4a62c710 MS |
3574 | if (mount(what, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), NULL) < 0) |
3575 | return log_error_errno(errno, "Failed to mount %s: %m", what); | |
1b9e5b12 LP |
3576 | |
3577 | return 0; | |
3578 | #else | |
3579 | log_error("--image= is not supported, compiled without blkid support."); | |
15411c0c | 3580 | return -EOPNOTSUPP; |
1b9e5b12 LP |
3581 | #endif |
3582 | } | |
3583 | ||
727fd4fd LP |
3584 | static int mount_devices( |
3585 | const char *where, | |
3586 | const char *root_device, bool root_device_rw, | |
3587 | const char *home_device, bool home_device_rw, | |
3588 | const char *srv_device, bool srv_device_rw) { | |
1b9e5b12 LP |
3589 | int r; |
3590 | ||
3591 | assert(where); | |
3592 | ||
3593 | if (root_device) { | |
727fd4fd | 3594 | r = mount_device(root_device, arg_directory, NULL, root_device_rw); |
f647962d MS |
3595 | if (r < 0) |
3596 | return log_error_errno(r, "Failed to mount root directory: %m"); | |
1b9e5b12 LP |
3597 | } |
3598 | ||
3599 | if (home_device) { | |
727fd4fd | 3600 | r = mount_device(home_device, arg_directory, "/home", home_device_rw); |
f647962d MS |
3601 | if (r < 0) |
3602 | return log_error_errno(r, "Failed to mount home directory: %m"); | |
1b9e5b12 LP |
3603 | } |
3604 | ||
3605 | if (srv_device) { | |
727fd4fd | 3606 | r = mount_device(srv_device, arg_directory, "/srv", srv_device_rw); |
f647962d MS |
3607 | if (r < 0) |
3608 | return log_error_errno(r, "Failed to mount server data directory: %m"); | |
1b9e5b12 LP |
3609 | } |
3610 | ||
3611 | return 0; | |
3612 | } | |
3613 | ||
3614 | static void loop_remove(int nr, int *image_fd) { | |
3615 | _cleanup_close_ int control = -1; | |
e8c8ddcc | 3616 | int r; |
1b9e5b12 LP |
3617 | |
3618 | if (nr < 0) | |
3619 | return; | |
3620 | ||
3621 | if (image_fd && *image_fd >= 0) { | |
e8c8ddcc TG |
3622 | r = ioctl(*image_fd, LOOP_CLR_FD); |
3623 | if (r < 0) | |
5e4074aa | 3624 | log_debug_errno(errno, "Failed to close loop image: %m"); |
03e334a1 | 3625 | *image_fd = safe_close(*image_fd); |
1b9e5b12 LP |
3626 | } |
3627 | ||
3628 | control = open("/dev/loop-control", O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); | |
e8c8ddcc | 3629 | if (control < 0) { |
56f64d95 | 3630 | log_warning_errno(errno, "Failed to open /dev/loop-control: %m"); |
1b9e5b12 | 3631 | return; |
e8c8ddcc | 3632 | } |
1b9e5b12 | 3633 | |
e8c8ddcc TG |
3634 | r = ioctl(control, LOOP_CTL_REMOVE, nr); |
3635 | if (r < 0) | |
5e4074aa | 3636 | log_debug_errno(errno, "Failed to remove loop %d: %m", nr); |
1b9e5b12 LP |
3637 | } |
3638 | ||
0cb9fbcd LP |
3639 | static int spawn_getent(const char *database, const char *key, pid_t *rpid) { |
3640 | int pipe_fds[2]; | |
3641 | pid_t pid; | |
3642 | ||
3643 | assert(database); | |
3644 | assert(key); | |
3645 | assert(rpid); | |
3646 | ||
4a62c710 MS |
3647 | if (pipe2(pipe_fds, O_CLOEXEC) < 0) |
3648 | return log_error_errno(errno, "Failed to allocate pipe: %m"); | |
0cb9fbcd LP |
3649 | |
3650 | pid = fork(); | |
4a62c710 MS |
3651 | if (pid < 0) |
3652 | return log_error_errno(errno, "Failed to fork getent child: %m"); | |
3653 | else if (pid == 0) { | |
0cb9fbcd LP |
3654 | int nullfd; |
3655 | char *empty_env = NULL; | |
3656 | ||
3657 | if (dup3(pipe_fds[1], STDOUT_FILENO, 0) < 0) | |
3658 | _exit(EXIT_FAILURE); | |
3659 | ||
3660 | if (pipe_fds[0] > 2) | |
03e334a1 | 3661 | safe_close(pipe_fds[0]); |
0cb9fbcd | 3662 | if (pipe_fds[1] > 2) |
03e334a1 | 3663 | safe_close(pipe_fds[1]); |
0cb9fbcd LP |
3664 | |
3665 | nullfd = open("/dev/null", O_RDWR); | |
3666 | if (nullfd < 0) | |
3667 | _exit(EXIT_FAILURE); | |
3668 | ||
3669 | if (dup3(nullfd, STDIN_FILENO, 0) < 0) | |
3670 | _exit(EXIT_FAILURE); | |
3671 | ||
3672 | if (dup3(nullfd, STDERR_FILENO, 0) < 0) | |
3673 | _exit(EXIT_FAILURE); | |
3674 | ||
3675 | if (nullfd > 2) | |
03e334a1 | 3676 | safe_close(nullfd); |
0cb9fbcd | 3677 | |
ce30c8dc LP |
3678 | (void) reset_all_signal_handlers(); |
3679 | (void) reset_signal_mask(); | |
0cb9fbcd LP |
3680 | close_all_fds(NULL, 0); |
3681 | ||
4de82926 MM |
3682 | execle("/usr/bin/getent", "getent", database, key, NULL, &empty_env); |
3683 | execle("/bin/getent", "getent", database, key, NULL, &empty_env); | |
0cb9fbcd LP |
3684 | _exit(EXIT_FAILURE); |
3685 | } | |
3686 | ||
03e334a1 | 3687 | pipe_fds[1] = safe_close(pipe_fds[1]); |
0cb9fbcd LP |
3688 | |
3689 | *rpid = pid; | |
3690 | ||
3691 | return pipe_fds[0]; | |
3692 | } | |
3693 | ||
3694 | static int change_uid_gid(char **_home) { | |
a2a5291b ZJS |
3695 | char line[LINE_MAX], *x, *u, *g, *h; |
3696 | const char *word, *state; | |
0cb9fbcd LP |
3697 | _cleanup_free_ uid_t *uids = NULL; |
3698 | _cleanup_free_ char *home = NULL; | |
3699 | _cleanup_fclose_ FILE *f = NULL; | |
3700 | _cleanup_close_ int fd = -1; | |
3701 | unsigned n_uids = 0; | |
70f539ca | 3702 | size_t sz = 0, l; |
0cb9fbcd LP |
3703 | uid_t uid; |
3704 | gid_t gid; | |
3705 | pid_t pid; | |
3706 | int r; | |
3707 | ||
3708 | assert(_home); | |
3709 | ||
3710 | if (!arg_user || streq(arg_user, "root") || streq(arg_user, "0")) { | |
3711 | /* Reset everything fully to 0, just in case */ | |
3712 | ||
03cfe0d5 LP |
3713 | r = reset_uid_gid(); |
3714 | if (r < 0) | |
3715 | return log_error_errno(r, "Failed to become root: %m"); | |
0cb9fbcd LP |
3716 | |
3717 | *_home = NULL; | |
3718 | return 0; | |
3719 | } | |
3720 | ||
3721 | /* First, get user credentials */ | |
3722 | fd = spawn_getent("passwd", arg_user, &pid); | |
3723 | if (fd < 0) | |
3724 | return fd; | |
3725 | ||
3726 | f = fdopen(fd, "r"); | |
3727 | if (!f) | |
3728 | return log_oom(); | |
3729 | fd = -1; | |
3730 | ||
3731 | if (!fgets(line, sizeof(line), f)) { | |
3732 | ||
3733 | if (!ferror(f)) { | |
3734 | log_error("Failed to resolve user %s.", arg_user); | |
3735 | return -ESRCH; | |
3736 | } | |
3737 | ||
56f64d95 | 3738 | log_error_errno(errno, "Failed to read from getent: %m"); |
0cb9fbcd LP |
3739 | return -errno; |
3740 | } | |
3741 | ||
3742 | truncate_nl(line); | |
3743 | ||
820d3acf | 3744 | wait_for_terminate_and_warn("getent passwd", pid, true); |
0cb9fbcd LP |
3745 | |
3746 | x = strchr(line, ':'); | |
3747 | if (!x) { | |
3748 | log_error("/etc/passwd entry has invalid user field."); | |
3749 | return -EIO; | |
3750 | } | |
3751 | ||
3752 | u = strchr(x+1, ':'); | |
3753 | if (!u) { | |
3754 | log_error("/etc/passwd entry has invalid password field."); | |
3755 | return -EIO; | |
3756 | } | |
3757 | ||
3758 | u++; | |
3759 | g = strchr(u, ':'); | |
3760 | if (!g) { | |
3761 | log_error("/etc/passwd entry has invalid UID field."); | |
3762 | return -EIO; | |
3763 | } | |
3764 | ||
3765 | *g = 0; | |
3766 | g++; | |
3767 | x = strchr(g, ':'); | |
3768 | if (!x) { | |
3769 | log_error("/etc/passwd entry has invalid GID field."); | |
3770 | return -EIO; | |
3771 | } | |
3772 | ||
3773 | *x = 0; | |
3774 | h = strchr(x+1, ':'); | |
3775 | if (!h) { | |
3776 | log_error("/etc/passwd entry has invalid GECOS field."); | |
3777 | return -EIO; | |
3778 | } | |
3779 | ||
3780 | h++; | |
3781 | x = strchr(h, ':'); | |
3782 | if (!x) { | |
3783 | log_error("/etc/passwd entry has invalid home directory field."); | |
3784 | return -EIO; | |
3785 | } | |
3786 | ||
3787 | *x = 0; | |
3788 | ||
3789 | r = parse_uid(u, &uid); | |
3790 | if (r < 0) { | |
3791 | log_error("Failed to parse UID of user."); | |
3792 | return -EIO; | |
3793 | } | |
3794 | ||
3795 | r = parse_gid(g, &gid); | |
3796 | if (r < 0) { | |
3797 | log_error("Failed to parse GID of user."); | |
3798 | return -EIO; | |
3799 | } | |
3800 | ||
3801 | home = strdup(h); | |
3802 | if (!home) | |
3803 | return log_oom(); | |
3804 | ||
3805 | /* Second, get group memberships */ | |
3806 | fd = spawn_getent("initgroups", arg_user, &pid); | |
3807 | if (fd < 0) | |
3808 | return fd; | |
3809 | ||
3810 | fclose(f); | |
3811 | f = fdopen(fd, "r"); | |
3812 | if (!f) | |
3813 | return log_oom(); | |
3814 | fd = -1; | |
3815 | ||
3816 | if (!fgets(line, sizeof(line), f)) { | |
3817 | if (!ferror(f)) { | |
3818 | log_error("Failed to resolve user %s.", arg_user); | |
3819 | return -ESRCH; | |
3820 | } | |
3821 | ||
56f64d95 | 3822 | log_error_errno(errno, "Failed to read from getent: %m"); |
0cb9fbcd LP |
3823 | return -errno; |
3824 | } | |
3825 | ||
3826 | truncate_nl(line); | |
3827 | ||
820d3acf | 3828 | wait_for_terminate_and_warn("getent initgroups", pid, true); |
0cb9fbcd LP |
3829 | |
3830 | /* Skip over the username and subsequent separator whitespace */ | |
3831 | x = line; | |
3832 | x += strcspn(x, WHITESPACE); | |
3833 | x += strspn(x, WHITESPACE); | |
3834 | ||
a2a5291b | 3835 | FOREACH_WORD(word, l, x, state) { |
0cb9fbcd LP |
3836 | char c[l+1]; |
3837 | ||
a2a5291b | 3838 | memcpy(c, word, l); |
0cb9fbcd LP |
3839 | c[l] = 0; |
3840 | ||
3841 | if (!GREEDY_REALLOC(uids, sz, n_uids+1)) | |
3842 | return log_oom(); | |
3843 | ||
3844 | r = parse_uid(c, &uids[n_uids++]); | |
3845 | if (r < 0) { | |
3846 | log_error("Failed to parse group data from getent."); | |
3847 | return -EIO; | |
3848 | } | |
3849 | } | |
3850 | ||
3851 | r = mkdir_parents(home, 0775); | |
f647962d MS |
3852 | if (r < 0) |
3853 | return log_error_errno(r, "Failed to make home root directory: %m"); | |
0cb9fbcd LP |
3854 | |
3855 | r = mkdir_safe(home, 0755, uid, gid); | |
f647962d MS |
3856 | if (r < 0 && r != -EEXIST) |
3857 | return log_error_errno(r, "Failed to make home directory: %m"); | |
0cb9fbcd | 3858 | |
03cfe0d5 LP |
3859 | (void) fchown(STDIN_FILENO, uid, gid); |
3860 | (void) fchown(STDOUT_FILENO, uid, gid); | |
3861 | (void) fchown(STDERR_FILENO, uid, gid); | |
0cb9fbcd | 3862 | |
4a62c710 MS |
3863 | if (setgroups(n_uids, uids) < 0) |
3864 | return log_error_errno(errno, "Failed to set auxiliary groups: %m"); | |
0cb9fbcd | 3865 | |
4a62c710 MS |
3866 | if (setresgid(gid, gid, gid) < 0) |
3867 | return log_error_errno(errno, "setregid() failed: %m"); | |
0cb9fbcd | 3868 | |
4a62c710 MS |
3869 | if (setresuid(uid, uid, uid) < 0) |
3870 | return log_error_errno(errno, "setreuid() failed: %m"); | |
0cb9fbcd LP |
3871 | |
3872 | if (_home) { | |
3873 | *_home = home; | |
3874 | home = NULL; | |
3875 | } | |
3876 | ||
3877 | return 0; | |
3878 | } | |
3879 | ||
113cea80 | 3880 | /* |
6d416b9c LS |
3881 | * Return values: |
3882 | * < 0 : wait_for_terminate() failed to get the state of the | |
3883 | * container, the container was terminated by a signal, or | |
3884 | * failed for an unknown reason. No change is made to the | |
3885 | * container argument. | |
3886 | * > 0 : The program executed in the container terminated with an | |
3887 | * error. The exit code of the program executed in the | |
919699ec LP |
3888 | * container is returned. The container argument has been set |
3889 | * to CONTAINER_TERMINATED. | |
6d416b9c LS |
3890 | * 0 : The container is being rebooted, has been shut down or exited |
3891 | * successfully. The container argument has been set to either | |
3892 | * CONTAINER_TERMINATED or CONTAINER_REBOOTED. | |
113cea80 | 3893 | * |
6d416b9c LS |
3894 | * That is, success is indicated by a return value of zero, and an |
3895 | * error is indicated by a non-zero value. | |
113cea80 DH |
3896 | */ |
3897 | static int wait_for_container(pid_t pid, ContainerStatus *container) { | |
113cea80 | 3898 | siginfo_t status; |
919699ec | 3899 | int r; |
113cea80 DH |
3900 | |
3901 | r = wait_for_terminate(pid, &status); | |
f647962d MS |
3902 | if (r < 0) |
3903 | return log_warning_errno(r, "Failed to wait for container: %m"); | |
113cea80 DH |
3904 | |
3905 | switch (status.si_code) { | |
fddbb89c | 3906 | |
113cea80 | 3907 | case CLD_EXITED: |
919699ec LP |
3908 | if (status.si_status == 0) { |
3909 | log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s exited successfully.", arg_machine); | |
113cea80 | 3910 | |
fddbb89c | 3911 | } else |
919699ec | 3912 | log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s failed with error code %i.", arg_machine, status.si_status); |
fddbb89c | 3913 | |
919699ec LP |
3914 | *container = CONTAINER_TERMINATED; |
3915 | return status.si_status; | |
113cea80 DH |
3916 | |
3917 | case CLD_KILLED: | |
3918 | if (status.si_status == SIGINT) { | |
113cea80 | 3919 | |
919699ec | 3920 | log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s has been shut down.", arg_machine); |
113cea80 | 3921 | *container = CONTAINER_TERMINATED; |
919699ec LP |
3922 | return 0; |
3923 | ||
113cea80 | 3924 | } else if (status.si_status == SIGHUP) { |
113cea80 | 3925 | |
919699ec | 3926 | log_full(arg_quiet ? LOG_DEBUG : LOG_INFO, "Container %s is being rebooted.", arg_machine); |
113cea80 | 3927 | *container = CONTAINER_REBOOTED; |
919699ec | 3928 | return 0; |
113cea80 | 3929 | } |
919699ec | 3930 | |
113cea80 DH |
3931 | /* CLD_KILLED fallthrough */ |
3932 | ||
3933 | case CLD_DUMPED: | |
fddbb89c | 3934 | log_error("Container %s terminated by signal %s.", arg_machine, signal_to_string(status.si_status)); |
919699ec | 3935 | return -EIO; |
113cea80 DH |
3936 | |
3937 | default: | |
fddbb89c | 3938 | log_error("Container %s failed due to unknown reason.", arg_machine); |
919699ec | 3939 | return -EIO; |
113cea80 DH |
3940 | } |
3941 | ||
3942 | return r; | |
3943 | } | |
3944 | ||
e866af3a DH |
3945 | static void nop_handler(int sig) {} |
3946 | ||
023fb90b LP |
3947 | static int on_orderly_shutdown(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
3948 | pid_t pid; | |
3949 | ||
3950 | pid = PTR_TO_UINT32(userdata); | |
3951 | if (pid > 0) { | |
c6c8f6e2 | 3952 | if (kill(pid, arg_kill_signal) >= 0) { |
023fb90b LP |
3953 | log_info("Trying to halt container. Send SIGTERM again to trigger immediate termination."); |
3954 | sd_event_source_set_userdata(s, NULL); | |
3955 | return 0; | |
3956 | } | |
3957 | } | |
3958 | ||
3959 | sd_event_exit(sd_event_source_get_event(s), 0); | |
3960 | return 0; | |
3961 | } | |
3962 | ||
ec16945e | 3963 | static int determine_names(void) { |
1b9cebf6 | 3964 | int r; |
ec16945e LP |
3965 | |
3966 | if (!arg_image && !arg_directory) { | |
1b9cebf6 LP |
3967 | if (arg_machine) { |
3968 | _cleanup_(image_unrefp) Image *i = NULL; | |
3969 | ||
3970 | r = image_find(arg_machine, &i); | |
3971 | if (r < 0) | |
3972 | return log_error_errno(r, "Failed to find image for machine '%s': %m", arg_machine); | |
3973 | else if (r == 0) { | |
3974 | log_error("No image for machine '%s': %m", arg_machine); | |
3975 | return -ENOENT; | |
3976 | } | |
3977 | ||
aceac2f0 | 3978 | if (i->type == IMAGE_RAW) |
1b9cebf6 LP |
3979 | r = set_sanitized_path(&arg_image, i->path); |
3980 | else | |
3981 | r = set_sanitized_path(&arg_directory, i->path); | |
3982 | if (r < 0) | |
3983 | return log_error_errno(r, "Invalid image directory: %m"); | |
3984 | ||
aee327b8 LP |
3985 | if (!arg_ephemeral) |
3986 | arg_read_only = arg_read_only || i->read_only; | |
1b9cebf6 | 3987 | } else |
ec16945e LP |
3988 | arg_directory = get_current_dir_name(); |
3989 | ||
1b9cebf6 LP |
3990 | if (!arg_directory && !arg_machine) { |
3991 | log_error("Failed to determine path, please use -D or -i."); | |
ec16945e LP |
3992 | return -EINVAL; |
3993 | } | |
3994 | } | |
3995 | ||
3996 | if (!arg_machine) { | |
b9ba4dab LP |
3997 | if (arg_directory && path_equal(arg_directory, "/")) |
3998 | arg_machine = gethostname_malloc(); | |
3999 | else | |
4000 | arg_machine = strdup(basename(arg_image ?: arg_directory)); | |
4001 | ||
ec16945e LP |
4002 | if (!arg_machine) |
4003 | return log_oom(); | |
4004 | ||
4005 | hostname_cleanup(arg_machine, false); | |
4006 | if (!machine_name_is_valid(arg_machine)) { | |
4007 | log_error("Failed to determine machine name automatically, please use -M."); | |
4008 | return -EINVAL; | |
4009 | } | |
b9ba4dab LP |
4010 | |
4011 | if (arg_ephemeral) { | |
4012 | char *b; | |
4013 | ||
4014 | /* Add a random suffix when this is an | |
4015 | * ephemeral machine, so that we can run many | |
4016 | * instances at once without manually having | |
4017 | * to specify -M each time. */ | |
4018 | ||
4019 | if (asprintf(&b, "%s-%016" PRIx64, arg_machine, random_u64()) < 0) | |
4020 | return log_oom(); | |
4021 | ||
4022 | free(arg_machine); | |
4023 | arg_machine = b; | |
4024 | } | |
ec16945e LP |
4025 | } |
4026 | ||
4027 | return 0; | |
4028 | } | |
4029 | ||
03cfe0d5 | 4030 | static int determine_uid_shift(const char *directory) { |
6dac160c LP |
4031 | int r; |
4032 | ||
03cfe0d5 LP |
4033 | if (!arg_userns) { |
4034 | arg_uid_shift = 0; | |
6dac160c | 4035 | return 0; |
03cfe0d5 | 4036 | } |
6dac160c LP |
4037 | |
4038 | if (arg_uid_shift == UID_INVALID) { | |
4039 | struct stat st; | |
4040 | ||
03cfe0d5 | 4041 | r = stat(directory, &st); |
6dac160c | 4042 | if (r < 0) |
03cfe0d5 | 4043 | return log_error_errno(errno, "Failed to determine UID base of %s: %m", directory); |
6dac160c LP |
4044 | |
4045 | arg_uid_shift = st.st_uid & UINT32_C(0xffff0000); | |
4046 | ||
4047 | if (arg_uid_shift != (st.st_gid & UINT32_C(0xffff0000))) { | |
03cfe0d5 | 4048 | log_error("UID and GID base of %s don't match.", directory); |
6dac160c LP |
4049 | return -EINVAL; |
4050 | } | |
4051 | ||
4052 | arg_uid_range = UINT32_C(0x10000); | |
4053 | } | |
4054 | ||
4055 | if (arg_uid_shift > (uid_t) -1 - arg_uid_range) { | |
4056 | log_error("UID base too high for UID range."); | |
4057 | return -EINVAL; | |
4058 | } | |
4059 | ||
4060 | log_info("Using user namespaces with base " UID_FMT " and range " UID_FMT ".", arg_uid_shift, arg_uid_range); | |
4061 | return 0; | |
4062 | } | |
4063 | ||
03cfe0d5 LP |
4064 | static int inner_child( |
4065 | Barrier *barrier, | |
4066 | const char *directory, | |
4067 | bool secondary, | |
4068 | int kmsg_socket, | |
4069 | int rtnl_socket, | |
4070 | FDSet *fds, | |
4071 | int argc, | |
4072 | char *argv[]) { | |
69c79d3c | 4073 | |
03cfe0d5 LP |
4074 | _cleanup_free_ char *home = NULL; |
4075 | unsigned n_env = 2; | |
4076 | const char *envp[] = { | |
4077 | "PATH=" DEFAULT_PATH_SPLIT_USR, | |
4078 | "container=systemd-nspawn", /* LXC sets container=lxc, so follow the scheme here */ | |
4079 | NULL, /* TERM */ | |
4080 | NULL, /* HOME */ | |
4081 | NULL, /* USER */ | |
4082 | NULL, /* LOGNAME */ | |
4083 | NULL, /* container_uuid */ | |
4084 | NULL, /* LISTEN_FDS */ | |
4085 | NULL, /* LISTEN_PID */ | |
4086 | NULL | |
4087 | }; | |
88213476 | 4088 | |
2371271c | 4089 | _cleanup_strv_free_ char **env_use = NULL; |
03cfe0d5 | 4090 | int r; |
88213476 | 4091 | |
03cfe0d5 LP |
4092 | assert(barrier); |
4093 | assert(directory); | |
4094 | assert(kmsg_socket >= 0); | |
88213476 | 4095 | |
03cfe0d5 LP |
4096 | if (arg_userns) { |
4097 | /* Tell the parent, that it now can write the UID map. */ | |
4098 | (void) barrier_place(barrier); /* #1 */ | |
7027ff61 | 4099 | |
03cfe0d5 LP |
4100 | /* Wait until the parent wrote the UID map */ |
4101 | if (!barrier_place_and_sync(barrier)) { /* #2 */ | |
4102 | log_error("Parent died too early"); | |
4103 | return -ESRCH; | |
4104 | } | |
88213476 LP |
4105 | } |
4106 | ||
03cfe0d5 LP |
4107 | r = mount_all(NULL, true); |
4108 | if (r < 0) | |
4109 | return r; | |
4110 | ||
4111 | /* Wait until we are cgroup-ified, so that we | |
4112 | * can mount the right cgroup path writable */ | |
4113 | if (!barrier_place_and_sync(barrier)) { /* #3 */ | |
4114 | log_error("Parent died too early"); | |
4115 | return -ESRCH; | |
88213476 LP |
4116 | } |
4117 | ||
03cfe0d5 LP |
4118 | r = mount_systemd_cgroup_writable(""); |
4119 | if (r < 0) | |
4120 | return r; | |
ec16945e | 4121 | |
03cfe0d5 LP |
4122 | r = reset_uid_gid(); |
4123 | if (r < 0) | |
4124 | return log_error_errno(r, "Couldn't become new root: %m"); | |
1b9e5b12 | 4125 | |
03cfe0d5 LP |
4126 | r = setup_boot_id(NULL); |
4127 | if (r < 0) | |
4128 | return r; | |
ec16945e | 4129 | |
03cfe0d5 LP |
4130 | r = setup_kmsg(NULL, kmsg_socket); |
4131 | if (r < 0) | |
4132 | return r; | |
4133 | kmsg_socket = safe_close(kmsg_socket); | |
ec16945e | 4134 | |
03cfe0d5 | 4135 | umask(0022); |
30535c16 | 4136 | |
03cfe0d5 LP |
4137 | if (setsid() < 0) |
4138 | return log_error_errno(errno, "setsid() failed: %m"); | |
4139 | ||
4140 | if (arg_private_network) | |
4141 | loopback_setup(); | |
4142 | ||
4143 | r = send_rtnl(rtnl_socket); | |
4144 | if (r < 0) | |
4145 | return r; | |
4146 | rtnl_socket = safe_close(rtnl_socket); | |
4147 | ||
4148 | if (drop_capabilities() < 0) | |
4149 | return log_error_errno(errno, "drop_capabilities() failed: %m"); | |
4150 | ||
4151 | setup_hostname(); | |
4152 | ||
050f7277 | 4153 | if (arg_personality != PERSONALITY_INVALID) { |
03cfe0d5 LP |
4154 | if (personality(arg_personality) < 0) |
4155 | return log_error_errno(errno, "personality() failed: %m"); | |
4156 | } else if (secondary) { | |
4157 | if (personality(PER_LINUX32) < 0) | |
4158 | return log_error_errno(errno, "personality() failed: %m"); | |
4159 | } | |
4160 | ||
4161 | #ifdef HAVE_SELINUX | |
4162 | if (arg_selinux_context) | |
4163 | if (setexeccon((security_context_t) arg_selinux_context) < 0) | |
4164 | return log_error_errno(errno, "setexeccon(\"%s\") failed: %m", arg_selinux_context); | |
4165 | #endif | |
4166 | ||
4167 | r = change_uid_gid(&home); | |
4168 | if (r < 0) | |
4169 | return r; | |
4170 | ||
4171 | envp[n_env] = strv_find_prefix(environ, "TERM="); | |
4172 | if (envp[n_env]) | |
4173 | n_env ++; | |
4174 | ||
4175 | if ((asprintf((char**)(envp + n_env++), "HOME=%s", home ? home: "/root") < 0) || | |
4176 | (asprintf((char**)(envp + n_env++), "USER=%s", arg_user ? arg_user : "root") < 0) || | |
4177 | (asprintf((char**)(envp + n_env++), "LOGNAME=%s", arg_user ? arg_user : "root") < 0)) | |
4178 | return log_oom(); | |
4179 | ||
4180 | if (!sd_id128_equal(arg_uuid, SD_ID128_NULL)) { | |
4181 | char as_uuid[37]; | |
4182 | ||
4183 | if (asprintf((char**)(envp + n_env++), "container_uuid=%s", id128_format_as_uuid(arg_uuid, as_uuid)) < 0) | |
4184 | return log_oom(); | |
4185 | } | |
4186 | ||
4187 | if (fdset_size(fds) > 0) { | |
4188 | r = fdset_cloexec(fds, false); | |
4189 | if (r < 0) | |
4190 | return log_error_errno(r, "Failed to unset O_CLOEXEC for file descriptors."); | |
4191 | ||
4192 | if ((asprintf((char **)(envp + n_env++), "LISTEN_FDS=%u", fdset_size(fds)) < 0) || | |
4193 | (asprintf((char **)(envp + n_env++), "LISTEN_PID=1") < 0)) | |
4194 | return log_oom(); | |
4195 | } | |
4196 | ||
2371271c TG |
4197 | env_use = strv_env_merge(2, envp, arg_setenv); |
4198 | if (!env_use) | |
4199 | return log_oom(); | |
03cfe0d5 LP |
4200 | |
4201 | /* Let the parent know that we are ready and | |
4202 | * wait until the parent is ready with the | |
4203 | * setup, too... */ | |
4204 | if (!barrier_place_and_sync(barrier)) { /* #4 */ | |
4205 | log_error("Parent died too early"); | |
4206 | return -ESRCH; | |
4207 | } | |
4208 | ||
4209 | /* Now, explicitly close the log, so that we | |
4210 | * then can close all remaining fds. Closing | |
4211 | * the log explicitly first has the benefit | |
4212 | * that the logging subsystem knows about it, | |
4213 | * and is thus ready to be reopened should we | |
4214 | * need it again. Note that the other fds | |
4215 | * closed here are at least the locking and | |
4216 | * barrier fds. */ | |
4217 | log_close(); | |
4218 | (void) fdset_close_others(fds); | |
4219 | ||
4220 | if (arg_boot) { | |
4221 | char **a; | |
4222 | size_t m; | |
4223 | ||
4224 | /* Automatically search for the init system */ | |
4225 | ||
4226 | m = 1 + argc - optind; | |
4227 | a = newa(char*, m + 1); | |
4228 | memcpy(a + 1, argv + optind, m * sizeof(char*)); | |
4229 | ||
4230 | a[0] = (char*) "/usr/lib/systemd/systemd"; | |
4231 | execve(a[0], a, env_use); | |
4232 | ||
4233 | a[0] = (char*) "/lib/systemd/systemd"; | |
4234 | execve(a[0], a, env_use); | |
4235 | ||
4236 | a[0] = (char*) "/sbin/init"; | |
4237 | execve(a[0], a, env_use); | |
4238 | } else if (argc > optind) | |
4239 | execvpe(argv[optind], argv + optind, env_use); | |
4240 | else { | |
4241 | chdir(home ? home : "/root"); | |
4242 | execle("/bin/bash", "-bash", NULL, env_use); | |
4243 | execle("/bin/sh", "-sh", NULL, env_use); | |
4244 | } | |
4245 | ||
4246 | (void) log_open(); | |
4247 | return log_error_errno(errno, "execv() failed: %m"); | |
4248 | } | |
4249 | ||
4250 | static int outer_child( | |
4251 | Barrier *barrier, | |
4252 | const char *directory, | |
4253 | const char *console, | |
4254 | const char *root_device, bool root_device_rw, | |
4255 | const char *home_device, bool home_device_rw, | |
4256 | const char *srv_device, bool srv_device_rw, | |
4257 | bool interactive, | |
4258 | bool secondary, | |
4259 | int pid_socket, | |
4260 | int kmsg_socket, | |
4261 | int rtnl_socket, | |
4262 | FDSet *fds, | |
4263 | int argc, | |
4264 | char *argv[]) { | |
4265 | ||
4266 | pid_t pid; | |
4267 | ssize_t l; | |
4268 | int r; | |
4269 | ||
4270 | assert(barrier); | |
4271 | assert(directory); | |
4272 | assert(console); | |
4273 | assert(pid_socket >= 0); | |
4274 | assert(kmsg_socket >= 0); | |
4275 | ||
4276 | if (prctl(PR_SET_PDEATHSIG, SIGKILL) < 0) | |
4277 | return log_error_errno(errno, "PR_SET_PDEATHSIG failed: %m"); | |
4278 | ||
4279 | if (interactive) { | |
4280 | close_nointr(STDIN_FILENO); | |
4281 | close_nointr(STDOUT_FILENO); | |
4282 | close_nointr(STDERR_FILENO); | |
4283 | ||
4284 | r = open_terminal(console, O_RDWR); | |
4285 | if (r != STDIN_FILENO) { | |
4286 | if (r >= 0) { | |
4287 | safe_close(r); | |
4288 | r = -EINVAL; | |
4289 | } | |
4290 | ||
4291 | return log_error_errno(r, "Failed to open console: %m"); | |
4292 | } | |
4293 | ||
4294 | if (dup2(STDIN_FILENO, STDOUT_FILENO) != STDOUT_FILENO || | |
4295 | dup2(STDIN_FILENO, STDERR_FILENO) != STDERR_FILENO) | |
4296 | return log_error_errno(errno, "Failed to duplicate console: %m"); | |
4297 | } | |
4298 | ||
4299 | r = reset_audit_loginuid(); | |
4300 | if (r < 0) | |
4301 | return r; | |
4302 | ||
4303 | /* Mark everything as slave, so that we still | |
4304 | * receive mounts from the real root, but don't | |
4305 | * propagate mounts to the real root. */ | |
4306 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) | |
4307 | return log_error_errno(errno, "MS_SLAVE|MS_REC failed: %m"); | |
4308 | ||
4309 | r = mount_devices(directory, | |
4310 | root_device, root_device_rw, | |
4311 | home_device, home_device_rw, | |
4312 | srv_device, srv_device_rw); | |
4313 | if (r < 0) | |
4314 | return r; | |
4315 | ||
4316 | r = determine_uid_shift(directory); | |
4317 | if (r < 0) | |
4318 | return r; | |
4319 | ||
4320 | /* Turn directory into bind mount */ | |
4321 | if (mount(directory, directory, NULL, MS_BIND|MS_REC, NULL) < 0) | |
4322 | return log_error_errno(errno, "Failed to make bind mount: %m"); | |
4323 | ||
03cfe0d5 LP |
4324 | r = setup_volatile(directory); |
4325 | if (r < 0) | |
4326 | return r; | |
4327 | ||
03cfe0d5 LP |
4328 | r = setup_volatile_state(directory); |
4329 | if (r < 0) | |
4330 | return r; | |
4331 | ||
03cfe0d5 LP |
4332 | r = base_filesystem_create(directory, arg_uid_shift, (gid_t) arg_uid_shift); |
4333 | if (r < 0) | |
4334 | return r; | |
4335 | ||
03cfe0d5 LP |
4336 | if (arg_read_only) { |
4337 | r = bind_remount_recursive(directory, true); | |
4338 | if (r < 0) | |
4339 | return log_error_errno(r, "Failed to make tree read-only: %m"); | |
4340 | } | |
4341 | ||
03cfe0d5 LP |
4342 | r = mount_all(directory, false); |
4343 | if (r < 0) | |
4344 | return r; | |
4345 | ||
4346 | if (copy_devnodes(directory) < 0) | |
4347 | return r; | |
4348 | ||
4349 | dev_setup(directory, arg_uid_shift, arg_uid_shift); | |
4350 | ||
4351 | if (setup_pts(directory) < 0) | |
4352 | return r; | |
4353 | ||
4354 | r = setup_propagate(directory); | |
4355 | if (r < 0) | |
4356 | return r; | |
4357 | ||
4358 | r = setup_dev_console(directory, console); | |
4359 | if (r < 0) | |
4360 | return r; | |
4361 | ||
4362 | r = setup_seccomp(); | |
4363 | if (r < 0) | |
4364 | return r; | |
4365 | ||
4366 | r = setup_timezone(directory); | |
4367 | if (r < 0) | |
4368 | return r; | |
4369 | ||
4370 | r = setup_resolv_conf(directory); | |
4371 | if (r < 0) | |
4372 | return r; | |
4373 | ||
4374 | r = setup_journal(directory); | |
4375 | if (r < 0) | |
4376 | return r; | |
4377 | ||
4378 | r = mount_custom(directory); | |
4379 | if (r < 0) | |
4380 | return r; | |
4381 | ||
4382 | r = mount_cgroup(directory); | |
4383 | if (r < 0) | |
4384 | return r; | |
4385 | ||
4386 | r = mount_move_root(directory); | |
4387 | if (r < 0) | |
4388 | return log_error_errno(r, "Failed to move root directory: %m"); | |
4389 | ||
4390 | pid = raw_clone(SIGCHLD|CLONE_NEWNS| | |
4391 | (arg_share_system ? 0 : CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWUTS) | | |
4392 | (arg_private_network ? CLONE_NEWNET : 0) | | |
4393 | (arg_userns ? CLONE_NEWUSER : 0), | |
4394 | NULL); | |
4395 | if (pid < 0) | |
4396 | return log_error_errno(errno, "Failed to fork inner child: %m"); | |
4397 | ||
4398 | if (pid == 0) { | |
4399 | pid_socket = safe_close(pid_socket); | |
4400 | ||
4401 | /* The inner child has all namespaces that are | |
4402 | * requested, so that we all are owned by the user if | |
4403 | * user namespaces are turned on. */ | |
4404 | ||
4405 | r = inner_child(barrier, directory, secondary, kmsg_socket, rtnl_socket, fds, argc, argv); | |
4406 | if (r < 0) | |
4407 | _exit(EXIT_FAILURE); | |
4408 | ||
4409 | _exit(EXIT_SUCCESS); | |
4410 | } | |
4411 | ||
4412 | l = send(pid_socket, &pid, sizeof(pid), MSG_NOSIGNAL); | |
4413 | if (l < 0) | |
4414 | return log_error_errno(errno, "Failed to send PID: %m"); | |
4415 | if (l != sizeof(pid)) { | |
4416 | log_error("Short write while sending PID."); | |
4417 | return -EIO; | |
4418 | } | |
4419 | ||
4420 | pid_socket = safe_close(pid_socket); | |
4421 | ||
4422 | return 0; | |
4423 | } | |
4424 | ||
4425 | static int setup_uid_map(pid_t pid) { | |
4426 | char uid_map[strlen("/proc//uid_map") + DECIMAL_STR_MAX(uid_t) + 1], line[DECIMAL_STR_MAX(uid_t)*3+3+1]; | |
4427 | int r; | |
4428 | ||
4429 | assert(pid > 1); | |
4430 | ||
4431 | xsprintf(uid_map, "/proc/" PID_FMT "/uid_map", pid); | |
4432 | xsprintf(line, UID_FMT " " UID_FMT " " UID_FMT "\n", 0, arg_uid_shift, arg_uid_range); | |
4433 | r = write_string_file(uid_map, line); | |
4434 | if (r < 0) | |
4435 | return log_error_errno(r, "Failed to write UID map: %m"); | |
4436 | ||
4437 | /* We always assign the same UID and GID ranges */ | |
4438 | xsprintf(uid_map, "/proc/" PID_FMT "/gid_map", pid); | |
4439 | r = write_string_file(uid_map, line); | |
4440 | if (r < 0) | |
4441 | return log_error_errno(r, "Failed to write GID map: %m"); | |
4442 | ||
4443 | return 0; | |
4444 | } | |
4445 | ||
4446 | static int chown_cgroup(pid_t pid) { | |
4447 | _cleanup_free_ char *path = NULL, *fs = NULL; | |
4448 | _cleanup_close_ int fd = -1; | |
4449 | const char *fn; | |
4450 | int r; | |
4451 | ||
4452 | r = cg_pid_get_path(NULL, pid, &path); | |
4453 | if (r < 0) | |
4454 | return log_error_errno(r, "Failed to get container cgroup path: %m"); | |
4455 | ||
4456 | r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, path, NULL, &fs); | |
4457 | if (r < 0) | |
4458 | return log_error_errno(r, "Failed to get file system path for container cgroup: %m"); | |
4459 | ||
4460 | fd = open(fs, O_RDONLY|O_CLOEXEC|O_DIRECTORY); | |
4461 | if (fd < 0) | |
4462 | return log_error_errno(errno, "Failed to open %s: %m", fs); | |
4463 | ||
4464 | FOREACH_STRING(fn, ".", "tasks", "notify_on_release", "cgroup.procs", "cgroup.clone_children") | |
4465 | if (fchownat(fd, fn, arg_uid_shift, arg_uid_shift, 0) < 0) | |
4466 | log_warning_errno(errno, "Failed to chown() cgroup file %s, ignoring: %m", fn); | |
4467 | ||
4468 | return 0; | |
4469 | } | |
4470 | ||
4471 | int main(int argc, char *argv[]) { | |
4472 | ||
4473 | _cleanup_free_ char *device_path = NULL, *root_device = NULL, *home_device = NULL, *srv_device = NULL, *console = NULL; | |
4474 | bool root_device_rw = true, home_device_rw = true, srv_device_rw = true; | |
4475 | _cleanup_close_ int master = -1, image_fd = -1; | |
4476 | _cleanup_fdset_free_ FDSet *fds = NULL; | |
4477 | int r, n_fd_passed, loop_nr = -1; | |
4478 | char veth_name[IFNAMSIZ]; | |
4479 | bool secondary = false, remove_subvol = false; | |
72c0a2c2 | 4480 | sigset_t mask_chld; |
03cfe0d5 LP |
4481 | pid_t pid = 0; |
4482 | int ret = EXIT_SUCCESS; | |
4483 | union in_addr_union exposed = {}; | |
4484 | _cleanup_release_lock_file_ LockFile tree_global_lock = LOCK_FILE_INIT, tree_local_lock = LOCK_FILE_INIT; | |
4485 | bool interactive; | |
4486 | ||
4487 | log_parse_environment(); | |
4488 | log_open(); | |
4489 | ||
4490 | r = parse_argv(argc, argv); | |
4491 | if (r <= 0) | |
4492 | goto finish; | |
4493 | ||
4494 | r = determine_names(); | |
4495 | if (r < 0) | |
4496 | goto finish; | |
4497 | ||
4498 | if (geteuid() != 0) { | |
4499 | log_error("Need to be root."); | |
4500 | r = -EPERM; | |
4501 | goto finish; | |
4502 | } | |
4503 | ||
4504 | n_fd_passed = sd_listen_fds(false); | |
4505 | if (n_fd_passed > 0) { | |
4506 | r = fdset_new_listen_fds(&fds, false); | |
4507 | if (r < 0) { | |
4508 | log_error_errno(r, "Failed to collect file descriptors: %m"); | |
4509 | goto finish; | |
4510 | } | |
4511 | } | |
4512 | ||
4513 | if (arg_directory) { | |
4514 | assert(!arg_image); | |
4515 | ||
4516 | if (path_equal(arg_directory, "/") && !arg_ephemeral) { | |
4517 | log_error("Spawning container on root directory is not supported. Consider using --ephemeral."); | |
4518 | r = -EINVAL; | |
4519 | goto finish; | |
4520 | } | |
4521 | ||
4522 | if (arg_ephemeral) { | |
4523 | _cleanup_free_ char *np = NULL; | |
4524 | ||
4525 | /* If the specified path is a mount point we | |
4526 | * generate the new snapshot immediately | |
4527 | * inside it under a random name. However if | |
4528 | * the specified is not a mount point we | |
4529 | * create the new snapshot in the parent | |
4530 | * directory, just next to it. */ | |
e26d6ce5 | 4531 | r = path_is_mount_point(arg_directory, 0); |
03cfe0d5 LP |
4532 | if (r < 0) { |
4533 | log_error_errno(r, "Failed to determine whether directory %s is mount point: %m", arg_directory); | |
4534 | goto finish; | |
4535 | } | |
4536 | if (r > 0) | |
770b5ce4 | 4537 | r = tempfn_random_child(arg_directory, "machine.", &np); |
03cfe0d5 | 4538 | else |
770b5ce4 | 4539 | r = tempfn_random(arg_directory, "machine.", &np); |
03cfe0d5 LP |
4540 | if (r < 0) { |
4541 | log_error_errno(r, "Failed to generate name for snapshot: %m"); | |
4542 | goto finish; | |
4543 | } | |
4544 | ||
4545 | r = image_path_lock(np, (arg_read_only ? LOCK_SH : LOCK_EX) | LOCK_NB, &tree_global_lock, &tree_local_lock); | |
4546 | if (r < 0) { | |
4547 | log_error_errno(r, "Failed to lock %s: %m", np); | |
4548 | goto finish; | |
4549 | } | |
4550 | ||
4551 | r = btrfs_subvol_snapshot(arg_directory, np, (arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE); | |
4552 | if (r < 0) { | |
4553 | log_error_errno(r, "Failed to create snapshot %s from %s: %m", np, arg_directory); | |
4554 | goto finish; | |
ec16945e LP |
4555 | } |
4556 | ||
4557 | free(arg_directory); | |
4558 | arg_directory = np; | |
8a16a7b4 | 4559 | np = NULL; |
ec16945e LP |
4560 | |
4561 | remove_subvol = true; | |
30535c16 LP |
4562 | |
4563 | } else { | |
4564 | r = image_path_lock(arg_directory, (arg_read_only ? LOCK_SH : LOCK_EX) | LOCK_NB, &tree_global_lock, &tree_local_lock); | |
4565 | if (r == -EBUSY) { | |
4566 | log_error_errno(r, "Directory tree %s is currently busy.", arg_directory); | |
4567 | goto finish; | |
4568 | } | |
4569 | if (r < 0) { | |
4570 | log_error_errno(r, "Failed to lock %s: %m", arg_directory); | |
4571 | return r; | |
4572 | } | |
4573 | ||
4574 | if (arg_template) { | |
f70a17f8 | 4575 | r = btrfs_subvol_snapshot(arg_template, arg_directory, (arg_read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE); |
30535c16 LP |
4576 | if (r == -EEXIST) { |
4577 | if (!arg_quiet) | |
4578 | log_info("Directory %s already exists, not populating from template %s.", arg_directory, arg_template); | |
4579 | } else if (r < 0) { | |
83521414 | 4580 | log_error_errno(r, "Couldn't create snapshot %s from %s: %m", arg_directory, arg_template); |
30535c16 LP |
4581 | goto finish; |
4582 | } else { | |
4583 | if (!arg_quiet) | |
4584 | log_info("Populated %s from template %s.", arg_directory, arg_template); | |
4585 | } | |
4586 | } | |
ec16945e LP |
4587 | } |
4588 | ||
1b9e5b12 LP |
4589 | if (arg_boot) { |
4590 | if (path_is_os_tree(arg_directory) <= 0) { | |
5ae4d543 | 4591 | log_error("Directory %s doesn't look like an OS root directory (os-release file is missing). Refusing.", arg_directory); |
ec16945e | 4592 | r = -EINVAL; |
1b9e5b12 LP |
4593 | goto finish; |
4594 | } | |
4595 | } else { | |
4596 | const char *p; | |
4597 | ||
63c372cb | 4598 | p = strjoina(arg_directory, |
1b9e5b12 LP |
4599 | argc > optind && path_is_absolute(argv[optind]) ? argv[optind] : "/usr/bin/"); |
4600 | if (access(p, F_OK) < 0) { | |
4601 | log_error("Directory %s lacks the binary to execute or doesn't look like a binary tree. Refusing.", arg_directory); | |
ec16945e | 4602 | r = -EINVAL; |
1b9e5b12 | 4603 | goto finish; |
1b9e5b12 LP |
4604 | } |
4605 | } | |
ec16945e | 4606 | |
6b9132a9 | 4607 | } else { |
1b9e5b12 | 4608 | char template[] = "/tmp/nspawn-root-XXXXXX"; |
6b9132a9 | 4609 | |
ec16945e LP |
4610 | assert(arg_image); |
4611 | assert(!arg_template); | |
4612 | ||
30535c16 LP |
4613 | r = image_path_lock(arg_image, (arg_read_only ? LOCK_SH : LOCK_EX) | LOCK_NB, &tree_global_lock, &tree_local_lock); |
4614 | if (r == -EBUSY) { | |
4615 | r = log_error_errno(r, "Disk image %s is currently busy.", arg_image); | |
4616 | goto finish; | |
4617 | } | |
4618 | if (r < 0) { | |
4619 | r = log_error_errno(r, "Failed to create image lock: %m"); | |
4620 | goto finish; | |
4621 | } | |
4622 | ||
1b9e5b12 | 4623 | if (!mkdtemp(template)) { |
56f64d95 | 4624 | log_error_errno(errno, "Failed to create temporary directory: %m"); |
1b9e5b12 | 4625 | r = -errno; |
6b9132a9 | 4626 | goto finish; |
1b9e5b12 | 4627 | } |
6b9132a9 | 4628 | |
1b9e5b12 LP |
4629 | arg_directory = strdup(template); |
4630 | if (!arg_directory) { | |
4631 | r = log_oom(); | |
4632 | goto finish; | |
6b9132a9 | 4633 | } |
88213476 | 4634 | |
1b9e5b12 LP |
4635 | image_fd = setup_image(&device_path, &loop_nr); |
4636 | if (image_fd < 0) { | |
4637 | r = image_fd; | |
842f3b0f LP |
4638 | goto finish; |
4639 | } | |
1b9e5b12 | 4640 | |
4d9f07b4 LP |
4641 | r = dissect_image(image_fd, |
4642 | &root_device, &root_device_rw, | |
4643 | &home_device, &home_device_rw, | |
4644 | &srv_device, &srv_device_rw, | |
4645 | &secondary); | |
1b9e5b12 LP |
4646 | if (r < 0) |
4647 | goto finish; | |
842f3b0f | 4648 | } |
842f3b0f | 4649 | |
5a8af538 LP |
4650 | r = custom_mounts_prepare(); |
4651 | if (r < 0) | |
4652 | goto finish; | |
4653 | ||
03cfe0d5 LP |
4654 | interactive = |
4655 | isatty(STDIN_FILENO) > 0 && | |
4656 | isatty(STDOUT_FILENO) > 0; | |
9c857b9d | 4657 | |
db7feb7e LP |
4658 | master = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC|O_NDELAY); |
4659 | if (master < 0) { | |
ec16945e | 4660 | r = log_error_errno(errno, "Failed to acquire pseudo tty: %m"); |
a258bf26 LP |
4661 | goto finish; |
4662 | } | |
4663 | ||
611b312b LP |
4664 | r = ptsname_malloc(master, &console); |
4665 | if (r < 0) { | |
4666 | r = log_error_errno(r, "Failed to determine tty name: %m"); | |
a258bf26 LP |
4667 | goto finish; |
4668 | } | |
4669 | ||
a258bf26 | 4670 | if (unlockpt(master) < 0) { |
ec16945e | 4671 | r = log_error_errno(errno, "Failed to unlock tty: %m"); |
a258bf26 LP |
4672 | goto finish; |
4673 | } | |
4674 | ||
9c857b9d LP |
4675 | if (!arg_quiet) |
4676 | log_info("Spawning container %s on %s.\nPress ^] three times within 1s to kill container.", | |
4677 | arg_machine, arg_image ?: arg_directory); | |
4678 | ||
72c0a2c2 | 4679 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGWINCH, SIGTERM, SIGINT, -1) >= 0); |
a258bf26 | 4680 | |
023fb90b LP |
4681 | assert_se(sigemptyset(&mask_chld) == 0); |
4682 | assert_se(sigaddset(&mask_chld, SIGCHLD) == 0); | |
4683 | ||
03cfe0d5 LP |
4684 | if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) { |
4685 | r = log_error_errno(errno, "Failed to become subreaper: %m"); | |
4686 | goto finish; | |
4687 | } | |
4688 | ||
d87be9b0 | 4689 | for (;;) { |
03cfe0d5 | 4690 | _cleanup_close_pair_ int kmsg_socket_pair[2] = { -1, -1 }, rtnl_socket_pair[2] = { -1, -1 }, pid_socket_pair[2] = { -1, -1 }; |
113cea80 | 4691 | ContainerStatus container_status; |
7566e267 | 4692 | _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL; |
03cfe0d5 | 4693 | static const struct sigaction sa = { |
e866af3a DH |
4694 | .sa_handler = nop_handler, |
4695 | .sa_flags = SA_NOCLDSTOP, | |
4696 | }; | |
03cfe0d5 LP |
4697 | int ifi = 0; |
4698 | ssize_t l; | |
4699 | _cleanup_event_unref_ sd_event *event = NULL; | |
4700 | _cleanup_(pty_forward_freep) PTYForward *forward = NULL; | |
1c4baffc | 4701 | _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; |
03cfe0d5 | 4702 | char last_char = 0; |
e866af3a | 4703 | |
7566e267 | 4704 | r = barrier_create(&barrier); |
a2da110b | 4705 | if (r < 0) { |
da927ba9 | 4706 | log_error_errno(r, "Cannot initialize IPC barrier: %m"); |
a2da110b DH |
4707 | goto finish; |
4708 | } | |
4709 | ||
6d0b55c2 LP |
4710 | if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, kmsg_socket_pair) < 0) { |
4711 | r = log_error_errno(errno, "Failed to create kmsg socket pair: %m"); | |
4712 | goto finish; | |
4713 | } | |
4714 | ||
4715 | if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, rtnl_socket_pair) < 0) { | |
4716 | r = log_error_errno(errno, "Failed to create rtnl socket pair: %m"); | |
4717 | goto finish; | |
4718 | } | |
4719 | ||
03cfe0d5 LP |
4720 | if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, pid_socket_pair) < 0) { |
4721 | r = log_error_errno(errno, "Failed to create pid socket pair: %m"); | |
4722 | goto finish; | |
4723 | } | |
4724 | ||
e866af3a DH |
4725 | /* Child can be killed before execv(), so handle SIGCHLD |
4726 | * in order to interrupt parent's blocking calls and | |
4727 | * give it a chance to call wait() and terminate. */ | |
4728 | r = sigprocmask(SIG_UNBLOCK, &mask_chld, NULL); | |
4729 | if (r < 0) { | |
ec16945e | 4730 | r = log_error_errno(errno, "Failed to change the signal mask: %m"); |
d96c1ecf LP |
4731 | goto finish; |
4732 | } | |
4733 | ||
e866af3a DH |
4734 | r = sigaction(SIGCHLD, &sa, NULL); |
4735 | if (r < 0) { | |
ec16945e | 4736 | r = log_error_errno(errno, "Failed to install SIGCHLD handler: %m"); |
40ddbdf8 LP |
4737 | goto finish; |
4738 | } | |
4739 | ||
03cfe0d5 | 4740 | pid = raw_clone(SIGCHLD|CLONE_NEWNS, NULL); |
d87be9b0 LP |
4741 | if (pid < 0) { |
4742 | if (errno == EINVAL) | |
ec16945e | 4743 | r = log_error_errno(errno, "clone() failed, do you have namespace support enabled in your kernel? (You need UTS, IPC, PID and NET namespacing built in): %m"); |
d87be9b0 | 4744 | else |
ec16945e | 4745 | r = log_error_errno(errno, "clone() failed: %m"); |
a258bf26 | 4746 | |
d87be9b0 LP |
4747 | goto finish; |
4748 | } | |
a258bf26 | 4749 | |
d87be9b0 | 4750 | if (pid == 0) { |
03cfe0d5 | 4751 | /* The outer child only has a file system namespace. */ |
a2da110b DH |
4752 | barrier_set_role(&barrier, BARRIER_CHILD); |
4753 | ||
03e334a1 | 4754 | master = safe_close(master); |
a258bf26 | 4755 | |
03e334a1 | 4756 | kmsg_socket_pair[0] = safe_close(kmsg_socket_pair[0]); |
6d0b55c2 | 4757 | rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]); |
03cfe0d5 | 4758 | pid_socket_pair[0] = safe_close(pid_socket_pair[0]); |
a258bf26 | 4759 | |
ce30c8dc LP |
4760 | (void) reset_all_signal_handlers(); |
4761 | (void) reset_signal_mask(); | |
f5c1b9ee | 4762 | |
03cfe0d5 LP |
4763 | r = outer_child(&barrier, |
4764 | arg_directory, | |
4765 | console, | |
4766 | root_device, root_device_rw, | |
4767 | home_device, home_device_rw, | |
4768 | srv_device, srv_device_rw, | |
4769 | interactive, | |
4770 | secondary, | |
4771 | pid_socket_pair[1], | |
4772 | kmsg_socket_pair[1], | |
4773 | rtnl_socket_pair[1], | |
4774 | fds, | |
4775 | argc, argv); | |
0cb9fbcd | 4776 | if (r < 0) |
a2da110b | 4777 | _exit(EXIT_FAILURE); |
d87be9b0 | 4778 | |
03cfe0d5 | 4779 | _exit(EXIT_SUCCESS); |
da5b3bad | 4780 | } |
88213476 | 4781 | |
a2da110b | 4782 | barrier_set_role(&barrier, BARRIER_PARENT); |
03cfe0d5 | 4783 | |
842f3b0f LP |
4784 | fdset_free(fds); |
4785 | fds = NULL; | |
4786 | ||
6d0b55c2 LP |
4787 | kmsg_socket_pair[1] = safe_close(kmsg_socket_pair[1]); |
4788 | rtnl_socket_pair[1] = safe_close(rtnl_socket_pair[1]); | |
03cfe0d5 | 4789 | pid_socket_pair[1] = safe_close(pid_socket_pair[1]); |
6d0b55c2 | 4790 | |
03cfe0d5 LP |
4791 | /* Wait for the outer child. */ |
4792 | r = wait_for_terminate_and_warn("namespace helper", pid, NULL); | |
4793 | if (r < 0) | |
4794 | goto finish; | |
4795 | if (r != 0) { | |
4796 | r = -EIO; | |
4797 | goto finish; | |
4798 | } | |
4799 | pid = 0; | |
6dac160c | 4800 | |
03cfe0d5 LP |
4801 | /* And now retrieve the PID of the inner child. */ |
4802 | l = recv(pid_socket_pair[0], &pid, sizeof(pid), 0); | |
4803 | if (l < 0) { | |
4804 | r = log_error_errno(errno, "Failed to read inner child PID: %m"); | |
4805 | goto finish; | |
4806 | } | |
4807 | if (l != sizeof(pid)) { | |
4808 | log_error("Short read while reading inner child PID: %m"); | |
4809 | r = EIO; | |
4810 | goto finish; | |
4811 | } | |
354bfd2b | 4812 | |
03cfe0d5 | 4813 | log_debug("Init process invoked as PID " PID_FMT, pid); |
aa28aefe | 4814 | |
03cfe0d5 LP |
4815 | if (arg_userns) { |
4816 | if (!barrier_place_and_sync(&barrier)) { /* #1 */ | |
4817 | log_error("Child died too early."); | |
4818 | r = -ESRCH; | |
840295fc | 4819 | goto finish; |
03cfe0d5 | 4820 | } |
ab046dde | 4821 | |
03cfe0d5 | 4822 | r = setup_uid_map(pid); |
840295fc LP |
4823 | if (r < 0) |
4824 | goto finish; | |
ab046dde | 4825 | |
03cfe0d5 LP |
4826 | (void) barrier_place(&barrier); /* #2 */ |
4827 | } | |
c74e630d | 4828 | |
03cfe0d5 LP |
4829 | r = move_network_interfaces(pid); |
4830 | if (r < 0) | |
4831 | goto finish; | |
4bbfe7ad | 4832 | |
03cfe0d5 LP |
4833 | r = setup_veth(pid, veth_name, &ifi); |
4834 | if (r < 0) | |
4835 | goto finish; | |
5aa4bb6b | 4836 | |
03cfe0d5 LP |
4837 | r = setup_bridge(veth_name, &ifi); |
4838 | if (r < 0) | |
4839 | goto finish; | |
6dac160c | 4840 | |
03cfe0d5 LP |
4841 | r = setup_macvlan(pid); |
4842 | if (r < 0) | |
4843 | goto finish; | |
6dac160c | 4844 | |
03cfe0d5 LP |
4845 | r = setup_ipvlan(pid); |
4846 | if (r < 0) | |
4847 | goto finish; | |
6dac160c | 4848 | |
03cfe0d5 LP |
4849 | r = register_machine(pid, ifi); |
4850 | if (r < 0) | |
4851 | goto finish; | |
6dac160c | 4852 | |
03cfe0d5 LP |
4853 | r = chown_cgroup(pid); |
4854 | if (r < 0) | |
4855 | goto finish; | |
6dac160c | 4856 | |
03cfe0d5 LP |
4857 | /* Notify the child that the parent is ready with all |
4858 | * its setup (including cgroup-ification), and that | |
4859 | * the child can now hand over control to the code to | |
4860 | * run inside the container. */ | |
4861 | (void) barrier_place(&barrier); /* #3 */ | |
6dac160c | 4862 | |
03cfe0d5 LP |
4863 | /* Block SIGCHLD here, before notifying child. |
4864 | * process_pty() will handle it with the other signals. */ | |
4865 | assert_se(sigprocmask(SIG_BLOCK, &mask_chld, NULL) >= 0); | |
e866af3a | 4866 | |
03cfe0d5 LP |
4867 | /* Reset signal to default */ |
4868 | r = default_signals(SIGCHLD, -1); | |
4869 | if (r < 0) { | |
4870 | log_error_errno(r, "Failed to reset SIGCHLD: %m"); | |
4871 | goto finish; | |
4872 | } | |
e866af3a | 4873 | |
03cfe0d5 LP |
4874 | /* Let the child know that we are ready and wait that the child is completely ready now. */ |
4875 | if (!barrier_place_and_sync(&barrier)) { /* #5 */ | |
4876 | log_error("Client died too early."); | |
4877 | r = -ESRCH; | |
4878 | goto finish; | |
4879 | } | |
b12afc8c | 4880 | |
03cfe0d5 LP |
4881 | sd_notifyf(false, |
4882 | "READY=1\n" | |
4883 | "STATUS=Container running.\n" | |
4884 | "X_NSPAWN_LEADER_PID=" PID_FMT, pid); | |
354bfd2b | 4885 | |
03cfe0d5 LP |
4886 | r = sd_event_new(&event); |
4887 | if (r < 0) { | |
4888 | log_error_errno(r, "Failed to get default event source: %m"); | |
4889 | goto finish; | |
4890 | } | |
88213476 | 4891 | |
03cfe0d5 LP |
4892 | if (arg_kill_signal > 0) { |
4893 | /* Try to kill the init system on SIGINT or SIGTERM */ | |
4894 | sd_event_add_signal(event, NULL, SIGINT, on_orderly_shutdown, UINT32_TO_PTR(pid)); | |
4895 | sd_event_add_signal(event, NULL, SIGTERM, on_orderly_shutdown, UINT32_TO_PTR(pid)); | |
4896 | } else { | |
4897 | /* Immediately exit */ | |
4898 | sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); | |
4899 | sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL); | |
4900 | } | |
023fb90b | 4901 | |
03cfe0d5 LP |
4902 | /* simply exit on sigchld */ |
4903 | sd_event_add_signal(event, NULL, SIGCHLD, NULL, NULL); | |
023fb90b | 4904 | |
03cfe0d5 LP |
4905 | if (arg_expose_ports) { |
4906 | r = watch_rtnl(event, rtnl_socket_pair[0], &exposed, &rtnl); | |
4907 | if (r < 0) | |
4908 | goto finish; | |
023fb90b | 4909 | |
03cfe0d5 LP |
4910 | (void) expose_ports(rtnl, &exposed); |
4911 | } | |
023fb90b | 4912 | |
03cfe0d5 | 4913 | rtnl_socket_pair[0] = safe_close(rtnl_socket_pair[0]); |
c7b7d449 | 4914 | |
03cfe0d5 LP |
4915 | r = pty_forward_new(event, master, true, !interactive, &forward); |
4916 | if (r < 0) { | |
4917 | log_error_errno(r, "Failed to create PTY forwarder: %m"); | |
4918 | goto finish; | |
4919 | } | |
023fb90b | 4920 | |
03cfe0d5 LP |
4921 | r = sd_event_loop(event); |
4922 | if (r < 0) { | |
4923 | log_error_errno(r, "Failed to run event loop: %m"); | |
4924 | goto finish; | |
4925 | } | |
6d0b55c2 | 4926 | |
03cfe0d5 | 4927 | pty_forward_get_last_char(forward, &last_char); |
6d0b55c2 | 4928 | |
03cfe0d5 | 4929 | forward = pty_forward_free(forward); |
6d0b55c2 | 4930 | |
03cfe0d5 LP |
4931 | if (!arg_quiet && last_char != '\n') |
4932 | putc('\n', stdout); | |
04d39279 | 4933 | |
03cfe0d5 LP |
4934 | /* Kill if it is not dead yet anyway */ |
4935 | terminate_machine(pid); | |
1f0cd86b | 4936 | |
840295fc | 4937 | /* Normally redundant, but better safe than sorry */ |
04d39279 | 4938 | kill(pid, SIGKILL); |
a258bf26 | 4939 | |
113cea80 | 4940 | r = wait_for_container(pid, &container_status); |
04d39279 LP |
4941 | pid = 0; |
4942 | ||
ec16945e | 4943 | if (r < 0) |
ce9f1527 LP |
4944 | /* We failed to wait for the container, or the |
4945 | * container exited abnormally */ | |
ec16945e LP |
4946 | goto finish; |
4947 | else if (r > 0 || container_status == CONTAINER_TERMINATED){ | |
ce9f1527 LP |
4948 | /* The container exited with a non-zero |
4949 | * status, or with zero status and no reboot | |
4950 | * was requested. */ | |
ec16945e | 4951 | ret = r; |
d87be9b0 | 4952 | break; |
ec16945e | 4953 | } |
88213476 | 4954 | |
113cea80 | 4955 | /* CONTAINER_REBOOTED, loop again */ |
ce38dbc8 LP |
4956 | |
4957 | if (arg_keep_unit) { | |
4958 | /* Special handling if we are running as a | |
4959 | * service: instead of simply restarting the | |
4960 | * machine we want to restart the entire | |
4961 | * service, so let's inform systemd about this | |
4962 | * with the special exit code 133. The service | |
4963 | * file uses RestartForceExitStatus=133 so | |
4964 | * that this results in a full nspawn | |
4965 | * restart. This is necessary since we might | |
4966 | * have cgroup parameters set we want to have | |
4967 | * flushed out. */ | |
ec16945e LP |
4968 | ret = 133; |
4969 | r = 0; | |
ce38dbc8 LP |
4970 | break; |
4971 | } | |
6d0b55c2 LP |
4972 | |
4973 | flush_ports(&exposed); | |
d87be9b0 | 4974 | } |
88213476 LP |
4975 | |
4976 | finish: | |
af4ec430 LP |
4977 | sd_notify(false, |
4978 | "STOPPING=1\n" | |
4979 | "STATUS=Terminating..."); | |
4980 | ||
9444b1f2 LP |
4981 | if (pid > 0) |
4982 | kill(pid, SIGKILL); | |
88213476 | 4983 | |
503546da LP |
4984 | /* Try to flush whatever is still queued in the pty */ |
4985 | if (master >= 0) | |
4986 | (void) copy_bytes(master, STDOUT_FILENO, (off_t) -1, false); | |
4987 | ||
03cfe0d5 LP |
4988 | loop_remove(loop_nr, &image_fd); |
4989 | ||
ec16945e LP |
4990 | if (remove_subvol && arg_directory) { |
4991 | int k; | |
4992 | ||
d9e2daaf | 4993 | k = btrfs_subvol_remove(arg_directory, true); |
ec16945e LP |
4994 | if (k < 0) |
4995 | log_warning_errno(k, "Cannot remove subvolume '%s', ignoring: %m", arg_directory); | |
4996 | } | |
4997 | ||
785890ac LP |
4998 | if (arg_machine) { |
4999 | const char *p; | |
5000 | ||
63c372cb | 5001 | p = strjoina("/run/systemd/nspawn/propagate/", arg_machine); |
c6878637 | 5002 | (void) rm_rf(p, REMOVE_ROOT); |
785890ac LP |
5003 | } |
5004 | ||
04d391da | 5005 | free(arg_directory); |
ec16945e LP |
5006 | free(arg_template); |
5007 | free(arg_image); | |
7027ff61 | 5008 | free(arg_machine); |
c74e630d LP |
5009 | free(arg_user); |
5010 | strv_free(arg_setenv); | |
5011 | strv_free(arg_network_interfaces); | |
5012 | strv_free(arg_network_macvlan); | |
4bbfe7ad | 5013 | strv_free(arg_network_ipvlan); |
5a8af538 | 5014 | custom_mount_free_all(); |
88213476 | 5015 | |
6d0b55c2 LP |
5016 | flush_ports(&exposed); |
5017 | ||
5018 | while (arg_expose_ports) { | |
5019 | ExposePort *p = arg_expose_ports; | |
5020 | LIST_REMOVE(ports, arg_expose_ports, p); | |
5021 | free(p); | |
5022 | } | |
5023 | ||
ec16945e | 5024 | return r < 0 ? EXIT_FAILURE : ret; |
88213476 | 5025 | } |