1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include "alloc-util.h"
5 #include "conf-parser.h"
6 #include "cpu-set-util.h"
7 #include "hostname-util.h"
8 #include "nspawn-network.h"
9 #include "nspawn-settings.h"
10 #include "parse-util.h"
11 #include "process-util.h"
12 #include "rlimit-util.h"
13 #include "socket-util.h"
14 #include "string-table.h"
15 #include "string-util.h"
17 #include "user-util.h"
20 Settings
*settings_new(void) {
28 .start_mode
= _START_MODE_INVALID
,
29 .personality
= PERSONALITY_INVALID
,
31 .resolv_conf
= _RESOLV_CONF_MODE_INVALID
,
32 .link_journal
= _LINK_JOURNAL_INVALID
,
33 .timezone
= _TIMEZONE_MODE_INVALID
,
35 .userns_mode
= _USER_NAMESPACE_MODE_INVALID
,
37 .uid_shift
= UID_INVALID
,
38 .uid_range
= UID_INVALID
,
40 .no_new_privileges
= -1,
43 .volatile_mode
= _VOLATILE_MODE_INVALID
,
45 .private_network
= -1,
48 .full_capabilities
= CAPABILITY_QUINTET_NULL
,
53 .console_mode
= _CONSOLE_MODE_INVALID
,
54 .console_width
= (unsigned) -1,
55 .console_height
= (unsigned) -1,
57 .clone_ns_flags
= (unsigned long) -1,
64 int settings_load(FILE *f
, const char *path
, Settings
**ret
) {
65 _cleanup_(settings_freep
) Settings
*s
= NULL
;
75 r
= config_parse(NULL
, path
, f
,
79 config_item_perf_lookup
, nspawn_gperf_lookup
,
85 /* Make sure that if userns_mode is set, userns_chown is set to something appropriate, and vice versa. Either
86 * both fields shall be initialized or neither. */
87 if (s
->userns_mode
== USER_NAMESPACE_PICK
)
88 s
->userns_chown
= true;
89 else if (s
->userns_mode
!= _USER_NAMESPACE_MODE_INVALID
&& s
->userns_chown
< 0)
90 s
->userns_chown
= false;
92 if (s
->userns_chown
>= 0 && s
->userns_mode
== _USER_NAMESPACE_MODE_INVALID
)
93 s
->userns_mode
= USER_NAMESPACE_NO
;
99 static void free_oci_hooks(OciHook
*h
, size_t n
) {
104 for (i
= 0; i
< n
; i
++) {
106 strv_free(h
[i
].args
);
113 void device_node_array_free(DeviceNode
*node
, size_t n
) {
116 for (i
= 0; i
< n
; i
++)
122 Settings
* settings_free(Settings
*s
) {
126 strv_free(s
->parameters
);
127 strv_free(s
->environment
);
129 free(s
->pivot_root_new
);
130 free(s
->pivot_root_old
);
131 free(s
->working_directory
);
132 strv_free(s
->syscall_whitelist
);
133 strv_free(s
->syscall_blacklist
);
134 rlimit_free_all(s
->rlimit
);
136 cpu_set_reset(&s
->cpu_set
);
138 strv_free(s
->network_interfaces
);
139 strv_free(s
->network_macvlan
);
140 strv_free(s
->network_ipvlan
);
141 strv_free(s
->network_veth_extra
);
142 free(s
->network_bridge
);
143 free(s
->network_zone
);
144 expose_port_free_all(s
->expose_ports
);
146 custom_mount_free_all(s
->custom_mounts
, s
->n_custom_mounts
);
151 free_oci_hooks(s
->oci_hooks_prestart
, s
->n_oci_hooks_prestart
);
152 free_oci_hooks(s
->oci_hooks_poststart
, s
->n_oci_hooks_poststart
);
153 free_oci_hooks(s
->oci_hooks_poststop
, s
->n_oci_hooks_poststop
);
156 sd_bus_message_unref(s
->properties
);
158 free(s
->supplementary_gids
);
159 device_node_array_free(s
->extra_nodes
, s
->n_extra_nodes
);
160 free(s
->network_namespace_path
);
162 strv_free(s
->sysctl
);
165 seccomp_release(s
->seccomp
);
171 bool settings_private_network(Settings
*s
) {
175 s
->private_network
> 0 ||
176 s
->network_veth
> 0 ||
179 s
->network_interfaces
||
180 s
->network_macvlan
||
182 s
->network_veth_extra
;
185 bool settings_network_veth(Settings
*s
) {
189 s
->network_veth
> 0 ||
194 int settings_allocate_properties(Settings
*s
) {
195 _cleanup_(sd_bus_unrefp
) sd_bus
*bus
= NULL
;
203 r
= sd_bus_default_system(&bus
);
207 r
= sd_bus_message_new(bus
, &s
->properties
, SD_BUS_MESSAGE_METHOD_CALL
);
214 DEFINE_CONFIG_PARSE_ENUM(config_parse_volatile_mode
, volatile_mode
, VolatileMode
, "Failed to parse volatile mode");
216 int config_parse_expose_port(
218 const char *filename
,
221 unsigned section_line
,
235 r
= expose_port_parse(&s
->expose_ports
, rvalue
);
237 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Duplicate port specification, ignoring: %s", rvalue
);
241 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse host port %s: %m", rvalue
);
248 int config_parse_capability(
250 const char *filename
,
253 unsigned section_line
,
260 uint64_t u
= 0, *result
= data
;
268 _cleanup_free_
char *word
= NULL
;
270 r
= extract_first_word(&rvalue
, &word
, NULL
, 0);
272 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to extract capability string, ignoring: %s", rvalue
);
278 r
= capability_from_name(word
);
280 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse capability, ignoring: %s", word
);
284 u
|= UINT64_C(1) << r
;
294 int config_parse_id128(
296 const char *filename
,
299 unsigned section_line
,
306 sd_id128_t t
, *result
= data
;
313 r
= sd_id128_from_string(rvalue
, &t
);
315 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse 128bit ID/UUID, ignoring: %s", rvalue
);
323 int config_parse_pivot_root(
325 const char *filename
,
328 unsigned section_line
,
335 Settings
*settings
= data
;
342 r
= pivot_root_parse(&settings
->pivot_root_new
, &settings
->pivot_root_old
, rvalue
);
344 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid pivot root mount specification %s: %m", rvalue
);
351 int config_parse_bind(
353 const char *filename
,
356 unsigned section_line
,
363 Settings
*settings
= data
;
370 r
= bind_mount_parse(&settings
->custom_mounts
, &settings
->n_custom_mounts
, rvalue
, ltype
);
372 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid bind mount specification %s: %m", rvalue
);
379 int config_parse_tmpfs(
381 const char *filename
,
384 unsigned section_line
,
391 Settings
*settings
= data
;
398 r
= tmpfs_mount_parse(&settings
->custom_mounts
, &settings
->n_custom_mounts
, rvalue
);
400 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid temporary file system specification %s: %m", rvalue
);
407 int config_parse_inaccessible(
409 const char *filename
,
412 unsigned section_line
,
419 Settings
*settings
= data
;
426 r
= inaccessible_mount_parse(&settings
->custom_mounts
, &settings
->n_custom_mounts
, rvalue
);
428 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid inaccessible file system specification %s: %m", rvalue
);
435 int config_parse_overlay(
437 const char *filename
,
440 unsigned section_line
,
447 Settings
*settings
= data
;
454 r
= overlay_mount_parse(&settings
->custom_mounts
, &settings
->n_custom_mounts
, rvalue
, ltype
);
456 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid overlay file system specification %s, ignoring: %m", rvalue
);
461 int config_parse_veth_extra(
463 const char *filename
,
466 unsigned section_line
,
473 Settings
*settings
= data
;
480 r
= veth_extra_parse(&settings
->network_veth_extra
, rvalue
);
482 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid extra virtual Ethernet link specification %s: %m", rvalue
);
489 int config_parse_network_zone(
491 const char *filename
,
494 unsigned section_line
,
501 Settings
*settings
= data
;
502 _cleanup_free_
char *j
= NULL
;
508 j
= strappend("vz-", rvalue
);
509 if (!ifname_valid(j
)) {
510 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Invalid network zone name, ignoring: %s", rvalue
);
514 free_and_replace(settings
->network_zone
, j
);
519 int config_parse_boot(
521 const char *filename
,
524 unsigned section_line
,
531 Settings
*settings
= data
;
538 r
= parse_boolean(rvalue
);
540 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse Boot= parameter %s, ignoring: %m", rvalue
);
545 if (settings
->start_mode
== START_PID2
)
548 settings
->start_mode
= START_BOOT
;
550 if (settings
->start_mode
== START_BOOT
)
553 if (settings
->start_mode
< 0)
554 settings
->start_mode
= START_PID1
;
560 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Conflicting Boot= or ProcessTwo= setting found. Ignoring.");
564 int config_parse_pid2(
566 const char *filename
,
569 unsigned section_line
,
576 Settings
*settings
= data
;
583 r
= parse_boolean(rvalue
);
585 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse ProcessTwo= parameter %s, ignoring: %m", rvalue
);
590 if (settings
->start_mode
== START_BOOT
)
593 settings
->start_mode
= START_PID2
;
595 if (settings
->start_mode
== START_PID2
)
598 if (settings
->start_mode
< 0)
599 settings
->start_mode
= START_PID1
;
605 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Conflicting Boot= or ProcessTwo= setting found. Ignoring.");
609 int config_parse_private_users(
611 const char *filename
,
614 unsigned section_line
,
621 Settings
*settings
= data
;
628 r
= parse_boolean(rvalue
);
630 /* no: User namespacing off */
631 settings
->userns_mode
= USER_NAMESPACE_NO
;
632 settings
->uid_shift
= UID_INVALID
;
633 settings
->uid_range
= UINT32_C(0x10000);
635 /* yes: User namespacing on, UID range is read from root dir */
636 settings
->userns_mode
= USER_NAMESPACE_FIXED
;
637 settings
->uid_shift
= UID_INVALID
;
638 settings
->uid_range
= UINT32_C(0x10000);
639 } else if (streq(rvalue
, "pick")) {
640 /* pick: User namespacing on, UID range is picked randomly */
641 settings
->userns_mode
= USER_NAMESPACE_PICK
;
642 settings
->uid_shift
= UID_INVALID
;
643 settings
->uid_range
= UINT32_C(0x10000);
645 const char *range
, *shift
;
648 /* anything else: User namespacing on, UID range is explicitly configured */
650 range
= strchr(rvalue
, ':');
652 shift
= strndupa(rvalue
, range
- rvalue
);
655 r
= safe_atou32(range
, &rn
);
656 if (r
< 0 || rn
<= 0) {
657 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "UID/GID range invalid, ignoring: %s", range
);
662 rn
= UINT32_C(0x10000);
665 r
= parse_uid(shift
, &sh
);
667 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "UID/GID shift invalid, ignoring: %s", range
);
671 settings
->userns_mode
= USER_NAMESPACE_FIXED
;
672 settings
->uid_shift
= sh
;
673 settings
->uid_range
= rn
;
679 int config_parse_syscall_filter(
681 const char *filename
,
684 unsigned section_line
,
691 Settings
*settings
= data
;
700 negative
= rvalue
[0] == '~';
701 items
= negative
? rvalue
+ 1 : rvalue
;
704 _cleanup_free_
char *word
= NULL
;
706 r
= extract_first_word(&items
, &word
, NULL
, 0);
712 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse SystemCallFilter= parameter %s, ignoring: %m", rvalue
);
717 r
= strv_extend(&settings
->syscall_blacklist
, word
);
719 r
= strv_extend(&settings
->syscall_whitelist
, word
);
727 int config_parse_hostname(
729 const char *filename
,
732 unsigned section_line
,
744 if (!hostname_is_valid(rvalue
, false)) {
745 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Invalid hostname, ignoring: %s", rvalue
);
749 if (free_and_strdup(s
, empty_to_null(rvalue
)) < 0)
755 int config_parse_oom_score_adjust(
757 const char *filename
,
760 unsigned section_line
,
767 Settings
*settings
= data
;
773 if (isempty(rvalue
)) {
774 settings
->oom_score_adjust_set
= false;
778 r
= parse_oom_score_adjust(rvalue
, &oa
);
780 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "OOM score adjust value out of range, ignoring: %s", rvalue
);
784 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse the OOM score adjust value, ignoring: %s", rvalue
);
788 settings
->oom_score_adjust
= oa
;
789 settings
->oom_score_adjust_set
= true;
794 int config_parse_cpu_affinity(
796 const char *filename
,
799 unsigned section_line
,
806 Settings
*settings
= data
;
811 return parse_cpu_set_extend(rvalue
, &settings
->cpu_set
, true, unit
, filename
, line
, lvalue
);
814 DEFINE_CONFIG_PARSE_ENUM(config_parse_resolv_conf
, resolv_conf_mode
, ResolvConfMode
, "Failed to parse resolv.conf mode");
816 static const char *const resolv_conf_mode_table
[_RESOLV_CONF_MODE_MAX
] = {
817 [RESOLV_CONF_OFF
] = "off",
818 [RESOLV_CONF_COPY_HOST
] = "copy-host",
819 [RESOLV_CONF_COPY_STATIC
] = "copy-static",
820 [RESOLV_CONF_BIND_HOST
] = "bind-host",
821 [RESOLV_CONF_BIND_STATIC
] = "bind-static",
822 [RESOLV_CONF_DELETE
] = "delete",
823 [RESOLV_CONF_AUTO
] = "auto",
826 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(resolv_conf_mode
, ResolvConfMode
, RESOLV_CONF_AUTO
);
828 int parse_link_journal(const char *s
, LinkJournal
*ret_mode
, bool *ret_try
) {
833 if (streq(s
, "auto")) {
834 *ret_mode
= LINK_AUTO
;
836 } else if (streq(s
, "no")) {
839 } else if (streq(s
, "guest")) {
840 *ret_mode
= LINK_GUEST
;
842 } else if (streq(s
, "host")) {
843 *ret_mode
= LINK_HOST
;
845 } else if (streq(s
, "try-guest")) {
846 *ret_mode
= LINK_GUEST
;
848 } else if (streq(s
, "try-host")) {
849 *ret_mode
= LINK_HOST
;
857 int config_parse_link_journal(
859 const char *filename
,
862 unsigned section_line
,
869 Settings
*settings
= data
;
875 r
= parse_link_journal(rvalue
, &settings
->link_journal
, &settings
->link_journal_try
);
877 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse link journal mode, ignoring: %s", rvalue
);
884 DEFINE_CONFIG_PARSE_ENUM(config_parse_timezone
, timezone_mode
, TimezoneMode
, "Failed to parse timezone mode");
886 static const char *const timezone_mode_table
[_TIMEZONE_MODE_MAX
] = {
887 [TIMEZONE_OFF
] = "off",
888 [TIMEZONE_COPY
] = "copy",
889 [TIMEZONE_BIND
] = "bind",
890 [TIMEZONE_SYMLINK
] = "symlink",
891 [TIMEZONE_DELETE
] = "delete",
892 [TIMEZONE_AUTO
] = "auto",
895 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(timezone_mode
, TimezoneMode
, TIMEZONE_AUTO
);