1 /* SPDX-License-Identifier: LGPL-2.1+ */
8 /* When we include libgen.h because we need dirname() we immediately
9 * undefine basename() since libgen.h defines it as a macro to the POSIX
10 * version which is really broken. We prefer GNU basename(). */
14 #include "alloc-util.h"
15 #include "bus-common-errors.h"
16 #include "bus-internal.h"
17 #include "bus-label.h"
23 #include "format-util.h"
25 #include "in-addr-util.h"
27 #include "local-addresses.h"
28 #include "machine-dbus.h"
30 #include "missing_capability.h"
33 #include "path-util.h"
34 #include "process-util.h"
35 #include "signal-util.h"
37 #include "terminal-util.h"
38 #include "tmpfile-util.h"
39 #include "user-util.h"
41 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class
, machine_class
, MachineClass
);
42 static BUS_DEFINE_PROPERTY_GET2(property_get_state
, "s", Machine
, machine_get_state
, machine_state_to_string
);
44 static int property_get_netif(
47 const char *interface
,
49 sd_bus_message
*reply
,
51 sd_bus_error
*error
) {
53 Machine
*m
= userdata
;
59 assert_cc(sizeof(int) == sizeof(int32_t));
61 return sd_bus_message_append_array(reply
, 'i', m
->netif
, m
->n_netif
* sizeof(int));
64 int bus_machine_method_terminate(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
65 Machine
*m
= userdata
;
71 r
= bus_verify_polkit_async(
74 "org.freedesktop.machine1.manage-machines",
78 &m
->manager
->polkit_registry
,
83 return 1; /* Will call us back */
89 return sd_bus_reply_method_return(message
, NULL
);
92 int bus_machine_method_kill(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
93 Machine
*m
= userdata
;
102 r
= sd_bus_message_read(message
, "si", &swho
, &signo
);
109 who
= kill_who_from_string(swho
);
111 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Invalid kill parameter '%s'", swho
);
114 if (!SIGNAL_VALID(signo
))
115 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Invalid signal %i", signo
);
117 r
= bus_verify_polkit_async(
120 "org.freedesktop.machine1.manage-machines",
124 &m
->manager
->polkit_registry
,
129 return 1; /* Will call us back */
131 r
= machine_kill(m
, who
, signo
);
135 return sd_bus_reply_method_return(message
, NULL
);
138 int bus_machine_method_get_addresses(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
139 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
140 Machine
*m
= userdata
;
146 r
= sd_bus_message_new_method_return(message
, &reply
);
150 r
= sd_bus_message_open_container(reply
, 'a', "(iay)");
157 _cleanup_free_
struct local_address
*addresses
= NULL
;
158 struct local_address
*a
;
161 n
= local_addresses(NULL
, 0, AF_UNSPEC
, &addresses
);
165 for (a
= addresses
, i
= 0; i
< n
; a
++, i
++) {
167 r
= sd_bus_message_open_container(reply
, 'r', "iay");
171 r
= sd_bus_message_append(reply
, "i", addresses
[i
].family
);
175 r
= sd_bus_message_append_array(reply
, 'y', &addresses
[i
].address
, FAMILY_ADDRESS_SIZE(addresses
[i
].family
));
179 r
= sd_bus_message_close_container(reply
);
187 case MACHINE_CONTAINER
: {
188 _cleanup_close_pair_
int pair
[2] = { -1, -1 };
189 _cleanup_free_
char *us
= NULL
, *them
= NULL
;
190 _cleanup_close_
int netns_fd
= -1;
194 r
= readlink_malloc("/proc/self/ns/net", &us
);
198 p
= procfs_file_alloca(m
->leader
, "ns/net");
199 r
= readlink_malloc(p
, &them
);
204 return sd_bus_error_setf(error
, BUS_ERROR_NO_PRIVATE_NETWORKING
, "Machine %s does not use private networking", m
->name
);
206 r
= namespace_open(m
->leader
, NULL
, NULL
, &netns_fd
, NULL
, NULL
);
210 if (socketpair(AF_UNIX
, SOCK_SEQPACKET
, 0, pair
) < 0)
213 r
= namespace_fork("(sd-addrns)", "(sd-addr)", NULL
, 0, FORK_RESET_SIGNALS
|FORK_DEATHSIG
,
214 -1, -1, netns_fd
, -1, -1, &child
);
216 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
218 _cleanup_free_
struct local_address
*addresses
= NULL
;
219 struct local_address
*a
;
222 pair
[0] = safe_close(pair
[0]);
224 n
= local_addresses(NULL
, 0, AF_UNSPEC
, &addresses
);
228 for (a
= addresses
, i
= 0; i
< n
; a
++, i
++) {
229 struct iovec iov
[2] = {
230 { .iov_base
= &a
->family
, .iov_len
= sizeof(a
->family
) },
231 { .iov_base
= &a
->address
, .iov_len
= FAMILY_ADDRESS_SIZE(a
->family
) },
234 r
= writev(pair
[1], iov
, 2);
239 pair
[1] = safe_close(pair
[1]);
244 pair
[1] = safe_close(pair
[1]);
249 union in_addr_union in_addr
;
256 iov
[0] = IOVEC_MAKE(&family
, sizeof(family
));
257 iov
[1] = IOVEC_MAKE(&in_addr
, sizeof(in_addr
));
259 n
= recvmsg(pair
[0], &mh
, 0);
262 if ((size_t) n
< sizeof(family
))
265 r
= sd_bus_message_open_container(reply
, 'r', "iay");
269 r
= sd_bus_message_append(reply
, "i", family
);
276 if (n
!= sizeof(struct in_addr
) + sizeof(family
))
279 r
= sd_bus_message_append_array(reply
, 'y', &in_addr
.in
, sizeof(in_addr
.in
));
283 if (n
!= sizeof(struct in6_addr
) + sizeof(family
))
286 r
= sd_bus_message_append_array(reply
, 'y', &in_addr
.in6
, sizeof(in_addr
.in6
));
292 r
= sd_bus_message_close_container(reply
);
297 r
= wait_for_terminate_and_check("(sd-addrns)", child
, 0);
299 return sd_bus_error_set_errnof(error
, r
, "Failed to wait for child: %m");
300 if (r
!= EXIT_SUCCESS
)
301 return sd_bus_error_setf(error
, SD_BUS_ERROR_FAILED
, "Child died abnormally.");
306 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Requesting IP address data is only supported on container machines.");
309 r
= sd_bus_message_close_container(reply
);
313 return sd_bus_send(NULL
, reply
, NULL
);
316 #define EXIT_NOT_FOUND 2
318 int bus_machine_method_get_os_release(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
319 _cleanup_strv_free_
char **l
= NULL
;
320 Machine
*m
= userdata
;
329 r
= load_os_release_pairs(NULL
, &l
);
335 case MACHINE_CONTAINER
: {
336 _cleanup_close_
int mntns_fd
= -1, root_fd
= -1, pidns_fd
= -1;
337 _cleanup_close_pair_
int pair
[2] = { -1, -1 };
338 _cleanup_fclose_
FILE *f
= NULL
;
341 r
= namespace_open(m
->leader
, &pidns_fd
, &mntns_fd
, NULL
, NULL
, &root_fd
);
345 if (socketpair(AF_UNIX
, SOCK_SEQPACKET
, 0, pair
) < 0)
348 r
= namespace_fork("(sd-osrelns)", "(sd-osrel)", NULL
, 0, FORK_RESET_SIGNALS
|FORK_DEATHSIG
,
349 pidns_fd
, mntns_fd
, -1, -1, root_fd
,
352 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
356 pair
[0] = safe_close(pair
[0]);
358 r
= open_os_release(NULL
, NULL
, &fd
);
360 _exit(EXIT_NOT_FOUND
);
364 r
= copy_bytes(fd
, pair
[1], (uint64_t) -1, 0);
371 pair
[1] = safe_close(pair
[1]);
373 f
= fdopen(pair
[0], "r");
379 r
= load_env_file_pairs(f
, "/etc/os-release", &l
);
383 r
= wait_for_terminate_and_check("(sd-osrelns)", child
, 0);
385 return sd_bus_error_set_errnof(error
, r
, "Failed to wait for child: %m");
386 if (r
== EXIT_NOT_FOUND
)
387 return sd_bus_error_setf(error
, SD_BUS_ERROR_FAILED
, "Machine does not contain OS release information");
388 if (r
!= EXIT_SUCCESS
)
389 return sd_bus_error_setf(error
, SD_BUS_ERROR_FAILED
, "Child died abnormally.");
395 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Requesting OS release data is only supported on container machines.");
398 return bus_reply_pair_array(message
, l
);
401 int bus_machine_method_open_pty(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
402 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
403 _cleanup_free_
char *pty_name
= NULL
;
404 _cleanup_close_
int master
= -1;
405 Machine
*m
= userdata
;
411 r
= bus_verify_polkit_async(
414 m
->class == MACHINE_HOST
? "org.freedesktop.machine1.host-open-pty" : "org.freedesktop.machine1.open-pty",
418 &m
->manager
->polkit_registry
,
423 return 1; /* Will call us back */
425 master
= machine_openpt(m
, O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
429 r
= ptsname_namespace(master
, &pty_name
);
433 r
= sd_bus_message_new_method_return(message
, &reply
);
437 r
= sd_bus_message_append(reply
, "hs", master
, pty_name
);
441 return sd_bus_send(NULL
, reply
, NULL
);
444 static int container_bus_new(Machine
*m
, sd_bus_error
*error
, sd_bus
**ret
) {
456 case MACHINE_CONTAINER
: {
457 _cleanup_(sd_bus_unrefp
) sd_bus
*bus
= NULL
;
460 r
= sd_bus_new(&bus
);
464 if (asprintf(&address
, "x-machine-kernel:pid=%1$" PID_PRI
";x-machine-unix:pid=%1$" PID_PRI
, m
->leader
) < 0)
467 bus
->address
= address
;
468 bus
->bus_client
= true;
469 bus
->trusted
= false;
470 bus
->is_system
= true;
472 r
= sd_bus_start(bus
);
474 return sd_bus_error_set_errnof(error
, r
, "There is no system bus in container %s.", m
->name
);
478 *ret
= TAKE_PTR(bus
);
489 int bus_machine_method_open_login(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
490 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
491 _cleanup_free_
char *pty_name
= NULL
;
492 _cleanup_(sd_bus_flush_close_unrefp
) sd_bus
*allocated_bus
= NULL
;
493 _cleanup_close_
int master
= -1;
494 sd_bus
*container_bus
= NULL
;
495 Machine
*m
= userdata
;
496 const char *p
, *getty
;
502 r
= bus_verify_polkit_async(
505 m
->class == MACHINE_HOST
? "org.freedesktop.machine1.host-login" : "org.freedesktop.machine1.login",
509 &m
->manager
->polkit_registry
,
514 return 1; /* Will call us back */
516 master
= machine_openpt(m
, O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
520 r
= ptsname_namespace(master
, &pty_name
);
524 p
= path_startswith(pty_name
, "/dev/pts/");
526 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "PTS name %s is invalid", pty_name
);
528 r
= container_bus_new(m
, error
, &allocated_bus
);
532 container_bus
= allocated_bus
?: m
->manager
->bus
;
534 getty
= strjoina("container-getty@", p
, ".service");
536 r
= sd_bus_call_method(
538 "org.freedesktop.systemd1",
539 "/org/freedesktop/systemd1",
540 "org.freedesktop.systemd1.Manager",
543 "ss", getty
, "replace");
547 r
= sd_bus_message_new_method_return(message
, &reply
);
551 r
= sd_bus_message_append(reply
, "hs", master
, pty_name
);
555 return sd_bus_send(NULL
, reply
, NULL
);
558 int bus_machine_method_open_shell(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
559 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
, *tm
= NULL
;
560 _cleanup_free_
char *pty_name
= NULL
;
561 _cleanup_(sd_bus_flush_close_unrefp
) sd_bus
*allocated_bus
= NULL
;
562 sd_bus
*container_bus
= NULL
;
563 _cleanup_close_
int master
= -1, slave
= -1;
564 _cleanup_strv_free_
char **env
= NULL
, **args_wire
= NULL
, **args
= NULL
;
565 Machine
*m
= userdata
;
566 const char *p
, *unit
, *user
, *path
, *description
, *utmp_id
;
572 r
= sd_bus_message_read(message
, "ss", &user
, &path
);
575 user
= empty_to_null(user
);
576 r
= sd_bus_message_read_strv(message
, &args_wire
);
582 args
= new0(char*, 3 + 1);
585 args
[0] = strdup("sh");
588 args
[1] = strdup("-c");
591 r
= asprintf(&args
[2],
592 "shell=$(getent passwd %s 2>/dev/null | { IFS=: read _ _ _ _ _ _ x; echo \"$x\"; })\n"\
593 "exec \"${shell:-/bin/sh}\" -l", /* -l is means --login */
594 isempty(user
) ? "root" : user
);
600 if (!path_is_absolute(path
))
601 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Specified path '%s' is not absolute", path
);
602 args
= TAKE_PTR(args_wire
);
603 if (strv_isempty(args
)) {
604 args
= strv_free(args
);
606 args
= strv_new(path
);
612 r
= sd_bus_message_read_strv(message
, &env
);
615 if (!strv_env_is_valid(env
))
616 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Invalid environment assignments");
618 r
= bus_verify_polkit_async(
621 m
->class == MACHINE_HOST
? "org.freedesktop.machine1.host-shell" : "org.freedesktop.machine1.shell",
625 &m
->manager
->polkit_registry
,
630 return 1; /* Will call us back */
632 master
= machine_openpt(m
, O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
636 r
= ptsname_namespace(master
, &pty_name
);
640 p
= path_startswith(pty_name
, "/dev/pts/");
643 slave
= machine_open_terminal(m
, pty_name
, O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
647 utmp_id
= path_startswith(pty_name
, "/dev/");
650 r
= container_bus_new(m
, error
, &allocated_bus
);
654 container_bus
= allocated_bus
?: m
->manager
->bus
;
656 r
= sd_bus_message_new_method_call(
659 "org.freedesktop.systemd1",
660 "/org/freedesktop/systemd1",
661 "org.freedesktop.systemd1.Manager",
662 "StartTransientUnit");
667 unit
= strjoina("container-shell@", p
, ".service");
668 r
= sd_bus_message_append(tm
, "ss", unit
, "fail");
673 r
= sd_bus_message_open_container(tm
, 'a', "(sv)");
677 description
= strjoina("Shell for User ", isempty(user
) ? "root" : user
);
678 r
= sd_bus_message_append(tm
,
679 "(sv)(sv)(sv)(sv)(sv)(sv)(sv)(sv)(sv)(sv)(sv)(sv)",
680 "Description", "s", description
,
681 "StandardInputFileDescriptor", "h", slave
,
682 "StandardOutputFileDescriptor", "h", slave
,
683 "StandardErrorFileDescriptor", "h", slave
,
684 "SendSIGHUP", "b", true,
685 "IgnoreSIGPIPE", "b", false,
686 "KillMode", "s", "mixed",
687 "TTYReset", "b", true,
688 "UtmpIdentifier", "s", utmp_id
,
689 "UtmpMode", "s", "user",
690 "PAMName", "s", "login",
691 "WorkingDirectory", "s", "-~");
695 r
= sd_bus_message_append(tm
, "(sv)", "User", "s", isempty(user
) ? "root" : user
);
699 if (!strv_isempty(env
)) {
700 r
= sd_bus_message_open_container(tm
, 'r', "sv");
704 r
= sd_bus_message_append(tm
, "s", "Environment");
708 r
= sd_bus_message_open_container(tm
, 'v', "as");
712 r
= sd_bus_message_append_strv(tm
, env
);
716 r
= sd_bus_message_close_container(tm
);
720 r
= sd_bus_message_close_container(tm
);
726 r
= sd_bus_message_open_container(tm
, 'r', "sv");
730 r
= sd_bus_message_append(tm
, "s", "ExecStart");
734 r
= sd_bus_message_open_container(tm
, 'v', "a(sasb)");
738 r
= sd_bus_message_open_container(tm
, 'a', "(sasb)");
742 r
= sd_bus_message_open_container(tm
, 'r', "sasb");
746 r
= sd_bus_message_append(tm
, "s", path
);
750 r
= sd_bus_message_append_strv(tm
, args
);
754 r
= sd_bus_message_append(tm
, "b", true);
758 r
= sd_bus_message_close_container(tm
);
762 r
= sd_bus_message_close_container(tm
);
766 r
= sd_bus_message_close_container(tm
);
770 r
= sd_bus_message_close_container(tm
);
774 r
= sd_bus_message_close_container(tm
);
778 /* Auxiliary units */
779 r
= sd_bus_message_append(tm
, "a(sa(sv))", 0);
783 r
= sd_bus_call(container_bus
, tm
, 0, error
, NULL
);
787 slave
= safe_close(slave
);
789 r
= sd_bus_message_new_method_return(message
, &reply
);
793 r
= sd_bus_message_append(reply
, "hs", master
, pty_name
);
797 return sd_bus_send(NULL
, reply
, NULL
);
800 int bus_machine_method_bind_mount(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
801 _cleanup_close_pair_
int errno_pipe_fd
[2] = { -1, -1 };
802 char mount_slave
[] = "/tmp/propagate.XXXXXX", *mount_tmp
, *mount_outside
, *p
;
803 bool mount_slave_created
= false, mount_slave_mounted
= false,
804 mount_tmp_created
= false, mount_tmp_mounted
= false,
805 mount_outside_created
= false, mount_outside_mounted
= false;
806 _cleanup_free_
char *chased_src
= NULL
;
807 int read_only
, make_file_or_directory
;
808 const char *dest
, *src
;
809 Machine
*m
= userdata
;
818 if (m
->class != MACHINE_CONTAINER
)
819 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Bind mounting is only supported on container machines.");
821 r
= sd_bus_message_read(message
, "ssbb", &src
, &dest
, &read_only
, &make_file_or_directory
);
825 if (!path_is_absolute(src
) || !path_is_normalized(src
))
826 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Source path must be absolute and not contain ../.");
830 else if (!path_is_absolute(dest
) || !path_is_normalized(dest
))
831 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Destination path must be absolute and not contain ../.");
833 r
= bus_verify_polkit_async(
836 "org.freedesktop.machine1.manage-machines",
840 &m
->manager
->polkit_registry
,
845 return 1; /* Will call us back */
847 r
= machine_get_uid_shift(m
, &uid
);
851 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Can't bind mount on container with user namespacing applied.");
853 /* One day, when bind mounting /proc/self/fd/n works across
854 * namespace boundaries we should rework this logic to make
857 p
= strjoina("/run/systemd/nspawn/propagate/", m
->name
, "/");
858 if (laccess(p
, F_OK
) < 0)
859 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Container does not allow propagation of mount points.");
861 r
= chase_symlinks(src
, NULL
, CHASE_TRAIL_SLASH
, &chased_src
);
863 return sd_bus_error_set_errnof(error
, r
, "Failed to resolve source path: %m");
865 if (lstat(chased_src
, &st
) < 0)
866 return sd_bus_error_set_errnof(error
, errno
, "Failed to stat() source path: %m");
867 if (S_ISLNK(st
.st_mode
)) /* This shouldn't really happen, given that we just chased the symlinks above, but let's better be safe… */
868 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Source directory can't be a symbolic link");
870 /* Our goal is to install a new bind mount into the container,
871 possibly read-only. This is irritatingly complex
872 unfortunately, currently.
874 First, we start by creating a private playground in /tmp,
875 that we can mount MS_SLAVE. (Which is necessary, since
876 MS_MOVE cannot be applied to mounts with MS_SHARED parent
879 if (!mkdtemp(mount_slave
))
880 return sd_bus_error_set_errnof(error
, errno
, "Failed to create playground %s: %m", mount_slave
);
882 mount_slave_created
= true;
884 if (mount(mount_slave
, mount_slave
, NULL
, MS_BIND
, NULL
) < 0) {
885 r
= sd_bus_error_set_errnof(error
, errno
, "Failed to make bind mount %s: %m", mount_slave
);
889 mount_slave_mounted
= true;
891 if (mount(NULL
, mount_slave
, NULL
, MS_SLAVE
, NULL
) < 0) {
892 r
= sd_bus_error_set_errnof(error
, errno
, "Failed to remount slave %s: %m", mount_slave
);
896 /* Second, we mount the source file or directory to a directory inside of our MS_SLAVE playground. */
897 mount_tmp
= strjoina(mount_slave
, "/mount");
898 if (S_ISDIR(st
.st_mode
))
899 r
= mkdir_errno_wrapper(mount_tmp
, 0700);
901 r
= touch(mount_tmp
);
903 sd_bus_error_set_errnof(error
, errno
, "Failed to create temporary mount point %s: %m", mount_tmp
);
907 mount_tmp_created
= true;
909 if (mount(chased_src
, mount_tmp
, NULL
, MS_BIND
, NULL
) < 0) {
910 r
= sd_bus_error_set_errnof(error
, errno
, "Failed to mount %s: %m", chased_src
);
914 mount_tmp_mounted
= true;
916 /* Third, we remount the new bind mount read-only if requested. */
918 if (mount(NULL
, mount_tmp
, NULL
, MS_BIND
|MS_REMOUNT
|MS_RDONLY
, NULL
) < 0) {
919 r
= sd_bus_error_set_errnof(error
, errno
, "Failed to remount read-only %s: %m", mount_tmp
);
923 /* Fourth, we move the new bind mount into the propagation directory. This way it will appear there read-only
926 mount_outside
= strjoina("/run/systemd/nspawn/propagate/", m
->name
, "/XXXXXX");
927 if (S_ISDIR(st
.st_mode
))
928 r
= mkdtemp(mount_outside
) ? 0 : -errno
;
930 r
= mkostemp_safe(mount_outside
);
934 sd_bus_error_set_errnof(error
, errno
, "Cannot create propagation file or directory %s: %m", mount_outside
);
938 mount_outside_created
= true;
940 if (mount(mount_tmp
, mount_outside
, NULL
, MS_MOVE
, NULL
) < 0) {
941 r
= sd_bus_error_set_errnof(error
, errno
, "Failed to move %s to %s: %m", mount_tmp
, mount_outside
);
945 mount_outside_mounted
= true;
946 mount_tmp_mounted
= false;
948 if (S_ISDIR(st
.st_mode
))
949 (void) rmdir(mount_tmp
);
951 (void) unlink(mount_tmp
);
952 mount_tmp_created
= false;
954 (void) umount(mount_slave
);
955 mount_slave_mounted
= false;
957 (void) rmdir(mount_slave
);
958 mount_slave_created
= false;
960 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0) {
961 r
= sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
965 r
= safe_fork("(sd-bindmnt)", FORK_RESET_SIGNALS
, &child
);
967 sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
971 const char *mount_inside
;
975 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
977 q
= procfs_file_alloca(m
->leader
, "ns/mnt");
978 mntfd
= open(q
, O_RDONLY
|O_NOCTTY
|O_CLOEXEC
);
980 r
= log_error_errno(errno
, "Failed to open mount namespace of leader: %m");
984 if (setns(mntfd
, CLONE_NEWNS
) < 0) {
985 r
= log_error_errno(errno
, "Failed to join namespace of leader: %m");
989 if (make_file_or_directory
) {
990 if (S_ISDIR(st
.st_mode
))
991 (void) mkdir_p(dest
, 0755);
993 (void) mkdir_parents(dest
, 0755);
994 safe_close(open(dest
, O_CREAT
|O_EXCL
|O_WRONLY
|O_CLOEXEC
|O_NOCTTY
, 0600));
998 /* Fifth, move the mount to the right place inside */
999 mount_inside
= strjoina("/run/systemd/nspawn/incoming/", basename(mount_outside
));
1000 if (mount(mount_inside
, dest
, NULL
, MS_MOVE
, NULL
) < 0) {
1001 r
= log_error_errno(errno
, "Failed to mount: %m");
1005 _exit(EXIT_SUCCESS
);
1008 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
1009 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
1011 _exit(EXIT_FAILURE
);
1014 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
1016 r
= wait_for_terminate_and_check("(sd-bindmnt)", child
, 0);
1018 r
= sd_bus_error_set_errnof(error
, r
, "Failed to wait for child: %m");
1021 if (r
!= EXIT_SUCCESS
) {
1022 if (read(errno_pipe_fd
[0], &r
, sizeof(r
)) == sizeof(r
))
1023 r
= sd_bus_error_set_errnof(error
, r
, "Failed to mount: %m");
1025 r
= sd_bus_error_setf(error
, SD_BUS_ERROR_FAILED
, "Child failed.");
1029 r
= sd_bus_reply_method_return(message
, NULL
);
1032 if (mount_outside_mounted
)
1033 (void) umount(mount_outside
);
1034 if (mount_outside_created
) {
1035 if (S_ISDIR(st
.st_mode
))
1036 (void) rmdir(mount_outside
);
1038 (void) unlink(mount_outside
);
1041 if (mount_tmp_mounted
)
1042 (void) umount(mount_tmp
);
1043 if (mount_tmp_created
) {
1044 if (S_ISDIR(st
.st_mode
))
1045 (void) rmdir(mount_tmp
);
1047 (void) unlink(mount_tmp
);
1050 if (mount_slave_mounted
)
1051 (void) umount(mount_slave
);
1052 if (mount_slave_created
)
1053 (void) rmdir(mount_slave
);
1058 int bus_machine_method_copy(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
1059 const char *src
, *dest
, *host_path
, *container_path
, *host_basename
, *container_basename
, *container_dirname
;
1060 _cleanup_close_pair_
int errno_pipe_fd
[2] = { -1, -1 };
1061 CopyFlags copy_flags
= COPY_REFLINK
|COPY_MERGE
;
1062 _cleanup_close_
int hostfd
= -1;
1063 Machine
*m
= userdata
;
1073 if (m
->manager
->n_operations
>= OPERATIONS_MAX
)
1074 return sd_bus_error_setf(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing copies.");
1076 if (m
->class != MACHINE_CONTAINER
)
1077 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Copying files is only supported on container machines.");
1079 r
= sd_bus_message_read(message
, "ss", &src
, &dest
);
1083 if (!path_is_absolute(src
))
1084 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Source path must be absolute.");
1088 else if (!path_is_absolute(dest
))
1089 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Destination path must be absolute.");
1091 r
= bus_verify_polkit_async(
1094 "org.freedesktop.machine1.manage-machines",
1098 &m
->manager
->polkit_registry
,
1103 return 1; /* Will call us back */
1105 r
= machine_get_uid_shift(m
, &uid_shift
);
1109 copy_from
= strstr(sd_bus_message_get_member(message
), "CopyFrom");
1112 container_path
= src
;
1116 container_path
= dest
;
1119 host_basename
= basename(host_path
);
1121 container_basename
= basename(container_path
);
1122 t
= strdupa(container_path
);
1123 container_dirname
= dirname(t
);
1125 hostfd
= open_parent(host_path
, O_CLOEXEC
, 0);
1127 return sd_bus_error_set_errnof(error
, hostfd
, "Failed to open host directory %s: %m", host_path
);
1129 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1130 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
1132 r
= safe_fork("(sd-copy)", FORK_RESET_SIGNALS
, &child
);
1134 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
1140 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
1142 q
= procfs_file_alloca(m
->leader
, "ns/mnt");
1143 mntfd
= open(q
, O_RDONLY
|O_NOCTTY
|O_CLOEXEC
);
1145 r
= log_error_errno(errno
, "Failed to open mount namespace of leader: %m");
1149 if (setns(mntfd
, CLONE_NEWNS
) < 0) {
1150 r
= log_error_errno(errno
, "Failed to join namespace of leader: %m");
1154 containerfd
= open(container_dirname
, O_CLOEXEC
|O_RDONLY
|O_NOCTTY
|O_DIRECTORY
);
1155 if (containerfd
< 0) {
1156 r
= log_error_errno(errno
, "Failed to open destination directory: %m");
1160 /* Run the actual copy operation. Note that when an UID shift is set we'll either clamp the UID/GID to
1161 * 0 or to the actual UID shift depending on the direction we copy. If no UID shift is set we'll copy
1162 * the UID/GIDs as they are. */
1164 r
= copy_tree_at(containerfd
, container_basename
, hostfd
, host_basename
, uid_shift
== 0 ? UID_INVALID
: 0, uid_shift
== 0 ? GID_INVALID
: 0, copy_flags
);
1166 r
= copy_tree_at(hostfd
, host_basename
, containerfd
, container_basename
, uid_shift
== 0 ? UID_INVALID
: uid_shift
, uid_shift
== 0 ? GID_INVALID
: uid_shift
, copy_flags
);
1168 hostfd
= safe_close(hostfd
);
1169 containerfd
= safe_close(containerfd
);
1172 r
= log_error_errno(r
, "Failed to copy tree: %m");
1176 _exit(EXIT_SUCCESS
);
1179 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
1180 _exit(EXIT_FAILURE
);
1183 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
1185 /* Copying might take a while, hence install a watch on the child, and return */
1187 r
= operation_new(m
->manager
, m
, child
, message
, errno_pipe_fd
[0], NULL
);
1189 (void) sigkill_wait(child
);
1192 errno_pipe_fd
[0] = -1;
1197 int bus_machine_method_open_root_directory(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
1198 _cleanup_close_
int fd
= -1;
1199 Machine
*m
= userdata
;
1205 r
= bus_verify_polkit_async(
1208 "org.freedesktop.machine1.manage-machines",
1212 &m
->manager
->polkit_registry
,
1217 return 1; /* Will call us back */
1222 fd
= open("/", O_RDONLY
|O_CLOEXEC
|O_DIRECTORY
);
1228 case MACHINE_CONTAINER
: {
1229 _cleanup_close_
int mntns_fd
= -1, root_fd
= -1;
1230 _cleanup_close_pair_
int pair
[2] = { -1, -1 };
1233 r
= namespace_open(m
->leader
, NULL
, &mntns_fd
, NULL
, NULL
, &root_fd
);
1237 if (socketpair(AF_UNIX
, SOCK_DGRAM
, 0, pair
) < 0)
1240 r
= namespace_fork("(sd-openrootns)", "(sd-openroot)", NULL
, 0, FORK_RESET_SIGNALS
|FORK_DEATHSIG
,
1241 -1, mntns_fd
, -1, -1, root_fd
, &child
);
1243 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
1245 _cleanup_close_
int dfd
= -1;
1247 pair
[0] = safe_close(pair
[0]);
1249 dfd
= open("/", O_RDONLY
|O_CLOEXEC
|O_DIRECTORY
);
1251 _exit(EXIT_FAILURE
);
1253 r
= send_one_fd(pair
[1], dfd
, 0);
1254 dfd
= safe_close(dfd
);
1256 _exit(EXIT_FAILURE
);
1258 _exit(EXIT_SUCCESS
);
1261 pair
[1] = safe_close(pair
[1]);
1263 r
= wait_for_terminate_and_check("(sd-openrootns)", child
, 0);
1265 return sd_bus_error_set_errnof(error
, r
, "Failed to wait for child: %m");
1266 if (r
!= EXIT_SUCCESS
)
1267 return sd_bus_error_setf(error
, SD_BUS_ERROR_FAILED
, "Child died abnormally.");
1269 fd
= receive_one_fd(pair
[0], MSG_DONTWAIT
);
1277 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Opening the root directory is only supported on container machines.");
1280 return sd_bus_reply_method_return(message
, "h", fd
);
1283 int bus_machine_method_get_uid_shift(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
1284 Machine
*m
= userdata
;
1291 /* You wonder why this is a method and not a property? Well, properties are not supposed to return errors, but
1292 * we kinda have to for this. */
1294 if (m
->class == MACHINE_HOST
)
1295 return sd_bus_reply_method_return(message
, "u", UINT32_C(0));
1297 if (m
->class != MACHINE_CONTAINER
)
1298 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "UID/GID shift may only be determined for container machines.");
1300 r
= machine_get_uid_shift(m
, &shift
);
1302 return sd_bus_error_setf(error
, SD_BUS_ERROR_NOT_SUPPORTED
, "Machine %s uses a complex UID/GID mapping, cannot determine shift", m
->name
);
1306 return sd_bus_reply_method_return(message
, "u", (uint32_t) shift
);
1309 const sd_bus_vtable machine_vtable
[] = {
1310 SD_BUS_VTABLE_START(0),
1311 SD_BUS_PROPERTY("Name", "s", NULL
, offsetof(Machine
, name
), SD_BUS_VTABLE_PROPERTY_CONST
),
1312 SD_BUS_PROPERTY("Id", "ay", bus_property_get_id128
, offsetof(Machine
, id
), SD_BUS_VTABLE_PROPERTY_CONST
),
1313 BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Machine
, timestamp
), SD_BUS_VTABLE_PROPERTY_CONST
),
1314 SD_BUS_PROPERTY("Service", "s", NULL
, offsetof(Machine
, service
), SD_BUS_VTABLE_PROPERTY_CONST
),
1315 SD_BUS_PROPERTY("Unit", "s", NULL
, offsetof(Machine
, unit
), SD_BUS_VTABLE_PROPERTY_CONST
),
1316 SD_BUS_PROPERTY("Scope", "s", NULL
, offsetof(Machine
, unit
), SD_BUS_VTABLE_PROPERTY_CONST
|SD_BUS_VTABLE_HIDDEN
),
1317 SD_BUS_PROPERTY("Leader", "u", NULL
, offsetof(Machine
, leader
), SD_BUS_VTABLE_PROPERTY_CONST
),
1318 SD_BUS_PROPERTY("Class", "s", property_get_class
, offsetof(Machine
, class), SD_BUS_VTABLE_PROPERTY_CONST
),
1319 SD_BUS_PROPERTY("RootDirectory", "s", NULL
, offsetof(Machine
, root_directory
), SD_BUS_VTABLE_PROPERTY_CONST
),
1320 SD_BUS_PROPERTY("NetworkInterfaces", "ai", property_get_netif
, 0, SD_BUS_VTABLE_PROPERTY_CONST
),
1321 SD_BUS_PROPERTY("State", "s", property_get_state
, 0, 0),
1322 SD_BUS_METHOD("Terminate", NULL
, NULL
, bus_machine_method_terminate
, SD_BUS_VTABLE_UNPRIVILEGED
),
1323 SD_BUS_METHOD("Kill", "si", NULL
, bus_machine_method_kill
, SD_BUS_VTABLE_UNPRIVILEGED
),
1324 SD_BUS_METHOD("GetAddresses", NULL
, "a(iay)", bus_machine_method_get_addresses
, SD_BUS_VTABLE_UNPRIVILEGED
),
1325 SD_BUS_METHOD("GetOSRelease", NULL
, "a{ss}", bus_machine_method_get_os_release
, SD_BUS_VTABLE_UNPRIVILEGED
),
1326 SD_BUS_METHOD("GetUIDShift", NULL
, "u", bus_machine_method_get_uid_shift
, SD_BUS_VTABLE_UNPRIVILEGED
),
1327 SD_BUS_METHOD("OpenPTY", NULL
, "hs", bus_machine_method_open_pty
, SD_BUS_VTABLE_UNPRIVILEGED
),
1328 SD_BUS_METHOD("OpenLogin", NULL
, "hs", bus_machine_method_open_login
, SD_BUS_VTABLE_UNPRIVILEGED
),
1329 SD_BUS_METHOD("OpenShell", "ssasas", "hs", bus_machine_method_open_shell
, SD_BUS_VTABLE_UNPRIVILEGED
),
1330 SD_BUS_METHOD("BindMount", "ssbb", NULL
, bus_machine_method_bind_mount
, SD_BUS_VTABLE_UNPRIVILEGED
),
1331 SD_BUS_METHOD("CopyFrom", "ss", NULL
, bus_machine_method_copy
, SD_BUS_VTABLE_UNPRIVILEGED
),
1332 SD_BUS_METHOD("CopyTo", "ss", NULL
, bus_machine_method_copy
, SD_BUS_VTABLE_UNPRIVILEGED
),
1333 SD_BUS_METHOD("OpenRootDirectory", NULL
, "h", bus_machine_method_open_root_directory
, SD_BUS_VTABLE_UNPRIVILEGED
),
1337 int machine_object_find(sd_bus
*bus
, const char *path
, const char *interface
, void *userdata
, void **found
, sd_bus_error
*error
) {
1338 Manager
*m
= userdata
;
1348 if (streq(path
, "/org/freedesktop/machine1/machine/self")) {
1349 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
1350 sd_bus_message
*message
;
1353 message
= sd_bus_get_current_message(bus
);
1357 r
= sd_bus_query_sender_creds(message
, SD_BUS_CREDS_PID
, &creds
);
1361 r
= sd_bus_creds_get_pid(creds
, &pid
);
1365 r
= manager_get_machine_by_pid(m
, pid
, &machine
);
1369 _cleanup_free_
char *e
= NULL
;
1372 p
= startswith(path
, "/org/freedesktop/machine1/machine/");
1376 e
= bus_label_unescape(p
);
1380 machine
= hashmap_get(m
->machines
, e
);
1389 char *machine_bus_path(Machine
*m
) {
1390 _cleanup_free_
char *e
= NULL
;
1394 e
= bus_label_escape(m
->name
);
1398 return strappend("/org/freedesktop/machine1/machine/", e
);
1401 int machine_node_enumerator(sd_bus
*bus
, const char *path
, void *userdata
, char ***nodes
, sd_bus_error
*error
) {
1402 _cleanup_strv_free_
char **l
= NULL
;
1403 Machine
*machine
= NULL
;
1404 Manager
*m
= userdata
;
1412 HASHMAP_FOREACH(machine
, m
->machines
, i
) {
1415 p
= machine_bus_path(machine
);
1419 r
= strv_consume(&l
, p
);
1424 *nodes
= TAKE_PTR(l
);
1429 int machine_send_signal(Machine
*m
, bool new_machine
) {
1430 _cleanup_free_
char *p
= NULL
;
1434 p
= machine_bus_path(m
);
1438 return sd_bus_emit_signal(
1440 "/org/freedesktop/machine1",
1441 "org.freedesktop.machine1.Manager",
1442 new_machine
? "MachineNew" : "MachineRemoved",
1446 int machine_send_create_reply(Machine
*m
, sd_bus_error
*error
) {
1447 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*c
= NULL
;
1448 _cleanup_free_
char *p
= NULL
;
1452 if (!m
->create_message
)
1455 c
= TAKE_PTR(m
->create_message
);
1458 return sd_bus_reply_method_error(c
, error
);
1460 /* Update the machine state file before we notify the client
1461 * about the result. */
1464 p
= machine_bus_path(m
);
1468 return sd_bus_reply_method_return(c
, "o", p
);