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-rw-r--r--src/machine/machine-dbus.c92
-rw-r--r--src/machine/machine-dbus.h1
-rw-r--r--src/machine/machined-dbus.c21
3 files changed, 114 insertions, 0 deletions
diff --git a/src/machine/machine-dbus.c b/src/machine/machine-dbus.c
index ab54d9e934..5121bfdd18 100644
--- a/src/machine/machine-dbus.c
+++ b/src/machine/machine-dbus.c
@@ -1274,6 +1274,97 @@ int bus_machine_method_copy(sd_bus_message *message, void *userdata, sd_bus_erro
return 1;
}
+int bus_machine_method_open_root_directory(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_close_ int fd = -1;
+ Machine *m = userdata;
+ int r;
+
+ assert(message);
+ assert(m);
+
+ r = bus_verify_polkit_async(
+ message,
+ CAP_SYS_ADMIN,
+ "org.freedesktop.machine1.manage-machines",
+ NULL,
+ false,
+ UID_INVALID,
+ &m->manager->polkit_registry,
+ error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* Will call us back */
+
+ switch (m->class) {
+
+ case MACHINE_HOST:
+ fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
+ if (fd < 0)
+ return -errno;
+
+ break;
+
+ case MACHINE_CONTAINER: {
+ _cleanup_close_ int mntns_fd = -1, root_fd = -1;
+ _cleanup_close_pair_ int pair[2] = { -1, -1 };
+ siginfo_t si;
+ pid_t child;
+
+ r = namespace_open(m->leader, NULL, &mntns_fd, NULL, NULL, &root_fd);
+ if (r < 0)
+ return r;
+
+ if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0)
+ return -errno;
+
+ child = fork();
+ if (child < 0)
+ return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
+
+ if (child == 0) {
+ _cleanup_close_ int dfd = -1;
+
+ pair[0] = safe_close(pair[0]);
+
+ r = namespace_enter(-1, mntns_fd, -1, -1, root_fd);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ dfd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
+ if (dfd < 0)
+ _exit(EXIT_FAILURE);
+
+ r = send_one_fd(pair[1], dfd, 0);
+ dfd = safe_close(dfd);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ pair[1] = safe_close(pair[1]);
+
+ r = wait_for_terminate(child, &si);
+ if (r < 0)
+ return sd_bus_error_set_errnof(error, r, "Failed to wait for child: %m");
+ if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Child died abnormally.");
+
+ fd = receive_one_fd(pair[0], MSG_DONTWAIT);
+ if (fd < 0)
+ return fd;
+
+ break;
+ }
+
+ default:
+ return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Opening the root directory is only supported on container machines.");
+ }
+
+ return sd_bus_reply_method_return(message, "h", fd);
+}
+
const sd_bus_vtable machine_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("Name", "s", NULL, offsetof(Machine, name), SD_BUS_VTABLE_PROPERTY_CONST),
@@ -1297,6 +1388,7 @@ const sd_bus_vtable machine_vtable[] = {
SD_BUS_METHOD("BindMount", "ssbb", NULL, bus_machine_method_bind_mount, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CopyFrom", "ss", NULL, bus_machine_method_copy, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CopyTo", "ss", NULL, bus_machine_method_copy, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("OpenRootDirectory", NULL, "h", bus_machine_method_open_root_directory, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END
};
diff --git a/src/machine/machine-dbus.h b/src/machine/machine-dbus.h
index 3a8162b171..241b23c7ec 100644
--- a/src/machine/machine-dbus.h
+++ b/src/machine/machine-dbus.h
@@ -38,6 +38,7 @@ int bus_machine_method_open_login(sd_bus_message *message, void *userdata, sd_bu
int bus_machine_method_open_shell(sd_bus_message *message, void *userdata, sd_bus_error *error);
int bus_machine_method_bind_mount(sd_bus_message *message, void *userdata, sd_bus_error *error);
int bus_machine_method_copy(sd_bus_message *message, void *userdata, sd_bus_error *error);
+int bus_machine_method_open_root_directory(sd_bus_message *message, void *userdata, sd_bus_error *error);
int machine_send_signal(Machine *m, bool new_machine);
int machine_send_create_reply(Machine *m, sd_bus_error *error);
diff --git a/src/machine/machined-dbus.c b/src/machine/machined-dbus.c
index c9639c3cf2..31efa3695b 100644
--- a/src/machine/machined-dbus.c
+++ b/src/machine/machined-dbus.c
@@ -706,6 +706,26 @@ static int method_copy_machine(sd_bus_message *message, void *userdata, sd_bus_e
return bus_machine_method_copy(message, machine, error);
}
+static int method_open_machine_root_directory(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Manager *m = userdata;
+ Machine *machine;
+ const char *name;
+ int r;
+
+ assert(message);
+ assert(m);
+
+ r = sd_bus_message_read(message, "s", &name);
+ if (r < 0)
+ return r;
+
+ machine = hashmap_get(m->machines, name);
+ if (!machine)
+ return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
+
+ return bus_machine_method_open_root_directory(message, machine, error);
+}
+
static int method_remove_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_(image_unrefp) Image* i = NULL;
const char *name;
@@ -1225,6 +1245,7 @@ const sd_bus_vtable manager_vtable[] = {
SD_BUS_METHOD("BindMountMachine", "sssbb", NULL, method_bind_mount_machine, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CopyFromMachine", "sss", NULL, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CopyToMachine", "sss", NULL, method_copy_machine, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("OpenMachineRootDirectory", "s", "h", method_open_machine_root_directory, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("RemoveImage", "s", NULL, method_remove_image, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("RenameImage", "ss", NULL, method_rename_image, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CloneImage", "ssb", NULL, method_clone_image, SD_BUS_VTABLE_UNPRIVILEGED),