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Systemd/src/machine/machined-dbus.c

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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "sd-id128.h"
#include "alloc-util.h"
#include "btrfs-util.h"
#include "bus-common-errors.h"
#include "bus-util.h"
#include "cgroup-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "format-util.h"
#include "hostname-util.h"
#include "image-dbus.h"
#include "io-util.h"
#include "machine-dbus.h"
#include "machine-image.h"
#include "machine-pool.h"
#include "machined.h"
#include "path-util.h"
#include "process-util.h"
#include "stdio-util.h"
#include "strv.h"
#include "unit-name.h"
#include "user-util.h"
static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_pool_path, "s", "/var/lib/machines");
static int property_get_pool_usage(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
_cleanup_close_ int fd = -1;
uint64_t usage = (uint64_t) -1;
assert(bus);
assert(reply);
fd = open("/var/lib/machines", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
if (fd >= 0) {
BtrfsQuotaInfo q;
if (btrfs_subvol_get_subtree_quota_fd(fd, 0, &q) >= 0)
usage = q.referenced;
}
return sd_bus_message_append(reply, "t", usage);
}
static int property_get_pool_limit(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
_cleanup_close_ int fd = -1;
uint64_t size = (uint64_t) -1;
assert(bus);
assert(reply);
fd = open("/var/lib/machines", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
if (fd >= 0) {
BtrfsQuotaInfo q;
if (btrfs_subvol_get_subtree_quota_fd(fd, 0, &q) >= 0)
size = q.referenced_max;
}
return sd_bus_message_append(reply, "t", size);
}
static int method_get_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_free_ char *p = NULL;
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);
p = machine_bus_path(machine);
if (!p)
return -ENOMEM;
return sd_bus_reply_method_return(message, "o", p);
}
static int method_get_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_free_ char *p = NULL;
Manager *m = userdata;
const char *name;
int r;
assert(message);
assert(m);
r = sd_bus_message_read(message, "s", &name);
if (r < 0)
return r;
r = image_find(IMAGE_MACHINE, name, NULL);
if (r == -ENOENT)
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name);
if (r < 0)
return r;
p = image_bus_path(name);
if (!p)
return -ENOMEM;
return sd_bus_reply_method_return(message, "o", p);
}
static int method_get_machine_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_free_ char *p = NULL;
Manager *m = userdata;
Machine *machine = NULL;
pid_t pid;
int r;
assert(message);
assert(m);
assert_cc(sizeof(pid_t) == sizeof(uint32_t));
r = sd_bus_message_read(message, "u", &pid);
if (r < 0)
return r;
if (pid < 0)
return -EINVAL;
if (pid == 0) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
if (r < 0)
return r;
r = sd_bus_creds_get_pid(creds, &pid);
if (r < 0)
return r;
}
r = manager_get_machine_by_pid(m, pid, &machine);
if (r < 0)
return r;
if (!machine)
return sd_bus_error_setf(error, BUS_ERROR_NO_MACHINE_FOR_PID, "PID "PID_FMT" does not belong to any known machine", pid);
p = machine_bus_path(machine);
if (!p)
return -ENOMEM;
return sd_bus_reply_method_return(message, "o", p);
}
static int method_list_machines(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
Manager *m = userdata;
Machine *machine;
Iterator i;
int r;
assert(message);
assert(m);
r = sd_bus_message_new_method_return(message, &reply);
if (r < 0)
return sd_bus_error_set_errno(error, r);
r = sd_bus_message_open_container(reply, 'a', "(ssso)");
if (r < 0)
return sd_bus_error_set_errno(error, r);
HASHMAP_FOREACH(machine, m->machines, i) {
_cleanup_free_ char *p = NULL;
p = machine_bus_path(machine);
if (!p)
return -ENOMEM;
r = sd_bus_message_append(reply, "(ssso)",
machine->name,
strempty(machine_class_to_string(machine->class)),
machine->service,
p);
if (r < 0)
return sd_bus_error_set_errno(error, r);
}
r = sd_bus_message_close_container(reply);
if (r < 0)
return sd_bus_error_set_errno(error, r);
return sd_bus_send(NULL, reply, NULL);
}
static int method_create_or_register_machine(Manager *manager, sd_bus_message *message, bool read_network, Machine **_m, sd_bus_error *error) {
const char *name, *service, *class, *root_directory;
const int32_t *netif = NULL;
MachineClass c;
uint32_t leader;
sd_id128_t id;
const void *v;
Machine *m;
size_t n, n_netif = 0;
int r;
assert(manager);
assert(message);
assert(_m);
r = sd_bus_message_read(message, "s", &name);
if (r < 0)
return r;
if (!machine_name_is_valid(name))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine name");
r = sd_bus_message_read_array(message, 'y', &v, &n);
if (r < 0)
return r;
if (n == 0)
id = SD_ID128_NULL;
else if (n == 16)
memcpy(&id, v, n);
else
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine ID parameter");
r = sd_bus_message_read(message, "ssus", &service, &class, &leader, &root_directory);
if (r < 0)
return r;
if (read_network) {
size_t i;
r = sd_bus_message_read_array(message, 'i', (const void**) &netif, &n_netif);
if (r < 0)
return r;
n_netif /= sizeof(int32_t);
for (i = 0; i < n_netif; i++) {
if (netif[i] <= 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid network interface index %i", netif[i]);
}
}
if (isempty(class))
c = _MACHINE_CLASS_INVALID;
else {
c = machine_class_from_string(class);
if (c < 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid machine class parameter");
}
if (leader == 1)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
if (!isempty(root_directory) && !path_is_absolute(root_directory))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root directory must be empty or an absolute path");
if (leader == 0) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
if (r < 0)
return r;
assert_cc(sizeof(uint32_t) == sizeof(pid_t));
r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
if (r < 0)
return r;
}
if (hashmap_get(manager->machines, name))
return sd_bus_error_setf(error, BUS_ERROR_MACHINE_EXISTS, "Machine '%s' already exists", name);
r = manager_add_machine(manager, name, &m);
if (r < 0)
return r;
m->leader = leader;
m->class = c;
m->id = id;
if (!isempty(service)) {
m->service = strdup(service);
if (!m->service) {
r = -ENOMEM;
goto fail;
}
}
if (!isempty(root_directory)) {
m->root_directory = strdup(root_directory);
if (!m->root_directory) {
r = -ENOMEM;
goto fail;
}
}
if (n_netif > 0) {
assert_cc(sizeof(int32_t) == sizeof(int));
m->netif = memdup(netif, sizeof(int32_t) * n_netif);
if (!m->netif) {
r = -ENOMEM;
goto fail;
}
m->n_netif = n_netif;
}
*_m = m;
return 1;
fail:
machine_add_to_gc_queue(m);
return r;
}
static int method_create_machine_internal(sd_bus_message *message, bool read_network, void *userdata, sd_bus_error *error) {
Manager *manager = userdata;
Machine *m = NULL;
int r;
assert(message);
assert(manager);
r = method_create_or_register_machine(manager, message, read_network, &m, error);
if (r < 0)
return r;
r = sd_bus_message_enter_container(message, 'a', "(sv)");
if (r < 0)
goto fail;
r = machine_start(m, message, error);
if (r < 0)
goto fail;
m->create_message = sd_bus_message_ref(message);
return 1;
fail:
machine_add_to_gc_queue(m);
return r;
}
static int method_create_machine_with_network(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return method_create_machine_internal(message, true, userdata, error);
}
static int method_create_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return method_create_machine_internal(message, false, userdata, error);
}
static int method_register_machine_internal(sd_bus_message *message, bool read_network, void *userdata, sd_bus_error *error) {
Manager *manager = userdata;
_cleanup_free_ char *p = NULL;
Machine *m = NULL;
int r;
assert(message);
assert(manager);
r = method_create_or_register_machine(manager, message, read_network, &m, error);
if (r < 0)
return r;
r = cg_pid_get_unit(m->leader, &m->unit);
if (r < 0) {
r = sd_bus_error_set_errnof(error, r,
"Failed to determine unit of process "PID_FMT" : %m",
m->leader);
goto fail;
}
r = machine_start(m, NULL, error);
if (r < 0)
goto fail;
p = machine_bus_path(m);
if (!p) {
r = -ENOMEM;
goto fail;
}
return sd_bus_reply_method_return(message, "o", p);
fail:
machine_add_to_gc_queue(m);
return r;
}
static int method_register_machine_with_network(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return method_register_machine_internal(message, true, userdata, error);
}
static int method_register_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return method_register_machine_internal(message, false, userdata, error);
}
static int redirect_method_to_machine(sd_bus_message *message, Manager *m, sd_bus_error *error, sd_bus_message_handler_t method) {
Machine *machine;
const char *name;
int r;
assert(message);
assert(m);
assert(method);
r = sd_bus_message_read(message, "s", &name);
if (r < 0)
return sd_bus_error_set_errno(error, 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 method(message, machine, error);
}
static int method_terminate_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_terminate);
}
static int method_kill_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_kill);
}
static int method_get_machine_addresses(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_addresses);
}
static int method_get_machine_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_os_release);
}
static int method_list_images(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
_cleanup_(image_hashmap_freep) Hashmap *images = NULL;
Manager *m = userdata;
Image *image;
Iterator i;
int r;
assert(message);
assert(m);
images = hashmap_new(&string_hash_ops);
if (!images)
return -ENOMEM;
r = image_discover(IMAGE_MACHINE, images);
if (r < 0)
return r;
r = sd_bus_message_new_method_return(message, &reply);
if (r < 0)
return r;
r = sd_bus_message_open_container(reply, 'a', "(ssbttto)");
if (r < 0)
return r;
HASHMAP_FOREACH(image, images, i) {
_cleanup_free_ char *p = NULL;
p = image_bus_path(image->name);
if (!p)
return -ENOMEM;
r = sd_bus_message_append(reply, "(ssbttto)",
image->name,
image_type_to_string(image->type),
image->read_only,
image->crtime,
image->mtime,
image->usage,
p);
if (r < 0)
return r;
}
r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
return sd_bus_send(NULL, reply, NULL);
}
static int method_open_machine_pty(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_pty);
}
static int method_open_machine_login(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_login);
}
static int method_open_machine_shell(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_shell);
}
static int method_bind_mount_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_bind_mount);
}
static int method_copy_machine(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_copy);
}
static int method_open_machine_root_directory(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_open_root_directory);
}
static int method_get_machine_uid_shift(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_machine(message, userdata, error, bus_machine_method_get_uid_shift);
}
static int redirect_method_to_image(sd_bus_message *message, Manager *m, sd_bus_error *error, sd_bus_message_handler_t method) {
_cleanup_(image_unrefp) Image* i = NULL;
const char *name;
int r;
assert(message);
assert(m);
assert(method);
r = sd_bus_message_read(message, "s", &name);
if (r < 0)
return r;
if (!image_name_is_valid(name))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", name);
r = image_find(IMAGE_MACHINE, name, &i);
if (r == -ENOENT)
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name);
if (r < 0)
return r;
i->userdata = m;
return method(message, i, error);
}
static int method_remove_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_remove);
}
static int method_rename_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_rename);
}
static int method_clone_image(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_clone);
}
static int method_mark_image_read_only(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_mark_read_only);
}
static int method_get_image_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_get_hostname);
}
static int method_get_image_machine_id(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_get_machine_id);
}
static int method_get_image_machine_info(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_get_machine_info);
}
static int method_get_image_os_release(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_get_os_release);
}
static int clean_pool_done(Operation *operation, int ret, sd_bus_error *error) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
_cleanup_fclose_ FILE *f = NULL;
bool success;
size_t n;
int r;
assert(operation);
assert(operation->extra_fd >= 0);
if (lseek(operation->extra_fd, 0, SEEK_SET) == (off_t) -1)
return -errno;
f = fdopen(operation->extra_fd, "re");
if (!f)
return -errno;
operation->extra_fd = -1;
/* The resulting temporary file starts with a boolean value that indicates success or not. */
errno = 0;
n = fread(&success, 1, sizeof(success), f);
if (n != sizeof(success))
return ret < 0 ? ret : (errno != 0 ? -errno : -EIO);
if (ret < 0) {
_cleanup_free_ char *name = NULL;
/* The clean-up operation failed. In this case the resulting temporary file should contain a boolean
* set to false followed by the name of the failed image. Let's try to read this and use it for the
* error message. If we can't read it, don't mind, and return the naked error. */
if (success) /* The resulting temporary file could not be updated, ignore it. */
return ret;
r = read_nul_string(f, &name);
if (r < 0 || isempty(name)) /* Same here... */
return ret;
return sd_bus_error_set_errnof(error, ret, "Failed to remove image %s: %m", name);
}
assert(success);
r = sd_bus_message_new_method_return(operation->message, &reply);
if (r < 0)
return r;
r = sd_bus_message_open_container(reply, 'a', "(st)");
if (r < 0)
return r;
/* On success the resulting temporary file will contain a list of image names that were removed followed by
* their size on disk. Let's read that and turn it into a bus message. */
for (;;) {
_cleanup_free_ char *name = NULL;
uint64_t size;
r = read_nul_string(f, &name);
if (r < 0)
return r;
if (isempty(name)) /* reached the end */
break;
errno = 0;
n = fread(&size, 1, sizeof(size), f);
if (n != sizeof(size))
return errno != 0 ? -errno : -EIO;
r = sd_bus_message_append(reply, "(st)", name, size);
if (r < 0)
return r;
}
r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
return sd_bus_send(NULL, reply, NULL);
}
static int method_clean_pool(sd_bus_message *message, void *userdata, sd_bus_error *error) {
enum {
REMOVE_ALL,
REMOVE_HIDDEN,
} mode;
_cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
_cleanup_close_ int result_fd = -1;
Manager *m = userdata;
Operation *operation;
const char *mm;
pid_t child;
int r;
assert(message);
if (m->n_operations >= OPERATIONS_MAX)
return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
r = sd_bus_message_read(message, "s", &mm);
if (r < 0)
return r;
if (streq(mm, "all"))
mode = REMOVE_ALL;
else if (streq(mm, "hidden"))
mode = REMOVE_HIDDEN;
else
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown mode '%s'.", mm);
r = bus_verify_polkit_async(
message,
CAP_SYS_ADMIN,
"org.freedesktop.machine1.manage-machines",
NULL,
false,
UID_INVALID,
&m->polkit_registry,
error);
if (r < 0)
return r;
if (r == 0)
return 1; /* Will call us back */
if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
/* Create a temporary file we can dump information about deleted images into. We use a temporary file for this
* instead of a pipe or so, since this might grow quit large in theory and we don't want to process this
* continuously */
result_fd = open_tmpfile_unlinkable(NULL, O_RDWR|O_CLOEXEC);
if (result_fd < 0)
return -errno;
/* This might be a slow operation, run it asynchronously in a background process */
r = safe_fork("(sd-clean)", FORK_RESET_SIGNALS, &child);
if (r < 0)
return sd_bus_error_set_errnof(error, r, "Failed to fork(): %m");
if (r == 0) {
_cleanup_(image_hashmap_freep) Hashmap *images = NULL;
bool success = true;
Image *image;
Iterator i;
ssize_t l;
errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
images = hashmap_new(&string_hash_ops);
if (!images) {
r = -ENOMEM;
goto child_fail;
}
r = image_discover(IMAGE_MACHINE, images);
if (r < 0)
goto child_fail;
l = write(result_fd, &success, sizeof(success));
if (l < 0) {
r = -errno;
goto child_fail;
}
HASHMAP_FOREACH(image, images, i) {
/* We can't remove vendor images (i.e. those in /usr) */
if (IMAGE_IS_VENDOR(image))
continue;
if (IMAGE_IS_HOST(image))
continue;
if (mode == REMOVE_HIDDEN && !IMAGE_IS_HIDDEN(image))
continue;
r = image_remove(image);
if (r == -EBUSY) /* keep images that are currently being used. */
continue;
if (r < 0) {
/* If the operation failed, let's override everything we wrote, and instead write there at which image we failed. */
success = false;
(void) ftruncate(result_fd, 0);
(void) lseek(result_fd, 0, SEEK_SET);
(void) write(result_fd, &success, sizeof(success));
(void) write(result_fd, image->name, strlen(image->name)+1);
goto child_fail;
}
l = write(result_fd, image->name, strlen(image->name)+1);
if (l < 0) {
r = -errno;
goto child_fail;
}
l = write(result_fd, &image->usage_exclusive, sizeof(image->usage_exclusive));
if (l < 0) {
r = -errno;
goto child_fail;
}
}
result_fd = safe_close(result_fd);
_exit(EXIT_SUCCESS);
child_fail:
(void) write(errno_pipe_fd[1], &r, sizeof(r));
_exit(EXIT_FAILURE);
}
errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
/* The clean-up might take a while, hence install a watch on the child and return */
r = operation_new(m, NULL, child, message, errno_pipe_fd[0], &operation);
if (r < 0) {
(void) sigkill_wait(child);
return r;
}
operation->extra_fd = result_fd;
operation->done = clean_pool_done;
result_fd = -1;
errno_pipe_fd[0] = -1;
return 1;
}
static int method_set_pool_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
Manager *m = userdata;
uint64_t limit;
int r;
assert(message);
r = sd_bus_message_read(message, "t", &limit);
if (r < 0)
return r;
if (!FILE_SIZE_VALID_OR_INFINITY(limit))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "New limit out of range");
r = bus_verify_polkit_async(
message,
CAP_SYS_ADMIN,
"org.freedesktop.machine1.manage-machines",
NULL,
false,
UID_INVALID,
&m->polkit_registry,
error);
if (r < 0)
return r;
if (r == 0)
return 1; /* Will call us back */
/* Set up the machine directory if necessary */
r = setup_machine_directory(error);
if (r < 0)
return r;
(void) btrfs_qgroup_set_limit("/var/lib/machines", 0, limit);
r = btrfs_subvol_set_subtree_quota_limit("/var/lib/machines", 0, limit);
if (r == -ENOTTY)
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Quota is only supported on btrfs.");
if (r < 0)
return sd_bus_error_set_errnof(error, r, "Failed to adjust quota limit: %m");
return sd_bus_reply_method_return(message, NULL);
}
static int method_set_image_limit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
return redirect_method_to_image(message, userdata, error, bus_image_method_set_limit);
}
static int method_map_from_machine_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_fclose_ FILE *f = NULL;
Manager *m = userdata;
const char *name, *p;
Machine *machine;
uint32_t uid;
int r;
r = sd_bus_message_read(message, "su", &name, &uid);
if (r < 0)
return r;
if (!uid_is_valid(uid))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
machine = hashmap_get(m->machines, name);
if (!machine)
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
if (machine->class != MACHINE_CONTAINER)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Not supported for non-container machines.");
p = procfs_file_alloca(machine->leader, "uid_map");
f = fopen(p, "re");
if (!f)
return -errno;
for (;;) {
uid_t uid_base, uid_shift, uid_range, converted;
int k;
errno = 0;
k = fscanf(f, UID_FMT " " UID_FMT " " UID_FMT, &uid_base, &uid_shift, &uid_range);
if (k < 0 && feof(f))
break;
if (k != 3) {
if (ferror(f) && errno > 0)
return -errno;
return -EIO;
}
if (uid < uid_base || uid >= uid_base + uid_range)
continue;
converted = uid - uid_base + uid_shift;
if (!uid_is_valid(converted))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
return sd_bus_reply_method_return(message, "u", (uint32_t) converted);
}
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "Machine '%s' has no matching user mappings.", name);
}
static int method_map_to_machine_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
Manager *m = userdata;
Machine *machine;
uid_t uid;
Iterator i;
int r;
r = sd_bus_message_read(message, "u", &uid);
if (r < 0)
return r;
if (!uid_is_valid(uid))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
if (uid < 0x10000)
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "User " UID_FMT " belongs to host UID range", uid);
HASHMAP_FOREACH(machine, m->machines, i) {
_cleanup_fclose_ FILE *f = NULL;
char p[STRLEN("/proc//uid_map") + DECIMAL_STR_MAX(pid_t) + 1];
if (machine->class != MACHINE_CONTAINER)
continue;
xsprintf(p, "/proc/" UID_FMT "/uid_map", machine->leader);
f = fopen(p, "re");
if (!f) {
log_warning_errno(errno, "Failed to open %s, ignoring,", p);
continue;
}
for (;;) {
_cleanup_free_ char *o = NULL;
uid_t uid_base, uid_shift, uid_range, converted;
int k;
errno = 0;
k = fscanf(f, UID_FMT " " UID_FMT " " UID_FMT, &uid_base, &uid_shift, &uid_range);
if (k < 0 && feof(f))
break;
if (k != 3) {
if (ferror(f) && errno > 0)
return -errno;
return -EIO;
}
/* The private user namespace is disabled, ignoring. */
if (uid_shift == 0)
continue;
if (uid < uid_shift || uid >= uid_shift + uid_range)
continue;
converted = (uid - uid_shift + uid_base);
if (!uid_is_valid(converted))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid user ID " UID_FMT, uid);
o = machine_bus_path(machine);
if (!o)
return -ENOMEM;
return sd_bus_reply_method_return(message, "sou", machine->name, o, (uint32_t) converted);
}
}
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER_MAPPING, "No matching user mapping for " UID_FMT ".", uid);
}
static int method_map_from_machine_group(sd_bus_message *message, void *groupdata, sd_bus_error *error) {
_cleanup_fclose_ FILE *f = NULL;
Manager *m = groupdata;
const char *name, *p;
Machine *machine;
uint32_t gid;
int r;
r = sd_bus_message_read(message, "su", &name, &gid);
if (r < 0)
return r;
if (!gid_is_valid(gid))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
machine = hashmap_get(m->machines, name);
if (!machine)
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_MACHINE, "No machine '%s' known", name);
if (machine->class != MACHINE_CONTAINER)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Not supported for non-container machines.");
p = procfs_file_alloca(machine->leader, "gid_map");
f = fopen(p, "re");
if (!f)
return -errno;
for (;;) {
gid_t gid_base, gid_shift, gid_range, converted;
int k;
errno = 0;
k = fscanf(f, GID_FMT " " GID_FMT " " GID_FMT, &gid_base, &gid_shift, &gid_range);
if (k < 0 && feof(f))
break;
if (k != 3) {
if (ferror(f) && errno > 0)
return -errno;
return -EIO;
}
if (gid < gid_base || gid >= gid_base + gid_range)
continue;
converted = gid - gid_base + gid_shift;
if (!gid_is_valid(converted))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
return sd_bus_reply_method_return(message, "u", (uint32_t) converted);
}
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "Machine '%s' has no matching group mappings.", name);
}
static int method_map_to_machine_group(sd_bus_message *message, void *groupdata, sd_bus_error *error) {
Manager *m = groupdata;
Machine *machine;
gid_t gid;
Iterator i;
int r;
r = sd_bus_message_read(message, "u", &gid);
if (r < 0)
return r;
if (!gid_is_valid(gid))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
if (gid < 0x10000)
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "Group " GID_FMT " belongs to host GID range", gid);
HASHMAP_FOREACH(machine, m->machines, i) {
_cleanup_fclose_ FILE *f = NULL;
char p[STRLEN("/proc//gid_map") + DECIMAL_STR_MAX(pid_t) + 1];
if (machine->class != MACHINE_CONTAINER)
continue;
xsprintf(p, "/proc/" GID_FMT "/gid_map", machine->leader);
f = fopen(p, "re");
if (!f) {
log_warning_errno(errno, "Failed to open %s, ignoring,", p);
continue;
}
for (;;) {
_cleanup_free_ char *o = NULL;
gid_t gid_base, gid_shift, gid_range, converted;
int k;
errno = 0;
k = fscanf(f, GID_FMT " " GID_FMT " " GID_FMT, &gid_base, &gid_shift, &gid_range);
if (k < 0 && feof(f))
break;
if (k != 3) {
if (ferror(f) && errno > 0)
return -errno;
return -EIO;
}
/* The private user namespace is disabled, ignoring. */
if (gid_shift == 0)
continue;
if (gid < gid_shift || gid >= gid_shift + gid_range)
continue;
converted = (gid - gid_shift + gid_base);
if (!gid_is_valid(converted))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid group ID " GID_FMT, gid);
o = machine_bus_path(machine);
if (!o)
return -ENOMEM;
return sd_bus_reply_method_return(message, "sou", machine->name, o, (uint32_t) converted);
}
}
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_GROUP_MAPPING, "No matching group mapping for " GID_FMT ".", gid);
}
const sd_bus_vtable manager_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("PoolPath", "s", property_get_pool_path, 0, 0),
SD_BUS_PROPERTY("PoolUsage", "t", property_get_pool_usage, 0, 0),
SD_BUS_PROPERTY("PoolLimit", "t", property_get_pool_limit, 0, 0),
SD_BUS_METHOD("GetMachine", "s", "o", method_get_machine, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetImage", "s", "o", method_get_image, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetMachineByPID", "u", "o", method_get_machine_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ListMachines", NULL, "a(ssso)", method_list_machines, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ListImages", NULL, "a(ssbttto)", method_list_images, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CreateMachine", "sayssusa(sv)", "o", method_create_machine, 0),
SD_BUS_METHOD("CreateMachineWithNetwork", "sayssusaia(sv)", "o", method_create_machine_with_network, 0),
SD_BUS_METHOD("RegisterMachine", "sayssus", "o", method_register_machine, 0),
SD_BUS_METHOD("RegisterMachineWithNetwork", "sayssusai", "o", method_register_machine_with_network, 0),
SD_BUS_METHOD("TerminateMachine", "s", NULL, method_terminate_machine, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("KillMachine", "ssi", NULL, method_kill_machine, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetMachineAddresses", "s", "a(iay)", method_get_machine_addresses, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetMachineOSRelease", "s", "a{ss}", method_get_machine_os_release, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("OpenMachinePTY", "s", "hs", method_open_machine_pty, 0),
SD_BUS_METHOD("OpenMachineLogin", "s", "hs", method_open_machine_login, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("OpenMachineShell", "sssasas", "hs", method_open_machine_shell, SD_BUS_VTABLE_UNPRIVILEGED),
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("GetMachineUIDShift", "s", "u", method_get_machine_uid_shift, 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),
SD_BUS_METHOD("MarkImageReadOnly", "sb", NULL, method_mark_image_read_only, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetImageHostname", "s", "s", method_get_image_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetImageMachineID", "s", "ay", method_get_image_machine_id, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetImageMachineInfo", "s", "a{ss}", method_get_image_machine_info, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("GetImageOSRelease", "s", "a{ss}", method_get_image_os_release, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("SetPoolLimit", "t", NULL, method_set_pool_limit, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("SetImageLimit", "st", NULL, method_set_image_limit, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("CleanPool", "s", "a(st)", method_clean_pool, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("MapFromMachineUser", "su", "u", method_map_from_machine_user, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("MapToMachineUser", "u", "sou", method_map_to_machine_user, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("MapFromMachineGroup", "su", "u", method_map_from_machine_group, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("MapToMachineGroup", "u", "sou", method_map_to_machine_group, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_SIGNAL("MachineNew", "so", 0),
SD_BUS_SIGNAL("MachineRemoved", "so", 0),
SD_BUS_VTABLE_END
};
int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
const char *path, *result, *unit;
Manager *m = userdata;
Machine *machine;
uint32_t id;
int r;
assert(message);
assert(m);
r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
if (r < 0) {
bus_log_parse_error(r);
return 0;
}
machine = hashmap_get(m->machine_units, unit);
if (!machine)
return 0;
if (streq_ptr(path, machine->scope_job)) {
machine->scope_job = mfree(machine->scope_job);
if (machine->started) {
if (streq(result, "done"))
machine_send_create_reply(machine, NULL);
else {
_cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
machine_send_create_reply(machine, &e);
}
}
machine_save(machine);
}
machine_add_to_gc_queue(machine);
return 0;
}
int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_free_ char *unit = NULL;
const char *path;
Manager *m = userdata;
Machine *machine;
int r;
assert(message);
assert(m);
path = sd_bus_message_get_path(message);
if (!path)
return 0;
r = unit_name_from_dbus_path(path, &unit);
if (r == -EINVAL) /* not for a unit */
return 0;
if (r < 0) {
log_oom();
return 0;
}
machine = hashmap_get(m->machine_units, unit);
if (!machine)
return 0;
machine_add_to_gc_queue(machine);
return 0;
}
int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
const char *path, *unit;
Manager *m = userdata;
Machine *machine;
int r;
assert(message);
assert(m);
r = sd_bus_message_read(message, "so", &unit, &path);
if (r < 0) {
bus_log_parse_error(r);
return 0;
}
machine = hashmap_get(m->machine_units, unit);
if (!machine)
return 0;
machine_add_to_gc_queue(machine);
return 0;
}
int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
Manager *m = userdata;
Machine *machine;
Iterator i;
int b, r;
assert(message);
assert(m);
r = sd_bus_message_read(message, "b", &b);
if (r < 0) {
bus_log_parse_error(r);
return 0;
}
if (b)
return 0;
/* systemd finished reloading, let's recheck all our machines */
log_debug("System manager has been reloaded, rechecking machines...");
HASHMAP_FOREACH(machine, m->machines, i)
machine_add_to_gc_queue(machine);
return 0;
}
int manager_start_scope(
Manager *manager,
const char *scope,
pid_t pid,
const char *slice,
const char *description,
sd_bus_message *more_properties,
sd_bus_error *error,
char **job) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
int r;
assert(manager);
assert(scope);
assert(pid > 1);
r = sd_bus_message_new_method_call(
manager->bus,
&m,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"StartTransientUnit");
if (r < 0)
return r;
r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
if (r < 0)
return r;
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return r;
if (!isempty(slice)) {
r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
if (r < 0)
return r;
}
if (!isempty(description)) {
r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
if (r < 0)
return r;
}
r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)(sv)",
"PIDs", "au", 1, pid,
"Delegate", "b", 1,
"CollectMode", "s", "inactive-or-failed",
"AddRef", "b", 1,
"TasksMax", "t", UINT64_C(16384));
if (r < 0)
return r;
if (more_properties) {
r = sd_bus_message_copy(m, more_properties, true);
if (r < 0)
return r;
}
r = sd_bus_message_close_container(m);
if (r < 0)
return r;
r = sd_bus_message_append(m, "a(sa(sv))", 0);
if (r < 0)
return r;
r = sd_bus_call(manager->bus, m, 0, error, &reply);
if (r < 0)
return r;
if (job) {
const char *j;
char *copy;
r = sd_bus_message_read(reply, "o", &j);
if (r < 0)
return r;
copy = strdup(j);
if (!copy)
return -ENOMEM;
*job = copy;
}
return 1;
}
int manager_unref_unit(
Manager *m,
const char *unit,
sd_bus_error *error) {
assert(m);
assert(unit);
return sd_bus_call_method(
m->bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"UnrefUnit",
error,
NULL,
"s",
unit);
}
int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
int r;
assert(manager);
assert(unit);
r = sd_bus_call_method(
manager->bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"StopUnit",
error,
&reply,
"ss", unit, "fail");
if (r < 0) {
if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
if (job)
*job = NULL;
sd_bus_error_free(error);
return 0;
}
return r;
}
if (job) {
const char *j;
char *copy;
r = sd_bus_message_read(reply, "o", &j);
if (r < 0)
return r;
copy = strdup(j);
if (!copy)
return -ENOMEM;
*job = copy;
}
return 1;
}
int manager_kill_unit(Manager *manager, const char *unit, int signo, sd_bus_error *error) {
assert(manager);
assert(unit);
return sd_bus_call_method(
manager->bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"KillUnit",
error,
NULL,
"ssi", unit, "all", signo);
}
int manager_unit_is_active(Manager *manager, const char *unit) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
_cleanup_free_ char *path = NULL;
const char *state;
int r;
assert(manager);
assert(unit);
path = unit_dbus_path_from_name(unit);
if (!path)
return -ENOMEM;
r = sd_bus_get_property(
manager->bus,
"org.freedesktop.systemd1",
path,
"org.freedesktop.systemd1.Unit",
"ActiveState",
&error,
&reply,
"s");
if (r < 0) {
if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
return true;
if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
return false;
return r;
}
r = sd_bus_message_read(reply, "s", &state);
if (r < 0)
return -EINVAL;
return !STR_IN_SET(state, "inactive", "failed");
}
int manager_job_is_active(Manager *manager, const char *path) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
int r;
assert(manager);
assert(path);
r = sd_bus_get_property(
manager->bus,
"org.freedesktop.systemd1",
path,
"org.freedesktop.systemd1.Job",
"State",
&error,
&reply,
"s");
if (r < 0) {
if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
return true;
if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
return false;
return r;
}
/* We don't actually care about the state really. The fact
* that we could read the job state is enough for us */
return true;
}
int manager_get_machine_by_pid(Manager *m, pid_t pid, Machine **machine) {
Machine *mm;
int r;
assert(m);
assert(pid >= 1);
assert(machine);
mm = hashmap_get(m->machine_leaders, PID_TO_PTR(pid));
if (!mm) {
_cleanup_free_ char *unit = NULL;
r = cg_pid_get_unit(pid, &unit);
if (r >= 0)
mm = hashmap_get(m->machine_units, unit);
}
if (!mm)
return 0;
*machine = mm;
return 1;
}
int manager_add_machine(Manager *m, const char *name, Machine **_machine) {
Machine *machine;
assert(m);
assert(name);
machine = hashmap_get(m->machines, name);
if (!machine) {
machine = machine_new(m, _MACHINE_CLASS_INVALID, name);
if (!machine)
return -ENOMEM;
}
if (_machine)
*_machine = machine;
return 0;
}
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