diff options
Diffstat (limited to 'src/grp-machine/systemd-machined/machined-dbus.c')
| -rw-r--r-- | src/grp-machine/systemd-machined/machined-dbus.c | 1551 |
1 files changed, 1551 insertions, 0 deletions
diff --git a/src/grp-machine/systemd-machined/machined-dbus.c b/src/grp-machine/systemd-machined/machined-dbus.c new file mode 100644 index 0000000000..96f2c4769e --- /dev/null +++ b/src/grp-machine/systemd-machined/machined-dbus.c @@ -0,0 +1,1551 @@ +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <string.h> +#include <unistd.h> + +#include <systemd/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 "formats-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 int property_get_pool_path( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + assert(bus); + assert(reply); + + return sd_bus_message_append(reply, "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; + struct stat st; + + assert(bus); + assert(reply); + + /* We try to read the quota info from /var/lib/machines, as + * well as the usage of the loopback file + * /var/lib/machines.raw, and pick the larger value. */ + + 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; + } + + if (stat("/var/lib/machines.raw", &st) >= 0) { + if (usage == (uint64_t) -1 || st.st_blocks * 512ULL > usage) + usage = st.st_blocks * 512ULL; + } + + 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; + struct stat st; + + assert(bus); + assert(reply); + + /* We try to read the quota limit from /var/lib/machines, as + * well as the size of the loopback file + * /var/lib/machines.raw, and pick the smaller value. */ + + 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; + } + + if (stat("/var/lib/machines.raw", &st) >= 0) { + if (size == (uint64_t) -1 || (uint64_t) st.st_size < size) + size = st.st_size; + } + + 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(name, NULL); + if (r == 0) + 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" : %s", m->leader, strerror(-r)); + 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 method_terminate_machine(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 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 bus_machine_method_terminate(message, machine, error); +} + +static int method_kill_machine(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 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 bus_machine_method_kill(message, machine, error); +} + +static int method_get_machine_addresses(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 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 bus_machine_method_get_addresses(message, machine, error); +} + +static int method_get_machine_os_release(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 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 bus_machine_method_get_os_release(message, machine, error); +} + +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(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) { + 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 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 bus_machine_method_open_pty(message, machine, error); +} + +static int method_open_machine_login(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_login(message, machine, error); +} + +static int method_open_machine_shell(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_shell(message, machine, error); +} + +static int method_bind_mount_machine(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_bind_mount(message, machine, error); +} + +static int method_copy_machine(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_copy(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; + int r; + + assert(message); + + 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(name, &i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name); + + i->userdata = userdata; + return bus_image_method_remove(message, i, error); +} + +static int method_rename_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(image_unrefp) Image* i = NULL; + const char *old_name; + int r; + + assert(message); + + r = sd_bus_message_read(message, "s", &old_name); + if (r < 0) + return r; + + if (!image_name_is_valid(old_name)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", old_name); + + r = image_find(old_name, &i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", old_name); + + i->userdata = userdata; + return bus_image_method_rename(message, i, error); +} + +static int method_clone_image(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(image_unrefp) Image *i = NULL; + const char *old_name; + int r; + + assert(message); + + r = sd_bus_message_read(message, "s", &old_name); + if (r < 0) + return r; + + if (!image_name_is_valid(old_name)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", old_name); + + r = image_find(old_name, &i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", old_name); + + i->userdata = userdata; + return bus_image_method_clone(message, i, error); +} + +static int method_mark_image_read_only(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(image_unrefp) Image *i = NULL; + const char *name; + int r; + + assert(message); + + 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(name, &i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name); + + i->userdata = userdata; + return bus_image_method_mark_read_only(message, i, error); +} + +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(limit, error); + if (r < 0) + return r; + + /* Resize the backing loopback device, if there is one, except if we asked to drop any limit */ + if (limit != (uint64_t) -1) { + r = btrfs_resize_loopback("/var/lib/machines", limit, false); + if (r == -ENOTTY) + return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Quota is only supported on btrfs."); + if (r < 0 && r != -ENODEV) /* ignore ENODEV, as that's what is returned if the file system is not on loopback */ + return sd_bus_error_set_errnof(error, r, "Failed to adjust loopback limit: %m"); + } + + (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) { + _cleanup_(image_unrefp) Image *i = NULL; + const char *name; + int r; + + assert(message); + + 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(name, &i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_IMAGE, "No image '%s' known", name); + + i->userdata = userdata; + return bus_image_method_set_limit(message, i, error); +} + +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 top 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; + } + + 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 top 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; + } + + 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("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("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("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)", "PIDs", "au", 1, pid); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "(sv)", "Delegate", "b", 1); + if (r < 0) + return r; + + r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", UINT64_C(16384)); + if (r < 0) + return bus_log_create_error(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_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; +} |