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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <limits.h>
#include "sd-id128.h"
#include "hostname-util.h"
#include "json.h"
#include "machine-varlink.h"
#include "machine.h"
#include "path-util.h"
#include "pidref.h"
#include "process-util.h"
#include "socket-util.h"
#include "string-util.h"
#include "varlink.h"
static JSON_DISPATCH_ENUM_DEFINE(dispatch_machine_class, MachineClass, machine_class_from_string);
static int machine_name(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
char **m = ASSERT_PTR(userdata);
const char *hostname;
int r;
assert(variant);
if (!json_variant_is_string(variant))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name));
hostname = json_variant_string(variant);
if (!hostname_is_valid(hostname, /* flags= */ 0))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Invalid machine name");
r = free_and_strdup(m, hostname);
if (r < 0)
return json_log_oom(variant, flags);
return 0;
}
static int machine_leader(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
PidRef *leader = ASSERT_PTR(userdata);
_cleanup_(pidref_done) PidRef temp = PIDREF_NULL;
uint64_t k;
int r;
if (!json_variant_is_unsigned(variant))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name));
k = json_variant_unsigned(variant);
if (k > PID_T_MAX || !pid_is_valid(k))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid PID.", strna(name));
if (k == 1)
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid leader PID.", strna(name));
r = pidref_set_pid(&temp, k);
if (r < 0)
return json_log(variant, flags, r, "Failed to pin process " PID_FMT ": %m", leader->pid);
pidref_done(leader);
*leader = TAKE_PIDREF(temp);
return 0;
}
static int machine_ifindices(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
Machine *m = ASSERT_PTR(userdata);
_cleanup_free_ int *netif = NULL;
size_t n_netif, k = 0;
assert(variant);
if (!json_variant_is_array(variant))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an array.", strna(name));
n_netif = json_variant_elements(variant);
netif = new(int, n_netif);
if (!netif)
return json_log_oom(variant, flags);
JsonVariant *i;
JSON_VARIANT_ARRAY_FOREACH(i, variant) {
uint64_t b;
if (!json_variant_is_unsigned(i))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Element %zu of JSON field '%s' is not an unsigned integer.", k, strna(name));
b = json_variant_unsigned(i);
if (b > INT_MAX || b <= 0)
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "Invalid network interface index %"PRIu64, b);
netif[k++] = (int) b;
}
assert(k == n_netif);
free_and_replace(m->netif, netif);
m->n_netif = n_netif;
return 0;
}
static int machine_cid(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
unsigned cid, *c = ASSERT_PTR(userdata);
assert(variant);
if (!json_variant_is_unsigned(variant))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name));
cid = json_variant_unsigned(variant);
if (!VSOCK_CID_IS_REGULAR(cid))
return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a regular VSOCK CID.", strna(name));
*c = cid;
return 0;
}
int vl_method_register(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
Manager *manager = ASSERT_PTR(userdata);
_cleanup_(machine_freep) Machine *machine = NULL;
int r;
static const JsonDispatch dispatch_table[] = {
{ "name", JSON_VARIANT_STRING, machine_name, offsetof(Machine, name), JSON_MANDATORY },
{ "id", JSON_VARIANT_STRING, json_dispatch_id128, offsetof(Machine, id), 0 },
{ "service", JSON_VARIANT_STRING, json_dispatch_string, offsetof(Machine, service), 0 },
{ "class", JSON_VARIANT_STRING, dispatch_machine_class, offsetof(Machine, class), JSON_MANDATORY },
{ "leader", JSON_VARIANT_UNSIGNED, machine_leader, offsetof(Machine, leader), 0 },
{ "rootDirectory", JSON_VARIANT_STRING, json_dispatch_absolute_path, offsetof(Machine, root_directory), 0 },
{ "ifIndices", JSON_VARIANT_ARRAY, machine_ifindices, 0, 0 },
{ "vSockCid", JSON_VARIANT_UNSIGNED, machine_cid, offsetof(Machine, vsock_cid), 0 },
{ "sshAddress", JSON_VARIANT_STRING, json_dispatch_string, offsetof(Machine, ssh_address), JSON_SAFE },
{ "sshPrivateKeyPath", JSON_VARIANT_STRING, json_dispatch_absolute_path, offsetof(Machine, ssh_private_key_path), 0 },
{}
};
r = machine_new(_MACHINE_CLASS_INVALID, NULL, &machine);
if (r < 0)
return r;
r = varlink_dispatch(link, parameters, dispatch_table, machine);
if (r != 0)
return r;
if (!pidref_is_set(&machine->leader)) {
r = varlink_get_peer_pidref(link, &machine->leader);
if (r < 0)
return r;
}
r = machine_link(manager, machine);
if (r == -EEXIST)
return varlink_error(link, "io.systemd.Machine.MachineExists", NULL);
if (r < 0)
return r;
r = cg_pidref_get_unit(&machine->leader, &machine->unit);
if (r < 0)
return r;
r = machine_start(machine, NULL, NULL);
if (r < 0)
return r;
/* the manager will free this machine */
TAKE_PTR(machine);
return varlink_reply(link, NULL);
}
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