diff options
Diffstat (limited to 'src/machine/machine-varlink.c')
| -rw-r--r-- | src/machine/machine-varlink.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/machine/machine-varlink.c b/src/machine/machine-varlink.c new file mode 100644 index 0000000..968da3c --- /dev/null +++ b/src/machine/machine-varlink.c @@ -0,0 +1,173 @@ +/* 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); +} |