Andrew Jeffery | 55f4d6f | 2018-08-06 12:26:44 +0930 | [diff] [blame] | 1 | // SPDX-License-Identifier: Apache-2.0 |
| 2 | // Copyright (C) 2018 IBM Corp. |
| 3 | #include <assert.h> |
| 4 | #include <errno.h> |
Andrew Jeffery | 5320f6e | 2019-03-15 12:40:41 +1030 | [diff] [blame] | 5 | #include <stdlib.h> |
Andrew Jeffery | 55f4d6f | 2018-08-06 12:26:44 +0930 | [diff] [blame] | 6 | #include <systemd/sd-bus.h> |
| 7 | |
| 8 | #include "common.h" |
| 9 | #include "dbus.h" |
| 10 | #include "control_dbus.h" |
Andrew Jeffery | 26558db | 2018-08-10 00:22:38 +0930 | [diff] [blame] | 11 | #include "mboxd.h" |
Andrew Jeffery | 55f4d6f | 2018-08-06 12:26:44 +0930 | [diff] [blame] | 12 | |
| 13 | typedef int (*control_action)(struct mbox_context *context); |
| 14 | |
| 15 | static int control_dbus_directive(sd_bus_message *m, void *userdata, |
| 16 | sd_bus_error *ret_error, |
| 17 | control_action action) |
| 18 | { |
| 19 | struct mbox_context *context; |
| 20 | sd_bus_message *n; |
| 21 | int rc; |
| 22 | |
| 23 | if (!action) { |
| 24 | MSG_ERR("No action provided\n"); |
| 25 | return -EINVAL; |
| 26 | } |
| 27 | |
| 28 | context = (struct mbox_context *) userdata; |
| 29 | if (!context) { |
| 30 | MSG_ERR("DBUS Internal Error\n"); |
| 31 | return -EINVAL; |
| 32 | } |
| 33 | |
| 34 | rc = action(context); |
| 35 | if (rc < 0) { |
| 36 | MSG_ERR("Action failed: %d\n", rc); |
| 37 | return rc; |
| 38 | } |
| 39 | |
| 40 | rc = sd_bus_message_new_method_return(m, &n); |
| 41 | if (rc < 0) { |
| 42 | MSG_ERR("sd_bus_message_new_method_return failed: %d\n", rc); |
| 43 | return rc; |
| 44 | } |
| 45 | |
| 46 | return sd_bus_send(NULL, n, NULL); |
| 47 | } |
| 48 | |
| 49 | static int control_dbus_ping(sd_bus_message *m, void *userdata, |
| 50 | sd_bus_error *ret_error) |
| 51 | { |
| 52 | return control_dbus_directive(m, userdata, ret_error, control_ping); |
| 53 | } |
| 54 | |
| 55 | static int control_dbus_reset(sd_bus_message *m, void *userdata, |
| 56 | sd_bus_error *ret_error) |
| 57 | { |
| 58 | return control_dbus_directive(m, userdata, ret_error, control_reset); |
| 59 | } |
| 60 | |
| 61 | static int control_dbus_kill(sd_bus_message *m, void *userdata, |
| 62 | sd_bus_error *ret_error) |
| 63 | { |
| 64 | return control_dbus_directive(m, userdata, ret_error, control_kill); |
| 65 | } |
| 66 | |
| 67 | static int control_dbus_modified(sd_bus_message *m, void *userdata, |
| 68 | sd_bus_error *ret_error) |
| 69 | { |
| 70 | return control_dbus_directive(m, userdata, ret_error, control_modified); |
| 71 | } |
| 72 | |
| 73 | static int control_dbus_suspend(sd_bus_message *m, void *userdata, |
| 74 | sd_bus_error *ret_error) |
| 75 | { |
| 76 | return control_dbus_directive(m, userdata, ret_error, control_suspend); |
| 77 | } |
| 78 | |
| 79 | static int control_dbus_resume(sd_bus_message *m, void *userdata, |
| 80 | sd_bus_error *ret_error) |
| 81 | { |
| 82 | struct mbox_context *context; |
| 83 | sd_bus_message *n; |
| 84 | bool modified; |
| 85 | int rc; |
| 86 | |
| 87 | context = (struct mbox_context *) userdata; |
| 88 | if (!context) { |
| 89 | MSG_ERR("DBUS Internal Error\n"); |
| 90 | return -EINVAL; |
| 91 | } |
| 92 | |
| 93 | rc = sd_bus_message_read_basic(m, 'b', &modified); |
| 94 | if (rc < 0) { |
| 95 | MSG_ERR("DBUS error reading message: %s\n", strerror(-rc)); |
| 96 | return rc; |
| 97 | } |
| 98 | |
| 99 | rc = control_resume(context, modified); |
| 100 | if (rc < 0) |
| 101 | return rc; |
| 102 | |
| 103 | rc = sd_bus_message_new_method_return(m, &n); |
| 104 | if (rc < 0) { |
| 105 | MSG_ERR("sd_bus_message_new_method_return failed: %d\n", rc); |
| 106 | return rc; |
| 107 | } |
| 108 | |
| 109 | return sd_bus_send(NULL, n, NULL); |
| 110 | } |
| 111 | |
Andrew Jeffery | 5320f6e | 2019-03-15 12:40:41 +1030 | [diff] [blame] | 112 | static int control_dbus_set_backend(sd_bus_message *m, void *userdata, |
| 113 | sd_bus_error *ret_error) |
| 114 | { |
| 115 | struct mbox_context *context; |
| 116 | struct backend backend; |
| 117 | sd_bus_message *n; |
| 118 | const char *name; |
| 119 | int rc; |
| 120 | |
| 121 | context = (struct mbox_context *) userdata; |
| 122 | if (!context) { |
| 123 | MSG_ERR("DBUS Internal Error\n"); |
| 124 | return -EINVAL; |
| 125 | } |
| 126 | |
| 127 | rc = sd_bus_message_read_basic(m, 's', &name); |
| 128 | if (rc < 0) { |
| 129 | MSG_ERR("DBUS error reading message: %s\n", strerror(-rc)); |
| 130 | return rc; |
| 131 | } |
| 132 | |
| 133 | if (!strcmp(name, "vpnor")) { |
| 134 | struct vpnor_partition_paths paths; |
| 135 | |
| 136 | vpnor_default_paths(&paths); |
| 137 | backend = backend_get_vpnor(); |
| 138 | rc = control_set_backend(context, &backend, &paths); |
| 139 | if (rc < 0) |
| 140 | return rc; |
| 141 | } else if (!strcmp(name, "mtd")) { |
| 142 | char **paths = NULL; |
| 143 | char *path = NULL; |
| 144 | |
| 145 | rc = sd_bus_message_read_strv(m, &paths); |
| 146 | if (rc < 0) |
| 147 | return rc; |
| 148 | |
| 149 | if (paths && *paths) |
| 150 | path = *paths; |
| 151 | else |
| 152 | path = get_dev_mtd(); |
| 153 | |
| 154 | backend = backend_get_mtd(); |
| 155 | |
| 156 | rc = control_set_backend(context, &backend, path); |
| 157 | if (rc < 0) |
| 158 | return rc; |
| 159 | |
| 160 | free(path); |
| 161 | free(paths); |
| 162 | } else if (!strcmp(name, "file")) { |
| 163 | char **paths = NULL; |
| 164 | char *path = NULL; |
| 165 | |
| 166 | rc = sd_bus_message_read_strv(m, &paths); |
| 167 | if (rc < 0) |
| 168 | return rc; |
| 169 | |
| 170 | if (!(paths && *paths)) |
| 171 | return -EINVAL; |
| 172 | |
| 173 | path = *paths; |
| 174 | |
| 175 | backend = backend_get_file(); |
| 176 | |
| 177 | rc = control_set_backend(context, &backend, path); |
| 178 | if (rc < 0) |
| 179 | return rc; |
| 180 | |
| 181 | free(path); |
| 182 | free(paths); |
| 183 | } else { |
| 184 | return -EINVAL; |
| 185 | } |
| 186 | |
| 187 | rc = sd_bus_message_new_method_return(m, &n); |
| 188 | if (rc < 0) { |
| 189 | MSG_ERR("sd_bus_message_new_method_return failed: %d\n", rc); |
| 190 | return rc; |
| 191 | } |
| 192 | |
| 193 | return sd_bus_send(NULL, n, NULL); |
| 194 | } |
| 195 | |
Andrew Jeffery | 55f4d6f | 2018-08-06 12:26:44 +0930 | [diff] [blame] | 196 | static int control_dbus_get_u8(sd_bus *bus, const char *path, |
| 197 | const char *interface, const char *property, |
| 198 | sd_bus_message *reply, void *userdata, |
| 199 | sd_bus_error *ret_error) |
| 200 | { |
| 201 | struct mbox_context *context = userdata; |
| 202 | uint8_t value; |
| 203 | |
| 204 | assert(!strcmp(MBOX_DBUS_OBJECT, path)); |
| 205 | |
| 206 | if (!strcmp("DaemonState", property)) { |
| 207 | value = control_daemon_state(context); |
| 208 | } else if (!strcmp("LpcState", property)) { |
| 209 | value = control_lpc_state(context); |
| 210 | } else { |
| 211 | MSG_ERR("Unknown DBus property: %s\n", property); |
| 212 | return -EINVAL; |
| 213 | } |
| 214 | |
| 215 | return sd_bus_message_append(reply, "y", value); |
| 216 | } |
| 217 | |
| 218 | static const sd_bus_vtable mboxd_vtable[] = { |
| 219 | SD_BUS_VTABLE_START(0), |
| 220 | SD_BUS_METHOD("Ping", NULL, NULL, &control_dbus_ping, |
| 221 | SD_BUS_VTABLE_UNPRIVILEGED), |
| 222 | SD_BUS_METHOD("Reset", NULL, NULL, &control_dbus_reset, |
| 223 | SD_BUS_VTABLE_UNPRIVILEGED), |
| 224 | SD_BUS_METHOD("Kill", NULL, NULL, &control_dbus_kill, |
| 225 | SD_BUS_VTABLE_UNPRIVILEGED), |
| 226 | SD_BUS_METHOD("MarkFlashModified", NULL, NULL, &control_dbus_modified, |
| 227 | SD_BUS_VTABLE_UNPRIVILEGED), |
| 228 | SD_BUS_METHOD("Suspend", NULL, NULL, &control_dbus_suspend, |
| 229 | SD_BUS_VTABLE_UNPRIVILEGED), |
| 230 | SD_BUS_METHOD("Resume", "b", NULL, &control_dbus_resume, |
| 231 | SD_BUS_VTABLE_UNPRIVILEGED), |
Andrew Jeffery | 5320f6e | 2019-03-15 12:40:41 +1030 | [diff] [blame] | 232 | SD_BUS_METHOD("SetBackend", "sas", NULL, &control_dbus_set_backend, |
| 233 | SD_BUS_VTABLE_UNPRIVILEGED), |
Andrew Jeffery | 55f4d6f | 2018-08-06 12:26:44 +0930 | [diff] [blame] | 234 | SD_BUS_PROPERTY("DaemonState", "y", &control_dbus_get_u8, 0, |
| 235 | SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| 236 | SD_BUS_PROPERTY("LpcState", "y", &control_dbus_get_u8, 0, |
| 237 | SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| 238 | SD_BUS_VTABLE_END |
| 239 | }; |
| 240 | |
| 241 | int control_dbus_init(struct mbox_context *context) |
| 242 | { |
| 243 | return sd_bus_add_object_vtable(context->bus, NULL, |
| 244 | MBOX_DBUS_OBJECT, |
| 245 | MBOX_DBUS_CONTROL_IFACE, |
| 246 | mboxd_vtable, context); |
| 247 | } |
| 248 | |
| 249 | #define __unused __attribute__((unused)) |
| 250 | void control_dbus_free(struct mbox_context *context __unused) |
| 251 | { |
| 252 | return; |
| 253 | } |