Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 1 | // SPDX-License-Identifier: Apache-2.0 |
| 2 | // Copyright (C) 2018 IBM Corp. |
| 3 | #include "config.h" |
| 4 | |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 5 | #include <assert.h> |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 6 | #include <errno.h> |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 7 | #include <string.h> |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 8 | #include <systemd/sd-bus.h> |
| 9 | |
| 10 | #include "common.h" |
| 11 | #include "dbus.h" |
| 12 | #include "mboxd.h" |
| 13 | #include "protocol.h" |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 14 | #include "transport.h" |
| 15 | |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 16 | static int transport_dbus_flush_events(struct mbox_context *context, |
| 17 | uint8_t events) |
| 18 | { |
| 19 | char *props[3] = { 0 }; |
| 20 | int i = 0; |
| 21 | int rc; |
| 22 | |
| 23 | if (events & BMC_EVENT_FLASH_CTRL_LOST) { |
| 24 | props[i++] = "FlashControlLost"; |
| 25 | } |
| 26 | |
| 27 | if (events & BMC_EVENT_DAEMON_READY) { |
| 28 | props[i++] = "DaemonReady"; |
| 29 | } |
| 30 | |
| 31 | rc = sd_bus_emit_properties_changed_strv(context->bus, |
| 32 | MBOX_DBUS_OBJECT, |
| 33 | /* FIXME: Hard-coding v2 */ |
| 34 | MBOX_DBUS_PROTOCOL_IFACE_V2, |
| 35 | props); |
| 36 | if (rc < 0) { |
| 37 | return rc; |
| 38 | } |
| 39 | |
| 40 | if (events & BMC_EVENT_WINDOW_RESET) { |
| 41 | sd_bus_message *m = NULL; |
| 42 | |
| 43 | rc = sd_bus_message_new_signal(context->bus, &m, |
| 44 | MBOX_DBUS_OBJECT, |
| 45 | /* FIXME: Hard-coding v2 */ |
| 46 | MBOX_DBUS_PROTOCOL_IFACE_V2, |
| 47 | "WindowReset"); |
| 48 | if (rc < 0) { |
| 49 | return rc; |
| 50 | } |
| 51 | |
| 52 | rc = sd_bus_send(context->bus, m, NULL); |
| 53 | if (rc < 0) { |
| 54 | return rc; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | if (events & BMC_EVENT_REBOOT) { |
| 59 | sd_bus_message *m = NULL; |
| 60 | |
| 61 | rc = sd_bus_message_new_signal(context->bus, &m, |
| 62 | MBOX_DBUS_OBJECT, |
| 63 | /* FIXME: Hard-coding v2 */ |
| 64 | MBOX_DBUS_PROTOCOL_IFACE_V2, |
| 65 | "ProtocolReset"); |
| 66 | if (rc < 0) { |
| 67 | return rc; |
| 68 | } |
| 69 | |
| 70 | rc = sd_bus_send(context->bus, m, NULL); |
| 71 | if (rc < 0) { |
| 72 | return rc; |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
Andrew Jeffery | 4414fb8 | 2018-08-20 12:13:09 +0930 | [diff] [blame] | 79 | static int transport_dbus_set_events(struct mbox_context *context, |
| 80 | uint8_t events) |
| 81 | { |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 82 | context->bmc_events |= events; |
| 83 | |
| 84 | return transport_dbus_flush_events(context, events); |
Andrew Jeffery | 4414fb8 | 2018-08-20 12:13:09 +0930 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | static int transport_dbus_clear_events(struct mbox_context *context, |
| 88 | uint8_t events) |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 89 | { |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 90 | context->bmc_events &= ~events; |
| 91 | |
| 92 | return transport_dbus_flush_events(context, events); |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static const struct transport_ops transport_dbus_ops = { |
Andrew Jeffery | 4414fb8 | 2018-08-20 12:13:09 +0930 | [diff] [blame] | 96 | .set_events = transport_dbus_set_events, |
| 97 | .clear_events = transport_dbus_clear_events, |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 98 | }; |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 99 | |
| 100 | static int transport_dbus_get_info(sd_bus_message *m, void *userdata, |
| 101 | sd_bus_error *ret_error) |
| 102 | { |
| 103 | struct mbox_context *context = userdata; |
| 104 | struct protocol_get_info io; |
| 105 | sd_bus_message *n; |
| 106 | int rc; |
| 107 | |
| 108 | if (!context) { |
| 109 | MSG_ERR("DBUS Internal Error\n"); |
| 110 | return -EINVAL; |
| 111 | } |
| 112 | |
| 113 | rc = sd_bus_message_read_basic(m, 'y', &io.req.api_version); |
| 114 | if (rc < 0) { |
| 115 | MSG_ERR("DBUS error reading message: %s\n", strerror(-rc)); |
| 116 | return rc; |
| 117 | } |
| 118 | |
| 119 | rc = context->protocol->get_info(context, &io); |
| 120 | if (rc < 0) { |
| 121 | return rc; |
| 122 | } |
| 123 | |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 124 | /* Switch transport to DBus. This is fine as DBus signals are async */ |
| 125 | context->transport = &transport_dbus_ops; |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 126 | transport_dbus_flush_events(context, context->bmc_events); |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 127 | |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 128 | rc = sd_bus_message_new_method_return(m, &n); |
| 129 | if (rc < 0) { |
| 130 | MSG_ERR("sd_bus_message_new_method_return failed: %d\n", rc); |
| 131 | return rc; |
| 132 | } |
| 133 | |
| 134 | if (API_VERSION_2 != io.resp.api_version) { |
| 135 | MSG_ERR("Unsupported protocol version for DBus transport: %d\n", |
| 136 | io.resp.api_version); |
| 137 | return rc; |
| 138 | } |
| 139 | |
| 140 | rc = sd_bus_message_append(n, "yyq", |
| 141 | io.resp.api_version, |
| 142 | io.resp.v2.block_size_shift, |
| 143 | io.resp.v2.timeout); |
| 144 | if (rc < 0) { |
| 145 | MSG_ERR("sd_bus_message_append failed!\n"); |
| 146 | return rc; |
| 147 | } |
| 148 | |
| 149 | return sd_bus_send(NULL, n, NULL); |
| 150 | } |
| 151 | |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 152 | static int transport_dbus_get_property(sd_bus *bus, |
| 153 | const char *path, |
| 154 | const char *interface, |
| 155 | const char *property, |
| 156 | sd_bus_message *reply, |
| 157 | void *userdata, |
| 158 | sd_bus_error *ret_error) |
| 159 | { |
| 160 | struct mbox_context *context = userdata; |
| 161 | bool value; |
| 162 | |
| 163 | assert(!strcmp(MBOX_DBUS_OBJECT, path)); |
| 164 | assert(!strcmp(MBOX_DBUS_PROTOCOL_IFACE_V2, interface)); |
| 165 | |
| 166 | if (!strcmp("FlashControlLost", property)) { |
| 167 | value = context->bmc_events & BMC_EVENT_FLASH_CTRL_LOST; |
| 168 | } else if (!strcmp("DaemonReady", property)) { |
| 169 | value = context->bmc_events & BMC_EVENT_DAEMON_READY; |
| 170 | } else { |
| 171 | MSG_ERR("Unknown DBus property: %s\n", property); |
| 172 | return -EINVAL; |
| 173 | } |
| 174 | |
| 175 | return sd_bus_message_append(reply, "b", value); |
| 176 | } |
| 177 | |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 178 | static const sd_bus_vtable protocol_unversioned_vtable[] = { |
| 179 | SD_BUS_VTABLE_START(0), |
| 180 | SD_BUS_METHOD("GetInfo", "y", "yyq", &transport_dbus_get_info, |
| 181 | SD_BUS_VTABLE_UNPRIVILEGED), |
| 182 | SD_BUS_VTABLE_END |
| 183 | }; |
| 184 | |
| 185 | static const sd_bus_vtable protocol_v2_vtable[] = { |
| 186 | SD_BUS_VTABLE_START(0), |
| 187 | SD_BUS_METHOD("GetInfo", "y", "yyq", &transport_dbus_get_info, |
| 188 | SD_BUS_VTABLE_UNPRIVILEGED), |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 189 | SD_BUS_PROPERTY("FlashControlLost", "b", transport_dbus_get_property, |
| 190 | 0, /* Just a pointer to struct mbox_context */ |
| 191 | SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| 192 | SD_BUS_PROPERTY("DaemonReady", "b", transport_dbus_get_property, |
| 193 | 0, /* Just a pointer to struct mbox_context */ |
| 194 | SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| 195 | SD_BUS_SIGNAL("ProtocolReset", NULL, 0), |
| 196 | SD_BUS_SIGNAL("WindowReset", NULL, 0), |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 197 | SD_BUS_VTABLE_END |
| 198 | }; |
| 199 | |
| 200 | int transport_dbus_init(struct mbox_context *context) |
| 201 | { |
| 202 | int rc; |
| 203 | |
| 204 | rc = sd_bus_add_object_vtable(context->bus, NULL, |
| 205 | MBOX_DBUS_OBJECT, |
| 206 | MBOX_DBUS_PROTOCOL_IFACE, |
| 207 | protocol_unversioned_vtable, |
| 208 | context); |
| 209 | if (rc < 0) { |
| 210 | return rc; |
| 211 | } |
| 212 | |
| 213 | rc = sd_bus_add_object_vtable(context->bus, NULL, |
| 214 | MBOX_DBUS_OBJECT, |
Andrew Jeffery | a6ca7a9 | 2018-08-20 13:03:44 +0930 | [diff] [blame^] | 215 | MBOX_DBUS_PROTOCOL_IFACE_V2, |
Andrew Jeffery | 23140be | 2018-09-05 14:15:07 +0930 | [diff] [blame] | 216 | protocol_v2_vtable, context); |
| 217 | |
| 218 | return rc; |
| 219 | } |
| 220 | |
| 221 | #define __unused __attribute__((unused)) |
| 222 | void transport_dbus_free(struct mbox_context *context __unused) |
| 223 | { |
| 224 | return; |
| 225 | } |