+static void set_exclusive_devtype(struct config *config,
+ enum device_type devtype)
+{
+ config->n_boot_priorities = 2;
+ config->boot_priorities = talloc_realloc(config,
+ config->boot_priorities, struct boot_priority,
+ config->n_boot_priorities);
+ config->boot_priorities[0].type = devtype;
+ config->boot_priorities[0].priority = 0;
+ config->boot_priorities[1].type = DEVICE_TYPE_ANY;
+ config->boot_priorities[1].priority = -1;
+}
+
+/* bootdev options that we recognise */
+enum ipmi_bootdev {
+ IPMI_BOOTDEV_NONE = 0x00,
+ IPMI_BOOTDEV_NETWORK = 0x01,
+ IPMI_BOOTDEV_DISK = 0x2,
+ IPMI_BOOTDEV_SAFE = 0x3,
+ IPMI_BOOTDEV_CDROM = 0x5,
+ IPMI_BOOTDEV_SETUP = 0x6,
+};
+
+static int read_bootdev_sysparam(const char *name, uint8_t *val)
+{
+ uint8_t buf[2];
+ char path[50];
+ int fd, rc;
+
+ strcpy(path, sysparams_dir);
+ assert(strlen(name) < sizeof(path) - strlen(path));
+ strcat(path, name);
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ pb_debug("powerpc: can't access sysparam %s\n",
+ name);
+ return -1;
+ }
+
+ rc = read(fd, buf, sizeof(buf));
+
+ close(fd);
+
+ /* bootdev definitions should only be one byte in size */
+ if (rc != 1) {
+ pb_debug("powerpc: sysparam %s read returned %d\n",
+ name, rc);
+ return -1;
+ }
+
+ pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
+
+ switch (buf[0]) {
+ default:
+ return -1;
+ case IPMI_BOOTDEV_NONE:
+ case IPMI_BOOTDEV_NETWORK:
+ case IPMI_BOOTDEV_DISK:
+ case IPMI_BOOTDEV_SAFE:
+ case IPMI_BOOTDEV_CDROM:
+ case IPMI_BOOTDEV_SETUP:
+ *val = buf[0];
+ }
+
+ return 0;
+}
+
+static int write_bootdev_sysparam(const char *name, uint8_t val)
+{
+ char path[50];
+ int fd, rc;
+
+ strcpy(path, sysparams_dir);
+ assert(strlen(name) < sizeof(path) - strlen(path));
+ strcat(path, name);
+
+ fd = open(path, O_WRONLY);
+ if (fd < 0) {
+ pb_debug("powerpc: can't access sysparam %s for writing\n",
+ name);
+ return -1;
+ }
+
+ for (;;) {
+ errno = 0;
+ rc = write(fd, &val, sizeof(val));
+ if (rc == sizeof(val)) {
+ rc = 0;
+ break;
+ }
+
+ if (rc <= 0 && errno != EINTR) {
+ pb_log("powerpc: error updating sysparam %s: %s",
+ name, strerror(errno));
+ rc = -1;
+ break;
+ }
+ }
+
+ close(fd);
+
+ if (!rc)
+ pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
+
+ return rc;
+}
+
+static void parse_opal_sysparams(struct config *config)
+{
+ uint8_t next_bootdev, default_bootdev;
+ bool next_valid, default_valid;
+ int rc;
+
+ rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
+ next_valid = rc == 0;
+
+ rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
+ default_valid = rc == 0;
+
+ /* nothing valid? no need to change the config */
+ if (!next_valid && !default_valid)
+ return;
+
+ if (next_valid) {
+ /* invalidate next-boot-device setting */
+ write_bootdev_sysparam("next-boot-device", 0xff);
+ } else {
+ next_bootdev = default_bootdev;
+ }
+
+ switch (next_bootdev) {
+ case IPMI_BOOTDEV_NONE:
+ return;
+ case IPMI_BOOTDEV_DISK:
+ set_exclusive_devtype(config, DEVICE_TYPE_DISK);
+ break;
+ case IPMI_BOOTDEV_NETWORK:
+ set_exclusive_devtype(config, DEVICE_TYPE_NETWORK);
+ break;
+ case IPMI_BOOTDEV_CDROM:
+ set_exclusive_devtype(config, DEVICE_TYPE_OPTICAL);
+ break;
+ case IPMI_BOOTDEV_SETUP:
+ config->autoboot_enabled = false;
+ break;
+ case IPMI_BOOTDEV_SAFE:
+ config->autoboot_enabled = false;
+ config->safe_mode = true;
+ break;
+ }
+}
+