struct udev_device *targetdev;
struct udev_device *fcdev = NULL;
const char *port;
- char *lun = NULL;;
+ char *lun = NULL;
targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
if (targetdev == NULL)
return hostdev;
}
+static struct udev_device *handle_scsi_hyperv(struct udev_device *parent, char **path) {
+ struct udev_device *hostdev;
+ struct udev_device *vmbusdev;
+ const char *guid_str;
+ char *lun = NULL;
+ char guid[38];
+ size_t i, k;
+
+ hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
+ if (!hostdev)
+ return NULL;
+
+ vmbusdev = udev_device_get_parent(hostdev);
+ if (!vmbusdev)
+ return NULL;
+
+ guid_str = udev_device_get_sysattr_value(vmbusdev, "device_id");
+ if (!guid_str)
+ return NULL;
+
+ if (strlen(guid_str) < 37 || guid_str[0] != '{' || guid_str[36] != '}')
+ return NULL;
+
+ for (i = 1, k = 0; i < 36; i++) {
+ if (guid_str[i] == '-')
+ continue;
+ guid[k++] = guid_str[i];
+ }
+ guid[k] = '\0';
+
+ format_lun_number(parent, &lun);
+ path_prepend(path, "vmbus-%s-%s", guid, lun);
+ free(lun);
+ return parent;
+}
+
static struct udev_device *handle_scsi(struct udev_device *parent, char **path)
{
const char *devtype;
goto out;
}
- /* lousy scsi sysfs does not have a "subsystem" for the transport */
+ /* scsi sysfs does not have a "subsystem" for the transport */
name = udev_device_get_syspath(parent);
if (strstr(name, "/rport-") != NULL) {
}
/*
- * We do not support the ATA transport class, it creates duplicated link
- * names as the fake SCSI host adapters are all separated, they are all
- * re-based as host == 0. ATA should just stop faking two duplicated
- * hierarchies for a single topology and leave the SCSI stuff alone;
- * until that happens, there are no by-path/ links for ATA devices behind
- * an ATA transport class.
+ * We do not support the ATA transport class, it uses global counters
+ * to name the ata devices which numbers spread across multiple
+ * controllers.
+ *
+ * The real link numbers are not exported. Also, possible chains of ports
+ * behind port multipliers cannot be composed that way.
+ *
+ * Until all that is solved at the kernel level, there are no by-path/
+ * links for ATA devices.
*/
if (strstr(name, "/ata") != NULL) {
parent = NULL;
goto out;
}
+ if (strstr(name, "/vmbus_") != NULL) {
+ parent = handle_scsi_hyperv(parent, path);
+ goto out;
+ }
+
parent = handle_scsi_default(parent, path);
out:
return parent;