commit 6c0d8ce1309afb96a253deba5af6287ddba75dc4
author John Wedig <johnwedig@google.com> Fri Apr 22 14:00:43 2022 -0700
committer John Wedig <johnwedig@google.com> Wed Apr 27 14:08:10 2022 -0700
tree 71cdb1a97e0f7a0d092979f56013216d02deb3f6
parent 2f187348b4ebb8a3d1acdbbdfb86902c0b49cccc

Add association between chassis and drive

This commit adds an association between the storage device ("drive") and
the associated chassis. Specifically, the new association is the
following:
  ["chassis", "drive", <chassis_path>]

This association will be used in bmcweb to add Redfish links between
drive and chassis.

Tested:
$ busctl get-property xyz.openbmc_project.eStoraged \
  /xyz/openbmc_project/inventory/storage/mmcblk0 \
  xyz.openbmc_project.Association.Definitions Associations
$ busctl get-property xyz.openbmc_project.ObjectMapper \
  /xyz/openbmc_project/inventory/system/board/dcscm/drive \
  xyz.openbmc_project.Association endpoints
$ busctl get-property xyz.openbmc_project.ObjectMapper \
  /xyz/openbmc_project/inventory/storage/mmcblk0/chassis \
  xyz.openbmc_project.Association endpoints

Signed-off-by: John Wedig <johnwedig@google.com>
Change-Id: Ie21725e9ceb5134ac94854dcb06f3b86a48eeabd

src/estoraged.cpp

diff --git a/src/estoraged.cpp b/src/estoraged.cpp
index 6ea2cb2..af20d32 100644
--- a/src/estoraged.cpp
+++ b/src/estoraged.cpp
@@ -26,13 +26,15 @@
 namespace estoraged
 {
 
+using Association = std::tuple<std::string, std::string, std::string>;
 using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
 using sdbusplus::xyz::openbmc_project::Common::Error::UnsupportedRequest;
 using sdbusplus::xyz::openbmc_project::Inventory::Item::server::Volume;
 
 EStoraged::EStoraged(sdbusplus::asio::object_server& server,
-                     const std::string& devPath, const std::string& luksName,
-                     uint64_t size, uint8_t lifeTime,
+                     const std::string& configPath, const std::string& devPath,
+                     const std::string& luksName, uint64_t size,
+                     uint8_t lifeTime,
                      std::unique_ptr<CryptsetupInterface> cryptInterface,
                      std::unique_ptr<FilesystemInterface> fsInterface) :
     devPath(devPath),
@@ -43,11 +45,12 @@
     /* Get the filename of the device (without "/dev/"). */
     std::string deviceName = std::filesystem::path(devPath).filename().string();
     /* DBus object path */
-    std::string path = "/xyz/openbmc_project/inventory/storage/" + deviceName;
+    std::string objectPath =
+        "/xyz/openbmc_project/inventory/storage/" + deviceName;
 
     /* Add Volume interface. */
     volumeInterface = objectServer.add_interface(
-        path, "xyz.openbmc_project.Inventory.Item.Volume");
+        objectPath, "xyz.openbmc_project.Inventory.Item.Volume");
     volumeInterface->register_method(
         "FormatLuks", [this](const std::vector<uint8_t>& password,
                              Volume::FilesystemType type) {
@@ -74,19 +77,30 @@
 
     /* Add Drive interface. */
     driveInterface = objectServer.add_interface(
-        path, "xyz.openbmc_project.Inventory.Item.Drive");
+        objectPath, "xyz.openbmc_project.Inventory.Item.Drive");
     driveInterface->register_property("Capacity", size);
     driveInterface->register_property("PredictedMediaLifeLeftPercent",
                                       lifeTime);
 
     volumeInterface->initialize();
     driveInterface->initialize();
+
+    /* Set up the association between chassis and drive. */
+    association = objectServer.add_interface(
+        objectPath, "xyz.openbmc_project.Association.Definitions");
+
+    std::vector<Association> associations;
+    associations.emplace_back("chassis", "drive",
+                              std::filesystem::path(configPath).parent_path());
+    association->register_property("Associations", associations);
+    association->initialize();
 }
 
 EStoraged::~EStoraged()
 {
     objectServer.remove_interface(volumeInterface);
     objectServer.remove_interface(driveInterface);
+    objectServer.remove_interface(association);
 }
 
 void EStoraged::formatLuks(const std::vector<uint8_t>& password,