tree ae7b21abc66cad23f0d88ef539a4a63b5770764e
parent 1d7c0f08e5c3f61f2b32b99f5c9579661d757194
author Jie Yang <jjy@google.com> 1624996754 -0700
committer Ed Tanous <ed@tanous.net> 1688159170 +0000

Add topology links for Chassis

Implement the physical topology design[0] for Chassis resources to
report which Chassis contain or are contained by other Chassis.

Query this information from the object mapper using associations
defined in phosphor-dbus-interfaces[1] and make it available in the
Links section of the Redfish result.

[0] https://gerrit.openbmc.org/c/openbmc/docs/+/54205
[1] https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/58441

Tested:
Built for evb-ast2600 with example JSON configs and ran in QEMU

Ran Redfish Service Validator with no new warnings

Sample output:
'''
curl -k -u root:0penBmc -X GET https://127.0.0.1:60443/redfish/v1/Chassis/Subchassis
{
  "@odata.id": "/redfish/v1/Chassis/Subchassis",
  "@odata.type": "#Chassis.v1_16_0.Chassis",
...
  "Id": "Subchassis",
  "Links": {
    "ComputerSystems": [
      {
        "@odata.id": "/redfish/v1/Systems/system"
      }
    ],
    "ContainedBy": {
      "@odata.id": "/redfish/v1/Chassis/Superchassis"
    },
    "ManagedBy": [
      {
        "@odata.id": "/redfish/v1/Managers/bmc"
      }
    ]
  },
...
}

curl -k -u root:0penBmc -X GET https://127.0.0.1:60443/redfish/v1/Chassis/Superchassis
{
  "@odata.id": "/redfish/v1/Chassis/Superchassis",
  "@odata.type": "#Chassis.v1_16_0.Chassis",
...
  "Id": "Superchassis",
  "Links": {
    "ComputerSystems": [
      {
        "@odata.id": "/redfish/v1/Systems/system"
      }
    ],
    "Contains": [
      {
        "@odata.id": "/redfish/v1/Chassis/Subchassis"
      }
    ],
    "Contains@odata.count": 1,
    "ManagedBy": [
      {
        "@odata.id": "/redfish/v1/Managers/bmc"
      }
    ]
  },
...
}
'''

Signed-off-by: Jie Yang <jjy@google.com>
Signed-off-by: Zhenwei Chen <zhenweichen0207@gmail.com>
Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Change-Id: Idc4c3e99b8269bcc5f94112e977a89970abd0bf3