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gbmc/gbmcweb/edb21a35ef58866d9035ec6446958393f627dbac
commit
edb21a35ef58866d9035ec6446958393f627dbac
[log]
author
gBMC Team <gbmc-core@google.com>
Fri Aug 21 20:31:48 2026 -0700
committer
Sandesh Haridas Bhat <sandeshharidas@google.com>
Thu Sep 03 11:14:54 2026 -0700
tree
a5ea20c700780117881dc59a0aa44595a3250e72
parent
754b83e9a3c78acd9820b5b657d2e8fa0a43386f [diff]
Improve hardware telemetry error reporting by preserving canonical error codes.

Previously, low-level telemetry errors were collapsed into generic unavailable states in the middleware cache, swallowing precise diagnostic details.

This change:
- Updates the telemetry accessor base to cache and expose the precise canonical status returned by hardware read operations.
- Updates the polling sensor interface to map and propagate these granular status codes (such as driver read errors or data corruption) directly to the BMC state tables.
- Ensures downstream interfaces (like Redfish) receive specific, machine-readable symptoms instead of generic failure flags.

Testing:
- Added unit tests verifying telemetry state transitions for valid data, driver read issues, and data integrity failures.
Google-Bug-Id:511201651
PiperOrigin-RevId: 968842688

(cherry picked from commit 69630563cc324a007b4f3cf1c0af3201fe2079ea)
Change-Id: Ie38f1a4ca6431e436eae5bdb009fdd62b4eb99ba
5 files changed
tree: a5ea20c700780117881dc59a0aa44595a3250e72
  1. .github/
  2. config/
  3. g3/
  4. http/
  5. include/
  6. install/
  7. plugins/
  8. redfish-core/
  9. redfish_authorization/
  10. scripts/
  11. src/
  12. static/
  13. subprojects/
  14. test/
  15. tlbmc/
  16. .clang-format
  17. .clang-tidy
  18. .clang-tidy-ignore
  19. .dockerignore
  20. .gitignore
  21. .markdownlint.yaml
  22. .openbmc-enforce-gitlint
  23. .openbmc-no-clang
  24. .openbmc-no-sanitize
  25. .prettierignore
  26. .shellcheck
  27. AGGREGATION.md
  28. CLIENTS.md
  29. COMMON_ERRORS.md
  30. copy.bara.sky
  31. DBUS_USAGE.md
  32. DEVELOPING.md
  33. gcovr.cfg
  34. HEADERS.md
  35. LICENSE
  36. meson.build
  37. meson_options.txt
  38. OEM_SCHEMAS.md
  39. OWNERS
  40. PLUGINS.md
  41. README.md
  42. README_GOOGLE.md
  43. Redfish.md
  44. run-ci
  45. setup.cfg
  46. TESTING.md
  47. UNIT_TESTING.md
README.md

OpenBMC webserver

This project is Google's version of BMCWeb.

See Readme Google for Google added features. The following is the original README of OpenBMC/BMCWeb.

==============================================================================

This component attempts to be a “do everything” embedded webserver for OpenBMC.

Features

The webserver implements a few distinct interfaces:

  • DBus event websocket. Allows registering on changes to specific dbus paths, properties, and will send an event from the websocket if those filters match.
  • OpenBMC DBus REST api. Allows direct, low interference, high fidelity access to dbus and the objects it represents.
  • Serial: A serial websocket for interacting with the host serial console through websockets.
  • Redfish: A protocol compliant, DBus to Redfish translator.
  • KVM: A websocket based implementation of the RFB (VNC) frame buffer protocol intended to mate to webui-vue to provide a complete KVM implementation.

Protocols

bmcweb at a protocol level supports http and https. TLS is supported through OpenSSL.

AuthX

Authentication

Bmcweb supports multiple authentication protocols:

  • Basic authentication per RFC7617
  • Cookie based authentication for authenticating against webui-vue
  • Mutual TLS authentication based on OpenSSL
  • Session authentication through webui-vue
  • XToken based authentication conformant to Redfish DSP0266

Each of these types of authentication is able to be enabled or disabled both via runtime policy changes (through the relevant Redfish APIs) or via configure time options. All authentication mechanisms supporting username/password are routed to libpam, to allow for customization in authentication implementations.

Authorization

All authorization in bmcweb is determined at routing time, and per route, and conform to the Redfish PrivilegeRegistry.

*Note: Non-Redfish functions are mapped to the closest equivalent Redfish privilege level.

Configuration

bmcweb is configured per the meson build files. Available options are documented in meson_options.txt

Compile bmcweb with default options

meson builddir
ninja -C builddir

If any of the dependencies are not found on the host system during configuration, meson will automatically download them via its wrap dependencies mentioned in bmcweb/subprojects.

Use of persistent data

bmcweb relies on some on-system data for storage of persistent data that is internal to the process. Details on the exact data stored and when it is read/written can seen from the persistent_data namespace.

TLS certificate generation

When SSL support is enabled and a usable certificate is not found, bmcweb will generate a self-signed a certificate before launching the server. Please see the bmcweb source code for details on the parameters this certificate is built with.

Redfish Aggregation

bmcweb is capable of aggregating resources from satellite BMCs. Refer to AGGREGATION.md for more information on how to enable and use this feature.