in_ebpf: add three missing config option descriptions. Fixes #11221.

[eschabell]

in_ebpf: add three missing config option descriptions for:

ringbuf_map_name - should describe the BPF ring buffer map name
poll_ms - should describe the polling interval in milliseconds
Trace - should describe the trace type to enable (for example, bind, malloc, signal)

Fixes #11221

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Testing
Before we can approve your change; please submit the following in a comment:

• [N/A ] Example configuration file for the change
• [N/A ] Debug log output from testing the change
• [N/A ] Attached Valgrind output that shows no leaks or memory corruption was found
• [N/A ] Run local packaging test showing all targets (including any new ones) build.
• [N/A ] Set ok-package-test label to test for all targets (requires maintainer to do).

Documentation

• Documentation required for this feature
  Issue: eBPF input plugin doc updates with config options. fluent-bit-docs#2239
  Doc PR: Updated ebpf input plugin doc with new config options and cleanup. Fixes #2239. fluent-bit-docs#2240

Backporting

• [N/A ] Backport to latest stable release.

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

Summary by CodeRabbit

• Documentation
  • Added user-facing descriptions for eBPF plugin configuration options:
    • ring buffer map name: clarifies which ring buffer to read events from.
    • polling interval: clarifies the interval (ms) used to collect events.
    • trace settings: explains how to specify eBPF traces and that the option can be provided multiple times.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

Added description strings to each config_map entry in the eBPF input plugin and updated the public config map structure to include a description member so the options ringbuf_map_name, poll_ms, and Trace now have help text.

Changes

Cohort / File(s)	Summary
eBPF plugin config plugins/in_ebpf/in_ebpf.c	Added description strings to three config_map entries: ringbuf_map_name ("Set the name of the eBPF ring buffer map to read events from"), poll_ms ("Set the polling interval in milliseconds for collecting events"), and Trace ("Set the eBPF trace to enable (for example, bind, malloc, signal). Can be set multiple times"). Added EOF marker comment in the array.
Public config map declaration include/...flb_config_map*	Public struct flb_config_map now includes a description (const char *) member so config entries can carry descriptive strings; initializers updated accordingly.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Focus review on ensuring all struct flb_config_map initializers across the codebase were updated to include the new description field.
• Verify build and help output for plugins that use config_map.

Possibly related PRs

• in_elasticsearch: fixing missing config parameter description for http2. Fixes #11221. #11226 — Adds missing description strings to plugin config_map entries (same change pattern).
• in_http: added missing config parameter descriptions. #11240 — Adds missing config parameter description strings to plugin config_map entries (related plugin changes).

Suggested reviewers

• edsiper
• cosmo0920

Poem

🐰 I hopped through code to leave a clue,
Ringbuf, poll, and Trace — now told true.
Tiny strings that softly gleam,
Guiding users like a dream. ✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The PR successfully implements all three required config option descriptions (ringbuf_map_name, poll_ms, Trace) as specified in issue #11221.
Out of Scope Changes check	✅ Passed	All changes are directly scoped to adding the three missing descriptions; no extraneous modifications were introduced.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: adding three missing config option descriptions to the in_ebpf plugin, and it references the fixed issue.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[eschabell]

@coderabbitai review

[coderabbitai]

✅ Actions performed

Review triggered.

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[DavidKorczynski]

The CIFuzz crashing here is not due to this PR, it is due to some infrastructure updates on OSS-Fuzz. Ref: #11227

[edsiper]

let's cleanup the history of this PR (commits)

[eschabell]

@edsiper fixed the commit messages.

[eschabell]

@edsiper squashed commits.