~/talk

Clean-up on Aisle "fsconfig(2)"

Talkat Linux Plumbers Conference 2025 · 2025-12-11..12-13· [security]
slides:none on file

Man pages for the “new” mount API finally land, and the talk calls out concrete gaps: FSCONFIG_SET_PATH and FSCONFIG_SET_PATH_EMPTY are effectively unused but needed to avoid race attacks; FSCONFIG_CMD_CREATE_EXCL returns an error without actionable info for singleton superblocks; FC log uses an eight-entry ring buffer with no drop notification; FS context enters an unrecoverable fail state so runtimes must rebuild contexts. Proposes unified helpers for path/FD, per-filesystem callbacks to report ignored options, and structured/pollable log output or bigger buffers.

AI-written summary · about

  1. 0:00Introduction and motivation
  2. 6:34FS config parameter limitations
  3. 15:42Singleton mount issues
  4. 20:19FS context log limitations
  5. 27:02FS context failure state problems
  6. 34:25Q&A and wrap-up
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