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* feat(filer): add atime field and TouchAccessTime RPC to filer proto
Introduce POSIX-style access-time tracking on the filer:
- FuseAttributes gains atime (field 22) and atime_ns (field 23).
- New TouchAccessTime RPC (and Touch{Access,Time}{Request,Response})
lets read paths bump atime without going through UpdateEntry's
chunk-rewrite/EqualEntry short-circuit.
Additive proto changes only; zero atime is treated as unset and
existing clients are unaffected. Java client proto is kept in lock
step.
Co-authored-by: Cursor <cursoragent@cursor.com>
* feat(filer): wire Atime through Attr codec with mtime fallback
Add Attr.Atime and round-trip it through EntryAttributeToPb /
EntryAttributeToExistingPb / PbToEntryAttribute. A zero proto atime
decodes as Mtime, so legacy entries report a sensible value and
freshly-created/updated entries default Atime to Mtime when callers
do not set it explicitly.
CreateEntry and UpdateEntry stamp Atime = Mtime (or Crtime) when it
is zero. TouchAccessTime later bypasses this path to write atime
alone via Store.UpdateEntry.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(filer): preserve atime in first epoch second on decode
The Atime decode branch previously treated any attr.Atime == 0 as
unset and overwrote it with Mtime, which drops valid timestamps in
the first second of the unix epoch where attr.Atime is 0 but
attr.AtimeNs > 0. Check both fields so we only fall back to Mtime
when both are zero.
Co-authored-by: Cursor <cursoragent@cursor.com>
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Co-authored-by: Cursor <cursoragent@cursor.com>