Review and correct error handling in POSIX and XCache, implement XCache::Unlink() #997
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…he::Unlink().
* [XCache] Implement Cache::Unlink(); use it for handling of FSync errors, too.
- Unlink removes specified data file and corresponding cinfo file.
- If a file is currently open, it is put into shutdown mode.
All new Read requests on File fail immediately with ENOENT error code.
* [POSIX] Correct inconsitent errno handling.
* [XCache] Review error handling and bring error codes in sync with POSIX changes.
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[XCache] Implement Cache::Unlink(); use it for handling of FSync errors, too.
All new Read requests on File fail immediately with ENOENT error code.
[POSIX] Correct inconsitent errno handling.
[XCache] Review error handling and bring error codes in sync with POSIX changes.