RTEMS | JFFS2 fails test about rename with long file name (#5073)

[Loris Nardo (@loris.nardo)]

Loris Nardo commented: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5073#note_110534


About this issue, there are a bunch of things that can be done:
- Explicitly forbid names longer than `JFFS2_MAX_NAME_LEN` or `NAME_MAX` (the first seems better)
- Update the fpathconf `PC_NAME_MAX` to yield back the same information of `statvfs.f_namemax`
- Update the testcase to use the information from `fstatvfs` or `fpathconf` for the maximum allowed name and not `NAME_MAX` (this change may impact other filesystem).

Digging a bit further in the code, while there is not apparent limit on the file name length when created, if it is greater than `JFFS2_MAX_NAME_LEN`, then the file cannot be removed or renamed (see the function `rtems_jffs2_cache_fd_name`).

What are your opinion on this?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5073#note_110534
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