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kern/50423: kernel interface for reporting errors to file systems
>Synopsis: kernel interface for reporting errors to file systems
>Arrival-Date: Fri Nov 13 15:05:00 +0000 2015
>Originator: Thomas Klausner
>Release: NetBSD 7.99.21
Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only that the cat died nobly.
- Arnold Edinborough
While Greg Oster and I were discussing RAID features, we decided it'd be
neat to have a kernel interface that could report disk or raid errors to
a file system.
The file system could then use the information from below to translate
this to errors that are meaningful to the user.
Direct reports from the disk/RAID are not as useful, since you could
have e.g. ffs-on-cgd-on-RAID, and if RAID just reports a checksum problem
in block 5100194 then the user will have no useful information at all.
Design such a kernel interface, support it from sd/wd/raid/ccd/lvm/...
and the file systems.
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