cvs commit: src/sys/fs/msdosfs msdosfs_lookup.c

[Poul-Henning Kamp]

In message <200504162347.j3GNlJUA010418 at repoman.freebsd.org>, David Schultz wri
tes:

>  Log:
>  Disable negative name caching for msdosfs to work around a bug.
>  Since the name cache is case-sensitive and msdosfs isn't,
>  creating a file 'foo' won't invalidate a negative entry for 'FOO'.
>  There are similar problems related to 8.3 filenames.
>  
>  A better solution is to override VOP_LOOKUP with a method that
>  canonicalizes the name, then calls vfs_cache_lookup().  Unfortunately,
>  it's not quite that simple because vfs_cache_lookup() will call
>  msdosfs_lookup() on a cache miss, and msdosfs_lookup() needs a way to
>  get at the original component name.

I thought about something like that many years ago when I had
copied a file called read:me to a msdosfs floppy and handed it to
a NT using coworker who spent most of the day figuring out why
he couldn't get the damn file off the floppy.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.