CIFS: Rename bug on servers not supporting inode numbers

Jeff Layton jlayton at
Thu Nov 3 11:40:56 MDT 2011

On Thu, 3 Nov 2011 15:42:13 +0000
Anton Altaparmakov <aia21 at> wrote:

> Hi,
> I should add that we are using iocharset=utf8 mount option which means that the dcache hash/compare functions done in the cifs module do not work because it uses nls_tolower() and nls_strnicmp() both of which for utf8 NLS in the kernel do not do anything at all and effectively behave case sensitively!
> Thus this bug/problem in all likelyhood only affects utf8 iocharset users on a case-insensitive but case-preserving CIFS server that does not support server inode numbers.
> That probably explains why it has not been noticed before!
> We need utf8 thus we still need to fix this issue.
> Best regards,
> 	Anton

I'm confused...

If the filesystem being served out by the server is using utf8, then
how is it handling the case-insensitivity?

Jeff Layton <jlayton at>

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