locks: allow {vfs,posix}_lock_file to return conflicting lock

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The nfsv4 protocol's lock operation, in the case of a conflict, returns
information about the conflicting lock.

It's unclear how clients can use this, so for now we're not going so far as to
add a filesystem method that can return a conflicting lock, but we may as well
return something in the local case when it's easy to.

Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>

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Marc Eshel 2007-01-18 16:15:35 -05:00 • committed by J. Bruce Fields

parent 7723ec9777

commit 150b393456

5 changed files with 32 additions and 36 deletions

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include/linux/fs.h

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