tree 91599ec9b759f7e3c5defcb8dd361acd7288154c
parent 7723ec9777d9832849b76475b1a21a2872a40d20
author Marc Eshel <eshel@almaden.ibm.com> 1169154935 -0500
committer J. Bruce Fields <bfields@citi.umich.edu> 1178493804 -0400

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

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>