tree 77c2daf3008dd03a3b0f8af179119cb26dc1f5ec
parent be1bf978e5d7cf26a78091ce1dd7c77ac64a658f
author Steve French <stfrench@microsoft.com> 1563321338 -0500
committer Steve French <stfrench@microsoft.com> 1574666054 -0600

cifs: add support for flock

The flock system call locks the whole file rather than a byte
range and so is currently emulated by various other file systems
by simply sending a byte range lock for the whole file.
Add flock handling for cifs.ko in similar way.

xfstest generic/504 passes with this as well

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>