gluster: the glfs_io_cbk callback function pointer adds pre/post stat args
The glfs_*_async() functions do a callback once finished. This callback has changed its arguments, pre- and post-stat structures have been added. This makes it possible to improve caching, which is useful for Samba and NFS-Ganesha, but not so much for QEMU. Gluster 6 is the first release that includes these new arguments. With an additional detection in ./configure, the new arguments can conditionally get included in the glfs_io_cbk handler. Signed-off-by: NNiels de Vos <ndevos@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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