gfapi: 'glfs_h_creat_open' - new API to create handle and open fd

2019-09-26T14:51:19+00:00

Right now we have two separate APIs, one
- 'glfs_h_creat_handle' to create handle & another
- 'glfs_h_open' to create a glfd to return to application

Having two separate routines can result in access errors
while trying to create and write into a read-only file.

Since a fd is opened even during file/directory creation,
introducing a new API to make these two operations atomic i.e,
which can create both handle & fd and pass them to application

This is backport of below mainline patch -
- https://review.gluster.org/#/c/glusterfs/+/23448/
- bz#1753569

release-6:
- https://review.gluster.org/#/c/glusterfs/+/23491/

Change-Id: Ibf513fcfcdad175f4d7eb6fa7a61b8feec6d33b5
fixes: bz#1756002
Signed-off-by: Soumya Koduri

glusterfs.git/tests/basic/gfapi/glfs_h_creat_open.t, branch v7.1

gfapi: 'glfs_h_creat_open' - new API to create handle and open fd