Commit d03d9fe4 authored Jul 21, 2016 by J. Bruce Fields

nfsd: remove unnecessary positive-dentry check



vfs_{create,mkdir,mknod} each begin with a call to may_create(), which
returns EEXIST if the object already exists.

This check is therefore unnecessary.

(In the NFSv2 case, nfsd_proc_create also has such a check.  Contrary to
RFC 1094, our code seems to believe that a CREATE of an existing file
should succeed.  I'm leaving that behavior alone.)

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

parent b44061d0

fs/nfsd/vfs.c

+0 −10

Original line number	Diff line number	Diff line
		@@ -1157,17 +1157,7 @@ nfsd_create_locked(struct svc_rqst rqstp, struct svc_fh fhp,
		err = nfserr_io;
		goto out;
		}
		/*
		* Make sure the child dentry is still negative ...
		*/
		err = nfserr_exist;
		if (d_really_is_positive(dchild)) {
		dprintk("nfsd_create: dentry %pd/%pd not negative!\n",
		dentry, dchild);
		goto out;
		}

		/* Now let's see if we actually have permissions to create */
		err = nfsd_permission(rqstp, fhp->fh_export, dentry, NFSD_MAY_CREATE);
		if (err)
		goto out;