[PATCH 5/7] nfsd: remove unnecessary positive-dentry check

J. Bruce Fields
2016-07-22T17:50:54Z

From: "J. Bruce Fields" <bfields@redhat.com>

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>
---
fs/nfsd/vfs.c | 10 ----------
1 file changed, 10 deletions(-)

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 9c7830cdaeda..d45b39b408a1 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -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;
--
2.7.4