nfsd3: Check write permission after checking existence
When creating a file that already exists in a read-only directory with
O_EXCL, the NFSv3 server returns EACCES rather than EEXIST (which local
files and the NFSv4 server return). Fix this by checking the MAY_CREATE
permission only if the file does not exist. Since this already happens
in do_nfsd_create, the check in nfsd3_proc_create can simply be removed.
Signed-off-by: Ross Lagerwall <rosslagerwall@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index fa2525b..fc51f7f 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -223,11 +223,6 @@
newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
attr = &argp->attrs;
- /* Get the directory inode */
- nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_CREATE);
- if (nfserr)
- RETURN_STATUS(nfserr);
-
/* Unfudge the mode bits */
attr->ia_mode &= ~S_IFMT;
if (!(attr->ia_valid & ATTR_MODE)) {