[PATCH 1/2] nfsd: set the response bitmask for an EXCLUSIVE CREATE

[Jeff Layton <jlayton@redhat.com>]

RFC 3530 says:

 If the server uses an attribute to store the exclusive
 create verifier, it will signify which attribute by setting the
 appropriate bit in the attribute mask that is returned in the
 results.

Linux uses the atime and mtime to store the verifier, but sends a zeroed out
bitmask back to the client. This patch makes sure that we set the correct
bits in the bitmask in this situation.

Signed-off-by: Jeff Layton <jlayton@redhat.com>

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 8522729..da20674 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -99,7 +99,15 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o
 		status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
 					open->op_fname.len, &open->op_iattr,
 					&resfh, open->op_createmode,
-					(u32 *)open->op_verf.data, &open->op_truncate, &created);
+					(u32 *)open->op_verf.data,
+					&open->op_truncate, &created);
+
+		/* If we ever decide to use different attrs to store the
+		 * verifier in nfsd_create_v3, then we'll need to change this
+		 */
+		if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
+			open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
+						FATTR4_WORD1_TIME_MODIFY);
 	} else {
 		status = nfsd_lookup(rqstp, current_fh,
 				     open->op_fname.data, open->op_fname.len, &resfh);