nfs4: flex_file: ignore synthetic uid/gid for tightly coupled DSes

for tightly coupled DSes client must ignore provided synthetic uid and
gid as stated in draft-ietf-nfsv4-flex-files-19#section-5.1.

Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index 59aa049..74d8d53 100644 (file)
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -453,7 +453,7 @@ ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg, u32 ds_idx,
        struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
        struct rpc_cred *cred;
 
-       if (mirror) {
+       if (mirror && !mirror->mirror_ds->ds_versions[0].tightly_coupled) {
                cred = ff_layout_get_mirror_cred(mirror, lseg->pls_range.iomode);
                if (!cred)
                        cred = get_rpccred(mdscred);