NFSD: Check layout type when returning client layouts

According to RFC5661:
" When lr_returntype is LAYOUTRETURN4_FSID, the current filehandle is used
to identify the file system and all layouts matching the client ID, the fsid of the file system, lora_layout_type, and lora_iomode are returned. When lr_returntype is LAYOUTRETURN4_ALL, all layouts matching the client ID, lora_layout_type, and lora_iomode are returned and the current filehandle is not used. "

When returning client layouts, always check layout type.

---
 fs/nfsd/nfs4layouts.c | 3 +++
 1 file changed, 3 insertions(+)

index 3c1bfa1..44341d6 100644
@@ -513,6 +513,9 @@ nfsd4_return_client_layouts(struct svc_rqst *rqstp,
 
 	spin_lock(&clp->cl_lock);
 	list_for_each_entry_safe(ls, n, &clp->cl_lo_states, ls_perclnt) {
+		if (ls->ls_layout_type != lrp->lr_layout_type)
+			continue;
+
 		if (lrp->lr_return_type == RETURN_FSID &&
 		    !fh_fsid_match(&ls->ls_stid.sc_file->fi_fhandle,
 				   &cstate->current_fh.fh_handle))

2.3.3

Looks good,