nfsd_nl_listener_set_doit() hands back the raw errno from svc_xprt_create_from_sa() and sets no extack, so a failed LISTENER_SET tells userland only "Connection refused". The usual cause is svc_setup_socket() -> svc_register() failing because the local rpcbind is not reachable, which is not guessable from the errno alone -- and since "SUNRPC: keep the first error in svc_register()" that failure is fatal on CONFIG_NFS_LOCALIO=y too.
Name the transport and the error. The message tracks err, which keeps the last failure, so a multi-listener request reports the entry whose errno is returned. The rejections in nfsd_nl_validate_listeners() other than -E2BIG are still bare; those are left alone here. Signed-off-by: Jeff Layton <[email protected]> Assisted-by: LLM --- fs/nfsd/nfsctl.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 66931caaaaed..a6ef85e6b419 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -2184,8 +2184,12 @@ int nfsd_nl_listener_set_doit(struct sk_buff *skb, struct genl_info *info) ret = svc_xprt_create_from_sa(serv, xcl_name, net, sa, 0, current_cred()); /* always save the latest error */ - if (ret < 0) + if (ret < 0) { + NL_SET_ERR_MSG_FMT(info->extack, + "cannot create %s listener: %d", + xcl_name, ret); err = ret; + } } if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) -- 2.55.0
