The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From fd13359f54ee854f00134abc6be32da94ec53dbf Mon Sep 17 00:00:00 2001 From: Trond Myklebust trond.myklebust@hammerspace.com Date: Sat, 7 May 2022 13:53:59 -0400 Subject: [PATCH] SUNRPC: Ensure that the gssproxy client can start in a connected state
Ensure that the gssproxy client connects to the server from the gssproxy daemon process context so that the AF_LOCAL socket connection is done using the correct path and namespaces.
Fixes: 1d658336b05f ("SUNRPC: Add RPC based upcall mechanism for RPCGSS auth") Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust trond.myklebust@hammerspace.com
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index 267b7aeaf1a6..90501404fa49 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -160,6 +160,7 @@ struct rpc_add_xprt_test { #define RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT (1UL << 9) #define RPC_CLNT_CREATE_SOFTERR (1UL << 10) #define RPC_CLNT_CREATE_REUSEPORT (1UL << 11) +#define RPC_CLNT_CREATE_CONNECTED (1UL << 12)
struct rpc_clnt *rpc_create(struct rpc_create_args *args); struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *, diff --git a/net/sunrpc/auth_gss/gss_rpc_upcall.c b/net/sunrpc/auth_gss/gss_rpc_upcall.c index 61c276bddaf2..f549e4c05def 100644 --- a/net/sunrpc/auth_gss/gss_rpc_upcall.c +++ b/net/sunrpc/auth_gss/gss_rpc_upcall.c @@ -98,6 +98,7 @@ static int gssp_rpc_create(struct net *net, struct rpc_clnt **_clnt) * done without the correct namespace: */ .flags = RPC_CLNT_CREATE_NOPING | + RPC_CLNT_CREATE_CONNECTED | RPC_CLNT_CREATE_NO_IDLE_TIMEOUT }; struct rpc_clnt *clnt; diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 98133aa54f19..e2c6eca0271b 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -76,6 +76,7 @@ static int rpc_encode_header(struct rpc_task *task, static int rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr); static int rpc_ping(struct rpc_clnt *clnt); +static int rpc_ping_noreply(struct rpc_clnt *clnt); static void rpc_check_timeout(struct rpc_task *task);
static void rpc_register_client(struct rpc_clnt *clnt) @@ -483,6 +484,12 @@ static struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args, rpc_shutdown_client(clnt); return ERR_PTR(err); } + } else if (args->flags & RPC_CLNT_CREATE_CONNECTED) { + int err = rpc_ping_noreply(clnt); + if (err != 0) { + rpc_shutdown_client(clnt); + return ERR_PTR(err); + } }
clnt->cl_softrtry = 1; @@ -2709,6 +2716,10 @@ static const struct rpc_procinfo rpcproc_null = { .p_decode = rpcproc_decode_null, };
+static const struct rpc_procinfo rpcproc_null_noreply = { + .p_encode = rpcproc_encode_null, +}; + static void rpc_null_call_prepare(struct rpc_task *task, void *data) { @@ -2762,6 +2773,28 @@ static int rpc_ping(struct rpc_clnt *clnt) return status; }
+static int rpc_ping_noreply(struct rpc_clnt *clnt) +{ + struct rpc_message msg = { + .rpc_proc = &rpcproc_null_noreply, + }; + struct rpc_task_setup task_setup_data = { + .rpc_client = clnt, + .rpc_message = &msg, + .callback_ops = &rpc_null_ops, + .flags = RPC_TASK_SOFT | RPC_TASK_SOFTCONN | RPC_TASK_NULLCREDS, + }; + struct rpc_task *task; + int status; + + task = rpc_run_task(&task_setup_data); + if (IS_ERR(task)) + return PTR_ERR(task); + status = task->tk_status; + rpc_put_task(task); + return status; +} + struct rpc_cb_add_xprt_calldata { struct rpc_xprt_switch *xps; struct rpc_xprt *xprt;