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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: 1d658336b0 ("SUNRPC: Add RPC based upcall mechanism for RPCGSS auth")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2022-05-07 13:53:59 -04:00
parent 3d1b0d3514
commit fd13359f54
3 changed files with 35 additions and 0 deletions
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1
include/linux/sunrpc/clnt.h
View File

@ -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 *,

1
net/sunrpc/auth_gss/gss_rpc_upcall.c
View File

@ -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;

33
net/sunrpc/clnt.c
View File

@ -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;