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SUNRPC: Introduce transport switch callout for pluggable rpcbind

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Introduce a clean transport switch API for plugging in different types of
rpcbind mechanisms.  For instance, rpcbind can cleanly replace the
existing portmapper client, or a transport can choose to implement RPC
binding any way it likes.

Test plan:
Destructive testing (unplugging the network temporarily).  Connectathon
with UDP and TCP.  NFSv2/3 and NFSv4 mounting should be carefully checked.
Probably need to rig a server where certain services aren't running, or
that returns an error for some typical operation.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2006-08-22 20:06:16 -04:00 committed by Trond Myklebust
parent 5b1eacbcd7
commit bbf7c1dd2a
5 changed files with 7 additions and 5 deletions
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2
include/linux/sunrpc/clnt.h
View File

@ -106,7 +106,7 @@ struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
int rpc_shutdown_client(struct rpc_clnt *);
int rpc_destroy_client(struct rpc_clnt *);
void rpc_release_client(struct rpc_clnt *);
void rpc_getport(struct rpc_task *, struct rpc_clnt *);
void rpc_getport(struct rpc_task *);
int rpc_register(u32, u32, int, unsigned short, int *);
void rpc_call_setup(struct rpc_task *, struct rpc_message *, int);

1
include/linux/sunrpc/xprt.h
View File

@ -105,6 +105,7 @@ struct rpc_xprt_ops {
void (*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize);
int (*reserve_xprt)(struct rpc_task *task);
void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task);
void (*rpcbind)(struct rpc_task *task);
void (*set_port)(struct rpc_xprt *xprt, unsigned short port);
void (*connect)(struct rpc_task *task);
void * (*buf_alloc)(struct rpc_task *task, size_t size);

3
net/sunrpc/clnt.c
View File

@ -774,7 +774,6 @@ call_encode(struct rpc_task *task)
static void
call_bind(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_xprt *xprt = task->tk_xprt;
dprintk("RPC: %4d call_bind (status %d)\n",
@ -784,7 +783,7 @@ call_bind(struct rpc_task *task)
if (!xprt_bound(xprt)) {
task->tk_action = call_bind_status;
task->tk_timeout = xprt->bind_timeout;
rpc_getport(task, clnt);
xprt->ops->rpcbind(task);
}
}

4
net/sunrpc/pmap_clnt.c
View File

@ -81,13 +81,13 @@ static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt)
/**
* rpc_getport - obtain the port for a given RPC service on a given host
* @task: task that is waiting for portmapper request
* @clnt: controlling rpc_clnt
*
* This one can be called for an ongoing RPC request, and can be used in
* an async (rpciod) context.
*/
void rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
void rpc_getport(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_xprt *xprt = task->tk_xprt;
struct sockaddr_in *sap = &xprt->addr;
struct portmap_args *map;

2
net/sunrpc/xprtsock.c
View File

@ -1262,6 +1262,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
.set_buffer_size = xs_udp_set_buffer_size,
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
.rpcbind = rpc_getport,
.set_port = xs_set_port,
.connect = xs_connect,
.buf_alloc = rpc_malloc,
@ -1278,6 +1279,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
static struct rpc_xprt_ops xs_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
.rpcbind = rpc_getport,
.set_port = xs_set_port,
.connect = xs_connect,
.buf_alloc = rpc_malloc,