diff options
Diffstat (limited to 'net/sunrpc/rpcb_clnt.c')
| -rw-r--r-- | net/sunrpc/rpcb_clnt.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c index c62e446723ae..24e93e0a0a22 100644 --- a/net/sunrpc/rpcb_clnt.c +++ b/net/sunrpc/rpcb_clnt.c @@ -68,6 +68,7 @@ enum { #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) static void rpcb_getport_done(struct rpc_task *, void *); +static void rpcb_map_release(void *data); static struct rpc_program rpcb_program; struct rpcbind_args { @@ -80,6 +81,8 @@ struct rpcbind_args { const char * r_netid; const char * r_addr; const char * r_owner; + + int r_status; }; static struct rpc_procinfo rpcb_procedures2[]; @@ -93,14 +96,6 @@ struct rpcb_info { static struct rpcb_info rpcb_next_version[]; static struct rpcb_info rpcb_next_version6[]; -static void rpcb_map_release(void *data) -{ - struct rpcbind_args *map = data; - - xprt_put(map->r_xprt); - kfree(map); -} - static const struct rpc_call_ops rpcb_getport_ops = { .rpc_call_done = rpcb_getport_done, .rpc_release = rpcb_map_release, @@ -112,6 +107,15 @@ static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status) rpc_wake_up_status(&xprt->binding, status); } +static void rpcb_map_release(void *data) +{ + struct rpcbind_args *map = data; + + rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status); + xprt_put(map->r_xprt); + kfree(map); +} + static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr, size_t salen, int proto, u32 version, int privileged) @@ -293,17 +297,16 @@ void rpcb_getport_async(struct rpc_task *task) /* Autobind on cloned rpc clients is discouraged */ BUG_ON(clnt->cl_parent != clnt); + /* Put self on the wait queue to ensure we get notified if + * some other task is already attempting to bind the port */ + rpc_sleep_on(&xprt->binding, task, NULL); + if (xprt_test_and_set_binding(xprt)) { - status = -EAGAIN; /* tell caller to check again */ dprintk("RPC: %5u %s: waiting for another binder\n", task->tk_pid, __func__); - goto bailout_nowake; + return; } - /* Put self on queue before sending rpcbind request, in case - * rpcb_getport_done completes before we return from rpc_run_task */ - rpc_sleep_on(&xprt->binding, task, NULL); - /* Someone else may have bound if we slept */ if (xprt_bound(xprt)) { status = 0; @@ -365,15 +368,15 @@ void rpcb_getport_async(struct rpc_task *task) map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID); map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR); map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */ + map->r_status = -EIO; child = rpcb_call_async(rpcb_clnt, map, proc); rpc_release_client(rpcb_clnt); if (IS_ERR(child)) { - status = -EIO; /* rpcb_map_release() has freed the arguments */ dprintk("RPC: %5u %s: rpc_run_task failed\n", task->tk_pid, __func__); - goto bailout_nofree; + return; } rpc_put_task(child); @@ -382,7 +385,6 @@ void rpcb_getport_async(struct rpc_task *task) bailout_nofree: rpcb_wake_rpcbind_waiters(xprt, status); -bailout_nowake: task->tk_status = status; } EXPORT_SYMBOL_GPL(rpcb_getport_async); @@ -421,7 +423,7 @@ static void rpcb_getport_done(struct rpc_task *child, void *data) dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", child->tk_pid, status, map->r_port); - rpcb_wake_rpcbind_waiters(xprt, status); + map->r_status = status; } static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p, |