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SUNRPC: skip clients with program without PipeFS entries

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1) This is sane.
2) Otherwise there will be soft lockup:

do {
	rpc_get_client_for_event (clnt->cl_dentry == NULL ==> choose)
	__rpc_pipefs_event (clnt->cl_program->pipe_dir_name == NULL ==> return)
} while (1)

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2012-04-20 18:19:18 +04:00 committed by Trond Myklebust
parent a4dff1bc49
commit 7aab449e5a
1 changed files with 2 additions and 2 deletions
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4
net/sunrpc/clnt.c
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@ -184,8 +184,6 @@ static int __rpc_pipefs_event(struct rpc_clnt *clnt, unsigned long event,
switch (event) {
case RPC_PIPEFS_MOUNT:
if (clnt->cl_program->pipe_dir_name == NULL)
break;
dentry = rpc_setup_pipedir_sb(sb, clnt,
clnt->cl_program->pipe_dir_name);
BUG_ON(dentry == NULL);
@ -215,6 +213,8 @@ static struct rpc_clnt *rpc_get_client_for_event(struct net *net, int event)
spin_lock(&sn->rpc_client_lock);
list_for_each_entry(clnt, &sn->all_clients, cl_clients) {
if (clnt->cl_program->pipe_dir_name == NULL)
break;
if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) ||
((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry))
continue;