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SUNRPC: remove RPC client pipefs dentries after unregister 

Without this patch we have races:

rpc_fill_super				rpc_free_client
rpc_pipefs_event(MOUNT)			rpc_remove_pipedir
spin_lock(&rpc_client_lock);
rpc_setup_pipedir_sb
spin_unlock(&rpc_client_lock);
					spin_lock(&rpc_client_lock);
					(remove from list)
					spin_unlock(&rpc_client_lock);
					MEAMORY LEAKED

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2012-01-11 19:18:26 +04:00 committed by Trond Myklebust
parent 80df9d2022
commit f5131257f7
1 changed files with 1 additions and 1 deletions
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2
net/sunrpc/clnt.c
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@ -578,7 +578,6 @@ rpc_free_client(struct rpc_clnt *clnt)
{
dprintk("RPC: destroying %s client for %s\n",
clnt->cl_protname, clnt->cl_server);
rpc_clnt_remove_pipedir(clnt);
if (clnt->cl_parent != clnt) {
rpc_release_client(clnt->cl_parent);
goto out_free;
@ -587,6 +586,7 @@ rpc_free_client(struct rpc_clnt *clnt)
kfree(clnt->cl_server);
out_free:
rpc_unregister_client(clnt);
rpc_clnt_remove_pipedir(clnt);
rpc_free_iostats(clnt->cl_metrics);
kfree(clnt->cl_principal);
clnt->cl_metrics = NULL;