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SUNRPC: Remove rpc_clnt->cl_count

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The kref now does most of what cl_count + cl_user used to do. The only
remaining role for cl_count is to tell us if we are in a 'shutdown'
phase. We can provide that information using a single bit field instead
of a full atomic counter.

Also rename rpc_destroy_client() to rpc_close_client(), which reflects
better what its role is these days.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2007-06-14 16:40:32 -04:00
parent 8ad7c892e1
commit 4c402b4097
4 changed files with 4 additions and 22 deletions
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4
include/linux/sunrpc/clnt.h
View File

@ -25,7 +25,6 @@ struct rpc_inode;
*/
struct rpc_clnt {
struct kref cl_kref; /* Number of references */
atomic_t cl_count; /* Number of clones */
struct list_head cl_clients; /* Global list of clients */
struct list_head cl_tasks; /* List of tasks */
spinlock_t cl_lock; /* spinlock */
@ -119,8 +118,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args);
struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
struct rpc_program *, int);
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_shutdown_client(struct rpc_clnt *);
void rpc_release_client(struct rpc_clnt *);
void rpc_register_client(struct rpc_clnt *);
void rpc_unregister_client(struct rpc_clnt *);

19
net/sunrpc/clnt.c
View File

@ -121,7 +121,6 @@ static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, s
clnt = kzalloc(sizeof(*clnt), GFP_KERNEL);
if (!clnt)
goto out_err;
atomic_set(&clnt->cl_count, 1);
clnt->cl_parent = clnt;
clnt->cl_server = clnt->cl_inline_name;
@ -270,7 +269,6 @@ rpc_clone_client(struct rpc_clnt *clnt)
new = kmemdup(clnt, sizeof(*new), GFP_KERNEL);
if (!new)
goto out_no_clnt;
atomic_set(&new->cl_count, 1);
new->cl_metrics = rpc_alloc_iostats(clnt);
if (new->cl_metrics == NULL)
goto out_no_stats;
@ -303,8 +301,7 @@ out_no_clnt:
* Properly shut down an RPC client, terminating all outstanding
* requests.
*/
int
rpc_shutdown_client(struct rpc_clnt *clnt)
void rpc_shutdown_client(struct rpc_clnt *clnt)
{
dprintk("RPC: shutting down %s client for %s\n",
clnt->cl_protname, clnt->cl_server);
@ -315,7 +312,7 @@ rpc_shutdown_client(struct rpc_clnt *clnt)
list_empty(&clnt->cl_tasks), 1*HZ);
}
return rpc_destroy_client(clnt);
rpc_release_client(clnt);
}
/*
@ -363,18 +360,6 @@ rpc_release_client(struct rpc_clnt *clnt)
kref_put(&clnt->cl_kref, rpc_free_client);
}
/*
* Delete an RPC client
*/
int
rpc_destroy_client(struct rpc_clnt *clnt)
{
if (!atomic_dec_and_test(&clnt->cl_count))
return 1;
kref_put(&clnt->cl_kref, rpc_free_client);
return 0;
}
/**
* rpc_bind_new_program - bind a new RPC program to an existing client
* @old - old rpc_client

2
net/sunrpc/rpcb_clnt.c
View File

@ -380,7 +380,7 @@ void rpcb_getport(struct rpc_task *task)
}
child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
rpc_destroy_client(rpcb_clnt);
rpc_release_client(rpcb_clnt);
if (IS_ERR(child)) {
status = -EIO;
dprintk("RPC: %5u rpcb_getport rpc_run_task failed\n",

1
net/sunrpc/sunrpc_syms.c
View File

@ -35,7 +35,6 @@ EXPORT_SYMBOL(rpc_wake_up_status);
/* RPC client functions */
EXPORT_SYMBOL(rpc_clone_client);
EXPORT_SYMBOL(rpc_bind_new_program);
EXPORT_SYMBOL(rpc_destroy_client);
EXPORT_SYMBOL(rpc_shutdown_client);
EXPORT_SYMBOL(rpc_killall_tasks);
EXPORT_SYMBOL(rpc_call_sync);