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SUNRPC: Kill rpc_clnt->cl_dead

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Its use is at best racy, and there is only one user (lockd), which has
additional locking that makes the whole thing redundant.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2007-06-09 19:39:12 -04:00
parent 34f52e3591
commit 848f1fe6be
2 changed files with 4 additions and 17 deletions
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3
include/linux/sunrpc/clnt.h
View File

@ -45,8 +45,7 @@ struct rpc_clnt {
cl_intr : 1,/* interruptible */
cl_discrtry : 1,/* disconnect before retry */
cl_autobind : 1,/* use getport() */
cl_oneshot : 1,/* dispose after use */
cl_dead : 1;/* abandoned */
cl_oneshot : 1;/* dispose after use */
struct rpc_rtt * cl_rtt; /* RTO estimator data */

18
net/sunrpc/clnt.c
View File

@ -286,7 +286,6 @@ rpc_clone_client(struct rpc_clnt *clnt)
/* Turn off autobind on clones */
new->cl_autobind = 0;
new->cl_oneshot = 0;
new->cl_dead = 0;
INIT_LIST_HEAD(&new->cl_tasks);
spin_lock_init(&new->cl_lock);
rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
@ -305,9 +304,8 @@ out_no_clnt:
/*
* Properly shut down an RPC client, terminating all outstanding
* requests. Note that we must be certain that cl_oneshot and
* cl_dead are cleared, or else the client would be destroyed
* when the last task releases it.
* requests. Note that we must be certain that cl_oneshot is cleared,
* or else the client would be destroyed when the last task releases it.
*/
int
rpc_shutdown_client(struct rpc_clnt *clnt)
@ -318,7 +316,6 @@ rpc_shutdown_client(struct rpc_clnt *clnt)
while (!list_empty(&clnt->cl_tasks)) {
/* Don't let rpc_release_client destroy us */
clnt->cl_oneshot = 0;
clnt->cl_dead = 0;
rpc_killall_tasks(clnt);
wait_event_timeout(destroy_wait,
list_empty(&clnt->cl_tasks), 1*HZ);
@ -369,7 +366,7 @@ rpc_release_client(struct rpc_clnt *clnt)
if (list_empty(&clnt->cl_tasks))
wake_up(&destroy_wait);
if (clnt->cl_oneshot || clnt->cl_dead)
if (clnt->cl_oneshot)
rpc_destroy_client(clnt);
kref_put(&clnt->cl_kref, rpc_free_client);
}
@ -483,10 +480,6 @@ int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
sigset_t oldset;
int status;
/* If this client is slain all further I/O fails */
if (clnt->cl_dead)
return -EIO;
BUG_ON(flags & RPC_TASK_ASYNC);
task = rpc_new_task(clnt, flags, &rpc_default_ops, NULL);
@ -519,11 +512,6 @@ rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags,
sigset_t oldset;
int status;
/* If this client is slain all further I/O fails */
status = -EIO;
if (clnt->cl_dead)
goto out_release;
flags |= RPC_TASK_ASYNC;
/* Create/initialize a new RPC task */