diff options
| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-07-11 23:33:12 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-07-12 20:14:54 +0300 |
| commit | a101b043c44dfcb63bed7f29a675e9fa0259005e (patch) | |
| tree | fee002167b713916d0eb068551a25911891660e6 | |
| parent | 347543e64082782379627cb21162cb859590f3c7 (diff) | |
| download | linux-a101b043c44dfcb63bed7f29a675e9fa0259005e.tar.xz | |
SUNRPC: Fix transport accounting when caller specifies an rpc_xprt
Ensure that we do the required accounting for the round robin queue
when the caller to rpc_init_task() has passed in a transport to be
used.
Reported-by: Olga Kornievskaia <aglo@umich.edu>
Reported-by: Neil Brown <neilb@suse.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
| -rw-r--r-- | include/linux/sunrpc/clnt.h | 2 | ||||
| -rw-r--r-- | net/sunrpc/clnt.c | 42 | ||||
| -rw-r--r-- | net/sunrpc/sched.c | 3 |
3 files changed, 24 insertions, 23 deletions
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index 4619098affa3..4e070e00c143 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -164,6 +164,8 @@ void rpc_shutdown_client(struct rpc_clnt *); void rpc_release_client(struct rpc_clnt *); void rpc_task_release_transport(struct rpc_task *); void rpc_task_release_client(struct rpc_task *); +struct rpc_xprt *rpc_task_get_xprt(struct rpc_clnt *clnt, + struct rpc_xprt *xprt); int rpcb_create_local(struct net *); void rpcb_put_local(struct net *); diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index d599fab8adcb..383555d2b522 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -978,11 +978,10 @@ out: } EXPORT_SYMBOL_GPL(rpc_bind_new_program); -static struct rpc_xprt * -rpc_task_get_xprt(struct rpc_clnt *clnt) +struct rpc_xprt * +rpc_task_get_xprt(struct rpc_clnt *clnt, struct rpc_xprt *xprt) { struct rpc_xprt_switch *xps; - struct rpc_xprt *xprt= xprt_iter_get_next(&clnt->cl_xpi); if (!xprt) return NULL; @@ -995,24 +994,6 @@ rpc_task_get_xprt(struct rpc_clnt *clnt) return xprt; } -static struct rpc_xprt * -rpc_task_get_first_xprt(struct rpc_clnt *clnt) -{ - struct rpc_xprt_switch *xps; - struct rpc_xprt *xprt; - - rcu_read_lock(); - xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); - if (xprt) { - atomic_long_inc(&xprt->queuelen); - xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch); - atomic_long_inc(&xps->xps_queuelen); - } - rcu_read_unlock(); - - return xprt; -} - static void rpc_task_release_xprt(struct rpc_clnt *clnt, struct rpc_xprt *xprt) { @@ -1057,6 +1038,23 @@ void rpc_task_release_client(struct rpc_task *task) } } +static struct rpc_xprt * +rpc_task_get_first_xprt(struct rpc_clnt *clnt) +{ + struct rpc_xprt *xprt; + + rcu_read_lock(); + xprt = xprt_get(rcu_dereference(clnt->cl_xprt)); + rcu_read_unlock(); + return rpc_task_get_xprt(clnt, xprt); +} + +static struct rpc_xprt * +rpc_task_get_next_xprt(struct rpc_clnt *clnt) +{ + return rpc_task_get_xprt(clnt, xprt_iter_get_next(&clnt->cl_xpi)); +} + static void rpc_task_set_transport(struct rpc_task *task, struct rpc_clnt *clnt) { @@ -1065,7 +1063,7 @@ void rpc_task_set_transport(struct rpc_task *task, struct rpc_clnt *clnt) if (task->tk_flags & RPC_TASK_NO_ROUND_ROBIN) task->tk_xprt = rpc_task_get_first_xprt(clnt); else - task->tk_xprt = rpc_task_get_xprt(clnt); + task->tk_xprt = rpc_task_get_next_xprt(clnt); } static diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index 8a0779e963f9..1f275aba786f 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -1092,7 +1092,8 @@ static void rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *ta /* Initialize workqueue for async tasks */ task->tk_workqueue = task_setup_data->workqueue; - task->tk_xprt = xprt_get(task_setup_data->rpc_xprt); + task->tk_xprt = rpc_task_get_xprt(task_setup_data->rpc_client, + xprt_get(task_setup_data->rpc_xprt)); task->tk_op_cred = get_rpccred(task_setup_data->rpc_op_cred); |