When storing a struct rpc_rqst on the slot allocation list, we currently
use the same field 'rq_list' as we use to store the request on the
receive queue. Since the structure is never on both lists at the same
time, this is OK.
However, for clarity, let's make that a union with different names for
the different lists so that we can more easily distinguish between
the two states.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
include/linux/sunrpc/xprt.h | 9 +++++++--
net/sunrpc/backchannel_rqst.c | 2 +-
net/sunrpc/xprt.c | 16 ++++++++--------
net/sunrpc/xprtrdma/backchannel.c | 2 +-
4 files changed, 17 insertions(+), 12 deletions(-)
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 4fa2af087cff..9cec2d0811f2 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -82,7 +82,11 @@ struct rpc_rqst {
struct page **rq_enc_pages; /* scratch pages for use by
gss privacy code */
void (*rq_release_snd_buf)(struct rpc_rqst *); /* release rq_enc_pages */
- struct list_head rq_list;
+
+ union {
+ struct list_head rq_list; /* Slot allocation list */
+ struct list_head rq_recv; /* Receive queue */
+ };
void *rq_buffer; /* Call XDR encode buffer */
size_t rq_callsize;
@@ -249,7 +253,8 @@ struct rpc_xprt {
struct list_head bc_pa_list; /* List of preallocated
* backchannel rpc_rqst's */
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
- struct list_head recv;
+
+ struct list_head recv_queue; /* Receive queue */
struct {
unsigned long bind_count, /* total number of binds */
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c
index 3c15a99b9700..92e9ad30ec2f 100644
--- a/net/sunrpc/backchannel_rqst.c
+++ b/net/sunrpc/backchannel_rqst.c
@@ -91,7 +91,7 @@ struct rpc_rqst *xprt_alloc_bc_req(struct rpc_xprt *xprt, gfp_t gfp_flags)
return NULL;
req->rq_xprt = xprt;
- INIT_LIST_HEAD(&req->rq_list);
+ INIT_LIST_HEAD(&req->rq_recv);
INIT_LIST_HEAD(&req->rq_bc_list);
/* Preallocate one XDR receive buffer */
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index aefa23c90a2b..0184a6aed7e3 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -708,7 +708,7 @@ static void
xprt_schedule_autodisconnect(struct rpc_xprt *xprt)
__must_hold(&xprt->transport_lock)
{
- if (list_empty(&xprt->recv) && xprt_has_timer(xprt))
+ if (list_empty(&xprt->recv_queue) && xprt_has_timer(xprt))
mod_timer(&xprt->timer, xprt->last_used + xprt->idle_timeout);
}
@@ -718,7 +718,7 @@ xprt_init_autodisconnect(struct timer_list *t)
struct rpc_xprt *xprt = from_timer(xprt, t, timer);
spin_lock(&xprt->transport_lock);
- if (!list_empty(&xprt->recv))
+ if (!list_empty(&xprt->recv_queue))
goto out_abort;
/* Reset xprt->last_used to avoid connect/autodisconnect cycling */
xprt->last_used = jiffies;
@@ -848,7 +848,7 @@ struct rpc_rqst *xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid)
{
struct rpc_rqst *entry;
- list_for_each_entry(entry, &xprt->recv, rq_list)
+ list_for_each_entry(entry, &xprt->recv_queue, rq_recv)
if (entry->rq_xid == xid) {
trace_xprt_lookup_rqst(xprt, xid, 0);
entry->rq_rtt = ktime_sub(ktime_get(), entry->rq_xtime);
@@ -919,7 +919,7 @@ xprt_request_enqueue_receive(struct rpc_task *task)
struct rpc_xprt *xprt = req->rq_xprt;
spin_lock(&xprt->queue_lock);
- if (xprt_request_data_received(task) || !list_empty(&req->rq_list)) {
+ if (xprt_request_data_received(task) || !list_empty(&req->rq_recv)) {
spin_unlock(&xprt->queue_lock);
return;
}
@@ -929,7 +929,7 @@ xprt_request_enqueue_receive(struct rpc_task *task)
sizeof(req->rq_private_buf));
/* Add request to the receive list */
- list_add_tail(&req->rq_list, &xprt->recv);
+ list_add_tail(&req->rq_recv, &xprt->recv_queue);
set_bit(RPC_TASK_NEED_RECV, &task->tk_runstate);
spin_unlock(&xprt->queue_lock);
@@ -948,7 +948,7 @@ static void
xprt_request_dequeue_receive_locked(struct rpc_task *task)
{
clear_bit(RPC_TASK_NEED_RECV, &task->tk_runstate);
- list_del_init(&task->tk_rqstp->rq_list);
+ list_del_init(&task->tk_rqstp->rq_recv);
}
/**
@@ -1337,7 +1337,7 @@ xprt_request_init(struct rpc_task *task)
struct rpc_xprt *xprt = task->tk_xprt;
struct rpc_rqst *req = task->tk_rqstp;
- INIT_LIST_HEAD(&req->rq_list);
+ INIT_LIST_HEAD(&req->rq_recv);
req->rq_timeout = task->tk_client->cl_timeout->to_initval;
req->rq_task = task;
req->rq_xprt = xprt;
@@ -1471,7 +1471,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
spin_lock_init(&xprt->queue_lock);
INIT_LIST_HEAD(&xprt->free);
- INIT_LIST_HEAD(&xprt->recv);
+ INIT_LIST_HEAD(&xprt->recv_queue);
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
spin_lock_init(&xprt->bc_pa_lock);
INIT_LIST_HEAD(&xprt->bc_pa_list);
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c
index 90adeff4c06b..40c7c7306a99 100644
--- a/net/sunrpc/xprtrdma/backchannel.c
+++ b/net/sunrpc/xprtrdma/backchannel.c
@@ -51,7 +51,7 @@ static int rpcrdma_bc_setup_reqs(struct rpcrdma_xprt *r_xprt,
rqst = &req->rl_slot;
rqst->rq_xprt = xprt;
- INIT_LIST_HEAD(&rqst->rq_list);
+ INIT_LIST_HEAD(&rqst->rq_recv);
INIT_LIST_HEAD(&rqst->rq_bc_list);
__set_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state);
spin_lock_bh(&xprt->bc_pa_lock);
--
2.17.1
