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authorTrond Myklebust <Trond.Myklebust@netapp.com>2011-07-17 16:57:32 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-07-17 16:57:32 -0400
commit21de0a955f3af29fa1100d96f66e6adade89e77a (patch)
tree0e829bc99fd3786361f78106f50e3961a5ee209b /net
parent8d9266ffe4332afc5ac9de401ef6f825b3798585 (diff)
downloadautogen-21de0a955f3af29fa1100d96f66e6adade89e77a.tar.gz
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SUNRPC: Clean up the slot table allocation
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprt.c64
1 files changed, 37 insertions, 27 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index efb8dc5ab81..ea7b3c16cdd 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -62,6 +62,7 @@
/*
* Local functions
*/
+static void xprt_init(struct rpc_xprt *xprt, struct net *net);
static void xprt_request_init(struct rpc_task *, struct rpc_xprt *);
static void xprt_connect_status(struct rpc_task *task);
static int __xprt_get_cong(struct rpc_xprt *, struct rpc_task *);
@@ -961,25 +962,42 @@ static void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req)
spin_unlock(&xprt->reserve_lock);
}
-struct rpc_xprt *xprt_alloc(struct net *net, int size, int max_req)
+static void xprt_free_all_slots(struct rpc_xprt *xprt)
+{
+ struct rpc_rqst *req;
+ while (!list_empty(&xprt->free)) {
+ req = list_first_entry(&xprt->free, struct rpc_rqst, rq_list);
+ list_del(&req->rq_list);
+ kfree(req);
+ }
+}
+
+struct rpc_xprt *xprt_alloc(struct net *net, int size, int num_prealloc)
{
struct rpc_xprt *xprt;
+ struct rpc_rqst *req;
+ int i;
xprt = kzalloc(size, GFP_KERNEL);
if (xprt == NULL)
goto out;
- atomic_set(&xprt->count, 1);
- xprt->max_reqs = max_req;
- xprt->slot = kcalloc(max_req, sizeof(struct rpc_rqst), GFP_KERNEL);
- if (xprt->slot == NULL)
+ xprt_init(xprt, net);
+
+ for (i = 0; i < num_prealloc; i++) {
+ req = kzalloc(sizeof(struct rpc_rqst), GFP_KERNEL);
+ if (!req)
+ break;
+ list_add(&req->rq_list, &xprt->free);
+ }
+ if (i < num_prealloc)
goto out_free;
+ xprt->max_reqs = num_prealloc;
- xprt->xprt_net = get_net(net);
return xprt;
out_free:
- kfree(xprt);
+ xprt_free(xprt);
out:
return NULL;
}
@@ -988,7 +1006,7 @@ EXPORT_SYMBOL_GPL(xprt_alloc);
void xprt_free(struct rpc_xprt *xprt)
{
put_net(xprt->xprt_net);
- kfree(xprt->slot);
+ xprt_free_all_slots(xprt);
kfree(xprt);
}
EXPORT_SYMBOL_GPL(xprt_free);
@@ -1091,9 +1109,9 @@ void xprt_release(struct rpc_task *task)
xprt_free_bc_request(req);
}
-static void xprt_init(struct rpc_xprt *xprt)
+static void xprt_init(struct rpc_xprt *xprt, struct net *net)
{
- struct rpc_rqst *req;
+ atomic_set(&xprt->count, 1);
spin_lock_init(&xprt->transport_lock);
spin_lock_init(&xprt->reserve_lock);
@@ -1105,12 +1123,6 @@ static void xprt_init(struct rpc_xprt *xprt)
INIT_LIST_HEAD(&xprt->bc_pa_list);
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
- INIT_WORK(&xprt->task_cleanup, xprt_autoclose);
- if (xprt_has_timer(xprt))
- setup_timer(&xprt->timer, xprt_init_autodisconnect,
- (unsigned long)xprt);
- else
- init_timer(&xprt->timer);
xprt->last_used = jiffies;
xprt->cwnd = RPC_INITCWND;
xprt->bind_index = 0;
@@ -1121,12 +1133,9 @@ static void xprt_init(struct rpc_xprt *xprt)
rpc_init_wait_queue(&xprt->resend, "xprt_resend");
rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog");
- /* initialize free list */
- for (req = &xprt->slot[xprt->max_reqs-1]; req >= &xprt->slot[0]; req--)
- list_add(&req->rq_list, &xprt->free);
-
xprt_init_xid(xprt);
+ xprt->xprt_net = get_net(net);
}
/**
@@ -1155,16 +1164,17 @@ found:
if (IS_ERR(xprt)) {
dprintk("RPC: xprt_create_transport: failed, %ld\n",
-PTR_ERR(xprt));
- return xprt;
+ goto out;
}
- if (test_and_set_bit(XPRT_INITIALIZED, &xprt->state))
- /* ->setup returned a pre-initialized xprt: */
- return xprt;
-
- xprt_init(xprt);
-
+ INIT_WORK(&xprt->task_cleanup, xprt_autoclose);
+ if (xprt_has_timer(xprt))
+ setup_timer(&xprt->timer, xprt_init_autodisconnect,
+ (unsigned long)xprt);
+ else
+ init_timer(&xprt->timer);
dprintk("RPC: created transport %p with %u slots\n", xprt,
xprt->max_reqs);
+out:
return xprt;
}