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[PKT_SCHED]: Cleanup qdisc creation and alignment macros

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Adds qdisc_alloc() to share code between qdisc_create()
and qdisc_create_dflt(). Hides the qdisc alignment behind
macros and makes use of them.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf
2005-07-05 14:15:09 -07:00
committed by David S. Miller
parent e41a33e6ec
commit 3d54b82fdf
4 changed files with 37 additions and 47 deletions
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41
net/sched/sch_api.c
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@@ -399,10 +399,8 @@ qdisc_create(struct net_device *dev, u32 handle, struct rtattr **tca, int *errp)
{
int err;
struct rtattr *kind = tca[TCA_KIND-1];
void *p = NULL;
struct Qdisc *sch;
struct Qdisc_ops *ops;
int size;
ops = qdisc_lookup_ops(kind);
#ifdef CONFIG_KMOD
@@ -437,43 +435,23 @@ qdisc_create(struct net_device *dev, u32 handle, struct rtattr **tca, int *errp)
if (ops == NULL)
goto err_out;
/* ensure that the Qdisc and the private data are 32-byte aligned */
size = ((sizeof(*sch) + QDISC_ALIGN_CONST) & ~QDISC_ALIGN_CONST);
size += ops->priv_size + QDISC_ALIGN_CONST;
p = kmalloc(size, GFP_KERNEL);
err = -ENOBUFS;
if (!p)
sch = qdisc_alloc(dev, ops);
if (IS_ERR(sch)) {
err = PTR_ERR(sch);
goto err_out2;
memset(p, 0, size);
sch = (struct Qdisc *)(((unsigned long)p + QDISC_ALIGN_CONST)
& ~QDISC_ALIGN_CONST);
sch->padded = (char *)sch - (char *)p;
}
INIT_LIST_HEAD(&sch->list);
skb_queue_head_init(&sch->q);
if (handle == TC_H_INGRESS)
if (handle == TC_H_INGRESS) {
sch->flags |= TCQ_F_INGRESS;
sch->ops = ops;
sch->enqueue = ops->enqueue;
sch->dequeue = ops->dequeue;
sch->dev = dev;
dev_hold(dev);
atomic_set(&sch->refcnt, 1);
sch->stats_lock = &dev->queue_lock;
if (handle == 0) {
handle = TC_H_MAKE(TC_H_INGRESS, 0);
} else if (handle == 0) {
handle = qdisc_alloc_handle(dev);
err = -ENOMEM;
if (handle == 0)
goto err_out3;
}
if (handle == TC_H_INGRESS)
sch->handle =TC_H_MAKE(TC_H_INGRESS, 0);
else
sch->handle = handle;
sch->handle = handle;
if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS-1])) == 0) {
qdisc_lock_tree(dev);
@@ -489,12 +467,11 @@ qdisc_create(struct net_device *dev, u32 handle, struct rtattr **tca, int *errp)
}
err_out3:
dev_put(dev);
kfree((char *) sch - sch->padded);
err_out2:
module_put(ops->owner);
err_out:
*errp = err;
if (p)
kfree(p);
return NULL;
}