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authorThomas Graf <tgraf@suug.ch>2005-07-05 14:15:09 -0700
committerDavid S. Miller <davem@davemloft.net>2005-07-05 14:15:09 -0700
commit3d54b82fdf0ca79608f61448fb8ab92676487645 (patch)
tree441e7a997eca58d2d7d2d06c387667ba82937d58 /net/sched/sch_api.c
parente41a33e6ec20a0a6ac762629149e36cab5d4213f (diff)
downloadop-kernel-dev-3d54b82fdf0ca79608f61448fb8ab92676487645.zip
op-kernel-dev-3d54b82fdf0ca79608f61448fb8ab92676487645.tar.gz
[PKT_SCHED]: Cleanup qdisc creation and alignment macros
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>
Diffstat (limited to 'net/sched/sch_api.c')
-rw-r--r--net/sched/sch_api.c41
1 files changed, 9 insertions, 32 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 05e6e0a..1ef482b 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -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;
}
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