From 3d54b82fdf0ca79608f61448fb8ab92676487645 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 5 Jul 2005 14:15:09 -0700 Subject: [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 Signed-off-by: David S. Miller --- net/sched/sch_generic.c | 35 ++++++++++++++++++++++++----------- 1 file changed, 24 insertions(+), 11 deletions(-) (limited to 'net/sched/sch_generic.c') diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index 7683b34dc6a9..73e218e646ac 100644 --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c @@ -395,24 +395,23 @@ static struct Qdisc_ops pfifo_fast_ops = { .owner = THIS_MODULE, }; -struct Qdisc * qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops) +struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops) { void *p; struct Qdisc *sch; - int size; + unsigned int size; + int err = -ENOBUFS; /* 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; + size = QDISC_ALIGN(sizeof(*sch)); + size += ops->priv_size + (QDISC_ALIGNTO - 1); p = kmalloc(size, GFP_KERNEL); if (!p) - return NULL; + goto errout; memset(p, 0, size); - - sch = (struct Qdisc *)(((unsigned long)p + QDISC_ALIGN_CONST) - & ~QDISC_ALIGN_CONST); - sch->padded = (char *)sch - (char *)p; + sch = (struct Qdisc *) QDISC_ALIGN((unsigned long) p); + sch->padded = (char *) sch - (char *) p; INIT_LIST_HEAD(&sch->list); skb_queue_head_init(&sch->q); @@ -423,11 +422,24 @@ struct Qdisc * qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops) dev_hold(dev); sch->stats_lock = &dev->queue_lock; atomic_set(&sch->refcnt, 1); + + return sch; +errout: + return ERR_PTR(-err); +} + +struct Qdisc * qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops) +{ + struct Qdisc *sch; + + sch = qdisc_alloc(dev, ops); + if (IS_ERR(sch)) + goto errout; + if (!ops->init || ops->init(sch, NULL) == 0) return sch; - dev_put(dev); - kfree(p); +errout: return NULL; } @@ -591,6 +603,7 @@ EXPORT_SYMBOL(__netdev_watchdog_up); EXPORT_SYMBOL(noop_qdisc); EXPORT_SYMBOL(noop_qdisc_ops); EXPORT_SYMBOL(qdisc_create_dflt); +EXPORT_SYMBOL(qdisc_alloc); EXPORT_SYMBOL(qdisc_destroy); EXPORT_SYMBOL(qdisc_reset); EXPORT_SYMBOL(qdisc_restart); -- cgit v1.2.3-59-g8ed1b