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author | Patrick McHardy <kaber@trash.net> | 2008-07-05 23:40:21 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2008-07-05 23:40:21 -0700 |
commit | fb0305ce1b03f6ff17f84f2c63daccecb45f2805 (patch) | |
tree | cd0a024459000123cd45b6862b8eb5c7789a72a0 /net/sched/sch_fifo.c | |
parent | aee18a8cf28808b7302ef698d77fa73883e60f1b (diff) | |
download | linux-stable-fb0305ce1b03f6ff17f84f2c63daccecb45f2805.tar.gz linux-stable-fb0305ce1b03f6ff17f84f2c63daccecb45f2805.tar.bz2 linux-stable-fb0305ce1b03f6ff17f84f2c63daccecb45f2805.zip |
net-sched: consolidate default fifo qdisc setup
Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_fifo.c')
-rw-r--r-- | net/sched/sch_fifo.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/net/sched/sch_fifo.c b/net/sched/sch_fifo.c index 95ed48221652..82d7d7bbbb16 100644 --- a/net/sched/sch_fifo.c +++ b/net/sched/sch_fifo.c @@ -107,3 +107,45 @@ struct Qdisc_ops bfifo_qdisc_ops __read_mostly = { .owner = THIS_MODULE, }; EXPORT_SYMBOL(bfifo_qdisc_ops); + +/* Pass size change message down to embedded FIFO */ +int fifo_set_limit(struct Qdisc *q, unsigned int limit) +{ + struct nlattr *nla; + int ret = -ENOMEM; + + /* Hack to avoid sending change message to non-FIFO */ + if (strncmp(q->ops->id + 1, "fifo", 4) != 0) + return 0; + + nla = kmalloc(nla_attr_size(sizeof(struct tc_fifo_qopt)), GFP_KERNEL); + if (nla) { + nla->nla_type = RTM_NEWQDISC; + nla->nla_len = nla_attr_size(sizeof(struct tc_fifo_qopt)); + ((struct tc_fifo_qopt *)nla_data(nla))->limit = limit; + + ret = q->ops->change(q, nla); + kfree(nla); + } + return ret; +} +EXPORT_SYMBOL(fifo_set_limit); + +struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops, + unsigned int limit) +{ + struct Qdisc *q; + int err = -ENOMEM; + + q = qdisc_create_dflt(sch->dev, ops, TC_H_MAKE(sch->handle, 1)); + if (q) { + err = fifo_set_limit(q, limit); + if (err < 0) { + qdisc_destroy(q); + q = NULL; + } + } + + return q ? : ERR_PTR(err); +} +EXPORT_SYMBOL(fifo_create_dflt); |