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| author | Thomas Graf <tgraf@suug.ch> | 2005-06-18 22:58:53 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-06-18 22:58:53 -0700 |
| commit | f87a9c3ddf08c10d8427bcedf3f53098113136d0 (patch) | |
| tree | 69d791f5e29399793667f327c2e2d591d180bbe7 /net/sched | |
| parent | 321090e7a468ab33917a0af839a3ae923b1c1bc5 (diff) | |
| download | talos-obmc-linux-f87a9c3ddf08c10d8427bcedf3f53098113136d0.tar.gz talos-obmc-linux-f87a9c3ddf08c10d8427bcedf3f53098113136d0.zip | |
[PKT_SCHED]: Cleanup pfifo_fast qdisc and remove unnecessary code
Removes the skb trimming code which is not needed since we never
touch the skb upon failure. Removes unnecessary initializers,
and simplifies the code a bit.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_generic.c | 34 |
1 files changed, 14 insertions, 20 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index a08a98e7b943..8bb7c47191ea 100644 --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c @@ -311,6 +311,8 @@ static const u8 prio2band[TC_PRIO_MAX+1] = generic prio+fifo combination. */ +#define PFIFO_FAST_BANDS 3 + static inline struct sk_buff_head *prio2list(struct sk_buff *skb, struct Qdisc *qdisc) { @@ -318,8 +320,7 @@ static inline struct sk_buff_head *prio2list(struct sk_buff *skb, return list + prio2band[skb->priority & TC_PRIO_MAX]; } -static int -pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc* qdisc) +static int pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc* qdisc) { struct sk_buff_head *list = prio2list(skb, qdisc); @@ -331,36 +332,34 @@ pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc* qdisc) return qdisc_drop(skb, qdisc); } -static struct sk_buff * -pfifo_fast_dequeue(struct Qdisc* qdisc) +static struct sk_buff *pfifo_fast_dequeue(struct Qdisc* qdisc) { int prio; struct sk_buff_head *list = qdisc_priv(qdisc); - for (prio = 0; prio < 3; prio++, list++) { + for (prio = 0; prio < PFIFO_FAST_BANDS; prio++, list++) { struct sk_buff *skb = __qdisc_dequeue_head(qdisc, list); if (skb) { qdisc->q.qlen--; return skb; } } + return NULL; } -static int -pfifo_fast_requeue(struct sk_buff *skb, struct Qdisc* qdisc) +static int pfifo_fast_requeue(struct sk_buff *skb, struct Qdisc* qdisc) { qdisc->q.qlen++; return __qdisc_requeue(skb, qdisc, prio2list(skb, qdisc)); } -static void -pfifo_fast_reset(struct Qdisc* qdisc) +static void pfifo_fast_reset(struct Qdisc* qdisc) { int prio; struct sk_buff_head *list = qdisc_priv(qdisc); - for (prio=0; prio < 3; prio++) + for (prio = 0; prio < PFIFO_FAST_BANDS; prio++) __qdisc_reset_queue(qdisc, list + prio); qdisc->qstats.backlog = 0; @@ -369,35 +368,30 @@ pfifo_fast_reset(struct Qdisc* qdisc) static int pfifo_fast_dump(struct Qdisc *qdisc, struct sk_buff *skb) { - unsigned char *b = skb->tail; - struct tc_prio_qopt opt; + struct tc_prio_qopt opt = { .bands = PFIFO_FAST_BANDS }; - opt.bands = 3; memcpy(&opt.priomap, prio2band, TC_PRIO_MAX+1); RTA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt); return skb->len; rtattr_failure: - skb_trim(skb, b - skb->data); return -1; } static int pfifo_fast_init(struct Qdisc *qdisc, struct rtattr *opt) { - int i; + int prio; struct sk_buff_head *list = qdisc_priv(qdisc); - for (i=0; i<3; i++) - skb_queue_head_init(list+i); + for (prio = 0; prio < PFIFO_FAST_BANDS; prio++) + skb_queue_head_init(list + prio); return 0; } static struct Qdisc_ops pfifo_fast_ops = { - .next = NULL, - .cl_ops = NULL, .id = "pfifo_fast", - .priv_size = 3 * sizeof(struct sk_buff_head), + .priv_size = PFIFO_FAST_BANDS * sizeof(struct sk_buff_head), .enqueue = pfifo_fast_enqueue, .dequeue = pfifo_fast_dequeue, .requeue = pfifo_fast_requeue, |
