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author | Patrick McHardy <kaber@trash.net> | 2009-09-04 06:41:16 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-09-06 02:07:02 -0700 |
commit | de6d5cdf881353f83006d5f3e28ac4fffd42145e (patch) | |
tree | edc032e4d0a868578780facdd28fb0ee277aadc3 | |
parent | 71ebe5e91947392bc276af713827eab12b6db8e4 (diff) | |
download | kernel_samsung_crespo-de6d5cdf881353f83006d5f3e28ac4fffd42145e.zip kernel_samsung_crespo-de6d5cdf881353f83006d5f3e28ac4fffd42145e.tar.gz kernel_samsung_crespo-de6d5cdf881353f83006d5f3e28ac4fffd42145e.tar.bz2 |
net_sched: make cls_ops->change and cls_ops->delete optional
Some schedulers don't support creating, changing or deleting classes.
Make the respective callbacks optionally and consistently return
-EOPNOTSUPP for unsupported operations, instead of currently either
-EOPNOTSUPP, -ENOSYS or no error.
In case of sch_prio and sch_multiq, the removed operations additionally
checked for an invalid class. This is not necessary since the class
argument can only orginate from ->get() or in case of ->change is 0
for creation of new classes, in which case ->change() incorrectly
returned -ENOENT.
As a side-effect, this patch fixes a possible (root-only) NULL pointer
function call in sch_ingress, which didn't implement a so far mandatory
->delete() operation.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | net/sched/sch_api.c | 8 | ||||
-rw-r--r-- | net/sched/sch_ingress.c | 7 | ||||
-rw-r--r-- | net/sched/sch_multiq.c | 22 | ||||
-rw-r--r-- | net/sched/sch_prio.c | 21 | ||||
-rw-r--r-- | net/sched/sch_red.c | 13 | ||||
-rw-r--r-- | net/sched/sch_sfq.c | 7 | ||||
-rw-r--r-- | net/sched/sch_tbf.c | 13 |
7 files changed, 6 insertions, 85 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index bef2d64..166fcca 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1417,7 +1417,9 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg) goto out; break; case RTM_DELTCLASS: - err = cops->delete(q, cl); + err = -EOPNOTSUPP; + if (cops->delete) + err = cops->delete(q, cl); if (err == 0) tclass_notify(skb, n, q, cl, RTM_DELTCLASS); goto out; @@ -1431,7 +1433,9 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg) } new_cl = cl; - err = cops->change(q, clid, pid, tca, &new_cl); + err = -EOPNOTSUPP; + if (cops->change) + err = cops->change(q, clid, pid, tca, &new_cl); if (err == 0) tclass_notify(skb, n, q, new_cl, RTM_NEWTCLASS); diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c index ace7902..a9e646b 100644 --- a/net/sched/sch_ingress.c +++ b/net/sched/sch_ingress.c @@ -42,12 +42,6 @@ static void ingress_put(struct Qdisc *sch, unsigned long cl) { } -static int ingress_change(struct Qdisc *sch, u32 classid, u32 parent, - struct nlattr **tca, unsigned long *arg) -{ - return 0; -} - static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker) { return; @@ -120,7 +114,6 @@ static const struct Qdisc_class_ops ingress_class_ops = { .leaf = ingress_leaf, .get = ingress_get, .put = ingress_put, - .change = ingress_change, .walk = ingress_walk, .tcf_chain = ingress_find_tcf, .bind_tcf = ingress_bind_filter, diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c index 9127312..a0ffe71 100644 --- a/net/sched/sch_multiq.c +++ b/net/sched/sch_multiq.c @@ -348,26 +348,6 @@ static void multiq_put(struct Qdisc *q, unsigned long cl) return; } -static int multiq_change(struct Qdisc *sch, u32 handle, u32 parent, - struct nlattr **tca, unsigned long *arg) -{ - unsigned long cl = *arg; - struct multiq_sched_data *q = qdisc_priv(sch); - - if (cl - 1 > q->bands) - return -ENOENT; - return 0; -} - -static int multiq_delete(struct Qdisc *sch, unsigned long cl) -{ - struct multiq_sched_data *q = qdisc_priv(sch); - if (cl - 1 > q->bands) - return -ENOENT; - return 0; -} - - static int multiq_dump_class(struct Qdisc *sch, unsigned long cl, struct sk_buff *skb, struct tcmsg *tcm) { @@ -430,8 +410,6 @@ static const struct Qdisc_class_ops multiq_class_ops = { .leaf = multiq_leaf, .get = multiq_get, .put = multiq_put, - .change = multiq_change, - .delete = multiq_delete, .walk = multiq_walk, .tcf_chain = multiq_find_tcf, .bind_tcf = multiq_bind, diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c index 94cecef..209a4ca 100644 --- a/net/sched/sch_prio.c +++ b/net/sched/sch_prio.c @@ -311,25 +311,6 @@ static void prio_put(struct Qdisc *q, unsigned long cl) return; } -static int prio_change(struct Qdisc *sch, u32 handle, u32 parent, struct nlattr **tca, unsigned long *arg) -{ - unsigned long cl = *arg; - struct prio_sched_data *q = qdisc_priv(sch); - - if (cl - 1 > q->bands) - return -ENOENT; - return 0; -} - -static int prio_delete(struct Qdisc *sch, unsigned long cl) -{ - struct prio_sched_data *q = qdisc_priv(sch); - if (cl - 1 > q->bands) - return -ENOENT; - return 0; -} - - static int prio_dump_class(struct Qdisc *sch, unsigned long cl, struct sk_buff *skb, struct tcmsg *tcm) { @@ -392,8 +373,6 @@ static const struct Qdisc_class_ops prio_class_ops = { .leaf = prio_leaf, .get = prio_get, .put = prio_put, - .change = prio_change, - .delete = prio_delete, .walk = prio_walk, .tcf_chain = prio_find_tcf, .bind_tcf = prio_bind, diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c index c27b802..a2c4d1a 100644 --- a/net/sched/sch_red.c +++ b/net/sched/sch_red.c @@ -308,17 +308,6 @@ static void red_put(struct Qdisc *sch, unsigned long arg) return; } -static int red_change_class(struct Qdisc *sch, u32 classid, u32 parentid, - struct nlattr **tca, unsigned long *arg) -{ - return -ENOSYS; -} - -static int red_delete(struct Qdisc *sch, unsigned long cl) -{ - return -ENOSYS; -} - static void red_walk(struct Qdisc *sch, struct qdisc_walker *walker) { if (!walker->stop) { @@ -336,8 +325,6 @@ static const struct Qdisc_class_ops red_class_ops = { .leaf = red_leaf, .get = red_get, .put = red_put, - .change = red_change_class, - .delete = red_delete, .walk = red_walk, .dump = red_dump_class, }; diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c index 8706920..cb21380 100644 --- a/net/sched/sch_sfq.c +++ b/net/sched/sch_sfq.c @@ -496,12 +496,6 @@ nla_put_failure: return -1; } -static int sfq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, - struct nlattr **tca, unsigned long *arg) -{ - return -EOPNOTSUPP; -} - static unsigned long sfq_get(struct Qdisc *sch, u32 classid) { return 0; @@ -560,7 +554,6 @@ static void sfq_walk(struct Qdisc *sch, struct qdisc_walker *arg) static const struct Qdisc_class_ops sfq_class_ops = { .get = sfq_get, - .change = sfq_change_class, .tcf_chain = sfq_find_tcf, .dump = sfq_dump_class, .dump_stats = sfq_dump_class_stats, diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c index 2890969..d904167 100644 --- a/net/sched/sch_tbf.c +++ b/net/sched/sch_tbf.c @@ -410,17 +410,6 @@ static void tbf_put(struct Qdisc *sch, unsigned long arg) { } -static int tbf_change_class(struct Qdisc *sch, u32 classid, u32 parentid, - struct nlattr **tca, unsigned long *arg) -{ - return -ENOSYS; -} - -static int tbf_delete(struct Qdisc *sch, unsigned long arg) -{ - return -ENOSYS; -} - static void tbf_walk(struct Qdisc *sch, struct qdisc_walker *walker) { if (!walker->stop) { @@ -439,8 +428,6 @@ static const struct Qdisc_class_ops tbf_class_ops = .leaf = tbf_leaf, .get = tbf_get, .put = tbf_put, - .change = tbf_change_class, - .delete = tbf_delete, .walk = tbf_walk, .dump = tbf_dump_class, }; |