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Date: Mon, 14 Jul 2008 16:00:29 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
Subject: [PATCH 12/14]: pkt_sched: Make Qdisc_class_ops->delete()
validate+commit.
This is necessary to allow delete operations to become multiqueue
aware.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
include/net/sch_generic.h | 7 +++++--
net/sched/sch_api.c | 6 ++++--
net/sched/sch_atm.c | 14 +++++++++-----
net/sched/sch_cbq.c | 18 ++++++++++++------
net/sched/sch_dsmark.c | 13 +++++++++----
net/sched/sch_hfsc.c | 16 +++++++++++-----
net/sched/sch_htb.c | 29 ++++++++++++++++++-----------
net/sched/sch_netem.c | 9 +++++++--
net/sched/sch_prio.c | 8 ++++++--
net/sched/sch_red.c | 10 ++++++++--
net/sched/sch_tbf.c | 10 ++++++++--
11 files changed, 97 insertions(+), 43 deletions(-)
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 150ecd0..b17dece 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -70,8 +70,11 @@ struct Qdisc_class_ops
unsigned long (*get)(struct Qdisc *, u32 classid);
void (*put)(struct Qdisc *, unsigned long);
int (*change)(struct Qdisc *, u32, u32,
- struct nlattr **, unsigned long *);
- int (*delete)(struct Qdisc *, unsigned long);
+ struct nlattr **, unsigned long *);
+ int (*validate_delete)(struct Qdisc *,
+ unsigned long);
+ void (*commit_delete)(struct Qdisc *,
+ unsigned long);
void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
/* Filter manipulation */
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 8473719..5230d2d 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1594,9 +1594,11 @@ 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);
- if (err == 0)
+ err = cops->validate_delete(q, cl);
+ if (!err) {
+ cops->commit_delete(q, cl);
tclass_notify(skb, n, q, cl, RTM_DELTCLASS);
+ }
goto out;
case RTM_GETTCLASS:
err = tclass_notify(skb, n, q, cl, RTM_NEWTCLASS);
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index c084050..c240275 100644
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -339,12 +339,11 @@ err_out:
return error;
}
-static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
+static int atm_tc_validate_delete(struct Qdisc *sch, unsigned long arg)
{
+ struct atm_flow_data *flow = (struct atm_flow_data *) arg;
struct atm_qdisc_data *p = qdisc_priv(sch);
- struct atm_flow_data *flow = (struct atm_flow_data *)arg;
- pr_debug("atm_tc_delete(sch %p,[qdisc %p],flow %p)\n", sch, p, flow);
if (!find_flow(qdisc_priv(sch), flow))
return -EINVAL;
if (flow->filter_list || flow == &p->link)
@@ -359,10 +358,14 @@ static int atm_tc_delete(struct Qdisc *sch, unsigned long arg)
}
if (flow->ref > 2)
return -EBUSY; /* catch references via excess, etc. */
- atm_tc_put(sch, arg);
return 0;
}
+static void atm_tc_commit_delete(struct Qdisc *sch, unsigned long arg)
+{
+ atm_tc_put(sch, arg);
+}
+
static void atm_tc_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
@@ -691,7 +694,8 @@ static const struct Qdisc_class_ops atm_class_ops = {
.get = atm_tc_get,
.put = atm_tc_put,
.change = atm_tc_change,
- .delete = atm_tc_delete,
+ .validate_delete= atm_tc_validate_delete,
+ .commit_delete = atm_tc_commit_delete,
.walk = atm_tc_walk,
.tcf_chain = atm_tc_find_tcf,
.bind_tcf = atm_tc_bind_filter,
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 2c9895a..7138a04 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1944,14 +1944,21 @@ failure:
return err;
}
-static int cbq_delete(struct Qdisc *sch, unsigned long arg)
+static int cbq_validate_delete(struct Qdisc *sch, unsigned long arg)
{
+ struct cbq_class *cl = (struct cbq_class*) arg;
struct cbq_sched_data *q = qdisc_priv(sch);
- struct cbq_class *cl = (struct cbq_class*)arg;
- unsigned int qlen;
if (cl->filters || cl->children || cl == &q->link)
return -EBUSY;
+ return 0;
+}
+
+static void cbq_commit_delete(struct Qdisc *sch, unsigned long arg)
+{
+ struct cbq_class *cl = (struct cbq_class*) arg;
+ struct cbq_sched_data *q = qdisc_priv(sch);
+ unsigned int qlen;
sch_tree_lock(sch);
@@ -1983,8 +1990,6 @@ static int cbq_delete(struct Qdisc *sch, unsigned long arg)
if (--cl->refcnt == 0)
cbq_destroy_class(sch, cl);
-
- return 0;
}
static struct tcf_proto **cbq_find_tcf(struct Qdisc *sch, unsigned long arg)
@@ -2055,7 +2060,8 @@ static const struct Qdisc_class_ops cbq_class_ops = {
.get = cbq_get,
.put = cbq_put,
.change = cbq_change_class,
- .delete = cbq_delete,
+ .validate_delete= cbq_validate_delete,
+ .commit_delete = cbq_commit_delete,
.walk = cbq_walk,
.tcf_chain = cbq_find_tcf,
.bind_tcf = cbq_bind_filter,
diff --git a/net/sched/sch_dsmark.c b/net/sched/sch_dsmark.c
index 85dec9b..03c8bcf 100644
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -161,17 +161,21 @@ errout:
return err;
}
-static int dsmark_delete(struct Qdisc *sch, unsigned long arg)
+static int dsmark_validate_delete(struct Qdisc *sch, unsigned long arg)
{
struct dsmark_qdisc_data *p = qdisc_priv(sch);
if (!dsmark_valid_index(p, arg))
return -EINVAL;
+ return 0;
+}
+
+static void dsmark_commit_delete(struct Qdisc *sch, unsigned long arg)
+{
+ struct dsmark_qdisc_data *p = qdisc_priv(sch);
p->mask[arg-1] = 0xff;
p->value[arg-1] = 0;
-
- return 0;
}
static void dsmark_walk(struct Qdisc *sch, struct qdisc_walker *walker)
@@ -495,7 +499,8 @@ static const struct Qdisc_class_ops dsmark_class_ops = {
.get = dsmark_get,
.put = dsmark_put,
.change = dsmark_change,
- .delete = dsmark_delete,
+ .validate_delete= dsmark_validate_delete,
+ .commit_delete = dsmark_commit_delete,
.walk = dsmark_walk,
.tcf_chain = dsmark_find_tcf,
.bind_tcf = dsmark_bind_filter,
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 5025de6..95a497e 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1121,14 +1121,20 @@ hfsc_destroy_class(struct Qdisc *sch, struct hfsc_class *cl)
kfree(cl);
}
-static int
-hfsc_delete_class(struct Qdisc *sch, unsigned long arg)
+static int hfsc_validate_delete_class(struct Qdisc *sch, unsigned long arg)
{
+ struct hfsc_class *cl = (struct hfsc_class *) arg;
struct hfsc_sched *q = qdisc_priv(sch);
- struct hfsc_class *cl = (struct hfsc_class *)arg;
if (cl->level > 0 || cl->filter_cnt > 0 || cl == &q->root)
return -EBUSY;
+ return 0;
+}
+
+static void hfsc_commit_delete_class(struct Qdisc *sch, unsigned long arg)
+{
+ struct hfsc_class *cl = (struct hfsc_class *) arg;
+ struct hfsc_sched *q = qdisc_priv(sch);
sch_tree_lock(sch);
@@ -1142,7 +1148,6 @@ hfsc_delete_class(struct Qdisc *sch, unsigned long arg)
hfsc_destroy_class(sch, cl);
sch_tree_unlock(sch);
- return 0;
}
static struct hfsc_class *
@@ -1733,7 +1738,8 @@ hfsc_drop(struct Qdisc *sch)
static const struct Qdisc_class_ops hfsc_class_ops = {
.change = hfsc_change_class,
- .delete = hfsc_delete_class,
+ .validate_delete= hfsc_validate_delete_class,
+ .commit_delete = hfsc_commit_delete_class,
.prepare_graft = hfsc_prepare_graft,
.commit_graft = hfsc_commit_graft,
.cancel_graft = hfsc_cancel_graft,
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 186b10b..a9cf7bb 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1263,19 +1263,26 @@ static void htb_destroy(struct Qdisc *sch)
__skb_queue_purge(&q->direct_queue);
}
-static int htb_delete(struct Qdisc *sch, unsigned long arg)
+static int htb_validate_delete(struct Qdisc *sch, unsigned long arg)
{
- struct htb_sched *q = qdisc_priv(sch);
- struct htb_class *cl = (struct htb_class *)arg;
- unsigned int qlen;
- struct Qdisc *new_q = NULL;
- int last_child = 0;
+ struct htb_class *cl = (struct htb_class *) arg;
- // TODO: why don't allow to delete subtree ? references ? does
- // tc subsys quarantee us that in htb_destroy it holds no class
- // refs so that we can remove children safely there ?
+ /* TODO: why don't allow to delete subtree? references? does
+ * tc subsys quarantee us that in htb_destroy it holds no class
+ * refs so that we can remove children safely there?
+ */
if (cl->children || cl->filter_cnt)
return -EBUSY;
+ return 0;
+}
+
+static void htb_commit_delete(struct Qdisc *sch, unsigned long arg)
+{
+ struct htb_class *cl = (struct htb_class *) arg;
+ struct htb_sched *q = qdisc_priv(sch);
+ struct Qdisc *new_q = NULL;
+ int last_child = 0;
+ unsigned int qlen;
if (!cl->level && htb_parent_last_child(cl)) {
new_q = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue,
@@ -1309,7 +1316,6 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg)
htb_destroy_class(sch, cl);
sch_tree_unlock(sch);
- return 0;
}
static void htb_put(struct Qdisc *sch, unsigned long arg)
@@ -1565,7 +1571,8 @@ static const struct Qdisc_class_ops htb_class_ops = {
.get = htb_get,
.put = htb_put,
.change = htb_change_class,
- .delete = htb_delete,
+ .validate_delete= htb_validate_delete,
+ .commit_delete = htb_commit_delete,
.walk = htb_walk,
.tcf_chain = htb_find_tcf,
.bind_tcf = htb_bind_filter,
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 50ec903..ca8bcd4 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -708,11 +708,15 @@ static int netem_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
return -ENOSYS;
}
-static int netem_delete(struct Qdisc *sch, unsigned long arg)
+static int netem_validate_delete(struct Qdisc *sch, unsigned long arg)
{
return -ENOSYS;
}
+static void netem_commit_delete(struct Qdisc *sch, unsigned long arg)
+{
+}
+
static void netem_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
if (!walker->stop) {
@@ -738,7 +742,8 @@ static const struct Qdisc_class_ops netem_class_ops = {
.get = netem_get,
.put = netem_put,
.change = netem_change_class,
- .delete = netem_delete,
+ .validate_delete= netem_validate_delete,
+ .commit_delete = netem_commit_delete,
.walk = netem_walk,
.tcf_chain = netem_find_tcf,
.dump = netem_dump_class,
diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index 42f4cf9..25e07db 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -404,7 +404,7 @@ static int prio_change(struct Qdisc *sch, u32 handle, u32 parent, struct nlattr
return 0;
}
-static int prio_delete(struct Qdisc *sch, unsigned long cl)
+static int prio_validate_delete(struct Qdisc *sch, unsigned long cl)
{
struct prio_sched_data *q = qdisc_priv(sch);
if (cl - 1 > q->bands)
@@ -412,6 +412,9 @@ static int prio_delete(struct Qdisc *sch, unsigned long cl)
return 0;
}
+static void prio_commit_delete(struct Qdisc *sch, unsigned long cl)
+{
+}
static int prio_dump_class(struct Qdisc *sch, unsigned long cl, struct sk_buff *skb,
struct tcmsg *tcm)
@@ -478,7 +481,8 @@ static const struct Qdisc_class_ops prio_class_ops = {
.get = prio_get,
.put = prio_put,
.change = prio_change,
- .delete = prio_delete,
+ .validate_delete= prio_validate_delete,
+ .commit_delete = prio_commit_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 4844865..5ad4ed0 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -374,11 +374,16 @@ static int red_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
return -ENOSYS;
}
-static int red_delete(struct Qdisc *sch, unsigned long cl)
+static int red_validate_delete(struct Qdisc *sch, unsigned long cl)
{
return -ENOSYS;
}
+static void red_commit_delete(struct Qdisc *sch, unsigned long cl)
+{
+ WARN_ON(1);
+}
+
static void red_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
if (!walker->stop) {
@@ -404,7 +409,8 @@ static const struct Qdisc_class_ops red_class_ops = {
.get = red_get,
.put = red_put,
.change = red_change_class,
- .delete = red_delete,
+ .validate_delete= red_validate_delete,
+ .commit_delete = red_commit_delete,
.walk = red_walk,
.tcf_chain = red_find_tcf,
.dump = red_dump_class,
diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index 1f34488..f9de373 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -517,11 +517,16 @@ static int tbf_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
return -ENOSYS;
}
-static int tbf_delete(struct Qdisc *sch, unsigned long arg)
+static int tbf_validate_delete(struct Qdisc *sch, unsigned long arg)
{
return -ENOSYS;
}
+static void tbf_commit_delete(struct Qdisc *sch, unsigned long arg)
+{
+ WARN_ON(1);
+}
+
static void tbf_walk(struct Qdisc *sch, struct qdisc_walker *walker)
{
if (!walker->stop) {
@@ -548,7 +553,8 @@ static const struct Qdisc_class_ops tbf_class_ops =
.get = tbf_get,
.put = tbf_put,
.change = tbf_change_class,
- .delete = tbf_delete,
+ .validate_delete= tbf_validate_delete,
+ .commit_delete = tbf_commit_delete,
.walk = tbf_walk,
.tcf_chain = tbf_find_tcf,
.dump = tbf_dump_class,
--
1.5.6.2.255.gbed62
--
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