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Diffstat (limited to 'net/sched/sch_api.c')
-rw-r--r--net/sched/sch_api.c87
1 files changed, 47 insertions, 40 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 72d2c204d5f3..aba789c30a2e 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -902,7 +902,8 @@ static void qdisc_offload_graft_root(struct net_device *dev,
}
static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
- u32 portid, u32 seq, u16 flags, int event)
+ u32 portid, u32 seq, u16 flags, int event,
+ struct netlink_ext_ack *extack)
{
struct gnet_stats_basic_sync __percpu *cpu_bstats = NULL;
struct gnet_stats_queue __percpu *cpu_qstats = NULL;
@@ -970,7 +971,12 @@ static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
if (gnet_stats_finish_copy(&d) < 0)
goto nla_put_failure;
+ if (extack && extack->_msg &&
+ nla_put_string(skb, TCA_EXT_WARN_MSG, extack->_msg))
+ goto out_nlmsg_trim;
+
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
+
return skb->len;
out_nlmsg_trim:
@@ -991,7 +997,8 @@ static bool tc_qdisc_dump_ignore(struct Qdisc *q, bool dump_invisible)
static int qdisc_notify(struct net *net, struct sk_buff *oskb,
struct nlmsghdr *n, u32 clid,
- struct Qdisc *old, struct Qdisc *new)
+ struct Qdisc *old, struct Qdisc *new,
+ struct netlink_ext_ack *extack)
{
struct sk_buff *skb;
u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
@@ -1002,12 +1009,12 @@ static int qdisc_notify(struct net *net, struct sk_buff *oskb,
if (old && !tc_qdisc_dump_ignore(old, false)) {
if (tc_fill_qdisc(skb, old, clid, portid, n->nlmsg_seq,
- 0, RTM_DELQDISC) < 0)
+ 0, RTM_DELQDISC, extack) < 0)
goto err_out;
}
if (new && !tc_qdisc_dump_ignore(new, false)) {
if (tc_fill_qdisc(skb, new, clid, portid, n->nlmsg_seq,
- old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0)
+ old ? NLM_F_REPLACE : 0, RTM_NEWQDISC, extack) < 0)
goto err_out;
}
@@ -1022,10 +1029,11 @@ err_out:
static void notify_and_destroy(struct net *net, struct sk_buff *skb,
struct nlmsghdr *n, u32 clid,
- struct Qdisc *old, struct Qdisc *new)
+ struct Qdisc *old, struct Qdisc *new,
+ struct netlink_ext_ack *extack)
{
if (new || old)
- qdisc_notify(net, skb, n, clid, old, new);
+ qdisc_notify(net, skb, n, clid, old, new, extack);
if (old)
qdisc_put(old);
@@ -1105,12 +1113,12 @@ skip:
qdisc_refcount_inc(new);
rcu_assign_pointer(dev->qdisc, new ? : &noop_qdisc);
- notify_and_destroy(net, skb, n, classid, old, new);
+ notify_and_destroy(net, skb, n, classid, old, new, extack);
if (new && new->ops->attach)
new->ops->attach(new);
} else {
- notify_and_destroy(net, skb, n, classid, old, new);
+ notify_and_destroy(net, skb, n, classid, old, new, extack);
}
if (dev->flags & IFF_UP)
@@ -1141,7 +1149,7 @@ skip:
err = cops->graft(parent, cl, new, &old, extack);
if (err)
return err;
- notify_and_destroy(net, skb, n, classid, old, new);
+ notify_and_destroy(net, skb, n, classid, old, new, extack);
}
return 0;
}
@@ -1274,20 +1282,21 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
if (err)
goto err_out3;
- if (ops->init) {
- err = ops->init(sch, tca[TCA_OPTIONS], extack);
- if (err != 0)
- goto err_out5;
- }
-
if (tca[TCA_STAB]) {
stab = qdisc_get_stab(tca[TCA_STAB], extack);
if (IS_ERR(stab)) {
err = PTR_ERR(stab);
- goto err_out4;
+ goto err_out3;
}
rcu_assign_pointer(sch->stab, stab);
}
+
+ if (ops->init) {
+ err = ops->init(sch, tca[TCA_OPTIONS], extack);
+ if (err != 0)
+ goto err_out4;
+ }
+
if (tca[TCA_RATE]) {
err = -EOPNOTSUPP;
if (sch->flags & TCQ_F_MQROOT) {
@@ -1312,10 +1321,13 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
return sch;
-err_out5:
- /* ops->init() failed, we call ->destroy() like qdisc_create_dflt() */
+err_out4:
+ /* Even if ops->init() failed, we call ops->destroy()
+ * like qdisc_create_dflt().
+ */
if (ops->destroy)
ops->destroy(sch);
+ qdisc_put_stab(rtnl_dereference(sch->stab));
err_out3:
netdev_put(dev, &sch->dev_tracker);
qdisc_free(sch);
@@ -1324,16 +1336,6 @@ err_out2:
err_out:
*errp = err;
return NULL;
-
-err_out4:
- /*
- * Any broken qdiscs that would require a ops->reset() here?
- * The qdisc was never in action so it shouldn't be necessary.
- */
- qdisc_put_stab(rtnl_dereference(sch->stab));
- if (ops->destroy)
- ops->destroy(sch);
- goto err_out3;
}
static int qdisc_change(struct Qdisc *sch, struct nlattr **tca,
@@ -1509,7 +1511,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n,
if (err != 0)
return err;
} else {
- qdisc_notify(net, skb, n, clid, NULL, q);
+ qdisc_notify(net, skb, n, clid, NULL, q, NULL);
}
return 0;
}
@@ -1648,7 +1650,7 @@ replay:
}
err = qdisc_change(q, tca, extack);
if (err == 0)
- qdisc_notify(net, skb, n, clid, NULL, q);
+ qdisc_notify(net, skb, n, clid, NULL, q, extack);
return err;
create_n_graft:
@@ -1715,7 +1717,7 @@ static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
if (!tc_qdisc_dump_ignore(q, dump_invisible) &&
tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
- RTM_NEWQDISC) <= 0)
+ RTM_NEWQDISC, NULL) <= 0)
goto done;
q_idx++;
}
@@ -1737,7 +1739,7 @@ static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
if (!tc_qdisc_dump_ignore(q, dump_invisible) &&
tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
- RTM_NEWQDISC) <= 0)
+ RTM_NEWQDISC, NULL) <= 0)
goto done;
q_idx++;
}
@@ -1810,8 +1812,8 @@ done:
************************************************/
static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q,
- unsigned long cl,
- u32 portid, u32 seq, u16 flags, int event)
+ unsigned long cl, u32 portid, u32 seq, u16 flags,
+ int event, struct netlink_ext_ack *extack)
{
struct tcmsg *tcm;
struct nlmsghdr *nlh;
@@ -1846,7 +1848,12 @@ static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q,
if (gnet_stats_finish_copy(&d) < 0)
goto nla_put_failure;
+ if (extack && extack->_msg &&
+ nla_put_string(skb, TCA_EXT_WARN_MSG, extack->_msg))
+ goto out_nlmsg_trim;
+
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
+
return skb->len;
out_nlmsg_trim:
@@ -1857,7 +1864,7 @@ nla_put_failure:
static int tclass_notify(struct net *net, struct sk_buff *oskb,
struct nlmsghdr *n, struct Qdisc *q,
- unsigned long cl, int event)
+ unsigned long cl, int event, struct netlink_ext_ack *extack)
{
struct sk_buff *skb;
u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
@@ -1866,7 +1873,7 @@ static int tclass_notify(struct net *net, struct sk_buff *oskb,
if (!skb)
return -ENOBUFS;
- if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0, event) < 0) {
+ if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0, event, extack) < 0) {
kfree_skb(skb);
return -EINVAL;
}
@@ -1893,7 +1900,7 @@ static int tclass_del_notify(struct net *net,
return -ENOBUFS;
if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0,
- RTM_DELTCLASS) < 0) {
+ RTM_DELTCLASS, extack) < 0) {
kfree_skb(skb);
return -EINVAL;
}
@@ -2100,7 +2107,7 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n,
tc_bind_tclass(q, portid, clid, 0);
goto out;
case RTM_GETTCLASS:
- err = tclass_notify(net, skb, n, q, cl, RTM_NEWTCLASS);
+ err = tclass_notify(net, skb, n, q, cl, RTM_NEWTCLASS, extack);
goto out;
default:
err = -EINVAL;
@@ -2118,7 +2125,7 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n,
if (cops->change)
err = cops->change(q, clid, portid, tca, &new_cl, extack);
if (err == 0) {
- tclass_notify(net, skb, n, q, new_cl, RTM_NEWTCLASS);
+ tclass_notify(net, skb, n, q, new_cl, RTM_NEWTCLASS, extack);
/* We just create a new class, need to do reverse binding. */
if (cl != new_cl)
tc_bind_tclass(q, portid, clid, new_cl);
@@ -2140,7 +2147,7 @@ static int qdisc_class_dump(struct Qdisc *q, unsigned long cl,
return tc_fill_tclass(a->skb, q, cl, NETLINK_CB(a->cb->skb).portid,
a->cb->nlh->nlmsg_seq, NLM_F_MULTI,
- RTM_NEWTCLASS);
+ RTM_NEWTCLASS, NULL);
}
static int tc_dump_tclass_qdisc(struct Qdisc *q, struct sk_buff *skb,
generated by cgit (git 2.34.1) at 2024-05-23 23:18:44 +0000