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net: sched: cls_route: no need to call tcf_exts_change for newly allocated struct

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As the f struct was allocated right before route4_set_parms call,
no need to use tcf_exts_change to do atomic change, and we can just
fill-up the unused exts struct directly by tcf_exts_validate.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2017-08-04 14:29:13 +02:00 committed by David S. Miller
parent c09fc2e11e
commit 8c98d571bb
1 changed files with 9 additions and 21 deletions
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30
net/sched/cls_route.c
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@ -372,37 +372,32 @@ static int route4_set_parms(struct net *net, struct tcf_proto *tp,
struct route4_filter *fp;
unsigned int h1;
struct route4_bucket *b;
struct tcf_exts e;
int err;
err = tcf_exts_init(&e, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr);
if (err < 0)
return err;
err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
if (err < 0)
goto errout;
err = -EINVAL;
if (tb[TCA_ROUTE4_TO]) {
if (new && handle & 0x8000)
goto errout;
return -EINVAL;
to = nla_get_u32(tb[TCA_ROUTE4_TO]);
if (to > 0xFF)
goto errout;
return -EINVAL;
nhandle = to;
}
if (tb[TCA_ROUTE4_FROM]) {
if (tb[TCA_ROUTE4_IIF])
goto errout;
return -EINVAL;
id = nla_get_u32(tb[TCA_ROUTE4_FROM]);
if (id > 0xFF)
goto errout;
return -EINVAL;
nhandle |= id << 16;
} else if (tb[TCA_ROUTE4_IIF]) {
id = nla_get_u32(tb[TCA_ROUTE4_IIF]);
if (id > 0x7FFF)
goto errout;
return -EINVAL;
nhandle |= (id | 0x8000) << 16;
} else
nhandle |= 0xFFFF << 16;
@ -410,27 +405,25 @@ static int route4_set_parms(struct net *net, struct tcf_proto *tp,
if (handle && new) {
nhandle |= handle & 0x7F00;
if (nhandle != handle)
goto errout;
return -EINVAL;
}
h1 = to_hash(nhandle);
b = rtnl_dereference(head->table[h1]);
if (!b) {
err = -ENOBUFS;
b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL);
if (b == NULL)
goto errout;
return -ENOBUFS;
rcu_assign_pointer(head->table[h1], b);
} else {
unsigned int h2 = from_hash(nhandle >> 16);
err = -EEXIST;
for (fp = rtnl_dereference(b->ht[h2]);
fp;
fp = rtnl_dereference(fp->next))
if (fp->handle == f->handle)
goto errout;
return -EEXIST;
}
if (tb[TCA_ROUTE4_TO])
@ -450,12 +443,7 @@ static int route4_set_parms(struct net *net, struct tcf_proto *tp,
tcf_bind_filter(tp, &f->res, base);
}
tcf_exts_change(tp, &f->exts, &e);
return 0;
errout:
tcf_exts_destroy(&e);
return err;
}
static int route4_change(struct net *net, struct sk_buff *in_skb,