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net: introduce nla_put_bitfield32() helper and use it

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Introduce a helper to pass value and selector to. The helper packs them
into struct and puts them into netlink message.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2020-03-28 16:37:42 +01:00 committed by David S. Miller
parent acc086bfb9
commit 8953b0770f
3 changed files with 25 additions and 21 deletions
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15
include/net/netlink.h
View file

@ -1465,6 +1465,21 @@ static inline int nla_put_in6_addr(struct sk_buff *skb, int attrtype,
return nla_put(skb, attrtype, sizeof(*addr), addr);
}
/**
* nla_put_bitfield32 - Add a bitfield32 netlink attribute to a socket buffer
* @skb: socket buffer to add attribute to
* @attrtype: attribute type
* @value: value carrying bits
* @selector: selector of valid bits
*/
static inline int nla_put_bitfield32(struct sk_buff *skb, int attrtype,
__u32 value, __u32 selector)
{
struct nla_bitfield32 tmp = { value, selector, };
return nla_put(skb, attrtype, sizeof(tmp), &tmp);
}
/**
* nla_get_u32 - return payload of u32 attribute
* @nla: u32 netlink attribute

24
net/sched/act_api.c
View file

@ -789,23 +789,15 @@ tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
}
rcu_read_unlock();
if (a->hw_stats != TCA_ACT_HW_STATS_ANY) {
struct nla_bitfield32 hw_stats = {
a->hw_stats,
TCA_ACT_HW_STATS_ANY,
};
if (a->hw_stats != TCA_ACT_HW_STATS_ANY &&
nla_put_bitfield32(skb, TCA_ACT_HW_STATS,
a->hw_stats, TCA_ACT_HW_STATS_ANY))
goto nla_put_failure;
if (nla_put(skb, TCA_ACT_HW_STATS, sizeof(hw_stats), &hw_stats))
goto nla_put_failure;
}
if (a->tcfa_flags) {
struct nla_bitfield32 flags = { a->tcfa_flags,
a->tcfa_flags, };
if (nla_put(skb, TCA_ACT_FLAGS, sizeof(flags), &flags))
goto nla_put_failure;
}
if (a->tcfa_flags &&
nla_put_bitfield32(skb, TCA_ACT_FLAGS,
a->tcfa_flags, a->tcfa_flags))
goto nla_put_failure;
nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (nest == NULL)

7
net/sched/sch_red.c
View file

@ -349,10 +349,6 @@ static int red_dump_offload_stats(struct Qdisc *sch)
static int red_dump(struct Qdisc *sch, struct sk_buff *skb)
{
struct red_sched_data *q = qdisc_priv(sch);
struct nla_bitfield32 flags_bf = {
.selector = red_supported_flags,
.value = q->flags,
};
struct nlattr *opts = NULL;
struct tc_red_qopt opt = {
.limit = q->limit,
@ -375,7 +371,8 @@ static int red_dump(struct Qdisc *sch, struct sk_buff *skb)
goto nla_put_failure;
if (nla_put(skb, TCA_RED_PARMS, sizeof(opt), &opt) ||
nla_put_u32(skb, TCA_RED_MAX_P, q->parms.max_P) ||
nla_put(skb, TCA_RED_FLAGS, sizeof(flags_bf), &flags_bf))
nla_put_bitfield32(skb, TCA_RED_FLAGS,
q->flags, red_supported_flags))
goto nla_put_failure;
return nla_nest_end(skb, opts);