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tipc: Introduce __tipc_nl_bearer_set

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Introduce __tipc_nl_bearer_set() which doesn't holding RTNL lock.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2018-02-14 13:38:01 +08:00 committed by David S. Miller
parent 45cf7edfbc
commit 93532bb1d4
2 changed files with 15 additions and 9 deletions
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23
net/tipc/bearer.c
View File

@ -954,7 +954,7 @@ int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
return 0;
}
int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
{
int err;
char *name;
@ -975,22 +975,17 @@ int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
rtnl_lock();
b = tipc_bearer_find(net, name);
if (!b) {
rtnl_unlock();
if (!b)
return -EINVAL;
}
if (attrs[TIPC_NLA_BEARER_PROP]) {
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
props);
if (err) {
rtnl_unlock();
if (err)
return err;
}
if (props[TIPC_NLA_PROP_TOL])
b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
@ -999,11 +994,21 @@ int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
if (props[TIPC_NLA_PROP_WIN])
b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
}
rtnl_unlock();
return 0;
}
int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
{
int err;
rtnl_lock();
err = __tipc_nl_bearer_set(skb, info);
rtnl_unlock();
return err;
}
static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
struct tipc_media *media, int nlflags)
{

1
net/tipc/bearer.h
View File

@ -194,6 +194,7 @@ int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb);