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tipc: Introduce __tipc_nl_media_set 

Introduce __tipc_nl_media_set() which doesn't hold 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 13:38:02 +08:00 committed by David S. Miller
parent 93532bb1d4
commit 07ffb22357
2 changed files with 15 additions and 9 deletions
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23
net/tipc/bearer.c
View File

@ -1130,7 +1130,7 @@ int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
return err;
}
int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
{
int err;
char *name;
@ -1148,22 +1148,17 @@ int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
rtnl_lock();
m = tipc_media_find(name);
if (!m) {
rtnl_unlock();
if (!m)
return -EINVAL;
}
if (attrs[TIPC_NLA_MEDIA_PROP]) {
struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
props);
if (err) {
rtnl_unlock();
if (err)
return err;
}
if (props[TIPC_NLA_PROP_TOL])
m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
@ -1172,7 +1167,17 @@ int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
if (props[TIPC_NLA_PROP_WIN])
m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
}
rtnl_unlock();
return 0;
}
int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
{
int err;
rtnl_lock();
err = __tipc_nl_media_set(skb, info);
rtnl_unlock();
return err;
}

1
net/tipc/bearer.h
View File

@ -200,6 +200,7 @@ 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);
int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
int tipc_media_set_priority(const char *name, u32 new_value);
int tipc_media_set_window(const char *name, u32 new_value);