From 07ffb22357323c7189921935b24d68018e1a2b68 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Wed, 14 Feb 2018 13:38:02 +0800 Subject: [PATCH] tipc: Introduce __tipc_nl_media_set Introduce __tipc_nl_media_set() which doesn't hold RTNL lock. Signed-off-by: Ying Xue Signed-off-by: David S. Miller --- net/tipc/bearer.c | 23 ++++++++++++++--------- net/tipc/bearer.h | 1 + 2 files changed, 15 insertions(+), 9 deletions(-) diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index f92c9c58d686..3e3dce3d4c63 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -1130,7 +1130,7 @@ err_out: 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; +} diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index cc0f529a56b5..a53613d95bc9 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -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); -- 2.30.2