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net: Add variants of capable for use on netlink messages

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netlink_net_capable - The common case use, for operations that are safe on a network namespace
netlink_capable - For operations that are only known to be safe for the global root
netlink_ns_capable - The general case of capable used to handle special cases

__netlink_ns_capable - Same as netlink_ns_capable except taking a netlink_skb_parms instead of
		       the skbuff of a netlink message.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2014-04-23 14:28:03 -07:00 • committed by David S. Miller
commit aa4cf9452f
2 changed files with 72 additions and 0 deletions
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7
include/linux/netlink.h
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@ -169,4 +169,11 @@ struct netlink_tap {
extern int netlink_add_tap(struct netlink_tap *nt);
extern int netlink_remove_tap(struct netlink_tap *nt);
bool __netlink_ns_capable(const struct netlink_skb_parms *nsp,
struct user_namespace *ns, int cap);
bool netlink_ns_capable(const struct sk_buff *skb,
struct user_namespace *ns, int cap);
bool netlink_capable(const struct sk_buff *skb, int cap);
bool netlink_net_capable(const struct sk_buff *skb, int cap);
#endif /* __LINUX_NETLINK_H */