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Commit 801f8746 authored by Johannes Berg's avatar Johannes Berg
Browse files

netlink: add nl_set_extack_cookie_u64() 



Add a helper function nl_set_extack_cookie_u64() to use a u64 as
the netlink extended ACK cookie, to avoid having to open-code it
in any users of the cookie.

A u64 should be sufficient for most subsystems though we allow
for up to 20 bytes right now. This also matches the cookies in
nl80211 where I intend to use this.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent e0ba7095

include/linux/netlink.h

+9 −0
Original line number Original line Diff line number Diff line
@@ -110,6 +110,15 @@ struct netlink_ext_ack { 
	}						\

	}						\

} while (0)

} while (0)





static inline void nl_set_extack_cookie_u64(struct netlink_ext_ack *extack,

					    u64 cookie)

{

	u64 __cookie = cookie;



	memcpy(extack->cookie, &__cookie, sizeof(__cookie));

	extack->cookie_len = sizeof(__cookie);

}



extern void netlink_kernel_release(struct sock *sk);

extern void netlink_kernel_release(struct sock *sk);

extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups);

extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups);

extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);

extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);