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| author | Johannes Berg <johannes.berg@intel.com> | 2018-08-23 10:48:13 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2018-11-09 11:20:07 +0100 |
| commit | 801f87469ee8d97af5997ef52188bb0e1908b110 (patch) | |
| tree | 099bea79832948f202936299d1159b0f4d67be61 | |
| parent | e0ba7095433a717a62d163dafe0fc2b0eba70d4b (diff) | |
| download | lwn-801f87469ee8d97af5997ef52188bb0e1908b110.tar.gz lwn-801f87469ee8d97af5997ef52188bb0e1908b110.zip | |
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: Johannes Berg <johannes.berg@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | include/linux/netlink.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h index 4da90a6ab536..0b83dbae0a57 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -110,6 +110,15 @@ struct netlink_ext_ack { } \ } 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 int __netlink_change_ngroups(struct sock *sk, unsigned int groups); extern int netlink_change_ngroups(struct sock *sk, unsigned int groups); |