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block/drbd: align properly u64 in nl messages

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The attribute 0 is never used in drbd, so let's use it as pad attribute
in netlink messages. This minimizes the patch.

Note that this patch is only compile-tested.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2016-05-09 11:40:20 +02:00 • committed by David S. Miller
parent dc6079d8ab
commit 1dee3f59a8
2 changed files with 22 additions and 13 deletions
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7
include/linux/genl_magic_struct.h
View file

@ -62,6 +62,11 @@ extern void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void);
/* MAGIC helpers {{{2 */
static inline int nla_put_u64_0pad(struct sk_buff *skb, int attrtype, u64 value)
{
return nla_put_64bit(skb, attrtype, sizeof(u64), &value, 0);
}
/* possible field types */
#define __flg_field(attr_nr, attr_flag, name) \
__field(attr_nr, attr_flag, name, NLA_U8, char, \
@ -80,7 +85,7 @@ extern void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void);
nla_get_u32, nla_put_u32, true)
#define __u64_field(attr_nr, attr_flag, name) \
__field(attr_nr, attr_flag, name, NLA_U64, __u64, \
nla_get_u64, nla_put_u64, false)
nla_get_u64, nla_put_u64_0pad, false)
#define __str_field(attr_nr, attr_flag, name, maxlen) \
__array(attr_nr, attr_flag, name, NLA_NUL_STRING, char, maxlen, \
nla_strlcpy, nla_put, false)