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genetlink: Add genlmsg_parse() helper function.

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The first user will be the next patch.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Stringer 2015-01-21 16:42:51 -08:00 committed by David S. Miller
parent 272c2cf841
commit 7b1883cefc
1 changed files with 17 additions and 0 deletions
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17
include/net/genetlink.h
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@ -205,6 +205,23 @@ static inline struct nlmsghdr *genlmsg_nlhdr(void *user_hdr,
NLMSG_HDRLEN);
}
/**
* genlmsg_parse - parse attributes of a genetlink message
* @nlh: netlink message header
* @family: genetlink message family
* @tb: destination array with maxtype+1 elements
* @maxtype: maximum attribute type to be expected
* @policy: validation policy
* */
static inline int genlmsg_parse(const struct nlmsghdr *nlh,
const struct genl_family *family,
struct nlattr *tb[], int maxtype,
const struct nla_policy *policy)
{
return nlmsg_parse(nlh, family->hdrsize + GENL_HDRLEN, tb, maxtype,
policy);
}
/**
* genl_dump_check_consistent - check if sequence is consistent and advertise if not
* @cb: netlink callback structure that stores the sequence number