diff options
| author | Thomas Graf <tgraf@suug.ch> | 2007-09-12 14:44:36 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:49:16 -0700 |
| commit | 8f4c1f9b049df3be11090f1c2c4738700302acae (patch) | |
| tree | 51271d32096e4419173072d120176b4428e52a11 /include | |
| parent | 9d5010db7ecfd6ec00119d3b185c4c0cd3265167 (diff) | |
[NETLINK]: Introduce nested and byteorder flag to netlink attribute
This change allows the generic attribute interface to be used within
the netfilter subsystem where this flag was initially introduced.
The byte-order flag is yet unused, it's intended use is to
allow automatic byte order convertions for all atomic types.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netlink.h | 14 | ||||
| -rw-r--r-- | include/net/netlink.h | 9 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h index d2843ae4a83a..e638256ce472 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -131,6 +131,20 @@ struct nlattr __u16 nla_type; }; +/* + * nla_type (16 bits) + * +---+---+-------------------------------+ + * | N | O | Attribute Type | + * +---+---+-------------------------------+ + * N := Carries nested attributes + * O := Payload stored in network byte order + * + * Note: The N and O flag are mutually exclusive. + */ +#define NLA_F_NESTED (1 << 15) +#define NLA_F_NET_BYTEORDER (1 << 14) +#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) + #define NLA_ALIGNTO 4 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) diff --git a/include/net/netlink.h b/include/net/netlink.h index d7b824be5422..695e613a207b 100644 --- a/include/net/netlink.h +++ b/include/net/netlink.h @@ -667,6 +667,15 @@ static inline int nla_padlen(int payload) } /** + * nla_type - attribute type + * @nla: netlink attribute + */ +static inline int nla_type(const struct nlattr *nla) +{ + return nla->nla_type & NLA_TYPE_MASK; +} + +/** * nla_data - head of payload * @nla: netlink attribute */ |