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[GENL]: Provide more information to userspace about registered genl families

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Additionaly exports the following information when providing
the list of registered generic netlink families:
  - protocol version
  - header size
  - maximum number of attributes
  - list of available operations including
      - id
      - flags
      - avaiability of policy and doit/dumpit function

libnl HEAD provides a utility to read this new information:

	0x0010 nlctrl version 1
	    hdrsize 0 maxattr 6
	      op GETFAMILY (0x03) [POLICY,DOIT,DUMPIT]
	0x0011 NLBL_MGMT version 1
	    hdrsize 0 maxattr 0
	      op unknown (0x02) [DOIT]
	      op unknown (0x03) [DOIT]
	      ....

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2006-09-18 00:01:59 -07:00 • committed by David S. Miller
parent 78e5b8916e
commit eb328111ef
3 changed files with 58 additions and 2 deletions
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18
include/linux/genetlink.h
View file

@ -16,6 +16,8 @@ struct genlmsghdr {
#define GENL_HDRLEN NLMSG_ALIGN(sizeof(struct genlmsghdr))
#define GENL_ADMIN_PERM 0x01
/*
* List of reserved static generic netlink identifiers:
*/
@ -43,9 +45,25 @@ enum {
CTRL_ATTR_UNSPEC,
CTRL_ATTR_FAMILY_ID,
CTRL_ATTR_FAMILY_NAME,
CTRL_ATTR_VERSION,
CTRL_ATTR_HDRSIZE,
CTRL_ATTR_MAXATTR,
CTRL_ATTR_OPS,
__CTRL_ATTR_MAX,
};
#define CTRL_ATTR_MAX (__CTRL_ATTR_MAX - 1)
enum {
CTRL_ATTR_OP_UNSPEC,
CTRL_ATTR_OP_ID,
CTRL_ATTR_OP_FLAGS,
CTRL_ATTR_OP_POLICY,
CTRL_ATTR_OP_DOIT,
CTRL_ATTR_OP_DUMPIT,
__CTRL_ATTR_OP_MAX,
};
#define CTRL_ATTR_OP_MAX (__CTRL_ATTR_OP_MAX - 1)
#endif /* __LINUX_GENERIC_NETLINK_H */