linux/net/netlink
David Ahern 22e6c58b8c netlink: Add answer_flags to netlink_callback
With dump filtering we need a way to ensure the NLM_F_DUMP_FILTERED
flag is set on a message back to the user if the data returned is
influenced by some input attributes. Normally this can be done as
messages are added to the skb, but if the filter results in no data
being returned, the user could be confused as to why.

This patch adds answer_flags to the netlink_callback allowing dump
handlers to set the NLM_F_DUMP_FILTERED at a minimum in the
NLMSG_DONE message ensuring the flag gets back to the user.

The netlink_callback space is initialized to 0 via a memset in
__netlink_dump_start, so init of the new answer_flags is covered.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-16 00:13:12 -07:00
..
af_netlink.c netlink: Add answer_flags to netlink_callback 2018-10-16 00:13:12 -07:00
af_netlink.h netlink: Add new socket option to enable strict checking on dumps 2018-10-08 10:39:04 -07:00
diag.c rhashtable: Change rhashtable_walk_start to return void 2017-12-11 09:58:38 -05:00
genetlink.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
Kconfig netlink: remove mmapped netlink support 2016-02-18 11:42:18 -05:00
Makefile netlink: Diag core and basic socket info dumping (v2) 2013-03-21 12:38:03 -04:00