K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2021-07-16T11:55:55.022896Z
K 7
svn:log
V 730
pf: bound DIOCGETSTATESV2 memory use

Rather than allocating however much memory userspace asks for we only
allocate enough for a handful of states, and copy to userspace for each
completed row.
We start out with enough space for 16 states (per row), but grow that as
required. In most configurations we expect at most a handful of states
per row (more than that would have other negative effects on packet
processing performance).

Reviewed by:	mjg
MFC after:	1 week
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D31111

(cherry picked from commit 3fc12ae042040192aa43984106a75663aaa9e0f5)

Git Hash:   4feb5667f59d7542395b021d1852e792b4baf90a
Git Author: kp@FreeBSD.org
END