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Currently nlmsg_unicast() is used by functions that dump structures that
can be different in size for compat tasks, see dump_one_state() and
dump_one_policy().
The following nlmsg_unicast() users exist today in xfrm:
Function | Message can be different
| in size on compat
-------------------------------------------|------------------------------
xfrm_get_spdinfo() | N
xfrm_get_sadinfo() | N
xfrm_get_sa() | Y
xfrm_alloc_userspi() | Y
xfrm_get_policy() | Y
xfrm_get_ae() | N
Besides, dump_one_state() and dump_one_policy() can be used by filtered
netlink dump for XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY.
Just as for xfrm multicast, allocate frag_list for compat skb journey
down to recvmsg() which will give user the desired skb according to
syscall bitness.
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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