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authorChristophe Ricard <christophe.ricard@gmail.com>2015-08-28 08:07:48 +0300
committerDavid S. Miller <davem@davemloft.net>2015-08-29 08:25:42 +0300
commit0a6a3a23ea6efde079a5b77688541a98bf202721 (patch)
treeec9cd4b088e93a12c26ebf9fcb8b7bf5abe2510d /include
parent4941b8f0c2b9d88e8a6dacebf8b7faf603b98368 (diff)
downloadlinux-0a6a3a23ea6efde079a5b77688541a98bf202721.tar.xz
netlink: add NETLINK_CAP_ACK socket option
Since commit c05cdb1b864f ("netlink: allow large data transfers from user-space"), the kernel may fail to allocate the necessary room for the acknowledgment message back to userspace. This patch introduces a new socket option that trims off the payload of the original netlink message. The netlink message header is still included, so the user can guess from the sequence number what is the message that has triggered the acknowledgment. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/netlink.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h
index cf6a65cccbdf..6f3fe16cd22a 100644
--- a/include/uapi/linux/netlink.h
+++ b/include/uapi/linux/netlink.h
@@ -110,6 +110,7 @@ struct nlmsgerr {
#define NETLINK_TX_RING 7
#define NETLINK_LISTEN_ALL_NSID 8
#define NETLINK_LIST_MEMBERSHIPS 9
+#define NETLINK_CAP_ACK 10
struct nl_pktinfo {
__u32 group;