5.15-stable review patch. If anyone has any objections, please let me know.
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From: Nikolay Aleksandrov razor@blackwall.org
[ Upstream commit 545528d788556c724eeb5400757f828ef27782a8 ]
Add a new delete request modifier called NLM_F_BULK which, when supported, would cause the request to delete multiple objects. The flag is a convenient way to signal that a multiple delete operation is requested which can be gradually added to different delete requests. In order to make sure older kernels will error out if the operation is not supported instead of doing something unintended we have to break a required condition when implementing support for this flag, f.e. for neighbors we will omit the mandatory mac address attribute. Initially it will be used to add flush with filtering support for bridge fdbs, but it also opens the door to add similar support to others.
Signed-off-by: Nikolay Aleksandrov razor@blackwall.org Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: bf29555f5bdc ("rtnetlink: Allow deleting FDB entries in user namespace") Signed-off-by: Sasha Levin sashal@kernel.org --- include/uapi/linux/netlink.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h index 4940a93315995..1e543cf0568c0 100644 --- a/include/uapi/linux/netlink.h +++ b/include/uapi/linux/netlink.h @@ -72,6 +72,7 @@ struct nlmsghdr {
/* Modifiers to DELETE request */ #define NLM_F_NONREC 0x100 /* Do not delete recursively */ +#define NLM_F_BULK 0x200 /* Delete multiple objects */
/* Flags for ACK message */ #define NLM_F_CAPPED 0x100 /* request was capped */