From 801edb7982092c7fdc32ca79e679bc44e314d71f Mon Sep 17 00:00:00 2001 From: dexuan Date: Thu, 23 Feb 2017 06:57:18 +0000 Subject: MFC: r312687, r312916 Approved by: sephe (mentor) r312687 ifnet: introduce event handlers for ifup/ifdown events Hyper-V's NIC SR-IOV implementation needs a Hyper-V synthetic NIC and a VF NIC to work together, mainly to support seamless live migration. When the VF device becomes UP (or DOWN), the synthetic NIC driver needs to switch the data path from the synthetic NIC to the VF (or the opposite). So the synthetic NIC driver needs to know when a VF device is becoming UP or DOWN and hence the patch is made. Reviewed by: sephe Approved by: sephe (mentor) Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8963 r312916 ifnet: move the new ifnet_event EVENTHANDLER_DECLARE to net/if_var.h Thank glebius for pointing this out: "The network stuff shall not be added to sys/eventhandler.h" Reviewed by: David_A_Bright_DELL.com, sephe, glebius Approved by: sephe (mentor) Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D9345 --- sys/net/if.c | 2 ++ sys/net/if_var.h | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/sys/net/if.c b/sys/net/if.c index 67f086b..625b6d0 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -2183,6 +2183,7 @@ void if_down(struct ifnet *ifp) { + EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN); if_unroute(ifp, IFF_UP, AF_UNSPEC); } @@ -2195,6 +2196,7 @@ if_up(struct ifnet *ifp) { if_route(ifp, IFF_UP, AF_UNSPEC); + EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP); } /* diff --git a/sys/net/if_var.h b/sys/net/if_var.h index 01ca26c..1456793 100644 --- a/sys/net/if_var.h +++ b/sys/net/if_var.h @@ -424,6 +424,11 @@ EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); /* Interface link state change event */ typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int); EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t); +/* Interface up/down event */ +#define IFNET_EVENT_UP 0 +#define IFNET_EVENT_DOWN 1 +typedef void (*ifnet_event_fn)(void *, struct ifnet *ifp, int event); +EVENTHANDLER_DECLARE(ifnet_event, ifnet_event_fn); /* * interface groups -- cgit v1.1