Date: Thu, 23 Feb 2017 06:57:19 +0000 (UTC) From: Dexuan Cui <dexuan@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r314122 - stable/10/sys/net Message-ID: <201702230657.v1N6vJ7Q013058@repo.freebsd.org>
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Author: dexuan Date: Thu Feb 23 06:57:18 2017 New Revision: 314122 URL: https://svnweb.freebsd.org/changeset/base/314122 Log: 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 Modified: stable/10/sys/net/if.c stable/10/sys/net/if_var.h Modified: stable/10/sys/net/if.c ============================================================================== --- stable/10/sys/net/if.c Thu Feb 23 06:49:46 2017 (r314121) +++ stable/10/sys/net/if.c Thu Feb 23 06:57:18 2017 (r314122) @@ -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); } /* Modified: stable/10/sys/net/if_var.h ============================================================================== --- stable/10/sys/net/if_var.h Thu Feb 23 06:49:46 2017 (r314121) +++ stable/10/sys/net/if_var.h Thu Feb 23 06:57:18 2017 (r314122) @@ -424,6 +424,11 @@ EVENTHANDLER_DECLARE(ifnet_departure_eve /* 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
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